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 $
33 * if_vlan.c - pseudo-device driver for IEEE 802.1Q virtual LANs.
34 * Might be extended some day to also handle IEEE 802.1p priority
35 * tagging. This is sort of sneaky in the implementation, since
36 * we need to pretend to be enough of an Ethernet implementation
37 * to make arp work. The way we do this is by telling everyone
38 * that we are an Ethernet, and then catch the packets that
39 * ether_output() left on our output queue queue when it calls
40 * if_start(), rewrite them for use by the real outgoing interface,
41 * and ask it to send them.
44 * Note about vlan's MP safe approach:
46 * - All configuration operation, e.g. config, unconfig and change flags,
47 * is serialized by netisr0; not by vlan's serializer
49 * - Parent interface's trunk and vlans are linked in the following
52 * +--------------+--------+--------+--------+--------+
53 * | parent ifnet |trunk[0]|trunk[1]|trunk[2]|trunk[3]|
54 * +--------------+--------+--------+--------+--------+
57 * +--------------+--------+--------+--------+--------+
58 * | vlan ifnet |entry[0]|entry[1]|entry[2]|entry[3]|
59 * +--------------+--------+--------+--------+--------+
62 * +--------------+--------+--------+--------+--------+
63 * | vlan ifnet |entry[0]|entry[1]|entry[2]|entry[3]|
64 * +--------------+--------+--------+--------+--------+
66 * - Vlan is linked/unlinked onto parent interface's trunk using following
71 * netisr0 <----------------------------------------------+
77 * : fwdmsg fwdmsg fwdmsg |
78 * :-----------> netisr1 --------> netisr2 --------> netisr3
79 * (link/unlink) (link/unlink) (link/unlink)
81 * - Parent interface's trunk is destroyed in the following lockless way:
83 * old_trunk = ifp->if_vlantrunks;
84 * ifp->if_vlantrunks = NULL;
85 * netmsg_service_sync();
89 * Since all of the accessing of if_vlantrunks only happens in network
90 * threads (percpu netisr and ifnet threads), after netmsg_service_sync()
91 * the network threads are promised to see only NULL if_vlantrunks; we
92 * are safe to free the "to be destroyed" parent interface's trunk
101 #include <sys/param.h>
102 #include <sys/systm.h>
103 #include <sys/kernel.h>
104 #include <sys/malloc.h>
105 #include <sys/mbuf.h>
106 #include <sys/module.h>
107 #include <sys/queue.h>
108 #include <sys/socket.h>
109 #include <sys/sockio.h>
110 #include <sys/sysctl.h>
112 #include <sys/thread2.h>
115 #include <net/ethernet.h>
117 #include <net/if_arp.h>
118 #include <net/if_dl.h>
119 #include <net/if_types.h>
120 #include <net/ifq_var.h>
121 #include <net/if_clone.h>
122 #include <net/netmsg2.h>
123 #include <net/netisr2.h>
126 #include <netinet/in.h>
127 #include <netinet/if_ether.h>
130 #include <net/vlan/if_vlan_var.h>
131 #include <net/vlan/if_vlan_ether.h>
135 struct vlan_mc_entry {
136 struct ether_addr mc_addr;
137 SLIST_ENTRY(vlan_mc_entry) mc_entries;
142 LIST_ENTRY(vlan_entry) ifv_link;
146 struct arpcom ifv_ac; /* make this an interface */
147 struct ifnet *ifv_p; /* parent inteface of this vlan */
148 int ifv_pflags; /* special flags we have set on parent */
151 uint16_t ifvm_proto; /* encapsulation ethertype */
152 uint16_t ifvm_tag; /* tag to apply on packets leaving if */
154 SLIST_HEAD(, vlan_mc_entry) vlan_mc_listhead;
155 LIST_ENTRY(ifvlan) ifv_list;
156 struct vlan_entry ifv_entries[1];
158 #define ifv_if ifv_ac.ac_if
159 #define ifv_tag ifv_mib.ifvm_tag
162 LIST_HEAD(, vlan_entry) vlan_list;
166 struct netmsg_base base;
167 struct ifvlan *nv_ifv;
168 struct ifnet *nv_ifp_p;
169 const char *nv_parent_name;
173 #define VLANNAME "vlan"
175 SYSCTL_DECL(_net_link);
176 SYSCTL_NODE(_net_link, IFT_L2VLAN, vlan, CTLFLAG_RW, 0, "IEEE 802.1Q VLAN");
177 SYSCTL_NODE(_net_link_vlan, PF_LINK, link, CTLFLAG_RW, 0, "for consistency");
179 static MALLOC_DEFINE(M_VLAN, "vlan", "802.1Q Virtual LAN Interface");
180 static LIST_HEAD(, ifvlan) ifv_list;
182 static int vlan_clone_create(struct if_clone *, int, caddr_t, caddr_t);
183 static int vlan_clone_destroy(struct ifnet *);
184 static void vlan_ifdetach(void *, struct ifnet *);
186 static void vlan_init(void *);
187 static void vlan_start(struct ifnet *, struct ifaltq_subque *);
188 static int vlan_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
189 static void vlan_input(struct mbuf *);
191 static int vlan_setflags(struct ifvlan *, struct ifnet *, int);
192 static int vlan_setflag(struct ifvlan *, struct ifnet *, int, int,
193 int (*)(struct ifnet *, int));
194 static int vlan_config_flags(struct ifvlan *ifv);
195 static void vlan_clrmulti(struct ifvlan *, struct ifnet *);
196 static int vlan_setmulti(struct ifvlan *, struct ifnet *);
197 static int vlan_config_multi(struct ifvlan *);
198 static int vlan_config(struct ifvlan *, const char *, uint16_t);
199 static int vlan_unconfig(struct ifvlan *);
200 static void vlan_link(struct ifvlan *, struct ifnet *);
201 static void vlan_unlink(struct ifvlan *, struct ifnet *);
203 static void vlan_config_dispatch(netmsg_t);
204 static void vlan_unconfig_dispatch(netmsg_t);
205 static void vlan_link_dispatch(netmsg_t);
206 static void vlan_unlink_dispatch(netmsg_t);
207 static void vlan_multi_dispatch(netmsg_t);
208 static void vlan_flags_dispatch(netmsg_t);
209 static void vlan_ifdetach_dispatch(netmsg_t);
211 /* Special flags we should propagate to parent */
214 int (*func)(struct ifnet *, int);
216 { IFF_PROMISC, ifpromisc },
217 { IFF_ALLMULTI, if_allmulti },
221 static eventhandler_tag vlan_ifdetach_cookie;
222 static struct if_clone vlan_cloner =
223 IF_CLONE_INITIALIZER("vlan", vlan_clone_create, vlan_clone_destroy,
227 * Handle IFF_* flags that require certain changes on the parent:
228 * if "set" is true, update parent's flags respective to our if_flags;
229 * if "set" is false, forcedly clear the flags set on parent.
232 vlan_setflags(struct ifvlan *ifv, struct ifnet *ifp_p, int set)
236 ASSERT_IFNET_NOT_SERIALIZED_ALL(&ifv->ifv_if);
238 for (i = 0; vlan_pflags[i].func != NULL; i++) {
239 error = vlan_setflag(ifv, ifp_p, vlan_pflags[i].flag,
240 set, vlan_pflags[i].func);
247 /* Handle a reference counted flag that should be set on the parent as well */
249 vlan_setflag(struct ifvlan *ifv, struct ifnet *ifp_p, int flag, int set,
250 int (*func)(struct ifnet *, int))
252 struct ifnet *ifp = &ifv->ifv_if;
255 ASSERT_IFNET_NOT_SERIALIZED_ALL(ifp);
257 ifv_flag = set ? (ifp->if_flags & flag) : 0;
260 * See if recorded parent's status is different from what
261 * we want it to be. If it is, flip it. We record parent's
262 * status in ifv_pflags so that we won't clear parent's flag
263 * we haven't set. In fact, we don't clear or set parent's
264 * flags directly, but get or release references to them.
265 * That's why we can be sure that recorded flags still are
266 * in accord with actual parent's flags.
268 if (ifv_flag != (ifv->ifv_pflags & flag)) {
269 error = func(ifp_p, ifv_flag);
272 ifv->ifv_pflags &= ~flag;
273 ifv->ifv_pflags |= ifv_flag;
279 * Program our multicast filter. What we're actually doing is
280 * programming the multicast filter of the parent. This has the
281 * side effect of causing the parent interface to receive multicast
282 * traffic that it doesn't really want, which ends up being discarded
283 * later by the upper protocol layers. Unfortunately, there's no way
284 * to avoid this: there really is only one physical interface.
287 vlan_setmulti(struct ifvlan *ifv, struct ifnet *ifp_p)
289 struct ifmultiaddr *ifma;
290 struct vlan_mc_entry *mc = NULL;
291 struct sockaddr_dl sdl;
292 struct ifnet *ifp = &ifv->ifv_if;
294 ASSERT_IFNET_NOT_SERIALIZED_ALL(ifp);
297 * First, remove any existing filter entries.
299 vlan_clrmulti(ifv, ifp_p);
302 * Save the filter entries to be added to parent.
304 * TODO: need ifnet_serialize_main
306 ifnet_serialize_all(ifp);
307 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
308 if (ifma->ifma_addr->sa_family != AF_LINK)
312 mc = kmalloc(sizeof(struct vlan_mc_entry), M_VLAN, M_WAITOK);
313 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
314 &mc->mc_addr, ETHER_ADDR_LEN);
315 SLIST_INSERT_HEAD(&ifv->vlan_mc_listhead, mc, mc_entries);
317 ifnet_deserialize_all(ifp);
320 * Now program new ones.
322 bzero(&sdl, sizeof(sdl));
323 sdl.sdl_len = sizeof(sdl);
324 sdl.sdl_family = AF_LINK;
325 sdl.sdl_index = ifp_p->if_index;
326 sdl.sdl_type = IFT_ETHER;
327 sdl.sdl_alen = ETHER_ADDR_LEN;
330 * Program the parent multicast filter
332 SLIST_FOREACH(mc, &ifv->vlan_mc_listhead, mc_entries) {
335 bcopy(&mc->mc_addr, LLADDR(&sdl), ETHER_ADDR_LEN);
336 error = if_addmulti(ifp_p, (struct sockaddr *)&sdl, NULL);
338 /* XXX probably should keep going */
346 vlan_clrmulti(struct ifvlan *ifv, struct ifnet *ifp_p)
348 struct vlan_mc_entry *mc;
349 struct sockaddr_dl sdl;
351 ASSERT_IFNET_NOT_SERIALIZED_ALL(&ifv->ifv_if);
353 bzero(&sdl, sizeof(sdl));
354 sdl.sdl_len = sizeof(sdl);
355 sdl.sdl_family = AF_LINK;
356 sdl.sdl_index = ifp_p->if_index;
357 sdl.sdl_type = IFT_ETHER;
358 sdl.sdl_alen = ETHER_ADDR_LEN;
360 while ((mc = SLIST_FIRST(&ifv->vlan_mc_listhead)) != NULL) {
361 bcopy(&mc->mc_addr, LLADDR(&sdl), ETHER_ADDR_LEN);
362 if_delmulti(ifp_p, (struct sockaddr *)&sdl); /* ignore error */
364 SLIST_REMOVE_HEAD(&ifv->vlan_mc_listhead, mc_entries);
370 vlan_modevent(module_t mod, int type, void *data)
374 LIST_INIT(&ifv_list);
375 vlan_input_p = vlan_input;
376 vlan_ifdetach_cookie =
377 EVENTHANDLER_REGISTER(ifnet_detach_event,
379 EVENTHANDLER_PRI_ANY);
380 if_clone_attach(&vlan_cloner);
384 if_clone_detach(&vlan_cloner);
388 * Make sure that all protocol threads see vlan_input_p change.
390 netmsg_service_sync();
392 EVENTHANDLER_DEREGISTER(ifnet_detach_event,
393 vlan_ifdetach_cookie);
394 while (!LIST_EMPTY(&ifv_list))
395 vlan_clone_destroy(&LIST_FIRST(&ifv_list)->ifv_if);
401 static moduledata_t vlan_mod = {
407 DECLARE_MODULE(if_vlan, vlan_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
410 vlan_ifdetach_dispatch(netmsg_t msg)
412 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)msg;
413 struct ifnet *ifp_p = vmsg->nv_ifp_p;
414 struct vlan_trunk *vlantrunks, *trunk;
415 struct vlan_entry *ifve;
417 vlantrunks = ifp_p->if_vlantrunks;
418 if (vlantrunks == NULL)
420 trunk = &vlantrunks[mycpuid];
422 while (ifp_p->if_vlantrunks &&
423 (ifve = LIST_FIRST(&trunk->vlan_list)) != NULL)
425 vlan_unconfig(ifve->ifv);
428 lwkt_replymsg(&vmsg->base.lmsg, 0);
432 vlan_ifdetach(void *arg __unused, struct ifnet *ifp)
434 struct netmsg_vlan vmsg;
436 ASSERT_IFNET_NOT_SERIALIZED_ALL(ifp);
438 bzero(&vmsg, sizeof(vmsg));
440 netmsg_init(&vmsg.base, NULL, &curthread->td_msgport,
441 0, vlan_ifdetach_dispatch);
444 lwkt_domsg(netisr_cpuport(0), &vmsg.base.lmsg, 0);
448 vlan_clone_create(struct if_clone *ifc, int unit,
449 caddr_t params __unused, caddr_t data __unused)
455 vlan_size = sizeof(struct ifvlan)
456 + ((netisr_ncpus - 1) * sizeof(struct vlan_entry));
457 ifv = kmalloc(vlan_size, M_VLAN, M_WAITOK | M_ZERO);
458 SLIST_INIT(&ifv->vlan_mc_listhead);
459 for (i = 0; i < netisr_ncpus; ++i)
460 ifv->ifv_entries[i].ifv = ifv;
462 crit_enter(); /* XXX not MP safe */
463 LIST_INSERT_HEAD(&ifv_list, ifv, ifv_list);
468 if_initname(ifp, "vlan", unit);
469 /* NB: flags are not set here */
470 ifp->if_linkmib = &ifv->ifv_mib;
471 ifp->if_linkmiblen = sizeof ifv->ifv_mib;
472 /* NB: mtu is not set here */
474 ifp->if_init = vlan_init;
475 ifp->if_start = vlan_start;
476 ifp->if_ioctl = vlan_ioctl;
477 ifq_set_maxlen(&ifp->if_snd, ifqmaxlen);
478 ifq_set_ready(&ifp->if_snd);
479 ether_ifattach(ifp, ifv->ifv_ac.ac_enaddr, NULL);
480 /* Now undo some of the damage... */
481 ifp->if_data.ifi_type = IFT_L2VLAN;
482 ifp->if_data.ifi_hdrlen = EVL_ENCAPLEN;
488 vlan_clone_destroy(struct ifnet *ifp)
490 struct ifvlan *ifv = ifp->if_softc;
492 crit_enter(); /* XXX not MP safe */
493 LIST_REMOVE(ifv, ifv_list);
507 struct ifvlan *ifv = xsc;
508 struct ifnet *ifp = &ifv->ifv_if;
510 ASSERT_IFNET_SERIALIZED_ALL(ifp);
512 if (ifv->ifv_p != NULL)
513 ifp->if_flags |= IFF_RUNNING;
517 vlan_start(struct ifnet *ifp, struct ifaltq_subque *ifsq)
519 struct ifvlan *ifv = ifp->if_softc;
520 struct ifnet *ifp_p = ifv->ifv_p;
524 ASSERT_ALTQ_SQ_DEFAULT(ifp, ifsq);
525 ASSERT_ALTQ_SQ_SERIALIZED_HW(ifsq);
532 if ((ifp->if_flags & IFF_RUNNING) == 0)
535 p_port = netisr_cpuport(
536 ifsq_get_cpuid(ifq_get_subq_default(&ifp_p->if_snd)));
538 struct netmsg_packet *nmp;
540 m = ifsq_dequeue(ifsq);
546 * Do not run parent's if_start() if the parent is not up,
547 * or parent's driver will cause a system crash.
549 if ((ifp_p->if_flags & (IFF_UP | IFF_RUNNING)) !=
550 (IFF_UP | IFF_RUNNING)) {
552 IFNET_STAT_INC(ifp, collisions, 1);
557 * We need some way to tell the interface where the packet
558 * came from so that it knows how to find the VLAN tag to
559 * use, so we set the ether_vlantag in the mbuf packet header
560 * to our vlan tag. We also set the M_VLANTAG flag in the
561 * mbuf to let the parent driver know that the ether_vlantag
564 m->m_pkthdr.ether_vlantag = ifv->ifv_tag;
565 m->m_flags |= M_VLANTAG;
567 nmp = &m->m_hdr.mh_netmsg;
569 netmsg_init(&nmp->base, NULL, &netisr_apanic_rport,
570 0, vlan_start_dispatch);
572 nmp->base.lmsg.u.ms_resultp = ifp_p;
574 lwkt_sendmsg(p_port, &nmp->base.lmsg);
575 IFNET_STAT_INC(ifp, opackets, 1);
580 vlan_input(struct mbuf *m)
582 struct ifvlan *ifv = NULL;
584 struct vlan_trunk *vlantrunks;
585 struct vlan_entry *entry;
588 ASSERT_NETISR_NCPUS(cpuid);
590 rcvif = m->m_pkthdr.rcvif;
591 KKASSERT(m->m_flags & M_VLANTAG);
593 /* Make sure 'vlantrunks' is really used. */
594 vlantrunks = rcvif->if_vlantrunks;
596 if (vlantrunks == NULL) {
597 IFNET_STAT_INC(rcvif, noproto, 1);
603 * Locate the associated vlan
605 LIST_FOREACH(entry, &vlantrunks[cpuid].vlan_list, ifv_link) {
606 if (entry->ifv->ifv_tag ==
607 EVL_VLANOFTAG(m->m_pkthdr.ether_vlantag))
615 * Discard packets to unknown vlans, if the vlan interface is
616 * not completely initialized yet, or it is being destroyed.
618 if (ifv == NULL || ifv->ifv_p != rcvif) {
619 IFNET_STAT_INC(rcvif, noproto, 1);
625 * Clear M_VLANTAG, then hand the vlan-stripped packet to the
628 m->m_flags &= ~M_VLANTAG;
630 ether_reinput_oncpu(&ifv->ifv_if, m, REINPUT_RUNBPF);
634 vlan_link_dispatch(netmsg_t msg)
636 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)msg;
637 struct ifvlan *ifv = vmsg->nv_ifv;
638 struct ifnet *ifp_p = vmsg->nv_ifp_p;
639 struct vlan_entry *entry;
640 struct vlan_trunk *vlantrunks, *trunk;
643 vlantrunks = ifp_p->if_vlantrunks;
644 KASSERT(vlantrunks != NULL,
645 ("vlan trunk has not been initialized yet"));
647 entry = &ifv->ifv_entries[cpu];
648 trunk = &vlantrunks[cpu];
651 * Critical section protects per-cpu list
654 LIST_INSERT_HEAD(&trunk->vlan_list, entry, ifv_link);
657 netisr_forwardmsg(&vmsg->base, cpu + 1);
661 vlan_link(struct ifvlan *ifv, struct ifnet *ifp_p)
663 struct netmsg_vlan vmsg;
665 /* Assert in netisr0 */
666 ASSERT_IFNET_NOT_SERIALIZED_ALL(&ifv->ifv_if);
668 if (ifp_p->if_vlantrunks == NULL) {
669 struct vlan_trunk *vlantrunks;
672 vlantrunks = kmalloc(sizeof(*vlantrunks) * netisr_ncpus,
675 for (i = 0; i < netisr_ncpus; ++i)
676 LIST_INIT(&vlantrunks[i].vlan_list);
678 ifp_p->if_vlantrunks = vlantrunks;
681 bzero(&vmsg, sizeof(vmsg));
683 netmsg_init(&vmsg.base, NULL, &curthread->td_msgport,
684 0, vlan_link_dispatch);
686 vmsg.nv_ifp_p = ifp_p;
688 netisr_domsg(&vmsg.base, 0);
692 vlan_config_dispatch(netmsg_t msg)
694 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)msg;
696 struct ifnet *ifp_p, *ifp;
697 struct sockaddr_dl *sdl1, *sdl2;
700 /* Assert in netisr0 */
702 ifp_p = ifunit_netisr(vmsg->nv_parent_name);
708 if (ifp_p->if_data.ifi_type != IFT_ETHER) {
709 error = EPROTONOSUPPORT;
721 /* Link vlan into parent's vlantrunk */
722 vlan_link(ifv, ifp_p);
724 ifnet_serialize_all(ifp);
726 ifv->ifv_tag = vmsg->nv_vlantag;
727 if (ifp_p->if_capenable & IFCAP_VLAN_MTU)
728 ifp->if_mtu = ifp_p->if_mtu;
730 ifp->if_mtu = ifp_p->if_data.ifi_mtu - EVL_ENCAPLEN;
733 * Copy only a selected subset of flags from the parent.
734 * Other flags are none of our business.
736 #define VLAN_INHERIT_FLAGS (IFF_BROADCAST | IFF_MULTICAST | \
737 IFF_SIMPLEX | IFF_POINTOPOINT)
739 ifp->if_flags &= ~VLAN_INHERIT_FLAGS;
740 ifp->if_flags |= (ifp_p->if_flags & VLAN_INHERIT_FLAGS);
742 #undef VLAN_INHERIT_FLAGS
745 * Set up our ``Ethernet address'' to reflect the underlying
746 * physical interface's.
748 sdl1 = IF_LLSOCKADDR(ifp);
749 sdl2 = IF_LLSOCKADDR(ifp_p);
750 sdl1->sdl_type = IFT_ETHER;
751 sdl1->sdl_alen = ETHER_ADDR_LEN;
752 bcopy(LLADDR(sdl2), LLADDR(sdl1), ETHER_ADDR_LEN);
753 bcopy(LLADDR(sdl2), ifv->ifv_ac.ac_enaddr, ETHER_ADDR_LEN);
756 * Release vlan's serializer before reprogramming parent's
757 * multicast filter to avoid possible dead lock.
759 ifnet_deserialize_all(ifp);
762 * Configure multicast addresses that may already be
763 * joined on the vlan device.
765 vlan_setmulti(ifv, ifp_p);
768 * Set flags on the parent, if necessary.
770 vlan_setflags(ifv, ifp_p, 1);
773 * Connect to parent after everything have been set up,
774 * so input/output could know that vlan is ready to go
779 lwkt_replymsg(&vmsg->base.lmsg, error);
783 vlan_config(struct ifvlan *ifv, const char *parent_name, uint16_t vlantag)
785 struct netmsg_vlan vmsg;
787 ASSERT_IFNET_NOT_SERIALIZED_ALL(&ifv->ifv_if);
789 bzero(&vmsg, sizeof(vmsg));
791 netmsg_init(&vmsg.base, NULL, &curthread->td_msgport,
792 0, vlan_config_dispatch);
794 vmsg.nv_parent_name = parent_name;
795 vmsg.nv_vlantag = vlantag;
797 return lwkt_domsg(netisr_cpuport(0), &vmsg.base.lmsg, 0);
801 vlan_unlink_dispatch(netmsg_t msg)
803 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)msg;
804 struct ifvlan *ifv = vmsg->nv_ifv;
805 struct vlan_entry *entry;
808 KASSERT(vmsg->nv_ifp_p->if_vlantrunks != NULL,
809 ("vlan trunk has not been initialized yet"));
810 entry = &ifv->ifv_entries[cpu];
813 LIST_REMOVE(entry, ifv_link);
816 netisr_forwardmsg(&vmsg->base, cpu + 1);
820 vlan_unlink(struct ifvlan *ifv, struct ifnet *ifp_p)
822 struct vlan_trunk *vlantrunks = ifp_p->if_vlantrunks;
823 struct netmsg_vlan vmsg;
825 /* Assert in netisr0 */
826 ASSERT_IFNET_NOT_SERIALIZED_ALL(&ifv->ifv_if);
828 KASSERT(ifp_p->if_vlantrunks != NULL,
829 ("vlan trunk has not been initialized yet"));
831 bzero(&vmsg, sizeof(vmsg));
833 netmsg_init(&vmsg.base, NULL, &curthread->td_msgport,
834 0, vlan_unlink_dispatch);
836 vmsg.nv_ifp_p = ifp_p;
838 netisr_domsg(&vmsg.base, 0);
841 if (LIST_EMPTY(&vlantrunks[mycpuid].vlan_list)) {
842 ifp_p->if_vlantrunks = NULL;
845 * Make sure that all protocol threads see if_vlantrunks change.
847 netmsg_service_sync();
848 kfree(vlantrunks, M_VLAN);
854 vlan_unconfig_dispatch(netmsg_t msg)
856 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)msg;
857 struct sockaddr_dl *sdl;
859 struct ifnet *ifp_p, *ifp;
862 /* Assert in netisr0 */
867 if (ifp->if_flags & IFF_UP)
870 ifnet_serialize_all(ifp);
872 ifp->if_flags &= ~IFF_RUNNING;
875 * Save parent ifnet pointer and disconnect from parent.
877 * This is done early in this function, so input/output could
878 * know that we are disconnecting.
884 * Release vlan's serializer before reprogramming parent's
885 * multicast filter to avoid possible dead lock.
887 ifnet_deserialize_all(ifp);
891 * Since the interface is being unconfigured, we need to
892 * empty the list of multicast groups that we may have joined
893 * while we were alive from the parent's list.
895 vlan_clrmulti(ifv, ifp_p);
897 /* Clear parent's flags which was set by us. */
898 vlan_setflags(ifv, ifp_p, 0);
901 ifnet_serialize_all(ifp);
903 ifp->if_mtu = ETHERMTU;
905 /* Clear our MAC address. */
906 sdl = IF_LLSOCKADDR(ifp);
907 sdl->sdl_type = IFT_ETHER;
908 sdl->sdl_alen = ETHER_ADDR_LEN;
909 bzero(LLADDR(sdl), ETHER_ADDR_LEN);
910 bzero(ifv->ifv_ac.ac_enaddr, ETHER_ADDR_LEN);
912 ifnet_deserialize_all(ifp);
914 /* Unlink vlan from parent's vlantrunk */
915 if (ifp_p != NULL && ifp_p->if_vlantrunks != NULL)
916 vlan_unlink(ifv, ifp_p);
919 lwkt_replymsg(&vmsg->base.lmsg, error);
923 vlan_unconfig(struct ifvlan *ifv)
925 struct netmsg_vlan vmsg;
927 ASSERT_IFNET_NOT_SERIALIZED_ALL(&ifv->ifv_if);
929 bzero(&vmsg, sizeof(vmsg));
931 netmsg_init(&vmsg.base, NULL, &curthread->td_msgport,
932 0, vlan_unconfig_dispatch);
935 return lwkt_domsg(netisr_cpuport(0), &vmsg.base.lmsg, 0);
939 vlan_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr)
941 struct ifvlan *ifv = ifp->if_softc;
942 struct ifreq *ifr = (struct ifreq *)data;
947 ASSERT_IFNET_SERIALIZED_ALL(ifp);
954 * Release vlan interface's serializer to void
955 * possible dead lock.
957 ifnet_deserialize_all(ifp);
959 ifnet_serialize_all(ifp_p);
960 error = ifp_p->if_ioctl(ifp_p, SIOCGIFMEDIA, data, cr);
961 ifnet_deserialize_all(ifp_p);
963 ifnet_serialize_all(ifp);
965 if (ifv->ifv_p == NULL || ifv->ifv_p != ifp_p) {
967 * We are disconnected from the original
968 * parent interface or the parent interface
969 * is changed, after vlan interface's
970 * serializer is released.
975 /* Limit the result to the parent's current config. */
977 struct ifmediareq *ifmr;
979 ifmr = (struct ifmediareq *) data;
980 if (ifmr->ifm_count >= 1 && ifmr->ifm_ulist) {
982 error = copyout(&ifmr->ifm_current,
997 error = copyin(ifr->ifr_data, &vlr, sizeof vlr);
1001 ifnet_deserialize_all(ifp);
1002 if (vlr.vlr_parent[0] == '\0')
1003 error = vlan_unconfig(ifv);
1005 error = vlan_config(ifv, vlr.vlr_parent, vlr.vlr_tag);
1006 ifnet_serialize_all(ifp);
1010 bzero(&vlr, sizeof(vlr));
1012 strlcpy(vlr.vlr_parent, ifv->ifv_p->if_xname,
1013 sizeof(vlr.vlr_parent));
1014 vlr.vlr_tag = ifv->ifv_tag;
1016 error = copyout(&vlr, ifr->ifr_data, sizeof vlr);
1020 if (ifp->if_flags & IFF_UP)
1023 ifp->if_flags &= ~IFF_RUNNING;
1026 * We should propagate selected flags to the parent,
1027 * e.g., promiscuous mode.
1029 ifnet_deserialize_all(ifp);
1030 error = vlan_config_flags(ifv);
1031 ifnet_serialize_all(ifp);
1036 ifnet_deserialize_all(ifp);
1037 error = vlan_config_multi(ifv);
1038 ifnet_serialize_all(ifp);
1042 error = ether_ioctl(ifp, cmd, data);
1049 vlan_multi_dispatch(netmsg_t msg)
1051 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)msg;
1052 struct ifvlan *ifv = vmsg->nv_ifv;
1056 * If we don't have a parent, just remember the membership for
1059 if (ifv->ifv_p != NULL)
1060 error = vlan_setmulti(ifv, ifv->ifv_p);
1061 lwkt_replymsg(&vmsg->base.lmsg, error);
1065 vlan_config_multi(struct ifvlan *ifv)
1067 struct netmsg_vlan vmsg;
1069 ASSERT_IFNET_NOT_SERIALIZED_ALL(&ifv->ifv_if);
1071 bzero(&vmsg, sizeof(vmsg));
1073 netmsg_init(&vmsg.base, NULL, &curthread->td_msgport,
1074 0, vlan_multi_dispatch);
1077 return lwkt_domsg(netisr_cpuport(0), &vmsg.base.lmsg, 0);
1081 vlan_flags_dispatch(netmsg_t msg)
1083 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)msg;
1084 struct ifvlan *ifv = vmsg->nv_ifv;
1088 * If we don't have a parent, just remember the flags for
1091 if (ifv->ifv_p != NULL)
1092 error = vlan_setflags(ifv, ifv->ifv_p, 1);
1093 lwkt_replymsg(&vmsg->base.lmsg, error);
1097 vlan_config_flags(struct ifvlan *ifv)
1099 struct netmsg_vlan vmsg;
1101 ASSERT_IFNET_NOT_SERIALIZED_ALL(&ifv->ifv_if);
1103 bzero(&vmsg, sizeof(vmsg));
1105 netmsg_init(&vmsg.base, NULL, &curthread->td_msgport,
1106 0, vlan_flags_dispatch);
1109 return lwkt_domsg(netisr_cpuport(0), &vmsg.base.lmsg, 0);