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