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block: fold cmd_type into the REQ_OP_ space

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Instead of keeping two levels of indirection for requests types, fold it
all into the operations.  The little caveat here is that previously
cmd_type only applied to struct request, while the request and bio op
fields were set to plain REQ_OP_READ/WRITE even for passthrough
operations.

Instead this patch adds new REQ_OP_* for SCSI passthrough and driver
private requests, althought it has to add two for each so that we
can communicate the data in/out nature of the request.

Signed-off-by: Christoph Hellwig <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Christoph Hellwig 2017-01-31 16:57:31 +01:00 • committed by Jens Axboe
commit aebf526b53
53 changed files with 338 additions and 326 deletions
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13
drivers/mtd/mtd_blkdevs.c
View file

@ -84,9 +84,6 @@ static int do_blktrans_request(struct mtd_blktrans_ops *tr,
nsect = blk_rq_cur_bytes(req) >> tr->blkshift;
buf = bio_data(req->bio);
if (req->cmd_type != REQ_TYPE_FS)
return -EIO;
if (req_op(req) == REQ_OP_FLUSH)
return tr->flush(dev);
@ -94,16 +91,16 @@ static int do_blktrans_request(struct mtd_blktrans_ops *tr,
get_capacity(req->rq_disk))
return -EIO;
if (req_op(req) == REQ_OP_DISCARD)
switch (req_op(req)) {
case REQ_OP_DISCARD:
return tr->discard(dev, block, nsect);
if (rq_data_dir(req) == READ) {
case REQ_OP_READ:
for (; nsect > 0; nsect--, block++, buf += tr->blksize)
if (tr->readsect(dev, block, buf))
return -EIO;
rq_flush_dcache_pages(req);
return 0;
} else {
case REQ_OP_WRITE:
if (!tr->writesect)
return -EIO;
@ -112,6 +109,8 @@ static int do_blktrans_request(struct mtd_blktrans_ops *tr,
if (tr->writesect(dev, block, buf))
return -EIO;
return 0;
default:
return -EIO;
}
}

15
drivers/mtd/ubi/block.c
View file

@ -323,16 +323,15 @@ static int ubiblock_queue_rq(struct blk_mq_hw_ctx *hctx,
struct ubiblock *dev = hctx->queue->queuedata;
struct ubiblock_pdu *pdu = blk_mq_rq_to_pdu(req);
if (req->cmd_type != REQ_TYPE_FS)
switch (req_op(req)) {
case REQ_OP_READ:
ubi_sgl_init(&pdu->usgl);
queue_work(dev->wq, &pdu->work);
return BLK_MQ_RQ_QUEUE_OK;
default:
return BLK_MQ_RQ_QUEUE_ERROR;
}
if (rq_data_dir(req) != READ)
return BLK_MQ_RQ_QUEUE_ERROR; /* Write not implemented */
ubi_sgl_init(&pdu->usgl);
queue_work(dev->wq, &pdu->work);
return BLK_MQ_RQ_QUEUE_OK;
}
static int ubiblock_init_request(void *data, struct request *req,