// SPDX-License-Identifier: GPL-2.0 // Copyright (c) 2020 Cloudflare #include #include "test_progs.h" #include "test_skmsg_load_helpers.skel.h" #include "test_sockmap_update.skel.h" #include "test_sockmap_invalid_update.skel.h" #include "bpf_iter_sockmap.skel.h" #define TCP_REPAIR 19 /* TCP sock is under repair right now */ #define TCP_REPAIR_ON 1 #define TCP_REPAIR_OFF_NO_WP -1 /* Turn off without window probes */ static int connected_socket_v4(void) { struct sockaddr_in addr = { .sin_family = AF_INET, .sin_port = htons(80), .sin_addr = { inet_addr("127.0.0.1") }, }; socklen_t len = sizeof(addr); int s, repair, err; s = socket(AF_INET, SOCK_STREAM, 0); if (CHECK_FAIL(s == -1)) goto error; repair = TCP_REPAIR_ON; err = setsockopt(s, SOL_TCP, TCP_REPAIR, &repair, sizeof(repair)); if (CHECK_FAIL(err)) goto error; err = connect(s, (struct sockaddr *)&addr, len); if (CHECK_FAIL(err)) goto error; repair = TCP_REPAIR_OFF_NO_WP; err = setsockopt(s, SOL_TCP, TCP_REPAIR, &repair, sizeof(repair)); if (CHECK_FAIL(err)) goto error; return s; error: perror(__func__); close(s); return -1; } static void compare_cookies(struct bpf_map *src, struct bpf_map *dst) { __u32 i, max_entries = bpf_map__max_entries(src); int err, duration = 0, src_fd, dst_fd; src_fd = bpf_map__fd(src); dst_fd = bpf_map__fd(dst); for (i = 0; i < max_entries; i++) { __u64 src_cookie, dst_cookie; err = bpf_map_lookup_elem(src_fd, &i, &src_cookie); if (err && errno == ENOENT) { err = bpf_map_lookup_elem(dst_fd, &i, &dst_cookie); CHECK(!err, "map_lookup_elem(dst)", "element %u not deleted\n", i); CHECK(err && errno != ENOENT, "map_lookup_elem(dst)", "%s\n", strerror(errno)); continue; } if (CHECK(err, "lookup_elem(src)", "%s\n", strerror(errno))) continue; err = bpf_map_lookup_elem(dst_fd, &i, &dst_cookie); if (CHECK(err, "lookup_elem(dst)", "%s\n", strerror(errno))) continue; CHECK(dst_cookie != src_cookie, "cookie mismatch", "%llu != %llu (pos %u)\n", dst_cookie, src_cookie, i); } } /* Create a map, populate it with one socket, and free the map. */ static void test_sockmap_create_update_free(enum bpf_map_type map_type) { const int zero = 0; int s, map, err; s = connected_socket_v4(); if (CHECK_FAIL(s == -1)) return; map = bpf_create_map(map_type, sizeof(int), sizeof(int), 1, 0); if (CHECK_FAIL(map == -1)) { perror("bpf_create_map"); goto out; } err = bpf_map_update_elem(map, &zero, &s, BPF_NOEXIST); if (CHECK_FAIL(err)) { perror("bpf_map_update"); goto out; } out: close(map); close(s); } static void test_skmsg_helpers(enum bpf_map_type map_type) { struct test_skmsg_load_helpers *skel; int err, map, verdict; skel = test_skmsg_load_helpers__open_and_load(); if (CHECK_FAIL(!skel)) { perror("test_skmsg_load_helpers__open_and_load"); return; } verdict = bpf_program__fd(skel->progs.prog_msg_verdict); map = bpf_map__fd(skel->maps.sock_map); err = bpf_prog_attach(verdict, map, BPF_SK_MSG_VERDICT, 0); if (CHECK_FAIL(err)) { perror("bpf_prog_attach"); goto out; } err = bpf_prog_detach2(verdict, map, BPF_SK_MSG_VERDICT); if (CHECK_FAIL(err)) { perror("bpf_prog_detach2"); goto out; } out: test_skmsg_load_helpers__destroy(skel); } static void test_sockmap_update(enum bpf_map_type map_type) { struct bpf_prog_test_run_attr tattr; int err, prog, src, duration = 0; struct test_sockmap_update *skel; struct bpf_map *dst_map; const __u32 zero = 0; char dummy[14] = {0}; __s64 sk; sk = connected_socket_v4(); if (CHECK(sk == -1, "connected_socket_v4", "cannot connect\n")) return; skel = test_sockmap_update__open_and_load(); if (CHECK(!skel, "open_and_load", "cannot load skeleton\n")) goto close_sk; prog = bpf_program__fd(skel->progs.copy_sock_map); src = bpf_map__fd(skel->maps.src); if (map_type == BPF_MAP_TYPE_SOCKMAP) dst_map = skel->maps.dst_sock_map; else dst_map = skel->maps.dst_sock_hash; err = bpf_map_update_elem(src, &zero, &sk, BPF_NOEXIST); if (CHECK(err, "update_elem(src)", "errno=%u\n", errno)) goto out; tattr = (struct bpf_prog_test_run_attr){ .prog_fd = prog, .repeat = 1, .data_in = dummy, .data_size_in = sizeof(dummy), }; err = bpf_prog_test_run_xattr(&tattr); if (CHECK_ATTR(err || !tattr.retval, "bpf_prog_test_run", "errno=%u retval=%u\n", errno, tattr.retval)) goto out; compare_cookies(skel->maps.src, dst_map); out: test_sockmap_update__destroy(skel); close_sk: close(sk); } static void test_sockmap_invalid_update(void) { struct test_sockmap_invalid_update *skel; int duration = 0; skel = test_sockmap_invalid_update__open_and_load(); if (CHECK(skel, "open_and_load", "verifier accepted map_update\n")) test_sockmap_invalid_update__destroy(skel); } static void test_sockmap_copy(enum bpf_map_type map_type) { DECLARE_LIBBPF_OPTS(bpf_iter_attach_opts, opts); int err, len, src_fd, iter_fd, duration = 0; union bpf_iter_link_info linfo = {}; __u32 i, num_sockets, num_elems; struct bpf_iter_sockmap *skel; __s64 *sock_fd = NULL; struct bpf_link *link; struct bpf_map *src; char buf[64]; skel = bpf_iter_sockmap__open_and_load(); if (CHECK(!skel, "bpf_iter_sockmap__open_and_load", "skeleton open_and_load failed\n")) return; if (map_type == BPF_MAP_TYPE_SOCKMAP) { src = skel->maps.sockmap; num_elems = bpf_map__max_entries(src); num_sockets = num_elems - 1; } else { src = skel->maps.sockhash; num_elems = bpf_map__max_entries(src) - 1; num_sockets = num_elems; } sock_fd = calloc(num_sockets, sizeof(*sock_fd)); if (CHECK(!sock_fd, "calloc(sock_fd)", "failed to allocate\n")) goto out; for (i = 0; i < num_sockets; i++) sock_fd[i] = -1; src_fd = bpf_map__fd(src); for (i = 0; i < num_sockets; i++) { sock_fd[i] = connected_socket_v4(); if (CHECK(sock_fd[i] == -1, "connected_socket_v4", "cannot connect\n")) goto out; err = bpf_map_update_elem(src_fd, &i, &sock_fd[i], BPF_NOEXIST); if (CHECK(err, "map_update", "failed: %s\n", strerror(errno))) goto out; } linfo.map.map_fd = src_fd; opts.link_info = &linfo; opts.link_info_len = sizeof(linfo); link = bpf_program__attach_iter(skel->progs.copy, &opts); if (CHECK(IS_ERR(link), "attach_iter", "attach_iter failed\n")) goto out; iter_fd = bpf_iter_create(bpf_link__fd(link)); if (CHECK(iter_fd < 0, "create_iter", "create_iter failed\n")) goto free_link; /* do some tests */ while ((len = read(iter_fd, buf, sizeof(buf))) > 0) ; if (CHECK(len < 0, "read", "failed: %s\n", strerror(errno))) goto close_iter; /* test results */ if (CHECK(skel->bss->elems != num_elems, "elems", "got %u expected %u\n", skel->bss->elems, num_elems)) goto close_iter; if (CHECK(skel->bss->socks != num_sockets, "socks", "got %u expected %u\n", skel->bss->socks, num_sockets)) goto close_iter; compare_cookies(src, skel->maps.dst); close_iter: close(iter_fd); free_link: bpf_link__destroy(link); out: for (i = 0; sock_fd && i < num_sockets; i++) if (sock_fd[i] >= 0) close(sock_fd[i]); if (sock_fd) free(sock_fd); bpf_iter_sockmap__destroy(skel); } void test_sockmap_basic(void) { if (test__start_subtest("sockmap create_update_free")) test_sockmap_create_update_free(BPF_MAP_TYPE_SOCKMAP); if (test__start_subtest("sockhash create_update_free")) test_sockmap_create_update_free(BPF_MAP_TYPE_SOCKHASH); if (test__start_subtest("sockmap sk_msg load helpers")) test_skmsg_helpers(BPF_MAP_TYPE_SOCKMAP); if (test__start_subtest("sockhash sk_msg load helpers")) test_skmsg_helpers(BPF_MAP_TYPE_SOCKHASH); if (test__start_subtest("sockmap update")) test_sockmap_update(BPF_MAP_TYPE_SOCKMAP); if (test__start_subtest("sockhash update")) test_sockmap_update(BPF_MAP_TYPE_SOCKHASH); if (test__start_subtest("sockmap update in unsafe context")) test_sockmap_invalid_update(); if (test__start_subtest("sockmap copy")) test_sockmap_copy(BPF_MAP_TYPE_SOCKMAP); if (test__start_subtest("sockhash copy")) test_sockmap_copy(BPF_MAP_TYPE_SOCKHASH); }