torvalds/linux
3
0
Fork 0
mirror of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-03-28 18:27:42 +08:00
Code Issues Packages Projects Releases Wiki Activity

selftests/bpf: test bpf_get_func_* for fsession

Browse Source 
Test following bpf helper for fsession:
  bpf_get_func_arg()
  bpf_get_func_arg_cnt()
  bpf_get_func_ret()
  bpf_get_func_ip()

Signed-off-by: Menglong Dong <dongml2@chinatelecom.cn>
Link: https://lore.kernel.org/r/20260124062008.8657-12-dongml2@chinatelecom.cn
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Menglong Dong
2026-01-24 14:20:06 +08:00
committed by Alexei Starovoitov
parent f7afef5617
commit a5533a6eaa
4 changed files with 65 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
tools/testing/selftests/bpf/prog_tests/get_func_args_test.c
View File

@@ -41,6 +41,7 @@ void test_get_func_args_test(void)
ASSERT_EQ(skel->bss->test4_result, 1, "test4_result");
ASSERT_EQ(skel->bss->test5_result, 1, "test5_result");
ASSERT_EQ(skel->bss->test6_result, 1, "test6_result");
ASSERT_EQ(skel->bss->test7_result, 1, "test7_result");
cleanup:
get_func_args_test__destroy(skel);

2
tools/testing/selftests/bpf/prog_tests/get_func_ip_test.c
View File

@@ -46,6 +46,8 @@ static void test_function_entry(void)
ASSERT_EQ(skel->bss->test5_result, 1, "test5_result");
ASSERT_EQ(skel->bss->test7_result, 1, "test7_result");
ASSERT_EQ(skel->bss->test8_result, 1, "test8_result");
ASSERT_EQ(skel->bss->test9_entry_result, 1, "test9_entry_result");
ASSERT_EQ(skel->bss->test9_exit_result, 1, "test9_exit_result");
cleanup:
get_func_ip_test__destroy(skel);

40
tools/testing/selftests/bpf/progs/get_func_args_test.c
View File

@@ -1,5 +1,5 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/bpf.h>
#include <vmlinux.h>
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>
#include <errno.h>
@@ -165,3 +165,41 @@ int BPF_PROG(tp_test2)
return 0;
}
__u64 test7_result = 0;
#ifdef __TARGET_ARCH_x86
SEC("fsession/bpf_fentry_test1")
int BPF_PROG(test7)
{
__u64 cnt = bpf_get_func_arg_cnt(ctx);
__u64 a = 0, z = 0, ret = 0;
__s64 err;
test7_result = cnt == 1;
/* valid arguments */
err = bpf_get_func_arg(ctx, 0, &a);
test7_result &= err == 0 && ((int) a == 1);
/* not valid argument */
err = bpf_get_func_arg(ctx, 1, &z);
test7_result &= err == -EINVAL;
if (bpf_session_is_return(ctx)) {
err = bpf_get_func_ret(ctx, &ret);
test7_result &= err == 0 && ret == 2;
} else {
err = bpf_get_func_ret(ctx, &ret);
test7_result &= err == 0 && ret == 0;
}
return 0;
}
#else
SEC("fentry/bpf_fentry_test1")
int BPF_PROG(test7)
{
test7_result = 1;
return 0;
}
#endif

23
tools/testing/selftests/bpf/progs/get_func_ip_test.c
View File

@@ -103,3 +103,26 @@ int BPF_URETPROBE(test8, int ret)
test8_result = (const void *) addr == (const void *) uprobe_trigger;
return 0;
}
__u64 test9_entry_result = 0;
__u64 test9_exit_result = 0;
#ifdef __TARGET_ARCH_x86
SEC("fsession/bpf_fentry_test1")
int BPF_PROG(test9, int a)
{
__u64 addr = bpf_get_func_ip(ctx);
if (bpf_session_is_return(ctx))
test9_exit_result = (const void *) addr == &bpf_fentry_test1;
else
test9_entry_result = (const void *) addr == &bpf_fentry_test1;
return 0;
}
#else
SEC("fentry/bpf_fentry_test1")
int BPF_PROG(test9, int a)
{
test9_entry_result = test9_exit_result = 1;
return 0;
}
#endif