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>

diff --git a/block/blk-core.c b/block/blk-core.c
index 14d7c0740dc07aa82e6d85b721daa5a7045e14f7..e4eda5d2aa56175ea5b58048d02d5f339bcc334a 100644 (file)
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -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;

diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index cd395ecec99d0151f6caf405cb5653342b397182..dd50dce89a8091865698926daeff6f3fdb80adab 100644 (file)
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -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