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