path: root/fs/autofs4/expire.c
diff options
authorIan Kent <raven@themaw.net>2012-08-17 11:09:04 +0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-08-17 06:56:39 -0700
commitd807ff838f48e7778996e577e2a57a5796c32e84 (patch)
treecb1ced2dff92e1b973ff171e120ebaa7493b924f /fs/autofs4/expire.c
parentLinux 3.6-rc2 (diff)
autofs4 - fix expire check
In some cases when an autofs indirect mount is contained in a file system that is marked as shared (such as when systemd does the equivalent of "mount --make-rshared /" early in the boot), mounts stop expiring. When this happens the first expiry check on a mountpoint dentry in autofs_expire_indirect() sees a mountpoint dentry with a higher than minimal reference count. Consequently the dentry is condidered busy and the actual expiry check is never done. This particular check was originally meant as an optimisation to detect a path walk in progress but with the addition of rcu-walk it can be ineffective anyway. Removing the test allows automounts to expire again since the actual expire check doesn't rely on the dentry reference count. Signed-off-by: Ian Kent <raven@themaw.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/autofs4/expire.c')
1 files changed, 0 insertions, 5 deletions
diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c
index 8c0e56d92938..842d00048a65 100644
--- a/fs/autofs4/expire.c
+++ b/fs/autofs4/expire.c
@@ -399,11 +399,6 @@ struct dentry *autofs4_expire_indirect(struct super_block *sb,
DPRINTK("checking mountpoint %p %.*s",
dentry, (int)dentry->d_name.len, dentry->d_name.name);
- /* Path walk currently on this dentry? */
- ino_count = atomic_read(&ino->count) + 2;
- if (dentry->d_count > ino_count)
- goto next;
/* Can we umount this guy */
if (autofs4_mount_busy(mnt, dentry))
goto next;