xnu-2422.115.4.tar.gz

[apple/xnu.git] / osfmk / mach / message.h

diff --git a/osfmk/mach/message.h b/osfmk/mach/message.h
index eba414fc1e28d054d3252eb55b5b558718b20989..7c1f161643bee0e4b05cfc2c5e2fd7daaf9e2b9c 100644 (file)
--- a/osfmk/mach/message.h
+++ b/osfmk/mach/message.h
@@ -128,7 +128,9 @@ typedef natural_t mach_msg_timeout_t;
 #define MACH_MSGH_BITS_USER             0x8000ffffU
 
 #define        MACH_MSGH_BITS_CIRCULAR         0x40000000      /* internal use only */
-#define        MACH_MSGH_BITS_USED             0xc000ffffU
+#define        MACH_MSGH_BITS_RAISEIMP         0x20000000      /* importance raise, internal use only */
+#define        MACH_MSGH_BITS_IMPHOLDASRT      0x10000000      /* holds assertion alredy, in userland */
+#define        MACH_MSGH_BITS_USED             0xf000ffffU
 
 #define        MACH_MSGH_BITS_PORTS_MASK                               \
                (MACH_MSGH_BITS_REMOTE_MASK|MACH_MSGH_BITS_LOCAL_MASK)
@@ -371,6 +373,7 @@ typedef     unsigned int mach_msg_trailer_type_t;
 #define        MACH_MSG_TRAILER_FORMAT_0       0
 
 typedef        unsigned int mach_msg_trailer_size_t;
+typedef char *mach_msg_trailer_info_t;
 
 typedef struct 
 {
@@ -464,6 +467,7 @@ typedef struct
  * another module may exceed the local modules notion of
  * MAX_TRAILER_SIZE.
  */
+
 typedef mach_msg_mac_trailer_t mach_msg_max_trailer_t;
 #define MAX_TRAILER_SIZE ((mach_msg_size_t)sizeof(mach_msg_max_trailer_t))
 
@@ -587,18 +591,23 @@ typedef integer_t mach_msg_option_t;
 
 #define        MACH_SEND_MSG           0x00000001
 #define        MACH_RCV_MSG            0x00000002
-#define MACH_RCV_LARGE         0x00000004
 
-#define MACH_SEND_TIMEOUT      0x00000010
-#define MACH_SEND_INTERRUPT    0x00000040      /* libmach implements */
+#define MACH_RCV_LARGE         0x00000004      /* report large message sizes */
+#define MACH_RCV_LARGE_IDENTITY        0x00000008      /* identify source of large messages */
+
+#define MACH_SEND_TIMEOUT      0x00000010      /* timeout value applies to send */
+#define MACH_SEND_INTERRUPT    0x00000040      /* don't restart interrupted sends */
 #define MACH_SEND_NOTIFY       0x00000080      /* arm send-possible notify */
-#define MACH_SEND_ALWAYS       0x00010000      /* internal use only */
-#define MACH_SEND_TRAILER      0x00020000      
+#define MACH_SEND_ALWAYS       0x00010000      /* ignore qlimits - kernel only */
+#define MACH_SEND_TRAILER      0x00020000      /* sender-provided trailer */
+#define MACH_SEND_NOIMPORTANCE  0x00040000      /* msg won't carry importance */
+#define MACH_SEND_IMPORTANCE   0x00080000      /* msg carries importance - kernel only */
 
-#define MACH_RCV_TIMEOUT       0x00000100
+
+#define MACH_RCV_TIMEOUT       0x00000100      /* timeout value applies to receive */  
 #define MACH_RCV_NOTIFY                0x00000200      /* reserved - legacy */
-#define MACH_RCV_INTERRUPT     0x00000400      /* libmach implements */
-#define MACH_RCV_OVERWRITE     0x00001000
+#define MACH_RCV_INTERRUPT     0x00000400      /* don't restart interrupted receive */
+#define MACH_RCV_OVERWRITE     0x00001000      /* scatter receive */
 
 /* 
  * NOTE: a 0x00------ RCV mask implies to ask for
@@ -619,10 +628,41 @@ typedef integer_t mach_msg_option_t;
 
 #define MACH_RCV_TRAILER_TYPE(x)     (((x) & 0xf) << 28) 
 #define MACH_RCV_TRAILER_ELEMENTS(x) (((x) & 0xf) << 24)  
-#define MACH_RCV_TRAILER_MASK       ((0xff << 24))
+#define MACH_RCV_TRAILER_MASK       ((0xf << 24))
 
 #define GET_RCV_ELEMENTS(y) (((y) >> 24) & 0xf)
 
+#ifdef MACH_KERNEL_PRIVATE
+/* The options that the kernel honors when passed from user space */
+#define MACH_SEND_USER          (MACH_SEND_MSG | \
+                                 MACH_SEND_TIMEOUT | MACH_SEND_NOTIFY | \
+                                 MACH_SEND_TRAILER | MACH_SEND_NOIMPORTANCE )
+
+#define MACH_RCV_USER           (MACH_RCV_MSG | \
+                                 MACH_RCV_TIMEOUT | MACH_RCV_OVERWRITE | \
+                                 MACH_RCV_LARGE | MACH_RCV_LARGE_IDENTITY | \
+                                 MACH_RCV_TRAILER_MASK)
+
+#define MACH_MSG_OPTION_USER    (MACH_SEND_USER | MACH_RCV_USER)
+
+/* The options implemented by the library interface to mach_msg et. al. */
+#define MACH_MSG_OPTION_LIB     (MACH_SEND_INTERRUPT | MACH_RCV_INTERRUPT)
+
+/* Default options to use when sending from the kernel */
+#if 11938665
+       /*
+        * Until we are sure of its effects, we are disabling
+        * importance donation from the kernel-side of user
+        * threads in importance-donating tasks.
+        */
+#define MACH_SEND_KERNEL_DEFAULT (MACH_SEND_MSG | \
+                                 MACH_SEND_ALWAYS | MACH_SEND_NOIMPORTANCE)
+#else
+#define MACH_SEND_KERNEL_DEFAULT (MACH_SEND_MSG | MACH_SEND_ALWAYS)
+#endif
+
+#endif /* MACH_KERNEL_PRIVATE */
+
 /* 
  * XXXMAC: note that in the case of MACH_RCV_TRAILER_LABELS, 
  * we just fall through to mach_msg_max_trailer_t.