Adding selftest for fexit multi func test that attaches
to bpf_fentry_test* functions and checks argument values
based on the processed function.
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
---
tools/testing/selftests/bpf/Makefile | 3 +-
.../bpf/prog_tests/multi_fexit_test.c | 31 +++++++++++++++++++
.../testing/selftests/bpf/progs/multi_check.c | 23 ++++++++++++++
.../testing/selftests/bpf/progs/multi_fexit.c | 20 ++++++++++++
4 files changed, 76 insertions(+), 1 deletion(-)
create mode 100644 tools/testing/selftests/bpf/prog_tests/multi_fexit_test.c
create mode 100644 tools/testing/selftests/bpf/progs/multi_fexit.c
diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index fa29ddd47cbe..42b67834d803 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -323,7 +323,7 @@ SKEL_BLACKLIST := btf__% test_pinning_invalid.c test_sk_assign.c
LINKED_SKELS := test_static_linked.skel.h linked_funcs.skel.h \
linked_vars.skel.h linked_maps.skel.h \
- multi_fentry_test.skel.h
+ multi_fentry_test.skel.h multi_fexit_test.skel.h
LSKELS := kfunc_call_test.c fentry_test.c fexit_test.c fexit_sleep.c \
test_ringbuf.c atomics.c trace_printk.c trace_vprintk.c
@@ -336,6 +336,7 @@ linked_funcs.skel.h-deps := linked_funcs1.o linked_funcs2.o
linked_vars.skel.h-deps := linked_vars1.o linked_vars2.o
linked_maps.skel.h-deps := linked_maps1.o linked_maps2.o
multi_fentry_test.skel.h-deps := multi_fentry.o multi_check.o
+multi_fexit_test.skel.h-deps := multi_fexit.o multi_check.o
LINKED_BPF_SRCS := $(patsubst %.o,%.c,$(foreach skel,$(LINKED_SKELS),$($(skel)-deps)))
diff --git a/tools/testing/selftests/bpf/prog_tests/multi_fexit_test.c b/tools/testing/selftests/bpf/prog_tests/multi_fexit_test.c
new file mode 100644
index 000000000000..d9b0eedd9f45
--- /dev/null
+++ b/tools/testing/selftests/bpf/prog_tests/multi_fexit_test.c
@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <test_progs.h>
+#include "multi_fexit_test.skel.h"
+#include "trace_helpers.h"
+
+void test_multi_fexit_test(void)
+{
+ struct multi_fexit_test *skel = NULL;
+ __u32 duration = 0, retval;
+ int err, prog_fd;
+
+ skel = multi_fexit_test__open_and_load();
+ if (!ASSERT_OK_PTR(skel, "fexit_multi_skel_load"))
+ goto cleanup;
+
+ err = multi_fexit_test__attach(skel);
+ if (!ASSERT_OK(err, "fexit_attach"))
+ goto cleanup;
+
+ prog_fd = bpf_program__fd(skel->progs.test);
+ err = bpf_prog_test_run(prog_fd, 1, NULL, 0,
+ NULL, NULL, &retval, &duration);
+ ASSERT_OK(err, "test_run");
+ ASSERT_EQ(retval, 0, "test_run");
+
+ ASSERT_EQ(skel->bss->test_arg_result, 8, "fexit_multi_arg_result");
+ ASSERT_EQ(skel->bss->test_ret_result, 8, "fexit_multi_ret_result");
+
+cleanup:
+ multi_fexit_test__destroy(skel);
+}
diff --git a/tools/testing/selftests/bpf/progs/multi_check.c b/tools/testing/selftests/bpf/progs/multi_check.c
index 82acc9ee7715..2f14d232dd77 100644
--- a/tools/testing/selftests/bpf/progs/multi_check.c
+++ b/tools/testing/selftests/bpf/progs/multi_check.c
@@ -61,3 +61,26 @@ void multi_arg_check(__u64 *ctx, __u64 *test_result)
*test_result += 1;
}
}
+
+void multi_ret_check(void *ctx, __u64 *test_result)
+{
+ void *ip = (void *) bpf_get_func_ip(ctx);
+ int ret = (int) bpf_ret_value(ctx);
+
+ if (ip == &bpf_fentry_test1)
+ *test_result += ret == 2;
+ else if (ip == &bpf_fentry_test2)
+ *test_result += ret == 5;
+ else if (ip == &bpf_fentry_test3)
+ *test_result += ret == 15;
+ else if (ip == &bpf_fentry_test4)
+ *test_result += ret == 34;
+ else if (ip == &bpf_fentry_test5)
+ *test_result += ret == 65;
+ else if (ip == &bpf_fentry_test6)
+ *test_result += ret == 111;
+ else if (ip == &bpf_fentry_test7)
+ *test_result += ret == 0;
+ else if (ip == &bpf_fentry_test8)
+ *test_result += ret == 0;
+}
diff --git a/tools/testing/selftests/bpf/progs/multi_fexit.c b/tools/testing/selftests/bpf/progs/multi_fexit.c
new file mode 100644
index 000000000000..54624acc7071
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/multi_fexit.c
@@ -0,0 +1,20 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/bpf.h>
+#include <bpf/bpf_helpers.h>
+#include <bpf/bpf_tracing.h>
+
+char _license[] SEC("license") = "GPL";
+
+__hidden extern void multi_arg_check(__u64 *ctx, __u64 *test_result);
+__hidden extern void multi_ret_check(void *ctx, __u64 *test_result);
+
+__u64 test_arg_result = 0;
+__u64 test_ret_result = 0;
+
+SEC("fexit.multi/bpf_fentry_test*")
+int BPF_PROG(test)
+{
+ multi_arg_check(ctx, &test_arg_result);
+ multi_ret_check(ctx, &test_ret_result);
+ return 0;
+}
--
2.31.1
