vfs: make getxattr retry once on an ESTALE error
authorJeff Layton <jlayton@redhat.com>
Tue, 11 Dec 2012 17:10:16 +0000 (12:10 -0500)
committerAl Viro <viro@zeniv.linux.org.uk>
Thu, 20 Dec 2012 23:50:09 +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 74d36e063c8d163b53b988be712e71f5e775805d..24833de649f87d1a6646f981321070819e7bc0d3 100644 (file)
@@ -486,12 +486,17 @@ SYSCALL_DEFINE4(getxattr, const char __user *, pathname,
 {
        struct path path;
        ssize_t 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 = getxattr(path.dentry, name, value, size);
        path_put(&path);
+       if (retry_estale(error, lookup_flags)) {
+               lookup_flags |= LOOKUP_REVAL;
+               goto retry;
+       }
        return error;
 }