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| author | Christoph Hellwig | 2017-01-31 16:57:31 +0100 |
|---|---|---|
| committer | Jens Axboe | 2017-01-31 22:00:44 +0100 |
| commit | aebf526b53aea164508730427597d45f3e06b376 (patch) | |
| tree | 98ab726d0f7feb610feee9830246c900c6919eea /drivers/block/nbd.c | |
| parent | ide: don't abuse cmd_type (diff) | |
| download | kernel-qcow2-linux-aebf526b53aea164508730427597d45f3e06b376.tar.gz kernel-qcow2-linux-aebf526b53aea164508730427597d45f3e06b376.tar.xz kernel-qcow2-linux-aebf526b53aea164508730427597d45f3e06b376.zip | |
block: fold cmd_type into the REQ_OP_ space
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>
Diffstat (limited to 'drivers/block/nbd.c')
| -rw-r--r-- | drivers/block/nbd.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c index 8bce1c7c18d5..58296e4427b0 100644 --- a/drivers/block/nbd.c +++ b/drivers/block/nbd.c @@ -271,17 +271,22 @@ static int nbd_send_cmd(struct nbd_device *nbd, struct nbd_cmd *cmd, int index) u32 type; u32 tag = blk_mq_unique_tag(req); - if (req->cmd_type != REQ_TYPE_FS) - return -EIO; - - if (req_op(req) == REQ_OP_DISCARD) + switch (req_op(req)) { + case REQ_OP_DISCARD: type = NBD_CMD_TRIM; - else if (req_op(req) == REQ_OP_FLUSH) + break; + case REQ_OP_FLUSH: type = NBD_CMD_FLUSH; - else if (rq_data_dir(req) == WRITE) + break; + case REQ_OP_WRITE: type = NBD_CMD_WRITE; - else + break; + case REQ_OP_READ: type = NBD_CMD_READ; + break; + default: + return -EIO; + } if (rq_data_dir(req) == WRITE && (nbd->flags & NBD_FLAG_READ_ONLY)) { |