kern_shutdown.c File Reference

#include <sys/cdefs.h>
#include "opt_ddb.h"
#include "opt_kdb.h"
#include "opt_panic.h"
#include "opt_sched.h"
#include "opt_watchdog.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bio.h>
#include <sys/buf.h>
#include <sys/conf.h>
#include <sys/cons.h>
#include <sys/eventhandler.h>
#include <sys/jail.h>
#include <sys/kdb.h>
#include <sys/kernel.h>
#include <sys/kerneldump.h>
#include <sys/kthread.h>
#include <sys/malloc.h>
#include <sys/mount.h>
#include <sys/priv.h>
#include <sys/proc.h>
#include <sys/reboot.h>
#include <sys/resourcevar.h>
#include <sys/sched.h>
#include <sys/smp.h>
#include <sys/sysctl.h>
#include <sys/sysproto.h>
#include <sys/vnode.h>
#include <sys/watchdog.h>
#include <ddb/ddb.h>
#include <machine/cpu.h>
#include <machine/pcb.h>
#include <machine/smp.h>
#include <security/mac/mac_framework.h>
#include <vm/vm.h>
#include <vm/vm_object.h>
#include <vm/vm_page.h>
#include <vm/vm_pager.h>
#include <vm/swap_pager.h>
#include <sys/signalvar.h>
#include <machine/stdarg.h>

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Macros
#define	PANIC_REBOOT_WAIT_TIME   15 /* default to 15 seconds */
#define	POWEROFF_DELAY   5000

Functions
	__FBSDID ("$BSDSUniX$")
	SYSCTL_INT (_kern, OID_AUTO, panic_reboot_wait_time, CTLFLAG_RW|CTLFLAG_TUN,&panic_reboot_wait_time, 0,"Seconds to wait before rebooting after a panic")
	TUNABLE_INT ("kern.panic_reboot_wait_time",&panic_reboot_wait_time)
	SYSCTL_INT (_kern, OID_AUTO, sync_on_panic, CTLFLAG_RW|CTLFLAG_TUN,&sync_on_panic, 0,"Do a sync before rebooting from a panic")
	TUNABLE_INT ("kern.sync_on_panic",&sync_on_panic)
	SYSCTL_INT (_kern, OID_AUTO, stop_scheduler_on_panic, CTLFLAG_RW|CTLFLAG_TUN,&stop_scheduler_on_panic, 0,"stop scheduler upon entering panic")
	TUNABLE_INT ("kern.stop_scheduler_on_panic",&stop_scheduler_on_panic)
static	SYSCTL_NODE (_kern, OID_AUTO, shutdown, CTLFLAG_RW, 0,"Shutdown environment")
	SYSCTL_INT (_kern_shutdown, OID_AUTO, show_busybufs, CTLFLAG_RW,&show_busybufs, 0,"")
static void	poweroff_wait (void *, int)
static void	shutdown_halt (void *junk, int howto)
static void	shutdown_panic (void *junk, int howto)
static void	shutdown_reset (void *junk, int howto)
static void	shutdown_conf (void *unused)
	SYSINIT (shutdown_conf, SI_SUB_INTRINSIC, SI_ORDER_ANY, shutdown_conf, NULL)
int	sys_reboot (struct thread *td, struct reboot_args *uap)
void	shutdown_nice (int howto)
static void	print_uptime (void)
int	doadump (boolean_t textdump)
static int	isbufbusy (struct buf *bp)
void	kern_reboot (int howto)
void	panic (const char *fmt,...)
	SYSCTL_INT (_kern_shutdown, OID_AUTO, poweroff_delay, CTLFLAG_RW,&poweroff_delay, 0,"")
	SYSCTL_INT (_kern_shutdown, OID_AUTO, kproc_shutdown_wait, CTLFLAG_RW,&kproc_shutdown_wait, 0,"")
void	kproc_shutdown (void *arg, int howto)
void	kthread_shutdown (void *arg, int howto)
int	set_dumper (struct dumperinfo *di)
int	dump_write (struct dumperinfo *di, void *virtual, vm_offset_t physical, off_t offset, size_t length)
void	mkdumpheader (struct kerneldumpheader *kdh, char *magic, uint32_t archver, uint64_t dumplen, uint32_t blksz)

Variables
static int	panic_reboot_wait_time = PANIC_REBOOT_WAIT_TIME
static int	sync_on_panic = 0
static int	stop_scheduler_on_panic = 1
static int	show_busybufs
const char *	panicstr
int	dumping
int	rebooting
static struct dumperinfo	dumper
static struct pcb	dumppcb
lwpid_t	dumptid
static int	shutdown_howto = 0
static int	waittime = -1
static int	poweroff_delay = POWEROFF_DELAY
static int	kproc_shutdown_wait = 60

Macro Definition Documentation

#define PANIC_REBOOT_WAIT_TIME   15 /* default to 15 seconds */

Definition at line 88 of file kern_shutdown.c.

#define POWEROFF_DELAY   5000

Definition at line 653 of file kern_shutdown.c.

Function Documentation

__FBSDID

(

"$BSDSUniX$"

)

int doadump

(

boolean_t

textdump

)

Definition at line 256 of file kern_shutdown.c.

References coredump(), dumper, dumping, dumppcb, and dumptid.

Referenced by kern_reboot().

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int dump_write	(	struct dumperinfo *	di,
		void *	virtual,
		vm_offset_t	physical,
		off_t	offset,
		size_t	length
	)

Definition at line 737 of file kern_shutdown.c.

References printf().

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static int isbufbusy ( struct buf *  bp )

static

Definition at line 284 of file kern_shutdown.c.

Referenced by kern_reboot().

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void kern_reboot

(

int

howto

)

Definition at line 297 of file kern_shutdown.c.

References buf, cngrab(), doadump(), dumping, isbufbusy(), kdb_active, mi_switch(), mountlist, nbuf, panicstr, print_uptime(), printf(), rebooting, sched_bind(), show_busybufs, shutdown_howto, sys_sync(), vfs_unmountall(), vn_printf(), and waittime.

Referenced by panic(), shutdown_nice(), sys_reboot(), and vfs_mountroot_parse().

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void kproc_shutdown	(	void *	arg,
		int	howto
	)

Definition at line 681 of file kern_shutdown.c.

References hz, kproc_shutdown_wait, kproc_suspend(), panicstr, and printf().

Referenced by buf_daemon(), syncer_shutdown(), and vnlru_proc().

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void kthread_shutdown	(	void *	arg,
		int	howto
	)

Definition at line 701 of file kern_shutdown.c.

References hz, kproc_shutdown_wait, kthread_suspend(), panicstr, and printf().

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void mkdumpheader	(	struct kerneldumpheader *	kdh,
		char *	magic,
		uint32_t	archver,
		uint64_t	dumplen,
		uint32_t	blksz
	)

Definition at line 753 of file kern_shutdown.c.

References panicstr, prison0, and time_second.

void panic	(	const char *	fmt,
			...
	)

Definition at line 557 of file kern_shutdown.c.

References all_cpus, buf, cngrab(), critical_enter(), critical_exit(), kdb_active, kdb_backtrace(), kdb_enter(), kern_reboot(), panicstr, printf(), stop_scheduler_on_panic, sync_on_panic, vprintf(), and vsnprintf().

Referenced by __lockmgr_args(), __stack_chk_fail(), _bus_dmamap_load_ccb(), _callout_stop_safe(), _fdrop(), _mtx_lock_spin_failed(), _rw_downgrade(), _sx_downgrade(), acl_posix1e_acl_to_mode(), aio_daemon(), aio_proc_rundown(), aio_swake_cb(), allocbuf(), assert_lockmgr(), blst_leaf_free(), blst_meta_alloc(), blst_meta_fill(), blst_meta_free(), bp_unmapped_get_kva(), bqrelse(), brelse(), brelvp(), bufbdflush(), bufdone_finish(), bufobj_invalbuf(), bus_set_pass(), busdma_bufalloc_alloc_uncacheable(), busdma_bufalloc_findzone(), calc_remaining(), clone_create(), cluster_rbuild(), cluster_wbuild_gb(), config_intrhook_disestablish(), copyinfrom(), copyinstrfrom(), core_output(), cpu_initclocks_bsp(), cpuset_init(), create_init(), devclass_delete_device(), device_busy(), device_probe_child(), device_unbusy(), domain_init(), enroll(), exec_unregister(), exit1(), fail_point_eval_nontrivial(), filt_mqdetach(), filt_usertouch(), free(), getblk(), getnewbuf_reuse_bp(), idle_setup(), intr_event_describe_handler(), intr_event_remove_handler(), ithread_create(), itimers_event_hook_exit(), itismychild(), kdb_panic(), kdb_switch(), kdb_sysctl_panic(), kern_getsockopt(), kern_mknodat(), kern_msgctl(), kern_msgrcv(), kern_msgsnd(), kern_posix_fallocate(), kern_setsockopt(), kobj_class_compile(), kproc_create(), kproc_start(), kthread_add(), kthread_start(), kthread_suspend_check(), lf_clearlock(), lf_findoverlap(), link_elf_init(), link_elf_link_preload(), link_elf_load_file(), link_elf_reloc_local(), linker_preload(), lock_lockmgr(), lock_rm(), lock_spin(), lookup(), m_pulldown(), make_dev_alias_v(), make_dev_credv(), malloc_init(), mb_ctor_clust(), mb_reserve(), modlist_newmodule(), module_register_init(), module_release(), mqfs_allocv(), mqfs_create(), mqfs_readdir(), msg_freehdr(), msginit(), null_fetch_syscall_args(), null_set_syscall_retval(), proc_fini(), propagate_priority(), reassignbuf(), relocate_file(), relookup(), resource_list_add(), resource_list_delete(), resource_list_free(), resource_list_release(), resource_list_reserve(), resource_list_unreserve(), rman_adjust_resource(), rman_init(), root_setup_intr(), sbappendaddr_locked(), sbappendcontrol_locked(), sbdrop_internal(), sbflush_internal(), sbsndptr(), selrecord(), semexit_myhook(), set_rootvnode(), setrunnable(), sleepq_catch_signals(), sleepq_switch(), softclock_call_cc(), soopt_mcopyin(), soupcall_clear(), soupcall_set(), start_init(), start_softclock(), start_softintr(), sys_semop(), sysctl_ctx_free(), sysctl_register_oid(), sysinit_add(), tdsendsignal(), thread_dtor(), thread_exit(), timeout(), ttydevsw_deffree(), ttydevsw_defoutwakeup(), uipc_attach(), uipc_rcvd(), uipc_send(), umtx_pi_setowner(), unlock_lockmgr(), unlock_spin(), unp_connect2(), unp_init(), unp_pcblist(), ureadc(), vdropl(), vfs_allocate_syncvnode(), vfs_domount_first(), vfs_mount_destroy(), vfs_mountroot_parse(), vfs_unbusy_pages(), vget(), vgonel(), vn_finished_secondary_write(), vn_finished_write(), vop_panic(), vop_stdfsync(), vputx(), witness_assert(), witness_checkorder(), witness_destroy(), witness_downgrade(), witness_init(), witness_restore(), witness_save(), witness_setflag(), witness_thread_exit(), witness_unlock(), witness_upgrade(), and witness_warn().

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static void poweroff_wait ( void *  junk, int  howto  )

static

Definition at line 661 of file kern_shutdown.c.

References poweroff_delay.

Referenced by shutdown_conf().

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static void print_uptime ( void  )

static

Definition at line 229 of file kern_shutdown.c.

References getnanouptime(), and printf().

Referenced by kern_reboot().

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int set_dumper

(

struct dumperinfo *

di

)

Definition at line 722 of file kern_shutdown.c.

References dumper.

static void shutdown_conf ( void *  unused )

static

Definition at line 166 of file kern_shutdown.c.

References poweroff_wait(), shutdown_halt(), shutdown_panic(), and shutdown_reset().

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static void shutdown_halt ( void *  junk, int  howto  )

static

Definition at line 467 of file kern_shutdown.c.

References cngetc(), and printf().

Referenced by shutdown_conf().

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void shutdown_nice

(

int

howto

)

Definition at line 210 of file kern_shutdown.c.

References initproc, kern_psignal(), kern_reboot(), and shutdown_howto.

Referenced by kdb_reboot().

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static void shutdown_panic ( void *  junk, int  howto  )

static

Definition at line 490 of file kern_shutdown.c.

References cncheckc(), cngetc(), panic_reboot_wait_time, and printf().

Referenced by shutdown_conf().

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static void shutdown_reset ( void *  junk, int  howto  )

static

Definition at line 523 of file kern_shutdown.c.

References printf().

Referenced by shutdown_conf().

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int sys_reboot	(	struct thread *	td,
		struct reboot_args *	uap
	)

Definition at line 186 of file kern_shutdown.c.

References Giant, kern_reboot(), and priv_check().

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SYSCTL_INT	(	_kern	,
		OID_AUTO	,
		panic_reboot_wait_time	,
		CTLFLAG_RW|	CTLFLAG_TUN,
		&	panic_reboot_wait_time,
		0	,
		"Seconds to wait before rebooting after a panic"
	)

SYSCTL_INT	(	_kern	,
		OID_AUTO	,
		sync_on_panic	,
		CTLFLAG_RW|	CTLFLAG_TUN,
		&	sync_on_panic,
		0	,
		"Do a sync before rebooting from a panic"
	)

SYSCTL_INT	(	_kern	,
		OID_AUTO	,
		stop_scheduler_on_panic	,
		CTLFLAG_RW|	CTLFLAG_TUN,
		&	stop_scheduler_on_panic,
		0	,
		"stop scheduler upon entering panic"
	)

SYSCTL_INT	(	_kern_shutdown	,
		OID_AUTO	,
		show_busybufs	,
		CTLFLAG_RW	,
		&	show_busybufs,
		0	,
		""
	)

SYSCTL_INT	(	_kern_shutdown	,
		OID_AUTO	,
		poweroff_delay	,
		CTLFLAG_RW	,
		&	poweroff_delay,
		0	,
		""
	)

SYSCTL_INT	(	_kern_shutdown	,
		OID_AUTO	,
		kproc_shutdown_wait	,
		CTLFLAG_RW	,
		&	kproc_shutdown_wait,
		0	,
		""
	)

static SYSCTL_NODE ( _kern  , OID_AUTO  , shutdown  , CTLFLAG_RW  , 0  , "Shutdown environment"    )

static

SYSINIT	(	shutdown_conf	,
		SI_SUB_INTRINSIC	,
		SI_ORDER_ANY	,
		shutdown_conf	,
		NULL
	)

TUNABLE_INT	(	"kern.panic_reboot_wait_time"	,
		&	panic_reboot_wait_time
	)

TUNABLE_INT	(	"kern.sync_on_panic"	,
		&	sync_on_panic
	)

TUNABLE_INT	(	"kern.stop_scheduler_on_panic"	,
		&	stop_scheduler_on_panic
	)

Variable Documentation

struct dumperinfo dumper

static

Definition at line 153 of file kern_shutdown.c.

Referenced by doadump(), and set_dumper().

int dumping

Definition at line 151 of file kern_shutdown.c.

Referenced by doadump(), and kern_reboot().

struct pcb dumppcb

static

Definition at line 156 of file kern_shutdown.c.

Referenced by doadump().

lwpid_t dumptid

Definition at line 157 of file kern_shutdown.c.

Referenced by doadump().

int kproc_shutdown_wait = 60

static

Definition at line 676 of file kern_shutdown.c.

Referenced by kproc_shutdown(), and kthread_shutdown().

int panic_reboot_wait_time = PANIC_REBOOT_WAIT_TIME

static

Definition at line 90 of file kern_shutdown.c.

Referenced by shutdown_panic().

const char* panicstr

Definition at line 149 of file kern_shutdown.c.

Referenced by __lockmgr_args(), _cv_timedwait(), _cv_timedwait_sig(), _cv_wait(), _cv_wait_sig(), _cv_wait_unlock(), _thread_lock_flags(), choosethread(), enroll(), kern_reboot(), kproc_shutdown(), kthread_shutdown(), ktr_tracepoint(), maybe_preempt(), mi_switch(), mkdumpheader(), panic(), putbuf(), putchar(), sched_setpreempt(), vop_strategy_pre(), vprintf(), witness_assert(), witness_checkorder(), witness_defineorder(), witness_downgrade(), witness_init(), witness_lock(), witness_restore(), witness_save(), witness_setflag(), witness_thread_exit(), witness_unlock(), witness_upgrade(), and witness_warn().

int poweroff_delay = POWEROFF_DELAY

static

Definition at line 655 of file kern_shutdown.c.

Referenced by poweroff_wait().

int rebooting

Definition at line 152 of file kern_shutdown.c.

Referenced by exit1(), and kern_reboot().

int show_busybufs

static

Definition at line 138 of file kern_shutdown.c.

Referenced by kern_reboot().

int shutdown_howto = 0

static

Definition at line 207 of file kern_shutdown.c.

Referenced by kern_reboot(), and shutdown_nice().

int stop_scheduler_on_panic = 1

static

Definition at line 129 of file kern_shutdown.c.

Referenced by panic().

int sync_on_panic = 0

static

Definition at line 124 of file kern_shutdown.c.

Referenced by panic().

int waittime = -1

static

Definition at line 226 of file kern_shutdown.c.

Referenced by __lockmgr_args(), _mtx_lock_sleep(), _mtx_trylock(), _rw_rlock(), _rw_wlock_hard(), _sx_slock_hard(), _sx_xlock_hard(), and kern_reboot().