610 lines
17 KiB
C
610 lines
17 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <test_progs.h>
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#include "kprobe_multi.skel.h"
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#include "trace_helpers.h"
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#include "kprobe_multi_empty.skel.h"
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#include "kprobe_multi_override.skel.h"
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#include "kprobe_multi_session.skel.h"
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#include "kprobe_multi_session_cookie.skel.h"
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#include "kprobe_multi_verifier.skel.h"
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#include "kprobe_write_ctx.skel.h"
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#include "bpf/libbpf_internal.h"
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#include "bpf/hashmap.h"
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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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prog_fd = bpf_program__fd(skel->progs.trigger);
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err = bpf_prog_test_run_opts(prog_fd, &topts);
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ASSERT_OK(err, "test_run");
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ASSERT_EQ(topts.retval, 0, "test_run");
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ASSERT_EQ(skel->bss->kprobe_test1_result, 1, "kprobe_test1_result");
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ASSERT_EQ(skel->bss->kprobe_test2_result, 1, "kprobe_test2_result");
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ASSERT_EQ(skel->bss->kprobe_test3_result, 1, "kprobe_test3_result");
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ASSERT_EQ(skel->bss->kprobe_test4_result, 1, "kprobe_test4_result");
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ASSERT_EQ(skel->bss->kprobe_test5_result, 1, "kprobe_test5_result");
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ASSERT_EQ(skel->bss->kprobe_test6_result, 1, "kprobe_test6_result");
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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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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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{
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struct kprobe_multi *skel = NULL;
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int err;
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skel = kprobe_multi__open_and_load();
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if (!ASSERT_OK_PTR(skel, "kprobe_multi__open_and_load"))
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goto cleanup;
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skel->bss->pid = getpid();
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err = kprobe_multi__attach(skel);
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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, true);
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cleanup:
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kprobe_multi__destroy(skel);
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}
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static void test_link_api(struct bpf_link_create_opts *opts)
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{
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int prog_fd, link1_fd = -1, link2_fd = -1;
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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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prog_fd = bpf_program__fd(skel->progs.test_kprobe);
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link1_fd = bpf_link_create(prog_fd, 0, BPF_TRACE_KPROBE_MULTI, opts);
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if (!ASSERT_GE(link1_fd, 0, "link_fd"))
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goto cleanup;
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opts->kprobe_multi.flags = BPF_F_KPROBE_MULTI_RETURN;
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prog_fd = bpf_program__fd(skel->progs.test_kretprobe);
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link2_fd = bpf_link_create(prog_fd, 0, BPF_TRACE_KPROBE_MULTI, 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, true);
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cleanup:
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if (link1_fd != -1)
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close(link1_fd);
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if (link2_fd != -1)
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close(link2_fd);
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kprobe_multi__destroy(skel);
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}
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#define GET_ADDR(__sym, __addr) ({ \
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__addr = ksym_get_addr(__sym); \
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if (!ASSERT_NEQ(__addr, 0, "kallsyms load failed for " #__sym)) \
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return; \
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})
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static void test_link_api_addrs(void)
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{
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LIBBPF_OPTS(bpf_link_create_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.kprobe_multi.addrs = (const unsigned long*) addrs;
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opts.kprobe_multi.cnt = ARRAY_SIZE(addrs);
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test_link_api(&opts);
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}
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static void test_link_api_syms(void)
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{
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LIBBPF_OPTS(bpf_link_create_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.kprobe_multi.syms = syms;
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opts.kprobe_multi.cnt = ARRAY_SIZE(syms);
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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_manual,
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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_manual,
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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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int saved_error;
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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_manual,
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NULL, NULL);
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saved_error = -errno;
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if (!ASSERT_ERR_PTR(link, "fail_1"))
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goto cleanup;
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if (!ASSERT_EQ(saved_error, -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_manual,
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NULL, &opts);
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saved_error = -errno;
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if (!ASSERT_ERR_PTR(link, "fail_2"))
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goto cleanup;
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if (!ASSERT_EQ(saved_error, -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_manual,
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"ksys_*", &opts);
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saved_error = -errno;
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if (!ASSERT_ERR_PTR(link, "fail_3"))
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goto cleanup;
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if (!ASSERT_EQ(saved_error, -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_manual,
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"ksys_*", &opts);
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saved_error = -errno;
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if (!ASSERT_ERR_PTR(link, "fail_4"))
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goto cleanup;
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if (!ASSERT_EQ(saved_error, -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_manual,
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"ksys_*", &opts);
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saved_error = -errno;
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if (!ASSERT_ERR_PTR(link, "fail_5"))
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goto cleanup;
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if (!ASSERT_EQ(saved_error, -EINVAL, "fail_5_error"))
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goto cleanup;
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/* fail_6 - abnormal cnt */
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opts.addrs = (const unsigned long *) addrs;
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opts.syms = NULL;
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opts.cnt = INT_MAX;
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opts.cookies = NULL;
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link = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kprobe_manual,
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NULL, &opts);
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saved_error = -errno;
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if (!ASSERT_ERR_PTR(link, "fail_6"))
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goto cleanup;
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if (!ASSERT_EQ(saved_error, -E2BIG, "fail_6_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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static void test_session_skel_api(void)
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{
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struct kprobe_multi_session *skel = NULL;
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LIBBPF_OPTS(bpf_kprobe_multi_opts, opts);
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LIBBPF_OPTS(bpf_test_run_opts, topts);
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struct bpf_link *link = NULL;
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int i, err, prog_fd;
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skel = kprobe_multi_session__open_and_load();
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if (!ASSERT_OK_PTR(skel, "kprobe_multi_session__open_and_load"))
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return;
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skel->bss->pid = getpid();
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err = kprobe_multi_session__attach(skel);
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if (!ASSERT_OK(err, " kprobe_multi_session__attach"))
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goto cleanup;
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prog_fd = bpf_program__fd(skel->progs.trigger);
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err = bpf_prog_test_run_opts(prog_fd, &topts);
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ASSERT_OK(err, "test_run");
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ASSERT_EQ(topts.retval, 0, "test_run");
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/* bpf_fentry_test1-4 trigger return probe, result is 2 */
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for (i = 0; i < 4; i++)
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ASSERT_EQ(skel->bss->kprobe_session_result[i], 2, "kprobe_session_result");
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/* bpf_fentry_test5-8 trigger only entry probe, result is 1 */
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for (i = 4; i < 8; i++)
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ASSERT_EQ(skel->bss->kprobe_session_result[i], 1, "kprobe_session_result");
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cleanup:
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bpf_link__destroy(link);
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kprobe_multi_session__destroy(skel);
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}
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static void test_session_cookie_skel_api(void)
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{
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struct kprobe_multi_session_cookie *skel = NULL;
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LIBBPF_OPTS(bpf_kprobe_multi_opts, opts);
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LIBBPF_OPTS(bpf_test_run_opts, topts);
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struct bpf_link *link = NULL;
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int err, prog_fd;
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skel = kprobe_multi_session_cookie__open_and_load();
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if (!ASSERT_OK_PTR(skel, "fentry_raw_skel_load"))
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return;
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skel->bss->pid = getpid();
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err = kprobe_multi_session_cookie__attach(skel);
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if (!ASSERT_OK(err, " kprobe_multi_wrapper__attach"))
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goto cleanup;
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prog_fd = bpf_program__fd(skel->progs.trigger);
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err = bpf_prog_test_run_opts(prog_fd, &topts);
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ASSERT_OK(err, "test_run");
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ASSERT_EQ(topts.retval, 0, "test_run");
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ASSERT_EQ(skel->bss->test_kprobe_1_result, 1, "test_kprobe_1_result");
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ASSERT_EQ(skel->bss->test_kprobe_2_result, 2, "test_kprobe_2_result");
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ASSERT_EQ(skel->bss->test_kprobe_3_result, 3, "test_kprobe_3_result");
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cleanup:
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bpf_link__destroy(link);
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kprobe_multi_session_cookie__destroy(skel);
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}
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static void test_unique_match(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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skel = kprobe_multi__open_and_load();
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if (!ASSERT_OK_PTR(skel, "kprobe_multi__open_and_load"))
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return;
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opts.unique_match = true;
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skel->bss->pid = getpid();
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link = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kprobe_manual,
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"bpf_fentry_test*", &opts);
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if (!ASSERT_ERR_PTR(link, "bpf_program__attach_kprobe_multi_opts"))
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bpf_link__destroy(link);
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link = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kprobe_manual,
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"bpf_fentry_test8*", &opts);
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if (ASSERT_OK_PTR(link, "bpf_program__attach_kprobe_multi_opts"))
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bpf_link__destroy(link);
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kprobe_multi__destroy(skel);
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}
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static void do_bench_test(struct kprobe_multi_empty *skel, struct bpf_kprobe_multi_opts *opts)
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{
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long attach_start_ns, attach_end_ns;
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long detach_start_ns, detach_end_ns;
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double attach_delta, detach_delta;
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struct bpf_link *link = NULL;
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attach_start_ns = get_time_ns();
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link = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kprobe_empty,
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NULL, opts);
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attach_end_ns = get_time_ns();
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if (!ASSERT_OK_PTR(link, "bpf_program__attach_kprobe_multi_opts"))
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return;
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detach_start_ns = get_time_ns();
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bpf_link__destroy(link);
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detach_end_ns = get_time_ns();
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attach_delta = (attach_end_ns - attach_start_ns) / 1000000000.0;
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detach_delta = (detach_end_ns - detach_start_ns) / 1000000000.0;
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printf("%s: found %lu functions\n", __func__, opts->cnt);
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printf("%s: attached in %7.3lfs\n", __func__, attach_delta);
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printf("%s: detached in %7.3lfs\n", __func__, detach_delta);
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|
}
|
|
|
|
static void test_kprobe_multi_bench_attach(bool kernel)
|
|
{
|
|
LIBBPF_OPTS(bpf_kprobe_multi_opts, opts);
|
|
struct kprobe_multi_empty *skel = NULL;
|
|
char **syms = NULL;
|
|
size_t cnt = 0;
|
|
|
|
if (!ASSERT_OK(bpf_get_ksyms(&syms, &cnt, kernel), "bpf_get_ksyms"))
|
|
return;
|
|
|
|
skel = kprobe_multi_empty__open_and_load();
|
|
if (!ASSERT_OK_PTR(skel, "kprobe_multi_empty__open_and_load"))
|
|
goto cleanup;
|
|
|
|
opts.syms = (const char **) syms;
|
|
opts.cnt = cnt;
|
|
|
|
do_bench_test(skel, &opts);
|
|
|
|
cleanup:
|
|
kprobe_multi_empty__destroy(skel);
|
|
if (syms)
|
|
free(syms);
|
|
}
|
|
|
|
static void test_kprobe_multi_bench_attach_addr(bool kernel)
|
|
{
|
|
LIBBPF_OPTS(bpf_kprobe_multi_opts, opts);
|
|
struct kprobe_multi_empty *skel = NULL;
|
|
unsigned long *addrs = NULL;
|
|
size_t cnt = 0;
|
|
int err;
|
|
|
|
err = bpf_get_addrs(&addrs, &cnt, kernel);
|
|
if (err == -ENOENT) {
|
|
test__skip();
|
|
return;
|
|
}
|
|
|
|
if (!ASSERT_OK(err, "bpf_get_addrs"))
|
|
return;
|
|
|
|
skel = kprobe_multi_empty__open_and_load();
|
|
if (!ASSERT_OK_PTR(skel, "kprobe_multi_empty__open_and_load"))
|
|
goto cleanup;
|
|
|
|
opts.addrs = addrs;
|
|
opts.cnt = cnt;
|
|
|
|
do_bench_test(skel, &opts);
|
|
|
|
cleanup:
|
|
kprobe_multi_empty__destroy(skel);
|
|
free(addrs);
|
|
}
|
|
|
|
static void test_attach_override(void)
|
|
{
|
|
struct kprobe_multi_override *skel = NULL;
|
|
struct bpf_link *link = NULL;
|
|
|
|
skel = kprobe_multi_override__open_and_load();
|
|
if (!ASSERT_OK_PTR(skel, "kprobe_multi_empty__open_and_load"))
|
|
goto cleanup;
|
|
|
|
/* The test_override calls bpf_override_return so it should fail
|
|
* to attach to bpf_fentry_test1 function, which is not on error
|
|
* injection list.
|
|
*/
|
|
link = bpf_program__attach_kprobe_multi_opts(skel->progs.test_override,
|
|
"bpf_fentry_test1", NULL);
|
|
if (!ASSERT_ERR_PTR(link, "override_attached_bpf_fentry_test1")) {
|
|
bpf_link__destroy(link);
|
|
goto cleanup;
|
|
}
|
|
|
|
/* The should_fail_bio function is on error injection list,
|
|
* attach should succeed.
|
|
*/
|
|
link = bpf_program__attach_kprobe_multi_opts(skel->progs.test_override,
|
|
"should_fail_bio", NULL);
|
|
if (!ASSERT_OK_PTR(link, "override_attached_should_fail_bio"))
|
|
goto cleanup;
|
|
|
|
bpf_link__destroy(link);
|
|
|
|
cleanup:
|
|
kprobe_multi_override__destroy(skel);
|
|
}
|
|
|
|
#ifdef __x86_64__
|
|
static void test_attach_write_ctx(void)
|
|
{
|
|
struct kprobe_write_ctx *skel = NULL;
|
|
struct bpf_link *link = NULL;
|
|
|
|
skel = kprobe_write_ctx__open_and_load();
|
|
if (!ASSERT_OK_PTR(skel, "kprobe_write_ctx__open_and_load"))
|
|
return;
|
|
|
|
link = bpf_program__attach_kprobe_opts(skel->progs.kprobe_multi_write_ctx,
|
|
"bpf_fentry_test1", NULL);
|
|
if (!ASSERT_ERR_PTR(link, "bpf_program__attach_kprobe_opts"))
|
|
bpf_link__destroy(link);
|
|
|
|
kprobe_write_ctx__destroy(skel);
|
|
}
|
|
#else
|
|
static void test_attach_write_ctx(void)
|
|
{
|
|
test__skip();
|
|
}
|
|
#endif
|
|
|
|
void serial_test_kprobe_multi_bench_attach(void)
|
|
{
|
|
if (test__start_subtest("kernel"))
|
|
test_kprobe_multi_bench_attach(true);
|
|
if (test__start_subtest("modules"))
|
|
test_kprobe_multi_bench_attach(false);
|
|
if (test__start_subtest("kernel"))
|
|
test_kprobe_multi_bench_attach_addr(true);
|
|
if (test__start_subtest("modules"))
|
|
test_kprobe_multi_bench_attach_addr(false);
|
|
}
|
|
|
|
void test_kprobe_multi_test(void)
|
|
{
|
|
if (!ASSERT_OK(load_kallsyms(), "load_kallsyms"))
|
|
return;
|
|
|
|
if (test__start_subtest("skel_api"))
|
|
test_skel_api();
|
|
if (test__start_subtest("link_api_addrs"))
|
|
test_link_api_syms();
|
|
if (test__start_subtest("link_api_syms"))
|
|
test_link_api_addrs();
|
|
if (test__start_subtest("attach_api_pattern"))
|
|
test_attach_api_pattern();
|
|
if (test__start_subtest("attach_api_addrs"))
|
|
test_attach_api_addrs();
|
|
if (test__start_subtest("attach_api_syms"))
|
|
test_attach_api_syms();
|
|
if (test__start_subtest("attach_api_fails"))
|
|
test_attach_api_fails();
|
|
if (test__start_subtest("attach_override"))
|
|
test_attach_override();
|
|
if (test__start_subtest("session"))
|
|
test_session_skel_api();
|
|
if (test__start_subtest("session_cookie"))
|
|
test_session_cookie_skel_api();
|
|
if (test__start_subtest("unique_match"))
|
|
test_unique_match();
|
|
if (test__start_subtest("attach_write_ctx"))
|
|
test_attach_write_ctx();
|
|
RUN_TESTS(kprobe_multi_verifier);
|
|
}
|