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 1.31 2008/03/18 14:12:45 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.
45 * XXX It's incorrect to assume that we must always kludge up
46 * headers on the physical device's behalf: some devices support
47 * VLAN tag insertion and extraction in firmware. For these cases,
48 * one can change the behavior of the vlan interface by setting
49 * the LINK0 flag on it (that is setting the vlan interface's LINK0
50 * flag, _not_ the parent's LINK0 flag; we try to leave the parent
51 * alone). If the interface has the LINK0 flag set, then it will
52 * not modify the ethernet header on output, because the parent
53 * can do that for itself. On input, the parent can call vlan_input_tag()
54 * directly in order to supply us with an incoming mbuf and the vlan
55 * tag value that goes with it.
63 #include <sys/param.h>
64 #include <sys/systm.h>
65 #include <sys/kernel.h>
66 #include <sys/malloc.h>
68 #include <sys/module.h>
69 #include <sys/queue.h>
70 #include <sys/socket.h>
71 #include <sys/sockio.h>
72 #include <sys/sysctl.h>
74 #include <sys/thread2.h>
77 #include <net/ethernet.h>
79 #include <net/if_arp.h>
80 #include <net/if_dl.h>
81 #include <net/if_types.h>
82 #include <net/ifq_var.h>
83 #include <net/if_clone.h>
84 #include <net/netmsg2.h>
87 #include <netinet/in.h>
88 #include <netinet/if_ether.h>
91 #include <net/vlan/if_vlan_var.h>
92 #include <net/vlan/if_vlan_ether.h>
96 struct vlan_mc_entry {
97 struct ether_addr mc_addr;
98 SLIST_ENTRY(vlan_mc_entry) mc_entries;
103 LIST_ENTRY(vlan_entry) ifv_link;
107 struct arpcom ifv_ac; /* make this an interface */
108 struct ifnet *ifv_p; /* parent inteface of this vlan */
111 uint16_t ifvm_proto; /* encapsulation ethertype */
112 uint16_t ifvm_tag; /* tag to apply on packets leaving if */
114 SLIST_HEAD(, vlan_mc_entry) vlan_mc_listhead;
115 LIST_ENTRY(ifvlan) ifv_list;
116 struct vlan_entry ifv_entries[1];
118 #define ifv_if ifv_ac.ac_if
119 #define ifv_tag ifv_mib.ifvm_tag
122 LIST_HEAD(, vlan_entry) vlan_list;
126 struct netmsg nv_nmsg;
127 struct ifvlan *nv_ifv;
128 struct ifnet *nv_ifp_p;
129 const char *nv_parent_name;
133 #define VLANNAME "vlan"
135 SYSCTL_DECL(_net_link);
136 SYSCTL_NODE(_net_link, IFT_L2VLAN, vlan, CTLFLAG_RW, 0, "IEEE 802.1Q VLAN");
137 SYSCTL_NODE(_net_link_vlan, PF_LINK, link, CTLFLAG_RW, 0, "for consistency");
139 static MALLOC_DEFINE(M_VLAN, "vlan", "802.1Q Virtual LAN Interface");
140 static LIST_HEAD(, ifvlan) ifv_list;
142 static int vlan_clone_create(struct if_clone *, int);
143 static void vlan_clone_destroy(struct ifnet *);
144 static void vlan_ifdetach(void *, struct ifnet *);
146 static void vlan_init(void *);
147 static void vlan_start(struct ifnet *);
148 static int vlan_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
150 static int vlan_input(const struct ether_header *eh, struct mbuf *m);
151 static int vlan_input_tag(struct mbuf *m, uint16_t t);
153 static void vlan_clrmulti(struct ifvlan *, struct ifnet *);
154 static int vlan_setmulti(struct ifvlan *, struct ifnet *);
155 static int vlan_config_multi(struct ifvlan *);
156 static int vlan_config(struct ifvlan *, const char *, uint16_t);
157 static int vlan_unconfig(struct ifvlan *);
158 static void vlan_link(struct ifvlan *, struct ifnet *);
159 static void vlan_unlink(struct ifvlan *, struct ifnet *);
161 static void vlan_config_dispatch(struct netmsg *);
162 static void vlan_unconfig_dispatch(struct netmsg *);
163 static void vlan_link_dispatch(struct netmsg *);
164 static void vlan_unlink_dispatch(struct netmsg *);
165 static void vlan_multi_dispatch(struct netmsg *);
166 static void vlan_ifdetach_dispatch(struct netmsg *);
168 static eventhandler_tag vlan_ifdetach_cookie;
169 static struct if_clone vlan_cloner =
170 IF_CLONE_INITIALIZER("vlan", vlan_clone_create, vlan_clone_destroy,
174 vlan_forwardmsg(struct lwkt_msg *lmsg, int next_cpu)
176 if (next_cpu < ncpus)
177 lwkt_forwardmsg(ifa_portfn(next_cpu), lmsg);
179 lwkt_replymsg(lmsg, 0);
183 * Program our multicast filter. What we're actually doing is
184 * programming the multicast filter of the parent. This has the
185 * side effect of causing the parent interface to receive multicast
186 * traffic that it doesn't really want, which ends up being discarded
187 * later by the upper protocol layers. Unfortunately, there's no way
188 * to avoid this: there really is only one physical interface.
191 vlan_setmulti(struct ifvlan *ifv, struct ifnet *ifp_p)
193 struct ifmultiaddr *ifma, *rifma = NULL;
194 struct vlan_mc_entry *mc = NULL;
195 struct sockaddr_dl sdl;
196 struct ifnet *ifp = &ifv->ifv_if;
198 ASSERT_NOT_SERIALIZED(ifp->if_serializer);
201 * First, remove any existing filter entries.
203 vlan_clrmulti(ifv, ifp_p);
206 * Now program new ones.
208 bzero(&sdl, sizeof(sdl));
209 sdl.sdl_len = sizeof(sdl);
210 sdl.sdl_family = AF_LINK;
211 sdl.sdl_index = ifp_p->if_index;
212 sdl.sdl_type = IFT_ETHER;
213 sdl.sdl_alen = ETHER_ADDR_LEN;
215 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
218 if (ifma->ifma_addr->sa_family != AF_LINK)
222 mc = kmalloc(sizeof(struct vlan_mc_entry), M_VLAN, M_WAITOK);
223 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
224 &mc->mc_addr, ETHER_ADDR_LEN);
225 SLIST_INSERT_HEAD(&ifv->vlan_mc_listhead, mc, mc_entries);
227 /* Program the parent multicast filter */
228 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
229 LLADDR(&sdl), ETHER_ADDR_LEN);
230 error = if_addmulti(ifp_p, (struct sockaddr *)&sdl, &rifma);
238 vlan_clrmulti(struct ifvlan *ifv, struct ifnet *ifp_p)
240 struct vlan_mc_entry *mc;
241 struct sockaddr_dl sdl;
243 ASSERT_NOT_SERIALIZED(ifv->ifv_if.if_serializer);
245 bzero(&sdl, sizeof(sdl));
246 sdl.sdl_len = sizeof(sdl);
247 sdl.sdl_family = AF_LINK;
248 sdl.sdl_index = ifp_p->if_index;
249 sdl.sdl_type = IFT_ETHER;
250 sdl.sdl_alen = ETHER_ADDR_LEN;
252 while ((mc = SLIST_FIRST(&ifv->vlan_mc_listhead)) != NULL) {
253 bcopy(&mc->mc_addr, LLADDR(&sdl), ETHER_ADDR_LEN);
254 if_delmulti(ifp_p, (struct sockaddr *)&sdl); /* ignore error */
256 SLIST_REMOVE_HEAD(&ifv->vlan_mc_listhead, mc_entries);
262 vlan_modevent(module_t mod, int type, void *data)
266 LIST_INIT(&ifv_list);
267 vlan_input_p = vlan_input;
268 vlan_input_tag_p = vlan_input_tag;
269 vlan_ifdetach_cookie =
270 EVENTHANDLER_REGISTER(ifnet_detach_event,
272 EVENTHANDLER_PRI_ANY);
273 if_clone_attach(&vlan_cloner);
277 if_clone_detach(&vlan_cloner);
279 vlan_input_tag_p = NULL;
280 EVENTHANDLER_DEREGISTER(ifnet_detach_event,
281 vlan_ifdetach_cookie);
282 while (!LIST_EMPTY(&ifv_list))
283 vlan_clone_destroy(&LIST_FIRST(&ifv_list)->ifv_if);
289 static moduledata_t vlan_mod = {
295 DECLARE_MODULE(if_vlan, vlan_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
298 vlan_ifdetach_dispatch(struct netmsg *nmsg)
300 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)nmsg;
301 struct ifnet *ifp_p = vmsg->nv_ifp_p;
302 struct vlan_trunk *vlantrunks, *trunk;
303 struct vlan_entry *ifve;
305 vlantrunks = ifp_p->if_vlantrunks;
306 if (vlantrunks == NULL)
308 trunk = &vlantrunks[mycpuid];
310 while (ifp_p->if_vlantrunks &&
311 (ifve = LIST_FIRST(&trunk->vlan_list)) != NULL)
312 vlan_unconfig(ifve->ifv);
314 lwkt_replymsg(&nmsg->nm_lmsg, 0);
318 vlan_ifdetach(void *arg __unused, struct ifnet *ifp)
320 struct netmsg_vlan vmsg;
323 ASSERT_NOT_SERIALIZED(ifp->if_serializer);
325 bzero(&vmsg, sizeof(vmsg));
326 nmsg = &vmsg.nv_nmsg;
328 netmsg_init(nmsg, &curthread->td_msgport, 0, vlan_ifdetach_dispatch);
331 lwkt_domsg(cpu_portfn(0), &nmsg->nm_lmsg, 0);
335 vlan_clone_create(struct if_clone *ifc, int unit)
341 vlan_size = sizeof(struct ifvlan)
342 + ((ncpus - 1) * sizeof(struct vlan_entry));
343 ifv = kmalloc(vlan_size, M_VLAN, M_WAITOK | M_ZERO);
344 SLIST_INIT(&ifv->vlan_mc_listhead);
345 for (i = 0; i < ncpus; ++i)
346 ifv->ifv_entries[i].ifv = ifv;
348 crit_enter(); /* XXX not MP safe */
349 LIST_INSERT_HEAD(&ifv_list, ifv, ifv_list);
354 if_initname(ifp, "vlan", unit);
355 /* NB: flags are not set here */
356 ifp->if_linkmib = &ifv->ifv_mib;
357 ifp->if_linkmiblen = sizeof ifv->ifv_mib;
358 /* NB: mtu is not set here */
360 ifp->if_init = vlan_init;
361 ifp->if_start = vlan_start;
362 ifp->if_ioctl = vlan_ioctl;
363 ifq_set_maxlen(&ifp->if_snd, ifqmaxlen);
364 ifq_set_ready(&ifp->if_snd);
365 ether_ifattach(ifp, ifv->ifv_ac.ac_enaddr, NULL);
366 /* Now undo some of the damage... */
367 ifp->if_data.ifi_type = IFT_L2VLAN;
368 ifp->if_data.ifi_hdrlen = EVL_ENCAPLEN;
374 vlan_clone_destroy(struct ifnet *ifp)
376 struct ifvlan *ifv = ifp->if_softc;
378 crit_enter(); /* XXX not MP safe */
379 LIST_REMOVE(ifv, ifv_list);
391 struct ifvlan *ifv = xsc;
392 struct ifnet *ifp = &ifv->ifv_if;
394 ASSERT_SERIALIZED(ifp->if_serializer);
396 if (ifv->ifv_p != NULL)
397 ifp->if_flags |= IFF_RUNNING;
401 vlan_start(struct ifnet *ifp)
403 struct ifvlan *ifv = ifp->if_softc;
404 struct ifnet *ifp_p = ifv->ifv_p;
407 ASSERT_SERIALIZED(ifp->if_serializer);
409 if ((ifp->if_flags & IFF_RUNNING) == 0 || ifp_p == NULL)
412 ifp->if_flags |= IFF_OACTIVE;
414 struct netmsg_packet *nmp;
416 struct lwkt_port *port;
418 m = ifq_dequeue(&ifp->if_snd, NULL);
424 * Do not run parent's if_start() if the parent is not up,
425 * or parent's driver will cause a system crash.
427 if ((ifp_p->if_flags & (IFF_UP | IFF_RUNNING)) !=
428 (IFF_UP | IFF_RUNNING)) {
430 ifp->if_data.ifi_collisions++;
435 * We need some way to tell the interface where the packet
436 * came from so that it knows how to find the VLAN tag to
437 * use, so we set the ether_vlantag in the mbuf packet header
438 * to our vlan tag. We also set the M_VLANTAG flag in the
439 * mbuf to let the parent driver know that the ether_vlantag
442 m->m_pkthdr.ether_vlantag = ifv->ifv_tag;
443 m->m_flags |= M_VLANTAG;
445 nmp = &m->m_hdr.mh_netmsg;
446 nmsg = &nmp->nm_netmsg;
448 netmsg_init(nmsg, &netisr_apanic_rport, 0, vlan_start_dispatch);
450 nmsg->nm_lmsg.u.ms_resultp = ifp_p;
452 port = cpu_portfn(ifp_p->if_index % ncpus /* XXX */);
453 lwkt_sendmsg(port, &nmp->nm_netmsg.nm_lmsg);
456 ifp->if_flags &= ~IFF_OACTIVE;
460 vlan_input_tag(struct mbuf *m, uint16_t t)
466 rcvif = m->m_pkthdr.rcvif;
468 ASSERT_SERIALIZED(rcvif->if_serializer);
471 * Fake up a header and send the packet to the physical interface's
474 if ((bif = rcvif->if_bpf) != NULL)
475 vlan_ether_ptap(bif, m, t);
477 for (ifv = LIST_FIRST(&ifv_list); ifv != NULL;
478 ifv = LIST_NEXT(ifv, ifv_list)) {
479 if (rcvif == ifv->ifv_p && ifv->ifv_tag == t)
483 if (ifv == NULL || (ifv->ifv_if.if_flags & IFF_UP) == 0) {
485 return -1; /* So the parent can take note */
489 * Having found a valid vlan interface corresponding to
490 * the given source interface and vlan tag, run the
491 * the real packet through ether_input().
493 m->m_pkthdr.rcvif = &ifv->ifv_if;
495 ifv->ifv_if.if_ipackets++;
496 lwkt_serialize_exit(rcvif->if_serializer);
497 lwkt_serialize_enter(ifv->ifv_if.if_serializer);
498 ether_input(&ifv->ifv_if, m);
499 lwkt_serialize_exit(ifv->ifv_if.if_serializer);
500 lwkt_serialize_enter(rcvif->if_serializer);
505 vlan_input(const struct ether_header *eh, struct mbuf *m)
509 struct ether_header eh_copy;
511 rcvif = m->m_pkthdr.rcvif;
512 ASSERT_SERIALIZED(rcvif->if_serializer);
514 for (ifv = LIST_FIRST(&ifv_list); ifv != NULL;
515 ifv = LIST_NEXT(ifv, ifv_list)) {
516 if (rcvif == ifv->ifv_p
517 && (EVL_VLANOFTAG(ntohs(*mtod(m, u_int16_t *)))
522 if (ifv == NULL || (ifv->ifv_if.if_flags & IFF_UP) == 0) {
525 return -1; /* so ether_input can take note */
529 * Having found a valid vlan interface corresponding to
530 * the given source interface and vlan tag, remove the
531 * remaining encapsulation (ether_vlan_header minus the ether_header
532 * that had already been removed) and run the real packet
533 * through ether_input() a second time (it had better be
537 eh_copy.ether_type = mtod(m, u_int16_t *)[1]; /* evl_proto */
538 m->m_pkthdr.rcvif = &ifv->ifv_if;
539 m_adj(m, EVL_ENCAPLEN);
540 M_PREPEND(m, ETHER_HDR_LEN, MB_WAIT);
541 *(struct ether_header *)mtod(m, void *) = eh_copy;
543 ifv->ifv_if.if_ipackets++;
544 lwkt_serialize_exit(rcvif->if_serializer);
545 lwkt_serialize_enter(ifv->ifv_if.if_serializer);
546 ether_input(&ifv->ifv_if, m);
547 lwkt_serialize_exit(ifv->ifv_if.if_serializer);
548 lwkt_serialize_enter(rcvif->if_serializer);
553 vlan_link_dispatch(struct netmsg *nmsg)
555 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)nmsg;
556 struct ifvlan *ifv = vmsg->nv_ifv;
557 struct ifnet *ifp_p = vmsg->nv_ifp_p;
558 struct vlan_entry *entry;
559 struct vlan_trunk *vlantrunks, *trunk;
562 vlantrunks = ifp_p->if_vlantrunks;
563 KASSERT(vlantrunks != NULL,
564 ("vlan trunk has not been initialized yet\n"));
566 entry = &ifv->ifv_entries[cpu];
567 trunk = &vlantrunks[cpu];
570 LIST_INSERT_HEAD(&trunk->vlan_list, entry, ifv_link);
573 vlan_forwardmsg(&nmsg->nm_lmsg, cpu + 1);
577 vlan_link(struct ifvlan *ifv, struct ifnet *ifp_p)
579 struct netmsg_vlan vmsg;
582 /* Assert in netisr0 */
583 ASSERT_NOT_SERIALIZED(ifv->ifv_if.if_serializer);
585 if (ifp_p->if_vlantrunks == NULL) {
586 struct vlan_trunk *vlantrunks;
589 vlantrunks = kmalloc(sizeof(*vlantrunks) * ncpus, M_VLAN,
591 for (i = 0; i < ncpus; ++i)
592 LIST_INIT(&vlantrunks[i].vlan_list);
594 ifp_p->if_vlantrunks = vlantrunks;
597 bzero(&vmsg, sizeof(vmsg));
598 nmsg = &vmsg.nv_nmsg;
600 netmsg_init(nmsg, &curthread->td_msgport, 0, vlan_link_dispatch);
602 vmsg.nv_ifp_p = ifp_p;
604 lwkt_domsg(ifa_portfn(0), &nmsg->nm_lmsg, 0);
608 vlan_config_dispatch(struct netmsg *nmsg)
610 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)nmsg;
612 struct ifnet *ifp_p, *ifp;
613 struct sockaddr_dl *sdl1, *sdl2;
616 /* Assert in netisr0 */
618 ifp_p = ifunit(vmsg->nv_parent_name);
624 if (ifp_p->if_data.ifi_type != IFT_ETHER) {
625 error = EPROTONOSUPPORT;
637 /* Link vlan into parent's vlantrunk */
638 vlan_link(ifv, ifp_p);
640 lwkt_serialize_enter(ifp->if_serializer);
642 ifv->ifv_tag = vmsg->nv_vlantag;
643 if (ifp_p->if_capenable & IFCAP_VLAN_MTU)
644 ifp->if_mtu = ifp_p->if_mtu;
646 ifp->if_mtu = ifp_p->if_data.ifi_mtu - EVL_ENCAPLEN;
649 * Copy only a selected subset of flags from the parent.
650 * Other flags are none of our business.
652 ifp->if_flags = (ifp_p->if_flags &
653 (IFF_BROADCAST | IFF_MULTICAST | IFF_SIMPLEX | IFF_POINTOPOINT));
656 * Set up our ``Ethernet address'' to reflect the underlying
657 * physical interface's.
659 sdl1 = IF_LLSOCKADDR(ifp);
660 sdl2 = IF_LLSOCKADDR(ifp_p);
661 sdl1->sdl_type = IFT_ETHER;
662 sdl1->sdl_alen = ETHER_ADDR_LEN;
663 bcopy(LLADDR(sdl2), LLADDR(sdl1), ETHER_ADDR_LEN);
664 bcopy(LLADDR(sdl2), ifv->ifv_ac.ac_enaddr, ETHER_ADDR_LEN);
667 * Release vlan's serializer before reprogramming parent's
668 * multicast filter to avoid possible dead lock.
670 lwkt_serialize_exit(ifp->if_serializer);
673 * Configure multicast addresses that may already be
674 * joined on the vlan device.
676 vlan_setmulti(ifv, ifp_p);
679 * Connect to parent after everything have been set up,
680 * so input/output could know that vlan is ready to go
685 lwkt_replymsg(&nmsg->nm_lmsg, error);
689 vlan_config(struct ifvlan *ifv, const char *parent_name, uint16_t vlantag)
691 struct netmsg_vlan vmsg;
694 ASSERT_NOT_SERIALIZED(ifv->ifv_if.if_serializer);
696 bzero(&vmsg, sizeof(vmsg));
697 nmsg = &vmsg.nv_nmsg;
699 netmsg_init(nmsg, &curthread->td_msgport, 0, vlan_config_dispatch);
701 vmsg.nv_parent_name = parent_name;
702 vmsg.nv_vlantag = vlantag;
704 return lwkt_domsg(cpu_portfn(0), &nmsg->nm_lmsg, 0);
708 vlan_unlink_dispatch(struct netmsg *nmsg)
710 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)nmsg;
711 struct ifvlan *ifv = vmsg->nv_ifv;
712 struct vlan_entry *entry;
715 KASSERT(vmsg->nv_ifp_p->if_vlantrunks != NULL,
716 ("vlan trunk has not been initialized yet\n"));
717 entry = &ifv->ifv_entries[cpu];
720 LIST_REMOVE(entry, ifv_link);
723 vlan_forwardmsg(&nmsg->nm_lmsg, cpu + 1);
727 vlan_unlink(struct ifvlan *ifv, struct ifnet *ifp_p)
729 struct vlan_trunk *vlantrunks = ifp_p->if_vlantrunks;
730 struct netmsg_vlan vmsg;
733 /* Assert in netisr0 */
734 ASSERT_NOT_SERIALIZED(ifv->ifv_if.if_serializer);
736 KASSERT(ifp_p->if_vlantrunks != NULL,
737 ("vlan trunk has not been initialized yet\n"));
739 bzero(&vmsg, sizeof(vmsg));
740 nmsg = &vmsg.nv_nmsg;
742 netmsg_init(nmsg, &curthread->td_msgport, 0, vlan_unlink_dispatch);
744 vmsg.nv_ifp_p = ifp_p;
746 lwkt_domsg(ifa_portfn(0), &nmsg->nm_lmsg, 0);
749 if (LIST_EMPTY(&vlantrunks[mycpuid].vlan_list)) {
751 ifp_p->if_vlantrunks = NULL;
752 netmsg_service_sync();
753 kfree(vlantrunks, M_VLAN);
755 lwkt_serialize_enter(ifp_p->if_serializer);
756 kfree(ifp_p->if_vlantrunks, M_VLAN);
757 ifp_p->if_vlantrunks = NULL;
758 lwkt_serialize_exit(ifp_p->if_serializer);
765 vlan_unconfig_dispatch(struct netmsg *nmsg)
767 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)nmsg;
768 struct sockaddr_dl *sdl;
770 struct ifnet *ifp_p, *ifp;
773 /* Assert in netisr0 */
778 if (ifp->if_flags & IFF_UP)
781 lwkt_serialize_enter(ifp->if_serializer);
783 ifp->if_flags &= ~IFF_RUNNING;
786 * Save parent ifnet pointer and disconnect from parent.
788 * This is done early in this function, so input/output could
789 * know that we are disconnecting.
795 * Release vlan's serializer before reprogramming parent's
796 * multicast filter to avoid possible dead lock.
798 lwkt_serialize_exit(ifp->if_serializer);
802 * Since the interface is being unconfigured, we need to
803 * empty the list of multicast groups that we may have joined
804 * while we were alive from the parent's list.
806 vlan_clrmulti(ifv, ifp_p);
809 lwkt_serialize_enter(ifp->if_serializer);
811 ifp->if_mtu = ETHERMTU;
813 /* Clear our MAC address. */
814 sdl = IF_LLSOCKADDR(ifp);
815 sdl->sdl_type = IFT_ETHER;
816 sdl->sdl_alen = ETHER_ADDR_LEN;
817 bzero(LLADDR(sdl), ETHER_ADDR_LEN);
818 bzero(ifv->ifv_ac.ac_enaddr, ETHER_ADDR_LEN);
820 lwkt_serialize_exit(ifp->if_serializer);
822 /* Unlink vlan from parent's vlantrunk */
823 if (ifp_p != NULL && ifp_p->if_vlantrunks != NULL)
824 vlan_unlink(ifv, ifp_p);
827 lwkt_replymsg(&nmsg->nm_lmsg, error);
831 vlan_unconfig(struct ifvlan *ifv)
833 struct netmsg_vlan vmsg;
836 ASSERT_NOT_SERIALIZED(ifv->ifv_if.if_serializer);
838 bzero(&vmsg, sizeof(vmsg));
839 nmsg = &vmsg.nv_nmsg;
841 netmsg_init(nmsg, &curthread->td_msgport, 0, vlan_unconfig_dispatch);
844 return lwkt_domsg(cpu_portfn(0), &nmsg->nm_lmsg, 0);
848 vlan_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr)
850 struct ifvlan *ifv = ifp->if_softc;
851 struct ifreq *ifr = (struct ifreq *)data;
856 ASSERT_SERIALIZED(ifp->if_serializer);
862 lwkt_serialize_exit(ifp->if_serializer);
864 lwkt_serialize_enter(ifp_p->if_serializer);
865 error = ifp_p->if_ioctl(ifp_p, SIOCGIFMEDIA, data, cr);
866 lwkt_serialize_exit(ifp_p->if_serializer);
868 lwkt_serialize_enter(ifp->if_serializer);
869 /* Limit the result to the parent's current config. */
871 struct ifmediareq *ifmr;
873 ifmr = (struct ifmediareq *) data;
874 if (ifmr->ifm_count >= 1 && ifmr->ifm_ulist) {
876 error = copyout(&ifmr->ifm_current,
891 error = copyin(ifr->ifr_data, &vlr, sizeof vlr);
895 lwkt_serialize_exit(ifp->if_serializer);
896 if (vlr.vlr_parent[0] == '\0')
897 error = vlan_unconfig(ifv);
899 error = vlan_config(ifv, vlr.vlr_parent, vlr.vlr_tag);
900 lwkt_serialize_enter(ifp->if_serializer);
904 bzero(&vlr, sizeof(vlr));
906 strlcpy(vlr.vlr_parent, ifv->ifv_p->if_xname,
907 sizeof(vlr.vlr_parent));
908 vlr.vlr_tag = ifv->ifv_tag;
910 error = copyout(&vlr, ifr->ifr_data, sizeof vlr);
914 if (ifp->if_flags & IFF_UP)
917 ifp->if_flags &= ~IFF_RUNNING;
920 * We don't support promiscuous mode
921 * right now because it would require help from the
922 * underlying drivers, which hasn't been implemented.
924 if (ifr->ifr_flags & IFF_PROMISC) {
925 ifp->if_flags &= ~IFF_PROMISC;
932 lwkt_serialize_exit(ifp->if_serializer);
933 error = vlan_config_multi(ifv);
934 lwkt_serialize_enter(ifp->if_serializer);
938 error = ether_ioctl(ifp, cmd, data);
945 vlan_multi_dispatch(struct netmsg *nmsg)
947 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)nmsg;
948 struct ifvlan *ifv = vmsg->nv_ifv;
952 * If we don't have a parent, just remember the membership for
955 if (ifv->ifv_p != NULL)
956 error = vlan_setmulti(ifv, ifv->ifv_p);
957 lwkt_replymsg(&nmsg->nm_lmsg, error);
961 vlan_config_multi(struct ifvlan *ifv)
963 struct netmsg_vlan vmsg;
966 ASSERT_NOT_SERIALIZED(ifv->ifv_if.if_serializer);
968 bzero(&vmsg, sizeof(vmsg));
969 nmsg = &vmsg.nv_nmsg;
971 netmsg_init(nmsg, &curthread->td_msgport, 0, vlan_multi_dispatch);
974 return lwkt_domsg(cpu_portfn(0), &nmsg->nm_lmsg, 0);