+static int bch2_copygc_get_buckets(struct btree_trans *trans,
+ struct moving_context *ctxt,
+ struct buckets_in_flight *buckets_in_flight,
+ move_buckets *buckets)
+{
+ struct bch_fs *c = trans->c;
+ struct btree_iter iter;
+ struct bkey_s_c k;
+ size_t nr_to_get = max(16UL, buckets_in_flight->nr / 4);
+ size_t saw = 0, in_flight = 0, not_movable = 0, sectors = 0;
+ int ret;
+
+ move_buckets_wait(trans, ctxt, buckets_in_flight, false);
+
+ ret = bch2_btree_write_buffer_flush(trans);
+ if (bch2_fs_fatal_err_on(ret, c, "%s: error %s from bch2_btree_write_buffer_flush()",
+ __func__, bch2_err_str(ret)))
+ return ret;
+
+ ret = for_each_btree_key2_upto(trans, iter, BTREE_ID_lru,
+ lru_pos(BCH_LRU_FRAGMENTATION_START, 0, 0),
+ lru_pos(BCH_LRU_FRAGMENTATION_START, U64_MAX, LRU_TIME_MAX),
+ 0, k, ({
+ struct move_bucket b = { .k.bucket = u64_to_bucket(k.k->p.offset) };
+ int ret = 0;
+
+ saw++;
+
+ if (!bch2_bucket_is_movable(trans, &b, lru_pos_time(k.k->p)))
+ not_movable++;
+ else if (bucket_in_flight(buckets_in_flight, b.k))
+ in_flight++;
+ else {
+ ret = darray_push(buckets, b) ?: buckets->nr >= nr_to_get;
+ if (ret >= 0)
+ sectors += b.sectors;
+ }
+ ret;
+ }));
+
+ pr_debug("have: %zu (%zu) saw %zu in flight %zu not movable %zu got %zu (%zu)/%zu buckets ret %i",
+ buckets_in_flight->nr, buckets_in_flight->sectors,
+ saw, in_flight, not_movable, buckets->nr, sectors, nr_to_get, ret);
+
+ return ret < 0 ? ret : 0;