From patchwork Tue Sep 1 15:10:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 310528 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 17D31C433E2 for ; Tue, 1 Sep 2020 15:24:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DCB5E20BED for ; Tue, 1 Sep 2020 15:24:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598973857; bh=jJzN0qvUgOE1cdUaazlXbpW9jjzT4Ui/+dJXl3ovzjA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=VhiniEIaTR0nkN5NeUyGQxDivcUkxKcE3EELj9EAWJLEwr9QxhDvJnG+30zFh0WJp /fcz19DiqAZIH9DEKZmGqNHEloZ/kWFtIq+Nqte+ooMisttqsmd2hE4fayPlimu54S ZZuo1A+Wp5LJm/dT/Gtpm1wtM+/t2hJqYMJOcf+Q= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729944AbgIAPYO (ORCPT ); Tue, 1 Sep 2020 11:24:14 -0400 Received: from mail.kernel.org ([198.145.29.99]:47698 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729201AbgIAPYF (ORCPT ); Tue, 1 Sep 2020 11:24:05 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 367B92100A; Tue, 1 Sep 2020 15:24:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598973844; bh=jJzN0qvUgOE1cdUaazlXbpW9jjzT4Ui/+dJXl3ovzjA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DBSTd633kkcAEJT8+SyfE6IoI/DdtpYXW4mxw04BSfnR2Dr4oGAX70+0fVq1OZGW0 wujUup4queHN0hM/qG2jOoPKvSDyDZRzhM2S1KN6e7ysKyAbjaJx9isiJPVTNwK+7C B5E7CEMFsPIWGZ+BiCjz5qeQWU/tHQ7//fxcK+xA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, "zhangyi (F)" , Theodore Tso , Sasha Levin Subject: [PATCH 4.19 062/125] jbd2: abort journal if free a async write error metadata buffer Date: Tue, 1 Sep 2020 17:10:17 +0200 Message-Id: <20200901150937.613171075@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200901150934.576210879@linuxfoundation.org> References: <20200901150934.576210879@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: zhangyi (F) [ Upstream commit c044f3d8360d2ecf831ba2cc9f08cf9fb2c699fb ] If we free a metadata buffer which has been failed to async write out in the background, the jbd2 checkpoint procedure will not detect this failure in jbd2_log_do_checkpoint(), so it may lead to filesystem inconsistency after cleanup journal tail. This patch abort the journal if free a buffer has write_io_error flag to prevent potential further inconsistency. Signed-off-by: zhangyi (F) Link: https://lore.kernel.org/r/20200620025427.1756360-5-yi.zhang@huawei.com Signed-off-by: Theodore Ts'o Signed-off-by: Sasha Levin --- fs/jbd2/transaction.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c index 5a0de78a5d71a..8c305593fb51f 100644 --- a/fs/jbd2/transaction.c +++ b/fs/jbd2/transaction.c @@ -2009,6 +2009,7 @@ int jbd2_journal_try_to_free_buffers(journal_t *journal, { struct buffer_head *head; struct buffer_head *bh; + bool has_write_io_error = false; int ret = 0; J_ASSERT(PageLocked(page)); @@ -2033,11 +2034,26 @@ int jbd2_journal_try_to_free_buffers(journal_t *journal, jbd_unlock_bh_state(bh); if (buffer_jbd(bh)) goto busy; + + /* + * If we free a metadata buffer which has been failed to + * write out, the jbd2 checkpoint procedure will not detect + * this failure and may lead to filesystem inconsistency + * after cleanup journal tail. + */ + if (buffer_write_io_error(bh)) { + pr_err("JBD2: Error while async write back metadata bh %llu.", + (unsigned long long)bh->b_blocknr); + has_write_io_error = true; + } } while ((bh = bh->b_this_page) != head); ret = try_to_free_buffers(page); busy: + if (has_write_io_error) + jbd2_journal_abort(journal, -EIO); + return ret; }