static struct inode *nfs_alloc_inode(struct super_block *sb);
static void nfs_destroy_inode(struct inode *);
static int nfs_write_inode(struct inode *,int);
-static void nfs_delete_inode(struct inode *);
static void nfs_clear_inode(struct inode *);
-static void nfs_umount_begin(struct super_block *);
+static void nfs_umount_begin(struct vfsmount *, int);
static int nfs_statfs(struct super_block *, struct kstatfs *);
static int nfs_show_options(struct seq_file *, struct vfsmount *);
static int nfs_show_stats(struct seq_file *, struct vfsmount *);
.alloc_inode = nfs_alloc_inode,
.destroy_inode = nfs_destroy_inode,
.write_inode = nfs_write_inode,
- .delete_inode = nfs_delete_inode,
.statfs = nfs_statfs,
.clear_inode = nfs_clear_inode,
.umount_begin = nfs_umount_begin,
return 0;
}
-static void
-nfs_delete_inode(struct inode * inode)
-{
- dprintk("NFS: delete_inode(%s/%ld)\n", inode->i_sb->s_id, inode->i_ino);
-
- truncate_inode_pages(&inode->i_data, 0);
-
- nfs_wb_all(inode);
- /*
- * The following should never happen...
- */
- if (nfs_have_writebacks(inode)) {
- printk(KERN_ERR "nfs_delete_inode: inode %ld has pending RPC requests\n", inode->i_ino);
- }
-
- clear_inode(inode);
-}
-
static void
nfs_clear_inode(struct inode *inode)
{
struct nfs_inode *nfsi = NFS_I(inode);
struct rpc_cred *cred;
- nfs_wb_all(inode);
+ /*
+ * The following should never happen...
+ */
+ BUG_ON(nfs_have_writebacks(inode));
BUG_ON (!list_empty(&nfsi->open_files));
nfs_zap_acl_cache(inode);
cred = nfsi->cache_access.cred;
BUG_ON(atomic_read(&nfsi->data_updates) != 0);
}
-void
-nfs_umount_begin(struct super_block *sb)
+static void nfs_umount_begin(struct vfsmount *vfsmnt, int flags)
{
- struct rpc_clnt *rpc = NFS_SB(sb)->client;
+ struct nfs_server *server;
+ struct rpc_clnt *rpc;
+ shrink_submounts(vfsmnt, &nfs_automount_list);
+ if (!(flags & MNT_FORCE))
+ return;
/* -EIO all pending I/O */
+ server = NFS_SB(vfsmnt->mnt_sb);
+ rpc = server->client;
if (!IS_ERR(rpc))
rpc_killall_tasks(rpc);
- rpc = NFS_SB(sb)->client_acl;
+ rpc = server->client_acl;
if (!IS_ERR(rpc))
rpc_killall_tasks(rpc);
}
return nfs_block_bits(bsize, nrbitsp);
}
+static inline void
+nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
+{
+ sb->s_maxbytes = (loff_t)maxfilesize;
+ if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0)
+ sb->s_maxbytes = MAX_LFS_FILESIZE;
+}
+
/*
* Obtain the root inode of the file system.
*/
return ERR_PTR(error);
}
+ server->fsid = fsinfo->fattr->fsid;
return nfs_fhget(sb, rootfh, fsinfo->fattr);
}
}
server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
- sb->s_maxbytes = fsinfo.maxfilesize;
- if (sb->s_maxbytes > MAX_LFS_FILESIZE)
- sb->s_maxbytes = MAX_LFS_FILESIZE;
+ nfs_super_set_maxbytes(sb, fsinfo.maxfilesize);
server->client->cl_intr = (server->flags & NFS_MOUNT_INTR) ? 1 : 0;
server->client->cl_softrtry = (server->flags & NFS_MOUNT_SOFT) ? 1 : 0;
/*
* Display superblock I/O counters
*/
- for (cpu = 0; cpu < NR_CPUS; cpu++) {
+ for_each_possible_cpu(cpu) {
struct nfs_iostats *stats;
- if (!cpu_possible(cpu))
- continue;
-
preempt_disable();
stats = per_cpu_ptr(nfss->io_stats, cpu);
if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS)
&& fattr->size <= NFS_LIMIT_READDIRPLUS)
set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode));
+ /* Deal with crossing mountpoints */
+ if (!nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) {
+ inode->i_op = &nfs_mountpoint_inode_operations;
+ inode->i_fop = NULL;
+ }
} else if (S_ISLNK(inode->i_mode))
inode->i_op = &nfs_symlink_inode_operations;
else
dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n",
inode->i_sb->s_id, (long long)NFS_FILEID(inode));
+ nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
lock_kernel();
if (!inode || is_bad_inode(inode))
goto out_nowait;
status = -ESTALE;
/* Do we trust the cached ESTALE? */
if (NFS_ATTRTIMEO(inode) != 0) {
- if (nfsi->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ATIME)) {
+ if (nfsi->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME)) {
/* no */
} else
goto out;
}
spin_unlock(&inode->i_lock);
- nfs_revalidate_mapping(inode, inode->i_mapping);
-
if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
nfs_zap_acl_cache(inode);
*/
int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
{
- nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
- if (!(NFS_I(inode)->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA))
+ if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR)
&& !nfs_attribute_timeout(inode))
return NFS_STALE(inode) ? -ESTALE : 0;
return __nfs_revalidate_inode(server, inode);
* @inode - pointer to host inode
* @mapping - pointer to mapping
*/
-void nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
+int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
{
struct nfs_inode *nfsi = NFS_I(inode);
+ int ret = 0;
+
+ if (NFS_STALE(inode))
+ ret = -ESTALE;
+ if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
+ || nfs_attribute_timeout(inode))
+ ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
if (nfsi->cache_validity & NFS_INO_INVALID_DATA) {
nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
inode->i_sb->s_id,
(long long)NFS_FILEID(inode));
}
+ return ret;
}
/**
{
struct nfs_inode *nfsi = NFS_I(inode);
- if ((fattr->valid & NFS_ATTR_PRE_CHANGE) != 0
- && nfsi->change_attr == fattr->pre_change_attr) {
- nfsi->change_attr = fattr->change_attr;
- nfsi->cache_change_attribute = jiffies;
- }
-
/* If we have atomic WCC data, we may update some attributes */
if ((fattr->valid & NFS_ATTR_WCC) != 0) {
if (timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) {
int data_unstable;
- if ((fattr->valid & NFS_ATTR_FATTR) == 0)
- return 0;
-
/* Has the inode gone and changed behind our back? */
if (nfsi->fileid != fattr->fileid
|| (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) {
/* Do atomic weak cache consistency updates */
nfs_wcc_update_inode(inode, fattr);
- if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0) {
- if (nfsi->change_attr == fattr->change_attr)
- goto out;
- nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
- if (!data_unstable)
- nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE;
- }
+ if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 &&
+ nfsi->change_attr != fattr->change_attr)
+ nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
/* Verify a few of the more important attributes */
- if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) {
- nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
- if (!data_unstable)
- nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE;
- }
+ if (!timespec_equal(&inode->i_mtime, &fattr->mtime))
+ nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
cur_size = i_size_read(inode);
new_isize = nfs_size_to_loff_t(fattr->size);
if (inode->i_nlink != fattr->nlink)
nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
-out:
if (!timespec_equal(&inode->i_atime, &fattr->atime))
nfsi->cache_validity |= NFS_INO_INVALID_ATIME;
if ((fattr->valid & NFS_ATTR_FATTR) == 0)
return 0;
spin_lock(&inode->i_lock);
- nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE;
if (time_after(fattr->time_start, nfsi->last_updated))
status = nfs_update_inode(inode, fattr);
else
spin_lock(&inode->i_lock);
if (unlikely((fattr->valid & NFS_ATTR_FATTR) == 0)) {
- nfsi->cache_validity |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS;
+ nfsi->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
goto out;
}
status = nfs_update_inode(inode, fattr);
*/
static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
{
+ struct nfs_server *server;
struct nfs_inode *nfsi = NFS_I(inode);
loff_t cur_isize, new_isize;
unsigned int invalid = 0;
__FUNCTION__, inode->i_sb->s_id, inode->i_ino,
atomic_read(&inode->i_count), fattr->valid);
- if ((fattr->valid & NFS_ATTR_FATTR) == 0)
- return 0;
-
if (nfsi->fileid != fattr->fileid)
goto out_fileid;
if ((inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
goto out_changed;
+ server = NFS_SERVER(inode);
+ /* Update the fsid if and only if this is the root directory */
+ if (inode == inode->i_sb->s_root->d_inode
+ && !nfs_fsid_equal(&server->fsid, &fattr->fsid))
+ server->fsid = fattr->fsid;
+
/*
* Update the read time so we don't revalidate too often.
*/
/* Are we racing with known updates of the metadata on the server? */
data_stable = nfs_verify_change_attribute(inode, fattr->time_start);
if (data_stable)
- nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME);
+ nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_ATIME);
/* Do atomic weak cache consistency updates */
nfs_wcc_update_inode(inode, fattr);
inode->i_blksize = fattr->du.nfs2.blocksize;
}
- if ((fattr->valid & NFS_ATTR_FATTR_V4)) {
- if (nfsi->change_attr != fattr->change_attr) {
- dprintk("NFS: change_attr change on server for file %s/%ld\n",
- inode->i_sb->s_id, inode->i_ino);
- nfsi->change_attr = fattr->change_attr;
- invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
- nfsi->cache_change_attribute = jiffies;
- } else
- invalid &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA);
+ if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 &&
+ nfsi->change_attr != fattr->change_attr) {
+ dprintk("NFS: change_attr change on server for file %s/%ld\n",
+ inode->i_sb->s_id, inode->i_ino);
+ nfsi->change_attr = fattr->change_attr;
+ invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
+ nfsi->cache_change_attribute = jiffies;
}
/* Update attrtimeo value if we're out of the unstable period */
* File system information
*/
+/*
+ * nfs_path - reconstruct the path given an arbitrary dentry
+ * @base - arbitrary string to prepend to the 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.
+ *
+ * This is mainly for use in figuring out the path on the
+ * server side when automounting on top of an existing partition.
+ */
+static char *nfs_path(const char *base, const struct dentry *dentry,
+ char *buffer, ssize_t buflen)
+{
+ char *end = buffer+buflen;
+ int namelen;
+
+ *--end = '\0';
+ buflen--;
+ spin_lock(&dcache_lock);
+ while (!IS_ROOT(dentry)) {
+ namelen = dentry->d_name.len;
+ buflen -= namelen + 1;
+ if (buflen < 0)
+ goto Elong;
+ end -= namelen;
+ memcpy(end, dentry->d_name.name, namelen);
+ *--end = '/';
+ dentry = dentry->d_parent;
+ }
+ spin_unlock(&dcache_lock);
+ namelen = strlen(base);
+ /* Strip off excess slashes in base string */
+ while (namelen > 0 && base[namelen - 1] == '/')
+ namelen--;
+ buflen -= namelen;
+ if (buflen < 0)
+ goto Elong;
+ end -= namelen;
+ memcpy(end, base, namelen);
+ return end;
+Elong:
+ return ERR_PTR(-ENAMETOOLONG);
+}
+
+struct nfs_clone_mount {
+ const struct super_block *sb;
+ const struct dentry *dentry;
+ struct nfs_fh *fh;
+ struct nfs_fattr *fattr;
+};
+
+static struct super_block *nfs_clone_generic_sb(struct nfs_clone_mount *data,
+ struct super_block *(*clone_client)(struct nfs_server *, struct nfs_clone_mount *))
+{
+ struct nfs_server *server;
+ struct nfs_server *parent = NFS_SB(data->sb);
+ struct super_block *sb = ERR_PTR(-EINVAL);
+ void *err = ERR_PTR(-ENOMEM);
+ struct inode *root_inode;
+ struct nfs_fsinfo fsinfo;
+ int len;
+
+ server = kmalloc(sizeof(struct nfs_server), GFP_KERNEL);
+ if (server == NULL)
+ goto out_err;
+ memcpy(server, parent, sizeof(*server));
+ len = strlen(parent->hostname) + 1;
+ server->hostname = kmalloc(len, GFP_KERNEL);
+ if (server->hostname == NULL)
+ goto free_server;
+ memcpy(server->hostname, parent->hostname, len);
+ server->fsid = data->fattr->fsid;
+ nfs_copy_fh(&server->fh, data->fh);
+ if (rpciod_up() != 0)
+ goto free_hostname;
+
+ sb = clone_client(server, data);
+ if (IS_ERR((err = sb)) || sb->s_root)
+ goto kill_rpciod;
+
+ sb->s_op = data->sb->s_op;
+ sb->s_blocksize = data->sb->s_blocksize;
+ sb->s_blocksize_bits = data->sb->s_blocksize_bits;
+ sb->s_maxbytes = data->sb->s_maxbytes;
+
+ server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
+ err = ERR_PTR(-ENOMEM);
+ server->io_stats = nfs_alloc_iostats();
+ if (server->io_stats == NULL)
+ goto out_deactivate;
+
+ server->client = rpc_clone_client(parent->client);
+ if (IS_ERR((err = server->client)))
+ goto out_deactivate;
+ if (!IS_ERR(parent->client_sys)) {
+ server->client_sys = rpc_clone_client(parent->client_sys);
+ if (IS_ERR((err = server->client_sys)))
+ goto out_deactivate;
+ }
+ if (!IS_ERR(parent->client_acl)) {
+ server->client_acl = rpc_clone_client(parent->client_acl);
+ if (IS_ERR((err = server->client_acl)))
+ goto out_deactivate;
+ }
+ root_inode = nfs_fhget(sb, data->fh, data->fattr);
+ if (!root_inode)
+ goto out_deactivate;
+ sb->s_root = d_alloc_root(root_inode);
+ if (!sb->s_root)
+ goto out_put_root;
+ fsinfo.fattr = data->fattr;
+ if (NFS_PROTO(root_inode)->fsinfo(server, data->fh, &fsinfo) == 0)
+ nfs_super_set_maxbytes(sb, fsinfo.maxfilesize);
+ sb->s_root->d_op = server->rpc_ops->dentry_ops;
+ sb->s_flags |= MS_ACTIVE;
+ return sb;
+out_put_root:
+ iput(root_inode);
+out_deactivate:
+ up_write(&sb->s_umount);
+ deactivate_super(sb);
+ return (struct super_block *)err;
+kill_rpciod:
+ rpciod_down();
+free_hostname:
+ kfree(server->hostname);
+free_server:
+ kfree(server);
+out_err:
+ return (struct super_block *)err;
+}
+
static int nfs_set_super(struct super_block *s, void *data)
{
s->s_fs_info = data;
nfs_free_iostats(server->io_stats);
kfree(server->hostname);
kfree(server);
+ nfs_release_automount_timer();
}
static struct file_system_type nfs_fs_type = {
.fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
};
+static struct super_block *nfs_clone_client(struct nfs_server *server, struct nfs_clone_mount *data)
+{
+ struct super_block *sb;
+
+ sb = sget(&nfs_fs_type, nfs_compare_super, nfs_set_super, server);
+ if (!IS_ERR(sb) && sb->s_root == NULL && !(server->flags & NFS_MOUNT_NONLM))
+ lockd_up();
+ return sb;
+}
+
+static struct super_block *nfs_clone_nfs_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *raw_data)
+{
+ struct nfs_clone_mount *data = raw_data;
+ return nfs_clone_generic_sb(data, nfs_clone_client);
+}
+
+static struct file_system_type clone_nfs_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "nfs",
+ .get_sb = nfs_clone_nfs_sb,
+ .kill_sb = nfs_kill_super,
+ .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
+};
+
#ifdef CONFIG_NFS_V4
static void nfs4_clear_inode(struct inode *);
.alloc_inode = nfs_alloc_inode,
.destroy_inode = nfs_destroy_inode,
.write_inode = nfs_write_inode,
- .delete_inode = nfs_delete_inode,
.statfs = nfs_statfs,
.clear_inode = nfs4_clear_inode,
.umount_begin = nfs_umount_begin,
nfs_free_iostats(server->io_stats);
kfree(server->hostname);
kfree(server);
+ nfs_release_automount_timer();
}
static struct file_system_type nfs4_fs_type = {
module_param_call(idmap_cache_timeout, param_set_idmap_timeout, param_get_int,
&nfs_idmap_cache_timeout, 0644);
+/* Constructs the SERVER-side path */
+static inline char *nfs4_path(const struct dentry *dentry, char *buffer, ssize_t buflen)
+{
+ return nfs_path(NFS_SB(dentry->d_sb)->mnt_path, dentry, buffer, buflen);
+}
+
+static inline char *nfs4_dup_path(const struct dentry *dentry)
+{
+ char *page = (char *) __get_free_page(GFP_USER);
+ char *path;
+
+ path = nfs4_path(dentry, page, PAGE_SIZE);
+ if (!IS_ERR(path)) {
+ int len = PAGE_SIZE + page - path;
+ char *tmp = path;
+
+ path = kmalloc(len, GFP_KERNEL);
+ if (path)
+ memcpy(path, tmp, len);
+ else
+ path = ERR_PTR(-ENOMEM);
+ }
+ free_page((unsigned long)page);
+ return path;
+}
+
+static struct super_block *nfs4_clone_client(struct nfs_server *server, struct nfs_clone_mount *data)
+{
+ const struct dentry *dentry = data->dentry;
+ struct nfs4_client *clp = server->nfs4_state;
+ struct super_block *sb;
+
+ server->mnt_path = nfs4_dup_path(dentry);
+ if (IS_ERR(server->mnt_path)) {
+ sb = (struct super_block *)server->mnt_path;
+ goto err;
+ }
+ sb = sget(&nfs4_fs_type, nfs4_compare_super, nfs_set_super, server);
+ if (IS_ERR(sb) || sb->s_root)
+ goto free_path;
+ nfs4_server_capabilities(server, &server->fh);
+
+ down_write(&clp->cl_sem);
+ atomic_inc(&clp->cl_count);
+ list_add_tail(&server->nfs4_siblings, &clp->cl_superblocks);
+ up_write(&clp->cl_sem);
+ return sb;
+free_path:
+ kfree(server->mnt_path);
+err:
+ server->mnt_path = NULL;
+ return sb;
+}
+
+static struct super_block *nfs_clone_nfs4_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *raw_data)
+{
+ struct nfs_clone_mount *data = raw_data;
+ return nfs_clone_generic_sb(data, nfs4_clone_client);
+}
+
+static struct file_system_type clone_nfs4_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "nfs",
+ .get_sb = nfs_clone_nfs4_sb,
+ .kill_sb = nfs4_kill_super,
+ .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
+};
+
#define nfs4_init_once(nfsi) \
do { \
INIT_LIST_HEAD(&(nfsi)->open_states); \
nfs_unregister_sysctl();
}
#else
+#define nfs4_clone_client(a,b) ERR_PTR(-EINVAL)
#define nfs4_init_once(nfsi) \
do { } while (0)
#define register_nfs4fs() (0)
#define unregister_nfs4fs()
#endif
+static inline char *nfs_devname(const struct vfsmount *mnt_parent,
+ const struct dentry *dentry,
+ char *buffer, ssize_t buflen)
+{
+ return nfs_path(mnt_parent->mnt_devname, dentry, buffer, buflen);
+}
+
+/**
+ * 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
+ *
+ */
+struct vfsmount *nfs_do_submount(const struct vfsmount *mnt_parent,
+ const struct dentry *dentry, struct nfs_fh *fh,
+ struct nfs_fattr *fattr)
+{
+ struct nfs_clone_mount mountdata = {
+ .sb = mnt_parent->mnt_sb,
+ .dentry = dentry,
+ .fh = fh,
+ .fattr = fattr,
+ };
+ struct vfsmount *mnt = ERR_PTR(-ENOMEM);
+ char *page = (char *) __get_free_page(GFP_USER);
+ char *devname;
+
+ dprintk("%s: submounting on %s/%s\n", __FUNCTION__,
+ dentry->d_parent->d_name.name,
+ dentry->d_name.name);
+ if (page == NULL)
+ goto out;
+ devname = nfs_devname(mnt_parent, dentry, page, PAGE_SIZE);
+ mnt = (struct vfsmount *)devname;
+ if (IS_ERR(devname))
+ goto free_page;
+ switch (NFS_SB(mnt_parent->mnt_sb)->rpc_ops->version) {
+ case 2:
+ case 3:
+ mnt = vfs_kern_mount(&clone_nfs_fs_type, 0, devname, &mountdata);
+ break;
+ case 4:
+ mnt = vfs_kern_mount(&clone_nfs4_fs_type, 0, devname, &mountdata);
+ break;
+ default:
+ BUG();
+ }
+free_page:
+ free_page((unsigned long)page);
+out:
+ dprintk("%s: done\n", __FUNCTION__);
+ return mnt;
+}
+
extern int nfs_init_nfspagecache(void);
extern void nfs_destroy_nfspagecache(void);
extern int nfs_init_readpagecache(void);
projects / deliverable / linux.git / blobdiff