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selftests/bpf: test_xdp_veth: Use int to describe next veth

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In the struct veth_configuration, the next_veth string is used to tell
the next virtual interface to which packets must be redirected to. So it
has to match the local_veth string of an other veth_configuration.

Change next_veth type to int to avoid handling two identical strings.
This integer is used as an offset in the network configuration table.

Signed-off-by: Bastien Curutchet (eBPF Foundation) <bastien.curutchet@bootlin.com>
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Link: https://patch.msgid.link/20250131-redirect-multi-v4-4-970b33678512@bootlin.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Bastien Curutchet (eBPF Foundation) 2025-01-31 08:21:43 +01:00 committed by Alexei Starovoitov
parent 0f5bab8dff
commit 71e0b1cc72
1 changed files with 7 additions and 5 deletions
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12
tools/testing/selftests/bpf/prog_tests/test_xdp_veth.c
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@ -39,7 +39,7 @@ 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 next_veth[VETH_NAME_MAX_LEN]; /* Local interface to redirect traffic to */
int next_veth; /* Local interface to redirect traffic to */
char *remote_addr; /* IP address of the remote veth */
};
@ -47,21 +47,21 @@ static struct veth_configuration config[VETH_PAIRS_COUNT] = {
{
.local_veth = "veth1",
.remote_veth = "veth11",
.next_veth = "veth2",
.next_veth = 1,
.remote_addr = IP_SRC,
.namespace = "ns-veth11"
},
{
.local_veth = "veth2",
.remote_veth = "veth22",
.next_veth = "veth3",
.next_veth = 2,
.remote_addr = NULL,
.namespace = "ns-veth22"
},
{
.local_veth = "veth3",
.remote_veth = "veth33",
.next_veth = "veth1",
.next_veth = 0,
.remote_addr = IP_DST,
.namespace = "ns-veth33"
}
@ -144,7 +144,9 @@ static int configure_network(struct skeletons *skeletons)
if (!ASSERT_GE(map_fd, 0, "open redirect map"))
goto fail;
for (i = 0; i < VETH_PAIRS_COUNT; i++) {
interface_id = if_nametoindex(config[i].next_veth);
int next_veth = config[i].next_veth;
interface_id = if_nametoindex(config[next_veth].local_veth);
if (!ASSERT_NEQ(interface_id, 0, "non zero interface index"))
goto fail;
err = bpf_map_update_elem(map_fd, &i, &interface_id, BPF_ANY);