From patchwork Thu May 20 09:19:37 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 445579 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=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, 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 82AF0C433B4 for ; Thu, 20 May 2021 10:22:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 62FF961074 for ; Thu, 20 May 2021 10:22:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236012AbhETKXx (ORCPT ); Thu, 20 May 2021 06:23:53 -0400 Received: from mail.kernel.org ([198.145.29.99]:53182 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236011AbhETKVi (ORCPT ); Thu, 20 May 2021 06:21:38 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 0EF81613F5; Thu, 20 May 2021 09:48:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1621504087; bh=rKrYEiyiX5DnnR1jU76RXfMmDXDAHeJ8joBUQjKDehg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WgMVjji24Mz19dmI65GtEiEK25VXKp5GoUXvTBfabOCFlwdpifQ1sGs60y8LFfAkE ctPzpEHuxwNav6lsDar1bp9KXPptVxvkm858X6xmUK4IISEvUtV8lZkTB11uqTJhPC 4YQ52VGvptEQ6ZsDDQT3eWCTwy0a+Uuc0Fm6URuI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Paul Clements , Song Liu Subject: [PATCH 4.14 085/323] md/raid1: properly indicate failure when ending a failed write request Date: Thu, 20 May 2021 11:19:37 +0200 Message-Id: <20210520092122.999226631@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210520092120.115153432@linuxfoundation.org> References: <20210520092120.115153432@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Paul Clements commit 2417b9869b81882ab90fd5ed1081a1cb2d4db1dd upstream. This patch addresses a data corruption bug in raid1 arrays using bitmaps. Without this fix, the bitmap bits for the failed I/O end up being cleared. Since we are in the failure leg of raid1_end_write_request, the request either needs to be retried (R1BIO_WriteError) or failed (R1BIO_Degraded). Fixes: eeba6809d8d5 ("md/raid1: end bio when the device faulty") Cc: stable@vger.kernel.org # v5.2+ Signed-off-by: Paul Clements Signed-off-by: Song Liu Signed-off-by: Greg Kroah-Hartman --- drivers/md/raid1.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -446,6 +446,8 @@ static void raid1_end_write_request(stru if (!test_bit(Faulty, &rdev->flags)) set_bit(R1BIO_WriteError, &r1_bio->state); else { + /* Fail the request */ + set_bit(R1BIO_Degraded, &r1_bio->state); /* Finished with this branch */ r1_bio->bios[mirror] = NULL; to_put = bio;