svn commit: r202588 - in head/sys: net netgraph
Andrew Thompson
thompsa at FreeBSD.org
Mon Jan 18 20:34:01 UTC 2010
Author: thompsa
Date: Mon Jan 18 20:34:00 2010
New Revision: 202588
URL: http://svn.freebsd.org/changeset/base/202588
Log:
Declare a new EVENTHANDLER called iflladdr_event which signals that the L2
address on an interface has changed. This lets stacked interfaces such as
vlan(4) detect that their lower interface has changed and adjust things in
order to keep working. Previously this situation broke at least vlan(4) and
lagg(4) configurations.
The EVENTHANDLER_INVOKE call was not placed within if_setlladdr() due to the
risk of a loop.
PR: kern/142927
Submitted by: Nikolay Denev
Modified:
head/sys/net/if.c
head/sys/net/if_bridge.c
head/sys/net/if_lagg.c
head/sys/net/if_var.h
head/sys/net/if_vlan.c
head/sys/netgraph/ng_eiface.c
head/sys/netgraph/ng_ether.c
head/sys/netgraph/ng_fec.c
Modified: head/sys/net/if.c
==============================================================================
--- head/sys/net/if.c Mon Jan 18 20:25:29 2010 (r202587)
+++ head/sys/net/if.c Mon Jan 18 20:34:00 2010 (r202588)
@@ -2268,6 +2268,7 @@ ifhwioctl(u_long cmd, struct ifnet *ifp,
return (error);
error = if_setlladdr(ifp,
ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len);
+ EVENTHANDLER_INVOKE(iflladdr_event, ifp);
break;
case SIOCAIFGROUP:
Modified: head/sys/net/if_bridge.c
==============================================================================
--- head/sys/net/if_bridge.c Mon Jan 18 20:25:29 2010 (r202587)
+++ head/sys/net/if_bridge.c Mon Jan 18 20:34:00 2010 (r202588)
@@ -917,6 +917,7 @@ bridge_delete_member(struct bridge_softc
IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN);
sc->sc_ifaddr = fif;
}
+ EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp);
}
bridge_mutecaps(sc); /* recalcuate now this interface is removed */
@@ -1033,6 +1034,7 @@ bridge_ioctl_add(struct bridge_softc *sc
!memcmp(IF_LLADDR(sc->sc_ifp), sc->sc_defaddr, ETHER_ADDR_LEN)) {
bcopy(IF_LLADDR(ifs), IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN);
sc->sc_ifaddr = ifs;
+ EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp);
}
ifs->if_bridge = sc;
Modified: head/sys/net/if_lagg.c
==============================================================================
--- head/sys/net/if_lagg.c Mon Jan 18 20:25:29 2010 (r202587)
+++ head/sys/net/if_lagg.c Mon Jan 18 20:34:00 2010 (r202588)
@@ -305,6 +305,7 @@ lagg_lladdr(struct lagg_softc *sc, uint8
/* Let the protocol know the MAC has changed */
if (sc->sc_lladdr != NULL)
(*sc->sc_lladdr)(sc);
+ EVENTHANDLER_INVOKE(iflladdr_event, ifp);
}
static void
Modified: head/sys/net/if_var.h
==============================================================================
--- head/sys/net/if_var.h Mon Jan 18 20:25:29 2010 (r202587)
+++ head/sys/net/if_var.h Mon Jan 18 20:34:00 2010 (r202588)
@@ -339,6 +339,9 @@ void if_maddr_runlock(struct ifnet *ifp)
} while(0)
#ifdef _KERNEL
+/* interface link layer address change event */
+typedef void (*iflladdr_event_handler_t)(void *, struct ifnet *);
+EVENTHANDLER_DECLARE(iflladdr_event, iflladdr_event_handler_t);
/* interface address change event */
typedef void (*ifaddr_event_handler_t)(void *, struct ifnet *);
EVENTHANDLER_DECLARE(ifaddr_event, ifaddr_event_handler_t);
Modified: head/sys/net/if_vlan.c
==============================================================================
--- head/sys/net/if_vlan.c Mon Jan 18 20:25:29 2010 (r202587)
+++ head/sys/net/if_vlan.c Mon Jan 18 20:34:00 2010 (r202588)
@@ -138,6 +138,7 @@ SYSCTL_INT(_net_link_vlan, OID_AUTO, sof
static MALLOC_DEFINE(M_VLAN, VLANNAME, "802.1Q Virtual LAN Interface");
static eventhandler_tag ifdetach_tag;
+static eventhandler_tag iflladdr_tag;
/*
* We have a global mutex, that is used to serialize configuration
@@ -199,6 +200,7 @@ static int vlan_clone_create(struct if_c
static int vlan_clone_destroy(struct if_clone *, struct ifnet *);
static void vlan_ifdetach(void *arg, struct ifnet *ifp);
+static void vlan_iflladdr(void *arg, struct ifnet *ifp);
static struct if_clone vlan_cloner = IFC_CLONE_INITIALIZER(VLANNAME, NULL,
IF_MAXUNIT, NULL, vlan_clone_match, vlan_clone_create, vlan_clone_destroy);
@@ -463,6 +465,41 @@ vlan_setmulti(struct ifnet *ifp)
}
/*
+ * A handler for parent interface link layer address changes.
+ * If the parent interface link layer address is changed we
+ * should also change it on all children vlans.
+ */
+static void
+vlan_iflladdr(void *arg __unused, struct ifnet *ifp)
+{
+ struct ifvlan *ifv;
+ int i;
+
+ /*
+ * Check if it's a trunk interface first of all
+ * to avoid needless locking.
+ */
+ if (ifp->if_vlantrunk == NULL)
+ return;
+
+ VLAN_LOCK();
+ /*
+ * OK, it's a trunk. Loop over and change all vlan's lladdrs on it.
+ */
+#ifdef VLAN_ARRAY
+ for (i = 0; i < VLAN_ARRAY_SIZE; i++)
+ if ((ifv = ifp->if_vlantrunk->vlans[i]))
+ if_setlladdr(ifv->ifv_ifp, IF_LLADDR(ifp), ETHER_ADDR_LEN);
+#else /* VLAN_ARRAY */
+ for (i = 0; i < (1 << ifp->if_vlantrunk->hwidth); i++)
+ LIST_FOREACH(ifv, &ifp->if_vlantrunk->hash[i], ifv_list)
+ if_setlladdr(ifv->ifv_ifp, IF_LLADDR(ifp), ETHER_ADDR_LEN);
+#endif /* VLAN_ARRAY */
+ VLAN_UNLOCK();
+
+}
+
+/*
* A handler for network interface departure events.
* Track departure of trunks here so that we don't access invalid
* pointers or whatever if a trunk is ripped from under us, e.g.,
@@ -537,6 +574,10 @@ vlan_modevent(module_t mod, int type, vo
vlan_ifdetach, NULL, EVENTHANDLER_PRI_ANY);
if (ifdetach_tag == NULL)
return (ENOMEM);
+ iflladdr_tag = EVENTHANDLER_REGISTER(iflladdr_event,
+ vlan_iflladdr, NULL, EVENTHANDLER_PRI_ANY);
+ if (iflladdr_tag == NULL)
+ return (ENOMEM);
VLAN_LOCK_INIT();
vlan_input_p = vlan_input;
vlan_link_state_p = vlan_link_state;
@@ -555,6 +596,7 @@ vlan_modevent(module_t mod, int type, vo
case MOD_UNLOAD:
if_clone_detach(&vlan_cloner);
EVENTHANDLER_DEREGISTER(ifnet_departure_event, ifdetach_tag);
+ EVENTHANDLER_DEREGISTER(iflladdr_event, iflladdr_tag);
vlan_input_p = NULL;
vlan_link_state_p = NULL;
vlan_trunk_cap_p = NULL;
Modified: head/sys/netgraph/ng_eiface.c
==============================================================================
--- head/sys/netgraph/ng_eiface.c Mon Jan 18 20:25:29 2010 (r202587)
+++ head/sys/netgraph/ng_eiface.c Mon Jan 18 20:34:00 2010 (r202588)
@@ -431,6 +431,7 @@ ng_eiface_rcvmsg(node_p node, item_p ite
}
error = if_setlladdr(priv->ifp,
(u_char *)msg->data, ETHER_ADDR_LEN);
+ EVENTHANDLER_INVOKE(iflladdr_event, priv->ifp);
break;
}
Modified: head/sys/netgraph/ng_ether.c
==============================================================================
--- head/sys/netgraph/ng_ether.c Mon Jan 18 20:25:29 2010 (r202587)
+++ head/sys/netgraph/ng_ether.c Mon Jan 18 20:34:00 2010 (r202588)
@@ -481,6 +481,7 @@ ng_ether_rcvmsg(node_p node, item_p item
}
error = if_setlladdr(priv->ifp,
(u_char *)msg->data, ETHER_ADDR_LEN);
+ EVENTHANDLER_INVOKE(iflladdr_event, priv->ifp);
break;
}
case NGM_ETHER_GET_PROMISC:
Modified: head/sys/netgraph/ng_fec.c
==============================================================================
--- head/sys/netgraph/ng_fec.c Mon Jan 18 20:25:29 2010 (r202587)
+++ head/sys/netgraph/ng_fec.c Mon Jan 18 20:34:00 2010 (r202588)
@@ -433,6 +433,7 @@ ng_fec_addport(struct ng_fec_private *pr
/* Set up phony MAC address. */
if_setlladdr(bifp, IF_LLADDR(ifp), ETHER_ADDR_LEN);
+ EVENTHANDLER_INVOKE(iflladdr_event, bifp);
/* Save original input vector */
new->fec_if_input = bifp->if_input;
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