dm: move zone related code to dm-zone.c

Move core and table code used for zoned targets and conditionally
defined with #ifdef CONFIG_BLK_DEV_ZONED to the new file dm-zone.c.
This file is conditionally compiled depending on CONFIG_BLK_DEV_ZONED.
The small helper dm_set_zones_restrictions() is introduced to
initialize a mapped device request queue zone attributes in
dm_table_set_restrictions().

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>

1 files changed, 0 insertions, 78 deletions

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 11af20080639..c49976cc4e44 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -444,84 +444,6 @@ static int dm_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
 	return dm_get_geometry(md, geo);
 }
 
-#ifdef CONFIG_BLK_DEV_ZONED
-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;
-
-	/*
-	 * Ignore zones beyond the target range.
-	 */
-	if (zone->start >= args->start + args->tgt->len)
-		return 0;
-
-	/*
-	 * Remap the start sector and write pointer position of the zone
-	 * to match its position in the target range.
-	 */
-	zone->start += sector_diff;
-	if (zone->type != BLK_ZONE_TYPE_CONVENTIONAL) {
-		if (zone->cond == BLK_ZONE_COND_FULL)
-			zone->wp = zone->start + zone->len;
-		else if (zone->cond == BLK_ZONE_COND_EMPTY)
-			zone->wp = zone->start;
-		else
-			zone->wp += sector_diff;
-	}
-
-	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);
-
-static int dm_blk_report_zones(struct gendisk *disk, sector_t sector,
-		unsigned int nr_zones, report_zones_cb cb, void *data)
-{
-	struct mapped_device *md = disk->private_data;
-	struct dm_table *map;
-	int srcu_idx, ret;
-	struct dm_report_zones_args args = {
-		.next_sector = sector,
-		.orig_data = data,
-		.orig_cb = cb,
-	};
-
-	if (dm_suspended_md(md))
-		return -EAGAIN;
-
-	map = dm_get_live_table(md, &srcu_idx);
-	if (!map) {
-		ret = -EIO;
-		goto out;
-	}
-
-	do {
-		struct dm_target *tgt;
-
-		tgt = dm_table_find_target(map, args.next_sector);
-		if (WARN_ON_ONCE(!tgt->type->report_zones)) {
-			ret = -EIO;
-			goto out;
-		}
-
-		args.tgt = tgt;
-		ret = tgt->type->report_zones(tgt, &args,
-					      nr_zones - args.zone_idx);
-		if (ret < 0)
-			goto out;
-	} while (args.zone_idx < nr_zones &&
-		 args.next_sector < get_capacity(disk));
-
-	ret = args.zone_idx;
-out:
-	dm_put_live_table(md, srcu_idx);
-	return ret;
-}
-#else
-#define dm_blk_report_zones		NULL
-#endif /* CONFIG_BLK_DEV_ZONED */
-
 static int dm_prepare_ioctl(struct mapped_device *md, int *srcu_idx,
 			    struct block_device **bdev)
 {