panic.h (2610B)
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 18extern int panic_timeout; 19extern unsigned long panic_print; 20extern int panic_on_oops; 21extern int panic_on_unrecovered_nmi; 22extern int panic_on_io_nmi; 23extern int panic_on_warn; 24 25extern unsigned long panic_on_taint; 26extern bool panic_on_taint_nousertaint; 27 28extern int sysctl_panic_on_rcu_stall; 29extern int sysctl_max_rcu_stall_to_panic; 30extern int sysctl_panic_on_stackoverflow; 31 32extern bool crash_kexec_post_notifiers; 33 34/* 35 * panic_cpu is used for synchronizing panic() and crash_kexec() execution. It 36 * holds a CPU number which is executing panic() currently. A value of 37 * PANIC_CPU_INVALID means no CPU has entered panic() or crash_kexec(). 38 */ 39extern atomic_t panic_cpu; 40#define PANIC_CPU_INVALID -1 41 42/* 43 * Only to be used by arch init code. If the user over-wrote the default 44 * CONFIG_PANIC_TIMEOUT, honor it. 45 */ 46static inline void set_arch_panic_timeout(int timeout, int arch_default_timeout) 47{ 48 if (panic_timeout == arch_default_timeout) 49 panic_timeout = timeout; 50} 51 52/* This cannot be an enum because some may be used in assembly source. */ 53#define TAINT_PROPRIETARY_MODULE 0 54#define TAINT_FORCED_MODULE 1 55#define TAINT_CPU_OUT_OF_SPEC 2 56#define TAINT_FORCED_RMMOD 3 57#define TAINT_MACHINE_CHECK 4 58#define TAINT_BAD_PAGE 5 59#define TAINT_USER 6 60#define TAINT_DIE 7 61#define TAINT_OVERRIDDEN_ACPI_TABLE 8 62#define TAINT_WARN 9 63#define TAINT_CRAP 10 64#define TAINT_FIRMWARE_WORKAROUND 11 65#define TAINT_OOT_MODULE 12 66#define TAINT_UNSIGNED_MODULE 13 67#define TAINT_SOFTLOCKUP 14 68#define TAINT_LIVEPATCH 15 69#define TAINT_AUX 16 70#define TAINT_RANDSTRUCT 17 71#define TAINT_FLAGS_COUNT 18 72#define TAINT_FLAGS_MAX ((1UL << TAINT_FLAGS_COUNT) - 1) 73 74struct taint_flag { 75 char c_true; /* character printed when tainted */ 76 char c_false; /* character printed when not tainted */ 77 bool module; /* also show as a per-module taint flag */ 78}; 79 80extern const struct taint_flag taint_flags[TAINT_FLAGS_COUNT]; 81 82enum lockdep_ok { 83 LOCKDEP_STILL_OK, 84 LOCKDEP_NOW_UNRELIABLE, 85}; 86 87extern const char *print_tainted(void); 88extern void add_taint(unsigned flag, enum lockdep_ok); 89extern int test_taint(unsigned flag); 90extern unsigned long get_taint(void); 91 92#endif /* _LINUX_PANIC_H */