Verify that socket lookup via TC with all BPF APIs is VRF aware.
Signed-off-by: Gilad Sever <gilad9366@xxxxxxxxx>
---
v2: Fix build by initializing vars with -1
---
.../bpf/prog_tests/tc_socket_lookup.c | 341 ++++++++++++++++++
.../selftests/bpf/progs/tc_socket_lookup.c | 73 ++++
2 files changed, 414 insertions(+)
create mode 100644 tools/testing/selftests/bpf/prog_tests/tc_socket_lookup.c
create mode 100644 tools/testing/selftests/bpf/progs/tc_socket_lookup.c
diff --git a/tools/testing/selftests/bpf/prog_tests/tc_socket_lookup.c b/tools/testing/selftests/bpf/prog_tests/tc_socket_lookup.c
new file mode 100644
index 000000000000..5dcaf0ea3f8c
--- /dev/null
+++ b/tools/testing/selftests/bpf/prog_tests/tc_socket_lookup.c
@@ -0,0 +1,341 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+
+/*
+ * Topology:
+ * ---------
+ * NS1 namespace | NS2 namespace
+ * |
+ * +--------------+ | +--------------+
+ * | veth01 |----------| veth10 |
+ * | 172.16.1.100 | | | 172.16.1.200 |
+ * | bpf | | +--------------+
+ * +--------------+ |
+ * server(UDP/TCP) |
+ * +-------------------+ |
+ * | vrf1 | |
+ * | +--------------+ | | +--------------+
+ * | | veth02 |----------| veth20 |
+ * | | 172.16.2.100 | | | | 172.16.2.200 |
+ * | | bpf | | | +--------------+
+ * | +--------------+ | |
+ * | server(UDP/TCP) | |
+ * +-------------------+ |
+ *
+ * Test flow
+ * -----------
+ * The tests verifies that socket lookup via TC is VRF aware:
+ * 1) Creates two veth pairs between NS1 and NS2:
+ * a) veth01 <-> veth10 outside the VRF
+ * b) veth02 <-> veth20 in the VRF
+ * 2) Attaches to veth01 and veth02 a program that calls:
+ * a) bpf_skc_lookup_tcp() with TCP and tcp_skc is true
+ * b) bpf_sk_lookup_tcp() with TCP and tcp_skc is false
+ * c) bpf_sk_lookup_udp() with UDP
+ * The program stores the lookup result in bss->lookup_status.
+ * 3) Creates a socket TCP/UDP server in/outside the VRF.
+ * 4) The test expects lookup_status to be:
+ * a) 0 from device in VRF to server outside VRF
+ * b) 0 from device outside VRF to server in VRF
+ * c) 1 from device in VRF to server in VRF
+ * d) 1 from device outside VRF to server outside VRF
+ */
+
+#include <net/if.h>
+
+#include "test_progs.h"
+#include "network_helpers.h"
+#include "tc_socket_lookup.skel.h"
+
+#define NS1 "tc_socket_lookup_1"
+#define NS2 "tc_socket_lookup_2"
+
+#define IP4_ADDR_VETH01 "172.16.1.100"
+#define IP4_ADDR_VETH10 "172.16.1.200"
+#define IP4_ADDR_VETH02 "172.16.2.100"
+#define IP4_ADDR_VETH20 "172.16.2.200"
+
+#define NON_VRF_PORT 5000
+#define IN_VRF_PORT 5001
+
+#define IO_TIMEOUT_SEC 3
+
+#define SYS(fmt, ...) \
+ ({ \
+ char cmd[1024]; \
+ snprintf(cmd, sizeof(cmd), fmt, ##__VA_ARGS__); \
+ if (!ASSERT_OK(system(cmd), cmd)) \
+ goto fail; \
+ })
+
+#define SYS_NOFAIL(fmt, ...) \
+ ({ \
+ char cmd[1024]; \
+ snprintf(cmd, sizeof(cmd), fmt, ##__VA_ARGS__); \
+ system(cmd); \
+ })
+static int make_socket(int sotype, const char *ip, int port,
+ struct sockaddr_storage *addr)
+{
+ struct timeval timeo = { .tv_sec = IO_TIMEOUT_SEC };
+ int err, fd;
+
+ err = make_sockaddr(AF_INET, ip, port, addr, NULL);
+ if (!ASSERT_OK(err, "make_address"))
+ return -1;
+
+ fd = socket(AF_INET, sotype, 0);
+ if (!ASSERT_OK(fd < 0, "socket"))
+ return -1;
+
+ err = setsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, &timeo, sizeof(timeo));
+ if (!ASSERT_OK(err, "setsockopt(SO_SNDTIMEO)"))
+ goto fail;
+
+ err = setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, &timeo, sizeof(timeo));
+ if (!ASSERT_OK(err, "setsockopt(SO_RCVTIMEO)"))
+ goto fail;
+
+ return fd;
+fail:
+ close(fd);
+ return -1;
+}
+
+static int make_server(int sotype, const char *ip, int port, const char *ifname)
+{
+ struct sockaddr_storage addr = {};
+ const int one = 1;
+ int err, fd = -1;
+
+ fd = make_socket(sotype, ip, port, &addr);
+ if (fd < 0)
+ return -1;
+
+ if (sotype == SOCK_STREAM) {
+ err = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one,
+ sizeof(one));
+ if (!ASSERT_OK(err, "setsockopt(SO_REUSEADDR)"))
+ goto fail;
+ }
+
+ if (ifname) {
+ err = setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE,
+ ifname, strlen(ifname) + 1);
+ if (!ASSERT_OK(err, "setsockopt(SO_BINDTODEVICE)"))
+ goto fail;
+ }
+
+ err = bind(fd, (void *)&addr, sizeof(struct sockaddr_in));
+ if (!ASSERT_OK(err, "bind"))
+ goto fail;
+
+ if (sotype == SOCK_STREAM) {
+ err = listen(fd, SOMAXCONN);
+ if (!ASSERT_OK(err, "listen"))
+ goto fail;
+ }
+
+ return fd;
+fail:
+ close(fd);
+ return -1;
+}
