Index: ifq_enqueue.9
===================================================================
RCS file: /cvs/src/share/man/man9/ifq_enqueue.9,v
retrieving revision 1.1
diff -u -p -r1.1 ifq_enqueue.9
--- ifq_enqueue.9	20 Nov 2015 11:15:07 -0000	1.1
+++ ifq_enqueue.9	20 Nov 2015 11:42:08 -0000
@@ -25,7 +25,10 @@
 .Nm ifq_deq_rollback ,
 .Nm ifq_purge ,
 .Nm ifq_len ,
-.Nm ifq_empty
+.Nm ifq_empty ,
+.Nm ifq_set_oactive ,
+.Nm ifq_clr_oactive ,
+.Nm ifq_is_oactive
 .Nd interface send queue API
 .Sh SYNOPSIS
 .In net/if_var.h
@@ -45,6 +48,12 @@
 .Fn ifq_len "struct ifqueue *ifq"
 .Ft unsigned int
 .Fn ifq_empty "struct ifqueue *ifq"
+.Ft void
+.Fn ifq_set_oactive "struct ifqueue *ifq"
+.Ft void
+.Fn ifq_clr_oactive "struct ifqueue *ifq"
+.Ft unsigned int
+.Fn ifq_is_oactive "struct ifqueue *ifq"
 .Sh DESCRIPTION
 The ifqueue API provides implementions of data structures and
 operations for the network stack to queue mbufs for a network driver
@@ -104,6 +113,22 @@ or
 Return if the interface send queue
 .Fa ifq
 is empty.
+.It Fn ifq_set_oactive "struct ifqueue *ifq"
+.Fn ifq_set_oactive
+is called by the relevant driver to mark the hardware associated
+with the interface send queue
+.Fa ifq
+as unable to transmit more packets.
+.It Fn ifq_clr_oactive "struct ifqueue *ifq"
+.Fn ifq_clr_oactive
+is called by the relevant driver to clear the "active" mark on the
+hardware associated with the interface send queue
+.Fa ifq ,
+meaning it is now able to transmit packets.
+.It Fn ifq_is_oactive "struct ifqueue *ifq"
+Return if the hardware associated with the interface send queue
+.Fa ifq
+is unable to transmit more packets.
 .El
 .Sh CONTEXT
 .Fn ifq_enqueue ,
@@ -113,8 +138,11 @@ is empty.
 .Fn ifq_deq_rollback ,
 .Fn ifq_purge ,
 .Fn ifq_len ,
+.Fn ifq_empty ,
+.Fn ifq_set_oactive ,
+.Fn ifq_clr_oactive ,
 and
-.Fn ifq_empty
+.Fn ifq_is_oactive
 can be called during autoconf, from process context, or from interrupt context.
 .Sh RETURN VALUES
 .Fn ifq_enqueue
@@ -136,5 +164,9 @@ returns the number of mbufs on the queue
 .Pp
 .Fn ifq_empty
 returns a non-zero value if the queue is empty, otherwise 0.
+.Pp
+.Fn ifq_is_oactive
+returns a non-zero value if the hardware associated with the interface
+send queue is unable to transmit more packets, otherwise 0.
 .Sh SEE ALSO
 .Xr m_freem 9