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scsi: core: Remove struct scsi_request
Let submitters initialize the scmd->allowed field directly instead of indirecting through struct scsi_request and remove the now superfluous structure. Link: https://lore.kernel.org/r/20220224175552.988286-8-hch@lst.de Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: John Garry <john.garry@huawei.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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@ -33,7 +33,7 @@ static int scsi_flags_show(struct seq_file *m, const unsigned long flags,
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void scsi_show_rq(struct seq_file *m, struct request *rq)
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{
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struct scsi_cmnd *cmd = container_of(scsi_req(rq), typeof(*cmd), req);
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struct scsi_cmnd *cmd = blk_mq_rq_to_pdu(rq);
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int alloc_ms = jiffies_to_msecs(jiffies - cmd->jiffies_at_alloc);
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int timeout_ms = jiffies_to_msecs(rq->timeout);
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char buf[80] = "(?)";
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@ -2023,12 +2023,10 @@ static void scsi_eh_lock_door(struct scsi_device *sdev)
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{
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struct scsi_cmnd *scmd;
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struct request *req;
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struct scsi_request *rq;
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req = scsi_alloc_request(sdev->request_queue, REQ_OP_DRV_IN, 0);
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if (IS_ERR(req))
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return;
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rq = scsi_req(req);
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scmd = blk_mq_rq_to_pdu(req);
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scmd->cmnd[0] = ALLOW_MEDIUM_REMOVAL;
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@ -2041,7 +2039,7 @@ static void scsi_eh_lock_door(struct scsi_device *sdev)
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req->rq_flags |= RQF_QUIET;
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req->timeout = 10 * HZ;
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rq->retries = 5;
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scmd->allowed = 5;
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blk_execute_rq_nowait(req, true, eh_lock_door_done);
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}
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@ -411,7 +411,6 @@ static int sg_io(struct scsi_device *sdev, struct sg_io_hdr *hdr, fmode_t mode)
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int writing = 0;
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int at_head = 0;
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struct request *rq;
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struct scsi_request *req;
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struct scsi_cmnd *scmd;
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struct bio *bio;
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@ -440,7 +439,6 @@ static int sg_io(struct scsi_device *sdev, struct sg_io_hdr *hdr, fmode_t mode)
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REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
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if (IS_ERR(rq))
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return PTR_ERR(rq);
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req = scsi_req(rq);
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scmd = blk_mq_rq_to_pdu(rq);
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if (hdr->cmd_len > sizeof(scmd->cmnd)) {
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@ -475,7 +473,7 @@ static int sg_io(struct scsi_device *sdev, struct sg_io_hdr *hdr, fmode_t mode)
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goto out_put_request;
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bio = rq->bio;
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req->retries = 0;
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scmd->allowed = 0;
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start_time = jiffies;
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@ -521,7 +519,6 @@ static int sg_scsi_ioctl(struct request_queue *q, fmode_t mode,
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struct scsi_ioctl_command __user *sic)
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{
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struct request *rq;
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struct scsi_request *req;
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int err;
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unsigned int in_len, out_len, bytes, opcode, cmdlen;
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struct scsi_cmnd *scmd;
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@ -555,7 +552,6 @@ static int sg_scsi_ioctl(struct request_queue *q, fmode_t mode,
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err = PTR_ERR(rq);
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goto error_free_buffer;
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}
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req = scsi_req(rq);
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scmd = blk_mq_rq_to_pdu(rq);
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cmdlen = COMMAND_SIZE(opcode);
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@ -576,13 +572,13 @@ static int sg_scsi_ioctl(struct request_queue *q, fmode_t mode,
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goto error;
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/* default. possible overridden later */
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req->retries = 5;
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scmd->allowed = 5;
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switch (opcode) {
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case SEND_DIAGNOSTIC:
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case FORMAT_UNIT:
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rq->timeout = FORMAT_UNIT_TIMEOUT;
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req->retries = 1;
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scmd->allowed = 1;
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break;
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case START_STOP:
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rq->timeout = START_STOP_TIMEOUT;
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@ -595,7 +591,7 @@ static int sg_scsi_ioctl(struct request_queue *q, fmode_t mode,
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break;
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case READ_DEFECT_DATA:
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rq->timeout = READ_DEFECT_DATA_TIMEOUT;
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req->retries = 1;
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scmd->allowed = 1;
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break;
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default:
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rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
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@ -213,7 +213,6 @@ int __scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
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int *resid)
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{
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struct request *req;
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struct scsi_request *rq;
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struct scsi_cmnd *scmd;
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int ret;
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@ -224,8 +223,6 @@ int __scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
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if (IS_ERR(req))
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return PTR_ERR(req);
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rq = scsi_req(req);
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if (bufflen) {
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ret = blk_rq_map_kern(sdev->request_queue, req,
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buffer, bufflen, GFP_NOIO);
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@ -235,7 +232,7 @@ int __scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
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scmd = blk_mq_rq_to_pdu(req);
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scmd->cmd_len = COMMAND_SIZE(cmd[0]);
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memcpy(scmd->cmnd, cmd, scmd->cmd_len);
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rq->retries = retries;
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scmd->allowed = retries;
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req->timeout = timeout;
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req->cmd_flags |= flags;
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req->rq_flags |= rq_flags | RQF_QUIET;
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@ -1189,7 +1186,6 @@ static blk_status_t scsi_setup_scsi_cmnd(struct scsi_device *sdev,
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}
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cmd->transfersize = blk_rq_bytes(req);
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cmd->allowed = scsi_req(req)->retries;
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return BLK_STS_OK;
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}
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@ -1725,7 +1725,6 @@ sg_start_req(Sg_request *srp, unsigned char *cmd)
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{
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int res;
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struct request *rq;
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struct scsi_request *req;
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Sg_fd *sfp = srp->parentfp;
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sg_io_hdr_t *hp = &srp->header;
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int dxfer_len = (int) hp->dxfer_len;
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@ -1758,7 +1757,6 @@ sg_start_req(Sg_request *srp, unsigned char *cmd)
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if (IS_ERR(rq))
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return PTR_ERR(rq);
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scmd = blk_mq_rq_to_pdu(rq);
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req = scsi_req(rq);
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if (hp->cmd_len > sizeof(scmd->cmnd)) {
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blk_mq_free_request(rq);
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@ -1770,7 +1768,7 @@ sg_start_req(Sg_request *srp, unsigned char *cmd)
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srp->rq = rq;
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rq->end_io_data = srp;
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req->retries = SG_DEFAULT_RETRIES;
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scmd->allowed = SG_DEFAULT_RETRIES;
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if ((dxfer_len <= 0) || (dxfer_dir == SG_DXFER_NONE))
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return 0;
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@ -965,7 +965,6 @@ static int sr_read_cdda_bpc(struct cdrom_device_info *cdi, void __user *ubuf,
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{
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struct gendisk *disk = cdi->disk;
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u32 len = nr * CD_FRAMESIZE_RAW;
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struct scsi_request *req;
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struct scsi_cmnd *scmd;
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struct request *rq;
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struct bio *bio;
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@ -974,7 +973,6 @@ static int sr_read_cdda_bpc(struct cdrom_device_info *cdi, void __user *ubuf,
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rq = scsi_alloc_request(disk->queue, REQ_OP_DRV_IN, 0);
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if (IS_ERR(rq))
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return PTR_ERR(rq);
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req = scsi_req(rq);
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scmd = blk_mq_rq_to_pdu(rq);
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ret = blk_rq_map_user(disk->queue, rq, NULL, ubuf, len, GFP_KERNEL);
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@ -539,7 +539,6 @@ static int st_scsi_execute(struct st_request *SRpnt, const unsigned char *cmd,
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int timeout, int retries)
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{
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struct request *req;
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struct scsi_request *rq;
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struct rq_map_data *mdata = &SRpnt->stp->buffer->map_data;
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int err = 0;
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struct scsi_tape *STp = SRpnt->stp;
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@ -551,7 +550,6 @@ static int st_scsi_execute(struct st_request *SRpnt, const unsigned char *cmd,
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if (IS_ERR(req))
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return PTR_ERR(req);
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scmd = blk_mq_rq_to_pdu(req);
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rq = scsi_req(req);
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req->rq_flags |= RQF_QUIET;
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mdata->null_mapped = 1;
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@ -580,7 +578,7 @@ static int st_scsi_execute(struct st_request *SRpnt, const unsigned char *cmd,
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scmd->cmd_len = COMMAND_SIZE(cmd[0]);
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memcpy(scmd->cmnd, cmd, scmd->cmd_len);
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req->timeout = timeout;
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rq->retries = retries;
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scmd->allowed = retries;
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req->end_io_data = SRpnt;
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blk_execute_rq_nowait(req, true, st_scsi_execute_end);
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@ -993,7 +993,7 @@ pscsi_execute_cmd(struct se_cmd *cmd)
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req->timeout = PS_TIMEOUT_DISK;
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else
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req->timeout = PS_TIMEOUT_OTHER;
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scsi_req(req)->retries = PS_RETRY;
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scmd->allowed = PS_RETRY;
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cmd->priv = scmd->cmnd;
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@ -68,7 +68,6 @@ enum scsi_cmnd_submitter {
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} __packed;
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struct scsi_cmnd {
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struct scsi_request req;
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struct scsi_device *device;
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struct list_head eh_entry; /* entry for the host eh_abort_list/eh_cmd_q */
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struct delayed_work abort_work;
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@ -4,13 +4,4 @@
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#include <linux/blk-mq.h>
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struct scsi_request {
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int retries;
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};
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static inline struct scsi_request *scsi_req(struct request *rq)
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{
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return blk_mq_rq_to_pdu(rq);
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}
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#endif /* _SCSI_SCSI_REQUEST_H */
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