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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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2
fs/nfsd/blocklayout.c
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@ -223,7 +223,7 @@ static int nfsd4_scsi_identify_device(struct block_device *bdev,
if (!buf)
return -ENOMEM;
rq = blk_get_request(q, READ, GFP_KERNEL);
rq = blk_get_request(q, REQ_OP_SCSI_IN, GFP_KERNEL);
if (IS_ERR(rq)) {
error = -ENOMEM;
goto out_free_buf;