From 82ed4db499b8598f16f8871261bff088d6b0597f Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 27 Jan 2017 09:46:29 +0100 Subject: block: split scsi_request out of struct request And require all drivers that want to support BLOCK_PC to allocate it as the first thing of their private data. To support this the legacy IDE and BSG code is switched to set cmd_size on their queues to let the block layer allocate the additional space. Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe --- drivers/scsi/st.c | 22 ++++++++++++---------- 1 file changed, 12 insertions(+), 10 deletions(-) (limited to 'drivers/scsi/st.c') diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c index 5f35b863e1a7..4af900100a24 100644 --- a/drivers/scsi/st.c +++ b/drivers/scsi/st.c @@ -475,7 +475,7 @@ static void st_do_stats(struct scsi_tape *STp, struct request *req) ktime_t now; now = ktime_get(); - if (req->cmd[0] == WRITE_6) { + if (scsi_req(req)->cmd[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 +489,7 @@ 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 (req->cmd[0] == READ_6) { + } else if (scsi_req(req)->cmd[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); @@ -514,15 +514,18 @@ static void st_do_stats(struct scsi_tape *STp, struct request *req) static void st_scsi_execute_end(struct request *req, int uptodate) { 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 = req->errors; - STp->buffer->cmdstat.residual = req->resid_len; + STp->buffer->cmdstat.residual = rq->resid_len; st_do_stats(STp, req); tmp = SRpnt->bio; + if (rq->sense_len) + memcpy(SRpnt->sense, rq->sense, SCSI_SENSE_BUFFERSIZE); if (SRpnt->waiting) complete(SRpnt->waiting); @@ -535,6 +538,7 @@ static int st_scsi_execute(struct st_request *SRpnt, const unsigned char *cmd, int timeout, int retries) { struct request *req; + struct scsi_request *rq; struct rq_map_data *mdata = &SRpnt->stp->buffer->map_data; int err = 0; int write = (data_direction == DMA_TO_DEVICE); @@ -544,8 +548,8 @@ static int st_scsi_execute(struct st_request *SRpnt, const unsigned char *cmd, GFP_KERNEL); if (IS_ERR(req)) return DRIVER_ERROR << 24; - - blk_rq_set_block_pc(req); + rq = scsi_req(req); + scsi_req_init(req); req->rq_flags |= RQF_QUIET; mdata->null_mapped = 1; @@ -571,11 +575,9 @@ static int st_scsi_execute(struct st_request *SRpnt, const unsigned char *cmd, } SRpnt->bio = req->bio; - req->cmd_len = COMMAND_SIZE(cmd[0]); - memset(req->cmd, 0, BLK_MAX_CDB); - memcpy(req->cmd, cmd, req->cmd_len); - req->sense = SRpnt->sense; - req->sense_len = 0; + rq->cmd_len = COMMAND_SIZE(cmd[0]); + memset(rq->cmd, 0, BLK_MAX_CDB); + memcpy(rq->cmd, cmd, rq->cmd_len); req->timeout = timeout; req->retries = retries; req->end_io_data = SRpnt; -- cgit