drivers/md/dm-zone.c

21 static int dm_blk_do_report_zones(struct mapped_device *md, struct dm_table *t,
25 	struct gendisk *disk = md->disk;
59 	struct mapped_device *md = disk->private_data;
63 	if (dm_suspended_md(md))
66 	map = dm_get_live_table(md, &srcu_idx);
70 	ret = dm_blk_do_report_zones(md, map, sector, nr_zones, cb, data);
72 	dm_put_live_table(md, srcu_idx);
125 bool dm_is_zone_write(struct mapped_device *md, struct bio *bio)
127 	struct request_queue *q = md->queue;
141 void dm_cleanup_zoned_dev(struct mapped_device *md)
143 	if (md->disk) {
144 		bitmap_free(md->disk->conv_zones_bitmap);
145 		md->disk->conv_zones_bitmap = NULL;
146 		bitmap_free(md->disk->seq_zones_wlock);
147 		md->disk->seq_zones_wlock = NULL;
150 	kvfree(md->zwp_offset);
151 	md->zwp_offset = NULL;
152 	md->nr_zones = 0;
180 	struct mapped_device *md = data;
181 	struct gendisk *disk = md->disk;
201 		if (!md->zwp_offset) {
202 			md->zwp_offset =
205 			if (!md->zwp_offset)
208 		md->zwp_offset[idx] = dm_get_zone_wp_offset(zone);
226 static int dm_revalidate_zones(struct mapped_device *md, struct dm_table *t)
228 	struct gendisk *disk = md->disk;
236 	if (!disk->nr_zones || disk->nr_zones != md->nr_zones)
237 		dm_cleanup_zoned_dev(md);
238 	if (md->nr_zones)
246 	ret = dm_blk_do_report_zones(md, t, 0, disk->nr_zones,
247 				     dm_zone_revalidate_cb, md);
256 	md->nr_zones = disk->nr_zones;
262 	dm_cleanup_zoned_dev(md);
291 	struct mapped_device *md = t->md;
298 	md->disk->nr_zones = bdev_nr_zones(md->disk->part0);
302 		clear_bit(DMF_EMULATE_ZONE_APPEND, &md->flags);
303 		dm_cleanup_zoned_dev(md);
311 	set_bit(DMF_EMULATE_ZONE_APPEND, &md->flags);
312 	if (!get_capacity(md->disk))
315 	return dm_revalidate_zones(md, t);
328 static int dm_update_zone_wp_offset(struct mapped_device *md, unsigned int zno,
331 	sector_t sector = zno * bdev_zone_sectors(md->disk->part0);
336 	t = dm_get_live_table(md, &srcu_idx);
345 	ret = dm_blk_do_report_zones(md, t, sector, 1,
349 	dm_put_live_table(md, srcu_idx);
367 static bool dm_zone_map_bio_begin(struct mapped_device *md,
370 	sector_t zsectors = bdev_zone_sectors(md->disk->part0);
371 	unsigned int zwp_offset = READ_ONCE(md->zwp_offset[zno]);
380 		if (dm_update_zone_wp_offset(md, zno, &zwp_offset))
382 		WRITE_ONCE(md->zwp_offset[zno], zwp_offset);
423 static blk_status_t dm_zone_map_bio_end(struct mapped_device *md, unsigned int zno,
427 	unsigned int zwp_offset = READ_ONCE(md->zwp_offset[zno]);
436 		WRITE_ONCE(md->zwp_offset[zno], 0);
439 		WRITE_ONCE(md->zwp_offset[zno],
440 			   bdev_zone_sectors(md->disk->part0));
444 		WRITE_ONCE(md->zwp_offset[zno], zwp_offset + nr_sectors);
455 		WRITE_ONCE(md->zwp_offset[zno], zwp_offset + nr_sectors);
516 	struct mapped_device *md = io->md;
532 	dm_zone_lock(md->disk, zno, clone);
541 	if (!dm_zone_map_bio_begin(md, zno, clone)) {
542 		dm_zone_unlock(md->disk, zno, clone);
554 		sts = dm_zone_map_bio_end(md, zno, &orig_bio_details,
563 		sts = dm_zone_map_bio_end(md, zno, &orig_bio_details,
566 			dm_zone_unlock(md->disk, zno, clone);
571 		dm_zone_unlock(md->disk, zno, clone);
587 	struct mapped_device *md = io->md;
588 	struct gendisk *disk = md->disk;
597 	if (!dm_emulate_zone_append(md)) {
631 		WRITE_ONCE(md->zwp_offset[zno], DM_ZONE_INVALID_WP_OFST);
637 		zwp_offset = READ_ONCE(md->zwp_offset[zno]);
639 			WRITE_ONCE(md->zwp_offset[zno],