mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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37b1b3ed20
Extend commit e3c9abd0d1 ("selftests/bpf: Implement setting global
variables in veristat") to support applying presets to members of
the global structs or unions in veristat.
For example:
```
./veristat set_global_vars.bpf.o -G "union1.struct3.var_u8_h = 0xBB"
```
Signed-off-by: Mykyta Yatsenko <yatsenko@meta.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20250408104544.140317-1-mykyta.yatsenko5@gmail.com
89 lines
1.7 KiB
C
89 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2025 Meta Platforms, Inc. and affiliates. */
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#include "bpf_experimental.h"
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#include <bpf/bpf_helpers.h>
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#include "bpf_misc.h"
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#include <stdbool.h>
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char _license[] SEC("license") = "GPL";
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enum Enum { EA1 = 0, EA2 = 11 };
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enum Enumu64 {EB1 = 0llu, EB2 = 12llu };
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enum Enums64 { EC1 = 0ll, EC2 = 13ll };
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const volatile __s64 var_s64 = -1;
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const volatile __u64 var_u64 = 0;
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const volatile __s32 var_s32 = -1;
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const volatile __u32 var_u32 = 0;
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const volatile __s16 var_s16 = -1;
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const volatile __u16 var_u16 = 0;
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const volatile __s8 var_s8 = -1;
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const volatile __u8 var_u8 = 0;
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const volatile enum Enum var_ea = EA1;
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const volatile enum Enumu64 var_eb = EB1;
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const volatile enum Enums64 var_ec = EC1;
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const volatile bool var_b = false;
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struct Struct {
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int:16;
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__u16 filler;
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struct {
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const __u16 filler2;
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};
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struct Struct2 {
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__u16 filler;
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volatile struct {
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const int:1;
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union {
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const volatile __u8 var_u8;
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const volatile __s16 filler3;
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const int:1;
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} u;
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};
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} struct2;
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};
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const volatile __u32 stru = 0; /* same prefix as below */
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const volatile struct Struct struct1 = {.struct2 = {.u = {.var_u8 = 1}}};
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union Union {
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__u16 var_u16;
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struct Struct3 {
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struct {
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__u8 var_u8_l;
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};
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struct {
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struct {
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__u8 var_u8_h;
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};
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};
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} struct3;
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};
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const volatile union Union union1 = {.var_u16 = -1};
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char arr[4] = {0};
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SEC("socket")
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int test_set_globals(void *ctx)
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{
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volatile __s8 a;
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a = var_s64;
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a = var_u64;
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a = var_s32;
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a = var_u32;
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a = var_s16;
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a = var_u16;
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a = var_s8;
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a = var_u8;
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a = var_ea;
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a = var_eb;
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a = var_ec;
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a = var_b;
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a = struct1.struct2.u.var_u8;
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a = union1.var_u16;
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return a;
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}
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