fuse: drop dentry on failed revalidate

Drop a subtree when we find that it has moved or been delated.  This can be
done as long as there are no submounts under this location.

If the directory was moved and we come across the same directory in a
future lookup it will be reconnected by d_materialise_unique().

Signed-off-by: Anand Avati <avati@redhat.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 25c6cfe988010cae09a7832545a0441ba5ea92c8..0e6961aae6c02e04414e432abb8b62826907bfbf 100644 (file)
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -259,6 +259,8 @@ out:
 
 invalid:
        ret = 0;
+       if (check_submounts_and_drop(entry) != 0)
+               ret = 1;
        goto out;
 }