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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT 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 F17D8C432C3 for ; Wed, 20 Nov 2019 10:31:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CA3B62243E for ; Wed, 20 Nov 2019 10:31:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728575AbfKTKb2 (ORCPT ); Wed, 20 Nov 2019 05:31:28 -0500 Received: from mx2.suse.de ([195.135.220.15]:49200 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726001AbfKTKb2 (ORCPT ); Wed, 20 Nov 2019 05:31:28 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 6E738B191; Wed, 20 Nov 2019 10:31:26 +0000 (UTC) From: Hannes Reinecke To: "Martin K. Petersen" Cc: Christoph Hellwig , James Bottomley , linux-scsi@vger.kernel.org, Hannes Reinecke Subject: [PATCH 02/11] scsi: add scsi_host_flush_commands() helper Date: Wed, 20 Nov 2019 11:31:05 +0100 Message-Id: <20191120103114.24723-3-hare@suse.de> X-Mailer: git-send-email 2.16.4 In-Reply-To: <20191120103114.24723-1-hare@suse.de> References: <20191120103114.24723-1-hare@suse.de> Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Add a helper scsi_host_flush_commands() to terminate all outstanding commands on a scsi host. Signed-off-by: Hannes Reinecke --- drivers/scsi/hosts.c | 29 +++++++++++++++++++++++++++++ include/scsi/scsi_host.h | 1 + 2 files changed, 30 insertions(+) diff --git a/drivers/scsi/hosts.c b/drivers/scsi/hosts.c index 1d669e47b692..c26fa1fe6103 100644 --- a/drivers/scsi/hosts.c +++ b/drivers/scsi/hosts.c @@ -650,3 +650,32 @@ void scsi_flush_work(struct Scsi_Host *shost) flush_workqueue(shost->work_q); } EXPORT_SYMBOL_GPL(scsi_flush_work); + +static bool flush_cmds_iter(struct request *rq, void *data, bool reserved) +{ + struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq); + int status = *(int *)data; + + if (reserved) + return true; + scsi_dma_unmap(scmd); + scmd->result = status << 16; + scmd->scsi_done(scmd); + return true; +} + +/** + * scsi_host_flush_commands -- Terminate all running commands + * @shost: Scsi Host on which commands should be terminated + * @status: Status to be set for the terminated commands + * + * There is no protection against modification of the number + * of outstanding commands. It is the responsibility of the + * caller to ensure that concurrent I/O submission and/or + * completion is stopped when calling this function. + */ +void scsi_host_flush_commands(struct Scsi_Host *shost, int status) +{ + blk_mq_tagset_busy_iter(&shost->tag_set, flush_cmds_iter, &status); +} +EXPORT_SYMBOL_GPL(scsi_host_flush_commands); diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h index f577647bf5f2..cb9a6fe9ad5b 100644 --- a/include/scsi/scsi_host.h +++ b/include/scsi/scsi_host.h @@ -735,6 +735,7 @@ extern int scsi_host_busy(struct Scsi_Host *shost); extern void scsi_host_put(struct Scsi_Host *t); extern struct Scsi_Host *scsi_host_lookup(unsigned short); extern const char *scsi_host_state_name(enum scsi_host_state); +extern void scsi_host_flush_commands(struct Scsi_Host *shost, int status); static inline int __must_check scsi_add_host(struct Scsi_Host *host, struct device *dev) -- 2.16.4