Il 19/08/2012 00:19, ronnie sahlberg ha scritto:
>> > Yeah, I think in this case find_image_format should just use raw.
> Ok, so that is basically what the patch does. It forces bs->sg==true
> so that we pick "raw" right there instead of trying to read from the
> device.
>
> So you are happy with the patch ?
No, the solution should be the same that allows "touch ff + qemu-kvm
-hda ff" to work. This is implemented here:
if (ret >= 0 && ret < aiocb->aio_nbytes &&
aiocb->common.bs->growable) {
/* A short read means that we have reached EOF. Pad the buffer
* with zeros for bytes after EOF. */
iov_memset(aiocb->aio_iov, aiocb->aio_niov, ret,
0, aiocb->aio_nbytes - ret);
ret = aiocb->aio_nbytes;
}
and block/iscsi.c should do the same.
Paolo
