From ce70fd9a551af7424a7dace2a1ba05a7de8eae27 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 24 Feb 2022 18:55:47 +0100 Subject: 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 Reviewed-by: John Garry Signed-off-by: Christoph Hellwig Signed-off-by: Martin K. Petersen --- drivers/block/pktcdvd.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'drivers/block/pktcdvd.c') diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c index 2b6b70a39e76..42c284b2d7f9 100644 --- a/drivers/block/pktcdvd.c +++ b/drivers/block/pktcdvd.c @@ -693,6 +693,7 @@ static void pkt_rbtree_insert(struct pktcdvd_device *pd, struct pkt_rb_node *nod static int pkt_generic_packet(struct pktcdvd_device *pd, struct packet_command *cgc) { struct request_queue *q = bdev_get_queue(pd->bdev); + struct scsi_cmnd *scmd; struct request *rq; int ret = 0; @@ -700,6 +701,7 @@ static int pkt_generic_packet(struct pktcdvd_device *pd, struct packet_command * REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0); if (IS_ERR(rq)) return PTR_ERR(rq); + scmd = blk_mq_rq_to_pdu(rq); if (cgc->buflen) { ret = blk_rq_map_kern(q, rq, cgc->buffer, cgc->buflen, @@ -708,8 +710,8 @@ static int pkt_generic_packet(struct pktcdvd_device *pd, struct packet_command * goto out; } - scsi_req(rq)->cmd_len = COMMAND_SIZE(cgc->cmd[0]); - memcpy(scsi_req(rq)->cmd, cgc->cmd, CDROM_PACKET_SIZE); + scmd->cmd_len = COMMAND_SIZE(cgc->cmd[0]); + memcpy(scmd->cmnd, cgc->cmd, CDROM_PACKET_SIZE); rq->timeout = 60*HZ; if (cgc->quiet) -- cgit v1.2.3 From dbb4c84d87af7416bb7e35f8e6dd8d87d5f221d4 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 24 Feb 2022 18:55:50 +0100 Subject: scsi: core: Move the result field from struct scsi_request to struct scsi_cmnd Prepare for removing the scsi_request structure by moving the result field to struct scsi_cmnd. Link: https://lore.kernel.org/r/20220224175552.988286-7-hch@lst.de Reviewed-by: Bart Van Assche Reviewed-by: John Garry Signed-off-by: Christoph Hellwig Signed-off-by: Martin K. Petersen --- drivers/block/pktcdvd.c | 2 +- drivers/scsi/scsi_bsg.c | 8 +++----- drivers/scsi/scsi_ioctl.c | 9 ++++----- drivers/scsi/scsi_lib.c | 15 ++++----------- drivers/scsi/sg.c | 3 +-- drivers/scsi/sr.c | 2 +- drivers/scsi/st.c | 7 +++---- drivers/target/target_core_pscsi.c | 9 ++++----- include/scsi/scsi_request.h | 1 - 9 files changed, 21 insertions(+), 35 deletions(-) (limited to 'drivers/block/pktcdvd.c') diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c index 42c284b2d7f9..aca94ebf4947 100644 --- a/drivers/block/pktcdvd.c +++ b/drivers/block/pktcdvd.c @@ -718,7 +718,7 @@ static int pkt_generic_packet(struct pktcdvd_device *pd, struct packet_command * rq->rq_flags |= RQF_QUIET; blk_execute_rq(rq, false); - if (scsi_req(rq)->result) + if (scmd->result) ret = -EIO; out: blk_mq_free_request(rq); diff --git a/drivers/scsi/scsi_bsg.c b/drivers/scsi/scsi_bsg.c index 4c697d0ddf1d..8039c3c11a6e 100644 --- a/drivers/scsi/scsi_bsg.c +++ b/drivers/scsi/scsi_bsg.c @@ -12,7 +12,6 @@ static int scsi_bsg_sg_io_fn(struct request_queue *q, struct sg_io_v4 *hdr, fmode_t mode, unsigned int timeout) { - struct scsi_request *sreq; struct scsi_cmnd *scmd; struct request *rq; struct bio *bio; @@ -33,7 +32,6 @@ static int scsi_bsg_sg_io_fn(struct request_queue *q, struct sg_io_v4 *hdr, rq->timeout = timeout; ret = -ENOMEM; - sreq = scsi_req(rq); scmd = blk_mq_rq_to_pdu(rq); scmd->cmd_len = hdr->request_len; if (scmd->cmd_len > sizeof(scmd->cmnd)) { @@ -66,10 +64,10 @@ static int scsi_bsg_sg_io_fn(struct request_queue *q, struct sg_io_v4 *hdr, /* * fill in all the output members */ - hdr->device_status = sreq->result & 0xff; - hdr->transport_status = host_byte(sreq->result); + hdr->device_status = scmd->result & 0xff; + hdr->transport_status = host_byte(scmd->result); hdr->driver_status = 0; - if (scsi_status_is_check_condition(sreq->result)) + if (scsi_status_is_check_condition(scmd->result)) hdr->driver_status = DRIVER_SENSE; hdr->info = 0; if (hdr->device_status || hdr->transport_status || hdr->driver_status) diff --git a/drivers/scsi/scsi_ioctl.c b/drivers/scsi/scsi_ioctl.c index b066fdd6305a..04b7c70d1dba 100644 --- a/drivers/scsi/scsi_ioctl.c +++ b/drivers/scsi/scsi_ioctl.c @@ -370,16 +370,15 @@ static int scsi_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr, struct bio *bio) { struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq); - struct scsi_request *req = scsi_req(rq); int r, ret = 0; /* * fill in all the output members */ - hdr->status = req->result & 0xff; - hdr->masked_status = status_byte(req->result); + hdr->status = scmd->result & 0xff; + hdr->masked_status = status_byte(scmd->result); hdr->msg_status = COMMAND_COMPLETE; - hdr->host_status = host_byte(req->result); + hdr->host_status = host_byte(scmd->result); hdr->driver_status = 0; if (scsi_status_is_check_condition(hdr->status)) hdr->driver_status = DRIVER_SENSE; @@ -611,7 +610,7 @@ static int sg_scsi_ioctl(struct request_queue *q, fmode_t mode, blk_execute_rq(rq, false); - err = req->result & 0xff; /* only 8 bit SCSI status */ + err = scmd->result & 0xff; /* only 8 bit SCSI status */ if (err) { if (scmd->sense_len && scmd->sense_buffer) { /* limit sense len for backward compatibility */ diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index a9d8e80032a3..0c41e023a3ce 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -261,7 +261,7 @@ int __scsi_execute(struct scsi_device *sdev, const unsigned char *cmd, if (sshdr) scsi_normalize_sense(scmd->sense_buffer, scmd->sense_len, sshdr); - ret = rq->result; + ret = scmd->result; out: blk_mq_free_request(req); @@ -959,13 +959,6 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes) if (unlikely(result)) /* a nz result may or may not be an error */ result = scsi_io_completion_nz_result(cmd, result, &blk_stat); - if (unlikely(blk_rq_is_passthrough(req))) { - /* - * scsi_result_to_blk_status may have reset the host_byte - */ - scsi_req(req)->result = cmd->result; - } - /* * Next deal with any sectors which we were able to correctly * handle. @@ -1779,15 +1772,15 @@ out_put_budget: ret = BLK_STS_DEV_RESOURCE; break; case BLK_STS_AGAIN: - scsi_req(req)->result = DID_BUS_BUSY << 16; + cmd->result = DID_BUS_BUSY << 16; if (req->rq_flags & RQF_DONTPREP) scsi_mq_uninit_cmd(cmd); break; default: if (unlikely(!scsi_device_online(sdev))) - scsi_req(req)->result = DID_NO_CONNECT << 16; + cmd->result = DID_NO_CONNECT << 16; else - scsi_req(req)->result = DID_ERROR << 16; + cmd->result = DID_ERROR << 16; /* * Make sure to release all allocated resources when * we hit an error, as we will never see this command diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c index 3eaabfb315e0..26a753521cb2 100644 --- a/drivers/scsi/sg.c +++ b/drivers/scsi/sg.c @@ -1325,7 +1325,6 @@ sg_rq_end_io(struct request *rq, blk_status_t status) { struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq); struct sg_request *srp = rq->end_io_data; - struct scsi_request *req = scsi_req(rq); Sg_device *sdp; Sg_fd *sfp; unsigned long iflags; @@ -1345,7 +1344,7 @@ sg_rq_end_io(struct request *rq, blk_status_t status) pr_info("%s: device detaching\n", __func__); sense = scmd->sense_buffer; - result = req->result; + result = scmd->result; resid = scmd->resid_len; SCSI_LOG_TIMEOUT(4, sg_printk(KERN_INFO, sdp, diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c index 1d19dd13d7f0..494d00b05f53 100644 --- a/drivers/scsi/sr.c +++ b/drivers/scsi/sr.c @@ -996,7 +996,7 @@ static int sr_read_cdda_bpc(struct cdrom_device_info *cdi, void __user *ubuf, bio = rq->bio; blk_execute_rq(rq, false); - if (scsi_req(rq)->result) { + if (scmd->result) { struct scsi_sense_hdr sshdr; scsi_normalize_sense(scmd->sense_buffer, scmd->sense_len, diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c index 0546d2c84ad1..c8533ca225bc 100644 --- a/drivers/scsi/st.c +++ b/drivers/scsi/st.c @@ -481,7 +481,7 @@ static void st_do_stats(struct scsi_tape *STp, struct request *req) atomic64_add(ktime_to_ns(now), &STp->stats->tot_write_time); atomic64_add(ktime_to_ns(now), &STp->stats->tot_io_time); atomic64_inc(&STp->stats->write_cnt); - if (scsi_req(req)->result) { + if (scmd->result) { atomic64_add(atomic_read(&STp->stats->last_write_size) - STp->buffer->cmdstat.residual, &STp->stats->write_byte_cnt); @@ -495,7 +495,7 @@ static void st_do_stats(struct scsi_tape *STp, struct request *req) atomic64_add(ktime_to_ns(now), &STp->stats->tot_read_time); atomic64_add(ktime_to_ns(now), &STp->stats->tot_io_time); atomic64_inc(&STp->stats->read_cnt); - if (scsi_req(req)->result) { + if (scmd->result) { atomic64_add(atomic_read(&STp->stats->last_read_size) - STp->buffer->cmdstat.residual, &STp->stats->read_byte_cnt); @@ -516,11 +516,10 @@ static void st_scsi_execute_end(struct request *req, blk_status_t status) { struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(req); struct st_request *SRpnt = req->end_io_data; - struct scsi_request *rq = scsi_req(req); struct scsi_tape *STp = SRpnt->stp; struct bio *tmp; - STp->buffer->cmdstat.midlevel_result = SRpnt->result = rq->result; + STp->buffer->cmdstat.midlevel_result = SRpnt->result = scmd->result; STp->buffer->cmdstat.residual = scmd->resid_len; st_do_stats(STp, req); diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c index d5828da3d392..5b23a0ff905e 100644 --- a/drivers/target/target_core_pscsi.c +++ b/drivers/target/target_core_pscsi.c @@ -1032,25 +1032,24 @@ static void pscsi_req_done(struct request *req, blk_status_t status) { struct se_cmd *cmd = req->end_io_data; struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(req); - int result = scsi_req(req)->result; - enum sam_status scsi_status = result & 0xff; + enum sam_status scsi_status = scmd->result & 0xff; u8 *cdb = cmd->priv; if (scsi_status != SAM_STAT_GOOD) { pr_debug("PSCSI Status Byte exception at cmd: %p CDB:" - " 0x%02x Result: 0x%08x\n", cmd, cdb[0], result); + " 0x%02x Result: 0x%08x\n", cmd, cdb[0], scmd->result); } pscsi_complete_cmd(cmd, scsi_status, scmd->sense_buffer); - switch (host_byte(result)) { + switch (host_byte(scmd->result)) { case DID_OK: target_complete_cmd_with_length(cmd, scsi_status, cmd->data_length - scmd->resid_len); break; default: pr_debug("PSCSI Host Byte exception at cmd: %p CDB:" - " 0x%02x Result: 0x%08x\n", cmd, cdb[0], result); + " 0x%02x Result: 0x%08x\n", cmd, cdb[0], scmd->result); target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION); break; } diff --git a/include/scsi/scsi_request.h b/include/scsi/scsi_request.h index 74be75336a54..929c7bd5c72f 100644 --- a/include/scsi/scsi_request.h +++ b/include/scsi/scsi_request.h @@ -5,7 +5,6 @@ #include struct scsi_request { - int result; int retries; }; -- cgit v1.2.3