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Date: Fri, 20 Nov 2020 10:54:09 -0800
From: Yonghong Song <yhs@...com>
To: Weqaar Janjua <weqaar.janjua@...il.com>, <bpf@...r.kernel.org>,
<netdev@...r.kernel.org>, <daniel@...earbox.net>, <ast@...nel.org>,
<magnus.karlsson@...il.com>, <bjorn.topel@...el.com>
CC: Weqaar Janjua <weqaar.a.janjua@...el.com>, <shuah@...nel.org>,
<skhan@...uxfoundation.org>, <linux-kselftest@...r.kernel.org>,
<anders.roxell@...aro.org>, <jonathan.lemon@...il.com>
Subject: Re: [PATCH bpf-next v2 2/5] selftests/bpf: xsk selftests - SKB POLL,
NOPOLL
On 11/20/20 5:00 AM, Weqaar Janjua wrote:
> Adds following tests:
>
> 1. AF_XDP SKB mode
> Generic mode XDP is driver independent, used when the driver does
> not have support for XDP. Works on any netdevice using sockets and
> generic XDP path. XDP hook from netif_receive_skb().
> a. nopoll - soft-irq processing
> b. poll - using poll() syscall
>
> Signed-off-by: Weqaar Janjua <weqaar.a.janjua@...el.com>
> ---
> tools/testing/selftests/bpf/Makefile | 5 +-
> .../selftests/bpf/test_xsk_prerequisites.sh | 15 +-
> .../selftests/bpf/test_xsk_skb_nopoll.sh | 20 +
> ..._xsk_framework.sh => test_xsk_skb_poll.sh} | 12 +-
> tools/testing/selftests/bpf/xdpxceiver.c | 961 ++++++++++++++++++
> tools/testing/selftests/bpf/xdpxceiver.h | 151 +++
> tools/testing/selftests/bpf/xsk_env.sh | 17 +
> 7 files changed, 1174 insertions(+), 7 deletions(-)
> create mode 100755 tools/testing/selftests/bpf/test_xsk_skb_nopoll.sh
> rename tools/testing/selftests/bpf/{test_xsk_framework.sh => test_xsk_skb_poll.sh} (61%)
> create mode 100644 tools/testing/selftests/bpf/xdpxceiver.c
> create mode 100644 tools/testing/selftests/bpf/xdpxceiver.h
>
> diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
> index 51436db24f32..17af570a32d7 100644
> --- a/tools/testing/selftests/bpf/Makefile
> +++ b/tools/testing/selftests/bpf/Makefile
> @@ -73,7 +73,8 @@ TEST_PROGS := test_kmod.sh \
> test_bpftool.sh \
> test_bpftool_metadata.sh \
> test_xsk_prerequisites.sh \
> - test_xsk_framework.sh
> + test_xsk_skb_nopoll.sh \
> + test_xsk_skb_poll.sh
>
> TEST_PROGS_EXTENDED := with_addr.sh \
> with_tunnels.sh \
> @@ -84,7 +85,7 @@ TEST_PROGS_EXTENDED := with_addr.sh \
> # Compile but not part of 'make run_tests'
> TEST_GEN_PROGS_EXTENDED = test_sock_addr test_skb_cgroup_id_user \
> flow_dissector_load test_flow_dissector test_tcp_check_syncookie_user \
> - test_lirc_mode2_user xdping test_cpp runqslower bench
> + test_lirc_mode2_user xdping test_cpp runqslower bench xdpxceiver
>
> TEST_CUSTOM_PROGS = urandom_read
>
> diff --git a/tools/testing/selftests/bpf/test_xsk_prerequisites.sh b/tools/testing/selftests/bpf/test_xsk_prerequisites.sh
> index 00bfcf53127c..a9ce8887dffc 100755
> --- a/tools/testing/selftests/bpf/test_xsk_prerequisites.sh
> +++ b/tools/testing/selftests/bpf/test_xsk_prerequisites.sh
> @@ -8,8 +8,17 @@
> #
> # Topology:
> # ---------
> -# ----------- -----------
> -# | xskX | --------- | xskY |
> +# -----------
> +# _ | Process | _
> +# / ----------- \
> +# / | \
> +# / | \
> +# ----------- | -----------
> +# | Thread1 | | | Thread2 |
> +# ----------- | -----------
> +# | | |
> +# ----------- | -----------
> +# | xskX | | | xskY |
> # ----------- | -----------
> # | | |
> # ----------- | ----------
> @@ -40,6 +49,8 @@
> # conflict with any existing interface
> # * tests the veth and xsk layers of the topology
> #
> +# See the source xdpxceiver.c for information on each test
> +#
> # Kernel configuration:
> # ---------------------
> # See "config" file for recommended kernel config options.
> diff --git a/tools/testing/selftests/bpf/test_xsk_skb_nopoll.sh b/tools/testing/selftests/bpf/test_xsk_skb_nopoll.sh
> new file mode 100755
> index 000000000000..96600b0f5136
> --- /dev/null
> +++ b/tools/testing/selftests/bpf/test_xsk_skb_nopoll.sh
> @@ -0,0 +1,20 @@
> +#!/bin/bash
> +# SPDX-License-Identifier: GPL-2.0
> +# Copyright(c) 2020 Intel Corporation.
> +
> +# See test_xsk_prerequisites.sh for detailed information on tests
> +
> +. xsk_prereqs.sh
> +. xsk_env.sh
> +
> +TEST_NAME="SKB NOPOLL"
> +
> +vethXDPgeneric ${VETH0} ${VETH1} ${NS1}
> +
> +params=("-S")
> +execxdpxceiver params
> +
> +retval=$?
> +test_status $retval "${TEST_NAME}"
> +
> +test_exit $retval 0
> diff --git a/tools/testing/selftests/bpf/test_xsk_framework.sh b/tools/testing/selftests/bpf/test_xsk_skb_poll.sh
> similarity index 61%
> rename from tools/testing/selftests/bpf/test_xsk_framework.sh
> rename to tools/testing/selftests/bpf/test_xsk_skb_poll.sh
> index 2e3f099d001c..d152c8a24251 100755
> --- a/tools/testing/selftests/bpf/test_xsk_framework.sh
> +++ b/tools/testing/selftests/bpf/test_xsk_skb_poll.sh
> @@ -7,11 +7,17 @@
> . xsk_prereqs.sh
> . xsk_env.sh
Here both xsk_prereqs.sh and xsk_env.sh are executed.
But xsk_env.sh also calls xsk_prereqs.sh. This double
execution of xsk_prereqs.sh is required or is an
oversight?
>
> -TEST_NAME="XSK FRAMEWORK"
> +TEST_NAME="SKB POLL"
>
> -test_status $ksft_pass "${TEST_NAME}"
> +vethXDPgeneric ${VETH0} ${VETH1} ${NS1}
> +
> +params=("-S" "-p")
> +execxdpxceiver params
> +
> +retval=$?
> +test_status $retval "${TEST_NAME}"
>
> # Must be called in the last test to execute
> cleanup_exit ${VETH0} ${VETH1} ${NS1}
>
> -test_exit $ksft_pass 0
> +test_exit $retval 0
> diff --git a/tools/testing/selftests/bpf/xdpxceiver.c b/tools/testing/selftests/bpf/xdpxceiver.c
[...]
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