In this commit, we add the testcases for multiple attaching of tracing, include FENTRY, FEXIT, MODIFY_RETURN.
Signed-off-by: Menglong Dong <[email protected]> --- .../selftests/bpf/bpf_testmod/bpf_testmod.c | 49 ++++++ .../bpf/prog_tests/tracing_multi_attach.c | 155 ++++++++++++++++++ .../selftests/bpf/progs/tracing_multi_test.c | 72 ++++++++ 3 files changed, 276 insertions(+) create mode 100644 tools/testing/selftests/bpf/prog_tests/tracing_multi_attach.c create mode 100644 tools/testing/selftests/bpf/progs/tracing_multi_test.c diff --git a/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c b/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c index 66787e99ba1b..237eeb7daa07 100644 --- a/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c +++ b/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c @@ -98,12 +98,61 @@ bpf_testmod_test_struct_arg_8(u64 a, void *b, short c, int d, void *e, return bpf_testmod_test_struct_arg_result; } +noinline int +bpf_testmod_test_struct_arg_9(struct bpf_testmod_struct_arg_2 a, + struct bpf_testmod_struct_arg_1 b) { + bpf_testmod_test_struct_arg_result = a.a + a.b + b.a; + return bpf_testmod_test_struct_arg_result; +} + +noinline int +bpf_testmod_test_struct_arg_10(int a, struct bpf_testmod_struct_arg_2 b) { + bpf_testmod_test_struct_arg_result = a + b.a + b.b; + return bpf_testmod_test_struct_arg_result; +} + +noinline struct bpf_testmod_struct_arg_2 * +bpf_testmod_test_struct_arg_11(int a, struct bpf_testmod_struct_arg_2 b, int c) { + bpf_testmod_test_struct_arg_result = a + b.a + b.b + c; + return (void *)bpf_testmod_test_struct_arg_result; +} + +noinline int +bpf_testmod_test_struct_arg_12(int a, struct bpf_testmod_struct_arg_2 b, int *c) { + bpf_testmod_test_struct_arg_result = a + b.a + b.b + *c; + return bpf_testmod_test_struct_arg_result; +} + noinline int bpf_testmod_test_arg_ptr_to_struct(struct bpf_testmod_struct_arg_1 *a) { bpf_testmod_test_struct_arg_result = a->a; return bpf_testmod_test_struct_arg_result; } +noinline int +bpf_testmod_test_arg_ptr_1(struct bpf_testmod_struct_arg_1 *a) { + bpf_testmod_test_struct_arg_result = a->a; + return bpf_testmod_test_struct_arg_result; +} + +noinline int +bpf_testmod_test_arg_ptr_2(struct bpf_testmod_struct_arg_2 *a) { + bpf_testmod_test_struct_arg_result = a->a + a->b; + return bpf_testmod_test_struct_arg_result; +} + +noinline int +bpf_testmod_test_arg_ptr_3(int a, struct bpf_testmod_struct_arg_2 *b) { + bpf_testmod_test_struct_arg_result = a + b->a + b->b; + return bpf_testmod_test_struct_arg_result; +} + +noinline int +bpf_testmod_test_arg_ptr_4(struct bpf_testmod_struct_arg_2 *a, int b) { + bpf_testmod_test_struct_arg_result = a->a + a->b + b; + return bpf_testmod_test_struct_arg_result; +} + __bpf_kfunc void bpf_testmod_test_mod_kfunc(int i) { diff --git a/tools/testing/selftests/bpf/prog_tests/tracing_multi_attach.c b/tools/testing/selftests/bpf/prog_tests/tracing_multi_attach.c new file mode 100644 index 000000000000..6162d41cca9e --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/tracing_multi_attach.c @@ -0,0 +1,155 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2024 Bytedance. */ + +#include <test_progs.h> +#include "tracing_multi_test.skel.h" + +struct test_item { + char *prog; + char *target; + int attach_type; + bool success; + int link_fd; +}; + +static struct test_item test_items[] = { + { + .prog = "fentry_test1", .target = "bpf_testmod_test_struct_arg_9", + .attach_type = BPF_TRACE_FENTRY, .success = true, + }, + { + .prog = "fentry_test1", .target = "bpf_testmod_test_struct_arg_1", + .attach_type = BPF_TRACE_FENTRY, .success = false, + }, + { + .prog = "fentry_test1", .target = "bpf_testmod_test_struct_arg_2", + .attach_type = BPF_TRACE_FENTRY, .success = false, + }, + { + .prog = "fentry_test1", .target = "bpf_testmod_test_arg_ptr_2", + .attach_type = BPF_TRACE_FENTRY, .success = false, + }, + { + .prog = "fentry_test2", .target = "bpf_testmod_test_struct_arg_2", + .attach_type = BPF_TRACE_FENTRY, .success = false, + }, + { + .prog = "fentry_test2", .target = "bpf_testmod_test_struct_arg_10", + .attach_type = BPF_TRACE_FENTRY, .success = true, + }, + { + .prog = "fentry_test2", .target = "bpf_testmod_test_struct_arg_9", + .attach_type = BPF_TRACE_FENTRY, .success = false, + }, + { + .prog = "fentry_test2", .target = "bpf_testmod_test_arg_ptr_3", + .attach_type = BPF_TRACE_FENTRY, .success = false, + }, + { + .prog = "fentry_test3", .target = "bpf_testmod_test_arg_ptr_3", + .attach_type = BPF_TRACE_FENTRY, .success = false, + }, + { + .prog = "fentry_test3", .target = "bpf_testmod_test_arg_ptr_4", + .attach_type = BPF_TRACE_FENTRY, .success = true, + }, + { + .prog = "fentry_test4", .target = "bpf_testmod_test_struct_arg_4", + .attach_type = BPF_TRACE_FENTRY, .success = true, + }, + { + .prog = "fentry_test4", .target = "bpf_testmod_test_struct_arg_2", + .attach_type = BPF_TRACE_FENTRY, .success = true, + }, + { + .prog = "fentry_test4", .target = "bpf_testmod_test_struct_arg_12", + .attach_type = BPF_TRACE_FENTRY, .success = false, + }, + { + .prog = "fexit_test1", .target = "bpf_testmod_test_struct_arg_2", + .attach_type = BPF_TRACE_FEXIT, .success = true, + }, + { + .prog = "fexit_test1", .target = "bpf_testmod_test_struct_arg_3", + .attach_type = BPF_TRACE_FEXIT, .success = true, + }, + { + .prog = "fexit_test1", .target = "bpf_testmod_test_struct_arg_4", + .attach_type = BPF_TRACE_FEXIT, .success = false, + }, + { + .prog = "fexit_test2", .target = "bpf_testmod_test_struct_arg_10", + .attach_type = BPF_TRACE_FEXIT, .success = false, + }, + { + .prog = "fexit_test2", .target = "bpf_testmod_test_struct_arg_11", + .attach_type = BPF_TRACE_FEXIT, .success = false, + }, + { + .prog = "fexit_test2", .target = "bpf_testmod_test_struct_arg_12", + .attach_type = BPF_TRACE_FEXIT, .success = true, + }, + { + .prog = "fmod_ret_test1", .target = "bpf_modify_return_test2", + .attach_type = BPF_MODIFY_RETURN, .success = true, + }, +}; + +static int do_test_item(struct tracing_multi_test *skel, struct test_item *item) +{ + LIBBPF_OPTS(bpf_link_create_opts, link_opts); + struct bpf_program *prog; + int err, btf_fd = 0, btf_type_id; + + err = libbpf_find_kernel_btf_id(item->target, item->attach_type, + &btf_fd, &btf_type_id); + if (!ASSERT_OK(err, "find_vmlinux_btf_id")) + return -1; + + link_opts.target_btf_id = btf_type_id; + prog = bpf_object__find_program_by_name(skel->obj, item->prog); + if (!ASSERT_OK_PTR(prog, "find_program_by_name")) + return -1; + + err = bpf_link_create(bpf_program__fd(prog), btf_fd, item->attach_type, + &link_opts); + item->link_fd = err; + if (item->success) { + if (!ASSERT_GE(err, 0, "link_create")) + return -1; + } else { + if (!ASSERT_LT(err, 0, "link_create")) + return -1; + } + + return 0; +} + +void test_tracing_multi_attach(void) +{ + struct tracing_multi_test *skel; + int i = 0, err, fd; + + skel = tracing_multi_test__open_and_load(); + if (!ASSERT_OK_PTR(skel, "tracing_multi_test__open_and_load")) + return; + + err = tracing_multi_test__attach(skel); + if (!ASSERT_OK(err, "tracing_multi_test__attach")) + goto destroy_skel; + + for (; i < ARRAY_SIZE(test_items); i++) { + if (do_test_item(skel, &test_items[i])) + break; + } + + for (i = 0; i < ARRAY_SIZE(test_items); i++) { + fd = test_items[i].link_fd; + if (fd >= 0) + close(fd); + } + + tracing_multi_test__detach(skel); +destroy_skel: + tracing_multi_test__destroy(skel); +} diff --git a/tools/testing/selftests/bpf/progs/tracing_multi_test.c b/tools/testing/selftests/bpf/progs/tracing_multi_test.c new file mode 100644 index 000000000000..f1ca8b64ed16 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/tracing_multi_test.c @@ -0,0 +1,72 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2024 ByteDance */ +#include <linux/bpf.h> +#include <bpf/bpf_helpers.h> +#include <bpf/bpf_tracing.h> + +char _license[] SEC("license") = "GPL"; + +struct bpf_testmod_struct_arg_1 { + int a; +}; +struct bpf_testmod_struct_arg_2 { + long a; + long b; +}; + +__u64 fentry_test1_result = 0; +SEC("fentry/bpf_testmod_test_struct_arg_1") +int BPF_PROG2(fentry_test1, struct bpf_testmod_struct_arg_2, a) +{ + fentry_test1_result = a.a + a.b; + return 0; +} + +__u64 fentry_test2_result = 0; +SEC("fentry/bpf_testmod_test_struct_arg_2") +int BPF_PROG2(fentry_test2, int, a, struct bpf_testmod_struct_arg_2, b) +{ + fentry_test2_result = a + b.a + b.b; + return 0; +} + +__u64 fentry_test3_result = 0; +SEC("fentry/bpf_testmod_test_arg_ptr_2") +int BPF_PROG(fentry_test3, struct bpf_testmod_struct_arg_2 *a) +{ + fentry_test3_result = a->a + a->b; + return 0; +} + +__u64 fentry_test4_result = 0; +SEC("fentry/bpf_testmod_test_struct_arg_1") +int BPF_PROG2(fentry_test4, struct bpf_testmod_struct_arg_2, a, int, b, + int, c) +{ + fentry_test3_result = c; + return 0; +} + +__u64 fexit_test1_result = 0; +SEC("fexit/bpf_testmod_test_struct_arg_1") +int BPF_PROG2(fexit_test1, struct bpf_testmod_struct_arg_2, a, int, b, + int, c, int, retval) +{ + fexit_test1_result = retval; + return 0; +} + +__u64 fexit_test2_result = 0; +SEC("fexit/bpf_testmod_test_struct_arg_2") +int BPF_PROG2(fexit_test2, int, a, struct bpf_testmod_struct_arg_2, b, + int, c, int, retval) +{ + fexit_test2_result = a + b.a + b.b + retval; + return 0; +} + +SEC("fmod_ret/bpf_modify_return_test") +int BPF_PROG(fmod_ret_test1, int a, int *b) +{ + return 0; +} -- 2.39.2
