osfmk/ipc/ipc_init.c

   1 /*
   2  * Copyright (c) 2000-2012 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
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   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,
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  23  * Please see the License for the specific language governing rights and
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  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * @OSF_COPYRIGHT@
  30  */
  31 /*
  32  * Mach Operating System
  33  * Copyright (c) 1991,1990,1989 Carnegie Mellon University
  34  * All Rights Reserved.
  35  *
  36  * Permission to use, copy, modify and distribute this software and its
  37  * documentation is hereby granted, provided that both the copyright
  38  * notice and this permission notice appear in all copies of the
  39  * software, derivative works or modified versions, and any portions
  40  * thereof, and that both notices appear in supporting documentation.
  41  *
  42  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  43  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  44  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  45  *
  46  * Carnegie Mellon requests users of this software to return to
  47  *
  48  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  49  *  School of Computer Science
  50  *  Carnegie Mellon University
  51  *  Pittsburgh PA 15213-3890
  52  *
  53  * any improvements or extensions that they make and grant Carnegie Mellon
  54  * the rights to redistribute these changes.
  55  */
  56 /*
  57  * NOTICE: This file was modified by McAfee Research in 2004 to introduce
  58  * support for mandatory and extensible security protections.  This notice
  59  * is included in support of clause 2.2 (b) of the Apple Public License,
  60  * Version 2.0.
  61  * Copyright (c) 2005 SPARTA, Inc.
  62  */
  63 /*
  64  */
  65 /*
  66  *      File:   ipc/ipc_init.c
  67  *      Author: Rich Draves
  68  *      Date:   1989
  69  *
  70  *      Functions to initialize the IPC system.
  71  */
  72
  73 #include <mach_debug.h>
  74
  75 #include <mach/port.h>
  76 #include <mach/message.h>
  77 #include <mach/kern_return.h>
  78
  79 #include <kern/kern_types.h>
  80 #include <kern/arcade.h>
  81 #include <kern/kalloc.h>
  82 #include <kern/simple_lock.h>
  83 #include <kern/mach_param.h>
  84 #include <kern/ipc_host.h>
  85 #include <kern/ipc_kobject.h>
  86 #include <kern/ipc_mig.h>
  87 #include <kern/host_notify.h>
  88 #include <kern/mk_timer.h>
  89 #include <kern/misc_protos.h>
  90 #include <kern/suid_cred.h>
  91 #include <kern/sync_lock.h>
  92 #include <kern/sync_sema.h>
  93 #include <kern/ux_handler.h>
  94 #include <vm/vm_map.h>
  95 #include <vm/vm_kern.h>
  96
  97 #include <ipc/ipc_entry.h>
  98 #include <ipc/ipc_space.h>
  99 #include <ipc/ipc_object.h>
 100 #include <ipc/ipc_port.h>
 101 #include <ipc/ipc_pset.h>
 102 #include <ipc/ipc_notify.h>
 103 #include <ipc/ipc_kmsg.h>
 104 #include <ipc/ipc_hash.h>
 105 #include <ipc/ipc_init.h>
 106 #include <ipc/ipc_table.h>
 107 #include <ipc/ipc_voucher.h>
 108 #include <ipc/ipc_importance.h>
 109
 110 #include <mach/machine/ndr_def.h>   /* NDR_record */
 111
 112 vm_map_t ipc_kernel_map;
 113 vm_size_t ipc_kernel_map_size = 1024 * 1024;
 114
 115 /* values to limit physical copy out-of-line memory descriptors */
 116 vm_map_t ipc_kernel_copy_map;
 117 #define IPC_KERNEL_COPY_MAP_SIZE (8 * 1024 * 1024)
 118 vm_size_t ipc_kernel_copy_map_size = IPC_KERNEL_COPY_MAP_SIZE;
 119 vm_size_t ipc_kmsg_max_vm_space = ((IPC_KERNEL_COPY_MAP_SIZE * 7) / 8);
 120
 121 /*
 122  * values to limit inline message body handling
 123  * avoid copyin/out limits - even after accounting for maximum descriptor expansion.
 124  */
 125 #define IPC_KMSG_MAX_SPACE (64 * 1024 * 1024) /* keep in sync with COPYSIZELIMIT_PANIC */
 126 vm_size_t ipc_kmsg_max_body_space = ((IPC_KMSG_MAX_SPACE * 3) / 4 - MAX_TRAILER_SIZE);
 127
 128 int ipc_space_max;
 129 int ipc_port_max;
 130 int ipc_pset_max;
 131 int prioritize_launch = 1;
 132 int enforce_strict_reply = 0;
 133
 134
 135 lck_grp_t               ipc_lck_grp;
 136 lck_attr_t              ipc_lck_attr;
 137
 138 static lck_grp_attr_t   ipc_lck_grp_attr;
 139
 140 /*
 141  *      Routine:        ipc_bootstrap
 142  *      Purpose:
 143  *              Initialization needed before the kernel task
 144  *              can be created.
 145  */
 146
 147 void
 148 ipc_bootstrap(void)
 149 {
 150         kern_return_t kr;
 151         int prioritize_launch_bootarg;
 152         int strict_reply_bootarg;
 153
 154         lck_grp_attr_setdefault(&ipc_lck_grp_attr);
 155         lck_grp_init(&ipc_lck_grp, "ipc", &ipc_lck_grp_attr);
 156         lck_attr_setdefault(&ipc_lck_attr);
 157
 158         ipc_port_multiple_lock_init();
 159
 160         ipc_port_timestamp_data = 0;
 161
 162         /* all IPC zones should be exhaustible */
 163
 164         ipc_space_zone = zinit(sizeof(struct ipc_space),
 165             ipc_space_max * sizeof(struct ipc_space),
 166             sizeof(struct ipc_space),
 167             "ipc spaces");
 168         zone_change(ipc_space_zone, Z_NOENCRYPT, TRUE);
 169
 170         /*
 171          * populate all port(set) zones
 172          */
 173         ipc_object_zones[IOT_PORT] =
 174             zinit(sizeof(struct ipc_port),
 175             ipc_port_max * sizeof(struct ipc_port),
 176             sizeof(struct ipc_port),
 177             "ipc ports");
 178         /* cant charge callers for port allocations (references passed) */
 179         zone_change(ipc_object_zones[IOT_PORT], Z_CALLERACCT, FALSE);
 180         zone_change(ipc_object_zones[IOT_PORT], Z_NOENCRYPT, TRUE);
 181         zone_change(ipc_object_zones[IOT_PORT], Z_CLEARMEMORY, TRUE);
 182
 183         ipc_object_zones[IOT_PORT_SET] =
 184             zinit(sizeof(struct ipc_pset),
 185             ipc_pset_max * sizeof(struct ipc_pset),
 186             sizeof(struct ipc_pset),
 187             "ipc port sets");
 188         zone_change(ipc_object_zones[IOT_PORT_SET], Z_NOENCRYPT, TRUE);
 189         zone_change(ipc_object_zones[IOT_PORT_SET], Z_CLEARMEMORY, TRUE);
 190
 191         /*
 192          * Create the basic ipc_kmsg_t zone (the one we also cache)
 193          * elements at the processor-level to avoid the locking.
 194          */
 195         ipc_kmsg_zone = zinit(IKM_SAVED_KMSG_SIZE,
 196             ipc_port_max * MACH_PORT_QLIMIT_DEFAULT *
 197             IKM_SAVED_KMSG_SIZE,
 198             IKM_SAVED_KMSG_SIZE,
 199             "ipc kmsgs");
 200         zone_change(ipc_kmsg_zone, Z_CALLERACCT, FALSE);
 201         zone_change(ipc_kmsg_zone, Z_CACHING_ENABLED, TRUE);
 202
 203         /* create special spaces */
 204
 205         kr = ipc_space_create_special(&ipc_space_kernel);
 206         assert(kr == KERN_SUCCESS);
 207
 208
 209         kr = ipc_space_create_special(&ipc_space_reply);
 210         assert(kr == KERN_SUCCESS);
 211
 212         /* initialize modules with hidden data structures */
 213
 214 #if     MACH_ASSERT
 215         ipc_port_debug_init();
 216 #endif
 217         ipc_kobject_init();
 218         ipc_table_init();
 219         ipc_voucher_init();
 220
 221 #if IMPORTANCE_INHERITANCE
 222         ipc_importance_init();
 223 #endif
 224
 225         semaphore_init();
 226         mk_timer_init();
 227         host_notify_init();
 228
 229 #if CONFIG_ARCADE
 230         arcade_init();
 231 #endif
 232
 233         suid_cred_init();
 234
 235         if (PE_parse_boot_argn("prioritize_launch", &prioritize_launch_bootarg, sizeof(prioritize_launch_bootarg))) {
 236                 prioritize_launch = !!prioritize_launch_bootarg;
 237         }
 238         if (PE_parse_boot_argn("ipc_strict_reply", &strict_reply_bootarg, sizeof(strict_reply_bootarg))) {
 239                 enforce_strict_reply = !!strict_reply_bootarg;
 240         }
 241 }
 242
 243 /*
 244  * XXX tunable, belongs in mach.message.h
 245  */
 246 #define MSG_OOL_SIZE_SMALL_MAX (2*PAGE_SIZE)
 247 vm_size_t msg_ool_size_small;
 248
 249 /*
 250  *      Routine:        ipc_init
 251  *      Purpose:
 252  *              Final initialization of the IPC system.
 253  */
 254
 255 void
 256 ipc_init(void)
 257 {
 258         kern_return_t retval;
 259         vm_offset_t min;
 260
 261         retval = kmem_suballoc(kernel_map, &min, ipc_kernel_map_size,
 262             TRUE,
 263             (VM_FLAGS_ANYWHERE),
 264             VM_MAP_KERNEL_FLAGS_NONE,
 265             VM_KERN_MEMORY_IPC,
 266             &ipc_kernel_map);
 267
 268         if (retval != KERN_SUCCESS) {
 269                 panic("ipc_init: kmem_suballoc of ipc_kernel_map failed");
 270         }
 271
 272         retval = kmem_suballoc(kernel_map, &min, ipc_kernel_copy_map_size,
 273             TRUE,
 274             (VM_FLAGS_ANYWHERE),
 275             VM_MAP_KERNEL_FLAGS_NONE,
 276             VM_KERN_MEMORY_IPC,
 277             &ipc_kernel_copy_map);
 278
 279         if (retval != KERN_SUCCESS) {
 280                 panic("ipc_init: kmem_suballoc of ipc_kernel_copy_map failed");
 281         }
 282
 283         ipc_kernel_copy_map->no_zero_fill = TRUE;
 284         ipc_kernel_copy_map->wait_for_space = TRUE;
 285
 286         /*
 287          * As an optimization, 'small' out of line data regions using a
 288          * physical copy strategy are copied into kalloc'ed buffers.
 289          * The value of 'small' is determined here.  Requests kalloc()
 290          * with sizes greater or equal to kalloc_max_prerounded may fail.
 291          */
 292         if (kalloc_max_prerounded <= MSG_OOL_SIZE_SMALL_MAX) {
 293                 msg_ool_size_small = kalloc_max_prerounded;
 294         } else {
 295                 msg_ool_size_small = MSG_OOL_SIZE_SMALL_MAX;
 296         }
 297         /* account for overhead to avoid spilling over a page */
 298         msg_ool_size_small -= cpy_kdata_hdr_sz;
 299
 300         ipc_host_init();
 301         ux_handler_init();
 302 }
 303
 304
 305 /*
 306  *      Routine:        ipc_thread_call_init
 307  *      Purpose:
 308  *              Initialize IPC logic that needs thread call support
 309  */
 310
 311 void
 312 ipc_thread_call_init(void)
 313 {
 314 #if IMPORTANCE_INHERITANCE
 315         ipc_importance_thread_call_init();
 316 #endif
 317 }