32  * followed on disk by the mapping table of chunks to zones and the bitmap
38  * All metadata blocks are stored in conventional zones, starting from
57 	/* The number of sequential zones reserved for reclaim */
175 	struct xarray		zones;  member
300 	return xa_load(&zmd->zones, zone_id);  in dmz_get()
311 	if (xa_insert(&zmd->zones, zone_id, zone, GFP_KERNEL)) {  in dmz_insert()
1066 		dmz_dev_err(dev, "Invalid number of reserved sequential zones");  in dmz_check_sb()
1371 	 * Devices that have zones with a capacity smaller than the zone size  in dmz_init_zone()
1409 			 * Tertiary superblock zones are always at the  in dmz_init_zone()
1445  * Free zones descriptors.
1452 		struct dm_zone *zone = xa_load(&zmd->zones, idx);  in dmz_drop_zones()
1455 		xa_erase(&zmd->zones, idx);  in dmz_drop_zones()
1457 	xa_destroy(&zmd->zones);  in dmz_drop_zones()
1498 		DMERR("(%s): No zones found", zmd->devname);  in dmz_init_zones()
1501 	xa_init(&zmd->zones);  in dmz_init_zones()
1509 			DMDEBUG("(%s): Failed to emulate zones, error %d",  in dmz_init_zones()
1528 				DMDEBUG("(%s): Failed to report zones, error %d",  in dmz_init_zones()
1545 		DMDEBUG("(%s): Failed to report zones, error %d",  in dmz_init_zones()
1643 	 * Ignore offline zones, read only zones,  in dmz_reset_zone()
1644 	 * and conventional zones.  in dmz_reset_zone()
1776 	 * At this point, only meta zones and mapped data zones were  in dmz_load_mapping()
1777 	 * fully initialized. All remaining zones are unmapped data  in dmz_load_mapping()
1778 	 * zones. Finish initializing those here.  in dmz_load_mapping()
1842  * The list of mapped zones is maintained in LRU order.
1864  * The list of mapped random zones is maintained
1899 	/* Active zones cannot be reclaimed */  in dmz_lock_zone_reclaim()
1943 	/* If we have cache zones select from the cache zone list */  in dmz_get_rnd_zone_for_reclaim()
1946 		/* Try to relaim random zones, too, when idle */  in dmz_get_rnd_zone_for_reclaim()
1974 	 * If we come here, none of the zones inspected could be locked for  in dmz_get_rnd_zone_for_reclaim()
2020 	 * (1) There is no free sequential zones. Then a random data zone  in dmz_get_zone_for_reclaim()
2119  * Write and discard change the block validity of data zones and their buffer
2120  * zones. Check here that valid blocks are still present. If all blocks are
2121  * invalid, the zones can be unmapped on the fly without waiting for reclaim
2210 	/* Schedule reclaim to ensure free zones are available */  in dmz_alloc_zone()
2241 		 * Fallback to the reserved sequential zones  in dmz_alloc_zone()
2418 	/* Get the zones bitmap blocks */  in dmz_copy_valid_blocks()
2453 	/* Get the zones bitmap blocks */  in dmz_merge_valid_blocks()
2848 		dmz_dev_info(dev, "  %u zones of %llu 512-byte logical sectors (offset %llu)",  in dmz_print_dev()
2854 		dmz_dev_info(dev, "  %u zones of %llu 512-byte logical sectors",  in dmz_print_dev()
2906 	/* Set metadata zones starting from sb_zone */  in dmz_ctr_metadata()
2931 	 * up to 16 zones when idle (min_nr_mblks). Otherwise, if busy, allow  in dmz_ctr_metadata()
2957 	dmz_zmd_info(zmd, "  %u zones of %llu 512-byte logical sectors",  in dmz_ctr_metadata()
2959 	dmz_zmd_debug(zmd, "  %u metadata zones",  in dmz_ctr_metadata()
2961 	dmz_zmd_debug(zmd, "  %u data zones for %u chunks",  in dmz_ctr_metadata()
2963 	dmz_zmd_debug(zmd, "    %u cache zones (%u unmapped)",  in dmz_ctr_metadata()
2966 		dmz_zmd_debug(zmd, "    %u random zones (%u unmapped)",  in dmz_ctr_metadata()
2969 		dmz_zmd_debug(zmd, "    %u sequential zones (%u unmapped)",  in dmz_ctr_metadata()
2973 	dmz_zmd_debug(zmd, "  %u reserved sequential data zones",  in dmz_ctr_metadata()