linux-kernel - [PATCH bpf-next 1/3] selftests/bpf: tc_helpers: Add create_and_open_tid

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Message-Id: <20250217-tc_links-v1-1-27f7965e3dcd@bootlin.com>
Date: Mon, 17 Feb 2025 13:37:38 +0100
From: "Bastien Curutchet (eBPF Foundation)" <bastien.curutchet@...tlin.com>
To: Alexei Starovoitov <ast@...nel.org>, 
 Daniel Borkmann <daniel@...earbox.net>, Andrii Nakryiko <andrii@...nel.org>, 
 Martin KaFai Lau <martin.lau@...ux.dev>, 
 Eduard Zingerman <eddyz87@...il.com>, Song Liu <song@...nel.org>, 
 Yonghong Song <yonghong.song@...ux.dev>, 
 John Fastabend <john.fastabend@...il.com>, KP Singh <kpsingh@...nel.org>, 
 Stanislav Fomichev <sdf@...ichev.me>, Hao Luo <haoluo@...gle.com>, 
 Jiri Olsa <jolsa@...nel.org>, Mykola Lysenko <mykolal@...com>, 
 Shuah Khan <shuah@...nel.org>
Cc: Thomas Petazzoni <thomas.petazzoni@...tlin.com>, 
 Alexis Lothore <alexis.lothore@...tlin.com>, bpf@...r.kernel.org, 
 linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org, 
 "Bastien Curutchet (eBPF Foundation)" <bastien.curutchet@...tlin.com>
Subject: [PATCH bpf-next 1/3] selftests/bpf: tc_helpers: Add
 create_and_open_tid_ns()

Add a create_and_open_tid_ns() helper that creates a new network
namespace and open it.

Use the append_tid() helper to ensure the uniqueness of the namespace
name.

Signed-off-by: Bastien Curutchet (eBPF Foundation) <bastien.curutchet@...tlin.com>
---
 tools/testing/selftests/bpf/prog_tests/tc_helpers.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/tools/testing/selftests/bpf/prog_tests/tc_helpers.h b/tools/testing/selftests/bpf/prog_tests/tc_helpers.h
index 924d0e25320c71691998d6fce4d0aae367457862..8689ecd88fa89f4e622729d4f1b6d33c25fa89d8 100644
--- a/tools/testing/selftests/bpf/prog_tests/tc_helpers.h
+++ b/tools/testing/selftests/bpf/prog_tests/tc_helpers.h
@@ -3,6 +3,7 @@
 #ifndef TC_HELPERS
 #define TC_HELPERS
 #include <test_progs.h>
+#include "network_helpers.h"
 
 #ifndef loopback
 # define loopback 1
@@ -75,4 +76,15 @@ static inline void tc_skel_reset_all_seen(struct test_tc_link *skel)
 	memset(skel->bss, 0, sizeof(*skel->bss));
 }
 
+static inline struct netns_obj *create_and_open_tid_ns(char *ns_name, size_t sz)
+{
+	if (!ns_name)
+		return NULL;
+
+	if (append_tid(ns_name, sz))
+		return NULL;
+
+	return netns_new(ns_name, true);
+}
+
 #endif /* TC_HELPERS */

-- 
2.48.1