include/asm-generic/error-injection.h

   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__)
   6 enum {
   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 };
  12
  13 struct error_injection_entry {
  14         unsigned long   addr;
  15         int             etype;
  16 };
  17
  18 #ifdef CONFIG_FUNCTION_ERROR_INJECTION
  19 /*
  20  * Whitelist ganerating macro. Specify functions which can be
  21  * error-injectable using this macro.
  22  */
  23 #define ALLOW_ERROR_INJECTION(fname, _etype)                            \
  24 static struct error_injection_entry __used                              \
  25         __attribute__((__section__("_error_injection_whitelist")))      \
  26         _eil_addr_##fname = {                                           \
  27                 .addr = (unsigned long)fname,                           \
  28                 .etype = EI_ETYPE_##_etype,                             \
  29         };
  30 #else
  31 #define ALLOW_ERROR_INJECTION(fname, _etype)
  32 #endif
  33 #endif
  34
  35 #endif /* _ASM_GENERIC_ERROR_INJECTION_H */