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author | 2021-07-04 12:02:51 -0700 | |
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committer | 2021-07-15 18:17:50 -0700 | |
commit | 5ea905dd432205bfa314efb1b5353889e1804f11 (patch) | |
tree | 6cf35f4aeec0ed23c6972d618763e10f8c148954 /tools/testing/selftests/bpf/prog_tests/sockmap_listen.c | |
parent | selftests/bpf: Factor out add_to_sockmap() (diff) | |
download | linux-5ea905dd432205bfa314efb1b5353889e1804f11.tar.gz linux-5ea905dd432205bfa314efb1b5353889e1804f11.tar.bz2 linux-5ea905dd432205bfa314efb1b5353889e1804f11.zip |
selftests/bpf: Add a test case for unix sockmap
Add a test case to ensure redirection between two AF_UNIX
datagram sockets work.
Signed-off-by: Cong Wang <cong.wang@bytedance.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20210704190252.11866-11-xiyou.wangcong@gmail.com
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/sockmap_listen.c')
-rw-r--r-- | tools/testing/selftests/bpf/prog_tests/sockmap_listen.c | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/sockmap_listen.c b/tools/testing/selftests/bpf/prog_tests/sockmap_listen.c index a023a824af78..b6464be89f1a 100644 --- a/tools/testing/selftests/bpf/prog_tests/sockmap_listen.c +++ b/tools/testing/selftests/bpf/prog_tests/sockmap_listen.c @@ -1435,6 +1435,8 @@ static const char *family_str(sa_family_t family) return "IPv4"; case AF_INET6: return "IPv6"; + case AF_UNIX: + return "Unix"; default: return "unknown"; } @@ -1557,6 +1559,99 @@ static void test_redir(struct test_sockmap_listen *skel, struct bpf_map *map, } } +static void unix_redir_to_connected(int sotype, int sock_mapfd, + int verd_mapfd, enum redir_mode mode) +{ + const char *log_prefix = redir_mode_str(mode); + int c0, c1, p0, p1; + unsigned int pass; + int retries = 100; + int err, n; + int sfd[2]; + u32 key; + char b; + + zero_verdict_count(verd_mapfd); + + if (socketpair(AF_UNIX, sotype | SOCK_NONBLOCK, 0, sfd)) + return; + c0 = sfd[0], p0 = sfd[1]; + + if (socketpair(AF_UNIX, sotype | SOCK_NONBLOCK, 0, sfd)) + goto close0; + c1 = sfd[0], p1 = sfd[1]; + + err = add_to_sockmap(sock_mapfd, p0, p1); + if (err) + goto close; + + n = write(c1, "a", 1); + if (n < 0) + FAIL_ERRNO("%s: write", log_prefix); + if (n == 0) + FAIL("%s: incomplete write", log_prefix); + if (n < 1) + goto close; + + key = SK_PASS; + err = xbpf_map_lookup_elem(verd_mapfd, &key, &pass); + if (err) + goto close; + if (pass != 1) + FAIL("%s: want pass count 1, have %d", log_prefix, pass); + +again: + n = read(mode == REDIR_INGRESS ? p0 : c0, &b, 1); + if (n < 0) { + if (errno == EAGAIN && retries--) + goto again; + FAIL_ERRNO("%s: read", log_prefix); + } + if (n == 0) + FAIL("%s: incomplete read", log_prefix); + +close: + xclose(c1); + xclose(p1); +close0: + xclose(c0); + xclose(p0); +} + +static void unix_skb_redir_to_connected(struct test_sockmap_listen *skel, + struct bpf_map *inner_map, int sotype) +{ + int verdict = bpf_program__fd(skel->progs.prog_skb_verdict); + int verdict_map = bpf_map__fd(skel->maps.verdict_map); + int sock_map = bpf_map__fd(inner_map); + int err; + + err = xbpf_prog_attach(verdict, sock_map, BPF_SK_SKB_VERDICT, 0); + if (err) + return; + + skel->bss->test_ingress = false; + unix_redir_to_connected(sotype, sock_map, verdict_map, REDIR_EGRESS); + skel->bss->test_ingress = true; + unix_redir_to_connected(sotype, sock_map, verdict_map, REDIR_INGRESS); + + xbpf_prog_detach2(verdict, sock_map, BPF_SK_SKB_VERDICT); +} + +static void test_unix_redir(struct test_sockmap_listen *skel, struct bpf_map *map, + int sotype) +{ + const char *family_name, *map_name; + char s[MAX_TEST_NAME]; + + family_name = family_str(AF_UNIX); + map_name = map_type_str(map); + snprintf(s, sizeof(s), "%s %s %s", map_name, family_name, __func__); + if (!test__start_subtest(s)) + return; + unix_skb_redir_to_connected(skel, map, sotype); +} + static void test_reuseport(struct test_sockmap_listen *skel, struct bpf_map *map, int family, int sotype) { @@ -1754,10 +1849,12 @@ void test_sockmap_listen(void) skel->bss->test_sockmap = true; run_tests(skel, skel->maps.sock_map, AF_INET); run_tests(skel, skel->maps.sock_map, AF_INET6); + test_unix_redir(skel, skel->maps.sock_map, SOCK_DGRAM); skel->bss->test_sockmap = false; run_tests(skel, skel->maps.sock_hash, AF_INET); run_tests(skel, skel->maps.sock_hash, AF_INET6); + test_unix_redir(skel, skel->maps.sock_hash, SOCK_DGRAM); test_sockmap_listen__destroy(skel); } |