linux-kernel - [PATCH v4 2/7] block: Pass op_flags into blk_queue_get_max

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Date:   Tue, 21 Jan 2020 13:42:31 +0300
From:   Kirill Tkhai <ktkhai@...tuozzo.com>
To:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        martin.petersen@...cle.com, bob.liu@...cle.com, axboe@...nel.dk,
        agk@...hat.com, snitzer@...hat.com, dm-devel@...hat.com,
        song@...nel.org, tytso@....edu, adilger.kernel@...ger.ca,
        Chaitanya.Kulkarni@....com, darrick.wong@...cle.com,
        ming.lei@...hat.com, osandov@...com, jthumshirn@...e.de,
        minwoo.im.dev@...il.com, damien.lemoal@....com,
        andrea.parri@...rulasolutions.com, hare@...e.com, tj@...nel.org,
        ajay.joshi@....com, sagi@...mberg.me, dsterba@...e.com,
        chaitanya.kulkarni@....com, bvanassche@....org,
        dhowells@...hat.com, asml.silence@...il.com, ktkhai@...tuozzo.com
Subject: [PATCH v4 2/7] block: Pass op_flags into blk_queue_get_max_sectors()

This preparation patch changes argument type, and now
the function takes full op_flags instead of just op code.

Signed-off-by: Kirill Tkhai <ktkhai@...tuozzo.com>
---
 block/blk-core.c       |    4 ++--
 include/linux/blkdev.h |    8 +++++---
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/block/blk-core.c b/block/blk-core.c
index 50a5de025d5e..ac2634bcda1f 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1250,10 +1250,10 @@ EXPORT_SYMBOL(submit_bio);
 static int blk_cloned_rq_check_limits(struct request_queue *q,
 				      struct request *rq)
 {
-	if (blk_rq_sectors(rq) > blk_queue_get_max_sectors(q, req_op(rq))) {
+	if (blk_rq_sectors(rq) > blk_queue_get_max_sectors(q, rq->cmd_flags)) {
 		printk(KERN_ERR "%s: over max size limit. (%u > %u)\n",
 			__func__, blk_rq_sectors(rq),
-			blk_queue_get_max_sectors(q, req_op(rq)));
+			blk_queue_get_max_sectors(q, rq->cmd_flags));
 		return -EIO;
 	}
 
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 0f1127d0b043..23a5850f35f6 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -989,8 +989,10 @@ static inline struct bio_vec req_bvec(struct request *rq)
 }
 
 static inline unsigned int blk_queue_get_max_sectors(struct request_queue *q,
-						     int op)
+						     unsigned int op_flags)
 {
+	int op = op_flags & REQ_OP_MASK;
+
 	if (unlikely(op == REQ_OP_DISCARD || op == REQ_OP_SECURE_ERASE))
 		return min(q->limits.max_discard_sectors,
 			   UINT_MAX >> SECTOR_SHIFT);
@@ -1029,10 +1031,10 @@ static inline unsigned int blk_rq_get_max_sectors(struct request *rq,
 	if (!q->limits.chunk_sectors ||
 	    req_op(rq) == REQ_OP_DISCARD ||
 	    req_op(rq) == REQ_OP_SECURE_ERASE)
-		return blk_queue_get_max_sectors(q, req_op(rq));
+		return blk_queue_get_max_sectors(q, rq->cmd_flags);
 
 	return min(blk_max_size_offset(q, offset),
-			blk_queue_get_max_sectors(q, req_op(rq)));
+			blk_queue_get_max_sectors(q, rq->cmd_flags));
 }
 
 static inline unsigned int blk_rq_count_bios(struct request *rq)