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From: "Trahe, Fiona" <fiona.trahe@intel.com>
To: Thomas Monjalon <thomas@monjalon.net>, David Marchand
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Thread-Topic: [dpdk-dev] [PATCH v2 4/4] add ABI checks
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Subject: Re: [dpdk-dev] [PATCH v2 4/4] add ABI checks
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> We are working on a patch, when it is ready we will send it.
> If it's not ready by end of your today, of course, go ahead with (b) and
> we will work towards 20.05.

We will not be sending a patch today.
The patch we're working on will provide two versions of rte_cryptodev_info_=
get(),
both call the same PMD function from the dev_ops info_get fn ptr.
The default version operates s as normal, the 19.11 version searches
through the list returned by the PMD, looking for sym.aead.algo =3D ChaChaP=
oly, it needs to strip it from the list.
As PMDs just pass a ptr to their capabilities list ( it isn't a linked list=
, but an array
with an end marker  =3D RTE_CRYPTODEV_END_OF_CAPABILITIES_LIST) if the API
layer detects Chacha it must allocate some space and store a local copy of =
the
trimmed list. This must be stored only once per device.

This versioning will apply to any PMD which wants to take advantage of the =
new API between now and 20.11.

Note, I expect the ABI checker tools will still complain of ABI breakage as=
 the LIST_END value will still change.

We are also reviewing all other cryptodev APIs in case there is any other A=
PI which needs versioning.
=20
Anyone see any problem with this approach?