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

   1// SPDX-License-Identifier: GPL-2.0
   2/* Copyright (c) 2021 Facebook */
   3#include <test_progs.h>
   4#include <netinet/tcp.h>
   5#include "sockopt_qos_to_cc.skel.h"
   6
   7static void run_setsockopt_test(int cg_fd, int sock_fd)
   8{
   9        socklen_t optlen;
  10        char cc[16]; /* TCP_CA_NAME_MAX */
  11        int buf;
  12        int err = -1;
  13
  14        buf = 0x2D;
  15        err = setsockopt(sock_fd, SOL_IPV6, IPV6_TCLASS, &buf, sizeof(buf));
  16        if (!ASSERT_OK(err, "setsockopt(sock_fd, IPV6_TCLASS)"))
  17                return;
  18
  19        /* Verify the setsockopt cc change */
  20        optlen = sizeof(cc);
  21        err = getsockopt(sock_fd, SOL_TCP, TCP_CONGESTION, cc, &optlen);
  22        if (!ASSERT_OK(err, "getsockopt(sock_fd, TCP_CONGESTION)"))
  23                return;
  24
  25        if (!ASSERT_STREQ(cc, "reno", "getsockopt(sock_fd, TCP_CONGESTION)"))
  26                return;
  27}
  28
  29void test_sockopt_qos_to_cc(void)
  30{
  31        struct sockopt_qos_to_cc *skel;
  32        char cc_cubic[16] = "cubic"; /* TCP_CA_NAME_MAX */
  33        int cg_fd = -1;
  34        int sock_fd = -1;
  35        int err;
  36
  37        cg_fd = test__join_cgroup("/sockopt_qos_to_cc");
  38        if (!ASSERT_GE(cg_fd, 0, "cg-join(sockopt_qos_to_cc)"))
  39                return;
  40
  41        skel = sockopt_qos_to_cc__open_and_load();
  42        if (!ASSERT_OK_PTR(skel, "skel"))
  43                goto done;
  44
  45        sock_fd = socket(AF_INET6, SOCK_STREAM, 0);
  46        if (!ASSERT_GE(sock_fd, 0, "v6 socket open"))
  47                goto done;
  48
  49        err = setsockopt(sock_fd, SOL_TCP, TCP_CONGESTION, &cc_cubic,
  50                         sizeof(cc_cubic));
  51        if (!ASSERT_OK(err, "setsockopt(sock_fd, TCP_CONGESTION)"))
  52                goto done;
  53
  54        skel->links.sockopt_qos_to_cc =
  55                bpf_program__attach_cgroup(skel->progs.sockopt_qos_to_cc,
  56                                           cg_fd);
  57        if (!ASSERT_OK_PTR(skel->links.sockopt_qos_to_cc,
  58                           "prog_attach(sockopt_qos_to_cc)"))
  59                goto done;
  60
  61        run_setsockopt_test(cg_fd, sock_fd);
  62
  63done:
  64        if (sock_fd != -1)
  65                close(sock_fd);
  66        if (cg_fd != -1)
  67                close(cg_fd);
  68        /* destroy can take null and error pointer */
  69        sockopt_qos_to_cc__destroy(skel);
  70}
  71