From: Jan Kara <jack@suse.cz>
To: Christoph Hellwig <hch@lst.de>
Cc: Jens Axboe <axboe@kernel.dk>, Jan Kara <jack@suse.cz>,
Mike Snitzer <snitzer@redhat.com>,
linux-mm@kvack.org,
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, linux-fsdevel@vger.kernel.org,
dm-devel@redhat.com, linux-mtd@lists.infradead.org,
Johannes Thumshirn <johannes.thumshirn@wdc.com>,
Tejun Heo <tj@kernel.org>,
linux-bcache@vger.kernel.org
Subject: Re: [dm-devel] [PATCH 42/45] block: switch disk_part_iter_* to use a struct block_device
Date: Mon, 30 Nov 2020 11:20:22 +0100 [thread overview]
Message-ID: <20201130102022.GF11250@quack2.suse.cz> (raw)
In-Reply-To: <20201128161510.347752-43-hch@lst.de>
On Sat 28-11-20 17:15:07, Christoph Hellwig wrote:
> Switch the partition iter infrastructure to iterate over block_device
> references instead of hd_struct ones mostly used to get at the
> block_device.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
Looks good to me. Feel free to add:
Reviewed-by: Jan Kara <jack@suse.cz>
Honza
> ---
> block/genhd.c | 59 ++++++++++++++++++++-------------------
> block/partitions/core.c | 13 ++++-----
> drivers/s390/block/dasd.c | 8 +++---
> include/linux/genhd.h | 4 +--
> 4 files changed, 42 insertions(+), 42 deletions(-)
>
> diff --git a/block/genhd.c b/block/genhd.c
> index 28ced566c07bb7..e83174818b543a 100644
> --- a/block/genhd.c
> +++ b/block/genhd.c
> @@ -236,7 +236,7 @@ EXPORT_SYMBOL_GPL(disk_part_iter_init);
> * CONTEXT:
> * Don't care.
> */
> -struct hd_struct *disk_part_iter_next(struct disk_part_iter *piter)
> +struct block_device *disk_part_iter_next(struct disk_part_iter *piter)
> {
> struct disk_part_tbl *ptbl;
> int inc, end;
> @@ -274,8 +274,9 @@ struct hd_struct *disk_part_iter_next(struct disk_part_iter *piter)
> piter->idx == 0))
> continue;
>
> - get_device(part_to_dev(part->bd_part));
> - piter->part = part->bd_part;
> + piter->part = bdgrab(part);
> + if (!piter->part)
> + continue;
> piter->idx += inc;
> break;
> }
> @@ -297,7 +298,8 @@ EXPORT_SYMBOL_GPL(disk_part_iter_next);
> */
> void disk_part_iter_exit(struct disk_part_iter *piter)
> {
> - disk_put_part(piter->part);
> + if (piter->part)
> + bdput(piter->part);
> piter->part = NULL;
> }
> EXPORT_SYMBOL_GPL(disk_part_iter_exit);
> @@ -338,7 +340,6 @@ struct block_device *disk_map_sector_rcu(struct gendisk *disk, sector_t sector)
>
> for (i = 1; i < ptbl->len; i++) {
> part = rcu_dereference(ptbl->part[i]);
> -
> if (part && sector_in_part(part, sector)) {
> rcu_assign_pointer(ptbl->last_lookup, part);
> goto out_unlock;
> @@ -639,7 +640,7 @@ static void register_disk(struct device *parent, struct gendisk *disk,
> {
> struct device *ddev = disk_to_dev(disk);
> struct disk_part_iter piter;
> - struct hd_struct *part;
> + struct block_device *part;
> int err;
>
> ddev->parent = parent;
> @@ -689,7 +690,7 @@ static void register_disk(struct device *parent, struct gendisk *disk,
> /* announce possible partitions */
> disk_part_iter_init(&piter, disk, 0);
> while ((part = disk_part_iter_next(&piter)))
> - kobject_uevent(&part_to_dev(part)->kobj, KOBJ_ADD);
> + kobject_uevent(bdev_kobj(part), KOBJ_ADD);
> disk_part_iter_exit(&piter);
>
> if (disk->queue->backing_dev_info->dev) {
> @@ -829,7 +830,7 @@ static void invalidate_partition(struct block_device *bdev)
> void del_gendisk(struct gendisk *disk)
> {
> struct disk_part_iter piter;
> - struct hd_struct *part;
> + struct block_device *part;
>
> might_sleep();
>
> @@ -849,8 +850,8 @@ void del_gendisk(struct gendisk *disk)
> disk_part_iter_init(&piter, disk,
> DISK_PITER_INCL_EMPTY | DISK_PITER_REVERSE);
> while ((part = disk_part_iter_next(&piter))) {
> - invalidate_partition(part->bdev);
> - delete_partition(part);
> + invalidate_partition(part);
> + delete_partition(part->bd_part);
> }
> disk_part_iter_exit(&piter);
>
> @@ -969,7 +970,7 @@ void __init printk_all_partitions(void)
> while ((dev = class_dev_iter_next(&iter))) {
> struct gendisk *disk = dev_to_disk(dev);
> struct disk_part_iter piter;
> - struct hd_struct *part;
> + struct block_device *part;
> char name_buf[BDEVNAME_SIZE];
> char devt_buf[BDEVT_SIZE];
>
> @@ -988,14 +989,14 @@ void __init printk_all_partitions(void)
> */
> disk_part_iter_init(&piter, disk, DISK_PITER_INCL_PART0);
> while ((part = disk_part_iter_next(&piter))) {
> - bool is_part0 = part == disk->part0->bd_part;
> + bool is_part0 = part == disk->part0;
>
> printk("%s%s %10llu %s %s", is_part0 ? "" : " ",
> - bdevt_str(part_devt(part), devt_buf),
> - bdev_nr_sectors(part->bdev) >> 1,
> - disk_name(disk, part->bdev->bd_partno, name_buf),
> - part->bdev->bd_meta_info ?
> - part->bdev->bd_meta_info->uuid : "");
> + bdevt_str(part->bd_dev, devt_buf),
> + bdev_nr_sectors(part) >> 1,
> + disk_name(disk, part->bd_partno, name_buf),
> + part->bd_meta_info ?
> + part->bd_meta_info->uuid : "");
> if (is_part0) {
> if (dev->parent && dev->parent->driver)
> printk(" driver: %s\n",
> @@ -1071,7 +1072,7 @@ static int show_partition(struct seq_file *seqf, void *v)
> {
> struct gendisk *sgp = v;
> struct disk_part_iter piter;
> - struct hd_struct *part;
> + struct block_device *part;
> char buf[BDEVNAME_SIZE];
>
> /* Don't show non-partitionable removeable devices or empty devices */
> @@ -1085,9 +1086,9 @@ static int show_partition(struct seq_file *seqf, void *v)
> disk_part_iter_init(&piter, sgp, DISK_PITER_INCL_PART0);
> while ((part = disk_part_iter_next(&piter)))
> seq_printf(seqf, "%4d %7d %10llu %s\n",
> - MAJOR(part_devt(part)), MINOR(part_devt(part)),
> - bdev_nr_sectors(part->bdev) >> 1,
> - disk_name(sgp, part->bdev->bd_partno, buf));
> + MAJOR(part->bd_dev), MINOR(part->bd_dev),
> + bdev_nr_sectors(part) >> 1,
> + disk_name(sgp, part->bd_partno, buf));
> disk_part_iter_exit(&piter);
>
> return 0;
> @@ -1481,7 +1482,7 @@ static int diskstats_show(struct seq_file *seqf, void *v)
> {
> struct gendisk *gp = v;
> struct disk_part_iter piter;
> - struct hd_struct *hd;
> + struct block_device *hd;
> char buf[BDEVNAME_SIZE];
> unsigned int inflight;
> struct disk_stats stat;
> @@ -1496,11 +1497,11 @@ static int diskstats_show(struct seq_file *seqf, void *v)
>
> disk_part_iter_init(&piter, gp, DISK_PITER_INCL_EMPTY_PART0);
> while ((hd = disk_part_iter_next(&piter))) {
> - part_stat_read_all(hd, &stat);
> + part_stat_read_all(hd->bd_part, &stat);
> if (queue_is_mq(gp->queue))
> - inflight = blk_mq_in_flight(gp->queue, hd->bdev);
> + inflight = blk_mq_in_flight(gp->queue, hd);
> else
> - inflight = part_in_flight(hd->bdev);
> + inflight = part_in_flight(hd);
>
> seq_printf(seqf, "%4d %7d %s "
> "%lu %lu %lu %u "
> @@ -1509,8 +1510,8 @@ static int diskstats_show(struct seq_file *seqf, void *v)
> "%lu %lu %lu %u "
> "%lu %u"
> "\n",
> - MAJOR(part_devt(hd)), MINOR(part_devt(hd)),
> - disk_name(gp, hd->bdev->bd_partno, buf),
> + MAJOR(hd->bd_dev), MINOR(hd->bd_dev),
> + disk_name(gp, hd->bd_partno, buf),
> stat.ios[STAT_READ],
> stat.merges[STAT_READ],
> stat.sectors[STAT_READ],
> @@ -1665,7 +1666,7 @@ static void set_disk_ro_uevent(struct gendisk *gd, int ro)
> void set_disk_ro(struct gendisk *disk, int flag)
> {
> struct disk_part_iter piter;
> - struct hd_struct *part;
> + struct block_device *part;
>
> if (disk->part0->bd_read_only != flag) {
> set_disk_ro_uevent(disk, flag);
> @@ -1674,7 +1675,7 @@ void set_disk_ro(struct gendisk *disk, int flag)
>
> disk_part_iter_init(&piter, disk, DISK_PITER_INCL_EMPTY);
> while ((part = disk_part_iter_next(&piter)))
> - part->bdev->bd_read_only = flag;
> + part->bd_read_only = flag;
> disk_part_iter_exit(&piter);
> }
>
> diff --git a/block/partitions/core.c b/block/partitions/core.c
> index 3d8243334c7cb4..4cb6df175f9077 100644
> --- a/block/partitions/core.c
> +++ b/block/partitions/core.c
> @@ -439,15 +439,14 @@ static bool partition_overlaps(struct gendisk *disk, sector_t start,
> sector_t length, int skip_partno)
> {
> struct disk_part_iter piter;
> - struct hd_struct *part;
> + struct block_device *part;
> bool overlap = false;
>
> disk_part_iter_init(&piter, disk, DISK_PITER_INCL_EMPTY);
> while ((part = disk_part_iter_next(&piter))) {
> - if (part->bdev->bd_partno == skip_partno ||
> - start >= part->bdev->bd_start_sect +
> - bdev_nr_sectors(part->bdev) ||
> - start + length <= part->bdev->bd_start_sect)
> + if (part->bd_partno == skip_partno ||
> + start >= part->bd_start_sect + bdev_nr_sectors(part) ||
> + start + length <= part->bd_start_sect)
> continue;
> overlap = true;
> break;
> @@ -568,7 +567,7 @@ static bool disk_unlock_native_capacity(struct gendisk *disk)
> int blk_drop_partitions(struct block_device *bdev)
> {
> struct disk_part_iter piter;
> - struct hd_struct *part;
> + struct block_device *part;
>
> if (bdev->bd_part_count)
> return -EBUSY;
> @@ -578,7 +577,7 @@ int blk_drop_partitions(struct block_device *bdev)
>
> disk_part_iter_init(&piter, bdev->bd_disk, DISK_PITER_INCL_EMPTY);
> while ((part = disk_part_iter_next(&piter)))
> - delete_partition(part);
> + delete_partition(part->bd_part);
> disk_part_iter_exit(&piter);
>
> return 0;
> diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
> index db24e04ee9781e..1825fa8d05a780 100644
> --- a/drivers/s390/block/dasd.c
> +++ b/drivers/s390/block/dasd.c
> @@ -432,7 +432,7 @@ dasd_state_ready_to_online(struct dasd_device * device)
> {
> struct gendisk *disk;
> struct disk_part_iter piter;
> - struct hd_struct *part;
> + struct block_device *part;
>
> device->state = DASD_STATE_ONLINE;
> if (device->block) {
> @@ -445,7 +445,7 @@ dasd_state_ready_to_online(struct dasd_device * device)
> disk = device->block->bdev->bd_disk;
> disk_part_iter_init(&piter, disk, DISK_PITER_INCL_PART0);
> while ((part = disk_part_iter_next(&piter)))
> - kobject_uevent(&part_to_dev(part)->kobj, KOBJ_CHANGE);
> + kobject_uevent(bdev_kobj(part), KOBJ_CHANGE);
> disk_part_iter_exit(&piter);
> }
> return 0;
> @@ -459,7 +459,7 @@ static int dasd_state_online_to_ready(struct dasd_device *device)
> int rc;
> struct gendisk *disk;
> struct disk_part_iter piter;
> - struct hd_struct *part;
> + struct block_device *part;
>
> if (device->discipline->online_to_ready) {
> rc = device->discipline->online_to_ready(device);
> @@ -472,7 +472,7 @@ static int dasd_state_online_to_ready(struct dasd_device *device)
> disk = device->block->bdev->bd_disk;
> disk_part_iter_init(&piter, disk, DISK_PITER_INCL_PART0);
> while ((part = disk_part_iter_next(&piter)))
> - kobject_uevent(&part_to_dev(part)->kobj, KOBJ_CHANGE);
> + kobject_uevent(bdev_kobj(part), KOBJ_CHANGE);
> disk_part_iter_exit(&piter);
> }
> return 0;
> diff --git a/include/linux/genhd.h b/include/linux/genhd.h
> index 3c13d4708e3f9d..cd23c80265b2b2 100644
> --- a/include/linux/genhd.h
> +++ b/include/linux/genhd.h
> @@ -244,14 +244,14 @@ static inline void disk_put_part(struct hd_struct *part)
>
> struct disk_part_iter {
> struct gendisk *disk;
> - struct hd_struct *part;
> + struct block_device *part;
> int idx;
> unsigned int flags;
> };
>
> extern void disk_part_iter_init(struct disk_part_iter *piter,
> struct gendisk *disk, unsigned int flags);
> -extern struct hd_struct *disk_part_iter_next(struct disk_part_iter *piter);
> +struct block_device *disk_part_iter_next(struct disk_part_iter *piter);
> extern void disk_part_iter_exit(struct disk_part_iter *piter);
> extern bool disk_has_partitions(struct gendisk *disk);
>
> --
> 2.29.2
>
--
Jan Kara <jack@suse.com>
SUSE Labs, CR
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next prev parent reply other threads:[~2020-11-30 10:20 UTC|newest]
Thread overview: 99+ messages / expand[flat|nested] mbox.gz Atom feed top
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 01/45] blk-cgroup: fix a hd_struct leak in blkcg_fill_root_iostats Christoph Hellwig
2020-11-28 16:14 ` [dm-devel] [PATCH 02/45] filemap: consistently use ->f_mapping over ->i_mapping Christoph Hellwig
2020-11-30 9:20 ` Johannes Thumshirn
2020-11-28 16:14 ` [dm-devel] [PATCH 03/45] fs: remove get_super_thawed and get_super_exclusive_thawed Christoph Hellwig
2020-11-28 16:14 ` [dm-devel] [PATCH 04/45] fs: simplify freeze_bdev/thaw_bdev Christoph Hellwig
2020-11-30 17:55 ` Darrick J. Wong
2020-11-28 16:14 ` [dm-devel] [PATCH 05/45] mtip32xx: remove the call to fsync_bdev on removal Christoph Hellwig
2020-11-30 7:07 ` Hannes Reinecke
2020-11-30 14:48 ` Johannes Thumshirn
2020-11-28 16:14 ` [dm-devel] [PATCH 06/45] zram: do not call set_blocksize Christoph Hellwig
2020-11-28 16:14 ` [dm-devel] [PATCH 07/45] loop: " Christoph Hellwig
2020-11-30 7:07 ` Hannes Reinecke
2020-11-30 11:26 ` Johannes Thumshirn
2020-11-28 16:14 ` [dm-devel] [PATCH 08/45] dm: simplify flush_bio initialization in __send_empty_flush Christoph Hellwig
2020-11-30 7:08 ` Hannes Reinecke
2020-11-28 16:14 ` [dm-devel] [PATCH 09/45] dm: remove the block_device reference in struct mapped_device Christoph Hellwig
2020-11-28 16:14 ` [dm-devel] [PATCH 10/45] block: remove a duplicate __disk_get_part prototype Christoph Hellwig
2020-11-28 16:14 ` [dm-devel] [PATCH 11/45] block: remove a superflous check in blkpg_do_ioctl Christoph Hellwig
2020-11-30 9:20 ` Johannes Thumshirn
2020-11-28 16:14 ` [dm-devel] [PATCH 12/45] block: add a bdev_kobj helper Christoph Hellwig
2020-11-28 16:14 ` [dm-devel] [PATCH 13/45] block: use disk_part_iter_exit in disk_part_iter_next Christoph Hellwig
2020-11-28 16:14 ` [dm-devel] [PATCH 14/45] block: use put_device in put_disk Christoph Hellwig
2020-11-30 7:09 ` Hannes Reinecke
2020-11-28 16:14 ` [dm-devel] [PATCH 15/45] block: change the hash used for looking up block devices Christoph Hellwig
2020-11-30 7:10 ` Hannes Reinecke
2020-11-28 16:14 ` [dm-devel] [PATCH 16/45] block: switch bdgrab to use igrab Christoph Hellwig
2020-11-30 7:14 ` Hannes Reinecke
2020-11-30 9:09 ` Jan Kara
2020-11-30 14:52 ` Johannes Thumshirn
2020-11-28 16:14 ` [dm-devel] [PATCH 17/45] init: refactor name_to_dev_t Christoph Hellwig
2020-11-30 7:15 ` Hannes Reinecke
2020-11-28 16:14 ` [dm-devel] [PATCH 18/45] init: refactor devt_from_partuuid Christoph Hellwig
2020-11-30 7:16 ` Hannes Reinecke
2020-11-28 16:14 ` [dm-devel] [PATCH 19/45] init: cleanup match_dev_by_uuid and match_dev_by_label Christoph Hellwig
2020-11-30 7:17 ` Hannes Reinecke
2020-11-28 16:14 ` [dm-devel] [PATCH 20/45] block: refactor __blkdev_put Christoph Hellwig
2020-11-30 7:17 ` Hannes Reinecke
2020-11-28 16:14 ` [dm-devel] [PATCH 21/45] block: refactor blkdev_get Christoph Hellwig
2020-11-30 7:28 ` Hannes Reinecke
2020-11-28 16:14 ` [dm-devel] [PATCH 22/45] block: move bdput() to the callers of __blkdev_get Christoph Hellwig
2020-11-30 7:29 ` Hannes Reinecke
2020-11-28 16:14 ` [dm-devel] [PATCH 23/45] block: opencode devcgroup_inode_permission Christoph Hellwig
2020-11-30 7:30 ` Hannes Reinecke
2020-11-28 16:14 ` [dm-devel] [PATCH 24/45] block: remove i_bdev Christoph Hellwig
2020-11-30 7:31 ` Hannes Reinecke
2020-11-28 16:14 ` [dm-devel] [PATCH 25/45] block: simplify bdev/disk lookup in blkdev_get Christoph Hellwig
2020-11-30 7:36 ` Hannes Reinecke
2020-11-30 9:24 ` Jan Kara
2020-12-02 21:52 ` Tejun Heo
2020-11-28 16:14 ` [dm-devel] [PATCH 26/45] block: remove ->bd_contains Christoph Hellwig
2020-11-30 7:37 ` Hannes Reinecke
2020-11-28 16:14 ` [dm-devel] [PATCH 27/45] block: simplify the block device claiming interface Christoph Hellwig
2020-11-30 7:37 ` Hannes Reinecke
2020-11-28 16:14 ` [dm-devel] [PATCH 28/45] block: simplify part_to_disk Christoph Hellwig
2020-11-30 7:38 ` Hannes Reinecke
2020-11-28 16:14 ` [dm-devel] [PATCH 29/45] block: initialize struct block_device in bdev_alloc Christoph Hellwig
2020-11-30 7:38 ` Hannes Reinecke
2020-11-28 16:14 ` [dm-devel] [PATCH 30/45] block: remove the nr_sects field in struct hd_struct Christoph Hellwig
2020-11-30 7:39 ` Hannes Reinecke
2020-11-30 9:44 ` Jan Kara
2020-11-30 14:51 ` Christoph Hellwig
2020-11-30 15:17 ` Jan Kara
2020-11-28 16:14 ` [dm-devel] [PATCH 31/45] block: move disk stat accounting to struct block_device Christoph Hellwig
2020-11-30 7:40 ` Hannes Reinecke
2020-11-28 16:14 ` [dm-devel] [PATCH 32/45] block: move the start_sect field " Christoph Hellwig
2020-11-30 7:41 ` Hannes Reinecke
2020-11-28 16:14 ` [dm-devel] [PATCH 33/45] block: move the partition_meta_info " Christoph Hellwig
2020-11-30 7:41 ` Hannes Reinecke
2020-11-28 16:14 ` [dm-devel] [PATCH 34/45] block: move holder_dir " Christoph Hellwig
2020-11-30 7:42 ` Hannes Reinecke
2020-11-28 16:15 ` [dm-devel] [PATCH 35/45] block: move make_it_fail " Christoph Hellwig
2020-11-30 7:43 ` Hannes Reinecke
2020-11-28 16:15 ` [dm-devel] [PATCH 36/45] block: move the policy field " Christoph Hellwig
2020-11-30 7:44 ` Hannes Reinecke
2020-11-28 16:15 ` [dm-devel] [PATCH 37/45] block: allocate struct hd_struct as part of struct bdev_inode Christoph Hellwig
2020-11-30 7:46 ` Hannes Reinecke
2020-11-30 9:53 ` Jan Kara
2020-11-28 16:15 ` [dm-devel] [PATCH 38/45] block: switch partition lookup to use struct block_device Christoph Hellwig
2020-11-30 7:47 ` Hannes Reinecke
2020-11-28 16:15 ` [dm-devel] [PATCH 39/45] block: remove the partno field from struct hd_struct Christoph Hellwig
2020-11-30 7:47 ` Hannes Reinecke
2020-11-28 16:15 ` [dm-devel] [PATCH 40/45] block: pass a block_device to blk_alloc_devt Christoph Hellwig
2020-11-30 7:48 ` Hannes Reinecke
2020-11-28 16:15 ` [dm-devel] [PATCH 41/45] block: pass a block_device to invalidate_partition Christoph Hellwig
2020-11-30 7:49 ` Hannes Reinecke
2020-11-28 16:15 ` [dm-devel] [PATCH 42/45] block: switch disk_part_iter_* to use a struct block_device Christoph Hellwig
2020-11-30 7:50 ` Hannes Reinecke
2020-11-30 10:20 ` Jan Kara [this message]
2020-11-28 16:15 ` [dm-devel] [PATCH 43/45] f2fs: remove a few bd_part checks Christoph Hellwig
2020-11-30 7:50 ` Hannes Reinecke
2020-11-28 16:15 ` [dm-devel] [PATCH 44/45] block: merge struct block_device and struct hd_struct Christoph Hellwig
2020-11-30 7:51 ` Hannes Reinecke
2020-11-30 10:29 ` Jan Kara
2020-11-28 16:15 ` [dm-devel] [PATCH 45/45] block: stop using bdget_disk for partition 0 Christoph Hellwig
2020-11-30 7:51 ` Hannes Reinecke
2020-11-30 17:19 ` [dm-devel] merge struct block_device and struct hd_struct v4 Christoph Hellwig
2020-11-30 17:51 ` Jens Axboe
-- strict thread matches above, loose matches on Subject: below --
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 42/45] block: switch disk_part_iter_* to use a struct block_device Christoph Hellwig
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