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-rw-r--r--block/qcow2-cache.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/block/qcow2-cache.c b/block/qcow2-cache.c
index b1aa42477e..d9dafa31e5 100644
--- a/block/qcow2-cache.c
+++ b/block/qcow2-cache.c
@@ -120,14 +120,20 @@ void qcow2_cache_clean_unused(Qcow2Cache *c)
c->cache_clean_lru_counter = c->lru_counter;
}
-Qcow2Cache *qcow2_cache_create(BlockDriverState *bs, int num_tables)
+Qcow2Cache *qcow2_cache_create(BlockDriverState *bs, int num_tables,
+ unsigned table_size)
{
BDRVQcow2State *s = bs->opaque;
Qcow2Cache *c;
+ assert(num_tables > 0);
+ assert(is_power_of_2(table_size));
+ assert(table_size >= (1 << MIN_CLUSTER_BITS));
+ assert(table_size <= s->cluster_size);
+
c = g_new0(Qcow2Cache, 1);
c->size = num_tables;
- c->table_size = s->cluster_size;
+ c->table_size = table_size;
c->entries = g_try_new0(Qcow2CachedTable, num_tables);
c->table_array = qemu_try_blockalign(bs->file->bs,
(size_t) num_tables * c->table_size);