vfs: make llistxattr retry once on ESTALE error
authorJeff Layton <jlayton@redhat.com>
Tue, 11 Dec 2012 17:10:17 +0000 (12:10 -0500)
committerAl Viro <viro@zeniv.linux.org.uk>
Thu, 20 Dec 2012 23:50:10 +0000 (18:50 -0500)
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
fs/xattr.c

index 1dc1eac..49d09e1 100644 (file)
@@ -595,12 +595,17 @@ SYSCALL_DEFINE3(llistxattr, const char __user *, pathname, char __user *, list,
 {
        struct path path;
        ssize_t 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 = listxattr(path.dentry, list, size);
        path_put(&path);
+       if (retry_estale(error, lookup_flags)) {
+               lookup_flags |= LOOKUP_REVAL;
+               goto retry;
+       }
        return error;
 }