The qcow2_truncate() code is mostly independent from whether
we're using L2 slices or full L2 tables, but in full and
falloc preallocation modes new L2 tables are allocated using
qcow2_alloc_cluster_link_l2(). Therefore the code needs to be
modified to ensure that all nb_clusters that are processed in each
call can be allocated with just one L2 slice.
Signed-off-by: Alberto Garcia <be...@igalia.com>
Reviewed-by: Eric Blake <ebl...@redhat.com>
---
block/qcow2.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/block/qcow2.c b/block/qcow2.c
index 78f067cae7..529becfa30 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -3261,8 +3261,9 @@ static int qcow2_truncate(BlockDriverState *bs, int64_t
offset,
guest_offset = old_length;
while (nb_new_data_clusters) {
int64_t guest_cluster = guest_offset >> s->cluster_bits;
- int64_t nb_clusters = MIN(nb_new_data_clusters,
- s->l2_size - guest_cluster % s->l2_size);
+ int64_t nb_clusters = MIN(
+ nb_new_data_clusters,
+ s->l2_slice_size - guest_cluster % s->l2_slice_size);
QCowL2Meta allocation = {
.offset = guest_offset,
.alloc_offset = host_offset,
--
2.11.0
