btrfs: zoned: locate superblock position using zone capacity

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sb_write_pointer() returns the write position of next superblock. For READ,
we need a previous location. When the pointer is at the head, the previous
one is the last one of the other zone. Calculate the last one's position
from zone capacity.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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Naohiro Aota 2021-08-19 21:19:13 +09:00 • committed by David Sterba

parent 5daaf552d1

commit 9658b72ef3

1 changed files with 13 additions and 2 deletions

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fs/btrfs/zoned.c

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