svn commit: r321747 - stable/11/sys/net

[Sepherosa Ziehau]

Author: sephe
Date: Mon Jul 31 02:33:49 2017
New Revision: 321747
URL: https://svnweb.freebsd.org/changeset/base/321747

Log:
  MFC 321406
  
      ethernet: Add ethernet interface attached event and devctl notification.
  
      ifnet_arrival_event may not be adequate under certain situation; e.g.
      when the LLADDR is needed.  So the ethernet ifattach event is announced
      after all necessary bits are setup.
  
      Sponsored by:   Microsoft
      Differential Revision:  https://reviews.freebsd.org/D11617

Modified:
  stable/11/sys/net/ethernet.h
  stable/11/sys/net/if_ethersubr.c
Directory Properties:
  stable/11/   (props changed)

Modified: stable/11/sys/net/ethernet.h
==============================================================================
--- stable/11/sys/net/ethernet.h	Mon Jul 31 01:36:51 2017	(r321746)
+++ stable/11/sys/net/ethernet.h	Mon Jul 31 02:33:49 2017	(r321747)
@@ -403,6 +403,12 @@ void	ether_vlan_mtap(struct bpf_if *, struct mbuf *,
 	    void *, u_int);
 struct mbuf  *ether_vlanencap(struct mbuf *, uint16_t);
 
+#ifdef _SYS_EVENTHANDLER_H_
+/* new ethernet interface attached event */
+typedef void (*ether_ifattach_event_handler_t)(void *, struct ifnet *);
+EVENTHANDLER_DECLARE(ether_ifattach_event, ether_ifattach_event_handler_t);
+#endif
+
 #else /* _KERNEL */
 
 #include <sys/cdefs.h>

Modified: stable/11/sys/net/if_ethersubr.c
==============================================================================
--- stable/11/sys/net/if_ethersubr.c	Mon Jul 31 01:36:51 2017	(r321746)
+++ stable/11/sys/net/if_ethersubr.c	Mon Jul 31 02:33:49 2017	(r321747)
@@ -38,6 +38,8 @@
 
 #include <sys/param.h>
 #include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/eventhandler.h>
 #include <sys/kernel.h>
 #include <sys/lock.h>
 #include <sys/malloc.h>
@@ -933,6 +935,11 @@ ether_ifattach(struct ifnet *ifp, const u_int8_t *lla)
 		if_printf(ifp, "Ethernet address: %6D\n", lla, ":");
 
 	uuid_ether_add(LLADDR(sdl));
+
+	/* Add necessary bits are setup; announce it now. */
+	EVENTHANDLER_INVOKE(ether_ifattach_event, ifp);
+	if (IS_DEFAULT_VNET(curvnet))
+		devctl_notify("ETHERNET", ifp->if_xname, "IFATTACH", NULL);
 }
 
 /*