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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_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 generating macro. Specify functions which can be error-injectable
* using this macro. If you unsure what is required for the error-injectable
* functions, please read Documentation/fault-injection/fault-injection.rst
* 'Error Injectable Functions' section.
*/
#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 */