17 /* Maximum number of zones to report per blkdev_report_zones() call */
38 /* Number of superblock log zones */
50 	struct blk_zone *zones = data;  in copy_zone_info_cb()  local
52 	memcpy(&zones[idx], zone, sizeof(*zone));  in copy_zone_info_cb()
57 static int sb_write_pointer(struct block_device *bdev, struct blk_zone *zones,  in sb_write_pointer()  argument
64 	ASSERT(zones[0].type != BLK_ZONE_TYPE_CONVENTIONAL &&  in sb_write_pointer()
65 	       zones[1].type != BLK_ZONE_TYPE_CONVENTIONAL);  in sb_write_pointer()
67 	empty[0] = (zones[0].cond == BLK_ZONE_COND_EMPTY);  in sb_write_pointer()
68 	empty[1] = (zones[1].cond == BLK_ZONE_COND_EMPTY);  in sb_write_pointer()
69 	full[0] = (zones[0].cond == BLK_ZONE_COND_FULL);  in sb_write_pointer()
70 	full[1] = (zones[1].cond == BLK_ZONE_COND_FULL);  in sb_write_pointer()
73 	 * Possible states of log buffer zones  in sb_write_pointer()
82 	 *   0: Use write pointer of zones[0]  in sb_write_pointer()
83 	 *   1: Use write pointer of zones[1]  in sb_write_pointer()
84 	 *   C: Compare super blocks from zones[0] and zones[1], use the latest  in sb_write_pointer()
91 		*wp_ret = zones[0].start << SECTOR_SHIFT;  in sb_write_pointer()
103 			bytenr = ((zones[i].start + zones[i].len)  in sb_write_pointer()
117 			sector = zones[1].start;  in sb_write_pointer()
119 			sector = zones[0].start;  in sb_write_pointer()
124 		sector = zones[0].wp;  in sb_write_pointer()
126 		sector = zones[1].wp;  in sb_write_pointer()
171 				struct blk_zone *zones, unsigned int nr_zones)  in emulate_report_zones()  argument
179 		zones[i].start = i * zone_sectors + pos;  in emulate_report_zones()
180 		zones[i].len = zone_sectors;  in emulate_report_zones()
181 		zones[i].capacity = zone_sectors;  in emulate_report_zones()
182 		zones[i].wp = zones[i].start + zone_sectors;  in emulate_report_zones()
183 		zones[i].type = BLK_ZONE_TYPE_CONVENTIONAL;  in emulate_report_zones()
184 		zones[i].cond = BLK_ZONE_COND_NOT_WP;  in emulate_report_zones()
186 		if (zones[i].wp >= bdev_size) {  in emulate_report_zones()
196 			       struct blk_zone *zones, unsigned int *nr_zones)  in btrfs_get_dev_zones()  argument
204 		ret = emulate_report_zones(device, pos, zones, *nr_zones);  in btrfs_get_dev_zones()
210 				  copy_zone_info_cb, zones);  in btrfs_get_dev_zones()
301 	struct blk_zone *zones = NULL;  in btrfs_get_dev_zone_info()  local
366 	zones = kcalloc(BTRFS_REPORT_NR_ZONES, sizeof(struct blk_zone), GFP_KERNEL);  in btrfs_get_dev_zone_info()
367 	if (!zones) {  in btrfs_get_dev_zone_info()
372 	/* Get zones type */  in btrfs_get_dev_zone_info()
375 		ret = btrfs_get_dev_zones(device, sector << SECTOR_SHIFT, zones,  in btrfs_get_dev_zone_info()
381 			if (zones[i].type == BLK_ZONE_TYPE_SEQWRITE_REQ)  in btrfs_get_dev_zone_info()
383 			if (zones[i].cond == BLK_ZONE_COND_EMPTY)  in btrfs_get_dev_zone_info()
387 		sector = zones[nr_zones - 1].start + zones[nr_zones - 1].len;  in btrfs_get_dev_zone_info()
392 				 "inconsistent number of zones on %s (%u/%u)",  in btrfs_get_dev_zone_info()
426 		 * If zones[0] is conventional, always use the beginning of the  in btrfs_get_dev_zone_info()
445 	kfree(zones);  in btrfs_get_dev_zone_info()
479 	kfree(zones);  in btrfs_get_dev_zone_info()
628 	 * in sequential zones.  in btrfs_check_mountopts_zoned()
643 static int sb_log_location(struct block_device *bdev, struct blk_zone *zones,  in sb_log_location()  argument
649 	if (zones[0].type == BLK_ZONE_TYPE_CONVENTIONAL) {  in sb_log_location()
650 		*bytenr_ret = zones[0].start << SECTOR_SHIFT;  in sb_log_location()
654 	ret = sb_write_pointer(bdev, zones, &wp);  in sb_log_location()
661 		if (wp == zones[0].start << SECTOR_SHIFT)  in sb_log_location()
662 			reset = &zones[0];  in sb_log_location()
663 		else if (wp == zones[1].start << SECTOR_SHIFT)  in sb_log_location()
664 			reset = &zones[1];  in sb_log_location()
680 		if (wp == zones[0].start << SECTOR_SHIFT)  in sb_log_location()
681 			wp = (zones[1].start + zones[1].len) << SECTOR_SHIFT;  in sb_log_location()
693 	struct blk_zone zones[BTRFS_NR_SB_LOG_ZONES];  in btrfs_sb_log_location_bdev()  local
721 				  zones);  in btrfs_sb_log_location_bdev()
727 	return sb_log_location(bdev, zones, rw, bytenr_ret);  in btrfs_sb_log_location_bdev()
829  * btrfs_find_allocatable_zones - find allocatable zones within a given region
835  * @return:	position of allocatable zones
860 		/* Check if zones in the region are all empty */  in btrfs_find_allocatable_zones()
935 	/* All the zones are conventional */  in btrfs_ensure_empty_zones()
939 	/* All the zones are sequential and empty */  in btrfs_ensure_empty_zones()
969  * for a block group consist of conventional zones. It is pointed to the