From patchwork Thu May 25 06:22:04 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qu Wenruo X-Patchwork-Id: 9747779 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 952426032C for ; Thu, 25 May 2017 06:23:24 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 962C0274D0 for ; Thu, 25 May 2017 06:23:24 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 89790269E2; Thu, 25 May 2017 06:23:24 +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=-6.9 required=2.0 tests=BAYES_00,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 2B6D1269E2 for ; Thu, 25 May 2017 06:23:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1165196AbdEYGXV (ORCPT ); Thu, 25 May 2017 02:23:21 -0400 Received: from cn.fujitsu.com ([59.151.112.132]:45979 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1165156AbdEYGWo (ORCPT ); Thu, 25 May 2017 02:22:44 -0400 X-IronPort-AV: E=Sophos;i="5.22,518,1449504000"; d="scan'208";a="19288971" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 25 May 2017 14:22:36 +0800 Received: from G08CNEXCHPEKD02.g08.fujitsu.local (unknown [10.167.33.83]) by cn.fujitsu.com (Postfix) with ESMTP id 4DE7447C6D4C; Thu, 25 May 2017 14:22:34 +0800 (CST) Received: from localhost.localdomain (10.167.226.34) by G08CNEXCHPEKD02.g08.fujitsu.local (10.167.33.89) with Microsoft SMTP Server (TLS) id 14.3.319.2; Thu, 25 May 2017 14:22:33 +0800 From: Qu Wenruo To: CC: , Subject: [PATCH v4 19/20] btrfs-progs: scrub: Introduce function to check a whole block group Date: Thu, 25 May 2017 14:22:04 +0800 Message-ID: <20170525062205.11660-20-quwenruo@cn.fujitsu.com> X-Mailer: git-send-email 2.13.0 In-Reply-To: <20170525062205.11660-1-quwenruo@cn.fujitsu.com> References: <20170525062205.11660-1-quwenruo@cn.fujitsu.com> MIME-Version: 1.0 X-Originating-IP: [10.167.226.34] X-yoursite-MailScanner-ID: 4DE7447C6D4C.A0FC6 X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: quwenruo@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 Introduce new function, scrub_one_block_group(), to scrub a block group. For Single/DUP/RAID0/RAID1/RAID10, we use old mirror number based map_block, and check extent by extent. For parity based profile (RAID5/6), we use new map_block_v2() and check full stripe by full stripe. Signed-off-by: Qu Wenruo --- scrub.c | 92 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 92 insertions(+) diff --git a/scrub.c b/scrub.c index 1c9a7fc4..5fa2260b 100644 --- a/scrub.c +++ b/scrub.c @@ -1205,3 +1205,95 @@ out: free(map_block); return ret; } + +/* + * Scrub one block group. + * + * This function will handle all profiles current btrfs supports. + * Return 0 for scrubbing the block group. Found error will be recorded into + * scrub_ctx. + * Return <0 for fatal error preventing scrubing the block group. + */ +static int scrub_one_block_group(struct btrfs_fs_info *fs_info, + struct btrfs_scrub_progress *scrub_ctx, + struct btrfs_block_group_cache *bg_cache, + int write) +{ + struct btrfs_root *extent_root = fs_info->extent_root; + struct btrfs_path *path; + struct btrfs_key key; + u64 bg_start = bg_cache->key.objectid; + u64 bg_len = bg_cache->key.offset; + int ret; + + if (bg_cache->flags & + (BTRFS_BLOCK_GROUP_RAID5 | BTRFS_BLOCK_GROUP_RAID6)) { + u64 cur = bg_start; + u64 next; + + while (cur < bg_start + bg_len) { + ret = scrub_one_full_stripe(fs_info, scrub_ctx, cur, + &next, write); + /* Ignore any non-fatal error */ + if (ret < 0 && ret != -EIO) { + error("fatal error happens checking one full stripe at bytenr: %llu: %s", + cur, strerror(-ret)); + return ret; + } + cur = next; + } + /* Ignore any -EIO error, such error will be reported at last */ + return 0; + } + /* None parity based profile, check extent by extent */ + key.objectid = bg_start; + key.type = 0; + key.offset = 0; + + path = btrfs_alloc_path(); + if (!path) + return -ENOMEM; + ret = btrfs_search_slot(NULL, extent_root, &key, path, 0, 0); + if (ret < 0) + goto out; + while (1) { + struct extent_buffer *eb = path->nodes[0]; + int slot = path->slots[0]; + u64 extent_start; + u64 extent_len; + + btrfs_item_key_to_cpu(eb, &key, slot); + if (key.objectid >= bg_start + bg_len) + break; + if (key.type != BTRFS_EXTENT_ITEM_KEY && + key.type != BTRFS_METADATA_ITEM_KEY) + goto next; + + extent_start = key.objectid; + if (key.type == BTRFS_METADATA_ITEM_KEY) + extent_len = extent_root->nodesize; + else + extent_len = key.offset; + + ret = scrub_one_extent(fs_info, scrub_ctx, path, extent_start, + extent_len, write); + if (ret < 0 && ret != -EIO) { + error("fatal error checking extent bytenr %llu len %llu: %s", + extent_start, extent_len, strerror(-ret)); + goto out; + } + ret = 0; +next: + ret = btrfs_next_extent_item(extent_root, path, bg_start + + bg_len); + if (ret < 0) + goto out; + if (ret > 0) { + ret = 0; + break; + } + } +out: + btrfs_free_path(path); + return ret; +}