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block: improve blk_zone_wp_offset()

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blk_zone_wp_offset() is always called with a struct blk_zone obtained
from the device, that is, it will never see the BLK_ZONE_COND_ACTIVE
condition. However, handling this condition makes this function more
solid and will also avoid issues when propagating cached report requests
to underlying stacked devices is implemented. Add BLK_ZONE_COND_ACTIVE
as a new case in blk_zone_wp_offset() switch.

Also while at it, change the handling of the full condition to return
UINT_MAX for the zone write pointer to reflect the fact that the write
pointer of a full zone is invalid.

Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Damien Le Moal 2025-11-07 15:38:42 +09:00 committed by Jens Axboe
parent 86a9ce21f5
commit bbac6e0fa5
1 changed files with 4 additions and 4 deletions
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8
block/blk-zoned.c
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@ -800,18 +800,18 @@ static unsigned int blk_zone_wp_offset(struct blk_zone *zone)
case BLK_ZONE_COND_IMP_OPEN:
case BLK_ZONE_COND_EXP_OPEN:
case BLK_ZONE_COND_CLOSED:
case BLK_ZONE_COND_ACTIVE:
return zone->wp - zone->start;
case BLK_ZONE_COND_FULL:
return zone->len;
case BLK_ZONE_COND_EMPTY:
return 0;
case BLK_ZONE_COND_FULL:
case BLK_ZONE_COND_NOT_WP:
case BLK_ZONE_COND_OFFLINE:
case BLK_ZONE_COND_READONLY:
default:
/*
* Conventional, offline and read-only zones do not have a valid
* write pointer.
* Conventional, full, offline and read-only zones do not have
* a valid write pointer.
*/
return UINT_MAX;
}