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Date: Thu, 20 Apr 2023 09:44:04 -0700
From: Stanislav Fomichev <sdf@...gle.com>
To: Gilad Sever <gilad9366@...il.com>
Cc: dsahern@...nel.org, martin.lau@...ux.dev, daniel@...earbox.net,
john.fastabend@...il.com, ast@...nel.org, andrii@...nel.org,
song@...nel.org, yhs@...com, kpsingh@...nel.org, haoluo@...gle.com,
jolsa@...nel.org, davem@...emloft.net, edumazet@...gle.com,
kuba@...nel.org, pabeni@...hat.com, mykolal@...com,
shuah@...nel.org, hawk@...nel.org, joe@...d.net.nz,
eyal.birger@...il.com, shmulik.ladkani@...il.com,
bpf@...r.kernel.org, netdev@...r.kernel.org,
linux-kselftest@...r.kernel.org
Subject: Re: [PATCH bpf,v2 4/4] selftests/bpf: Add tc_socket_lookup tests
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@...il.com>
> ---
> 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?
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