On Tue, Oct 26, 2010 at 7:32 PM, David Xu <davi...@freebsd.org> wrote:
> Author: davidxu
> Date: Wed Oct 27 02:32:54 2010
> New Revision: 214409
> URL: http://svn.freebsd.org/changeset/base/214409
>
> Log:
> If input parameter cpusetsize is zero, give userland size of cpuset mask
> kernel is using.
>
> Modified:
> head/sys/kern/kern_cpuset.c
>
> Modified: head/sys/kern/kern_cpuset.c
> ==============================================================================
> --- head/sys/kern/kern_cpuset.c Wed Oct 27 02:07:25 2010 (r214408)
> +++ head/sys/kern/kern_cpuset.c Wed Oct 27 02:32:54 2010 (r214409)
> @@ -889,6 +889,10 @@ cpuset_getaffinity(struct thread *td, st
> int error;
> size_t size;
>
> + if (uap->cpusetsize == 0) {
> + td->td_retval[0] = sizeof(cpuset_t);
> + return (0);
> + }
> if (uap->cpusetsize < sizeof(cpuset_t) ||
> uap->cpusetsize > CPU_MAXSIZE / NBBY)
> return (ERANGE);
Isn't this requirement partly broken now?
[ERANGE] The cpusetsize was either preposterously large or
smaller than the kernel set size.
Why should cpuset(2) be broken in favor of people not passing valid values?
Thanks,
-Garrett
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