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-rw-r--r--fs/cifs/Kconfig9
-rw-r--r--fs/cifs/Makefile2
-rw-r--r--fs/cifs/cache.c331
-rw-r--r--fs/cifs/cifs_dfs_ref.c28
-rw-r--r--fs/cifs/cifs_fs_sb.h1
-rw-r--r--fs/cifs/cifs_spnego.c3
-rw-r--r--fs/cifs/cifsfs.c37
-rw-r--r--fs/cifs/cifsfs.h2
-rw-r--r--fs/cifs/cifsglob.h40
-rw-r--r--fs/cifs/cifsproto.h5
-rw-r--r--fs/cifs/connect.c180
-rw-r--r--fs/cifs/dir.c82
-rw-r--r--fs/cifs/dns_resolve.c71
-rw-r--r--fs/cifs/dns_resolve.h4
-rw-r--r--fs/cifs/file.c172
-rw-r--r--fs/cifs/fscache.c236
-rw-r--r--fs/cifs/fscache.h136
-rw-r--r--fs/cifs/inode.c24
-rw-r--r--fs/cifs/ioctl.c3
-rw-r--r--fs/cifs/netmisc.c24
-rw-r--r--fs/cifs/readdir.c5
-rw-r--r--fs/cifs/sess.c10
-rw-r--r--fs/cifs/smberr.h1
23 files changed, 1176 insertions, 230 deletions
diff --git a/fs/cifs/Kconfig b/fs/cifs/Kconfig
index 80f35259680..5739fd7f88b 100644
--- a/fs/cifs/Kconfig
+++ b/fs/cifs/Kconfig
@@ -131,6 +131,15 @@ config CIFS_DFS_UPCALL
IP addresses) which is needed for implicit mounts of DFS junction
points. If unsure, say N.
+config CIFS_FSCACHE
+ bool "Provide CIFS client caching support (EXPERIMENTAL)"
+ depends on EXPERIMENTAL
+ depends on CIFS=m && FSCACHE || CIFS=y && FSCACHE=y
+ help
+ Makes CIFS FS-Cache capable. Say Y here if you want your CIFS data
+ to be cached locally on disk through the general filesystem cache
+ manager. If unsure, say N.
+
config CIFS_EXPERIMENTAL
bool "CIFS Experimental Features (EXPERIMENTAL)"
depends on CIFS && EXPERIMENTAL
diff --git a/fs/cifs/Makefile b/fs/cifs/Makefile
index 9948c0030e8..adefa60a9bd 100644
--- a/fs/cifs/Makefile
+++ b/fs/cifs/Makefile
@@ -11,3 +11,5 @@ cifs-y := cifsfs.o cifssmb.o cifs_debug.o connect.o dir.o file.o inode.o \
cifs-$(CONFIG_CIFS_UPCALL) += cifs_spnego.o
cifs-$(CONFIG_CIFS_DFS_UPCALL) += dns_resolve.o cifs_dfs_ref.o
+
+cifs-$(CONFIG_CIFS_FSCACHE) += fscache.o cache.o
diff --git a/fs/cifs/cache.c b/fs/cifs/cache.c
new file mode 100644
index 00000000000..224d7bbd1fc
--- /dev/null
+++ b/fs/cifs/cache.c
@@ -0,0 +1,331 @@
+/*
+ * fs/cifs/cache.c - CIFS filesystem cache index structure definitions
+ *
+ * Copyright (c) 2010 Novell, Inc.
+ * Authors(s): Suresh Jayaraman (sjayaraman@suse.de>
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; either version 2.1 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include "fscache.h"
+#include "cifs_debug.h"
+
+/*
+ * CIFS filesystem definition for FS-Cache
+ */
+struct fscache_netfs cifs_fscache_netfs = {
+ .name = "cifs",
+ .version = 0,
+};
+
+/*
+ * Register CIFS for caching with FS-Cache
+ */
+int cifs_fscache_register(void)
+{
+ return fscache_register_netfs(&cifs_fscache_netfs);
+}
+
+/*
+ * Unregister CIFS for caching
+ */
+void cifs_fscache_unregister(void)
+{
+ fscache_unregister_netfs(&cifs_fscache_netfs);
+}
+
+/*
+ * Key layout of CIFS server cache index object
+ */
+struct cifs_server_key {
+ uint16_t family; /* address family */
+ uint16_t port; /* IP port */
+ union {
+ struct in_addr ipv4_addr;
+ struct in6_addr ipv6_addr;
+ } addr[0];
+};
+
+/*
+ * Server object keyed by {IPaddress,port,family} tuple
+ */
+static uint16_t cifs_server_get_key(const void *cookie_netfs_data,
+ void *buffer, uint16_t maxbuf)
+{
+ const struct TCP_Server_Info *server = cookie_netfs_data;
+ const struct sockaddr *sa = (struct sockaddr *) &server->addr.sockAddr;
+ struct cifs_server_key *key = buffer;
+ uint16_t key_len = sizeof(struct cifs_server_key);
+
+ memset(key, 0, key_len);
+
+ /*
+ * Should not be a problem as sin_family/sin6_family overlays
+ * sa_family field
+ */
+ switch (sa->sa_family) {
+ case AF_INET:
+ key->family = server->addr.sockAddr.sin_family;
+ key->port = server->addr.sockAddr.sin_port;
+ key->addr[0].ipv4_addr = server->addr.sockAddr.sin_addr;
+ key_len += sizeof(key->addr[0].ipv4_addr);
+ break;
+
+ case AF_INET6:
+ key->family = server->addr.sockAddr6.sin6_family;
+ key->port = server->addr.sockAddr6.sin6_port;
+ key->addr[0].ipv6_addr = server->addr.sockAddr6.sin6_addr;
+ key_len += sizeof(key->addr[0].ipv6_addr);
+ break;
+
+ default:
+ cERROR(1, "CIFS: Unknown network family '%d'", sa->sa_family);
+ key_len = 0;
+ break;
+ }
+
+ return key_len;
+}
+
+/*
+ * Server object for FS-Cache
+ */
+const struct fscache_cookie_def cifs_fscache_server_index_def = {
+ .name = "CIFS.server",
+ .type = FSCACHE_COOKIE_TYPE_INDEX,
+ .get_key = cifs_server_get_key,
+};
+
+/*
+ * Auxiliary data attached to CIFS superblock within the cache
+ */
+struct cifs_fscache_super_auxdata {
+ u64 resource_id; /* unique server resource id */
+};
+
+static char *extract_sharename(const char *treename)
+{
+ const char *src;
+ char *delim, *dst;
+ int len;
+
+ /* skip double chars at the beginning */
+ src = treename + 2;
+
+ /* share name is always preceded by '\\' now */
+ delim = strchr(src, '\\');
+ if (!delim)
+ return ERR_PTR(-EINVAL);
+ delim++;
+ len = strlen(delim);
+
+ /* caller has to free the memory */
+ dst = kstrndup(delim, len, GFP_KERNEL);
+ if (!dst)
+ return ERR_PTR(-ENOMEM);
+
+ return dst;
+}
+
+/*
+ * Superblock object currently keyed by share name
+ */
+static uint16_t cifs_super_get_key(const void *cookie_netfs_data, void *buffer,
+ uint16_t maxbuf)
+{
+ const struct cifsTconInfo *tcon = cookie_netfs_data;
+ char *sharename;
+ uint16_t len;
+
+ sharename = extract_sharename(tcon->treeName);
+ if (IS_ERR(sharename)) {
+ cFYI(1, "CIFS: couldn't extract sharename\n");
+ sharename = NULL;
+ return 0;
+ }
+
+ len = strlen(sharename);
+ if (len > maxbuf)
+ return 0;
+
+ memcpy(buffer, sharename, len);
+
+ kfree(sharename);
+
+ return len;
+}
+
+static uint16_t
+cifs_fscache_super_get_aux(const void *cookie_netfs_data, void *buffer,
+ uint16_t maxbuf)
+{
+ struct cifs_fscache_super_auxdata auxdata;
+ const struct cifsTconInfo *tcon = cookie_netfs_data;
+
+ memset(&auxdata, 0, sizeof(auxdata));
+ auxdata.resource_id = tcon->resource_id;
+
+ if (maxbuf > sizeof(auxdata))
+ maxbuf = sizeof(auxdata);
+
+ memcpy(buffer, &auxdata, maxbuf);
+
+ return maxbuf;
+}
+
+static enum
+fscache_checkaux cifs_fscache_super_check_aux(void *cookie_netfs_data,
+ const void *data,
+ uint16_t datalen)
+{
+ struct cifs_fscache_super_auxdata auxdata;
+ const struct cifsTconInfo *tcon = cookie_netfs_data;
+
+ if (datalen != sizeof(auxdata))
+ return FSCACHE_CHECKAUX_OBSOLETE;
+
+ memset(&auxdata, 0, sizeof(auxdata));
+ auxdata.resource_id = tcon->resource_id;
+
+ if (memcmp(data, &auxdata, datalen) != 0)
+ return FSCACHE_CHECKAUX_OBSOLETE;
+
+ return FSCACHE_CHECKAUX_OKAY;
+}
+
+/*
+ * Superblock object for FS-Cache
+ */
+const struct fscache_cookie_def cifs_fscache_super_index_def = {
+ .name = "CIFS.super",
+ .type = FSCACHE_COOKIE_TYPE_INDEX,
+ .get_key = cifs_super_get_key,
+ .get_aux = cifs_fscache_super_get_aux,
+ .check_aux = cifs_fscache_super_check_aux,
+};
+
+/*
+ * Auxiliary data attached to CIFS inode within the cache
+ */
+struct cifs_fscache_inode_auxdata {
+ struct timespec last_write_time;
+ struct timespec last_change_time;
+ u64 eof;
+};
+
+static uint16_t cifs_fscache_inode_get_key(const void *cookie_netfs_data,
+ void *buffer, uint16_t maxbuf)
+{
+ const struct cifsInodeInfo *cifsi = cookie_netfs_data;
+ uint16_t keylen;
+
+ /* use the UniqueId as the key */
+ keylen = sizeof(cifsi->uniqueid);
+ if (keylen > maxbuf)
+ keylen = 0;
+ else
+ memcpy(buffer, &cifsi->uniqueid, keylen);
+
+ return keylen;
+}
+
+static void
+cifs_fscache_inode_get_attr(const void *cookie_netfs_data, uint64_t *size)
+{
+ const struct cifsInodeInfo *cifsi = cookie_netfs_data;
+
+ *size = cifsi->vfs_inode.i_size;
+}
+
+static uint16_t
+cifs_fscache_inode_get_aux(const void *cookie_netfs_data, void *buffer,
+ uint16_t maxbuf)
+{
+ struct cifs_fscache_inode_auxdata auxdata;
+ const struct cifsInodeInfo *cifsi = cookie_netfs_data;
+
+ memset(&auxdata, 0, sizeof(auxdata));
+ auxdata.eof = cifsi->server_eof;
+ auxdata.last_write_time = cifsi->vfs_inode.i_mtime;
+ auxdata.last_change_time = cifsi->vfs_inode.i_ctime;
+
+ if (maxbuf > sizeof(auxdata))
+ maxbuf = sizeof(auxdata);
+
+ memcpy(buffer, &auxdata, maxbuf);
+
+ return maxbuf;
+}
+
+static enum
+fscache_checkaux cifs_fscache_inode_check_aux(void *cookie_netfs_data,
+ const void *data,
+ uint16_t datalen)
+{
+ struct cifs_fscache_inode_auxdata auxdata;
+ struct cifsInodeInfo *cifsi = cookie_netfs_data;
+
+ if (datalen != sizeof(auxdata))
+ return FSCACHE_CHECKAUX_OBSOLETE;
+
+ memset(&auxdata, 0, sizeof(auxdata));
+ auxdata.eof = cifsi->server_eof;
+ auxdata.last_write_time = cifsi->vfs_inode.i_mtime;
+ auxdata.last_change_time = cifsi->vfs_inode.i_ctime;
+
+ if (memcmp(data, &auxdata, datalen) != 0)
+ return FSCACHE_CHECKAUX_OBSOLETE;
+
+ return FSCACHE_CHECKAUX_OKAY;
+}
+
+static void cifs_fscache_inode_now_uncached(void *cookie_netfs_data)
+{
+ struct cifsInodeInfo *cifsi = cookie_netfs_data;
+ struct pagevec pvec;
+ pgoff_t first;
+ int loop, nr_pages;
+
+ pagevec_init(&pvec, 0);
+ first = 0;
+
+ cFYI(1, "cifs inode 0x%p now uncached", cifsi);
+
+ for (;;) {
+ nr_pages = pagevec_lookup(&pvec,
+ cifsi->vfs_inode.i_mapping, first,
+ PAGEVEC_SIZE - pagevec_count(&pvec));
+ if (!nr_pages)
+ break;
+
+ for (loop = 0; loop < nr_pages; loop++)
+ ClearPageFsCache(pvec.pages[loop]);
+
+ first = pvec.pages[nr_pages - 1]->index + 1;
+
+ pvec.nr = nr_pages;
+ pagevec_release(&pvec);
+ cond_resched();
+ }
+}
+
+const struct fscache_cookie_def cifs_fscache_inode_object_def = {
+ .name = "CIFS.uniqueid",
+ .type = FSCACHE_COOKIE_TYPE_DATAFILE,
+ .get_key = cifs_fscache_inode_get_key,
+ .get_attr = cifs_fscache_inode_get_attr,
+ .get_aux = cifs_fscache_inode_get_aux,
+ .check_aux = cifs_fscache_inode_check_aux,
+ .now_uncached = cifs_fscache_inode_now_uncached,
+};
diff --git a/fs/cifs/cifs_dfs_ref.c b/fs/cifs/cifs_dfs_ref.c
index ac19a6f3dae..dc1ed50ea06 100644
--- a/fs/cifs/cifs_dfs_ref.c
+++ b/fs/cifs/cifs_dfs_ref.c
@@ -230,28 +230,22 @@ compose_mount_options_err:
goto compose_mount_options_out;
}
-
-static struct vfsmount *cifs_dfs_do_refmount(const struct vfsmount *mnt_parent,
- struct dentry *dentry, const struct dfs_info3_param *ref)
+/**
+ * cifs_dfs_do_refmount - mounts specified path using provided refferal
+ * @cifs_sb: parent/root superblock
+ * @fullpath: full path in UNC format
+ * @ref: server's referral
+ */
+static struct vfsmount *cifs_dfs_do_refmount(struct cifs_sb_info *cifs_sb,
+ const char *fullpath, const struct dfs_info3_param *ref)
{
- struct cifs_sb_info *cifs_sb;
struct vfsmount *mnt;
char *mountdata;
char *devname = NULL;
- char *fullpath;
-
- cifs_sb = CIFS_SB(dentry->d_inode->i_sb);
- /*
- * this function gives us a path with a double backslash prefix. We
- * require a single backslash for DFS.
- */
- fullpath = build_path_from_dentry(dentry);
- if (!fullpath)
- return ERR_PTR(-ENOMEM);
+ /* strip first '\' from fullpath */
mountdata = cifs_compose_mount_options(cifs_sb->mountdata,
fullpath + 1, ref, &devname);
- kfree(fullpath);
if (IS_ERR(mountdata))
return (struct vfsmount *)mountdata;
@@ -357,8 +351,8 @@ cifs_dfs_follow_mountpoint(struct dentry *dentry, struct nameidata *nd)
rc = -EINVAL;
goto out_err;
}
- mnt = cifs_dfs_do_refmount(nd->path.mnt,
- nd->path.dentry, referrals + i);
+ mnt = cifs_dfs_do_refmount(cifs_sb,
+ full_path, referrals + i);
cFYI(1, "%s: cifs_dfs_do_refmount:%s , mnt:%p", __func__,
referrals[i].node_name, mnt);
diff --git a/fs/cifs/cifs_fs_sb.h b/fs/cifs/cifs_fs_sb.h
index 246a167cb91..9e771450c3b 100644
--- a/fs/cifs/cifs_fs_sb.h
+++ b/fs/cifs/cifs_fs_sb.h
@@ -35,6 +35,7 @@
#define CIFS_MOUNT_DYNPERM 0x1000 /* allow in-memory only mode setting */
#define CIFS_MOUNT_NOPOSIXBRL 0x2000 /* mandatory not posix byte range lock */
#define CIFS_MOUNT_NOSSYNC 0x4000 /* don't do slow SMBflush on every sync*/
+#define CIFS_MOUNT_FSCACHE 0x8000 /* local caching enabled */
struct cifs_sb_info {
struct cifsTconInfo *tcon; /* primary mount */
diff --git a/fs/cifs/cifs_spnego.c b/fs/cifs/cifs_spnego.c
index 379bd7d9c05..6effccff85a 100644
--- a/fs/cifs/cifs_spnego.c
+++ b/fs/cifs/cifs_spnego.c
@@ -144,6 +144,9 @@ cifs_get_spnego_key(struct cifsSesInfo *sesInfo)
sprintf(dp, ";uid=0x%x", sesInfo->linux_uid);
dp = description + strlen(description);
+ sprintf(dp, ";creduid=0x%x", sesInfo->cred_uid);
+
+ dp = description + strlen(description);
sprintf(dp, ";user=%s", sesInfo->userName);
dp = description + strlen(description);
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 78c02eb4cb1..8a2cf129e53 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -47,6 +47,7 @@
#include <linux/key-type.h>
#include "dns_resolve.h"
#include "cifs_spnego.h"
+#include "fscache.h"
#define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */
int cifsFYI = 0;
@@ -329,6 +330,12 @@ cifs_destroy_inode(struct inode *inode)
}
static void
+cifs_clear_inode(struct inode *inode)
+{
+ cifs_fscache_release_inode_cookie(inode);
+}
+
+static void
cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
{
seq_printf(s, ",addr=");
@@ -473,14 +480,25 @@ static int cifs_remount(struct super_block *sb, int *flags, char *data)
return 0;
}
+void cifs_drop_inode(struct inode *inode)
+{
+ struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
+ return generic_drop_inode(inode);
+
+ return generic_delete_inode(inode);
+}
+
static const struct super_operations cifs_super_ops = {
.put_super = cifs_put_super,
.statfs = cifs_statfs,
.alloc_inode = cifs_alloc_inode,
.destroy_inode = cifs_destroy_inode,
-/* .drop_inode = generic_delete_inode,
- .delete_inode = cifs_delete_inode, */ /* Do not need above two
- functions unless later we add lazy close of inodes or unless the
+ .drop_inode = cifs_drop_inode,
+ .clear_inode = cifs_clear_inode,
+/* .delete_inode = cifs_delete_inode, */ /* Do not need above
+ function unless later we add lazy close of inodes or unless the
kernel forgets to call us with the same number of releases (closes)
as opens */
.show_options = cifs_show_options,
@@ -892,6 +910,10 @@ init_cifs(void)
cFYI(1, "cifs_max_pending set to max of 256");
}
+ rc = cifs_fscache_register();
+ if (rc)
+ goto out;
+
rc = cifs_init_inodecache();
if (rc)
goto out_clean_proc;
@@ -913,7 +935,7 @@ init_cifs(void)
goto out_unregister_filesystem;
#endif
#ifdef CONFIG_CIFS_DFS_UPCALL
- rc = register_key_type(&key_type_dns_resolver);
+ rc = cifs_init_dns_resolver();
if (rc)
goto out_unregister_key_type;
#endif
@@ -925,7 +947,7 @@ init_cifs(void)
out_unregister_resolver_key:
#ifdef CONFIG_CIFS_DFS_UPCALL
- unregister_key_type(&key_type_dns_resolver);
+ cifs_exit_dns_resolver();
out_unregister_key_type:
#endif
#ifdef CONFIG_CIFS_UPCALL
@@ -941,6 +963,8 @@ init_cifs(void)
cifs_destroy_inodecache();
out_clean_proc:
cifs_proc_clean();
+ cifs_fscache_unregister();
+ out:
return rc;
}
@@ -949,9 +973,10 @@ exit_cifs(void)
{
cFYI(DBG2, "exit_cifs");
cifs_proc_clean();
+ cifs_fscache_unregister();
#ifdef CONFIG_CIFS_DFS_UPCALL
cifs_dfs_release_automount_timer();
- unregister_key_type(&key_type_dns_resolver);
+ cifs_exit_dns_resolver();
#endif
#ifdef CONFIG_CIFS_UPCALL
unregister_key_type(&cifs_spnego_key_type);
diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index a7eb65c84b1..d82f5fb4761 100644
--- a/fs/cifs/cifsfs.h
+++ b/fs/cifs/cifsfs.h
@@ -114,5 +114,5 @@ extern long cifs_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
extern const struct export_operations cifs_export_ops;
#endif /* EXPERIMENTAL */
-#define CIFS_VERSION "1.64"
+#define CIFS_VERSION "1.65"
#endif /* _CIFSFS_H */
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index a88479ceaad..59906146ad3 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -16,6 +16,9 @@
* the GNU Lesser General Public License for more details.
*
*/
+#ifndef _CIFS_GLOB_H
+#define _CIFS_GLOB_H
+
#include <linux/in.h>
#include <linux/in6.h>
#include <linux/slab.h>
@@ -34,7 +37,7 @@
#define MAX_SHARE_SIZE 64 /* used to be 20, this should still be enough */
#define MAX_USERNAME_SIZE 32 /* 32 is to allow for 15 char names + null
termination then *2 for unicode versions */
-#define MAX_PASSWORD_SIZE 16
+#define MAX_PASSWORD_SIZE 512 /* max for windows seems to be 256 wide chars */
#define CIFS_MIN_RCV_POOL 4
@@ -80,8 +83,7 @@ enum statusEnum {
};
enum securityEnum {
- PLAINTXT = 0, /* Legacy with Plaintext passwords */
- LANMAN, /* Legacy LANMAN auth */
+ LANMAN = 0, /* Legacy LANMAN auth */
NTLM, /* Legacy NTLM012 auth with NTLM hash */
NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
@@ -142,7 +144,6 @@ struct TCP_Server_Info {
struct list_head pending_mid_q;
void *Server_NlsInfo; /* BB - placeholder for future NLS info */
unsigned short server_codepage; /* codepage for the server */
- unsigned long ip_address; /* IP addr for the server if known */
enum protocolEnum protocolType;
char versionMajor;
char versionMinor;
@@ -190,19 +191,9 @@ struct TCP_Server_Info {
bool sec_mskerberos; /* supports legacy MS Kerberos */
bool sec_kerberosu2u; /* supports U2U Kerberos */
bool sec_ntlmssp; /* supports NTLMSSP */
-};
-
-/*
- * The following is our shortcut to user information. We surface the uid,
- * and name. We always get the password on the fly in case it
- * has changed. We also hang a list of sessions owned by this user off here.
- */
-struct cifsUidInfo {
- struct list_head userList;
- struct list_head sessionList; /* SMB sessions for this user */
- uid_t linux_uid;
- char user[MAX_USERNAME_SIZE + 1]; /* ascii name of user */
- /* BB may need ptr or callback for PAM or WinBind info */
+#ifdef CONFIG_CIFS_FSCACHE
+ struct fscache_cookie *fscache; /* client index cache cookie */
+#endif
};
/*
@@ -212,9 +203,6 @@ struct cifsSesInfo {
struct list_head smb_ses_list;
struct list_head tcon_list;
struct mutex session_mutex;
-#if 0
- struct cifsUidInfo *uidInfo; /* pointer to user info */
-#endif
struct TCP_Server_Info *server; /* pointer to server info */
int ses_count; /* reference counter */
enum statusEnum status;
@@ -226,7 +214,8 @@ struct cifsSesInfo {
char *serverNOS; /* name of network operating system of server */
char *serverDomain; /* security realm of server */
int Suid; /* remote smb uid */
- uid_t linux_uid; /* local Linux uid */
+ uid_t linux_uid; /* overriding owner of files on the mount */
+ uid_t cred_uid; /* owner of credentials */
int capabilities;
char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
TCP names - will ipv6 and sctp addresses fit? */
@@ -311,6 +300,10 @@ struct cifsTconInfo {
bool local_lease:1; /* check leases (only) on local system not remote */
bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
bool need_reconnect:1; /* connection reset, tid now invalid */
+#ifdef CONFIG_CIFS_FSCACHE
+ u64 resource_id; /* server resource id */
+ struct fscache_cookie *fscache; /* cookie for share */
+#endif
/* BB add field for back pointer to sb struct(s)? */
};
@@ -398,6 +391,9 @@ struct cifsInodeInfo {
bool invalid_mapping:1; /* pagecache is invalid */
u64 server_eof; /* current file size on server */
u64 uniqueid; /* server inode number */
+#ifdef CONFIG_CIFS_FSCACHE
+ struct fscache_cookie *fscache;
+#endif
struct inode vfs_inode;
};
@@ -733,3 +729,5 @@ GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
extern const struct slow_work_ops cifs_oplock_break_ops;
+
+#endif /* _CIFS_GLOB_H */
diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index fb1657e0fdb..2eaebbd3113 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -86,7 +86,9 @@ extern unsigned int smbCalcSize(struct smb_hdr *ptr);
extern unsigned int smbCalcSize_LE(struct smb_hdr *ptr);
extern int decode_negTokenInit(unsigned char *security_blob, int length,
struct TCP_Server_Info *server);
-extern int cifs_convert_address(char *src, void *dst);
+extern int cifs_convert_address(struct sockaddr *dst, char *src);
+extern int cifs_fill_sockaddr(struct sockaddr *dst, char *src,
+ unsigned short int port);
extern int map_smb_to_linux_error(struct smb_hdr *smb, int logErr);
extern void header_assemble(struct smb_hdr *, char /* command */ ,
const struct cifsTconInfo *, int /* length of
@@ -106,7 +108,6 @@ extern struct cifsFileInfo *cifs_new_fileinfo(struct inode *newinode,
__u16 fileHandle, struct file *file,
struct vfsmount *mnt, unsigned int oflags);
extern int cifs_posix_open(char *full_path, struct inode **pinode,
- struct vfsmount *mnt,
struct super_block *sb,
int mode, int oflags,
__u32 *poplock, __u16 *pnetfid, int xid);
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 2208f06e4c4..2a43a0aca96 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -48,6 +48,7 @@
#include "nterr.h"
#include "rfc1002pdu.h"
#include "cn_cifs.h"
+#include "fscache.h"
#define CIFS_PORT 445
#define RFC1001_PORT 139
@@ -66,6 +67,7 @@ struct smb_vol {
char *iocharset; /* local code page for mapping to and from Unicode */
char source_rfc1001_name[16]; /* netbios name of client */
char target_rfc1001_name[16]; /* netbios name of server for Win9x/ME */
+ uid_t cred_uid;
uid_t linux_uid;
gid_t linux_gid;
mode_t file_mode;
@@ -97,6 +99,7 @@ struct smb_vol {
bool noblocksnd:1;
bool noautotune:1;
bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
+ bool fsc:1; /* enable fscache */
unsigned int rsize;
unsigned int wsize;
bool sockopt_tcp_nodelay:1;
@@ -830,7 +833,8 @@ cifs_parse_mount_options(char *options, const char *devname,
/* null target name indicates to use *SMBSERVR default called name
if we end up sending RFC1001 session initialize */
vol->target_rfc1001_name[0] = 0;
- vol->linux_uid = current_uid(); /* use current_euid() instead? */
+ vol->cred_uid = current_uid();
+ vol->linux_uid = current_uid();
vol->linux_gid = current_gid();
/* default to only allowing write access to owner of the mount */
@@ -1257,6 +1261,12 @@ cifs_parse_mount_options(char *options, const char *devname,
} else if ((strnicmp(data, "nocase", 6) == 0) ||
(strnicmp(data, "ignorecase", 10) == 0)) {
vol->nocase = 1;
+ } else if (strnicmp(data, "mand", 4) == 0) {
+ /* ignore */
+ } else if (strnicmp(data, "nomand", 6) == 0) {
+ /* ignore */
+ } else if (strnicmp(data, "_netdev", 7) == 0) {
+ /* ignore */
} else if (strnicmp(data, "brl", 3) == 0) {
vol->nobrl = 0;
} else if ((strnicmp(data, "nobrl", 5) == 0) ||
@@ -1331,6 +1341,8 @@ cifs_parse_mount_options(char *options, const char *devname,
printk(KERN_WARNING "CIFS: Mount option noac not "
"supported. Instead set "
"/proc/fs/cifs/LookupCacheEnabled to 0\n");
+ } else if (strnicmp(data, "fsc", 3) == 0) {
+ vol->fsc = true;
} else
printk(KERN_WARNING "CIFS: Unknown mount option %s\n",
data);
@@ -1380,18 +1392,92 @@ cifs_parse_mount_options(char *options, const char *devname,
return 0;
}
+static bool
+match_address(struct TCP_Server_Info *server, struct sockaddr *addr)
+{
+ struct sockaddr_in *addr4 = (struct sockaddr_in *)addr;
+ struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr;
+
+ switch (addr->sa_family) {
+ case AF_INET:
+ if (addr4->sin_addr.s_addr !=
+ server->addr.sockAddr.sin_addr.s_addr)
+ return false;
+ if (addr4->sin_port &&
+ addr4->sin_port != server->addr.sockAddr.sin_port)
+ return false;
+ break;
+ case AF_INET6:
+ if (!ipv6_addr_equal(&addr6->sin6_addr,
+ &server->addr.sockAddr6.sin6_addr))
+ return false;
+ if (addr6->sin6_scope_id !=
+ server->addr.sockAddr6.sin6_scope_id)
+ return false;
+ if (addr6->sin6_port &&
+ addr6->sin6_port != server->addr.sockAddr6.sin6_port)
+ return false;
+ break;
+ }
+
+ return true;
+}
+
+static bool
+match_security(struct TCP_Server_Info *server, struct smb_vol *vol)
+{
+ unsigned int secFlags;
+
+ if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL)))
+ secFlags = vol->secFlg;
+ else
+ secFlags = global_secflags | vol->secFlg;
+
+ switch (server->secType) {
+ case LANMAN:
+ if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT)))
+ return false;
+ break;
+ case NTLMv2:
+ if (!(secFlags & CIFSSEC_MAY_NTLMV2))
+ return false;
+ break;
+ case NTLM:
+ if (!(secFlags & CIFSSEC_MAY_NTLM))
+ return false;
+ break;
+ case Kerberos:
+ if (!(secFlags & CIFSSEC_MAY_KRB5))
+ return false;
+ break;
+ case RawNTLMSSP:
+ if (!(secFlags & CIFSSEC_MAY_NTLMSSP))
+ return false;
+ break;
+ default:
+ /* shouldn't happen */
+ return false;
+ }
+
+ /* now check if signing mode is acceptible */
+ if ((secFlags & CIFSSEC_MAY_SIGN) == 0 &&
+ (server->secMode & SECMODE_SIGN_REQUIRED))
+ return false;
+ else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) &&
+ (server->secMode &
+ (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0)
+ return false;
+
+ return true;
+}
+
static struct TCP_Server_Info *
-cifs_find_tcp_session(struct sockaddr_storage *addr, unsigned short int port)
+cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol)
{
- struct list_head *tmp;
struct TCP_Server_Info *server;
- struct sockaddr_in *addr4 = (struct sockaddr_in *) addr;
- struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *) addr;
write_lock(&cifs_tcp_ses_lock);
- list_for_each(tmp, &cifs_tcp_ses_list) {
- server = list_entry(tmp, struct TCP_Server_Info,
- tcp_ses_list);
+ list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
/*
* the demux thread can exit on its own while still in CifsNew
* so don't accept any sockets in that state. Since the
@@ -1401,37 +1487,11 @@ cifs_find_tcp_session(struct sockaddr_storage *addr, unsigned short int port)
if (server->tcpStatus == CifsNew)
continue;
- switch (addr->ss_family) {
- case AF_INET:
- if (addr4->sin_addr.s_addr ==
- server->addr.sockAddr.sin_addr.s_addr) {
- addr4->sin_port = htons(port);
- /* user overrode default port? */
- if (addr4->sin_port) {
- if (addr4->sin_port !=
- server->addr.sockAddr.sin_port)
- continue;
- }
- break;
- } else
- continue;
+ if (!match_address(server, addr))
+ continue;
- case AF_INET6:
- if (ipv6_addr_equal(&addr6->sin6_addr,
- &server->addr.sockAddr6.sin6_addr) &&
- (addr6->sin6_scope_id ==
- server->addr.sockAddr6.sin6_scope_id)) {
- addr6->sin6_port = htons(port);
- /* user overrode default port? */
- if (addr6->sin6_port) {
- if (addr6->sin6_port !=
- server->addr.sockAddr6.sin6_port)
- continue;
- }
- break;
- } else
- continue;
- }
+ if (!match_security(server, vol))
+ continue;
++server->srv_count;
write_unlock(&cifs_tcp_ses_lock);
@@ -1460,6 +1520,8 @@ cifs_put_tcp_session(struct TCP_Server_Info *server)
server->tcpStatus = CifsExiting;
spin_unlock(&GlobalMid_Lock);
+ cifs_fscache_release_client_cookie(server);
+
task = xchg(&server->tsk, NULL);
if (task)
force_sig(SIGKILL, task);
@@ -1479,7 +1541,9 @@ cifs_get_tcp_session(struct smb_vol *volume_info)
cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip);
if (volume_info->UNCip && volume_info->UNC) {
- rc = cifs_convert_address(volume_info->UNCip, &addr);
+ rc = cifs_fill_sockaddr((struct sockaddr *)&addr,
+ volume_info->UNCip,
+ volume_info->port);
if (!rc) {
/* we failed translating address */
rc = -EINVAL;
@@ -1499,7 +1563,7 @@ cifs_get_tcp_session(struct smb_vol *volume_info)
}
/* see if we already have a matching tcp_ses */
- tcp_ses = cifs_find_tcp_session(&addr, volume_info->port);
+ tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info);
if (tcp_ses)
return tcp_ses;
@@ -1543,12 +1607,10 @@ cifs_get_tcp_session(struct smb_vol *volume_info)
cFYI(1, "attempting ipv6 connect");
/* BB should we allow ipv6 on port 139? */
/* other OS never observed in Wild doing 139 with v6 */
- sin_server6->sin6_port = htons(volume_info->port);
memcpy(&tcp_ses->addr.sockAddr6, sin_server6,
sizeof(struct sockaddr_in6));
rc = ipv6_connect(tcp_ses);
} else {
- sin_server->sin_port = htons(volume_info->port);
memcpy(&tcp_ses->addr.sockAddr, sin_server,
sizeof(struct sockaddr_in));
rc = ipv4_connect(tcp_ses);
@@ -1577,6 +1639,8 @@ cifs_get_tcp_session(struct smb_vol *volume_info)
list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
write_unlock(&cifs_tcp_ses_lock);
+ cifs_fscache_get_client_cookie(tcp_ses);
+
return tcp_ses;
out_err:
@@ -1591,17 +1655,27 @@ out_err:
}
static struct cifsSesInfo *
-cifs_find_smb_ses(struct TCP_Server_Info *server, char *username)
+cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol)
{
- struct list_head *tmp;
struct cifsSesInfo *ses;
write_lock(&cifs_tcp_ses_lock);
- list_for_each(tmp, &server->smb_ses_list) {
- ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
- if (strncmp(ses->userName, username, MAX_USERNAME_SIZE))
- continue;
-
+ list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
+ switch (server->secType) {
+ case Kerberos:
+ if (vol->cred_uid != ses->cred_uid)
+ continue;
+ break;
+ default:
+ /* anything else takes username/password */
+ if (strncmp(ses->userName, vol->username,
+ MAX_USERNAME_SIZE))
+ continue;
+ if (strlen(vol->username) != 0 &&
+ strncmp(ses->password, vol->password,
+ MAX_PASSWORD_SIZE))
+ continue;
+ }
++ses->ses_count;
write_unlock(&cifs_tcp_ses_lock);
return ses;
@@ -1643,7 +1717,7 @@ cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
xid = GetXid();
- ses = cifs_find_smb_ses(server, volume_info->username);
+ ses = cifs_find_smb_ses(server, volume_info);
if (ses) {
cFYI(1, "Existing smb sess found (status=%d)", ses->status);
@@ -1706,6 +1780,7 @@ cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
if (ses->domainName)
strcpy(ses->domainName, volume_info->domainname);
}
+ ses->cred_uid = volume_info->cred_uid;
ses->linux_uid = volume_info->linux_uid;
ses->overrideSecFlg = volume_info->secFlg;
@@ -1773,6 +1848,7 @@ cifs_put_tcon(struct cifsTconInfo *tcon)
CIFSSMBTDis(xid, tcon);
_FreeXid(xid);
+ cifs_fscache_release_super_cookie(tcon);
tconInfoFree(tcon);
cifs_put_smb_ses(ses);
}
@@ -1843,6 +1919,8 @@ cifs_get_tcon(struct cifsSesInfo *ses, struct smb_vol *volume_info)
list_add(&tcon->tcon_list, &ses->tcon_list);
write_unlock(&cifs_tcp_ses_lock);
+ cifs_fscache_get_super_cookie(tcon);
+
return tcon;
out_fail:
@@ -2397,6 +2475,8 @@ static void setup_cifs_sb(struct smb_vol *pvolume_info,
cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
if (pvolume_info->dynperm)
cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
+ if (pvolume_info->fsc)
+ cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE;
if (pvolume_info->direct_io) {
cFYI(1, "mounting share using direct i/o");
cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index 391816b461c..a7de5e9fff1 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -25,6 +25,7 @@
#include <linux/slab.h>
#include <linux/namei.h>
#include <linux/mount.h>
+#include <linux/file.h>
#include "cifsfs.h"
#include "cifspdu.h"
#include "cifsglob.h"
@@ -129,12 +130,6 @@ cifs_bp_rename_retry:
return full_path;
}
-/*
- * When called with struct file pointer set to NULL, there is no way we could
- * update file->private_data, but getting it stuck on openFileList provides a
- * way to access it from cifs_fill_filedata and thereby set file->private_data
- * from cifs_open.
- */
struct cifsFileInfo *
cifs_new_fileinfo(struct inode *newinode, __u16 fileHandle,
struct file *file, struct vfsmount *mnt, unsigned int oflags)
@@ -184,12 +179,13 @@ cifs_new_fileinfo(struct inode *newinode, __u16 fileHandle,
}
write_unlock(&GlobalSMBSeslock);
+ file->private_data = pCifsFile;
+
return pCifsFile;
}
int cifs_posix_open(char *full_path, struct inode **pinode,
- struct vfsmount *mnt, struct super_block *sb,
- int mode, int oflags,
+ struct super_block *sb, int mode, int oflags,
__u32 *poplock, __u16 *pnetfid, int xid)
{
int rc;
@@ -258,19 +254,6 @@ int cifs_posix_open(char *full_path, struct inode **pinode,
cifs_fattr_to_inode(*pinode, &fattr);
}
- /*
- * cifs_fill_filedata() takes care of setting cifsFileInfo pointer to
- * file->private_data.
- */
- if (mnt) {
- struct cifsFileInfo *pfile_info;
-
- pfile_info = cifs_new_fileinfo(*pinode, *pnetfid, NULL, mnt,
- oflags);
- if (pfile_info == NULL)
- rc = -ENOMEM;
- }
-
posix_open_ret:
kfree(presp_data);
return rc;
@@ -298,7 +281,6 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
int create_options = CREATE_NOT_DIR;
__u32 oplock = 0;
int oflags;
- bool posix_create = false;
/*
* BB below access is probably too much for mknod to request
* but we have to do query and setpathinfo so requesting
@@ -339,7 +321,6 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
(CIFS_UNIX_POSIX_PATH_OPS_CAP &
le64_to_cpu(tcon->fsUnixInfo.Capability))) {
rc = cifs_posix_open(full_path, &newinode,
- nd ? nd->path.mnt : NULL,
inode->i_sb, mode, oflags, &oplock, &fileHandle, xid);
/* EIO could indicate that (posix open) operation is not
supported, despite what server claimed in capability
@@ -347,7 +328,6 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
handled in posix open */
if (rc == 0) {
- posix_create = true;
if (newinode == NULL) /* query inode info */
goto cifs_create_get_file_info;
else /* success, no need to query */
@@ -478,21 +458,28 @@ cifs_create_set_dentry:
else
cFYI(1, "Create worked, get_inode_info failed rc = %d", rc);
- /* nfsd case - nfs srv does not set nd */
- if ((nd == NULL) || (!(nd->flags & LOOKUP_OPEN))) {
- /* mknod case - do not leave file open */
- CIFSSMBClose(xid, tcon, fileHandle);
- } else if (!(posix_create) && (newinode)) {
+ if (newinode && nd && (nd->flags & LOOKUP_OPEN)) {
struct cifsFileInfo *pfile_info;
- /*
- * cifs_fill_filedata() takes care of setting cifsFileInfo
- * pointer to file->private_data.
- */
- pfile_info = cifs_new_fileinfo(newinode, fileHandle, NULL,
+ struct file *filp;
+
+ filp = lookup_instantiate_filp(nd, direntry, generic_file_open);
+ if (IS_ERR(filp)) {
+ rc = PTR_ERR(filp);
+ CIFSSMBClose(xid, tcon, fileHandle);
+ goto cifs_create_out;
+ }
+
+ pfile_info = cifs_new_fileinfo(newinode, fileHandle, filp,
nd->path.mnt, oflags);
- if (pfile_info == NULL)
+ if (pfile_info == NULL) {
+ fput(filp);
+ CIFSSMBClose(xid, tcon, fileHandle);
rc = -ENOMEM;
+ }
+ } else {
+ CIFSSMBClose(xid, tcon, fileHandle);
}
+
cifs_create_out:
kfree(buf);
kfree(full_path);
@@ -636,6 +623,7 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
bool posix_open = false;
struct cifs_sb_info *cifs_sb;
struct cifsTconInfo *pTcon;
+ struct cifsFileInfo *cfile;
struct inode *newInode = NULL;
char *full_path = NULL;
struct file *filp;
@@ -703,7 +691,7 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
if (nd && !(nd->flags & (LOOKUP_PARENT | LOOKUP_DIRECTORY)) &&
(nd->flags & LOOKUP_OPEN) && !pTcon->broken_posix_open &&
(nd->intent.open.flags & O_CREAT)) {
- rc = cifs_posix_open(full_path, &newInode, nd->path.mnt,
+ rc = cifs_posix_open(full_path, &newInode,
parent_dir_inode->i_sb,
nd->intent.open.create_mode,
nd->intent.open.flags, &oplock,
@@ -733,8 +721,25 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
else
direntry->d_op = &cifs_dentry_ops;
d_add(direntry, newInode);
- if (posix_open)
- filp = lookup_instantiate_filp(nd, direntry, NULL);
+ if (posix_open) {
+ filp = lookup_instantiate_filp(nd, direntry,
+ generic_file_open);
+ if (IS_ERR(filp)) {
+ rc = PTR_ERR(filp);
+ CIFSSMBClose(xid, pTcon, fileHandle);
+ goto lookup_out;
+ }
+
+ cfile = cifs_new_fileinfo(newInode, fileHandle, filp,
+ nd->path.mnt,
+ nd->intent.open.flags);
+ if (cfile == NULL) {
+ fput(filp);
+ CIFSSMBClose(xid, pTcon, fileHandle);
+ rc = -ENOMEM;
+ goto lookup_out;
+ }
+ }
/* since paths are not looked up by component - the parent
directories are presumed to be good here */
renew_parental_timestamps(direntry);
@@ -755,6 +760,7 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
is a common return code */
}
+lookup_out:
kfree(full_path);
FreeXid(xid);
return ERR_PTR(rc);
diff --git a/fs/cifs/dns_resolve.c b/fs/cifs/dns_resolve.c
index 4db2c5e7283..3ad7f4300c4 100644
--- a/fs/cifs/dns_resolve.c
+++ b/fs/cifs/dns_resolve.c
@@ -24,12 +24,16 @@
*/
#include <linux/slab.h>
+#include <linux/keyctl.h>
+#include <linux/key-type.h>
#include <keys/user-type.h>
#include "dns_resolve.h"
#include "cifsglob.h"
#include "cifsproto.h"
#include "cifs_debug.h"
+static const struct cred *dns_resolver_cache;
+
/* Checks if supplied name is IP address
* returns:
* 1 - name is IP
@@ -40,7 +44,7 @@ is_ip(char *name)
{
struct sockaddr_storage ss;
- return cifs_convert_address(name, &ss);
+ return cifs_convert_address((struct sockaddr *)&ss, name);
}
static int
@@ -94,6 +98,7 @@ struct key_type key_type_dns_resolver = {
int
dns_resolve_server_name_to_ip(const char *unc, char **ip_addr)
{
+ const struct cred *saved_cred;
int rc = -EAGAIN;
struct key *rkey = ERR_PTR(-EAGAIN);
char *name;
@@ -133,8 +138,15 @@ dns_resolve_server_name_to_ip(const char *unc, char **ip_addr)
goto skip_upcall;
}
+ saved_cred = override_creds(dns_resolver_cache);
rkey = request_key(&key_type_dns_resolver, name, "");
+ revert_creds(saved_cred);
if (!IS_ERR(rkey)) {
+ if (!(rkey->perm & KEY_USR_VIEW)) {
+ down_read(&rkey->sem);
+ rkey->perm |= KEY_USR_VIEW;
+ up_read(&rkey->sem);
+ }
len = rkey->type_data.x[0];
data = rkey->payload.data;
} else {
@@ -165,4 +177,61 @@ out:
return rc;
}
+int __init cifs_init_dns_resolver(void)
+{
+ struct cred *cred;
+ struct key *keyring;
+ int ret;
+
+ printk(KERN_NOTICE "Registering the %s key type\n",
+ key_type_dns_resolver.name);
+
+ /* create an override credential set with a special thread keyring in
+ * which DNS requests are cached
+ *
+ * this is used to prevent malicious redirections from being installed
+ * with add_key().
+ */
+ cred = prepare_kernel_cred(NULL);
+ if (!cred)
+ return -ENOMEM;
+
+ keyring = key_alloc(&key_type_keyring, ".dns_resolver", 0, 0, cred,
+ (KEY_POS_ALL & ~KEY_POS_SETATTR) |
+ KEY_USR_VIEW | KEY_USR_READ,
+ KEY_ALLOC_NOT_IN_QUOTA);
+ if (IS_ERR(keyring)) {
+ ret = PTR_ERR(keyring);
+ goto failed_put_cred;
+ }
+
+ ret = key_instantiate_and_link(keyring, NULL, 0, NULL, NULL);
+ if (ret < 0)
+ goto failed_put_key;
+
+ ret = register_key_type(&key_type_dns_resolver);
+ if (ret < 0)
+ goto failed_put_key;
+
+ /* instruct request_key() to use this special keyring as a cache for
+ * the results it looks up */
+ cred->thread_keyring = keyring;
+ cred->jit_keyring = KEY_REQKEY_DEFL_THREAD_KEYRING;
+ dns_resolver_cache = cred;
+ return 0;
+
+failed_put_key:
+ key_put(keyring);
+failed_put_cred:
+ put_cred(cred);
+ return ret;
+}
+void cifs_exit_dns_resolver(void)
+{
+ key_revoke(dns_resolver_cache->thread_keyring);
+ unregister_key_type(&key_type_dns_resolver);
+ put_cred(dns_resolver_cache);
+ printk(KERN_NOTICE "Unregistered %s key type\n",
+ key_type_dns_resolver.name);
+}
diff --git a/fs/cifs/dns_resolve.h b/fs/cifs/dns_resolve.h
index 966e9288930..5d7f291df16 100644
--- a/fs/cifs/dns_resolve.h
+++ b/fs/cifs/dns_resolve.h
@@ -24,8 +24,8 @@
#define _DNS_RESOLVE_H
#ifdef __KERNEL__
-#include <linux/key-type.h>
-extern struct key_type key_type_dns_resolver;
+extern int __init cifs_init_dns_resolver(void);
+extern void cifs_exit_dns_resolver(void);
extern int dns_resolve_server_name_to_ip(const char *unc, char **ip_addr);
#endif /* KERNEL */
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 75541af4b3d..fa04a00d126 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -40,6 +40,7 @@
#include "cifs_unicode.h"
#include "cifs_debug.h"
#include "cifs_fs_sb.h"
+#include "fscache.h"
static inline int cifs_convert_flags(unsigned int flags)
{
@@ -162,44 +163,12 @@ psx_client_can_cache:
return 0;
}
-static struct cifsFileInfo *
-cifs_fill_filedata(struct file *file)
-{
- struct list_head *tmp;
- struct cifsFileInfo *pCifsFile = NULL;
- struct cifsInodeInfo *pCifsInode = NULL;
-
- /* search inode for this file and fill in file->private_data */
- pCifsInode = CIFS_I(file->f_path.dentry->d_inode);
- read_lock(&GlobalSMBSeslock);
- list_for_each(tmp, &pCifsInode->openFileList) {
- pCifsFile = list_entry(tmp, struct cifsFileInfo, flist);
- if ((pCifsFile->pfile == NULL) &&
- (pCifsFile->pid == current->tgid)) {
- /* mode set in cifs_create */
-
- /* needed for writepage */
- pCifsFile->pfile = file;
- file->private_data = pCifsFile;
- break;
- }
- }
- read_unlock(&GlobalSMBSeslock);
-
- if (file->private_data != NULL) {
- return pCifsFile;
- } else if ((file->f_flags & O_CREAT) && (file->f_flags & O_EXCL))
- cERROR(1, "could not find file instance for "
- "new file %p", file);
- return NULL;
-}
-
/* all arguments to this function must be checked for validity in caller */
-static inline int cifs_open_inode_helper(struct inode *inode, struct file *file,
- struct cifsInodeInfo *pCifsInode, struct cifsFileInfo *pCifsFile,
+static inline int cifs_open_inode_helper(struct inode *inode,
struct cifsTconInfo *pTcon, int *oplock, FILE_ALL_INFO *buf,
char *full_path, int xid)
{
+ struct cifsInodeInfo *pCifsInode = CIFS_I(inode);
struct timespec temp;
int rc;
@@ -213,36 +182,35 @@ static inline int cifs_open_inode_helper(struct inode *inode, struct file *file,
/* if not oplocked, invalidate inode pages if mtime or file
size changed */
temp = cifs_NTtimeToUnix(buf->LastWriteTime);
- if (timespec_equal(&file->f_path.dentry->d_inode->i_mtime, &temp) &&
- (file->f_path.dentry->d_inode->i_size ==
+ if (timespec_equal(&inode->i_mtime, &temp) &&
+ (inode->i_size ==
(loff_t)le64_to_cpu(buf->EndOfFile))) {
cFYI(1, "inode unchanged on server");
} else {
- if (file->f_path.dentry->d_inode->i_mapping) {
+ if (inode->i_mapping) {
/* BB no need to lock inode until after invalidate
since namei code should already have it locked? */
- rc = filemap_write_and_wait(file->f_path.dentry->d_inode->i_mapping);
+ rc = filemap_write_and_wait(inode->i_mapping);
if (rc != 0)
- CIFS_I(file->f_path.dentry->d_inode)->write_behind_rc = rc;
+ pCifsInode->write_behind_rc = rc;
}
cFYI(1, "invalidating remote inode since open detected it "
"changed");
- invalidate_remote_inode(file->f_path.dentry->d_inode);
+ invalidate_remote_inode(inode);
}
client_can_cache:
if (pTcon->unix_ext)
- rc = cifs_get_inode_info_unix(&file->f_path.dentry->d_inode,
- full_path, inode->i_sb, xid);
+ rc = cifs_get_inode_info_unix(&inode, full_path, inode->i_sb,
+ xid);
else
- rc = cifs_get_inode_info(&file->f_path.dentry->d_inode,
- full_path, buf, inode->i_sb, xid, NULL);
+ rc = cifs_get_inode_info(&inode, full_path, buf, inode->i_sb,
+ xid, NULL);
if ((*oplock & 0xF) == OPLOCK_EXCLUSIVE) {
pCifsInode->clientCanCacheAll = true;
pCifsInode->clientCanCacheRead = true;
- cFYI(1, "Exclusive Oplock granted on inode %p",
- file->f_path.dentry->d_inode);
+ cFYI(1, "Exclusive Oplock granted on inode %p", inode);
} else if ((*oplock & 0xF) == OPLOCK_READ)
pCifsInode->clientCanCacheRead = true;
@@ -256,7 +224,7 @@ int cifs_open(struct inode *inode, struct file *file)
__u32 oplock;
struct cifs_sb_info *cifs_sb;
struct cifsTconInfo *tcon;
- struct cifsFileInfo *pCifsFile;
+ struct cifsFileInfo *pCifsFile = NULL;
struct cifsInodeInfo *pCifsInode;
char *full_path = NULL;
int desiredAccess;
@@ -270,12 +238,6 @@ int cifs_open(struct inode *inode, struct file *file)
tcon = cifs_sb->tcon;
pCifsInode = CIFS_I(file->f_path.dentry->d_inode);
- pCifsFile = cifs_fill_filedata(file);
- if (pCifsFile) {
- rc = 0;
- FreeXid(xid);
- return rc;
- }
full_path = build_path_from_dentry(file->f_path.dentry);
if (full_path == NULL) {
@@ -299,8 +261,7 @@ int cifs_open(struct inode *inode, struct file *file)
int oflags = (int) cifs_posix_convert_flags(file->f_flags);
oflags |= SMB_O_CREAT;
/* can not refresh inode info since size could be stale */
- rc = cifs_posix_open(full_path, &inode, file->f_path.mnt,
- inode->i_sb,
+ rc = cifs_posix_open(full_path, &inode, inode->i_sb,
cifs_sb->mnt_file_mode /* ignored */,
oflags, &oplock, &netfid, xid);
if (rc == 0) {
@@ -308,9 +269,23 @@ int cifs_open(struct inode *inode, struct file *file)
/* no need for special case handling of setting mode
on read only files needed here */
- pCifsFile = cifs_fill_filedata(file);
- cifs_posix_open_inode_helper(inode, file, pCifsInode,
- oplock, netfid);
+ rc = cifs_posix_open_inode_helper(inode, file,
+ pCifsInode, oplock, netfid);
+ if (rc != 0) {
+ CIFSSMBClose(xid, tcon, netfid);
+ goto out;
+ }
+
+ pCifsFile = cifs_new_fileinfo(inode, netfid, file,
+ file->f_path.mnt,
+ oflags);
+ if (pCifsFile == NULL) {
+ CIFSSMBClose(xid, tcon, netfid);
+ rc = -ENOMEM;
+ }
+
+ cifs_fscache_set_inode_cookie(inode, file);
+
goto out;
} else if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
if (tcon->ses->serverNOS)
@@ -391,16 +366,18 @@ int cifs_open(struct inode *inode, struct file *file)
goto out;
}
+ rc = cifs_open_inode_helper(inode, tcon, &oplock, buf, full_path, xid);
+ if (rc != 0)
+ goto out;
+
pCifsFile = cifs_new_fileinfo(inode, netfid, file, file->f_path.mnt,
file->f_flags);
- file->private_data = pCifsFile;
- if (file->private_data == NULL) {
+ if (pCifsFile == NULL) {
rc = -ENOMEM;
goto out;
}
- rc = cifs_open_inode_helper(inode, file, pCifsInode, pCifsFile, tcon,
- &oplock, buf, full_path, xid);
+ cifs_fscache_set_inode_cookie(inode, file);
if (oplock & CIFS_CREATE_ACTION) {
/* time to set mode which we can not set earlier due to
@@ -456,7 +433,7 @@ static int cifs_reopen_file(struct file *file, bool can_flush)
__u16 netfid;
if (file->private_data)
- pCifsFile = (struct cifsFileInfo *)file->private_data;
+ pCifsFile = file->private_data;
else
return -EBADF;
@@ -513,8 +490,7 @@ reopen_error_exit:
le64_to_cpu(tcon->fsUnixInfo.Capability))) {
int oflags = (int) cifs_posix_convert_flags(file->f_flags);
/* can not refresh inode info since size could be stale */
- rc = cifs_posix_open(full_path, NULL, file->f_path.mnt,
- inode->i_sb,
+ rc = cifs_posix_open(full_path, NULL, inode->i_sb,
cifs_sb->mnt_file_mode /* ignored */,
oflags, &oplock, &netfid, xid);
if (rc == 0) {
@@ -595,8 +571,7 @@ int cifs_close(struct inode *inode, struct file *file)
int xid, timeout;
struct cifs_sb_info *cifs_sb;
struct cifsTconInfo *pTcon;
- struct cifsFileInfo *pSMBFile =
- (struct cifsFileInfo *)file->private_data;
+ struct cifsFileInfo *pSMBFile = file->private_data;
xid = GetXid();
@@ -671,8 +646,7 @@ int cifs_closedir(struct inode *inode, struct file *file)
{
int rc = 0;
int xid;
- struct cifsFileInfo *pCFileStruct =
- (struct cifsFileInfo *)file->private_data;
+ struct cifsFileInfo *pCFileStruct = file->private_data;
char *ptmp;
cFYI(1, "Closedir inode = 0x%p", inode);
@@ -893,8 +867,7 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *pfLock)
length, pfLock,
posix_lock_type, wait_flag);
} else {
- struct cifsFileInfo *fid =
- (struct cifsFileInfo *)file->private_data;
+ struct cifsFileInfo *fid = file->private_data;
if (numLock) {
rc = CIFSSMBLock(xid, tcon, netfid, length,
@@ -995,7 +968,7 @@ ssize_t cifs_user_write(struct file *file, const char __user *write_data,
if (file->private_data == NULL)
return -EBADF;
- open_file = (struct cifsFileInfo *) file->private_data;
+ open_file = file->private_data;
rc = generic_write_checks(file, poffset, &write_size, 0);
if (rc)
@@ -1097,7 +1070,7 @@ static ssize_t cifs_write(struct file *file, const char *write_data,
if (file->private_data == NULL)
return -EBADF;
- open_file = (struct cifsFileInfo *)file->private_data;
+ open_file = file->private_data;
xid = GetXid();
@@ -1681,8 +1654,7 @@ int cifs_fsync(struct file *file, int datasync)
int xid;
int rc = 0;
struct cifsTconInfo *tcon;
- struct cifsFileInfo *smbfile =
- (struct cifsFileInfo *)file->private_data;
+ struct cifsFileInfo *smbfile = file->private_data;
struct inode *inode = file->f_path.dentry->d_inode;
xid = GetXid();
@@ -1786,7 +1758,7 @@ ssize_t cifs_user_read(struct file *file, char __user *read_data,
FreeXid(xid);
return rc;
}
- open_file = (struct cifsFileInfo *)file->private_data;
+ open_file = file->private_data;
if ((file->f_flags & O_ACCMODE) == O_WRONLY)
cFYI(1, "attempting read on write only file instance");
@@ -1867,7 +1839,7 @@ static ssize_t cifs_read(struct file *file, char *read_data, size_t read_size,
FreeXid(xid);
return rc;
}
- open_file = (struct cifsFileInfo *)file->private_data;
+ open_file = file->private_data;
if ((file->f_flags & O_ACCMODE) == O_WRONLY)
cFYI(1, "attempting read on write only file instance");
@@ -1972,6 +1944,9 @@ static void cifs_copy_cache_pages(struct address_space *mapping,
SetPageUptodate(page);
unlock_page(page);
data += PAGE_CACHE_SIZE;
+
+ /* add page to FS-Cache */
+ cifs_readpage_to_fscache(mapping->host, page);
}
return;
}
@@ -1998,10 +1973,19 @@ static int cifs_readpages(struct file *file, struct address_space *mapping,
FreeXid(xid);
return rc;
}
- open_file = (struct cifsFileInfo *)file->private_data;
+ open_file = file->private_data;
cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
pTcon = cifs_sb->tcon;
+ /*
+ * Reads as many pages as possible from fscache. Returns -ENOBUFS
+ * immediately if the cookie is negative
+ */
+ rc = cifs_readpages_from_fscache(mapping->host, mapping, page_list,
+ &num_pages);
+ if (rc == 0)
+ goto read_complete;
+
cFYI(DBG2, "rpages: num pages %d", num_pages);
for (i = 0; i < num_pages; ) {
unsigned contig_pages;
@@ -2112,6 +2096,7 @@ static int cifs_readpages(struct file *file, struct address_space *mapping,
smb_read_data = NULL;
}
+read_complete:
FreeXid(xid);
return rc;
}
@@ -2122,6 +2107,11 @@ static int cifs_readpage_worker(struct file *file, struct page *page,
char *read_data;
int rc;
+ /* Is the page cached? */
+ rc = cifs_readpage_from_fscache(file->f_path.dentry->d_inode, page);
+ if (rc == 0)
+ goto read_complete;
+
page_cache_get(page);
read_data = kmap(page);
/* for reads over a certain size could initiate async read ahead */
@@ -2141,11 +2131,17 @@ static int cifs_readpage_worker(struct file *file, struct page *page,
flush_dcache_page(page);
SetPageUptodate(page);
+
+ /* send this page to the cache */
+ cifs_readpage_to_fscache(file->f_path.dentry->d_inode, page);
+
rc = 0;
io_error:
kunmap(page);
page_cache_release(page);
+
+read_complete:
return rc;
}
@@ -2295,6 +2291,22 @@ out:
return rc;
}
+static int cifs_release_page(struct page *page, gfp_t gfp)
+{
+ if (PagePrivate(page))
+ return 0;
+
+ return cifs_fscache_release_page(page, gfp);
+}
+
+static void cifs_invalidate_page(struct page *page, unsigned long offset)
+{
+ struct cifsInodeInfo *cifsi = CIFS_I(page->mapping->host);
+
+ if (offset == 0)
+ cifs_fscache_invalidate_page(page, &cifsi->vfs_inode);
+}
+
static void
cifs_oplock_break(struct slow_work *work)
{
@@ -2368,6 +2380,8 @@ const struct address_space_operations cifs_addr_ops = {
.write_begin = cifs_write_begin,
.write_end = cifs_write_end,
.set_page_dirty = __set_page_dirty_nobuffers,
+ .releasepage = cifs_release_page,
+ .invalidatepage = cifs_invalidate_page,
/* .sync_page = cifs_sync_page, */
/* .direct_IO = */
};
@@ -2384,6 +2398,8 @@ const struct address_space_operations cifs_addr_ops_smallbuf = {
.write_begin = cifs_write_begin,
.write_end = cifs_write_end,
.set_page_dirty = __set_page_dirty_nobuffers,
+ .releasepage = cifs_release_page,
+ .invalidatepage = cifs_invalidate_page,
/* .sync_page = cifs_sync_page, */
/* .direct_IO = */
};
diff --git a/fs/cifs/fscache.c b/fs/cifs/fscache.c
new file mode 100644
index 00000000000..9f3f5c4be16
--- /dev/null
+++ b/fs/cifs/fscache.c
@@ -0,0 +1,236 @@
+/*
+ * fs/cifs/fscache.c - CIFS filesystem cache interface
+ *
+ * Copyright (c) 2010 Novell, Inc.
+ * Author(s): Suresh Jayaraman (sjayaraman@suse.de>
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; either version 2.1 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include "fscache.h"
+#include "cifsglob.h"
+#include "cifs_debug.h"
+#include "cifs_fs_sb.h"
+
+void cifs_fscache_get_client_cookie(struct TCP_Server_Info *server)
+{
+ server->fscache =
+ fscache_acquire_cookie(cifs_fscache_netfs.primary_index,
+ &cifs_fscache_server_index_def, server);
+ cFYI(1, "CIFS: get client cookie (0x%p/0x%p)", server,
+ server->fscache);
+}
+
+void cifs_fscache_release_client_cookie(struct TCP_Server_Info *server)
+{
+ cFYI(1, "CIFS: release client cookie (0x%p/0x%p)", server,
+ server->fscache);
+ fscache_relinquish_cookie(server->fscache, 0);
+ server->fscache = NULL;
+}
+
+void cifs_fscache_get_super_cookie(struct cifsTconInfo *tcon)
+{
+ struct TCP_Server_Info *server = tcon->ses->server;
+
+ tcon->fscache =
+ fscache_acquire_cookie(server->fscache,
+ &cifs_fscache_super_index_def, tcon);
+ cFYI(1, "CIFS: get superblock cookie (0x%p/0x%p)",
+ server->fscache, tcon->fscache);
+}
+
+void cifs_fscache_release_super_cookie(struct cifsTconInfo *tcon)
+{
+ cFYI(1, "CIFS: releasing superblock cookie (0x%p)", tcon->fscache);
+ fscache_relinquish_cookie(tcon->fscache, 0);
+ tcon->fscache = NULL;
+}
+
+static void cifs_fscache_enable_inode_cookie(struct inode *inode)
+{
+ struct cifsInodeInfo *cifsi = CIFS_I(inode);
+ struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+
+ if (cifsi->fscache)
+ return;
+
+ cifsi->fscache = fscache_acquire_cookie(cifs_sb->tcon->fscache,
+ &cifs_fscache_inode_object_def,
+ cifsi);
+ cFYI(1, "CIFS: got FH cookie (0x%p/0x%p)",
+ cifs_sb->tcon->fscache, cifsi->fscache);
+}
+
+void cifs_fscache_release_inode_cookie(struct inode *inode)
+{
+ struct cifsInodeInfo *cifsi = CIFS_I(inode);
+
+ if (cifsi->fscache) {
+ cFYI(1, "CIFS releasing inode cookie (0x%p)",
+ cifsi->fscache);
+ fscache_relinquish_cookie(cifsi->fscache, 0);
+ cifsi->fscache = NULL;
+ }
+}
+
+static void cifs_fscache_disable_inode_cookie(struct inode *inode)
+{
+ struct cifsInodeInfo *cifsi = CIFS_I(inode);
+
+ if (cifsi->fscache) {
+ cFYI(1, "CIFS disabling inode cookie (0x%p)",
+ cifsi->fscache);
+ fscache_relinquish_cookie(cifsi->fscache, 1);
+ cifsi->fscache = NULL;
+ }
+}
+
+void cifs_fscache_set_inode_cookie(struct inode *inode, struct file *filp)
+{
+ if ((filp->f_flags & O_ACCMODE) != O_RDONLY)
+ cifs_fscache_disable_inode_cookie(inode);
+ else {
+ cifs_fscache_enable_inode_cookie(inode);
+ cFYI(1, "CIFS: fscache inode cookie set");
+ }
+}
+
+void cifs_fscache_reset_inode_cookie(struct inode *inode)
+{
+ struct cifsInodeInfo *cifsi = CIFS_I(inode);
+ struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+ struct fscache_cookie *old = cifsi->fscache;
+
+ if (cifsi->fscache) {
+ /* retire the current fscache cache and get a new one */
+ fscache_relinquish_cookie(cifsi->fscache, 1);
+
+ cifsi->fscache = fscache_acquire_cookie(cifs_sb->tcon->fscache,
+ &cifs_fscache_inode_object_def,
+ cifsi);
+ cFYI(1, "CIFS: new cookie 0x%p oldcookie 0x%p",
+ cifsi->fscache, old);
+ }
+}
+
+int cifs_fscache_release_page(struct page *page, gfp_t gfp)
+{
+ if (PageFsCache(page)) {
+ struct inode *inode = page->mapping->host;
+ struct cifsInodeInfo *cifsi = CIFS_I(inode);
+
+ cFYI(1, "CIFS: fscache release page (0x%p/0x%p)",
+ page, cifsi->fscache);
+ if (!fscache_maybe_release_page(cifsi->fscache, page, gfp))
+ return 0;
+ }
+
+ return 1;
+}
+
+static void cifs_readpage_from_fscache_complete(struct page *page, void *ctx,
+ int error)
+{
+ cFYI(1, "CFS: readpage_from_fscache_complete (0x%p/%d)",
+ page, error);
+ if (!error)
+ SetPageUptodate(page);
+ unlock_page(page);
+}
+
+/*
+ * Retrieve a page from FS-Cache
+ */
+int __cifs_readpage_from_fscache(struct inode *inode, struct page *page)
+{
+ int ret;
+
+ cFYI(1, "CIFS: readpage_from_fscache(fsc:%p, p:%p, i:0x%p",
+ CIFS_I(inode)->fscache, page, inode);
+ ret = fscache_read_or_alloc_page(CIFS_I(inode)->fscache, page,
+ cifs_readpage_from_fscache_complete,
+ NULL,
+ GFP_KERNEL);
+ switch (ret) {
+
+ case 0: /* page found in fscache, read submitted */
+ cFYI(1, "CIFS: readpage_from_fscache: submitted");
+ return ret;
+ case -ENOBUFS: /* page won't be cached */
+ case -ENODATA: /* page not in cache */
+ cFYI(1, "CIFS: readpage_from_fscache %d", ret);
+ return 1;
+
+ default:
+ cERROR(1, "unknown error ret = %d", ret);
+ }
+ return ret;
+}
+
+/*
+ * Retrieve a set of pages from FS-Cache
+ */
+int __cifs_readpages_from_fscache(struct inode *inode,
+ struct address_space *mapping,
+ struct list_head *pages,
+ unsigned *nr_pages)
+{
+ int ret;
+
+ cFYI(1, "CIFS: __cifs_readpages_from_fscache (0x%p/%u/0x%p)",
+ CIFS_I(inode)->fscache, *nr_pages, inode);
+ ret = fscache_read_or_alloc_pages(CIFS_I(inode)->fscache, mapping,
+ pages, nr_pages,
+ cifs_readpage_from_fscache_complete,
+ NULL,
+ mapping_gfp_mask(mapping));
+ switch (ret) {
+ case 0: /* read submitted to the cache for all pages */
+ cFYI(1, "CIFS: readpages_from_fscache: submitted");
+ return ret;
+
+ case -ENOBUFS: /* some pages are not cached and can't be */
+ case -ENODATA: /* some pages are not cached */
+ cFYI(1, "CIFS: readpages_from_fscache: no page");
+ return 1;
+
+ default:
+ cFYI(1, "unknown error ret = %d", ret);
+ }
+
+ return ret;
+}
+
+void __cifs_readpage_to_fscache(struct inode *inode, struct page *page)
+{
+ int ret;
+
+ cFYI(1, "CIFS: readpage_to_fscache(fsc: %p, p: %p, i: %p",
+ CIFS_I(inode)->fscache, page, inode);
+ ret = fscache_write_page(CIFS_I(inode)->fscache, page, GFP_KERNEL);
+ if (ret != 0)
+ fscache_uncache_page(CIFS_I(inode)->fscache, page);
+}
+
+void __cifs_fscache_invalidate_page(struct page *page, struct inode *inode)
+{
+ struct cifsInodeInfo *cifsi = CIFS_I(inode);
+ struct fscache_cookie *cookie = cifsi->fscache;
+
+ cFYI(1, "CIFS: fscache invalidatepage (0x%p/0x%p)", page, cookie);
+ fscache_wait_on_page_write(cookie, page);
+ fscache_uncache_page(cookie, page);
+}
+
diff --git a/fs/cifs/fscache.h b/fs/cifs/fscache.h
new file mode 100644
index 00000000000..31b88ec2341
--- /dev/null
+++ b/fs/cifs/fscache.h
@@ -0,0 +1,136 @@
+/*
+ * fs/cifs/fscache.h - CIFS filesystem cache interface definitions
+ *
+ * Copyright (c) 2010 Novell, Inc.
+ * Authors(s): Suresh Jayaraman (sjayaraman@suse.de>
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; either version 2.1 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#ifndef _CIFS_FSCACHE_H
+#define _CIFS_FSCACHE_H
+
+#include <linux/fscache.h>
+
+#include "cifsglob.h"
+
+#ifdef CONFIG_CIFS_FSCACHE
+
+extern struct fscache_netfs cifs_fscache_netfs;
+extern const struct fscache_cookie_def cifs_fscache_server_index_def;
+extern const struct fscache_cookie_def cifs_fscache_super_index_def;
+extern const struct fscache_cookie_def cifs_fscache_inode_object_def;
+
+extern int cifs_fscache_register(void);
+extern void cifs_fscache_unregister(void);
+
+/*
+ * fscache.c
+ */
+extern void cifs_fscache_get_client_cookie(struct TCP_Server_Info *);
+extern void cifs_fscache_release_client_cookie(struct TCP_Server_Info *);
+extern void cifs_fscache_get_super_cookie(struct cifsTconInfo *);
+extern void cifs_fscache_release_super_cookie(struct cifsTconInfo *);
+
+extern void cifs_fscache_release_inode_cookie(struct inode *);
+extern void cifs_fscache_set_inode_cookie(struct inode *, struct file *);
+extern void cifs_fscache_reset_inode_cookie(struct inode *);
+
+extern void __cifs_fscache_invalidate_page(struct page *, struct inode *);
+extern int cifs_fscache_release_page(struct page *page, gfp_t gfp);
+extern int __cifs_readpage_from_fscache(struct inode *, struct page *);
+extern int __cifs_readpages_from_fscache(struct inode *,
+ struct address_space *,
+ struct list_head *,
+ unsigned *);
+
+extern void __cifs_readpage_to_fscache(struct inode *, struct page *);
+
+static inline void cifs_fscache_invalidate_page(struct page *page,
+ struct inode *inode)
+{
+ if (PageFsCache(page))
+ __cifs_fscache_invalidate_page(page, inode);
+}
+
+static inline int cifs_readpage_from_fscache(struct inode *inode,
+ struct page *page)
+{
+ if (CIFS_I(inode)->fscache)
+ return __cifs_readpage_from_fscache(inode, page);
+
+ return -ENOBUFS;
+}
+
+static inline int cifs_readpages_from_fscache(struct inode *inode,
+ struct address_space *mapping,
+ struct list_head *pages,
+ unsigned *nr_pages)
+{
+ if (CIFS_I(inode)->fscache)
+ return __cifs_readpages_from_fscache(inode, mapping, pages,
+ nr_pages);
+ return -ENOBUFS;
+}
+
+static inline void cifs_readpage_to_fscache(struct inode *inode,
+ struct page *page)
+{
+ if (PageFsCache(page))
+ __cifs_readpage_to_fscache(inode, page);
+}
+
+#else /* CONFIG_CIFS_FSCACHE */
+static inline int cifs_fscache_register(void) { return 0; }
+static inline void cifs_fscache_unregister(void) {}
+
+static inline void
+cifs_fscache_get_client_cookie(struct TCP_Server_Info *server) {}
+static inline void
+cifs_fscache_release_client_cookie(struct TCP_Server_Info *server) {}
+static inline void cifs_fscache_get_super_cookie(struct cifsTconInfo *tcon) {}
+static inline void
+cifs_fscache_release_super_cookie(struct cifsTconInfo *tcon) {}
+
+static inline void cifs_fscache_release_inode_cookie(struct inode *inode) {}
+static inline void cifs_fscache_set_inode_cookie(struct inode *inode,
+ struct file *filp) {}
+static inline void cifs_fscache_reset_inode_cookie(struct inode *inode) {}
+static inline int cifs_fscache_release_page(struct page *page, gfp_t gfp)
+{
+ return 1; /* May release page */
+}
+
+static inline void cifs_fscache_invalidate_page(struct page *page,
+ struct inode *inode) {}
+static inline int
+cifs_readpage_from_fscache(struct inode *inode, struct page *page)
+{
+ return -ENOBUFS;
+}
+
+static inline int cifs_readpages_from_fscache(struct inode *inode,
+ struct address_space *mapping,
+ struct list_head *pages,
+ unsigned *nr_pages)
+{
+ return -ENOBUFS;
+}
+
+static inline void cifs_readpage_to_fscache(struct inode *inode,
+ struct page *page) {}
+
+#endif /* CONFIG_CIFS_FSCACHE */
+
+#endif /* _CIFS_FSCACHE_H */
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 62b324f26a5..a15b3a9bbff 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -29,6 +29,7 @@
#include "cifsproto.h"
#include "cifs_debug.h"
#include "cifs_fs_sb.h"
+#include "fscache.h"
static void cifs_set_ops(struct inode *inode, const bool is_dfs_referral)
@@ -288,7 +289,7 @@ int cifs_get_file_info_unix(struct file *filp)
struct inode *inode = filp->f_path.dentry->d_inode;
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
struct cifsTconInfo *tcon = cifs_sb->tcon;
- struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data;
+ struct cifsFileInfo *cfile = filp->private_data;
xid = GetXid();
rc = CIFSSMBUnixQFileInfo(xid, tcon, cfile->netfid, &find_data);
@@ -515,7 +516,7 @@ int cifs_get_file_info(struct file *filp)
struct inode *inode = filp->f_path.dentry->d_inode;
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
struct cifsTconInfo *tcon = cifs_sb->tcon;
- struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data;
+ struct cifsFileInfo *cfile = filp->private_data;
xid = GetXid();
rc = CIFSSMBQFileInfo(xid, tcon, cfile->netfid, &find_data);
@@ -723,9 +724,14 @@ cifs_find_inode(struct inode *inode, void *opaque)
{
struct cifs_fattr *fattr = (struct cifs_fattr *) opaque;
+ /* don't match inode with different uniqueid */
if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid)
return 0;
+ /* don't match inode of different type */
+ if ((inode->i_mode & S_IFMT) != (fattr->cf_mode & S_IFMT))
+ return 0;
+
/*
* uh oh -- it's a directory. We can't use it since hardlinked dirs are
* verboten. Disable serverino and return it as if it were found, the
@@ -776,6 +782,10 @@ retry_iget5_locked:
inode->i_flags |= S_NOATIME | S_NOCMTIME;
if (inode->i_state & I_NEW) {
inode->i_ino = hash;
+#ifdef CONFIG_CIFS_FSCACHE
+ /* initialize per-inode cache cookie pointer */
+ CIFS_I(inode)->fscache = NULL;
+#endif
unlock_new_inode(inode);
}
}
@@ -807,6 +817,11 @@ struct inode *cifs_root_iget(struct super_block *sb, unsigned long ino)
if (!inode)
return ERR_PTR(-ENOMEM);
+#ifdef CONFIG_CIFS_FSCACHE
+ /* populate tcon->resource_id */
+ cifs_sb->tcon->resource_id = CIFS_I(inode)->uniqueid;
+#endif
+
if (rc && cifs_sb->tcon->ipc) {
cFYI(1, "ipc connection - fake read inode");
inode->i_mode |= S_IFDIR;
@@ -1401,6 +1416,10 @@ cifs_do_rename(int xid, struct dentry *from_dentry, const char *fromPath,
if (rc == 0 || rc != -ETXTBSY)
return rc;
+ /* open-file renames don't work across directories */
+ if (to_dentry->d_parent != from_dentry->d_parent)
+ return rc;
+
/* open the file to be renamed -- we need DELETE perms */
rc = CIFSSMBOpen(xid, pTcon, fromPath, FILE_OPEN, DELETE,
CREATE_NOT_DIR, &srcfid, &oplock, NULL,
@@ -1564,6 +1583,7 @@ cifs_invalidate_mapping(struct inode *inode)
cifs_i->write_behind_rc = rc;
}
invalidate_remote_inode(inode);
+ cifs_fscache_reset_inode_cookie(inode);
}
int cifs_revalidate_file(struct file *filp)
diff --git a/fs/cifs/ioctl.c b/fs/cifs/ioctl.c
index 505926f1ee6..9d38a71c8e1 100644
--- a/fs/cifs/ioctl.c
+++ b/fs/cifs/ioctl.c
@@ -41,8 +41,7 @@ long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg)
__u64 ExtAttrMask = 0;
__u64 caps;
struct cifsTconInfo *tcon;
- struct cifsFileInfo *pSMBFile =
- (struct cifsFileInfo *)filep->private_data;
+ struct cifsFileInfo *pSMBFile = filep->private_data;
#endif /* CONFIG_CIFS_POSIX */
xid = GetXid();
diff --git a/fs/cifs/netmisc.c b/fs/cifs/netmisc.c
index d35d52889cb..c6721ee26db 100644
--- a/fs/cifs/netmisc.c
+++ b/fs/cifs/netmisc.c
@@ -61,6 +61,7 @@ static const struct smb_to_posix_error mapping_table_ERRDOS[] = {
{ERRremcd, -EACCES},
{ERRdiffdevice, -EXDEV},
{ERRnofiles, -ENOENT},
+ {ERRwriteprot, -EROFS},
{ERRbadshare, -ETXTBSY},
{ERRlock, -EACCES},
{ERRunsup, -EINVAL},
@@ -164,7 +165,7 @@ cifs_inet_pton(const int address_family, const char *cp, void *dst)
* Returns 0 on failure.
*/
int
-cifs_convert_address(char *src, void *dst)
+cifs_convert_address(struct sockaddr *dst, char *src)
{
int rc;
char *pct, *endp;
@@ -201,6 +202,27 @@ cifs_convert_address(char *src, void *dst)
return rc;
}
+int
+cifs_fill_sockaddr(struct sockaddr *dst, char *src,
+ const unsigned short int port)
+{
+ if (!cifs_convert_address(dst, src))
+ return 0;
+
+ switch (dst->sa_family) {
+ case AF_INET:
+ ((struct sockaddr_in *)dst)->sin_port = htons(port);
+ break;
+ case AF_INET6:
+ ((struct sockaddr_in6 *)dst)->sin6_port = htons(port);
+ break;
+ default:
+ return 0;
+ }
+
+ return 1;
+}
+
/*****************************************************************************
convert a NT status code to a dos class/code
*****************************************************************************/
diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c
index daf1753af67..d5e591fab47 100644
--- a/fs/cifs/readdir.c
+++ b/fs/cifs/readdir.c
@@ -847,6 +847,11 @@ int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len;
tmp_buf = kmalloc(UNICODE_NAME_MAX, GFP_KERNEL);
+ if (tmp_buf == NULL) {
+ rc = -ENOMEM;
+ break;
+ }
+
for (i = 0; (i < num_to_fill) && (rc == 0); i++) {
if (current_entry == NULL) {
/* evaluate whether this case is an error */
diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index 7707389bdf2..0a57cb7db5d 100644
--- a/fs/cifs/sess.c
+++ b/fs/cifs/sess.c
@@ -730,15 +730,7 @@ ssetup_ntlmssp_authenticate:
/* calculate session key */
setup_ntlmv2_rsp(ses, v2_sess_key, nls_cp);
- if (first_time) /* should this be moved into common code
- with similar ntlmv2 path? */
- /* cifs_calculate_ntlmv2_mac_key(ses->server->mac_signing_key,
- response BB FIXME, v2_sess_key); */
-
- /* copy session key */
-
- /* memcpy(bcc_ptr, (char *)ntlm_session_key,LM2_SESS_KEY_SIZE);
- bcc_ptr += LM2_SESS_KEY_SIZE; */
+ /* FIXME: calculate MAC key */
memcpy(bcc_ptr, (char *)v2_sess_key,
sizeof(struct ntlmv2_resp));
bcc_ptr += sizeof(struct ntlmv2_resp);
diff --git a/fs/cifs/smberr.h b/fs/cifs/smberr.h
index c5084d27db7..7f16cb825fe 100644
--- a/fs/cifs/smberr.h
+++ b/fs/cifs/smberr.h
@@ -76,6 +76,7 @@
#define ERRnofiles 18 /* A File Search command can find no
more files matching the specified
criteria. */
+#define ERRwriteprot 19 /* media is write protected */
#define ERRgeneral 31
#define ERRbadshare 32 /* The sharing mode specified for an
Open conflicts with existing FIDs on
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-17 01:51:31 +0000