From patchwork Tue May 17 09:38:44 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qu Wenruo X-Patchwork-Id: 9110951 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 EAAC69FB33 for ; Tue, 17 May 2016 09:39:46 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 0063A201BB for ; Tue, 17 May 2016 09:39:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0E9C520268 for ; Tue, 17 May 2016 09:39:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755575AbcEQJjm (ORCPT ); Tue, 17 May 2016 05:39:42 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:4492 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1755139AbcEQJjF (ORCPT ); Tue, 17 May 2016 05:39:05 -0400 X-IronPort-AV: E=Sophos;i="5.20,367,1444665600"; d="scan'208";a="488083" Received: from unknown (HELO cn.fujitsu.com) ([10.167.250.3]) by song.cn.fujitsu.com with ESMTP; 17 May 2016 17:38:58 +0800 Received: from adam-work.localdomain (unknown [10.167.226.34]) by cn.fujitsu.com (Postfix) with ESMTP id 7564F4056406; Tue, 17 May 2016 17:38:53 +0800 (CST) From: Qu Wenruo To: linux-btrfs@vger.kernel.org, dsterba@suse.cz, jbacik@fb.com Cc: Lu Fengqi Subject: [RFC PATCH v2.1 10/16] btrfs-progs: fsck: Introduce function to check dev used space Date: Tue, 17 May 2016 17:38:44 +0800 Message-Id: <1463477930-3925-11-git-send-email-quwenruo@cn.fujitsu.com> X-Mailer: git-send-email 2.8.2 In-Reply-To: <1463477930-3925-1-git-send-email-quwenruo@cn.fujitsu.com> References: <1463477930-3925-1-git-send-email-quwenruo@cn.fujitsu.com> MIME-Version: 1.0 X-yoursite-MailScanner-ID: 7564F4056406.ABC11 X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: quwenruo@cn.fujitsu.com X-Spam-Status: No, score=-8.3 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Lu Fengqi Introduce function check_dev_item() to check used space with dev extent items. Signed-off-by: Lu Fengqi Signed-off-by: Qu Wenruo --- cmds-check.c | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) diff --git a/cmds-check.c b/cmds-check.c index 79a22c9..eec9648 100644 --- a/cmds-check.c +++ b/cmds-check.c @@ -327,6 +327,7 @@ struct root_item_info { #define CROSSING_STRIPE_BOUNDARY (1 << 4) /* For kernel scrub workaround */ #define ITEM_SIZE_MISMATCH (1 << 5) /* Bad item size */ #define UNKNOWN_TYPE (1 << 6) /* Unknown type */ +#define ACCOUNTING_MISMATCH (1 << 7) /* Used space accounting error */ static void *print_status_check(void *p) { @@ -9251,6 +9252,69 @@ out: return 0; } +/* + * Check the used space is correct with the dev item + */ +static int check_dev_item(struct btrfs_fs_info *fs_info, + struct extent_buffer *eb, int slot) +{ + struct btrfs_root *dev_root = fs_info->dev_root; + struct btrfs_dev_item *dev_item; + struct btrfs_path path; + struct btrfs_key key; + struct btrfs_dev_extent *ptr; + u64 dev_id; + u64 used; + u64 total = 0; + int ret; + + dev_item = btrfs_item_ptr(eb, slot, struct btrfs_dev_item); + dev_id = btrfs_device_id(eb, dev_item); + used = btrfs_device_bytes_used(eb, dev_item); + + key.objectid = dev_id; + key.type = BTRFS_DEV_EXTENT_KEY; + key.offset = 0; + + btrfs_init_path(&path); + ret = btrfs_search_slot(NULL, dev_root, &key, &path, 0, 0); + if (ret < 0) { + btrfs_item_key_to_cpu(eb, &key, slot); + error("Couldn't find any releative dev extent for dev[%llu, %u, %llu]", + key.objectid, key.type, key.offset); + btrfs_release_path(&path); + return REFERENCER_MISSING; + } + + /* Iterate dev_extents to calculate the used space of a device */ + while (1) { + btrfs_item_key_to_cpu(path.nodes[0], &key, path.slots[0]); + + if (key.objectid > dev_id) + break; + if (key.type != BTRFS_DEV_EXTENT_KEY || key.objectid != dev_id) + goto next; + + ptr = btrfs_item_ptr(path.nodes[0], path.slots[0], + struct btrfs_dev_extent); + total += btrfs_dev_extent_length(path.nodes[0], ptr); +next: + ret = btrfs_next_item(dev_root, &path); + if (ret) + break; + } + btrfs_release_path(&path); + + if (used != total) { + btrfs_item_key_to_cpu(eb, &key, slot); + error("Dev extent's total-byte(%llu) is not equal to byte-used(%llu) in dev[%llu, %u, %llu]", + total, used, BTRFS_ROOT_TREE_OBJECTID, + BTRFS_DEV_EXTENT_KEY, dev_id); + return ACCOUNTING_MISMATCH; + } + return 0; +} + static int btrfs_fsck_reinit_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, int overwrite) {