From patchwork Mon Jun 28 15:15:56 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martin Wilck X-Patchwork-Id: 468145 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, URIBL_BLOCKED, 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 D253FC2B9F4 for ; Mon, 28 Jun 2021 15:20:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C27F961949 for ; Mon, 28 Jun 2021 15:20:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237160AbhF1PWm (ORCPT ); Mon, 28 Jun 2021 11:22:42 -0400 Received: from smtp-out1.suse.de ([195.135.220.28]:57792 "EHLO smtp-out1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237521AbhF1PTs (ORCPT ); Mon, 28 Jun 2021 11:19:48 -0400 Received: from imap.suse.de (imap-alt.suse-dmz.suse.de [192.168.254.47]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id CA595224B4; Mon, 28 Jun 2021 15:17:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1624893439; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=72vzEdeI67TNBamj/NSvbzifW0vrJrVIQXgQ2w7uS3M=; b=E0kaVD9m1sEa5j9Q2yrHMmtgSNTihORHSc/E6zXhJ/He9jq4UG961tU87RHsV3T67Tfgtw atQmU6dsnQBepI/kCuyulK9+atyIHNfMtfEV72679P7n/jWbzgRa7hALDFMhrtZjPHICGL hoirrA+NcYYjsgn69qgDlAMfpT4114M= Received: from imap3-int (imap-alt.suse-dmz.suse.de [192.168.254.47]) by imap.suse.de (Postfix) with ESMTP id 58DA311906; Mon, 28 Jun 2021 15:17:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1624893439; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=72vzEdeI67TNBamj/NSvbzifW0vrJrVIQXgQ2w7uS3M=; b=E0kaVD9m1sEa5j9Q2yrHMmtgSNTihORHSc/E6zXhJ/He9jq4UG961tU87RHsV3T67Tfgtw atQmU6dsnQBepI/kCuyulK9+atyIHNfMtfEV72679P7n/jWbzgRa7hALDFMhrtZjPHICGL hoirrA+NcYYjsgn69qgDlAMfpT4114M= Received: from director2.suse.de ([192.168.254.72]) by imap3-int with ESMTPSA id QBBGFP/n2WDaJwAALh3uQQ (envelope-from ); Mon, 28 Jun 2021 15:17:19 +0000 From: mwilck@suse.com To: Mike Snitzer , Alasdair G Kergon , Bart Van Assche , "Martin K. Petersen" , linux-scsi@vger.kernel.org, dm-devel@redhat.com, Hannes Reinecke , Christoph Hellwig Cc: Daniel Wagner , linux-block@vger.kernel.org, Paolo Bonzini , Benjamin Marzinski , nkoenig@redhat.com, emilne@redhat.com, Martin Wilck Subject: [PATCH v5 1/3] scsi: scsi_ioctl: export __scsi_result_to_blk_status() Date: Mon, 28 Jun 2021 17:15:56 +0200 Message-Id: <20210628151558.2289-2-mwilck@suse.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210628151558.2289-1-mwilck@suse.com> References: <20210628151558.2289-1-mwilck@suse.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Martin Wilck This makes it possible to use scsi_result_to_blk_status() from code that shouldn't depend on scsi_mod (e.g. device mapper). scsi_ioctl.c is selected by CONFIG_BLK_SCSI_REQUEST, which is automatically selected by CONFIG_SCSI. Signed-off-by: Martin Wilck --- block/scsi_ioctl.c | 47 +++++++++++++++++++++++++++++++++++++++++ drivers/scsi/scsi_lib.c | 24 +-------------------- include/linux/blkdev.h | 1 + 3 files changed, 49 insertions(+), 23 deletions(-) diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c index fa6df11b8bdd..19b63b64ecbc 100644 --- a/block/scsi_ioctl.c +++ b/block/scsi_ioctl.c @@ -882,6 +882,53 @@ void scsi_req_init(struct scsi_request *req) } EXPORT_SYMBOL(scsi_req_init); +/* See set_host_byte() in include/scsi/scsi_cmnd.h */ +static void __set_host_byte(int *result, char status) +{ + *result = (*result & 0xff00ffff) | (status << 16); +} + +/** + * __scsi_result_to_blk_status - translate a SCSI result code into blk_status_t + * @cmd: SCSI command + * @cmd_result: pointer to scsi cmnd result code to be possibly changed + * + * Translate a SCSI result code into a blk_status_t value. May reset the host + * byte of @cmd_result. + */ +blk_status_t __scsi_result_to_blk_status(int *cmd_result, int result) +{ + switch (host_byte(result)) { + case DID_OK: + /* + * Also check the other bytes than the status byte in result + * to handle the case when a SCSI LLD sets result to + * DRIVER_SENSE << 24 without setting SAM_STAT_CHECK_CONDITION. + */ + if (scsi_status_is_good(result)) + return BLK_STS_OK; + return BLK_STS_IOERR; + case DID_TRANSPORT_FAILFAST: + case DID_TRANSPORT_MARGINAL: + return BLK_STS_TRANSPORT; + case DID_TARGET_FAILURE: + __set_host_byte(cmd_result, DID_OK); + return BLK_STS_TARGET; + case DID_NEXUS_FAILURE: + __set_host_byte(cmd_result, DID_OK); + return BLK_STS_NEXUS; + case DID_ALLOC_FAILURE: + __set_host_byte(cmd_result, DID_OK); + return BLK_STS_NOSPC; + case DID_MEDIUM_ERROR: + __set_host_byte(cmd_result, DID_OK); + return BLK_STS_MEDIUM; + default: + return BLK_STS_IOERR; + } +} +EXPORT_SYMBOL(__scsi_result_to_blk_status); + static int __init blk_scsi_ioctl_init(void) { blk_set_cmd_filter_defaults(&blk_default_cmd_filter); diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 6b994baf87c2..2c0eca3693af 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -589,29 +589,7 @@ static bool scsi_end_request(struct request *req, blk_status_t error, */ static blk_status_t scsi_result_to_blk_status(struct scsi_cmnd *cmd, int result) { - switch (host_byte(result)) { - case DID_OK: - if (scsi_status_is_good(result)) - return BLK_STS_OK; - return BLK_STS_IOERR; - case DID_TRANSPORT_FAILFAST: - case DID_TRANSPORT_MARGINAL: - return BLK_STS_TRANSPORT; - case DID_TARGET_FAILURE: - set_host_byte(cmd, DID_OK); - return BLK_STS_TARGET; - case DID_NEXUS_FAILURE: - set_host_byte(cmd, DID_OK); - return BLK_STS_NEXUS; - case DID_ALLOC_FAILURE: - set_host_byte(cmd, DID_OK); - return BLK_STS_NOSPC; - case DID_MEDIUM_ERROR: - set_host_byte(cmd, DID_OK); - return BLK_STS_MEDIUM; - default: - return BLK_STS_IOERR; - } + return __scsi_result_to_blk_status(&cmd->result, result); } /* Helper for scsi_io_completion() when "reprep" action required. */ diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 1255823b2bc0..48497a77428d 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -2021,4 +2021,5 @@ int fsync_bdev(struct block_device *bdev); int freeze_bdev(struct block_device *bdev); int thaw_bdev(struct block_device *bdev); +blk_status_t __scsi_result_to_blk_status(int *cmd_result, int result); #endif /* _LINUX_BLKDEV_H */