From patchwork Tue May 17 09:38:46 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qu Wenruo X-Patchwork-Id: 9110841 Return-Path: X-Original-To: patchwork-linux-btrfs@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id C3809BF29F for ; Tue, 17 May 2016 09:39:21 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C6962201CD for ; Tue, 17 May 2016 09:39:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C5105201BB for ; Tue, 17 May 2016 09:39:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755559AbcEQJjO (ORCPT ); Tue, 17 May 2016 05:39:14 -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 S1755530AbcEQJjK (ORCPT ); Tue, 17 May 2016 05:39:10 -0400 X-IronPort-AV: E=Sophos;i="5.20,367,1444665600"; d="scan'208";a="488088" Received: from unknown (HELO cn.fujitsu.com) ([10.167.250.3]) by song.cn.fujitsu.com with ESMTP; 17 May 2016 17:38:59 +0800 Received: from adam-work.localdomain (unknown [10.167.226.34]) by cn.fujitsu.com (Postfix) with ESMTP id B6BBC405640B; 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 12/16] btrfs-progs: fsck: Introduce function to check chunk item Date: Tue, 17 May 2016 17:38:46 +0800 Message-Id: <1463477930-3925-13-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: B6BBC405640B.AD409 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_chunk_item() to check a chunk item. It will check all chunk stripes with dev extents and the corresponding block group item. Signed-off-by: Lu Fengqi Signed-off-by: Qu Wenruo --- cmds-check.c | 112 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 112 insertions(+) diff --git a/cmds-check.c b/cmds-check.c index fa059c6..8070eb9 100644 --- a/cmds-check.c +++ b/cmds-check.c @@ -9435,6 +9435,118 @@ out: return err; } +/* + * Check a chunk item. + * Including checking all referred dev_extents and block group + */ +static int check_chunk_item(struct btrfs_fs_info *fs_info, + struct extent_buffer *eb, int slot) +{ + struct btrfs_root *extent_root = fs_info->extent_root; + struct btrfs_root *dev_root = fs_info->dev_root; + struct btrfs_path path; + struct btrfs_key chunk_key; + struct btrfs_key bg_key; + struct btrfs_key devext_key; + struct btrfs_chunk *chunk; + struct extent_buffer *leaf; + struct btrfs_block_group_item *bi; + struct btrfs_block_group_item bg_item; + struct btrfs_dev_extent *ptr; + u32 sectorsize = btrfs_super_sectorsize(fs_info->super_copy); + u64 length; + u64 chunk_end; + u64 type; + u64 profile; + int num_stripes; + u64 offset; + u64 objectid; + int i; + int ret; + int err = 0; + + btrfs_item_key_to_cpu(eb, &chunk_key, slot); + chunk = btrfs_item_ptr(eb, slot, struct btrfs_chunk); + length = btrfs_chunk_length(eb, chunk); + chunk_end = chunk_key.offset + length; + if (!IS_ALIGNED(length, sectorsize)) { + error("Chunk[%llu %llu) not aligned to %u", + chunk_key.offset, chunk_end, sectorsize); + err |= BYTES_UNALIGNED; + goto out; + } + + type = btrfs_chunk_type(eb, chunk); + profile = type & BTRFS_BLOCK_GROUP_PROFILE_MASK; + if (!(type & BTRFS_BLOCK_GROUP_TYPE_MASK)) { + error("Chunk[%llu %llu) has no chunk type", + chunk_key.offset, chunk_end); + err |= UNKNOWN_TYPE; + } + if (profile && (profile & (profile - 1))) { + error("Chunk[%llu %llu) multiple profiled detected", + chunk_key.offset, chunk_end); + err |= UNKNOWN_TYPE; + } + + bg_key.objectid = chunk_key.offset; + bg_key.type = BTRFS_BLOCK_GROUP_ITEM_KEY; + bg_key.offset = length; + + btrfs_init_path(&path); + ret = btrfs_search_slot(NULL, extent_root, &bg_key, &path, 0, 0); + if (ret) { + error("Chunk[%llu %llu) didn't find the releative block group item", + chunk_key.offset, chunk_end); + err |= REFERENCER_MISSING; + } else{ + leaf = path.nodes[0]; + bi = btrfs_item_ptr(leaf, path.slots[0], + struct btrfs_block_group_item); + read_extent_buffer(leaf, &bg_item, (unsigned long)bi, + sizeof(bg_item)); + if (btrfs_block_group_flags(&bg_item) != type) { + error("Chunk[%llu %llu) releative block group item flags mismatch, wanted: %llu, have: %llu", + chunk_key.offset, chunk_end, type, + btrfs_block_group_flags(&bg_item)); + err |= REFERENCER_MISSING; + } + } + + num_stripes = btrfs_chunk_num_stripes(eb, chunk); + for (i = 0; i < num_stripes; i++) { + btrfs_release_path(&path); + btrfs_init_path(&path); + devext_key.objectid = btrfs_stripe_devid_nr(eb, chunk, i); + devext_key.type = BTRFS_DEV_EXTENT_KEY; + devext_key.offset = btrfs_stripe_offset_nr(eb, chunk, i); + + ret = btrfs_search_slot(NULL, dev_root, &devext_key, &path, + 0, 0); + if (ret) + goto not_match_dev; + + leaf = path.nodes[0]; + ptr = btrfs_item_ptr(leaf, path.slots[0], + struct btrfs_dev_extent); + objectid = btrfs_dev_extent_chunk_objectid(leaf, ptr); + offset = btrfs_dev_extent_chunk_offset(leaf, ptr); + if (objectid != chunk_key.objectid || + offset != chunk_key.offset || + btrfs_dev_extent_length(leaf, ptr) != length) + goto not_match_dev; + continue; +not_match_dev: + err |= BACKREF_MISSING; + error("Chunk[%llu %llu) stripe %d didn't find the releative dev extent", + chunk_key.objectid, chunk_end, i); + continue; + } + btrfs_release_path(&path); +out: + return err; +} + static int btrfs_fsck_reinit_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, int overwrite) {