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| author | Al Viro <viro@zeniv.linux.org.uk> | 2011-11-16 21:43:59 -0500 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2011-11-16 22:00:34 -0500 |
| commit | ea441d1104cf1efb471fa81bc91e9fd1e6ae29fd (patch) | |
| tree | 32b7c4f7c78af47936a604e3f4e13e8e61f834a0 /include | |
| parent | c13344958780b4046305ee6235d686c846535529 (diff) | |
| download | linux-3.10-ea441d1104cf1efb471fa81bc91e9fd1e6ae29fd.tar.gz linux-3.10-ea441d1104cf1efb471fa81bc91e9fd1e6ae29fd.tar.bz2 linux-3.10-ea441d1104cf1efb471fa81bc91e9fd1e6ae29fd.zip | |
new helper: mount_subtree()
takes vfsmount and relative path, does lookup within that vfsmount
(possibly triggering automounts) and returns the result as root
of subtree suitable for return by ->mount() (i.e. a reference to
dentry and an active reference to its superblock grabbed, superblock
locked exclusive).
btrfs and nfs switched to it instead of open-coding the sucker.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/fs.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index 0c4df261af7..e3130220ce3 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1886,6 +1886,7 @@ extern struct dentry *mount_single(struct file_system_type *fs_type, extern struct dentry *mount_nodev(struct file_system_type *fs_type, int flags, void *data, int (*fill_super)(struct super_block *, void *, int)); +extern struct dentry *mount_subtree(struct vfsmount *mnt, const char *path); void generic_shutdown_super(struct super_block *sb); void kill_block_super(struct super_block *sb); void kill_anon_super(struct super_block *sb); |