Images with a non-power-of-two block size are invalid and cannot be
opened. Reject such block sizes when creating an image.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
error_setg_errno(errp, EINVAL, "Block size must be a multiple of 1 MB");
return -EINVAL;
}
+ if (!is_power_of_2(block_size)) {
+ error_setg(errp, "Block size must be a power of two");
+ return -EINVAL;
+ }
if (block_size > VHDX_BLOCK_SIZE_MAX) {
error_setg_errno(errp, EINVAL, "Block size must not exceed %d",
VHDX_BLOCK_SIZE_MAX);