btrfs: zoned: reset zones of unused block groups

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We must reset the zones of a deleted unused block group to rewind the
zones' write pointers to the zones' start.

To do this, we can use the DISCARD_SYNC code to do the reset when the
filesystem is running on zoned devices.

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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Naohiro Aota 2021-02-04 19:21:56 +09:00 • committed by David Sterba

parent 011b41bffa

commit dcba6e48b5

3 changed files with 33 additions and 7 deletions

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8

fs/btrfs/block-group.c

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17

fs/btrfs/extent-tree.c

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15

fs/btrfs/zoned.h

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