Re: double vlans - once again - experiment unsucsessfull

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To: <freebsd-net@freebsd.org>
Date: Thu, 23 Dec 2004 10:20:41 +0200

well, we've tired both "tunings" - the short-one suggested my M.Balikov and the longer-one, suggested by B.Davis
in both cases - "Protocol not supported"
how we've done this:

on FreeBSD 5.3 stable:

edited if_vlan.c
then
    make buildworld
    make installworld
    mergemaster
    make clean

the test:
ifconfig vlan1 create
ifconfig vlan2 create
ifconfig vlan1 vlan 1 vlandev em0
ifconfig vlan2 vlan 2 vlandev vlan1
SIOCSETVLAN: "Protocol not supported"

or maybe it's possible to use hardware and software tagging simultaneously?
we could achieve double tagging proces by combining hardware and software tag in the ethernet packet.

--------------------------------------------------------------------------------

Re: double vlans - once again.
Brooks Davis
Mon, 20 Dec 2004 10:28:56 -0800

On Sat, Dec 18, 2004 at 08:57:58PM +0200, Mihail Balikov wrote:
> I have done this 2 years ago for FreeBSD 4-STABLE
>
> in sys/net/if_vlan.c in vlan_config(), replace
>
> if (p->if_data.ifi_type != IFT_ETHER)
> return EPROTONOSUPPORT;
>
> with
>
> if (p->if_data.ifi_type != IFT_ETHER &&
> p->if_data.ifi_type != IFT_L2VLAN)
> return EPROTONOSUPPORT;

Hmm, for -current this appears incomplete. I think the following is
what is needed. Any one in a position to test this?

-- Brooks

Index: if_vlan.c
===================================================================
RCS file: /home/ncvs/src/sys/net/if_vlan.c,v
retrieving revision 1.73
diff -u -p -r1.73 if_vlan.c
--- if_vlan.c 15 Aug 2004 06:24:42 -0000 1.73
+++ if_vlan.c 20 Dec 2004 18:25:48 -0000
@@ -273,7 +273,8 @@ vlan_clone_match_ethertag(struct if_clon
        /* Check for <etherif>.<vlan> style interface names. */
        IFNET_RLOCK();
        TAILQ_FOREACH(ifp, &ifnet, if_link) {
- if (ifp->if_type != IFT_ETHER)
+ if (ifp->if_type != IFT_ETHER &&
+ ifp->if_type != IFT_L2VLAN)
                        continue;
                if (strncmp(ifp->if_xname, name, strlen(ifp->if_xname)) != 0)
                        continue;
@@ -566,6 +567,7 @@ vlan_input(struct ifnet *ifp, struct mbu
        } else {
                switch (ifp->if_type) {
                case IFT_ETHER:
+ case IFT_L2VLAN:
                        if (m->m_len < sizeof(*evl) &&
                            (m = m_pullup(m, sizeof(*evl))) == NULL) {
                                if_printf(ifp, "cannot pullup VLAN header\n");
@@ -641,7 +643,8 @@ vlan_config(struct ifvlan *ifv, struct i
 
        VLAN_LOCK_ASSERT();
 
- if (p->if_data.ifi_type != IFT_ETHER)
+ if (p->if_data.ifi_type != IFT_ETHER &&
+ p->if_data.ifi_type != IFT_L2VLAN)
                return (EPROTONOSUPPORT);
        if (ifv->ifv_p)
                return (EBUSY);
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