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From: Christoph Hellwig <hch@lst.de>
To: Jens Axboe <axboe@kernel.dk>
Cc: linux-bcache@vger.kernel.org, Jan Kara <jack@suse.cz>,
	linux-fsdevel@vger.kernel.org, Mike Snitzer <snitzer@redhat.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Jan Kara <jack@suse.com>, Josef Bacik <josef@toxicpanda.com>,
	Coly Li <colyli@suse.de>,
	linux-block@vger.kernel.org, Richard Weinberger <richard@nod.at>,
	dm-devel@redhat.com, linux-mtd@lists.infradead.org,
	Johannes Thumshirn <johannes.thumshirn@wdc.com>,
	Tejun Heo <tj@kernel.org>,
	xen-devel@lists.xenproject.org, linux-mm@kvack.org
Subject: [dm-devel] [PATCH 32/45] block: move the start_sect field to struct block_device
Date: Tue, 24 Nov 2020 14:27:38 +0100
Message-ID: <20201124132751.3747337-33-hch@lst.de> (raw)
In-Reply-To: <20201124132751.3747337-1-hch@lst.de>

Move the start_sect field to struct block_device in preparation
of killing struct hd_struct.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 block/blk-core.c          |  5 +++--
 block/blk-lib.c           |  2 +-
 block/genhd.c             |  4 ++--
 block/partitions/core.c   | 17 +++++++++--------
 include/linux/blk_types.h |  1 +
 include/linux/blkdev.h    |  4 ++--
 include/linux/genhd.h     |  3 +--
 kernel/trace/blktrace.c   | 11 +++--------
 8 files changed, 22 insertions(+), 25 deletions(-)

diff --git a/block/blk-core.c b/block/blk-core.c
index d2c9cb24e087f3..9a3793d5ce38d4 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -757,9 +757,10 @@ static inline int blk_partition_remap(struct bio *bio)
 	if (bio_sectors(bio)) {
 		if (bio_check_eod(bio, bdev_nr_sectors(p->bdev)))
 			goto out;
-		bio->bi_iter.bi_sector += p->start_sect;
+		bio->bi_iter.bi_sector += p->bdev->bd_start_sect;
 		trace_block_bio_remap(bio->bi_disk->queue, bio, part_devt(p),
-				      bio->bi_iter.bi_sector - p->start_sect);
+				      bio->bi_iter.bi_sector -
+				      p->bdev->bd_start_sect);
 	}
 	bio->bi_partno = 0;
 	ret = 0;
diff --git a/block/blk-lib.c b/block/blk-lib.c
index e90614fd8d6a42..752f9c7220622a 100644
--- a/block/blk-lib.c
+++ b/block/blk-lib.c
@@ -65,7 +65,7 @@ int __blkdev_issue_discard(struct block_device *bdev, sector_t sector,
 
 	/* In case the discard request is in a partition */
 	if (bdev_is_partition(bdev))
-		part_offset = bdev->bd_part->start_sect;
+		part_offset = bdev->bd_start_sect;
 
 	while (nr_sects) {
 		sector_t granularity_aligned_lba, req_sects;
diff --git a/block/genhd.c b/block/genhd.c
index 0c0458367da7e4..8212a2dd10ec4e 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -295,8 +295,8 @@ EXPORT_SYMBOL_GPL(disk_part_iter_exit);
 
 static inline int sector_in_part(struct hd_struct *part, sector_t sector)
 {
-	return part->start_sect <= sector &&
-		sector < part->start_sect + bdev_nr_sectors(part->bdev);
+	return part->bdev->bd_start_sect <= sector &&
+		sector < part->bdev->bd_start_sect + bdev_nr_sectors(part->bdev);
 }
 
 /**
diff --git a/block/partitions/core.c b/block/partitions/core.c
index c3a4870bfb123d..aa4b836374b037 100644
--- a/block/partitions/core.c
+++ b/block/partitions/core.c
@@ -192,7 +192,7 @@ static ssize_t part_start_show(struct device *dev,
 {
 	struct hd_struct *p = dev_to_part(dev);
 
-	return sprintf(buf, "%llu\n",(unsigned long long)p->start_sect);
+	return sprintf(buf, "%llu\n",(unsigned long long)p->bdev->bd_start_sect);
 }
 
 static ssize_t part_ro_show(struct device *dev,
@@ -209,7 +209,7 @@ static ssize_t part_alignment_offset_show(struct device *dev,
 
 	return sprintf(buf, "%u\n",
 		queue_limit_alignment_offset(&part_to_disk(p)->queue->limits,
-				p->start_sect));
+				p->bdev->bd_start_sect));
 }
 
 static ssize_t part_discard_alignment_show(struct device *dev,
@@ -219,7 +219,7 @@ static ssize_t part_discard_alignment_show(struct device *dev,
 
 	return sprintf(buf, "%u\n",
 		queue_limit_discard_alignment(&part_to_disk(p)->queue->limits,
-				p->start_sect));
+				p->bdev->bd_start_sect));
 }
 
 static DEVICE_ATTR(partition, 0444, part_partition_show, NULL);
@@ -301,7 +301,7 @@ static void hd_struct_free_work(struct work_struct *work)
 	 */
 	put_device(disk_to_dev(disk));
 
-	part->start_sect = 0;
+	part->bdev->bd_start_sect = 0;
 	bdev_set_nr_sectors(part->bdev, 0);
 	part_stat_set_all(part, 0);
 	put_device(part_to_dev(part));
@@ -416,7 +416,7 @@ static struct hd_struct *add_partition(struct gendisk *disk, int partno,
 
 	pdev = part_to_dev(p);
 
-	p->start_sect = start;
+	bdev->bd_start_sect = start;
 	bdev_set_nr_sectors(bdev, len);
 	p->partno = partno;
 	p->policy = get_disk_ro(disk);
@@ -508,8 +508,9 @@ static bool partition_overlaps(struct gendisk *disk, sector_t start,
 	disk_part_iter_init(&piter, disk, DISK_PITER_INCL_EMPTY);
 	while ((part = disk_part_iter_next(&piter))) {
 		if (part->partno == skip_partno ||
-		    start >= part->start_sect + bdev_nr_sectors(part->bdev) ||
-		    start + length <= part->start_sect)
+		    start >= part->bdev->bd_start_sect +
+			bdev_nr_sectors(part->bdev) ||
+		    start + length <= part->bdev->bd_start_sect)
 			continue;
 		overlap = true;
 		break;
@@ -592,7 +593,7 @@ int bdev_resize_partition(struct block_device *bdev, int partno,
 	mutex_lock_nested(&bdev->bd_mutex, 1);
 
 	ret = -EINVAL;
-	if (start != part->start_sect)
+	if (start != part->bdev->bd_start_sect)
 		goto out_unlock;
 
 	ret = -EBUSY;
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index 520011b95276fb..a690008f60cd92 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -20,6 +20,7 @@ typedef void (bio_end_io_t) (struct bio *);
 struct bio_crypt_ctx;
 
 struct block_device {
+	sector_t		bd_start_sect;
 	struct disk_stats __percpu *bd_stats;
 	unsigned long		bd_stamp;
 	dev_t			bd_dev;
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index db1b11d6d07568..8fc0b266610f7f 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1488,7 +1488,7 @@ static inline int bdev_alignment_offset(struct block_device *bdev)
 		return -1;
 	if (bdev_is_partition(bdev))
 		return queue_limit_alignment_offset(&q->limits,
-				bdev->bd_part->start_sect);
+				bdev->bd_start_sect);
 	return q->limits.alignment_offset;
 }
 
@@ -1529,7 +1529,7 @@ static inline int bdev_discard_alignment(struct block_device *bdev)
 
 	if (bdev_is_partition(bdev))
 		return queue_limit_discard_alignment(&q->limits,
-				bdev->bd_part->start_sect);
+				bdev->bd_start_sect);
 	return q->limits.discard_alignment;
 }
 
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index dcc40c8217d095..a9d64da474233f 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -51,7 +51,6 @@ struct partition_meta_info {
 };
 
 struct hd_struct {
-	sector_t start_sect;
 	struct percpu_ref ref;
 
 	struct block_device *bdev;
@@ -299,7 +298,7 @@ extern void rand_initialize_disk(struct gendisk *disk);
 
 static inline sector_t get_start_sect(struct block_device *bdev)
 {
-	return bdev->bd_part->start_sect;
+	return bdev->bd_start_sect;
 }
 
 static inline sector_t bdev_nr_sectors(struct block_device *bdev)
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index 7076d588a50d69..8a723a91ec5a06 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -458,14 +458,9 @@ static struct rchan_callbacks blk_relay_callbacks = {
 static void blk_trace_setup_lba(struct blk_trace *bt,
 				struct block_device *bdev)
 {
-	struct hd_struct *part = NULL;
-
-	if (bdev)
-		part = bdev->bd_part;
-
-	if (part) {
-		bt->start_lba = part->start_sect;
-		bt->end_lba = part->start_sect + bdev_nr_sectors(bdev);
+	if (bdev) {
+		bt->start_lba = bdev->bd_start_sect;
+		bt->end_lba = bdev->bd_start_sect + bdev_nr_sectors(bdev);
 	} else {
 		bt->start_lba = 0;
 		bt->end_lba = -1ULL;
-- 
2.29.2

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  parent reply index

Thread overview: 92+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-24 13:27 [dm-devel] merge struct block_device and struct hd_struct v2 Christoph Hellwig
2020-11-24 13:27 ` [dm-devel] [PATCH 01/45] blk-cgroup: fix a hd_struct leak in blkcg_fill_root_iostats Christoph Hellwig
2020-11-25  6:41   ` Hannes Reinecke
2020-11-24 13:27 ` [dm-devel] [PATCH 02/45] filemap: consistently use ->f_mapping over ->i_mapping Christoph Hellwig
2020-11-24 13:53   ` Matthew Wilcox
2020-11-25  6:41   ` Hannes Reinecke
2020-11-25 12:16   ` Jan Kara
2020-11-24 13:27 ` [dm-devel] [PATCH 03/45] fs: remove get_super_thawed and get_super_exclusive_thawed Christoph Hellwig
2020-11-25  6:42   ` Hannes Reinecke
2020-11-25 12:19   ` Jan Kara
2020-11-24 13:27 ` [dm-devel] [PATCH 04/45] fs: simplify freeze_bdev/thaw_bdev Christoph Hellwig
2020-11-25  6:07   ` Chao Yu
2020-11-25 12:29   ` Jan Kara
2020-11-25 16:22     ` Christoph Hellwig
2020-11-24 13:27 ` [dm-devel] [PATCH 05/45] mtip32xx: remove the call to fsync_bdev on removal Christoph Hellwig
2020-11-25 12:31   ` Jan Kara
2020-11-24 13:27 ` [dm-devel] [PATCH 06/45] zram: remove the claim mechanism Christoph Hellwig
2020-11-25 12:37   ` Jan Kara
2020-11-24 13:27 ` [dm-devel] [PATCH 07/45] zram: do not call set_blocksize Christoph Hellwig
2020-11-24 13:27 ` [dm-devel] [PATCH 08/45] loop: " Christoph Hellwig
2020-11-25 13:37   ` Jan Kara
2020-11-24 13:27 ` [dm-devel] [PATCH 09/45] dm: simplify flush_bio initialization in __send_empty_flush Christoph Hellwig
2020-11-24 13:27 ` [dm-devel] [PATCH 10/45] dm: remove the block_device reference in struct mapped_device Christoph Hellwig
2020-11-24 13:27 ` [dm-devel] [PATCH 11/45] block: remove a duplicate __disk_get_part prototype Christoph Hellwig
2020-11-24 17:36   ` Tejun Heo
2020-11-24 13:27 ` [dm-devel] [PATCH 12/45] block: remove a superflous check in blkpg_do_ioctl Christoph Hellwig
2020-11-24 17:37   ` Tejun Heo
2020-11-25 13:39   ` Jan Kara
2020-11-24 13:27 ` [dm-devel] [PATCH 13/45] block: add a bdev_kobj helper Christoph Hellwig
2020-11-24 13:41   ` Coly Li
2020-11-24 17:37   ` Tejun Heo
2020-11-24 13:27 ` [dm-devel] [PATCH 14/45] block: use disk_part_iter_exit in disk_part_iter_next Christoph Hellwig
2020-11-24 17:37   ` Tejun Heo
2020-11-24 13:27 ` [dm-devel] [PATCH 15/45] block: use put_device in put_disk Christoph Hellwig
2020-11-24 17:37   ` Tejun Heo
2020-11-24 13:27 ` [dm-devel] [PATCH 16/45] block: change the hash used for looking up block devices Christoph Hellwig
2020-11-24 17:38   ` Tejun Heo
2020-11-24 13:27 ` [dm-devel] [PATCH 17/45] init: refactor name_to_dev_t Christoph Hellwig
2020-11-24 17:38   ` Tejun Heo
2020-11-24 13:27 ` [dm-devel] [PATCH 18/45] init: refactor devt_from_partuuid Christoph Hellwig
2020-11-24 17:38   ` Tejun Heo
2020-11-24 13:27 ` [dm-devel] [PATCH 19/45] init: cleanup match_dev_by_uuid and match_dev_by_label Christoph Hellwig
2020-11-24 17:39   ` Tejun Heo
2020-11-24 13:27 ` [dm-devel] [PATCH 20/45] block: refactor __blkdev_put Christoph Hellwig
2020-11-24 17:41   ` Tejun Heo
2020-11-24 13:27 ` [dm-devel] [PATCH 21/45] block: refactor blkdev_get Christoph Hellwig
2020-11-24 18:03   ` Tejun Heo
2020-11-24 13:27 ` [dm-devel] [PATCH 22/45] block: opencode devcgroup_inode_permission Christoph Hellwig
2020-11-24 18:05   ` Tejun Heo
2020-11-24 13:27 ` [dm-devel] [PATCH 23/45] block: remove i_bdev Christoph Hellwig
2020-11-24 13:38   ` Coly Li
2020-11-24 19:37   ` Tejun Heo
2020-11-25 16:29     ` Christoph Hellwig
2020-11-25 20:19       ` Tejun Heo
2020-11-24 13:27 ` [dm-devel] [PATCH 24/45] blk-cgroup: stop abusing get_gendisk Christoph Hellwig
2020-11-24 19:46   ` Tejun Heo
2020-11-24 13:27 ` [dm-devel] [PATCH 25/45] block: reference struct block_device from struct hd_struct Christoph Hellwig
2020-11-24 21:18   ` Tejun Heo
2020-11-25 16:45     ` Christoph Hellwig
2020-11-25 20:20       ` Tejun Heo
2020-11-26  8:16         ` Christoph Hellwig
2020-11-24 13:27 ` [dm-devel] [PATCH 26/45] block: remove ->bd_contains Christoph Hellwig
2020-11-24 21:19   ` Tejun Heo
2020-11-24 13:27 ` [dm-devel] [PATCH 27/45] block: simplify the block device claiming interface Christoph Hellwig
2020-11-24 21:19   ` Tejun Heo
2020-11-24 13:27 ` [dm-devel] [PATCH 28/45] block: simplify part_to_disk Christoph Hellwig
2020-11-24 21:20   ` Tejun Heo
2020-11-24 13:27 ` [dm-devel] [PATCH 29/45] block: initialize struct block_device in bdev_alloc Christoph Hellwig
2020-11-24 21:20   ` Tejun Heo
2020-11-24 13:27 ` [dm-devel] [PATCH 30/45] block: remove the nr_sects field in struct hd_struct Christoph Hellwig
2020-11-24 13:34   ` Coly Li
2020-11-25  6:10   ` Chao Yu
2020-11-24 13:27 ` [dm-devel] [PATCH 31/45] block: move disk stat accounting to struct block_device Christoph Hellwig
2020-11-24 13:27 ` Christoph Hellwig [this message]
2020-11-24 13:27 ` [dm-devel] [PATCH 33/45] block: move the partition_meta_info " Christoph Hellwig
2020-11-24 13:27 ` [dm-devel] [PATCH 34/45] block: move holder_dir " Christoph Hellwig
2020-11-24 13:27 ` [dm-devel] [PATCH 35/45] block: move make_it_fail " Christoph Hellwig
2020-11-24 13:27 ` [dm-devel] [PATCH 36/45] block: move the policy field " Christoph Hellwig
2020-11-24 13:27 ` [dm-devel] [PATCH 37/45] block: allocate struct hd_struct as part of struct bdev_inode Christoph Hellwig
2020-11-24 13:27 ` [dm-devel] [PATCH 38/45] block: switch partition lookup to use struct block_device Christoph Hellwig
2020-11-24 13:32   ` Coly Li
2020-11-25  6:11   ` Chao Yu
2020-11-24 13:27 ` [dm-devel] [PATCH 39/45] block: remove the partno field from struct hd_struct Christoph Hellwig
2020-11-24 13:27 ` [dm-devel] [PATCH 40/45] block: pass a block_device to blk_alloc_devt Christoph Hellwig
2020-11-24 13:27 ` [dm-devel] [PATCH 41/45] block: pass a block_device to invalidate_partition Christoph Hellwig
2020-11-24 13:27 ` [dm-devel] [PATCH 42/45] block: switch disk_part_iter_* to use a struct block_device Christoph Hellwig
2020-11-24 13:27 ` [dm-devel] [PATCH 43/45] f2fs: remove a few bd_part checks Christoph Hellwig
2020-11-25  6:12   ` Chao Yu
2020-11-24 13:27 ` [dm-devel] [PATCH 44/45] block: merge struct block_device and struct hd_struct Christoph Hellwig
2020-11-24 13:27 ` [dm-devel] [PATCH 45/45] block: stop using bdget_disk for partition 0 Christoph Hellwig
2020-11-28 16:14 [dm-devel] merge struct block_device and struct hd_struct v4 Christoph Hellwig
2020-11-28 16:14 ` [dm-devel] [PATCH 32/45] block: move the start_sect field to struct block_device Christoph Hellwig
2020-11-30  7:41   ` Hannes Reinecke

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