diff options
author | Florent Revest <revest@chromium.org> | 2020-12-04 12:36:07 +0100 |
---|---|---|
committer | Daniel Borkmann <daniel@iogearbox.net> | 2020-12-04 22:32:40 +0100 |
commit | 593f6d41abbbc63e1ad297f7a36ab6060a812f0c (patch) | |
tree | 6981d03f07a50c74b5ee6deec1a57d35a92fe69e /tools/testing/selftests | |
parent | a50a85e40c59cf27ca3b324a5aa4c7f35314f251 (diff) | |
download | linux-593f6d41abbbc63e1ad297f7a36ab6060a812f0c.tar.bz2 |
selftests/bpf: Add an iterator selftest for bpf_sk_storage_delete
The eBPF program iterates over all entries (well, only one) of a socket
local storage map and deletes them all. The test makes sure that the
entry is indeed deleted.
Signed-off-by: Florent Revest <revest@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/20201204113609.1850150-4-revest@google.com
Diffstat (limited to 'tools/testing/selftests')
-rw-r--r-- | tools/testing/selftests/bpf/prog_tests/bpf_iter.c | 64 | ||||
-rw-r--r-- | tools/testing/selftests/bpf/progs/bpf_iter_bpf_sk_storage_helpers.c | 23 |
2 files changed, 87 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..bb4a638f2e6f 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 +914,67 @@ 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); +} + static void test_bpf_sk_storage_map(void) { DECLARE_LIBBPF_OPTS(bpf_iter_attach_opts, opts); @@ -1067,6 +1129,8 @@ 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("rdonly-buf-out-of-bound")) test_rdonly_buf_out_of_bound(); if (test__start_subtest("buf-neg-offset")) diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_bpf_sk_storage_helpers.c b/tools/testing/selftests/bpf/progs/bpf_iter_bpf_sk_storage_helpers.c new file mode 100644 index 000000000000..01ff3235e413 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/bpf_iter_bpf_sk_storage_helpers.c @@ -0,0 +1,23 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2020 Google LLC. */ +#include "bpf_iter.h" +#include <bpf/bpf_helpers.h> +#include <bpf/bpf_tracing.h> + +char _license[] SEC("license") = "GPL"; + +struct { + __uint(type, BPF_MAP_TYPE_SK_STORAGE); + __uint(map_flags, BPF_F_NO_PREALLOC); + __type(key, int); + __type(value, int); +} sk_stg_map SEC(".maps"); + +SEC("iter/bpf_sk_storage_map") +int delete_bpf_sk_storage_map(struct bpf_iter__bpf_sk_storage_map *ctx) +{ + if (ctx->sk) + bpf_sk_storage_delete(&sk_stg_map, ctx->sk); + + return 0; +} |