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 1.42 2008/11/21 13:37:02 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.
50 #include <sys/param.h>
51 #include <sys/systm.h>
52 #include <sys/kernel.h>
53 #include <sys/malloc.h>
55 #include <sys/module.h>
56 #include <sys/queue.h>
57 #include <sys/socket.h>
58 #include <sys/sockio.h>
59 #include <sys/sysctl.h>
61 #include <sys/thread2.h>
64 #include <net/ethernet.h>
66 #include <net/if_arp.h>
67 #include <net/if_dl.h>
68 #include <net/if_types.h>
69 #include <net/ifq_var.h>
70 #include <net/if_clone.h>
71 #include <net/netmsg2.h>
74 #include <netinet/in.h>
75 #include <netinet/if_ether.h>
78 #include <net/vlan/if_vlan_var.h>
79 #include <net/vlan/if_vlan_ether.h>
83 struct vlan_mc_entry {
84 struct ether_addr mc_addr;
85 SLIST_ENTRY(vlan_mc_entry) mc_entries;
90 LIST_ENTRY(vlan_entry) ifv_link;
94 struct arpcom ifv_ac; /* make this an interface */
95 struct ifnet *ifv_p; /* parent inteface of this vlan */
98 uint16_t ifvm_proto; /* encapsulation ethertype */
99 uint16_t ifvm_tag; /* tag to apply on packets leaving if */
101 SLIST_HEAD(, vlan_mc_entry) vlan_mc_listhead;
102 LIST_ENTRY(ifvlan) ifv_list;
103 struct vlan_entry ifv_entries[1];
105 #define ifv_if ifv_ac.ac_if
106 #define ifv_tag ifv_mib.ifvm_tag
109 LIST_HEAD(, vlan_entry) vlan_list;
113 struct netmsg nv_nmsg;
114 struct ifvlan *nv_ifv;
115 struct ifnet *nv_ifp_p;
116 const char *nv_parent_name;
120 #define VLANNAME "vlan"
122 SYSCTL_DECL(_net_link);
123 SYSCTL_NODE(_net_link, IFT_L2VLAN, vlan, CTLFLAG_RW, 0, "IEEE 802.1Q VLAN");
124 SYSCTL_NODE(_net_link_vlan, PF_LINK, link, CTLFLAG_RW, 0, "for consistency");
126 static MALLOC_DEFINE(M_VLAN, "vlan", "802.1Q Virtual LAN Interface");
127 static LIST_HEAD(, ifvlan) ifv_list;
129 static int vlan_clone_create(struct if_clone *, int);
130 static void vlan_clone_destroy(struct ifnet *);
131 static void vlan_ifdetach(void *, struct ifnet *);
133 static void vlan_init(void *);
134 static void vlan_start(struct ifnet *);
135 static int vlan_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
136 static void vlan_input(struct mbuf *);
138 static void vlan_clrmulti(struct ifvlan *, struct ifnet *);
139 static int vlan_setmulti(struct ifvlan *, struct ifnet *);
140 static int vlan_config_multi(struct ifvlan *);
141 static int vlan_config(struct ifvlan *, const char *, uint16_t);
142 static int vlan_unconfig(struct ifvlan *);
143 static void vlan_link(struct ifvlan *, struct ifnet *);
144 static void vlan_unlink(struct ifvlan *, struct ifnet *);
146 static void vlan_config_dispatch(struct netmsg *);
147 static void vlan_unconfig_dispatch(struct netmsg *);
148 static void vlan_link_dispatch(struct netmsg *);
149 static void vlan_unlink_dispatch(struct netmsg *);
150 static void vlan_multi_dispatch(struct netmsg *);
151 static void vlan_ifdetach_dispatch(struct netmsg *);
153 static eventhandler_tag vlan_ifdetach_cookie;
154 static struct if_clone vlan_cloner =
155 IF_CLONE_INITIALIZER("vlan", vlan_clone_create, vlan_clone_destroy,
159 * Program our multicast filter. What we're actually doing is
160 * programming the multicast filter of the parent. This has the
161 * side effect of causing the parent interface to receive multicast
162 * traffic that it doesn't really want, which ends up being discarded
163 * later by the upper protocol layers. Unfortunately, there's no way
164 * to avoid this: there really is only one physical interface.
167 vlan_setmulti(struct ifvlan *ifv, struct ifnet *ifp_p)
169 struct ifmultiaddr *ifma, *rifma = NULL;
170 struct vlan_mc_entry *mc = NULL;
171 struct sockaddr_dl sdl;
172 struct ifnet *ifp = &ifv->ifv_if;
174 ASSERT_NOT_SERIALIZED(ifp->if_serializer);
177 * First, remove any existing filter entries.
179 vlan_clrmulti(ifv, ifp_p);
182 * Now program new ones.
184 bzero(&sdl, sizeof(sdl));
185 sdl.sdl_len = sizeof(sdl);
186 sdl.sdl_family = AF_LINK;
187 sdl.sdl_index = ifp_p->if_index;
188 sdl.sdl_type = IFT_ETHER;
189 sdl.sdl_alen = ETHER_ADDR_LEN;
191 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
194 if (ifma->ifma_addr->sa_family != AF_LINK)
198 mc = kmalloc(sizeof(struct vlan_mc_entry), M_VLAN, M_WAITOK);
199 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
200 &mc->mc_addr, ETHER_ADDR_LEN);
201 SLIST_INSERT_HEAD(&ifv->vlan_mc_listhead, mc, mc_entries);
203 /* Program the parent multicast filter */
204 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
205 LLADDR(&sdl), ETHER_ADDR_LEN);
206 error = if_addmulti(ifp_p, (struct sockaddr *)&sdl, &rifma);
214 vlan_clrmulti(struct ifvlan *ifv, struct ifnet *ifp_p)
216 struct vlan_mc_entry *mc;
217 struct sockaddr_dl sdl;
219 ASSERT_NOT_SERIALIZED(ifv->ifv_if.if_serializer);
221 bzero(&sdl, sizeof(sdl));
222 sdl.sdl_len = sizeof(sdl);
223 sdl.sdl_family = AF_LINK;
224 sdl.sdl_index = ifp_p->if_index;
225 sdl.sdl_type = IFT_ETHER;
226 sdl.sdl_alen = ETHER_ADDR_LEN;
228 while ((mc = SLIST_FIRST(&ifv->vlan_mc_listhead)) != NULL) {
229 bcopy(&mc->mc_addr, LLADDR(&sdl), ETHER_ADDR_LEN);
230 if_delmulti(ifp_p, (struct sockaddr *)&sdl); /* ignore error */
232 SLIST_REMOVE_HEAD(&ifv->vlan_mc_listhead, mc_entries);
238 vlan_modevent(module_t mod, int type, void *data)
242 LIST_INIT(&ifv_list);
243 vlan_input_p = vlan_input;
244 vlan_ifdetach_cookie =
245 EVENTHANDLER_REGISTER(ifnet_detach_event,
247 EVENTHANDLER_PRI_ANY);
248 if_clone_attach(&vlan_cloner);
252 if_clone_detach(&vlan_cloner);
256 * Make that all protocol threads see vlan_input_p change.
258 netmsg_service_sync();
260 EVENTHANDLER_DEREGISTER(ifnet_detach_event,
261 vlan_ifdetach_cookie);
262 while (!LIST_EMPTY(&ifv_list))
263 vlan_clone_destroy(&LIST_FIRST(&ifv_list)->ifv_if);
269 static moduledata_t vlan_mod = {
275 DECLARE_MODULE(if_vlan, vlan_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
278 vlan_ifdetach_dispatch(struct netmsg *nmsg)
280 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)nmsg;
281 struct ifnet *ifp_p = vmsg->nv_ifp_p;
282 struct vlan_trunk *vlantrunks, *trunk;
283 struct vlan_entry *ifve;
285 vlantrunks = ifp_p->if_vlantrunks;
286 if (vlantrunks == NULL)
288 trunk = &vlantrunks[mycpuid];
290 while (ifp_p->if_vlantrunks &&
291 (ifve = LIST_FIRST(&trunk->vlan_list)) != NULL)
292 vlan_unconfig(ifve->ifv);
294 lwkt_replymsg(&nmsg->nm_lmsg, 0);
298 vlan_ifdetach(void *arg __unused, struct ifnet *ifp)
300 struct netmsg_vlan vmsg;
303 ASSERT_NOT_SERIALIZED(ifp->if_serializer);
305 bzero(&vmsg, sizeof(vmsg));
306 nmsg = &vmsg.nv_nmsg;
308 netmsg_init(nmsg, &curthread->td_msgport, 0, vlan_ifdetach_dispatch);
311 lwkt_domsg(cpu_portfn(0), &nmsg->nm_lmsg, 0);
315 vlan_clone_create(struct if_clone *ifc, int unit)
321 vlan_size = sizeof(struct ifvlan)
322 + ((ncpus - 1) * sizeof(struct vlan_entry));
323 ifv = kmalloc(vlan_size, M_VLAN, M_WAITOK | M_ZERO);
324 SLIST_INIT(&ifv->vlan_mc_listhead);
325 for (i = 0; i < ncpus; ++i)
326 ifv->ifv_entries[i].ifv = ifv;
328 crit_enter(); /* XXX not MP safe */
329 LIST_INSERT_HEAD(&ifv_list, ifv, ifv_list);
334 if_initname(ifp, "vlan", unit);
335 /* NB: flags are not set here */
336 ifp->if_linkmib = &ifv->ifv_mib;
337 ifp->if_linkmiblen = sizeof ifv->ifv_mib;
338 /* NB: mtu is not set here */
340 ifp->if_init = vlan_init;
341 ifp->if_start = vlan_start;
342 ifp->if_ioctl = vlan_ioctl;
343 ifq_set_maxlen(&ifp->if_snd, ifqmaxlen);
344 ifq_set_ready(&ifp->if_snd);
345 ether_ifattach(ifp, ifv->ifv_ac.ac_enaddr, NULL);
346 /* Now undo some of the damage... */
347 ifp->if_data.ifi_type = IFT_L2VLAN;
348 ifp->if_data.ifi_hdrlen = EVL_ENCAPLEN;
354 vlan_clone_destroy(struct ifnet *ifp)
356 struct ifvlan *ifv = ifp->if_softc;
358 crit_enter(); /* XXX not MP safe */
359 LIST_REMOVE(ifv, ifv_list);
371 struct ifvlan *ifv = xsc;
372 struct ifnet *ifp = &ifv->ifv_if;
374 ASSERT_SERIALIZED(ifp->if_serializer);
376 if (ifv->ifv_p != NULL)
377 ifp->if_flags |= IFF_RUNNING;
381 vlan_start(struct ifnet *ifp)
383 struct ifvlan *ifv = ifp->if_softc;
384 struct ifnet *ifp_p = ifv->ifv_p;
387 ASSERT_SERIALIZED(ifp->if_serializer);
390 ifq_purge(&ifp->if_snd);
394 if ((ifp->if_flags & IFF_RUNNING) == 0)
398 struct netmsg_packet *nmp;
400 struct lwkt_port *port;
402 m = ifq_dequeue(&ifp->if_snd, NULL);
408 * Do not run parent's if_start() if the parent is not up,
409 * or parent's driver will cause a system crash.
411 if ((ifp_p->if_flags & (IFF_UP | IFF_RUNNING)) !=
412 (IFF_UP | IFF_RUNNING)) {
414 ifp->if_data.ifi_collisions++;
419 * We need some way to tell the interface where the packet
420 * came from so that it knows how to find the VLAN tag to
421 * use, so we set the ether_vlantag in the mbuf packet header
422 * to our vlan tag. We also set the M_VLANTAG flag in the
423 * mbuf to let the parent driver know that the ether_vlantag
426 m->m_pkthdr.ether_vlantag = ifv->ifv_tag;
427 m->m_flags |= M_VLANTAG;
429 nmp = &m->m_hdr.mh_netmsg;
430 nmsg = &nmp->nm_netmsg;
432 netmsg_init(nmsg, &netisr_apanic_rport, 0, vlan_start_dispatch);
434 nmsg->nm_lmsg.u.ms_resultp = ifp_p;
436 port = cpu_portfn(ifp_p->if_index % ncpus /* XXX */);
437 lwkt_sendmsg(port, &nmp->nm_netmsg.nm_lmsg);
443 vlan_input(struct mbuf *m)
445 struct ifvlan *ifv = NULL;
446 struct ifnet *rcvif, *ifp;
447 struct vlan_trunk *vlantrunks;
448 struct vlan_entry *entry;
450 rcvif = m->m_pkthdr.rcvif;
451 KKASSERT(m->m_flags & M_VLANTAG);
453 vlantrunks = rcvif->if_vlantrunks;
454 if (vlantrunks == NULL) {
460 crit_enter(); /* XXX Necessary? */
461 LIST_FOREACH(entry, &vlantrunks[mycpuid].vlan_list, ifv_link) {
462 if (entry->ifv->ifv_tag ==
463 EVL_VLANOFTAG(m->m_pkthdr.ether_vlantag)) {
471 * Packet is discarded if:
472 * - no corresponding vlan(4) interface
473 * - vlan(4) interface has not been completely set up yet,
474 * or is being destroyed (ifv->ifv_p != rcvif)
476 if (ifv == NULL || ifv->ifv_p != rcvif) {
484 * Clear M_VLANTAG, before the packet is handed to
487 m->m_flags &= ~M_VLANTAG;
489 /* Discard packet if interface is not up */
490 if (!(ifp->if_flags & IFF_UP)) {
495 /* Change receiving interface */
496 m->m_pkthdr.rcvif = ifp;
498 /* Update statistics */
500 ifp->if_ibytes += m->m_pkthdr.len;
501 if (m->m_flags & (M_MCAST | M_BCAST))
506 ether_input_oncpu(ifp, m);
510 vlan_link_dispatch(struct netmsg *nmsg)
512 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)nmsg;
513 struct ifvlan *ifv = vmsg->nv_ifv;
514 struct ifnet *ifp_p = vmsg->nv_ifp_p;
515 struct vlan_entry *entry;
516 struct vlan_trunk *vlantrunks, *trunk;
519 vlantrunks = ifp_p->if_vlantrunks;
520 KASSERT(vlantrunks != NULL,
521 ("vlan trunk has not been initialized yet\n"));
523 entry = &ifv->ifv_entries[cpu];
524 trunk = &vlantrunks[cpu];
527 LIST_INSERT_HEAD(&trunk->vlan_list, entry, ifv_link);
530 ifnet_forwardmsg(&nmsg->nm_lmsg, cpu + 1);
534 vlan_link(struct ifvlan *ifv, struct ifnet *ifp_p)
536 struct netmsg_vlan vmsg;
539 /* Assert in netisr0 */
540 ASSERT_NOT_SERIALIZED(ifv->ifv_if.if_serializer);
542 if (ifp_p->if_vlantrunks == NULL) {
543 struct vlan_trunk *vlantrunks;
546 vlantrunks = kmalloc(sizeof(*vlantrunks) * ncpus, M_VLAN,
548 for (i = 0; i < ncpus; ++i)
549 LIST_INIT(&vlantrunks[i].vlan_list);
551 ifp_p->if_vlantrunks = vlantrunks;
554 bzero(&vmsg, sizeof(vmsg));
555 nmsg = &vmsg.nv_nmsg;
557 netmsg_init(nmsg, &curthread->td_msgport, 0, vlan_link_dispatch);
559 vmsg.nv_ifp_p = ifp_p;
561 ifnet_domsg(&nmsg->nm_lmsg, 0);
565 vlan_config_dispatch(struct netmsg *nmsg)
567 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)nmsg;
569 struct ifnet *ifp_p, *ifp;
570 struct sockaddr_dl *sdl1, *sdl2;
573 /* Assert in netisr0 */
575 ifp_p = ifunit(vmsg->nv_parent_name);
581 if (ifp_p->if_data.ifi_type != IFT_ETHER) {
582 error = EPROTONOSUPPORT;
594 /* Link vlan into parent's vlantrunk */
595 vlan_link(ifv, ifp_p);
597 lwkt_serialize_enter(ifp->if_serializer);
599 ifv->ifv_tag = vmsg->nv_vlantag;
600 if (ifp_p->if_capenable & IFCAP_VLAN_MTU)
601 ifp->if_mtu = ifp_p->if_mtu;
603 ifp->if_mtu = ifp_p->if_data.ifi_mtu - EVL_ENCAPLEN;
606 * Copy only a selected subset of flags from the parent.
607 * Other flags are none of our business.
609 ifp->if_flags = (ifp_p->if_flags &
610 (IFF_BROADCAST | IFF_MULTICAST | IFF_SIMPLEX | IFF_POINTOPOINT));
613 * Set up our ``Ethernet address'' to reflect the underlying
614 * physical interface's.
616 sdl1 = IF_LLSOCKADDR(ifp);
617 sdl2 = IF_LLSOCKADDR(ifp_p);
618 sdl1->sdl_type = IFT_ETHER;
619 sdl1->sdl_alen = ETHER_ADDR_LEN;
620 bcopy(LLADDR(sdl2), LLADDR(sdl1), ETHER_ADDR_LEN);
621 bcopy(LLADDR(sdl2), ifv->ifv_ac.ac_enaddr, ETHER_ADDR_LEN);
624 * Release vlan's serializer before reprogramming parent's
625 * multicast filter to avoid possible dead lock.
627 lwkt_serialize_exit(ifp->if_serializer);
630 * Configure multicast addresses that may already be
631 * joined on the vlan device.
633 vlan_setmulti(ifv, ifp_p);
636 * Connect to parent after everything have been set up,
637 * so input/output could know that vlan is ready to go
642 lwkt_replymsg(&nmsg->nm_lmsg, error);
646 vlan_config(struct ifvlan *ifv, const char *parent_name, uint16_t vlantag)
648 struct netmsg_vlan vmsg;
651 ASSERT_NOT_SERIALIZED(ifv->ifv_if.if_serializer);
653 bzero(&vmsg, sizeof(vmsg));
654 nmsg = &vmsg.nv_nmsg;
656 netmsg_init(nmsg, &curthread->td_msgport, 0, vlan_config_dispatch);
658 vmsg.nv_parent_name = parent_name;
659 vmsg.nv_vlantag = vlantag;
661 return lwkt_domsg(cpu_portfn(0), &nmsg->nm_lmsg, 0);
665 vlan_unlink_dispatch(struct netmsg *nmsg)
667 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)nmsg;
668 struct ifvlan *ifv = vmsg->nv_ifv;
669 struct vlan_entry *entry;
672 KASSERT(vmsg->nv_ifp_p->if_vlantrunks != NULL,
673 ("vlan trunk has not been initialized yet\n"));
674 entry = &ifv->ifv_entries[cpu];
677 LIST_REMOVE(entry, ifv_link);
680 ifnet_forwardmsg(&nmsg->nm_lmsg, cpu + 1);
684 vlan_unlink(struct ifvlan *ifv, struct ifnet *ifp_p)
686 struct vlan_trunk *vlantrunks = ifp_p->if_vlantrunks;
687 struct netmsg_vlan vmsg;
690 /* Assert in netisr0 */
691 ASSERT_NOT_SERIALIZED(ifv->ifv_if.if_serializer);
693 KASSERT(ifp_p->if_vlantrunks != NULL,
694 ("vlan trunk has not been initialized yet\n"));
696 bzero(&vmsg, sizeof(vmsg));
697 nmsg = &vmsg.nv_nmsg;
699 netmsg_init(nmsg, &curthread->td_msgport, 0, vlan_unlink_dispatch);
701 vmsg.nv_ifp_p = ifp_p;
703 ifnet_domsg(&nmsg->nm_lmsg, 0);
706 if (LIST_EMPTY(&vlantrunks[mycpuid].vlan_list)) {
707 ifp_p->if_vlantrunks = NULL;
710 * Make that all protocol threads see if_vlantrunks change.
712 netmsg_service_sync();
713 kfree(vlantrunks, M_VLAN);
719 vlan_unconfig_dispatch(struct netmsg *nmsg)
721 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)nmsg;
722 struct sockaddr_dl *sdl;
724 struct ifnet *ifp_p, *ifp;
727 /* Assert in netisr0 */
732 if (ifp->if_flags & IFF_UP)
735 lwkt_serialize_enter(ifp->if_serializer);
737 ifp->if_flags &= ~IFF_RUNNING;
740 * Save parent ifnet pointer and disconnect from parent.
742 * This is done early in this function, so input/output could
743 * know that we are disconnecting.
749 * Release vlan's serializer before reprogramming parent's
750 * multicast filter to avoid possible dead lock.
752 lwkt_serialize_exit(ifp->if_serializer);
756 * Since the interface is being unconfigured, we need to
757 * empty the list of multicast groups that we may have joined
758 * while we were alive from the parent's list.
760 vlan_clrmulti(ifv, ifp_p);
763 lwkt_serialize_enter(ifp->if_serializer);
765 ifp->if_mtu = ETHERMTU;
767 /* Clear our MAC address. */
768 sdl = IF_LLSOCKADDR(ifp);
769 sdl->sdl_type = IFT_ETHER;
770 sdl->sdl_alen = ETHER_ADDR_LEN;
771 bzero(LLADDR(sdl), ETHER_ADDR_LEN);
772 bzero(ifv->ifv_ac.ac_enaddr, ETHER_ADDR_LEN);
774 lwkt_serialize_exit(ifp->if_serializer);
776 /* Unlink vlan from parent's vlantrunk */
777 if (ifp_p != NULL && ifp_p->if_vlantrunks != NULL)
778 vlan_unlink(ifv, ifp_p);
781 lwkt_replymsg(&nmsg->nm_lmsg, error);
785 vlan_unconfig(struct ifvlan *ifv)
787 struct netmsg_vlan vmsg;
790 ASSERT_NOT_SERIALIZED(ifv->ifv_if.if_serializer);
792 bzero(&vmsg, sizeof(vmsg));
793 nmsg = &vmsg.nv_nmsg;
795 netmsg_init(nmsg, &curthread->td_msgport, 0, vlan_unconfig_dispatch);
798 return lwkt_domsg(cpu_portfn(0), &nmsg->nm_lmsg, 0);
802 vlan_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr)
804 struct ifvlan *ifv = ifp->if_softc;
805 struct ifreq *ifr = (struct ifreq *)data;
810 ASSERT_SERIALIZED(ifp->if_serializer);
817 * Release vlan interface's serializer to void
818 * possible dead lock.
820 lwkt_serialize_exit(ifp->if_serializer);
822 lwkt_serialize_enter(ifp_p->if_serializer);
823 error = ifp_p->if_ioctl(ifp_p, SIOCGIFMEDIA, data, cr);
824 lwkt_serialize_exit(ifp_p->if_serializer);
826 lwkt_serialize_enter(ifp->if_serializer);
828 if (ifv->ifv_p == NULL && ifv->ifv_p != ifp_p) {
830 * We are disconnected from the original
831 * parent interface or the parent interface
832 * is changed, after vlan interface's
833 * serializer is released.
838 /* Limit the result to the parent's current config. */
840 struct ifmediareq *ifmr;
842 ifmr = (struct ifmediareq *) data;
843 if (ifmr->ifm_count >= 1 && ifmr->ifm_ulist) {
845 error = copyout(&ifmr->ifm_current,
860 error = copyin(ifr->ifr_data, &vlr, sizeof vlr);
864 lwkt_serialize_exit(ifp->if_serializer);
865 if (vlr.vlr_parent[0] == '\0')
866 error = vlan_unconfig(ifv);
868 error = vlan_config(ifv, vlr.vlr_parent, vlr.vlr_tag);
869 lwkt_serialize_enter(ifp->if_serializer);
873 bzero(&vlr, sizeof(vlr));
875 strlcpy(vlr.vlr_parent, ifv->ifv_p->if_xname,
876 sizeof(vlr.vlr_parent));
877 vlr.vlr_tag = ifv->ifv_tag;
879 error = copyout(&vlr, ifr->ifr_data, sizeof vlr);
883 if (ifp->if_flags & IFF_UP)
886 ifp->if_flags &= ~IFF_RUNNING;
889 * We don't support promiscuous mode
890 * right now because it would require help from the
891 * underlying drivers, which hasn't been implemented.
893 if (ifr->ifr_flags & IFF_PROMISC) {
894 ifp->if_flags &= ~IFF_PROMISC;
901 lwkt_serialize_exit(ifp->if_serializer);
902 error = vlan_config_multi(ifv);
903 lwkt_serialize_enter(ifp->if_serializer);
907 error = ether_ioctl(ifp, cmd, data);
914 vlan_multi_dispatch(struct netmsg *nmsg)
916 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)nmsg;
917 struct ifvlan *ifv = vmsg->nv_ifv;
921 * If we don't have a parent, just remember the membership for
924 if (ifv->ifv_p != NULL)
925 error = vlan_setmulti(ifv, ifv->ifv_p);
926 lwkt_replymsg(&nmsg->nm_lmsg, error);
930 vlan_config_multi(struct ifvlan *ifv)
932 struct netmsg_vlan vmsg;
935 ASSERT_NOT_SERIALIZED(ifv->ifv_if.if_serializer);
937 bzero(&vmsg, sizeof(vmsg));
938 nmsg = &vmsg.nv_nmsg;
940 netmsg_init(nmsg, &curthread->td_msgport, 0, vlan_multi_dispatch);
943 return lwkt_domsg(cpu_portfn(0), &nmsg->nm_lmsg, 0);