diff options
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/sockmap_basic.c')
-rw-r--r-- | tools/testing/selftests/bpf/prog_tests/sockmap_basic.c | 569 |
1 files changed, 569 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/sockmap_basic.c b/tools/testing/selftests/bpf/prog_tests/sockmap_basic.c new file mode 100644 index 0000000000..dda7060e86 --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/sockmap_basic.c @@ -0,0 +1,569 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2020 Cloudflare +#include <error.h> +#include <netinet/tcp.h> +#include <sys/epoll.h> + +#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); +} + +static void test_sockmap_skb_verdict_peek(void) +{ + int err, map, verdict, s, c1, p1, zero = 0, sent, recvd, avail; + struct test_sockmap_pass_prog *pass; + char snd[256] = "0123456789"; + char rcv[256] = "0"; + + 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); + + 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_pair(s, AF_INET, SOCK_STREAM, &c1, &p1); + if (!ASSERT_OK(err, "create_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, snd, sizeof(snd), 0); + ASSERT_EQ(sent, sizeof(snd), "xsend(p1)"); + recvd = recv(c1, rcv, sizeof(rcv), MSG_PEEK); + ASSERT_EQ(recvd, sizeof(rcv), "recv(c1)"); + err = ioctl(c1, FIONREAD, &avail); + ASSERT_OK(err, "ioctl(FIONREAD) error"); + ASSERT_EQ(avail, sizeof(snd), "after peek ioctl(FIONREAD)"); + recvd = recv(c1, rcv, sizeof(rcv), 0); + ASSERT_EQ(recvd, sizeof(rcv), "recv(p0)"); + err = ioctl(c1, FIONREAD, &avail); + ASSERT_OK(err, "ioctl(FIONREAD) error"); + ASSERT_EQ(avail, 0, "after read ioctl(FIONREAD)"); + +out_close: + close(c1); + close(p1); +out: + test_sockmap_pass_prog__destroy(pass); +} + +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); + if (test__start_subtest("sockmap skb_verdict msg_f_peek")) + test_sockmap_skb_verdict_peek(); +} |