/* 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 */
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