mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-29 05:44:11 +00:00
selftests/bpf: Add byte swapping selftest
Add simple selftest validating byte swap built-ins and compile-time macros. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20200630152125.3631920-3-andriin@fb.com
This commit is contained in:
parent
30ad688094
commit
8c18311067
2 changed files with 90 additions and 0 deletions
53
tools/testing/selftests/bpf/prog_tests/endian.c
Normal file
53
tools/testing/selftests/bpf/prog_tests/endian.c
Normal file
|
@ -0,0 +1,53 @@
|
|||
// SPDX-License-Identifier: GPL-2.0
|
||||
/* Copyright (c) 2020 Facebook */
|
||||
|
||||
#include <test_progs.h>
|
||||
#include "test_endian.skel.h"
|
||||
|
||||
static int duration;
|
||||
|
||||
#define IN16 0x1234
|
||||
#define IN32 0x12345678U
|
||||
#define IN64 0x123456789abcdef0ULL
|
||||
|
||||
#define OUT16 0x3412
|
||||
#define OUT32 0x78563412U
|
||||
#define OUT64 0xf0debc9a78563412ULL
|
||||
|
||||
void test_endian(void)
|
||||
{
|
||||
struct test_endian* skel;
|
||||
struct test_endian__bss *bss;
|
||||
int err;
|
||||
|
||||
skel = test_endian__open_and_load();
|
||||
if (CHECK(!skel, "skel_open", "failed to open skeleton\n"))
|
||||
return;
|
||||
bss = skel->bss;
|
||||
|
||||
bss->in16 = IN16;
|
||||
bss->in32 = IN32;
|
||||
bss->in64 = IN64;
|
||||
|
||||
err = test_endian__attach(skel);
|
||||
if (CHECK(err, "skel_attach", "skeleton attach failed: %d\n", err))
|
||||
goto cleanup;
|
||||
|
||||
usleep(1);
|
||||
|
||||
CHECK(bss->out16 != OUT16, "out16", "got 0x%llx != exp 0x%llx\n",
|
||||
(__u64)bss->out16, (__u64)OUT16);
|
||||
CHECK(bss->out32 != OUT32, "out32", "got 0x%llx != exp 0x%llx\n",
|
||||
(__u64)bss->out32, (__u64)OUT32);
|
||||
CHECK(bss->out64 != OUT64, "out16", "got 0x%llx != exp 0x%llx\n",
|
||||
(__u64)bss->out64, (__u64)OUT64);
|
||||
|
||||
CHECK(bss->const16 != OUT16, "const16", "got 0x%llx != exp 0x%llx\n",
|
||||
(__u64)bss->const16, (__u64)OUT16);
|
||||
CHECK(bss->const32 != OUT32, "const32", "got 0x%llx != exp 0x%llx\n",
|
||||
(__u64)bss->const32, (__u64)OUT32);
|
||||
CHECK(bss->const64 != OUT64, "const64", "got 0x%llx != exp 0x%llx\n",
|
||||
(__u64)bss->const64, (__u64)OUT64);
|
||||
cleanup:
|
||||
test_endian__destroy(skel);
|
||||
}
|
37
tools/testing/selftests/bpf/progs/test_endian.c
Normal file
37
tools/testing/selftests/bpf/progs/test_endian.c
Normal file
|
@ -0,0 +1,37 @@
|
|||
// SPDX-License-Identifier: GPL-2.0
|
||||
/* Copyright (c) 2020 Facebook */
|
||||
|
||||
#include "vmlinux.h"
|
||||
#include <bpf/bpf_helpers.h>
|
||||
#include <bpf/bpf_endian.h>
|
||||
|
||||
#define IN16 0x1234
|
||||
#define IN32 0x12345678U
|
||||
#define IN64 0x123456789abcdef0ULL
|
||||
|
||||
__u16 in16 = 0;
|
||||
__u32 in32 = 0;
|
||||
__u64 in64 = 0;
|
||||
|
||||
__u16 out16 = 0;
|
||||
__u32 out32 = 0;
|
||||
__u64 out64 = 0;
|
||||
|
||||
__u16 const16 = 0;
|
||||
__u32 const32 = 0;
|
||||
__u64 const64 = 0;
|
||||
|
||||
SEC("raw_tp/sys_enter")
|
||||
int sys_enter(const void *ctx)
|
||||
{
|
||||
out16 = __builtin_bswap16(in16);
|
||||
out32 = __builtin_bswap32(in32);
|
||||
out64 = __builtin_bswap64(in64);
|
||||
const16 = ___bpf_swab16(IN16);
|
||||
const32 = ___bpf_swab32(IN32);
|
||||
const64 = ___bpf_swab64(IN64);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
char _license[] SEC("license") = "GPL";
|
Loading…
Reference in a new issue