From: Akhil Goyal <gakhil@marvell.com>
To: Ferruh Yigit <ferruh.yigit@amd.com>,
David Marchand <david.marchand@redhat.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>, Dodji Seketeli <dodji@redhat.com>,
"thomas@monjalon.net" <thomas@monjalon.net>,
"hemant.agrawal@nxp.com" <hemant.agrawal@nxp.com>,
Anoob Joseph <anoobj@marvell.com>,
"pablo.de.lara.guarch@intel.com" <pablo.de.lara.guarch@intel.com>,
"fiona.trahe@intel.com" <fiona.trahe@intel.com>,
"declan.doherty@intel.com" <declan.doherty@intel.com>,
"matan@nvidia.com" <matan@nvidia.com>,
"g.singh@nxp.com" <g.singh@nxp.com>,
"fanzhang.oss@gmail.com" <fanzhang.oss@gmail.com>,
"jianjay.zhou@huawei.com" <jianjay.zhou@huawei.com>,
"asomalap@amd.com" <asomalap@amd.com>,
"ruifeng.wang@arm.com" <ruifeng.wang@arm.com>,
"konstantin.v.ananyev@yandex.ru" <konstantin.v.ananyev@yandex.ru>,
"radu.nicolau@intel.com" <radu.nicolau@intel.com>,
"ajit.khaparde@broadcom.com" <ajit.khaparde@broadcom.com>,
Nagadheeraj Rottela <rnagadheeraj@marvell.com>,
"mdr@ashroe.eu" <mdr@ashroe.eu>
Subject: RE: [EXTERNAL] Re: [PATCH] [RFC] cryptodev: replace LIST_END enumerators with APIs
Date: Thu, 10 Oct 2024 06:18:52 +0000 [thread overview]
Message-ID: <CO6PR18MB4484C8F17CA2021E7AD5FCE8D8782@CO6PR18MB4484.namprd18.prod.outlook.com> (raw)
In-Reply-To: <02390115-de83-48be-b410-b1b94e5a9dea@amd.com>
> >>> Now added inline APIs for getting the list end which need to be updated
> >>> for each new entry to the enum. This shall help in avoiding ABI break
> >>> for adding new algo.
> >>>
> >>
> >> Hi Akhil,
> >>
> >> *I think* this hides the problem instead of fixing it, and this may be
> >> partially because of the tooling (libabigail) limitation.
> >>
> >> This patch prevents the libabigail warning, true, but it doesn't improve
> >> anything from the application's perspective.
> >> Before or after this patch, application knows a fixed value as END value.
> >>
> >> Not all changes in the END (MAX) enum values cause ABI break, but tool
> >> warns on all, that is why I think this may be tooling limitation [1].
> >> (Just to stress, I am NOT talking about regular enum values change, I am
> >> talking about only END (MAX) value changes caused by appending new enum
> >> items.)
> >>
> >> As far as I can see (please Dodji, David correct me if I am wrong) ABI
> >> break only happens if application and library exchange enum values in
> >> the API (directly or within a struct).
> >
> > - There is also the following issue:
> > A library publicly exports an array sized against a END (MAX) enum in the API.
> > https://developers.redhat.com/blog/2019/05/06/how-c-array-sizes-become-part-of-the-binary-interface-of-a-library
> >
>
> I see. And Dodji explained this requires source code to detect.
>
> I don't remember seeing a public array whose size is defined by an enum,
> are you aware of any instance of this usage?
https://patches.dpdk.org/project/dpdk/patch/20241009071151.1106-1-gmuthukrishn@marvell.com/
This was merged yesterday.
next prev parent reply other threads:[~2024-10-10 6:19 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-05 10:14 Akhil Goyal
2024-09-05 15:09 ` Morten Brørup
2024-09-05 15:26 ` Kusztal, ArkadiuszX
2024-09-06 6:32 ` fengchengwen
2024-09-06 7:45 ` [EXTERNAL] " Akhil Goyal
2024-10-04 3:56 ` Ferruh Yigit
2024-09-06 7:54 ` Morten Brørup
2024-09-23 20:41 ` Akhil Goyal
2024-10-03 7:00 ` Akhil Goyal
2024-10-06 11:10 ` Morten Brørup
2024-10-09 11:21 ` Akhil Goyal
2024-10-04 4:00 ` Ferruh Yigit
2024-10-04 17:26 ` [EXTERNAL] " Akhil Goyal
2024-10-04 3:54 ` Ferruh Yigit
2024-10-04 7:04 ` David Marchand
2024-10-04 17:27 ` [EXTERNAL] " Akhil Goyal
2024-10-10 0:49 ` Ferruh Yigit
2024-10-10 6:18 ` Akhil Goyal [this message]
2024-10-28 11:15 ` [EXTERNAL] " Dodji Seketeli
2024-10-04 9:38 ` Dodji Seketeli
2024-10-04 17:45 ` [EXTERNAL] " Akhil Goyal
2024-10-28 10:55 ` Dodji Seketeli
2024-10-10 0:35 ` Ferruh Yigit
2024-10-28 10:12 ` Dodji Seketeli
2024-10-09 11:24 ` [PATCH] cryptodev: remove unnecessary list end Akhil Goyal
2024-10-09 12:52 ` Morten Brørup
2024-10-09 20:38 ` Akhil Goyal
2024-10-09 14:06 ` Hemant Agrawal
2024-10-10 0:51 ` Ferruh Yigit
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