osfmk/ipc/ipc_init.c

   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 /*
  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 #include <mach_rt.h>
  75
  76 #include <mach/port.h>
  77 #include <mach/kern_return.h>
  78
  79 #include <kern/kern_types.h>
  80 #include <kern/kalloc.h>
  81 #include <kern/mach_param.h>
  82 #include <kern/ipc_host.h>
  83 #include <kern/ipc_mig.h>
  84 #include <kern/host_notify.h>
  85 #include <kern/mk_timer.h>
  86 #include <kern/misc_protos.h>
  87 #include <kern/sync_lock.h>
  88 #include <kern/sync_sema.h>
  89 #include <vm/vm_map.h>
  90 #include <vm/vm_kern.h>
  91
  92 #include <ipc/ipc_entry.h>
  93 #include <ipc/ipc_space.h>
  94 #include <ipc/ipc_object.h>
  95 #include <ipc/ipc_port.h>
  96 #include <ipc/ipc_pset.h>
  97 #include <ipc/ipc_notify.h>
  98 #include <ipc/ipc_kmsg.h>
  99 #include <ipc/ipc_hash.h>
 100 #include <ipc/ipc_init.h>
 101 #include <ipc/ipc_table.h>
 102
 103 #include <mach/machine/ndr_def.h>   /* NDR_record */
 104 #include <ipc/ipc_labelh.h>
 105
 106 vm_map_t ipc_kernel_map;
 107 vm_size_t ipc_kernel_map_size = 1024 * 1024;
 108
 109 vm_map_t ipc_kernel_copy_map;
 110 #define IPC_KERNEL_COPY_MAP_SIZE (8 * 1024 * 1024)
 111 vm_size_t ipc_kernel_copy_map_size = IPC_KERNEL_COPY_MAP_SIZE;
 112 vm_size_t ipc_kmsg_max_vm_space = (IPC_KERNEL_COPY_MAP_SIZE * 7)/8;
 113
 114 int ipc_space_max;
 115 int ipc_tree_entry_max;
 116 int ipc_port_max;
 117 int ipc_pset_max;
 118
 119
 120 lck_grp_t               ipc_lck_grp;
 121 lck_attr_t              ipc_lck_attr;
 122
 123 static lck_grp_attr_t   ipc_lck_grp_attr;
 124
 125 extern void ikm_cache_init(void);
 126
 127 /*
 128  *      Routine:        ipc_bootstrap
 129  *      Purpose:
 130  *              Initialization needed before the kernel task
 131  *              can be created.
 132  */
 133
 134 void
 135 ipc_bootstrap(void)
 136 {
 137         kern_return_t kr;
 138
 139         lck_grp_attr_setdefault(&ipc_lck_grp_attr);
 140         lck_grp_init(&ipc_lck_grp, "ipc", &ipc_lck_grp_attr);
 141         lck_attr_setdefault(&ipc_lck_attr);
 142
 143         ipc_port_multiple_lock_init();
 144
 145         ipc_port_timestamp_lock_init();
 146         ipc_port_timestamp_data = 0;
 147
 148         /* all IPC zones should be exhaustible */
 149
 150         ipc_space_zone = zinit(sizeof(struct ipc_space),
 151                                ipc_space_max * sizeof(struct ipc_space),
 152                                sizeof(struct ipc_space),
 153                                "ipc spaces");
 154         zone_change(ipc_space_zone, Z_NOENCRYPT, TRUE);
 155
 156         ipc_tree_entry_zone =
 157                 zinit(sizeof(struct ipc_tree_entry),
 158                         ipc_tree_entry_max * sizeof(struct ipc_tree_entry),
 159                         sizeof(struct ipc_tree_entry),
 160                         "ipc tree entries");
 161         zone_change(ipc_tree_entry_zone, Z_NOENCRYPT, TRUE);
 162
 163         /*
 164          * populate all port(set) zones
 165          */
 166         ipc_object_zones[IOT_PORT] =
 167                 zinit(sizeof(struct ipc_port),
 168                       ipc_port_max * sizeof(struct ipc_port),
 169                       sizeof(struct ipc_port),
 170                       "ipc ports");
 171         /* cant charge callers for port allocations (references passed) */
 172         zone_change(ipc_object_zones[IOT_PORT], Z_CALLERACCT, FALSE);
 173         zone_change(ipc_object_zones[IOT_PORT], Z_NOENCRYPT, TRUE);
 174
 175         ipc_object_zones[IOT_PORT_SET] =
 176                 zinit(sizeof(struct ipc_pset),
 177                       ipc_pset_max * sizeof(struct ipc_pset),
 178                       sizeof(struct ipc_pset),
 179                       "ipc port sets");
 180         zone_change(ipc_object_zones[IOT_PORT_SET], Z_NOENCRYPT, TRUE);
 181
 182         /*
 183          * Create the basic ipc_kmsg_t zone (the one we also cache)
 184          * elements at the processor-level to avoid the locking.
 185          */
 186         ipc_kmsg_zone = zinit(IKM_SAVED_KMSG_SIZE,
 187                               ipc_port_max * MACH_PORT_QLIMIT_DEFAULT *
 188                               IKM_SAVED_KMSG_SIZE,
 189                               IKM_SAVED_KMSG_SIZE,
 190                               "ipc kmsgs");
 191         zone_change(ipc_kmsg_zone, Z_CALLERACCT, FALSE);
 192         zone_change(ipc_kmsg_zone, Z_NOENCRYPT, TRUE);
 193
 194 #if CONFIG_MACF_MACH
 195         ipc_labelh_zone =
 196                 zinit(sizeof(struct ipc_labelh),
 197                       ipc_port_max * sizeof(struct ipc_labelh),
 198                       sizeof(struct ipc_labelh),
 199                       "label handles");
 200         /* cant charge callers for label allocations (port refs passed) */
 201         zone_change(ipc_labelh_zone, Z_CALLERACCT, FALSE);
 202
 203 #endif
 204
 205         /* create special spaces */
 206
 207         kr = ipc_space_create_special(&ipc_space_kernel);
 208         assert(kr == KERN_SUCCESS);
 209
 210
 211         kr = ipc_space_create_special(&ipc_space_reply);
 212         assert(kr == KERN_SUCCESS);
 213
 214         /* initialize modules with hidden data structures */
 215
 216 #if     MACH_ASSERT
 217         ipc_port_debug_init();
 218 #endif
 219         mig_init();
 220         ipc_table_init();
 221         ipc_hash_init();
 222         semaphore_init();
 223         lock_set_init();
 224         mk_timer_init();
 225         host_notify_init();
 226 }
 227
 228 /*
 229  * XXX tunable, belongs in mach.message.h
 230  */
 231 #define MSG_OOL_SIZE_SMALL_MAX 4096
 232 vm_size_t msg_ool_size_small;
 233
 234 /*
 235  *      Routine:        ipc_init
 236  *      Purpose:
 237  *              Final initialization of the IPC system.
 238  */
 239
 240 void
 241 ipc_init(void)
 242 {
 243         kern_return_t retval;
 244         vm_offset_t min;
 245
 246         retval = kmem_suballoc(kernel_map, &min, ipc_kernel_map_size,
 247                                TRUE, VM_FLAGS_ANYWHERE, &ipc_kernel_map);
 248
 249         if (retval != KERN_SUCCESS)
 250                 panic("ipc_init: kmem_suballoc of ipc_kernel_map failed");
 251
 252         retval = kmem_suballoc(kernel_map, &min, ipc_kernel_copy_map_size,
 253                                TRUE, VM_FLAGS_ANYWHERE, &ipc_kernel_copy_map);
 254
 255         if (retval != KERN_SUCCESS)
 256                 panic("ipc_init: kmem_suballoc of ipc_kernel_copy_map failed");
 257
 258         ipc_kernel_copy_map->no_zero_fill = TRUE;
 259         ipc_kernel_copy_map->wait_for_space = TRUE;
 260
 261         /*
 262          * As an optimization, 'small' out of line data regions using a
 263          * physical copy strategy are copied into kalloc'ed buffers.
 264          * The value of 'small' is determined here.  Requests kalloc()
 265          * with sizes greater or equal to kalloc_max_prerounded may fail.
 266          */
 267         if (kalloc_max_prerounded <=  MSG_OOL_SIZE_SMALL_MAX) {
 268                 msg_ool_size_small = kalloc_max_prerounded;
 269         }
 270         else {
 271                 msg_ool_size_small = MSG_OOL_SIZE_SMALL_MAX;
 272         }
 273
 274         ipc_host_init();
 275 }