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Message-Id: <20250128-redirect-multi-v3-9-c1ce69997c01@bootlin.com>
Date: Tue, 28 Jan 2025 10:57:33 +0100
From: "Bastien Curutchet (eBPF Foundation)" <bastien.curutchet@...tlin.com>
To: Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
"David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>,
Jesper Dangaard Brouer <hawk@...nel.org>,
John Fastabend <john.fastabend@...il.com>,
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>, 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: Alexis Lothore <alexis.lothore@...tlin.com>,
Thomas Petazzoni <thomas.petazzoni@...tlin.com>, netdev@...r.kernel.org,
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 v3 09/14] selftests/bpf: test_xdp_veth: Use unique
names
The network namespaces and the veth used by the tests have hardcoded
names that can conflict with other tests during parallel runs.
Use the append_tid() helper to ensure the uniqueness of these names.
Use the static network configuration table as a template on which
thread IDs are appended in each test.
Set a fixed size to remote_addr field so the struct veth_configuration
can also have a fixed size.
Signed-off-by: Bastien Curutchet (eBPF Foundation) <bastien.curutchet@...tlin.com>
---
.../selftests/bpf/prog_tests/test_xdp_veth.c | 52 ++++++++++++++--------
1 file changed, 34 insertions(+), 18 deletions(-)
diff --git a/tools/testing/selftests/bpf/prog_tests/test_xdp_veth.c b/tools/testing/selftests/bpf/prog_tests/test_xdp_veth.c
index 59fa742b16bd46853b8cfd0ea56a497351c7fb2a..b609cff198e44f71815e4b13a4b7c907223403d6 100644
--- a/tools/testing/selftests/bpf/prog_tests/test_xdp_veth.c
+++ b/tools/testing/selftests/bpf/prog_tests/test_xdp_veth.c
@@ -35,40 +35,43 @@
#include "xdp_tx.skel.h"
#define VETH_PAIRS_COUNT 3
-#define VETH_NAME_MAX_LEN 16
+#define VETH_NAME_MAX_LEN 32
+#define IP_MAX_LEN 16
#define IP_SRC "10.1.1.11"
#define IP_DST "10.1.1.33"
+#define NO_IP "NO_IP"
#define PROG_NAME_MAX_LEN 128
+#define NS_NAME_MAX_LEN 32
struct veth_configuration {
char local_veth[VETH_NAME_MAX_LEN]; /* Interface in main namespace */
char remote_veth[VETH_NAME_MAX_LEN]; /* Peer interface in dedicated namespace*/
- const char *namespace; /* Namespace for the remote veth */
+ char namespace[NS_NAME_MAX_LEN]; /* Namespace for the remote veth */
int next_veth; /* Local interface to redirect traffic to */
- char *remote_addr; /* IP address of the remote veth */
+ char remote_addr[IP_MAX_LEN]; /* IP address of the remote veth */
};
-static struct veth_configuration net_config[VETH_PAIRS_COUNT] = {
+static const struct veth_configuration default_config[VETH_PAIRS_COUNT] = {
{
- .local_veth = "veth1",
+ .local_veth = "veth1-",
.remote_veth = "veth11",
.next_veth = 1,
.remote_addr = IP_SRC,
- .namespace = "ns-veth11"
+ .namespace = "ns-veth11-"
},
{
- .local_veth = "veth2",
+ .local_veth = "veth2-",
.remote_veth = "veth22",
.next_veth = 2,
- .remote_addr = NULL,
- .namespace = "ns-veth22"
+ .remote_addr = NO_IP,
+ .namespace = "ns-veth22-"
},
{
- .local_veth = "veth3",
+ .local_veth = "veth3-",
.remote_veth = "veth33",
.next_veth = 0,
.remote_addr = IP_DST,
- .namespace = "ns-veth33"
+ .namespace = "ns-veth33-"
}
};
@@ -80,6 +83,7 @@ struct prog_configuration {
};
static int attach_programs_to_veth_pair(struct bpf_object **objs, size_t nb_obj,
+ struct veth_configuration *net_config,
struct prog_configuration *prog, int index)
{
struct bpf_program *local_prog, *remote_prog;
@@ -132,17 +136,27 @@ static int attach_programs_to_veth_pair(struct bpf_object **objs, size_t nb_obj,
return 0;
}
-static int create_network(void)
+static int create_network(struct veth_configuration *net_config)
{
- int i;
+ int i, err;
+
+ memcpy(net_config, default_config, VETH_PAIRS_COUNT * sizeof(struct veth_configuration));
/* First create and configure all interfaces */
for (i = 0; i < VETH_PAIRS_COUNT; i++) {
+ err = append_tid(net_config[i].namespace, strlen(net_config[i].namespace));
+ if (!ASSERT_OK(err, "append TID to ns name"))
+ return -1;
+
+ err = append_tid(net_config[i].local_veth, strlen(net_config[i].local_veth));
+ if (!ASSERT_OK(err, "append TID to local veth name"))
+ return -1;
+
SYS(fail, "ip netns add %s", net_config[i].namespace);
SYS(fail, "ip link add %s type veth peer name %s netns %s",
net_config[i].local_veth, net_config[i].remote_veth, net_config[i].namespace);
SYS(fail, "ip link set dev %s up", net_config[i].local_veth);
- if (net_config[i].remote_addr)
+ if (memcmp(net_config[i].remote_addr, NO_IP, 5))
SYS(fail, "ip -n %s addr add %s/24 dev %s", net_config[i].namespace,
net_config[i].remote_addr, net_config[i].remote_veth);
SYS(fail, "ip -n %s link set dev %s up", net_config[i].namespace,
@@ -155,7 +169,7 @@ static int create_network(void)
return -1;
}
-static void cleanup_network(void)
+static void cleanup_network(struct veth_configuration *net_config)
{
struct nstoken *nstoken;
int i;
@@ -196,6 +210,7 @@ void test_xdp_veth_redirect(void)
.remote_flags = 0,
}
};
+ struct veth_configuration net_config[VETH_PAIRS_COUNT];
struct bpf_object *bpf_objs[VETH_REDIRECT_SKEL_NB];
struct xdp_redirect_map *xdp_redirect_map;
struct xdp_dummy *xdp_dummy;
@@ -215,7 +230,7 @@ void test_xdp_veth_redirect(void)
if (!ASSERT_OK_PTR(xdp_redirect_map, "xdp_redirect_map__open_and_load"))
goto destroy_xdp_tx;
- if (!ASSERT_OK(create_network(), "create_network"))
+ if (!ASSERT_OK(create_network(net_config), "create network"))
goto destroy_xdp_redirect_map;
/* Then configure the redirect map and attach programs to interfaces */
@@ -237,7 +252,8 @@ void test_xdp_veth_redirect(void)
err = bpf_map_update_elem(map_fd, &i, &interface_id, BPF_ANY);
if (!ASSERT_OK(err, "configure interface redirection through map"))
goto destroy_xdp_redirect_map;
- if (attach_programs_to_veth_pair(bpf_objs, VETH_REDIRECT_SKEL_NB, ping_config, i))
+ if (attach_programs_to_veth_pair(bpf_objs, VETH_REDIRECT_SKEL_NB,
+ net_config, ping_config, i))
goto destroy_xdp_redirect_map;
}
@@ -254,5 +270,5 @@ void test_xdp_veth_redirect(void)
destroy_xdp_dummy:
xdp_dummy__destroy(xdp_dummy);
- cleanup_network();
+ cleanup_network(net_config);
}
--
2.47.1
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