LXR linux/tools/testing/selftests/bpf/prog_tests/tcpbpf

   1// SPDX-License-Identifier: GPL-2.0
   2#include <test_progs.h>
   3#include <network_helpers.h>
   4
   5#include "test_tcpbpf.h"
   6#include "test_tcpbpf_kern.skel.h"
   7
   8#define LO_ADDR6 "::1"
   9#define CG_NAME "/tcpbpf-user-test"
  10
  11static __u32 duration;
  12
  13static void verify_result(struct tcpbpf_globals *result)
  14{
  15        __u32 expected_events = ((1 << BPF_SOCK_OPS_TIMEOUT_INIT) |
  16                                 (1 << BPF_SOCK_OPS_RWND_INIT) |
  17                                 (1 << BPF_SOCK_OPS_TCP_CONNECT_CB) |
  18                                 (1 << BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB) |
  19                                 (1 << BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB) |
  20                                 (1 << BPF_SOCK_OPS_NEEDS_ECN) |
  21                                 (1 << BPF_SOCK_OPS_STATE_CB) |
  22                                 (1 << BPF_SOCK_OPS_TCP_LISTEN_CB));
  23
  24        /* check global map */
  25        CHECK(expected_events != result->event_map, "event_map",
  26              "unexpected event_map: actual 0x%08x != expected 0x%08x\n",
  27              result->event_map, expected_events);
  28
  29        ASSERT_EQ(result->bytes_received, 501, "bytes_received");
  30        ASSERT_EQ(result->bytes_acked, 1002, "bytes_acked");
  31        ASSERT_EQ(result->data_segs_in, 1, "data_segs_in");
  32        ASSERT_EQ(result->data_segs_out, 1, "data_segs_out");
  33        ASSERT_EQ(result->bad_cb_test_rv, 0x80, "bad_cb_test_rv");
  34        ASSERT_EQ(result->good_cb_test_rv, 0, "good_cb_test_rv");
  35        ASSERT_EQ(result->num_listen, 1, "num_listen");
  36
  37        /* 3 comes from one listening socket + both ends of the connection */
  38        ASSERT_EQ(result->num_close_events, 3, "num_close_events");
  39
  40        /* check setsockopt for SAVE_SYN */
  41        ASSERT_EQ(result->tcp_save_syn, 0, "tcp_save_syn");
  42
  43        /* check getsockopt for SAVED_SYN */
  44        ASSERT_EQ(result->tcp_saved_syn, 1, "tcp_saved_syn");
  45
  46        /* check getsockopt for window_clamp */
  47        ASSERT_EQ(result->window_clamp_client, 9216, "window_clamp_client");
  48        ASSERT_EQ(result->window_clamp_server, 9216, "window_clamp_server");
  49}
  50
  51static void run_test(struct tcpbpf_globals *result)
  52{
  53        int listen_fd = -1, cli_fd = -1, accept_fd = -1;
  54        char buf[1000];
  55        int err = -1;
  56        int i, rv;
  57
  58        listen_fd = start_server(AF_INET6, SOCK_STREAM, LO_ADDR6, 0, 0);
  59        if (CHECK(listen_fd == -1, "start_server", "listen_fd:%d errno:%d\n",
  60                  listen_fd, errno))
  61                goto done;
  62
  63        cli_fd = connect_to_fd(listen_fd, 0);
  64        if (CHECK(cli_fd == -1, "connect_to_fd(listen_fd)",
  65                  "cli_fd:%d errno:%d\n", cli_fd, errno))
  66                goto done;
  67
  68        accept_fd = accept(listen_fd, NULL, NULL);
  69        if (CHECK(accept_fd == -1, "accept(listen_fd)",
  70                  "accept_fd:%d errno:%d\n", accept_fd, errno))
  71                goto done;
  72
  73        /* Send 1000B of '+'s from cli_fd -> accept_fd */
  74        for (i = 0; i < 1000; i++)
  75                buf[i] = '+';
  76
  77        rv = send(cli_fd, buf, 1000, 0);
  78        if (CHECK(rv != 1000, "send(cli_fd)", "rv:%d errno:%d\n", rv, errno))
  79                goto done;
  80
  81        rv = recv(accept_fd, buf, 1000, 0);
  82        if (CHECK(rv != 1000, "recv(accept_fd)", "rv:%d errno:%d\n", rv, errno))
  83                goto done;
  84
  85        /* Send 500B of '.'s from accept_fd ->cli_fd */
  86        for (i = 0; i < 500; i++)
  87                buf[i] = '.';
  88
  89        rv = send(accept_fd, buf, 500, 0);
  90        if (CHECK(rv != 500, "send(accept_fd)", "rv:%d errno:%d\n", rv, errno))
  91                goto done;
  92
  93        rv = recv(cli_fd, buf, 500, 0);
  94        if (CHECK(rv != 500, "recv(cli_fd)", "rv:%d errno:%d\n", rv, errno))
  95                goto done;
  96
  97        /*
  98         * shutdown accept first to guarantee correct ordering for
  99         * bytes_received and bytes_acked when we go to verify the results.
 100         */
 101        shutdown(accept_fd, SHUT_WR);
 102        err = recv(cli_fd, buf, 1, 0);
 103        if (CHECK(err, "recv(cli_fd) for fin", "err:%d errno:%d\n", err, errno))
 104                goto done;
 105
 106        shutdown(cli_fd, SHUT_WR);
 107        err = recv(accept_fd, buf, 1, 0);
 108        CHECK(err, "recv(accept_fd) for fin", "err:%d errno:%d\n", err, errno);
 109done:
 110        if (accept_fd != -1)
 111                close(accept_fd);
 112        if (cli_fd != -1)
 113                close(cli_fd);
 114        if (listen_fd != -1)
 115                close(listen_fd);
 116
 117        if (!err)
 118                verify_result(result);
 119}
 120
 121void test_tcpbpf_user(void)
 122{
 123        struct test_tcpbpf_kern *skel;
 124        int cg_fd = -1;
 125
 126        skel = test_tcpbpf_kern__open_and_load();
 127        if (CHECK(!skel, "open and load skel", "failed"))
 128                return;
 129
 130        cg_fd = test__join_cgroup(CG_NAME);
 131        if (CHECK(cg_fd < 0, "test__join_cgroup(" CG_NAME ")",
 132                  "cg_fd:%d errno:%d", cg_fd, errno))
 133                goto err;
 134
 135        skel->links.bpf_testcb = bpf_program__attach_cgroup(skel->progs.bpf_testcb, cg_fd);
 136        if (!ASSERT_OK_PTR(skel->links.bpf_testcb, "attach_cgroup(bpf_testcb)"))
 137                goto err;
 138
 139        run_test(&skel->bss->global);
 140
 141err:
 142        if (cg_fd != -1)
 143                close(cg_fd);
 144        test_tcpbpf_kern__destroy(skel);
 145}
 146