diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/nfs/super.c | 122 |
1 files changed, 32 insertions, 90 deletions
diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 64a62da6612..707d1f67fb3 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -280,6 +280,7 @@ static match_table_t nfs_vers_tokens = { struct nfs_mount_info { void (*fill_super)(struct super_block *, struct nfs_mount_info *); struct nfs_parsed_mount_data *parsed; + struct nfs_clone_mount *cloned; }; static void nfs_umount_begin(struct super_block *); @@ -2160,8 +2161,9 @@ static void nfs_fill_super(struct super_block *sb, * 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; @@ -2454,13 +2456,13 @@ static void nfs_kill_super(struct super_block *s) } /* - * 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 nfs_clone_mount *data = mount_info->cloned; struct super_block *s; struct nfs_server *server; struct dentry *mntroot; @@ -2470,7 +2472,7 @@ nfs_xdev_mount(struct file_system_type *fs_type, int flags, }; 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); @@ -2505,7 +2507,7 @@ nfs_xdev_mount(struct file_system_type *fs_type, int flags, if (!s->s_root) { /* initial superblock/root creation */ - nfs_clone_super(s, data->sb); + mount_info->fill_super(s, mount_info); nfs_get_cache_cookie(s, NULL, data); } @@ -2525,13 +2527,13 @@ nfs_xdev_mount(struct file_system_type *fs_type, int flags, /* 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"); + dprintk("<-- nfs_xdev_mount_common() = 0\n"); return mntroot; out_err_nosb: nfs_free_server(server); out_err_noserver: - dprintk("<-- nfs_xdev_mount() = %d [error]\n", error); + dprintk("<-- nfs_xdev_mount_common() = %d [error]\n", error); return ERR_PTR(error); error_splat_super: @@ -2539,18 +2541,33 @@ error_splat_super: bdi_unregister(&server->backing_dev_info); error_splat_bdi: deactivate_locked_super(s); - dprintk("<-- nfs_xdev_mount() = %d [splat]\n", error); + dprintk("<-- nfs_xdev_mount_common() = %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, + .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; @@ -2930,86 +2947,11 @@ static struct dentry * 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, + .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 * |