netdev - Re: [PATCH bpf-next v2 00/16] selftests: xsk: various simplifications

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Date:   Thu, 19 Aug 2021 12:13:38 +0200
From:   Maciej Fijalkowski <maciej.fijalkowski@...el.com>
To:     Magnus Karlsson <magnus.karlsson@...il.com>
Cc:     magnus.karlsson@...el.com, bjorn@...nel.org, ast@...nel.org,
        daniel@...earbox.net, netdev@...r.kernel.org,
        jonathan.lemon@...il.com, ciara.loftus@...el.com,
        bpf@...r.kernel.org, yhs@...com, andrii@...nel.org
Subject: Re: [PATCH bpf-next v2 00/16] selftests: xsk: various simplifications

On Tue, Aug 17, 2021 at 11:27:13AM +0200, Magnus Karlsson wrote:
> This patch set mainly contains various simplifications to the xsk
> selftests. The only exception is the introduction of packet streams
> that describes what the Tx process should send and what the Rx process
> should receive. If it receives anything else, the test fails. This
> mechanism can be used to produce tests were all packets are not
> received by the Rx thread or modified in some way. An example of this
> is if an XDP program does XDP_PASS on some of the packets.
> 
> This patch set will be followed by another patch set that implements a
> new structure that will facilitate adding new tests. A couple of new
> tests will also be included in that patch set.
> 
> v1 -> v2:
> 
> * Dropped the patch with per process limit changes as it is not needed
>   [Yonghong]
> * Improved the commit message of patch 1 [Yonghong]
> * Fixed a spelling error in patch 9
> 
> Thanks: Magnus

This is awesome work. Lots of simplification and the pkt stream generation
makes sense to me.

I had little comments on patch 14.

Besides that:
Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@...el.com>

> 
> Magnus Karlsson (16):
>   selftests: xsk: remove color mode
>   selftests: xsk: remove the num_tx_packets option
>   selftests: xsk: remove unused variables
>   selftests: xsk: return correct error codes
>   selftests: xsk: simplify the retry code
>   selftests: xsk: remove end-of-test packet
>   selftests: xsk: disassociate umem size with packets sent
>   selftests: xsk: rename worker_* functions that are not thread entry
>     points
>   selftests: xsk: simplify packet validation in xsk tests
>   selftests: xsk: validate tx stats on tx thread
>   selftests: xsk: decrease batch size
>   selftests: xsk: remove cleanup at end of program
>   selftests: xsk: generate packet directly in umem
>   selftests: xsk: generate packets from specification
>   selftests: xsk: make enums lower case
>   selftests: xsk: preface options with opt
> 
>  tools/testing/selftests/bpf/test_xsk.sh    |  10 +-
>  tools/testing/selftests/bpf/xdpxceiver.c   | 626 +++++++++------------
>  tools/testing/selftests/bpf/xdpxceiver.h   |  61 +-
>  tools/testing/selftests/bpf/xsk_prereqs.sh |  30 +-
>  4 files changed, 310 insertions(+), 417 deletions(-)
> 
> 
> base-commit: 3c3bd542ffbb2ac09631313ede46ae66660ae550
> --
> 2.29.0