osfmk/ipc/ipc_port.h

   1 /*
   2  * Copyright (c) 2000-2016 Apple Computer, 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  */
  62 /*
  63  */
  64 /*
  65  *      File:   ipc/ipc_port.h
  66  *      Author: Rich Draves
  67  *      Date:   1989
  68  *
  69  *      Definitions for ports.
  70  */
  71
  72 #ifndef _IPC_IPC_PORT_H_
  73 #define _IPC_IPC_PORT_H_
  74
  75 #ifdef MACH_KERNEL_PRIVATE
  76
  77 #include <mach_assert.h>
  78 #include <mach_debug.h>
  79
  80 #include <mach/mach_types.h>
  81 #include <mach/boolean.h>
  82 #include <mach/kern_return.h>
  83 #include <mach/port.h>
  84
  85 #include <kern/assert.h>
  86 #include <kern/kern_types.h>
  87 #include <kern/turnstile.h>
  88
  89 #include <ipc/ipc_types.h>
  90 #include <ipc/ipc_object.h>
  91 #include <ipc/ipc_mqueue.h>
  92 #include <ipc/ipc_space.h>
  93
  94 #include <security/_label.h>
  95
  96 /*
  97  *  A receive right (port) can be in four states:
  98  *      1) dead (not active, ip_timestamp has death time)
  99  *      2) in a space (ip_receiver_name != 0, ip_receiver points
 100  *      to the space but doesn't hold a ref for it)
 101  *      3) in transit (ip_receiver_name == 0, ip_destination points
 102  *      to the destination port and holds a ref for it)
 103  *      4) in limbo (ip_receiver_name == 0, ip_destination == IP_NULL)
 104  *
 105  *  If the port is active, and ip_receiver points to some space,
 106  *  then ip_receiver_name != 0, and that space holds receive rights.
 107  *  If the port is not active, then ip_timestamp contains a timestamp
 108  *  taken when the port was destroyed.
 109  */
 110
 111 struct task_watchport_elem;
 112
 113 typedef unsigned int ipc_port_timestamp_t;
 114
 115 struct ipc_port {
 116         /*
 117          * Initial sub-structure in common with ipc_pset
 118          * First element is an ipc_object second is a
 119          * message queue
 120          */
 121         struct ipc_object ip_object;
 122         struct ipc_mqueue ip_messages;
 123
 124         union {
 125                 struct ipc_space * receiver;
 126                 struct ipc_port * destination;
 127                 ipc_port_timestamp_t timestamp;
 128         } data;
 129
 130         /* update host_request_notification if this union is changed */
 131         union {
 132                 ipc_kobject_t XNU_PTRAUTH_SIGNED_PTR("ipc_port.kobject") kobject;
 133                 ipc_kobject_label_t XNU_PTRAUTH_SIGNED_PTR("ipc_port.kolabel") kolabel;
 134                 ipc_importance_task_t imp_task;
 135                 ipc_port_t sync_inheritor_port;
 136                 struct knote *sync_inheritor_knote;
 137                 struct turnstile *sync_inheritor_ts;
 138         } kdata;
 139
 140         struct ipc_port *ip_nsrequest;
 141         struct ipc_port *ip_pdrequest;
 142         struct ipc_port_request *ip_requests;
 143         union {
 144                 struct ipc_kmsg *premsg;
 145                 struct turnstile *send_turnstile;
 146         } kdata2;
 147
 148         mach_vm_address_t ip_context;
 149
 150         natural_t ip_sprequests:1,      /* send-possible requests outstanding */
 151             ip_spimportant:1,           /* ... at least one is importance donating */
 152             ip_impdonation:1,           /* port supports importance donation */
 153             ip_tempowner:1,             /* dont give donations to current receiver */
 154             ip_guarded:1,               /* port guarded (use context value as guard) */
 155             ip_strict_guard:1,          /* Strict guarding; Prevents user manipulation of context values directly */
 156             ip_specialreply:1,          /* port is a special reply port */
 157             ip_sync_link_state:3,       /* link the port to destination port/ Workloop */
 158             ip_sync_bootstrap_checkin:1,/* port part of sync bootstrap checkin, push on thread doing the checkin */
 159             ip_immovable_receive:1,     /* the receive right cannot be moved out of a space, until it is destroyed */
 160             ip_no_grant:1,              /* Port wont accept complex messages containing (ool) port descriptors */
 161             ip_immovable_send:1,        /* No send(once) rights to this port can be moved out of a space */
 162             ip_tg_block_tracking:1,     /* Track blocking relationship between thread groups during sync IPC */
 163             ip_impcount:17;             /* number of importance donations in nested queue */
 164
 165         mach_port_mscount_t ip_mscount;
 166         mach_port_rights_t ip_srights;
 167         mach_port_rights_t ip_sorights;
 168
 169 #if     MACH_ASSERT
 170 #define IP_NSPARES              4
 171 #define IP_CALLSTACK_MAX        16
 172 /*      queue_chain_t   ip_port_links;*//* all allocated ports */
 173         thread_t        ip_thread;      /* who made me?  thread context */
 174         unsigned long   ip_timetrack;   /* give an idea of "when" created */
 175         uintptr_t       ip_callstack[IP_CALLSTACK_MAX]; /* stack trace */
 176         unsigned long   ip_spares[IP_NSPARES]; /* for debugging */
 177 #endif  /* MACH_ASSERT */
 178 #if DEVELOPMENT || DEBUG
 179         uint8_t         ip_srp_lost_link:1,     /* special reply port turnstile link chain broken */
 180             ip_srp_msg_sent:1;                  /* special reply port msg sent */
 181 #endif
 182 };
 183
 184
 185 #define ip_references           ip_object.io_references
 186
 187 #define ip_receiver_name        ip_messages.imq_receiver_name
 188 #define ip_in_pset              ip_messages.imq_in_pset
 189 #define ip_reply_context        ip_messages.imq_context
 190
 191 #define ip_receiver             data.receiver
 192 #define ip_destination          data.destination
 193 #define ip_timestamp            data.timestamp
 194
 195 #define ip_kobject              kdata.kobject
 196 #define ip_kolabel              kdata.kolabel
 197 #define ip_imp_task             kdata.imp_task
 198 #define ip_sync_inheritor_port  kdata.sync_inheritor_port
 199 #define ip_sync_inheritor_knote kdata.sync_inheritor_knote
 200 #define ip_sync_inheritor_ts    kdata.sync_inheritor_ts
 201
 202 #define ip_premsg               kdata2.premsg
 203 #define ip_send_turnstile       kdata2.send_turnstile
 204
 205 #define port_send_turnstile(port)       (IP_PREALLOC(port) ? (port)->ip_premsg->ikm_turnstile : (port)->ip_send_turnstile)
 206
 207 #define set_port_send_turnstile(port, value)                 \
 208 MACRO_BEGIN                                                  \
 209 if (IP_PREALLOC(port)) {                                     \
 210         (port)->ip_premsg->ikm_turnstile = (value);          \
 211 } else {                                                     \
 212         (port)->ip_send_turnstile = (value);                 \
 213 }                                                            \
 214 MACRO_END
 215
 216 #define port_send_turnstile_address(port)                    \
 217 (IP_PREALLOC(port) ? &((port)->ip_premsg->ikm_turnstile) : &((port)->ip_send_turnstile))
 218
 219 #define port_rcv_turnstile_address(port) \
 220         &(port)->ip_messages.imq_wait_queue.waitq_ts
 221
 222
 223 /*
 224  * SYNC IPC state flags for special reply port/ rcv right.
 225  *
 226  * PORT_SYNC_LINK_ANY
 227  *    Special reply port is not linked to any other port
 228  *    or WL and linkage should be allowed.
 229  *
 230  * PORT_SYNC_LINK_PORT
 231  *    Special reply port is linked to the port and
 232  *    ip_sync_inheritor_port contains the inheritor
 233  *    port.
 234  *
 235  * PORT_SYNC_LINK_WORKLOOP_KNOTE
 236  *    Special reply port is linked to a WL (via a knote).
 237  *    ip_sync_inheritor_knote contains a pointer to the knote
 238  *    the port is stashed on.
 239  *
 240  * PORT_SYNC_LINK_WORKLOOP_STASH
 241  *    Special reply port is linked to a WL (via a knote stash).
 242  *    ip_sync_inheritor_ts contains a pointer to the turnstile with a +1
 243  *    the port is stashed on.
 244  *
 245  * PORT_SYNC_LINK_NO_LINKAGE
 246  *    Message sent to special reply port, do
 247  *    not allow any linkages till receive is
 248  *    complete.
 249  *
 250  * PORT_SYNC_LINK_RCV_THREAD
 251  *    Receive right copied out as a part of bootstrap check in,
 252  *    push on the thread which copied out the port.
 253  */
 254 #define PORT_SYNC_LINK_ANY              (0)
 255 #define PORT_SYNC_LINK_PORT             (0x1)
 256 #define PORT_SYNC_LINK_WORKLOOP_KNOTE   (0x2)
 257 #define PORT_SYNC_LINK_WORKLOOP_STASH   (0x3)
 258 #define PORT_SYNC_LINK_NO_LINKAGE       (0x4)
 259 #define PORT_SYNC_LINK_RCV_THREAD       (0x5)
 260
 261 #define IP_NULL                 IPC_PORT_NULL
 262 #define IP_DEAD                 IPC_PORT_DEAD
 263 #define IP_VALID(port)          IPC_PORT_VALID(port)
 264
 265 #define ip_object_to_port(io)   __container_of(io, struct ipc_port, ip_object)
 266 #define ip_to_object(port)      (&(port)->ip_object)
 267 #define ip_active(port)         io_active(ip_to_object(port))
 268 #define ip_lock_init(port)      io_lock_init(ip_to_object(port))
 269 #define ip_lock_held(port)      io_lock_held(ip_to_object(port))
 270 #define ip_lock(port)           io_lock(ip_to_object(port))
 271 #define ip_lock_try(port)       io_lock_try(ip_to_object(port))
 272 #define ip_lock_held_kdp(port)  io_lock_held_kdp(ip_to_object(port))
 273 #define ip_unlock(port)         io_unlock(ip_to_object(port))
 274
 275 #define ip_reference(port)      io_reference(ip_to_object(port))
 276 #define ip_release(port)        io_release(ip_to_object(port))
 277
 278 /* get an ipc_port pointer from an ipc_mqueue pointer */
 279 #define ip_from_mq(mq) \
 280                 __container_of(mq, struct ipc_port, ip_messages)
 281
 282 #define ip_reference_mq(mq)     ip_reference(ip_from_mq(mq))
 283 #define ip_release_mq(mq)       ip_release(ip_from_mq(mq))
 284
 285 #define ip_kotype(port)         io_kotype(ip_to_object(port))
 286 #define ip_is_kobject(port)     io_is_kobject(ip_to_object(port))
 287 #define ip_is_kolabeled(port)   io_is_kolabeled(ip_to_object(port))
 288 #define ip_get_kobject(port)    ipc_kobject_get(port)
 289 #define ip_label_check(space, port, msgt_name) \
 290         (!ip_is_kolabeled(port) || ipc_kobject_label_check((space), (port), (msgt_name)))
 291
 292 #define ip_full_kernel(port)    imq_full_kernel(&(port)->ip_messages)
 293 #define ip_full(port)           imq_full(&(port)->ip_messages)
 294
 295 /* Bits reserved in IO_BITS_PORT_INFO are defined here */
 296
 297 /*
 298  * JMM - Preallocation flag
 299  * This flag indicates that there is a message buffer preallocated for this
 300  * port and we should use that when sending (from the kernel) rather than
 301  * allocate a new one.  This avoids deadlocks during notification message
 302  * sends by critical system threads (which may be needed to free memory and
 303  * therefore cannot be blocked waiting for memory themselves).
 304  */
 305 #define IP_BIT_PREALLOC         0x00008000      /* preallocated mesg */
 306 #define IP_PREALLOC(port)       ((port)->ip_object.io_bits & IP_BIT_PREALLOC)
 307
 308 #define IP_SET_PREALLOC(port, kmsg)                                     \
 309 MACRO_BEGIN                                                             \
 310         (port)->ip_object.io_bits |= IP_BIT_PREALLOC;                   \
 311         (port)->ip_premsg = (kmsg);                                     \
 312 MACRO_END
 313
 314 #define IP_CLEAR_PREALLOC(port, kmsg)                                   \
 315 MACRO_BEGIN                                                             \
 316         assert((port)->ip_premsg == kmsg);                              \
 317         (port)->ip_object.io_bits &= ~IP_BIT_PREALLOC;                  \
 318         (port)->ip_premsg = IKM_NULL;                                   \
 319 MACRO_END
 320
 321 /*
 322  * This flag indicates that the port has opted into message filtering based
 323  * on a policy defined in the Sandbox.
 324  */
 325 #define IP_BIT_FILTER_MSG               0x00001000
 326 #define ip_enforce_msg_filtering(port)    (((port)->ip_object.io_bits & IP_BIT_FILTER_MSG) != 0)
 327
 328 /* JMM - address alignment/packing for LP64 */
 329 struct ipc_port_request {
 330         union {
 331                 struct ipc_port *port;
 332                 ipc_port_request_index_t index;
 333         } notify;
 334
 335         union {
 336                 mach_port_name_t name;
 337                 struct ipc_table_size *size;
 338         } name;
 339 };
 340
 341 #define ipr_next                notify.index
 342 #define ipr_size                name.size
 343
 344 #define ipr_soright             notify.port
 345 #define ipr_name                name.name
 346
 347 /*
 348  * Use the low bits in the ipr_soright to specify the request type
 349  */
 350 #define IPR_SOR_SPARM_MASK      1               /* send-possible armed */
 351 #define IPR_SOR_SPREQ_MASK      2               /* send-possible requested */
 352 #define IPR_SOR_SPBIT_MASK      3               /* combo */
 353 #define IPR_SOR_SPARMED(sor)    (((uintptr_t)(sor) & IPR_SOR_SPARM_MASK) != 0)
 354 #define IPR_SOR_SPREQ(sor)      (((uintptr_t)(sor) & IPR_SOR_SPREQ_MASK) != 0)
 355 #define IPR_SOR_PORT(sor)       ((ipc_port_t)((uintptr_t)(sor) & ~IPR_SOR_SPBIT_MASK))
 356 #define IPR_SOR_MAKE(p, m)       ((ipc_port_t)((uintptr_t)(p) | (m)))
 357
 358 extern lck_grp_t        ipc_lck_grp;
 359 extern lck_attr_t       ipc_lck_attr;
 360
 361 /*
 362  *      Taking the ipc_port_multiple lock grants the privilege
 363  *      to lock multiple ports at once.  No ports must locked
 364  *      when it is taken.
 365  */
 366
 367 extern lck_spin_t ipc_port_multiple_lock_data;
 368
 369 #define ipc_port_multiple_lock()                                        \
 370                 lck_spin_lock_grp(&ipc_port_multiple_lock_data, &ipc_lck_grp)
 371
 372 #define ipc_port_multiple_unlock()                                      \
 373                 lck_spin_unlock(&ipc_port_multiple_lock_data)
 374
 375 /*
 376  *      The port timestamp facility provides timestamps
 377  *      for port destruction.  It is used to serialize
 378  *      mach_port_names with port death.
 379  */
 380
 381 extern ipc_port_timestamp_t ipc_port_timestamp_data;
 382
 383 /* Retrieve a port timestamp value */
 384 extern ipc_port_timestamp_t ipc_port_timestamp(void);
 385
 386 /*
 387  *      Compares two timestamps, and returns TRUE if one
 388  *      happened before two.  Note that this formulation
 389  *      works when the timestamp wraps around at 2^32,
 390  *      as long as one and two aren't too far apart.
 391  */
 392
 393 #define IP_TIMESTAMP_ORDER(one, two)    ((int) ((one) - (two)) < 0)
 394
 395 static inline void
 396 require_ip_active(ipc_port_t port)
 397 {
 398         if (!ip_active(port)) {
 399                 panic("Using inactive port %p", port);
 400         }
 401 }
 402
 403 static inline kern_return_t
 404 ipc_port_translate(
 405         ipc_space_t                     space,
 406         mach_port_name_t                name,
 407         mach_port_right_t               right,
 408         ipc_port_t                     *portp)
 409 {
 410         ipc_object_t object;
 411         kern_return_t kr;
 412
 413         kr = ipc_object_translate(space, name, right, &object);
 414         *portp = (kr == KERN_SUCCESS) ? ip_object_to_port(object) : IP_NULL;
 415         return kr;
 416 }
 417
 418 #define ipc_port_translate_receive(space, name, portp)                  \
 419         ipc_port_translate((space), (name), MACH_PORT_RIGHT_RECEIVE, portp)
 420
 421 #define ipc_port_translate_send(space, name, portp)                     \
 422         ipc_port_translate((space), (name), MACH_PORT_RIGHT_SEND, portp)
 423
 424 /* Allocate a notification request slot */
 425 #if IMPORTANCE_INHERITANCE
 426 extern kern_return_t
 427 ipc_port_request_alloc(
 428         ipc_port_t                      port,
 429         mach_port_name_t                name,
 430         ipc_port_t                      soright,
 431         boolean_t                       send_possible,
 432         boolean_t                       immediate,
 433         ipc_port_request_index_t        *indexp,
 434         boolean_t                       *importantp);
 435 #else
 436 extern kern_return_t
 437 ipc_port_request_alloc(
 438         ipc_port_t                      port,
 439         mach_port_name_t                name,
 440         ipc_port_t                      soright,
 441         boolean_t                       send_possible,
 442         boolean_t                       immediate,
 443         ipc_port_request_index_t        *indexp);
 444 #endif /* IMPORTANCE_INHERITANCE */
 445
 446 /* Grow one of a port's tables of notifcation requests */
 447 extern kern_return_t ipc_port_request_grow(
 448         ipc_port_t                      port,
 449         ipc_table_elems_t               target_size);
 450
 451 /* Return the type(s) of notification requests outstanding */
 452 extern mach_port_type_t ipc_port_request_type(
 453         ipc_port_t                      port,
 454         mach_port_name_t                name,
 455         ipc_port_request_index_t        index);
 456
 457 /* Cancel a notification request and return the send-once right */
 458 extern ipc_port_t ipc_port_request_cancel(
 459         ipc_port_t                      port,
 460         mach_port_name_t                name,
 461         ipc_port_request_index_t        index);
 462
 463 /* Arm any delayed send-possible notification */
 464 extern boolean_t ipc_port_request_sparm(
 465         ipc_port_t                port,
 466         mach_port_name_t          name,
 467         ipc_port_request_index_t  index,
 468         mach_msg_option_t         option,
 469         mach_msg_priority_t       priority);
 470
 471 /* Make a port-deleted request */
 472 extern void ipc_port_pdrequest(
 473         ipc_port_t      port,
 474         ipc_port_t      notify,
 475         ipc_port_t      *previousp);
 476
 477 /* Make a no-senders request */
 478 extern void ipc_port_nsrequest(
 479         ipc_port_t              port,
 480         mach_port_mscount_t     sync,
 481         ipc_port_t              notify,
 482         ipc_port_t              *previousp);
 483
 484 /* Prepare a receive right for transmission/destruction */
 485 extern boolean_t ipc_port_clear_receiver(
 486         ipc_port_t              port,
 487         boolean_t               should_destroy);
 488
 489 __options_decl(ipc_port_init_flags_t, uint32_t, {
 490         IPC_PORT_INIT_NONE              = 0x00000000,
 491         IPC_PORT_INIT_MAKE_SEND_RIGHT   = 0x00000001,
 492         IPC_PORT_INIT_MESSAGE_QUEUE     = 0x00000002,
 493         IPC_PORT_INIT_SPECIAL_REPLY     = 0x00000004,
 494         IPC_PORT_INIT_FILTER_MESSAGE    = 0x00000008,
 495         IPC_PORT_INIT_TG_BLOCK_TRACKING = 0x00000010,
 496 });
 497
 498 /* Initialize a newly-allocated port */
 499 extern void ipc_port_init(
 500         ipc_port_t              port,
 501         ipc_space_t             space,
 502         ipc_port_init_flags_t   flags,
 503         mach_port_name_t        name);
 504
 505 /* Allocate a port */
 506 extern kern_return_t ipc_port_alloc(
 507         ipc_space_t             space,
 508         ipc_port_init_flags_t   flags,
 509         mach_port_name_t        *namep,
 510         ipc_port_t              *portp);
 511
 512 /* Allocate a port, with a specific name */
 513 extern kern_return_t ipc_port_alloc_name(
 514         ipc_space_t             space,
 515         ipc_port_init_flags_t   flags,
 516         mach_port_name_t        name,
 517         ipc_port_t              *portp);
 518
 519 /* Generate dead name notifications */
 520 extern void ipc_port_dnnotify(
 521         ipc_port_t              port);
 522
 523 /* Generate send-possible notifications */
 524 extern void ipc_port_spnotify(
 525         ipc_port_t              port);
 526
 527 /* Destroy a port */
 528 extern void ipc_port_destroy(
 529         ipc_port_t      port);
 530
 531 /* Check if queueing "port" in a message for "dest" would create a circular
 532  *  group of ports and messages */
 533 extern boolean_t
 534 ipc_port_check_circularity(
 535         ipc_port_t      port,
 536         ipc_port_t      dest);
 537
 538 #if IMPORTANCE_INHERITANCE
 539
 540 enum {
 541         IPID_OPTION_NORMAL       = 0, /* normal boost */
 542         IPID_OPTION_SENDPOSSIBLE = 1, /* send-possible induced boost */
 543 };
 544
 545 /* link the destination port with special reply port */
 546 void
 547 ipc_port_link_special_reply_port(
 548         ipc_port_t special_reply_port,
 549         ipc_port_t dest_port,
 550         boolean_t sync_bootstrap_checkin);
 551
 552 #define IPC_PORT_ADJUST_SR_NONE                      0
 553 #define IPC_PORT_ADJUST_SR_ALLOW_SYNC_LINKAGE        0x1
 554 #define IPC_PORT_ADJUST_SR_LINK_WORKLOOP             0x2
 555 #define IPC_PORT_ADJUST_UNLINK_THREAD                0x4
 556 #define IPC_PORT_ADJUST_SR_RECEIVED_MSG              0x8
 557 #define IPC_PORT_ADJUST_SR_ENABLE_EVENT              0x10
 558 #define IPC_PORT_ADJUST_RESET_BOOSTRAP_CHECKIN       0x20
 559
 560 void
 561 ipc_special_reply_port_bits_reset(ipc_port_t special_reply_port);
 562
 563 void
 564 ipc_special_reply_port_msg_sent(ipc_port_t special_reply_port);
 565
 566 void
 567 ipc_special_reply_port_msg_sent(ipc_port_t special_reply_port);
 568
 569 /* Adjust special reply port linkage */
 570 void
 571 ipc_port_adjust_special_reply_port_locked(
 572         ipc_port_t special_reply_port,
 573         struct knote *kn,
 574         uint8_t flags,
 575         boolean_t get_turnstile);
 576
 577 void
 578 ipc_port_adjust_sync_link_state_locked(
 579         ipc_port_t port,
 580         int sync_link_state,
 581         turnstile_inheritor_t inheritor);
 582
 583 /* Adjust special reply port linkage */
 584 void
 585 ipc_port_adjust_special_reply_port(
 586         ipc_port_t special_reply_port,
 587         uint8_t flags);
 588
 589 void
 590 ipc_port_adjust_port_locked(
 591         ipc_port_t port,
 592         struct knote *kn,
 593         boolean_t sync_bootstrap_checkin);
 594
 595 void
 596 ipc_port_clear_sync_rcv_thread_boost_locked(
 597         ipc_port_t port);
 598
 599 kern_return_t
 600 ipc_port_add_watchport_elem_locked(
 601         ipc_port_t                 port,
 602         struct task_watchport_elem *watchport_elem,
 603         struct task_watchport_elem **old_elem);
 604
 605 kern_return_t
 606 ipc_port_clear_watchport_elem_internal_conditional_locked(
 607         ipc_port_t                 port,
 608         struct task_watchport_elem *watchport_elem);
 609
 610 kern_return_t
 611 ipc_port_replace_watchport_elem_conditional_locked(
 612         ipc_port_t                 port,
 613         struct task_watchport_elem *old_watchport_elem,
 614         struct task_watchport_elem *new_watchport_elem);
 615
 616 struct task_watchport_elem *
 617 ipc_port_clear_watchport_elem_internal(
 618         ipc_port_t                 port);
 619
 620 void
 621 ipc_port_send_turnstile_prepare(ipc_port_t port);
 622
 623 void
 624 ipc_port_send_turnstile_complete(ipc_port_t port);
 625
 626 struct waitq *
 627 ipc_port_rcv_turnstile_waitq(struct waitq *waitq);
 628
 629 /* apply importance delta to port only */
 630 extern mach_port_delta_t
 631 ipc_port_impcount_delta(
 632         ipc_port_t              port,
 633         mach_port_delta_t       delta,
 634         ipc_port_t              base);
 635
 636 /* apply importance delta to port, and return task importance for update */
 637 extern boolean_t
 638 ipc_port_importance_delta_internal(
 639         ipc_port_t              port,
 640         natural_t               options,
 641         mach_port_delta_t       *deltap,
 642         ipc_importance_task_t   *imp_task);
 643
 644 /* Apply an importance delta to a port and reflect change in receiver task */
 645 extern boolean_t
 646 ipc_port_importance_delta(
 647         ipc_port_t              port,
 648         natural_t               options,
 649         mach_port_delta_t       delta);
 650 #endif /* IMPORTANCE_INHERITANCE */
 651
 652 /* Make a naked send right from a receive right - port locked and active */
 653 extern ipc_port_t ipc_port_make_send_locked(
 654         ipc_port_t      port);
 655
 656 /* Make a naked send right from a receive right */
 657 extern ipc_port_t ipc_port_make_send(
 658         ipc_port_t      port);
 659
 660 /* Make a naked send right from another naked send right - port locked and active */
 661 extern void ipc_port_copy_send_locked(
 662         ipc_port_t      port);
 663
 664 /* Make a naked send right from another naked send right */
 665 extern ipc_port_t ipc_port_copy_send(
 666         ipc_port_t      port);
 667
 668 /* Copyout a naked send right */
 669 extern mach_port_name_t ipc_port_copyout_send(
 670         ipc_port_t      sright,
 671         ipc_space_t     space);
 672
 673 extern void ipc_port_thread_group_blocked(
 674         ipc_port_t      port);
 675
 676 extern void ipc_port_thread_group_unblocked(void);
 677
 678 #endif /* MACH_KERNEL_PRIVATE */
 679
 680 #if KERNEL_PRIVATE
 681
 682 /* Release a (valid) naked send right */
 683 extern void ipc_port_release_send(
 684         ipc_port_t      port);
 685
 686 extern void ipc_port_reference(
 687         ipc_port_t port);
 688
 689 extern void ipc_port_release(
 690         ipc_port_t port);
 691
 692 #endif /* KERNEL_PRIVATE */
 693
 694 #ifdef MACH_KERNEL_PRIVATE
 695
 696 /* Make a naked send-once right from a locked and active receive right */
 697 extern ipc_port_t ipc_port_make_sonce_locked(
 698         ipc_port_t      port);
 699
 700 /* Make a naked send-once right from a receive right */
 701 extern ipc_port_t ipc_port_make_sonce(
 702         ipc_port_t      port);
 703
 704 /* Release a naked send-once right */
 705 extern void ipc_port_release_sonce(
 706         ipc_port_t      port);
 707
 708 /* Release a naked (in limbo or in transit) receive right */
 709 extern void ipc_port_release_receive(
 710         ipc_port_t      port);
 711
 712 /* finalize the destruction of a port before it gets freed */
 713 extern void ipc_port_finalize(
 714         ipc_port_t      port);
 715
 716 /* Allocate a port in a special space */
 717 extern ipc_port_t ipc_port_alloc_special(
 718         ipc_space_t             space,
 719         ipc_port_init_flags_t   flags);
 720
 721 /* Deallocate a port in a special space */
 722 extern void ipc_port_dealloc_special(
 723         ipc_port_t      port,
 724         ipc_space_t     space);
 725
 726 #if     MACH_ASSERT
 727 /* Track low-level port deallocation */
 728 extern void ipc_port_track_dealloc(
 729         ipc_port_t      port);
 730 #endif  /* MACH_ASSERT */
 731
 732 extern void ipc_port_recv_update_inheritor(ipc_port_t port,
 733     struct turnstile *turnstile,
 734     turnstile_update_flags_t flags);
 735
 736 extern void ipc_port_send_update_inheritor(ipc_port_t port,
 737     struct turnstile *turnstile,
 738     turnstile_update_flags_t flags);
 739
 740 extern int
 741 ipc_special_reply_get_pid_locked(ipc_port_t port);
 742
 743 #define ipc_port_alloc_kernel()         \
 744                 ipc_port_alloc_special(ipc_space_kernel, IPC_PORT_INIT_NONE)
 745 #define ipc_port_dealloc_kernel(port)   \
 746                 ipc_port_dealloc_special((port), ipc_space_kernel)
 747
 748 #define ipc_port_alloc_reply()          \
 749                 ipc_port_alloc_special(ipc_space_reply, IPC_PORT_INIT_MESSAGE_QUEUE)
 750 #define ipc_port_dealloc_reply(port)    \
 751                 ipc_port_dealloc_special((port), ipc_space_reply)
 752
 753 #endif /* MACH_KERNEL_PRIVATE */
 754
 755 #endif  /* _IPC_IPC_PORT_H_ */