Cleanup link state change notification:

o add new if_link_state_change routine that deals with link state changes
o change mii to use if_link_state_change

2 files changed, 27 insertions, 0 deletions

diff --git a/sys/net/if.c b/sys/net/if.c
index b21701d..3968345 100644
--- a/sys/net/if.c
+++ b/sys/net/if.c
@@ -955,6 +955,32 @@ if_route(struct ifnet *ifp, int flag, int fam)
 #endif
 }
 
+void	(*vlan_link_state_p)(struct ifnet *, int);	/* XXX: private from if_vlan */
+
+/*
+ * Handle a change in the interface link state.
+ */
+void
+if_link_state_change(struct ifnet *ifp, int link_state)
+{
+	int link;
+
+	/* Notify that the link state has changed. */
+	if (ifp->if_link_state != link_state) {
+		ifp->if_link_state = link_state;
+		rt_ifmsg(ifp);
+		if (link_state == LINK_STATE_UP)
+			link = NOTE_LINKUP;
+		else if (link_state == LINK_STATE_DOWN)
+			link = NOTE_LINKDOWN;
+		else
+			link = NOTE_LINKINV;
+		KNOTE_UNLOCKED(&ifp->if_klist, link);
+		if (ifp->if_nvlans != 0)
+			(*vlan_link_state_p)(ifp, link);
+	}
+}
+
 /*
  * Mark an interface down and notify protocols of
  * the transition.
diff --git a/sys/net/if_var.h b/sys/net/if_var.h
index f3517c6..ebbaa25 100644
--- a/sys/net/if_var.h
+++ b/sys/net/if_var.h
@@ -629,6 +629,7 @@ int	if_delmulti(struct ifnet *, struct sockaddr *);
 void	if_detach(struct ifnet *);
 void	if_down(struct ifnet *);
 void	if_initname(struct ifnet *, const char *, int);
+void	if_link_state_change(struct ifnet *, int);
 int	if_printf(struct ifnet *, const char *, ...) __printflike(2, 3);
 int	if_setlladdr(struct ifnet *, const u_char *, int);
 void	if_up(struct ifnet *);