2 * Copyright (c) 1980, 1986, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
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 $
33 #include "opt_compat.h"
34 #include "opt_inet6.h"
36 #include "opt_ifpoll.h"
38 #include <sys/param.h>
39 #include <sys/malloc.h>
41 #include <sys/systm.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>
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>
59 #include <sys/thread2.h>
60 #include <sys/msgport2.h>
61 #include <sys/mutex2.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>
75 #include <machine/atomic.h>
76 #include <machine/stdarg.h>
77 #include <machine/smp.h>
79 #if defined(INET) || defined(INET6)
81 #include <netinet/in.h>
82 #include <netinet/in_var.h>
83 #include <netinet/if_ether.h>
85 #include <netinet6/in6_var.h>
86 #include <netinet6/in6_ifattach.h>
90 #if defined(COMPAT_43)
91 #include <emulation/43bsd/43bsd_socket.h>
92 #endif /* COMPAT_43 */
94 struct netmsg_ifaddr {
95 struct netmsg_base base;
101 struct ifsubq_stage_head {
102 TAILQ_HEAD(, ifsubq_stage) stg_head;
106 * System initialization
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);
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 *);
130 * XXX: declare here to avoid to include many inet6 related files..
131 * should be more generalized?
133 extern void nd6_setmtu(struct ifnet *);
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");
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");
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");
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);
152 static if_com_alloc_t *if_com_alloc[256];
153 static if_com_free_t *if_com_free[256];
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");
159 int ifqmaxlen = IFQ_MAXLEN;
160 struct ifnethead ifnet = TAILQ_HEAD_INITIALIZER(ifnet);
162 static struct ifnet_array ifnet_array0;
163 static struct ifnet_array *ifnet_array = &ifnet_array0;
165 static struct callout if_slowtimo_timer;
166 static struct netmsg_base if_slowtimo_netmsg;
169 struct ifnet **ifindex2ifnet = NULL;
170 static struct thread ifnet_threads[MAXCPU];
171 static struct mtx ifnet_mtx = MTX_INITIALIZER;
173 static struct ifsubq_stage_head ifsubq_stage_heads[MAXCPU];
176 #define IFQ_KTR_STRING "ifq=%p"
177 #define IFQ_KTR_ARGS struct ifaltq *ifq
179 #define KTR_IFQ KTR_ALL
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)
186 #define IF_START_KTR_STRING "ifp=%p"
187 #define IF_START_KTR_ARGS struct ifnet *ifp
189 #define KTR_IF_START KTR_ALL
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)
205 TAILQ_HEAD(, ifg_group) ifg_head = TAILQ_HEAD_INITIALIZER(ifg_head);
208 * Network interface utility routines.
210 * Routines with ifa_ifwith* names take sockaddr *'s as
219 callout_init_mp(&if_slowtimo_timer);
220 netmsg_init(&if_slowtimo_netmsg, NULL, &netisr_adone_rport,
221 MSGF_PRIORITY, if_slowtimo_dispatch);
223 /* XXX is this necessary? */
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);
233 /* Start if_slowtimo */
234 lwkt_sendmsg(netisr_cpuport(0), &if_slowtimo_netmsg.lmsg);
238 ifsq_ifstart_ipifunc(void *arg)
240 struct ifaltq_subque *ifsq = arg;
241 struct lwkt_msg *lmsg = ifsq_get_ifstart_lmsg(ifsq, mycpuid);
244 if (lmsg->ms_flags & MSGF_DONE)
245 lwkt_sendmsg_oncpu(netisr_cpuport(mycpuid), lmsg);
250 ifsq_stage_remove(struct ifsubq_stage_head *head, struct ifsubq_stage *stage)
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);
260 ifsq_stage_insert(struct ifsubq_stage_head *head, struct ifsubq_stage *stage)
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);
269 * Schedule ifnet.if_start on the subqueue owner CPU
272 ifsq_ifstart_schedule(struct ifaltq_subque *ifsq, int force)
276 if (!force && curthread->td_type == TD_TYPE_NETISR &&
277 ifsq_stage_cntmax > 0) {
278 struct ifsubq_stage *stage = ifsq_get_stage(ifsq, mycpuid);
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;
288 cpu = ifsq_get_cpuid(ifsq);
290 lwkt_send_ipiq(globaldata_find(cpu), ifsq_ifstart_ipifunc, ifsq);
292 ifsq_ifstart_ipifunc(ifsq);
297 * This function will release ifnet.if_start subqueue interlock,
298 * if ifnet.if_start for the subqueue does not need to be scheduled
301 ifsq_ifstart_need_schedule(struct ifaltq_subque *ifsq, int running)
303 if (!running || ifsq_is_empty(ifsq)
305 || ifsq->ifsq_altq->altq_tbr != NULL
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
322 * TBR callout will call ifnet.if_start on the
325 if (!running || !ifsq_data_ready(ifsq)) {
326 ifsq_clr_started(ifsq);
327 ALTQ_SQ_UNLOCK(ifsq);
330 ALTQ_SQ_UNLOCK(ifsq);
336 ifsq_ifstart_dispatch(netmsg_t msg)
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;
346 lwkt_replymsg(lmsg, 0); /* reply ASAP */
348 if (gd->gd_cpuid != ifsq_get_cpuid(ifsq)) {
350 * We need to chase the subqueue owner CPU change.
352 ifsq_ifstart_schedule(ifsq, 1);
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))
363 need_sched = ifsq_ifstart_need_schedule(ifsq, running);
364 ifsq_deserialize_hw(ifsq);
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.
372 ifsq_ifstart_schedule(ifsq, 0);
378 /* Device driver ifnet.if_start helper function */
380 ifsq_devstart(struct ifaltq_subque *ifsq)
382 struct ifnet *ifp = ifsq_get_ifp(ifsq);
385 ASSERT_ALTQ_SQ_SERIALIZED_HW(ifsq);
388 if (ifsq_is_started(ifsq) || !ifsq_data_ready(ifsq)) {
389 ALTQ_SQ_UNLOCK(ifsq);
392 ifsq_set_started(ifsq);
393 ALTQ_SQ_UNLOCK(ifsq);
395 ifp->if_start(ifp, ifsq);
397 if ((ifp->if_flags & IFF_RUNNING) && !ifsq_is_oactive(ifsq))
400 if (ifsq_ifstart_need_schedule(ifsq, running)) {
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.
406 ifsq_ifstart_schedule(ifsq, 0);
411 if_devstart(struct ifnet *ifp)
413 ifsq_devstart(ifq_get_subq_default(&ifp->if_snd));
416 /* Device driver ifnet.if_start schedule helper function */
418 ifsq_devstart_sched(struct ifaltq_subque *ifsq)
420 ifsq_ifstart_schedule(ifsq, 1);
424 if_devstart_sched(struct ifnet *ifp)
426 ifsq_devstart_sched(ifq_get_subq_default(&ifp->if_snd));
430 if_default_serialize(struct ifnet *ifp, enum ifnet_serialize slz __unused)
432 lwkt_serialize_enter(ifp->if_serializer);
436 if_default_deserialize(struct ifnet *ifp, enum ifnet_serialize slz __unused)
438 lwkt_serialize_exit(ifp->if_serializer);
442 if_default_tryserialize(struct ifnet *ifp, enum ifnet_serialize slz __unused)
444 return lwkt_serialize_try(ifp->if_serializer);
449 if_default_serialize_assert(struct ifnet *ifp,
450 enum ifnet_serialize slz __unused,
451 boolean_t serialized)
454 ASSERT_SERIALIZED(ifp->if_serializer);
456 ASSERT_NOT_SERIALIZED(ifp->if_serializer);
461 * Attach an interface to the list of "active" interfaces.
463 * The serializer is optional.
466 if_attach(struct ifnet *ifp, lwkt_serialize_t serializer)
468 unsigned socksize, ifasize;
469 int namelen, masklen;
470 struct sockaddr_dl *sdl, *sdl_addr;
473 struct ifnet **old_ifindex2ifnet = NULL;
474 struct ifnet_array *old_ifnet_array;
477 static int if_indexlim = 8;
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"));
486 * If the device supplies serialize functions,
487 * then clear if_serializer to catch any invalid
488 * usage of this field.
490 KASSERT(serializer == NULL,
491 ("both serialize functions and default serializer "
493 ifp->if_serializer = NULL;
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;
503 ifp->if_serialize_assert = if_default_serialize_assert;
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.
513 if (serializer == NULL) {
514 serializer = &ifp->if_default_serializer;
515 lwkt_serialize_init(serializer);
517 ifp->if_serializer = serializer;
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.
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]);
532 TAILQ_INIT(&ifp->if_multiaddrs);
533 TAILQ_INIT(&ifp->if_groups);
534 getmicrotime(&ifp->if_lastchange);
537 * create a Link Level name for this device
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 ifasize = sizeof(struct ifaddr) + 2 * socksize;
546 ifa = ifa_create(ifasize, M_WAITOK);
547 sdl = sdl_addr = (struct sockaddr_dl *)(ifa + 1);
548 sdl->sdl_len = socksize;
549 sdl->sdl_family = AF_LINK;
550 bcopy(ifp->if_xname, sdl->sdl_data, namelen);
551 sdl->sdl_nlen = namelen;
552 sdl->sdl_type = ifp->if_type;
553 ifp->if_lladdr = ifa;
555 ifa->ifa_rtrequest = link_rtrequest;
556 ifa->ifa_addr = (struct sockaddr *)sdl;
557 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
558 ifa->ifa_netmask = (struct sockaddr *)sdl;
559 sdl->sdl_len = masklen;
561 sdl->sdl_data[--namelen] = 0xff;
562 ifa_iflink(ifa, ifp, 0 /* Insert head */);
564 ifp->if_data_pcpu = kmalloc_cachealign(
565 ncpus * sizeof(struct ifdata_pcpu), M_DEVBUF, M_WAITOK | M_ZERO);
567 if (ifp->if_mapsubq == NULL)
568 ifp->if_mapsubq = ifq_mapsubq_default;
572 ifq->altq_disc = NULL;
573 ifq->altq_flags &= ALTQF_CANTCHANGE;
574 ifq->altq_tbr = NULL;
577 if (ifq->altq_subq_cnt <= 0)
578 ifq->altq_subq_cnt = 1;
579 ifq->altq_subq = kmalloc_cachealign(
580 ifq->altq_subq_cnt * sizeof(struct ifaltq_subque),
581 M_DEVBUF, M_WAITOK | M_ZERO);
583 if (ifq->altq_maxlen == 0) {
584 if_printf(ifp, "driver didn't set altq_maxlen\n");
585 ifq_set_maxlen(ifq, ifqmaxlen);
588 for (q = 0; q < ifq->altq_subq_cnt; ++q) {
589 struct ifaltq_subque *ifsq = &ifq->altq_subq[q];
591 ALTQ_SQ_LOCK_INIT(ifsq);
592 ifsq->ifsq_index = q;
594 ifsq->ifsq_altq = ifq;
595 ifsq->ifsq_ifp = ifp;
597 ifsq->ifsq_maxlen = ifq->altq_maxlen;
598 ifsq->ifsq_maxbcnt = ifsq->ifsq_maxlen * MCLBYTES;
599 ifsq->ifsq_prepended = NULL;
600 ifsq->ifsq_started = 0;
601 ifsq->ifsq_hw_oactive = 0;
602 ifsq_set_cpuid(ifsq, 0);
603 if (ifp->if_serializer != NULL)
604 ifsq_set_hw_serialize(ifsq, ifp->if_serializer);
607 kmalloc_cachealign(ncpus * sizeof(struct ifsubq_stage),
608 M_DEVBUF, M_WAITOK | M_ZERO);
609 for (i = 0; i < ncpus; ++i)
610 ifsq->ifsq_stage[i].stg_subq = ifsq;
612 ifsq->ifsq_ifstart_nmsg =
613 kmalloc(ncpus * sizeof(struct netmsg_base),
614 M_LWKTMSG, M_WAITOK);
615 for (i = 0; i < ncpus; ++i) {
616 netmsg_init(&ifsq->ifsq_ifstart_nmsg[i], NULL,
617 &netisr_adone_rport, 0, ifsq_ifstart_dispatch);
618 ifsq->ifsq_ifstart_nmsg[i].lmsg.u.ms_resultp = ifsq;
621 ifq_set_classic(ifq);
624 * Install this ifp into ifindex2inet, ifnet queue and ifnet
625 * array after it is setup.
627 * Protect ifindex2ifnet, ifnet queue and ifnet array changes
628 * by ifnet lock, so that non-netisr threads could get a
633 /* Don't update if_index until ifindex2ifnet is setup */
634 ifp->if_index = if_index + 1;
635 sdl_addr->sdl_index = ifp->if_index;
638 * Install this ifp into ifindex2ifnet
640 if (ifindex2ifnet == NULL || ifp->if_index >= if_indexlim) {
648 n = if_indexlim * sizeof(*q);
649 q = kmalloc(n, M_IFADDR, M_WAITOK | M_ZERO);
650 if (ifindex2ifnet != NULL) {
651 bcopy(ifindex2ifnet, q, n/2);
652 /* Free old ifindex2ifnet after sync all netisrs */
653 old_ifindex2ifnet = ifindex2ifnet;
657 ifindex2ifnet[ifp->if_index] = ifp;
659 * Update if_index after this ifp is installed into ifindex2ifnet,
660 * so that netisrs could get a consistent view of ifindex2ifnet.
663 if_index = ifp->if_index;
666 * Install this ifp into ifnet array.
668 /* Free old ifnet array after sync all netisrs */
669 old_ifnet_array = ifnet_array;
670 ifnet_array = ifnet_array_add(ifp, old_ifnet_array);
673 * Install this ifp into ifnet queue.
675 TAILQ_INSERT_TAIL(&ifnetlist, ifp, if_link);
680 * Sync all netisrs so that the old ifindex2ifnet and ifnet array
681 * are no longer accessed and we can free them safely later on.
683 netmsg_service_sync();
684 if (old_ifindex2ifnet != NULL)
685 kfree(old_ifindex2ifnet, M_IFADDR);
686 ifnet_array_free(old_ifnet_array);
688 if (!SLIST_EMPTY(&domains))
689 if_attachdomain1(ifp);
691 /* Announce the interface. */
692 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp);
693 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL);
694 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
698 if_attachdomain(void *dummy)
703 TAILQ_FOREACH(ifp, &ifnetlist, if_list)
704 if_attachdomain1(ifp);
707 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_FIRST,
708 if_attachdomain, NULL);
711 if_attachdomain1(struct ifnet *ifp)
717 /* address family dependent data region */
718 bzero(ifp->if_afdata, sizeof(ifp->if_afdata));
719 SLIST_FOREACH(dp, &domains, dom_next)
720 if (dp->dom_ifattach)
721 ifp->if_afdata[dp->dom_family] =
722 (*dp->dom_ifattach)(ifp);
727 * Purge all addresses whose type is _not_ AF_LINK
730 if_purgeaddrs_nolink_dispatch(netmsg_t nmsg)
732 struct lwkt_msg *lmsg = &nmsg->lmsg;
733 struct ifnet *ifp = lmsg->u.ms_resultp;
734 struct ifaddr_container *ifac, *next;
736 KASSERT(&curthread->td_msgport == netisr_cpuport(0),
740 * The ifaddr processing in the following loop will block,
741 * however, this function is called in netisr0, in which
742 * ifaddr list changes happen, so we don't care about the
743 * blockness of the ifaddr processing here.
745 TAILQ_FOREACH_MUTABLE(ifac, &ifp->if_addrheads[mycpuid],
747 struct ifaddr *ifa = ifac->ifa;
750 if (ifa->ifa_addr->sa_family == AF_UNSPEC)
753 /* Leave link ifaddr as it is */
754 if (ifa->ifa_addr->sa_family == AF_LINK)
757 /* XXX: Ugly!! ad hoc just for INET */
758 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET) {
759 struct ifaliasreq ifr;
760 #ifdef IFADDR_DEBUG_VERBOSE
763 kprintf("purge in4 addr %p: ", ifa);
764 for (i = 0; i < ncpus; ++i)
765 kprintf("%d ", ifa->ifa_containers[i].ifa_refcnt);
769 bzero(&ifr, sizeof ifr);
770 ifr.ifra_addr = *ifa->ifa_addr;
771 if (ifa->ifa_dstaddr)
772 ifr.ifra_broadaddr = *ifa->ifa_dstaddr;
773 if (in_control(SIOCDIFADDR, (caddr_t)&ifr, ifp,
779 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET6) {
780 #ifdef IFADDR_DEBUG_VERBOSE
783 kprintf("purge in6 addr %p: ", ifa);
784 for (i = 0; i < ncpus; ++i)
785 kprintf("%d ", ifa->ifa_containers[i].ifa_refcnt);
790 /* ifp_addrhead is already updated */
794 ifa_ifunlink(ifa, ifp);
798 lwkt_replymsg(lmsg, 0);
802 if_purgeaddrs_nolink(struct ifnet *ifp)
804 struct netmsg_base nmsg;
805 struct lwkt_msg *lmsg = &nmsg.lmsg;
807 ASSERT_CANDOMSG_NETISR0(curthread);
809 netmsg_init(&nmsg, NULL, &curthread->td_msgport, 0,
810 if_purgeaddrs_nolink_dispatch);
811 lmsg->u.ms_resultp = ifp;
812 lwkt_domsg(netisr_cpuport(0), lmsg, 0);
816 ifq_stage_detach_handler(netmsg_t nmsg)
818 struct ifaltq *ifq = nmsg->lmsg.u.ms_resultp;
821 for (q = 0; q < ifq->altq_subq_cnt; ++q) {
822 struct ifaltq_subque *ifsq = &ifq->altq_subq[q];
823 struct ifsubq_stage *stage = ifsq_get_stage(ifsq, mycpuid);
825 if (stage->stg_flags & IFSQ_STAGE_FLAG_QUED)
826 ifsq_stage_remove(&ifsubq_stage_heads[mycpuid], stage);
828 lwkt_replymsg(&nmsg->lmsg, 0);
832 ifq_stage_detach(struct ifaltq *ifq)
834 struct netmsg_base base;
837 netmsg_init(&base, NULL, &curthread->td_msgport, 0,
838 ifq_stage_detach_handler);
839 base.lmsg.u.ms_resultp = ifq;
841 for (cpu = 0; cpu < ncpus; ++cpu)
842 lwkt_domsg(netisr_cpuport(cpu), &base.lmsg, 0);
845 struct netmsg_if_rtdel {
846 struct netmsg_base base;
851 if_rtdel_dispatch(netmsg_t msg)
853 struct netmsg_if_rtdel *rmsg = (void *)msg;
857 for (i = 1; i <= AF_MAX; i++) {
858 struct radix_node_head *rnh;
860 if ((rnh = rt_tables[cpu][i]) == NULL)
862 rnh->rnh_walktree(rnh, if_rtdel, rmsg->ifp);
867 lwkt_forwardmsg(netisr_cpuport(nextcpu), &rmsg->base.lmsg);
869 lwkt_replymsg(&rmsg->base.lmsg, 0);
873 * Detach an interface, removing it from the
874 * list of "active" interfaces.
877 if_detach(struct ifnet *ifp)
879 struct ifnet_array *old_ifnet_array;
880 struct netmsg_if_rtdel msg;
884 /* Announce that the interface is gone. */
885 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp);
886 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
887 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL);
890 * Remove this ifp from ifindex2inet, ifnet queue and ifnet
891 * array before it is whacked.
893 * Protect ifindex2ifnet, ifnet queue and ifnet array changes
894 * by ifnet lock, so that non-netisr threads could get a
900 * Remove this ifp from ifindex2ifnet and maybe decrement if_index.
902 ifindex2ifnet[ifp->if_index] = NULL;
903 while (if_index > 0 && ifindex2ifnet[if_index] == NULL)
907 * Remove this ifp from ifnet queue.
909 TAILQ_REMOVE(&ifnetlist, ifp, if_link);
912 * Remove this ifp from ifnet array.
914 /* Free old ifnet array after sync all netisrs */
915 old_ifnet_array = ifnet_array;
916 ifnet_array = ifnet_array_del(ifp, old_ifnet_array);
921 * Sync all netisrs so that the old ifnet array is no longer
922 * accessed and we can free it safely later on.
924 netmsg_service_sync();
925 ifnet_array_free(old_ifnet_array);
928 * Remove routes and flush queues.
932 if (ifp->if_flags & IFF_NPOLLING)
933 ifpoll_deregister(ifp);
938 if (ifq_is_enabled(&ifp->if_snd))
939 altq_disable(&ifp->if_snd);
940 if (ifq_is_attached(&ifp->if_snd))
941 altq_detach(&ifp->if_snd);
945 * Clean up all addresses.
947 ifp->if_lladdr = NULL;
949 if_purgeaddrs_nolink(ifp);
950 if (!TAILQ_EMPTY(&ifp->if_addrheads[mycpuid])) {
953 ifa = TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa;
954 KASSERT(ifa->ifa_addr->sa_family == AF_LINK,
955 ("non-link ifaddr is left on if_addrheads"));
957 ifa_ifunlink(ifa, ifp);
959 KASSERT(TAILQ_EMPTY(&ifp->if_addrheads[mycpuid]),
960 ("there are still ifaddrs left on if_addrheads"));
965 * Remove all IPv4 kernel structures related to ifp.
972 * Remove all IPv6 kernel structs related to ifp. This should be done
973 * before removing routing entries below, since IPv6 interface direct
974 * routes are expected to be removed by the IPv6-specific kernel API.
975 * Otherwise, the kernel will detect some inconsistency and bark it.
981 * Delete all remaining routes using this interface
983 netmsg_init(&msg.base, NULL, &curthread->td_msgport, MSGF_PRIORITY,
986 rt_domsg_global(&msg.base);
988 SLIST_FOREACH(dp, &domains, dom_next)
989 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family])
990 (*dp->dom_ifdetach)(ifp,
991 ifp->if_afdata[dp->dom_family]);
993 kfree(ifp->if_addrheads, M_IFADDR);
995 lwkt_synchronize_ipiqs("if_detach");
996 ifq_stage_detach(&ifp->if_snd);
998 for (q = 0; q < ifp->if_snd.altq_subq_cnt; ++q) {
999 struct ifaltq_subque *ifsq = &ifp->if_snd.altq_subq[q];
1001 kfree(ifsq->ifsq_ifstart_nmsg, M_LWKTMSG);
1002 kfree(ifsq->ifsq_stage, M_DEVBUF);
1004 kfree(ifp->if_snd.altq_subq, M_DEVBUF);
1006 kfree(ifp->if_data_pcpu, M_DEVBUF);
1012 * Create interface group without members
1015 if_creategroup(const char *groupname)
1017 struct ifg_group *ifg = NULL;
1019 if ((ifg = (struct ifg_group *)kmalloc(sizeof(struct ifg_group),
1020 M_TEMP, M_NOWAIT)) == NULL)
1023 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group));
1024 ifg->ifg_refcnt = 0;
1025 ifg->ifg_carp_demoted = 0;
1026 TAILQ_INIT(&ifg->ifg_members);
1028 pfi_attach_ifgroup(ifg);
1030 TAILQ_INSERT_TAIL(&ifg_head, ifg, ifg_next);
1036 * Add a group to an interface
1039 if_addgroup(struct ifnet *ifp, const char *groupname)
1041 struct ifg_list *ifgl;
1042 struct ifg_group *ifg = NULL;
1043 struct ifg_member *ifgm;
1045 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' &&
1046 groupname[strlen(groupname) - 1] <= '9')
1049 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1050 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname))
1053 if ((ifgl = kmalloc(sizeof(*ifgl), M_TEMP, M_NOWAIT)) == NULL)
1056 if ((ifgm = kmalloc(sizeof(*ifgm), M_TEMP, M_NOWAIT)) == NULL) {
1057 kfree(ifgl, M_TEMP);
1061 TAILQ_FOREACH(ifg, &ifg_head, ifg_next)
1062 if (!strcmp(ifg->ifg_group, groupname))
1065 if (ifg == NULL && (ifg = if_creategroup(groupname)) == NULL) {
1066 kfree(ifgl, M_TEMP);
1067 kfree(ifgm, M_TEMP);
1072 ifgl->ifgl_group = ifg;
1073 ifgm->ifgm_ifp = ifp;
1075 TAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next);
1076 TAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next);
1079 pfi_group_change(groupname);
1086 * Remove a group from an interface
1089 if_delgroup(struct ifnet *ifp, const char *groupname)
1091 struct ifg_list *ifgl;
1092 struct ifg_member *ifgm;
1094 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1095 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname))
1100 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next);
1102 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next)
1103 if (ifgm->ifgm_ifp == ifp)
1107 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifgm_next);
1108 kfree(ifgm, M_TEMP);
1111 if (--ifgl->ifgl_group->ifg_refcnt == 0) {
1112 TAILQ_REMOVE(&ifg_head, ifgl->ifgl_group, ifg_next);
1114 pfi_detach_ifgroup(ifgl->ifgl_group);
1116 kfree(ifgl->ifgl_group, M_TEMP);
1119 kfree(ifgl, M_TEMP);
1122 pfi_group_change(groupname);
1129 * Stores all groups from an interface in memory pointed
1133 if_getgroup(caddr_t data, struct ifnet *ifp)
1136 struct ifg_list *ifgl;
1137 struct ifg_req ifgrq, *ifgp;
1138 struct ifgroupreq *ifgr = (struct ifgroupreq *)data;
1140 if (ifgr->ifgr_len == 0) {
1141 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1142 ifgr->ifgr_len += sizeof(struct ifg_req);
1146 len = ifgr->ifgr_len;
1147 ifgp = ifgr->ifgr_groups;
1148 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) {
1149 if (len < sizeof(ifgrq))
1151 bzero(&ifgrq, sizeof ifgrq);
1152 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group,
1153 sizeof(ifgrq.ifgrq_group));
1154 if ((error = copyout((caddr_t)&ifgrq, (caddr_t)ifgp,
1155 sizeof(struct ifg_req))))
1157 len -= sizeof(ifgrq);
1165 * Stores all members of a group in memory pointed to by data
1168 if_getgroupmembers(caddr_t data)
1170 struct ifgroupreq *ifgr = (struct ifgroupreq *)data;
1171 struct ifg_group *ifg;
1172 struct ifg_member *ifgm;
1173 struct ifg_req ifgrq, *ifgp;
1176 TAILQ_FOREACH(ifg, &ifg_head, ifg_next)
1177 if (!strcmp(ifg->ifg_group, ifgr->ifgr_name))
1182 if (ifgr->ifgr_len == 0) {
1183 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next)
1184 ifgr->ifgr_len += sizeof(ifgrq);
1188 len = ifgr->ifgr_len;
1189 ifgp = ifgr->ifgr_groups;
1190 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) {
1191 if (len < sizeof(ifgrq))
1193 bzero(&ifgrq, sizeof ifgrq);
1194 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname,
1195 sizeof(ifgrq.ifgrq_member));
1196 if ((error = copyout((caddr_t)&ifgrq, (caddr_t)ifgp,
1197 sizeof(struct ifg_req))))
1199 len -= sizeof(ifgrq);
1207 * Delete Routes for a Network Interface
1209 * Called for each routing entry via the rnh->rnh_walktree() call above
1210 * to delete all route entries referencing a detaching network interface.
1213 * rn pointer to node in the routing table
1214 * arg argument passed to rnh->rnh_walktree() - detaching interface
1218 * errno failed - reason indicated
1222 if_rtdel(struct radix_node *rn, void *arg)
1224 struct rtentry *rt = (struct rtentry *)rn;
1225 struct ifnet *ifp = arg;
1228 if (rt->rt_ifp == ifp) {
1231 * Protect (sorta) against walktree recursion problems
1232 * with cloned routes
1234 if (!(rt->rt_flags & RTF_UP))
1237 err = rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway,
1238 rt_mask(rt), rt->rt_flags,
1241 log(LOG_WARNING, "if_rtdel: error %d\n", err);
1249 * Locate an interface based on a complete address.
1252 ifa_ifwithaddr(struct sockaddr *addr)
1254 const struct ifnet_array *arr;
1257 arr = ifnet_array_get();
1258 for (i = 0; i < arr->ifnet_count; ++i) {
1259 struct ifnet *ifp = arr->ifnet_arr[i];
1260 struct ifaddr_container *ifac;
1262 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1263 struct ifaddr *ifa = ifac->ifa;
1265 if (ifa->ifa_addr->sa_family != addr->sa_family)
1267 if (sa_equal(addr, ifa->ifa_addr))
1269 if ((ifp->if_flags & IFF_BROADCAST) &&
1270 ifa->ifa_broadaddr &&
1271 /* IPv6 doesn't have broadcast */
1272 ifa->ifa_broadaddr->sa_len != 0 &&
1273 sa_equal(ifa->ifa_broadaddr, addr))
1280 * Locate the point to point interface with a given destination address.
1283 ifa_ifwithdstaddr(struct sockaddr *addr)
1285 const struct ifnet_array *arr;
1288 arr = ifnet_array_get();
1289 for (i = 0; i < arr->ifnet_count; ++i) {
1290 struct ifnet *ifp = arr->ifnet_arr[i];
1291 struct ifaddr_container *ifac;
1293 if (!(ifp->if_flags & IFF_POINTOPOINT))
1296 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1297 struct ifaddr *ifa = ifac->ifa;
1299 if (ifa->ifa_addr->sa_family != addr->sa_family)
1301 if (ifa->ifa_dstaddr &&
1302 sa_equal(addr, ifa->ifa_dstaddr))
1310 * Find an interface on a specific network. If many, choice
1311 * is most specific found.
1314 ifa_ifwithnet(struct sockaddr *addr)
1316 struct ifaddr *ifa_maybe = NULL;
1317 u_int af = addr->sa_family;
1318 char *addr_data = addr->sa_data, *cplim;
1319 const struct ifnet_array *arr;
1323 * AF_LINK addresses can be looked up directly by their index number,
1324 * so do that if we can.
1326 if (af == AF_LINK) {
1327 struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr;
1329 if (sdl->sdl_index && sdl->sdl_index <= if_index)
1330 return (ifindex2ifnet[sdl->sdl_index]->if_lladdr);
1334 * Scan though each interface, looking for ones that have
1335 * addresses in this address family.
1337 arr = ifnet_array_get();
1338 for (i = 0; i < arr->ifnet_count; ++i) {
1339 struct ifnet *ifp = arr->ifnet_arr[i];
1340 struct ifaddr_container *ifac;
1342 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1343 struct ifaddr *ifa = ifac->ifa;
1344 char *cp, *cp2, *cp3;
1346 if (ifa->ifa_addr->sa_family != af)
1348 if (af == AF_INET && ifp->if_flags & IFF_POINTOPOINT) {
1350 * This is a bit broken as it doesn't
1351 * take into account that the remote end may
1352 * be a single node in the network we are
1354 * The trouble is that we don't know the
1355 * netmask for the remote end.
1357 if (ifa->ifa_dstaddr != NULL &&
1358 sa_equal(addr, ifa->ifa_dstaddr))
1362 * if we have a special address handler,
1363 * then use it instead of the generic one.
1365 if (ifa->ifa_claim_addr) {
1366 if ((*ifa->ifa_claim_addr)(ifa, addr)) {
1374 * Scan all the bits in the ifa's address.
1375 * If a bit dissagrees with what we are
1376 * looking for, mask it with the netmask
1377 * to see if it really matters.
1378 * (A byte at a time)
1380 if (ifa->ifa_netmask == 0)
1383 cp2 = ifa->ifa_addr->sa_data;
1384 cp3 = ifa->ifa_netmask->sa_data;
1385 cplim = ifa->ifa_netmask->sa_len +
1386 (char *)ifa->ifa_netmask;
1388 if ((*cp++ ^ *cp2++) & *cp3++)
1389 goto next; /* next address! */
1391 * If the netmask of what we just found
1392 * is more specific than what we had before
1393 * (if we had one) then remember the new one
1394 * before continuing to search
1395 * for an even better one.
1397 if (ifa_maybe == NULL ||
1398 rn_refines((char *)ifa->ifa_netmask,
1399 (char *)ifa_maybe->ifa_netmask))
1408 * Find an interface address specific to an interface best matching
1412 ifaof_ifpforaddr(struct sockaddr *addr, struct ifnet *ifp)
1414 struct ifaddr_container *ifac;
1415 char *cp, *cp2, *cp3;
1417 struct ifaddr *ifa_maybe = NULL;
1418 u_int af = addr->sa_family;
1422 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1423 struct ifaddr *ifa = ifac->ifa;
1425 if (ifa->ifa_addr->sa_family != af)
1427 if (ifa_maybe == NULL)
1429 if (ifa->ifa_netmask == NULL) {
1430 if (sa_equal(addr, ifa->ifa_addr) ||
1431 (ifa->ifa_dstaddr != NULL &&
1432 sa_equal(addr, ifa->ifa_dstaddr)))
1436 if (ifp->if_flags & IFF_POINTOPOINT) {
1437 if (sa_equal(addr, ifa->ifa_dstaddr))
1441 cp2 = ifa->ifa_addr->sa_data;
1442 cp3 = ifa->ifa_netmask->sa_data;
1443 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
1444 for (; cp3 < cplim; cp3++)
1445 if ((*cp++ ^ *cp2++) & *cp3)
1455 * Default action when installing a route with a Link Level gateway.
1456 * Lookup an appropriate real ifa to point to.
1457 * This should be moved to /sys/net/link.c eventually.
1460 link_rtrequest(int cmd, struct rtentry *rt)
1463 struct sockaddr *dst;
1466 if (cmd != RTM_ADD || (ifa = rt->rt_ifa) == NULL ||
1467 (ifp = ifa->ifa_ifp) == NULL || (dst = rt_key(rt)) == NULL)
1469 ifa = ifaof_ifpforaddr(dst, ifp);
1471 IFAFREE(rt->rt_ifa);
1474 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest)
1475 ifa->ifa_rtrequest(cmd, rt);
1479 struct netmsg_ifroute {
1480 struct netmsg_base base;
1487 * Mark an interface down and notify protocols of the transition.
1490 if_unroute_dispatch(netmsg_t nmsg)
1492 struct netmsg_ifroute *msg = (struct netmsg_ifroute *)nmsg;
1493 struct ifnet *ifp = msg->ifp;
1494 int flag = msg->flag, fam = msg->fam;
1495 struct ifaddr_container *ifac;
1497 ifp->if_flags &= ~flag;
1498 getmicrotime(&ifp->if_lastchange);
1500 * The ifaddr processing in the following loop will block,
1501 * however, this function is called in netisr0, in which
1502 * ifaddr list changes happen, so we don't care about the
1503 * blockness of the ifaddr processing here.
1505 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1506 struct ifaddr *ifa = ifac->ifa;
1509 if (ifa->ifa_addr->sa_family == AF_UNSPEC)
1512 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
1513 kpfctlinput(PRC_IFDOWN, ifa->ifa_addr);
1515 ifq_purge_all(&ifp->if_snd);
1518 lwkt_replymsg(&nmsg->lmsg, 0);
1522 if_unroute(struct ifnet *ifp, int flag, int fam)
1524 struct netmsg_ifroute msg;
1526 ASSERT_CANDOMSG_NETISR0(curthread);
1528 netmsg_init(&msg.base, NULL, &curthread->td_msgport, 0,
1529 if_unroute_dispatch);
1533 lwkt_domsg(netisr_cpuport(0), &msg.base.lmsg, 0);
1537 * Mark an interface up and notify protocols of the transition.
1540 if_route_dispatch(netmsg_t nmsg)
1542 struct netmsg_ifroute *msg = (struct netmsg_ifroute *)nmsg;
1543 struct ifnet *ifp = msg->ifp;
1544 int flag = msg->flag, fam = msg->fam;
1545 struct ifaddr_container *ifac;
1547 ifq_purge_all(&ifp->if_snd);
1548 ifp->if_flags |= flag;
1549 getmicrotime(&ifp->if_lastchange);
1551 * The ifaddr processing in the following loop will block,
1552 * however, this function is called in netisr0, in which
1553 * ifaddr list changes happen, so we don't care about the
1554 * blockness of the ifaddr processing here.
1556 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1557 struct ifaddr *ifa = ifac->ifa;
1560 if (ifa->ifa_addr->sa_family == AF_UNSPEC)
1563 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
1564 kpfctlinput(PRC_IFUP, ifa->ifa_addr);
1571 lwkt_replymsg(&nmsg->lmsg, 0);
1575 if_route(struct ifnet *ifp, int flag, int fam)
1577 struct netmsg_ifroute msg;
1579 ASSERT_CANDOMSG_NETISR0(curthread);
1581 netmsg_init(&msg.base, NULL, &curthread->td_msgport, 0,
1586 lwkt_domsg(netisr_cpuport(0), &msg.base.lmsg, 0);
1590 * Mark an interface down and notify protocols of the transition. An
1591 * interface going down is also considered to be a synchronizing event.
1592 * We must ensure that all packet processing related to the interface
1593 * has completed before we return so e.g. the caller can free the ifnet
1594 * structure that the mbufs may be referencing.
1596 * NOTE: must be called at splnet or eqivalent.
1599 if_down(struct ifnet *ifp)
1601 if_unroute(ifp, IFF_UP, AF_UNSPEC);
1602 netmsg_service_sync();
1606 * Mark an interface up and notify protocols of
1608 * NOTE: must be called at splnet or eqivalent.
1611 if_up(struct ifnet *ifp)
1613 if_route(ifp, IFF_UP, AF_UNSPEC);
1617 * Process a link state change.
1618 * NOTE: must be called at splsoftnet or equivalent.
1621 if_link_state_change(struct ifnet *ifp)
1623 int link_state = ifp->if_link_state;
1626 devctl_notify("IFNET", ifp->if_xname,
1627 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN", NULL);
1631 * Handle interface watchdog timer routines. Called
1632 * from softclock, we decrement timers (if set) and
1633 * call the appropriate interface routine on expiration.
1636 if_slowtimo_dispatch(netmsg_t nmsg)
1638 struct globaldata *gd = mycpu;
1639 const struct ifnet_array *arr;
1642 KASSERT(&curthread->td_msgport == netisr_cpuport(0),
1643 ("not in netisr0"));
1646 lwkt_replymsg(&nmsg->lmsg, 0); /* reply ASAP */
1649 arr = ifnet_array_get();
1650 for (i = 0; i < arr->ifnet_count; ++i) {
1651 struct ifnet *ifp = arr->ifnet_arr[i];
1655 if (if_stats_compat) {
1656 IFNET_STAT_GET(ifp, ipackets, ifp->if_ipackets);
1657 IFNET_STAT_GET(ifp, ierrors, ifp->if_ierrors);
1658 IFNET_STAT_GET(ifp, opackets, ifp->if_opackets);
1659 IFNET_STAT_GET(ifp, oerrors, ifp->if_oerrors);
1660 IFNET_STAT_GET(ifp, collisions, ifp->if_collisions);
1661 IFNET_STAT_GET(ifp, ibytes, ifp->if_ibytes);
1662 IFNET_STAT_GET(ifp, obytes, ifp->if_obytes);
1663 IFNET_STAT_GET(ifp, imcasts, ifp->if_imcasts);
1664 IFNET_STAT_GET(ifp, omcasts, ifp->if_omcasts);
1665 IFNET_STAT_GET(ifp, iqdrops, ifp->if_iqdrops);
1666 IFNET_STAT_GET(ifp, noproto, ifp->if_noproto);
1669 if (ifp->if_timer == 0 || --ifp->if_timer) {
1673 if (ifp->if_watchdog) {
1674 if (ifnet_tryserialize_all(ifp)) {
1675 (*ifp->if_watchdog)(ifp);
1676 ifnet_deserialize_all(ifp);
1678 /* try again next timeout */
1686 callout_reset(&if_slowtimo_timer, hz / IFNET_SLOWHZ, if_slowtimo, NULL);
1690 if_slowtimo(void *arg __unused)
1692 struct lwkt_msg *lmsg = &if_slowtimo_netmsg.lmsg;
1694 KASSERT(mycpuid == 0, ("not on cpu0"));
1696 if (lmsg->ms_flags & MSGF_DONE)
1697 lwkt_sendmsg_oncpu(netisr_cpuport(0), lmsg);
1702 * Map interface name to
1703 * interface structure pointer.
1706 ifunit(const char *name)
1711 * Search all the interfaces for this name/number
1713 KASSERT(mtx_owned(&ifnet_mtx), ("ifnet is not locked"));
1715 TAILQ_FOREACH(ifp, &ifnetlist, if_link) {
1716 if (strncmp(ifp->if_xname, name, IFNAMSIZ) == 0)
1723 ifunit_netisr(const char *name)
1725 const struct ifnet_array *arr;
1729 * Search all the interfaces for this name/number
1732 arr = ifnet_array_get();
1733 for (i = 0; i < arr->ifnet_count; ++i) {
1734 struct ifnet *ifp = arr->ifnet_arr[i];
1736 if (strncmp(ifp->if_xname, name, IFNAMSIZ) == 0)
1746 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct ucred *cred)
1757 size_t namelen, onamelen;
1758 char new_name[IFNAMSIZ];
1760 struct sockaddr_dl *sdl;
1765 return (ifconf(cmd, data, cred));
1770 ifr = (struct ifreq *)data;
1775 if ((error = priv_check_cred(cred, PRIV_ROOT, 0)) != 0)
1777 return (if_clone_create(ifr->ifr_name, sizeof(ifr->ifr_name),
1778 cmd == SIOCIFCREATE2 ? ifr->ifr_data : NULL));
1780 if ((error = priv_check_cred(cred, PRIV_ROOT, 0)) != 0)
1782 return (if_clone_destroy(ifr->ifr_name));
1783 case SIOCIFGCLONERS:
1784 return (if_clone_list((struct if_clonereq *)data));
1790 * Nominal ioctl through interface, lookup the ifp and obtain a
1791 * lock to serialize the ifconfig ioctl operation.
1795 ifp = ifunit(ifr->ifr_name);
1804 ifr->ifr_index = ifp->if_index;
1808 ifr->ifr_flags = ifp->if_flags;
1809 ifr->ifr_flagshigh = ifp->if_flags >> 16;
1813 ifr->ifr_reqcap = ifp->if_capabilities;
1814 ifr->ifr_curcap = ifp->if_capenable;
1818 ifr->ifr_metric = ifp->if_metric;
1822 ifr->ifr_mtu = ifp->if_mtu;
1826 ifr->ifr_tsolen = ifp->if_tsolen;
1830 error = copyout((caddr_t)&ifp->if_data, ifr->ifr_data,
1831 sizeof(ifp->if_data));
1835 ifr->ifr_phys = ifp->if_physical;
1838 case SIOCGIFPOLLCPU:
1839 ifr->ifr_pollcpu = -1;
1842 case SIOCSIFPOLLCPU:
1846 error = priv_check_cred(cred, PRIV_ROOT, 0);
1849 new_flags = (ifr->ifr_flags & 0xffff) |
1850 (ifr->ifr_flagshigh << 16);
1851 if (ifp->if_flags & IFF_SMART) {
1852 /* Smart drivers twiddle their own routes */
1853 } else if (ifp->if_flags & IFF_UP &&
1854 (new_flags & IFF_UP) == 0) {
1858 } else if (new_flags & IFF_UP &&
1859 (ifp->if_flags & IFF_UP) == 0) {
1865 #ifdef IFPOLL_ENABLE
1866 if ((new_flags ^ ifp->if_flags) & IFF_NPOLLING) {
1867 if (new_flags & IFF_NPOLLING)
1868 ifpoll_register(ifp);
1870 ifpoll_deregister(ifp);
1874 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
1875 (new_flags &~ IFF_CANTCHANGE);
1876 if (new_flags & IFF_PPROMISC) {
1877 /* Permanently promiscuous mode requested */
1878 ifp->if_flags |= IFF_PROMISC;
1879 } else if (ifp->if_pcount == 0) {
1880 ifp->if_flags &= ~IFF_PROMISC;
1882 if (ifp->if_ioctl) {
1883 ifnet_serialize_all(ifp);
1884 ifp->if_ioctl(ifp, cmd, data, cred);
1885 ifnet_deserialize_all(ifp);
1887 getmicrotime(&ifp->if_lastchange);
1891 error = priv_check_cred(cred, PRIV_ROOT, 0);
1894 if (ifr->ifr_reqcap & ~ifp->if_capabilities) {
1898 ifnet_serialize_all(ifp);
1899 ifp->if_ioctl(ifp, cmd, data, cred);
1900 ifnet_deserialize_all(ifp);
1904 error = priv_check_cred(cred, PRIV_ROOT, 0);
1907 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL);
1910 if (new_name[0] == '\0') {
1914 if (ifunit(new_name) != NULL) {
1919 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp);
1921 /* Announce the departure of the interface. */
1922 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
1924 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname));
1925 ifa = TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa;
1926 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
1927 namelen = strlen(new_name);
1928 onamelen = sdl->sdl_nlen;
1930 * Move the address if needed. This is safe because we
1931 * allocate space for a name of length IFNAMSIZ when we
1932 * create this in if_attach().
1934 if (namelen != onamelen) {
1935 bcopy(sdl->sdl_data + onamelen,
1936 sdl->sdl_data + namelen, sdl->sdl_alen);
1938 bcopy(new_name, sdl->sdl_data, namelen);
1939 sdl->sdl_nlen = namelen;
1940 sdl = (struct sockaddr_dl *)ifa->ifa_netmask;
1941 bzero(sdl->sdl_data, onamelen);
1942 while (namelen != 0)
1943 sdl->sdl_data[--namelen] = 0xff;
1945 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp);
1947 /* Announce the return of the interface. */
1948 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
1952 error = priv_check_cred(cred, PRIV_ROOT, 0);
1955 ifp->if_metric = ifr->ifr_metric;
1956 getmicrotime(&ifp->if_lastchange);
1960 error = priv_check_cred(cred, PRIV_ROOT, 0);
1963 if (ifp->if_ioctl == NULL) {
1967 ifnet_serialize_all(ifp);
1968 error = ifp->if_ioctl(ifp, cmd, data, cred);
1969 ifnet_deserialize_all(ifp);
1971 getmicrotime(&ifp->if_lastchange);
1976 u_long oldmtu = ifp->if_mtu;
1978 error = priv_check_cred(cred, PRIV_ROOT, 0);
1981 if (ifp->if_ioctl == NULL) {
1985 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU) {
1989 ifnet_serialize_all(ifp);
1990 error = ifp->if_ioctl(ifp, cmd, data, cred);
1991 ifnet_deserialize_all(ifp);
1993 getmicrotime(&ifp->if_lastchange);
1997 * If the link MTU changed, do network layer specific procedure.
1999 if (ifp->if_mtu != oldmtu) {
2008 error = priv_check_cred(cred, PRIV_ROOT, 0);
2012 /* XXX need driver supplied upper limit */
2013 if (ifr->ifr_tsolen <= 0) {
2017 ifp->if_tsolen = ifr->ifr_tsolen;
2022 error = priv_check_cred(cred, PRIV_ROOT, 0);
2026 /* Don't allow group membership on non-multicast interfaces. */
2027 if ((ifp->if_flags & IFF_MULTICAST) == 0) {
2032 /* Don't let users screw up protocols' entries. */
2033 if (ifr->ifr_addr.sa_family != AF_LINK) {
2038 if (cmd == SIOCADDMULTI) {
2039 struct ifmultiaddr *ifma;
2040 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma);
2042 error = if_delmulti(ifp, &ifr->ifr_addr);
2045 getmicrotime(&ifp->if_lastchange);
2048 case SIOCSIFPHYADDR:
2049 case SIOCDIFPHYADDR:
2051 case SIOCSIFPHYADDR_IN6:
2053 case SIOCSLIFPHYADDR:
2055 case SIOCSIFGENERIC:
2056 error = priv_check_cred(cred, PRIV_ROOT, 0);
2059 if (ifp->if_ioctl == 0) {
2063 ifnet_serialize_all(ifp);
2064 error = ifp->if_ioctl(ifp, cmd, data, cred);
2065 ifnet_deserialize_all(ifp);
2067 getmicrotime(&ifp->if_lastchange);
2071 ifs = (struct ifstat *)data;
2072 ifs->ascii[0] = '\0';
2074 case SIOCGIFPSRCADDR:
2075 case SIOCGIFPDSTADDR:
2076 case SIOCGLIFPHYADDR:
2078 case SIOCGIFGENERIC:
2079 if (ifp->if_ioctl == NULL) {
2083 ifnet_serialize_all(ifp);
2084 error = ifp->if_ioctl(ifp, cmd, data, cred);
2085 ifnet_deserialize_all(ifp);
2089 error = priv_check_cred(cred, PRIV_ROOT, 0);
2092 error = if_setlladdr(ifp, ifr->ifr_addr.sa_data,
2093 ifr->ifr_addr.sa_len);
2094 EVENTHANDLER_INVOKE(iflladdr_event, ifp);
2098 oif_flags = ifp->if_flags;
2099 if (so->so_proto == 0) {
2104 error = so_pru_control_direct(so, cmd, data, ifp);
2109 case SIOCSIFDSTADDR:
2111 case SIOCSIFBRDADDR:
2112 case SIOCSIFNETMASK:
2113 #if BYTE_ORDER != BIG_ENDIAN
2114 if (ifr->ifr_addr.sa_family == 0 &&
2115 ifr->ifr_addr.sa_len < 16) {
2116 ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len;
2117 ifr->ifr_addr.sa_len = 16;
2120 if (ifr->ifr_addr.sa_len == 0)
2121 ifr->ifr_addr.sa_len = 16;
2127 case OSIOCGIFDSTADDR:
2128 cmd = SIOCGIFDSTADDR;
2130 case OSIOCGIFBRDADDR:
2131 cmd = SIOCGIFBRDADDR;
2133 case OSIOCGIFNETMASK:
2134 cmd = SIOCGIFNETMASK;
2140 error = so_pru_control_direct(so, cmd, data, ifp);
2144 case OSIOCGIFDSTADDR:
2145 case OSIOCGIFBRDADDR:
2146 case OSIOCGIFNETMASK:
2147 *(u_short *)&ifr->ifr_addr = ifr->ifr_addr.sa_family;
2150 #endif /* COMPAT_43 */
2152 if ((oif_flags ^ ifp->if_flags) & IFF_UP) {
2154 DELAY(100);/* XXX: temporary workaround for fxp issue*/
2155 if (ifp->if_flags & IFF_UP) {
2170 * Set/clear promiscuous mode on interface ifp based on the truth value
2171 * of pswitch. The calls are reference counted so that only the first
2172 * "on" request actually has an effect, as does the final "off" request.
2173 * Results are undefined if the "off" and "on" requests are not matched.
2176 ifpromisc(struct ifnet *ifp, int pswitch)
2182 oldflags = ifp->if_flags;
2183 if (ifp->if_flags & IFF_PPROMISC) {
2184 /* Do nothing if device is in permanently promiscuous mode */
2185 ifp->if_pcount += pswitch ? 1 : -1;
2190 * If the device is not configured up, we cannot put it in
2193 if ((ifp->if_flags & IFF_UP) == 0)
2195 if (ifp->if_pcount++ != 0)
2197 ifp->if_flags |= IFF_PROMISC;
2198 log(LOG_INFO, "%s: promiscuous mode enabled\n",
2201 if (--ifp->if_pcount > 0)
2203 ifp->if_flags &= ~IFF_PROMISC;
2204 log(LOG_INFO, "%s: promiscuous mode disabled\n",
2207 ifr.ifr_flags = ifp->if_flags;
2208 ifr.ifr_flagshigh = ifp->if_flags >> 16;
2209 ifnet_serialize_all(ifp);
2210 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, NULL);
2211 ifnet_deserialize_all(ifp);
2215 ifp->if_flags = oldflags;
2220 * Return interface configuration
2221 * of system. List may be used
2222 * in later ioctl's (above) to get
2223 * other information.
2226 ifconf(u_long cmd, caddr_t data, struct ucred *cred)
2228 struct ifconf *ifc = (struct ifconf *)data;
2230 struct sockaddr *sa;
2231 struct ifreq ifr, *ifrp;
2232 int space = ifc->ifc_len, error = 0;
2234 ifrp = ifc->ifc_req;
2237 TAILQ_FOREACH(ifp, &ifnetlist, if_link) {
2238 struct ifaddr_container *ifac, *ifac_mark;
2239 struct ifaddr_marker mark;
2240 struct ifaddrhead *head;
2243 if (space <= sizeof ifr)
2247 * Zero the stack declared structure first to prevent
2248 * memory disclosure.
2250 bzero(&ifr, sizeof(ifr));
2251 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name))
2252 >= sizeof(ifr.ifr_name)) {
2253 error = ENAMETOOLONG;
2258 * Add a marker, since copyout() could block and during that
2259 * period the list could be changed. Inserting the marker to
2260 * the header of the list will not cause trouble for the code
2261 * assuming that the first element of the list is AF_LINK; the
2262 * marker will be moved to the next position w/o blocking.
2264 ifa_marker_init(&mark, ifp);
2265 ifac_mark = &mark.ifac;
2266 head = &ifp->if_addrheads[mycpuid];
2269 TAILQ_INSERT_HEAD(head, ifac_mark, ifa_link);
2270 while ((ifac = TAILQ_NEXT(ifac_mark, ifa_link)) != NULL) {
2271 struct ifaddr *ifa = ifac->ifa;
2273 TAILQ_REMOVE(head, ifac_mark, ifa_link);
2274 TAILQ_INSERT_AFTER(head, ifac, ifac_mark, ifa_link);
2277 if (ifa->ifa_addr->sa_family == AF_UNSPEC)
2280 if (space <= sizeof ifr)
2283 if (cred->cr_prison &&
2284 prison_if(cred, sa))
2288 * Keep a reference on this ifaddr, so that it will
2289 * not be destroyed when its address is copied to
2290 * the userland, which could block.
2294 if (cmd == OSIOCGIFCONF) {
2295 struct osockaddr *osa =
2296 (struct osockaddr *)&ifr.ifr_addr;
2298 osa->sa_family = sa->sa_family;
2299 error = copyout(&ifr, ifrp, sizeof ifr);
2303 if (sa->sa_len <= sizeof(*sa)) {
2305 error = copyout(&ifr, ifrp, sizeof ifr);
2308 if (space < (sizeof ifr) + sa->sa_len -
2313 space -= sa->sa_len - sizeof(*sa);
2314 error = copyout(&ifr, ifrp,
2315 sizeof ifr.ifr_name);
2317 error = copyout(sa, &ifrp->ifr_addr,
2319 ifrp = (struct ifreq *)
2320 (sa->sa_len + (caddr_t)&ifrp->ifr_addr);
2325 space -= sizeof ifr;
2327 TAILQ_REMOVE(head, ifac_mark, ifa_link);
2331 bzero(&ifr.ifr_addr, sizeof ifr.ifr_addr);
2332 error = copyout(&ifr, ifrp, sizeof ifr);
2335 space -= sizeof ifr;
2341 ifc->ifc_len -= space;
2346 * Just like if_promisc(), but for all-multicast-reception mode.
2349 if_allmulti(struct ifnet *ifp, int onswitch)
2357 if (ifp->if_amcount++ == 0) {
2358 ifp->if_flags |= IFF_ALLMULTI;
2359 ifr.ifr_flags = ifp->if_flags;
2360 ifr.ifr_flagshigh = ifp->if_flags >> 16;
2361 ifnet_serialize_all(ifp);
2362 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
2364 ifnet_deserialize_all(ifp);
2367 if (ifp->if_amcount > 1) {
2370 ifp->if_amcount = 0;
2371 ifp->if_flags &= ~IFF_ALLMULTI;
2372 ifr.ifr_flags = ifp->if_flags;
2373 ifr.ifr_flagshigh = ifp->if_flags >> 16;
2374 ifnet_serialize_all(ifp);
2375 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
2377 ifnet_deserialize_all(ifp);
2389 * Add a multicast listenership to the interface in question.
2390 * The link layer provides a routine which converts
2393 if_addmulti_serialized(struct ifnet *ifp, struct sockaddr *sa,
2394 struct ifmultiaddr **retifma)
2396 struct sockaddr *llsa, *dupsa;
2398 struct ifmultiaddr *ifma;
2400 ASSERT_IFNET_SERIALIZED_ALL(ifp);
2403 * If the matching multicast address already exists
2404 * then don't add a new one, just add a reference
2406 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
2407 if (sa_equal(sa, ifma->ifma_addr)) {
2408 ifma->ifma_refcount++;
2416 * Give the link layer a chance to accept/reject it, and also
2417 * find out which AF_LINK address this maps to, if it isn't one
2420 if (ifp->if_resolvemulti) {
2421 error = ifp->if_resolvemulti(ifp, &llsa, sa);
2428 ifma = kmalloc(sizeof *ifma, M_IFMADDR, M_WAITOK);
2429 dupsa = kmalloc(sa->sa_len, M_IFMADDR, M_WAITOK);
2430 bcopy(sa, dupsa, sa->sa_len);
2432 ifma->ifma_addr = dupsa;
2433 ifma->ifma_lladdr = llsa;
2434 ifma->ifma_ifp = ifp;
2435 ifma->ifma_refcount = 1;
2436 ifma->ifma_protospec = NULL;
2437 rt_newmaddrmsg(RTM_NEWMADDR, ifma);
2439 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
2444 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
2445 if (sa_equal(ifma->ifma_addr, llsa))
2449 ifma->ifma_refcount++;
2451 ifma = kmalloc(sizeof *ifma, M_IFMADDR, M_WAITOK);
2452 dupsa = kmalloc(llsa->sa_len, M_IFMADDR, M_WAITOK);
2453 bcopy(llsa, dupsa, llsa->sa_len);
2454 ifma->ifma_addr = dupsa;
2455 ifma->ifma_ifp = ifp;
2456 ifma->ifma_refcount = 1;
2457 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
2461 * We are certain we have added something, so call down to the
2462 * interface to let them know about it.
2465 ifp->if_ioctl(ifp, SIOCADDMULTI, 0, NULL);
2471 if_addmulti(struct ifnet *ifp, struct sockaddr *sa,
2472 struct ifmultiaddr **retifma)
2476 ifnet_serialize_all(ifp);
2477 error = if_addmulti_serialized(ifp, sa, retifma);
2478 ifnet_deserialize_all(ifp);
2484 * Remove a reference to a multicast address on this interface. Yell
2485 * if the request does not match an existing membership.
2488 if_delmulti_serialized(struct ifnet *ifp, struct sockaddr *sa)
2490 struct ifmultiaddr *ifma;
2492 ASSERT_IFNET_SERIALIZED_ALL(ifp);
2494 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
2495 if (sa_equal(sa, ifma->ifma_addr))
2500 if (ifma->ifma_refcount > 1) {
2501 ifma->ifma_refcount--;
2505 rt_newmaddrmsg(RTM_DELMADDR, ifma);
2506 sa = ifma->ifma_lladdr;
2507 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link);
2509 * Make sure the interface driver is notified
2510 * in the case of a link layer mcast group being left.
2512 if (ifma->ifma_addr->sa_family == AF_LINK && sa == NULL)
2513 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, NULL);
2514 kfree(ifma->ifma_addr, M_IFMADDR);
2515 kfree(ifma, M_IFMADDR);
2520 * Now look for the link-layer address which corresponds to
2521 * this network address. It had been squirreled away in
2522 * ifma->ifma_lladdr for this purpose (so we don't have
2523 * to call ifp->if_resolvemulti() again), and we saved that
2524 * value in sa above. If some nasty deleted the
2525 * link-layer address out from underneath us, we can deal because
2526 * the address we stored was is not the same as the one which was
2527 * in the record for the link-layer address. (So we don't complain
2530 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
2531 if (sa_equal(sa, ifma->ifma_addr))
2536 if (ifma->ifma_refcount > 1) {
2537 ifma->ifma_refcount--;
2541 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link);
2542 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, NULL);
2543 kfree(ifma->ifma_addr, M_IFMADDR);
2544 kfree(sa, M_IFMADDR);
2545 kfree(ifma, M_IFMADDR);
2551 if_delmulti(struct ifnet *ifp, struct sockaddr *sa)
2555 ifnet_serialize_all(ifp);
2556 error = if_delmulti_serialized(ifp, sa);
2557 ifnet_deserialize_all(ifp);
2563 * Delete all multicast group membership for an interface.
2564 * Should be used to quickly flush all multicast filters.
2567 if_delallmulti_serialized(struct ifnet *ifp)
2569 struct ifmultiaddr *ifma, mark;
2572 ASSERT_IFNET_SERIALIZED_ALL(ifp);
2574 bzero(&sa, sizeof(sa));
2575 sa.sa_family = AF_UNSPEC;
2576 sa.sa_len = sizeof(sa);
2578 bzero(&mark, sizeof(mark));
2579 mark.ifma_addr = &sa;
2581 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, &mark, ifma_link);
2582 while ((ifma = TAILQ_NEXT(&mark, ifma_link)) != NULL) {
2583 TAILQ_REMOVE(&ifp->if_multiaddrs, &mark, ifma_link);
2584 TAILQ_INSERT_AFTER(&ifp->if_multiaddrs, ifma, &mark,
2587 if (ifma->ifma_addr->sa_family == AF_UNSPEC)
2590 if_delmulti_serialized(ifp, ifma->ifma_addr);
2592 TAILQ_REMOVE(&ifp->if_multiaddrs, &mark, ifma_link);
2597 * Set the link layer address on an interface.
2599 * At this time we only support certain types of interfaces,
2600 * and we don't allow the length of the address to change.
2603 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len)
2605 struct sockaddr_dl *sdl;
2608 sdl = IF_LLSOCKADDR(ifp);
2611 if (len != sdl->sdl_alen) /* don't allow length to change */
2613 switch (ifp->if_type) {
2614 case IFT_ETHER: /* these types use struct arpcom */
2617 case IFT_IEEE8023ADLAG:
2618 bcopy(lladdr, ((struct arpcom *)ifp->if_softc)->ac_enaddr, len);
2619 bcopy(lladdr, LLADDR(sdl), len);
2625 * If the interface is already up, we need
2626 * to re-init it in order to reprogram its
2629 ifnet_serialize_all(ifp);
2630 if ((ifp->if_flags & IFF_UP) != 0) {
2632 struct ifaddr_container *ifac;
2635 ifp->if_flags &= ~IFF_UP;
2636 ifr.ifr_flags = ifp->if_flags;
2637 ifr.ifr_flagshigh = ifp->if_flags >> 16;
2638 ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
2640 ifp->if_flags |= IFF_UP;
2641 ifr.ifr_flags = ifp->if_flags;
2642 ifr.ifr_flagshigh = ifp->if_flags >> 16;
2643 ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
2647 * Also send gratuitous ARPs to notify other nodes about
2648 * the address change.
2650 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
2651 struct ifaddr *ifa = ifac->ifa;
2653 if (ifa->ifa_addr != NULL &&
2654 ifa->ifa_addr->sa_family == AF_INET)
2655 arp_gratuitous(ifp, ifa);
2659 ifnet_deserialize_all(ifp);
2663 struct ifmultiaddr *
2664 ifmaof_ifpforaddr(struct sockaddr *sa, struct ifnet *ifp)
2666 struct ifmultiaddr *ifma;
2668 /* TODO: need ifnet_serialize_main */
2669 ifnet_serialize_all(ifp);
2670 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
2671 if (sa_equal(ifma->ifma_addr, sa))
2673 ifnet_deserialize_all(ifp);
2679 * This function locates the first real ethernet MAC from a network
2680 * card and loads it into node, returning 0 on success or ENOENT if
2681 * no suitable interfaces were found. It is used by the uuid code to
2682 * generate a unique 6-byte number.
2685 if_getanyethermac(uint16_t *node, int minlen)
2688 struct sockaddr_dl *sdl;
2691 TAILQ_FOREACH(ifp, &ifnetlist, if_link) {
2692 if (ifp->if_type != IFT_ETHER)
2694 sdl = IF_LLSOCKADDR(ifp);
2695 if (sdl->sdl_alen < minlen)
2697 bcopy(((struct arpcom *)ifp->if_softc)->ac_enaddr, node,
2707 * The name argument must be a pointer to storage which will last as
2708 * long as the interface does. For physical devices, the result of
2709 * device_get_name(dev) is a good choice and for pseudo-devices a
2710 * static string works well.
2713 if_initname(struct ifnet *ifp, const char *name, int unit)
2715 ifp->if_dname = name;
2716 ifp->if_dunit = unit;
2717 if (unit != IF_DUNIT_NONE)
2718 ksnprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit);
2720 strlcpy(ifp->if_xname, name, IFNAMSIZ);
2724 if_printf(struct ifnet *ifp, const char *fmt, ...)
2729 retval = kprintf("%s: ", ifp->if_xname);
2730 __va_start(ap, fmt);
2731 retval += kvprintf(fmt, ap);
2737 if_alloc(uint8_t type)
2743 * XXX temporary hack until arpcom is setup in if_l2com
2745 if (type == IFT_ETHER)
2746 size = sizeof(struct arpcom);
2748 size = sizeof(struct ifnet);
2750 ifp = kmalloc(size, M_IFNET, M_WAITOK|M_ZERO);
2752 ifp->if_type = type;
2754 if (if_com_alloc[type] != NULL) {
2755 ifp->if_l2com = if_com_alloc[type](type, ifp);
2756 if (ifp->if_l2com == NULL) {
2757 kfree(ifp, M_IFNET);
2765 if_free(struct ifnet *ifp)
2767 kfree(ifp, M_IFNET);
2771 ifq_set_classic(struct ifaltq *ifq)
2773 ifq_set_methods(ifq, ifq->altq_ifp->if_mapsubq,
2774 ifsq_classic_enqueue, ifsq_classic_dequeue, ifsq_classic_request);
2778 ifq_set_methods(struct ifaltq *ifq, altq_mapsubq_t mapsubq,
2779 ifsq_enqueue_t enqueue, ifsq_dequeue_t dequeue, ifsq_request_t request)
2783 KASSERT(mapsubq != NULL, ("mapsubq is not specified"));
2784 KASSERT(enqueue != NULL, ("enqueue is not specified"));
2785 KASSERT(dequeue != NULL, ("dequeue is not specified"));
2786 KASSERT(request != NULL, ("request is not specified"));
2788 ifq->altq_mapsubq = mapsubq;
2789 for (q = 0; q < ifq->altq_subq_cnt; ++q) {
2790 struct ifaltq_subque *ifsq = &ifq->altq_subq[q];
2792 ifsq->ifsq_enqueue = enqueue;
2793 ifsq->ifsq_dequeue = dequeue;
2794 ifsq->ifsq_request = request;
2799 ifsq_norm_enqueue(struct ifaltq_subque *ifsq, struct mbuf *m)
2801 m->m_nextpkt = NULL;
2802 if (ifsq->ifsq_norm_tail == NULL)
2803 ifsq->ifsq_norm_head = m;
2805 ifsq->ifsq_norm_tail->m_nextpkt = m;
2806 ifsq->ifsq_norm_tail = m;
2807 ALTQ_SQ_CNTR_INC(ifsq, m->m_pkthdr.len);
2811 ifsq_prio_enqueue(struct ifaltq_subque *ifsq, struct mbuf *m)
2813 m->m_nextpkt = NULL;
2814 if (ifsq->ifsq_prio_tail == NULL)
2815 ifsq->ifsq_prio_head = m;
2817 ifsq->ifsq_prio_tail->m_nextpkt = m;
2818 ifsq->ifsq_prio_tail = m;
2819 ALTQ_SQ_CNTR_INC(ifsq, m->m_pkthdr.len);
2820 ALTQ_SQ_PRIO_CNTR_INC(ifsq, m->m_pkthdr.len);
2823 static struct mbuf *
2824 ifsq_norm_dequeue(struct ifaltq_subque *ifsq)
2828 m = ifsq->ifsq_norm_head;
2830 if ((ifsq->ifsq_norm_head = m->m_nextpkt) == NULL)
2831 ifsq->ifsq_norm_tail = NULL;
2832 m->m_nextpkt = NULL;
2833 ALTQ_SQ_CNTR_DEC(ifsq, m->m_pkthdr.len);
2838 static struct mbuf *
2839 ifsq_prio_dequeue(struct ifaltq_subque *ifsq)
2843 m = ifsq->ifsq_prio_head;
2845 if ((ifsq->ifsq_prio_head = m->m_nextpkt) == NULL)
2846 ifsq->ifsq_prio_tail = NULL;
2847 m->m_nextpkt = NULL;
2848 ALTQ_SQ_CNTR_DEC(ifsq, m->m_pkthdr.len);
2849 ALTQ_SQ_PRIO_CNTR_DEC(ifsq, m->m_pkthdr.len);
2855 ifsq_classic_enqueue(struct ifaltq_subque *ifsq, struct mbuf *m,
2856 struct altq_pktattr *pa __unused)
2859 if (ifsq->ifsq_len >= ifsq->ifsq_maxlen ||
2860 ifsq->ifsq_bcnt >= ifsq->ifsq_maxbcnt) {
2861 if ((m->m_flags & M_PRIO) &&
2862 ifsq->ifsq_prio_len < (ifsq->ifsq_maxlen / 2) &&
2863 ifsq->ifsq_prio_bcnt < (ifsq->ifsq_maxbcnt / 2)) {
2864 struct mbuf *m_drop;
2867 * Perform drop-head on normal queue
2869 m_drop = ifsq_norm_dequeue(ifsq);
2870 if (m_drop != NULL) {
2872 ifsq_prio_enqueue(ifsq, m);
2875 /* XXX nothing could be dropped? */
2880 if (m->m_flags & M_PRIO)
2881 ifsq_prio_enqueue(ifsq, m);
2883 ifsq_norm_enqueue(ifsq, m);
2889 ifsq_classic_dequeue(struct ifaltq_subque *ifsq, int op)
2895 m = ifsq->ifsq_prio_head;
2897 m = ifsq->ifsq_norm_head;
2901 m = ifsq_prio_dequeue(ifsq);
2903 m = ifsq_norm_dequeue(ifsq);
2907 panic("unsupported ALTQ dequeue op: %d", op);
2913 ifsq_classic_request(struct ifaltq_subque *ifsq, int req, void *arg)
2920 m = ifsq_classic_dequeue(ifsq, ALTDQ_REMOVE);
2928 panic("unsupported ALTQ request: %d", req);
2934 ifsq_ifstart_try(struct ifaltq_subque *ifsq, int force_sched)
2936 struct ifnet *ifp = ifsq_get_ifp(ifsq);
2937 int running = 0, need_sched;
2940 * Try to do direct ifnet.if_start on the subqueue first, if there is
2941 * contention on the subqueue hardware serializer, ifnet.if_start on
2942 * the subqueue will be scheduled on the subqueue owner CPU.
2944 if (!ifsq_tryserialize_hw(ifsq)) {
2946 * Subqueue hardware serializer contention happened,
2947 * ifnet.if_start on the subqueue is scheduled on
2948 * the subqueue owner CPU, and we keep going.
2950 ifsq_ifstart_schedule(ifsq, 1);
2954 if ((ifp->if_flags & IFF_RUNNING) && !ifsq_is_oactive(ifsq)) {
2955 ifp->if_start(ifp, ifsq);
2956 if ((ifp->if_flags & IFF_RUNNING) && !ifsq_is_oactive(ifsq))
2959 need_sched = ifsq_ifstart_need_schedule(ifsq, running);
2961 ifsq_deserialize_hw(ifsq);
2965 * More data need to be transmitted, ifnet.if_start on the
2966 * subqueue is scheduled on the subqueue owner CPU, and we
2968 * NOTE: ifnet.if_start subqueue interlock is not released.
2970 ifsq_ifstart_schedule(ifsq, force_sched);
2975 * Subqeue packets staging mechanism:
2977 * The packets enqueued into the subqueue are staged to a certain amount
2978 * before the ifnet.if_start on the subqueue is called. In this way, the
2979 * driver could avoid writing to hardware registers upon every packet,
2980 * instead, hardware registers could be written when certain amount of
2981 * packets are put onto hardware TX ring. The measurement on several modern
2982 * NICs (emx(4), igb(4), bnx(4), bge(4), jme(4)) shows that the hardware
2983 * registers writing aggregation could save ~20% CPU time when 18bytes UDP
2984 * datagrams are transmitted at 1.48Mpps. The performance improvement by
2985 * hardware registers writing aggeregation is also mentioned by Luigi Rizzo's
2986 * netmap paper (http://info.iet.unipi.it/~luigi/netmap/).
2988 * Subqueue packets staging is performed for two entry points into drivers'
2989 * transmission function:
2990 * - Direct ifnet.if_start calling on the subqueue, i.e. ifsq_ifstart_try()
2991 * - ifnet.if_start scheduling on the subqueue, i.e. ifsq_ifstart_schedule()
2993 * Subqueue packets staging will be stopped upon any of the following
2995 * - If the count of packets enqueued on the current CPU is great than or
2996 * equal to ifsq_stage_cntmax. (XXX this should be per-interface)
2997 * - If the total length of packets enqueued on the current CPU is great
2998 * than or equal to the hardware's MTU - max_protohdr. max_protohdr is
2999 * cut from the hardware's MTU mainly bacause a full TCP segment's size
3000 * is usually less than hardware's MTU.
3001 * - ifsq_ifstart_schedule() is not pending on the current CPU and
3002 * ifnet.if_start subqueue interlock (ifaltq_subq.ifsq_started) is not
3004 * - The if_start_rollup(), which is registered as low priority netisr
3005 * rollup function, is called; probably because no more work is pending
3009 * Currently subqueue packet staging is only performed in netisr threads.
3012 ifq_dispatch(struct ifnet *ifp, struct mbuf *m, struct altq_pktattr *pa)
3014 struct ifaltq *ifq = &ifp->if_snd;
3015 struct ifaltq_subque *ifsq;
3016 int error, start = 0, len, mcast = 0, avoid_start = 0;
3017 struct ifsubq_stage_head *head = NULL;
3018 struct ifsubq_stage *stage = NULL;
3019 struct globaldata *gd = mycpu;
3020 struct thread *td = gd->gd_curthread;
3022 crit_enter_quick(td);
3024 ifsq = ifq_map_subq(ifq, gd->gd_cpuid);
3025 ASSERT_ALTQ_SQ_NOT_SERIALIZED_HW(ifsq);
3027 len = m->m_pkthdr.len;
3028 if (m->m_flags & M_MCAST)
3031 if (td->td_type == TD_TYPE_NETISR) {
3032 head = &ifsubq_stage_heads[mycpuid];
3033 stage = ifsq_get_stage(ifsq, mycpuid);
3036 stage->stg_len += len;
3037 if (stage->stg_cnt < ifsq_stage_cntmax &&
3038 stage->stg_len < (ifp->if_mtu - max_protohdr))
3043 error = ifsq_enqueue_locked(ifsq, m, pa);
3045 if (!ifsq_data_ready(ifsq)) {
3046 ALTQ_SQ_UNLOCK(ifsq);
3047 crit_exit_quick(td);
3052 if (!ifsq_is_started(ifsq)) {
3054 ALTQ_SQ_UNLOCK(ifsq);
3057 if ((stage->stg_flags & IFSQ_STAGE_FLAG_QUED) == 0)
3058 ifsq_stage_insert(head, stage);
3060 IFNET_STAT_INC(ifp, obytes, len);
3062 IFNET_STAT_INC(ifp, omcasts, 1);
3063 crit_exit_quick(td);
3068 * Hold the subqueue interlock of ifnet.if_start
3070 ifsq_set_started(ifsq);
3073 ALTQ_SQ_UNLOCK(ifsq);
3076 IFNET_STAT_INC(ifp, obytes, len);
3078 IFNET_STAT_INC(ifp, omcasts, 1);
3081 if (stage != NULL) {
3082 if (!start && (stage->stg_flags & IFSQ_STAGE_FLAG_SCHED)) {
3083 KKASSERT(stage->stg_flags & IFSQ_STAGE_FLAG_QUED);
3085 ifsq_stage_remove(head, stage);
3086 ifsq_ifstart_schedule(ifsq, 1);
3088 crit_exit_quick(td);
3092 if (stage->stg_flags & IFSQ_STAGE_FLAG_QUED) {
3093 ifsq_stage_remove(head, stage);
3101 crit_exit_quick(td);
3105 ifsq_ifstart_try(ifsq, 0);
3107 crit_exit_quick(td);
3112 ifa_create(int size, int flags)
3117 KASSERT(size >= sizeof(*ifa), ("ifaddr size too small"));
3119 ifa = kmalloc(size, M_IFADDR, flags | M_ZERO);
3123 ifa->ifa_containers =
3124 kmalloc_cachealign(ncpus * sizeof(struct ifaddr_container),
3125 M_IFADDR, M_WAITOK | M_ZERO);
3126 ifa->ifa_ncnt = ncpus;
3127 for (i = 0; i < ncpus; ++i) {
3128 struct ifaddr_container *ifac = &ifa->ifa_containers[i];
3130 ifac->ifa_magic = IFA_CONTAINER_MAGIC;
3132 ifac->ifa_refcnt = 1;
3135 kprintf("alloc ifa %p %d\n", ifa, size);
3141 ifac_free(struct ifaddr_container *ifac, int cpu_id)
3143 struct ifaddr *ifa = ifac->ifa;
3145 KKASSERT(ifac->ifa_magic == IFA_CONTAINER_MAGIC);
3146 KKASSERT(ifac->ifa_refcnt == 0);
3147 KASSERT(ifac->ifa_listmask == 0,
3148 ("ifa is still on %#x lists", ifac->ifa_listmask));
3150 ifac->ifa_magic = IFA_CONTAINER_DEAD;
3152 #ifdef IFADDR_DEBUG_VERBOSE
3153 kprintf("try free ifa %p cpu_id %d\n", ifac->ifa, cpu_id);
3156 KASSERT(ifa->ifa_ncnt > 0 && ifa->ifa_ncnt <= ncpus,
3157 ("invalid # of ifac, %d", ifa->ifa_ncnt));
3158 if (atomic_fetchadd_int(&ifa->ifa_ncnt, -1) == 1) {
3160 kprintf("free ifa %p\n", ifa);
3162 kfree(ifa->ifa_containers, M_IFADDR);
3163 kfree(ifa, M_IFADDR);
3168 ifa_iflink_dispatch(netmsg_t nmsg)
3170 struct netmsg_ifaddr *msg = (struct netmsg_ifaddr *)nmsg;
3171 struct ifaddr *ifa = msg->ifa;
3172 struct ifnet *ifp = msg->ifp;
3174 struct ifaddr_container *ifac;
3178 ifac = &ifa->ifa_containers[cpu];
3179 ASSERT_IFAC_VALID(ifac);
3180 KASSERT((ifac->ifa_listmask & IFA_LIST_IFADDRHEAD) == 0,
3181 ("ifaddr is on if_addrheads"));
3183 ifac->ifa_listmask |= IFA_LIST_IFADDRHEAD;
3185 TAILQ_INSERT_TAIL(&ifp->if_addrheads[cpu], ifac, ifa_link);
3187 TAILQ_INSERT_HEAD(&ifp->if_addrheads[cpu], ifac, ifa_link);
3191 ifa_forwardmsg(&nmsg->lmsg, cpu + 1);
3195 ifa_iflink(struct ifaddr *ifa, struct ifnet *ifp, int tail)
3197 struct netmsg_ifaddr msg;
3199 netmsg_init(&msg.base, NULL, &curthread->td_msgport,
3200 0, ifa_iflink_dispatch);
3205 ifa_domsg(&msg.base.lmsg, 0);
3209 ifa_ifunlink_dispatch(netmsg_t nmsg)
3211 struct netmsg_ifaddr *msg = (struct netmsg_ifaddr *)nmsg;
3212 struct ifaddr *ifa = msg->ifa;
3213 struct ifnet *ifp = msg->ifp;
3215 struct ifaddr_container *ifac;
3219 ifac = &ifa->ifa_containers[cpu];
3220 ASSERT_IFAC_VALID(ifac);
3221 KASSERT(ifac->ifa_listmask & IFA_LIST_IFADDRHEAD,
3222 ("ifaddr is not on if_addrhead"));
3224 TAILQ_REMOVE(&ifp->if_addrheads[cpu], ifac, ifa_link);
3225 ifac->ifa_listmask &= ~IFA_LIST_IFADDRHEAD;
3229 ifa_forwardmsg(&nmsg->lmsg, cpu + 1);
3233 ifa_ifunlink(struct ifaddr *ifa, struct ifnet *ifp)
3235 struct netmsg_ifaddr msg;
3237 netmsg_init(&msg.base, NULL, &curthread->td_msgport,
3238 0, ifa_ifunlink_dispatch);
3242 ifa_domsg(&msg.base.lmsg, 0);
3246 ifa_destroy_dispatch(netmsg_t nmsg)
3248 struct netmsg_ifaddr *msg = (struct netmsg_ifaddr *)nmsg;
3251 ifa_forwardmsg(&nmsg->lmsg, mycpuid + 1);
3255 ifa_destroy(struct ifaddr *ifa)
3257 struct netmsg_ifaddr msg;
3259 netmsg_init(&msg.base, NULL, &curthread->td_msgport,
3260 0, ifa_destroy_dispatch);
3263 ifa_domsg(&msg.base.lmsg, 0);
3267 ifnet_portfn(int cpu)
3269 return &ifnet_threads[cpu].td_msgport;
3273 ifnet_forwardmsg(struct lwkt_msg *lmsg, int next_cpu)
3275 KKASSERT(next_cpu > mycpuid && next_cpu <= ncpus);
3277 if (next_cpu < ncpus)
3278 lwkt_forwardmsg(ifnet_portfn(next_cpu), lmsg);
3280 lwkt_replymsg(lmsg, 0);
3284 ifnet_domsg(struct lwkt_msg *lmsg, int cpu)
3286 KKASSERT(cpu < ncpus);
3287 return lwkt_domsg(ifnet_portfn(cpu), lmsg, 0);
3291 ifnet_sendmsg(struct lwkt_msg *lmsg, int cpu)
3293 KKASSERT(cpu < ncpus);
3294 lwkt_sendmsg(ifnet_portfn(cpu), lmsg);
3298 * Generic netmsg service loop. Some protocols may roll their own but all
3299 * must do the basic command dispatch function call done here.
3302 ifnet_service_loop(void *arg __unused)
3306 while ((msg = lwkt_waitport(&curthread->td_msgport, 0))) {
3307 KASSERT(msg->base.nm_dispatch, ("ifnet_service: badmsg"));
3308 msg->base.nm_dispatch(msg);
3313 if_start_rollup(void)
3315 struct ifsubq_stage_head *head = &ifsubq_stage_heads[mycpuid];
3316 struct ifsubq_stage *stage;
3320 while ((stage = TAILQ_FIRST(&head->stg_head)) != NULL) {
3321 struct ifaltq_subque *ifsq = stage->stg_subq;
3324 if (stage->stg_flags & IFSQ_STAGE_FLAG_SCHED)
3326 ifsq_stage_remove(head, stage);
3329 ifsq_ifstart_schedule(ifsq, 1);
3334 if (!ifsq_is_started(ifsq)) {
3336 * Hold the subqueue interlock of
3339 ifsq_set_started(ifsq);
3342 ALTQ_SQ_UNLOCK(ifsq);
3345 ifsq_ifstart_try(ifsq, 1);
3347 KKASSERT((stage->stg_flags &
3348 (IFSQ_STAGE_FLAG_QUED | IFSQ_STAGE_FLAG_SCHED)) == 0);
3355 ifnetinit(void *dummy __unused)
3359 for (i = 0; i < ncpus; ++i) {
3360 struct thread *thr = &ifnet_threads[i];
3362 lwkt_create(ifnet_service_loop, NULL, NULL,
3363 thr, TDF_NOSTART|TDF_FORCE_SPINPORT|TDF_FIXEDCPU,
3365 netmsg_service_port_init(&thr->td_msgport);
3369 for (i = 0; i < ncpus; ++i)
3370 TAILQ_INIT(&ifsubq_stage_heads[i].stg_head);
3371 netisr_register_rollup(if_start_rollup, NETISR_ROLLUP_PRIO_IFSTART);
3375 if_register_com_alloc(u_char type,
3376 if_com_alloc_t *a, if_com_free_t *f)
3379 KASSERT(if_com_alloc[type] == NULL,
3380 ("if_register_com_alloc: %d already registered", type));
3381 KASSERT(if_com_free[type] == NULL,
3382 ("if_register_com_alloc: %d free already registered", type));
3384 if_com_alloc[type] = a;
3385 if_com_free[type] = f;
3389 if_deregister_com_alloc(u_char type)
3392 KASSERT(if_com_alloc[type] != NULL,
3393 ("if_deregister_com_alloc: %d not registered", type));
3394 KASSERT(if_com_free[type] != NULL,
3395 ("if_deregister_com_alloc: %d free not registered", type));
3396 if_com_alloc[type] = NULL;
3397 if_com_free[type] = NULL;
3401 if_ring_count2(int cnt, int cnt_max)
3405 KASSERT(cnt_max >= 1 && powerof2(cnt_max),
3406 ("invalid ring count max %d", cnt_max));
3415 while ((1 << (shift + 1)) <= cnt)
3419 KASSERT(cnt >= 1 && cnt <= ncpus2 && cnt <= cnt_max,
3420 ("calculate cnt %d, ncpus2 %d, cnt max %d",
3421 cnt, ncpus2, cnt_max));
3426 ifq_set_maxlen(struct ifaltq *ifq, int len)
3428 ifq->altq_maxlen = len + (ncpus * ifsq_stage_cntmax);
3432 ifq_mapsubq_default(struct ifaltq *ifq __unused, int cpuid __unused)
3434 return ALTQ_SUBQ_INDEX_DEFAULT;
3438 ifq_mapsubq_mask(struct ifaltq *ifq, int cpuid)
3440 return (cpuid & ifq->altq_subq_mask);
3444 ifsq_watchdog(void *arg)
3446 struct ifsubq_watchdog *wd = arg;
3449 if (__predict_true(wd->wd_timer == 0 || --wd->wd_timer))
3452 ifp = ifsq_get_ifp(wd->wd_subq);
3453 if (ifnet_tryserialize_all(ifp)) {
3454 wd->wd_watchdog(wd->wd_subq);
3455 ifnet_deserialize_all(ifp);
3457 /* try again next timeout */
3461 ifsq_watchdog_reset(wd);
3465 ifsq_watchdog_reset(struct ifsubq_watchdog *wd)
3467 callout_reset_bycpu(&wd->wd_callout, hz, ifsq_watchdog, wd,
3468 ifsq_get_cpuid(wd->wd_subq));
3472 ifsq_watchdog_init(struct ifsubq_watchdog *wd, struct ifaltq_subque *ifsq,
3473 ifsq_watchdog_t watchdog)
3475 callout_init_mp(&wd->wd_callout);
3478 wd->wd_watchdog = watchdog;
3482 ifsq_watchdog_start(struct ifsubq_watchdog *wd)
3485 ifsq_watchdog_reset(wd);
3489 ifsq_watchdog_stop(struct ifsubq_watchdog *wd)
3492 callout_stop(&wd->wd_callout);
3498 KASSERT(curthread->td_type != TD_TYPE_NETISR,
3499 ("try holding ifnet lock in netisr"));
3500 mtx_lock(&ifnet_mtx);
3506 KASSERT(curthread->td_type != TD_TYPE_NETISR,
3507 ("try holding ifnet lock in netisr"));
3508 mtx_unlock(&ifnet_mtx);
3511 static struct ifnet_array *
3512 ifnet_array_alloc(int count)
3514 struct ifnet_array *arr;
3516 arr = kmalloc(__offsetof(struct ifnet_array, ifnet_arr[count]),
3518 arr->ifnet_count = count;
3524 ifnet_array_free(struct ifnet_array *arr)
3526 if (arr == &ifnet_array0)
3528 kfree(arr, M_IFNET);
3531 static struct ifnet_array *
3532 ifnet_array_add(struct ifnet *ifp, const struct ifnet_array *old_arr)
3534 struct ifnet_array *arr;
3537 KASSERT(old_arr->ifnet_count >= 0,
3538 ("invalid ifnet array count %d", old_arr->ifnet_count));
3539 count = old_arr->ifnet_count + 1;
3540 arr = ifnet_array_alloc(count);
3543 * Save the old ifnet array and append this ifp to the end of
3544 * the new ifnet array.
3546 for (i = 0; i < old_arr->ifnet_count; ++i) {
3547 KASSERT(old_arr->ifnet_arr[i] != ifp,
3548 ("%s is already in ifnet array", ifp->if_xname));
3549 arr->ifnet_arr[i] = old_arr->ifnet_arr[i];
3551 KASSERT(i == count - 1,
3552 ("add %s, ifnet array index mismatch, should be %d, but got %d",
3553 ifp->if_xname, count - 1, i));
3554 arr->ifnet_arr[i] = ifp;
3559 static struct ifnet_array *
3560 ifnet_array_del(struct ifnet *ifp, const struct ifnet_array *old_arr)
3562 struct ifnet_array *arr;
3563 int count, i, idx, found = 0;
3565 KASSERT(old_arr->ifnet_count > 0,
3566 ("invalid ifnet array count %d", old_arr->ifnet_count));
3567 count = old_arr->ifnet_count - 1;
3568 arr = ifnet_array_alloc(count);
3571 * Save the old ifnet array, but skip this ifp.
3574 for (i = 0; i < old_arr->ifnet_count; ++i) {
3575 if (old_arr->ifnet_arr[i] == ifp) {
3577 ("dup %s is in ifnet array", ifp->if_xname));
3581 KASSERT(idx < count,
3582 ("invalid ifnet array index %d, count %d", idx, count));
3583 arr->ifnet_arr[idx] = old_arr->ifnet_arr[i];
3586 KASSERT(found, ("%s is not in ifnet array", ifp->if_xname));
3587 KASSERT(idx == count,
3588 ("del %s, ifnet array count mismatch, should be %d, but got %d ",
3589 ifp->if_xname, count, idx));
3594 const struct ifnet_array *
3595 ifnet_array_get(void)
3597 KASSERT(curthread->td_type == TD_TYPE_NETISR, ("not in netisr"));
3602 ifnet_array_isempty(void)
3604 KASSERT(curthread->td_type == TD_TYPE_NETISR, ("not in netisr"));
3605 if (ifnet_array->ifnet_count == 0)
3612 ifa_marker_init(struct ifaddr_marker *mark, struct ifnet *ifp)
3616 memset(mark, 0, sizeof(*mark));
3619 mark->ifac.ifa = ifa;
3621 ifa->ifa_addr = &mark->addr;
3622 ifa->ifa_dstaddr = &mark->dstaddr;
3623 ifa->ifa_netmask = &mark->netmask;