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scsi: core: Remove the cmd field from struct scsi_request
Now that each scsi_request is backed by a scsi_cmnd, there is no need to indirect the CDB storage. Change all submitters of SCSI passthrough requests to store the CDB information directly in the scsi_cmnd, and while doing so allocate the full 32 bytes that cover all Linux supported SCSI hosts instead of requiring dynamic allocation for > 16 byte CDBs. On 64-bit systems this does not change the size of the scsi_cmnd at all, while on 32-bit systems it slightly increases it for now, but that increase will be made up by the removal of the remaining scsi_request fields. Link: https://lore.kernel.org/r/20220224175552.988286-4-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>
This commit is contained in:
Christoph Hellwig
Martin K. Petersen
parent
71bada345b
commit
ce70fd9a55
@ -1022,7 +1022,9 @@ void ata_scsi_sdev_config(struct scsi_device *sdev)
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*/
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bool ata_scsi_dma_need_drain(struct request *rq)
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{
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return atapi_cmd_type(scsi_req(rq)->cmd[0]) == ATAPI_MISC;
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struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq);
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return atapi_cmd_type(scmd->cmnd[0]) == ATAPI_MISC;
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}
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EXPORT_SYMBOL_GPL(ata_scsi_dma_need_drain);
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@ -693,6 +693,7 @@ static void pkt_rbtree_insert(struct pktcdvd_device *pd, struct pkt_rb_node *nod
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static int pkt_generic_packet(struct pktcdvd_device *pd, struct packet_command *cgc)
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{
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struct request_queue *q = bdev_get_queue(pd->bdev);
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struct scsi_cmnd *scmd;
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struct request *rq;
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int ret = 0;
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@ -700,6 +701,7 @@ static int pkt_generic_packet(struct pktcdvd_device *pd, struct packet_command *
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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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scmd = blk_mq_rq_to_pdu(rq);
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if (cgc->buflen) {
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ret = blk_rq_map_kern(q, rq, cgc->buffer, cgc->buflen,
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@ -708,8 +710,8 @@ static int pkt_generic_packet(struct pktcdvd_device *pd, struct packet_command *
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goto out;
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}
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scsi_req(rq)->cmd_len = COMMAND_SIZE(cgc->cmd[0]);
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memcpy(scsi_req(rq)->cmd, cgc->cmd, CDROM_PACKET_SIZE);
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scmd->cmd_len = COMMAND_SIZE(cgc->cmd[0]);
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memcpy(scmd->cmnd, cgc->cmd, CDROM_PACKET_SIZE);
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rq->timeout = 60*HZ;
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if (cgc->quiet)
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@ -13,6 +13,7 @@ static int scsi_bsg_sg_io_fn(struct request_queue *q, struct sg_io_v4 *hdr,
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fmode_t mode, unsigned int timeout)
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{
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struct scsi_request *sreq;
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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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int ret;
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@ -33,19 +34,19 @@ static int scsi_bsg_sg_io_fn(struct request_queue *q, struct sg_io_v4 *hdr,
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ret = -ENOMEM;
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sreq = scsi_req(rq);
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sreq->cmd_len = hdr->request_len;
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if (sreq->cmd_len > BLK_MAX_CDB) {
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sreq->cmd = kzalloc(sreq->cmd_len, GFP_KERNEL);
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if (!sreq->cmd)
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goto out_put_request;
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scmd = blk_mq_rq_to_pdu(rq);
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scmd->cmd_len = hdr->request_len;
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if (scmd->cmd_len > sizeof(scmd->cmnd)) {
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ret = -EINVAL;
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goto out_put_request;
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}
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ret = -EFAULT;
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if (copy_from_user(sreq->cmd, uptr64(hdr->request), sreq->cmd_len))
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goto out_free_cmd;
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if (copy_from_user(scmd->cmnd, uptr64(hdr->request), scmd->cmd_len))
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goto out_put_request;
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ret = -EPERM;
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if (!scsi_cmd_allowed(sreq->cmd, mode))
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goto out_free_cmd;
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if (!scsi_cmd_allowed(scmd->cmnd, mode))
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goto out_put_request;
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ret = 0;
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if (hdr->dout_xfer_len) {
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@ -57,7 +58,7 @@ static int scsi_bsg_sg_io_fn(struct request_queue *q, struct sg_io_v4 *hdr,
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}
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if (ret)
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goto out_free_cmd;
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goto out_put_request;
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bio = rq->bio;
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blk_execute_rq(rq, !(hdr->flags & BSG_FLAG_Q_AT_TAIL));
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@ -92,8 +93,6 @@ static int scsi_bsg_sg_io_fn(struct request_queue *q, struct sg_io_v4 *hdr,
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blk_rq_unmap_user(bio);
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out_free_cmd:
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scsi_req_free_cmd(scsi_req(rq));
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out_put_request:
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blk_mq_free_request(rq);
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return ret;
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@ -36,11 +36,9 @@ void scsi_show_rq(struct seq_file *m, struct request *rq)
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struct scsi_cmnd *cmd = container_of(scsi_req(rq), typeof(*cmd), req);
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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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const u8 *const cdb = READ_ONCE(cmd->cmnd);
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char buf[80] = "(?)";
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if (cdb)
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__scsi_format_command(buf, sizeof(buf), cdb, cmd->cmd_len);
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__scsi_format_command(buf, sizeof(buf), cmd->cmnd, cmd->cmd_len);
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seq_printf(m, ", .cmd=%s, .retries=%d, .result = %#x, .flags=", buf,
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cmd->retries, cmd->result);
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scsi_flags_show(m, cmd->flags, scsi_cmd_flags,
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@ -980,7 +980,7 @@ static void scsi_abort_eh_cmnd(struct scsi_cmnd *scmd)
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* @scmd: SCSI command structure to hijack
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* @ses: structure to save restore information
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* @cmnd: CDB to send. Can be NULL if no new cmnd is needed
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* @cmnd_size: size in bytes of @cmnd (must be <= BLK_MAX_CDB)
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* @cmnd_size: size in bytes of @cmnd (must be <= MAX_COMMAND_SIZE)
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* @sense_bytes: size of sense data to copy. or 0 (if != 0 @cmnd is ignored)
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*
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* This function is used to save a scsi command information before re-execution
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@ -1002,7 +1002,6 @@ void scsi_eh_prep_cmnd(struct scsi_cmnd *scmd, struct scsi_eh_save *ses,
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* command.
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*/
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ses->cmd_len = scmd->cmd_len;
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ses->cmnd = scmd->cmnd;
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ses->data_direction = scmd->sc_data_direction;
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ses->sdb = scmd->sdb;
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ses->result = scmd->result;
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@ -1013,8 +1012,8 @@ void scsi_eh_prep_cmnd(struct scsi_cmnd *scmd, struct scsi_eh_save *ses,
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scmd->prot_op = SCSI_PROT_NORMAL;
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scmd->eh_eflags = 0;
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scmd->cmnd = ses->eh_cmnd;
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memset(scmd->cmnd, 0, BLK_MAX_CDB);
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memcpy(ses->cmnd, scmd->cmnd, sizeof(ses->cmnd));
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memset(scmd->cmnd, 0, sizeof(scmd->cmnd));
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memset(&scmd->sdb, 0, sizeof(scmd->sdb));
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scmd->result = 0;
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scmd->req.resid_len = 0;
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@ -1033,7 +1032,7 @@ void scsi_eh_prep_cmnd(struct scsi_cmnd *scmd, struct scsi_eh_save *ses,
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} else {
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scmd->sc_data_direction = DMA_NONE;
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if (cmnd) {
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BUG_ON(cmnd_size > BLK_MAX_CDB);
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BUG_ON(cmnd_size > sizeof(scmd->cmnd));
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memcpy(scmd->cmnd, cmnd, cmnd_size);
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scmd->cmd_len = COMMAND_SIZE(scmd->cmnd[0]);
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}
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@ -1066,7 +1065,7 @@ void scsi_eh_restore_cmnd(struct scsi_cmnd* scmd, struct scsi_eh_save *ses)
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* Restore original data
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*/
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scmd->cmd_len = ses->cmd_len;
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scmd->cmnd = ses->cmnd;
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memcpy(scmd->cmnd, ses->cmnd, sizeof(ses->cmnd));
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scmd->sc_data_direction = ses->data_direction;
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scmd->sdb = ses->sdb;
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scmd->result = ses->result;
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@ -2022,6 +2021,7 @@ static void eh_lock_door_done(struct request *req, blk_status_t status)
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*/
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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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@ -2029,14 +2029,15 @@ static void scsi_eh_lock_door(struct scsi_device *sdev)
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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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rq->cmd[0] = ALLOW_MEDIUM_REMOVAL;
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rq->cmd[1] = 0;
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rq->cmd[2] = 0;
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rq->cmd[3] = 0;
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rq->cmd[4] = SCSI_REMOVAL_PREVENT;
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rq->cmd[5] = 0;
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rq->cmd_len = COMMAND_SIZE(rq->cmd[0]);
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scmd->cmnd[0] = ALLOW_MEDIUM_REMOVAL;
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scmd->cmnd[1] = 0;
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scmd->cmnd[2] = 0;
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scmd->cmnd[3] = 0;
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scmd->cmnd[4] = SCSI_REMOVAL_PREVENT;
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scmd->cmnd[5] = 0;
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scmd->cmd_len = COMMAND_SIZE(scmd->cmnd[0]);
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req->rq_flags |= RQF_QUIET;
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req->timeout = 10 * HZ;
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@ -2399,7 +2400,6 @@ scsi_ioctl_reset(struct scsi_device *dev, int __user *arg)
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scmd = (struct scsi_cmnd *)(rq + 1);
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scsi_init_command(dev, scmd);
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scmd->cmnd = scsi_req(rq)->cmd;
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scmd->submitter = SUBMITTED_BY_SCSI_RESET_IOCTL;
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memset(&scmd->sdb, 0, sizeof(scmd->sdb));
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@ -345,19 +345,15 @@ EXPORT_SYMBOL(scsi_cmd_allowed);
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static int scsi_fill_sghdr_rq(struct scsi_device *sdev, struct request *rq,
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struct sg_io_hdr *hdr, fmode_t mode)
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{
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struct scsi_request *req = scsi_req(rq);
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struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq);
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if (hdr->cmd_len < 6)
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return -EMSGSIZE;
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if (copy_from_user(req->cmd, hdr->cmdp, hdr->cmd_len))
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if (copy_from_user(scmd->cmnd, hdr->cmdp, hdr->cmd_len))
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return -EFAULT;
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if (!scsi_cmd_allowed(req->cmd, mode))
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if (!scsi_cmd_allowed(scmd->cmnd, mode))
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return -EPERM;
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/*
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* fill in request structure
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*/
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req->cmd_len = hdr->cmd_len;
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scmd->cmd_len = hdr->cmd_len;
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rq->timeout = msecs_to_jiffies(hdr->timeout);
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if (!rq->timeout)
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@ -416,6 +412,7 @@ static int sg_io(struct scsi_device *sdev, struct sg_io_hdr *hdr, fmode_t mode)
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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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if (hdr->interface_id != 'S')
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@ -444,16 +441,16 @@ static int sg_io(struct scsi_device *sdev, struct sg_io_hdr *hdr, fmode_t mode)
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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 > BLK_MAX_CDB) {
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req->cmd = kzalloc(hdr->cmd_len, GFP_KERNEL);
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if (!req->cmd)
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goto out_put_request;
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if (hdr->cmd_len > sizeof(scmd->cmnd)) {
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ret = -EINVAL;
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goto out_put_request;
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}
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ret = scsi_fill_sghdr_rq(sdev, rq, hdr, mode);
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if (ret < 0)
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goto out_free_cdb;
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goto out_put_request;
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ret = 0;
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if (hdr->iovec_count) {
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@ -463,7 +460,7 @@ static int sg_io(struct scsi_device *sdev, struct sg_io_hdr *hdr, fmode_t mode)
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ret = import_iovec(rq_data_dir(rq), hdr->dxferp,
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hdr->iovec_count, 0, &iov, &i);
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if (ret < 0)
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goto out_free_cdb;
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goto out_put_request;
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/* SG_IO howto says that the shorter of the two wins */
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iov_iter_truncate(&i, hdr->dxfer_len);
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@ -475,7 +472,7 @@ static int sg_io(struct scsi_device *sdev, struct sg_io_hdr *hdr, fmode_t mode)
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hdr->dxfer_len, GFP_KERNEL);
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if (ret)
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goto out_free_cdb;
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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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@ -488,8 +485,6 @@ static int sg_io(struct scsi_device *sdev, struct sg_io_hdr *hdr, fmode_t mode)
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ret = scsi_complete_sghdr_rq(rq, hdr, bio);
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out_free_cdb:
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scsi_req_free_cmd(req);
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out_put_request:
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blk_mq_free_request(rq);
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return ret;
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@ -530,6 +525,7 @@ static int sg_scsi_ioctl(struct request_queue *q, fmode_t mode,
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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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char *buffer = NULL;
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if (!sic)
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@ -561,6 +557,7 @@ static int sg_scsi_ioctl(struct request_queue *q, fmode_t mode,
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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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@ -568,15 +565,15 @@ static int sg_scsi_ioctl(struct request_queue *q, fmode_t mode,
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* get command and data to send to device, if any
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*/
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err = -EFAULT;
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req->cmd_len = cmdlen;
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if (copy_from_user(req->cmd, sic->data, cmdlen))
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scmd->cmd_len = cmdlen;
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if (copy_from_user(scmd->cmnd, sic->data, cmdlen))
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goto error;
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if (in_len && copy_from_user(buffer, sic->data + cmdlen, in_len))
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goto error;
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err = -EPERM;
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if (!scsi_cmd_allowed(req->cmd, mode))
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if (!scsi_cmd_allowed(scmd->cmnd, mode))
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goto error;
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/* default. possible overridden later */
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@ -214,6 +214,7 @@ int __scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
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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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req = scsi_alloc_request(sdev->request_queue,
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@ -231,8 +232,9 @@ int __scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
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if (ret)
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goto out;
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}
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rq->cmd_len = COMMAND_SIZE(cmd[0]);
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memcpy(rq->cmd, cmd, rq->cmd_len);
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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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req->timeout = timeout;
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req->cmd_flags |= flags;
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@ -1126,9 +1128,9 @@ static void scsi_initialize_rq(struct request *rq)
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struct scsi_cmnd *cmd = blk_mq_rq_to_pdu(rq);
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struct scsi_request *req = &cmd->req;
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memset(req->__cmd, 0, sizeof(req->__cmd));
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req->cmd = req->__cmd;
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req->cmd_len = BLK_MAX_CDB;
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memset(cmd->cmnd, 0, sizeof(cmd->cmnd));
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cmd->cmd_len = MAX_COMMAND_SIZE;
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req->sense_len = 0;
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init_rcu_head(&cmd->rcu);
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@ -1196,8 +1198,6 @@ static blk_status_t scsi_setup_scsi_cmnd(struct scsi_device *sdev,
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memset(&cmd->sdb, 0, sizeof(cmd->sdb));
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}
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cmd->cmd_len = scsi_req(req)->cmd_len;
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cmd->cmnd = scsi_req(req)->cmd;
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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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@ -1567,8 +1567,6 @@ static blk_status_t scsi_prepare_cmd(struct request *req)
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cmd->prot_type = 0;
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cmd->prot_flags = 0;
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cmd->submitter = 0;
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cmd->cmd_len = 0;
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cmd->cmnd = NULL;
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memset(&cmd->sdb, 0, sizeof(cmd->sdb));
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cmd->underflow = 0;
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cmd->transfersize = 0;
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@ -1616,8 +1614,7 @@ static blk_status_t scsi_prepare_cmd(struct request *req)
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return ret;
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}
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cmd->cmnd = scsi_req(req)->cmd = scsi_req(req)->__cmd;
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memset(cmd->cmnd, 0, BLK_MAX_CDB);
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memset(cmd->cmnd, 0, sizeof(cmd->cmnd));
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return scsi_cmd_to_driver(cmd)->init_command(cmd);
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}
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@ -87,7 +87,7 @@ void scmd_printk(const char *level, const struct scsi_cmnd *scmd,
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char *logbuf;
|
||||
size_t off = 0, logbuf_len;
|
||||
|
||||
if (!scmd || !scmd->cmnd)
|
||||
if (!scmd)
|
||||
return;
|
||||
|
||||
logbuf = scsi_log_reserve_buffer(&logbuf_len);
|
||||
@ -183,9 +183,6 @@ void scsi_print_command(struct scsi_cmnd *cmd)
|
||||
char *logbuf;
|
||||
size_t off, logbuf_len;
|
||||
|
||||
if (!cmd->cmnd)
|
||||
return;
|
||||
|
||||
logbuf = scsi_log_reserve_buffer(&logbuf_len);
|
||||
if (!logbuf)
|
||||
return;
|
||||
|
||||
@ -128,7 +128,6 @@ static DEFINE_IDA(sd_index_ida);
|
||||
static DEFINE_MUTEX(sd_ref_mutex);
|
||||
|
||||
static struct kmem_cache *sd_cdb_cache;
|
||||
static mempool_t *sd_cdb_pool;
|
||||
static mempool_t *sd_page_pool;
|
||||
static struct lock_class_key sd_bio_compl_lkclass;
|
||||
|
||||
@ -1075,13 +1074,7 @@ static blk_status_t sd_setup_rw32_cmnd(struct scsi_cmnd *cmd, bool write,
|
||||
sector_t lba, unsigned int nr_blocks,
|
||||
unsigned char flags)
|
||||
{
|
||||
cmd->cmnd = mempool_alloc(sd_cdb_pool, GFP_ATOMIC);
|
||||
if (unlikely(cmd->cmnd == NULL))
|
||||
return BLK_STS_RESOURCE;
|
||||
|
||||
cmd->cmd_len = SD_EXT_CDB_SIZE;
|
||||
memset(cmd->cmnd, 0, cmd->cmd_len);
|
||||
|
||||
cmd->cmnd[0] = VARIABLE_LENGTH_CMD;
|
||||
cmd->cmnd[7] = 0x18; /* Additional CDB len */
|
||||
cmd->cmnd[9] = write ? WRITE_32 : READ_32;
|
||||
@ -1313,17 +1306,9 @@ static blk_status_t sd_init_command(struct scsi_cmnd *cmd)
|
||||
static void sd_uninit_command(struct scsi_cmnd *SCpnt)
|
||||
{
|
||||
struct request *rq = scsi_cmd_to_rq(SCpnt);
|
||||
u8 *cmnd;
|
||||
|
||||
if (rq->rq_flags & RQF_SPECIAL_PAYLOAD)
|
||||
mempool_free(rq->special_vec.bv_page, sd_page_pool);
|
||||
|
||||
if (SCpnt->cmnd != scsi_req(rq)->cmd) {
|
||||
cmnd = SCpnt->cmnd;
|
||||
SCpnt->cmnd = NULL;
|
||||
SCpnt->cmd_len = 0;
|
||||
mempool_free(cmnd, sd_cdb_pool);
|
||||
}
|
||||
}
|
||||
|
||||
static bool sd_need_revalidate(struct block_device *bdev,
|
||||
@ -3819,18 +3804,11 @@ static int __init init_sd(void)
|
||||
goto err_out_class;
|
||||
}
|
||||
|
||||
sd_cdb_pool = mempool_create_slab_pool(SD_MEMPOOL_SIZE, sd_cdb_cache);
|
||||
if (!sd_cdb_pool) {
|
||||
printk(KERN_ERR "sd: can't init extended cdb pool\n");
|
||||
err = -ENOMEM;
|
||||
goto err_out_cache;
|
||||
}
|
||||
|
||||
sd_page_pool = mempool_create_page_pool(SD_MEMPOOL_SIZE, 0);
|
||||
if (!sd_page_pool) {
|
||||
printk(KERN_ERR "sd: can't init discard page pool\n");
|
||||
err = -ENOMEM;
|
||||
goto err_out_ppool;
|
||||
goto err_out_cache;
|
||||
}
|
||||
|
||||
err = scsi_register_driver(&sd_template.gendrv);
|
||||
@ -3842,9 +3820,6 @@ static int __init init_sd(void)
|
||||
err_out_driver:
|
||||
mempool_destroy(sd_page_pool);
|
||||
|
||||
err_out_ppool:
|
||||
mempool_destroy(sd_cdb_pool);
|
||||
|
||||
err_out_cache:
|
||||
kmem_cache_destroy(sd_cdb_cache);
|
||||
|
||||
@ -3868,7 +3843,6 @@ static void __exit exit_sd(void)
|
||||
SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n"));
|
||||
|
||||
scsi_unregister_driver(&sd_template.gendrv);
|
||||
mempool_destroy(sd_cdb_pool);
|
||||
mempool_destroy(sd_page_pool);
|
||||
kmem_cache_destroy(sd_cdb_cache);
|
||||
|
||||
|
||||
@ -818,7 +818,6 @@ sg_common_write(Sg_fd * sfp, Sg_request * srp,
|
||||
}
|
||||
if (atomic_read(&sdp->detaching)) {
|
||||
if (srp->bio) {
|
||||
scsi_req_free_cmd(scsi_req(srp->rq));
|
||||
blk_mq_free_request(srp->rq);
|
||||
srp->rq = NULL;
|
||||
}
|
||||
@ -1393,7 +1392,6 @@ sg_rq_end_io(struct request *rq, blk_status_t status)
|
||||
* blk_rq_unmap_user() can be called from user context.
|
||||
*/
|
||||
srp->rq = NULL;
|
||||
scsi_req_free_cmd(scsi_req(rq));
|
||||
blk_mq_free_request(rq);
|
||||
|
||||
write_lock_irqsave(&sfp->rq_list_lock, iflags);
|
||||
@ -1738,18 +1736,12 @@ sg_start_req(Sg_request *srp, unsigned char *cmd)
|
||||
struct request_queue *q = sfp->parentdp->device->request_queue;
|
||||
struct rq_map_data *md, map_data;
|
||||
int rw = hp->dxfer_direction == SG_DXFER_TO_DEV ? WRITE : READ;
|
||||
unsigned char *long_cmdp = NULL;
|
||||
struct scsi_cmnd *scmd;
|
||||
|
||||
SCSI_LOG_TIMEOUT(4, sg_printk(KERN_INFO, sfp->parentdp,
|
||||
"sg_start_req: dxfer_len=%d\n",
|
||||
dxfer_len));
|
||||
|
||||
if (hp->cmd_len > BLK_MAX_CDB) {
|
||||
long_cmdp = kzalloc(hp->cmd_len, GFP_KERNEL);
|
||||
if (!long_cmdp)
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
/*
|
||||
* NOTE
|
||||
*
|
||||
@ -1763,16 +1755,18 @@ sg_start_req(Sg_request *srp, unsigned char *cmd)
|
||||
*/
|
||||
rq = scsi_alloc_request(q, hp->dxfer_direction == SG_DXFER_TO_DEV ?
|
||||
REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
|
||||
if (IS_ERR(rq)) {
|
||||
kfree(long_cmdp);
|
||||
if (IS_ERR(rq))
|
||||
return PTR_ERR(rq);
|
||||
}
|
||||
scmd = blk_mq_rq_to_pdu(rq);
|
||||
req = scsi_req(rq);
|
||||
|
||||
if (hp->cmd_len > BLK_MAX_CDB)
|
||||
req->cmd = long_cmdp;
|
||||
memcpy(req->cmd, cmd, hp->cmd_len);
|
||||
req->cmd_len = hp->cmd_len;
|
||||
if (hp->cmd_len > sizeof(scmd->cmnd)) {
|
||||
blk_mq_free_request(rq);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
memcpy(scmd->cmnd, cmd, hp->cmd_len);
|
||||
scmd->cmd_len = hp->cmd_len;
|
||||
|
||||
srp->rq = rq;
|
||||
rq->end_io_data = srp;
|
||||
@ -1865,10 +1859,8 @@ sg_finish_rem_req(Sg_request *srp)
|
||||
if (srp->bio)
|
||||
ret = blk_rq_unmap_user(srp->bio);
|
||||
|
||||
if (srp->rq) {
|
||||
scsi_req_free_cmd(scsi_req(srp->rq));
|
||||
if (srp->rq)
|
||||
blk_mq_free_request(srp->rq);
|
||||
}
|
||||
|
||||
if (srp->res_used)
|
||||
sg_unlink_reserve(sfp, srp);
|
||||
|
||||
@ -966,6 +966,7 @@ static int sr_read_cdda_bpc(struct cdrom_device_info *cdi, void __user *ubuf,
|
||||
struct gendisk *disk = cdi->disk;
|
||||
u32 len = nr * CD_FRAMESIZE_RAW;
|
||||
struct scsi_request *req;
|
||||
struct scsi_cmnd *scmd;
|
||||
struct request *rq;
|
||||
struct bio *bio;
|
||||
int ret;
|
||||
@ -974,22 +975,23 @@ static int sr_read_cdda_bpc(struct cdrom_device_info *cdi, void __user *ubuf,
|
||||
if (IS_ERR(rq))
|
||||
return PTR_ERR(rq);
|
||||
req = scsi_req(rq);
|
||||
scmd = blk_mq_rq_to_pdu(rq);
|
||||
|
||||
ret = blk_rq_map_user(disk->queue, rq, NULL, ubuf, len, GFP_KERNEL);
|
||||
if (ret)
|
||||
goto out_put_request;
|
||||
|
||||
req->cmd[0] = GPCMD_READ_CD;
|
||||
req->cmd[1] = 1 << 2;
|
||||
req->cmd[2] = (lba >> 24) & 0xff;
|
||||
req->cmd[3] = (lba >> 16) & 0xff;
|
||||
req->cmd[4] = (lba >> 8) & 0xff;
|
||||
req->cmd[5] = lba & 0xff;
|
||||
req->cmd[6] = (nr >> 16) & 0xff;
|
||||
req->cmd[7] = (nr >> 8) & 0xff;
|
||||
req->cmd[8] = nr & 0xff;
|
||||
req->cmd[9] = 0xf8;
|
||||
req->cmd_len = 12;
|
||||
scmd->cmnd[0] = GPCMD_READ_CD;
|
||||
scmd->cmnd[1] = 1 << 2;
|
||||
scmd->cmnd[2] = (lba >> 24) & 0xff;
|
||||
scmd->cmnd[3] = (lba >> 16) & 0xff;
|
||||
scmd->cmnd[4] = (lba >> 8) & 0xff;
|
||||
scmd->cmnd[5] = lba & 0xff;
|
||||
scmd->cmnd[6] = (nr >> 16) & 0xff;
|
||||
scmd->cmnd[7] = (nr >> 8) & 0xff;
|
||||
scmd->cmnd[8] = nr & 0xff;
|
||||
scmd->cmnd[9] = 0xf8;
|
||||
scmd->cmd_len = 12;
|
||||
rq->timeout = 60 * HZ;
|
||||
bio = rq->bio;
|
||||
|
||||
|
||||
@ -472,10 +472,11 @@ static void st_release_request(struct st_request *streq)
|
||||
|
||||
static void st_do_stats(struct scsi_tape *STp, struct request *req)
|
||||
{
|
||||
struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(req);
|
||||
ktime_t now;
|
||||
|
||||
now = ktime_get();
|
||||
if (scsi_req(req)->cmd[0] == WRITE_6) {
|
||||
if (scmd->cmnd[0] == WRITE_6) {
|
||||
now = ktime_sub(now, STp->stats->write_time);
|
||||
atomic64_add(ktime_to_ns(now), &STp->stats->tot_write_time);
|
||||
atomic64_add(ktime_to_ns(now), &STp->stats->tot_io_time);
|
||||
@ -489,7 +490,7 @@ static void st_do_stats(struct scsi_tape *STp, struct request *req)
|
||||
} else
|
||||
atomic64_add(atomic_read(&STp->stats->last_write_size),
|
||||
&STp->stats->write_byte_cnt);
|
||||
} else if (scsi_req(req)->cmd[0] == READ_6) {
|
||||
} else if (scmd->cmnd[0] == READ_6) {
|
||||
now = ktime_sub(now, STp->stats->read_time);
|
||||
atomic64_add(ktime_to_ns(now), &STp->stats->tot_read_time);
|
||||
atomic64_add(ktime_to_ns(now), &STp->stats->tot_io_time);
|
||||
@ -542,12 +543,14 @@ static int st_scsi_execute(struct st_request *SRpnt, const unsigned char *cmd,
|
||||
struct rq_map_data *mdata = &SRpnt->stp->buffer->map_data;
|
||||
int err = 0;
|
||||
struct scsi_tape *STp = SRpnt->stp;
|
||||
struct scsi_cmnd *scmd;
|
||||
|
||||
req = scsi_alloc_request(SRpnt->stp->device->request_queue,
|
||||
data_direction == DMA_TO_DEVICE ?
|
||||
REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
|
||||
if (IS_ERR(req))
|
||||
return PTR_ERR(req);
|
||||
scmd = blk_mq_rq_to_pdu(req);
|
||||
rq = scsi_req(req);
|
||||
req->rq_flags |= RQF_QUIET;
|
||||
|
||||
@ -574,9 +577,8 @@ static int st_scsi_execute(struct st_request *SRpnt, const unsigned char *cmd,
|
||||
}
|
||||
|
||||
SRpnt->bio = req->bio;
|
||||
rq->cmd_len = COMMAND_SIZE(cmd[0]);
|
||||
memset(rq->cmd, 0, BLK_MAX_CDB);
|
||||
memcpy(rq->cmd, cmd, rq->cmd_len);
|
||||
scmd->cmd_len = COMMAND_SIZE(cmd[0]);
|
||||
memcpy(scmd->cmnd, cmd, scmd->cmd_len);
|
||||
req->timeout = timeout;
|
||||
rq->retries = retries;
|
||||
req->end_io_data = SRpnt;
|
||||
|
||||
@ -666,15 +666,14 @@ static void ufshpb_execute_umap_req(struct ufshpb_lu *hpb,
|
||||
struct ufshpb_req *umap_req,
|
||||
struct ufshpb_region *rgn)
|
||||
{
|
||||
struct request *req;
|
||||
struct scsi_request *rq;
|
||||
struct request *req = umap_req->req;
|
||||
struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(req);
|
||||
|
||||
req = umap_req->req;
|
||||
req->timeout = 0;
|
||||
req->end_io_data = (void *)umap_req;
|
||||
rq = scsi_req(req);
|
||||
ufshpb_set_unmap_cmd(rq->cmd, rgn);
|
||||
rq->cmd_len = HPB_WRITE_BUFFER_CMD_LENGTH;
|
||||
req->end_io_data = umap_req;
|
||||
|
||||
ufshpb_set_unmap_cmd(scmd->cmnd, rgn);
|
||||
scmd->cmd_len = HPB_WRITE_BUFFER_CMD_LENGTH;
|
||||
|
||||
blk_execute_rq_nowait(req, true, ufshpb_umap_req_compl_fn);
|
||||
|
||||
@ -686,7 +685,7 @@ static int ufshpb_execute_map_req(struct ufshpb_lu *hpb,
|
||||
{
|
||||
struct request_queue *q;
|
||||
struct request *req;
|
||||
struct scsi_request *rq;
|
||||
struct scsi_cmnd *scmd;
|
||||
int mem_size = hpb->srgn_mem_size;
|
||||
int ret = 0;
|
||||
int i;
|
||||
@ -709,14 +708,13 @@ static int ufshpb_execute_map_req(struct ufshpb_lu *hpb,
|
||||
|
||||
req->end_io_data = map_req;
|
||||
|
||||
rq = scsi_req(req);
|
||||
|
||||
if (unlikely(last))
|
||||
mem_size = hpb->last_srgn_entries * HPB_ENTRY_SIZE;
|
||||
|
||||
ufshpb_set_read_buf_cmd(rq->cmd, map_req->rb.rgn_idx,
|
||||
scmd = blk_mq_rq_to_pdu(req);
|
||||
ufshpb_set_read_buf_cmd(scmd->cmnd, map_req->rb.rgn_idx,
|
||||
map_req->rb.srgn_idx, mem_size);
|
||||
rq->cmd_len = HPB_READ_BUFFER_CMD_LENGTH;
|
||||
scmd->cmd_len = HPB_READ_BUFFER_CMD_LENGTH;
|
||||
|
||||
blk_execute_rq_nowait(req, true, ufshpb_map_req_compl_fn);
|
||||
|
||||
|
||||
@ -961,6 +961,7 @@ pscsi_execute_cmd(struct se_cmd *cmd)
|
||||
struct scatterlist *sgl = cmd->t_data_sg;
|
||||
u32 sgl_nents = cmd->t_data_nents;
|
||||
struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev);
|
||||
struct scsi_cmnd *scmd;
|
||||
struct request *req;
|
||||
sense_reason_t ret;
|
||||
|
||||
@ -978,12 +979,15 @@ pscsi_execute_cmd(struct se_cmd *cmd)
|
||||
|
||||
req->end_io = pscsi_req_done;
|
||||
req->end_io_data = cmd;
|
||||
scsi_req(req)->cmd_len = scsi_command_size(cmd->t_task_cdb);
|
||||
if (scsi_req(req)->cmd_len > BLK_MAX_CDB) {
|
||||
|
||||
scmd = blk_mq_rq_to_pdu(req);
|
||||
scmd->cmd_len = scsi_command_size(cmd->t_task_cdb);
|
||||
if (scmd->cmd_len > sizeof(scmd->cmnd)) {
|
||||
ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
|
||||
goto fail_put_request;
|
||||
}
|
||||
memcpy(scsi_req(req)->cmd, cmd->t_task_cdb, scsi_req(req)->cmd_len);
|
||||
memcpy(scmd->cmnd, cmd->t_task_cdb, scmd->cmd_len);
|
||||
|
||||
if (pdv->pdv_sd->type == TYPE_DISK ||
|
||||
pdv->pdv_sd->type == TYPE_ZBC)
|
||||
req->timeout = PS_TIMEOUT_DISK;
|
||||
@ -991,7 +995,7 @@ pscsi_execute_cmd(struct se_cmd *cmd)
|
||||
req->timeout = PS_TIMEOUT_OTHER;
|
||||
scsi_req(req)->retries = PS_RETRY;
|
||||
|
||||
cmd->priv = scsi_req(req)->cmd;
|
||||
cmd->priv = scmd->cmnd;
|
||||
|
||||
blk_execute_rq_nowait(req, cmd->sam_task_attr == TCM_HEAD_TAG,
|
||||
pscsi_req_done);
|
||||
|
||||
@ -177,7 +177,6 @@ static void cypress_atacb_passthrough(struct scsi_cmnd *srb, struct us_data *us)
|
||||
* but reading register selected in srb->cmnd[4]
|
||||
*/
|
||||
srb->cmd_len = 16;
|
||||
srb->cmnd = ses.cmnd;
|
||||
srb->cmnd[2] = 1;
|
||||
|
||||
usb_stor_transparent_scsi_command(srb, us);
|
||||
|
||||
@ -326,7 +326,7 @@ struct isd200_info {
|
||||
|
||||
/* maximum number of LUNs supported */
|
||||
unsigned char MaxLUNs;
|
||||
unsigned char cmnd[BLK_MAX_CDB];
|
||||
unsigned char cmnd[MAX_COMMAND_SIZE];
|
||||
struct scsi_cmnd srb;
|
||||
struct scatterlist sg;
|
||||
};
|
||||
@ -485,7 +485,7 @@ static int isd200_action( struct us_data *us, int action,
|
||||
int status;
|
||||
|
||||
memset(&ata, 0, sizeof(ata));
|
||||
srb->cmnd = info->cmnd;
|
||||
memcpy(srb->cmnd, info->cmnd, MAX_COMMAND_SIZE);
|
||||
srb->device = &srb_dev;
|
||||
|
||||
ata.generic.SignatureByte0 = info->ConfigData.ATAMajorCommand;
|
||||
|
||||
@ -28,9 +28,6 @@ struct scsi_driver;
|
||||
* supports without specifying a cmd_len by ULD's
|
||||
*/
|
||||
#define MAX_COMMAND_SIZE 16
|
||||
#if (MAX_COMMAND_SIZE > BLK_MAX_CDB)
|
||||
# error MAX_COMMAND_SIZE can not be bigger than BLK_MAX_CDB
|
||||
#endif
|
||||
|
||||
struct scsi_data_buffer {
|
||||
struct sg_table table;
|
||||
@ -100,9 +97,7 @@ struct scsi_cmnd {
|
||||
unsigned short cmd_len;
|
||||
enum dma_data_direction sc_data_direction;
|
||||
|
||||
/* These elements define the operation we are about to perform */
|
||||
unsigned char *cmnd;
|
||||
|
||||
unsigned char cmnd[32]; /* SCSI CDB */
|
||||
|
||||
/* These elements define the operation we ultimately want to perform */
|
||||
struct scsi_data_buffer sdb;
|
||||
|
||||
@ -38,10 +38,8 @@ struct scsi_eh_save {
|
||||
unsigned underflow;
|
||||
unsigned char cmd_len;
|
||||
unsigned char prot_op;
|
||||
unsigned char *cmnd;
|
||||
unsigned char cmnd[32];
|
||||
struct scsi_data_buffer sdb;
|
||||
/* new command support */
|
||||
unsigned char eh_cmnd[BLK_MAX_CDB];
|
||||
struct scatterlist sense_sgl;
|
||||
};
|
||||
|
||||
|
||||
@ -4,12 +4,7 @@
|
||||
|
||||
#include <linux/blk-mq.h>
|
||||
|
||||
#define BLK_MAX_CDB 16
|
||||
|
||||
struct scsi_request {
|
||||
unsigned char __cmd[BLK_MAX_CDB];
|
||||
unsigned char *cmd;
|
||||
unsigned short cmd_len;
|
||||
int result;
|
||||
unsigned int sense_len;
|
||||
unsigned int resid_len; /* residual count */
|
||||
@ -22,10 +17,4 @@ static inline struct scsi_request *scsi_req(struct request *rq)
|
||||
return blk_mq_rq_to_pdu(rq);
|
||||
}
|
||||
|
||||
static inline void scsi_req_free_cmd(struct scsi_request *req)
|
||||
{
|
||||
if (req->cmd != req->__cmd)
|
||||
kfree(req->cmd);
|
||||
}
|
||||
|
||||
#endif /* _SCSI_SCSI_REQUEST_H */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user