mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-10-28 12:53:14 +01:00
Masami Hiramatsu (Google)
bef7ec4e8f
Add a section about the requirements of the error injectable functions and the type of errors. Since this section must be read before using ALLOW_ERROR_INJECTION() macro, that section is referred from the comment of the macro too. Link: https://lkml.kernel.org/r/167081321427.387937.15475445689482551048.stgit@devnote3 Link: https://lore.kernel.org/all/[email protected]/T/#u Signed-off-by: Masami Hiramatsu (Google) <[email protected]> Cc: Alexei Starovoitov <[email protected]> Cc: Borislav Petkov (AMD) <[email protected]> Cc: Chris Mason <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: Florent Revest <[email protected]> Cc: Greg Kroah-Hartman <[email protected]> Cc: Jonathan Corbet <[email protected]> Cc: Josh Poimboeuf <[email protected]> Cc: Kees Cook <[email protected]> Cc: KP Singh <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Steven Rostedt (Google) <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
44 lines
1.3 KiB
C
44 lines
1.3 KiB
C
/* 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 */
|