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| author | Al Viro <viro@zeniv.linux.org.uk> | 2015-05-08 17:43:53 +0200 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2015-05-11 14:13:14 +0200 |
| commit | 294d71ff2f020aa2ef7057a7bd10cf2ec71b5ee3 (patch) | |
| tree | b5fe63b7b42ea32ba0d05eca331548e623f66a97 /fs/mount.h | |
| parent | namei: make may_follow_link() safe in RCU mode (diff) | |
| download | linux-294d71ff2f020aa2ef7057a7bd10cf2ec71b5ee3.tar.xz linux-294d71ff2f020aa2ef7057a7bd10cf2ec71b5ee3.zip | |
new helper: __legitimize_mnt()
same as legitimize_mnt(), except that it does *not* drop and regain
rcu_read_lock; return values are
0 => grabbed a reference, we are fine
1 => failed, just go away
-1 => failed, go away and mntput(bastard) when outside of rcu_read_lock
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/mount.h')
| -rw-r--r-- | fs/mount.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/mount.h b/fs/mount.h index 6a61c2b3e385..b5b8082bfa42 100644 --- a/fs/mount.h +++ b/fs/mount.h @@ -88,6 +88,7 @@ static inline int is_mounted(struct vfsmount *mnt) extern struct mount *__lookup_mnt(struct vfsmount *, struct dentry *); extern struct mount *__lookup_mnt_last(struct vfsmount *, struct dentry *); +extern int __legitimize_mnt(struct vfsmount *, unsigned); extern bool legitimize_mnt(struct vfsmount *, unsigned); extern void __detach_mounts(struct dentry *dentry); |