1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_GENERIC_ERROR_INJECTION_H
3#define _ASM_GENERIC_ERROR_INJECTION_H
4
5#if defined(__KERNEL__) && !defined(__ASSEMBLY__)
6enum {
7 EI_ETYPE_NONE, /* Dummy value for undefined case */
8 EI_ETYPE_NULL, /* Return NULL if failure */
9 EI_ETYPE_ERRNO, /* Return -ERRNO if failure */
10 EI_ETYPE_ERRNO_NULL, /* Return -ERRNO or NULL if failure */
11 EI_ETYPE_TRUE, /* Return true if failure */
12};
13
14struct error_injection_entry {
15 unsigned long addr;
16 int etype;
17};
18
19#ifdef CONFIG_FUNCTION_ERROR_INJECTION
20/*
21 * Whitelist ganerating macro. Specify functions which can be
22 * error-injectable using this macro.
23 */
24#define ALLOW_ERROR_INJECTION(fname, _etype) \
25static struct error_injection_entry __used \
26 __attribute__((__section__("_error_injection_whitelist"))) \
27 _eil_addr_##fname = { \
28 .addr = (unsigned long)fname, \
29 .etype = EI_ETYPE_##_etype, \
30 };
31#else
32#define ALLOW_ERROR_INJECTION(fname, _etype)
33#endif
34#endif
35
36#endif /* _ASM_GENERIC_ERROR_INJECTION_H */
37