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nbd: use set_capacity_and_notify

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Use set_capacity_and_notify to update the disk and block device sizes and
send a RESIZE uevent to userspace.  Note that blktests relies on uevents
being sent also for updates that did not change the device size, so the
explicit kobject_uevent remains for that case.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2020-11-16 15:57:01 +01:00 committed by Jens Axboe
parent dcbddf541f
commit 2ebcabf3db
1 changed files with 3 additions and 12 deletions
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15
drivers/block/nbd.c
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@ -299,8 +299,6 @@ static void nbd_size_clear(struct nbd_device *nbd)
static int nbd_set_size(struct nbd_device *nbd, loff_t bytesize,
loff_t blksize)
{
struct block_device *bdev;
if (!blksize)
blksize = NBD_DEF_BLKSIZE;
if (blksize < 512 || blksize > PAGE_SIZE || !is_power_of_2(blksize))
@ -320,16 +318,9 @@ static int nbd_set_size(struct nbd_device *nbd, loff_t bytesize,
blk_queue_logical_block_size(nbd->disk->queue, blksize);
blk_queue_physical_block_size(nbd->disk->queue, blksize);
set_capacity(nbd->disk, bytesize >> 9);
bdev = bdget_disk(nbd->disk, 0);
if (bdev) {
if (bdev->bd_disk)
bd_set_nr_sectors(bdev, bytesize >> 9);
else
set_bit(GD_NEED_PART_SCAN, &nbd->disk->state);
bdput(bdev);
}
kobject_uevent(&nbd_to_dev(nbd)->kobj, KOBJ_CHANGE);
set_bit(GD_NEED_PART_SCAN, &nbd->disk->state);
if (!set_capacity_and_notify(nbd->disk, bytesize >> 9))
kobject_uevent(&nbd_to_dev(nbd)->kobj, KOBJ_CHANGE);
return 0;
}