From patchwork Thu Jan 11 07:35:06 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Su Yue X-Patchwork-Id: 10157425 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 BB792601A1 for ; Thu, 11 Jan 2018 07:31:20 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id AB840286F1 for ; Thu, 11 Jan 2018 07:31:20 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A052E286F5; Thu, 11 Jan 2018 07:31:20 +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 39CE3286F2 for ; Thu, 11 Jan 2018 07:31:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932131AbeAKHbT (ORCPT ); Thu, 11 Jan 2018 02:31:19 -0500 Received: from mail.cn.fujitsu.com ([183.91.158.132]:53400 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753918AbeAKHbR (ORCPT ); Thu, 11 Jan 2018 02:31:17 -0500 X-IronPort-AV: E=Sophos;i="5.43,368,1503331200"; d="scan'208";a="35167970" Received: from bogon (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 11 Jan 2018 15:31:16 +0800 Received: from G08CNEXCHPEKD03.g08.fujitsu.local (unknown [10.167.33.85]) by cn.fujitsu.com (Postfix) with ESMTP id 9CBFC48AEA11 for ; Thu, 11 Jan 2018 15:31:16 +0800 (CST) Received: from archlinux.g08.fujitsu.local (10.167.226.31) by G08CNEXCHPEKD03.g08.fujitsu.local (10.167.33.89) with Microsoft SMTP Server (TLS) id 14.3.361.1; Thu, 11 Jan 2018 15:31:14 +0800 From: Su Yue To: CC: Subject: [PATCH v3 12/17] btrfs-progs: lowmem check: remove parameter @trans of repair_extent_item() Date: Thu, 11 Jan 2018 15:35:06 +0800 Message-ID: <20180111073511.25288-13-suy.fnst@cn.fujitsu.com> X-Mailer: git-send-email 2.15.1 In-Reply-To: <20180111073511.25288-1-suy.fnst@cn.fujitsu.com> References: <20180111073511.25288-1-suy.fnst@cn.fujitsu.com> MIME-Version: 1.0 X-Originating-IP: [10.167.226.31] X-yoursite-MailScanner-ID: 9CBFC48AEA11.AFAB8 X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: suy.fnst@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 This patch removes parameter @trans of repair_extent_item(). It calls try_avoid_extents_overwrite() and starts a transaction by itself. 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 --- cmds-check.c | 54 ++++++++++++++++++++++++++++++++++-------------------- 1 file changed, 34 insertions(+), 20 deletions(-) diff --git a/cmds-check.c b/cmds-check.c index 15cc628092c2..b78adba3203f 100644 --- a/cmds-check.c +++ b/cmds-check.c @@ -12888,40 +12888,55 @@ out: * means error after repair * Returns 0 nothing happened */ -static int repair_extent_item(struct btrfs_trans_handle *trans, - struct btrfs_root *root, struct btrfs_path *path, +static int repair_extent_item(struct btrfs_root *root, struct btrfs_path *path, u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid, u64 owner, u64 offset, int err) { + struct btrfs_trans_handle *trans; + struct btrfs_root *extent_root = root->fs_info->extent_root; struct btrfs_key old_key; int freed = 0; int ret; btrfs_item_key_to_cpu(path->nodes[0], &old_key, path->slots[0]); - if (err & (REFERENCER_MISSING | REFERENCER_MISMATCH)) { - /* delete the backref */ - ret = btrfs_free_extent(trans, root->fs_info->fs_root, bytenr, - num_bytes, parent, root_objectid, owner, offset); - if (!ret) { - freed = 1; - err &= ~REFERENCER_MISSING; - printf("Delete backref in extent [%llu %llu]\n", - bytenr, num_bytes); - } else { - error("fail to delete backref in extent [%llu %llu]", - bytenr, num_bytes); - } + if ((err & (REFERENCER_MISSING | REFERENCER_MISMATCH)) == 0) + return err; + + ret = try_avoid_extents_overwrite(root->fs_info); + if (ret) + return err; + + trans = btrfs_start_transaction(extent_root, 1); + if (IS_ERR(trans)) { + ret = PTR_ERR(trans); + error("fail to start transaction %s", strerror(-ret)); + /* nothing happened */ + ret = 0; + goto out; } + /* delete the backref */ + ret = btrfs_free_extent(trans, root->fs_info->fs_root, bytenr, + num_bytes, parent, root_objectid, owner, offset); + if (!ret) { + freed = 1; + err &= ~REFERENCER_MISSING; + printf("Delete backref in extent [%llu %llu]\n", + bytenr, num_bytes); + } else { + error("fail to delete backref in extent [%llu %llu]", + bytenr, num_bytes); + } + btrfs_commit_transaction(trans, extent_root); /* btrfs_free_extent may delete the extent */ btrfs_release_path(path); ret = btrfs_search_slot(NULL, root, &old_key, path, 0, 0); - if (ret) ret = -ENOENT; else if (freed) ret = err; +out: return ret; } @@ -12931,8 +12946,7 @@ static int repair_extent_item(struct btrfs_trans_handle *trans, * * Since we don't use extent_record anymore, introduce new error bit */ -static int check_extent_item(struct btrfs_trans_handle *trans, - struct btrfs_fs_info *fs_info, +static int check_extent_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path) { struct btrfs_extent_item *ei; @@ -13063,7 +13077,7 @@ next: } if (err && repair) { - ret = repair_extent_item(trans, fs_info->extent_root, path, + ret = repair_extent_item(fs_info->extent_root, path, key.objectid, num_bytes, parent, root_objectid, owner, owner_offset, ret); if (ret < 0) @@ -13612,7 +13626,7 @@ again: break; case BTRFS_EXTENT_ITEM_KEY: case BTRFS_METADATA_ITEM_KEY: - ret = check_extent_item(trans, fs_info, path); + ret = check_extent_item(fs_info, path); err |= ret; break; case BTRFS_EXTENT_CSUM_KEY: