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 <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>

...

This commit is contained in:

Christoph Hellwig 2017-01-31 16:57:31 +01:00 • committed by Jens Axboe

parent 2f5a8e80f7

commit aebf526b53

53 changed files with 338 additions and 326 deletions

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7

include/linux/blk_types.h

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22

include/linux/blkdev.h

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14

include/linux/ide.h

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