BlockStatsList *qmp_query_blockstats(bool has_query_nodes, bool query_nodes, Error **errp) { BlockStatsList *head = NULL, **p_next = &head; BlockBackend *blk = NULL; BlockDriverState *bs = NULL; /* Just to be safe if query_nodes is not always initialized */ query_nodes = has_query_nodes && query_nodes; while (next_query_bds(&blk, &bs, query_nodes)) { BlockStatsList *info = g_malloc0(sizeof(*info)); AioContext *ctx = blk ? blk_get_aio_context(blk) : bdrv_get_aio_context(bs); aio_context_acquire(ctx); info->value = bdrv_query_stats(blk, bs, !query_nodes); aio_context_release(ctx); *p_next = info; p_next = &info->next; } return head; }