92 lines · c
1// SPDX-License-Identifier: GPL-2.02// Copyright (c) 2020 Facebook3 4#include <test_progs.h>5 6#include "network_helpers.h"7#include "cgroup_skb_sk_lookup_kern.skel.h"8 9static void run_lookup_test(__u16 *g_serv_port, int out_sk)10{11 int serv_sk = -1, in_sk = -1, serv_in_sk = -1, err;12 struct sockaddr_in6 addr = {};13 socklen_t addr_len = sizeof(addr);14 __u32 duration = 0;15 16 serv_sk = start_server(AF_INET6, SOCK_STREAM, NULL, 0, 0);17 if (CHECK(serv_sk < 0, "start_server", "failed to start server\n"))18 return;19 20 err = getsockname(serv_sk, (struct sockaddr *)&addr, &addr_len);21 if (CHECK(err, "getsockname", "errno %d\n", errno))22 goto cleanup;23 24 *g_serv_port = addr.sin6_port;25 26 /* Client outside of test cgroup should fail to connect by timeout. */27 err = connect_fd_to_fd(out_sk, serv_sk, 1000);28 if (CHECK(!err || errno != EINPROGRESS, "connect_fd_to_fd",29 "unexpected result err %d errno %d\n", err, errno))30 goto cleanup;31 32 /* Client inside test cgroup should connect just fine. */33 in_sk = connect_to_fd(serv_sk, 0);34 if (CHECK(in_sk < 0, "connect_to_fd", "errno %d\n", errno))35 goto cleanup;36 37 serv_in_sk = accept(serv_sk, NULL, NULL);38 if (CHECK(serv_in_sk < 0, "accept", "errno %d\n", errno))39 goto cleanup;40 41cleanup:42 close(serv_in_sk);43 close(in_sk);44 close(serv_sk);45}46 47static void run_cgroup_bpf_test(const char *cg_path, int out_sk)48{49 struct cgroup_skb_sk_lookup_kern *skel;50 struct bpf_link *link;51 __u32 duration = 0;52 int cgfd = -1;53 54 skel = cgroup_skb_sk_lookup_kern__open_and_load();55 if (CHECK(!skel, "skel_open_load", "open_load failed\n"))56 return;57 58 cgfd = test__join_cgroup(cg_path);59 if (CHECK(cgfd < 0, "cgroup_join", "cgroup setup failed\n"))60 goto cleanup;61 62 link = bpf_program__attach_cgroup(skel->progs.ingress_lookup, cgfd);63 if (!ASSERT_OK_PTR(link, "cgroup_attach"))64 goto cleanup;65 66 run_lookup_test(&skel->bss->g_serv_port, out_sk);67 68 bpf_link__destroy(link);69 70cleanup:71 close(cgfd);72 cgroup_skb_sk_lookup_kern__destroy(skel);73}74 75void test_cgroup_skb_sk_lookup(void)76{77 const char *cg_path = "/foo";78 int out_sk;79 80 /* Create a socket before joining testing cgroup so that its cgroup id81 * differs from that of testing cgroup. Moving selftests process to82 * testing cgroup won't change cgroup id of an already created socket.83 */84 out_sk = socket(AF_INET6, SOCK_STREAM, 0);85 if (CHECK_FAIL(out_sk < 0))86 return;87 88 run_cgroup_bpf_test(cg_path, out_sk);89 90 close(out_sk);91}92