diff options
| -rw-r--r-- | fs/super.c | 19 | ||||
| -rw-r--r-- | include/linux/fs_context.h | 4 |
2 files changed, 19 insertions, 4 deletions
diff --git a/fs/super.c b/fs/super.c index 1d5ccf540a9b..a1dc4de1b657 100644 --- a/fs/super.c +++ b/fs/super.c @@ -1374,7 +1374,17 @@ static int test_single_super(struct super_block *s, struct fs_context *fc) return 1; } -static int vfs_get_super(struct fs_context *fc, +/** + * get_tree_super - Get a superblock, optionally sharing an existing one + * @fc: The filesystem context holding the parameters + * @test: Comparison function to find a matching existing superblock, or NULL + * @fill_super: Helper to initialise a new superblock + * + * If @test is non-NULL and matches an existing superblock, that superblock is + * reused; otherwise a new anonymous superblock is created and initialised with + * @fill_super. Passing NULL for @test always creates a new superblock. + */ +int get_tree_super(struct fs_context *fc, int (*test)(struct super_block *, struct fs_context *), int (*fill_super)(struct super_block *sb, struct fs_context *fc)) @@ -1401,12 +1411,13 @@ error: deactivate_locked_super(sb); return err; } +EXPORT_SYMBOL_GPL(get_tree_super); int get_tree_nodev(struct fs_context *fc, int (*fill_super)(struct super_block *sb, struct fs_context *fc)) { - return vfs_get_super(fc, NULL, fill_super); + return get_tree_super(fc, NULL, fill_super); } EXPORT_SYMBOL(get_tree_nodev); @@ -1414,7 +1425,7 @@ int get_tree_single(struct fs_context *fc, int (*fill_super)(struct super_block *sb, struct fs_context *fc)) { - return vfs_get_super(fc, test_single_super, fill_super); + return get_tree_super(fc, test_single_super, fill_super); } EXPORT_SYMBOL(get_tree_single); @@ -1424,7 +1435,7 @@ int get_tree_keyed(struct fs_context *fc, void *key) { fc->s_fs_info = key; - return vfs_get_super(fc, test_keyed_super, fill_super); + return get_tree_super(fc, test_keyed_super, fill_super); } EXPORT_SYMBOL(get_tree_keyed); diff --git a/include/linux/fs_context.h b/include/linux/fs_context.h index 0d6c8a6d7be2..d1727dffecc5 100644 --- a/include/linux/fs_context.h +++ b/include/linux/fs_context.h @@ -150,6 +150,10 @@ extern int vfs_parse_fs_param_source(struct fs_context *fc, struct fs_parameter *param); extern void fc_drop_locked(struct fs_context *fc); +int get_tree_super(struct fs_context *fc, + int (*test)(struct super_block *, struct fs_context *), + int (*fill_super)(struct super_block *sb, + struct fs_context *fc)); extern int get_tree_nodev(struct fs_context *fc, int (*fill_super)(struct super_block *sb, struct fs_context *fc)); |