* Routine: mach_port_names_helper
* Purpose:
* A helper function for mach_port_names.
+ *
+ * Conditions:
+ * Space containing entry is [at least] read-locked.
*/
void
{
ipc_entry_bits_t bits;
ipc_port_request_index_t request;
- mach_port_type_t type;
+ mach_port_type_t type = 0;
ipc_entry_num_t actual;
+ ipc_port_t port;
bits = entry->ie_bits;
request = entry->ie_request;
- if (bits & MACH_PORT_TYPE_SEND_RIGHTS) {
- ipc_port_t port;
- boolean_t died;
+ port = (ipc_port_t) entry->ie_object;
- port = (ipc_port_t) entry->ie_object;
- assert(port != IP_NULL);
+ if (bits & MACH_PORT_TYPE_RECEIVE) {
+ assert(IP_VALID(port));
- /*
- * The timestamp serializes mach_port_names
- * with ipc_port_destroy. If the port died,
- * but after mach_port_names started, pretend
- * that it isn't dead.
- */
+ if (request != IE_REQ_NONE) {
+ ip_lock(port);
+ assert(ip_active(port));
+ type |= ipc_port_request_type(port, name, request);
+ ip_unlock(port);
+ }
- ip_lock(port);
- died = (!ip_active(port) &&
- IP_TIMESTAMP_ORDER(port->ip_timestamp, timestamp));
- ip_unlock(port);
+ } else if (bits & MACH_PORT_TYPE_SEND_RIGHTS) {
+ mach_port_type_t reqtype;
- if (died) {
- /* pretend this is a dead-name entry */
+ assert(IP_VALID(port));
+ ip_lock(port);
+ reqtype = (request != IE_REQ_NONE) ?
+ 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
+ * a dead name entry.
+ */
+ if (ip_active(port) || IP_TIMESTAMP_ORDER(timestamp, port->ip_timestamp)) {
+ type |= reqtype;
+ } else {
bits &= ~(IE_BITS_TYPE_MASK);
bits |= MACH_PORT_TYPE_DEAD_NAME;
- if (request != 0)
+ /* account for additional reference for dead-name notification */
+ if (reqtype != 0)
bits++;
- request = 0;
}
+ ip_unlock(port);
}
- type = IE_BITS_TYPE(bits);
- if (request != 0)
- type |= MACH_PORT_TYPE_DNREQUEST;
+ type |= IE_BITS_TYPE(bits);
actual = *actualp;
names[actual] = name;
kr = ipc_right_info(space, name, entry, typep, &urefs);
if (kr == KERN_SUCCESS)
is_write_unlock(space);
+#if 1
+ /* JMM - workaround rdar://problem/9121297 (CF being too picky on these bits). */
+ *typep &= ~(MACH_PORT_TYPE_SPREQUEST | MACH_PORT_TYPE_SPREQUEST_DELAYED);
+#endif
+
/* space is unlocked */
return kr;
}
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_alloc(size);
+
+ kmsg = (ipc_kmsg_t)ipc_kmsg_prealloc(size);
if (kmsg == IKM_NULL)
return (KERN_RESOURCE_SHORTAGE);
}
return KERN_SUCCESS;
}
+/*
+ * Routine: mach_port_get_context [kernel call]
+ * Purpose:
+ * Returns a receive right's context pointer.
+ * Conditions:
+ * Nothing locked.
+ * Returns:
+ * KERN_SUCCESS Set context pointer.
+ * 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 Name doesn't denote receive rights.
+ */
+
+kern_return_t
+mach_port_get_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)
+ return KERN_INVALID_TASK;
+
+ 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 */
+ *context = port->ip_context;
+
+ ip_unlock(port);
+ return KERN_SUCCESS;
+}
+
+
+/*
+ * Routine: mach_port_set_context [kernel call]
+ * Purpose:
+ * Changes a receive right's context pointer.
+ * Conditions:
+ * Nothing locked.
+ * Returns:
+ * KERN_SUCCESS Set context pointer.
+ * 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 Name doesn't denote receive rights.
+ */
+
+kern_return_t
+mach_port_set_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)
+ return KERN_INVALID_TASK;
+
+ 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 */
+ port->ip_context = context;
+
+ ip_unlock(port);
+ return KERN_SUCCESS;
+}
+
+
/*
* Routine: mach_port_gst_helper
* Purpose:
/* the port set must be active */
names = (mach_port_name_t *) addr;
- maxnames = size / sizeof(mach_port_name_t);
+ maxnames = (ipc_entry_num_t)(size / sizeof(mach_port_name_t));
actual = 0;
table = space->is_table;
break;
}
+ case MACH_NOTIFY_SEND_POSSIBLE:
+
+ 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)
+ return kr;
+ break;
+
case MACH_NOTIFY_DEAD_NAME:
if (!MACH_PORT_VALID(name)) {
return KERN_INVALID_ARGUMENT;
}
- kr = ipc_right_dnrequest(space, name, sync != 0,
- notify, previousp);
+ kr = ipc_right_request_alloc(space, name, sync != 0,
+ FALSE, notify, previousp);
if (kr != KERN_SUCCESS)
return kr;
break;
return kr;
/* port is locked and active */
- table = port->ip_dnrequests;
+ table = port->ip_requests;
if (table == IPR_NULL)
*(int *)info = 0;
else
return kr;
/* port is locked and active */
- kr = ipc_port_dngrow(port, *(int *)info);
+ kr = ipc_port_request_grow(port, *(int *)info);
if (kr != KERN_SUCCESS)
return kr;
break;
kern_return_t kr;
is_write_lock(space);
+
+ if (!space->is_active) {
+ is_write_unlock(space);
+ return KERN_INVALID_TASK;
+ }
+
kr = ipc_entry_grow_table(space, table_entries);
if (kr == KERN_SUCCESS)
is_write_unlock(space);
projects / apple / xnu.git / blobdiff