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nbd: Respect max_part for all partition scans 

The creation path of the NBD device respects max_part and only scans for
partitions if max_part is not 0. However, some other code paths ignore
max_part, and unconditionally scan for partitions. Add a check for
max_part on each partition scan.

Signed-off-by: Josh Triplett <josh@joshtriplett.org>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Josh Triplett 2020-12-17 00:58:47 -08:00 committed by Jens Axboe
parent 9aaf9a2aba
commit 1aba169e77
1 changed files with 6 additions and 3 deletions
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9
drivers/block/nbd.c
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@ -318,7 +318,8 @@ 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_bit(GD_NEED_PART_SCAN, &nbd->disk->state);
if (max_part)
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;
@ -1476,9 +1477,11 @@ static int nbd_open(struct block_device *bdev, fmode_t mode)
refcount_set(&nbd->config_refs, 1);
refcount_inc(&nbd->refs);
mutex_unlock(&nbd->config_lock);
set_bit(GD_NEED_PART_SCAN, &bdev->bd_disk->state);
if (max_part)
set_bit(GD_NEED_PART_SCAN, &bdev->bd_disk->state);
} else if (nbd_disconnected(nbd->config)) {
set_bit(GD_NEED_PART_SCAN, &bdev->bd_disk->state);
if (max_part)
set_bit(GD_NEED_PART_SCAN, &bdev->bd_disk->state);
}
out:
mutex_unlock(&nbd_index_mutex);