23 /* Maximum number of zones to report per blkdev_report_zones() call */
44 /* Number of superblock log zones */
48  * Minimum of active zones we need:
50  * - BTRFS_SUPER_MIRROR_MAX zones for superblock mirrors
51  * - 3 zones to ensure at least one zone per SYSTEM, META and DATA block group
79 	struct blk_zone *zones = data;  in copy_zone_info_cb()  local
81 	memcpy(&zones[idx], zone, sizeof(*zone));  in copy_zone_info_cb()
86 static int sb_write_pointer(struct block_device *bdev, struct blk_zone *zones,  in sb_write_pointer()  argument
95 		ASSERT(zones[i].type != BLK_ZONE_TYPE_CONVENTIONAL);  in sb_write_pointer()
96 		empty[i] = (zones[i].cond == BLK_ZONE_COND_EMPTY);  in sb_write_pointer()
97 		full[i] = sb_zone_is_full(&zones[i]);  in sb_write_pointer()
101 	 * Possible states of log buffer zones  in sb_write_pointer()
110 	 *   0: Use write pointer of zones[0]  in sb_write_pointer()
111 	 *   1: Use write pointer of zones[1]  in sb_write_pointer()
112 	 *   C: Compare super blocks from zones[0] and zones[1], use the latest  in sb_write_pointer()
119 		*wp_ret = zones[0].start << SECTOR_SHIFT;  in sb_write_pointer()
129 			u64 zone_end = (zones[i].start + zones[i].capacity) << SECTOR_SHIFT;  in sb_write_pointer()
145 			sector = zones[1].start;  in sb_write_pointer()
147 			sector = zones[0].start;  in sb_write_pointer()
152 		sector = zones[0].wp;  in sb_write_pointer()
154 		sector = zones[1].wp;  in sb_write_pointer()
199 				struct blk_zone *zones, unsigned int nr_zones)  in emulate_report_zones()  argument
207 		zones[i].start = i * zone_sectors + pos;  in emulate_report_zones()
208 		zones[i].len = zone_sectors;  in emulate_report_zones()
209 		zones[i].capacity = zone_sectors;  in emulate_report_zones()
210 		zones[i].wp = zones[i].start + zone_sectors;  in emulate_report_zones()
211 		zones[i].type = BLK_ZONE_TYPE_CONVENTIONAL;  in emulate_report_zones()
212 		zones[i].cond = BLK_ZONE_COND_NOT_WP;  in emulate_report_zones()
214 		if (zones[i].wp >= bdev_size) {  in emulate_report_zones()
224 			       struct blk_zone *zones, unsigned int *nr_zones)  in btrfs_get_dev_zones()  argument
233 		ret = emulate_report_zones(device, pos, zones, *nr_zones);  in btrfs_get_dev_zones()
246 		 * We cannot report zones beyond the zone end. So, it is OK to  in btrfs_get_dev_zones()
260 			/* Cache hit on all the zones */  in btrfs_get_dev_zones()
261 			memcpy(zones, zinfo->zone_cache + zno,  in btrfs_get_dev_zones()
268 				  copy_zone_info_cb, zones);  in btrfs_get_dev_zones()
284 		memcpy(zinfo->zone_cache + zno, zones,  in btrfs_get_dev_zones()
369 	struct blk_zone *zones = NULL;  in btrfs_get_dev_zone_info()  local
433 "zoned: %s: max active zones %u is too small, need at least %u active zones",  in btrfs_get_dev_zone_info()
459 	zones = kvcalloc(BTRFS_REPORT_NR_ZONES, sizeof(struct blk_zone), GFP_KERNEL);  in btrfs_get_dev_zone_info()
460 	if (!zones) {  in btrfs_get_dev_zone_info()
467 	 * fill the zone info with emulated CONVENTIONAL zones, so no need to  in btrfs_get_dev_zone_info()
482 	/* Get zones type */  in btrfs_get_dev_zone_info()
486 		ret = btrfs_get_dev_zones(device, sector << SECTOR_SHIFT, zones,  in btrfs_get_dev_zone_info()
492 			if (zones[i].type == BLK_ZONE_TYPE_SEQWRITE_REQ)  in btrfs_get_dev_zone_info()
494 			switch (zones[i].cond) {  in btrfs_get_dev_zone_info()
507 		sector = zones[nr_zones - 1].start + zones[nr_zones - 1].len;  in btrfs_get_dev_zone_info()
512 				 "inconsistent number of zones on %s (%u/%u)",  in btrfs_get_dev_zone_info()
522 			"zoned: %u active zones on %s exceeds max_active_zones %u",  in btrfs_get_dev_zone_info()
560 		 * If zones[0] is conventional, always use the beginning of the  in btrfs_get_dev_zone_info()
579 	kvfree(zones);  in btrfs_get_dev_zone_info()
611 	kvfree(zones);  in btrfs_get_dev_zone_info()
799 	 * in sequential zones.  in btrfs_check_mountopts_zoned()
817 static int sb_log_location(struct block_device *bdev, struct blk_zone *zones,  in sb_log_location()  argument
823 	if (zones[0].type == BLK_ZONE_TYPE_CONVENTIONAL) {  in sb_log_location()
824 		*bytenr_ret = zones[0].start << SECTOR_SHIFT;  in sb_log_location()
828 	ret = sb_write_pointer(bdev, zones, &wp);  in sb_log_location()
835 		if (wp == zones[0].start << SECTOR_SHIFT)  in sb_log_location()
836 			reset = &zones[0];  in sb_log_location()
837 		else if (wp == zones[1].start << SECTOR_SHIFT)  in sb_log_location()
838 			reset = &zones[1];  in sb_log_location()
859 		if (wp == zones[0].start << SECTOR_SHIFT)  in sb_log_location()
860 			zone_end = zones[1].start + zones[1].capacity;  in sb_log_location()
861 		else if (wp == zones[1].start << SECTOR_SHIFT)  in sb_log_location()
862 			zone_end = zones[0].start + zones[0].capacity;  in sb_log_location()
878 	struct blk_zone zones[BTRFS_NR_SB_LOG_ZONES];  in btrfs_sb_log_location_bdev()  local
906 				  zones);  in btrfs_sb_log_location_bdev()
912 	return sb_log_location(bdev, zones, rw, bytenr_ret);  in btrfs_sb_log_location_bdev()
1006 	/* All the zones are FULL. Should not reach here. */  in btrfs_advance_sb_log()
1034  * Find allocatable zones within a given region.
1040  * @return:	position of allocatable zones
1065 		/* Check if zones in the region are all empty */  in btrfs_find_allocatable_zones()
1108 	/* We can use any number of zones */  in btrfs_dev_set_active_zone()
1130 	/* We can use any number of zones */  in btrfs_dev_clear_active_zone()
1176 	/* All the zones are conventional */  in btrfs_ensure_empty_zones()
1180 	/* All the zones are sequential and empty */  in btrfs_ensure_empty_zones()
1210  * for a block group consist of conventional zones. It is pointed to the
1313 	/* Consider a zone as active if we can allow any number of active zones. */  in btrfs_load_zone_info()
1427 			  "zoned: write pointer offset mismatch of zones in DUP profile");  in btrfs_load_block_group_dup()
1967  * Activate block group and underlying device zones
2015 		 * For the data block group, leave active zones for one  in btrfs_zone_activate()
2032 	/* Successfully activated all the zones */  in btrfs_zone_activate()
2217 	/* Check if there is a device with active zones left */  in btrfs_can_activate_zone()
2494  * Reserve zones for one metadata block group, one tree-log block group, and one
2502 	/* Reserve zones for normal SINGLE metadata and tree-log block group. */  in btrfs_check_active_zone_reservation()