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=-13.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,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 D8C84C49EAB for ; Mon, 28 Jun 2021 09:52:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B0AB661C5D for ; Mon, 28 Jun 2021 09:52:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232559AbhF1Jy7 (ORCPT ); Mon, 28 Jun 2021 05:54:59 -0400 Received: from smtp-out2.suse.de ([195.135.220.29]:35618 "EHLO smtp-out2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230256AbhF1Jy6 (ORCPT ); Mon, 28 Jun 2021 05:54:58 -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-out2.suse.de (Postfix) with ESMTPS id F1A412024E; Mon, 28 Jun 2021 09:52:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1624873952; 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; bh=jcMOu4krSlIQ/8p/D4yLFDxD/+qBE6qXsMwq+0AZDFE=; b=csWenWRu980DgF1QQBsZyDsriPESZZ7dEGJMgf3Sx7bIIvfCqaB1tVpv8xi7Ld0gpndOR4 ix45I5J1UQ2ulKWegNwiL6+FhHFaHnAnmrdUWmc+jQrZ23htg/V8tRx/LS6BGklfbfFj4b r4VQfWkvy0l0w6xtF6Bd2GHmTY6rX9U= Received: from imap3-int (imap-alt.suse-dmz.suse.de [192.168.254.47]) by imap.suse.de (Postfix) with ESMTP id 68AD911906; Mon, 28 Jun 2021 09:52:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1624873951; 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; bh=jcMOu4krSlIQ/8p/D4yLFDxD/+qBE6qXsMwq+0AZDFE=; b=QR3uqo2TRlQfazgc07qKiCfSqQRDvTOVDaPS/BNH8Xi0IEKZNq/GW7uFM6Ibl2FuJpMiMh 2WargP5MLWvIYeUT7OmcOXpSjMG2WAbMJVjkRQHcBYE2vjUB7PTQI0EJnNlGpSX0rlcqqH 7Xnym5ZNCVcJ7SAc6hYdoW3ngXenBFQ= Received: from director2.suse.de ([192.168.254.72]) by imap3-int with ESMTPSA id qi4YF9+b2WAqagAALh3uQQ (envelope-from ); Mon, 28 Jun 2021 09:52:31 +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 Cc: Daniel Wagner , linux-block@vger.kernel.org, Paolo Bonzini , Christoph Hellwig , Benjamin Marzinski , nkoenig@redhat.com, emilne@redhat.com, Martin Wilck Subject: [PATCH v4 0/3] scsi/dm: dm_blk_ioctl(): implement failover for SG_IO on dm-multipath Date: Mon, 28 Jun 2021 11:52:07 +0200 Message-Id: <20210628095210.26249-1-mwilck@suse.com> X-Mailer: git-send-email 2.32.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org From: Martin Wilck Hello Mike, hello Martin, here is v4 of my attempt to add retry logic to SG_IO on dm-multipath devices. Regards Martin Changes v3->v4 (thanks to Mike Snitzer): - Added an additional helper function sg_io_to_blk_status() to scsi_ioctl.c, in order to avoid open-coding handling of the SCSI result code in device-mapper. - Added a new method dm_sg_io_ioctl_fn() in struct target_type, define only by the multipath target. This allows moving the bulk of the new code to dm-mpath.c, and avoids the wrong limitation of the code to request-based multipath. Changes v2->v3: - un-inlined scsi_result_to_blk_status again, and move the helper __scsi_result_to_blk_status to block/scsi_ioctl.c instead (Bart v. Assche) - open-coded the status/msg/host/driver-byte -> result conversion where the standard SCSI helpers aren't usable (Bart v. Assche) Changes v1->v2: - applied modifications from Mike Snitzer - moved SG_IO dependent code to a separate file, no scsi includes in dm.c any more - made the new code depend on a configuration option - separated out scsi changes, made scsi_result_to_blk_status() inline to avoid dependency of dm_mod from scsi_mod (Paolo Bonzini) Martin Wilck (3): scsi: scsi_ioctl: export __scsi_result_to_blk_status() scsi: scsi_ioctl: add sg_io_to_blk_status() dm mpath: add CONFIG_DM_MULTIPATH_SG_IO - failover for SG_IO block/scsi_ioctl.c | 72 ++++++++++++++++++++++- drivers/md/Kconfig | 11 ++++ drivers/md/dm-core.h | 5 ++ drivers/md/dm-mpath.c | 105 ++++++++++++++++++++++++++++++++++ drivers/md/dm.c | 26 ++++++++- drivers/scsi/scsi_lib.c | 24 +------- include/linux/blkdev.h | 4 ++ include/linux/device-mapper.h | 8 ++- 8 files changed, 226 insertions(+), 29 deletions(-) -- 2.32.0 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=-8.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED 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 8F858C49EA7 for ; Mon, 28 Jun 2021 09:53:09 +0000 (UTC) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [216.205.24.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 27BF861C67 for ; Mon, 28 Jun 2021 09:53:09 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 27BF861C67 Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=suse.com Authentication-Results: mail.kernel.org; spf=tempfail smtp.mailfrom=dm-devel-bounces@redhat.com Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-559-Jn8RuwEQO9aG8_PwNjfp9w-1; Mon, 28 Jun 2021 05:53:06 -0400 X-MC-Unique: Jn8RuwEQO9aG8_PwNjfp9w-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 5C3741835ADC; Mon, 28 Jun 2021 09:53:01 +0000 (UTC) Received: from colo-mx.corp.redhat.com (colo-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.20]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 3EB0F5DAA5; Mon, 28 Jun 2021 09:53:01 +0000 (UTC) Received: from lists01.pubmisc.prod.ext.phx2.redhat.com (lists01.pubmisc.prod.ext.phx2.redhat.com [10.5.19.33]) by colo-mx.corp.redhat.com (Postfix) with ESMTP id 0BEFD1801258; Mon, 28 Jun 2021 09:53:01 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id 15S9qgpD009176 for ; Mon, 28 Jun 2021 05:52:42 -0400 Received: by smtp.corp.redhat.com (Postfix) id 2CCEC50155; Mon, 28 Jun 2021 09:52:42 +0000 (UTC) Received: from mimecast-mx02.redhat.com (mimecast06.extmail.prod.ext.rdu2.redhat.com [10.11.55.22]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 25DCE5014F for ; Mon, 28 Jun 2021 09:52:38 +0000 (UTC) Received: from us-smtp-1.mimecast.com (us-smtp-delivery-1.mimecast.com [207.211.31.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id A1E06185A7A4 for ; Mon, 28 Jun 2021 09:52:38 +0000 (UTC) Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.220.29]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-347-VgWIqp4XPJKeFJtBv2uDuw-1; Mon, 28 Jun 2021 05:52:34 -0400 X-MC-Unique: VgWIqp4XPJKeFJtBv2uDuw-1 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-out2.suse.de (Postfix) with ESMTPS id F1A412024E; Mon, 28 Jun 2021 09:52:31 +0000 (UTC) Received: from imap3-int (imap-alt.suse-dmz.suse.de [192.168.254.47]) by imap.suse.de (Postfix) with ESMTP id 68AD911906; Mon, 28 Jun 2021 09:52:31 +0000 (UTC) Received: from director2.suse.de ([192.168.254.72]) by imap3-int with ESMTPSA id qi4YF9+b2WAqagAALh3uQQ (envelope-from ); Mon, 28 Jun 2021 09:52:31 +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 Date: Mon, 28 Jun 2021 11:52:07 +0200 Message-Id: <20210628095210.26249-1-mwilck@suse.com> MIME-Version: 1.0 X-Mimecast-Impersonation-Protect: Policy=CLT - Impersonation Protection Definition; Similar Internal Domain=false; Similar Monitored External Domain=false; Custom External Domain=false; Mimecast External Domain=false; Newly Observed Domain=false; Internal User Name=false; Custom Display Name List=false; Reply-to Address Mismatch=false; Targeted Threat Dictionary=false; Mimecast Threat Dictionary=false; Custom Threat Dictionary=false X-Scanned-By: MIMEDefang 2.79 on 10.11.54.5 X-MIME-Autoconverted: from quoted-printable to 8bit by lists01.pubmisc.prod.ext.phx2.redhat.com id 15S9qgpD009176 X-loop: dm-devel@redhat.com Cc: Daniel Wagner , emilne@redhat.com, Martin Wilck , linux-block@vger.kernel.org, nkoenig@redhat.com, Paolo Bonzini , Christoph Hellwig Subject: [dm-devel] [PATCH v4 0/3] scsi/dm: dm_blk_ioctl(): implement failover for SG_IO on dm-multipath X-BeenThere: dm-devel@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: device-mapper development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dm-devel-bounces@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit From: Martin Wilck Hello Mike, hello Martin, here is v4 of my attempt to add retry logic to SG_IO on dm-multipath devices. Regards Martin Changes v3->v4 (thanks to Mike Snitzer): - Added an additional helper function sg_io_to_blk_status() to scsi_ioctl.c, in order to avoid open-coding handling of the SCSI result code in device-mapper. - Added a new method dm_sg_io_ioctl_fn() in struct target_type, define only by the multipath target. This allows moving the bulk of the new code to dm-mpath.c, and avoids the wrong limitation of the code to request-based multipath. Changes v2->v3: - un-inlined scsi_result_to_blk_status again, and move the helper __scsi_result_to_blk_status to block/scsi_ioctl.c instead (Bart v. Assche) - open-coded the status/msg/host/driver-byte -> result conversion where the standard SCSI helpers aren't usable (Bart v. Assche) Changes v1->v2: - applied modifications from Mike Snitzer - moved SG_IO dependent code to a separate file, no scsi includes in dm.c any more - made the new code depend on a configuration option - separated out scsi changes, made scsi_result_to_blk_status() inline to avoid dependency of dm_mod from scsi_mod (Paolo Bonzini) Martin Wilck (3): scsi: scsi_ioctl: export __scsi_result_to_blk_status() scsi: scsi_ioctl: add sg_io_to_blk_status() dm mpath: add CONFIG_DM_MULTIPATH_SG_IO - failover for SG_IO block/scsi_ioctl.c | 72 ++++++++++++++++++++++- drivers/md/Kconfig | 11 ++++ drivers/md/dm-core.h | 5 ++ drivers/md/dm-mpath.c | 105 ++++++++++++++++++++++++++++++++++ drivers/md/dm.c | 26 ++++++++- drivers/scsi/scsi_lib.c | 24 +------- include/linux/blkdev.h | 4 ++ include/linux/device-mapper.h | 8 ++- 8 files changed, 226 insertions(+), 29 deletions(-) -- 2.32.0 -- dm-devel mailing list dm-devel@redhat.com https://listman.redhat.com/mailman/listinfo/dm-devel