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authorChristoph Hellwig <hch@lst.de>2017-01-27 11:46:29 +0300
committerJens Axboe <axboe@fb.com>2017-01-28 01:08:35 +0300
commit82ed4db499b8598f16f8871261bff088d6b0597f (patch)
treee1cc0a433bf5ae2b9723837291617bdfeeb61816 /drivers/scsi/st.c
parent8ae94eb65be9425af4d57a4f4cfebfdf03081e93 (diff)
downloadlinux-82ed4db499b8598f16f8871261bff088d6b0597f.tar.xz
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 <hch@lst.de> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/scsi/st.c')
-rw-r--r--drivers/scsi/st.c22
1 files changed, 12 insertions, 10 deletions
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;