[apple/xnu.git] / bsd / sys / systm.h

/*
 * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*-
 * Copyright (c) 1982, 1988, 1991, 1993
 *	The Regents of the University of California.  All rights reserved.
 * (c) UNIX System Laboratories, Inc.
 * All or some portions of this file are derived from material licensed
 * to the University of California by American Telephone and Telegraph
 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
 * the permission of UNIX System Laboratories, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)systm.h	8.7 (Berkeley) 3/29/95
 */
 
/*
 * The `securelevel' variable controls the security level of the system.
 * It can only be decreased by process 1 (/sbin/init).
 *
 * Security levels are as follows:
 *   -1	permannently insecure mode - always run system in level 0 mode.
 *    0	insecure mode - immutable and append-only flags make be turned off.
 *	All devices may be read or written subject to permission modes.
 *    1	secure mode - immutable and append-only flags may not be changed;
 *	raw disks of mounted filesystems, /dev/mem, and /dev/kmem are
 *	read-only.
 *    2	highly secure mode - same as (1) plus raw disks are always
 *	read-only whether mounted or not. This level precludes tampering 
 *	with filesystems by unmounting them, but also inhibits running
 *	newfs while the system is secured.
 *
 * In normal operation, the system runs in level 0 mode while single user
 * and in level 1 mode while multiuser. If level 2 mode is desired while
 * running multiuser, it can be set in the multiuser startup script
 * (/etc/rc.local) using sysctl(1). If it is desired to run the system
 * in level 0 mode while multiuser, initialize the variable securelevel
 * in /sys/kern/kern_sysctl.c to -1. Note that it is NOT initialized to
 * zero as that would allow the vmunix binary to be patched to -1.
 * Without initialization, securelevel loads in the BSS area which only
 * comes into existence when the kernel is loaded and hence cannot be
 * patched by a stalking hacker.
 */

#ifndef _SYS_SYSTM_H_
#define	_SYS_SYSTM_H_

#include <sys/appleapiopts.h>
#include <sys/cdefs.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/ioctl.h>
#include <sys/malloc.h>
#ifdef BSD_KERNEL_PRIVATE
#include <sys/tty.h>
#include <sys/vm.h>
#endif
#include <sys/proc.h>
__BEGIN_DECLS
#ifdef KERNEL
#include <libkern/libkern.h>
#endif
#include <kern/thread.h>
#include <kern/debug.h>
__END_DECLS

#ifdef BSD_KERNEL_PRIVATE
extern char version[];			/* system version */
extern const char copyright[];		/* system copyright */


extern int	boothowto;	/* reboot flags, from console subsystem */
extern int	show_space;
extern int	minimalboot;
#if CONFIG_EMBEDDED
extern int	darkboot;
#endif

extern const int nblkdev; /* number of entries in bdevsw */
extern const int nchrdev; /* number of entries in cdevsw */
#endif /* BSD_KERNEL_PRIVATE */

#ifdef KERNEL_PRIVATE

extern int securelevel;		/* system security level */
extern dev_t rootdev;		/* root device */
extern struct vnode *rootvp;	/* vnode equivalent to above */

#endif /* KERNEL_PRIVATE */

#define SYSINIT(a,b,c,d,e)
#define MALLOC_DEFINE(a,b,c)

#define getenv_int(a,b) (*b = 0)
#define	KASSERT(exp,msg)
/*
 * General function declarations.
 */
__BEGIN_DECLS

#ifdef BSD_KERNEL_PRIVATE
int	einval(void);
void	nullsys(void);
int	errsys(void);
int	seltrue(dev_t dev, int which, struct proc *p);
void	ttyprintf(struct tty *, const char *, ...) __printflike(2, 3);
void	realitexpire(struct proc *);
int	hzto(struct timeval *tv);
void	tablefull(const char *);
int	kvprintf(char const *, void (*)(int, void*), void *, int,
		      __darwin_va_list) __printflike(1,0);
void	uprintf(const char *, ...) __printflike(1,2);
int	copywithin(void *saddr, void *daddr, size_t len);
int64_t	fulong(user_addr_t addr);
int	sulong(user_addr_t addr, int64_t longword);
uint64_t fuulong(user_addr_t addr);
int	suulong(user_addr_t addr, uint64_t ulongword);
int	clone_system_shared_regions(int shared_regions_active,
				    int chain_regions,
				    int base_vnode);
extern kern_return_t bsd_exception(int, mach_exception_data_t codes, int);
extern void	bsdinit_task(void);
extern void unix_syscall_return(int) __dead2;
void	initclocks(void);
void	startprofclock(struct proc *);
void	stopprofclock(struct proc *);
void	setstatclockrate(int hzrate);
struct time_value;
void	get_procrustime(struct time_value *tv);
void	load_init_program(struct proc *p);
void __pthread_testcancel(int presyscall);
void throttle_info_get_last_io_time(mount_t mp, struct timeval *tv);
void update_last_io_time(mount_t mp);
void throttle_info_end_io(buf_t bp);
#endif /* BSD_KERNEL_PRIVATE */

#ifdef KERNEL_PRIVATE
void	timeout(void (*)(void *), void *arg, int ticks);
void	timeout_with_leeway(void (*)(void *), void *arg, int ticks, int leeway_ticks);
void	untimeout(void (*)(void *), void *arg);
int  	bsd_hostname(char *, int, int*);
int	vslock(user_addr_t addr, user_size_t len);
int	vsunlock(user_addr_t addr, user_size_t len, int dirtied);
#endif /* KERNEL_PRIVATE */

int	nullop(void);
int	nulldev(void);
int	enoioctl(void);
int	enosys(void);
int	enxio(void);
int	eopnotsupp(void);
void	*hashinit(int count, int type, u_long *hashmask);
void	ovbcopy(const void *from, void *to, size_t len);
int	fubyte(user_addr_t addr);
int	fuibyte(user_addr_t addr);
int	subyte(user_addr_t addr, int byte);
int	suibyte(user_addr_t addr, int byte);
long   fuword(user_addr_t addr);
long   fuiword(user_addr_t addr);
int    suword(user_addr_t addr, long word);
int    suiword(user_addr_t addr, long word);
#define fusize(_a)	((user_size_t)fulong(_a))
#define susize(_a, _s)	sulong((_a), (_s))
#define fuptr(a)	((user_addr_t)fulong(_a)
#define suptr(_a, _p)	sulong((_a), (_p))
int	useracc(user_addr_t addr, user_size_t len,int prot);
typedef void (*timeout_fcn_t)(void *);
void	bsd_timeout(void (*)(void *), void *arg, struct timespec * ts);
void	bsd_untimeout(void (*)(void *), void *arg);
void	set_fsblocksize(struct vnode *);
uint64_t tvtoabstime(struct timeval *);
uint64_t tstoabstime(struct timespec *);
void	*throttle_info_create(void);
void	throttle_info_mount_ref(mount_t mp, void * throttle_info);
void	throttle_info_mount_rel(mount_t mp);
void	throttle_info_release(void *throttle_info);
void	throttle_info_update(void *throttle_info, int flags);
uint32_t throttle_lowpri_io(int sleep_amount);
void	throttle_set_thread_io_policy(int policy);

typedef struct __throttle_info_handle *throttle_info_handle_t;
int	throttle_info_ref_by_mask(uint64_t throttle_mask, throttle_info_handle_t *throttle_info_handle);
void	throttle_info_rel_by_mask(throttle_info_handle_t throttle_info_handle);
void	throttle_info_update_by_mask(void *throttle_info_handle, int flags);
void 	throttle_info_disable_throttle(int devno, boolean_t isfusion);
/*
 * 'throttle_info_handle' acquired via 'throttle_info_ref_by_mask'
 * 'policy' should be specified as either IOPOL_UTILITY or IPOL_THROTTLE,
 * all other values will be treated as IOPOL_NORMAL (i.e. no throttling)
 */
int	throttle_info_io_will_be_throttled(void *throttle_info_handle, int policy);

#ifdef KERNEL_PRIVATE

/* returned by throttle_io_will_be_throttled */
#define THROTTLE_DISENGAGED	0
#define THROTTLE_ENGAGED	1
#define THROTTLE_NOW		2

int  throttle_io_will_be_throttled(int lowpri_window_msecs, mount_t mp);
int throttle_lowpri_window(void) __attribute__((pure));
struct uthread;
void throttle_info_reset_window(struct uthread *ut);

#endif

#ifdef XNU_KERNEL_PRIVATE
void *exec_spawnattr_getmacpolicyinfo(const void *macextensions, const char *policyname, size_t *lenp);
#endif

#ifdef BSD_KERNEL_PRIVATE

#define THROTTLE_IO_ENABLE	1
#define THROTTLE_IO_DISABLE	0
void sys_override_io_throttle(int flag);

#endif /* BSD_KERNEL_PRIVATE */

__END_DECLS

#endif /* !_SYS_SYSTM_H_ */
Commit	Line	Data
1c79356b	1	/*
2d21ac55	2	* Copyright (c) 2000-2007 Apple Inc. All rights reserved.
5d5c5d0d	3	*
2d21ac55	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
1c79356b	5	*
2d21ac55 A	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
8f6c56a5	14	*
2d21ac55 A	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
8f6c56a5 A	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
8f6c56a5 A	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
2d21ac55 A	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
8f6c56a5	25	*
2d21ac55	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
1c79356b A	27	*/
	28	/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
	29	/*-
	30	* Copyright (c) 1982, 1988, 1991, 1993
	31	* The Regents of the University of California. All rights reserved.
	32	* (c) UNIX System Laboratories, Inc.
	33	* All or some portions of this file are derived from material licensed
	34	* to the University of California by American Telephone and Telegraph
	35	* Co. or Unix System Laboratories, Inc. and are reproduced herein with
	36	* the permission of UNIX System Laboratories, Inc.
	37	*
	38	* Redistribution and use in source and binary forms, with or without
	39	* modification, are permitted provided that the following conditions
	40	* are met:
	41	* 1. Redistributions of source code must retain the above copyright
	42	* notice, this list of conditions and the following disclaimer.
	43	* 2. Redistributions in binary form must reproduce the above copyright
	44	* notice, this list of conditions and the following disclaimer in the
	45	* documentation and/or other materials provided with the distribution.
	46	* 3. All advertising materials mentioning features or use of this software
	47	* must display the following acknowledgement:
	48	* This product includes software developed by the University of
	49	* California, Berkeley and its contributors.
	50	* 4. Neither the name of the University nor the names of its contributors
	51	* may be used to endorse or promote products derived from this software
	52	* without specific prior written permission.
	53	*
	54	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	55	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	56	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	57	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	58	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	59	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	60	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	61	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	62	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	63	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	64	* SUCH DAMAGE.
	65	*
	66	* @(#)systm.h 8.7 (Berkeley) 3/29/95
	67	*/
	68
	69	/*
	70	* The `securelevel' variable controls the security level of the system.
	71	* It can only be decreased by process 1 (/sbin/init).
	72	*
	73	* Security levels are as follows:
	74	* -1 permannently insecure mode - always run system in level 0 mode.
	75	* 0 insecure mode - immutable and append-only flags make be turned off.
	76	* All devices may be read or written subject to permission modes.
	77	* 1 secure mode - immutable and append-only flags may not be changed;
	78	* raw disks of mounted filesystems, /dev/mem, and /dev/kmem are
	79	* read-only.
	80	* 2 highly secure mode - same as (1) plus raw disks are always
	81	* read-only whether mounted or not. This level precludes tampering
	82	* with filesystems by unmounting them, but also inhibits running
	83	* newfs while the system is secured.
	84	*
	85	* In normal operation, the system runs in level 0 mode while single user
	86	* and in level 1 mode while multiuser. If level 2 mode is desired while
	87	* running multiuser, it can be set in the multiuser startup script
	88	* (/etc/rc.local) using sysctl(1). If it is desired to run the system
	89	* in level 0 mode while multiuser, initialize the variable securelevel
	90	* in /sys/kern/kern_sysctl.c to -1. Note that it is NOT initialized to
91	* zero as that would allow the vmunix binary to be patched to -1.
92	* Without initialization, securelevel loads in the BSS area which only
93	* comes into existence when the kernel is loaded and hence cannot be
94	* patched by a stalking hacker.
95	*/
96
97	#ifndef _SYS_SYSTM_H_
98	#define _SYS_SYSTM_H_
99
9bccf70c	100	#include <sys/appleapiopts.h>
1c79356b	101	#include <sys/cdefs.h>
1c79356b A	102	#include <sys/types.h>
1c79356b A	103	#include <sys/time.h>
91447636 A	104	#include <sys/ioctl.h>
	105	#include <sys/malloc.h>
	106	#ifdef BSD_KERNEL_PRIVATE
1c79356b A	107	#include <sys/tty.h>
1c79356b A	108	#include <sys/vm.h>
91447636 A	109	#endif
91447636 A	110	#include <sys/proc.h>
1c79356b	111	__BEGIN_DECLS
91447636 A	112	#ifdef KERNEL
	113	#include <libkern/libkern.h>
	114	#endif
1c79356b	115	#include <kern/thread.h>
91447636	116	#include <kern/debug.h>
1c79356b A	117	__END_DECLS
1c79356b A	118
91447636	119	#ifdef BSD_KERNEL_PRIVATE
b0d623f7 A	120	extern char version[]; /* system version */
b0d623f7 A	121	extern const char copyright[]; /* system copyright */
1c79356b	122
1c79356b	123
1c79356b A	124	extern int boothowto; /* reboot flags, from console subsystem */
1c79356b A	125	extern int show_space;
3e170ce0	126	extern int minimalboot;
5ba3f43e A	127	#if CONFIG_EMBEDDED
	128	extern int darkboot;
	129	#endif
1c79356b	130
39037602 A	131	extern const int nblkdev; /* number of entries in bdevsw */
39037602 A	132	extern const int nchrdev; /* number of entries in cdevsw */
91447636	133	#endif /* BSD_KERNEL_PRIVATE */
9bccf70c	134
91447636	135	#ifdef KERNEL_PRIVATE
9bccf70c	136
91447636 A	137	extern int securelevel; /* system security level */
	138	extern dev_t rootdev; /* root device */
	139	extern struct vnode rootvp; / vnode equivalent to above */
b0d623f7	140
91447636	141	#endif /* KERNEL_PRIVATE */
1c79356b A	142
	143	#define SYSINIT(a,b,c,d,e)
	144	#define MALLOC_DEFINE(a,b,c)
	145
1c79356b A	146	#define getenv_int(a,b) (*b = 0)
1c79356b A	147	#define KASSERT(exp,msg)
1c79356b A	148	/*
	149	* General function declarations.
	150	*/
	151	__BEGIN_DECLS
91447636 A	152
91447636 A	153	#ifdef BSD_KERNEL_PRIVATE
b0d623f7 A	154	int einval(void);
	155	void nullsys(void);
	156	int errsys(void);
91447636	157	int seltrue(dev_t dev, int which, struct proc *p);
b0d623f7	158	void ttyprintf(struct tty , const char , ...) __printflike(2, 3);
2d21ac55	159	void realitexpire(struct proc *);
91447636	160	int hzto(struct timeval *tv);
91447636	161	void tablefull(const char *);
91447636	162	int kvprintf(char const , void ()(int, void), void , int,
5ba3f43e	163	__darwin_va_list) __printflike(1,0);
2d21ac55	164	void uprintf(const char *, ...) __printflike(1,2);
91447636	165	int copywithin(void saddr, void daddr, size_t len);
91447636 A	166	int64_t fulong(user_addr_t addr);
	167	int sulong(user_addr_t addr, int64_t longword);
	168	uint64_t fuulong(user_addr_t addr);
	169	int suulong(user_addr_t addr, uint64_t ulongword);
91447636 A	170	int clone_system_shared_regions(int shared_regions_active,
	171	int chain_regions,
	172	int base_vnode);
2d21ac55	173	extern kern_return_t bsd_exception(int, mach_exception_data_t codes, int);
91447636	174	extern void bsdinit_task(void);
2d21ac55	175	extern void unix_syscall_return(int) __dead2;
91447636	176	void initclocks(void);
91447636 A	177	void startprofclock(struct proc *);
	178	void stopprofclock(struct proc *);
	179	void setstatclockrate(int hzrate);
91447636 A	180	struct time_value;
91447636 A	181	void get_procrustime(struct time_value *tv);
91447636	182	void load_init_program(struct proc *p);
2d21ac55	183	void __pthread_testcancel(int presyscall);
e2fac8b1 A	184	void throttle_info_get_last_io_time(mount_t mp, struct timeval *tv);
e2fac8b1 A	185	void update_last_io_time(mount_t mp);
39037602	186	void throttle_info_end_io(buf_t bp);
91447636	187	#endif /* BSD_KERNEL_PRIVATE */
1c79356b	188
b0d623f7 A	189	#ifdef KERNEL_PRIVATE
b0d623f7 A	190	void timeout(void ()(void ), void *arg, int ticks);
39236c6e	191	void timeout_with_leeway(void ()(void ), void *arg, int ticks, int leeway_ticks);
b0d623f7 A	192	void untimeout(void ()(void ), void *arg);
b0d623f7 A	193	int bsd_hostname(char , int, int);
39037602 A	194	int vslock(user_addr_t addr, user_size_t len);
39037602 A	195	int vsunlock(user_addr_t addr, user_size_t len, int dirtied);
b0d623f7	196	#endif /* KERNEL_PRIVATE */
1c79356b	197
b0d623f7 A	198	int nullop(void);
	199	int nulldev(void);
	200	int enoioctl(void);
	201	int enosys(void);
	202	int enxio(void);
	203	int eopnotsupp(void);
	204	void hashinit(int count, int type, u_long hashmask);
	205	void ovbcopy(const void from, void to, size_t len);
	206	int fubyte(user_addr_t addr);
	207	int fuibyte(user_addr_t addr);
	208	int subyte(user_addr_t addr, int byte);
	209	int suibyte(user_addr_t addr, int byte);
	210	long fuword(user_addr_t addr);
	211	long fuiword(user_addr_t addr);
	212	int suword(user_addr_t addr, long word);
	213	int suiword(user_addr_t addr, long word);
	214	#define fusize(_a) ((user_size_t)fulong(_a))
	215	#define susize(_a, _s) sulong((_a), (_s))
	216	#define fuptr(a) ((user_addr_t)fulong(_a)
	217	#define suptr(_a, _p) sulong((_a), (_p))
	218	int useracc(user_addr_t addr, user_size_t len,int prot);
	219	typedef void (timeout_fcn_t)(void );
	220	void bsd_timeout(void ()(void ), void arg, struct timespec ts);
	221	void bsd_untimeout(void ()(void ), void *arg);
	222	void set_fsblocksize(struct vnode *);
	223	uint64_t tvtoabstime(struct timeval *);
4bd07ac2	224	uint64_t tstoabstime(struct timespec *);
b0d623f7	225	void *throttle_info_create(void);
6d2010ae A	226	void throttle_info_mount_ref(mount_t mp, void * throttle_info);
6d2010ae A	227	void throttle_info_mount_rel(mount_t mp);
b0d623f7 A	228	void throttle_info_release(void *throttle_info);
b0d623f7 A	229	void throttle_info_update(void *throttle_info, int flags);
6d2010ae A	230	uint32_t throttle_lowpri_io(int sleep_amount);
6d2010ae A	231	void throttle_set_thread_io_policy(int policy);
316670eb	232
6d2010ae	233	typedef struct __throttle_info_handle *throttle_info_handle_t;
316670eb	234	int throttle_info_ref_by_mask(uint64_t throttle_mask, throttle_info_handle_t *throttle_info_handle);
6d2010ae A	235	void throttle_info_rel_by_mask(throttle_info_handle_t throttle_info_handle);
6d2010ae A	236	void throttle_info_update_by_mask(void *throttle_info_handle, int flags);
3e170ce0	237	void throttle_info_disable_throttle(int devno, boolean_t isfusion);
316670eb A	238	/*
	239	* 'throttle_info_handle' acquired via 'throttle_info_ref_by_mask'
	240	* 'policy' should be specified as either IOPOL_UTILITY or IPOL_THROTTLE,
	241	* all other values will be treated as IOPOL_NORMAL (i.e. no throttling)
	242	*/
	243	int throttle_info_io_will_be_throttled(void *throttle_info_handle, int policy);
	244
39037602 A	245	#ifdef KERNEL_PRIVATE
	246
	247	/* returned by throttle_io_will_be_throttled */
	248	#define THROTTLE_DISENGAGED 0
	249	#define THROTTLE_ENGAGED 1
	250	#define THROTTLE_NOW 2
	251
	252	int throttle_io_will_be_throttled(int lowpri_window_msecs, mount_t mp);
	253	int throttle_lowpri_window(void) __attribute__((pure));
	254	struct uthread;
	255	void throttle_info_reset_window(struct uthread *ut);
	256
	257	#endif
	258
39236c6e A	259	#ifdef XNU_KERNEL_PRIVATE
	260	void exec_spawnattr_getmacpolicyinfo(const void macextensions, const char policyname, size_t lenp);
	261	#endif
	262
	263	#ifdef BSD_KERNEL_PRIVATE
	264
	265	#define THROTTLE_IO_ENABLE 1
	266	#define THROTTLE_IO_DISABLE 0
	267	void sys_override_io_throttle(int flag);
	268
	269	#endif /* BSD_KERNEL_PRIVATE */
	270
1c79356b A	271	__END_DECLS
	272
	273	#endif /* !_SYS_SYSTM_H_ */