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1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _ASM_GENERIC_ERROR_INJECTION_H | |
3 | #define _ASM_GENERIC_ERROR_INJECTION_H | |
4 | ||
5 | #if defined(__KERNEL__) && !defined(__ASSEMBLY__) | |
663faf9f | 6 | enum { |
663faf9f MH |
7 | EI_ETYPE_NULL, /* Return NULL if failure */ |
8 | EI_ETYPE_ERRNO, /* Return -ERRNO if failure */ | |
9 | EI_ETYPE_ERRNO_NULL, /* Return -ERRNO or NULL if failure */ | |
af3b8544 | 10 | EI_ETYPE_TRUE, /* Return true if failure */ |
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11 | }; |
12 | ||
13 | struct error_injection_entry { | |
14 | unsigned long addr; | |
15 | int etype; | |
16 | }; | |
17 | ||
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18 | struct pt_regs; |
19 | ||
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20 | #ifdef CONFIG_FUNCTION_ERROR_INJECTION |
21 | /* | |
bef7ec4e MHG |
22 | * Whitelist generating macro. Specify functions which can be error-injectable |
23 | * using this macro. If you unsure what is required for the error-injectable | |
24 | * functions, please read Documentation/fault-injection/fault-injection.rst | |
25 | * 'Error Injectable Functions' section. | |
540adea3 | 26 | */ |
663faf9f MH |
27 | #define ALLOW_ERROR_INJECTION(fname, _etype) \ |
28 | static struct error_injection_entry __used \ | |
33def849 | 29 | __section("_error_injection_whitelist") \ |
663faf9f MH |
30 | _eil_addr_##fname = { \ |
31 | .addr = (unsigned long)fname, \ | |
32 | .etype = EI_ETYPE_##_etype, \ | |
733e4175 | 33 | } |
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34 | |
35 | void override_function_with_return(struct pt_regs *regs); | |
540adea3 | 36 | #else |
663faf9f | 37 | #define ALLOW_ERROR_INJECTION(fname, _etype) |
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38 | |
39 | static inline void override_function_with_return(struct pt_regs *regs) { } | |
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40 | #endif |
41 | #endif | |
42 | ||
43 | #endif /* _ASM_GENERIC_ERROR_INJECTION_H */ |