netdev - [PATCH bpf 5/7] selftests/bpf/test_tcp_check_syncookie: use temp netns for testing

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Date:   Tue, 25 Jan 2022 16:17:15 +0800
From:   Hangbin Liu <liuhangbin@...il.com>
To:     netdev@...r.kernel.org
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>, bpf@...r.kernel.org,
        Jakub Kicinski <kuba@...nel.org>,
        "David S . Miller" <davem@...emloft.net>,
        Mathieu Xhonneux <m.xhonneux@...il.com>,
        Lorenz Bauer <lmb@...udflare.com>,
        William Tu <u9012063@...il.com>,
        Toshiaki Makita <toshiaki.makita1@...il.com>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        Hangbin Liu <liuhangbin@...il.com>
Subject: [PATCH bpf 5/7] selftests/bpf/test_tcp_check_syncookie: use temp netns for testing

Use temp netns instead of hard code name for testing in case the
netns already exists.

Signed-off-by: Hangbin Liu <liuhangbin@...il.com>
---
 tools/testing/selftests/bpf/test_tcp_check_syncookie.sh | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/bpf/test_tcp_check_syncookie.sh b/tools/testing/selftests/bpf/test_tcp_check_syncookie.sh
index 6413c1472554..102e6588e2fe 100755
--- a/tools/testing/selftests/bpf/test_tcp_check_syncookie.sh
+++ b/tools/testing/selftests/bpf/test_tcp_check_syncookie.sh
@@ -4,6 +4,7 @@
 # Copyright (c) 2019 Cloudflare
 
 set -eu
+readonly NS1="ns1-$(mktemp -u XXXXXX)"
 
 wait_for_ip()
 {
@@ -28,12 +29,12 @@ get_prog_id()
 
 ns1_exec()
 {
-	ip netns exec ns1 "$@"
+	ip netns exec ${NS1} "$@"
 }
 
 setup()
 {
-	ip netns add ns1
+	ip netns add ${NS1}
 	ns1_exec ip link set lo up
 
 	ns1_exec sysctl -w net.ipv4.tcp_syncookies=2
-- 
2.31.1