- IFF_MONITOR processing will happen in ether_input_oncpu()
[dragonfly.git] / sys / net / vlan / if_vlan.c
CommitLineData
984263bc
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1/*
2 * Copyright 1998 Massachusetts Institute of Technology
3 *
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
14 * warranty.
15 *
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
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: src/sys/net/if_vlan.c,v 1.15.2.13 2003/02/14 22:25:58 fenner Exp $
7ed38756 30 * $DragonFly: src/sys/net/vlan/if_vlan.c,v 1.42 2008/11/21 13:37:02 sephe Exp $
984263bc
MD
31 */
32
33/*
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.
984263bc
MD
43 */
44
45#ifndef NVLAN
1f2de5d4 46#include "use_vlan.h"
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47#endif
48#include "opt_inet.h"
49
50#include <sys/param.h>
1f7ab7c9 51#include <sys/systm.h>
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52#include <sys/kernel.h>
53#include <sys/malloc.h>
54#include <sys/mbuf.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>
1f7ab7c9 60#include <sys/bus.h>
126fc6c4 61#include <sys/thread2.h>
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62
63#include <net/bpf.h>
64#include <net/ethernet.h>
65#include <net/if.h>
66#include <net/if_arp.h>
67#include <net/if_dl.h>
68#include <net/if_types.h>
4d723e5a 69#include <net/ifq_var.h>
65a24520 70#include <net/if_clone.h>
83790f85 71#include <net/netmsg2.h>
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72
73#ifdef INET
74#include <netinet/in.h>
75#include <netinet/if_ether.h>
76#endif
77
4f7ea046
SZ
78#include <net/vlan/if_vlan_var.h>
79#include <net/vlan/if_vlan_ether.h>
80
9433ab01
SZ
81struct ifvlan;
82
83790f85
SZ
83struct vlan_mc_entry {
84 struct ether_addr mc_addr;
85 SLIST_ENTRY(vlan_mc_entry) mc_entries;
86};
87
9433ab01
SZ
88struct vlan_entry {
89 struct ifvlan *ifv;
90 LIST_ENTRY(vlan_entry) ifv_link;
91};
92
83790f85
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93struct ifvlan {
94 struct arpcom ifv_ac; /* make this an interface */
95 struct ifnet *ifv_p; /* parent inteface of this vlan */
96 struct ifv_linkmib {
97 int ifvm_parent;
9433ab01
SZ
98 uint16_t ifvm_proto; /* encapsulation ethertype */
99 uint16_t ifvm_tag; /* tag to apply on packets leaving if */
83790f85 100 } ifv_mib;
9433ab01 101 SLIST_HEAD(, vlan_mc_entry) vlan_mc_listhead;
83790f85 102 LIST_ENTRY(ifvlan) ifv_list;
9433ab01 103 struct vlan_entry ifv_entries[1];
83790f85
SZ
104};
105#define ifv_if ifv_ac.ac_if
106#define ifv_tag ifv_mib.ifvm_tag
107
9433ab01
SZ
108struct vlan_trunk {
109 LIST_HEAD(, vlan_entry) vlan_list;
110};
111
112struct netmsg_vlan {
113 struct netmsg nv_nmsg;
114 struct ifvlan *nv_ifv;
115 struct ifnet *nv_ifp_p;
116 const char *nv_parent_name;
117 uint16_t nv_vlantag;
118};
119
984263bc 120#define VLANNAME "vlan"
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121
122SYSCTL_DECL(_net_link);
123SYSCTL_NODE(_net_link, IFT_L2VLAN, vlan, CTLFLAG_RW, 0, "IEEE 802.1Q VLAN");
124SYSCTL_NODE(_net_link_vlan, PF_LINK, link, CTLFLAG_RW, 0, "for consistency");
125
126static MALLOC_DEFINE(M_VLAN, "vlan", "802.1Q Virtual LAN Interface");
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127static LIST_HEAD(, ifvlan) ifv_list;
128
9433ab01
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129static int vlan_clone_create(struct if_clone *, int);
130static void vlan_clone_destroy(struct ifnet *);
131static void vlan_ifdetach(void *, struct ifnet *);
132
133static void vlan_init(void *);
134static void vlan_start(struct ifnet *);
135static int vlan_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
50098e2e 136static void vlan_input(struct mbuf *);
9433ab01
SZ
137
138static void vlan_clrmulti(struct ifvlan *, struct ifnet *);
139static int vlan_setmulti(struct ifvlan *, struct ifnet *);
140static int vlan_config_multi(struct ifvlan *);
141static int vlan_config(struct ifvlan *, const char *, uint16_t);
142static int vlan_unconfig(struct ifvlan *);
143static void vlan_link(struct ifvlan *, struct ifnet *);
144static void vlan_unlink(struct ifvlan *, struct ifnet *);
145
146static void vlan_config_dispatch(struct netmsg *);
147static void vlan_unconfig_dispatch(struct netmsg *);
148static void vlan_link_dispatch(struct netmsg *);
149static void vlan_unlink_dispatch(struct netmsg *);
150static void vlan_multi_dispatch(struct netmsg *);
151static void vlan_ifdetach_dispatch(struct netmsg *);
152
153static eventhandler_tag vlan_ifdetach_cookie;
154static struct if_clone vlan_cloner =
155 IF_CLONE_INITIALIZER("vlan", vlan_clone_create, vlan_clone_destroy,
156 NVLAN, IF_MAXUNIT);
157
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158/*
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.
165 */
166static int
9433ab01 167vlan_setmulti(struct ifvlan *ifv, struct ifnet *ifp_p)
984263bc 168{
9433ab01
SZ
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;
984263bc 173
9433ab01 174 ASSERT_NOT_SERIALIZED(ifp->if_serializer);
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175
176 /*
9433ab01 177 * First, remove any existing filter entries.
984263bc 178 */
9433ab01 179 vlan_clrmulti(ifv, ifp_p);
984263bc 180
9433ab01
SZ
181 /*
182 * Now program new ones.
183 */
184 bzero(&sdl, sizeof(sdl));
185 sdl.sdl_len = sizeof(sdl);
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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;
190
984263bc 191 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
9433ab01
SZ
192 int error;
193
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MD
194 if (ifma->ifma_addr->sa_family != AF_LINK)
195 continue;
9433ab01
SZ
196
197 /* Save a copy */
efda3bd0 198 mc = kmalloc(sizeof(struct vlan_mc_entry), M_VLAN, M_WAITOK);
984263bc 199 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
9433ab01
SZ
200 &mc->mc_addr, ETHER_ADDR_LEN);
201 SLIST_INSERT_HEAD(&ifv->vlan_mc_listhead, mc, mc_entries);
202
203 /* Program the parent multicast filter */
984263bc 204 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
9433ab01 205 LLADDR(&sdl), ETHER_ADDR_LEN);
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206 error = if_addmulti(ifp_p, (struct sockaddr *)&sdl, &rifma);
207 if (error)
9433ab01 208 return error;
984263bc 209 }
9433ab01
SZ
210 return 0;
211}
212
213static void
214vlan_clrmulti(struct ifvlan *ifv, struct ifnet *ifp_p)
215{
216 struct vlan_mc_entry *mc;
217 struct sockaddr_dl sdl;
984263bc 218
9433ab01
SZ
219 ASSERT_NOT_SERIALIZED(ifv->ifv_if.if_serializer);
220
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;
227
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 */
231
232 SLIST_REMOVE_HEAD(&ifv->vlan_mc_listhead, mc_entries);
233 kfree(mc, M_VLAN);
234 }
984263bc
MD
235}
236
237static int
9433ab01
SZ
238vlan_modevent(module_t mod, int type, void *data)
239{
240 switch (type) {
241 case MOD_LOAD:
984263bc 242 LIST_INIT(&ifv_list);
50098e2e 243 vlan_input_p = vlan_input;
9433ab01
SZ
244 vlan_ifdetach_cookie =
245 EVENTHANDLER_REGISTER(ifnet_detach_event,
246 vlan_ifdetach, NULL,
247 EVENTHANDLER_PRI_ANY);
984263bc 248 if_clone_attach(&vlan_cloner);
9433ab01
SZ
249 break;
250
251 case MOD_UNLOAD:
984263bc 252 if_clone_detach(&vlan_cloner);
b327296f 253
50098e2e 254 vlan_input_p = NULL;
b327296f
SZ
255 /*
256 * Make that all protocol threads see vlan_input_p change.
257 */
258 netmsg_service_sync();
259
9433ab01
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260 EVENTHANDLER_DEREGISTER(ifnet_detach_event,
261 vlan_ifdetach_cookie);
984263bc
MD
262 while (!LIST_EMPTY(&ifv_list))
263 vlan_clone_destroy(&LIST_FIRST(&ifv_list)->ifv_if);
984263bc 264 break;
9433ab01
SZ
265 }
266 return 0;
267}
984263bc 268
9433ab01
SZ
269static moduledata_t vlan_mod = {
270 "if_vlan",
271 vlan_modevent,
984263bc 272 0
9433ab01 273};
984263bc
MD
274
275DECLARE_MODULE(if_vlan, vlan_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
276
9433ab01
SZ
277static void
278vlan_ifdetach_dispatch(struct netmsg *nmsg)
279{
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;
284
285 vlantrunks = ifp_p->if_vlantrunks;
286 if (vlantrunks == NULL)
287 goto reply;
288 trunk = &vlantrunks[mycpuid];
289
290 while (ifp_p->if_vlantrunks &&
291 (ifve = LIST_FIRST(&trunk->vlan_list)) != NULL)
292 vlan_unconfig(ifve->ifv);
293reply:
294 lwkt_replymsg(&nmsg->nm_lmsg, 0);
295}
296
297static void
298vlan_ifdetach(void *arg __unused, struct ifnet *ifp)
299{
300 struct netmsg_vlan vmsg;
301 struct netmsg *nmsg;
302
303 ASSERT_NOT_SERIALIZED(ifp->if_serializer);
304
305 bzero(&vmsg, sizeof(vmsg));
306 nmsg = &vmsg.nv_nmsg;
307
308 netmsg_init(nmsg, &curthread->td_msgport, 0, vlan_ifdetach_dispatch);
309 vmsg.nv_ifp_p = ifp;
310
311 lwkt_domsg(cpu_portfn(0), &nmsg->nm_lmsg, 0);
312}
313
984263bc 314static int
b7b982e2 315vlan_clone_create(struct if_clone *ifc, int unit)
984263bc 316{
984263bc
MD
317 struct ifvlan *ifv;
318 struct ifnet *ifp;
9433ab01 319 int vlan_size, i;
984263bc 320
9433ab01
SZ
321 vlan_size = sizeof(struct ifvlan)
322 + ((ncpus - 1) * sizeof(struct vlan_entry));
323 ifv = kmalloc(vlan_size, M_VLAN, M_WAITOK | M_ZERO);
984263bc 324 SLIST_INIT(&ifv->vlan_mc_listhead);
9433ab01
SZ
325 for (i = 0; i < ncpus; ++i)
326 ifv->ifv_entries[i].ifv = ifv;
984263bc 327
9433ab01 328 crit_enter(); /* XXX not MP safe */
984263bc 329 LIST_INSERT_HEAD(&ifv_list, ifv, ifv_list);
126fc6c4 330 crit_exit();
984263bc 331
9433ab01 332 ifp = &ifv->ifv_if;
984263bc 333 ifp->if_softc = ifv;
cdb7d804 334 if_initname(ifp, "vlan", unit);
984263bc
MD
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 */
339
9433ab01 340 ifp->if_init = vlan_init;
984263bc
MD
341 ifp->if_start = vlan_start;
342 ifp->if_ioctl = vlan_ioctl;
4d723e5a
JS
343 ifq_set_maxlen(&ifp->if_snd, ifqmaxlen);
344 ifq_set_ready(&ifp->if_snd);
78195a76 345 ether_ifattach(ifp, ifv->ifv_ac.ac_enaddr, NULL);
984263bc
MD
346 /* Now undo some of the damage... */
347 ifp->if_data.ifi_type = IFT_L2VLAN;
348 ifp->if_data.ifi_hdrlen = EVL_ENCAPLEN;
349
350 return (0);
351}
352
353static void
354vlan_clone_destroy(struct ifnet *ifp)
355{
356 struct ifvlan *ifv = ifp->if_softc;
984263bc 357
9433ab01 358 crit_enter(); /* XXX not MP safe */
984263bc 359 LIST_REMOVE(ifv, ifv_list);
126fc6c4
JS
360 crit_exit();
361
9433ab01
SZ
362 vlan_unconfig(ifv);
363 ether_ifdetach(ifp);
364
efda3bd0 365 kfree(ifv, M_VLAN);
984263bc
MD
366}
367
368static void
9433ab01 369vlan_init(void *xsc)
984263bc 370{
9433ab01
SZ
371 struct ifvlan *ifv = xsc;
372 struct ifnet *ifp = &ifv->ifv_if;
373
374 ASSERT_SERIALIZED(ifp->if_serializer);
375
376 if (ifv->ifv_p != NULL)
377 ifp->if_flags |= IFF_RUNNING;
984263bc
MD
378}
379
380static void
381vlan_start(struct ifnet *ifp)
382{
9433ab01
SZ
383 struct ifvlan *ifv = ifp->if_softc;
384 struct ifnet *ifp_p = ifv->ifv_p;
984263bc
MD
385 struct mbuf *m;
386
9433ab01
SZ
387 ASSERT_SERIALIZED(ifp->if_serializer);
388
c7ecdcdf
SZ
389 if (ifp_p == NULL) {
390 ifq_purge(&ifp->if_snd);
391 return;
392 }
393
394 if ((ifp->if_flags & IFF_RUNNING) == 0)
9433ab01 395 return;
984263bc 396
984263bc 397 for (;;) {
83790f85
SZ
398 struct netmsg_packet *nmp;
399 struct netmsg *nmsg;
400 struct lwkt_port *port;
401
d2c71fa0
MD
402 m = ifq_dequeue(&ifp->if_snd, NULL);
403 if (m == NULL)
984263bc 404 break;
7600679e 405 BPF_MTAP(ifp, m);
984263bc
MD
406
407 /*
408 * Do not run parent's if_start() if the parent is not up,
409 * or parent's driver will cause a system crash.
410 */
83790f85
SZ
411 if ((ifp_p->if_flags & (IFF_UP | IFF_RUNNING)) !=
412 (IFF_UP | IFF_RUNNING)) {
984263bc
MD
413 m_freem(m);
414 ifp->if_data.ifi_collisions++;
415 continue;
416 }
417
4d723e5a 418 /*
83790f85
SZ
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
424 * is really valid.
4d723e5a 425 */
83790f85
SZ
426 m->m_pkthdr.ether_vlantag = ifv->ifv_tag;
427 m->m_flags |= M_VLANTAG;
4d723e5a 428
83790f85
SZ
429 nmp = &m->m_hdr.mh_netmsg;
430 nmsg = &nmp->nm_netmsg;
984263bc 431
83790f85
SZ
432 netmsg_init(nmsg, &netisr_apanic_rport, 0, vlan_start_dispatch);
433 nmp->nm_packet = m;
434 nmsg->nm_lmsg.u.ms_resultp = ifp_p;
435
436 port = cpu_portfn(ifp_p->if_index % ncpus /* XXX */);
437 lwkt_sendmsg(port, &nmp->nm_netmsg.nm_lmsg);
438 ifp->if_opackets++;
984263bc 439 }
984263bc
MD
440}
441
7af50411 442static void
50098e2e 443vlan_input(struct mbuf *m)
7af50411
SZ
444{
445 struct ifvlan *ifv = NULL;
446 struct ifnet *rcvif, *ifp;
447 struct vlan_trunk *vlantrunks;
448 struct vlan_entry *entry;
449
450 rcvif = m->m_pkthdr.rcvif;
451 KKASSERT(m->m_flags & M_VLANTAG);
452
453 vlantrunks = rcvif->if_vlantrunks;
454 if (vlantrunks == NULL) {
455 rcvif->if_noproto++;
456 m_freem(m);
457 return;
458 }
459
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)) {
464 ifv = entry->ifv;
465 break;
466 }
467 }
468 crit_exit();
469
470 /*
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)
7af50411 475 */
7ed38756 476 if (ifv == NULL || ifv->ifv_p != rcvif) {
7af50411
SZ
477 rcvif->if_noproto++;
478 m_freem(m);
479 return;
480 }
481 ifp = &ifv->ifv_if;
482
483 /*
484 * Clear M_VLANTAG, before the packet is handed to
485 * vlan(4) interface
486 */
487 m->m_flags &= ~M_VLANTAG;
488
7ed38756
SZ
489 /* Discard packet if interface is not up */
490 if (!(ifp->if_flags & IFF_UP)) {
491 m_freem(m);
492 return;
493 }
494
7af50411
SZ
495 /* Change receiving interface */
496 m->m_pkthdr.rcvif = ifp;
497
498 /* Update statistics */
499 ifp->if_ipackets++;
500 ifp->if_ibytes += m->m_pkthdr.len;
501 if (m->m_flags & (M_MCAST | M_BCAST))
502 ifp->if_imcasts++;
503
504 BPF_MTAP(ifp, m);
505
7af50411
SZ
506 ether_input_oncpu(ifp, m);
507}
508
9433ab01
SZ
509static void
510vlan_link_dispatch(struct netmsg *nmsg)
511{
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;
517 int cpu = mycpuid;
518
519 vlantrunks = ifp_p->if_vlantrunks;
520 KASSERT(vlantrunks != NULL,
521 ("vlan trunk has not been initialized yet\n"));
522
523 entry = &ifv->ifv_entries[cpu];
524 trunk = &vlantrunks[cpu];
525
526 crit_enter();
527 LIST_INSERT_HEAD(&trunk->vlan_list, entry, ifv_link);
528 crit_exit();
529
4e9c6c84 530 ifnet_forwardmsg(&nmsg->nm_lmsg, cpu + 1);
9433ab01
SZ
531}
532
533static void
534vlan_link(struct ifvlan *ifv, struct ifnet *ifp_p)
984263bc 535{
9433ab01
SZ
536 struct netmsg_vlan vmsg;
537 struct netmsg *nmsg;
538
539 /* Assert in netisr0 */
540 ASSERT_NOT_SERIALIZED(ifv->ifv_if.if_serializer);
541
542 if (ifp_p->if_vlantrunks == NULL) {
543 struct vlan_trunk *vlantrunks;
544 int i;
545
546 vlantrunks = kmalloc(sizeof(*vlantrunks) * ncpus, M_VLAN,
547 M_WAITOK | M_ZERO);
548 for (i = 0; i < ncpus; ++i)
549 LIST_INIT(&vlantrunks[i].vlan_list);
550
551 ifp_p->if_vlantrunks = vlantrunks;
552 }
553
554 bzero(&vmsg, sizeof(vmsg));
555 nmsg = &vmsg.nv_nmsg;
556
557 netmsg_init(nmsg, &curthread->td_msgport, 0, vlan_link_dispatch);
558 vmsg.nv_ifv = ifv;
559 vmsg.nv_ifp_p = ifp_p;
560
4e9c6c84 561 ifnet_domsg(&nmsg->nm_lmsg, 0);
9433ab01
SZ
562}
563
564static void
565vlan_config_dispatch(struct netmsg *nmsg)
566{
567 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)nmsg;
568 struct ifvlan *ifv;
569 struct ifnet *ifp_p, *ifp;
984263bc 570 struct sockaddr_dl *sdl1, *sdl2;
9433ab01
SZ
571 int error;
572
573 /* Assert in netisr0 */
574
575 ifp_p = ifunit(vmsg->nv_parent_name);
576 if (ifp_p == NULL) {
577 error = ENOENT;
578 goto reply;
579 }
580
581 if (ifp_p->if_data.ifi_type != IFT_ETHER) {
582 error = EPROTONOSUPPORT;
583 goto reply;
584 }
585
586 ifv = vmsg->nv_ifv;
587 ifp = &ifv->ifv_if;
984263bc 588
9433ab01
SZ
589 if (ifv->ifv_p) {
590 error = EBUSY;
591 goto reply;
592 }
593
594 /* Link vlan into parent's vlantrunk */
595 vlan_link(ifv, ifp_p);
596
597 lwkt_serialize_enter(ifp->if_serializer);
598
599 ifv->ifv_tag = vmsg->nv_vlantag;
600 if (ifp_p->if_capenable & IFCAP_VLAN_MTU)
601 ifp->if_mtu = ifp_p->if_mtu;
984263bc 602 else
9433ab01 603 ifp->if_mtu = ifp_p->if_data.ifi_mtu - EVL_ENCAPLEN;
984263bc
MD
604
605 /*
606 * Copy only a selected subset of flags from the parent.
607 * Other flags are none of our business.
608 */
9433ab01 609 ifp->if_flags = (ifp_p->if_flags &
984263bc
MD
610 (IFF_BROADCAST | IFF_MULTICAST | IFF_SIMPLEX | IFF_POINTOPOINT));
611
612 /*
613 * Set up our ``Ethernet address'' to reflect the underlying
614 * physical interface's.
615 */
9433ab01
SZ
616 sdl1 = IF_LLSOCKADDR(ifp);
617 sdl2 = IF_LLSOCKADDR(ifp_p);
984263bc
MD
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);
622
9433ab01
SZ
623 /*
624 * Release vlan's serializer before reprogramming parent's
625 * multicast filter to avoid possible dead lock.
626 */
627 lwkt_serialize_exit(ifp->if_serializer);
628
984263bc
MD
629 /*
630 * Configure multicast addresses that may already be
631 * joined on the vlan device.
632 */
9433ab01 633 vlan_setmulti(ifv, ifp_p);
984263bc 634
9433ab01
SZ
635 /*
636 * Connect to parent after everything have been set up,
637 * so input/output could know that vlan is ready to go
638 */
639 ifv->ifv_p = ifp_p;
640 error = 0;
641reply:
642 lwkt_replymsg(&nmsg->nm_lmsg, error);
984263bc
MD
643}
644
645static int
9433ab01
SZ
646vlan_config(struct ifvlan *ifv, const char *parent_name, uint16_t vlantag)
647{
648 struct netmsg_vlan vmsg;
649 struct netmsg *nmsg;
650
651 ASSERT_NOT_SERIALIZED(ifv->ifv_if.if_serializer);
652
653 bzero(&vmsg, sizeof(vmsg));
654 nmsg = &vmsg.nv_nmsg;
655
656 netmsg_init(nmsg, &curthread->td_msgport, 0, vlan_config_dispatch);
657 vmsg.nv_ifv = ifv;
658 vmsg.nv_parent_name = parent_name;
659 vmsg.nv_vlantag = vlantag;
660
661 return lwkt_domsg(cpu_portfn(0), &nmsg->nm_lmsg, 0);
662}
663
664static void
665vlan_unlink_dispatch(struct netmsg *nmsg)
666{
667 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)nmsg;
668 struct ifvlan *ifv = vmsg->nv_ifv;
9433ab01
SZ
669 struct vlan_entry *entry;
670 int cpu = mycpuid;
671
2700fbed 672 KASSERT(vmsg->nv_ifp_p->if_vlantrunks != NULL,
9433ab01
SZ
673 ("vlan trunk has not been initialized yet\n"));
674 entry = &ifv->ifv_entries[cpu];
675
676 crit_enter();
677 LIST_REMOVE(entry, ifv_link);
678 crit_exit();
679
4e9c6c84 680 ifnet_forwardmsg(&nmsg->nm_lmsg, cpu + 1);
9433ab01
SZ
681}
682
683static void
684vlan_unlink(struct ifvlan *ifv, struct ifnet *ifp_p)
984263bc 685{
9433ab01
SZ
686 struct vlan_trunk *vlantrunks = ifp_p->if_vlantrunks;
687 struct netmsg_vlan vmsg;
688 struct netmsg *nmsg;
689
690 /* Assert in netisr0 */
691 ASSERT_NOT_SERIALIZED(ifv->ifv_if.if_serializer);
692
693 KASSERT(ifp_p->if_vlantrunks != NULL,
694 ("vlan trunk has not been initialized yet\n"));
695
696 bzero(&vmsg, sizeof(vmsg));
697 nmsg = &vmsg.nv_nmsg;
698
699 netmsg_init(nmsg, &curthread->td_msgport, 0, vlan_unlink_dispatch);
700 vmsg.nv_ifv = ifv;
701 vmsg.nv_ifp_p = ifp_p;
702
4e9c6c84 703 ifnet_domsg(&nmsg->nm_lmsg, 0);
9433ab01
SZ
704
705 crit_enter();
706 if (LIST_EMPTY(&vlantrunks[mycpuid].vlan_list)) {
9433ab01 707 ifp_p->if_vlantrunks = NULL;
297c8124
SZ
708
709 /*
710 * Make that all protocol threads see if_vlantrunks change.
711 */
9433ab01
SZ
712 netmsg_service_sync();
713 kfree(vlantrunks, M_VLAN);
9433ab01
SZ
714 }
715 crit_exit();
716}
717
718static void
719vlan_unconfig_dispatch(struct netmsg *nmsg)
720{
721 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)nmsg;
984263bc 722 struct sockaddr_dl *sdl;
984263bc 723 struct ifvlan *ifv;
9433ab01 724 struct ifnet *ifp_p, *ifp;
984263bc
MD
725 int error;
726
9433ab01
SZ
727 /* Assert in netisr0 */
728
729 ifv = vmsg->nv_ifv;
730 ifp = &ifv->ifv_if;
731
732 if (ifp->if_flags & IFF_UP)
733 if_down(ifp);
984263bc 734
9433ab01
SZ
735 lwkt_serialize_enter(ifp->if_serializer);
736
737 ifp->if_flags &= ~IFF_RUNNING;
738
739 /*
740 * Save parent ifnet pointer and disconnect from parent.
741 *
742 * This is done early in this function, so input/output could
743 * know that we are disconnecting.
744 */
745 ifp_p = ifv->ifv_p;
746 ifv->ifv_p = NULL;
747
748 /*
749 * Release vlan's serializer before reprogramming parent's
750 * multicast filter to avoid possible dead lock.
751 */
752 lwkt_serialize_exit(ifp->if_serializer);
984263bc 753
9433ab01 754 if (ifp_p) {
984263bc
MD
755 /*
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.
759 */
9433ab01 760 vlan_clrmulti(ifv, ifp_p);
984263bc
MD
761 }
762
9433ab01
SZ
763 lwkt_serialize_enter(ifp->if_serializer);
764
765 ifp->if_mtu = ETHERMTU;
984263bc
MD
766
767 /* Clear our MAC address. */
9433ab01 768 sdl = IF_LLSOCKADDR(ifp);
984263bc
MD
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);
773
9433ab01
SZ
774 lwkt_serialize_exit(ifp->if_serializer);
775
776 /* Unlink vlan from parent's vlantrunk */
777 if (ifp_p != NULL && ifp_p->if_vlantrunks != NULL)
778 vlan_unlink(ifv, ifp_p);
779
780 error = 0;
781 lwkt_replymsg(&nmsg->nm_lmsg, error);
782}
783
784static int
785vlan_unconfig(struct ifvlan *ifv)
786{
787 struct netmsg_vlan vmsg;
788 struct netmsg *nmsg;
789
790 ASSERT_NOT_SERIALIZED(ifv->ifv_if.if_serializer);
791
792 bzero(&vmsg, sizeof(vmsg));
793 nmsg = &vmsg.nv_nmsg;
794
795 netmsg_init(nmsg, &curthread->td_msgport, 0, vlan_unconfig_dispatch);
796 vmsg.nv_ifv = ifv;
797
798 return lwkt_domsg(cpu_portfn(0), &nmsg->nm_lmsg, 0);
984263bc
MD
799}
800
801static int
bd4539cc 802vlan_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr)
984263bc 803{
9433ab01
SZ
804 struct ifvlan *ifv = ifp->if_softc;
805 struct ifreq *ifr = (struct ifreq *)data;
806 struct ifnet *ifp_p;
984263bc
MD
807 struct vlanreq vlr;
808 int error = 0;
809
78195a76 810 ASSERT_SERIALIZED(ifp->if_serializer);
126fc6c4 811
984263bc 812 switch (cmd) {
984263bc 813 case SIOCGIFMEDIA:
9433ab01
SZ
814 ifp_p = ifv->ifv_p;
815 if (ifp_p != NULL) {
7d50fe58
SZ
816 /*
817 * Release vlan interface's serializer to void
818 * possible dead lock.
819 */
78195a76 820 lwkt_serialize_exit(ifp->if_serializer);
9433ab01
SZ
821
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);
825
78195a76 826 lwkt_serialize_enter(ifp->if_serializer);
7d50fe58
SZ
827
828 if (ifv->ifv_p == NULL && ifv->ifv_p != ifp_p) {
829 /*
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.
834 */
835 error = EINVAL;
836 }
837
984263bc
MD
838 /* Limit the result to the parent's current config. */
839 if (error == 0) {
840 struct ifmediareq *ifmr;
841
842 ifmr = (struct ifmediareq *) data;
843 if (ifmr->ifm_count >= 1 && ifmr->ifm_ulist) {
844 ifmr->ifm_count = 1;
845 error = copyout(&ifmr->ifm_current,
846 ifmr->ifm_ulist,
847 sizeof(int));
848 }
849 }
9433ab01 850 } else {
984263bc 851 error = EINVAL;
9433ab01 852 }
984263bc
MD
853 break;
854
855 case SIOCSIFMEDIA:
856 error = EINVAL;
857 break;
858
984263bc
MD
859 case SIOCSETVLAN:
860 error = copyin(ifr->ifr_data, &vlr, sizeof vlr);
861 if (error)
862 break;
9433ab01
SZ
863
864 lwkt_serialize_exit(ifp->if_serializer);
865 if (vlr.vlr_parent[0] == '\0')
866 error = vlan_unconfig(ifv);
867 else
868 error = vlan_config(ifv, vlr.vlr_parent, vlr.vlr_tag);
869 lwkt_serialize_enter(ifp->if_serializer);
984263bc 870 break;
9433ab01 871
984263bc 872 case SIOCGETVLAN:
9433ab01 873 bzero(&vlr, sizeof(vlr));
984263bc 874 if (ifv->ifv_p) {
cdb7d804
MD
875 strlcpy(vlr.vlr_parent, ifv->ifv_p->if_xname,
876 sizeof(vlr.vlr_parent));
984263bc
MD
877 vlr.vlr_tag = ifv->ifv_tag;
878 }
879 error = copyout(&vlr, ifr->ifr_data, sizeof vlr);
880 break;
7d50fe58 881
984263bc 882 case SIOCSIFFLAGS:
9433ab01
SZ
883 if (ifp->if_flags & IFF_UP)
884 ifp->if_init(ifp);
885 else
886 ifp->if_flags &= ~IFF_RUNNING;
887
984263bc
MD
888 /*
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.
892 */
9433ab01
SZ
893 if (ifr->ifr_flags & IFF_PROMISC) {
894 ifp->if_flags &= ~IFF_PROMISC;
984263bc
MD
895 error = EINVAL;
896 }
897 break;
212db56c 898
984263bc
MD
899 case SIOCADDMULTI:
900 case SIOCDELMULTI:
9433ab01
SZ
901 lwkt_serialize_exit(ifp->if_serializer);
902 error = vlan_config_multi(ifv);
903 lwkt_serialize_enter(ifp->if_serializer);
984263bc 904 break;
212db56c 905
984263bc 906 default:
212db56c
SZ
907 error = ether_ioctl(ifp, cmd, data);
908 break;
984263bc 909 }
9433ab01
SZ
910 return error;
911}
126fc6c4 912
9433ab01
SZ
913static void
914vlan_multi_dispatch(struct netmsg *nmsg)
915{
916 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)nmsg;
917 struct ifvlan *ifv = vmsg->nv_ifv;
918 int error = 0;
126fc6c4 919
9433ab01
SZ
920 /*
921 * If we don't have a parent, just remember the membership for
922 * when we do.
923 */
924 if (ifv->ifv_p != NULL)
925 error = vlan_setmulti(ifv, ifv->ifv_p);
926 lwkt_replymsg(&nmsg->nm_lmsg, error);
927}
928
929static int
930vlan_config_multi(struct ifvlan *ifv)
931{
932 struct netmsg_vlan vmsg;
933 struct netmsg *nmsg;
934
935 ASSERT_NOT_SERIALIZED(ifv->ifv_if.if_serializer);
936
937 bzero(&vmsg, sizeof(vmsg));
938 nmsg = &vmsg.nv_nmsg;
939
940 netmsg_init(nmsg, &curthread->td_msgport, 0, vlan_multi_dispatch);
941 vmsg.nv_ifv = ifv;
942
943 return lwkt_domsg(cpu_portfn(0), &nmsg->nm_lmsg, 0);
984263bc 944}