From: "Xia, Chenbo" <chenbo.xia@intel.com>
To: "Burakov, Anatoly" <anatoly.burakov@intel.com>,
"dev@dpdk.org" <dev@dpdk.org>,
"Yigit, Ferruh" <ferruh.yigit@intel.com>,
David Marchand <david.marchand@redhat.com>,
Thomas Monjalon <thomas@monjalon.net>
Subject: Re: [dpdk-dev] [PATCH v1 1/2] vfio: make API return values consistent
Date: Thu, 28 Oct 2021 11:11:07 +0000 [thread overview]
Message-ID: <SN6PR11MB35040B9B8DFD24DBED992BB99C869@SN6PR11MB3504.namprd11.prod.outlook.com> (raw)
In-Reply-To: <8b8fd2e4-e7eb-26cd-ad32-2f284eacc24c@intel.com>
> -----Original Message-----
> From: Burakov, Anatoly <anatoly.burakov@intel.com>
> Sent: Thursday, October 28, 2021 6:30 PM
> To: Xia, Chenbo <chenbo.xia@intel.com>; dev@dpdk.org
> Subject: Re: [dpdk-dev] [PATCH v1 1/2] vfio: make API return values consistent
>
> Hi Chenbo,
>
> > And do we need backport? As 'return -1' does not align with the API doxygen.
> >
> > Thanks,
> > Chenbo
> >
> Maybe it's the FreeBSD implementation that needs to be adjusted then,
> because none of those functions are valid on FreeBSD, and the
> documentation for VFIO functions explicitly mentions that on FreeBSD,
> they should return an error. I went with adjusting Linux implementation
> to minimize the amount of changes we have to make (and only change code
> path that no one uses in the first place), but maybe that was a wrong
> decision.
>
> I'm not sure if changing the API return value to match what was
> documented counts as an API change, so maybe backport to stable is not
> advised here.
It's not a API change. My point is whether VFIO is present, users just use
the API to check if vfio support is there. In a kernel version that does not
support VFIO, he uses 'if(rte_vfio_is_enabled(XXX))' to check as the doxygen
says its return value should be 1 as true or 0 as false. He will get true (-1)
but VFIO is not there. That's why I think it's a bug and should be backported.
But I think we can first discuss if we should drop the dummy implementation
as DPDK requires Linux kernel version >= 4.4 now so VFIO is always present.
I think it depends on by saying 'DPDK requires kernel version >= 4.4'. It's
a real _requirement_ or only a recommendation?
Ferruh, David & Thomas, What do you think?
Thanks,
Chenbo
>
> --
> Thanks,
> Anatoly
next prev parent reply other threads:[~2021-10-28 11:26 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-16 10:36 Anatoly Burakov
2021-09-16 10:36 ` [dpdk-dev] [PATCH v1 2/2] vfio: add errno on unsupported platforms Anatoly Burakov
2021-09-16 10:39 ` Bruce Richardson
2021-09-22 3:31 ` Xia, Chenbo
2021-09-22 3:30 ` [dpdk-dev] [PATCH v1 1/2] vfio: make API return values consistent Xia, Chenbo
2021-09-22 9:26 ` Ferruh Yigit
2021-09-22 11:30 ` Xia, Chenbo
2021-10-28 8:21 ` David Marchand
2021-10-28 10:29 ` Burakov, Anatoly
2021-10-28 11:11 ` Xia, Chenbo [this message]
2021-10-28 11:32 ` Ferruh Yigit
2021-10-28 13:00 ` Burakov, Anatoly
2021-10-28 14:53 ` Thomas Monjalon
2021-10-28 15:40 ` Burakov, Anatoly
2021-10-28 16:38 ` Stephen Hemminger
2021-10-28 13:49 ` [dpdk-dev] [PATCH v2 1/4] vfio: drop fallback Linux implementation Anatoly Burakov
2021-10-28 13:49 ` [dpdk-dev] [PATCH v2 2/4] vfio: fix wrong return value for FreeBSD Anatoly Burakov
2021-10-28 13:49 ` [dpdk-dev] [PATCH v2 3/4] vfio: fix documentation to match intended behavior Anatoly Burakov
2021-10-28 13:49 ` [dpdk-dev] [PATCH v2 4/4] vfio: add errno on unsupported platforms Anatoly Burakov
2021-10-28 14:13 ` Burakov, Anatoly
2021-10-28 14:15 ` [dpdk-dev] [PATCH v3 1/4] vfio: drop fallback Linux implementation Anatoly Burakov
2021-10-28 14:15 ` [dpdk-dev] [PATCH v3 2/4] vfio: fix wrong return value for FreeBSD Anatoly Burakov
2021-11-05 2:50 ` Xia, Chenbo
2021-10-28 14:15 ` [dpdk-dev] [PATCH v3 3/4] vfio: fix documentation to match intended behavior Anatoly Burakov
2021-11-05 2:57 ` [dpdk-dev] [dpdk-stable] " Xia, Chenbo
2021-10-28 14:15 ` [dpdk-dev] [PATCH v3 4/4] vfio: add errno on unsupported platforms Anatoly Burakov
2021-11-08 15:55 ` [dpdk-dev] [dpdk-stable] " David Marchand
2021-11-01 6:27 ` [dpdk-dev] [PATCH v3 1/4] vfio: drop fallback Linux implementation Xia, Chenbo
2021-11-01 13:57 ` Burakov, Anatoly
2021-11-05 2:48 ` Xia, Chenbo
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