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 *const copyright; /* system copyright */ |
122 | |
123 | |
124 | extern int boothowto; /* reboot flags, from console subsystem */ |
125 | extern int show_space; |
126 | extern int minimalboot; |
127 | #if CONFIG_DARKBOOT |
128 | extern int darkboot; |
129 | #endif |
130 | |
131 | extern const int nblkdev; /* number of entries in bdevsw */ |
132 | extern const int nchrdev; /* number of entries in cdevsw */ |
133 | #endif /* BSD_KERNEL_PRIVATE */ |
134 | |
135 | #ifdef KERNEL_PRIVATE |
136 | |
137 | extern int securelevel; /* system security level */ |
138 | extern dev_t rootdev; /* root device */ |
139 | extern struct vnode *rootvp; /* vnode equivalent to above */ |
140 | |
141 | #endif /* KERNEL_PRIVATE */ |
142 | |
143 | #define SYSINIT(a, b, c, d, e) |
144 | #define MALLOC_DEFINE(a, b, c) |
145 | |
146 | #define getenv_int(a, b) (*b = 0) |
147 | #define KASSERT(exp, msg) |
148 | /* |
149 | * General function declarations. |
150 | */ |
151 | __BEGIN_DECLS |
152 | |
153 | #ifdef BSD_KERNEL_PRIVATE |
154 | int einval(void); |
155 | void nullsys(void); |
156 | int errsys(void); |
157 | int seltrue(dev_t dev, int which, struct proc *p); |
158 | void ttyprintf(struct tty *, const char *, ...) __printflike(2, 3); |
159 | void realitexpire(struct proc *, void*); |
160 | int hzto(struct timeval *tv); |
161 | void tablefull(const char *); |
162 | void uprintf(const char *, ...) __printflike(1, 2); |
163 | int copywithin(void *saddr, void *daddr, size_t len); |
164 | int64_t fulong(user_addr_t addr); |
165 | int sulong(user_addr_t addr, int64_t longword); |
166 | uint64_t fuulong(user_addr_t addr); |
167 | int suulong(user_addr_t addr, uint64_t ulongword); |
168 | int clone_system_shared_regions(int shared_regions_active, |
169 | int chain_regions, |
170 | int base_vnode); |
171 | extern kern_return_t bsd_exception(int, mach_exception_data_t codes, int); |
172 | extern void bsdinit_task(void); |
173 | extern void unix_syscall_return(int) __dead2; |
174 | void initclocks(void); |
175 | void startprofclock(struct proc *); |
176 | void stopprofclock(struct proc *); |
177 | void setstatclockrate(int hzrate); |
178 | struct time_value; |
179 | void get_procrustime(struct time_value *tv); |
180 | void load_init_program(struct proc *p); |
181 | void __pthread_testcancel(int presyscall); |
182 | void throttle_info_get_last_io_time(mount_t mp, struct timeval *tv); |
183 | void update_last_io_time(mount_t mp); |
184 | void throttle_info_end_io(buf_t bp); |
185 | #endif /* BSD_KERNEL_PRIVATE */ |
186 | |
187 | #ifdef KERNEL_PRIVATE |
188 | void timeout(void (*)(void *), void *arg, int ticks); |
189 | void timeout_with_leeway(void (*)(void *), void *arg, int ticks, int leeway_ticks); |
190 | void untimeout(void (*)(void *), void *arg); |
191 | int bsd_hostname(char *, size_t, size_t*); |
192 | int vslock(user_addr_t addr, user_size_t len); |
193 | int vsunlock(user_addr_t addr, user_size_t len, int dirtied); |
194 | #endif /* KERNEL_PRIVATE */ |
195 | |
196 | int nullop(void); |
197 | int nulldev(void); |
198 | int enoioctl(void); |
199 | int enosys(void); |
200 | int enxio(void); |
201 | int eopnotsupp(void); |
202 | void *hashinit(int count, int type, u_long *hashmask); |
203 | void hashdestroy(void *, int type, u_long hashmask); |
204 | void ovbcopy(const void *from, void *to, size_t len); |
205 | int fubyte(user_addr_t addr); |
206 | int fuibyte(user_addr_t addr); |
207 | int subyte(user_addr_t addr, int byte); |
208 | int suibyte(user_addr_t addr, int byte); |
209 | long fuword(user_addr_t addr); |
210 | long fuiword(user_addr_t addr); |
211 | int suword(user_addr_t addr, long word); |
212 | int suiword(user_addr_t addr, long word); |
213 | #define fusize(_a) ((user_size_t)fulong(_a)) |
214 | #define susize(_a, _s) sulong((_a), (_s)) |
215 | #define fuptr(a) ((user_addr_t)fulong(_a) |
216 | #define suptr(_a, _p) sulong((_a), (_p)) |
217 | int useracc(user_addr_t addr, user_size_t len, int prot); |
218 | typedef void (*timeout_fcn_t)(void *); |
219 | void bsd_timeout(void (*)(void *), void *arg, struct timespec * ts); |
220 | void bsd_untimeout(void (*)(void *), void *arg); |
221 | void set_fsblocksize(struct vnode *); |
222 | uint64_t tvtoabstime(struct timeval *); |
223 | uint64_t tstoabstime(struct timespec *); |
224 | void *throttle_info_create(void); |
225 | void throttle_info_mount_ref(mount_t mp, void * throttle_info); |
226 | void throttle_info_mount_rel(mount_t mp); |
227 | void throttle_info_release(void *throttle_info); |
228 | void throttle_info_update(void *throttle_info, int flags); |
229 | uint32_t throttle_lowpri_io(int sleep_amount); |
230 | /* returns TRUE if the throttle_lowpri_io called with the same sleep_amount would've slept */ |
231 | int throttle_lowpri_io_will_be_throttled(int sleep_amount); |
232 | void throttle_set_thread_io_policy(int policy); |
233 | int throttle_get_thread_effective_io_policy(void); |
234 | int throttle_thread_io_tier_above_metadata(void); |
235 | |
236 | typedef struct __throttle_info_handle *throttle_info_handle_t; |
237 | int throttle_info_ref_by_mask(uint64_t throttle_mask, throttle_info_handle_t *throttle_info_handle); |
238 | void throttle_info_rel_by_mask(throttle_info_handle_t throttle_info_handle); |
239 | void throttle_info_update_by_mask(void *throttle_info_handle, int flags); |
240 | void throttle_info_disable_throttle(int devno, boolean_t isfusion); |
241 | /* |
242 | * 'throttle_info_handle' acquired via 'throttle_info_ref_by_mask' |
243 | * 'policy' should be specified as either IOPOL_UTILITY or IPOL_THROTTLE, |
244 | * all other values will be treated as IOPOL_NORMAL (i.e. no throttling) |
245 | */ |
246 | int throttle_info_io_will_be_throttled(void *throttle_info_handle, int policy); |
247 | |
248 | #ifdef KERNEL_PRIVATE |
249 | |
250 | /* returned by throttle_io_will_be_throttled */ |
251 | #define THROTTLE_DISENGAGED 0 |
252 | #define THROTTLE_ENGAGED 1 |
253 | #define THROTTLE_NOW 2 |
254 | |
255 | int throttle_io_will_be_throttled(int lowpri_window_msecs, mount_t mp); |
256 | int throttle_lowpri_window(void) __attribute__((pure)); |
257 | struct uthread; |
258 | void throttle_info_reset_window(struct uthread *ut); |
259 | |
260 | #endif |
261 | |
262 | #ifdef XNU_KERNEL_PRIVATE |
263 | void *exec_spawnattr_getmacpolicyinfo(const void *macextensions, const char *policyname, size_t *lenp); |
264 | #endif |
265 | |
266 | #ifdef BSD_KERNEL_PRIVATE |
267 | |
268 | void sys_override_io_throttle(boolean_t enable_override); |
269 | |
270 | #endif /* BSD_KERNEL_PRIVATE */ |
271 | |
272 | __END_DECLS |
273 | |
274 | #endif /* !_SYS_SYSTM_H_ */ |
275 | |