From patchwork Mon Jan 19 11:21:00 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhaolei X-Patchwork-Id: 5657681 Return-Path: X-Original-To: patchwork-linux-btrfs@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 2AD329F6B5 for ; Mon, 19 Jan 2015 11:24:02 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 4A83F201FA for ; Mon, 19 Jan 2015 11:24:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 23BF720361 for ; Mon, 19 Jan 2015 11:24:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751624AbbASLWi (ORCPT ); Mon, 19 Jan 2015 06:22:38 -0500 Received: from cn.fujitsu.com ([59.151.112.132]:59353 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1751605AbbASLWg (ORCPT ); Mon, 19 Jan 2015 06:22:36 -0500 X-IronPort-AV: E=Sophos;i="5.04,848,1406563200"; d="scan'208";a="56266555" Received: from unknown (HELO edo.cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 19 Jan 2015 19:19:05 +0800 Received: from G08CNEXCHPEKD03.g08.fujitsu.local (localhost.localdomain [127.0.0.1]) by edo.cn.fujitsu.com (8.14.3/8.13.1) with ESMTP id t0JBLuPr007828; Mon, 19 Jan 2015 19:21:56 +0800 Received: from localhost.localdomain (10.167.226.114) by G08CNEXCHPEKD03.g08.fujitsu.local (10.167.33.89) with Microsoft SMTP Server id 14.3.181.6; Mon, 19 Jan 2015 19:22:34 +0800 From: Zhaolei To: linux-btrfs CC: Zhao Lei , Miao Xie Subject: [PATCH 11/16] Btrfs: Separate finding-right-mirror and writing-to-target's process in scrub_handle_errored_block() Date: Mon, 19 Jan 2015 19:21:00 +0800 Message-ID: <1421666465-3892-12-git-send-email-zhaolei@cn.fujitsu.com> X-Mailer: git-send-email 1.8.5.1 In-Reply-To: <1421666465-3892-1-git-send-email-zhaolei@cn.fujitsu.com> References: <1421666465-3892-1-git-send-email-zhaolei@cn.fujitsu.com> MIME-Version: 1.0 Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Zhao Lei In corrent code, code of finding-right-mirror and writing-to-target are mixed in logic, if we find a right mirror but failed in writing to target, it will treat as "hadn't found right block", and fill the target with sblock_bad. Actually, "failed in writing to target" does not mean "source block is wrong", this patch separate above two condition in logic, and do some cleanup to make code clean. Signed-off-by: Zhao Lei Signed-off-by: Miao Xie --- fs/btrfs/scrub.c | 44 +++++++++++++++++--------------------------- 1 file changed, 17 insertions(+), 27 deletions(-) diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c index 6cf0dc7..285f8cf 100644 --- a/fs/btrfs/scrub.c +++ b/fs/btrfs/scrub.c @@ -1110,35 +1110,21 @@ nodatasum_case: success = 1; for (page_num = 0; page_num < sblock_bad->page_count; page_num++) { - int sub_success; + struct scrub_block *sblock_other = NULL; - sub_success = 0; for (mirror_index = 0; mirror_index < BTRFS_MAX_MIRRORS && sblocks_for_recheck[mirror_index].page_count > 0; mirror_index++) { - struct scrub_block *sblock_other = - sblocks_for_recheck + mirror_index; - struct scrub_page *page_other = - sblock_other->pagev[page_num]; - - if (!page_other->io_error) { - ret = scrub_write_page_to_dev_replace( - sblock_other, page_num); - if (ret == 0) { - /* succeeded for this page */ - sub_success = 1; - break; - } else { - btrfs_dev_replace_stats_inc( - &sctx->dev_root-> - fs_info->dev_replace. - num_write_errors); - } + if (!sblocks_for_recheck[mirror_index]. + pagev[page_num]->io_error) { + sblock_other = sblocks_for_recheck + + mirror_index; + break; } } - if (!sub_success) { + if (!sblock_other) { /* * did not find a mirror to fetch the page * from. scrub_write_page_to_dev_replace() @@ -1146,13 +1132,17 @@ nodatasum_case: * filling the block with zeros before * submitting the write request */ + sblock_other = sblock_bad; + success = 0; + } + + if (scrub_write_page_to_dev_replace(sblock_other, + page_num) != 0) { + btrfs_dev_replace_stats_inc( + &sctx->dev_root-> + fs_info->dev_replace. + num_write_errors); success = 0; - ret = scrub_write_page_to_dev_replace( - sblock_bad, page_num); - if (ret) - btrfs_dev_replace_stats_inc( - &sctx->dev_root->fs_info-> - dev_replace.num_write_errors); } }