* Copyright (c) 2000-2007 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
+ *
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
- *
+ *
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
- *
+ *
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
- *
+ *
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* @OSF_COPYRIGHT@
*/
-/*
+/*
* Mach Operating System
* Copyright (c) 1991,1990,1989 Carnegie Mellon University
* All Rights Reserved.
- *
+ *
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
- *
+ *
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
- *
+ *
* Carnegie Mellon requests users of this software to return to
- *
+ *
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
- *
+ *
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* File: ipc/mach_port.c
* Author: Rich Draves
- * Date: 1989
+ * Date: 1989
*
* Exported kernel calls. See mach/mach_port.defs.
*/
#include <mach_debug.h>
-#include <mach_rt.h>
#include <mach/port.h>
#include <mach/kern_return.h>
#include <kern/counters.h>
#include <kern/thread.h>
#include <kern/kalloc.h>
+#include <kern/exc_guard.h>
#include <mach/mach_port_server.h>
#include <vm/vm_map.h>
#include <vm/vm_kern.h>
+#include <ipc/port.h>
#include <ipc/ipc_entry.h>
#include <ipc/ipc_space.h>
#include <ipc/ipc_object.h>
#include <ipc/ipc_pset.h>
#include <ipc/ipc_right.h>
#include <ipc/ipc_kmsg.h>
-#include <ipc/ipc_labelh.h>
#include <kern/misc_protos.h>
#include <security/mac_mach_internal.h>
-#include <mach/security_server.h>
-
-/*
- * Forward declarations
- */
-void mach_port_names_helper(
- ipc_port_timestamp_t timestamp,
- ipc_entry_t entry,
- mach_port_name_t name,
- mach_port_name_t *names,
- mach_port_type_t *types,
- ipc_entry_num_t *actualp);
-
-void mach_port_gst_helper(
- ipc_pset_t pset,
- ipc_port_t port,
- ipc_entry_num_t maxnames,
- mach_port_name_t *names,
- ipc_entry_num_t *actualp);
+#if IMPORTANCE_INHERITANCE
+#include <ipc/ipc_importance.h>
+#endif
/* Zeroed template of qos flags */
-static mach_port_qos_t qos_template;
+static mach_port_qos_t qos_template;
/*
* Routine: mach_port_names_helper
* Conditions:
* Space containing entry is [at least] read-locked.
*/
-
-void
+static void
mach_port_names_helper(
- ipc_port_timestamp_t timestamp,
- ipc_entry_t entry,
- mach_port_name_t name,
- mach_port_name_t *names,
- mach_port_type_t *types,
- ipc_entry_num_t *actualp)
+ ipc_port_timestamp_t timestamp,
+ ipc_entry_t entry,
+ mach_port_name_t name,
+ mach_port_name_t *names,
+ mach_port_type_t *types,
+ ipc_entry_num_t *actualp)
{
ipc_entry_bits_t bits;
ipc_port_request_index_t request;
bits = entry->ie_bits;
request = entry->ie_request;
- port = (ipc_port_t) entry->ie_object;
+ port = ip_object_to_port(entry->ie_object);
if (bits & MACH_PORT_TYPE_RECEIVE) {
assert(IP_VALID(port));
if (request != IE_REQ_NONE) {
ip_lock(port);
- assert(ip_active(port));
+ require_ip_active(port);
type |= ipc_port_request_type(port, name, request);
ip_unlock(port);
}
-
} else if (bits & MACH_PORT_TYPE_SEND_RIGHTS) {
mach_port_type_t reqtype;
ip_lock(port);
reqtype = (request != IE_REQ_NONE) ?
- ipc_port_request_type(port, name, request) : 0;
-
+ ipc_port_request_type(port, name, request) : 0;
+
/*
* If the port is alive, or was alive when the mach_port_names
* started, then return that fact. Otherwise, pretend we found
bits &= ~(IE_BITS_TYPE_MASK);
bits |= MACH_PORT_TYPE_DEAD_NAME;
/* account for additional reference for dead-name notification */
- if (reqtype != 0)
+ if (reqtype != 0) {
bits++;
+ }
}
ip_unlock(port);
}
actual = *actualp;
names[actual] = name;
types[actual] = type;
- *actualp = actual+1;
+ *actualp = actual + 1;
}
/*
kern_return_t
mach_port_names(
- ipc_space_t space,
- mach_port_name_t **namesp,
- mach_msg_type_number_t *namesCnt,
- mach_port_type_t **typesp,
- mach_msg_type_number_t *typesCnt)
+ ipc_space_t space,
+ mach_port_name_t **namesp,
+ mach_msg_type_number_t *namesCnt,
+ mach_port_type_t **typesp,
+ mach_msg_type_number_t *typesCnt)
{
ipc_entry_t table;
ipc_entry_num_t tsize;
mach_port_index_t index;
- ipc_entry_num_t actual; /* this many names */
- ipc_port_timestamp_t timestamp; /* logical time of this operation */
+ ipc_entry_num_t actual; /* this many names */
+ ipc_port_timestamp_t timestamp; /* logical time of this operation */
mach_port_name_t *names;
mach_port_type_t *types;
kern_return_t kr;
- vm_size_t size; /* size of allocated memory */
- vm_offset_t addr1; /* allocated memory, for names */
- vm_offset_t addr2; /* allocated memory, for types */
- vm_map_copy_t memory1; /* copied-in memory, for names */
- vm_map_copy_t memory2; /* copied-in memory, for types */
+ vm_size_t size; /* size of allocated memory */
+ vm_offset_t addr1; /* allocated memory, for names */
+ vm_offset_t addr2; /* allocated memory, for types */
+ vm_map_copy_t memory1; /* copied-in memory, for names */
+ vm_map_copy_t memory2; /* copied-in memory, for types */
/* safe simplifying assumption */
- assert_static(sizeof(mach_port_name_t) == sizeof(mach_port_type_t));
+ static_assert(sizeof(mach_port_name_t) == sizeof(mach_port_type_t));
- if (space == IS_NULL)
+ if (space == IS_NULL) {
return KERN_INVALID_TASK;
+ }
size = 0;
/* upper bound on number of names in the space */
bound = space->is_table_size;
- size_needed = round_page(bound * sizeof(mach_port_name_t));
+ size_needed = vm_map_round_page(
+ (bound * sizeof(mach_port_name_t)),
+ VM_MAP_PAGE_MASK(ipc_kernel_map));
- if (size_needed <= size)
+ if (size_needed <= size) {
break;
+ }
is_read_unlock(space);
}
size = size_needed;
- kr = vm_allocate(ipc_kernel_map, &addr1, size, VM_FLAGS_ANYWHERE);
- if (kr != KERN_SUCCESS)
+ kr = vm_allocate_kernel(ipc_kernel_map, &addr1, size, VM_FLAGS_ANYWHERE, VM_KERN_MEMORY_IPC);
+ if (kr != KERN_SUCCESS) {
return KERN_RESOURCE_SHORTAGE;
+ }
- kr = vm_allocate(ipc_kernel_map, &addr2, size, VM_FLAGS_ANYWHERE);
+ kr = vm_allocate_kernel(ipc_kernel_map, &addr2, size, VM_FLAGS_ANYWHERE, VM_KERN_MEMORY_IPC);
if (kr != KERN_SUCCESS) {
kmem_free(ipc_kernel_map, addr1, size);
return KERN_RESOURCE_SHORTAGE;
/* can't fault while we hold locks */
- kr = vm_map_wire(ipc_kernel_map, vm_map_trunc_page(addr1),
- vm_map_round_page(addr1 + size),
- VM_PROT_READ|VM_PROT_WRITE, FALSE);
+ kr = vm_map_wire_kernel(
+ ipc_kernel_map,
+ vm_map_trunc_page(addr1,
+ VM_MAP_PAGE_MASK(ipc_kernel_map)),
+ vm_map_round_page(addr1 + size,
+ VM_MAP_PAGE_MASK(ipc_kernel_map)),
+ VM_PROT_READ | VM_PROT_WRITE, VM_KERN_MEMORY_IPC,
+ FALSE);
if (kr != KERN_SUCCESS) {
kmem_free(ipc_kernel_map, addr1, size);
kmem_free(ipc_kernel_map, addr2, size);
return KERN_RESOURCE_SHORTAGE;
}
- kr = vm_map_wire(ipc_kernel_map, vm_map_trunc_page(addr2),
- vm_map_round_page(addr2 + size),
- VM_PROT_READ|VM_PROT_WRITE, FALSE);
+ kr = vm_map_wire_kernel(
+ ipc_kernel_map,
+ vm_map_trunc_page(addr2,
+ VM_MAP_PAGE_MASK(ipc_kernel_map)),
+ vm_map_round_page(addr2 + size,
+ VM_MAP_PAGE_MASK(ipc_kernel_map)),
+ VM_PROT_READ | VM_PROT_WRITE,
+ VM_KERN_MEMORY_IPC,
+ FALSE);
if (kr != KERN_SUCCESS) {
kmem_free(ipc_kernel_map, addr1, size);
kmem_free(ipc_kernel_map, addr2, size);
return KERN_RESOURCE_SHORTAGE;
}
-
}
/* space is read-locked and active */
name = MACH_PORT_MAKE(index, IE_BITS_GEN(bits));
mach_port_names_helper(timestamp, entry, name, names,
- types, &actual);
+ types, &actual);
}
}
vm_size_t vm_size_used;
size_used = actual * sizeof(mach_port_name_t);
- vm_size_used = round_page(size_used);
+ vm_size_used =
+ vm_map_round_page(size_used,
+ VM_MAP_PAGE_MASK(ipc_kernel_map));
/*
* Make used memory pageable and get it into
* copied-in form. Free any unused memory.
*/
- kr = vm_map_unwire(ipc_kernel_map, vm_map_trunc_page(addr1),
- vm_map_round_page(addr1 + vm_size_used), FALSE);
+ kr = vm_map_unwire(
+ ipc_kernel_map,
+ vm_map_trunc_page(addr1,
+ VM_MAP_PAGE_MASK(ipc_kernel_map)),
+ vm_map_round_page(addr1 + vm_size_used,
+ VM_MAP_PAGE_MASK(ipc_kernel_map)),
+ FALSE);
assert(kr == KERN_SUCCESS);
- kr = vm_map_unwire(ipc_kernel_map, vm_map_trunc_page(addr2),
- vm_map_round_page(addr2 + vm_size_used), FALSE);
+ kr = vm_map_unwire(
+ ipc_kernel_map,
+ vm_map_trunc_page(addr2,
+ VM_MAP_PAGE_MASK(ipc_kernel_map)),
+ vm_map_round_page(addr2 + vm_size_used,
+ VM_MAP_PAGE_MASK(ipc_kernel_map)),
+ FALSE);
assert(kr == KERN_SUCCESS);
kr = vm_map_copyin(ipc_kernel_map, (vm_map_address_t)addr1,
- (vm_map_size_t)size_used, TRUE, &memory1);
+ (vm_map_size_t)size_used, TRUE, &memory1);
assert(kr == KERN_SUCCESS);
kr = vm_map_copyin(ipc_kernel_map, (vm_map_address_t)addr2,
- (vm_map_size_t)size_used, TRUE, &memory2);
+ (vm_map_size_t)size_used, TRUE, &memory2);
assert(kr == KERN_SUCCESS);
if (vm_size_used != size) {
kmem_free(ipc_kernel_map,
- addr1 + vm_size_used, size - vm_size_used);
+ addr1 + vm_size_used, size - vm_size_used);
kmem_free(ipc_kernel_map,
- addr2 + vm_size_used, size - vm_size_used);
+ addr2 + vm_size_used, size - vm_size_used);
}
}
kern_return_t
mach_port_type(
- ipc_space_t space,
- mach_port_name_t name,
- mach_port_type_t *typep)
+ ipc_space_t space,
+ mach_port_name_t name,
+ mach_port_type_t *typep)
{
mach_port_urefs_t urefs;
ipc_entry_t entry;
kern_return_t kr;
- if (space == IS_NULL)
+ if (space == IS_NULL) {
return KERN_INVALID_TASK;
+ }
- if (name == MACH_PORT_NULL)
+ if (name == MACH_PORT_NULL) {
return KERN_INVALID_NAME;
+ }
if (name == MACH_PORT_DEAD) {
*typep = MACH_PORT_TYPE_DEAD_NAME;
}
kr = ipc_right_lookup_write(space, name, &entry);
- if (kr != KERN_SUCCESS)
+ if (kr != KERN_SUCCESS) {
return kr;
+ }
/* space is write-locked and active */
kr = ipc_right_info(space, name, entry, typep, &urefs);
/* space is unlocked */
#if 1
- /* JMM - workaround rdar://problem/9121297 (CF being too picky on these bits). */
- *typep &= ~(MACH_PORT_TYPE_SPREQUEST | MACH_PORT_TYPE_SPREQUEST_DELAYED);
+ /* JMM - workaround rdar://problem/9121297 (CF being too picky on these bits). */
+ *typep &= ~(MACH_PORT_TYPE_SPREQUEST | MACH_PORT_TYPE_SPREQUEST_DELAYED);
#endif
return kr;
kern_return_t
mach_port_rename(
- __unused ipc_space_t space,
- __unused mach_port_name_t oname,
- __unused mach_port_name_t nname)
+ __unused ipc_space_t space,
+ __unused mach_port_name_t oname,
+ __unused mach_port_name_t nname)
{
return KERN_NOT_SUPPORTED;
}
kern_return_t
mach_port_allocate_name(
- ipc_space_t space,
- mach_port_right_t right,
- mach_port_name_t name)
+ ipc_space_t space,
+ mach_port_right_t right,
+ mach_port_name_t name)
{
- kern_return_t kr;
- mach_port_qos_t qos = qos_template;
+ kern_return_t kr;
+ mach_port_qos_t qos = qos_template;
qos.name = TRUE;
- if (!MACH_PORT_VALID(name))
+ if (!MACH_PORT_VALID(name)) {
return KERN_INVALID_VALUE;
+ }
- kr = mach_port_allocate_full (space, right, MACH_PORT_NULL,
- &qos, &name);
- return (kr);
+ kr = mach_port_allocate_full(space, right, MACH_PORT_NULL,
+ &qos, &name);
+ return kr;
}
/*
kern_return_t
mach_port_allocate(
- ipc_space_t space,
- mach_port_right_t right,
- mach_port_name_t *namep)
+ ipc_space_t space,
+ mach_port_right_t right,
+ mach_port_name_t *namep)
{
- kern_return_t kr;
- mach_port_qos_t qos = qos_template;
+ kern_return_t kr;
+ mach_port_qos_t qos = qos_template;
- kr = mach_port_allocate_full (space, right, MACH_PORT_NULL,
- &qos, namep);
- return (kr);
+ kr = mach_port_allocate_full(space, right, MACH_PORT_NULL,
+ &qos, namep);
+ return kr;
}
/*
* Routine: mach_port_allocate_qos [kernel call]
* Purpose:
- * Allocates a right, with qos options, in a space. Like
- * mach_port_allocate_name, except that the implementation
- * picks a name for the right. The name may be any legal name
+ * Allocates a right, with qos options, in a space. Like
+ * mach_port_allocate_name, except that the implementation
+ * picks a name for the right. The name may be any legal name
* in the space that doesn't currently denote a right.
* Conditions:
* Nothing locked.
kern_return_t
mach_port_allocate_qos(
- ipc_space_t space,
- mach_port_right_t right,
- mach_port_qos_t *qosp,
- mach_port_name_t *namep)
+ ipc_space_t space,
+ mach_port_right_t right,
+ mach_port_qos_t *qosp,
+ mach_port_name_t *namep)
{
- kern_return_t kr;
+ kern_return_t kr;
- if (qosp->name)
+ if (qosp->name) {
return KERN_INVALID_ARGUMENT;
- kr = mach_port_allocate_full (space, right, MACH_PORT_NULL,
- qosp, namep);
- return (kr);
+ }
+ kr = mach_port_allocate_full(space, right, MACH_PORT_NULL,
+ qosp, namep);
+ return kr;
}
/*
* Routine: mach_port_allocate_full [kernel call]
* Purpose:
- * Allocates a right in a space. Supports all of the
- * special cases, such as specifying a subsystem,
- * a specific name, a real-time port, etc.
- * The name may be any legal name in the space that doesn't
+ * Allocates a right in a space. Supports the
+ * special case of specifying a name. The name may
+ * be any legal name in the space that doesn't
* currently denote a right.
+ *
+ * While we no longer support users requesting
+ * preallocated message for the port, we still
+ * check for errors in such requests and then
+ * just clear the request.
* Conditions:
* Nothing locked.
* Returns:
kern_return_t
mach_port_allocate_full(
- ipc_space_t space,
- mach_port_right_t right,
- mach_port_t proto,
- mach_port_qos_t *qosp,
- mach_port_name_t *namep)
+ ipc_space_t space,
+ mach_port_right_t right,
+ mach_port_t proto,
+ mach_port_qos_t *qosp,
+ mach_port_name_t *namep)
{
- ipc_kmsg_t kmsg = IKM_NULL;
- kern_return_t kr;
+ kern_return_t kr;
- if (space == IS_NULL)
- return (KERN_INVALID_TASK);
+ if (space == IS_NULL) {
+ return KERN_INVALID_TASK;
+ }
- if (proto != MACH_PORT_NULL)
- return (KERN_INVALID_VALUE);
+ if (proto != MACH_PORT_NULL) {
+ return KERN_INVALID_VALUE;
+ }
if (qosp->name) {
- if (!MACH_PORT_VALID (*namep))
- return (KERN_INVALID_VALUE);
+ if (!MACH_PORT_VALID(*namep)) {
+ return KERN_INVALID_VALUE;
+ }
}
+ /*
+ * Don't actually honor prealloc requests from user-space
+ * (for security reasons, and because it isn't guaranteed anyway).
+ * Keep old errors for legacy reasons.
+ */
if (qosp->prealloc) {
if (qosp->len > MACH_MSG_SIZE_MAX - MAX_TRAILER_SIZE) {
return KERN_RESOURCE_SHORTAGE;
- } else {
- mach_msg_size_t size = qosp->len + MAX_TRAILER_SIZE;
-
- if (right != MACH_PORT_RIGHT_RECEIVE)
- return (KERN_INVALID_VALUE);
-
- kmsg = (ipc_kmsg_t)ipc_kmsg_prealloc(size);
- if (kmsg == IKM_NULL)
- return (KERN_RESOURCE_SHORTAGE);
}
+ if (right != MACH_PORT_RIGHT_RECEIVE) {
+ return KERN_INVALID_VALUE;
+ }
+ qosp->prealloc = 0;
}
+ kr = mach_port_allocate_internal(space, right, qosp, namep);
+ return kr;
+}
+
+
+/*
+ * Routine: mach_port_allocate_internal [kernel private]
+ * Purpose:
+ * Allocates a right in a space. Supports all of the
+ * special cases, a specific name, a real-time port, etc.
+ * The name may be any legal name in the space that doesn't
+ * currently denote a right.
+ * Conditions:
+ * Nothing locked.
+ * Returns:
+ * KERN_SUCCESS The right is allocated.
+ * KERN_INVALID_TASK The space is null.
+ * KERN_INVALID_TASK The space is dead.
+ * KERN_INVALID_VALUE "right" isn't a legal kind of right.
+ * KERN_RESOURCE_SHORTAGE Couldn't allocate memory.
+ * KERN_NO_SPACE No room in space for another right.
+ */
+kern_return_t
+mach_port_allocate_internal(
+ ipc_space_t space,
+ mach_port_right_t right,
+ mach_port_qos_t *qosp,
+ mach_port_name_t *namep)
+{
+ kern_return_t kr;
+
+ assert(space != IS_NULL);
+
switch (right) {
- case MACH_PORT_RIGHT_RECEIVE:
- {
- ipc_port_t port;
+ case MACH_PORT_RIGHT_RECEIVE:
+ {
+ ipc_kmsg_t kmsg = IKM_NULL;
+ ipc_port_t port;
+
+ /*
+ * For in-kernel uses, only allow small (from the kmsg zone)
+ * preallocated messages for the port.
+ */
+ if (qosp->prealloc) {
+ mach_msg_size_t size = qosp->len;
+
+ if (size > IKM_SAVED_MSG_SIZE - MAX_TRAILER_SIZE) {
+ panic("mach_port_allocate_internal: too large a prealloc kmsg");
+ }
+ kmsg = (ipc_kmsg_t)ipc_kmsg_prealloc(size + MAX_TRAILER_SIZE);
+ if (kmsg == IKM_NULL) {
+ return KERN_RESOURCE_SHORTAGE;
+ }
+ }
- if (qosp->name)
+ if (qosp->name) {
kr = ipc_port_alloc_name(space, *namep, &port);
- else
- kr = ipc_port_alloc(space, namep, &port);
+ } else {
+ kr = ipc_port_alloc(space, FALSE, namep, &port);
+ }
if (kr == KERN_SUCCESS) {
- if (kmsg != IKM_NULL)
+ if (kmsg != IKM_NULL) {
ipc_kmsg_set_prealloc(kmsg, port);
-
+ }
ip_unlock(port);
-
- } else if (kmsg != IKM_NULL)
+ } else if (kmsg != IKM_NULL) {
ipc_kmsg_free(kmsg);
+ }
break;
- }
+ }
- case MACH_PORT_RIGHT_PORT_SET:
- {
- ipc_pset_t pset;
+ case MACH_PORT_RIGHT_PORT_SET:
+ {
+ ipc_pset_t pset;
- if (qosp->name)
+ if (qosp->name) {
kr = ipc_pset_alloc_name(space, *namep, &pset);
- else
+ } else {
kr = ipc_pset_alloc(space, namep, &pset);
- if (kr == KERN_SUCCESS)
+ }
+ if (kr == KERN_SUCCESS) {
ips_unlock(pset);
+ }
break;
- }
+ }
- case MACH_PORT_RIGHT_DEAD_NAME:
+ case MACH_PORT_RIGHT_DEAD_NAME:
kr = ipc_object_alloc_dead(space, namep);
break;
- default:
+ default:
kr = KERN_INVALID_VALUE;
break;
}
- return (kr);
+ return kr;
}
/*
kern_return_t
mach_port_destroy(
- ipc_space_t space,
- mach_port_name_t name)
+ ipc_space_t space,
+ mach_port_name_t name)
{
ipc_entry_t entry;
kern_return_t kr;
- if (space == IS_NULL)
+ if (space == IS_NULL) {
return KERN_INVALID_TASK;
+ }
- if (!MACH_PORT_VALID(name))
+ if (!MACH_PORT_VALID(name)) {
return KERN_SUCCESS;
+ }
kr = ipc_right_lookup_write(space, name, &entry);
- if (kr != KERN_SUCCESS)
+ if (kr != KERN_SUCCESS) {
+ mach_port_guard_exception(name, 0, 0, kGUARD_EXC_INVALID_NAME);
return kr;
+ }
/* space is write-locked and active */
- kr = ipc_right_destroy(space, name, entry); /* unlocks space */
+ kr = ipc_right_destroy(space, name, entry, TRUE, 0); /* unlocks space */
return kr;
}
* Routine: mach_port_deallocate [kernel call]
* Purpose:
* Deallocates a user reference from a send right,
- * send-once right, or a dead-name right. May
- * deallocate the right, if this is the last uref,
+ * send-once right, dead-name right or a port_set right.
+ * May deallocate the right, if this is the last uref,
* and destroy the name, if it doesn't denote
* other rights.
* Conditions:
kern_return_t
mach_port_deallocate(
- ipc_space_t space,
- mach_port_name_t name)
+ ipc_space_t space,
+ mach_port_name_t name)
{
ipc_entry_t entry;
kern_return_t kr;
- if (space == IS_NULL)
+ if (space == IS_NULL) {
return KERN_INVALID_TASK;
+ }
- if (!MACH_PORT_VALID(name))
+ if (!MACH_PORT_VALID(name)) {
return KERN_SUCCESS;
+ }
kr = ipc_right_lookup_write(space, name, &entry);
- if (kr != KERN_SUCCESS)
+ if (kr != KERN_SUCCESS) {
+ mach_port_guard_exception(name, 0, 0, kGUARD_EXC_INVALID_NAME);
return kr;
+ }
/* space is write-locked */
kr = ipc_right_dealloc(space, name, entry); /* unlocks space */
kern_return_t
mach_port_get_refs(
- ipc_space_t space,
- mach_port_name_t name,
- mach_port_right_t right,
- mach_port_urefs_t *urefsp)
+ ipc_space_t space,
+ mach_port_name_t name,
+ mach_port_right_t right,
+ mach_port_urefs_t *urefsp)
{
mach_port_type_t type;
mach_port_urefs_t urefs;
ipc_entry_t entry;
kern_return_t kr;
- if (space == IS_NULL)
+ if (space == IS_NULL) {
return KERN_INVALID_TASK;
+ }
- if (right >= MACH_PORT_RIGHT_NUMBER)
+ if (right >= MACH_PORT_RIGHT_NUMBER) {
return KERN_INVALID_VALUE;
+ }
if (!MACH_PORT_VALID(name)) {
- if (right == MACH_PORT_RIGHT_SEND ||
+ if (right == MACH_PORT_RIGHT_SEND ||
right == MACH_PORT_RIGHT_SEND_ONCE) {
*urefsp = 1;
return KERN_SUCCESS;
}
kr = ipc_right_lookup_write(space, name, &entry);
- if (kr != KERN_SUCCESS)
+ if (kr != KERN_SUCCESS) {
return kr;
+ }
/* space is write-locked and active */
kr = ipc_right_info(space, name, entry, &type, &urefs);
/* space is unlocked */
- if (kr != KERN_SUCCESS)
- return kr;
+ if (kr != KERN_SUCCESS) {
+ return kr;
+ }
- if (type & MACH_PORT_TYPE(right))
+ if (type & MACH_PORT_TYPE(right)) {
switch (right) {
- case MACH_PORT_RIGHT_SEND_ONCE:
+ case MACH_PORT_RIGHT_SEND_ONCE:
assert(urefs == 1);
- /* fall-through */
+ /* fall-through */
- case MACH_PORT_RIGHT_PORT_SET:
- case MACH_PORT_RIGHT_RECEIVE:
+ case MACH_PORT_RIGHT_PORT_SET:
+ case MACH_PORT_RIGHT_RECEIVE:
*urefsp = 1;
break;
- case MACH_PORT_RIGHT_DEAD_NAME:
- case MACH_PORT_RIGHT_SEND:
+ case MACH_PORT_RIGHT_DEAD_NAME:
+ case MACH_PORT_RIGHT_SEND:
assert(urefs > 0);
*urefsp = urefs;
break;
- default:
+ default:
panic("mach_port_get_refs: strange rights");
}
- else
+ } else {
*urefsp = 0;
+ }
return kr;
}
kern_return_t
mach_port_mod_refs(
- ipc_space_t space,
- mach_port_name_t name,
- mach_port_right_t right,
- mach_port_delta_t delta)
+ ipc_space_t space,
+ mach_port_name_t name,
+ mach_port_right_t right,
+ mach_port_delta_t delta)
{
ipc_entry_t entry;
kern_return_t kr;
- if (space == IS_NULL)
+ if (space == IS_NULL) {
return KERN_INVALID_TASK;
+ }
- if (right >= MACH_PORT_RIGHT_NUMBER)
+ if (right >= MACH_PORT_RIGHT_NUMBER) {
return KERN_INVALID_VALUE;
+ }
if (!MACH_PORT_VALID(name)) {
if (right == MACH_PORT_RIGHT_SEND ||
- right == MACH_PORT_RIGHT_SEND_ONCE)
+ right == MACH_PORT_RIGHT_SEND_ONCE) {
return KERN_SUCCESS;
+ }
return KERN_INVALID_NAME;
}
kr = ipc_right_lookup_write(space, name, &entry);
- if (kr != KERN_SUCCESS)
+ if (kr != KERN_SUCCESS) {
+ mach_port_guard_exception(name, 0, 0, kGUARD_EXC_INVALID_NAME);
return kr;
+ }
+
/* space is write-locked and active */
- kr = ipc_right_delta(space, name, entry, right, delta); /* unlocks */
+ kr = ipc_right_delta(space, name, entry, right, delta); /* unlocks */
return kr;
}
+/*
+ * Routine: mach_port_peek [kernel call]
+ * Purpose:
+ * Peek at the message queue for the specified receive
+ * right and return info about a message in the queue.
+ *
+ * On input, seqnop points to a sequence number value
+ * to match the message being peeked. If zero is specified
+ * as the seqno, the first message in the queue will be
+ * peeked.
+ *
+ * Only the following trailer types are currently supported:
+ * MACH_RCV_TRAILER_TYPE(MACH_MSG_TRAILER_FORMAT_0)
+ *
+ * or'ed with one of these element types:
+ * MACH_RCV_TRAILER_ELEMENTS(MACH_RCV_TRAILER_NULL)
+ * MACH_RCV_TRAILER_ELEMENTS(MACH_RCV_TRAILER_SEQNO)
+ * MACH_RCV_TRAILER_ELEMENTS(MACH_RCV_TRAILER_SENDER)
+ * MACH_RCV_TRAILER_ELEMENTS(MACH_RCV_TRAILER_AUDIT)
+ *
+ * On input, the value pointed to by trailer_sizep must be
+ * large enough to hold the requested trailer size.
+ *
+ * The message sequence number, id, size, requested trailer info
+ * and requested trailer size are returned in their respective
+ * output parameters upon success.
+ *
+ * Conditions:
+ * Nothing locked.
+ * Returns:
+ * KERN_SUCCESS Matching message found, out parameters set.
+ * KERN_INVALID_TASK The space is null or dead.
+ * KERN_INVALID_NAME The name doesn't denote a right.
+ * KERN_INVALID_RIGHT Name doesn't denote receive rights.
+ * KERN_INVALID_VALUE The input parameter values are out of bounds.
+ * KERN_FAILURE The requested message was not found.
+ */
+
+kern_return_t
+mach_port_peek(
+ ipc_space_t space,
+ mach_port_name_t name,
+ mach_msg_trailer_type_t trailer_type,
+ mach_port_seqno_t *seqnop,
+ mach_msg_size_t *msg_sizep,
+ mach_msg_id_t *msg_idp,
+ mach_msg_trailer_info_t trailer_infop,
+ mach_msg_type_number_t *trailer_sizep)
+{
+ ipc_port_t port;
+ kern_return_t kr;
+ boolean_t found;
+ mach_msg_max_trailer_t max_trailer;
+
+ if (space == IS_NULL) {
+ return KERN_INVALID_TASK;
+ }
+
+ if (!MACH_PORT_VALID(name)) {
+ return KERN_INVALID_RIGHT;
+ }
+
+ /*
+ * We don't allow anything greater than the audit trailer - to avoid
+ * leaking the context pointer and to avoid variable-sized context issues.
+ */
+ if (GET_RCV_ELEMENTS(trailer_type) > MACH_RCV_TRAILER_AUDIT ||
+ REQUESTED_TRAILER_SIZE(TRUE, trailer_type) > *trailer_sizep) {
+ mach_port_guard_exception(name, 0, 0, kGUARD_EXC_INVALID_VALUE);
+ return KERN_INVALID_VALUE;
+ }
+
+ *trailer_sizep = REQUESTED_TRAILER_SIZE(TRUE, trailer_type);
+
+ kr = ipc_port_translate_receive(space, name, &port);
+ if (kr != KERN_SUCCESS) {
+ mach_port_guard_exception(name, 0, 0,
+ ((KERN_INVALID_NAME == kr) ?
+ kGUARD_EXC_INVALID_NAME :
+ kGUARD_EXC_INVALID_RIGHT));
+ return kr;
+ }
+
+ /* Port locked and active */
+
+ found = ipc_mqueue_peek(&port->ip_messages, seqnop,
+ msg_sizep, msg_idp, &max_trailer, NULL);
+ ip_unlock(port);
+
+ if (found != TRUE) {
+ return KERN_FAILURE;
+ }
+
+ max_trailer.msgh_seqno = *seqnop;
+ memcpy(trailer_infop, &max_trailer, *trailer_sizep);
+
+ return KERN_SUCCESS;
+}
+
/*
* Routine: mach_port_set_mscount [kernel call]
* Purpose:
kern_return_t
mach_port_set_mscount(
- ipc_space_t space,
- mach_port_name_t name,
- mach_port_mscount_t mscount)
+ ipc_space_t space,
+ mach_port_name_t name,
+ mach_port_mscount_t mscount)
{
ipc_port_t port;
kern_return_t kr;
- if (space == IS_NULL)
+ if (space == IS_NULL) {
return KERN_INVALID_TASK;
+ }
- if (!MACH_PORT_VALID(name))
+ if (!MACH_PORT_VALID(name)) {
return KERN_INVALID_RIGHT;
+ }
kr = ipc_port_translate_receive(space, name, &port);
- if (kr != KERN_SUCCESS)
+ if (kr != KERN_SUCCESS) {
return kr;
+ }
/* port is locked and active */
- ipc_port_set_mscount(port, mscount);
-
+ port->ip_mscount = mscount;
ip_unlock(port);
return KERN_SUCCESS;
}
kern_return_t
mach_port_set_seqno(
- ipc_space_t space,
- mach_port_name_t name,
- mach_port_seqno_t seqno)
+ ipc_space_t space,
+ mach_port_name_t name,
+ mach_port_seqno_t seqno)
{
ipc_port_t port;
kern_return_t kr;
- if (space == IS_NULL)
+ if (space == IS_NULL) {
return KERN_INVALID_TASK;
+ }
- if (!MACH_PORT_VALID(name))
+ if (!MACH_PORT_VALID(name)) {
return KERN_INVALID_RIGHT;
+ }
kr = ipc_port_translate_receive(space, name, &port);
- if (kr != KERN_SUCCESS)
+ if (kr != KERN_SUCCESS) {
return kr;
+ }
/* port is locked and active */
ipc_mqueue_set_seqno(&port->ip_messages, seqno);
kern_return_t
mach_port_get_context(
- ipc_space_t space,
- mach_port_name_t name,
- mach_vm_address_t *context)
+ ipc_space_t space,
+ mach_port_name_t name,
+ mach_vm_address_t *context)
{
ipc_port_t port;
kern_return_t kr;
- if (space == IS_NULL)
+ if (space == IS_NULL) {
return KERN_INVALID_TASK;
+ }
- if (!MACH_PORT_VALID(name))
+ if (!MACH_PORT_VALID(name)) {
return KERN_INVALID_RIGHT;
+ }
kr = ipc_port_translate_receive(space, name, &port);
- if (kr != KERN_SUCCESS)
+ if (kr != KERN_SUCCESS) {
return kr;
+ }
- /* port is locked and active */
- *context = port->ip_context;
+ /* Port locked and active */
+
+ /* For strictly guarded ports, return empty context (which acts as guard) */
+ if (port->ip_strict_guard) {
+ *context = 0;
+ } else {
+ *context = port->ip_context;
+ }
ip_unlock(port);
return KERN_SUCCESS;
kern_return_t
mach_port_set_context(
- ipc_space_t space,
- mach_port_name_t name,
- mach_vm_address_t context)
+ ipc_space_t space,
+ mach_port_name_t name,
+ mach_vm_address_t context)
{
ipc_port_t port;
kern_return_t kr;
- if (space == IS_NULL)
+ if (space == IS_NULL) {
return KERN_INVALID_TASK;
+ }
- if (!MACH_PORT_VALID(name))
+ if (!MACH_PORT_VALID(name)) {
return KERN_INVALID_RIGHT;
+ }
kr = ipc_port_translate_receive(space, name, &port);
- if (kr != KERN_SUCCESS)
+ if (kr != KERN_SUCCESS) {
return kr;
+ }
/* port is locked and active */
+ if (port->ip_strict_guard) {
+ uint64_t portguard = port->ip_context;
+ ip_unlock(port);
+ /* For strictly guarded ports, disallow overwriting context; Raise Exception */
+ mach_port_guard_exception(name, context, portguard, kGUARD_EXC_SET_CONTEXT);
+ return KERN_INVALID_ARGUMENT;
+ }
+
port->ip_context = context;
ip_unlock(port);
}
-/*
- * Routine: mach_port_gst_helper
- * Conditions:
- * portspace is locked for both the recieve right and pset
- * under observation.
- * Purpose:
- * A helper function for mach_port_get_set_status.
- */
-
-void
-mach_port_gst_helper(
- ipc_pset_t pset,
- ipc_port_t port,
- ipc_entry_num_t maxnames,
- mach_port_name_t *names,
- ipc_entry_num_t *actualp)
-{
- mach_port_name_t name;
-
- assert(port != IP_NULL);
- /*
- * The space lock is held by the calling function,
- * hence it is OK to read name without the port lock.
- */
- assert(ip_active(port));
- name = port->ip_receiver_name;
- assert(name != MACH_PORT_NULL);
-
- if (ipc_pset_member(pset, port)) {
- ipc_entry_num_t actual = *actualp;
-
- if (actual < maxnames)
- names[actual] = name;
-
- *actualp = actual+1;
- }
-}
-
/*
* Routine: mach_port_get_set_status [kernel call]
* Purpose:
kern_return_t
mach_port_get_set_status(
- ipc_space_t space,
- mach_port_name_t name,
- mach_port_name_t **members,
- mach_msg_type_number_t *membersCnt)
+ ipc_space_t space,
+ mach_port_name_t name,
+ mach_port_name_t **members,
+ mach_msg_type_number_t *membersCnt)
{
- ipc_entry_num_t actual; /* this many members */
- ipc_entry_num_t maxnames; /* space for this many members */
+ ipc_entry_num_t actual; /* this many members */
+ ipc_entry_num_t maxnames; /* space for this many members */
kern_return_t kr;
- vm_size_t size; /* size of allocated memory */
- vm_offset_t addr; /* allocated memory */
- vm_map_copy_t memory; /* copied-in memory */
+ vm_size_t size; /* size of allocated memory */
+ vm_offset_t addr; /* allocated memory */
+ vm_map_copy_t memory; /* copied-in memory */
- if (space == IS_NULL)
+ if (space == IS_NULL) {
return KERN_INVALID_TASK;
+ }
- if (!MACH_PORT_VALID(name))
+ if (!MACH_PORT_VALID(name)) {
return KERN_INVALID_RIGHT;
+ }
- size = PAGE_SIZE; /* initial guess */
+ size = VM_MAP_PAGE_SIZE(ipc_kernel_map); /* initial guess */
for (;;) {
- ipc_entry_t entry, table;
- ipc_entry_num_t tsize;
- mach_port_index_t index;
mach_port_name_t *names;
+ ipc_object_t psobj;
ipc_pset_t pset;
- kr = vm_allocate(ipc_kernel_map, &addr, size, VM_FLAGS_ANYWHERE);
- if (kr != KERN_SUCCESS)
+ kr = vm_allocate_kernel(ipc_kernel_map, &addr, size, VM_FLAGS_ANYWHERE, VM_KERN_MEMORY_IPC);
+ if (kr != KERN_SUCCESS) {
return KERN_RESOURCE_SHORTAGE;
+ }
/* can't fault while we hold locks */
- kr = vm_map_wire(ipc_kernel_map, addr, addr + size,
- VM_PROT_READ|VM_PROT_WRITE, FALSE);
+ kr = vm_map_wire_kernel(ipc_kernel_map, addr, addr + size,
+ VM_PROT_READ | VM_PROT_WRITE, VM_KERN_MEMORY_IPC, FALSE);
assert(kr == KERN_SUCCESS);
- kr = ipc_right_lookup_read(space, name, &entry);
+ kr = ipc_object_translate(space, name, MACH_PORT_RIGHT_PORT_SET, &psobj);
if (kr != KERN_SUCCESS) {
kmem_free(ipc_kernel_map, addr, size);
return kr;
}
- /* space is read-locked and active */
-
- if (IE_BITS_TYPE(entry->ie_bits) != MACH_PORT_TYPE_PORT_SET) {
- is_read_unlock(space);
- kmem_free(ipc_kernel_map, addr, size);
- return KERN_INVALID_RIGHT;
- }
- pset = (ipc_pset_t) entry->ie_object;
- assert(pset != IPS_NULL);
- /* the port set must be active */
+ /* just use a portset reference from here on out */
+ pset = ips_object_to_pset(psobj);
+ ips_reference(pset);
+ ips_unlock(pset);
names = (mach_port_name_t *) addr;
maxnames = (ipc_entry_num_t)(size / sizeof(mach_port_name_t));
- actual = 0;
-
- table = space->is_table;
- tsize = space->is_table_size;
-
- for (index = 0; index < tsize; index++) {
- ipc_entry_t ientry = &table[index];
- ipc_port_t port = (ipc_port_t) ientry->ie_object;
- if (ientry->ie_bits & MACH_PORT_TYPE_RECEIVE &&
- port->ip_pset_count > 0) {
- mach_port_gst_helper(pset, port,
- maxnames, names, &actual);
- }
- }
+ ipc_mqueue_set_gather_member_names(space, &pset->ips_messages, maxnames, names, &actual);
- is_read_unlock(space);
+ /* release the portset reference */
+ ips_release(pset);
- if (actual <= maxnames)
+ if (actual <= maxnames) {
break;
+ }
/* didn't have enough memory; allocate more */
-
kmem_free(ipc_kernel_map, addr, size);
- size = round_page(actual * sizeof(mach_port_name_t)) + PAGE_SIZE;
+ size = vm_map_round_page(
+ (actual * sizeof(mach_port_name_t)),
+ VM_MAP_PAGE_MASK(ipc_kernel_map)) +
+ VM_MAP_PAGE_SIZE(ipc_kernel_map);
}
if (actual == 0) {
vm_size_t vm_size_used;
size_used = actual * sizeof(mach_port_name_t);
- vm_size_used = round_page(size_used);
+ vm_size_used = vm_map_round_page(
+ size_used,
+ VM_MAP_PAGE_MASK(ipc_kernel_map));
/*
* Make used memory pageable and get it into
* copied-in form. Free any unused memory.
*/
- kr = vm_map_unwire(ipc_kernel_map, vm_map_trunc_page(addr),
- vm_map_round_page(addr + vm_size_used), FALSE);
+ kr = vm_map_unwire(
+ ipc_kernel_map,
+ vm_map_trunc_page(addr,
+ VM_MAP_PAGE_MASK(ipc_kernel_map)),
+ vm_map_round_page(addr + vm_size_used,
+ VM_MAP_PAGE_MASK(ipc_kernel_map)),
+ FALSE);
assert(kr == KERN_SUCCESS);
kr = vm_map_copyin(ipc_kernel_map, (vm_map_address_t)addr,
- (vm_map_size_t)size_used, TRUE, &memory);
+ (vm_map_size_t)size_used, TRUE, &memory);
assert(kr == KERN_SUCCESS);
- if (vm_size_used != size)
+ if (vm_size_used != size) {
kmem_free(ipc_kernel_map,
- addr + vm_size_used, size - vm_size_used);
+ addr + vm_size_used, size - vm_size_used);
+ }
}
*members = (mach_port_name_t *) memory;
kern_return_t
mach_port_move_member(
- ipc_space_t space,
- mach_port_name_t member,
- mach_port_name_t after)
+ ipc_space_t space,
+ mach_port_name_t member,
+ mach_port_name_t after)
{
- ipc_entry_t entry;
+ ipc_object_t port_obj, ps_obj;
ipc_port_t port;
- ipc_pset_t nset;
+ ipc_pset_t nset = IPS_NULL;
kern_return_t kr;
- wait_queue_link_t wql;
- queue_head_t links_data;
- queue_t links = &links_data;
+ uint64_t wq_link_id = 0;
+ uint64_t wq_reserved_prepost = 0;
- if (space == IS_NULL)
+ if (space == IS_NULL) {
return KERN_INVALID_TASK;
+ }
- if (!MACH_PORT_VALID(member))
- return KERN_INVALID_RIGHT;
-
- if (after == MACH_PORT_DEAD)
+ if (!MACH_PORT_VALID(member)) {
return KERN_INVALID_RIGHT;
- else if (after == MACH_PORT_NULL)
- wql = WAIT_QUEUE_LINK_NULL;
- else
- wql = wait_queue_link_allocate();
-
- queue_init(links);
-
- kr = ipc_right_lookup_read(space, member, &entry);
- if (kr != KERN_SUCCESS)
- goto done;
- /* space is read-locked and active */
-
- if ((entry->ie_bits & MACH_PORT_TYPE_RECEIVE) == 0) {
- is_read_unlock(space);
- kr = KERN_INVALID_RIGHT;
- goto done;
}
- port = (ipc_port_t) entry->ie_object;
- assert(port != IP_NULL);
-
- if (after == MACH_PORT_NULL)
- nset = IPS_NULL;
- else {
- entry = ipc_entry_lookup(space, after);
- if (entry == IE_NULL) {
- is_read_unlock(space);
- kr = KERN_INVALID_NAME;
+ if (after == MACH_PORT_DEAD) {
+ return KERN_INVALID_RIGHT;
+ } else if (after == MACH_PORT_NULL) {
+ wq_link_id = 0;
+ } else {
+ /*
+ * We reserve both a link, and
+ * enough prepost objects to complete
+ * the set move atomically - we can't block
+ * while we're holding the space lock, and
+ * the ipc_pset_add calls ipc_mqueue_add
+ * which may have to prepost this port onto
+ * this set.
+ */
+ wq_link_id = waitq_link_reserve(NULL);
+ wq_reserved_prepost = waitq_prepost_reserve(NULL, 10,
+ WAITQ_DONT_LOCK);
+ kr = ipc_pset_lazy_allocate(space, after);
+ if (kr != KERN_SUCCESS) {
goto done;
}
+ }
- if ((entry->ie_bits & MACH_PORT_TYPE_PORT_SET) == 0) {
- is_read_unlock(space);
- kr = KERN_INVALID_RIGHT;
- goto done;
- }
+ if (after != MACH_PORT_NULL) {
+ kr = ipc_object_translate_two(space,
+ member, MACH_PORT_RIGHT_RECEIVE, &port_obj,
+ after, MACH_PORT_RIGHT_PORT_SET, &ps_obj);
+ } else {
+ kr = ipc_object_translate(space,
+ member, MACH_PORT_RIGHT_RECEIVE, &port_obj);
+ }
+ if (kr != KERN_SUCCESS) {
+ goto done;
+ }
- nset = (ipc_pset_t) entry->ie_object;
- assert(nset != IPS_NULL);
+ port = ip_object_to_port(port_obj);
+ if (after != MACH_PORT_NULL) {
+ nset = ips_object_to_pset(ps_obj);
}
- ip_lock(port);
- ipc_pset_remove_from_all(port, links);
+ /* port and nset are locked */
+
+ ipc_pset_remove_from_all(port);
- if (nset != IPS_NULL) {
- ips_lock(nset);
- kr = ipc_pset_add(nset, port, wql);
+ if (after != MACH_PORT_NULL) {
+ kr = ipc_pset_add(nset, port, &wq_link_id, &wq_reserved_prepost);
ips_unlock(nset);
}
+
ip_unlock(port);
- is_read_unlock(space);
- done:
- if (kr != KERN_SUCCESS && wql != WAIT_QUEUE_LINK_NULL)
- wait_queue_link_free(wql);
- while(!queue_empty(links)) {
- wql = (wait_queue_link_t) dequeue(links);
- wait_queue_link_free(wql);
- }
+done:
+ /*
+ * on success the ipc_pset_add() will consume the wq_link_id
+ * value (resetting it to 0), so this function is always safe to call.
+ */
+ waitq_link_release(wq_link_id);
+ waitq_prepost_release_reserve(wq_reserved_prepost);
return kr;
}
* KERN_INVALID_CAPABILITY The notify port is dead.
* MACH_NOTIFY_PORT_DESTROYED:
* KERN_INVALID_VALUE Sync isn't zero.
+ * KERN_FAILURE Re-registering for this notification
* MACH_NOTIFY_DEAD_NAME:
* KERN_RESOURCE_SHORTAGE Couldn't allocate memory.
* KERN_INVALID_ARGUMENT Name denotes dead name, but
kern_return_t
mach_port_request_notification(
- ipc_space_t space,
- mach_port_name_t name,
- mach_msg_id_t id,
- mach_port_mscount_t sync,
- ipc_port_t notify,
- ipc_port_t *previousp)
+ ipc_space_t space,
+ mach_port_name_t name,
+ mach_msg_id_t id,
+ mach_port_mscount_t sync,
+ ipc_port_t notify,
+ ipc_port_t *previousp)
{
kern_return_t kr;
- if (space == IS_NULL)
+ if (space == IS_NULL) {
return KERN_INVALID_TASK;
+ }
- if (notify == IP_DEAD)
+ if (notify == IP_DEAD) {
return KERN_INVALID_CAPABILITY;
+ }
-#if NOTYET
+#if NOTYET
/*
* Requesting notifications on RPC ports is an error.
*/
{
ipc_port_t port;
- ipc_entry_t entry;
+ ipc_entry_t entry;
- kr = ipc_right_lookup_write(space, name, &entry);
- if (kr != KERN_SUCCESS)
+ kr = ipc_right_lookup_write(space, name, &entry);
+ if (kr != KERN_SUCCESS) {
return kr;
+ }
- port = (ipc_port_t) entry->ie_object;
+ port = ip_object_to_port(entry->ie_object);
if (port->ip_subsystem != NULL) {
is_write_unlock(space);
- panic("mach_port_request_notification: on RPC port!!");
+ panic("mach_port_request_notification: on RPC port!!");
return KERN_INVALID_CAPABILITY;
}
is_write_unlock(space);
}
-#endif /* NOTYET */
+#endif /* NOTYET */
switch (id) {
- case MACH_NOTIFY_PORT_DESTROYED: {
- ipc_port_t port, previous;
+ case MACH_NOTIFY_PORT_DESTROYED: {
+ ipc_port_t port;
- if (sync != 0)
+ if (sync != 0) {
return KERN_INVALID_VALUE;
+ }
- if (!MACH_PORT_VALID(name))
+ if (!MACH_PORT_VALID(name)) {
return KERN_INVALID_RIGHT;
+ }
kr = ipc_port_translate_receive(space, name, &port);
- if (kr != KERN_SUCCESS)
+ if (kr != KERN_SUCCESS) {
return kr;
+ }
/* port is locked and active */
- ipc_port_pdrequest(port, notify, &previous);
- /* port is unlocked */
+ /* you cannot register for port death notifications on a kobject */
+ if (ip_kotype(port) != IKOT_NONE) {
+ ip_unlock(port);
+ return KERN_INVALID_RIGHT;
+ }
+
+ /* Allow only one registeration of this notification */
+ if (port->ip_pdrequest != IP_NULL) {
+ ip_unlock(port);
+ mach_port_guard_exception(name, 0, 0, kGUARD_EXC_KERN_FAILURE);
+ return KERN_FAILURE;
+ }
- *previousp = previous;
+ ipc_port_pdrequest(port, notify, previousp);
+ /* port is unlocked */
+ assert(*previousp == IP_NULL);
break;
- }
+ }
- case MACH_NOTIFY_NO_SENDERS: {
+ case MACH_NOTIFY_NO_SENDERS: {
ipc_port_t port;
- if (!MACH_PORT_VALID(name))
+ if (!MACH_PORT_VALID(name)) {
return KERN_INVALID_RIGHT;
+ }
kr = ipc_port_translate_receive(space, name, &port);
- if (kr != KERN_SUCCESS)
+ if (kr != KERN_SUCCESS) {
return kr;
+ }
/* port is locked and active */
ipc_port_nsrequest(port, sync, notify, previousp);
/* port is unlocked */
break;
- }
+ }
- case MACH_NOTIFY_SEND_POSSIBLE:
+ case MACH_NOTIFY_SEND_POSSIBLE:
- if (!MACH_PORT_VALID(name)) {
- return KERN_INVALID_ARGUMENT;
+ if (!MACH_PORT_VALID(name)) {
+ return KERN_INVALID_ARGUMENT;
}
kr = ipc_right_request_alloc(space, name, sync != 0,
- TRUE, notify, previousp);
- if (kr != KERN_SUCCESS)
+ TRUE, notify, previousp);
+ if (kr != KERN_SUCCESS) {
return kr;
+ }
break;
- case MACH_NOTIFY_DEAD_NAME:
+ case MACH_NOTIFY_DEAD_NAME:
- if (!MACH_PORT_VALID(name)) {
+ if (!MACH_PORT_VALID(name)) {
/*
* Already dead.
* Should do immediate delivery check -
* will do that in the near future.
*/
- return KERN_INVALID_ARGUMENT;
+ return KERN_INVALID_ARGUMENT;
}
kr = ipc_right_request_alloc(space, name, sync != 0,
- FALSE, notify, previousp);
- if (kr != KERN_SUCCESS)
+ FALSE, notify, previousp);
+ if (kr != KERN_SUCCESS) {
return kr;
+ }
break;
- default:
+ default:
return KERN_INVALID_VALUE;
}
kern_return_t
mach_port_insert_right(
- ipc_space_t space,
- mach_port_name_t name,
- ipc_port_t poly,
- mach_msg_type_name_t polyPoly)
+ ipc_space_t space,
+ mach_port_name_t name,
+ ipc_port_t poly,
+ mach_msg_type_name_t polyPoly)
{
- if (space == IS_NULL)
+ if (space == IS_NULL) {
return KERN_INVALID_TASK;
+ }
if (!MACH_PORT_VALID(name) ||
- !MACH_MSG_TYPE_PORT_ANY_RIGHT(polyPoly))
+ !MACH_MSG_TYPE_PORT_ANY_RIGHT(polyPoly)) {
return KERN_INVALID_VALUE;
+ }
- if (!IO_VALID((ipc_object_t) poly))
+ if (!IP_VALID(poly)) {
return KERN_INVALID_CAPABILITY;
+ }
- return ipc_object_copyout_name(space, (ipc_object_t) poly,
- polyPoly, FALSE, name);
+ return ipc_object_copyout_name(space, ip_to_object(poly),
+ polyPoly, name);
}
/*
kern_return_t
mach_port_extract_right(
- ipc_space_t space,
- mach_port_name_t name,
- mach_msg_type_name_t msgt_name,
- ipc_port_t *poly,
- mach_msg_type_name_t *polyPoly)
+ ipc_space_t space,
+ mach_port_name_t name,
+ mach_msg_type_name_t msgt_name,
+ ipc_port_t *poly,
+ mach_msg_type_name_t *polyPoly)
{
kern_return_t kr;
- if (space == IS_NULL)
+ if (space == IS_NULL) {
return KERN_INVALID_TASK;
+ }
- if (!MACH_MSG_TYPE_PORT_ANY(msgt_name))
+ if (!MACH_MSG_TYPE_PORT_ANY(msgt_name)) {
return KERN_INVALID_VALUE;
+ }
if (!MACH_PORT_VALID(name)) {
/*
return KERN_INVALID_RIGHT;
}
- kr = ipc_object_copyin(space, name, msgt_name, (ipc_object_t *) poly);
+ kr = ipc_object_copyin(space, name, msgt_name, (ipc_object_t *) poly, 0, NULL,
+ IPC_KMSG_FLAGS_ALLOW_IMMOVABLE_SEND);
- if (kr == KERN_SUCCESS)
+ if (kr == KERN_SUCCESS) {
*polyPoly = ipc_object_copyin_type(msgt_name);
+ }
return kr;
}
+/*
+ * Routine: mach_port_get_status_helper [helper]
+ * Purpose:
+ * Populates a mach_port_status_t structure with
+ * port information.
+ * Conditions:
+ * Port needs to be locked
+ * Returns:
+ * None.
+ */
+static void
+mach_port_get_status_helper(
+ ipc_port_t port,
+ mach_port_status_t *statusp)
+{
+ imq_lock(&port->ip_messages);
+ /* don't leak set IDs, just indicate that the port is in one or not */
+ statusp->mps_pset = !!(port->ip_in_pset);
+ statusp->mps_seqno = port->ip_messages.imq_seqno;
+ statusp->mps_qlimit = port->ip_messages.imq_qlimit;
+ statusp->mps_msgcount = port->ip_messages.imq_msgcount;
+ imq_unlock(&port->ip_messages);
+
+ statusp->mps_mscount = port->ip_mscount;
+ statusp->mps_sorights = port->ip_sorights;
+ statusp->mps_srights = port->ip_srights > 0;
+ statusp->mps_pdrequest = port->ip_pdrequest != IP_NULL;
+ statusp->mps_nsrequest = port->ip_nsrequest != IP_NULL;
+ statusp->mps_flags = 0;
+ if (port->ip_impdonation) {
+ statusp->mps_flags |= MACH_PORT_STATUS_FLAG_IMP_DONATION;
+ if (port->ip_tempowner) {
+ statusp->mps_flags |= MACH_PORT_STATUS_FLAG_TEMPOWNER;
+ if (IIT_NULL != port->ip_imp_task) {
+ statusp->mps_flags |= MACH_PORT_STATUS_FLAG_TASKPTR;
+ }
+ }
+ }
+ if (port->ip_guarded) {
+ statusp->mps_flags |= MACH_PORT_STATUS_FLAG_GUARDED;
+ if (port->ip_strict_guard) {
+ statusp->mps_flags |= MACH_PORT_STATUS_FLAG_STRICT_GUARD;
+ }
+ if (port->ip_immovable_receive) {
+ statusp->mps_flags |= MACH_PORT_STATUS_FLAG_GUARD_IMMOVABLE_RECEIVE;
+ }
+ }
+ if (port->ip_no_grant) {
+ statusp->mps_flags |= MACH_PORT_STATUS_FLAG_NO_GRANT;
+ }
+ return;
+}
+
+
kern_return_t
mach_port_get_attributes(
- ipc_space_t space,
- mach_port_name_t name,
- int flavor,
- mach_port_info_t info,
- mach_msg_type_number_t *count)
+ ipc_space_t space,
+ mach_port_name_t name,
+ int flavor,
+ mach_port_info_t info,
+ mach_msg_type_number_t *count)
{
ipc_port_t port;
kern_return_t kr;
- if (space == IS_NULL)
+ if (space == IS_NULL) {
return KERN_INVALID_TASK;
+ }
- switch (flavor) {
- case MACH_PORT_LIMITS_INFO: {
- mach_port_limits_t *lp = (mach_port_limits_t *)info;
+ switch (flavor) {
+ case MACH_PORT_LIMITS_INFO: {
+ mach_port_limits_t *lp = (mach_port_limits_t *)info;
- if (*count < MACH_PORT_LIMITS_INFO_COUNT)
- return KERN_FAILURE;
+ if (*count < MACH_PORT_LIMITS_INFO_COUNT) {
+ return KERN_FAILURE;
+ }
- if (!MACH_PORT_VALID(name)) {
+ if (!MACH_PORT_VALID(name)) {
*count = 0;
break;
}
-
- kr = ipc_port_translate_receive(space, name, &port);
- if (kr != KERN_SUCCESS)
- return kr;
- /* port is locked and active */
-
- lp->mpl_qlimit = port->ip_messages.imq_qlimit;
- *count = MACH_PORT_LIMITS_INFO_COUNT;
- ip_unlock(port);
- break;
- }
-
- case MACH_PORT_RECEIVE_STATUS: {
- mach_port_status_t *statusp = (mach_port_status_t *)info;
- spl_t s;
-
- if (*count < MACH_PORT_RECEIVE_STATUS_COUNT)
- return KERN_FAILURE;
-
- if (!MACH_PORT_VALID(name))
+
+ kr = ipc_port_translate_receive(space, name, &port);
+ if (kr != KERN_SUCCESS) {
+ return kr;
+ }
+ /* port is locked and active */
+
+ lp->mpl_qlimit = port->ip_messages.imq_qlimit;
+ *count = MACH_PORT_LIMITS_INFO_COUNT;
+ ip_unlock(port);
+ break;
+ }
+
+ case MACH_PORT_RECEIVE_STATUS: {
+ mach_port_status_t *statusp = (mach_port_status_t *)info;
+
+ if (*count < MACH_PORT_RECEIVE_STATUS_COUNT) {
+ return KERN_FAILURE;
+ }
+
+ if (!MACH_PORT_VALID(name)) {
return KERN_INVALID_RIGHT;
+ }
+
+ kr = ipc_port_translate_receive(space, name, &port);
+ if (kr != KERN_SUCCESS) {
+ return kr;
+ }
+ /* port is locked and active */
+ mach_port_get_status_helper(port, statusp);
+ *count = MACH_PORT_RECEIVE_STATUS_COUNT;
+ ip_unlock(port);
+ break;
+ }
- kr = ipc_port_translate_receive(space, name, &port);
- if (kr != KERN_SUCCESS)
- return kr;
- /* port is locked and active */
-
- statusp->mps_pset = port->ip_pset_count;
-
- s = splsched();
- imq_lock(&port->ip_messages);
- statusp->mps_seqno = port->ip_messages.imq_seqno;
- statusp->mps_qlimit = port->ip_messages.imq_qlimit;
- statusp->mps_msgcount = port->ip_messages.imq_msgcount;
- imq_unlock(&port->ip_messages);
- splx(s);
-
- statusp->mps_mscount = port->ip_mscount;
- statusp->mps_sorights = port->ip_sorights;
- statusp->mps_srights = port->ip_srights > 0;
- statusp->mps_pdrequest = port->ip_pdrequest != IP_NULL;
- statusp->mps_nsrequest = port->ip_nsrequest != IP_NULL;
- statusp->mps_flags = 0;
-
- *count = MACH_PORT_RECEIVE_STATUS_COUNT;
- ip_unlock(port);
- break;
- }
-
case MACH_PORT_DNREQUESTS_SIZE: {
- ipc_port_request_t table;
-
- if (*count < MACH_PORT_DNREQUESTS_SIZE_COUNT)
- return KERN_FAILURE;
+ ipc_port_request_t table;
+
+ if (*count < MACH_PORT_DNREQUESTS_SIZE_COUNT) {
+ return KERN_FAILURE;
+ }
if (!MACH_PORT_VALID(name)) {
*(int *)info = 0;
break;
}
- kr = ipc_port_translate_receive(space, name, &port);
- if (kr != KERN_SUCCESS)
- return kr;
- /* port is locked and active */
-
+ kr = ipc_port_translate_receive(space, name, &port);
+ if (kr != KERN_SUCCESS) {
+ return kr;
+ }
+ /* port is locked and active */
+
table = port->ip_requests;
- if (table == IPR_NULL)
+ if (table == IPR_NULL) {
*(int *)info = 0;
- else
+ } else {
*(int *)info = table->ipr_size->its_size;
- *count = MACH_PORT_DNREQUESTS_SIZE_COUNT;
- ip_unlock(port);
+ }
+ *count = MACH_PORT_DNREQUESTS_SIZE_COUNT;
+ ip_unlock(port);
break;
}
- default:
+ case MACH_PORT_INFO_EXT: {
+ mach_port_info_ext_t *mp_info = (mach_port_info_ext_t *)info;
+ if (*count < MACH_PORT_INFO_EXT_COUNT) {
+ return KERN_FAILURE;
+ }
+
+ if (!MACH_PORT_VALID(name)) {
+ return KERN_INVALID_RIGHT;
+ }
+
+ kr = ipc_port_translate_receive(space, name, &port);
+ if (kr != KERN_SUCCESS) {
+ return kr;
+ }
+ /* port is locked and active */
+ mach_port_get_status_helper(port, &mp_info->mpie_status);
+ mp_info->mpie_boost_cnt = port->ip_impcount;
+ *count = MACH_PORT_INFO_EXT_COUNT;
+ ip_unlock(port);
+ break;
+ }
+
+ default:
return KERN_INVALID_ARGUMENT;
- /*NOTREACHED*/
- }
+ /*NOTREACHED*/
+ }
return KERN_SUCCESS;
}
kern_return_t
mach_port_set_attributes(
- ipc_space_t space,
- mach_port_name_t name,
- int flavor,
- mach_port_info_t info,
- mach_msg_type_number_t count)
+ ipc_space_t space,
+ mach_port_name_t name,
+ int flavor,
+ mach_port_info_t info,
+ mach_msg_type_number_t count)
{
ipc_port_t port;
kern_return_t kr;
-
- if (space == IS_NULL)
+
+ if (space == IS_NULL) {
return KERN_INVALID_TASK;
+ }
+
+ switch (flavor) {
+ case MACH_PORT_LIMITS_INFO: {
+ mach_port_limits_t *mplp = (mach_port_limits_t *)info;
+
+ if (count < MACH_PORT_LIMITS_INFO_COUNT) {
+ return KERN_FAILURE;
+ }
+
+ if (mplp->mpl_qlimit > MACH_PORT_QLIMIT_MAX) {
+ return KERN_INVALID_VALUE;
+ }
- switch (flavor) {
-
- case MACH_PORT_LIMITS_INFO: {
- mach_port_limits_t *mplp = (mach_port_limits_t *)info;
-
- if (count < MACH_PORT_LIMITS_INFO_COUNT)
- return KERN_FAILURE;
-
- if (mplp->mpl_qlimit > MACH_PORT_QLIMIT_MAX)
- return KERN_INVALID_VALUE;
-
- if (!MACH_PORT_VALID(name))
+ if (!MACH_PORT_VALID(name)) {
return KERN_INVALID_RIGHT;
+ }
- kr = ipc_port_translate_receive(space, name, &port);
- if (kr != KERN_SUCCESS)
- return kr;
- /* port is locked and active */
+ kr = ipc_port_translate_receive(space, name, &port);
+ if (kr != KERN_SUCCESS) {
+ return kr;
+ }
+ /* port is locked and active */
- ipc_mqueue_set_qlimit(&port->ip_messages, mplp->mpl_qlimit);
- ip_unlock(port);
- break;
- }
+ ipc_mqueue_set_qlimit(&port->ip_messages, mplp->mpl_qlimit);
+ ip_unlock(port);
+ break;
+ }
case MACH_PORT_DNREQUESTS_SIZE: {
- if (count < MACH_PORT_DNREQUESTS_SIZE_COUNT)
- return KERN_FAILURE;
+ if (count < MACH_PORT_DNREQUESTS_SIZE_COUNT) {
+ return KERN_FAILURE;
+ }
- if (!MACH_PORT_VALID(name))
+ if (!MACH_PORT_VALID(name)) {
return KERN_INVALID_RIGHT;
-
- kr = ipc_port_translate_receive(space, name, &port);
- if (kr != KERN_SUCCESS)
- return kr;
- /* port is locked and active */
-
+ }
+
+ kr = ipc_port_translate_receive(space, name, &port);
+ if (kr != KERN_SUCCESS) {
+ return kr;
+ }
+ /* port is locked and active */
+
kr = ipc_port_request_grow(port, *(int *)info);
- if (kr != KERN_SUCCESS)
+ if (kr != KERN_SUCCESS) {
return kr;
+ }
break;
}
- default:
+ case MACH_PORT_TEMPOWNER:
+ if (!MACH_PORT_VALID(name)) {
+ return KERN_INVALID_RIGHT;
+ }
+
+ ipc_importance_task_t release_imp_task = IIT_NULL;
+ natural_t assertcnt = 0;
+
+ kr = ipc_port_translate_receive(space, name, &port);
+ if (kr != KERN_SUCCESS) {
+ return kr;
+ }
+ /* port is locked and active */
+
+ /*
+ * don't allow temp-owner importance donation if user
+ * associated it with a kobject already (timer, host_notify target),
+ * or is a special reply port.
+ */
+ if (ip_is_kobject(port) || port->ip_specialreply) {
+ ip_unlock(port);
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ if (port->ip_tempowner != 0) {
+ if (IIT_NULL != port->ip_imp_task) {
+ release_imp_task = port->ip_imp_task;
+ port->ip_imp_task = IIT_NULL;
+ assertcnt = port->ip_impcount;
+ }
+ } else {
+ assertcnt = port->ip_impcount;
+ }
+
+ port->ip_impdonation = 1;
+ port->ip_tempowner = 1;
+ ip_unlock(port);
+
+#if IMPORTANCE_INHERITANCE
+ /* drop assertions from previous destination task */
+ if (release_imp_task != IIT_NULL) {
+ assert(ipc_importance_task_is_any_receiver_type(release_imp_task));
+ if (assertcnt > 0) {
+ ipc_importance_task_drop_internal_assertion(release_imp_task, assertcnt);
+ }
+ ipc_importance_task_release(release_imp_task);
+ } else if (assertcnt > 0) {
+ release_imp_task = current_task()->task_imp_base;
+ if (release_imp_task != IIT_NULL &&
+ ipc_importance_task_is_any_receiver_type(release_imp_task)) {
+ ipc_importance_task_drop_internal_assertion(release_imp_task, assertcnt);
+ }
+ }
+#else
+ if (release_imp_task != IIT_NULL) {
+ ipc_importance_task_release(release_imp_task);
+ }
+#endif /* IMPORTANCE_INHERITANCE */
+
+ break;
+
+#if IMPORTANCE_INHERITANCE
+ case MACH_PORT_DENAP_RECEIVER:
+ case MACH_PORT_IMPORTANCE_RECEIVER:
+ if (!MACH_PORT_VALID(name)) {
+ return KERN_INVALID_RIGHT;
+ }
+
+ kr = ipc_port_translate_receive(space, name, &port);
+ if (kr != KERN_SUCCESS) {
+ return kr;
+ }
+
+ /*
+ * don't allow importance donation if user associated
+ * it with a kobject already (timer, host_notify target),
+ * or is a special reply port.
+ */
+ if (ip_is_kobject(port) || port->ip_specialreply) {
+ ip_unlock(port);
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ /* port is locked and active */
+ port->ip_impdonation = 1;
+ ip_unlock(port);
+
+ break;
+#endif /* IMPORTANCE_INHERITANCE */
+
+ default:
return KERN_INVALID_ARGUMENT;
- /*NOTREACHED*/
- }
+ /*NOTREACHED*/
+ }
return KERN_SUCCESS;
}
kern_return_t
mach_port_insert_member(
- ipc_space_t space,
- mach_port_name_t name,
- mach_port_name_t psname)
+ ipc_space_t space,
+ mach_port_name_t name,
+ mach_port_name_t psname)
{
ipc_object_t obj;
ipc_object_t psobj;
kern_return_t kr;
- wait_queue_link_t wql;
+ uint64_t wq_link_id;
+ uint64_t wq_reserved_prepost;
- if (space == IS_NULL)
+ if (space == IS_NULL) {
return KERN_INVALID_TASK;
+ }
- if (!MACH_PORT_VALID(name) || !MACH_PORT_VALID(psname))
+ if (!MACH_PORT_VALID(name) || !MACH_PORT_VALID(psname)) {
return KERN_INVALID_RIGHT;
+ }
+
+ wq_link_id = waitq_link_reserve(NULL);
+ wq_reserved_prepost = waitq_prepost_reserve(NULL, 10,
+ WAITQ_DONT_LOCK);
+ kr = ipc_pset_lazy_allocate(space, psname);
+ if (kr != KERN_SUCCESS) {
+ goto done;
+ }
- wql = wait_queue_link_allocate();
- kr = ipc_object_translate_two(space,
- name, MACH_PORT_RIGHT_RECEIVE, &obj,
- psname, MACH_PORT_RIGHT_PORT_SET, &psobj);
- if (kr != KERN_SUCCESS)
+ kr = ipc_object_translate_two(space,
+ name, MACH_PORT_RIGHT_RECEIVE, &obj,
+ psname, MACH_PORT_RIGHT_PORT_SET, &psobj);
+ if (kr != KERN_SUCCESS) {
goto done;
+ }
/* obj and psobj are locked (and were locked in that order) */
assert(psobj != IO_NULL);
assert(obj != IO_NULL);
- kr = ipc_pset_add((ipc_pset_t)psobj, (ipc_port_t)obj, wql);
+ kr = ipc_pset_add(ips_object_to_pset(psobj), ip_object_to_port(obj),
+ &wq_link_id, &wq_reserved_prepost);
+
io_unlock(psobj);
io_unlock(obj);
- done:
- if (kr != KERN_SUCCESS)
- wait_queue_link_free(wql);
+done:
+ /* on success, wq_link_id is reset to 0, so this is always safe */
+ waitq_link_release(wq_link_id);
+ waitq_prepost_release_reserve(wq_reserved_prepost);
return kr;
}
kern_return_t
mach_port_extract_member(
- ipc_space_t space,
- mach_port_name_t name,
- mach_port_name_t psname)
+ ipc_space_t space,
+ mach_port_name_t name,
+ mach_port_name_t psname)
{
ipc_object_t psobj;
ipc_object_t obj;
kern_return_t kr;
- wait_queue_link_t wql = WAIT_QUEUE_LINK_NULL;
- if (space == IS_NULL)
+ if (space == IS_NULL) {
return KERN_INVALID_TASK;
+ }
- if (!MACH_PORT_VALID(name) || !MACH_PORT_VALID(psname))
+ if (!MACH_PORT_VALID(name) || !MACH_PORT_VALID(psname)) {
return KERN_INVALID_RIGHT;
+ }
- kr = ipc_object_translate_two(space,
- name, MACH_PORT_RIGHT_RECEIVE, &obj,
- psname, MACH_PORT_RIGHT_PORT_SET, &psobj);
- if (kr != KERN_SUCCESS)
+ kr = ipc_object_translate_two(space,
+ name, MACH_PORT_RIGHT_RECEIVE, &obj,
+ psname, MACH_PORT_RIGHT_PORT_SET, &psobj);
+ if (kr != KERN_SUCCESS) {
return kr;
+ }
/* obj and psobj are both locked (and were locked in that order) */
assert(psobj != IO_NULL);
assert(obj != IO_NULL);
- kr = ipc_pset_remove((ipc_pset_t)psobj, (ipc_port_t)obj, &wql);
+ kr = ipc_pset_remove(ips_object_to_pset(psobj), ip_object_to_port(obj));
+
io_unlock(psobj);
io_unlock(obj);
- if (wql != WAIT_QUEUE_LINK_NULL)
- wait_queue_link_free(wql);
-
return kr;
}
*/
kern_return_t
task_set_port_space(
- ipc_space_t space,
- int table_entries)
+ ipc_space_t space,
+ int table_entries)
{
kern_return_t kr;
-
+
+ if (space == IS_NULL) {
+ return KERN_INVALID_TASK;
+ }
+
is_write_lock(space);
if (!is_active(space)) {
}
kr = ipc_entry_grow_table(space, table_entries);
- if (kr == KERN_SUCCESS)
+ if (kr == KERN_SUCCESS) {
is_write_unlock(space);
+ }
return kr;
}
/*
- * Get a (new) label handle representing the given port's port label.
+ * Routine: mach_port_guard_locked [helper routine]
+ * Purpose:
+ * Sets a new guard for a locked port.
+ * Conditions:
+ * Port Locked.
+ * Returns:
+ * KERN_SUCCESS Port Guarded.
+ * KERN_INVALID_ARGUMENT Port already contains a context/guard.
*/
-#if CONFIG_MACF_MACH
-kern_return_t
-mach_get_label(
- ipc_space_t space,
- mach_port_name_t name,
- mach_port_name_t *outlabel)
+static kern_return_t
+mach_port_guard_locked(
+ ipc_port_t port,
+ uint64_t guard,
+ uint64_t flags)
{
- ipc_entry_t entry;
- ipc_port_t port;
- struct label outl;
- kern_return_t kr;
- int dead;
+ if (port->ip_context) {
+ return KERN_INVALID_ARGUMENT;
+ }
- if (!MACH_PORT_VALID(name))
- return KERN_INVALID_NAME;
+ int strict = (flags & MPG_STRICT)? 1 : 0;
+ int immovable_receive = (flags & MPG_IMMOVABLE_RECEIVE)? 1 : 0;
- /* Lookup the port name in the task's space. */
- kr = ipc_right_lookup_write(space, name, &entry);
- if (kr != KERN_SUCCESS)
- return kr;
+ imq_lock(&port->ip_messages);
+ port->ip_context = guard;
+ port->ip_guarded = 1;
+ port->ip_strict_guard = strict;
+ /* ip_immovable_receive bit is sticky and can't be un-guarded */
+ if (!port->ip_immovable_receive) {
+ port->ip_immovable_receive = immovable_receive;
+ }
+ imq_unlock(&port->ip_messages);
- port = (ipc_port_t) entry->ie_object;
- dead = ipc_right_check(space, port, name, entry);
- if (dead) {
- is_write_unlock(space);
- ip_release(port);
- return KERN_INVALID_RIGHT;
+ return KERN_SUCCESS;
+}
+
+/*
+ * Routine: mach_port_unguard_locked [helper routine]
+ * Purpose:
+ * Removes guard for a locked port.
+ * Conditions:
+ * Port Locked.
+ * Returns:
+ * KERN_SUCCESS Port Unguarded.
+ * KERN_INVALID_ARGUMENT Port is either unguarded already or guard mismatch.
+ * This also raises a EXC_GUARD exception.
+ */
+static kern_return_t
+mach_port_unguard_locked(
+ ipc_port_t port,
+ mach_port_name_t name,
+ uint64_t guard)
+{
+ /* Port locked and active */
+ if (!port->ip_guarded) {
+ /* Port already unguarded; Raise exception */
+ mach_port_guard_exception(name, guard, 0, kGUARD_EXC_UNGUARDED);
+ return KERN_INVALID_ARGUMENT;
}
- /* port is now locked */
- is_write_unlock(space);
- /* Make sure we are not dealing with a label handle. */
- if (ip_kotype(port) == IKOT_LABELH) {
- /* already is a label handle! */
- ip_unlock(port);
+ if (port->ip_context != guard) {
+ /* Incorrect guard; Raise exception */
+ mach_port_guard_exception(name, guard, port->ip_context, kGUARD_EXC_INCORRECT_GUARD);
return KERN_INVALID_ARGUMENT;
}
- /* Copy the port label and stash it in a new label handle. */
- mac_port_label_init(&outl);
- mac_port_label_copy(&port->ip_label, &outl);
- kr = labelh_new_user(space, &outl, outlabel);
- ip_unlock(port);
+ imq_lock(&port->ip_messages);
+ port->ip_context = 0;
+ port->ip_guarded = port->ip_strict_guard = 0;
+ /* Don't clear the ip_immovable_receive bit */
+ imq_unlock(&port->ip_messages);
return KERN_SUCCESS;
}
-#else
-kern_return_t
-mach_get_label(
- __unused ipc_space_t space,
- __unused mach_port_name_t name,
- __unused mach_port_name_t *outlabel)
+
+
+/*
+ * Routine: mach_port_guard_exception [helper routine]
+ * Purpose:
+ * Marks the thread with AST_GUARD for mach port guard violation.
+ * Also saves exception info in thread structure.
+ * Conditions:
+ * None.
+ * Returns:
+ * KERN_FAILURE Thread marked with AST_GUARD.
+ */
+void
+mach_port_guard_exception(
+ mach_port_name_t name,
+ __unused uint64_t inguard,
+ uint64_t portguard,
+ unsigned reason)
{
- return KERN_INVALID_ARGUMENT;
+ mach_exception_code_t code = 0;
+ EXC_GUARD_ENCODE_TYPE(code, GUARD_TYPE_MACH_PORT);
+ EXC_GUARD_ENCODE_FLAVOR(code, reason);
+ EXC_GUARD_ENCODE_TARGET(code, name);
+ mach_exception_subcode_t subcode = (uint64_t)portguard;
+ thread_t t = current_thread();
+ boolean_t fatal = FALSE;
+ if (t->task->task_exc_guard & TASK_EXC_GUARD_MP_FATAL) {
+ fatal = TRUE;
+ } else if (reason <= MAX_FATAL_kGUARD_EXC_CODE) {
+ fatal = TRUE;
+ }
+ thread_guard_violation(t, code, subcode, fatal);
}
-#endif
+
/*
- * also works on label handles
+ * Routine: mach_port_guard_ast
+ * Purpose:
+ * Raises an exception for mach port guard violation.
+ * Conditions:
+ * None.
+ * Returns:
+ * None.
*/
-#if CONFIG_MACF_MACH
+
+void
+mach_port_guard_ast(thread_t t,
+ mach_exception_data_type_t code, mach_exception_data_type_t subcode)
+{
+ unsigned int reason = EXC_GUARD_DECODE_GUARD_FLAVOR(code);
+ task_t task = t->task;
+ unsigned int behavior = task->task_exc_guard;
+ assert(task == current_task());
+ assert(task != kernel_task);
+
+ switch (reason) {
+ /*
+ * Fatal Mach port guards - always delivered synchronously
+ */
+ case kGUARD_EXC_DESTROY:
+ case kGUARD_EXC_MOD_REFS:
+ case kGUARD_EXC_SET_CONTEXT:
+ case kGUARD_EXC_UNGUARDED:
+ case kGUARD_EXC_INCORRECT_GUARD:
+ case kGUARD_EXC_IMMOVABLE:
+ case kGUARD_EXC_STRICT_REPLY:
+ task_exception_notify(EXC_GUARD, code, subcode);
+ task_bsdtask_kill(task);
+ break;
+
+ default:
+ /*
+ * Mach port guards controlled by task settings.
+ */
+
+ /* Is delivery enabled */
+ if ((behavior & TASK_EXC_GUARD_MP_DELIVER) == 0) {
+ return;
+ }
+
+ /* If only once, make sure we're that once */
+ while (behavior & TASK_EXC_GUARD_MP_ONCE) {
+ uint32_t new_behavior = behavior & ~TASK_EXC_GUARD_MP_DELIVER;
+
+ if (OSCompareAndSwap(behavior, new_behavior, &task->task_exc_guard)) {
+ break;
+ }
+ behavior = task->task_exc_guard;
+ if ((behavior & TASK_EXC_GUARD_MP_DELIVER) == 0) {
+ return;
+ }
+ }
+
+ /* Raise exception via corpse fork or synchronously */
+ if ((task->task_exc_guard & TASK_EXC_GUARD_MP_CORPSE) &&
+ (task->task_exc_guard & TASK_EXC_GUARD_MP_FATAL) == 0) {
+ task_violated_guard(code, subcode, NULL);
+ } else {
+ task_exception_notify(EXC_GUARD, code, subcode);
+ }
+
+ /* Terminate the task if desired */
+ if (task->task_exc_guard & TASK_EXC_GUARD_MP_FATAL) {
+ task_bsdtask_kill(task);
+ }
+ break;
+ }
+}
+
+/*
+ * Routine: mach_port_construct [kernel call]
+ * Purpose:
+ * Constructs a mach port with the provided set of options.
+ * Conditions:
+ * None.
+ * Returns:
+ * KERN_SUCCESS The right is allocated.
+ * KERN_INVALID_TASK The space is null.
+ * KERN_INVALID_TASK The space is dead.
+ * KERN_RESOURCE_SHORTAGE Couldn't allocate memory.
+ * KERN_NO_SPACE No room in space for another right.
+ * KERN_FAILURE Illegal option values requested.
+ */
+
kern_return_t
-mach_get_label_text(
- ipc_space_t space,
- mach_port_name_t name,
- labelstr_t policies,
- labelstr_t outlabel)
+mach_port_construct(
+ ipc_space_t space,
+ mach_port_options_t *options,
+ uint64_t context,
+ mach_port_name_t *name)
{
- ipc_entry_t entry;
- ipc_port_t port;
- kern_return_t kr;
- struct label *l;
- int dead;
+ kern_return_t kr;
+ ipc_port_t port;
- if (space == IS_NULL || space->is_task == NULL)
+ if (space == IS_NULL) {
return KERN_INVALID_TASK;
+ }
- if (!MACH_PORT_VALID(name))
- return KERN_INVALID_NAME;
-
- kr = ipc_right_lookup_write(space, name, &entry);
- if (kr != KERN_SUCCESS)
+ /* Allocate a new port in the IPC space */
+ kr = ipc_port_alloc(space, (options->flags & MPO_INSERT_SEND_RIGHT),
+ name, &port);
+ if (kr != KERN_SUCCESS) {
return kr;
+ }
- port = (ipc_port_t)entry->ie_object;
- dead = ipc_right_check(space, port, name, entry);
- if (dead) {
- is_write_unlock(space);
- ip_release(port);
- return KERN_INVALID_RIGHT;
+ /* Port locked and active */
+ if (options->flags & MPO_CONTEXT_AS_GUARD) {
+ uint64_t flags = 0;
+ if (options->flags & MPO_STRICT) {
+ flags |= MPG_STRICT;
+ }
+ if (options->flags & MPO_IMMOVABLE_RECEIVE) {
+ flags |= MPG_IMMOVABLE_RECEIVE;
+ }
+ kr = mach_port_guard_locked(port, (uint64_t) context, flags);
+ /* A newly allocated and locked port should always be guarded successfully */
+ assert(kr == KERN_SUCCESS);
+ } else {
+ port->ip_context = context;
}
- /* object (port) is now locked */
- is_write_unlock (space);
- l = io_getlabel(entry->ie_object);
+ /* Unlock port */
+ ip_unlock(port);
- mac_port_label_externalize(l, policies, outlabel, 512, 0);
+ /* Set port attributes as requested */
+
+ if (options->flags & MPO_QLIMIT) {
+ kr = mach_port_set_attributes(space, *name, MACH_PORT_LIMITS_INFO,
+ (mach_port_info_t)&options->mpl, sizeof(options->mpl) / sizeof(int));
+ if (kr != KERN_SUCCESS) {
+ goto cleanup;
+ }
+ }
+
+ if (options->flags & MPO_TEMPOWNER) {
+ kr = mach_port_set_attributes(space, *name, MACH_PORT_TEMPOWNER, NULL, 0);
+ if (kr != KERN_SUCCESS) {
+ goto cleanup;
+ }
+ }
+
+ if (options->flags & MPO_IMPORTANCE_RECEIVER) {
+ kr = mach_port_set_attributes(space, *name, MACH_PORT_IMPORTANCE_RECEIVER, NULL, 0);
+ if (kr != KERN_SUCCESS) {
+ goto cleanup;
+ }
+ }
+
+ if (options->flags & MPO_DENAP_RECEIVER) {
+ kr = mach_port_set_attributes(space, *name, MACH_PORT_DENAP_RECEIVER, NULL, 0);
+ if (kr != KERN_SUCCESS) {
+ goto cleanup;
+ }
+ }
- io_unlocklabel(entry->ie_object);
- io_unlock(entry->ie_object);
return KERN_SUCCESS;
+
+cleanup:
+ /* Attempt to destroy port. If its already destroyed by some other thread, we're done */
+ (void) mach_port_destruct(space, *name,
+ (options->flags & MPO_INSERT_SEND_RIGHT) ? -1 : 0, context);
+ return kr;
}
-#else
+
+/*
+ * Routine: mach_port_destruct [kernel call]
+ * Purpose:
+ * Destroys a mach port with appropriate guard
+ * Conditions:
+ * None.
+ * Returns:
+ * KERN_SUCCESS The name is destroyed.
+ * KERN_INVALID_TASK The space is null.
+ * KERN_INVALID_TASK The space is dead.
+ * KERN_INVALID_NAME The name doesn't denote a right.
+ * KERN_INVALID_RIGHT The right isn't correct.
+ * KERN_INVALID_VALUE The delta for send right is incorrect.
+ * KERN_INVALID_ARGUMENT Port is either unguarded already or guard mismatch.
+ * This also raises a EXC_GUARD exception.
+ */
+
kern_return_t
-mach_get_label_text(
- __unused ipc_space_t space,
- __unused mach_port_name_t name,
- __unused labelstr_t policies,
- __unused labelstr_t outlabel)
+mach_port_destruct(
+ ipc_space_t space,
+ mach_port_name_t name,
+ mach_port_delta_t srdelta,
+ uint64_t guard)
{
- return KERN_INVALID_ARGUMENT;
-}
-#endif
+ kern_return_t kr;
+ ipc_entry_t entry;
+
+ if (space == IS_NULL) {
+ return KERN_INVALID_TASK;
+ }
+ if (!MACH_PORT_VALID(name)) {
+ return KERN_INVALID_NAME;
+ }
-#if CONFIG_MACF_MACH
+ /* Remove reference for receive right */
+ kr = ipc_right_lookup_write(space, name, &entry);
+ if (kr != KERN_SUCCESS) {
+ mach_port_guard_exception(name, 0, 0, kGUARD_EXC_INVALID_NAME);
+ return kr;
+ }
+ /* space is write-locked and active */
+ kr = ipc_right_destruct(space, name, entry, srdelta, guard); /* unlocks */
+
+ return kr;
+}
+
+/*
+ * Routine: mach_port_guard [kernel call]
+ * Purpose:
+ * Guard a mach port with specified guard value.
+ * The context field of the port is used as the guard.
+ * Conditions:
+ * None.
+ * Returns:
+ * KERN_SUCCESS The name is destroyed.
+ * KERN_INVALID_TASK The space is null.
+ * KERN_INVALID_TASK The space is dead.
+ * KERN_INVALID_NAME The name doesn't denote a right.
+ * KERN_INVALID_RIGHT The right isn't correct.
+ * KERN_INVALID_ARGUMENT Port already contains a context/guard.
+ */
kern_return_t
-mach_set_port_label(
- ipc_space_t space,
- mach_port_name_t name,
- labelstr_t labelstr)
+mach_port_guard(
+ ipc_space_t space,
+ mach_port_name_t name,
+ uint64_t guard,
+ boolean_t strict)
{
- ipc_entry_t entry;
- kern_return_t kr;
- struct label inl;
- ipc_port_t port;
- int rc;
+ kern_return_t kr;
+ ipc_port_t port;
+ uint64_t flags = 0;
- if (space == IS_NULL || space->is_task == NULL)
+ if (space == IS_NULL) {
return KERN_INVALID_TASK;
+ }
- if (!MACH_PORT_VALID(name))
+ if (!MACH_PORT_VALID(name)) {
return KERN_INVALID_NAME;
+ }
- mac_port_label_init(&inl);
- rc = mac_port_label_internalize(&inl, labelstr);
- if (rc)
- return KERN_INVALID_ARGUMENT;
+ /* Guard can be applied only to receive rights */
+ kr = ipc_port_translate_receive(space, name, &port);
+ if (kr != KERN_SUCCESS) {
+ mach_port_guard_exception(name, 0, 0,
+ ((KERN_INVALID_NAME == kr) ?
+ kGUARD_EXC_INVALID_NAME :
+ kGUARD_EXC_INVALID_RIGHT));
+ return kr;
+ }
- kr = ipc_right_lookup_write(space, name, &entry);
- if (kr != KERN_SUCCESS)
+ /* Port locked and active */
+ if (strict) {
+ flags = MPG_STRICT;
+ }
+
+ kr = mach_port_guard_locked(port, guard, flags);
+ ip_unlock(port);
+
+ if (KERN_INVALID_ARGUMENT == kr) {
+ mach_port_guard_exception(name, 0, 0, kGUARD_EXC_INVALID_ARGUMENT);
+ }
+
+ return kr;
+}
+
+/*
+ * Routine: mach_port_unguard [kernel call]
+ * Purpose:
+ * Unguard a mach port with specified guard value.
+ * Conditions:
+ * None.
+ * Returns:
+ * KERN_SUCCESS The name is destroyed.
+ * KERN_INVALID_TASK The space is null.
+ * KERN_INVALID_TASK The space is dead.
+ * KERN_INVALID_NAME The name doesn't denote a right.
+ * KERN_INVALID_RIGHT The right isn't correct.
+ * KERN_INVALID_ARGUMENT Port is either unguarded already or guard mismatch.
+ * This also raises a EXC_GUARD exception.
+ */
+kern_return_t
+mach_port_unguard(
+ ipc_space_t space,
+ mach_port_name_t name,
+ uint64_t guard)
+{
+ kern_return_t kr;
+ ipc_port_t port;
+
+ if (space == IS_NULL) {
+ return KERN_INVALID_TASK;
+ }
+
+ if (!MACH_PORT_VALID(name)) {
+ return KERN_INVALID_NAME;
+ }
+
+ kr = ipc_port_translate_receive(space, name, &port);
+ if (kr != KERN_SUCCESS) {
+ mach_port_guard_exception(name, 0, 0,
+ ((KERN_INVALID_NAME == kr) ?
+ kGUARD_EXC_INVALID_NAME :
+ kGUARD_EXC_INVALID_RIGHT));
return kr;
+ }
- if (io_otype(entMACry->ie_object) != IOT_PORT) {
- is_write_unlock(space);
- return KERN_INVALID_RIGHT;
+ /* Port locked and active */
+ kr = mach_port_unguard_locked(port, name, guard);
+ ip_unlock(port);
+
+ return kr;
+}
+
+/*
+ * Routine: mach_port_guard_with_flags [kernel call]
+ * Purpose:
+ * Guard a mach port with specified guard value and guard flags.
+ * The context field of the port is used as the guard.
+ * Conditions:
+ * Should hold receive right for that port
+ * Returns:
+ * KERN_SUCCESS The name is destroyed.
+ * KERN_INVALID_TASK The space is null.
+ * KERN_INVALID_TASK The space is dead.
+ * KERN_INVALID_NAME The name doesn't denote a right.
+ * KERN_INVALID_RIGHT The right isn't correct.
+ * KERN_INVALID_ARGUMENT Port already contains a context/guard.
+ * KERN_INVALID_CAPABILITY Cannot set MPG_IMMOVABLE_RECEIVE flag for a port with
+ * a movable port-destroyed notification port
+ */
+kern_return_t
+mach_port_guard_with_flags(
+ ipc_space_t space,
+ mach_port_name_t name,
+ uint64_t guard,
+ uint64_t flags)
+{
+ kern_return_t kr;
+ ipc_port_t port;
+
+ if (space == IS_NULL) {
+ return KERN_INVALID_TASK;
}
- port = (ipc_port_t) entry->ie_object;
- ip_lock(port);
+ if (!MACH_PORT_VALID(name)) {
+ return KERN_INVALID_NAME;
+ }
- tasklabel_lock(space->is_task);
- rc = mac_port_check_label_update(&space->is_task->maclabel,
- &port->ip_label, &inl);
- tasklabel_unlock(space->is_task);
- if (rc)
- kr = KERN_NO_ACCESS;
- else
- mac_port_label_copy(&inl, &port->ip_label);
+ kr = ipc_port_translate_receive(space, name, &port);
+ if (kr != KERN_SUCCESS) {
+ mach_port_guard_exception(name, 0, 0,
+ ((KERN_INVALID_NAME == kr) ?
+ kGUARD_EXC_INVALID_NAME :
+ kGUARD_EXC_INVALID_RIGHT));
+ return kr;
+ }
+ /* Port locked and active */
+ kr = mach_port_guard_locked(port, guard, flags);
ip_unlock(port);
- is_write_unlock(space);
+
+ if (KERN_INVALID_ARGUMENT == kr) {
+ mach_port_guard_exception(name, 0, 0, kGUARD_EXC_INVALID_ARGUMENT);
+ }
+
return kr;
}
-#else
+
+/*
+ * Routine: mach_port_swap_guard [kernel call]
+ * Purpose:
+ * Swap guard value.
+ * Conditions:
+ * Port should already be guarded.
+ * Returns:
+ * KERN_SUCCESS The name is destroyed.
+ * KERN_INVALID_TASK The space is null.
+ * KERN_INVALID_TASK The space is dead.
+ * KERN_INVALID_NAME The name doesn't denote a right.
+ * KERN_INVALID_RIGHT The right isn't correct.
+ * KERN_INVALID_ARGUMENT Port doesn't contain a guard; is strictly guarded
+ * or the old_guard doesnt match the context
+ */
kern_return_t
-mach_set_port_label(
- ipc_space_t space __unused,
- mach_port_name_t name __unused,
- labelstr_t labelstr __unused)
+mach_port_swap_guard(
+ ipc_space_t space,
+ mach_port_name_t name,
+ uint64_t old_guard,
+ uint64_t new_guard)
{
- return KERN_INVALID_ARGUMENT;
+ kern_return_t kr;
+ ipc_port_t port;
+
+ if (space == IS_NULL) {
+ return KERN_INVALID_TASK;
+ }
+
+ if (!MACH_PORT_VALID(name)) {
+ return KERN_INVALID_NAME;
+ }
+
+ kr = ipc_port_translate_receive(space, name, &port);
+ if (kr != KERN_SUCCESS) {
+ mach_port_guard_exception(name, 0, 0,
+ ((KERN_INVALID_NAME == kr) ?
+ kGUARD_EXC_INVALID_NAME :
+ kGUARD_EXC_INVALID_RIGHT));
+ return kr;
+ }
+
+ /* Port locked and active */
+ if (!port->ip_guarded) {
+ ip_unlock(port);
+ mach_port_guard_exception(name, old_guard, 0, kGUARD_EXC_UNGUARDED);
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ if (port->ip_strict_guard) {
+ uint64_t portguard = port->ip_context;
+ ip_unlock(port);
+ /* For strictly guarded ports, disallow overwriting context; Raise Exception */
+ mach_port_guard_exception(name, old_guard, portguard, kGUARD_EXC_SET_CONTEXT);
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ if (port->ip_context != old_guard) {
+ uint64_t portguard = port->ip_context;
+ ip_unlock(port);
+ mach_port_guard_exception(name, old_guard, portguard, kGUARD_EXC_INCORRECT_GUARD);
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ imq_lock(&port->ip_messages);
+ port->ip_context = new_guard;
+ imq_unlock(&port->ip_messages);
+
+ ip_unlock(port);
+
+ return KERN_SUCCESS;
}
-#endif
projects / apple / xnu.git / blobdiff