#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/disk.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 ("$FreeBSD$")

	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, const struct bintime now)

void	devstat_start_transaction_bio (struct devstat ds, struct bio bp)

void	devstat_start_transaction_bio_t0 (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, const struct bintime now, const struct bintime *then)

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

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

static int	sysctl_devstat (SYSCTL_HANDLER_ARGS)

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

	SYSCTL_PROC (_kern_devstat, OID_AUTO, all, CTLFLAG_RD\|CTLTYPE_OPAQUE\|CTLFLAG_MPSAFE, 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)

static int	devstat_mmap (struct cdev dev, vm_ooffset_t offset, vm_paddr_t paddr, int nprot, vm_memattr_t *memattr)

	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_ioctl_t	devstat_ioctl

static d_mmap_t	devstat_mmap

static struct cdevsw	devstat_cdevsw

static size_t	pagelist_pages = 0

Macro Definition Documentation

◆ DTRACE_DEVSTAT_BIO_DONE

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

Definition at line 63 of file subr_devstat.c.

◆ DTRACE_DEVSTAT_BIO_START

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

Definition at line 61 of file subr_devstat.c.

◆ DTRACE_DEVSTAT_DONE

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

Definition at line 62 of file subr_devstat.c.

◆ DTRACE_DEVSTAT_START

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

Definition at line 60 of file subr_devstat.c.

◆ DTRACE_DEVSTAT_WAIT_DONE

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

Definition at line 65 of file subr_devstat.c.

◆ DTRACE_DEVSTAT_WAIT_START

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

Definition at line 64 of file subr_devstat.c.

◆ statsperpage

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

Definition at line 475 of file subr_devstat.c.

Function Documentation

◆ __FBSDID()

__FBSDID ( "$FreeBSD$" )

◆ devstat_add_entry()

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 117 of file subr_devstat.c.

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

Referenced by devstat_new_entry().

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◆ devstat_alloc()

static struct devstat * devstat_alloc ( void )

static

Definition at line 535 of file subr_devstat.c.

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

Referenced by devstat_new_entry().

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◆ devstat_end_transaction()

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

Definition at line 302 of file subr_devstat.c.

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

Referenced by devstat_end_transaction_bio_bt().

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◆ devstat_end_transaction_bio()

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

Definition at line 348 of file subr_devstat.c.

References devstat_end_transaction_bio_bt().

Referenced by biofinish().

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◆ devstat_end_transaction_bio_bt()

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

Definition at line 355 of file subr_devstat.c.

References devstat_end_transaction(), and DTRACE_DEVSTAT_BIO_DONE.

Referenced by devstat_end_transaction_bio().

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◆ devstat_free()

static void devstat_free ( struct devstat * dsp )

static

Definition at line 601 of file subr_devstat.c.

References devstat_mutex, and statsperpage.

Referenced by devstat_remove_entry().

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◆ devstat_mmap()

static int devstat_mmap	(	struct cdev *	dev,
		vm_ooffset_t	offset,
		vm_paddr_t *	paddr,
		int	nprot,
		vm_memattr_t *	memattr
	)

static

Definition at line 514 of file subr_devstat.c.

References devstat_mutex.

◆ devstat_new_entry()

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 87 of file subr_devstat.c.

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

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◆ devstat_remove_entry()

void devstat_remove_entry ( struct devstat * ds )

Definition at line 198 of file subr_devstat.c.

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

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◆ devstat_start_transaction()

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

Definition at line 228 of file subr_devstat.c.

References binuptime(), and DTRACE_DEVSTAT_START.

Referenced by devstat_start_transaction_bio_t0().

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◆ devstat_start_transaction_bio()

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

Definition at line 252 of file subr_devstat.c.

References binuptime(), and devstat_start_transaction_bio_t0().

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◆ devstat_start_transaction_bio_t0()

void devstat_start_transaction_bio_t0	(	struct devstat *	ds,
		struct bio *	bp
	)

Definition at line 264 of file subr_devstat.c.

References devstat_start_transaction(), and DTRACE_DEVSTAT_BIO_START.

Referenced by devstat_start_transaction_bio().

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◆ MTX_SYSINIT()

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

◆ SDT_PROBE_DEFINE2() [1/4]

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

◆ SDT_PROBE_DEFINE2() [2/4]

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

◆ SDT_PROBE_DEFINE2() [3/4]

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

◆ SDT_PROBE_DEFINE2() [4/4]

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

◆ SDT_PROVIDER_DEFINE()

SDT_PROVIDER_DEFINE ( io )

◆ sysctl_devstat()

static int sysctl_devstat ( SYSCTL_HANDLER_ARGS )

static

Definition at line 396 of file subr_devstat.c.

References device_statq, devstat_generation, devstat_mutex, and devstat_num_devs.

◆ SYSCTL_INT() [1/3]

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

◆ SYSCTL_INT() [2/3]

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

◆ SYSCTL_INT() [3/3]

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

◆ SYSCTL_LONG()

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

◆ SYSCTL_NODE()

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

static

◆ SYSCTL_PROC()

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

◆ TAILQ_HEAD()

static TAILQ_HEAD ( statspage )

static

Definition at line 494 of file subr_devstat.c.

Variable Documentation

◆ device_statq

struct devstatlist device_statq = STAILQ_HEAD_INITIALIZER(device_statq)

static

Definition at line 74 of file subr_devstat.c.

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

◆ devstat_cdevsw

struct cdevsw devstat_cdevsw

static

Initial value:

= {
        .d_version =    D_VERSION,
        .d_ioctl =      devstat_ioctl,
        .d_mmap =       devstat_mmap,
        .d_name =       "devstat",
}

Definition at line 480 of file subr_devstat.c.

Referenced by devstat_alloc().

◆ devstat_current_devnumber

int devstat_current_devnumber

static

Definition at line 70 of file subr_devstat.c.

Referenced by devstat_add_entry().

◆ devstat_generation

long devstat_generation = 1

static

Definition at line 68 of file subr_devstat.c.

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

◆ devstat_ioctl

d_ioctl_t devstat_ioctl

static

Definition at line 477 of file subr_devstat.c.

◆ devstat_mmap

d_mmap_t devstat_mmap

static

Definition at line 478 of file subr_devstat.c.

◆ devstat_mutex

struct mtx devstat_mutex

static

Definition at line 71 of file subr_devstat.c.

Referenced by devstat_add_entry(), devstat_alloc(), devstat_free(), devstat_mmap(), devstat_new_entry(), devstat_remove_entry(), and sysctl_devstat().

◆ devstat_num_devs

int devstat_num_devs

static

Definition at line 67 of file subr_devstat.c.

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

◆ devstat_version

int devstat_version = DEVSTAT_VERSION

static

Definition at line 69 of file subr_devstat.c.

◆ pagelist_pages

size_t pagelist_pages = 0

static

Definition at line 493 of file subr_devstat.c.

Referenced by devstat_alloc().

Data Structures

Macros

Functions

Variables

Macro Definition Documentation

◆ DTRACE_DEVSTAT_BIO_DONE

◆ DTRACE_DEVSTAT_BIO_START

◆ DTRACE_DEVSTAT_DONE

◆ DTRACE_DEVSTAT_START

◆ DTRACE_DEVSTAT_WAIT_DONE

◆ DTRACE_DEVSTAT_WAIT_START

◆ statsperpage

Function Documentation

◆ __FBSDID()

◆ devstat_add_entry()

◆ devstat_alloc()

◆ devstat_end_transaction()

◆ devstat_end_transaction_bio()

◆ devstat_end_transaction_bio_bt()

◆ devstat_free()

◆ devstat_mmap()

◆ devstat_new_entry()

◆ devstat_remove_entry()

◆ devstat_start_transaction()

◆ devstat_start_transaction_bio()

◆ devstat_start_transaction_bio_t0()

◆ MTX_SYSINIT()

◆ SDT_PROBE_DEFINE2() [1/4]

◆ SDT_PROBE_DEFINE2() [2/4]

◆ SDT_PROBE_DEFINE2() [3/4]

◆ SDT_PROBE_DEFINE2() [4/4]

◆ SDT_PROVIDER_DEFINE()

◆ sysctl_devstat()

◆ SYSCTL_INT() [1/3]

◆ SYSCTL_INT() [2/3]

◆ SYSCTL_INT() [3/3]

◆ SYSCTL_LONG()

◆ SYSCTL_NODE()

◆ SYSCTL_PROC()

◆ TAILQ_HEAD()

Variable Documentation

◆ device_statq

◆ devstat_cdevsw

◆ devstat_current_devnumber

◆ devstat_generation

◆ devstat_ioctl

◆ devstat_mmap

◆ devstat_mutex

◆ devstat_num_devs

◆ devstat_version

◆ pagelist_pages