| | 1 | /* |
| | 2 | * Copyright (c) 2000-2007 Apple Inc. All rights reserved. |
| | 3 | * |
| | 4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
| | 5 | * |
| | 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. |
| | 14 | * |
| | 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 |
| | 20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 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. |
| | 25 | * |
| | 26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
| | 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 | |
| | 100 | #include <sys/appleapiopts.h> |
| | 101 | #include <sys/cdefs.h> |
| | 102 | #include <sys/types.h> |
| | 103 | #include <sys/time.h> |
| | 104 | #include <sys/ioctl.h> |
| | 105 | #include <sys/malloc.h> |
| | 106 | #ifdef BSD_KERNEL_PRIVATE |
| | 107 | #include <sys/tty.h> |
| | 108 | #include <sys/vm.h> |
| | 109 | #endif |
| | 110 | #include <sys/proc.h> |
| | 111 | __BEGIN_DECLS |
| | 112 | #ifdef KERNEL |
| | 113 | #include <libkern/libkern.h> |
| | 114 | #endif |
| | 115 | #include <kern/thread.h> |
| | 116 | #include <kern/debug.h> |
| | 117 | __END_DECLS |
| | 118 | |
| | 119 | #ifdef BSD_KERNEL_PRIVATE |
| | 120 | extern char version[]; /* system version */ |
| | 121 | extern const char copyright[]; /* system copyright */ |
| | 122 | |
| | 123 | |
| | 124 | extern int boothowto; /* reboot flags, from console subsystem */ |
| | 125 | extern int show_space; |
| | 126 | extern int minimalboot; |
| | 127 | |
| | 128 | extern const int nblkdev; /* number of entries in bdevsw */ |
| | 129 | extern const int nchrdev; /* number of entries in cdevsw */ |
| | 130 | #endif /* BSD_KERNEL_PRIVATE */ |
| | 131 | |
| | 132 | #ifdef KERNEL_PRIVATE |
| | 133 | |
| | 134 | extern int securelevel; /* system security level */ |
| | 135 | extern dev_t rootdev; /* root device */ |
| | 136 | extern struct vnode *rootvp; /* vnode equivalent to above */ |
| | 137 | |
| | 138 | #endif /* KERNEL_PRIVATE */ |
| | 139 | |
| | 140 | #define SYSINIT(a,b,c,d,e) |
| | 141 | #define MALLOC_DEFINE(a,b,c) |
| | 142 | |
| | 143 | #define getenv_int(a,b) (*b = 0) |
| | 144 | #define KASSERT(exp,msg) |
| | 145 | /* |
| | 146 | * General function declarations. |
| | 147 | */ |
| | 148 | __BEGIN_DECLS |
| | 149 | |
| | 150 | #ifdef BSD_KERNEL_PRIVATE |
| | 151 | int einval(void); |
| | 152 | void nullsys(void); |
| | 153 | int errsys(void); |
| | 154 | int seltrue(dev_t dev, int which, struct proc *p); |
| | 155 | void ttyprintf(struct tty *, const char *, ...) __printflike(2, 3); |
| | 156 | void realitexpire(struct proc *); |
| | 157 | int hzto(struct timeval *tv); |
| | 158 | void tablefull(const char *); |
| | 159 | int kvprintf(char const *, void (*)(int, void*), void *, int, |
| | 160 | __darwin_va_list); |
| | 161 | void uprintf(const char *, ...) __printflike(1,2); |
| | 162 | int copywithin(void *saddr, void *daddr, size_t len); |
| | 163 | int64_t fulong(user_addr_t addr); |
| | 164 | int sulong(user_addr_t addr, int64_t longword); |
| | 165 | uint64_t fuulong(user_addr_t addr); |
| | 166 | int suulong(user_addr_t addr, uint64_t ulongword); |
| | 167 | int clone_system_shared_regions(int shared_regions_active, |
| | 168 | int chain_regions, |
| | 169 | int base_vnode); |
| | 170 | extern kern_return_t bsd_exception(int, mach_exception_data_t codes, int); |
| | 171 | extern void bsdinit_task(void); |
| | 172 | extern void unix_syscall_return(int) __dead2; |
| | 173 | void initclocks(void); |
| | 174 | void startprofclock(struct proc *); |
| | 175 | void stopprofclock(struct proc *); |
| | 176 | void setstatclockrate(int hzrate); |
| | 177 | struct time_value; |
| | 178 | void get_procrustime(struct time_value *tv); |
| | 179 | void load_init_program(struct proc *p); |
| | 180 | void __pthread_testcancel(int presyscall); |
| | 181 | void throttle_info_get_last_io_time(mount_t mp, struct timeval *tv); |
| | 182 | void update_last_io_time(mount_t mp); |
| | 183 | void throttle_info_end_io(buf_t bp); |
| | 184 | #endif /* BSD_KERNEL_PRIVATE */ |
| | 185 | |
| | 186 | #ifdef KERNEL_PRIVATE |
| | 187 | void timeout(void (*)(void *), void *arg, int ticks); |
| | 188 | void timeout_with_leeway(void (*)(void *), void *arg, int ticks, int leeway_ticks); |
| | 189 | void untimeout(void (*)(void *), void *arg); |
| | 190 | int bsd_hostname(char *, int, int*); |
| | 191 | int vslock(user_addr_t addr, user_size_t len); |
| | 192 | int vsunlock(user_addr_t addr, user_size_t len, int dirtied); |
| | 193 | #endif /* KERNEL_PRIVATE */ |
| | 194 | |
| | 195 | int nullop(void); |
| | 196 | int nulldev(void); |
| | 197 | int enoioctl(void); |
| | 198 | int enosys(void); |
| | 199 | int enxio(void); |
| | 200 | int eopnotsupp(void); |
| | 201 | void *hashinit(int count, int type, u_long *hashmask); |
| | 202 | void ovbcopy(const void *from, void *to, size_t len); |
| | 203 | int fubyte(user_addr_t addr); |
| | 204 | int fuibyte(user_addr_t addr); |
| | 205 | int subyte(user_addr_t addr, int byte); |
| | 206 | int suibyte(user_addr_t addr, int byte); |
| | 207 | long fuword(user_addr_t addr); |
| | 208 | long fuiword(user_addr_t addr); |
| | 209 | int suword(user_addr_t addr, long word); |
| | 210 | int suiword(user_addr_t addr, long word); |
| | 211 | #define fusize(_a) ((user_size_t)fulong(_a)) |
| | 212 | #define susize(_a, _s) sulong((_a), (_s)) |
| | 213 | #define fuptr(a) ((user_addr_t)fulong(_a) |
| | 214 | #define suptr(_a, _p) sulong((_a), (_p)) |
| | 215 | int useracc(user_addr_t addr, user_size_t len,int prot); |
| | 216 | typedef void (*timeout_fcn_t)(void *); |
| | 217 | void bsd_timeout(void (*)(void *), void *arg, struct timespec * ts); |
| | 218 | void bsd_untimeout(void (*)(void *), void *arg); |
| | 219 | void set_fsblocksize(struct vnode *); |
| | 220 | uint64_t tvtoabstime(struct timeval *); |
| | 221 | uint64_t tstoabstime(struct timespec *); |
| | 222 | void *throttle_info_create(void); |
| | 223 | void throttle_info_mount_ref(mount_t mp, void * throttle_info); |
| | 224 | void throttle_info_mount_rel(mount_t mp); |
| | 225 | void throttle_info_release(void *throttle_info); |
| | 226 | void throttle_info_update(void *throttle_info, int flags); |
| | 227 | uint32_t throttle_lowpri_io(int sleep_amount); |
| | 228 | void throttle_set_thread_io_policy(int policy); |
| | 229 | |
| | 230 | typedef struct __throttle_info_handle *throttle_info_handle_t; |
| | 231 | int throttle_info_ref_by_mask(uint64_t throttle_mask, throttle_info_handle_t *throttle_info_handle); |
| | 232 | void throttle_info_rel_by_mask(throttle_info_handle_t throttle_info_handle); |
| | 233 | void throttle_info_update_by_mask(void *throttle_info_handle, int flags); |
| | 234 | void throttle_info_disable_throttle(int devno, boolean_t isfusion); |
| | 235 | /* |
| | 236 | * 'throttle_info_handle' acquired via 'throttle_info_ref_by_mask' |
| | 237 | * 'policy' should be specified as either IOPOL_UTILITY or IPOL_THROTTLE, |
| | 238 | * all other values will be treated as IOPOL_NORMAL (i.e. no throttling) |
| | 239 | */ |
| | 240 | int throttle_info_io_will_be_throttled(void *throttle_info_handle, int policy); |
| | 241 | |
| | 242 | #ifdef KERNEL_PRIVATE |
| | 243 | |
| | 244 | /* returned by throttle_io_will_be_throttled */ |
| | 245 | #define THROTTLE_DISENGAGED 0 |
| | 246 | #define THROTTLE_ENGAGED 1 |
| | 247 | #define THROTTLE_NOW 2 |
| | 248 | |
| | 249 | int throttle_io_will_be_throttled(int lowpri_window_msecs, mount_t mp); |
| | 250 | int throttle_lowpri_window(void) __attribute__((pure)); |
| | 251 | struct uthread; |
| | 252 | void throttle_info_reset_window(struct uthread *ut); |
| | 253 | |
| | 254 | #endif |
| | 255 | |
| | 256 | #ifdef XNU_KERNEL_PRIVATE |
| | 257 | void *exec_spawnattr_getmacpolicyinfo(const void *macextensions, const char *policyname, size_t *lenp); |
| | 258 | #endif |
| | 259 | |
| | 260 | #ifdef BSD_KERNEL_PRIVATE |
| | 261 | |
| | 262 | #define THROTTLE_IO_ENABLE 1 |
| | 263 | #define THROTTLE_IO_DISABLE 0 |
| | 264 | void sys_override_io_throttle(int flag); |
| | 265 | |
| | 266 | #endif /* BSD_KERNEL_PRIVATE */ |
| | 267 | |
| | 268 | __END_DECLS |
| | 269 | |
| | 270 | #endif /* !_SYS_SYSTM_H_ */ |
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