// SPDX-License-Identifier: GPL-2.0 // Copyright (c) 2020 Cloudflare #include #include #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 "test_sockmap_skb_verdict_attach.skel.h" #include "test_sockmap_progs_query.skel.h" #include "test_sockmap_pass_prog.skel.h" #include "test_sockmap_drop_prog.skel.h" #include "bpf_iter_sockmap.skel.h" #include "sockmap_helpers.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 (!ASSERT_GE(s, 0, "socket")) goto error; repair = TCP_REPAIR_ON; err = setsockopt(s, SOL_TCP, TCP_REPAIR, &repair, sizeof(repair)); if (!ASSERT_OK(err, "setsockopt(TCP_REPAIR)")) goto error; err = connect(s, (struct sockaddr *)&addr, len); if (!ASSERT_OK(err, "connect")) goto error; repair = TCP_REPAIR_OFF_NO_WP; err = setsockopt(s, SOL_TCP, TCP_REPAIR, &repair, sizeof(repair)); if (!ASSERT_OK(err, "setsockopt(TCP_REPAIR)")) 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, 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); ASSERT_ERR(err, "map_lookup_elem(dst)"); ASSERT_EQ(errno, ENOENT, "map_lookup_elem(dst)"); continue; } if (!ASSERT_OK(err, "lookup_elem(src)")) continue; err = bpf_map_lookup_elem(dst_fd, &i, &dst_cookie); if (!ASSERT_OK(err, "lookup_elem(dst)")) continue; ASSERT_EQ(dst_cookie, src_cookie, "cookie mismatch"); } } /* 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 (!ASSERT_GE(s, 0, "connected_socket_v4")) return; map = bpf_map_create(map_type, NULL, sizeof(int), sizeof(int), 1, NULL); if (!ASSERT_GE(map, 0, "bpf_map_create")) goto out; err = bpf_map_update_elem(map, &zero, &s, BPF_NOEXIST); if (!ASSERT_OK(err, "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 (!ASSERT_OK_PTR(skel, "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 (!ASSERT_OK(err, "bpf_prog_attach")) goto out; err = bpf_prog_detach2(verdict, map, BPF_SK_MSG_VERDICT); if (!ASSERT_OK(err, "bpf_prog_detach2")) goto out; out: test_skmsg_load_helpers__destroy(skel); } static void test_sockmap_update(enum bpf_map_type map_type) { int err, prog, src; struct test_sockmap_update *skel; struct bpf_map *dst_map; const __u32 zero = 0; char dummy[14] = {0}; LIBBPF_OPTS(bpf_test_run_opts, topts, .data_in = dummy, .data_size_in = sizeof(dummy), .repeat = 1, ); __s64 sk; sk = connected_socket_v4(); if (!ASSERT_NEQ(sk, -1, "connected_socket_v4")) return; skel = test_sockmap_update__open_and_load(); if (!ASSERT_OK_PTR(skel, "open_and_load")) 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 (!ASSERT_OK(err, "update_elem(src)")) goto out; err = bpf_prog_test_run_opts(prog, &topts); if (!ASSERT_OK(err, "test_run")) goto out; if (!ASSERT_NEQ(topts.retval, 0, "test_run 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; skel = test_sockmap_invalid_update__open_and_load(); if (!ASSERT_NULL(skel, "open_and_load")) 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; 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 (!ASSERT_OK_PTR(skel, "bpf_iter_sockmap__open_and_load")) 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 (!ASSERT_OK_PTR(sock_fd, "calloc(sock_fd)")) 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 (!ASSERT_NEQ(sock_fd[i], -1, "connected_socket_v4")) goto out; err = bpf_map_update_elem(src_fd, &i, &sock_fd[i], BPF_NOEXIST); if (!ASSERT_OK(err, "map_update")) 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 (!ASSERT_OK_PTR(link, "attach_iter")) goto out; iter_fd = bpf_iter_create(bpf_link__fd(link)); if (!ASSERT_GE(iter_fd, 0, "create_iter")) goto free_link; /* do some tests */ while ((len = read(iter_fd, buf, sizeof(buf))) > 0) ; if (!ASSERT_GE(len, 0, "read")) goto close_iter; /* test results */ if (!ASSERT_EQ(skel->bss->elems, num_elems, "elems")) goto close_iter; if (!ASSERT_EQ(skel->bss->socks, num_sockets, "socks")) 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); } static void test_sockmap_skb_verdict_attach(enum bpf_attach_type first, enum bpf_attach_type second) { struct test_sockmap_skb_verdict_attach *skel; int err, map, verdict; skel = test_sockmap_skb_verdict_attach__open_and_load(); if (!ASSERT_OK_PTR(skel, "open_and_load")) return; verdict = bpf_program__fd(skel->progs.prog_skb_verdict); map = bpf_map__fd(skel->maps.sock_map); err = bpf_prog_attach(verdict, map, first, 0); if (!ASSERT_OK(err, "bpf_prog_attach")) goto out; err = bpf_prog_attach(verdict, map, second, 0); ASSERT_EQ(err, -EBUSY, "prog_attach_fail"); err = bpf_prog_detach2(verdict, map, first); if (!ASSERT_OK(err, "bpf_prog_detach2")) goto out; out: test_sockmap_skb_verdict_attach__destroy(skel); } static __u32 query_prog_id(int prog_fd) { struct bpf_prog_info info = {}; __u32 info_len = sizeof(info); int err; err = bpf_prog_get_info_by_fd(prog_fd, &info, &info_len); if (!ASSERT_OK(err, "bpf_prog_get_info_by_fd") || !ASSERT_EQ(info_len, sizeof(info), "bpf_prog_get_info_by_fd")) return 0; return info.id; } static void test_sockmap_progs_query(enum bpf_attach_type attach_type) { struct test_sockmap_progs_query *skel; int err, map_fd, verdict_fd; __u32 attach_flags = 0; __u32 prog_ids[3] = {}; __u32 prog_cnt = 3; skel = test_sockmap_progs_query__open_and_load(); if (!ASSERT_OK_PTR(skel, "test_sockmap_progs_query__open_and_load")) return; map_fd = bpf_map__fd(skel->maps.sock_map); if (attach_type == BPF_SK_MSG_VERDICT) verdict_fd = bpf_program__fd(skel->progs.prog_skmsg_verdict); else verdict_fd = bpf_program__fd(skel->progs.prog_skb_verdict); err = bpf_prog_query(map_fd, attach_type, 0 /* query flags */, &attach_flags, prog_ids, &prog_cnt); ASSERT_OK(err, "bpf_prog_query failed"); ASSERT_EQ(attach_flags, 0, "wrong attach_flags on query"); ASSERT_EQ(prog_cnt, 0, "wrong program count on query"); err = bpf_prog_attach(verdict_fd, map_fd, attach_type, 0); if (!ASSERT_OK(err, "bpf_prog_attach failed")) goto out; prog_cnt = 1; err = bpf_prog_query(map_fd, attach_type, 0 /* query flags */, &attach_flags, prog_ids, &prog_cnt); ASSERT_OK(err, "bpf_prog_query failed"); ASSERT_EQ(attach_flags, 0, "wrong attach_flags on query"); ASSERT_EQ(prog_cnt, 1, "wrong program count on query"); ASSERT_EQ(prog_ids[0], query_prog_id(verdict_fd), "wrong prog_ids on query"); bpf_prog_detach2(verdict_fd, map_fd, attach_type); out: test_sockmap_progs_query__destroy(skel); } #define MAX_EVENTS 10 static void test_sockmap_skb_verdict_shutdown(void) { struct epoll_event ev, events[MAX_EVENTS]; int n, err, map, verdict, s, c1, p1; struct test_sockmap_pass_prog *skel; int epollfd; int zero = 0; char b; skel = test_sockmap_pass_prog__open_and_load(); if (!ASSERT_OK_PTR(skel, "open_and_load")) return; verdict = bpf_program__fd(skel->progs.prog_skb_verdict); map = bpf_map__fd(skel->maps.sock_map_rx); err = bpf_prog_attach(verdict, map, BPF_SK_SKB_STREAM_VERDICT, 0); if (!ASSERT_OK(err, "bpf_prog_attach")) goto out; s = socket_loopback(AF_INET, SOCK_STREAM); if (s < 0) goto out; err = create_pair(s, AF_INET, SOCK_STREAM, &c1, &p1); if (err < 0) goto out; err = bpf_map_update_elem(map, &zero, &c1, BPF_NOEXIST); if (err < 0) goto out_close; shutdown(p1, SHUT_WR); ev.events = EPOLLIN; ev.data.fd = c1; epollfd = epoll_create1(0); if (!ASSERT_GT(epollfd, -1, "epoll_create(0)")) goto out_close; err = epoll_ctl(epollfd, EPOLL_CTL_ADD, c1, &ev); if (!ASSERT_OK(err, "epoll_ctl(EPOLL_CTL_ADD)")) goto out_close; err = epoll_wait(epollfd, events, MAX_EVENTS, -1); if (!ASSERT_EQ(err, 1, "epoll_wait(fd)")) goto out_close; n = recv(c1, &b, 1, SOCK_NONBLOCK); ASSERT_EQ(n, 0, "recv_timeout(fin)"); out_close: close(c1); close(p1); out: test_sockmap_pass_prog__destroy(skel); } static void test_sockmap_skb_verdict_fionread(bool pass_prog) { int expected, zero = 0, sent, recvd, avail; int err, map, verdict, s, c0, c1, p0, p1; struct test_sockmap_pass_prog *pass; struct test_sockmap_drop_prog *drop; char buf[256] = "0123456789"; if (pass_prog) { pass = test_sockmap_pass_prog__open_and_load(); if (!ASSERT_OK_PTR(pass, "open_and_load")) return; verdict = bpf_program__fd(pass->progs.prog_skb_verdict); map = bpf_map__fd(pass->maps.sock_map_rx); expected = sizeof(buf); } else { drop = test_sockmap_drop_prog__open_and_load(); if (!ASSERT_OK_PTR(drop, "open_and_load")) return; verdict = bpf_program__fd(drop->progs.prog_skb_verdict); map = bpf_map__fd(drop->maps.sock_map_rx); /* On drop data is consumed immediately and copied_seq inc'd */ expected = 0; } err = bpf_prog_attach(verdict, map, BPF_SK_SKB_STREAM_VERDICT, 0); if (!ASSERT_OK(err, "bpf_prog_attach")) goto out; s = socket_loopback(AF_INET, SOCK_STREAM); if (!ASSERT_GT(s, -1, "socket_loopback(s)")) goto out; err = create_socket_pairs(s, AF_INET, SOCK_STREAM, &c0, &c1, &p0, &p1); if (!ASSERT_OK(err, "create_socket_pairs(s)")) goto out; err = bpf_map_update_elem(map, &zero, &c1, BPF_NOEXIST); if (!ASSERT_OK(err, "bpf_map_update_elem(c1)")) goto out_close; sent = xsend(p1, &buf, sizeof(buf), 0); ASSERT_EQ(sent, sizeof(buf), "xsend(p0)"); err = ioctl(c1, FIONREAD, &avail); ASSERT_OK(err, "ioctl(FIONREAD) error"); ASSERT_EQ(avail, expected, "ioctl(FIONREAD)"); /* On DROP test there will be no data to read */ if (pass_prog) { recvd = recv_timeout(c1, &buf, sizeof(buf), SOCK_NONBLOCK, IO_TIMEOUT_SEC); ASSERT_EQ(recvd, sizeof(buf), "recv_timeout(c0)"); } out_close: close(c0); close(p0); close(c1); close(p1); out: if (pass_prog) test_sockmap_pass_prog__destroy(pass); else test_sockmap_drop_prog__destroy(drop); } 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); if (test__start_subtest("sockmap skb_verdict attach")) { test_sockmap_skb_verdict_attach(BPF_SK_SKB_VERDICT, BPF_SK_SKB_STREAM_VERDICT); test_sockmap_skb_verdict_attach(BPF_SK_SKB_STREAM_VERDICT, BPF_SK_SKB_VERDICT); } if (test__start_subtest("sockmap msg_verdict progs query")) test_sockmap_progs_query(BPF_SK_MSG_VERDICT); if (test__start_subtest("sockmap stream_parser progs query")) test_sockmap_progs_query(BPF_SK_SKB_STREAM_PARSER); if (test__start_subtest("sockmap stream_verdict progs query")) test_sockmap_progs_query(BPF_SK_SKB_STREAM_VERDICT); if (test__start_subtest("sockmap skb_verdict progs query")) test_sockmap_progs_query(BPF_SK_SKB_VERDICT); if (test__start_subtest("sockmap skb_verdict shutdown")) test_sockmap_skb_verdict_shutdown(); if (test__start_subtest("sockmap skb_verdict fionread")) test_sockmap_skb_verdict_fionread(true); if (test__start_subtest("sockmap skb_verdict fionread on drop")) test_sockmap_skb_verdict_fionread(false); }