* Operations on kernel messages.
*/
-#include <norma_vm.h>
#include <mach/mach_types.h>
#include <mach/boolean.h>
#include <ipc/ipc_right.h>
#include <ipc/ipc_hash.h>
#include <ipc/ipc_table.h>
+#include <ipc/ipc_importance.h>
#include <security/mac_mach_internal.h>
#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
* 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);
- if (msg_and_trailer_size >= MACH_MSG_SIZE_MAX - max_desc)
+
+ /* 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) {
assert(i <= IKM_STASH);
kmsg = cache->entries[--i];
cache->avail = i;
- ikm_check_init(kmsg, max_expanded_size);
enable_preemption();
- kmsg->ikm_header = (mach_msg_header_t *)
- ((vm_offset_t)(kmsg + 1) +
- max_expanded_size -
- msg_and_trailer_size);
+ ikm_check_init(kmsg, max_expanded_size);
+ ikm_set_header(kmsg, msg_and_trailer_size);
return (kmsg);
}
enable_preemption();
if (kmsg != IKM_NULL) {
ikm_init(kmsg, max_expanded_size);
- kmsg->ikm_header = (mach_msg_header_t *)
- ((vm_offset_t)(kmsg + 1) +
- max_expanded_size -
- msg_and_trailer_size);
+ ikm_set_header(kmsg, msg_and_trailer_size);
}
return(kmsg);
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_destroy(
ipc_kmsg_t kmsg)
{
- ipc_kmsg_queue_t queue;
- boolean_t empty;
-
/*
- * ipc_kmsg_clean can cause more messages to be destroyed.
- * Curtail recursion by queueing messages. If a message
- * is already queued, then this is a recursive call.
+ * Destroying a message can cause more messages to be destroyed.
+ * Curtail recursion by putting messages on the deferred
+ * destruction queue. If this was the first message on the
+ * queue, this instance must process the full queue.
*/
+ if (ipc_kmsg_delayed_destroy(kmsg))
+ ipc_kmsg_reap_delayed();
+}
- queue = &(current_thread()->ith_messages);
- empty = ipc_kmsg_queue_empty(queue);
- ipc_kmsg_enqueue(queue, kmsg);
+/*
+ * Routine: ipc_kmsg_delayed_destroy
+ * Purpose:
+ * Enqueues a kernel message for deferred destruction.
+ * Returns:
+ * Boolean indicator that the caller is responsible to reap
+ * deferred messages.
+ */
- if (empty) {
- /* must leave kmsg in queue while cleaning it */
+boolean_t ipc_kmsg_delayed_destroy(
+ ipc_kmsg_t kmsg)
+{
+ ipc_kmsg_queue_t queue = &(current_thread()->ith_messages);
+ boolean_t first = ipc_kmsg_queue_empty(queue);
- while ((kmsg = ipc_kmsg_queue_first(queue)) != IKM_NULL) {
- ipc_kmsg_clean(kmsg);
- ipc_kmsg_rmqueue(queue, kmsg);
- ipc_kmsg_free(kmsg);
- }
- }
+ ipc_kmsg_enqueue(queue, kmsg);
+ return first;
}
/*
- * Routine: ipc_kmsg_destroy_dest
+ * Routine: ipc_kmsg_destroy_queue
* Purpose:
- * Destroys a kernel message. Releases all rights,
- * references, and memory held by the message (including
- * the destination port reference.
- * Frees the message.
+ * Destroys messages from the per-thread
+ * deferred reaping queue.
* Conditions:
* No locks held.
*/
+
void
-ipc_kmsg_destroy_dest(
- ipc_kmsg_t kmsg)
+ipc_kmsg_reap_delayed(void)
{
- ipc_port_t port;
-
- port = kmsg->ikm_header->msgh_remote_port;
+ ipc_kmsg_queue_t queue = &(current_thread()->ith_messages);
+ ipc_kmsg_t kmsg;
- ipc_port_release(port);
- kmsg->ikm_header->msgh_remote_port = MACH_PORT_NULL;
- ipc_kmsg_destroy(kmsg);
+ /*
+ * must leave kmsg in queue while cleaning it to assure
+ * no nested calls recurse into here.
+ */
+ while ((kmsg = ipc_kmsg_queue_first(queue)) != IKM_NULL) {
+ ipc_kmsg_clean(kmsg);
+ ipc_kmsg_rmqueue(queue, kmsg);
+ ipc_kmsg_free(kmsg);
+ }
}
/*
* Conditions:
* No locks held.
*/
-
+static unsigned int _ipc_kmsg_clean_invalid_desc = 0;
void
ipc_kmsg_clean_body(
__unused ipc_kmsg_t kmsg,
break;
}
default : {
- printf("cleanup: don't understand this type of descriptor\n");
+ _ipc_kmsg_clean_invalid_desc++; /* don't understand this type of descriptor */
}
}
}
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(object, MACH_MSGH_BITS_REMOTE(mbits));
+ ipc_object_destroy_dest(object, MACH_MSGH_BITS_REMOTE(mbits));
object = (ipc_object_t) kmsg->ikm_header->msgh_local_port;
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))
- ipc_object_destroy(object, MACH_MSGH_BITS_REMOTE(mbits));
+ ipc_object_destroy_dest(object, MACH_MSGH_BITS_REMOTE(mbits));
object = (ipc_object_t) kmsg->ikm_header->msgh_local_port;
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
}
/*
IP_CLEAR_PREALLOC(port, kmsg);
}
+/*
+ * Routine: ipc_kmsg_prealloc
+ * Purpose:
+ * Wraper to ipc_kmsg_alloc() to account for
+ * header expansion requirements.
+ */
+ipc_kmsg_t
+ipc_kmsg_prealloc(mach_msg_size_t size)
+{
+#if defined(__LP64__)
+ if (size > MACH_MSG_SIZE_MAX - LEGACY_HEADER_SIZE_DELTA)
+ return IKM_NULL;
+
+ size += LEGACY_HEADER_SIZE_DELTA;
+#endif
+ return ipc_kmsg_alloc(size);
+}
/*
* 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 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);
- assert(IP_VALID((ipc_port_t) msg->msgh_remote_port));
dest_port = (ipc_port_t)msg->msgh_remote_port;
msg_and_trailer_size = size + MAX_TRAILER_SIZE;
* clients. These are set up for those kernel clients
* which cannot afford to wait.
*/
-#ifndef __LP64__
- /* LP64todo - does the prealloc kmsg need ikm_header padding?
- */
- if (IP_PREALLOC(dest_port)) {
+ if (IP_VALID(dest_port) && IP_PREALLOC(dest_port)) {
+ mach_msg_size_t max_desc = 0;
+
ip_lock(dest_port);
if (!ip_active(dest_port)) {
ip_unlock(dest_port);
}
assert(IP_PREALLOC(dest_port));
kmsg = dest_port->ip_premsg;
- if (msg_and_trailer_size > kmsg->ikm_size) {
- ip_unlock(dest_port);
- return MACH_SEND_TOO_LARGE;
- }
if (ikm_prealloc_inuse(kmsg)) {
ip_unlock(dest_port);
return MACH_SEND_NO_BUFFER;
}
+#if !defined(__LP64__)
+ if (msg->msgh_bits & MACH_MSGH_BITS_COMPLEX) {
+ assert(size > sizeof(mach_msg_base_t));
+ max_desc = ((mach_msg_base_t *)msg)->body.msgh_descriptor_count *
+ DESC_SIZE_ADJUSTMENT;
+ }
+#endif
+ if (msg_and_trailer_size > kmsg->ikm_size - max_desc) {
+ ip_unlock(dest_port);
+ return MACH_SEND_TOO_LARGE;
+ }
ikm_prealloc_set_inuse(kmsg, dest_port);
+ ikm_set_header(kmsg, msg_and_trailer_size);
ip_unlock(dest_port);
}
else
-#endif /* !__LP64__ */
{
kmsg = ipc_kmsg_alloc(msg_and_trailer_size);
if (kmsg == IKM_NULL)
trailer->msgh_labels.sender = 0;
-#if CONFIG_MACF_MACH
- kmsg->ikm_sender = NULL;
-#endif
*kmsgp = kmsg;
return MACH_MSG_SUCCESS;
}
* MACH_MSG_SUCCESS The message was accepted.
* MACH_SEND_TIMED_OUT Caller still has message.
* 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;
+ boolean_t kernel_reply = FALSE;
spl_t s;
- port = (ipc_port_t) kmsg->ikm_header->msgh_remote_port;
- assert(IP_VALID(port));
+ /* 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 ((option & ~(MACH_SEND_TIMEOUT|MACH_SEND_ALWAYS)) != 0)
- printf("ipc_kmsg_send: bad option 0x%x\n", option);
+#if IMPORTANCE_INHERITANCE
+ boolean_t did_importance = FALSE;
+#if IMPORTANCE_DEBUG
+ mach_msg_id_t imp_msgh_id = -1;
+ int sender_pid = -1;
+#endif /* IMPORTANCE_DEBUG */
+#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);
+ return MACH_MSG_SUCCESS;
+ }
+
+ 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);
+ ip_release(port); /* JMM - Future: release right, not just ref */
+ kmsg->ikm_header->msgh_remote_port = MACH_PORT_NULL;
+ ipc_kmsg_destroy(kmsg);
+ return MACH_MSG_SUCCESS;
+ }
+
if (port->ip_receiver == ipc_space_kernel) {
/*
assert(IP_VALID(port));
ip_lock(port);
/* fall thru with reply - same options */
+ kernel_reply = TRUE;
}
+#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)) {
- /*
- * 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.
- */
-
- ip_release(port);
- ip_check_unlock(port);
- kmsg->ikm_header->msgh_remote_port = MACH_PORT_NULL;
- ipc_kmsg_destroy(kmsg);
- return MACH_MSG_SUCCESS;
- }
-
- if (kmsg->ikm_header->msgh_bits & MACH_MSGH_BITS_CIRCULAR) {
- ip_unlock(port);
-
- /* don't allow the creation of a circular loop */
-
- ipc_kmsg_destroy(kmsg);
- return MACH_MSG_SUCCESS;
+ if (did_importance == FALSE) {
+ did_importance = TRUE;
+ if (ipc_importance_send(kmsg, option))
+ goto retry;
}
+#endif /* IMPORTANCE_INHERITANCE */
/*
* We have a valid message and a valid reference on the port.
s = splsched();
imq_lock(&port->ip_messages);
ip_unlock(port);
+
error = ipc_mqueue_send(&port->ip_messages, kmsg, option,
send_timeout, s);
+#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;
+
+ case MACH_MSG_SUCCESS:
+ default:
+ break;
+ }
+#if IMPORTANCE_DEBUG
+ 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_DEBUG */
+ }
+#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) {
+ ip_release(port); /* JMM - Future: release right, not just ref */
+ kmsg->ikm_header->msgh_remote_port = MACH_PORT_NULL;
+ ipc_kmsg_destroy(kmsg);
+ 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.
+ */
+ ip_release(port); /* JMM - Future: release right, not just ref */
kmsg->ikm_header->msgh_remote_port = MACH_PORT_NULL;
ipc_kmsg_destroy(kmsg);
return MACH_MSG_SUCCESS;
" 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);
}
+ __unreachable_ok_pop
if (copyoutmsg((const char *) kmsg->ikm_header, msg_addr, size))
mr = MACH_RCV_INVALID_DATA;
else
* and the bits field is updated. The destination port
* will be a valid port pointer.
*
- * The notify argument implements the MACH_SEND_CANCEL option.
- * If it is not MACH_PORT_NULL, it should name a receive right.
- * If the processing of the destination port would generate
- * a port-deleted notification (because the right for the
- * destination port is destroyed and it had a request for
- * a dead-name notification registered), and the port-deleted
- * notification would be sent to the named receive right,
- * then it isn't sent and the send-once right for the notify
- * port is quietly destroyed.
- *
* Conditions:
* Nothing locked.
* Returns:
* MACH_SEND_INVALID_HEADER
* Illegal value in the message header bits.
* MACH_SEND_INVALID_DEST The space is dead.
- * MACH_SEND_INVALID_NOTIFY
- * Notify is non-null and doesn't name a receive right.
- * (Either KERN_INVALID_NAME or KERN_INVALID_RIGHT.)
* MACH_SEND_INVALID_DEST Can't copyin destination port.
* (Either KERN_INVALID_NAME or KERN_INVALID_RIGHT.)
* MACH_SEND_INVALID_REPLY Can't copyin reply port.
mach_msg_return_t
ipc_kmsg_copyin_header(
- mach_msg_header_t *msg,
+ ipc_kmsg_t kmsg,
ipc_space_t space,
- mach_port_name_t notify)
+ 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_port_t notify_port;
- ipc_entry_t 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.
*/
- entry = ipc_entry_lookup(space, dest_name);
- if (entry != IE_NULL) {
- int error = 0;
- ipc_port_t port = (ipc_port_t) 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 (voucher_type != MACH_MSGH_BITS_ZERO) {
+
+ voucher_name = msg->msgh_voucher_port;
- if (notify != MACH_PORT_NULL) {
- if ((entry = ipc_entry_lookup(space, notify)) == IE_NULL) {
+ 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_NOTIFY;
+ return MACH_SEND_INVALID_VOUCHER;
}
- if((entry->ie_bits & MACH_PORT_TYPE_RECEIVE) == 0) {
- is_write_unlock(space);
- return MACH_SEND_INVALID_NOTIFY;
+
+ 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;
}
+ }
- notify_port = (ipc_port_t) entry->ie_object;
- } else
- notify_port = IP_NULL;
+ /*
+ * Handle combinations of validating destination and reply; along
+ * with copying in destination, reply, and voucher in an atomic way.
+ */
- if (dest_name == reply_name) {
- mach_port_name_t name = dest_name;
+ if (dest_name == voucher_name) {
/*
- * 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.
+ * 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).
*/
-
- entry = ipc_entry_lookup(space, name);
- if (entry == IE_NULL)
+ dest_entry = voucher_entry;
+ if (dest_entry == IE_NULL) {
goto invalid_dest;
+ }
- assert(reply_type != 0); /* because name not null */
-
- if (!ipc_right_copyin_check(space, name, entry, reply_type))
- goto invalid_reply;
+ /*
+ * 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 */
- 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.
- */
+ /* 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;
+ }
+ }
+ /*
+ * 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;
- } 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, 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.
- */
-
- assert(IO_VALID(dest_port));
- assert(entry->ie_bits & MACH_PORT_TYPE_RECEIVE);
- assert(dest_soright == IP_NULL);
+ }
+ voucher_port = (ipc_port_t)dest_port;
- kr = ipc_right_copyin(space, name, entry,
+ /*
+ * 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);
-
+ &reply_port, &reply_soright,
+ &release_port, &assertcnt);
+ assert(assertcnt == 0);
assert(kr == KERN_SUCCESS);
- assert(reply_port == dest_port);
- assert(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, entry,
- dest_type, FALSE,
- &dest_port, &dest_soright);
- if (kr != KERN_SUCCESS)
- goto invalid_dest;
-
- assert(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, 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(entry->ie_bits) == MACH_PORT_TYPE_NONE)
- ipc_entry_dealloc(space, name, entry);
-
+ }
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, 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(entry->ie_bits) == MACH_PORT_TYPE_NONE)
- ipc_entry_dealloc(space, name, entry);
+ 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.
- */
-
- entry = ipc_entry_lookup(space, dest_name);
- if (entry == IE_NULL)
- goto invalid_dest;
-
- kr = ipc_right_copyin(space, dest_name, 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(entry->ie_bits) == MACH_PORT_TYPE_NONE)
- ipc_entry_dealloc(space, dest_name, entry);
-
- reply_port = (ipc_object_t)CAST_MACH_NAME_TO_PORT(reply_name);
- reply_soright = IP_NULL;
- } else {
- ipc_entry_t dest_entry, reply_entry;
/*
- * 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!
+ * 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 */
-
- if (IE_BITS_TYPE(reply_entry->ie_bits) == MACH_PORT_TYPE_NONE)
- ipc_entry_dealloc(space, reply_name, reply_entry);
-
- if (IE_BITS_TYPE(dest_entry->ie_bits) == MACH_PORT_TYPE_NONE)
- ipc_entry_dealloc(space, dest_name, dest_entry);
+ /* the entry(s) might need to be deallocated */
+ assert(IE_NULL != dest_entry);
+ 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 != reply_entry && 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 (dest_entry != voucher_entry && 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;
}
/*
- * At this point, dest_port, reply_port,
- * dest_soright, reply_soright are all initialized.
- * Any defunct entries have been deallocated.
- * The space is still write-locked, and we need to
- * make the MACH_SEND_CANCEL check. The notify_port pointer
- * is still usable, because the copyin code above won't ever
- * deallocate a receive right, so its entry still exists
- * and holds a ref. Note notify_port might even equal
- * dest_port or reply_port.
+ * No room to store voucher port in in-kernel msg header,
+ * so we store it back in the kmsg itself.
*/
-
- if ((notify != MACH_PORT_NULL) &&
- (dest_soright == notify_port)) {
- ipc_port_release_sonce(dest_soright);
- dest_soright = IP_NULL;
+ if (IP_VALID(voucher_port)) {
+ assert(ip_active(voucher_port));
+ kmsg->ikm_voucher = voucher_port;
+ voucher_type = MACH_MSG_TYPE_MOVE_SEND;
}
- is_write_unlock(space);
-
- 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);
-
dest_type = ipc_object_copyin_type(dest_type);
reply_type = ipc_object_copyin_type(reply_type);
- msg->msgh_bits = (MACH_MSGH_BITS_OTHER(mbits) |
- MACH_MSGH_BITS(dest_type, reply_type));
- msg->msgh_remote_port = (ipc_port_t)dest_port;
- msg->msgh_local_port = (ipc_port_t)reply_port;
-
- return MACH_MSG_SUCCESS;
+ /*
+ * 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. We assure
+ * we won't miss by forcing MACH_SEND_ALWAYS if we got past arming.
+ */
+ 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) {
+ if (ip_full(dport)) {
+#if IMPORTANCE_INHERITANCE
+ needboost = ipc_port_request_sparm(dport, dest_name,
+ dest_entry->ie_request,
+ (*optionp & MACH_SEND_NOIMPORTANCE));
+ if (needboost == FALSE)
+ ip_unlock(dport);
+#else
+ ipc_port_request_sparm(dport, dest_name, dest_entry->ie_request);
+ ip_unlock(dport);
+#endif /* IMPORTANCE_INHERITANCE */
+ } else {
+ *optionp |= MACH_SEND_ALWAYS;
+ ip_unlock(dport);
+ }
+ } else {
+ ip_unlock(dport);
+ }
+ }
+
+ is_write_unlock(space);
+
+#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;
+
+ /* 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);
+ }
+ 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;
+
+ 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;
}
*/
daddr = NULL;
for (i = 0; i < dsc_count; i++) {
+ mach_msg_size_t size;
+
daddr = naddr;
/* make sure the descriptor fits in the 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) ?
* Out-of-line memory descriptor, accumulate kernel
* memory requirements
*/
+ if (space_needed + round_page(size) <= space_needed) {
+ /* Overflow dectected */
+ ipc_kmsg_clean_partial(kmsg, 0, NULL, 0, 0);
+ mr = MACH_MSG_VM_KERNEL;
+ goto out;
+ }
+
space_needed += round_page(size);
if (space_needed > ipc_kmsg_max_vm_space) {
*/
if (space_needed) {
if (vm_allocate(ipc_kernel_copy_map, &paddr, space_needed,
- VM_FLAGS_ANYWHERE) != KERN_SUCCESS) {
+ VM_FLAGS_ANYWHERE | VM_MAKE_TAG(VM_KERN_MEMORY_IPC)) != KERN_SUCCESS) {
ipc_kmsg_clean_partial(kmsg, 0, NULL, 0, 0);
mr = MACH_MSG_VM_KERNEL;
goto out;
/* 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;
}
* MACH_MSG_SUCCESS Successful copyin.
* MACH_SEND_INVALID_HEADER
* Illegal value in the message header bits.
- * MACH_SEND_INVALID_NOTIFY Bad notify port.
* MACH_SEND_INVALID_DEST Can't copyin destination port.
* MACH_SEND_INVALID_REPLY Can't copyin reply port.
* MACH_SEND_INVALID_MEMORY Can't grab out-of-line memory.
ipc_kmsg_t kmsg,
ipc_space_t space,
vm_map_t map,
- mach_port_name_t notify)
+ 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, 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.
*/
-void
+mach_msg_return_t
ipc_kmsg_copyin_from_kernel(
ipc_kmsg_t kmsg)
{
ipc_object_t local = (ipc_object_t) kmsg->ikm_header->msgh_local_port;
/* translate the destination and reply ports */
+ if (!IO_VALID(remote))
+ return MACH_SEND_INVALID_DEST;
ipc_object_copyin_from_kernel(remote, rname);
if (IO_VALID(local))
kmsg->ikm_header->msgh_bits = bits;
if ((bits & MACH_MSGH_BITS_COMPLEX) == 0)
- return;
+ return MACH_MSG_SUCCESS;
}
{
mach_msg_descriptor_t *saddr;
}
}
}
+ return MACH_MSG_SUCCESS;
}
#if IKM_SUPPORT_LEGACY
-void
+mach_msg_return_t
ipc_kmsg_copyin_from_kernel_legacy(
ipc_kmsg_t kmsg)
{
ipc_object_t local = (ipc_object_t) kmsg->ikm_header->msgh_local_port;
/* translate the destination and reply ports */
+ if (!IO_VALID(remote))
+ return MACH_SEND_INVALID_DEST;
ipc_object_copyin_from_kernel(remote, rname);
if (IO_VALID(local))
kmsg->ikm_header->msgh_bits = bits;
if ((bits & MACH_MSGH_BITS_COMPLEX) == 0)
- return;
+ return MACH_MSG_SUCCESS;
}
{
mach_msg_legacy_descriptor_t *saddr;
}
}
}
+ return MACH_MSG_SUCCESS;
}
#endif /* IKM_SUPPORT_LEGACY */
* If it does succeed the remote/local port fields
* contain port names instead of object pointers,
* and the bits field is updated.
- *
- * The notify argument implements the MACH_RCV_NOTIFY option.
- * If it is not MACH_PORT_NULL, it should name a receive right.
- * If the process of receiving the reply port creates a
- * new right in the receiving task, then the new right is
- * automatically registered for a dead-name notification,
- * with the notify port supplying the send-once right.
* Conditions:
* Nothing locked.
* Returns:
mach_msg_return_t
ipc_kmsg_copyout_header(
- mach_msg_header_t *msg,
+ ipc_kmsg_t kmsg,
ipc_space_t space,
- mach_port_name_t notify)
+ 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;
assert(IP_VALID(dest));
+ /*
+ * While we still hold a reference on the received-from port,
+ * process all send-possible notfications we received along with
+ * the message.
+ */
+ ipc_port_spnotify(dest);
+
{
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_port_t notify_port;
- 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);
- /*
- * Handling notify (for MACH_RCV_NOTIFY) is tricky.
- * The problem is atomically making a send-once right
- * from the notify port and installing it for a
- * dead-name request in the new entry, because this
- * requires two port locks (on the notify port and
- * the reply port). However, we can safely make
- * and consume send-once rights for the notify port
- * as long as we hold the space locked. This isn't
- * an atomicity problem, because the only way
- * to detect that a send-once right has been created
- * and then consumed if it wasn't needed is by getting
- * at the receive right to look at ip_sorights, and
- * because the space is write-locked status calls can't
- * lookup the notify port receive right. When we make
- * the send-once right, we lock the notify port,
- * so any status calls in progress will be done.
- */
+ if ((option & MACH_RCV_VOUCHER) != 0)
+ entries_held++;
+ need_write_lock = TRUE;
+ }
- is_write_lock(space);
+ if (need_write_lock) {
- for (;;) {
- ipc_port_request_index_t request;
+ is_write_lock(space);
- if (!space->is_active) {
+ while(entries_held) {
+ if (!is_active(space)) {
is_write_unlock(space);
return (MACH_RCV_HEADER_ERROR|
MACH_MSG_IPC_SPACE);
}
-
- if (notify != MACH_PORT_NULL) {
- notify_port = ipc_port_lookup_notify(space,
- notify);
- if (notify_port == IP_NULL) {
- printf("ipc_kmsg_copyout_header: no notify port\n");
- is_write_unlock(space);
- return MACH_RCV_INVALID_NOTIFY;
- }
- } else
- notify_port = IP_NULL;
-
- if ((reply_type != MACH_MSG_TYPE_PORT_SEND_ONCE) &&
- ipc_right_reverse(space, (ipc_object_t) reply,
- &reply_name, &entry)) {
- /* reply port is locked and active */
-
- /*
- * We don't need the notify_port
- * send-once right, but we can't release
- * it here because reply port is locked.
- * Wait until after the copyout to
- * release the notify port right.
- */
-
- assert(entry->ie_bits &
- MACH_PORT_TYPE_SEND_RECEIVE);
+
+ kr = ipc_entries_hold(space, entries_held);
+ if (KERN_SUCCESS == kr)
break;
- }
-
- ip_lock(reply);
- if (!ip_active(reply)) {
- ip_release(reply);
- ip_check_unlock(reply);
- if (notify_port != IP_NULL)
- ipc_port_release_sonce(notify_port);
-
- ip_lock(dest);
- is_write_unlock(space);
+ 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 */
+ }
- reply = IP_DEAD;
- reply_name = MACH_PORT_DEAD;
- goto copyout_dest;
- }
+ /* Handle reply port. */
+ if (IP_VALID(reply)) {
+ ipc_entry_t entry;
- reply_name = CAST_MACH_PORT_TO_NAME(reply);
- kr = ipc_entry_get(space, &reply_name, &entry);
- if (kr != KERN_SUCCESS) {
- ip_unlock(reply);
-
- if (notify_port != IP_NULL)
- ipc_port_release_sonce(notify_port);
-
- /* space is locked */
- kr = ipc_entry_grow_table(space,
- ITS_SIZE_NONE);
- if (kr != KERN_SUCCESS) {
- /* space is unlocked */
-
- if (kr == KERN_RESOURCE_SHORTAGE) {
- printf("ipc_kmsg_copyout_header: can't grow kernel ipc space\n");
- return (MACH_RCV_HEADER_ERROR|
- MACH_MSG_IPC_KERNEL);
- } else {
- printf("ipc_kmsg_copyout_header: can't grow user ipc space\n");
- return (MACH_RCV_HEADER_ERROR|
- MACH_MSG_IPC_SPACE);
- }
+ /* 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)) {
+ /* reply port is locked and active */
+ 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;
}
- /* space is locked again; start over */
-
- continue;
- }
- assert(IE_BITS_TYPE(entry->ie_bits) ==
- MACH_PORT_TYPE_NONE);
- assert(entry->ie_object == IO_NULL);
-
- if (notify_port == IP_NULL) {
- /* not making a dead-name request */
-
+
+ /* 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;
- break;
}
- kr = ipc_port_dnrequest(reply, reply_name,
- notify_port, &request);
- if (kr != KERN_SUCCESS) {
- ip_unlock(reply);
+ /* space and reply port are locked and active */
+ ip_reference(reply); /* hold onto the reply port */
- ipc_port_release_sonce(notify_port);
+ 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);
- ipc_entry_dealloc(space, reply_name, entry);
- is_write_unlock(space);
+ done_with_reply:
- ip_lock(reply);
- if (!ip_active(reply)) {
- /* will fail next time around loop */
+ /* Handle voucher port. */
+ if (voucher_type != MACH_MSGH_BITS_ZERO) {
+ assert(voucher_type == MACH_MSG_TYPE_MOVE_SEND);
- ip_unlock(reply);
- is_write_lock(space);
- continue;
+ if (!IP_VALID(voucher)) {
+ if ((option & MACH_RCV_VOUCHER) == 0) {
+ voucher_type = MACH_MSGH_BITS_ZERO;
}
-
- kr = ipc_port_dngrow(reply, ITS_SIZE_NONE);
- /* port is unlocked */
- if (kr != KERN_SUCCESS) {
- printf("ipc_kmsg_copyout_header: can't grow kernel ipc space2\n");
- return (MACH_RCV_HEADER_ERROR|
- MACH_MSG_IPC_KERNEL);
+ voucher_name = MACH_PORT_NULL;
+ goto done_with_voucher;
+ }
+
+ /* 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);
}
-
- is_write_lock(space);
- continue;
+ /* 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;
}
-
- notify_port = IP_NULL; /* don't release right below */
-
- entry->ie_object = (ipc_object_t) reply;
- entry->ie_request = request;
- break;
+ } 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);
-
- if (notify_port != IP_NULL)
- ipc_port_release_sonce(notify_port);
+ 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 checking notify and when locking
- * the destination (to ensure atomicity).
+ * 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;
}
- if (notify != MACH_PORT_NULL) {
- ipc_entry_t entry;
-
- /* must check notify even though it won't be used */
-
- if ((entry = ipc_entry_lookup(space, notify)) == IE_NULL) {
- printf("ipc_kmsg_copyout_header: ipc_entry_lookup failed\n");
- is_read_unlock(space);
- return MACH_RCV_INVALID_NOTIFY;
- }
-
- if ((entry->ie_bits & MACH_PORT_TYPE_RECEIVE) == 0) {
- printf("ipc_kmsg_copyout_header: MACH_PORT_TYPE_RECEIVE not set!\n");
- is_read_unlock(space);
- return MACH_RCV_INVALID_NOTIFY;
- }
- }
-
ip_lock(dest);
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;
}
/*
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;
mach_msg_descriptor_type_t dsc_type;
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, (vm_map_size_t)size) == FALSE)
+ panic("Inconsistent OOL/copyout size on %p: expected %d, got %lld @%p",
+ dsc, size, (unsigned long long)copy->size, copy);
+ kr = vm_map_copyout(map, &rcv_addr, copy);
if (kr != KERN_SUCCESS) {
if (kr == KERN_RESOURCE_SHORTAGE)
*mr |= MACH_MSG_VM_KERNEL;
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;
+ int anywhere = VM_FLAGS_ANYWHERE;
+ if (vm_kernel_map_is_kernel(map)) anywhere |= VM_MAKE_TAG(VM_KERN_MEMORY_IPC);
+ else anywhere |= VM_MAKE_TAG(VM_MEMORY_MACH_MSG);
kern_return_t kr;
if ((kr = mach_vm_allocate(map, &rcv_addr,
* Nothing locked.
* Returns:
* MACH_MSG_SUCCESS Copied out all rights and memory.
- * MACH_RCV_INVALID_NOTIFY Bad notify port.
- * Rights and memory in the message are intact.
* MACH_RCV_HEADER_ERROR + special bits
* Rights and memory in the message are intact.
* MACH_RCV_BODY_ERROR + special bits
ipc_kmsg_t kmsg,
ipc_space_t space,
vm_map_t map,
- mach_port_name_t notify,
- 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, notify);
+ 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;
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>
-/*
- * Forward declarations
- */
-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)
-{
- const char *name = ipc_type_name(type_name, TRUE);
- if (name) {
- printf("%s", name);
- } else {
- printf("type%d", type_name);
- }
-}
-
-/*
- * ipc_kmsg_print [ debug ]
- */
-void
-ipc_kmsg_print(
- ipc_kmsg_t kmsg)
-{
- 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_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)
{
- 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));
+ (void)thread;
+ trailer = (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);
+ 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;
}
-}
+ /*
+ * 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.
+ */
-const char *
-mm_copy_options_string(
- mach_msg_copy_options_t option)
-{
- const char *name;
-
- 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;
- 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;
+done:
- 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