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block: Define zoned block device operations 

Define REQ_OP_ZONE_REPORT and REQ_OP_ZONE_RESET for handling zones of
host-managed and host-aware zoned block devices. With with these two
new operations, the total number of operations defined reaches 8 and
still fits with the 3 bits definition of REQ_OP_BITS.

Signed-off-by: Shaun Tancheff <shaun.tancheff@seagate.com>
Signed-off-by: Damien Le Moal <damien.lemoal@hgst.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Shaun Tancheff 2016-10-18 15:40:32 +09:00 committed by Jens Axboe
parent 987b3b26eb
commit 2d253440b5
2 changed files with 6 additions and 0 deletions
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4
block/blk-core.c
View File

@ -1941,6 +1941,10 @@ generic_make_request_checks(struct bio *bio)
case REQ_OP_WRITE_SAME:
if (!bdev_write_same(bio->bi_bdev))
goto not_supported;
case REQ_OP_ZONE_REPORT:
case REQ_OP_ZONE_RESET:
if (!bdev_is_zoned(bio->bi_bdev))
goto not_supported;
break;
default:
break;

2
include/linux/blk_types.h
View File

@ -243,6 +243,8 @@ enum req_op {
REQ_OP_SECURE_ERASE, /* request to securely erase sectors */
REQ_OP_WRITE_SAME, /* write same block many times */
REQ_OP_FLUSH, /* request for cache flush */
REQ_OP_ZONE_REPORT, /* Get zone information */
REQ_OP_ZONE_RESET, /* Reset a zone write pointer */
};
#define REQ_OP_BITS 3