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convenience helper: get_tree_single()

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counterpart of mount_single(); switch fusectl to it

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2019-05-22 21:23:39 -04:00
parent 2ac295d4f0
commit c23a0bbab3
3 changed files with 12 additions and 1 deletions
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2
fs/fuse/control.c
View File

@ -346,7 +346,7 @@ static int fuse_ctl_fill_super(struct super_block *sb, struct fs_context *fctx)
static int fuse_ctl_get_tree(struct fs_context *fc)
{
return vfs_get_super(fc, vfs_get_single_super, fuse_ctl_fill_super);
return get_tree_single(fc, fuse_ctl_fill_super);
}
static const struct fs_context_operations fuse_ctl_context_ops = {

8
fs/super.c
View File

@ -1206,6 +1206,14 @@ int get_tree_nodev(struct fs_context *fc,
}
EXPORT_SYMBOL(get_tree_nodev);
int get_tree_single(struct fs_context *fc,
int (*fill_super)(struct super_block *sb,
struct fs_context *fc))
{
return vfs_get_super(fc, vfs_get_single_super, fill_super);
}
EXPORT_SYMBOL(get_tree_single);
#ifdef CONFIG_BLOCK
static int set_bdev_super(struct super_block *s, void *data)
{

3
include/linux/fs_context.h
View File

@ -154,6 +154,9 @@ extern int vfs_get_super(struct fs_context *fc,
extern int get_tree_nodev(struct fs_context *fc,
int (*fill_super)(struct super_block *sb,
struct fs_context *fc));
extern int get_tree_single(struct fs_context *fc,
int (*fill_super)(struct super_block *sb,
struct fs_context *fc));
extern const struct file_operations fscontext_fops;