void
ipc_port_init(
ipc_port_t port,
ipc_space_t space,
mach_port_name_t name)
{
/* port->ip_kobject doesn't have to be initialized */
port->ip_receiver = space;
port->ip_receiver_name = name;
port->ip_mscount = 0;
port->ip_srights = 0;
port->ip_sorights = 0;
port->ip_nsrequest = IP_NULL;
port->ip_pdrequest = IP_NULL;
port->ip_dnrequests = IPR_NULL;
port->ip_pset_count = 0;
port->ip_premsg = IKM_NULL;
port->ip_context = 0;
#if MACH_ASSERT
ipc_port_init_debug(port);
#endif /* MACH_ASSERT */
ipc_mqueue_init(&port->ip_messages, FALSE /* set */);
}
void
ipc_port_init(
ipc_port_t port,
ipc_space_t space,
mach_port_name_t name)
{
/* port->ip_kobject doesn't have to be initialized */
port->ip_receiver = space;
port->ip_receiver_name = name;
port->ip_mscount = 0;
port->ip_srights = 0;
port->ip_sorights = 0;
port->ip_nsrequest = IP_NULL;
port->ip_pdrequest = IP_NULL;
port->ip_dnrequests = IPR_NULL;
port->ip_pset = IPS_NULL;
port->ip_seqno = 0;
port->ip_msgcount = 0;
port->ip_qlimit = MACH_PORT_QLIMIT_DEFAULT;
port->ip_subsystem = RPC_SUBSYSTEM_NULL;
port->ip_flags = 0;
port->ip_context = 0;
/*
* Turn no more senders detection on
* for all ports. Eventually, this
* default will go away, and nms
* detection will be enabled depending
* on how the port is allocated. XXX
*/
IP_SET_NMS(port);
#if MACH_ASSERT
ipc_port_init_debug(port);
#endif /* MACH_ASSERT */
ipc_mqueue_init(&port->ip_messages);
thread_pool_init(&port->ip_thread_pool);
ipc_thread_queue_init(&port->ip_blocked);
}
kern_return_t
ipc_port_alloc(
ipc_space_t space,
mach_port_name_t *namep,
ipc_port_t *portp)
{
ipc_port_t port;
mach_port_name_t name;
kern_return_t kr;
#if MACH_ASSERT
uintptr_t buf[IP_CALLSTACK_MAX];
ipc_port_callstack_init_debug(&buf[0], IP_CALLSTACK_MAX);
#endif /* MACH_ASSERT */
kr = ipc_object_alloc(space, IOT_PORT,
MACH_PORT_TYPE_RECEIVE, 0,
&name, (ipc_object_t *) &port);
if (kr != KERN_SUCCESS)
return kr;
/* port and space are locked */
ipc_port_init(port, space, name);
#if MACH_ASSERT
ipc_port_init_debug(port, &buf[0], IP_CALLSTACK_MAX);
#endif /* MACH_ASSERT */
/* unlock space after init */
is_write_unlock(space);
#if CONFIG_MACF_MACH
task_t issuer = current_task();
tasklabel_lock2 (issuer, space->is_task);
mac_port_label_associate(&issuer->maclabel, &space->is_task->maclabel,
&port->ip_label);
tasklabel_unlock2 (issuer, space->is_task);
#endif
*namep = name;
*portp = port;
return KERN_SUCCESS;
}
ipc_port_t
ipc_port_alloc_special(
ipc_space_t space)
{
ipc_port_t port;
port = (ipc_port_t) io_alloc(IOT_PORT);
if (port == IP_NULL)
return IP_NULL;
#if MACH_ASSERT
uintptr_t buf[IP_CALLSTACK_MAX];
ipc_port_callstack_init_debug(&buf[0], IP_CALLSTACK_MAX);
#endif /* MACH_ASSERT */
bzero((char *)port, sizeof(*port));
io_lock_init(&port->ip_object);
port->ip_references = 1;
port->ip_object.io_bits = io_makebits(TRUE, IOT_PORT, 0);
ipc_port_init(port, space, 1);
#if MACH_ASSERT
ipc_port_init_debug(port, &buf[0], IP_CALLSTACK_MAX);
#endif /* MACH_ASSERT */
#if CONFIG_MACF_MACH
/* Currently, ipc_port_alloc_special is used for two things:
* - Reply ports for messages from the kernel
* - Ports for communication with the kernel (e.g. task ports)
* Since both of these would typically be labelled as kernel objects,
* we will use a new entry point for this purpose, as current_task()
* is often wrong (i.e. not kernel_task) or null.
*/
mac_port_label_init(&port->ip_label);
mac_port_label_associate_kernel(&port->ip_label, space == ipc_space_reply);
#endif
return port;
}
