2 * Copyright 2001 Wasabi Systems, Inc.
5 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed for the NetBSD Project by
18 * Wasabi Systems, Inc.
19 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
20 * or promote products derived from this software without specific prior
23 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
25 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
26 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
27 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
33 * POSSIBILITY OF SUCH DAMAGE.
37 * Copyright (c) 1999, 2000 Jason L. Wright (jason@thought.net)
38 * All rights reserved.
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
43 * 1. Redistributions of source code must retain the above copyright
44 * notice, this list of conditions and the following disclaimer.
45 * 2. Redistributions in binary form must reproduce the above copyright
46 * notice, this list of conditions and the following disclaimer in the
47 * documentation and/or other materials provided with the distribution.
48 * 3. All advertising materials mentioning features or use of this software
49 * must display the following acknowledgement:
50 * This product includes software developed by Jason L. Wright
51 * 4. The name of the author may not be used to endorse or promote products
52 * derived from this software without specific prior written permission.
54 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
55 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
56 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
57 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
58 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
59 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
60 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
62 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
63 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
64 * POSSIBILITY OF SUCH DAMAGE.
66 * $OpenBSD: if_bridge.c,v 1.60 2001/06/15 03:38:33 itojun Exp $
67 * $NetBSD: if_bridge.c,v 1.31 2005/06/01 19:45:34 jdc Exp $
68 * $FreeBSD: src/sys/net/if_bridge.c,v 1.26 2005/10/13 23:05:55 thompsa Exp $
72 * Network interface bridge support.
76 * - Currently only supports Ethernet-like interfaces (Ethernet,
77 * 802.11, VLANs on Ethernet, etc.) Figure out a nice way
78 * to bridge other types of interfaces (FDDI-FDDI, and maybe
79 * consider heterogenous bridges).
82 * Bridge's route information is duplicated to each CPUs:
85 * +-----------+ +-----------+ +-----------+ +-----------+
86 * | rtnode | | rtnode | | rtnode | | rtnode |
88 * | dst eaddr | | dst eaddr | | dst eaddr | | dst eaddr |
89 * +-----------+ +-----------+ +-----------+ +-----------+
92 * | | +----------+ | |
96 * +-------------->| timeout |<-------------+
100 * We choose to put timeout and dst_ifp into shared part, so updating
101 * them will be cheaper than using message forwarding. Also there is
102 * not need to use spinlock to protect the updating: timeout and dst_ifp
103 * is not related and specific field's updating order has no importance.
104 * The cache pollution by the share part should not be heavy: in a stable
105 * setup, dst_ifp probably will be not changed in rtnode's life time,
106 * while timeout is refreshed once per second; most of the time, timeout
107 * and dst_ifp are read-only accessed.
110 * Bridge route information installation on bridge_input path:
112 * CPU0 CPU1 CPU2 CPU3
119 * ifnet0<-----------------------+
122 * rtnode exists?(Y)free nmsg :
153 * The netmsgs forwarded between protocol threads and ifnet threads are
154 * allocated with (M_WAITOK|M_NULLOK), so it will not fail under most
155 * cases (route information is too precious to be not installed :).
156 * Since multiple threads may try to install route information for the
157 * same dst eaddr, we look up route information in ifnet0. However, this
158 * looking up only need to be performed on ifnet0, which is the start
159 * point of the route information installation process.
162 * Bridge route information deleting/flushing:
164 * CPU0 CPU1 CPU2 CPU3
168 * find suitable rtnodes,
169 * mark their rtinfo dead
171 * | domsg <------------------------------------------+
174 * V fwdmsg fwdmsg fwdmsg |
175 * ifnet0 --------> ifnet1 --------> ifnet2 --------> ifnet3
176 * delete rtnodes delete rtnodes delete rtnodes delete rtnodes
177 * w/ dead rtinfo w/ dead rtinfo w/ dead rtinfo w/ dead rtinfo
180 * All deleting/flushing operations are serialized by netisr0, so each
181 * operation only reaps the route information marked dead by itself.
184 * Bridge route information adding/deleting/flushing:
185 * Since all operation is serialized by the fixed message flow between
186 * ifnet threads, it is not possible to create corrupted per-cpu route
191 * Percpu member interface list iteration with blocking operation:
192 * Since one bridge could only delete one member interface at a time and
193 * the deleted member interface is not freed after netmsg_service_sync(),
194 * following way is used to make sure that even if the certain member
195 * interface is ripped from the percpu list during the blocking operation,
196 * the iteration still could keep going:
198 * TAILQ_FOREACH_MUTABLE(bif, sc->sc_iflists[mycpuid], bif_next, nbif) {
199 * blocking operation;
200 * blocking operation;
203 * if (nbif != NULL && !nbif->bif_onlist) {
204 * KKASSERT(bif->bif_onlist);
205 * nbif = TAILQ_NEXT(bif, bif_next);
209 * As mentioned above only one member interface could be unlinked from the
210 * percpu member interface list, so either bif or nbif may be not on the list,
211 * but _not_ both. To keep the list iteration, we don't care about bif, but
212 * only nbif. Since removed member interface will only be freed after we
213 * finish our work, it is safe to access any field in an unlinked bif (here
214 * bif_onlist). If nbif is no longer on the list, then bif must be on the
215 * list, so we change nbif to the next element of bif and keep going.
218 #include "opt_inet.h"
219 #include "opt_inet6.h"
221 #include <sys/param.h>
222 #include <sys/mbuf.h>
223 #include <sys/malloc.h>
224 #include <sys/protosw.h>
225 #include <sys/systm.h>
226 #include <sys/time.h>
227 #include <sys/socket.h> /* for net/if.h */
228 #include <sys/sockio.h>
229 #include <sys/ctype.h> /* string functions */
230 #include <sys/kernel.h>
231 #include <sys/random.h>
232 #include <sys/sysctl.h>
233 #include <sys/module.h>
234 #include <sys/proc.h>
235 #include <sys/priv.h>
236 #include <sys/lock.h>
237 #include <sys/thread.h>
238 #include <sys/thread2.h>
239 #include <sys/mpipe.h>
243 #include <net/if_dl.h>
244 #include <net/if_types.h>
245 #include <net/if_var.h>
246 #include <net/pfil.h>
247 #include <net/ifq_var.h>
248 #include <net/if_clone.h>
250 #include <netinet/in.h> /* for struct arpcom */
251 #include <netinet/in_systm.h>
252 #include <netinet/in_var.h>
253 #include <netinet/ip.h>
254 #include <netinet/ip_var.h>
256 #include <netinet/ip6.h>
257 #include <netinet6/ip6_var.h>
259 #include <netinet/if_ether.h> /* for struct arpcom */
260 #include <net/bridge/if_bridgevar.h>
261 #include <net/if_llc.h>
262 #include <net/netmsg2.h>
264 #include <net/route.h>
265 #include <sys/in_cksum.h>
268 * Size of the route hash table. Must be a power of two.
270 #ifndef BRIDGE_RTHASH_SIZE
271 #define BRIDGE_RTHASH_SIZE 1024
274 #define BRIDGE_RTHASH_MASK (BRIDGE_RTHASH_SIZE - 1)
277 * Maximum number of addresses to cache.
279 #ifndef BRIDGE_RTABLE_MAX
280 #define BRIDGE_RTABLE_MAX 100
284 * Spanning tree defaults.
286 #define BSTP_DEFAULT_MAX_AGE (20 * 256)
287 #define BSTP_DEFAULT_HELLO_TIME (2 * 256)
288 #define BSTP_DEFAULT_FORWARD_DELAY (15 * 256)
289 #define BSTP_DEFAULT_HOLD_TIME (1 * 256)
290 #define BSTP_DEFAULT_BRIDGE_PRIORITY 0x8000
291 #define BSTP_DEFAULT_PORT_PRIORITY 0x80
292 #define BSTP_DEFAULT_PATH_COST 55
295 * Timeout (in seconds) for entries learned dynamically.
297 #ifndef BRIDGE_RTABLE_TIMEOUT
298 #define BRIDGE_RTABLE_TIMEOUT (20 * 60) /* same as ARP */
302 * Number of seconds between walks of the route list.
304 #ifndef BRIDGE_RTABLE_PRUNE_PERIOD
305 #define BRIDGE_RTABLE_PRUNE_PERIOD (5 * 60)
309 * List of capabilities to mask on the member interface.
311 #define BRIDGE_IFCAPS_MASK (IFCAP_TXCSUM | IFCAP_TSO)
313 typedef int (*bridge_ctl_t)(struct bridge_softc *, void *);
315 struct netmsg_brctl {
316 struct netmsg_base base;
317 bridge_ctl_t bc_func;
318 struct bridge_softc *bc_sc;
322 struct netmsg_brsaddr {
323 struct netmsg_base base;
324 struct bridge_softc *br_softc;
325 struct ifnet *br_dst_if;
326 struct bridge_rtinfo *br_rtinfo;
328 uint8_t br_dst[ETHER_ADDR_LEN];
332 struct netmsg_braddbif {
333 struct netmsg_base base;
334 struct bridge_softc *br_softc;
335 struct bridge_ifinfo *br_bif_info;
336 struct ifnet *br_bif_ifp;
339 struct netmsg_brdelbif {
340 struct netmsg_base base;
341 struct bridge_softc *br_softc;
342 struct bridge_ifinfo *br_bif_info;
343 struct bridge_iflist_head *br_bif_list;
346 struct netmsg_brsflags {
347 struct netmsg_base base;
348 struct bridge_softc *br_softc;
349 struct bridge_ifinfo *br_bif_info;
350 uint32_t br_bif_flags;
353 eventhandler_tag bridge_detach_cookie = NULL;
355 extern struct mbuf *(*bridge_input_p)(struct ifnet *, struct mbuf *);
356 extern int (*bridge_output_p)(struct ifnet *, struct mbuf *);
357 extern void (*bridge_dn_p)(struct mbuf *, struct ifnet *);
358 extern struct ifnet *(*bridge_interface_p)(void *if_bridge);
360 static int bridge_rtable_prune_period = BRIDGE_RTABLE_PRUNE_PERIOD;
362 static int bridge_clone_create(struct if_clone *, int, caddr_t);
363 static int bridge_clone_destroy(struct ifnet *);
365 static int bridge_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
366 static void bridge_mutecaps(struct bridge_ifinfo *, struct ifnet *, int);
367 static void bridge_ifdetach(void *, struct ifnet *);
368 static void bridge_init(void *);
369 static int bridge_from_us(struct bridge_softc *, struct ether_header *);
370 static void bridge_stop(struct ifnet *);
371 static void bridge_start(struct ifnet *, struct ifaltq_subque *);
372 static struct mbuf *bridge_input(struct ifnet *, struct mbuf *);
373 static int bridge_output(struct ifnet *, struct mbuf *);
374 static struct ifnet *bridge_interface(void *if_bridge);
376 static void bridge_forward(struct bridge_softc *, struct mbuf *m);
378 static void bridge_timer_handler(netmsg_t);
379 static void bridge_timer(void *);
381 static void bridge_start_bcast(struct bridge_softc *, struct mbuf *);
382 static void bridge_broadcast(struct bridge_softc *, struct ifnet *,
384 static void bridge_span(struct bridge_softc *, struct mbuf *);
386 static int bridge_rtupdate(struct bridge_softc *, const uint8_t *,
387 struct ifnet *, uint8_t);
388 static struct ifnet *bridge_rtlookup(struct bridge_softc *, const uint8_t *);
389 static void bridge_rtreap(struct bridge_softc *);
390 static void bridge_rtreap_async(struct bridge_softc *);
391 static void bridge_rttrim(struct bridge_softc *);
392 static int bridge_rtage_finddead(struct bridge_softc *);
393 static void bridge_rtage(struct bridge_softc *);
394 static void bridge_rtflush(struct bridge_softc *, int);
395 static int bridge_rtdaddr(struct bridge_softc *, const uint8_t *);
396 static int bridge_rtsaddr(struct bridge_softc *, const uint8_t *,
397 struct ifnet *, uint8_t);
398 static void bridge_rtmsg_sync(struct bridge_softc *sc);
399 static void bridge_rtreap_handler(netmsg_t);
400 static void bridge_rtinstall_handler(netmsg_t);
401 static int bridge_rtinstall_oncpu(struct bridge_softc *, const uint8_t *,
402 struct ifnet *, int, uint8_t, struct bridge_rtinfo **);
404 static void bridge_rtable_init(struct bridge_softc *);
405 static void bridge_rtable_fini(struct bridge_softc *);
407 static int bridge_rtnode_addr_cmp(const uint8_t *, const uint8_t *);
408 static struct bridge_rtnode *bridge_rtnode_lookup(struct bridge_softc *,
410 static void bridge_rtnode_insert(struct bridge_softc *,
411 struct bridge_rtnode *);
412 static void bridge_rtnode_destroy(struct bridge_softc *,
413 struct bridge_rtnode *);
415 static struct bridge_iflist *bridge_lookup_member(struct bridge_softc *,
417 static struct bridge_iflist *bridge_lookup_member_if(struct bridge_softc *,
419 static struct bridge_iflist *bridge_lookup_member_ifinfo(struct bridge_softc *,
420 struct bridge_ifinfo *);
421 static void bridge_delete_member(struct bridge_softc *,
422 struct bridge_iflist *, int);
423 static void bridge_delete_span(struct bridge_softc *,
424 struct bridge_iflist *);
426 static int bridge_control(struct bridge_softc *, u_long,
427 bridge_ctl_t, void *);
428 static int bridge_ioctl_init(struct bridge_softc *, void *);
429 static int bridge_ioctl_stop(struct bridge_softc *, void *);
430 static int bridge_ioctl_add(struct bridge_softc *, void *);
431 static int bridge_ioctl_del(struct bridge_softc *, void *);
432 static void bridge_ioctl_fillflags(struct bridge_softc *sc,
433 struct bridge_iflist *bif, struct ifbreq *req);
434 static int bridge_ioctl_gifflags(struct bridge_softc *, void *);
435 static int bridge_ioctl_sifflags(struct bridge_softc *, void *);
436 static int bridge_ioctl_scache(struct bridge_softc *, void *);
437 static int bridge_ioctl_gcache(struct bridge_softc *, void *);
438 static int bridge_ioctl_gifs(struct bridge_softc *, void *);
439 static int bridge_ioctl_rts(struct bridge_softc *, void *);
440 static int bridge_ioctl_saddr(struct bridge_softc *, void *);
441 static int bridge_ioctl_sto(struct bridge_softc *, void *);
442 static int bridge_ioctl_gto(struct bridge_softc *, void *);
443 static int bridge_ioctl_daddr(struct bridge_softc *, void *);
444 static int bridge_ioctl_flush(struct bridge_softc *, void *);
445 static int bridge_ioctl_gpri(struct bridge_softc *, void *);
446 static int bridge_ioctl_spri(struct bridge_softc *, void *);
447 static int bridge_ioctl_reinit(struct bridge_softc *, void *);
448 static int bridge_ioctl_ght(struct bridge_softc *, void *);
449 static int bridge_ioctl_sht(struct bridge_softc *, void *);
450 static int bridge_ioctl_gfd(struct bridge_softc *, void *);
451 static int bridge_ioctl_sfd(struct bridge_softc *, void *);
452 static int bridge_ioctl_gma(struct bridge_softc *, void *);
453 static int bridge_ioctl_sma(struct bridge_softc *, void *);
454 static int bridge_ioctl_sifprio(struct bridge_softc *, void *);
455 static int bridge_ioctl_sifcost(struct bridge_softc *, void *);
456 static int bridge_ioctl_addspan(struct bridge_softc *, void *);
457 static int bridge_ioctl_delspan(struct bridge_softc *, void *);
458 static int bridge_ioctl_sifbondwght(struct bridge_softc *, void *);
459 static int bridge_pfil(struct mbuf **, struct ifnet *, struct ifnet *,
461 static int bridge_ip_checkbasic(struct mbuf **mp);
463 static int bridge_ip6_checkbasic(struct mbuf **mp);
465 static int bridge_fragment(struct ifnet *, struct mbuf *,
466 struct ether_header *, int, struct llc *);
467 static void bridge_enqueue_handler(netmsg_t);
468 static void bridge_handoff(struct bridge_softc *, struct ifnet *,
471 static void bridge_del_bif_handler(netmsg_t);
472 static void bridge_add_bif_handler(netmsg_t);
473 static void bridge_del_bif(struct bridge_softc *, struct bridge_ifinfo *,
474 struct bridge_iflist_head *);
475 static void bridge_add_bif(struct bridge_softc *, struct bridge_ifinfo *,
478 SYSCTL_DECL(_net_link);
479 SYSCTL_NODE(_net_link, IFT_BRIDGE, bridge, CTLFLAG_RW, 0, "Bridge");
481 static int pfil_onlyip = 1; /* only pass IP[46] packets when pfil is enabled */
482 static int pfil_bridge = 1; /* run pfil hooks on the bridge interface */
483 static int pfil_member = 1; /* run pfil hooks on the member interface */
484 static int bridge_debug;
485 SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_onlyip, CTLFLAG_RW,
486 &pfil_onlyip, 0, "Only pass IP packets when pfil is enabled");
487 SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_bridge, CTLFLAG_RW,
488 &pfil_bridge, 0, "Packet filter on the bridge interface");
489 SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_member, CTLFLAG_RW,
490 &pfil_member, 0, "Packet filter on the member interface");
491 SYSCTL_INT(_net_link_bridge, OID_AUTO, debug, CTLFLAG_RW,
492 &bridge_debug, 0, "Bridge debug mode");
494 struct bridge_control_arg {
496 struct ifbreq ifbreq;
497 struct ifbifconf ifbifconf;
498 struct ifbareq ifbareq;
499 struct ifbaconf ifbaconf;
500 struct ifbrparam ifbrparam;
507 struct bridge_control {
508 bridge_ctl_t bc_func;
513 #define BC_F_COPYIN 0x01 /* copy arguments in */
514 #define BC_F_COPYOUT 0x02 /* copy arguments out */
515 #define BC_F_SUSER 0x04 /* do super-user check */
517 const struct bridge_control bridge_control_table[] = {
518 { bridge_ioctl_add, sizeof(struct ifbreq),
519 BC_F_COPYIN|BC_F_SUSER },
520 { bridge_ioctl_del, sizeof(struct ifbreq),
521 BC_F_COPYIN|BC_F_SUSER },
523 { bridge_ioctl_gifflags, sizeof(struct ifbreq),
524 BC_F_COPYIN|BC_F_COPYOUT },
525 { bridge_ioctl_sifflags, sizeof(struct ifbreq),
526 BC_F_COPYIN|BC_F_SUSER },
528 { bridge_ioctl_scache, sizeof(struct ifbrparam),
529 BC_F_COPYIN|BC_F_SUSER },
530 { bridge_ioctl_gcache, sizeof(struct ifbrparam),
533 { bridge_ioctl_gifs, sizeof(struct ifbifconf),
534 BC_F_COPYIN|BC_F_COPYOUT },
535 { bridge_ioctl_rts, sizeof(struct ifbaconf),
536 BC_F_COPYIN|BC_F_COPYOUT },
538 { bridge_ioctl_saddr, sizeof(struct ifbareq),
539 BC_F_COPYIN|BC_F_SUSER },
541 { bridge_ioctl_sto, sizeof(struct ifbrparam),
542 BC_F_COPYIN|BC_F_SUSER },
543 { bridge_ioctl_gto, sizeof(struct ifbrparam),
546 { bridge_ioctl_daddr, sizeof(struct ifbareq),
547 BC_F_COPYIN|BC_F_SUSER },
549 { bridge_ioctl_flush, sizeof(struct ifbreq),
550 BC_F_COPYIN|BC_F_SUSER },
552 { bridge_ioctl_gpri, sizeof(struct ifbrparam),
554 { bridge_ioctl_spri, sizeof(struct ifbrparam),
555 BC_F_COPYIN|BC_F_SUSER },
557 { bridge_ioctl_ght, sizeof(struct ifbrparam),
559 { bridge_ioctl_sht, sizeof(struct ifbrparam),
560 BC_F_COPYIN|BC_F_SUSER },
562 { bridge_ioctl_gfd, sizeof(struct ifbrparam),
564 { bridge_ioctl_sfd, sizeof(struct ifbrparam),
565 BC_F_COPYIN|BC_F_SUSER },
567 { bridge_ioctl_gma, sizeof(struct ifbrparam),
569 { bridge_ioctl_sma, sizeof(struct ifbrparam),
570 BC_F_COPYIN|BC_F_SUSER },
572 { bridge_ioctl_sifprio, sizeof(struct ifbreq),
573 BC_F_COPYIN|BC_F_SUSER },
575 { bridge_ioctl_sifcost, sizeof(struct ifbreq),
576 BC_F_COPYIN|BC_F_SUSER },
578 { bridge_ioctl_addspan, sizeof(struct ifbreq),
579 BC_F_COPYIN|BC_F_SUSER },
580 { bridge_ioctl_delspan, sizeof(struct ifbreq),
581 BC_F_COPYIN|BC_F_SUSER },
583 { bridge_ioctl_sifbondwght, sizeof(struct ifbreq),
584 BC_F_COPYIN|BC_F_SUSER },
587 static const int bridge_control_table_size = NELEM(bridge_control_table);
589 LIST_HEAD(, bridge_softc) bridge_list;
591 struct if_clone bridge_cloner = IF_CLONE_INITIALIZER("bridge",
593 bridge_clone_destroy, 0, IF_MAXUNIT);
596 bridge_modevent(module_t mod, int type, void *data)
600 LIST_INIT(&bridge_list);
601 if_clone_attach(&bridge_cloner);
602 bridge_input_p = bridge_input;
603 bridge_output_p = bridge_output;
604 bridge_interface_p = bridge_interface;
605 bridge_detach_cookie = EVENTHANDLER_REGISTER(
606 ifnet_detach_event, bridge_ifdetach, NULL,
607 EVENTHANDLER_PRI_ANY);
609 bstp_linkstate_p = bstp_linkstate;
613 if (!LIST_EMPTY(&bridge_list))
615 EVENTHANDLER_DEREGISTER(ifnet_detach_event,
616 bridge_detach_cookie);
617 if_clone_detach(&bridge_cloner);
618 bridge_input_p = NULL;
619 bridge_output_p = NULL;
620 bridge_interface_p = NULL;
622 bstp_linkstate_p = NULL;
631 static moduledata_t bridge_mod = {
637 DECLARE_MODULE(if_bridge, bridge_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
641 * bridge_clone_create:
643 * Create a new bridge instance.
646 bridge_clone_create(struct if_clone *ifc, int unit, caddr_t param __unused)
648 struct bridge_softc *sc;
653 sc = kmalloc(sizeof(*sc), M_DEVBUF, M_WAITOK | M_ZERO);
654 ifp = sc->sc_ifp = &sc->sc_if;
656 sc->sc_brtmax = BRIDGE_RTABLE_MAX;
657 sc->sc_brttimeout = BRIDGE_RTABLE_TIMEOUT;
658 sc->sc_bridge_max_age = BSTP_DEFAULT_MAX_AGE;
659 sc->sc_bridge_hello_time = BSTP_DEFAULT_HELLO_TIME;
660 sc->sc_bridge_forward_delay = BSTP_DEFAULT_FORWARD_DELAY;
661 sc->sc_bridge_priority = BSTP_DEFAULT_BRIDGE_PRIORITY;
662 sc->sc_hold_time = BSTP_DEFAULT_HOLD_TIME;
664 /* Initialize our routing table. */
665 bridge_rtable_init(sc);
667 callout_init(&sc->sc_brcallout);
668 netmsg_init(&sc->sc_brtimemsg, NULL, &netisr_adone_rport,
669 MSGF_DROPABLE, bridge_timer_handler);
670 sc->sc_brtimemsg.lmsg.u.ms_resultp = sc;
672 callout_init(&sc->sc_bstpcallout);
673 netmsg_init(&sc->sc_bstptimemsg, NULL, &netisr_adone_rport,
674 MSGF_DROPABLE, bstp_tick_handler);
675 sc->sc_bstptimemsg.lmsg.u.ms_resultp = sc;
677 /* Initialize per-cpu member iface lists */
678 sc->sc_iflists = kmalloc(sizeof(*sc->sc_iflists) * ncpus,
680 for (cpu = 0; cpu < ncpus; ++cpu)
681 TAILQ_INIT(&sc->sc_iflists[cpu]);
683 TAILQ_INIT(&sc->sc_spanlist);
686 if_initname(ifp, ifc->ifc_name, unit);
687 ifp->if_mtu = ETHERMTU;
688 ifp->if_flags = IFF_BROADCAST | IFF_MULTICAST;
689 ifp->if_ioctl = bridge_ioctl;
690 ifp->if_start = bridge_start;
691 ifp->if_init = bridge_init;
692 ifp->if_type = IFT_ETHER;
693 ifq_set_maxlen(&ifp->if_snd, ifqmaxlen);
694 ifq_set_ready(&ifp->if_snd);
695 ifp->if_hdrlen = ETHER_HDR_LEN;
698 * Generate a random ethernet address and use the private AC:DE:48
702 bcopy(&rnd, &eaddr[0], 4); /* ETHER_ADDR_LEN == 6 */
704 bcopy(&rnd, &eaddr[2], 4); /* ETHER_ADDR_LEN == 6 */
706 eaddr[0] &= ~1; /* clear multicast bit */
707 eaddr[0] |= 2; /* set the LAA bit */
709 ether_ifattach(ifp, eaddr, NULL);
710 /* Now undo some of the damage... */
711 ifp->if_baudrate = 0;
712 /*ifp->if_type = IFT_BRIDGE;*/
714 crit_enter(); /* XXX MP */
715 LIST_INSERT_HEAD(&bridge_list, sc, sc_list);
722 bridge_delete_dispatch(netmsg_t msg)
724 struct bridge_softc *sc = msg->lmsg.u.ms_resultp;
725 struct ifnet *bifp = sc->sc_ifp;
726 struct bridge_iflist *bif;
728 ifnet_serialize_all(bifp);
730 while ((bif = TAILQ_FIRST(&sc->sc_iflists[mycpuid])) != NULL)
731 bridge_delete_member(sc, bif, 0);
733 while ((bif = TAILQ_FIRST(&sc->sc_spanlist)) != NULL)
734 bridge_delete_span(sc, bif);
736 ifnet_deserialize_all(bifp);
738 lwkt_replymsg(&msg->lmsg, 0);
742 * bridge_clone_destroy:
744 * Destroy a bridge instance.
747 bridge_clone_destroy(struct ifnet *ifp)
749 struct bridge_softc *sc = ifp->if_softc;
750 struct netmsg_base msg;
752 ifnet_serialize_all(ifp);
755 ifp->if_flags &= ~IFF_UP;
757 ifnet_deserialize_all(ifp);
759 netmsg_init(&msg, NULL, &curthread->td_msgport,
760 0, bridge_delete_dispatch);
761 msg.lmsg.u.ms_resultp = sc;
762 lwkt_domsg(BRIDGE_CFGPORT, &msg.lmsg, 0);
764 crit_enter(); /* XXX MP */
765 LIST_REMOVE(sc, sc_list);
770 /* Tear down the routing table. */
771 bridge_rtable_fini(sc);
773 /* Free per-cpu member iface lists */
774 kfree(sc->sc_iflists, M_DEVBUF);
784 * Handle a control request from the operator.
787 bridge_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr)
789 struct bridge_softc *sc = ifp->if_softc;
790 struct bridge_control_arg args;
791 struct ifdrv *ifd = (struct ifdrv *) data;
792 const struct bridge_control *bc;
795 ASSERT_IFNET_SERIALIZED_ALL(ifp);
804 if (ifd->ifd_cmd >= bridge_control_table_size) {
808 bc = &bridge_control_table[ifd->ifd_cmd];
810 if (cmd == SIOCGDRVSPEC &&
811 (bc->bc_flags & BC_F_COPYOUT) == 0) {
814 } else if (cmd == SIOCSDRVSPEC &&
815 (bc->bc_flags & BC_F_COPYOUT)) {
820 if (bc->bc_flags & BC_F_SUSER) {
821 error = priv_check_cred(cr, PRIV_ROOT, NULL_CRED_OKAY);
826 if (ifd->ifd_len != bc->bc_argsize ||
827 ifd->ifd_len > sizeof(args.bca_u)) {
832 memset(&args, 0, sizeof(args));
833 if (bc->bc_flags & BC_F_COPYIN) {
834 error = copyin(ifd->ifd_data, &args.bca_u,
840 error = bridge_control(sc, cmd, bc->bc_func, &args);
842 KKASSERT(args.bca_len == 0 && args.bca_kptr == NULL);
846 if (bc->bc_flags & BC_F_COPYOUT) {
847 error = copyout(&args, ifd->ifd_data, ifd->ifd_len);
848 if (args.bca_len != 0) {
849 KKASSERT(args.bca_kptr != NULL);
851 error = copyout(args.bca_kptr,
852 args.bca_uptr, args.bca_len);
854 kfree(args.bca_kptr, M_TEMP);
856 KKASSERT(args.bca_kptr == NULL);
859 KKASSERT(args.bca_len == 0 && args.bca_kptr == NULL);
864 if (!(ifp->if_flags & IFF_UP) &&
865 (ifp->if_flags & IFF_RUNNING)) {
867 * If interface is marked down and it is running,
871 } else if ((ifp->if_flags & IFF_UP) &&
872 !(ifp->if_flags & IFF_RUNNING)) {
874 * If interface is marked up and it is stopped, then
881 * If running and link flag state change we have to
882 * reinitialize as well.
884 if ((ifp->if_flags & IFF_RUNNING) &&
885 (ifp->if_flags & (IFF_LINK0|IFF_LINK1|IFF_LINK2)) !=
887 sc->sc_copy_flags = ifp->if_flags &
888 (IFF_LINK0|IFF_LINK1|IFF_LINK2);
889 bridge_control(sc, 0, bridge_ioctl_reinit, NULL);
895 /* Do not allow the MTU to be changed on the bridge */
900 error = ether_ioctl(ifp, cmd, data);
909 * Clear or restore unwanted capabilities on the member interface
912 bridge_mutecaps(struct bridge_ifinfo *bif_info, struct ifnet *ifp, int mute)
916 if (ifp->if_ioctl == NULL)
919 bzero(&ifr, sizeof(ifr));
920 ifr.ifr_reqcap = ifp->if_capenable;
923 /* mask off and save capabilities */
924 bif_info->bifi_mutecap = ifr.ifr_reqcap & BRIDGE_IFCAPS_MASK;
925 if (bif_info->bifi_mutecap != 0)
926 ifr.ifr_reqcap &= ~BRIDGE_IFCAPS_MASK;
928 /* restore muted capabilities */
929 ifr.ifr_reqcap |= bif_info->bifi_mutecap;
932 if (bif_info->bifi_mutecap != 0) {
933 ifnet_serialize_all(ifp);
934 ifp->if_ioctl(ifp, SIOCSIFCAP, (caddr_t)&ifr, NULL);
935 ifnet_deserialize_all(ifp);
940 * bridge_lookup_member:
942 * Lookup a bridge member interface.
944 static struct bridge_iflist *
945 bridge_lookup_member(struct bridge_softc *sc, const char *name)
947 struct bridge_iflist *bif;
949 TAILQ_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next) {
950 if (strcmp(bif->bif_ifp->if_xname, name) == 0)
957 * bridge_lookup_member_if:
959 * Lookup a bridge member interface by ifnet*.
961 static struct bridge_iflist *
962 bridge_lookup_member_if(struct bridge_softc *sc, struct ifnet *member_ifp)
964 struct bridge_iflist *bif;
966 TAILQ_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next) {
967 if (bif->bif_ifp == member_ifp)
974 * bridge_lookup_member_ifinfo:
976 * Lookup a bridge member interface by bridge_ifinfo.
978 static struct bridge_iflist *
979 bridge_lookup_member_ifinfo(struct bridge_softc *sc,
980 struct bridge_ifinfo *bif_info)
982 struct bridge_iflist *bif;
984 TAILQ_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next) {
985 if (bif->bif_info == bif_info)
992 * bridge_delete_member:
994 * Delete the specified member interface.
997 bridge_delete_member(struct bridge_softc *sc, struct bridge_iflist *bif,
1000 struct ifnet *ifs = bif->bif_ifp;
1001 struct ifnet *bifp = sc->sc_ifp;
1002 struct bridge_ifinfo *bif_info = bif->bif_info;
1003 struct bridge_iflist_head saved_bifs;
1005 ASSERT_IFNET_SERIALIZED_ALL(bifp);
1006 KKASSERT(bif_info != NULL);
1008 ifs->if_bridge = NULL;
1011 * Release bridge interface's serializer:
1012 * - To avoid possible dead lock.
1013 * - Various sync operation will block the current thread.
1015 ifnet_deserialize_all(bifp);
1018 switch (ifs->if_type) {
1022 * Take the interface out of promiscuous mode.
1025 bridge_mutecaps(bif_info, ifs, 0);
1032 panic("bridge_delete_member: impossible");
1038 * Remove bifs from percpu linked list.
1040 * Removed bifs are not freed immediately, instead,
1041 * they are saved in saved_bifs. They will be freed
1042 * after we make sure that no one is accessing them,
1043 * i.e. after following netmsg_service_sync()
1045 TAILQ_INIT(&saved_bifs);
1046 bridge_del_bif(sc, bif_info, &saved_bifs);
1049 * Make sure that all protocol threads:
1050 * o see 'ifs' if_bridge is changed
1051 * o know that bif is removed from the percpu linked list
1053 netmsg_service_sync();
1056 * Free the removed bifs
1058 KKASSERT(!TAILQ_EMPTY(&saved_bifs));
1059 while ((bif = TAILQ_FIRST(&saved_bifs)) != NULL) {
1060 TAILQ_REMOVE(&saved_bifs, bif, bif_next);
1061 kfree(bif, M_DEVBUF);
1064 /* See the comment in bridge_ioctl_stop() */
1065 bridge_rtmsg_sync(sc);
1066 bridge_rtdelete(sc, ifs, IFBF_FLUSHALL | IFBF_FLUSHSYNC);
1068 ifnet_serialize_all(bifp);
1070 if (bifp->if_flags & IFF_RUNNING)
1071 bstp_initialization(sc);
1074 * Free the bif_info after bstp_initialization(), so that
1075 * bridge_softc.sc_root_port will not reference a dangling
1078 kfree(bif_info, M_DEVBUF);
1082 * bridge_delete_span:
1084 * Delete the specified span interface.
1087 bridge_delete_span(struct bridge_softc *sc, struct bridge_iflist *bif)
1089 KASSERT(bif->bif_ifp->if_bridge == NULL,
1090 ("%s: not a span interface", __func__));
1092 TAILQ_REMOVE(&sc->sc_iflists[mycpuid], bif, bif_next);
1093 kfree(bif, M_DEVBUF);
1097 bridge_ioctl_init(struct bridge_softc *sc, void *arg __unused)
1099 struct ifnet *ifp = sc->sc_ifp;
1101 if (ifp->if_flags & IFF_RUNNING)
1104 callout_reset(&sc->sc_brcallout, bridge_rtable_prune_period * hz,
1107 ifp->if_flags |= IFF_RUNNING;
1108 bstp_initialization(sc);
1113 bridge_ioctl_stop(struct bridge_softc *sc, void *arg __unused)
1115 struct ifnet *ifp = sc->sc_ifp;
1116 struct lwkt_msg *lmsg;
1118 if ((ifp->if_flags & IFF_RUNNING) == 0)
1121 callout_stop(&sc->sc_brcallout);
1124 lmsg = &sc->sc_brtimemsg.lmsg;
1125 if ((lmsg->ms_flags & MSGF_DONE) == 0) {
1126 /* Pending to be processed; drop it */
1133 ifp->if_flags &= ~IFF_RUNNING;
1135 ifnet_deserialize_all(ifp);
1137 /* Let everyone know that we are stopped */
1138 netmsg_service_sync();
1141 * Sync ifnetX msgports in the order we forward rtnode
1142 * installation message. This is used to make sure that
1143 * all rtnode installation messages sent by bridge_rtupdate()
1144 * during above netmsg_service_sync() are flushed.
1146 bridge_rtmsg_sync(sc);
1147 bridge_rtflush(sc, IFBF_FLUSHDYN | IFBF_FLUSHSYNC);
1149 ifnet_serialize_all(ifp);
1154 bridge_ioctl_add(struct bridge_softc *sc, void *arg)
1156 struct ifbreq *req = arg;
1157 struct bridge_iflist *bif;
1158 struct bridge_ifinfo *bif_info;
1159 struct ifnet *ifs, *bifp;
1163 ASSERT_IFNET_SERIALIZED_ALL(bifp);
1165 ifs = ifunit(req->ifbr_ifsname);
1169 /* If it's in the span list, it can't be a member. */
1170 TAILQ_FOREACH(bif, &sc->sc_spanlist, bif_next)
1171 if (ifs == bif->bif_ifp)
1174 /* Allow the first Ethernet member to define the MTU */
1175 if (ifs->if_type != IFT_GIF) {
1176 if (TAILQ_EMPTY(&sc->sc_iflists[mycpuid])) {
1177 bifp->if_mtu = ifs->if_mtu;
1178 } else if (bifp->if_mtu != ifs->if_mtu) {
1179 if_printf(bifp, "invalid MTU for %s\n", ifs->if_xname);
1184 if (ifs->if_bridge == sc)
1187 if (ifs->if_bridge != NULL)
1190 bif_info = kmalloc(sizeof(*bif_info), M_DEVBUF, M_WAITOK | M_ZERO);
1191 bif_info->bifi_priority = BSTP_DEFAULT_PORT_PRIORITY;
1192 bif_info->bifi_path_cost = BSTP_DEFAULT_PATH_COST;
1193 bif_info->bifi_ifp = ifs;
1194 bif_info->bifi_bond_weight = 1;
1197 * Release bridge interface's serializer:
1198 * - To avoid possible dead lock.
1199 * - Various sync operation will block the current thread.
1201 ifnet_deserialize_all(bifp);
1203 switch (ifs->if_type) {
1207 * Place the interface into promiscuous mode.
1209 error = ifpromisc(ifs, 1);
1211 ifnet_serialize_all(bifp);
1214 bridge_mutecaps(bif_info, ifs, 1);
1217 case IFT_GIF: /* :^) */
1222 ifnet_serialize_all(bifp);
1227 * Add bifs to percpu linked lists
1229 bridge_add_bif(sc, bif_info, ifs);
1231 ifnet_serialize_all(bifp);
1233 if (bifp->if_flags & IFF_RUNNING)
1234 bstp_initialization(sc);
1239 * Everything has been setup, so let the member interface
1240 * deliver packets to this bridge on its input/output path.
1242 ifs->if_bridge = sc;
1245 if (bif_info != NULL)
1246 kfree(bif_info, M_DEVBUF);
1252 bridge_ioctl_del(struct bridge_softc *sc, void *arg)
1254 struct ifbreq *req = arg;
1255 struct bridge_iflist *bif;
1257 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1261 bridge_delete_member(sc, bif, 0);
1267 bridge_ioctl_gifflags(struct bridge_softc *sc, void *arg)
1269 struct ifbreq *req = arg;
1270 struct bridge_iflist *bif;
1272 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1275 bridge_ioctl_fillflags(sc, bif, req);
1280 bridge_ioctl_fillflags(struct bridge_softc *sc, struct bridge_iflist *bif,
1283 req->ifbr_ifsflags = bif->bif_flags;
1284 req->ifbr_state = bif->bif_state;
1285 req->ifbr_priority = bif->bif_priority;
1286 req->ifbr_path_cost = bif->bif_path_cost;
1287 req->ifbr_bond_weight = bif->bif_bond_weight;
1288 req->ifbr_portno = bif->bif_ifp->if_index & 0xff;
1289 if (bif->bif_flags & IFBIF_STP) {
1290 req->ifbr_peer_root = bif->bif_peer_root;
1291 req->ifbr_peer_bridge = bif->bif_peer_bridge;
1292 req->ifbr_peer_cost = bif->bif_peer_cost;
1293 req->ifbr_peer_port = bif->bif_peer_port;
1294 if (bstp_supersedes_port_info(sc, bif)) {
1295 req->ifbr_designated_root = bif->bif_peer_root;
1296 req->ifbr_designated_bridge = bif->bif_peer_bridge;
1297 req->ifbr_designated_cost = bif->bif_peer_cost;
1298 req->ifbr_designated_port = bif->bif_peer_port;
1300 req->ifbr_designated_root = sc->sc_bridge_id;
1301 req->ifbr_designated_bridge = sc->sc_bridge_id;
1302 req->ifbr_designated_cost = bif->bif_path_cost +
1304 req->ifbr_designated_port = bif->bif_port_id;
1307 req->ifbr_peer_root = 0;
1308 req->ifbr_peer_bridge = 0;
1309 req->ifbr_peer_cost = 0;
1310 req->ifbr_peer_port = 0;
1311 req->ifbr_designated_root = 0;
1312 req->ifbr_designated_bridge = 0;
1313 req->ifbr_designated_cost = 0;
1314 req->ifbr_designated_port = 0;
1319 bridge_ioctl_sifflags(struct bridge_softc *sc, void *arg)
1321 struct ifbreq *req = arg;
1322 struct bridge_iflist *bif;
1323 struct ifnet *bifp = sc->sc_ifp;
1325 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1329 if (req->ifbr_ifsflags & IFBIF_SPAN) {
1330 /* SPAN is readonly */
1334 if (req->ifbr_ifsflags & IFBIF_STP) {
1335 switch (bif->bif_ifp->if_type) {
1337 /* These can do spanning tree. */
1341 /* Nothing else can. */
1346 bif->bif_flags = (bif->bif_flags & IFBIF_KEEPMASK) |
1347 (req->ifbr_ifsflags & ~IFBIF_KEEPMASK);
1348 if (bifp->if_flags & IFF_RUNNING)
1349 bstp_initialization(sc);
1355 bridge_ioctl_scache(struct bridge_softc *sc, void *arg)
1357 struct ifbrparam *param = arg;
1358 struct ifnet *ifp = sc->sc_ifp;
1360 sc->sc_brtmax = param->ifbrp_csize;
1362 ifnet_deserialize_all(ifp);
1364 ifnet_serialize_all(ifp);
1370 bridge_ioctl_gcache(struct bridge_softc *sc, void *arg)
1372 struct ifbrparam *param = arg;
1374 param->ifbrp_csize = sc->sc_brtmax;
1380 bridge_ioctl_gifs(struct bridge_softc *sc, void *arg)
1382 struct bridge_control_arg *bc_arg = arg;
1383 struct ifbifconf *bifc = arg;
1384 struct bridge_iflist *bif;
1385 struct ifbreq *breq;
1389 TAILQ_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next)
1391 TAILQ_FOREACH(bif, &sc->sc_spanlist, bif_next)
1394 if (bifc->ifbic_len == 0) {
1395 bifc->ifbic_len = sizeof(*breq) * count;
1397 } else if (count == 0 || bifc->ifbic_len < sizeof(*breq)) {
1398 bifc->ifbic_len = 0;
1402 len = min(bifc->ifbic_len, sizeof(*breq) * count);
1403 KKASSERT(len >= sizeof(*breq));
1405 breq = kmalloc(len, M_TEMP, M_WAITOK | M_NULLOK | M_ZERO);
1407 bifc->ifbic_len = 0;
1410 bc_arg->bca_kptr = breq;
1413 TAILQ_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next) {
1414 if (len < sizeof(*breq))
1417 strlcpy(breq->ifbr_ifsname, bif->bif_ifp->if_xname,
1418 sizeof(breq->ifbr_ifsname));
1419 bridge_ioctl_fillflags(sc, bif, breq);
1422 len -= sizeof(*breq);
1424 TAILQ_FOREACH(bif, &sc->sc_spanlist, bif_next) {
1425 if (len < sizeof(*breq))
1428 strlcpy(breq->ifbr_ifsname, bif->bif_ifp->if_xname,
1429 sizeof(breq->ifbr_ifsname));
1430 breq->ifbr_ifsflags = bif->bif_flags;
1431 breq->ifbr_portno = bif->bif_ifp->if_index & 0xff;
1434 len -= sizeof(*breq);
1437 bifc->ifbic_len = sizeof(*breq) * count;
1438 KKASSERT(bifc->ifbic_len > 0);
1440 bc_arg->bca_len = bifc->ifbic_len;
1441 bc_arg->bca_uptr = bifc->ifbic_req;
1446 bridge_ioctl_rts(struct bridge_softc *sc, void *arg)
1448 struct bridge_control_arg *bc_arg = arg;
1449 struct ifbaconf *bac = arg;
1450 struct bridge_rtnode *brt;
1451 struct ifbareq *bareq;
1455 LIST_FOREACH(brt, &sc->sc_rtlists[mycpuid], brt_list)
1458 if (bac->ifbac_len == 0) {
1459 bac->ifbac_len = sizeof(*bareq) * count;
1461 } else if (count == 0 || bac->ifbac_len < sizeof(*bareq)) {
1466 len = min(bac->ifbac_len, sizeof(*bareq) * count);
1467 KKASSERT(len >= sizeof(*bareq));
1469 bareq = kmalloc(len, M_TEMP, M_WAITOK | M_NULLOK | M_ZERO);
1470 if (bareq == NULL) {
1474 bc_arg->bca_kptr = bareq;
1477 LIST_FOREACH(brt, &sc->sc_rtlists[mycpuid], brt_list) {
1478 struct bridge_rtinfo *bri = brt->brt_info;
1479 unsigned long expire;
1481 if (len < sizeof(*bareq))
1484 strlcpy(bareq->ifba_ifsname, bri->bri_ifp->if_xname,
1485 sizeof(bareq->ifba_ifsname));
1486 memcpy(bareq->ifba_dst, brt->brt_addr, sizeof(brt->brt_addr));
1487 expire = bri->bri_expire;
1488 if ((bri->bri_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC &&
1489 time_second < expire)
1490 bareq->ifba_expire = expire - time_second;
1492 bareq->ifba_expire = 0;
1493 bareq->ifba_flags = bri->bri_flags;
1496 len -= sizeof(*bareq);
1499 bac->ifbac_len = sizeof(*bareq) * count;
1500 KKASSERT(bac->ifbac_len > 0);
1502 bc_arg->bca_len = bac->ifbac_len;
1503 bc_arg->bca_uptr = bac->ifbac_req;
1508 bridge_ioctl_saddr(struct bridge_softc *sc, void *arg)
1510 struct ifbareq *req = arg;
1511 struct bridge_iflist *bif;
1512 struct ifnet *ifp = sc->sc_ifp;
1515 ASSERT_IFNET_SERIALIZED_ALL(ifp);
1517 bif = bridge_lookup_member(sc, req->ifba_ifsname);
1521 ifnet_deserialize_all(ifp);
1522 error = bridge_rtsaddr(sc, req->ifba_dst, bif->bif_ifp,
1524 ifnet_serialize_all(ifp);
1529 bridge_ioctl_sto(struct bridge_softc *sc, void *arg)
1531 struct ifbrparam *param = arg;
1533 sc->sc_brttimeout = param->ifbrp_ctime;
1539 bridge_ioctl_gto(struct bridge_softc *sc, void *arg)
1541 struct ifbrparam *param = arg;
1543 param->ifbrp_ctime = sc->sc_brttimeout;
1549 bridge_ioctl_daddr(struct bridge_softc *sc, void *arg)
1551 struct ifbareq *req = arg;
1552 struct ifnet *ifp = sc->sc_ifp;
1555 ifnet_deserialize_all(ifp);
1556 error = bridge_rtdaddr(sc, req->ifba_dst);
1557 ifnet_serialize_all(ifp);
1562 bridge_ioctl_flush(struct bridge_softc *sc, void *arg)
1564 struct ifbreq *req = arg;
1565 struct ifnet *ifp = sc->sc_ifp;
1567 ifnet_deserialize_all(ifp);
1568 bridge_rtflush(sc, req->ifbr_ifsflags | IFBF_FLUSHSYNC);
1569 ifnet_serialize_all(ifp);
1575 bridge_ioctl_gpri(struct bridge_softc *sc, void *arg)
1577 struct ifbrparam *param = arg;
1579 param->ifbrp_prio = sc->sc_bridge_priority;
1585 bridge_ioctl_spri(struct bridge_softc *sc, void *arg)
1587 struct ifbrparam *param = arg;
1589 sc->sc_bridge_priority = param->ifbrp_prio;
1591 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1592 bstp_initialization(sc);
1598 bridge_ioctl_reinit(struct bridge_softc *sc, void *arg __unused)
1600 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1601 bstp_initialization(sc);
1606 bridge_ioctl_ght(struct bridge_softc *sc, void *arg)
1608 struct ifbrparam *param = arg;
1610 param->ifbrp_hellotime = sc->sc_bridge_hello_time >> 8;
1616 bridge_ioctl_sht(struct bridge_softc *sc, void *arg)
1618 struct ifbrparam *param = arg;
1620 if (param->ifbrp_hellotime == 0)
1622 sc->sc_bridge_hello_time = param->ifbrp_hellotime << 8;
1624 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1625 bstp_initialization(sc);
1631 bridge_ioctl_gfd(struct bridge_softc *sc, void *arg)
1633 struct ifbrparam *param = arg;
1635 param->ifbrp_fwddelay = sc->sc_bridge_forward_delay >> 8;
1641 bridge_ioctl_sfd(struct bridge_softc *sc, void *arg)
1643 struct ifbrparam *param = arg;
1645 if (param->ifbrp_fwddelay == 0)
1647 sc->sc_bridge_forward_delay = param->ifbrp_fwddelay << 8;
1649 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1650 bstp_initialization(sc);
1656 bridge_ioctl_gma(struct bridge_softc *sc, void *arg)
1658 struct ifbrparam *param = arg;
1660 param->ifbrp_maxage = sc->sc_bridge_max_age >> 8;
1666 bridge_ioctl_sma(struct bridge_softc *sc, void *arg)
1668 struct ifbrparam *param = arg;
1670 if (param->ifbrp_maxage == 0)
1672 sc->sc_bridge_max_age = param->ifbrp_maxage << 8;
1674 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1675 bstp_initialization(sc);
1681 bridge_ioctl_sifprio(struct bridge_softc *sc, void *arg)
1683 struct ifbreq *req = arg;
1684 struct bridge_iflist *bif;
1686 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1690 bif->bif_priority = req->ifbr_priority;
1692 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1693 bstp_initialization(sc);
1699 bridge_ioctl_sifcost(struct bridge_softc *sc, void *arg)
1701 struct ifbreq *req = arg;
1702 struct bridge_iflist *bif;
1704 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1708 bif->bif_path_cost = req->ifbr_path_cost;
1710 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1711 bstp_initialization(sc);
1717 bridge_ioctl_sifbondwght(struct bridge_softc *sc, void *arg)
1719 struct ifbreq *req = arg;
1720 struct bridge_iflist *bif;
1722 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1726 bif->bif_bond_weight = req->ifbr_bond_weight;
1728 /* no reinit needed */
1734 bridge_ioctl_addspan(struct bridge_softc *sc, void *arg)
1736 struct ifbreq *req = arg;
1737 struct bridge_iflist *bif;
1739 struct bridge_ifinfo *bif_info;
1741 ifs = ifunit(req->ifbr_ifsname);
1745 TAILQ_FOREACH(bif, &sc->sc_spanlist, bif_next)
1746 if (ifs == bif->bif_ifp)
1749 if (ifs->if_bridge != NULL)
1752 switch (ifs->if_type) {
1763 * bif_info is needed for bif_flags
1765 bif_info = kmalloc(sizeof(*bif_info), M_DEVBUF, M_WAITOK | M_ZERO);
1766 bif_info->bifi_ifp = ifs;
1768 bif = kmalloc(sizeof(*bif), M_DEVBUF, M_WAITOK | M_ZERO);
1770 bif->bif_info = bif_info;
1771 bif->bif_flags = IFBIF_SPAN;
1772 /* NOTE: span bif does not need bridge_ifinfo */
1774 TAILQ_INSERT_HEAD(&sc->sc_spanlist, bif, bif_next);
1782 bridge_ioctl_delspan(struct bridge_softc *sc, void *arg)
1784 struct ifbreq *req = arg;
1785 struct bridge_iflist *bif;
1788 ifs = ifunit(req->ifbr_ifsname);
1792 TAILQ_FOREACH(bif, &sc->sc_spanlist, bif_next)
1793 if (ifs == bif->bif_ifp)
1799 bridge_delete_span(sc, bif);
1801 if (TAILQ_EMPTY(&sc->sc_spanlist))
1808 bridge_ifdetach_dispatch(netmsg_t msg)
1810 struct ifnet *ifp, *bifp;
1811 struct bridge_softc *sc;
1812 struct bridge_iflist *bif;
1814 ifp = msg->lmsg.u.ms_resultp;
1815 sc = ifp->if_bridge;
1817 /* Check if the interface is a bridge member */
1821 ifnet_serialize_all(bifp);
1823 bif = bridge_lookup_member_if(sc, ifp);
1825 bridge_delete_member(sc, bif, 1);
1827 /* XXX Why bif will be NULL? */
1830 ifnet_deserialize_all(bifp);
1834 crit_enter(); /* XXX MP */
1836 /* Check if the interface is a span port */
1837 LIST_FOREACH(sc, &bridge_list, sc_list) {
1840 ifnet_serialize_all(bifp);
1842 TAILQ_FOREACH(bif, &sc->sc_spanlist, bif_next)
1843 if (ifp == bif->bif_ifp) {
1844 bridge_delete_span(sc, bif);
1848 ifnet_deserialize_all(bifp);
1854 lwkt_replymsg(&msg->lmsg, 0);
1860 * Detach an interface from a bridge. Called when a member
1861 * interface is detaching.
1864 bridge_ifdetach(void *arg __unused, struct ifnet *ifp)
1866 struct netmsg_base msg;
1868 netmsg_init(&msg, NULL, &curthread->td_msgport,
1869 0, bridge_ifdetach_dispatch);
1870 msg.lmsg.u.ms_resultp = ifp;
1872 lwkt_domsg(BRIDGE_CFGPORT, &msg.lmsg, 0);
1878 * Initialize a bridge interface.
1881 bridge_init(void *xsc)
1883 bridge_control(xsc, SIOCSIFFLAGS, bridge_ioctl_init, NULL);
1889 * Stop the bridge interface.
1892 bridge_stop(struct ifnet *ifp)
1894 bridge_control(ifp->if_softc, SIOCSIFFLAGS, bridge_ioctl_stop, NULL);
1898 * Returns TRUE if the packet is being sent 'from us'... from our bridge
1899 * interface or from any member of our bridge interface. This is used
1900 * later on to force the MAC to be the MAC of our bridge interface.
1903 bridge_from_us(struct bridge_softc *sc, struct ether_header *eh)
1905 struct bridge_iflist *bif;
1907 if (memcmp(eh->ether_shost, IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN) == 0)
1910 TAILQ_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next) {
1911 if (memcmp(eh->ether_shost, IF_LLADDR(bif->bif_ifp),
1912 ETHER_ADDR_LEN) == 0) {
1922 * Enqueue a packet on a bridge member interface.
1926 bridge_enqueue(struct ifnet *dst_ifp, struct mbuf *m)
1928 struct netmsg_packet *nmp;
1932 nmp = &m->m_hdr.mh_netmsg;
1933 netmsg_init(&nmp->base, NULL, &netisr_apanic_rport,
1934 0, bridge_enqueue_handler);
1936 nmp->base.lmsg.u.ms_resultp = dst_ifp;
1938 lwkt_sendmsg(netisr_portfn(mycpu->gd_cpuid), &nmp->base.lmsg);
1942 * After looking up dst_if in our forwarding table we still have to
1943 * deal with channel bonding. Find the best interface in the bonding set.
1945 static struct ifnet *
1946 bridge_select_unicast(struct bridge_softc *sc, struct ifnet *dst_if,
1947 int from_blocking, struct mbuf *m)
1949 struct bridge_iflist *bif, *nbif;
1950 struct ifnet *alt_if;
1955 * Unicast, kinda replicates the output side of bridge_output().
1957 * Even though this is a uni-cast packet we may have to select
1958 * an interface from a bonding set.
1960 bif = bridge_lookup_member_if(sc, dst_if);
1962 /* Not a member of the bridge (anymore?) */
1967 * If STP is enabled on the target we are an equal opportunity
1968 * employer and do not necessarily output to dst_if. Instead
1969 * scan available links with the same MAC as the current dst_if
1970 * and choose the best one.
1972 * We also need to do this because arp entries tag onto a particular
1973 * interface and if it happens to be dead then the packets will
1974 * go into a bit bucket.
1976 * If LINK2 is set the matching links are bonded and we-round robin.
1977 * (the MAC address must be the same for the participating links).
1978 * In this case links in a STP FORWARDING or BONDED state are
1979 * allowed for unicast packets.
1981 if (bif->bif_flags & IFBIF_STP) {
1986 TAILQ_FOREACH_MUTABLE(bif, &sc->sc_iflists[mycpuid],
1989 * dst_if may imply a bonding set so we must compare
1992 if (memcmp(IF_LLADDR(bif->bif_ifp),
1994 ETHER_ADDR_LEN) != 0) {
1998 if ((bif->bif_ifp->if_flags & IFF_RUNNING) == 0)
2002 * NOTE: We allow tranmissions through a BLOCKING
2003 * or LEARNING interface only as a last resort.
2004 * We DISALLOW both cases if the receiving
2006 * NOTE: If we send a packet through a learning
2007 * interface the receiving end (if also in
2008 * LEARNING) will throw it away, so this is
2009 * the ultimate last resort.
2011 switch(bif->bif_state) {
2012 case BSTP_IFSTATE_BLOCKING:
2013 if (from_blocking == 0 &&
2014 bif->bif_priority + 256 > alt_priority) {
2015 alt_priority = bif->bif_priority + 256;
2016 alt_if = bif->bif_ifp;
2019 case BSTP_IFSTATE_LEARNING:
2020 if (from_blocking == 0 &&
2021 bif->bif_priority > alt_priority) {
2022 alt_priority = bif->bif_priority;
2023 alt_if = bif->bif_ifp;
2026 case BSTP_IFSTATE_L1BLOCKING:
2027 case BSTP_IFSTATE_LISTENING:
2028 case BSTP_IFSTATE_DISABLED:
2031 /* FORWARDING, BONDED */
2036 * XXX we need to use the toepliz hash or
2037 * something like that instead of
2040 if (sc->sc_ifp->if_flags & IFF_LINK2) {
2041 dst_if = bif->bif_ifp;
2042 if (++bif->bif_bond_count >=
2043 bif->bif_bond_weight) {
2044 bif->bif_bond_count = 0;
2045 TAILQ_REMOVE(&sc->sc_iflists[mycpuid],
2048 &sc->sc_iflists[mycpuid],
2056 * Select best interface in the FORWARDING or
2057 * BONDED set. Well, there shouldn't be any
2058 * in a BONDED state if LINK2 is not set (they
2059 * will all be in a BLOCKING) state, but there
2060 * could be a transitory condition here.
2062 if (bif->bif_priority > priority) {
2063 priority = bif->bif_priority;
2064 dst_if = bif->bif_ifp;
2069 * If no suitable interfaces were found but a suitable
2070 * alternative interface was found, use the alternative
2073 if (priority == 0 && alt_if)
2078 * At this point, we're dealing with a unicast frame
2079 * going to a different interface.
2081 if ((dst_if->if_flags & IFF_RUNNING) == 0)
2090 * Send output from a bridge member interface. This
2091 * performs the bridging function for locally originated
2094 * The mbuf has the Ethernet header already attached. We must
2095 * enqueue or free the mbuf before returning.
2098 bridge_output(struct ifnet *ifp, struct mbuf *m)
2100 struct bridge_softc *sc = ifp->if_bridge;
2101 struct bridge_iflist *bif, *nbif;
2102 struct ether_header *eh;
2103 struct ifnet *dst_if, *alt_if, *bifp;
2107 ASSERT_IFNET_NOT_SERIALIZED_ALL(ifp);
2111 * Make sure that we are still a member of a bridge interface.
2122 if (m->m_len < ETHER_HDR_LEN) {
2123 m = m_pullup(m, ETHER_HDR_LEN);
2125 IFNET_STAT_INC(bifp, oerrors, 1);
2129 eh = mtod(m, struct ether_header *);
2130 from_us = bridge_from_us(sc, eh);
2133 * If bridge is down, but the original output interface is up,
2134 * go ahead and send out that interface. Otherwise, the packet
2137 if ((bifp->if_flags & IFF_RUNNING) == 0) {
2143 * If the packet is a multicast, or we don't know a better way to
2144 * get there, send to all interfaces.
2146 if (ETHER_IS_MULTICAST(eh->ether_dhost))
2149 dst_if = bridge_rtlookup(sc, eh->ether_dhost);
2151 if (dst_if == NULL) {
2161 TAILQ_FOREACH_MUTABLE(bif, &sc->sc_iflists[mycpuid],
2163 dst_if = bif->bif_ifp;
2165 if ((dst_if->if_flags & IFF_RUNNING) == 0)
2169 * If this is not the original output interface,
2170 * and the interface is participating in spanning
2171 * tree, make sure the port is in a state that
2172 * allows forwarding.
2174 * We keep track of a possible backup IF if we are
2175 * unable to find any interfaces to forward through.
2177 * NOTE: Currently round-robining is not implemented
2178 * across bonded interface groups (needs an
2179 * algorithm to track each group somehow).
2181 * Similarly we track only one alternative
2182 * interface if no suitable interfaces are
2185 if (dst_if != ifp &&
2186 (bif->bif_flags & IFBIF_STP) != 0) {
2187 switch (bif->bif_state) {
2188 case BSTP_IFSTATE_BONDED:
2189 if (bif->bif_priority + 512 >
2192 bif->bif_priority + 512;
2193 alt_if = bif->bif_ifp;
2196 case BSTP_IFSTATE_BLOCKING:
2197 if (bif->bif_priority + 256 >
2200 bif->bif_priority + 256;
2201 alt_if = bif->bif_ifp;
2204 case BSTP_IFSTATE_LEARNING:
2205 if (bif->bif_priority > alt_priority) {
2208 alt_if = bif->bif_ifp;
2211 case BSTP_IFSTATE_L1BLOCKING:
2212 case BSTP_IFSTATE_LISTENING:
2213 case BSTP_IFSTATE_DISABLED:
2221 KKASSERT(used == 0);
2222 if (TAILQ_NEXT(bif, bif_next) == NULL) {
2226 mc = m_copypacket(m, MB_DONTWAIT);
2228 IFNET_STAT_INC(bifp, oerrors, 1);
2234 * If the packet is 'from' us override ether_shost.
2236 bridge_handoff(sc, dst_if, mc, from_us);
2239 if (nbif != NULL && !nbif->bif_onlist) {
2240 KKASSERT(bif->bif_onlist);
2241 nbif = TAILQ_NEXT(bif, bif_next);
2246 * If we couldn't find anything use the backup interface
2249 if (found == 0 && alt_if) {
2250 KKASSERT(used == 0);
2253 bridge_handoff(sc, alt_if, mc, from_us);
2265 dst_if = bridge_select_unicast(sc, dst_if, 0, m);
2272 bridge_handoff(sc, dst_if, m, from_us);
2277 * Returns the bridge interface associated with an ifc.
2278 * Pass ifp->if_bridge (must not be NULL). Used by the ARP
2279 * code to supply the bridge for the is-at info, making
2280 * the bridge responsible for matching local addresses.
2282 * Without this the ARP code will supply bridge member interfaces
2283 * for the is-at which makes it difficult the bridge to fail-over
2284 * interfaces (amoung other things).
2286 static struct ifnet *
2287 bridge_interface(void *if_bridge)
2289 struct bridge_softc *sc = if_bridge;
2290 return (sc->sc_ifp);
2296 * Start output on a bridge.
2299 bridge_start(struct ifnet *ifp, struct ifaltq_subque *ifsq)
2301 struct bridge_softc *sc = ifp->if_softc;
2303 ASSERT_ALTQ_SQ_DEFAULT(ifp, ifsq);
2304 ASSERT_IFNET_SERIALIZED_TX(ifp, ifsq);
2306 ifsq_set_oactive(ifsq);
2308 struct ifnet *dst_if = NULL;
2309 struct ether_header *eh;
2312 m = ifsq_dequeue(ifsq, NULL);
2317 if (m->m_len < sizeof(*eh)) {
2318 m = m_pullup(m, sizeof(*eh));
2320 IFNET_STAT_INC(ifp, oerrors, 1);
2324 eh = mtod(m, struct ether_header *);
2327 IFNET_STAT_INC(ifp, opackets, 1);
2329 if ((m->m_flags & (M_BCAST|M_MCAST)) == 0)
2330 dst_if = bridge_rtlookup(sc, eh->ether_dhost);
2333 * Multicast or broadcast
2335 if (dst_if == NULL) {
2336 bridge_start_bcast(sc, m);
2343 dst_if = bridge_select_unicast(sc, dst_if, 0, m);
2348 bridge_enqueue(dst_if, m);
2350 ifsq_clr_oactive(ifsq);
2356 * Forward packets received on a bridge interface via the input
2359 * This implements the forwarding function of the bridge.
2362 bridge_forward(struct bridge_softc *sc, struct mbuf *m)
2364 struct bridge_iflist *bif;
2365 struct ifnet *src_if, *dst_if, *ifp;
2366 struct ether_header *eh;
2370 src_if = m->m_pkthdr.rcvif;
2373 ASSERT_IFNET_NOT_SERIALIZED_ALL(ifp);
2375 IFNET_STAT_INC(ifp, ipackets, 1);
2376 IFNET_STAT_INC(ifp, ibytes, m->m_pkthdr.len);
2379 * Look up the bridge_iflist.
2381 bif = bridge_lookup_member_if(sc, src_if);
2383 /* Interface is not a bridge member (anymore?) */
2389 * In spanning tree mode receiving a packet from an interface
2390 * in a BLOCKING state is allowed, it could be a member of last
2391 * resort from the sender's point of view, but forwarding it is
2394 * The sender's spanning tree will eventually sync up and the
2395 * sender will go into a BLOCKING state too (but this still may be
2396 * an interface of last resort during state changes).
2398 if (bif->bif_flags & IFBIF_STP) {
2399 switch (bif->bif_state) {
2400 case BSTP_IFSTATE_L1BLOCKING:
2401 case BSTP_IFSTATE_LISTENING:
2402 case BSTP_IFSTATE_DISABLED:
2406 /* learning, blocking, bonded, forwarding */
2410 from_blocking = (bif->bif_state == BSTP_IFSTATE_BLOCKING);
2412 eh = mtod(m, struct ether_header *);
2415 * If the interface is learning, and the source
2416 * address is valid and not multicast, record
2419 if ((bif->bif_flags & IFBIF_LEARNING) != 0 &&
2420 from_blocking == 0 &&
2421 ETHER_IS_MULTICAST(eh->ether_shost) == 0 &&
2422 (eh->ether_shost[0] == 0 &&
2423 eh->ether_shost[1] == 0 &&
2424 eh->ether_shost[2] == 0 &&
2425 eh->ether_shost[3] == 0 &&
2426 eh->ether_shost[4] == 0 &&
2427 eh->ether_shost[5] == 0) == 0) {
2428 bridge_rtupdate(sc, eh->ether_shost, src_if, IFBAF_DYNAMIC);
2432 * Don't forward from an interface in the listening or learning
2433 * state. That is, in the learning state we learn information
2434 * but we throw away the packets.
2436 * We let through packets on interfaces in the blocking state.
2437 * The blocking state is applicable to the send side, not the
2440 if ((bif->bif_flags & IFBIF_STP) != 0 &&
2441 (bif->bif_state == BSTP_IFSTATE_LISTENING ||
2442 bif->bif_state == BSTP_IFSTATE_LEARNING)) {
2448 * At this point, the port either doesn't participate
2449 * in spanning tree or it is in the forwarding state.
2453 * If the packet is unicast, destined for someone on
2454 * "this" side of the bridge, drop it.
2456 * src_if implies the entire bonding set so we have to compare MAC
2457 * addresses and not just if pointers.
2459 if ((m->m_flags & (M_BCAST|M_MCAST)) == 0) {
2460 dst_if = bridge_rtlookup(sc, eh->ether_dhost);
2461 if (dst_if && memcmp(IF_LLADDR(src_if), IF_LLADDR(dst_if),
2462 ETHER_ADDR_LEN) == 0) {
2467 /* ...forward it to all interfaces. */
2468 IFNET_STAT_INC(ifp, imcasts, 1);
2473 * Brodcast if we do not have forwarding information. However, if
2474 * we received the packet on a blocking interface we do not do this
2475 * (unless you really want to blow up your network).
2477 if (dst_if == NULL) {
2481 bridge_broadcast(sc, src_if, m);
2485 dst_if = bridge_select_unicast(sc, dst_if, from_blocking, m);
2487 if (dst_if == NULL) {
2492 if (inet_pfil_hook.ph_hashooks > 0
2494 || inet6_pfil_hook.ph_hashooks > 0
2497 if (bridge_pfil(&m, ifp, src_if, PFIL_IN) != 0)
2502 if (bridge_pfil(&m, ifp, dst_if, PFIL_OUT) != 0)
2507 bridge_handoff(sc, dst_if, m, 0);
2513 * Receive input from a member interface. Queue the packet for
2514 * bridging if it is not for us.
2516 static struct mbuf *
2517 bridge_input(struct ifnet *ifp, struct mbuf *m)
2519 struct bridge_softc *sc = ifp->if_bridge;
2520 struct bridge_iflist *bif;
2521 struct ifnet *bifp, *new_ifp;
2522 struct ether_header *eh;
2523 struct mbuf *mc, *mc2;
2525 ASSERT_IFNET_NOT_SERIALIZED_ALL(ifp);
2529 * Make sure that we are still a member of a bridge interface.
2537 if ((bifp->if_flags & IFF_RUNNING) == 0)
2541 * Implement support for bridge monitoring. If this flag has been
2542 * set on this interface, discard the packet once we push it through
2543 * the bpf(4) machinery, but before we do, increment various counters
2544 * associated with this bridge.
2546 if (bifp->if_flags & IFF_MONITOR) {
2547 /* Change input interface to this bridge */
2548 m->m_pkthdr.rcvif = bifp;
2552 /* Update bridge's ifnet statistics */
2553 IFNET_STAT_INC(bifp, ipackets, 1);
2554 IFNET_STAT_INC(bifp, ibytes, m->m_pkthdr.len);
2555 if (m->m_flags & (M_MCAST | M_BCAST))
2556 IFNET_STAT_INC(bifp, imcasts, 1);
2564 * Handle the ether_header
2566 * In all cases if the packet is destined for us via our MAC
2567 * we must clear BRIDGE_MBUF_TAGGED to ensure that we don't
2568 * repeat the source MAC out the same interface.
2570 * This first test against our bridge MAC is the fast-path.
2572 * NOTE! The bridge interface can serve as an endpoint for
2573 * communication but normally there are no IPs associated
2574 * with it so you cannot route through it. Instead what
2575 * you do is point your default route *THROUGH* the bridge
2576 * to the actual default router for one of the bridged spaces.
2578 * Another possibility is to put all your IP specifications
2579 * on the bridge instead of on the individual interfaces. If
2580 * you do this it should be possible to use the bridge as an
2581 * end point and route (rather than switch) through it using
2582 * the default route or ipfw forwarding rules.
2588 if (m->m_len < ETHER_HDR_LEN) {
2589 m = m_pullup(m, ETHER_HDR_LEN);
2593 eh = mtod(m, struct ether_header *);
2594 m->m_pkthdr.fw_flags |= BRIDGE_MBUF_TAGGED;
2595 bcopy(eh, &m->m_pkthdr.br.ether, sizeof(*eh));
2597 if ((bridge_debug & 1) &&
2598 (ntohs(eh->ether_type) == ETHERTYPE_ARP ||
2599 ntohs(eh->ether_type) == ETHERTYPE_REVARP)) {
2600 kprintf("%02x:%02x:%02x:%02x:%02x:%02x "
2601 "%02x:%02x:%02x:%02x:%02x:%02x type %04x "
2602 "lla %02x:%02x:%02x:%02x:%02x:%02x\n",
2616 ((u_char *)IF_LLADDR(bifp))[0],
2617 ((u_char *)IF_LLADDR(bifp))[1],
2618 ((u_char *)IF_LLADDR(bifp))[2],
2619 ((u_char *)IF_LLADDR(bifp))[3],
2620 ((u_char *)IF_LLADDR(bifp))[4],
2621 ((u_char *)IF_LLADDR(bifp))[5]
2625 if (memcmp(eh->ether_dhost, IF_LLADDR(bifp), ETHER_ADDR_LEN) == 0) {
2627 * If the packet is for us, set the packets source as the
2628 * bridge, and return the packet back to ifnet.if_input for
2631 m->m_pkthdr.fw_flags &= ~BRIDGE_MBUF_TAGGED;
2632 KASSERT(bifp->if_bridge == NULL,
2633 ("loop created in bridge_input"));
2634 if (pfil_member != 0) {
2635 if (inet_pfil_hook.ph_hashooks > 0
2637 || inet6_pfil_hook.ph_hashooks > 0
2640 if (bridge_pfil(&m, NULL, ifp, PFIL_IN) != 0)
2651 * Tap all packets arriving on the bridge, no matter if
2652 * they are local destinations or not. In is in.
2656 bif = bridge_lookup_member_if(sc, ifp);
2663 if (m->m_flags & (M_BCAST | M_MCAST)) {
2665 * Tap off 802.1D packets; they do not get forwarded.
2667 if (memcmp(eh->ether_dhost, bstp_etheraddr,
2668 ETHER_ADDR_LEN) == 0) {
2669 ifnet_serialize_all(bifp);
2670 bstp_input(sc, bif, m);
2671 ifnet_deserialize_all(bifp);
2673 /* m is freed by bstp_input */
2679 * Other than 802.11d packets, ignore packets if the
2680 * interface is not in a good state.
2682 * NOTE: Broadcast/mcast packets received on a blocking or
2683 * learning interface are allowed for local processing.
2685 * The sending side of a blocked port will stop
2686 * transmitting when a better alternative is found.
2687 * However, later on we will disallow the forwarding
2688 * of bcast/mcsat packets over a blocking interface.
2690 if (bif->bif_flags & IFBIF_STP) {
2691 switch (bif->bif_state) {
2692 case BSTP_IFSTATE_L1BLOCKING:
2693 case BSTP_IFSTATE_LISTENING:
2694 case BSTP_IFSTATE_DISABLED:
2697 /* blocking, learning, bonded, forwarding */
2703 * Make a deep copy of the packet and enqueue the copy
2704 * for bridge processing; return the original packet for
2707 mc = m_dup(m, MB_DONTWAIT);
2712 * It's just too dangerous to allow bcast/mcast over a
2713 * blocked interface, eventually the network will sort
2714 * itself out and a better path will be found.
2716 if ((bif->bif_flags & IFBIF_STP) == 0 ||
2717 bif->bif_state != BSTP_IFSTATE_BLOCKING) {
2718 bridge_forward(sc, mc);
2722 * Reinject the mbuf as arriving on the bridge so we have a
2723 * chance at claiming multicast packets. We can not loop back
2724 * here from ether_input as a bridge is never a member of a
2727 KASSERT(bifp->if_bridge == NULL,
2728 ("loop created in bridge_input"));
2729 mc2 = m_dup(m, MB_DONTWAIT);
2732 /* Keep the layer3 header aligned */
2733 int i = min(mc2->m_pkthdr.len, max_protohdr);
2734 mc2 = m_copyup(mc2, i, ETHER_ALIGN);
2739 * Don't tap to bpf(4) again; we have already done
2742 * Leave m_pkthdr.rcvif alone, so ARP replies are
2743 * processed as coming in on the correct interface.
2745 * Clear the bridge flag for local processing in
2746 * case the packet gets routed.
2748 mc2->m_pkthdr.fw_flags &= ~BRIDGE_MBUF_TAGGED;
2749 ether_reinput_oncpu(bifp, mc2, 0);
2752 /* Return the original packet for local processing. */
2757 * Input of a unicast packet. We have to allow unicast packets
2758 * input from links in the BLOCKING state as this might be an
2759 * interface of last resort.
2761 * NOTE: We explicitly ignore normal packets received on a link
2762 * in the BLOCKING state. The point of being in that state
2763 * is to avoid getting duplicate packets.
2765 * HOWEVER, if LINK2 is set the normal spanning tree code
2766 * will mark an interface BLOCKING to avoid multi-cast/broadcast
2767 * loops. Unicast packets CAN still loop if we allow the
2768 * case (hence we only do it in LINK2), but it isn't quite as
2769 * bad as a broadcast packet looping.
2771 if (bif->bif_flags & IFBIF_STP) {
2772 switch (bif->bif_state) {
2773 case BSTP_IFSTATE_L1BLOCKING:
2774 case BSTP_IFSTATE_LISTENING:
2775 case BSTP_IFSTATE_DISABLED:
2778 /* blocking, bonded, forwarding, learning */
2784 * Unicast. Make sure it's not for us.
2786 * This loop is MPSAFE; the only blocking operation (bridge_rtupdate)
2787 * is followed by breaking out of the loop.
2789 TAILQ_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next) {
2790 if (bif->bif_ifp->if_type != IFT_ETHER)
2794 * It is destined for an interface linked to the bridge.
2795 * We want the bridge itself to take care of link level
2796 * forwarding to member interfaces so reinput on the bridge.
2797 * i.e. if you ping an IP on a target interface associated
2798 * with the bridge, the arp is-at response should indicate
2801 * Only update our addr list when learning if the port
2802 * is not in a blocking state. If it is we still allow
2803 * the packet but we do not try to learn from it.
2805 if (memcmp(IF_LLADDR(bif->bif_ifp), eh->ether_dhost,
2806 ETHER_ADDR_LEN) == 0) {
2807 if (bif->bif_ifp != ifp) {
2808 /* XXX loop prevention */
2809 m->m_flags |= M_ETHER_BRIDGED;
2811 if ((bif->bif_flags & IFBIF_LEARNING) &&
2812 bif->bif_state != BSTP_IFSTATE_BLOCKING) {
2813 bridge_rtupdate(sc, eh->ether_shost,
2814 ifp, IFBAF_DYNAMIC);
2816 new_ifp = bifp; /* not bif->bif_ifp */
2817 m->m_pkthdr.fw_flags &= ~BRIDGE_MBUF_TAGGED;
2822 * Ignore received packets that were sent by us.
2824 if (memcmp(IF_LLADDR(bif->bif_ifp), eh->ether_shost,
2825 ETHER_ADDR_LEN) == 0) {
2835 * Perform the bridge forwarding function, but disallow bridging
2836 * to interfaces in the blocking state if the packet came in on
2837 * an interface in the blocking state.
2839 bridge_forward(sc, m);
2843 * ether_reinput_oncpu() will reprocess rcvif as
2844 * coming from new_ifp (since we do not specify
2845 * REINPUT_KEEPRCVIF).
2848 if (new_ifp != NULL) {
2850 * Clear the bridge flag for local processing in
2851 * case the packet gets routed.
2853 ether_reinput_oncpu(new_ifp, m, REINPUT_RUNBPF);
2860 * bridge_start_bcast:
2862 * Broadcast the packet sent from bridge to all member
2864 * This is a simplified version of bridge_broadcast(), however,
2865 * this function expects caller to hold bridge's serializer.
2868 bridge_start_bcast(struct bridge_softc *sc, struct mbuf *m)
2870 struct bridge_iflist *bif;
2872 struct ifnet *dst_if, *alt_if, *bifp;
2879 ASSERT_IFNET_SERIALIZED_ALL(bifp);
2882 * Following loop is MPSAFE; nothing is blocking
2885 * NOTE: We transmit through an member in the BLOCKING state only
2891 TAILQ_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next) {
2892 dst_if = bif->bif_ifp;
2894 if (bif->bif_flags & IFBIF_STP) {
2895 switch (bif->bif_state) {
2896 case BSTP_IFSTATE_BLOCKING:
2897 if (bif->bif_priority > alt_priority) {
2898 alt_priority = bif->bif_priority;
2899 alt_if = bif->bif_ifp;
2902 case BSTP_IFSTATE_L1BLOCKING:
2903 case BSTP_IFSTATE_DISABLED:
2906 /* listening, learning, bonded, forwarding */
2911 if ((bif->bif_flags & IFBIF_DISCOVER) == 0 &&
2912 (m->m_flags & (M_BCAST|M_MCAST)) == 0)
2915 if ((dst_if->if_flags & IFF_RUNNING) == 0)
2918 if (TAILQ_NEXT(bif, bif_next) == NULL) {
2922 mc = m_copypacket(m, MB_DONTWAIT);
2924 IFNET_STAT_INC(bifp, oerrors, 1);
2929 bridge_enqueue(dst_if, mc);
2932 if (found == 0 && alt_if) {
2933 KKASSERT(used == 0);
2936 bridge_enqueue(alt_if, mc);
2946 * Send a frame to all interfaces that are members of
2947 * the bridge, except for the one on which the packet
2951 bridge_broadcast(struct bridge_softc *sc, struct ifnet *src_if,
2954 struct bridge_iflist *bif, *nbif;
2955 struct ether_header *eh;
2957 struct ifnet *dst_if, *alt_if, *bifp;
2965 ASSERT_IFNET_NOT_SERIALIZED_ALL(bifp);
2967 eh = mtod(m, struct ether_header *);
2968 from_us = bridge_from_us(sc, eh);
2970 if (inet_pfil_hook.ph_hashooks > 0
2972 || inet6_pfil_hook.ph_hashooks > 0
2975 if (bridge_pfil(&m, bifp, src_if, PFIL_IN) != 0)
2980 /* Filter on the bridge interface before broadcasting */
2981 if (bridge_pfil(&m, bifp, NULL, PFIL_OUT) != 0)
2992 TAILQ_FOREACH_MUTABLE(bif, &sc->sc_iflists[mycpuid], bif_next, nbif) {
2993 dst_if = bif->bif_ifp;
2995 if ((dst_if->if_flags & IFF_RUNNING) == 0)
2999 * Don't bounce the packet out the same interface it came
3000 * in on. We have to test MAC addresses because a packet
3001 * can come in a bonded interface and we don't want it to
3002 * be echod out the forwarding interface for the same bonding
3005 if (src_if && memcmp(IF_LLADDR(src_if), IF_LLADDR(dst_if),
3006 ETHER_ADDR_LEN) == 0) {
3011 * Generally speaking we only broadcast through forwarding
3012 * interfaces. If no interfaces are available we select
3013 * a BONDED, BLOCKING, or LEARNING interface to forward
3016 if (bif->bif_flags & IFBIF_STP) {
3017 switch (bif->bif_state) {
3018 case BSTP_IFSTATE_BONDED:
3019 if (bif->bif_priority + 512 > alt_priority) {
3020 alt_priority = bif->bif_priority + 512;
3021 alt_if = bif->bif_ifp;
3024 case BSTP_IFSTATE_BLOCKING:
3025 if (bif->bif_priority + 256 > alt_priority) {
3026 alt_priority = bif->bif_priority + 256;
3027 alt_if = bif->bif_ifp;
3030 case BSTP_IFSTATE_LEARNING:
3031 if (bif->bif_priority > alt_priority) {
3032 alt_priority = bif->bif_priority;
3033 alt_if = bif->bif_ifp;
3036 case BSTP_IFSTATE_L1BLOCKING:
3037 case BSTP_IFSTATE_DISABLED:
3038 case BSTP_IFSTATE_LISTENING:
3046 if ((bif->bif_flags & IFBIF_DISCOVER) == 0 &&
3047 (m->m_flags & (M_BCAST|M_MCAST)) == 0) {
3051 if (TAILQ_NEXT(bif, bif_next) == NULL) {
3055 mc = m_copypacket(m, MB_DONTWAIT);
3057 IFNET_STAT_INC(sc->sc_ifp, oerrors, 1);
3064 * Filter on the output interface. Pass a NULL bridge
3065 * interface pointer so we do not redundantly filter on
3066 * the bridge for each interface we broadcast on.
3068 if (inet_pfil_hook.ph_hashooks > 0
3070 || inet6_pfil_hook.ph_hashooks > 0
3073 if (bridge_pfil(&mc, NULL, dst_if, PFIL_OUT) != 0)
3078 bridge_handoff(sc, dst_if, mc, from_us);
3080 if (nbif != NULL && !nbif->bif_onlist) {
3081 KKASSERT(bif->bif_onlist);
3082 nbif = TAILQ_NEXT(bif, bif_next);
3086 if (found == 0 && alt_if) {
3087 KKASSERT(used == 0);
3090 bridge_enqueue(alt_if, mc);
3100 * Duplicate a packet out one or more interfaces that are in span mode,
3101 * the original mbuf is unmodified.
3104 bridge_span(struct bridge_softc *sc, struct mbuf *m)
3106 struct bridge_iflist *bif;
3107 struct ifnet *dst_if, *bifp;
3112 ifnet_serialize_all(bifp);
3114 TAILQ_FOREACH(bif, &sc->sc_spanlist, bif_next) {
3115 dst_if = bif->bif_ifp;
3117 if ((dst_if->if_flags & IFF_RUNNING) == 0)
3120 mc = m_copypacket(m, MB_DONTWAIT);
3122 IFNET_STAT_INC(sc->sc_ifp, oerrors, 1);
3125 bridge_enqueue(dst_if, mc);
3128 ifnet_deserialize_all(bifp);
3132 bridge_rtmsg_sync_handler(netmsg_t msg)
3134 ifnet_forwardmsg(&msg->lmsg, mycpuid + 1);
3138 bridge_rtmsg_sync(struct bridge_softc *sc)
3140 struct netmsg_base msg;
3142 ASSERT_IFNET_NOT_SERIALIZED_ALL(sc->sc_ifp);
3144 netmsg_init(&msg, NULL, &curthread->td_msgport,
3145 0, bridge_rtmsg_sync_handler);
3146 ifnet_domsg(&msg.lmsg, 0);
3149 static __inline void
3150 bridge_rtinfo_update(struct bridge_rtinfo *bri, struct ifnet *dst_if,
3151 int setflags, uint8_t flags, uint32_t timeo)
3153 if ((bri->bri_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC &&
3154 bri->bri_ifp != dst_if)
3155 bri->bri_ifp = dst_if;
3156 if ((flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC &&
3157 bri->bri_expire != time_second + timeo)
3158 bri->bri_expire = time_second + timeo;
3160 bri->bri_flags = flags;
3164 bridge_rtinstall_oncpu(struct bridge_softc *sc, const uint8_t *dst,
3165 struct ifnet *dst_if, int setflags, uint8_t flags,
3166 struct bridge_rtinfo **bri0)
3168 struct bridge_rtnode *brt;
3169 struct bridge_rtinfo *bri;
3172 brt = bridge_rtnode_lookup(sc, dst);
3175 * rtnode for 'dst' already exists. We inform the
3176 * caller about this by leaving bri0 as NULL. The
3177 * caller will terminate the intallation upon getting
3178 * NULL bri0. However, we still need to update the
3181 KKASSERT(*bri0 == NULL);
3184 bridge_rtinfo_update(brt->brt_info, dst_if, setflags,
3185 flags, sc->sc_brttimeout);
3190 * We only need to check brtcnt on CPU0, since if limit
3191 * is to be exceeded, ENOSPC is returned. Caller knows
3192 * this and will terminate the installation.
3194 if (sc->sc_brtcnt >= sc->sc_brtmax)
3197 KKASSERT(*bri0 == NULL);
3198 bri = kmalloc(sizeof(struct bridge_rtinfo), M_DEVBUF,
3203 bri->bri_flags = IFBAF_DYNAMIC;
3204 bridge_rtinfo_update(bri, dst_if, setflags, flags,
3208 KKASSERT(bri != NULL);
3211 brt = kmalloc(sizeof(struct bridge_rtnode), M_DEVBUF,
3213 memcpy(brt->brt_addr, dst, ETHER_ADDR_LEN);
3214 brt->brt_info = bri;
3216 bridge_rtnode_insert(sc, brt);
3221 bridge_rtinstall_handler(netmsg_t msg)
3223 struct netmsg_brsaddr *brmsg = (struct netmsg_brsaddr *)msg;
3226 error = bridge_rtinstall_oncpu(brmsg->br_softc,
3227 brmsg->br_dst, brmsg->br_dst_if,
3228 brmsg->br_setflags, brmsg->br_flags,
3231 KKASSERT(mycpuid == 0 && brmsg->br_rtinfo == NULL);
3232 lwkt_replymsg(&brmsg->base.lmsg, error);
3234 } else if (brmsg->br_rtinfo == NULL) {
3235 /* rtnode already exists for 'dst' */
3236 KKASSERT(mycpuid == 0);
3237 lwkt_replymsg(&brmsg->base.lmsg, 0);
3240 ifnet_forwardmsg(&brmsg->base.lmsg, mycpuid + 1);
3246 * Add/Update a bridge routing entry.
3249 bridge_rtupdate(struct bridge_softc *sc, const uint8_t *dst,
3250 struct ifnet *dst_if, uint8_t flags)
3252 struct bridge_rtnode *brt;
3255 * A route for this destination might already exist. If so,
3256 * update it, otherwise create a new one.
3258 if ((brt = bridge_rtnode_lookup(sc, dst)) == NULL) {
3259 struct netmsg_brsaddr *brmsg;
3261 if (sc->sc_brtcnt >= sc->sc_brtmax)
3264 brmsg = kmalloc(sizeof(*brmsg), M_LWKTMSG, M_WAITOK | M_NULLOK);
3268 netmsg_init(&brmsg->base, NULL, &netisr_afree_rport,
3269 0, bridge_rtinstall_handler);
3270 memcpy(brmsg->br_dst, dst, ETHER_ADDR_LEN);
3271 brmsg->br_dst_if = dst_if;
3272 brmsg->br_flags = flags;
3273 brmsg->br_setflags = 0;
3274 brmsg->br_softc = sc;
3275 brmsg->br_rtinfo = NULL;
3277 ifnet_sendmsg(&brmsg->base.lmsg, 0);
3280 bridge_rtinfo_update(brt->brt_info, dst_if, 0, flags,
3286 bridge_rtsaddr(struct bridge_softc *sc, const uint8_t *dst,
3287 struct ifnet *dst_if, uint8_t flags)
3289 struct netmsg_brsaddr brmsg;
3291 ASSERT_IFNET_NOT_SERIALIZED_ALL(sc->sc_ifp);
3293 netmsg_init(&brmsg.base, NULL, &curthread->td_msgport,
3294 0, bridge_rtinstall_handler);
3295 memcpy(brmsg.br_dst, dst, ETHER_ADDR_LEN);
3296 brmsg.br_dst_if = dst_if;
3297 brmsg.br_flags = flags;
3298 brmsg.br_setflags = 1;
3299 brmsg.br_softc = sc;
3300 brmsg.br_rtinfo = NULL;
3302 return ifnet_domsg(&brmsg.base.lmsg, 0);
3308 * Lookup the destination interface for an address.
3310 static struct ifnet *
3311 bridge_rtlookup(struct bridge_softc *sc, const uint8_t *addr)
3313 struct bridge_rtnode *brt;
3315 if ((brt = bridge_rtnode_lookup(sc, addr)) == NULL)
3317 return brt->brt_info->bri_ifp;
3321 bridge_rtreap_handler(netmsg_t msg)
3323 struct bridge_softc *sc = msg->lmsg.u.ms_resultp;
3324 struct bridge_rtnode *brt, *nbrt;
3326 LIST_FOREACH_MUTABLE(brt, &sc->sc_rtlists[mycpuid], brt_list, nbrt) {
3327 if (brt->brt_info->bri_dead)
3328 bridge_rtnode_destroy(sc, brt);
3330 ifnet_forwardmsg(&msg->lmsg, mycpuid + 1);
3334 bridge_rtreap(struct bridge_softc *sc)
3336 struct netmsg_base msg;
3338 ASSERT_IFNET_NOT_SERIALIZED_ALL(sc->sc_ifp);
3340 netmsg_init(&msg, NULL, &curthread->td_msgport,
3341 0, bridge_rtreap_handler);
3342 msg.lmsg.u.ms_resultp = sc;
3344 ifnet_domsg(&msg.lmsg, 0);
3348 bridge_rtreap_async(struct bridge_softc *sc)
3350 struct netmsg_base *msg;
3352 msg = kmalloc(sizeof(*msg), M_LWKTMSG, M_WAITOK);
3354 netmsg_init(msg, NULL, &netisr_afree_rport,
3355 0, bridge_rtreap_handler);
3356 msg->lmsg.u.ms_resultp = sc;
3358 ifnet_sendmsg(&msg->lmsg, 0);
3364 * Trim the routine table so that we have a number
3365 * of routing entries less than or equal to the
3369 bridge_rttrim(struct bridge_softc *sc)
3371 struct bridge_rtnode *brt;
3374 ASSERT_IFNET_NOT_SERIALIZED_ALL(sc->sc_ifp);
3376 /* Make sure we actually need to do this. */
3377 if (sc->sc_brtcnt <= sc->sc_brtmax)
3381 * Find out how many rtnodes are dead
3383 dead = bridge_rtage_finddead(sc);
3384 KKASSERT(dead <= sc->sc_brtcnt);
3386 if (sc->sc_brtcnt - dead <= sc->sc_brtmax) {
3387 /* Enough dead rtnodes are found */
3393 * Kill some dynamic rtnodes to meet the brtmax
3395 LIST_FOREACH(brt, &sc->sc_rtlists[mycpuid], brt_list) {
3396 struct bridge_rtinfo *bri = brt->brt_info;
3398 if (bri->bri_dead) {
3400 * We have counted this rtnode in
3401 * bridge_rtage_finddead()
3406 if ((bri->bri_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC) {
3409 KKASSERT(dead <= sc->sc_brtcnt);
3411 if (sc->sc_brtcnt - dead <= sc->sc_brtmax) {
3412 /* Enough rtnodes are collected */
3424 * Aging timer for the bridge.
3427 bridge_timer(void *arg)
3429 struct bridge_softc *sc = arg;
3430 struct netmsg_base *msg;
3432 KKASSERT(mycpuid == BRIDGE_CFGCPU);
3436 if (callout_pending(&sc->sc_brcallout) ||
3437 !callout_active(&sc->sc_brcallout)) {
3441 callout_deactivate(&sc->sc_brcallout);
3443 msg = &sc->sc_brtimemsg;
3444 KKASSERT(msg->lmsg.ms_flags & MSGF_DONE);
3445 lwkt_sendmsg(BRIDGE_CFGPORT, &msg->lmsg);
3451 bridge_timer_handler(netmsg_t msg)
3453 struct bridge_softc *sc = msg->lmsg.u.ms_resultp;
3455 KKASSERT(&curthread->td_msgport == BRIDGE_CFGPORT);
3459 lwkt_replymsg(&msg->lmsg, 0);
3463 if (sc->sc_ifp->if_flags & IFF_RUNNING) {
3464 callout_reset(&sc->sc_brcallout,
3465 bridge_rtable_prune_period * hz, bridge_timer, sc);
3470 bridge_rtage_finddead(struct bridge_softc *sc)
3472 struct bridge_rtnode *brt;
3475 LIST_FOREACH(brt, &sc->sc_rtlists[mycpuid], brt_list) {
3476 struct bridge_rtinfo *bri = brt->brt_info;
3478 if ((bri->bri_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC &&
3479 time_second >= bri->bri_expire) {
3482 KKASSERT(dead <= sc->sc_brtcnt);
3491 * Perform an aging cycle.
3494 bridge_rtage(struct bridge_softc *sc)
3496 ASSERT_IFNET_NOT_SERIALIZED_ALL(sc->sc_ifp);
3498 if (bridge_rtage_finddead(sc))
3505 * Remove all dynamic addresses from the bridge.
3508 bridge_rtflush(struct bridge_softc *sc, int bf)
3510 struct bridge_rtnode *brt;
3514 LIST_FOREACH(brt, &sc->sc_rtlists[mycpuid], brt_list) {
3515 struct bridge_rtinfo *bri = brt->brt_info;
3517 if ((bf & IFBF_FLUSHALL) ||
3518 (bri->bri_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC) {
3524 if (bf & IFBF_FLUSHSYNC)
3527 bridge_rtreap_async(sc);
3534 * Remove an address from the table.
3537 bridge_rtdaddr(struct bridge_softc *sc, const uint8_t *addr)
3539 struct bridge_rtnode *brt;
3541 ASSERT_IFNET_NOT_SERIALIZED_ALL(sc->sc_ifp);
3543 if ((brt = bridge_rtnode_lookup(sc, addr)) == NULL)
3546 /* TODO: add a cheaper delete operation */
3547 brt->brt_info->bri_dead = 1;
3555 * Delete routes to a speicifc member interface.
3558 bridge_rtdelete(struct bridge_softc *sc, struct ifnet *ifp, int bf)
3560 struct bridge_rtnode *brt;
3564 LIST_FOREACH(brt, &sc->sc_rtlists[mycpuid], brt_list) {
3565 struct bridge_rtinfo *bri = brt->brt_info;
3567 if (bri->bri_ifp == ifp &&
3568 ((bf & IFBF_FLUSHALL) ||
3569 (bri->bri_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC)) {
3575 if (bf & IFBF_FLUSHSYNC)
3578 bridge_rtreap_async(sc);
3583 * bridge_rtable_init:
3585 * Initialize the route table for this bridge.
3588 bridge_rtable_init(struct bridge_softc *sc)
3593 * Initialize per-cpu hash tables
3595 sc->sc_rthashs = kmalloc(sizeof(*sc->sc_rthashs) * ncpus,
3596 M_DEVBUF, M_WAITOK);
3597 for (cpu = 0; cpu < ncpus; ++cpu) {
3600 sc->sc_rthashs[cpu] =
3601 kmalloc(sizeof(struct bridge_rtnode_head) * BRIDGE_RTHASH_SIZE,
3602 M_DEVBUF, M_WAITOK);
3604 for (i = 0; i < BRIDGE_RTHASH_SIZE; i++)
3605 LIST_INIT(&sc->sc_rthashs[cpu][i]);
3607 sc->sc_rthash_key = karc4random();
3610 * Initialize per-cpu lists
3612 sc->sc_rtlists = kmalloc(sizeof(struct bridge_rtnode_head) * ncpus,
3613 M_DEVBUF, M_WAITOK);
3614 for (cpu = 0; cpu < ncpus; ++cpu)
3615 LIST_INIT(&sc->sc_rtlists[cpu]);
3619 * bridge_rtable_fini:
3621 * Deconstruct the route table for this bridge.
3624 bridge_rtable_fini(struct bridge_softc *sc)
3629 * Free per-cpu hash tables
3631 for (cpu = 0; cpu < ncpus; ++cpu)
3632 kfree(sc->sc_rthashs[cpu], M_DEVBUF);
3633 kfree(sc->sc_rthashs, M_DEVBUF);
3636 * Free per-cpu lists
3638 kfree(sc->sc_rtlists, M_DEVBUF);
3642 * The following hash function is adapted from "Hash Functions" by Bob Jenkins
3643 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997).
3645 #define mix(a, b, c) \
3647 a -= b; a -= c; a ^= (c >> 13); \
3648 b -= c; b -= a; b ^= (a << 8); \
3649 c -= a; c -= b; c ^= (b >> 13); \
3650 a -= b; a -= c; a ^= (c >> 12); \
3651 b -= c; b -= a; b ^= (a << 16); \
3652 c -= a; c -= b; c ^= (b >> 5); \
3653 a -= b; a -= c; a ^= (c >> 3); \
3654 b -= c; b -= a; b ^= (a << 10); \
3655 c -= a; c -= b; c ^= (b >> 15); \
3656 } while (/*CONSTCOND*/0)
3658 static __inline uint32_t
3659 bridge_rthash(struct bridge_softc *sc, const uint8_t *addr)
3661 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = sc->sc_rthash_key;
3672 return (c & BRIDGE_RTHASH_MASK);
3678 bridge_rtnode_addr_cmp(const uint8_t *a, const uint8_t *b)
3682 for (i = 0, d = 0; i < ETHER_ADDR_LEN && d == 0; i++) {
3683 d = ((int)a[i]) - ((int)b[i]);
3690 * bridge_rtnode_lookup:
3692 * Look up a bridge route node for the specified destination.
3694 static struct bridge_rtnode *
3695 bridge_rtnode_lookup(struct bridge_softc *sc, const uint8_t *addr)
3697 struct bridge_rtnode *brt;
3701 hash = bridge_rthash(sc, addr);
3702 LIST_FOREACH(brt, &sc->sc_rthashs[mycpuid][hash], brt_hash) {
3703 dir = bridge_rtnode_addr_cmp(addr, brt->brt_addr);
3714 * bridge_rtnode_insert:
3716 * Insert the specified bridge node into the route table.
3717 * Caller has to make sure that rtnode does not exist.
3720 bridge_rtnode_insert(struct bridge_softc *sc, struct bridge_rtnode *brt)
3722 struct bridge_rtnode *lbrt;
3726 hash = bridge_rthash(sc, brt->brt_addr);
3728 lbrt = LIST_FIRST(&sc->sc_rthashs[mycpuid][hash]);
3730 LIST_INSERT_HEAD(&sc->sc_rthashs[mycpuid][hash],
3736 dir = bridge_rtnode_addr_cmp(brt->brt_addr, lbrt->brt_addr);
3737 KASSERT(dir != 0, ("rtnode already exist"));
3740 LIST_INSERT_BEFORE(lbrt, brt, brt_hash);
3743 if (LIST_NEXT(lbrt, brt_hash) == NULL) {
3744 LIST_INSERT_AFTER(lbrt, brt, brt_hash);
3747 lbrt = LIST_NEXT(lbrt, brt_hash);
3748 } while (lbrt != NULL);
3750 panic("no suitable position found for rtnode");
3752 LIST_INSERT_HEAD(&sc->sc_rtlists[mycpuid], brt, brt_list);
3755 * Update the brtcnt.
3756 * We only need to do it once and we do it on CPU0.
3763 * bridge_rtnode_destroy:
3765 * Destroy a bridge rtnode.
3768 bridge_rtnode_destroy(struct bridge_softc *sc, struct bridge_rtnode *brt)
3770 LIST_REMOVE(brt, brt_hash);
3771 LIST_REMOVE(brt, brt_list);
3773 if (mycpuid + 1 == ncpus) {
3774 /* Free rtinfo associated with rtnode on the last cpu */
3775 kfree(brt->brt_info, M_DEVBUF);
3777 kfree(brt, M_DEVBUF);
3780 /* Update brtcnt only on CPU0 */
3786 bridge_post_pfil(struct mbuf *m)
3788 if (m->m_pkthdr.fw_flags & IPFORWARD_MBUF_TAGGED)
3792 if (m->m_pkthdr.fw_flags & DUMMYNET_MBUF_TAGGED)
3799 * Send bridge packets through pfil if they are one of the types pfil can deal
3800 * with, or if they are ARP or REVARP. (pfil will pass ARP and REVARP without
3801 * question.) If *bifp or *ifp are NULL then packet filtering is skipped for
3805 bridge_pfil(struct mbuf **mp, struct ifnet *bifp, struct ifnet *ifp, int dir)
3807 int snap, error, i, hlen;
3808 struct ether_header *eh1, eh2;
3811 u_int16_t ether_type;
3814 error = -1; /* Default error if not error == 0 */
3816 if (pfil_bridge == 0 && pfil_member == 0)
3817 return (0); /* filtering is disabled */
3819 i = min((*mp)->m_pkthdr.len, max_protohdr);
3820 if ((*mp)->m_len < i) {
3821 *mp = m_pullup(*mp, i);
3823 kprintf("%s: m_pullup failed\n", __func__);
3828 eh1 = mtod(*mp, struct ether_header *);
3829 ether_type = ntohs(eh1->ether_type);
3832 * Check for SNAP/LLC.
3834 if (ether_type < ETHERMTU) {
3835 struct llc *llc2 = (struct llc *)(eh1 + 1);
3837 if ((*mp)->m_len >= ETHER_HDR_LEN + 8 &&
3838 llc2->llc_dsap == LLC_SNAP_LSAP &&
3839 llc2->llc_ssap == LLC_SNAP_LSAP &&
3840 llc2->llc_control == LLC_UI) {
3841 ether_type = htons(llc2->llc_un.type_snap.ether_type);
3847 * If we're trying to filter bridge traffic, don't look at anything
3848 * other than IP and ARP traffic. If the filter doesn't understand
3849 * IPv6, don't allow IPv6 through the bridge either. This is lame
3850 * since if we really wanted, say, an AppleTalk filter, we are hosed,
3851 * but of course we don't have an AppleTalk filter to begin with.
3852 * (Note that since pfil doesn't understand ARP it will pass *ALL*
3855 switch (ether_type) {
3857 case ETHERTYPE_REVARP:
3858 return (0); /* Automatically pass */
3862 case ETHERTYPE_IPV6:
3868 * Check to see if the user wants to pass non-ip
3869 * packets, these will not be checked by pfil(9)
3870 * and passed unconditionally so the default is to drop.
3876 /* Strip off the Ethernet header and keep a copy. */
3877 m_copydata(*mp, 0, ETHER_HDR_LEN, (caddr_t) &eh2);
3878 m_adj(*mp, ETHER_HDR_LEN);
3880 /* Strip off snap header, if present */
3882 m_copydata(*mp, 0, sizeof(struct llc), (caddr_t) &llc1);
3883 m_adj(*mp, sizeof(struct llc));
3887 * Check the IP header for alignment and errors
3889 if (dir == PFIL_IN) {
3890 switch (ether_type) {
3892 error = bridge_ip_checkbasic(mp);
3895 case ETHERTYPE_IPV6:
3896 error = bridge_ip6_checkbasic(mp);
3909 * Run the packet through pfil
3911 switch (ether_type) {
3914 * before calling the firewall, swap fields the same as
3915 * IP does. here we assume the header is contiguous
3917 ip = mtod(*mp, struct ip *);
3919 ip->ip_len = ntohs(ip->ip_len);
3920 ip->ip_off = ntohs(ip->ip_off);
3923 * Run pfil on the member interface and the bridge, both can
3924 * be skipped by clearing pfil_member or pfil_bridge.
3927 * in_if -> bridge_if -> out_if
3929 if (pfil_bridge && dir == PFIL_OUT && bifp != NULL) {
3930 error = pfil_run_hooks(&inet_pfil_hook, mp, bifp, dir);
3931 if (*mp == NULL || error != 0) /* filter may consume */
3933 error = bridge_post_pfil(*mp);
3938 if (pfil_member && ifp != NULL) {
3939 error = pfil_run_hooks(&inet_pfil_hook, mp, ifp, dir);
3940 if (*mp == NULL || error != 0) /* filter may consume */
3942 error = bridge_post_pfil(*mp);
3947 if (pfil_bridge && dir == PFIL_IN && bifp != NULL) {
3948 error = pfil_run_hooks(&inet_pfil_hook, mp, bifp, dir);
3949 if (*mp == NULL || error != 0) /* filter may consume */
3951 error = bridge_post_pfil(*mp);
3956 /* check if we need to fragment the packet */
3957 if (pfil_member && ifp != NULL && dir == PFIL_OUT) {
3958 i = (*mp)->m_pkthdr.len;
3959 if (i > ifp->if_mtu) {
3960 error = bridge_fragment(ifp, *mp, &eh2, snap,
3966 /* Recalculate the ip checksum and restore byte ordering */
3967 ip = mtod(*mp, struct ip *);
3968 hlen = ip->ip_hl << 2;
3969 if (hlen < sizeof(struct ip))
3971 if (hlen > (*mp)->m_len) {
3972 if ((*mp = m_pullup(*mp, hlen)) == NULL)
3974 ip = mtod(*mp, struct ip *);
3978 ip->ip_len = htons(ip->ip_len);
3979 ip->ip_off = htons(ip->ip_off);
3981 if (hlen == sizeof(struct ip))
3982 ip->ip_sum = in_cksum_hdr(ip);
3984 ip->ip_sum = in_cksum(*mp, hlen);
3988 case ETHERTYPE_IPV6:
3989 if (pfil_bridge && dir == PFIL_OUT && bifp != NULL)
3990 error = pfil_run_hooks(&inet6_pfil_hook, mp, bifp,
3993 if (*mp == NULL || error != 0) /* filter may consume */
3996 if (pfil_member && ifp != NULL)
3997 error = pfil_run_hooks(&inet6_pfil_hook, mp, ifp,
4000 if (*mp == NULL || error != 0) /* filter may consume */
4003 if (pfil_bridge && dir == PFIL_IN && bifp != NULL)
4004 error = pfil_run_hooks(&inet6_pfil_hook, mp, bifp,
4021 * Finally, put everything back the way it was and return
4024 M_PREPEND(*mp, sizeof(struct llc), MB_DONTWAIT);
4027 bcopy(&llc1, mtod(*mp, caddr_t), sizeof(struct llc));
4030 M_PREPEND(*mp, ETHER_HDR_LEN, MB_DONTWAIT);
4033 bcopy(&eh2, mtod(*mp, caddr_t), ETHER_HDR_LEN);
4044 * Perform basic checks on header size since
4045 * pfil assumes ip_input has already processed
4046 * it for it. Cut-and-pasted from ip_input.c.
4047 * Given how simple the IPv6 version is,
4048 * does the IPv4 version really need to be
4051 * XXX Should we update ipstat here, or not?
4052 * XXX Right now we update ipstat but not
4056 bridge_ip_checkbasic(struct mbuf **mp)
4058 struct mbuf *m = *mp;
4066 if (IP_HDR_ALIGNED_P(mtod(m, caddr_t)) == 0) {
4067 if ((m = m_copyup(m, sizeof(struct ip),
4068 (max_linkhdr + 3) & ~3)) == NULL) {
4069 /* XXXJRT new stat, please */
4070 ipstat.ips_toosmall++;
4075 #ifndef __predict_false
4076 #define __predict_false(x) x
4078 if (__predict_false(m->m_len < sizeof (struct ip))) {
4079 if ((m = m_pullup(m, sizeof (struct ip))) == NULL) {
4080 ipstat.ips_toosmall++;
4084 ip = mtod(m, struct ip *);
4085 if (ip == NULL) goto bad;
4087 if (ip->ip_v != IPVERSION) {
4088 ipstat.ips_badvers++;
4091 hlen = ip->ip_hl << 2;
4092 if (hlen < sizeof(struct ip)) { /* minimum header length */
4093 ipstat.ips_badhlen++;
4096 if (hlen > m->m_len) {
4097 if ((m = m_pullup(m, hlen)) == NULL) {
4098 ipstat.ips_badhlen++;
4101 ip = mtod(m, struct ip *);
4102 if (ip == NULL) goto bad;
4105 if (m->m_pkthdr.csum_flags & CSUM_IP_CHECKED) {
4106 sum = !(m->m_pkthdr.csum_flags & CSUM_IP_VALID);
4108 if (hlen == sizeof(struct ip)) {
4109 sum = in_cksum_hdr(ip);
4111 sum = in_cksum(m, hlen);
4115 ipstat.ips_badsum++;
4119 /* Retrieve the packet length. */
4120 len = ntohs(ip->ip_len);
4123 * Check for additional length bogosity
4126 ipstat.ips_badlen++;
4131 * Check that the amount of data in the buffers
4132 * is as at least much as the IP header would have us expect.
4133 * Drop packet if shorter than we expect.
4135 if (m->m_pkthdr.len < len) {
4136 ipstat.ips_tooshort++;
4140 /* Checks out, proceed */
4151 * Same as above, but for IPv6.
4152 * Cut-and-pasted from ip6_input.c.
4153 * XXX Should we update ip6stat, or not?
4156 bridge_ip6_checkbasic(struct mbuf **mp)
4158 struct mbuf *m = *mp;
4159 struct ip6_hdr *ip6;
4162 * If the IPv6 header is not aligned, slurp it up into a new
4163 * mbuf with space for link headers, in the event we forward
4164 * it. Otherwise, if it is aligned, make sure the entire base
4165 * IPv6 header is in the first mbuf of the chain.
4168 if (IP6_HDR_ALIGNED_P(mtod(m, caddr_t)) == 0) {
4169 struct ifnet *inifp = m->m_pkthdr.rcvif;
4170 if ((m = m_copyup(m, sizeof(struct ip6_hdr),
4171 (max_linkhdr + 3) & ~3)) == NULL) {
4172 /* XXXJRT new stat, please */
4173 ip6stat.ip6s_toosmall++;
4174 in6_ifstat_inc(inifp, ifs6_in_hdrerr);
4179 if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
4180 struct ifnet *inifp = m->m_pkthdr.rcvif;
4181 if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
4182 ip6stat.ip6s_toosmall++;
4183 in6_ifstat_inc(inifp, ifs6_in_hdrerr);
4188 ip6 = mtod(m, struct ip6_hdr *);
4190 if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
4191 ip6stat.ip6s_badvers++;
4192 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
4196 /* Checks out, proceed */
4209 * Return a fragmented mbuf chain.
4212 bridge_fragment(struct ifnet *ifp, struct mbuf *m, struct ether_header *eh,
4213 int snap, struct llc *llc)
4219 if (m->m_len < sizeof(struct ip) &&
4220 (m = m_pullup(m, sizeof(struct ip))) == NULL)
4222 ip = mtod(m, struct ip *);
4224 error = ip_fragment(ip, &m, ifp->if_mtu, ifp->if_hwassist,
4229 /* walk the chain and re-add the Ethernet header */
4230 for (m0 = m; m0; m0 = m0->m_nextpkt) {
4233 M_PREPEND(m0, sizeof(struct llc), MB_DONTWAIT);
4238 bcopy(llc, mtod(m0, caddr_t),
4239 sizeof(struct llc));
4241 M_PREPEND(m0, ETHER_HDR_LEN, MB_DONTWAIT);
4246 bcopy(eh, mtod(m0, caddr_t), ETHER_HDR_LEN);
4252 ipstat.ips_fragmented++;
4263 bridge_enqueue_handler(netmsg_t msg)
4265 struct netmsg_packet *nmp;
4266 struct ifnet *dst_ifp;
4271 dst_ifp = nmp->base.lmsg.u.ms_resultp;
4274 bridge_handoff(dst_ifp->if_bridge, dst_ifp, m, 1);
4278 bridge_handoff(struct bridge_softc *sc, struct ifnet *dst_ifp,
4279 struct mbuf *m, int from_us)
4287 /* We may be sending a fragment so traverse the mbuf */
4289 struct altq_pktattr pktattr;
4292 m->m_nextpkt = NULL;
4295 * If being sent from our host override ether_shost
4296 * with the bridge MAC. This is mandatory for ARP
4297 * so things don't get confused. In particular we
4298 * don't want ARPs to get associated with link interfaces
4299 * under the bridge which might or might not stay valid.
4301 * Also override ether_shost when relaying a packet out
4302 * the same interface it came in on, due to multi-homed
4303 * addresses & default routes, otherwise switches will
4304 * get very confused.
4306 * Otherwise if we are in transparent mode.
4308 if (from_us || m->m_pkthdr.rcvif == dst_ifp) {
4310 offsetof(struct ether_header, ether_shost),
4311 ETHER_ADDR_LEN, IF_LLADDR(sc->sc_ifp));
4312 } else if ((bifp->if_flags & IFF_LINK0) &&
4313 (m->m_pkthdr.fw_flags & BRIDGE_MBUF_TAGGED)) {
4315 offsetof(struct ether_header, ether_shost),
4317 m->m_pkthdr.br.ether.ether_shost);
4318 } /* else retain shost */
4320 if (ifq_is_enabled(&dst_ifp->if_snd))
4321 altq_etherclassify(&dst_ifp->if_snd, m, &pktattr);
4323 ifq_dispatch(dst_ifp, m, &pktattr);
4328 bridge_control_dispatch(netmsg_t msg)
4330 struct netmsg_brctl *bc_msg = (struct netmsg_brctl *)msg;
4331 struct ifnet *bifp = bc_msg->bc_sc->sc_ifp;
4334 ifnet_serialize_all(bifp);
4335 error = bc_msg->bc_func(bc_msg->bc_sc, bc_msg->bc_arg);
4336 ifnet_deserialize_all(bifp);
4338 lwkt_replymsg(&bc_msg->base.lmsg, error);
4342 bridge_control(struct bridge_softc *sc, u_long cmd,
4343 bridge_ctl_t bc_func, void *bc_arg)
4345 struct ifnet *bifp = sc->sc_ifp;
4346 struct netmsg_brctl bc_msg;
4349 ASSERT_IFNET_SERIALIZED_ALL(bifp);
4351 bzero(&bc_msg, sizeof(bc_msg));
4353 netmsg_init(&bc_msg.base, NULL, &curthread->td_msgport,
4354 0, bridge_control_dispatch);
4355 bc_msg.bc_func = bc_func;
4357 bc_msg.bc_arg = bc_arg;
4359 ifnet_deserialize_all(bifp);
4360 error = lwkt_domsg(BRIDGE_CFGPORT, &bc_msg.base.lmsg, 0);
4361 ifnet_serialize_all(bifp);
4366 bridge_add_bif_handler(netmsg_t msg)
4368 struct netmsg_braddbif *amsg = (struct netmsg_braddbif *)msg;
4369 struct bridge_softc *sc;
4370 struct bridge_iflist *bif;
4372 sc = amsg->br_softc;
4374 bif = kmalloc(sizeof(*bif), M_DEVBUF, M_WAITOK | M_ZERO);
4375 bif->bif_ifp = amsg->br_bif_ifp;
4376 bif->bif_onlist = 1;
4377 bif->bif_info = amsg->br_bif_info;
4380 * runs through bif_info
4382 bif->bif_flags = IFBIF_LEARNING | IFBIF_DISCOVER;
4384 TAILQ_INSERT_HEAD(&sc->sc_iflists[mycpuid], bif, bif_next);
4386 ifnet_forwardmsg(&amsg->base.lmsg, mycpuid + 1);
4390 bridge_add_bif(struct bridge_softc *sc, struct bridge_ifinfo *bif_info,
4393 struct netmsg_braddbif amsg;
4395 ASSERT_IFNET_NOT_SERIALIZED_ALL(sc->sc_ifp);
4397 netmsg_init(&amsg.base, NULL, &curthread->td_msgport,
4398 0, bridge_add_bif_handler);
4400 amsg.br_bif_info = bif_info;
4401 amsg.br_bif_ifp = ifp;
4403 ifnet_domsg(&amsg.base.lmsg, 0);
4407 bridge_del_bif_handler(netmsg_t msg)
4409 struct netmsg_brdelbif *dmsg = (struct netmsg_brdelbif *)msg;
4410 struct bridge_softc *sc;
4411 struct bridge_iflist *bif;
4413 sc = dmsg->br_softc;
4416 * Locate the bif associated with the br_bif_info
4417 * on the current CPU
4419 bif = bridge_lookup_member_ifinfo(sc, dmsg->br_bif_info);
4420 KKASSERT(bif != NULL && bif->bif_onlist);
4422 /* Remove the bif from the current CPU's iflist */
4423 bif->bif_onlist = 0;
4424 TAILQ_REMOVE(dmsg->br_bif_list, bif, bif_next);
4426 /* Save the removed bif for later freeing */
4427 TAILQ_INSERT_HEAD(dmsg->br_bif_list, bif, bif_next);
4429 ifnet_forwardmsg(&dmsg->base.lmsg, mycpuid + 1);
4433 bridge_del_bif(struct bridge_softc *sc, struct bridge_ifinfo *bif_info,
4434 struct bridge_iflist_head *saved_bifs)
4436 struct netmsg_brdelbif dmsg;
4438 ASSERT_IFNET_NOT_SERIALIZED_ALL(sc->sc_ifp);
4440 netmsg_init(&dmsg.base, NULL, &curthread->td_msgport,
4441 0, bridge_del_bif_handler);
4443 dmsg.br_bif_info = bif_info;
4444 dmsg.br_bif_list = saved_bifs;
4446 ifnet_domsg(&dmsg.base.lmsg, 0);