#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) */

Typedefs
typedef int64_t	l_fp

Functions
	__FBSDID ("$BSDSUniX$")

static void	ntp_init (void)

static void	hardupdate (long offset)

static void	ntp_gettime1 (struct ntptimeval *ntvp)

static int	ntp_is_time_error (void)

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, 0,"")

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

int	sys_ntp_adjtime (struct thread td, struct ntp_adjtime_args uap)

void	ntp_update_second (int64_t adjustment, time_t newsec)

	SYSINIT (ntpclocks, SI_SUB_CLOCKS, SI_ORDER_MIDDLE, ntp_init, NULL)

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_RW,&resettodr_period, 1800, sysctl_resettodr_period,"I","Save system time to RTC with this period (in seconds)")

	TUNABLE_INT ("machdep.rtc_save_period",&resettodr_period)

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

static 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

static 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 callout	resettodr_callout

static int	resettodr_period = 1800

Macro Definition Documentation

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

Definition at line 62 of file kern_ntptime.c.

Referenced by hardupdate(), and ntp_update_second().

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

Definition at line 64 of file kern_ntptime.c.

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

Definition at line 74 of file kern_ntptime.c.

Referenced by ntp_init().

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

Definition at line 77 of file kern_ntptime.c.

Referenced by hardupdate(), and sys_ntp_adjtime().

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

Definition at line 75 of file kern_ntptime.c.

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

Definition at line 76 of file kern_ntptime.c.

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

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

Definition at line 73 of file kern_ntptime.c.

Referenced by hardupdate().

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

Definition at line 65 of file kern_ntptime.c.

#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.

Referenced by hardupdate(), and ntp_update_second().

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

Definition at line 63 of file kern_ntptime.c.

Referenced by ntp_update_second().

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

Definition at line 148 of file kern_ntptime.c.

Referenced by hardupdate().

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

Definition at line 147 of file kern_ntptime.c.

Referenced by hardupdate(), and ntp_update_second().

Typedef Documentation

typedef int64_t l_fp

Definition at line 61 of file kern_ntptime.c.

Function Documentation

__FBSDID ( "$BSDSUniX$" )

static void hardupdate ( long offset )

static

Definition at line 663 of file kern_ntptime.c.

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

Referenced by sys_ntp_adjtime().

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

Definition at line 954 of file kern_ntptime.c.

References Giant, priv_check(), and time_adjtime.

Referenced by sys_adjtime().

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static void ntp_gettime1 ( struct ntptimeval * ntvp )

static

Definition at line 246 of file kern_ntptime.c.

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

Referenced by ntp_sysctl(), and sys_ntp_gettime().

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static void ntp_init ( void )

static

Definition at line 619 of file kern_ntptime.c.

References L_CLR, time_freq, and time_offset.

static int ntp_is_time_error ( void )

static

Definition at line 209 of file kern_ntptime.c.

References time_status.

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

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static int ntp_sysctl ( SYSCTL_HANDLER_ARGS )

static

Definition at line 290 of file kern_ntptime.c.

References ntp_gettime1(), and sysctl_handle_opaque().

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void ntp_update_second	(	int64_t *	adjustment,
		time_t *	newsec
	)

Definition at line 480 of file kern_ntptime.c.

References L_ADD, L_LINT, L_RSHIFT, L_SUB, 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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static void periodic_resettodr ( void *arg __unused )

static

Definition at line 985 of file kern_ntptime.c.

References callout_schedule(), Giant, hz, ntp_is_time_error(), resettodr(), and resettodr_callout.

Referenced by start_periodic_resettodr(), and sysctl_resettodr_period().

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

static

Definition at line 998 of file kern_ntptime.c.

References Giant, ntp_is_time_error(), resettodr(), and resettodr_callout.

Referenced by start_periodic_resettodr().

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static void start_periodic_resettodr ( void *arg __unused )

static

Definition at line 1031 of file kern_ntptime.c.

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

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

Definition at line 935 of file kern_ntptime.c.

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

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

Definition at line 327 of file kern_ntptime.c.

References Giant, hardupdate(), L_GINT, L_LINT, ntp_is_time_error(), priv_check(), time_constant, time_esterror, time_freq, time_maxerror, time_offset, time_precision, time_state, time_status, time_tai, and ntp_adjtime_args::tp.

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

Definition at line 277 of file kern_ntptime.c.

References Giant, ntp_gettime1(), and ntp_gettime_args::ntvp.

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SYSCTL_NODE	(	_kern	,
		OID_AUTO	,
		ntp_pll	,
		CTLFLAG_RW	,
		0	,
		""
	)

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

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