From patchwork Thu Feb 3 19:28:25 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Song Liu X-Patchwork-Id: 12734581 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0A0CCC433FE for ; Thu, 3 Feb 2022 19:29:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1353778AbiBCT3C convert rfc822-to-8bit (ORCPT ); Thu, 3 Feb 2022 14:29:02 -0500 Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:55180 "EHLO mx0b-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1353774AbiBCT3B (ORCPT ); Thu, 3 Feb 2022 14:29:01 -0500 Received: from pps.filterd (m0148460.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.1.2/8.16.1.2) with ESMTP id 213I6Wn2020586 for ; Thu, 3 Feb 2022 11:29:01 -0800 Received: from maileast.thefacebook.com ([163.114.130.16]) by mx0a-00082601.pphosted.com (PPS) with ESMTPS id 3e08t14sqw-3 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Thu, 03 Feb 2022 11:29:01 -0800 Received: from twshared11487.23.frc3.facebook.com (2620:10d:c0a8:1b::d) by mail.thefacebook.com (2620:10d:c0a8:83::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.21; Thu, 3 Feb 2022 11:28:59 -0800 Received: by devbig006.ftw2.facebook.com (Postfix, from userid 4523) id 8CB9029525AA1; Thu, 3 Feb 2022 11:28:47 -0800 (PST) From: Song Liu To: , CC: , , , , , Song Liu Subject: [PATCH v2 1/3] block: introduce BLK_STS_OFFLINE Date: Thu, 3 Feb 2022 11:28:25 -0800 Message-ID: <20220203192827.1370270-2-song@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220203192827.1370270-1-song@kernel.org> References: <20220203192827.1370270-1-song@kernel.org> MIME-Version: 1.0 X-FB-Internal: Safe X-Proofpoint-GUID: -vyPSI_lHgOJyCGBOyHj2IkBVHKzwLi8 X-Proofpoint-ORIG-GUID: -vyPSI_lHgOJyCGBOyHj2IkBVHKzwLi8 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.816,Hydra:6.0.425,FMLib:17.11.62.513 definitions=2022-02-03_06,2022-02-03_01,2021-12-02_01 X-Proofpoint-Spam-Details: rule=fb_outbound_notspam policy=fb_outbound score=0 adultscore=0 lowpriorityscore=0 bulkscore=0 priorityscore=1501 impostorscore=0 mlxscore=0 malwarescore=0 phishscore=0 clxscore=1015 mlxlogscore=999 suspectscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2201110000 definitions=main-2202030116 X-FB-Internal: deliver Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Currently, drivers reports BLK_STS_IOERR for devices that are not full online or being removed. This behavior could cause confusion for users, as they are not really I/O errors from the device. Solve this issue with a new state BLK_STS_OFFLINE, which reports "device offline error" in dmesg instead of "I/O error". EIO is intentionally kept to not change user visible return value. Signed-off-by: Song Liu Reviewed-by: Hannes Reinecke --- block/blk-core.c | 1 + include/linux/blk_types.h | 7 +++++++ 2 files changed, 8 insertions(+) diff --git a/block/blk-core.c b/block/blk-core.c index 61f6a0dc4511..24035dd2eef1 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -164,6 +164,7 @@ static const struct { [BLK_STS_RESOURCE] = { -ENOMEM, "kernel resource" }, [BLK_STS_DEV_RESOURCE] = { -EBUSY, "device resource" }, [BLK_STS_AGAIN] = { -EAGAIN, "nonblocking retry" }, + [BLK_STS_OFFLINE] = { -EIO, "device offline" }, /* device mapper special case, should not leak out: */ [BLK_STS_DM_REQUEUE] = { -EREMCHG, "dm internal retry" }, diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h index fe065c394fff..5561e58d158a 100644 --- a/include/linux/blk_types.h +++ b/include/linux/blk_types.h @@ -153,6 +153,13 @@ typedef u8 __bitwise blk_status_t; */ #define BLK_STS_ZONE_ACTIVE_RESOURCE ((__force blk_status_t)16) +/* + * BLK_STS_OFFLINE is returned from the driver when the target device is offline + * or is being taken offline. This could help differentiate the case where a + * device is intentionally being shut down from a real I/O error. + */ +#define BLK_STS_OFFLINE ((__force blk_status_t)17) + /** * blk_path_error - returns true if error may be path related * @error: status the request was completed with