* Operations on kernel messages.
*/
-#include <norma_vm.h>
#include <mach/mach_types.h>
#include <mach/boolean.h>
#include <kern/processor.h>
#include <kern/thread.h>
#include <kern/sched_prim.h>
-#include <kern/spl.h>
#include <kern/misc_protos.h>
#include <kern/counters.h>
#include <kern/cpu_data.h>
+#include <kern/policy_internal.h>
#include <machine/machlimits.h>
#include <ipc/ipc_right.h>
#include <ipc/ipc_hash.h>
#include <ipc/ipc_table.h>
+#include <ipc/ipc_importance.h>
+#if MACH_FLIPC
+#include <kern/mach_node.h>
+#include <ipc/flipc.h>
+#endif
+
+#include <os/overflow.h>
#include <security/mac_mach_internal.h>
+#include <device/device_server.h>
+
#include <string.h>
#ifdef ppc
#define DEBUG_MSGS_K64 1
#endif
+#include <sys/kdebug.h>
+#include <libkern/OSAtomic.h>
+
#pragma pack(4)
typedef struct
{
mach_msg_bits_t msgh_bits;
mach_msg_size_t msgh_size;
- uint32_t msgh_remote_port;
- uint32_t msgh_local_port;
- mach_msg_size_t msgh_reserved;
+ mach_port_name_t msgh_remote_port;
+ mach_port_name_t msgh_local_port;
+ mach_port_name_t msgh_voucher_port;
mach_msg_id_t msgh_id;
} mach_msg_legacy_header_t;
#pragma pack()
#define LEGACY_HEADER_SIZE_DELTA ((mach_msg_size_t)(sizeof(mach_msg_header_t) - sizeof(mach_msg_legacy_header_t)))
+
// END LP64 fixes
name = "VIRTUAL";
break;
case MACH_MSG_OVERWRITE:
- name = "OVERWRITE";
+ name = "OVERWRITE(DEPRECATED)";
break;
case MACH_MSG_ALLOCATE:
name = "ALLOCATE";
}
#define DEBUG_IPC_KMSG_PRINT(kmsg,string) \
+ __unreachable_ok_push \
if (DEBUG_KPRINT_SYSCALL_PREDICATE(DEBUG_KPRINT_SYSCALL_IPC_MASK)) { \
ipc_kmsg_print64(kmsg, string); \
- }
+ } \
+ __unreachable_ok_pop
+
#define DEBUG_IPC_MSG_BODY_PRINT(body,size) \
+ __unreachable_ok_push \
if (DEBUG_KPRINT_SYSCALL_PREDICATE(DEBUG_KPRINT_SYSCALL_IPC_MASK)) { \
ipc_msg_body_print64(body,size);\
- }
+ } \
+ __unreachable_ok_pop
#else /* !DEBUG_MSGS_K64 */
#define DEBUG_IPC_KMSG_PRINT(kmsg,string)
#define DEBUG_IPC_MSG_BODY_PRINT(body,size)
#endif /* !DEBUG_MSGS_K64 */
extern vm_map_t ipc_kernel_copy_map;
+extern vm_size_t ipc_kmsg_max_space;
extern vm_size_t ipc_kmsg_max_vm_space;
+extern vm_size_t ipc_kmsg_max_body_space;
extern vm_size_t msg_ool_size_small;
#define MSG_OOL_SIZE_SMALL msg_ool_size_small
} \
MACRO_END
+#define KMSG_TRACE_FLAG_TRACED 0x000001
+#define KMSG_TRACE_FLAG_COMPLEX 0x000002
+#define KMSG_TRACE_FLAG_OOLMEM 0x000004
+#define KMSG_TRACE_FLAG_VCPY 0x000008
+#define KMSG_TRACE_FLAG_PCPY 0x000010
+#define KMSG_TRACE_FLAG_SND64 0x000020
+#define KMSG_TRACE_FLAG_RAISEIMP 0x000040
+#define KMSG_TRACE_FLAG_APP_SRC 0x000080
+#define KMSG_TRACE_FLAG_APP_DST 0x000100
+#define KMSG_TRACE_FLAG_DAEMON_SRC 0x000200
+#define KMSG_TRACE_FLAG_DAEMON_DST 0x000400
+#define KMSG_TRACE_FLAG_DST_NDFLTQ 0x000800
+#define KMSG_TRACE_FLAG_SRC_NDFLTQ 0x001000
+#define KMSG_TRACE_FLAG_DST_SONCE 0x002000
+#define KMSG_TRACE_FLAG_SRC_SONCE 0x004000
+#define KMSG_TRACE_FLAG_CHECKIN 0x008000
+#define KMSG_TRACE_FLAG_ONEWAY 0x010000
+#define KMSG_TRACE_FLAG_IOKIT 0x020000
+#define KMSG_TRACE_FLAG_SNDRCV 0x040000
+#define KMSG_TRACE_FLAG_DSTQFULL 0x080000
+#define KMSG_TRACE_FLAG_VOUCHER 0x100000
+#define KMSG_TRACE_FLAG_TIMER 0x200000
+#define KMSG_TRACE_FLAG_SEMA 0x400000
+#define KMSG_TRACE_FLAG_DTMPOWNER 0x800000
+
+#define KMSG_TRACE_FLAGS_MASK 0xffffff
+#define KMSG_TRACE_FLAGS_SHIFT 8
+
+#define KMSG_TRACE_PORTS_MASK 0xff
+#define KMSG_TRACE_PORTS_SHIFT 0
+
+#if (KDEBUG_LEVEL >= KDEBUG_LEVEL_STANDARD)
+#include <stdint.h>
+extern boolean_t kdebug_debugid_enabled(uint32_t debugid);
+
+void ipc_kmsg_trace_send(ipc_kmsg_t kmsg,
+ mach_msg_option_t option)
+{
+ task_t send_task = TASK_NULL;
+ ipc_port_t dst_port, src_port;
+ boolean_t is_task_64bit;
+ mach_msg_header_t *msg;
+ mach_msg_trailer_t *trailer;
+
+ int kotype = 0;
+ uint32_t msg_size = 0;
+ uint32_t msg_flags = KMSG_TRACE_FLAG_TRACED;
+ uint32_t num_ports = 0;
+ uint32_t send_pid, dst_pid;
+
+ /*
+ * check to see not only if ktracing is enabled, but if we will
+ * _actually_ emit the KMSG_INFO tracepoint. This saves us a
+ * significant amount of processing (and a port lock hold) in
+ * the non-tracing case.
+ */
+ if (__probable((kdebug_enable & KDEBUG_TRACE) == 0))
+ return;
+ if (!kdebug_debugid_enabled(MACHDBG_CODE(DBG_MACH_IPC,MACH_IPC_KMSG_INFO)))
+ return;
+
+ msg = kmsg->ikm_header;
+
+ dst_port = (ipc_port_t)(msg->msgh_remote_port);
+ if (!IPC_PORT_VALID(dst_port))
+ return;
+
+ /*
+ * Message properties / options
+ */
+ if ((option & (MACH_SEND_MSG|MACH_RCV_MSG)) == (MACH_SEND_MSG|MACH_RCV_MSG))
+ msg_flags |= KMSG_TRACE_FLAG_SNDRCV;
+
+ if (msg->msgh_id >= is_iokit_subsystem.start &&
+ msg->msgh_id < is_iokit_subsystem.end + 100)
+ msg_flags |= KMSG_TRACE_FLAG_IOKIT;
+ /* magic XPC checkin message id (XPC_MESSAGE_ID_CHECKIN) from libxpc */
+ else if (msg->msgh_id == 0x77303074u /* w00t */)
+ msg_flags |= KMSG_TRACE_FLAG_CHECKIN;
+
+ if (msg->msgh_bits & MACH_MSGH_BITS_RAISEIMP)
+ msg_flags |= KMSG_TRACE_FLAG_RAISEIMP;
+
+ if (unsafe_convert_port_to_voucher(kmsg->ikm_voucher))
+ msg_flags |= KMSG_TRACE_FLAG_VOUCHER;
+
+ /*
+ * Sending task / port
+ */
+ send_task = current_task();
+ send_pid = task_pid(send_task);
+
+ if (send_pid != 0) {
+ if (task_is_daemon(send_task))
+ msg_flags |= KMSG_TRACE_FLAG_DAEMON_SRC;
+ else if (task_is_app(send_task))
+ msg_flags |= KMSG_TRACE_FLAG_APP_SRC;
+ }
+
+ is_task_64bit = (send_task->map->max_offset > VM_MAX_ADDRESS);
+ if (is_task_64bit)
+ msg_flags |= KMSG_TRACE_FLAG_SND64;
+
+ src_port = (ipc_port_t)(msg->msgh_local_port);
+ if (src_port) {
+ if (src_port->ip_messages.imq_qlimit != MACH_PORT_QLIMIT_DEFAULT)
+ msg_flags |= KMSG_TRACE_FLAG_SRC_NDFLTQ;
+ switch (MACH_MSGH_BITS_LOCAL(msg->msgh_bits)) {
+ case MACH_MSG_TYPE_MOVE_SEND_ONCE:
+ msg_flags |= KMSG_TRACE_FLAG_SRC_SONCE;
+ break;
+ default:
+ break;
+ }
+ } else {
+ msg_flags |= KMSG_TRACE_FLAG_ONEWAY;
+ }
+
+
+ /*
+ * Destination task / port
+ */
+ ip_lock(dst_port);
+ if (!ip_active(dst_port)) {
+ /* dst port is being torn down */
+ dst_pid = (uint32_t)0xfffffff0;
+ } else if (dst_port->ip_tempowner) {
+ msg_flags |= KMSG_TRACE_FLAG_DTMPOWNER;
+ if (IIT_NULL != dst_port->ip_imp_task)
+ dst_pid = task_pid(dst_port->ip_imp_task->iit_task);
+ else
+ dst_pid = (uint32_t)0xfffffff1;
+ } else if (dst_port->ip_receiver_name == MACH_PORT_NULL) {
+ /* dst_port is otherwise in-transit */
+ dst_pid = (uint32_t)0xfffffff2;
+ } else {
+ if (dst_port->ip_receiver == ipc_space_kernel) {
+ dst_pid = 0;
+ } else {
+ ipc_space_t dst_space;
+ dst_space = dst_port->ip_receiver;
+ if (dst_space && is_active(dst_space)) {
+ dst_pid = task_pid(dst_space->is_task);
+ if (task_is_daemon(dst_space->is_task))
+ msg_flags |= KMSG_TRACE_FLAG_DAEMON_DST;
+ else if (task_is_app(dst_space->is_task))
+ msg_flags |= KMSG_TRACE_FLAG_APP_DST;
+ } else {
+ /* receiving task is being torn down */
+ dst_pid = (uint32_t)0xfffffff3;
+ }
+ }
+ }
+
+ if (dst_port->ip_messages.imq_qlimit != MACH_PORT_QLIMIT_DEFAULT)
+ msg_flags |= KMSG_TRACE_FLAG_DST_NDFLTQ;
+ if (imq_full(&dst_port->ip_messages))
+ msg_flags |= KMSG_TRACE_FLAG_DSTQFULL;
+
+ kotype = ip_kotype(dst_port);
+
+ ip_unlock(dst_port);
+
+ switch (kotype) {
+ case IKOT_SEMAPHORE:
+ msg_flags |= KMSG_TRACE_FLAG_SEMA;
+ break;
+ case IKOT_TIMER:
+ case IKOT_CLOCK:
+ msg_flags |= KMSG_TRACE_FLAG_TIMER;
+ break;
+ case IKOT_MASTER_DEVICE:
+ case IKOT_IOKIT_CONNECT:
+ case IKOT_IOKIT_OBJECT:
+ case IKOT_IOKIT_IDENT:
+ msg_flags |= KMSG_TRACE_FLAG_IOKIT;
+ break;
+ default:
+ break;
+ }
+
+ switch(MACH_MSGH_BITS_REMOTE(msg->msgh_bits)) {
+ case MACH_MSG_TYPE_PORT_SEND_ONCE:
+ msg_flags |= KMSG_TRACE_FLAG_DST_SONCE;
+ break;
+ default:
+ break;
+ }
+
+
+ /*
+ * Message size / content
+ */
+ msg_size = msg->msgh_size - sizeof(mach_msg_header_t);
+
+ if (msg->msgh_bits & MACH_MSGH_BITS_COMPLEX) {
+ mach_msg_body_t *msg_body;
+ mach_msg_descriptor_t *kern_dsc;
+ int dsc_count;
+
+ msg_flags |= KMSG_TRACE_FLAG_COMPLEX;
+
+ msg_body = (mach_msg_body_t *)(kmsg->ikm_header + 1);
+ dsc_count = (int)msg_body->msgh_descriptor_count;
+ kern_dsc = (mach_msg_descriptor_t *)(msg_body + 1);
+
+ /* this is gross: see ipc_kmsg_copyin_body()... */
+ if (!is_task_64bit)
+ msg_size -= (dsc_count * 12);
+
+ for (int i = 0; i < dsc_count; i++) {
+ switch (kern_dsc[i].type.type) {
+ case MACH_MSG_PORT_DESCRIPTOR:
+ num_ports++;
+ if (is_task_64bit)
+ msg_size -= 12;
+ break;
+ case MACH_MSG_OOL_VOLATILE_DESCRIPTOR:
+ case MACH_MSG_OOL_DESCRIPTOR: {
+ mach_msg_ool_descriptor_t *dsc;
+ dsc = (mach_msg_ool_descriptor_t *)&kern_dsc[i];
+ msg_flags |= KMSG_TRACE_FLAG_OOLMEM;
+ msg_size += dsc->size;
+ if ((dsc->size >= MSG_OOL_SIZE_SMALL) &&
+ (dsc->copy == MACH_MSG_PHYSICAL_COPY) &&
+ !dsc->deallocate)
+ msg_flags |= KMSG_TRACE_FLAG_PCPY;
+ else if (dsc->size <= MSG_OOL_SIZE_SMALL)
+ msg_flags |= KMSG_TRACE_FLAG_PCPY;
+ else
+ msg_flags |= KMSG_TRACE_FLAG_VCPY;
+ if (is_task_64bit)
+ msg_size -= 16;
+ } break;
+ case MACH_MSG_OOL_PORTS_DESCRIPTOR: {
+ mach_msg_ool_ports_descriptor_t *dsc;
+ dsc = (mach_msg_ool_ports_descriptor_t *)&kern_dsc[i];
+ num_ports += dsc->count;
+ if (is_task_64bit)
+ msg_size -= 16;
+ } break;
+ default:
+ break;
+ }
+ }
+ }
+
+ /*
+ * Trailer contents
+ */
+ trailer = (mach_msg_trailer_t *)((vm_offset_t)msg +
+ (vm_offset_t)msg->msgh_size);
+ if (trailer->msgh_trailer_size <= sizeof(mach_msg_security_trailer_t)) {
+ extern security_token_t KERNEL_SECURITY_TOKEN;
+ mach_msg_security_trailer_t *strailer;
+ strailer = (mach_msg_security_trailer_t *)trailer;
+ /*
+ * verify the sender PID: replies from the kernel often look
+ * like self-talk because the sending port is not reset.
+ */
+ if (memcmp(&strailer->msgh_sender,
+ &KERNEL_SECURITY_TOKEN,
+ sizeof(KERNEL_SECURITY_TOKEN)) == 0) {
+ send_pid = 0;
+ msg_flags &= ~(KMSG_TRACE_FLAG_APP_SRC | KMSG_TRACE_FLAG_DAEMON_SRC);
+ }
+ }
+
+ KDBG(MACHDBG_CODE(DBG_MACH_IPC,MACH_IPC_KMSG_INFO) | DBG_FUNC_END,
+ (uintptr_t)send_pid,
+ (uintptr_t)dst_pid,
+ (uintptr_t)msg_size,
+ (uintptr_t)(
+ ((msg_flags & KMSG_TRACE_FLAGS_MASK) << KMSG_TRACE_FLAGS_SHIFT) |
+ ((num_ports & KMSG_TRACE_PORTS_MASK) << KMSG_TRACE_PORTS_SHIFT)
+ )
+ );
+}
+#endif
+
/* zone for cached ipc_kmsg_t structures */
zone_t ipc_kmsg_zone;
ipc_space_t space,
vm_map_t map);
+extern int thread_qos_from_pthread_priority(unsigned long, unsigned long *);
+
/*
* We keep a per-processor cache of kernel message buffers.
* The cache saves the overhead/locking of using kalloc/kfree.
* data backwards.
*/
mach_msg_size_t size = msg_and_trailer_size - MAX_TRAILER_SIZE;
+
+ /* compare against implementation upper limit for the body */
+ if (size > ipc_kmsg_max_body_space)
+ return IKM_NULL;
+
if (size > sizeof(mach_msg_base_t)) {
mach_msg_size_t max_desc = (mach_msg_size_t)(((size - sizeof(mach_msg_base_t)) /
sizeof(mach_msg_ool_descriptor32_t)) *
DESC_SIZE_ADJUSTMENT);
+
+ /* make sure expansion won't cause wrap */
if (msg_and_trailer_size > MACH_MSG_SIZE_MAX - max_desc)
return IKM_NULL;
max_expanded_size = msg_and_trailer_size + max_desc;
} else
- max_expanded_size = msg_and_trailer_size;
+ max_expanded_size = msg_and_trailer_size;
- if (max_expanded_size > ikm_less_overhead(MACH_MSG_SIZE_MAX))
- return IKM_NULL;
- else if (max_expanded_size < IKM_SAVED_MSG_SIZE)
+ if (max_expanded_size < IKM_SAVED_MSG_SIZE)
max_expanded_size = IKM_SAVED_MSG_SIZE; /* round up for ikm_cache */
if (max_expanded_size == IKM_SAVED_MSG_SIZE) {
mach_msg_size_t size = kmsg->ikm_size;
ipc_port_t port;
-#if CONFIG_MACF_MACH
- if (kmsg->ikm_sender != NULL) {
- task_deallocate(kmsg->ikm_sender);
- kmsg->ikm_sender = NULL;
- }
-#endif
+ assert(!IP_VALID(kmsg->ikm_voucher));
+
+ KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_IPC,MACH_IPC_KMSG_FREE) | DBG_FUNC_NONE,
+ VM_KERNEL_ADDRPERM((uintptr_t)kmsg),
+ 0, 0, 0, 0);
/*
* Check to see if the message is bound to the port. If so,
if (ip_active(port) && (port->ip_premsg == kmsg)) {
assert(IP_PREALLOC(port));
ip_unlock(port);
+ ip_release(port);
return;
}
- ip_check_unlock(port); /* May be last reference */
+ ip_unlock(port);
+ ip_release(port); /* May be last reference */
}
/*
ipc_kmsg_queue_t queue,
ipc_kmsg_t kmsg)
{
- ipc_kmsg_enqueue_macro(queue, kmsg);
+ ipc_kmsg_t first = queue->ikmq_base;
+ ipc_kmsg_t last;
+
+ if (first == IKM_NULL) {
+ queue->ikmq_base = kmsg;
+ kmsg->ikm_next = kmsg;
+ kmsg->ikm_prev = kmsg;
+ } else {
+ last = first->ikm_prev;
+ kmsg->ikm_next = first;
+ kmsg->ikm_prev = last;
+ first->ikm_prev = kmsg;
+ last->ikm_next = kmsg;
+ }
+}
+
+/*
+ * Routine: ipc_kmsg_enqueue_qos
+ * Purpose:
+ * Enqueue a kmsg, propagating qos
+ * overrides towards the head of the queue.
+ *
+ * Returns:
+ * whether the head of the queue had
+ * it's override-qos adjusted because
+ * of this insertion.
+ */
+
+boolean_t
+ipc_kmsg_enqueue_qos(
+ ipc_kmsg_queue_t queue,
+ ipc_kmsg_t kmsg)
+{
+ ipc_kmsg_t first = queue->ikmq_base;
+ ipc_kmsg_t prev;
+ mach_msg_priority_t override;
+
+ if (first == IKM_NULL) {
+ /* insert a first message */
+ queue->ikmq_base = kmsg;
+ kmsg->ikm_next = kmsg;
+ kmsg->ikm_prev = kmsg;
+ return TRUE;
+ }
+
+ /* insert at the tail */
+ prev = first->ikm_prev;
+ kmsg->ikm_next = first;
+ kmsg->ikm_prev = prev;
+ first->ikm_prev = kmsg;
+ prev->ikm_next = kmsg;
+
+ /* apply QoS overrides towards the head */
+ override = kmsg->ikm_qos_override;
+ while (prev != kmsg &&
+ override > prev->ikm_qos_override) {
+ prev->ikm_qos_override = override;
+ prev = prev->ikm_prev;
+ }
+
+ /* did we adjust everything? */
+ return (prev == kmsg);
+}
+
+/*
+ * Routine: ipc_kmsg_override_qos
+ * Purpose:
+ * Update the override for a given kmsg already
+ * enqueued, propagating qos override adjustments
+ * towards the head of the queue.
+ *
+ * Returns:
+ * whether the head of the queue had
+ * it's override-qos adjusted because
+ * of this insertion.
+ */
+
+boolean_t
+ipc_kmsg_override_qos(
+ ipc_kmsg_queue_t queue,
+ ipc_kmsg_t kmsg,
+ mach_msg_priority_t override)
+{
+ ipc_kmsg_t first = queue->ikmq_base;
+ ipc_kmsg_t cur = kmsg;
+
+ /* apply QoS overrides towards the head */
+ while (override > cur->ikm_qos_override) {
+ cur->ikm_qos_override = override;
+ if (cur == first)
+ return TRUE;
+ cur = cur->ikm_prev;
+ }
+ return FALSE;
}
/*
first = ipc_kmsg_queue_first(queue);
if (first != IKM_NULL)
- ipc_kmsg_rmqueue_first_macro(queue, first);
+ ipc_kmsg_rmqueue(queue, first);
return first;
}
queue->ikmq_base = IKM_NULL;
} else {
+ if (__improbable(next->ikm_prev != kmsg || prev->ikm_next != kmsg)) {
+ panic("ipc_kmsg_rmqueue: inconsistent prev/next pointers. "
+ "(prev->next: %p, next->prev: %p, kmsg: %p)",
+ prev->ikm_next, next->ikm_prev, kmsg);
+ }
+
if (queue->ikmq_base == kmsg)
queue->ikmq_base = next;
ipc_object_t object;
mach_msg_bits_t mbits = kmsg->ikm_header->msgh_bits;
+ /* deal with importance chain while we still have dest and voucher references */
+ ipc_importance_clean(kmsg);
+
object = (ipc_object_t) kmsg->ikm_header->msgh_remote_port;
assert(IO_VALID(object));
ipc_object_destroy_dest(object, MACH_MSGH_BITS_REMOTE(mbits));
if (IO_VALID(object))
ipc_object_destroy(object, MACH_MSGH_BITS_LOCAL(mbits));
+ object = (ipc_object_t) kmsg->ikm_voucher;
+ if (IO_VALID(object)) {
+ assert(MACH_MSGH_BITS_VOUCHER(mbits) == MACH_MSG_TYPE_MOVE_SEND);
+ ipc_object_destroy(object, MACH_MSG_TYPE_PORT_SEND);
+ kmsg->ikm_voucher = IP_NULL;
+ }
+
if (paddr) {
(void) vm_deallocate(ipc_kernel_copy_map, paddr, length);
}
ipc_object_t object;
mach_msg_bits_t mbits;
+ /* deal with importance chain while we still have dest and voucher references */
+ ipc_importance_clean(kmsg);
+
mbits = kmsg->ikm_header->msgh_bits;
object = (ipc_object_t) kmsg->ikm_header->msgh_remote_port;
if (IO_VALID(object))
if (IO_VALID(object))
ipc_object_destroy(object, MACH_MSGH_BITS_LOCAL(mbits));
+ object = (ipc_object_t) kmsg->ikm_voucher;
+ if (IO_VALID(object)) {
+ assert(MACH_MSGH_BITS_VOUCHER(mbits) == MACH_MSG_TYPE_MOVE_SEND);
+ ipc_object_destroy(object, MACH_MSG_TYPE_PORT_SEND);
+ kmsg->ikm_voucher = IP_NULL;
+ }
+
if (mbits & MACH_MSGH_BITS_COMPLEX) {
mach_msg_body_t *body;
ipc_kmsg_clean_body(kmsg, body->msgh_descriptor_count,
(mach_msg_descriptor_t *)(body + 1));
}
-
-#if CONFIG_MACF_MACH
- if (kmsg->ikm_sender != NULL) {
- task_deallocate(kmsg->ikm_sender);
- kmsg->ikm_sender = NULL;
- }
-#endif
}
/*
assert(kmsg->ikm_prealloc == IP_NULL);
kmsg->ikm_prealloc = IP_NULL;
+ /* take the mqueue lock since the sync qos is protected under it */
+ imq_lock(&port->ip_messages);
+
+ /* copy the sync qos values to kmsg */
+ for (int i = 0; i < THREAD_QOS_LAST; i++) {
+ kmsg->sync_qos[i] = port_sync_qos(port, i);
+ }
+ kmsg->special_port_qos = port_special_qos(port);
IP_SET_PREALLOC(port, kmsg);
+ imq_unlock(&port->ip_messages);
}
/*
assert(kmsg->ikm_prealloc == port);
kmsg->ikm_prealloc = IP_NULL;
+
+ /* take the mqueue lock since the sync qos is protected under it */
+ imq_lock(&port->ip_messages);
+
IP_CLEAR_PREALLOC(port, kmsg);
+
+ /* copy the sync qos values from kmsg to port */
+ for (int i = 0; i < THREAD_QOS_LAST; i++) {
+ set_port_sync_qos(port, i, kmsg->sync_qos[i]);
+ }
+ set_port_special_qos(port, kmsg->special_port_qos);
+ imq_unlock(&port->ip_messages);
}
/*
* MACH_MSG_SUCCESS Acquired a message buffer.
* MACH_SEND_MSG_TOO_SMALL Message smaller than a header.
* MACH_SEND_MSG_TOO_SMALL Message size not long-word multiple.
+ * MACH_SEND_TOO_LARGE Message too large to ever be sent.
* MACH_SEND_NO_BUFFER Couldn't allocate a message buffer.
* MACH_SEND_INVALID_DATA Couldn't copy message data.
*/
if ((size < sizeof(mach_msg_legacy_header_t)) || (size & 3))
return MACH_SEND_MSG_TOO_SMALL;
- if (size > MACH_MSG_SIZE_MAX - MAX_TRAILER_SIZE)
+ if (size > ipc_kmsg_max_body_space)
return MACH_SEND_TOO_LARGE;
if(size == sizeof(mach_msg_legacy_header_t))
if (copyinmsg(msg_addr, (char *)&legacy_base, len_copied))
return MACH_SEND_INVALID_DATA;
+ /*
+ * If the message claims to be complex, it must at least
+ * have the length of a "base" message (header + dsc_count).
+ */
+ if (len_copied < sizeof(mach_msg_legacy_base_t) &&
+ (legacy_base.header.msgh_bits & MACH_MSGH_BITS_COMPLEX))
+ return MACH_SEND_MSG_TOO_SMALL;
+
msg_addr += sizeof(legacy_base.header);
#if defined(__LP64__)
size += LEGACY_HEADER_SIZE_DELTA;
#endif
+ /* unreachable if !DEBUG */
+ __unreachable_ok_push
if (DEBUG_KPRINT_SYSCALL_PREDICATE(DEBUG_KPRINT_SYSCALL_IPC_MASK)) {
unsigned int j;
for (j=0; j<sizeof(legacy_base.header); j++) {
kprintf("%02x\n", ((unsigned char*)&legacy_base.header)[j]);
}
}
+ __unreachable_ok_pop
msg_and_trailer_size = size + MAX_TRAILER_SIZE;
kmsg = ipc_kmsg_alloc(msg_and_trailer_size);
kmsg->ikm_header->msgh_bits = legacy_base.header.msgh_bits;
kmsg->ikm_header->msgh_remote_port = CAST_MACH_NAME_TO_PORT(legacy_base.header.msgh_remote_port);
kmsg->ikm_header->msgh_local_port = CAST_MACH_NAME_TO_PORT(legacy_base.header.msgh_local_port);
- kmsg->ikm_header->msgh_reserved = legacy_base.header.msgh_reserved;
+ kmsg->ikm_header->msgh_voucher_port = legacy_base.header.msgh_voucher_port;
kmsg->ikm_header->msgh_id = legacy_base.header.msgh_id;
DEBUG_KPRINT_SYSCALL_IPC("ipc_kmsg_get header:\n"
" bits: 0x%.8x\n"
" remote_port: %p\n"
" local_port: %p\n"
- " reserved: 0x%.8x\n"
+ " voucher_port: 0x%.8x\n"
" id: %.8d\n",
kmsg->ikm_header->msgh_size,
kmsg->ikm_header->msgh_bits,
kmsg->ikm_header->msgh_remote_port,
kmsg->ikm_header->msgh_local_port,
- kmsg->ikm_header->msgh_reserved,
+ kmsg->ikm_header->msgh_voucher_port,
kmsg->ikm_header->msgh_id);
if (copyinmsg(msg_addr, (char *)(kmsg->ikm_header + 1), size - (mach_msg_size_t)sizeof(mach_msg_header_t))) {
return MACH_SEND_INVALID_DATA;
}
+ /* unreachable if !DEBUG */
+ __unreachable_ok_push
if (DEBUG_KPRINT_SYSCALL_PREDICATE(DEBUG_KPRINT_SYSCALL_IPC_MASK))
{
kprintf("body: size: %lu\n", (size - sizeof(mach_msg_header_t)));
kprintf("%.4x\n",((uint32_t *)(kmsg->ikm_header + 1))[i]);
}
}
+ __unreachable_ok_pop
DEBUG_IPC_KMSG_PRINT(kmsg, "ipc_kmsg_get()");
/*
(unsigned int)kmsg->ikm_header->msgh_local_port, 0);
#endif
-#if CONFIG_MACF_MACH
- /* XXX - why do we zero sender labels here instead of in mach_msg()? */
- task_t cur = current_task();
- if (cur) {
- task_reference(cur);
- kmsg->ikm_sender = cur;
- } else
- trailer->msgh_labels.sender = 0;
-#else
trailer->msgh_labels.sender = 0;
-#endif
-
*kmsgp = kmsg;
return MACH_MSG_SUCCESS;
}
ipc_port_t dest_port;
assert(size >= sizeof(mach_msg_header_t));
-// assert((size & 3) == 0);
+ assert((size & 3) == 0);
dest_port = (ipc_port_t)msg->msgh_remote_port;
(void) memcpy((void *) kmsg->ikm_header, (const void *) msg, size);
+ ikm_qos_init(kmsg);
+
kmsg->ikm_header->msgh_size = size;
/*
trailer->msgh_labels.sender = 0;
-#if CONFIG_MACF_MACH
- kmsg->ikm_sender = NULL;
-#endif
*kmsgp = kmsg;
return MACH_MSG_SUCCESS;
}
* MACH_SEND_INTERRUPTED Caller still has message.
* MACH_SEND_INVALID_DEST Caller still has message.
*/
+
+
mach_msg_return_t
ipc_kmsg_send(
ipc_kmsg_t kmsg,
mach_msg_timeout_t send_timeout)
{
ipc_port_t port;
+ thread_t th = current_thread();
mach_msg_return_t error = MACH_MSG_SUCCESS;
- spl_t s;
+ boolean_t kernel_reply = FALSE;
+
+ /* Check if honor qlimit flag is set on thread. */
+ if ((th->options & TH_OPT_HONOR_QLIMIT) == TH_OPT_HONOR_QLIMIT) {
+ /* Remove the MACH_SEND_ALWAYS flag to honor queue limit. */
+ option &= (~MACH_SEND_ALWAYS);
+ /* Add the timeout flag since the message queue might be full. */
+ option |= MACH_SEND_TIMEOUT;
+ th->options &= (~TH_OPT_HONOR_QLIMIT);
+ }
+
+#if IMPORTANCE_INHERITANCE
+ boolean_t did_importance = FALSE;
+#if IMPORTANCE_TRACE
+ mach_msg_id_t imp_msgh_id = -1;
+ int sender_pid = -1;
+#endif /* IMPORTANCE_TRACE */
+#endif /* IMPORTANCE_INHERITANCE */
+
+ /* don't allow the creation of a circular loop */
+ if (kmsg->ikm_header->msgh_bits & MACH_MSGH_BITS_CIRCULAR) {
+ ipc_kmsg_destroy(kmsg);
+ KDBG(MACHDBG_CODE(DBG_MACH_IPC,MACH_IPC_KMSG_INFO) | DBG_FUNC_END, MACH_MSGH_BITS_CIRCULAR);
+ return MACH_MSG_SUCCESS;
+ }
+
+ ipc_voucher_send_preprocessing(kmsg);
port = (ipc_port_t) kmsg->ikm_header->msgh_remote_port;
assert(IP_VALID(port));
-
ip_lock(port);
+#if IMPORTANCE_INHERITANCE
+retry:
+#endif /* IMPORTANCE_INHERITANCE */
+ /*
+ * Can't deliver to a dead port.
+ * However, we can pretend it got sent
+ * and was then immediately destroyed.
+ */
+ if (!ip_active(port)) {
+ ip_unlock(port);
+#if MACH_FLIPC
+ if (MACH_NODE_VALID(kmsg->ikm_node) && FPORT_VALID(port->ip_messages.imq_fport))
+ flipc_msg_ack(kmsg->ikm_node, &port->ip_messages, FALSE);
+#endif
+ ip_release(port); /* JMM - Future: release right, not just ref */
+ kmsg->ikm_header->msgh_remote_port = MACH_PORT_NULL;
+ ipc_kmsg_destroy(kmsg);
+ KDBG(MACHDBG_CODE(DBG_MACH_IPC,MACH_IPC_KMSG_INFO) | DBG_FUNC_END, MACH_SEND_INVALID_DEST);
+ return MACH_MSG_SUCCESS;
+ }
+
if (port->ip_receiver == ipc_space_kernel) {
/*
/*
* Call the server routine, and get the reply message to send.
*/
- kmsg = ipc_kobject_server(kmsg);
+ kmsg = ipc_kobject_server(kmsg, option);
if (kmsg == IKM_NULL)
return MACH_MSG_SUCCESS;
+ /* restart the KMSG_INFO tracing for the reply message */
+ KDBG(MACHDBG_CODE(DBG_MACH_IPC,MACH_IPC_KMSG_INFO) | DBG_FUNC_START);
port = (ipc_port_t) kmsg->ikm_header->msgh_remote_port;
assert(IP_VALID(port));
ip_lock(port);
/* fall thru with reply - same options */
+ kernel_reply = TRUE;
+ if (!ip_active(port))
+ error = MACH_SEND_INVALID_DEST;
}
+#if IMPORTANCE_INHERITANCE
/*
- * Can't deliver to a dead port.
- * However, we can pretend it got sent
- * and was then immediately destroyed.
+ * Need to see if this message needs importance donation and/or
+ * propagation. That routine can drop the port lock temporarily.
+ * If it does we'll have to revalidate the destination.
*/
- if (!ip_active(port)) {
+ if (did_importance == FALSE) {
+ did_importance = TRUE;
+ if (ipc_importance_send(kmsg, option))
+ goto retry;
+ }
+#endif /* IMPORTANCE_INHERITANCE */
+
+ if (error != MACH_MSG_SUCCESS) {
+ ip_unlock(port);
+ } else {
/*
- * We can't let ipc_kmsg_destroy deallocate
- * the port right, because we might end up
- * in an infinite loop trying to deliver
- * a send-once notification.
+ * We have a valid message and a valid reference on the port.
+ * we can unlock the port and call mqueue_send() on its message
+ * queue. Lock message queue while port is locked.
*/
+ imq_lock(&port->ip_messages);
+ ip_unlock(port);
- ip_release(port);
- ip_check_unlock(port);
- kmsg->ikm_header->msgh_remote_port = MACH_PORT_NULL;
- ipc_kmsg_destroy(kmsg);
- return MACH_MSG_SUCCESS;
+ error = ipc_mqueue_send(&port->ip_messages, kmsg, option,
+ send_timeout);
}
- if (kmsg->ikm_header->msgh_bits & MACH_MSGH_BITS_CIRCULAR) {
- ip_unlock(port);
-
- /* don't allow the creation of a circular loop */
+#if IMPORTANCE_INHERITANCE
+ if (did_importance == TRUE) {
+ __unused int importance_cleared = 0;
+ switch (error) {
+ case MACH_SEND_TIMED_OUT:
+ case MACH_SEND_NO_BUFFER:
+ case MACH_SEND_INTERRUPTED:
+ case MACH_SEND_INVALID_DEST:
+ /*
+ * We still have the kmsg and its
+ * reference on the port. But we
+ * have to back out the importance
+ * boost.
+ *
+ * The port could have changed hands,
+ * be inflight to another destination,
+ * etc... But in those cases our
+ * back-out will find the new owner
+ * (and all the operations that
+ * transferred the right should have
+ * applied their own boost adjustments
+ * to the old owner(s)).
+ */
+ importance_cleared = 1;
+ ipc_importance_clean(kmsg);
+ break;
- ipc_kmsg_destroy(kmsg);
- return MACH_MSG_SUCCESS;
+ case MACH_MSG_SUCCESS:
+ default:
+ break;
+ }
+#if IMPORTANCE_TRACE
+ KERNEL_DEBUG_CONSTANT_IST(KDEBUG_TRACE, (IMPORTANCE_CODE(IMP_MSG, IMP_MSG_SEND)) | DBG_FUNC_END,
+ task_pid(current_task()), sender_pid, imp_msgh_id, importance_cleared, 0);
+#endif /* IMPORTANCE_TRACE */
}
-
- /*
- * We have a valid message and a valid reference on the port.
- * we can unlock the port and call mqueue_send() on its message
- * queue. Lock message queue while port is locked.
- */
- s = splsched();
- imq_lock(&port->ip_messages);
- ip_unlock(port);
- error = ipc_mqueue_send(&port->ip_messages, kmsg, option,
- send_timeout, s);
+#endif /* IMPORTANCE_INHERITANCE */
/*
* If the port has been destroyed while we wait, treat the message
* as a successful delivery (like we do for an inactive port).
*/
if (error == MACH_SEND_INVALID_DEST) {
+#if MACH_FLIPC
+ if (MACH_NODE_VALID(kmsg->ikm_node) && FPORT_VALID(port->ip_messages.imq_fport))
+ flipc_msg_ack(kmsg->ikm_node, &port->ip_messages, FALSE);
+#endif
+ ip_release(port); /* JMM - Future: release right, not just ref */
+ kmsg->ikm_header->msgh_remote_port = MACH_PORT_NULL;
+ ipc_kmsg_destroy(kmsg);
+ KDBG(MACHDBG_CODE(DBG_MACH_IPC,MACH_IPC_KMSG_INFO) | DBG_FUNC_END, MACH_SEND_INVALID_DEST);
+ return MACH_MSG_SUCCESS;
+ }
+
+ if (error != MACH_MSG_SUCCESS && kernel_reply) {
+ /*
+ * Kernel reply messages that fail can't be allowed to
+ * pseudo-receive on error conditions. We need to just treat
+ * the message as a successful delivery.
+ */
+#if MACH_FLIPC
+ if (MACH_NODE_VALID(kmsg->ikm_node) && FPORT_VALID(port->ip_messages.imq_fport))
+ flipc_msg_ack(kmsg->ikm_node, &port->ip_messages, FALSE);
+#endif
+ ip_release(port); /* JMM - Future: release right, not just ref */
kmsg->ikm_header->msgh_remote_port = MACH_PORT_NULL;
ipc_kmsg_destroy(kmsg);
+ KDBG(MACHDBG_CODE(DBG_MACH_IPC,MACH_IPC_KMSG_INFO) | DBG_FUNC_END, error);
return MACH_MSG_SUCCESS;
}
return error;
mach_msg_return_t
ipc_kmsg_put(
- mach_vm_address_t msg_addr,
ipc_kmsg_t kmsg,
- mach_msg_size_t size)
+ mach_msg_option_t option,
+ mach_vm_address_t rcv_addr,
+ mach_msg_size_t rcv_size,
+ mach_msg_size_t trailer_size,
+ mach_msg_size_t *sizep)
{
+ mach_msg_size_t size = kmsg->ikm_header->msgh_size + trailer_size;
mach_msg_return_t mr;
DEBUG_IPC_KMSG_PRINT(kmsg, "ipc_kmsg_put()");
" bits: 0x%.8x\n"
" remote_port: %p\n"
" local_port: %p\n"
- " reserved: 0x%.8x\n"
+ " voucher_port: 0x%.8x\n"
" id: %.8d\n",
kmsg->ikm_header->msgh_size,
kmsg->ikm_header->msgh_bits,
kmsg->ikm_header->msgh_remote_port,
kmsg->ikm_header->msgh_local_port,
- kmsg->ikm_header->msgh_reserved,
+ kmsg->ikm_header->msgh_voucher_port,
kmsg->ikm_header->msgh_id);
#if defined(__LP64__)
mach_msg_size_t msg_size = kmsg->ikm_header->msgh_size;
mach_port_name_t remote_port = CAST_MACH_PORT_TO_NAME(kmsg->ikm_header->msgh_remote_port);
mach_port_name_t local_port = CAST_MACH_PORT_TO_NAME(kmsg->ikm_header->msgh_local_port);
- mach_msg_size_t reserved = kmsg->ikm_header->msgh_reserved;
+ mach_port_name_t voucher_port = kmsg->ikm_header->msgh_voucher_port;
mach_msg_id_t id = kmsg->ikm_header->msgh_id;
legacy_header->msgh_id = id;
- legacy_header->msgh_reserved = reserved;
- legacy_header->msgh_local_port = local_port;
- legacy_header->msgh_remote_port = remote_port;
+ legacy_header->msgh_local_port = local_port;
+ legacy_header->msgh_remote_port = remote_port;
+ legacy_header->msgh_voucher_port = voucher_port;
legacy_header->msgh_size = msg_size - LEGACY_HEADER_SIZE_DELTA;
legacy_header->msgh_bits = bits;
}
#endif
+ /* unreachable if !DEBUG */
+ __unreachable_ok_push
if (DEBUG_KPRINT_SYSCALL_PREDICATE(DEBUG_KPRINT_SYSCALL_IPC_MASK)) {
kprintf("ipc_kmsg_put header+body: %d\n", (size));
uint32_t i;
}
kprintf("type: %d\n", ((mach_msg_type_descriptor_t *)(((mach_msg_base_t *)kmsg->ikm_header)+1))->type);
}
- if (copyoutmsg((const char *) kmsg->ikm_header, msg_addr, size))
+ __unreachable_ok_pop
+
+ /* Re-Compute target address if using stack-style delivery */
+ if (option & MACH_RCV_STACK) {
+ rcv_addr += rcv_size - size;
+ }
+
+ if (copyoutmsg((const char *) kmsg->ikm_header, rcv_addr, size)) {
mr = MACH_RCV_INVALID_DATA;
- else
+ size = 0;
+ } else
mr = MACH_MSG_SUCCESS;
+ KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_IPC,MACH_IPC_KMSG_LINK) | DBG_FUNC_NONE,
+ (rcv_addr >= VM_MIN_KERNEL_AND_KEXT_ADDRESS ||
+ rcv_addr + size >= VM_MIN_KERNEL_AND_KEXT_ADDRESS) ? (uintptr_t)0 : (uintptr_t)rcv_addr,
+ VM_KERNEL_ADDRPERM((uintptr_t)kmsg),
+ 1 /* this is on the receive/copyout path */,
+ 0,
+ 0);
ipc_kmsg_free(kmsg);
+
+ if (sizep)
+ *sizep = size;
return mr;
}
ipc_kmsg_free(kmsg);
}
+unsigned long pthread_priority_canonicalize(unsigned long priority, boolean_t propagation);
+
+static kern_return_t
+ipc_kmsg_set_qos(
+ ipc_kmsg_t kmsg,
+ mach_msg_option_t options,
+ mach_msg_priority_t override)
+{
+ kern_return_t kr;
+ unsigned long flags = 0;
+ ipc_port_t special_reply_port = kmsg->ikm_header->msgh_local_port;
+ ipc_port_t dest_port = kmsg->ikm_header->msgh_remote_port;
+
+ kr = ipc_get_pthpriority_from_kmsg_voucher(kmsg, &kmsg->ikm_qos);
+ if (kr != KERN_SUCCESS) {
+ kmsg->ikm_qos = MACH_MSG_PRIORITY_UNSPECIFIED;
+ }
+ kmsg->ikm_qos_override = kmsg->ikm_qos;
+
+ if (options & MACH_SEND_OVERRIDE) {
+ unsigned long canonical;
+ mach_msg_priority_t canon;
+
+ canonical = pthread_priority_canonicalize(override, TRUE);
+ canon = (mach_msg_priority_t)canonical;
+ if (canon > kmsg->ikm_qos)
+ kmsg->ikm_qos_override = canon;
+ }
+
+ kr = KERN_SUCCESS;
+ if ((options & MACH_SEND_SYNC_OVERRIDE)) {
+ if (IP_VALID(special_reply_port) &&
+ MACH_MSGH_BITS_LOCAL(kmsg->ikm_header->msgh_bits) == MACH_MSG_TYPE_PORT_SEND_ONCE) {
+ /*
+ * Update the sync override count if the reply port is a special reply port,
+ * link the destination port to special reply port and update the qos count
+ * of destination port.
+ *
+ * Use the qos value passed by voucher and not the one passed by notify field.
+ */
+ kr = ipc_port_link_special_reply_port_with_qos(special_reply_port, dest_port,
+ thread_qos_from_pthread_priority(kmsg->ikm_qos, &flags));
+ } else {
+ kr = KERN_FAILURE;
+ }
+ }
+ return kr;
+}
+
/*
* Routine: ipc_kmsg_copyin_header
* Purpose:
mach_msg_return_t
ipc_kmsg_copyin_header(
- mach_msg_header_t *msg,
+ ipc_kmsg_t kmsg,
ipc_space_t space,
- boolean_t notify)
+ mach_msg_priority_t override,
+ mach_msg_option_t *optionp)
{
+ mach_msg_header_t *msg = kmsg->ikm_header;
mach_msg_bits_t mbits = msg->msgh_bits & MACH_MSGH_BITS_USER;
mach_port_name_t dest_name = CAST_MACH_PORT_TO_NAME(msg->msgh_remote_port);
mach_port_name_t reply_name = CAST_MACH_PORT_TO_NAME(msg->msgh_local_port);
+ mach_port_name_t voucher_name = MACH_PORT_NULL;
kern_return_t kr;
mach_msg_type_name_t dest_type = MACH_MSGH_BITS_REMOTE(mbits);
mach_msg_type_name_t reply_type = MACH_MSGH_BITS_LOCAL(mbits);
- ipc_object_t dest_port, reply_port;
- ipc_port_t dest_soright, reply_soright;
- ipc_entry_t dest_entry, reply_entry;
+ mach_msg_type_name_t voucher_type = MACH_MSGH_BITS_VOUCHER(mbits);
+ ipc_object_t dest_port = IO_NULL;
+ ipc_object_t reply_port = IO_NULL;
+ ipc_port_t dest_soright = IP_NULL;
+ ipc_port_t reply_soright = IP_NULL;
+ ipc_port_t voucher_soright = IP_NULL;
+ ipc_port_t release_port = IP_NULL;
+ ipc_port_t voucher_port = IP_NULL;
+ ipc_port_t voucher_release_port = IP_NULL;
+ ipc_entry_t dest_entry = IE_NULL;
+ ipc_entry_t reply_entry = IE_NULL;
+ ipc_entry_t voucher_entry = IE_NULL;
+
+ int assertcnt = 0;
+#if IMPORTANCE_INHERITANCE
+ boolean_t needboost = FALSE;
+#endif /* IMPORTANCE_INHERITANCE */
if ((mbits != msg->msgh_bits) ||
(!MACH_MSG_TYPE_PORT_ANY_SEND(dest_type)) ||
!MACH_MSG_TYPE_PORT_ANY_SEND(reply_type)))
return MACH_SEND_INVALID_HEADER;
- reply_soright = IP_NULL; /* in case we go to invalid dest early */
+ if (!MACH_PORT_VALID(dest_name))
+ return MACH_SEND_INVALID_DEST;
is_write_lock(space);
- if (!space->is_active)
- goto invalid_dest;
-
- if (!MACH_PORT_VALID(dest_name))
- goto invalid_dest;
+ if (!is_active(space)) {
+ is_write_unlock(space);
+ return MACH_SEND_INVALID_DEST;
+ }
+ /* space locked and active */
-#if CONFIG_MACF_MACH
/*
- * We do the port send check here instead of in ipc_kmsg_send()
- * because copying the header involves copying the port rights too
- * and we need to do the send check before anything is actually copied.
+ * If there is a voucher specified, make sure the disposition is
+ * valid and the entry actually refers to a voucher port. Don't
+ * actually copy in until we validate destination and reply.
*/
- dest_entry = ipc_entry_lookup(space, dest_name);
- if (dest_entry != IE_NULL) {
- int error = 0;
- ipc_port_t port = (ipc_port_t) dest_entry->ie_object;
- if (port == IP_NULL)
- goto invalid_dest;
- ip_lock(port);
- if (ip_active(port)) {
- task_t self = current_task();
- tasklabel_lock(self);
- error = mac_port_check_send(&self->maclabel,
- &port->ip_label);
- tasklabel_unlock(self);
- }
- ip_unlock(port);
- if (error != 0)
- goto invalid_dest;
- }
-#endif
-
- if (dest_name == reply_name) {
- mach_port_name_t name = dest_name;
+ if (voucher_type != MACH_MSGH_BITS_ZERO) {
- /*
- * Destination and reply ports are the same!
- * This is a little tedious to make atomic, because
- * there are 25 combinations of dest_type/reply_type.
- * However, most are easy. If either is move-sonce,
- * then there must be an error. If either are
- * make-send or make-sonce, then we must be looking
- * at a receive right so the port can't die.
- * The hard cases are the combinations of
- * copy-send and make-send.
- */
+ voucher_name = msg->msgh_voucher_port;
- dest_entry = ipc_entry_lookup(space, name);
- if (dest_entry == IE_NULL)
- goto invalid_dest;
+ if (voucher_name == MACH_PORT_DEAD ||
+ (voucher_type != MACH_MSG_TYPE_MOVE_SEND &&
+ voucher_type != MACH_MSG_TYPE_COPY_SEND)) {
+ is_write_unlock(space);
+ return MACH_SEND_INVALID_VOUCHER;
+ }
- reply_entry = dest_entry;
- assert(reply_type != 0); /* because name not null */
+ if (voucher_name != MACH_PORT_NULL) {
+ voucher_entry = ipc_entry_lookup(space, voucher_name);
+ if (voucher_entry == IE_NULL ||
+ (voucher_entry->ie_bits & MACH_PORT_TYPE_SEND) == 0 ||
+ io_kotype(voucher_entry->ie_object) != IKOT_VOUCHER) {
+ is_write_unlock(space);
+ return MACH_SEND_INVALID_VOUCHER;
+ }
+ } else {
+ voucher_type = MACH_MSG_TYPE_MOVE_SEND;
+ }
+ }
- if (!ipc_right_copyin_check(space, name, reply_entry, reply_type))
- goto invalid_reply;
+ /*
+ * Handle combinations of validating destination and reply; along
+ * with copying in destination, reply, and voucher in an atomic way.
+ */
- if ((dest_type == MACH_MSG_TYPE_MOVE_SEND_ONCE) ||
- (reply_type == MACH_MSG_TYPE_MOVE_SEND_ONCE)) {
- /*
- * Why must there be an error? To get a valid
- * destination, this entry must name a live
- * port (not a dead name or dead port). However
- * a successful move-sonce will destroy a
- * live entry. Therefore the other copyin,
- * whatever it is, would fail. We've already
- * checked for reply port errors above,
- * so report a destination error.
- */
+ if (dest_name == voucher_name) {
+ /*
+ * If the destination name is the same as the voucher name,
+ * the voucher_entry must already be known. Either that or
+ * the destination name is MACH_PORT_NULL (i.e. invalid).
+ */
+ dest_entry = voucher_entry;
+ if (dest_entry == IE_NULL) {
goto invalid_dest;
- } else if ((dest_type == MACH_MSG_TYPE_MAKE_SEND) ||
- (dest_type == MACH_MSG_TYPE_MAKE_SEND_ONCE) ||
- (reply_type == MACH_MSG_TYPE_MAKE_SEND) ||
- (reply_type == MACH_MSG_TYPE_MAKE_SEND_ONCE)) {
- kr = ipc_right_copyin(space, name, dest_entry,
- dest_type, FALSE,
- &dest_port, &dest_soright);
- if (kr != KERN_SUCCESS)
- goto invalid_dest;
+ }
- /*
- * Either dest or reply needs a receive right.
- * We know the receive right is there, because
- * of the copyin_check and copyin calls. Hence
- * the port is not in danger of dying. If dest
- * used the receive right, then the right needed
- * by reply (and verified by copyin_check) will
- * still be there.
- */
+ /*
+ * Make sure a future copyin of the reply port will succeed.
+ * Once we start copying in the dest/voucher pair, we can't
+ * back out.
+ */
+ if (MACH_PORT_VALID(reply_name)) {
+ assert(reply_type != 0); /* because reply_name not null */
- assert(IO_VALID(dest_port));
- assert(dest_soright == IP_NULL);
+ /* It is just WRONG if dest, voucher, and reply are all the same. */
+ if (voucher_name == reply_name) {
+ goto invalid_reply;
+ }
+ reply_entry = ipc_entry_lookup(space, reply_name);
+ if (reply_entry == IE_NULL) {
+ goto invalid_reply;
+ }
+ assert(dest_entry != reply_entry); /* names are not equal */
+ if (!ipc_right_copyin_check(space, reply_name, reply_entry, reply_type)) {
+ goto invalid_reply;
+ }
+ }
- kr = ipc_right_copyin(space, name, reply_entry,
- reply_type, TRUE,
- &reply_port, &reply_soright);
+ /*
+ * Do the joint copyin of the dest disposition and
+ * voucher disposition from the one entry/port. We
+ * already validated that the voucher copyin would
+ * succeed (above). So, any failure in combining
+ * the copyins can be blamed on the destination.
+ */
+ kr = ipc_right_copyin_two(space, dest_name, dest_entry,
+ dest_type, voucher_type,
+ &dest_port, &dest_soright,
+ &release_port);
+ if (kr != KERN_SUCCESS) {
+ assert(kr != KERN_INVALID_CAPABILITY);
+ goto invalid_dest;
+ }
+ voucher_port = (ipc_port_t)dest_port;
+ /*
+ * could not have been one of these dispositions,
+ * validated the port was a true kernel voucher port above,
+ * AND was successfully able to copyin both dest and voucher.
+ */
+ assert(dest_type != MACH_MSG_TYPE_MAKE_SEND);
+ assert(dest_type != MACH_MSG_TYPE_MAKE_SEND_ONCE);
+ assert(dest_type != MACH_MSG_TYPE_MOVE_SEND_ONCE);
+
+ /*
+ * Perform the delayed reply right copyin (guaranteed success).
+ */
+ if (reply_entry != IE_NULL) {
+ kr = ipc_right_copyin(space, reply_name, reply_entry,
+ reply_type, TRUE,
+ &reply_port, &reply_soright,
+ &release_port, &assertcnt);
+ assert(assertcnt == 0);
assert(kr == KERN_SUCCESS);
- assert(reply_port == dest_port);
- assert(reply_entry->ie_bits & MACH_PORT_TYPE_RECEIVE);
- assert(reply_soright == IP_NULL);
- } else if ((dest_type == MACH_MSG_TYPE_COPY_SEND) &&
- (reply_type == MACH_MSG_TYPE_COPY_SEND)) {
- /*
- * To make this atomic, just do one copy-send,
- * and dup the send right we get out.
- */
-
- kr = ipc_right_copyin(space, name, dest_entry,
- dest_type, FALSE,
- &dest_port, &dest_soright);
- if (kr != KERN_SUCCESS)
- goto invalid_dest;
-
- assert(dest_entry->ie_bits & MACH_PORT_TYPE_SEND);
- assert(dest_soright == IP_NULL);
+ }
+ } else {
+ if (dest_name == reply_name) {
/*
- * It's OK if the port we got is dead now,
- * so reply_port is IP_DEAD, because the msg
- * won't go anywhere anyway.
+ * Destination and reply ports are the same!
+ * This is very similar to the case where the
+ * destination and voucher ports were the same
+ * (except the reply port disposition is not
+ * previously validated).
*/
+ dest_entry = ipc_entry_lookup(space, dest_name);
+ if (dest_entry == IE_NULL) {
+ goto invalid_dest;
+ }
+ reply_entry = dest_entry;
+ assert(reply_type != 0); /* because name not null */
- reply_port = (ipc_object_t)
- ipc_port_copy_send((ipc_port_t) dest_port);
- reply_soright = IP_NULL;
- } else if ((dest_type == MACH_MSG_TYPE_MOVE_SEND) &&
- (reply_type == MACH_MSG_TYPE_MOVE_SEND)) {
- /*
- * This is an easy case. Just use our
- * handy-dandy special-purpose copyin call
- * to get two send rights for the price of one.
+ /*
+ * Do the joint copyin of the dest disposition and
+ * reply disposition from the one entry/port.
*/
-
- kr = ipc_right_copyin_two(space, name, dest_entry,
- &dest_port, &dest_soright);
- if (kr != KERN_SUCCESS)
+ kr = ipc_right_copyin_two(space, dest_name, dest_entry,
+ dest_type, reply_type,
+ &dest_port, &dest_soright,
+ &release_port);
+ if (kr == KERN_INVALID_CAPABILITY) {
+ goto invalid_reply;
+ } else if (kr != KERN_SUCCESS) {
goto invalid_dest;
-
- /* the entry might need to be deallocated */
- if (IE_BITS_TYPE(dest_entry->ie_bits) == MACH_PORT_TYPE_NONE) {
- ipc_entry_dealloc(space, name, dest_entry);
- dest_entry = IE_NULL;
}
-
reply_port = dest_port;
- reply_soright = IP_NULL;
- } else {
- ipc_port_t soright;
- assert(((dest_type == MACH_MSG_TYPE_COPY_SEND) &&
- (reply_type == MACH_MSG_TYPE_MOVE_SEND)) ||
- ((dest_type == MACH_MSG_TYPE_MOVE_SEND) &&
- (reply_type == MACH_MSG_TYPE_COPY_SEND)));
+ } else {
/*
- * To make this atomic, just do a move-send,
- * and dup the send right we get out.
+ * Handle destination and reply independently, as
+ * they are independent entries (even if the entries
+ * refer to the same port).
+ *
+ * This can be the tough case to make atomic.
+ *
+ * The difficult problem is serializing with port death.
+ * The bad case is when dest_port dies after its copyin,
+ * reply_port dies before its copyin, and dest_port dies before
+ * reply_port. Then the copyins operated as if dest_port was
+ * alive and reply_port was dead, which shouldn't have happened
+ * because they died in the other order.
+ *
+ * Note that it is easy for a user task to tell if
+ * a copyin happened before or after a port died.
+ * If a port dies before copyin, a dead-name notification
+ * is generated and the dead name's urefs are incremented,
+ * and if the copyin happens first, a port-deleted
+ * notification is generated.
+ *
+ * Even so, avoiding that potentially detectable race is too
+ * expensive - and no known code cares about it. So, we just
+ * do the expedient thing and copy them in one after the other.
*/
- kr = ipc_right_copyin(space, name, dest_entry,
- MACH_MSG_TYPE_MOVE_SEND, FALSE,
- &dest_port, &soright);
- if (kr != KERN_SUCCESS)
+ dest_entry = ipc_entry_lookup(space, dest_name);
+ if (dest_entry == IE_NULL) {
goto invalid_dest;
+ }
+ assert(dest_entry != voucher_entry);
- /* the entry might need to be deallocated */
+ /*
+ * Make sure reply port entry is valid before dest copyin.
+ */
+ if (MACH_PORT_VALID(reply_name)) {
+ if (reply_name == voucher_name) {
+ goto invalid_reply;
+ }
+ reply_entry = ipc_entry_lookup(space, reply_name);
+ if (reply_entry == IE_NULL) {
+ goto invalid_reply;
+ }
+ assert(dest_entry != reply_entry); /* names are not equal */
+ assert(reply_type != 0); /* because reply_name not null */
- if (IE_BITS_TYPE(dest_entry->ie_bits) == MACH_PORT_TYPE_NONE) {
- ipc_entry_dealloc(space, name, dest_entry);
- dest_entry = IE_NULL;
+ if (!ipc_right_copyin_check(space, reply_name, reply_entry, reply_type)) {
+ goto invalid_reply;
+ }
}
/*
- * It's OK if the port we got is dead now,
- * so reply_port is IP_DEAD, because the msg
- * won't go anywhere anyway.
+ * copyin the destination.
*/
+ kr = ipc_right_copyin(space, dest_name, dest_entry,
+ dest_type, FALSE,
+ &dest_port, &dest_soright,
+ &release_port, &assertcnt);
+ assert(assertcnt == 0);
+ if (kr != KERN_SUCCESS) {
+ goto invalid_dest;
+ }
+ assert(IO_VALID(dest_port));
+ assert(!IP_VALID(release_port));
- reply_port = (ipc_object_t)
- ipc_port_copy_send((ipc_port_t) dest_port);
-
- if (dest_type == MACH_MSG_TYPE_MOVE_SEND) {
- dest_soright = soright;
- reply_soright = IP_NULL;
+ /*
+ * Copyin the pre-validated reply right.
+ * It's OK if the reply right has gone dead in the meantime.
+ */
+ if (MACH_PORT_VALID(reply_name)) {
+ kr = ipc_right_copyin(space, reply_name, reply_entry,
+ reply_type, TRUE,
+ &reply_port, &reply_soright,
+ &release_port, &assertcnt);
+ assert(assertcnt == 0);
+ assert(kr == KERN_SUCCESS);
} else {
- dest_soright = IP_NULL;
- reply_soright = soright;
+ /* convert invalid name to equivalent ipc_object type */
+ reply_port = (ipc_object_t)CAST_MACH_NAME_TO_PORT(reply_name);
}
}
- } else if (!MACH_PORT_VALID(reply_name)) {
- /*
- * No reply port! This is an easy case
- * to make atomic. Just copyin the destination.
- */
-
- dest_entry = ipc_entry_lookup(space, dest_name);
- if (dest_entry == IE_NULL)
- goto invalid_dest;
-
- kr = ipc_right_copyin(space, dest_name, dest_entry,
- dest_type, FALSE,
- &dest_port, &dest_soright);
- if (kr != KERN_SUCCESS)
- goto invalid_dest;
-
- /* the entry might need to be deallocated */
- if (IE_BITS_TYPE(dest_entry->ie_bits) == MACH_PORT_TYPE_NONE) {
- ipc_entry_dealloc(space, dest_name, dest_entry);
- dest_entry = IE_NULL;
- }
- reply_port = (ipc_object_t)CAST_MACH_NAME_TO_PORT(reply_name);
- reply_soright = IP_NULL;
- } else {
/*
- * This is the tough case to make atomic.
- * The difficult problem is serializing with port death.
- * At the time we copyin dest_port, it must be alive.
- * If reply_port is alive when we copyin it, then
- * we are OK, because we serialize before the death
- * of both ports. Assume reply_port is dead at copyin.
- * Then if dest_port dies/died after reply_port died,
- * we are OK, because we serialize between the death
- * of the two ports. So the bad case is when dest_port
- * dies after its copyin, reply_port dies before its
- * copyin, and dest_port dies before reply_port. Then
- * the copyins operated as if dest_port was alive
- * and reply_port was dead, which shouldn't have happened
- * because they died in the other order.
- *
- * Note that it is easy for a user task to tell if
- * a copyin happened before or after a port died.
- * For example, suppose both dest and reply are
- * send-once rights (types are both move-sonce) and
- * both rights have dead-name requests registered.
- * If a port dies before copyin, a dead-name notification
- * is generated and the dead name's urefs are incremented,
- * and if the copyin happens first, a port-deleted
- * notification is generated.
- *
- * Note that although the entries are different,
- * dest_port and reply_port might still be the same.
- *
- * JMM - The code to handle this was too expensive and, anyway,
- * we intend to separate the dest lookup from the reply copyin
- * by a wide margin, so the user will have to learn to deal!
- * I will be making the change soon in rdar://problem/6275821.
+ * Finally can copyin the voucher right now that dest and reply
+ * are fully copied in (guaranteed success).
*/
+ if (IE_NULL != voucher_entry) {
+ kr = ipc_right_copyin(space, voucher_name, voucher_entry,
+ voucher_type, FALSE,
+ (ipc_object_t *)&voucher_port,
+ &voucher_soright,
+ &voucher_release_port,
+ &assertcnt);
+ assert(assertcnt == 0);
+ assert(KERN_SUCCESS == kr);
+ assert(IP_VALID(voucher_port));
+ assert(ip_active(voucher_port));
+ }
+ }
- dest_entry = ipc_entry_lookup(space, dest_name);
- if (dest_entry == IE_NULL)
- goto invalid_dest;
-
- reply_entry = ipc_entry_lookup(space, reply_name);
- if (reply_entry == IE_NULL)
- goto invalid_reply;
-
- assert(dest_entry != reply_entry); /* names are not equal */
- assert(reply_type != 0); /* because reply_name not null */
-
- if (!ipc_right_copyin_check(space, reply_name, reply_entry,
- reply_type))
- goto invalid_reply;
-
- kr = ipc_right_copyin(space, dest_name, dest_entry,
- dest_type, FALSE,
- &dest_port, &dest_soright);
- if (kr != KERN_SUCCESS)
- goto invalid_dest;
-
- assert(IO_VALID(dest_port));
-
- kr = ipc_right_copyin(space, reply_name, reply_entry,
- reply_type, TRUE,
- &reply_port, &reply_soright);
-
- assert(kr == KERN_SUCCESS);
+ /*
+ * The entries might need to be deallocated.
+ *
+ * Each entry should be deallocated only once,
+ * even if it was specified in more than one slot in the header.
+ * Note that dest can be the same entry as reply or voucher,
+ * but reply and voucher must be distinct entries.
+ */
+ assert(IE_NULL != dest_entry);
+ if (IE_NULL != reply_entry)
+ assert(reply_entry != voucher_entry);
- /* the entries might need to be deallocated */
+ if (IE_BITS_TYPE(dest_entry->ie_bits) == MACH_PORT_TYPE_NONE) {
+ ipc_entry_dealloc(space, dest_name, dest_entry);
- if (IE_BITS_TYPE(reply_entry->ie_bits) == MACH_PORT_TYPE_NONE) {
- ipc_entry_dealloc(space, reply_name, reply_entry);
+ if (dest_entry == reply_entry) {
reply_entry = IE_NULL;
}
- if (IE_BITS_TYPE(dest_entry->ie_bits) == MACH_PORT_TYPE_NONE) {
- ipc_entry_dealloc(space, dest_name, dest_entry);
- dest_entry = IE_NULL;
+ if (dest_entry == voucher_entry) {
+ voucher_entry = IE_NULL;
}
+
+ dest_entry = IE_NULL;
+ }
+ if (IE_NULL != reply_entry &&
+ IE_BITS_TYPE(reply_entry->ie_bits) == MACH_PORT_TYPE_NONE) {
+ ipc_entry_dealloc(space, reply_name, reply_entry);
+ reply_entry = IE_NULL;
+ }
+ if (IE_NULL != voucher_entry &&
+ IE_BITS_TYPE(voucher_entry->ie_bits) == MACH_PORT_TYPE_NONE) {
+ ipc_entry_dealloc(space, voucher_name, voucher_entry);
+ voucher_entry = IE_NULL;
}
dest_type = ipc_object_copyin_type(dest_type);
/*
* JMM - Without rdar://problem/6275821, this is the last place we can
* re-arm the send-possible notifications. It may trigger unexpectedly
- * early (send may NOT have failed), but better than missing.
+ * early (send may NOT have failed), but better than missing. We assure
+ * we won't miss by forcing MACH_SEND_ALWAYS if we got past arming.
*/
- if (notify && dest_type != MACH_MSG_TYPE_PORT_SEND_ONCE &&
+ if (((*optionp & MACH_SEND_NOTIFY) != 0) &&
+ dest_type != MACH_MSG_TYPE_PORT_SEND_ONCE &&
dest_entry != IE_NULL && dest_entry->ie_request != IE_REQ_NONE) {
ipc_port_t dport = (ipc_port_t)dest_port;
assert(dport != IP_NULL);
ip_lock(dport);
- if (ip_active(dport) &&
- dport->ip_receiver != ipc_space_kernel && ip_full(dport)) {
- ipc_port_request_sparm(dport, dest_name, dest_entry->ie_request);
+ if (ip_active(dport) && dport->ip_receiver != ipc_space_kernel) {
+ if (ip_full(dport)) {
+#if IMPORTANCE_INHERITANCE
+ needboost = ipc_port_request_sparm(dport, dest_name,
+ dest_entry->ie_request,
+ *optionp,
+ override);
+ if (needboost == FALSE)
+ ip_unlock(dport);
+#else
+ ipc_port_request_sparm(dport, dest_name,
+ dest_entry->ie_request,
+ *optionp,
+ override);
+ ip_unlock(dport);
+#endif /* IMPORTANCE_INHERITANCE */
+ } else {
+ *optionp |= MACH_SEND_ALWAYS;
+ ip_unlock(dport);
+ }
+ } else {
+ ip_unlock(dport);
}
- ip_unlock(dport);
}
is_write_unlock(space);
- if (dest_soright != IP_NULL)
- ipc_notify_port_deleted(dest_soright, dest_name);
+#if IMPORTANCE_INHERITANCE
+ /*
+ * If our request is the first boosting send-possible
+ * notification this cycle, push the boost down the
+ * destination port.
+ */
+ if (needboost == TRUE) {
+ ipc_port_t dport = (ipc_port_t)dest_port;
- if (reply_soright != IP_NULL)
+ /* dport still locked from above */
+ if (ipc_port_importance_delta(dport, IPID_OPTION_SENDPOSSIBLE, 1) == FALSE) {
+ ip_unlock(dport);
+ }
+ }
+#endif /* IMPORTANCE_INHERITANCE */
+
+ if (dest_soright != IP_NULL) {
+ ipc_notify_port_deleted(dest_soright, dest_name);
+ }
+ if (reply_soright != IP_NULL) {
ipc_notify_port_deleted(reply_soright, reply_name);
+ }
+ if (voucher_soright != IP_NULL) {
+ ipc_notify_port_deleted(voucher_soright, voucher_name);
+ }
+
+ /*
+ * No room to store voucher port in in-kernel msg header,
+ * so we store it back in the kmsg itself. Extract the
+ * qos, and apply any override before we enqueue the kmsg.
+ */
+ if (IP_VALID(voucher_port)) {
+
+ kmsg->ikm_voucher = voucher_port;
+ voucher_type = MACH_MSG_TYPE_MOVE_SEND;
+ }
- msg->msgh_bits = (MACH_MSGH_BITS_OTHER(mbits) |
- MACH_MSGH_BITS(dest_type, reply_type));
+ msg->msgh_bits = MACH_MSGH_BITS_SET(dest_type, reply_type, voucher_type, mbits);
msg->msgh_remote_port = (ipc_port_t)dest_port;
msg->msgh_local_port = (ipc_port_t)reply_port;
+ /* capture the qos value(s) for the kmsg */
+ ipc_kmsg_set_qos(kmsg, *optionp, override);
+
+ if (release_port != IP_NULL)
+ ip_release(release_port);
+
+ if (voucher_release_port != IP_NULL)
+ ip_release(voucher_release_port);
+
return MACH_MSG_SUCCESS;
invalid_reply:
is_write_unlock(space);
+
+ if (release_port != IP_NULL)
+ ip_release(release_port);
+
+ assert(voucher_port == IP_NULL);
+ assert(voucher_soright == IP_NULL);
+
return MACH_SEND_INVALID_REPLY;
invalid_dest:
is_write_unlock(space);
+
+ if (release_port != IP_NULL)
+ ip_release(release_port);
+
if (reply_soright != IP_NULL)
ipc_notify_port_deleted(reply_soright, reply_name);
+
+ assert(voucher_port == IP_NULL);
+ assert(voucher_soright == IP_NULL);
+
return MACH_SEND_INVALID_DEST;
}
result_disp = ipc_object_copyin_type(user_disp);
dsc->disposition = result_disp;
- if (count > (INT_MAX / sizeof(mach_port_t))) {
- *mr = MACH_SEND_TOO_LARGE;
+ /* We always do a 'physical copy', but you have to specify something valid */
+ if (copy_option != MACH_MSG_PHYSICAL_COPY &&
+ copy_option != MACH_MSG_VIRTUAL_COPY) {
+ *mr = MACH_SEND_INVALID_TYPE;
return NULL;
}
/* calculate length of data in bytes, rounding up */
- ports_length = count * sizeof(mach_port_t);
- names_length = count * sizeof(mach_port_name_t);
+
+ if (os_mul_overflow(count, sizeof(mach_port_t), &ports_length)) {
+ *mr = MACH_SEND_TOO_LARGE;
+ return NULL;
+ }
+
+ if (os_mul_overflow(count, sizeof(mach_port_name_t), &names_length)) {
+ *mr = MACH_SEND_TOO_LARGE;
+ return NULL;
+ }
if (ports_length == 0) {
return user_dsc;
vm_size_t descriptor_size = 0;
+ mach_msg_type_number_t total_ool_port_count = 0;
+
/*
* Determine if the target is a kernel port.
*/
*/
daddr = NULL;
for (i = 0; i < dsc_count; i++) {
+ mach_msg_size_t size;
+ mach_msg_type_number_t ool_port_count = 0;
+
daddr = naddr;
/* make sure the descriptor fits in the message */
if (naddr > (mach_msg_descriptor_t *)
((vm_offset_t)kmsg->ikm_header + kmsg->ikm_header->msgh_size)) {
- ipc_kmsg_clean_partial(kmsg, 0, NULL, 0, 0);
- mr = MACH_SEND_MSG_TOO_SMALL;
- goto out;
+ mr = MACH_SEND_MSG_TOO_SMALL;
+ goto clean_message;
}
switch (daddr->type.type) {
- mach_msg_size_t size;
-
case MACH_MSG_OOL_DESCRIPTOR:
case MACH_MSG_OOL_VOLATILE_DESCRIPTOR:
size = (is_task_64bit) ?
/*
* Invalid copy option
*/
- ipc_kmsg_clean_partial(kmsg, 0, NULL, 0, 0);
mr = MACH_SEND_INVALID_TYPE;
- goto out;
+ goto clean_message;
}
-
+
if ((size >= MSG_OOL_SIZE_SMALL) &&
(daddr->out_of_line.copy == MACH_MSG_PHYSICAL_COPY) &&
!(daddr->out_of_line.deallocate)) {
* Out-of-line memory descriptor, accumulate kernel
* memory requirements
*/
+ if (space_needed + round_page(size) <= space_needed) {
+ /* Overflow dectected */
+ mr = MACH_MSG_VM_KERNEL;
+ goto clean_message;
+ }
+
space_needed += round_page(size);
if (space_needed > ipc_kmsg_max_vm_space) {
-
- /*
- * Per message kernel memory limit exceeded
- */
- ipc_kmsg_clean_partial(kmsg, 0, NULL, 0, 0);
+ /* Per message kernel memory limit exceeded */
mr = MACH_MSG_VM_KERNEL;
- goto out;
+ goto clean_message;
}
}
+ break;
+ case MACH_MSG_PORT_DESCRIPTOR:
+ if (os_add_overflow(total_ool_port_count, 1, &total_ool_port_count)) {
+ /* Overflow detected */
+ mr = MACH_SEND_TOO_LARGE;
+ goto clean_message;
+ }
+ break;
+ case MACH_MSG_OOL_PORTS_DESCRIPTOR:
+ ool_port_count = (is_task_64bit) ?
+ ((mach_msg_ool_ports_descriptor64_t *)daddr)->count :
+ daddr->ool_ports.count;
+
+ if (os_add_overflow(total_ool_port_count, ool_port_count, &total_ool_port_count)) {
+ /* Overflow detected */
+ mr = MACH_SEND_TOO_LARGE;
+ goto clean_message;
+ }
+
+ if (ool_port_count > (ipc_kmsg_max_vm_space/sizeof(mach_port_t))) {
+ /* Per message kernel memory limit exceeded */
+ mr = MACH_SEND_TOO_LARGE;
+ goto clean_message;
+ }
+ break;
}
}
+ /* Sending more than 16383 rights in one message seems crazy */
+ if (total_ool_port_count >= (MACH_PORT_UREFS_MAX / 4)) {
+ mr = MACH_SEND_TOO_LARGE;
+ goto clean_message;
+ }
+
/*
* Allocate space in the pageable kernel ipc copy map for all the
* ool data that is to be physically copied. Map is marked wait for
* space.
*/
if (space_needed) {
- if (vm_allocate(ipc_kernel_copy_map, &paddr, space_needed,
- VM_FLAGS_ANYWHERE) != KERN_SUCCESS) {
- ipc_kmsg_clean_partial(kmsg, 0, NULL, 0, 0);
+ if (vm_allocate_kernel(ipc_kernel_copy_map, &paddr, space_needed,
+ VM_FLAGS_ANYWHERE, VM_KERN_MEMORY_IPC) != KERN_SUCCESS) {
mr = MACH_MSG_VM_KERNEL;
- goto out;
+ goto clean_message;
}
}
/* user_addr = just after base as it was copied in */
user_addr = (mach_msg_descriptor_t *)((vm_offset_t)kmsg->ikm_header + sizeof(mach_msg_base_t));
- /* Shift the mach_msg_base_t down to make for dsc_count*16bytes of descriptors */
+
+ /* Shift the mach_msg_base_t down to make room for dsc_count*16bytes of descriptors */
if(descriptor_size != 16*dsc_count) {
vm_offset_t dsc_adjust = 16*dsc_count - descriptor_size;
+
memmove((char *)(((vm_offset_t)kmsg->ikm_header) - dsc_adjust), kmsg->ikm_header, sizeof(mach_msg_base_t));
kmsg->ikm_header = (mach_msg_header_t *)((vm_offset_t)kmsg->ikm_header - dsc_adjust);
+
/* Update the message size for the larger in-kernel representation */
kmsg->ikm_header->msgh_size += (mach_msg_size_t)dsc_adjust;
}
}
out:
return mr;
+
+clean_message:
+ /* no descriptors have been copied in yet */
+ ipc_kmsg_clean_partial(kmsg, 0, NULL, 0, 0);
+ return mr;
}
ipc_kmsg_t kmsg,
ipc_space_t space,
vm_map_t map,
- boolean_t notify)
+ mach_msg_priority_t override,
+ mach_msg_option_t *optionp)
{
mach_msg_return_t mr;
-
- mr = ipc_kmsg_copyin_header(kmsg->ikm_header, space, notify);
+
+ kmsg->ikm_header->msgh_bits &= MACH_MSGH_BITS_USER;
+
+ mr = ipc_kmsg_copyin_header(kmsg, space, override, optionp);
+
if (mr != MACH_MSG_SUCCESS)
return mr;
-
- DEBUG_KPRINT_SYSCALL_IPC("ipc_kmsg_copyin header:\n%.8x\n%.8x\n%p\n%p\n%.8x\n%.8x\n",
- kmsg->ikm_header->msgh_size,
- kmsg->ikm_header->msgh_bits,
- kmsg->ikm_header->msgh_remote_port,
- kmsg->ikm_header->msgh_local_port,
- kmsg->ikm_header->msgh_reserved,
- kmsg->ikm_header->msgh_id);
+
+ KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_IPC,MACH_IPC_MSG_SEND) | DBG_FUNC_NONE,
+ VM_KERNEL_ADDRPERM((uintptr_t)kmsg),
+ (uintptr_t)kmsg->ikm_header->msgh_bits,
+ (uintptr_t)kmsg->ikm_header->msgh_id,
+ VM_KERNEL_ADDRPERM((uintptr_t)unsafe_convert_port_to_voucher(kmsg->ikm_voucher)),
+ 0);
+
+ DEBUG_KPRINT_SYSCALL_IPC("ipc_kmsg_copyin header:\n%.8x\n%.8x\n%p\n%p\n%p\n%.8x\n",
+ kmsg->ikm_header->msgh_size,
+ kmsg->ikm_header->msgh_bits,
+ kmsg->ikm_header->msgh_remote_port,
+ kmsg->ikm_header->msgh_local_port,
+ kmsg->ikm_voucher,
+ kmsg->ikm_header->msgh_id);
if ((kmsg->ikm_header->msgh_bits & MACH_MSGH_BITS_COMPLEX) == 0)
return MACH_MSG_SUCCESS;
mr = ipc_kmsg_copyin_body( kmsg, space, map);
+ /* unreachable if !DEBUG */
+ __unreachable_ok_push
if (DEBUG_KPRINT_SYSCALL_PREDICATE(DEBUG_KPRINT_SYSCALL_IPC_MASK))
{
kprintf("body:\n");
kprintf("%.4x\n",((uint32_t *)(kmsg->ikm_header + 1))[i]);
}
}
+ __unreachable_ok_pop
+
return mr;
}
* Because the message comes from the kernel,
* the implementation assumes there are no errors
* or peculiarities in the message.
- *
- * Returns TRUE if queueing the message
- * would result in a circularity.
* Conditions:
* Nothing locked.
*/
mach_msg_return_t
ipc_kmsg_copyout_header(
- mach_msg_header_t *msg,
- ipc_space_t space)
+ ipc_kmsg_t kmsg,
+ ipc_space_t space,
+ mach_msg_option_t option)
{
+ mach_msg_header_t *msg = kmsg->ikm_header;
mach_msg_bits_t mbits = msg->msgh_bits;
ipc_port_t dest = (ipc_port_t) msg->msgh_remote_port;
{
mach_msg_type_name_t dest_type = MACH_MSGH_BITS_REMOTE(mbits);
mach_msg_type_name_t reply_type = MACH_MSGH_BITS_LOCAL(mbits);
- ipc_port_t reply = (ipc_port_t) msg->msgh_local_port;
+ mach_msg_type_name_t voucher_type = MACH_MSGH_BITS_VOUCHER(mbits);
+ ipc_port_t reply = msg->msgh_local_port;
+ ipc_port_t release_reply_port = IP_NULL;
mach_port_name_t dest_name, reply_name;
+ ipc_port_t voucher = kmsg->ikm_voucher;
+ ipc_port_t release_voucher_port = IP_NULL;
+ mach_port_name_t voucher_name;
+
+ uint32_t entries_held = 0;
+ boolean_t need_write_lock = FALSE;
+ kern_return_t kr;
+
+ /*
+ * Reserve any potentially needed entries in the target space.
+ * We'll free any unused before unlocking the space.
+ */
if (IP_VALID(reply)) {
- ipc_entry_t entry;
- kern_return_t kr;
+ entries_held++;
+ need_write_lock = TRUE;
+ }
+ if (IP_VALID(voucher)) {
+ assert(voucher_type == MACH_MSG_TYPE_MOVE_SEND);
- /*
- * Get reply port entry (if none, skip to dest port
- * copyout). This may require growing the space.
- */
+ if ((option & MACH_RCV_VOUCHER) != 0)
+ entries_held++;
+ need_write_lock = TRUE;
+ }
+
+ if (need_write_lock) {
is_write_lock(space);
- for (;;) {
- if (!space->is_active) {
+ while(entries_held) {
+ if (!is_active(space)) {
is_write_unlock(space);
return (MACH_RCV_HEADER_ERROR|
MACH_MSG_IPC_SPACE);
}
+
+ kr = ipc_entries_hold(space, entries_held);
+ if (KERN_SUCCESS == kr)
+ break;
+ kr = ipc_entry_grow_table(space, ITS_SIZE_NONE);
+ if (KERN_SUCCESS != kr)
+ return(MACH_RCV_HEADER_ERROR|
+ MACH_MSG_IPC_SPACE);
+ /* space was unlocked and relocked - retry */
+ }
+
+ /* Handle reply port. */
+ if (IP_VALID(reply)) {
+ ipc_entry_t entry;
+
+ /* Is there already an entry we can use? */
if ((reply_type != MACH_MSG_TYPE_PORT_SEND_ONCE) &&
- ipc_right_reverse(space, (ipc_object_t) reply,
- &reply_name, &entry)) {
+ ipc_right_reverse(space, (ipc_object_t) reply, &reply_name, &entry)) {
/* reply port is locked and active */
- assert(entry->ie_bits &
- MACH_PORT_TYPE_SEND_RECEIVE);
- break;
+ assert(entry->ie_bits & MACH_PORT_TYPE_SEND_RECEIVE);
+ } else {
+ ip_lock(reply);
+ if (!ip_active(reply)) {
+ ip_unlock(reply);
+
+ release_reply_port = reply;
+ reply = IP_DEAD;
+ reply_name = MACH_PORT_DEAD;
+ goto done_with_reply;
+ }
+
+ /* claim a held entry for the reply port */
+ assert(entries_held > 0);
+ entries_held--;
+ ipc_entry_claim(space, &reply_name, &entry);
+ assert(IE_BITS_TYPE(entry->ie_bits) == MACH_PORT_TYPE_NONE);
+ assert(entry->ie_object == IO_NULL);
+ entry->ie_object = (ipc_object_t) reply;
}
- ip_lock(reply);
- if (!ip_active(reply)) {
- ip_release(reply);
- ip_check_unlock(reply);
+ /* space and reply port are locked and active */
+ ip_reference(reply); /* hold onto the reply port */
- ip_lock(dest);
- is_write_unlock(space);
+ kr = ipc_right_copyout(space, reply_name, entry,
+ reply_type, TRUE, (ipc_object_t) reply);
+ assert(kr == KERN_SUCCESS);
+ /* reply port is unlocked */
+ } else
+ reply_name = CAST_MACH_PORT_TO_NAME(reply);
- reply = IP_DEAD;
- reply_name = MACH_PORT_DEAD;
- goto copyout_dest;
- }
+ done_with_reply:
- reply_name = CAST_MACH_PORT_TO_NAME(reply);
- kr = ipc_entry_get(space, &reply_name, &entry);
- if (kr != KERN_SUCCESS) {
- ip_unlock(reply);
-
- /* space is locked */
- kr = ipc_entry_grow_table(space,
- ITS_SIZE_NONE);
- if (kr != KERN_SUCCESS) {
- return (MACH_RCV_HEADER_ERROR|
- MACH_MSG_IPC_SPACE);
- }
- /* space is locked again; start over */
+ /* Handle voucher port. */
+ if (voucher_type != MACH_MSGH_BITS_ZERO) {
+ assert(voucher_type == MACH_MSG_TYPE_MOVE_SEND);
- continue;
+ if (!IP_VALID(voucher)) {
+ if ((option & MACH_RCV_VOUCHER) == 0) {
+ voucher_type = MACH_MSGH_BITS_ZERO;
+ }
+ voucher_name = MACH_PORT_NULL;
+ goto done_with_voucher;
}
- assert(IE_BITS_TYPE(entry->ie_bits) ==
- MACH_PORT_TYPE_NONE);
- assert(entry->ie_object == IO_NULL);
-
- entry->ie_object = (ipc_object_t) reply;
- break;
+
+ /* clear voucher from its hiding place back in the kmsg */
+ kmsg->ikm_voucher = IP_NULL;
+
+ if ((option & MACH_RCV_VOUCHER) != 0) {
+ ipc_entry_t entry;
+
+ if (ipc_right_reverse(space, (ipc_object_t) voucher,
+ &voucher_name, &entry)) {
+ /* voucher port locked */
+ assert(entry->ie_bits & MACH_PORT_TYPE_SEND);
+ } else {
+ assert(entries_held > 0);
+ entries_held--;
+ ipc_entry_claim(space, &voucher_name, &entry);
+ assert(IE_BITS_TYPE(entry->ie_bits) == MACH_PORT_TYPE_NONE);
+ assert(entry->ie_object == IO_NULL);
+ entry->ie_object = (ipc_object_t) voucher;
+ ip_lock(voucher);
+ }
+ /* space is locked and active */
+
+ assert(ip_active(voucher));
+ assert(ip_kotype(voucher) == IKOT_VOUCHER);
+ kr = ipc_right_copyout(space, voucher_name, entry,
+ MACH_MSG_TYPE_MOVE_SEND, TRUE,
+ (ipc_object_t) voucher);
+ /* voucher port is unlocked */
+ } else {
+ voucher_type = MACH_MSGH_BITS_ZERO;
+ release_voucher_port = voucher;
+ voucher_name = MACH_PORT_NULL;
+ }
+ } else {
+ voucher_name = msg->msgh_voucher_port;
}
- /* space and reply port are locked and active */
-
- ip_reference(reply); /* hold onto the reply port */
-
- kr = ipc_right_copyout(space, reply_name, entry,
- reply_type, TRUE, (ipc_object_t) reply);
- /* reply port is unlocked */
- assert(kr == KERN_SUCCESS);
+ done_with_voucher:
ip_lock(dest);
is_write_unlock(space);
+
} else {
/*
- * No reply port! This is an easy case.
+ * No reply or voucher port! This is an easy case.
* We only need to have the space locked
* when locking the destination.
*/
is_read_lock(space);
- if (!space->is_active) {
+ if (!is_active(space)) {
is_read_unlock(space);
return MACH_RCV_HEADER_ERROR|MACH_MSG_IPC_SPACE;
}
is_read_unlock(space);
reply_name = CAST_MACH_PORT_TO_NAME(reply);
+
+ if (voucher_type != MACH_MSGH_BITS_ZERO) {
+ assert(voucher_type == MACH_MSG_TYPE_MOVE_SEND);
+ if ((option & MACH_RCV_VOUCHER) == 0) {
+ voucher_type = MACH_MSGH_BITS_ZERO;
+ }
+ voucher_name = MACH_PORT_NULL;
+ } else {
+ voucher_name = msg->msgh_voucher_port;
+ }
}
/*
* is done correctly.
*/
- copyout_dest:
-
if (ip_active(dest)) {
ipc_object_copyout_dest(space, (ipc_object_t) dest,
dest_type, &dest_name);
/* dest is unlocked */
+
} else {
ipc_port_timestamp_t timestamp;
timestamp = dest->ip_timestamp;
+ ip_unlock(dest);
ip_release(dest);
- ip_check_unlock(dest);
if (IP_VALID(reply)) {
ip_lock(reply);
}
if (IP_VALID(reply))
- ipc_port_release(reply);
+ ip_release(reply);
+
+ if (IP_VALID(release_reply_port)) {
+ if (reply_type == MACH_MSG_TYPE_PORT_SEND_ONCE)
+ ipc_port_release_sonce(release_reply_port);
+ else
+ ipc_port_release_send(release_reply_port);
+ }
+
+ if (IP_VALID(release_voucher_port))
+ ipc_port_release_send(release_voucher_port);
+
- msg->msgh_bits = (MACH_MSGH_BITS_OTHER(mbits) |
- MACH_MSGH_BITS(reply_type, dest_type));
+ if ((option & MACH_RCV_VOUCHER) != 0) {
+ KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_IPC, MACH_IPC_MSG_RECV) | DBG_FUNC_NONE,
+ VM_KERNEL_ADDRPERM((uintptr_t)kmsg),
+ (uintptr_t)kmsg->ikm_header->msgh_bits,
+ (uintptr_t)kmsg->ikm_header->msgh_id,
+ VM_KERNEL_ADDRPERM((uintptr_t)unsafe_convert_port_to_voucher(voucher)),
+ 0);
+ } else {
+ KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_IPC, MACH_IPC_MSG_RECV_VOUCHER_REFUSED) | DBG_FUNC_NONE,
+ VM_KERNEL_ADDRPERM((uintptr_t)kmsg),
+ (uintptr_t)kmsg->ikm_header->msgh_bits,
+ (uintptr_t)kmsg->ikm_header->msgh_id,
+ VM_KERNEL_ADDRPERM((uintptr_t)unsafe_convert_port_to_voucher(voucher)),
+ 0);
+ }
+
+ msg->msgh_bits = MACH_MSGH_BITS_SET(reply_type, dest_type,
+ voucher_type, mbits);
msg->msgh_local_port = CAST_MACH_NAME_TO_PORT(dest_name);
msg->msgh_remote_port = CAST_MACH_NAME_TO_PORT(reply_name);
+ msg->msgh_voucher_port = voucher_name;
}
- return MACH_MSG_SUCCESS;
+ return MACH_MSG_SUCCESS;
}
/*
{
mach_msg_port_descriptor_t *user_dsc = (typeof(user_dsc))dest_dsc;
user_dsc--; // point to the start of this port descriptor
+ bzero((void *)user_dsc, sizeof(*user_dsc));
user_dsc->name = CAST_MACH_NAME_TO_PORT(name);
user_dsc->disposition = disp;
user_dsc->type = MACH_MSG_PORT_DESCRIPTOR;
} else {
mach_msg_legacy_port_descriptor_t *user_dsc = (typeof(user_dsc))dest_dsc;
user_dsc--; // point to the start of this port descriptor
+ bzero((void *)user_dsc, sizeof(*user_dsc));
user_dsc->name = CAST_MACH_PORT_TO_NAME(name);
user_dsc->disposition = disp;
user_dsc->type = MACH_MSG_PORT_DESCRIPTOR;
ipc_kmsg_copyout_ool_descriptor(mach_msg_ool_descriptor_t *dsc, mach_msg_descriptor_t *user_dsc, int is_64bit, vm_map_t map, mach_msg_return_t *mr)
{
vm_map_copy_t copy;
- mach_vm_offset_t rcv_addr;
+ vm_map_address_t rcv_addr;
mach_msg_copy_options_t copy_options;
- mach_msg_size_t size;
+ vm_map_size_t size;
mach_msg_descriptor_type_t dsc_type;
//SKIP_PORT_DESCRIPTORS(saddr, sdsc_count);
- copy = (vm_map_copy_t) dsc->address;
- size = dsc->size;
+ copy = (vm_map_copy_t)dsc->address;
+ size = (vm_map_size_t)dsc->size;
copy_options = dsc->copy;
assert(copy_options != MACH_MSG_KALLOC_COPY_T);
dsc_type = dsc->type;
- rcv_addr = 0;
if (copy != VM_MAP_COPY_NULL) {
- /*
- * Check to see if there is an overwrite descriptor
- * specified in the scatter list for this ool data.
- * The descriptor has already been verified.
- */
-#if 0
- if (saddr != MACH_MSG_DESCRIPTOR_NULL) {
- if (differs) {
- OTHER_OOL_DESCRIPTOR *scatter_dsc;
-
- scatter_dsc = (OTHER_OOL_DESCRIPTOR *)saddr;
- if (scatter_dsc->copy == MACH_MSG_OVERWRITE) {
- rcv_addr = (mach_vm_offset_t) scatter_dsc->address;
- copy_options = MACH_MSG_OVERWRITE;
- } else {
- copy_options = MACH_MSG_VIRTUAL_COPY;
- }
- } else {
- mach_msg_ool_descriptor_t *scatter_dsc;
-
- scatter_dsc = &saddr->out_of_line;
- if (scatter_dsc->copy == MACH_MSG_OVERWRITE) {
- rcv_addr = CAST_USER_ADDR_T(scatter_dsc->address);
- copy_options = MACH_MSG_OVERWRITE;
- } else {
- copy_options = MACH_MSG_VIRTUAL_COPY;
- }
- }
- INCREMENT_SCATTER(saddr, sdsc_count, differs);
- }
-#endif
-
+ kern_return_t kr;
- /*
- * Whether the data was virtually or physically
- * copied we have a vm_map_copy_t for it.
- * If there's an overwrite region specified
- * overwrite it, otherwise do a virtual copy out.
- */
- kern_return_t kr;
- if (copy_options == MACH_MSG_OVERWRITE && rcv_addr != 0) {
- kr = vm_map_copy_overwrite(map, rcv_addr,
- copy, TRUE);
- } else {
- kr = vm_map_copyout(map, &rcv_addr, copy);
- }
+ rcv_addr = 0;
+ if (vm_map_copy_validate_size(map, copy, &size) == FALSE)
+ panic("Inconsistent OOL/copyout size on %p: expected %d, got %lld @%p",
+ dsc, dsc->size, (unsigned long long)copy->size, copy);
+ kr = vm_map_copyout_size(map, &rcv_addr, copy, size);
if (kr != KERN_SUCCESS) {
if (kr == KERN_RESOURCE_SHORTAGE)
*mr |= MACH_MSG_VM_KERNEL;
{
mach_msg_ool_descriptor_t *user_ool_dsc = (typeof(user_ool_dsc))user_dsc;
user_ool_dsc--;
+ bzero((void *)user_ool_dsc, sizeof(*user_ool_dsc));
user_ool_dsc->address = (void *)(uintptr_t)rcv_addr;
user_ool_dsc->deallocate = (copy_options == MACH_MSG_VIRTUAL_COPY) ?
TRUE : FALSE;
user_ool_dsc->copy = copy_options;
user_ool_dsc->type = dsc_type;
- user_ool_dsc->size = size;
+ user_ool_dsc->size = (mach_msg_size_t)size;
user_dsc = (typeof(user_dsc))user_ool_dsc;
} else if (is_64bit) {
mach_msg_ool_descriptor64_t *user_ool_dsc = (typeof(user_ool_dsc))user_dsc;
user_ool_dsc--;
+ bzero((void *)user_ool_dsc, sizeof(*user_ool_dsc));
user_ool_dsc->address = rcv_addr;
user_ool_dsc->deallocate = (copy_options == MACH_MSG_VIRTUAL_COPY) ?
TRUE : FALSE;
user_ool_dsc->copy = copy_options;
user_ool_dsc->type = dsc_type;
- user_ool_dsc->size = size;
+ user_ool_dsc->size = (mach_msg_size_t)size;
user_dsc = (typeof(user_dsc))user_ool_dsc;
} else {
mach_msg_ool_descriptor32_t *user_ool_dsc = (typeof(user_ool_dsc))user_dsc;
user_ool_dsc--;
+ bzero((void *)user_ool_dsc, sizeof(*user_ool_dsc));
user_ool_dsc->address = CAST_DOWN_EXPLICIT(uint32_t, rcv_addr);
- user_ool_dsc->size = size;
+ user_ool_dsc->size = (mach_msg_size_t)size;
user_ool_dsc->deallocate = (copy_options == MACH_MSG_VIRTUAL_COPY) ?
TRUE : FALSE;
user_ool_dsc->copy = copy_options;
ipc_kmsg_t kmsg,
mach_msg_return_t *mr)
{
- mach_vm_offset_t rcv_addr;
+ mach_vm_offset_t rcv_addr = 0;
mach_msg_type_name_t disp;
mach_msg_type_number_t count, i;
vm_size_t ports_length, names_length;
/*
* Dynamically allocate the region
*/
- int anywhere = VM_MAKE_TAG(VM_MEMORY_MACH_MSG)|
- VM_FLAGS_ANYWHERE;
+ vm_tag_t tag;
+ if (vm_kernel_map_is_kernel(map)) tag = VM_KERN_MEMORY_IPC;
+ else tag = VM_MEMORY_MACH_MSG;
kern_return_t kr;
- if ((kr = mach_vm_allocate(map, &rcv_addr,
+ if ((kr = mach_vm_allocate_kernel(map, &rcv_addr,
(mach_vm_size_t)names_length,
- anywhere)) != KERN_SUCCESS) {
+ VM_FLAGS_ANYWHERE, tag)) != KERN_SUCCESS) {
ipc_kmsg_clean_body(kmsg, 1, (mach_msg_descriptor_t *)dsc);
rcv_addr = 0;
if(current_task() == kernel_task) {
mach_msg_ool_ports_descriptor_t *user_ool_dsc = (typeof(user_ool_dsc))user_dsc;
user_ool_dsc--;
+ bzero((void *)user_ool_dsc, sizeof(*user_ool_dsc));
user_ool_dsc->address = (void *)(uintptr_t)rcv_addr;
user_ool_dsc->deallocate = (copy_options == MACH_MSG_VIRTUAL_COPY) ?
} if (is_64bit) {
mach_msg_ool_ports_descriptor64_t *user_ool_dsc = (typeof(user_ool_dsc))user_dsc;
user_ool_dsc--;
+ bzero((void *)user_ool_dsc, sizeof(*user_ool_dsc));
user_ool_dsc->address = rcv_addr;
user_ool_dsc->deallocate = (copy_options == MACH_MSG_VIRTUAL_COPY) ?
} else {
mach_msg_ool_ports_descriptor32_t *user_ool_dsc = (typeof(user_ool_dsc))user_dsc;
user_ool_dsc--;
+ bzero((void *)user_ool_dsc, sizeof(*user_ool_dsc));
user_ool_dsc->address = CAST_DOWN_EXPLICIT(uint32_t, rcv_addr);
user_ool_dsc->count = count;
ipc_kmsg_t kmsg,
ipc_space_t space,
vm_map_t map,
- mach_msg_body_t *slist)
+ mach_msg_body_t *slist,
+ mach_msg_option_t option)
{
mach_msg_return_t mr;
- mr = ipc_kmsg_copyout_header(kmsg->ikm_header, space);
+ mr = ipc_kmsg_copyout_header(kmsg, space, option);
if (mr != MACH_MSG_SUCCESS) {
return mr;
}
mach_msg_bits_t mbits = kmsg->ikm_header->msgh_bits;
ipc_object_t dest = (ipc_object_t) kmsg->ikm_header->msgh_remote_port;
ipc_object_t reply = (ipc_object_t) kmsg->ikm_header->msgh_local_port;
+ ipc_object_t voucher = (ipc_object_t) kmsg->ikm_voucher;
mach_msg_type_name_t dest_type = MACH_MSGH_BITS_REMOTE(mbits);
mach_msg_type_name_t reply_type = MACH_MSGH_BITS_LOCAL(mbits);
+ mach_msg_type_name_t voucher_type = MACH_MSGH_BITS_VOUCHER(mbits);
+ mach_port_name_t voucher_name = kmsg->ikm_header->msgh_voucher_port;
mach_port_name_t dest_name, reply_name;
mach_msg_return_t mr;
+ /* Set ith_knote to ITH_KNOTE_PSEUDO */
+ current_thread()->ith_knote = ITH_KNOTE_PSEUDO;
+
assert(IO_VALID(dest));
+#if 0
+ /*
+ * If we did this here, it looks like we wouldn't need the undo logic
+ * at the end of ipc_kmsg_send() in the error cases. Not sure which
+ * would be more elegant to keep.
+ */
+ ipc_importance_clean(kmsg);
+#else
+ /* just assert it is already clean */
+ ipc_importance_assert_clean(kmsg);
+#endif
+
mr = (ipc_kmsg_copyout_object(space, dest, dest_type, &dest_name) |
ipc_kmsg_copyout_object(space, reply, reply_type, &reply_name));
- kmsg->ikm_header->msgh_bits = mbits &~ MACH_MSGH_BITS_CIRCULAR;
+ kmsg->ikm_header->msgh_bits = mbits & MACH_MSGH_BITS_USER;
kmsg->ikm_header->msgh_remote_port = CAST_MACH_NAME_TO_PORT(dest_name);
kmsg->ikm_header->msgh_local_port = CAST_MACH_NAME_TO_PORT(reply_name);
+ if (IO_VALID(voucher)) {
+ assert(voucher_type == MACH_MSG_TYPE_MOVE_SEND);
+
+ kmsg->ikm_voucher = IP_NULL;
+ mr |= ipc_kmsg_copyout_object(space, voucher, voucher_type, &voucher_name);
+ kmsg->ikm_header->msgh_voucher_port = voucher_name;
+ }
+
if (mbits & MACH_MSGH_BITS_COMPLEX) {
mr |= ipc_kmsg_copyout_body(kmsg, space, map, slist);
}
mach_msg_bits_t mbits;
ipc_object_t dest;
ipc_object_t reply;
+ ipc_object_t voucher;
mach_msg_type_name_t dest_type;
mach_msg_type_name_t reply_type;
- mach_port_name_t dest_name, reply_name;
+ mach_msg_type_name_t voucher_type;
+ mach_port_name_t dest_name, reply_name, voucher_name;
mbits = kmsg->ikm_header->msgh_bits;
dest = (ipc_object_t) kmsg->ikm_header->msgh_remote_port;
reply = (ipc_object_t) kmsg->ikm_header->msgh_local_port;
+ voucher = (ipc_object_t) kmsg->ikm_voucher;
+ voucher_name = kmsg->ikm_header->msgh_voucher_port;
dest_type = MACH_MSGH_BITS_REMOTE(mbits);
reply_type = MACH_MSGH_BITS_LOCAL(mbits);
+ voucher_type = MACH_MSGH_BITS_VOUCHER(mbits);
assert(IO_VALID(dest));
+ ipc_importance_assert_clean(kmsg);
+
io_lock(dest);
if (io_active(dest)) {
ipc_object_copyout_dest(space, dest, dest_type, &dest_name);
/* dest is unlocked */
} else {
+ io_unlock(dest);
io_release(dest);
- io_check_unlock(dest);
dest_name = MACH_PORT_DEAD;
}
} else
reply_name = CAST_MACH_PORT_TO_NAME(reply);
- kmsg->ikm_header->msgh_bits = (MACH_MSGH_BITS_OTHER(mbits) |
- MACH_MSGH_BITS(reply_type, dest_type));
+ if (IO_VALID(voucher)) {
+ assert(voucher_type == MACH_MSG_TYPE_MOVE_SEND);
+
+ kmsg->ikm_voucher = IP_NULL;
+ ipc_object_destroy((ipc_object_t)voucher, voucher_type);
+ voucher_name = MACH_PORT_NULL;
+ }
+
+ kmsg->ikm_header->msgh_bits = MACH_MSGH_BITS_SET(reply_type, dest_type,
+ voucher_type, mbits);
kmsg->ikm_header->msgh_local_port = CAST_MACH_NAME_TO_PORT(dest_name);
kmsg->ikm_header->msgh_remote_port = CAST_MACH_NAME_TO_PORT(reply_name);
+ kmsg->ikm_header->msgh_voucher_port = voucher_name;
if (mbits & MACH_MSGH_BITS_COMPLEX) {
mach_msg_body_t *body;
}
}
-/*
- * Routine: ipc_kmsg_copyin_scatter
- * Purpose:
- * allocate and copyin a scatter list
- * Algorithm:
- * The gather (kmsg) is valid since it has been copied in.
- * Gather list descriptors are sequentially paired with scatter
- * list descriptors, with port descriptors in either list ignored.
- * Descriptors are consistent if the type fileds match and size
- * of the scatter descriptor is less than or equal to the
- * size of the gather descriptor. A MACH_MSG_ALLOCATE copy
- * strategy in a scatter descriptor matches any size in the
- * corresponding gather descriptor assuming they are the same type.
- * Either list may be larger than the other. During the
- * subsequent copy out, excess scatter descriptors are ignored
- * and excess gather descriptors default to dynamic allocation.
- *
- * In the case of a size error, the scatter list is released.
- * Conditions:
- * Nothing locked.
- * Returns:
- * the allocated message body containing the scatter list.
- */
-
-mach_msg_body_t *
-ipc_kmsg_get_scatter(
- mach_vm_address_t msg_addr,
- mach_msg_size_t slist_size,
- ipc_kmsg_t kmsg)
-{
- mach_msg_body_t *slist;
- mach_msg_body_t *body;
- mach_msg_descriptor_t *gstart, *gend;
- mach_msg_descriptor_t *sstart, *send;
-
-#if defined(__LP64__)
- panic("ipc_kmsg_get_scatter called!");
-#endif
-
- if (slist_size < sizeof(mach_msg_base_t))
- return MACH_MSG_BODY_NULL;
-
- slist_size -= (mach_msg_size_t)sizeof(mach_msg_header_t);
- slist = (mach_msg_body_t *)kalloc(slist_size);
- if (slist == MACH_MSG_BODY_NULL)
- return slist;
-
- if (copyin(msg_addr + sizeof(mach_msg_header_t), (char *)slist, slist_size)) {
- kfree(slist, slist_size);
- return MACH_MSG_BODY_NULL;
- }
-
- if ((slist->msgh_descriptor_count* sizeof(mach_msg_descriptor_t)
- + sizeof(mach_msg_size_t)) > slist_size) {
- kfree(slist, slist_size);
- return MACH_MSG_BODY_NULL;
- }
-
- body = (mach_msg_body_t *) (kmsg->ikm_header + 1);
- gstart = (mach_msg_descriptor_t *) (body + 1);
- gend = gstart + body->msgh_descriptor_count;
-
- sstart = (mach_msg_descriptor_t *) (slist + 1);
- send = sstart + slist->msgh_descriptor_count;
-
- while (gstart < gend) {
- mach_msg_descriptor_type_t g_type;
-
- /*
- * Skip port descriptors in gather list.
- */
- g_type = gstart->type.type;
-
- if (g_type != MACH_MSG_PORT_DESCRIPTOR) {
-
- /*
- * A scatter list with a 0 descriptor count is treated as an
- * automatic size mismatch.
- */
- if (slist->msgh_descriptor_count == 0) {
- kfree(slist, slist_size);
- return MACH_MSG_BODY_NULL;
- }
-
- /*
- * Skip port descriptors in scatter list.
- */
- while (sstart < send) {
- if (sstart->type.type != MACH_MSG_PORT_DESCRIPTOR)
- break;
- sstart++;
- }
-
- /*
- * No more scatter descriptors, we're done
- */
- if (sstart >= send) {
- break;
- }
-
- /*
- * Check type, copy and size fields
- */
- if (g_type == MACH_MSG_OOL_DESCRIPTOR ||
- g_type == MACH_MSG_OOL_VOLATILE_DESCRIPTOR) {
- if (sstart->type.type != MACH_MSG_OOL_DESCRIPTOR &&
- sstart->type.type != MACH_MSG_OOL_VOLATILE_DESCRIPTOR) {
- kfree(slist, slist_size);
- return MACH_MSG_BODY_NULL;
- }
- if (sstart->out_of_line.copy == MACH_MSG_OVERWRITE &&
- gstart->out_of_line.size > sstart->out_of_line.size) {
- kfree(slist, slist_size);
- return MACH_MSG_BODY_NULL;
- }
- }
- else {
- if (sstart->type.type != MACH_MSG_OOL_PORTS_DESCRIPTOR) {
- kfree(slist, slist_size);
- return MACH_MSG_BODY_NULL;
- }
- if (sstart->ool_ports.copy == MACH_MSG_OVERWRITE &&
- gstart->ool_ports.count > sstart->ool_ports.count) {
- kfree(slist, slist_size);
- return MACH_MSG_BODY_NULL;
- }
- }
- sstart++;
- }
- gstart++;
- }
- return slist;
-}
-
-
-/*
- * Routine: ipc_kmsg_free_scatter
- * Purpose:
- * Deallocate a scatter list. Since we actually allocated
- * a body without a header, and since the header was originally
- * accounted for in slist_size, we have to ajust it down
- * before freeing the scatter list.
- */
-void
-ipc_kmsg_free_scatter(
- mach_msg_body_t *slist,
- mach_msg_size_t slist_size)
-{
-#if defined(__LP64__)
- panic("%s called; halting!", __func__);
-#endif
-
- slist_size -= (mach_msg_size_t)sizeof(mach_msg_header_t);
- kfree(slist, slist_size);
-}
-
-
/*
* Routine: ipc_kmsg_copyout_to_kernel
* Purpose:
ipc_object_copyout_dest(space, dest, dest_type, &dest_name);
/* dest is unlocked */
} else {
+ io_unlock(dest);
io_release(dest);
- io_check_unlock(dest);
dest_name = MACH_PORT_DEAD;
}
ipc_object_copyout_dest(space, dest, dest_type, &dest_name);
/* dest is unlocked */
} else {
+ io_unlock(dest);
io_release(dest);
- io_check_unlock(dest);
dest_name = MACH_PORT_DEAD;
}
}
#endif /* IKM_SUPPORT_LEGACY */
-
-#include <mach_kdb.h>
-#if MACH_KDB
-
-#include <ddb/db_output.h>
-#include <ipc/ipc_print.h>
+#ifdef __arm64__
/*
- * Forward declarations
+ * Just sets those parts of the trailer that aren't set up at allocation time.
*/
-void ipc_msg_print_untyped(
- mach_msg_body_t *body);
-
-const char * ipc_type_name(
- int type_name,
- boolean_t received);
-
-const char *
-msgh_bit_decode(
- mach_msg_bits_t bit);
-
-const char *
-mm_copy_options_string(
- mach_msg_copy_options_t option);
-
-void db_print_msg_uid(mach_msg_header_t *);
-
-
-const char *
-ipc_type_name(
- int type_name,
- boolean_t received)
-{
- switch (type_name) {
- case MACH_MSG_TYPE_PORT_NAME:
- return "port_name";
-
- case MACH_MSG_TYPE_MOVE_RECEIVE:
- if (received) {
- return "port_receive";
- } else {
- return "move_receive";
- }
-
- case MACH_MSG_TYPE_MOVE_SEND:
- if (received) {
- return "port_send";
- } else {
- return "move_send";
- }
-
- case MACH_MSG_TYPE_MOVE_SEND_ONCE:
- if (received) {
- return "port_send_once";
- } else {
- return "move_send_once";
- }
-
- case MACH_MSG_TYPE_COPY_SEND:
- return "copy_send";
-
- case MACH_MSG_TYPE_MAKE_SEND:
- return "make_send";
-
- case MACH_MSG_TYPE_MAKE_SEND_ONCE:
- return "make_send_once";
-
- default:
- return (char *) 0;
- }
-}
-
-void
-ipc_print_type_name(
- int type_name)
+static void
+ipc_kmsg_munge_trailer(mach_msg_max_trailer_t *in, void *_out, boolean_t is64bit)
{
- const char *name = ipc_type_name(type_name, TRUE);
- if (name) {
- printf("%s", name);
+ if (is64bit) {
+ mach_msg_max_trailer64_t *out = (mach_msg_max_trailer64_t*)_out;
+ out->msgh_seqno = in->msgh_seqno;
+ out->msgh_context = in->msgh_context;
+ out->msgh_trailer_size = in->msgh_trailer_size;
+ out->msgh_ad = in->msgh_ad;
} else {
- printf("type%d", type_name);
+ mach_msg_max_trailer32_t *out = (mach_msg_max_trailer32_t*)_out;
+ out->msgh_seqno = in->msgh_seqno;
+ out->msgh_context = (mach_port_context32_t)in->msgh_context;
+ out->msgh_trailer_size = in->msgh_trailer_size;
+ out->msgh_ad = in->msgh_ad;
}
}
+#endif /* __arm64__ */
-/*
- * ipc_kmsg_print [ debug ]
- */
-void
-ipc_kmsg_print(
- ipc_kmsg_t kmsg)
+mach_msg_trailer_size_t
+ipc_kmsg_add_trailer(ipc_kmsg_t kmsg, ipc_space_t space __unused,
+ mach_msg_option_t option, thread_t thread,
+ mach_port_seqno_t seqno, boolean_t minimal_trailer,
+ mach_vm_offset_t context)
{
- iprintf("kmsg=0x%x\n", kmsg);
- iprintf("ikm_next=0x%x, prev=0x%x, size=%d",
- kmsg->ikm_next,
- kmsg->ikm_prev,
- kmsg->ikm_size);
- printf("\n");
- ipc_msg_print(kmsg->ikm_header);
-}
-
-const char *
-msgh_bit_decode(
- mach_msg_bits_t bit)
-{
- switch (bit) {
- case MACH_MSGH_BITS_COMPLEX: return "complex";
- case MACH_MSGH_BITS_CIRCULAR: return "circular";
- default: return (char *) 0;
- }
-}
-
-/*
- * ipc_msg_print [ debug ]
- */
-void
-ipc_msg_print(
- mach_msg_header_t *msgh)
-{
- mach_msg_bits_t mbits;
- unsigned int bit, i;
- const char *bit_name;
- int needs_comma;
+ mach_msg_max_trailer_t *trailer;
- mbits = msgh->msgh_bits;
- iprintf("msgh_bits=0x%x: l=0x%x,r=0x%x\n",
- mbits,
- MACH_MSGH_BITS_LOCAL(msgh->msgh_bits),
- MACH_MSGH_BITS_REMOTE(msgh->msgh_bits));
+#ifdef __arm64__
+ mach_msg_max_trailer_t tmp_trailer; /* This accommodates U64, and we'll munge */
+ void *real_trailer_out = (void*)(mach_msg_max_trailer_t *)
+ ((vm_offset_t)kmsg->ikm_header +
+ round_msg(kmsg->ikm_header->msgh_size));
- mbits = MACH_MSGH_BITS_OTHER(mbits) & MACH_MSGH_BITS_USED;
- db_indent += 2;
- if (mbits)
- iprintf("decoded bits: ");
- needs_comma = 0;
- for (i = 0, bit = 1; i < sizeof(mbits) * 8; ++i, bit <<= 1) {
- if ((mbits & bit) == 0)
- continue;
- bit_name = msgh_bit_decode((mach_msg_bits_t)bit);
- if (bit_name)
- printf("%s%s", needs_comma ? "," : "", bit_name);
- else
- printf("%sunknown(0x%x),", needs_comma ? "," : "", bit);
- ++needs_comma;
- }
- if (msgh->msgh_bits & ~MACH_MSGH_BITS_USED) {
- printf("%sunused=0x%x,", needs_comma ? "," : "",
- msgh->msgh_bits & ~MACH_MSGH_BITS_USED);
+ /*
+ * Populate scratch with initial values set up at message allocation time.
+ * After, we reinterpret the space in the message as the right type
+ * of trailer for the address space in question.
+ */
+ bcopy(real_trailer_out, &tmp_trailer, MAX_TRAILER_SIZE);
+ trailer = &tmp_trailer;
+#else /* __arm64__ */
+ (void)thread;
+ trailer = (mach_msg_max_trailer_t *)
+ ((vm_offset_t)kmsg->ikm_header +
+ round_msg(kmsg->ikm_header->msgh_size));
+#endif /* __arm64__ */
+
+ if (!(option & MACH_RCV_TRAILER_MASK)) {
+ return trailer->msgh_trailer_size;
}
- printf("\n");
- db_indent -= 2;
- needs_comma = 1;
- if (msgh->msgh_remote_port) {
- iprintf("remote=0x%x(", msgh->msgh_remote_port);
- ipc_print_type_name(MACH_MSGH_BITS_REMOTE(msgh->msgh_bits));
- printf(")");
- } else {
- iprintf("remote=null");
- }
+ trailer->msgh_seqno = seqno;
+ trailer->msgh_context = context;
+ trailer->msgh_trailer_size = REQUESTED_TRAILER_SIZE(thread_is_64bit(thread), option);
- if (msgh->msgh_local_port) {
- printf("%slocal=%p(", needs_comma ? "," : "",
- msgh->msgh_local_port);
- ipc_print_type_name(MACH_MSGH_BITS_LOCAL(msgh->msgh_bits));
- printf(")\n");
- } else {
- printf("local=null\n");
+ if (minimal_trailer) {
+ goto done;
}
- iprintf("msgh_id=%d, size=%d\n",
- msgh->msgh_id,
- msgh->msgh_size);
-
- if (mbits & MACH_MSGH_BITS_COMPLEX) {
- ipc_msg_print_untyped((mach_msg_body_t *) (msgh + 1));
+ if (MACH_RCV_TRAILER_ELEMENTS(option) >=
+ MACH_RCV_TRAILER_ELEMENTS(MACH_RCV_TRAILER_AV)){
+ trailer->msgh_ad = 0;
}
-}
-
-const char *
-mm_copy_options_string(
- mach_msg_copy_options_t option)
-{
- const char *name;
+ /*
+ * The ipc_kmsg_t holds a reference to the label of a label
+ * handle, not the port. We must get a reference to the port
+ * and a send right to copyout to the receiver.
+ */
- switch (option) {
- case MACH_MSG_PHYSICAL_COPY:
- name = "PHYSICAL";
- break;
- case MACH_MSG_VIRTUAL_COPY:
- name = "VIRTUAL";
- break;
- case MACH_MSG_OVERWRITE:
- name = "OVERWRITE";
- break;
- case MACH_MSG_ALLOCATE:
- name = "ALLOCATE";
- break;
- case MACH_MSG_KALLOC_COPY_T:
- name = "KALLOC_COPY_T";
- break;
- default:
- name = "unknown";
- break;
+ if (option & MACH_RCV_TRAILER_ELEMENTS (MACH_RCV_TRAILER_LABELS)) {
+ trailer->msgh_labels.sender = 0;
}
- return name;
-}
-
-void
-ipc_msg_print_untyped(
- mach_msg_body_t *body)
-{
- mach_msg_descriptor_t *saddr, *send;
- mach_msg_descriptor_type_t type;
-
- iprintf("%d descriptors %d: \n", body->msgh_descriptor_count);
-
- saddr = (mach_msg_descriptor_t *) (body + 1);
- send = saddr + body->msgh_descriptor_count;
-
- for ( ; saddr < send; saddr++ ) {
-
- type = saddr->type.type;
- switch (type) {
-
- case MACH_MSG_PORT_DESCRIPTOR: {
- mach_msg_port_descriptor_t *dsc;
+done:
+#ifdef __arm64__
+ ipc_kmsg_munge_trailer(trailer, real_trailer_out, thread_is_64bit(thread));
+#endif /* __arm64__ */
- dsc = &saddr->port;
- iprintf("-- PORT name = 0x%x disp = ", dsc->name);
- ipc_print_type_name(dsc->disposition);
- printf("\n");
- break;
- }
- case MACH_MSG_OOL_VOLATILE_DESCRIPTOR:
- case MACH_MSG_OOL_DESCRIPTOR: {
- mach_msg_ool_descriptor_t *dsc;
-
- dsc = &saddr->out_of_line;
- iprintf("-- OOL%s addr = 0x%x size = 0x%x copy = %s %s\n",
- type == MACH_MSG_OOL_DESCRIPTOR ? "" : " VOLATILE",
- dsc->address, dsc->size,
- mm_copy_options_string(dsc->copy),
- dsc->deallocate ? "DEALLOC" : "");
- break;
- }
- case MACH_MSG_OOL_PORTS_DESCRIPTOR : {
- mach_msg_ool_ports_descriptor_t *dsc;
-
- dsc = &saddr->ool_ports;
-
- iprintf("-- OOL_PORTS addr = 0x%x count = 0x%x ",
- dsc->address, dsc->count);
- printf("disp = ");
- ipc_print_type_name(dsc->disposition);
- printf(" copy = %s %s\n",
- mm_copy_options_string(dsc->copy),
- dsc->deallocate ? "DEALLOC" : "");
- break;
- }
-
- default: {
- iprintf("-- UNKNOWN DESCRIPTOR 0x%x\n", type);
- break;
- }
- }
- }
+ return trailer->msgh_trailer_size;
}
-#endif /* MACH_KDB */
projects / apple / xnu.git / blobdiff