[PATCH v4 03/11] block: Introduce op_is_zoned_write()

From: Bart Van Assche <bvanassche@acm.org>
To: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org, Jaegeuk Kim <jaegeuk@kernel.org>,
	Christoph Hellwig <hch@lst.de>,
	Bart Van Assche <bvanassche@acm.org>,
	Damien Le Moal <damien.lemoal@opensource.wdc.com>,
	Ming Lei <ming.lei@redhat.com>
Subject: [PATCH v4 03/11] block: Introduce op_is_zoned_write()
Date: Wed,  3 May 2023 15:52:00 -0700	[thread overview]
Message-ID: <20230503225208.2439206-4-bvanassche@acm.org> (raw)
In-Reply-To: <20230503225208.2439206-1-bvanassche@acm.org>

Introduce a helper function for checking whether write serialization is
required if the operation will be sent to a zoned device. A second caller
for op_is_zoned_write() will be introduced in the next patch in this
series.

Suggested-by: Christoph Hellwig <hch@lst.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Cc: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
 include/linux/blkdev.h | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index db24cf98ccfb..a4f85781060c 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1281,13 +1281,16 @@ static inline unsigned int bdev_zone_no(struct block_device *bdev, sector_t sec)
 	return disk_zone_no(bdev->bd_disk, sec);
 }
 
+/* Whether write serialization is required for @op on zoned devices. */
+static inline bool op_is_zoned_write(enum req_op op)
+{
+	return op == REQ_OP_WRITE || op == REQ_OP_WRITE_ZEROES;
+}
+
 static inline bool bdev_op_is_zoned_write(struct block_device *bdev,
 					  enum req_op op)
 {
-	if (!bdev_is_zoned(bdev))
-		return false;
-
-	return op == REQ_OP_WRITE || op == REQ_OP_WRITE_ZEROES;
+	return bdev_is_zoned(bdev) && op_is_zoned_write(op);
 }
 
 static inline sector_t bdev_zone_sectors(struct block_device *bdev)
