{ Opt_vers_err, NULL }
};
+struct nfs_mount_info {
+ void (*fill_super)(struct super_block *, struct nfs_mount_info *);
+ int (*set_security)(struct super_block *, struct dentry *, struct nfs_mount_info *);
+ struct nfs_parsed_mount_data *parsed;
+ struct nfs_clone_mount *cloned;
+};
+
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 dentry *);
* Finish setting up an NFS2/3 superblock
*/
static void nfs_fill_super(struct super_block *sb,
- struct nfs_parsed_mount_data *data)
+ struct nfs_mount_info *mount_info)
{
+ struct nfs_parsed_mount_data *data = mount_info->parsed;
struct nfs_server *server = NFS_SB(sb);
sb->s_blocksize_bits = 0;
* Finish setting up a cloned NFS2/3 superblock
*/
static void nfs_clone_super(struct super_block *sb,
- const struct super_block *old_sb)
+ struct nfs_mount_info *mount_info)
{
+ const struct super_block *old_sb = mount_info->cloned->sb;
struct nfs_server *server = NFS_SB(sb);
sb->s_blocksize_bits = old_sb->s_blocksize_bits;
return bdi_register_dev(&server->backing_dev_info, server->s_dev);
}
-static struct dentry *nfs_fs_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data)
+static int nfs_set_sb_security(struct super_block *s, struct dentry *mntroot,
+ struct nfs_mount_info *mount_info)
+{
+ return security_sb_set_mnt_opts(s, &mount_info->parsed->lsm_opts);
+}
+
+static int nfs_clone_sb_security(struct super_block *s, struct dentry *mntroot,
+ struct nfs_mount_info *mount_info)
+{
+ /* clone any lsm security options from the parent to the new sb */
+ security_sb_clone_mnt_opts(mount_info->cloned->sb, s);
+ if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops)
+ return -ESTALE;
+ return 0;
+}
+
+static struct dentry *nfs_fs_mount_common(struct file_system_type *fs_type,
+ struct nfs_server *server,
+ int flags, const char *dev_name,
+ struct nfs_fh *mntfh,
+ struct nfs_mount_info *mount_info)
{
- struct nfs_server *server = NULL;
struct super_block *s;
- struct nfs_parsed_mount_data *data;
- struct nfs_fh *mntfh;
struct dentry *mntroot = ERR_PTR(-ENOMEM);
int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
struct nfs_sb_mountdata sb_mntdata = {
.mntflags = flags,
+ .server = server,
};
int error;
- data = nfs_alloc_parsed_mount_data(NFS_DEFAULT_VERSION);
- mntfh = nfs_alloc_fhandle();
- if (data == NULL || mntfh == NULL)
- goto out;
-
- /* Validate the mount data */
- error = nfs_validate_mount_data(raw_data, data, mntfh, dev_name);
- if (error < 0) {
- mntroot = ERR_PTR(error);
- goto out;
- }
-
-#ifdef CONFIG_NFS_V4
- if (data->version == 4) {
- mntroot = nfs4_try_mount(flags, dev_name, data);
- goto out;
- }
-#endif /* CONFIG_NFS_V4 */
-
- /* Get a volume representation */
- server = nfs_create_server(data, mntfh);
- if (IS_ERR(server)) {
- mntroot = ERR_CAST(server);
- goto out;
- }
- sb_mntdata.server = server;
-
if (server->flags & NFS_MOUNT_UNSHARED)
compare_super = NULL;
if (!s->s_root) {
/* initial superblock/root creation */
- nfs_fill_super(s, data);
- nfs_get_cache_cookie(s, data, NULL);
+ mount_info->fill_super(s, mount_info);
+ nfs_get_cache_cookie(s, mount_info->parsed, mount_info->cloned);
}
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);
+ error = mount_info->set_security(s, mntroot, mount_info);
if (error)
goto error_splat_root;
s->s_flags |= MS_ACTIVE;
out:
- nfs_free_parsed_mount_data(data);
- nfs_free_fhandle(mntfh);
return mntroot;
out_err_nosb:
goto out;
}
+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;
+ struct nfs_parsed_mount_data *data = NULL;
+ struct nfs_mount_info mount_info = {
+ .fill_super = nfs_fill_super,
+ .set_security = nfs_set_sb_security,
+ };
+ struct nfs_fh *mntfh;
+ struct dentry *mntroot = ERR_PTR(-ENOMEM);
+ int error;
+
+ data = nfs_alloc_parsed_mount_data(NFS_DEFAULT_VERSION);
+ mntfh = nfs_alloc_fhandle();
+ if (data == NULL || mntfh == NULL)
+ goto out;
+
+ /* Validate the mount data */
+ error = nfs_validate_mount_data(raw_data, data, mntfh, dev_name);
+ if (error < 0) {
+ mntroot = ERR_PTR(error);
+ goto out;
+ }
+ mount_info.parsed = data;
+
+#ifdef CONFIG_NFS_V4
+ if (data->version == 4) {
+ mntroot = nfs4_try_mount(flags, dev_name, data);
+ goto out;
+ }
+#endif /* CONFIG_NFS_V4 */
+
+ /* Get a volume representation */
+ server = nfs_create_server(data, mntfh);
+ if (IS_ERR(server)) {
+ mntroot = ERR_CAST(server);
+ goto out;
+ }
+
+ mntroot = nfs_fs_mount_common(fs_type, server, flags, dev_name, mntfh, &mount_info);
+out:
+ nfs_free_parsed_mount_data(data);
+ nfs_free_fhandle(mntfh);
+ return mntroot;
+}
+
/*
* Ensure that we unregister the bdi before kill_anon_super
* releases the device name
}
/*
- * Clone an NFS2/3 server record on xdev traversal (FSID-change)
+ * Clone an NFS2/3/4 server record on xdev traversal (FSID-change)
*/
static struct dentry *
-nfs_xdev_mount(struct file_system_type *fs_type, int flags,
- const char *dev_name, void *raw_data)
+nfs_xdev_mount_common(struct file_system_type *fs_type, int flags,
+ const char *dev_name, struct nfs_mount_info *mount_info)
{
- struct nfs_clone_mount *data = raw_data;
- struct super_block *s;
+ struct nfs_clone_mount *data = mount_info->cloned;
struct nfs_server *server;
- struct dentry *mntroot;
- int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
- struct nfs_sb_mountdata sb_mntdata = {
- .mntflags = flags,
- };
+ struct dentry *mntroot = ERR_PTR(-ENOMEM);
int error;
- dprintk("--> nfs_xdev_mount()\n");
+ dprintk("--> nfs_xdev_mount_common()\n");
/* create a new volume representation */
server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr, data->authflavor);
if (IS_ERR(server)) {
error = PTR_ERR(server);
- goto out_err_noserver;
- }
- sb_mntdata.server = server;
-
- if (server->flags & NFS_MOUNT_UNSHARED)
- compare_super = NULL;
-
- /* -o noac implies -o sync */
- if (server->flags & NFS_MOUNT_NOAC)
- sb_mntdata.mntflags |= MS_SYNCHRONOUS;
-
- /* Get a superblock - note that we may end up sharing one that already exists */
- s = sget(&nfs_fs_type, compare_super, nfs_set_super, &sb_mntdata);
- if (IS_ERR(s)) {
- error = PTR_ERR(s);
- goto out_err_nosb;
- }
-
- if (s->s_fs_info != server) {
- nfs_free_server(server);
- server = NULL;
- } else {
- error = nfs_bdi_register(server);
- if (error)
- goto error_splat_bdi;
- }
-
- if (!s->s_root) {
- /* initial superblock/root creation */
- nfs_clone_super(s, data->sb);
- nfs_get_cache_cookie(s, NULL, data);
- }
-
- mntroot = nfs_get_root(s, data->fh, dev_name);
- if (IS_ERR(mntroot)) {
- error = PTR_ERR(mntroot);
- goto error_splat_super;
- }
- if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) {
- dput(mntroot);
- error = -ESTALE;
- goto error_splat_super;
+ goto out_err;
}
- s->s_flags |= MS_ACTIVE;
-
- /* clone any lsm security options from the parent to the new sb */
- security_sb_clone_mnt_opts(data->sb, s);
-
- dprintk("<-- nfs_xdev_mount() = 0\n");
+ mntroot = nfs_fs_mount_common(fs_type, server, flags, dev_name, data->fh, mount_info);
+ dprintk("<-- nfs_xdev_mount_common() = 0\n");
+out:
return mntroot;
-out_err_nosb:
- nfs_free_server(server);
-out_err_noserver:
- dprintk("<-- nfs_xdev_mount() = %d [error]\n", error);
- return ERR_PTR(error);
+out_err:
+ dprintk("<-- nfs_xdev_mount_common() = %d [error]\n", error);
+ goto out;
+}
-error_splat_super:
- if (server && !s->s_root)
- bdi_unregister(&server->backing_dev_info);
-error_splat_bdi:
- deactivate_locked_super(s);
- dprintk("<-- nfs_xdev_mount() = %d [splat]\n", error);
- return ERR_PTR(error);
+/*
+ * Clone an NFS2/3 server record on xdev traversal (FSID-change)
+ */
+static struct dentry *
+nfs_xdev_mount(struct file_system_type *fs_type, int flags,
+ const char *dev_name, void *raw_data)
+{
+ struct nfs_mount_info mount_info = {
+ .fill_super = nfs_clone_super,
+ .set_security = nfs_clone_sb_security,
+ .cloned = raw_data,
+ };
+ return nfs_xdev_mount_common(&nfs_fs_type, flags, dev_name, &mount_info);
}
#ifdef CONFIG_NFS_V4
* Finish setting up a cloned NFS4 superblock
*/
static void nfs4_clone_super(struct super_block *sb,
- const struct super_block *old_sb)
+ struct nfs_mount_info *mount_info)
{
+ const struct super_block *old_sb = mount_info->cloned->sb;
sb->s_blocksize_bits = old_sb->s_blocksize_bits;
sb->s_blocksize = old_sb->s_blocksize;
sb->s_maxbytes = old_sb->s_maxbytes;
/*
* Set up an NFS4 superblock
*/
-static void nfs4_fill_super(struct super_block *sb)
+static void nfs4_fill_super(struct super_block *sb,
+ struct nfs_mount_info *mount_info)
{
sb->s_time_gran = 1;
sb->s_op = &nfs4_sops;
nfs4_remote_mount(struct file_system_type *fs_type, int flags,
const char *dev_name, void *raw_data)
{
- struct nfs_parsed_mount_data *data = raw_data;
- struct super_block *s;
+ struct nfs_mount_info mount_info = {
+ .fill_super = nfs4_fill_super,
+ .set_security = nfs_set_sb_security,
+ .parsed = raw_data,
+ };
struct nfs_server *server;
struct nfs_fh *mntfh;
- struct dentry *mntroot;
- int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
- struct nfs_sb_mountdata sb_mntdata = {
- .mntflags = flags,
- };
- int error = -ENOMEM;
+ struct dentry *mntroot = ERR_PTR(-ENOMEM);
mntfh = nfs_alloc_fhandle();
- if (data == NULL || mntfh == NULL)
+ if (mount_info.parsed == NULL || mntfh == NULL)
goto out;
/* Get a volume representation */
- server = nfs4_create_server(data, mntfh);
+ server = nfs4_create_server(mount_info.parsed, mntfh);
if (IS_ERR(server)) {
- error = PTR_ERR(server);
+ mntroot = ERR_CAST(server);
goto out;
}
- sb_mntdata.server = server;
- if (server->flags & NFS_MOUNT_UNSHARED)
- compare_super = NULL;
-
- /* -o noac implies -o sync */
- if (server->flags & NFS_MOUNT_NOAC)
- sb_mntdata.mntflags |= MS_SYNCHRONOUS;
-
- /* Get a superblock - note that we may end up sharing one that already exists */
- s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata);
- if (IS_ERR(s)) {
- error = PTR_ERR(s);
- goto out_free;
- }
-
- if (s->s_fs_info != server) {
- nfs_free_server(server);
- server = NULL;
- } else {
- error = nfs_bdi_register(server);
- if (error)
- goto error_splat_bdi;
- }
-
- if (!s->s_root) {
- /* initial superblock/root creation */
- nfs4_fill_super(s);
- nfs_get_cache_cookie(s, data, NULL);
- }
-
- mntroot = nfs_get_root(s, mntfh, dev_name);
- if (IS_ERR(mntroot)) {
- error = PTR_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;
-
- nfs_free_fhandle(mntfh);
- return mntroot;
+ mntroot = nfs_fs_mount_common(fs_type, server, flags,
+ dev_name, mntfh, &mount_info);
out:
nfs_free_fhandle(mntfh);
- return ERR_PTR(error);
-
-out_free:
- nfs_free_server(server);
- goto out;
-
-error_splat_root:
- dput(mntroot);
-error_splat_super:
- if (server && !s->s_root)
- bdi_unregister(&server->backing_dev_info);
-error_splat_bdi:
- deactivate_locked_super(s);
- goto out;
+ return mntroot;
}
static struct vfsmount *nfs_do_root_mount(struct file_system_type *fs_type,
nfs4_xdev_mount(struct file_system_type *fs_type, int flags,
const char *dev_name, void *raw_data)
{
- struct nfs_clone_mount *data = raw_data;
- struct super_block *s;
- struct nfs_server *server;
- struct dentry *mntroot;
- int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
- struct nfs_sb_mountdata sb_mntdata = {
- .mntflags = flags,
+ struct nfs_mount_info mount_info = {
+ .fill_super = nfs4_clone_super,
+ .set_security = nfs_clone_sb_security,
+ .cloned = raw_data,
};
- int error;
-
- dprintk("--> nfs4_xdev_mount()\n");
-
- /* create a new volume representation */
- server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr, data->authflavor);
- if (IS_ERR(server)) {
- error = PTR_ERR(server);
- goto out_err_noserver;
- }
- sb_mntdata.server = server;
-
- if (server->flags & NFS_MOUNT_UNSHARED)
- compare_super = NULL;
-
- /* -o noac implies -o sync */
- if (server->flags & NFS_MOUNT_NOAC)
- sb_mntdata.mntflags |= MS_SYNCHRONOUS;
-
- /* Get a superblock - note that we may end up sharing one that already exists */
- s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata);
- if (IS_ERR(s)) {
- error = PTR_ERR(s);
- goto out_err_nosb;
- }
-
- if (s->s_fs_info != server) {
- nfs_free_server(server);
- server = NULL;
- } else {
- error = nfs_bdi_register(server);
- if (error)
- goto error_splat_bdi;
- }
-
- if (!s->s_root) {
- /* initial superblock/root creation */
- nfs4_clone_super(s, data->sb);
- nfs_get_cache_cookie(s, NULL, data);
- }
-
- mntroot = nfs_get_root(s, data->fh, dev_name);
- if (IS_ERR(mntroot)) {
- error = PTR_ERR(mntroot);
- goto error_splat_super;
- }
- if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) {
- dput(mntroot);
- error = -ESTALE;
- goto error_splat_super;
- }
-
- s->s_flags |= MS_ACTIVE;
-
- security_sb_clone_mnt_opts(data->sb, s);
-
- dprintk("<-- nfs4_xdev_mount() = 0\n");
- return mntroot;
-
-out_err_nosb:
- nfs_free_server(server);
-out_err_noserver:
- dprintk("<-- nfs4_xdev_mount() = %d [error]\n", error);
- return ERR_PTR(error);
-
-error_splat_super:
- if (server && !s->s_root)
- bdi_unregister(&server->backing_dev_info);
-error_splat_bdi:
- deactivate_locked_super(s);
- dprintk("<-- nfs4_xdev_mount() = %d [splat]\n", error);
- return ERR_PTR(error);
+ return nfs_xdev_mount_common(&nfs4_fs_type, flags, dev_name, &mount_info);
}
static struct dentry *
if (!s->s_root) {
/* initial superblock/root creation */
- nfs4_fill_super(s);
+ nfs4_fill_super(s, NULL);
nfs_get_cache_cookie(s, NULL, data);
}
projects / firefly-linux-kernel-4.4.55.git / blobdiff