274 lines
11 KiB
C
274 lines
11 KiB
C
/*
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* Copyright (c) 2000-2007 Apple Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
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/*-
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* Copyright (c) 1982, 1988, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)systm.h 8.7 (Berkeley) 3/29/95
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*/
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/*
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* The `securelevel' variable controls the security level of the system.
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* It can only be decreased by process 1 (/sbin/init).
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*
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* Security levels are as follows:
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* -1 permannently insecure mode - always run system in level 0 mode.
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* 0 insecure mode - immutable and append-only flags make be turned off.
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* All devices may be read or written subject to permission modes.
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* 1 secure mode - immutable and append-only flags may not be changed;
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* raw disks of mounted filesystems, /dev/mem, and /dev/kmem are
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* read-only.
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* 2 highly secure mode - same as (1) plus raw disks are always
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* read-only whether mounted or not. This level precludes tampering
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* with filesystems by unmounting them, but also inhibits running
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* newfs while the system is secured.
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*
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* In normal operation, the system runs in level 0 mode while single user
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* and in level 1 mode while multiuser. If level 2 mode is desired while
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* running multiuser, it can be set in the multiuser startup script
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* (/etc/rc.local) using sysctl(1). If it is desired to run the system
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* in level 0 mode while multiuser, initialize the variable securelevel
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* in /sys/kern/kern_sysctl.c to -1. Note that it is NOT initialized to
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* zero as that would allow the vmunix binary to be patched to -1.
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* Without initialization, securelevel loads in the BSS area which only
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* comes into existence when the kernel is loaded and hence cannot be
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* patched by a stalking hacker.
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*/
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#ifndef _SYS_SYSTM_H_
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#define _SYS_SYSTM_H_
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#include <sys/appleapiopts.h>
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/ioctl.h>
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#include <sys/malloc.h>
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#ifdef BSD_KERNEL_PRIVATE
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#include <sys/tty.h>
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#include <sys/vm.h>
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#endif
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#include <sys/proc.h>
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__BEGIN_DECLS
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#ifdef KERNEL
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#include <libkern/libkern.h>
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#endif
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#include <kern/thread.h>
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#include <kern/debug.h>
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__END_DECLS
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#ifdef BSD_KERNEL_PRIVATE
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extern char version[]; /* system version */
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extern const char *const copyright; /* system copyright */
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extern int boothowto; /* reboot flags, from console subsystem */
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extern int show_space;
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extern int minimalboot;
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#if CONFIG_DARKBOOT
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extern int darkboot;
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#endif
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extern const int nblkdev; /* number of entries in bdevsw */
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extern const int nchrdev; /* number of entries in cdevsw */
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#endif /* BSD_KERNEL_PRIVATE */
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#ifdef KERNEL_PRIVATE
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extern int securelevel; /* system security level */
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extern dev_t rootdev; /* root device */
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extern struct vnode *rootvp; /* vnode equivalent to above */
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#endif /* KERNEL_PRIVATE */
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#define SYSINIT(a, b, c, d, e)
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#define MALLOC_DEFINE(a, b, c)
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#define getenv_int(a, b) (*b = 0)
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#define KASSERT(exp, msg)
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/*
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* General function declarations.
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*/
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__BEGIN_DECLS
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#ifdef BSD_KERNEL_PRIVATE
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int einval(void);
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void nullsys(void);
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int errsys(void);
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int seltrue(dev_t dev, int which, struct proc *p);
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void ttyprintf(struct tty *, const char *, ...) __printflike(2, 3);
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void realitexpire(struct proc *, void*);
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int hzto(struct timeval *tv);
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void tablefull(const char *);
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void uprintf(const char *, ...) __printflike(1, 2);
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int copywithin(void *saddr, void *daddr, size_t len);
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int64_t fulong(user_addr_t addr);
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int sulong(user_addr_t addr, int64_t longword);
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uint64_t fuulong(user_addr_t addr);
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int suulong(user_addr_t addr, uint64_t ulongword);
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int clone_system_shared_regions(int shared_regions_active,
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int chain_regions,
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int base_vnode);
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extern kern_return_t bsd_exception(int, mach_exception_data_t codes, int);
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extern void bsdinit_task(void);
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extern void unix_syscall_return(int) __dead2;
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void initclocks(void);
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void startprofclock(struct proc *);
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void stopprofclock(struct proc *);
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void setstatclockrate(int hzrate);
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struct time_value;
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void get_procrustime(struct time_value *tv);
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void load_init_program(struct proc *p);
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void __pthread_testcancel(int presyscall);
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void throttle_info_get_last_io_time(mount_t mp, struct timeval *tv);
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void update_last_io_time(mount_t mp);
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void throttle_info_end_io(buf_t bp);
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#endif /* BSD_KERNEL_PRIVATE */
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#ifdef KERNEL_PRIVATE
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void timeout(void (*)(void *), void *arg, int ticks);
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void timeout_with_leeway(void (*)(void *), void *arg, int ticks, int leeway_ticks);
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void untimeout(void (*)(void *), void *arg);
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int bsd_hostname(char *, size_t, size_t*);
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int vslock(user_addr_t addr, user_size_t len);
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int vsunlock(user_addr_t addr, user_size_t len, int dirtied);
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#endif /* KERNEL_PRIVATE */
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int nullop(void);
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int nulldev(void);
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int enoioctl(void);
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int enosys(void);
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int enxio(void);
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int eopnotsupp(void);
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void *hashinit(int count, int type, u_long *hashmask);
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void hashdestroy(void *, int type, u_long hashmask);
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void ovbcopy(const void *from, void *to, size_t len);
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int fubyte(user_addr_t addr);
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int fuibyte(user_addr_t addr);
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int subyte(user_addr_t addr, int byte);
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int suibyte(user_addr_t addr, int byte);
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long fuword(user_addr_t addr);
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long fuiword(user_addr_t addr);
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int suword(user_addr_t addr, long word);
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int suiword(user_addr_t addr, long word);
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#define fusize(_a) ((user_size_t)fulong(_a))
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#define susize(_a, _s) sulong((_a), (_s))
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#define fuptr(a) ((user_addr_t)fulong(_a)
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#define suptr(_a, _p) sulong((_a), (_p))
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int useracc(user_addr_t addr, user_size_t len, int prot);
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typedef void (*timeout_fcn_t)(void *);
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void bsd_timeout(void (*)(void *), void *arg, struct timespec * ts);
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void bsd_untimeout(void (*)(void *), void *arg);
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void set_fsblocksize(struct vnode *);
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uint64_t tvtoabstime(struct timeval *);
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uint64_t tstoabstime(struct timespec *);
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void *throttle_info_create(void);
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void throttle_info_mount_ref(mount_t mp, void * throttle_info);
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void throttle_info_mount_rel(mount_t mp);
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void throttle_info_release(void *throttle_info);
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void throttle_info_update(void *throttle_info, int flags);
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uint32_t throttle_lowpri_io(int sleep_amount);
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/* returns TRUE if the throttle_lowpri_io called with the same sleep_amount would've slept */
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int throttle_lowpri_io_will_be_throttled(int sleep_amount);
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void throttle_set_thread_io_policy(int policy);
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int throttle_get_thread_effective_io_policy(void);
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int throttle_thread_io_tier_above_metadata(void);
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typedef struct __throttle_info_handle *throttle_info_handle_t;
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int throttle_info_ref_by_mask(uint64_t throttle_mask, throttle_info_handle_t *throttle_info_handle);
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void throttle_info_rel_by_mask(throttle_info_handle_t throttle_info_handle);
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void throttle_info_update_by_mask(void *throttle_info_handle, int flags);
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void throttle_info_disable_throttle(int devno, boolean_t isfusion);
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/*
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* 'throttle_info_handle' acquired via 'throttle_info_ref_by_mask'
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* 'policy' should be specified as either IOPOL_UTILITY or IPOL_THROTTLE,
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* all other values will be treated as IOPOL_NORMAL (i.e. no throttling)
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*/
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int throttle_info_io_will_be_throttled(void *throttle_info_handle, int policy);
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#ifdef KERNEL_PRIVATE
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/* returned by throttle_io_will_be_throttled */
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#define THROTTLE_DISENGAGED 0
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#define THROTTLE_ENGAGED 1
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#define THROTTLE_NOW 2
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int throttle_io_will_be_throttled(int lowpri_window_msecs, mount_t mp);
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int throttle_lowpri_window(void) __attribute__((pure));
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struct uthread;
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void throttle_info_reset_window(struct uthread *ut);
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#endif
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#ifdef XNU_KERNEL_PRIVATE
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void *exec_spawnattr_getmacpolicyinfo(const void *macextensions, const char *policyname, size_t *lenp);
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#endif
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#ifdef BSD_KERNEL_PRIVATE
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void sys_override_io_throttle(boolean_t enable_override);
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#endif /* BSD_KERNEL_PRIVATE */
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__END_DECLS
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#endif /* !_SYS_SYSTM_H_ */
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