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| author | David Howells <dhowells@redhat.com> | 2012-06-25 12:55:28 +0100 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-07-14 16:38:32 +0400 |
| commit | f015f1267b23d3530d3f874243fb83cb5f443005 (patch) | |
| tree | 14db3794b2716614ee8acfaaad011d6fe7e6db44 /fs/namei.c | |
| parent | be34d1a3bc4b6f357a49acb55ae870c81337e4f0 (diff) | |
| download | linux-3.10-f015f1267b23d3530d3f874243fb83cb5f443005.tar.gz linux-3.10-f015f1267b23d3530d3f874243fb83cb5f443005.tar.bz2 linux-3.10-f015f1267b23d3530d3f874243fb83cb5f443005.zip | |
VFS: Comment mount following code
Add comments describing what the directions "up" and "down" mean and ref count
handling to the VFS mount following family of functions.
Signed-off-by: Valerie Aurora <vaurora@redhat.com> (Original author)
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/namei.c')
| -rw-r--r-- | fs/namei.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/namei.c b/fs/namei.c index 0e1b9c3eb36..c6dcb4c8f86 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -672,6 +672,16 @@ static int follow_up_rcu(struct path *path) return 1; } +/* + * follow_up - Find the mountpoint of path's vfsmount + * + * Given a path, find the mountpoint of its source file system. + * Replace @path with the path of the mountpoint in the parent mount. + * Up is towards /. + * + * Return 1 if we went up a level and 0 if we were already at the + * root. + */ int follow_up(struct path *path) { struct mount *mnt = real_mount(path->mnt); |