#include <sys/cdefs.h>
#include "opt_kdtrace.h"
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/bio.h>
#include <sys/devicestat.h>
#include <sys/sdt.h>
#include <sys/sysctl.h>
#include <sys/malloc.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/conf.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <machine/atomic.h>

Include dependency graph for subr_devstat.c:

Data Structures
struct	statspage

Macros
#define	DTRACE_DEVSTAT_START() SDT_PROBE2(io, , , start, NULL, ds)

#define	DTRACE_DEVSTAT_BIO_START() SDT_PROBE2(io, , , start, bp, ds)

#define	DTRACE_DEVSTAT_DONE() SDT_PROBE2(io, , , done, NULL, ds)

#define	DTRACE_DEVSTAT_BIO_DONE() SDT_PROBE2(io, , , done, bp, ds)

#define	DTRACE_DEVSTAT_WAIT_START() SDT_PROBE2(io, , , wait__start, NULL, ds)

#define	DTRACE_DEVSTAT_WAIT_DONE() SDT_PROBE2(io, , , wait__done, NULL, ds)

#define	statsperpage (PAGE_SIZE / sizeof(struct devstat))

Functions
	__FBSDID ("$BSDSUniX$")

	SDT_PROVIDER_DEFINE (io)

	SDT_PROBE_DEFINE2 (io,,, start,"struct bio ","struct devstat ")

	SDT_PROBE_DEFINE2 (io,,, done,"struct bio ","struct devstat ")

	SDT_PROBE_DEFINE2 (io,,, wait__start,"struct bio ","struct devstat ")

	SDT_PROBE_DEFINE2 (io,,, wait__done,"struct bio ","struct devstat ")

	MTX_SYSINIT (devstat_mutex,&devstat_mutex,"devstat", MTX_DEF)

static struct devstat *	devstat_alloc (void)

static void	devstat_free (struct devstat *)

static void	devstat_add_entry (struct devstat ds, const void dev_name, int unit_number, uint32_t block_size, devstat_support_flags flags, devstat_type_flags device_type, devstat_priority priority)

struct devstat *	devstat_new_entry (const void *dev_name, int unit_number, uint32_t block_size, devstat_support_flags flags, devstat_type_flags device_type, devstat_priority priority)

void	devstat_remove_entry (struct devstat *ds)

void	devstat_start_transaction (struct devstat ds, struct bintime now)

void	devstat_start_transaction_bio (struct devstat ds, struct bio bp)

void	devstat_end_transaction (struct devstat ds, uint32_t bytes, devstat_tag_type tag_type, devstat_trans_flags flags, struct bintime now, struct bintime *then)

void	devstat_end_transaction_bio (struct devstat ds, struct bio bp)

void	devstat_end_transaction_bio_bt (struct devstat ds, struct bio bp, struct bintime *now)

static int	sysctl_devstat (SYSCTL_HANDLER_ARGS)

static	SYSCTL_NODE (_kern, OID_AUTO, devstat, CTLFLAG_RD, NULL,"Device Statistics")

	SYSCTL_PROC (_kern_devstat, OID_AUTO, all, CTLFLAG_RD\|CTLTYPE_OPAQUE, NULL, 0, sysctl_devstat,"S,devstat","All devices in the devstat list")

	SYSCTL_INT (_kern_devstat, OID_AUTO, numdevs, CTLFLAG_RD,&devstat_num_devs, 0,"Number of devices in the devstat list")

	SYSCTL_LONG (_kern_devstat, OID_AUTO, generation, CTLFLAG_RD,&devstat_generation, 0,"Devstat list generation")

	SYSCTL_INT (_kern_devstat, OID_AUTO, version, CTLFLAG_RD,&devstat_version, 0,"Devstat list version number")

static	TAILQ_HEAD (statspage)

	SYSCTL_INT (_debug_sizeof, OID_AUTO, devstat, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, sizeof(struct devstat),"sizeof(struct devstat)")

Variables
static int	devstat_num_devs

static long	devstat_generation = 1

static int	devstat_version = DEVSTAT_VERSION

static int	devstat_current_devnumber

static struct mtx	devstat_mutex

static struct devstatlist	device_statq = STAILQ_HEAD_INITIALIZER(device_statq)

static d_mmap_t	devstat_mmap

static struct cdevsw	devstat_cdevsw

Macro Definition Documentation

#define DTRACE_DEVSTAT_BIO_DONE ( ) SDT_PROBE2(io, , , done, bp, ds)

Definition at line 62 of file subr_devstat.c.

Referenced by devstat_end_transaction_bio_bt().

#define DTRACE_DEVSTAT_BIO_START ( ) SDT_PROBE2(io, , , start, bp, ds)

Definition at line 60 of file subr_devstat.c.

Referenced by devstat_start_transaction_bio().

#define DTRACE_DEVSTAT_DONE ( ) SDT_PROBE2(io, , , done, NULL, ds)

Definition at line 61 of file subr_devstat.c.

Referenced by devstat_end_transaction().

#define DTRACE_DEVSTAT_START ( ) SDT_PROBE2(io, , , start, NULL, ds)

Definition at line 59 of file subr_devstat.c.

Referenced by devstat_start_transaction().

#define DTRACE_DEVSTAT_WAIT_DONE ( ) SDT_PROBE2(io, , , wait__done, NULL, ds)

Definition at line 64 of file subr_devstat.c.

#define DTRACE_DEVSTAT_WAIT_START ( ) SDT_PROBE2(io, , , wait__start, NULL, ds)

Definition at line 63 of file subr_devstat.c.

#define statsperpage (PAGE_SIZE / sizeof(struct devstat))

Definition at line 458 of file subr_devstat.c.

Referenced by devstat_alloc(), and devstat_free().

Function Documentation

__FBSDID ( "$BSDSUniX$" )

static void devstat_add_entry	(	struct devstat *	ds,
		const void *	dev_name,
		int	unit_number,
		uint32_t	block_size,
		devstat_support_flags	flags,
		devstat_type_flags	device_type,
		devstat_priority	priority
	)

static

Definition at line 115 of file subr_devstat.c.

References binuptime(), device_statq, devstat_current_devnumber, devstat_generation, devstat_mutex, devstat_num_devs, printf(), and priority.

Referenced by devstat_new_entry().

Here is the call graph for this function:

Here is the caller graph for this function:

static struct devstat * devstat_alloc ( void )

static

Definition at line 497 of file subr_devstat.c.

References devstat_cdevsw, devstat_mutex, free(), make_dev_credf(), malloc(), and statsperpage.

Referenced by devstat_new_entry().

Here is the call graph for this function:

Here is the caller graph for this function:

void devstat_end_transaction	(	struct devstat *	ds,
		uint32_t	bytes,
		devstat_tag_type	tag_type,
		devstat_trans_flags	flags,
		struct bintime *	now,
		struct bintime *	then
	)

Definition at line 294 of file subr_devstat.c.

References bintime(), binuptime(), and DTRACE_DEVSTAT_DONE.

Referenced by devstat_end_transaction_bio_bt().

Here is the call graph for this function:

Here is the caller graph for this function:

void devstat_end_transaction_bio	(	struct devstat *	ds,
		struct bio *	bp
	)

Definition at line 340 of file subr_devstat.c.

References devstat_end_transaction_bio_bt().

Referenced by biofinish().

Here is the call graph for this function:

Here is the caller graph for this function:

void devstat_end_transaction_bio_bt	(	struct devstat *	ds,
		struct bio *	bp,
		struct bintime *	now
	)

Definition at line 347 of file subr_devstat.c.

References devstat_end_transaction(), and DTRACE_DEVSTAT_BIO_DONE.

Referenced by devstat_end_transaction_bio().

Here is the call graph for this function:

Here is the caller graph for this function:

static void devstat_free ( struct devstat * dsp )

static

Definition at line 562 of file subr_devstat.c.

References devstat_mutex, and statsperpage.

Referenced by devstat_remove_entry().

Here is the caller graph for this function:

struct devstat* devstat_new_entry	(	const void *	dev_name,
		int	unit_number,
		uint32_t	block_size,
		devstat_support_flags	flags,
		devstat_type_flags	device_type,
		devstat_priority	priority
	)

Definition at line 86 of file subr_devstat.c.

References binuptime(), devstat_add_entry(), devstat_alloc(), devstat_generation, and devstat_mutex.

Here is the call graph for this function:

void devstat_remove_entry ( struct devstat * ds )

Definition at line 196 of file subr_devstat.c.

References device_statq, devstat_free(), devstat_generation, devstat_mutex, and devstat_num_devs.

Here is the call graph for this function:

void devstat_start_transaction	(	struct devstat *	ds,
		struct bintime *	now
	)

Definition at line 226 of file subr_devstat.c.

References binuptime(), devstat_mutex, and DTRACE_DEVSTAT_START.

Referenced by devstat_start_transaction_bio().

Here is the call graph for this function:

Here is the caller graph for this function:

void devstat_start_transaction_bio	(	struct devstat *	ds,
		struct bio *	bp
	)

Definition at line 253 of file subr_devstat.c.

References binuptime(), devstat_mutex, devstat_start_transaction(), and DTRACE_DEVSTAT_BIO_START.

Here is the call graph for this function:

MTX_SYSINIT	(	devstat_mutex	,
		&	devstat_mutex,
		"devstat"	,
		MTX_DEF
	)

SDT_PROBE_DEFINE2	(	io	,
		start	,
		"struct bio *"	,
		"struct devstat *"
	)

SDT_PROBE_DEFINE2	(	io	,
		done	,
		"struct bio *"	,
		"struct devstat *"
	)

SDT_PROBE_DEFINE2	(	io	,
		wait__start	,
		"struct bio *"	,
		"struct devstat *"
	)

SDT_PROBE_DEFINE2	(	io	,
		wait__done	,
		"struct bio *"	,
		"struct devstat *"
	)

SDT_PROVIDER_DEFINE ( io )

static int sysctl_devstat ( SYSCTL_HANDLER_ARGS )

static

Definition at line 381 of file subr_devstat.c.

References device_statq, devstat_generation, devstat_mutex, and devstat_num_devs.

SYSCTL_INT	(	_kern_devstat	,
		OID_AUTO	,
		numdevs	,
		CTLFLAG_RD	,
		&	devstat_num_devs,
		0	,
		"Number of devices in the devstat list"
	)

SYSCTL_INT	(	_kern_devstat	,
		OID_AUTO	,
		version	,
		CTLFLAG_RD	,
		&	devstat_version,
		0	,
		"Devstat list version number"
	)

SYSCTL_INT	(	_debug_sizeof	,
		OID_AUTO	,
		devstat	,
		CTLFLAG_RD	,
		SYSCTL_NULL_INT_PTR	,
		sizeof(struct devstat)	,
		"sizeof(struct devstat)"
	)

SYSCTL_LONG	(	_kern_devstat	,
		OID_AUTO	,
		generation	,
		CTLFLAG_RD	,
		&	devstat_generation,
		0	,
		"Devstat list generation"
	)

static SYSCTL_NODE	(	_kern	,
		OID_AUTO	,
		devstat	,
		CTLFLAG_RD	,
		NULL	,
		"Device Statistics"
	)

static

SYSCTL_PROC	(	_kern_devstat	,
		OID_AUTO	,
		all	,
		CTLFLAG_RD\|	CTLTYPE_OPAQUE,
		NULL	,
		0	,
		sysctl_devstat	,
		"	S,
		devstat"	,
		"All devices in the devstat list"
	)

static TAILQ_HEAD ( statspage )

static

Definition at line 475 of file subr_devstat.c.

Variable Documentation

struct devstatlist device_statq = STAILQ_HEAD_INITIALIZER(device_statq)

static

Definition at line 73 of file subr_devstat.c.

Referenced by devstat_add_entry(), devstat_remove_entry(), and sysctl_devstat().

struct cdevsw devstat_cdevsw

static

Initial value:

= {
        .d_version =    D_VERSION,
        .d_flags =      D_NEEDGIANT,
        .d_mmap =       devstat_mmap,
        .d_name =       "devstat",
}