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btrfs: zoned: fix incorrect ASSERT in btrfs_zoned_reserve_data_reloc_bg()

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When moving a block-group to the dedicated data relocation space-info in
btrfs_zoned_reserve_data_reloc_bg() it is asserted that the newly
created block group for data relocation does not contain any
zone_unusable bytes.

But on disks with zone_capacity < zone_size, the difference between
zone_size and zone_capacity is accounted as zone_unusable.

Instead of asserting that the block-group does not contain any
zone_unusable bytes, remove them from the block-groups total size.

Reported-by: Yi Zhang <yi.zhang@redhat.com>
Link: https://lore.kernel.org/linux-block/CAHj4cs8-cS2E+-xQ-d2Bj6vMJZ+CwT_cbdWBTju4BV35LsvEYw@mail.gmail.com/
Fixes: daa0fde322 ("btrfs: zoned: fix data relocation block group reservation")
Reviewed-by: Naohiro Aota <naohiro.aota@wdc.com>
Tested-by: Yi Zhang <yi.zhang@redhat.com>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Johannes Thumshirn 2025-09-05 15:54:43 +02:00 • committed by David Sterba
parent b62fd63ade
commit 5b8d296475
1 changed files with 1 additions and 1 deletions
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2
fs/btrfs/zoned.c
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@ -2582,9 +2582,9 @@ again:
spin_lock(&space_info->lock);
space_info->total_bytes -= bg->length;
space_info->disk_total -= bg->length * factor;
space_info->disk_total -= bg->zone_unusable;
/* There is no allocation ever happened. */
ASSERT(bg->used == 0);
ASSERT(bg->zone_unusable == 0);
/* No super block in a block group on the zoned setup. */
ASSERT(bg->bytes_super == 0);
spin_unlock(&space_info->lock);