Re: [PATCH bpf,v2 4/4] selftests/bpf: Add tc_socket_lookup tests

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 




On 20/04/2023 19:44, Stanislav Fomichev wrote:
On 04/20, Gilad Sever wrote:
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;
+}
Any reason you're not using start_server from network_helpers.h?
It's because I need to bind the server socket to the VRF device.



[Index of Archives]     [Linux Samsung SoC]     [Linux Rockchip SoC]     [Linux Actions SoC]     [Linux for Synopsys ARC Processors]     [Linux NFS]     [Linux NILFS]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]


  Powered by Linux