panic.h

  1/* SPDX-License-Identifier: GPL-2.0 */
  2#ifndef _LINUX_PANIC_H
  3#define _LINUX_PANIC_H
  4
  5#include <linux/compiler_attributes.h>
  6#include <linux/stdarg.h>
  7#include <linux/types.h>
  8
  9struct pt_regs;
 10
 11extern long (*panic_blink)(int state);
 12__printf(1, 2)
 13void panic(const char *fmt, ...) __noreturn __cold;
 14__printf(1, 0)
 15void vpanic(const char *fmt, va_list args) __noreturn __cold;
 16void nmi_panic(struct pt_regs *regs, const char *msg);
 17void check_panic_on_warn(const char *origin);
 18extern void oops_enter(void);
 19extern void oops_exit(void);
 20extern bool oops_may_print(void);
 21
 22extern bool panic_triggering_all_cpu_backtrace;
 23extern int panic_timeout;
 24extern unsigned long panic_print;
 25extern int panic_on_oops;
 26extern int panic_on_warn;
 27
 28extern unsigned long panic_on_taint;
 29extern bool panic_on_taint_nousertaint;
 30
 31extern int sysctl_panic_on_stackoverflow;
 32
 33extern bool crash_kexec_post_notifiers;
 34
 35extern void __stack_chk_fail(void);
 36void abort(void);
 37
 38/*
 39 * panic_cpu is used for synchronizing panic() and crash_kexec() execution. It
 40 * holds a CPU number which is executing panic() currently. A value of
 41 * PANIC_CPU_INVALID means no CPU has entered panic() or crash_kexec().
 42 */
 43extern atomic_t panic_cpu;
 44#define PANIC_CPU_INVALID	-1
 45
 46bool panic_try_start(void);
 47void panic_reset(void);
 48bool panic_in_progress(void);
 49bool panic_on_this_cpu(void);
 50bool panic_on_other_cpu(void);
 51
 52/*
 53 * Only to be used by arch init code. If the user over-wrote the default
 54 * CONFIG_PANIC_TIMEOUT, honor it.
 55 */
 56static inline void set_arch_panic_timeout(int timeout, int arch_default_timeout)
 57{
 58	if (panic_timeout == arch_default_timeout)
 59		panic_timeout = timeout;
 60}
 61
 62/* This cannot be an enum because some may be used in assembly source. */
 63#define TAINT_PROPRIETARY_MODULE	0
 64#define TAINT_FORCED_MODULE		1
 65#define TAINT_CPU_OUT_OF_SPEC		2
 66#define TAINT_FORCED_RMMOD		3
 67#define TAINT_MACHINE_CHECK		4
 68#define TAINT_BAD_PAGE			5
 69#define TAINT_USER			6
 70#define TAINT_DIE			7
 71#define TAINT_OVERRIDDEN_ACPI_TABLE	8
 72#define TAINT_WARN			9
 73#define TAINT_CRAP			10
 74#define TAINT_FIRMWARE_WORKAROUND	11
 75#define TAINT_OOT_MODULE		12
 76#define TAINT_UNSIGNED_MODULE		13
 77#define TAINT_SOFTLOCKUP		14
 78#define TAINT_LIVEPATCH			15
 79#define TAINT_AUX			16
 80#define TAINT_RANDSTRUCT		17
 81#define TAINT_TEST			18
 82#define TAINT_FWCTL			19
 83#define TAINT_FLAGS_COUNT		20
 84#define TAINT_FLAGS_MAX			((1UL << TAINT_FLAGS_COUNT) - 1)
 85
 86struct taint_flag {
 87	char c_true;		/* character printed when tainted */
 88	char c_false;		/* character printed when not tainted */
 89	const char *desc;	/* verbose description of the set taint flag */
 90};
 91
 92extern const struct taint_flag taint_flags[TAINT_FLAGS_COUNT];
 93
 94enum lockdep_ok {
 95	LOCKDEP_STILL_OK,
 96	LOCKDEP_NOW_UNRELIABLE,
 97};
 98
 99extern const char *print_tainted(void);
100extern const char *print_tainted_verbose(void);
101extern void add_taint(unsigned flag, enum lockdep_ok);
102extern int test_taint(unsigned flag);
103extern unsigned long get_taint(void);
104
105#endif	/* _LINUX_PANIC_H */