From patchwork Tue Sep 29 10:47:19 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hannes Reinecke X-Patchwork-Id: 7285021 Return-Path: X-Original-To: patchwork-linux-scsi@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id D40CBBEEA4 for ; Tue, 29 Sep 2015 10:48:19 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 3BD1E206D9 for ; Tue, 29 Sep 2015 10:48:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0CCCA206D8 for ; Tue, 29 Sep 2015 10:48:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964784AbbI2KsP (ORCPT ); Tue, 29 Sep 2015 06:48:15 -0400 Received: from mx2.suse.de ([195.135.220.15]:41946 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934676AbbI2Kr4 (ORCPT ); Tue, 29 Sep 2015 06:47:56 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (charybdis-ext.suse.de [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 7C10F75028; Tue, 29 Sep 2015 10:47:48 +0000 (UTC) From: Hannes Reinecke To: James Bottomley Cc: linux-scsi@vger.kernel.org, Christoph Hellwig , Bart van Assche , Ewan Milne , "Martin K. Petersen" , Hannes Reinecke Subject: [PATCH 17/36] scsi_dh_alua: switch to scsi_execute_req_flags() Date: Tue, 29 Sep 2015 12:47:19 +0200 Message-Id: <1443523658-87622-18-git-send-email-hare@suse.de> X-Mailer: git-send-email 1.8.5.6 In-Reply-To: <1443523658-87622-1-git-send-email-hare@suse.de> References: <1443523658-87622-1-git-send-email-hare@suse.de> Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP All commands are issued synchronously, so no need to open-code scsi_execute_req_flags() anymore. And we can get rid of the static sense code structure element. scsi_execute_req_flags() will be setting REQ_QUIET and REQ_PREEMPT, but that is perfectly fine as we're evaluating and logging any errors ourselves and we really need to send the command even if the device is quiesced. Reviewed-by: Christoph Hellwig Reviewed-by: Ewan Milne Signed-off-by: Hannes Reinecke --- drivers/scsi/device_handler/scsi_dh_alua.c | 125 +++++++++-------------------- 1 file changed, 36 insertions(+), 89 deletions(-) diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c b/drivers/scsi/device_handler/scsi_dh_alua.c index b645593..b72cea6 100644 --- a/drivers/scsi/device_handler/scsi_dh_alua.c +++ b/drivers/scsi/device_handler/scsi_dh_alua.c @@ -75,7 +75,6 @@ struct alua_dh_data { unsigned char *buff; int bufflen; unsigned char transition_tmo; - unsigned char sense[SCSI_SENSE_BUFFERSIZE]; struct scsi_device *sdev; activate_complete callback_fn; void *callback_data; @@ -102,71 +101,30 @@ static int realloc_buffer(struct alua_dh_data *h, unsigned len) return 0; } -static struct request *get_alua_req(struct scsi_device *sdev, - void *buffer, unsigned buflen, int rw) -{ - struct request *rq; - struct request_queue *q = sdev->request_queue; - - rq = blk_get_request(q, rw, GFP_NOIO); - - if (IS_ERR(rq)) { - sdev_printk(KERN_INFO, sdev, - "%s: blk_get_request failed\n", __func__); - return NULL; - } - blk_rq_set_block_pc(rq); - - if (buflen && blk_rq_map_kern(q, rq, buffer, buflen, GFP_NOIO)) { - blk_put_request(rq); - sdev_printk(KERN_INFO, sdev, - "%s: blk_rq_map_kern failed\n", __func__); - return NULL; - } - - rq->cmd_flags |= REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | - REQ_FAILFAST_DRIVER; - rq->retries = ALUA_FAILOVER_RETRIES; - rq->timeout = ALUA_FAILOVER_TIMEOUT * HZ; - - return rq; -} - /* * submit_rtpg - Issue a REPORT TARGET GROUP STATES command * @sdev: sdev the command should be sent to */ -static unsigned submit_rtpg(struct scsi_device *sdev, unsigned char *buff, - int bufflen, unsigned char *sense, int flags) +static int submit_rtpg(struct scsi_device *sdev, unsigned char *buff, + int bufflen, struct scsi_sense_hdr *sshdr, int flags) { - struct request *rq; - int err = 0; - - rq = get_alua_req(sdev, buff, bufflen, READ); - if (!rq) { - err = DRIVER_BUSY << 24; - goto done; - } + u8 cdb[COMMAND_SIZE(MAINTENANCE_IN)]; + int req_flags = REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | + REQ_FAILFAST_DRIVER; /* Prepare the command. */ - rq->cmd[0] = MAINTENANCE_IN; + memset(cdb, 0x0, COMMAND_SIZE(MAINTENANCE_IN)); + cdb[0] = MAINTENANCE_IN; if (!(flags & ALUA_RTPG_EXT_HDR_UNSUPP)) - rq->cmd[1] = MI_REPORT_TARGET_PGS | MI_EXT_HDR_PARAM_FMT; + cdb[1] = MI_REPORT_TARGET_PGS | MI_EXT_HDR_PARAM_FMT; else - rq->cmd[1] = MI_REPORT_TARGET_PGS; - put_unaligned_be32(bufflen, &rq->cmd[6]); - rq->cmd_len = COMMAND_SIZE(MAINTENANCE_IN); - - rq->sense = sense; - memset(rq->sense, 0, SCSI_SENSE_BUFFERSIZE); - rq->sense_len = 0; - - blk_execute_rq(rq->q, NULL, rq, 1); - if (rq->errors) - err = rq->errors; - blk_put_request(rq); -done: - return err; + cdb[1] = MI_REPORT_TARGET_PGS; + put_unaligned_be32(bufflen, &cdb[6]); + + return scsi_execute_req_flags(sdev, cdb, DMA_FROM_DEVICE, + buff, bufflen, sshdr, + ALUA_FAILOVER_TIMEOUT * HZ, + ALUA_FAILOVER_RETRIES, NULL, req_flags); } /* @@ -176,40 +134,30 @@ done: * to 'active/optimized' and let the array firmware figure out * the states of the remaining groups. */ -static unsigned submit_stpg(struct scsi_device *sdev, int group_id, - unsigned char *sense) +static int submit_stpg(struct scsi_device *sdev, int group_id, + struct scsi_sense_hdr *sshdr) { - struct request *rq; + u8 cdb[COMMAND_SIZE(MAINTENANCE_OUT)]; unsigned char stpg_data[8]; int stpg_len = 8; - int err = 0; + int req_flags = REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | + REQ_FAILFAST_DRIVER; /* Prepare the data buffer */ memset(stpg_data, 0, stpg_len); stpg_data[4] = TPGS_STATE_OPTIMIZED & 0x0f; put_unaligned_be16(group_id, &stpg_data[6]); - rq = get_alua_req(sdev, stpg_data, stpg_len, WRITE); - if (!rq) - return DRIVER_BUSY << 24; - /* Prepare the command. */ - rq->cmd[0] = MAINTENANCE_OUT; - rq->cmd[1] = MO_SET_TARGET_PGS; - put_unaligned_be32(stpg_len, &rq->cmd[6]); - rq->cmd_len = COMMAND_SIZE(MAINTENANCE_OUT); - - rq->sense = sense; - memset(rq->sense, 0, SCSI_SENSE_BUFFERSIZE); - rq->sense_len = 0; - - blk_execute_rq(rq->q, NULL, rq, 1); - if (rq->errors) - err = rq->errors; - - blk_put_request(rq); - - return err; + memset(cdb, 0x0, COMMAND_SIZE(MAINTENANCE_OUT)); + cdb[0] = MAINTENANCE_OUT; + cdb[1] = MO_SET_TARGET_PGS; + put_unaligned_be32(stpg_len, &cdb[6]); + + return scsi_execute_req_flags(sdev, cdb, DMA_TO_DEVICE, + stpg_data, stpg_len, + sshdr, ALUA_FAILOVER_TIMEOUT * HZ, + ALUA_FAILOVER_RETRIES, NULL, req_flags); } /* @@ -445,14 +393,14 @@ static int alua_rtpg(struct scsi_device *sdev, struct alua_dh_data *h, int wait_ expiry = round_jiffies_up(jiffies + h->transition_tmo * HZ); retry: - retval = submit_rtpg(sdev, h->buff, h->bufflen, h->sense, h->flags); + retval = submit_rtpg(sdev, h->buff, h->bufflen, &sense_hdr, h->flags); + if (retval) { - if (!scsi_normalize_sense(h->sense, SCSI_SENSE_BUFFERSIZE, - &sense_hdr)) { + if (!scsi_sense_valid(&sense_hdr)) { sdev_printk(KERN_INFO, sdev, "%s: rtpg failed, result %d\n", ALUA_DH_NAME, retval); - if (driver_byte(retval) == DRIVER_BUSY) + if (driver_byte(retval) == DRIVER_ERROR) return SCSI_DH_DEV_TEMP_BUSY; return SCSI_DH_IO; } @@ -611,15 +559,14 @@ static unsigned alua_stpg(struct scsi_device *sdev, struct alua_dh_data *h) } /* Set state to transitioning */ h->state = TPGS_STATE_TRANSITIONING; - retval = submit_stpg(sdev, h->group_id, h->sense); + retval = submit_stpg(sdev, h->group_id, &sense_hdr); if (retval) { - if (!scsi_normalize_sense(h->sense, SCSI_SENSE_BUFFERSIZE, - &sense_hdr)) { + if (!scsi_sense_valid(&sense_hdr)) { sdev_printk(KERN_INFO, sdev, "%s: stpg failed, result %d", ALUA_DH_NAME, retval); - if (driver_byte(retval) == DRIVER_BUSY) + if (driver_byte(retval) == DRIVER_ERROR) return SCSI_DH_DEV_TEMP_BUSY; } else { sdev_printk(KERN_INFO, h->sdev, "%s: stpg failed\n",