From patchwork Mon Feb 25 14:02:52 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wang Shilong X-Patchwork-Id: 2181101 Return-Path: X-Original-To: patchwork-linux-btrfs@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork1.kernel.org (Postfix) with ESMTP id E988B3FCA4 for ; Mon, 25 Feb 2013 14:03:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758825Ab3BYOC6 (ORCPT ); Mon, 25 Feb 2013 09:02:58 -0500 Received: from mail-pb0-f50.google.com ([209.85.160.50]:43280 "EHLO mail-pb0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758700Ab3BYOC5 (ORCPT ); Mon, 25 Feb 2013 09:02:57 -0500 Received: by mail-pb0-f50.google.com with SMTP id up1so1667570pbc.23 for ; Mon, 25 Feb 2013 06:02:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=x-received:from:to:cc:subject:date:message-id:x-mailer; bh=zdLV+vPBqXr8bUV6EFFDRn8ZOh+//ge7u/k1B2rHn1U=; b=JbVGwRD3wpYIo0lHBF4P3FMR32q6Pg2v2VRFdHPyoDOyABdeiy0N7qZyBz8TIXSPFR ktrHht9isJaQqRaD1PSZatsCUuSBnHn6zS+jOz6HZW8KlK6lsEpvof7bkSpEt7UdgfcF 37V6w6Uen2K9O2zyTWD1rMIfk73Z8q//sd1QAO45cgJa4dM4+4qyDYRYGQbhJWMzSvY5 BVHyzRnRbcgjD1pFg8v0ge0YG3jnb3C3yPegkTSN3HmyPaX2wDHopVZKwXiyZR9QdUIF kb5ePUEji1BWDfjv/6loNcdhkXRIVZ7oZyTeyBGAHyNFIF2+AviDMWGP9oU5Cd+mVG4C gJ1A== X-Received: by 10.66.182.226 with SMTP id eh2mr18838243pac.159.1361800976934; Mon, 25 Feb 2013 06:02:56 -0800 (PST) Received: from localhost.localdomain ([112.4.45.37]) by mx.google.com with ESMTPS id pg6sm12856387pbb.0.2013.02.25.06.02.55 (version=TLSv1 cipher=RC4-SHA bits=128/128); Mon, 25 Feb 2013 06:02:56 -0800 (PST) From: Wang Shilong To: linux-btrfs@vger.kernel.org Cc: wangshilong1991@gmail.com Subject: [PATCH 2/4] Btrfs-progs: disable qgroup level 0 for userspace use Date: Mon, 25 Feb 2013 22:02:52 +0800 Message-Id: <1361800972-1978-1-git-send-email-wangshilong1991@gmail.com> X-Mailer: git-send-email 1.7.11.7 Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org From: Wang Shilong To implement a strict hierarchy quota, qgroup level 0 should not be allowed to create/destroy by users. Signed-off-by: Wang Shilong --- cmds-qgroup.c | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-) diff --git a/cmds-qgroup.c b/cmds-qgroup.c index 26f0ab0..06505fa 100644 --- a/cmds-qgroup.c +++ b/cmds-qgroup.c @@ -86,6 +86,11 @@ static int qgroup_create(int create, int argc, char **argv) memset(&args, 0, sizeof(args)); args.create = create; args.qgroupid = parse_qgroupid(argv[1]); + if (!(args.qgroupid >> 48)) { + fprintf(stderr, "ERROR: unable to create/destroy qgroup " + "level 0\n"); + return 30; + } fd = open_file_or_dir(path); if (fd < 0) {