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kernel - Remove mplock from KTRACE paths
[dragonfly.git] / sys / net / if.c
blobb8456b931662aca017615e4ad85995bd426296ba
1 /*
2 * Copyright (c) 1980, 1986, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * @(#)if.c 8.3 (Berkeley) 1/4/94
30 * $FreeBSD: src/sys/net/if.c,v 1.185 2004/03/13 02:35:03 brooks Exp $
31 */
32
33 #include "opt_compat.h"
34 #include "opt_inet6.h"
35 #include "opt_inet.h"
36 #include "opt_ifpoll.h"
37
38 #include <sys/param.h>
39 #include <sys/malloc.h>
40 #include <sys/mbuf.h>
41 #include <sys/systm.h>
42 #include <sys/proc.h>
43 #include <sys/priv.h>
44 #include <sys/protosw.h>
45 #include <sys/socket.h>
46 #include <sys/socketvar.h>
47 #include <sys/socketops.h>
48 #include <sys/kernel.h>
49 #include <sys/ktr.h>
50 #include <sys/mutex.h>
51 #include <sys/sockio.h>
52 #include <sys/syslog.h>
53 #include <sys/sysctl.h>
54 #include <sys/domain.h>
55 #include <sys/thread.h>
56 #include <sys/serialize.h>
57 #include <sys/bus.h>
58
59 #include <sys/thread2.h>
60 #include <sys/msgport2.h>
61 #include <sys/mutex2.h>
62
63 #include <net/if.h>
64 #include <net/if_arp.h>
65 #include <net/if_dl.h>
66 #include <net/if_types.h>
67 #include <net/if_var.h>
68 #include <net/ifq_var.h>
69 #include <net/radix.h>
70 #include <net/route.h>
71 #include <net/if_clone.h>
72 #include <net/netisr2.h>
73 #include <net/netmsg2.h>
74
75 #include <machine/atomic.h>
76 #include <machine/stdarg.h>
77 #include <machine/smp.h>
78
79 #if defined(INET) || defined(INET6)
80 /*XXX*/
81 #include <netinet/in.h>
82 #include <netinet/in_var.h>
83 #include <netinet/if_ether.h>
84 #ifdef INET6
85 #include <netinet6/in6_var.h>
86 #include <netinet6/in6_ifattach.h>
87 #endif
88 #endif
89
90 #if defined(COMPAT_43)
91 #include <emulation/43bsd/43bsd_socket.h>
92 #endif /* COMPAT_43 */
93
94 struct netmsg_ifaddr {
95 struct netmsg_base base;
96 struct ifaddr *ifa;
97 struct ifnet *ifp;
98 int tail;
99 };
100
101 struct ifsubq_stage_head {
102 TAILQ_HEAD(, ifsubq_stage) stg_head;
103 } __cachealign;
104
105 /*
106 * System initialization
107 */
108 static void if_attachdomain(void *);
109 static void if_attachdomain1(struct ifnet *);
110 static int ifconf(u_long, caddr_t, struct ucred *);
111 static void ifinit(void *);
112 static void ifnetinit(void *);
113 static void if_slowtimo(void *);
114 static void link_rtrequest(int, struct rtentry *);
115 static int if_rtdel(struct radix_node *, void *);
116 static void if_slowtimo_dispatch(netmsg_t);
117
118 /* Helper functions */
119 static void ifsq_watchdog_reset(struct ifsubq_watchdog *);
120 static int if_delmulti_serialized(struct ifnet *, struct sockaddr *);
121 static struct ifnet_array *ifnet_array_alloc(int);
122 static void ifnet_array_free(struct ifnet_array *);
123 static struct ifnet_array *ifnet_array_add(struct ifnet *,
124 const struct ifnet_array *);
125 static struct ifnet_array *ifnet_array_del(struct ifnet *,
126 const struct ifnet_array *);
127
128 #ifdef INET6
129 /*
130 * XXX: declare here to avoid to include many inet6 related files..
131 * should be more generalized?
132 */
133 extern void nd6_setmtu(struct ifnet *);
134 #endif
135
136 SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers");
137 SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management");
138
139 static int ifsq_stage_cntmax = 4;
140 TUNABLE_INT("net.link.stage_cntmax", &ifsq_stage_cntmax);
141 SYSCTL_INT(_net_link, OID_AUTO, stage_cntmax, CTLFLAG_RW,
142 &ifsq_stage_cntmax, 0, "ifq staging packet count max");
143
144 static int if_stats_compat = 0;
145 SYSCTL_INT(_net_link, OID_AUTO, stats_compat, CTLFLAG_RW,
146 &if_stats_compat, 0, "Compat the old ifnet stats");
147
148 SYSINIT(interfaces, SI_SUB_PROTO_IF, SI_ORDER_FIRST, ifinit, NULL);
149 /* Must be after netisr_init */
150 SYSINIT(ifnet, SI_SUB_PRE_DRIVERS, SI_ORDER_SECOND, ifnetinit, NULL);
151
152 static if_com_alloc_t *if_com_alloc[256];
153 static if_com_free_t *if_com_free[256];
154
155 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address");
156 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address");
157 MALLOC_DEFINE(M_IFNET, "ifnet", "interface structure");
158
159 int ifqmaxlen = IFQ_MAXLEN;
160 struct ifnethead ifnet = TAILQ_HEAD_INITIALIZER(ifnet);
161
162 static struct ifnet_array ifnet_array0;
163 static struct ifnet_array *ifnet_array = &ifnet_array0;
164
165 static struct callout if_slowtimo_timer;
166 static struct netmsg_base if_slowtimo_netmsg;
167
168 int if_index = 0;
169 struct ifnet **ifindex2ifnet = NULL;
170 static struct thread *ifnet_threads[MAXCPU];
171 static struct mtx ifnet_mtx = MTX_INITIALIZER("ifnet");
172
173 static struct ifsubq_stage_head ifsubq_stage_heads[MAXCPU];
174
175 #ifdef notyet
176 #define IFQ_KTR_STRING "ifq=%p"
177 #define IFQ_KTR_ARGS struct ifaltq *ifq
178 #ifndef KTR_IFQ
179 #define KTR_IFQ KTR_ALL
180 #endif
181 KTR_INFO_MASTER(ifq);
182 KTR_INFO(KTR_IFQ, ifq, enqueue, 0, IFQ_KTR_STRING, IFQ_KTR_ARGS);
183 KTR_INFO(KTR_IFQ, ifq, dequeue, 1, IFQ_KTR_STRING, IFQ_KTR_ARGS);
184 #define logifq(name, arg) KTR_LOG(ifq_ ## name, arg)
185
186 #define IF_START_KTR_STRING "ifp=%p"
187 #define IF_START_KTR_ARGS struct ifnet *ifp
188 #ifndef KTR_IF_START
189 #define KTR_IF_START KTR_ALL
190 #endif
191 KTR_INFO_MASTER(if_start);
192 KTR_INFO(KTR_IF_START, if_start, run, 0,
193 IF_START_KTR_STRING, IF_START_KTR_ARGS);
194 KTR_INFO(KTR_IF_START, if_start, sched, 1,
195 IF_START_KTR_STRING, IF_START_KTR_ARGS);
196 KTR_INFO(KTR_IF_START, if_start, avoid, 2,
197 IF_START_KTR_STRING, IF_START_KTR_ARGS);
198 KTR_INFO(KTR_IF_START, if_start, contend_sched, 3,
199 IF_START_KTR_STRING, IF_START_KTR_ARGS);
200 KTR_INFO(KTR_IF_START, if_start, chase_sched, 4,
201 IF_START_KTR_STRING, IF_START_KTR_ARGS);
202 #define logifstart(name, arg) KTR_LOG(if_start_ ## name, arg)
203 #endif
204
205 TAILQ_HEAD(, ifg_group) ifg_head = TAILQ_HEAD_INITIALIZER(ifg_head);
206
207 /*
208 * Network interface utility routines.
209 *
210 * Routines with ifa_ifwith* names take sockaddr *'s as
211 * parameters.
212 */
213 /* ARGSUSED*/
214 static void
215 ifinit(void *dummy)
216 {
217 struct ifnet *ifp;
218
219 callout_init_mp(&if_slowtimo_timer);
220 netmsg_init(&if_slowtimo_netmsg, NULL, &netisr_adone_rport,
221 MSGF_PRIORITY, if_slowtimo_dispatch);
222
223 /* XXX is this necessary? */
224 ifnet_lock();
225 TAILQ_FOREACH(ifp, &ifnetlist, if_link) {
226 if (ifp->if_snd.altq_maxlen == 0) {
227 if_printf(ifp, "XXX: driver didn't set altq_maxlen\n");
228 ifq_set_maxlen(&ifp->if_snd, ifqmaxlen);
229 }
230 }
231 ifnet_unlock();
232
233 /* Start if_slowtimo */
234 lwkt_sendmsg(netisr_cpuport(0), &if_slowtimo_netmsg.lmsg);
235 }
236
237 static void
238 ifsq_ifstart_ipifunc(void *arg)
239 {
240 struct ifaltq_subque *ifsq = arg;
241 struct lwkt_msg *lmsg = ifsq_get_ifstart_lmsg(ifsq, mycpuid);
242
243 crit_enter();
244 if (lmsg->ms_flags & MSGF_DONE)
245 lwkt_sendmsg_oncpu(netisr_cpuport(mycpuid), lmsg);
246 crit_exit();
247 }
248
249 static __inline void
250 ifsq_stage_remove(struct ifsubq_stage_head *head, struct ifsubq_stage *stage)
251 {
252 KKASSERT(stage->stg_flags & IFSQ_STAGE_FLAG_QUED);
253 TAILQ_REMOVE(&head->stg_head, stage, stg_link);
254 stage->stg_flags &= ~(IFSQ_STAGE_FLAG_QUED | IFSQ_STAGE_FLAG_SCHED);
255 stage->stg_cnt = 0;
256 stage->stg_len = 0;
257 }
258
259 static __inline void
260 ifsq_stage_insert(struct ifsubq_stage_head *head, struct ifsubq_stage *stage)
261 {
262 KKASSERT((stage->stg_flags &
263 (IFSQ_STAGE_FLAG_QUED | IFSQ_STAGE_FLAG_SCHED)) == 0);
264 stage->stg_flags |= IFSQ_STAGE_FLAG_QUED;
265 TAILQ_INSERT_TAIL(&head->stg_head, stage, stg_link);
266 }
267
268 /*
269 * Schedule ifnet.if_start on the subqueue owner CPU
270 */
271 static void
272 ifsq_ifstart_schedule(struct ifaltq_subque *ifsq, int force)
273 {
274 int cpu;
275
276 if (!force && curthread->td_type == TD_TYPE_NETISR &&
277 ifsq_stage_cntmax > 0) {
278 struct ifsubq_stage *stage = ifsq_get_stage(ifsq, mycpuid);
279
280 stage->stg_cnt = 0;
281 stage->stg_len = 0;
282 if ((stage->stg_flags & IFSQ_STAGE_FLAG_QUED) == 0)
283 ifsq_stage_insert(&ifsubq_stage_heads[mycpuid], stage);
284 stage->stg_flags |= IFSQ_STAGE_FLAG_SCHED;
285 return;
286 }
287
288 cpu = ifsq_get_cpuid(ifsq);
289 if (cpu != mycpuid)
290 lwkt_send_ipiq(globaldata_find(cpu), ifsq_ifstart_ipifunc, ifsq);
291 else
292 ifsq_ifstart_ipifunc(ifsq);
293 }
294
295 /*
296 * NOTE:
297 * This function will release ifnet.if_start subqueue interlock,
298 * if ifnet.if_start for the subqueue does not need to be scheduled
299 */
300 static __inline int
301 ifsq_ifstart_need_schedule(struct ifaltq_subque *ifsq, int running)
302 {
303 if (!running || ifsq_is_empty(ifsq)
304 #ifdef ALTQ
305 || ifsq->ifsq_altq->altq_tbr != NULL
306 #endif
307 ) {
308 ALTQ_SQ_LOCK(ifsq);
309 /*
310 * ifnet.if_start subqueue interlock is released, if:
311 * 1) Hardware can not take any packets, due to
312 * o interface is marked down
313 * o hardware queue is full (ifsq_is_oactive)
314 * Under the second situation, hardware interrupt
315 * or polling(4) will call/schedule ifnet.if_start
316 * on the subqueue when hardware queue is ready
317 * 2) There is no packet in the subqueue.
318 * Further ifq_dispatch or ifq_handoff will call/
319 * schedule ifnet.if_start on the subqueue.
320 * 3) TBR is used and it does not allow further
321 * dequeueing.
322 * TBR callout will call ifnet.if_start on the
323 * subqueue.
324 */
325 if (!running || !ifsq_data_ready(ifsq)) {
326 ifsq_clr_started(ifsq);
327 ALTQ_SQ_UNLOCK(ifsq);
328 return 0;
329 }
330 ALTQ_SQ_UNLOCK(ifsq);
331 }
332 return 1;
333 }
334
335 static void
336 ifsq_ifstart_dispatch(netmsg_t msg)
337 {
338 struct lwkt_msg *lmsg = &msg->base.lmsg;
339 struct ifaltq_subque *ifsq = lmsg->u.ms_resultp;
340 struct ifnet *ifp = ifsq_get_ifp(ifsq);
341 struct globaldata *gd = mycpu;
342 int running = 0, need_sched;
343
344 crit_enter_gd(gd);
345
346 lwkt_replymsg(lmsg, 0); /* reply ASAP */
347
348 if (gd->gd_cpuid != ifsq_get_cpuid(ifsq)) {
349 /*
350 * We need to chase the subqueue owner CPU change.
351 */
352 ifsq_ifstart_schedule(ifsq, 1);
353 crit_exit_gd(gd);
354 return;
355 }
356
357 ifsq_serialize_hw(ifsq);
358 if ((ifp->if_flags & IFF_RUNNING) && !ifsq_is_oactive(ifsq)) {
359 ifp->if_start(ifp, ifsq);
360 if ((ifp->if_flags & IFF_RUNNING) && !ifsq_is_oactive(ifsq))
361 running = 1;
362 }
363 need_sched = ifsq_ifstart_need_schedule(ifsq, running);
364 ifsq_deserialize_hw(ifsq);
365
366 if (need_sched) {
367 /*
368 * More data need to be transmitted, ifnet.if_start is
369 * scheduled on the subqueue owner CPU, and we keep going.
370 * NOTE: ifnet.if_start subqueue interlock is not released.
371 */
372 ifsq_ifstart_schedule(ifsq, 0);
373 }
374
375 crit_exit_gd(gd);
376 }
377
378 /* Device driver ifnet.if_start helper function */
379 void
380 ifsq_devstart(struct ifaltq_subque *ifsq)
381 {
382 struct ifnet *ifp = ifsq_get_ifp(ifsq);
383 int running = 0;
384
385 ASSERT_ALTQ_SQ_SERIALIZED_HW(ifsq);
386
387 ALTQ_SQ_LOCK(ifsq);
388 if (ifsq_is_started(ifsq) || !ifsq_data_ready(ifsq)) {
389 ALTQ_SQ_UNLOCK(ifsq);
390 return;
391 }
392 ifsq_set_started(ifsq);
393 ALTQ_SQ_UNLOCK(ifsq);
394
395 ifp->if_start(ifp, ifsq);
396
397 if ((ifp->if_flags & IFF_RUNNING) && !ifsq_is_oactive(ifsq))
398 running = 1;
399
400 if (ifsq_ifstart_need_schedule(ifsq, running)) {
401 /*
402 * More data need to be transmitted, ifnet.if_start is
403 * scheduled on ifnet's CPU, and we keep going.
404 * NOTE: ifnet.if_start interlock is not released.
405 */
406 ifsq_ifstart_schedule(ifsq, 0);
407 }
408 }
409
410 void
411 if_devstart(struct ifnet *ifp)
412 {
413 ifsq_devstart(ifq_get_subq_default(&ifp->if_snd));
414 }
415
416 /* Device driver ifnet.if_start schedule helper function */
417 void
418 ifsq_devstart_sched(struct ifaltq_subque *ifsq)
419 {
420 ifsq_ifstart_schedule(ifsq, 1);
421 }
422
423 void
424 if_devstart_sched(struct ifnet *ifp)
425 {
426 ifsq_devstart_sched(ifq_get_subq_default(&ifp->if_snd));
427 }
428
429 static void
430 if_default_serialize(struct ifnet *ifp, enum ifnet_serialize slz __unused)
431 {
432 lwkt_serialize_enter(ifp->if_serializer);
433 }
434
435 static void
436 if_default_deserialize(struct ifnet *ifp, enum ifnet_serialize slz __unused)
437 {
438 lwkt_serialize_exit(ifp->if_serializer);
439 }
440
441 static int
442 if_default_tryserialize(struct ifnet *ifp, enum ifnet_serialize slz __unused)
443 {
444 return lwkt_serialize_try(ifp->if_serializer);
445 }
446
447 #ifdef INVARIANTS
448 static void
449 if_default_serialize_assert(struct ifnet *ifp,
450 enum ifnet_serialize slz __unused,
451 boolean_t serialized)
452 {
453 if (serialized)
454 ASSERT_SERIALIZED(ifp->if_serializer);
455 else
456 ASSERT_NOT_SERIALIZED(ifp->if_serializer);
457 }
458 #endif
459
460 /*
461 * Attach an interface to the list of "active" interfaces.
462 *
463 * The serializer is optional.
464 */
465 void
466 if_attach(struct ifnet *ifp, lwkt_serialize_t serializer)
467 {
468 unsigned socksize;
469 int namelen, masklen;
470 struct sockaddr_dl *sdl, *sdl_addr;
471 struct ifaddr *ifa;
472 struct ifaltq *ifq;
473 struct ifnet **old_ifindex2ifnet = NULL;
474 struct ifnet_array *old_ifnet_array;
475 int i, q;
476
477 static int if_indexlim = 8;
478
479 if (ifp->if_serialize != NULL) {
480 KASSERT(ifp->if_deserialize != NULL &&
481 ifp->if_tryserialize != NULL &&
482 ifp->if_serialize_assert != NULL,
483 ("serialize functions are partially setup"));
484
485 /*
486 * If the device supplies serialize functions,
487 * then clear if_serializer to catch any invalid
488 * usage of this field.
489 */
490 KASSERT(serializer == NULL,
491 ("both serialize functions and default serializer "
492 "are supplied"));
493 ifp->if_serializer = NULL;
494 } else {
495 KASSERT(ifp->if_deserialize == NULL &&
496 ifp->if_tryserialize == NULL &&
497 ifp->if_serialize_assert == NULL,
498 ("serialize functions are partially setup"));
499 ifp->if_serialize = if_default_serialize;
500 ifp->if_deserialize = if_default_deserialize;
501 ifp->if_tryserialize = if_default_tryserialize;
502 #ifdef INVARIANTS
503 ifp->if_serialize_assert = if_default_serialize_assert;
504 #endif
505
506 /*
507 * The serializer can be passed in from the device,
508 * allowing the same serializer to be used for both
509 * the interrupt interlock and the device queue.
510 * If not specified, the netif structure will use an
511 * embedded serializer.
512 */
513 if (serializer == NULL) {
514 serializer = &ifp->if_default_serializer;
515 lwkt_serialize_init(serializer);
516 }
517 ifp->if_serializer = serializer;
518 }
519
520 /*
521 * XXX -
522 * The old code would work if the interface passed a pre-existing
523 * chain of ifaddrs to this code. We don't trust our callers to
524 * properly initialize the tailq, however, so we no longer allow
525 * this unlikely case.
526 */
527 ifp->if_addrheads = kmalloc(ncpus * sizeof(struct ifaddrhead),
528 M_IFADDR, M_WAITOK | M_ZERO);
529 for (i = 0; i < ncpus; ++i)
530 TAILQ_INIT(&ifp->if_addrheads[i]);
531
532 TAILQ_INIT(&ifp->if_multiaddrs);
533 TAILQ_INIT(&ifp->if_groups);
534 getmicrotime(&ifp->if_lastchange);
535
536 /*
537 * create a Link Level name for this device
538 */
539 namelen = strlen(ifp->if_xname);
540 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + namelen;
541 socksize = masklen + ifp->if_addrlen;
542 if (socksize < sizeof(*sdl))
543 socksize = sizeof(*sdl);
544 socksize = RT_ROUNDUP(socksize);
545 ifa = ifa_create(sizeof(struct ifaddr) + 2 * socksize);
546 sdl = sdl_addr = (struct sockaddr_dl *)(ifa + 1);
547 sdl->sdl_len = socksize;
548 sdl->sdl_family = AF_LINK;
549 bcopy(ifp->if_xname, sdl->sdl_data, namelen);
550 sdl->sdl_nlen = namelen;
551 sdl->sdl_type = ifp->if_type;
552 ifp->if_lladdr = ifa;
553 ifa->ifa_ifp = ifp;
554 ifa->ifa_rtrequest = link_rtrequest;
555 ifa->ifa_addr = (struct sockaddr *)sdl;
556 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
557 ifa->ifa_netmask = (struct sockaddr *)sdl;
558 sdl->sdl_len = masklen;
559 while (namelen != 0)
560 sdl->sdl_data[--namelen] = 0xff;
561 ifa_iflink(ifa, ifp, 0 /* Insert head */);
562
563 ifp->if_data_pcpu = kmalloc_cachealign(
564 ncpus * sizeof(struct ifdata_pcpu), M_DEVBUF, M_WAITOK | M_ZERO);
565
566 if (ifp->if_mapsubq == NULL)
567 ifp->if_mapsubq = ifq_mapsubq_default;
568
569 ifq = &ifp->if_snd;
570 ifq->altq_type = 0;
571 ifq->altq_disc = NULL;
572 ifq->altq_flags &= ALTQF_CANTCHANGE;
573 ifq->altq_tbr = NULL;
574 ifq->altq_ifp = ifp;
575
576 if (ifq->altq_subq_cnt <= 0)
577 ifq->altq_subq_cnt = 1;
578 ifq->altq_subq = kmalloc_cachealign(
579 ifq->altq_subq_cnt * sizeof(struct ifaltq_subque),
580 M_DEVBUF, M_WAITOK | M_ZERO);
581
582 if (ifq->altq_maxlen == 0) {
583 if_printf(ifp, "driver didn't set altq_maxlen\n");
584 ifq_set_maxlen(ifq, ifqmaxlen);
585 }
586
587 for (q = 0; q < ifq->altq_subq_cnt; ++q) {
588 struct ifaltq_subque *ifsq = &ifq->altq_subq[q];
589
590 ALTQ_SQ_LOCK_INIT(ifsq);
591 ifsq->ifsq_index = q;
592
593 ifsq->ifsq_altq = ifq;
594 ifsq->ifsq_ifp = ifp;
595
596 ifsq->ifsq_maxlen = ifq->altq_maxlen;
597 ifsq->ifsq_maxbcnt = ifsq->ifsq_maxlen * MCLBYTES;
598 ifsq->ifsq_prepended = NULL;
599 ifsq->ifsq_started = 0;
600 ifsq->ifsq_hw_oactive = 0;
601 ifsq_set_cpuid(ifsq, 0);
602 if (ifp->if_serializer != NULL)
603 ifsq_set_hw_serialize(ifsq, ifp->if_serializer);
604
605 ifsq->ifsq_stage =
606 kmalloc_cachealign(ncpus * sizeof(struct ifsubq_stage),
607 M_DEVBUF, M_WAITOK | M_ZERO);
608 for (i = 0; i < ncpus; ++i)
609 ifsq->ifsq_stage[i].stg_subq = ifsq;
610
611 ifsq->ifsq_ifstart_nmsg =
612 kmalloc(ncpus * sizeof(struct netmsg_base),
613 M_LWKTMSG, M_WAITOK);
614 for (i = 0; i < ncpus; ++i) {
615 netmsg_init(&ifsq->ifsq_ifstart_nmsg[i], NULL,
616 &netisr_adone_rport, 0, ifsq_ifstart_dispatch);
617 ifsq->ifsq_ifstart_nmsg[i].lmsg.u.ms_resultp = ifsq;
618 }
619 }
620 ifq_set_classic(ifq);
621
622 /*
623 * Increase mbuf cluster/jcluster limits for the mbufs that
624 * could sit on the device queues for quite some time.
625 */
626 if (ifp->if_nmbclusters > 0)
627 mcl_inclimit(ifp->if_nmbclusters);
628 if (ifp->if_nmbjclusters > 0)
629 mjcl_inclimit(ifp->if_nmbjclusters);
630
631 /*
632 * Install this ifp into ifindex2inet, ifnet queue and ifnet
633 * array after it is setup.
634 *
635 * Protect ifindex2ifnet, ifnet queue and ifnet array changes
636 * by ifnet lock, so that non-netisr threads could get a
637 * consistent view.
638 */
639 ifnet_lock();
640
641 /* Don't update if_index until ifindex2ifnet is setup */
642 ifp->if_index = if_index + 1;
643 sdl_addr->sdl_index = ifp->if_index;
644
645 /*
646 * Install this ifp into ifindex2ifnet
647 */
648 if (ifindex2ifnet == NULL || ifp->if_index >= if_indexlim) {
649 unsigned int n;
650 struct ifnet **q;
651
652 /*
653 * Grow ifindex2ifnet
654 */
655 if_indexlim <<= 1;
656 n = if_indexlim * sizeof(*q);
657 q = kmalloc(n, M_IFADDR, M_WAITOK | M_ZERO);
658 if (ifindex2ifnet != NULL) {
659 bcopy(ifindex2ifnet, q, n/2);
660 /* Free old ifindex2ifnet after sync all netisrs */
661 old_ifindex2ifnet = ifindex2ifnet;
662 }
663 ifindex2ifnet = q;
664 }
665 ifindex2ifnet[ifp->if_index] = ifp;
666 /*
667 * Update if_index after this ifp is installed into ifindex2ifnet,
668 * so that netisrs could get a consistent view of ifindex2ifnet.
669 */
670 cpu_sfence();
671 if_index = ifp->if_index;
672
673 /*
674 * Install this ifp into ifnet array.
675 */
676 /* Free old ifnet array after sync all netisrs */
677 old_ifnet_array = ifnet_array;
678 ifnet_array = ifnet_array_add(ifp, old_ifnet_array);
679
680 /*
681 * Install this ifp into ifnet queue.
682 */
683 TAILQ_INSERT_TAIL(&ifnetlist, ifp, if_link);
684
685 ifnet_unlock();
686
687 /*
688 * Sync all netisrs so that the old ifindex2ifnet and ifnet array
689 * are no longer accessed and we can free them safely later on.
690 */
691 netmsg_service_sync();
692 if (old_ifindex2ifnet != NULL)
693 kfree(old_ifindex2ifnet, M_IFADDR);
694 ifnet_array_free(old_ifnet_array);
695
696 if (!SLIST_EMPTY(&domains))
697 if_attachdomain1(ifp);
698
699 /* Announce the interface. */
700 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp);
701 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL);
702 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
703 }
704
705 static void
706 if_attachdomain(void *dummy)
707 {
708 struct ifnet *ifp;
709
710 ifnet_lock();
711 TAILQ_FOREACH(ifp, &ifnetlist, if_list)
712 if_attachdomain1(ifp);
713 ifnet_unlock();
714 }
715 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_FIRST,
716 if_attachdomain, NULL);
717
718 static void
719 if_attachdomain1(struct ifnet *ifp)
720 {
721 struct domain *dp;
722
723 crit_enter();
724
725 /* address family dependent data region */
726 bzero(ifp->if_afdata, sizeof(ifp->if_afdata));
727 SLIST_FOREACH(dp, &domains, dom_next)
728 if (dp->dom_ifattach)
729 ifp->if_afdata[dp->dom_family] =
730 (*dp->dom_ifattach)(ifp);
731 crit_exit();
732 }
733
734 /*
735 * Purge all addresses whose type is _not_ AF_LINK
736 */
737 static void
738 if_purgeaddrs_nolink_dispatch(netmsg_t nmsg)
739 {
740 struct lwkt_msg *lmsg = &nmsg->lmsg;
741 struct ifnet *ifp = lmsg->u.ms_resultp;
742 struct ifaddr_container *ifac, *next;
743
744 ASSERT_IN_NETISR(0);
745
746 /*
747 * The ifaddr processing in the following loop will block,
748 * however, this function is called in netisr0, in which
749 * ifaddr list changes happen, so we don't care about the
750 * blockness of the ifaddr processing here.
751 */
752 TAILQ_FOREACH_MUTABLE(ifac, &ifp->if_addrheads[mycpuid],
753 ifa_link, next) {
754 struct ifaddr *ifa = ifac->ifa;
755
756 /* Ignore marker */
757 if (ifa->ifa_addr->sa_family == AF_UNSPEC)
758 continue;
759
760 /* Leave link ifaddr as it is */
761 if (ifa->ifa_addr->sa_family == AF_LINK)
762 continue;
763 #ifdef INET
764 /* XXX: Ugly!! ad hoc just for INET */
765 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET) {
766 struct ifaliasreq ifr;
767 #ifdef IFADDR_DEBUG_VERBOSE
768 int i;
769
770 kprintf("purge in4 addr %p: ", ifa);
771 for (i = 0; i < ncpus; ++i)
772 kprintf("%d ", ifa->ifa_containers[i].ifa_refcnt);
773 kprintf("\n");
774 #endif
775
776 bzero(&ifr, sizeof ifr);
777 ifr.ifra_addr = *ifa->ifa_addr;
778 if (ifa->ifa_dstaddr)
779 ifr.ifra_broadaddr = *ifa->ifa_dstaddr;
780 if (in_control(SIOCDIFADDR, (caddr_t)&ifr, ifp,
781 NULL) == 0)
782 continue;
783 }
784 #endif /* INET */
785 #ifdef INET6
786 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET6) {
787 #ifdef IFADDR_DEBUG_VERBOSE
788 int i;
789
790 kprintf("purge in6 addr %p: ", ifa);
791 for (i = 0; i < ncpus; ++i)
792 kprintf("%d ", ifa->ifa_containers[i].ifa_refcnt);
793 kprintf("\n");
794 #endif
795
796 in6_purgeaddr(ifa);
797 /* ifp_addrhead is already updated */
798 continue;
799 }
800 #endif /* INET6 */
801 ifa_ifunlink(ifa, ifp);
802 ifa_destroy(ifa);
803 }
804
805 lwkt_replymsg(lmsg, 0);
806 }
807
808 void
809 if_purgeaddrs_nolink(struct ifnet *ifp)
810 {
811 struct netmsg_base nmsg;
812 struct lwkt_msg *lmsg = &nmsg.lmsg;
813
814 ASSERT_CANDOMSG_NETISR0(curthread);
815
816 netmsg_init(&nmsg, NULL, &curthread->td_msgport, 0,
817 if_purgeaddrs_nolink_dispatch);
818 lmsg->u.ms_resultp = ifp;
819 lwkt_domsg(netisr_cpuport(0), lmsg, 0);
820 }
821
822 static void
823 ifq_stage_detach_handler(netmsg_t nmsg)
824 {
825 struct ifaltq *ifq = nmsg->lmsg.u.ms_resultp;
826 int q;
827
828 for (q = 0; q < ifq->altq_subq_cnt; ++q) {
829 struct ifaltq_subque *ifsq = &ifq->altq_subq[q];
830 struct ifsubq_stage *stage = ifsq_get_stage(ifsq, mycpuid);
831
832 if (stage->stg_flags & IFSQ_STAGE_FLAG_QUED)
833 ifsq_stage_remove(&ifsubq_stage_heads[mycpuid], stage);
834 }
835 lwkt_replymsg(&nmsg->lmsg, 0);
836 }
837
838 static void
839 ifq_stage_detach(struct ifaltq *ifq)
840 {
841 struct netmsg_base base;
842 int cpu;
843
844 netmsg_init(&base, NULL, &curthread->td_msgport, 0,
845 ifq_stage_detach_handler);
846 base.lmsg.u.ms_resultp = ifq;
847
848 for (cpu = 0; cpu < ncpus; ++cpu)
849 lwkt_domsg(netisr_cpuport(cpu), &base.lmsg, 0);
850 }
851
852 struct netmsg_if_rtdel {
853 struct netmsg_base base;
854 struct ifnet *ifp;
855 };
856
857 static void
858 if_rtdel_dispatch(netmsg_t msg)
859 {
860 struct netmsg_if_rtdel *rmsg = (void *)msg;
861 int i, nextcpu, cpu;
862
863 cpu = mycpuid;
864 for (i = 1; i <= AF_MAX; i++) {
865 struct radix_node_head *rnh;
866
867 if ((rnh = rt_tables[cpu][i]) == NULL)
868 continue;
869 rnh->rnh_walktree(rnh, if_rtdel, rmsg->ifp);
870 }
871
872 nextcpu = cpu + 1;
873 if (nextcpu < ncpus)
874 lwkt_forwardmsg(netisr_cpuport(nextcpu), &rmsg->base.lmsg);
875 else
876 lwkt_replymsg(&rmsg->base.lmsg, 0);
877 }
878
879 /*
880 * Detach an interface, removing it from the
881 * list of "active" interfaces.
882 */
883 void
884 if_detach(struct ifnet *ifp)
885 {
886 struct ifnet_array *old_ifnet_array;
887 struct netmsg_if_rtdel msg;
888 struct domain *dp;
889 int q;
890
891 /* Announce that the interface is gone. */
892 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp);
893 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
894 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL);
895
896 /*
897 * Remove this ifp from ifindex2inet, ifnet queue and ifnet
898 * array before it is whacked.
899 *
900 * Protect ifindex2ifnet, ifnet queue and ifnet array changes
901 * by ifnet lock, so that non-netisr threads could get a
902 * consistent view.
903 */
904 ifnet_lock();
905
906 /*
907 * Remove this ifp from ifindex2ifnet and maybe decrement if_index.
908 */
909 ifindex2ifnet[ifp->if_index] = NULL;
910 while (if_index > 0 && ifindex2ifnet[if_index] == NULL)
911 if_index--;
912
913 /*
914 * Remove this ifp from ifnet queue.
915 */
916 TAILQ_REMOVE(&ifnetlist, ifp, if_link);
917
918 /*
919 * Remove this ifp from ifnet array.
920 */
921 /* Free old ifnet array after sync all netisrs */
922 old_ifnet_array = ifnet_array;
923 ifnet_array = ifnet_array_del(ifp, old_ifnet_array);
924
925 ifnet_unlock();
926
927 /*
928 * Sync all netisrs so that the old ifnet array is no longer
929 * accessed and we can free it safely later on.
930 */
931 netmsg_service_sync();
932 ifnet_array_free(old_ifnet_array);
933
934 /*
935 * Remove routes and flush queues.
936 */
937 crit_enter();
938 #ifdef IFPOLL_ENABLE
939 if (ifp->if_flags & IFF_NPOLLING)
940 ifpoll_deregister(ifp);
941 #endif
942 if_down(ifp);
943
944 /* Decrease the mbuf clusters/jclusters limits increased by us */
945 if (ifp->if_nmbclusters > 0)
946 mcl_inclimit(-ifp->if_nmbclusters);
947 if (ifp->if_nmbjclusters > 0)
948 mjcl_inclimit(-ifp->if_nmbjclusters);
949
950 #ifdef ALTQ
951 if (ifq_is_enabled(&ifp->if_snd))
952 altq_disable(&ifp->if_snd);
953 if (ifq_is_attached(&ifp->if_snd))
954 altq_detach(&ifp->if_snd);
955 #endif
956
957 /*
958 * Clean up all addresses.
959 */
960 ifp->if_lladdr = NULL;
961
962 if_purgeaddrs_nolink(ifp);
963 if (!TAILQ_EMPTY(&ifp->if_addrheads[mycpuid])) {
964 struct ifaddr *ifa;
965
966 ifa = TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa;
967 KASSERT(ifa->ifa_addr->sa_family == AF_LINK,
968 ("non-link ifaddr is left on if_addrheads"));
969
970 ifa_ifunlink(ifa, ifp);
971 ifa_destroy(ifa);
972 KASSERT(TAILQ_EMPTY(&ifp->if_addrheads[mycpuid]),
973 ("there are still ifaddrs left on if_addrheads"));
974 }
975
976 #ifdef INET
977 /*
978 * Remove all IPv4 kernel structures related to ifp.
979 */
980 in_ifdetach(ifp);
981 #endif
982
983 #ifdef INET6
984 /*
985 * Remove all IPv6 kernel structs related to ifp. This should be done
986 * before removing routing entries below, since IPv6 interface direct
987 * routes are expected to be removed by the IPv6-specific kernel API.
988 * Otherwise, the kernel will detect some inconsistency and bark it.
989 */
990 in6_ifdetach(ifp);
991 #endif
992
993 /*
994 * Delete all remaining routes using this interface
995 */
996 netmsg_init(&msg.base, NULL, &curthread->td_msgport, MSGF_PRIORITY,
997 if_rtdel_dispatch);
998 msg.ifp = ifp;
999 rt_domsg_global(&msg.base);
1000
1001 SLIST_FOREACH(dp, &domains, dom_next)
1002 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family])
1003 (*dp->dom_ifdetach)(ifp,
1004 ifp->if_afdata[dp->dom_family]);
1005
1006 kfree(ifp->if_addrheads, M_IFADDR);
1007
1008 lwkt_synchronize_ipiqs("if_detach");
1009 ifq_stage_detach(&ifp->if_snd);
1010
1011 for (q = 0; q < ifp->if_snd.altq_subq_cnt; ++q) {
1012 struct ifaltq_subque *ifsq = &ifp->if_snd.altq_subq[q];
1013
1014 kfree(ifsq->ifsq_ifstart_nmsg, M_LWKTMSG);
1015 kfree(ifsq->ifsq_stage, M_DEVBUF);
1016 }
1017 kfree(ifp->if_snd.altq_subq, M_DEVBUF);
1018
1019 kfree(ifp->if_data_pcpu, M_DEVBUF);
1020
1021 crit_exit();
1022 }
1023
1024 /*
1025 * Create interface group without members
1026 */
1027 struct ifg_group *
1028 if_creategroup(const char *groupname)
1029 {
1030 struct ifg_group *ifg = NULL;
1031
1032 if ((ifg = (struct ifg_group *)kmalloc(sizeof(struct ifg_group),
1033 M_TEMP, M_NOWAIT)) == NULL)
1034 return (NULL);
1035
1036 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group));
1037 ifg->ifg_refcnt = 0;
1038 ifg->ifg_carp_demoted = 0;
1039 TAILQ_INIT(&ifg->ifg_members);
1040 #if NPF > 0
1041 pfi_attach_ifgroup(ifg);
1042 #endif
1043 TAILQ_INSERT_TAIL(&ifg_head, ifg, ifg_next);
1044
1045 return (ifg);
1046 }
1047
1048 /*
1049 * Add a group to an interface
1050 */
1051 int
1052 if_addgroup(struct ifnet *ifp, const char *groupname)
1053 {
1054 struct ifg_list *ifgl;
1055 struct ifg_group *ifg = NULL;
1056 struct ifg_member *ifgm;
1057
1058 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' &&
1059 groupname[strlen(groupname) - 1] <= '9')
1060 return (EINVAL);
1061
1062 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1063 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname))
1064 return (EEXIST);
1065
1066 if ((ifgl = kmalloc(sizeof(*ifgl), M_TEMP, M_NOWAIT)) == NULL)
1067 return (ENOMEM);
1068
1069 if ((ifgm = kmalloc(sizeof(*ifgm), M_TEMP, M_NOWAIT)) == NULL) {
1070 kfree(ifgl, M_TEMP);
1071 return (ENOMEM);
1072 }
1073
1074 TAILQ_FOREACH(ifg, &ifg_head, ifg_next)
1075 if (!strcmp(ifg->ifg_group, groupname))
1076 break;
1077
1078 if (ifg == NULL && (ifg = if_creategroup(groupname)) == NULL) {
1079 kfree(ifgl, M_TEMP);
1080 kfree(ifgm, M_TEMP);
1081 return (ENOMEM);
1082 }
1083
1084 ifg->ifg_refcnt++;
1085 ifgl->ifgl_group = ifg;
1086 ifgm->ifgm_ifp = ifp;
1087
1088 TAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next);
1089 TAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next);
1090
1091 #if NPF > 0
1092 pfi_group_change(groupname);
1093 #endif
1094
1095 return (0);
1096 }
1097
1098 /*
1099 * Remove a group from an interface
1100 */
1101 int
1102 if_delgroup(struct ifnet *ifp, const char *groupname)
1103 {
1104 struct ifg_list *ifgl;
1105 struct ifg_member *ifgm;
1106
1107 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1108 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname))
1109 break;
1110 if (ifgl == NULL)
1111 return (ENOENT);
1112
1113 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next);
1114
1115 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next)
1116 if (ifgm->ifgm_ifp == ifp)
1117 break;
1118
1119 if (ifgm != NULL) {
1120 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifgm_next);
1121 kfree(ifgm, M_TEMP);
1122 }
1123
1124 if (--ifgl->ifgl_group->ifg_refcnt == 0) {
1125 TAILQ_REMOVE(&ifg_head, ifgl->ifgl_group, ifg_next);
1126 #if NPF > 0
1127 pfi_detach_ifgroup(ifgl->ifgl_group);
1128 #endif
1129 kfree(ifgl->ifgl_group, M_TEMP);
1130 }
1131
1132 kfree(ifgl, M_TEMP);
1133
1134 #if NPF > 0
1135 pfi_group_change(groupname);
1136 #endif
1137
1138 return (0);
1139 }
1140
1141 /*
1142 * Stores all groups from an interface in memory pointed
1143 * to by data
1144 */
1145 int
1146 if_getgroup(caddr_t data, struct ifnet *ifp)
1147 {
1148 int len, error;
1149 struct ifg_list *ifgl;
1150 struct ifg_req ifgrq, *ifgp;
1151 struct ifgroupreq *ifgr = (struct ifgroupreq *)data;
1152
1153 if (ifgr->ifgr_len == 0) {
1154 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1155 ifgr->ifgr_len += sizeof(struct ifg_req);
1156 return (0);
1157 }
1158
1159 len = ifgr->ifgr_len;
1160 ifgp = ifgr->ifgr_groups;
1161 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) {
1162 if (len < sizeof(ifgrq))
1163 return (EINVAL);
1164 bzero(&ifgrq, sizeof ifgrq);
1165 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group,
1166 sizeof(ifgrq.ifgrq_group));
1167 if ((error = copyout((caddr_t)&ifgrq, (caddr_t)ifgp,
1168 sizeof(struct ifg_req))))
1169 return (error);
1170 len -= sizeof(ifgrq);
1171 ifgp++;
1172 }
1173
1174 return (0);
1175 }
1176
1177 /*
1178 * Stores all members of a group in memory pointed to by data
1179 */
1180 int
1181 if_getgroupmembers(caddr_t data)
1182 {
1183 struct ifgroupreq *ifgr = (struct ifgroupreq *)data;
1184 struct ifg_group *ifg;
1185 struct ifg_member *ifgm;
1186 struct ifg_req ifgrq, *ifgp;
1187 int len, error;
1188
1189 TAILQ_FOREACH(ifg, &ifg_head, ifg_next)
1190 if (!strcmp(ifg->ifg_group, ifgr->ifgr_name))
1191 break;
1192 if (ifg == NULL)
1193 return (ENOENT);
1194
1195 if (ifgr->ifgr_len == 0) {
1196 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next)
1197 ifgr->ifgr_len += sizeof(ifgrq);
1198 return (0);
1199 }
1200
1201 len = ifgr->ifgr_len;
1202 ifgp = ifgr->ifgr_groups;
1203 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) {
1204 if (len < sizeof(ifgrq))
1205 return (EINVAL);
1206 bzero(&ifgrq, sizeof ifgrq);
1207 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname,
1208 sizeof(ifgrq.ifgrq_member));
1209 if ((error = copyout((caddr_t)&ifgrq, (caddr_t)ifgp,
1210 sizeof(struct ifg_req))))
1211 return (error);
1212 len -= sizeof(ifgrq);
1213 ifgp++;
1214 }
1215
1216 return (0);
1217 }
1218
1219 /*
1220 * Delete Routes for a Network Interface
1221 *
1222 * Called for each routing entry via the rnh->rnh_walktree() call above
1223 * to delete all route entries referencing a detaching network interface.
1224 *
1225 * Arguments:
1226 * rn pointer to node in the routing table
1227 * arg argument passed to rnh->rnh_walktree() - detaching interface
1228 *
1229 * Returns:
1230 * 0 successful
1231 * errno failed - reason indicated
1232 *
1233 */
1234 static int
1235 if_rtdel(struct radix_node *rn, void *arg)
1236 {
1237 struct rtentry *rt = (struct rtentry *)rn;
1238 struct ifnet *ifp = arg;
1239 int err;
1240
1241 if (rt->rt_ifp == ifp) {
1242
1243 /*
1244 * Protect (sorta) against walktree recursion problems
1245 * with cloned routes
1246 */
1247 if (!(rt->rt_flags & RTF_UP))
1248 return (0);
1249
1250 err = rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway,
1251 rt_mask(rt), rt->rt_flags,
1252 NULL);
1253 if (err) {
1254 log(LOG_WARNING, "if_rtdel: error %d\n", err);
1255 }
1256 }
1257
1258 return (0);
1259 }
1260
1261 static __inline boolean_t
1262 ifa_prefer(const struct ifaddr *cur_ifa, const struct ifaddr *old_ifa)
1263 {
1264 if (old_ifa == NULL)
1265 return TRUE;
1266
1267 if ((old_ifa->ifa_ifp->if_flags & IFF_UP) == 0 &&
1268 (cur_ifa->ifa_ifp->if_flags & IFF_UP))
1269 return TRUE;
1270 if ((old_ifa->ifa_flags & IFA_ROUTE) == 0 &&
1271 (cur_ifa->ifa_flags & IFA_ROUTE))
1272 return TRUE;
1273 return FALSE;
1274 }
1275
1276 /*
1277 * Locate an interface based on a complete address.
1278 */
1279 struct ifaddr *
1280 ifa_ifwithaddr(struct sockaddr *addr)
1281 {
1282 const struct ifnet_array *arr;
1283 int i;
1284
1285 arr = ifnet_array_get();
1286 for (i = 0; i < arr->ifnet_count; ++i) {
1287 struct ifnet *ifp = arr->ifnet_arr[i];
1288 struct ifaddr_container *ifac;
1289
1290 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1291 struct ifaddr *ifa = ifac->ifa;
1292
1293 if (ifa->ifa_addr->sa_family != addr->sa_family)
1294 continue;
1295 if (sa_equal(addr, ifa->ifa_addr))
1296 return (ifa);
1297 if ((ifp->if_flags & IFF_BROADCAST) &&
1298 ifa->ifa_broadaddr &&
1299 /* IPv6 doesn't have broadcast */
1300 ifa->ifa_broadaddr->sa_len != 0 &&
1301 sa_equal(ifa->ifa_broadaddr, addr))
1302 return (ifa);
1303 }
1304 }
1305 return (NULL);
1306 }
1307
1308 /*
1309 * Locate the point to point interface with a given destination address.
1310 */
1311 struct ifaddr *
1312 ifa_ifwithdstaddr(struct sockaddr *addr)
1313 {
1314 const struct ifnet_array *arr;
1315 int i;
1316
1317 arr = ifnet_array_get();
1318 for (i = 0; i < arr->ifnet_count; ++i) {
1319 struct ifnet *ifp = arr->ifnet_arr[i];
1320 struct ifaddr_container *ifac;
1321
1322 if (!(ifp->if_flags & IFF_POINTOPOINT))
1323 continue;
1324
1325 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1326 struct ifaddr *ifa = ifac->ifa;
1327
1328 if (ifa->ifa_addr->sa_family != addr->sa_family)
1329 continue;
1330 if (ifa->ifa_dstaddr &&
1331 sa_equal(addr, ifa->ifa_dstaddr))
1332 return (ifa);
1333 }
1334 }
1335 return (NULL);
1336 }
1337
1338 /*
1339 * Find an interface on a specific network. If many, choice
1340 * is most specific found.
1341 */
1342 struct ifaddr *
1343 ifa_ifwithnet(struct sockaddr *addr)
1344 {
1345 struct ifaddr *ifa_maybe = NULL;
1346 u_int af = addr->sa_family;
1347 char *addr_data = addr->sa_data, *cplim;
1348 const struct ifnet_array *arr;
1349 int i;
1350
1351 /*
1352 * AF_LINK addresses can be looked up directly by their index number,
1353 * so do that if we can.
1354 */
1355 if (af == AF_LINK) {
1356 struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr;
1357
1358 if (sdl->sdl_index && sdl->sdl_index <= if_index)
1359 return (ifindex2ifnet[sdl->sdl_index]->if_lladdr);
1360 }
1361
1362 /*
1363 * Scan though each interface, looking for ones that have
1364 * addresses in this address family.
1365 */
1366 arr = ifnet_array_get();
1367 for (i = 0; i < arr->ifnet_count; ++i) {
1368 struct ifnet *ifp = arr->ifnet_arr[i];
1369 struct ifaddr_container *ifac;
1370
1371 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1372 struct ifaddr *ifa = ifac->ifa;
1373 char *cp, *cp2, *cp3;
1374
1375 if (ifa->ifa_addr->sa_family != af)
1376 next: continue;
1377 if (af == AF_INET && ifp->if_flags & IFF_POINTOPOINT) {
1378 /*
1379 * This is a bit broken as it doesn't
1380 * take into account that the remote end may
1381 * be a single node in the network we are
1382 * looking for.
1383 * The trouble is that we don't know the
1384 * netmask for the remote end.
1385 */
1386 if (ifa->ifa_dstaddr != NULL &&
1387 sa_equal(addr, ifa->ifa_dstaddr))
1388 return (ifa);
1389 } else {
1390 /*
1391 * if we have a special address handler,
1392 * then use it instead of the generic one.
1393 */
1394 if (ifa->ifa_claim_addr) {
1395 if ((*ifa->ifa_claim_addr)(ifa, addr)) {
1396 return (ifa);
1397 } else {
1398 continue;
1399 }
1400 }
1401
1402 /*
1403 * Scan all the bits in the ifa's address.
1404 * If a bit dissagrees with what we are
1405 * looking for, mask it with the netmask
1406 * to see if it really matters.
1407 * (A byte at a time)
1408 */
1409 if (ifa->ifa_netmask == 0)
1410 continue;
1411 cp = addr_data;
1412 cp2 = ifa->ifa_addr->sa_data;
1413 cp3 = ifa->ifa_netmask->sa_data;
1414 cplim = ifa->ifa_netmask->sa_len +
1415 (char *)ifa->ifa_netmask;
1416 while (cp3 < cplim)
1417 if ((*cp++ ^ *cp2++) & *cp3++)
1418 goto next; /* next address! */
1419 /*
1420 * If the netmask of what we just found
1421 * is more specific than what we had before
1422 * (if we had one) then remember the new one
1423 * before continuing to search for an even
1424 * better one. If the netmasks are equal,
1425 * we prefer the this ifa based on the result
1426 * of ifa_prefer().
1427 */
1428 if (ifa_maybe == NULL ||
1429 rn_refines((char *)ifa->ifa_netmask,
1430 (char *)ifa_maybe->ifa_netmask) ||
1431 (sa_equal(ifa_maybe->ifa_netmask,
1432 ifa->ifa_netmask) &&
1433 ifa_prefer(ifa, ifa_maybe)))
1434 ifa_maybe = ifa;
1435 }
1436 }
1437 }
1438 return (ifa_maybe);
1439 }
1440
1441 /*
1442 * Find an interface address specific to an interface best matching
1443 * a given address.
1444 */
1445 struct ifaddr *
1446 ifaof_ifpforaddr(struct sockaddr *addr, struct ifnet *ifp)
1447 {
1448 struct ifaddr_container *ifac;
1449 char *cp, *cp2, *cp3;
1450 char *cplim;
1451 struct ifaddr *ifa_maybe = NULL;
1452 u_int af = addr->sa_family;
1453
1454 if (af >= AF_MAX)
1455 return (0);
1456 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1457 struct ifaddr *ifa = ifac->ifa;
1458
1459 if (ifa->ifa_addr->sa_family != af)
1460 continue;
1461 if (ifa_maybe == NULL)
1462 ifa_maybe = ifa;
1463 if (ifa->ifa_netmask == NULL) {
1464 if (sa_equal(addr, ifa->ifa_addr) ||
1465 (ifa->ifa_dstaddr != NULL &&
1466 sa_equal(addr, ifa->ifa_dstaddr)))
1467 return (ifa);
1468 continue;
1469 }
1470 if (ifp->if_flags & IFF_POINTOPOINT) {
1471 if (sa_equal(addr, ifa->ifa_dstaddr))
1472 return (ifa);
1473 } else {
1474 cp = addr->sa_data;
1475 cp2 = ifa->ifa_addr->sa_data;
1476 cp3 = ifa->ifa_netmask->sa_data;
1477 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
1478 for (; cp3 < cplim; cp3++)
1479 if ((*cp++ ^ *cp2++) & *cp3)
1480 break;
1481 if (cp3 == cplim)
1482 return (ifa);
1483 }
1484 }
1485 return (ifa_maybe);
1486 }
1487
1488 /*
1489 * Default action when installing a route with a Link Level gateway.
1490 * Lookup an appropriate real ifa to point to.
1491 * This should be moved to /sys/net/link.c eventually.
1492 */
1493 static void
1494 link_rtrequest(int cmd, struct rtentry *rt)
1495 {
1496 struct ifaddr *ifa;
1497 struct sockaddr *dst;
1498 struct ifnet *ifp;
1499
1500 if (cmd != RTM_ADD || (ifa = rt->rt_ifa) == NULL ||
1501 (ifp = ifa->ifa_ifp) == NULL || (dst = rt_key(rt)) == NULL)
1502 return;
1503 ifa = ifaof_ifpforaddr(dst, ifp);
1504 if (ifa != NULL) {
1505 IFAFREE(rt->rt_ifa);
1506 IFAREF(ifa);
1507 rt->rt_ifa = ifa;
1508 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest)
1509 ifa->ifa_rtrequest(cmd, rt);
1510 }
1511 }
1512
1513 struct netmsg_ifroute {
1514 struct netmsg_base base;
1515 struct ifnet *ifp;
1516 int flag;
1517 int fam;
1518 };
1519
1520 /*
1521 * Mark an interface down and notify protocols of the transition.
1522 */
1523 static void
1524 if_unroute_dispatch(netmsg_t nmsg)
1525 {
1526 struct netmsg_ifroute *msg = (struct netmsg_ifroute *)nmsg;
1527 struct ifnet *ifp = msg->ifp;
1528 int flag = msg->flag, fam = msg->fam;
1529 struct ifaddr_container *ifac;
1530
1531 ifp->if_flags &= ~flag;
1532 getmicrotime(&ifp->if_lastchange);
1533 /*
1534 * The ifaddr processing in the following loop will block,
1535 * however, this function is called in netisr0, in which
1536 * ifaddr list changes happen, so we don't care about the
1537 * blockness of the ifaddr processing here.
1538 */
1539 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1540 struct ifaddr *ifa = ifac->ifa;
1541
1542 /* Ignore marker */
1543 if (ifa->ifa_addr->sa_family == AF_UNSPEC)
1544 continue;
1545
1546 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
1547 kpfctlinput(PRC_IFDOWN, ifa->ifa_addr);
1548 }
1549 ifq_purge_all(&ifp->if_snd);
1550 rt_ifmsg(ifp);
1551
1552 lwkt_replymsg(&nmsg->lmsg, 0);
1553 }
1554
1555 void
1556 if_unroute(struct ifnet *ifp, int flag, int fam)
1557 {
1558 struct netmsg_ifroute msg;
1559
1560 ASSERT_CANDOMSG_NETISR0(curthread);
1561
1562 netmsg_init(&msg.base, NULL, &curthread->td_msgport, 0,
1563 if_unroute_dispatch);
1564 msg.ifp = ifp;
1565 msg.flag = flag;
1566 msg.fam = fam;
1567 lwkt_domsg(netisr_cpuport(0), &msg.base.lmsg, 0);
1568 }
1569
1570 /*
1571 * Mark an interface up and notify protocols of the transition.
1572 */
1573 static void
1574 if_route_dispatch(netmsg_t nmsg)
1575 {
1576 struct netmsg_ifroute *msg = (struct netmsg_ifroute *)nmsg;
1577 struct ifnet *ifp = msg->ifp;
1578 int flag = msg->flag, fam = msg->fam;
1579 struct ifaddr_container *ifac;
1580
1581 ifq_purge_all(&ifp->if_snd);
1582 ifp->if_flags |= flag;
1583 getmicrotime(&ifp->if_lastchange);
1584 /*
1585 * The ifaddr processing in the following loop will block,
1586 * however, this function is called in netisr0, in which
1587 * ifaddr list changes happen, so we don't care about the
1588 * blockness of the ifaddr processing here.
1589 */
1590 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1591 struct ifaddr *ifa = ifac->ifa;
1592
1593 /* Ignore marker */
1594 if (ifa->ifa_addr->sa_family == AF_UNSPEC)
1595 continue;
1596
1597 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
1598 kpfctlinput(PRC_IFUP, ifa->ifa_addr);
1599 }
1600 rt_ifmsg(ifp);
1601 #ifdef INET6
1602 in6_if_up(ifp);
1603 #endif
1604
1605 lwkt_replymsg(&nmsg->lmsg, 0);
1606 }
1607
1608 void
1609 if_route(struct ifnet *ifp, int flag, int fam)
1610 {
1611 struct netmsg_ifroute msg;
1612
1613 ASSERT_CANDOMSG_NETISR0(curthread);
1614
1615 netmsg_init(&msg.base, NULL, &curthread->td_msgport, 0,
1616 if_route_dispatch);
1617 msg.ifp = ifp;
1618 msg.flag = flag;
1619 msg.fam = fam;
1620 lwkt_domsg(netisr_cpuport(0), &msg.base.lmsg, 0);
1621 }
1622
1623 /*
1624 * Mark an interface down and notify protocols of the transition. An
1625 * interface going down is also considered to be a synchronizing event.
1626 * We must ensure that all packet processing related to the interface
1627 * has completed before we return so e.g. the caller can free the ifnet
1628 * structure that the mbufs may be referencing.
1629 *
1630 * NOTE: must be called at splnet or eqivalent.
1631 */
1632 void
1633 if_down(struct ifnet *ifp)
1634 {
1635 if_unroute(ifp, IFF_UP, AF_UNSPEC);
1636 netmsg_service_sync();
1637 }
1638
1639 /*
1640 * Mark an interface up and notify protocols of
1641 * the transition.
1642 * NOTE: must be called at splnet or eqivalent.
1643 */
1644 void
1645 if_up(struct ifnet *ifp)
1646 {
1647 if_route(ifp, IFF_UP, AF_UNSPEC);
1648 }
1649
1650 /*
1651 * Process a link state change.
1652 * NOTE: must be called at splsoftnet or equivalent.
1653 */
1654 void
1655 if_link_state_change(struct ifnet *ifp)
1656 {
1657 int link_state = ifp->if_link_state;
1658
1659 rt_ifmsg(ifp);
1660 devctl_notify("IFNET", ifp->if_xname,
1661 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN", NULL);
1662 }
1663
1664 /*
1665 * Handle interface watchdog timer routines. Called
1666 * from softclock, we decrement timers (if set) and
1667 * call the appropriate interface routine on expiration.
1668 */
1669 static void
1670 if_slowtimo_dispatch(netmsg_t nmsg)
1671 {
1672 struct globaldata *gd = mycpu;
1673 const struct ifnet_array *arr;
1674 int i;
1675
1676 ASSERT_IN_NETISR(0);
1677
1678 crit_enter_gd(gd);
1679 lwkt_replymsg(&nmsg->lmsg, 0); /* reply ASAP */
1680 crit_exit_gd(gd);
1681
1682 arr = ifnet_array_get();
1683 for (i = 0; i < arr->ifnet_count; ++i) {
1684 struct ifnet *ifp = arr->ifnet_arr[i];
1685
1686 crit_enter_gd(gd);
1687
1688 if (if_stats_compat) {
1689 IFNET_STAT_GET(ifp, ipackets, ifp->if_ipackets);
1690 IFNET_STAT_GET(ifp, ierrors, ifp->if_ierrors);
1691 IFNET_STAT_GET(ifp, opackets, ifp->if_opackets);
1692 IFNET_STAT_GET(ifp, oerrors, ifp->if_oerrors);
1693 IFNET_STAT_GET(ifp, collisions, ifp->if_collisions);
1694 IFNET_STAT_GET(ifp, ibytes, ifp->if_ibytes);
1695 IFNET_STAT_GET(ifp, obytes, ifp->if_obytes);
1696 IFNET_STAT_GET(ifp, imcasts, ifp->if_imcasts);
1697 IFNET_STAT_GET(ifp, omcasts, ifp->if_omcasts);
1698 IFNET_STAT_GET(ifp, iqdrops, ifp->if_iqdrops);
1699 IFNET_STAT_GET(ifp, noproto, ifp->if_noproto);
1700 IFNET_STAT_GET(ifp, oqdrops, ifp->if_oqdrops);
1701 }
1702
1703 if (ifp->if_timer == 0 || --ifp->if_timer) {
1704 crit_exit_gd(gd);
1705 continue;
1706 }
1707 if (ifp->if_watchdog) {
1708 if (ifnet_tryserialize_all(ifp)) {
1709 (*ifp->if_watchdog)(ifp);
1710 ifnet_deserialize_all(ifp);
1711 } else {
1712 /* try again next timeout */
1713 ++ifp->if_timer;
1714 }
1715 }
1716
1717 crit_exit_gd(gd);
1718 }
1719
1720 callout_reset(&if_slowtimo_timer, hz / IFNET_SLOWHZ, if_slowtimo, NULL);
1721 }
1722
1723 static void
1724 if_slowtimo(void *arg __unused)
1725 {
1726 struct lwkt_msg *lmsg = &if_slowtimo_netmsg.lmsg;
1727
1728 KASSERT(mycpuid == 0, ("not on cpu0"));
1729 crit_enter();
1730 if (lmsg->ms_flags & MSGF_DONE)
1731 lwkt_sendmsg_oncpu(netisr_cpuport(0), lmsg);
1732 crit_exit();
1733 }
1734
1735 /*
1736 * Map interface name to
1737 * interface structure pointer.
1738 */
1739 struct ifnet *
1740 ifunit(const char *name)
1741 {
1742 struct ifnet *ifp;
1743
1744 /*
1745 * Search all the interfaces for this name/number
1746 */
1747 KASSERT(mtx_owned(&ifnet_mtx), ("ifnet is not locked"));
1748
1749 TAILQ_FOREACH(ifp, &ifnetlist, if_link) {
1750 if (strncmp(ifp->if_xname, name, IFNAMSIZ) == 0)
1751 break;
1752 }
1753 return (ifp);
1754 }
1755
1756 struct ifnet *
1757 ifunit_netisr(const char *name)
1758 {
1759 const struct ifnet_array *arr;
1760 int i;
1761
1762 /*
1763 * Search all the interfaces for this name/number
1764 */
1765
1766 arr = ifnet_array_get();
1767 for (i = 0; i < arr->ifnet_count; ++i) {
1768 struct ifnet *ifp = arr->ifnet_arr[i];
1769
1770 if (strncmp(ifp->if_xname, name, IFNAMSIZ) == 0)
1771 return ifp;
1772 }
1773 return NULL;
1774 }
1775
1776 /*
1777 * Interface ioctls.
1778 */
1779 int
1780 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct ucred *cred)
1781 {
1782 struct ifnet *ifp;
1783 struct ifreq *ifr;
1784 struct ifstat *ifs;
1785 int error;
1786 short oif_flags;
1787 int new_flags;
1788 #ifdef COMPAT_43
1789 int ocmd;
1790 #endif
1791 size_t namelen, onamelen;
1792 char new_name[IFNAMSIZ];
1793 struct ifaddr *ifa;
1794 struct sockaddr_dl *sdl;
1795
1796 switch (cmd) {
1797 case SIOCGIFCONF:
1798 case OSIOCGIFCONF:
1799 return (ifconf(cmd, data, cred));
1800 default:
1801 break;
1802 }
1803
1804 ifr = (struct ifreq *)data;
1805
1806 switch (cmd) {
1807 case SIOCIFCREATE:
1808 case SIOCIFCREATE2:
1809 if ((error = priv_check_cred(cred, PRIV_ROOT, 0)) != 0)
1810 return (error);
1811 return (if_clone_create(ifr->ifr_name, sizeof(ifr->ifr_name),
1812 cmd == SIOCIFCREATE2 ? ifr->ifr_data : NULL));
1813 case SIOCIFDESTROY:
1814 if ((error = priv_check_cred(cred, PRIV_ROOT, 0)) != 0)
1815 return (error);
1816 return (if_clone_destroy(ifr->ifr_name));
1817 case SIOCIFGCLONERS:
1818 return (if_clone_list((struct if_clonereq *)data));
1819 default:
1820 break;
1821 }
1822
1823 /*
1824 * Nominal ioctl through interface, lookup the ifp and obtain a
1825 * lock to serialize the ifconfig ioctl operation.
1826 */
1827 ifnet_lock();
1828
1829 ifp = ifunit(ifr->ifr_name);
1830 if (ifp == NULL) {
1831 ifnet_unlock();
1832 return (ENXIO);
1833 }
1834 error = 0;
1835
1836 switch (cmd) {
1837 case SIOCGIFINDEX:
1838 ifr->ifr_index = ifp->if_index;
1839 break;
1840
1841 case SIOCGIFFLAGS:
1842 ifr->ifr_flags = ifp->if_flags;
1843 ifr->ifr_flagshigh = ifp->if_flags >> 16;
1844 break;
1845
1846 case SIOCGIFCAP:
1847 ifr->ifr_reqcap = ifp->if_capabilities;
1848 ifr->ifr_curcap = ifp->if_capenable;
1849 break;
1850
1851 case SIOCGIFMETRIC:
1852 ifr->ifr_metric = ifp->if_metric;
1853 break;
1854
1855 case SIOCGIFMTU:
1856 ifr->ifr_mtu = ifp->if_mtu;
1857 break;
1858
1859 case SIOCGIFTSOLEN:
1860 ifr->ifr_tsolen = ifp->if_tsolen;
1861 break;
1862
1863 case SIOCGIFDATA:
1864 error = copyout((caddr_t)&ifp->if_data, ifr->ifr_data,
1865 sizeof(ifp->if_data));
1866 break;
1867
1868 case SIOCGIFPHYS:
1869 ifr->ifr_phys = ifp->if_physical;
1870 break;
1871
1872 case SIOCGIFPOLLCPU:
1873 ifr->ifr_pollcpu = -1;
1874 break;
1875
1876 case SIOCSIFPOLLCPU:
1877 break;
1878
1879 case SIOCSIFFLAGS:
1880 error = priv_check_cred(cred, PRIV_ROOT, 0);
1881 if (error)
1882 break;
1883 new_flags = (ifr->ifr_flags & 0xffff) |
1884 (ifr->ifr_flagshigh << 16);
1885 if (ifp->if_flags & IFF_SMART) {
1886 /* Smart drivers twiddle their own routes */
1887 } else if (ifp->if_flags & IFF_UP &&
1888 (new_flags & IFF_UP) == 0) {
1889 crit_enter();
1890 if_down(ifp);
1891 crit_exit();
1892 } else if (new_flags & IFF_UP &&
1893 (ifp->if_flags & IFF_UP) == 0) {
1894 crit_enter();
1895 if_up(ifp);
1896 crit_exit();
1897 }
1898
1899 #ifdef IFPOLL_ENABLE
1900 if ((new_flags ^ ifp->if_flags) & IFF_NPOLLING) {
1901 if (new_flags & IFF_NPOLLING)
1902 ifpoll_register(ifp);
1903 else
1904 ifpoll_deregister(ifp);
1905 }
1906 #endif
1907
1908 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
1909 (new_flags &~ IFF_CANTCHANGE);
1910 if (new_flags & IFF_PPROMISC) {
1911 /* Permanently promiscuous mode requested */
1912 ifp->if_flags |= IFF_PROMISC;
1913 } else if (ifp->if_pcount == 0) {
1914 ifp->if_flags &= ~IFF_PROMISC;
1915 }
1916 if (ifp->if_ioctl) {
1917 ifnet_serialize_all(ifp);
1918 ifp->if_ioctl(ifp, cmd, data, cred);
1919 ifnet_deserialize_all(ifp);
1920 }
1921 getmicrotime(&ifp->if_lastchange);
1922 break;
1923
1924 case SIOCSIFCAP:
1925 error = priv_check_cred(cred, PRIV_ROOT, 0);
1926 if (error)
1927 break;
1928 if (ifr->ifr_reqcap & ~ifp->if_capabilities) {
1929 error = EINVAL;
1930 break;
1931 }
1932 ifnet_serialize_all(ifp);
1933 ifp->if_ioctl(ifp, cmd, data, cred);
1934 ifnet_deserialize_all(ifp);
1935 break;
1936
1937 case SIOCSIFNAME:
1938 error = priv_check_cred(cred, PRIV_ROOT, 0);
1939 if (error)
1940 break;
1941 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL);
1942 if (error)
1943 break;
1944 if (new_name[0] == '\0') {
1945 error = EINVAL;
1946 break;
1947 }
1948 if (ifunit(new_name) != NULL) {
1949 error = EEXIST;
1950 break;
1951 }
1952
1953 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp);
1954
1955 /* Announce the departure of the interface. */
1956 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
1957
1958 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname));
1959 ifa = TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa;
1960 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
1961 namelen = strlen(new_name);
1962 onamelen = sdl->sdl_nlen;
1963 /*
1964 * Move the address if needed. This is safe because we
1965 * allocate space for a name of length IFNAMSIZ when we
1966 * create this in if_attach().
1967 */
1968 if (namelen != onamelen) {
1969 bcopy(sdl->sdl_data + onamelen,
1970 sdl->sdl_data + namelen, sdl->sdl_alen);
1971 }
1972 bcopy(new_name, sdl->sdl_data, namelen);
1973 sdl->sdl_nlen = namelen;
1974 sdl = (struct sockaddr_dl *)ifa->ifa_netmask;
1975 bzero(sdl->sdl_data, onamelen);
1976 while (namelen != 0)
1977 sdl->sdl_data[--namelen] = 0xff;
1978
1979 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp);
1980
1981 /* Announce the return of the interface. */
1982 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
1983 break;
1984
1985 case SIOCSIFMETRIC:
1986 error = priv_check_cred(cred, PRIV_ROOT, 0);
1987 if (error)
1988 break;
1989 ifp->if_metric = ifr->ifr_metric;
1990 getmicrotime(&ifp->if_lastchange);
1991 break;
1992
1993 case SIOCSIFPHYS:
1994 error = priv_check_cred(cred, PRIV_ROOT, 0);
1995 if (error)
1996 break;
1997 if (ifp->if_ioctl == NULL) {
1998 error = EOPNOTSUPP;
1999 break;
2000 }
2001 ifnet_serialize_all(ifp);
2002 error = ifp->if_ioctl(ifp, cmd, data, cred);
2003 ifnet_deserialize_all(ifp);
2004 if (error == 0)
2005 getmicrotime(&ifp->if_lastchange);
2006 break;
2007
2008 case SIOCSIFMTU:
2009 {
2010 u_long oldmtu = ifp->if_mtu;
2011
2012 error = priv_check_cred(cred, PRIV_ROOT, 0);
2013 if (error)
2014 break;
2015 if (ifp->if_ioctl == NULL) {
2016 error = EOPNOTSUPP;
2017 break;
2018 }
2019 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU) {
2020 error = EINVAL;
2021 break;
2022 }
2023 ifnet_serialize_all(ifp);
2024 error = ifp->if_ioctl(ifp, cmd, data, cred);
2025 ifnet_deserialize_all(ifp);
2026 if (error == 0) {
2027 getmicrotime(&ifp->if_lastchange);
2028 rt_ifmsg(ifp);
2029 }
2030 /*
2031 * If the link MTU changed, do network layer specific procedure.
2032 */
2033 if (ifp->if_mtu != oldmtu) {
2034 #ifdef INET6
2035 nd6_setmtu(ifp);
2036 #endif
2037 }
2038 break;
2039 }
2040
2041 case SIOCSIFTSOLEN:
2042 error = priv_check_cred(cred, PRIV_ROOT, 0);
2043 if (error)
2044 break;
2045
2046 /* XXX need driver supplied upper limit */
2047 if (ifr->ifr_tsolen <= 0) {
2048 error = EINVAL;
2049 break;
2050 }
2051 ifp->if_tsolen = ifr->ifr_tsolen;
2052 break;
2053
2054 case SIOCADDMULTI:
2055 case SIOCDELMULTI:
2056 error = priv_check_cred(cred, PRIV_ROOT, 0);
2057 if (error)
2058 break;
2059
2060 /* Don't allow group membership on non-multicast interfaces. */
2061 if ((ifp->if_flags & IFF_MULTICAST) == 0) {
2062 error = EOPNOTSUPP;
2063 break;
2064 }
2065
2066 /* Don't let users screw up protocols' entries. */
2067 if (ifr->ifr_addr.sa_family != AF_LINK) {
2068 error = EINVAL;
2069 break;
2070 }
2071
2072 if (cmd == SIOCADDMULTI) {
2073 struct ifmultiaddr *ifma;
2074 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma);
2075 } else {
2076 error = if_delmulti(ifp, &ifr->ifr_addr);
2077 }
2078 if (error == 0)
2079 getmicrotime(&ifp->if_lastchange);
2080 break;
2081
2082 case SIOCSIFPHYADDR:
2083 case SIOCDIFPHYADDR:
2084 #ifdef INET6
2085 case SIOCSIFPHYADDR_IN6:
2086 #endif
2087 case SIOCSLIFPHYADDR:
2088 case SIOCSIFMEDIA:
2089 case SIOCSIFGENERIC:
2090 error = priv_check_cred(cred, PRIV_ROOT, 0);
2091 if (error)
2092 break;
2093 if (ifp->if_ioctl == 0) {
2094 error = EOPNOTSUPP;
2095 break;
2096 }
2097 ifnet_serialize_all(ifp);
2098 error = ifp->if_ioctl(ifp, cmd, data, cred);
2099 ifnet_deserialize_all(ifp);
2100 if (error == 0)
2101 getmicrotime(&ifp->if_lastchange);
2102 break;
2103
2104 case SIOCGIFSTATUS:
2105 ifs = (struct ifstat *)data;
2106 ifs->ascii[0] = '\0';
2107 /* fall through */
2108 case SIOCGIFPSRCADDR:
2109 case SIOCGIFPDSTADDR:
2110 case SIOCGLIFPHYADDR:
2111 case SIOCGIFMEDIA:
2112 case SIOCGIFGENERIC:
2113 if (ifp->if_ioctl == NULL) {
2114 error = EOPNOTSUPP;
2115 break;
2116 }
2117 ifnet_serialize_all(ifp);
2118 error = ifp->if_ioctl(ifp, cmd, data, cred);
2119 ifnet_deserialize_all(ifp);
2120 break;
2121
2122 case SIOCSIFLLADDR:
2123 error = priv_check_cred(cred, PRIV_ROOT, 0);
2124 if (error)
2125 break;
2126 error = if_setlladdr(ifp, ifr->ifr_addr.sa_data,
2127 ifr->ifr_addr.sa_len);
2128 EVENTHANDLER_INVOKE(iflladdr_event, ifp);
2129 break;
2130
2131 default:
2132 oif_flags = ifp->if_flags;
2133 if (so->so_proto == 0) {
2134 error = EOPNOTSUPP;
2135 break;
2136 }
2137 #ifndef COMPAT_43
2138 error = so_pru_control_direct(so, cmd, data, ifp);
2139 #else
2140 ocmd = cmd;
2141
2142 switch (cmd) {
2143 case SIOCSIFDSTADDR:
2144 case SIOCSIFADDR:
2145 case SIOCSIFBRDADDR:
2146 case SIOCSIFNETMASK:
2147 #if BYTE_ORDER != BIG_ENDIAN
2148 if (ifr->ifr_addr.sa_family == 0 &&
2149 ifr->ifr_addr.sa_len < 16) {
2150 ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len;
2151 ifr->ifr_addr.sa_len = 16;
2152 }
2153 #else
2154 if (ifr->ifr_addr.sa_len == 0)
2155 ifr->ifr_addr.sa_len = 16;
2156 #endif
2157 break;
2158 case OSIOCGIFADDR:
2159 cmd = SIOCGIFADDR;
2160 break;
2161 case OSIOCGIFDSTADDR:
2162 cmd = SIOCGIFDSTADDR;
2163 break;
2164 case OSIOCGIFBRDADDR:
2165 cmd = SIOCGIFBRDADDR;
2166 break;
2167 case OSIOCGIFNETMASK:
2168 cmd = SIOCGIFNETMASK;
2169 break;
2170 default:
2171 break;
2172 }
2173
2174 error = so_pru_control_direct(so, cmd, data, ifp);
2175
2176 switch (ocmd) {
2177 case OSIOCGIFADDR:
2178 case OSIOCGIFDSTADDR:
2179 case OSIOCGIFBRDADDR:
2180 case OSIOCGIFNETMASK:
2181 *(u_short *)&ifr->ifr_addr = ifr->ifr_addr.sa_family;
2182 break;
2183 }
2184 #endif /* COMPAT_43 */
2185
2186 if ((oif_flags ^ ifp->if_flags) & IFF_UP) {
2187 #ifdef INET6
2188 DELAY(100);/* XXX: temporary workaround for fxp issue*/
2189 if (ifp->if_flags & IFF_UP) {
2190 crit_enter();
2191 in6_if_up(ifp);
2192 crit_exit();
2193 }
2194 #endif
2195 }
2196 break;
2197 }
2198
2199 ifnet_unlock();
2200 return (error);
2201 }
2202
2203 /*
2204 * Set/clear promiscuous mode on interface ifp based on the truth value
2205 * of pswitch. The calls are reference counted so that only the first
2206 * "on" request actually has an effect, as does the final "off" request.
2207 * Results are undefined if the "off" and "on" requests are not matched.
2208 */
2209 int
2210 ifpromisc(struct ifnet *ifp, int pswitch)
2211 {
2212 struct ifreq ifr;
2213 int error;
2214 int oldflags;
2215
2216 oldflags = ifp->if_flags;
2217 if (ifp->if_flags & IFF_PPROMISC) {
2218 /* Do nothing if device is in permanently promiscuous mode */
2219 ifp->if_pcount += pswitch ? 1 : -1;
2220 return (0);
2221 }
2222 if (pswitch) {
2223 /*
2224 * If the device is not configured up, we cannot put it in
2225 * promiscuous mode.
2226 */
2227 if ((ifp->if_flags & IFF_UP) == 0)
2228 return (ENETDOWN);
2229 if (ifp->if_pcount++ != 0)
2230 return (0);
2231 ifp->if_flags |= IFF_PROMISC;
2232 log(LOG_INFO, "%s: promiscuous mode enabled\n",
2233 ifp->if_xname);
2234 } else {
2235 if (--ifp->if_pcount > 0)
2236 return (0);
2237 ifp->if_flags &= ~IFF_PROMISC;
2238 log(LOG_INFO, "%s: promiscuous mode disabled\n",
2239 ifp->if_xname);
2240 }
2241 ifr.ifr_flags = ifp->if_flags;
2242 ifr.ifr_flagshigh = ifp->if_flags >> 16;
2243 ifnet_serialize_all(ifp);
2244 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, NULL);
2245 ifnet_deserialize_all(ifp);
2246 if (error == 0)
2247 rt_ifmsg(ifp);
2248 else
2249 ifp->if_flags = oldflags;
2250 return error;
2251 }
2252
2253 /*
2254 * Return interface configuration
2255 * of system. List may be used
2256 * in later ioctl's (above) to get
2257 * other information.
2258 */
2259 static int
2260 ifconf(u_long cmd, caddr_t data, struct ucred *cred)
2261 {
2262 struct ifconf *ifc = (struct ifconf *)data;
2263 struct ifnet *ifp;
2264 struct sockaddr *sa;
2265 struct ifreq ifr, *ifrp;
2266 int space = ifc->ifc_len, error = 0;
2267
2268 ifrp = ifc->ifc_req;
2269
2270 ifnet_lock();
2271 TAILQ_FOREACH(ifp, &ifnetlist, if_link) {
2272 struct ifaddr_container *ifac, *ifac_mark;
2273 struct ifaddr_marker mark;
2274 struct ifaddrhead *head;
2275 int addrs;
2276
2277 if (space <= sizeof ifr)
2278 break;
2279
2280 /*
2281 * Zero the stack declared structure first to prevent
2282 * memory disclosure.
2283 */
2284 bzero(&ifr, sizeof(ifr));
2285 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name))
2286 >= sizeof(ifr.ifr_name)) {
2287 error = ENAMETOOLONG;
2288 break;
2289 }
2290
2291 /*
2292 * Add a marker, since copyout() could block and during that
2293 * period the list could be changed. Inserting the marker to
2294 * the header of the list will not cause trouble for the code
2295 * assuming that the first element of the list is AF_LINK; the
2296 * marker will be moved to the next position w/o blocking.
2297 */
2298 ifa_marker_init(&mark, ifp);
2299 ifac_mark = &mark.ifac;
2300 head = &ifp->if_addrheads[mycpuid];
2301
2302 addrs = 0;
2303 TAILQ_INSERT_HEAD(head, ifac_mark, ifa_link);
2304 while ((ifac = TAILQ_NEXT(ifac_mark, ifa_link)) != NULL) {
2305 struct ifaddr *ifa = ifac->ifa;
2306
2307 TAILQ_REMOVE(head, ifac_mark, ifa_link);
2308 TAILQ_INSERT_AFTER(head, ifac, ifac_mark, ifa_link);
2309
2310 /* Ignore marker */
2311 if (ifa->ifa_addr->sa_family == AF_UNSPEC)
2312 continue;
2313
2314 if (space <= sizeof ifr)
2315 break;
2316 sa = ifa->ifa_addr;
2317 if (cred->cr_prison &&
2318 prison_if(cred, sa))
2319 continue;
2320 addrs++;
2321 /*
2322 * Keep a reference on this ifaddr, so that it will
2323 * not be destroyed when its address is copied to
2324 * the userland, which could block.
2325 */
2326 IFAREF(ifa);
2327 #ifdef COMPAT_43
2328 if (cmd == OSIOCGIFCONF) {
2329 struct osockaddr *osa =
2330 (struct osockaddr *)&ifr.ifr_addr;
2331 ifr.ifr_addr = *sa;
2332 osa->sa_family = sa->sa_family;
2333 error = copyout(&ifr, ifrp, sizeof ifr);
2334 ifrp++;
2335 } else
2336 #endif
2337 if (sa->sa_len <= sizeof(*sa)) {
2338 ifr.ifr_addr = *sa;
2339 error = copyout(&ifr, ifrp, sizeof ifr);
2340 ifrp++;
2341 } else {
2342 if (space < (sizeof ifr) + sa->sa_len -
2343 sizeof(*sa)) {
2344 IFAFREE(ifa);
2345 break;
2346 }
2347 space -= sa->sa_len - sizeof(*sa);
2348 error = copyout(&ifr, ifrp,
2349 sizeof ifr.ifr_name);
2350 if (error == 0)
2351 error = copyout(sa, &ifrp->ifr_addr,
2352 sa->sa_len);
2353 ifrp = (struct ifreq *)
2354 (sa->sa_len + (caddr_t)&ifrp->ifr_addr);
2355 }
2356 IFAFREE(ifa);
2357 if (error)
2358 break;
2359 space -= sizeof ifr;
2360 }
2361 TAILQ_REMOVE(head, ifac_mark, ifa_link);
2362 if (error)
2363 break;
2364 if (!addrs) {
2365 bzero(&ifr.ifr_addr, sizeof ifr.ifr_addr);
2366 error = copyout(&ifr, ifrp, sizeof ifr);
2367 if (error)
2368 break;
2369 space -= sizeof ifr;
2370 ifrp++;
2371 }
2372 }
2373 ifnet_unlock();
2374
2375 ifc->ifc_len -= space;
2376 return (error);
2377 }
2378
2379 /*
2380 * Just like if_promisc(), but for all-multicast-reception mode.
2381 */
2382 int
2383 if_allmulti(struct ifnet *ifp, int onswitch)
2384 {
2385 int error = 0;
2386 struct ifreq ifr;
2387
2388 crit_enter();
2389
2390 if (onswitch) {
2391 if (ifp->if_amcount++ == 0) {
2392 ifp->if_flags |= IFF_ALLMULTI;
2393 ifr.ifr_flags = ifp->if_flags;
2394 ifr.ifr_flagshigh = ifp->if_flags >> 16;
2395 ifnet_serialize_all(ifp);
2396 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
2397 NULL);
2398 ifnet_deserialize_all(ifp);
2399 }
2400 } else {
2401 if (ifp->if_amcount > 1) {
2402 ifp->if_amcount--;
2403 } else {
2404 ifp->if_amcount = 0;
2405 ifp->if_flags &= ~IFF_ALLMULTI;
2406 ifr.ifr_flags = ifp->if_flags;
2407 ifr.ifr_flagshigh = ifp->if_flags >> 16;
2408 ifnet_serialize_all(ifp);
2409 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
2410 NULL);
2411 ifnet_deserialize_all(ifp);
2412 }
2413 }
2414
2415 crit_exit();
2416
2417 if (error == 0)
2418 rt_ifmsg(ifp);
2419 return error;
2420 }
2421
2422 /*
2423 * Add a multicast listenership to the interface in question.
2424 * The link layer provides a routine which converts
2425 */
2426 int
2427 if_addmulti_serialized(struct ifnet *ifp, struct sockaddr *sa,
2428 struct ifmultiaddr **retifma)
2429 {
2430 struct sockaddr *llsa, *dupsa;
2431 int error;
2432 struct ifmultiaddr *ifma;
2433
2434 ASSERT_IFNET_SERIALIZED_ALL(ifp);
2435
2436 /*
2437 * If the matching multicast address already exists
2438 * then don't add a new one, just add a reference
2439 */
2440 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
2441 if (sa_equal(sa, ifma->ifma_addr)) {
2442 ifma->ifma_refcount++;
2443 if (retifma)
2444 *retifma = ifma;
2445 return 0;
2446 }
2447 }
2448
2449 /*
2450 * Give the link layer a chance to accept/reject it, and also
2451 * find out which AF_LINK address this maps to, if it isn't one
2452 * already.
2453 */
2454 if (ifp->if_resolvemulti) {
2455 error = ifp->if_resolvemulti(ifp, &llsa, sa);
2456 if (error)
2457 return error;
2458 } else {
2459 llsa = NULL;
2460 }
2461
2462 ifma = kmalloc(sizeof *ifma, M_IFMADDR, M_INTWAIT);
2463 dupsa = kmalloc(sa->sa_len, M_IFMADDR, M_INTWAIT);
2464 bcopy(sa, dupsa, sa->sa_len);
2465
2466 ifma->ifma_addr = dupsa;
2467 ifma->ifma_lladdr = llsa;
2468 ifma->ifma_ifp = ifp;
2469 ifma->ifma_refcount = 1;
2470 ifma->ifma_protospec = NULL;
2471 rt_newmaddrmsg(RTM_NEWMADDR, ifma);
2472
2473 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
2474 if (retifma)
2475 *retifma = ifma;
2476
2477 if (llsa != NULL) {
2478 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
2479 if (sa_equal(ifma->ifma_addr, llsa))
2480 break;
2481 }
2482 if (ifma) {
2483 ifma->ifma_refcount++;
2484 } else {
2485 ifma = kmalloc(sizeof *ifma, M_IFMADDR, M_INTWAIT);
2486 dupsa = kmalloc(llsa->sa_len, M_IFMADDR, M_INTWAIT);
2487 bcopy(llsa, dupsa, llsa->sa_len);
2488 ifma->ifma_addr = dupsa;
2489 ifma->ifma_ifp = ifp;
2490 ifma->ifma_refcount = 1;
2491 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
2492 }
2493 }
2494 /*
2495 * We are certain we have added something, so call down to the
2496 * interface to let them know about it.
2497 */
2498 if (ifp->if_ioctl)
2499 ifp->if_ioctl(ifp, SIOCADDMULTI, 0, NULL);
2500
2501 return 0;
2502 }
2503
2504 int
2505 if_addmulti(struct ifnet *ifp, struct sockaddr *sa,
2506 struct ifmultiaddr **retifma)
2507 {
2508 int error;
2509
2510 ifnet_serialize_all(ifp);
2511 error = if_addmulti_serialized(ifp, sa, retifma);
2512 ifnet_deserialize_all(ifp);
2513
2514 return error;
2515 }
2516
2517 /*
2518 * Remove a reference to a multicast address on this interface. Yell
2519 * if the request does not match an existing membership.
2520 */
2521 static int
2522 if_delmulti_serialized(struct ifnet *ifp, struct sockaddr *sa)
2523 {
2524 struct ifmultiaddr *ifma;
2525
2526 ASSERT_IFNET_SERIALIZED_ALL(ifp);
2527
2528 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
2529 if (sa_equal(sa, ifma->ifma_addr))
2530 break;
2531 if (ifma == NULL)
2532 return ENOENT;
2533
2534 if (ifma->ifma_refcount > 1) {
2535 ifma->ifma_refcount--;
2536 return 0;
2537 }
2538
2539 rt_newmaddrmsg(RTM_DELMADDR, ifma);
2540 sa = ifma->ifma_lladdr;
2541 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link);
2542 /*
2543 * Make sure the interface driver is notified
2544 * in the case of a link layer mcast group being left.
2545 */
2546 if (ifma->ifma_addr->sa_family == AF_LINK && sa == NULL)
2547 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, NULL);
2548 kfree(ifma->ifma_addr, M_IFMADDR);
2549 kfree(ifma, M_IFMADDR);
2550 if (sa == NULL)
2551 return 0;
2552
2553 /*
2554 * Now look for the link-layer address which corresponds to
2555 * this network address. It had been squirreled away in
2556 * ifma->ifma_lladdr for this purpose (so we don't have
2557 * to call ifp->if_resolvemulti() again), and we saved that
2558 * value in sa above. If some nasty deleted the
2559 * link-layer address out from underneath us, we can deal because
2560 * the address we stored was is not the same as the one which was
2561 * in the record for the link-layer address. (So we don't complain
2562 * in that case.)
2563 */
2564 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
2565 if (sa_equal(sa, ifma->ifma_addr))
2566 break;
2567 if (ifma == NULL)
2568 return 0;
2569
2570 if (ifma->ifma_refcount > 1) {
2571 ifma->ifma_refcount--;
2572 return 0;
2573 }
2574
2575 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link);
2576 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, NULL);
2577 kfree(ifma->ifma_addr, M_IFMADDR);
2578 kfree(sa, M_IFMADDR);
2579 kfree(ifma, M_IFMADDR);
2580
2581 return 0;
2582 }
2583
2584 int
2585 if_delmulti(struct ifnet *ifp, struct sockaddr *sa)
2586 {
2587 int error;
2588
2589 ifnet_serialize_all(ifp);
2590 error = if_delmulti_serialized(ifp, sa);
2591 ifnet_deserialize_all(ifp);
2592
2593 return error;
2594 }
2595
2596 /*
2597 * Delete all multicast group membership for an interface.
2598 * Should be used to quickly flush all multicast filters.
2599 */
2600 void
2601 if_delallmulti_serialized(struct ifnet *ifp)
2602 {
2603 struct ifmultiaddr *ifma, mark;
2604 struct sockaddr sa;
2605
2606 ASSERT_IFNET_SERIALIZED_ALL(ifp);
2607
2608 bzero(&sa, sizeof(sa));
2609 sa.sa_family = AF_UNSPEC;
2610 sa.sa_len = sizeof(sa);
2611
2612 bzero(&mark, sizeof(mark));
2613 mark.ifma_addr = &sa;
2614
2615 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, &mark, ifma_link);
2616 while ((ifma = TAILQ_NEXT(&mark, ifma_link)) != NULL) {
2617 TAILQ_REMOVE(&ifp->if_multiaddrs, &mark, ifma_link);
2618 TAILQ_INSERT_AFTER(&ifp->if_multiaddrs, ifma, &mark,
2619 ifma_link);
2620
2621 if (ifma->ifma_addr->sa_family == AF_UNSPEC)
2622 continue;
2623
2624 if_delmulti_serialized(ifp, ifma->ifma_addr);
2625 }
2626 TAILQ_REMOVE(&ifp->if_multiaddrs, &mark, ifma_link);
2627 }
2628
2629
2630 /*
2631 * Set the link layer address on an interface.
2632 *
2633 * At this time we only support certain types of interfaces,
2634 * and we don't allow the length of the address to change.
2635 */
2636 int
2637 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len)
2638 {
2639 struct sockaddr_dl *sdl;
2640 struct ifreq ifr;
2641
2642 sdl = IF_LLSOCKADDR(ifp);
2643 if (sdl == NULL)
2644 return (EINVAL);
2645 if (len != sdl->sdl_alen) /* don't allow length to change */
2646 return (EINVAL);
2647 switch (ifp->if_type) {
2648 case IFT_ETHER: /* these types use struct arpcom */
2649 case IFT_XETHER:
2650 case IFT_L2VLAN:
2651 case IFT_IEEE8023ADLAG:
2652 bcopy(lladdr, ((struct arpcom *)ifp->if_softc)->ac_enaddr, len);
2653 bcopy(lladdr, LLADDR(sdl), len);
2654 break;
2655 default:
2656 return (ENODEV);
2657 }
2658 /*
2659 * If the interface is already up, we need
2660 * to re-init it in order to reprogram its
2661 * address filter.
2662 */
2663 ifnet_serialize_all(ifp);
2664 if ((ifp->if_flags & IFF_UP) != 0) {
2665 #ifdef INET
2666 struct ifaddr_container *ifac;
2667 #endif
2668
2669 ifp->if_flags &= ~IFF_UP;
2670 ifr.ifr_flags = ifp->if_flags;
2671 ifr.ifr_flagshigh = ifp->if_flags >> 16;
2672 ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
2673 NULL);
2674 ifp->if_flags |= IFF_UP;
2675 ifr.ifr_flags = ifp->if_flags;
2676 ifr.ifr_flagshigh = ifp->if_flags >> 16;
2677 ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
2678 NULL);
2679 #ifdef INET
2680 /*
2681 * Also send gratuitous ARPs to notify other nodes about
2682 * the address change.
2683 */
2684 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
2685 struct ifaddr *ifa = ifac->ifa;
2686
2687 if (ifa->ifa_addr != NULL &&
2688 ifa->ifa_addr->sa_family == AF_INET)
2689 arp_gratuitous(ifp, ifa);
2690 }
2691 #endif
2692 }
2693 ifnet_deserialize_all(ifp);
2694 return (0);
2695 }
2696
2697 struct ifmultiaddr *
2698 ifmaof_ifpforaddr(struct sockaddr *sa, struct ifnet *ifp)
2699 {
2700 struct ifmultiaddr *ifma;
2701
2702 /* TODO: need ifnet_serialize_main */
2703 ifnet_serialize_all(ifp);
2704 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
2705 if (sa_equal(ifma->ifma_addr, sa))
2706 break;
2707 ifnet_deserialize_all(ifp);
2708
2709 return ifma;
2710 }
2711
2712 /*
2713 * This function locates the first real ethernet MAC from a network
2714 * card and loads it into node, returning 0 on success or ENOENT if
2715 * no suitable interfaces were found. It is used by the uuid code to
2716 * generate a unique 6-byte number.
2717 */
2718 int
2719 if_getanyethermac(uint16_t *node, int minlen)
2720 {
2721 struct ifnet *ifp;
2722 struct sockaddr_dl *sdl;
2723
2724 ifnet_lock();
2725 TAILQ_FOREACH(ifp, &ifnetlist, if_link) {
2726 if (ifp->if_type != IFT_ETHER)
2727 continue;
2728 sdl = IF_LLSOCKADDR(ifp);
2729 if (sdl->sdl_alen < minlen)
2730 continue;
2731 bcopy(((struct arpcom *)ifp->if_softc)->ac_enaddr, node,
2732 minlen);
2733 ifnet_unlock();
2734 return(0);
2735 }
2736 ifnet_unlock();
2737 return (ENOENT);
2738 }
2739
2740 /*
2741 * The name argument must be a pointer to storage which will last as
2742 * long as the interface does. For physical devices, the result of
2743 * device_get_name(dev) is a good choice and for pseudo-devices a
2744 * static string works well.
2745 */
2746 void
2747 if_initname(struct ifnet *ifp, const char *name, int unit)
2748 {
2749 ifp->if_dname = name;
2750 ifp->if_dunit = unit;
2751 if (unit != IF_DUNIT_NONE)
2752 ksnprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit);
2753 else
2754 strlcpy(ifp->if_xname, name, IFNAMSIZ);
2755 }
2756
2757 int
2758 if_printf(struct ifnet *ifp, const char *fmt, ...)
2759 {
2760 __va_list ap;
2761 int retval;
2762
2763 retval = kprintf("%s: ", ifp->if_xname);
2764 __va_start(ap, fmt);
2765 retval += kvprintf(fmt, ap);
2766 __va_end(ap);
2767 return (retval);
2768 }
2769
2770 struct ifnet *
2771 if_alloc(uint8_t type)
2772 {
2773 struct ifnet *ifp;
2774 size_t size;
2775
2776 /*
2777 * XXX temporary hack until arpcom is setup in if_l2com
2778 */
2779 if (type == IFT_ETHER)
2780 size = sizeof(struct arpcom);
2781 else
2782 size = sizeof(struct ifnet);
2783
2784 ifp = kmalloc(size, M_IFNET, M_WAITOK|M_ZERO);
2785
2786 ifp->if_type = type;
2787
2788 if (if_com_alloc[type] != NULL) {
2789 ifp->if_l2com = if_com_alloc[type](type, ifp);
2790 if (ifp->if_l2com == NULL) {
2791 kfree(ifp, M_IFNET);
2792 return (NULL);
2793 }
2794 }
2795 return (ifp);
2796 }
2797
2798 void
2799 if_free(struct ifnet *ifp)
2800 {
2801 kfree(ifp, M_IFNET);
2802 }
2803
2804 void
2805 ifq_set_classic(struct ifaltq *ifq)
2806 {
2807 ifq_set_methods(ifq, ifq->altq_ifp->if_mapsubq,
2808 ifsq_classic_enqueue, ifsq_classic_dequeue, ifsq_classic_request);
2809 }
2810
2811 void
2812 ifq_set_methods(struct ifaltq *ifq, altq_mapsubq_t mapsubq,
2813 ifsq_enqueue_t enqueue, ifsq_dequeue_t dequeue, ifsq_request_t request)
2814 {
2815 int q;
2816
2817 KASSERT(mapsubq != NULL, ("mapsubq is not specified"));
2818 KASSERT(enqueue != NULL, ("enqueue is not specified"));
2819 KASSERT(dequeue != NULL, ("dequeue is not specified"));
2820 KASSERT(request != NULL, ("request is not specified"));
2821
2822 ifq->altq_mapsubq = mapsubq;
2823 for (q = 0; q < ifq->altq_subq_cnt; ++q) {
2824 struct ifaltq_subque *ifsq = &ifq->altq_subq[q];
2825
2826 ifsq->ifsq_enqueue = enqueue;
2827 ifsq->ifsq_dequeue = dequeue;
2828 ifsq->ifsq_request = request;
2829 }
2830 }
2831
2832 static void
2833 ifsq_norm_enqueue(struct ifaltq_subque *ifsq, struct mbuf *m)
2834 {
2835 m->m_nextpkt = NULL;
2836 if (ifsq->ifsq_norm_tail == NULL)
2837 ifsq->ifsq_norm_head = m;
2838 else
2839 ifsq->ifsq_norm_tail->m_nextpkt = m;
2840 ifsq->ifsq_norm_tail = m;
2841 ALTQ_SQ_CNTR_INC(ifsq, m->m_pkthdr.len);
2842 }
2843
2844 static void
2845 ifsq_prio_enqueue(struct ifaltq_subque *ifsq, struct mbuf *m)
2846 {
2847 m->m_nextpkt = NULL;
2848 if (ifsq->ifsq_prio_tail == NULL)
2849 ifsq->ifsq_prio_head = m;
2850 else
2851 ifsq->ifsq_prio_tail->m_nextpkt = m;
2852 ifsq->ifsq_prio_tail = m;
2853 ALTQ_SQ_CNTR_INC(ifsq, m->m_pkthdr.len);
2854 ALTQ_SQ_PRIO_CNTR_INC(ifsq, m->m_pkthdr.len);
2855 }
2856
2857 static struct mbuf *
2858 ifsq_norm_dequeue(struct ifaltq_subque *ifsq)
2859 {
2860 struct mbuf *m;
2861
2862 m = ifsq->ifsq_norm_head;
2863 if (m != NULL) {
2864 if ((ifsq->ifsq_norm_head = m->m_nextpkt) == NULL)
2865 ifsq->ifsq_norm_tail = NULL;
2866 m->m_nextpkt = NULL;
2867 ALTQ_SQ_CNTR_DEC(ifsq, m->m_pkthdr.len);
2868 }
2869 return m;
2870 }
2871
2872 static struct mbuf *
2873 ifsq_prio_dequeue(struct ifaltq_subque *ifsq)
2874 {
2875 struct mbuf *m;
2876
2877 m = ifsq->ifsq_prio_head;
2878 if (m != NULL) {
2879 if ((ifsq->ifsq_prio_head = m->m_nextpkt) == NULL)
2880 ifsq->ifsq_prio_tail = NULL;
2881 m->m_nextpkt = NULL;
2882 ALTQ_SQ_CNTR_DEC(ifsq, m->m_pkthdr.len);
2883 ALTQ_SQ_PRIO_CNTR_DEC(ifsq, m->m_pkthdr.len);
2884 }
2885 return m;
2886 }
2887
2888 int
2889 ifsq_classic_enqueue(struct ifaltq_subque *ifsq, struct mbuf *m,
2890 struct altq_pktattr *pa __unused)
2891 {
2892 M_ASSERTPKTHDR(m);
2893 if (ifsq->ifsq_len >= ifsq->ifsq_maxlen ||
2894 ifsq->ifsq_bcnt >= ifsq->ifsq_maxbcnt) {
2895 if ((m->m_flags & M_PRIO) &&
2896 ifsq->ifsq_prio_len < (ifsq->ifsq_maxlen / 2) &&
2897 ifsq->ifsq_prio_bcnt < (ifsq->ifsq_maxbcnt / 2)) {
2898 struct mbuf *m_drop;
2899
2900 /*
2901 * Perform drop-head on normal queue
2902 */
2903 m_drop = ifsq_norm_dequeue(ifsq);
2904 if (m_drop != NULL) {
2905 m_freem(m_drop);
2906 ifsq_prio_enqueue(ifsq, m);
2907 return 0;
2908 }
2909 /* XXX nothing could be dropped? */
2910 }
2911 m_freem(m);
2912 return ENOBUFS;
2913 } else {
2914 if (m->m_flags & M_PRIO)
2915 ifsq_prio_enqueue(ifsq, m);
2916 else
2917 ifsq_norm_enqueue(ifsq, m);
2918 return 0;
2919 }
2920 }
2921
2922 struct mbuf *
2923 ifsq_classic_dequeue(struct ifaltq_subque *ifsq, int op)
2924 {
2925 struct mbuf *m;
2926
2927 switch (op) {
2928 case ALTDQ_POLL:
2929 m = ifsq->ifsq_prio_head;
2930 if (m == NULL)
2931 m = ifsq->ifsq_norm_head;
2932 break;
2933
2934 case ALTDQ_REMOVE:
2935 m = ifsq_prio_dequeue(ifsq);
2936 if (m == NULL)
2937 m = ifsq_norm_dequeue(ifsq);
2938 break;
2939
2940 default:
2941 panic("unsupported ALTQ dequeue op: %d", op);
2942 }
2943 return m;
2944 }
2945
2946 int
2947 ifsq_classic_request(struct ifaltq_subque *ifsq, int req, void *arg)
2948 {
2949 switch (req) {
2950 case ALTRQ_PURGE:
2951 for (;;) {
2952 struct mbuf *m;
2953
2954 m = ifsq_classic_dequeue(ifsq, ALTDQ_REMOVE);
2955 if (m == NULL)
2956 break;
2957 m_freem(m);
2958 }
2959 break;
2960
2961 default:
2962 panic("unsupported ALTQ request: %d", req);
2963 }
2964 return 0;
2965 }
2966
2967 static void
2968 ifsq_ifstart_try(struct ifaltq_subque *ifsq, int force_sched)
2969 {
2970 struct ifnet *ifp = ifsq_get_ifp(ifsq);
2971 int running = 0, need_sched;
2972
2973 /*
2974 * Try to do direct ifnet.if_start on the subqueue first, if there is
2975 * contention on the subqueue hardware serializer, ifnet.if_start on
2976 * the subqueue will be scheduled on the subqueue owner CPU.
2977 */
2978 if (!ifsq_tryserialize_hw(ifsq)) {
2979 /*
2980 * Subqueue hardware serializer contention happened,
2981 * ifnet.if_start on the subqueue is scheduled on
2982 * the subqueue owner CPU, and we keep going.
2983 */
2984 ifsq_ifstart_schedule(ifsq, 1);
2985 return;
2986 }
2987
2988 if ((ifp->if_flags & IFF_RUNNING) && !ifsq_is_oactive(ifsq)) {
2989 ifp->if_start(ifp, ifsq);
2990 if ((ifp->if_flags & IFF_RUNNING) && !ifsq_is_oactive(ifsq))
2991 running = 1;
2992 }
2993 need_sched = ifsq_ifstart_need_schedule(ifsq, running);
2994
2995 ifsq_deserialize_hw(ifsq);
2996
2997 if (need_sched) {
2998 /*
2999 * More data need to be transmitted, ifnet.if_start on the
3000 * subqueue is scheduled on the subqueue owner CPU, and we
3001 * keep going.
3002 * NOTE: ifnet.if_start subqueue interlock is not released.
3003 */
3004 ifsq_ifstart_schedule(ifsq, force_sched);
3005 }
3006 }
3007
3008 /*
3009 * Subqeue packets staging mechanism:
3010 *
3011 * The packets enqueued into the subqueue are staged to a certain amount
3012 * before the ifnet.if_start on the subqueue is called. In this way, the
3013 * driver could avoid writing to hardware registers upon every packet,
3014 * instead, hardware registers could be written when certain amount of
3015 * packets are put onto hardware TX ring. The measurement on several modern
3016 * NICs (emx(4), igb(4), bnx(4), bge(4), jme(4)) shows that the hardware
3017 * registers writing aggregation could save ~20% CPU time when 18bytes UDP
3018 * datagrams are transmitted at 1.48Mpps. The performance improvement by
3019 * hardware registers writing aggeregation is also mentioned by Luigi Rizzo's
3020 * netmap paper (http://info.iet.unipi.it/~luigi/netmap/).
3021 *
3022 * Subqueue packets staging is performed for two entry points into drivers'
3023 * transmission function:
3024 * - Direct ifnet.if_start calling on the subqueue, i.e. ifsq_ifstart_try()
3025 * - ifnet.if_start scheduling on the subqueue, i.e. ifsq_ifstart_schedule()
3026 *
3027 * Subqueue packets staging will be stopped upon any of the following
3028 * conditions:
3029 * - If the count of packets enqueued on the current CPU is great than or
3030 * equal to ifsq_stage_cntmax. (XXX this should be per-interface)
3031 * - If the total length of packets enqueued on the current CPU is great
3032 * than or equal to the hardware's MTU - max_protohdr. max_protohdr is
3033 * cut from the hardware's MTU mainly bacause a full TCP segment's size
3034 * is usually less than hardware's MTU.
3035 * - ifsq_ifstart_schedule() is not pending on the current CPU and
3036 * ifnet.if_start subqueue interlock (ifaltq_subq.ifsq_started) is not
3037 * released.
3038 * - The if_start_rollup(), which is registered as low priority netisr
3039 * rollup function, is called; probably because no more work is pending
3040 * for netisr.
3041 *
3042 * NOTE:
3043 * Currently subqueue packet staging is only performed in netisr threads.
3044 */
3045 int
3046 ifq_dispatch(struct ifnet *ifp, struct mbuf *m, struct altq_pktattr *pa)
3047 {
3048 struct ifaltq *ifq = &ifp->if_snd;
3049 struct ifaltq_subque *ifsq;
3050 int error, start = 0, len, mcast = 0, avoid_start = 0;
3051 struct ifsubq_stage_head *head = NULL;
3052 struct ifsubq_stage *stage = NULL;
3053 struct globaldata *gd = mycpu;
3054 struct thread *td = gd->gd_curthread;
3055
3056 crit_enter_quick(td);
3057
3058 ifsq = ifq_map_subq(ifq, gd->gd_cpuid);
3059 ASSERT_ALTQ_SQ_NOT_SERIALIZED_HW(ifsq);
3060
3061 len = m->m_pkthdr.len;
3062 if (m->m_flags & M_MCAST)
3063 mcast = 1;
3064
3065 if (td->td_type == TD_TYPE_NETISR) {
3066 head = &ifsubq_stage_heads[mycpuid];
3067 stage = ifsq_get_stage(ifsq, mycpuid);
3068
3069 stage->stg_cnt++;
3070 stage->stg_len += len;
3071 if (stage->stg_cnt < ifsq_stage_cntmax &&
3072 stage->stg_len < (ifp->if_mtu - max_protohdr))
3073 avoid_start = 1;
3074 }
3075
3076 ALTQ_SQ_LOCK(ifsq);
3077 error = ifsq_enqueue_locked(ifsq, m, pa);
3078 if (error) {
3079 IFNET_STAT_INC(ifp, oqdrops, 1);
3080 if (!ifsq_data_ready(ifsq)) {
3081 ALTQ_SQ_UNLOCK(ifsq);
3082 crit_exit_quick(td);
3083 return error;
3084 }
3085 avoid_start = 0;
3086 }
3087 if (!ifsq_is_started(ifsq)) {
3088 if (avoid_start) {
3089 ALTQ_SQ_UNLOCK(ifsq);
3090
3091 KKASSERT(!error);
3092 if ((stage->stg_flags & IFSQ_STAGE_FLAG_QUED) == 0)
3093 ifsq_stage_insert(head, stage);
3094
3095 IFNET_STAT_INC(ifp, obytes, len);
3096 if (mcast)
3097 IFNET_STAT_INC(ifp, omcasts, 1);
3098 crit_exit_quick(td);
3099 return error;
3100 }
3101
3102 /*
3103 * Hold the subqueue interlock of ifnet.if_start
3104 */
3105 ifsq_set_started(ifsq);
3106 start = 1;
3107 }
3108 ALTQ_SQ_UNLOCK(ifsq);
3109
3110 if (!error) {
3111 IFNET_STAT_INC(ifp, obytes, len);
3112 if (mcast)
3113 IFNET_STAT_INC(ifp, omcasts, 1);
3114 }
3115
3116 if (stage != NULL) {
3117 if (!start && (stage->stg_flags & IFSQ_STAGE_FLAG_SCHED)) {
3118 KKASSERT(stage->stg_flags & IFSQ_STAGE_FLAG_QUED);
3119 if (!avoid_start) {
3120 ifsq_stage_remove(head, stage);
3121 ifsq_ifstart_schedule(ifsq, 1);
3122 }
3123 crit_exit_quick(td);
3124 return error;
3125 }
3126
3127 if (stage->stg_flags & IFSQ_STAGE_FLAG_QUED) {
3128 ifsq_stage_remove(head, stage);
3129 } else {
3130 stage->stg_cnt = 0;
3131 stage->stg_len = 0;
3132 }
3133 }
3134
3135 if (!start) {
3136 crit_exit_quick(td);
3137 return error;
3138 }
3139
3140 ifsq_ifstart_try(ifsq, 0);
3141
3142 crit_exit_quick(td);
3143 return error;
3144 }
3145
3146 void *
3147 ifa_create(int size)
3148 {
3149 struct ifaddr *ifa;
3150 int i;
3151
3152 KASSERT(size >= sizeof(*ifa), ("ifaddr size too small"));
3153
3154 ifa = kmalloc(size, M_IFADDR, M_INTWAIT | M_ZERO);
3155 ifa->ifa_containers =
3156 kmalloc_cachealign(ncpus * sizeof(struct ifaddr_container),
3157 M_IFADDR, M_INTWAIT | M_ZERO);
3158
3159 ifa->ifa_ncnt = ncpus;
3160 for (i = 0; i < ncpus; ++i) {
3161 struct ifaddr_container *ifac = &ifa->ifa_containers[i];
3162
3163 ifac->ifa_magic = IFA_CONTAINER_MAGIC;
3164 ifac->ifa = ifa;
3165 ifac->ifa_refcnt = 1;
3166 }
3167 #ifdef IFADDR_DEBUG
3168 kprintf("alloc ifa %p %d\n", ifa, size);
3169 #endif
3170 return ifa;
3171 }
3172
3173 void
3174 ifac_free(struct ifaddr_container *ifac, int cpu_id)
3175 {
3176 struct ifaddr *ifa = ifac->ifa;
3177
3178 KKASSERT(ifac->ifa_magic == IFA_CONTAINER_MAGIC);
3179 KKASSERT(ifac->ifa_refcnt == 0);
3180 KASSERT(ifac->ifa_listmask == 0,
3181 ("ifa is still on %#x lists", ifac->ifa_listmask));
3182
3183 ifac->ifa_magic = IFA_CONTAINER_DEAD;
3184
3185 #ifdef IFADDR_DEBUG_VERBOSE
3186 kprintf("try free ifa %p cpu_id %d\n", ifac->ifa, cpu_id);
3187 #endif
3188
3189 KASSERT(ifa->ifa_ncnt > 0 && ifa->ifa_ncnt <= ncpus,
3190 ("invalid # of ifac, %d", ifa->ifa_ncnt));
3191 if (atomic_fetchadd_int(&ifa->ifa_ncnt, -1) == 1) {
3192 #ifdef IFADDR_DEBUG
3193 kprintf("free ifa %p\n", ifa);
3194 #endif
3195 kfree(ifa->ifa_containers, M_IFADDR);
3196 kfree(ifa, M_IFADDR);
3197 }
3198 }
3199
3200 static void
3201 ifa_iflink_dispatch(netmsg_t nmsg)
3202 {
3203 struct netmsg_ifaddr *msg = (struct netmsg_ifaddr *)nmsg;
3204 struct ifaddr *ifa = msg->ifa;
3205 struct ifnet *ifp = msg->ifp;
3206 int cpu = mycpuid;
3207 struct ifaddr_container *ifac;
3208
3209 crit_enter();
3210
3211 ifac = &ifa->ifa_containers[cpu];
3212 ASSERT_IFAC_VALID(ifac);
3213 KASSERT((ifac->ifa_listmask & IFA_LIST_IFADDRHEAD) == 0,
3214 ("ifaddr is on if_addrheads"));
3215
3216 ifac->ifa_listmask |= IFA_LIST_IFADDRHEAD;
3217 if (msg->tail)
3218 TAILQ_INSERT_TAIL(&ifp->if_addrheads[cpu], ifac, ifa_link);
3219 else
3220 TAILQ_INSERT_HEAD(&ifp->if_addrheads[cpu], ifac, ifa_link);
3221
3222 crit_exit();
3223
3224 ifa_forwardmsg(&nmsg->lmsg, cpu + 1);
3225 }
3226
3227 void
3228 ifa_iflink(struct ifaddr *ifa, struct ifnet *ifp, int tail)
3229 {
3230 struct netmsg_ifaddr msg;
3231
3232 netmsg_init(&msg.base, NULL, &curthread->td_msgport,
3233 0, ifa_iflink_dispatch);
3234 msg.ifa = ifa;
3235 msg.ifp = ifp;
3236 msg.tail = tail;
3237
3238 ifa_domsg(&msg.base.lmsg, 0);
3239 }
3240
3241 static void
3242 ifa_ifunlink_dispatch(netmsg_t nmsg)
3243 {
3244 struct netmsg_ifaddr *msg = (struct netmsg_ifaddr *)nmsg;
3245 struct ifaddr *ifa = msg->ifa;
3246 struct ifnet *ifp = msg->ifp;
3247 int cpu = mycpuid;
3248 struct ifaddr_container *ifac;
3249
3250 crit_enter();
3251
3252 ifac = &ifa->ifa_containers[cpu];
3253 ASSERT_IFAC_VALID(ifac);
3254 KASSERT(ifac->ifa_listmask & IFA_LIST_IFADDRHEAD,
3255 ("ifaddr is not on if_addrhead"));
3256
3257 TAILQ_REMOVE(&ifp->if_addrheads[cpu], ifac, ifa_link);
3258 ifac->ifa_listmask &= ~IFA_LIST_IFADDRHEAD;
3259
3260 crit_exit();
3261
3262 ifa_forwardmsg(&nmsg->lmsg, cpu + 1);
3263 }
3264
3265 void
3266 ifa_ifunlink(struct ifaddr *ifa, struct ifnet *ifp)
3267 {
3268 struct netmsg_ifaddr msg;
3269
3270 netmsg_init(&msg.base, NULL, &curthread->td_msgport,
3271 0, ifa_ifunlink_dispatch);
3272 msg.ifa = ifa;
3273 msg.ifp = ifp;
3274
3275 ifa_domsg(&msg.base.lmsg, 0);
3276 }
3277
3278 static void
3279 ifa_destroy_dispatch(netmsg_t nmsg)
3280 {
3281 struct netmsg_ifaddr *msg = (struct netmsg_ifaddr *)nmsg;
3282
3283 IFAFREE(msg->ifa);
3284 ifa_forwardmsg(&nmsg->lmsg, mycpuid + 1);
3285 }
3286
3287 void
3288 ifa_destroy(struct ifaddr *ifa)
3289 {
3290 struct netmsg_ifaddr msg;
3291
3292 netmsg_init(&msg.base, NULL, &curthread->td_msgport,
3293 0, ifa_destroy_dispatch);
3294 msg.ifa = ifa;
3295
3296 ifa_domsg(&msg.base.lmsg, 0);
3297 }
3298
3299 struct lwkt_port *
3300 ifnet_portfn(int cpu)
3301 {
3302 return &ifnet_threads[cpu]->td_msgport;
3303 }
3304
3305 void
3306 ifnet_forwardmsg(struct lwkt_msg *lmsg, int next_cpu)
3307 {
3308 KKASSERT(next_cpu > mycpuid && next_cpu <= ncpus);
3309
3310 if (next_cpu < ncpus)
3311 lwkt_forwardmsg(ifnet_portfn(next_cpu), lmsg);
3312 else
3313 lwkt_replymsg(lmsg, 0);
3314 }
3315
3316 int
3317 ifnet_domsg(struct lwkt_msg *lmsg, int cpu)
3318 {
3319 KKASSERT(cpu < ncpus);
3320 return lwkt_domsg(ifnet_portfn(cpu), lmsg, 0);
3321 }
3322
3323 void
3324 ifnet_sendmsg(struct lwkt_msg *lmsg, int cpu)
3325 {
3326 KKASSERT(cpu < ncpus);
3327 lwkt_sendmsg(ifnet_portfn(cpu), lmsg);
3328 }
3329
3330 /*
3331 * Generic netmsg service loop. Some protocols may roll their own but all
3332 * must do the basic command dispatch function call done here.
3333 */
3334 static void
3335 ifnet_service_loop(void *arg __unused)
3336 {
3337 netmsg_t msg;
3338
3339 while ((msg = lwkt_waitport(&curthread->td_msgport, 0))) {
3340 KASSERT(msg->base.nm_dispatch, ("ifnet_service: badmsg"));
3341 msg->base.nm_dispatch(msg);
3342 }
3343 }
3344
3345 static void
3346 if_start_rollup(void)
3347 {
3348 struct ifsubq_stage_head *head = &ifsubq_stage_heads[mycpuid];
3349 struct ifsubq_stage *stage;
3350
3351 crit_enter();
3352
3353 while ((stage = TAILQ_FIRST(&head->stg_head)) != NULL) {
3354 struct ifaltq_subque *ifsq = stage->stg_subq;
3355 int is_sched = 0;
3356
3357 if (stage->stg_flags & IFSQ_STAGE_FLAG_SCHED)
3358 is_sched = 1;
3359 ifsq_stage_remove(head, stage);
3360
3361 if (is_sched) {
3362 ifsq_ifstart_schedule(ifsq, 1);
3363 } else {
3364 int start = 0;
3365
3366 ALTQ_SQ_LOCK(ifsq);
3367 if (!ifsq_is_started(ifsq)) {
3368 /*
3369 * Hold the subqueue interlock of
3370 * ifnet.if_start
3371 */
3372 ifsq_set_started(ifsq);
3373 start = 1;
3374 }
3375 ALTQ_SQ_UNLOCK(ifsq);
3376
3377 if (start)
3378 ifsq_ifstart_try(ifsq, 1);
3379 }
3380 KKASSERT((stage->stg_flags &
3381 (IFSQ_STAGE_FLAG_QUED | IFSQ_STAGE_FLAG_SCHED)) == 0);
3382 }
3383
3384 crit_exit();
3385 }
3386
3387 static void
3388 ifnetinit(void *dummy __unused)
3389 {
3390 int i;
3391
3392 for (i = 0; i < ncpus; ++i) {
3393 struct thread **thr = &ifnet_threads[i];
3394
3395 lwkt_create(ifnet_service_loop, NULL, thr, NULL,
3396 TDF_NOSTART|TDF_FORCE_SPINPORT|TDF_FIXEDCPU,
3397 i, "ifnet %d", i);
3398 netmsg_service_port_init(&(*thr)->td_msgport);
3399 lwkt_schedule(*thr);
3400 }
3401
3402 for (i = 0; i < ncpus; ++i)
3403 TAILQ_INIT(&ifsubq_stage_heads[i].stg_head);
3404 netisr_register_rollup(if_start_rollup, NETISR_ROLLUP_PRIO_IFSTART);
3405 }
3406
3407 void
3408 if_register_com_alloc(u_char type,
3409 if_com_alloc_t *a, if_com_free_t *f)
3410 {
3411
3412 KASSERT(if_com_alloc[type] == NULL,
3413 ("if_register_com_alloc: %d already registered", type));
3414 KASSERT(if_com_free[type] == NULL,
3415 ("if_register_com_alloc: %d free already registered", type));
3416
3417 if_com_alloc[type] = a;
3418 if_com_free[type] = f;
3419 }
3420
3421 void
3422 if_deregister_com_alloc(u_char type)
3423 {
3424
3425 KASSERT(if_com_alloc[type] != NULL,
3426 ("if_deregister_com_alloc: %d not registered", type));
3427 KASSERT(if_com_free[type] != NULL,
3428 ("if_deregister_com_alloc: %d free not registered", type));
3429 if_com_alloc[type] = NULL;
3430 if_com_free[type] = NULL;
3431 }
3432
3433 int
3434 if_ring_count2(int cnt, int cnt_max)
3435 {
3436 int shift = 0;
3437
3438 KASSERT(cnt_max >= 1 && powerof2(cnt_max),
3439 ("invalid ring count max %d", cnt_max));
3440
3441 if (cnt <= 0)
3442 cnt = cnt_max;
3443 if (cnt > ncpus2)
3444 cnt = ncpus2;
3445 if (cnt > cnt_max)
3446 cnt = cnt_max;
3447
3448 while ((1 << (shift + 1)) <= cnt)
3449 ++shift;
3450 cnt = 1 << shift;
3451
3452 KASSERT(cnt >= 1 && cnt <= ncpus2 && cnt <= cnt_max,
3453 ("calculate cnt %d, ncpus2 %d, cnt max %d",
3454 cnt, ncpus2, cnt_max));
3455 return cnt;
3456 }
3457
3458 void
3459 ifq_set_maxlen(struct ifaltq *ifq, int len)
3460 {
3461 ifq->altq_maxlen = len + (ncpus * ifsq_stage_cntmax);
3462 }
3463
3464 int
3465 ifq_mapsubq_default(struct ifaltq *ifq __unused, int cpuid __unused)
3466 {
3467 return ALTQ_SUBQ_INDEX_DEFAULT;
3468 }
3469
3470 int
3471 ifq_mapsubq_mask(struct ifaltq *ifq, int cpuid)
3472 {
3473 return (cpuid & ifq->altq_subq_mask);
3474 }
3475
3476 static void
3477 ifsq_watchdog(void *arg)
3478 {
3479 struct ifsubq_watchdog *wd = arg;
3480 struct ifnet *ifp;
3481
3482 if (__predict_true(wd->wd_timer == 0 || --wd->wd_timer))
3483 goto done;
3484
3485 ifp = ifsq_get_ifp(wd->wd_subq);
3486 if (ifnet_tryserialize_all(ifp)) {
3487 wd->wd_watchdog(wd->wd_subq);
3488 ifnet_deserialize_all(ifp);
3489 } else {
3490 /* try again next timeout */
3491 wd->wd_timer = 1;
3492 }
3493 done:
3494 ifsq_watchdog_reset(wd);
3495 }
3496
3497 static void
3498 ifsq_watchdog_reset(struct ifsubq_watchdog *wd)
3499 {
3500 callout_reset_bycpu(&wd->wd_callout, hz, ifsq_watchdog, wd,
3501 ifsq_get_cpuid(wd->wd_subq));
3502 }
3503
3504 void
3505 ifsq_watchdog_init(struct ifsubq_watchdog *wd, struct ifaltq_subque *ifsq,
3506 ifsq_watchdog_t watchdog)
3507 {
3508 callout_init_mp(&wd->wd_callout);
3509 wd->wd_timer = 0;
3510 wd->wd_subq = ifsq;
3511 wd->wd_watchdog = watchdog;
3512 }
3513
3514 void
3515 ifsq_watchdog_start(struct ifsubq_watchdog *wd)
3516 {
3517 wd->wd_timer = 0;
3518 ifsq_watchdog_reset(wd);
3519 }
3520
3521 void
3522 ifsq_watchdog_stop(struct ifsubq_watchdog *wd)
3523 {
3524 wd->wd_timer = 0;
3525 callout_stop(&wd->wd_callout);
3526 }
3527
3528 void
3529 ifnet_lock(void)
3530 {
3531 KASSERT(curthread->td_type != TD_TYPE_NETISR,
3532 ("try holding ifnet lock in netisr"));
3533 mtx_lock(&ifnet_mtx);
3534 }
3535
3536 void
3537 ifnet_unlock(void)
3538 {
3539 KASSERT(curthread->td_type != TD_TYPE_NETISR,
3540 ("try holding ifnet lock in netisr"));
3541 mtx_unlock(&ifnet_mtx);
3542 }
3543
3544 static struct ifnet_array *
3545 ifnet_array_alloc(int count)
3546 {
3547 struct ifnet_array *arr;
3548
3549 arr = kmalloc(__offsetof(struct ifnet_array, ifnet_arr[count]),
3550 M_IFNET, M_WAITOK);
3551 arr->ifnet_count = count;
3552
3553 return arr;
3554 }
3555
3556 static void
3557 ifnet_array_free(struct ifnet_array *arr)
3558 {
3559 if (arr == &ifnet_array0)
3560 return;
3561 kfree(arr, M_IFNET);
3562 }
3563
3564 static struct ifnet_array *
3565 ifnet_array_add(struct ifnet *ifp, const struct ifnet_array *old_arr)
3566 {
3567 struct ifnet_array *arr;
3568 int count, i;
3569
3570 KASSERT(old_arr->ifnet_count >= 0,
3571 ("invalid ifnet array count %d", old_arr->ifnet_count));
3572 count = old_arr->ifnet_count + 1;
3573 arr = ifnet_array_alloc(count);
3574
3575 /*
3576 * Save the old ifnet array and append this ifp to the end of
3577 * the new ifnet array.
3578 */
3579 for (i = 0; i < old_arr->ifnet_count; ++i) {
3580 KASSERT(old_arr->ifnet_arr[i] != ifp,
3581 ("%s is already in ifnet array", ifp->if_xname));
3582 arr->ifnet_arr[i] = old_arr->ifnet_arr[i];
3583 }
3584 KASSERT(i == count - 1,
3585 ("add %s, ifnet array index mismatch, should be %d, but got %d",
3586 ifp->if_xname, count - 1, i));
3587 arr->ifnet_arr[i] = ifp;
3588
3589 return arr;
3590 }
3591
3592 static struct ifnet_array *
3593 ifnet_array_del(struct ifnet *ifp, const struct ifnet_array *old_arr)
3594 {
3595 struct ifnet_array *arr;
3596 int count, i, idx, found = 0;
3597
3598 KASSERT(old_arr->ifnet_count > 0,
3599 ("invalid ifnet array count %d", old_arr->ifnet_count));
3600 count = old_arr->ifnet_count - 1;
3601 arr = ifnet_array_alloc(count);
3602
3603 /*
3604 * Save the old ifnet array, but skip this ifp.
3605 */
3606 idx = 0;
3607 for (i = 0; i < old_arr->ifnet_count; ++i) {
3608 if (old_arr->ifnet_arr[i] == ifp) {
3609 KASSERT(!found,
3610 ("dup %s is in ifnet array", ifp->if_xname));
3611 found = 1;
3612 continue;
3613 }
3614 KASSERT(idx < count,
3615 ("invalid ifnet array index %d, count %d", idx, count));
3616 arr->ifnet_arr[idx] = old_arr->ifnet_arr[i];
3617 ++idx;
3618 }
3619 KASSERT(found, ("%s is not in ifnet array", ifp->if_xname));
3620 KASSERT(idx == count,
3621 ("del %s, ifnet array count mismatch, should be %d, but got %d ",
3622 ifp->if_xname, count, idx));
3623
3624 return arr;
3625 }
3626
3627 const struct ifnet_array *
3628 ifnet_array_get(void)
3629 {
3630 KASSERT(curthread->td_type == TD_TYPE_NETISR, ("not in netisr"));
3631 return ifnet_array;
3632 }
3633
3634 int
3635 ifnet_array_isempty(void)
3636 {
3637 KASSERT(curthread->td_type == TD_TYPE_NETISR, ("not in netisr"));
3638 if (ifnet_array->ifnet_count == 0)
3639 return 1;
3640 else
3641 return 0;
3642 }
3643
3644 void
3645 ifa_marker_init(struct ifaddr_marker *mark, struct ifnet *ifp)
3646 {
3647 struct ifaddr *ifa;
3648
3649 memset(mark, 0, sizeof(*mark));
3650 ifa = &mark->ifa;
3651
3652 mark->ifac.ifa = ifa;
3653
3654 ifa->ifa_addr = &mark->addr;
3655 ifa->ifa_dstaddr = &mark->dstaddr;
3656 ifa->ifa_netmask = &mark->netmask;
3657 ifa->ifa_ifp = ifp;
3658 }
DragonFly BSD