#include <sys/cdefs.h>
#include "opt_ntp.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/sysproto.h>
#include <sys/eventhandler.h>
#include <sys/kernel.h>
#include <sys/priv.h>
#include <sys/proc.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/time.h>
#include <sys/timex.h>
#include <sys/timetc.h>
#include <sys/timepps.h>
#include <sys/syscallsubr.h>
#include <sys/sysctl.h>

Include dependency graph for kern_ntptime.c:

Data Structures
struct	ntp_gettime_args

struct	ntp_adjtime_args

struct	adjtime_args

Macros
#define	L_ADD(v, u) ((v) += (u))

#define	L_SUB(v, u) ((v) -= (u))

#define	L_ADDHI(v, a) ((v) += (int64_t)(a) << 32)

#define	L_NEG(v) ((v) = -(v))

#define	L_RSHIFT(v, n)

#define	L_MPY(v, a) ((v) *= (a))

#define	L_CLR(v) ((v) = 0)

#define	L_ISNEG(v) ((v) < 0)

#define	L_LINT(v, a) ((v) = (int64_t)(a) << 32)

#define	L_GINT(v) ((v) < 0 ? -(-(v) >> 32) : (v) >> 32)

#define	SHIFT_PLL 4 /* PLL loop gain (shift) */

#define	SHIFT_FLL 2 /* FLL loop gain (shift) */

#define	NTP_LOCK() mtx_lock_spin(&ntp_lock)

#define	NTP_UNLOCK() mtx_unlock_spin(&ntp_lock)

#define	NTP_ASSERT_LOCKED() mtx_assert(&ntp_lock, MA_OWNED)

Typedefs
typedef int64_t	l_fp

Functions
	__FBSDID ("$FreeBSD$")

	MTX_SYSINIT (ntp, &ntp_lock, "ntp", MTX_SPIN)

static void	hardupdate (long offset)

static void	ntp_gettime1 (struct ntptimeval *ntvp)

static bool	ntp_is_time_error (int tsl)

int	sys_ntp_gettime (struct thread td, struct ntp_gettime_args uap)

static int	ntp_sysctl (SYSCTL_HANDLER_ARGS)

	SYSCTL_NODE (_kern, OID_AUTO, ntp_pll, CTLFLAG_RW\|CTLFLAG_MPSAFE, 0, "")

	SYSCTL_PROC (_kern_ntp_pll, OID_AUTO, gettime, CTLTYPE_OPAQUE\|CTLFLAG_RD\|CTLFLAG_MPSAFE, 0, sizeof(struct ntptimeval), ntp_sysctl, "S,ntptimeval", "")

int	kern_ntp_adjtime (struct thread td, struct timex ntv, int *retvalp)

int	sys_ntp_adjtime (struct thread td, struct ntp_adjtime_args uap)

void	ntp_update_second (int64_t adjustment, time_t newsec)

int	sys_adjtime (struct thread td, struct adjtime_args uap)

int	kern_adjtime (struct thread td, struct timeval delta, struct timeval *olddelta)

static void	periodic_resettodr (void *arg __unused)

static void	shutdown_resettodr (void *arg __unused, int howto __unused)

static int	sysctl_resettodr_period (SYSCTL_HANDLER_ARGS)

	SYSCTL_PROC (_machdep, OID_AUTO, rtc_save_period, CTLTYPE_INT\|CTLFLAG_RWTUN\|CTLFLAG_MPSAFE, &resettodr_period, 1800, sysctl_resettodr_period, "I", "Save system time to RTC with this period (in seconds)")

static void	start_periodic_resettodr (void *arg __unused)

	SYSINIT (periodic_resettodr, SI_SUB_LAST, SI_ORDER_MIDDLE, start_periodic_resettodr, NULL)

Variables
static int	time_state = TIME_OK

int	time_status = STA_UNSYNC

static long	time_tai

static long	time_monitor

static long	time_constant

static long	time_precision = 1

static long	time_maxerror = MAXPHASE / 1000

long	time_esterror = MAXPHASE / 1000

static long	time_reftime

static l_fp	time_offset

static l_fp	time_freq

static l_fp	time_adj

static int64_t	time_adjtime

static struct mtx	ntp_lock

static struct callout	resettodr_callout

static int	resettodr_period = 1800

Macro Definition Documentation

◆ L_ADD

#define L_ADD	(	v,
		u
	)	((v) += (u))

Definition at line 62 of file kern_ntptime.c.

◆ L_ADDHI

#define L_ADDHI	(	v,
		a
	)	((v) += (int64_t)(a) << 32)

Definition at line 64 of file kern_ntptime.c.

◆ L_CLR

#define L_CLR ( v ) ((v) = 0)

Definition at line 74 of file kern_ntptime.c.

◆ L_GINT

#define L_GINT ( v ) ((v) < 0 ? -(-(v) >> 32) : (v) >> 32)

Definition at line 77 of file kern_ntptime.c.

◆ L_ISNEG

#define L_ISNEG ( v ) ((v) < 0)

Definition at line 75 of file kern_ntptime.c.

◆ L_LINT

#define L_LINT	(	v,
		a
	)	((v) = (int64_t)(a) << 32)

Definition at line 76 of file kern_ntptime.c.

◆ L_MPY

#define L_MPY	(	v,
		a
	)	((v) *= (a))

Definition at line 73 of file kern_ntptime.c.

◆ L_NEG

#define L_NEG ( v ) ((v) = -(v))

Definition at line 65 of file kern_ntptime.c.

◆ L_RSHIFT

#define L_RSHIFT	(	v,
		n
	)

Value:

        do { \
                if ((v) < 0) \
                        (v) = -(-(v) >> (n)); \
                else \
                        (v) = (v) >> (n); \
        } while (0)

Definition at line 66 of file kern_ntptime.c.

◆ L_SUB

#define L_SUB	(	v,
		u
	)	((v) -= (u))

Definition at line 63 of file kern_ntptime.c.

◆ NTP_ASSERT_LOCKED

#define NTP_ASSERT_LOCKED ( ) mtx_assert(&ntp_lock, MA_OWNED)

Definition at line 170 of file kern_ntptime.c.

◆ NTP_LOCK

#define NTP_LOCK ( ) mtx_lock_spin(&ntp_lock)

Definition at line 168 of file kern_ntptime.c.

◆ NTP_UNLOCK

#define NTP_UNLOCK ( ) mtx_unlock_spin(&ntp_lock)

Definition at line 169 of file kern_ntptime.c.

◆ SHIFT_FLL

#define SHIFT_FLL 2 /* FLL loop gain (shift) */

Definition at line 148 of file kern_ntptime.c.

◆ SHIFT_PLL

#define SHIFT_PLL 4 /* PLL loop gain (shift) */

Definition at line 147 of file kern_ntptime.c.

Typedef Documentation

◆ l_fp

typedef int64_t l_fp

Definition at line 61 of file kern_ntptime.c.

Function Documentation

◆ __FBSDID()

__FBSDID ( "$FreeBSD$" )

◆ hardupdate()

static void hardupdate ( long offset )

static

Definition at line 656 of file kern_ntptime.c.

References L_ADD, L_GINT, L_LINT, L_MPY, L_RSHIFT, NTP_ASSERT_LOCKED, SHIFT_FLL, SHIFT_PLL, time_constant, time_freq, time_monitor, time_offset, time_reftime, time_status, and time_uptime.

Referenced by kern_ntp_adjtime().

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◆ kern_adjtime()

int kern_adjtime	(	struct thread *	td,
		struct timeval *	delta,
		struct timeval *	olddelta
	)

Definition at line 960 of file kern_ntptime.c.

References NTP_LOCK, NTP_UNLOCK, priv_check(), and time_adjtime.

Referenced by sys_adjtime().

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◆ kern_ntp_adjtime()

int kern_ntp_adjtime	(	struct thread *	td,
		struct timex *	ntv,
		int *	retvalp
	)

Definition at line 341 of file kern_ntptime.c.

References hardupdate(), L_GINT, L_LINT, ntp_is_time_error(), NTP_LOCK, NTP_UNLOCK, priv_check(), time_constant, time_esterror, time_freq, time_maxerror, time_offset, time_precision, time_state, time_status, and time_tai.

Referenced by sys_ntp_adjtime().

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◆ MTX_SYSINIT()

MTX_SYSINIT	(	ntp	,
		&	ntp_lock,
		"ntp"	,
		MTX_SPIN
	)

◆ ntp_gettime1()

static void ntp_gettime1 ( struct ntptimeval * ntvp )

static

Definition at line 252 of file kern_ntptime.c.

References nanotime(), NTP_ASSERT_LOCKED, ntp_is_time_error(), time_esterror, time_maxerror, time_state, time_status, and time_tai.

Referenced by ntp_sysctl(), and sys_ntp_gettime().

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◆ ntp_is_time_error()

static bool ntp_is_time_error ( int tsl )

static

Definition at line 215 of file kern_ntptime.c.

Referenced by kern_ntp_adjtime(), ntp_gettime1(), periodic_resettodr(), and shutdown_resettodr().

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◆ ntp_sysctl()

static int ntp_sysctl ( SYSCTL_HANDLER_ARGS )

static

Definition at line 298 of file kern_ntptime.c.

References ntp_gettime1(), NTP_LOCK, NTP_UNLOCK, and sysctl_handle_opaque().

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◆ ntp_update_second()

void ntp_update_second	(	int64_t *	adjustment,
		time_t *	newsec
	)

Definition at line 503 of file kern_ntptime.c.

References L_ADD, L_LINT, L_RSHIFT, L_SUB, NTP_LOCK, NTP_UNLOCK, SHIFT_PLL, time_adj, time_adjtime, time_constant, time_freq, time_maxerror, time_offset, time_state, time_status, and time_tai.

Referenced by tc_windup().

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◆ periodic_resettodr()

static void periodic_resettodr ( void *arg __unused )

static

Definition at line 993 of file kern_ntptime.c.

References callout_schedule(), hz, ntp_is_time_error(), resettodr(), resettodr_callout, resettodr_period, and time_status.

Referenced by start_periodic_resettodr(), and sysctl_resettodr_period().

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◆ shutdown_resettodr()

static void shutdown_resettodr	(	void *arg	__unused,
		int howto	__unused
	)

static

Definition at line 1007 of file kern_ntptime.c.

References ntp_is_time_error(), resettodr(), resettodr_callout, resettodr_period, and time_status.

Referenced by start_periodic_resettodr().

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◆ start_periodic_resettodr()

static void start_periodic_resettodr ( void *arg __unused )

static

Definition at line 1040 of file kern_ntptime.c.

References callout_init(), hz, periodic_resettodr(), resettodr_callout, resettodr_period, and shutdown_resettodr().

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◆ sys_adjtime()

int sys_adjtime	(	struct thread *	td,
		struct adjtime_args *	uap
	)

Definition at line 941 of file kern_ntptime.c.

References adjtime_args::delta, kern_adjtime(), and adjtime_args::olddelta.

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◆ sys_ntp_adjtime()

int sys_ntp_adjtime	(	struct thread *	td,
		struct ntp_adjtime_args *	uap
	)

Definition at line 477 of file kern_ntptime.c.

References kern_ntp_adjtime(), and ntp_adjtime_args::tp.

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◆ sys_ntp_gettime()

int sys_ntp_gettime	(	struct thread *	td,
		struct ntp_gettime_args *	uap
	)

Definition at line 283 of file kern_ntptime.c.

References ntp_gettime1(), NTP_LOCK, NTP_UNLOCK, and ntp_gettime_args::ntvp.

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◆ SYSCTL_NODE()

SYSCTL_NODE	(	_kern	,
		OID_AUTO	,
		ntp_pll	,
		CTLFLAG_RW\|	CTLFLAG_MPSAFE,
		0	,
		""
	)

◆ SYSCTL_PROC() [1/2]

SYSCTL_PROC	(	_kern_ntp_pll	,
		OID_AUTO	,
		gettime	,
		CTLTYPE_OPAQUE\|CTLFLAG_RD\|	CTLFLAG_MPSAFE,
		0	,
		sizeof(struct ntptimeval)	,
		ntp_sysctl	,
		"	S,
		ntptimeval"	,
		""
	)

◆ SYSCTL_PROC() [2/2]

SYSCTL_PROC	(	_machdep	,
		OID_AUTO	,
		rtc_save_period	,
		CTLTYPE_INT\|CTLFLAG_RWTUN\|	CTLFLAG_MPSAFE,
		&	resettodr_period,
		1800	,
		sysctl_resettodr_period	,
		"I"	,
		"Save system time to RTC with this period (in seconds)"
	)

◆ sysctl_resettodr_period()

static int sysctl_resettodr_period ( SYSCTL_HANDLER_ARGS )

static

Definition at line 1017 of file kern_ntptime.c.

References hz, periodic_resettodr(), resettodr_callout, resettodr_period, and sysctl_handle_int().

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◆ SYSINIT()

SYSINIT	(	periodic_resettodr	,
		SI_SUB_LAST	,
		SI_ORDER_MIDDLE	,
		start_periodic_resettodr	,
		NULL
	)

Variable Documentation

◆ ntp_lock

struct mtx ntp_lock

static

Definition at line 165 of file kern_ntptime.c.

◆ resettodr_callout

struct callout resettodr_callout

static

Definition at line 989 of file kern_ntptime.c.

Referenced by periodic_resettodr(), shutdown_resettodr(), start_periodic_resettodr(), and sysctl_resettodr_period().

◆ resettodr_period

int resettodr_period = 1800

static

Definition at line 990 of file kern_ntptime.c.

Referenced by periodic_resettodr(), shutdown_resettodr(), start_periodic_resettodr(), and sysctl_resettodr_period().

◆ time_adj

l_fp time_adj

static

Definition at line 161 of file kern_ntptime.c.

Referenced by ntp_update_second().

◆ time_adjtime

int64_t time_adjtime

static

Definition at line 163 of file kern_ntptime.c.

Referenced by kern_adjtime(), and ntp_update_second().

◆ time_constant

long time_constant

static

Definition at line 154 of file kern_ntptime.c.

Referenced by hardupdate(), kern_ntp_adjtime(), and ntp_update_second().

◆ time_esterror

long time_esterror = MAXPHASE / 1000

Definition at line 157 of file kern_ntptime.c.

Referenced by kern_ntp_adjtime(), ntp_gettime1(), and sysclock_getsnapshot().

◆ time_freq

l_fp time_freq

static

Definition at line 160 of file kern_ntptime.c.

Referenced by hardupdate(), kern_ntp_adjtime(), and ntp_update_second().

◆ time_maxerror

long time_maxerror = MAXPHASE / 1000

static

Definition at line 156 of file kern_ntptime.c.

Referenced by kern_ntp_adjtime(), ntp_gettime1(), and ntp_update_second().

◆ time_monitor

long time_monitor

static

Definition at line 153 of file kern_ntptime.c.

Referenced by hardupdate().

◆ time_offset

l_fp time_offset

static

Definition at line 159 of file kern_ntptime.c.

Referenced by hardupdate(), kern_ntp_adjtime(), and ntp_update_second().

◆ time_precision

long time_precision = 1

static

Definition at line 155 of file kern_ntptime.c.

Referenced by kern_ntp_adjtime().

◆ time_reftime

long time_reftime

static

Definition at line 158 of file kern_ntptime.c.

Referenced by hardupdate().

◆ time_state

int time_state = TIME_OK

static

Definition at line 150 of file kern_ntptime.c.

Referenced by kern_ntp_adjtime(), ntp_gettime1(), and ntp_update_second().

◆ time_status

int time_status = STA_UNSYNC

Definition at line 151 of file kern_ntptime.c.

Referenced by hardupdate(), kern_ntp_adjtime(), ntp_gettime1(), ntp_update_second(), periodic_resettodr(), shutdown_resettodr(), and sysclock_getsnapshot().

◆ time_tai

long time_tai

static

Definition at line 152 of file kern_ntptime.c.

Referenced by kern_ntp_adjtime(), ntp_gettime1(), and ntp_update_second().

Data Structures

Macros

Typedefs

Functions

Variables

Macro Definition Documentation

◆ L_ADD

◆ L_ADDHI

◆ L_CLR

◆ L_GINT

◆ L_ISNEG

◆ L_LINT

◆ L_MPY

◆ L_NEG

◆ L_RSHIFT

◆ L_SUB

◆ NTP_ASSERT_LOCKED

◆ NTP_LOCK

◆ NTP_UNLOCK

◆ SHIFT_FLL

◆ SHIFT_PLL

Typedef Documentation

◆ l_fp

Function Documentation

◆ __FBSDID()

◆ hardupdate()

◆ kern_adjtime()

◆ kern_ntp_adjtime()

◆ MTX_SYSINIT()

◆ ntp_gettime1()

◆ ntp_is_time_error()

◆ ntp_sysctl()

◆ ntp_update_second()

◆ periodic_resettodr()

◆ shutdown_resettodr()

◆ start_periodic_resettodr()

◆ sys_adjtime()

◆ sys_ntp_adjtime()

◆ sys_ntp_gettime()

◆ SYSCTL_NODE()

◆ SYSCTL_PROC() [1/2]

◆ SYSCTL_PROC() [2/2]

◆ sysctl_resettodr_period()

◆ SYSINIT()

Variable Documentation

◆ ntp_lock

◆ resettodr_callout

◆ resettodr_period

◆ time_adj

◆ time_adjtime

◆ time_constant

◆ time_esterror

◆ time_freq

◆ time_maxerror

◆ time_monitor

◆ time_offset

◆ time_precision

◆ time_reftime

◆ time_state

◆ time_status

◆ time_tai