From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.cn.fujitsu.com ([183.91.158.132]:3171 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752111AbeBHDXX (ORCPT ); Wed, 7 Feb 2018 22:23:23 -0500 Received: from G08CNEXCHPEKD03.g08.fujitsu.local (unknown [10.167.33.85]) by cn.fujitsu.com (Postfix) with ESMTP id C6FB048AE768 for ; Thu, 8 Feb 2018 11:23:20 +0800 (CST) From: Su Yue To: CC: Subject: [PATCH v4 16/18] btrfs-progs: lowmem check: introduce repair_block_accounting() Date: Thu, 8 Feb 2018 11:27:35 +0800 Message-ID: <20180208032737.31561-17-suy.fnst@cn.fujitsu.com> In-Reply-To: <20180208032737.31561-1-suy.fnst@cn.fujitsu.com> References: <20180208032737.31561-1-suy.fnst@cn.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-btrfs-owner@vger.kernel.org List-ID: Introduce repair_block_accounting() which calls btrfs_fix_block_accounting() to repair block group accouting. Replace btrfs_fix_block_accounting() with the new function. Note: This patch and next patches cause error in lowmem repair like: "Error: Commit_root already set when starting transaction". This error will disappear after removing @trans finished. Signed-off-by: Su Yue --- check/mode-lowmem.c | 26 +++++++++++++++++++++++++- 1 file changed, 25 insertions(+), 1 deletion(-) diff --git a/check/mode-lowmem.c b/check/mode-lowmem.c index d92278d2993c..40a179f75319 100644 --- a/check/mode-lowmem.c +++ b/check/mode-lowmem.c @@ -537,6 +537,30 @@ static int end_avoid_extents_overwrite(struct btrfs_fs_info *fs_info) return ret; } +/* + * Wrapper function for btrfs_fix_block_accounting(). + * + * Returns 0 on success. + * Returns != 0 on error. + */ +static int repair_block_accounting(struct btrfs_fs_info *fs_info) +{ + struct btrfs_trans_handle *trans = NULL; + struct btrfs_root *root = fs_info->extent_root; + int ret; + + trans = btrfs_start_transaction(root, 1); + if (IS_ERR(trans)) { + ret = PTR_ERR(trans); + error("fail to start transaction %s", strerror(-ret)); + return ret; + } + + ret = btrfs_fix_block_accounting(trans, root); + btrfs_commit_transaction(trans, root); + return ret; +} + /* * This function only handles BACKREF_MISSING, * If corresponding extent item exists, increase the ref, else insert an extent @@ -4930,7 +4954,7 @@ out: reset_cached_block_groups(fs_info); /* update block accounting */ - ret = btrfs_fix_block_accounting(trans, root); + ret = repair_block_accounting(fs_info); if (ret) err |= ret; else -- 2.16.1