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-rw-r--r--fs/afs/Makefile7
-rw-r--r--fs/afs/afs.h146
-rw-r--r--fs/afs/afs_cm.h32
-rw-r--r--fs/afs/afs_fs.h48
-rw-r--r--fs/afs/afs_vl.h (renamed from fs/afs/vlclient.h)49
-rw-r--r--fs/afs/cache.c256
-rw-r--r--fs/afs/cache.h12
-rw-r--r--fs/afs/callback.c509
-rw-r--r--fs/afs/cell.c471
-rw-r--r--fs/afs/cell.h78
-rw-r--r--fs/afs/cmservice.c927
-rw-r--r--fs/afs/cmservice.h29
-rw-r--r--fs/afs/dir.c852
-rw-r--r--fs/afs/errors.h34
-rw-r--r--fs/afs/file.c124
-rw-r--r--fs/afs/fsclient.c1529
-rw-r--r--fs/afs/fsclient.h54
-rw-r--r--fs/afs/inode.c248
-rw-r--r--fs/afs/internal.h754
-rw-r--r--fs/afs/kafsasyncd.c255
-rw-r--r--fs/afs/kafsasyncd.h52
-rw-r--r--fs/afs/kafstimod.c205
-rw-r--r--fs/afs/kafstimod.h49
-rw-r--r--fs/afs/main.c262
-rw-r--r--fs/afs/misc.c38
-rw-r--r--fs/afs/mntpt.c141
-rw-r--r--fs/afs/mount.h23
-rw-r--r--fs/afs/netdevices.c68
-rw-r--r--fs/afs/proc.c230
-rw-r--r--fs/afs/rxrpc.c782
-rw-r--r--fs/afs/security.c356
-rw-r--r--fs/afs/server.c647
-rw-r--r--fs/afs/server.h102
-rw-r--r--fs/afs/super.c392
-rw-r--r--fs/afs/super.h45
-rw-r--r--fs/afs/transport.h21
-rw-r--r--fs/afs/types.h125
-rw-r--r--fs/afs/vlclient.c737
-rw-r--r--fs/afs/vlocation.c1224
-rw-r--r--fs/afs/vnode.c731
-rw-r--r--fs/afs/vnode.h94
-rw-r--r--fs/afs/volume.c290
-rw-r--r--fs/afs/volume.h140
43 files changed, 7048 insertions, 6120 deletions
diff --git a/fs/afs/Makefile b/fs/afs/Makefile
index 4029c9da4b8..cf83e5d6351 100644
--- a/fs/afs/Makefile
+++ b/fs/afs/Makefile
@@ -2,8 +2,6 @@
# Makefile for Red Hat Linux AFS client.
#
-#CFLAGS += -finstrument-functions
-
kafs-objs := \
callback.o \
cell.o \
@@ -12,14 +10,15 @@ kafs-objs := \
file.o \
fsclient.o \
inode.o \
- kafsasyncd.o \
- kafstimod.o \
main.o \
misc.o \
mntpt.o \
proc.o \
+ rxrpc.o \
+ security.o \
server.o \
super.o \
+ netdevices.o \
vlclient.o \
vlocation.o \
vnode.o \
diff --git a/fs/afs/afs.h b/fs/afs/afs.h
new file mode 100644
index 00000000000..52d0752265b
--- /dev/null
+++ b/fs/afs/afs.h
@@ -0,0 +1,146 @@
+/* AFS common types
+ *
+ * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#ifndef AFS_H
+#define AFS_H
+
+#include <linux/in.h>
+
+#define AFS_MAXCELLNAME 64 /* maximum length of a cell name */
+#define AFS_MAXVOLNAME 64 /* maximum length of a volume name */
+
+typedef unsigned afs_volid_t;
+typedef unsigned afs_vnodeid_t;
+typedef unsigned long long afs_dataversion_t;
+
+typedef enum {
+ AFSVL_RWVOL, /* read/write volume */
+ AFSVL_ROVOL, /* read-only volume */
+ AFSVL_BACKVOL, /* backup volume */
+} __attribute__((packed)) afs_voltype_t;
+
+typedef enum {
+ AFS_FTYPE_INVALID = 0,
+ AFS_FTYPE_FILE = 1,
+ AFS_FTYPE_DIR = 2,
+ AFS_FTYPE_SYMLINK = 3,
+} afs_file_type_t;
+
+/*
+ * AFS file identifier
+ */
+struct afs_fid {
+ afs_volid_t vid; /* volume ID */
+ afs_vnodeid_t vnode; /* file index within volume */
+ unsigned unique; /* unique ID number (file index version) */
+};
+
+/*
+ * AFS callback notification
+ */
+typedef enum {
+ AFSCM_CB_UNTYPED = 0, /* no type set on CB break */
+ AFSCM_CB_EXCLUSIVE = 1, /* CB exclusive to CM [not implemented] */
+ AFSCM_CB_SHARED = 2, /* CB shared by other CM's */
+ AFSCM_CB_DROPPED = 3, /* CB promise cancelled by file server */
+} afs_callback_type_t;
+
+struct afs_callback {
+ struct afs_fid fid; /* file identifier */
+ unsigned version; /* callback version */
+ unsigned expiry; /* time at which expires */
+ afs_callback_type_t type; /* type of callback */
+};
+
+#define AFSCBMAX 50 /* maximum callbacks transferred per bulk op */
+
+/*
+ * AFS volume information
+ */
+struct afs_volume_info {
+ afs_volid_t vid; /* volume ID */
+ afs_voltype_t type; /* type of this volume */
+ afs_volid_t type_vids[5]; /* volume ID's for possible types for this vol */
+
+ /* list of fileservers serving this volume */
+ size_t nservers; /* number of entries used in servers[] */
+ struct {
+ struct in_addr addr; /* fileserver address */
+ } servers[8];
+};
+
+/*
+ * AFS security ACE access mask
+ */
+typedef u32 afs_access_t;
+#define AFS_ACE_READ 0x00000001U /* - permission to read a file/dir */
+#define AFS_ACE_WRITE 0x00000002U /* - permission to write/chmod a file */
+#define AFS_ACE_INSERT 0x00000004U /* - permission to create dirent in a dir */
+#define AFS_ACE_LOOKUP 0x00000008U /* - permission to lookup a file/dir in a dir */
+#define AFS_ACE_DELETE 0x00000010U /* - permission to delete a dirent from a dir */
+#define AFS_ACE_LOCK 0x00000020U /* - permission to lock a file */
+#define AFS_ACE_ADMINISTER 0x00000040U /* - permission to change ACL */
+#define AFS_ACE_USER_A 0x01000000U /* - 'A' user-defined permission */
+#define AFS_ACE_USER_B 0x02000000U /* - 'B' user-defined permission */
+#define AFS_ACE_USER_C 0x04000000U /* - 'C' user-defined permission */
+#define AFS_ACE_USER_D 0x08000000U /* - 'D' user-defined permission */
+#define AFS_ACE_USER_E 0x10000000U /* - 'E' user-defined permission */
+#define AFS_ACE_USER_F 0x20000000U /* - 'F' user-defined permission */
+#define AFS_ACE_USER_G 0x40000000U /* - 'G' user-defined permission */
+#define AFS_ACE_USER_H 0x80000000U /* - 'H' user-defined permission */
+
+/*
+ * AFS file status information
+ */
+struct afs_file_status {
+ unsigned if_version; /* interface version */
+#define AFS_FSTATUS_VERSION 1
+
+ afs_file_type_t type; /* file type */
+ unsigned nlink; /* link count */
+ u64 size; /* file size */
+ afs_dataversion_t data_version; /* current data version */
+ u32 author; /* author ID */
+ u32 owner; /* owner ID */
+ u32 group; /* group ID */
+ afs_access_t caller_access; /* access rights for authenticated caller */
+ afs_access_t anon_access; /* access rights for unauthenticated caller */
+ umode_t mode; /* UNIX mode */
+ struct afs_fid parent; /* parent dir ID for non-dirs only */
+ time_t mtime_client; /* last time client changed data */
+ time_t mtime_server; /* last time server changed data */
+};
+
+/*
+ * AFS file status change request
+ */
+struct afs_store_status {
+ u32 mask; /* which bits of the struct are set */
+ u32 mtime_client; /* last time client changed data */
+ u32 owner; /* owner ID */
+ u32 group; /* group ID */
+ umode_t mode; /* UNIX mode */
+};
+
+#define AFS_SET_MTIME 0x01 /* set the mtime */
+#define AFS_SET_OWNER 0x02 /* set the owner ID */
+#define AFS_SET_GROUP 0x04 /* set the group ID (unsupported?) */
+#define AFS_SET_MODE 0x08 /* set the UNIX mode */
+#define AFS_SET_SEG_SIZE 0x10 /* set the segment size (unsupported) */
+
+/*
+ * AFS volume synchronisation information
+ */
+struct afs_volsync {
+ time_t creation; /* volume creation time */
+};
+
+#endif /* AFS_H */
diff --git a/fs/afs/afs_cm.h b/fs/afs/afs_cm.h
new file mode 100644
index 00000000000..7b4d4fab4c8
--- /dev/null
+++ b/fs/afs/afs_cm.h
@@ -0,0 +1,32 @@
+/* AFS Cache Manager definitions
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#ifndef AFS_CM_H
+#define AFS_CM_H
+
+#define AFS_CM_PORT 7001 /* AFS file server port */
+#define CM_SERVICE 1 /* AFS File Service ID */
+
+enum AFS_CM_Operations {
+ CBCallBack = 204, /* break callback promises */
+ CBInitCallBackState = 205, /* initialise callback state */
+ CBProbe = 206, /* probe client */
+ CBGetLock = 207, /* get contents of CM lock table */
+ CBGetCE = 208, /* get cache file description */
+ CBGetXStatsVersion = 209, /* get version of extended statistics */
+ CBGetXStats = 210, /* get contents of extended statistics data */
+ CBInitCallBackState3 = 213, /* initialise callback state, version 3 */
+ CBGetCapabilities = 65538, /* get client capabilities */
+};
+
+#define AFS_CAP_ERROR_TRANSLATION 0x1
+
+#endif /* AFS_FS_H */
diff --git a/fs/afs/afs_fs.h b/fs/afs/afs_fs.h
new file mode 100644
index 00000000000..89e0d1650a7
--- /dev/null
+++ b/fs/afs/afs_fs.h
@@ -0,0 +1,48 @@
+/* AFS File Service definitions
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#ifndef AFS_FS_H
+#define AFS_FS_H
+
+#define AFS_FS_PORT 7000 /* AFS file server port */
+#define FS_SERVICE 1 /* AFS File Service ID */
+
+enum AFS_FS_Operations {
+ FSFETCHDATA = 130, /* AFS Fetch file data */
+ FSFETCHSTATUS = 132, /* AFS Fetch file status */
+ FSREMOVEFILE = 136, /* AFS Remove a file */
+ FSCREATEFILE = 137, /* AFS Create a file */
+ FSRENAME = 138, /* AFS Rename or move a file or directory */
+ FSSYMLINK = 139, /* AFS Create a symbolic link */
+ FSLINK = 140, /* AFS Create a hard link */
+ FSMAKEDIR = 141, /* AFS Create a directory */
+ FSREMOVEDIR = 142, /* AFS Remove a directory */
+ FSGIVEUPCALLBACKS = 147, /* AFS Discard callback promises */
+ FSGETVOLUMEINFO = 148, /* AFS Get root volume information */
+ FSGETROOTVOLUME = 151, /* AFS Get root volume name */
+ FSLOOKUP = 161, /* AFS lookup file in directory */
+};
+
+enum AFS_FS_Errors {
+ VSALVAGE = 101, /* volume needs salvaging */
+ VNOVNODE = 102, /* no such file/dir (vnode) */
+ VNOVOL = 103, /* no such volume or volume unavailable */
+ VVOLEXISTS = 104, /* volume name already exists */
+ VNOSERVICE = 105, /* volume not currently in service */
+ VOFFLINE = 106, /* volume is currently offline (more info available [VVL-spec]) */
+ VONLINE = 107, /* volume is already online */
+ VDISKFULL = 108, /* disk partition is full */
+ VOVERQUOTA = 109, /* volume's maximum quota exceeded */
+ VBUSY = 110, /* volume is temporarily unavailable */
+ VMOVED = 111, /* volume moved to new server - ask this FS where */
+};
+
+#endif /* AFS_FS_H */
diff --git a/fs/afs/vlclient.h b/fs/afs/afs_vl.h
index e3d601179c4..8bbefe009ed 100644
--- a/fs/afs/vlclient.h
+++ b/fs/afs/afs_vl.h
@@ -1,6 +1,6 @@
-/* vlclient.h: Volume Location Service client interface
+/* AFS Volume Location Service client interface
*
- * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
+ * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
@@ -9,10 +9,19 @@
* 2 of the License, or (at your option) any later version.
*/
-#ifndef _LINUX_AFS_VLCLIENT_H
-#define _LINUX_AFS_VLCLIENT_H
+#ifndef AFS_VL_H
+#define AFS_VL_H
-#include "types.h"
+#include "afs.h"
+
+#define AFS_VL_PORT 7003 /* volume location service port */
+#define VL_SERVICE 52 /* RxRPC service ID for the Volume Location service */
+
+enum AFSVL_Operations {
+ VLGETENTRYBYID = 503, /* AFS Get Cache Entry By ID operation ID */
+ VLGETENTRYBYNAME = 504, /* AFS Get Cache Entry By Name operation ID */
+ VLPROBE = 514, /* AFS Probe Volume Location Service operation ID */
+};
enum AFSVL_Errors {
AFSVL_IDEXIST = 363520, /* Volume Id entry exists in vl database */
@@ -40,14 +49,16 @@ enum AFSVL_Errors {
AFSVL_BADVOLOPER = 363542, /* Bad volume operation code */
AFSVL_BADRELLOCKTYPE = 363543, /* Bad release lock type */
AFSVL_RERELEASE = 363544, /* Status report: last release was aborted */
- AFSVL_BADSERVERFLAG = 363545, /* Invalid replication site server °ag */
+ AFSVL_BADSERVERFLAG = 363545, /* Invalid replication site server °ag */
AFSVL_PERM = 363546, /* No permission access */
AFSVL_NOMEM = 363547, /* malloc/realloc failed to alloc enough memory */
};
-/* maps to "struct vldbentry" in vvl-spec.pdf */
+/*
+ * maps to "struct vldbentry" in vvl-spec.pdf
+ */
struct afs_vldbentry {
- char name[65]; /* name of volume (including NUL char) */
+ char name[65]; /* name of volume (with NUL char) */
afs_voltype_t type; /* volume type */
unsigned num_servers; /* num servers that hold instances of this vol */
unsigned clone_id; /* cloning ID */
@@ -68,26 +79,6 @@ struct afs_vldbentry {
#define AFS_VLSF_RWVOL 0x0004 /* this server holds a R/W instance of the volume */
#define AFS_VLSF_BACKVOL 0x0008 /* this server holds a backup instance of the volume */
} servers[8];
-
};
-/* look up a volume location database entry by name */
-extern int afs_rxvl_get_entry_by_name(struct afs_server *server,
- const char *volname,
- unsigned volnamesz,
- struct afs_cache_vlocation *entry);
-
-/* look up a volume location database entry by ID */
-extern int afs_rxvl_get_entry_by_id(struct afs_server *server,
- afs_volid_t volid,
- afs_voltype_t voltype,
- struct afs_cache_vlocation *entry);
-
-extern int afs_rxvl_get_entry_by_id_async(struct afs_async_op *op,
- afs_volid_t volid,
- afs_voltype_t voltype);
-
-extern int afs_rxvl_get_entry_by_id_async2(struct afs_async_op *op,
- struct afs_cache_vlocation *entry);
-
-#endif /* _LINUX_AFS_VLCLIENT_H */
+#endif /* AFS_VL_H */
diff --git a/fs/afs/cache.c b/fs/afs/cache.c
new file mode 100644
index 00000000000..de0d7de69ed
--- /dev/null
+++ b/fs/afs/cache.c
@@ -0,0 +1,256 @@
+/* AFS caching stuff
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#ifdef AFS_CACHING_SUPPORT
+static cachefs_match_val_t afs_cell_cache_match(void *target,
+ const void *entry);
+static void afs_cell_cache_update(void *source, void *entry);
+
+struct cachefs_index_def afs_cache_cell_index_def = {
+ .name = "cell_ix",
+ .data_size = sizeof(struct afs_cache_cell),
+ .keys[0] = { CACHEFS_INDEX_KEYS_ASCIIZ, 64 },
+ .match = afs_cell_cache_match,
+ .update = afs_cell_cache_update,
+};
+#endif
+
+/*
+ * match a cell record obtained from the cache
+ */
+#ifdef AFS_CACHING_SUPPORT
+static cachefs_match_val_t afs_cell_cache_match(void *target,
+ const void *entry)
+{
+ const struct afs_cache_cell *ccell = entry;
+ struct afs_cell *cell = target;
+
+ _enter("{%s},{%s}", ccell->name, cell->name);
+
+ if (strncmp(ccell->name, cell->name, sizeof(ccell->name)) == 0) {
+ _leave(" = SUCCESS");
+ return CACHEFS_MATCH_SUCCESS;
+ }
+
+ _leave(" = FAILED");
+ return CACHEFS_MATCH_FAILED;
+}
+#endif
+
+/*
+ * update a cell record in the cache
+ */
+#ifdef AFS_CACHING_SUPPORT
+static void afs_cell_cache_update(void *source, void *entry)
+{
+ struct afs_cache_cell *ccell = entry;
+ struct afs_cell *cell = source;
+
+ _enter("%p,%p", source, entry);
+
+ strncpy(ccell->name, cell->name, sizeof(ccell->name));
+
+ memcpy(ccell->vl_servers,
+ cell->vl_addrs,
+ min(sizeof(ccell->vl_servers), sizeof(cell->vl_addrs)));
+
+}
+#endif
+
+#ifdef AFS_CACHING_SUPPORT
+static cachefs_match_val_t afs_vlocation_cache_match(void *target,
+ const void *entry);
+static void afs_vlocation_cache_update(void *source, void *entry);
+
+struct cachefs_index_def afs_vlocation_cache_index_def = {
+ .name = "vldb",
+ .data_size = sizeof(struct afs_cache_vlocation),
+ .keys[0] = { CACHEFS_INDEX_KEYS_ASCIIZ, 64 },
+ .match = afs_vlocation_cache_match,
+ .update = afs_vlocation_cache_update,
+};
+#endif
+
+/*
+ * match a VLDB record stored in the cache
+ * - may also load target from entry
+ */
+#ifdef AFS_CACHING_SUPPORT
+static cachefs_match_val_t afs_vlocation_cache_match(void *target,
+ const void *entry)
+{
+ const struct afs_cache_vlocation *vldb = entry;
+ struct afs_vlocation *vlocation = target;
+
+ _enter("{%s},{%s}", vlocation->vldb.name, vldb->name);
+
+ if (strncmp(vlocation->vldb.name, vldb->name, sizeof(vldb->name)) == 0
+ ) {
+ if (!vlocation->valid ||
+ vlocation->vldb.rtime == vldb->rtime
+ ) {
+ vlocation->vldb = *vldb;
+ vlocation->valid = 1;
+ _leave(" = SUCCESS [c->m]");
+ return CACHEFS_MATCH_SUCCESS;
+ } else if (memcmp(&vlocation->vldb, vldb, sizeof(*vldb)) != 0) {
+ /* delete if VIDs for this name differ */
+ if (memcmp(&vlocation->vldb.vid,
+ &vldb->vid,
+ sizeof(vldb->vid)) != 0) {
+ _leave(" = DELETE");
+ return CACHEFS_MATCH_SUCCESS_DELETE;
+ }
+
+ _leave(" = UPDATE");
+ return CACHEFS_MATCH_SUCCESS_UPDATE;
+ } else {
+ _leave(" = SUCCESS");
+ return CACHEFS_MATCH_SUCCESS;
+ }
+ }
+
+ _leave(" = FAILED");
+ return CACHEFS_MATCH_FAILED;
+}
+#endif
+
+/*
+ * update a VLDB record stored in the cache
+ */
+#ifdef AFS_CACHING_SUPPORT
+static void afs_vlocation_cache_update(void *source, void *entry)
+{
+ struct afs_cache_vlocation *vldb = entry;
+ struct afs_vlocation *vlocation = source;
+
+ _enter("");
+
+ *vldb = vlocation->vldb;
+}
+#endif
+
+#ifdef AFS_CACHING_SUPPORT
+static cachefs_match_val_t afs_volume_cache_match(void *target,
+ const void *entry);
+static void afs_volume_cache_update(void *source, void *entry);
+
+struct cachefs_index_def afs_volume_cache_index_def = {
+ .name = "volume",
+ .data_size = sizeof(struct afs_cache_vhash),
+ .keys[0] = { CACHEFS_INDEX_KEYS_BIN, 1 },
+ .keys[1] = { CACHEFS_INDEX_KEYS_BIN, 1 },
+ .match = afs_volume_cache_match,
+ .update = afs_volume_cache_update,
+};
+#endif
+
+/*
+ * match a volume hash record stored in the cache
+ */
+#ifdef AFS_CACHING_SUPPORT
+static cachefs_match_val_t afs_volume_cache_match(void *target,
+ const void *entry)
+{
+ const struct afs_cache_vhash *vhash = entry;
+ struct afs_volume *volume = target;
+
+ _enter("{%u},{%u}", volume->type, vhash->vtype);
+
+ if (volume->type == vhash->vtype) {
+ _leave(" = SUCCESS");
+ return CACHEFS_MATCH_SUCCESS;
+ }
+
+ _leave(" = FAILED");
+ return CACHEFS_MATCH_FAILED;
+}
+#endif
+
+/*
+ * update a volume hash record stored in the cache
+ */
+#ifdef AFS_CACHING_SUPPORT
+static void afs_volume_cache_update(void *source, void *entry)
+{
+ struct afs_cache_vhash *vhash = entry;
+ struct afs_volume *volume = source;
+
+ _enter("");
+
+ vhash->vtype = volume->type;
+}
+#endif
+
+#ifdef AFS_CACHING_SUPPORT
+static cachefs_match_val_t afs_vnode_cache_match(void *target,
+ const void *entry);
+static void afs_vnode_cache_update(void *source, void *entry);
+
+struct cachefs_index_def afs_vnode_cache_index_def = {
+ .name = "vnode",
+ .data_size = sizeof(struct afs_cache_vnode),
+ .keys[0] = { CACHEFS_INDEX_KEYS_BIN, 4 },
+ .match = afs_vnode_cache_match,
+ .update = afs_vnode_cache_update,
+};
+#endif
+
+/*
+ * match a vnode record stored in the cache
+ */
+#ifdef AFS_CACHING_SUPPORT
+static cachefs_match_val_t afs_vnode_cache_match(void *target,
+ const void *entry)
+{
+ const struct afs_cache_vnode *cvnode = entry;
+ struct afs_vnode *vnode = target;
+
+ _enter("{%x,%x,%Lx},{%x,%x,%Lx}",
+ vnode->fid.vnode,
+ vnode->fid.unique,
+ vnode->status.version,
+ cvnode->vnode_id,
+ cvnode->vnode_unique,
+ cvnode->data_version);
+
+ if (vnode->fid.vnode != cvnode->vnode_id) {
+ _leave(" = FAILED");
+ return CACHEFS_MATCH_FAILED;
+ }
+
+ if (vnode->fid.unique != cvnode->vnode_unique ||
+ vnode->status.version != cvnode->data_version) {
+ _leave(" = DELETE");
+ return CACHEFS_MATCH_SUCCESS_DELETE;
+ }
+
+ _leave(" = SUCCESS");
+ return CACHEFS_MATCH_SUCCESS;
+}
+#endif
+
+/*
+ * update a vnode record stored in the cache
+ */
+#ifdef AFS_CACHING_SUPPORT
+static void afs_vnode_cache_update(void *source, void *entry)
+{
+ struct afs_cache_vnode *cvnode = entry;
+ struct afs_vnode *vnode = source;
+
+ _enter("");
+
+ cvnode->vnode_id = vnode->fid.vnode;
+ cvnode->vnode_unique = vnode->fid.unique;
+ cvnode->data_version = vnode->status.version;
+}
+#endif
diff --git a/fs/afs/cache.h b/fs/afs/cache.h
index 9eb7722b34d..36a3642cf90 100644
--- a/fs/afs/cache.h
+++ b/fs/afs/cache.h
@@ -1,4 +1,4 @@
-/* cache.h: AFS local cache management interface
+/* AFS local cache management interface
*
* Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
@@ -9,8 +9,8 @@
* 2 of the License, or (at your option) any later version.
*/
-#ifndef _LINUX_AFS_CACHE_H
-#define _LINUX_AFS_CACHE_H
+#ifndef AFS_CACHE_H
+#define AFS_CACHE_H
#undef AFS_CACHING_SUPPORT
@@ -20,8 +20,4 @@
#endif
#include "types.h"
-#ifdef __KERNEL__
-
-#endif /* __KERNEL__ */
-
-#endif /* _LINUX_AFS_CACHE_H */
+#endif /* AFS_CACHE_H */
diff --git a/fs/afs/callback.c b/fs/afs/callback.c
index 9cb206e9d4b..9bdbf36a9aa 100644
--- a/fs/afs/callback.c
+++ b/fs/afs/callback.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2002 Red Hat, Inc. All rights reserved.
+ * Copyright (c) 2002, 2007 Red Hat, Inc. All rights reserved.
*
* This software may be freely redistributed under the terms of the
* GNU General Public License.
@@ -16,85 +16,187 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
-#include "server.h"
-#include "vnode.h"
+#include <linux/circ_buf.h>
#include "internal.h"
-#include "cmservice.h"
-/*****************************************************************************/
+unsigned afs_vnode_update_timeout = 10;
+
+#define afs_breakring_space(server) \
+ CIRC_SPACE((server)->cb_break_head, (server)->cb_break_tail, \
+ ARRAY_SIZE((server)->cb_break))
+
+//static void afs_callback_updater(struct work_struct *);
+
+static struct workqueue_struct *afs_callback_update_worker;
+
/*
* allow the fileserver to request callback state (re-)initialisation
*/
-int SRXAFSCM_InitCallBackState(struct afs_server *server)
+void afs_init_callback_state(struct afs_server *server)
{
- struct list_head callbacks;
+ struct afs_vnode *vnode;
- _enter("%p", server);
+ _enter("{%p}", server);
- INIT_LIST_HEAD(&callbacks);
-
- /* transfer the callback list from the server to a temp holding area */
spin_lock(&server->cb_lock);
- list_add(&callbacks, &server->cb_promises);
- list_del_init(&server->cb_promises);
+ /* kill all the promises on record from this server */
+ while (!RB_EMPTY_ROOT(&server->cb_promises)) {
+ vnode = rb_entry(server->cb_promises.rb_node,
+ struct afs_vnode, cb_promise);
+ _debug("UNPROMISE { vid=%x vn=%u uq=%u}",
+ vnode->fid.vid, vnode->fid.vnode, vnode->fid.unique);
+ rb_erase(&vnode->cb_promise, &server->cb_promises);
+ vnode->cb_promised = false;
+ }
- /* munch our way through the list, grabbing the inode, dropping all the
- * locks and regetting them in the right order
- */
- while (!list_empty(&callbacks)) {
- struct afs_vnode *vnode;
- struct inode *inode;
+ spin_unlock(&server->cb_lock);
+ _leave("");
+}
- vnode = list_entry(callbacks.next, struct afs_vnode, cb_link);
- list_del_init(&vnode->cb_link);
+/*
+ * handle the data invalidation side of a callback being broken
+ */
+void afs_broken_callback_work(struct work_struct *work)
+{
+ struct afs_vnode *vnode =
+ container_of(work, struct afs_vnode, cb_broken_work);
- /* try and grab the inode - may fail */
- inode = igrab(AFS_VNODE_TO_I(vnode));
- if (inode) {
- int release = 0;
+ _enter("");
- spin_unlock(&server->cb_lock);
- spin_lock(&vnode->lock);
+ if (test_bit(AFS_VNODE_DELETED, &vnode->flags))
+ return;
- if (vnode->cb_server == server) {
- vnode->cb_server = NULL;
- afs_kafstimod_del_timer(&vnode->cb_timeout);
- spin_lock(&afs_cb_hash_lock);
- list_del_init(&vnode->cb_hash_link);
- spin_unlock(&afs_cb_hash_lock);
- release = 1;
- }
+ /* we're only interested in dealing with a broken callback on *this*
+ * vnode and only if no-one else has dealt with it yet */
+ if (!mutex_trylock(&vnode->validate_lock))
+ return; /* someone else is dealing with it */
- spin_unlock(&vnode->lock);
+ if (test_bit(AFS_VNODE_CB_BROKEN, &vnode->flags)) {
+ if (S_ISDIR(vnode->vfs_inode.i_mode))
+ afs_clear_permits(vnode);
- iput(inode);
- afs_put_server(server);
+ if (afs_vnode_fetch_status(vnode, NULL, NULL) < 0)
+ goto out;
- spin_lock(&server->cb_lock);
+ if (test_bit(AFS_VNODE_DELETED, &vnode->flags))
+ goto out;
+
+ /* if the vnode's data version number changed then its contents
+ * are different */
+ if (test_and_clear_bit(AFS_VNODE_ZAP_DATA, &vnode->flags)) {
+ _debug("zap data {%x:%u}",
+ vnode->fid.vid, vnode->fid.vnode);
+ invalidate_remote_inode(&vnode->vfs_inode);
}
}
- spin_unlock(&server->cb_lock);
+out:
+ mutex_unlock(&vnode->validate_lock);
- _leave(" = 0");
- return 0;
-} /* end SRXAFSCM_InitCallBackState() */
+ /* avoid the potential race whereby the mutex_trylock() in this
+ * function happens again between the clear_bit() and the
+ * mutex_unlock() */
+ if (test_bit(AFS_VNODE_CB_BROKEN, &vnode->flags)) {
+ _debug("requeue");
+ queue_work(afs_callback_update_worker, &vnode->cb_broken_work);
+ }
+ _leave("");
+}
+
+/*
+ * actually break a callback
+ */
+static void afs_break_callback(struct afs_server *server,
+ struct afs_vnode *vnode)
+{
+ _enter("");
+
+ set_bit(AFS_VNODE_CB_BROKEN, &vnode->flags);
+
+ if (vnode->cb_promised) {
+ spin_lock(&vnode->lock);
+
+ _debug("break callback");
+
+ spin_lock(&server->cb_lock);
+ if (vnode->cb_promised) {
+ rb_erase(&vnode->cb_promise, &server->cb_promises);
+ vnode->cb_promised = false;
+ }
+ spin_unlock(&server->cb_lock);
+
+ queue_work(afs_callback_update_worker, &vnode->cb_broken_work);
+ spin_unlock(&vnode->lock);
+ }
+}
+
+/*
+ * allow the fileserver to explicitly break one callback
+ * - happens when
+ * - the backing file is changed
+ * - a lock is released
+ */
+static void afs_break_one_callback(struct afs_server *server,
+ struct afs_fid *fid)
+{
+ struct afs_vnode *vnode;
+ struct rb_node *p;
+
+ _debug("find");
+ spin_lock(&server->fs_lock);
+ p = server->fs_vnodes.rb_node;
+ while (p) {
+ vnode = rb_entry(p, struct afs_vnode, server_rb);
+ if (fid->vid < vnode->fid.vid)
+ p = p->rb_left;
+ else if (fid->vid > vnode->fid.vid)
+ p = p->rb_right;
+ else if (fid->vnode < vnode->fid.vnode)
+ p = p->rb_left;
+ else if (fid->vnode > vnode->fid.vnode)
+ p = p->rb_right;
+ else if (fid->unique < vnode->fid.unique)
+ p = p->rb_left;
+ else if (fid->unique > vnode->fid.unique)
+ p = p->rb_right;
+ else
+ goto found;
+ }
+
+ /* not found so we just ignore it (it may have moved to another
+ * server) */
+not_available:
+ _debug("not avail");
+ spin_unlock(&server->fs_lock);
+ _leave("");
+ return;
+
+found:
+ _debug("found");
+ ASSERTCMP(server, ==, vnode->server);
+
+ if (!igrab(AFS_VNODE_TO_I(vnode)))
+ goto not_available;
+ spin_unlock(&server->fs_lock);
+
+ afs_break_callback(server, vnode);
+ iput(&vnode->vfs_inode);
+ _leave("");
+}
-/*****************************************************************************/
/*
* allow the fileserver to break callback promises
*/
-int SRXAFSCM_CallBack(struct afs_server *server, size_t count,
- struct afs_callback callbacks[])
+void afs_break_callbacks(struct afs_server *server, size_t count,
+ struct afs_callback callbacks[])
{
- _enter("%p,%u,", server, count);
+ _enter("%p,%zu,", server, count);
- for (; count > 0; callbacks++, count--) {
- struct afs_vnode *vnode = NULL;
- struct inode *inode = NULL;
- int valid = 0;
+ ASSERT(server != NULL);
+ ASSERTCMP(count, <=, AFSCBMAX);
+ for (; count > 0; callbacks++, count--) {
_debug("- Fid { vl=%08x n=%u u=%u } CB { v=%u x=%u t=%u }",
callbacks->fid.vid,
callbacks->fid.vnode,
@@ -103,67 +205,270 @@ int SRXAFSCM_CallBack(struct afs_server *server, size_t count,
callbacks->expiry,
callbacks->type
);
+ afs_break_one_callback(server, &callbacks->fid);
+ }
- /* find the inode for this fid */
- spin_lock(&afs_cb_hash_lock);
+ _leave("");
+ return;
+}
- list_for_each_entry(vnode,
- &afs_cb_hash(server, &callbacks->fid),
- cb_hash_link) {
- if (memcmp(&vnode->fid, &callbacks->fid,
- sizeof(struct afs_fid)) != 0)
- continue;
+/*
+ * record the callback for breaking
+ * - the caller must hold server->cb_lock
+ */
+static void afs_do_give_up_callback(struct afs_server *server,
+ struct afs_vnode *vnode)
+{
+ struct afs_callback *cb;
- /* right vnode, but is it same server? */
- if (vnode->cb_server != server)
- break; /* no */
+ _enter("%p,%p", server, vnode);
- /* try and nail the inode down */
- inode = igrab(AFS_VNODE_TO_I(vnode));
- break;
+ cb = &server->cb_break[server->cb_break_head];
+ cb->fid = vnode->fid;
+ cb->version = vnode->cb_version;
+ cb->expiry = vnode->cb_expiry;
+ cb->type = vnode->cb_type;
+ smp_wmb();
+ server->cb_break_head =
+ (server->cb_break_head + 1) &
+ (ARRAY_SIZE(server->cb_break) - 1);
+
+ /* defer the breaking of callbacks to try and collect as many as
+ * possible to ship in one operation */
+ switch (atomic_inc_return(&server->cb_break_n)) {
+ case 1 ... AFSCBMAX - 1:
+ queue_delayed_work(afs_callback_update_worker,
+ &server->cb_break_work, HZ * 2);
+ break;
+ case AFSCBMAX:
+ afs_flush_callback_breaks(server);
+ break;
+ default:
+ break;
+ }
+
+ ASSERT(server->cb_promises.rb_node != NULL);
+ rb_erase(&vnode->cb_promise, &server->cb_promises);
+ vnode->cb_promised = false;
+ _leave("");
+}
+
+/*
+ * discard the callback on a deleted item
+ */
+void afs_discard_callback_on_delete(struct afs_vnode *vnode)
+{
+ struct afs_server *server = vnode->server;
+
+ _enter("%d", vnode->cb_promised);
+
+ if (!vnode->cb_promised) {
+ _leave(" [not promised]");
+ return;
+ }
+
+ ASSERT(server != NULL);
+
+ spin_lock(&server->cb_lock);
+ if (vnode->cb_promised) {
+ ASSERT(server->cb_promises.rb_node != NULL);
+ rb_erase(&vnode->cb_promise, &server->cb_promises);
+ vnode->cb_promised = false;
+ }
+ spin_unlock(&server->cb_lock);
+ _leave("");
+}
+
+/*
+ * give up the callback registered for a vnode on the file server when the
+ * inode is being cleared
+ */
+void afs_give_up_callback(struct afs_vnode *vnode)
+{
+ struct afs_server *server = vnode->server;
+
+ DECLARE_WAITQUEUE(myself, current);
+
+ _enter("%d", vnode->cb_promised);
+
+ _debug("GIVE UP INODE %p", &vnode->vfs_inode);
+
+ if (!vnode->cb_promised) {
+ _leave(" [not promised]");
+ return;
+ }
+
+ ASSERT(server != NULL);
+
+ spin_lock(&server->cb_lock);
+ if (vnode->cb_promised && afs_breakring_space(server) == 0) {
+ add_wait_queue(&server->cb_break_waitq, &myself);
+ for (;;) {
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ if (!vnode->cb_promised ||
+ afs_breakring_space(server) != 0)
+ break;
+ spin_unlock(&server->cb_lock);
+ schedule();
+ spin_lock(&server->cb_lock);
}
+ remove_wait_queue(&server->cb_break_waitq, &myself);
+ __set_current_state(TASK_RUNNING);
+ }
+
+ /* of course, it's always possible for the server to break this vnode's
+ * callback first... */
+ if (vnode->cb_promised)
+ afs_do_give_up_callback(server, vnode);
+
+ spin_unlock(&server->cb_lock);
+ _leave("");
+}
+
+/*
+ * dispatch a deferred give up callbacks operation
+ */
+void afs_dispatch_give_up_callbacks(struct work_struct *work)
+{
+ struct afs_server *server =
+ container_of(work, struct afs_server, cb_break_work.work);
+
+ _enter("");
+
+ /* tell the fileserver to discard the callback promises it has
+ * - in the event of ENOMEM or some other error, we just forget that we
+ * had callbacks entirely, and the server will call us later to break
+ * them
+ */
+ afs_fs_give_up_callbacks(server, &afs_async_call);
+}
+
+/*
+ * flush the outstanding callback breaks on a server
+ */
+void afs_flush_callback_breaks(struct afs_server *server)
+{
+ cancel_delayed_work(&server->cb_break_work);
+ queue_delayed_work(afs_callback_update_worker,
+ &server->cb_break_work, 0);
+}
- spin_unlock(&afs_cb_hash_lock);
-
- if (inode) {
- /* we've found the record for this vnode */
- spin_lock(&vnode->lock);
- if (vnode->cb_server == server) {
- /* the callback _is_ on the calling server */
- vnode->cb_server = NULL;
- valid = 1;
-
- afs_kafstimod_del_timer(&vnode->cb_timeout);
- vnode->flags |= AFS_VNODE_CHANGED;
-
- spin_lock(&server->cb_lock);
- list_del_init(&vnode->cb_link);
- spin_unlock(&server->cb_lock);
-
- spin_lock(&afs_cb_hash_lock);
- list_del_init(&vnode->cb_hash_link);
- spin_unlock(&afs_cb_hash_lock);
- }
- spin_unlock(&vnode->lock);
-
- if (valid) {
- invalidate_remote_inode(inode);
- afs_put_server(server);
- }
- iput(inode);
+#if 0
+/*
+ * update a bunch of callbacks
+ */
+static void afs_callback_updater(struct work_struct *work)
+{
+ struct afs_server *server;
+ struct afs_vnode *vnode, *xvnode;
+ time_t now;
+ long timeout;
+ int ret;
+
+ server = container_of(work, struct afs_server, updater);
+
+ _enter("");
+
+ now = get_seconds();
+
+ /* find the first vnode to update */
+ spin_lock(&server->cb_lock);
+ for (;;) {
+ if (RB_EMPTY_ROOT(&server->cb_promises)) {
+ spin_unlock(&server->cb_lock);
+ _leave(" [nothing]");
+ return;
}
+
+ vnode = rb_entry(rb_first(&server->cb_promises),
+ struct afs_vnode, cb_promise);
+ if (atomic_read(&vnode->usage) > 0)
+ break;
+ rb_erase(&vnode->cb_promise, &server->cb_promises);
+ vnode->cb_promised = false;
}
- _leave(" = 0");
- return 0;
-} /* end SRXAFSCM_CallBack() */
+ timeout = vnode->update_at - now;
+ if (timeout > 0) {
+ queue_delayed_work(afs_vnode_update_worker,
+ &afs_vnode_update, timeout * HZ);
+ spin_unlock(&server->cb_lock);
+ _leave(" [nothing]");
+ return;
+ }
+
+ list_del_init(&vnode->update);
+ atomic_inc(&vnode->usage);
+ spin_unlock(&server->cb_lock);
+
+ /* we can now perform the update */
+ _debug("update %s", vnode->vldb.name);
+ vnode->state = AFS_VL_UPDATING;
+ vnode->upd_rej_cnt = 0;
+ vnode->upd_busy_cnt = 0;
+
+ ret = afs_vnode_update_record(vl, &vldb);
+ switch (ret) {
+ case 0:
+ afs_vnode_apply_update(vl, &vldb);
+ vnode->state = AFS_VL_UPDATING;
+ break;
+ case -ENOMEDIUM:
+ vnode->state = AFS_VL_VOLUME_DELETED;
+ break;
+ default:
+ vnode->state = AFS_VL_UNCERTAIN;
+ break;
+ }
+
+ /* and then reschedule */
+ _debug("reschedule");
+ vnode->update_at = get_seconds() + afs_vnode_update_timeout;
+
+ spin_lock(&server->cb_lock);
+
+ if (!list_empty(&server->cb_promises)) {
+ /* next update in 10 minutes, but wait at least 1 second more
+ * than the newest record already queued so that we don't spam
+ * the VL server suddenly with lots of requests
+ */
+ xvnode = list_entry(server->cb_promises.prev,
+ struct afs_vnode, update);
+ if (vnode->update_at <= xvnode->update_at)
+ vnode->update_at = xvnode->update_at + 1;
+ xvnode = list_entry(server->cb_promises.next,
+ struct afs_vnode, update);
+ timeout = xvnode->update_at - now;
+ if (timeout < 0)
+ timeout = 0;
+ } else {
+ timeout = afs_vnode_update_timeout;
+ }
+
+ list_add_tail(&vnode->update, &server->cb_promises);
+
+ _debug("timeout %ld", timeout);
+ queue_delayed_work(afs_vnode_update_worker,
+ &afs_vnode_update, timeout * HZ);
+ spin_unlock(&server->cb_lock);
+ afs_put_vnode(vl);
+}
+#endif
+
+/*
+ * initialise the callback update process
+ */
+int __init afs_callback_update_init(void)
+{
+ afs_callback_update_worker =
+ create_singlethread_workqueue("kafs_callbackd");
+ return afs_callback_update_worker ? 0 : -ENOMEM;
+}
-/*****************************************************************************/
/*
- * allow the fileserver to see if the cache manager is still alive
+ * shut down the callback update process
*/
-int SRXAFSCM_Probe(struct afs_server *server)
+void afs_callback_update_kill(void)
{
- _debug("SRXAFSCM_Probe(%p)\n", server);
- return 0;
-} /* end SRXAFSCM_Probe() */
+ destroy_workqueue(afs_callback_update_worker);
+}
diff --git a/fs/afs/cell.c b/fs/afs/cell.c
index 1fc57837275..9b1311a1df5 100644
--- a/fs/afs/cell.c
+++ b/fs/afs/cell.c
@@ -1,4 +1,4 @@
-/* cell.c: AFS cell and server record management
+/* AFS cell and server record management
*
* Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
@@ -11,15 +11,9 @@
#include <linux/module.h>
#include <linux/slab.h>
-#include <rxrpc/peer.h>
-#include <rxrpc/connection.h>
-#include "volume.h"
-#include "cell.h"
-#include "server.h"
-#include "transport.h"
-#include "vlclient.h"
-#include "kafstimod.h"
-#include "super.h"
+#include <linux/key.h>
+#include <linux/ctype.h>
+#include <keys/rxrpc-type.h>
#include "internal.h"
DECLARE_RWSEM(afs_proc_cells_sem);
@@ -28,66 +22,47 @@ LIST_HEAD(afs_proc_cells);
static struct list_head afs_cells = LIST_HEAD_INIT(afs_cells);
static DEFINE_RWLOCK(afs_cells_lock);
static DECLARE_RWSEM(afs_cells_sem); /* add/remove serialisation */
+static DECLARE_WAIT_QUEUE_HEAD(afs_cells_freeable_wq);
static struct afs_cell *afs_cell_root;
-#ifdef AFS_CACHING_SUPPORT
-static cachefs_match_val_t afs_cell_cache_match(void *target,
- const void *entry);
-static void afs_cell_cache_update(void *source, void *entry);
-
-struct cachefs_index_def afs_cache_cell_index_def = {
- .name = "cell_ix",
- .data_size = sizeof(struct afs_cache_cell),
- .keys[0] = { CACHEFS_INDEX_KEYS_ASCIIZ, 64 },
- .match = afs_cell_cache_match,
- .update = afs_cell_cache_update,
-};
-#endif
-
-/*****************************************************************************/
/*
- * create a cell record
- * - "name" is the name of the cell
- * - "vllist" is a colon separated list of IP addresses in "a.b.c.d" format
+ * allocate a cell record and fill in its name, VL server address list and
+ * allocate an anonymous key
*/
-int afs_cell_create(const char *name, char *vllist, struct afs_cell **_cell)
+static struct afs_cell *afs_cell_alloc(const char *name, char *vllist)
{
struct afs_cell *cell;
- char *next;
+ size_t namelen;
+ char keyname[4 + AFS_MAXCELLNAME + 1], *cp, *dp, *next;
int ret;
- _enter("%s", name);
+ _enter("%s,%s", name, vllist);
BUG_ON(!name); /* TODO: want to look up "this cell" in the cache */
+ namelen = strlen(name);
+ if (namelen > AFS_MAXCELLNAME)
+ return ERR_PTR(-ENAMETOOLONG);
+
/* allocate and initialise a cell record */
- cell = kmalloc(sizeof(struct afs_cell) + strlen(name) + 1, GFP_KERNEL);
+ cell = kzalloc(sizeof(struct afs_cell) + namelen + 1, GFP_KERNEL);
if (!cell) {
_leave(" = -ENOMEM");
- return -ENOMEM;
+ return ERR_PTR(-ENOMEM);
}
- down_write(&afs_cells_sem);
-
- memset(cell, 0, sizeof(struct afs_cell));
- atomic_set(&cell->usage, 0);
+ memcpy(cell->name, name, namelen);
+ cell->name[namelen] = 0;
+ atomic_set(&cell->usage, 1);
INIT_LIST_HEAD(&cell->link);
-
- rwlock_init(&cell->sv_lock);
- INIT_LIST_HEAD(&cell->sv_list);
- INIT_LIST_HEAD(&cell->sv_graveyard);
- spin_lock_init(&cell->sv_gylock);
-
+ rwlock_init(&cell->servers_lock);
+ INIT_LIST_HEAD(&cell->servers);
init_rwsem(&cell->vl_sem);
INIT_LIST_HEAD(&cell->vl_list);
- INIT_LIST_HEAD(&cell->vl_graveyard);
- spin_lock_init(&cell->vl_gylock);
-
- strcpy(cell->name,name);
+ spin_lock_init(&cell->vl_lock);
/* fill in the VL server list from the rest of the string */
- ret = -EINVAL;
do {
unsigned a, b, c, d;
@@ -96,20 +71,75 @@ int afs_cell_create(const char *name, char *vllist, struct afs_cell **_cell)
*next++ = 0;
if (sscanf(vllist, "%u.%u.%u.%u", &a, &b, &c, &d) != 4)
- goto badaddr;
+ goto bad_address;
if (a > 255 || b > 255 || c > 255 || d > 255)
- goto badaddr;
+ goto bad_address;
cell->vl_addrs[cell->vl_naddrs++].s_addr =
htonl((a << 24) | (b << 16) | (c << 8) | d);
- if (cell->vl_naddrs >= AFS_CELL_MAX_ADDRS)
- break;
+ } while (cell->vl_naddrs < AFS_CELL_MAX_ADDRS && (vllist = next));
+
+ /* create a key to represent an anonymous user */
+ memcpy(keyname, "afs@", 4);
+ dp = keyname + 4;
+ cp = cell->name;
+ do {
+ *dp++ = toupper(*cp);
+ } while (*cp++);
+ cell->anonymous_key = key_alloc(&key_type_rxrpc, keyname, 0, 0, current,
+ KEY_POS_SEARCH, KEY_ALLOC_NOT_IN_QUOTA);
+ if (IS_ERR(cell->anonymous_key)) {
+ _debug("no key");
+ ret = PTR_ERR(cell->anonymous_key);
+ goto error;
+ }
+
+ ret = key_instantiate_and_link(cell->anonymous_key, NULL, 0,
+ NULL, NULL);
+ if (ret < 0) {
+ _debug("instantiate failed");
+ goto error;
+ }
+
+ _debug("anon key %p{%x}",
+ cell->anonymous_key, key_serial(cell->anonymous_key));
+
+ _leave(" = %p", cell);
+ return cell;
+
+bad_address:
+ printk(KERN_ERR "kAFS: bad VL server IP address\n");
+ ret = -EINVAL;
+error:
+ key_put(cell->anonymous_key);
+ kfree(cell);
+ _leave(" = %d", ret);
+ return ERR_PTR(ret);
+}
+
+/*
+ * create a cell record
+ * - "name" is the name of the cell
+ * - "vllist" is a colon separated list of IP addresses in "a.b.c.d" format
+ */
+struct afs_cell *afs_cell_create(const char *name, char *vllist)
+{
+ struct afs_cell *cell;
+ int ret;
+
+ _enter("%s,%s", name, vllist);
- } while(vllist = next, vllist);
+ cell = afs_cell_alloc(name, vllist);
+ if (IS_ERR(cell)) {
+ _leave(" = %ld", PTR_ERR(cell));
+ return cell;
+ }
+
+ down_write(&afs_cells_sem);
- /* add a proc dir for this cell */
+ /* add a proc directory for this cell */
ret = afs_proc_cell_setup(cell);
if (ret < 0)
goto error;
@@ -130,31 +160,28 @@ int afs_cell_create(const char *name, char *vllist, struct afs_cell **_cell)
down_write(&afs_proc_cells_sem);
list_add_tail(&cell->proc_link, &afs_proc_cells);
up_write(&afs_proc_cells_sem);
-
- *_cell = cell;
up_write(&afs_cells_sem);
- _leave(" = 0 (%p)", cell);
- return 0;
+ _leave(" = %p", cell);
+ return cell;
- badaddr:
- printk(KERN_ERR "kAFS: bad VL server IP address: '%s'\n", vllist);
- error:
+error:
up_write(&afs_cells_sem);
+ key_put(cell->anonymous_key);
kfree(cell);
_leave(" = %d", ret);
- return ret;
-} /* end afs_cell_create() */
+ return ERR_PTR(ret);
+}
-/*****************************************************************************/
/*
- * initialise the cell database from module parameters
+ * set the root cell information
+ * - can be called with a module parameter string
+ * - can be called from a write to /proc/fs/afs/rootcell
*/
int afs_cell_init(char *rootcell)
{
struct afs_cell *old_root, *new_root;
char *cp;
- int ret;
_enter("");
@@ -162,82 +189,60 @@ int afs_cell_init(char *rootcell)
/* module is loaded with no parameters, or built statically.
* - in the future we might initialize cell DB here.
*/
- _leave(" = 0 (but no root)");
+ _leave(" = 0 [no root]");
return 0;
}
cp = strchr(rootcell, ':');
if (!cp) {
printk(KERN_ERR "kAFS: no VL server IP addresses specified\n");
- _leave(" = %d (no colon)", -EINVAL);
+ _leave(" = -EINVAL");
return -EINVAL;
}
/* allocate a cell record for the root cell */
*cp++ = 0;
- ret = afs_cell_create(rootcell, cp, &new_root);
- if (ret < 0) {
- _leave(" = %d", ret);
- return ret;
+ new_root = afs_cell_create(rootcell, cp);
+ if (IS_ERR(new_root)) {
+ _leave(" = %ld", PTR_ERR(new_root));
+ return PTR_ERR(new_root);
}
- /* as afs_put_cell() takes locks by itself, we have to do
- * a little gymnastics to be race-free.
- */
- afs_get_cell(new_root);
-
+ /* install the new cell */
write_lock(&afs_cells_lock);
- while (afs_cell_root) {
- old_root = afs_cell_root;
- afs_cell_root = NULL;
- write_unlock(&afs_cells_lock);
- afs_put_cell(old_root);
- write_lock(&afs_cells_lock);
- }
+ old_root = afs_cell_root;
afs_cell_root = new_root;
write_unlock(&afs_cells_lock);
+ afs_put_cell(old_root);
- _leave(" = %d", ret);
- return ret;
-
-} /* end afs_cell_init() */
+ _leave(" = 0");
+ return 0;
+}
-/*****************************************************************************/
/*
* lookup a cell record
*/
-int afs_cell_lookup(const char *name, unsigned namesz, struct afs_cell **_cell)
+struct afs_cell *afs_cell_lookup(const char *name, unsigned namesz)
{
struct afs_cell *cell;
- int ret;
_enter("\"%*.*s\",", namesz, namesz, name ? name : "");
- *_cell = NULL;
+ down_read(&afs_cells_sem);
+ read_lock(&afs_cells_lock);
if (name) {
/* if the cell was named, look for it in the cell record list */
- ret = -ENOENT;
- cell = NULL;
- read_lock(&afs_cells_lock);
-
list_for_each_entry(cell, &afs_cells, link) {
if (strncmp(cell->name, name, namesz) == 0) {
afs_get_cell(cell);
goto found;
}
}
- cell = NULL;
+ cell = ERR_PTR(-ENOENT);
found:
-
- read_unlock(&afs_cells_lock);
-
- if (cell)
- ret = 0;
- }
- else {
- read_lock(&afs_cells_lock);
-
+ ;
+ } else {
cell = afs_cell_root;
if (!cell) {
/* this should not happen unless user tries to mount
@@ -246,44 +251,35 @@ int afs_cell_lookup(const char *name, unsigned namesz, struct afs_cell **_cell)
* ENOENT might be "more appropriate" but they happen
* for other reasons.
*/
- ret = -EDESTADDRREQ;
- }
- else {
+ cell = ERR_PTR(-EDESTADDRREQ);
+ } else {
afs_get_cell(cell);
- ret = 0;
}
- read_unlock(&afs_cells_lock);
}
- *_cell = cell;
- _leave(" = %d (%p)", ret, cell);
- return ret;
-
-} /* end afs_cell_lookup() */
+ read_unlock(&afs_cells_lock);
+ up_read(&afs_cells_sem);
+ _leave(" = %p", cell);
+ return cell;
+}
-/*****************************************************************************/
/*
* try and get a cell record
*/
-struct afs_cell *afs_get_cell_maybe(struct afs_cell **_cell)
+struct afs_cell *afs_get_cell_maybe(struct afs_cell *cell)
{
- struct afs_cell *cell;
-
write_lock(&afs_cells_lock);
- cell = *_cell;
if (cell && !list_empty(&cell->link))
afs_get_cell(cell);
else
cell = NULL;
write_unlock(&afs_cells_lock);
-
return cell;
-} /* end afs_get_cell_maybe() */
+}
-/*****************************************************************************/
/*
* destroy a cell record
*/
@@ -294,8 +290,7 @@ void afs_put_cell(struct afs_cell *cell)
_enter("%p{%d,%s}", cell, atomic_read(&cell->usage), cell->name);
- /* sanity check */
- BUG_ON(atomic_read(&cell->usage) <= 0);
+ ASSERTCMP(atomic_read(&cell->usage), >, 0);
/* to prevent a race, the decrement and the dequeue must be effectively
* atomic */
@@ -307,36 +302,49 @@ void afs_put_cell(struct afs_cell *cell)
return;
}
+ ASSERT(list_empty(&cell->servers));
+ ASSERT(list_empty(&cell->vl_list));
+
write_unlock(&afs_cells_lock);
- BUG_ON(!list_empty(&cell->sv_list));
- BUG_ON(!list_empty(&cell->sv_graveyard));
- BUG_ON(!list_empty(&cell->vl_list));
- BUG_ON(!list_empty(&cell->vl_graveyard));
+ wake_up(&afs_cells_freeable_wq);
_leave(" [unused]");
-} /* end afs_put_cell() */
+}
-/*****************************************************************************/
/*
* destroy a cell record
+ * - must be called with the afs_cells_sem write-locked
+ * - cell->link should have been broken by the caller
*/
static void afs_cell_destroy(struct afs_cell *cell)
{
_enter("%p{%d,%s}", cell, atomic_read(&cell->usage), cell->name);
- /* to prevent a race, the decrement and the dequeue must be effectively
- * atomic */
- write_lock(&afs_cells_lock);
+ ASSERTCMP(atomic_read(&cell->usage), >=, 0);
+ ASSERT(list_empty(&cell->link));
- /* sanity check */
- BUG_ON(atomic_read(&cell->usage) != 0);
+ /* wait for everyone to stop using the cell */
+ if (atomic_read(&cell->usage) > 0) {
+ DECLARE_WAITQUEUE(myself, current);
- list_del_init(&cell->link);
+ _debug("wait for cell %s", cell->name);
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ add_wait_queue(&afs_cells_freeable_wq, &myself);
- write_unlock(&afs_cells_lock);
+ while (atomic_read(&cell->usage) > 0) {
+ schedule();
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ }
- down_write(&afs_cells_sem);
+ remove_wait_queue(&afs_cells_freeable_wq, &myself);
+ set_current_state(TASK_RUNNING);
+ }
+
+ _debug("cell dead");
+ ASSERTCMP(atomic_read(&cell->usage), ==, 0);
+ ASSERT(list_empty(&cell->servers));
+ ASSERT(list_empty(&cell->vl_list));
afs_proc_cell_remove(cell);
@@ -348,104 +356,26 @@ static void afs_cell_destroy(struct afs_cell *cell)
cachefs_relinquish_cookie(cell->cache, 0);
#endif
- up_write(&afs_cells_sem);
-
- BUG_ON(!list_empty(&cell->sv_list));
- BUG_ON(!list_empty(&cell->sv_graveyard));
- BUG_ON(!list_empty(&cell->vl_list));
- BUG_ON(!list_empty(&cell->vl_graveyard));
-
- /* finish cleaning up the cell */
+ key_put(cell->anonymous_key);
kfree(cell);
_leave(" [destroyed]");
-} /* end afs_cell_destroy() */
-
-/*****************************************************************************/
-/*
- * lookup the server record corresponding to an Rx RPC peer
- */
-int afs_server_find_by_peer(const struct rxrpc_peer *peer,
- struct afs_server **_server)
-{
- struct afs_server *server;
- struct afs_cell *cell;
-
- _enter("%p{a=%08x},", peer, ntohl(peer->addr.s_addr));
-
- /* search the cell list */
- read_lock(&afs_cells_lock);
-
- list_for_each_entry(cell, &afs_cells, link) {
-
- _debug("? cell %s",cell->name);
-
- write_lock(&cell->sv_lock);
-
- /* check the active list */
- list_for_each_entry(server, &cell->sv_list, link) {
- _debug("?? server %08x", ntohl(server->addr.s_addr));
-
- if (memcmp(&server->addr, &peer->addr,
- sizeof(struct in_addr)) == 0)
- goto found_server;
- }
+}
- /* check the inactive list */
- spin_lock(&cell->sv_gylock);
- list_for_each_entry(server, &cell->sv_graveyard, link) {
- _debug("?? dead server %08x",
- ntohl(server->addr.s_addr));
-
- if (memcmp(&server->addr, &peer->addr,
- sizeof(struct in_addr)) == 0)
- goto found_dead_server;
- }
- spin_unlock(&cell->sv_gylock);
-
- write_unlock(&cell->sv_lock);
- }
- read_unlock(&afs_cells_lock);
-
- _leave(" = -ENOENT");
- return -ENOENT;
-
- /* we found it in the graveyard - resurrect it */
- found_dead_server:
- list_move_tail(&server->link, &cell->sv_list);
- afs_get_server(server);
- afs_kafstimod_del_timer(&server->timeout);
- spin_unlock(&cell->sv_gylock);
- goto success;
-
- /* we found it - increment its ref count and return it */
- found_server:
- afs_get_server(server);
-
- success:
- write_unlock(&cell->sv_lock);
- read_unlock(&afs_cells_lock);
-
- *_server = server;
- _leave(" = 0 (s=%p c=%p)", server, cell);
- return 0;
-
-} /* end afs_server_find_by_peer() */
-
-/*****************************************************************************/
/*
* purge in-memory cell database on module unload or afs_init() failure
* - the timeout daemon is stopped before calling this
*/
void afs_cell_purge(void)
{
- struct afs_vlocation *vlocation;
struct afs_cell *cell;
_enter("");
afs_put_cell(afs_cell_root);
+ down_write(&afs_cells_sem);
+
while (!list_empty(&afs_cells)) {
cell = NULL;
@@ -464,104 +394,11 @@ void afs_cell_purge(void)
_debug("PURGING CELL %s (%d)",
cell->name, atomic_read(&cell->usage));
- BUG_ON(!list_empty(&cell->sv_list));
- BUG_ON(!list_empty(&cell->vl_list));
-
- /* purge the cell's VL graveyard list */
- _debug(" - clearing VL graveyard");
-
- spin_lock(&cell->vl_gylock);
-
- while (!list_empty(&cell->vl_graveyard)) {
- vlocation = list_entry(cell->vl_graveyard.next,
- struct afs_vlocation,
- link);
- list_del_init(&vlocation->link);
-
- afs_kafstimod_del_timer(&vlocation->timeout);
-
- spin_unlock(&cell->vl_gylock);
-
- afs_vlocation_do_timeout(vlocation);
- /* TODO: race if move to use krxtimod instead
- * of kafstimod */
-
- spin_lock(&cell->vl_gylock);
- }
-
- spin_unlock(&cell->vl_gylock);
-
- /* purge the cell's server graveyard list */
- _debug(" - clearing server graveyard");
-
- spin_lock(&cell->sv_gylock);
-
- while (!list_empty(&cell->sv_graveyard)) {
- struct afs_server *server;
-
- server = list_entry(cell->sv_graveyard.next,
- struct afs_server, link);
- list_del_init(&server->link);
-
- afs_kafstimod_del_timer(&server->timeout);
-
- spin_unlock(&cell->sv_gylock);
-
- afs_server_do_timeout(server);
-
- spin_lock(&cell->sv_gylock);
- }
-
- spin_unlock(&cell->sv_gylock);
-
/* now the cell should be left with no references */
afs_cell_destroy(cell);
}
}
+ up_write(&afs_cells_sem);
_leave("");
-} /* end afs_cell_purge() */
-
-/*****************************************************************************/
-/*
- * match a cell record obtained from the cache
- */
-#ifdef AFS_CACHING_SUPPORT
-static cachefs_match_val_t afs_cell_cache_match(void *target,
- const void *entry)
-{
- const struct afs_cache_cell *ccell = entry;
- struct afs_cell *cell = target;
-
- _enter("{%s},{%s}", ccell->name, cell->name);
-
- if (strncmp(ccell->name, cell->name, sizeof(ccell->name)) == 0) {
- _leave(" = SUCCESS");
- return CACHEFS_MATCH_SUCCESS;
- }
-
- _leave(" = FAILED");
- return CACHEFS_MATCH_FAILED;
-} /* end afs_cell_cache_match() */
-#endif
-
-/*****************************************************************************/
-/*
- * update a cell record in the cache
- */
-#ifdef AFS_CACHING_SUPPORT
-static void afs_cell_cache_update(void *source, void *entry)
-{
- struct afs_cache_cell *ccell = entry;
- struct afs_cell *cell = source;
-
- _enter("%p,%p", source, entry);
-
- strncpy(ccell->name, cell->name, sizeof(ccell->name));
-
- memcpy(ccell->vl_servers,
- cell->vl_addrs,
- min(sizeof(ccell->vl_servers), sizeof(cell->vl_addrs)));
-
-} /* end afs_cell_cache_update() */
-#endif
+}
diff --git a/fs/afs/cell.h b/fs/afs/cell.h
deleted file mode 100644
index 48349108fb0..00000000000
--- a/fs/afs/cell.h
+++ /dev/null
@@ -1,78 +0,0 @@
-/* cell.h: AFS cell record
- *
- * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#ifndef _LINUX_AFS_CELL_H
-#define _LINUX_AFS_CELL_H
-
-#include "types.h"
-#include "cache.h"
-
-#define AFS_CELL_MAX_ADDRS 15
-
-extern volatile int afs_cells_being_purged; /* T when cells are being purged by rmmod */
-
-/*****************************************************************************/
-/*
- * entry in the cached cell catalogue
- */
-struct afs_cache_cell
-{
- char name[64]; /* cell name (padded with NULs) */
- struct in_addr vl_servers[15]; /* cached cell VL servers */
-};
-
-/*****************************************************************************/
-/*
- * AFS cell record
- */
-struct afs_cell
-{
- atomic_t usage;
- struct list_head link; /* main cell list link */
- struct list_head proc_link; /* /proc cell list link */
- struct proc_dir_entry *proc_dir; /* /proc dir for this cell */
-#ifdef AFS_CACHING_SUPPORT
- struct cachefs_cookie *cache; /* caching cookie */
-#endif
-
- /* server record management */
- rwlock_t sv_lock; /* active server list lock */
- struct list_head sv_list; /* active server list */
- struct list_head sv_graveyard; /* inactive server list */
- spinlock_t sv_gylock; /* inactive server list lock */
-
- /* volume location record management */
- struct rw_semaphore vl_sem; /* volume management serialisation semaphore */
- struct list_head vl_list; /* cell's active VL record list */
- struct list_head vl_graveyard; /* cell's inactive VL record list */
- spinlock_t vl_gylock; /* graveyard lock */
- unsigned short vl_naddrs; /* number of VL servers in addr list */
- unsigned short vl_curr_svix; /* current server index */
- struct in_addr vl_addrs[AFS_CELL_MAX_ADDRS]; /* cell VL server addresses */
-
- char name[0]; /* cell name - must go last */
-};
-
-extern int afs_cell_init(char *rootcell);
-
-extern int afs_cell_create(const char *name, char *vllist, struct afs_cell **_cell);
-
-extern int afs_cell_lookup(const char *name, unsigned nmsize, struct afs_cell **_cell);
-
-#define afs_get_cell(C) do { atomic_inc(&(C)->usage); } while(0)
-
-extern struct afs_cell *afs_get_cell_maybe(struct afs_cell **_cell);
-
-extern void afs_put_cell(struct afs_cell *cell);
-
-extern void afs_cell_purge(void);
-
-#endif /* _LINUX_AFS_CELL_H */
diff --git a/fs/afs/cmservice.c b/fs/afs/cmservice.c
index 3d097fddcb7..d5b2ad6575b 100644
--- a/fs/afs/cmservice.c
+++ b/fs/afs/cmservice.c
@@ -1,4 +1,4 @@
-/* cmservice.c: AFS Cache Manager Service
+/* AFS Cache Manager Service
*
* Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
@@ -12,641 +12,464 @@
#include <linux/module.h>
#include <linux/init.h>
#include <linux/sched.h>
-#include <linux/completion.h>
-#include "server.h"
-#include "cell.h"
-#include "transport.h"
-#include <rxrpc/rxrpc.h>
-#include <rxrpc/transport.h>
-#include <rxrpc/connection.h>
-#include <rxrpc/call.h>
-#include "cmservice.h"
+#include <linux/ip.h>
#include "internal.h"
+#include "afs_cm.h"
-static unsigned afscm_usage; /* AFS cache manager usage count */
-static struct rw_semaphore afscm_sem; /* AFS cache manager start/stop semaphore */
-
-static int afscm_new_call(struct rxrpc_call *call);
-static void afscm_attention(struct rxrpc_call *call);
-static void afscm_error(struct rxrpc_call *call);
-static void afscm_aemap(struct rxrpc_call *call);
-
-static void _SRXAFSCM_CallBack(struct rxrpc_call *call);
-static void _SRXAFSCM_InitCallBackState(struct rxrpc_call *call);
-static void _SRXAFSCM_Probe(struct rxrpc_call *call);
-
-typedef void (*_SRXAFSCM_xxxx_t)(struct rxrpc_call *call);
-
-static const struct rxrpc_operation AFSCM_ops[] = {
- {
- .id = 204,
- .asize = RXRPC_APP_MARK_EOF,
- .name = "CallBack",
- .user = _SRXAFSCM_CallBack,
- },
- {
- .id = 205,
- .asize = RXRPC_APP_MARK_EOF,
- .name = "InitCallBackState",
- .user = _SRXAFSCM_InitCallBackState,
- },
- {
- .id = 206,
- .asize = RXRPC_APP_MARK_EOF,
- .name = "Probe",
- .user = _SRXAFSCM_Probe,
- },
-#if 0
- {
- .id = 207,
- .asize = RXRPC_APP_MARK_EOF,
- .name = "GetLock",
- .user = _SRXAFSCM_GetLock,
- },
- {
- .id = 208,
- .asize = RXRPC_APP_MARK_EOF,
- .name = "GetCE",
- .user = _SRXAFSCM_GetCE,
- },
- {
- .id = 209,
- .asize = RXRPC_APP_MARK_EOF,
- .name = "GetXStatsVersion",
- .user = _SRXAFSCM_GetXStatsVersion,
- },
- {
- .id = 210,
- .asize = RXRPC_APP_MARK_EOF,
- .name = "GetXStats",
- .user = _SRXAFSCM_GetXStats,
- }
-#endif
-};
+struct workqueue_struct *afs_cm_workqueue;
-static struct rxrpc_service AFSCM_service = {
- .name = "AFS/CM",
- .owner = THIS_MODULE,
- .link = LIST_HEAD_INIT(AFSCM_service.link),
- .new_call = afscm_new_call,
- .service_id = 1,
- .attn_func = afscm_attention,
- .error_func = afscm_error,
- .aemap_func = afscm_aemap,
- .ops_begin = &AFSCM_ops[0],
- .ops_end = &AFSCM_ops[ARRAY_SIZE(AFSCM_ops)],
-};
+static int afs_deliver_cb_init_call_back_state(struct afs_call *,
+ struct sk_buff *, bool);
+static int afs_deliver_cb_init_call_back_state3(struct afs_call *,
+ struct sk_buff *, bool);
+static int afs_deliver_cb_probe(struct afs_call *, struct sk_buff *, bool);
+static int afs_deliver_cb_callback(struct afs_call *, struct sk_buff *, bool);
+static int afs_deliver_cb_get_capabilities(struct afs_call *, struct sk_buff *,
+ bool);
+static void afs_cm_destructor(struct afs_call *);
-static DECLARE_COMPLETION(kafscmd_alive);
-static DECLARE_COMPLETION(kafscmd_dead);
-static DECLARE_WAIT_QUEUE_HEAD(kafscmd_sleepq);
-static LIST_HEAD(kafscmd_attention_list);
-static LIST_HEAD(afscm_calls);
-static DEFINE_SPINLOCK(afscm_calls_lock);
-static DEFINE_SPINLOCK(kafscmd_attention_lock);
-static int kafscmd_die;
-
-/*****************************************************************************/
/*
- * AFS Cache Manager kernel thread
+ * CB.CallBack operation type
*/
-static int kafscmd(void *arg)
-{
- DECLARE_WAITQUEUE(myself, current);
-
- struct rxrpc_call *call;
- _SRXAFSCM_xxxx_t func;
- int die;
-
- printk(KERN_INFO "kAFS: Started kafscmd %d\n", current->pid);
-
- daemonize("kafscmd");
-
- complete(&kafscmd_alive);
-
- /* loop around looking for things to attend to */
- do {
- if (list_empty(&kafscmd_attention_list)) {
- set_current_state(TASK_INTERRUPTIBLE);
- add_wait_queue(&kafscmd_sleepq, &myself);
-
- for (;;) {
- set_current_state(TASK_INTERRUPTIBLE);
- if (!list_empty(&kafscmd_attention_list) ||
- signal_pending(current) ||
- kafscmd_die)
- break;
-
- schedule();
- }
-
- remove_wait_queue(&kafscmd_sleepq, &myself);
- set_current_state(TASK_RUNNING);
- }
-
- die = kafscmd_die;
-
- /* dequeue the next call requiring attention */
- call = NULL;
- spin_lock(&kafscmd_attention_lock);
-
- if (!list_empty(&kafscmd_attention_list)) {
- call = list_entry(kafscmd_attention_list.next,
- struct rxrpc_call,
- app_attn_link);
- list_del_init(&call->app_attn_link);
- die = 0;
- }
-
- spin_unlock(&kafscmd_attention_lock);
-
- if (call) {
- /* act upon it */
- _debug("@@@ Begin Attend Call %p", call);
-
- func = call->app_user;
- if (func)
- func(call);
-
- rxrpc_put_call(call);
-
- _debug("@@@ End Attend Call %p", call);
- }
-
- } while(!die);
-
- /* and that's all */
- complete_and_exit(&kafscmd_dead, 0);
-
-} /* end kafscmd() */
+static const struct afs_call_type afs_SRXCBCallBack = {
+ .name = "CB.CallBack",
+ .deliver = afs_deliver_cb_callback,
+ .abort_to_error = afs_abort_to_error,
+ .destructor = afs_cm_destructor,
+};
-/*****************************************************************************/
/*
- * handle a call coming in to the cache manager
- * - if I want to keep the call, I must increment its usage count
- * - the return value will be negated and passed back in an abort packet if
- * non-zero
- * - serialised by virtue of there only being one krxiod
+ * CB.InitCallBackState operation type
*/
-static int afscm_new_call(struct rxrpc_call *call)
-{
- _enter("%p{cid=%u u=%d}",
- call, ntohl(call->call_id), atomic_read(&call->usage));
-
- rxrpc_get_call(call);
-
- /* add to my current call list */
- spin_lock(&afscm_calls_lock);
- list_add(&call->app_link,&afscm_calls);
- spin_unlock(&afscm_calls_lock);
-
- _leave(" = 0");
- return 0;
-
-} /* end afscm_new_call() */
+static const struct afs_call_type afs_SRXCBInitCallBackState = {
+ .name = "CB.InitCallBackState",
+ .deliver = afs_deliver_cb_init_call_back_state,
+ .abort_to_error = afs_abort_to_error,
+ .destructor = afs_cm_destructor,
+};
-/*****************************************************************************/
/*
- * queue on the kafscmd queue for attention
+ * CB.InitCallBackState3 operation type
*/
-static void afscm_attention(struct rxrpc_call *call)
-{
- _enter("%p{cid=%u u=%d}",
- call, ntohl(call->call_id), atomic_read(&call->usage));
-
- spin_lock(&kafscmd_attention_lock);
-
- if (list_empty(&call->app_attn_link)) {
- list_add_tail(&call->app_attn_link, &kafscmd_attention_list);
- rxrpc_get_call(call);
- }
-
- spin_unlock(&kafscmd_attention_lock);
-
- wake_up(&kafscmd_sleepq);
-
- _leave(" {u=%d}", atomic_read(&call->usage));
-} /* end afscm_attention() */
+static const struct afs_call_type afs_SRXCBInitCallBackState3 = {
+ .name = "CB.InitCallBackState3",
+ .deliver = afs_deliver_cb_init_call_back_state3,
+ .abort_to_error = afs_abort_to_error,
+ .destructor = afs_cm_destructor,
+};
-/*****************************************************************************/
/*
- * handle my call being aborted
- * - clean up, dequeue and put my ref to the call
+ * CB.Probe operation type
*/
-static void afscm_error(struct rxrpc_call *call)
-{
- int removed;
-
- _enter("%p{est=%s ac=%u er=%d}",
- call,
- rxrpc_call_error_states[call->app_err_state],
- call->app_abort_code,
- call->app_errno);
-
- spin_lock(&kafscmd_attention_lock);
-
- if (list_empty(&call->app_attn_link)) {
- list_add_tail(&call->app_attn_link, &kafscmd_attention_list);
- rxrpc_get_call(call);
- }
-
- spin_unlock(&kafscmd_attention_lock);
-
- removed = 0;
- spin_lock(&afscm_calls_lock);
- if (!list_empty(&call->app_link)) {
- list_del_init(&call->app_link);
- removed = 1;
- }
- spin_unlock(&afscm_calls_lock);
-
- if (removed)
- rxrpc_put_call(call);
-
- wake_up(&kafscmd_sleepq);
+static const struct afs_call_type afs_SRXCBProbe = {
+ .name = "CB.Probe",
+ .deliver = afs_deliver_cb_probe,
+ .abort_to_error = afs_abort_to_error,
+ .destructor = afs_cm_destructor,
+};
- _leave("");
-} /* end afscm_error() */
+/*
+ * CB.GetCapabilities operation type
+ */
+static const struct afs_call_type afs_SRXCBGetCapabilites = {
+ .name = "CB.GetCapabilities",
+ .deliver = afs_deliver_cb_get_capabilities,
+ .abort_to_error = afs_abort_to_error,
+ .destructor = afs_cm_destructor,
+};
-/*****************************************************************************/
/*
- * map afs abort codes to/from Linux error codes
- * - called with call->lock held
+ * route an incoming cache manager call
+ * - return T if supported, F if not
*/
-static void afscm_aemap(struct rxrpc_call *call)
+bool afs_cm_incoming_call(struct afs_call *call)
{
- switch (call->app_err_state) {
- case RXRPC_ESTATE_LOCAL_ABORT:
- call->app_abort_code = -call->app_errno;
- break;
- case RXRPC_ESTATE_PEER_ABORT:
- call->app_errno = -ECONNABORTED;
- break;
+ u32 operation_id = ntohl(call->operation_ID);
+
+ _enter("{CB.OP %u}", operation_id);
+
+ switch (operation_id) {
+ case CBCallBack:
+ call->type = &afs_SRXCBCallBack;
+ return true;
+ case CBInitCallBackState:
+ call->type = &afs_SRXCBInitCallBackState;
+ return true;
+ case CBInitCallBackState3:
+ call->type = &afs_SRXCBInitCallBackState3;
+ return true;
+ case CBProbe:
+ call->type = &afs_SRXCBProbe;
+ return true;
+ case CBGetCapabilities:
+ call->type = &afs_SRXCBGetCapabilites;
+ return true;
default:
- break;
+ return false;
}
-} /* end afscm_aemap() */
+}
-/*****************************************************************************/
/*
- * start the cache manager service if not already started
+ * clean up a cache manager call
*/
-int afscm_start(void)
+static void afs_cm_destructor(struct afs_call *call)
{
- int ret;
-
- down_write(&afscm_sem);
- if (!afscm_usage) {
- ret = kernel_thread(kafscmd, NULL, 0);
- if (ret < 0)
- goto out;
-
- wait_for_completion(&kafscmd_alive);
-
- ret = rxrpc_add_service(afs_transport, &AFSCM_service);
- if (ret < 0)
- goto kill;
-
- afs_kafstimod_add_timer(&afs_mntpt_expiry_timer,
- afs_mntpt_expiry_timeout * HZ);
- }
-
- afscm_usage++;
- up_write(&afscm_sem);
-
- return 0;
-
- kill:
- kafscmd_die = 1;
- wake_up(&kafscmd_sleepq);
- wait_for_completion(&kafscmd_dead);
-
- out:
- up_write(&afscm_sem);
- return ret;
+ _enter("");
-} /* end afscm_start() */
+ afs_put_server(call->server);
+ call->server = NULL;
+ kfree(call->buffer);
+ call->buffer = NULL;
+}
-/*****************************************************************************/
/*
- * stop the cache manager service
+ * allow the fileserver to see if the cache manager is still alive
*/
-void afscm_stop(void)
+static void SRXAFSCB_CallBack(struct work_struct *work)
{
- struct rxrpc_call *call;
+ struct afs_call *call = container_of(work, struct afs_call, work);
- down_write(&afscm_sem);
+ _enter("");
- BUG_ON(afscm_usage == 0);
- afscm_usage--;
+ /* be sure to send the reply *before* attempting to spam the AFS server
+ * with FSFetchStatus requests on the vnodes with broken callbacks lest
+ * the AFS server get into a vicious cycle of trying to break further
+ * callbacks because it hadn't received completion of the CBCallBack op
+ * yet */
+ afs_send_empty_reply(call);
- if (afscm_usage == 0) {
- /* don't want more incoming calls */
- rxrpc_del_service(afs_transport, &AFSCM_service);
-
- /* abort any calls I've still got open (the afscm_error() will
- * dequeue them) */
- spin_lock(&afscm_calls_lock);
- while (!list_empty(&afscm_calls)) {
- call = list_entry(afscm_calls.next,
- struct rxrpc_call,
- app_link);
+ afs_break_callbacks(call->server, call->count, call->request);
+ _leave("");
+}
- list_del_init(&call->app_link);
- rxrpc_get_call(call);
- spin_unlock(&afscm_calls_lock);
+/*
+ * deliver request data to a CB.CallBack call
+ */
+static int afs_deliver_cb_callback(struct afs_call *call, struct sk_buff *skb,
+ bool last)
+{
+ struct afs_callback *cb;
+ struct afs_server *server;
+ struct in_addr addr;
+ __be32 *bp;
+ u32 tmp;
+ int ret, loop;
+
+ _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
+
+ switch (call->unmarshall) {
+ case 0:
+ call->offset = 0;
+ call->unmarshall++;
+
+ /* extract the FID array and its count in two steps */
+ case 1:
+ _debug("extract FID count");
+ ret = afs_extract_data(call, skb, last, &call->tmp, 4);
+ switch (ret) {
+ case 0: break;
+ case -EAGAIN: return 0;
+ default: return ret;
+ }
- rxrpc_call_abort(call, -ESRCH); /* abort, dequeue and
- * put */
+ call->count = ntohl(call->tmp);
+ _debug("FID count: %u", call->count);
+ if (call->count > AFSCBMAX)
+ return -EBADMSG;
+
+ call->buffer = kmalloc(call->count * 3 * 4, GFP_KERNEL);
+ if (!call->buffer)
+ return -ENOMEM;
+ call->offset = 0;
+ call->unmarshall++;
+
+ case 2:
+ _debug("extract FID array");
+ ret = afs_extract_data(call, skb, last, call->buffer,
+ call->count * 3 * 4);
+ switch (ret) {
+ case 0: break;
+ case -EAGAIN: return 0;
+ default: return ret;
+ }
- _debug("nuking active call %08x.%d",
- ntohl(call->conn->conn_id),
- ntohl(call->call_id));
- rxrpc_put_call(call);
- rxrpc_put_call(call);
+ _debug("unmarshall FID array");
+ call->request = kcalloc(call->count,
+ sizeof(struct afs_callback),
+ GFP_KERNEL);
+ if (!call->request)
+ return -ENOMEM;
+
+ cb = call->request;
+ bp = call->buffer;
+ for (loop = call->count; loop > 0; loop--, cb++) {
+ cb->fid.vid = ntohl(*bp++);
+ cb->fid.vnode = ntohl(*bp++);
+ cb->fid.unique = ntohl(*bp++);
+ cb->type = AFSCM_CB_UNTYPED;
+ }
- spin_lock(&afscm_calls_lock);
+ call->offset = 0;
+ call->unmarshall++;
+
+ /* extract the callback array and its count in two steps */
+ case 3:
+ _debug("extract CB count");
+ ret = afs_extract_data(call, skb, last, &call->tmp, 4);
+ switch (ret) {
+ case 0: break;
+ case -EAGAIN: return 0;
+ default: return ret;
}
- spin_unlock(&afscm_calls_lock);
- /* get rid of my daemon */
- kafscmd_die = 1;
- wake_up(&kafscmd_sleepq);
- wait_for_completion(&kafscmd_dead);
+ tmp = ntohl(call->tmp);
+ _debug("CB count: %u", tmp);
+ if (tmp != call->count && tmp != 0)
+ return -EBADMSG;
+ call->offset = 0;
+ call->unmarshall++;
+ if (tmp == 0)
+ goto empty_cb_array;
+
+ case 4:
+ _debug("extract CB array");
+ ret = afs_extract_data(call, skb, last, call->request,
+ call->count * 3 * 4);
+ switch (ret) {
+ case 0: break;
+ case -EAGAIN: return 0;
+ default: return ret;
+ }
- /* dispose of any calls waiting for attention */
- spin_lock(&kafscmd_attention_lock);
- while (!list_empty(&kafscmd_attention_list)) {
- call = list_entry(kafscmd_attention_list.next,
- struct rxrpc_call,
- app_attn_link);
+ _debug("unmarshall CB array");
+ cb = call->request;
+ bp = call->buffer;
+ for (loop = call->count; loop > 0; loop--, cb++) {
+ cb->version = ntohl(*bp++);
+ cb->expiry = ntohl(*bp++);
+ cb->type = ntohl(*bp++);
+ }
- list_del_init(&call->app_attn_link);
- spin_unlock(&kafscmd_attention_lock);
+ empty_cb_array:
+ call->offset = 0;
+ call->unmarshall++;
- rxrpc_put_call(call);
+ case 5:
+ _debug("trailer");
+ if (skb->len != 0)
+ return -EBADMSG;
+ break;
+ }
- spin_lock(&kafscmd_attention_lock);
- }
- spin_unlock(&kafscmd_attention_lock);
+ if (!last)
+ return 0;
- afs_kafstimod_del_timer(&afs_mntpt_expiry_timer);
- }
+ call->state = AFS_CALL_REPLYING;
- up_write(&afscm_sem);
+ /* we'll need the file server record as that tells us which set of
+ * vnodes to operate upon */
+ memcpy(&addr, &ip_hdr(skb)->saddr, 4);
+ server = afs_find_server(&addr);
+ if (!server)
+ return -ENOTCONN;
+ call->server = server;
-} /* end afscm_stop() */
+ INIT_WORK(&call->work, SRXAFSCB_CallBack);
+ schedule_work(&call->work);
+ return 0;
+}
-/*****************************************************************************/
/*
- * handle the fileserver breaking a set of callbacks
+ * allow the fileserver to request callback state (re-)initialisation
*/
-static void _SRXAFSCM_CallBack(struct rxrpc_call *call)
+static void SRXAFSCB_InitCallBackState(struct work_struct *work)
{
- struct afs_server *server;
- size_t count, qty, tmp;
- int ret = 0, removed;
-
- _enter("%p{acs=%s}", call, rxrpc_call_states[call->app_call_state]);
-
- server = afs_server_get_from_peer(call->conn->peer);
-
- switch (call->app_call_state) {
- /* we've received the last packet
- * - drain all the data from the call and send the reply
- */
- case RXRPC_CSTATE_SRVR_GOT_ARGS:
- ret = -EBADMSG;
- qty = call->app_ready_qty;
- if (qty < 8 || qty > 50 * (6 * 4) + 8)
- break;
-
- {
- struct afs_callback *cb, *pcb;
- int loop;
- __be32 *fp, *bp;
-
- fp = rxrpc_call_alloc_scratch(call, qty);
-
- /* drag the entire argument block out to the scratch
- * space */
- ret = rxrpc_call_read_data(call, fp, qty, 0);
- if (ret < 0)
- break;
-
- /* and unmarshall the parameter block */
- ret = -EBADMSG;
- count = ntohl(*fp++);
- if (count>AFSCBMAX ||
- (count * (3 * 4) + 8 != qty &&
- count * (6 * 4) + 8 != qty))
- break;
-
- bp = fp + count*3;
- tmp = ntohl(*bp++);
- if (tmp > 0 && tmp != count)
- break;
- if (tmp == 0)
- bp = NULL;
-
- pcb = cb = rxrpc_call_alloc_scratch_s(
- call, struct afs_callback);
-
- for (loop = count - 1; loop >= 0; loop--) {
- pcb->fid.vid = ntohl(*fp++);
- pcb->fid.vnode = ntohl(*fp++);
- pcb->fid.unique = ntohl(*fp++);
- if (bp) {
- pcb->version = ntohl(*bp++);
- pcb->expiry = ntohl(*bp++);
- pcb->type = ntohl(*bp++);
- }
- else {
- pcb->version = 0;
- pcb->expiry = 0;
- pcb->type = AFSCM_CB_UNTYPED;
- }
- pcb++;
- }
-
- /* invoke the actual service routine */
- ret = SRXAFSCM_CallBack(server, count, cb);
- if (ret < 0)
- break;
- }
+ struct afs_call *call = container_of(work, struct afs_call, work);
- /* send the reply */
- ret = rxrpc_call_write_data(call, 0, NULL, RXRPC_LAST_PACKET,
- GFP_KERNEL, 0, &count);
- if (ret < 0)
- break;
- break;
-
- /* operation complete */
- case RXRPC_CSTATE_COMPLETE:
- call->app_user = NULL;
- removed = 0;
- spin_lock(&afscm_calls_lock);
- if (!list_empty(&call->app_link)) {
- list_del_init(&call->app_link);
- removed = 1;
- }
- spin_unlock(&afscm_calls_lock);
+ _enter("{%p}", call->server);
- if (removed)
- rxrpc_put_call(call);
- break;
+ afs_init_callback_state(call->server);
+ afs_send_empty_reply(call);
+ _leave("");
+}
- /* operation terminated on error */
- case RXRPC_CSTATE_ERROR:
- call->app_user = NULL;
- break;
+/*
+ * deliver request data to a CB.InitCallBackState call
+ */
+static int afs_deliver_cb_init_call_back_state(struct afs_call *call,
+ struct sk_buff *skb,
+ bool last)
+{
+ struct afs_server *server;
+ struct in_addr addr;
- default:
- break;
- }
+ _enter(",{%u},%d", skb->len, last);
- if (ret < 0)
- rxrpc_call_abort(call, ret);
+ if (skb->len > 0)
+ return -EBADMSG;
+ if (!last)
+ return 0;
- afs_put_server(server);
+ /* no unmarshalling required */
+ call->state = AFS_CALL_REPLYING;
- _leave(" = %d", ret);
+ /* we'll need the file server record as that tells us which set of
+ * vnodes to operate upon */
+ memcpy(&addr, &ip_hdr(skb)->saddr, 4);
+ server = afs_find_server(&addr);
+ if (!server)
+ return -ENOTCONN;
+ call->server = server;
-} /* end _SRXAFSCM_CallBack() */
+ INIT_WORK(&call->work, SRXAFSCB_InitCallBackState);
+ schedule_work(&call->work);
+ return 0;
+}
-/*****************************************************************************/
/*
- * handle the fileserver asking us to initialise our callback state
+ * deliver request data to a CB.InitCallBackState3 call
*/
-static void _SRXAFSCM_InitCallBackState(struct rxrpc_call *call)
+static int afs_deliver_cb_init_call_back_state3(struct afs_call *call,
+ struct sk_buff *skb,
+ bool last)
{
struct afs_server *server;
- size_t count;
- int ret = 0, removed;
+ struct in_addr addr;
- _enter("%p{acs=%s}", call, rxrpc_call_states[call->app_call_state]);
+ _enter(",{%u},%d", skb->len, last);
- server = afs_server_get_from_peer(call->conn->peer);
+ if (!last)
+ return 0;
- switch (call->app_call_state) {
- /* we've received the last packet - drain all the data from the
- * call */
- case RXRPC_CSTATE_SRVR_GOT_ARGS:
- /* shouldn't be any args */
- ret = -EBADMSG;
- break;
-
- /* send the reply when asked for it */
- case RXRPC_CSTATE_SRVR_SND_REPLY:
- /* invoke the actual service routine */
- ret = SRXAFSCM_InitCallBackState(server);
- if (ret < 0)
- break;
-
- ret = rxrpc_call_write_data(call, 0, NULL, RXRPC_LAST_PACKET,
- GFP_KERNEL, 0, &count);
- if (ret < 0)
- break;
- break;
+ /* no unmarshalling required */
+ call->state = AFS_CALL_REPLYING;
- /* operation complete */
- case RXRPC_CSTATE_COMPLETE:
- call->app_user = NULL;
- removed = 0;
- spin_lock(&afscm_calls_lock);
- if (!list_empty(&call->app_link)) {
- list_del_init(&call->app_link);
- removed = 1;
- }
- spin_unlock(&afscm_calls_lock);
+ /* we'll need the file server record as that tells us which set of
+ * vnodes to operate upon */
+ memcpy(&addr, &ip_hdr(skb)->saddr, 4);
+ server = afs_find_server(&addr);
+ if (!server)
+ return -ENOTCONN;
+ call->server = server;
- if (removed)
- rxrpc_put_call(call);
- break;
-
- /* operation terminated on error */
- case RXRPC_CSTATE_ERROR:
- call->app_user = NULL;
- break;
-
- default:
- break;
- }
-
- if (ret < 0)
- rxrpc_call_abort(call, ret);
-
- afs_put_server(server);
+ INIT_WORK(&call->work, SRXAFSCB_InitCallBackState);
+ schedule_work(&call->work);
+ return 0;
+}
- _leave(" = %d", ret);
+/*
+ * allow the fileserver to see if the cache manager is still alive
+ */
+static void SRXAFSCB_Probe(struct work_struct *work)
+{
+ struct afs_call *call = container_of(work, struct afs_call, work);
-} /* end _SRXAFSCM_InitCallBackState() */
+ _enter("");
+ afs_send_empty_reply(call);
+ _leave("");
+}
-/*****************************************************************************/
/*
- * handle a probe from a fileserver
+ * deliver request data to a CB.Probe call
*/
-static void _SRXAFSCM_Probe(struct rxrpc_call *call)
+static int afs_deliver_cb_probe(struct afs_call *call, struct sk_buff *skb,
+ bool last)
{
- struct afs_server *server;
- size_t count;
- int ret = 0, removed;
-
- _enter("%p{acs=%s}", call, rxrpc_call_states[call->app_call_state]);
+ _enter(",{%u},%d", skb->len, last);
- server = afs_server_get_from_peer(call->conn->peer);
+ if (skb->len > 0)
+ return -EBADMSG;
+ if (!last)
+ return 0;
- switch (call->app_call_state) {
- /* we've received the last packet - drain all the data from the
- * call */
- case RXRPC_CSTATE_SRVR_GOT_ARGS:
- /* shouldn't be any args */
- ret = -EBADMSG;
- break;
+ /* no unmarshalling required */
+ call->state = AFS_CALL_REPLYING;
- /* send the reply when asked for it */
- case RXRPC_CSTATE_SRVR_SND_REPLY:
- /* invoke the actual service routine */
- ret = SRXAFSCM_Probe(server);
- if (ret < 0)
- break;
-
- ret = rxrpc_call_write_data(call, 0, NULL, RXRPC_LAST_PACKET,
- GFP_KERNEL, 0, &count);
- if (ret < 0)
- break;
- break;
+ INIT_WORK(&call->work, SRXAFSCB_Probe);
+ schedule_work(&call->work);
+ return 0;
+}
- /* operation complete */
- case RXRPC_CSTATE_COMPLETE:
- call->app_user = NULL;
- removed = 0;
- spin_lock(&afscm_calls_lock);
- if (!list_empty(&call->app_link)) {
- list_del_init(&call->app_link);
- removed = 1;
+/*
+ * allow the fileserver to ask about the cache manager's capabilities
+ */
+static void SRXAFSCB_GetCapabilities(struct work_struct *work)
+{
+ struct afs_interface *ifs;
+ struct afs_call *call = container_of(work, struct afs_call, work);
+ int loop, nifs;
+
+ struct {
+ struct /* InterfaceAddr */ {
+ __be32 nifs;
+ __be32 uuid[11];
+ __be32 ifaddr[32];
+ __be32 netmask[32];
+ __be32 mtu[32];
+ } ia;
+ struct /* Capabilities */ {
+ __be32 capcount;
+ __be32 caps[1];
+ } cap;
+ } reply;
+
+ _enter("");
+
+ nifs = 0;
+ ifs = kcalloc(32, sizeof(*ifs), GFP_KERNEL);
+ if (ifs) {
+ nifs = afs_get_ipv4_interfaces(ifs, 32, false);
+ if (nifs < 0) {
+ kfree(ifs);
+ ifs = NULL;
+ nifs = 0;
}
- spin_unlock(&afscm_calls_lock);
+ }
- if (removed)
- rxrpc_put_call(call);
- break;
+ memset(&reply, 0, sizeof(reply));
+ reply.ia.nifs = htonl(nifs);
+
+ reply.ia.uuid[0] = htonl(afs_uuid.time_low);
+ reply.ia.uuid[1] = htonl(afs_uuid.time_mid);
+ reply.ia.uuid[2] = htonl(afs_uuid.time_hi_and_version);
+ reply.ia.uuid[3] = htonl((s8) afs_uuid.clock_seq_hi_and_reserved);
+ reply.ia.uuid[4] = htonl((s8) afs_uuid.clock_seq_low);
+ for (loop = 0; loop < 6; loop++)
+ reply.ia.uuid[loop + 5] = htonl((s8) afs_uuid.node[loop]);
+
+ if (ifs) {
+ for (loop = 0; loop < nifs; loop++) {
+ reply.ia.ifaddr[loop] = ifs[loop].address.s_addr;
+ reply.ia.netmask[loop] = ifs[loop].netmask.s_addr;
+ reply.ia.mtu[loop] = htonl(ifs[loop].mtu);
+ }
+ kfree(ifs);
+ }
- /* operation terminated on error */
- case RXRPC_CSTATE_ERROR:
- call->app_user = NULL;
- break;
+ reply.cap.capcount = htonl(1);
+ reply.cap.caps[0] = htonl(AFS_CAP_ERROR_TRANSLATION);
+ afs_send_simple_reply(call, &reply, sizeof(reply));
- default:
- break;
- }
+ _leave("");
+}
- if (ret < 0)
- rxrpc_call_abort(call, ret);
+/*
+ * deliver request data to a CB.GetCapabilities call
+ */
+static int afs_deliver_cb_get_capabilities(struct afs_call *call,
+ struct sk_buff *skb, bool last)
+{
+ _enter(",{%u},%d", skb->len, last);
- afs_put_server(server);
+ if (skb->len > 0)
+ return -EBADMSG;
+ if (!last)
+ return 0;
- _leave(" = %d", ret);
+ /* no unmarshalling required */
+ call->state = AFS_CALL_REPLYING;
-} /* end _SRXAFSCM_Probe() */
+ INIT_WORK(&call->work, SRXAFSCB_GetCapabilities);
+ schedule_work(&call->work);
+ return 0;
+}
diff --git a/fs/afs/cmservice.h b/fs/afs/cmservice.h
deleted file mode 100644
index af8d4d689cb..00000000000
--- a/fs/afs/cmservice.h
+++ /dev/null
@@ -1,29 +0,0 @@
-/* cmservice.h: AFS Cache Manager Service declarations
- *
- * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#ifndef _LINUX_AFS_CMSERVICE_H
-#define _LINUX_AFS_CMSERVICE_H
-
-#include <rxrpc/transport.h>
-#include "types.h"
-
-/* cache manager start/stop */
-extern int afscm_start(void);
-extern void afscm_stop(void);
-
-/* cache manager server functions */
-extern int SRXAFSCM_InitCallBackState(struct afs_server *server);
-extern int SRXAFSCM_CallBack(struct afs_server *server,
- size_t count,
- struct afs_callback callbacks[]);
-extern int SRXAFSCM_Probe(struct afs_server *server);
-
-#endif /* _LINUX_AFS_CMSERVICE_H */
diff --git a/fs/afs/dir.c b/fs/afs/dir.c
index b6dc2ebe47a..dac5b990c0c 100644
--- a/fs/afs/dir.c
+++ b/fs/afs/dir.c
@@ -15,45 +15,53 @@
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/pagemap.h>
-#include <linux/smp_lock.h>
-#include "vnode.h"
-#include "volume.h"
-#include <rxrpc/call.h>
-#include "super.h"
+#include <linux/ctype.h>
#include "internal.h"
-static struct dentry *afs_dir_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd);
+static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry,
+ struct nameidata *nd);
static int afs_dir_open(struct inode *inode, struct file *file);
-static int afs_dir_readdir(struct file *file, void *dirent, filldir_t filldir);
+static int afs_readdir(struct file *file, void *dirent, filldir_t filldir);
static int afs_d_revalidate(struct dentry *dentry, struct nameidata *nd);
static int afs_d_delete(struct dentry *dentry);
-static int afs_dir_lookup_filldir(void *_cookie, const char *name, int nlen,
+static void afs_d_release(struct dentry *dentry);
+static int afs_lookup_filldir(void *_cookie, const char *name, int nlen,
loff_t fpos, u64 ino, unsigned dtype);
+static int afs_create(struct inode *dir, struct dentry *dentry, int mode,
+ struct nameidata *nd);
+static int afs_mkdir(struct inode *dir, struct dentry *dentry, int mode);
+static int afs_rmdir(struct inode *dir, struct dentry *dentry);
+static int afs_unlink(struct inode *dir, struct dentry *dentry);
+static int afs_link(struct dentry *from, struct inode *dir,
+ struct dentry *dentry);
+static int afs_symlink(struct inode *dir, struct dentry *dentry,
+ const char *content);
+static int afs_rename(struct inode *old_dir, struct dentry *old_dentry,
+ struct inode *new_dir, struct dentry *new_dentry);
const struct file_operations afs_dir_file_operations = {
.open = afs_dir_open,
- .readdir = afs_dir_readdir,
+ .release = afs_release,
+ .readdir = afs_readdir,
};
const struct inode_operations afs_dir_inode_operations = {
- .lookup = afs_dir_lookup,
+ .create = afs_create,
+ .lookup = afs_lookup,
+ .link = afs_link,
+ .unlink = afs_unlink,
+ .symlink = afs_symlink,
+ .mkdir = afs_mkdir,
+ .rmdir = afs_rmdir,
+ .rename = afs_rename,
+ .permission = afs_permission,
.getattr = afs_inode_getattr,
-#if 0 /* TODO */
- .create = afs_dir_create,
- .link = afs_dir_link,
- .unlink = afs_dir_unlink,
- .symlink = afs_dir_symlink,
- .mkdir = afs_dir_mkdir,
- .rmdir = afs_dir_rmdir,
- .mknod = afs_dir_mknod,
- .rename = afs_dir_rename,
-#endif
};
static struct dentry_operations afs_fs_dentry_operations = {
.d_revalidate = afs_d_revalidate,
.d_delete = afs_d_delete,
+ .d_release = afs_d_release,
};
#define AFS_DIR_HASHTBL_SIZE 128
@@ -105,14 +113,13 @@ struct afs_dir_page {
union afs_dir_block blocks[PAGE_SIZE / sizeof(union afs_dir_block)];
};
-struct afs_dir_lookup_cookie {
+struct afs_lookup_cookie {
struct afs_fid fid;
const char *name;
size_t nlen;
int found;
};
-/*****************************************************************************/
/*
* check that a directory page is valid
*/
@@ -128,9 +135,10 @@ static inline void afs_dir_check_page(struct inode *dir, struct page *page)
if (qty == 0)
goto error;
- if (page->index==0 && qty!=ntohs(dbuf->blocks[0].pagehdr.npages)) {
+ if (page->index == 0 && qty != ntohs(dbuf->blocks[0].pagehdr.npages)) {
printk("kAFS: %s(%lu): wrong number of dir blocks %d!=%hu\n",
- __FUNCTION__,dir->i_ino,qty,ntohs(dbuf->blocks[0].pagehdr.npages));
+ __FUNCTION__, dir->i_ino, qty,
+ ntohs(dbuf->blocks[0].pagehdr.npages));
goto error;
}
#endif
@@ -157,13 +165,11 @@ static inline void afs_dir_check_page(struct inode *dir, struct page *page)
SetPageChecked(page);
return;
- error:
+error:
SetPageChecked(page);
SetPageError(page);
+}
-} /* end afs_dir_check_page() */
-
-/*****************************************************************************/
/*
* discard a page cached in the pagecache
*/
@@ -171,20 +177,22 @@ static inline void afs_dir_put_page(struct page *page)
{
kunmap(page);
page_cache_release(page);
+}
-} /* end afs_dir_put_page() */
-
-/*****************************************************************************/
/*
* get a page into the pagecache
*/
-static struct page *afs_dir_get_page(struct inode *dir, unsigned long index)
+static struct page *afs_dir_get_page(struct inode *dir, unsigned long index,
+ struct key *key)
{
struct page *page;
+ struct file file = {
+ .private_data = key,
+ };
_enter("{%lu},%lu", dir->i_ino, index);
- page = read_mapping_page(dir->i_mapping, index, NULL);
+ page = read_mapping_page(dir->i_mapping, index, &file);
if (!IS_ERR(page)) {
wait_on_page_locked(page);
kmap(page);
@@ -197,12 +205,12 @@ static struct page *afs_dir_get_page(struct inode *dir, unsigned long index)
}
return page;
- fail:
+fail:
afs_dir_put_page(page);
+ _leave(" = -EIO");
return ERR_PTR(-EIO);
-} /* end afs_dir_get_page() */
+}
-/*****************************************************************************/
/*
* open an AFS directory file
*/
@@ -213,15 +221,12 @@ static int afs_dir_open(struct inode *inode, struct file *file)
BUILD_BUG_ON(sizeof(union afs_dir_block) != 2048);
BUILD_BUG_ON(sizeof(union afs_dirent) != 32);
- if (AFS_FS_I(inode)->flags & AFS_VNODE_DELETED)
+ if (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(inode)->flags))
return -ENOENT;
- _leave(" = 0");
- return 0;
-
-} /* end afs_dir_open() */
+ return afs_open(inode, file);
+}
-/*****************************************************************************/
/*
* deal with one block in an AFS directory
*/
@@ -250,7 +255,7 @@ static int afs_dir_iterate_block(unsigned *fpos,
/* skip entries marked unused in the bitmap */
if (!(block->pagehdr.bitmap[offset / 8] &
(1 << (offset % 8)))) {
- _debug("ENT[%Zu.%u]: unused\n",
+ _debug("ENT[%Zu.%u]: unused",
blkoff / sizeof(union afs_dir_block), offset);
if (offset >= curr)
*fpos = blkoff +
@@ -264,7 +269,7 @@ static int afs_dir_iterate_block(unsigned *fpos,
sizeof(*block) -
offset * sizeof(union afs_dirent));
- _debug("ENT[%Zu.%u]: %s %Zu \"%s\"\n",
+ _debug("ENT[%Zu.%u]: %s %Zu \"%s\"",
blkoff / sizeof(union afs_dir_block), offset,
(offset < curr ? "skip" : "fill"),
nlen, dire->u.name);
@@ -274,7 +279,7 @@ static int afs_dir_iterate_block(unsigned *fpos,
if (next >= AFS_DIRENT_PER_BLOCK) {
_debug("ENT[%Zu.%u]:"
" %u travelled beyond end dir block"
- " (len %u/%Zu)\n",
+ " (len %u/%Zu)",
blkoff / sizeof(union afs_dir_block),
offset, next, tmp, nlen);
return -EIO;
@@ -282,13 +287,13 @@ static int afs_dir_iterate_block(unsigned *fpos,
if (!(block->pagehdr.bitmap[next / 8] &
(1 << (next % 8)))) {
_debug("ENT[%Zu.%u]:"
- " %u unmarked extension (len %u/%Zu)\n",
+ " %u unmarked extension (len %u/%Zu)",
blkoff / sizeof(union afs_dir_block),
offset, next, tmp, nlen);
return -EIO;
}
- _debug("ENT[%Zu.%u]: ext %u/%Zu\n",
+ _debug("ENT[%Zu.%u]: ext %u/%Zu",
blkoff / sizeof(union afs_dir_block),
next, tmp, nlen);
next++;
@@ -304,7 +309,7 @@ static int afs_dir_iterate_block(unsigned *fpos,
nlen,
blkoff + offset * sizeof(union afs_dirent),
ntohl(dire->u.vnode),
- filldir == afs_dir_lookup_filldir ?
+ filldir == afs_lookup_filldir ?
ntohl(dire->u.unique) : DT_UNKNOWN);
if (ret < 0) {
_leave(" = 0 [full]");
@@ -316,16 +321,15 @@ static int afs_dir_iterate_block(unsigned *fpos,
_leave(" = 1 [more]");
return 1;
-} /* end afs_dir_iterate_block() */
+}
-/*****************************************************************************/
/*
- * read an AFS directory
+ * iterate through the data blob that lists the contents of an AFS directory
*/
static int afs_dir_iterate(struct inode *dir, unsigned *fpos, void *cookie,
- filldir_t filldir)
+ filldir_t filldir, struct key *key)
{
- union afs_dir_block *dblock;
+ union afs_dir_block *dblock;
struct afs_dir_page *dbuf;
struct page *page;
unsigned blkoff, limit;
@@ -333,7 +337,7 @@ static int afs_dir_iterate(struct inode *dir, unsigned *fpos, void *cookie,
_enter("{%lu},%u,,", dir->i_ino, *fpos);
- if (AFS_FS_I(dir)->flags & AFS_VNODE_DELETED) {
+ if (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(dir)->flags)) {
_leave(" = -ESTALE");
return -ESTALE;
}
@@ -348,7 +352,7 @@ static int afs_dir_iterate(struct inode *dir, unsigned *fpos, void *cookie,
blkoff = *fpos & ~(sizeof(union afs_dir_block) - 1);
/* fetch the appropriate page from the directory */
- page = afs_dir_get_page(dir, blkoff / PAGE_SIZE);
+ page = afs_dir_get_page(dir, blkoff / PAGE_SIZE, key);
if (IS_ERR(page)) {
ret = PTR_ERR(page);
break;
@@ -377,43 +381,50 @@ static int afs_dir_iterate(struct inode *dir, unsigned *fpos, void *cookie,
ret = 0;
}
- out:
+out:
_leave(" = %d", ret);
return ret;
-} /* end afs_dir_iterate() */
+}
-/*****************************************************************************/
/*
* read an AFS directory
*/
-static int afs_dir_readdir(struct file *file, void *cookie, filldir_t filldir)
+static int afs_readdir(struct file *file, void *cookie, filldir_t filldir)
{
unsigned fpos;
int ret;
- _enter("{%Ld,{%lu}}", file->f_pos, file->f_path.dentry->d_inode->i_ino);
+ _enter("{%Ld,{%lu}}",
+ file->f_pos, file->f_path.dentry->d_inode->i_ino);
+
+ ASSERT(file->private_data != NULL);
fpos = file->f_pos;
- ret = afs_dir_iterate(file->f_path.dentry->d_inode, &fpos, cookie, filldir);
+ ret = afs_dir_iterate(file->f_path.dentry->d_inode, &fpos,
+ cookie, filldir, file->private_data);
file->f_pos = fpos;
_leave(" = %d", ret);
return ret;
-} /* end afs_dir_readdir() */
+}
-/*****************************************************************************/
/*
* search the directory for a name
* - if afs_dir_iterate_block() spots this function, it'll pass the FID
* uniquifier through dtype
*/
-static int afs_dir_lookup_filldir(void *_cookie, const char *name, int nlen,
- loff_t fpos, u64 ino, unsigned dtype)
+static int afs_lookup_filldir(void *_cookie, const char *name, int nlen,
+ loff_t fpos, u64 ino, unsigned dtype)
{
- struct afs_dir_lookup_cookie *cookie = _cookie;
+ struct afs_lookup_cookie *cookie = _cookie;
- _enter("{%s,%Zu},%s,%u,,%lu,%u",
- cookie->name, cookie->nlen, name, nlen, ino, dtype);
+ _enter("{%s,%Zu},%s,%u,,%llu,%u",
+ cookie->name, cookie->nlen, name, nlen,
+ (unsigned long long) ino, dtype);
+
+ /* insanity checks first */
+ BUILD_BUG_ON(sizeof(union afs_dir_block) != 2048);
+ BUILD_BUG_ON(sizeof(union afs_dirent) != 32);
if (cookie->nlen != nlen || memcmp(cookie->name, name, nlen) != 0) {
_leave(" = 0 [no]");
@@ -426,216 +437,254 @@ static int afs_dir_lookup_filldir(void *_cookie, const char *name, int nlen,
_leave(" = -1 [found]");
return -1;
-} /* end afs_dir_lookup_filldir() */
+}
-/*****************************************************************************/
/*
- * look up an entry in a directory
+ * do a lookup in a directory
+ * - just returns the FID the dentry name maps to if found
*/
-static struct dentry *afs_dir_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
+static int afs_do_lookup(struct inode *dir, struct dentry *dentry,
+ struct afs_fid *fid, struct key *key)
{
- struct afs_dir_lookup_cookie cookie;
+ struct afs_lookup_cookie cookie;
struct afs_super_info *as;
+ unsigned fpos;
+ int ret;
+
+ _enter("{%lu},%p{%s},", dir->i_ino, dentry, dentry->d_name.name);
+
+ as = dir->i_sb->s_fs_info;
+
+ /* search the directory */
+ cookie.name = dentry->d_name.name;
+ cookie.nlen = dentry->d_name.len;
+ cookie.fid.vid = as->volume->vid;
+ cookie.found = 0;
+
+ fpos = 0;
+ ret = afs_dir_iterate(dir, &fpos, &cookie, afs_lookup_filldir,
+ key);
+ if (ret < 0) {
+ _leave(" = %d [iter]", ret);
+ return ret;
+ }
+
+ ret = -ENOENT;
+ if (!cookie.found) {
+ _leave(" = -ENOENT [not found]");
+ return -ENOENT;
+ }
+
+ *fid = cookie.fid;
+ _leave(" = 0 { vn=%u u=%u }", fid->vnode, fid->unique);
+ return 0;
+}
+
+/*
+ * look up an entry in a directory
+ */
+static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry,
+ struct nameidata *nd)
+{
struct afs_vnode *vnode;
+ struct afs_fid fid;
struct inode *inode;
- unsigned fpos;
+ struct key *key;
int ret;
- _enter("{%lu},%p{%s}", dir->i_ino, dentry, dentry->d_name.name);
+ vnode = AFS_FS_I(dir);
- /* insanity checks first */
- BUILD_BUG_ON(sizeof(union afs_dir_block) != 2048);
- BUILD_BUG_ON(sizeof(union afs_dirent) != 32);
+ _enter("{%x:%d},%p{%s},",
+ vnode->fid.vid, vnode->fid.vnode, dentry, dentry->d_name.name);
+
+ ASSERTCMP(dentry->d_inode, ==, NULL);
if (dentry->d_name.len > 255) {
_leave(" = -ENAMETOOLONG");
return ERR_PTR(-ENAMETOOLONG);
}
- vnode = AFS_FS_I(dir);
- if (vnode->flags & AFS_VNODE_DELETED) {
+ if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) {
_leave(" = -ESTALE");
return ERR_PTR(-ESTALE);
}
- as = dir->i_sb->s_fs_info;
-
- /* search the directory */
- cookie.name = dentry->d_name.name;
- cookie.nlen = dentry->d_name.len;
- cookie.fid.vid = as->volume->vid;
- cookie.found = 0;
+ key = afs_request_key(vnode->volume->cell);
+ if (IS_ERR(key)) {
+ _leave(" = %ld [key]", PTR_ERR(key));
+ return ERR_PTR(PTR_ERR(key));
+ }
- fpos = 0;
- ret = afs_dir_iterate(dir, &fpos, &cookie, afs_dir_lookup_filldir);
+ ret = afs_validate(vnode, key);
if (ret < 0) {
- _leave(" = %d", ret);
+ key_put(key);
+ _leave(" = %d [val]", ret);
return ERR_PTR(ret);
}
- ret = -ENOENT;
- if (!cookie.found) {
- _leave(" = %d", ret);
+ ret = afs_do_lookup(dir, dentry, &fid, key);
+ if (ret < 0) {
+ key_put(key);
+ if (ret == -ENOENT) {
+ d_add(dentry, NULL);
+ _leave(" = NULL [negative]");
+ return NULL;
+ }
+ _leave(" = %d [do]", ret);
return ERR_PTR(ret);
}
+ dentry->d_fsdata = (void *)(unsigned long) vnode->status.data_version;
/* instantiate the dentry */
- ret = afs_iget(dir->i_sb, &cookie.fid, &inode);
- if (ret < 0) {
- _leave(" = %d", ret);
- return ERR_PTR(ret);
+ inode = afs_iget(dir->i_sb, key, &fid, NULL, NULL);
+ key_put(key);
+ if (IS_ERR(inode)) {
+ _leave(" = %ld", PTR_ERR(inode));
+ return ERR_PTR(PTR_ERR(inode));
}
dentry->d_op = &afs_fs_dentry_operations;
- dentry->d_fsdata = (void *) (unsigned long) vnode->status.version;
d_add(dentry, inode);
_leave(" = 0 { vn=%u u=%u } -> { ino=%lu v=%lu }",
- cookie.fid.vnode,
- cookie.fid.unique,
+ fid.vnode,
+ fid.unique,
dentry->d_inode->i_ino,
dentry->d_inode->i_version);
return NULL;
-} /* end afs_dir_lookup() */
+}
-/*****************************************************************************/
/*
* check that a dentry lookup hit has found a valid entry
* - NOTE! the hit can be a negative hit too, so we can't assume we have an
* inode
- * (derived from nfs_lookup_revalidate)
*/
static int afs_d_revalidate(struct dentry *dentry, struct nameidata *nd)
{
- struct afs_dir_lookup_cookie cookie;
+ struct afs_vnode *vnode, *dir;
+ struct afs_fid fid;
struct dentry *parent;
- struct inode *inode, *dir;
- unsigned fpos;
+ struct key *key;
+ void *dir_version;
int ret;
- _enter("{sb=%p n=%s},", dentry->d_sb, dentry->d_name.name);
+ vnode = AFS_FS_I(dentry->d_inode);
- /* lock down the parent dentry so we can peer at it */
- parent = dget_parent(dentry->d_parent);
+ if (dentry->d_inode)
+ _enter("{v={%x:%u} n=%s fl=%lx},",
+ vnode->fid.vid, vnode->fid.vnode, dentry->d_name.name,
+ vnode->flags);
+ else
+ _enter("{neg n=%s}", dentry->d_name.name);
- dir = parent->d_inode;
- inode = dentry->d_inode;
+ key = afs_request_key(AFS_FS_S(dentry->d_sb)->volume->cell);
+ if (IS_ERR(key))
+ key = NULL;
- /* handle a negative dentry */
- if (!inode)
+ /* lock down the parent dentry so we can peer at it */
+ parent = dget_parent(dentry);
+ if (!parent->d_inode)
goto out_bad;
- /* handle a bad inode */
- if (is_bad_inode(inode)) {
- printk("kAFS: afs_d_revalidate: %s/%s has bad inode\n",
- dentry->d_parent->d_name.name, dentry->d_name.name);
- goto out_bad;
- }
+ dir = AFS_FS_I(parent->d_inode);
- /* force a full look up if the parent directory changed since last the
- * server was consulted
- * - otherwise this inode must still exist, even if the inode details
- * themselves have changed
- */
- if (AFS_FS_I(dir)->flags & AFS_VNODE_CHANGED)
- afs_vnode_fetch_status(AFS_FS_I(dir));
+ /* validate the parent directory */
+ if (test_bit(AFS_VNODE_MODIFIED, &dir->flags))
+ afs_validate(dir, key);
- if (AFS_FS_I(dir)->flags & AFS_VNODE_DELETED) {
+ if (test_bit(AFS_VNODE_DELETED, &dir->flags)) {
_debug("%s: parent dir deleted", dentry->d_name.name);
goto out_bad;
}
- if (AFS_FS_I(inode)->flags & AFS_VNODE_DELETED) {
- _debug("%s: file already deleted", dentry->d_name.name);
- goto out_bad;
- }
-
- if ((unsigned long) dentry->d_fsdata !=
- (unsigned long) AFS_FS_I(dir)->status.version) {
- _debug("%s: parent changed %lu -> %u",
- dentry->d_name.name,
- (unsigned long) dentry->d_fsdata,
- (unsigned) AFS_FS_I(dir)->status.version);
+ dir_version = (void *) (unsigned long) dir->status.data_version;
+ if (dentry->d_fsdata == dir_version)
+ goto out_valid; /* the dir contents are unchanged */
- /* search the directory for this vnode */
- cookie.name = dentry->d_name.name;
- cookie.nlen = dentry->d_name.len;
- cookie.fid.vid = AFS_FS_I(inode)->volume->vid;
- cookie.found = 0;
+ _debug("dir modified");
- fpos = 0;
- ret = afs_dir_iterate(dir, &fpos, &cookie,
- afs_dir_lookup_filldir);
- if (ret < 0) {
- _debug("failed to iterate dir %s: %d",
- parent->d_name.name, ret);
+ /* search the directory for this vnode */
+ ret = afs_do_lookup(&dir->vfs_inode, dentry, &fid, key);
+ switch (ret) {
+ case 0:
+ /* the filename maps to something */
+ if (!dentry->d_inode)
+ goto out_bad;
+ if (is_bad_inode(dentry->d_inode)) {
+ printk("kAFS: afs_d_revalidate: %s/%s has bad inode\n",
+ parent->d_name.name, dentry->d_name.name);
goto out_bad;
- }
-
- if (!cookie.found) {
- _debug("%s: dirent not found", dentry->d_name.name);
- goto not_found;
}
/* if the vnode ID has changed, then the dirent points to a
* different file */
- if (cookie.fid.vnode != AFS_FS_I(inode)->fid.vnode) {
- _debug("%s: dirent changed", dentry->d_name.name);
+ if (fid.vnode != vnode->fid.vnode) {
+ _debug("%s: dirent changed [%u != %u]",
+ dentry->d_name.name, fid.vnode,
+ vnode->fid.vnode);
goto not_found;
}
/* if the vnode ID uniqifier has changed, then the file has
- * been deleted */
- if (cookie.fid.unique != AFS_FS_I(inode)->fid.unique) {
+ * been deleted and replaced, and the original vnode ID has
+ * been reused */
+ if (fid.unique != vnode->fid.unique) {
_debug("%s: file deleted (uq %u -> %u I:%lu)",
- dentry->d_name.name,
- cookie.fid.unique,
- AFS_FS_I(inode)->fid.unique,
- inode->i_version);
- spin_lock(&AFS_FS_I(inode)->lock);
- AFS_FS_I(inode)->flags |= AFS_VNODE_DELETED;
- spin_unlock(&AFS_FS_I(inode)->lock);
- invalidate_remote_inode(inode);
- goto out_bad;
+ dentry->d_name.name, fid.unique,
+ vnode->fid.unique, dentry->d_inode->i_version);
+ spin_lock(&vnode->lock);
+ set_bit(AFS_VNODE_DELETED, &vnode->flags);
+ spin_unlock(&vnode->lock);
+ goto not_found;
}
+ goto out_valid;
+
+ case -ENOENT:
+ /* the filename is unknown */
+ _debug("%s: dirent not found", dentry->d_name.name);
+ if (dentry->d_inode)
+ goto not_found;
+ goto out_valid;
- dentry->d_fsdata =
- (void *) (unsigned long) AFS_FS_I(dir)->status.version;
+ default:
+ _debug("failed to iterate dir %s: %d",
+ parent->d_name.name, ret);
+ goto out_bad;
}
- out_valid:
+out_valid:
+ dentry->d_fsdata = dir_version;
+out_skip:
dput(parent);
+ key_put(key);
_leave(" = 1 [valid]");
return 1;
/* the dirent, if it exists, now points to a different vnode */
- not_found:
+not_found:
spin_lock(&dentry->d_lock);
dentry->d_flags |= DCACHE_NFSFS_RENAMED;
spin_unlock(&dentry->d_lock);
- out_bad:
- if (inode) {
+out_bad:
+ if (dentry->d_inode) {
/* don't unhash if we have submounts */
if (have_submounts(dentry))
- goto out_valid;
+ goto out_skip;
}
- shrink_dcache_parent(dentry);
-
_debug("dropping dentry %s/%s",
- dentry->d_parent->d_name.name, dentry->d_name.name);
+ parent->d_name.name, dentry->d_name.name);
+ shrink_dcache_parent(dentry);
d_drop(dentry);
-
dput(parent);
+ key_put(key);
_leave(" = 0 [bad]");
return 0;
-} /* end afs_d_revalidate() */
+}
-/*****************************************************************************/
/*
* allow the VFS to enquire as to whether a dentry should be unhashed (mustn't
* sleep)
@@ -649,15 +698,444 @@ static int afs_d_delete(struct dentry *dentry)
if (dentry->d_flags & DCACHE_NFSFS_RENAMED)
goto zap;
- if (dentry->d_inode) {
- if (AFS_FS_I(dentry->d_inode)->flags & AFS_VNODE_DELETED)
+ if (dentry->d_inode &&
+ test_bit(AFS_VNODE_DELETED, &AFS_FS_I(dentry->d_inode)->flags))
goto zap;
- }
_leave(" = 0 [keep]");
return 0;
- zap:
+zap:
_leave(" = 1 [zap]");
return 1;
-} /* end afs_d_delete() */
+}
+
+/*
+ * handle dentry release
+ */
+static void afs_d_release(struct dentry *dentry)
+{
+ _enter("%s", dentry->d_name.name);
+}
+
+/*
+ * create a directory on an AFS filesystem
+ */
+static int afs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
+{
+ struct afs_file_status status;
+ struct afs_callback cb;
+ struct afs_server *server;
+ struct afs_vnode *dvnode, *vnode;
+ struct afs_fid fid;
+ struct inode *inode;
+ struct key *key;
+ int ret;
+
+ dvnode = AFS_FS_I(dir);
+
+ _enter("{%x:%d},{%s},%o",
+ dvnode->fid.vid, dvnode->fid.vnode, dentry->d_name.name, mode);
+
+ ret = -ENAMETOOLONG;
+ if (dentry->d_name.len > 255)
+ goto error;
+
+ key = afs_request_key(dvnode->volume->cell);
+ if (IS_ERR(key)) {
+ ret = PTR_ERR(key);
+ goto error;
+ }
+
+ mode |= S_IFDIR;
+ ret = afs_vnode_create(dvnode, key, dentry->d_name.name,
+ mode, &fid, &status, &cb, &server);
+ if (ret < 0)
+ goto mkdir_error;
+
+ inode = afs_iget(dir->i_sb, key, &fid, &status, &cb);
+ if (IS_ERR(inode)) {
+ /* ENOMEM at a really inconvenient time - just abandon the new
+ * directory on the server */
+ ret = PTR_ERR(inode);
+ goto iget_error;
+ }
+
+ /* apply the status report we've got for the new vnode */
+ vnode = AFS_FS_I(inode);
+ spin_lock(&vnode->lock);
+ vnode->update_cnt++;
+ spin_unlock(&vnode->lock);
+ afs_vnode_finalise_status_update(vnode, server);
+ afs_put_server(server);
+
+ d_instantiate(dentry, inode);
+ if (d_unhashed(dentry)) {
+ _debug("not hashed");
+ d_rehash(dentry);
+ }
+ key_put(key);
+ _leave(" = 0");
+ return 0;
+
+iget_error:
+ afs_put_server(server);
+mkdir_error:
+ key_put(key);
+error:
+ d_drop(dentry);
+ _leave(" = %d", ret);
+ return ret;
+}
+
+/*
+ * remove a directory from an AFS filesystem
+ */
+static int afs_rmdir(struct inode *dir, struct dentry *dentry)
+{
+ struct afs_vnode *dvnode, *vnode;
+ struct key *key;
+ int ret;
+
+ dvnode = AFS_FS_I(dir);
+
+ _enter("{%x:%d},{%s}",
+ dvnode->fid.vid, dvnode->fid.vnode, dentry->d_name.name);
+
+ ret = -ENAMETOOLONG;
+ if (dentry->d_name.len > 255)
+ goto error;
+
+ key = afs_request_key(dvnode->volume->cell);
+ if (IS_ERR(key)) {
+ ret = PTR_ERR(key);
+ goto error;
+ }
+
+ ret = afs_vnode_remove(dvnode, key, dentry->d_name.name, true);
+ if (ret < 0)
+ goto rmdir_error;
+
+ if (dentry->d_inode) {
+ vnode = AFS_FS_I(dentry->d_inode);
+ clear_nlink(&vnode->vfs_inode);
+ set_bit(AFS_VNODE_DELETED, &vnode->flags);
+ afs_discard_callback_on_delete(vnode);
+ }
+
+ key_put(key);
+ _leave(" = 0");
+ return 0;
+
+rmdir_error:
+ key_put(key);
+error:
+ _leave(" = %d", ret);
+ return ret;
+}
+
+/*
+ * remove a file from an AFS filesystem
+ */
+static int afs_unlink(struct inode *dir, struct dentry *dentry)
+{
+ struct afs_vnode *dvnode, *vnode;
+ struct key *key;
+ int ret;
+
+ dvnode = AFS_FS_I(dir);
+
+ _enter("{%x:%d},{%s}",
+ dvnode->fid.vid, dvnode->fid.vnode, dentry->d_name.name);
+
+ ret = -ENAMETOOLONG;
+ if (dentry->d_name.len > 255)
+ goto error;
+
+ key = afs_request_key(dvnode->volume->cell);
+ if (IS_ERR(key)) {
+ ret = PTR_ERR(key);
+ goto error;
+ }
+
+ if (dentry->d_inode) {
+ vnode = AFS_FS_I(dentry->d_inode);
+
+ /* make sure we have a callback promise on the victim */
+ ret = afs_validate(vnode, key);
+ if (ret < 0)
+ goto error;
+ }
+
+ ret = afs_vnode_remove(dvnode, key, dentry->d_name.name, false);
+ if (ret < 0)
+ goto remove_error;
+
+ if (dentry->d_inode) {
+ /* if the file wasn't deleted due to excess hard links, the
+ * fileserver will break the callback promise on the file - if
+ * it had one - before it returns to us, and if it was deleted,
+ * it won't
+ *
+ * however, if we didn't have a callback promise outstanding,
+ * or it was outstanding on a different server, then it won't
+ * break it either...
+ */
+ vnode = AFS_FS_I(dentry->d_inode);
+ if (test_bit(AFS_VNODE_DELETED, &vnode->flags))
+ _debug("AFS_VNODE_DELETED");
+ if (test_bit(AFS_VNODE_CB_BROKEN, &vnode->flags))
+ _debug("AFS_VNODE_CB_BROKEN");
+ set_bit(AFS_VNODE_CB_BROKEN, &vnode->flags);
+ ret = afs_validate(vnode, key);
+ _debug("nlink %d [val %d]", vnode->vfs_inode.i_nlink, ret);
+ }
+
+ key_put(key);
+ _leave(" = 0");
+ return 0;
+
+remove_error:
+ key_put(key);
+error:
+ _leave(" = %d", ret);
+ return ret;
+}
+
+/*
+ * create a regular file on an AFS filesystem
+ */
+static int afs_create(struct inode *dir, struct dentry *dentry, int mode,
+ struct nameidata *nd)
+{
+ struct afs_file_status status;
+ struct afs_callback cb;
+ struct afs_server *server;
+ struct afs_vnode *dvnode, *vnode;
+ struct afs_fid fid;
+ struct inode *inode;
+ struct key *key;
+ int ret;
+
+ dvnode = AFS_FS_I(dir);
+
+ _enter("{%x:%d},{%s},%o,",
+ dvnode->fid.vid, dvnode->fid.vnode, dentry->d_name.name, mode);
+
+ ret = -ENAMETOOLONG;
+ if (dentry->d_name.len > 255)
+ goto error;
+
+ key = afs_request_key(dvnode->volume->cell);
+ if (IS_ERR(key)) {
+ ret = PTR_ERR(key);
+ goto error;
+ }
+
+ mode |= S_IFREG;
+ ret = afs_vnode_create(dvnode, key, dentry->d_name.name,
+ mode, &fid, &status, &cb, &server);
+ if (ret < 0)
+ goto create_error;
+
+ inode = afs_iget(dir->i_sb, key, &fid, &status, &cb);
+ if (IS_ERR(inode)) {
+ /* ENOMEM at a really inconvenient time - just abandon the new
+ * directory on the server */
+ ret = PTR_ERR(inode);
+ goto iget_error;
+ }
+
+ /* apply the status report we've got for the new vnode */
+ vnode = AFS_FS_I(inode);
+ spin_lock(&vnode->lock);
+ vnode->update_cnt++;
+ spin_unlock(&vnode->lock);
+ afs_vnode_finalise_status_update(vnode, server);
+ afs_put_server(server);
+
+ d_instantiate(dentry, inode);
+ if (d_unhashed(dentry)) {
+ _debug("not hashed");
+ d_rehash(dentry);
+ }
+ key_put(key);
+ _leave(" = 0");
+ return 0;
+
+iget_error:
+ afs_put_server(server);
+create_error:
+ key_put(key);
+error:
+ d_drop(dentry);
+ _leave(" = %d", ret);
+ return ret;
+}
+
+/*
+ * create a hard link between files in an AFS filesystem
+ */
+static int afs_link(struct dentry *from, struct inode *dir,
+ struct dentry *dentry)
+{
+ struct afs_vnode *dvnode, *vnode;
+ struct key *key;
+ int ret;
+
+ vnode = AFS_FS_I(from->d_inode);
+ dvnode = AFS_FS_I(dir);
+
+ _enter("{%x:%d},{%x:%d},{%s}",
+ vnode->fid.vid, vnode->fid.vnode,
+ dvnode->fid.vid, dvnode->fid.vnode,
+ dentry->d_name.name);
+
+ ret = -ENAMETOOLONG;
+ if (dentry->d_name.len > 255)
+ goto error;
+
+ key = afs_request_key(dvnode->volume->cell);
+ if (IS_ERR(key)) {
+ ret = PTR_ERR(key);
+ goto error;
+ }
+
+ ret = afs_vnode_link(dvnode, vnode, key, dentry->d_name.name);
+ if (ret < 0)
+ goto link_error;
+
+ atomic_inc(&vnode->vfs_inode.i_count);
+ d_instantiate(dentry, &vnode->vfs_inode);
+ key_put(key);
+ _leave(" = 0");
+ return 0;
+
+link_error:
+ key_put(key);
+error:
+ d_drop(dentry);
+ _leave(" = %d", ret);
+ return ret;
+}
+
+/*
+ * create a symlink in an AFS filesystem
+ */
+static int afs_symlink(struct inode *dir, struct dentry *dentry,
+ const char *content)
+{
+ struct afs_file_status status;
+ struct afs_server *server;
+ struct afs_vnode *dvnode, *vnode;
+ struct afs_fid fid;
+ struct inode *inode;
+ struct key *key;
+ int ret;
+
+ dvnode = AFS_FS_I(dir);
+
+ _enter("{%x:%d},{%s},%s",
+ dvnode->fid.vid, dvnode->fid.vnode, dentry->d_name.name,
+ content);
+
+ ret = -ENAMETOOLONG;
+ if (dentry->d_name.len > 255)
+ goto error;
+
+ ret = -EINVAL;
+ if (strlen(content) > 1023)
+ goto error;
+
+ key = afs_request_key(dvnode->volume->cell);
+ if (IS_ERR(key)) {
+ ret = PTR_ERR(key);
+ goto error;
+ }
+
+ ret = afs_vnode_symlink(dvnode, key, dentry->d_name.name, content,
+ &fid, &status, &server);
+ if (ret < 0)
+ goto create_error;
+
+ inode = afs_iget(dir->i_sb, key, &fid, &status, NULL);
+ if (IS_ERR(inode)) {
+ /* ENOMEM at a really inconvenient time - just abandon the new
+ * directory on the server */
+ ret = PTR_ERR(inode);
+ goto iget_error;
+ }
+
+ /* apply the status report we've got for the new vnode */
+ vnode = AFS_FS_I(inode);
+ spin_lock(&vnode->lock);
+ vnode->update_cnt++;
+ spin_unlock(&vnode->lock);
+ afs_vnode_finalise_status_update(vnode, server);
+ afs_put_server(server);
+
+ d_instantiate(dentry, inode);
+ if (d_unhashed(dentry)) {
+ _debug("not hashed");
+ d_rehash(dentry);
+ }
+ key_put(key);
+ _leave(" = 0");
+ return 0;
+
+iget_error:
+ afs_put_server(server);
+create_error:
+ key_put(key);
+error:
+ d_drop(dentry);
+ _leave(" = %d", ret);
+ return ret;
+}
+
+/*
+ * rename a file in an AFS filesystem and/or move it between directories
+ */
+static int afs_rename(struct inode *old_dir, struct dentry *old_dentry,
+ struct inode *new_dir, struct dentry *new_dentry)
+{
+ struct afs_vnode *orig_dvnode, *new_dvnode, *vnode;
+ struct key *key;
+ int ret;
+
+ vnode = AFS_FS_I(old_dentry->d_inode);
+ orig_dvnode = AFS_FS_I(old_dir);
+ new_dvnode = AFS_FS_I(new_dir);
+
+ _enter("{%x:%d},{%x:%d},{%x:%d},{%s}",
+ orig_dvnode->fid.vid, orig_dvnode->fid.vnode,
+ vnode->fid.vid, vnode->fid.vnode,
+ new_dvnode->fid.vid, new_dvnode->fid.vnode,
+ new_dentry->d_name.name);
+
+ ret = -ENAMETOOLONG;
+ if (new_dentry->d_name.len > 255)
+ goto error;
+
+ key = afs_request_key(orig_dvnode->volume->cell);
+ if (IS_ERR(key)) {
+ ret = PTR_ERR(key);
+ goto error;
+ }
+
+ ret = afs_vnode_rename(orig_dvnode, new_dvnode, key,
+ old_dentry->d_name.name,
+ new_dentry->d_name.name);
+ if (ret < 0)
+ goto rename_error;
+ key_put(key);
+ _leave(" = 0");
+ return 0;
+
+rename_error:
+ key_put(key);
+error:
+ d_drop(new_dentry);
+ _leave(" = %d", ret);
+ return ret;
+}
diff --git a/fs/afs/errors.h b/fs/afs/errors.h
deleted file mode 100644
index 574d94ac8d0..00000000000
--- a/fs/afs/errors.h
+++ /dev/null
@@ -1,34 +0,0 @@
-/* errors.h: AFS abort/error codes
- *
- * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#ifndef _LINUX_AFS_ERRORS_H
-#define _LINUX_AFS_ERRORS_H
-
-#include "types.h"
-
-/* file server abort codes */
-typedef enum {
- VSALVAGE = 101, /* volume needs salvaging */
- VNOVNODE = 102, /* no such file/dir (vnode) */
- VNOVOL = 103, /* no such volume or volume unavailable */
- VVOLEXISTS = 104, /* volume name already exists */
- VNOSERVICE = 105, /* volume not currently in service */
- VOFFLINE = 106, /* volume is currently offline (more info available [VVL-spec]) */
- VONLINE = 107, /* volume is already online */
- VDISKFULL = 108, /* disk partition is full */
- VOVERQUOTA = 109, /* volume's maximum quota exceeded */
- VBUSY = 110, /* volume is temporarily unavailable */
- VMOVED = 111, /* volume moved to new server - ask this FS where */
-} afs_rxfs_abort_t;
-
-extern int afs_abort_to_error(int abortcode);
-
-#endif /* _LINUX_AFS_ERRORS_H */
diff --git a/fs/afs/file.c b/fs/afs/file.c
index b17634541f6..ae256498f4f 100644
--- a/fs/afs/file.c
+++ b/fs/afs/file.c
@@ -1,6 +1,6 @@
-/* file.c: AFS filesystem file handling
+/* AFS filesystem file handling
*
- * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
+ * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
@@ -15,22 +15,25 @@
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/pagemap.h>
-#include "volume.h"
-#include "vnode.h"
-#include <rxrpc/call.h>
#include "internal.h"
-#if 0
-static int afs_file_open(struct inode *inode, struct file *file);
-static int afs_file_release(struct inode *inode, struct file *file);
-#endif
-
static int afs_file_readpage(struct file *file, struct page *page);
static void afs_file_invalidatepage(struct page *page, unsigned long offset);
static int afs_file_releasepage(struct page *page, gfp_t gfp_flags);
+const struct file_operations afs_file_operations = {
+ .open = afs_open,
+ .release = afs_release,
+ .llseek = generic_file_llseek,
+ .read = do_sync_read,
+ .aio_read = generic_file_aio_read,
+ .mmap = generic_file_readonly_mmap,
+ .sendfile = generic_file_sendfile,
+};
+
const struct inode_operations afs_file_inode_operations = {
.getattr = afs_inode_getattr,
+ .permission = afs_permission,
};
const struct address_space_operations afs_fs_aops = {
@@ -40,7 +43,48 @@ const struct address_space_operations afs_fs_aops = {
.invalidatepage = afs_file_invalidatepage,
};
-/*****************************************************************************/
+/*
+ * open an AFS file or directory and attach a key to it
+ */
+int afs_open(struct inode *inode, struct file *file)
+{
+ struct afs_vnode *vnode = AFS_FS_I(inode);
+ struct key *key;
+ int ret;
+
+ _enter("{%x:%x},", vnode->fid.vid, vnode->fid.vnode);
+
+ key = afs_request_key(vnode->volume->cell);
+ if (IS_ERR(key)) {
+ _leave(" = %ld [key]", PTR_ERR(key));
+ return PTR_ERR(key);
+ }
+
+ ret = afs_validate(vnode, key);
+ if (ret < 0) {
+ _leave(" = %d [val]", ret);
+ return ret;
+ }
+
+ file->private_data = key;
+ _leave(" = 0");
+ return 0;
+}
+
+/*
+ * release an AFS file or directory and discard its key
+ */
+int afs_release(struct inode *inode, struct file *file)
+{
+ struct afs_vnode *vnode = AFS_FS_I(inode);
+
+ _enter("{%x:%x},", vnode->fid.vid, vnode->fid.vnode);
+
+ key_put(file->private_data);
+ _leave(" = 0");
+ return 0;
+}
+
/*
* deal with notification that a page was read from the cache
*/
@@ -58,10 +102,9 @@ static void afs_file_readpage_read_complete(void *cookie_data,
SetPageUptodate(page);
unlock_page(page);
-} /* end afs_file_readpage_read_complete() */
+}
#endif
-/*****************************************************************************/
/*
* deal with notification that a page was written to the cache
*/
@@ -74,41 +117,38 @@ static void afs_file_readpage_write_complete(void *cookie_data,
_enter("%p,%p,%p,%d", cookie_data, page, data, error);
unlock_page(page);
-
-} /* end afs_file_readpage_write_complete() */
+}
#endif
-/*****************************************************************************/
/*
* AFS read page from file (or symlink)
*/
static int afs_file_readpage(struct file *file, struct page *page)
{
- struct afs_rxfs_fetch_descriptor desc;
-#ifdef AFS_CACHING_SUPPORT
- struct cachefs_page *pageio;
-#endif
struct afs_vnode *vnode;
struct inode *inode;
+ struct key *key;
+ size_t len;
+ off_t offset;
int ret;
inode = page->mapping->host;
- _enter("{%lu},{%lu}", inode->i_ino, page->index);
+ ASSERT(file != NULL);
+ key = file->private_data;
+ ASSERT(key != NULL);
+
+ _enter("{%x},{%lu},{%lu}", key_serial(key), inode->i_ino, page->index);
vnode = AFS_FS_I(inode);
BUG_ON(!PageLocked(page));
ret = -ESTALE;
- if (vnode->flags & AFS_VNODE_DELETED)
+ if (test_bit(AFS_VNODE_DELETED, &vnode->flags))
goto error;
#ifdef AFS_CACHING_SUPPORT
- ret = cachefs_page_get_private(page, &pageio, GFP_NOIO);
- if (ret < 0)
- goto error;
-
/* is it cached? */
ret = cachefs_read_or_alloc_page(vnode->cache,
page,
@@ -132,26 +172,19 @@ static int afs_file_readpage(struct file *file, struct page *page)
case -ENOBUFS:
case -ENODATA:
default:
- desc.fid = vnode->fid;
- desc.offset = page->index << PAGE_CACHE_SHIFT;
- desc.size = min((size_t) (inode->i_size - desc.offset),
- (size_t) PAGE_SIZE);
- desc.buffer = kmap(page);
-
- clear_page(desc.buffer);
+ offset = page->index << PAGE_CACHE_SHIFT;
+ len = min_t(size_t, i_size_read(inode) - offset, PAGE_SIZE);
/* read the contents of the file from the server into the
* page */
- ret = afs_vnode_fetch_data(vnode, &desc);
- kunmap(page);
+ ret = afs_vnode_fetch_data(vnode, key, offset, len, page);
if (ret < 0) {
- if (ret==-ENOENT) {
+ if (ret == -ENOENT) {
_debug("got NOENT from server"
" - marking file deleted and stale");
- vnode->flags |= AFS_VNODE_DELETED;
+ set_bit(AFS_VNODE_DELETED, &vnode->flags);
ret = -ESTALE;
}
-
#ifdef AFS_CACHING_SUPPORT
cachefs_uncache_page(vnode->cache, page);
#endif
@@ -178,16 +211,13 @@ static int afs_file_readpage(struct file *file, struct page *page)
_leave(" = 0");
return 0;
- error:
+error:
SetPageError(page);
unlock_page(page);
-
_leave(" = %d", ret);
return ret;
+}
-} /* end afs_file_readpage() */
-
-/*****************************************************************************/
/*
* get a page cookie for the specified page
*/
@@ -202,10 +232,9 @@ int afs_cache_get_page_cookie(struct page *page,
_leave(" = %d", ret);
return ret;
-} /* end afs_cache_get_page_cookie() */
+}
#endif
-/*****************************************************************************/
/*
* invalidate part or all of a page
*/
@@ -240,9 +269,8 @@ static void afs_file_invalidatepage(struct page *page, unsigned long offset)
}
_leave(" = %d", ret);
-} /* end afs_file_invalidatepage() */
+}
-/*****************************************************************************/
/*
* release a page and cleanup its private data
*/
@@ -267,4 +295,4 @@ static int afs_file_releasepage(struct page *page, gfp_t gfp_flags)
_leave(" = 0");
return 0;
-} /* end afs_file_releasepage() */
+}
diff --git a/fs/afs/fsclient.c b/fs/afs/fsclient.c
index 61bc371532a..e54e6c2ad34 100644
--- a/fs/afs/fsclient.c
+++ b/fs/afs/fsclient.c
@@ -1,6 +1,6 @@
-/* fsclient.c: AFS File Server client stubs
+/* AFS File Server client stubs
*
- * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
+ * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
@@ -11,827 +11,928 @@
#include <linux/init.h>
#include <linux/sched.h>
-#include <rxrpc/rxrpc.h>
-#include <rxrpc/transport.h>
-#include <rxrpc/connection.h>
-#include <rxrpc/call.h>
-#include "fsclient.h"
-#include "cmservice.h"
-#include "vnode.h"
-#include "server.h"
-#include "errors.h"
+#include <linux/circ_buf.h>
#include "internal.h"
+#include "afs_fs.h"
-#define FSFETCHSTATUS 132 /* AFS Fetch file status */
-#define FSFETCHDATA 130 /* AFS Fetch file data */
-#define FSGIVEUPCALLBACKS 147 /* AFS Discard callback promises */
-#define FSGETVOLUMEINFO 148 /* AFS Get root volume information */
-#define FSGETROOTVOLUME 151 /* AFS Get root volume name */
-#define FSLOOKUP 161 /* AFS lookup file in directory */
-
-/*****************************************************************************/
/*
- * map afs abort codes to/from Linux error codes
- * - called with call->lock held
+ * decode an AFSFid block
*/
-static void afs_rxfs_aemap(struct rxrpc_call *call)
+static void xdr_decode_AFSFid(const __be32 **_bp, struct afs_fid *fid)
{
- switch (call->app_err_state) {
- case RXRPC_ESTATE_LOCAL_ABORT:
- call->app_abort_code = -call->app_errno;
- break;
- case RXRPC_ESTATE_PEER_ABORT:
- call->app_errno = afs_abort_to_error(call->app_abort_code);
- break;
- default:
- break;
- }
-} /* end afs_rxfs_aemap() */
+ const __be32 *bp = *_bp;
+
+ fid->vid = ntohl(*bp++);
+ fid->vnode = ntohl(*bp++);
+ fid->unique = ntohl(*bp++);
+ *_bp = bp;
+}
-/*****************************************************************************/
/*
- * get the root volume name from a fileserver
- * - this operation doesn't seem to work correctly in OpenAFS server 1.2.2
+ * decode an AFSFetchStatus block
*/
-#if 0
-int afs_rxfs_get_root_volume(struct afs_server *server,
- char *buf, size_t *buflen)
+static void xdr_decode_AFSFetchStatus(const __be32 **_bp,
+ struct afs_file_status *status,
+ struct afs_vnode *vnode)
{
- struct rxrpc_connection *conn;
- struct rxrpc_call *call;
- struct kvec piov[2];
- size_t sent;
- int ret;
- u32 param[1];
+ const __be32 *bp = *_bp;
+ umode_t mode;
+ u64 data_version, size;
+ u32 changed = 0; /* becomes non-zero if ctime-type changes seen */
+
+#define EXTRACT(DST) \
+ do { \
+ u32 x = ntohl(*bp++); \
+ changed |= DST - x; \
+ DST = x; \
+ } while (0)
+
+ status->if_version = ntohl(*bp++);
+ EXTRACT(status->type);
+ EXTRACT(status->nlink);
+ size = ntohl(*bp++);
+ data_version = ntohl(*bp++);
+ EXTRACT(status->author);
+ EXTRACT(status->owner);
+ EXTRACT(status->caller_access); /* call ticket dependent */
+ EXTRACT(status->anon_access);
+ EXTRACT(status->mode);
+ EXTRACT(status->parent.vnode);
+ EXTRACT(status->parent.unique);
+ bp++; /* seg size */
+ status->mtime_client = ntohl(*bp++);
+ status->mtime_server = ntohl(*bp++);
+ EXTRACT(status->group);
+ bp++; /* sync counter */
+ data_version |= (u64) ntohl(*bp++) << 32;
+ bp++; /* lock count */
+ size |= (u64) ntohl(*bp++) << 32;
+ bp++; /* spare 4 */
+ *_bp = bp;
+
+ if (size != status->size) {
+ status->size = size;
+ changed |= true;
+ }
+ status->mode &= S_IALLUGO;
+
+ _debug("vnode time %lx, %lx",
+ status->mtime_client, status->mtime_server);
+
+ if (vnode) {
+ status->parent.vid = vnode->fid.vid;
+ if (changed && !test_bit(AFS_VNODE_UNSET, &vnode->flags)) {
+ _debug("vnode changed");
+ i_size_write(&vnode->vfs_inode, size);
+ vnode->vfs_inode.i_uid = status->owner;
+ vnode->vfs_inode.i_gid = status->group;
+ vnode->vfs_inode.i_version = vnode->fid.unique;
+ vnode->vfs_inode.i_nlink = status->nlink;
+
+ mode = vnode->vfs_inode.i_mode;
+ mode &= ~S_IALLUGO;
+ mode |= status->mode;
+ barrier();
+ vnode->vfs_inode.i_mode = mode;
+ }
- DECLARE_WAITQUEUE(myself, current);
+ vnode->vfs_inode.i_ctime.tv_sec = status->mtime_server;
+ vnode->vfs_inode.i_mtime = vnode->vfs_inode.i_ctime;
+ vnode->vfs_inode.i_atime = vnode->vfs_inode.i_ctime;
+ }
- kenter("%p,%p,%u",server, buf, *buflen);
+ if (status->data_version != data_version) {
+ status->data_version = data_version;
+ if (vnode && !test_bit(AFS_VNODE_UNSET, &vnode->flags)) {
+ _debug("vnode modified %llx on {%x:%u}",
+ (unsigned long long) data_version,
+ vnode->fid.vid, vnode->fid.vnode);
+ set_bit(AFS_VNODE_MODIFIED, &vnode->flags);
+ set_bit(AFS_VNODE_ZAP_DATA, &vnode->flags);
+ }
+ }
+}
- /* get hold of the fileserver connection */
- ret = afs_server_get_fsconn(server, &conn);
- if (ret < 0)
- goto out;
+/*
+ * decode an AFSCallBack block
+ */
+static void xdr_decode_AFSCallBack(const __be32 **_bp, struct afs_vnode *vnode)
+{
+ const __be32 *bp = *_bp;
- /* create a call through that connection */
- ret = rxrpc_create_call(conn, NULL, NULL, afs_rxfs_aemap, &call);
- if (ret < 0) {
- printk("kAFS: Unable to create call: %d\n", ret);
- goto out_put_conn;
- }
- call->app_opcode = FSGETROOTVOLUME;
+ vnode->cb_version = ntohl(*bp++);
+ vnode->cb_expiry = ntohl(*bp++);
+ vnode->cb_type = ntohl(*bp++);
+ vnode->cb_expires = vnode->cb_expiry + get_seconds();
+ *_bp = bp;
+}
- /* we want to get event notifications from the call */
- add_wait_queue(&call->waitq, &myself);
+static void xdr_decode_AFSCallBack_raw(const __be32 **_bp,
+ struct afs_callback *cb)
+{
+ const __be32 *bp = *_bp;
- /* marshall the parameters */
- param[0] = htonl(FSGETROOTVOLUME);
-
- piov[0].iov_len = sizeof(param);
- piov[0].iov_base = param;
-
- /* send the parameters to the server */
- ret = rxrpc_call_write_data(call, 1, piov, RXRPC_LAST_PACKET, GFP_NOFS,
- 0, &sent);
- if (ret < 0)
- goto abort;
-
- /* wait for the reply to completely arrive */
- for (;;) {
- set_current_state(TASK_INTERRUPTIBLE);
- if (call->app_call_state != RXRPC_CSTATE_CLNT_RCV_REPLY ||
- signal_pending(current))
- break;
- schedule();
- }
- set_current_state(TASK_RUNNING);
+ cb->version = ntohl(*bp++);
+ cb->expiry = ntohl(*bp++);
+ cb->type = ntohl(*bp++);
+ *_bp = bp;
+}
- ret = -EINTR;
- if (signal_pending(current))
- goto abort;
+/*
+ * decode an AFSVolSync block
+ */
+static void xdr_decode_AFSVolSync(const __be32 **_bp,
+ struct afs_volsync *volsync)
+{
+ const __be32 *bp = *_bp;
- switch (call->app_call_state) {
- case RXRPC_CSTATE_ERROR:
- ret = call->app_errno;
- kdebug("Got Error: %d", ret);
- goto out_unwait;
+ volsync->creation = ntohl(*bp++);
+ bp++; /* spare2 */
+ bp++; /* spare3 */
+ bp++; /* spare4 */
+ bp++; /* spare5 */
+ bp++; /* spare6 */
+ *_bp = bp;
+}
- case RXRPC_CSTATE_CLNT_GOT_REPLY:
- /* read the reply */
- kdebug("Got Reply: qty=%d", call->app_ready_qty);
+/*
+ * deliver reply data to an FS.FetchStatus
+ */
+static int afs_deliver_fs_fetch_status(struct afs_call *call,
+ struct sk_buff *skb, bool last)
+{
+ struct afs_vnode *vnode = call->reply;
+ const __be32 *bp;
- ret = -EBADMSG;
- if (call->app_ready_qty <= 4)
- goto abort;
+ _enter(",,%u", last);
- ret = rxrpc_call_read_data(call, NULL, call->app_ready_qty, 0);
- if (ret < 0)
- goto abort;
+ afs_transfer_reply(call, skb);
+ if (!last)
+ return 0;
-#if 0
- /* unmarshall the reply */
- bp = buffer;
- for (loop = 0; loop < 65; loop++)
- entry->name[loop] = ntohl(*bp++);
- entry->name[64] = 0;
+ if (call->reply_size != call->reply_max)
+ return -EBADMSG;
- entry->type = ntohl(*bp++);
- entry->num_servers = ntohl(*bp++);
+ /* unmarshall the reply once we've received all of it */
+ bp = call->buffer;
+ xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode);
+ xdr_decode_AFSCallBack(&bp, vnode);
+ if (call->reply2)
+ xdr_decode_AFSVolSync(&bp, call->reply2);
- for (loop = 0; loop < 8; loop++)
- entry->servers[loop].addr.s_addr = *bp++;
+ _leave(" = 0 [done]");
+ return 0;
+}
- for (loop = 0; loop < 8; loop++)
- entry->servers[loop].partition = ntohl(*bp++);
+/*
+ * FS.FetchStatus operation type
+ */
+static const struct afs_call_type afs_RXFSFetchStatus = {
+ .name = "FS.FetchStatus",
+ .deliver = afs_deliver_fs_fetch_status,
+ .abort_to_error = afs_abort_to_error,
+ .destructor = afs_flat_call_destructor,
+};
- for (loop = 0; loop < 8; loop++)
- entry->servers[loop].flags = ntohl(*bp++);
+/*
+ * fetch the status information for a file
+ */
+int afs_fs_fetch_file_status(struct afs_server *server,
+ struct key *key,
+ struct afs_vnode *vnode,
+ struct afs_volsync *volsync,
+ const struct afs_wait_mode *wait_mode)
+{
+ struct afs_call *call;
+ __be32 *bp;
- for (loop = 0; loop < 3; loop++)
- entry->volume_ids[loop] = ntohl(*bp++);
+ _enter(",%x,{%x:%d},,",
+ key_serial(key), vnode->fid.vid, vnode->fid.vnode);
- entry->clone_id = ntohl(*bp++);
- entry->flags = ntohl(*bp);
-#endif
+ call = afs_alloc_flat_call(&afs_RXFSFetchStatus, 16, (21 + 3 + 6) * 4);
+ if (!call)
+ return -ENOMEM;
- /* success */
- ret = 0;
- goto out_unwait;
+ call->key = key;
+ call->reply = vnode;
+ call->reply2 = volsync;
+ call->service_id = FS_SERVICE;
+ call->port = htons(AFS_FS_PORT);
- default:
- BUG();
- }
+ /* marshall the parameters */
+ bp = call->request;
+ bp[0] = htonl(FSFETCHSTATUS);
+ bp[1] = htonl(vnode->fid.vid);
+ bp[2] = htonl(vnode->fid.vnode);
+ bp[3] = htonl(vnode->fid.unique);
+
+ return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
+}
- abort:
- set_current_state(TASK_UNINTERRUPTIBLE);
- rxrpc_call_abort(call, ret);
- schedule();
- out_unwait:
- set_current_state(TASK_RUNNING);
- remove_wait_queue(&call->waitq, &myself);
- rxrpc_put_call(call);
- out_put_conn:
- afs_server_release_fsconn(server, conn);
- out:
- kleave("");
- return ret;
-} /* end afs_rxfs_get_root_volume() */
-#endif
-
-/*****************************************************************************/
/*
- * get information about a volume
+ * deliver reply data to an FS.FetchData
*/
-#if 0
-int afs_rxfs_get_volume_info(struct afs_server *server,
- const char *name,
- struct afs_volume_info *vinfo)
+static int afs_deliver_fs_fetch_data(struct afs_call *call,
+ struct sk_buff *skb, bool last)
{
- struct rxrpc_connection *conn;
- struct rxrpc_call *call;
- struct kvec piov[3];
- size_t sent;
+ struct afs_vnode *vnode = call->reply;
+ const __be32 *bp;
+ struct page *page;
+ void *buffer;
int ret;
- u32 param[2], *bp, zero;
- DECLARE_WAITQUEUE(myself, current);
+ _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
+
+ switch (call->unmarshall) {
+ case 0:
+ call->offset = 0;
+ call->unmarshall++;
+
+ /* extract the returned data length */
+ case 1:
+ _debug("extract data length");
+ ret = afs_extract_data(call, skb, last, &call->tmp, 4);
+ switch (ret) {
+ case 0: break;
+ case -EAGAIN: return 0;
+ default: return ret;
+ }
- _enter("%p,%s,%p", server, name, vinfo);
+ call->count = ntohl(call->tmp);
+ _debug("DATA length: %u", call->count);
+ if (call->count > PAGE_SIZE)
+ return -EBADMSG;
+ call->offset = 0;
+ call->unmarshall++;
+
+ if (call->count < PAGE_SIZE) {
+ page = call->reply3;
+ buffer = kmap_atomic(page, KM_USER0);
+ memset(buffer + PAGE_SIZE - call->count, 0,
+ call->count);
+ kunmap_atomic(buffer, KM_USER0);
+ }
- /* get hold of the fileserver connection */
- ret = afs_server_get_fsconn(server, &conn);
- if (ret < 0)
- goto out;
+ /* extract the returned data */
+ case 2:
+ _debug("extract data");
+ page = call->reply3;
+ buffer = kmap_atomic(page, KM_USER0);
+ ret = afs_extract_data(call, skb, last, buffer, call->count);
+ kunmap_atomic(buffer, KM_USER0);
+ switch (ret) {
+ case 0: break;
+ case -EAGAIN: return 0;
+ default: return ret;
+ }
- /* create a call through that connection */
- ret = rxrpc_create_call(conn, NULL, NULL, afs_rxfs_aemap, &call);
- if (ret < 0) {
- printk("kAFS: Unable to create call: %d\n", ret);
- goto out_put_conn;
- }
- call->app_opcode = FSGETVOLUMEINFO;
+ call->offset = 0;
+ call->unmarshall++;
+
+ /* extract the metadata */
+ case 3:
+ ret = afs_extract_data(call, skb, last, call->buffer,
+ (21 + 3 + 6) * 4);
+ switch (ret) {
+ case 0: break;
+ case -EAGAIN: return 0;
+ default: return ret;
+ }
- /* we want to get event notifications from the call */
- add_wait_queue(&call->waitq, &myself);
+ bp = call->buffer;
+ xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode);
+ xdr_decode_AFSCallBack(&bp, vnode);
+ if (call->reply2)
+ xdr_decode_AFSVolSync(&bp, call->reply2);
- /* marshall the parameters */
- piov[1].iov_len = strlen(name);
- piov[1].iov_base = (char *) name;
-
- zero = 0;
- piov[2].iov_len = (4 - (piov[1].iov_len & 3)) & 3;
- piov[2].iov_base = &zero;
-
- param[0] = htonl(FSGETVOLUMEINFO);
- param[1] = htonl(piov[1].iov_len);
-
- piov[0].iov_len = sizeof(param);
- piov[0].iov_base = param;
-
- /* send the parameters to the server */
- ret = rxrpc_call_write_data(call, 3, piov, RXRPC_LAST_PACKET, GFP_NOFS,
- 0, &sent);
- if (ret < 0)
- goto abort;
-
- /* wait for the reply to completely arrive */
- bp = rxrpc_call_alloc_scratch(call, 64);
-
- ret = rxrpc_call_read_data(call, bp, 64,
- RXRPC_CALL_READ_BLOCK |
- RXRPC_CALL_READ_ALL);
- if (ret < 0) {
- if (ret == -ECONNABORTED) {
- ret = call->app_errno;
- goto out_unwait;
- }
- goto abort;
+ call->offset = 0;
+ call->unmarshall++;
+
+ case 4:
+ _debug("trailer");
+ if (skb->len != 0)
+ return -EBADMSG;
+ break;
}
- /* unmarshall the reply */
- vinfo->vid = ntohl(*bp++);
- vinfo->type = ntohl(*bp++);
-
- vinfo->type_vids[0] = ntohl(*bp++);
- vinfo->type_vids[1] = ntohl(*bp++);
- vinfo->type_vids[2] = ntohl(*bp++);
- vinfo->type_vids[3] = ntohl(*bp++);
- vinfo->type_vids[4] = ntohl(*bp++);
-
- vinfo->nservers = ntohl(*bp++);
- vinfo->servers[0].addr.s_addr = *bp++;
- vinfo->servers[1].addr.s_addr = *bp++;
- vinfo->servers[2].addr.s_addr = *bp++;
- vinfo->servers[3].addr.s_addr = *bp++;
- vinfo->servers[4].addr.s_addr = *bp++;
- vinfo->servers[5].addr.s_addr = *bp++;
- vinfo->servers[6].addr.s_addr = *bp++;
- vinfo->servers[7].addr.s_addr = *bp++;
-
- ret = -EBADMSG;
- if (vinfo->nservers > 8)
- goto abort;
-
- /* success */
- ret = 0;
-
- out_unwait:
- set_current_state(TASK_RUNNING);
- remove_wait_queue(&call->waitq, &myself);
- rxrpc_put_call(call);
- out_put_conn:
- afs_server_release_fsconn(server, conn);
- out:
- _leave("");
- return ret;
-
- abort:
- set_current_state(TASK_UNINTERRUPTIBLE);
- rxrpc_call_abort(call, ret);
- schedule();
- goto out_unwait;
-
-} /* end afs_rxfs_get_volume_info() */
-#endif
-
-/*****************************************************************************/
+ if (!last)
+ return 0;
+
+ _leave(" = 0 [done]");
+ return 0;
+}
+
/*
- * fetch the status information for a file
+ * FS.FetchData operation type
+ */
+static const struct afs_call_type afs_RXFSFetchData = {
+ .name = "FS.FetchData",
+ .deliver = afs_deliver_fs_fetch_data,
+ .abort_to_error = afs_abort_to_error,
+ .destructor = afs_flat_call_destructor,
+};
+
+/*
+ * fetch data from a file
*/
-int afs_rxfs_fetch_file_status(struct afs_server *server,
- struct afs_vnode *vnode,
- struct afs_volsync *volsync)
+int afs_fs_fetch_data(struct afs_server *server,
+ struct key *key,
+ struct afs_vnode *vnode,
+ off_t offset, size_t length,
+ struct page *buffer,
+ const struct afs_wait_mode *wait_mode)
{
- struct afs_server_callslot callslot;
- struct rxrpc_call *call;
- struct kvec piov[1];
- size_t sent;
- int ret;
+ struct afs_call *call;
__be32 *bp;
- DECLARE_WAITQUEUE(myself, current);
+ _enter("");
- _enter("%p,{%u,%u,%u}",
- server, vnode->fid.vid, vnode->fid.vnode, vnode->fid.unique);
+ call = afs_alloc_flat_call(&afs_RXFSFetchData, 24, (21 + 3 + 6) * 4);
+ if (!call)
+ return -ENOMEM;
- /* get hold of the fileserver connection */
- ret = afs_server_request_callslot(server, &callslot);
- if (ret < 0)
- goto out;
-
- /* create a call through that connection */
- ret = rxrpc_create_call(callslot.conn, NULL, NULL, afs_rxfs_aemap,
- &call);
- if (ret < 0) {
- printk("kAFS: Unable to create call: %d\n", ret);
- goto out_put_conn;
- }
- call->app_opcode = FSFETCHSTATUS;
-
- /* we want to get event notifications from the call */
- add_wait_queue(&call->waitq, &myself);
+ call->key = key;
+ call->reply = vnode;
+ call->reply2 = NULL; /* volsync */
+ call->reply3 = buffer;
+ call->service_id = FS_SERVICE;
+ call->port = htons(AFS_FS_PORT);
/* marshall the parameters */
- bp = rxrpc_call_alloc_scratch(call, 16);
- bp[0] = htonl(FSFETCHSTATUS);
+ bp = call->request;
+ bp[0] = htonl(FSFETCHDATA);
bp[1] = htonl(vnode->fid.vid);
bp[2] = htonl(vnode->fid.vnode);
bp[3] = htonl(vnode->fid.unique);
+ bp[4] = htonl(offset);
+ bp[5] = htonl(length);
- piov[0].iov_len = 16;
- piov[0].iov_base = bp;
-
- /* send the parameters to the server */
- ret = rxrpc_call_write_data(call, 1, piov, RXRPC_LAST_PACKET, GFP_NOFS,
- 0, &sent);
- if (ret < 0)
- goto abort;
-
- /* wait for the reply to completely arrive */
- bp = rxrpc_call_alloc_scratch(call, 120);
-
- ret = rxrpc_call_read_data(call, bp, 120,
- RXRPC_CALL_READ_BLOCK |
- RXRPC_CALL_READ_ALL);
- if (ret < 0) {
- if (ret == -ECONNABORTED) {
- ret = call->app_errno;
- goto out_unwait;
- }
- goto abort;
- }
+ return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
+}
- /* unmarshall the reply */
- vnode->status.if_version = ntohl(*bp++);
- vnode->status.type = ntohl(*bp++);
- vnode->status.nlink = ntohl(*bp++);
- vnode->status.size = ntohl(*bp++);
- vnode->status.version = ntohl(*bp++);
- vnode->status.author = ntohl(*bp++);
- vnode->status.owner = ntohl(*bp++);
- vnode->status.caller_access = ntohl(*bp++);
- vnode->status.anon_access = ntohl(*bp++);
- vnode->status.mode = ntohl(*bp++);
- vnode->status.parent.vid = vnode->fid.vid;
- vnode->status.parent.vnode = ntohl(*bp++);
- vnode->status.parent.unique = ntohl(*bp++);
- bp++; /* seg size */
- vnode->status.mtime_client = ntohl(*bp++);
- vnode->status.mtime_server = ntohl(*bp++);
- bp++; /* group */
- bp++; /* sync counter */
- vnode->status.version |= ((unsigned long long) ntohl(*bp++)) << 32;
- bp++; /* spare2 */
- bp++; /* spare3 */
- bp++; /* spare4 */
+/*
+ * deliver reply data to an FS.GiveUpCallBacks
+ */
+static int afs_deliver_fs_give_up_callbacks(struct afs_call *call,
+ struct sk_buff *skb, bool last)
+{
+ _enter(",{%u},%d", skb->len, last);
- vnode->cb_version = ntohl(*bp++);
- vnode->cb_expiry = ntohl(*bp++);
- vnode->cb_type = ntohl(*bp++);
-
- if (volsync) {
- volsync->creation = ntohl(*bp++);
- bp++; /* spare2 */
- bp++; /* spare3 */
- bp++; /* spare4 */
- bp++; /* spare5 */
- bp++; /* spare6 */
- }
+ if (skb->len > 0)
+ return -EBADMSG; /* shouldn't be any reply data */
+ return 0;
+}
- /* success */
- ret = 0;
-
- out_unwait:
- set_current_state(TASK_RUNNING);
- remove_wait_queue(&call->waitq, &myself);
- rxrpc_put_call(call);
- out_put_conn:
- afs_server_release_callslot(server, &callslot);
- out:
- _leave("");
- return ret;
-
- abort:
- set_current_state(TASK_UNINTERRUPTIBLE);
- rxrpc_call_abort(call, ret);
- schedule();
- goto out_unwait;
-} /* end afs_rxfs_fetch_file_status() */
-
-/*****************************************************************************/
/*
- * fetch the contents of a file or directory
+ * FS.GiveUpCallBacks operation type
*/
-int afs_rxfs_fetch_file_data(struct afs_server *server,
- struct afs_vnode *vnode,
- struct afs_rxfs_fetch_descriptor *desc,
- struct afs_volsync *volsync)
+static const struct afs_call_type afs_RXFSGiveUpCallBacks = {
+ .name = "FS.GiveUpCallBacks",
+ .deliver = afs_deliver_fs_give_up_callbacks,
+ .abort_to_error = afs_abort_to_error,
+ .destructor = afs_flat_call_destructor,
+};
+
+/*
+ * give up a set of callbacks
+ * - the callbacks are held in the server->cb_break ring
+ */
+int afs_fs_give_up_callbacks(struct afs_server *server,
+ const struct afs_wait_mode *wait_mode)
{
- struct afs_server_callslot callslot;
- struct rxrpc_call *call;
- struct kvec piov[1];
- size_t sent;
- int ret;
- __be32 *bp;
+ struct afs_call *call;
+ size_t ncallbacks;
+ __be32 *bp, *tp;
+ int loop;
- DECLARE_WAITQUEUE(myself, current);
-
- _enter("%p,{fid={%u,%u,%u},sz=%Zu,of=%lu}",
- server,
- desc->fid.vid,
- desc->fid.vnode,
- desc->fid.unique,
- desc->size,
- desc->offset);
-
- /* get hold of the fileserver connection */
- ret = afs_server_request_callslot(server, &callslot);
- if (ret < 0)
- goto out;
-
- /* create a call through that connection */
- ret = rxrpc_create_call(callslot.conn, NULL, NULL, afs_rxfs_aemap, &call);
- if (ret < 0) {
- printk("kAFS: Unable to create call: %d\n", ret);
- goto out_put_conn;
- }
- call->app_opcode = FSFETCHDATA;
+ ncallbacks = CIRC_CNT(server->cb_break_head, server->cb_break_tail,
+ ARRAY_SIZE(server->cb_break));
+
+ _enter("{%zu},", ncallbacks);
+
+ if (ncallbacks == 0)
+ return 0;
+ if (ncallbacks > AFSCBMAX)
+ ncallbacks = AFSCBMAX;
+
+ _debug("break %zu callbacks", ncallbacks);
- /* we want to get event notifications from the call */
- add_wait_queue(&call->waitq, &myself);
+ call = afs_alloc_flat_call(&afs_RXFSGiveUpCallBacks,
+ 12 + ncallbacks * 6 * 4, 0);
+ if (!call)
+ return -ENOMEM;
+
+ call->service_id = FS_SERVICE;
+ call->port = htons(AFS_FS_PORT);
/* marshall the parameters */
- bp = rxrpc_call_alloc_scratch(call, 24);
- bp[0] = htonl(FSFETCHDATA);
- bp[1] = htonl(desc->fid.vid);
- bp[2] = htonl(desc->fid.vnode);
- bp[3] = htonl(desc->fid.unique);
- bp[4] = htonl(desc->offset);
- bp[5] = htonl(desc->size);
-
- piov[0].iov_len = 24;
- piov[0].iov_base = bp;
-
- /* send the parameters to the server */
- ret = rxrpc_call_write_data(call, 1, piov, RXRPC_LAST_PACKET, GFP_NOFS,
- 0, &sent);
- if (ret < 0)
- goto abort;
-
- /* wait for the data count to arrive */
- ret = rxrpc_call_read_data(call, bp, 4, RXRPC_CALL_READ_BLOCK);
- if (ret < 0)
- goto read_failed;
-
- desc->actual = ntohl(bp[0]);
- if (desc->actual != desc->size) {
- ret = -EBADMSG;
- goto abort;
+ bp = call->request;
+ tp = bp + 2 + ncallbacks * 3;
+ *bp++ = htonl(FSGIVEUPCALLBACKS);
+ *bp++ = htonl(ncallbacks);
+ *tp++ = htonl(ncallbacks);
+
+ atomic_sub(ncallbacks, &server->cb_break_n);
+ for (loop = ncallbacks; loop > 0; loop--) {
+ struct afs_callback *cb =
+ &server->cb_break[server->cb_break_tail];
+
+ *bp++ = htonl(cb->fid.vid);
+ *bp++ = htonl(cb->fid.vnode);
+ *bp++ = htonl(cb->fid.unique);
+ *tp++ = htonl(cb->version);
+ *tp++ = htonl(cb->expiry);
+ *tp++ = htonl(cb->type);
+ smp_mb();
+ server->cb_break_tail =
+ (server->cb_break_tail + 1) &
+ (ARRAY_SIZE(server->cb_break) - 1);
}
- /* call the app to read the actual data */
- rxrpc_call_reset_scratch(call);
-
- ret = rxrpc_call_read_data(call, desc->buffer, desc->actual,
- RXRPC_CALL_READ_BLOCK);
- if (ret < 0)
- goto read_failed;
-
- /* wait for the rest of the reply to completely arrive */
- rxrpc_call_reset_scratch(call);
- bp = rxrpc_call_alloc_scratch(call, 120);
-
- ret = rxrpc_call_read_data(call, bp, 120,
- RXRPC_CALL_READ_BLOCK |
- RXRPC_CALL_READ_ALL);
- if (ret < 0)
- goto read_failed;
-
- /* unmarshall the reply */
- vnode->status.if_version = ntohl(*bp++);
- vnode->status.type = ntohl(*bp++);
- vnode->status.nlink = ntohl(*bp++);
- vnode->status.size = ntohl(*bp++);
- vnode->status.version = ntohl(*bp++);
- vnode->status.author = ntohl(*bp++);
- vnode->status.owner = ntohl(*bp++);
- vnode->status.caller_access = ntohl(*bp++);
- vnode->status.anon_access = ntohl(*bp++);
- vnode->status.mode = ntohl(*bp++);
- vnode->status.parent.vid = desc->fid.vid;
- vnode->status.parent.vnode = ntohl(*bp++);
- vnode->status.parent.unique = ntohl(*bp++);
- bp++; /* seg size */
- vnode->status.mtime_client = ntohl(*bp++);
- vnode->status.mtime_server = ntohl(*bp++);
- bp++; /* group */
- bp++; /* sync counter */
- vnode->status.version |= ((unsigned long long) ntohl(*bp++)) << 32;
- bp++; /* spare2 */
- bp++; /* spare3 */
- bp++; /* spare4 */
+ ASSERT(ncallbacks > 0);
+ wake_up_nr(&server->cb_break_waitq, ncallbacks);
- vnode->cb_version = ntohl(*bp++);
- vnode->cb_expiry = ntohl(*bp++);
- vnode->cb_type = ntohl(*bp++);
-
- if (volsync) {
- volsync->creation = ntohl(*bp++);
- bp++; /* spare2 */
- bp++; /* spare3 */
- bp++; /* spare4 */
- bp++; /* spare5 */
- bp++; /* spare6 */
- }
+ return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
+}
- /* success */
- ret = 0;
-
- out_unwait:
- set_current_state(TASK_RUNNING);
- remove_wait_queue(&call->waitq,&myself);
- rxrpc_put_call(call);
- out_put_conn:
- afs_server_release_callslot(server, &callslot);
- out:
- _leave(" = %d", ret);
- return ret;
-
- read_failed:
- if (ret == -ECONNABORTED) {
- ret = call->app_errno;
- goto out_unwait;
- }
+/*
+ * deliver reply data to an FS.CreateFile or an FS.MakeDir
+ */
+static int afs_deliver_fs_create_vnode(struct afs_call *call,
+ struct sk_buff *skb, bool last)
+{
+ struct afs_vnode *vnode = call->reply;
+ const __be32 *bp;
+
+ _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
- abort:
- set_current_state(TASK_UNINTERRUPTIBLE);
- rxrpc_call_abort(call, ret);
- schedule();
- goto out_unwait;
+ afs_transfer_reply(call, skb);
+ if (!last)
+ return 0;
-} /* end afs_rxfs_fetch_file_data() */
+ if (call->reply_size != call->reply_max)
+ return -EBADMSG;
+
+ /* unmarshall the reply once we've received all of it */
+ bp = call->buffer;
+ xdr_decode_AFSFid(&bp, call->reply2);
+ xdr_decode_AFSFetchStatus(&bp, call->reply3, NULL);
+ xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode);
+ xdr_decode_AFSCallBack_raw(&bp, call->reply4);
+ /* xdr_decode_AFSVolSync(&bp, call->replyX); */
+
+ _leave(" = 0 [done]");
+ return 0;
+}
+
+/*
+ * FS.CreateFile and FS.MakeDir operation type
+ */
+static const struct afs_call_type afs_RXFSCreateXXXX = {
+ .name = "FS.CreateXXXX",
+ .deliver = afs_deliver_fs_create_vnode,
+ .abort_to_error = afs_abort_to_error,
+ .destructor = afs_flat_call_destructor,
+};
-/*****************************************************************************/
/*
- * ask the AFS fileserver to discard a callback request on a file
+ * create a file or make a directory
*/
-int afs_rxfs_give_up_callback(struct afs_server *server,
- struct afs_vnode *vnode)
+int afs_fs_create(struct afs_server *server,
+ struct key *key,
+ struct afs_vnode *vnode,
+ const char *name,
+ umode_t mode,
+ struct afs_fid *newfid,
+ struct afs_file_status *newstatus,
+ struct afs_callback *newcb,
+ const struct afs_wait_mode *wait_mode)
{
- struct afs_server_callslot callslot;
- struct rxrpc_call *call;
- struct kvec piov[1];
- size_t sent;
- int ret;
+ struct afs_call *call;
+ size_t namesz, reqsz, padsz;
__be32 *bp;
- DECLARE_WAITQUEUE(myself, current);
+ _enter("");
- _enter("%p,{%u,%u,%u}",
- server, vnode->fid.vid, vnode->fid.vnode, vnode->fid.unique);
+ namesz = strlen(name);
+ padsz = (4 - (namesz & 3)) & 3;
+ reqsz = (5 * 4) + namesz + padsz + (6 * 4);
- /* get hold of the fileserver connection */
- ret = afs_server_request_callslot(server, &callslot);
- if (ret < 0)
- goto out;
+ call = afs_alloc_flat_call(&afs_RXFSCreateXXXX, reqsz,
+ (3 + 21 + 21 + 3 + 6) * 4);
+ if (!call)
+ return -ENOMEM;
- /* create a call through that connection */
- ret = rxrpc_create_call(callslot.conn, NULL, NULL, afs_rxfs_aemap, &call);
- if (ret < 0) {
- printk("kAFS: Unable to create call: %d\n", ret);
- goto out_put_conn;
+ call->key = key;
+ call->reply = vnode;
+ call->reply2 = newfid;
+ call->reply3 = newstatus;
+ call->reply4 = newcb;
+ call->service_id = FS_SERVICE;
+ call->port = htons(AFS_FS_PORT);
+
+ /* marshall the parameters */
+ bp = call->request;
+ *bp++ = htonl(S_ISDIR(mode) ? FSMAKEDIR : FSCREATEFILE);
+ *bp++ = htonl(vnode->fid.vid);
+ *bp++ = htonl(vnode->fid.vnode);
+ *bp++ = htonl(vnode->fid.unique);
+ *bp++ = htonl(namesz);
+ memcpy(bp, name, namesz);
+ bp = (void *) bp + namesz;
+ if (padsz > 0) {
+ memset(bp, 0, padsz);
+ bp = (void *) bp + padsz;
}
- call->app_opcode = FSGIVEUPCALLBACKS;
+ *bp++ = htonl(AFS_SET_MODE);
+ *bp++ = 0; /* mtime */
+ *bp++ = 0; /* owner */
+ *bp++ = 0; /* group */
+ *bp++ = htonl(mode & S_IALLUGO); /* unix mode */
+ *bp++ = 0; /* segment size */
- /* we want to get event notifications from the call */
- add_wait_queue(&call->waitq, &myself);
+ return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
+}
- /* marshall the parameters */
- bp = rxrpc_call_alloc_scratch(call, (1 + 4 + 4) * 4);
+/*
+ * deliver reply data to an FS.RemoveFile or FS.RemoveDir
+ */
+static int afs_deliver_fs_remove(struct afs_call *call,
+ struct sk_buff *skb, bool last)
+{
+ struct afs_vnode *vnode = call->reply;
+ const __be32 *bp;
- piov[0].iov_len = (1 + 4 + 4) * 4;
- piov[0].iov_base = bp;
+ _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
- *bp++ = htonl(FSGIVEUPCALLBACKS);
- *bp++ = htonl(1);
+ afs_transfer_reply(call, skb);
+ if (!last)
+ return 0;
+
+ if (call->reply_size != call->reply_max)
+ return -EBADMSG;
+
+ /* unmarshall the reply once we've received all of it */
+ bp = call->buffer;
+ xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode);
+ /* xdr_decode_AFSVolSync(&bp, call->replyX); */
+
+ _leave(" = 0 [done]");
+ return 0;
+}
+
+/*
+ * FS.RemoveDir/FS.RemoveFile operation type
+ */
+static const struct afs_call_type afs_RXFSRemoveXXXX = {
+ .name = "FS.RemoveXXXX",
+ .deliver = afs_deliver_fs_remove,
+ .abort_to_error = afs_abort_to_error,
+ .destructor = afs_flat_call_destructor,
+};
+
+/*
+ * remove a file or directory
+ */
+int afs_fs_remove(struct afs_server *server,
+ struct key *key,
+ struct afs_vnode *vnode,
+ const char *name,
+ bool isdir,
+ const struct afs_wait_mode *wait_mode)
+{
+ struct afs_call *call;
+ size_t namesz, reqsz, padsz;
+ __be32 *bp;
+
+ _enter("");
+
+ namesz = strlen(name);
+ padsz = (4 - (namesz & 3)) & 3;
+ reqsz = (5 * 4) + namesz + padsz;
+
+ call = afs_alloc_flat_call(&afs_RXFSRemoveXXXX, reqsz, (21 + 6) * 4);
+ if (!call)
+ return -ENOMEM;
+
+ call->key = key;
+ call->reply = vnode;
+ call->service_id = FS_SERVICE;
+ call->port = htons(AFS_FS_PORT);
+
+ /* marshall the parameters */
+ bp = call->request;
+ *bp++ = htonl(isdir ? FSREMOVEDIR : FSREMOVEFILE);
*bp++ = htonl(vnode->fid.vid);
*bp++ = htonl(vnode->fid.vnode);
*bp++ = htonl(vnode->fid.unique);
- *bp++ = htonl(1);
- *bp++ = htonl(vnode->cb_version);
- *bp++ = htonl(vnode->cb_expiry);
- *bp++ = htonl(vnode->cb_type);
-
- /* send the parameters to the server */
- ret = rxrpc_call_write_data(call, 1, piov, RXRPC_LAST_PACKET, GFP_NOFS,
- 0, &sent);
- if (ret < 0)
- goto abort;
-
- /* wait for the reply to completely arrive */
- for (;;) {
- set_current_state(TASK_INTERRUPTIBLE);
- if (call->app_call_state != RXRPC_CSTATE_CLNT_RCV_REPLY ||
- signal_pending(current))
- break;
- schedule();
+ *bp++ = htonl(namesz);
+ memcpy(bp, name, namesz);
+ bp = (void *) bp + namesz;
+ if (padsz > 0) {
+ memset(bp, 0, padsz);
+ bp = (void *) bp + padsz;
}
- set_current_state(TASK_RUNNING);
- ret = -EINTR;
- if (signal_pending(current))
- goto abort;
+ return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
+}
- switch (call->app_call_state) {
- case RXRPC_CSTATE_ERROR:
- ret = call->app_errno;
- goto out_unwait;
+/*
+ * deliver reply data to an FS.Link
+ */
+static int afs_deliver_fs_link(struct afs_call *call,
+ struct sk_buff *skb, bool last)
+{
+ struct afs_vnode *dvnode = call->reply, *vnode = call->reply2;
+ const __be32 *bp;
- case RXRPC_CSTATE_CLNT_GOT_REPLY:
- ret = 0;
- goto out_unwait;
+ _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
- default:
- BUG();
- }
+ afs_transfer_reply(call, skb);
+ if (!last)
+ return 0;
+
+ if (call->reply_size != call->reply_max)
+ return -EBADMSG;
+
+ /* unmarshall the reply once we've received all of it */
+ bp = call->buffer;
+ xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode);
+ xdr_decode_AFSFetchStatus(&bp, &dvnode->status, dvnode);
+ /* xdr_decode_AFSVolSync(&bp, call->replyX); */
+
+ _leave(" = 0 [done]");
+ return 0;
+}
+
+/*
+ * FS.Link operation type
+ */
+static const struct afs_call_type afs_RXFSLink = {
+ .name = "FS.Link",
+ .deliver = afs_deliver_fs_link,
+ .abort_to_error = afs_abort_to_error,
+ .destructor = afs_flat_call_destructor,
+};
- out_unwait:
- set_current_state(TASK_RUNNING);
- remove_wait_queue(&call->waitq, &myself);
- rxrpc_put_call(call);
- out_put_conn:
- afs_server_release_callslot(server, &callslot);
- out:
- _leave("");
- return ret;
-
- abort:
- set_current_state(TASK_UNINTERRUPTIBLE);
- rxrpc_call_abort(call, ret);
- schedule();
- goto out_unwait;
-} /* end afs_rxfs_give_up_callback() */
-
-/*****************************************************************************/
/*
- * look a filename up in a directory
- * - this operation doesn't seem to work correctly in OpenAFS server 1.2.2
+ * make a hard link
*/
-#if 0
-int afs_rxfs_lookup(struct afs_server *server,
- struct afs_vnode *dir,
- const char *filename,
- struct afs_vnode *vnode,
- struct afs_volsync *volsync)
+int afs_fs_link(struct afs_server *server,
+ struct key *key,
+ struct afs_vnode *dvnode,
+ struct afs_vnode *vnode,
+ const char *name,
+ const struct afs_wait_mode *wait_mode)
{
- struct rxrpc_connection *conn;
- struct rxrpc_call *call;
- struct kvec piov[3];
- size_t sent;
- int ret;
- u32 *bp, zero;
+ struct afs_call *call;
+ size_t namesz, reqsz, padsz;
+ __be32 *bp;
- DECLARE_WAITQUEUE(myself, current);
+ _enter("");
- kenter("%p,{%u,%u,%u},%s",
- server, fid->vid, fid->vnode, fid->unique, filename);
+ namesz = strlen(name);
+ padsz = (4 - (namesz & 3)) & 3;
+ reqsz = (5 * 4) + namesz + padsz + (3 * 4);
- /* get hold of the fileserver connection */
- ret = afs_server_get_fsconn(server, &conn);
- if (ret < 0)
- goto out;
+ call = afs_alloc_flat_call(&afs_RXFSLink, reqsz, (21 + 21 + 6) * 4);
+ if (!call)
+ return -ENOMEM;
- /* create a call through that connection */
- ret = rxrpc_create_call(conn, NULL, NULL, afs_rxfs_aemap, &call);
- if (ret < 0) {
- printk("kAFS: Unable to create call: %d\n", ret);
- goto out_put_conn;
+ call->key = key;
+ call->reply = dvnode;
+ call->reply2 = vnode;
+ call->service_id = FS_SERVICE;
+ call->port = htons(AFS_FS_PORT);
+
+ /* marshall the parameters */
+ bp = call->request;
+ *bp++ = htonl(FSLINK);
+ *bp++ = htonl(dvnode->fid.vid);
+ *bp++ = htonl(dvnode->fid.vnode);
+ *bp++ = htonl(dvnode->fid.unique);
+ *bp++ = htonl(namesz);
+ memcpy(bp, name, namesz);
+ bp = (void *) bp + namesz;
+ if (padsz > 0) {
+ memset(bp, 0, padsz);
+ bp = (void *) bp + padsz;
}
- call->app_opcode = FSLOOKUP;
+ *bp++ = htonl(vnode->fid.vid);
+ *bp++ = htonl(vnode->fid.vnode);
+ *bp++ = htonl(vnode->fid.unique);
+
+ return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
+}
+
+/*
+ * deliver reply data to an FS.Symlink
+ */
+static int afs_deliver_fs_symlink(struct afs_call *call,
+ struct sk_buff *skb, bool last)
+{
+ struct afs_vnode *vnode = call->reply;
+ const __be32 *bp;
- /* we want to get event notifications from the call */
- add_wait_queue(&call->waitq,&myself);
+ _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
+
+ afs_transfer_reply(call, skb);
+ if (!last)
+ return 0;
+
+ if (call->reply_size != call->reply_max)
+ return -EBADMSG;
+
+ /* unmarshall the reply once we've received all of it */
+ bp = call->buffer;
+ xdr_decode_AFSFid(&bp, call->reply2);
+ xdr_decode_AFSFetchStatus(&bp, call->reply3, NULL);
+ xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode);
+ /* xdr_decode_AFSVolSync(&bp, call->replyX); */
+
+ _leave(" = 0 [done]");
+ return 0;
+}
+
+/*
+ * FS.Symlink operation type
+ */
+static const struct afs_call_type afs_RXFSSymlink = {
+ .name = "FS.Symlink",
+ .deliver = afs_deliver_fs_symlink,
+ .abort_to_error = afs_abort_to_error,
+ .destructor = afs_flat_call_destructor,
+};
+
+/*
+ * create a symbolic link
+ */
+int afs_fs_symlink(struct afs_server *server,
+ struct key *key,
+ struct afs_vnode *vnode,
+ const char *name,
+ const char *contents,
+ struct afs_fid *newfid,
+ struct afs_file_status *newstatus,
+ const struct afs_wait_mode *wait_mode)
+{
+ struct afs_call *call;
+ size_t namesz, reqsz, padsz, c_namesz, c_padsz;
+ __be32 *bp;
+
+ _enter("");
+
+ namesz = strlen(name);
+ padsz = (4 - (namesz & 3)) & 3;
+
+ c_namesz = strlen(contents);
+ c_padsz = (4 - (c_namesz & 3)) & 3;
+
+ reqsz = (6 * 4) + namesz + padsz + c_namesz + c_padsz + (6 * 4);
+
+ call = afs_alloc_flat_call(&afs_RXFSSymlink, reqsz,
+ (3 + 21 + 21 + 6) * 4);
+ if (!call)
+ return -ENOMEM;
+
+ call->key = key;
+ call->reply = vnode;
+ call->reply2 = newfid;
+ call->reply3 = newstatus;
+ call->service_id = FS_SERVICE;
+ call->port = htons(AFS_FS_PORT);
/* marshall the parameters */
- bp = rxrpc_call_alloc_scratch(call, 20);
-
- zero = 0;
-
- piov[0].iov_len = 20;
- piov[0].iov_base = bp;
- piov[1].iov_len = strlen(filename);
- piov[1].iov_base = (char *) filename;
- piov[2].iov_len = (4 - (piov[1].iov_len & 3)) & 3;
- piov[2].iov_base = &zero;
-
- *bp++ = htonl(FSLOOKUP);
- *bp++ = htonl(dirfid->vid);
- *bp++ = htonl(dirfid->vnode);
- *bp++ = htonl(dirfid->unique);
- *bp++ = htonl(piov[1].iov_len);
-
- /* send the parameters to the server */
- ret = rxrpc_call_write_data(call, 3, piov, RXRPC_LAST_PACKET, GFP_NOFS,
- 0, &sent);
- if (ret < 0)
- goto abort;
-
- /* wait for the reply to completely arrive */
- bp = rxrpc_call_alloc_scratch(call, 220);
-
- ret = rxrpc_call_read_data(call, bp, 220,
- RXRPC_CALL_READ_BLOCK |
- RXRPC_CALL_READ_ALL);
- if (ret < 0) {
- if (ret == -ECONNABORTED) {
- ret = call->app_errno;
- goto out_unwait;
- }
- goto abort;
+ bp = call->request;
+ *bp++ = htonl(FSSYMLINK);
+ *bp++ = htonl(vnode->fid.vid);
+ *bp++ = htonl(vnode->fid.vnode);
+ *bp++ = htonl(vnode->fid.unique);
+ *bp++ = htonl(namesz);
+ memcpy(bp, name, namesz);
+ bp = (void *) bp + namesz;
+ if (padsz > 0) {
+ memset(bp, 0, padsz);
+ bp = (void *) bp + padsz;
}
+ *bp++ = htonl(c_namesz);
+ memcpy(bp, contents, c_namesz);
+ bp = (void *) bp + c_namesz;
+ if (c_padsz > 0) {
+ memset(bp, 0, c_padsz);
+ bp = (void *) bp + c_padsz;
+ }
+ *bp++ = htonl(AFS_SET_MODE);
+ *bp++ = 0; /* mtime */
+ *bp++ = 0; /* owner */
+ *bp++ = 0; /* group */
+ *bp++ = htonl(S_IRWXUGO); /* unix mode */
+ *bp++ = 0; /* segment size */
- /* unmarshall the reply */
- fid->vid = ntohl(*bp++);
- fid->vnode = ntohl(*bp++);
- fid->unique = ntohl(*bp++);
+ return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
+}
- vnode->status.if_version = ntohl(*bp++);
- vnode->status.type = ntohl(*bp++);
- vnode->status.nlink = ntohl(*bp++);
- vnode->status.size = ntohl(*bp++);
- vnode->status.version = ntohl(*bp++);
- vnode->status.author = ntohl(*bp++);
- vnode->status.owner = ntohl(*bp++);
- vnode->status.caller_access = ntohl(*bp++);
- vnode->status.anon_access = ntohl(*bp++);
- vnode->status.mode = ntohl(*bp++);
- vnode->status.parent.vid = dirfid->vid;
- vnode->status.parent.vnode = ntohl(*bp++);
- vnode->status.parent.unique = ntohl(*bp++);
- bp++; /* seg size */
- vnode->status.mtime_client = ntohl(*bp++);
- vnode->status.mtime_server = ntohl(*bp++);
- bp++; /* group */
- bp++; /* sync counter */
- vnode->status.version |= ((unsigned long long) ntohl(*bp++)) << 32;
- bp++; /* spare2 */
- bp++; /* spare3 */
- bp++; /* spare4 */
+/*
+ * deliver reply data to an FS.Rename
+ */
+static int afs_deliver_fs_rename(struct afs_call *call,
+ struct sk_buff *skb, bool last)
+{
+ struct afs_vnode *orig_dvnode = call->reply, *new_dvnode = call->reply2;
+ const __be32 *bp;
- dir->status.if_version = ntohl(*bp++);
- dir->status.type = ntohl(*bp++);
- dir->status.nlink = ntohl(*bp++);
- dir->status.size = ntohl(*bp++);
- dir->status.version = ntohl(*bp++);
- dir->status.author = ntohl(*bp++);
- dir->status.owner = ntohl(*bp++);
- dir->status.caller_access = ntohl(*bp++);
- dir->status.anon_access = ntohl(*bp++);
- dir->status.mode = ntohl(*bp++);
- dir->status.parent.vid = dirfid->vid;
- dir->status.parent.vnode = ntohl(*bp++);
- dir->status.parent.unique = ntohl(*bp++);
- bp++; /* seg size */
- dir->status.mtime_client = ntohl(*bp++);
- dir->status.mtime_server = ntohl(*bp++);
- bp++; /* group */
- bp++; /* sync counter */
- dir->status.version |= ((unsigned long long) ntohl(*bp++)) << 32;
- bp++; /* spare2 */
- bp++; /* spare3 */
- bp++; /* spare4 */
+ _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
+
+ afs_transfer_reply(call, skb);
+ if (!last)
+ return 0;
+
+ if (call->reply_size != call->reply_max)
+ return -EBADMSG;
+
+ /* unmarshall the reply once we've received all of it */
+ bp = call->buffer;
+ xdr_decode_AFSFetchStatus(&bp, &orig_dvnode->status, orig_dvnode);
+ if (new_dvnode != orig_dvnode)
+ xdr_decode_AFSFetchStatus(&bp, &new_dvnode->status, new_dvnode);
+ /* xdr_decode_AFSVolSync(&bp, call->replyX); */
+
+ _leave(" = 0 [done]");
+ return 0;
+}
+
+/*
+ * FS.Rename operation type
+ */
+static const struct afs_call_type afs_RXFSRename = {
+ .name = "FS.Rename",
+ .deliver = afs_deliver_fs_rename,
+ .abort_to_error = afs_abort_to_error,
+ .destructor = afs_flat_call_destructor,
+};
+
+/*
+ * create a symbolic link
+ */
+int afs_fs_rename(struct afs_server *server,
+ struct key *key,
+ struct afs_vnode *orig_dvnode,
+ const char *orig_name,
+ struct afs_vnode *new_dvnode,
+ const char *new_name,
+ const struct afs_wait_mode *wait_mode)
+{
+ struct afs_call *call;
+ size_t reqsz, o_namesz, o_padsz, n_namesz, n_padsz;
+ __be32 *bp;
+
+ _enter("");
+
+ o_namesz = strlen(orig_name);
+ o_padsz = (4 - (o_namesz & 3)) & 3;
+
+ n_namesz = strlen(new_name);
+ n_padsz = (4 - (n_namesz & 3)) & 3;
+
+ reqsz = (4 * 4) +
+ 4 + o_namesz + o_padsz +
+ (3 * 4) +
+ 4 + n_namesz + n_padsz;
+
+ call = afs_alloc_flat_call(&afs_RXFSRename, reqsz, (21 + 21 + 6) * 4);
+ if (!call)
+ return -ENOMEM;
+
+ call->key = key;
+ call->reply = orig_dvnode;
+ call->reply2 = new_dvnode;
+ call->service_id = FS_SERVICE;
+ call->port = htons(AFS_FS_PORT);
+
+ /* marshall the parameters */
+ bp = call->request;
+ *bp++ = htonl(FSRENAME);
+ *bp++ = htonl(orig_dvnode->fid.vid);
+ *bp++ = htonl(orig_dvnode->fid.vnode);
+ *bp++ = htonl(orig_dvnode->fid.unique);
+ *bp++ = htonl(o_namesz);
+ memcpy(bp, orig_name, o_namesz);
+ bp = (void *) bp + o_namesz;
+ if (o_padsz > 0) {
+ memset(bp, 0, o_padsz);
+ bp = (void *) bp + o_padsz;
+ }
- callback->fid = *fid;
- callback->version = ntohl(*bp++);
- callback->expiry = ntohl(*bp++);
- callback->type = ntohl(*bp++);
-
- if (volsync) {
- volsync->creation = ntohl(*bp++);
- bp++; /* spare2 */
- bp++; /* spare3 */
- bp++; /* spare4 */
- bp++; /* spare5 */
- bp++; /* spare6 */
+ *bp++ = htonl(new_dvnode->fid.vid);
+ *bp++ = htonl(new_dvnode->fid.vnode);
+ *bp++ = htonl(new_dvnode->fid.unique);
+ *bp++ = htonl(n_namesz);
+ memcpy(bp, new_name, n_namesz);
+ bp = (void *) bp + n_namesz;
+ if (n_padsz > 0) {
+ memset(bp, 0, n_padsz);
+ bp = (void *) bp + n_padsz;
}
- /* success */
- ret = 0;
-
- out_unwait:
- set_current_state(TASK_RUNNING);
- remove_wait_queue(&call->waitq, &myself);
- rxrpc_put_call(call);
- out_put_conn:
- afs_server_release_fsconn(server, conn);
- out:
- kleave("");
- return ret;
-
- abort:
- set_current_state(TASK_UNINTERRUPTIBLE);
- rxrpc_call_abort(call, ret);
- schedule();
- goto out_unwait;
-} /* end afs_rxfs_lookup() */
-#endif
+ return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
+}
diff --git a/fs/afs/fsclient.h b/fs/afs/fsclient.h
deleted file mode 100644
index 8ba3e749ee3..00000000000
--- a/fs/afs/fsclient.h
+++ /dev/null
@@ -1,54 +0,0 @@
-/* fsclient.h: AFS File Server client stub declarations
- *
- * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#ifndef _LINUX_AFS_FSCLIENT_H
-#define _LINUX_AFS_FSCLIENT_H
-
-#include "server.h"
-
-extern int afs_rxfs_get_volume_info(struct afs_server *server,
- const char *name,
- struct afs_volume_info *vinfo);
-
-extern int afs_rxfs_fetch_file_status(struct afs_server *server,
- struct afs_vnode *vnode,
- struct afs_volsync *volsync);
-
-struct afs_rxfs_fetch_descriptor {
- struct afs_fid fid; /* file ID to fetch */
- size_t size; /* total number of bytes to fetch */
- off_t offset; /* offset in file to start from */
- void *buffer; /* read buffer */
- size_t actual; /* actual size sent back by server */
-};
-
-extern int afs_rxfs_fetch_file_data(struct afs_server *server,
- struct afs_vnode *vnode,
- struct afs_rxfs_fetch_descriptor *desc,
- struct afs_volsync *volsync);
-
-extern int afs_rxfs_give_up_callback(struct afs_server *server,
- struct afs_vnode *vnode);
-
-/* this doesn't appear to work in OpenAFS server */
-extern int afs_rxfs_lookup(struct afs_server *server,
- struct afs_vnode *dir,
- const char *filename,
- struct afs_vnode *vnode,
- struct afs_volsync *volsync);
-
-/* this is apparently mis-implemented in OpenAFS server */
-extern int afs_rxfs_get_root_volume(struct afs_server *server,
- char *buf,
- size_t *buflen);
-
-
-#endif /* _LINUX_AFS_FSCLIENT_H */
diff --git a/fs/afs/inode.c b/fs/afs/inode.c
index 9d9bca6c28b..c184a4ee599 100644
--- a/fs/afs/inode.c
+++ b/fs/afs/inode.c
@@ -19,9 +19,6 @@
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/pagemap.h>
-#include "volume.h"
-#include "vnode.h"
-#include "super.h"
#include "internal.h"
struct afs_iget_data {
@@ -29,26 +26,25 @@ struct afs_iget_data {
struct afs_volume *volume; /* volume on which resides */
};
-/*****************************************************************************/
/*
* map the AFS file status to the inode member variables
*/
-static int afs_inode_map_status(struct afs_vnode *vnode)
+static int afs_inode_map_status(struct afs_vnode *vnode, struct key *key)
{
struct inode *inode = AFS_VNODE_TO_I(vnode);
- _debug("FS: ft=%d lk=%d sz=%Zu ver=%Lu mod=%hu",
+ _debug("FS: ft=%d lk=%d sz=%llu ver=%Lu mod=%hu",
vnode->status.type,
vnode->status.nlink,
- vnode->status.size,
- vnode->status.version,
+ (unsigned long long) vnode->status.size,
+ vnode->status.data_version,
vnode->status.mode);
switch (vnode->status.type) {
case AFS_FTYPE_FILE:
inode->i_mode = S_IFREG | vnode->status.mode;
inode->i_op = &afs_file_inode_operations;
- inode->i_fop = &generic_ro_fops;
+ inode->i_fop = &afs_file_operations;
break;
case AFS_FTYPE_DIR:
inode->i_mode = S_IFDIR | vnode->status.mode;
@@ -77,9 +73,9 @@ static int afs_inode_map_status(struct afs_vnode *vnode)
/* check to see whether a symbolic link is really a mountpoint */
if (vnode->status.type == AFS_FTYPE_SYMLINK) {
- afs_mntpt_check_symlink(vnode);
+ afs_mntpt_check_symlink(vnode, key);
- if (vnode->flags & AFS_VNODE_MOUNTPOINT) {
+ if (test_bit(AFS_VNODE_MOUNTPOINT, &vnode->flags)) {
inode->i_mode = S_IFDIR | vnode->status.mode;
inode->i_op = &afs_mntpt_inode_operations;
inode->i_fop = &afs_mntpt_file_operations;
@@ -87,30 +83,8 @@ static int afs_inode_map_status(struct afs_vnode *vnode)
}
return 0;
-} /* end afs_inode_map_status() */
+}
-/*****************************************************************************/
-/*
- * attempt to fetch the status of an inode, coelescing multiple simultaneous
- * fetches
- */
-static int afs_inode_fetch_status(struct inode *inode)
-{
- struct afs_vnode *vnode;
- int ret;
-
- vnode = AFS_FS_I(inode);
-
- ret = afs_vnode_fetch_status(vnode);
-
- if (ret == 0)
- ret = afs_inode_map_status(vnode);
-
- return ret;
-
-} /* end afs_inode_fetch_status() */
-
-/*****************************************************************************/
/*
* iget5() comparator
*/
@@ -120,9 +94,8 @@ static int afs_iget5_test(struct inode *inode, void *opaque)
return inode->i_ino == data->fid.vnode &&
inode->i_version == data->fid.unique;
-} /* end afs_iget5_test() */
+}
-/*****************************************************************************/
/*
* iget5() inode initialiser
*/
@@ -137,14 +110,14 @@ static int afs_iget5_set(struct inode *inode, void *opaque)
vnode->volume = data->volume;
return 0;
-} /* end afs_iget5_set() */
+}
-/*****************************************************************************/
/*
* inode retrieval
*/
-inline int afs_iget(struct super_block *sb, struct afs_fid *fid,
- struct inode **_inode)
+struct inode *afs_iget(struct super_block *sb, struct key *key,
+ struct afs_fid *fid, struct afs_file_status *status,
+ struct afs_callback *cb)
{
struct afs_iget_data data = { .fid = *fid };
struct afs_super_info *as;
@@ -161,20 +134,18 @@ inline int afs_iget(struct super_block *sb, struct afs_fid *fid,
&data);
if (!inode) {
_leave(" = -ENOMEM");
- return -ENOMEM;
+ return ERR_PTR(-ENOMEM);
}
+ _debug("GOT INODE %p { vl=%x vn=%x, u=%x }",
+ inode, fid->vid, fid->vnode, fid->unique);
+
vnode = AFS_FS_I(inode);
/* deal with an existing inode */
if (!(inode->i_state & I_NEW)) {
- ret = afs_vnode_fetch_status(vnode);
- if (ret==0)
- *_inode = inode;
- else
- iput(inode);
- _leave(" = %d", ret);
- return ret;
+ _leave(" = %p", inode);
+ return inode;
}
#ifdef AFS_CACHING_SUPPORT
@@ -186,100 +157,185 @@ inline int afs_iget(struct super_block *sb, struct afs_fid *fid,
&vnode->cache);
#endif
- /* okay... it's a new inode */
- inode->i_flags |= S_NOATIME;
- vnode->flags |= AFS_VNODE_CHANGED;
- ret = afs_inode_fetch_status(inode);
- if (ret<0)
+ if (!status) {
+ /* it's a remotely extant inode */
+ set_bit(AFS_VNODE_CB_BROKEN, &vnode->flags);
+ ret = afs_vnode_fetch_status(vnode, NULL, key);
+ if (ret < 0)
+ goto bad_inode;
+ } else {
+ /* it's an inode we just created */
+ memcpy(&vnode->status, status, sizeof(vnode->status));
+
+ if (!cb) {
+ /* it's a symlink we just created (the fileserver
+ * didn't give us a callback) */
+ vnode->cb_version = 0;
+ vnode->cb_expiry = 0;
+ vnode->cb_type = 0;
+ vnode->cb_expires = get_seconds();
+ } else {
+ vnode->cb_version = cb->version;
+ vnode->cb_expiry = cb->expiry;
+ vnode->cb_type = cb->type;
+ vnode->cb_expires = vnode->cb_expiry + get_seconds();
+ }
+ }
+
+ ret = afs_inode_map_status(vnode, key);
+ if (ret < 0)
goto bad_inode;
/* success */
+ clear_bit(AFS_VNODE_UNSET, &vnode->flags);
+ inode->i_flags |= S_NOATIME;
unlock_new_inode(inode);
-
- *_inode = inode;
- _leave(" = 0 [CB { v=%u x=%lu t=%u }]",
- vnode->cb_version,
- vnode->cb_timeout.timo_jif,
- vnode->cb_type);
- return 0;
+ _leave(" = %p [CB { v=%u t=%u }]", inode, vnode->cb_version, vnode->cb_type);
+ return inode;
/* failure */
- bad_inode:
+bad_inode:
make_bad_inode(inode);
unlock_new_inode(inode);
iput(inode);
_leave(" = %d [bad]", ret);
+ return ERR_PTR(ret);
+}
+
+/*
+ * validate a vnode/inode
+ * - there are several things we need to check
+ * - parent dir data changes (rm, rmdir, rename, mkdir, create, link,
+ * symlink)
+ * - parent dir metadata changed (security changes)
+ * - dentry data changed (write, truncate)
+ * - dentry metadata changed (security changes)
+ */
+int afs_validate(struct afs_vnode *vnode, struct key *key)
+{
+ int ret;
+
+ _enter("{v={%x:%u} fl=%lx},%x",
+ vnode->fid.vid, vnode->fid.vnode, vnode->flags,
+ key_serial(key));
+
+ if (vnode->cb_promised &&
+ !test_bit(AFS_VNODE_CB_BROKEN, &vnode->flags) &&
+ !test_bit(AFS_VNODE_MODIFIED, &vnode->flags) &&
+ !test_bit(AFS_VNODE_ZAP_DATA, &vnode->flags)) {
+ if (vnode->cb_expires < get_seconds() + 10) {
+ _debug("callback expired");
+ set_bit(AFS_VNODE_CB_BROKEN, &vnode->flags);
+ } else {
+ goto valid;
+ }
+ }
+
+ if (test_bit(AFS_VNODE_DELETED, &vnode->flags))
+ goto valid;
+
+ mutex_lock(&vnode->validate_lock);
+
+ /* if the promise has expired, we need to check the server again to get
+ * a new promise - note that if the (parent) directory's metadata was
+ * changed then the security may be different and we may no longer have
+ * access */
+ if (!vnode->cb_promised ||
+ test_bit(AFS_VNODE_CB_BROKEN, &vnode->flags)) {
+ _debug("not promised");
+ ret = afs_vnode_fetch_status(vnode, NULL, key);
+ if (ret < 0)
+ goto error_unlock;
+ _debug("new promise [fl=%lx]", vnode->flags);
+ }
+
+ if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) {
+ _debug("file already deleted");
+ ret = -ESTALE;
+ goto error_unlock;
+ }
+
+ /* if the vnode's data version number changed then its contents are
+ * different */
+ if (test_and_clear_bit(AFS_VNODE_ZAP_DATA, &vnode->flags)) {
+ _debug("zap data {%x:%d}", vnode->fid.vid, vnode->fid.vnode);
+ invalidate_remote_inode(&vnode->vfs_inode);
+ }
+
+ clear_bit(AFS_VNODE_MODIFIED, &vnode->flags);
+ mutex_unlock(&vnode->validate_lock);
+valid:
+ _leave(" = 0");
+ return 0;
+
+error_unlock:
+ mutex_unlock(&vnode->validate_lock);
+ _leave(" = %d", ret);
return ret;
-} /* end afs_iget() */
+}
-/*****************************************************************************/
/*
* read the attributes of an inode
*/
int afs_inode_getattr(struct vfsmount *mnt, struct dentry *dentry,
struct kstat *stat)
{
- struct afs_vnode *vnode;
struct inode *inode;
- int ret;
inode = dentry->d_inode;
_enter("{ ino=%lu v=%lu }", inode->i_ino, inode->i_version);
- vnode = AFS_FS_I(inode);
-
- ret = afs_inode_fetch_status(inode);
- if (ret == -ENOENT) {
- _leave(" = %d [%d %p]",
- ret, atomic_read(&dentry->d_count), dentry->d_inode);
- return ret;
- }
- else if (ret < 0) {
- make_bad_inode(inode);
- _leave(" = %d", ret);
- return ret;
- }
-
- /* transfer attributes from the inode structure to the stat
- * structure */
generic_fillattr(inode, stat);
-
- _leave(" = 0 CB { v=%u x=%u t=%u }",
- vnode->cb_version,
- vnode->cb_expiry,
- vnode->cb_type);
-
return 0;
-} /* end afs_inode_getattr() */
+}
-/*****************************************************************************/
/*
* clear an AFS inode
*/
void afs_clear_inode(struct inode *inode)
{
+ struct afs_permits *permits;
struct afs_vnode *vnode;
vnode = AFS_FS_I(inode);
- _enter("ino=%lu { vn=%08x v=%u x=%u t=%u }",
- inode->i_ino,
+ _enter("{%x:%d.%d} v=%u x=%u t=%u }",
+ vnode->fid.vid,
vnode->fid.vnode,
+ vnode->fid.unique,
vnode->cb_version,
vnode->cb_expiry,
- vnode->cb_type
- );
+ vnode->cb_type);
- BUG_ON(inode->i_ino != vnode->fid.vnode);
+ _debug("CLEAR INODE %p", inode);
- afs_vnode_give_up_callback(vnode);
+ ASSERTCMP(inode->i_ino, ==, vnode->fid.vnode);
+
+ afs_give_up_callback(vnode);
+
+ if (vnode->server) {
+ spin_lock(&vnode->server->fs_lock);
+ rb_erase(&vnode->server_rb, &vnode->server->fs_vnodes);
+ spin_unlock(&vnode->server->fs_lock);
+ afs_put_server(vnode->server);
+ vnode->server = NULL;
+ }
+
+ ASSERT(!vnode->cb_promised);
#ifdef AFS_CACHING_SUPPORT
cachefs_relinquish_cookie(vnode->cache, 0);
vnode->cache = NULL;
#endif
+ mutex_lock(&vnode->permits_lock);
+ permits = vnode->permits;
+ rcu_assign_pointer(vnode->permits, NULL);
+ mutex_unlock(&vnode->permits_lock);
+ if (permits)
+ call_rcu(&permits->rcu, afs_zap_permits);
+
_leave("");
-} /* end afs_clear_inode() */
+}
diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index 5151d5da2c2..d90c158cd93 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -1,6 +1,6 @@
-/* internal.h: internal AFS stuff
+/* internal AFS stuff
*
- * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
+ * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
@@ -9,48 +9,390 @@
* 2 of the License, or (at your option) any later version.
*/
-#ifndef AFS_INTERNAL_H
-#define AFS_INTERNAL_H
-
#include <linux/compiler.h>
#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/pagemap.h>
+#include <linux/skbuff.h>
+#include <linux/rxrpc.h>
+#include <linux/key.h>
+#include "afs.h"
+#include "afs_vl.h"
+
+#define AFS_CELL_MAX_ADDRS 15
+
+struct afs_call;
+
+typedef enum {
+ AFS_VL_NEW, /* new, uninitialised record */
+ AFS_VL_CREATING, /* creating record */
+ AFS_VL_VALID, /* record is pending */
+ AFS_VL_NO_VOLUME, /* no such volume available */
+ AFS_VL_UPDATING, /* update in progress */
+ AFS_VL_VOLUME_DELETED, /* volume was deleted */
+ AFS_VL_UNCERTAIN, /* uncertain state (update failed) */
+} __attribute__((packed)) afs_vlocation_state_t;
+
+struct afs_mount_params {
+ bool rwpath; /* T if the parent should be considered R/W */
+ bool force; /* T to force cell type */
+ afs_voltype_t type; /* type of volume requested */
+ int volnamesz; /* size of volume name */
+ const char *volname; /* name of volume to mount */
+ struct afs_cell *cell; /* cell in which to find volume */
+ struct afs_volume *volume; /* volume record */
+ struct key *key; /* key to use for secure mounting */
+};
/*
- * debug tracing
+ * definition of how to wait for the completion of an operation
*/
-#define kenter(FMT, a...) printk("==> %s("FMT")\n",__FUNCTION__ , ## a)
-#define kleave(FMT, a...) printk("<== %s()"FMT"\n",__FUNCTION__ , ## a)
-#define kdebug(FMT, a...) printk(FMT"\n" , ## a)
-#define kproto(FMT, a...) printk("### "FMT"\n" , ## a)
-#define knet(FMT, a...) printk(FMT"\n" , ## a)
-
-#ifdef __KDEBUG
-#define _enter(FMT, a...) kenter(FMT , ## a)
-#define _leave(FMT, a...) kleave(FMT , ## a)
-#define _debug(FMT, a...) kdebug(FMT , ## a)
-#define _proto(FMT, a...) kproto(FMT , ## a)
-#define _net(FMT, a...) knet(FMT , ## a)
-#else
-#define _enter(FMT, a...) do { } while(0)
-#define _leave(FMT, a...) do { } while(0)
-#define _debug(FMT, a...) do { } while(0)
-#define _proto(FMT, a...) do { } while(0)
-#define _net(FMT, a...) do { } while(0)
-#endif
+struct afs_wait_mode {
+ /* RxRPC received message notification */
+ void (*rx_wakeup)(struct afs_call *call);
-static inline void afs_discard_my_signals(void)
-{
- while (signal_pending(current)) {
- siginfo_t sinfo;
+ /* synchronous call waiter and call dispatched notification */
+ int (*wait)(struct afs_call *call);
+
+ /* asynchronous call completion */
+ void (*async_complete)(void *reply, int error);
+};
+
+extern const struct afs_wait_mode afs_sync_call;
+extern const struct afs_wait_mode afs_async_call;
- spin_lock_irq(&current->sighand->siglock);
- dequeue_signal(current,&current->blocked, &sinfo);
- spin_unlock_irq(&current->sighand->siglock);
- }
+/*
+ * a record of an in-progress RxRPC call
+ */
+struct afs_call {
+ const struct afs_call_type *type; /* type of call */
+ const struct afs_wait_mode *wait_mode; /* completion wait mode */
+ wait_queue_head_t waitq; /* processes awaiting completion */
+ struct work_struct async_work; /* asynchronous work processor */
+ struct work_struct work; /* actual work processor */
+ struct sk_buff_head rx_queue; /* received packets */
+ struct rxrpc_call *rxcall; /* RxRPC call handle */
+ struct key *key; /* security for this call */
+ struct afs_server *server; /* server affected by incoming CM call */
+ void *request; /* request data (first part) */
+ void *request2; /* request data (second part) */
+ void *buffer; /* reply receive buffer */
+ void *reply; /* reply buffer (first part) */
+ void *reply2; /* reply buffer (second part) */
+ void *reply3; /* reply buffer (third part) */
+ void *reply4; /* reply buffer (fourth part) */
+ enum { /* call state */
+ AFS_CALL_REQUESTING, /* request is being sent for outgoing call */
+ AFS_CALL_AWAIT_REPLY, /* awaiting reply to outgoing call */
+ AFS_CALL_AWAIT_OP_ID, /* awaiting op ID on incoming call */
+ AFS_CALL_AWAIT_REQUEST, /* awaiting request data on incoming call */
+ AFS_CALL_REPLYING, /* replying to incoming call */
+ AFS_CALL_AWAIT_ACK, /* awaiting final ACK of incoming call */
+ AFS_CALL_COMPLETE, /* successfully completed */
+ AFS_CALL_BUSY, /* server was busy */
+ AFS_CALL_ABORTED, /* call was aborted */
+ AFS_CALL_ERROR, /* call failed due to error */
+ } state;
+ int error; /* error code */
+ unsigned request_size; /* size of request data */
+ unsigned reply_max; /* maximum size of reply */
+ unsigned reply_size; /* current size of reply */
+ unsigned short offset; /* offset into received data store */
+ unsigned char unmarshall; /* unmarshalling phase */
+ bool incoming; /* T if incoming call */
+ u16 service_id; /* RxRPC service ID to call */
+ __be16 port; /* target UDP port */
+ __be32 operation_ID; /* operation ID for an incoming call */
+ u32 count; /* count for use in unmarshalling */
+ __be32 tmp; /* place to extract temporary data */
+};
+
+struct afs_call_type {
+ const char *name;
+
+ /* deliver request or reply data to an call
+ * - returning an error will cause the call to be aborted
+ */
+ int (*deliver)(struct afs_call *call, struct sk_buff *skb,
+ bool last);
+
+ /* map an abort code to an error number */
+ int (*abort_to_error)(u32 abort_code);
+
+ /* clean up a call */
+ void (*destructor)(struct afs_call *call);
+};
+
+/*
+ * AFS superblock private data
+ * - there's one superblock per volume
+ */
+struct afs_super_info {
+ struct afs_volume *volume; /* volume record */
+ char rwparent; /* T if parent is R/W AFS volume */
+};
+
+static inline struct afs_super_info *AFS_FS_S(struct super_block *sb)
+{
+ return sb->s_fs_info;
}
+extern struct file_system_type afs_fs_type;
+
+/*
+ * entry in the cached cell catalogue
+ */
+struct afs_cache_cell {
+ char name[AFS_MAXCELLNAME]; /* cell name (padded with NULs) */
+ struct in_addr vl_servers[15]; /* cached cell VL servers */
+};
+
+/*
+ * AFS cell record
+ */
+struct afs_cell {
+ atomic_t usage;
+ struct list_head link; /* main cell list link */
+ struct key *anonymous_key; /* anonymous user key for this cell */
+ struct list_head proc_link; /* /proc cell list link */
+ struct proc_dir_entry *proc_dir; /* /proc dir for this cell */
+#ifdef AFS_CACHING_SUPPORT
+ struct cachefs_cookie *cache; /* caching cookie */
+#endif
+
+ /* server record management */
+ rwlock_t servers_lock; /* active server list lock */
+ struct list_head servers; /* active server list */
+
+ /* volume location record management */
+ struct rw_semaphore vl_sem; /* volume management serialisation semaphore */
+ struct list_head vl_list; /* cell's active VL record list */
+ spinlock_t vl_lock; /* vl_list lock */
+ unsigned short vl_naddrs; /* number of VL servers in addr list */
+ unsigned short vl_curr_svix; /* current server index */
+ struct in_addr vl_addrs[AFS_CELL_MAX_ADDRS]; /* cell VL server addresses */
+
+ char name[0]; /* cell name - must go last */
+};
+
+/*
+ * entry in the cached volume location catalogue
+ */
+struct afs_cache_vlocation {
+ /* volume name (lowercase, padded with NULs) */
+ uint8_t name[AFS_MAXVOLNAME + 1];
+
+ uint8_t nservers; /* number of entries used in servers[] */
+ uint8_t vidmask; /* voltype mask for vid[] */
+ uint8_t srvtmask[8]; /* voltype masks for servers[] */
+#define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */
+#define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */
+#define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */
+
+ afs_volid_t vid[3]; /* volume IDs for R/W, R/O and Bak volumes */
+ struct in_addr servers[8]; /* fileserver addresses */
+ time_t rtime; /* last retrieval time */
+};
+
+/*
+ * volume -> vnode hash table entry
+ */
+struct afs_cache_vhash {
+ afs_voltype_t vtype; /* which volume variation */
+ uint8_t hash_bucket; /* which hash bucket this represents */
+} __attribute__((packed));
+
+/*
+ * AFS volume location record
+ */
+struct afs_vlocation {
+ atomic_t usage;
+ time_t time_of_death; /* time at which put reduced usage to 0 */
+ struct list_head link; /* link in cell volume location list */
+ struct list_head grave; /* link in master graveyard list */
+ struct list_head update; /* link in master update list */
+ struct afs_cell *cell; /* cell to which volume belongs */
+#ifdef AFS_CACHING_SUPPORT
+ struct cachefs_cookie *cache; /* caching cookie */
+#endif
+ struct afs_cache_vlocation vldb; /* volume information DB record */
+ struct afs_volume *vols[3]; /* volume access record pointer (index by type) */
+ wait_queue_head_t waitq; /* status change waitqueue */
+ time_t update_at; /* time at which record should be updated */
+ spinlock_t lock; /* access lock */
+ afs_vlocation_state_t state; /* volume location state */
+ unsigned short upd_rej_cnt; /* ENOMEDIUM count during update */
+ unsigned short upd_busy_cnt; /* EBUSY count during update */
+ bool valid; /* T if valid */
+};
+
+/*
+ * AFS fileserver record
+ */
+struct afs_server {
+ atomic_t usage;
+ time_t time_of_death; /* time at which put reduced usage to 0 */
+ struct in_addr addr; /* server address */
+ struct afs_cell *cell; /* cell in which server resides */
+ struct list_head link; /* link in cell's server list */
+ struct list_head grave; /* link in master graveyard list */
+ struct rb_node master_rb; /* link in master by-addr tree */
+ struct rw_semaphore sem; /* access lock */
+
+ /* file service access */
+ struct rb_root fs_vnodes; /* vnodes backed by this server (ordered by FID) */
+ unsigned long fs_act_jif; /* time at which last activity occurred */
+ unsigned long fs_dead_jif; /* time at which no longer to be considered dead */
+ spinlock_t fs_lock; /* access lock */
+ int fs_state; /* 0 or reason FS currently marked dead (-errno) */
+
+ /* callback promise management */
+ struct rb_root cb_promises; /* vnode expiration list (ordered earliest first) */
+ struct delayed_work cb_updater; /* callback updater */
+ struct delayed_work cb_break_work; /* collected break dispatcher */
+ wait_queue_head_t cb_break_waitq; /* space available in cb_break waitqueue */
+ spinlock_t cb_lock; /* access lock */
+ struct afs_callback cb_break[64]; /* ring of callbacks awaiting breaking */
+ atomic_t cb_break_n; /* number of pending breaks */
+ u8 cb_break_head; /* head of callback breaking ring */
+ u8 cb_break_tail; /* tail of callback breaking ring */
+};
+
+/*
+ * AFS volume access record
+ */
+struct afs_volume {
+ atomic_t usage;
+ struct afs_cell *cell; /* cell to which belongs (unrefd ptr) */
+ struct afs_vlocation *vlocation; /* volume location */
+#ifdef AFS_CACHING_SUPPORT
+ struct cachefs_cookie *cache; /* caching cookie */
+#endif
+ afs_volid_t vid; /* volume ID */
+ afs_voltype_t type; /* type of volume */
+ char type_force; /* force volume type (suppress R/O -> R/W) */
+ unsigned short nservers; /* number of server slots filled */
+ unsigned short rjservers; /* number of servers discarded due to -ENOMEDIUM */
+ struct afs_server *servers[8]; /* servers on which volume resides (ordered) */
+ struct rw_semaphore server_sem; /* lock for accessing current server */
+};
+
+/*
+ * vnode catalogue entry
+ */
+struct afs_cache_vnode {
+ afs_vnodeid_t vnode_id; /* vnode ID */
+ unsigned vnode_unique; /* vnode ID uniquifier */
+ afs_dataversion_t data_version; /* data version */
+};
+
+/*
+ * AFS inode private data
+ */
+struct afs_vnode {
+ struct inode vfs_inode; /* the VFS's inode record */
+
+ struct afs_volume *volume; /* volume on which vnode resides */
+ struct afs_server *server; /* server currently supplying this file */
+ struct afs_fid fid; /* the file identifier for this inode */
+ struct afs_file_status status; /* AFS status info for this file */
+#ifdef AFS_CACHING_SUPPORT
+ struct cachefs_cookie *cache; /* caching cookie */
+#endif
+ struct afs_permits *permits; /* cache of permits so far obtained */
+ struct mutex permits_lock; /* lock for altering permits list */
+ struct mutex validate_lock; /* lock for validating this vnode */
+ wait_queue_head_t update_waitq; /* status fetch waitqueue */
+ int update_cnt; /* number of outstanding ops that will update the
+ * status */
+ spinlock_t lock; /* waitqueue/flags lock */
+ unsigned long flags;
+#define AFS_VNODE_CB_BROKEN 0 /* set if vnode's callback was broken */
+#define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */
+#define AFS_VNODE_MODIFIED 2 /* set if vnode's data modified */
+#define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */
+#define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */
+#define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */
+
+ long acl_order; /* ACL check count (callback break count) */
+
+ /* outstanding callback notification on this file */
+ struct rb_node server_rb; /* link in server->fs_vnodes */
+ struct rb_node cb_promise; /* link in server->cb_promises */
+ struct work_struct cb_broken_work; /* work to be done on callback break */
+ time_t cb_expires; /* time at which callback expires */
+ time_t cb_expires_at; /* time used to order cb_promise */
+ unsigned cb_version; /* callback version */
+ unsigned cb_expiry; /* callback expiry time */
+ afs_callback_type_t cb_type; /* type of callback */
+ bool cb_promised; /* true if promise still holds */
+};
+
+/*
+ * cached security record for one user's attempt to access a vnode
+ */
+struct afs_permit {
+ struct key *key; /* RxRPC ticket holding a security context */
+ afs_access_t access_mask; /* access mask for this key */
+};
+
+/*
+ * cache of security records from attempts to access a vnode
+ */
+struct afs_permits {
+ struct rcu_head rcu; /* disposal procedure */
+ int count; /* number of records */
+ struct afs_permit permits[0]; /* the permits so far examined */
+};
+
+/*
+ * record of one of a system's set of network interfaces
+ */
+struct afs_interface {
+ struct in_addr address; /* IPv4 address bound to interface */
+ struct in_addr netmask; /* netmask applied to address */
+ unsigned mtu; /* MTU of interface */
+};
+
+/*
+ * UUID definition [internet draft]
+ * - the timestamp is a 60-bit value, split 32/16/12, and goes in 100ns
+ * increments since midnight 15th October 1582
+ * - add AFS_UUID_TO_UNIX_TIME to convert unix time in 100ns units to UUID
+ * time
+ * - the clock sequence is a 14-bit counter to avoid duplicate times
+ */
+struct afs_uuid {
+ u32 time_low; /* low part of timestamp */
+ u16 time_mid; /* mid part of timestamp */
+ u16 time_hi_and_version; /* high part of timestamp and version */
+#define AFS_UUID_TO_UNIX_TIME 0x01b21dd213814000ULL
+#define AFS_UUID_TIMEHI_MASK 0x0fff
+#define AFS_UUID_VERSION_TIME 0x1000 /* time-based UUID */
+#define AFS_UUID_VERSION_NAME 0x3000 /* name-based UUID */
+#define AFS_UUID_VERSION_RANDOM 0x4000 /* (pseudo-)random generated UUID */
+ u8 clock_seq_hi_and_reserved; /* clock seq hi and variant */
+#define AFS_UUID_CLOCKHI_MASK 0x3f
+#define AFS_UUID_VARIANT_STD 0x80
+ u8 clock_seq_low; /* clock seq low */
+ u8 node[6]; /* spatially unique node ID (MAC addr) */
+};
+
+/*****************************************************************************/
+/*
+ * callback.c
+ */
+extern void afs_init_callback_state(struct afs_server *);
+extern void afs_broken_callback_work(struct work_struct *);
+extern void afs_break_callbacks(struct afs_server *, size_t,
+ struct afs_callback[]);
+extern void afs_discard_callback_on_delete(struct afs_vnode *);
+extern void afs_give_up_callback(struct afs_vnode *);
+extern void afs_dispatch_give_up_callbacks(struct work_struct *);
+extern void afs_flush_callback_breaks(struct afs_server *);
+extern int __init afs_callback_update_init(void);
+extern void afs_callback_update_kill(void);
+
/*
* cell.c
*/
@@ -60,57 +402,156 @@ extern struct list_head afs_proc_cells;
extern struct cachefs_index_def afs_cache_cell_index_def;
#endif
+#define afs_get_cell(C) do { atomic_inc(&(C)->usage); } while(0)
+extern int afs_cell_init(char *);
+extern struct afs_cell *afs_cell_create(const char *, char *);
+extern struct afs_cell *afs_cell_lookup(const char *, unsigned);
+extern struct afs_cell *afs_grab_cell(struct afs_cell *);
+extern void afs_put_cell(struct afs_cell *);
+extern void afs_cell_purge(void);
+
+/*
+ * cmservice.c
+ */
+extern bool afs_cm_incoming_call(struct afs_call *);
+
/*
* dir.c
*/
extern const struct inode_operations afs_dir_inode_operations;
extern const struct file_operations afs_dir_file_operations;
+extern int afs_permission(struct inode *, int, struct nameidata *);
+
/*
* file.c
*/
extern const struct address_space_operations afs_fs_aops;
extern const struct inode_operations afs_file_inode_operations;
+extern const struct file_operations afs_file_operations;
+
+extern int afs_open(struct inode *, struct file *);
+extern int afs_release(struct inode *, struct file *);
#ifdef AFS_CACHING_SUPPORT
-extern int afs_cache_get_page_cookie(struct page *page,
- struct cachefs_page **_page_cookie);
+extern int afs_cache_get_page_cookie(struct page *, struct cachefs_page **);
#endif
/*
- * inode.c
+ * fsclient.c
*/
-extern int afs_iget(struct super_block *sb, struct afs_fid *fid,
- struct inode **_inode);
-extern int afs_inode_getattr(struct vfsmount *mnt, struct dentry *dentry,
- struct kstat *stat);
-extern void afs_clear_inode(struct inode *inode);
+extern int afs_fs_fetch_file_status(struct afs_server *, struct key *,
+ struct afs_vnode *, struct afs_volsync *,
+ const struct afs_wait_mode *);
+extern int afs_fs_give_up_callbacks(struct afs_server *,
+ const struct afs_wait_mode *);
+extern int afs_fs_fetch_data(struct afs_server *, struct key *,
+ struct afs_vnode *, off_t, size_t, struct page *,
+ const struct afs_wait_mode *);
+extern int afs_fs_create(struct afs_server *, struct key *,
+ struct afs_vnode *, const char *, umode_t,
+ struct afs_fid *, struct afs_file_status *,
+ struct afs_callback *,
+ const struct afs_wait_mode *);
+extern int afs_fs_remove(struct afs_server *, struct key *,
+ struct afs_vnode *, const char *, bool,
+ const struct afs_wait_mode *);
+extern int afs_fs_link(struct afs_server *, struct key *, struct afs_vnode *,
+ struct afs_vnode *, const char *,
+ const struct afs_wait_mode *);
+extern int afs_fs_symlink(struct afs_server *, struct key *,
+ struct afs_vnode *, const char *, const char *,
+ struct afs_fid *, struct afs_file_status *,
+ const struct afs_wait_mode *);
+extern int afs_fs_rename(struct afs_server *, struct key *,
+ struct afs_vnode *, const char *,
+ struct afs_vnode *, const char *,
+ const struct afs_wait_mode *);
/*
- * key_afs.c
+ * inode.c
*/
-#ifdef CONFIG_KEYS
-extern int afs_key_register(void);
-extern void afs_key_unregister(void);
-#endif
+extern struct inode *afs_iget(struct super_block *, struct key *,
+ struct afs_fid *, struct afs_file_status *,
+ struct afs_callback *);
+extern int afs_validate(struct afs_vnode *, struct key *);
+extern int afs_inode_getattr(struct vfsmount *, struct dentry *,
+ struct kstat *);
+extern void afs_zap_permits(struct rcu_head *);
+extern void afs_clear_inode(struct inode *);
/*
* main.c
*/
+extern struct afs_uuid afs_uuid;
#ifdef AFS_CACHING_SUPPORT
extern struct cachefs_netfs afs_cache_netfs;
#endif
/*
+ * misc.c
+ */
+extern int afs_abort_to_error(u32);
+
+/*
* mntpt.c
*/
extern const struct inode_operations afs_mntpt_inode_operations;
extern const struct file_operations afs_mntpt_file_operations;
-extern struct afs_timer afs_mntpt_expiry_timer;
-extern struct afs_timer_ops afs_mntpt_expiry_timer_ops;
extern unsigned long afs_mntpt_expiry_timeout;
-extern int afs_mntpt_check_symlink(struct afs_vnode *vnode);
+extern int afs_mntpt_check_symlink(struct afs_vnode *, struct key *);
+extern void afs_mntpt_kill_timer(void);
+extern void afs_umount_begin(struct vfsmount *, int);
+
+/*
+ * proc.c
+ */
+extern int afs_proc_init(void);
+extern void afs_proc_cleanup(void);
+extern int afs_proc_cell_setup(struct afs_cell *);
+extern void afs_proc_cell_remove(struct afs_cell *);
+
+/*
+ * rxrpc.c
+ */
+extern int afs_open_socket(void);
+extern void afs_close_socket(void);
+extern int afs_make_call(struct in_addr *, struct afs_call *, gfp_t,
+ const struct afs_wait_mode *);
+extern struct afs_call *afs_alloc_flat_call(const struct afs_call_type *,
+ size_t, size_t);
+extern void afs_flat_call_destructor(struct afs_call *);
+extern void afs_transfer_reply(struct afs_call *, struct sk_buff *);
+extern void afs_send_empty_reply(struct afs_call *);
+extern void afs_send_simple_reply(struct afs_call *, const void *, size_t);
+extern int afs_extract_data(struct afs_call *, struct sk_buff *, bool, void *,
+ size_t);
+
+/*
+ * security.c
+ */
+extern void afs_clear_permits(struct afs_vnode *);
+extern void afs_cache_permit(struct afs_vnode *, struct key *, long);
+extern struct key *afs_request_key(struct afs_cell *);
+extern int afs_permission(struct inode *, int, struct nameidata *);
+
+/*
+ * server.c
+ */
+extern spinlock_t afs_server_peer_lock;
+
+#define afs_get_server(S) \
+do { \
+ _debug("GET SERVER %d", atomic_read(&(S)->usage)); \
+ atomic_inc(&(S)->usage); \
+} while(0)
+
+extern struct afs_server *afs_lookup_server(struct afs_cell *,
+ const struct in_addr *);
+extern struct afs_server *afs_find_server(const struct in_addr *);
+extern void afs_put_server(struct afs_server *);
+extern void __exit afs_purge_servers(void);
/*
* super.c
@@ -118,22 +559,211 @@ extern int afs_mntpt_check_symlink(struct afs_vnode *vnode);
extern int afs_fs_init(void);
extern void afs_fs_exit(void);
-#define AFS_CB_HASH_COUNT (PAGE_SIZE / sizeof(struct list_head))
+/*
+ * use-rtnetlink.c
+ */
+extern int afs_get_ipv4_interfaces(struct afs_interface *, size_t, bool);
+extern int afs_get_MAC_address(u8 *, size_t);
-extern struct list_head afs_cb_hash_tbl[];
-extern spinlock_t afs_cb_hash_lock;
+/*
+ * vlclient.c
+ */
+#ifdef AFS_CACHING_SUPPORT
+extern struct cachefs_index_def afs_vlocation_cache_index_def;
+#endif
-#define afs_cb_hash(SRV,FID) \
- afs_cb_hash_tbl[((unsigned long)(SRV) + \
- (FID)->vid + (FID)->vnode + (FID)->unique) % \
- AFS_CB_HASH_COUNT]
+extern int afs_vl_get_entry_by_name(struct in_addr *, struct key *,
+ const char *, struct afs_cache_vlocation *,
+ const struct afs_wait_mode *);
+extern int afs_vl_get_entry_by_id(struct in_addr *, struct key *,
+ afs_volid_t, afs_voltype_t,
+ struct afs_cache_vlocation *,
+ const struct afs_wait_mode *);
/*
- * proc.c
+ * vlocation.c
*/
-extern int afs_proc_init(void);
-extern void afs_proc_cleanup(void);
-extern int afs_proc_cell_setup(struct afs_cell *cell);
-extern void afs_proc_cell_remove(struct afs_cell *cell);
+#define afs_get_vlocation(V) do { atomic_inc(&(V)->usage); } while(0)
+
+extern int __init afs_vlocation_update_init(void);
+extern struct afs_vlocation *afs_vlocation_lookup(struct afs_cell *,
+ struct key *,
+ const char *, size_t);
+extern void afs_put_vlocation(struct afs_vlocation *);
+extern void afs_vlocation_purge(void);
+
+/*
+ * vnode.c
+ */
+#ifdef AFS_CACHING_SUPPORT
+extern struct cachefs_index_def afs_vnode_cache_index_def;
+#endif
+
+extern struct afs_timer_ops afs_vnode_cb_timed_out_ops;
+
+static inline struct afs_vnode *AFS_FS_I(struct inode *inode)
+{
+ return container_of(inode, struct afs_vnode, vfs_inode);
+}
+
+static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode)
+{
+ return &vnode->vfs_inode;
+}
+
+extern void afs_vnode_finalise_status_update(struct afs_vnode *,
+ struct afs_server *);
+extern int afs_vnode_fetch_status(struct afs_vnode *, struct afs_vnode *,
+ struct key *);
+extern int afs_vnode_fetch_data(struct afs_vnode *, struct key *,
+ off_t, size_t, struct page *);
+extern int afs_vnode_create(struct afs_vnode *, struct key *, const char *,
+ umode_t, struct afs_fid *, struct afs_file_status *,
+ struct afs_callback *, struct afs_server **);
+extern int afs_vnode_remove(struct afs_vnode *, struct key *, const char *,
+ bool);
+extern int afs_vnode_link(struct afs_vnode *, struct afs_vnode *, struct key *,
+ const char *);
+extern int afs_vnode_symlink(struct afs_vnode *, struct key *, const char *,
+ const char *, struct afs_fid *,
+ struct afs_file_status *, struct afs_server **);
+extern int afs_vnode_rename(struct afs_vnode *, struct afs_vnode *,
+ struct key *, const char *, const char *);
+
+/*
+ * volume.c
+ */
+#ifdef AFS_CACHING_SUPPORT
+extern struct cachefs_index_def afs_volume_cache_index_def;
+#endif
+
+#define afs_get_volume(V) do { atomic_inc(&(V)->usage); } while(0)
+
+extern void afs_put_volume(struct afs_volume *);
+extern struct afs_volume *afs_volume_lookup(struct afs_mount_params *);
+extern struct afs_server *afs_volume_pick_fileserver(struct afs_vnode *);
+extern int afs_volume_release_fileserver(struct afs_vnode *,
+ struct afs_server *, int);
+
+/*****************************************************************************/
+/*
+ * debug tracing
+ */
+extern unsigned afs_debug;
+
+#define dbgprintk(FMT,...) \
+ printk("[%x%-6.6s] "FMT"\n", smp_processor_id(), current->comm ,##__VA_ARGS__)
+
+/* make sure we maintain the format strings, even when debugging is disabled */
+static inline __attribute__((format(printf,1,2)))
+void _dbprintk(const char *fmt, ...)
+{
+}
+
+#define kenter(FMT,...) dbgprintk("==> %s("FMT")",__FUNCTION__ ,##__VA_ARGS__)
+#define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__FUNCTION__ ,##__VA_ARGS__)
+#define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
+
+
+#if defined(__KDEBUG)
+#define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
+#define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
+#define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
+
+#elif defined(CONFIG_AFS_DEBUG)
+#define AFS_DEBUG_KENTER 0x01
+#define AFS_DEBUG_KLEAVE 0x02
+#define AFS_DEBUG_KDEBUG 0x04
+
+#define _enter(FMT,...) \
+do { \
+ if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \
+ kenter(FMT,##__VA_ARGS__); \
+} while (0)
+
+#define _leave(FMT,...) \
+do { \
+ if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \
+ kleave(FMT,##__VA_ARGS__); \
+} while (0)
+
+#define _debug(FMT,...) \
+do { \
+ if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \
+ kdebug(FMT,##__VA_ARGS__); \
+} while (0)
+
+#else
+#define _enter(FMT,...) _dbprintk("==> %s("FMT")",__FUNCTION__ ,##__VA_ARGS__)
+#define _leave(FMT,...) _dbprintk("<== %s()"FMT"",__FUNCTION__ ,##__VA_ARGS__)
+#define _debug(FMT,...) _dbprintk(" "FMT ,##__VA_ARGS__)
+#endif
+
+/*
+ * debug assertion checking
+ */
+#if 1 // defined(__KDEBUGALL)
+
+#define ASSERT(X) \
+do { \
+ if (unlikely(!(X))) { \
+ printk(KERN_ERR "\n"); \
+ printk(KERN_ERR "AFS: Assertion failed\n"); \
+ BUG(); \
+ } \
+} while(0)
+
+#define ASSERTCMP(X, OP, Y) \
+do { \
+ if (unlikely(!((X) OP (Y)))) { \
+ printk(KERN_ERR "\n"); \
+ printk(KERN_ERR "AFS: Assertion failed\n"); \
+ printk(KERN_ERR "%lu " #OP " %lu is false\n", \
+ (unsigned long)(X), (unsigned long)(Y)); \
+ printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
+ (unsigned long)(X), (unsigned long)(Y)); \
+ BUG(); \
+ } \
+} while(0)
+
+#define ASSERTIF(C, X) \
+do { \
+ if (unlikely((C) && !(X))) { \
+ printk(KERN_ERR "\n"); \
+ printk(KERN_ERR "AFS: Assertion failed\n"); \
+ BUG(); \
+ } \
+} while(0)
+
+#define ASSERTIFCMP(C, X, OP, Y) \
+do { \
+ if (unlikely((C) && !((X) OP (Y)))) { \
+ printk(KERN_ERR "\n"); \
+ printk(KERN_ERR "AFS: Assertion failed\n"); \
+ printk(KERN_ERR "%lu " #OP " %lu is false\n", \
+ (unsigned long)(X), (unsigned long)(Y)); \
+ printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
+ (unsigned long)(X), (unsigned long)(Y)); \
+ BUG(); \
+ } \
+} while(0)
+
+#else
+
+#define ASSERT(X) \
+do { \
+} while(0)
+
+#define ASSERTCMP(X, OP, Y) \
+do { \
+} while(0)
+
+#define ASSERTIF(C, X) \
+do { \
+} while(0)
+
+#define ASSERTIFCMP(C, X, OP, Y) \
+do { \
+} while(0)
-#endif /* AFS_INTERNAL_H */
+#endif /* __KDEBUGALL */
diff --git a/fs/afs/kafsasyncd.c b/fs/afs/kafsasyncd.c
deleted file mode 100644
index 615df2407cb..00000000000
--- a/fs/afs/kafsasyncd.c
+++ /dev/null
@@ -1,255 +0,0 @@
-/* kafsasyncd.c: AFS asynchronous operation daemon
- *
- * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- *
- * The AFS async daemon is used to the following:
- * - probe "dead" servers to see whether they've come back to life yet.
- * - probe "live" servers that we haven't talked to for a while to see if they are better
- * candidates for serving than what we're currently using
- * - poll volume location servers to keep up to date volume location lists
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/sched.h>
-#include <linux/completion.h>
-#include <linux/freezer.h>
-#include "cell.h"
-#include "server.h"
-#include "volume.h"
-#include "kafsasyncd.h"
-#include "kafstimod.h"
-#include <rxrpc/call.h>
-#include <asm/errno.h>
-#include "internal.h"
-
-static DECLARE_COMPLETION(kafsasyncd_alive);
-static DECLARE_COMPLETION(kafsasyncd_dead);
-static DECLARE_WAIT_QUEUE_HEAD(kafsasyncd_sleepq);
-static struct task_struct *kafsasyncd_task;
-static int kafsasyncd_die;
-
-static int kafsasyncd(void *arg);
-
-static LIST_HEAD(kafsasyncd_async_attnq);
-static LIST_HEAD(kafsasyncd_async_busyq);
-static DEFINE_SPINLOCK(kafsasyncd_async_lock);
-
-static void kafsasyncd_null_call_attn_func(struct rxrpc_call *call)
-{
-}
-
-static void kafsasyncd_null_call_error_func(struct rxrpc_call *call)
-{
-}
-
-/*****************************************************************************/
-/*
- * start the async daemon
- */
-int afs_kafsasyncd_start(void)
-{
- int ret;
-
- ret = kernel_thread(kafsasyncd, NULL, 0);
- if (ret < 0)
- return ret;
-
- wait_for_completion(&kafsasyncd_alive);
-
- return ret;
-} /* end afs_kafsasyncd_start() */
-
-/*****************************************************************************/
-/*
- * stop the async daemon
- */
-void afs_kafsasyncd_stop(void)
-{
- /* get rid of my daemon */
- kafsasyncd_die = 1;
- wake_up(&kafsasyncd_sleepq);
- wait_for_completion(&kafsasyncd_dead);
-
-} /* end afs_kafsasyncd_stop() */
-
-/*****************************************************************************/
-/*
- * probing daemon
- */
-static int kafsasyncd(void *arg)
-{
- struct afs_async_op *op;
- int die;
-
- DECLARE_WAITQUEUE(myself, current);
-
- kafsasyncd_task = current;
-
- printk("kAFS: Started kafsasyncd %d\n", current->pid);
-
- daemonize("kafsasyncd");
-
- complete(&kafsasyncd_alive);
-
- /* loop around looking for things to attend to */
- do {
- set_current_state(TASK_INTERRUPTIBLE);
- add_wait_queue(&kafsasyncd_sleepq, &myself);
-
- for (;;) {
- if (!list_empty(&kafsasyncd_async_attnq) ||
- signal_pending(current) ||
- kafsasyncd_die)
- break;
-
- schedule();
- set_current_state(TASK_INTERRUPTIBLE);
- }
-
- remove_wait_queue(&kafsasyncd_sleepq, &myself);
- set_current_state(TASK_RUNNING);
-
- try_to_freeze();
-
- /* discard pending signals */
- afs_discard_my_signals();
-
- die = kafsasyncd_die;
-
- /* deal with the next asynchronous operation requiring
- * attention */
- if (!list_empty(&kafsasyncd_async_attnq)) {
- struct afs_async_op *op;
-
- _debug("@@@ Begin Asynchronous Operation");
-
- op = NULL;
- spin_lock(&kafsasyncd_async_lock);
-
- if (!list_empty(&kafsasyncd_async_attnq)) {
- op = list_entry(kafsasyncd_async_attnq.next,
- struct afs_async_op, link);
- list_move_tail(&op->link,
- &kafsasyncd_async_busyq);
- }
-
- spin_unlock(&kafsasyncd_async_lock);
-
- _debug("@@@ Operation %p {%p}\n",
- op, op ? op->ops : NULL);
-
- if (op)
- op->ops->attend(op);
-
- _debug("@@@ End Asynchronous Operation");
- }
-
- } while(!die);
-
- /* need to kill all outstanding asynchronous operations before
- * exiting */
- kafsasyncd_task = NULL;
- spin_lock(&kafsasyncd_async_lock);
-
- /* fold the busy and attention queues together */
- list_splice_init(&kafsasyncd_async_busyq,
- &kafsasyncd_async_attnq);
-
- /* dequeue kafsasyncd from all their wait queues */
- list_for_each_entry(op, &kafsasyncd_async_attnq, link) {
- op->call->app_attn_func = kafsasyncd_null_call_attn_func;
- op->call->app_error_func = kafsasyncd_null_call_error_func;
- remove_wait_queue(&op->call->waitq, &op->waiter);
- }
-
- spin_unlock(&kafsasyncd_async_lock);
-
- /* abort all the operations */
- while (!list_empty(&kafsasyncd_async_attnq)) {
- op = list_entry(kafsasyncd_async_attnq.next, struct afs_async_op, link);
- list_del_init(&op->link);
-
- rxrpc_call_abort(op->call, -EIO);
- rxrpc_put_call(op->call);
- op->call = NULL;
-
- op->ops->discard(op);
- }
-
- /* and that's all */
- _leave("");
- complete_and_exit(&kafsasyncd_dead, 0);
-
-} /* end kafsasyncd() */
-
-/*****************************************************************************/
-/*
- * begin an operation
- * - place operation on busy queue
- */
-void afs_kafsasyncd_begin_op(struct afs_async_op *op)
-{
- _enter("");
-
- spin_lock(&kafsasyncd_async_lock);
-
- init_waitqueue_entry(&op->waiter, kafsasyncd_task);
- add_wait_queue(&op->call->waitq, &op->waiter);
-
- list_move_tail(&op->link, &kafsasyncd_async_busyq);
-
- spin_unlock(&kafsasyncd_async_lock);
-
- _leave("");
-} /* end afs_kafsasyncd_begin_op() */
-
-/*****************************************************************************/
-/*
- * request attention for an operation
- * - move to attention queue
- */
-void afs_kafsasyncd_attend_op(struct afs_async_op *op)
-{
- _enter("");
-
- spin_lock(&kafsasyncd_async_lock);
-
- list_move_tail(&op->link, &kafsasyncd_async_attnq);
-
- spin_unlock(&kafsasyncd_async_lock);
-
- wake_up(&kafsasyncd_sleepq);
-
- _leave("");
-} /* end afs_kafsasyncd_attend_op() */
-
-/*****************************************************************************/
-/*
- * terminate an operation
- * - remove from either queue
- */
-void afs_kafsasyncd_terminate_op(struct afs_async_op *op)
-{
- _enter("");
-
- spin_lock(&kafsasyncd_async_lock);
-
- if (!list_empty(&op->link)) {
- list_del_init(&op->link);
- remove_wait_queue(&op->call->waitq, &op->waiter);
- }
-
- spin_unlock(&kafsasyncd_async_lock);
-
- wake_up(&kafsasyncd_sleepq);
-
- _leave("");
-} /* end afs_kafsasyncd_terminate_op() */
diff --git a/fs/afs/kafsasyncd.h b/fs/afs/kafsasyncd.h
deleted file mode 100644
index 791803f9a6f..00000000000
--- a/fs/afs/kafsasyncd.h
+++ /dev/null
@@ -1,52 +0,0 @@
-/* kafsasyncd.h: AFS asynchronous operation daemon
- *
- * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#ifndef _LINUX_AFS_KAFSASYNCD_H
-#define _LINUX_AFS_KAFSASYNCD_H
-
-#include "types.h"
-
-struct afs_async_op;
-
-struct afs_async_op_ops {
- void (*attend)(struct afs_async_op *op);
- void (*discard)(struct afs_async_op *op);
-};
-
-/*****************************************************************************/
-/*
- * asynchronous operation record
- */
-struct afs_async_op
-{
- struct list_head link;
- struct afs_server *server; /* server being contacted */
- struct rxrpc_call *call; /* RxRPC call performing op */
- wait_queue_t waiter; /* wait queue for kafsasyncd */
- const struct afs_async_op_ops *ops; /* operations */
-};
-
-static inline void afs_async_op_init(struct afs_async_op *op,
- const struct afs_async_op_ops *ops)
-{
- INIT_LIST_HEAD(&op->link);
- op->call = NULL;
- op->ops = ops;
-}
-
-extern int afs_kafsasyncd_start(void);
-extern void afs_kafsasyncd_stop(void);
-
-extern void afs_kafsasyncd_begin_op(struct afs_async_op *op);
-extern void afs_kafsasyncd_attend_op(struct afs_async_op *op);
-extern void afs_kafsasyncd_terminate_op(struct afs_async_op *op);
-
-#endif /* _LINUX_AFS_KAFSASYNCD_H */
diff --git a/fs/afs/kafstimod.c b/fs/afs/kafstimod.c
deleted file mode 100644
index 694344e4d3c..00000000000
--- a/fs/afs/kafstimod.c
+++ /dev/null
@@ -1,205 +0,0 @@
-/* kafstimod.c: AFS timeout daemon
- *
- * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/sched.h>
-#include <linux/completion.h>
-#include <linux/freezer.h>
-#include "cell.h"
-#include "volume.h"
-#include "kafstimod.h"
-#include <asm/errno.h>
-#include "internal.h"
-
-static DECLARE_COMPLETION(kafstimod_alive);
-static DECLARE_COMPLETION(kafstimod_dead);
-static DECLARE_WAIT_QUEUE_HEAD(kafstimod_sleepq);
-static int kafstimod_die;
-
-static LIST_HEAD(kafstimod_list);
-static DEFINE_SPINLOCK(kafstimod_lock);
-
-static int kafstimod(void *arg);
-
-/*****************************************************************************/
-/*
- * start the timeout daemon
- */
-int afs_kafstimod_start(void)
-{
- int ret;
-
- ret = kernel_thread(kafstimod, NULL, 0);
- if (ret < 0)
- return ret;
-
- wait_for_completion(&kafstimod_alive);
-
- return ret;
-} /* end afs_kafstimod_start() */
-
-/*****************************************************************************/
-/*
- * stop the timeout daemon
- */
-void afs_kafstimod_stop(void)
-{
- /* get rid of my daemon */
- kafstimod_die = 1;
- wake_up(&kafstimod_sleepq);
- wait_for_completion(&kafstimod_dead);
-
-} /* end afs_kafstimod_stop() */
-
-/*****************************************************************************/
-/*
- * timeout processing daemon
- */
-static int kafstimod(void *arg)
-{
- struct afs_timer *timer;
-
- DECLARE_WAITQUEUE(myself, current);
-
- printk("kAFS: Started kafstimod %d\n", current->pid);
-
- daemonize("kafstimod");
-
- complete(&kafstimod_alive);
-
- /* loop around looking for things to attend to */
- loop:
- set_current_state(TASK_INTERRUPTIBLE);
- add_wait_queue(&kafstimod_sleepq, &myself);
-
- for (;;) {
- unsigned long jif;
- signed long timeout;
-
- /* deal with the server being asked to die */
- if (kafstimod_die) {
- remove_wait_queue(&kafstimod_sleepq, &myself);
- _leave("");
- complete_and_exit(&kafstimod_dead, 0);
- }
-
- try_to_freeze();
-
- /* discard pending signals */
- afs_discard_my_signals();
-
- /* work out the time to elapse before the next event */
- spin_lock(&kafstimod_lock);
- if (list_empty(&kafstimod_list)) {
- timeout = MAX_SCHEDULE_TIMEOUT;
- }
- else {
- timer = list_entry(kafstimod_list.next,
- struct afs_timer, link);
- timeout = timer->timo_jif;
- jif = jiffies;
-
- if (time_before_eq((unsigned long) timeout, jif))
- goto immediate;
-
- else {
- timeout = (long) timeout - (long) jiffies;
- }
- }
- spin_unlock(&kafstimod_lock);
-
- schedule_timeout(timeout);
-
- set_current_state(TASK_INTERRUPTIBLE);
- }
-
- /* the thing on the front of the queue needs processing
- * - we come here with the lock held and timer pointing to the expired
- * entry
- */
- immediate:
- remove_wait_queue(&kafstimod_sleepq, &myself);
- set_current_state(TASK_RUNNING);
-
- _debug("@@@ Begin Timeout of %p", timer);
-
- /* dequeue the timer */
- list_del_init(&timer->link);
- spin_unlock(&kafstimod_lock);
-
- /* call the timeout function */
- timer->ops->timed_out(timer);
-
- _debug("@@@ End Timeout");
- goto loop;
-
-} /* end kafstimod() */
-
-/*****************************************************************************/
-/*
- * (re-)queue a timer
- */
-void afs_kafstimod_add_timer(struct afs_timer *timer, unsigned long timeout)
-{
- struct afs_timer *ptimer;
- struct list_head *_p;
-
- _enter("%p,%lu", timer, timeout);
-
- spin_lock(&kafstimod_lock);
-
- list_del(&timer->link);
-
- /* the timer was deferred or reset - put it back in the queue at the
- * right place */
- timer->timo_jif = jiffies + timeout;
-
- list_for_each(_p, &kafstimod_list) {
- ptimer = list_entry(_p, struct afs_timer, link);
- if (time_before(timer->timo_jif, ptimer->timo_jif))
- break;
- }
-
- list_add_tail(&timer->link, _p); /* insert before stopping point */
-
- spin_unlock(&kafstimod_lock);
-
- wake_up(&kafstimod_sleepq);
-
- _leave("");
-} /* end afs_kafstimod_add_timer() */
-
-/*****************************************************************************/
-/*
- * dequeue a timer
- * - returns 0 if the timer was deleted or -ENOENT if it wasn't queued
- */
-int afs_kafstimod_del_timer(struct afs_timer *timer)
-{
- int ret = 0;
-
- _enter("%p", timer);
-
- spin_lock(&kafstimod_lock);
-
- if (list_empty(&timer->link))
- ret = -ENOENT;
- else
- list_del_init(&timer->link);
-
- spin_unlock(&kafstimod_lock);
-
- wake_up(&kafstimod_sleepq);
-
- _leave(" = %d", ret);
- return ret;
-} /* end afs_kafstimod_del_timer() */
diff --git a/fs/afs/kafstimod.h b/fs/afs/kafstimod.h
deleted file mode 100644
index e312f1a61a7..00000000000
--- a/fs/afs/kafstimod.h
+++ /dev/null
@@ -1,49 +0,0 @@
-/* kafstimod.h: AFS timeout daemon
- *
- * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#ifndef _LINUX_AFS_KAFSTIMOD_H
-#define _LINUX_AFS_KAFSTIMOD_H
-
-#include "types.h"
-
-struct afs_timer;
-
-struct afs_timer_ops {
- /* called when the front of the timer queue has timed out */
- void (*timed_out)(struct afs_timer *timer);
-};
-
-/*****************************************************************************/
-/*
- * AFS timer/timeout record
- */
-struct afs_timer
-{
- struct list_head link; /* link in timer queue */
- unsigned long timo_jif; /* timeout time */
- const struct afs_timer_ops *ops; /* timeout expiry function */
-};
-
-static inline void afs_timer_init(struct afs_timer *timer,
- const struct afs_timer_ops *ops)
-{
- INIT_LIST_HEAD(&timer->link);
- timer->ops = ops;
-}
-
-extern int afs_kafstimod_start(void);
-extern void afs_kafstimod_stop(void);
-
-extern void afs_kafstimod_add_timer(struct afs_timer *timer,
- unsigned long timeout);
-extern int afs_kafstimod_del_timer(struct afs_timer *timer);
-
-#endif /* _LINUX_AFS_KAFSTIMOD_H */
diff --git a/fs/afs/main.c b/fs/afs/main.c
index f2704ba5385..80ec6fd19a7 100644
--- a/fs/afs/main.c
+++ b/fs/afs/main.c
@@ -1,4 +1,4 @@
-/* main.c: AFS client file system
+/* AFS client file system
*
* Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
@@ -13,43 +13,21 @@
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/completion.h>
-#include <rxrpc/rxrpc.h>
-#include <rxrpc/transport.h>
-#include <rxrpc/call.h>
-#include <rxrpc/peer.h>
-#include "cache.h"
-#include "cell.h"
-#include "server.h"
-#include "fsclient.h"
-#include "cmservice.h"
-#include "kafstimod.h"
-#include "kafsasyncd.h"
#include "internal.h"
-struct rxrpc_transport *afs_transport;
-
-static int afs_adding_peer(struct rxrpc_peer *peer);
-static void afs_discarding_peer(struct rxrpc_peer *peer);
-
-
MODULE_DESCRIPTION("AFS Client File System");
MODULE_AUTHOR("Red Hat, Inc.");
MODULE_LICENSE("GPL");
+unsigned afs_debug;
+module_param_named(debug, afs_debug, uint, S_IWUSR | S_IRUGO);
+MODULE_PARM_DESC(afs_debug, "AFS debugging mask");
+
static char *rootcell;
module_param(rootcell, charp, 0);
MODULE_PARM_DESC(rootcell, "root AFS cell name and VL server IP addr list");
-
-static struct rxrpc_peer_ops afs_peer_ops = {
- .adding = afs_adding_peer,
- .discarding = afs_discarding_peer,
-};
-
-struct list_head afs_cb_hash_tbl[AFS_CB_HASH_COUNT];
-DEFINE_SPINLOCK(afs_cb_hash_lock);
-
#ifdef AFS_CACHING_SUPPORT
static struct cachefs_netfs_operations afs_cache_ops = {
.get_page_cookie = afs_cache_get_page_cookie,
@@ -62,20 +40,63 @@ struct cachefs_netfs afs_cache_netfs = {
};
#endif
-/*****************************************************************************/
+struct afs_uuid afs_uuid;
+
+/*
+ * get a client UUID
+ */
+static int __init afs_get_client_UUID(void)
+{
+ struct timespec ts;
+ u64 uuidtime;
+ u16 clockseq;
+ int ret;
+
+ /* read the MAC address of one of the external interfaces and construct
+ * a UUID from it */
+ ret = afs_get_MAC_address(afs_uuid.node, sizeof(afs_uuid.node));
+ if (ret < 0)
+ return ret;
+
+ getnstimeofday(&ts);
+ uuidtime = (u64) ts.tv_sec * 1000 * 1000 * 10;
+ uuidtime += ts.tv_nsec / 100;
+ uuidtime += AFS_UUID_TO_UNIX_TIME;
+ afs_uuid.time_low = uuidtime;
+ afs_uuid.time_mid = uuidtime >> 32;
+ afs_uuid.time_hi_and_version = (uuidtime >> 48) & AFS_UUID_TIMEHI_MASK;
+ afs_uuid.time_hi_and_version = AFS_UUID_VERSION_TIME;
+
+ get_random_bytes(&clockseq, 2);
+ afs_uuid.clock_seq_low = clockseq;
+ afs_uuid.clock_seq_hi_and_reserved =
+ (clockseq >> 8) & AFS_UUID_CLOCKHI_MASK;
+ afs_uuid.clock_seq_hi_and_reserved = AFS_UUID_VARIANT_STD;
+
+ _debug("AFS UUID: %08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
+ afs_uuid.time_low,
+ afs_uuid.time_mid,
+ afs_uuid.time_hi_and_version,
+ afs_uuid.clock_seq_hi_and_reserved,
+ afs_uuid.clock_seq_low,
+ afs_uuid.node[0], afs_uuid.node[1], afs_uuid.node[2],
+ afs_uuid.node[3], afs_uuid.node[4], afs_uuid.node[5]);
+
+ return 0;
+}
+
/*
* initialise the AFS client FS module
*/
static int __init afs_init(void)
{
- int loop, ret;
+ int ret;
printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 registering.\n");
- /* initialise the callback hash table */
- spin_lock_init(&afs_cb_hash_lock);
- for (loop = AFS_CB_HASH_COUNT - 1; loop >= 0; loop--)
- INIT_LIST_HEAD(&afs_cb_hash_tbl[loop]);
+ ret = afs_get_client_UUID();
+ if (ret < 0)
+ return ret;
/* register the /proc stuff */
ret = afs_proc_init();
@@ -87,70 +108,56 @@ static int __init afs_init(void)
ret = cachefs_register_netfs(&afs_cache_netfs,
&afs_cache_cell_index_def);
if (ret < 0)
- goto error;
-#endif
-
-#ifdef CONFIG_KEYS_TURNED_OFF
- ret = afs_key_register();
- if (ret < 0)
goto error_cache;
#endif
/* initialise the cell DB */
ret = afs_cell_init(rootcell);
if (ret < 0)
- goto error_keys;
+ goto error_cell_init;
- /* start the timeout daemon */
- ret = afs_kafstimod_start();
+ /* initialise the VL update process */
+ ret = afs_vlocation_update_init();
if (ret < 0)
- goto error_keys;
+ goto error_vl_update_init;
- /* start the async operation daemon */
- ret = afs_kafsasyncd_start();
- if (ret < 0)
- goto error_kafstimod;
+ /* initialise the callback update process */
+ ret = afs_callback_update_init();
/* create the RxRPC transport */
- ret = rxrpc_create_transport(7001, &afs_transport);
+ ret = afs_open_socket();
if (ret < 0)
- goto error_kafsasyncd;
-
- afs_transport->peer_ops = &afs_peer_ops;
+ goto error_open_socket;
/* register the filesystems */
ret = afs_fs_init();
if (ret < 0)
- goto error_transport;
+ goto error_fs;
return ret;
- error_transport:
- rxrpc_put_transport(afs_transport);
- error_kafsasyncd:
- afs_kafsasyncd_stop();
- error_kafstimod:
- afs_kafstimod_stop();
- error_keys:
-#ifdef CONFIG_KEYS_TURNED_OFF
- afs_key_unregister();
- error_cache:
-#endif
+error_fs:
+ afs_close_socket();
+error_open_socket:
+error_vl_update_init:
+error_cell_init:
#ifdef AFS_CACHING_SUPPORT
cachefs_unregister_netfs(&afs_cache_netfs);
- error:
+error_cache:
#endif
+ afs_callback_update_kill();
+ afs_vlocation_purge();
afs_cell_purge();
afs_proc_cleanup();
printk(KERN_ERR "kAFS: failed to register: %d\n", ret);
return ret;
-} /* end afs_init() */
+}
/* XXX late_initcall is kludgy, but the only alternative seems to create
* a transport upon the first mount, which is worse. Or is it?
*/
late_initcall(afs_init); /* must be called after net/ to create socket */
-/*****************************************************************************/
+
/*
* clean up on module removal
*/
@@ -159,127 +166,16 @@ static void __exit afs_exit(void)
printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 unregistering.\n");
afs_fs_exit();
- rxrpc_put_transport(afs_transport);
- afs_kafstimod_stop();
- afs_kafsasyncd_stop();
+ afs_close_socket();
+ afs_purge_servers();
+ afs_callback_update_kill();
+ afs_vlocation_purge();
+ flush_scheduled_work();
afs_cell_purge();
-#ifdef CONFIG_KEYS_TURNED_OFF
- afs_key_unregister();
-#endif
#ifdef AFS_CACHING_SUPPORT
cachefs_unregister_netfs(&afs_cache_netfs);
#endif
afs_proc_cleanup();
-
-} /* end afs_exit() */
-
-module_exit(afs_exit);
-
-/*****************************************************************************/
-/*
- * notification that new peer record is being added
- * - called from krxsecd
- * - return an error to induce an abort
- * - mustn't sleep (caller holds an rwlock)
- */
-static int afs_adding_peer(struct rxrpc_peer *peer)
-{
- struct afs_server *server;
- int ret;
-
- _debug("kAFS: Adding new peer %08x\n", ntohl(peer->addr.s_addr));
-
- /* determine which server the peer resides in (if any) */
- ret = afs_server_find_by_peer(peer, &server);
- if (ret < 0)
- return ret; /* none that we recognise, so abort */
-
- _debug("Server %p{u=%d}\n", server, atomic_read(&server->usage));
-
- _debug("Cell %p{u=%d}\n",
- server->cell, atomic_read(&server->cell->usage));
-
- /* cross-point the structs under a global lock */
- spin_lock(&afs_server_peer_lock);
- peer->user = server;
- server->peer = peer;
- spin_unlock(&afs_server_peer_lock);
-
- afs_put_server(server);
-
- return 0;
-} /* end afs_adding_peer() */
-
-/*****************************************************************************/
-/*
- * notification that a peer record is being discarded
- * - called from krxiod or krxsecd
- */
-static void afs_discarding_peer(struct rxrpc_peer *peer)
-{
- struct afs_server *server;
-
- _enter("%p",peer);
-
- _debug("Discarding peer %08x (rtt=%lu.%lumS)\n",
- ntohl(peer->addr.s_addr),
- (long) (peer->rtt / 1000),
- (long) (peer->rtt % 1000));
-
- /* uncross-point the structs under a global lock */
- spin_lock(&afs_server_peer_lock);
- server = peer->user;
- if (server) {
- peer->user = NULL;
- server->peer = NULL;
- }
- spin_unlock(&afs_server_peer_lock);
-
- _leave("");
-
-} /* end afs_discarding_peer() */
-
-/*****************************************************************************/
-/*
- * clear the dead space between task_struct and kernel stack
- * - called by supplying -finstrument-functions to gcc
- */
-#if 0
-void __cyg_profile_func_enter (void *this_fn, void *call_site)
-__attribute__((no_instrument_function));
-
-void __cyg_profile_func_enter (void *this_fn, void *call_site)
-{
- asm volatile(" movl %%esp,%%edi \n"
- " andl %0,%%edi \n"
- " addl %1,%%edi \n"
- " movl %%esp,%%ecx \n"
- " subl %%edi,%%ecx \n"
- " shrl $2,%%ecx \n"
- " movl $0xedededed,%%eax \n"
- " rep stosl \n"
- :
- : "i"(~(THREAD_SIZE - 1)), "i"(sizeof(struct thread_info))
- : "eax", "ecx", "edi", "memory", "cc"
- );
}
-void __cyg_profile_func_exit(void *this_fn, void *call_site)
-__attribute__((no_instrument_function));
-
-void __cyg_profile_func_exit(void *this_fn, void *call_site)
-{
- asm volatile(" movl %%esp,%%edi \n"
- " andl %0,%%edi \n"
- " addl %1,%%edi \n"
- " movl %%esp,%%ecx \n"
- " subl %%edi,%%ecx \n"
- " shrl $2,%%ecx \n"
- " movl $0xdadadada,%%eax \n"
- " rep stosl \n"
- :
- : "i"(~(THREAD_SIZE - 1)), "i"(sizeof(struct thread_info))
- : "eax", "ecx", "edi", "memory", "cc"
- );
-}
-#endif
+module_exit(afs_exit);
diff --git a/fs/afs/misc.c b/fs/afs/misc.c
index e4fce66d76e..cdb9792d816 100644
--- a/fs/afs/misc.c
+++ b/fs/afs/misc.c
@@ -1,6 +1,6 @@
-/* misc.c: miscellaneous bits
+/* miscellaneous bits
*
- * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
+ * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
@@ -12,19 +12,20 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/errno.h>
-#include "errors.h"
#include "internal.h"
+#include "afs_fs.h"
-/*****************************************************************************/
/*
* convert an AFS abort code to a Linux error number
*/
-int afs_abort_to_error(int abortcode)
+int afs_abort_to_error(u32 abort_code)
{
- switch (abortcode) {
+ switch (abort_code) {
+ case 13: return -EACCES;
+ case 30: return -EROFS;
case VSALVAGE: return -EIO;
case VNOVNODE: return -ENOENT;
- case VNOVOL: return -ENXIO;
+ case VNOVOL: return -ENOMEDIUM;
case VVOLEXISTS: return -EEXIST;
case VNOSERVICE: return -EIO;
case VOFFLINE: return -ENOENT;
@@ -33,7 +34,24 @@ int afs_abort_to_error(int abortcode)
case VOVERQUOTA: return -EDQUOT;
case VBUSY: return -EBUSY;
case VMOVED: return -ENXIO;
- default: return -EIO;
+ case 0x2f6df0c: return -EACCES;
+ case 0x2f6df0f: return -EBUSY;
+ case 0x2f6df10: return -EEXIST;
+ case 0x2f6df11: return -EXDEV;
+ case 0x2f6df13: return -ENOTDIR;
+ case 0x2f6df14: return -EISDIR;
+ case 0x2f6df15: return -EINVAL;
+ case 0x2f6df1a: return -EFBIG;
+ case 0x2f6df1b: return -ENOSPC;
+ case 0x2f6df1d: return -EROFS;
+ case 0x2f6df1e: return -EMLINK;
+ case 0x2f6df20: return -EDOM;
+ case 0x2f6df21: return -ERANGE;
+ case 0x2f6df22: return -EDEADLK;
+ case 0x2f6df23: return -ENAMETOOLONG;
+ case 0x2f6df24: return -ENOLCK;
+ case 0x2f6df26: return -ENOTEMPTY;
+ case 0x2f6df78: return -EDQUOT;
+ default: return -EREMOTEIO;
}
-
-} /* end afs_abort_to_error() */
+}
diff --git a/fs/afs/mntpt.c b/fs/afs/mntpt.c
index 68495f0de7b..b905ae37f91 100644
--- a/fs/afs/mntpt.c
+++ b/fs/afs/mntpt.c
@@ -1,4 +1,4 @@
-/* mntpt.c: mountpoint management
+/* mountpoint management
*
* Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
@@ -18,10 +18,6 @@
#include <linux/mount.h>
#include <linux/namei.h>
#include <linux/mnt_namespace.h>
-#include "super.h"
-#include "cell.h"
-#include "volume.h"
-#include "vnode.h"
#include "internal.h"
@@ -30,6 +26,7 @@ static struct dentry *afs_mntpt_lookup(struct inode *dir,
struct nameidata *nd);
static int afs_mntpt_open(struct inode *inode, struct file *file);
static void *afs_mntpt_follow_link(struct dentry *dentry, struct nameidata *nd);
+static void afs_mntpt_expiry_timed_out(struct work_struct *work);
const struct file_operations afs_mntpt_file_operations = {
.open = afs_mntpt_open,
@@ -43,24 +40,19 @@ const struct inode_operations afs_mntpt_inode_operations = {
};
static LIST_HEAD(afs_vfsmounts);
+static DECLARE_DELAYED_WORK(afs_mntpt_expiry_timer, afs_mntpt_expiry_timed_out);
-static void afs_mntpt_expiry_timed_out(struct afs_timer *timer);
+unsigned long afs_mntpt_expiry_timeout = 10 * 60;
-struct afs_timer_ops afs_mntpt_expiry_timer_ops = {
- .timed_out = afs_mntpt_expiry_timed_out,
-};
-
-struct afs_timer afs_mntpt_expiry_timer;
-
-unsigned long afs_mntpt_expiry_timeout = 20;
-
-/*****************************************************************************/
/*
* check a symbolic link to see whether it actually encodes a mountpoint
* - sets the AFS_VNODE_MOUNTPOINT flag on the vnode appropriately
*/
-int afs_mntpt_check_symlink(struct afs_vnode *vnode)
+int afs_mntpt_check_symlink(struct afs_vnode *vnode, struct key *key)
{
+ struct file file = {
+ .private_data = key,
+ };
struct page *page;
size_t size;
char *buf;
@@ -69,7 +61,7 @@ int afs_mntpt_check_symlink(struct afs_vnode *vnode)
_enter("{%u,%u}", vnode->fid.vnode, vnode->fid.unique);
/* read the contents of the symlink into the pagecache */
- page = read_mapping_page(AFS_VNODE_TO_I(vnode)->i_mapping, 0, NULL);
+ page = read_mapping_page(AFS_VNODE_TO_I(vnode)->i_mapping, 0, &file);
if (IS_ERR(page)) {
ret = PTR_ERR(page);
goto out;
@@ -85,7 +77,7 @@ int afs_mntpt_check_symlink(struct afs_vnode *vnode)
/* examine the symlink's contents */
size = vnode->status.size;
- _debug("symlink to %*.*s", size, (int) size, buf);
+ _debug("symlink to %*.*s", (int) size, (int) size, buf);
if (size > 2 &&
(buf[0] == '%' || buf[0] == '#') &&
@@ -93,22 +85,20 @@ int afs_mntpt_check_symlink(struct afs_vnode *vnode)
) {
_debug("symlink is a mountpoint");
spin_lock(&vnode->lock);
- vnode->flags |= AFS_VNODE_MOUNTPOINT;
+ set_bit(AFS_VNODE_MOUNTPOINT, &vnode->flags);
spin_unlock(&vnode->lock);
}
ret = 0;
- out_free:
+out_free:
kunmap(page);
page_cache_release(page);
- out:
+out:
_leave(" = %d", ret);
return ret;
+}
-} /* end afs_mntpt_check_symlink() */
-
-/*****************************************************************************/
/*
* no valid lookup procedure on this sort of dir
*/
@@ -116,7 +106,7 @@ static struct dentry *afs_mntpt_lookup(struct inode *dir,
struct dentry *dentry,
struct nameidata *nd)
{
- kenter("%p,%p{%p{%s},%s}",
+ _enter("%p,%p{%p{%s},%s}",
dir,
dentry,
dentry->d_parent,
@@ -125,15 +115,14 @@ static struct dentry *afs_mntpt_lookup(struct inode *dir,
dentry->d_name.name);
return ERR_PTR(-EREMOTE);
-} /* end afs_mntpt_lookup() */
+}
-/*****************************************************************************/
/*
* no valid open procedure on this sort of dir
*/
static int afs_mntpt_open(struct inode *inode, struct file *file)
{
- kenter("%p,%p{%p{%s},%s}",
+ _enter("%p,%p{%p{%s},%s}",
inode, file,
file->f_path.dentry->d_parent,
file->f_path.dentry->d_parent ?
@@ -142,9 +131,8 @@ static int afs_mntpt_open(struct inode *inode, struct file *file)
file->f_path.dentry->d_name.name);
return -EREMOTE;
-} /* end afs_mntpt_open() */
+}
-/*****************************************************************************/
/*
* create a vfsmount to be automounted
*/
@@ -157,7 +145,7 @@ static struct vfsmount *afs_mntpt_do_automount(struct dentry *mntpt)
char *buf, *devname = NULL, *options = NULL;
int ret;
- kenter("{%s}", mntpt->d_name.name);
+ _enter("{%s}", mntpt->d_name.name);
BUG_ON(!mntpt->d_inode);
@@ -201,79 +189,108 @@ static struct vfsmount *afs_mntpt_do_automount(struct dentry *mntpt)
strcat(options, ",rwpath");
/* try and do the mount */
- kdebug("--- attempting mount %s -o %s ---", devname, options);
+ _debug("--- attempting mount %s -o %s ---", devname, options);
mnt = vfs_kern_mount(&afs_fs_type, 0, devname, options);
- kdebug("--- mount result %p ---", mnt);
+ _debug("--- mount result %p ---", mnt);
free_page((unsigned long) devname);
free_page((unsigned long) options);
- kleave(" = %p", mnt);
+ _leave(" = %p", mnt);
return mnt;
- error:
+error:
if (page)
page_cache_release(page);
if (devname)
free_page((unsigned long) devname);
if (options)
free_page((unsigned long) options);
- kleave(" = %d", ret);
+ _leave(" = %d", ret);
return ERR_PTR(ret);
-} /* end afs_mntpt_do_automount() */
+}
-/*****************************************************************************/
/*
* follow a link from a mountpoint directory, thus causing it to be mounted
*/
static void *afs_mntpt_follow_link(struct dentry *dentry, struct nameidata *nd)
{
struct vfsmount *newmnt;
- struct dentry *old_dentry;
int err;
- kenter("%p{%s},{%s:%p{%s}}",
+ _enter("%p{%s},{%s:%p{%s},}",
dentry,
dentry->d_name.name,
nd->mnt->mnt_devname,
dentry,
nd->dentry->d_name.name);
- newmnt = afs_mntpt_do_automount(dentry);
+ dput(nd->dentry);
+ nd->dentry = dget(dentry);
+
+ newmnt = afs_mntpt_do_automount(nd->dentry);
if (IS_ERR(newmnt)) {
path_release(nd);
return (void *)newmnt;
}
- old_dentry = nd->dentry;
- nd->dentry = dentry;
- err = do_add_mount(newmnt, nd, 0, &afs_vfsmounts);
- nd->dentry = old_dentry;
-
- path_release(nd);
-
- if (!err) {
- mntget(newmnt);
+ mntget(newmnt);
+ err = do_add_mount(newmnt, nd, MNT_SHRINKABLE, &afs_vfsmounts);
+ switch (err) {
+ case 0:
+ mntput(nd->mnt);
+ dput(nd->dentry);
nd->mnt = newmnt;
- dget(newmnt->mnt_root);
- nd->dentry = newmnt->mnt_root;
+ nd->dentry = dget(newmnt->mnt_root);
+ schedule_delayed_work(&afs_mntpt_expiry_timer,
+ afs_mntpt_expiry_timeout * HZ);
+ break;
+ case -EBUSY:
+ /* someone else made a mount here whilst we were busy */
+ while (d_mountpoint(nd->dentry) &&
+ follow_down(&nd->mnt, &nd->dentry))
+ ;
+ err = 0;
+ default:
+ mntput(newmnt);
+ break;
}
- kleave(" = %d", err);
+ _leave(" = %d", err);
return ERR_PTR(err);
-} /* end afs_mntpt_follow_link() */
+}
-/*****************************************************************************/
/*
* handle mountpoint expiry timer going off
*/
-static void afs_mntpt_expiry_timed_out(struct afs_timer *timer)
+static void afs_mntpt_expiry_timed_out(struct work_struct *work)
{
- kenter("");
+ _enter("");
- mark_mounts_for_expiry(&afs_vfsmounts);
+ if (!list_empty(&afs_vfsmounts)) {
+ mark_mounts_for_expiry(&afs_vfsmounts);
+ schedule_delayed_work(&afs_mntpt_expiry_timer,
+ afs_mntpt_expiry_timeout * HZ);
+ }
+
+ _leave("");
+}
- afs_kafstimod_add_timer(&afs_mntpt_expiry_timer,
- afs_mntpt_expiry_timeout * HZ);
+/*
+ * kill the AFS mountpoint timer if it's still running
+ */
+void afs_mntpt_kill_timer(void)
+{
+ _enter("");
- kleave("");
-} /* end afs_mntpt_expiry_timed_out() */
+ ASSERT(list_empty(&afs_vfsmounts));
+ cancel_delayed_work(&afs_mntpt_expiry_timer);
+ flush_scheduled_work();
+}
+
+/*
+ * begin unmount by attempting to remove all automounted mountpoints we added
+ */
+void afs_umount_begin(struct vfsmount *vfsmnt, int flags)
+{
+ shrink_submounts(vfsmnt, &afs_vfsmounts);
+}
diff --git a/fs/afs/mount.h b/fs/afs/mount.h
deleted file mode 100644
index 9d2f46ec549..00000000000
--- a/fs/afs/mount.h
+++ /dev/null
@@ -1,23 +0,0 @@
-/* mount.h: mount parameters
- *
- * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#ifndef _LINUX_AFS_MOUNT_H
-#define _LINUX_AFS_MOUNT_H
-
-struct afs_mountdata {
- const char *volume; /* name of volume */
- const char *cell; /* name of cell containing volume */
- const char *cache; /* name of cache block device */
- size_t nservers; /* number of server addresses listed */
- uint32_t servers[10]; /* IP addresses of servers in this cell */
-};
-
-#endif /* _LINUX_AFS_MOUNT_H */
diff --git a/fs/afs/netdevices.c b/fs/afs/netdevices.c
new file mode 100644
index 00000000000..fc27d4b52e5
--- /dev/null
+++ b/fs/afs/netdevices.c
@@ -0,0 +1,68 @@
+/* AFS network device helpers
+ *
+ * Copyright (c) 2007 Patrick McHardy <kaber@trash.net>
+ */
+
+#include <linux/string.h>
+#include <linux/rtnetlink.h>
+#include <linux/inetdevice.h>
+#include <linux/netdevice.h>
+#include <linux/if_arp.h>
+#include "internal.h"
+
+/*
+ * get a MAC address from a random ethernet interface that has a real one
+ * - the buffer will normally be 6 bytes in size
+ */
+int afs_get_MAC_address(u8 *mac, size_t maclen)
+{
+ struct net_device *dev;
+ int ret = -ENODEV;
+
+ if (maclen != ETH_ALEN)
+ BUG();
+
+ rtnl_lock();
+ dev = __dev_getfirstbyhwtype(ARPHRD_ETHER);
+ if (dev) {
+ memcpy(mac, dev->dev_addr, maclen);
+ ret = 0;
+ }
+ rtnl_unlock();
+ return ret;
+}
+
+/*
+ * get a list of this system's interface IPv4 addresses, netmasks and MTUs
+ * - maxbufs must be at least 1
+ * - returns the number of interface records in the buffer
+ */
+int afs_get_ipv4_interfaces(struct afs_interface *bufs, size_t maxbufs,
+ bool wantloopback)
+{
+ struct net_device *dev;
+ struct in_device *idev;
+ int n = 0;
+
+ ASSERT(maxbufs > 0);
+
+ rtnl_lock();
+ for_each_netdev(dev) {
+ if (dev->type == ARPHRD_LOOPBACK && !wantloopback)
+ continue;
+ idev = __in_dev_get_rtnl(dev);
+ if (!idev)
+ continue;
+ for_primary_ifa(idev) {
+ bufs[n].address.s_addr = ifa->ifa_address;
+ bufs[n].netmask.s_addr = ifa->ifa_mask;
+ bufs[n].mtu = dev->mtu;
+ n++;
+ if (n >= maxbufs)
+ goto out;
+ } endfor_ifa(idev);
+ }
+out:
+ rtnl_unlock();
+ return n;
+}
diff --git a/fs/afs/proc.c b/fs/afs/proc.c
index ae6b85b1e48..d5601f617cd 100644
--- a/fs/afs/proc.c
+++ b/fs/afs/proc.c
@@ -1,4 +1,4 @@
-/* proc.c: /proc interface for AFS
+/* /proc interface for AFS
*
* Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
@@ -13,8 +13,6 @@
#include <linux/module.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
-#include "cell.h"
-#include "volume.h"
#include <asm/uaccess.h>
#include "internal.h"
@@ -130,7 +128,6 @@ static const struct file_operations afs_proc_cell_servers_fops = {
.release = afs_proc_cell_servers_release,
};
-/*****************************************************************************/
/*
* initialise the /proc/fs/afs/ directory
*/
@@ -142,47 +139,43 @@ int afs_proc_init(void)
proc_afs = proc_mkdir("fs/afs", NULL);
if (!proc_afs)
- goto error;
+ goto error_dir;
proc_afs->owner = THIS_MODULE;
p = create_proc_entry("cells", 0, proc_afs);
if (!p)
- goto error_proc;
+ goto error_cells;
p->proc_fops = &afs_proc_cells_fops;
p->owner = THIS_MODULE;
p = create_proc_entry("rootcell", 0, proc_afs);
if (!p)
- goto error_cells;
+ goto error_rootcell;
p->proc_fops = &afs_proc_rootcell_fops;
p->owner = THIS_MODULE;
_leave(" = 0");
return 0;
- error_cells:
+error_rootcell:
remove_proc_entry("cells", proc_afs);
- error_proc:
+error_cells:
remove_proc_entry("fs/afs", NULL);
- error:
+error_dir:
_leave(" = -ENOMEM");
return -ENOMEM;
+}
-} /* end afs_proc_init() */
-
-/*****************************************************************************/
/*
* clean up the /proc/fs/afs/ directory
*/
void afs_proc_cleanup(void)
{
+ remove_proc_entry("rootcell", proc_afs);
remove_proc_entry("cells", proc_afs);
-
remove_proc_entry("fs/afs", NULL);
+}
-} /* end afs_proc_cleanup() */
-
-/*****************************************************************************/
/*
* open "/proc/fs/afs/cells" which provides a summary of extant cells
*/
@@ -199,9 +192,8 @@ static int afs_proc_cells_open(struct inode *inode, struct file *file)
m->private = PDE(inode)->data;
return 0;
-} /* end afs_proc_cells_open() */
+}
-/*****************************************************************************/
/*
* set up the iterator to start reading from the cells list and return the
* first item
@@ -225,9 +217,8 @@ static void *afs_proc_cells_start(struct seq_file *m, loff_t *_pos)
break;
return _p != &afs_proc_cells ? _p : NULL;
-} /* end afs_proc_cells_start() */
+}
-/*****************************************************************************/
/*
* move to next cell in cells list
*/
@@ -241,19 +232,16 @@ static void *afs_proc_cells_next(struct seq_file *p, void *v, loff_t *pos)
_p = v == (void *) 1 ? afs_proc_cells.next : _p->next;
return _p != &afs_proc_cells ? _p : NULL;
-} /* end afs_proc_cells_next() */
+}
-/*****************************************************************************/
/*
* clean up after reading from the cells list
*/
static void afs_proc_cells_stop(struct seq_file *p, void *v)
{
up_read(&afs_proc_cells_sem);
+}
-} /* end afs_proc_cells_stop() */
-
-/*****************************************************************************/
/*
* display a header line followed by a load of cell lines
*/
@@ -261,19 +249,18 @@ static int afs_proc_cells_show(struct seq_file *m, void *v)
{
struct afs_cell *cell = list_entry(v, struct afs_cell, proc_link);
- /* display header on line 1 */
if (v == (void *) 1) {
+ /* display header on line 1 */
seq_puts(m, "USE NAME\n");
return 0;
}
/* display one cell per line on subsequent lines */
- seq_printf(m, "%3d %s\n", atomic_read(&cell->usage), cell->name);
-
+ seq_printf(m, "%3d %s\n",
+ atomic_read(&cell->usage), cell->name);
return 0;
-} /* end afs_proc_cells_show() */
+}
-/*****************************************************************************/
/*
* handle writes to /proc/fs/afs/cells
* - to add cells: echo "add <cellname> <IP>[:<IP>][:<IP>]"
@@ -326,30 +313,32 @@ static ssize_t afs_proc_cells_write(struct file *file, const char __user *buf,
if (strcmp(kbuf, "add") == 0) {
struct afs_cell *cell;
- ret = afs_cell_create(name, args, &cell);
- if (ret < 0)
+
+ cell = afs_cell_create(name, args);
+ if (IS_ERR(cell)) {
+ ret = PTR_ERR(cell);
goto done;
+ }
+ afs_put_cell(cell);
printk("kAFS: Added new cell '%s'\n", name);
- }
- else {
+ } else {
goto inval;
}
ret = size;
- done:
+done:
kfree(kbuf);
_leave(" = %d", ret);
return ret;
- inval:
+inval:
ret = -EINVAL;
printk("kAFS: Invalid Command on /proc/fs/afs/cells file\n");
goto done;
-} /* end afs_proc_cells_write() */
+}
-/*****************************************************************************/
/*
* Stubs for /proc/fs/afs/rootcell
*/
@@ -369,7 +358,6 @@ static ssize_t afs_proc_rootcell_read(struct file *file, char __user *buf,
return 0;
}
-/*****************************************************************************/
/*
* handle writes to /proc/fs/afs/rootcell
* - to initialize rootcell: echo "cell.name:192.168.231.14"
@@ -407,14 +395,13 @@ static ssize_t afs_proc_rootcell_write(struct file *file,
if (ret >= 0)
ret = size; /* consume everything, always */
- infault:
+infault:
kfree(kbuf);
- nomem:
+nomem:
_leave(" = %d", ret);
return ret;
-} /* end afs_proc_rootcell_write() */
+}
-/*****************************************************************************/
/*
* initialise /proc/fs/afs/<cell>/
*/
@@ -426,25 +413,25 @@ int afs_proc_cell_setup(struct afs_cell *cell)
cell->proc_dir = proc_mkdir(cell->name, proc_afs);
if (!cell->proc_dir)
- return -ENOMEM;
+ goto error_dir;
p = create_proc_entry("servers", 0, cell->proc_dir);
if (!p)
- goto error_proc;
+ goto error_servers;
p->proc_fops = &afs_proc_cell_servers_fops;
p->owner = THIS_MODULE;
p->data = cell;
p = create_proc_entry("vlservers", 0, cell->proc_dir);
if (!p)
- goto error_servers;
+ goto error_vlservers;
p->proc_fops = &afs_proc_cell_vlservers_fops;
p->owner = THIS_MODULE;
p->data = cell;
p = create_proc_entry("volumes", 0, cell->proc_dir);
if (!p)
- goto error_vlservers;
+ goto error_volumes;
p->proc_fops = &afs_proc_cell_volumes_fops;
p->owner = THIS_MODULE;
p->data = cell;
@@ -452,17 +439,17 @@ int afs_proc_cell_setup(struct afs_cell *cell)
_leave(" = 0");
return 0;
- error_vlservers:
+error_volumes:
remove_proc_entry("vlservers", cell->proc_dir);
- error_servers:
+error_vlservers:
remove_proc_entry("servers", cell->proc_dir);
- error_proc:
+error_servers:
remove_proc_entry(cell->name, proc_afs);
+error_dir:
_leave(" = -ENOMEM");
return -ENOMEM;
-} /* end afs_proc_cell_setup() */
+}
-/*****************************************************************************/
/*
* remove /proc/fs/afs/<cell>/
*/
@@ -476,9 +463,8 @@ void afs_proc_cell_remove(struct afs_cell *cell)
remove_proc_entry(cell->name, proc_afs);
_leave("");
-} /* end afs_proc_cell_remove() */
+}
-/*****************************************************************************/
/*
* open "/proc/fs/afs/<cell>/volumes" which provides a summary of extant cells
*/
@@ -488,7 +474,7 @@ static int afs_proc_cell_volumes_open(struct inode *inode, struct file *file)
struct seq_file *m;
int ret;
- cell = afs_get_cell_maybe((struct afs_cell **) &PDE(inode)->data);
+ cell = PDE(inode)->data;
if (!cell)
return -ENOENT;
@@ -500,25 +486,16 @@ static int afs_proc_cell_volumes_open(struct inode *inode, struct file *file)
m->private = cell;
return 0;
-} /* end afs_proc_cell_volumes_open() */
+}
-/*****************************************************************************/
/*
* close the file and release the ref to the cell
*/
static int afs_proc_cell_volumes_release(struct inode *inode, struct file *file)
{
- struct afs_cell *cell = PDE(inode)->data;
- int ret;
-
- ret = seq_release(inode,file);
-
- afs_put_cell(cell);
-
- return ret;
-} /* end afs_proc_cell_volumes_release() */
+ return seq_release(inode, file);
+}
-/*****************************************************************************/
/*
* set up the iterator to start reading from the cells list and return the
* first item
@@ -545,9 +522,8 @@ static void *afs_proc_cell_volumes_start(struct seq_file *m, loff_t *_pos)
break;
return _p != &cell->vl_list ? _p : NULL;
-} /* end afs_proc_cell_volumes_start() */
+}
-/*****************************************************************************/
/*
* move to next cell in cells list
*/
@@ -562,12 +538,11 @@ static void *afs_proc_cell_volumes_next(struct seq_file *p, void *v,
(*_pos)++;
_p = v;
- _p = v == (void *) 1 ? cell->vl_list.next : _p->next;
+ _p = (v == (void *) 1) ? cell->vl_list.next : _p->next;
- return _p != &cell->vl_list ? _p : NULL;
-} /* end afs_proc_cell_volumes_next() */
+ return (_p != &cell->vl_list) ? _p : NULL;
+}
-/*****************************************************************************/
/*
* clean up after reading from the cells list
*/
@@ -576,10 +551,18 @@ static void afs_proc_cell_volumes_stop(struct seq_file *p, void *v)
struct afs_cell *cell = p->private;
up_read(&cell->vl_sem);
+}
-} /* end afs_proc_cell_volumes_stop() */
+const char afs_vlocation_states[][4] = {
+ [AFS_VL_NEW] = "New",
+ [AFS_VL_CREATING] = "Crt",
+ [AFS_VL_VALID] = "Val",
+ [AFS_VL_NO_VOLUME] = "NoV",
+ [AFS_VL_UPDATING] = "Upd",
+ [AFS_VL_VOLUME_DELETED] = "Del",
+ [AFS_VL_UNCERTAIN] = "Unc",
+};
-/*****************************************************************************/
/*
* display a header line followed by a load of volume lines
*/
@@ -590,23 +573,22 @@ static int afs_proc_cell_volumes_show(struct seq_file *m, void *v)
/* display header on line 1 */
if (v == (void *) 1) {
- seq_puts(m, "USE VLID[0] VLID[1] VLID[2] NAME\n");
+ seq_puts(m, "USE STT VLID[0] VLID[1] VLID[2] NAME\n");
return 0;
}
/* display one cell per line on subsequent lines */
- seq_printf(m, "%3d %08x %08x %08x %s\n",
+ seq_printf(m, "%3d %s %08x %08x %08x %s\n",
atomic_read(&vlocation->usage),
+ afs_vlocation_states[vlocation->state],
vlocation->vldb.vid[0],
vlocation->vldb.vid[1],
vlocation->vldb.vid[2],
- vlocation->vldb.name
- );
+ vlocation->vldb.name);
return 0;
-} /* end afs_proc_cell_volumes_show() */
+}
-/*****************************************************************************/
/*
* open "/proc/fs/afs/<cell>/vlservers" which provides a list of volume
* location server
@@ -617,11 +599,11 @@ static int afs_proc_cell_vlservers_open(struct inode *inode, struct file *file)
struct seq_file *m;
int ret;
- cell = afs_get_cell_maybe((struct afs_cell**)&PDE(inode)->data);
+ cell = PDE(inode)->data;
if (!cell)
return -ENOENT;
- ret = seq_open(file,&afs_proc_cell_vlservers_ops);
+ ret = seq_open(file, &afs_proc_cell_vlservers_ops);
if (ret<0)
return ret;
@@ -629,26 +611,17 @@ static int afs_proc_cell_vlservers_open(struct inode *inode, struct file *file)
m->private = cell;
return 0;
-} /* end afs_proc_cell_vlservers_open() */
+}
-/*****************************************************************************/
/*
* close the file and release the ref to the cell
*/
static int afs_proc_cell_vlservers_release(struct inode *inode,
struct file *file)
{
- struct afs_cell *cell = PDE(inode)->data;
- int ret;
-
- ret = seq_release(inode,file);
-
- afs_put_cell(cell);
-
- return ret;
-} /* end afs_proc_cell_vlservers_release() */
+ return seq_release(inode, file);
+}
-/*****************************************************************************/
/*
* set up the iterator to start reading from the cells list and return the
* first item
@@ -672,9 +645,8 @@ static void *afs_proc_cell_vlservers_start(struct seq_file *m, loff_t *_pos)
return NULL;
return &cell->vl_addrs[pos];
-} /* end afs_proc_cell_vlservers_start() */
+}
-/*****************************************************************************/
/*
* move to next cell in cells list
*/
@@ -692,9 +664,8 @@ static void *afs_proc_cell_vlservers_next(struct seq_file *p, void *v,
return NULL;
return &cell->vl_addrs[pos];
-} /* end afs_proc_cell_vlservers_next() */
+}
-/*****************************************************************************/
/*
* clean up after reading from the cells list
*/
@@ -703,10 +674,8 @@ static void afs_proc_cell_vlservers_stop(struct seq_file *p, void *v)
struct afs_cell *cell = p->private;
up_read(&cell->vl_sem);
+}
-} /* end afs_proc_cell_vlservers_stop() */
-
-/*****************************************************************************/
/*
* display a header line followed by a load of volume lines
*/
@@ -722,11 +691,9 @@ static int afs_proc_cell_vlservers_show(struct seq_file *m, void *v)
/* display one cell per line on subsequent lines */
seq_printf(m, "%u.%u.%u.%u\n", NIPQUAD(addr->s_addr));
-
return 0;
-} /* end afs_proc_cell_vlservers_show() */
+}
-/*****************************************************************************/
/*
* open "/proc/fs/afs/<cell>/servers" which provides a summary of active
* servers
@@ -737,7 +704,7 @@ static int afs_proc_cell_servers_open(struct inode *inode, struct file *file)
struct seq_file *m;
int ret;
- cell = afs_get_cell_maybe((struct afs_cell **) &PDE(inode)->data);
+ cell = PDE(inode)->data;
if (!cell)
return -ENOENT;
@@ -747,34 +714,24 @@ static int afs_proc_cell_servers_open(struct inode *inode, struct file *file)
m = file->private_data;
m->private = cell;
-
return 0;
-} /* end afs_proc_cell_servers_open() */
+}
-/*****************************************************************************/
/*
* close the file and release the ref to the cell
*/
static int afs_proc_cell_servers_release(struct inode *inode,
struct file *file)
{
- struct afs_cell *cell = PDE(inode)->data;
- int ret;
-
- ret = seq_release(inode, file);
-
- afs_put_cell(cell);
-
- return ret;
-} /* end afs_proc_cell_servers_release() */
+ return seq_release(inode, file);
+}
-/*****************************************************************************/
/*
* set up the iterator to start reading from the cells list and return the
* first item
*/
static void *afs_proc_cell_servers_start(struct seq_file *m, loff_t *_pos)
- __acquires(m->private->sv_lock)
+ __acquires(m->private->servers_lock)
{
struct list_head *_p;
struct afs_cell *cell = m->private;
@@ -783,7 +740,7 @@ static void *afs_proc_cell_servers_start(struct seq_file *m, loff_t *_pos)
_enter("cell=%p pos=%Ld", cell, *_pos);
/* lock the list against modification */
- read_lock(&cell->sv_lock);
+ read_lock(&cell->servers_lock);
/* allow for the header line */
if (!pos)
@@ -791,14 +748,13 @@ static void *afs_proc_cell_servers_start(struct seq_file *m, loff_t *_pos)
pos--;
/* find the n'th element in the list */
- list_for_each(_p, &cell->sv_list)
+ list_for_each(_p, &cell->servers)
if (!pos--)
break;
- return _p != &cell->sv_list ? _p : NULL;
-} /* end afs_proc_cell_servers_start() */
+ return _p != &cell->servers ? _p : NULL;
+}
-/*****************************************************************************/
/*
* move to next cell in cells list
*/
@@ -813,25 +769,22 @@ static void *afs_proc_cell_servers_next(struct seq_file *p, void *v,
(*_pos)++;
_p = v;
- _p = v == (void *) 1 ? cell->sv_list.next : _p->next;
+ _p = v == (void *) 1 ? cell->servers.next : _p->next;
- return _p != &cell->sv_list ? _p : NULL;
-} /* end afs_proc_cell_servers_next() */
+ return _p != &cell->servers ? _p : NULL;
+}
-/*****************************************************************************/
/*
* clean up after reading from the cells list
*/
static void afs_proc_cell_servers_stop(struct seq_file *p, void *v)
- __releases(p->private->sv_lock)
+ __releases(p->private->servers_lock)
{
struct afs_cell *cell = p->private;
- read_unlock(&cell->sv_lock);
-
-} /* end afs_proc_cell_servers_stop() */
+ read_unlock(&cell->servers_lock);
+}
-/*****************************************************************************/
/*
* display a header line followed by a load of volume lines
*/
@@ -849,10 +802,7 @@ static int afs_proc_cell_servers_show(struct seq_file *m, void *v)
/* display one cell per line on subsequent lines */
sprintf(ipaddr, "%u.%u.%u.%u", NIPQUAD(server->addr));
seq_printf(m, "%3d %-15.15s %5d\n",
- atomic_read(&server->usage),
- ipaddr,
- server->fs_state
- );
+ atomic_read(&server->usage), ipaddr, server->fs_state);
return 0;
-} /* end afs_proc_cell_servers_show() */
+}
diff --git a/fs/afs/rxrpc.c b/fs/afs/rxrpc.c
new file mode 100644
index 00000000000..222c1a3abbb
--- /dev/null
+++ b/fs/afs/rxrpc.c
@@ -0,0 +1,782 @@
+/* Maintain an RxRPC server socket to do AFS communications through
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <net/sock.h>
+#include <net/af_rxrpc.h>
+#include <rxrpc/packet.h>
+#include "internal.h"
+#include "afs_cm.h"
+
+static struct socket *afs_socket; /* my RxRPC socket */
+static struct workqueue_struct *afs_async_calls;
+static atomic_t afs_outstanding_calls;
+static atomic_t afs_outstanding_skbs;
+
+static void afs_wake_up_call_waiter(struct afs_call *);
+static int afs_wait_for_call_to_complete(struct afs_call *);
+static void afs_wake_up_async_call(struct afs_call *);
+static int afs_dont_wait_for_call_to_complete(struct afs_call *);
+static void afs_process_async_call(struct work_struct *);
+static void afs_rx_interceptor(struct sock *, unsigned long, struct sk_buff *);
+static int afs_deliver_cm_op_id(struct afs_call *, struct sk_buff *, bool);
+
+/* synchronous call management */
+const struct afs_wait_mode afs_sync_call = {
+ .rx_wakeup = afs_wake_up_call_waiter,
+ .wait = afs_wait_for_call_to_complete,
+};
+
+/* asynchronous call management */
+const struct afs_wait_mode afs_async_call = {
+ .rx_wakeup = afs_wake_up_async_call,
+ .wait = afs_dont_wait_for_call_to_complete,
+};
+
+/* asynchronous incoming call management */
+static const struct afs_wait_mode afs_async_incoming_call = {
+ .rx_wakeup = afs_wake_up_async_call,
+};
+
+/* asynchronous incoming call initial processing */
+static const struct afs_call_type afs_RXCMxxxx = {
+ .name = "CB.xxxx",
+ .deliver = afs_deliver_cm_op_id,
+ .abort_to_error = afs_abort_to_error,
+};
+
+static void afs_collect_incoming_call(struct work_struct *);
+
+static struct sk_buff_head afs_incoming_calls;
+static DECLARE_WORK(afs_collect_incoming_call_work, afs_collect_incoming_call);
+
+/*
+ * open an RxRPC socket and bind it to be a server for callback notifications
+ * - the socket is left in blocking mode and non-blocking ops use MSG_DONTWAIT
+ */
+int afs_open_socket(void)
+{
+ struct sockaddr_rxrpc srx;
+ struct socket *socket;
+ int ret;
+
+ _enter("");
+
+ skb_queue_head_init(&afs_incoming_calls);
+
+ afs_async_calls = create_singlethread_workqueue("kafsd");
+ if (!afs_async_calls) {
+ _leave(" = -ENOMEM [wq]");
+ return -ENOMEM;
+ }
+
+ ret = sock_create_kern(AF_RXRPC, SOCK_DGRAM, PF_INET, &socket);
+ if (ret < 0) {
+ destroy_workqueue(afs_async_calls);
+ _leave(" = %d [socket]", ret);
+ return ret;
+ }
+
+ socket->sk->sk_allocation = GFP_NOFS;
+
+ /* bind the callback manager's address to make this a server socket */
+ srx.srx_family = AF_RXRPC;
+ srx.srx_service = CM_SERVICE;
+ srx.transport_type = SOCK_DGRAM;
+ srx.transport_len = sizeof(srx.transport.sin);
+ srx.transport.sin.sin_family = AF_INET;
+ srx.transport.sin.sin_port = htons(AFS_CM_PORT);
+ memset(&srx.transport.sin.sin_addr, 0,
+ sizeof(srx.transport.sin.sin_addr));
+
+ ret = kernel_bind(socket, (struct sockaddr *) &srx, sizeof(srx));
+ if (ret < 0) {
+ sock_release(socket);
+ _leave(" = %d [bind]", ret);
+ return ret;
+ }
+
+ rxrpc_kernel_intercept_rx_messages(socket, afs_rx_interceptor);
+
+ afs_socket = socket;
+ _leave(" = 0");
+ return 0;
+}
+
+/*
+ * close the RxRPC socket AFS was using
+ */
+void afs_close_socket(void)
+{
+ _enter("");
+
+ sock_release(afs_socket);
+
+ _debug("dework");
+ destroy_workqueue(afs_async_calls);
+
+ ASSERTCMP(atomic_read(&afs_outstanding_skbs), ==, 0);
+ ASSERTCMP(atomic_read(&afs_outstanding_calls), ==, 0);
+ _leave("");
+}
+
+/*
+ * note that the data in a socket buffer is now delivered and that the buffer
+ * should be freed
+ */
+static void afs_data_delivered(struct sk_buff *skb)
+{
+ if (!skb) {
+ _debug("DLVR NULL [%d]", atomic_read(&afs_outstanding_skbs));
+ dump_stack();
+ } else {
+ _debug("DLVR %p{%u} [%d]",
+ skb, skb->mark, atomic_read(&afs_outstanding_skbs));
+ if (atomic_dec_return(&afs_outstanding_skbs) == -1)
+ BUG();
+ rxrpc_kernel_data_delivered(skb);
+ }
+}
+
+/*
+ * free a socket buffer
+ */
+static void afs_free_skb(struct sk_buff *skb)
+{
+ if (!skb) {
+ _debug("FREE NULL [%d]", atomic_read(&afs_outstanding_skbs));
+ dump_stack();
+ } else {
+ _debug("FREE %p{%u} [%d]",
+ skb, skb->mark, atomic_read(&afs_outstanding_skbs));
+ if (atomic_dec_return(&afs_outstanding_skbs) == -1)
+ BUG();
+ rxrpc_kernel_free_skb(skb);
+ }
+}
+
+/*
+ * free a call
+ */
+static void afs_free_call(struct afs_call *call)
+{
+ _debug("DONE %p{%s} [%d]",
+ call, call->type->name, atomic_read(&afs_outstanding_calls));
+ if (atomic_dec_return(&afs_outstanding_calls) == -1)
+ BUG();
+
+ ASSERTCMP(call->rxcall, ==, NULL);
+ ASSERT(!work_pending(&call->async_work));
+ ASSERT(skb_queue_empty(&call->rx_queue));
+ ASSERT(call->type->name != NULL);
+
+ kfree(call->request);
+ kfree(call);
+}
+
+/*
+ * allocate a call with flat request and reply buffers
+ */
+struct afs_call *afs_alloc_flat_call(const struct afs_call_type *type,
+ size_t request_size, size_t reply_size)
+{
+ struct afs_call *call;
+
+ call = kzalloc(sizeof(*call), GFP_NOFS);
+ if (!call)
+ goto nomem_call;
+
+ _debug("CALL %p{%s} [%d]",
+ call, type->name, atomic_read(&afs_outstanding_calls));
+ atomic_inc(&afs_outstanding_calls);
+
+ call->type = type;
+ call->request_size = request_size;
+ call->reply_max = reply_size;
+
+ if (request_size) {
+ call->request = kmalloc(request_size, GFP_NOFS);
+ if (!call->request)
+ goto nomem_free;
+ }
+
+ if (reply_size) {
+ call->buffer = kmalloc(reply_size, GFP_NOFS);
+ if (!call->buffer)
+ goto nomem_free;
+ }
+
+ init_waitqueue_head(&call->waitq);
+ skb_queue_head_init(&call->rx_queue);
+ return call;
+
+nomem_free:
+ afs_free_call(call);
+nomem_call:
+ return NULL;
+}
+
+/*
+ * clean up a call with flat buffer
+ */
+void afs_flat_call_destructor(struct afs_call *call)
+{
+ _enter("");
+
+ kfree(call->request);
+ call->request = NULL;
+ kfree(call->buffer);
+ call->buffer = NULL;
+}
+
+/*
+ * initiate a call
+ */
+int afs_make_call(struct in_addr *addr, struct afs_call *call, gfp_t gfp,
+ const struct afs_wait_mode *wait_mode)
+{
+ struct sockaddr_rxrpc srx;
+ struct rxrpc_call *rxcall;
+ struct msghdr msg;
+ struct kvec iov[1];
+ int ret;
+
+ _enter("%x,{%d},", addr->s_addr, ntohs(call->port));
+
+ ASSERT(call->type != NULL);
+ ASSERT(call->type->name != NULL);
+
+ _debug("MAKE %p{%s} [%d]",
+ call, call->type->name, atomic_read(&afs_outstanding_calls));
+
+ call->wait_mode = wait_mode;
+ INIT_WORK(&call->async_work, afs_process_async_call);
+
+ memset(&srx, 0, sizeof(srx));
+ srx.srx_family = AF_RXRPC;
+ srx.srx_service = call->service_id;
+ srx.transport_type = SOCK_DGRAM;
+ srx.transport_len = sizeof(srx.transport.sin);
+ srx.transport.sin.sin_family = AF_INET;
+ srx.transport.sin.sin_port = call->port;
+ memcpy(&srx.transport.sin.sin_addr, addr, 4);
+
+ /* create a call */
+ rxcall = rxrpc_kernel_begin_call(afs_socket, &srx, call->key,
+ (unsigned long) call, gfp);
+ call->key = NULL;
+ if (IS_ERR(rxcall)) {
+ ret = PTR_ERR(rxcall);
+ goto error_kill_call;
+ }
+
+ call->rxcall = rxcall;
+
+ /* send the request */
+ iov[0].iov_base = call->request;
+ iov[0].iov_len = call->request_size;
+
+ msg.msg_name = NULL;
+ msg.msg_namelen = 0;
+ msg.msg_iov = (struct iovec *) iov;
+ msg.msg_iovlen = 1;
+ msg.msg_control = NULL;
+ msg.msg_controllen = 0;
+ msg.msg_flags = 0;
+
+ /* have to change the state *before* sending the last packet as RxRPC
+ * might give us the reply before it returns from sending the
+ * request */
+ call->state = AFS_CALL_AWAIT_REPLY;
+ ret = rxrpc_kernel_send_data(rxcall, &msg, call->request_size);
+ if (ret < 0)
+ goto error_do_abort;
+
+ /* at this point, an async call may no longer exist as it may have
+ * already completed */
+ return wait_mode->wait(call);
+
+error_do_abort:
+ rxrpc_kernel_abort_call(rxcall, RX_USER_ABORT);
+ rxrpc_kernel_end_call(rxcall);
+ call->rxcall = NULL;
+error_kill_call:
+ call->type->destructor(call);
+ afs_free_call(call);
+ _leave(" = %d", ret);
+ return ret;
+}
+
+/*
+ * handles intercepted messages that were arriving in the socket's Rx queue
+ * - called with the socket receive queue lock held to ensure message ordering
+ * - called with softirqs disabled
+ */
+static void afs_rx_interceptor(struct sock *sk, unsigned long user_call_ID,
+ struct sk_buff *skb)
+{
+ struct afs_call *call = (struct afs_call *) user_call_ID;
+
+ _enter("%p,,%u", call, skb->mark);
+
+ _debug("ICPT %p{%u} [%d]",
+ skb, skb->mark, atomic_read(&afs_outstanding_skbs));
+
+ ASSERTCMP(sk, ==, afs_socket->sk);
+ atomic_inc(&afs_outstanding_skbs);
+
+ if (!call) {
+ /* its an incoming call for our callback service */
+ skb_queue_tail(&afs_incoming_calls, skb);
+ schedule_work(&afs_collect_incoming_call_work);
+ } else {
+ /* route the messages directly to the appropriate call */
+ skb_queue_tail(&call->rx_queue, skb);
+ call->wait_mode->rx_wakeup(call);
+ }
+
+ _leave("");
+}
+
+/*
+ * deliver messages to a call
+ */
+static void afs_deliver_to_call(struct afs_call *call)
+{
+ struct sk_buff *skb;
+ bool last;
+ u32 abort_code;
+ int ret;
+
+ _enter("");
+
+ while ((call->state == AFS_CALL_AWAIT_REPLY ||
+ call->state == AFS_CALL_AWAIT_OP_ID ||
+ call->state == AFS_CALL_AWAIT_REQUEST ||
+ call->state == AFS_CALL_AWAIT_ACK) &&
+ (skb = skb_dequeue(&call->rx_queue))) {
+ switch (skb->mark) {
+ case RXRPC_SKB_MARK_DATA:
+ _debug("Rcv DATA");
+ last = rxrpc_kernel_is_data_last(skb);
+ ret = call->type->deliver(call, skb, last);
+ switch (ret) {
+ case 0:
+ if (last &&
+ call->state == AFS_CALL_AWAIT_REPLY)
+ call->state = AFS_CALL_COMPLETE;
+ break;
+ case -ENOTCONN:
+ abort_code = RX_CALL_DEAD;
+ goto do_abort;
+ case -ENOTSUPP:
+ abort_code = RX_INVALID_OPERATION;
+ goto do_abort;
+ default:
+ abort_code = RXGEN_CC_UNMARSHAL;
+ if (call->state != AFS_CALL_AWAIT_REPLY)
+ abort_code = RXGEN_SS_UNMARSHAL;
+ do_abort:
+ rxrpc_kernel_abort_call(call->rxcall,
+ abort_code);
+ call->error = ret;
+ call->state = AFS_CALL_ERROR;
+ break;
+ }
+ afs_data_delivered(skb);
+ skb = NULL;
+ continue;
+ case RXRPC_SKB_MARK_FINAL_ACK:
+ _debug("Rcv ACK");
+ call->state = AFS_CALL_COMPLETE;
+ break;
+ case RXRPC_SKB_MARK_BUSY:
+ _debug("Rcv BUSY");
+ call->error = -EBUSY;
+ call->state = AFS_CALL_BUSY;
+ break;
+ case RXRPC_SKB_MARK_REMOTE_ABORT:
+ abort_code = rxrpc_kernel_get_abort_code(skb);
+ call->error = call->type->abort_to_error(abort_code);
+ call->state = AFS_CALL_ABORTED;
+ _debug("Rcv ABORT %u -> %d", abort_code, call->error);
+ break;
+ case RXRPC_SKB_MARK_NET_ERROR:
+ call->error = -rxrpc_kernel_get_error_number(skb);
+ call->state = AFS_CALL_ERROR;
+ _debug("Rcv NET ERROR %d", call->error);
+ break;
+ case RXRPC_SKB_MARK_LOCAL_ERROR:
+ call->error = -rxrpc_kernel_get_error_number(skb);
+ call->state = AFS_CALL_ERROR;
+ _debug("Rcv LOCAL ERROR %d", call->error);
+ break;
+ default:
+ BUG();
+ break;
+ }
+
+ afs_free_skb(skb);
+ }
+
+ /* make sure the queue is empty if the call is done with (we might have
+ * aborted the call early because of an unmarshalling error) */
+ if (call->state >= AFS_CALL_COMPLETE) {
+ while ((skb = skb_dequeue(&call->rx_queue)))
+ afs_free_skb(skb);
+ if (call->incoming) {
+ rxrpc_kernel_end_call(call->rxcall);
+ call->rxcall = NULL;
+ call->type->destructor(call);
+ afs_free_call(call);
+ }
+ }
+
+ _leave("");
+}
+
+/*
+ * wait synchronously for a call to complete
+ */
+static int afs_wait_for_call_to_complete(struct afs_call *call)
+{
+ struct sk_buff *skb;
+ int ret;
+
+ DECLARE_WAITQUEUE(myself, current);
+
+ _enter("");
+
+ add_wait_queue(&call->waitq, &myself);
+ for (;;) {
+ set_current_state(TASK_INTERRUPTIBLE);
+
+ /* deliver any messages that are in the queue */
+ if (!skb_queue_empty(&call->rx_queue)) {
+ __set_current_state(TASK_RUNNING);
+ afs_deliver_to_call(call);
+ continue;
+ }
+
+ ret = call->error;
+ if (call->state >= AFS_CALL_COMPLETE)
+ break;
+ ret = -EINTR;
+ if (signal_pending(current))
+ break;
+ schedule();
+ }
+
+ remove_wait_queue(&call->waitq, &myself);
+ __set_current_state(TASK_RUNNING);
+
+ /* kill the call */
+ if (call->state < AFS_CALL_COMPLETE) {
+ _debug("call incomplete");
+ rxrpc_kernel_abort_call(call->rxcall, RX_CALL_DEAD);
+ while ((skb = skb_dequeue(&call->rx_queue)))
+ afs_free_skb(skb);
+ }
+
+ _debug("call complete");
+ rxrpc_kernel_end_call(call->rxcall);
+ call->rxcall = NULL;
+ call->type->destructor(call);
+ afs_free_call(call);
+ _leave(" = %d", ret);
+ return ret;
+}
+
+/*
+ * wake up a waiting call
+ */
+static void afs_wake_up_call_waiter(struct afs_call *call)
+{
+ wake_up(&call->waitq);
+}
+
+/*
+ * wake up an asynchronous call
+ */
+static void afs_wake_up_async_call(struct afs_call *call)
+{
+ _enter("");
+ queue_work(afs_async_calls, &call->async_work);
+}
+
+/*
+ * put a call into asynchronous mode
+ * - mustn't touch the call descriptor as the call my have completed by the
+ * time we get here
+ */
+static int afs_dont_wait_for_call_to_complete(struct afs_call *call)
+{
+ _enter("");
+ return -EINPROGRESS;
+}
+
+/*
+ * delete an asynchronous call
+ */
+static void afs_delete_async_call(struct work_struct *work)
+{
+ struct afs_call *call =
+ container_of(work, struct afs_call, async_work);
+
+ _enter("");
+
+ afs_free_call(call);
+
+ _leave("");
+}
+
+/*
+ * perform processing on an asynchronous call
+ * - on a multiple-thread workqueue this work item may try to run on several
+ * CPUs at the same time
+ */
+static void afs_process_async_call(struct work_struct *work)
+{
+ struct afs_call *call =
+ container_of(work, struct afs_call, async_work);
+
+ _enter("");
+
+ if (!skb_queue_empty(&call->rx_queue))
+ afs_deliver_to_call(call);
+
+ if (call->state >= AFS_CALL_COMPLETE && call->wait_mode) {
+ if (call->wait_mode->async_complete)
+ call->wait_mode->async_complete(call->reply,
+ call->error);
+ call->reply = NULL;
+
+ /* kill the call */
+ rxrpc_kernel_end_call(call->rxcall);
+ call->rxcall = NULL;
+ if (call->type->destructor)
+ call->type->destructor(call);
+
+ /* we can't just delete the call because the work item may be
+ * queued */
+ PREPARE_WORK(&call->async_work, afs_delete_async_call);
+ queue_work(afs_async_calls, &call->async_work);
+ }
+
+ _leave("");
+}
+
+/*
+ * empty a socket buffer into a flat reply buffer
+ */
+void afs_transfer_reply(struct afs_call *call, struct sk_buff *skb)
+{
+ size_t len = skb->len;
+
+ if (skb_copy_bits(skb, 0, call->buffer + call->reply_size, len) < 0)
+ BUG();
+ call->reply_size += len;
+}
+
+/*
+ * accept the backlog of incoming calls
+ */
+static void afs_collect_incoming_call(struct work_struct *work)
+{
+ struct rxrpc_call *rxcall;
+ struct afs_call *call = NULL;
+ struct sk_buff *skb;
+
+ while ((skb = skb_dequeue(&afs_incoming_calls))) {
+ _debug("new call");
+
+ /* don't need the notification */
+ afs_free_skb(skb);
+
+ if (!call) {
+ call = kzalloc(sizeof(struct afs_call), GFP_KERNEL);
+ if (!call) {
+ rxrpc_kernel_reject_call(afs_socket);
+ return;
+ }
+
+ INIT_WORK(&call->async_work, afs_process_async_call);
+ call->wait_mode = &afs_async_incoming_call;
+ call->type = &afs_RXCMxxxx;
+ init_waitqueue_head(&call->waitq);
+ skb_queue_head_init(&call->rx_queue);
+ call->state = AFS_CALL_AWAIT_OP_ID;
+
+ _debug("CALL %p{%s} [%d]",
+ call, call->type->name,
+ atomic_read(&afs_outstanding_calls));
+ atomic_inc(&afs_outstanding_calls);
+ }
+
+ rxcall = rxrpc_kernel_accept_call(afs_socket,
+ (unsigned long) call);
+ if (!IS_ERR(rxcall)) {
+ call->rxcall = rxcall;
+ call = NULL;
+ }
+ }
+
+ if (call)
+ afs_free_call(call);
+}
+
+/*
+ * grab the operation ID from an incoming cache manager call
+ */
+static int afs_deliver_cm_op_id(struct afs_call *call, struct sk_buff *skb,
+ bool last)
+{
+ size_t len = skb->len;
+ void *oibuf = (void *) &call->operation_ID;
+
+ _enter("{%u},{%zu},%d", call->offset, len, last);
+
+ ASSERTCMP(call->offset, <, 4);
+
+ /* the operation ID forms the first four bytes of the request data */
+ len = min_t(size_t, len, 4 - call->offset);
+ if (skb_copy_bits(skb, 0, oibuf + call->offset, len) < 0)
+ BUG();
+ if (!pskb_pull(skb, len))
+ BUG();
+ call->offset += len;
+
+ if (call->offset < 4) {
+ if (last) {
+ _leave(" = -EBADMSG [op ID short]");
+ return -EBADMSG;
+ }
+ _leave(" = 0 [incomplete]");
+ return 0;
+ }
+
+ call->state = AFS_CALL_AWAIT_REQUEST;
+
+ /* ask the cache manager to route the call (it'll change the call type
+ * if successful) */
+ if (!afs_cm_incoming_call(call))
+ return -ENOTSUPP;
+
+ /* pass responsibility for the remainer of this message off to the
+ * cache manager op */
+ return call->type->deliver(call, skb, last);
+}
+
+/*
+ * send an empty reply
+ */
+void afs_send_empty_reply(struct afs_call *call)
+{
+ struct msghdr msg;
+ struct iovec iov[1];
+
+ _enter("");
+
+ iov[0].iov_base = NULL;
+ iov[0].iov_len = 0;
+ msg.msg_name = NULL;
+ msg.msg_namelen = 0;
+ msg.msg_iov = iov;
+ msg.msg_iovlen = 0;
+ msg.msg_control = NULL;
+ msg.msg_controllen = 0;
+ msg.msg_flags = 0;
+
+ call->state = AFS_CALL_AWAIT_ACK;
+ switch (rxrpc_kernel_send_data(call->rxcall, &msg, 0)) {
+ case 0:
+ _leave(" [replied]");
+ return;
+
+ case -ENOMEM:
+ _debug("oom");
+ rxrpc_kernel_abort_call(call->rxcall, RX_USER_ABORT);
+ default:
+ rxrpc_kernel_end_call(call->rxcall);
+ call->rxcall = NULL;
+ call->type->destructor(call);
+ afs_free_call(call);
+ _leave(" [error]");
+ return;
+ }
+}
+
+/*
+ * send a simple reply
+ */
+void afs_send_simple_reply(struct afs_call *call, const void *buf, size_t len)
+{
+ struct msghdr msg;
+ struct iovec iov[1];
+
+ _enter("");
+
+ iov[0].iov_base = (void *) buf;
+ iov[0].iov_len = len;
+ msg.msg_name = NULL;
+ msg.msg_namelen = 0;
+ msg.msg_iov = iov;
+ msg.msg_iovlen = 1;
+ msg.msg_control = NULL;
+ msg.msg_controllen = 0;
+ msg.msg_flags = 0;
+
+ call->state = AFS_CALL_AWAIT_ACK;
+ switch (rxrpc_kernel_send_data(call->rxcall, &msg, len)) {
+ case 0:
+ _leave(" [replied]");
+ return;
+
+ case -ENOMEM:
+ _debug("oom");
+ rxrpc_kernel_abort_call(call->rxcall, RX_USER_ABORT);
+ default:
+ rxrpc_kernel_end_call(call->rxcall);
+ call->rxcall = NULL;
+ call->type->destructor(call);
+ afs_free_call(call);
+ _leave(" [error]");
+ return;
+ }
+}
+
+/*
+ * extract a piece of data from the received data socket buffers
+ */
+int afs_extract_data(struct afs_call *call, struct sk_buff *skb,
+ bool last, void *buf, size_t count)
+{
+ size_t len = skb->len;
+
+ _enter("{%u},{%zu},%d,,%zu", call->offset, len, last, count);
+
+ ASSERTCMP(call->offset, <, count);
+
+ len = min_t(size_t, len, count - call->offset);
+ if (skb_copy_bits(skb, 0, buf + call->offset, len) < 0 ||
+ !pskb_pull(skb, len))
+ BUG();
+ call->offset += len;
+
+ if (call->offset < count) {
+ if (last) {
+ _leave(" = -EBADMSG [%d < %zu]", call->offset, count);
+ return -EBADMSG;
+ }
+ _leave(" = -EAGAIN");
+ return -EAGAIN;
+ }
+ return 0;
+}
diff --git a/fs/afs/security.c b/fs/afs/security.c
new file mode 100644
index 00000000000..f9f424d8045
--- /dev/null
+++ b/fs/afs/security.c
@@ -0,0 +1,356 @@
+/* AFS security handling
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/ctype.h>
+#include <keys/rxrpc-type.h>
+#include "internal.h"
+
+/*
+ * get a key
+ */
+struct key *afs_request_key(struct afs_cell *cell)
+{
+ struct key *key;
+
+ _enter("{%x}", key_serial(cell->anonymous_key));
+
+ _debug("key %s", cell->anonymous_key->description);
+ key = request_key(&key_type_rxrpc, cell->anonymous_key->description,
+ NULL);
+ if (IS_ERR(key)) {
+ if (PTR_ERR(key) != -ENOKEY) {
+ _leave(" = %ld", PTR_ERR(key));
+ return key;
+ }
+
+ /* act as anonymous user */
+ _leave(" = {%x} [anon]", key_serial(cell->anonymous_key));
+ return key_get(cell->anonymous_key);
+ } else {
+ /* act as authorised user */
+ _leave(" = {%x} [auth]", key_serial(key));
+ return key;
+ }
+}
+
+/*
+ * dispose of a permits list
+ */
+void afs_zap_permits(struct rcu_head *rcu)
+{
+ struct afs_permits *permits =
+ container_of(rcu, struct afs_permits, rcu);
+ int loop;
+
+ _enter("{%d}", permits->count);
+
+ for (loop = permits->count - 1; loop >= 0; loop--)
+ key_put(permits->permits[loop].key);
+ kfree(permits);
+}
+
+/*
+ * dispose of a permits list in which all the key pointers have been copied
+ */
+static void afs_dispose_of_permits(struct rcu_head *rcu)
+{
+ struct afs_permits *permits =
+ container_of(rcu, struct afs_permits, rcu);
+
+ _enter("{%d}", permits->count);
+
+ kfree(permits);
+}
+
+/*
+ * get the authorising vnode - this is the specified inode itself if it's a
+ * directory or it's the parent directory if the specified inode is a file or
+ * symlink
+ * - the caller must release the ref on the inode
+ */
+static struct afs_vnode *afs_get_auth_inode(struct afs_vnode *vnode,
+ struct key *key)
+{
+ struct afs_vnode *auth_vnode;
+ struct inode *auth_inode;
+
+ _enter("");
+
+ if (S_ISDIR(vnode->vfs_inode.i_mode)) {
+ auth_inode = igrab(&vnode->vfs_inode);
+ ASSERT(auth_inode != NULL);
+ } else {
+ auth_inode = afs_iget(vnode->vfs_inode.i_sb, key,
+ &vnode->status.parent, NULL, NULL);
+ if (IS_ERR(auth_inode))
+ return ERR_PTR(PTR_ERR(auth_inode));
+ }
+
+ auth_vnode = AFS_FS_I(auth_inode);
+ _leave(" = {%x}", auth_vnode->fid.vnode);
+ return auth_vnode;
+}
+
+/*
+ * clear the permit cache on a directory vnode
+ */
+void afs_clear_permits(struct afs_vnode *vnode)
+{
+ struct afs_permits *permits;
+
+ _enter("{%x}", vnode->fid.vnode);
+
+ mutex_lock(&vnode->permits_lock);
+ permits = vnode->permits;
+ rcu_assign_pointer(vnode->permits, NULL);
+ mutex_unlock(&vnode->permits_lock);
+
+ if (permits)
+ call_rcu(&permits->rcu, afs_zap_permits);
+ _leave("");
+}
+
+/*
+ * add the result obtained for a vnode to its or its parent directory's cache
+ * for the key used to access it
+ */
+void afs_cache_permit(struct afs_vnode *vnode, struct key *key, long acl_order)
+{
+ struct afs_permits *permits, *xpermits;
+ struct afs_permit *permit;
+ struct afs_vnode *auth_vnode;
+ int count, loop;
+
+ _enter("{%x},%x,%lx", vnode->fid.vnode, key_serial(key), acl_order);
+
+ auth_vnode = afs_get_auth_inode(vnode, key);
+ if (IS_ERR(auth_vnode)) {
+ _leave(" [get error %ld]", PTR_ERR(auth_vnode));
+ return;
+ }
+
+ mutex_lock(&auth_vnode->permits_lock);
+
+ /* guard against a rename being detected whilst we waited for the
+ * lock */
+ if (memcmp(&auth_vnode->fid, &vnode->status.parent,
+ sizeof(struct afs_fid)) != 0) {
+ _debug("renamed");
+ goto out_unlock;
+ }
+
+ /* have to be careful as the directory's callback may be broken between
+ * us receiving the status we're trying to cache and us getting the
+ * lock to update the cache for the status */
+ if (auth_vnode->acl_order - acl_order > 0) {
+ _debug("ACL changed?");
+ goto out_unlock;
+ }
+
+ /* always update the anonymous mask */
+ _debug("anon access %x", vnode->status.anon_access);
+ auth_vnode->status.anon_access = vnode->status.anon_access;
+ if (key == vnode->volume->cell->anonymous_key)
+ goto out_unlock;
+
+ xpermits = auth_vnode->permits;
+ count = 0;
+ if (xpermits) {
+ /* see if the permit is already in the list
+ * - if it is then we just amend the list
+ */
+ count = xpermits->count;
+ permit = xpermits->permits;
+ for (loop = count; loop > 0; loop--) {
+ if (permit->key == key) {
+ permit->access_mask =
+ vnode->status.caller_access;
+ goto out_unlock;
+ }
+ permit++;
+ }
+ }
+
+ permits = kmalloc(sizeof(*permits) + sizeof(*permit) * (count + 1),
+ GFP_NOFS);
+ if (!permits)
+ goto out_unlock;
+
+ memcpy(permits->permits, xpermits->permits,
+ count * sizeof(struct afs_permit));
+
+ _debug("key %x access %x",
+ key_serial(key), vnode->status.caller_access);
+ permits->permits[count].access_mask = vnode->status.caller_access;
+ permits->permits[count].key = key_get(key);
+ permits->count = count + 1;
+
+ rcu_assign_pointer(auth_vnode->permits, permits);
+ if (xpermits)
+ call_rcu(&xpermits->rcu, afs_dispose_of_permits);
+
+out_unlock:
+ mutex_unlock(&auth_vnode->permits_lock);
+ iput(&auth_vnode->vfs_inode);
+ _leave("");
+}
+
+/*
+ * check with the fileserver to see if the directory or parent directory is
+ * permitted to be accessed with this authorisation, and if so, what access it
+ * is granted
+ */
+static int afs_check_permit(struct afs_vnode *vnode, struct key *key,
+ afs_access_t *_access)
+{
+ struct afs_permits *permits;
+ struct afs_permit *permit;
+ struct afs_vnode *auth_vnode;
+ bool valid;
+ int loop, ret;
+
+ _enter("");
+
+ auth_vnode = afs_get_auth_inode(vnode, key);
+ if (IS_ERR(auth_vnode)) {
+ *_access = 0;
+ _leave(" = %ld", PTR_ERR(auth_vnode));
+ return PTR_ERR(auth_vnode);
+ }
+
+ ASSERT(S_ISDIR(auth_vnode->vfs_inode.i_mode));
+
+ /* check the permits to see if we've got one yet */
+ if (key == auth_vnode->volume->cell->anonymous_key) {
+ _debug("anon");
+ *_access = auth_vnode->status.anon_access;
+ valid = true;
+ } else {
+ valid = false;
+ rcu_read_lock();
+ permits = rcu_dereference(auth_vnode->permits);
+ if (permits) {
+ permit = permits->permits;
+ for (loop = permits->count; loop > 0; loop--) {
+ if (permit->key == key) {
+ _debug("found in cache");
+ *_access = permit->access_mask;
+ valid = true;
+ break;
+ }
+ permit++;
+ }
+ }
+ rcu_read_unlock();
+ }
+
+ if (!valid) {
+ /* check the status on the file we're actually interested in
+ * (the post-processing will cache the result on auth_vnode) */
+ _debug("no valid permit");
+
+ set_bit(AFS_VNODE_CB_BROKEN, &vnode->flags);
+ ret = afs_vnode_fetch_status(vnode, auth_vnode, key);
+ if (ret < 0) {
+ iput(&auth_vnode->vfs_inode);
+ *_access = 0;
+ _leave(" = %d", ret);
+ return ret;
+ }
+ }
+
+ *_access = vnode->status.caller_access;
+ iput(&auth_vnode->vfs_inode);
+ _leave(" = 0 [access %x]", *_access);
+ return 0;
+}
+
+/*
+ * check the permissions on an AFS file
+ * - AFS ACLs are attached to directories only, and a file is controlled by its
+ * parent directory's ACL
+ */
+int afs_permission(struct inode *inode, int mask, struct nameidata *nd)
+{
+ struct afs_vnode *vnode = AFS_FS_I(inode);
+ afs_access_t access;
+ struct key *key;
+ int ret;
+
+ _enter("{{%x:%x},%lx},%x,",
+ vnode->fid.vid, vnode->fid.vnode, vnode->flags, mask);
+
+ key = afs_request_key(vnode->volume->cell);
+ if (IS_ERR(key)) {
+ _leave(" = %ld [key]", PTR_ERR(key));
+ return PTR_ERR(key);
+ }
+
+ /* if the promise has expired, we need to check the server again */
+ if (!vnode->cb_promised) {
+ _debug("not promised");
+ ret = afs_vnode_fetch_status(vnode, NULL, key);
+ if (ret < 0)
+ goto error;
+ _debug("new promise [fl=%lx]", vnode->flags);
+ }
+
+ /* check the permits to see if we've got one yet */
+ ret = afs_check_permit(vnode, key, &access);
+ if (ret < 0)
+ goto error;
+
+ /* interpret the access mask */
+ _debug("REQ %x ACC %x on %s",
+ mask, access, S_ISDIR(inode->i_mode) ? "dir" : "file");
+
+ if (S_ISDIR(inode->i_mode)) {
+ if (mask & MAY_EXEC) {
+ if (!(access & AFS_ACE_LOOKUP))
+ goto permission_denied;
+ } else if (mask & MAY_READ) {
+ if (!(access & AFS_ACE_READ))
+ goto permission_denied;
+ } else if (mask & MAY_WRITE) {
+ if (!(access & (AFS_ACE_DELETE | /* rmdir, unlink, rename from */
+ AFS_ACE_INSERT | /* create, mkdir, symlink, rename to */
+ AFS_ACE_WRITE))) /* chmod */
+ goto permission_denied;
+ } else {
+ BUG();
+ }
+ } else {
+ if (!(access & AFS_ACE_LOOKUP))
+ goto permission_denied;
+ if (mask & (MAY_EXEC | MAY_READ)) {
+ if (!(access & AFS_ACE_READ))
+ goto permission_denied;
+ } else if (mask & MAY_WRITE) {
+ if (!(access & AFS_ACE_WRITE))
+ goto permission_denied;
+ }
+ }
+
+ key_put(key);
+ ret = generic_permission(inode, mask, NULL);
+ _leave(" = %d", ret);
+ return ret;
+
+permission_denied:
+ ret = -EACCES;
+error:
+ key_put(key);
+ _leave(" = %d", ret);
+ return ret;
+}
diff --git a/fs/afs/server.c b/fs/afs/server.c
index 44aff81dc6a..96bb23b476a 100644
--- a/fs/afs/server.c
+++ b/fs/afs/server.c
@@ -1,6 +1,6 @@
-/* server.c: AFS server record management
+/* AFS server record management
*
- * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
+ * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
@@ -11,489 +11,314 @@
#include <linux/sched.h>
#include <linux/slab.h>
-#include <rxrpc/peer.h>
-#include <rxrpc/connection.h>
-#include "volume.h"
-#include "cell.h"
-#include "server.h"
-#include "transport.h"
-#include "vlclient.h"
-#include "kafstimod.h"
#include "internal.h"
-DEFINE_SPINLOCK(afs_server_peer_lock);
+unsigned afs_server_timeout = 10; /* server timeout in seconds */
-#define FS_SERVICE_ID 1 /* AFS Volume Location Service ID */
-#define VL_SERVICE_ID 52 /* AFS Volume Location Service ID */
+static void afs_reap_server(struct work_struct *);
-static void __afs_server_timeout(struct afs_timer *timer)
+/* tree of all the servers, indexed by IP address */
+static struct rb_root afs_servers = RB_ROOT;
+static DEFINE_RWLOCK(afs_servers_lock);
+
+/* LRU list of all the servers not currently in use */
+static LIST_HEAD(afs_server_graveyard);
+static DEFINE_SPINLOCK(afs_server_graveyard_lock);
+static DECLARE_DELAYED_WORK(afs_server_reaper, afs_reap_server);
+
+/*
+ * install a server record in the master tree
+ */
+static int afs_install_server(struct afs_server *server)
{
- struct afs_server *server =
- list_entry(timer, struct afs_server, timeout);
+ struct afs_server *xserver;
+ struct rb_node **pp, *p;
+ int ret;
- _debug("SERVER TIMEOUT [%p{u=%d}]",
- server, atomic_read(&server->usage));
+ _enter("%p", server);
- afs_server_do_timeout(server);
-}
+ write_lock(&afs_servers_lock);
+
+ ret = -EEXIST;
+ pp = &afs_servers.rb_node;
+ p = NULL;
+ while (*pp) {
+ p = *pp;
+ _debug("- consider %p", p);
+ xserver = rb_entry(p, struct afs_server, master_rb);
+ if (server->addr.s_addr < xserver->addr.s_addr)
+ pp = &(*pp)->rb_left;
+ else if (server->addr.s_addr > xserver->addr.s_addr)
+ pp = &(*pp)->rb_right;
+ else
+ goto error;
+ }
-static const struct afs_timer_ops afs_server_timer_ops = {
- .timed_out = __afs_server_timeout,
-};
+ rb_link_node(&server->master_rb, p, pp);
+ rb_insert_color(&server->master_rb, &afs_servers);
+ ret = 0;
+
+error:
+ write_unlock(&afs_servers_lock);
+ return ret;
+}
-/*****************************************************************************/
/*
- * lookup a server record in a cell
- * - TODO: search the cell's server list
+ * allocate a new server record
*/
-int afs_server_lookup(struct afs_cell *cell, const struct in_addr *addr,
- struct afs_server **_server)
+static struct afs_server *afs_alloc_server(struct afs_cell *cell,
+ const struct in_addr *addr)
{
- struct afs_server *server, *active, *zombie;
- int loop;
+ struct afs_server *server;
- _enter("%p,%08x,", cell, ntohl(addr->s_addr));
+ _enter("");
- /* allocate and initialise a server record */
server = kzalloc(sizeof(struct afs_server), GFP_KERNEL);
- if (!server) {
- _leave(" = -ENOMEM");
- return -ENOMEM;
+ if (server) {
+ atomic_set(&server->usage, 1);
+ server->cell = cell;
+
+ INIT_LIST_HEAD(&server->link);
+ INIT_LIST_HEAD(&server->grave);
+ init_rwsem(&server->sem);
+ spin_lock_init(&server->fs_lock);
+ server->fs_vnodes = RB_ROOT;
+ server->cb_promises = RB_ROOT;
+ spin_lock_init(&server->cb_lock);
+ init_waitqueue_head(&server->cb_break_waitq);
+ INIT_DELAYED_WORK(&server->cb_break_work,
+ afs_dispatch_give_up_callbacks);
+
+ memcpy(&server->addr, addr, sizeof(struct in_addr));
+ server->addr.s_addr = addr->s_addr;
}
- atomic_set(&server->usage, 1);
-
- INIT_LIST_HEAD(&server->link);
- init_rwsem(&server->sem);
- INIT_LIST_HEAD(&server->fs_callq);
- spin_lock_init(&server->fs_lock);
- INIT_LIST_HEAD(&server->cb_promises);
- spin_lock_init(&server->cb_lock);
-
- for (loop = 0; loop < AFS_SERVER_CONN_LIST_SIZE; loop++)
- server->fs_conn_cnt[loop] = 4;
+ _leave(" = %p{%d}", server, atomic_read(&server->usage));
+ return server;
+}
- memcpy(&server->addr, addr, sizeof(struct in_addr));
- server->addr.s_addr = addr->s_addr;
+/*
+ * get an FS-server record for a cell
+ */
+struct afs_server *afs_lookup_server(struct afs_cell *cell,
+ const struct in_addr *addr)
+{
+ struct afs_server *server, *candidate;
- afs_timer_init(&server->timeout, &afs_server_timer_ops);
+ _enter("%p,"NIPQUAD_FMT, cell, NIPQUAD(addr->s_addr));
- /* add to the cell */
- write_lock(&cell->sv_lock);
+ /* quick scan of the list to see if we already have the server */
+ read_lock(&cell->servers_lock);
- /* check the active list */
- list_for_each_entry(active, &cell->sv_list, link) {
- if (active->addr.s_addr == addr->s_addr)
- goto use_active_server;
+ list_for_each_entry(server, &cell->servers, link) {
+ if (server->addr.s_addr == addr->s_addr)
+ goto found_server_quickly;
}
+ read_unlock(&cell->servers_lock);
- /* check the inactive list */
- spin_lock(&cell->sv_gylock);
- list_for_each_entry(zombie, &cell->sv_graveyard, link) {
- if (zombie->addr.s_addr == addr->s_addr)
- goto resurrect_server;
+ candidate = afs_alloc_server(cell, addr);
+ if (!candidate) {
+ _leave(" = -ENOMEM");
+ return ERR_PTR(-ENOMEM);
}
- spin_unlock(&cell->sv_gylock);
- afs_get_cell(cell);
- server->cell = cell;
- list_add_tail(&server->link, &cell->sv_list);
+ write_lock(&cell->servers_lock);
- write_unlock(&cell->sv_lock);
+ /* check the cell's server list again */
+ list_for_each_entry(server, &cell->servers, link) {
+ if (server->addr.s_addr == addr->s_addr)
+ goto found_server;
+ }
- *_server = server;
- _leave(" = 0 (%p)", server);
- return 0;
+ _debug("new");
+ server = candidate;
+ if (afs_install_server(server) < 0)
+ goto server_in_two_cells;
- /* found a matching active server */
- use_active_server:
- _debug("active server");
- afs_get_server(active);
- write_unlock(&cell->sv_lock);
+ afs_get_cell(cell);
+ list_add_tail(&server->link, &cell->servers);
+
+ write_unlock(&cell->servers_lock);
+ _leave(" = %p{%d}", server, atomic_read(&server->usage));
+ return server;
+
+ /* found a matching server quickly */
+found_server_quickly:
+ _debug("found quickly");
+ afs_get_server(server);
+ read_unlock(&cell->servers_lock);
+no_longer_unused:
+ if (!list_empty(&server->grave)) {
+ spin_lock(&afs_server_graveyard_lock);
+ list_del_init(&server->grave);
+ spin_unlock(&afs_server_graveyard_lock);
+ }
+ _leave(" = %p{%d}", server, atomic_read(&server->usage));
+ return server;
+
+ /* found a matching server on the second pass */
+found_server:
+ _debug("found");
+ afs_get_server(server);
+ write_unlock(&cell->servers_lock);
+ kfree(candidate);
+ goto no_longer_unused;
+
+ /* found a server that seems to be in two cells */
+server_in_two_cells:
+ write_unlock(&cell->servers_lock);
+ kfree(candidate);
+ printk(KERN_NOTICE "kAFS:"
+ " Server "NIPQUAD_FMT" appears to be in two cells\n",
+ NIPQUAD(*addr));
+ _leave(" = -EEXIST");
+ return ERR_PTR(-EEXIST);
+}
- kfree(server);
+/*
+ * look up a server by its IP address
+ */
+struct afs_server *afs_find_server(const struct in_addr *_addr)
+{
+ struct afs_server *server = NULL;
+ struct rb_node *p;
+ struct in_addr addr = *_addr;
- *_server = active;
- _leave(" = 0 (%p)", active);
- return 0;
+ _enter(NIPQUAD_FMT, NIPQUAD(addr.s_addr));
- /* found a matching server in the graveyard, so resurrect it and
- * dispose of the new record */
- resurrect_server:
- _debug("resurrecting server");
+ read_lock(&afs_servers_lock);
- list_move_tail(&zombie->link, &cell->sv_list);
- afs_get_server(zombie);
- afs_kafstimod_del_timer(&zombie->timeout);
- spin_unlock(&cell->sv_gylock);
- write_unlock(&cell->sv_lock);
+ p = afs_servers.rb_node;
+ while (p) {
+ server = rb_entry(p, struct afs_server, master_rb);
- kfree(server);
+ _debug("- consider %p", p);
- *_server = zombie;
- _leave(" = 0 (%p)", zombie);
- return 0;
+ if (addr.s_addr < server->addr.s_addr) {
+ p = p->rb_left;
+ } else if (addr.s_addr > server->addr.s_addr) {
+ p = p->rb_right;
+ } else {
+ afs_get_server(server);
+ goto found;
+ }
+ }
-} /* end afs_server_lookup() */
+ server = NULL;
+found:
+ read_unlock(&afs_servers_lock);
+ ASSERTIFCMP(server, server->addr.s_addr, ==, addr.s_addr);
+ _leave(" = %p", server);
+ return server;
+}
-/*****************************************************************************/
/*
* destroy a server record
* - removes from the cell list
*/
void afs_put_server(struct afs_server *server)
{
- struct afs_cell *cell;
-
if (!server)
return;
- _enter("%p", server);
-
- cell = server->cell;
+ _enter("%p{%d}", server, atomic_read(&server->usage));
- /* sanity check */
- BUG_ON(atomic_read(&server->usage) <= 0);
+ _debug("PUT SERVER %d", atomic_read(&server->usage));
- /* to prevent a race, the decrement and the dequeue must be effectively
- * atomic */
- write_lock(&cell->sv_lock);
+ ASSERTCMP(atomic_read(&server->usage), >, 0);
if (likely(!atomic_dec_and_test(&server->usage))) {
- write_unlock(&cell->sv_lock);
_leave("");
return;
}
- spin_lock(&cell->sv_gylock);
- list_move_tail(&server->link, &cell->sv_graveyard);
+ afs_flush_callback_breaks(server);
- /* time out in 10 secs */
- afs_kafstimod_add_timer(&server->timeout, 10 * HZ);
-
- spin_unlock(&cell->sv_gylock);
- write_unlock(&cell->sv_lock);
-
- _leave(" [killed]");
-} /* end afs_put_server() */
+ spin_lock(&afs_server_graveyard_lock);
+ if (atomic_read(&server->usage) == 0) {
+ list_move_tail(&server->grave, &afs_server_graveyard);
+ server->time_of_death = get_seconds();
+ schedule_delayed_work(&afs_server_reaper,
+ afs_server_timeout * HZ);
+ }
+ spin_unlock(&afs_server_graveyard_lock);
+ _leave(" [dead]");
+}
-/*****************************************************************************/
/*
- * timeout server record
- * - removes from the cell's graveyard if the usage count is zero
+ * destroy a dead server
*/
-void afs_server_do_timeout(struct afs_server *server)
+static void afs_destroy_server(struct afs_server *server)
{
- struct rxrpc_peer *peer;
- struct afs_cell *cell;
- int loop;
-
_enter("%p", server);
- cell = server->cell;
-
- BUG_ON(atomic_read(&server->usage) < 0);
-
- /* remove from graveyard if still dead */
- spin_lock(&cell->vl_gylock);
- if (atomic_read(&server->usage) == 0)
- list_del_init(&server->link);
- else
- server = NULL;
- spin_unlock(&cell->vl_gylock);
-
- if (!server) {
- _leave("");
- return; /* resurrected */
- }
-
- /* we can now destroy it properly */
- afs_put_cell(cell);
-
- /* uncross-point the structs under a global lock */
- spin_lock(&afs_server_peer_lock);
- peer = server->peer;
- if (peer) {
- server->peer = NULL;
- peer->user = NULL;
- }
- spin_unlock(&afs_server_peer_lock);
-
- /* finish cleaning up the server */
- for (loop = AFS_SERVER_CONN_LIST_SIZE - 1; loop >= 0; loop--)
- if (server->fs_conn[loop])
- rxrpc_put_connection(server->fs_conn[loop]);
-
- if (server->vlserver)
- rxrpc_put_connection(server->vlserver);
+ ASSERTCMP(server->fs_vnodes.rb_node, ==, NULL);
+ ASSERTCMP(server->cb_promises.rb_node, ==, NULL);
+ ASSERTCMP(server->cb_break_head, ==, server->cb_break_tail);
+ ASSERTCMP(atomic_read(&server->cb_break_n), ==, 0);
+ afs_put_cell(server->cell);
kfree(server);
+}
- _leave(" [destroyed]");
-} /* end afs_server_do_timeout() */
-
-/*****************************************************************************/
/*
- * get a callslot on a connection to the fileserver on the specified server
+ * reap dead server records
*/
-int afs_server_request_callslot(struct afs_server *server,
- struct afs_server_callslot *callslot)
+static void afs_reap_server(struct work_struct *work)
{
- struct afs_server_callslot *pcallslot;
- struct rxrpc_connection *conn;
- int nconn, ret;
-
- _enter("%p,",server);
-
- INIT_LIST_HEAD(&callslot->link);
- callslot->task = current;
- callslot->conn = NULL;
- callslot->nconn = -1;
- callslot->ready = 0;
-
- ret = 0;
- conn = NULL;
-
- /* get hold of a callslot first */
- spin_lock(&server->fs_lock);
-
- /* resurrect the server if it's death timeout has expired */
- if (server->fs_state) {
- if (time_before(jiffies, server->fs_dead_jif)) {
- ret = server->fs_state;
- spin_unlock(&server->fs_lock);
- _leave(" = %d [still dead]", ret);
- return ret;
+ LIST_HEAD(corpses);
+ struct afs_server *server;
+ unsigned long delay, expiry;
+ time_t now;
+
+ now = get_seconds();
+ spin_lock(&afs_server_graveyard_lock);
+
+ while (!list_empty(&afs_server_graveyard)) {
+ server = list_entry(afs_server_graveyard.next,
+ struct afs_server, grave);
+
+ /* the queue is ordered most dead first */
+ expiry = server->time_of_death + afs_server_timeout;
+ if (expiry > now) {
+ delay = (expiry - now) * HZ;
+ if (!schedule_delayed_work(&afs_server_reaper, delay)) {
+ cancel_delayed_work(&afs_server_reaper);
+ schedule_delayed_work(&afs_server_reaper,
+ delay);
+ }
+ break;
}
- server->fs_state = 0;
- }
-
- /* try and find a connection that has spare callslots */
- for (nconn = 0; nconn < AFS_SERVER_CONN_LIST_SIZE; nconn++) {
- if (server->fs_conn_cnt[nconn] > 0) {
- server->fs_conn_cnt[nconn]--;
- spin_unlock(&server->fs_lock);
- callslot->nconn = nconn;
- goto obtained_slot;
+ write_lock(&server->cell->servers_lock);
+ write_lock(&afs_servers_lock);
+ if (atomic_read(&server->usage) > 0) {
+ list_del_init(&server->grave);
+ } else {
+ list_move_tail(&server->grave, &corpses);
+ list_del_init(&server->link);
+ rb_erase(&server->master_rb, &afs_servers);
}
+ write_unlock(&afs_servers_lock);
+ write_unlock(&server->cell->servers_lock);
}
- /* none were available - wait interruptibly for one to become
- * available */
- set_current_state(TASK_INTERRUPTIBLE);
- list_add_tail(&callslot->link, &server->fs_callq);
- spin_unlock(&server->fs_lock);
-
- while (!callslot->ready && !signal_pending(current)) {
- schedule();
- set_current_state(TASK_INTERRUPTIBLE);
- }
-
- set_current_state(TASK_RUNNING);
-
- /* even if we were interrupted we may still be queued */
- if (!callslot->ready) {
- spin_lock(&server->fs_lock);
- list_del_init(&callslot->link);
- spin_unlock(&server->fs_lock);
- }
-
- nconn = callslot->nconn;
+ spin_unlock(&afs_server_graveyard_lock);
- /* if interrupted, we must release any slot we also got before
- * returning an error */
- if (signal_pending(current)) {
- ret = -EINTR;
- goto error_release;
+ /* now reap the corpses we've extracted */
+ while (!list_empty(&corpses)) {
+ server = list_entry(corpses.next, struct afs_server, grave);
+ list_del(&server->grave);
+ afs_destroy_server(server);
}
+}
- /* if we were woken up with an error, then pass that error back to the
- * called */
- if (nconn < 0) {
- _leave(" = %d", callslot->errno);
- return callslot->errno;
- }
-
- /* were we given a connection directly? */
- if (callslot->conn) {
- /* yes - use it */
- _leave(" = 0 (nc=%d)", nconn);
- return 0;
- }
-
- /* got a callslot, but no connection */
- obtained_slot:
-
- /* need to get hold of the RxRPC connection */
- down_write(&server->sem);
-
- /* quick check to see if there's an outstanding error */
- ret = server->fs_state;
- if (ret)
- goto error_release_upw;
-
- if (server->fs_conn[nconn]) {
- /* reuse an existing connection */
- rxrpc_get_connection(server->fs_conn[nconn]);
- callslot->conn = server->fs_conn[nconn];
- }
- else {
- /* create a new connection */
- ret = rxrpc_create_connection(afs_transport,
- htons(7000),
- server->addr.s_addr,
- FS_SERVICE_ID,
- NULL,
- &server->fs_conn[nconn]);
-
- if (ret < 0)
- goto error_release_upw;
-
- callslot->conn = server->fs_conn[0];
- rxrpc_get_connection(callslot->conn);
- }
-
- up_write(&server->sem);
-
- _leave(" = 0");
- return 0;
-
- /* handle an error occurring */
- error_release_upw:
- up_write(&server->sem);
-
- error_release:
- /* either release the callslot or pass it along to another deserving
- * task */
- spin_lock(&server->fs_lock);
-
- if (nconn < 0) {
- /* no callslot allocated */
- }
- else if (list_empty(&server->fs_callq)) {
- /* no one waiting */
- server->fs_conn_cnt[nconn]++;
- spin_unlock(&server->fs_lock);
- }
- else {
- /* someone's waiting - dequeue them and wake them up */
- pcallslot = list_entry(server->fs_callq.next,
- struct afs_server_callslot, link);
- list_del_init(&pcallslot->link);
-
- pcallslot->errno = server->fs_state;
- if (!pcallslot->errno) {
- /* pass them out callslot details */
- callslot->conn = xchg(&pcallslot->conn,
- callslot->conn);
- pcallslot->nconn = nconn;
- callslot->nconn = nconn = -1;
- }
- pcallslot->ready = 1;
- wake_up_process(pcallslot->task);
- spin_unlock(&server->fs_lock);
- }
-
- rxrpc_put_connection(callslot->conn);
- callslot->conn = NULL;
-
- _leave(" = %d", ret);
- return ret;
-
-} /* end afs_server_request_callslot() */
-
-/*****************************************************************************/
-/*
- * release a callslot back to the server
- * - transfers the RxRPC connection to the next pending callslot if possible
- */
-void afs_server_release_callslot(struct afs_server *server,
- struct afs_server_callslot *callslot)
-{
- struct afs_server_callslot *pcallslot;
-
- _enter("{ad=%08x,cnt=%u},{%d}",
- ntohl(server->addr.s_addr),
- server->fs_conn_cnt[callslot->nconn],
- callslot->nconn);
-
- BUG_ON(callslot->nconn < 0);
-
- spin_lock(&server->fs_lock);
-
- if (list_empty(&server->fs_callq)) {
- /* no one waiting */
- server->fs_conn_cnt[callslot->nconn]++;
- spin_unlock(&server->fs_lock);
- }
- else {
- /* someone's waiting - dequeue them and wake them up */
- pcallslot = list_entry(server->fs_callq.next,
- struct afs_server_callslot, link);
- list_del_init(&pcallslot->link);
-
- pcallslot->errno = server->fs_state;
- if (!pcallslot->errno) {
- /* pass them out callslot details */
- callslot->conn = xchg(&pcallslot->conn, callslot->conn);
- pcallslot->nconn = callslot->nconn;
- callslot->nconn = -1;
- }
-
- pcallslot->ready = 1;
- wake_up_process(pcallslot->task);
- spin_unlock(&server->fs_lock);
- }
-
- rxrpc_put_connection(callslot->conn);
-
- _leave("");
-} /* end afs_server_release_callslot() */
-
-/*****************************************************************************/
/*
- * get a handle to a connection to the vlserver (volume location) on the
- * specified server
+ * discard all the server records for rmmod
*/
-int afs_server_get_vlconn(struct afs_server *server,
- struct rxrpc_connection **_conn)
+void __exit afs_purge_servers(void)
{
- struct rxrpc_connection *conn;
- int ret;
-
- _enter("%p,", server);
-
- ret = 0;
- conn = NULL;
- down_read(&server->sem);
-
- if (server->vlserver) {
- /* reuse an existing connection */
- rxrpc_get_connection(server->vlserver);
- conn = server->vlserver;
- up_read(&server->sem);
- }
- else {
- /* create a new connection */
- up_read(&server->sem);
- down_write(&server->sem);
- if (!server->vlserver) {
- ret = rxrpc_create_connection(afs_transport,
- htons(7003),
- server->addr.s_addr,
- VL_SERVICE_ID,
- NULL,
- &server->vlserver);
- }
- if (ret == 0) {
- rxrpc_get_connection(server->vlserver);
- conn = server->vlserver;
- }
- up_write(&server->sem);
- }
-
- *_conn = conn;
- _leave(" = %d", ret);
- return ret;
-} /* end afs_server_get_vlconn() */
+ afs_server_timeout = 0;
+ cancel_delayed_work(&afs_server_reaper);
+ schedule_delayed_work(&afs_server_reaper, 0);
+}
diff --git a/fs/afs/server.h b/fs/afs/server.h
deleted file mode 100644
index c3d24115578..00000000000
--- a/fs/afs/server.h
+++ /dev/null
@@ -1,102 +0,0 @@
-/* server.h: AFS server record
- *
- * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#ifndef _LINUX_AFS_SERVER_H
-#define _LINUX_AFS_SERVER_H
-
-#include "types.h"
-#include "kafstimod.h"
-#include <rxrpc/peer.h>
-#include <linux/rwsem.h>
-
-extern spinlock_t afs_server_peer_lock;
-
-/*****************************************************************************/
-/*
- * AFS server record
- */
-struct afs_server
-{
- atomic_t usage;
- struct afs_cell *cell; /* cell in which server resides */
- struct list_head link; /* link in cell's server list */
- struct rw_semaphore sem; /* access lock */
- struct afs_timer timeout; /* graveyard timeout */
- struct in_addr addr; /* server address */
- struct rxrpc_peer *peer; /* peer record for this server */
- struct rxrpc_connection *vlserver; /* connection to the volume location service */
-
- /* file service access */
-#define AFS_SERVER_CONN_LIST_SIZE 2
- struct rxrpc_connection *fs_conn[AFS_SERVER_CONN_LIST_SIZE]; /* FS connections */
- unsigned fs_conn_cnt[AFS_SERVER_CONN_LIST_SIZE]; /* per conn call count */
- struct list_head fs_callq; /* queue of processes waiting to make a call */
- spinlock_t fs_lock; /* access lock */
- int fs_state; /* 0 or reason FS currently marked dead (-errno) */
- unsigned fs_rtt; /* FS round trip time */
- unsigned long fs_act_jif; /* time at which last activity occurred */
- unsigned long fs_dead_jif; /* time at which no longer to be considered dead */
-
- /* callback promise management */
- struct list_head cb_promises; /* as yet unbroken promises from this server */
- spinlock_t cb_lock; /* access lock */
-};
-
-extern int afs_server_lookup(struct afs_cell *cell,
- const struct in_addr *addr,
- struct afs_server **_server);
-
-#define afs_get_server(S) do { atomic_inc(&(S)->usage); } while(0)
-
-extern void afs_put_server(struct afs_server *server);
-extern void afs_server_do_timeout(struct afs_server *server);
-
-extern int afs_server_find_by_peer(const struct rxrpc_peer *peer,
- struct afs_server **_server);
-
-extern int afs_server_get_vlconn(struct afs_server *server,
- struct rxrpc_connection **_conn);
-
-static inline
-struct afs_server *afs_server_get_from_peer(struct rxrpc_peer *peer)
-{
- struct afs_server *server;
-
- spin_lock(&afs_server_peer_lock);
- server = peer->user;
- if (server)
- afs_get_server(server);
- spin_unlock(&afs_server_peer_lock);
-
- return server;
-}
-
-/*****************************************************************************/
-/*
- * AFS server callslot grant record
- */
-struct afs_server_callslot
-{
- struct list_head link; /* link in server's list */
- struct task_struct *task; /* process waiting to make call */
- struct rxrpc_connection *conn; /* connection to use (or NULL on error) */
- short nconn; /* connection slot number (-1 on error) */
- char ready; /* T when ready */
- int errno; /* error number if nconn==-1 */
-};
-
-extern int afs_server_request_callslot(struct afs_server *server,
- struct afs_server_callslot *callslot);
-
-extern void afs_server_release_callslot(struct afs_server *server,
- struct afs_server_callslot *callslot);
-
-#endif /* _LINUX_AFS_SERVER_H */
diff --git a/fs/afs/super.c b/fs/afs/super.c
index eb7e32349da..41173f81ac4 100644
--- a/fs/afs/super.c
+++ b/fs/afs/super.c
@@ -1,5 +1,6 @@
-/*
- * Copyright (c) 2002 Red Hat, Inc. All rights reserved.
+/* AFS superblock handling
+ *
+ * Copyright (c) 2002, 2007 Red Hat, Inc. All rights reserved.
*
* This software may be freely redistributed under the terms of the
* GNU General Public License.
@@ -9,7 +10,7 @@
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Authors: David Howells <dhowells@redhat.com>
- * David Woodhouse <dwmw2@cambridge.redhat.com>
+ * David Woodhouse <dwmw2@redhat.com>
*
*/
@@ -19,22 +20,11 @@
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/pagemap.h>
-#include "vnode.h"
-#include "volume.h"
-#include "cell.h"
-#include "cmservice.h"
-#include "fsclient.h"
-#include "super.h"
+#include <linux/parser.h>
#include "internal.h"
#define AFS_FS_MAGIC 0x6B414653 /* 'kAFS' */
-struct afs_mount_params {
- int rwpath;
- struct afs_cell *default_cell;
- struct afs_volume *volume;
-};
-
static void afs_i_init_once(void *foo, struct kmem_cache *cachep,
unsigned long flags);
@@ -53,7 +43,7 @@ struct file_system_type afs_fs_type = {
.name = "afs",
.get_sb = afs_get_sb,
.kill_sb = kill_anon_super,
- .fs_flags = FS_BINARY_MOUNTDATA,
+ .fs_flags = 0,
};
static const struct super_operations afs_super_ops = {
@@ -62,13 +52,27 @@ static const struct super_operations afs_super_ops = {
.drop_inode = generic_delete_inode,
.destroy_inode = afs_destroy_inode,
.clear_inode = afs_clear_inode,
+ .umount_begin = afs_umount_begin,
.put_super = afs_put_super,
};
static struct kmem_cache *afs_inode_cachep;
static atomic_t afs_count_active_inodes;
-/*****************************************************************************/
+enum {
+ afs_no_opt,
+ afs_opt_cell,
+ afs_opt_rwpath,
+ afs_opt_vol,
+};
+
+static const match_table_t afs_options_list = {
+ { afs_opt_cell, "cell=%s" },
+ { afs_opt_rwpath, "rwpath" },
+ { afs_opt_vol, "vol=%s" },
+ { afs_no_opt, NULL },
+};
+
/*
* initialise the filesystem
*/
@@ -78,8 +82,6 @@ int __init afs_fs_init(void)
_enter("");
- afs_timer_init(&afs_mntpt_expiry_timer, &afs_mntpt_expiry_timer_ops);
-
/* create ourselves an inode cache */
atomic_set(&afs_count_active_inodes, 0);
@@ -99,20 +101,22 @@ int __init afs_fs_init(void)
ret = register_filesystem(&afs_fs_type);
if (ret < 0) {
kmem_cache_destroy(afs_inode_cachep);
- kleave(" = %d", ret);
+ _leave(" = %d", ret);
return ret;
}
- kleave(" = 0");
+ _leave(" = 0");
return 0;
-} /* end afs_fs_init() */
+}
-/*****************************************************************************/
/*
* clean up the filesystem
*/
void __exit afs_fs_exit(void)
{
+ _enter("");
+
+ afs_mntpt_kill_timer();
unregister_filesystem(&afs_fs_type);
if (atomic_read(&afs_count_active_inodes) != 0) {
@@ -122,99 +126,153 @@ void __exit afs_fs_exit(void)
}
kmem_cache_destroy(afs_inode_cachep);
+ _leave("");
+}
-} /* end afs_fs_exit() */
-
-/*****************************************************************************/
-/*
- * check that an argument has a value
- */
-static int want_arg(char **_value, const char *option)
-{
- if (!_value || !*_value || !**_value) {
- printk(KERN_NOTICE "kAFS: %s: argument missing\n", option);
- return 0;
- }
- return 1;
-} /* end want_arg() */
-
-/*****************************************************************************/
-/*
- * check that there's no subsequent value
- */
-static int want_no_value(char *const *_value, const char *option)
-{
- if (*_value && **_value) {
- printk(KERN_NOTICE "kAFS: %s: Invalid argument: %s\n",
- option, *_value);
- return 0;
- }
- return 1;
-} /* end want_no_value() */
-
-/*****************************************************************************/
/*
* parse the mount options
* - this function has been shamelessly adapted from the ext3 fs which
* shamelessly adapted it from the msdos fs
*/
-static int afs_super_parse_options(struct afs_mount_params *params,
- char *options,
- const char **devname)
+static int afs_parse_options(struct afs_mount_params *params,
+ char *options, const char **devname)
{
- char *key, *value;
- int ret;
+ struct afs_cell *cell;
+ substring_t args[MAX_OPT_ARGS];
+ char *p;
+ int token;
_enter("%s", options);
options[PAGE_SIZE - 1] = 0;
- ret = 0;
- while ((key = strsep(&options, ",")) != 0)
- {
- value = strchr(key, '=');
- if (value)
- *value++ = 0;
-
- printk("kAFS: KEY: %s, VAL:%s\n", key, value ?: "-");
+ while ((p = strsep(&options, ","))) {
+ if (!*p)
+ continue;
- if (strcmp(key, "rwpath") == 0) {
- if (!want_no_value(&value, "rwpath"))
- return -EINVAL;
+ token = match_token(p, afs_options_list, args);
+ switch (token) {
+ case afs_opt_cell:
+ cell = afs_cell_lookup(args[0].from,
+ args[0].to - args[0].from);
+ if (IS_ERR(cell))
+ return PTR_ERR(cell);
+ afs_put_cell(params->cell);
+ params->cell = cell;
+ break;
+
+ case afs_opt_rwpath:
params->rwpath = 1;
- continue;
- }
- else if (strcmp(key, "vol") == 0) {
- if (!want_arg(&value, "vol"))
- return -EINVAL;
- *devname = value;
- continue;
+ break;
+
+ case afs_opt_vol:
+ *devname = args[0].from;
+ break;
+
+ default:
+ printk(KERN_ERR "kAFS:"
+ " Unknown or invalid mount option: '%s'\n", p);
+ return -EINVAL;
}
- else if (strcmp(key, "cell") == 0) {
- if (!want_arg(&value, "cell"))
- return -EINVAL;
- afs_put_cell(params->default_cell);
- ret = afs_cell_lookup(value,
- strlen(value),
- &params->default_cell);
- if (ret < 0)
- return -EINVAL;
- continue;
+ }
+
+ _leave(" = 0");
+ return 0;
+}
+
+/*
+ * parse a device name to get cell name, volume name, volume type and R/W
+ * selector
+ * - this can be one of the following:
+ * "%[cell:]volume[.]" R/W volume
+ * "#[cell:]volume[.]" R/O or R/W volume (rwpath=0),
+ * or R/W (rwpath=1) volume
+ * "%[cell:]volume.readonly" R/O volume
+ * "#[cell:]volume.readonly" R/O volume
+ * "%[cell:]volume.backup" Backup volume
+ * "#[cell:]volume.backup" Backup volume
+ */
+static int afs_parse_device_name(struct afs_mount_params *params,
+ const char *name)
+{
+ struct afs_cell *cell;
+ const char *cellname, *suffix;
+ int cellnamesz;
+
+ _enter(",%s", name);
+
+ if (!name) {
+ printk(KERN_ERR "kAFS: no volume name specified\n");
+ return -EINVAL;
+ }
+
+ if ((name[0] != '%' && name[0] != '#') || !name[1]) {
+ printk(KERN_ERR "kAFS: unparsable volume name\n");
+ return -EINVAL;
+ }
+
+ /* determine the type of volume we're looking for */
+ params->type = AFSVL_ROVOL;
+ params->force = false;
+ if (params->rwpath || name[0] == '%') {
+ params->type = AFSVL_RWVOL;
+ params->force = true;
+ }
+ name++;
+
+ /* split the cell name out if there is one */
+ params->volname = strchr(name, ':');
+ if (params->volname) {
+ cellname = name;
+ cellnamesz = params->volname - name;
+ params->volname++;
+ } else {
+ params->volname = name;
+ cellname = NULL;
+ cellnamesz = 0;
+ }
+
+ /* the volume type is further affected by a possible suffix */
+ suffix = strrchr(params->volname, '.');
+ if (suffix) {
+ if (strcmp(suffix, ".readonly") == 0) {
+ params->type = AFSVL_ROVOL;
+ params->force = true;
+ } else if (strcmp(suffix, ".backup") == 0) {
+ params->type = AFSVL_BACKVOL;
+ params->force = true;
+ } else if (suffix[1] == 0) {
+ } else {
+ suffix = NULL;
}
+ }
- printk("kAFS: Unknown mount option: '%s'\n", key);
- ret = -EINVAL;
- goto error;
+ params->volnamesz = suffix ?
+ suffix - params->volname : strlen(params->volname);
+
+ _debug("cell %*.*s [%p]",
+ cellnamesz, cellnamesz, cellname ?: "", params->cell);
+
+ /* lookup the cell record */
+ if (cellname || !params->cell) {
+ cell = afs_cell_lookup(cellname, cellnamesz);
+ if (IS_ERR(cell)) {
+ printk(KERN_ERR "kAFS: unable to lookup cell '%s'\n",
+ cellname ?: "");
+ return PTR_ERR(cell);
+ }
+ afs_put_cell(params->cell);
+ params->cell = cell;
}
- ret = 0;
+ _debug("CELL:%s [%p] VOLUME:%*.*s SUFFIX:%s TYPE:%d%s",
+ params->cell->name, params->cell,
+ params->volnamesz, params->volnamesz, params->volname,
+ suffix ?: "-", params->type, params->force ? " FORCE" : "");
- error:
- _leave(" = %d", ret);
- return ret;
-} /* end afs_super_parse_options() */
+ return 0;
+}
-/*****************************************************************************/
/*
* check a superblock to see if it's the one we're looking for
*/
@@ -224,13 +282,12 @@ static int afs_test_super(struct super_block *sb, void *data)
struct afs_super_info *as = sb->s_fs_info;
return as->volume == params->volume;
-} /* end afs_test_super() */
+}
-/*****************************************************************************/
/*
* fill in the superblock
*/
-static int afs_fill_super(struct super_block *sb, void *data, int silent)
+static int afs_fill_super(struct super_block *sb, void *data)
{
struct afs_mount_params *params = data;
struct afs_super_info *as = NULL;
@@ -239,7 +296,7 @@ static int afs_fill_super(struct super_block *sb, void *data, int silent)
struct inode *inode = NULL;
int ret;
- kenter("");
+ _enter("");
/* allocate a superblock info record */
as = kzalloc(sizeof(struct afs_super_info), GFP_KERNEL);
@@ -262,9 +319,9 @@ static int afs_fill_super(struct super_block *sb, void *data, int silent)
fid.vid = as->volume->vid;
fid.vnode = 1;
fid.unique = 1;
- ret = afs_iget(sb, &fid, &inode);
- if (ret < 0)
- goto error;
+ inode = afs_iget(sb, params->key, &fid, NULL, NULL);
+ if (IS_ERR(inode))
+ goto error_inode;
ret = -ENOMEM;
root = d_alloc_root(inode);
@@ -273,24 +330,25 @@ static int afs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_root = root;
- kleave(" = 0");
+ _leave(" = 0");
return 0;
- error:
+error_inode:
+ ret = PTR_ERR(inode);
+ inode = NULL;
+error:
iput(inode);
afs_put_volume(as->volume);
kfree(as);
sb->s_fs_info = NULL;
- kleave(" = %d", ret);
+ _leave(" = %d", ret);
return ret;
-} /* end afs_fill_super() */
+}
-/*****************************************************************************/
/*
* get an AFS superblock
- * - TODO: don't use get_sb_nodev(), but rather call sget() directly
*/
static int afs_get_sb(struct file_system_type *fs_type,
int flags,
@@ -300,69 +358,79 @@ static int afs_get_sb(struct file_system_type *fs_type,
{
struct afs_mount_params params;
struct super_block *sb;
+ struct afs_volume *vol;
+ struct key *key;
int ret;
_enter(",,%s,%p", dev_name, options);
memset(&params, 0, sizeof(params));
- /* start the cache manager */
- ret = afscm_start();
- if (ret < 0) {
- _leave(" = %d", ret);
- return ret;
- }
-
- /* parse the options */
+ /* parse the options and device name */
if (options) {
- ret = afs_super_parse_options(&params, options, &dev_name);
+ ret = afs_parse_options(&params, options, &dev_name);
if (ret < 0)
goto error;
- if (!dev_name) {
- printk("kAFS: no volume name specified\n");
- ret = -EINVAL;
- goto error;
- }
}
- /* parse the device name */
- ret = afs_volume_lookup(dev_name,
- params.default_cell,
- params.rwpath,
- &params.volume);
+ ret = afs_parse_device_name(&params, dev_name);
if (ret < 0)
goto error;
- /* allocate a deviceless superblock */
- sb = sget(fs_type, afs_test_super, set_anon_super, &params);
- if (IS_ERR(sb))
+ /* try and do the mount securely */
+ key = afs_request_key(params.cell);
+ if (IS_ERR(key)) {
+ _leave(" = %ld [key]", PTR_ERR(key));
+ ret = PTR_ERR(key);
goto error;
+ }
+ params.key = key;
- sb->s_flags = flags;
+ /* parse the device name */
+ vol = afs_volume_lookup(&params);
+ if (IS_ERR(vol)) {
+ ret = PTR_ERR(vol);
+ goto error;
+ }
+ params.volume = vol;
- ret = afs_fill_super(sb, &params, flags & MS_SILENT ? 1 : 0);
- if (ret < 0) {
- up_write(&sb->s_umount);
- deactivate_super(sb);
+ /* allocate a deviceless superblock */
+ sb = sget(fs_type, afs_test_super, set_anon_super, &params);
+ if (IS_ERR(sb)) {
+ ret = PTR_ERR(sb);
goto error;
}
- sb->s_flags |= MS_ACTIVE;
- simple_set_mnt(mnt, sb);
+ if (!sb->s_root) {
+ /* initial superblock/root creation */
+ _debug("create");
+ sb->s_flags = flags;
+ ret = afs_fill_super(sb, &params);
+ if (ret < 0) {
+ up_write(&sb->s_umount);
+ deactivate_super(sb);
+ goto error;
+ }
+ sb->s_flags |= MS_ACTIVE;
+ } else {
+ _debug("reuse");
+ ASSERTCMP(sb->s_flags, &, MS_ACTIVE);
+ }
+
+ simple_set_mnt(mnt, sb);
afs_put_volume(params.volume);
- afs_put_cell(params.default_cell);
- _leave(" = 0 [%p]", 0, sb);
+ afs_put_cell(params.cell);
+ _leave(" = 0 [%p]", sb);
return 0;
- error:
+error:
afs_put_volume(params.volume);
- afs_put_cell(params.default_cell);
- afscm_stop();
+ afs_put_cell(params.cell);
+ key_put(params.key);
_leave(" = %d", ret);
return ret;
-} /* end afs_get_sb() */
+}
-/*****************************************************************************/
/*
* finish the unmounting process on the superblock
*/
@@ -373,35 +441,30 @@ static void afs_put_super(struct super_block *sb)
_enter("");
afs_put_volume(as->volume);
- afscm_stop();
_leave("");
-} /* end afs_put_super() */
+}
-/*****************************************************************************/
/*
* initialise an inode cache slab element prior to any use
*/
static void afs_i_init_once(void *_vnode, struct kmem_cache *cachep,
unsigned long flags)
{
- struct afs_vnode *vnode = (struct afs_vnode *) _vnode;
+ struct afs_vnode *vnode = _vnode;
if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
SLAB_CTOR_CONSTRUCTOR) {
memset(vnode, 0, sizeof(*vnode));
inode_init_once(&vnode->vfs_inode);
init_waitqueue_head(&vnode->update_waitq);
+ mutex_init(&vnode->permits_lock);
+ mutex_init(&vnode->validate_lock);
spin_lock_init(&vnode->lock);
- INIT_LIST_HEAD(&vnode->cb_link);
- INIT_LIST_HEAD(&vnode->cb_hash_link);
- afs_timer_init(&vnode->cb_timeout,
- &afs_vnode_cb_timed_out_ops);
+ INIT_WORK(&vnode->cb_broken_work, afs_broken_callback_work);
}
+}
-} /* end afs_i_init_once() */
-
-/*****************************************************************************/
/*
* allocate an AFS inode struct from our slab cache
*/
@@ -409,8 +472,7 @@ static struct inode *afs_alloc_inode(struct super_block *sb)
{
struct afs_vnode *vnode;
- vnode = (struct afs_vnode *)
- kmem_cache_alloc(afs_inode_cachep, GFP_KERNEL);
+ vnode = kmem_cache_alloc(afs_inode_cachep, GFP_KERNEL);
if (!vnode)
return NULL;
@@ -421,21 +483,25 @@ static struct inode *afs_alloc_inode(struct super_block *sb)
vnode->volume = NULL;
vnode->update_cnt = 0;
- vnode->flags = 0;
+ vnode->flags = 1 << AFS_VNODE_UNSET;
+ vnode->cb_promised = false;
return &vnode->vfs_inode;
-} /* end afs_alloc_inode() */
+}
-/*****************************************************************************/
/*
* destroy an AFS inode struct
*/
static void afs_destroy_inode(struct inode *inode)
{
+ struct afs_vnode *vnode = AFS_FS_I(inode);
+
_enter("{%lu}", inode->i_ino);
- kmem_cache_free(afs_inode_cachep, AFS_FS_I(inode));
+ _debug("DESTROY INODE %p", inode);
- atomic_dec(&afs_count_active_inodes);
+ ASSERTCMP(vnode->server, ==, NULL);
-} /* end afs_destroy_inode() */
+ kmem_cache_free(afs_inode_cachep, vnode);
+ atomic_dec(&afs_count_active_inodes);
+}
diff --git a/fs/afs/super.h b/fs/afs/super.h
deleted file mode 100644
index 32de8cc6fae..00000000000
--- a/fs/afs/super.h
+++ /dev/null
@@ -1,45 +0,0 @@
-/* super.h: AFS filesystem internal private data
- *
- * Copyright (c) 2002 Red Hat, Inc. All rights reserved.
- *
- * This software may be freely redistributed under the terms of the
- * GNU General Public License.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * Authors: David Woodhouse <dwmw2@cambridge.redhat.com>
- * David Howells <dhowells@redhat.com>
- *
- */
-
-#ifndef _LINUX_AFS_SUPER_H
-#define _LINUX_AFS_SUPER_H
-
-#include <linux/fs.h>
-#include "server.h"
-
-#ifdef __KERNEL__
-
-/*****************************************************************************/
-/*
- * AFS superblock private data
- * - there's one superblock per volume
- */
-struct afs_super_info
-{
- struct afs_volume *volume; /* volume record */
- char rwparent; /* T if parent is R/W AFS volume */
-};
-
-static inline struct afs_super_info *AFS_FS_S(struct super_block *sb)
-{
- return sb->s_fs_info;
-}
-
-extern struct file_system_type afs_fs_type;
-
-#endif /* __KERNEL__ */
-
-#endif /* _LINUX_AFS_SUPER_H */
diff --git a/fs/afs/transport.h b/fs/afs/transport.h
deleted file mode 100644
index 7013ae6ccc8..00000000000
--- a/fs/afs/transport.h
+++ /dev/null
@@ -1,21 +0,0 @@
-/* transport.h: AFS transport management
- *
- * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#ifndef _LINUX_AFS_TRANSPORT_H
-#define _LINUX_AFS_TRANSPORT_H
-
-#include "types.h"
-#include <rxrpc/transport.h>
-
-/* the cache manager transport endpoint */
-extern struct rxrpc_transport *afs_transport;
-
-#endif /* _LINUX_AFS_TRANSPORT_H */
diff --git a/fs/afs/types.h b/fs/afs/types.h
deleted file mode 100644
index b1a2367c758..00000000000
--- a/fs/afs/types.h
+++ /dev/null
@@ -1,125 +0,0 @@
-/* types.h: AFS types
- *
- * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#ifndef _LINUX_AFS_TYPES_H
-#define _LINUX_AFS_TYPES_H
-
-#ifdef __KERNEL__
-#include <rxrpc/types.h>
-#endif /* __KERNEL__ */
-
-typedef unsigned afs_volid_t;
-typedef unsigned afs_vnodeid_t;
-typedef unsigned long long afs_dataversion_t;
-
-typedef enum {
- AFSVL_RWVOL, /* read/write volume */
- AFSVL_ROVOL, /* read-only volume */
- AFSVL_BACKVOL, /* backup volume */
-} __attribute__((packed)) afs_voltype_t;
-
-typedef enum {
- AFS_FTYPE_INVALID = 0,
- AFS_FTYPE_FILE = 1,
- AFS_FTYPE_DIR = 2,
- AFS_FTYPE_SYMLINK = 3,
-} afs_file_type_t;
-
-#ifdef __KERNEL__
-
-struct afs_cell;
-struct afs_vnode;
-
-/*****************************************************************************/
-/*
- * AFS file identifier
- */
-struct afs_fid
-{
- afs_volid_t vid; /* volume ID */
- afs_vnodeid_t vnode; /* file index within volume */
- unsigned unique; /* unique ID number (file index version) */
-};
-
-/*****************************************************************************/
-/*
- * AFS callback notification
- */
-typedef enum {
- AFSCM_CB_UNTYPED = 0, /* no type set on CB break */
- AFSCM_CB_EXCLUSIVE = 1, /* CB exclusive to CM [not implemented] */
- AFSCM_CB_SHARED = 2, /* CB shared by other CM's */
- AFSCM_CB_DROPPED = 3, /* CB promise cancelled by file server */
-} afs_callback_type_t;
-
-struct afs_callback
-{
- struct afs_server *server; /* server that made the promise */
- struct afs_fid fid; /* file identifier */
- unsigned version; /* callback version */
- unsigned expiry; /* time at which expires */
- afs_callback_type_t type; /* type of callback */
-};
-
-#define AFSCBMAX 50
-
-/*****************************************************************************/
-/*
- * AFS volume information
- */
-struct afs_volume_info
-{
- afs_volid_t vid; /* volume ID */
- afs_voltype_t type; /* type of this volume */
- afs_volid_t type_vids[5]; /* volume ID's for possible types for this vol */
-
- /* list of fileservers serving this volume */
- size_t nservers; /* number of entries used in servers[] */
- struct {
- struct in_addr addr; /* fileserver address */
- } servers[8];
-};
-
-/*****************************************************************************/
-/*
- * AFS file status information
- */
-struct afs_file_status
-{
- unsigned if_version; /* interface version */
-#define AFS_FSTATUS_VERSION 1
-
- afs_file_type_t type; /* file type */
- unsigned nlink; /* link count */
- size_t size; /* file size */
- afs_dataversion_t version; /* current data version */
- unsigned author; /* author ID */
- unsigned owner; /* owner ID */
- unsigned caller_access; /* access rights for authenticated caller */
- unsigned anon_access; /* access rights for unauthenticated caller */
- umode_t mode; /* UNIX mode */
- struct afs_fid parent; /* parent file ID */
- time_t mtime_client; /* last time client changed data */
- time_t mtime_server; /* last time server changed data */
-};
-
-/*****************************************************************************/
-/*
- * AFS volume synchronisation information
- */
-struct afs_volsync
-{
- time_t creation; /* volume creation time */
-};
-
-#endif /* __KERNEL__ */
-
-#endif /* _LINUX_AFS_TYPES_H */
diff --git a/fs/afs/vlclient.c b/fs/afs/vlclient.c
index 7b0e3192ee3..36c1306e09e 100644
--- a/fs/afs/vlclient.c
+++ b/fs/afs/vlclient.c
@@ -1,4 +1,4 @@
-/* vlclient.c: AFS Volume Location Service client
+/* AFS Volume Location Service client
*
* Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
@@ -11,247 +11,76 @@
#include <linux/init.h>
#include <linux/sched.h>
-#include <rxrpc/rxrpc.h>
-#include <rxrpc/transport.h>
-#include <rxrpc/connection.h>
-#include <rxrpc/call.h>
-#include "server.h"
-#include "volume.h"
-#include "vlclient.h"
-#include "kafsasyncd.h"
-#include "kafstimod.h"
-#include "errors.h"
#include "internal.h"
-#define VLGETENTRYBYID 503 /* AFS Get Cache Entry By ID operation ID */
-#define VLGETENTRYBYNAME 504 /* AFS Get Cache Entry By Name operation ID */
-#define VLPROBE 514 /* AFS Probe Volume Location Service operation ID */
-
-static void afs_rxvl_get_entry_by_id_attn(struct rxrpc_call *call);
-static void afs_rxvl_get_entry_by_id_error(struct rxrpc_call *call);
-
-/*****************************************************************************/
/*
- * map afs VL abort codes to/from Linux error codes
- * - called with call->lock held
+ * map volume locator abort codes to error codes
*/
-static void afs_rxvl_aemap(struct rxrpc_call *call)
+static int afs_vl_abort_to_error(u32 abort_code)
{
- int err;
-
- _enter("{%u,%u,%d}",
- call->app_err_state, call->app_abort_code, call->app_errno);
-
- switch (call->app_err_state) {
- case RXRPC_ESTATE_LOCAL_ABORT:
- call->app_abort_code = -call->app_errno;
- return;
-
- case RXRPC_ESTATE_PEER_ABORT:
- switch (call->app_abort_code) {
- case AFSVL_IDEXIST: err = -EEXIST; break;
- case AFSVL_IO: err = -EREMOTEIO; break;
- case AFSVL_NAMEEXIST: err = -EEXIST; break;
- case AFSVL_CREATEFAIL: err = -EREMOTEIO; break;
- case AFSVL_NOENT: err = -ENOMEDIUM; break;
- case AFSVL_EMPTY: err = -ENOMEDIUM; break;
- case AFSVL_ENTDELETED: err = -ENOMEDIUM; break;
- case AFSVL_BADNAME: err = -EINVAL; break;
- case AFSVL_BADINDEX: err = -EINVAL; break;
- case AFSVL_BADVOLTYPE: err = -EINVAL; break;
- case AFSVL_BADSERVER: err = -EINVAL; break;
- case AFSVL_BADPARTITION: err = -EINVAL; break;
- case AFSVL_REPSFULL: err = -EFBIG; break;
- case AFSVL_NOREPSERVER: err = -ENOENT; break;
- case AFSVL_DUPREPSERVER: err = -EEXIST; break;
- case AFSVL_RWNOTFOUND: err = -ENOENT; break;
- case AFSVL_BADREFCOUNT: err = -EINVAL; break;
- case AFSVL_SIZEEXCEEDED: err = -EINVAL; break;
- case AFSVL_BADENTRY: err = -EINVAL; break;
- case AFSVL_BADVOLIDBUMP: err = -EINVAL; break;
- case AFSVL_IDALREADYHASHED: err = -EINVAL; break;
- case AFSVL_ENTRYLOCKED: err = -EBUSY; break;
- case AFSVL_BADVOLOPER: err = -EBADRQC; break;
- case AFSVL_BADRELLOCKTYPE: err = -EINVAL; break;
- case AFSVL_RERELEASE: err = -EREMOTEIO; break;
- case AFSVL_BADSERVERFLAG: err = -EINVAL; break;
- case AFSVL_PERM: err = -EACCES; break;
- case AFSVL_NOMEM: err = -EREMOTEIO; break;
- default:
- err = afs_abort_to_error(call->app_abort_code);
- break;
- }
- call->app_errno = err;
- return;
-
+ _enter("%u", abort_code);
+
+ switch (abort_code) {
+ case AFSVL_IDEXIST: return -EEXIST;
+ case AFSVL_IO: return -EREMOTEIO;
+ case AFSVL_NAMEEXIST: return -EEXIST;
+ case AFSVL_CREATEFAIL: return -EREMOTEIO;
+ case AFSVL_NOENT: return -ENOMEDIUM;
+ case AFSVL_EMPTY: return -ENOMEDIUM;
+ case AFSVL_ENTDELETED: return -ENOMEDIUM;
+ case AFSVL_BADNAME: return -EINVAL;
+ case AFSVL_BADINDEX: return -EINVAL;
+ case AFSVL_BADVOLTYPE: return -EINVAL;
+ case AFSVL_BADSERVER: return -EINVAL;
+ case AFSVL_BADPARTITION: return -EINVAL;
+ case AFSVL_REPSFULL: return -EFBIG;
+ case AFSVL_NOREPSERVER: return -ENOENT;
+ case AFSVL_DUPREPSERVER: return -EEXIST;
+ case AFSVL_RWNOTFOUND: return -ENOENT;
+ case AFSVL_BADREFCOUNT: return -EINVAL;
+ case AFSVL_SIZEEXCEEDED: return -EINVAL;
+ case AFSVL_BADENTRY: return -EINVAL;
+ case AFSVL_BADVOLIDBUMP: return -EINVAL;
+ case AFSVL_IDALREADYHASHED: return -EINVAL;
+ case AFSVL_ENTRYLOCKED: return -EBUSY;
+ case AFSVL_BADVOLOPER: return -EBADRQC;
+ case AFSVL_BADRELLOCKTYPE: return -EINVAL;
+ case AFSVL_RERELEASE: return -EREMOTEIO;
+ case AFSVL_BADSERVERFLAG: return -EINVAL;
+ case AFSVL_PERM: return -EACCES;
+ case AFSVL_NOMEM: return -EREMOTEIO;
default:
- return;
+ return afs_abort_to_error(abort_code);
}
-} /* end afs_rxvl_aemap() */
+}
-#if 0
-/*****************************************************************************/
/*
- * probe a volume location server to see if it is still alive -- unused
+ * deliver reply data to a VL.GetEntryByXXX call
*/
-static int afs_rxvl_probe(struct afs_server *server, int alloc_flags)
+static int afs_deliver_vl_get_entry_by_xxx(struct afs_call *call,
+ struct sk_buff *skb, bool last)
{
- struct rxrpc_connection *conn;
- struct rxrpc_call *call;
- struct kvec piov[1];
- size_t sent;
- int ret;
- __be32 param[1];
-
- DECLARE_WAITQUEUE(myself, current);
-
- /* get hold of the vlserver connection */
- ret = afs_server_get_vlconn(server, &conn);
- if (ret < 0)
- goto out;
-
- /* create a call through that connection */
- ret = rxrpc_create_call(conn, NULL, NULL, afs_rxvl_aemap, &call);
- if (ret < 0) {
- printk("kAFS: Unable to create call: %d\n", ret);
- goto out_put_conn;
- }
- call->app_opcode = VLPROBE;
-
- /* we want to get event notifications from the call */
- add_wait_queue(&call->waitq, &myself);
-
- /* marshall the parameters */
- param[0] = htonl(VLPROBE);
- piov[0].iov_len = sizeof(param);
- piov[0].iov_base = param;
-
- /* send the parameters to the server */
- ret = rxrpc_call_write_data(call, 1, piov, RXRPC_LAST_PACKET,
- alloc_flags, 0, &sent);
- if (ret < 0)
- goto abort;
-
- /* wait for the reply to completely arrive */
- for (;;) {
- set_current_state(TASK_INTERRUPTIBLE);
- if (call->app_call_state != RXRPC_CSTATE_CLNT_RCV_REPLY ||
- signal_pending(current))
- break;
- schedule();
- }
- set_current_state(TASK_RUNNING);
-
- ret = -EINTR;
- if (signal_pending(current))
- goto abort;
-
- switch (call->app_call_state) {
- case RXRPC_CSTATE_ERROR:
- ret = call->app_errno;
- goto out_unwait;
-
- case RXRPC_CSTATE_CLNT_GOT_REPLY:
- ret = 0;
- goto out_unwait;
-
- default:
- BUG();
- }
-
- abort:
- set_current_state(TASK_UNINTERRUPTIBLE);
- rxrpc_call_abort(call, ret);
- schedule();
-
- out_unwait:
- set_current_state(TASK_RUNNING);
- remove_wait_queue(&call->waitq, &myself);
- rxrpc_put_call(call);
- out_put_conn:
- rxrpc_put_connection(conn);
- out:
- return ret;
+ struct afs_cache_vlocation *entry;
+ __be32 *bp;
+ u32 tmp;
+ int loop;
-} /* end afs_rxvl_probe() */
-#endif
+ _enter(",,%u", last);
-/*****************************************************************************/
-/*
- * look up a volume location database entry by name
- */
-int afs_rxvl_get_entry_by_name(struct afs_server *server,
- const char *volname,
- unsigned volnamesz,
- struct afs_cache_vlocation *entry)
-{
- DECLARE_WAITQUEUE(myself, current);
-
- struct rxrpc_connection *conn;
- struct rxrpc_call *call;
- struct kvec piov[3];
- unsigned tmp;
- size_t sent;
- int ret, loop;
- __be32 *bp, param[2], zero;
-
- _enter(",%*.*s,%u,", volnamesz, volnamesz, volname, volnamesz);
-
- memset(entry, 0, sizeof(*entry));
-
- /* get hold of the vlserver connection */
- ret = afs_server_get_vlconn(server, &conn);
- if (ret < 0)
- goto out;
-
- /* create a call through that connection */
- ret = rxrpc_create_call(conn, NULL, NULL, afs_rxvl_aemap, &call);
- if (ret < 0) {
- printk("kAFS: Unable to create call: %d\n", ret);
- goto out_put_conn;
- }
- call->app_opcode = VLGETENTRYBYNAME;
+ afs_transfer_reply(call, skb);
+ if (!last)
+ return 0;
- /* we want to get event notifications from the call */
- add_wait_queue(&call->waitq, &myself);
+ if (call->reply_size != call->reply_max)
+ return -EBADMSG;
- /* marshall the parameters */
- piov[1].iov_len = volnamesz;
- piov[1].iov_base = (char *) volname;
-
- zero = 0;
- piov[2].iov_len = (4 - (piov[1].iov_len & 3)) & 3;
- piov[2].iov_base = &zero;
-
- param[0] = htonl(VLGETENTRYBYNAME);
- param[1] = htonl(piov[1].iov_len);
-
- piov[0].iov_len = sizeof(param);
- piov[0].iov_base = param;
-
- /* send the parameters to the server */
- ret = rxrpc_call_write_data(call, 3, piov, RXRPC_LAST_PACKET, GFP_NOFS,
- 0, &sent);
- if (ret < 0)
- goto abort;
-
- /* wait for the reply to completely arrive */
- bp = rxrpc_call_alloc_scratch(call, 384);
-
- ret = rxrpc_call_read_data(call, bp, 384,
- RXRPC_CALL_READ_BLOCK |
- RXRPC_CALL_READ_ALL);
- if (ret < 0) {
- if (ret == -ECONNABORTED) {
- ret = call->app_errno;
- goto out_unwait;
- }
- goto abort;
- }
+ /* unmarshall the reply once we've received all of it */
+ entry = call->reply;
+ bp = call->buffer;
- /* unmarshall the reply */
for (loop = 0; loop < 64; loop++)
entry->name[loop] = ntohl(*bp++);
+ entry->name[loop] = 0;
bp++; /* final NUL */
bp++; /* type */
@@ -264,6 +93,7 @@ int afs_rxvl_get_entry_by_name(struct afs_server *server,
for (loop = 0; loop < 8; loop++) {
tmp = ntohl(*bp++);
+ entry->srvtmask[loop] = 0;
if (tmp & AFS_VLSF_RWVOL)
entry->srvtmask[loop] |= AFS_VOL_VTM_RW;
if (tmp & AFS_VLSF_ROVOL)
@@ -279,417 +109,110 @@ int afs_rxvl_get_entry_by_name(struct afs_server *server,
bp++; /* clone ID */
tmp = ntohl(*bp++); /* flags */
+ entry->vidmask = 0;
if (tmp & AFS_VLF_RWEXISTS)
entry->vidmask |= AFS_VOL_VTM_RW;
if (tmp & AFS_VLF_ROEXISTS)
entry->vidmask |= AFS_VOL_VTM_RO;
if (tmp & AFS_VLF_BACKEXISTS)
entry->vidmask |= AFS_VOL_VTM_BAK;
-
- ret = -ENOMEDIUM;
if (!entry->vidmask)
- goto abort;
-
- /* success */
- entry->rtime = get_seconds();
- ret = 0;
-
- out_unwait:
- set_current_state(TASK_RUNNING);
- remove_wait_queue(&call->waitq, &myself);
- rxrpc_put_call(call);
- out_put_conn:
- rxrpc_put_connection(conn);
- out:
- _leave(" = %d", ret);
- return ret;
-
- abort:
- set_current_state(TASK_UNINTERRUPTIBLE);
- rxrpc_call_abort(call, ret);
- schedule();
- goto out_unwait;
-} /* end afs_rxvl_get_entry_by_name() */
-
-/*****************************************************************************/
-/*
- * look up a volume location database entry by ID
- */
-int afs_rxvl_get_entry_by_id(struct afs_server *server,
- afs_volid_t volid,
- afs_voltype_t voltype,
- struct afs_cache_vlocation *entry)
-{
- DECLARE_WAITQUEUE(myself, current);
-
- struct rxrpc_connection *conn;
- struct rxrpc_call *call;
- struct kvec piov[1];
- unsigned tmp;
- size_t sent;
- int ret, loop;
- __be32 *bp, param[3];
-
- _enter(",%x,%d,", volid, voltype);
-
- memset(entry, 0, sizeof(*entry));
-
- /* get hold of the vlserver connection */
- ret = afs_server_get_vlconn(server, &conn);
- if (ret < 0)
- goto out;
-
- /* create a call through that connection */
- ret = rxrpc_create_call(conn, NULL, NULL, afs_rxvl_aemap, &call);
- if (ret < 0) {
- printk("kAFS: Unable to create call: %d\n", ret);
- goto out_put_conn;
- }
- call->app_opcode = VLGETENTRYBYID;
-
- /* we want to get event notifications from the call */
- add_wait_queue(&call->waitq, &myself);
-
- /* marshall the parameters */
- param[0] = htonl(VLGETENTRYBYID);
- param[1] = htonl(volid);
- param[2] = htonl(voltype);
-
- piov[0].iov_len = sizeof(param);
- piov[0].iov_base = param;
-
- /* send the parameters to the server */
- ret = rxrpc_call_write_data(call, 1, piov, RXRPC_LAST_PACKET, GFP_NOFS,
- 0, &sent);
- if (ret < 0)
- goto abort;
-
- /* wait for the reply to completely arrive */
- bp = rxrpc_call_alloc_scratch(call, 384);
-
- ret = rxrpc_call_read_data(call, bp, 384,
- RXRPC_CALL_READ_BLOCK |
- RXRPC_CALL_READ_ALL);
- if (ret < 0) {
- if (ret == -ECONNABORTED) {
- ret = call->app_errno;
- goto out_unwait;
- }
- goto abort;
- }
-
- /* unmarshall the reply */
- for (loop = 0; loop < 64; loop++)
- entry->name[loop] = ntohl(*bp++);
- bp++; /* final NUL */
+ return -EBADMSG;
- bp++; /* type */
- entry->nservers = ntohl(*bp++);
-
- for (loop = 0; loop < 8; loop++)
- entry->servers[loop].s_addr = *bp++;
-
- bp += 8; /* partition IDs */
+ _leave(" = 0 [done]");
+ return 0;
+}
- for (loop = 0; loop < 8; loop++) {
- tmp = ntohl(*bp++);
- if (tmp & AFS_VLSF_RWVOL)
- entry->srvtmask[loop] |= AFS_VOL_VTM_RW;
- if (tmp & AFS_VLSF_ROVOL)
- entry->srvtmask[loop] |= AFS_VOL_VTM_RO;
- if (tmp & AFS_VLSF_BACKVOL)
- entry->srvtmask[loop] |= AFS_VOL_VTM_BAK;
- }
-
- entry->vid[0] = ntohl(*bp++);
- entry->vid[1] = ntohl(*bp++);
- entry->vid[2] = ntohl(*bp++);
-
- bp++; /* clone ID */
-
- tmp = ntohl(*bp++); /* flags */
- if (tmp & AFS_VLF_RWEXISTS)
- entry->vidmask |= AFS_VOL_VTM_RW;
- if (tmp & AFS_VLF_ROEXISTS)
- entry->vidmask |= AFS_VOL_VTM_RO;
- if (tmp & AFS_VLF_BACKEXISTS)
- entry->vidmask |= AFS_VOL_VTM_BAK;
-
- ret = -ENOMEDIUM;
- if (!entry->vidmask)
- goto abort;
-
-#if 0 /* TODO: remove */
- entry->nservers = 3;
- entry->servers[0].s_addr = htonl(0xac101249);
- entry->servers[1].s_addr = htonl(0xac101243);
- entry->servers[2].s_addr = htonl(0xac10125b /*0xac10125b*/);
-
- entry->srvtmask[0] = AFS_VOL_VTM_RO;
- entry->srvtmask[1] = AFS_VOL_VTM_RO;
- entry->srvtmask[2] = AFS_VOL_VTM_RO | AFS_VOL_VTM_RW;
-#endif
-
- /* success */
- entry->rtime = get_seconds();
- ret = 0;
-
- out_unwait:
- set_current_state(TASK_RUNNING);
- remove_wait_queue(&call->waitq, &myself);
- rxrpc_put_call(call);
- out_put_conn:
- rxrpc_put_connection(conn);
- out:
- _leave(" = %d", ret);
- return ret;
-
- abort:
- set_current_state(TASK_UNINTERRUPTIBLE);
- rxrpc_call_abort(call, ret);
- schedule();
- goto out_unwait;
-} /* end afs_rxvl_get_entry_by_id() */
-
-/*****************************************************************************/
/*
- * look up a volume location database entry by ID asynchronously
+ * VL.GetEntryByName operation type
*/
-int afs_rxvl_get_entry_by_id_async(struct afs_async_op *op,
- afs_volid_t volid,
- afs_voltype_t voltype)
-{
- struct rxrpc_connection *conn;
- struct rxrpc_call *call;
- struct kvec piov[1];
- size_t sent;
- int ret;
- __be32 param[3];
-
- _enter(",%x,%d,", volid, voltype);
-
- /* get hold of the vlserver connection */
- ret = afs_server_get_vlconn(op->server, &conn);
- if (ret < 0) {
- _leave(" = %d", ret);
- return ret;
- }
-
- /* create a call through that connection */
- ret = rxrpc_create_call(conn,
- afs_rxvl_get_entry_by_id_attn,
- afs_rxvl_get_entry_by_id_error,
- afs_rxvl_aemap,
- &op->call);
- rxrpc_put_connection(conn);
-
- if (ret < 0) {
- printk("kAFS: Unable to create call: %d\n", ret);
- _leave(" = %d", ret);
- return ret;
- }
+static const struct afs_call_type afs_RXVLGetEntryByName = {
+ .name = "VL.GetEntryByName",
+ .deliver = afs_deliver_vl_get_entry_by_xxx,
+ .abort_to_error = afs_vl_abort_to_error,
+ .destructor = afs_flat_call_destructor,
+};
- op->call->app_opcode = VLGETENTRYBYID;
- op->call->app_user = op;
-
- call = op->call;
- rxrpc_get_call(call);
-
- /* send event notifications from the call to kafsasyncd */
- afs_kafsasyncd_begin_op(op);
-
- /* marshall the parameters */
- param[0] = htonl(VLGETENTRYBYID);
- param[1] = htonl(volid);
- param[2] = htonl(voltype);
-
- piov[0].iov_len = sizeof(param);
- piov[0].iov_base = param;
-
- /* allocate result read buffer in scratch space */
- call->app_scr_ptr = rxrpc_call_alloc_scratch(op->call, 384);
-
- /* send the parameters to the server */
- ret = rxrpc_call_write_data(call, 1, piov, RXRPC_LAST_PACKET, GFP_NOFS,
- 0, &sent);
- if (ret < 0) {
- rxrpc_call_abort(call, ret); /* handle from kafsasyncd */
- ret = 0;
- goto out;
- }
-
- /* wait for the reply to completely arrive */
- ret = rxrpc_call_read_data(call, call->app_scr_ptr, 384, 0);
- switch (ret) {
- case 0:
- case -EAGAIN:
- case -ECONNABORTED:
- ret = 0;
- break; /* all handled by kafsasyncd */
-
- default:
- rxrpc_call_abort(call, ret); /* make kafsasyncd handle it */
- ret = 0;
- break;
- }
-
- out:
- rxrpc_put_call(call);
- _leave(" = %d", ret);
- return ret;
-
-} /* end afs_rxvl_get_entry_by_id_async() */
+/*
+ * VL.GetEntryById operation type
+ */
+static const struct afs_call_type afs_RXVLGetEntryById = {
+ .name = "VL.GetEntryById",
+ .deliver = afs_deliver_vl_get_entry_by_xxx,
+ .abort_to_error = afs_vl_abort_to_error,
+ .destructor = afs_flat_call_destructor,
+};
-/*****************************************************************************/
/*
- * attend to the asynchronous get VLDB entry by ID
+ * dispatch a get volume entry by name operation
*/
-int afs_rxvl_get_entry_by_id_async2(struct afs_async_op *op,
- struct afs_cache_vlocation *entry)
+int afs_vl_get_entry_by_name(struct in_addr *addr,
+ struct key *key,
+ const char *volname,
+ struct afs_cache_vlocation *entry,
+ const struct afs_wait_mode *wait_mode)
{
+ struct afs_call *call;
+ size_t volnamesz, reqsz, padsz;
__be32 *bp;
- __u32 tmp;
- int loop, ret;
-
- _enter("{op=%p cst=%u}", op, op->call->app_call_state);
-
- memset(entry, 0, sizeof(*entry));
-
- if (op->call->app_call_state == RXRPC_CSTATE_COMPLETE) {
- /* operation finished */
- afs_kafsasyncd_terminate_op(op);
-
- bp = op->call->app_scr_ptr;
-
- /* unmarshall the reply */
- for (loop = 0; loop < 64; loop++)
- entry->name[loop] = ntohl(*bp++);
- bp++; /* final NUL */
-
- bp++; /* type */
- entry->nservers = ntohl(*bp++);
-
- for (loop = 0; loop < 8; loop++)
- entry->servers[loop].s_addr = *bp++;
-
- bp += 8; /* partition IDs */
-
- for (loop = 0; loop < 8; loop++) {
- tmp = ntohl(*bp++);
- if (tmp & AFS_VLSF_RWVOL)
- entry->srvtmask[loop] |= AFS_VOL_VTM_RW;
- if (tmp & AFS_VLSF_ROVOL)
- entry->srvtmask[loop] |= AFS_VOL_VTM_RO;
- if (tmp & AFS_VLSF_BACKVOL)
- entry->srvtmask[loop] |= AFS_VOL_VTM_BAK;
- }
-
- entry->vid[0] = ntohl(*bp++);
- entry->vid[1] = ntohl(*bp++);
- entry->vid[2] = ntohl(*bp++);
-
- bp++; /* clone ID */
-
- tmp = ntohl(*bp++); /* flags */
- if (tmp & AFS_VLF_RWEXISTS)
- entry->vidmask |= AFS_VOL_VTM_RW;
- if (tmp & AFS_VLF_ROEXISTS)
- entry->vidmask |= AFS_VOL_VTM_RO;
- if (tmp & AFS_VLF_BACKEXISTS)
- entry->vidmask |= AFS_VOL_VTM_BAK;
-
- ret = -ENOMEDIUM;
- if (!entry->vidmask) {
- rxrpc_call_abort(op->call, ret);
- goto done;
- }
-
-#if 0 /* TODO: remove */
- entry->nservers = 3;
- entry->servers[0].s_addr = htonl(0xac101249);
- entry->servers[1].s_addr = htonl(0xac101243);
- entry->servers[2].s_addr = htonl(0xac10125b /*0xac10125b*/);
-
- entry->srvtmask[0] = AFS_VOL_VTM_RO;
- entry->srvtmask[1] = AFS_VOL_VTM_RO;
- entry->srvtmask[2] = AFS_VOL_VTM_RO | AFS_VOL_VTM_RW;
-#endif
-
- /* success */
- entry->rtime = get_seconds();
- ret = 0;
- goto done;
- }
- if (op->call->app_call_state == RXRPC_CSTATE_ERROR) {
- /* operation error */
- ret = op->call->app_errno;
- goto done;
- }
+ _enter("");
- _leave(" = -EAGAIN");
- return -EAGAIN;
+ volnamesz = strlen(volname);
+ padsz = (4 - (volnamesz & 3)) & 3;
+ reqsz = 8 + volnamesz + padsz;
- done:
- rxrpc_put_call(op->call);
- op->call = NULL;
- _leave(" = %d", ret);
- return ret;
-} /* end afs_rxvl_get_entry_by_id_async2() */
+ call = afs_alloc_flat_call(&afs_RXVLGetEntryByName, reqsz, 384);
+ if (!call)
+ return -ENOMEM;
-/*****************************************************************************/
-/*
- * handle attention events on an async get-entry-by-ID op
- * - called from krxiod
- */
-static void afs_rxvl_get_entry_by_id_attn(struct rxrpc_call *call)
-{
- struct afs_async_op *op = call->app_user;
-
- _enter("{op=%p cst=%u}", op, call->app_call_state);
-
- switch (call->app_call_state) {
- case RXRPC_CSTATE_COMPLETE:
- afs_kafsasyncd_attend_op(op);
- break;
- case RXRPC_CSTATE_CLNT_RCV_REPLY:
- if (call->app_async_read)
- break;
- case RXRPC_CSTATE_CLNT_GOT_REPLY:
- if (call->app_read_count == 0)
- break;
- printk("kAFS: Reply bigger than expected"
- " {cst=%u asyn=%d mark=%Zu rdy=%Zu pr=%u%s}",
- call->app_call_state,
- call->app_async_read,
- call->app_mark,
- call->app_ready_qty,
- call->pkt_rcv_count,
- call->app_last_rcv ? " last" : "");
-
- rxrpc_call_abort(call, -EBADMSG);
- break;
- default:
- BUG();
- }
+ call->key = key;
+ call->reply = entry;
+ call->service_id = VL_SERVICE;
+ call->port = htons(AFS_VL_PORT);
- _leave("");
+ /* marshall the parameters */
+ bp = call->request;
+ *bp++ = htonl(VLGETENTRYBYNAME);
+ *bp++ = htonl(volnamesz);
+ memcpy(bp, volname, volnamesz);
+ if (padsz > 0)
+ memset((void *) bp + volnamesz, 0, padsz);
-} /* end afs_rxvl_get_entry_by_id_attn() */
+ /* initiate the call */
+ return afs_make_call(addr, call, GFP_KERNEL, wait_mode);
+}
-/*****************************************************************************/
/*
- * handle error events on an async get-entry-by-ID op
- * - called from krxiod
+ * dispatch a get volume entry by ID operation
*/
-static void afs_rxvl_get_entry_by_id_error(struct rxrpc_call *call)
+int afs_vl_get_entry_by_id(struct in_addr *addr,
+ struct key *key,
+ afs_volid_t volid,
+ afs_voltype_t voltype,
+ struct afs_cache_vlocation *entry,
+ const struct afs_wait_mode *wait_mode)
{
- struct afs_async_op *op = call->app_user;
+ struct afs_call *call;
+ __be32 *bp;
- _enter("{op=%p cst=%u}", op, call->app_call_state);
+ _enter("");
- afs_kafsasyncd_attend_op(op);
+ call = afs_alloc_flat_call(&afs_RXVLGetEntryById, 12, 384);
+ if (!call)
+ return -ENOMEM;
- _leave("");
+ call->key = key;
+ call->reply = entry;
+ call->service_id = VL_SERVICE;
+ call->port = htons(AFS_VL_PORT);
-} /* end afs_rxvl_get_entry_by_id_error() */
+ /* marshall the parameters */
+ bp = call->request;
+ *bp++ = htonl(VLGETENTRYBYID);
+ *bp++ = htonl(volid);
+ *bp = htonl(voltype);
+
+ /* initiate the call */
+ return afs_make_call(addr, call, GFP_KERNEL, wait_mode);
+}
diff --git a/fs/afs/vlocation.c b/fs/afs/vlocation.c
index 782ee7c600c..3370cdb7256 100644
--- a/fs/afs/vlocation.c
+++ b/fs/afs/vlocation.c
@@ -1,6 +1,6 @@
-/* vlocation.c: volume location management
+/* AFS volume location management
*
- * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
+ * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
@@ -12,131 +12,61 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/fs.h>
-#include <linux/pagemap.h>
-#include "volume.h"
-#include "cell.h"
-#include "cmservice.h"
-#include "fsclient.h"
-#include "vlclient.h"
-#include "kafstimod.h"
-#include <rxrpc/connection.h>
#include "internal.h"
-#define AFS_VLDB_TIMEOUT HZ*1000
+unsigned afs_vlocation_timeout = 10; /* volume location timeout in seconds */
+unsigned afs_vlocation_update_timeout = 10 * 60;
-static void afs_vlocation_update_timer(struct afs_timer *timer);
-static void afs_vlocation_update_attend(struct afs_async_op *op);
-static void afs_vlocation_update_discard(struct afs_async_op *op);
-static void __afs_put_vlocation(struct afs_vlocation *vlocation);
+static void afs_vlocation_reaper(struct work_struct *);
+static void afs_vlocation_updater(struct work_struct *);
-static void __afs_vlocation_timeout(struct afs_timer *timer)
-{
- struct afs_vlocation *vlocation =
- list_entry(timer, struct afs_vlocation, timeout);
-
- _debug("VL TIMEOUT [%s{u=%d}]",
- vlocation->vldb.name, atomic_read(&vlocation->usage));
-
- afs_vlocation_do_timeout(vlocation);
-}
-
-static const struct afs_timer_ops afs_vlocation_timer_ops = {
- .timed_out = __afs_vlocation_timeout,
-};
+static LIST_HEAD(afs_vlocation_updates);
+static LIST_HEAD(afs_vlocation_graveyard);
+static DEFINE_SPINLOCK(afs_vlocation_updates_lock);
+static DEFINE_SPINLOCK(afs_vlocation_graveyard_lock);
+static DECLARE_DELAYED_WORK(afs_vlocation_reap, afs_vlocation_reaper);
+static DECLARE_DELAYED_WORK(afs_vlocation_update, afs_vlocation_updater);
+static struct workqueue_struct *afs_vlocation_update_worker;
-static const struct afs_timer_ops afs_vlocation_update_timer_ops = {
- .timed_out = afs_vlocation_update_timer,
-};
-
-static const struct afs_async_op_ops afs_vlocation_update_op_ops = {
- .attend = afs_vlocation_update_attend,
- .discard = afs_vlocation_update_discard,
-};
-
-static LIST_HEAD(afs_vlocation_update_pendq); /* queue of VLs awaiting update */
-static struct afs_vlocation *afs_vlocation_update; /* VL currently being updated */
-static DEFINE_SPINLOCK(afs_vlocation_update_lock); /* lock guarding update queue */
-
-#ifdef AFS_CACHING_SUPPORT
-static cachefs_match_val_t afs_vlocation_cache_match(void *target,
- const void *entry);
-static void afs_vlocation_cache_update(void *source, void *entry);
-
-struct cachefs_index_def afs_vlocation_cache_index_def = {
- .name = "vldb",
- .data_size = sizeof(struct afs_cache_vlocation),
- .keys[0] = { CACHEFS_INDEX_KEYS_ASCIIZ, 64 },
- .match = afs_vlocation_cache_match,
- .update = afs_vlocation_cache_update,
-};
-#endif
-
-/*****************************************************************************/
/*
* iterate through the VL servers in a cell until one of them admits knowing
* about the volume in question
- * - caller must have cell->vl_sem write-locked
*/
-static int afs_vlocation_access_vl_by_name(struct afs_vlocation *vlocation,
- const char *name,
- unsigned namesz,
+static int afs_vlocation_access_vl_by_name(struct afs_vlocation *vl,
+ struct key *key,
struct afs_cache_vlocation *vldb)
{
- struct afs_server *server = NULL;
- struct afs_cell *cell = vlocation->cell;
+ struct afs_cell *cell = vl->cell;
+ struct in_addr addr;
int count, ret;
- _enter("%s,%*.*s,%u", cell->name, namesz, namesz, name, namesz);
+ _enter("%s,%s", cell->name, vl->vldb.name);
+ down_write(&vl->cell->vl_sem);
ret = -ENOMEDIUM;
for (count = cell->vl_naddrs; count > 0; count--) {
- _debug("CellServ[%hu]: %08x",
- cell->vl_curr_svix,
- cell->vl_addrs[cell->vl_curr_svix].s_addr);
-
- /* try and create a server */
- ret = afs_server_lookup(cell,
- &cell->vl_addrs[cell->vl_curr_svix],
- &server);
- switch (ret) {
- case 0:
- break;
- case -ENOMEM:
- case -ENONET:
- goto out;
- default:
- goto rotate;
- }
+ addr = cell->vl_addrs[cell->vl_curr_svix];
+
+ _debug("CellServ[%hu]: %08x", cell->vl_curr_svix, addr.s_addr);
/* attempt to access the VL server */
- ret = afs_rxvl_get_entry_by_name(server, name, namesz, vldb);
+ ret = afs_vl_get_entry_by_name(&addr, key, vl->vldb.name, vldb,
+ &afs_sync_call);
switch (ret) {
case 0:
- afs_put_server(server);
goto out;
case -ENOMEM:
case -ENONET:
case -ENETUNREACH:
case -EHOSTUNREACH:
case -ECONNREFUSED:
- down_write(&server->sem);
- if (server->vlserver) {
- rxrpc_put_connection(server->vlserver);
- server->vlserver = NULL;
- }
- up_write(&server->sem);
- afs_put_server(server);
if (ret == -ENOMEM || ret == -ENONET)
goto out;
goto rotate;
case -ENOMEDIUM:
- afs_put_server(server);
goto out;
default:
- afs_put_server(server);
- ret = -ENOMEDIUM;
+ ret = -EIO;
goto rotate;
}
@@ -146,76 +76,66 @@ static int afs_vlocation_access_vl_by_name(struct afs_vlocation *vlocation,
cell->vl_curr_svix %= cell->vl_naddrs;
}
- out:
+out:
+ up_write(&vl->cell->vl_sem);
_leave(" = %d", ret);
return ret;
+}
-} /* end afs_vlocation_access_vl_by_name() */
-
-/*****************************************************************************/
/*
* iterate through the VL servers in a cell until one of them admits knowing
* about the volume in question
- * - caller must have cell->vl_sem write-locked
*/
-static int afs_vlocation_access_vl_by_id(struct afs_vlocation *vlocation,
+static int afs_vlocation_access_vl_by_id(struct afs_vlocation *vl,
+ struct key *key,
afs_volid_t volid,
afs_voltype_t voltype,
struct afs_cache_vlocation *vldb)
{
- struct afs_server *server = NULL;
- struct afs_cell *cell = vlocation->cell;
+ struct afs_cell *cell = vl->cell;
+ struct in_addr addr;
int count, ret;
_enter("%s,%x,%d,", cell->name, volid, voltype);
+ down_write(&vl->cell->vl_sem);
ret = -ENOMEDIUM;
for (count = cell->vl_naddrs; count > 0; count--) {
- _debug("CellServ[%hu]: %08x",
- cell->vl_curr_svix,
- cell->vl_addrs[cell->vl_curr_svix].s_addr);
-
- /* try and create a server */
- ret = afs_server_lookup(cell,
- &cell->vl_addrs[cell->vl_curr_svix],
- &server);
- switch (ret) {
- case 0:
- break;
- case -ENOMEM:
- case -ENONET:
- goto out;
- default:
- goto rotate;
- }
+ addr = cell->vl_addrs[cell->vl_curr_svix];
+
+ _debug("CellServ[%hu]: %08x", cell->vl_curr_svix, addr.s_addr);
/* attempt to access the VL server */
- ret = afs_rxvl_get_entry_by_id(server, volid, voltype, vldb);
+ ret = afs_vl_get_entry_by_id(&addr, key, volid, voltype, vldb,
+ &afs_sync_call);
switch (ret) {
case 0:
- afs_put_server(server);
goto out;
case -ENOMEM:
case -ENONET:
case -ENETUNREACH:
case -EHOSTUNREACH:
case -ECONNREFUSED:
- down_write(&server->sem);
- if (server->vlserver) {
- rxrpc_put_connection(server->vlserver);
- server->vlserver = NULL;
- }
- up_write(&server->sem);
- afs_put_server(server);
if (ret == -ENOMEM || ret == -ENONET)
goto out;
goto rotate;
+ case -EBUSY:
+ vl->upd_busy_cnt++;
+ if (vl->upd_busy_cnt <= 3) {
+ if (vl->upd_busy_cnt > 1) {
+ /* second+ BUSY - sleep a little bit */
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ schedule_timeout(1);
+ __set_current_state(TASK_RUNNING);
+ }
+ continue;
+ }
+ break;
case -ENOMEDIUM:
- afs_put_server(server);
- goto out;
+ vl->upd_rej_cnt++;
+ goto rotate;
default:
- afs_put_server(server);
- ret = -ENOMEDIUM;
+ ret = -EIO;
goto rotate;
}
@@ -223,729 +143,579 @@ static int afs_vlocation_access_vl_by_id(struct afs_vlocation *vlocation,
rotate:
cell->vl_curr_svix++;
cell->vl_curr_svix %= cell->vl_naddrs;
+ vl->upd_busy_cnt = 0;
}
- out:
+out:
+ if (ret < 0 && vl->upd_rej_cnt > 0) {
+ printk(KERN_NOTICE "kAFS:"
+ " Active volume no longer valid '%s'\n",
+ vl->vldb.name);
+ vl->valid = 0;
+ ret = -ENOMEDIUM;
+ }
+
+ up_write(&vl->cell->vl_sem);
_leave(" = %d", ret);
return ret;
+}
-} /* end afs_vlocation_access_vl_by_id() */
-
-/*****************************************************************************/
/*
- * lookup volume location
- * - caller must have cell->vol_sem write-locked
- * - iterate through the VL servers in a cell until one of them admits knowing
- * about the volume in question
- * - lookup in the local cache if not able to find on the VL server
- * - insert/update in the local cache if did get a VL response
+ * allocate a volume location record
*/
-int afs_vlocation_lookup(struct afs_cell *cell,
- const char *name,
- unsigned namesz,
- struct afs_vlocation **_vlocation)
+static struct afs_vlocation *afs_vlocation_alloc(struct afs_cell *cell,
+ const char *name,
+ size_t namesz)
{
- struct afs_cache_vlocation vldb;
- struct afs_vlocation *vlocation;
- afs_voltype_t voltype;
- afs_volid_t vid;
- int active = 0, ret;
-
- _enter("{%s},%*.*s,%u,", cell->name, namesz, namesz, name, namesz);
-
- if (namesz > sizeof(vlocation->vldb.name)) {
- _leave(" = -ENAMETOOLONG");
- return -ENAMETOOLONG;
- }
-
- /* search the cell's active list first */
- list_for_each_entry(vlocation, &cell->vl_list, link) {
- if (namesz < sizeof(vlocation->vldb.name) &&
- vlocation->vldb.name[namesz] != '\0')
- continue;
-
- if (memcmp(vlocation->vldb.name, name, namesz) == 0)
- goto found_in_memory;
- }
-
- /* search the cell's graveyard list second */
- spin_lock(&cell->vl_gylock);
- list_for_each_entry(vlocation, &cell->vl_graveyard, link) {
- if (namesz < sizeof(vlocation->vldb.name) &&
- vlocation->vldb.name[namesz] != '\0')
- continue;
-
- if (memcmp(vlocation->vldb.name, name, namesz) == 0)
- goto found_in_graveyard;
- }
- spin_unlock(&cell->vl_gylock);
-
- /* not in the cell's in-memory lists - create a new record */
- vlocation = kzalloc(sizeof(struct afs_vlocation), GFP_KERNEL);
- if (!vlocation)
- return -ENOMEM;
-
- atomic_set(&vlocation->usage, 1);
- INIT_LIST_HEAD(&vlocation->link);
- rwlock_init(&vlocation->lock);
- memcpy(vlocation->vldb.name, name, namesz);
-
- afs_timer_init(&vlocation->timeout, &afs_vlocation_timer_ops);
- afs_timer_init(&vlocation->upd_timer, &afs_vlocation_update_timer_ops);
- afs_async_op_init(&vlocation->upd_op, &afs_vlocation_update_op_ops);
-
- afs_get_cell(cell);
- vlocation->cell = cell;
-
- list_add_tail(&vlocation->link, &cell->vl_list);
-
-#ifdef AFS_CACHING_SUPPORT
- /* we want to store it in the cache, plus it might already be
- * encached */
- cachefs_acquire_cookie(cell->cache,
- &afs_volume_cache_index_def,
- vlocation,
- &vlocation->cache);
-
- if (vlocation->valid)
- goto found_in_cache;
-#endif
-
- /* try to look up an unknown volume in the cell VL databases by name */
- ret = afs_vlocation_access_vl_by_name(vlocation, name, namesz, &vldb);
- if (ret < 0) {
- printk("kAFS: failed to locate '%*.*s' in cell '%s'\n",
- namesz, namesz, name, cell->name);
- goto error;
+ struct afs_vlocation *vl;
+
+ vl = kzalloc(sizeof(struct afs_vlocation), GFP_KERNEL);
+ if (vl) {
+ vl->cell = cell;
+ vl->state = AFS_VL_NEW;
+ atomic_set(&vl->usage, 1);
+ INIT_LIST_HEAD(&vl->link);
+ INIT_LIST_HEAD(&vl->grave);
+ INIT_LIST_HEAD(&vl->update);
+ init_waitqueue_head(&vl->waitq);
+ spin_lock_init(&vl->lock);
+ memcpy(vl->vldb.name, name, namesz);
}
- goto found_on_vlserver;
-
- found_in_graveyard:
- /* found in the graveyard - resurrect */
- _debug("found in graveyard");
- atomic_inc(&vlocation->usage);
- list_move_tail(&vlocation->link, &cell->vl_list);
- spin_unlock(&cell->vl_gylock);
-
- afs_kafstimod_del_timer(&vlocation->timeout);
- goto active;
-
- found_in_memory:
- /* found in memory - check to see if it's active */
- _debug("found in memory");
- atomic_inc(&vlocation->usage);
+ _leave(" = %p", vl);
+ return vl;
+}
- active:
- active = 1;
+/*
+ * update record if we found it in the cache
+ */
+static int afs_vlocation_update_record(struct afs_vlocation *vl,
+ struct key *key,
+ struct afs_cache_vlocation *vldb)
+{
+ afs_voltype_t voltype;
+ afs_volid_t vid;
+ int ret;
-#ifdef AFS_CACHING_SUPPORT
- found_in_cache:
-#endif
/* try to look up a cached volume in the cell VL databases by ID */
- _debug("found in cache");
-
_debug("Locally Cached: %s %02x { %08x(%x) %08x(%x) %08x(%x) }",
- vlocation->vldb.name,
- vlocation->vldb.vidmask,
- ntohl(vlocation->vldb.servers[0].s_addr),
- vlocation->vldb.srvtmask[0],
- ntohl(vlocation->vldb.servers[1].s_addr),
- vlocation->vldb.srvtmask[1],
- ntohl(vlocation->vldb.servers[2].s_addr),
- vlocation->vldb.srvtmask[2]
- );
+ vl->vldb.name,
+ vl->vldb.vidmask,
+ ntohl(vl->vldb.servers[0].s_addr),
+ vl->vldb.srvtmask[0],
+ ntohl(vl->vldb.servers[1].s_addr),
+ vl->vldb.srvtmask[1],
+ ntohl(vl->vldb.servers[2].s_addr),
+ vl->vldb.srvtmask[2]);
_debug("Vids: %08x %08x %08x",
- vlocation->vldb.vid[0],
- vlocation->vldb.vid[1],
- vlocation->vldb.vid[2]);
+ vl->vldb.vid[0],
+ vl->vldb.vid[1],
+ vl->vldb.vid[2]);
- if (vlocation->vldb.vidmask & AFS_VOL_VTM_RW) {
- vid = vlocation->vldb.vid[0];
+ if (vl->vldb.vidmask & AFS_VOL_VTM_RW) {
+ vid = vl->vldb.vid[0];
voltype = AFSVL_RWVOL;
- }
- else if (vlocation->vldb.vidmask & AFS_VOL_VTM_RO) {
- vid = vlocation->vldb.vid[1];
+ } else if (vl->vldb.vidmask & AFS_VOL_VTM_RO) {
+ vid = vl->vldb.vid[1];
voltype = AFSVL_ROVOL;
- }
- else if (vlocation->vldb.vidmask & AFS_VOL_VTM_BAK) {
- vid = vlocation->vldb.vid[2];
+ } else if (vl->vldb.vidmask & AFS_VOL_VTM_BAK) {
+ vid = vl->vldb.vid[2];
voltype = AFSVL_BACKVOL;
- }
- else {
+ } else {
BUG();
vid = 0;
voltype = 0;
}
- ret = afs_vlocation_access_vl_by_id(vlocation, vid, voltype, &vldb);
+ /* contact the server to make sure the volume is still available
+ * - TODO: need to handle disconnected operation here
+ */
+ ret = afs_vlocation_access_vl_by_id(vl, key, vid, voltype, vldb);
switch (ret) {
/* net error */
default:
- printk("kAFS: failed to volume '%*.*s' (%x) up in '%s': %d\n",
- namesz, namesz, name, vid, cell->name, ret);
- goto error;
+ printk(KERN_WARNING "kAFS:"
+ " failed to update volume '%s' (%x) up in '%s': %d\n",
+ vl->vldb.name, vid, vl->cell->name, ret);
+ _leave(" = %d", ret);
+ return ret;
/* pulled from local cache into memory */
case 0:
- goto found_on_vlserver;
+ _leave(" = 0");
+ return 0;
/* uh oh... looks like the volume got deleted */
case -ENOMEDIUM:
- printk("kAFS: volume '%*.*s' (%x) does not exist '%s'\n",
- namesz, namesz, name, vid, cell->name);
+ printk(KERN_ERR "kAFS:"
+ " volume '%s' (%x) does not exist '%s'\n",
+ vl->vldb.name, vid, vl->cell->name);
/* TODO: make existing record unavailable */
- goto error;
+ _leave(" = %d", ret);
+ return ret;
}
+}
- found_on_vlserver:
- _debug("Done VL Lookup: %*.*s %02x { %08x(%x) %08x(%x) %08x(%x) }",
- namesz, namesz, name,
- vldb.vidmask,
- ntohl(vldb.servers[0].s_addr), vldb.srvtmask[0],
- ntohl(vldb.servers[1].s_addr), vldb.srvtmask[1],
- ntohl(vldb.servers[2].s_addr), vldb.srvtmask[2]
- );
-
- _debug("Vids: %08x %08x %08x", vldb.vid[0], vldb.vid[1], vldb.vid[2]);
+/*
+ * apply the update to a VL record
+ */
+static void afs_vlocation_apply_update(struct afs_vlocation *vl,
+ struct afs_cache_vlocation *vldb)
+{
+ _debug("Done VL Lookup: %s %02x { %08x(%x) %08x(%x) %08x(%x) }",
+ vldb->name, vldb->vidmask,
+ ntohl(vldb->servers[0].s_addr), vldb->srvtmask[0],
+ ntohl(vldb->servers[1].s_addr), vldb->srvtmask[1],
+ ntohl(vldb->servers[2].s_addr), vldb->srvtmask[2]);
- if ((namesz < sizeof(vlocation->vldb.name) &&
- vlocation->vldb.name[namesz] != '\0') ||
- memcmp(vldb.name, name, namesz) != 0)
- printk("kAFS: name of volume '%*.*s' changed to '%s' on server\n",
- namesz, namesz, name, vldb.name);
+ _debug("Vids: %08x %08x %08x",
+ vldb->vid[0], vldb->vid[1], vldb->vid[2]);
- memcpy(&vlocation->vldb, &vldb, sizeof(vlocation->vldb));
+ if (strcmp(vldb->name, vl->vldb.name) != 0)
+ printk(KERN_NOTICE "kAFS:"
+ " name of volume '%s' changed to '%s' on server\n",
+ vl->vldb.name, vldb->name);
- afs_kafstimod_add_timer(&vlocation->upd_timer, 10 * HZ);
+ vl->vldb = *vldb;
#ifdef AFS_CACHING_SUPPORT
/* update volume entry in local cache */
- cachefs_update_cookie(vlocation->cache);
-#endif
-
- *_vlocation = vlocation;
- _leave(" = 0 (%p)",vlocation);
- return 0;
-
- error:
- if (vlocation) {
- if (active) {
- __afs_put_vlocation(vlocation);
- }
- else {
- list_del(&vlocation->link);
-#ifdef AFS_CACHING_SUPPORT
- cachefs_relinquish_cookie(vlocation->cache, 0);
+ cachefs_update_cookie(vl->cache);
#endif
- afs_put_cell(vlocation->cell);
- kfree(vlocation);
- }
- }
-
- _leave(" = %d", ret);
- return ret;
-} /* end afs_vlocation_lookup() */
+}
-/*****************************************************************************/
/*
- * finish using a volume location record
- * - caller must have cell->vol_sem write-locked
+ * fill in a volume location record, consulting the cache and the VL server
+ * both
*/
-static void __afs_put_vlocation(struct afs_vlocation *vlocation)
+static int afs_vlocation_fill_in_record(struct afs_vlocation *vl,
+ struct key *key)
{
- struct afs_cell *cell;
+ struct afs_cache_vlocation vldb;
+ int ret;
- if (!vlocation)
- return;
+ _enter("");
- _enter("%s", vlocation->vldb.name);
+ ASSERTCMP(vl->valid, ==, 0);
- cell = vlocation->cell;
+ memset(&vldb, 0, sizeof(vldb));
- /* sanity check */
- BUG_ON(atomic_read(&vlocation->usage) <= 0);
+ /* see if we have an in-cache copy (will set vl->valid if there is) */
+#ifdef AFS_CACHING_SUPPORT
+ cachefs_acquire_cookie(cell->cache,
+ &afs_volume_cache_index_def,
+ vlocation,
+ &vl->cache);
+#endif
- spin_lock(&cell->vl_gylock);
- if (likely(!atomic_dec_and_test(&vlocation->usage))) {
- spin_unlock(&cell->vl_gylock);
- _leave("");
- return;
+ if (vl->valid) {
+ /* try to update a known volume in the cell VL databases by
+ * ID as the name may have changed */
+ _debug("found in cache");
+ ret = afs_vlocation_update_record(vl, key, &vldb);
+ } else {
+ /* try to look up an unknown volume in the cell VL databases by
+ * name */
+ ret = afs_vlocation_access_vl_by_name(vl, key, &vldb);
+ if (ret < 0) {
+ printk("kAFS: failed to locate '%s' in cell '%s'\n",
+ vl->vldb.name, vl->cell->name);
+ return ret;
+ }
}
- /* move to graveyard queue */
- list_move_tail(&vlocation->link,&cell->vl_graveyard);
-
- /* remove from pending timeout queue (refcounted if actually being
- * updated) */
- list_del_init(&vlocation->upd_op.link);
-
- /* time out in 10 secs */
- afs_kafstimod_del_timer(&vlocation->upd_timer);
- afs_kafstimod_add_timer(&vlocation->timeout, 10 * HZ);
-
- spin_unlock(&cell->vl_gylock);
-
- _leave(" [killed]");
-} /* end __afs_put_vlocation() */
-
-/*****************************************************************************/
-/*
- * finish using a volume location record
- */
-void afs_put_vlocation(struct afs_vlocation *vlocation)
-{
- if (vlocation) {
- struct afs_cell *cell = vlocation->cell;
-
- down_write(&cell->vl_sem);
- __afs_put_vlocation(vlocation);
- up_write(&cell->vl_sem);
- }
-} /* end afs_put_vlocation() */
+ afs_vlocation_apply_update(vl, &vldb);
+ _leave(" = 0");
+ return 0;
+}
-/*****************************************************************************/
/*
- * timeout vlocation record
- * - removes from the cell's graveyard if the usage count is zero
+ * queue a vlocation record for updates
*/
-void afs_vlocation_do_timeout(struct afs_vlocation *vlocation)
+void afs_vlocation_queue_for_updates(struct afs_vlocation *vl)
{
- struct afs_cell *cell;
+ struct afs_vlocation *xvl;
- _enter("%s", vlocation->vldb.name);
+ /* wait at least 10 minutes before updating... */
+ vl->update_at = get_seconds() + afs_vlocation_update_timeout;
- cell = vlocation->cell;
+ spin_lock(&afs_vlocation_updates_lock);
- BUG_ON(atomic_read(&vlocation->usage) < 0);
-
- /* remove from graveyard if still dead */
- spin_lock(&cell->vl_gylock);
- if (atomic_read(&vlocation->usage) == 0)
- list_del_init(&vlocation->link);
- else
- vlocation = NULL;
- spin_unlock(&cell->vl_gylock);
-
- if (!vlocation) {
- _leave("");
- return; /* resurrected */
+ if (!list_empty(&afs_vlocation_updates)) {
+ /* ... but wait at least 1 second more than the newest record
+ * already queued so that we don't spam the VL server suddenly
+ * with lots of requests
+ */
+ xvl = list_entry(afs_vlocation_updates.prev,
+ struct afs_vlocation, update);
+ if (vl->update_at <= xvl->update_at)
+ vl->update_at = xvl->update_at + 1;
+ } else {
+ queue_delayed_work(afs_vlocation_update_worker,
+ &afs_vlocation_update,
+ afs_vlocation_update_timeout * HZ);
}
- /* we can now destroy it properly */
-#ifdef AFS_CACHING_SUPPORT
- cachefs_relinquish_cookie(vlocation->cache, 0);
-#endif
- afs_put_cell(cell);
-
- kfree(vlocation);
-
- _leave(" [destroyed]");
-} /* end afs_vlocation_do_timeout() */
+ list_add_tail(&vl->update, &afs_vlocation_updates);
+ spin_unlock(&afs_vlocation_updates_lock);
+}
-/*****************************************************************************/
/*
- * send an update operation to the currently selected server
+ * lookup volume location
+ * - iterate through the VL servers in a cell until one of them admits knowing
+ * about the volume in question
+ * - lookup in the local cache if not able to find on the VL server
+ * - insert/update in the local cache if did get a VL response
*/
-static int afs_vlocation_update_begin(struct afs_vlocation *vlocation)
+struct afs_vlocation *afs_vlocation_lookup(struct afs_cell *cell,
+ struct key *key,
+ const char *name,
+ size_t namesz)
{
- afs_voltype_t voltype;
- afs_volid_t vid;
+ struct afs_vlocation *vl;
int ret;
- _enter("%s{ufs=%u ucs=%u}",
- vlocation->vldb.name,
- vlocation->upd_first_svix,
- vlocation->upd_curr_svix);
+ _enter("{%s},{%x},%*.*s,%zu",
+ cell->name, key_serial(key),
+ (int) namesz, (int) namesz, name, namesz);
- /* try to look up a cached volume in the cell VL databases by ID */
- if (vlocation->vldb.vidmask & AFS_VOL_VTM_RW) {
- vid = vlocation->vldb.vid[0];
- voltype = AFSVL_RWVOL;
- }
- else if (vlocation->vldb.vidmask & AFS_VOL_VTM_RO) {
- vid = vlocation->vldb.vid[1];
- voltype = AFSVL_ROVOL;
+ if (namesz > sizeof(vl->vldb.name)) {
+ _leave(" = -ENAMETOOLONG");
+ return ERR_PTR(-ENAMETOOLONG);
}
- else if (vlocation->vldb.vidmask & AFS_VOL_VTM_BAK) {
- vid = vlocation->vldb.vid[2];
- voltype = AFSVL_BACKVOL;
+
+ /* see if we have an in-memory copy first */
+ down_write(&cell->vl_sem);
+ spin_lock(&cell->vl_lock);
+ list_for_each_entry(vl, &cell->vl_list, link) {
+ if (vl->vldb.name[namesz] != '\0')
+ continue;
+ if (memcmp(vl->vldb.name, name, namesz) == 0)
+ goto found_in_memory;
}
- else {
- BUG();
- vid = 0;
- voltype = 0;
+ spin_unlock(&cell->vl_lock);
+
+ /* not in the cell's in-memory lists - create a new record */
+ vl = afs_vlocation_alloc(cell, name, namesz);
+ if (!vl) {
+ up_write(&cell->vl_sem);
+ return ERR_PTR(-ENOMEM);
}
- /* contact the chosen server */
- ret = afs_server_lookup(
- vlocation->cell,
- &vlocation->cell->vl_addrs[vlocation->upd_curr_svix],
- &vlocation->upd_op.server);
+ afs_get_cell(cell);
- switch (ret) {
- case 0:
- break;
- case -ENOMEM:
- case -ENONET:
- default:
- _leave(" = %d", ret);
- return ret;
- }
+ list_add_tail(&vl->link, &cell->vl_list);
+ vl->state = AFS_VL_CREATING;
+ up_write(&cell->vl_sem);
- /* initiate the update operation */
- ret = afs_rxvl_get_entry_by_id_async(&vlocation->upd_op, vid, voltype);
- if (ret < 0) {
- _leave(" = %d", ret);
- return ret;
+fill_in_record:
+ ret = afs_vlocation_fill_in_record(vl, key);
+ if (ret < 0)
+ goto error_abandon;
+ spin_lock(&vl->lock);
+ vl->state = AFS_VL_VALID;
+ spin_unlock(&vl->lock);
+ wake_up(&vl->waitq);
+
+ /* schedule for regular updates */
+ afs_vlocation_queue_for_updates(vl);
+ goto success;
+
+found_in_memory:
+ /* found in memory */
+ _debug("found in memory");
+ atomic_inc(&vl->usage);
+ spin_unlock(&cell->vl_lock);
+ if (!list_empty(&vl->grave)) {
+ spin_lock(&afs_vlocation_graveyard_lock);
+ list_del_init(&vl->grave);
+ spin_unlock(&afs_vlocation_graveyard_lock);
}
+ up_write(&cell->vl_sem);
+
+ /* see if it was an abandoned record that we might try filling in */
+ spin_lock(&vl->lock);
+ while (vl->state != AFS_VL_VALID) {
+ afs_vlocation_state_t state = vl->state;
+
+ _debug("invalid [state %d]", state);
+
+ if (state == AFS_VL_NEW || state == AFS_VL_NO_VOLUME) {
+ vl->state = AFS_VL_CREATING;
+ spin_unlock(&vl->lock);
+ goto fill_in_record;
+ }
+
+ /* must now wait for creation or update by someone else to
+ * complete */
+ _debug("wait");
+ spin_unlock(&vl->lock);
+ ret = wait_event_interruptible(vl->waitq,
+ vl->state == AFS_VL_NEW ||
+ vl->state == AFS_VL_VALID ||
+ vl->state == AFS_VL_NO_VOLUME);
+ if (ret < 0)
+ goto error;
+ spin_lock(&vl->lock);
+ }
+ spin_unlock(&vl->lock);
+
+success:
+ _leave(" = %p",vl);
+ return vl;
+
+error_abandon:
+ spin_lock(&vl->lock);
+ vl->state = AFS_VL_NEW;
+ spin_unlock(&vl->lock);
+ wake_up(&vl->waitq);
+error:
+ ASSERT(vl != NULL);
+ afs_put_vlocation(vl);
_leave(" = %d", ret);
- return ret;
-} /* end afs_vlocation_update_begin() */
+ return ERR_PTR(ret);
+}
-/*****************************************************************************/
/*
- * abandon updating a VL record
- * - does not restart the update timer
+ * finish using a volume location record
*/
-static void afs_vlocation_update_abandon(struct afs_vlocation *vlocation,
- afs_vlocation_upd_t state,
- int ret)
+void afs_put_vlocation(struct afs_vlocation *vl)
{
- _enter("%s,%u", vlocation->vldb.name, state);
-
- if (ret < 0)
- printk("kAFS: Abandoning VL update '%s': %d\n",
- vlocation->vldb.name, ret);
-
- /* discard the server record */
- afs_put_server(vlocation->upd_op.server);
- vlocation->upd_op.server = NULL;
+ if (!vl)
+ return;
- spin_lock(&afs_vlocation_update_lock);
- afs_vlocation_update = NULL;
- vlocation->upd_state = state;
+ _enter("%s", vl->vldb.name);
- /* TODO: start updating next VL record on pending list */
+ ASSERTCMP(atomic_read(&vl->usage), >, 0);
- spin_unlock(&afs_vlocation_update_lock);
+ if (likely(!atomic_dec_and_test(&vl->usage))) {
+ _leave("");
+ return;
+ }
- _leave("");
-} /* end afs_vlocation_update_abandon() */
+ spin_lock(&afs_vlocation_graveyard_lock);
+ if (atomic_read(&vl->usage) == 0) {
+ _debug("buried");
+ list_move_tail(&vl->grave, &afs_vlocation_graveyard);
+ vl->time_of_death = get_seconds();
+ schedule_delayed_work(&afs_vlocation_reap,
+ afs_vlocation_timeout * HZ);
+
+ /* suspend updates on this record */
+ if (!list_empty(&vl->update)) {
+ spin_lock(&afs_vlocation_updates_lock);
+ list_del_init(&vl->update);
+ spin_unlock(&afs_vlocation_updates_lock);
+ }
+ }
+ spin_unlock(&afs_vlocation_graveyard_lock);
+ _leave(" [killed?]");
+}
-/*****************************************************************************/
/*
- * handle periodic update timeouts and busy retry timeouts
- * - called from kafstimod
+ * destroy a dead volume location record
*/
-static void afs_vlocation_update_timer(struct afs_timer *timer)
+static void afs_vlocation_destroy(struct afs_vlocation *vl)
{
- struct afs_vlocation *vlocation =
- list_entry(timer, struct afs_vlocation, upd_timer);
- int ret;
+ _enter("%p", vl);
- _enter("%s", vlocation->vldb.name);
+#ifdef AFS_CACHING_SUPPORT
+ cachefs_relinquish_cookie(vl->cache, 0);
+#endif
- /* only update if not in the graveyard (defend against putting too) */
- spin_lock(&vlocation->cell->vl_gylock);
+ afs_put_cell(vl->cell);
+ kfree(vl);
+}
- if (!atomic_read(&vlocation->usage))
- goto out_unlock1;
+/*
+ * reap dead volume location records
+ */
+static void afs_vlocation_reaper(struct work_struct *work)
+{
+ LIST_HEAD(corpses);
+ struct afs_vlocation *vl;
+ unsigned long delay, expiry;
+ time_t now;
- spin_lock(&afs_vlocation_update_lock);
+ _enter("");
- /* if we were woken up due to EBUSY sleep then restart immediately if
- * possible or else jump to front of pending queue */
- if (vlocation->upd_state == AFS_VLUPD_BUSYSLEEP) {
- if (afs_vlocation_update) {
- list_add(&vlocation->upd_op.link,
- &afs_vlocation_update_pendq);
+ now = get_seconds();
+ spin_lock(&afs_vlocation_graveyard_lock);
+
+ while (!list_empty(&afs_vlocation_graveyard)) {
+ vl = list_entry(afs_vlocation_graveyard.next,
+ struct afs_vlocation, grave);
+
+ _debug("check %p", vl);
+
+ /* the queue is ordered most dead first */
+ expiry = vl->time_of_death + afs_vlocation_timeout;
+ if (expiry > now) {
+ delay = (expiry - now) * HZ;
+ _debug("delay %lu", delay);
+ if (!schedule_delayed_work(&afs_vlocation_reap,
+ delay)) {
+ cancel_delayed_work(&afs_vlocation_reap);
+ schedule_delayed_work(&afs_vlocation_reap,
+ delay);
+ }
+ break;
}
- else {
- afs_get_vlocation(vlocation);
- afs_vlocation_update = vlocation;
- vlocation->upd_state = AFS_VLUPD_INPROGRESS;
+
+ spin_lock(&vl->cell->vl_lock);
+ if (atomic_read(&vl->usage) > 0) {
+ _debug("no reap");
+ list_del_init(&vl->grave);
+ } else {
+ _debug("reap");
+ list_move_tail(&vl->grave, &corpses);
+ list_del_init(&vl->link);
}
- goto out_unlock2;
+ spin_unlock(&vl->cell->vl_lock);
}
- /* put on pending queue if there's already another update in progress */
- if (afs_vlocation_update) {
- vlocation->upd_state = AFS_VLUPD_PENDING;
- list_add_tail(&vlocation->upd_op.link,
- &afs_vlocation_update_pendq);
- goto out_unlock2;
- }
+ spin_unlock(&afs_vlocation_graveyard_lock);
- /* hold a ref on it while actually updating */
- afs_get_vlocation(vlocation);
- afs_vlocation_update = vlocation;
- vlocation->upd_state = AFS_VLUPD_INPROGRESS;
-
- spin_unlock(&afs_vlocation_update_lock);
- spin_unlock(&vlocation->cell->vl_gylock);
-
- /* okay... we can start the update */
- _debug("BEGIN VL UPDATE [%s]", vlocation->vldb.name);
- vlocation->upd_first_svix = vlocation->cell->vl_curr_svix;
- vlocation->upd_curr_svix = vlocation->upd_first_svix;
- vlocation->upd_rej_cnt = 0;
- vlocation->upd_busy_cnt = 0;
-
- ret = afs_vlocation_update_begin(vlocation);
- if (ret < 0) {
- afs_vlocation_update_abandon(vlocation, AFS_VLUPD_SLEEP, ret);
- afs_kafstimod_add_timer(&vlocation->upd_timer,
- AFS_VLDB_TIMEOUT);
- afs_put_vlocation(vlocation);
+ /* now reap the corpses we've extracted */
+ while (!list_empty(&corpses)) {
+ vl = list_entry(corpses.next, struct afs_vlocation, grave);
+ list_del(&vl->grave);
+ afs_vlocation_destroy(vl);
}
_leave("");
- return;
+}
- out_unlock2:
- spin_unlock(&afs_vlocation_update_lock);
- out_unlock1:
- spin_unlock(&vlocation->cell->vl_gylock);
- _leave("");
- return;
+/*
+ * initialise the VL update process
+ */
+int __init afs_vlocation_update_init(void)
+{
+ afs_vlocation_update_worker =
+ create_singlethread_workqueue("kafs_vlupdated");
+ return afs_vlocation_update_worker ? 0 : -ENOMEM;
+}
-} /* end afs_vlocation_update_timer() */
+/*
+ * discard all the volume location records for rmmod
+ */
+void afs_vlocation_purge(void)
+{
+ afs_vlocation_timeout = 0;
+
+ spin_lock(&afs_vlocation_updates_lock);
+ list_del_init(&afs_vlocation_updates);
+ spin_unlock(&afs_vlocation_updates_lock);
+ cancel_delayed_work(&afs_vlocation_update);
+ queue_delayed_work(afs_vlocation_update_worker,
+ &afs_vlocation_update, 0);
+ destroy_workqueue(afs_vlocation_update_worker);
+
+ cancel_delayed_work(&afs_vlocation_reap);
+ schedule_delayed_work(&afs_vlocation_reap, 0);
+}
-/*****************************************************************************/
/*
- * attend to an update operation upon which an event happened
- * - called in kafsasyncd context
+ * update a volume location
*/
-static void afs_vlocation_update_attend(struct afs_async_op *op)
+static void afs_vlocation_updater(struct work_struct *work)
{
struct afs_cache_vlocation vldb;
- struct afs_vlocation *vlocation =
- list_entry(op, struct afs_vlocation, upd_op);
- unsigned tmp;
+ struct afs_vlocation *vl, *xvl;
+ time_t now;
+ long timeout;
int ret;
- _enter("%s", vlocation->vldb.name);
-
- ret = afs_rxvl_get_entry_by_id_async2(op, &vldb);
- switch (ret) {
- case -EAGAIN:
- _leave(" [unfinished]");
- return;
-
- case 0:
- _debug("END VL UPDATE: %d\n", ret);
- vlocation->valid = 1;
-
- _debug("Done VL Lookup: %02x { %08x(%x) %08x(%x) %08x(%x) }",
- vldb.vidmask,
- ntohl(vldb.servers[0].s_addr), vldb.srvtmask[0],
- ntohl(vldb.servers[1].s_addr), vldb.srvtmask[1],
- ntohl(vldb.servers[2].s_addr), vldb.srvtmask[2]
- );
-
- _debug("Vids: %08x %08x %08x",
- vldb.vid[0], vldb.vid[1], vldb.vid[2]);
-
- afs_vlocation_update_abandon(vlocation, AFS_VLUPD_SLEEP, 0);
-
- down_write(&vlocation->cell->vl_sem);
-
- /* actually update the cache */
- if (strncmp(vldb.name, vlocation->vldb.name,
- sizeof(vlocation->vldb.name)) != 0)
- printk("kAFS: name of volume '%s'"
- " changed to '%s' on server\n",
- vlocation->vldb.name, vldb.name);
-
- memcpy(&vlocation->vldb, &vldb, sizeof(vlocation->vldb));
-
-#if 0
- /* TODO update volume entry in local cache */
-#endif
-
- up_write(&vlocation->cell->vl_sem);
-
- if (ret < 0)
- printk("kAFS: failed to update local cache: %d\n", ret);
-
- afs_kafstimod_add_timer(&vlocation->upd_timer,
- AFS_VLDB_TIMEOUT);
- afs_put_vlocation(vlocation);
- _leave(" [found]");
- return;
-
- case -ENOMEDIUM:
- vlocation->upd_rej_cnt++;
- goto try_next;
-
- /* the server is locked - retry in a very short while */
- case -EBUSY:
- vlocation->upd_busy_cnt++;
- if (vlocation->upd_busy_cnt > 3)
- goto try_next; /* too many retries */
-
- afs_vlocation_update_abandon(vlocation,
- AFS_VLUPD_BUSYSLEEP, 0);
- afs_kafstimod_add_timer(&vlocation->upd_timer, HZ / 2);
- afs_put_vlocation(vlocation);
- _leave(" [busy]");
- return;
-
- case -ENETUNREACH:
- case -EHOSTUNREACH:
- case -ECONNREFUSED:
- case -EREMOTEIO:
- /* record bad vlserver info in the cell too
- * - TODO: use down_write_trylock() if available
- */
- if (vlocation->upd_curr_svix == vlocation->cell->vl_curr_svix)
- vlocation->cell->vl_curr_svix =
- vlocation->cell->vl_curr_svix %
- vlocation->cell->vl_naddrs;
-
- case -EBADRQC:
- case -EINVAL:
- case -EACCES:
- case -EBADMSG:
- goto try_next;
-
- default:
- goto abandon;
- }
-
- /* try contacting the next server */
- try_next:
- vlocation->upd_busy_cnt = 0;
-
- /* discard the server record */
- afs_put_server(vlocation->upd_op.server);
- vlocation->upd_op.server = NULL;
+ _enter("");
- tmp = vlocation->cell->vl_naddrs;
- if (tmp == 0)
- goto abandon;
+ now = get_seconds();
- vlocation->upd_curr_svix++;
- if (vlocation->upd_curr_svix >= tmp)
- vlocation->upd_curr_svix = 0;
- if (vlocation->upd_first_svix >= tmp)
- vlocation->upd_first_svix = tmp - 1;
+ /* find a record to update */
+ spin_lock(&afs_vlocation_updates_lock);
+ for (;;) {
+ if (list_empty(&afs_vlocation_updates)) {
+ spin_unlock(&afs_vlocation_updates_lock);
+ _leave(" [nothing]");
+ return;
+ }
- /* move to the next server */
- if (vlocation->upd_curr_svix != vlocation->upd_first_svix) {
- afs_vlocation_update_begin(vlocation);
- _leave(" [next]");
- return;
+ vl = list_entry(afs_vlocation_updates.next,
+ struct afs_vlocation, update);
+ if (atomic_read(&vl->usage) > 0)
+ break;
+ list_del_init(&vl->update);
}
- /* run out of servers to try - was the volume rejected? */
- if (vlocation->upd_rej_cnt > 0) {
- printk("kAFS: Active volume no longer valid '%s'\n",
- vlocation->vldb.name);
- vlocation->valid = 0;
- afs_vlocation_update_abandon(vlocation, AFS_VLUPD_SLEEP, 0);
- afs_kafstimod_add_timer(&vlocation->upd_timer,
- AFS_VLDB_TIMEOUT);
- afs_put_vlocation(vlocation);
- _leave(" [invalidated]");
+ timeout = vl->update_at - now;
+ if (timeout > 0) {
+ queue_delayed_work(afs_vlocation_update_worker,
+ &afs_vlocation_update, timeout * HZ);
+ spin_unlock(&afs_vlocation_updates_lock);
+ _leave(" [nothing]");
return;
}
- /* abandon the update */
- abandon:
- afs_vlocation_update_abandon(vlocation, AFS_VLUPD_SLEEP, ret);
- afs_kafstimod_add_timer(&vlocation->upd_timer, HZ * 10);
- afs_put_vlocation(vlocation);
- _leave(" [abandoned]");
-
-} /* end afs_vlocation_update_attend() */
-
-/*****************************************************************************/
-/*
- * deal with an update operation being discarded
- * - called in kafsasyncd context when it's dying due to rmmod
- * - the call has already been aborted and put()'d
- */
-static void afs_vlocation_update_discard(struct afs_async_op *op)
-{
- struct afs_vlocation *vlocation =
- list_entry(op, struct afs_vlocation, upd_op);
+ list_del_init(&vl->update);
+ atomic_inc(&vl->usage);
+ spin_unlock(&afs_vlocation_updates_lock);
- _enter("%s", vlocation->vldb.name);
+ /* we can now perform the update */
+ _debug("update %s", vl->vldb.name);
+ vl->state = AFS_VL_UPDATING;
+ vl->upd_rej_cnt = 0;
+ vl->upd_busy_cnt = 0;
- afs_put_server(op->server);
- op->server = NULL;
+ ret = afs_vlocation_update_record(vl, NULL, &vldb);
+ spin_lock(&vl->lock);
+ switch (ret) {
+ case 0:
+ afs_vlocation_apply_update(vl, &vldb);
+ vl->state = AFS_VL_VALID;
+ break;
+ case -ENOMEDIUM:
+ vl->state = AFS_VL_VOLUME_DELETED;
+ break;
+ default:
+ vl->state = AFS_VL_UNCERTAIN;
+ break;
+ }
+ spin_unlock(&vl->lock);
+ wake_up(&vl->waitq);
- afs_put_vlocation(vlocation);
+ /* and then reschedule */
+ _debug("reschedule");
+ vl->update_at = get_seconds() + afs_vlocation_update_timeout;
- _leave("");
-} /* end afs_vlocation_update_discard() */
+ spin_lock(&afs_vlocation_updates_lock);
-/*****************************************************************************/
-/*
- * match a VLDB record stored in the cache
- * - may also load target from entry
- */
-#ifdef AFS_CACHING_SUPPORT
-static cachefs_match_val_t afs_vlocation_cache_match(void *target,
- const void *entry)
-{
- const struct afs_cache_vlocation *vldb = entry;
- struct afs_vlocation *vlocation = target;
-
- _enter("{%s},{%s}", vlocation->vldb.name, vldb->name);
-
- if (strncmp(vlocation->vldb.name, vldb->name, sizeof(vldb->name)) == 0
- ) {
- if (!vlocation->valid ||
- vlocation->vldb.rtime == vldb->rtime
- ) {
- vlocation->vldb = *vldb;
- vlocation->valid = 1;
- _leave(" = SUCCESS [c->m]");
- return CACHEFS_MATCH_SUCCESS;
- }
- /* need to update cache if cached info differs */
- else if (memcmp(&vlocation->vldb, vldb, sizeof(*vldb)) != 0) {
- /* delete if VIDs for this name differ */
- if (memcmp(&vlocation->vldb.vid,
- &vldb->vid,
- sizeof(vldb->vid)) != 0) {
- _leave(" = DELETE");
- return CACHEFS_MATCH_SUCCESS_DELETE;
- }
-
- _leave(" = UPDATE");
- return CACHEFS_MATCH_SUCCESS_UPDATE;
- }
- else {
- _leave(" = SUCCESS");
- return CACHEFS_MATCH_SUCCESS;
- }
+ if (!list_empty(&afs_vlocation_updates)) {
+ /* next update in 10 minutes, but wait at least 1 second more
+ * than the newest record already queued so that we don't spam
+ * the VL server suddenly with lots of requests
+ */
+ xvl = list_entry(afs_vlocation_updates.prev,
+ struct afs_vlocation, update);
+ if (vl->update_at <= xvl->update_at)
+ vl->update_at = xvl->update_at + 1;
+ xvl = list_entry(afs_vlocation_updates.next,
+ struct afs_vlocation, update);
+ timeout = xvl->update_at - now;
+ if (timeout < 0)
+ timeout = 0;
+ } else {
+ timeout = afs_vlocation_update_timeout;
}
- _leave(" = FAILED");
- return CACHEFS_MATCH_FAILED;
-} /* end afs_vlocation_cache_match() */
-#endif
-
-/*****************************************************************************/
-/*
- * update a VLDB record stored in the cache
- */
-#ifdef AFS_CACHING_SUPPORT
-static void afs_vlocation_cache_update(void *source, void *entry)
-{
- struct afs_cache_vlocation *vldb = entry;
- struct afs_vlocation *vlocation = source;
+ ASSERT(list_empty(&vl->update));
- _enter("");
-
- *vldb = vlocation->vldb;
+ list_add_tail(&vl->update, &afs_vlocation_updates);
-} /* end afs_vlocation_cache_update() */
-#endif
+ _debug("timeout %ld", timeout);
+ queue_delayed_work(afs_vlocation_update_worker,
+ &afs_vlocation_update, timeout * HZ);
+ spin_unlock(&afs_vlocation_updates_lock);
+ afs_put_vlocation(vl);
+}
diff --git a/fs/afs/vnode.c b/fs/afs/vnode.c
index cf62da5d782..a1904ab8426 100644
--- a/fs/afs/vnode.c
+++ b/fs/afs/vnode.c
@@ -1,6 +1,6 @@
-/* vnode.c: AFS vnode management
+/* AFS vnode management
*
- * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
+ * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
@@ -14,142 +14,237 @@
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/fs.h>
-#include <linux/pagemap.h>
-#include "volume.h"
-#include "cell.h"
-#include "cmservice.h"
-#include "fsclient.h"
-#include "vlclient.h"
-#include "vnode.h"
#include "internal.h"
-static void afs_vnode_cb_timed_out(struct afs_timer *timer);
+#if 0
+static noinline bool dump_tree_aux(struct rb_node *node, struct rb_node *parent,
+ int depth, char lr)
+{
+ struct afs_vnode *vnode;
+ bool bad = false;
+
+ if (!node)
+ return false;
+
+ if (node->rb_left)
+ bad = dump_tree_aux(node->rb_left, node, depth + 2, '/');
+
+ vnode = rb_entry(node, struct afs_vnode, cb_promise);
+ _debug("%c %*.*s%c%p {%d}",
+ rb_is_red(node) ? 'R' : 'B',
+ depth, depth, "", lr,
+ vnode, vnode->cb_expires_at);
+ if (rb_parent(node) != parent) {
+ printk("BAD: %p != %p\n", rb_parent(node), parent);
+ bad = true;
+ }
-struct afs_timer_ops afs_vnode_cb_timed_out_ops = {
- .timed_out = afs_vnode_cb_timed_out,
-};
+ if (node->rb_right)
+ bad |= dump_tree_aux(node->rb_right, node, depth + 2, '\\');
-#ifdef AFS_CACHING_SUPPORT
-static cachefs_match_val_t afs_vnode_cache_match(void *target,
- const void *entry);
-static void afs_vnode_cache_update(void *source, void *entry);
+ return bad;
+}
-struct cachefs_index_def afs_vnode_cache_index_def = {
- .name = "vnode",
- .data_size = sizeof(struct afs_cache_vnode),
- .keys[0] = { CACHEFS_INDEX_KEYS_BIN, 4 },
- .match = afs_vnode_cache_match,
- .update = afs_vnode_cache_update,
-};
+static noinline void dump_tree(const char *name, struct afs_server *server)
+{
+ _enter("%s", name);
+ if (dump_tree_aux(server->cb_promises.rb_node, NULL, 0, '-'))
+ BUG();
+}
#endif
-/*****************************************************************************/
/*
- * handle a callback timing out
- * TODO: retain a ref to vnode struct for an outstanding callback timeout
+ * insert a vnode into the backing server's vnode tree
*/
-static void afs_vnode_cb_timed_out(struct afs_timer *timer)
+static void afs_install_vnode(struct afs_vnode *vnode,
+ struct afs_server *server)
{
- struct afs_server *oldserver;
- struct afs_vnode *vnode;
+ struct afs_server *old_server = vnode->server;
+ struct afs_vnode *xvnode;
+ struct rb_node *parent, **p;
- vnode = list_entry(timer, struct afs_vnode, cb_timeout);
+ _enter("%p,%p", vnode, server);
- _enter("%p", vnode);
+ if (old_server) {
+ spin_lock(&old_server->fs_lock);
+ rb_erase(&vnode->server_rb, &old_server->fs_vnodes);
+ spin_unlock(&old_server->fs_lock);
+ }
- /* set the changed flag in the vnode and release the server */
- spin_lock(&vnode->lock);
+ afs_get_server(server);
+ vnode->server = server;
+ afs_put_server(old_server);
+
+ /* insert into the server's vnode tree in FID order */
+ spin_lock(&server->fs_lock);
+
+ parent = NULL;
+ p = &server->fs_vnodes.rb_node;
+ while (*p) {
+ parent = *p;
+ xvnode = rb_entry(parent, struct afs_vnode, server_rb);
+ if (vnode->fid.vid < xvnode->fid.vid)
+ p = &(*p)->rb_left;
+ else if (vnode->fid.vid > xvnode->fid.vid)
+ p = &(*p)->rb_right;
+ else if (vnode->fid.vnode < xvnode->fid.vnode)
+ p = &(*p)->rb_left;
+ else if (vnode->fid.vnode > xvnode->fid.vnode)
+ p = &(*p)->rb_right;
+ else if (vnode->fid.unique < xvnode->fid.unique)
+ p = &(*p)->rb_left;
+ else if (vnode->fid.unique > xvnode->fid.unique)
+ p = &(*p)->rb_right;
+ else
+ BUG(); /* can't happen unless afs_iget() malfunctions */
+ }
+
+ rb_link_node(&vnode->server_rb, parent, p);
+ rb_insert_color(&vnode->server_rb, &server->fs_vnodes);
- oldserver = xchg(&vnode->cb_server, NULL);
- if (oldserver) {
- vnode->flags |= AFS_VNODE_CHANGED;
+ spin_unlock(&server->fs_lock);
+ _leave("");
+}
- spin_lock(&afs_cb_hash_lock);
- list_del_init(&vnode->cb_hash_link);
- spin_unlock(&afs_cb_hash_lock);
+/*
+ * insert a vnode into the promising server's update/expiration tree
+ * - caller must hold vnode->lock
+ */
+static void afs_vnode_note_promise(struct afs_vnode *vnode,
+ struct afs_server *server)
+{
+ struct afs_server *old_server;
+ struct afs_vnode *xvnode;
+ struct rb_node *parent, **p;
- spin_lock(&oldserver->cb_lock);
- list_del_init(&vnode->cb_link);
- spin_unlock(&oldserver->cb_lock);
+ _enter("%p,%p", vnode, server);
+
+ ASSERT(server != NULL);
+
+ old_server = vnode->server;
+ if (vnode->cb_promised) {
+ if (server == old_server &&
+ vnode->cb_expires == vnode->cb_expires_at) {
+ _leave(" [no change]");
+ return;
+ }
+
+ spin_lock(&old_server->cb_lock);
+ if (vnode->cb_promised) {
+ _debug("delete");
+ rb_erase(&vnode->cb_promise, &old_server->cb_promises);
+ vnode->cb_promised = false;
+ }
+ spin_unlock(&old_server->cb_lock);
}
- spin_unlock(&vnode->lock);
+ if (vnode->server != server)
+ afs_install_vnode(vnode, server);
+
+ vnode->cb_expires_at = vnode->cb_expires;
+ _debug("PROMISE on %p {%lu}",
+ vnode, (unsigned long) vnode->cb_expires_at);
+
+ /* abuse an RB-tree to hold the expiration order (we may have multiple
+ * items with the same expiration time) */
+ spin_lock(&server->cb_lock);
+
+ parent = NULL;
+ p = &server->cb_promises.rb_node;
+ while (*p) {
+ parent = *p;
+ xvnode = rb_entry(parent, struct afs_vnode, cb_promise);
+ if (vnode->cb_expires_at < xvnode->cb_expires_at)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
+ }
- afs_put_server(oldserver);
+ rb_link_node(&vnode->cb_promise, parent, p);
+ rb_insert_color(&vnode->cb_promise, &server->cb_promises);
+ vnode->cb_promised = true;
+ spin_unlock(&server->cb_lock);
_leave("");
-} /* end afs_vnode_cb_timed_out() */
+}
-/*****************************************************************************/
/*
- * finish off updating the recorded status of a file
+ * handle remote file deletion by discarding the callback promise
+ */
+static void afs_vnode_deleted_remotely(struct afs_vnode *vnode)
+{
+ struct afs_server *server;
+
+ set_bit(AFS_VNODE_DELETED, &vnode->flags);
+
+ server = vnode->server;
+ if (vnode->cb_promised) {
+ spin_lock(&server->cb_lock);
+ if (vnode->cb_promised) {
+ rb_erase(&vnode->cb_promise, &server->cb_promises);
+ vnode->cb_promised = false;
+ }
+ spin_unlock(&server->cb_lock);
+ }
+
+ spin_lock(&vnode->server->fs_lock);
+ rb_erase(&vnode->server_rb, &vnode->server->fs_vnodes);
+ spin_unlock(&vnode->server->fs_lock);
+
+ vnode->server = NULL;
+ afs_put_server(server);
+}
+
+/*
+ * finish off updating the recorded status of a file after a successful
+ * operation completion
* - starts callback expiry timer
* - adds to server's callback list
*/
-static void afs_vnode_finalise_status_update(struct afs_vnode *vnode,
- struct afs_server *server,
- int ret)
+void afs_vnode_finalise_status_update(struct afs_vnode *vnode,
+ struct afs_server *server)
{
struct afs_server *oldserver = NULL;
- _enter("%p,%p,%d", vnode, server, ret);
+ _enter("%p,%p", vnode, server);
spin_lock(&vnode->lock);
+ clear_bit(AFS_VNODE_CB_BROKEN, &vnode->flags);
+ afs_vnode_note_promise(vnode, server);
+ vnode->update_cnt--;
+ ASSERTCMP(vnode->update_cnt, >=, 0);
+ spin_unlock(&vnode->lock);
+
+ wake_up_all(&vnode->update_waitq);
+ afs_put_server(oldserver);
+ _leave("");
+}
- vnode->flags &= ~AFS_VNODE_CHANGED;
+/*
+ * finish off updating the recorded status of a file after an operation failed
+ */
+static void afs_vnode_status_update_failed(struct afs_vnode *vnode, int ret)
+{
+ _enter("%p,%d", vnode, ret);
- if (ret == 0) {
- /* adjust the callback timeout appropriately */
- afs_kafstimod_add_timer(&vnode->cb_timeout,
- vnode->cb_expiry * HZ);
-
- spin_lock(&afs_cb_hash_lock);
- list_move_tail(&vnode->cb_hash_link,
- &afs_cb_hash(server, &vnode->fid));
- spin_unlock(&afs_cb_hash_lock);
-
- /* swap ref to old callback server with that for new callback
- * server */
- oldserver = xchg(&vnode->cb_server, server);
- if (oldserver != server) {
- if (oldserver) {
- spin_lock(&oldserver->cb_lock);
- list_del_init(&vnode->cb_link);
- spin_unlock(&oldserver->cb_lock);
- }
+ spin_lock(&vnode->lock);
- afs_get_server(server);
- spin_lock(&server->cb_lock);
- list_add_tail(&vnode->cb_link, &server->cb_promises);
- spin_unlock(&server->cb_lock);
- }
- else {
- /* same server */
- oldserver = NULL;
- }
- }
- else if (ret == -ENOENT) {
- /* the file was deleted - clear the callback timeout */
- oldserver = xchg(&vnode->cb_server, NULL);
- afs_kafstimod_del_timer(&vnode->cb_timeout);
+ clear_bit(AFS_VNODE_CB_BROKEN, &vnode->flags);
+ if (ret == -ENOENT) {
+ /* the file was deleted on the server */
_debug("got NOENT from server - marking file deleted");
- vnode->flags |= AFS_VNODE_DELETED;
+ afs_vnode_deleted_remotely(vnode);
}
vnode->update_cnt--;
-
+ ASSERTCMP(vnode->update_cnt, >=, 0);
spin_unlock(&vnode->lock);
wake_up_all(&vnode->update_waitq);
-
- afs_put_server(oldserver);
-
_leave("");
+}
-} /* end afs_vnode_finalise_status_update() */
-
-/*****************************************************************************/
/*
* fetch file status from the volume
* - don't issue a fetch if:
@@ -157,9 +252,11 @@ static void afs_vnode_finalise_status_update(struct afs_vnode *vnode,
* - there are any outstanding ops that will fetch the status
* - TODO implement local caching
*/
-int afs_vnode_fetch_status(struct afs_vnode *vnode)
+int afs_vnode_fetch_status(struct afs_vnode *vnode,
+ struct afs_vnode *auth_vnode, struct key *key)
{
struct afs_server *server;
+ unsigned long acl_order;
int ret;
DECLARE_WAITQUEUE(myself, current);
@@ -168,38 +265,49 @@ int afs_vnode_fetch_status(struct afs_vnode *vnode)
vnode->volume->vlocation->vldb.name,
vnode->fid.vid, vnode->fid.vnode, vnode->fid.unique);
- if (!(vnode->flags & AFS_VNODE_CHANGED) && vnode->cb_server) {
+ if (!test_bit(AFS_VNODE_CB_BROKEN, &vnode->flags) &&
+ vnode->cb_promised) {
_leave(" [unchanged]");
return 0;
}
- if (vnode->flags & AFS_VNODE_DELETED) {
+ if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) {
_leave(" [deleted]");
return -ENOENT;
}
+ acl_order = 0;
+ if (auth_vnode)
+ acl_order = auth_vnode->acl_order;
+
spin_lock(&vnode->lock);
- if (!(vnode->flags & AFS_VNODE_CHANGED)) {
+ if (!test_bit(AFS_VNODE_CB_BROKEN, &vnode->flags) &&
+ vnode->cb_promised) {
spin_unlock(&vnode->lock);
_leave(" [unchanged]");
return 0;
}
+ ASSERTCMP(vnode->update_cnt, >=, 0);
+
if (vnode->update_cnt > 0) {
/* someone else started a fetch */
+ _debug("wait on fetch %d", vnode->update_cnt);
+
set_current_state(TASK_UNINTERRUPTIBLE);
+ ASSERT(myself.func != NULL);
add_wait_queue(&vnode->update_waitq, &myself);
/* wait for the status to be updated */
for (;;) {
- if (!(vnode->flags & AFS_VNODE_CHANGED))
+ if (!test_bit(AFS_VNODE_CB_BROKEN, &vnode->flags))
break;
- if (vnode->flags & AFS_VNODE_DELETED)
+ if (test_bit(AFS_VNODE_DELETED, &vnode->flags))
break;
- /* it got updated and invalidated all before we saw
- * it */
+ /* check to see if it got updated and invalidated all
+ * before we saw it */
if (vnode->update_cnt == 0) {
remove_wait_queue(&vnode->update_waitq,
&myself);
@@ -219,10 +327,11 @@ int afs_vnode_fetch_status(struct afs_vnode *vnode)
spin_unlock(&vnode->lock);
set_current_state(TASK_RUNNING);
- return vnode->flags & AFS_VNODE_DELETED ? -ENOENT : 0;
+ return test_bit(AFS_VNODE_DELETED, &vnode->flags) ?
+ -ENOENT : 0;
}
- get_anyway:
+get_anyway:
/* okay... we're going to have to initiate the op */
vnode->update_cnt++;
@@ -232,39 +341,60 @@ int afs_vnode_fetch_status(struct afs_vnode *vnode)
* vnode */
do {
/* pick a server to query */
- ret = afs_volume_pick_fileserver(vnode->volume, &server);
- if (ret<0)
- return ret;
+ server = afs_volume_pick_fileserver(vnode);
+ if (IS_ERR(server))
+ goto no_server;
- _debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr));
+ _debug("USING SERVER: %p{%08x}",
+ server, ntohl(server->addr.s_addr));
- ret = afs_rxfs_fetch_file_status(server, vnode, NULL);
+ ret = afs_fs_fetch_file_status(server, key, vnode, NULL,
+ &afs_sync_call);
- } while (!afs_volume_release_fileserver(vnode->volume, server, ret));
+ } while (!afs_volume_release_fileserver(vnode, server, ret));
/* adjust the flags */
- afs_vnode_finalise_status_update(vnode, server, ret);
+ if (ret == 0) {
+ _debug("adjust");
+ if (auth_vnode)
+ afs_cache_permit(vnode, key, acl_order);
+ afs_vnode_finalise_status_update(vnode, server);
+ afs_put_server(server);
+ } else {
+ _debug("failed [%d]", ret);
+ afs_vnode_status_update_failed(vnode, ret);
+ }
- _leave(" = %d", ret);
+ ASSERTCMP(vnode->update_cnt, >=, 0);
+
+ _leave(" = %d [cnt %d]", ret, vnode->update_cnt);
return ret;
-} /* end afs_vnode_fetch_status() */
-/*****************************************************************************/
+no_server:
+ spin_lock(&vnode->lock);
+ vnode->update_cnt--;
+ ASSERTCMP(vnode->update_cnt, >=, 0);
+ spin_unlock(&vnode->lock);
+ _leave(" = %ld [cnt %d]", PTR_ERR(server), vnode->update_cnt);
+ return PTR_ERR(server);
+}
+
/*
* fetch file data from the volume
- * - TODO implement caching and server failover
+ * - TODO implement caching
*/
-int afs_vnode_fetch_data(struct afs_vnode *vnode,
- struct afs_rxfs_fetch_descriptor *desc)
+int afs_vnode_fetch_data(struct afs_vnode *vnode, struct key *key,
+ off_t offset, size_t length, struct page *page)
{
struct afs_server *server;
int ret;
- _enter("%s,{%u,%u,%u}",
+ _enter("%s{%u,%u,%u},%x,,,",
vnode->volume->vlocation->vldb.name,
vnode->fid.vid,
vnode->fid.vnode,
- vnode->fid.unique);
+ vnode->fid.unique,
+ key_serial(key));
/* this op will fetch the status */
spin_lock(&vnode->lock);
@@ -275,120 +405,351 @@ int afs_vnode_fetch_data(struct afs_vnode *vnode,
* vnode */
do {
/* pick a server to query */
- ret = afs_volume_pick_fileserver(vnode->volume, &server);
- if (ret < 0)
- return ret;
+ server = afs_volume_pick_fileserver(vnode);
+ if (IS_ERR(server))
+ goto no_server;
_debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr));
- ret = afs_rxfs_fetch_file_data(server, vnode, desc, NULL);
+ ret = afs_fs_fetch_data(server, key, vnode, offset, length,
+ page, &afs_sync_call);
- } while (!afs_volume_release_fileserver(vnode->volume, server, ret));
+ } while (!afs_volume_release_fileserver(vnode, server, ret));
/* adjust the flags */
- afs_vnode_finalise_status_update(vnode, server, ret);
+ if (ret == 0) {
+ afs_vnode_finalise_status_update(vnode, server);
+ afs_put_server(server);
+ } else {
+ afs_vnode_status_update_failed(vnode, ret);
+ }
_leave(" = %d", ret);
return ret;
-} /* end afs_vnode_fetch_data() */
+no_server:
+ spin_lock(&vnode->lock);
+ vnode->update_cnt--;
+ ASSERTCMP(vnode->update_cnt, >=, 0);
+ spin_unlock(&vnode->lock);
+ return PTR_ERR(server);
+}
-/*****************************************************************************/
/*
- * break any outstanding callback on a vnode
- * - only relevent to server that issued it
+ * make a file or a directory
*/
-int afs_vnode_give_up_callback(struct afs_vnode *vnode)
+int afs_vnode_create(struct afs_vnode *vnode, struct key *key,
+ const char *name, umode_t mode, struct afs_fid *newfid,
+ struct afs_file_status *newstatus,
+ struct afs_callback *newcb, struct afs_server **_server)
{
struct afs_server *server;
int ret;
- _enter("%s,{%u,%u,%u}",
+ _enter("%s{%u,%u,%u},%x,%s,,",
vnode->volume->vlocation->vldb.name,
vnode->fid.vid,
vnode->fid.vnode,
- vnode->fid.unique);
-
- spin_lock(&afs_cb_hash_lock);
- list_del_init(&vnode->cb_hash_link);
- spin_unlock(&afs_cb_hash_lock);
+ vnode->fid.unique,
+ key_serial(key),
+ name);
- /* set the changed flag in the vnode and release the server */
+ /* this op will fetch the status on the directory we're creating in */
spin_lock(&vnode->lock);
+ vnode->update_cnt++;
+ spin_unlock(&vnode->lock);
- afs_kafstimod_del_timer(&vnode->cb_timeout);
+ do {
+ /* pick a server to query */
+ server = afs_volume_pick_fileserver(vnode);
+ if (IS_ERR(server))
+ goto no_server;
+
+ _debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr));
- server = xchg(&vnode->cb_server, NULL);
- if (server) {
- vnode->flags |= AFS_VNODE_CHANGED;
+ ret = afs_fs_create(server, key, vnode, name, mode, newfid,
+ newstatus, newcb, &afs_sync_call);
- spin_lock(&server->cb_lock);
- list_del_init(&vnode->cb_link);
- spin_unlock(&server->cb_lock);
+ } while (!afs_volume_release_fileserver(vnode, server, ret));
+
+ /* adjust the flags */
+ if (ret == 0) {
+ afs_vnode_finalise_status_update(vnode, server);
+ *_server = server;
+ } else {
+ afs_vnode_status_update_failed(vnode, ret);
+ *_server = NULL;
}
+ _leave(" = %d [cnt %d]", ret, vnode->update_cnt);
+ return ret;
+
+no_server:
+ spin_lock(&vnode->lock);
+ vnode->update_cnt--;
+ ASSERTCMP(vnode->update_cnt, >=, 0);
spin_unlock(&vnode->lock);
+ _leave(" = %ld [cnt %d]", PTR_ERR(server), vnode->update_cnt);
+ return PTR_ERR(server);
+}
- ret = 0;
- if (server) {
- ret = afs_rxfs_give_up_callback(server, vnode);
+/*
+ * remove a file or directory
+ */
+int afs_vnode_remove(struct afs_vnode *vnode, struct key *key, const char *name,
+ bool isdir)
+{
+ struct afs_server *server;
+ int ret;
+
+ _enter("%s{%u,%u,%u},%x,%s",
+ vnode->volume->vlocation->vldb.name,
+ vnode->fid.vid,
+ vnode->fid.vnode,
+ vnode->fid.unique,
+ key_serial(key),
+ name);
+
+ /* this op will fetch the status on the directory we're removing from */
+ spin_lock(&vnode->lock);
+ vnode->update_cnt++;
+ spin_unlock(&vnode->lock);
+
+ do {
+ /* pick a server to query */
+ server = afs_volume_pick_fileserver(vnode);
+ if (IS_ERR(server))
+ goto no_server;
+
+ _debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr));
+
+ ret = afs_fs_remove(server, key, vnode, name, isdir,
+ &afs_sync_call);
+
+ } while (!afs_volume_release_fileserver(vnode, server, ret));
+
+ /* adjust the flags */
+ if (ret == 0) {
+ afs_vnode_finalise_status_update(vnode, server);
afs_put_server(server);
+ } else {
+ afs_vnode_status_update_failed(vnode, ret);
}
- _leave(" = %d", ret);
+ _leave(" = %d [cnt %d]", ret, vnode->update_cnt);
return ret;
-} /* end afs_vnode_give_up_callback() */
-/*****************************************************************************/
+no_server:
+ spin_lock(&vnode->lock);
+ vnode->update_cnt--;
+ ASSERTCMP(vnode->update_cnt, >=, 0);
+ spin_unlock(&vnode->lock);
+ _leave(" = %ld [cnt %d]", PTR_ERR(server), vnode->update_cnt);
+ return PTR_ERR(server);
+}
+
/*
- * match a vnode record stored in the cache
+ * create a hard link
*/
-#ifdef AFS_CACHING_SUPPORT
-static cachefs_match_val_t afs_vnode_cache_match(void *target,
- const void *entry)
+extern int afs_vnode_link(struct afs_vnode *dvnode, struct afs_vnode *vnode,
+ struct key *key, const char *name)
{
- const struct afs_cache_vnode *cvnode = entry;
- struct afs_vnode *vnode = target;
+ struct afs_server *server;
+ int ret;
- _enter("{%x,%x,%Lx},{%x,%x,%Lx}",
+ _enter("%s{%u,%u,%u},%s{%u,%u,%u},%x,%s",
+ dvnode->volume->vlocation->vldb.name,
+ dvnode->fid.vid,
+ dvnode->fid.vnode,
+ dvnode->fid.unique,
+ vnode->volume->vlocation->vldb.name,
+ vnode->fid.vid,
vnode->fid.vnode,
vnode->fid.unique,
- vnode->status.version,
- cvnode->vnode_id,
- cvnode->vnode_unique,
- cvnode->data_version);
-
- if (vnode->fid.vnode != cvnode->vnode_id) {
- _leave(" = FAILED");
- return CACHEFS_MATCH_FAILED;
+ key_serial(key),
+ name);
+
+ /* this op will fetch the status on the directory we're removing from */
+ spin_lock(&vnode->lock);
+ vnode->update_cnt++;
+ spin_unlock(&vnode->lock);
+ spin_lock(&dvnode->lock);
+ dvnode->update_cnt++;
+ spin_unlock(&dvnode->lock);
+
+ do {
+ /* pick a server to query */
+ server = afs_volume_pick_fileserver(dvnode);
+ if (IS_ERR(server))
+ goto no_server;
+
+ _debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr));
+
+ ret = afs_fs_link(server, key, dvnode, vnode, name,
+ &afs_sync_call);
+
+ } while (!afs_volume_release_fileserver(dvnode, server, ret));
+
+ /* adjust the flags */
+ if (ret == 0) {
+ afs_vnode_finalise_status_update(vnode, server);
+ afs_vnode_finalise_status_update(dvnode, server);
+ afs_put_server(server);
+ } else {
+ afs_vnode_status_update_failed(vnode, ret);
+ afs_vnode_status_update_failed(dvnode, ret);
}
- if (vnode->fid.unique != cvnode->vnode_unique ||
- vnode->status.version != cvnode->data_version) {
- _leave(" = DELETE");
- return CACHEFS_MATCH_SUCCESS_DELETE;
+ _leave(" = %d [cnt %d]", ret, vnode->update_cnt);
+ return ret;
+
+no_server:
+ spin_lock(&vnode->lock);
+ vnode->update_cnt--;
+ ASSERTCMP(vnode->update_cnt, >=, 0);
+ spin_unlock(&vnode->lock);
+ spin_lock(&dvnode->lock);
+ dvnode->update_cnt--;
+ ASSERTCMP(dvnode->update_cnt, >=, 0);
+ spin_unlock(&dvnode->lock);
+ _leave(" = %ld [cnt %d]", PTR_ERR(server), vnode->update_cnt);
+ return PTR_ERR(server);
+}
+
+/*
+ * create a symbolic link
+ */
+int afs_vnode_symlink(struct afs_vnode *vnode, struct key *key,
+ const char *name, const char *content,
+ struct afs_fid *newfid,
+ struct afs_file_status *newstatus,
+ struct afs_server **_server)
+{
+ struct afs_server *server;
+ int ret;
+
+ _enter("%s{%u,%u,%u},%x,%s,%s,,,",
+ vnode->volume->vlocation->vldb.name,
+ vnode->fid.vid,
+ vnode->fid.vnode,
+ vnode->fid.unique,
+ key_serial(key),
+ name, content);
+
+ /* this op will fetch the status on the directory we're creating in */
+ spin_lock(&vnode->lock);
+ vnode->update_cnt++;
+ spin_unlock(&vnode->lock);
+
+ do {
+ /* pick a server to query */
+ server = afs_volume_pick_fileserver(vnode);
+ if (IS_ERR(server))
+ goto no_server;
+
+ _debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr));
+
+ ret = afs_fs_symlink(server, key, vnode, name, content,
+ newfid, newstatus, &afs_sync_call);
+
+ } while (!afs_volume_release_fileserver(vnode, server, ret));
+
+ /* adjust the flags */
+ if (ret == 0) {
+ afs_vnode_finalise_status_update(vnode, server);
+ *_server = server;
+ } else {
+ afs_vnode_status_update_failed(vnode, ret);
+ *_server = NULL;
}
- _leave(" = SUCCESS");
- return CACHEFS_MATCH_SUCCESS;
-} /* end afs_vnode_cache_match() */
-#endif
+ _leave(" = %d [cnt %d]", ret, vnode->update_cnt);
+ return ret;
+
+no_server:
+ spin_lock(&vnode->lock);
+ vnode->update_cnt--;
+ ASSERTCMP(vnode->update_cnt, >=, 0);
+ spin_unlock(&vnode->lock);
+ _leave(" = %ld [cnt %d]", PTR_ERR(server), vnode->update_cnt);
+ return PTR_ERR(server);
+}
-/*****************************************************************************/
/*
- * update a vnode record stored in the cache
+ * rename a file
*/
-#ifdef AFS_CACHING_SUPPORT
-static void afs_vnode_cache_update(void *source, void *entry)
+int afs_vnode_rename(struct afs_vnode *orig_dvnode,
+ struct afs_vnode *new_dvnode,
+ struct key *key,
+ const char *orig_name,
+ const char *new_name)
{
- struct afs_cache_vnode *cvnode = entry;
- struct afs_vnode *vnode = source;
+ struct afs_server *server;
+ int ret;
- _enter("");
+ _enter("%s{%u,%u,%u},%s{%u,%u,%u},%x,%s,%s",
+ orig_dvnode->volume->vlocation->vldb.name,
+ orig_dvnode->fid.vid,
+ orig_dvnode->fid.vnode,
+ orig_dvnode->fid.unique,
+ new_dvnode->volume->vlocation->vldb.name,
+ new_dvnode->fid.vid,
+ new_dvnode->fid.vnode,
+ new_dvnode->fid.unique,
+ key_serial(key),
+ orig_name,
+ new_name);
+
+ /* this op will fetch the status on both the directories we're dealing
+ * with */
+ spin_lock(&orig_dvnode->lock);
+ orig_dvnode->update_cnt++;
+ spin_unlock(&orig_dvnode->lock);
+ if (new_dvnode != orig_dvnode) {
+ spin_lock(&new_dvnode->lock);
+ new_dvnode->update_cnt++;
+ spin_unlock(&new_dvnode->lock);
+ }
- cvnode->vnode_id = vnode->fid.vnode;
- cvnode->vnode_unique = vnode->fid.unique;
- cvnode->data_version = vnode->status.version;
+ do {
+ /* pick a server to query */
+ server = afs_volume_pick_fileserver(orig_dvnode);
+ if (IS_ERR(server))
+ goto no_server;
-} /* end afs_vnode_cache_update() */
-#endif
+ _debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr));
+
+ ret = afs_fs_rename(server, key, orig_dvnode, orig_name,
+ new_dvnode, new_name, &afs_sync_call);
+
+ } while (!afs_volume_release_fileserver(orig_dvnode, server, ret));
+
+ /* adjust the flags */
+ if (ret == 0) {
+ afs_vnode_finalise_status_update(orig_dvnode, server);
+ if (new_dvnode != orig_dvnode)
+ afs_vnode_finalise_status_update(new_dvnode, server);
+ afs_put_server(server);
+ } else {
+ afs_vnode_status_update_failed(orig_dvnode, ret);
+ if (new_dvnode != orig_dvnode)
+ afs_vnode_status_update_failed(new_dvnode, ret);
+ }
+
+ _leave(" = %d [cnt %d]", ret, orig_dvnode->update_cnt);
+ return ret;
+
+no_server:
+ spin_lock(&orig_dvnode->lock);
+ orig_dvnode->update_cnt--;
+ ASSERTCMP(orig_dvnode->update_cnt, >=, 0);
+ spin_unlock(&orig_dvnode->lock);
+ if (new_dvnode != orig_dvnode) {
+ spin_lock(&new_dvnode->lock);
+ new_dvnode->update_cnt--;
+ ASSERTCMP(new_dvnode->update_cnt, >=, 0);
+ spin_unlock(&new_dvnode->lock);
+ }
+ _leave(" = %ld [cnt %d]", PTR_ERR(server), orig_dvnode->update_cnt);
+ return PTR_ERR(server);
+}
diff --git a/fs/afs/vnode.h b/fs/afs/vnode.h
deleted file mode 100644
index b86a97102e8..00000000000
--- a/fs/afs/vnode.h
+++ /dev/null
@@ -1,94 +0,0 @@
-/* vnode.h: AFS vnode record
- *
- * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#ifndef _LINUX_AFS_VNODE_H
-#define _LINUX_AFS_VNODE_H
-
-#include <linux/fs.h>
-#include "server.h"
-#include "kafstimod.h"
-#include "cache.h"
-
-#ifdef __KERNEL__
-
-struct afs_rxfs_fetch_descriptor;
-
-/*****************************************************************************/
-/*
- * vnode catalogue entry
- */
-struct afs_cache_vnode
-{
- afs_vnodeid_t vnode_id; /* vnode ID */
- unsigned vnode_unique; /* vnode ID uniquifier */
- afs_dataversion_t data_version; /* data version */
-};
-
-#ifdef AFS_CACHING_SUPPORT
-extern struct cachefs_index_def afs_vnode_cache_index_def;
-#endif
-
-/*****************************************************************************/
-/*
- * AFS inode private data
- */
-struct afs_vnode
-{
- struct inode vfs_inode; /* the VFS's inode record */
-
- struct afs_volume *volume; /* volume on which vnode resides */
- struct afs_fid fid; /* the file identifier for this inode */
- struct afs_file_status status; /* AFS status info for this file */
-#ifdef AFS_CACHING_SUPPORT
- struct cachefs_cookie *cache; /* caching cookie */
-#endif
-
- wait_queue_head_t update_waitq; /* status fetch waitqueue */
- unsigned update_cnt; /* number of outstanding ops that will update the
- * status */
- spinlock_t lock; /* waitqueue/flags lock */
- unsigned flags;
-#define AFS_VNODE_CHANGED 0x00000001 /* set if vnode reported changed by callback */
-#define AFS_VNODE_DELETED 0x00000002 /* set if vnode deleted on server */
-#define AFS_VNODE_MOUNTPOINT 0x00000004 /* set if vnode is a mountpoint symlink */
-
- /* outstanding callback notification on this file */
- struct afs_server *cb_server; /* server that made the current promise */
- struct list_head cb_link; /* link in server's promises list */
- struct list_head cb_hash_link; /* link in master callback hash */
- struct afs_timer cb_timeout; /* timeout on promise */
- unsigned cb_version; /* callback version */
- unsigned cb_expiry; /* callback expiry time */
- afs_callback_type_t cb_type; /* type of callback */
-};
-
-static inline struct afs_vnode *AFS_FS_I(struct inode *inode)
-{
- return container_of(inode,struct afs_vnode,vfs_inode);
-}
-
-static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode)
-{
- return &vnode->vfs_inode;
-}
-
-extern int afs_vnode_fetch_status(struct afs_vnode *vnode);
-
-extern int afs_vnode_fetch_data(struct afs_vnode *vnode,
- struct afs_rxfs_fetch_descriptor *desc);
-
-extern int afs_vnode_give_up_callback(struct afs_vnode *vnode);
-
-extern struct afs_timer_ops afs_vnode_cb_timed_out_ops;
-
-#endif /* __KERNEL__ */
-
-#endif /* _LINUX_AFS_VNODE_H */
diff --git a/fs/afs/volume.c b/fs/afs/volume.c
index 768c6dbd323..dd160cada45 100644
--- a/fs/afs/volume.c
+++ b/fs/afs/volume.c
@@ -1,6 +1,6 @@
-/* volume.c: AFS volume management
+/* AFS volume management
*
- * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
+ * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
@@ -15,35 +15,10 @@
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/pagemap.h>
-#include "volume.h"
-#include "vnode.h"
-#include "cell.h"
-#include "cache.h"
-#include "cmservice.h"
-#include "fsclient.h"
-#include "vlclient.h"
#include "internal.h"
-#ifdef __KDEBUG
static const char *afs_voltypes[] = { "R/W", "R/O", "BAK" };
-#endif
-
-#ifdef AFS_CACHING_SUPPORT
-static cachefs_match_val_t afs_volume_cache_match(void *target,
- const void *entry);
-static void afs_volume_cache_update(void *source, void *entry);
-
-struct cachefs_index_def afs_volume_cache_index_def = {
- .name = "volume",
- .data_size = sizeof(struct afs_cache_vhash),
- .keys[0] = { CACHEFS_INDEX_KEYS_BIN, 1 },
- .keys[1] = { CACHEFS_INDEX_KEYS_BIN, 1 },
- .match = afs_volume_cache_match,
- .update = afs_volume_cache_update,
-};
-#endif
-/*****************************************************************************/
/*
* lookup a volume by name
* - this can be one of the following:
@@ -66,118 +41,52 @@ struct cachefs_index_def afs_volume_cache_index_def = {
* - Rule 3: If parent volume is R/W, then only mount R/W volume unless
* explicitly told otherwise
*/
-int afs_volume_lookup(const char *name, struct afs_cell *cell, int rwpath,
- struct afs_volume **_volume)
+struct afs_volume *afs_volume_lookup(struct afs_mount_params *params)
{
struct afs_vlocation *vlocation = NULL;
struct afs_volume *volume = NULL;
- afs_voltype_t type;
- const char *cellname, *volname, *suffix;
+ struct afs_server *server = NULL;
char srvtmask;
- int force, ret, loop, cellnamesz, volnamesz;
-
- _enter("%s,,%d,", name, rwpath);
-
- if (!name || (name[0] != '%' && name[0] != '#') || !name[1]) {
- printk("kAFS: unparsable volume name\n");
- return -EINVAL;
- }
-
- /* determine the type of volume we're looking for */
- force = 0;
- type = AFSVL_ROVOL;
-
- if (rwpath || name[0] == '%') {
- type = AFSVL_RWVOL;
- force = 1;
- }
-
- suffix = strrchr(name, '.');
- if (suffix) {
- if (strcmp(suffix, ".readonly") == 0) {
- type = AFSVL_ROVOL;
- force = 1;
- }
- else if (strcmp(suffix, ".backup") == 0) {
- type = AFSVL_BACKVOL;
- force = 1;
- }
- else if (suffix[1] == 0) {
- }
- else {
- suffix = NULL;
- }
- }
+ int ret, loop;
- /* split the cell and volume names */
- name++;
- volname = strchr(name, ':');
- if (volname) {
- cellname = name;
- cellnamesz = volname - name;
- volname++;
- }
- else {
- volname = name;
- cellname = NULL;
- cellnamesz = 0;
- }
-
- volnamesz = suffix ? suffix - volname : strlen(volname);
-
- _debug("CELL:%*.*s [%p] VOLUME:%*.*s SUFFIX:%s TYPE:%d%s",
- cellnamesz, cellnamesz, cellname ?: "", cell,
- volnamesz, volnamesz, volname, suffix ?: "-",
- type,
- force ? " FORCE" : "");
-
- /* lookup the cell record */
- if (cellname || !cell) {
- ret = afs_cell_lookup(cellname, cellnamesz, &cell);
- if (ret<0) {
- printk("kAFS: unable to lookup cell '%s'\n",
- cellname ?: "");
- goto error;
- }
- }
- else {
- afs_get_cell(cell);
- }
+ _enter("{%*.*s,%d}",
+ params->volnamesz, params->volnamesz, params->volname, params->rwpath);
/* lookup the volume location record */
- ret = afs_vlocation_lookup(cell, volname, volnamesz, &vlocation);
- if (ret < 0)
+ vlocation = afs_vlocation_lookup(params->cell, params->key,
+ params->volname, params->volnamesz);
+ if (IS_ERR(vlocation)) {
+ ret = PTR_ERR(vlocation);
+ vlocation = NULL;
goto error;
+ }
/* make the final decision on the type we want */
ret = -ENOMEDIUM;
- if (force && !(vlocation->vldb.vidmask & (1 << type)))
+ if (params->force && !(vlocation->vldb.vidmask & (1 << params->type)))
goto error;
srvtmask = 0;
for (loop = 0; loop < vlocation->vldb.nservers; loop++)
srvtmask |= vlocation->vldb.srvtmask[loop];
- if (force) {
- if (!(srvtmask & (1 << type)))
+ if (params->force) {
+ if (!(srvtmask & (1 << params->type)))
goto error;
- }
- else if (srvtmask & AFS_VOL_VTM_RO) {
- type = AFSVL_ROVOL;
- }
- else if (srvtmask & AFS_VOL_VTM_RW) {
- type = AFSVL_RWVOL;
- }
- else {
+ } else if (srvtmask & AFS_VOL_VTM_RO) {
+ params->type = AFSVL_ROVOL;
+ } else if (srvtmask & AFS_VOL_VTM_RW) {
+ params->type = AFSVL_RWVOL;
+ } else {
goto error;
}
- down_write(&cell->vl_sem);
+ down_write(&params->cell->vl_sem);
/* is the volume already active? */
- if (vlocation->vols[type]) {
+ if (vlocation->vols[params->type]) {
/* yes - re-use it */
- volume = vlocation->vols[type];
+ volume = vlocation->vols[params->type];
afs_get_volume(volume);
goto success;
}
@@ -191,23 +100,24 @@ int afs_volume_lookup(const char *name, struct afs_cell *cell, int rwpath,
goto error_up;
atomic_set(&volume->usage, 1);
- volume->type = type;
- volume->type_force = force;
- volume->cell = cell;
- volume->vid = vlocation->vldb.vid[type];
+ volume->type = params->type;
+ volume->type_force = params->force;
+ volume->cell = params->cell;
+ volume->vid = vlocation->vldb.vid[params->type];
init_rwsem(&volume->server_sem);
/* look up all the applicable server records */
for (loop = 0; loop < 8; loop++) {
if (vlocation->vldb.srvtmask[loop] & (1 << volume->type)) {
- ret = afs_server_lookup(
- volume->cell,
- &vlocation->vldb.servers[loop],
- &volume->servers[volume->nservers]);
- if (ret < 0)
+ server = afs_lookup_server(
+ volume->cell, &vlocation->vldb.servers[loop]);
+ if (IS_ERR(server)) {
+ ret = PTR_ERR(server);
goto error_discard;
+ }
+ volume->servers[volume->nservers] = server;
volume->nservers++;
}
}
@@ -223,35 +133,34 @@ int afs_volume_lookup(const char *name, struct afs_cell *cell, int rwpath,
afs_get_vlocation(vlocation);
volume->vlocation = vlocation;
- vlocation->vols[type] = volume;
+ vlocation->vols[volume->type] = volume;
- success:
+success:
_debug("kAFS selected %s volume %08x",
afs_voltypes[volume->type], volume->vid);
- *_volume = volume;
- ret = 0;
+ up_write(&params->cell->vl_sem);
+ afs_put_vlocation(vlocation);
+ _leave(" = %p", volume);
+ return volume;
/* clean up */
- error_up:
- up_write(&cell->vl_sem);
- error:
+error_up:
+ up_write(&params->cell->vl_sem);
+error:
afs_put_vlocation(vlocation);
- afs_put_cell(cell);
-
- _leave(" = %d (%p)", ret, volume);
- return ret;
+ _leave(" = %d", ret);
+ return ERR_PTR(ret);
- error_discard:
- up_write(&cell->vl_sem);
+error_discard:
+ up_write(&params->cell->vl_sem);
for (loop = volume->nservers - 1; loop >= 0; loop--)
afs_put_server(volume->servers[loop]);
kfree(volume);
goto error;
-} /* end afs_volume_lookup() */
+}
-/*****************************************************************************/
/*
* destroy a volume record
*/
@@ -265,10 +174,9 @@ void afs_put_volume(struct afs_volume *volume)
_enter("%p", volume);
- vlocation = volume->vlocation;
+ ASSERTCMP(atomic_read(&volume->usage), >, 0);
- /* sanity check */
- BUG_ON(atomic_read(&volume->usage) <= 0);
+ vlocation = volume->vlocation;
/* to prevent a race, the decrement and the dequeue must be effectively
* atomic */
@@ -296,21 +204,27 @@ void afs_put_volume(struct afs_volume *volume)
kfree(volume);
_leave(" [destroyed]");
-} /* end afs_put_volume() */
+}
-/*****************************************************************************/
/*
* pick a server to use to try accessing this volume
* - returns with an elevated usage count on the server chosen
*/
-int afs_volume_pick_fileserver(struct afs_volume *volume,
- struct afs_server **_server)
+struct afs_server *afs_volume_pick_fileserver(struct afs_vnode *vnode)
{
+ struct afs_volume *volume = vnode->volume;
struct afs_server *server;
int ret, state, loop;
_enter("%s", volume->vlocation->vldb.name);
+ /* stick with the server we're already using if we can */
+ if (vnode->server && vnode->server->fs_state == 0) {
+ afs_get_server(vnode->server);
+ _leave(" = %p [current]", vnode->server);
+ return vnode->server;
+ }
+
down_read(&volume->server_sem);
/* handle the no-server case */
@@ -318,7 +232,7 @@ int afs_volume_pick_fileserver(struct afs_volume *volume,
ret = volume->rjservers ? -ENOMEDIUM : -ESTALE;
up_read(&volume->server_sem);
_leave(" = %d [no servers]", ret);
- return ret;
+ return ERR_PTR(ret);
}
/* basically, just search the list for the first live server and use
@@ -328,15 +242,16 @@ int afs_volume_pick_fileserver(struct afs_volume *volume,
server = volume->servers[loop];
state = server->fs_state;
+ _debug("consider %d [%d]", loop, state);
+
switch (state) {
/* found an apparently healthy server */
case 0:
afs_get_server(server);
up_read(&volume->server_sem);
- *_server = server;
- _leave(" = 0 (picked %08x)",
- ntohl(server->addr.s_addr));
- return 0;
+ _leave(" = %p (picked %08x)",
+ server, ntohl(server->addr.s_addr));
+ return server;
case -ENETUNREACH:
if (ret == 0)
@@ -372,20 +287,21 @@ int afs_volume_pick_fileserver(struct afs_volume *volume,
*/
up_read(&volume->server_sem);
_leave(" = %d", ret);
- return ret;
-} /* end afs_volume_pick_fileserver() */
+ return ERR_PTR(ret);
+}
-/*****************************************************************************/
/*
* release a server after use
* - releases the ref on the server struct that was acquired by picking
* - records result of using a particular server to access a volume
* - return 0 to try again, 1 if okay or to issue error
+ * - the caller must release the server struct if result was 0
*/
-int afs_volume_release_fileserver(struct afs_volume *volume,
+int afs_volume_release_fileserver(struct afs_vnode *vnode,
struct afs_server *server,
int result)
{
+ struct afs_volume *volume = vnode->volume;
unsigned loop;
_enter("%s,%08x,%d",
@@ -396,14 +312,16 @@ int afs_volume_release_fileserver(struct afs_volume *volume,
/* success */
case 0:
server->fs_act_jif = jiffies;
- break;
+ server->fs_state = 0;
+ _leave("");
+ return 1;
/* the fileserver denied all knowledge of the volume */
case -ENOMEDIUM:
server->fs_act_jif = jiffies;
down_write(&volume->server_sem);
- /* first, find where the server is in the active list (if it
+ /* firstly, find where the server is in the active list (if it
* is) */
for (loop = 0; loop < volume->nservers; loop++)
if (volume->servers[loop] == server)
@@ -441,6 +359,7 @@ int afs_volume_release_fileserver(struct afs_volume *volume,
case -ENETUNREACH:
case -EHOSTUNREACH:
case -ECONNREFUSED:
+ case -ETIME:
case -ETIMEDOUT:
case -EREMOTEIO:
/* mark the server as dead
@@ -460,60 +379,17 @@ int afs_volume_release_fileserver(struct afs_volume *volume,
server->fs_act_jif = jiffies;
case -ENOMEM:
case -ENONET:
- break;
+ /* tell the caller to accept the result */
+ afs_put_server(server);
+ _leave(" [local failure]");
+ return 1;
}
- /* tell the caller to accept the result */
- afs_put_server(server);
- _leave("");
- return 1;
-
/* tell the caller to loop around and try the next server */
- try_next_server_upw:
+try_next_server_upw:
up_write(&volume->server_sem);
- try_next_server:
+try_next_server:
afs_put_server(server);
_leave(" [try next server]");
return 0;
-
-} /* end afs_volume_release_fileserver() */
-
-/*****************************************************************************/
-/*
- * match a volume hash record stored in the cache
- */
-#ifdef AFS_CACHING_SUPPORT
-static cachefs_match_val_t afs_volume_cache_match(void *target,
- const void *entry)
-{
- const struct afs_cache_vhash *vhash = entry;
- struct afs_volume *volume = target;
-
- _enter("{%u},{%u}", volume->type, vhash->vtype);
-
- if (volume->type == vhash->vtype) {
- _leave(" = SUCCESS");
- return CACHEFS_MATCH_SUCCESS;
- }
-
- _leave(" = FAILED");
- return CACHEFS_MATCH_FAILED;
-} /* end afs_volume_cache_match() */
-#endif
-
-/*****************************************************************************/
-/*
- * update a volume hash record stored in the cache
- */
-#ifdef AFS_CACHING_SUPPORT
-static void afs_volume_cache_update(void *source, void *entry)
-{
- struct afs_cache_vhash *vhash = entry;
- struct afs_volume *volume = source;
-
- _enter("");
-
- vhash->vtype = volume->type;
-
-} /* end afs_volume_cache_update() */
-#endif
+}
diff --git a/fs/afs/volume.h b/fs/afs/volume.h
deleted file mode 100644
index bfdcf19ba3f..00000000000
--- a/fs/afs/volume.h
+++ /dev/null
@@ -1,140 +0,0 @@
-/* volume.h: AFS volume management
- *
- * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#ifndef _LINUX_AFS_VOLUME_H
-#define _LINUX_AFS_VOLUME_H
-
-#include "types.h"
-#include "fsclient.h"
-#include "kafstimod.h"
-#include "kafsasyncd.h"
-#include "cache.h"
-
-typedef enum {
- AFS_VLUPD_SLEEP, /* sleeping waiting for update timer to fire */
- AFS_VLUPD_PENDING, /* on pending queue */
- AFS_VLUPD_INPROGRESS, /* op in progress */
- AFS_VLUPD_BUSYSLEEP, /* sleeping because server returned EBUSY */
-
-} __attribute__((packed)) afs_vlocation_upd_t;
-
-/*****************************************************************************/
-/*
- * entry in the cached volume location catalogue
- */
-struct afs_cache_vlocation
-{
- uint8_t name[64]; /* volume name (lowercase, padded with NULs) */
- uint8_t nservers; /* number of entries used in servers[] */
- uint8_t vidmask; /* voltype mask for vid[] */
- uint8_t srvtmask[8]; /* voltype masks for servers[] */
-#define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */
-#define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */
-#define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */
-
- afs_volid_t vid[3]; /* volume IDs for R/W, R/O and Bak volumes */
- struct in_addr servers[8]; /* fileserver addresses */
- time_t rtime; /* last retrieval time */
-};
-
-#ifdef AFS_CACHING_SUPPORT
-extern struct cachefs_index_def afs_vlocation_cache_index_def;
-#endif
-
-/*****************************************************************************/
-/*
- * volume -> vnode hash table entry
- */
-struct afs_cache_vhash
-{
- afs_voltype_t vtype; /* which volume variation */
- uint8_t hash_bucket; /* which hash bucket this represents */
-} __attribute__((packed));
-
-#ifdef AFS_CACHING_SUPPORT
-extern struct cachefs_index_def afs_volume_cache_index_def;
-#endif
-
-/*****************************************************************************/
-/*
- * AFS volume location record
- */
-struct afs_vlocation
-{
- atomic_t usage;
- struct list_head link; /* link in cell volume location list */
- struct afs_timer timeout; /* decaching timer */
- struct afs_cell *cell; /* cell to which volume belongs */
-#ifdef AFS_CACHING_SUPPORT
- struct cachefs_cookie *cache; /* caching cookie */
-#endif
- struct afs_cache_vlocation vldb; /* volume information DB record */
- struct afs_volume *vols[3]; /* volume access record pointer (index by type) */
- rwlock_t lock; /* access lock */
- unsigned long read_jif; /* time at which last read from vlserver */
- struct afs_timer upd_timer; /* update timer */
- struct afs_async_op upd_op; /* update operation */
- afs_vlocation_upd_t upd_state; /* update state */
- unsigned short upd_first_svix; /* first server index during update */
- unsigned short upd_curr_svix; /* current server index during update */
- unsigned short upd_rej_cnt; /* ENOMEDIUM count during update */
- unsigned short upd_busy_cnt; /* EBUSY count during update */
- unsigned short valid; /* T if valid */
-};
-
-extern int afs_vlocation_lookup(struct afs_cell *cell,
- const char *name,
- unsigned namesz,
- struct afs_vlocation **_vlocation);
-
-#define afs_get_vlocation(V) do { atomic_inc(&(V)->usage); } while(0)
-
-extern void afs_put_vlocation(struct afs_vlocation *vlocation);
-extern void afs_vlocation_do_timeout(struct afs_vlocation *vlocation);
-
-/*****************************************************************************/
-/*
- * AFS volume access record
- */
-struct afs_volume
-{
- atomic_t usage;
- struct afs_cell *cell; /* cell to which belongs (unrefd ptr) */
- struct afs_vlocation *vlocation; /* volume location */
-#ifdef AFS_CACHING_SUPPORT
- struct cachefs_cookie *cache; /* caching cookie */
-#endif
- afs_volid_t vid; /* volume ID */
- afs_voltype_t type; /* type of volume */
- char type_force; /* force volume type (suppress R/O -> R/W) */
- unsigned short nservers; /* number of server slots filled */
- unsigned short rjservers; /* number of servers discarded due to -ENOMEDIUM */
- struct afs_server *servers[8]; /* servers on which volume resides (ordered) */
- struct rw_semaphore server_sem; /* lock for accessing current server */
-};
-
-extern int afs_volume_lookup(const char *name,
- struct afs_cell *cell,
- int rwpath,
- struct afs_volume **_volume);
-
-#define afs_get_volume(V) do { atomic_inc(&(V)->usage); } while(0)
-
-extern void afs_put_volume(struct afs_volume *volume);
-
-extern int afs_volume_pick_fileserver(struct afs_volume *volume,
- struct afs_server **_server);
-
-extern int afs_volume_release_fileserver(struct afs_volume *volume,
- struct afs_server *server,
- int result);
-
-#endif /* _LINUX_AFS_VOLUME_H */