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block-6.9-20240420

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Merge tag 'block-6.9-20240420' of git://git.kernel.dk/linux

Pull block fixes from Jens Axboe:
 "Just two minor fixes that should go into the 6.9 kernel release, one
  fixing a regression with partition scanning errors, and one fixing a
  WARN_ON() that can get triggered if we race with a timer"

* tag 'block-6.9-20240420' of git://git.kernel.dk/linux:
  blk-iocost: do not WARN if iocg was already offlined
  block: propagate partition scanning errors to the BLKRRPART ioctl
This commit is contained in:
Linus Torvalds 2024-04-20 11:28:02 -07:00
commit 977b1ef518
4 changed files with 28 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
block/bdev.c
View File

@ -645,6 +645,14 @@ static void blkdev_flush_mapping(struct block_device *bdev)
bdev_write_inode(bdev);
}
static void blkdev_put_whole(struct block_device *bdev)
{
if (atomic_dec_and_test(&bdev->bd_openers))
blkdev_flush_mapping(bdev);
if (bdev->bd_disk->fops->release)
bdev->bd_disk->fops->release(bdev->bd_disk);
}
static int blkdev_get_whole(struct block_device *bdev, blk_mode_t mode)
{
struct gendisk *disk = bdev->bd_disk;
@ -663,20 +671,21 @@ static int blkdev_get_whole(struct block_device *bdev, blk_mode_t mode)
if (!atomic_read(&bdev->bd_openers))
set_init_blocksize(bdev);
if (test_bit(GD_NEED_PART_SCAN, &disk->state))
bdev_disk_changed(disk, false);
atomic_inc(&bdev->bd_openers);
if (test_bit(GD_NEED_PART_SCAN, &disk->state)) {
/*
* Only return scanning errors if we are called from contexts
* that explicitly want them, e.g. the BLKRRPART ioctl.
*/
ret = bdev_disk_changed(disk, false);
if (ret && (mode & BLK_OPEN_STRICT_SCAN)) {
blkdev_put_whole(bdev);
return ret;
}
}
return 0;
}
static void blkdev_put_whole(struct block_device *bdev)
{
if (atomic_dec_and_test(&bdev->bd_openers))
blkdev_flush_mapping(bdev);
if (bdev->bd_disk->fops->release)
bdev->bd_disk->fops->release(bdev->bd_disk);
}
static int blkdev_get_part(struct block_device *part, blk_mode_t mode)
{
struct gendisk *disk = part->bd_disk;

7
block/blk-iocost.c
View File

@ -1439,8 +1439,11 @@ static void iocg_pay_debt(struct ioc_gq *iocg, u64 abs_vpay,
lockdep_assert_held(&iocg->ioc->lock);
lockdep_assert_held(&iocg->waitq.lock);
/* make sure that nobody messed with @iocg */
WARN_ON_ONCE(list_empty(&iocg->active_list));
/*
* make sure that nobody messed with @iocg. Check iocg->pd.online
* to avoid warn when removing blkcg or disk.
*/
WARN_ON_ONCE(list_empty(&iocg->active_list) && iocg->pd.online);
WARN_ON_ONCE(iocg->inuse > 1);
iocg->abs_vdebt -= min(abs_vpay, iocg->abs_vdebt);

3
block/ioctl.c
View File

@ -563,7 +563,8 @@ static int blkdev_common_ioctl(struct block_device *bdev, blk_mode_t mode,
return -EACCES;
if (bdev_is_partition(bdev))
return -EINVAL;
return disk_scan_partitions(bdev->bd_disk, mode);
return disk_scan_partitions(bdev->bd_disk,
mode | BLK_OPEN_STRICT_SCAN);
case BLKTRACESTART:
case BLKTRACESTOP:
case BLKTRACETEARDOWN:

2
include/linux/blkdev.h
View File

@ -128,6 +128,8 @@ typedef unsigned int __bitwise blk_mode_t;
#define BLK_OPEN_WRITE_IOCTL ((__force blk_mode_t)(1 << 4))
/* open is exclusive wrt all other BLK_OPEN_WRITE opens to the device */
#define BLK_OPEN_RESTRICT_WRITES ((__force blk_mode_t)(1 << 5))
/* return partition scanning errors */
#define BLK_OPEN_STRICT_SCAN ((__force blk_mode_t)(1 << 6))
struct gendisk {
/*