FreeBSD/Linux Kernel Cross Reference
sys/net/if.c
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 * 4. 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 8.5 (Berkeley) 1/9/95
30 * $FreeBSD: releng/11.0/sys/net/if.c 303658 2016-08-02 13:57:20Z glebius $
31 */
32
33 #include "opt_compat.h"
34 #include "opt_inet6.h"
35 #include "opt_inet.h"
36
37 #include <sys/param.h>
38 #include <sys/types.h>
39 #include <sys/conf.h>
40 #include <sys/malloc.h>
41 #include <sys/sbuf.h>
42 #include <sys/bus.h>
43 #include <sys/mbuf.h>
44 #include <sys/systm.h>
45 #include <sys/priv.h>
46 #include <sys/proc.h>
47 #include <sys/socket.h>
48 #include <sys/socketvar.h>
49 #include <sys/protosw.h>
50 #include <sys/kernel.h>
51 #include <sys/lock.h>
52 #include <sys/refcount.h>
53 #include <sys/module.h>
54 #include <sys/rwlock.h>
55 #include <sys/sockio.h>
56 #include <sys/syslog.h>
57 #include <sys/sysctl.h>
58 #include <sys/taskqueue.h>
59 #include <sys/domain.h>
60 #include <sys/jail.h>
61 #include <sys/priv.h>
62
63 #include <machine/stdarg.h>
64 #include <vm/uma.h>
65
66 #include <net/bpf.h>
67 #include <net/ethernet.h>
68 #include <net/if.h>
69 #include <net/if_arp.h>
70 #include <net/if_clone.h>
71 #include <net/if_dl.h>
72 #include <net/if_types.h>
73 #include <net/if_var.h>
74 #include <net/if_media.h>
75 #include <net/if_vlan_var.h>
76 #include <net/radix.h>
77 #include <net/route.h>
78 #include <net/vnet.h>
79
80 #if defined(INET) || defined(INET6)
81 #include <net/ethernet.h>
82 #include <netinet/in.h>
83 #include <netinet/in_var.h>
84 #include <netinet/ip.h>
85 #include <netinet/ip_carp.h>
86 #ifdef INET
87 #include <netinet/if_ether.h>
88 #endif /* INET */
89 #ifdef INET6
90 #include <netinet6/in6_var.h>
91 #include <netinet6/in6_ifattach.h>
92 #endif /* INET6 */
93 #endif /* INET || INET6 */
94
95 #include <security/mac/mac_framework.h>
96
97 #ifdef COMPAT_FREEBSD32
98 #include <sys/mount.h>
99 #include <compat/freebsd32/freebsd32.h>
100 #endif
101
102 SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers");
103 SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management");
104
105 SYSCTL_INT(_net_link, OID_AUTO, ifqmaxlen, CTLFLAG_RDTUN,
106 &ifqmaxlen, 0, "max send queue size");
107
108 /* Log link state change events */
109 static int log_link_state_change = 1;
110
111 SYSCTL_INT(_net_link, OID_AUTO, log_link_state_change, CTLFLAG_RW,
112 &log_link_state_change, 0,
113 "log interface link state change events");
114
115 /* Log promiscuous mode change events */
116 static int log_promisc_mode_change = 1;
117
118 SYSCTL_INT(_net_link, OID_AUTO, log_promisc_mode_change, CTLFLAG_RDTUN,
119 &log_promisc_mode_change, 1,
120 "log promiscuous mode change events");
121
122 /* Interface description */
123 static unsigned int ifdescr_maxlen = 1024;
124 SYSCTL_UINT(_net, OID_AUTO, ifdescr_maxlen, CTLFLAG_RW,
125 &ifdescr_maxlen, 0,
126 "administrative maximum length for interface description");
127
128 static MALLOC_DEFINE(M_IFDESCR, "ifdescr", "ifnet descriptions");
129
130 /* global sx for non-critical path ifdescr */
131 static struct sx ifdescr_sx;
132 SX_SYSINIT(ifdescr_sx, &ifdescr_sx, "ifnet descr");
133
134 void (*bridge_linkstate_p)(struct ifnet *ifp);
135 void (*ng_ether_link_state_p)(struct ifnet *ifp, int state);
136 void (*lagg_linkstate_p)(struct ifnet *ifp, int state);
137 /* These are external hooks for CARP. */
138 void (*carp_linkstate_p)(struct ifnet *ifp);
139 void (*carp_demote_adj_p)(int, char *);
140 int (*carp_master_p)(struct ifaddr *);
141 #if defined(INET) || defined(INET6)
142 int (*carp_forus_p)(struct ifnet *ifp, u_char *dhost);
143 int (*carp_output_p)(struct ifnet *ifp, struct mbuf *m,
144 const struct sockaddr *sa);
145 int (*carp_ioctl_p)(struct ifreq *, u_long, struct thread *);
146 int (*carp_attach_p)(struct ifaddr *, int);
147 void (*carp_detach_p)(struct ifaddr *);
148 #endif
149 #ifdef INET
150 int (*carp_iamatch_p)(struct ifaddr *, uint8_t **);
151 #endif
152 #ifdef INET6
153 struct ifaddr *(*carp_iamatch6_p)(struct ifnet *ifp, struct in6_addr *taddr6);
154 caddr_t (*carp_macmatch6_p)(struct ifnet *ifp, struct mbuf *m,
155 const struct in6_addr *taddr);
156 #endif
157
158 struct mbuf *(*tbr_dequeue_ptr)(struct ifaltq *, int) = NULL;
159
160 /*
161 * XXX: Style; these should be sorted alphabetically, and unprototyped
162 * static functions should be prototyped. Currently they are sorted by
163 * declaration order.
164 */
165 static void if_attachdomain(void *);
166 static void if_attachdomain1(struct ifnet *);
167 static int ifconf(u_long, caddr_t);
168 static void if_freemulti(struct ifmultiaddr *);
169 static void if_grow(void);
170 static void if_input_default(struct ifnet *, struct mbuf *);
171 static int if_requestencap_default(struct ifnet *, struct if_encap_req *);
172 static void if_route(struct ifnet *, int flag, int fam);
173 static int if_setflag(struct ifnet *, int, int, int *, int);
174 static int if_transmit(struct ifnet *ifp, struct mbuf *m);
175 static void if_unroute(struct ifnet *, int flag, int fam);
176 static void link_rtrequest(int, struct rtentry *, struct rt_addrinfo *);
177 static int ifhwioctl(u_long, struct ifnet *, caddr_t, struct thread *);
178 static int if_delmulti_locked(struct ifnet *, struct ifmultiaddr *, int);
179 static void do_link_state_change(void *, int);
180 static int if_getgroup(struct ifgroupreq *, struct ifnet *);
181 static int if_getgroupmembers(struct ifgroupreq *);
182 static void if_delgroups(struct ifnet *);
183 static void if_attach_internal(struct ifnet *, int, struct if_clone *);
184 static int if_detach_internal(struct ifnet *, int, struct if_clone **);
185 #ifdef VIMAGE
186 static void if_vmove(struct ifnet *, struct vnet *);
187 #endif
188
189 #ifdef INET6
190 /*
191 * XXX: declare here to avoid to include many inet6 related files..
192 * should be more generalized?
193 */
194 extern void nd6_setmtu(struct ifnet *);
195 #endif
196
197 /* ipsec helper hooks */
198 VNET_DEFINE(struct hhook_head *, ipsec_hhh_in[HHOOK_IPSEC_COUNT]);
199 VNET_DEFINE(struct hhook_head *, ipsec_hhh_out[HHOOK_IPSEC_COUNT]);
200
201 VNET_DEFINE(int, if_index);
202 int ifqmaxlen = IFQ_MAXLEN;
203 VNET_DEFINE(struct ifnethead, ifnet); /* depend on static init XXX */
204 VNET_DEFINE(struct ifgrouphead, ifg_head);
205
206 static VNET_DEFINE(int, if_indexlim) = 8;
207
208 /* Table of ifnet by index. */
209 VNET_DEFINE(struct ifnet **, ifindex_table);
210
211 #define V_if_indexlim VNET(if_indexlim)
212 #define V_ifindex_table VNET(ifindex_table)
213
214 /*
215 * The global network interface list (V_ifnet) and related state (such as
216 * if_index, if_indexlim, and ifindex_table) are protected by an sxlock and
217 * an rwlock. Either may be acquired shared to stablize the list, but both
218 * must be acquired writable to modify the list. This model allows us to
219 * both stablize the interface list during interrupt thread processing, but
220 * also to stablize it over long-running ioctls, without introducing priority
221 * inversions and deadlocks.
222 */
223 struct rwlock ifnet_rwlock;
224 RW_SYSINIT_FLAGS(ifnet_rw, &ifnet_rwlock, "ifnet_rw", RW_RECURSE);
225 struct sx ifnet_sxlock;
226 SX_SYSINIT_FLAGS(ifnet_sx, &ifnet_sxlock, "ifnet_sx", SX_RECURSE);
227
228 /*
229 * The allocation of network interfaces is a rather non-atomic affair; we
230 * need to select an index before we are ready to expose the interface for
231 * use, so will use this pointer value to indicate reservation.
232 */
233 #define IFNET_HOLD (void *)(uintptr_t)(-1)
234
235 static if_com_alloc_t *if_com_alloc[256];
236 static if_com_free_t *if_com_free[256];
237
238 static MALLOC_DEFINE(M_IFNET, "ifnet", "interface internals");
239 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address");
240 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address");
241
242 struct ifnet *
243 ifnet_byindex_locked(u_short idx)
244 {
245
246 if (idx > V_if_index)
247 return (NULL);
248 if (V_ifindex_table[idx] == IFNET_HOLD)
249 return (NULL);
250 return (V_ifindex_table[idx]);
251 }
252
253 struct ifnet *
254 ifnet_byindex(u_short idx)
255 {
256 struct ifnet *ifp;
257
258 IFNET_RLOCK_NOSLEEP();
259 ifp = ifnet_byindex_locked(idx);
260 IFNET_RUNLOCK_NOSLEEP();
261 return (ifp);
262 }
263
264 struct ifnet *
265 ifnet_byindex_ref(u_short idx)
266 {
267 struct ifnet *ifp;
268
269 IFNET_RLOCK_NOSLEEP();
270 ifp = ifnet_byindex_locked(idx);
271 if (ifp == NULL || (ifp->if_flags & IFF_DYING)) {
272 IFNET_RUNLOCK_NOSLEEP();
273 return (NULL);
274 }
275 if_ref(ifp);
276 IFNET_RUNLOCK_NOSLEEP();
277 return (ifp);
278 }
279
280 /*
281 * Allocate an ifindex array entry; return 0 on success or an error on
282 * failure.
283 */
284 static u_short
285 ifindex_alloc(void)
286 {
287 u_short idx;
288
289 IFNET_WLOCK_ASSERT();
290 retry:
291 /*
292 * Try to find an empty slot below V_if_index. If we fail, take the
293 * next slot.
294 */
295 for (idx = 1; idx <= V_if_index; idx++) {
296 if (V_ifindex_table[idx] == NULL)
297 break;
298 }
299
300 /* Catch if_index overflow. */
301 if (idx >= V_if_indexlim) {
302 if_grow();
303 goto retry;
304 }
305 if (idx > V_if_index)
306 V_if_index = idx;
307 return (idx);
308 }
309
310 static void
311 ifindex_free_locked(u_short idx)
312 {
313
314 IFNET_WLOCK_ASSERT();
315
316 V_ifindex_table[idx] = NULL;
317 while (V_if_index > 0 &&
318 V_ifindex_table[V_if_index] == NULL)
319 V_if_index--;
320 }
321
322 static void
323 ifindex_free(u_short idx)
324 {
325
326 IFNET_WLOCK();
327 ifindex_free_locked(idx);
328 IFNET_WUNLOCK();
329 }
330
331 static void
332 ifnet_setbyindex_locked(u_short idx, struct ifnet *ifp)
333 {
334
335 IFNET_WLOCK_ASSERT();
336
337 V_ifindex_table[idx] = ifp;
338 }
339
340 static void
341 ifnet_setbyindex(u_short idx, struct ifnet *ifp)
342 {
343
344 IFNET_WLOCK();
345 ifnet_setbyindex_locked(idx, ifp);
346 IFNET_WUNLOCK();
347 }
348
349 struct ifaddr *
350 ifaddr_byindex(u_short idx)
351 {
352 struct ifnet *ifp;
353 struct ifaddr *ifa = NULL;
354
355 IFNET_RLOCK_NOSLEEP();
356 ifp = ifnet_byindex_locked(idx);
357 if (ifp != NULL && (ifa = ifp->if_addr) != NULL)
358 ifa_ref(ifa);
359 IFNET_RUNLOCK_NOSLEEP();
360 return (ifa);
361 }
362
363 /*
364 * Network interface utility routines.
365 *
366 * Routines with ifa_ifwith* names take sockaddr *'s as
367 * parameters.
368 */
369
370 static void
371 vnet_if_init(const void *unused __unused)
372 {
373
374 TAILQ_INIT(&V_ifnet);
375 TAILQ_INIT(&V_ifg_head);
376 IFNET_WLOCK();
377 if_grow(); /* create initial table */
378 IFNET_WUNLOCK();
379 vnet_if_clone_init();
380 }
381 VNET_SYSINIT(vnet_if_init, SI_SUB_INIT_IF, SI_ORDER_SECOND, vnet_if_init,
382 NULL);
383
384 #ifdef VIMAGE
385 static void
386 vnet_if_uninit(const void *unused __unused)
387 {
388
389 VNET_ASSERT(TAILQ_EMPTY(&V_ifnet), ("%s:%d tailq &V_ifnet=%p "
390 "not empty", __func__, __LINE__, &V_ifnet));
391 VNET_ASSERT(TAILQ_EMPTY(&V_ifg_head), ("%s:%d tailq &V_ifg_head=%p "
392 "not empty", __func__, __LINE__, &V_ifg_head));
393
394 free((caddr_t)V_ifindex_table, M_IFNET);
395 }
396 VNET_SYSUNINIT(vnet_if_uninit, SI_SUB_INIT_IF, SI_ORDER_FIRST,
397 vnet_if_uninit, NULL);
398
399 static void
400 vnet_if_return(const void *unused __unused)
401 {
402 struct ifnet *ifp, *nifp;
403
404 /* Return all inherited interfaces to their parent vnets. */
405 TAILQ_FOREACH_SAFE(ifp, &V_ifnet, if_link, nifp) {
406 if (ifp->if_home_vnet != ifp->if_vnet)
407 if_vmove(ifp, ifp->if_home_vnet);
408 }
409 }
410 VNET_SYSUNINIT(vnet_if_return, SI_SUB_VNET_DONE, SI_ORDER_ANY,
411 vnet_if_return, NULL);
412 #endif
413
414 static void
415 if_grow(void)
416 {
417 int oldlim;
418 u_int n;
419 struct ifnet **e;
420
421 IFNET_WLOCK_ASSERT();
422 oldlim = V_if_indexlim;
423 IFNET_WUNLOCK();
424 n = (oldlim << 1) * sizeof(*e);
425 e = malloc(n, M_IFNET, M_WAITOK | M_ZERO);
426 IFNET_WLOCK();
427 if (V_if_indexlim != oldlim) {
428 free(e, M_IFNET);
429 return;
430 }
431 if (V_ifindex_table != NULL) {
432 memcpy((caddr_t)e, (caddr_t)V_ifindex_table, n/2);
433 free((caddr_t)V_ifindex_table, M_IFNET);
434 }
435 V_if_indexlim <<= 1;
436 V_ifindex_table = e;
437 }
438
439 /*
440 * Allocate a struct ifnet and an index for an interface. A layer 2
441 * common structure will also be allocated if an allocation routine is
442 * registered for the passed type.
443 */
444 struct ifnet *
445 if_alloc(u_char type)
446 {
447 struct ifnet *ifp;
448 u_short idx;
449
450 ifp = malloc(sizeof(struct ifnet), M_IFNET, M_WAITOK|M_ZERO);
451 IFNET_WLOCK();
452 idx = ifindex_alloc();
453 ifnet_setbyindex_locked(idx, IFNET_HOLD);
454 IFNET_WUNLOCK();
455 ifp->if_index = idx;
456 ifp->if_type = type;
457 ifp->if_alloctype = type;
458 #ifdef VIMAGE
459 ifp->if_vnet = curvnet;
460 #endif
461 if (if_com_alloc[type] != NULL) {
462 ifp->if_l2com = if_com_alloc[type](type, ifp);
463 if (ifp->if_l2com == NULL) {
464 free(ifp, M_IFNET);
465 ifindex_free(idx);
466 return (NULL);
467 }
468 }
469
470 IF_ADDR_LOCK_INIT(ifp);
471 TASK_INIT(&ifp->if_linktask, 0, do_link_state_change, ifp);
472 ifp->if_afdata_initialized = 0;
473 IF_AFDATA_LOCK_INIT(ifp);
474 TAILQ_INIT(&ifp->if_addrhead);
475 TAILQ_INIT(&ifp->if_multiaddrs);
476 TAILQ_INIT(&ifp->if_groups);
477 #ifdef MAC
478 mac_ifnet_init(ifp);
479 #endif
480 ifq_init(&ifp->if_snd, ifp);
481
482 refcount_init(&ifp->if_refcount, 1); /* Index reference. */
483 for (int i = 0; i < IFCOUNTERS; i++)
484 ifp->if_counters[i] = counter_u64_alloc(M_WAITOK);
485 ifp->if_get_counter = if_get_counter_default;
486 ifnet_setbyindex(ifp->if_index, ifp);
487 return (ifp);
488 }
489
490 /*
491 * Do the actual work of freeing a struct ifnet, and layer 2 common
492 * structure. This call is made when the last reference to an
493 * interface is released.
494 */
495 static void
496 if_free_internal(struct ifnet *ifp)
497 {
498
499 KASSERT((ifp->if_flags & IFF_DYING),
500 ("if_free_internal: interface not dying"));
501
502 if (if_com_free[ifp->if_alloctype] != NULL)
503 if_com_free[ifp->if_alloctype](ifp->if_l2com,
504 ifp->if_alloctype);
505
506 #ifdef MAC
507 mac_ifnet_destroy(ifp);
508 #endif /* MAC */
509 if (ifp->if_description != NULL)
510 free(ifp->if_description, M_IFDESCR);
511 IF_AFDATA_DESTROY(ifp);
512 IF_ADDR_LOCK_DESTROY(ifp);
513 ifq_delete(&ifp->if_snd);
514
515 for (int i = 0; i < IFCOUNTERS; i++)
516 counter_u64_free(ifp->if_counters[i]);
517
518 free(ifp, M_IFNET);
519 }
520
521 /*
522 * Deregister an interface and free the associated storage.
523 */
524 void
525 if_free(struct ifnet *ifp)
526 {
527
528 ifp->if_flags |= IFF_DYING; /* XXX: Locking */
529
530 CURVNET_SET_QUIET(ifp->if_vnet);
531 IFNET_WLOCK();
532 KASSERT(ifp == ifnet_byindex_locked(ifp->if_index),
533 ("%s: freeing unallocated ifnet", ifp->if_xname));
534
535 ifindex_free_locked(ifp->if_index);
536 IFNET_WUNLOCK();
537
538 if (refcount_release(&ifp->if_refcount))
539 if_free_internal(ifp);
540 CURVNET_RESTORE();
541 }
542
543 /*
544 * Interfaces to keep an ifnet type-stable despite the possibility of the
545 * driver calling if_free(). If there are additional references, we defer
546 * freeing the underlying data structure.
547 */
548 void
549 if_ref(struct ifnet *ifp)
550 {
551
552 /* We don't assert the ifnet list lock here, but arguably should. */
553 refcount_acquire(&ifp->if_refcount);
554 }
555
556 void
557 if_rele(struct ifnet *ifp)
558 {
559
560 if (!refcount_release(&ifp->if_refcount))
561 return;
562 if_free_internal(ifp);
563 }
564
565 void
566 ifq_init(struct ifaltq *ifq, struct ifnet *ifp)
567 {
568
569 mtx_init(&ifq->ifq_mtx, ifp->if_xname, "if send queue", MTX_DEF);
570
571 if (ifq->ifq_maxlen == 0)
572 ifq->ifq_maxlen = ifqmaxlen;
573
574 ifq->altq_type = 0;
575 ifq->altq_disc = NULL;
576 ifq->altq_flags &= ALTQF_CANTCHANGE;
577 ifq->altq_tbr = NULL;
578 ifq->altq_ifp = ifp;
579 }
580
581 void
582 ifq_delete(struct ifaltq *ifq)
583 {
584 mtx_destroy(&ifq->ifq_mtx);
585 }
586
587 /*
588 * Perform generic interface initialization tasks and attach the interface
589 * to the list of "active" interfaces. If vmove flag is set on entry
590 * to if_attach_internal(), perform only a limited subset of initialization
591 * tasks, given that we are moving from one vnet to another an ifnet which
592 * has already been fully initialized.
593 *
594 * Note that if_detach_internal() removes group membership unconditionally
595 * even when vmove flag is set, and if_attach_internal() adds only IFG_ALL.
596 * Thus, when if_vmove() is applied to a cloned interface, group membership
597 * is lost while a cloned one always joins a group whose name is
598 * ifc->ifc_name. To recover this after if_detach_internal() and
599 * if_attach_internal(), the cloner should be specified to
600 * if_attach_internal() via ifc. If it is non-NULL, if_attach_internal()
601 * attempts to join a group whose name is ifc->ifc_name.
602 *
603 * XXX:
604 * - The decision to return void and thus require this function to
605 * succeed is questionable.
606 * - We should probably do more sanity checking. For instance we don't
607 * do anything to insure if_xname is unique or non-empty.
608 */
609 void
610 if_attach(struct ifnet *ifp)
611 {
612
613 if_attach_internal(ifp, 0, NULL);
614 }
615
616 /*
617 * Compute the least common TSO limit.
618 */
619 void
620 if_hw_tsomax_common(if_t ifp, struct ifnet_hw_tsomax *pmax)
621 {
622 /*
623 * 1) If there is no limit currently, take the limit from
624 * the network adapter.
625 *
626 * 2) If the network adapter has a limit below the current
627 * limit, apply it.
628 */
629 if (pmax->tsomaxbytes == 0 || (ifp->if_hw_tsomax != 0 &&
630 ifp->if_hw_tsomax < pmax->tsomaxbytes)) {
631 pmax->tsomaxbytes = ifp->if_hw_tsomax;
632 }
633 if (pmax->tsomaxsegcount == 0 || (ifp->if_hw_tsomaxsegcount != 0 &&
634 ifp->if_hw_tsomaxsegcount < pmax->tsomaxsegcount)) {
635 pmax->tsomaxsegcount = ifp->if_hw_tsomaxsegcount;
636 }
637 if (pmax->tsomaxsegsize == 0 || (ifp->if_hw_tsomaxsegsize != 0 &&
638 ifp->if_hw_tsomaxsegsize < pmax->tsomaxsegsize)) {
639 pmax->tsomaxsegsize = ifp->if_hw_tsomaxsegsize;
640 }
641 }
642
643 /*
644 * Update TSO limit of a network adapter.
645 *
646 * Returns zero if no change. Else non-zero.
647 */
648 int
649 if_hw_tsomax_update(if_t ifp, struct ifnet_hw_tsomax *pmax)
650 {
651 int retval = 0;
652 if (ifp->if_hw_tsomax != pmax->tsomaxbytes) {
653 ifp->if_hw_tsomax = pmax->tsomaxbytes;
654 retval++;
655 }
656 if (ifp->if_hw_tsomaxsegsize != pmax->tsomaxsegsize) {
657 ifp->if_hw_tsomaxsegsize = pmax->tsomaxsegsize;
658 retval++;
659 }
660 if (ifp->if_hw_tsomaxsegcount != pmax->tsomaxsegcount) {
661 ifp->if_hw_tsomaxsegcount = pmax->tsomaxsegcount;
662 retval++;
663 }
664 return (retval);
665 }
666
667 static void
668 if_attach_internal(struct ifnet *ifp, int vmove, struct if_clone *ifc)
669 {
670 unsigned socksize, ifasize;
671 int namelen, masklen;
672 struct sockaddr_dl *sdl;
673 struct ifaddr *ifa;
674
675 if (ifp->if_index == 0 || ifp != ifnet_byindex(ifp->if_index))
676 panic ("%s: BUG: if_attach called without if_alloc'd input()\n",
677 ifp->if_xname);
678
679 #ifdef VIMAGE
680 ifp->if_vnet = curvnet;
681 if (ifp->if_home_vnet == NULL)
682 ifp->if_home_vnet = curvnet;
683 #endif
684
685 if_addgroup(ifp, IFG_ALL);
686
687 /* Restore group membership for cloned interfaces. */
688 if (vmove && ifc != NULL)
689 if_clone_addgroup(ifp, ifc);
690
691 getmicrotime(&ifp->if_lastchange);
692 ifp->if_epoch = time_uptime;
693
694 KASSERT((ifp->if_transmit == NULL && ifp->if_qflush == NULL) ||
695 (ifp->if_transmit != NULL && ifp->if_qflush != NULL),
696 ("transmit and qflush must both either be set or both be NULL"));
697 if (ifp->if_transmit == NULL) {
698 ifp->if_transmit = if_transmit;
699 ifp->if_qflush = if_qflush;
700 }
701 if (ifp->if_input == NULL)
702 ifp->if_input = if_input_default;
703
704 if (ifp->if_requestencap == NULL)
705 ifp->if_requestencap = if_requestencap_default;
706
707 if (!vmove) {
708 #ifdef MAC
709 mac_ifnet_create(ifp);
710 #endif
711
712 /*
713 * Create a Link Level name for this device.
714 */
715 namelen = strlen(ifp->if_xname);
716 /*
717 * Always save enough space for any possiable name so we
718 * can do a rename in place later.
719 */
720 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + IFNAMSIZ;
721 socksize = masklen + ifp->if_addrlen;
722 if (socksize < sizeof(*sdl))
723 socksize = sizeof(*sdl);
724 socksize = roundup2(socksize, sizeof(long));
725 ifasize = sizeof(*ifa) + 2 * socksize;
726 ifa = ifa_alloc(ifasize, M_WAITOK);
727 sdl = (struct sockaddr_dl *)(ifa + 1);
728 sdl->sdl_len = socksize;
729 sdl->sdl_family = AF_LINK;
730 bcopy(ifp->if_xname, sdl->sdl_data, namelen);
731 sdl->sdl_nlen = namelen;
732 sdl->sdl_index = ifp->if_index;
733 sdl->sdl_type = ifp->if_type;
734 ifp->if_addr = ifa;
735 ifa->ifa_ifp = ifp;
736 ifa->ifa_rtrequest = link_rtrequest;
737 ifa->ifa_addr = (struct sockaddr *)sdl;
738 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
739 ifa->ifa_netmask = (struct sockaddr *)sdl;
740 sdl->sdl_len = masklen;
741 while (namelen != 0)
742 sdl->sdl_data[--namelen] = 0xff;
743 TAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link);
744 /* Reliably crash if used uninitialized. */
745 ifp->if_broadcastaddr = NULL;
746
747 #if defined(INET) || defined(INET6)
748 /* Use defaults for TSO, if nothing is set */
749 if (ifp->if_hw_tsomax == 0 &&
750 ifp->if_hw_tsomaxsegcount == 0 &&
751 ifp->if_hw_tsomaxsegsize == 0) {
752 /*
753 * The TSO defaults needs to be such that an
754 * NFS mbuf list of 35 mbufs totalling just
755 * below 64K works and that a chain of mbufs
756 * can be defragged into at most 32 segments:
757 */
758 ifp->if_hw_tsomax = min(IP_MAXPACKET, (32 * MCLBYTES) -
759 (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN));
760 ifp->if_hw_tsomaxsegcount = 35;
761 ifp->if_hw_tsomaxsegsize = 2048; /* 2K */
762
763 /* XXX some drivers set IFCAP_TSO after ethernet attach */
764 if (ifp->if_capabilities & IFCAP_TSO) {
765 if_printf(ifp, "Using defaults for TSO: %u/%u/%u\n",
766 ifp->if_hw_tsomax,
767 ifp->if_hw_tsomaxsegcount,
768 ifp->if_hw_tsomaxsegsize);
769 }
770 }
771 #endif
772 }
773 #ifdef VIMAGE
774 else {
775 /*
776 * Update the interface index in the link layer address
777 * of the interface.
778 */
779 for (ifa = ifp->if_addr; ifa != NULL;
780 ifa = TAILQ_NEXT(ifa, ifa_link)) {
781 if (ifa->ifa_addr->sa_family == AF_LINK) {
782 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
783 sdl->sdl_index = ifp->if_index;
784 }
785 }
786 }
787 #endif
788
789 IFNET_WLOCK();
790 TAILQ_INSERT_TAIL(&V_ifnet, ifp, if_link);
791 #ifdef VIMAGE
792 curvnet->vnet_ifcnt++;
793 #endif
794 IFNET_WUNLOCK();
795
796 if (domain_init_status >= 2)
797 if_attachdomain1(ifp);
798
799 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
800 if (IS_DEFAULT_VNET(curvnet))
801 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL);
802
803 /* Announce the interface. */
804 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
805 }
806
807 static void
808 if_attachdomain(void *dummy)
809 {
810 struct ifnet *ifp;
811
812 TAILQ_FOREACH(ifp, &V_ifnet, if_link)
813 if_attachdomain1(ifp);
814 }
815 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_SECOND,
816 if_attachdomain, NULL);
817
818 static void
819 if_attachdomain1(struct ifnet *ifp)
820 {
821 struct domain *dp;
822
823 /*
824 * Since dp->dom_ifattach calls malloc() with M_WAITOK, we
825 * cannot lock ifp->if_afdata initialization, entirely.
826 */
827 IF_AFDATA_LOCK(ifp);
828 if (ifp->if_afdata_initialized >= domain_init_status) {
829 IF_AFDATA_UNLOCK(ifp);
830 log(LOG_WARNING, "%s called more than once on %s\n",
831 __func__, ifp->if_xname);
832 return;
833 }
834 ifp->if_afdata_initialized = domain_init_status;
835 IF_AFDATA_UNLOCK(ifp);
836
837 /* address family dependent data region */
838 bzero(ifp->if_afdata, sizeof(ifp->if_afdata));
839 for (dp = domains; dp; dp = dp->dom_next) {
840 if (dp->dom_ifattach)
841 ifp->if_afdata[dp->dom_family] =
842 (*dp->dom_ifattach)(ifp);
843 }
844 }
845
846 /*
847 * Remove any unicast or broadcast network addresses from an interface.
848 */
849 void
850 if_purgeaddrs(struct ifnet *ifp)
851 {
852 struct ifaddr *ifa, *next;
853
854 /* XXX cannot hold IF_ADDR_WLOCK over called functions. */
855 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) {
856 if (ifa->ifa_addr->sa_family == AF_LINK)
857 continue;
858 #ifdef INET
859 /* XXX: Ugly!! ad hoc just for INET */
860 if (ifa->ifa_addr->sa_family == AF_INET) {
861 struct ifaliasreq ifr;
862
863 bzero(&ifr, sizeof(ifr));
864 ifr.ifra_addr = *ifa->ifa_addr;
865 if (ifa->ifa_dstaddr)
866 ifr.ifra_broadaddr = *ifa->ifa_dstaddr;
867 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp,
868 NULL) == 0)
869 continue;
870 }
871 #endif /* INET */
872 #ifdef INET6
873 if (ifa->ifa_addr->sa_family == AF_INET6) {
874 in6_purgeaddr(ifa);
875 /* ifp_addrhead is already updated */
876 continue;
877 }
878 #endif /* INET6 */
879 IF_ADDR_WLOCK(ifp);
880 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
881 IF_ADDR_WUNLOCK(ifp);
882 ifa_free(ifa);
883 }
884 }
885
886 /*
887 * Remove any multicast network addresses from an interface when an ifnet
888 * is going away.
889 */
890 static void
891 if_purgemaddrs(struct ifnet *ifp)
892 {
893 struct ifmultiaddr *ifma;
894 struct ifmultiaddr *next;
895
896 IF_ADDR_WLOCK(ifp);
897 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next)
898 if_delmulti_locked(ifp, ifma, 1);
899 IF_ADDR_WUNLOCK(ifp);
900 }
901
902 /*
903 * Detach an interface, removing it from the list of "active" interfaces.
904 * If vmove flag is set on entry to if_detach_internal(), perform only a
905 * limited subset of cleanup tasks, given that we are moving an ifnet from
906 * one vnet to another, where it must be fully operational.
907 *
908 * XXXRW: There are some significant questions about event ordering, and
909 * how to prevent things from starting to use the interface during detach.
910 */
911 void
912 if_detach(struct ifnet *ifp)
913 {
914
915 CURVNET_SET_QUIET(ifp->if_vnet);
916 if_detach_internal(ifp, 0, NULL);
917 CURVNET_RESTORE();
918 }
919
920 /*
921 * The vmove flag, if set, indicates that we are called from a callpath
922 * that is moving an interface to a different vnet instance.
923 *
924 * The shutdown flag, if set, indicates that we are called in the
925 * process of shutting down a vnet instance. Currently only the
926 * vnet_if_return SYSUNINIT function sets it. Note: we can be called
927 * on a vnet instance shutdown without this flag being set, e.g., when
928 * the cloned interfaces are destoyed as first thing of teardown.
929 */
930 static int
931 if_detach_internal(struct ifnet *ifp, int vmove, struct if_clone **ifcp)
932 {
933 struct ifaddr *ifa;
934 int i;
935 struct domain *dp;
936 struct ifnet *iter;
937 int found = 0;
938 #ifdef VIMAGE
939 int shutdown;
940
941 shutdown = (ifp->if_vnet->vnet_state > SI_SUB_VNET &&
942 ifp->if_vnet->vnet_state < SI_SUB_VNET_DONE) ? 1 : 0;
943 #endif
944 IFNET_WLOCK();
945 TAILQ_FOREACH(iter, &V_ifnet, if_link)
946 if (iter == ifp) {
947 TAILQ_REMOVE(&V_ifnet, ifp, if_link);
948 found = 1;
949 break;
950 }
951 IFNET_WUNLOCK();
952 if (!found) {
953 /*
954 * While we would want to panic here, we cannot
955 * guarantee that the interface is indeed still on
956 * the list given we don't hold locks all the way.
957 */
958 return (ENOENT);
959 #if 0
960 if (vmove)
961 panic("%s: ifp=%p not on the ifnet tailq %p",
962 __func__, ifp, &V_ifnet);
963 else
964 return; /* XXX this should panic as well? */
965 #endif
966 }
967
968 /*
969 * At this point we know the interface still was on the ifnet list
970 * and we removed it so we are in a stable state.
971 */
972 #ifdef VIMAGE
973 curvnet->vnet_ifcnt--;
974 #endif
975
976 /*
977 * In any case (destroy or vmove) detach us from the groups
978 * and remove/wait for pending events on the taskq.
979 * XXX-BZ in theory an interface could still enqueue a taskq change?
980 */
981 if_delgroups(ifp);
982
983 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
984
985 /*
986 * Check if this is a cloned interface or not. Must do even if
987 * shutting down as a if_vmove_reclaim() would move the ifp and
988 * the if_clone_addgroup() will have a corrupted string overwise
989 * from a gibberish pointer.
990 */
991 if (vmove && ifcp != NULL)
992 *ifcp = if_clone_findifc(ifp);
993
994 if_down(ifp);
995
996 #ifdef VIMAGE
997 /*
998 * On VNET shutdown abort here as the stack teardown will do all
999 * the work top-down for us.
1000 */
1001 if (shutdown) {
1002 /*
1003 * In case of a vmove we are done here without error.
1004 * If we would signal an error it would lead to the same
1005 * abort as if we did not find the ifnet anymore.
1006 * if_detach() calls us in void context and does not care
1007 * about an early abort notification, so life is splendid :)
1008 */
1009 goto finish_vnet_shutdown;
1010 }
1011 #endif
1012
1013 /*
1014 * At this point we are not tearing down a VNET and are either
1015 * going to destroy or vmove the interface and have to cleanup
1016 * accordingly.
1017 */
1018
1019 /*
1020 * Remove routes and flush queues.
1021 */
1022 #ifdef ALTQ
1023 if (ALTQ_IS_ENABLED(&ifp->if_snd))
1024 altq_disable(&ifp->if_snd);
1025 if (ALTQ_IS_ATTACHED(&ifp->if_snd))
1026 altq_detach(&ifp->if_snd);
1027 #endif
1028
1029 if_purgeaddrs(ifp);
1030
1031 #ifdef INET
1032 in_ifdetach(ifp);
1033 #endif
1034
1035 #ifdef INET6
1036 /*
1037 * Remove all IPv6 kernel structs related to ifp. This should be done
1038 * before removing routing entries below, since IPv6 interface direct
1039 * routes are expected to be removed by the IPv6-specific kernel API.
1040 * Otherwise, the kernel will detect some inconsistency and bark it.
1041 */
1042 in6_ifdetach(ifp);
1043 #endif
1044 if_purgemaddrs(ifp);
1045
1046 /* Announce that the interface is gone. */
1047 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
1048 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
1049 if (IS_DEFAULT_VNET(curvnet))
1050 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL);
1051
1052 if (!vmove) {
1053 /*
1054 * Prevent further calls into the device driver via ifnet.
1055 */
1056 if_dead(ifp);
1057
1058 /*
1059 * Remove link ifaddr pointer and maybe decrement if_index.
1060 * Clean up all addresses.
1061 */
1062 ifp->if_addr = NULL;
1063
1064 /* We can now free link ifaddr. */
1065 IF_ADDR_WLOCK(ifp);
1066 if (!TAILQ_EMPTY(&ifp->if_addrhead)) {
1067 ifa = TAILQ_FIRST(&ifp->if_addrhead);
1068 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
1069 IF_ADDR_WUNLOCK(ifp);
1070 ifa_free(ifa);
1071 } else
1072 IF_ADDR_WUNLOCK(ifp);
1073 }
1074
1075 rt_flushifroutes(ifp);
1076
1077 #ifdef VIMAGE
1078 finish_vnet_shutdown:
1079 #endif
1080 /*
1081 * We cannot hold the lock over dom_ifdetach calls as they might
1082 * sleep, for example trying to drain a callout, thus open up the
1083 * theoretical race with re-attaching.
1084 */
1085 IF_AFDATA_LOCK(ifp);
1086 i = ifp->if_afdata_initialized;
1087 ifp->if_afdata_initialized = 0;
1088 IF_AFDATA_UNLOCK(ifp);
1089 for (dp = domains; i > 0 && dp; dp = dp->dom_next) {
1090 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) {
1091 (*dp->dom_ifdetach)(ifp,
1092 ifp->if_afdata[dp->dom_family]);
1093 ifp->if_afdata[dp->dom_family] = NULL;
1094 }
1095 }
1096
1097 return (0);
1098 }
1099
1100 #ifdef VIMAGE
1101 /*
1102 * if_vmove() performs a limited version of if_detach() in current
1103 * vnet and if_attach()es the ifnet to the vnet specified as 2nd arg.
1104 * An attempt is made to shrink if_index in current vnet, find an
1105 * unused if_index in target vnet and calls if_grow() if necessary,
1106 * and finally find an unused if_xname for the target vnet.
1107 */
1108 static void
1109 if_vmove(struct ifnet *ifp, struct vnet *new_vnet)
1110 {
1111 struct if_clone *ifc;
1112 u_int bif_dlt, bif_hdrlen;
1113 int rc;
1114
1115 /*
1116 * if_detach_internal() will call the eventhandler to notify
1117 * interface departure. That will detach if_bpf. We need to
1118 * safe the dlt and hdrlen so we can re-attach it later.
1119 */
1120 bpf_get_bp_params(ifp->if_bpf, &bif_dlt, &bif_hdrlen);
1121
1122 /*
1123 * Detach from current vnet, but preserve LLADDR info, do not
1124 * mark as dead etc. so that the ifnet can be reattached later.
1125 * If we cannot find it, we lost the race to someone else.
1126 */
1127 rc = if_detach_internal(ifp, 1, &ifc);
1128 if (rc != 0)
1129 return;
1130
1131 /*
1132 * Unlink the ifnet from ifindex_table[] in current vnet, and shrink
1133 * the if_index for that vnet if possible.
1134 *
1135 * NOTE: IFNET_WLOCK/IFNET_WUNLOCK() are assumed to be unvirtualized,
1136 * or we'd lock on one vnet and unlock on another.
1137 */
1138 IFNET_WLOCK();
1139 ifindex_free_locked(ifp->if_index);
1140 IFNET_WUNLOCK();
1141
1142 /*
1143 * Perform interface-specific reassignment tasks, if provided by
1144 * the driver.
1145 */
1146 if (ifp->if_reassign != NULL)
1147 ifp->if_reassign(ifp, new_vnet, NULL);
1148
1149 /*
1150 * Switch to the context of the target vnet.
1151 */
1152 CURVNET_SET_QUIET(new_vnet);
1153
1154 IFNET_WLOCK();
1155 ifp->if_index = ifindex_alloc();
1156 ifnet_setbyindex_locked(ifp->if_index, ifp);
1157 IFNET_WUNLOCK();
1158
1159 if_attach_internal(ifp, 1, ifc);
1160
1161 if (ifp->if_bpf == NULL)
1162 bpfattach(ifp, bif_dlt, bif_hdrlen);
1163
1164 CURVNET_RESTORE();
1165 }
1166
1167 /*
1168 * Move an ifnet to or from another child prison/vnet, specified by the jail id.
1169 */
1170 static int
1171 if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid)
1172 {
1173 struct prison *pr;
1174 struct ifnet *difp;
1175 int shutdown;
1176
1177 /* Try to find the prison within our visibility. */
1178 sx_slock(&allprison_lock);
1179 pr = prison_find_child(td->td_ucred->cr_prison, jid);
1180 sx_sunlock(&allprison_lock);
1181 if (pr == NULL)
1182 return (ENXIO);
1183 prison_hold_locked(pr);
1184 mtx_unlock(&pr->pr_mtx);
1185
1186 /* Do not try to move the iface from and to the same prison. */
1187 if (pr->pr_vnet == ifp->if_vnet) {
1188 prison_free(pr);
1189 return (EEXIST);
1190 }
1191
1192 /* Make sure the named iface does not exists in the dst. prison/vnet. */
1193 /* XXX Lock interfaces to avoid races. */
1194 CURVNET_SET_QUIET(pr->pr_vnet);
1195 difp = ifunit(ifname);
1196 if (difp != NULL) {
1197 CURVNET_RESTORE();
1198 prison_free(pr);
1199 return (EEXIST);
1200 }
1201
1202 /* Make sure the VNET is stable. */
1203 shutdown = (ifp->if_vnet->vnet_state > SI_SUB_VNET &&
1204 ifp->if_vnet->vnet_state < SI_SUB_VNET_DONE) ? 1 : 0;
1205 if (shutdown) {
1206 CURVNET_RESTORE();
1207 prison_free(pr);
1208 return (EBUSY);
1209 }
1210 CURVNET_RESTORE();
1211
1212 /* Move the interface into the child jail/vnet. */
1213 if_vmove(ifp, pr->pr_vnet);
1214
1215 /* Report the new if_xname back to the userland. */
1216 sprintf(ifname, "%s", ifp->if_xname);
1217
1218 prison_free(pr);
1219 return (0);
1220 }
1221
1222 static int
1223 if_vmove_reclaim(struct thread *td, char *ifname, int jid)
1224 {
1225 struct prison *pr;
1226 struct vnet *vnet_dst;
1227 struct ifnet *ifp;
1228 int shutdown;
1229
1230 /* Try to find the prison within our visibility. */
1231 sx_slock(&allprison_lock);
1232 pr = prison_find_child(td->td_ucred->cr_prison, jid);
1233 sx_sunlock(&allprison_lock);
1234 if (pr == NULL)
1235 return (ENXIO);
1236 prison_hold_locked(pr);
1237 mtx_unlock(&pr->pr_mtx);
1238
1239 /* Make sure the named iface exists in the source prison/vnet. */
1240 CURVNET_SET(pr->pr_vnet);
1241 ifp = ifunit(ifname); /* XXX Lock to avoid races. */
1242 if (ifp == NULL) {
1243 CURVNET_RESTORE();
1244 prison_free(pr);
1245 return (ENXIO);
1246 }
1247
1248 /* Do not try to move the iface from and to the same prison. */
1249 vnet_dst = TD_TO_VNET(td);
1250 if (vnet_dst == ifp->if_vnet) {
1251 CURVNET_RESTORE();
1252 prison_free(pr);
1253 return (EEXIST);
1254 }
1255
1256 /* Make sure the VNET is stable. */
1257 shutdown = (ifp->if_vnet->vnet_state > SI_SUB_VNET &&
1258 ifp->if_vnet->vnet_state < SI_SUB_VNET_DONE) ? 1 : 0;
1259 if (shutdown) {
1260 CURVNET_RESTORE();
1261 prison_free(pr);
1262 return (EBUSY);
1263 }
1264
1265 /* Get interface back from child jail/vnet. */
1266 if_vmove(ifp, vnet_dst);
1267 CURVNET_RESTORE();
1268
1269 /* Report the new if_xname back to the userland. */
1270 sprintf(ifname, "%s", ifp->if_xname);
1271
1272 prison_free(pr);
1273 return (0);
1274 }
1275 #endif /* VIMAGE */
1276
1277 /*
1278 * Add a group to an interface
1279 */
1280 int
1281 if_addgroup(struct ifnet *ifp, const char *groupname)
1282 {
1283 struct ifg_list *ifgl;
1284 struct ifg_group *ifg = NULL;
1285 struct ifg_member *ifgm;
1286 int new = 0;
1287
1288 if (groupname[0] && groupname[strlen(groupname) - 1] >= '' &&
1289 groupname[strlen(groupname) - 1] <= '9')
1290 return (EINVAL);
1291
1292 IFNET_WLOCK();
1293 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1294 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) {
1295 IFNET_WUNLOCK();
1296 return (EEXIST);
1297 }
1298
1299 if ((ifgl = (struct ifg_list *)malloc(sizeof(struct ifg_list), M_TEMP,
1300 M_NOWAIT)) == NULL) {
1301 IFNET_WUNLOCK();
1302 return (ENOMEM);
1303 }
1304
1305 if ((ifgm = (struct ifg_member *)malloc(sizeof(struct ifg_member),
1306 M_TEMP, M_NOWAIT)) == NULL) {
1307 free(ifgl, M_TEMP);
1308 IFNET_WUNLOCK();
1309 return (ENOMEM);
1310 }
1311
1312 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
1313 if (!strcmp(ifg->ifg_group, groupname))
1314 break;
1315
1316 if (ifg == NULL) {
1317 if ((ifg = (struct ifg_group *)malloc(sizeof(struct ifg_group),
1318 M_TEMP, M_NOWAIT)) == NULL) {
1319 free(ifgl, M_TEMP);
1320 free(ifgm, M_TEMP);
1321 IFNET_WUNLOCK();
1322 return (ENOMEM);
1323 }
1324 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group));
1325 ifg->ifg_refcnt = 0;
1326 TAILQ_INIT(&ifg->ifg_members);
1327 TAILQ_INSERT_TAIL(&V_ifg_head, ifg, ifg_next);
1328 new = 1;
1329 }
1330
1331 ifg->ifg_refcnt++;
1332 ifgl->ifgl_group = ifg;
1333 ifgm->ifgm_ifp = ifp;
1334
1335 IF_ADDR_WLOCK(ifp);
1336 TAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next);
1337 TAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next);
1338 IF_ADDR_WUNLOCK(ifp);
1339
1340 IFNET_WUNLOCK();
1341
1342 if (new)
1343 EVENTHANDLER_INVOKE(group_attach_event, ifg);
1344 EVENTHANDLER_INVOKE(group_change_event, groupname);
1345
1346 return (0);
1347 }
1348
1349 /*
1350 * Remove a group from an interface
1351 */
1352 int
1353 if_delgroup(struct ifnet *ifp, const char *groupname)
1354 {
1355 struct ifg_list *ifgl;
1356 struct ifg_member *ifgm;
1357
1358 IFNET_WLOCK();
1359 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1360 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname))
1361 break;
1362 if (ifgl == NULL) {
1363 IFNET_WUNLOCK();
1364 return (ENOENT);
1365 }
1366
1367 IF_ADDR_WLOCK(ifp);
1368 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next);
1369 IF_ADDR_WUNLOCK(ifp);
1370
1371 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next)
1372 if (ifgm->ifgm_ifp == ifp)
1373 break;
1374
1375 if (ifgm != NULL) {
1376 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifgm_next);
1377 free(ifgm, M_TEMP);
1378 }
1379
1380 if (--ifgl->ifgl_group->ifg_refcnt == 0) {
1381 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next);
1382 IFNET_WUNLOCK();
1383 EVENTHANDLER_INVOKE(group_detach_event, ifgl->ifgl_group);
1384 free(ifgl->ifgl_group, M_TEMP);
1385 } else
1386 IFNET_WUNLOCK();
1387
1388 free(ifgl, M_TEMP);
1389
1390 EVENTHANDLER_INVOKE(group_change_event, groupname);
1391
1392 return (0);
1393 }
1394
1395 /*
1396 * Remove an interface from all groups
1397 */
1398 static void
1399 if_delgroups(struct ifnet *ifp)
1400 {
1401 struct ifg_list *ifgl;
1402 struct ifg_member *ifgm;
1403 char groupname[IFNAMSIZ];
1404
1405 IFNET_WLOCK();
1406 while (!TAILQ_EMPTY(&ifp->if_groups)) {
1407 ifgl = TAILQ_FIRST(&ifp->if_groups);
1408
1409 strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ);
1410
1411 IF_ADDR_WLOCK(ifp);
1412 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next);
1413 IF_ADDR_WUNLOCK(ifp);
1414
1415 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next)
1416 if (ifgm->ifgm_ifp == ifp)
1417 break;
1418
1419 if (ifgm != NULL) {
1420 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm,
1421 ifgm_next);
1422 free(ifgm, M_TEMP);
1423 }
1424
1425 if (--ifgl->ifgl_group->ifg_refcnt == 0) {
1426 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next);
1427 IFNET_WUNLOCK();
1428 EVENTHANDLER_INVOKE(group_detach_event,
1429 ifgl->ifgl_group);
1430 free(ifgl->ifgl_group, M_TEMP);
1431 } else
1432 IFNET_WUNLOCK();
1433
1434 free(ifgl, M_TEMP);
1435
1436 EVENTHANDLER_INVOKE(group_change_event, groupname);
1437
1438 IFNET_WLOCK();
1439 }
1440 IFNET_WUNLOCK();
1441 }
1442
1443 /*
1444 * Stores all groups from an interface in memory pointed
1445 * to by data
1446 */
1447 static int
1448 if_getgroup(struct ifgroupreq *data, struct ifnet *ifp)
1449 {
1450 int len, error;
1451 struct ifg_list *ifgl;
1452 struct ifg_req ifgrq, *ifgp;
1453 struct ifgroupreq *ifgr = data;
1454
1455 if (ifgr->ifgr_len == 0) {
1456 IF_ADDR_RLOCK(ifp);
1457 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1458 ifgr->ifgr_len += sizeof(struct ifg_req);
1459 IF_ADDR_RUNLOCK(ifp);
1460 return (0);
1461 }
1462
1463 len = ifgr->ifgr_len;
1464 ifgp = ifgr->ifgr_groups;
1465 /* XXX: wire */
1466 IF_ADDR_RLOCK(ifp);
1467 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) {
1468 if (len < sizeof(ifgrq)) {
1469 IF_ADDR_RUNLOCK(ifp);
1470 return (EINVAL);
1471 }
1472 bzero(&ifgrq, sizeof ifgrq);
1473 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group,
1474 sizeof(ifgrq.ifgrq_group));
1475 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) {
1476 IF_ADDR_RUNLOCK(ifp);
1477 return (error);
1478 }
1479 len -= sizeof(ifgrq);
1480 ifgp++;
1481 }
1482 IF_ADDR_RUNLOCK(ifp);
1483
1484 return (0);
1485 }
1486
1487 /*
1488 * Stores all members of a group in memory pointed to by data
1489 */
1490 static int
1491 if_getgroupmembers(struct ifgroupreq *data)
1492 {
1493 struct ifgroupreq *ifgr = data;
1494 struct ifg_group *ifg;
1495 struct ifg_member *ifgm;
1496 struct ifg_req ifgrq, *ifgp;
1497 int len, error;
1498
1499 IFNET_RLOCK();
1500 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
1501 if (!strcmp(ifg->ifg_group, ifgr->ifgr_name))
1502 break;
1503 if (ifg == NULL) {
1504 IFNET_RUNLOCK();
1505 return (ENOENT);
1506 }
1507
1508 if (ifgr->ifgr_len == 0) {
1509 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next)
1510 ifgr->ifgr_len += sizeof(ifgrq);
1511 IFNET_RUNLOCK();
1512 return (0);
1513 }
1514
1515 len = ifgr->ifgr_len;
1516 ifgp = ifgr->ifgr_groups;
1517 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) {
1518 if (len < sizeof(ifgrq)) {
1519 IFNET_RUNLOCK();
1520 return (EINVAL);
1521 }
1522 bzero(&ifgrq, sizeof ifgrq);
1523 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname,
1524 sizeof(ifgrq.ifgrq_member));
1525 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) {
1526 IFNET_RUNLOCK();
1527 return (error);
1528 }
1529 len -= sizeof(ifgrq);
1530 ifgp++;
1531 }
1532 IFNET_RUNLOCK();
1533
1534 return (0);
1535 }
1536
1537 /*
1538 * Return counter values from counter(9)s stored in ifnet.
1539 */
1540 uint64_t
1541 if_get_counter_default(struct ifnet *ifp, ift_counter cnt)
1542 {
1543
1544 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1545
1546 return (counter_u64_fetch(ifp->if_counters[cnt]));
1547 }
1548
1549 /*
1550 * Increase an ifnet counter. Usually used for counters shared
1551 * between the stack and a driver, but function supports them all.
1552 */
1553 void
1554 if_inc_counter(struct ifnet *ifp, ift_counter cnt, int64_t inc)
1555 {
1556
1557 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1558
1559 counter_u64_add(ifp->if_counters[cnt], inc);
1560 }
1561
1562 /*
1563 * Copy data from ifnet to userland API structure if_data.
1564 */
1565 void
1566 if_data_copy(struct ifnet *ifp, struct if_data *ifd)
1567 {
1568
1569 ifd->ifi_type = ifp->if_type;
1570 ifd->ifi_physical = 0;
1571 ifd->ifi_addrlen = ifp->if_addrlen;
1572 ifd->ifi_hdrlen = ifp->if_hdrlen;
1573 ifd->ifi_link_state = ifp->if_link_state;
1574 ifd->ifi_vhid = 0;
1575 ifd->ifi_datalen = sizeof(struct if_data);
1576 ifd->ifi_mtu = ifp->if_mtu;
1577 ifd->ifi_metric = ifp->if_metric;
1578 ifd->ifi_baudrate = ifp->if_baudrate;
1579 ifd->ifi_hwassist = ifp->if_hwassist;
1580 ifd->ifi_epoch = ifp->if_epoch;
1581 ifd->ifi_lastchange = ifp->if_lastchange;
1582
1583 ifd->ifi_ipackets = ifp->if_get_counter(ifp, IFCOUNTER_IPACKETS);
1584 ifd->ifi_ierrors = ifp->if_get_counter(ifp, IFCOUNTER_IERRORS);
1585 ifd->ifi_opackets = ifp->if_get_counter(ifp, IFCOUNTER_OPACKETS);
1586 ifd->ifi_oerrors = ifp->if_get_counter(ifp, IFCOUNTER_OERRORS);
1587 ifd->ifi_collisions = ifp->if_get_counter(ifp, IFCOUNTER_COLLISIONS);
1588 ifd->ifi_ibytes = ifp->if_get_counter(ifp, IFCOUNTER_IBYTES);
1589 ifd->ifi_obytes = ifp->if_get_counter(ifp, IFCOUNTER_OBYTES);
1590 ifd->ifi_imcasts = ifp->if_get_counter(ifp, IFCOUNTER_IMCASTS);
1591 ifd->ifi_omcasts = ifp->if_get_counter(ifp, IFCOUNTER_OMCASTS);
1592 ifd->ifi_iqdrops = ifp->if_get_counter(ifp, IFCOUNTER_IQDROPS);
1593 ifd->ifi_oqdrops = ifp->if_get_counter(ifp, IFCOUNTER_OQDROPS);
1594 ifd->ifi_noproto = ifp->if_get_counter(ifp, IFCOUNTER_NOPROTO);
1595 }
1596
1597 /*
1598 * Wrapper functions for struct ifnet address list locking macros. These are
1599 * used by kernel modules to avoid encoding programming interface or binary
1600 * interface assumptions that may be violated when kernel-internal locking
1601 * approaches change.
1602 */
1603 void
1604 if_addr_rlock(struct ifnet *ifp)
1605 {
1606
1607 IF_ADDR_RLOCK(ifp);
1608 }
1609
1610 void
1611 if_addr_runlock(struct ifnet *ifp)
1612 {
1613
1614 IF_ADDR_RUNLOCK(ifp);
1615 }
1616
1617 void
1618 if_maddr_rlock(if_t ifp)
1619 {
1620
1621 IF_ADDR_RLOCK((struct ifnet *)ifp);
1622 }
1623
1624 void
1625 if_maddr_runlock(if_t ifp)
1626 {
1627
1628 IF_ADDR_RUNLOCK((struct ifnet *)ifp);
1629 }
1630
1631 /*
1632 * Initialization, destruction and refcounting functions for ifaddrs.
1633 */
1634 struct ifaddr *
1635 ifa_alloc(size_t size, int flags)
1636 {
1637 struct ifaddr *ifa;
1638
1639 KASSERT(size >= sizeof(struct ifaddr),
1640 ("%s: invalid size %zu", __func__, size));
1641
1642 ifa = malloc(size, M_IFADDR, M_ZERO | flags);
1643 if (ifa == NULL)
1644 return (NULL);
1645
1646 if ((ifa->ifa_opackets = counter_u64_alloc(flags)) == NULL)
1647 goto fail;
1648 if ((ifa->ifa_ipackets = counter_u64_alloc(flags)) == NULL)
1649 goto fail;
1650 if ((ifa->ifa_obytes = counter_u64_alloc(flags)) == NULL)
1651 goto fail;
1652 if ((ifa->ifa_ibytes = counter_u64_alloc(flags)) == NULL)
1653 goto fail;
1654
1655 refcount_init(&ifa->ifa_refcnt, 1);
1656
1657 return (ifa);
1658
1659 fail:
1660 /* free(NULL) is okay */
1661 counter_u64_free(ifa->ifa_opackets);
1662 counter_u64_free(ifa->ifa_ipackets);
1663 counter_u64_free(ifa->ifa_obytes);
1664 counter_u64_free(ifa->ifa_ibytes);
1665 free(ifa, M_IFADDR);
1666
1667 return (NULL);
1668 }
1669
1670 void
1671 ifa_ref(struct ifaddr *ifa)
1672 {
1673
1674 refcount_acquire(&ifa->ifa_refcnt);
1675 }
1676
1677 void
1678 ifa_free(struct ifaddr *ifa)
1679 {
1680
1681 if (refcount_release(&ifa->ifa_refcnt)) {
1682 counter_u64_free(ifa->ifa_opackets);
1683 counter_u64_free(ifa->ifa_ipackets);
1684 counter_u64_free(ifa->ifa_obytes);
1685 counter_u64_free(ifa->ifa_ibytes);
1686 free(ifa, M_IFADDR);
1687 }
1688 }
1689
1690 static int
1691 ifa_maintain_loopback_route(int cmd, const char *otype, struct ifaddr *ifa,
1692 struct sockaddr *ia)
1693 {
1694 int error;
1695 struct rt_addrinfo info;
1696 struct sockaddr_dl null_sdl;
1697 struct ifnet *ifp;
1698
1699 ifp = ifa->ifa_ifp;
1700
1701 bzero(&info, sizeof(info));
1702 if (cmd != RTM_DELETE)
1703 info.rti_ifp = V_loif;
1704 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC;
1705 info.rti_info[RTAX_DST] = ia;
1706 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl;
1707 link_init_sdl(ifp, (struct sockaddr *)&null_sdl, ifp->if_type);
1708
1709 error = rtrequest1_fib(cmd, &info, NULL, ifp->if_fib);
1710
1711 if (error != 0)
1712 log(LOG_DEBUG, "%s: %s failed for interface %s: %u\n",
1713 __func__, otype, if_name(ifp), error);
1714
1715 return (error);
1716 }
1717
1718 int
1719 ifa_add_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1720 {
1721
1722 return (ifa_maintain_loopback_route(RTM_ADD, "insertion", ifa, ia));
1723 }
1724
1725 int
1726 ifa_del_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1727 {
1728
1729 return (ifa_maintain_loopback_route(RTM_DELETE, "deletion", ifa, ia));
1730 }
1731
1732 int
1733 ifa_switch_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1734 {
1735
1736 return (ifa_maintain_loopback_route(RTM_CHANGE, "switch", ifa, ia));
1737 }
1738
1739 /*
1740 * XXX: Because sockaddr_dl has deeper structure than the sockaddr
1741 * structs used to represent other address families, it is necessary
1742 * to perform a different comparison.
1743 */
1744
1745 #define sa_dl_equal(a1, a2) \
1746 ((((const struct sockaddr_dl *)(a1))->sdl_len == \
1747 ((const struct sockaddr_dl *)(a2))->sdl_len) && \
1748 (bcmp(CLLADDR((const struct sockaddr_dl *)(a1)), \
1749 CLLADDR((const struct sockaddr_dl *)(a2)), \
1750 ((const struct sockaddr_dl *)(a1))->sdl_alen) == 0))
1751
1752 /*
1753 * Locate an interface based on a complete address.
1754 */
1755 /*ARGSUSED*/
1756 static struct ifaddr *
1757 ifa_ifwithaddr_internal(const struct sockaddr *addr, int getref)
1758 {
1759 struct ifnet *ifp;
1760 struct ifaddr *ifa;
1761
1762 IFNET_RLOCK_NOSLEEP();
1763 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1764 IF_ADDR_RLOCK(ifp);
1765 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1766 if (ifa->ifa_addr->sa_family != addr->sa_family)
1767 continue;
1768 if (sa_equal(addr, ifa->ifa_addr)) {
1769 if (getref)
1770 ifa_ref(ifa);
1771 IF_ADDR_RUNLOCK(ifp);
1772 goto done;
1773 }
1774 /* IP6 doesn't have broadcast */
1775 if ((ifp->if_flags & IFF_BROADCAST) &&
1776 ifa->ifa_broadaddr &&
1777 ifa->ifa_broadaddr->sa_len != 0 &&
1778 sa_equal(ifa->ifa_broadaddr, addr)) {
1779 if (getref)
1780 ifa_ref(ifa);
1781 IF_ADDR_RUNLOCK(ifp);
1782 goto done;
1783 }
1784 }
1785 IF_ADDR_RUNLOCK(ifp);
1786 }
1787 ifa = NULL;
1788 done:
1789 IFNET_RUNLOCK_NOSLEEP();
1790 return (ifa);
1791 }
1792
1793 struct ifaddr *
1794 ifa_ifwithaddr(const struct sockaddr *addr)
1795 {
1796
1797 return (ifa_ifwithaddr_internal(addr, 1));
1798 }
1799
1800 int
1801 ifa_ifwithaddr_check(const struct sockaddr *addr)
1802 {
1803
1804 return (ifa_ifwithaddr_internal(addr, 0) != NULL);
1805 }
1806
1807 /*
1808 * Locate an interface based on the broadcast address.
1809 */
1810 /* ARGSUSED */
1811 struct ifaddr *
1812 ifa_ifwithbroadaddr(const struct sockaddr *addr, int fibnum)
1813 {
1814 struct ifnet *ifp;
1815 struct ifaddr *ifa;
1816
1817 IFNET_RLOCK_NOSLEEP();
1818 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1819 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1820 continue;
1821 IF_ADDR_RLOCK(ifp);
1822 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1823 if (ifa->ifa_addr->sa_family != addr->sa_family)
1824 continue;
1825 if ((ifp->if_flags & IFF_BROADCAST) &&
1826 ifa->ifa_broadaddr &&
1827 ifa->ifa_broadaddr->sa_len != 0 &&
1828 sa_equal(ifa->ifa_broadaddr, addr)) {
1829 ifa_ref(ifa);
1830 IF_ADDR_RUNLOCK(ifp);
1831 goto done;
1832 }
1833 }
1834 IF_ADDR_RUNLOCK(ifp);
1835 }
1836 ifa = NULL;
1837 done:
1838 IFNET_RUNLOCK_NOSLEEP();
1839 return (ifa);
1840 }
1841
1842 /*
1843 * Locate the point to point interface with a given destination address.
1844 */
1845 /*ARGSUSED*/
1846 struct ifaddr *
1847 ifa_ifwithdstaddr(const struct sockaddr *addr, int fibnum)
1848 {
1849 struct ifnet *ifp;
1850 struct ifaddr *ifa;
1851
1852 IFNET_RLOCK_NOSLEEP();
1853 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1854 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
1855 continue;
1856 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1857 continue;
1858 IF_ADDR_RLOCK(ifp);
1859 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1860 if (ifa->ifa_addr->sa_family != addr->sa_family)
1861 continue;
1862 if (ifa->ifa_dstaddr != NULL &&
1863 sa_equal(addr, ifa->ifa_dstaddr)) {
1864 ifa_ref(ifa);
1865 IF_ADDR_RUNLOCK(ifp);
1866 goto done;
1867 }
1868 }
1869 IF_ADDR_RUNLOCK(ifp);
1870 }
1871 ifa = NULL;
1872 done:
1873 IFNET_RUNLOCK_NOSLEEP();
1874 return (ifa);
1875 }
1876
1877 /*
1878 * Find an interface on a specific network. If many, choice
1879 * is most specific found.
1880 */
1881 struct ifaddr *
1882 ifa_ifwithnet(const struct sockaddr *addr, int ignore_ptp, int fibnum)
1883 {
1884 struct ifnet *ifp;
1885 struct ifaddr *ifa;
1886 struct ifaddr *ifa_maybe = NULL;
1887 u_int af = addr->sa_family;
1888 const char *addr_data = addr->sa_data, *cplim;
1889
1890 /*
1891 * AF_LINK addresses can be looked up directly by their index number,
1892 * so do that if we can.
1893 */
1894 if (af == AF_LINK) {
1895 const struct sockaddr_dl *sdl = (const struct sockaddr_dl *)addr;
1896 if (sdl->sdl_index && sdl->sdl_index <= V_if_index)
1897 return (ifaddr_byindex(sdl->sdl_index));
1898 }
1899
1900 /*
1901 * Scan though each interface, looking for ones that have addresses
1902 * in this address family and the requested fib. Maintain a reference
1903 * on ifa_maybe once we find one, as we release the IF_ADDR_RLOCK() that
1904 * kept it stable when we move onto the next interface.
1905 */
1906 IFNET_RLOCK_NOSLEEP();
1907 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1908 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1909 continue;
1910 IF_ADDR_RLOCK(ifp);
1911 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1912 const char *cp, *cp2, *cp3;
1913
1914 if (ifa->ifa_addr->sa_family != af)
1915 next: continue;
1916 if (af == AF_INET &&
1917 ifp->if_flags & IFF_POINTOPOINT && !ignore_ptp) {
1918 /*
1919 * This is a bit broken as it doesn't
1920 * take into account that the remote end may
1921 * be a single node in the network we are
1922 * looking for.
1923 * The trouble is that we don't know the
1924 * netmask for the remote end.
1925 */
1926 if (ifa->ifa_dstaddr != NULL &&
1927 sa_equal(addr, ifa->ifa_dstaddr)) {
1928 ifa_ref(ifa);
1929 IF_ADDR_RUNLOCK(ifp);
1930 goto done;
1931 }
1932 } else {
1933 /*
1934 * Scan all the bits in the ifa's address.
1935 * If a bit dissagrees with what we are
1936 * looking for, mask it with the netmask
1937 * to see if it really matters.
1938 * (A byte at a time)
1939 */
1940 if (ifa->ifa_netmask == 0)
1941 continue;
1942 cp = addr_data;
1943 cp2 = ifa->ifa_addr->sa_data;
1944 cp3 = ifa->ifa_netmask->sa_data;
1945 cplim = ifa->ifa_netmask->sa_len
1946 + (char *)ifa->ifa_netmask;
1947 while (cp3 < cplim)
1948 if ((*cp++ ^ *cp2++) & *cp3++)
1949 goto next; /* next address! */
1950 /*
1951 * If the netmask of what we just found
1952 * is more specific than what we had before
1953 * (if we had one), or if the virtual status
1954 * of new prefix is better than of the old one,
1955 * then remember the new one before continuing
1956 * to search for an even better one.
1957 */
1958 if (ifa_maybe == NULL ||
1959 ifa_preferred(ifa_maybe, ifa) ||
1960 rn_refines((caddr_t)ifa->ifa_netmask,
1961 (caddr_t)ifa_maybe->ifa_netmask)) {
1962 if (ifa_maybe != NULL)
1963 ifa_free(ifa_maybe);
1964 ifa_maybe = ifa;
1965 ifa_ref(ifa_maybe);
1966 }
1967 }
1968 }
1969 IF_ADDR_RUNLOCK(ifp);
1970 }
1971 ifa = ifa_maybe;
1972 ifa_maybe = NULL;
1973 done:
1974 IFNET_RUNLOCK_NOSLEEP();
1975 if (ifa_maybe != NULL)
1976 ifa_free(ifa_maybe);
1977 return (ifa);
1978 }
1979
1980 /*
1981 * Find an interface address specific to an interface best matching
1982 * a given address.
1983 */
1984 struct ifaddr *
1985 ifaof_ifpforaddr(const struct sockaddr *addr, struct ifnet *ifp)
1986 {
1987 struct ifaddr *ifa;
1988 const char *cp, *cp2, *cp3;
1989 char *cplim;
1990 struct ifaddr *ifa_maybe = NULL;
1991 u_int af = addr->sa_family;
1992
1993 if (af >= AF_MAX)
1994 return (NULL);
1995 IF_ADDR_RLOCK(ifp);
1996 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1997 if (ifa->ifa_addr->sa_family != af)
1998 continue;
1999 if (ifa_maybe == NULL)
2000 ifa_maybe = ifa;
2001 if (ifa->ifa_netmask == 0) {
2002 if (sa_equal(addr, ifa->ifa_addr) ||
2003 (ifa->ifa_dstaddr &&
2004 sa_equal(addr, ifa->ifa_dstaddr)))
2005 goto done;
2006 continue;
2007 }
2008 if (ifp->if_flags & IFF_POINTOPOINT) {
2009 if (sa_equal(addr, ifa->ifa_dstaddr))
2010 goto done;
2011 } else {
2012 cp = addr->sa_data;
2013 cp2 = ifa->ifa_addr->sa_data;
2014 cp3 = ifa->ifa_netmask->sa_data;
2015 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
2016 for (; cp3 < cplim; cp3++)
2017 if ((*cp++ ^ *cp2++) & *cp3)
2018 break;
2019 if (cp3 == cplim)
2020 goto done;
2021 }
2022 }
2023 ifa = ifa_maybe;
2024 done:
2025 if (ifa != NULL)
2026 ifa_ref(ifa);
2027 IF_ADDR_RUNLOCK(ifp);
2028 return (ifa);
2029 }
2030
2031 /*
2032 * See whether new ifa is better than current one:
2033 * 1) A non-virtual one is preferred over virtual.
2034 * 2) A virtual in master state preferred over any other state.
2035 *
2036 * Used in several address selecting functions.
2037 */
2038 int
2039 ifa_preferred(struct ifaddr *cur, struct ifaddr *next)
2040 {
2041
2042 return (cur->ifa_carp && (!next->ifa_carp ||
2043 ((*carp_master_p)(next) && !(*carp_master_p)(cur))));
2044 }
2045
2046 #include <net/if_llatbl.h>
2047
2048 /*
2049 * Default action when installing a route with a Link Level gateway.
2050 * Lookup an appropriate real ifa to point to.
2051 * This should be moved to /sys/net/link.c eventually.
2052 */
2053 static void
2054 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info)
2055 {
2056 struct ifaddr *ifa, *oifa;
2057 struct sockaddr *dst;
2058 struct ifnet *ifp;
2059
2060 if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == NULL) ||
2061 ((ifp = ifa->ifa_ifp) == NULL) || ((dst = rt_key(rt)) == NULL))
2062 return;
2063 ifa = ifaof_ifpforaddr(dst, ifp);
2064 if (ifa) {
2065 oifa = rt->rt_ifa;
2066 rt->rt_ifa = ifa;
2067 ifa_free(oifa);
2068 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest)
2069 ifa->ifa_rtrequest(cmd, rt, info);
2070 }
2071 }
2072
2073 struct sockaddr_dl *
2074 link_alloc_sdl(size_t size, int flags)
2075 {
2076
2077 return (malloc(size, M_TEMP, flags));
2078 }
2079
2080 void
2081 link_free_sdl(struct sockaddr *sa)
2082 {
2083 free(sa, M_TEMP);
2084 }
2085
2086 /*
2087 * Fills in given sdl with interface basic info.
2088 * Returns pointer to filled sdl.
2089 */
2090 struct sockaddr_dl *
2091 link_init_sdl(struct ifnet *ifp, struct sockaddr *paddr, u_char iftype)
2092 {
2093 struct sockaddr_dl *sdl;
2094
2095 sdl = (struct sockaddr_dl *)paddr;
2096 memset(sdl, 0, sizeof(struct sockaddr_dl));
2097 sdl->sdl_len = sizeof(struct sockaddr_dl);
2098 sdl->sdl_family = AF_LINK;
2099 sdl->sdl_index = ifp->if_index;
2100 sdl->sdl_type = iftype;
2101
2102 return (sdl);
2103 }
2104
2105 /*
2106 * Mark an interface down and notify protocols of
2107 * the transition.
2108 */
2109 static void
2110 if_unroute(struct ifnet *ifp, int flag, int fam)
2111 {
2112 struct ifaddr *ifa;
2113
2114 KASSERT(flag == IFF_UP, ("if_unroute: flag != IFF_UP"));
2115
2116 ifp->if_flags &= ~flag;
2117 getmicrotime(&ifp->if_lastchange);
2118 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
2119 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
2120 pfctlinput(PRC_IFDOWN, ifa->ifa_addr);
2121 ifp->if_qflush(ifp);
2122
2123 if (ifp->if_carp)
2124 (*carp_linkstate_p)(ifp);
2125 rt_ifmsg(ifp);
2126 }
2127
2128 /*
2129 * Mark an interface up and notify protocols of
2130 * the transition.
2131 */
2132 static void
2133 if_route(struct ifnet *ifp, int flag, int fam)
2134 {
2135 struct ifaddr *ifa;
2136
2137 KASSERT(flag == IFF_UP, ("if_route: flag != IFF_UP"));
2138
2139 ifp->if_flags |= flag;
2140 getmicrotime(&ifp->if_lastchange);
2141 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
2142 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
2143 pfctlinput(PRC_IFUP, ifa->ifa_addr);
2144 if (ifp->if_carp)
2145 (*carp_linkstate_p)(ifp);
2146 rt_ifmsg(ifp);
2147 #ifdef INET6
2148 in6_if_up(ifp);
2149 #endif
2150 }
2151
2152 void (*vlan_link_state_p)(struct ifnet *); /* XXX: private from if_vlan */
2153 void (*vlan_trunk_cap_p)(struct ifnet *); /* XXX: private from if_vlan */
2154 struct ifnet *(*vlan_trunkdev_p)(struct ifnet *);
2155 struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t);
2156 int (*vlan_tag_p)(struct ifnet *, uint16_t *);
2157 int (*vlan_setcookie_p)(struct ifnet *, void *);
2158 void *(*vlan_cookie_p)(struct ifnet *);
2159
2160 /*
2161 * Handle a change in the interface link state. To avoid LORs
2162 * between driver lock and upper layer locks, as well as possible
2163 * recursions, we post event to taskqueue, and all job
2164 * is done in static do_link_state_change().
2165 */
2166 void
2167 if_link_state_change(struct ifnet *ifp, int link_state)
2168 {
2169 /* Return if state hasn't changed. */
2170 if (ifp->if_link_state == link_state)
2171 return;
2172
2173 ifp->if_link_state = link_state;
2174
2175 taskqueue_enqueue(taskqueue_swi, &ifp->if_linktask);
2176 }
2177
2178 static void
2179 do_link_state_change(void *arg, int pending)
2180 {
2181 struct ifnet *ifp = (struct ifnet *)arg;
2182 int link_state = ifp->if_link_state;
2183 CURVNET_SET(ifp->if_vnet);
2184
2185 /* Notify that the link state has changed. */
2186 rt_ifmsg(ifp);
2187 if (ifp->if_vlantrunk != NULL)
2188 (*vlan_link_state_p)(ifp);
2189
2190 if ((ifp->if_type == IFT_ETHER || ifp->if_type == IFT_L2VLAN) &&
2191 ifp->if_l2com != NULL)
2192 (*ng_ether_link_state_p)(ifp, link_state);
2193 if (ifp->if_carp)
2194 (*carp_linkstate_p)(ifp);
2195 if (ifp->if_bridge)
2196 (*bridge_linkstate_p)(ifp);
2197 if (ifp->if_lagg)
2198 (*lagg_linkstate_p)(ifp, link_state);
2199
2200 if (IS_DEFAULT_VNET(curvnet))
2201 devctl_notify("IFNET", ifp->if_xname,
2202 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN",
2203 NULL);
2204 if (pending > 1)
2205 if_printf(ifp, "%d link states coalesced\n", pending);
2206 if (log_link_state_change)
2207 log(LOG_NOTICE, "%s: link state changed to %s\n", ifp->if_xname,
2208 (link_state == LINK_STATE_UP) ? "UP" : "DOWN" );
2209 EVENTHANDLER_INVOKE(ifnet_link_event, ifp, ifp->if_link_state);
2210 CURVNET_RESTORE();
2211 }
2212
2213 /*
2214 * Mark an interface down and notify protocols of
2215 * the transition.
2216 */
2217 void
2218 if_down(struct ifnet *ifp)
2219 {
2220
2221 if_unroute(ifp, IFF_UP, AF_UNSPEC);
2222 }
2223
2224 /*
2225 * Mark an interface up and notify protocols of
2226 * the transition.
2227 */
2228 void
2229 if_up(struct ifnet *ifp)
2230 {
2231
2232 if_route(ifp, IFF_UP, AF_UNSPEC);
2233 }
2234
2235 /*
2236 * Flush an interface queue.
2237 */
2238 void
2239 if_qflush(struct ifnet *ifp)
2240 {
2241 struct mbuf *m, *n;
2242 struct ifaltq *ifq;
2243
2244 ifq = &ifp->if_snd;
2245 IFQ_LOCK(ifq);
2246 #ifdef ALTQ
2247 if (ALTQ_IS_ENABLED(ifq))
2248 ALTQ_PURGE(ifq);
2249 #endif
2250 n = ifq->ifq_head;
2251 while ((m = n) != NULL) {
2252 n = m->m_nextpkt;
2253 m_freem(m);
2254 }
2255 ifq->ifq_head = 0;
2256 ifq->ifq_tail = 0;
2257 ifq->ifq_len = 0;
2258 IFQ_UNLOCK(ifq);
2259 }
2260
2261 /*
2262 * Map interface name to interface structure pointer, with or without
2263 * returning a reference.
2264 */
2265 struct ifnet *
2266 ifunit_ref(const char *name)
2267 {
2268 struct ifnet *ifp;
2269
2270 IFNET_RLOCK_NOSLEEP();
2271 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2272 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0 &&
2273 !(ifp->if_flags & IFF_DYING))
2274 break;
2275 }
2276 if (ifp != NULL)
2277 if_ref(ifp);
2278 IFNET_RUNLOCK_NOSLEEP();
2279 return (ifp);
2280 }
2281
2282 struct ifnet *
2283 ifunit(const char *name)
2284 {
2285 struct ifnet *ifp;
2286
2287 IFNET_RLOCK_NOSLEEP();
2288 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2289 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0)
2290 break;
2291 }
2292 IFNET_RUNLOCK_NOSLEEP();
2293 return (ifp);
2294 }
2295
2296 /*
2297 * Hardware specific interface ioctls.
2298 */
2299 static int
2300 ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td)
2301 {
2302 struct ifreq *ifr;
2303 int error = 0;
2304 int new_flags, temp_flags;
2305 size_t namelen, onamelen;
2306 size_t descrlen;
2307 char *descrbuf, *odescrbuf;
2308 char new_name[IFNAMSIZ];
2309 struct ifaddr *ifa;
2310 struct sockaddr_dl *sdl;
2311
2312 ifr = (struct ifreq *)data;
2313 switch (cmd) {
2314 case SIOCGIFINDEX:
2315 ifr->ifr_index = ifp->if_index;
2316 break;
2317
2318 case SIOCGIFFLAGS:
2319 temp_flags = ifp->if_flags | ifp->if_drv_flags;
2320 ifr->ifr_flags = temp_flags & 0xffff;
2321 ifr->ifr_flagshigh = temp_flags >> 16;
2322 break;
2323
2324 case SIOCGIFCAP:
2325 ifr->ifr_reqcap = ifp->if_capabilities;
2326 ifr->ifr_curcap = ifp->if_capenable;
2327 break;
2328
2329 #ifdef MAC
2330 case SIOCGIFMAC:
2331 error = mac_ifnet_ioctl_get(td->td_ucred, ifr, ifp);
2332 break;
2333 #endif
2334
2335 case SIOCGIFMETRIC:
2336 ifr->ifr_metric = ifp->if_metric;
2337 break;
2338
2339 case SIOCGIFMTU:
2340 ifr->ifr_mtu = ifp->if_mtu;
2341 break;
2342
2343 case SIOCGIFPHYS:
2344 /* XXXGL: did this ever worked? */
2345 ifr->ifr_phys = 0;
2346 break;
2347
2348 case SIOCGIFDESCR:
2349 error = 0;
2350 sx_slock(&ifdescr_sx);
2351 if (ifp->if_description == NULL)
2352 error = ENOMSG;
2353 else {
2354 /* space for terminating nul */
2355 descrlen = strlen(ifp->if_description) + 1;
2356 if (ifr->ifr_buffer.length < descrlen)
2357 ifr->ifr_buffer.buffer = NULL;
2358 else
2359 error = copyout(ifp->if_description,
2360 ifr->ifr_buffer.buffer, descrlen);
2361 ifr->ifr_buffer.length = descrlen;
2362 }
2363 sx_sunlock(&ifdescr_sx);
2364 break;
2365
2366 case SIOCSIFDESCR:
2367 error = priv_check(td, PRIV_NET_SETIFDESCR);
2368 if (error)
2369 return (error);
2370
2371 /*
2372 * Copy only (length-1) bytes to make sure that
2373 * if_description is always nul terminated. The
2374 * length parameter is supposed to count the
2375 * terminating nul in.
2376 */
2377 if (ifr->ifr_buffer.length > ifdescr_maxlen)
2378 return (ENAMETOOLONG);
2379 else if (ifr->ifr_buffer.length == 0)
2380 descrbuf = NULL;
2381 else {
2382 descrbuf = malloc(ifr->ifr_buffer.length, M_IFDESCR,
2383 M_WAITOK | M_ZERO);
2384 error = copyin(ifr->ifr_buffer.buffer, descrbuf,
2385 ifr->ifr_buffer.length - 1);
2386 if (error) {
2387 free(descrbuf, M_IFDESCR);
2388 break;
2389 }
2390 }
2391
2392 sx_xlock(&ifdescr_sx);
2393 odescrbuf = ifp->if_description;
2394 ifp->if_description = descrbuf;
2395 sx_xunlock(&ifdescr_sx);
2396
2397 getmicrotime(&ifp->if_lastchange);
2398 free(odescrbuf, M_IFDESCR);
2399 break;
2400
2401 case SIOCGIFFIB:
2402 ifr->ifr_fib = ifp->if_fib;
2403 break;
2404
2405 case SIOCSIFFIB:
2406 error = priv_check(td, PRIV_NET_SETIFFIB);
2407 if (error)
2408 return (error);
2409 if (ifr->ifr_fib >= rt_numfibs)
2410 return (EINVAL);
2411
2412 ifp->if_fib = ifr->ifr_fib;
2413 break;
2414
2415 case SIOCSIFFLAGS:
2416 error = priv_check(td, PRIV_NET_SETIFFLAGS);
2417 if (error)
2418 return (error);
2419 /*
2420 * Currently, no driver owned flags pass the IFF_CANTCHANGE
2421 * check, so we don't need special handling here yet.
2422 */
2423 new_flags = (ifr->ifr_flags & 0xffff) |
2424 (ifr->ifr_flagshigh << 16);
2425 if (ifp->if_flags & IFF_UP &&
2426 (new_flags & IFF_UP) == 0) {
2427 if_down(ifp);
2428 } else if (new_flags & IFF_UP &&
2429 (ifp->if_flags & IFF_UP) == 0) {
2430 if_up(ifp);
2431 }
2432 /* See if permanently promiscuous mode bit is about to flip */
2433 if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) {
2434 if (new_flags & IFF_PPROMISC)
2435 ifp->if_flags |= IFF_PROMISC;
2436 else if (ifp->if_pcount == 0)
2437 ifp->if_flags &= ~IFF_PROMISC;
2438 if (log_promisc_mode_change)
2439 log(LOG_INFO, "%s: permanently promiscuous mode %s\n",
2440 ifp->if_xname,
2441 ((new_flags & IFF_PPROMISC) ?
2442 "enabled" : "disabled"));
2443 }
2444 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
2445 (new_flags &~ IFF_CANTCHANGE);
2446 if (ifp->if_ioctl) {
2447 (void) (*ifp->if_ioctl)(ifp, cmd, data);
2448 }
2449 getmicrotime(&ifp->if_lastchange);
2450 break;
2451
2452 case SIOCSIFCAP:
2453 error = priv_check(td, PRIV_NET_SETIFCAP);
2454 if (error)
2455 return (error);
2456 if (ifp->if_ioctl == NULL)
2457 return (EOPNOTSUPP);
2458 if (ifr->ifr_reqcap & ~ifp->if_capabilities)
2459 return (EINVAL);
2460 error = (*ifp->if_ioctl)(ifp, cmd, data);
2461 if (error == 0)
2462 getmicrotime(&ifp->if_lastchange);
2463 break;
2464
2465 #ifdef MAC
2466 case SIOCSIFMAC:
2467 error = mac_ifnet_ioctl_set(td->td_ucred, ifr, ifp);
2468 break;
2469 #endif
2470
2471 case SIOCSIFNAME:
2472 error = priv_check(td, PRIV_NET_SETIFNAME);
2473 if (error)
2474 return (error);
2475 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL);
2476 if (error != 0)
2477 return (error);
2478 if (new_name[0] == '\0')
2479 return (EINVAL);
2480 if (new_name[IFNAMSIZ-1] != '\0') {
2481 new_name[IFNAMSIZ-1] = '\0';
2482 if (strlen(new_name) == IFNAMSIZ-1)
2483 return (EINVAL);
2484 }
2485 if (ifunit(new_name) != NULL)
2486 return (EEXIST);
2487
2488 /*
2489 * XXX: Locking. Nothing else seems to lock if_flags,
2490 * and there are numerous other races with the
2491 * ifunit() checks not being atomic with namespace
2492 * changes (renames, vmoves, if_attach, etc).
2493 */
2494 ifp->if_flags |= IFF_RENAMING;
2495
2496 /* Announce the departure of the interface. */
2497 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
2498 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
2499
2500 log(LOG_INFO, "%s: changing name to '%s'\n",
2501 ifp->if_xname, new_name);
2502
2503 IF_ADDR_WLOCK(ifp);
2504 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname));
2505 ifa = ifp->if_addr;
2506 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
2507 namelen = strlen(new_name);
2508 onamelen = sdl->sdl_nlen;
2509 /*
2510 * Move the address if needed. This is safe because we
2511 * allocate space for a name of length IFNAMSIZ when we
2512 * create this in if_attach().
2513 */
2514 if (namelen != onamelen) {
2515 bcopy(sdl->sdl_data + onamelen,
2516 sdl->sdl_data + namelen, sdl->sdl_alen);
2517 }
2518 bcopy(new_name, sdl->sdl_data, namelen);
2519 sdl->sdl_nlen = namelen;
2520 sdl = (struct sockaddr_dl *)ifa->ifa_netmask;
2521 bzero(sdl->sdl_data, onamelen);
2522 while (namelen != 0)
2523 sdl->sdl_data[--namelen] = 0xff;
2524 IF_ADDR_WUNLOCK(ifp);
2525
2526 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
2527 /* Announce the return of the interface. */
2528 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
2529
2530 ifp->if_flags &= ~IFF_RENAMING;
2531 break;
2532
2533 #ifdef VIMAGE
2534 case SIOCSIFVNET:
2535 error = priv_check(td, PRIV_NET_SETIFVNET);
2536 if (error)
2537 return (error);
2538 error = if_vmove_loan(td, ifp, ifr->ifr_name, ifr->ifr_jid);
2539 break;
2540 #endif
2541
2542 case SIOCSIFMETRIC:
2543 error = priv_check(td, PRIV_NET_SETIFMETRIC);
2544 if (error)
2545 return (error);
2546 ifp->if_metric = ifr->ifr_metric;
2547 getmicrotime(&ifp->if_lastchange);
2548 break;
2549
2550 case SIOCSIFPHYS:
2551 error = priv_check(td, PRIV_NET_SETIFPHYS);
2552 if (error)
2553 return (error);
2554 if (ifp->if_ioctl == NULL)
2555 return (EOPNOTSUPP);
2556 error = (*ifp->if_ioctl)(ifp, cmd, data);
2557 if (error == 0)
2558 getmicrotime(&ifp->if_lastchange);
2559 break;
2560
2561 case SIOCSIFMTU:
2562 {
2563 u_long oldmtu = ifp->if_mtu;
2564
2565 error = priv_check(td, PRIV_NET_SETIFMTU);
2566 if (error)
2567 return (error);
2568 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU)
2569 return (EINVAL);
2570 if (ifp->if_ioctl == NULL)
2571 return (EOPNOTSUPP);
2572 error = (*ifp->if_ioctl)(ifp, cmd, data);
2573 if (error == 0) {
2574 getmicrotime(&ifp->if_lastchange);
2575 rt_ifmsg(ifp);
2576 }
2577 /*
2578 * If the link MTU changed, do network layer specific procedure.
2579 */
2580 if (ifp->if_mtu != oldmtu) {
2581 #ifdef INET6
2582 nd6_setmtu(ifp);
2583 #endif
2584 rt_updatemtu(ifp);
2585 }
2586 break;
2587 }
2588
2589 case SIOCADDMULTI:
2590 case SIOCDELMULTI:
2591 if (cmd == SIOCADDMULTI)
2592 error = priv_check(td, PRIV_NET_ADDMULTI);
2593 else
2594 error = priv_check(td, PRIV_NET_DELMULTI);
2595 if (error)
2596 return (error);
2597
2598 /* Don't allow group membership on non-multicast interfaces. */
2599 if ((ifp->if_flags & IFF_MULTICAST) == 0)
2600 return (EOPNOTSUPP);
2601
2602 /* Don't let users screw up protocols' entries. */
2603 if (ifr->ifr_addr.sa_family != AF_LINK)
2604 return (EINVAL);
2605
2606 if (cmd == SIOCADDMULTI) {
2607 struct ifmultiaddr *ifma;
2608
2609 /*
2610 * Userland is only permitted to join groups once
2611 * via the if_addmulti() KPI, because it cannot hold
2612 * struct ifmultiaddr * between calls. It may also
2613 * lose a race while we check if the membership
2614 * already exists.
2615 */
2616 IF_ADDR_RLOCK(ifp);
2617 ifma = if_findmulti(ifp, &ifr->ifr_addr);
2618 IF_ADDR_RUNLOCK(ifp);
2619 if (ifma != NULL)
2620 error = EADDRINUSE;
2621 else
2622 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma);
2623 } else {
2624 error = if_delmulti(ifp, &ifr->ifr_addr);
2625 }
2626 if (error == 0)
2627 getmicrotime(&ifp->if_lastchange);
2628 break;
2629
2630 case SIOCSIFPHYADDR:
2631 case SIOCDIFPHYADDR:
2632 #ifdef INET6
2633 case SIOCSIFPHYADDR_IN6:
2634 #endif
2635 case SIOCSIFMEDIA:
2636 case SIOCSIFGENERIC:
2637 error = priv_check(td, PRIV_NET_HWIOCTL);
2638 if (error)
2639 return (error);
2640 if (ifp->if_ioctl == NULL)
2641 return (EOPNOTSUPP);
2642 error = (*ifp->if_ioctl)(ifp, cmd, data);
2643 if (error == 0)
2644 getmicrotime(&ifp->if_lastchange);
2645 break;
2646
2647 case SIOCGIFSTATUS:
2648 case SIOCGIFPSRCADDR:
2649 case SIOCGIFPDSTADDR:
2650 case SIOCGIFMEDIA:
2651 case SIOCGIFXMEDIA:
2652 case SIOCGIFGENERIC:
2653 if (ifp->if_ioctl == NULL)
2654 return (EOPNOTSUPP);
2655 error = (*ifp->if_ioctl)(ifp, cmd, data);
2656 break;
2657
2658 case SIOCSIFLLADDR:
2659 error = priv_check(td, PRIV_NET_SETLLADDR);
2660 if (error)
2661 return (error);
2662 error = if_setlladdr(ifp,
2663 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len);
2664 break;
2665
2666 case SIOCAIFGROUP:
2667 {
2668 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr;
2669
2670 error = priv_check(td, PRIV_NET_ADDIFGROUP);
2671 if (error)
2672 return (error);
2673 if ((error = if_addgroup(ifp, ifgr->ifgr_group)))
2674 return (error);
2675 break;
2676 }
2677
2678 case SIOCGIFGROUP:
2679 if ((error = if_getgroup((struct ifgroupreq *)ifr, ifp)))
2680 return (error);
2681 break;
2682
2683 case SIOCDIFGROUP:
2684 {
2685 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr;
2686
2687 error = priv_check(td, PRIV_NET_DELIFGROUP);
2688 if (error)
2689 return (error);
2690 if ((error = if_delgroup(ifp, ifgr->ifgr_group)))
2691 return (error);
2692 break;
2693 }
2694
2695 default:
2696 error = ENOIOCTL;
2697 break;
2698 }
2699 return (error);
2700 }
2701
2702 /* COMPAT_SVR4 */
2703 #define OSIOCGIFCONF _IOWR('i', 20, struct ifconf)
2704
2705 #ifdef COMPAT_FREEBSD32
2706 struct ifconf32 {
2707 int32_t ifc_len;
2708 union {
2709 uint32_t ifcu_buf;
2710 uint32_t ifcu_req;
2711 } ifc_ifcu;
2712 };
2713 #define SIOCGIFCONF32 _IOWR('i', 36, struct ifconf32)
2714 #endif
2715
2716 /*
2717 * Interface ioctls.
2718 */
2719 int
2720 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td)
2721 {
2722 struct ifnet *ifp;
2723 struct ifreq *ifr;
2724 int error;
2725 int oif_flags;
2726 #ifdef VIMAGE
2727 int shutdown;
2728 #endif
2729
2730 CURVNET_SET(so->so_vnet);
2731 #ifdef VIMAGE
2732 /* Make sure the VNET is stable. */
2733 shutdown = (so->so_vnet->vnet_state > SI_SUB_VNET &&
2734 so->so_vnet->vnet_state < SI_SUB_VNET_DONE) ? 1 : 0;
2735 if (shutdown) {
2736 CURVNET_RESTORE();
2737 return (EBUSY);
2738 }
2739 #endif
2740
2741
2742 switch (cmd) {
2743 case SIOCGIFCONF:
2744 case OSIOCGIFCONF: /* COMPAT_SVR4 */
2745 error = ifconf(cmd, data);
2746 CURVNET_RESTORE();
2747 return (error);
2748
2749 #ifdef COMPAT_FREEBSD32
2750 case SIOCGIFCONF32:
2751 {
2752 struct ifconf32 *ifc32;
2753 struct ifconf ifc;
2754
2755 ifc32 = (struct ifconf32 *)data;
2756 ifc.ifc_len = ifc32->ifc_len;
2757 ifc.ifc_buf = PTRIN(ifc32->ifc_buf);
2758
2759 error = ifconf(SIOCGIFCONF, (void *)&ifc);
2760 CURVNET_RESTORE();
2761 if (error == 0)
2762 ifc32->ifc_len = ifc.ifc_len;
2763 return (error);
2764 }
2765 #endif
2766 }
2767 ifr = (struct ifreq *)data;
2768
2769 switch (cmd) {
2770 #ifdef VIMAGE
2771 case SIOCSIFRVNET:
2772 error = priv_check(td, PRIV_NET_SETIFVNET);
2773 if (error == 0)
2774 error = if_vmove_reclaim(td, ifr->ifr_name,
2775 ifr->ifr_jid);
2776 CURVNET_RESTORE();
2777 return (error);
2778 #endif
2779 case SIOCIFCREATE:
2780 case SIOCIFCREATE2:
2781 error = priv_check(td, PRIV_NET_IFCREATE);
2782 if (error == 0)
2783 error = if_clone_create(ifr->ifr_name,
2784 sizeof(ifr->ifr_name),
2785 cmd == SIOCIFCREATE2 ? ifr->ifr_data : NULL);
2786 CURVNET_RESTORE();
2787 return (error);
2788 case SIOCIFDESTROY:
2789 error = priv_check(td, PRIV_NET_IFDESTROY);
2790 if (error == 0)
2791 error = if_clone_destroy(ifr->ifr_name);
2792 CURVNET_RESTORE();
2793 return (error);
2794
2795 case SIOCIFGCLONERS:
2796 error = if_clone_list((struct if_clonereq *)data);
2797 CURVNET_RESTORE();
2798 return (error);
2799 case SIOCGIFGMEMB:
2800 error = if_getgroupmembers((struct ifgroupreq *)data);
2801 CURVNET_RESTORE();
2802 return (error);
2803 #if defined(INET) || defined(INET6)
2804 case SIOCSVH:
2805 case SIOCGVH:
2806 if (carp_ioctl_p == NULL)
2807 error = EPROTONOSUPPORT;
2808 else
2809 error = (*carp_ioctl_p)(ifr, cmd, td);
2810 CURVNET_RESTORE();
2811 return (error);
2812 #endif
2813 }
2814
2815 ifp = ifunit_ref(ifr->ifr_name);
2816 if (ifp == NULL) {
2817 CURVNET_RESTORE();
2818 return (ENXIO);
2819 }
2820
2821 error = ifhwioctl(cmd, ifp, data, td);
2822 if (error != ENOIOCTL) {
2823 if_rele(ifp);
2824 CURVNET_RESTORE();
2825 return (error);
2826 }
2827
2828 oif_flags = ifp->if_flags;
2829 if (so->so_proto == NULL) {
2830 if_rele(ifp);
2831 CURVNET_RESTORE();
2832 return (EOPNOTSUPP);
2833 }
2834
2835 /*
2836 * Pass the request on to the socket control method, and if the
2837 * latter returns EOPNOTSUPP, directly to the interface.
2838 *
2839 * Make an exception for the legacy SIOCSIF* requests. Drivers
2840 * trust SIOCSIFADDR et al to come from an already privileged
2841 * layer, and do not perform any credentials checks or input
2842 * validation.
2843 */
2844 error = ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data,
2845 ifp, td));
2846 if (error == EOPNOTSUPP && ifp != NULL && ifp->if_ioctl != NULL &&
2847 cmd != SIOCSIFADDR && cmd != SIOCSIFBRDADDR &&
2848 cmd != SIOCSIFDSTADDR && cmd != SIOCSIFNETMASK)
2849 error = (*ifp->if_ioctl)(ifp, cmd, data);
2850
2851 if ((oif_flags ^ ifp->if_flags) & IFF_UP) {
2852 #ifdef INET6
2853 if (ifp->if_flags & IFF_UP)
2854 in6_if_up(ifp);
2855 #endif
2856 }
2857 if_rele(ifp);
2858 CURVNET_RESTORE();
2859 return (error);
2860 }
2861
2862 /*
2863 * The code common to handling reference counted flags,
2864 * e.g., in ifpromisc() and if_allmulti().
2865 * The "pflag" argument can specify a permanent mode flag to check,
2866 * such as IFF_PPROMISC for promiscuous mode; should be 0 if none.
2867 *
2868 * Only to be used on stack-owned flags, not driver-owned flags.
2869 */
2870 static int
2871 if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch)
2872 {
2873 struct ifreq ifr;
2874 int error;
2875 int oldflags, oldcount;
2876
2877 /* Sanity checks to catch programming errors */
2878 KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0,
2879 ("%s: setting driver-owned flag %d", __func__, flag));
2880
2881 if (onswitch)
2882 KASSERT(*refcount >= 0,
2883 ("%s: increment negative refcount %d for flag %d",
2884 __func__, *refcount, flag));
2885 else
2886 KASSERT(*refcount > 0,
2887 ("%s: decrement non-positive refcount %d for flag %d",
2888 __func__, *refcount, flag));
2889
2890 /* In case this mode is permanent, just touch refcount */
2891 if (ifp->if_flags & pflag) {
2892 *refcount += onswitch ? 1 : -1;
2893 return (0);
2894 }
2895
2896 /* Save ifnet parameters for if_ioctl() may fail */
2897 oldcount = *refcount;
2898 oldflags = ifp->if_flags;
2899
2900 /*
2901 * See if we aren't the only and touching refcount is enough.
2902 * Actually toggle interface flag if we are the first or last.
2903 */
2904 if (onswitch) {
2905 if ((*refcount)++)
2906 return (0);
2907 ifp->if_flags |= flag;
2908 } else {
2909 if (--(*refcount))
2910 return (0);
2911 ifp->if_flags &= ~flag;
2912 }
2913
2914 /* Call down the driver since we've changed interface flags */
2915 if (ifp->if_ioctl == NULL) {
2916 error = EOPNOTSUPP;
2917 goto recover;
2918 }
2919 ifr.ifr_flags = ifp->if_flags & 0xffff;
2920 ifr.ifr_flagshigh = ifp->if_flags >> 16;
2921 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
2922 if (error)
2923 goto recover;
2924 /* Notify userland that interface flags have changed */
2925 rt_ifmsg(ifp);
2926 return (0);
2927
2928 recover:
2929 /* Recover after driver error */
2930 *refcount = oldcount;
2931 ifp->if_flags = oldflags;
2932 return (error);
2933 }
2934
2935 /*
2936 * Set/clear promiscuous mode on interface ifp based on the truth value
2937 * of pswitch. The calls are reference counted so that only the first
2938 * "on" request actually has an effect, as does the final "off" request.
2939 * Results are undefined if the "off" and "on" requests are not matched.
2940 */
2941 int
2942 ifpromisc(struct ifnet *ifp, int pswitch)
2943 {
2944 int error;
2945 int oldflags = ifp->if_flags;
2946
2947 error = if_setflag(ifp, IFF_PROMISC, IFF_PPROMISC,
2948 &ifp->if_pcount, pswitch);
2949 /* If promiscuous mode status has changed, log a message */
2950 if (error == 0 && ((ifp->if_flags ^ oldflags) & IFF_PROMISC) &&
2951 log_promisc_mode_change)
2952 log(LOG_INFO, "%s: promiscuous mode %s\n",
2953 ifp->if_xname,
2954 (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled");
2955 return (error);
2956 }
2957
2958 /*
2959 * Return interface configuration
2960 * of system. List may be used
2961 * in later ioctl's (above) to get
2962 * other information.
2963 */
2964 /*ARGSUSED*/
2965 static int
2966 ifconf(u_long cmd, caddr_t data)
2967 {
2968 struct ifconf *ifc = (struct ifconf *)data;
2969 struct ifnet *ifp;
2970 struct ifaddr *ifa;
2971 struct ifreq ifr;
2972 struct sbuf *sb;
2973 int error, full = 0, valid_len, max_len;
2974
2975 /* Limit initial buffer size to MAXPHYS to avoid DoS from userspace. */
2976 max_len = MAXPHYS - 1;
2977
2978 /* Prevent hostile input from being able to crash the system */
2979 if (ifc->ifc_len <= 0)
2980 return (EINVAL);
2981
2982 again:
2983 if (ifc->ifc_len <= max_len) {
2984 max_len = ifc->ifc_len;
2985 full = 1;
2986 }
2987 sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN);
2988 max_len = 0;
2989 valid_len = 0;
2990
2991 IFNET_RLOCK();
2992 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2993 int addrs;
2994
2995 /*
2996 * Zero the ifr_name buffer to make sure we don't
2997 * disclose the contents of the stack.
2998 */
2999 memset(ifr.ifr_name, 0, sizeof(ifr.ifr_name));
3000
3001 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name))
3002 >= sizeof(ifr.ifr_name)) {
3003 sbuf_delete(sb);
3004 IFNET_RUNLOCK();
3005 return (ENAMETOOLONG);
3006 }
3007
3008 addrs = 0;
3009 IF_ADDR_RLOCK(ifp);
3010 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
3011 struct sockaddr *sa = ifa->ifa_addr;
3012
3013 if (prison_if(curthread->td_ucred, sa) != 0)
3014 continue;
3015 addrs++;
3016 /* COMPAT_SVR4 */
3017 if (cmd == OSIOCGIFCONF) {
3018 struct osockaddr *osa =
3019 (struct osockaddr *)&ifr.ifr_addr;
3020 ifr.ifr_addr = *sa;
3021 osa->sa_family = sa->sa_family;
3022 sbuf_bcat(sb, &ifr, sizeof(ifr));
3023 max_len += sizeof(ifr);
3024 } else
3025 if (sa->sa_len <= sizeof(*sa)) {
3026 ifr.ifr_addr = *sa;
3027 sbuf_bcat(sb, &ifr, sizeof(ifr));
3028 max_len += sizeof(ifr);
3029 } else {
3030 sbuf_bcat(sb, &ifr,
3031 offsetof(struct ifreq, ifr_addr));
3032 max_len += offsetof(struct ifreq, ifr_addr);
3033 sbuf_bcat(sb, sa, sa->sa_len);
3034 max_len += sa->sa_len;
3035 }
3036
3037 if (sbuf_error(sb) == 0)
3038 valid_len = sbuf_len(sb);
3039 }
3040 IF_ADDR_RUNLOCK(ifp);
3041 if (addrs == 0) {
3042 bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr));
3043 sbuf_bcat(sb, &ifr, sizeof(ifr));
3044 max_len += sizeof(ifr);
3045
3046 if (sbuf_error(sb) == 0)
3047 valid_len = sbuf_len(sb);
3048 }
3049 }
3050 IFNET_RUNLOCK();
3051
3052 /*
3053 * If we didn't allocate enough space (uncommon), try again. If
3054 * we have already allocated as much space as we are allowed,
3055 * return what we've got.
3056 */
3057 if (valid_len != max_len && !full) {
3058 sbuf_delete(sb);
3059 goto again;
3060 }
3061
3062 ifc->ifc_len = valid_len;
3063 sbuf_finish(sb);
3064 error = copyout(sbuf_data(sb), ifc->ifc_req, ifc->ifc_len);
3065 sbuf_delete(sb);
3066 return (error);
3067 }
3068
3069 /*
3070 * Just like ifpromisc(), but for all-multicast-reception mode.
3071 */
3072 int
3073 if_allmulti(struct ifnet *ifp, int onswitch)
3074 {
3075
3076 return (if_setflag(ifp, IFF_ALLMULTI, 0, &ifp->if_amcount, onswitch));
3077 }
3078
3079 struct ifmultiaddr *
3080 if_findmulti(struct ifnet *ifp, const struct sockaddr *sa)
3081 {
3082 struct ifmultiaddr *ifma;
3083
3084 IF_ADDR_LOCK_ASSERT(ifp);
3085
3086 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
3087 if (sa->sa_family == AF_LINK) {
3088 if (sa_dl_equal(ifma->ifma_addr, sa))
3089 break;
3090 } else {
3091 if (sa_equal(ifma->ifma_addr, sa))
3092 break;
3093 }
3094 }
3095
3096 return ifma;
3097 }
3098
3099 /*
3100 * Allocate a new ifmultiaddr and initialize based on passed arguments. We
3101 * make copies of passed sockaddrs. The ifmultiaddr will not be added to
3102 * the ifnet multicast address list here, so the caller must do that and
3103 * other setup work (such as notifying the device driver). The reference
3104 * count is initialized to 1.
3105 */
3106 static struct ifmultiaddr *
3107 if_allocmulti(struct ifnet *ifp, struct sockaddr *sa, struct sockaddr *llsa,
3108 int mflags)
3109 {
3110 struct ifmultiaddr *ifma;
3111 struct sockaddr *dupsa;
3112
3113 ifma = malloc(sizeof *ifma, M_IFMADDR, mflags |
3114 M_ZERO);
3115 if (ifma == NULL)
3116 return (NULL);
3117
3118 dupsa = malloc(sa->sa_len, M_IFMADDR, mflags);
3119 if (dupsa == NULL) {
3120 free(ifma, M_IFMADDR);
3121 return (NULL);
3122 }
3123 bcopy(sa, dupsa, sa->sa_len);
3124 ifma->ifma_addr = dupsa;
3125
3126 ifma->ifma_ifp = ifp;
3127 ifma->ifma_refcount = 1;
3128 ifma->ifma_protospec = NULL;
3129
3130 if (llsa == NULL) {
3131 ifma->ifma_lladdr = NULL;
3132 return (ifma);
3133 }
3134
3135 dupsa = malloc(llsa->sa_len, M_IFMADDR, mflags);
3136 if (dupsa == NULL) {
3137 free(ifma->ifma_addr, M_IFMADDR);
3138 free(ifma, M_IFMADDR);
3139 return (NULL);
3140 }
3141 bcopy(llsa, dupsa, llsa->sa_len);
3142 ifma->ifma_lladdr = dupsa;
3143
3144 return (ifma);
3145 }
3146
3147 /*
3148 * if_freemulti: free ifmultiaddr structure and possibly attached related
3149 * addresses. The caller is responsible for implementing reference
3150 * counting, notifying the driver, handling routing messages, and releasing
3151 * any dependent link layer state.
3152 */
3153 static void
3154 if_freemulti(struct ifmultiaddr *ifma)
3155 {
3156
3157 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti: refcount %d",
3158 ifma->ifma_refcount));
3159
3160 if (ifma->ifma_lladdr != NULL)
3161 free(ifma->ifma_lladdr, M_IFMADDR);
3162 free(ifma->ifma_addr, M_IFMADDR);
3163 free(ifma, M_IFMADDR);
3164 }
3165
3166 /*
3167 * Register an additional multicast address with a network interface.
3168 *
3169 * - If the address is already present, bump the reference count on the
3170 * address and return.
3171 * - If the address is not link-layer, look up a link layer address.
3172 * - Allocate address structures for one or both addresses, and attach to the
3173 * multicast address list on the interface. If automatically adding a link
3174 * layer address, the protocol address will own a reference to the link
3175 * layer address, to be freed when it is freed.
3176 * - Notify the network device driver of an addition to the multicast address
3177 * list.
3178 *
3179 * 'sa' points to caller-owned memory with the desired multicast address.
3180 *
3181 * 'retifma' will be used to return a pointer to the resulting multicast
3182 * address reference, if desired.
3183 */
3184 int
3185 if_addmulti(struct ifnet *ifp, struct sockaddr *sa,
3186 struct ifmultiaddr **retifma)
3187 {
3188 struct ifmultiaddr *ifma, *ll_ifma;
3189 struct sockaddr *llsa;
3190 struct sockaddr_dl sdl;
3191 int error;
3192
3193 /*
3194 * If the address is already present, return a new reference to it;
3195 * otherwise, allocate storage and set up a new address.
3196 */
3197 IF_ADDR_WLOCK(ifp);
3198 ifma = if_findmulti(ifp, sa);
3199 if (ifma != NULL) {
3200 ifma->ifma_refcount++;
3201 if (retifma != NULL)
3202 *retifma = ifma;
3203 IF_ADDR_WUNLOCK(ifp);
3204 return (0);
3205 }
3206
3207 /*
3208 * The address isn't already present; resolve the protocol address
3209 * into a link layer address, and then look that up, bump its
3210 * refcount or allocate an ifma for that also.
3211 * Most link layer resolving functions returns address data which
3212 * fits inside default sockaddr_dl structure. However callback
3213 * can allocate another sockaddr structure, in that case we need to
3214 * free it later.
3215 */
3216 llsa = NULL;
3217 ll_ifma = NULL;
3218 if (ifp->if_resolvemulti != NULL) {
3219 /* Provide called function with buffer size information */
3220 sdl.sdl_len = sizeof(sdl);
3221 llsa = (struct sockaddr *)&sdl;
3222 error = ifp->if_resolvemulti(ifp, &llsa, sa);
3223 if (error)
3224 goto unlock_out;
3225 }
3226
3227 /*
3228 * Allocate the new address. Don't hook it up yet, as we may also
3229 * need to allocate a link layer multicast address.
3230 */
3231 ifma = if_allocmulti(ifp, sa, llsa, M_NOWAIT);
3232 if (ifma == NULL) {
3233 error = ENOMEM;
3234 goto free_llsa_out;
3235 }
3236
3237 /*
3238 * If a link layer address is found, we'll need to see if it's
3239 * already present in the address list, or allocate is as well.
3240 * When this block finishes, the link layer address will be on the
3241 * list.
3242 */
3243 if (llsa != NULL) {
3244 ll_ifma = if_findmulti(ifp, llsa);
3245 if (ll_ifma == NULL) {
3246 ll_ifma = if_allocmulti(ifp, llsa, NULL, M_NOWAIT);
3247 if (ll_ifma == NULL) {
3248 --ifma->ifma_refcount;
3249 if_freemulti(ifma);
3250 error = ENOMEM;
3251 goto free_llsa_out;
3252 }
3253 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ll_ifma,
3254 ifma_link);
3255 } else
3256 ll_ifma->ifma_refcount++;
3257 ifma->ifma_llifma = ll_ifma;
3258 }
3259
3260 /*
3261 * We now have a new multicast address, ifma, and possibly a new or
3262 * referenced link layer address. Add the primary address to the
3263 * ifnet address list.
3264 */
3265 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
3266
3267 if (retifma != NULL)
3268 *retifma = ifma;
3269
3270 /*
3271 * Must generate the message while holding the lock so that 'ifma'
3272 * pointer is still valid.
3273 */
3274 rt_newmaddrmsg(RTM_NEWMADDR, ifma);
3275 IF_ADDR_WUNLOCK(ifp);
3276
3277 /*
3278 * We are certain we have added something, so call down to the
3279 * interface to let them know about it.
3280 */
3281 if (ifp->if_ioctl != NULL) {
3282 (void) (*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0);
3283 }
3284
3285 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl))
3286 link_free_sdl(llsa);
3287
3288 return (0);
3289
3290 free_llsa_out:
3291 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl))
3292 link_free_sdl(llsa);
3293
3294 unlock_out:
3295 IF_ADDR_WUNLOCK(ifp);
3296 return (error);
3297 }
3298
3299 /*
3300 * Delete a multicast group membership by network-layer group address.
3301 *
3302 * Returns ENOENT if the entry could not be found. If ifp no longer
3303 * exists, results are undefined. This entry point should only be used
3304 * from subsystems which do appropriate locking to hold ifp for the
3305 * duration of the call.
3306 * Network-layer protocol domains must use if_delmulti_ifma().
3307 */
3308 int
3309 if_delmulti(struct ifnet *ifp, struct sockaddr *sa)
3310 {
3311 struct ifmultiaddr *ifma;
3312 int lastref;
3313 #ifdef INVARIANTS
3314 struct ifnet *oifp;
3315
3316 IFNET_RLOCK_NOSLEEP();
3317 TAILQ_FOREACH(oifp, &V_ifnet, if_link)
3318 if (ifp == oifp)
3319 break;
3320 if (ifp != oifp)
3321 ifp = NULL;
3322 IFNET_RUNLOCK_NOSLEEP();
3323
3324 KASSERT(ifp != NULL, ("%s: ifnet went away", __func__));
3325 #endif
3326 if (ifp == NULL)
3327 return (ENOENT);
3328
3329 IF_ADDR_WLOCK(ifp);
3330 lastref = 0;
3331 ifma = if_findmulti(ifp, sa);
3332 if (ifma != NULL)
3333 lastref = if_delmulti_locked(ifp, ifma, 0);
3334 IF_ADDR_WUNLOCK(ifp);
3335
3336 if (ifma == NULL)
3337 return (ENOENT);
3338
3339 if (lastref && ifp->if_ioctl != NULL) {
3340 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
3341 }
3342
3343 return (0);
3344 }
3345
3346 /*
3347 * Delete all multicast group membership for an interface.
3348 * Should be used to quickly flush all multicast filters.
3349 */
3350 void
3351 if_delallmulti(struct ifnet *ifp)
3352 {
3353 struct ifmultiaddr *ifma;
3354 struct ifmultiaddr *next;
3355
3356 IF_ADDR_WLOCK(ifp);
3357 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next)
3358 if_delmulti_locked(ifp, ifma, 0);
3359 IF_ADDR_WUNLOCK(ifp);
3360 }
3361
3362 /*
3363 * Delete a multicast group membership by group membership pointer.
3364 * Network-layer protocol domains must use this routine.
3365 *
3366 * It is safe to call this routine if the ifp disappeared.
3367 */
3368 void
3369 if_delmulti_ifma(struct ifmultiaddr *ifma)
3370 {
3371 struct ifnet *ifp;
3372 int lastref;
3373
3374 ifp = ifma->ifma_ifp;
3375 #ifdef DIAGNOSTIC
3376 if (ifp == NULL) {
3377 printf("%s: ifma_ifp seems to be detached\n", __func__);
3378 } else {
3379 struct ifnet *oifp;
3380
3381 IFNET_RLOCK_NOSLEEP();
3382 TAILQ_FOREACH(oifp, &V_ifnet, if_link)
3383 if (ifp == oifp)
3384 break;
3385 if (ifp != oifp) {
3386 printf("%s: ifnet %p disappeared\n", __func__, ifp);
3387 ifp = NULL;
3388 }
3389 IFNET_RUNLOCK_NOSLEEP();
3390 }
3391 #endif
3392 /*
3393 * If and only if the ifnet instance exists: Acquire the address lock.
3394 */
3395 if (ifp != NULL)
3396 IF_ADDR_WLOCK(ifp);
3397
3398 lastref = if_delmulti_locked(ifp, ifma, 0);
3399
3400 if (ifp != NULL) {
3401 /*
3402 * If and only if the ifnet instance exists:
3403 * Release the address lock.
3404 * If the group was left: update the hardware hash filter.
3405 */
3406 IF_ADDR_WUNLOCK(ifp);
3407 if (lastref && ifp->if_ioctl != NULL) {
3408 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
3409 }
3410 }
3411 }
3412
3413 /*
3414 * Perform deletion of network-layer and/or link-layer multicast address.
3415 *
3416 * Return 0 if the reference count was decremented.
3417 * Return 1 if the final reference was released, indicating that the
3418 * hardware hash filter should be reprogrammed.
3419 */
3420 static int
3421 if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching)
3422 {
3423 struct ifmultiaddr *ll_ifma;
3424
3425 if (ifp != NULL && ifma->ifma_ifp != NULL) {
3426 KASSERT(ifma->ifma_ifp == ifp,
3427 ("%s: inconsistent ifp %p", __func__, ifp));
3428 IF_ADDR_WLOCK_ASSERT(ifp);
3429 }
3430
3431 ifp = ifma->ifma_ifp;
3432
3433 /*
3434 * If the ifnet is detaching, null out references to ifnet,
3435 * so that upper protocol layers will notice, and not attempt
3436 * to obtain locks for an ifnet which no longer exists. The
3437 * routing socket announcement must happen before the ifnet
3438 * instance is detached from the system.
3439 */
3440 if (detaching) {
3441 #ifdef DIAGNOSTIC
3442 printf("%s: detaching ifnet instance %p\n", __func__, ifp);
3443 #endif
3444 /*
3445 * ifp may already be nulled out if we are being reentered
3446 * to delete the ll_ifma.
3447 */
3448 if (ifp != NULL) {
3449 rt_newmaddrmsg(RTM_DELMADDR, ifma);
3450 ifma->ifma_ifp = NULL;
3451 }
3452 }
3453
3454 if (--ifma->ifma_refcount > 0)
3455 return 0;
3456
3457 /*
3458 * If this ifma is a network-layer ifma, a link-layer ifma may
3459 * have been associated with it. Release it first if so.
3460 */
3461 ll_ifma = ifma->ifma_llifma;
3462 if (ll_ifma != NULL) {
3463 KASSERT(ifma->ifma_lladdr != NULL,
3464 ("%s: llifma w/o lladdr", __func__));
3465 if (detaching)
3466 ll_ifma->ifma_ifp = NULL; /* XXX */
3467 if (--ll_ifma->ifma_refcount == 0) {
3468 if (ifp != NULL) {
3469 TAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma,
3470 ifma_link);
3471 }
3472 if_freemulti(ll_ifma);
3473 }
3474 }
3475
3476 if (ifp != NULL)
3477 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link);
3478
3479 if_freemulti(ifma);
3480
3481 /*
3482 * The last reference to this instance of struct ifmultiaddr
3483 * was released; the hardware should be notified of this change.
3484 */
3485 return 1;
3486 }
3487
3488 /*
3489 * Set the link layer address on an interface.
3490 *
3491 * At this time we only support certain types of interfaces,
3492 * and we don't allow the length of the address to change.
3493 *
3494 * Set noinline to be dtrace-friendly
3495 */
3496 __noinline int
3497 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len)
3498 {
3499 struct sockaddr_dl *sdl;
3500 struct ifaddr *ifa;
3501 struct ifreq ifr;
3502
3503 IF_ADDR_RLOCK(ifp);
3504 ifa = ifp->if_addr;
3505 if (ifa == NULL) {
3506 IF_ADDR_RUNLOCK(ifp);
3507 return (EINVAL);
3508 }
3509 ifa_ref(ifa);
3510 IF_ADDR_RUNLOCK(ifp);
3511 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
3512 if (sdl == NULL) {
3513 ifa_free(ifa);
3514 return (EINVAL);
3515 }
3516 if (len != sdl->sdl_alen) { /* don't allow length to change */
3517 ifa_free(ifa);
3518 return (EINVAL);
3519 }
3520 switch (ifp->if_type) {
3521 case IFT_ETHER:
3522 case IFT_FDDI:
3523 case IFT_XETHER:
3524 case IFT_ISO88025:
3525 case IFT_L2VLAN:
3526 case IFT_BRIDGE:
3527 case IFT_ARCNET:
3528 case IFT_IEEE8023ADLAG:
3529 case IFT_IEEE80211:
3530 bcopy(lladdr, LLADDR(sdl), len);
3531 ifa_free(ifa);
3532 break;
3533 default:
3534 ifa_free(ifa);
3535 return (ENODEV);
3536 }
3537
3538 /*
3539 * If the interface is already up, we need
3540 * to re-init it in order to reprogram its
3541 * address filter.
3542 */
3543 if ((ifp->if_flags & IFF_UP) != 0) {
3544 if (ifp->if_ioctl) {
3545 ifp->if_flags &= ~IFF_UP;
3546 ifr.ifr_flags = ifp->if_flags & 0xffff;
3547 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3548 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3549 ifp->if_flags |= IFF_UP;
3550 ifr.ifr_flags = ifp->if_flags & 0xffff;
3551 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3552 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3553 }
3554 }
3555 EVENTHANDLER_INVOKE(iflladdr_event, ifp);
3556 return (0);
3557 }
3558
3559 /*
3560 * Compat function for handling basic encapsulation requests.
3561 * Not converted stacks (FDDI, IB, ..) supports traditional
3562 * output model: ARP (and other similar L2 protocols) are handled
3563 * inside output routine, arpresolve/nd6_resolve() returns MAC
3564 * address instead of full prepend.
3565 *
3566 * This function creates calculated header==MAC for IPv4/IPv6 and
3567 * returns EAFNOSUPPORT (which is then handled in ARP code) for other
3568 * address families.
3569 */
3570 static int
3571 if_requestencap_default(struct ifnet *ifp, struct if_encap_req *req)
3572 {
3573
3574 if (req->rtype != IFENCAP_LL)
3575 return (EOPNOTSUPP);
3576
3577 if (req->bufsize < req->lladdr_len)
3578 return (ENOMEM);
3579
3580 switch (req->family) {
3581 case AF_INET:
3582 case AF_INET6:
3583 break;
3584 default:
3585 return (EAFNOSUPPORT);
3586 }
3587
3588 /* Copy lladdr to storage as is */
3589 memmove(req->buf, req->lladdr, req->lladdr_len);
3590 req->bufsize = req->lladdr_len;
3591 req->lladdr_off = 0;
3592
3593 return (0);
3594 }
3595
3596 /*
3597 * The name argument must be a pointer to storage which will last as
3598 * long as the interface does. For physical devices, the result of
3599 * device_get_name(dev) is a good choice and for pseudo-devices a
3600 * static string works well.
3601 */
3602 void
3603 if_initname(struct ifnet *ifp, const char *name, int unit)
3604 {
3605 ifp->if_dname = name;
3606 ifp->if_dunit = unit;
3607 if (unit != IF_DUNIT_NONE)
3608 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit);
3609 else
3610 strlcpy(ifp->if_xname, name, IFNAMSIZ);
3611 }
3612
3613 int
3614 if_printf(struct ifnet *ifp, const char * fmt, ...)
3615 {
3616 va_list ap;
3617 int retval;
3618
3619 retval = printf("%s: ", ifp->if_xname);
3620 va_start(ap, fmt);
3621 retval += vprintf(fmt, ap);
3622 va_end(ap);
3623 return (retval);
3624 }
3625
3626 void
3627 if_start(struct ifnet *ifp)
3628 {
3629
3630 (*(ifp)->if_start)(ifp);
3631 }
3632
3633 /*
3634 * Backwards compatibility interface for drivers
3635 * that have not implemented it
3636 */
3637 static int
3638 if_transmit(struct ifnet *ifp, struct mbuf *m)
3639 {
3640 int error;
3641
3642 IFQ_HANDOFF(ifp, m, error);
3643 return (error);
3644 }
3645
3646 static void
3647 if_input_default(struct ifnet *ifp __unused, struct mbuf *m)
3648 {
3649
3650 m_freem(m);
3651 }
3652
3653 int
3654 if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust)
3655 {
3656 int active = 0;
3657
3658 IF_LOCK(ifq);
3659 if (_IF_QFULL(ifq)) {
3660 IF_UNLOCK(ifq);
3661 if_inc_counter(ifp, IFCOUNTER_OQDROPS, 1);
3662 m_freem(m);
3663 return (0);
3664 }
3665 if (ifp != NULL) {
3666 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len + adjust);
3667 if (m->m_flags & (M_BCAST|M_MCAST))
3668 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1);
3669 active = ifp->if_drv_flags & IFF_DRV_OACTIVE;
3670 }
3671 _IF_ENQUEUE(ifq, m);
3672 IF_UNLOCK(ifq);
3673 if (ifp != NULL && !active)
3674 (*(ifp)->if_start)(ifp);
3675 return (1);
3676 }
3677
3678 void
3679 if_register_com_alloc(u_char type,
3680 if_com_alloc_t *a, if_com_free_t *f)
3681 {
3682
3683 KASSERT(if_com_alloc[type] == NULL,
3684 ("if_register_com_alloc: %d already registered", type));
3685 KASSERT(if_com_free[type] == NULL,
3686 ("if_register_com_alloc: %d free already registered", type));
3687
3688 if_com_alloc[type] = a;
3689 if_com_free[type] = f;
3690 }
3691
3692 void
3693 if_deregister_com_alloc(u_char type)
3694 {
3695
3696 KASSERT(if_com_alloc[type] != NULL,
3697 ("if_deregister_com_alloc: %d not registered", type));
3698 KASSERT(if_com_free[type] != NULL,
3699 ("if_deregister_com_alloc: %d free not registered", type));
3700 if_com_alloc[type] = NULL;
3701 if_com_free[type] = NULL;
3702 }
3703
3704 /* API for driver access to network stack owned ifnet.*/
3705 uint64_t
3706 if_setbaudrate(struct ifnet *ifp, uint64_t baudrate)
3707 {
3708 uint64_t oldbrate;
3709
3710 oldbrate = ifp->if_baudrate;
3711 ifp->if_baudrate = baudrate;
3712 return (oldbrate);
3713 }
3714
3715 uint64_t
3716 if_getbaudrate(if_t ifp)
3717 {
3718
3719 return (((struct ifnet *)ifp)->if_baudrate);
3720 }
3721
3722 int
3723 if_setcapabilities(if_t ifp, int capabilities)
3724 {
3725 ((struct ifnet *)ifp)->if_capabilities = capabilities;
3726 return (0);
3727 }
3728
3729 int
3730 if_setcapabilitiesbit(if_t ifp, int setbit, int clearbit)
3731 {
3732 ((struct ifnet *)ifp)->if_capabilities |= setbit;
3733 ((struct ifnet *)ifp)->if_capabilities &= ~clearbit;
3734
3735 return (0);
3736 }
3737
3738 int
3739 if_getcapabilities(if_t ifp)
3740 {
3741 return ((struct ifnet *)ifp)->if_capabilities;
3742 }
3743
3744 int
3745 if_setcapenable(if_t ifp, int capabilities)
3746 {
3747 ((struct ifnet *)ifp)->if_capenable = capabilities;
3748 return (0);
3749 }
3750
3751 int
3752 if_setcapenablebit(if_t ifp, int setcap, int clearcap)
3753 {
3754 if(setcap)
3755 ((struct ifnet *)ifp)->if_capenable |= setcap;
3756 if(clearcap)
3757 ((struct ifnet *)ifp)->if_capenable &= ~clearcap;
3758
3759 return (0);
3760 }
3761
3762 const char *
3763 if_getdname(if_t ifp)
3764 {
3765 return ((struct ifnet *)ifp)->if_dname;
3766 }
3767
3768 int
3769 if_togglecapenable(if_t ifp, int togglecap)
3770 {
3771 ((struct ifnet *)ifp)->if_capenable ^= togglecap;
3772 return (0);
3773 }
3774
3775 int
3776 if_getcapenable(if_t ifp)
3777 {
3778 return ((struct ifnet *)ifp)->if_capenable;
3779 }
3780
3781 /*
3782 * This is largely undesirable because it ties ifnet to a device, but does
3783 * provide flexiblity for an embedded product vendor. Should be used with
3784 * the understanding that it violates the interface boundaries, and should be
3785 * a last resort only.
3786 */
3787 int
3788 if_setdev(if_t ifp, void *dev)
3789 {
3790 return (0);
3791 }
3792
3793 int
3794 if_setdrvflagbits(if_t ifp, int set_flags, int clear_flags)
3795 {
3796 ((struct ifnet *)ifp)->if_drv_flags |= set_flags;
3797 ((struct ifnet *)ifp)->if_drv_flags &= ~clear_flags;
3798
3799 return (0);
3800 }
3801
3802 int
3803 if_getdrvflags(if_t ifp)
3804 {
3805 return ((struct ifnet *)ifp)->if_drv_flags;
3806 }
3807
3808 int
3809 if_setdrvflags(if_t ifp, int flags)
3810 {
3811 ((struct ifnet *)ifp)->if_drv_flags = flags;
3812 return (0);
3813 }
3814
3815
3816 int
3817 if_setflags(if_t ifp, int flags)
3818 {
3819 ((struct ifnet *)ifp)->if_flags = flags;
3820 return (0);
3821 }
3822
3823 int
3824 if_setflagbits(if_t ifp, int set, int clear)
3825 {
3826 ((struct ifnet *)ifp)->if_flags |= set;
3827 ((struct ifnet *)ifp)->if_flags &= ~clear;
3828
3829 return (0);
3830 }
3831
3832 int
3833 if_getflags(if_t ifp)
3834 {
3835 return ((struct ifnet *)ifp)->if_flags;
3836 }
3837
3838 int
3839 if_clearhwassist(if_t ifp)
3840 {
3841 ((struct ifnet *)ifp)->if_hwassist = 0;
3842 return (0);
3843 }
3844
3845 int
3846 if_sethwassistbits(if_t ifp, int toset, int toclear)
3847 {
3848 ((struct ifnet *)ifp)->if_hwassist |= toset;
3849 ((struct ifnet *)ifp)->if_hwassist &= ~toclear;
3850
3851 return (0);
3852 }
3853
3854 int
3855 if_sethwassist(if_t ifp, int hwassist_bit)
3856 {
3857 ((struct ifnet *)ifp)->if_hwassist = hwassist_bit;
3858 return (0);
3859 }
3860
3861 int
3862 if_gethwassist(if_t ifp)
3863 {
3864 return ((struct ifnet *)ifp)->if_hwassist;
3865 }
3866
3867 int
3868 if_setmtu(if_t ifp, int mtu)
3869 {
3870 ((struct ifnet *)ifp)->if_mtu = mtu;
3871 return (0);
3872 }
3873
3874 int
3875 if_getmtu(if_t ifp)
3876 {
3877 return ((struct ifnet *)ifp)->if_mtu;
3878 }
3879
3880 int
3881 if_getmtu_family(if_t ifp, int family)
3882 {
3883 struct domain *dp;
3884
3885 for (dp = domains; dp; dp = dp->dom_next) {
3886 if (dp->dom_family == family && dp->dom_ifmtu != NULL)
3887 return (dp->dom_ifmtu((struct ifnet *)ifp));
3888 }
3889
3890 return (((struct ifnet *)ifp)->if_mtu);
3891 }
3892
3893 int
3894 if_setsoftc(if_t ifp, void *softc)
3895 {
3896 ((struct ifnet *)ifp)->if_softc = softc;
3897 return (0);
3898 }
3899
3900 void *
3901 if_getsoftc(if_t ifp)
3902 {
3903 return ((struct ifnet *)ifp)->if_softc;
3904 }
3905
3906 void
3907 if_setrcvif(struct mbuf *m, if_t ifp)
3908 {
3909 m->m_pkthdr.rcvif = (struct ifnet *)ifp;
3910 }
3911
3912 void
3913 if_setvtag(struct mbuf *m, uint16_t tag)
3914 {
3915 m->m_pkthdr.ether_vtag = tag;
3916 }
3917
3918 uint16_t
3919 if_getvtag(struct mbuf *m)
3920 {
3921
3922 return (m->m_pkthdr.ether_vtag);
3923 }
3924
3925 int
3926 if_sendq_empty(if_t ifp)
3927 {
3928 return IFQ_DRV_IS_EMPTY(&((struct ifnet *)ifp)->if_snd);
3929 }
3930
3931 struct ifaddr *
3932 if_getifaddr(if_t ifp)
3933 {
3934 return ((struct ifnet *)ifp)->if_addr;
3935 }
3936
3937 int
3938 if_getamcount(if_t ifp)
3939 {
3940 return ((struct ifnet *)ifp)->if_amcount;
3941 }
3942
3943
3944 int
3945 if_setsendqready(if_t ifp)
3946 {
3947 IFQ_SET_READY(&((struct ifnet *)ifp)->if_snd);
3948 return (0);
3949 }
3950
3951 int
3952 if_setsendqlen(if_t ifp, int tx_desc_count)
3953 {
3954 IFQ_SET_MAXLEN(&((struct ifnet *)ifp)->if_snd, tx_desc_count);
3955 ((struct ifnet *)ifp)->if_snd.ifq_drv_maxlen = tx_desc_count;
3956
3957 return (0);
3958 }
3959
3960 int
3961 if_vlantrunkinuse(if_t ifp)
3962 {
3963 return ((struct ifnet *)ifp)->if_vlantrunk != NULL?1:0;
3964 }
3965
3966 int
3967 if_input(if_t ifp, struct mbuf* sendmp)
3968 {
3969 (*((struct ifnet *)ifp)->if_input)((struct ifnet *)ifp, sendmp);
3970 return (0);
3971
3972 }
3973
3974 /* XXX */
3975 #ifndef ETH_ADDR_LEN
3976 #define ETH_ADDR_LEN 6
3977 #endif
3978
3979 int
3980 if_setupmultiaddr(if_t ifp, void *mta, int *cnt, int max)
3981 {
3982 struct ifmultiaddr *ifma;
3983 uint8_t *lmta = (uint8_t *)mta;
3984 int mcnt = 0;
3985
3986 TAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) {
3987 if (ifma->ifma_addr->sa_family != AF_LINK)
3988 continue;
3989
3990 if (mcnt == max)
3991 break;
3992
3993 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
3994 &lmta[mcnt * ETH_ADDR_LEN], ETH_ADDR_LEN);
3995 mcnt++;
3996 }
3997 *cnt = mcnt;
3998
3999 return (0);
4000 }
4001
4002 int
4003 if_multiaddr_array(if_t ifp, void *mta, int *cnt, int max)
4004 {
4005 int error;
4006
4007 if_maddr_rlock(ifp);
4008 error = if_setupmultiaddr(ifp, mta, cnt, max);
4009 if_maddr_runlock(ifp);
4010 return (error);
4011 }
4012
4013 int
4014 if_multiaddr_count(if_t ifp, int max)
4015 {
4016 struct ifmultiaddr *ifma;
4017 int count;
4018
4019 count = 0;
4020 if_maddr_rlock(ifp);
4021 TAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) {
4022 if (ifma->ifma_addr->sa_family != AF_LINK)
4023 continue;
4024 count++;
4025 if (count == max)
4026 break;
4027 }
4028 if_maddr_runlock(ifp);
4029 return (count);
4030 }
4031
4032 int
4033 if_multi_apply(struct ifnet *ifp, int (*filter)(void *, struct ifmultiaddr *, int), void *arg)
4034 {
4035 struct ifmultiaddr *ifma;
4036 int cnt = 0;
4037
4038 if_maddr_rlock(ifp);
4039 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
4040 cnt += filter(arg, ifma, cnt);
4041 if_maddr_runlock(ifp);
4042 return (cnt);
4043 }
4044
4045 struct mbuf *
4046 if_dequeue(if_t ifp)
4047 {
4048 struct mbuf *m;
4049 IFQ_DRV_DEQUEUE(&((struct ifnet *)ifp)->if_snd, m);
4050
4051 return (m);
4052 }
4053
4054 int
4055 if_sendq_prepend(if_t ifp, struct mbuf *m)
4056 {
4057 IFQ_DRV_PREPEND(&((struct ifnet *)ifp)->if_snd, m);
4058 return (0);
4059 }
4060
4061 int
4062 if_setifheaderlen(if_t ifp, int len)
4063 {
4064 ((struct ifnet *)ifp)->if_hdrlen = len;
4065 return (0);
4066 }
4067
4068 caddr_t
4069 if_getlladdr(if_t ifp)
4070 {
4071 return (IF_LLADDR((struct ifnet *)ifp));
4072 }
4073
4074 void *
4075 if_gethandle(u_char type)
4076 {
4077 return (if_alloc(type));
4078 }
4079
4080 void
4081 if_bpfmtap(if_t ifh, struct mbuf *m)
4082 {
4083 struct ifnet *ifp = (struct ifnet *)ifh;
4084
4085 BPF_MTAP(ifp, m);
4086 }
4087
4088 void
4089 if_etherbpfmtap(if_t ifh, struct mbuf *m)
4090 {
4091 struct ifnet *ifp = (struct ifnet *)ifh;
4092
4093 ETHER_BPF_MTAP(ifp, m);
4094 }
4095
4096 void
4097 if_vlancap(if_t ifh)
4098 {
4099 struct ifnet *ifp = (struct ifnet *)ifh;
4100 VLAN_CAPABILITIES(ifp);
4101 }
4102
4103 void
4104 if_setinitfn(if_t ifp, void (*init_fn)(void *))
4105 {
4106 ((struct ifnet *)ifp)->if_init = init_fn;
4107 }
4108
4109 void
4110 if_setioctlfn(if_t ifp, int (*ioctl_fn)(if_t, u_long, caddr_t))
4111 {
4112 ((struct ifnet *)ifp)->if_ioctl = (void *)ioctl_fn;
4113 }
4114
4115 void
4116 if_setstartfn(if_t ifp, void (*start_fn)(if_t))
4117 {
4118 ((struct ifnet *)ifp)->if_start = (void *)start_fn;
4119 }
4120
4121 void
4122 if_settransmitfn(if_t ifp, if_transmit_fn_t start_fn)
4123 {
4124 ((struct ifnet *)ifp)->if_transmit = start_fn;
4125 }
4126
4127 void if_setqflushfn(if_t ifp, if_qflush_fn_t flush_fn)
4128 {
4129 ((struct ifnet *)ifp)->if_qflush = flush_fn;
4130
4131 }
4132
4133 void
4134 if_setgetcounterfn(if_t ifp, if_get_counter_t fn)
4135 {
4136
4137 ifp->if_get_counter = fn;
4138 }
4139
4140 /* Revisit these - These are inline functions originally. */
4141 int
4142 drbr_inuse_drv(if_t ifh, struct buf_ring *br)
4143 {
4144 return drbr_inuse(ifh, br);
4145 }
4146
4147 struct mbuf*
4148 drbr_dequeue_drv(if_t ifh, struct buf_ring *br)
4149 {
4150 return drbr_dequeue(ifh, br);
4151 }
4152
4153 int
4154 drbr_needs_enqueue_drv(if_t ifh, struct buf_ring *br)
4155 {
4156 return drbr_needs_enqueue(ifh, br);
4157 }
4158
4159 int
4160 drbr_enqueue_drv(if_t ifh, struct buf_ring *br, struct mbuf *m)
4161 {
4162 return drbr_enqueue(ifh, br, m);
4163
4164 }
Cache object: 98f8dfacf71e094bf9fc3a050a129a14
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