netdev - Re: [PATCH v2 1/2] selftests/net: fix missing xdp

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Date:   Wed, 16 Nov 2022 13:57:29 -0800
From:   Saeed Mahameed <saeed@...nel.org>
To:     Wang Yufen <wangyufen@...wei.com>
Cc:     netdev@...r.kernel.org, bpf@...r.kernel.org, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
        shuah@...nel.org, andrii@...nel.org, mykolal@...com,
        ast@...nel.org, daniel@...earbox.net, martin.lau@...ux.dev,
        Daniel Müller <deso@...teo.net>
Subject: Re: [PATCH v2 1/2] selftests/net: fix missing xdp_dummy

On 15 Nov 18:23, Wang Yufen wrote:
>After commit afef88e65554 ("selftests/bpf: Store BPF object files with
>.bpf.o extension"), we should use xdp_dummy.bpf.o instade of xdp_dummy.o.
>
>In addition, use the BPF_FILE variable to save the BPF object file name,
>which can be better identified and modified.
>
>Fixes: afef88e65554 ("selftests/bpf: Store BPF object files with .bpf.o extension")
>Signed-off-by: Wang Yufen <wangyufen@...wei.com>
>Cc: Daniel Müller <deso@...teo.net>
>---
> tools/testing/selftests/net/udpgro.sh         | 6 ++++--
> tools/testing/selftests/net/udpgro_bench.sh   | 6 ++++--
> tools/testing/selftests/net/udpgro_frglist.sh | 6 ++++--
> tools/testing/selftests/net/udpgro_fwd.sh     | 3 ++-
> tools/testing/selftests/net/veth.sh           | 9 +++++----
> 5 files changed, 19 insertions(+), 11 deletions(-)
>
>diff --git a/tools/testing/selftests/net/udpgro.sh b/tools/testing/selftests/net/udpgro.sh
>index 6a443ca..a66d62e 100755
>--- a/tools/testing/selftests/net/udpgro.sh
>+++ b/tools/testing/selftests/net/udpgro.sh
>@@ -5,6 +5,8 @@
>
> readonly PEER_NS="ns-peer-$(mktemp -u XXXXXX)"
>
>+BPF_FILE="../bpf/xdp_dummy.bpf.o"
>+
> # set global exit status, but never reset nonzero one.
> check_err()
> {
>@@ -34,7 +36,7 @@ cfg_veth() {
> 	ip -netns "${PEER_NS}" addr add dev veth1 192.168.1.1/24
> 	ip -netns "${PEER_NS}" addr add dev veth1 2001:db8::1/64 nodad
> 	ip -netns "${PEER_NS}" link set dev veth1 up
>-	ip -n "${PEER_NS}" link set veth1 xdp object ../bpf/xdp_dummy.o section xdp
>+	ip -n "${PEER_NS}" link set veth1 xdp object ${BPF_FILE} section xdp
> }
>
> run_one() {
>@@ -195,7 +197,7 @@ run_all() {
> 	return $ret
> }
>
>-if [ ! -f ../bpf/xdp_dummy.o ]; then
>+if [ ! -f ${BPF_FILE} ]; then
> 	echo "Missing xdp_dummy helper. Build bpf selftest first"

nit: I would improve the error message here to print  ${BPF_FILE}.
There are 3 more spots in the rest of this patch.