vfs: make do_rmdir retry once on ESTALE errors

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 7 insertions, 2 deletions

diff --git a/fs/namei.c b/fs/namei.c
index 19190618695f..fe06a2fd1925 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -3339,8 +3339,9 @@ static long do_rmdir(int dfd, const char __user *pathname)
         struct filename *name;
         struct dentry *dentry;
         struct nameidata nd;
-
-        name = user_path_parent(dfd, pathname, &nd, 0);
+        unsigned int lookup_flags = 0;
+retry:
+        name = user_path_parent(dfd, pathname, &nd, lookup_flags);
         if (IS_ERR(name))
                 return PTR_ERR(name);
 
@@ -3382,6 +3383,10 @@ exit2:
 exit1:
         path_put(&nd.path);
         putname(name);
+        if (retry_estale(error, lookup_flags)) {
+                lookup_flags |= LOOKUP_REVAL;
+                goto retry;
+        }
         return error;
 }