svn commit: r351729 - in head: lib/libc/gen lib/libc/sys sys/compat/freebsd32 sys/kern sys/sys
Shawn Webb
shawn.webb at hardenedbsd.org
Tue Sep 3 14:34:38 UTC 2019
On Tue, Sep 03, 2019 at 09:32:27AM -0500, Justin Hibbits wrote:
> On Tue, 3 Sep 2019 10:20:35 -0400
> Shawn Webb <shawn.webb at hardenedbsd.org> wrote:
>
> > On Tue, Sep 03, 2019 at 07:47:40AM -0400, Shawn Webb wrote:
> > > On Tue, Sep 03, 2019 at 11:45:23AM +0000, Brooks Davis wrote:
> > > > On Tue, Sep 03, 2019 at 07:35:05AM -0400, Shawn Webb wrote:
> > > > > Hey Mateusz,
> > > > >
> > > > > On Tue, Sep 03, 2019 at 04:16:31AM +0000, Mateusz Guzik wrote:
> > > > > > Author: mjg
> > > > > > Date: Tue Sep 3 04:16:30 2019
> > > > > > New Revision: 351729
> > > > > > URL: https://svnweb.freebsd.org/changeset/base/351729
> > > > > >
> > > > > > Log:
> > > > > > Add sysctlbyname system call
> > > > > >
> > > > > > Previously userspace would issue one syscall to resolve the
> > > > > > sysctl and then another one to actually use it. Do it all in
> > > > > > one trip.
> > > > > > Fallback is provided in case newer libc happens to be
> > > > > > running on an older kernel.
> > > > > >
> > > > > > Submitted by: Pawel Biernacki
> > > > > > Reported by: kib, brooks
> > > > > > Differential Revision:
> > > > > > https://reviews.freebsd.org/D17282
> > > > > >
> > > > > > Modified:
> > > > > ... snip ...
> > > > > > head/sys/sys/param.h
> > > > >
> > > > > ... snip ...
> > > > >
> > > > > >
> > > > > > Modified: head/sys/sys/param.h
> > > > > > ==============================================================================
> > > > > > --- head/sys/sys/param.h Mon Sep 2 21:57:57
> > > > > > 2019 (r351728) +++ head/sys/sys/param.h Tue Sep
> > > > > > 3 04:16:30 2019 (r351729) @@ -60,7 +60,7 @@
> > > > > > * in the range 5 to 9.
> > > > > > */
> > > > > > #undef __FreeBSD_version
> > > > > > -#define __FreeBSD_version 1300044 /* Master,
> > > > > > propagated to newvers */ +#define __FreeBSD_version
> > > > > > 1300045 /* Master, propagated to newvers */
> > > > >
> > > > > To an outsider, it seems that __FreeBSD_version tends to be
> > > > > bumped in a separate commit. Am I remembering that right?
> > > >
> > > > It should be bumped in the same commit, but people forget or the
> > > > bump they have in their review turns into a no-op because someone
> > > > else does a bump in the interim (the latter has bit me several
> > > > times).
> > >
> > > Interesting. Thanks for the clarification!
> >
> > One thought for making the version bump a seperate commit is if the
> > original commit needed to be reverted, the commit can be reverted
> > wholesale (well, from the perspective of __FreeBSD_version) without
> > worry of accidentally decrementing the version number to a prior
> > value.
> >
> > That's my "need-more-caffeine" verbose way of saying "separating the
> > version bump from the actual work allows for easier maintenance of the
> > version number, helping ensure an always-increasing number."
> >
> > Sorry if I sound dry here. My ten-month-old puppy is tiring me out way
> > faster than I can tire him out.
> >
> > Thanks,
> >
>
> I always thought convention was separate commits to ease MFCs. The few
> times I've bumped __FreeBSD_version I've done it explicitly as a
> followup commit for that reason. Guess I now know better :)
I should also note that I'm looking at this from an outsider's
perspective, which may not reflect the same perspective as an
insider's. :)
--
Shawn Webb
Cofounder / Security Engineer
HardenedBSD
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