No longer refuse to open images with a different refcount entry width
than 16 bits; only reject images with a refcount width larger than 64
bits (which is prohibited by the specification).
Signed-off-by: Max Reitz <mre...@redhat.com>
Reviewed-by: Eric Blake <ebl...@redhat.com>
---
block/qcow2.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/block/qcow2.c b/block/qcow2.c
index d70e927..18c69fb 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -677,10 +677,10 @@ static int qcow2_open(BlockDriverState *bs, QDict
*options, int flags,
}
/* Check support for various header values */
- if (header.refcount_order != 4) {
- report_unsupported(bs, errp, "%d bit reference counts",
- 1 << header.refcount_order);
- ret = -ENOTSUP;
+ if (header.refcount_order > 6) {
+ error_setg(errp, "Reference count entry width too large; may not "
+ "exceed 64 bits");
+ ret = -EINVAL;
goto fail;
}
s->refcount_order = header.refcount_order;
--
1.9.3
