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block: Introduce blk_rq_is_seq_zoned_write()

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Introduce the function blk_rq_is_seq_zoned_write(). This function will
be used in later patches to preserve the order of zoned writes that
require write serialization.

This patch includes an optimization: instead of using
rq->q->disk->part0->bd_queue to check whether or not the queue is
associated with a zoned block device, use rq->q->disk->queue.

Cc: Christoph Hellwig <hch@lst.de>
Cc: Damien Le Moal <dlemoal@kernel.org>
Cc: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20230517174230.897144-6-bvanassche@acm.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Bart Van Assche 2023-05-17 10:42:23 -07:00 committed by Jens Axboe
parent a370798201
commit 19821fee3e
2 changed files with 18 additions and 4 deletions
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5
block/blk-zoned.c
View File

@ -60,10 +60,7 @@ bool blk_req_needs_zone_write_lock(struct request *rq)
if (!rq->q->disk->seq_zones_wlock)
return false;
if (bdev_op_is_zoned_write(rq->q->disk->part0, req_op(rq)))
return blk_rq_zone_is_seq(rq);
return false;
return blk_rq_is_seq_zoned_write(rq);
}
EXPORT_SYMBOL_GPL(blk_req_needs_zone_write_lock);

17
include/linux/blk-mq.h
View File

@ -1164,6 +1164,18 @@ static inline unsigned int blk_rq_zone_is_seq(struct request *rq)
return disk_zone_is_seq(rq->q->disk, blk_rq_pos(rq));
}
/**
* blk_rq_is_seq_zoned_write() - Check if @rq requires write serialization.
* @rq: Request to examine.
*
* Note: REQ_OP_ZONE_APPEND requests do not require serialization.
*/
static inline bool blk_rq_is_seq_zoned_write(struct request *rq)
{
return op_needs_zoned_write_locking(req_op(rq)) &&
blk_rq_zone_is_seq(rq);
}
bool blk_req_needs_zone_write_lock(struct request *rq);
bool blk_req_zone_write_trylock(struct request *rq);
void __blk_req_zone_write_lock(struct request *rq);
@ -1194,6 +1206,11 @@ static inline bool blk_req_can_dispatch_to_zone(struct request *rq)
return !blk_req_zone_is_write_locked(rq);
}
#else /* CONFIG_BLK_DEV_ZONED */
static inline bool blk_rq_is_seq_zoned_write(struct request *rq)
{
return false;
}
static inline bool blk_req_needs_zone_write_lock(struct request *rq)
{
return false;