1540adea3SMasami Hiramatsu /* SPDX-License-Identifier: GPL-2.0 */ 2540adea3SMasami Hiramatsu #ifndef _ASM_GENERIC_ERROR_INJECTION_H 3540adea3SMasami Hiramatsu #define _ASM_GENERIC_ERROR_INJECTION_H 4540adea3SMasami Hiramatsu 5540adea3SMasami Hiramatsu #if defined(__KERNEL__) && !defined(__ASSEMBLY__) 6663faf9fSMasami Hiramatsu enum { 7663faf9fSMasami Hiramatsu EI_ETYPE_NONE, /* Dummy value for undefined case */ 8663faf9fSMasami Hiramatsu EI_ETYPE_NULL, /* Return NULL if failure */ 9663faf9fSMasami Hiramatsu EI_ETYPE_ERRNO, /* Return -ERRNO if failure */ 10663faf9fSMasami Hiramatsu EI_ETYPE_ERRNO_NULL, /* Return -ERRNO or NULL if failure */ 11af3b8544SBenjamin Poirier EI_ETYPE_TRUE, /* Return true if failure */ 12663faf9fSMasami Hiramatsu }; 13663faf9fSMasami Hiramatsu 14663faf9fSMasami Hiramatsu struct error_injection_entry { 15663faf9fSMasami Hiramatsu unsigned long addr; 16663faf9fSMasami Hiramatsu int etype; 17663faf9fSMasami Hiramatsu }; 18663faf9fSMasami Hiramatsu 1945880f7bSLeo Yan struct pt_regs; 2045880f7bSLeo Yan 21540adea3SMasami Hiramatsu #ifdef CONFIG_FUNCTION_ERROR_INJECTION 22540adea3SMasami Hiramatsu /* 23540adea3SMasami Hiramatsu * Whitelist ganerating macro. Specify functions which can be 24540adea3SMasami Hiramatsu * error-injectable using this macro. 25540adea3SMasami Hiramatsu */ 26663faf9fSMasami Hiramatsu #define ALLOW_ERROR_INJECTION(fname, _etype) \ 27663faf9fSMasami Hiramatsu static struct error_injection_entry __used \ 28540adea3SMasami Hiramatsu __attribute__((__section__("_error_injection_whitelist"))) \ 29663faf9fSMasami Hiramatsu _eil_addr_##fname = { \ 30663faf9fSMasami Hiramatsu .addr = (unsigned long)fname, \ 31663faf9fSMasami Hiramatsu .etype = EI_ETYPE_##_etype, \ 32663faf9fSMasami Hiramatsu }; 3345880f7bSLeo Yan 3445880f7bSLeo Yan void override_function_with_return(struct pt_regs *regs); 35540adea3SMasami Hiramatsu #else 36663faf9fSMasami Hiramatsu #define ALLOW_ERROR_INJECTION(fname, _etype) 3745880f7bSLeo Yan 3845880f7bSLeo Yan static inline void override_function_with_return(struct pt_regs *regs) { } 39540adea3SMasami Hiramatsu #endif 40540adea3SMasami Hiramatsu #endif 41540adea3SMasami Hiramatsu 42540adea3SMasami Hiramatsu #endif /* _ASM_GENERIC_ERROR_INJECTION_H */ 43