diff options
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/bpf_iter.c')
| -rw-r--r-- | tools/testing/selftests/bpf/prog_tests/bpf_iter.c | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_iter.c b/tools/testing/selftests/bpf/prog_tests/bpf_iter.c index 448885b95eed..0e586368948d 100644 --- a/tools/testing/selftests/bpf/prog_tests/bpf_iter.c +++ b/tools/testing/selftests/bpf/prog_tests/bpf_iter.c @@ -20,6 +20,7 @@ #include "bpf_iter_bpf_percpu_hash_map.skel.h" #include "bpf_iter_bpf_array_map.skel.h" #include "bpf_iter_bpf_percpu_array_map.skel.h" +#include "bpf_iter_bpf_sk_storage_helpers.skel.h" #include "bpf_iter_bpf_sk_storage_map.skel.h" #include "bpf_iter_test_kern5.skel.h" #include "bpf_iter_test_kern6.skel.h" @@ -913,6 +914,119 @@ out: bpf_iter_bpf_percpu_array_map__destroy(skel); } +/* An iterator program deletes all local storage in a map. */ +static void test_bpf_sk_storage_delete(void) +{ + DECLARE_LIBBPF_OPTS(bpf_iter_attach_opts, opts); + struct bpf_iter_bpf_sk_storage_helpers *skel; + union bpf_iter_link_info linfo; + int err, len, map_fd, iter_fd; + struct bpf_link *link; + int sock_fd = -1; + __u32 val = 42; + char buf[64]; + + skel = bpf_iter_bpf_sk_storage_helpers__open_and_load(); + if (CHECK(!skel, "bpf_iter_bpf_sk_storage_helpers__open_and_load", + "skeleton open_and_load failed\n")) + return; + + map_fd = bpf_map__fd(skel->maps.sk_stg_map); + + sock_fd = socket(AF_INET6, SOCK_STREAM, 0); + if (CHECK(sock_fd < 0, "socket", "errno: %d\n", errno)) + goto out; + err = bpf_map_update_elem(map_fd, &sock_fd, &val, BPF_NOEXIST); + if (CHECK(err, "map_update", "map_update failed\n")) + goto out; + + memset(&linfo, 0, sizeof(linfo)); + linfo.map.map_fd = map_fd; + opts.link_info = &linfo; + opts.link_info_len = sizeof(linfo); + link = bpf_program__attach_iter(skel->progs.delete_bpf_sk_storage_map, + &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", "read failed: %s\n", strerror(errno))) + goto close_iter; + + /* test results */ + err = bpf_map_lookup_elem(map_fd, &sock_fd, &val); + if (CHECK(!err || errno != ENOENT, "bpf_map_lookup_elem", + "map value wasn't deleted (err=%d, errno=%d)\n", err, errno)) + goto close_iter; + +close_iter: + close(iter_fd); +free_link: + bpf_link__destroy(link); +out: + if (sock_fd >= 0) + close(sock_fd); + bpf_iter_bpf_sk_storage_helpers__destroy(skel); +} + +/* This creates a socket and its local storage. It then runs a task_iter BPF + * program that replaces the existing socket local storage with the tgid of the + * only task owning a file descriptor to this socket, this process, prog_tests. + * It then runs a tcp socket iterator that negates the value in the existing + * socket local storage, the test verifies that the resulting value is -pid. + */ +static void test_bpf_sk_storage_get(void) +{ + struct bpf_iter_bpf_sk_storage_helpers *skel; + int err, map_fd, val = -1; + int sock_fd = -1; + + skel = bpf_iter_bpf_sk_storage_helpers__open_and_load(); + if (CHECK(!skel, "bpf_iter_bpf_sk_storage_helpers__open_and_load", + "skeleton open_and_load failed\n")) + return; + + sock_fd = socket(AF_INET6, SOCK_STREAM, 0); + if (CHECK(sock_fd < 0, "socket", "errno: %d\n", errno)) + goto out; + + err = listen(sock_fd, 1); + if (CHECK(err != 0, "listen", "errno: %d\n", errno)) + goto close_socket; + + map_fd = bpf_map__fd(skel->maps.sk_stg_map); + + err = bpf_map_update_elem(map_fd, &sock_fd, &val, BPF_NOEXIST); + if (CHECK(err, "bpf_map_update_elem", "map_update_failed\n")) + goto close_socket; + + do_dummy_read(skel->progs.fill_socket_owner); + + err = bpf_map_lookup_elem(map_fd, &sock_fd, &val); + if (CHECK(err || val != getpid(), "bpf_map_lookup_elem", + "map value wasn't set correctly (expected %d, got %d, err=%d)\n", + getpid(), val, err)) + goto close_socket; + + do_dummy_read(skel->progs.negate_socket_local_storage); + + err = bpf_map_lookup_elem(map_fd, &sock_fd, &val); + CHECK(err || val != -getpid(), "bpf_map_lookup_elem", + "map value wasn't set correctly (expected %d, got %d, err=%d)\n", + -getpid(), val, err); + +close_socket: + close(sock_fd); +out: + bpf_iter_bpf_sk_storage_helpers__destroy(skel); +} + static void test_bpf_sk_storage_map(void) { DECLARE_LIBBPF_OPTS(bpf_iter_attach_opts, opts); @@ -1067,6 +1181,10 @@ void test_bpf_iter(void) test_bpf_percpu_array_map(); if (test__start_subtest("bpf_sk_storage_map")) test_bpf_sk_storage_map(); + if (test__start_subtest("bpf_sk_storage_delete")) + test_bpf_sk_storage_delete(); + if (test__start_subtest("bpf_sk_storage_get")) + test_bpf_sk_storage_get(); if (test__start_subtest("rdonly-buf-out-of-bound")) test_rdonly_buf_out_of_bound(); if (test__start_subtest("buf-neg-offset")) |