xnu-1504.7.4.tar.gz

[apple/xnu.git] / bsd / sys / kpi_mbuf.h

diff --git a/bsd/sys/kpi_mbuf.h b/bsd/sys/kpi_mbuf.h
index e1558fa66ae30f6722328a5303caef7ab7d56f7e..1a706ab309b713ab535b96f658fa275a9b52bebc 100644 (file)
--- a/bsd/sys/kpi_mbuf.h
+++ b/bsd/sys/kpi_mbuf.h
@@ -1330,6 +1330,31 @@ extern void mbuf_tag_free(mbuf_t mbuf, mbuf_tag_id_t module_id,
  */
 extern void mbuf_stats(struct mbuf_stat *stats);
 
+#ifdef KERNEL_PRIVATE
+/*
+       @enum mbuf_priority_t
+       @abstract Priority of a packet.
+       @discussion Some mbufs represent packets containing application data.
+               The priority of the application data is represented by the
+               mbuf priority, as determined by the system.
+       @constant MBUF_PRIORITY_NORMAL Indicates the packet contains
+               normal priority data.
+       @constant MBUF_PRIORITY_BACKGROUND Indicates the packet contains
+               background priority data.
+ */
+typedef enum {
+       MBUF_PRIORITY_NORMAL            = 0,
+       MBUF_PRIORITY_BACKGROUND        = 1
+} mbuf_priority_t;
+
+/*
+       @function mbuf_get_priority
+       @discussion Get the priority value of the packet.
+       @param mbuf The mbuf to obtain the priority value from.
+       @result The priority value of the packet.
+ */
+extern mbuf_priority_t mbuf_get_priority(mbuf_t mbuf);
+#endif /* KERNEL_PRIVATE */
 
 /* IF_QUEUE interaction */