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block: replace seq_zones_bitmap with conv_zones_bitmap

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Invert the meaning of seq_zones_bitmap by keeping a bitmap of
conventional zones.  This allows not having a bitmap for devices
that do not have conventional zones.

Reviewed-by: Javier González <javier@javigon.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig
2019-12-03 10:39:05 +01:00
committed by Jens Axboe
parent 9b38bb4b1e
commit f216fdd77b
2 changed files with 17 additions and 15 deletions
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14
include/linux/blkdev.h
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@@ -503,9 +503,9 @@ struct request_queue {
/*
* Zoned block device information for request dispatch control.
* nr_zones is the total number of zones of the device. This is always
* 0 for regular block devices. seq_zones_bitmap is a bitmap of nr_zones
* bits which indicates if a zone is conventional (bit clear) or
* sequential (bit set). seq_zones_wlock is a bitmap of nr_zones
* 0 for regular block devices. conv_zones_bitmap is a bitmap of nr_zones
* bits which indicates if a zone is conventional (bit set) or
* sequential (bit clear). seq_zones_wlock is a bitmap of nr_zones
* bits which indicates if a zone is write locked, that is, if a write
* request targeting the zone was dispatched. All three fields are
* initialized by the low level device driver (e.g. scsi/sd.c).
@@ -518,7 +518,7 @@ struct request_queue {
* blk_mq_unfreeze_queue().
*/
unsigned int nr_zones;
unsigned long *seq_zones_bitmap;
unsigned long *conv_zones_bitmap;
unsigned long *seq_zones_wlock;
#endif /* CONFIG_BLK_DEV_ZONED */
@@ -723,9 +723,11 @@ static inline unsigned int blk_queue_zone_no(struct request_queue *q,
static inline bool blk_queue_zone_is_seq(struct request_queue *q,
sector_t sector)
{
if (!blk_queue_is_zoned(q) || !q->seq_zones_bitmap)
if (!blk_queue_is_zoned(q))
return false;
return test_bit(blk_queue_zone_no(q, sector), q->seq_zones_bitmap);
if (!q->conv_zones_bitmap)
return true;
return !test_bit(blk_queue_zone_no(q, sector), q->conv_zones_bitmap);
}
#else /* CONFIG_BLK_DEV_ZONED */
static inline unsigned int blk_queue_nr_zones(struct request_queue *q)