175 lines
3.6 KiB
C
175 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2020, Tessares SA. */
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/* Copyright (c) 2022, SUSE. */
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#include <test_progs.h>
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#include "cgroup_helpers.h"
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#include "network_helpers.h"
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#include "mptcp_sock.skel.h"
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#ifndef TCP_CA_NAME_MAX
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#define TCP_CA_NAME_MAX 16
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#endif
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struct mptcp_storage {
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__u32 invoked;
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__u32 is_mptcp;
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struct sock *sk;
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__u32 token;
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struct sock *first;
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char ca_name[TCP_CA_NAME_MAX];
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};
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static int verify_tsk(int map_fd, int client_fd)
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{
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int err, cfd = client_fd;
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struct mptcp_storage val;
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err = bpf_map_lookup_elem(map_fd, &cfd, &val);
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if (!ASSERT_OK(err, "bpf_map_lookup_elem"))
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return err;
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if (!ASSERT_EQ(val.invoked, 1, "unexpected invoked count"))
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err++;
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if (!ASSERT_EQ(val.is_mptcp, 0, "unexpected is_mptcp"))
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err++;
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return err;
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}
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static void get_msk_ca_name(char ca_name[])
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{
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size_t len;
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int fd;
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fd = open("/proc/sys/net/ipv4/tcp_congestion_control", O_RDONLY);
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if (!ASSERT_GE(fd, 0, "failed to open tcp_congestion_control"))
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return;
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len = read(fd, ca_name, TCP_CA_NAME_MAX);
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if (!ASSERT_GT(len, 0, "failed to read ca_name"))
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goto err;
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if (len > 0 && ca_name[len - 1] == '\n')
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ca_name[len - 1] = '\0';
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err:
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close(fd);
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}
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static int verify_msk(int map_fd, int client_fd, __u32 token)
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{
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char ca_name[TCP_CA_NAME_MAX];
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int err, cfd = client_fd;
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struct mptcp_storage val;
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if (!ASSERT_GT(token, 0, "invalid token"))
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return -1;
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get_msk_ca_name(ca_name);
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err = bpf_map_lookup_elem(map_fd, &cfd, &val);
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if (!ASSERT_OK(err, "bpf_map_lookup_elem"))
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return err;
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if (!ASSERT_EQ(val.invoked, 1, "unexpected invoked count"))
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err++;
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if (!ASSERT_EQ(val.is_mptcp, 1, "unexpected is_mptcp"))
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err++;
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if (!ASSERT_EQ(val.token, token, "unexpected token"))
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err++;
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if (!ASSERT_EQ(val.first, val.sk, "unexpected first"))
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err++;
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if (!ASSERT_STRNEQ(val.ca_name, ca_name, TCP_CA_NAME_MAX, "unexpected ca_name"))
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err++;
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return err;
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}
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static int run_test(int cgroup_fd, int server_fd, bool is_mptcp)
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{
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int client_fd, prog_fd, map_fd, err;
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struct mptcp_sock *sock_skel;
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sock_skel = mptcp_sock__open_and_load();
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if (!ASSERT_OK_PTR(sock_skel, "skel_open_load"))
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return -EIO;
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err = mptcp_sock__attach(sock_skel);
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if (!ASSERT_OK(err, "skel_attach"))
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goto out;
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prog_fd = bpf_program__fd(sock_skel->progs._sockops);
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if (!ASSERT_GE(prog_fd, 0, "bpf_program__fd")) {
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err = -EIO;
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goto out;
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}
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map_fd = bpf_map__fd(sock_skel->maps.socket_storage_map);
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if (!ASSERT_GE(map_fd, 0, "bpf_map__fd")) {
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err = -EIO;
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goto out;
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}
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err = bpf_prog_attach(prog_fd, cgroup_fd, BPF_CGROUP_SOCK_OPS, 0);
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if (!ASSERT_OK(err, "bpf_prog_attach"))
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goto out;
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client_fd = connect_to_fd(server_fd, 0);
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if (!ASSERT_GE(client_fd, 0, "connect to fd")) {
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err = -EIO;
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goto out;
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}
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err += is_mptcp ? verify_msk(map_fd, client_fd, sock_skel->bss->token) :
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verify_tsk(map_fd, client_fd);
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close(client_fd);
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out:
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mptcp_sock__destroy(sock_skel);
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return err;
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}
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static void test_base(void)
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{
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int server_fd, cgroup_fd;
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cgroup_fd = test__join_cgroup("/mptcp");
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if (!ASSERT_GE(cgroup_fd, 0, "test__join_cgroup"))
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return;
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/* without MPTCP */
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server_fd = start_server(AF_INET, SOCK_STREAM, NULL, 0, 0);
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if (!ASSERT_GE(server_fd, 0, "start_server"))
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goto with_mptcp;
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ASSERT_OK(run_test(cgroup_fd, server_fd, false), "run_test tcp");
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close(server_fd);
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with_mptcp:
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/* with MPTCP */
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server_fd = start_mptcp_server(AF_INET, NULL, 0, 0);
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if (!ASSERT_GE(server_fd, 0, "start_mptcp_server"))
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goto close_cgroup_fd;
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ASSERT_OK(run_test(cgroup_fd, server_fd, true), "run_test mptcp");
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close(server_fd);
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close_cgroup_fd:
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close(cgroup_fd);
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}
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void test_mptcp(void)
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{
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if (test__start_subtest("base"))
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test_base();
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}
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