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kernel - Major bridging functionality completed
[dragonfly.git] / sys / net / bridge / if_bridge.c
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ac93838f
SS		 1/*
2 * Copyright 2001 Wasabi Systems, Inc.
3 * All rights reserved.
4 *
5 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
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
21 * written permission.
22 *
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.
34 */
35
36/*
37 * Copyright (c) 1999, 2000 Jason L. Wright (jason@thought.net)
38 * All rights reserved.
39 *
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
42 * are met:
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.
53 *
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.
65 *
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 $
ac93838f
SS		 69 */
70
71/*
72 * Network interface bridge support.
73 *
74 * TODO:
75 *
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).
4394693c
SZ		 80 *
81 *
82 * Bridge's route information is duplicated to each CPUs:
83 *
84 * CPU0 CPU1 CPU2 CPU3
85 * +-----------+ +-----------+ +-----------+ +-----------+
86 * | rtnode | | rtnode | | rtnode | | rtnode |
87 * | | | | | | | |
88 * | dst eaddr | | dst eaddr | | dst eaddr | | dst eaddr |
89 * +-----------+ +-----------+ +-----------+ +-----------+
90 * | | | |
91 * | | | |
92 * | | +----------+ | |
93 * | | | rtinfo | | |
94 * | +---->| |<---+ |
95 * | | flags | |
96 * +-------------->| timeout |<-------------+
97 * | dst_ifp |
98 * +----------+
99 *
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.
108 *
109 *
110 * Bridge route information installation on bridge_input path:
111 *
112 * CPU0 CPU1 CPU2 CPU3
113 *
114 * tcp_thread2
115 * |
116 * alloc nmsg
117 * snd nmsg |
118 * w/o rtinfo |
119 * ifnet0<-----------------------+
120 * | :
121 * lookup dst :
122 * rtnode exists?(Y)free nmsg :
123 * |(N) :
124 * |
125 * alloc rtinfo
126 * alloc rtnode
127 * install rtnode
128 * |
129 * +---------->ifnet1
130 * : fwd nmsg |
131 * : w/ rtinfo |
132 * : |
133 * : |
134 * alloc rtnode
135 * (w/ nmsg's rtinfo)
136 * install rtnode
137 * |
138 * +---------->ifnet2
139 * : fwd nmsg |
140 * : w/ rtinfo |
141 * : |
142 * : same as ifnet1
143 * |
144 * +---------->ifnet3
145 * : fwd nmsg |
146 * : w/ rtinfo |
147 * : |
148 * : same as ifnet1
149 * free nmsg
150 * :
151 * :
152 *
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.
160 *
161 *
162 * Bridge route information deleting/flushing:
163 *
164 * CPU0 CPU1 CPU2 CPU3
165 *
166 * netisr0
167 * |
168 * find suitable rtnodes,
169 * mark their rtinfo dead
170 * |
171 * | domsg <------------------------------------------+
172 * | | replymsg
173 * | |
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
178 * free dead rtinfos
179 *
180 * All deleting/flushing operations are serialized by netisr0, so each
181 * operation only reaps the route information marked dead by itself.
182 *
183 *
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
187 * information.
80ed9a26
SZ		 188 *
189 *
190 *
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:
197 *
70d9a675 198 * TAILQ_FOREACH_MUTABLE(bif, sc->sc_iflists[mycpuid], bif_next, nbif) {
80ed9a26
SZ		 199 * blocking operation;
200 * blocking operation;
201 * ...
202 * ...
203 * if (nbif != NULL && !nbif->bif_onlist) {
204 * KKASSERT(bif->bif_onlist);
70d9a675 205 * nbif = TAILQ_NEXT(bif, bif_next);
80ed9a26
SZ		 206 * }
207 * }
208 *
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.
ac93838f
SS		 216 */
217
ac93838f
SS		 218#include "opt_inet.h"
219#include "opt_inet6.h"
220
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>
895c1f85 235#include <sys/priv.h>
ac93838f
SS		 236#include <sys/lock.h>
237#include <sys/thread.h>
238#include <sys/thread2.h>
239#include <sys/mpipe.h>
240
241#include <net/bpf.h>
242#include <net/if.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>
65a24520 248#include <net/if_clone.h>
ac93838f
SS		 249
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>
255#ifdef INET6
256#include <netinet/ip6.h>
257#include <netinet6/ip6_var.h>
258#endif
259#include <netinet/if_ether.h> /* for struct arpcom */
260#include <net/bridge/if_bridgevar.h>
261#include <net/if_llc.h>
ecd27a4c 262#include <net/netmsg2.h>
ac93838f
SS		 263
264#include <net/route.h>
265#include <sys/in_cksum.h>
266
267/*
268 * Size of the route hash table. Must be a power of two.
269 */
270#ifndef BRIDGE_RTHASH_SIZE
271#define BRIDGE_RTHASH_SIZE 1024
272#endif
273
274#define BRIDGE_RTHASH_MASK (BRIDGE_RTHASH_SIZE - 1)
275
276/*
277 * Maximum number of addresses to cache.
278 */
279#ifndef BRIDGE_RTABLE_MAX
280#define BRIDGE_RTABLE_MAX 100
281#endif
282
283/*
284 * Spanning tree defaults.
285 */
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
293
294/*
295 * Timeout (in seconds) for entries learned dynamically.
296 */
297#ifndef BRIDGE_RTABLE_TIMEOUT
298#define BRIDGE_RTABLE_TIMEOUT (20 * 60) /* same as ARP */
299#endif
300
301/*
302 * Number of seconds between walks of the route list.
303 */
304#ifndef BRIDGE_RTABLE_PRUNE_PERIOD
305#define BRIDGE_RTABLE_PRUNE_PERIOD (5 * 60)
306#endif
307
d217f5e5
SU		 308/*
309 * List of capabilities to mask on the member interface.
310 */
311#define BRIDGE_IFCAPS_MASK IFCAP_TXCSUM
312
4394693c
SZ		 313typedef int (*bridge_ctl_t)(struct bridge_softc *, void *);
314
315struct netmsg_brctl {
002c1265 316 struct netmsg_base base;
4394693c
SZ		 317 bridge_ctl_t bc_func;
318 struct bridge_softc *bc_sc;
319 void *bc_arg;
320};
321
322struct netmsg_brsaddr {
002c1265 323 struct netmsg_base base;
4394693c
SZ		 324 struct bridge_softc *br_softc;
325 struct ifnet *br_dst_if;
326 struct bridge_rtinfo *br_rtinfo;
327 int br_setflags;
328 uint8_t br_dst[ETHER_ADDR_LEN];
329 uint8_t br_flags;
330};
331
8f7b13ef 332struct netmsg_braddbif {
002c1265 333 struct netmsg_base base;
8f7b13ef
SZ		 334 struct bridge_softc *br_softc;
335 struct bridge_ifinfo *br_bif_info;
336 struct ifnet *br_bif_ifp;
337};
338
339struct netmsg_brdelbif {
002c1265 340 struct netmsg_base base;
8f7b13ef
SZ		 341 struct bridge_softc *br_softc;
342 struct bridge_ifinfo *br_bif_info;
343 struct bridge_iflist_head *br_bif_list;
344};
345
346struct netmsg_brsflags {
002c1265 347 struct netmsg_base base;
8f7b13ef
SZ		 348 struct bridge_softc *br_softc;
349 struct bridge_ifinfo *br_bif_info;
350 uint32_t br_bif_flags;
351};
352
d217f5e5
SU		 353eventhandler_tag bridge_detach_cookie = NULL;
354
ac93838f 355extern struct mbuf *(*bridge_input_p)(struct ifnet *, struct mbuf *);
eb366364 356extern int (*bridge_output_p)(struct ifnet *, struct mbuf *);
ac93838f 357extern void (*bridge_dn_p)(struct mbuf *, struct ifnet *);
70d9a675 358extern struct ifnet *(*bridge_interface_p)(void *if_bridge);
ac93838f 359
d217f5e5 360static int bridge_rtable_prune_period = BRIDGE_RTABLE_PRUNE_PERIOD;
ac93838f 361
d14ef41e 362static int bridge_clone_create(struct if_clone *, int, caddr_t);
a7e9152e 363static int bridge_clone_destroy(struct ifnet *);
ac93838f 364
d217f5e5 365static int bridge_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
8f7b13ef
SZ		 366static void bridge_mutecaps(struct bridge_ifinfo *, struct ifnet *, int);
367static void bridge_ifdetach(void *, struct ifnet *);
ac93838f 368static void bridge_init(void *);
70d9a675 369static int bridge_from_us(struct bridge_softc *, struct ether_header *);
867cc45a 370static void bridge_stop(struct ifnet *);
d217f5e5
SU		 371static void bridge_start(struct ifnet *);
372static struct mbuf *bridge_input(struct ifnet *, struct mbuf *);
eb366364 373static int bridge_output(struct ifnet *, struct mbuf *);
70d9a675 374static struct ifnet *bridge_interface(void *if_bridge);
d217f5e5
SU		 375
376static void bridge_forward(struct bridge_softc *, struct mbuf *m);
377
002c1265 378static void bridge_timer_handler(netmsg_t);
d217f5e5
SU		 379static void bridge_timer(void *);
380
137aa7b3 381static void bridge_start_bcast(struct bridge_softc *, struct mbuf *);
d217f5e5 382static void bridge_broadcast(struct bridge_softc *, struct ifnet *,
137aa7b3 383 struct mbuf *);
d217f5e5
SU		 384static void bridge_span(struct bridge_softc *, struct mbuf *);
385
386static int bridge_rtupdate(struct bridge_softc *, const uint8_t *,
4394693c 387 struct ifnet *, uint8_t);
d217f5e5 388static struct ifnet *bridge_rtlookup(struct bridge_softc *, const uint8_t *);
4394693c 389static void bridge_rtreap(struct bridge_softc *);
30ced003 390static void bridge_rtreap_async(struct bridge_softc *);
d217f5e5 391static void bridge_rttrim(struct bridge_softc *);
4394693c 392static int bridge_rtage_finddead(struct bridge_softc *);
d217f5e5
SU		 393static void bridge_rtage(struct bridge_softc *);
394static void bridge_rtflush(struct bridge_softc *, int);
395static int bridge_rtdaddr(struct bridge_softc *, const uint8_t *);
4394693c
SZ		 396static int bridge_rtsaddr(struct bridge_softc *, const uint8_t *,
397 struct ifnet *, uint8_t);
398static void bridge_rtmsg_sync(struct bridge_softc *sc);
002c1265
MD		 399static void bridge_rtreap_handler(netmsg_t);
400static void bridge_rtinstall_handler(netmsg_t);
4394693c
SZ		 401static int bridge_rtinstall_oncpu(struct bridge_softc *, const uint8_t *,
402 struct ifnet *, int, uint8_t, struct bridge_rtinfo **);
403
404static void bridge_rtable_init(struct bridge_softc *);
d217f5e5
SU		 405static void bridge_rtable_fini(struct bridge_softc *);
406
407static int bridge_rtnode_addr_cmp(const uint8_t *, const uint8_t *);
408static struct bridge_rtnode *bridge_rtnode_lookup(struct bridge_softc *,
409 const uint8_t *);
4394693c 410static void bridge_rtnode_insert(struct bridge_softc *,
d217f5e5
SU		 411 struct bridge_rtnode *);
412static void bridge_rtnode_destroy(struct bridge_softc *,
413 struct bridge_rtnode *);
414
415static struct bridge_iflist *bridge_lookup_member(struct bridge_softc *,
416 const char *name);
417static struct bridge_iflist *bridge_lookup_member_if(struct bridge_softc *,
418 struct ifnet *ifp);
8f7b13ef
SZ		 419static struct bridge_iflist *bridge_lookup_member_ifinfo(struct bridge_softc *,
420 struct bridge_ifinfo *);
d217f5e5
SU		 421static void bridge_delete_member(struct bridge_softc *,
422 struct bridge_iflist *, int);
423static void bridge_delete_span(struct bridge_softc *,
424 struct bridge_iflist *);
425
0b326f64
SZ		 426static int bridge_control(struct bridge_softc *, u_long,
427 bridge_ctl_t, void *);
d71129d9
SZ		 428static int bridge_ioctl_init(struct bridge_softc *, void *);
429static int bridge_ioctl_stop(struct bridge_softc *, void *);
d217f5e5
SU		 430static int bridge_ioctl_add(struct bridge_softc *, void *);
431static int bridge_ioctl_del(struct bridge_softc *, void *);
70d9a675
MD		 432static void bridge_ioctl_fillflags(struct bridge_softc *sc,
433 struct bridge_iflist *bif, struct ifbreq *req);
d217f5e5
SU		 434static int bridge_ioctl_gifflags(struct bridge_softc *, void *);
435static int bridge_ioctl_sifflags(struct bridge_softc *, void *);
436static int bridge_ioctl_scache(struct bridge_softc *, void *);
437static int bridge_ioctl_gcache(struct bridge_softc *, void *);
438static int bridge_ioctl_gifs(struct bridge_softc *, void *);
439static int bridge_ioctl_rts(struct bridge_softc *, void *);
440static int bridge_ioctl_saddr(struct bridge_softc *, void *);
441static int bridge_ioctl_sto(struct bridge_softc *, void *);
442static int bridge_ioctl_gto(struct bridge_softc *, void *);
443static int bridge_ioctl_daddr(struct bridge_softc *, void *);
444static int bridge_ioctl_flush(struct bridge_softc *, void *);
445static int bridge_ioctl_gpri(struct bridge_softc *, void *);
446static int bridge_ioctl_spri(struct bridge_softc *, void *);
447static int bridge_ioctl_ght(struct bridge_softc *, void *);
448static int bridge_ioctl_sht(struct bridge_softc *, void *);
449static int bridge_ioctl_gfd(struct bridge_softc *, void *);
450static int bridge_ioctl_sfd(struct bridge_softc *, void *);
451static int bridge_ioctl_gma(struct bridge_softc *, void *);
452static int bridge_ioctl_sma(struct bridge_softc *, void *);
453static int bridge_ioctl_sifprio(struct bridge_softc *, void *);
454static int bridge_ioctl_sifcost(struct bridge_softc *, void *);
455static int bridge_ioctl_addspan(struct bridge_softc *, void *);
456static int bridge_ioctl_delspan(struct bridge_softc *, void *);
457static int bridge_pfil(struct mbuf **, struct ifnet *, struct ifnet *,
458 int);
459static int bridge_ip_checkbasic(struct mbuf **mp);
460#ifdef INET6
461static int bridge_ip6_checkbasic(struct mbuf **mp);
462#endif /* INET6 */
463static int bridge_fragment(struct ifnet *, struct mbuf *,
464 struct ether_header *, int, struct llc *);
002c1265 465static void bridge_enqueue_handler(netmsg_t);
70d9a675
MD		 466static void bridge_handoff(struct bridge_softc *, struct ifnet *,
467 struct mbuf *, int);
ac93838f 468
002c1265
MD		 469static void bridge_del_bif_handler(netmsg_t);
470static void bridge_add_bif_handler(netmsg_t);
8f7b13ef
SZ		 471static void bridge_del_bif(struct bridge_softc *, struct bridge_ifinfo *,
472 struct bridge_iflist_head *);
473static void bridge_add_bif(struct bridge_softc *, struct bridge_ifinfo *,
474 struct ifnet *);
8f7b13ef 475
ac93838f
SS		 476SYSCTL_DECL(_net_link);
477SYSCTL_NODE(_net_link, IFT_BRIDGE, bridge, CTLFLAG_RW, 0, "Bridge");
478
d217f5e5 479static int pfil_onlyip = 1; /* only pass IP[46] packets when pfil is enabled */
ac93838f
SS		 480static int pfil_bridge = 1; /* run pfil hooks on the bridge interface */
481static int pfil_member = 1; /* run pfil hooks on the member interface */
70d9a675 482static int bridge_debug;
d217f5e5
SU		 483SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_onlyip, CTLFLAG_RW,
484 &pfil_onlyip, 0, "Only pass IP packets when pfil is enabled");
ac93838f
SS		 485SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_bridge, CTLFLAG_RW,
486 &pfil_bridge, 0, "Packet filter on the bridge interface");
487SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_member, CTLFLAG_RW,
488 &pfil_member, 0, "Packet filter on the member interface");
70d9a675
MD		 489SYSCTL_INT(_net_link_bridge, OID_AUTO, debug, CTLFLAG_RW,
490 &bridge_debug, 0, "Bridge debug mode");
ac93838f 491
2d4d3c93
SZ		 492struct bridge_control_arg {
493 union {
494 struct ifbreq ifbreq;
495 struct ifbifconf ifbifconf;
496 struct ifbareq ifbareq;
497 struct ifbaconf ifbaconf;
498 struct ifbrparam ifbrparam;
499 } bca_u;
500 int bca_len;
501 void *bca_uptr;
502 void *bca_kptr;
503};
504
ac93838f 505struct bridge_control {
23cf9e67
SZ		 506 bridge_ctl_t bc_func;
507 int bc_argsize;
508 int bc_flags;
ac93838f
SS		 509};
510
511#define BC_F_COPYIN 0x01 /* copy arguments in */
512#define BC_F_COPYOUT 0x02 /* copy arguments out */
513#define BC_F_SUSER 0x04 /* do super-user check */
514
515const struct bridge_control bridge_control_table[] = {
516 { bridge_ioctl_add, sizeof(struct ifbreq),
517 BC_F_COPYIN|BC_F_SUSER },
518 { bridge_ioctl_del, sizeof(struct ifbreq),
519 BC_F_COPYIN|BC_F_SUSER },
520
521 { bridge_ioctl_gifflags, sizeof(struct ifbreq),
522 BC_F_COPYIN|BC_F_COPYOUT },
523 { bridge_ioctl_sifflags, sizeof(struct ifbreq),
524 BC_F_COPYIN|BC_F_SUSER },
525
526 { bridge_ioctl_scache, sizeof(struct ifbrparam),
527 BC_F_COPYIN|BC_F_SUSER },
528 { bridge_ioctl_gcache, sizeof(struct ifbrparam),
529 BC_F_COPYOUT },
530
531 { bridge_ioctl_gifs, sizeof(struct ifbifconf),
532 BC_F_COPYIN|BC_F_COPYOUT },
533 { bridge_ioctl_rts, sizeof(struct ifbaconf),
534 BC_F_COPYIN|BC_F_COPYOUT },
535
536 { bridge_ioctl_saddr, sizeof(struct ifbareq),
537 BC_F_COPYIN|BC_F_SUSER },
538
539 { bridge_ioctl_sto, sizeof(struct ifbrparam),
540 BC_F_COPYIN|BC_F_SUSER },
541 { bridge_ioctl_gto, sizeof(struct ifbrparam),
542 BC_F_COPYOUT },
543
544 { bridge_ioctl_daddr, sizeof(struct ifbareq),
545 BC_F_COPYIN|BC_F_SUSER },
546
547 { bridge_ioctl_flush, sizeof(struct ifbreq),
548 BC_F_COPYIN|BC_F_SUSER },
549
550 { bridge_ioctl_gpri, sizeof(struct ifbrparam),
551 BC_F_COPYOUT },
552 { bridge_ioctl_spri, sizeof(struct ifbrparam),
553 BC_F_COPYIN|BC_F_SUSER },
554
555 { bridge_ioctl_ght, sizeof(struct ifbrparam),
556 BC_F_COPYOUT },
557 { bridge_ioctl_sht, sizeof(struct ifbrparam),
558 BC_F_COPYIN|BC_F_SUSER },
559
560 { bridge_ioctl_gfd, sizeof(struct ifbrparam),
561 BC_F_COPYOUT },
562 { bridge_ioctl_sfd, sizeof(struct ifbrparam),
563 BC_F_COPYIN|BC_F_SUSER },
564
565 { bridge_ioctl_gma, sizeof(struct ifbrparam),
566 BC_F_COPYOUT },
567 { bridge_ioctl_sma, sizeof(struct ifbrparam),
568 BC_F_COPYIN|BC_F_SUSER },
569
570 { bridge_ioctl_sifprio, sizeof(struct ifbreq),
571 BC_F_COPYIN|BC_F_SUSER },
572
573 { bridge_ioctl_sifcost, sizeof(struct ifbreq),
574 BC_F_COPYIN|BC_F_SUSER },
d217f5e5
SU		 575
576 { bridge_ioctl_addspan, sizeof(struct ifbreq),
577 BC_F_COPYIN|BC_F_SUSER },
578 { bridge_ioctl_delspan, sizeof(struct ifbreq),
579 BC_F_COPYIN|BC_F_SUSER },
ac93838f 580};
c157ff7a 581static const int bridge_control_table_size = NELEM(bridge_control_table);
ac93838f 582
ac93838f
SS		 583LIST_HEAD(, bridge_softc) bridge_list;
584
585struct if_clone bridge_cloner = IF_CLONE_INITIALIZER("bridge",
d217f5e5 586 bridge_clone_create,
ac93838f
SS		 587 bridge_clone_destroy, 0, IF_MAXUNIT);
588
589static int
590bridge_modevent(module_t mod, int type, void *data)
591{
ac93838f
SS		 592 switch (type) {
593 case MOD_LOAD:
594 LIST_INIT(&bridge_list);
595 if_clone_attach(&bridge_cloner);
596 bridge_input_p = bridge_input;
e1d2145d 597 bridge_output_p = bridge_output;
70d9a675 598 bridge_interface_p = bridge_interface;
d217f5e5
SU		 599 bridge_detach_cookie = EVENTHANDLER_REGISTER(
600 ifnet_detach_event, bridge_ifdetach, NULL,
601 EVENTHANDLER_PRI_ANY);
ac93838f 602#if notyet
ac93838f
SS		 603 bstp_linkstate_p = bstp_linkstate;
604#endif
605 break;
606 case MOD_UNLOAD:
607 if (!LIST_EMPTY(&bridge_list))
d217f5e5
SU		 608 return (EBUSY);
609 EVENTHANDLER_DEREGISTER(ifnet_detach_event,
610 bridge_detach_cookie);
ac93838f
SS		 611 if_clone_detach(&bridge_cloner);
612 bridge_input_p = NULL;
613 bridge_output_p = NULL;
70d9a675 614 bridge_interface_p = NULL;
ac93838f 615#if notyet
ac93838f
SS		 616 bstp_linkstate_p = NULL;
617#endif
618 break;
619 default:
d217f5e5 620 return (EOPNOTSUPP);
ac93838f 621 }
d217f5e5 622 return (0);
ac93838f
SS		 623}
624
625static moduledata_t bridge_mod = {
d217f5e5
SU		 626 "if_bridge",
627 bridge_modevent,
ac93838f
SS		 628 0
629};
630
631DECLARE_MODULE(if_bridge, bridge_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
632
633
634/*
635 * bridge_clone_create:
636 *
637 * Create a new bridge instance.
638 */
d217f5e5 639static int
d14ef41e 640bridge_clone_create(struct if_clone *ifc, int unit, caddr_t param __unused)
ac93838f
SS		 641{
642 struct bridge_softc *sc;
643 struct ifnet *ifp;
644 u_char eaddr[6];
d76dd5c7 645 int cpu, rnd;
ac93838f 646
8f7b13ef 647 sc = kmalloc(sizeof(*sc), M_DEVBUF, M_WAITOK | M_ZERO);
ac93838f
SS		 648 ifp = sc->sc_ifp = &sc->sc_if;
649
650 sc->sc_brtmax = BRIDGE_RTABLE_MAX;
651 sc->sc_brttimeout = BRIDGE_RTABLE_TIMEOUT;
652 sc->sc_bridge_max_age = BSTP_DEFAULT_MAX_AGE;
653 sc->sc_bridge_hello_time = BSTP_DEFAULT_HELLO_TIME;
654 sc->sc_bridge_forward_delay = BSTP_DEFAULT_FORWARD_DELAY;
655 sc->sc_bridge_priority = BSTP_DEFAULT_BRIDGE_PRIORITY;
656 sc->sc_hold_time = BSTP_DEFAULT_HOLD_TIME;
657
658 /* Initialize our routing table. */
659 bridge_rtable_init(sc);
660
661 callout_init(&sc->sc_brcallout);
48e7b118 662 netmsg_init(&sc->sc_brtimemsg, NULL, &netisr_adone_rport,
b95665d8 663 MSGF_DROPABLE, bridge_timer_handler);
002c1265 664 sc->sc_brtimemsg.lmsg.u.ms_resultp = sc;
e9d22060 665
ac93838f 666 callout_init(&sc->sc_bstpcallout);
48e7b118 667 netmsg_init(&sc->sc_bstptimemsg, NULL, &netisr_adone_rport,
b95665d8 668 MSGF_DROPABLE, bstp_tick_handler);
002c1265 669 sc->sc_bstptimemsg.lmsg.u.ms_resultp = sc;
ac93838f 670
8f7b13ef
SZ		 671 /* Initialize per-cpu member iface lists */
672 sc->sc_iflists = kmalloc(sizeof(*sc->sc_iflists) * ncpus,
673 M_DEVBUF, M_WAITOK);
674 for (cpu = 0; cpu < ncpus; ++cpu)
70d9a675 675 TAILQ_INIT(&sc->sc_iflists[cpu]);
8f7b13ef 676
70d9a675 677 TAILQ_INIT(&sc->sc_spanlist);
ac93838f
SS		 678
679 ifp->if_softc = sc;
680 if_initname(ifp, ifc->ifc_name, unit);
681 ifp->if_mtu = ETHERMTU;
d217f5e5 682 ifp->if_flags = IFF_BROADCAST | IFF_MULTICAST;
ac93838f
SS		 683 ifp->if_ioctl = bridge_ioctl;
684 ifp->if_start = bridge_start;
685 ifp->if_init = bridge_init;
70d9a675 686 ifp->if_type = IFT_ETHER;
ac93838f 687 ifq_set_maxlen(&ifp->if_snd, ifqmaxlen);
ac93838f
SS		 688 ifq_set_ready(&ifp->if_snd);
689 ifp->if_hdrlen = ETHER_HDR_LEN;
690
691 /*
692 * Generate a random ethernet address and use the private AC:DE:48
693 * OUI code.
694 */
d76dd5c7
SZ		 695 rnd = karc4random();
696 bcopy(&rnd, &eaddr[0], 4); /* ETHER_ADDR_LEN == 6 */
697 rnd = karc4random();
698 bcopy(&rnd, &eaddr[2], 4); /* ETHER_ADDR_LEN == 6 */
699
700 eaddr[0] &= ~1; /* clear multicast bit */
701 eaddr[0] |= 2; /* set the LAA bit */
ac93838f
SS		 702
703 ether_ifattach(ifp, eaddr, NULL);
704 /* Now undo some of the damage... */
705 ifp->if_baudrate = 0;
70d9a675 706 /*ifp->if_type = IFT_BRIDGE;*/
ac93838f 707
ac308789 708 crit_enter(); /* XXX MP */
ac93838f
SS		 709 LIST_INSERT_HEAD(&bridge_list, sc, sc_list);
710 crit_exit();
711
712 return (0);
713}
714
34db64a6 715static void
002c1265 716bridge_delete_dispatch(netmsg_t msg)
34db64a6 717{
002c1265 718 struct bridge_softc *sc = msg->lmsg.u.ms_resultp;
34db64a6
SZ		 719 struct ifnet *bifp = sc->sc_ifp;
720 struct bridge_iflist *bif;
721
a3dd34d2 722 ifnet_serialize_all(bifp);
34db64a6 723
70d9a675 724 while ((bif = TAILQ_FIRST(&sc->sc_iflists[mycpuid])) != NULL)
34db64a6
SZ		 725 bridge_delete_member(sc, bif, 0);
726
70d9a675 727 while ((bif = TAILQ_FIRST(&sc->sc_spanlist)) != NULL)
34db64a6
SZ		 728 bridge_delete_span(sc, bif);
729
a3dd34d2 730 ifnet_deserialize_all(bifp);
34db64a6 731
002c1265 732 lwkt_replymsg(&msg->lmsg, 0);
34db64a6
SZ		 733}
734
ac93838f
SS		 735/*
736 * bridge_clone_destroy:
737 *
738 * Destroy a bridge instance.
739 */
a7e9152e 740static int
ac93838f
SS		 741bridge_clone_destroy(struct ifnet *ifp)
742{
743 struct bridge_softc *sc = ifp->if_softc;
002c1265 744 struct netmsg_base msg;
ac93838f 745
a3dd34d2 746 ifnet_serialize_all(ifp);
ac93838f 747
867cc45a 748 bridge_stop(ifp);
ac93838f
SS		 749 ifp->if_flags &= ~IFF_UP;
750
a3dd34d2 751 ifnet_deserialize_all(ifp);
ac93838f 752
002c1265 753 netmsg_init(&msg, NULL, &curthread->td_msgport,
48e7b118 754 0, bridge_delete_dispatch);
002c1265
MD		 755 msg.lmsg.u.ms_resultp = sc;
756 lwkt_domsg(BRIDGE_CFGPORT, &msg.lmsg, 0);
34db64a6
SZ		 757
758 crit_enter(); /* XXX MP */
ac93838f
SS		 759 LIST_REMOVE(sc, sc_list);
760 crit_exit();
761
762 ether_ifdetach(ifp);
763
ac93838f
SS		 764 /* Tear down the routing table. */
765 bridge_rtable_fini(sc);
766
8f7b13ef
SZ		 767 /* Free per-cpu member iface lists */
768 kfree(sc->sc_iflists, M_DEVBUF);
769
efda3bd0 770 kfree(sc, M_DEVBUF);
a7e9152e
SZ		 771
772 return 0;
ac93838f
SS		 773}
774
775/*
776 * bridge_ioctl:
777 *
778 * Handle a control request from the operator.
779 */
d217f5e5 780static int
ac93838f
SS		 781bridge_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr)
782{
783 struct bridge_softc *sc = ifp->if_softc;
2d4d3c93 784 struct bridge_control_arg args;
ac93838f
SS		 785 struct ifdrv *ifd = (struct ifdrv *) data;
786 const struct bridge_control *bc;
787 int error = 0;
788
2c9effcf 789 ASSERT_IFNET_SERIALIZED_ALL(ifp);
ac93838f 790
867cc45a 791 switch (cmd) {
ac93838f
SS		 792 case SIOCADDMULTI:
793 case SIOCDELMULTI:
794 break;
795
796 case SIOCGDRVSPEC:
797 case SIOCSDRVSPEC:
798 if (ifd->ifd_cmd >= bridge_control_table_size) {
799 error = EINVAL;
800 break;
801 }
802 bc = &bridge_control_table[ifd->ifd_cmd];
803
804 if (cmd == SIOCGDRVSPEC &&
805 (bc->bc_flags & BC_F_COPYOUT) == 0) {
806 error = EINVAL;
807 break;
867cc45a 808 } else if (cmd == SIOCSDRVSPEC &&
2d4d3c93 809 (bc->bc_flags & BC_F_COPYOUT)) {
ac93838f
SS		 810 error = EINVAL;
811 break;
812 }
813
814 if (bc->bc_flags & BC_F_SUSER) {
895c1f85 815 error = priv_check_cred(cr, PRIV_ROOT, NULL_CRED_OKAY);
ac93838f
SS		 816 if (error)
817 break;
818 }
819
820 if (ifd->ifd_len != bc->bc_argsize ||
2d4d3c93 821 ifd->ifd_len > sizeof(args.bca_u)) {
ac93838f
SS		 822 error = EINVAL;
823 break;
824 }
825
60d8d1d3 826 memset(&args, 0, sizeof(args));
ac93838f 827 if (bc->bc_flags & BC_F_COPYIN) {
2d4d3c93
SZ		 828 error = copyin(ifd->ifd_data, &args.bca_u,
829 ifd->ifd_len);
ac93838f
SS		 830 if (error)
831 break;
832 }
833
0b326f64 834 error = bridge_control(sc, cmd, bc->bc_func, &args);
2d4d3c93
SZ		 835 if (error) {
836 KKASSERT(args.bca_len == 0 && args.bca_kptr == NULL);
ac93838f 837 break;
2d4d3c93 838 }
ac93838f 839
2d4d3c93 840 if (bc->bc_flags & BC_F_COPYOUT) {
ac93838f 841 error = copyout(&args, ifd->ifd_data, ifd->ifd_len);
2d4d3c93
SZ		 842 if (args.bca_len != 0) {
843 KKASSERT(args.bca_kptr != NULL);
844 if (!error) {
845 error = copyout(args.bca_kptr,
846 args.bca_uptr, args.bca_len);
847 }
848 kfree(args.bca_kptr, M_TEMP);
849 } else {
850 KKASSERT(args.bca_kptr == NULL);
851 }
852 } else {
853 KKASSERT(args.bca_len == 0 && args.bca_kptr == NULL);
854 }
ac93838f
SS		 855 break;
856
857 case SIOCSIFFLAGS:
858 if (!(ifp->if_flags & IFF_UP) &&
859 (ifp->if_flags & IFF_RUNNING)) {
860 /*
861 * If interface is marked down and it is running,
867cc45a 862 * then stop it.
ac93838f 863 */
867cc45a 864 bridge_stop(ifp);
ac93838f
SS		 865 } else if ((ifp->if_flags & IFF_UP) &&
866 !(ifp->if_flags & IFF_RUNNING)) {
867 /*
868 * If interface is marked up and it is stopped, then
869 * start it.
870 */
867cc45a 871 ifp->if_init(sc);
ac93838f
SS		 872 }
873 break;
874
875 case SIOCSIFMTU:
876 /* Do not allow the MTU to be changed on the bridge */
877 error = EINVAL;
878 break;
879
880 default:
ac93838f
SS		 881 error = ether_ioctl(ifp, cmd, data);
882 break;
883 }
ac93838f
SS		 884 return (error);
885}
886
887/*
d217f5e5
SU		 888 * bridge_mutecaps:
889 *
890 * Clear or restore unwanted capabilities on the member interface
891 */
892static void
8f7b13ef 893bridge_mutecaps(struct bridge_ifinfo *bif_info, struct ifnet *ifp, int mute)
d217f5e5 894{
d217f5e5
SU		 895 struct ifreq ifr;
896 int error;
897
898 if (ifp->if_ioctl == NULL)
899 return;
900
901 bzero(&ifr, sizeof(ifr));
902 ifr.ifr_reqcap = ifp->if_capenable;
903
904 if (mute) {
905 /* mask off and save capabilities */
8f7b13ef
SZ		 906 bif_info->bifi_mutecap = ifr.ifr_reqcap & BRIDGE_IFCAPS_MASK;
907 if (bif_info->bifi_mutecap != 0)
d217f5e5 908 ifr.ifr_reqcap &= ~BRIDGE_IFCAPS_MASK;
68b979e7 909 } else {
d217f5e5 910 /* restore muted capabilities */
8f7b13ef 911 ifr.ifr_reqcap |= bif_info->bifi_mutecap;
68b979e7 912 }
d217f5e5 913
8f7b13ef 914 if (bif_info->bifi_mutecap != 0) {
a3dd34d2 915 ifnet_serialize_all(ifp);
68b979e7 916 error = ifp->if_ioctl(ifp, SIOCSIFCAP, (caddr_t)&ifr, NULL);
a3dd34d2 917 ifnet_deserialize_all(ifp);
d217f5e5
SU		 918 }
919}
920
921/*
ac93838f
SS		 922 * bridge_lookup_member:
923 *
924 * Lookup a bridge member interface.
925 */
d217f5e5 926static struct bridge_iflist *
ac93838f
SS		 927bridge_lookup_member(struct bridge_softc *sc, const char *name)
928{
929 struct bridge_iflist *bif;
ac93838f 930
70d9a675 931 TAILQ_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next) {
8f7b13ef 932 if (strcmp(bif->bif_ifp->if_xname, name) == 0)
ac93838f
SS		 933 return (bif);
934 }
ac93838f
SS		 935 return (NULL);
936}
937
938/*
939 * bridge_lookup_member_if:
940 *
941 * Lookup a bridge member interface by ifnet*.
942 */
d217f5e5 943static struct bridge_iflist *
ac93838f
SS		 944bridge_lookup_member_if(struct bridge_softc *sc, struct ifnet *member_ifp)
945{
946 struct bridge_iflist *bif;
947
70d9a675 948 TAILQ_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next) {
ac93838f
SS		 949 if (bif->bif_ifp == member_ifp)
950 return (bif);
951 }
8f7b13ef
SZ		 952 return (NULL);
953}
ac93838f 954
8f7b13ef
SZ		 955/*
956 * bridge_lookup_member_ifinfo:
957 *
958 * Lookup a bridge member interface by bridge_ifinfo.
959 */
960static struct bridge_iflist *
961bridge_lookup_member_ifinfo(struct bridge_softc *sc,
962 struct bridge_ifinfo *bif_info)
963{
964 struct bridge_iflist *bif;
965
70d9a675 966 TAILQ_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next) {
8f7b13ef
SZ		 967 if (bif->bif_info == bif_info)
968 return (bif);
969 }
ac93838f
SS		 970 return (NULL);
971}
972
973/*
974 * bridge_delete_member:
975 *
976 * Delete the specified member interface.
977 */
d217f5e5
SU		 978static void
979bridge_delete_member(struct bridge_softc *sc, struct bridge_iflist *bif,
980 int gone)
ac93838f
SS		 981{
982 struct ifnet *ifs = bif->bif_ifp;
bdfc79d0 983 struct ifnet *bifp = sc->sc_ifp;
8f7b13ef
SZ		 984 struct bridge_ifinfo *bif_info = bif->bif_info;
985 struct bridge_iflist_head saved_bifs;
bdfc79d0 986
2c9effcf 987 ASSERT_IFNET_SERIALIZED_ALL(bifp);
8f7b13ef 988 KKASSERT(bif_info != NULL);
bdfc79d0
SZ		 989
990 ifs->if_bridge = NULL;
297c8124
SZ		 991
992 /*
993 * Release bridge interface's serializer:
994 * - To avoid possible dead lock.
8f7b13ef 995 * - Various sync operation will block the current thread.
297c8124 996 */
a3dd34d2 997 ifnet_deserialize_all(bifp);
297c8124 998
d217f5e5
SU		 999 if (!gone) {
1000 switch (ifs->if_type) {
1001 case IFT_ETHER:
1002 case IFT_L2VLAN:
1003 /*
1004 * Take the interface out of promiscuous mode.
1005 */
bdfc79d0 1006 ifpromisc(ifs, 0);
8f7b13ef 1007 bridge_mutecaps(bif_info, ifs, 0);
d217f5e5 1008 break;
ac93838f 1009
d217f5e5
SU		 1010 case IFT_GIF:
1011 break;
ac93838f 1012
d217f5e5 1013 default:
d217f5e5 1014 panic("bridge_delete_member: impossible");
d217f5e5
SU		 1015 break;
1016 }
ac93838f
SS		 1017 }
1018
8f7b13ef
SZ		 1019 /*
1020 * Remove bifs from percpu linked list.
1021 *
1022 * Removed bifs are not freed immediately, instead,
1023 * they are saved in saved_bifs. They will be freed
1024 * after we make sure that no one is accessing them,
1025 * i.e. after following netmsg_service_sync()
1026 */
70d9a675 1027 TAILQ_INIT(&saved_bifs);
8f7b13ef
SZ		 1028 bridge_del_bif(sc, bif_info, &saved_bifs);
1029
1030 /*
1031 * Make sure that all protocol threads:
1032 * o see 'ifs' if_bridge is changed
1033 * o know that bif is removed from the percpu linked list
1034 */
1035 netmsg_service_sync();
1036
1037 /*
1038 * Free the removed bifs
1039 */
70d9a675
MD		 1040 KKASSERT(!TAILQ_EMPTY(&saved_bifs));
1041 while ((bif = TAILQ_FIRST(&saved_bifs)) != NULL) {
1042 TAILQ_REMOVE(&saved_bifs, bif, bif_next);
8f7b13ef
SZ		 1043 kfree(bif, M_DEVBUF);
1044 }
1045
4394693c
SZ		 1046 /* See the comment in bridge_ioctl_stop() */
1047 bridge_rtmsg_sync(sc);
30ced003 1048 bridge_rtdelete(sc, ifs, IFBF_FLUSHALL | IFBF_FLUSHSYNC);
4394693c 1049
a3dd34d2 1050 ifnet_serialize_all(bifp);
297c8124 1051
8f7b13ef 1052 if (bifp->if_flags & IFF_RUNNING)
ac93838f 1053 bstp_initialization(sc);
8f7b13ef
SZ		 1054
1055 /*
1056 * Free the bif_info after bstp_initialization(), so that
1057 * bridge_softc.sc_root_port will not reference a dangling
1058 * pointer.
1059 */
1060 kfree(bif_info, M_DEVBUF);
ac93838f
SS		 1061}
1062
d217f5e5
SU		 1063/*
1064 * bridge_delete_span:
1065 *
1066 * Delete the specified span interface.
1067 */
1068static void
1069bridge_delete_span(struct bridge_softc *sc, struct bridge_iflist *bif)
1070{
1071 KASSERT(bif->bif_ifp->if_bridge == NULL,
1072 ("%s: not a span interface", __func__));
1073
70d9a675 1074 TAILQ_REMOVE(&sc->sc_iflists[mycpuid], bif, bif_next);
efda3bd0 1075 kfree(bif, M_DEVBUF);
d217f5e5
SU		 1076}
1077
1078static int
d71129d9
SZ		 1079bridge_ioctl_init(struct bridge_softc *sc, void *arg __unused)
1080{
1081 struct ifnet *ifp = sc->sc_ifp;
1082
1083 if (ifp->if_flags & IFF_RUNNING)
1084 return 0;
1085
1086 callout_reset(&sc->sc_brcallout, bridge_rtable_prune_period * hz,
1087 bridge_timer, sc);
1088
1089 ifp->if_flags |= IFF_RUNNING;
1090 bstp_initialization(sc);
1091 return 0;
1092}
1093
1094static int
1095bridge_ioctl_stop(struct bridge_softc *sc, void *arg __unused)
1096{
1097 struct ifnet *ifp = sc->sc_ifp;
e9d22060 1098 struct lwkt_msg *lmsg;
d71129d9
SZ		 1099
1100 if ((ifp->if_flags & IFF_RUNNING) == 0)
1101 return 0;
1102
1103 callout_stop(&sc->sc_brcallout);
e9d22060
SZ		 1104
1105 crit_enter();
002c1265 1106 lmsg = &sc->sc_brtimemsg.lmsg;
e9d22060
SZ		 1107 if ((lmsg->ms_flags & MSGF_DONE) == 0) {
1108 /* Pending to be processed; drop it */
1109 lwkt_dropmsg(lmsg);
1110 }
1111 crit_exit();
1112
d71129d9
SZ		 1113 bstp_stop(sc);
1114
1115 ifp->if_flags &= ~IFF_RUNNING;
1116
a3dd34d2 1117 ifnet_deserialize_all(ifp);
4394693c
SZ		 1118
1119 /* Let everyone know that we are stopped */
1120 netmsg_service_sync();
1121
1122 /*
1123 * Sync ifnetX msgports in the order we forward rtnode
1124 * installation message. This is used to make sure that
1125 * all rtnode installation messages sent by bridge_rtupdate()
1126 * during above netmsg_service_sync() are flushed.
1127 */
1128 bridge_rtmsg_sync(sc);
30ced003 1129 bridge_rtflush(sc, IFBF_FLUSHDYN | IFBF_FLUSHSYNC);
4394693c 1130
a3dd34d2 1131 ifnet_serialize_all(ifp);
d71129d9
SZ		 1132 return 0;
1133}
1134
1135static int
ac93838f
SS		 1136bridge_ioctl_add(struct bridge_softc *sc, void *arg)
1137{
1138 struct ifbreq *req = arg;
8f7b13ef
SZ		 1139 struct bridge_iflist *bif;
1140 struct bridge_ifinfo *bif_info;
68b979e7 1141 struct ifnet *ifs, *bifp;
ac93838f
SS		 1142 int error = 0;
1143
68b979e7 1144 bifp = sc->sc_ifp;
2c9effcf 1145 ASSERT_IFNET_SERIALIZED_ALL(bifp);
68b979e7 1146
ac93838f
SS		 1147 ifs = ifunit(req->ifbr_ifsname);
1148 if (ifs == NULL)
1149 return (ENOENT);
1150
d217f5e5 1151 /* If it's in the span list, it can't be a member. */
70d9a675 1152 TAILQ_FOREACH(bif, &sc->sc_spanlist, bif_next)
d217f5e5
SU		 1153 if (ifs == bif->bif_ifp)
1154 return (EBUSY);
1155
1156 /* Allow the first Ethernet member to define the MTU */
1157 if (ifs->if_type != IFT_GIF) {
70d9a675 1158 if (TAILQ_EMPTY(&sc->sc_iflists[mycpuid])) {
68b979e7
SZ		 1159 bifp->if_mtu = ifs->if_mtu;
1160 } else if (bifp->if_mtu != ifs->if_mtu) {
1161 if_printf(bifp, "invalid MTU for %s\n", ifs->if_xname);
d217f5e5
SU		 1162 return (EINVAL);
1163 }
ac93838f
SS		 1164 }
1165
1166 if (ifs->if_bridge == sc)
1167 return (EEXIST);
1168
1169 if (ifs->if_bridge != NULL)
1170 return (EBUSY);
1171
8f7b13ef
SZ		 1172 bif_info = kmalloc(sizeof(*bif_info), M_DEVBUF, M_WAITOK | M_ZERO);
1173 bif_info->bifi_priority = BSTP_DEFAULT_PORT_PRIORITY;
1174 bif_info->bifi_path_cost = BSTP_DEFAULT_PATH_COST;
1175 bif_info->bifi_ifp = ifs;
1176
1177 /*
1178 * Release bridge interface's serializer:
1179 * - To avoid possible dead lock.
1180 * - Various sync operation will block the current thread.
1181 */
a3dd34d2 1182 ifnet_deserialize_all(bifp);
d217f5e5 1183
ac93838f
SS		 1184 switch (ifs->if_type) {
1185 case IFT_ETHER:
1186 case IFT_L2VLAN:
1187 /*
1188 * Place the interface into promiscuous mode.
1189 */
1190 error = ifpromisc(ifs, 1);
68b979e7 1191 if (error) {
a3dd34d2 1192 ifnet_serialize_all(bifp);
ac93838f 1193 goto out;
68b979e7 1194 }
8f7b13ef 1195 bridge_mutecaps(bif_info, ifs, 1);
ac93838f
SS		 1196 break;
1197
1198 case IFT_GIF: /* :^) */
1199 break;
1200
1201 default:
1202 error = EINVAL;
a3dd34d2 1203 ifnet_serialize_all(bifp);
ac93838f
SS		 1204 goto out;
1205 }
1206
8f7b13ef
SZ		 1207 /*
1208 * Add bifs to percpu linked lists
1209 */
1210 bridge_add_bif(sc, bif_info, ifs);
1211
a3dd34d2 1212 ifnet_serialize_all(bifp);
ac93838f 1213
68b979e7 1214 if (bifp->if_flags & IFF_RUNNING)
ac93838f
SS		 1215 bstp_initialization(sc);
1216 else
1217 bstp_stop(sc);
1218
68b979e7
SZ		 1219 /*
1220 * Everything has been setup, so let the member interface
1221 * deliver packets to this bridge on its input/output path.
1222 */
1223 ifs->if_bridge = sc;
d217f5e5 1224out:
ac93838f 1225 if (error) {
8f7b13ef
SZ		 1226 if (bif_info != NULL)
1227 kfree(bif_info, M_DEVBUF);
ac93838f
SS		 1228 }
1229 return (error);
1230}
1231
d217f5e5 1232static int
ac93838f
SS		 1233bridge_ioctl_del(struct bridge_softc *sc, void *arg)
1234{
1235 struct ifbreq *req = arg;
1236 struct bridge_iflist *bif;
1237
1238 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1239 if (bif == NULL)
1240 return (ENOENT);
1241
d217f5e5 1242 bridge_delete_member(sc, bif, 0);
ac93838f
SS		 1243
1244 return (0);
1245}
1246
d217f5e5 1247static int
ac93838f
SS		 1248bridge_ioctl_gifflags(struct bridge_softc *sc, void *arg)
1249{
1250 struct ifbreq *req = arg;
1251 struct bridge_iflist *bif;
1252
1253 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1254 if (bif == NULL)
1255 return (ENOENT);
70d9a675
MD		 1256 bridge_ioctl_fillflags(sc, bif, req);
1257 return (0);
1258}
ac93838f 1259
70d9a675
MD		 1260static void
1261bridge_ioctl_fillflags(struct bridge_softc *sc, struct bridge_iflist *bif,
1262 struct ifbreq *req)
1263{
ac93838f
SS		 1264 req->ifbr_ifsflags = bif->bif_flags;
1265 req->ifbr_state = bif->bif_state;
1266 req->ifbr_priority = bif->bif_priority;
1267 req->ifbr_path_cost = bif->bif_path_cost;
1268 req->ifbr_portno = bif->bif_ifp->if_index & 0xff;
70d9a675
MD		 1269 if (bif->bif_flags & IFBIF_STP) {
1270 req->ifbr_peer_root = bif->bif_peer_root;
1271 req->ifbr_peer_bridge = bif->bif_peer_bridge;
1272 req->ifbr_peer_cost = bif->bif_peer_cost;
1273 req->ifbr_peer_port = bif->bif_peer_port;
1274 if (bstp_supersedes_port_info(sc, bif)) {
1275 req->ifbr_designated_root = bif->bif_peer_root;
1276 req->ifbr_designated_bridge = bif->bif_peer_bridge;
1277 req->ifbr_designated_cost = bif->bif_peer_cost;
1278 req->ifbr_designated_port = bif->bif_peer_port;
1279 } else {
1280 req->ifbr_designated_root = sc->sc_bridge_id;
1281 req->ifbr_designated_bridge = sc->sc_bridge_id;
1282 req->ifbr_designated_cost = bif->bif_path_cost +
1283 bif->bif_peer_cost;
1284 req->ifbr_designated_port = bif->bif_port_id;
1285 }
1286 } else {
1287 req->ifbr_peer_root = 0;
1288 req->ifbr_peer_bridge = 0;
1289 req->ifbr_peer_cost = 0;
1290 req->ifbr_peer_port = 0;
1291 req->ifbr_designated_root = 0;
1292 req->ifbr_designated_bridge = 0;
1293 req->ifbr_designated_cost = 0;
1294 req->ifbr_designated_port = 0;
1295 }
ac93838f
SS		 1296}
1297
d217f5e5 1298static int
ac93838f
SS		 1299bridge_ioctl_sifflags(struct bridge_softc *sc, void *arg)
1300{
1301 struct ifbreq *req = arg;
1302 struct bridge_iflist *bif;
8f7b13ef 1303 struct ifnet *bifp = sc->sc_ifp;
ac93838f
SS		 1304
1305 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1306 if (bif == NULL)
1307 return (ENOENT);
1308
8f7b13ef 1309 if (req->ifbr_ifsflags & IFBIF_SPAN) {
d217f5e5
SU		 1310 /* SPAN is readonly */
1311 return (EINVAL);
8f7b13ef 1312 }
d217f5e5 1313
ac93838f
SS		 1314 if (req->ifbr_ifsflags & IFBIF_STP) {
1315 switch (bif->bif_ifp->if_type) {
1316 case IFT_ETHER:
1317 /* These can do spanning tree. */
1318 break;
1319
1320 default:
1321 /* Nothing else can. */
1322 return (EINVAL);
1323 }
1324 }
1325
70d9a675
MD		 1326 bif->bif_flags = (bif->bif_flags & IFBIF_KEEPMASK) |
1327 (req->ifbr_ifsflags & ~IFBIF_KEEPMASK);
8f7b13ef 1328 if (bifp->if_flags & IFF_RUNNING)
ac93838f
SS		 1329 bstp_initialization(sc);
1330
1331 return (0);
1332}
1333
d217f5e5 1334static int
ac93838f
SS		 1335bridge_ioctl_scache(struct bridge_softc *sc, void *arg)
1336{
1337 struct ifbrparam *param = arg;
4394693c 1338 struct ifnet *ifp = sc->sc_ifp;
ac93838f
SS		 1339
1340 sc->sc_brtmax = param->ifbrp_csize;
4394693c 1341
a3dd34d2 1342 ifnet_deserialize_all(ifp);
ac93838f 1343 bridge_rttrim(sc);
a3dd34d2 1344 ifnet_serialize_all(ifp);
ac93838f
SS		 1345
1346 return (0);
1347}
1348
d217f5e5 1349static int
ac93838f
SS		 1350bridge_ioctl_gcache(struct bridge_softc *sc, void *arg)
1351{
1352 struct ifbrparam *param = arg;
1353
1354 param->ifbrp_csize = sc->sc_brtmax;
1355
1356 return (0);
1357}
1358
d217f5e5 1359static int
ac93838f
SS		 1360bridge_ioctl_gifs(struct bridge_softc *sc, void *arg)
1361{
2d4d3c93 1362 struct bridge_control_arg *bc_arg = arg;
ac93838f
SS		 1363 struct ifbifconf *bifc = arg;
1364 struct bridge_iflist *bif;
2d4d3c93
SZ		 1365 struct ifbreq *breq;
1366 int count, len;
ac93838f
SS		 1367
1368 count = 0;
70d9a675 1369 TAILQ_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next)
ac93838f 1370 count++;
70d9a675 1371 TAILQ_FOREACH(bif, &sc->sc_spanlist, bif_next)
d217f5e5 1372 count++;
ac93838f
SS		 1373
1374 if (bifc->ifbic_len == 0) {
2d4d3c93
SZ		 1375 bifc->ifbic_len = sizeof(*breq) * count;
1376 return 0;
1377 } else if (count == 0 || bifc->ifbic_len < sizeof(*breq)) {
1378 bifc->ifbic_len = 0;
1379 return 0;
1380 }
1381
1382 len = min(bifc->ifbic_len, sizeof(*breq) * count);
1383 KKASSERT(len >= sizeof(*breq));
1384
d15c1fc9 1385 breq = kmalloc(len, M_TEMP, M_WAITOK | M_NULLOK | M_ZERO);
2d4d3c93
SZ		 1386 if (breq == NULL) {
1387 bifc->ifbic_len = 0;
1388 return ENOMEM;
ac93838f 1389 }
2d4d3c93 1390 bc_arg->bca_kptr = breq;
ac93838f
SS		 1391
1392 count = 0;
70d9a675 1393 TAILQ_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next) {
2d4d3c93 1394 if (len < sizeof(*breq))
ac93838f
SS		 1395 break;
1396
2d4d3c93
SZ		 1397 strlcpy(breq->ifbr_ifsname, bif->bif_ifp->if_xname,
1398 sizeof(breq->ifbr_ifsname));
70d9a675 1399 bridge_ioctl_fillflags(sc, bif, breq);
2d4d3c93 1400 breq++;
ac93838f 1401 count++;
2d4d3c93 1402 len -= sizeof(*breq);
ac93838f 1403 }
70d9a675 1404 TAILQ_FOREACH(bif, &sc->sc_spanlist, bif_next) {
2d4d3c93 1405 if (len < sizeof(*breq))
d217f5e5
SU		 1406 break;
1407
2d4d3c93
SZ		 1408 strlcpy(breq->ifbr_ifsname, bif->bif_ifp->if_xname,
1409 sizeof(breq->ifbr_ifsname));
1410 breq->ifbr_ifsflags = bif->bif_flags;
2d4d3c93
SZ		 1411 breq->ifbr_portno = bif->bif_ifp->if_index & 0xff;
1412 breq++;
d217f5e5 1413 count++;
2d4d3c93 1414 len -= sizeof(*breq);
d217f5e5 1415 }
ac93838f 1416
2d4d3c93
SZ		 1417 bifc->ifbic_len = sizeof(*breq) * count;
1418 KKASSERT(bifc->ifbic_len > 0);
1419
1420 bc_arg->bca_len = bifc->ifbic_len;
1421 bc_arg->bca_uptr = bifc->ifbic_req;
1422 return 0;
ac93838f
SS		 1423}
1424
d217f5e5 1425static int
ac93838f
SS		 1426bridge_ioctl_rts(struct bridge_softc *sc, void *arg)
1427{
2d4d3c93 1428 struct bridge_control_arg *bc_arg = arg;
ac93838f
SS		 1429 struct ifbaconf *bac = arg;
1430 struct bridge_rtnode *brt;
2d4d3c93
SZ		 1431 struct ifbareq *bareq;
1432 int count, len;
ac93838f 1433
2d4d3c93 1434 count = 0;
4394693c 1435 LIST_FOREACH(brt, &sc->sc_rtlists[mycpuid], brt_list)
2d4d3c93 1436 count++;
ac93838f 1437
2d4d3c93
SZ		 1438 if (bac->ifbac_len == 0) {
1439 bac->ifbac_len = sizeof(*bareq) * count;
1440 return 0;
1441 } else if (count == 0 || bac->ifbac_len < sizeof(*bareq)) {
1442 bac->ifbac_len = 0;
1443 return 0;
1444 }
1445
1446 len = min(bac->ifbac_len, sizeof(*bareq) * count);
1447 KKASSERT(len >= sizeof(*bareq));
1448
d15c1fc9 1449 bareq = kmalloc(len, M_TEMP, M_WAITOK | M_NULLOK | M_ZERO);
2d4d3c93
SZ		 1450 if (bareq == NULL) {
1451 bac->ifbac_len = 0;
1452 return ENOMEM;
1453 }
1454 bc_arg->bca_kptr = bareq;
1455
1456 count = 0;
4394693c
SZ		 1457 LIST_FOREACH(brt, &sc->sc_rtlists[mycpuid], brt_list) {
1458 struct bridge_rtinfo *bri = brt->brt_info;
1459 unsigned long expire;
1460
2d4d3c93
SZ		 1461 if (len < sizeof(*bareq))
1462 break;
1463
4394693c 1464 strlcpy(bareq->ifba_ifsname, bri->bri_ifp->if_xname,
2d4d3c93
SZ		 1465 sizeof(bareq->ifba_ifsname));
1466 memcpy(bareq->ifba_dst, brt->brt_addr, sizeof(brt->brt_addr));
4394693c
SZ		 1467 expire = bri->bri_expire;
1468 if ((bri->bri_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC &&
1469 time_second < expire)
1470 bareq->ifba_expire = expire - time_second;
ac93838f 1471 else
2d4d3c93 1472 bareq->ifba_expire = 0;
4394693c 1473 bareq->ifba_flags = bri->bri_flags;
2d4d3c93 1474 bareq++;
ac93838f 1475 count++;
2d4d3c93 1476 len -= sizeof(*bareq);
ac93838f 1477 }
2d4d3c93
SZ		 1478
1479 bac->ifbac_len = sizeof(*bareq) * count;
1480 KKASSERT(bac->ifbac_len > 0);
1481
1482 bc_arg->bca_len = bac->ifbac_len;
1483 bc_arg->bca_uptr = bac->ifbac_req;
1484 return 0;
ac93838f
SS		 1485}
1486
d217f5e5 1487static int
ac93838f
SS		 1488bridge_ioctl_saddr(struct bridge_softc *sc, void *arg)
1489{
1490 struct ifbareq *req = arg;
1491 struct bridge_iflist *bif;
4394693c 1492 struct ifnet *ifp = sc->sc_ifp;
ac93838f
SS		 1493 int error;
1494
2c9effcf 1495 ASSERT_IFNET_SERIALIZED_ALL(ifp);
4394693c 1496
ac93838f
SS		 1497 bif = bridge_lookup_member(sc, req->ifba_ifsname);
1498 if (bif == NULL)
1499 return (ENOENT);
1500
a3dd34d2 1501 ifnet_deserialize_all(ifp);
4394693c
SZ		 1502 error = bridge_rtsaddr(sc, req->ifba_dst, bif->bif_ifp,
1503 req->ifba_flags);
a3dd34d2 1504 ifnet_serialize_all(ifp);
ac93838f
SS		 1505 return (error);
1506}
1507
d217f5e5 1508static int
ac93838f
SS		 1509bridge_ioctl_sto(struct bridge_softc *sc, void *arg)
1510{
1511 struct ifbrparam *param = arg;
1512
1513 sc->sc_brttimeout = param->ifbrp_ctime;
1514
1515 return (0);
1516}
1517
d217f5e5 1518static int
ac93838f
SS		 1519bridge_ioctl_gto(struct bridge_softc *sc, void *arg)
1520{
1521 struct ifbrparam *param = arg;
1522
1523 param->ifbrp_ctime = sc->sc_brttimeout;
1524
1525 return (0);
1526}
1527
d217f5e5 1528static int
ac93838f
SS		 1529bridge_ioctl_daddr(struct bridge_softc *sc, void *arg)
1530{
1531 struct ifbareq *req = arg;
4394693c
SZ		 1532 struct ifnet *ifp = sc->sc_ifp;
1533 int error;
ac93838f 1534
a3dd34d2 1535 ifnet_deserialize_all(ifp);
4394693c 1536 error = bridge_rtdaddr(sc, req->ifba_dst);
a3dd34d2 1537 ifnet_serialize_all(ifp);
4394693c 1538 return error;
ac93838f
SS		 1539}
1540
d217f5e5 1541static int
ac93838f
SS		 1542bridge_ioctl_flush(struct bridge_softc *sc, void *arg)
1543{
1544 struct ifbreq *req = arg;
4394693c 1545 struct ifnet *ifp = sc->sc_ifp;
ac93838f 1546
a3dd34d2 1547 ifnet_deserialize_all(ifp);
30ced003 1548 bridge_rtflush(sc, req->ifbr_ifsflags | IFBF_FLUSHSYNC);
a3dd34d2 1549 ifnet_serialize_all(ifp);
ac93838f
SS		 1550
1551 return (0);
1552}
1553
d217f5e5 1554static int
ac93838f
SS		 1555bridge_ioctl_gpri(struct bridge_softc *sc, void *arg)
1556{
1557 struct ifbrparam *param = arg;
1558
1559 param->ifbrp_prio = sc->sc_bridge_priority;
1560
1561 return (0);
1562}
1563
d217f5e5 1564static int
ac93838f
SS		 1565bridge_ioctl_spri(struct bridge_softc *sc, void *arg)
1566{
1567 struct ifbrparam *param = arg;
1568
1569 sc->sc_bridge_priority = param->ifbrp_prio;
1570
1571 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1572 bstp_initialization(sc);
1573
1574 return (0);
1575}
1576
d217f5e5 1577static int
ac93838f
SS		 1578bridge_ioctl_ght(struct bridge_softc *sc, void *arg)
1579{
1580 struct ifbrparam *param = arg;
1581
1582 param->ifbrp_hellotime = sc->sc_bridge_hello_time >> 8;
1583
1584 return (0);
1585}
1586
d217f5e5 1587static int
ac93838f
SS		 1588bridge_ioctl_sht(struct bridge_softc *sc, void *arg)
1589{
1590 struct ifbrparam *param = arg;
1591
1592 if (param->ifbrp_hellotime == 0)
1593 return (EINVAL);
1594 sc->sc_bridge_hello_time = param->ifbrp_hellotime << 8;
1595
1596 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1597 bstp_initialization(sc);
1598
1599 return (0);
1600}
1601
d217f5e5 1602static int
ac93838f
SS		 1603bridge_ioctl_gfd(struct bridge_softc *sc, void *arg)
1604{
1605 struct ifbrparam *param = arg;
1606
1607 param->ifbrp_fwddelay = sc->sc_bridge_forward_delay >> 8;
1608
1609 return (0);
1610}
1611
d217f5e5 1612static int
ac93838f
SS		 1613bridge_ioctl_sfd(struct bridge_softc *sc, void *arg)
1614{
1615 struct ifbrparam *param = arg;
1616
1617 if (param->ifbrp_fwddelay == 0)
1618 return (EINVAL);
1619 sc->sc_bridge_forward_delay = param->ifbrp_fwddelay << 8;
1620
1621 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1622 bstp_initialization(sc);
1623
1624 return (0);
1625}
1626
d217f5e5 1627static int
ac93838f
SS		 1628bridge_ioctl_gma(struct bridge_softc *sc, void *arg)
1629{
1630 struct ifbrparam *param = arg;
1631
1632 param->ifbrp_maxage = sc->sc_bridge_max_age >> 8;
1633
1634 return (0);
1635}
1636
d217f5e5 1637static int
ac93838f
SS		 1638bridge_ioctl_sma(struct bridge_softc *sc, void *arg)
1639{
1640 struct ifbrparam *param = arg;
1641
1642 if (param->ifbrp_maxage == 0)
1643 return (EINVAL);
1644 sc->sc_bridge_max_age = param->ifbrp_maxage << 8;
1645
1646 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1647 bstp_initialization(sc);
1648
1649 return (0);
1650}
1651
d217f5e5 1652static int
ac93838f
SS		 1653bridge_ioctl_sifprio(struct bridge_softc *sc, void *arg)
1654{
1655 struct ifbreq *req = arg;
1656 struct bridge_iflist *bif;
1657
1658 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1659 if (bif == NULL)
1660 return (ENOENT);
1661
1662 bif->bif_priority = req->ifbr_priority;
1663
1664 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1665 bstp_initialization(sc);
1666
1667 return (0);
1668}
1669
d217f5e5 1670static int
ac93838f
SS		 1671bridge_ioctl_sifcost(struct bridge_softc *sc, void *arg)
1672{
1673 struct ifbreq *req = arg;
1674 struct bridge_iflist *bif;
1675
1676 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1677 if (bif == NULL)
1678 return (ENOENT);
1679
1680 bif->bif_path_cost = req->ifbr_path_cost;
1681
1682 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1683 bstp_initialization(sc);
1684
1685 return (0);
1686}
1687
d217f5e5
SU		 1688static int
1689bridge_ioctl_addspan(struct bridge_softc *sc, void *arg)
1690{
1691 struct ifbreq *req = arg;
8f7b13ef 1692 struct bridge_iflist *bif;
d217f5e5 1693 struct ifnet *ifs;
70d9a675 1694 struct bridge_ifinfo *bif_info;
d217f5e5
SU		 1695
1696 ifs = ifunit(req->ifbr_ifsname);
1697 if (ifs == NULL)
1698 return (ENOENT);
1699
70d9a675 1700 TAILQ_FOREACH(bif, &sc->sc_spanlist, bif_next)
d217f5e5
SU		 1701 if (ifs == bif->bif_ifp)
1702 return (EBUSY);
1703
1704 if (ifs->if_bridge != NULL)
1705 return (EBUSY);
1706
1707 switch (ifs->if_type) {
d76dd5c7
SZ		 1708 case IFT_ETHER:
1709 case IFT_GIF:
1710 case IFT_L2VLAN:
1711 break;
1712
1713 default:
1714 return (EINVAL);
d217f5e5
SU		 1715 }
1716
70d9a675
MD		 1717 /*
1718 * bif_info is needed for bif_flags
1719 */
1720 bif_info = kmalloc(sizeof(*bif_info), M_DEVBUF, M_WAITOK | M_ZERO);
1721 bif_info->bifi_ifp = ifs;
1722
8f7b13ef 1723 bif = kmalloc(sizeof(*bif), M_DEVBUF, M_WAITOK | M_ZERO);
d217f5e5 1724 bif->bif_ifp = ifs;
70d9a675 1725 bif->bif_info = bif_info;
d217f5e5 1726 bif->bif_flags = IFBIF_SPAN;
8f7b13ef 1727 /* NOTE: span bif does not need bridge_ifinfo */
d217f5e5 1728
70d9a675 1729 TAILQ_INSERT_HEAD(&sc->sc_spanlist, bif, bif_next);
d217f5e5 1730
d895303b
SZ		 1731 sc->sc_span = 1;
1732
d217f5e5
SU		 1733 return (0);
1734}
1735
1736static int
1737bridge_ioctl_delspan(struct bridge_softc *sc, void *arg)
1738{
1739 struct ifbreq *req = arg;
1740 struct bridge_iflist *bif;
1741 struct ifnet *ifs;
1742
1743 ifs = ifunit(req->ifbr_ifsname);
1744 if (ifs == NULL)
1745 return (ENOENT);
1746
70d9a675 1747 TAILQ_FOREACH(bif, &sc->sc_spanlist, bif_next)
d217f5e5
SU		 1748 if (ifs == bif->bif_ifp)
1749 break;
1750
1751 if (bif == NULL)
1752 return (ENOENT);
1753
1754 bridge_delete_span(sc, bif);
1755
70d9a675 1756 if (TAILQ_EMPTY(&sc->sc_spanlist))
d895303b
SZ		 1757 sc->sc_span = 0;
1758
d217f5e5
SU		 1759 return (0);
1760}
1761
d217f5e5 1762static void
002c1265 1763bridge_ifdetach_dispatch(netmsg_t msg)
ac93838f 1764{
ac308789
SZ		 1765 struct ifnet *ifp, *bifp;
1766 struct bridge_softc *sc;
d217f5e5 1767 struct bridge_iflist *bif;
ac308789 1768
002c1265 1769 ifp = msg->lmsg.u.ms_resultp;
ac308789 1770 sc = ifp->if_bridge;
ac93838f 1771
d217f5e5
SU		 1772 /* Check if the interface is a bridge member */
1773 if (sc != NULL) {
bdfc79d0
SZ		 1774 bifp = sc->sc_ifp;
1775
a3dd34d2 1776 ifnet_serialize_all(bifp);
ac93838f 1777
d217f5e5 1778 bif = bridge_lookup_member_if(sc, ifp);
ac308789 1779 if (bif != NULL) {
d217f5e5 1780 bridge_delete_member(sc, bif, 1);
ac308789
SZ		 1781 } else {
1782 /* XXX Why bif will be NULL? */
1783 }
d217f5e5 1784
a3dd34d2 1785 ifnet_deserialize_all(bifp);
ac308789 1786 goto reply;
d217f5e5
SU		 1787 }
1788
ac308789
SZ		 1789 crit_enter(); /* XXX MP */
1790
d217f5e5
SU		 1791 /* Check if the interface is a span port */
1792 LIST_FOREACH(sc, &bridge_list, sc_list) {
bdfc79d0
SZ		 1793 bifp = sc->sc_ifp;
1794
a3dd34d2 1795 ifnet_serialize_all(bifp);
bdfc79d0 1796
70d9a675 1797 TAILQ_FOREACH(bif, &sc->sc_spanlist, bif_next)
d217f5e5
SU		 1798 if (ifp == bif->bif_ifp) {
1799 bridge_delete_span(sc, bif);
1800 break;
1801 }
bdfc79d0 1802
a3dd34d2 1803 ifnet_deserialize_all(bifp);
d217f5e5 1804 }
ac308789
SZ		 1805
1806 crit_exit();
1807
1808reply:
002c1265 1809 lwkt_replymsg(&msg->lmsg, 0);
ac308789
SZ		 1810}
1811
1812/*
1813 * bridge_ifdetach:
1814 *
1815 * Detach an interface from a bridge. Called when a member
1816 * interface is detaching.
1817 */
1818static void
1819bridge_ifdetach(void *arg __unused, struct ifnet *ifp)
1820{
002c1265 1821 struct netmsg_base msg;
ac308789 1822
002c1265 1823 netmsg_init(&msg, NULL, &curthread->td_msgport,
48e7b118 1824 0, bridge_ifdetach_dispatch);
002c1265 1825 msg.lmsg.u.ms_resultp = ifp;
ac308789 1826
002c1265 1827 lwkt_domsg(BRIDGE_CFGPORT, &msg.lmsg, 0);
ac93838f
SS		 1828}
1829
1830/*
1831 * bridge_init:
1832 *
1833 * Initialize a bridge interface.
1834 */
1835static void
1836bridge_init(void *xsc)
1837{
d71129d9 1838 bridge_control(xsc, SIOCSIFFLAGS, bridge_ioctl_init, NULL);
ac93838f
SS		 1839}
1840
1841/*
1842 * bridge_stop:
1843 *
1844 * Stop the bridge interface.
1845 */
d217f5e5 1846static void
867cc45a 1847bridge_stop(struct ifnet *ifp)
ac93838f 1848{
d71129d9 1849 bridge_control(ifp->if_softc, SIOCSIFFLAGS, bridge_ioctl_stop, NULL);
ac93838f
SS		 1850}
1851
ecd27a4c 1852/*
70d9a675
MD		 1853 * Returns TRUE if the packet is being sent 'from us'... from our bridge
1854 * interface or from any member of our bridge interface. This is used
1855 * later on to force the MAC to be the MAC of our bridge interface.
1856 */
1857static int
1858bridge_from_us(struct bridge_softc *sc, struct ether_header *eh)
1859{
1860 struct bridge_iflist *bif;
1861
1862 if (memcmp(eh->ether_shost, IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN) == 0)
1863 return (1);
1864
1865 TAILQ_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next) {
1866 if (memcmp(eh->ether_shost, IF_LLADDR(bif->bif_ifp),
1867 ETHER_ADDR_LEN) == 0) {
1868 return (1);
1869 }
1870 }
1871 return (0);
1872}
1873
1874/*
ecd27a4c
SZ		 1875 * bridge_enqueue:
1876 *
1877 * Enqueue a packet on a bridge member interface.
1878 *
1879 */
1880void
1881bridge_enqueue(struct ifnet *dst_ifp, struct mbuf *m)
1882{
137aa7b3 1883 struct netmsg_packet *nmp;
137aa7b3
SZ		 1884
1885 nmp = &m->m_hdr.mh_netmsg;
002c1265 1886 netmsg_init(&nmp->base, NULL, &netisr_apanic_rport,
48e7b118 1887 0, bridge_enqueue_handler);
137aa7b3 1888 nmp->nm_packet = m;
002c1265 1889 nmp->base.lmsg.u.ms_resultp = dst_ifp;
137aa7b3 1890
002c1265 1891 lwkt_sendmsg(ifnet_portfn(mycpu->gd_cpuid), &nmp->base.lmsg);
ac93838f
SS		 1892}
1893
1894/*
e1d2145d 1895 * bridge_output:
ac93838f
SS		 1896 *
1897 * Send output from a bridge member interface. This
1898 * performs the bridging function for locally originated
1899 * packets.
1900 *
1901 * The mbuf has the Ethernet header already attached. We must
1902 * enqueue or free the mbuf before returning.
1903 */
a18eb4b7 1904static int
eb366364 1905bridge_output(struct ifnet *ifp, struct mbuf *m)
ac93838f 1906{
89ea766d 1907 struct bridge_softc *sc = ifp->if_bridge;
3677aae9 1908 struct bridge_iflist *bif, *nbif;
ac93838f 1909 struct ether_header *eh;
137aa7b3 1910 struct ifnet *dst_if, *bifp;
4ee4f753 1911 int from_us;
70d9a675 1912 int priority;
ac93838f 1913
2c9effcf 1914 ASSERT_IFNET_NOT_SERIALIZED_ALL(ifp);
ac93838f 1915
89ea766d
SZ		 1916 /*
1917 * Make sure that we are still a member of a bridge interface.
1918 */
1919 if (sc == NULL) {
1920 m_freem(m);
1921 return (0);
1922 }
137aa7b3 1923 bifp = sc->sc_ifp;
89ea766d 1924
70d9a675
MD		 1925 /*
1926 * Acquire header
1927 */
ac93838f
SS		 1928 if (m->m_len < ETHER_HDR_LEN) {
1929 m = m_pullup(m, ETHER_HDR_LEN);
70d9a675
MD		 1930 if (m == NULL) {
1931 bifp->if_oerrors++;
ac93838f 1932 return (0);
70d9a675 1933 }
ac93838f 1934 }
ac93838f 1935 eh = mtod(m, struct ether_header *);
70d9a675 1936 from_us = bridge_from_us(sc, eh);
be02a6a0
MD		 1937
1938 /*
ac93838f
SS		 1939 * If bridge is down, but the original output interface is up,
1940 * go ahead and send out that interface. Otherwise, the packet
1941 * is dropped below.
1942 */
137aa7b3 1943 if ((bifp->if_flags & IFF_RUNNING) == 0) {
ac93838f
SS		 1944 dst_if = ifp;
1945 goto sendunicast;
1946 }
1947
1948 /*
1949 * If the packet is a multicast, or we don't know a better way to
1950 * get there, send to all interfaces.
1951 */
1952 if (ETHER_IS_MULTICAST(eh->ether_dhost))
1953 dst_if = NULL;
1954 else
1955 dst_if = bridge_rtlookup(sc, eh->ether_dhost);
70d9a675 1956
ac93838f 1957 if (dst_if == NULL) {
ac93838f
SS		 1958 struct mbuf *mc;
1959 int used = 0;
1960
d895303b
SZ		 1961 if (sc->sc_span)
1962 bridge_span(sc, m);
d217f5e5 1963
70d9a675 1964 TAILQ_FOREACH_MUTABLE(bif, &sc->sc_iflists[mycpuid],
137aa7b3 1965 bif_next, nbif) {
ac93838f
SS		 1966 dst_if = bif->bif_ifp;
1967 if ((dst_if->if_flags & IFF_RUNNING) == 0)
1968 continue;
1969
1970 /*
1971 * If this is not the original output interface,
1972 * and the interface is participating in spanning
1973 * tree, make sure the port is in a state that
1974 * allows forwarding.
1975 */
1976 if (dst_if != ifp &&
1977 (bif->bif_flags & IFBIF_STP) != 0) {
1978 switch (bif->bif_state) {
3677aae9 1979 case BSTP_IFSTATE_L1BLOCKING:
ac93838f
SS		 1980 case BSTP_IFSTATE_BLOCKING:
1981 case BSTP_IFSTATE_LISTENING:
1982 case BSTP_IFSTATE_DISABLED:
1983 continue;
1984 }
1985 }
1986
70d9a675 1987 if (TAILQ_NEXT(bif, bif_next) == NULL) {
ac93838f
SS		 1988 used = 1;
1989 mc = m;
1990 } else {
1991 mc = m_copypacket(m, MB_DONTWAIT);
1992 if (mc == NULL) {
137aa7b3 1993 bifp->if_oerrors++;
ac93838f
SS		 1994 continue;
1995 }
1996 }
4ee4f753
MD		 1997
1998 /*
1999 * If the packet is 'from' us override ether_shost.
2000 */
70d9a675 2001 bridge_handoff(sc, dst_if, mc, from_us);
137aa7b3
SZ		 2002
2003 if (nbif != NULL && !nbif->bif_onlist) {
2004 KKASSERT(bif->bif_onlist);
70d9a675 2005 nbif = TAILQ_NEXT(bif, bif_next);
137aa7b3 2006 }
ac93838f
SS		 2007 }
2008 if (used == 0)
2009 m_freem(m);
ad8c8b44 2010 return (0);
ac93838f
SS		 2011 }
2012
d217f5e5 2013sendunicast:
ac93838f 2014 /*
70d9a675
MD		 2015 * If STP is enabled on the target we are an equal opportunity
2016 * employer and do not necessarily output to dst_if. Instead
2017 * scan available links with the same MAC as the current dst_if
2018 * and choose the best one.
3677aae9 2019 *
70d9a675 2020 * We also need to do this because arp entries tag onto a particular
3677aae9
MD		 2021 * interface and if it happens to be dead then the packets will
2022 * go into a bit bucket.
70d9a675
MD		 2023 *
2024 * If LINK2 is set the matching links are bonded and we-round robin.
2025 * (the MAC address must be the same for the participating links).
2026 * In this case links in a STP BLOCKING state are allowed for unicast
2027 * packets.
ac93838f 2028 */
3677aae9
MD		 2029 bif = bridge_lookup_member_if(sc, dst_if);
2030 if (bif->bif_flags & IFBIF_STP) {
70d9a675
MD		 2031 priority = 0;
2032 TAILQ_FOREACH_MUTABLE(bif, &sc->sc_iflists[mycpuid],
2033 bif_next, nbif) {
2034 if (memcmp(IF_LLADDR(bif->bif_ifp),
2035 IF_LLADDR(dst_if),
2036 ETHER_ADDR_LEN) != 0) {
2037 continue;
2038 }
2039
2040 switch(bif->bif_state) {
2041 case BSTP_IFSTATE_BLOCKING:
2042 if (sc->sc_ifp->if_flags & IFF_LINK2)
2043 break;
2044 /* fall through */
2045 case BSTP_IFSTATE_L1BLOCKING:
2046 case BSTP_IFSTATE_LISTENING:
2047 case BSTP_IFSTATE_DISABLED:
2048 continue;
2049 default:
2050 break;
2051 }
2052 if ((bif->bif_ifp->if_flags & IFF_RUNNING) == 0)
2053 continue;
2054
2055 /*
2056 * XXX we need to use the toepliz hash or
2057 * something like that instead of
2058 * round-robining.
2059 */
2060 if (sc->sc_ifp->if_flags & IFF_LINK2) {
3677aae9 2061 dst_if = bif->bif_ifp;
70d9a675
MD		 2062 TAILQ_REMOVE(&sc->sc_iflists[mycpuid],
2063 bif, bif_next);
2064 TAILQ_INSERT_TAIL(
2065 &sc->sc_iflists[mycpuid],
2066 bif, bif_next);
3677aae9
MD		 2067 break;
2068 }
70d9a675
MD		 2069 if (bif->bif_priority > priority) {
2070 priority = bif->bif_priority;
2071 dst_if = bif->bif_ifp;
2072 }
3677aae9
MD		 2073 }
2074 }
2075
d895303b
SZ		 2076 if (sc->sc_span)
2077 bridge_span(sc, m);
ad8c8b44 2078 if ((dst_if->if_flags & IFF_RUNNING) == 0)
ac93838f 2079 m_freem(m);
ad8c8b44 2080 else
70d9a675 2081 bridge_handoff(sc, dst_if, m, from_us);
ac93838f
SS		 2082 return (0);
2083}
2084
2085/*
70d9a675
MD		 2086 * Returns the bridge interface associated with an ifc.
2087 * Pass ifp->if_bridge (must not be NULL). Used by the ARP
2088 * code to supply the bridge for the is-at info, making
2089 * the bridge responsible for matching local addresses.
2090 *
2091 * Without this the ARP code will supply bridge member interfaces
2092 * for the is-at which makes it difficult the bridge to fail-over
2093 * interfaces (amoung other things).
2094 */
2095static struct ifnet *
2096bridge_interface(void *if_bridge)
2097{
2098 struct bridge_softc *sc = if_bridge;
2099 return (sc->sc_ifp);
2100}
2101
2102/*
ac93838f
SS		 2103 * bridge_start:
2104 *
2105 * Start output on a bridge.
ac93838f 2106 */
d217f5e5 2107static void
ac93838f
SS		 2108bridge_start(struct ifnet *ifp)
2109{
867cc45a 2110 struct bridge_softc *sc = ifp->if_softc;
ac93838f 2111
2c9effcf 2112 ASSERT_IFNET_SERIALIZED_TX(ifp);
ac93838f
SS		 2113
2114 ifp->if_flags |= IFF_OACTIVE;
2115 for (;;) {
867cc45a
SZ		 2116 struct ifnet *dst_if = NULL;
2117 struct ether_header *eh;
2118 struct mbuf *m;
2119
ac93838f 2120 m = ifq_dequeue(&ifp->if_snd, NULL);
867cc45a 2121 if (m == NULL)
ac93838f 2122 break;
ac93838f 2123
867cc45a
SZ		 2124 if (m->m_len < sizeof(*eh)) {
2125 m = m_pullup(m, sizeof(*eh));
2126 if (m == NULL) {
2127 ifp->if_oerrors++;
2128 continue;
2129 }
2130 }
ac93838f 2131 eh = mtod(m, struct ether_header *);
ac93838f 2132
867cc45a
SZ		 2133 BPF_MTAP(ifp, m);
2134 ifp->if_opackets++;
2135
2136 if ((m->m_flags & (M_BCAST|M_MCAST)) == 0)
ac93838f 2137 dst_if = bridge_rtlookup(sc, eh->ether_dhost);
ac93838f
SS		 2138
2139 if (dst_if == NULL)
137aa7b3 2140 bridge_start_bcast(sc, m);
ac93838f 2141 else
708a3bfa 2142 bridge_enqueue(dst_if, m);
ac93838f
SS		 2143 }
2144 ifp->if_flags &= ~IFF_OACTIVE;
ac93838f
SS		 2145}
2146
2147/*
2148 * bridge_forward:
2149 *
4ee4f753
MD		 2150 * Forward packets received on a bridge interface via the input
2151 * path.
2152 *
ac93838f
SS		 2153 * The forwarding function of the bridge.
2154 */
d217f5e5 2155static void
ac93838f
SS		 2156bridge_forward(struct bridge_softc *sc, struct mbuf *m)
2157{
70d9a675 2158 struct bridge_iflist *bif, *nbif;
ac93838f
SS		 2159 struct ifnet *src_if, *dst_if, *ifp;
2160 struct ether_header *eh;
70d9a675 2161 int priority;
ac93838f
SS		 2162
2163 src_if = m->m_pkthdr.rcvif;
2164 ifp = sc->sc_ifp;
2165
2c9effcf 2166 ASSERT_IFNET_NOT_SERIALIZED_ALL(ifp);
ac93838f 2167
ecd27a4c
SZ		 2168 ifp->if_ipackets++;
2169 ifp->if_ibytes += m->m_pkthdr.len;
ac93838f
SS		 2170
2171 /*
2172 * Look up the bridge_iflist.
2173 */
2174 bif = bridge_lookup_member_if(sc, src_if);
2175 if (bif == NULL) {
2176 /* Interface is not a bridge member (anymore?) */
2177 m_freem(m);
2178 return;
2179 }
2180
2181 if (bif->bif_flags & IFBIF_STP) {
2182 switch (bif->bif_state) {
2183 case BSTP_IFSTATE_BLOCKING:
70d9a675
MD		 2184 if ((sc->sc_ifp->if_flags & IFF_LINK2) &&
2185 (m->m_flags & (M_BCAST|M_MCAST)) == 0) {
2186 break;
2187 }
2188 /* fall through */
2189 case BSTP_IFSTATE_L1BLOCKING:
ac93838f
SS		 2190 case BSTP_IFSTATE_LISTENING:
2191 case BSTP_IFSTATE_DISABLED:
2192 m_freem(m);
2193 return;
70d9a675
MD		 2194 default:
2195 break;
ac93838f
SS		 2196 }
2197 }
2198
2199 eh = mtod(m, struct ether_header *);
2200
2201 /*
2202 * If the interface is learning, and the source
2203 * address is valid and not multicast, record
2204 * the address.
2205 */
2206 if ((bif->bif_flags & IFBIF_LEARNING) != 0 &&
70d9a675 2207 bif->bif_state != BSTP_IFSTATE_BLOCKING &&
ac93838f
SS		 2208 ETHER_IS_MULTICAST(eh->ether_shost) == 0 &&
2209 (eh->ether_shost[0] == 0 &&
2210 eh->ether_shost[1] == 0 &&
2211 eh->ether_shost[2] == 0 &&
2212 eh->ether_shost[3] == 0 &&
2213 eh->ether_shost[4] == 0 &&
70d9a675 2214 eh->ether_shost[5] == 0) == 0) {
4394693c 2215 bridge_rtupdate(sc, eh->ether_shost, src_if, IFBAF_DYNAMIC);
70d9a675 2216 }
ac93838f
SS		 2217
2218 if ((bif->bif_flags & IFBIF_STP) != 0 &&
2219 bif->bif_state == BSTP_IFSTATE_LEARNING) {
2220 m_freem(m);
ecd27a4c 2221 return;
ac93838f
SS		 2222 }
2223
2224 /*
2225 * At this point, the port either doesn't participate
2226 * in spanning tree or it is in the forwarding state.
2227 */
2228
2229 /*
2230 * If the packet is unicast, destined for someone on
2231 * "this" side of the bridge, drop it.
2232 */
2233 if ((m->m_flags & (M_BCAST|M_MCAST)) == 0) {
2234 dst_if = bridge_rtlookup(sc, eh->ether_dhost);
2235 if (src_if == dst_if) {
2236 m_freem(m);
ecd27a4c 2237 return;
ac93838f
SS		 2238 }
2239 } else {
2240 /* ...forward it to all interfaces. */
137aa7b3 2241 ifp->if_imcasts++;
ac93838f
SS		 2242 dst_if = NULL;
2243 }
2244
ac93838f 2245 if (dst_if == NULL) {
137aa7b3 2246 bridge_broadcast(sc, src_if, m);
ecd27a4c 2247 return;
ac93838f
SS		 2248 }
2249
2250 /*
70d9a675 2251 * Unicast, kinda replicates the output side of bridge_output().
ac93838f 2252 */
ac93838f
SS		 2253 bif = bridge_lookup_member_if(sc, dst_if);
2254 if (bif == NULL) {
2255 /* Not a member of the bridge (anymore?) */
2256 m_freem(m);
ecd27a4c 2257 return;
ac93838f
SS		 2258 }
2259
2260 if (bif->bif_flags & IFBIF_STP) {
70d9a675
MD		 2261 priority = 0;
2262 TAILQ_FOREACH_MUTABLE(bif, &sc->sc_iflists[mycpuid],
2263 bif_next, nbif) {
2264 if (memcmp(IF_LLADDR(bif->bif_ifp),
2265 IF_LLADDR(dst_if),
2266 ETHER_ADDR_LEN) != 0) {
2267 continue;
2268 }
2269
2270 switch(bif->bif_state) {
2271 case BSTP_IFSTATE_BLOCKING:
2272 if (sc->sc_ifp->if_flags & IFF_LINK2)
2273 break;
2274 /* fall through */
2275 case BSTP_IFSTATE_L1BLOCKING:
2276 case BSTP_IFSTATE_LISTENING:
2277 case BSTP_IFSTATE_DISABLED:
2278 continue;
2279 default:
2280 break;
2281 }
2282
2283 if ((bif->bif_ifp->if_flags & IFF_RUNNING) == 0)
2284 continue;
2285
2286 /*
2287 * XXX we need to use the toepliz hash or
2288 * something like that instead of
2289 * round-robining.
2290 */
2291 if (sc->sc_ifp->if_flags & IFF_LINK2) {
2292 dst_if = bif->bif_ifp;
2293 TAILQ_REMOVE(&sc->sc_iflists[mycpuid],
2294 bif, bif_next);
2295 TAILQ_INSERT_TAIL(
2296 &sc->sc_iflists[mycpuid],
2297 bif, bif_next);
2298 break;
2299 }
2300 if (bif->bif_priority > priority) {
2301 priority = bif->bif_priority;
2302 dst_if = bif->bif_ifp;
2303 }
ac93838f
SS		 2304 }
2305 }
2306
70d9a675
MD		 2307 /*
2308 * At this point, we're dealing with a unicast frame
2309 * going to a different interface.
2310 */
2311 if ((dst_if->if_flags & IFF_RUNNING) == 0) {
2312 m_freem(m);
2313 return;
2314 }
2315
ac93838f
SS		 2316 if (inet_pfil_hook.ph_hashooks > 0
2317#ifdef INET6
2318 || inet6_pfil_hook.ph_hashooks > 0
2319#endif
2320 ) {
ecd27a4c 2321 if (bridge_pfil(&m, ifp, src_if, PFIL_IN) != 0)
137aa7b3 2322 return;
ecd27a4c 2323 if (m == NULL)
137aa7b3 2324 return;
ecd27a4c
SZ		 2325
2326 if (bridge_pfil(&m, ifp, dst_if, PFIL_OUT) != 0)
137aa7b3 2327 return;
ac93838f 2328 if (m == NULL)
137aa7b3 2329 return;
ac93838f 2330 }
70d9a675 2331 bridge_handoff(sc, dst_if, m, 0);
ac93838f
SS		 2332}
2333
2334/*
2335 * bridge_input:
2336 *
2337 * Receive input from a member interface. Queue the packet for
2338 * bridging if it is not for us.
2339 */
a18eb4b7 2340static struct mbuf *
ac93838f
SS		 2341bridge_input(struct ifnet *ifp, struct mbuf *m)
2342{
2343 struct bridge_softc *sc = ifp->if_bridge;
2344 struct bridge_iflist *bif;
3ce67233 2345 struct ifnet *bifp, *new_ifp;
ac93838f
SS		 2346 struct ether_header *eh;
2347 struct mbuf *mc, *mc2;
2348
2c9effcf 2349 ASSERT_IFNET_NOT_SERIALIZED_ALL(ifp);
137aa7b3 2350
89ea766d
SZ		 2351 /*
2352 * Make sure that we are still a member of a bridge interface.
2353 */
2354 if (sc == NULL)
2355 return m;
2356
3ce67233 2357 new_ifp = NULL;
ac93838f 2358 bifp = sc->sc_ifp;
3ce67233 2359
ac91a939 2360 if ((bifp->if_flags & IFF_RUNNING) == 0)
ac93838f
SS		 2361 goto out;
2362
3a593c54 2363 /*
0f6ada01 2364 * Implement support for bridge monitoring. If this flag has been
3a593c54 2365 * set on this interface, discard the packet once we push it through
0f6ada01
SZ		 2366 * the bpf(4) machinery, but before we do, increment various counters
2367 * associated with this bridge.
3a593c54 2368 */
0f6ada01
SZ		 2369 if (bifp->if_flags & IFF_MONITOR) {
2370 /* Change input interface to this bridge */
2371 m->m_pkthdr.rcvif = bifp;
2372
3a593c54 2373 BPF_MTAP(bifp, m);
0f6ada01
SZ		 2374
2375 /* Update bridge's ifnet statistics */
3a593c54
MD		 2376 bifp->if_ipackets++;
2377 bifp->if_ibytes += m->m_pkthdr.len;
0f6ada01
SZ		 2378 if (m->m_flags & (M_MCAST | M_BCAST))
2379 bifp->if_imcasts++;
2380
3a593c54 2381 m_freem(m);
ac91a939 2382 m = NULL;
3a593c54
MD		 2383 goto out;
2384 }
2385
be02a6a0
MD		 2386 /*
2387 * Handle the ether_header
b7441d0c
MD		 2388 *
2389 * In all cases if the packet is destined for us via our MAC
2390 * we must clear BRIDGE_MBUF_TAGGED to ensure that we don't
2391 * repeat the source MAC out the same interface.
70d9a675
MD		 2392 *
2393 * This first test against our bridge MAC is the fast-path.
2394 *
2395 * NOTE! The bridge interface can serve as an endpoint for
2396 * communication but normally there are no IPs associated
2397 * with it so you cannot route through it. Instead what
2398 * you do is point your default route *THROUGH* the bridge
2399 * to the actual default router for one of the bridged spaces.
2400 *
2401 * Another possibility is to put all your IP specifications
2402 * on the bridge instead of on the individual interfaces. If
2403 * you do this it should be possible to use the bridge as an
2404 * end point and route (rather than switch) through it using
2405 * the default route or ipfw forwarding rules.
be02a6a0 2406 */
70d9a675
MD		 2407
2408 /*
2409 * Acquire header
2410 */
2411 if (m->m_len < ETHER_HDR_LEN) {
2412 m = m_pullup(m, ETHER_HDR_LEN);
2413 if (m == NULL)
2414 goto out;
2415 }
ac93838f 2416 eh = mtod(m, struct ether_header *);
be02a6a0
MD		 2417 m->m_pkthdr.fw_flags |= BRIDGE_MBUF_TAGGED;
2418 bcopy(eh, &m->m_pkthdr.br.ether, sizeof(*eh));
ac93838f 2419
70d9a675
MD		 2420 if ((bridge_debug & 1) &&
2421 (ntohs(eh->ether_type) == ETHERTYPE_ARP ||
2422 ntohs(eh->ether_type) == ETHERTYPE_REVARP)) {
2423 kprintf("%02x:%02x:%02x:%02x:%02x:%02x "
2424 "%02x:%02x:%02x:%02x:%02x:%02x type %04x "
2425 "lla %02x:%02x:%02x:%02x:%02x:%02x\n",
2426 eh->ether_dhost[0],
2427 eh->ether_dhost[1],
2428 eh->ether_dhost[2],
2429 eh->ether_dhost[3],
2430 eh->ether_dhost[4],
2431 eh->ether_dhost[5],
2432 eh->ether_shost[0],
2433 eh->ether_shost[1],
2434 eh->ether_shost[2],
2435 eh->ether_shost[3],
2436 eh->ether_shost[4],
2437 eh->ether_shost[5],
2438 eh->ether_type,
2439 ((u_char *)IF_LLADDR(bifp))[0],
2440 ((u_char *)IF_LLADDR(bifp))[1],
2441 ((u_char *)IF_LLADDR(bifp))[2],
2442 ((u_char *)IF_LLADDR(bifp))[3],
2443 ((u_char *)IF_LLADDR(bifp))[4],
2444 ((u_char *)IF_LLADDR(bifp))[5]
2445 );
2446 }
2447
3ce67233 2448 if (memcmp(eh->ether_dhost, IF_LLADDR(bifp), ETHER_ADDR_LEN) == 0) {
ac93838f
SS		 2449 /*
2450 * If the packet is for us, set the packets source as the
3ce67233 2451 * bridge, and return the packet back to ifnet.if_input for
ac93838f
SS		 2452 * local processing.
2453 */
b7441d0c 2454 m->m_pkthdr.fw_flags &= ~BRIDGE_MBUF_TAGGED;
3ce67233
SZ		 2455 KASSERT(bifp->if_bridge == NULL,
2456 ("loop created in bridge_input"));
02b0fa02
MD		 2457 if (pfil_member != 0) {
2458 if (inet_pfil_hook.ph_hashooks > 0
2459#ifdef INET6
2460 || inet6_pfil_hook.ph_hashooks > 0
2461#endif
2462 ) {
2463 if (bridge_pfil(&m, NULL, ifp, PFIL_IN) != 0)
2464 goto out;
2465 if (m == NULL)
2466 goto out;
2467 }
2468 }
3ce67233
SZ		 2469 new_ifp = bifp;
2470 goto out;
2471 }
ac93838f 2472
3ce67233
SZ		 2473 /*
2474 * Tap all packets arriving on the bridge, no matter if
2475 * they are local destinations or not. In is in.
2476 */
2477 BPF_MTAP(bifp, m);
ac93838f 2478
3ce67233
SZ		 2479 bif = bridge_lookup_member_if(sc, ifp);
2480 if (bif == NULL)
ac93838f 2481 goto out;
ac93838f 2482
d895303b
SZ		 2483 if (sc->sc_span)
2484 bridge_span(sc, m);
d217f5e5 2485
f581b688 2486 if (m->m_flags & (M_BCAST | M_MCAST)) {
70d9a675
MD		 2487 /*
2488 * Tap off 802.1D packets; they do not get forwarded.
2489 */
ac93838f 2490 if (memcmp(eh->ether_dhost, bstp_etheraddr,
3677aae9 2491 ETHER_ADDR_LEN) == 0) {
a3dd34d2 2492 ifnet_serialize_all(bifp);
b2417333 2493 bstp_input(sc, bif, m);
a3dd34d2 2494 ifnet_deserialize_all(bifp);
137aa7b3 2495
b2417333
SZ		 2496 /* m is freed by bstp_input */
2497 m = NULL;
f2c22bba 2498 goto out;
ac93838f
SS		 2499 }
2500
70d9a675
MD		 2501 /*
2502 * Other than 802.11d packets, ignore packets if the
2503 * interface is not in a good state.
2504 */
ac93838f
SS		 2505 if (bif->bif_flags & IFBIF_STP) {
2506 switch (bif->bif_state) {
3677aae9 2507 case BSTP_IFSTATE_L1BLOCKING:
ac93838f
SS		 2508 case BSTP_IFSTATE_BLOCKING:
2509 case BSTP_IFSTATE_LISTENING:
2510 case BSTP_IFSTATE_DISABLED:
2511 goto out;
2512 }
2513 }
2514
ac93838f
SS		 2515 /*
2516 * Make a deep copy of the packet and enqueue the copy
2517 * for bridge processing; return the original packet for
2518 * local processing.
2519 */
2520 mc = m_dup(m, MB_DONTWAIT);
2521 if (mc == NULL)
2522 goto out;
2523
2524 bridge_forward(sc, mc);
2525
2526 /*
2527 * Reinject the mbuf as arriving on the bridge so we have a
2528 * chance at claiming multicast packets. We can not loop back
2529 * here from ether_input as a bridge is never a member of a
2530 * bridge.
2531 */
2532 KASSERT(bifp->if_bridge == NULL,
3ce67233 2533 ("loop created in bridge_input"));
d217f5e5
SU		 2534 mc2 = m_dup(m, MB_DONTWAIT);
2535#ifdef notyet
2536 if (mc2 != NULL) {
2537 /* Keep the layer3 header aligned */
2538 int i = min(mc2->m_pkthdr.len, max_protohdr);
2539 mc2 = m_copyup(mc2, i, ETHER_ALIGN);
2540 }
2541#endif
ac93838f 2542 if (mc2 != NULL) {
137aa7b3 2543 /*
4ee4f753
MD		 2544 * Don't tap to bpf(4) again; we have already done
2545 * the tapping.
2546 *
2547 * Leave m_pkthdr.rcvif alone, so ARP replies are
2548 * processed as coming in on the correct interface.
b7441d0c
MD		 2549 *
2550 * Clear the bridge flag for local processing in
2551 * case the packet gets routed.
137aa7b3 2552 */
b7441d0c 2553 mc2->m_pkthdr.fw_flags &= ~BRIDGE_MBUF_TAGGED;
70d9a675 2554 ether_reinput_oncpu(bifp, mc2, 0);
ac93838f
SS		 2555 }
2556
2557 /* Return the original packet for local processing. */
2558 goto out;
2559 }
2560
70d9a675
MD		 2561 /*
2562 * Input of a unicast packet. We have to allow unicast packets
2563 * input from links in the BLOCKING state.
2564 *
2565 * NOTE: We explicitly ignore normal packets received on a link
2566 * in the BLOCKING state. The point of being in that state
2567 * is to avoid getting duplicate packets.
2568 *
2569 * HOWEVER, if LINK2 is set the normal spanning tree code
2570 * will mark an interface BLOCKING to avoid multi-cast/broadcast
2571 * loops. Unicast packets CAN still loop if we allow the
2572 * case (hence we only do it in LINK2), but it isn't quite as
2573 * bad as a broadcast packet looping.
2574 */
ac93838f
SS		 2575 if (bif->bif_flags & IFBIF_STP) {
2576 switch (bif->bif_state) {
70d9a675 2577#if 0
ac93838f 2578 case BSTP_IFSTATE_BLOCKING:
70d9a675
MD		 2579 if (sc->sc_ifp->if_flags & IFF_LINK2)
2580 break;
2581 /* fall through */
2582#endif
2583 case BSTP_IFSTATE_L1BLOCKING:
ac93838f
SS		 2584 case BSTP_IFSTATE_LISTENING:
2585 case BSTP_IFSTATE_DISABLED:
2586 goto out;
70d9a675
MD		 2587 default:
2588 break;
ac93838f
SS		 2589 }
2590 }
2591
2592 /*
2593 * Unicast. Make sure it's not for us.
8f7b13ef
SZ		 2594 *
2595 * This loop is MPSAFE; the only blocking operation (bridge_rtupdate)
2596 * is followed by breaking out of the loop.
ac93838f 2597 */
70d9a675 2598 TAILQ_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next) {
ac93838f
SS		 2599 if (bif->bif_ifp->if_type != IFT_ETHER)
2600 continue;
3ce67233 2601
4ee4f753 2602 /*
70d9a675
MD		 2603 * It is destined for an interface linked to the bridge.
2604 * We want the bridge itself to take care of link level
2605 * forwarding to member interfaces so reinput on the bridge.
2606 * i.e. if you ping an IP on a target interface associated
2607 * with the bridge, the arp is-at response should indicate
2608 * the bridge MAC.
4ee4f753 2609 */
ac93838f 2610 if (memcmp(IF_LLADDR(bif->bif_ifp), eh->ether_dhost,
70d9a675 2611 ETHER_ADDR_LEN) == 0) {
ecd27a4c
SZ		 2612 if (bif->bif_ifp != ifp) {
2613 /* XXX loop prevention */
0899cb3e 2614 m->m_flags |= M_ETHER_BRIDGED;
ecd27a4c 2615 }
8f7b13ef
SZ		 2616 if (bif->bif_flags & IFBIF_LEARNING) {
2617 bridge_rtupdate(sc, eh->ether_shost,
2618 ifp, IFBAF_DYNAMIC);
2619 }
70d9a675 2620 new_ifp = bifp; /* not bif->bif_ifp */
b7441d0c 2621 m->m_pkthdr.fw_flags &= ~BRIDGE_MBUF_TAGGED;
ac93838f
SS		 2622 goto out;
2623 }
2624
70d9a675
MD		 2625 /*
2626 * Ignore received packets that were sent by us.
2627 */
ac93838f 2628 if (memcmp(IF_LLADDR(bif->bif_ifp), eh->ether_shost,
70d9a675 2629 ETHER_ADDR_LEN) == 0) {
ac93838f
SS		 2630 m_freem(m);
2631 m = NULL;
2632 goto out;
2633 }
2634 }
2635
2636 /* Perform the bridge forwarding function. */
2637 bridge_forward(sc, m);
2638 m = NULL;
4ee4f753
MD		 2639
2640 /*
70d9a675
MD		 2641 * ether_reinput_oncpu() will reprocess rcvif as
2642 * coming from new_ifp (since we do not specify
2643 * REINPUT_KEEPRCVIF).
4ee4f753 2644 */
ac93838f 2645out:
3ce67233 2646 if (new_ifp != NULL) {
b7441d0c
MD		 2647 /*
2648 * Clear the bridge flag for local processing in
2649 * case the packet gets routed.
2650 */
70d9a675 2651 ether_reinput_oncpu(new_ifp, m, REINPUT_RUNBPF);
3ce67233 2652 m = NULL;
3ce67233 2653 }
d217f5e5 2654 return (m);
ac93838f
SS		 2655}
2656
2657/*
137aa7b3
SZ		 2658 * bridge_start_bcast:
2659 *
2660 * Broadcast the packet sent from bridge to all member
2661 * interfaces.
2662 * This is a simplified version of bridge_broadcast(), however,
2663 * this function expects caller to hold bridge's serializer.
2664 */
2665static void
2666bridge_start_bcast(struct bridge_softc *sc, struct mbuf *m)
2667{
2668 struct bridge_iflist *bif;
2669 struct mbuf *mc;
2670 struct ifnet *dst_if, *bifp;
2671 int used = 0;
2672
2673 bifp = sc->sc_ifp;
2c9effcf 2674 ASSERT_IFNET_SERIALIZED_ALL(bifp);
137aa7b3
SZ		 2675
2676 /*
2677 * Following loop is MPSAFE; nothing is blocking
2678 * in the loop body.
2679 */
70d9a675 2680 TAILQ_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next) {
137aa7b3
SZ		 2681 dst_if = bif->bif_ifp;
2682
2683 if (bif->bif_flags & IFBIF_STP) {
2684 switch (bif->bif_state) {
3677aae9 2685 case BSTP_IFSTATE_L1BLOCKING:
137aa7b3
SZ		 2686 case BSTP_IFSTATE_BLOCKING:
2687 case BSTP_IFSTATE_DISABLED:
2688 continue;
2689 }
2690 }
2691
2692 if ((bif->bif_flags & IFBIF_DISCOVER) == 0 &&
2693 (m->m_flags & (M_BCAST|M_MCAST)) == 0)
2694 continue;
2695
2696 if ((dst_if->if_flags & IFF_RUNNING) == 0)
2697 continue;
2698
70d9a675 2699 if (TAILQ_NEXT(bif, bif_next) == NULL) {
137aa7b3
SZ		 2700 mc = m;
2701 used = 1;
2702 } else {
2703 mc = m_copypacket(m, MB_DONTWAIT);
2704 if (mc == NULL) {
2705 bifp->if_oerrors++;
2706 continue;
2707 }
2708 }
2709 bridge_enqueue(dst_if, mc);
2710 }
2711 if (used == 0)
2712 m_freem(m);
2713}
2714
2715/*
ac93838f
SS		 2716 * bridge_broadcast:
2717 *
2718 * Send a frame to all interfaces that are members of
2719 * the bridge, except for the one on which the packet
2720 * arrived.
2721 */
d217f5e5 2722static void
ac93838f 2723bridge_broadcast(struct bridge_softc *sc, struct ifnet *src_if,
4ee4f753 2724 struct mbuf *m)
ac93838f 2725{
137aa7b3 2726 struct bridge_iflist *bif, *nbif;
4ee4f753 2727 struct ether_header *eh;
ac93838f 2728 struct mbuf *mc;
ecd27a4c 2729 struct ifnet *dst_if, *bifp;
ac93838f 2730 int used = 0;
4ee4f753 2731 int from_us;
ac93838f 2732
ecd27a4c 2733 bifp = sc->sc_ifp;
2c9effcf 2734 ASSERT_IFNET_NOT_SERIALIZED_ALL(bifp);
ecd27a4c 2735
4ee4f753 2736 eh = mtod(m, struct ether_header *);
70d9a675 2737 from_us = bridge_from_us(sc, eh);
4ee4f753 2738
137aa7b3 2739 if (inet_pfil_hook.ph_hashooks > 0
ac93838f 2740#ifdef INET6
d217f5e5 2741 || inet6_pfil_hook.ph_hashooks > 0
ac93838f 2742#endif
137aa7b3 2743 ) {
ecd27a4c 2744 if (bridge_pfil(&m, bifp, src_if, PFIL_IN) != 0)
137aa7b3 2745 return;
ecd27a4c 2746 if (m == NULL)
137aa7b3 2747 return;
ecd27a4c 2748
137aa7b3 2749 /* Filter on the bridge interface before broadcasting */
ecd27a4c 2750 if (bridge_pfil(&m, bifp, NULL, PFIL_OUT) != 0)
137aa7b3 2751 return;
ac93838f
SS		 2752 if (m == NULL)
2753 return;
2754 }
2755
70d9a675 2756 TAILQ_FOREACH_MUTABLE(bif, &sc->sc_iflists[mycpuid], bif_next, nbif) {
ac93838f
SS		 2757 dst_if = bif->bif_ifp;
2758 if (dst_if == src_if)
2759 continue;
2760
2761 if (bif->bif_flags & IFBIF_STP) {
2762 switch (bif->bif_state) {
3677aae9 2763 case BSTP_IFSTATE_L1BLOCKING:
ac93838f
SS		 2764 case BSTP_IFSTATE_BLOCKING:
2765 case BSTP_IFSTATE_DISABLED:
2766 continue;
2767 }
2768 }
2769
2770 if ((bif->bif_flags & IFBIF_DISCOVER) == 0 &&
2771 (m->m_flags & (M_BCAST|M_MCAST)) == 0)
2772 continue;
2773
2774 if ((dst_if->if_flags & IFF_RUNNING) == 0)
2775 continue;
2776
70d9a675 2777 if (TAILQ_NEXT(bif, bif_next) == NULL) {
ac93838f
SS		 2778 mc = m;
2779 used = 1;
2780 } else {
2781 mc = m_copypacket(m, MB_DONTWAIT);
2782 if (mc == NULL) {
2783 sc->sc_ifp->if_oerrors++;
2784 continue;
2785 }
2786 }
137aa7b3
SZ		 2787
2788 /*
2789 * Filter on the output interface. Pass a NULL bridge
2790 * interface pointer so we do not redundantly filter on
2791 * the bridge for each interface we broadcast on.
2792 */
2793 if (inet_pfil_hook.ph_hashooks > 0
2794#ifdef INET6
2795 || inet6_pfil_hook.ph_hashooks > 0
2796#endif
2797 ) {
2798 if (bridge_pfil(&mc, NULL, dst_if, PFIL_OUT) != 0)
2799 continue;
2800 if (mc == NULL)
2801 continue;
2802 }
70d9a675 2803 bridge_handoff(sc, dst_if, mc, from_us);
137aa7b3
SZ		 2804
2805 if (nbif != NULL && !nbif->bif_onlist) {
2806 KKASSERT(bif->bif_onlist);
70d9a675 2807 nbif = TAILQ_NEXT(bif, bif_next);
137aa7b3 2808 }
ac93838f
SS		 2809 }
2810 if (used == 0)
2811 m_freem(m);
2812}
2813
2814/*
d217f5e5
SU		 2815 * bridge_span:
2816 *
2817 * Duplicate a packet out one or more interfaces that are in span mode,
2818 * the original mbuf is unmodified.
2819 */
2820static void
2821bridge_span(struct bridge_softc *sc, struct mbuf *m)
2822{
2823 struct bridge_iflist *bif;
137aa7b3 2824 struct ifnet *dst_if, *bifp;
d217f5e5
SU		 2825 struct mbuf *mc;
2826
137aa7b3 2827 bifp = sc->sc_ifp;
a3dd34d2 2828 ifnet_serialize_all(bifp);
137aa7b3 2829
70d9a675 2830 TAILQ_FOREACH(bif, &sc->sc_spanlist, bif_next) {
d217f5e5
SU		 2831 dst_if = bif->bif_ifp;
2832
2833 if ((dst_if->if_flags & IFF_RUNNING) == 0)
2834 continue;
2835
2836 mc = m_copypacket(m, MB_DONTWAIT);
2837 if (mc == NULL) {
2838 sc->sc_ifp->if_oerrors++;
2839 continue;
2840 }
708a3bfa 2841 bridge_enqueue(dst_if, mc);
d217f5e5 2842 }
137aa7b3 2843
a3dd34d2 2844 ifnet_deserialize_all(bifp);
d217f5e5
SU		 2845}
2846
4394693c 2847static void
002c1265 2848bridge_rtmsg_sync_handler(netmsg_t msg)
4394693c 2849{
002c1265 2850 ifnet_forwardmsg(&msg->lmsg, mycpuid + 1);
4394693c
SZ		 2851}
2852
2853static void
2854bridge_rtmsg_sync(struct bridge_softc *sc)
2855{
002c1265 2856 struct netmsg_base msg;
4394693c 2857
2c9effcf 2858 ASSERT_IFNET_NOT_SERIALIZED_ALL(sc->sc_ifp);
4394693c 2859
002c1265 2860 netmsg_init(&msg, NULL, &curthread->td_msgport,
48e7b118 2861 0, bridge_rtmsg_sync_handler);
002c1265 2862 ifnet_domsg(&msg.lmsg, 0);
4394693c
SZ		 2863}
2864
2865static __inline void
2866bridge_rtinfo_update(struct bridge_rtinfo *bri, struct ifnet *dst_if,
2867 int setflags, uint8_t flags, uint32_t timeo)
2868{
2869 if ((bri->bri_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC &&
2870 bri->bri_ifp != dst_if)
2871 bri->bri_ifp = dst_if;
2872 if ((flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC &&
2873 bri->bri_expire != time_second + timeo)
2874 bri->bri_expire = time_second + timeo;
2875 if (setflags)
2876 bri->bri_flags = flags;
2877}
2878
2879static int
2880bridge_rtinstall_oncpu(struct bridge_softc *sc, const uint8_t *dst,
2881 struct ifnet *dst_if, int setflags, uint8_t flags,
2882 struct bridge_rtinfo **bri0)
2883{
2884 struct bridge_rtnode *brt;
2885 struct bridge_rtinfo *bri;
2886
2887 if (mycpuid == 0) {
2888 brt = bridge_rtnode_lookup(sc, dst);
2889 if (brt != NULL) {
2890 /*
2891 * rtnode for 'dst' already exists. We inform the
2892 * caller about this by leaving bri0 as NULL. The
2893 * caller will terminate the intallation upon getting
2894 * NULL bri0. However, we still need to update the
2895 * rtinfo.
2896 */
2897 KKASSERT(*bri0 == NULL);
2898
2899 /* Update rtinfo */
2900 bridge_rtinfo_update(brt->brt_info, dst_if, setflags,
2901 flags, sc->sc_brttimeout);
2902 return 0;
2903 }
2904
2905 /*
2906 * We only need to check brtcnt on CPU0, since if limit
2907 * is to be exceeded, ENOSPC is returned. Caller knows
2908 * this and will terminate the installation.
2909 */
2910 if (sc->sc_brtcnt >= sc->sc_brtmax)
2911 return ENOSPC;
2912
2913 KKASSERT(*bri0 == NULL);
2914 bri = kmalloc(sizeof(struct bridge_rtinfo), M_DEVBUF,
2915 M_WAITOK | M_ZERO);
2916 *bri0 = bri;
2917
2918 /* Setup rtinfo */
2919 bri->bri_flags = IFBAF_DYNAMIC;
2920 bridge_rtinfo_update(bri, dst_if, setflags, flags,
2921 sc->sc_brttimeout);
2922 } else {
2923 bri = *bri0;
2924 KKASSERT(bri != NULL);
2925 }
2926
2927 brt = kmalloc(sizeof(struct bridge_rtnode), M_DEVBUF,
2928 M_WAITOK | M_ZERO);
2929 memcpy(brt->brt_addr, dst, ETHER_ADDR_LEN);
2930 brt->brt_info = bri;
2931
2932 bridge_rtnode_insert(sc, brt);
2933 return 0;
2934}
2935
2936static void
002c1265 2937bridge_rtinstall_handler(netmsg_t msg)
4394693c 2938{
002c1265 2939 struct netmsg_brsaddr *brmsg = (struct netmsg_brsaddr *)msg;
4394693c
SZ		 2940 int error;
2941
2942 error = bridge_rtinstall_oncpu(brmsg->br_softc,
2943 brmsg->br_dst, brmsg->br_dst_if,
2944 brmsg->br_setflags, brmsg->br_flags,
2945 &brmsg->br_rtinfo);
2946 if (error) {
2947 KKASSERT(mycpuid == 0 && brmsg->br_rtinfo == NULL);
002c1265 2948 lwkt_replymsg(&brmsg->base.lmsg, error);
4394693c
SZ		 2949 return;
2950 } else if (brmsg->br_rtinfo == NULL) {
2951 /* rtnode already exists for 'dst' */
2952 KKASSERT(mycpuid == 0);
002c1265 2953 lwkt_replymsg(&brmsg->base.lmsg, 0);
4394693c
SZ		 2954 return;
2955 }
002c1265 2956 ifnet_forwardmsg(&brmsg->base.lmsg, mycpuid + 1);
4394693c
SZ		 2957}
2958
d217f5e5 2959/*
ac93838f
SS		 2960 * bridge_rtupdate:
2961 *
4394693c 2962 * Add/Update a bridge routing entry.
ac93838f 2963 */
d217f5e5 2964static int
ac93838f 2965bridge_rtupdate(struct bridge_softc *sc, const uint8_t *dst,
4394693c 2966 struct ifnet *dst_if, uint8_t flags)
ac93838f
SS		 2967{
2968 struct bridge_rtnode *brt;
ac93838f
SS		 2969
2970 /*
2971 * A route for this destination might already exist. If so,
2972 * update it, otherwise create a new one.
2973 */
2974 if ((brt = bridge_rtnode_lookup(sc, dst)) == NULL) {
4394693c 2975 struct netmsg_brsaddr *brmsg;
ac93838f 2976
4394693c
SZ		 2977 if (sc->sc_brtcnt >= sc->sc_brtmax)
2978 return ENOSPC;
2979
2980 brmsg = kmalloc(sizeof(*brmsg), M_LWKTMSG, M_WAITOK | M_NULLOK);
2981 if (brmsg == NULL)
2982 return ENOMEM;
2983
002c1265 2984 netmsg_init(&brmsg->base, NULL, &netisr_afree_rport,
48e7b118 2985 0, bridge_rtinstall_handler);
4394693c
SZ		 2986 memcpy(brmsg->br_dst, dst, ETHER_ADDR_LEN);
2987 brmsg->br_dst_if = dst_if;
2988 brmsg->br_flags = flags;
2989 brmsg->br_setflags = 0;
2990 brmsg->br_softc = sc;
2991 brmsg->br_rtinfo = NULL;
2992
002c1265 2993 ifnet_sendmsg(&brmsg->base.lmsg, 0);
4394693c
SZ		 2994 return 0;
2995 }
2996 bridge_rtinfo_update(brt->brt_info, dst_if, 0, flags,
2997 sc->sc_brttimeout);
2998 return 0;
2999}
ac93838f 3000
4394693c
SZ		 3001static int
3002bridge_rtsaddr(struct bridge_softc *sc, const uint8_t *dst,
3003 struct ifnet *dst_if, uint8_t flags)
3004{
3005 struct netmsg_brsaddr brmsg;
ac93838f 3006
2c9effcf 3007 ASSERT_IFNET_NOT_SERIALIZED_ALL(sc->sc_ifp);
ac93838f 3008
002c1265 3009 netmsg_init(&brmsg.base, NULL, &curthread->td_msgport,
48e7b118 3010 0, bridge_rtinstall_handler);
4394693c
SZ		 3011 memcpy(brmsg.br_dst, dst, ETHER_ADDR_LEN);
3012 brmsg.br_dst_if = dst_if;
3013 brmsg.br_flags = flags;
3014 brmsg.br_setflags = 1;
3015 brmsg.br_softc = sc;
3016 brmsg.br_rtinfo = NULL;
ac93838f 3017
002c1265 3018 return ifnet_domsg(&brmsg.base.lmsg, 0);
ac93838f
SS		 3019}
3020
3021/*
3022 * bridge_rtlookup:
3023 *
3024 * Lookup the destination interface for an address.
3025 */
d217f5e5 3026static struct ifnet *
ac93838f
SS		 3027bridge_rtlookup(struct bridge_softc *sc, const uint8_t *addr)
3028{
3029 struct bridge_rtnode *brt;
3030
3031 if ((brt = bridge_rtnode_lookup(sc, addr)) == NULL)
4394693c
SZ		 3032 return NULL;
3033 return brt->brt_info->bri_ifp;
3034}
ac93838f 3035
4394693c 3036static void
002c1265 3037bridge_rtreap_handler(netmsg_t msg)
4394693c 3038{
002c1265 3039 struct bridge_softc *sc = msg->lmsg.u.ms_resultp;
4394693c
SZ		 3040 struct bridge_rtnode *brt, *nbrt;
3041
3042 LIST_FOREACH_MUTABLE(brt, &sc->sc_rtlists[mycpuid], brt_list, nbrt) {
3043 if (brt->brt_info->bri_dead)
3044 bridge_rtnode_destroy(sc, brt);
3045 }
002c1265 3046 ifnet_forwardmsg(&msg->lmsg, mycpuid + 1);
4394693c
SZ		 3047}
3048
3049static void
3050bridge_rtreap(struct bridge_softc *sc)
3051{
002c1265 3052 struct netmsg_base msg;
4394693c 3053
2c9effcf 3054 ASSERT_IFNET_NOT_SERIALIZED_ALL(sc->sc_ifp);
4394693c 3055
002c1265 3056 netmsg_init(&msg, NULL, &curthread->td_msgport,
48e7b118 3057 0, bridge_rtreap_handler);
002c1265 3058 msg.lmsg.u.ms_resultp = sc;
4394693c 3059
002c1265 3060 ifnet_domsg(&msg.lmsg, 0);
ac93838f
SS		 3061}
3062
30ced003
SZ		 3063static void
3064bridge_rtreap_async(struct bridge_softc *sc)
3065{
002c1265 3066 struct netmsg_base *msg;
30ced003 3067
002c1265 3068 msg = kmalloc(sizeof(*msg), M_LWKTMSG, M_WAITOK);
30ced003 3069
002c1265 3070 netmsg_init(msg, NULL, &netisr_afree_rport,
48e7b118 3071 0, bridge_rtreap_handler);
002c1265 3072 msg->lmsg.u.ms_resultp = sc;
30ced003 3073
002c1265 3074 ifnet_sendmsg(&msg->lmsg, 0);
30ced003
SZ		 3075}
3076
ac93838f
SS		 3077/*
3078 * bridge_rttrim:
3079 *
3080 * Trim the routine table so that we have a number
3081 * of routing entries less than or equal to the
3082 * maximum number.
3083 */
d217f5e5 3084static void
ac93838f
SS		 3085bridge_rttrim(struct bridge_softc *sc)
3086{
4394693c
SZ		 3087 struct bridge_rtnode *brt;
3088 int dead;
3089
2c9effcf 3090 ASSERT_IFNET_NOT_SERIALIZED_ALL(sc->sc_ifp);
ac93838f
SS		 3091
3092 /* Make sure we actually need to do this. */
3093 if (sc->sc_brtcnt <= sc->sc_brtmax)
3094 return;
3095
4394693c
SZ		 3096 /*
3097 * Find out how many rtnodes are dead
3098 */
3099 dead = bridge_rtage_finddead(sc);
3100 KKASSERT(dead <= sc->sc_brtcnt);
3101
3102 if (sc->sc_brtcnt - dead <= sc->sc_brtmax) {
3103 /* Enough dead rtnodes are found */
3104 bridge_rtreap(sc);
ac93838f 3105 return;
4394693c 3106 }
ac93838f 3107
4394693c
SZ		 3108 /*
3109 * Kill some dynamic rtnodes to meet the brtmax
3110 */
3111 LIST_FOREACH(brt, &sc->sc_rtlists[mycpuid], brt_list) {
3112 struct bridge_rtinfo *bri = brt->brt_info;
3113
3114 if (bri->bri_dead) {
3115 /*
3116 * We have counted this rtnode in
3117 * bridge_rtage_finddead()
3118 */
3119 continue;
3120 }
3121
3122 if ((bri->bri_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC) {
3123 bri->bri_dead = 1;
3124 ++dead;
3125 KKASSERT(dead <= sc->sc_brtcnt);
3126
3127 if (sc->sc_brtcnt - dead <= sc->sc_brtmax) {
3128 /* Enough rtnodes are collected */
3129 break;
3130 }
ac93838f
SS		 3131 }
3132 }
4394693c
SZ		 3133 if (dead)
3134 bridge_rtreap(sc);
ac93838f
SS		 3135}
3136
3137/*
3138 * bridge_timer:
3139 *
3140 * Aging timer for the bridge.
3141 */
d217f5e5 3142static void
ac93838f
SS		 3143bridge_timer(void *arg)
3144{
3145 struct bridge_softc *sc = arg;
002c1265 3146 struct netmsg_base *msg;
e9d22060
SZ		 3147
3148 KKASSERT(mycpuid == BRIDGE_CFGCPU);
3149
3150 crit_enter();
3151
3152 if (callout_pending(&sc->sc_brcallout) ||
3153 !callout_active(&sc->sc_brcallout)) {
3154 crit_exit();
3155 return;
3156 }
3157 callout_deactivate(&sc->sc_brcallout);
3158
002c1265
MD		 3159 msg = &sc->sc_brtimemsg;
3160 KKASSERT(msg->lmsg.ms_flags & MSGF_DONE);
3161 lwkt_sendmsg(BRIDGE_CFGPORT, &msg->lmsg);
e9d22060
SZ		 3162
3163 crit_exit();
3164}
3165
3166static void
002c1265 3167bridge_timer_handler(netmsg_t msg)
e9d22060 3168{
002c1265 3169 struct bridge_softc *sc = msg->lmsg.u.ms_resultp;
e9d22060
SZ		 3170
3171 KKASSERT(&curthread->td_msgport == BRIDGE_CFGPORT);
3172
3173 crit_enter();
3174 /* Reply ASAP */
002c1265 3175 lwkt_replymsg(&msg->lmsg, 0);
e9d22060 3176 crit_exit();
ac93838f 3177
ac93838f 3178 bridge_rtage(sc);
e9d22060 3179 if (sc->sc_ifp->if_flags & IFF_RUNNING) {
ac93838f
SS		 3180 callout_reset(&sc->sc_brcallout,
3181 bridge_rtable_prune_period * hz, bridge_timer, sc);
e9d22060 3182 }
4394693c 3183}
ac93838f 3184
4394693c
SZ		 3185static int
3186bridge_rtage_finddead(struct bridge_softc *sc)
3187{
3188 struct bridge_rtnode *brt;
3189 int dead = 0;
3190
3191 LIST_FOREACH(brt, &sc->sc_rtlists[mycpuid], brt_list) {
3192 struct bridge_rtinfo *bri = brt->brt_info;
3193
3194 if ((bri->bri_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC &&
3195 time_second >= bri->bri_expire) {
3196 bri->bri_dead = 1;
3197 ++dead;
3198 KKASSERT(dead <= sc->sc_brtcnt);
3199 }
3200 }
3201 return dead;
ac93838f
SS		 3202}
3203
3204/*
3205 * bridge_rtage:
3206 *
3207 * Perform an aging cycle.
3208 */
d217f5e5 3209static void
ac93838f
SS		 3210bridge_rtage(struct bridge_softc *sc)
3211{
2c9effcf 3212 ASSERT_IFNET_NOT_SERIALIZED_ALL(sc->sc_ifp);
ac93838f 3213
4394693c
SZ		 3214 if (bridge_rtage_finddead(sc))
3215 bridge_rtreap(sc);
ac93838f
SS		 3216}
3217
3218/*
3219 * bridge_rtflush:
3220 *
3221 * Remove all dynamic addresses from the bridge.
3222 */
d217f5e5 3223static void
30ced003 3224bridge_rtflush(struct bridge_softc *sc, int bf)
ac93838f 3225{
4394693c
SZ		 3226 struct bridge_rtnode *brt;
3227 int reap;
ac93838f 3228
4394693c
SZ		 3229 reap = 0;
3230 LIST_FOREACH(brt, &sc->sc_rtlists[mycpuid], brt_list) {
3231 struct bridge_rtinfo *bri = brt->brt_info;
3232
30ced003 3233 if ((bf & IFBF_FLUSHALL) ||
4394693c
SZ		 3234 (bri->bri_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC) {
3235 bri->bri_dead = 1;
3236 reap = 1;
3237 }
ac93838f 3238 }
30ced003
SZ		 3239 if (reap) {
3240 if (bf & IFBF_FLUSHSYNC)
3241 bridge_rtreap(sc);
3242 else
3243 bridge_rtreap_async(sc);
3244 }
ac93838f
SS		 3245}
3246
3247/*
3248 * bridge_rtdaddr:
3249 *
3250 * Remove an address from the table.
3251 */
d217f5e5 3252static int
ac93838f
SS		 3253bridge_rtdaddr(struct bridge_softc *sc, const uint8_t *addr)
3254{
3255 struct bridge_rtnode *brt;
3256
2c9effcf 3257 ASSERT_IFNET_NOT_SERIALIZED_ALL(sc->sc_ifp);
4394693c 3258
ac93838f
SS		 3259 if ((brt = bridge_rtnode_lookup(sc, addr)) == NULL)
3260 return (ENOENT);
3261
4394693c
SZ		 3262 /* TODO: add a cheaper delete operation */
3263 brt->brt_info->bri_dead = 1;
3264 bridge_rtreap(sc);
ac93838f
SS		 3265 return (0);
3266}
3267
3268/*
3269 * bridge_rtdelete:
3270 *
3271 * Delete routes to a speicifc member interface.
3272 */
3273void
30ced003 3274bridge_rtdelete(struct bridge_softc *sc, struct ifnet *ifp, int bf)
ac93838f 3275{
4394693c
SZ		 3276 struct bridge_rtnode *brt;
3277 int reap;
ac93838f 3278
4394693c
SZ		 3279 reap = 0;
3280 LIST_FOREACH(brt, &sc->sc_rtlists[mycpuid], brt_list) {
3281 struct bridge_rtinfo *bri = brt->brt_info;
3282
3283 if (bri->bri_ifp == ifp &&
30ced003 3284 ((bf & IFBF_FLUSHALL) ||
4394693c
SZ		 3285 (bri->bri_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC)) {
3286 bri->bri_dead = 1;
3287 reap = 1;
3288 }
ac93838f 3289 }
30ced003
SZ		 3290 if (reap) {
3291 if (bf & IFBF_FLUSHSYNC)
3292 bridge_rtreap(sc);
3293 else
3294 bridge_rtreap_async(sc);
3295 }
ac93838f
SS		 3296}
3297
3298/*
3299 * bridge_rtable_init:
3300 *
3301 * Initialize the route table for this bridge.
3302 */
4394693c 3303static void
ac93838f
SS		 3304bridge_rtable_init(struct bridge_softc *sc)
3305{
4394693c 3306 int cpu;
ac93838f 3307
4394693c
SZ		 3308 /*
3309 * Initialize per-cpu hash tables
3310 */
3311 sc->sc_rthashs = kmalloc(sizeof(*sc->sc_rthashs) * ncpus,
3312 M_DEVBUF, M_WAITOK);
3313 for (cpu = 0; cpu < ncpus; ++cpu) {
3314 int i;
ac93838f 3315
4394693c
SZ		 3316 sc->sc_rthashs[cpu] =
3317 kmalloc(sizeof(struct bridge_rtnode_head) * BRIDGE_RTHASH_SIZE,
3318 M_DEVBUF, M_WAITOK);
ac93838f 3319
4394693c
SZ		 3320 for (i = 0; i < BRIDGE_RTHASH_SIZE; i++)
3321 LIST_INIT(&sc->sc_rthashs[cpu][i]);
3322 }
0ced1954 3323 sc->sc_rthash_key = karc4random();
ac93838f 3324
4394693c
SZ		 3325 /*
3326 * Initialize per-cpu lists
3327 */
3328 sc->sc_rtlists = kmalloc(sizeof(struct bridge_rtnode_head) * ncpus,
3329 M_DEVBUF, M_WAITOK);
3330 for (cpu = 0; cpu < ncpus; ++cpu)
3331 LIST_INIT(&sc->sc_rtlists[cpu]);
ac93838f
SS		 3332}
3333
3334/*
3335 * bridge_rtable_fini:
3336 *
3337 * Deconstruct the route table for this bridge.
3338 */
d217f5e5 3339static void
ac93838f
SS		 3340bridge_rtable_fini(struct bridge_softc *sc)
3341{
4394693c 3342 int cpu;
ac93838f 3343
4394693c
SZ		 3344 /*
3345 * Free per-cpu hash tables
3346 */
3347 for (cpu = 0; cpu < ncpus; ++cpu)
3348 kfree(sc->sc_rthashs[cpu], M_DEVBUF);
3349 kfree(sc->sc_rthashs, M_DEVBUF);
3350
3351 /*
3352 * Free per-cpu lists
3353 */
3354 kfree(sc->sc_rtlists, M_DEVBUF);
ac93838f
SS		 3355}
3356
3357/*
3358 * The following hash function is adapted from "Hash Functions" by Bob Jenkins
3359 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997).
3360 */
3361#define mix(a, b, c) \
3362do { \
3363 a -= b; a -= c; a ^= (c >> 13); \
3364 b -= c; b -= a; b ^= (a << 8); \
3365 c -= a; c -= b; c ^= (b >> 13); \
3366 a -= b; a -= c; a ^= (c >> 12); \
3367 b -= c; b -= a; b ^= (a << 16); \
3368 c -= a; c -= b; c ^= (b >> 5); \
3369 a -= b; a -= c; a ^= (c >> 3); \
3370 b -= c; b -= a; b ^= (a << 10); \
3371 c -= a; c -= b; c ^= (b >> 15); \
3372} while (/*CONSTCOND*/0)
3373
3374static __inline uint32_t
3375bridge_rthash(struct bridge_softc *sc, const uint8_t *addr)
3376{
3377 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = sc->sc_rthash_key;
3378
3379 b += addr[5] << 8;
3380 b += addr[4];
3381 a += addr[3] << 24;
3382 a += addr[2] << 16;
3383 a += addr[1] << 8;
3384 a += addr[0];
3385
3386 mix(a, b, c);
3387
3388 return (c & BRIDGE_RTHASH_MASK);
3389}
3390
3391#undef mix
3392
d217f5e5
SU		 3393static int
3394bridge_rtnode_addr_cmp(const uint8_t *a, const uint8_t *b)
3395{
3396 int i, d;
3397
3398 for (i = 0, d = 0; i < ETHER_ADDR_LEN && d == 0; i++) {
3399 d = ((int)a[i]) - ((int)b[i]);
3400 }
3401
3402 return (d);
3403}
3404
ac93838f
SS		 3405/*
3406 * bridge_rtnode_lookup:
3407 *
3408 * Look up a bridge route node for the specified destination.
3409 */
d217f5e5 3410static struct bridge_rtnode *
ac93838f
SS		 3411bridge_rtnode_lookup(struct bridge_softc *sc, const uint8_t *addr)
3412{
3413 struct bridge_rtnode *brt;
3414 uint32_t hash;
3415 int dir;
3416
3417 hash = bridge_rthash(sc, addr);
4394693c 3418 LIST_FOREACH(brt, &sc->sc_rthashs[mycpuid][hash], brt_hash) {
d217f5e5 3419 dir = bridge_rtnode_addr_cmp(addr, brt->brt_addr);
ac93838f
SS		 3420 if (dir == 0)
3421 return (brt);
3422 if (dir > 0)
3423 return (NULL);
3424 }
3425
3426 return (NULL);
3427}
3428
3429/*
3430 * bridge_rtnode_insert:
3431 *
4394693c
SZ		 3432 * Insert the specified bridge node into the route table.
3433 * Caller has to make sure that rtnode does not exist.
ac93838f 3434 */
4394693c 3435static void
ac93838f
SS		 3436bridge_rtnode_insert(struct bridge_softc *sc, struct bridge_rtnode *brt)
3437{
3438 struct bridge_rtnode *lbrt;
3439 uint32_t hash;
3440 int dir;
3441
3442 hash = bridge_rthash(sc, brt->brt_addr);
3443
4394693c 3444 lbrt = LIST_FIRST(&sc->sc_rthashs[mycpuid][hash]);
ac93838f 3445 if (lbrt == NULL) {
70d9a675
MD		 3446 LIST_INSERT_HEAD(&sc->sc_rthashs[mycpuid][hash],
3447 brt, brt_hash);
ac93838f
SS		 3448 goto out;
3449 }
3450
3451 do {
d217f5e5 3452 dir = bridge_rtnode_addr_cmp(brt->b