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From: Christoph Hellwig <hch@lst.de>
To: Jens Axboe <axboe@kernel.dk>
Cc: Mike Snitzer <snitzer@redhat.com>,
	linux-block@vger.kernel.org, dm-devel@redhat.com
Subject: [PATCH 5/6] block: fold blk_max_size_offset into get_max_io_size
Date: Wed, 13 Oct 2021 19:12:14 +0200	[thread overview]
Message-ID: <20211013171215.1177671-6-hch@lst.de> (raw)
In-Reply-To: <20211013171215.1177671-1-hch@lst.de>

Fold blk_max_size_offset into the only remaining user.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 block/blk-merge.c      | 15 ++++++++++-----
 include/linux/blkdev.h | 19 -------------------
 2 files changed, 10 insertions(+), 24 deletions(-)

diff --git a/block/blk-merge.c b/block/blk-merge.c
index 3e9dde152fdcd..87ea3e7b8ad28 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -177,14 +177,19 @@ static struct bio *blk_bio_write_same_split(struct request_queue *q,
 static inline unsigned get_max_io_size(struct request_queue *q,
 				       struct bio *bio)
 {
-	unsigned sectors = blk_max_size_offset(q, bio->bi_iter.bi_sector, 0);
-	unsigned max_sectors = sectors;
 	unsigned pbs = queue_physical_block_size(q) >> SECTOR_SHIFT;
 	unsigned lbs = queue_logical_block_size(q) >> SECTOR_SHIFT;
-	unsigned start_offset = bio->bi_iter.bi_sector & (pbs - 1);
+	sector_t sector = bio->bi_iter.bi_sector;
+	unsigned start_offset = sector & (pbs - 1);
+	unsigned sectors = q->limits.max_sectors;
+	unsigned max_sectors;
+
+	if (q->limits.chunk_sectors) {
+		sectors = min(sectors, blk_chunk_sectors_left(sector,
+						q->limits.chunk_sectors));
+	}
 
-	max_sectors += start_offset;
-	max_sectors &= ~(pbs - 1);
+	max_sectors = (sectors + start_offset) & ~(pbs - 1);
 	if (max_sectors > start_offset)
 		return max_sectors - start_offset;
 
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index c6ecd996c2d46..7e6b68969cec0 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -634,25 +634,6 @@ static inline unsigned int blk_chunk_sectors_left(sector_t offset,
 	return chunk_sectors - (offset & (chunk_sectors - 1));
 }
 
-/*
- * Return maximum size of a request at given offset. Only valid for
- * file system requests.
- */
-static inline unsigned int blk_max_size_offset(struct request_queue *q,
-					       sector_t offset,
-					       unsigned int chunk_sectors)
-{
-	if (!chunk_sectors) {
-		if (q->limits.chunk_sectors)
-			chunk_sectors = q->limits.chunk_sectors;
-		else
-			return q->limits.max_sectors;
-	}
-
-	return min(q->limits.max_sectors,
-			blk_chunk_sectors_left(offset, chunk_sectors));
-}
-
 /*
  * Access functions for manipulating queue properties
  */
-- 
2.30.2


WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de>
To: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org, dm-devel@redhat.com,
	Mike Snitzer <snitzer@redhat.com>
Subject: [dm-devel] [PATCH 5/6] block: fold blk_max_size_offset into get_max_io_size
Date: Wed, 13 Oct 2021 19:12:14 +0200	[thread overview]
Message-ID: <20211013171215.1177671-6-hch@lst.de> (raw)
In-Reply-To: <20211013171215.1177671-1-hch@lst.de>

Fold blk_max_size_offset into the only remaining user.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 block/blk-merge.c      | 15 ++++++++++-----
 include/linux/blkdev.h | 19 -------------------
 2 files changed, 10 insertions(+), 24 deletions(-)

diff --git a/block/blk-merge.c b/block/blk-merge.c
index 3e9dde152fdcd..87ea3e7b8ad28 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -177,14 +177,19 @@ static struct bio *blk_bio_write_same_split(struct request_queue *q,
 static inline unsigned get_max_io_size(struct request_queue *q,
 				       struct bio *bio)
 {
-	unsigned sectors = blk_max_size_offset(q, bio->bi_iter.bi_sector, 0);
-	unsigned max_sectors = sectors;
 	unsigned pbs = queue_physical_block_size(q) >> SECTOR_SHIFT;
 	unsigned lbs = queue_logical_block_size(q) >> SECTOR_SHIFT;
-	unsigned start_offset = bio->bi_iter.bi_sector & (pbs - 1);
+	sector_t sector = bio->bi_iter.bi_sector;
+	unsigned start_offset = sector & (pbs - 1);
+	unsigned sectors = q->limits.max_sectors;
+	unsigned max_sectors;
+
+	if (q->limits.chunk_sectors) {
+		sectors = min(sectors, blk_chunk_sectors_left(sector,
+						q->limits.chunk_sectors));
+	}
 
-	max_sectors += start_offset;
-	max_sectors &= ~(pbs - 1);
+	max_sectors = (sectors + start_offset) & ~(pbs - 1);
 	if (max_sectors > start_offset)
 		return max_sectors - start_offset;
 
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index c6ecd996c2d46..7e6b68969cec0 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -634,25 +634,6 @@ static inline unsigned int blk_chunk_sectors_left(sector_t offset,
 	return chunk_sectors - (offset & (chunk_sectors - 1));
 }
 
-/*
- * Return maximum size of a request at given offset. Only valid for
- * file system requests.
- */
-static inline unsigned int blk_max_size_offset(struct request_queue *q,
-					       sector_t offset,
-					       unsigned int chunk_sectors)
-{
-	if (!chunk_sectors) {
-		if (q->limits.chunk_sectors)
-			chunk_sectors = q->limits.chunk_sectors;
-		else
-			return q->limits.max_sectors;
-	}
-
-	return min(q->limits.max_sectors,
-			blk_chunk_sectors_left(offset, chunk_sectors));
-}
-
 /*
  * Access functions for manipulating queue properties
  */
-- 
2.30.2

--
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dm-devel@redhat.com
https://listman.redhat.com/mailman/listinfo/dm-devel


  parent reply	other threads:[~2021-10-13 17:19 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-13 17:12 simplify I/O size calculation helpers v2 Christoph Hellwig
2021-10-13 17:12 ` [dm-devel] " Christoph Hellwig
2021-10-13 17:12 ` [PATCH 1/6] block: factor out a chunk_size_left helper Christoph Hellwig
2021-10-13 17:12   ` [dm-devel] " Christoph Hellwig
2021-10-13 17:12 ` [PATCH 2/6] dm: open code blk_max_size_offset in max_io_len Christoph Hellwig
2021-10-13 17:12   ` [dm-devel] " Christoph Hellwig
2021-10-13 17:12 ` [dm-devel] [PATCH 3/6] block: only call blk_queue_get_max_sectors once in blk_rq_get_max_sectors Christoph Hellwig
2021-10-13 17:12   ` Christoph Hellwig
2021-10-13 17:12 ` [PATCH 4/6] block: open code blk_max_size_offset " Christoph Hellwig
2021-10-13 17:12   ` [dm-devel] " Christoph Hellwig
2021-10-13 17:12 ` Christoph Hellwig [this message]
2021-10-13 17:12   ` [dm-devel] [PATCH 5/6] block: fold blk_max_size_offset into get_max_io_size Christoph Hellwig
2021-10-13 17:12 ` [PATCH 6/6] block: pass the start sector to get_max_io_size Christoph Hellwig
2021-10-13 17:12   ` [dm-devel] " Christoph Hellwig
2022-06-14  9:09 clean up the chunk_sizehandling helpers a little Christoph Hellwig
2022-06-14  9:09 ` [PATCH 5/6] block: fold blk_max_size_offset into get_max_io_size Christoph Hellwig
2022-06-14 16:51   ` Bart Van Assche
2022-06-15 10:48   ` Pankaj Raghav

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