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authorAl Viro <viro@zeniv.linux.org.uk>2009-04-07 20:21:18 +0400
committerAl Viro <viro@zeniv.linux.org.uk>2009-06-12 05:35:59 +0400
commitdd5cae6e9772ecc62fd374f7a8ec10eb51c96c4d (patch)
tree48cfed52f4cc4fc9e2d91b1c8646f438f2f0e110
parent5b857119538daac7118c1364d7ff3613f12b84d3 (diff)
downloadlinux-dd5cae6e9772ecc62fd374f7a8ec10eb51c96c4d.tar.xz
Don't bother with check_mnt() in do_add_mount() on shrinkable ones
These guys are what we add as submounts; checks for "is that attached in our namespace" are simply irrelevant for those and counterproductive for use of private vfsmount trees a-la what NFS folks want. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r--fs/namespace.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/namespace.c b/fs/namespace.c
index 134d494158d9..88a904d5aa23 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1698,7 +1698,7 @@ int do_add_mount(struct vfsmount *newmnt, struct path *path,
follow_down(&path->mnt, &path->dentry))
;
err = -EINVAL;
- if (!check_mnt(path->mnt))
+ if (!(mnt_flags & MNT_SHRINKABLE) && !check_mnt(path->mnt))
goto unlock;
/* Refuse the same filesystem on the same mount point */