250 					  struct btrfs_device *dev, u64 logical,  in reada_find_zone()  argument
262 	ret = radix_tree_gang_lookup(&dev->reada_zones, (void **)&zone,  in reada_find_zone()
295 	zone->device = dev; /* our device always sits at index 0 */  in reada_find_zone()
298 		zone->devs[i] = bbio->stripes[i].dev;  in reada_find_zone()
303 	ret = radix_tree_insert(&dev->reada_zones,  in reada_find_zone()
309 		ret = radix_tree_gang_lookup(&dev->reada_zones, (void **)&zone,  in reada_find_zone()
328 	struct btrfs_device *dev;  in reada_find_extent()  local
376 		dev = bbio->stripes[nzones].dev;  in reada_find_extent()
377 		zone = reada_find_zone(fs_info, dev, logical, bbio);  in reada_find_extent()
418 		dev = bbio->stripes[i].dev;  in reada_find_extent()
419 		if (dev == prev_dev) {  in reada_find_extent()
429 		if (!dev->bdev) {  in reada_find_extent()
434 		    dev == fs_info->dev_replace.tgtdev) {  in reada_find_extent()
441 		prev_dev = dev;  in reada_find_extent()
442 		ret = radix_tree_insert(&dev->reada_extents, index, re);  in reada_find_extent()
445 				dev = bbio->stripes[i].dev;  in reada_find_extent()
446 				BUG_ON(dev == NULL);  in reada_find_extent()
448 				radix_tree_delete(&dev->reada_extents, index);  in reada_find_extent()
601 static int reada_pick_zone(struct btrfs_device *dev)  in reada_pick_zone()  argument
610 	if (dev->reada_curr_zone) {  in reada_pick_zone()
611 		reada_peer_zones_set_lock(dev->reada_curr_zone, 0);  in reada_pick_zone()
612 		kref_put(&dev->reada_curr_zone->refcnt, reada_zone_release);  in reada_pick_zone()
613 		dev->reada_curr_zone = NULL;  in reada_pick_zone()
619 		ret = radix_tree_gang_lookup(&dev->reada_zones,  in reada_pick_zone()
637 		dev->reada_curr_zone = top_zone;  in reada_pick_zone()
639 		dev->reada_curr_zone = top_locked_zone;  in reada_pick_zone()
643 	dev->reada_next = dev->reada_curr_zone->start;  in reada_pick_zone()
644 	kref_get(&dev->reada_curr_zone->refcnt);  in reada_pick_zone()
645 	reada_peer_zones_set_lock(dev->reada_curr_zone, 1);  in reada_pick_zone()
651 				   struct btrfs_device *dev)  in reada_start_machine_dev()  argument
663 	if (dev->reada_curr_zone == NULL) {  in reada_start_machine_dev()
664 		ret = reada_pick_zone(dev);  in reada_start_machine_dev()
675 	ret = radix_tree_gang_lookup(&dev->reada_extents, (void **)&re,  in reada_start_machine_dev()
676 				     dev->reada_next >> PAGE_CACHE_SHIFT, 1);  in reada_start_machine_dev()
677 	if (ret == 0 || re->logical >= dev->reada_curr_zone->end) {  in reada_start_machine_dev()
678 		ret = reada_pick_zone(dev);  in reada_start_machine_dev()
684 		ret = radix_tree_gang_lookup(&dev->reada_extents, (void **)&re,  in reada_start_machine_dev()
685 					dev->reada_next >> PAGE_CACHE_SHIFT, 1);  in reada_start_machine_dev()
691 	dev->reada_next = re->logical + re->blocksize;  in reada_start_machine_dev()
700 		if (re->zones[i]->device == dev) {  in reada_start_machine_dev()
710 		re->scheduled_for = dev;  in reada_start_machine_dev()
720 	atomic_inc(&dev->reada_in_flight);  in reada_start_machine_dev()