From patchwork Thu Sep 21 21:22:52 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bart Van Assche X-Patchwork-Id: 9964821 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 18603602D8 for ; Thu, 21 Sep 2017 21:23:10 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 07752295F8 for ; Thu, 21 Sep 2017 21:23:10 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id EF6DB29602; Thu, 21 Sep 2017 21:23:09 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 02CB6295F9 for ; Thu, 21 Sep 2017 21:23:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751791AbdIUVXD (ORCPT ); Thu, 21 Sep 2017 17:23:03 -0400 Received: from esa1.hgst.iphmx.com ([68.232.141.245]:62081 "EHLO esa1.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751728AbdIUVXD (ORCPT ); Thu, 21 Sep 2017 17:23:03 -0400 X-IronPort-AV: E=Sophos;i="5.42,426,1500912000"; d="scan'208";a="155631633" Received: from sjappemgw12.hgst.com (HELO sjappemgw11.hgst.com) ([199.255.44.66]) by ob1.hgst.iphmx.com with ESMTP; 22 Sep 2017 05:23:02 +0800 Received: from thinkpad-bart.sdcorp.global.sandisk.com (HELO thinkpad-bart.int.fusionio.com) ([10.11.172.152]) by sjappemgw11.hgst.com with ESMTP; 21 Sep 2017 14:22:57 -0700 From: Bart Van Assche To: Jens Axboe Cc: linux-block@vger.kernel.org, Christoph Hellwig , "Martin K . Petersen" , =Oleksandr Natalenko , Bart Van Assche , Ming Lei , Hannes Reinecke , Johannes Thumshirn Subject: [PATCH v2 1/4] block: Convert RQF_PREEMPT into REQ_PREEMPT Date: Thu, 21 Sep 2017 14:22:52 -0700 Message-Id: <20170921212255.12788-2-bart.vanassche@wdc.com> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20170921212255.12788-1-bart.vanassche@wdc.com> References: <20170921212255.12788-1-bart.vanassche@wdc.com> Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch does not change any functionality but makes the REQ_PREEMPT flag available to blk_get_request(). A later patch will add code to blk_get_request() that checks the REQ_PREEMPT flag. Note: the IDE sense_rq request is allocated statically so there is no blk_get_request() call that corresponds to this request. Signed-off-by: Bart Van Assche Cc: Ming Lei Cc: Christoph Hellwig Cc: Hannes Reinecke Cc: Johannes Thumshirn --- block/blk-mq-debugfs.c | 2 +- drivers/ide/ide-atapi.c | 3 +-- drivers/ide/ide-io.c | 2 +- drivers/ide/ide-pm.c | 4 ++-- drivers/scsi/scsi_lib.c | 11 ++++++----- include/linux/blk_types.h | 6 ++++++ include/linux/blkdev.h | 3 --- 7 files changed, 17 insertions(+), 14 deletions(-) diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c index 980e73095643..62ac248a4984 100644 --- a/block/blk-mq-debugfs.c +++ b/block/blk-mq-debugfs.c @@ -266,6 +266,7 @@ static const char *const cmd_flag_name[] = { CMD_FLAG_NAME(BACKGROUND), CMD_FLAG_NAME(NOUNMAP), CMD_FLAG_NAME(NOWAIT), + CMD_FLAG_NAME(PREEMPT), }; #undef CMD_FLAG_NAME @@ -279,7 +280,6 @@ static const char *const rqf_name[] = { RQF_NAME(MIXED_MERGE), RQF_NAME(MQ_INFLIGHT), RQF_NAME(DONTPREP), - RQF_NAME(PREEMPT), RQF_NAME(COPY_USER), RQF_NAME(FAILED), RQF_NAME(QUIET), diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c index 14d1e7d9a1d6..1258739d5fa1 100644 --- a/drivers/ide/ide-atapi.c +++ b/drivers/ide/ide-atapi.c @@ -211,9 +211,8 @@ void ide_prep_sense(ide_drive_t *drive, struct request *rq) } sense_rq->rq_disk = rq->rq_disk; - sense_rq->cmd_flags = REQ_OP_DRV_IN; + sense_rq->cmd_flags = REQ_OP_DRV_IN | REQ_PREEMPT; ide_req(sense_rq)->type = ATA_PRIV_SENSE; - sense_rq->rq_flags |= RQF_PREEMPT; req->cmd[0] = GPCMD_REQUEST_SENSE; req->cmd[4] = cmd_len; diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c index 3a234701d92c..06ffccd0fb10 100644 --- a/drivers/ide/ide-io.c +++ b/drivers/ide/ide-io.c @@ -539,7 +539,7 @@ void do_ide_request(struct request_queue *q) */ if ((drive->dev_flags & IDE_DFLAG_BLOCKED) && ata_pm_request(rq) == 0 && - (rq->rq_flags & RQF_PREEMPT) == 0) { + (rq->cmd_flags & REQ_PREEMPT) == 0) { /* there should be no pending command at this point */ ide_unlock_port(hwif); goto plug_device; diff --git a/drivers/ide/ide-pm.c b/drivers/ide/ide-pm.c index 544f02d673ca..f8d2709dcd56 100644 --- a/drivers/ide/ide-pm.c +++ b/drivers/ide/ide-pm.c @@ -89,9 +89,9 @@ int generic_ide_resume(struct device *dev) } memset(&rqpm, 0, sizeof(rqpm)); - rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, __GFP_RECLAIM); + rq = blk_get_request(drive->queue, REQ_OP_DRV_IN | REQ_PREEMPT, + __GFP_RECLAIM); ide_req(rq)->type = ATA_PRIV_PM_RESUME; - rq->rq_flags |= RQF_PREEMPT; rq->special = &rqpm; rqpm.pm_step = IDE_PM_START_RESUME; rqpm.pm_state = PM_EVENT_ON; diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index f6097b89d5d3..6db8247577a0 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -245,8 +245,9 @@ int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd, int ret = DRIVER_ERROR << 24; req = blk_get_request(sdev->request_queue, - data_direction == DMA_TO_DEVICE ? - REQ_OP_SCSI_OUT : REQ_OP_SCSI_IN, __GFP_RECLAIM); + (data_direction == DMA_TO_DEVICE ? + REQ_OP_SCSI_OUT : REQ_OP_SCSI_IN) | REQ_PREEMPT, + __GFP_RECLAIM); if (IS_ERR(req)) return ret; rq = scsi_req(req); @@ -260,7 +261,7 @@ int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd, rq->retries = retries; req->timeout = timeout; req->cmd_flags |= flags; - req->rq_flags |= rq_flags | RQF_QUIET | RQF_PREEMPT; + req->rq_flags |= rq_flags | RQF_QUIET; /* * head injection *required* here otherwise quiesce won't work @@ -1271,7 +1272,7 @@ scsi_prep_state_check(struct scsi_device *sdev, struct request *req) /* * If the devices is blocked we defer normal commands. */ - if (!(req->rq_flags & RQF_PREEMPT)) + if (!(req->cmd_flags & REQ_PREEMPT)) ret = BLKPREP_DEFER; break; default: @@ -1280,7 +1281,7 @@ scsi_prep_state_check(struct scsi_device *sdev, struct request *req) * special commands. In particular any user initiated * command is not allowed. */ - if (!(req->rq_flags & RQF_PREEMPT)) + if (!(req->cmd_flags & REQ_PREEMPT)) ret = BLKPREP_KILL; break; } diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h index a2d2aa709cef..b6b6bf44e462 100644 --- a/include/linux/blk_types.h +++ b/include/linux/blk_types.h @@ -229,6 +229,11 @@ enum req_flag_bits { __REQ_NOUNMAP, /* do not free blocks when zeroing */ __REQ_NOWAIT, /* Don't wait if request will block */ + /* + * set for "ide_preempt" requests and also for requests for which the + * SCSI "quiesce" state must be ignored. + */ + __REQ_PREEMPT, __REQ_NR_BITS, /* stops here */ }; @@ -248,6 +253,7 @@ enum req_flag_bits { #define REQ_NOUNMAP (1ULL << __REQ_NOUNMAP) #define REQ_NOWAIT (1ULL << __REQ_NOWAIT) +#define REQ_PREEMPT (1ULL << __REQ_PREEMPT) #define REQ_FAILFAST_MASK \ (REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | REQ_FAILFAST_DRIVER) diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 460294bb0fa5..cd26901a6e25 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -96,9 +96,6 @@ typedef __u32 __bitwise req_flags_t; #define RQF_MQ_INFLIGHT ((__force req_flags_t)(1 << 6)) /* don't call prep for this one */ #define RQF_DONTPREP ((__force req_flags_t)(1 << 7)) -/* set for "ide_preempt" requests and also for requests for which the SCSI - "quiesce" state must be ignored. */ -#define RQF_PREEMPT ((__force req_flags_t)(1 << 8)) /* contains copies of user pages */ #define RQF_COPY_USER ((__force req_flags_t)(1 << 9)) /* vaguely specified driver internal error. Ignored by the block layer */