From mboxrd@z Thu Jan 1 00:00:00 1970 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=-18.8 required=3.0 tests=BAYES_00,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=unavailable 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 6D4AEC433E6 for ; Tue, 5 Jan 2021 09:30:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1448C225AC for ; Tue, 5 Jan 2021 09:30:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728470AbhAEJaG (ORCPT ); Tue, 5 Jan 2021 04:30:06 -0500 Received: from mail.kernel.org ([198.145.29.99]:49756 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728462AbhAEJaF (ORCPT ); Tue, 5 Jan 2021 04:30:05 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 0745522AB9; Tue, 5 Jan 2021 09:29:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1609838941; bh=HIyyo8liRqHsKYdvqDTiaA7kyReatdxKhUg7ukUFawA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YyfM5Vmca1jW6CFNb7/hg01SLgyM5FaIOnpkxQVyFpK+SCA42zBogoiryOOFeXO1C YmDediPSM1SNjnCyLs/+/SBkdywcYhaN/n13jF/uTuFO1aDoGSYezKmuk0/5sxx1TT uOe5LJ5Hp0Ny117bHvsi8cNNZND6j0NAAUV2p1vU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Hyeongseok Kim , Sami Tolvanen , Mike Snitzer , Sasha Levin Subject: [PATCH 4.19 29/29] dm verity: skip verity work if I/O error when system is shutting down Date: Tue, 5 Jan 2021 10:29:15 +0100 Message-Id: <20210105090822.311903132@linuxfoundation.org> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210105090818.518271884@linuxfoundation.org> References: <20210105090818.518271884@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Hyeongseok Kim [ Upstream commit 252bd1256396cebc6fc3526127fdb0b317601318 ] If emergency system shutdown is called, like by thermal shutdown, a dm device could be alive when the block device couldn't process I/O requests anymore. In this state, the handling of I/O errors by new dm I/O requests or by those already in-flight can lead to a verity corruption state, which is a misjudgment. So, skip verity work in response to I/O error when system is shutting down. Signed-off-by: Hyeongseok Kim Reviewed-by: Sami Tolvanen Signed-off-by: Mike Snitzer Signed-off-by: Sasha Levin --- drivers/md/dm-verity-target.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/md/dm-verity-target.c b/drivers/md/dm-verity-target.c index e3599b43f9eb9..599be2d2b0ae9 100644 --- a/drivers/md/dm-verity-target.c +++ b/drivers/md/dm-verity-target.c @@ -533,6 +533,15 @@ static int verity_verify_io(struct dm_verity_io *io) return 0; } +/* + * Skip verity work in response to I/O error when system is shutting down. + */ +static inline bool verity_is_system_shutting_down(void) +{ + return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF + || system_state == SYSTEM_RESTART; +} + /* * End one "io" structure with a given error. */ @@ -560,7 +569,8 @@ static void verity_end_io(struct bio *bio) { struct dm_verity_io *io = bio->bi_private; - if (bio->bi_status && !verity_fec_is_enabled(io->v)) { + if (bio->bi_status && + (!verity_fec_is_enabled(io->v) || verity_is_system_shutting_down())) { verity_finish_io(io, bio->bi_status); return; } -- 2.27.0