summaryrefslogtreecommitdiffstats
path: root/fs/nfs
diff options
context:
space:
mode:
Diffstat (limited to 'fs/nfs')
-rw-r--r--fs/nfs/dir.c19
-rw-r--r--fs/nfs/getroot.c42
-rw-r--r--fs/nfs/inode.c10
-rw-r--r--fs/nfs/internal.h34
-rw-r--r--fs/nfs/namespace.c179
-rw-r--r--fs/nfs/nfs3proc.c2
-rw-r--r--fs/nfs/nfs4_fs.h3
-rw-r--r--fs/nfs/nfs4namespace.c41
-rw-r--r--fs/nfs/nfs4proc.c177
-rw-r--r--fs/nfs/nfs4xdr.c146
-rw-r--r--fs/nfs/proc.c2
-rw-r--r--fs/nfs/super.c194
-rw-r--r--fs/nfs/unlink.c20
13 files changed, 647 insertions, 222 deletions
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index db87a7d1109..7237672216c 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1135,7 +1135,7 @@ static int nfs_lookup_revalidate(struct dentry *dentry, struct nameidata *nd)
if (fhandle == NULL || fattr == NULL)
goto out_error;
- error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr);
+ error = NFS_PROTO(dir)->lookup(NFS_SERVER(dir)->client, dir, &dentry->d_name, fhandle, fattr);
if (error)
goto out_bad;
if (nfs_compare_fh(NFS_FH(inode), fhandle))
@@ -1236,11 +1236,23 @@ static void nfs_dentry_iput(struct dentry *dentry, struct inode *inode)
iput(inode);
}
+static void nfs_d_release(struct dentry *dentry)
+{
+ /* free cached devname value, if it survived that far */
+ if (unlikely(dentry->d_fsdata)) {
+ if (dentry->d_flags & DCACHE_NFSFS_RENAMED)
+ WARN_ON(1);
+ else
+ kfree(dentry->d_fsdata);
+ }
+}
+
const struct dentry_operations nfs_dentry_operations = {
.d_revalidate = nfs_lookup_revalidate,
.d_delete = nfs_dentry_delete,
.d_iput = nfs_dentry_iput,
.d_automount = nfs_d_automount,
+ .d_release = nfs_d_release,
};
static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *nd)
@@ -1279,7 +1291,7 @@ static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, stru
parent = dentry->d_parent;
/* Protect against concurrent sillydeletes */
nfs_block_sillyrename(parent);
- error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr);
+ error = NFS_PROTO(dir)->lookup(NFS_SERVER(dir)->client, dir, &dentry->d_name, fhandle, fattr);
if (error == -ENOENT)
goto no_entry;
if (error < 0) {
@@ -1315,6 +1327,7 @@ const struct dentry_operations nfs4_dentry_operations = {
.d_delete = nfs_dentry_delete,
.d_iput = nfs_dentry_iput,
.d_automount = nfs_d_automount,
+ .d_release = nfs_d_release,
};
/*
@@ -1616,7 +1629,7 @@ int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fhandle,
if (dentry->d_inode)
goto out;
if (fhandle->size == 0) {
- error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr);
+ error = NFS_PROTO(dir)->lookup(NFS_SERVER(dir)->client, dir, &dentry->d_name, fhandle, fattr);
if (error)
goto out_error;
}
diff --git a/fs/nfs/getroot.c b/fs/nfs/getroot.c
index 79796521cfd..dcb61548887 100644
--- a/fs/nfs/getroot.c
+++ b/fs/nfs/getroot.c
@@ -75,18 +75,25 @@ static int nfs_superblock_set_dummy_root(struct super_block *sb, struct inode *i
/*
* get an NFS2/NFS3 root dentry from the root filehandle
*/
-struct dentry *nfs_get_root(struct super_block *sb, struct nfs_fh *mntfh)
+struct dentry *nfs_get_root(struct super_block *sb, struct nfs_fh *mntfh,
+ const char *devname)
{
struct nfs_server *server = NFS_SB(sb);
struct nfs_fsinfo fsinfo;
struct dentry *ret;
struct inode *inode;
+ void *name = kstrdup(devname, GFP_KERNEL);
int error;
+ if (!name)
+ return ERR_PTR(-ENOMEM);
+
/* get the actual root for this mount */
fsinfo.fattr = nfs_alloc_fattr();
- if (fsinfo.fattr == NULL)
+ if (fsinfo.fattr == NULL) {
+ kfree(name);
return ERR_PTR(-ENOMEM);
+ }
error = server->nfs_client->rpc_ops->getroot(server, mntfh, &fsinfo);
if (error < 0) {
@@ -119,7 +126,15 @@ struct dentry *nfs_get_root(struct super_block *sb, struct nfs_fh *mntfh)
}
security_d_instantiate(ret, inode);
+ spin_lock(&ret->d_lock);
+ if (IS_ROOT(ret) && !(ret->d_flags & DCACHE_NFSFS_RENAMED)) {
+ ret->d_fsdata = name;
+ name = NULL;
+ }
+ spin_unlock(&ret->d_lock);
out:
+ if (name)
+ kfree(name);
nfs_free_fattr(fsinfo.fattr);
return ret;
}
@@ -169,27 +184,35 @@ out:
/*
* get an NFS4 root dentry from the root filehandle
*/
-struct dentry *nfs4_get_root(struct super_block *sb, struct nfs_fh *mntfh)
+struct dentry *nfs4_get_root(struct super_block *sb, struct nfs_fh *mntfh,
+ const char *devname)
{
struct nfs_server *server = NFS_SB(sb);
struct nfs_fattr *fattr = NULL;
struct dentry *ret;
struct inode *inode;
+ void *name = kstrdup(devname, GFP_KERNEL);
int error;
dprintk("--> nfs4_get_root()\n");
+ if (!name)
+ return ERR_PTR(-ENOMEM);
+
/* get the info about the server and filesystem */
error = nfs4_server_capabilities(server, mntfh);
if (error < 0) {
dprintk("nfs_get_root: getcaps error = %d\n",
-error);
+ kfree(name);
return ERR_PTR(error);
}
fattr = nfs_alloc_fattr();
- if (fattr == NULL)
- return ERR_PTR(-ENOMEM);;
+ if (fattr == NULL) {
+ kfree(name);
+ return ERR_PTR(-ENOMEM);
+ }
/* get the actual root for this mount */
error = server->nfs_client->rpc_ops->getattr(server, mntfh, fattr);
@@ -227,8 +250,15 @@ struct dentry *nfs4_get_root(struct super_block *sb, struct nfs_fh *mntfh)
}
security_d_instantiate(ret, inode);
-
+ spin_lock(&ret->d_lock);
+ if (IS_ROOT(ret) && !(ret->d_flags & DCACHE_NFSFS_RENAMED)) {
+ ret->d_fsdata = name;
+ name = NULL;
+ }
+ spin_unlock(&ret->d_lock);
out:
+ if (name)
+ kfree(name);
nfs_free_fattr(fattr);
dprintk("<-- nfs4_get_root()\n");
return ret;
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 229e586b1a2..57bb31ad7a5 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -254,7 +254,9 @@ nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
struct inode *inode = ERR_PTR(-ENOENT);
unsigned long hash;
- if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0)
+ nfs_attr_check_mountpoint(sb, fattr);
+
+ if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0 && (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0)
goto out_no_inode;
if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0)
goto out_no_inode;
@@ -298,8 +300,8 @@ nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS))
set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags);
/* Deal with crossing mountpoints */
- if ((fattr->valid & NFS_ATTR_FATTR_FSID)
- && !nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) {
+ if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT ||
+ fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) {
if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
inode->i_op = &nfs_referral_inode_operations;
else
@@ -1518,7 +1520,7 @@ static int nfsiod_start(void)
{
struct workqueue_struct *wq;
dprintk("RPC: creating workqueue nfsiod\n");
- wq = alloc_workqueue("nfsiod", WQ_RESCUER, 0);
+ wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0);
if (wq == NULL)
return -ENOMEM;
nfsiod_workqueue = wq;
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index 70870506221..ce118ce885d 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -39,6 +39,12 @@ static inline int nfs4_has_persistent_session(const struct nfs_client *clp)
return 0;
}
+static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr)
+{
+ if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid))
+ fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT;
+}
+
struct nfs_clone_mount {
const struct super_block *sb;
const struct dentry *dentry;
@@ -166,10 +172,10 @@ static inline void nfs_fs_proc_exit(void)
/* nfs4namespace.c */
#ifdef CONFIG_NFS_V4
-extern struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry);
+extern struct vfsmount *nfs_do_refmount(struct dentry *dentry);
#else
static inline
-struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry)
+struct vfsmount *nfs_do_refmount(struct dentry *dentry)
{
return ERR_PTR(-ENOENT);
}
@@ -214,6 +220,7 @@ extern const u32 nfs41_maxwrite_overhead;
/* nfs4proc.c */
#ifdef CONFIG_NFS_V4
extern struct rpc_procinfo nfs4_procedures[];
+void nfs_fixup_secinfo_attributes(struct nfs_fattr *, struct nfs_fh *);
#endif
extern int nfs4_init_ds_session(struct nfs_client *clp);
@@ -256,16 +263,16 @@ extern void nfs_sb_active(struct super_block *sb);
extern void nfs_sb_deactive(struct super_block *sb);
/* namespace.c */
-extern char *nfs_path(const char *base,
- const struct dentry *droot,
- const struct dentry *dentry,
+extern char *nfs_path(char **p, struct dentry *dentry,
char *buffer, ssize_t buflen);
extern struct vfsmount *nfs_d_automount(struct path *path);
/* getroot.c */
-extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *);
+extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *,
+ const char *);
#ifdef CONFIG_NFS_V4
-extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *);
+extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *,
+ const char *);
extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh);
#endif
@@ -310,12 +317,14 @@ extern int nfs4_init_client(struct nfs_client *clp,
rpc_authflavor_t authflavour,
int noresvport);
extern void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data);
-extern int _nfs4_call_sync(struct nfs_server *server,
+extern int _nfs4_call_sync(struct rpc_clnt *clnt,
+ struct nfs_server *server,
struct rpc_message *msg,
struct nfs4_sequence_args *args,
struct nfs4_sequence_res *res,
int cache_reply);
-extern int _nfs4_call_sync_session(struct nfs_server *server,
+extern int _nfs4_call_sync_session(struct rpc_clnt *clnt,
+ struct nfs_server *server,
struct rpc_message *msg,
struct nfs4_sequence_args *args,
struct nfs4_sequence_res *res,
@@ -324,12 +333,11 @@ extern int _nfs4_call_sync_session(struct nfs_server *server,
/*
* Determine the device name as a string
*/
-static inline char *nfs_devname(const struct vfsmount *mnt_parent,
- const struct dentry *dentry,
+static inline char *nfs_devname(struct dentry *dentry,
char *buffer, ssize_t buflen)
{
- return nfs_path(mnt_parent->mnt_devname, mnt_parent->mnt_root,
- dentry, buffer, buflen);
+ char *dummy;
+ return nfs_path(&dummy, dentry, buffer, buflen);
}
/*
diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c
index f32b8603dca..ad92bf731ff 100644
--- a/fs/nfs/namespace.c
+++ b/fs/nfs/namespace.c
@@ -15,6 +15,7 @@
#include <linux/string.h>
#include <linux/sunrpc/clnt.h>
#include <linux/vfs.h>
+#include <linux/sunrpc/gss_api.h>
#include "internal.h"
#define NFSDBG_FACILITY NFSDBG_VFS
@@ -25,33 +26,31 @@ static LIST_HEAD(nfs_automount_list);
static DECLARE_DELAYED_WORK(nfs_automount_task, nfs_expire_automounts);
int nfs_mountpoint_expiry_timeout = 500 * HZ;
-static struct vfsmount *nfs_do_submount(const struct vfsmount *mnt_parent,
- const struct dentry *dentry,
+static struct vfsmount *nfs_do_submount(struct dentry *dentry,
struct nfs_fh *fh,
- struct nfs_fattr *fattr);
+ struct nfs_fattr *fattr,
+ rpc_authflavor_t authflavor);
/*
* nfs_path - reconstruct the path given an arbitrary dentry
- * @base - arbitrary string to prepend to the path
- * @droot - pointer to root dentry for mountpoint
+ * @base - used to return pointer to the end of devname part of path
* @dentry - pointer to dentry
* @buffer - result buffer
* @buflen - length of buffer
*
- * Helper function for constructing the path from the
- * root dentry to an arbitrary hashed dentry.
+ * Helper function for constructing the server pathname
+ * by arbitrary hashed dentry.
*
* This is mainly for use in figuring out the path on the
- * server side when automounting on top of an existing partition.
+ * server side when automounting on top of an existing partition
+ * and in generating /proc/mounts and friends.
*/
-char *nfs_path(const char *base,
- const struct dentry *droot,
- const struct dentry *dentry,
- char *buffer, ssize_t buflen)
+char *nfs_path(char **p, struct dentry *dentry, char *buffer, ssize_t buflen)
{
char *end;
int namelen;
unsigned seq;
+ const char *base;
rename_retry:
end = buffer+buflen;
@@ -60,7 +59,10 @@ rename_retry:
seq = read_seqbegin(&rename_lock);
rcu_read_lock();
- while (!IS_ROOT(dentry) && dentry != droot) {
+ while (1) {
+ spin_lock(&dentry->d_lock);
+ if (IS_ROOT(dentry))
+ break;
namelen = dentry->d_name.len;
buflen -= namelen + 1;
if (buflen < 0)
@@ -68,27 +70,47 @@ rename_retry:
end -= namelen;
memcpy(end, dentry->d_name.name, namelen);
*--end = '/';
+ spin_unlock(&dentry->d_lock);
dentry = dentry->d_parent;
}
- rcu_read_unlock();
- if (read_seqretry(&rename_lock, seq))
+ if (read_seqretry(&rename_lock, seq)) {
+ spin_unlock(&dentry->d_lock);
+ rcu_read_unlock();
goto rename_retry;
+ }
if (*end != '/') {
- if (--buflen < 0)
+ if (--buflen < 0) {
+ spin_unlock(&dentry->d_lock);
+ rcu_read_unlock();
goto Elong;
+ }
*--end = '/';
}
+ *p = end;
+ base = dentry->d_fsdata;
+ if (!base) {
+ spin_unlock(&dentry->d_lock);
+ rcu_read_unlock();
+ WARN_ON(1);
+ return end;
+ }
namelen = strlen(base);
/* Strip off excess slashes in base string */
while (namelen > 0 && base[namelen - 1] == '/')
namelen--;
buflen -= namelen;
- if (buflen < 0)
+ if (buflen < 0) {
+ spin_unlock(&dentry->d_lock);
+ rcu_read_unlock();
goto Elong;
+ }
end -= namelen;
memcpy(end, base, namelen);
+ spin_unlock(&dentry->d_lock);
+ rcu_read_unlock();
return end;
Elong_unlock:
+ spin_unlock(&dentry->d_lock);
rcu_read_unlock();
if (read_seqretry(&rename_lock, seq))
goto rename_retry;
@@ -96,6 +118,100 @@ Elong:
return ERR_PTR(-ENAMETOOLONG);
}
+#ifdef CONFIG_NFS_V4
+static rpc_authflavor_t nfs_find_best_sec(struct nfs4_secinfo_flavors *flavors, struct inode *inode)
+{
+ struct gss_api_mech *mech;
+ struct xdr_netobj oid;
+ int i;
+ rpc_authflavor_t pseudoflavor = RPC_AUTH_UNIX;
+
+ for (i = 0; i < flavors->num_flavors; i++) {
+ struct nfs4_secinfo_flavor *flavor;
+ flavor = &flavors->flavors[i];
+
+ if (flavor->flavor == RPC_AUTH_NULL || flavor->flavor == RPC_AUTH_UNIX) {
+ pseudoflavor = flavor->flavor;
+ break;
+ } else if (flavor->flavor == RPC_AUTH_GSS) {
+ oid.len = flavor->gss.sec_oid4.len;
+ oid.data = flavor->gss.sec_oid4.data;
+ mech = gss_mech_get_by_OID(&oid);
+ if (!mech)
+ continue;
+ pseudoflavor = gss_svc_to_pseudoflavor(mech, flavor->gss.service);
+ gss_mech_put(mech);
+ break;
+ }
+ }
+
+ return pseudoflavor;
+}
+
+static rpc_authflavor_t nfs_negotiate_security(const struct dentry *parent, const struct dentry *dentry)
+{
+ int status = 0;
+ struct page *page;
+ struct nfs4_secinfo_flavors *flavors;
+ int (*secinfo)(struct inode *, const struct qstr *, struct nfs4_secinfo_flavors *);
+ rpc_authflavor_t flavor = RPC_AUTH_UNIX;
+
+ secinfo = NFS_PROTO(parent->d_inode)->secinfo;
+ if (secinfo != NULL) {
+ page = alloc_page(GFP_KERNEL);
+ if (!page) {
+ status = -ENOMEM;
+ goto out;
+ }
+ flavors = page_address(page);
+ status = secinfo(parent->d_inode, &dentry->d_name, flavors);
+ flavor = nfs_find_best_sec(flavors, dentry->d_inode);
+ put_page(page);
+ }
+
+ return flavor;
+
+out:
+ status = -ENOMEM;
+ return status;
+}
+
+static rpc_authflavor_t nfs_lookup_with_sec(struct nfs_server *server, struct dentry *parent,
+ struct dentry *dentry, struct path *path,
+ struct nfs_fh *fh, struct nfs_fattr *fattr)
+{
+ rpc_authflavor_t flavor;
+ struct rpc_clnt *clone;
+ struct rpc_auth *auth;
+ int err;
+
+ flavor = nfs_negotiate_security(parent, path->dentry);
+ if (flavor < 0)
+ goto out;
+ clone = rpc_clone_client(server->client);
+ auth = rpcauth_create(flavor, clone);
+ if (!auth) {
+ flavor = -EIO;
+ goto out;
+ }
+ err = server->nfs_client->rpc_ops->lookup(clone, parent->d_inode,
+ &path->dentry->d_name,
+ fh, fattr);
+ if (err < 0)
+ flavor = err;
+out:
+ return flavor;
+}
+#else /* CONFIG_NFS_V4 */
+static inline rpc_authflavor_t nfs_lookup_with_sec(struct nfs_server *server,
+ struct dentry *parent, struct dentry *dentry,
+ struct path *path, struct nfs_fh *fh,
+ struct nfs_fattr *fattr)
+{
+ return -EPERM;
+}
+#endif /* CONFIG_NFS_V4 */
+
/*
* nfs_d_automount - Handle crossing a mountpoint on the server
* @path - The mountpoint
@@ -116,6 +232,7 @@ struct vfsmount *nfs_d_automount(struct path *path)
struct nfs_fh *fh = NULL;
struct nfs_fattr *fattr = NULL;
int err;
+ rpc_authflavor_t flavor = 1;
dprintk("--> nfs_d_automount()\n");
@@ -133,9 +250,16 @@ struct vfsmount *nfs_d_automount(struct path *path)
/* Look it up again to get its attributes */
parent = dget_parent(path->dentry);
- err = server->nfs_client->rpc_ops->lookup(parent->d_inode,
+ err = server->nfs_client->rpc_ops->lookup(server->client, parent->d_inode,
&path->dentry->d_name,
fh, fattr);
+ if (err == -EPERM) {
+ flavor = nfs_lookup_with_sec(server, parent, path->dentry, path, fh, fattr);
+ if (flavor < 0)
+ err = flavor;
+ else
+ err = 0;
+ }
dput(parent);
if (err != 0) {
mnt = ERR_PTR(err);
@@ -143,9 +267,9 @@ struct vfsmount *nfs_d_automount(struct path *path)
}
if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
- mnt = nfs_do_refmount(path->mnt, path->dentry);
+ mnt = nfs_do_refmount(path->dentry);
else
- mnt = nfs_do_submount(path->mnt, path->dentry, fh, fattr);
+ mnt = nfs_do_submount(path->dentry, fh, fattr, flavor);
if (IS_ERR(mnt))
goto out;
@@ -209,22 +333,23 @@ static struct vfsmount *nfs_do_clone_mount(struct nfs_server *server,
/**
* nfs_do_submount - set up mountpoint when crossing a filesystem boundary
- * @mnt_parent - mountpoint of parent directory
* @dentry - parent directory
* @fh - filehandle for new root dentry
* @fattr - attributes for new root inode
+ * @authflavor - security flavor to use when performing the mount
*
*/
-static struct vfsmount *nfs_do_submount(const struct vfsmount *mnt_parent,
- const struct dentry *dentry,
+static struct vfsmount *nfs_do_submount(struct dentry *dentry,
struct nfs_fh *fh,
- struct nfs_fattr *fattr)
+ struct nfs_fattr *fattr,
+ rpc_authflavor_t authflavor)
{
struct nfs_clone_mount mountdata = {
- .sb = mnt_parent->mnt_sb,
+ .sb = dentry->d_sb,
.dentry = dentry,
.fh = fh,
.fattr = fattr,
+ .authflavor = authflavor,
};
struct vfsmount *mnt = ERR_PTR(-ENOMEM);
char *page = (char *) __get_free_page(GFP_USER);
@@ -237,11 +362,11 @@ static struct vfsmount *nfs_do_submount(const struct vfsmount *mnt_parent,
dentry->d_name.name);
if (page == NULL)
goto out;
- devname = nfs_devname(mnt_parent, dentry, page, PAGE_SIZE);
+ devname = nfs_devname(dentry, page, PAGE_SIZE);
mnt = (struct vfsmount *)devname;
if (IS_ERR(devname))
goto free_page;
- mnt = nfs_do_clone_mount(NFS_SB(mnt_parent->mnt_sb), devname, &mountdata);
+ mnt = nfs_do_clone_mount(NFS_SB(dentry->d_sb), devname, &mountdata);
free_page:
free_page((unsigned long)page);
out:
diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
index d0c80d8b3f9..38053d823eb 100644
--- a/fs/nfs/nfs3proc.c
+++ b/fs/nfs/nfs3proc.c
@@ -141,7 +141,7 @@ nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
}
static int
-nfs3_proc_lookup(struct inode *dir, struct qstr *name,
+nfs3_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
struct nfs_fh *fhandle, struct nfs_fattr *fattr)
{
struct nfs3_diropargs arg = {
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index 4414fd7e7d5..e1c261ddd65 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -57,7 +57,8 @@ enum nfs4_session_state {
struct nfs4_minor_version_ops {
u32 minor_version;
- int (*call_sync)(struct nfs_server *server,
+ int (*call_sync)(struct rpc_clnt *clnt,
+ struct nfs_server *server,
struct rpc_message *msg,
struct nfs4_sequence_args *args,
struct nfs4_sequence_res *res,
diff --git a/fs/nfs/nfs4namespace.c b/fs/nfs/nfs4namespace.c
index 3c2a1724fbd..bb80c49b653 100644
--- a/fs/nfs/nfs4namespace.c
+++ b/fs/nfs/nfs4namespace.c
@@ -54,33 +54,29 @@ Elong:
/*
* Determine the mount path as a string
*/
-static char *nfs4_path(const struct vfsmount *mnt_parent,
- const struct dentry *dentry,
- char *buffer, ssize_t buflen)
+static char *nfs4_path(struct dentry *dentry, char *buffer, ssize_t buflen)
{
- const char *srvpath;
-
- srvpath = strchr(mnt_parent->mnt_devname, ':');
- if (srvpath)
- srvpath++;
- else
- srvpath = mnt_parent->mnt_devname;
-
- return nfs_path(srvpath, mnt_parent->mnt_root, dentry, buffer, buflen);
+ char *limit;
+ char *path = nfs_path(&limit, dentry, buffer, buflen);
+ if (!IS_ERR(path)) {
+ char *colon = strchr(path, ':');
+ if (colon && colon < limit)
+ path = colon + 1;
+ }
+ return path;
}
/*
* Check that fs_locations::fs_root [RFC3530 6.3] is a prefix for what we
* believe to be the server path to this dentry
*/
-static int nfs4_validate_fspath(const struct vfsmount *mnt_parent,
- const struct dentry *dentry,
+static int nfs4_validate_fspath(struct dentry *dentry,
const struct nfs4_fs_locations *locations,
char *page, char *page2)
{
const char *path, *fs_path;
- path = nfs4_path(mnt_parent, dentry, page, PAGE_SIZE);
+ path = nfs4_path(dentry, page, PAGE_SIZE);
if (IS_ERR(path))
return PTR_ERR(path);
@@ -165,20 +161,18 @@ static struct vfsmount *try_location(struct nfs_clone_mount *mountdata,
/**
* nfs_follow_referral - set up mountpoint when hitting a referral on moved error
- * @mnt_parent - mountpoint of parent directory
* @dentry - parent directory
* @locations - array of NFSv4 server location information
*
*/
-static struct vfsmount *nfs_follow_referral(const struct vfsmount *mnt_parent,
- const struct dentry *dentry,
+static struct vfsmount *nfs_follow_referral(struct dentry *dentry,
const struct nfs4_fs_locations *locations)
{
struct vfsmount *mnt = ERR_PTR(-ENOENT);
struct nfs_clone_mount mountdata = {
- .sb = mnt_parent->mnt_sb,
+ .sb = dentry->d_sb,
.dentry = dentry,
- .authflavor = NFS_SB(mnt_parent->mnt_sb)->client->cl_auth->au_flavor,
+ .authflavor = NFS_SB(dentry->d_sb)->client->cl_auth->au_flavor,
};
char *page = NULL, *page2 = NULL;
int loc, error;
@@ -198,7 +192,7 @@ static struct vfsmount *nfs_follow_referral(const struct vfsmount *mnt_parent,
goto out;
/* Ensure fs path is a prefix of current dentry path */
- error = nfs4_validate_fspath(mnt_parent, dentry, locations, page, page2);
+ error = nfs4_validate_fspath(dentry, locations, page, page2);
if (error < 0) {
mnt = ERR_PTR(error);
goto out;
@@ -225,11 +219,10 @@ out:
/*
* nfs_do_refmount - handle crossing a referral on server
- * @mnt_parent - mountpoint of referral
* @dentry - dentry of referral
*
*/
-struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry)
+struct vfsmount *nfs_do_refmount(struct dentry *dentry)
{
struct vfsmount *mnt = ERR_PTR(-ENOMEM);
struct dentry *parent;
@@ -262,7 +255,7 @@ struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentr
fs_locations->fs_path.ncomponents <= 0)
goto out_free;
- mnt = nfs_follow_referral(mnt_parent, dentry, fs_locations);
+ mnt = nfs_follow_referral(dentry, fs_locations);
out_free:
__free_page(page);
kfree(fs_locations);
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 8f071314e94..dfd1e6d7e6c 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -41,6 +41,7 @@
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/sunrpc/clnt.h>
+#include <linux/sunrpc/gss_api.h>
#include <linux/nfs.h>
#include <linux/nfs4.h>
#include <linux/nfs_fs.h>
@@ -71,7 +72,9 @@ static int _nfs4_proc_open(struct nfs4_opendata *data);
static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
-static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
+static int _nfs4_proc_lookup(struct rpc_clnt *client, struct inode *dir,
+ const struct qstr *name, struct nfs_fh *fhandle,
+ struct nfs_fattr *fattr);
static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
struct nfs_fattr *fattr, struct iattr *sattr,
@@ -85,6 +88,8 @@ static int nfs4_map_errors(int err)
switch (err) {
case -NFS4ERR_RESOURCE:
return -EREMOTEIO;
+ case -NFS4ERR_WRONGSEC:
+ return -EPERM;
case -NFS4ERR_BADOWNER:
case -NFS4ERR_BADNAME:
return -EINVAL;
@@ -657,7 +662,8 @@ struct rpc_call_ops nfs41_call_priv_sync_ops = {
.rpc_call_done = nfs41_call_sync_done,
};
-static int nfs4_call_sync_sequence(struct nfs_server *server,
+static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
+ struct nfs_server *server,
struct rpc_message *msg,
struct nfs4_sequence_args *args,
struct nfs4_sequence_res *res,
@@ -673,7 +679,7 @@ static int nfs4_call_sync_sequence(struct nfs_server *server,
.cache_reply = cache_reply,
};
struct rpc_task_setup task_setup = {
- .rpc_client = server->client,
+ .rpc_client = clnt,
.rpc_message = msg,
.callback_ops = &nfs41_call_sync_ops,
.callback_data = &data
@@ -692,13 +698,14 @@ static int nfs4_call_sync_sequence(struct nfs_server *server,
return ret;
}
-int _nfs4_call_sync_session(struct nfs_server *server,
+int _nfs4_call_sync_session(struct rpc_clnt *clnt,
+ struct nfs_server *server,
struct rpc_message *msg,
struct nfs4_sequence_args *args,
struct nfs4_sequence_res *res,
int cache_reply)
{
- return nfs4_call_sync_sequence(server, msg, args, res, cache_reply, 0);
+ return nfs4_call_sync_sequence(clnt, server, msg, args, res, cache_reply, 0);
}
#else
@@ -709,19 +716,28 @@ static int nfs4_sequence_done(struct rpc_task *task,
}
#endif /* CONFIG_NFS_V4_1 */
-int _nfs4_call_sync(struct nfs_server *server,
+int _nfs4_call_sync(struct rpc_clnt *clnt,
+ struct nfs_server *server,
struct rpc_message *msg,
struct nfs4_sequence_args *args,
struct nfs4_sequence_res *res,
int cache_reply)
{
args->sa_session = res->sr_session = NULL;
- return rpc_call_sync(server->client, msg, 0);
+ return rpc_call_sync(clnt, msg, 0);
}
-#define nfs4_call_sync(server, msg, args, res, cache_reply) \
- (server)->nfs_client->cl_mvops->call_sync((server), (msg), &(args)->seq_args, \
- &(res)->seq_res, (cache_reply))
+static inline
+int nfs4_call_sync(struct rpc_clnt *clnt,
+ struct nfs_server *server,
+ struct rpc_message *msg,
+ struct nfs4_sequence_args *args,
+ struct nfs4_sequence_res *res,
+ int cache_reply)
+{
+ return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
+ args, res, cache_reply);
+}
static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
{
@@ -1831,7 +1847,7 @@ static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
} else
memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
- status = nfs4_call_sync(server, &msg, &arg, &res, 1);
+ status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
if (status == 0 && state != NULL)
renew_lease(server, timestamp);
return status;
@@ -2090,7 +2106,7 @@ static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *f
};
int status;
- status = nfs4_call_sync(server, &msg, &args, &res, 0);
+ status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
if (status == 0) {
memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
@@ -2160,7 +2176,7 @@ static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
};
nfs_fattr_init(info->fattr);
- return nfs4_call_sync(server, &msg, &args, &res, 0);
+ return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
}
static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
@@ -2176,15 +2192,43 @@ static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
return err;
}
+static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
+ struct nfs_fsinfo *info, rpc_authflavor_t flavor)
+{
+ struct rpc_auth *auth;
+ int ret;
+
+ auth = rpcauth_create(flavor, server->client);
+ if (!auth) {
+ ret = -EIO;
+ goto out;
+ }
+ ret = nfs4_lookup_root(server, fhandle, info);
+ if (ret < 0)
+ ret = -EAGAIN;
+out:
+ return ret;
+}
+
/*
* get the file handle for the "/" directory on the server
*/
static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
struct nfs_fsinfo *info)
{
- int status;
+ int i, len, status = 0;
+ rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS + 2];
- status = nfs4_lookup_root(server, fhandle, info);
+ flav_array[0] = RPC_AUTH_UNIX;
+ len = gss_mech_list_pseudoflavors(&flav_array[1]);
+ flav_array[1+len] = RPC_AUTH_NULL;
+ len += 2;
+
+ for (i = 0; i < len; i++) {
+ status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
+ if (status == 0)
+ break;
+ }
if (status == 0)
status = nfs4_server_capabilities(server, fhandle);
if (status == 0)
@@ -2249,7 +2293,7 @@ static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
};
nfs_fattr_init(fattr);
- return nfs4_call_sync(server, &msg, &args, &res, 0);
+ return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
}
static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
@@ -2309,9 +2353,9 @@ nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
return status;
}
-static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
- const struct qstr *name, struct nfs_fh *fhandle,
- struct nfs_fattr *fattr)
+static int _nfs4_proc_lookupfh(struct rpc_clnt *clnt, struct nfs_server *server,
+ const struct nfs_fh *dirfh, const struct qstr *name,
+ struct nfs_fh *fhandle, struct nfs_fattr *fattr)
{
int status;
struct nfs4_lookup_arg args = {
@@ -2333,7 +2377,7 @@ static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *d
nfs_fattr_init(fattr);
dprintk("NFS call lookupfh %s\n", name->name);
- status = nfs4_call_sync(server, &msg, &args, &res, 0);
+ status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
dprintk("NFS reply lookupfh: %d\n", status);
return status;
}
@@ -2345,7 +2389,7 @@ static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
struct nfs4_exception exception = { };
int err;
do {
- err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
+ err = _nfs4_proc_lookupfh(server->client, server, dirfh, name, fhandle, fattr);
/* FIXME: !!!! */
if (err == -NFS4ERR_MOVED) {
err = -EREMOTE;
@@ -2356,27 +2400,41 @@ static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
return err;
}
-static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
- struct nfs_fh *fhandle, struct nfs_fattr *fattr)
+static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
+ const struct qstr *name, struct nfs_fh *fhandle,
+ struct nfs_fattr *fattr)
{
int status;
dprintk("NFS call lookup %s\n", name->name);
- status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
+ status = _nfs4_proc_lookupfh(clnt, NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
if (status == -NFS4ERR_MOVED)
status = nfs4_get_referral(dir, name, fattr, fhandle);
dprintk("NFS reply lookup: %d\n", status);
return status;
}
-static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
+void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr, struct nfs_fh *fh)
+{
+ memset(fh, 0, sizeof(struct nfs_fh));
+ fattr->fsid.major = 1;
+ fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
+ NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_FSID | NFS_ATTR_FATTR_MOUNTPOINT;
+ fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
+ fattr->nlink = 2;
+}
+
+static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
+ struct nfs_fh *fhandle, struct nfs_fattr *fattr)
{
struct nfs4_exception exception = { };
int err;
do {
err = nfs4_handle_exception(NFS_SERVER(dir),
- _nfs4_proc_lookup(dir, name, fhandle, fattr),
+ _nfs4_proc_lookup(clnt, dir, name, fhandle, fattr),
&exception);
+ if (err == -EPERM)
+ nfs_fixup_secinfo_attributes(fattr, fhandle);
} while (exception.retry);
return err;
}
@@ -2421,7 +2479,7 @@ static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry
if (res.fattr == NULL)
return -ENOMEM;
- status = nfs4_call_sync(server, &msg, &args, &res, 0);
+ status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
if (!status) {
entry->mask = 0;
if (res.access & NFS4_ACCESS_READ)
@@ -2488,7 +2546,7 @@ static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
.rpc_resp = &res,
};
- return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
+ return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
}
static int nfs4_proc_readlink(struct inode *inode, struct page *page,
@@ -2577,7 +2635,7 @@ static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
if (res.dir_attr == NULL)
goto out;
- status = nfs4_call_sync(server, &msg, &args, &res, 1);
+ status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
if (status == 0) {
update_changeattr(dir, &res.cinfo);
nfs_post_op_update_inode(dir, res.dir_attr);
@@ -2678,7 +2736,7 @@ static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
if (res.old_fattr == NULL || res.new_fattr == NULL)
goto out;
- status = nfs4_call_sync(server, &msg, &arg, &res, 1);
+ status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
if (!status) {
update_changeattr(old_dir, &res.old_cinfo);
nfs_post_op_update_inode(old_dir, res.old_fattr);
@@ -2729,7 +2787,7 @@ static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *
if (res.fattr == NULL || res.dir_attr == NULL)
goto out;
- status = nfs4_call_sync(server, &msg, &arg, &res, 1);
+ status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
if (!status) {
update_changeattr(dir, &res.cinfo);
nfs_post_op_update_inode(dir, res.dir_attr);
@@ -2792,8 +2850,8 @@ static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
{
- int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
- &data->arg, &data->res, 1);
+ int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
+ &data->arg.seq_args, &data->res.seq_res, 1);
if (status == 0) {
update_changeattr(dir, &data->res.dir_cinfo);
nfs_post_op_update_inode(dir, data->res.dir_fattr);
@@ -2905,7 +2963,7 @@ static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
(unsigned long long)cookie);
nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
res.pgbase = args.pgbase;
- status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
+ status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
if (status >= 0) {
memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
status += args.pgbase;
@@ -2997,7 +3055,7 @@ static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
};
nfs_fattr_init(fsstat->fattr);
- return nfs4_call_sync(server, &msg, &args, &res, 0);
+ return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
}
static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
@@ -3028,7 +3086,7 @@ static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
.rpc_resp = &res,
};
- return nfs4_call_sync(server, &msg, &args, &res, 0);
+ return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
}
static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
@@ -3073,7 +3131,7 @@ static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle
}
nfs_fattr_init(pathconf->fattr);
- return nfs4_call_sync(server, &msg, &args, &res, 0);
+ return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
}
static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
@@ -3462,7 +3520,7 @@ static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t bu
resp_buf = buf;
buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
}
- ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
+ ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
if (ret)
goto out_free;
if (res.acl_len > args.acl_len)
@@ -3537,7 +3595,7 @@ static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t bufl
if (i < 0)
return i;
nfs_inode_return_delegation(inode);
- ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
+ ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
/*
* Free each page after tx, so the only ref left is
@@ -3900,7 +3958,7 @@ static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock
lsp = request->fl_u.nfs4_fl.owner;
arg.lock_owner.id = lsp->ls_id.id;
arg.lock_owner.s_dev = server->s_dev;
- status = nfs4_call_sync(server, &msg, &arg, &res, 1);
+ status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
switch (status) {
case 0:
request->fl_type = F_UNLCK;
@@ -4628,12 +4686,46 @@ int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
nfs_fattr_init(&fs_locations->fattr);
fs_locations->server = server;
fs_locations->nlocations = 0;
- status = nfs4_call_sync(server, &msg, &args, &res, 0);
+ status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
nfs_fixup_referral_attributes(&fs_locations->fattr);
dprintk("%s: returned status = %d\n", __func__, status);
return status;
}
+static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
+{
+ int status;
+ struct nfs4_secinfo_arg args = {
+ .dir_fh = NFS_FH(dir),
+ .name = name,
+ };
+ struct nfs4_secinfo_res res = {
+ .flavors = flavors,
+ };
+ struct rpc_message msg = {
+ .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
+ .rpc_argp = &args,
+ .rpc_resp = &res,
+ };
+
+ dprintk("NFS call secinfo %s\n", name->name);
+ status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
+ dprintk("NFS reply secinfo: %d\n", status);
+ return status;
+}
+
+int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
+{
+ struct nfs4_exception exception = { };
+ int err;
+ do {
+ err = nfs4_handle_exception(NFS_SERVER(dir),
+ _nfs4_proc_secinfo(dir, name, flavors),
+ &exception);
+ } while (exception.retry);
+ return err;
+}
+
#ifdef CONFIG_NFS_V4_1
/*
* Check the exchange flags returned by the server for invalid flags, having
@@ -5589,7 +5681,7 @@ _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
int status;
dprintk("--> %s\n", __func__);
- status = nfs4_call_sync(server, &msg, &args, &res, 0);
+ status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
dprintk("<-- %s status=%d\n", __func__, status);
return status;
@@ -5838,6 +5930,7 @@ const struct nfs_rpc_ops nfs_v4_clientops = {
.close_context = nfs4_close_context,
.open_context = nfs4_atomic_open,
.init_client = nfs4_init_client,
+ .secinfo = nfs4_proc_secinfo,
};
static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 40da65e8fa2..dddfb5795d7 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -46,6 +46,7 @@
#include <linux/kdev_t.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/msg_prot.h>
+#include <linux/sunrpc/gss_api.h>
#include <linux/nfs.h>
#include <linux/nfs4.h>
#include <linux/nfs_fs.h>
@@ -112,7 +113,7 @@ static int nfs4_stat_to_errno(int);
#define encode_restorefh_maxsz (op_encode_hdr_maxsz)
#define decode_restorefh_maxsz (op_decode_hdr_maxsz)
#define encode_fsinfo_maxsz (encode_getattr_maxsz)
-#define decode_fsinfo_maxsz (op_decode_hdr_maxsz + 11)
+#define decode_fsinfo_maxsz (op_decode_hdr_maxsz + 15)
#define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
#define decode_renew_maxsz (op_decode_hdr_maxsz)
#define encode_setclientid_maxsz \
@@ -253,6 +254,8 @@ static int nfs4_stat_to_errno(int);
(encode_getattr_maxsz)
#define decode_fs_locations_maxsz \
(0)
+#define encode_secinfo_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
+#define decode_secinfo_maxsz (op_decode_hdr_maxsz + 4 + (NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)))
#if defined(CONFIG_NFS_V4_1)
#define NFS4_MAX_MACHINE_NAME_LEN (64)
@@ -688,6 +691,14 @@ static int nfs4_stat_to_errno(int);
decode_putfh_maxsz + \
decode_lookup_maxsz + \
decode_fs_locations_maxsz)
+#define NFS4_enc_secinfo_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_secinfo_maxsz)
+#define NFS4_dec_secinfo_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_secinfo_maxsz)
#if defined(CONFIG_NFS_V4_1)
#define NFS4_enc_exchange_id_sz \
(compound_encode_hdr_maxsz + \
@@ -1643,6 +1654,18 @@ static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *state
hdr->replen += decode_delegreturn_maxsz;
}
+static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
+{
+ int len = name->len;
+ __be32 *p;
+
+ p = reserve_space(xdr, 8 + len);
+ *p++ = cpu_to_be32(OP_SECINFO);
+ xdr_encode_opaque(p, name->name, len);
+ hdr->nops++;
+ hdr->replen += decode_secinfo_maxsz;
+}
+
#if defined(CONFIG_NFS_V4_1)
/* NFSv4.1 operations */
static void encode_exchange_id(struct xdr_stream *xdr,
@@ -2517,6 +2540,24 @@ static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
encode_nops(&hdr);
}
+/*
+ * Encode SECINFO request
+ */
+static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs4_secinfo_arg *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, args->dir_fh, &hdr);
+ encode_secinfo(xdr, args->name, &hdr);
+ encode_nops(&hdr);
+}
+
#if defined(CONFIG_NFS_V4_1)
/*
* EXCHANGE_ID request
@@ -3001,6 +3042,7 @@ static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap)
if (unlikely(!p))
goto out_overflow;
bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
+ return -be32_to_cpup(p);
}
return 0;
out_overflow:
@@ -3988,6 +4030,10 @@ static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
fattr->valid |= status;
status = decode_attr_error(xdr, bitmap);
+ if (status == -NFS4ERR_WRONGSEC) {
+ nfs_fixup_secinfo_attributes(fattr, fh);
+ status = 0;
+ }
if (status < 0)
goto xdr_error;
@@ -4756,6 +4802,73 @@ static int decode_delegreturn(struct xdr_stream *xdr)
return decode_op_hdr(xdr, OP_DELEGRETURN);
}
+static int decode_secinfo_gss(struct xdr_stream *xdr, struct nfs4_secinfo_flavor *flavor)
+{
+ __be32 *p;
+
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ flavor->gss.sec_oid4.len = be32_to_cpup(p);
+ if (flavor->gss.sec_oid4.len > GSS_OID_MAX_LEN)
+ goto out_err;
+
+ p = xdr_inline_decode(xdr, flavor->gss.sec_oid4.len);
+ if (unlikely(!p))
+ goto out_overflow;
+ memcpy(flavor->gss.sec_oid4.data, p, flavor->gss.sec_oid4.len);
+
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+ flavor->gss.qop4 = be32_to_cpup(p++);
+ flavor->gss.service = be32_to_cpup(p);
+
+ return 0;
+
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+out_err:
+ return -EINVAL;
+}
+
+static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
+{
+ struct nfs4_secinfo_flavor *sec_flavor;
+ int status;
+ __be32 *p;
+ int i;
+
+ status = decode_op_hdr(xdr, OP_SECINFO);
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ res->flavors->num_flavors = be32_to_cpup(p);
+
+ for (i = 0; i < res->flavors->num_flavors; i++) {
+ sec_flavor = &res->flavors->flavors[i];
+ if ((char *)&sec_flavor[1] - (char *)res > PAGE_SIZE)
+ break;
+
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ sec_flavor->flavor = be32_to_cpup(p);
+
+ if (sec_flavor->flavor == RPC_AUTH_GSS) {
+ if (decode_secinfo_gss(xdr, sec_flavor))
+ break;
+ }
+ }
+
+ return 0;
+
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
#if defined(CONFIG_NFS_V4_1)
static int decode_exchange_id(struct xdr_stream *xdr,
struct nfs41_exchange_id_res *res)
@@ -6031,6 +6144,32 @@ out:
return status;
}
+/*
+ * Decode SECINFO response
+ */
+static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ struct nfs4_secinfo_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_secinfo(xdr, res);
+ if (status)
+ goto out;
+out:
+ return status;
+}
+
#if defined(CONFIG_NFS_V4_1)
/*
* Decode EXCHANGE_ID response
@@ -6320,10 +6459,6 @@ static struct {
{ NFS4ERR_SYMLINK, -ELOOP },
{ NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
{ NFS4ERR_DEADLOCK, -EDEADLK },
- { NFS4ERR_WRONGSEC, -EPERM }, /* FIXME: this needs
- * to be handled by a
- * middle-layer.
- */
{ -1, -EIO }
};
@@ -6398,6 +6533,7 @@ struct rpc_procinfo nfs4_procedures[] = {
PROC(SETACL, enc_setacl, dec_setacl),
PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
+ PROC(SECINFO, enc_secinfo, dec_secinfo),
#if defined(CONFIG_NFS_V4_1)
PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
PROC(CREATE_SESSION, enc_create_session, dec_create_session),
diff --git a/fs/nfs/proc.c b/fs/nfs/proc.c
index b8ec170f2a0..ac40b8535d7 100644
--- a/fs/nfs/proc.c
+++ b/fs/nfs/proc.c
@@ -177,7 +177,7 @@ nfs_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
}
static int
-nfs_proc_lookup(struct inode *dir, struct qstr *name,
+nfs_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
struct nfs_fh *fhandle, struct nfs_fattr *fattr)
{
struct nfs_diropargs arg = {
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 7e13e1a6b39..2b8e9a5e366 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -263,8 +263,11 @@ static match_table_t nfs_local_lock_tokens = {
static void nfs_umount_begin(struct super_block *);
static int nfs_statfs(struct dentry *, struct kstatfs *);
static int nfs_show_options(struct seq_file *, struct vfsmount *);
+static int nfs_show_devname(struct seq_file *, struct vfsmount *);
+static int nfs_show_path(struct seq_file *, struct vfsmount *);
static int nfs_show_stats(struct seq_file *, struct vfsmount *);
-static int nfs_get_sb(struct file_system_type *, int, const char *, void *, struct vfsmount *);
+static struct dentry *nfs_fs_mount(struct file_system_type *,
+ int, const char *, void *);
static struct dentry *nfs_xdev_mount(struct file_system_type *fs_type,
int flags, const char *dev_name, void *raw_data);
static void nfs_put_super(struct super_block *);
@@ -274,7 +277,7 @@ static int nfs_remount(struct super_block *sb, int *flags, char *raw_data);
static struct file_system_type nfs_fs_type = {
.owner = THIS_MODULE,
.name = "nfs",
- .get_sb = nfs_get_sb,
+ .mount = nfs_fs_mount,
.kill_sb = nfs_kill_super,
.fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
};
@@ -296,6 +299,8 @@ static const struct super_operations nfs_sops = {
.evict_inode = nfs_evict_inode,
.umount_begin = nfs_umount_begin,
.show_options = nfs_show_options,
+ .show_devname = nfs_show_devname,
+ .show_path = nfs_show_path,
.show_stats = nfs_show_stats,
.remount_fs = nfs_remount,
};
@@ -303,16 +308,16 @@ static const struct super_operations nfs_sops = {
#ifdef CONFIG_NFS_V4
static int nfs4_validate_text_mount_data(void *options,
struct nfs_parsed_mount_data *args, const char *dev_name);
-static int nfs4_try_mount(int flags, const char *dev_name,
- struct nfs_parsed_mount_data *data, struct vfsmount *mnt);
-static int nfs4_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
+static struct dentry *nfs4_try_mount(int flags, const char *dev_name,
+ struct nfs_parsed_mount_data *data);
+static struct dentry *nfs4_mount(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *raw_data);
static struct dentry *nfs4_remote_mount(struct file_system_type *fs_type,
int flags, const char *dev_name, void *raw_data);
static struct dentry *nfs4_xdev_mount(struct file_system_type *fs_type,
int flags, const char *dev_name, void *raw_data);
-static int nfs4_referral_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
+static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *raw_data);
static struct dentry *nfs4_remote_referral_mount(struct file_system_type *fs_type,
int flags, const char *dev_name, void *raw_data);
static void nfs4_kill_super(struct super_block *sb);
@@ -320,7 +325,7 @@ static void nfs4_kill_super(struct super_block *sb);
static struct file_system_type nfs4_fs_type = {
.owner = THIS_MODULE,
.name = "nfs4",
- .get_sb = nfs4_get_sb,
+ .mount = nfs4_mount,
.kill_sb = nfs4_kill_super,
.fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
};
@@ -352,7 +357,7 @@ static struct file_system_type nfs4_remote_referral_fs_type = {
struct file_system_type nfs4_referral_fs_type = {
.owner = THIS_MODULE,
.name = "nfs4",
- .get_sb = nfs4_referral_get_sb,
+ .mount = nfs4_referral_mount,
.kill_sb = nfs4_kill_super,
.fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
};
@@ -366,6 +371,8 @@ static const struct super_operations nfs4_sops = {
.evict_inode = nfs4_evict_inode,
.umount_begin = nfs_umount_begin,
.show_options = nfs_show_options,
+ .show_devname = nfs_show_devname,
+ .show_path = nfs_show_path,
.show_stats = nfs_show_stats,
.remount_fs = nfs_remount,
};
@@ -726,6 +733,28 @@ static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt)
return 0;
}
+static int nfs_show_devname(struct seq_file *m, struct vfsmount *mnt)
+{
+ char *page = (char *) __get_free_page(GFP_KERNEL);
+ char *devname, *dummy;
+ int err = 0;
+ if (!page)
+ return -ENOMEM;
+ devname = nfs_path(&dummy, mnt->mnt_root, page, PAGE_SIZE);
+ if (IS_ERR(devname))
+ err = PTR_ERR(devname);
+ else
+ seq_escape(m, devname, " \t\n\\");
+ free_page((unsigned long)page);
+ return err;
+}
+
+static int nfs_show_path(struct seq_file *m, struct vfsmount *mnt)
+{
+ seq_puts(m, "/");
+ return 0;
+}
+
/*
* Present statistical information for this VFS mountpoint
*/
@@ -2137,19 +2166,19 @@ static int nfs_bdi_register(struct nfs_server *server)
return bdi_register_dev(&server->backing_dev_info, server->s_dev);
}
-static int nfs_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
+static struct dentry *nfs_fs_mount(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *raw_data)
{
struct nfs_server *server = NULL;
struct super_block *s;
struct nfs_parsed_mount_data *data;
struct nfs_fh *mntfh;
- struct dentry *mntroot;
+ struct dentry *mntroot = ERR_PTR(-ENOMEM);
int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
struct nfs_sb_mountdata sb_mntdata = {
.mntflags = flags,
};
- int error = -ENOMEM;
+ int error;
data = nfs_alloc_parsed_mount_data(NFS_DEFAULT_VERSION);
mntfh = nfs_alloc_fhandle();
@@ -2160,12 +2189,14 @@ static int nfs_get_sb(struct file_system_type *fs_type,
/* Validate the mount data */
error = nfs_validate_mount_data(raw_data, data, mntfh, dev_name);
- if (error < 0)
+ if (error < 0) {
+ mntroot = ERR_PTR(error);
goto out;
+ }
#ifdef CONFIG_NFS_V4
if (data->version == 4) {
- error = nfs4_try_mount(flags, dev_name, data, mnt);
+ mntroot = nfs4_try_mount(flags, dev_name, data);
kfree(data->client_address);
kfree(data->nfs_server.export_path);
goto out;
@@ -2175,7 +2206,7 @@ static int nfs_get_sb(struct file_system_type *fs_type,
/* Get a volume representation */
server = nfs_create_server(data, mntfh);
if (IS_ERR(server)) {
- error = PTR_ERR(server);
+ mntroot = ERR_CAST(server);
goto out;
}
sb_mntdata.server = server;
@@ -2186,7 +2217,7 @@ static int nfs_get_sb(struct file_system_type *fs_type,
/* Get a superblock - note that we may end up sharing one that already exists */
s = sget(fs_type, compare_super, nfs_set_super, &sb_mntdata);
if (IS_ERR(s)) {
- error = PTR_ERR(s);
+ mntroot = ERR_CAST(s);
goto out_err_nosb;
}
@@ -2195,8 +2226,10 @@ static int nfs_get_sb(struct file_system_type *fs_type,
server = NULL;
} else {
error = nfs_bdi_register(server);
- if (error)
+ if (error) {
+ mntroot = ERR_PTR(error);
goto error_splat_bdi;
+ }
}
if (!s->s_root) {
@@ -2206,20 +2239,15 @@ static int nfs_get_sb(struct file_system_type *fs_type,
s, data ? data->fscache_uniq : NULL, NULL);
}
- mntroot = nfs_get_root(s, mntfh);
- if (IS_ERR(mntroot)) {
- error = PTR_ERR(mntroot);
+ mntroot = nfs_get_root(s, mntfh, dev_name);
+ if (IS_ERR(mntroot))
goto error_splat_super;
- }
error = security_sb_set_mnt_opts(s, &data->lsm_opts);
if (error)
goto error_splat_root;
s->s_flags |= MS_ACTIVE;
- mnt->mnt_sb = s;
- mnt->mnt_root = mntroot;
- error = 0;
out:
kfree(data->nfs_server.hostname);
@@ -2229,7 +2257,7 @@ out:
out_free_fh:
nfs_free_fhandle(mntfh);
kfree(data);
- return error;
+ return mntroot;
out_err_nosb:
nfs_free_server(server);
@@ -2237,6 +2265,7 @@ out_err_nosb:
error_splat_root:
dput(mntroot);
+ mntroot = ERR_PTR(error);
error_splat_super:
if (server && !s->s_root)
bdi_unregister(&server->backing_dev_info);
@@ -2320,7 +2349,7 @@ nfs_xdev_mount(struct file_system_type *fs_type, int flags,
nfs_fscache_get_super_cookie(s, NULL, data);
}
- mntroot = nfs_get_root(s, data->fh);
+ mntroot = nfs_get_root(s, data->fh, dev_name);
if (IS_ERR(mntroot)) {
error = PTR_ERR(mntroot);
goto error_splat_super;
@@ -2588,7 +2617,7 @@ nfs4_remote_mount(struct file_system_type *fs_type, int flags,
s, data ? data->fscache_uniq : NULL, NULL);
}
- mntroot = nfs4_get_root(s, mntfh);
+ mntroot = nfs4_get_root(s, mntfh, dev_name);
if (IS_ERR(mntroot)) {
error = PTR_ERR(mntroot);
goto error_splat_super;
@@ -2641,27 +2670,6 @@ static struct vfsmount *nfs_do_root_mount(struct file_system_type *fs_type,
return root_mnt;
}
-static void nfs_fix_devname(const struct path *path, struct vfsmount *mnt)
-{
- char *page = (char *) __get_free_page(GFP_KERNEL);
- char *devname, *tmp;
-
- if (page == NULL)
- return;
- devname = nfs_path(path->mnt->mnt_devname,
- path->mnt->mnt_root, path->dentry,
- page, PAGE_SIZE);
- if (IS_ERR(devname))
- goto out_freepage;
- tmp = kstrdup(devname, GFP_KERNEL);
- if (tmp == NULL)
- goto out_freepage;
- kfree(mnt->mnt_devname);
- mnt->mnt_devname = tmp;
-out_freepage:
- free_page((unsigned long)page);
-}
-
struct nfs_referral_count {
struct list_head list;
const struct task_struct *task;
@@ -2728,17 +2736,18 @@ static void nfs_referral_loop_unprotect(void)
kfree(p);
}
-static int nfs_follow_remote_path(struct vfsmount *root_mnt,
- const char *export_path, struct vfsmount *mnt_target)
+static struct dentry *nfs_follow_remote_path(struct vfsmount *root_mnt,
+ const char *export_path)
{
struct nameidata *nd = NULL;
struct mnt_namespace *ns_private;
struct super_block *s;
+ struct dentry *dentry;
int ret;
nd = kmalloc(sizeof(*nd), GFP_KERNEL);
if (nd == NULL)
- return -ENOMEM;
+ return ERR_PTR(-ENOMEM);
ns_private = create_mnt_ns(root_mnt);
ret = PTR_ERR(ns_private);
@@ -2760,32 +2769,27 @@ static int nfs_follow_remote_path(struct vfsmount *root_mnt,
s = nd->path.mnt->mnt_sb;
atomic_inc(&s->s_active);
- mnt_target->mnt_sb = s;
- mnt_target->mnt_root = dget(nd->path.dentry);
-
- /* Correct the device pathname */
- nfs_fix_devname(&nd->path, mnt_target);
+ dentry = dget(nd->path.dentry);
path_put(&nd->path);
kfree(nd);
down_write(&s->s_umount);
- return 0;
+ return dentry;
out_put_mnt_ns:
put_mnt_ns(ns_private);
out_mntput:
mntput(root_mnt);
out_err:
kfree(nd);
- return ret;
+ return ERR_PTR(ret);
}
-static int nfs4_try_mount(int flags, const char *dev_name,
- struct nfs_parsed_mount_data *data,
- struct vfsmount *mnt)
+static struct dentry *nfs4_try_mount(int flags, const char *dev_name,
+ struct nfs_parsed_mount_data *data)
{
char *export_path;
struct vfsmount *root_mnt;
- int error;
+ struct dentry *res;
dfprintk(MOUNT, "--> nfs4_try_mount()\n");
@@ -2795,26 +2799,25 @@ static int nfs4_try_mount(int flags, const char *dev_name,
data->nfs_server.hostname);
data->nfs_server.export_path = export_path;
- error = PTR_ERR(root_mnt);
- if (IS_ERR(root_mnt))
- goto out;
+ res = ERR_CAST(root_mnt);
+ if (!IS_ERR(root_mnt))
+ res = nfs_follow_remote_path(root_mnt, export_path);
- error = nfs_follow_remote_path(root_mnt, export_path, mnt);
-
-out:
- dfprintk(MOUNT, "<-- nfs4_try_mount() = %d%s\n", error,
- error != 0 ? " [error]" : "");
- return error;
+ dfprintk(MOUNT, "<-- nfs4_try_mount() = %ld%s\n",
+ IS_ERR(res) ? PTR_ERR(res) : 0,
+ IS_ERR(res) ? " [error]" : "");
+ return res;
}
/*
* Get the superblock for an NFS4 mountpoint
*/
-static int nfs4_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
+static struct dentry *nfs4_mount(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *raw_data)
{
struct nfs_parsed_mount_data *data;
int error = -ENOMEM;
+ struct dentry *res = ERR_PTR(-ENOMEM);
data = nfs_alloc_parsed_mount_data(4);
if (data == NULL)
@@ -2822,10 +2825,14 @@ static int nfs4_get_sb(struct file_system_type *fs_type,
/* Validate the mount data */
error = nfs4_validate_mount_data(raw_data, data, dev_name);
- if (error < 0)
+ if (error < 0) {
+ res = ERR_PTR(error);
goto out;
+ }
- error = nfs4_try_mount(flags, dev_name, data, mnt);
+ res = nfs4_try_mount(flags, dev_name, data);
+ if (IS_ERR(res))
+ error = PTR_ERR(res);
out:
kfree(data->client_address);
@@ -2834,9 +2841,9 @@ out:
kfree(data->fscache_uniq);
out_free_data:
kfree(data);
- dprintk("<-- nfs4_get_sb() = %d%s\n", error,
+ dprintk("<-- nfs4_mount() = %d%s\n", error,
error != 0 ? " [error]" : "");
- return error;
+ return res;
}
static void nfs4_kill_super(struct super_block *sb)
@@ -2903,7 +2910,7 @@ nfs4_xdev_mount(struct file_system_type *fs_type, int flags,
nfs_fscache_get_super_cookie(s, NULL, data);
}
- mntroot = nfs4_get_root(s, data->fh);
+ mntroot = nfs4_get_root(s, data->fh, dev_name);
if (IS_ERR(mntroot)) {
error = PTR_ERR(mntroot);
goto error_splat_super;
@@ -2990,7 +2997,7 @@ nfs4_remote_referral_mount(struct file_system_type *fs_type, int flags,
nfs_fscache_get_super_cookie(s, NULL, data);
}
- mntroot = nfs4_get_root(s, mntfh);
+ mntroot = nfs4_get_root(s, mntfh, dev_name);
if (IS_ERR(mntroot)) {
error = PTR_ERR(mntroot);
goto error_splat_super;
@@ -3030,16 +3037,15 @@ error_splat_bdi:
/*
* Create an NFS4 server record on referral traversal
*/
-static int nfs4_referral_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data,
- struct vfsmount *mnt)
+static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *raw_data)
{
struct nfs_clone_mount *data = raw_data;
char *export_path;
struct vfsmount *root_mnt;
- int error;
+ struct dentry *res;
- dprintk("--> nfs4_referral_get_sb()\n");
+ dprintk("--> nfs4_referral_mount()\n");
export_path = data->mnt_path;
data->mnt_path = "/";
@@ -3048,15 +3054,13 @@ static int nfs4_referral_get_sb(struct file_system_type *fs_type,
flags, data, data->hostname);
data->mnt_path = export_path;
- error = PTR_ERR(root_mnt);
- if (IS_ERR(root_mnt))
- goto out;
-
- error = nfs_follow_remote_path(root_mnt, export_path, mnt);
-out:
- dprintk("<-- nfs4_referral_get_sb() = %d%s\n", error,
- error != 0 ? " [error]" : "");
- return error;
+ res = ERR_CAST(root_mnt);
+ if (!IS_ERR(root_mnt))
+ res = nfs_follow_remote_path(root_mnt, export_path);
+ dprintk("<-- nfs4_referral_mount() = %ld%s\n",
+ IS_ERR(res) ? PTR_ERR(res) : 0,
+ IS_ERR(res) ? " [error]" : "");
+ return res;
}
#endif /* CONFIG_NFS_V4 */
diff --git a/fs/nfs/unlink.c b/fs/nfs/unlink.c
index 6481d537d69..8d6864c2a5f 100644
--- a/fs/nfs/unlink.c
+++ b/fs/nfs/unlink.c
@@ -148,6 +148,7 @@ static int nfs_do_call_unlink(struct dentry *parent, struct inode *dir, struct n
alias = d_lookup(parent, &data->args.name);
if (alias != NULL) {
int ret = 0;
+ void *devname_garbage = NULL;
/*
* Hey, we raced with lookup... See if we need to transfer
@@ -157,6 +158,7 @@ static int nfs_do_call_unlink(struct dentry *parent, struct inode *dir, struct n
spin_lock(&alias->d_lock);
if (alias->d_inode != NULL &&
!(alias->d_flags & DCACHE_NFSFS_RENAMED)) {
+ devname_garbage = alias->d_fsdata;
alias->d_fsdata = data;
alias->d_flags |= DCACHE_NFSFS_RENAMED;
ret = 1;
@@ -164,6 +166,13 @@ static int nfs_do_call_unlink(struct dentry *parent, struct inode *dir, struct n
spin_unlock(&alias->d_lock);
nfs_dec_sillycount(dir);
dput(alias);
+ /*
+ * If we'd displaced old cached devname, free it. At that
+ * point dentry is definitely not a root, so we won't need
+ * that anymore.
+ */
+ if (devname_garbage)
+ kfree(devname_garbage);
return ret;
}
data->dir = igrab(dir);
@@ -252,6 +261,7 @@ nfs_async_unlink(struct inode *dir, struct dentry *dentry)
{
struct nfs_unlinkdata *data;
int status = -ENOMEM;
+ void *devname_garbage = NULL;
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (data == NULL)
@@ -269,8 +279,16 @@ nfs_async_unlink(struct inode *dir, struct dentry *dentry)
if (dentry->d_flags & DCACHE_NFSFS_RENAMED)
goto out_unlock;
dentry->d_flags |= DCACHE_NFSFS_RENAMED;
+ devname_garbage = dentry->d_fsdata;
dentry->d_fsdata = data;
spin_unlock(&dentry->d_lock);
+ /*
+ * If we'd displaced old cached devname, free it. At that
+ * point dentry is definitely not a root, so we won't need
+ * that anymore.
+ */
+ if (devname_garbage)
+ kfree(devname_garbage);
return 0;
out_unlock:
spin_unlock(&dentry->d_lock);
@@ -299,6 +317,7 @@ nfs_complete_unlink(struct dentry *dentry, struct inode *inode)
if (dentry->d_flags & DCACHE_NFSFS_RENAMED) {
dentry->d_flags &= ~DCACHE_NFSFS_RENAMED;
data = dentry->d_fsdata;
+ dentry->d_fsdata = NULL;
}
spin_unlock(&dentry->d_lock);
@@ -315,6 +334,7 @@ nfs_cancel_async_unlink(struct dentry *dentry)
struct nfs_unlinkdata *data = dentry->d_fsdata;
dentry->d_flags &= ~DCACHE_NFSFS_RENAMED;
+ dentry->d_fsdata = NULL;
spin_unlock(&dentry->d_lock);
nfs_free_unlinkdata(data);
return;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-01-05 01:14:50 +0000