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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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18
block/blk-zoned.c
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@ -332,15 +332,15 @@ static inline unsigned long *blk_alloc_zone_bitmap(int node,
void blk_queue_free_zone_bitmaps(struct request_queue *q)
{
kfree(q->seq_zones_bitmap);
q->seq_zones_bitmap = NULL;
kfree(q->conv_zones_bitmap);
q->conv_zones_bitmap = NULL;
kfree(q->seq_zones_wlock);
q->seq_zones_wlock = NULL;
}
struct blk_revalidate_zone_args {
struct gendisk *disk;
unsigned long *seq_zones_bitmap;
unsigned long *conv_zones_bitmap;
unsigned long *seq_zones_wlock;
sector_t sector;
};
@ -394,8 +394,8 @@ static int blk_revalidate_zone_cb(struct blk_zone *zone, unsigned int idx,
return -ENODEV;
}
if (zone->type != BLK_ZONE_TYPE_CONVENTIONAL)
set_bit(idx, args->seq_zones_bitmap);
if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
set_bit(idx, args->conv_zones_bitmap);
args->sector += zone->len;
return 0;
@ -415,8 +415,8 @@ static int blk_update_zone_info(struct gendisk *disk, unsigned int nr_zones,
args->seq_zones_wlock = blk_alloc_zone_bitmap(q->node, nr_zones);
if (!args->seq_zones_wlock)
return -ENOMEM;
args->seq_zones_bitmap = blk_alloc_zone_bitmap(q->node, nr_zones);
if (!args->seq_zones_bitmap)
args->conv_zones_bitmap = blk_alloc_zone_bitmap(q->node, nr_zones);
if (!args->conv_zones_bitmap)
return -ENOMEM;
ret = disk->fops->report_zones(disk, 0, nr_zones,
@ -465,7 +465,7 @@ int blk_revalidate_disk_zones(struct gendisk *disk)
if (ret >= 0) {
q->nr_zones = nr_zones;
swap(q->seq_zones_wlock, args.seq_zones_wlock);
swap(q->seq_zones_bitmap, args.seq_zones_bitmap);
swap(q->conv_zones_bitmap, args.conv_zones_bitmap);
ret = 0;
} else {
pr_warn("%s: failed to revalidate zones\n", disk->disk_name);
@ -474,7 +474,7 @@ int blk_revalidate_disk_zones(struct gendisk *disk)
blk_mq_unfreeze_queue(q);
kfree(args.seq_zones_wlock);
kfree(args.seq_zones_bitmap);
kfree(args.conv_zones_bitmap);
return ret;
}
EXPORT_SYMBOL_GPL(blk_revalidate_disk_zones);

14
include/linux/blkdev.h
View File

@ -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)