2 * Copyright 1998 Massachusetts Institute of Technology
4 * Permission to use, copy, modify, and distribute this software and
5 * its documentation for any purpose and without fee is hereby
6 * granted, provided that both the above copyright notice and this
7 * permission notice appear in all copies, that both the above
8 * copyright notice and this permission notice appear in all
9 * supporting documentation, and that the name of M.I.T. not be used
10 * in advertising or publicity pertaining to distribution of the
11 * software without specific, written prior permission. M.I.T. makes
12 * no representations about the suitability of this software for any
13 * purpose. It is provided "as is" without express or implied
16 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
17 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
20 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * $FreeBSD: src/sys/net/if_vlan.c,v 1.15.2.13 2003/02/14 22:25:58 fenner Exp $
30 * $DragonFly: src/sys/net/vlan/if_vlan.c,v 1.36 2008/06/24 11:40:56 sephe Exp $
34 * if_vlan.c - pseudo-device driver for IEEE 802.1Q virtual LANs.
35 * Might be extended some day to also handle IEEE 802.1p priority
36 * tagging. This is sort of sneaky in the implementation, since
37 * we need to pretend to be enough of an Ethernet implementation
38 * to make arp work. The way we do this is by telling everyone
39 * that we are an Ethernet, and then catch the packets that
40 * ether_output() left on our output queue queue when it calls
41 * if_start(), rewrite them for use by the real outgoing interface,
42 * and ask it to send them.
49 #include "opt_ethernet.h"
51 #include <sys/param.h>
52 #include <sys/systm.h>
53 #include <sys/kernel.h>
54 #include <sys/malloc.h>
56 #include <sys/module.h>
57 #include <sys/queue.h>
58 #include <sys/socket.h>
59 #include <sys/sockio.h>
60 #include <sys/sysctl.h>
62 #include <sys/thread2.h>
65 #include <net/ethernet.h>
67 #include <net/if_arp.h>
68 #include <net/if_dl.h>
69 #include <net/if_types.h>
70 #include <net/ifq_var.h>
71 #include <net/if_clone.h>
72 #include <net/netmsg2.h>
75 #include <netinet/in.h>
76 #include <netinet/if_ether.h>
79 #include <net/vlan/if_vlan_var.h>
80 #include <net/vlan/if_vlan_ether.h>
84 struct vlan_mc_entry {
85 struct ether_addr mc_addr;
86 SLIST_ENTRY(vlan_mc_entry) mc_entries;
91 LIST_ENTRY(vlan_entry) ifv_link;
95 struct arpcom ifv_ac; /* make this an interface */
96 struct ifnet *ifv_p; /* parent inteface of this vlan */
99 uint16_t ifvm_proto; /* encapsulation ethertype */
100 uint16_t ifvm_tag; /* tag to apply on packets leaving if */
102 SLIST_HEAD(, vlan_mc_entry) vlan_mc_listhead;
103 LIST_ENTRY(ifvlan) ifv_list;
104 struct vlan_entry ifv_entries[1];
106 #define ifv_if ifv_ac.ac_if
107 #define ifv_tag ifv_mib.ifvm_tag
110 LIST_HEAD(, vlan_entry) vlan_list;
114 struct netmsg nv_nmsg;
115 struct ifvlan *nv_ifv;
116 struct ifnet *nv_ifp_p;
117 const char *nv_parent_name;
121 #define VLANNAME "vlan"
123 SYSCTL_DECL(_net_link);
124 SYSCTL_NODE(_net_link, IFT_L2VLAN, vlan, CTLFLAG_RW, 0, "IEEE 802.1Q VLAN");
125 SYSCTL_NODE(_net_link_vlan, PF_LINK, link, CTLFLAG_RW, 0, "for consistency");
127 static MALLOC_DEFINE(M_VLAN, "vlan", "802.1Q Virtual LAN Interface");
128 static LIST_HEAD(, ifvlan) ifv_list;
130 static int vlan_clone_create(struct if_clone *, int);
131 static void vlan_clone_destroy(struct ifnet *);
132 static void vlan_ifdetach(void *, struct ifnet *);
134 static void vlan_init(void *);
135 static void vlan_start(struct ifnet *);
136 static int vlan_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
138 static int vlan_input(struct mbuf *m, struct mbuf_chain *);
140 static void vlan_input2(struct mbuf *);
143 static void vlan_clrmulti(struct ifvlan *, struct ifnet *);
144 static int vlan_setmulti(struct ifvlan *, struct ifnet *);
145 static int vlan_config_multi(struct ifvlan *);
146 static int vlan_config(struct ifvlan *, const char *, uint16_t);
147 static int vlan_unconfig(struct ifvlan *);
148 static void vlan_link(struct ifvlan *, struct ifnet *);
149 static void vlan_unlink(struct ifvlan *, struct ifnet *);
151 static void vlan_config_dispatch(struct netmsg *);
152 static void vlan_unconfig_dispatch(struct netmsg *);
153 static void vlan_link_dispatch(struct netmsg *);
154 static void vlan_unlink_dispatch(struct netmsg *);
155 static void vlan_multi_dispatch(struct netmsg *);
156 static void vlan_ifdetach_dispatch(struct netmsg *);
158 static eventhandler_tag vlan_ifdetach_cookie;
159 static struct if_clone vlan_cloner =
160 IF_CLONE_INITIALIZER("vlan", vlan_clone_create, vlan_clone_destroy,
164 vlan_forwardmsg(struct lwkt_msg *lmsg, int next_cpu)
166 if (next_cpu < ncpus)
167 lwkt_forwardmsg(ifnet_portfn(next_cpu), lmsg);
169 lwkt_replymsg(lmsg, 0);
173 * Program our multicast filter. What we're actually doing is
174 * programming the multicast filter of the parent. This has the
175 * side effect of causing the parent interface to receive multicast
176 * traffic that it doesn't really want, which ends up being discarded
177 * later by the upper protocol layers. Unfortunately, there's no way
178 * to avoid this: there really is only one physical interface.
181 vlan_setmulti(struct ifvlan *ifv, struct ifnet *ifp_p)
183 struct ifmultiaddr *ifma, *rifma = NULL;
184 struct vlan_mc_entry *mc = NULL;
185 struct sockaddr_dl sdl;
186 struct ifnet *ifp = &ifv->ifv_if;
188 ASSERT_NOT_SERIALIZED(ifp->if_serializer);
191 * First, remove any existing filter entries.
193 vlan_clrmulti(ifv, ifp_p);
196 * Now program new ones.
198 bzero(&sdl, sizeof(sdl));
199 sdl.sdl_len = sizeof(sdl);
200 sdl.sdl_family = AF_LINK;
201 sdl.sdl_index = ifp_p->if_index;
202 sdl.sdl_type = IFT_ETHER;
203 sdl.sdl_alen = ETHER_ADDR_LEN;
205 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
208 if (ifma->ifma_addr->sa_family != AF_LINK)
212 mc = kmalloc(sizeof(struct vlan_mc_entry), M_VLAN, M_WAITOK);
213 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
214 &mc->mc_addr, ETHER_ADDR_LEN);
215 SLIST_INSERT_HEAD(&ifv->vlan_mc_listhead, mc, mc_entries);
217 /* Program the parent multicast filter */
218 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
219 LLADDR(&sdl), ETHER_ADDR_LEN);
220 error = if_addmulti(ifp_p, (struct sockaddr *)&sdl, &rifma);
228 vlan_clrmulti(struct ifvlan *ifv, struct ifnet *ifp_p)
230 struct vlan_mc_entry *mc;
231 struct sockaddr_dl sdl;
233 ASSERT_NOT_SERIALIZED(ifv->ifv_if.if_serializer);
235 bzero(&sdl, sizeof(sdl));
236 sdl.sdl_len = sizeof(sdl);
237 sdl.sdl_family = AF_LINK;
238 sdl.sdl_index = ifp_p->if_index;
239 sdl.sdl_type = IFT_ETHER;
240 sdl.sdl_alen = ETHER_ADDR_LEN;
242 while ((mc = SLIST_FIRST(&ifv->vlan_mc_listhead)) != NULL) {
243 bcopy(&mc->mc_addr, LLADDR(&sdl), ETHER_ADDR_LEN);
244 if_delmulti(ifp_p, (struct sockaddr *)&sdl); /* ignore error */
246 SLIST_REMOVE_HEAD(&ifv->vlan_mc_listhead, mc_entries);
252 vlan_modevent(module_t mod, int type, void *data)
256 LIST_INIT(&ifv_list);
257 vlan_input_p = vlan_input;
259 vlan_input2_p = vlan_input2;
261 vlan_input2_p = NULL;
263 vlan_ifdetach_cookie =
264 EVENTHANDLER_REGISTER(ifnet_detach_event,
266 EVENTHANDLER_PRI_ANY);
267 if_clone_attach(&vlan_cloner);
271 if_clone_detach(&vlan_cloner);
273 vlan_input2_p = NULL;
274 EVENTHANDLER_DEREGISTER(ifnet_detach_event,
275 vlan_ifdetach_cookie);
276 while (!LIST_EMPTY(&ifv_list))
277 vlan_clone_destroy(&LIST_FIRST(&ifv_list)->ifv_if);
283 static moduledata_t vlan_mod = {
289 DECLARE_MODULE(if_vlan, vlan_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
292 vlan_ifdetach_dispatch(struct netmsg *nmsg)
294 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)nmsg;
295 struct ifnet *ifp_p = vmsg->nv_ifp_p;
296 struct vlan_trunk *vlantrunks, *trunk;
297 struct vlan_entry *ifve;
299 vlantrunks = ifp_p->if_vlantrunks;
300 if (vlantrunks == NULL)
302 trunk = &vlantrunks[mycpuid];
304 while (ifp_p->if_vlantrunks &&
305 (ifve = LIST_FIRST(&trunk->vlan_list)) != NULL)
306 vlan_unconfig(ifve->ifv);
308 lwkt_replymsg(&nmsg->nm_lmsg, 0);
312 vlan_ifdetach(void *arg __unused, struct ifnet *ifp)
314 struct netmsg_vlan vmsg;
317 ASSERT_NOT_SERIALIZED(ifp->if_serializer);
319 bzero(&vmsg, sizeof(vmsg));
320 nmsg = &vmsg.nv_nmsg;
322 netmsg_init(nmsg, &curthread->td_msgport, 0, vlan_ifdetach_dispatch);
325 lwkt_domsg(cpu_portfn(0), &nmsg->nm_lmsg, 0);
329 vlan_clone_create(struct if_clone *ifc, int unit)
335 vlan_size = sizeof(struct ifvlan)
336 + ((ncpus - 1) * sizeof(struct vlan_entry));
337 ifv = kmalloc(vlan_size, M_VLAN, M_WAITOK | M_ZERO);
338 SLIST_INIT(&ifv->vlan_mc_listhead);
339 for (i = 0; i < ncpus; ++i)
340 ifv->ifv_entries[i].ifv = ifv;
342 crit_enter(); /* XXX not MP safe */
343 LIST_INSERT_HEAD(&ifv_list, ifv, ifv_list);
348 if_initname(ifp, "vlan", unit);
349 /* NB: flags are not set here */
350 ifp->if_linkmib = &ifv->ifv_mib;
351 ifp->if_linkmiblen = sizeof ifv->ifv_mib;
352 /* NB: mtu is not set here */
354 ifp->if_init = vlan_init;
355 ifp->if_start = vlan_start;
356 ifp->if_ioctl = vlan_ioctl;
357 ifq_set_maxlen(&ifp->if_snd, ifqmaxlen);
358 ifq_set_ready(&ifp->if_snd);
359 ether_ifattach(ifp, ifv->ifv_ac.ac_enaddr, NULL);
360 /* Now undo some of the damage... */
361 ifp->if_data.ifi_type = IFT_L2VLAN;
362 ifp->if_data.ifi_hdrlen = EVL_ENCAPLEN;
368 vlan_clone_destroy(struct ifnet *ifp)
370 struct ifvlan *ifv = ifp->if_softc;
372 crit_enter(); /* XXX not MP safe */
373 LIST_REMOVE(ifv, ifv_list);
385 struct ifvlan *ifv = xsc;
386 struct ifnet *ifp = &ifv->ifv_if;
388 ASSERT_SERIALIZED(ifp->if_serializer);
390 if (ifv->ifv_p != NULL)
391 ifp->if_flags |= IFF_RUNNING;
395 vlan_start(struct ifnet *ifp)
397 struct ifvlan *ifv = ifp->if_softc;
398 struct ifnet *ifp_p = ifv->ifv_p;
401 ASSERT_SERIALIZED(ifp->if_serializer);
404 ifq_purge(&ifp->if_snd);
408 if ((ifp->if_flags & IFF_RUNNING) == 0)
412 struct netmsg_packet *nmp;
414 struct lwkt_port *port;
416 m = ifq_dequeue(&ifp->if_snd, NULL);
422 * Do not run parent's if_start() if the parent is not up,
423 * or parent's driver will cause a system crash.
425 if ((ifp_p->if_flags & (IFF_UP | IFF_RUNNING)) !=
426 (IFF_UP | IFF_RUNNING)) {
428 ifp->if_data.ifi_collisions++;
433 * We need some way to tell the interface where the packet
434 * came from so that it knows how to find the VLAN tag to
435 * use, so we set the ether_vlantag in the mbuf packet header
436 * to our vlan tag. We also set the M_VLANTAG flag in the
437 * mbuf to let the parent driver know that the ether_vlantag
440 m->m_pkthdr.ether_vlantag = ifv->ifv_tag;
441 m->m_flags |= M_VLANTAG;
443 nmp = &m->m_hdr.mh_netmsg;
444 nmsg = &nmp->nm_netmsg;
446 netmsg_init(nmsg, &netisr_apanic_rport, 0, vlan_start_dispatch);
448 nmsg->nm_lmsg.u.ms_resultp = ifp_p;
450 port = cpu_portfn(ifp_p->if_index % ncpus /* XXX */);
451 lwkt_sendmsg(port, &nmp->nm_netmsg.nm_lmsg);
457 vlan_input(struct mbuf *m, struct mbuf_chain *chain)
459 struct ifvlan *ifv = NULL;
461 struct vlan_trunk *vlantrunks;
462 struct vlan_entry *entry;
464 rcvif = m->m_pkthdr.rcvif;
465 ASSERT_SERIALIZED(rcvif->if_serializer);
466 KKASSERT(m->m_flags & M_VLANTAG);
468 vlantrunks = rcvif->if_vlantrunks;
469 if (vlantrunks == NULL) {
476 LIST_FOREACH(entry, &vlantrunks[mycpuid].vlan_list, ifv_link) {
477 if (entry->ifv->ifv_tag ==
478 EVL_VLANOFTAG(m->m_pkthdr.ether_vlantag)) {
486 * Packet is discarded if:
487 * - no corresponding vlan(4) interface
488 * - vlan(4) interface has not been completely set up yet,
489 * or is being destroyed (ifv->ifv_p != rcvif)
490 * - vlan(4) interface is not brought up
492 if (ifv == NULL || ifv->ifv_p != rcvif ||
493 (ifv->ifv_if.if_flags & IFF_UP) == 0) {
496 return -1; /* so ether_input can take note */
500 * Clear M_VLANTAG, before the packet is handed to
503 m->m_flags &= ~M_VLANTAG;
505 ifv->ifv_if.if_ipackets++;
506 lwkt_serialize_exit(rcvif->if_serializer);
507 lwkt_serialize_enter(ifv->ifv_if.if_serializer);
508 ether_input_chain(&ifv->ifv_if, m, chain);
509 lwkt_serialize_exit(ifv->ifv_if.if_serializer);
510 lwkt_serialize_enter(rcvif->if_serializer);
517 vlan_input2(struct mbuf *m)
519 struct ifvlan *ifv = NULL;
520 struct ifnet *rcvif, *ifp;
521 struct vlan_trunk *vlantrunks;
522 struct vlan_entry *entry;
524 rcvif = m->m_pkthdr.rcvif;
525 KKASSERT(m->m_flags & M_VLANTAG);
527 vlantrunks = rcvif->if_vlantrunks;
528 if (vlantrunks == NULL) {
534 crit_enter(); /* XXX Necessary? */
535 LIST_FOREACH(entry, &vlantrunks[mycpuid].vlan_list, ifv_link) {
536 if (entry->ifv->ifv_tag ==
537 EVL_VLANOFTAG(m->m_pkthdr.ether_vlantag)) {
545 * Packet is discarded if:
546 * - no corresponding vlan(4) interface
547 * - vlan(4) interface has not been completely set up yet,
548 * or is being destroyed (ifv->ifv_p != rcvif)
549 * - vlan(4) interface is not brought up
551 if (ifv == NULL || ifv->ifv_p != rcvif ||
552 (ifv->ifv_if.if_flags & IFF_UP) == 0) {
560 * Clear M_VLANTAG, before the packet is handed to
563 m->m_flags &= ~M_VLANTAG;
565 /* Change receiving interface */
566 m->m_pkthdr.rcvif = ifp;
568 /* Update statistics */
570 ifp->if_ibytes += m->m_pkthdr.len;
571 if (m->m_flags & (M_MCAST | M_BCAST))
576 if (ifp->if_flags & IFF_MONITOR) {
578 * Interface marked for monitoring; discard packet.
583 ether_input_oncpu(ifp, m);
586 #endif /* ETHER_INPUT2 */
589 vlan_link_dispatch(struct netmsg *nmsg)
591 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)nmsg;
592 struct ifvlan *ifv = vmsg->nv_ifv;
593 struct ifnet *ifp_p = vmsg->nv_ifp_p;
594 struct vlan_entry *entry;
595 struct vlan_trunk *vlantrunks, *trunk;
598 vlantrunks = ifp_p->if_vlantrunks;
599 KASSERT(vlantrunks != NULL,
600 ("vlan trunk has not been initialized yet\n"));
602 entry = &ifv->ifv_entries[cpu];
603 trunk = &vlantrunks[cpu];
606 LIST_INSERT_HEAD(&trunk->vlan_list, entry, ifv_link);
609 vlan_forwardmsg(&nmsg->nm_lmsg, cpu + 1);
613 vlan_link(struct ifvlan *ifv, struct ifnet *ifp_p)
615 struct netmsg_vlan vmsg;
618 /* Assert in netisr0 */
619 ASSERT_NOT_SERIALIZED(ifv->ifv_if.if_serializer);
621 if (ifp_p->if_vlantrunks == NULL) {
622 struct vlan_trunk *vlantrunks;
625 vlantrunks = kmalloc(sizeof(*vlantrunks) * ncpus, M_VLAN,
627 for (i = 0; i < ncpus; ++i)
628 LIST_INIT(&vlantrunks[i].vlan_list);
630 ifp_p->if_vlantrunks = vlantrunks;
633 bzero(&vmsg, sizeof(vmsg));
634 nmsg = &vmsg.nv_nmsg;
636 netmsg_init(nmsg, &curthread->td_msgport, 0, vlan_link_dispatch);
638 vmsg.nv_ifp_p = ifp_p;
640 lwkt_domsg(ifnet_portfn(0), &nmsg->nm_lmsg, 0);
644 vlan_config_dispatch(struct netmsg *nmsg)
646 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)nmsg;
648 struct ifnet *ifp_p, *ifp;
649 struct sockaddr_dl *sdl1, *sdl2;
652 /* Assert in netisr0 */
654 ifp_p = ifunit(vmsg->nv_parent_name);
660 if (ifp_p->if_data.ifi_type != IFT_ETHER) {
661 error = EPROTONOSUPPORT;
673 /* Link vlan into parent's vlantrunk */
674 vlan_link(ifv, ifp_p);
676 lwkt_serialize_enter(ifp->if_serializer);
678 ifv->ifv_tag = vmsg->nv_vlantag;
679 if (ifp_p->if_capenable & IFCAP_VLAN_MTU)
680 ifp->if_mtu = ifp_p->if_mtu;
682 ifp->if_mtu = ifp_p->if_data.ifi_mtu - EVL_ENCAPLEN;
685 * Copy only a selected subset of flags from the parent.
686 * Other flags are none of our business.
688 ifp->if_flags = (ifp_p->if_flags &
689 (IFF_BROADCAST | IFF_MULTICAST | IFF_SIMPLEX | IFF_POINTOPOINT));
692 * Set up our ``Ethernet address'' to reflect the underlying
693 * physical interface's.
695 sdl1 = IF_LLSOCKADDR(ifp);
696 sdl2 = IF_LLSOCKADDR(ifp_p);
697 sdl1->sdl_type = IFT_ETHER;
698 sdl1->sdl_alen = ETHER_ADDR_LEN;
699 bcopy(LLADDR(sdl2), LLADDR(sdl1), ETHER_ADDR_LEN);
700 bcopy(LLADDR(sdl2), ifv->ifv_ac.ac_enaddr, ETHER_ADDR_LEN);
703 * Release vlan's serializer before reprogramming parent's
704 * multicast filter to avoid possible dead lock.
706 lwkt_serialize_exit(ifp->if_serializer);
709 * Configure multicast addresses that may already be
710 * joined on the vlan device.
712 vlan_setmulti(ifv, ifp_p);
715 * Connect to parent after everything have been set up,
716 * so input/output could know that vlan is ready to go
721 lwkt_replymsg(&nmsg->nm_lmsg, error);
725 vlan_config(struct ifvlan *ifv, const char *parent_name, uint16_t vlantag)
727 struct netmsg_vlan vmsg;
730 ASSERT_NOT_SERIALIZED(ifv->ifv_if.if_serializer);
732 bzero(&vmsg, sizeof(vmsg));
733 nmsg = &vmsg.nv_nmsg;
735 netmsg_init(nmsg, &curthread->td_msgport, 0, vlan_config_dispatch);
737 vmsg.nv_parent_name = parent_name;
738 vmsg.nv_vlantag = vlantag;
740 return lwkt_domsg(cpu_portfn(0), &nmsg->nm_lmsg, 0);
744 vlan_unlink_dispatch(struct netmsg *nmsg)
746 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)nmsg;
747 struct ifvlan *ifv = vmsg->nv_ifv;
748 struct vlan_entry *entry;
751 KASSERT(vmsg->nv_ifp_p->if_vlantrunks != NULL,
752 ("vlan trunk has not been initialized yet\n"));
753 entry = &ifv->ifv_entries[cpu];
756 LIST_REMOVE(entry, ifv_link);
759 vlan_forwardmsg(&nmsg->nm_lmsg, cpu + 1);
763 vlan_unlink(struct ifvlan *ifv, struct ifnet *ifp_p)
765 struct vlan_trunk *vlantrunks = ifp_p->if_vlantrunks;
766 struct netmsg_vlan vmsg;
769 /* Assert in netisr0 */
770 ASSERT_NOT_SERIALIZED(ifv->ifv_if.if_serializer);
772 KASSERT(ifp_p->if_vlantrunks != NULL,
773 ("vlan trunk has not been initialized yet\n"));
775 bzero(&vmsg, sizeof(vmsg));
776 nmsg = &vmsg.nv_nmsg;
778 netmsg_init(nmsg, &curthread->td_msgport, 0, vlan_unlink_dispatch);
780 vmsg.nv_ifp_p = ifp_p;
782 lwkt_domsg(ifnet_portfn(0), &nmsg->nm_lmsg, 0);
785 if (LIST_EMPTY(&vlantrunks[mycpuid].vlan_list)) {
787 ifp_p->if_vlantrunks = NULL;
788 netmsg_service_sync();
789 kfree(vlantrunks, M_VLAN);
791 lwkt_serialize_enter(ifp_p->if_serializer);
792 kfree(ifp_p->if_vlantrunks, M_VLAN);
793 ifp_p->if_vlantrunks = NULL;
794 lwkt_serialize_exit(ifp_p->if_serializer);
801 vlan_unconfig_dispatch(struct netmsg *nmsg)
803 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)nmsg;
804 struct sockaddr_dl *sdl;
806 struct ifnet *ifp_p, *ifp;
809 /* Assert in netisr0 */
814 if (ifp->if_flags & IFF_UP)
817 lwkt_serialize_enter(ifp->if_serializer);
819 ifp->if_flags &= ~IFF_RUNNING;
822 * Save parent ifnet pointer and disconnect from parent.
824 * This is done early in this function, so input/output could
825 * know that we are disconnecting.
831 * Release vlan's serializer before reprogramming parent's
832 * multicast filter to avoid possible dead lock.
834 lwkt_serialize_exit(ifp->if_serializer);
838 * Since the interface is being unconfigured, we need to
839 * empty the list of multicast groups that we may have joined
840 * while we were alive from the parent's list.
842 vlan_clrmulti(ifv, ifp_p);
845 lwkt_serialize_enter(ifp->if_serializer);
847 ifp->if_mtu = ETHERMTU;
849 /* Clear our MAC address. */
850 sdl = IF_LLSOCKADDR(ifp);
851 sdl->sdl_type = IFT_ETHER;
852 sdl->sdl_alen = ETHER_ADDR_LEN;
853 bzero(LLADDR(sdl), ETHER_ADDR_LEN);
854 bzero(ifv->ifv_ac.ac_enaddr, ETHER_ADDR_LEN);
856 lwkt_serialize_exit(ifp->if_serializer);
858 /* Unlink vlan from parent's vlantrunk */
859 if (ifp_p != NULL && ifp_p->if_vlantrunks != NULL)
860 vlan_unlink(ifv, ifp_p);
863 lwkt_replymsg(&nmsg->nm_lmsg, error);
867 vlan_unconfig(struct ifvlan *ifv)
869 struct netmsg_vlan vmsg;
872 ASSERT_NOT_SERIALIZED(ifv->ifv_if.if_serializer);
874 bzero(&vmsg, sizeof(vmsg));
875 nmsg = &vmsg.nv_nmsg;
877 netmsg_init(nmsg, &curthread->td_msgport, 0, vlan_unconfig_dispatch);
880 return lwkt_domsg(cpu_portfn(0), &nmsg->nm_lmsg, 0);
884 vlan_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr)
886 struct ifvlan *ifv = ifp->if_softc;
887 struct ifreq *ifr = (struct ifreq *)data;
892 ASSERT_SERIALIZED(ifp->if_serializer);
899 * Release vlan interface's serializer to void
900 * possible dead lock.
902 lwkt_serialize_exit(ifp->if_serializer);
904 lwkt_serialize_enter(ifp_p->if_serializer);
905 error = ifp_p->if_ioctl(ifp_p, SIOCGIFMEDIA, data, cr);
906 lwkt_serialize_exit(ifp_p->if_serializer);
908 lwkt_serialize_enter(ifp->if_serializer);
910 if (ifv->ifv_p == NULL && ifv->ifv_p != ifp_p) {
912 * We are disconnected from the original
913 * parent interface or the parent interface
914 * is changed, after vlan interface's
915 * serializer is released.
920 /* Limit the result to the parent's current config. */
922 struct ifmediareq *ifmr;
924 ifmr = (struct ifmediareq *) data;
925 if (ifmr->ifm_count >= 1 && ifmr->ifm_ulist) {
927 error = copyout(&ifmr->ifm_current,
942 error = copyin(ifr->ifr_data, &vlr, sizeof vlr);
946 lwkt_serialize_exit(ifp->if_serializer);
947 if (vlr.vlr_parent[0] == '\0')
948 error = vlan_unconfig(ifv);
950 error = vlan_config(ifv, vlr.vlr_parent, vlr.vlr_tag);
951 lwkt_serialize_enter(ifp->if_serializer);
955 bzero(&vlr, sizeof(vlr));
957 strlcpy(vlr.vlr_parent, ifv->ifv_p->if_xname,
958 sizeof(vlr.vlr_parent));
959 vlr.vlr_tag = ifv->ifv_tag;
961 error = copyout(&vlr, ifr->ifr_data, sizeof vlr);
965 if (ifp->if_flags & IFF_UP)
968 ifp->if_flags &= ~IFF_RUNNING;
971 * We don't support promiscuous mode
972 * right now because it would require help from the
973 * underlying drivers, which hasn't been implemented.
975 if (ifr->ifr_flags & IFF_PROMISC) {
976 ifp->if_flags &= ~IFF_PROMISC;
983 lwkt_serialize_exit(ifp->if_serializer);
984 error = vlan_config_multi(ifv);
985 lwkt_serialize_enter(ifp->if_serializer);
989 error = ether_ioctl(ifp, cmd, data);
996 vlan_multi_dispatch(struct netmsg *nmsg)
998 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)nmsg;
999 struct ifvlan *ifv = vmsg->nv_ifv;
1003 * If we don't have a parent, just remember the membership for
1006 if (ifv->ifv_p != NULL)
1007 error = vlan_setmulti(ifv, ifv->ifv_p);
1008 lwkt_replymsg(&nmsg->nm_lmsg, error);
1012 vlan_config_multi(struct ifvlan *ifv)
1014 struct netmsg_vlan vmsg;
1015 struct netmsg *nmsg;
1017 ASSERT_NOT_SERIALIZED(ifv->ifv_if.if_serializer);
1019 bzero(&vmsg, sizeof(vmsg));
1020 nmsg = &vmsg.nv_nmsg;
1022 netmsg_init(nmsg, &curthread->td_msgport, 0, vlan_multi_dispatch);
1025 return lwkt_domsg(cpu_portfn(0), &nmsg->nm_lmsg, 0);