Re: [Qemu-devel] [PATCH v4 1/2] blockdev: Error out on negative throttling option values

[Fam Zheng <famz@redhat.com>]

On Fri, 01/15 15:28, Kevin Wolf wrote:
> Am 15.01.2016 um 03:09 hat Fam Zheng geschrieben:
> > The implicit casting from unsigned int to double changes negative values
> > into large positive numbers and accepts them.  We should instead print
> > an error.
> > 
> > Check the number range so this case is caught and reported.
> > 
> > Signed-off-by: Fam Zheng <famz@redhat.com>
> > Reviewed-by: Max Reitz <mreitz@redhat.com>
> > ---
> >  blockdev.c              |  3 ++-
> >  include/qemu/throttle.h |  2 ++
> >  util/throttle.c         | 16 ++++++----------
> >  3 files changed, 10 insertions(+), 11 deletions(-)
> > 
> > diff --git a/blockdev.c b/blockdev.c
> > index 2df0c6d..b925e5d 100644
> > --- a/blockdev.c
> > +++ b/blockdev.c
> > @@ -348,7 +348,8 @@ static bool check_throttle_config(ThrottleConfig *cfg, Error **errp)
> >      }
> >  
> >      if (!throttle_is_valid(cfg)) {
> > -        error_setg(errp, "bps/iops/maxs values must be 0 or greater");
> > +        error_setg(errp, "bps/iops/max values must be within [0, %" PRId64
> > +                         ")", (int64_t)THROTTLE_VALUE_MAX);
> 
> I think that should be "]". If you agree, I'll fix it up while applying.

Yes, that's right. Thanks.

Fam

> 
> >          return false;
> >      }
> 
> Kevin
>