@@ -52,6 +52,18 @@ const char *blk_zone_cond_str(enum blk_zone_cond zone_cond)
}
EXPORT_SYMBOL_GPL(blk_zone_cond_str);
+/**
+ * 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.
+ */
+bool blk_rq_is_seq_zoned_write(struct request *rq)
+{
+ return op_is_zoned_write(req_op(rq)) && blk_rq_zone_is_seq(rq);
+}
+EXPORT_SYMBOL_GPL(blk_rq_is_seq_zoned_write);
+
/*
* Return true if a request is a write requests that needs zone write locking.
*/
@@ -60,10 +72,7 @@ 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);
@@ -1164,6 +1164,7 @@ static inline unsigned int blk_rq_zone_is_seq(struct request *rq)
return disk_zone_is_seq(rq->q->disk, blk_rq_pos(rq));
}
+bool blk_rq_is_seq_zoned_write(struct request *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 +1195,11 @@ 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;
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: Damien Le Moal <damien.lemoal@opensource.wdc.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Ming Lei <ming.lei@redhat.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> --- block/blk-zoned.c | 17 +++++++++++++---- include/linux/blk-mq.h | 6 ++++++ 2 files changed, 19 insertions(+), 4 deletions(-)