vfs: make removexattr retry once on ESTALE

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/xattr.c b/fs/xattr.c
index 49d09e158809..4caa8efeada3 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -645,8 +645,9 @@ SYSCALL_DEFINE2(removexattr, const char __user *, pathname,
 {
         struct path path;
         int error;
-
-        error = user_path(pathname, &path);
+        unsigned int lookup_flags = LOOKUP_FOLLOW;
+retry:
+        error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path);
         if (error)
                 return error;
         error = mnt_want_write(path.mnt);
@@ -655,6 +656,10 @@ SYSCALL_DEFINE2(removexattr, const char __user *, pathname,
                 mnt_drop_write(path.mnt);
         }
         path_put(&path);
+        if (retry_estale(error, lookup_flags)) {
+                lookup_flags |= LOOKUP_REVAL;
+                goto retry;
+        }
         return error;
 }