kern_hhook.c File Reference

#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/hhook.h>
#include <sys/khelp.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/module_khelp.h>
#include <sys/osd.h>
#include <sys/queue.h>
#include <sys/refcount.h>
#include <sys/systm.h>
#include <net/vnet.h>

Include dependency graph for kern_hhook.c:

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Data Structures
struct	hhook

Macros
#define	V_hhook_vhead_list   VNET(hhook_vhead_list)
#define	HHHLIST_LOCK()   mtx_lock(&hhook_head_list_lock)
#define	HHHLIST_UNLOCK()   mtx_unlock(&hhook_head_list_lock)
#define	HHHLIST_LOCK_ASSERT()   mtx_assert(&hhook_head_list_lock, MA_OWNED)
#define	HHH_LOCK_INIT(hhh)   rm_init(&(hhh)->hhh_lock, "hhook_head rm lock")
#define	HHH_LOCK_DESTROY(hhh)   rm_destroy(&(hhh)->hhh_lock)
#define	HHH_WLOCK(hhh)   rm_wlock(&(hhh)->hhh_lock)
#define	HHH_WUNLOCK(hhh)   rm_wunlock(&(hhh)->hhh_lock)
#define	HHH_RLOCK(hhh, rmpt)   rm_rlock(&(hhh)->hhh_lock, (rmpt))
#define	HHH_RUNLOCK(hhh, rmpt)   rm_runlock(&(hhh)->hhh_lock, (rmpt))

Functions
	__FBSDID ("$BSDSUniX$")
static	MALLOC_DEFINE (M_HHOOK,"hhook","Helper hooks are linked off hhook_head lists")
	LIST_HEAD (hhookheadhead, hhook_head)
	VNET_DEFINE (struct hhookheadhead, hhook_vhead_list)
	MTX_SYSINIT (hhookheadlistlock,&hhook_head_list_lock,"hhook_head list lock", MTX_DEF)
static void	hhook_head_destroy (struct hhook_head *hhh)
void	khelp_new_hhook_registered (struct hhook_head *hhh, uint32_t flags)
void	hhook_run_hooks (struct hhook_head *hhh, void *ctx_data, struct osd *hosd)
int	hhook_add_hook (struct hhook_head *hhh, struct hookinfo *hki, uint32_t flags)
int	hhook_add_hook_lookup (struct hookinfo *hki, uint32_t flags)
int	hhook_remove_hook (struct hhook_head *hhh, struct hookinfo *hki)
int	hhook_remove_hook_lookup (struct hookinfo *hki)
int	hhook_head_register (int32_t hhook_type, int32_t hhook_id, struct hhook_head **hhh, uint32_t flags)
int	hhook_head_deregister (struct hhook_head *hhh)
int	hhook_head_deregister_lookup (int32_t hhook_type, int32_t hhook_id)
struct hhook_head *	hhook_head_get (int32_t hhook_type, int32_t hhook_id)
void	hhook_head_release (struct hhook_head *hhh)
uint32_t	hhook_head_is_virtualised (struct hhook_head *hhh)
uint32_t	hhook_head_is_virtualised_lookup (int32_t hook_type, int32_t hook_id)
static void	hhook_vnet_init (const void *unused __unused)
static void	hhook_vnet_uninit (const void *unused __unused)
	VNET_SYSINIT (hhook_vnet_init, SI_SUB_MBUF, SI_ORDER_FIRST, hhook_vnet_init, NULL)
	VNET_SYSUNINIT (hhook_vnet_uninit, SI_SUB_MBUF, SI_ORDER_ANY, hhook_vnet_uninit, NULL)

Variables
struct hhookheadhead	hhook_head_list
static struct mtx	hhook_head_list_lock
static uint32_t	n_hhookheads

Macro Definition Documentation

#define HHH_LOCK_DESTROY

(

hhh

)

rm_destroy(&(hhh)->hhh_lock)

Definition at line 84 of file kern_hhook.c.

Referenced by hhook_head_destroy().

#define HHH_LOCK_INIT

(

hhh

)

rm_init(&(hhh)->hhh_lock, "hhook_head rm lock")

Definition at line 83 of file kern_hhook.c.

Referenced by hhook_head_register().

#define HHH_RLOCK	(		hhh,
			rmpt
	)		rm_rlock(&(hhh)->hhh_lock, (rmpt))

Definition at line 87 of file kern_hhook.c.

Referenced by hhook_run_hooks().

#define HHH_RUNLOCK	(		hhh,
			rmpt
	)		rm_runlock(&(hhh)->hhh_lock, (rmpt))

Definition at line 88 of file kern_hhook.c.

Referenced by hhook_run_hooks().

#define HHH_WLOCK

(

hhh

)

rm_wlock(&(hhh)->hhh_lock)

Definition at line 85 of file kern_hhook.c.

Referenced by hhook_add_hook(), hhook_head_destroy(), and hhook_remove_hook().

#define HHH_WUNLOCK

(

hhh

)

rm_wunlock(&(hhh)->hhh_lock)

Definition at line 86 of file kern_hhook.c.

Referenced by hhook_add_hook(), hhook_head_destroy(), and hhook_remove_hook().

#define HHHLIST_LOCK

(

)

mtx_lock(&hhook_head_list_lock)

Definition at line 79 of file kern_hhook.c.

Referenced by hhook_add_hook_lookup(), hhook_head_deregister(), hhook_head_get(), hhook_head_register(), hhook_remove_hook_lookup(), and hhook_vnet_uninit().

#define HHHLIST_LOCK_ASSERT

(

)

mtx_assert(&hhook_head_list_lock, MA_OWNED)

Definition at line 81 of file kern_hhook.c.

Referenced by hhook_head_destroy().

#define HHHLIST_UNLOCK

(

)

mtx_unlock(&hhook_head_list_lock)

Definition at line 80 of file kern_hhook.c.

Referenced by hhook_add_hook_lookup(), hhook_head_deregister(), hhook_head_get(), hhook_head_register(), hhook_remove_hook_lookup(), and hhook_vnet_uninit().

#define V_hhook_vhead_list   VNET(hhook_vhead_list)

Definition at line 66 of file kern_hhook.c.

Referenced by hhook_head_register(), hhook_vnet_init(), and hhook_vnet_uninit().

Function Documentation

__FBSDID

(

"$BSDSUniX$"

)

int hhook_add_hook	(	struct hhook_head *	hhh,
		struct hookinfo *	hki,
		uint32_t	flags
	)

Definition at line 130 of file kern_hhook.c.

References free(), HHH_WLOCK, HHH_WUNLOCK, hhook::hhk_func, hhook::hhk_helper, hhook::hhk_udata, and malloc().

Referenced by hhook_add_hook_lookup(), and khelp_new_hhook_registered().

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int hhook_add_hook_lookup	(	struct hookinfo *	hki,
		uint32_t	flags
	)

Definition at line 187 of file kern_hhook.c.

References free(), HHHLIST_LOCK, HHHLIST_UNLOCK, hhook_add_hook(), malloc(), and n_hhookheads.

Referenced by khelp_add_hhook(), and TAILQ_HEAD().

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int hhook_head_deregister

(

struct hhook_head *

hhh

)

Definition at line 366 of file kern_hhook.c.

References HHHLIST_LOCK, HHHLIST_UNLOCK, and hhook_head_destroy().

Referenced by hhook_head_deregister_lookup().

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int hhook_head_deregister_lookup	(	int32_t	hhook_type,
		int32_t	hhook_id
	)

Definition at line 388 of file kern_hhook.c.

References hhook_head_deregister(), hhook_head_get(), and hhook_head_release().

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static void hhook_head_destroy ( struct hhook_head *  hhh )

static

Definition at line 341 of file kern_hhook.c.

References free(), HHH_LOCK_DESTROY, HHH_WLOCK, HHH_WUNLOCK, HHHLIST_LOCK_ASSERT, and hhook_head_is_virtualised().

Referenced by hhook_head_deregister(), and hhook_vnet_uninit().

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struct hhook_head* hhook_head_get	(	int32_t	hhook_type,
		int32_t	hhook_id
	)

Definition at line 407 of file kern_hhook.c.

References HHHLIST_LOCK, HHHLIST_UNLOCK, and hhook_head_is_virtualised().

Referenced by hhook_head_deregister_lookup(), hhook_head_is_virtualised_lookup(), and hhook_head_register().

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uint32_t hhook_head_is_virtualised

(

struct hhook_head *

hhh

)

Definition at line 445 of file kern_hhook.c.

Referenced by hhook_head_destroy(), hhook_head_get(), and hhook_head_is_virtualised_lookup().

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uint32_t hhook_head_is_virtualised_lookup	(	int32_t	hook_type,
		int32_t	hook_id
	)

Definition at line 460 of file kern_hhook.c.

References hhook_head_get(), hhook_head_is_virtualised(), and hhook_head_release().

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int hhook_head_register	(	int32_t	hhook_type,
		int32_t	hhook_id,
		struct hhook_head **	hhh,
		uint32_t	flags
	)

Definition at line 291 of file kern_hhook.c.

References HHH_LOCK_INIT, HHHLIST_LOCK, HHHLIST_UNLOCK, hhook_head_get(), hhook_head_release(), khelp_new_hhook_registered(), malloc(), and V_hhook_vhead_list.

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void hhook_head_release

(

struct hhook_head *

hhh

)

Definition at line 432 of file kern_hhook.c.

Referenced by hhook_head_deregister_lookup(), hhook_head_is_virtualised_lookup(), and hhook_head_register().

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int hhook_remove_hook	(	struct hhook_head *	hhh,
		struct hookinfo *	hki
	)

Definition at line 245 of file kern_hhook.c.

References free(), HHH_WLOCK, HHH_WUNLOCK, hhook::hhk_func, and hhook::hhk_udata.

Referenced by hhook_remove_hook_lookup().

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int hhook_remove_hook_lookup

(

struct hookinfo *

hki

)

Definition at line 272 of file kern_hhook.c.

References HHHLIST_LOCK, HHHLIST_UNLOCK, and hhook_remove_hook().

Referenced by khelp_deregister_helper(), khelp_remove_hhook(), and TAILQ_HEAD().

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void hhook_run_hooks	(	struct hhook_head *	hhh,
		void *	ctx_data,
		struct osd *	hosd
	)

Definition at line 94 of file kern_hhook.c.

References HHH_RLOCK, HHH_RUNLOCK, hhook::hhk_func, hhook::hhk_helper, hhook::hhk_udata, and osd_get().

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static void hhook_vnet_init ( const void *unused  __unused )

static

Definition at line 480 of file kern_hhook.c.

References V_hhook_vhead_list.

static void hhook_vnet_uninit ( const void *unused  __unused )

static

Definition at line 490 of file kern_hhook.c.

References HHHLIST_LOCK, HHHLIST_UNLOCK, hhook_head_destroy(), printf(), and V_hhook_vhead_list.

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void khelp_new_hhook_registered	(	struct hhook_head *	hhh,
		uint32_t	flags
	)

Definition at line 289 of file kern_khelp.c.

References hhook_add_hook(), KHELP_LIST_RLOCK, KHELP_LIST_RUNLOCK, and printf().

Referenced by hhook_head_register().

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LIST_HEAD	(	hhookheadhead	,
		hhook_head
	)

static MALLOC_DEFINE ( M_HHOOK  , "hhook"  , "Helper hooks are linked off hhook_head lists"    )

static

MTX_SYSINIT	(	hhookheadlistlock	,
		&	hhook_head_list_lock,
		"hhook_head list lock"	,
		MTX_DEF
	)

VNET_DEFINE	(	struct hhookheadhead	,
		hhook_vhead_list
	)

VNET_SYSINIT	(	hhook_vnet_init	,
		SI_SUB_MBUF	,
		SI_ORDER_FIRST	,
		hhook_vnet_init	,
		NULL
	)

VNET_SYSUNINIT	(	hhook_vnet_uninit	,
		SI_SUB_MBUF	,
		SI_ORDER_ANY	,
		hhook_vnet_uninit	,
		NULL
	)

Variable Documentation

struct hhookheadhead hhook_head_list

Definition at line 64 of file kern_hhook.c.

struct mtx hhook_head_list_lock

static

Definition at line 68 of file kern_hhook.c.

uint32_t n_hhookheads

static

Definition at line 73 of file kern_hhook.c.

Referenced by hhook_add_hook_lookup().