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| author | Damien Le Moal <damien.lemoal@wdc.com> | 2021-05-26 06:24:57 +0900 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2021-06-04 12:07:32 -0400 |
| commit | 912e887505a07123917e537b657859723ce5d472 (patch) | |
| tree | 747194a059f7d844ddbc210c8351cf36ca2658d9 /drivers/md/dm-zone.c | |
| parent | 7fc18728482b1a29bd7b8439a0ae7b3f23e097d1 (diff) | |
| download | linux-stable-912e887505a07123917e537b657859723ce5d472.tar.gz linux-stable-912e887505a07123917e537b657859723ce5d472.tar.bz2 linux-stable-912e887505a07123917e537b657859723ce5d472.zip | |
dm: Introduce dm_report_zones()
To simplify the implementation of the report_zones operation of a zoned
target, introduce the function dm_report_zones() to set a target
mapping start sector in struct dm_report_zones_args and call
blkdev_report_zones(). This new function is exported and the report
zones callback function dm_report_zones_cb() is not.
dm-linear, dm-flakey and dm-crypt are modified to use dm_report_zones().
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-zone.c')
| -rw-r--r-- | drivers/md/dm-zone.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/drivers/md/dm-zone.c b/drivers/md/dm-zone.c index 9a34d0f319fd..b42474043249 100644 --- a/drivers/md/dm-zone.c +++ b/drivers/md/dm-zone.c @@ -56,7 +56,8 @@ out: return ret; } -int dm_report_zones_cb(struct blk_zone *zone, unsigned int idx, void *data) +static int dm_report_zones_cb(struct blk_zone *zone, unsigned int idx, + void *data) { struct dm_report_zones_args *args = data; sector_t sector_diff = args->tgt->begin - args->start; @@ -84,7 +85,24 @@ int dm_report_zones_cb(struct blk_zone *zone, unsigned int idx, void *data) args->next_sector = zone->start + zone->len; return args->orig_cb(zone, args->zone_idx++, args->orig_data); } -EXPORT_SYMBOL_GPL(dm_report_zones_cb); + +/* + * Helper for drivers of zoned targets to implement struct target_type + * report_zones operation. + */ +int dm_report_zones(struct block_device *bdev, sector_t start, sector_t sector, + struct dm_report_zones_args *args, unsigned int nr_zones) +{ + /* + * Set the target mapping start sector first so that + * dm_report_zones_cb() can correctly remap zone information. + */ + args->start = start; + + return blkdev_report_zones(bdev, sector, nr_zones, + dm_report_zones_cb, args); +} +EXPORT_SYMBOL_GPL(dm_report_zones); void dm_set_zones_restrictions(struct dm_table *t, struct request_queue *q) { |