From: Jiri Olsa Date: Sat, 6 Jun 2026 12:39:50 +0000 (+0200) Subject: selftests/bpf: Add tracing multi session test X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=69f25d4b0c17cc947ce26391cac0015182b07dc0;p=thirdparty%2Fkernel%2Flinux.git selftests/bpf: Add tracing multi session test Adding tests for tracing multi link session. Signed-off-by: Jiri Olsa Link: https://lore.kernel.org/r/20260606123955.345967-26-jolsa@kernel.org Signed-off-by: Alexei Starovoitov --- diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile index 2b5688c970065..d53b7e496ac91 100644 --- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -514,7 +514,8 @@ LINKED_SKELS := test_static_linked.skel.h linked_funcs.skel.h \ test_subskeleton.skel.h test_subskeleton_lib.skel.h \ test_usdt.skel.h tracing_multi.skel.h \ tracing_multi_module.skel.h \ - tracing_multi_intersect.skel.h + tracing_multi_intersect.skel.h \ + tracing_multi_session.skel.h LSKELS := fexit_sleep.c trace_printk.c trace_vprintk.c map_ptr_kern.c \ core_kern.c core_kern_overflow.c test_ringbuf.c \ @@ -543,6 +544,7 @@ xdp_features.skel.h-deps := xdp_features.bpf.o tracing_multi.skel.h-deps := tracing_multi_attach.bpf.o tracing_multi_check.bpf.o tracing_multi_module.skel.h-deps := tracing_multi_attach_module.bpf.o tracing_multi_check.bpf.o tracing_multi_intersect.skel.h-deps := tracing_multi_intersect_attach.bpf.o tracing_multi_check.bpf.o +tracing_multi_session.skel.h-deps := tracing_multi_session_attach.bpf.o tracing_multi_check.bpf.o LINKED_BPF_OBJS := $(foreach skel,$(LINKED_SKELS),$($(skel)-deps)) LINKED_BPF_SRCS := $(patsubst %.bpf.o,%.c,$(LINKED_BPF_OBJS)) diff --git a/tools/testing/selftests/bpf/prog_tests/tracing_multi.c b/tools/testing/selftests/bpf/prog_tests/tracing_multi.c index 0f066063cb827..05683b8d06806 100644 --- a/tools/testing/selftests/bpf/prog_tests/tracing_multi.c +++ b/tools/testing/selftests/bpf/prog_tests/tracing_multi.c @@ -7,6 +7,7 @@ #include "tracing_multi.skel.h" #include "tracing_multi_module.skel.h" #include "tracing_multi_intersect.skel.h" +#include "tracing_multi_session.skel.h" #include "trace_helpers.h" static __u64 bpf_fentry_test_cookies[] = { @@ -455,6 +456,48 @@ static void test_intersect(void) tracing_multi_intersect__destroy(skel); } +static void test_session(void) +{ + LIBBPF_OPTS(bpf_test_run_opts, topts); + struct tracing_multi_session *skel; + int err, prog_fd; + + skel = tracing_multi_session__open_and_load(); + if (!ASSERT_OK_PTR(skel, "tracing_multi_session__open_and_load")) + return; + + skel->bss->pid = getpid(); + + err = tracing_multi_session__attach(skel); + if (!ASSERT_OK(err, "tracing_multi_session__attach")) + goto cleanup; + + /* execute kernel session */ + prog_fd = bpf_program__fd(skel->progs.test_session_1); + err = bpf_prog_test_run_opts(prog_fd, &topts); + ASSERT_OK(err, "test_run"); + + /* 10 for test_session_1, 1 for test_fsession_s */ + ASSERT_EQ(skel->bss->test_result_fentry, 11, "test_result_fentry"); + /* extra count (+1 for each fexit execution) for test_result_fexit cookie check/inc */ + ASSERT_EQ(skel->bss->test_result_fexit, 22, "test_result_fexit"); + + skel->bss->test_result_fentry = 0; + skel->bss->test_result_fexit = 0; + + /* execute bpf_testmo.ko session */ + ASSERT_OK(trigger_module_test_read(1), "trigger_read"); + + /* 5 for test_session_2 */ + ASSERT_EQ(skel->bss->test_result_fentry, 5, "test_result_fentry"); + /* extra count (+1 for each fexit execution) for test_result_fexit cookie */ + ASSERT_EQ(skel->bss->test_result_fexit, 10, "test_result_fexit"); + + +cleanup: + tracing_multi_session__destroy(skel); +} + void test_tracing_multi_test(void) { #ifndef __x86_64__ @@ -478,4 +521,6 @@ void test_tracing_multi_test(void) test_intersect(); if (test__start_subtest("cookies")) test_link_api_ids(true); + if (test__start_subtest("session")) + test_session(); } diff --git a/tools/testing/selftests/bpf/progs/tracing_multi_session_attach.c b/tools/testing/selftests/bpf/progs/tracing_multi_session_attach.c new file mode 100644 index 0000000000000..7c9a46016ccd7 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/tracing_multi_session_attach.c @@ -0,0 +1,65 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include + +char _license[] SEC("license") = "GPL"; + +__hidden extern int tracing_multi_arg_check(__u64 *ctx, __u64 *test_result, bool is_return); + +__u64 test_result_fentry = 0; +__u64 test_result_fexit = 0; + +SEC("fsession.multi/bpf_fentry_test*") +int BPF_PROG(test_session_1) +{ + volatile __u64 *cookie = bpf_session_cookie(ctx); + + if (bpf_session_is_return(ctx)) { + if (tracing_multi_arg_check(ctx, &test_result_fexit, true)) + return 0; + /* extra count for test_result_fexit cookie */ + test_result_fexit += *cookie == 0xbeafbeafbeafbeaf; + } else { + if (tracing_multi_arg_check(ctx, &test_result_fentry, false)) + return 0; + *cookie = 0xbeafbeafbeafbeaf; + } + return 0; +} + +SEC("fsession.multi.s/bpf_fentry_test1") +int BPF_PROG(test_fsession_s) +{ + volatile __u64 *cookie = bpf_session_cookie(ctx); + + if (bpf_session_is_return(ctx)) { + if (tracing_multi_arg_check(ctx, &test_result_fexit, true)) + return 0; + /* extra count for test_result_fexit cookie */ + test_result_fexit += *cookie == 0xbeafbeafbeafbeaf; + } else { + if (tracing_multi_arg_check(ctx, &test_result_fentry, false)) + return 0; + *cookie = 0xbeafbeafbeafbeaf; + } + return 0; +} + +SEC("fsession.multi/bpf_testmod:bpf_testmod_fentry_test*") +int BPF_PROG(test_session_2) +{ + volatile __u64 *cookie = bpf_session_cookie(ctx); + + if (bpf_session_is_return(ctx)) { + if (tracing_multi_arg_check(ctx, &test_result_fexit, true)) + return 0; + /* extra count for test_result_fexit cookie */ + test_result_fexit += *cookie == 0xbeafbeafbeafbeaf; + } else { + if (tracing_multi_arg_check(ctx, &test_result_fentry, false)) + return 0; + *cookie = 0xbeafbeafbeafbeaf; + } + return 0; +}