Date: Wed, 21 May 2008 23:44:42 +0300 From: "Niki Denev" <nike_d@cytexbg.com> To: "Max Laier" <max@love2party.net> Cc: freebsd-net@freebsd.org Subject: Re: lagg0.2 style vlans on lagg(4) interface Message-ID: <2e77fc10805211344m606886f9pd45ff7b001bc8da0@mail.gmail.com> In-Reply-To: <2e77fc10805211223l7fd69e4cwdd488bada0dc7b95@mail.gmail.com> References: <2e77fc10805211031n6c42ffd2u3dee28164094b83b@mail.gmail.com> <200805211944.42418.max@love2party.net> <2e77fc10805211223l7fd69e4cwdd488bada0dc7b95@mail.gmail.com>
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On Wed, May 21, 2008 at 8:44 PM, Max Laier <max@love2party.net> wrote:
>> It doesn't (and shouldn't have to). I'd simply add an
>> EVENTHANDLER_INVOKE(ifaddr_event, ifp) to if_setlladdr() - we do that for
>> INET[6] address already. Then vlan (and any other device interested in
>> LLaddress changes) can simply register to that eventhandler and resync.
>>
Hi,
Does this look like a reasonable solution?
It passes my limited testing.
Niki
diff -ur /usr/src/sys/net/if.c
/usr/src/.zfs/snapshot/vlan_lladdr_patch/sys/net/if.c
--- /usr/src/sys/net/if.c 2008-04-29 23:43:08.000000000 +0300
+++ /usr/src/.zfs/snapshot/vlan_lladdr_patch/sys/net/if.c
2008-05-21 22:12:33.989318352 +0300
@@ -2647,6 +2647,11 @@
}
#endif
}
+ /*
+ * Notify interested parties (clonable children like if_vlan(4))
+ * about the link layer address change
+ */
+ EVENTHANDLER_INVOKE(ifaddr_event, ifp);
return (0);
}
diff -ur /usr/src/sys/net/if_vlan.c
/usr/src/.zfs/snapshot/vlan_lladdr_patch/sys/net/if_vlan.c
--- /usr/src/sys/net/if_vlan.c 2007-10-28 18:24:16.000000000 +0200
+++ /usr/src/.zfs/snapshot/vlan_lladdr_patch/sys/net/if_vlan.c
2008-05-21 23:24:13.322156460 +0300
@@ -137,6 +137,7 @@
static MALLOC_DEFINE(M_VLAN, VLANNAME, "802.1Q Virtual LAN Interface");
static eventhandler_tag ifdetach_tag;
+static eventhandler_tag ifaddr_tag;
/*
* We have a global mutex, that is used to serialize configuration
@@ -518,6 +519,33 @@
/* For if_link_state_change() eyes only... */
extern void (*vlan_link_state_p)(struct ifnet *, int);
+/*
+ * Update vlan interface link layer address on
+ * parent interface link layer address change.
+ */
+static int
+vlan_lladdr_update(void *arg __unused, struct ifnet *ifp)
+{
+ struct ifvlantrunk *trunk = ifp->if_vlantrunk;
+ struct ifvlan *ifv;
+ int i;
+
+ TRUNK_LOCK(trunk);
+#ifdef VLAN_ARRAY
+ for (i = 0; i < VLAN_ARRAY_SIZE; i++)
+ if (trunk->vlans[i] != NULL) {
+ ifv = trunk->vlans[i];
+#else
+ for (i = 0; i < (1 << trunk->hwidth); i++) {
+ LIST_FOREACH(ifv, &trunk->hash[i], ifv_list)
+#endif
+ bcopy(IF_LLADDR(ifp), IF_LLADDR(ifv->ifv_ifp),
+ ETHER_ADDR_LEN);
+ }
+ TRUNK_UNLOCK(trunk);
+ return 0;
+}
+
static int
vlan_modevent(module_t mod, int type, void *data)
{
@@ -528,6 +556,10 @@
vlan_ifdetach, NULL, EVENTHANDLER_PRI_ANY);
if (ifdetach_tag == NULL)
return (ENOMEM);
+ ifaddr_tag = EVENTHANDLER_REGISTER(ifaddr_event,
+ vlan_lladdr_update, NULL, EVENTHANDLER_PRI_ANY);
+ if (ifaddr_tag == NULL)
+ return (ENOMEM);
VLAN_LOCK_INIT();
vlan_input_p = vlan_input;
vlan_link_state_p = vlan_link_state;
@@ -546,6 +578,7 @@
case MOD_UNLOAD:
if_clone_detach(&vlan_cloner);
EVENTHANDLER_DEREGISTER(ifnet_departure_event, ifdetach_tag);
+ EVENTHANDLER_DEREGISTER(ifaddr_event, ifaddr_tag);
vlan_input_p = NULL;
vlan_link_state_p = NULL;
vlan_trunk_cap_p = NULL;
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