kern_rangelock.c File Reference

#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/rangelock.h>
#include <sys/systm.h>
#include <vm/uma.h>

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Data Structures
struct	rl_q_entry

Functions
	__FBSDID ("$FreeBSD$")
static void	rangelock_sys_init (void)
	SYSINIT (vfs, SI_SUB_LOCK, SI_ORDER_ANY, rangelock_sys_init, NULL)
static struct rl_q_entry *	rlqentry_alloc (void)
void	rlqentry_free (struct rl_q_entry *rleq)
void	rangelock_init (struct rangelock *lock)
void	rangelock_destroy (struct rangelock *lock)
static int	ranges_overlap (const struct rl_q_entry *e1, const struct rl_q_entry *e2)
static void	rangelock_calc_block (struct rangelock *lock)
static void	rangelock_unlock_locked (struct rangelock *lock, struct rl_q_entry *entry, struct mtx *ilk, bool do_calc_block)
void	rangelock_unlock (struct rangelock *lock, void *cookie, struct mtx *ilk)
void *	rangelock_unlock_range (struct rangelock *lock, void *cookie, off_t start, off_t end, struct mtx *ilk)
static void *	rangelock_enqueue (struct rangelock *lock, off_t start, off_t end, int mode, struct mtx *ilk, bool trylock)
void *	rangelock_rlock (struct rangelock *lock, off_t start, off_t end, struct mtx *ilk)
void *	rangelock_tryrlock (struct rangelock *lock, off_t start, off_t end, struct mtx *ilk)
void *	rangelock_wlock (struct rangelock *lock, off_t start, off_t end, struct mtx *ilk)
void *	rangelock_trywlock (struct rangelock *lock, off_t start, off_t end, struct mtx *ilk)

Variables
static uma_zone_t	rl_entry_zone

Function Documentation

__FBSDID()

__FBSDID

(

"$FreeBSD$"

)

rangelock_calc_block()

static void rangelock_calc_block ( struct rangelock *  lock )

static

Definition at line 106 of file kern_rangelock.c.

References ranges_overlap(), and wakeup().

Referenced by rangelock_enqueue(), rangelock_unlock_locked(), and rangelock_unlock_range().

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rangelock_destroy()

void rangelock_destroy

(

struct rangelock *

lock

)

Definition at line 82 of file kern_rangelock.c.

Referenced by shm_drop(), and vnode_fini().

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rangelock_enqueue()

static void * rangelock_enqueue ( struct rangelock *  lock, off_t  start, off_t  end, int  mode, struct mtx *  ilk, bool  trylock  )

static

Definition at line 220 of file kern_rangelock.c.

References mode, rangelock_calc_block(), rangelock_unlock_locked(), rlqentry_alloc(), and start.

Referenced by rangelock_rlock(), rangelock_tryrlock(), rangelock_trywlock(), and rangelock_wlock().

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rangelock_init()

void rangelock_init

(

struct rangelock *

lock

)

Definition at line 74 of file kern_rangelock.c.

Referenced by shm_alloc(), and vnode_init().

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rangelock_rlock()

void * rangelock_rlock	(	struct rangelock *	lock,
		off_t	start,
		off_t	end,
		struct mtx *	ilk
	)

Definition at line 274 of file kern_rangelock.c.

References rangelock_enqueue(), and start.

Referenced by shm_ioctl(), shm_mmap(), and shm_read().

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rangelock_sys_init()

static void rangelock_sys_init ( void  )

static

Definition at line 51 of file kern_rangelock.c.

References rl_entry_zone.

rangelock_tryrlock()

void * rangelock_tryrlock	(	struct rangelock *	lock,
		off_t	start,
		off_t	end,
		struct mtx *	ilk
	)

Definition at line 281 of file kern_rangelock.c.

References rangelock_enqueue(), and start.

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rangelock_trywlock()

void * rangelock_trywlock	(	struct rangelock *	lock,
		off_t	start,
		off_t	end,
		struct mtx *	ilk
	)

Definition at line 296 of file kern_rangelock.c.

References rangelock_enqueue(), and start.

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rangelock_unlock()

void rangelock_unlock	(	struct rangelock *	lock,
		void *	cookie,
		struct mtx *	ilk
	)

Definition at line 179 of file kern_rangelock.c.

References rangelock_unlock_locked().

Referenced by kern_shm_open2(), shm_add_seals(), shm_dotruncate(), shm_fallocate(), shm_fspacectl(), shm_ioctl(), shm_mmap(), shm_read(), and shm_write().

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rangelock_unlock_locked()

static void rangelock_unlock_locked ( struct rangelock *  lock, struct rl_q_entry *  entry, struct mtx *  ilk, bool  do_calc_block  )

static

Definition at line 143 of file kern_rangelock.c.

References rangelock_calc_block(), and rlqentry_free().

Referenced by rangelock_enqueue(), rangelock_unlock(), and rangelock_unlock_range().

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rangelock_unlock_range()

void * rangelock_unlock_range	(	struct rangelock *	lock,
		void *	cookie,
		off_t	start,
		off_t	end,
		struct mtx *	ilk
	)

Definition at line 192 of file kern_rangelock.c.

References rangelock_calc_block(), rangelock_unlock_locked(), and start.

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rangelock_wlock()

void * rangelock_wlock	(	struct rangelock *	lock,
		off_t	start,
		off_t	end,
		struct mtx *	ilk
	)

Definition at line 289 of file kern_rangelock.c.

References rangelock_enqueue(), and start.

Referenced by kern_shm_open2(), shm_add_seals(), shm_dotruncate(), shm_fallocate(), shm_fspacectl(), shm_ioctl(), and shm_write().

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ranges_overlap()

static int ranges_overlap ( const struct rl_q_entry *  e1, const struct rl_q_entry *  e2  )

static

Definition at line 93 of file kern_rangelock.c.

Referenced by rangelock_calc_block().

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rlqentry_alloc()

static struct rl_q_entry * rlqentry_alloc ( void  )

static

Definition at line 60 of file kern_rangelock.c.

References rl_entry_zone.

Referenced by rangelock_enqueue().

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rlqentry_free()

void rlqentry_free

(

struct rl_q_entry *

rleq

)

Definition at line 67 of file kern_rangelock.c.

References rl_entry_zone.

Referenced by rangelock_unlock_locked(), and thread_fini().

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SYSINIT()

SYSINIT	(	vfs	,
		SI_SUB_LOCK	,
		SI_ORDER_ANY	,
		rangelock_sys_init	,
		NULL
	)

Variable Documentation

rl_entry_zone

uma_zone_t rl_entry_zone

static

Definition at line 48 of file kern_rangelock.c.

Referenced by rangelock_sys_init(), rlqentry_alloc(), and rlqentry_free().