From patchwork Tue May 22 09:46:50 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gu Jinxiang X-Patchwork-Id: 10417767 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 18A70600CC for ; Tue, 22 May 2018 09:47:13 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 04BE128B92 for ; Tue, 22 May 2018 09:47:13 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id EB6FB28B96; Tue, 22 May 2018 09:47:12 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6649028B92 for ; Tue, 22 May 2018 09:47:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751326AbeEVJrJ (ORCPT ); Tue, 22 May 2018 05:47:09 -0400 Received: from mail.cn.fujitsu.com ([183.91.158.132]:29150 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751214AbeEVJrJ (ORCPT ); Tue, 22 May 2018 05:47:09 -0400 X-IronPort-AV: E=Sophos;i="5.43,368,1503331200"; d="scan'208";a="40206810" Received: from localhost (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 22 May 2018 17:47:08 +0800 Received: from G08CNEXCHPEKD01.g08.fujitsu.local (unknown [10.167.33.80]) by cn.fujitsu.com (Postfix) with ESMTP id C1E174B3EF2E; Tue, 22 May 2018 17:47:03 +0800 (CST) Received: from ubuntu.g08.fujitsu.local (10.167.226.132) by G08CNEXCHPEKD01.g08.fujitsu.local (10.167.33.89) with Microsoft SMTP Server (TLS) id 14.3.399.0; Tue, 22 May 2018 17:47:08 +0800 From: Gu Jinxiang To: CC: Subject: [PATCH 1/2] btrfs: handle failures of set_extent_bits in add_excluded_extent Date: Tue, 22 May 2018 17:46:50 +0800 Message-ID: <1526982411-9243-1-git-send-email-gujx@cn.fujitsu.com> X-Mailer: git-send-email 1.9.1 MIME-Version: 1.0 X-Originating-IP: [10.167.226.132] X-yoursite-MailScanner-ID: C1E174B3EF2E.A9C36 X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: gujx@cn.fujitsu.com Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP set_extent_bits may return 0/-EEXIST, so return the result in add_excluded_extent. Signed-off-by: Gu Jinxiang Reviewed-by: Nikolay Borisov --- fs/btrfs/extent-tree.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 75cfb80d2551..2e85e99b5e6f 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -215,11 +215,16 @@ static int add_excluded_extent(struct btrfs_fs_info *fs_info, u64 start, u64 num_bytes) { u64 end = start + num_bytes - 1; - set_extent_bits(&fs_info->freed_extents[0], + int ret = 0; + + ret = set_extent_bits(&fs_info->freed_extents[0], start, end, EXTENT_UPTODATE); - set_extent_bits(&fs_info->freed_extents[1], + if (ret) + goto out; + ret = set_extent_bits(&fs_info->freed_extents[1], start, end, EXTENT_UPTODATE); - return 0; +out: + return ret; } static void free_excluded_extents(struct btrfs_fs_info *fs_info,