subr_log.c File Reference

#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/proc.h>
#include <sys/vnode.h>
#include <sys/filio.h>
#include <sys/ttycom.h>
#include <sys/msgbuf.h>
#include <sys/signalvar.h>
#include <sys/kernel.h>
#include <sys/poll.h>
#include <sys/filedesc.h>
#include <sys/sysctl.h>

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Data Structures
struct	logsoftc

Macros
#define	LOG_RDPRI   (PZERO + 1)
#define	LOG_ASYNC   0x04

Functions
	__FBSDID ("$FreeBSD$")
static void	logtimeout (void *arg)
static int	logkqread (struct knote *note, long hint)
static void	logkqdetach (struct knote *note)
	MTX_SYSINIT (msgbuf_lock, &msgbuf_lock, "msgbuf lock", MTX_DEF)
	SYSCTL_INT (_kern, OID_AUTO, log_wakeups_per_second, CTLFLAG_RW, &log_wakeups_per_second, 0, "How often (times per second) to check for /dev/log waiters.")
static int	logopen (struct cdev *dev, int flags, int mode, struct thread *td)
static int	logclose (struct cdev *dev, int flag, int mode, struct thread *td)
static int	logread (struct cdev *dev, struct uio *uio, int flag)
static int	logpoll (struct cdev *dev, int events, struct thread *td)
static int	logkqfilter (struct cdev *dev, struct knote *kn)
static int	logioctl (struct cdev *dev, u_long com, caddr_t data, int flag, struct thread *td)
static void	log_drvinit (void *unused)
	SYSINIT (logdev, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, log_drvinit, NULL)

Variables
static d_open_t	logopen
static d_close_t	logclose
static d_read_t	logread
static d_ioctl_t	logioctl
static d_poll_t	logpoll
static d_kqfilter_t	logkqfilter
static struct cdevsw	log_cdevsw
static struct filterops	log_read_filterops
static struct logsoftc	logsoftc
int	log_open
static struct cv	log_wakeup
struct mtx	msgbuf_lock
static int	log_wakeups_per_second = 5

Macro Definition Documentation

LOG_ASYNC

#define LOG_ASYNC   0x04

Definition at line 57 of file subr_log.c.

LOG_RDPRI

#define LOG_RDPRI   (PZERO + 1)

Definition at line 55 of file subr_log.c.

Function Documentation

__FBSDID()

__FBSDID

(

"$FreeBSD$"

)

log_drvinit()

static void log_drvinit ( void *  unused )

static

Definition at line 301 of file subr_log.c.

References cv_init(), knlist_init_mtx(), log_cdevsw, log_wakeup, make_dev_credf(), msgbuf_lock, logsoftc::sc_callout, and logsoftc::sc_selp.

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logclose()

static int logclose ( struct cdev *  dev, int  flag, int  mode, struct thread *  td  )

static

Definition at line 132 of file subr_log.c.

References funsetown(), log_open, msgbuf_lock, logsoftc::sc_callout, logsoftc::sc_sigio, and logsoftc::sc_state.

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logioctl()

static int logioctl ( struct cdev *  dev, u_long  com, caddr_t  data, int  flag, struct thread *  td  )

static

Definition at line 257 of file subr_log.c.

References data, fgetown(), fsetown(), LOG_ASYNC, msgbuf_getcount(), msgbuf_lock, msgbufp, logsoftc::sc_sigio, and logsoftc::sc_state.

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logkqdetach()

static void logkqdetach ( struct knote *  note )

static

Definition at line 224 of file subr_log.c.

References knlist_remove(), msgbuf_lock, and logsoftc::sc_selp.

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logkqfilter()

static int logkqfilter ( struct cdev *  dev, struct knote *  kn  )

static

Definition at line 199 of file subr_log.c.

References knlist_add(), log_read_filterops, msgbuf_lock, and logsoftc::sc_selp.

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logkqread()

static int logkqread ( struct knote *  note, long  hint  )

static

Definition at line 215 of file subr_log.c.

References msgbuf_getcount(), msgbuf_lock, and msgbufp.

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logopen()

static int logopen ( struct cdev *  dev, int  flags, int  mode, struct thread *  td  )

static

Definition at line 108 of file subr_log.c.

References fsetown(), log_open, log_wakeups_per_second, logtimeout(), msgbuf_lock, printf(), logsoftc::sc_callout, and logsoftc::sc_sigio.

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logpoll()

static int logpoll ( struct cdev *  dev, int  events, struct thread *  td  )

static

Definition at line 183 of file subr_log.c.

References msgbuf_getcount(), msgbuf_lock, msgbufp, logsoftc::sc_selp, and selrecord().

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logread()

static int logread ( struct cdev *  dev, struct uio *  uio, int  flag  )

static

Definition at line 148 of file subr_log.c.

References buf, flag, log_wakeup, msgbuf_getbytes(), msgbuf_getcount(), msgbuf_lock, msgbufp, and uiomove().

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logtimeout()

static void logtimeout ( void *  arg )

static

Definition at line 233 of file subr_log.c.

References cv_broadcastpri(), LOG_ASYNC, log_open, LOG_RDPRI, log_wakeup, log_wakeups_per_second, logtimeout(), msgbuftrigger, pgsigio(), printf(), logsoftc::sc_callout, logsoftc::sc_selp, logsoftc::sc_sigio, logsoftc::sc_state, and selwakeuppri().

Referenced by logopen(), and logtimeout().

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MTX_SYSINIT()

MTX_SYSINIT	(	msgbuf_lock	,
		&	msgbuf_lock,
		"msgbuf lock"	,
		MTX_DEF
	)

SYSCTL_INT()

SYSCTL_INT	(	_kern	,
		OID_AUTO	,
		log_wakeups_per_second	,
		CTLFLAG_RW	,
		&	log_wakeups_per_second,
		0	,
		"How often (times per second) to check for /dev/log waiters."
	)

SYSINIT()

SYSINIT	(	logdev	,
		SI_SUB_DRIVERS	,
		SI_ORDER_MIDDLE	,
		log_drvinit	,
		NULL
	)

Variable Documentation

log_cdevsw

struct cdevsw log_cdevsw

static

Initial value:

= {
        .d_version =    D_VERSION,
        .d_open =       logopen,
        .d_close =      logclose,
        .d_read =       logread,
        .d_ioctl =      logioctl,
        .d_poll =       logpoll,
        .d_kqfilter =   logkqfilter,
        .d_name =       "log",
}

Definition at line 68 of file subr_log.c.

Referenced by log_drvinit().

log_open

int log_open

Definition at line 96 of file subr_log.c.

Referenced by logclose(), logopen(), logtimeout(), and vlog().

log_read_filterops

struct filterops log_read_filterops

static

Initial value:

= {
        .f_isfd =       1,
        .f_attach =     NULL,
        .f_detach =     logkqdetach,
        .f_event =      logkqread,
}

Definition at line 82 of file subr_log.c.

Referenced by logkqfilter().

log_wakeup

struct cv log_wakeup

static

Definition at line 97 of file subr_log.c.

Referenced by log_drvinit(), logread(), and logtimeout().

log_wakeups_per_second

int log_wakeups_per_second = 5

static

Definition at line 101 of file subr_log.c.

Referenced by logopen(), and logtimeout().

logclose

d_close_t logclose

static

Definition at line 60 of file subr_log.c.

logioctl

d_ioctl_t logioctl

static

Definition at line 62 of file subr_log.c.

logkqfilter

d_kqfilter_t logkqfilter

static

Definition at line 64 of file subr_log.c.

logopen

d_open_t logopen

static

Definition at line 59 of file subr_log.c.

logpoll

d_poll_t logpoll

static

Definition at line 63 of file subr_log.c.

logread

d_read_t logread

static

Definition at line 61 of file subr_log.c.

logsoftc

struct logsoftc logsoftc

static

msgbuf_lock

struct mtx msgbuf_lock

Definition at line 98 of file subr_log.c.

Referenced by log_drvinit(), logclose(), logioctl(), logkqdetach(), logkqfilter(), logkqread(), logopen(), logpoll(), logread(), sysctl_kern_msgbuf(), and sysctl_kern_msgbuf_clear().