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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_GENERIC_ERROR_INJECTION_H #define _ASM_GENERIC_ERROR_INJECTION_H #if defined(__KERNEL__) && !defined(__ASSEMBLY__) enum { EI_ETYPE_NONE, /* Dummy value for undefined case */ EI_ETYPE_NULL, /* Return NULL if failure */ EI_ETYPE_ERRNO, /* Return -ERRNO if failure */ EI_ETYPE_ERRNO_NULL, /* Return -ERRNO or NULL if failure */ EI_ETYPE_TRUE, /* Return true if failure */ }; struct error_injection_entry { unsigned long addr; int etype; }; struct pt_regs; #ifdef CONFIG_FUNCTION_ERROR_INJECTION /* * Whitelist ganerating macro. Specify functions which can be * error-injectable using this macro. */ #define ALLOW_ERROR_INJECTION(fname, _etype) \ static struct error_injection_entry __used \ __section("_error_injection_whitelist") \ _eil_addr_##fname = { \ .addr = (unsigned long)fname, \ .etype = EI_ETYPE_##_etype, \ }; void override_function_with_return(struct pt_regs *regs); #else #define ALLOW_ERROR_INJECTION(fname, _etype) static inline void override_function_with_return(struct pt_regs *regs) { } #endif #endif #endif /* _ASM_GENERIC_ERROR_INJECTION_H */