vfs: make lremovexattr retry once on ESTALE error

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 4caa8efeada3..3377dff18404 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -668,8 +668,9 @@ SYSCALL_DEFINE2(lremovexattr, const char __user *, pathname,
 {
         struct path path;
         int error;
-
-        error = user_lpath(pathname, &path);
+        unsigned int lookup_flags = 0;
+retry:
+        error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path);
         if (error)
                 return error;
         error = mnt_want_write(path.mnt);
@@ -678,6 +679,10 @@ SYSCALL_DEFINE2(lremovexattr, 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;
 }