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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id CC354D58E4B for ; Mon, 2 Mar 2026 04:08:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:In-Reply-To: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=NKGcz8tlyCPU7NrDjoUUnPCQmL3iAFi9IJXAqCR6JYs=; b=ralIsIwuCH1BFlJ3VhTUDiaEBT azHUexU5J9O6t39TP9in3UnseKHlNfodOsXb3H4wqhWBDI+YbKo7jy+pkYEFOlbub8FL135mx/Zds /8QiPA8n6CFXJSJTMktlR/RwbWNVGseuz5x7msZR7y536573Q5udqsrRjV+Zma42FI1psNvESuAhJ Y4ENxw7dVPKtoWa+ow1gxaRGXc4bnnTEyLIaMlSuu1/odGUP8W6ZW9MsNgrMj5JCkYeI9/wewUPem uVpAByyAsGR/lVE7bWyICVRNyP//K7Wq4+1FdXl2xeArU66ZFas+QWU1M/IsT+Cys7ajo07q0o78/ UzEjjdMQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vwuaM-0000000CEwr-3Hxx; Mon, 02 Mar 2026 04:08:46 +0000 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vwuaK-0000000CEwS-1Hsf for linux-nvme@lists.infradead.org; Mon, 02 Mar 2026 04:08:45 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1772424522; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=NKGcz8tlyCPU7NrDjoUUnPCQmL3iAFi9IJXAqCR6JYs=; b=h00pofgGzTHRH+ANV3ZWxhb26WT4El6r6omEx1qJUz3o6Mw7+z2lewNTgvotNy9f8m2Z5O HRTIZ1LJcl5Dir84hdBaNdRbx/n11xHpwPsd8wvHD3e5nxRq+WHJEkRm8AZJNv9w+KEx2S UxizI+Ca6F/jSm78X17KL+jo93EoXF0= Received: from mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-464-Q2mNSiM0N7OQD_xm4M8l5A-1; Sun, 01 Mar 2026 23:08:39 -0500 X-MC-Unique: Q2mNSiM0N7OQD_xm4M8l5A-1 X-Mimecast-MFC-AGG-ID: Q2mNSiM0N7OQD_xm4M8l5A_1772424517 Received: from mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.12]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 0330E1956089; Mon, 2 Mar 2026 04:08:37 +0000 (UTC) Received: from bmarzins-01.fast.eng.rdu2.dc.redhat.com (unknown [10.6.23.247]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id E984F19560A3; Mon, 2 Mar 2026 04:08:35 +0000 (UTC) Received: from bmarzins-01.fast.eng.rdu2.dc.redhat.com (localhost [127.0.0.1]) by bmarzins-01.fast.eng.rdu2.dc.redhat.com (8.18.1/8.17.1) with ESMTPS id 62248YjS1832189 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Sun, 1 Mar 2026 23:08:34 -0500 Received: (from bmarzins@localhost) by bmarzins-01.fast.eng.rdu2.dc.redhat.com (8.18.1/8.18.1/Submit) id 62248Ype1832188; Sun, 1 Mar 2026 23:08:34 -0500 Date: Sun, 1 Mar 2026 23:08:34 -0500 From: Benjamin Marzinski To: John Garry Cc: hch@lst.de, kbusch@kernel.org, sagi@grimberg.me, axboe@fb.com, martin.petersen@oracle.com, james.bottomley@hansenpartnership.com, hare@suse.com, jmeneghi@redhat.com, linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org, michael.christie@oracle.com, snitzer@kernel.org, dm-devel@lists.linux.dev, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 10/24] scsi-multipath: add scsi_mpath_{start,end}_request() Message-ID: References: <20260225153627.1032500-1-john.g.garry@oracle.com> <20260225153627.1032500-11-john.g.garry@oracle.com> MIME-Version: 1.0 In-Reply-To: <20260225153627.1032500-11-john.g.garry@oracle.com> X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 X-Mimecast-MFC-PROC-ID: oyRs1BCv1_YP9ZEcCgUlMDPQOgpkC1E0Odzw0-W9Hx8_1772424517 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260301_200844_471656_0B53231B X-CRM114-Status: GOOD ( 17.68 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org On Wed, Feb 25, 2026 at 03:36:13PM +0000, John Garry wrote: > Add scsi_mpath_{start,end}_request() to handle updating private multipath > request data, like nvme_mpath_{start,end}_request(). > > Since we may need to update mpath_disk data, add a callbacks in > scsi_driver to actually do this work for the scsi driver. > > Signed-off-by: John Garry > --- > drivers/scsi/scsi_lib.c | 4 ++++ > include/scsi/scsi_driver.h | 2 ++ > include/scsi/scsi_multipath.h | 24 ++++++++++++++++++++++++ > 3 files changed, 30 insertions(+) > > #ifdef CONFIG_SCSI_MULTIPATH > + void (*mpath_start_cmd)(struct scsi_cmnd *); > + void (*mpath_end_cmd)(struct scsi_cmnd *); > struct mpath_disk *(*to_mpath_disk)(struct request *); > #endif > }; > diff --git a/include/scsi/scsi_multipath.h b/include/scsi/scsi_multipath.h > index 07db217edb085..6cb3107260952 100644 > --- a/include/scsi/scsi_multipath.h > +++ b/include/scsi/scsi_multipath.h > @@ -56,6 +56,23 @@ void scsi_mpath_add_sysfs_link(struct scsi_device *sdev); > void scsi_mpath_remove_sysfs_link(struct scsi_device *sdev); > int scsi_mpath_get_head(struct scsi_mpath_head *); > void scsi_mpath_put_head(struct scsi_mpath_head *); > + > +static inline void scsi_mpath_start_request(struct request *req) > +{ > + struct scsi_cmnd *cmd = blk_mq_rq_to_pdu(req); > + > + if (is_mpath_request(req)) > + scsi_cmd_to_driver(cmd)->mpath_start_cmd(cmd); > +} > + > +static inline void scsi_mpath_end_request(struct request *req) > +{ > + struct scsi_cmnd *cmd = blk_mq_rq_to_pdu(req); > + > + if (is_mpath_request(req)) > + scsi_cmd_to_driver(cmd)->mpath_start_cmd(cmd); Copy-paste error. It should be: scsi_cmd_to_driver(cmd)->mpath_end_cmd(cmd); -Ben