kern_acct.c File Reference

#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/acct.h>
#include <sys/fcntl.h>
#include <sys/kernel.h>
#include <sys/kthread.h>
#include <sys/limits.h>
#include <sys/lock.h>
#include <sys/mount.h>
#include <sys/mutex.h>
#include <sys/namei.h>
#include <sys/priv.h>
#include <sys/proc.h>
#include <sys/resourcevar.h>
#include <sys/sched.h>
#include <sys/sx.h>
#include <sys/sysctl.h>
#include <sys/sysent.h>
#include <sys/syslog.h>
#include <sys/sysproto.h>
#include <sys/tty.h>
#include <sys/vnode.h>
#include <security/mac/mac_framework.h>

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Macros
#define	FLT_MANT_DIG   24 /* p */
#define	FLT_MAX_EXP   128 /* emax */
#define	ACCT_RUNNING   1 /* Accounting kthread is running. */
#define	ACCT_EXITREQ   2 /* Accounting kthread should exit. */
#define	MANT_MASK   ((1 << (FLT_MANT_DIG - 1)) - 1)
#define	CALC_BITS   28
#define	LOG2_1M   20

Functions
	__FBSDID ("$BSDSUniX$")
static uint32_t	encode_timeval (struct timeval)
static uint32_t	encode_long (long)
static void	acctwatch (void)
static void	acct_thread (void *)
static int	acct_disable (struct thread *, int)
	SX_SYSINIT (acct,&acct_sx,"acct_sx")
	SYSCTL_INT (_kern, OID_AUTO, acct_suspend, CTLFLAG_RW,&acctsuspend, 0,"percentage of free disk space below which accounting stops")
	SYSCTL_INT (_kern, OID_AUTO, acct_resume, CTLFLAG_RW,&acctresume, 0,"percentage of free disk space above which accounting resumes")
static int	sysctl_acct_chkfreq (SYSCTL_HANDLER_ARGS)
	SYSCTL_PROC (_kern, OID_AUTO, acct_chkfreq, CTLTYPE_INT|CTLFLAG_RW,&acctchkfreq, 0, sysctl_acct_chkfreq,"I","frequency for checking the free space")
	SYSCTL_INT (_kern, OID_AUTO, acct_configured, CTLFLAG_RD,&acct_configured, 0,"Accounting configured or not")
	SYSCTL_INT (_kern, OID_AUTO, acct_suspended, CTLFLAG_RD,&acct_suspended, 0,"Accounting suspended or not")
int	sys_acct (struct thread *td, struct acct_args *uap)
int	acct_process (struct thread *td)

Variables
static int	acct_configured
static int	acct_suspended
static struct vnode *	acct_vp
static struct ucred *	acct_cred
static struct plimit *	acct_limit
static int	acct_flags
static struct sx	acct_sx
static int	acct_state
static int	acctsuspend = 2
static int	acctresume = 4
static int	acctchkfreq = 15

Macro Definition Documentation

#define ACCT_EXITREQ   2 /* Accounting kthread should exit. */

Definition at line 148 of file kern_acct.c.

Referenced by acct_thread(), acctwatch(), and sys_acct().

#define ACCT_RUNNING   1 /* Accounting kthread is running. */

Definition at line 147 of file kern_acct.c.

Referenced by acct_thread(), and sys_acct().

#define CALC_BITS   28

Definition at line 468 of file kern_acct.c.

Referenced by encode_timeval().

#define FLT_MANT_DIG   24 /* p */

Definition at line 113 of file kern_acct.c.

Referenced by encode_long(), and encode_timeval().

#define FLT_MAX_EXP   128 /* emax */

Definition at line 114 of file kern_acct.c.

Referenced by encode_long(), and encode_timeval().

#define LOG2_1M   20

Definition at line 471 of file kern_acct.c.

Referenced by encode_timeval().

#define MANT_MASK   ((1 << (FLT_MANT_DIG - 1)) - 1)

Definition at line 460 of file kern_acct.c.

Referenced by encode_long(), and encode_timeval().

Function Documentation

__FBSDID

(

"$BSDSUniX$"

)

static int acct_disable ( struct thread *  td, int  logging  )

static

Definition at line 324 of file kern_acct.c.

References acct_configured, acct_cred, acct_flags, acct_limit, acct_sx, acct_vp, crfree(), lim_free(), log(), and vn_close().

Referenced by acctwatch(), and sys_acct().

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int acct_process

(

struct thread *

td

)

Definition at line 348 of file kern_acct.c.

References acct_cred, acct_limit, acct_suspended, acct_sx, acct_vp, boottime, encode_long(), encode_timeval(), hz, lim_free(), lim_hold(), microuptime(), proctree_lock, rufetchcalc(), tick, timevaladd(), timevalsub(), tty_udev(), and vn_rdwr().

Referenced by exit1().

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static void acct_thread ( void *  dummy )

static

Definition at line 622 of file kern_acct.c.

References ACCT_EXITREQ, ACCT_RUNNING, acct_state, acct_sx, acctchkfreq, acctwatch(), hz, kproc_exit(), and sched_prio().

Referenced by sys_acct().

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static void acctwatch ( void  )

static

Definition at line 564 of file kern_acct.c.

References acct_disable(), ACCT_EXITREQ, acct_state, acct_suspended, acct_sx, acct_vp, acctresume, acctsuspend, and log().

Referenced by acct_thread().

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static uint32_t encode_long ( long  val )

static

Definition at line 529 of file kern_acct.c.

References FLT_MANT_DIG, FLT_MAX_EXP, log(), MANT_MASK, and printf().

Referenced by acct_process().

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static uint32_t encode_timeval ( struct timeval  tv )

static

Definition at line 479 of file kern_acct.c.

References CALC_BITS, FLT_MANT_DIG, FLT_MAX_EXP, LOG2_1M, MANT_MASK, and printf().

Referenced by acct_process().

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SX_SYSINIT	(	acct	,
		&	acct_sx,
		"acct_sx"
	)

int sys_acct	(	struct thread *	td,
		struct acct_args *	uap
	)

Definition at line 197 of file kern_acct.c.

References acct_configured, acct_cred, acct_disable(), ACCT_EXITREQ, acct_flags, acct_limit, ACCT_RUNNING, acct_state, acct_suspended, acct_sx, acct_thread(), acct_vp, crhold(), kproc_create(), lim_alloc(), log(), NDFREE(), priv_check(), vn_close(), vn_open(), and wakeup().

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static int sysctl_acct_chkfreq ( SYSCTL_HANDLER_ARGS  )

static

Definition at line 164 of file kern_acct.c.

References acctchkfreq, and value.

SYSCTL_INT	(	_kern	,
		OID_AUTO	,
		acct_suspend	,
		CTLFLAG_RW	,
		&	acctsuspend,
		0	,
		"percentage of free disk space below which accounting stops"
	)

SYSCTL_INT	(	_kern	,
		OID_AUTO	,
		acct_resume	,
		CTLFLAG_RW	,
		&	acctresume,
		0	,
		"percentage of free disk space above which accounting resumes"
	)

SYSCTL_INT	(	_kern	,
		OID_AUTO	,
		acct_configured	,
		CTLFLAG_RD	,
		&	acct_configured,
		0	,
		"Accounting configured or not"
	)

SYSCTL_INT	(	_kern	,
		OID_AUTO	,
		acct_suspended	,
		CTLFLAG_RD	,
		&	acct_suspended,
		0	,
		"Accounting suspended or not"
	)

SYSCTL_PROC	(	_kern	,
		OID_AUTO	,
		acct_chkfreq	,
		CTLTYPE_INT|	CTLFLAG_RW,
		&	acctchkfreq,
		0	,
		sysctl_acct_chkfreq	,
		"I"	,
		"frequency for checking the free space"
	)

Variable Documentation

int acct_configured

static

Definition at line 132 of file kern_acct.c.

Referenced by acct_disable(), and sys_acct().

struct ucred* acct_cred

static

Definition at line 135 of file kern_acct.c.

Referenced by acct_disable(), acct_process(), and sys_acct().

int acct_flags

static

Definition at line 137 of file kern_acct.c.

Referenced by acct_disable(), and sys_acct().

struct plimit* acct_limit

static

Definition at line 136 of file kern_acct.c.

Referenced by acct_disable(), acct_process(), and sys_acct().

int acct_state

static

Definition at line 145 of file kern_acct.c.

Referenced by acct_thread(), acctwatch(), and sys_acct().

int acct_suspended

static

Definition at line 133 of file kern_acct.c.

Referenced by acct_process(), acctwatch(), and sys_acct().

struct sx acct_sx

static

Definition at line 138 of file kern_acct.c.

Referenced by acct_disable(), acct_process(), acct_thread(), acctwatch(), and sys_acct().

struct vnode* acct_vp

static

Definition at line 134 of file kern_acct.c.

Referenced by acct_disable(), acct_process(), acctwatch(), and sys_acct().

int acctchkfreq = 15

static

Definition at line 161 of file kern_acct.c.

Referenced by acct_thread(), and sysctl_acct_chkfreq().

int acctresume = 4

static

Definition at line 157 of file kern_acct.c.

Referenced by acctwatch().

int acctsuspend = 2

static

Definition at line 153 of file kern_acct.c.

Referenced by acctwatch().