// SPDX-License-Identifier: GPL-2.0
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// Copyright (c) 2020 Facebook
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#include <test_progs.h>
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#include "network_helpers.h"
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#include "cgroup_skb_sk_lookup_kern.skel.h"
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static void run_lookup_test(__u16 *g_serv_port, int out_sk)
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{
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int serv_sk = -1, in_sk = -1, serv_in_sk = -1, err;
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struct sockaddr_in6 addr = {};
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socklen_t addr_len = sizeof(addr);
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__u32 duration = 0;
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serv_sk = start_server(AF_INET6, SOCK_STREAM, NULL, 0, 0);
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if (CHECK(serv_sk < 0, "start_server", "failed to start server\n"))
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return;
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err = getsockname(serv_sk, (struct sockaddr *)&addr, &addr_len);
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if (CHECK(err, "getsockname", "errno %d\n", errno))
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goto cleanup;
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*g_serv_port = addr.sin6_port;
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/* Client outside of test cgroup should fail to connect by timeout. */
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err = connect_fd_to_fd(out_sk, serv_sk, 1000);
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if (CHECK(!err || errno != EINPROGRESS, "connect_fd_to_fd",
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"unexpected result err %d errno %d\n", err, errno))
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goto cleanup;
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/* Client inside test cgroup should connect just fine. */
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in_sk = connect_to_fd(serv_sk, 0);
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if (CHECK(in_sk < 0, "connect_to_fd", "errno %d\n", errno))
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goto cleanup;
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serv_in_sk = accept(serv_sk, NULL, NULL);
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if (CHECK(serv_in_sk < 0, "accept", "errno %d\n", errno))
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goto cleanup;
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cleanup:
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close(serv_in_sk);
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close(in_sk);
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close(serv_sk);
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}
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static void run_cgroup_bpf_test(const char *cg_path, int out_sk)
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{
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struct cgroup_skb_sk_lookup_kern *skel;
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struct bpf_link *link;
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__u32 duration = 0;
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int cgfd = -1;
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skel = cgroup_skb_sk_lookup_kern__open_and_load();
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if (CHECK(!skel, "skel_open_load", "open_load failed\n"))
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return;
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cgfd = test__join_cgroup(cg_path);
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if (CHECK(cgfd < 0, "cgroup_join", "cgroup setup failed\n"))
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goto cleanup;
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link = bpf_program__attach_cgroup(skel->progs.ingress_lookup, cgfd);
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if (CHECK(IS_ERR(link), "cgroup_attach", "err: %ld\n", PTR_ERR(link)))
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goto cleanup;
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run_lookup_test(&skel->bss->g_serv_port, out_sk);
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bpf_link__destroy(link);
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cleanup:
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close(cgfd);
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cgroup_skb_sk_lookup_kern__destroy(skel);
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}
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void test_cgroup_skb_sk_lookup(void)
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{
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const char *cg_path = "/foo";
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int out_sk;
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/* Create a socket before joining testing cgroup so that its cgroup id
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* differs from that of testing cgroup. Moving selftests process to
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* testing cgroup won't change cgroup id of an already created socket.
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*/
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out_sk = socket(AF_INET6, SOCK_STREAM, 0);
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if (CHECK_FAIL(out_sk < 0))
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return;
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run_cgroup_bpf_test(cg_path, out_sk);
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close(out_sk);
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}
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