selftests/bpf: Add attach test for bpf_program__attach_kprobe_multi_opts
Adding tests for bpf_program__attach_kprobe_multi_opts function, that test attach with pattern, symbols and addrs. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20220316122419.933957-13-jolsa@kernel.org
This commit is contained in:
Jiri Olsa
Alexei Starovoitov
Родитель
2c6401c966
Коммит
9271a0c7ae
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@ -3,7 +3,7 @@
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#include "kprobe_multi.skel.h"
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#include "trace_helpers.h"
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static void kprobe_multi_test_run(struct kprobe_multi *skel)
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static void kprobe_multi_test_run(struct kprobe_multi *skel, bool test_return)
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{
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LIBBPF_OPTS(bpf_test_run_opts, topts);
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int err, prog_fd;
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@ -22,14 +22,16 @@ static void kprobe_multi_test_run(struct kprobe_multi *skel)
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ASSERT_EQ(skel->bss->kprobe_test7_result, 1, "kprobe_test7_result");
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ASSERT_EQ(skel->bss->kprobe_test8_result, 1, "kprobe_test8_result");
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ASSERT_EQ(skel->bss->kretprobe_test1_result, 1, "kretprobe_test1_result");
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ASSERT_EQ(skel->bss->kretprobe_test2_result, 1, "kretprobe_test2_result");
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ASSERT_EQ(skel->bss->kretprobe_test3_result, 1, "kretprobe_test3_result");
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ASSERT_EQ(skel->bss->kretprobe_test4_result, 1, "kretprobe_test4_result");
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ASSERT_EQ(skel->bss->kretprobe_test5_result, 1, "kretprobe_test5_result");
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ASSERT_EQ(skel->bss->kretprobe_test6_result, 1, "kretprobe_test6_result");
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ASSERT_EQ(skel->bss->kretprobe_test7_result, 1, "kretprobe_test7_result");
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ASSERT_EQ(skel->bss->kretprobe_test8_result, 1, "kretprobe_test8_result");
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if (test_return) {
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ASSERT_EQ(skel->bss->kretprobe_test1_result, 1, "kretprobe_test1_result");
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ASSERT_EQ(skel->bss->kretprobe_test2_result, 1, "kretprobe_test2_result");
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ASSERT_EQ(skel->bss->kretprobe_test3_result, 1, "kretprobe_test3_result");
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ASSERT_EQ(skel->bss->kretprobe_test4_result, 1, "kretprobe_test4_result");
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ASSERT_EQ(skel->bss->kretprobe_test5_result, 1, "kretprobe_test5_result");
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ASSERT_EQ(skel->bss->kretprobe_test6_result, 1, "kretprobe_test6_result");
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ASSERT_EQ(skel->bss->kretprobe_test7_result, 1, "kretprobe_test7_result");
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ASSERT_EQ(skel->bss->kretprobe_test8_result, 1, "kretprobe_test8_result");
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}
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}
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static void test_skel_api(void)
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@ -46,7 +48,7 @@ static void test_skel_api(void)
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if (!ASSERT_OK(err, "kprobe_multi__attach"))
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goto cleanup;
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kprobe_multi_test_run(skel);
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kprobe_multi_test_run(skel, true);
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cleanup:
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kprobe_multi__destroy(skel);
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@ -73,7 +75,7 @@ static void test_link_api(struct bpf_link_create_opts *opts)
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if (!ASSERT_GE(link2_fd, 0, "link_fd"))
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goto cleanup;
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kprobe_multi_test_run(skel);
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kprobe_multi_test_run(skel, true);
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cleanup:
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if (link1_fd != -1)
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@ -127,6 +129,178 @@ static void test_link_api_syms(void)
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test_link_api(&opts);
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}
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static void
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test_attach_api(const char *pattern, struct bpf_kprobe_multi_opts *opts)
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{
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struct bpf_link *link1 = NULL, *link2 = NULL;
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struct kprobe_multi *skel = NULL;
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skel = kprobe_multi__open_and_load();
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if (!ASSERT_OK_PTR(skel, "fentry_raw_skel_load"))
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goto cleanup;
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skel->bss->pid = getpid();
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link1 = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kprobe,
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pattern, opts);
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if (!ASSERT_OK_PTR(link1, "bpf_program__attach_kprobe_multi_opts"))
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goto cleanup;
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if (opts) {
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opts->retprobe = true;
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link2 = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kretprobe,
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pattern, opts);
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if (!ASSERT_OK_PTR(link2, "bpf_program__attach_kprobe_multi_opts"))
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goto cleanup;
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}
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kprobe_multi_test_run(skel, !!opts);
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cleanup:
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bpf_link__destroy(link2);
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bpf_link__destroy(link1);
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kprobe_multi__destroy(skel);
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}
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static void test_attach_api_pattern(void)
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{
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LIBBPF_OPTS(bpf_kprobe_multi_opts, opts);
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test_attach_api("bpf_fentry_test*", &opts);
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test_attach_api("bpf_fentry_test?", NULL);
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}
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static void test_attach_api_addrs(void)
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{
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LIBBPF_OPTS(bpf_kprobe_multi_opts, opts);
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unsigned long long addrs[8];
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GET_ADDR("bpf_fentry_test1", addrs[0]);
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GET_ADDR("bpf_fentry_test2", addrs[1]);
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GET_ADDR("bpf_fentry_test3", addrs[2]);
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GET_ADDR("bpf_fentry_test4", addrs[3]);
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GET_ADDR("bpf_fentry_test5", addrs[4]);
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GET_ADDR("bpf_fentry_test6", addrs[5]);
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GET_ADDR("bpf_fentry_test7", addrs[6]);
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GET_ADDR("bpf_fentry_test8", addrs[7]);
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opts.addrs = (const unsigned long *) addrs;
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opts.cnt = ARRAY_SIZE(addrs);
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test_attach_api(NULL, &opts);
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}
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static void test_attach_api_syms(void)
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{
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LIBBPF_OPTS(bpf_kprobe_multi_opts, opts);
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const char *syms[8] = {
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"bpf_fentry_test1",
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"bpf_fentry_test2",
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"bpf_fentry_test3",
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"bpf_fentry_test4",
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"bpf_fentry_test5",
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"bpf_fentry_test6",
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"bpf_fentry_test7",
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"bpf_fentry_test8",
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};
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opts.syms = syms;
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opts.cnt = ARRAY_SIZE(syms);
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test_attach_api(NULL, &opts);
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}
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static void test_attach_api_fails(void)
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{
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LIBBPF_OPTS(bpf_kprobe_multi_opts, opts);
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struct kprobe_multi *skel = NULL;
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struct bpf_link *link = NULL;
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unsigned long long addrs[2];
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const char *syms[2] = {
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"bpf_fentry_test1",
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"bpf_fentry_test2",
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};
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__u64 cookies[2];
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addrs[0] = ksym_get_addr("bpf_fentry_test1");
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addrs[1] = ksym_get_addr("bpf_fentry_test2");
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if (!ASSERT_FALSE(!addrs[0] || !addrs[1], "ksym_get_addr"))
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goto cleanup;
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skel = kprobe_multi__open_and_load();
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if (!ASSERT_OK_PTR(skel, "fentry_raw_skel_load"))
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goto cleanup;
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skel->bss->pid = getpid();
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/* fail_1 - pattern and opts NULL */
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link = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kprobe,
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NULL, NULL);
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if (!ASSERT_ERR_PTR(link, "fail_1"))
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goto cleanup;
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if (!ASSERT_EQ(libbpf_get_error(link), -EINVAL, "fail_1_error"))
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goto cleanup;
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/* fail_2 - both addrs and syms set */
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opts.addrs = (const unsigned long *) addrs;
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opts.syms = syms;
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opts.cnt = ARRAY_SIZE(syms);
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opts.cookies = NULL;
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link = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kprobe,
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NULL, &opts);
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if (!ASSERT_ERR_PTR(link, "fail_2"))
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goto cleanup;
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if (!ASSERT_EQ(libbpf_get_error(link), -EINVAL, "fail_2_error"))
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goto cleanup;
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/* fail_3 - pattern and addrs set */
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opts.addrs = (const unsigned long *) addrs;
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opts.syms = NULL;
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opts.cnt = ARRAY_SIZE(syms);
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opts.cookies = NULL;
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link = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kprobe,
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"ksys_*", &opts);
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if (!ASSERT_ERR_PTR(link, "fail_3"))
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goto cleanup;
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if (!ASSERT_EQ(libbpf_get_error(link), -EINVAL, "fail_3_error"))
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goto cleanup;
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/* fail_4 - pattern and cnt set */
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opts.addrs = NULL;
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opts.syms = NULL;
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opts.cnt = ARRAY_SIZE(syms);
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opts.cookies = NULL;
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link = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kprobe,
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"ksys_*", &opts);
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if (!ASSERT_ERR_PTR(link, "fail_4"))
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goto cleanup;
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if (!ASSERT_EQ(libbpf_get_error(link), -EINVAL, "fail_4_error"))
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goto cleanup;
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/* fail_5 - pattern and cookies */
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opts.addrs = NULL;
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opts.syms = NULL;
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opts.cnt = 0;
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opts.cookies = cookies;
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link = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kprobe,
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"ksys_*", &opts);
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if (!ASSERT_ERR_PTR(link, "fail_5"))
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goto cleanup;
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if (!ASSERT_EQ(libbpf_get_error(link), -EINVAL, "fail_5_error"))
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goto cleanup;
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cleanup:
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bpf_link__destroy(link);
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kprobe_multi__destroy(skel);
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}
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void test_kprobe_multi_test(void)
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{
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if (!ASSERT_OK(load_kallsyms(), "load_kallsyms"))
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@ -138,4 +312,12 @@ void test_kprobe_multi_test(void)
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test_link_api_syms();
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if (test__start_subtest("link_api_syms"))
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test_link_api_addrs();
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if (test__start_subtest("attach_api_pattern"))
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test_attach_api_pattern();
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if (test__start_subtest("attach_api_addrs"))
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test_attach_api_addrs();
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if (test__start_subtest("attach_api_syms"))
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test_attach_api_syms();
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if (test__start_subtest("attach_api_fails"))
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test_attach_api_fails();
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}
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