[sheepdog] Call to sd_truncate()

[Hadrien KOHL]

Ok I will try this right away.

It's a typo. I meant hundreds.

I did a couple of different tests. But in the end, I noticed that the error
happens event with a simple
dd if=/dev/zero of=/dev/vda




2013/12/13 Liu Yuan <namei.unix at gmail.com>

> On Fri, Dec 13, 2013 at 04:33:18PM +0100, Hadrien KOHL wrote:
> > I sure can, but how can I print those information?
> >
> > I didn't mention that earlier, but the problem does not arise before a
> > couple of hundreds of MB (even though it's a bit random).
>
> you can try following patch and tell the output. what did you mean by
> 'hunreads
> of MB', I notice you just mkfs.ext4 and said then it would cause problem.
>
> Thanks
> Yuan
>
> diff --git a/block/sheepdog.c b/block/sheepdog.c
> index b4ae50f..2036fbf 100644
> --- a/block/sheepdog.c
> +++ b/block/sheepdog.c
> @@ -1774,6 +1774,7 @@ static int sd_truncate(BlockDriverState *bs, int64_t
> offset)
>      unsigned int datalen;
>
>      if (offset < s->inode.vdi_size) {
> +        printf("%ld, %ld\n", offset, s->inode.vdi_size);
>          error_report("shrinking is not supported");
>          return -EINVAL;
>      } else if (offset > SD_MAX_VDI_SIZE) {
>
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