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