FreeBSD/Linux Kernel Cross Reference
sys/net/if.c
1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 2010 Bjoern A. Zeeb <bz@FreeBSD.org>
5 * Copyright (c) 1980, 1986, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * @(#)if.c 8.5 (Berkeley) 1/9/95
33 * $FreeBSD$
34 */
35
36 #include "opt_bpf.h"
37 #include "opt_inet6.h"
38 #include "opt_inet.h"
39 #include "opt_ddb.h"
40
41 #include <sys/param.h>
42 #include <sys/capsicum.h>
43 #include <sys/conf.h>
44 #include <sys/eventhandler.h>
45 #include <sys/malloc.h>
46 #include <sys/domainset.h>
47 #include <sys/sbuf.h>
48 #include <sys/bus.h>
49 #include <sys/epoch.h>
50 #include <sys/mbuf.h>
51 #include <sys/systm.h>
52 #include <sys/priv.h>
53 #include <sys/proc.h>
54 #include <sys/socket.h>
55 #include <sys/socketvar.h>
56 #include <sys/protosw.h>
57 #include <sys/kernel.h>
58 #include <sys/lock.h>
59 #include <sys/refcount.h>
60 #include <sys/module.h>
61 #include <sys/nv.h>
62 #include <sys/rwlock.h>
63 #include <sys/sockio.h>
64 #include <sys/syslog.h>
65 #include <sys/sysctl.h>
66 #include <sys/sysent.h>
67 #include <sys/taskqueue.h>
68 #include <sys/domain.h>
69 #include <sys/jail.h>
70 #include <sys/priv.h>
71
72 #ifdef DDB
73 #include <ddb/ddb.h>
74 #endif
75
76 #include <machine/stdarg.h>
77 #include <vm/uma.h>
78
79 #include <net/bpf.h>
80 #include <net/ethernet.h>
81 #include <net/if.h>
82 #include <net/if_arp.h>
83 #include <net/if_clone.h>
84 #include <net/if_dl.h>
85 #include <net/if_types.h>
86 #include <net/if_var.h>
87 #include <net/if_media.h>
88 #include <net/if_mib.h>
89 #include <net/if_private.h>
90 #include <net/if_vlan_var.h>
91 #include <net/radix.h>
92 #include <net/route.h>
93 #include <net/route/route_ctl.h>
94 #include <net/vnet.h>
95
96 #if defined(INET) || defined(INET6)
97 #include <net/ethernet.h>
98 #include <netinet/in.h>
99 #include <netinet/in_var.h>
100 #include <netinet/ip.h>
101 #include <netinet/ip_carp.h>
102 #ifdef INET
103 #include <net/debugnet.h>
104 #include <netinet/if_ether.h>
105 #endif /* INET */
106 #ifdef INET6
107 #include <netinet6/in6_var.h>
108 #include <netinet6/in6_ifattach.h>
109 #endif /* INET6 */
110 #endif /* INET || INET6 */
111
112 #include <security/mac/mac_framework.h>
113
114 /*
115 * Consumers of struct ifreq such as tcpdump assume no pad between ifr_name
116 * and ifr_ifru when it is used in SIOCGIFCONF.
117 */
118 _Static_assert(sizeof(((struct ifreq *)0)->ifr_name) ==
119 offsetof(struct ifreq, ifr_ifru), "gap between ifr_name and ifr_ifru");
120
121 __read_mostly epoch_t net_epoch_preempt;
122 #ifdef COMPAT_FREEBSD32
123 #include <sys/mount.h>
124 #include <compat/freebsd32/freebsd32.h>
125
126 struct ifreq_buffer32 {
127 uint32_t length; /* (size_t) */
128 uint32_t buffer; /* (void *) */
129 };
130
131 /*
132 * Interface request structure used for socket
133 * ioctl's. All interface ioctl's must have parameter
134 * definitions which begin with ifr_name. The
135 * remainder may be interface specific.
136 */
137 struct ifreq32 {
138 char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */
139 union {
140 struct sockaddr ifru_addr;
141 struct sockaddr ifru_dstaddr;
142 struct sockaddr ifru_broadaddr;
143 struct ifreq_buffer32 ifru_buffer;
144 short ifru_flags[2];
145 short ifru_index;
146 int ifru_jid;
147 int ifru_metric;
148 int ifru_mtu;
149 int ifru_phys;
150 int ifru_media;
151 uint32_t ifru_data;
152 int ifru_cap[2];
153 u_int ifru_fib;
154 u_char ifru_vlan_pcp;
155 } ifr_ifru;
156 };
157 CTASSERT(sizeof(struct ifreq) == sizeof(struct ifreq32));
158 CTASSERT(__offsetof(struct ifreq, ifr_ifru) ==
159 __offsetof(struct ifreq32, ifr_ifru));
160
161 struct ifconf32 {
162 int32_t ifc_len;
163 union {
164 uint32_t ifcu_buf;
165 uint32_t ifcu_req;
166 } ifc_ifcu;
167 };
168 #define SIOCGIFCONF32 _IOWR('i', 36, struct ifconf32)
169
170 struct ifdrv32 {
171 char ifd_name[IFNAMSIZ];
172 uint32_t ifd_cmd;
173 uint32_t ifd_len;
174 uint32_t ifd_data;
175 };
176 #define SIOCSDRVSPEC32 _IOC_NEWTYPE(SIOCSDRVSPEC, struct ifdrv32)
177 #define SIOCGDRVSPEC32 _IOC_NEWTYPE(SIOCGDRVSPEC, struct ifdrv32)
178
179 struct ifgroupreq32 {
180 char ifgr_name[IFNAMSIZ];
181 u_int ifgr_len;
182 union {
183 char ifgru_group[IFNAMSIZ];
184 uint32_t ifgru_groups;
185 } ifgr_ifgru;
186 };
187 #define SIOCAIFGROUP32 _IOC_NEWTYPE(SIOCAIFGROUP, struct ifgroupreq32)
188 #define SIOCGIFGROUP32 _IOC_NEWTYPE(SIOCGIFGROUP, struct ifgroupreq32)
189 #define SIOCDIFGROUP32 _IOC_NEWTYPE(SIOCDIFGROUP, struct ifgroupreq32)
190 #define SIOCGIFGMEMB32 _IOC_NEWTYPE(SIOCGIFGMEMB, struct ifgroupreq32)
191
192 struct ifmediareq32 {
193 char ifm_name[IFNAMSIZ];
194 int ifm_current;
195 int ifm_mask;
196 int ifm_status;
197 int ifm_active;
198 int ifm_count;
199 uint32_t ifm_ulist; /* (int *) */
200 };
201 #define SIOCGIFMEDIA32 _IOC_NEWTYPE(SIOCGIFMEDIA, struct ifmediareq32)
202 #define SIOCGIFXMEDIA32 _IOC_NEWTYPE(SIOCGIFXMEDIA, struct ifmediareq32)
203 #endif /* COMPAT_FREEBSD32 */
204
205 union ifreq_union {
206 struct ifreq ifr;
207 #ifdef COMPAT_FREEBSD32
208 struct ifreq32 ifr32;
209 #endif
210 };
211
212 SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
213 "Link layers");
214 SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
215 "Generic link-management");
216
217 SYSCTL_INT(_net_link, OID_AUTO, ifqmaxlen, CTLFLAG_RDTUN,
218 &ifqmaxlen, 0, "max send queue size");
219
220 /* Log link state change events */
221 static int log_link_state_change = 1;
222
223 SYSCTL_INT(_net_link, OID_AUTO, log_link_state_change, CTLFLAG_RW,
224 &log_link_state_change, 0,
225 "log interface link state change events");
226
227 /* Log promiscuous mode change events */
228 static int log_promisc_mode_change = 1;
229
230 SYSCTL_INT(_net_link, OID_AUTO, log_promisc_mode_change, CTLFLAG_RDTUN,
231 &log_promisc_mode_change, 1,
232 "log promiscuous mode change events");
233
234 /* Interface description */
235 static unsigned int ifdescr_maxlen = 1024;
236 SYSCTL_UINT(_net, OID_AUTO, ifdescr_maxlen, CTLFLAG_RW,
237 &ifdescr_maxlen, 0,
238 "administrative maximum length for interface description");
239
240 static MALLOC_DEFINE(M_IFDESCR, "ifdescr", "ifnet descriptions");
241
242 /* global sx for non-critical path ifdescr */
243 static struct sx ifdescr_sx;
244 SX_SYSINIT(ifdescr_sx, &ifdescr_sx, "ifnet descr");
245
246 void (*ng_ether_link_state_p)(struct ifnet *ifp, int state);
247 void (*lagg_linkstate_p)(struct ifnet *ifp, int state);
248 /* These are external hooks for CARP. */
249 void (*carp_linkstate_p)(struct ifnet *ifp);
250 void (*carp_demote_adj_p)(int, char *);
251 int (*carp_master_p)(struct ifaddr *);
252 #if defined(INET) || defined(INET6)
253 int (*carp_forus_p)(struct ifnet *ifp, u_char *dhost);
254 int (*carp_output_p)(struct ifnet *ifp, struct mbuf *m,
255 const struct sockaddr *sa);
256 int (*carp_ioctl_p)(struct ifreq *, u_long, struct thread *);
257 int (*carp_attach_p)(struct ifaddr *, int);
258 void (*carp_detach_p)(struct ifaddr *, bool);
259 #endif
260 #ifdef INET
261 int (*carp_iamatch_p)(struct ifaddr *, uint8_t **);
262 #endif
263 #ifdef INET6
264 struct ifaddr *(*carp_iamatch6_p)(struct ifnet *ifp, struct in6_addr *taddr6);
265 caddr_t (*carp_macmatch6_p)(struct ifnet *ifp, struct mbuf *m,
266 const struct in6_addr *taddr);
267 #endif
268
269 struct mbuf *(*tbr_dequeue_ptr)(struct ifaltq *, int) = NULL;
270
271 /*
272 * XXX: Style; these should be sorted alphabetically, and unprototyped
273 * static functions should be prototyped. Currently they are sorted by
274 * declaration order.
275 */
276 static void if_attachdomain(void *);
277 static void if_attachdomain1(struct ifnet *);
278 static int ifconf(u_long, caddr_t);
279 static void if_input_default(struct ifnet *, struct mbuf *);
280 static int if_requestencap_default(struct ifnet *, struct if_encap_req *);
281 static void if_route(struct ifnet *, int flag, int fam);
282 static int if_setflag(struct ifnet *, int, int, int *, int);
283 static int if_transmit_default(struct ifnet *ifp, struct mbuf *m);
284 static void if_unroute(struct ifnet *, int flag, int fam);
285 static int if_delmulti_locked(struct ifnet *, struct ifmultiaddr *, int);
286 static void do_link_state_change(void *, int);
287 static int if_getgroup(struct ifgroupreq *, struct ifnet *);
288 static int if_getgroupmembers(struct ifgroupreq *);
289 static void if_delgroups(struct ifnet *);
290 static void if_attach_internal(struct ifnet *, bool);
291 static int if_detach_internal(struct ifnet *, bool);
292 static void if_siocaddmulti(void *, int);
293 static void if_link_ifnet(struct ifnet *);
294 static bool if_unlink_ifnet(struct ifnet *, bool);
295 #ifdef VIMAGE
296 static int if_vmove(struct ifnet *, struct vnet *);
297 #endif
298
299 #ifdef INET6
300 /*
301 * XXX: declare here to avoid to include many inet6 related files..
302 * should be more generalized?
303 */
304 extern void nd6_setmtu(struct ifnet *);
305 #endif
306
307 /* ipsec helper hooks */
308 VNET_DEFINE(struct hhook_head *, ipsec_hhh_in[HHOOK_IPSEC_COUNT]);
309 VNET_DEFINE(struct hhook_head *, ipsec_hhh_out[HHOOK_IPSEC_COUNT]);
310
311 int ifqmaxlen = IFQ_MAXLEN;
312 VNET_DEFINE(struct ifnethead, ifnet); /* depend on static init XXX */
313 VNET_DEFINE(struct ifgrouphead, ifg_head);
314
315 /* Table of ifnet by index. */
316 static int if_index;
317 static int if_indexlim = 8;
318 static struct ifindex_entry {
319 struct ifnet *ife_ifnet;
320 uint16_t ife_gencnt;
321 } *ifindex_table;
322
323 SYSCTL_NODE(_net_link_generic, IFMIB_SYSTEM, system,
324 CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
325 "Variables global to all interfaces");
326 static int
327 sysctl_ifcount(SYSCTL_HANDLER_ARGS)
328 {
329 int rv = 0;
330
331 IFNET_RLOCK();
332 for (int i = 1; i <= if_index; i++)
333 if (ifindex_table[i].ife_ifnet != NULL &&
334 ifindex_table[i].ife_ifnet->if_vnet == curvnet)
335 rv = i;
336 IFNET_RUNLOCK();
337
338 return (sysctl_handle_int(oidp, &rv, 0, req));
339 }
340 SYSCTL_PROC(_net_link_generic_system, IFMIB_IFCOUNT, ifcount,
341 CTLTYPE_INT | CTLFLAG_VNET | CTLFLAG_RD, NULL, 0, sysctl_ifcount, "I",
342 "Maximum known interface index");
343
344 /*
345 * The global network interface list (V_ifnet) and related state (such as
346 * if_index, if_indexlim, and ifindex_table) are protected by an sxlock.
347 * This may be acquired to stabilise the list, or we may rely on NET_EPOCH.
348 */
349 struct sx ifnet_sxlock;
350 SX_SYSINIT_FLAGS(ifnet_sx, &ifnet_sxlock, "ifnet_sx", SX_RECURSE);
351
352 struct sx ifnet_detach_sxlock;
353 SX_SYSINIT_FLAGS(ifnet_detach, &ifnet_detach_sxlock, "ifnet_detach_sx",
354 SX_RECURSE);
355
356 #ifdef VIMAGE
357 #define VNET_IS_SHUTTING_DOWN(_vnet) \
358 ((_vnet)->vnet_shutdown && (_vnet)->vnet_state < SI_SUB_VNET_DONE)
359 #endif
360
361 static if_com_alloc_t *if_com_alloc[256];
362 static if_com_free_t *if_com_free[256];
363
364 static MALLOC_DEFINE(M_IFNET, "ifnet", "interface internals");
365 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address");
366 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address");
367
368 struct ifnet *
369 ifnet_byindex(u_int idx)
370 {
371 struct ifnet *ifp;
372
373 NET_EPOCH_ASSERT();
374
375 if (__predict_false(idx > if_index))
376 return (NULL);
377
378 ifp = ck_pr_load_ptr(&ifindex_table[idx].ife_ifnet);
379
380 if (curvnet != NULL && ifp != NULL && ifp->if_vnet != curvnet)
381 ifp = NULL;
382
383 return (ifp);
384 }
385
386 struct ifnet *
387 ifnet_byindex_ref(u_int idx)
388 {
389 struct ifnet *ifp;
390
391 ifp = ifnet_byindex(idx);
392 if (ifp == NULL || (ifp->if_flags & IFF_DYING))
393 return (NULL);
394 if (!if_try_ref(ifp))
395 return (NULL);
396 return (ifp);
397 }
398
399 struct ifnet *
400 ifnet_byindexgen(uint16_t idx, uint16_t gen)
401 {
402 struct ifnet *ifp;
403
404 NET_EPOCH_ASSERT();
405
406 if (__predict_false(idx > if_index))
407 return (NULL);
408
409 ifp = ck_pr_load_ptr(&ifindex_table[idx].ife_ifnet);
410
411 if (ifindex_table[idx].ife_gencnt == gen)
412 return (ifp);
413 else
414 return (NULL);
415 }
416
417 /*
418 * Network interface utility routines.
419 *
420 * Routines with ifa_ifwith* names take sockaddr *'s as
421 * parameters.
422 */
423
424 static void
425 if_init_idxtable(void *arg __unused)
426 {
427
428 ifindex_table = malloc(if_indexlim * sizeof(*ifindex_table),
429 M_IFNET, M_WAITOK | M_ZERO);
430 }
431 SYSINIT(if_init, SI_SUB_INIT_IF, SI_ORDER_SECOND, if_init_idxtable, NULL);
432
433 static void
434 vnet_if_init(const void *unused __unused)
435 {
436
437 CK_STAILQ_INIT(&V_ifnet);
438 CK_STAILQ_INIT(&V_ifg_head);
439 vnet_if_clone_init();
440 }
441 VNET_SYSINIT(vnet_if_init, SI_SUB_INIT_IF, SI_ORDER_SECOND, vnet_if_init,
442 NULL);
443
444 static void
445 if_link_ifnet(struct ifnet *ifp)
446 {
447
448 IFNET_WLOCK();
449 CK_STAILQ_INSERT_TAIL(&V_ifnet, ifp, if_link);
450 #ifdef VIMAGE
451 curvnet->vnet_ifcnt++;
452 #endif
453 IFNET_WUNLOCK();
454 }
455
456 static bool
457 if_unlink_ifnet(struct ifnet *ifp, bool vmove)
458 {
459 struct ifnet *iter;
460 int found = 0;
461
462 IFNET_WLOCK();
463 CK_STAILQ_FOREACH(iter, &V_ifnet, if_link)
464 if (iter == ifp) {
465 CK_STAILQ_REMOVE(&V_ifnet, ifp, ifnet, if_link);
466 if (!vmove)
467 ifp->if_flags |= IFF_DYING;
468 found = 1;
469 break;
470 }
471 #ifdef VIMAGE
472 curvnet->vnet_ifcnt--;
473 #endif
474 IFNET_WUNLOCK();
475
476 return (found);
477 }
478
479 #ifdef VIMAGE
480 static void
481 vnet_if_return(const void *unused __unused)
482 {
483 struct ifnet *ifp, *nifp;
484 struct ifnet **pending;
485 int found __diagused;
486 int i;
487
488 i = 0;
489
490 /*
491 * We need to protect our access to the V_ifnet tailq. Ordinarily we'd
492 * enter NET_EPOCH, but that's not possible, because if_vmove() calls
493 * if_detach_internal(), which waits for NET_EPOCH callbacks to
494 * complete. We can't do that from within NET_EPOCH.
495 *
496 * However, we can also use the IFNET_xLOCK, which is the V_ifnet
497 * read/write lock. We cannot hold the lock as we call if_vmove()
498 * though, as that presents LOR w.r.t ifnet_sx, in_multi_sx and iflib
499 * ctx lock.
500 */
501 IFNET_WLOCK();
502
503 pending = malloc(sizeof(struct ifnet *) * curvnet->vnet_ifcnt,
504 M_IFNET, M_WAITOK | M_ZERO);
505
506 /* Return all inherited interfaces to their parent vnets. */
507 CK_STAILQ_FOREACH_SAFE(ifp, &V_ifnet, if_link, nifp) {
508 if (ifp->if_home_vnet != ifp->if_vnet) {
509 found = if_unlink_ifnet(ifp, true);
510 MPASS(found);
511
512 pending[i++] = ifp;
513 }
514 }
515 IFNET_WUNLOCK();
516
517 for (int j = 0; j < i; j++) {
518 sx_xlock(&ifnet_detach_sxlock);
519 if_vmove(pending[j], pending[j]->if_home_vnet);
520 sx_xunlock(&ifnet_detach_sxlock);
521 }
522
523 free(pending, M_IFNET);
524 }
525 VNET_SYSUNINIT(vnet_if_return, SI_SUB_VNET_DONE, SI_ORDER_ANY,
526 vnet_if_return, NULL);
527 #endif
528
529 /*
530 * Allocate a struct ifnet and an index for an interface. A layer 2
531 * common structure will also be allocated if an allocation routine is
532 * registered for the passed type.
533 */
534 static struct ifnet *
535 if_alloc_domain(u_char type, int numa_domain)
536 {
537 struct ifnet *ifp;
538 u_short idx;
539
540 KASSERT(numa_domain <= IF_NODOM, ("numa_domain too large"));
541 if (numa_domain == IF_NODOM)
542 ifp = malloc(sizeof(struct ifnet), M_IFNET,
543 M_WAITOK | M_ZERO);
544 else
545 ifp = malloc_domainset(sizeof(struct ifnet), M_IFNET,
546 DOMAINSET_PREF(numa_domain), M_WAITOK | M_ZERO);
547 ifp->if_type = type;
548 ifp->if_alloctype = type;
549 ifp->if_numa_domain = numa_domain;
550 #ifdef VIMAGE
551 ifp->if_vnet = curvnet;
552 #endif
553 if (if_com_alloc[type] != NULL) {
554 ifp->if_l2com = if_com_alloc[type](type, ifp);
555 KASSERT(ifp->if_l2com, ("%s: if_com_alloc[%u] failed", __func__,
556 type));
557 }
558
559 IF_ADDR_LOCK_INIT(ifp);
560 TASK_INIT(&ifp->if_linktask, 0, do_link_state_change, ifp);
561 TASK_INIT(&ifp->if_addmultitask, 0, if_siocaddmulti, ifp);
562 ifp->if_afdata_initialized = 0;
563 IF_AFDATA_LOCK_INIT(ifp);
564 CK_STAILQ_INIT(&ifp->if_addrhead);
565 CK_STAILQ_INIT(&ifp->if_multiaddrs);
566 CK_STAILQ_INIT(&ifp->if_groups);
567 #ifdef MAC
568 mac_ifnet_init(ifp);
569 #endif
570 ifq_init(&ifp->if_snd, ifp);
571
572 refcount_init(&ifp->if_refcount, 1); /* Index reference. */
573 for (int i = 0; i < IFCOUNTERS; i++)
574 ifp->if_counters[i] = counter_u64_alloc(M_WAITOK);
575 ifp->if_get_counter = if_get_counter_default;
576 ifp->if_pcp = IFNET_PCP_NONE;
577
578 /* Allocate an ifindex array entry. */
579 IFNET_WLOCK();
580 /*
581 * Try to find an empty slot below if_index. If we fail, take the
582 * next slot.
583 */
584 for (idx = 1; idx <= if_index; idx++) {
585 if (ifindex_table[idx].ife_ifnet == NULL)
586 break;
587 }
588
589 /* Catch if_index overflow. */
590 if (idx >= if_indexlim) {
591 struct ifindex_entry *new, *old;
592 int newlim;
593
594 newlim = if_indexlim * 2;
595 new = malloc(newlim * sizeof(*new), M_IFNET, M_WAITOK | M_ZERO);
596 memcpy(new, ifindex_table, if_indexlim * sizeof(*new));
597 old = ifindex_table;
598 ck_pr_store_ptr(&ifindex_table, new);
599 if_indexlim = newlim;
600 epoch_wait_preempt(net_epoch_preempt);
601 free(old, M_IFNET);
602 }
603 if (idx > if_index)
604 if_index = idx;
605
606 ifp->if_index = idx;
607 ifp->if_idxgen = ifindex_table[idx].ife_gencnt;
608 ck_pr_store_ptr(&ifindex_table[idx].ife_ifnet, ifp);
609 IFNET_WUNLOCK();
610
611 return (ifp);
612 }
613
614 struct ifnet *
615 if_alloc_dev(u_char type, device_t dev)
616 {
617 int numa_domain;
618
619 if (dev == NULL || bus_get_domain(dev, &numa_domain) != 0)
620 return (if_alloc_domain(type, IF_NODOM));
621 return (if_alloc_domain(type, numa_domain));
622 }
623
624 struct ifnet *
625 if_alloc(u_char type)
626 {
627
628 return (if_alloc_domain(type, IF_NODOM));
629 }
630 /*
631 * Do the actual work of freeing a struct ifnet, and layer 2 common
632 * structure. This call is made when the network epoch guarantees
633 * us that nobody holds a pointer to the interface.
634 */
635 static void
636 if_free_deferred(epoch_context_t ctx)
637 {
638 struct ifnet *ifp = __containerof(ctx, struct ifnet, if_epoch_ctx);
639
640 KASSERT((ifp->if_flags & IFF_DYING),
641 ("%s: interface not dying", __func__));
642
643 if (if_com_free[ifp->if_alloctype] != NULL)
644 if_com_free[ifp->if_alloctype](ifp->if_l2com,
645 ifp->if_alloctype);
646
647 #ifdef MAC
648 mac_ifnet_destroy(ifp);
649 #endif /* MAC */
650 IF_AFDATA_DESTROY(ifp);
651 IF_ADDR_LOCK_DESTROY(ifp);
652 ifq_delete(&ifp->if_snd);
653
654 for (int i = 0; i < IFCOUNTERS; i++)
655 counter_u64_free(ifp->if_counters[i]);
656
657 if_freedescr(ifp->if_description);
658 free(ifp->if_hw_addr, M_IFADDR);
659 free(ifp, M_IFNET);
660 }
661
662 /*
663 * Deregister an interface and free the associated storage.
664 */
665 void
666 if_free(struct ifnet *ifp)
667 {
668
669 ifp->if_flags |= IFF_DYING; /* XXX: Locking */
670
671 /*
672 * XXXGL: An interface index is really an alias to ifp pointer.
673 * Why would we clear the alias now, and not in the deferred
674 * context? Indeed there is nothing wrong with some network
675 * thread obtaining ifp via ifnet_byindex() inside the network
676 * epoch and then dereferencing ifp while we perform if_free(),
677 * and after if_free() finished, too.
678 *
679 * This early index freeing was important back when ifindex was
680 * virtualized and interface would outlive the vnet.
681 */
682 IFNET_WLOCK();
683 MPASS(ifindex_table[ifp->if_index].ife_ifnet == ifp);
684 ck_pr_store_ptr(&ifindex_table[ifp->if_index].ife_ifnet, NULL);
685 ifindex_table[ifp->if_index].ife_gencnt++;
686 while (if_index > 0 && ifindex_table[if_index].ife_ifnet == NULL)
687 if_index--;
688 IFNET_WUNLOCK();
689
690 if (refcount_release(&ifp->if_refcount))
691 NET_EPOCH_CALL(if_free_deferred, &ifp->if_epoch_ctx);
692 }
693
694 /*
695 * Interfaces to keep an ifnet type-stable despite the possibility of the
696 * driver calling if_free(). If there are additional references, we defer
697 * freeing the underlying data structure.
698 */
699 void
700 if_ref(struct ifnet *ifp)
701 {
702 u_int old __diagused;
703
704 /* We don't assert the ifnet list lock here, but arguably should. */
705 old = refcount_acquire(&ifp->if_refcount);
706 KASSERT(old > 0, ("%s: ifp %p has 0 refs", __func__, ifp));
707 }
708
709 bool
710 if_try_ref(struct ifnet *ifp)
711 {
712 NET_EPOCH_ASSERT();
713 return (refcount_acquire_if_not_zero(&ifp->if_refcount));
714 }
715
716 void
717 if_rele(struct ifnet *ifp)
718 {
719
720 if (!refcount_release(&ifp->if_refcount))
721 return;
722 NET_EPOCH_CALL(if_free_deferred, &ifp->if_epoch_ctx);
723 }
724
725 void
726 ifq_init(struct ifaltq *ifq, struct ifnet *ifp)
727 {
728
729 mtx_init(&ifq->ifq_mtx, ifp->if_xname, "if send queue", MTX_DEF);
730
731 if (ifq->ifq_maxlen == 0)
732 ifq->ifq_maxlen = ifqmaxlen;
733
734 ifq->altq_type = 0;
735 ifq->altq_disc = NULL;
736 ifq->altq_flags &= ALTQF_CANTCHANGE;
737 ifq->altq_tbr = NULL;
738 ifq->altq_ifp = ifp;
739 }
740
741 void
742 ifq_delete(struct ifaltq *ifq)
743 {
744 mtx_destroy(&ifq->ifq_mtx);
745 }
746
747 /*
748 * Perform generic interface initialization tasks and attach the interface
749 * to the list of "active" interfaces. If vmove flag is set on entry
750 * to if_attach_internal(), perform only a limited subset of initialization
751 * tasks, given that we are moving from one vnet to another an ifnet which
752 * has already been fully initialized.
753 *
754 * Note that if_detach_internal() removes group membership unconditionally
755 * even when vmove flag is set, and if_attach_internal() adds only IFG_ALL.
756 * Thus, when if_vmove() is applied to a cloned interface, group membership
757 * is lost while a cloned one always joins a group whose name is
758 * ifc->ifc_name. To recover this after if_detach_internal() and
759 * if_attach_internal(), the cloner should be specified to
760 * if_attach_internal() via ifc. If it is non-NULL, if_attach_internal()
761 * attempts to join a group whose name is ifc->ifc_name.
762 *
763 * XXX:
764 * - The decision to return void and thus require this function to
765 * succeed is questionable.
766 * - We should probably do more sanity checking. For instance we don't
767 * do anything to insure if_xname is unique or non-empty.
768 */
769 void
770 if_attach(struct ifnet *ifp)
771 {
772
773 if_attach_internal(ifp, false);
774 }
775
776 /*
777 * Compute the least common TSO limit.
778 */
779 void
780 if_hw_tsomax_common(if_t ifp, struct ifnet_hw_tsomax *pmax)
781 {
782 /*
783 * 1) If there is no limit currently, take the limit from
784 * the network adapter.
785 *
786 * 2) If the network adapter has a limit below the current
787 * limit, apply it.
788 */
789 if (pmax->tsomaxbytes == 0 || (ifp->if_hw_tsomax != 0 &&
790 ifp->if_hw_tsomax < pmax->tsomaxbytes)) {
791 pmax->tsomaxbytes = ifp->if_hw_tsomax;
792 }
793 if (pmax->tsomaxsegcount == 0 || (ifp->if_hw_tsomaxsegcount != 0 &&
794 ifp->if_hw_tsomaxsegcount < pmax->tsomaxsegcount)) {
795 pmax->tsomaxsegcount = ifp->if_hw_tsomaxsegcount;
796 }
797 if (pmax->tsomaxsegsize == 0 || (ifp->if_hw_tsomaxsegsize != 0 &&
798 ifp->if_hw_tsomaxsegsize < pmax->tsomaxsegsize)) {
799 pmax->tsomaxsegsize = ifp->if_hw_tsomaxsegsize;
800 }
801 }
802
803 /*
804 * Update TSO limit of a network adapter.
805 *
806 * Returns zero if no change. Else non-zero.
807 */
808 int
809 if_hw_tsomax_update(if_t ifp, struct ifnet_hw_tsomax *pmax)
810 {
811 int retval = 0;
812 if (ifp->if_hw_tsomax != pmax->tsomaxbytes) {
813 ifp->if_hw_tsomax = pmax->tsomaxbytes;
814 retval++;
815 }
816 if (ifp->if_hw_tsomaxsegsize != pmax->tsomaxsegsize) {
817 ifp->if_hw_tsomaxsegsize = pmax->tsomaxsegsize;
818 retval++;
819 }
820 if (ifp->if_hw_tsomaxsegcount != pmax->tsomaxsegcount) {
821 ifp->if_hw_tsomaxsegcount = pmax->tsomaxsegcount;
822 retval++;
823 }
824 return (retval);
825 }
826
827 static void
828 if_attach_internal(struct ifnet *ifp, bool vmove)
829 {
830 unsigned socksize, ifasize;
831 int namelen, masklen;
832 struct sockaddr_dl *sdl;
833 struct ifaddr *ifa;
834
835 MPASS(ifindex_table[ifp->if_index].ife_ifnet == ifp);
836
837 #ifdef VIMAGE
838 ifp->if_vnet = curvnet;
839 if (ifp->if_home_vnet == NULL)
840 ifp->if_home_vnet = curvnet;
841 #endif
842
843 if_addgroup(ifp, IFG_ALL);
844
845 #ifdef VIMAGE
846 /* Restore group membership for cloned interface. */
847 if (vmove)
848 if_clone_restoregroup(ifp);
849 #endif
850
851 getmicrotime(&ifp->if_lastchange);
852 ifp->if_epoch = time_uptime;
853
854 KASSERT((ifp->if_transmit == NULL && ifp->if_qflush == NULL) ||
855 (ifp->if_transmit != NULL && ifp->if_qflush != NULL),
856 ("transmit and qflush must both either be set or both be NULL"));
857 if (ifp->if_transmit == NULL) {
858 ifp->if_transmit = if_transmit_default;
859 ifp->if_qflush = if_qflush;
860 }
861 if (ifp->if_input == NULL)
862 ifp->if_input = if_input_default;
863
864 if (ifp->if_requestencap == NULL)
865 ifp->if_requestencap = if_requestencap_default;
866
867 if (!vmove) {
868 #ifdef MAC
869 mac_ifnet_create(ifp);
870 #endif
871
872 /*
873 * Create a Link Level name for this device.
874 */
875 namelen = strlen(ifp->if_xname);
876 /*
877 * Always save enough space for any possiable name so we
878 * can do a rename in place later.
879 */
880 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + IFNAMSIZ;
881 socksize = masklen + ifp->if_addrlen;
882 if (socksize < sizeof(*sdl))
883 socksize = sizeof(*sdl);
884 socksize = roundup2(socksize, sizeof(long));
885 ifasize = sizeof(*ifa) + 2 * socksize;
886 ifa = ifa_alloc(ifasize, M_WAITOK);
887 sdl = (struct sockaddr_dl *)(ifa + 1);
888 sdl->sdl_len = socksize;
889 sdl->sdl_family = AF_LINK;
890 bcopy(ifp->if_xname, sdl->sdl_data, namelen);
891 sdl->sdl_nlen = namelen;
892 sdl->sdl_index = ifp->if_index;
893 sdl->sdl_type = ifp->if_type;
894 ifp->if_addr = ifa;
895 ifa->ifa_ifp = ifp;
896 ifa->ifa_addr = (struct sockaddr *)sdl;
897 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
898 ifa->ifa_netmask = (struct sockaddr *)sdl;
899 sdl->sdl_len = masklen;
900 while (namelen != 0)
901 sdl->sdl_data[--namelen] = 0xff;
902 CK_STAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link);
903 /* Reliably crash if used uninitialized. */
904 ifp->if_broadcastaddr = NULL;
905
906 if (ifp->if_type == IFT_ETHER) {
907 ifp->if_hw_addr = malloc(ifp->if_addrlen, M_IFADDR,
908 M_WAITOK | M_ZERO);
909 }
910
911 #if defined(INET) || defined(INET6)
912 /* Use defaults for TSO, if nothing is set */
913 if (ifp->if_hw_tsomax == 0 &&
914 ifp->if_hw_tsomaxsegcount == 0 &&
915 ifp->if_hw_tsomaxsegsize == 0) {
916 /*
917 * The TSO defaults needs to be such that an
918 * NFS mbuf list of 35 mbufs totalling just
919 * below 64K works and that a chain of mbufs
920 * can be defragged into at most 32 segments:
921 */
922 ifp->if_hw_tsomax = min(IP_MAXPACKET, (32 * MCLBYTES) -
923 (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN));
924 ifp->if_hw_tsomaxsegcount = 35;
925 ifp->if_hw_tsomaxsegsize = 2048; /* 2K */
926
927 /* XXX some drivers set IFCAP_TSO after ethernet attach */
928 if (ifp->if_capabilities & IFCAP_TSO) {
929 if_printf(ifp, "Using defaults for TSO: %u/%u/%u\n",
930 ifp->if_hw_tsomax,
931 ifp->if_hw_tsomaxsegcount,
932 ifp->if_hw_tsomaxsegsize);
933 }
934 }
935 #endif
936 }
937 #ifdef VIMAGE
938 else {
939 /*
940 * Update the interface index in the link layer address
941 * of the interface.
942 */
943 for (ifa = ifp->if_addr; ifa != NULL;
944 ifa = CK_STAILQ_NEXT(ifa, ifa_link)) {
945 if (ifa->ifa_addr->sa_family == AF_LINK) {
946 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
947 sdl->sdl_index = ifp->if_index;
948 }
949 }
950 }
951 #endif
952
953 if_link_ifnet(ifp);
954
955 if (domain_init_status >= 2)
956 if_attachdomain1(ifp);
957
958 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
959 if (IS_DEFAULT_VNET(curvnet))
960 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL);
961 }
962
963 static void
964 if_epochalloc(void *dummy __unused)
965 {
966
967 net_epoch_preempt = epoch_alloc("Net preemptible", EPOCH_PREEMPT);
968 }
969 SYSINIT(ifepochalloc, SI_SUB_EPOCH, SI_ORDER_ANY, if_epochalloc, NULL);
970
971 static void
972 if_attachdomain(void *dummy)
973 {
974 struct ifnet *ifp;
975
976 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link)
977 if_attachdomain1(ifp);
978 }
979 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_SECOND,
980 if_attachdomain, NULL);
981
982 static void
983 if_attachdomain1(struct ifnet *ifp)
984 {
985 struct domain *dp;
986
987 /*
988 * Since dp->dom_ifattach calls malloc() with M_WAITOK, we
989 * cannot lock ifp->if_afdata initialization, entirely.
990 */
991 IF_AFDATA_LOCK(ifp);
992 if (ifp->if_afdata_initialized >= domain_init_status) {
993 IF_AFDATA_UNLOCK(ifp);
994 log(LOG_WARNING, "%s called more than once on %s\n",
995 __func__, ifp->if_xname);
996 return;
997 }
998 ifp->if_afdata_initialized = domain_init_status;
999 IF_AFDATA_UNLOCK(ifp);
1000
1001 /* address family dependent data region */
1002 bzero(ifp->if_afdata, sizeof(ifp->if_afdata));
1003 SLIST_FOREACH(dp, &domains, dom_next) {
1004 if (dp->dom_ifattach)
1005 ifp->if_afdata[dp->dom_family] =
1006 (*dp->dom_ifattach)(ifp);
1007 }
1008 }
1009
1010 /*
1011 * Remove any unicast or broadcast network addresses from an interface.
1012 */
1013 void
1014 if_purgeaddrs(struct ifnet *ifp)
1015 {
1016 struct ifaddr *ifa;
1017
1018 #ifdef INET6
1019 /*
1020 * Need to leave multicast addresses of proxy NDP llentries
1021 * before in6_purgeifaddr() because the llentries are keys
1022 * for in6_multi objects of proxy NDP entries.
1023 * in6_purgeifaddr()s clean up llentries including proxy NDPs
1024 * then we would lose the keys if they are called earlier.
1025 */
1026 in6_purge_proxy_ndp(ifp);
1027 #endif
1028 while (1) {
1029 struct epoch_tracker et;
1030
1031 NET_EPOCH_ENTER(et);
1032 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1033 if (ifa->ifa_addr->sa_family != AF_LINK)
1034 break;
1035 }
1036 NET_EPOCH_EXIT(et);
1037
1038 if (ifa == NULL)
1039 break;
1040 #ifdef INET
1041 /* XXX: Ugly!! ad hoc just for INET */
1042 if (ifa->ifa_addr->sa_family == AF_INET) {
1043 struct ifaliasreq ifr;
1044
1045 bzero(&ifr, sizeof(ifr));
1046 ifr.ifra_addr = *ifa->ifa_addr;
1047 if (ifa->ifa_dstaddr)
1048 ifr.ifra_broadaddr = *ifa->ifa_dstaddr;
1049 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp,
1050 NULL) == 0)
1051 continue;
1052 }
1053 #endif /* INET */
1054 #ifdef INET6
1055 if (ifa->ifa_addr->sa_family == AF_INET6) {
1056 in6_purgeifaddr((struct in6_ifaddr *)ifa);
1057 /* ifp_addrhead is already updated */
1058 continue;
1059 }
1060 #endif /* INET6 */
1061 IF_ADDR_WLOCK(ifp);
1062 CK_STAILQ_REMOVE(&ifp->if_addrhead, ifa, ifaddr, ifa_link);
1063 IF_ADDR_WUNLOCK(ifp);
1064 ifa_free(ifa);
1065 }
1066 }
1067
1068 /*
1069 * Remove any multicast network addresses from an interface when an ifnet
1070 * is going away.
1071 */
1072 static void
1073 if_purgemaddrs(struct ifnet *ifp)
1074 {
1075 struct ifmultiaddr *ifma;
1076
1077 IF_ADDR_WLOCK(ifp);
1078 while (!CK_STAILQ_EMPTY(&ifp->if_multiaddrs)) {
1079 ifma = CK_STAILQ_FIRST(&ifp->if_multiaddrs);
1080 CK_STAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifmultiaddr, ifma_link);
1081 if_delmulti_locked(ifp, ifma, 1);
1082 }
1083 IF_ADDR_WUNLOCK(ifp);
1084 }
1085
1086 /*
1087 * Detach an interface, removing it from the list of "active" interfaces.
1088 * If vmove flag is set on entry to if_detach_internal(), perform only a
1089 * limited subset of cleanup tasks, given that we are moving an ifnet from
1090 * one vnet to another, where it must be fully operational.
1091 *
1092 * XXXRW: There are some significant questions about event ordering, and
1093 * how to prevent things from starting to use the interface during detach.
1094 */
1095 void
1096 if_detach(struct ifnet *ifp)
1097 {
1098 bool found;
1099
1100 CURVNET_SET_QUIET(ifp->if_vnet);
1101 found = if_unlink_ifnet(ifp, false);
1102 if (found) {
1103 sx_xlock(&ifnet_detach_sxlock);
1104 if_detach_internal(ifp, false);
1105 sx_xunlock(&ifnet_detach_sxlock);
1106 }
1107 CURVNET_RESTORE();
1108 }
1109
1110 /*
1111 * The vmove flag, if set, indicates that we are called from a callpath
1112 * that is moving an interface to a different vnet instance.
1113 *
1114 * The shutdown flag, if set, indicates that we are called in the
1115 * process of shutting down a vnet instance. Currently only the
1116 * vnet_if_return SYSUNINIT function sets it. Note: we can be called
1117 * on a vnet instance shutdown without this flag being set, e.g., when
1118 * the cloned interfaces are destoyed as first thing of teardown.
1119 */
1120 static int
1121 if_detach_internal(struct ifnet *ifp, bool vmove)
1122 {
1123 struct ifaddr *ifa;
1124 int i;
1125 struct domain *dp;
1126 #ifdef VIMAGE
1127 bool shutdown;
1128
1129 shutdown = VNET_IS_SHUTTING_DOWN(ifp->if_vnet);
1130 #endif
1131
1132 /*
1133 * At this point we know the interface still was on the ifnet list
1134 * and we removed it so we are in a stable state.
1135 */
1136 epoch_wait_preempt(net_epoch_preempt);
1137
1138 /*
1139 * Ensure all pending EPOCH(9) callbacks have been executed. This
1140 * fixes issues about late destruction of multicast options
1141 * which lead to leave group calls, which in turn access the
1142 * belonging ifnet structure:
1143 */
1144 NET_EPOCH_DRAIN_CALLBACKS();
1145
1146 /*
1147 * In any case (destroy or vmove) detach us from the groups
1148 * and remove/wait for pending events on the taskq.
1149 * XXX-BZ in theory an interface could still enqueue a taskq change?
1150 */
1151 if_delgroups(ifp);
1152
1153 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
1154 taskqueue_drain(taskqueue_swi, &ifp->if_addmultitask);
1155
1156 if_down(ifp);
1157
1158 #ifdef VIMAGE
1159 /*
1160 * On VNET shutdown abort here as the stack teardown will do all
1161 * the work top-down for us.
1162 */
1163 if (shutdown) {
1164 /* Give interface users the chance to clean up. */
1165 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
1166
1167 /*
1168 * In case of a vmove we are done here without error.
1169 * If we would signal an error it would lead to the same
1170 * abort as if we did not find the ifnet anymore.
1171 * if_detach() calls us in void context and does not care
1172 * about an early abort notification, so life is splendid :)
1173 */
1174 goto finish_vnet_shutdown;
1175 }
1176 #endif
1177
1178 /*
1179 * At this point we are not tearing down a VNET and are either
1180 * going to destroy or vmove the interface and have to cleanup
1181 * accordingly.
1182 */
1183
1184 /*
1185 * Remove routes and flush queues.
1186 */
1187 #ifdef ALTQ
1188 if (ALTQ_IS_ENABLED(&ifp->if_snd))
1189 altq_disable(&ifp->if_snd);
1190 if (ALTQ_IS_ATTACHED(&ifp->if_snd))
1191 altq_detach(&ifp->if_snd);
1192 #endif
1193
1194 if_purgeaddrs(ifp);
1195
1196 #ifdef INET
1197 in_ifdetach(ifp);
1198 #endif
1199
1200 #ifdef INET6
1201 /*
1202 * Remove all IPv6 kernel structs related to ifp. This should be done
1203 * before removing routing entries below, since IPv6 interface direct
1204 * routes are expected to be removed by the IPv6-specific kernel API.
1205 * Otherwise, the kernel will detect some inconsistency and bark it.
1206 */
1207 in6_ifdetach(ifp);
1208 #endif
1209 if_purgemaddrs(ifp);
1210
1211 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
1212 if (IS_DEFAULT_VNET(curvnet))
1213 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL);
1214
1215 if (!vmove) {
1216 /*
1217 * Prevent further calls into the device driver via ifnet.
1218 */
1219 if_dead(ifp);
1220
1221 /*
1222 * Clean up all addresses.
1223 */
1224 IF_ADDR_WLOCK(ifp);
1225 if (!CK_STAILQ_EMPTY(&ifp->if_addrhead)) {
1226 ifa = CK_STAILQ_FIRST(&ifp->if_addrhead);
1227 CK_STAILQ_REMOVE(&ifp->if_addrhead, ifa, ifaddr, ifa_link);
1228 IF_ADDR_WUNLOCK(ifp);
1229 ifa_free(ifa);
1230 } else
1231 IF_ADDR_WUNLOCK(ifp);
1232 }
1233
1234 rt_flushifroutes(ifp);
1235
1236 #ifdef VIMAGE
1237 finish_vnet_shutdown:
1238 #endif
1239 /*
1240 * We cannot hold the lock over dom_ifdetach calls as they might
1241 * sleep, for example trying to drain a callout, thus open up the
1242 * theoretical race with re-attaching.
1243 */
1244 IF_AFDATA_LOCK(ifp);
1245 i = ifp->if_afdata_initialized;
1246 ifp->if_afdata_initialized = 0;
1247 IF_AFDATA_UNLOCK(ifp);
1248 if (i == 0)
1249 return (0);
1250 SLIST_FOREACH(dp, &domains, dom_next) {
1251 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) {
1252 (*dp->dom_ifdetach)(ifp,
1253 ifp->if_afdata[dp->dom_family]);
1254 ifp->if_afdata[dp->dom_family] = NULL;
1255 }
1256 }
1257
1258 return (0);
1259 }
1260
1261 #ifdef VIMAGE
1262 /*
1263 * if_vmove() performs a limited version of if_detach() in current
1264 * vnet and if_attach()es the ifnet to the vnet specified as 2nd arg.
1265 */
1266 static int
1267 if_vmove(struct ifnet *ifp, struct vnet *new_vnet)
1268 {
1269 #ifdef DEV_BPF
1270 u_int bif_dlt, bif_hdrlen;
1271 #endif
1272 int rc;
1273
1274 #ifdef DEV_BPF
1275 /*
1276 * if_detach_internal() will call the eventhandler to notify
1277 * interface departure. That will detach if_bpf. We need to
1278 * safe the dlt and hdrlen so we can re-attach it later.
1279 */
1280 bpf_get_bp_params(ifp->if_bpf, &bif_dlt, &bif_hdrlen);
1281 #endif
1282
1283 /*
1284 * Detach from current vnet, but preserve LLADDR info, do not
1285 * mark as dead etc. so that the ifnet can be reattached later.
1286 * If we cannot find it, we lost the race to someone else.
1287 */
1288 rc = if_detach_internal(ifp, true);
1289 if (rc != 0)
1290 return (rc);
1291
1292 /*
1293 * Perform interface-specific reassignment tasks, if provided by
1294 * the driver.
1295 */
1296 if (ifp->if_reassign != NULL)
1297 ifp->if_reassign(ifp, new_vnet, NULL);
1298
1299 /*
1300 * Switch to the context of the target vnet.
1301 */
1302 CURVNET_SET_QUIET(new_vnet);
1303 if_attach_internal(ifp, true);
1304
1305 #ifdef DEV_BPF
1306 if (ifp->if_bpf == NULL)
1307 bpfattach(ifp, bif_dlt, bif_hdrlen);
1308 #endif
1309
1310 CURVNET_RESTORE();
1311 return (0);
1312 }
1313
1314 /*
1315 * Move an ifnet to or from another child prison/vnet, specified by the jail id.
1316 */
1317 static int
1318 if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid)
1319 {
1320 struct prison *pr;
1321 struct ifnet *difp;
1322 int error;
1323 bool found __diagused;
1324 bool shutdown;
1325
1326 MPASS(ifindex_table[ifp->if_index].ife_ifnet == ifp);
1327
1328 /* Try to find the prison within our visibility. */
1329 sx_slock(&allprison_lock);
1330 pr = prison_find_child(td->td_ucred->cr_prison, jid);
1331 sx_sunlock(&allprison_lock);
1332 if (pr == NULL)
1333 return (ENXIO);
1334 prison_hold_locked(pr);
1335 mtx_unlock(&pr->pr_mtx);
1336
1337 /* Do not try to move the iface from and to the same prison. */
1338 if (pr->pr_vnet == ifp->if_vnet) {
1339 prison_free(pr);
1340 return (EEXIST);
1341 }
1342
1343 /* Make sure the named iface does not exists in the dst. prison/vnet. */
1344 /* XXX Lock interfaces to avoid races. */
1345 CURVNET_SET_QUIET(pr->pr_vnet);
1346 difp = ifunit(ifname);
1347 if (difp != NULL) {
1348 CURVNET_RESTORE();
1349 prison_free(pr);
1350 return (EEXIST);
1351 }
1352 sx_xlock(&ifnet_detach_sxlock);
1353
1354 /* Make sure the VNET is stable. */
1355 shutdown = VNET_IS_SHUTTING_DOWN(ifp->if_vnet);
1356 if (shutdown) {
1357 sx_xunlock(&ifnet_detach_sxlock);
1358 CURVNET_RESTORE();
1359 prison_free(pr);
1360 return (EBUSY);
1361 }
1362 CURVNET_RESTORE();
1363
1364 found = if_unlink_ifnet(ifp, true);
1365 if (! found) {
1366 sx_xunlock(&ifnet_detach_sxlock);
1367 CURVNET_RESTORE();
1368 prison_free(pr);
1369 return (ENODEV);
1370 }
1371
1372 /* Move the interface into the child jail/vnet. */
1373 error = if_vmove(ifp, pr->pr_vnet);
1374
1375 /* Report the new if_xname back to the userland on success. */
1376 if (error == 0)
1377 sprintf(ifname, "%s", ifp->if_xname);
1378
1379 sx_xunlock(&ifnet_detach_sxlock);
1380
1381 prison_free(pr);
1382 return (error);
1383 }
1384
1385 static int
1386 if_vmove_reclaim(struct thread *td, char *ifname, int jid)
1387 {
1388 struct prison *pr;
1389 struct vnet *vnet_dst;
1390 struct ifnet *ifp;
1391 int error, found __diagused;
1392 bool shutdown;
1393
1394 /* Try to find the prison within our visibility. */
1395 sx_slock(&allprison_lock);
1396 pr = prison_find_child(td->td_ucred->cr_prison, jid);
1397 sx_sunlock(&allprison_lock);
1398 if (pr == NULL)
1399 return (ENXIO);
1400 prison_hold_locked(pr);
1401 mtx_unlock(&pr->pr_mtx);
1402
1403 /* Make sure the named iface exists in the source prison/vnet. */
1404 CURVNET_SET(pr->pr_vnet);
1405 ifp = ifunit(ifname); /* XXX Lock to avoid races. */
1406 if (ifp == NULL) {
1407 CURVNET_RESTORE();
1408 prison_free(pr);
1409 return (ENXIO);
1410 }
1411
1412 /* Do not try to move the iface from and to the same prison. */
1413 vnet_dst = TD_TO_VNET(td);
1414 if (vnet_dst == ifp->if_vnet) {
1415 CURVNET_RESTORE();
1416 prison_free(pr);
1417 return (EEXIST);
1418 }
1419
1420 /* Make sure the VNET is stable. */
1421 shutdown = VNET_IS_SHUTTING_DOWN(ifp->if_vnet);
1422 if (shutdown) {
1423 CURVNET_RESTORE();
1424 prison_free(pr);
1425 return (EBUSY);
1426 }
1427
1428 /* Get interface back from child jail/vnet. */
1429 found = if_unlink_ifnet(ifp, true);
1430 MPASS(found);
1431 sx_xlock(&ifnet_detach_sxlock);
1432 error = if_vmove(ifp, vnet_dst);
1433 sx_xunlock(&ifnet_detach_sxlock);
1434 CURVNET_RESTORE();
1435
1436 /* Report the new if_xname back to the userland on success. */
1437 if (error == 0)
1438 sprintf(ifname, "%s", ifp->if_xname);
1439
1440 prison_free(pr);
1441 return (error);
1442 }
1443 #endif /* VIMAGE */
1444
1445 /*
1446 * Add a group to an interface
1447 */
1448 int
1449 if_addgroup(struct ifnet *ifp, const char *groupname)
1450 {
1451 struct ifg_list *ifgl;
1452 struct ifg_group *ifg = NULL;
1453 struct ifg_member *ifgm;
1454 int new = 0;
1455
1456 if (groupname[0] && groupname[strlen(groupname) - 1] >= '' &&
1457 groupname[strlen(groupname) - 1] <= '9')
1458 return (EINVAL);
1459
1460 IFNET_WLOCK();
1461 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1462 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) {
1463 IFNET_WUNLOCK();
1464 return (EEXIST);
1465 }
1466
1467 if ((ifgl = malloc(sizeof(*ifgl), M_TEMP, M_NOWAIT)) == NULL) {
1468 IFNET_WUNLOCK();
1469 return (ENOMEM);
1470 }
1471
1472 if ((ifgm = malloc(sizeof(*ifgm), M_TEMP, M_NOWAIT)) == NULL) {
1473 free(ifgl, M_TEMP);
1474 IFNET_WUNLOCK();
1475 return (ENOMEM);
1476 }
1477
1478 CK_STAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
1479 if (!strcmp(ifg->ifg_group, groupname))
1480 break;
1481
1482 if (ifg == NULL) {
1483 if ((ifg = malloc(sizeof(*ifg), M_TEMP, M_NOWAIT)) == NULL) {
1484 free(ifgl, M_TEMP);
1485 free(ifgm, M_TEMP);
1486 IFNET_WUNLOCK();
1487 return (ENOMEM);
1488 }
1489 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group));
1490 ifg->ifg_refcnt = 0;
1491 CK_STAILQ_INIT(&ifg->ifg_members);
1492 CK_STAILQ_INSERT_TAIL(&V_ifg_head, ifg, ifg_next);
1493 new = 1;
1494 }
1495
1496 ifg->ifg_refcnt++;
1497 ifgl->ifgl_group = ifg;
1498 ifgm->ifgm_ifp = ifp;
1499
1500 IF_ADDR_WLOCK(ifp);
1501 CK_STAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next);
1502 CK_STAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next);
1503 IF_ADDR_WUNLOCK(ifp);
1504
1505 IFNET_WUNLOCK();
1506
1507 if (new)
1508 EVENTHANDLER_INVOKE(group_attach_event, ifg);
1509 EVENTHANDLER_INVOKE(group_change_event, groupname);
1510
1511 return (0);
1512 }
1513
1514 /*
1515 * Helper function to remove a group out of an interface. Expects the global
1516 * ifnet lock to be write-locked, and drops it before returning.
1517 */
1518 static void
1519 _if_delgroup_locked(struct ifnet *ifp, struct ifg_list *ifgl,
1520 const char *groupname)
1521 {
1522 struct ifg_member *ifgm;
1523 bool freeifgl;
1524
1525 IFNET_WLOCK_ASSERT();
1526
1527 IF_ADDR_WLOCK(ifp);
1528 CK_STAILQ_REMOVE(&ifp->if_groups, ifgl, ifg_list, ifgl_next);
1529 IF_ADDR_WUNLOCK(ifp);
1530
1531 CK_STAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) {
1532 if (ifgm->ifgm_ifp == ifp) {
1533 CK_STAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm,
1534 ifg_member, ifgm_next);
1535 break;
1536 }
1537 }
1538
1539 if (--ifgl->ifgl_group->ifg_refcnt == 0) {
1540 CK_STAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_group,
1541 ifg_next);
1542 freeifgl = true;
1543 } else {
1544 freeifgl = false;
1545 }
1546 IFNET_WUNLOCK();
1547
1548 epoch_wait_preempt(net_epoch_preempt);
1549 EVENTHANDLER_INVOKE(group_change_event, groupname);
1550 if (freeifgl) {
1551 EVENTHANDLER_INVOKE(group_detach_event, ifgl->ifgl_group);
1552 free(ifgl->ifgl_group, M_TEMP);
1553 }
1554 free(ifgm, M_TEMP);
1555 free(ifgl, M_TEMP);
1556 }
1557
1558 /*
1559 * Remove a group from an interface
1560 */
1561 int
1562 if_delgroup(struct ifnet *ifp, const char *groupname)
1563 {
1564 struct ifg_list *ifgl;
1565
1566 IFNET_WLOCK();
1567 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1568 if (strcmp(ifgl->ifgl_group->ifg_group, groupname) == 0)
1569 break;
1570 if (ifgl == NULL) {
1571 IFNET_WUNLOCK();
1572 return (ENOENT);
1573 }
1574
1575 _if_delgroup_locked(ifp, ifgl, groupname);
1576
1577 return (0);
1578 }
1579
1580 /*
1581 * Remove an interface from all groups
1582 */
1583 static void
1584 if_delgroups(struct ifnet *ifp)
1585 {
1586 struct ifg_list *ifgl;
1587 char groupname[IFNAMSIZ];
1588
1589 IFNET_WLOCK();
1590 while ((ifgl = CK_STAILQ_FIRST(&ifp->if_groups)) != NULL) {
1591 strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ);
1592 _if_delgroup_locked(ifp, ifgl, groupname);
1593 IFNET_WLOCK();
1594 }
1595 IFNET_WUNLOCK();
1596 }
1597
1598 /*
1599 * Stores all groups from an interface in memory pointed to by ifgr.
1600 */
1601 static int
1602 if_getgroup(struct ifgroupreq *ifgr, struct ifnet *ifp)
1603 {
1604 int len, error;
1605 struct ifg_list *ifgl;
1606 struct ifg_req ifgrq, *ifgp;
1607
1608 NET_EPOCH_ASSERT();
1609
1610 if (ifgr->ifgr_len == 0) {
1611 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1612 ifgr->ifgr_len += sizeof(struct ifg_req);
1613 return (0);
1614 }
1615
1616 len = ifgr->ifgr_len;
1617 ifgp = ifgr->ifgr_groups;
1618 /* XXX: wire */
1619 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) {
1620 if (len < sizeof(ifgrq))
1621 return (EINVAL);
1622 bzero(&ifgrq, sizeof ifgrq);
1623 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group,
1624 sizeof(ifgrq.ifgrq_group));
1625 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req))))
1626 return (error);
1627 len -= sizeof(ifgrq);
1628 ifgp++;
1629 }
1630
1631 return (0);
1632 }
1633
1634 /*
1635 * Stores all members of a group in memory pointed to by igfr
1636 */
1637 static int
1638 if_getgroupmembers(struct ifgroupreq *ifgr)
1639 {
1640 struct ifg_group *ifg;
1641 struct ifg_member *ifgm;
1642 struct ifg_req ifgrq, *ifgp;
1643 int len, error;
1644
1645 IFNET_RLOCK();
1646 CK_STAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
1647 if (strcmp(ifg->ifg_group, ifgr->ifgr_name) == 0)
1648 break;
1649 if (ifg == NULL) {
1650 IFNET_RUNLOCK();
1651 return (ENOENT);
1652 }
1653
1654 if (ifgr->ifgr_len == 0) {
1655 CK_STAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next)
1656 ifgr->ifgr_len += sizeof(ifgrq);
1657 IFNET_RUNLOCK();
1658 return (0);
1659 }
1660
1661 len = ifgr->ifgr_len;
1662 ifgp = ifgr->ifgr_groups;
1663 CK_STAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) {
1664 if (len < sizeof(ifgrq)) {
1665 IFNET_RUNLOCK();
1666 return (EINVAL);
1667 }
1668 bzero(&ifgrq, sizeof ifgrq);
1669 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname,
1670 sizeof(ifgrq.ifgrq_member));
1671 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) {
1672 IFNET_RUNLOCK();
1673 return (error);
1674 }
1675 len -= sizeof(ifgrq);
1676 ifgp++;
1677 }
1678 IFNET_RUNLOCK();
1679
1680 return (0);
1681 }
1682
1683 /*
1684 * Return counter values from counter(9)s stored in ifnet.
1685 */
1686 uint64_t
1687 if_get_counter_default(struct ifnet *ifp, ift_counter cnt)
1688 {
1689
1690 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1691
1692 return (counter_u64_fetch(ifp->if_counters[cnt]));
1693 }
1694
1695 /*
1696 * Increase an ifnet counter. Usually used for counters shared
1697 * between the stack and a driver, but function supports them all.
1698 */
1699 void
1700 if_inc_counter(struct ifnet *ifp, ift_counter cnt, int64_t inc)
1701 {
1702
1703 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1704
1705 counter_u64_add(ifp->if_counters[cnt], inc);
1706 }
1707
1708 /*
1709 * Copy data from ifnet to userland API structure if_data.
1710 */
1711 void
1712 if_data_copy(struct ifnet *ifp, struct if_data *ifd)
1713 {
1714
1715 ifd->ifi_type = ifp->if_type;
1716 ifd->ifi_physical = 0;
1717 ifd->ifi_addrlen = ifp->if_addrlen;
1718 ifd->ifi_hdrlen = ifp->if_hdrlen;
1719 ifd->ifi_link_state = ifp->if_link_state;
1720 ifd->ifi_vhid = 0;
1721 ifd->ifi_datalen = sizeof(struct if_data);
1722 ifd->ifi_mtu = ifp->if_mtu;
1723 ifd->ifi_metric = ifp->if_metric;
1724 ifd->ifi_baudrate = ifp->if_baudrate;
1725 ifd->ifi_hwassist = ifp->if_hwassist;
1726 ifd->ifi_epoch = ifp->if_epoch;
1727 ifd->ifi_lastchange = ifp->if_lastchange;
1728
1729 ifd->ifi_ipackets = ifp->if_get_counter(ifp, IFCOUNTER_IPACKETS);
1730 ifd->ifi_ierrors = ifp->if_get_counter(ifp, IFCOUNTER_IERRORS);
1731 ifd->ifi_opackets = ifp->if_get_counter(ifp, IFCOUNTER_OPACKETS);
1732 ifd->ifi_oerrors = ifp->if_get_counter(ifp, IFCOUNTER_OERRORS);
1733 ifd->ifi_collisions = ifp->if_get_counter(ifp, IFCOUNTER_COLLISIONS);
1734 ifd->ifi_ibytes = ifp->if_get_counter(ifp, IFCOUNTER_IBYTES);
1735 ifd->ifi_obytes = ifp->if_get_counter(ifp, IFCOUNTER_OBYTES);
1736 ifd->ifi_imcasts = ifp->if_get_counter(ifp, IFCOUNTER_IMCASTS);
1737 ifd->ifi_omcasts = ifp->if_get_counter(ifp, IFCOUNTER_OMCASTS);
1738 ifd->ifi_iqdrops = ifp->if_get_counter(ifp, IFCOUNTER_IQDROPS);
1739 ifd->ifi_oqdrops = ifp->if_get_counter(ifp, IFCOUNTER_OQDROPS);
1740 ifd->ifi_noproto = ifp->if_get_counter(ifp, IFCOUNTER_NOPROTO);
1741 }
1742
1743 /*
1744 * Initialization, destruction and refcounting functions for ifaddrs.
1745 */
1746 struct ifaddr *
1747 ifa_alloc(size_t size, int flags)
1748 {
1749 struct ifaddr *ifa;
1750
1751 KASSERT(size >= sizeof(struct ifaddr),
1752 ("%s: invalid size %zu", __func__, size));
1753
1754 ifa = malloc(size, M_IFADDR, M_ZERO | flags);
1755 if (ifa == NULL)
1756 return (NULL);
1757
1758 if ((ifa->ifa_opackets = counter_u64_alloc(flags)) == NULL)
1759 goto fail;
1760 if ((ifa->ifa_ipackets = counter_u64_alloc(flags)) == NULL)
1761 goto fail;
1762 if ((ifa->ifa_obytes = counter_u64_alloc(flags)) == NULL)
1763 goto fail;
1764 if ((ifa->ifa_ibytes = counter_u64_alloc(flags)) == NULL)
1765 goto fail;
1766
1767 refcount_init(&ifa->ifa_refcnt, 1);
1768
1769 return (ifa);
1770
1771 fail:
1772 /* free(NULL) is okay */
1773 counter_u64_free(ifa->ifa_opackets);
1774 counter_u64_free(ifa->ifa_ipackets);
1775 counter_u64_free(ifa->ifa_obytes);
1776 counter_u64_free(ifa->ifa_ibytes);
1777 free(ifa, M_IFADDR);
1778
1779 return (NULL);
1780 }
1781
1782 void
1783 ifa_ref(struct ifaddr *ifa)
1784 {
1785 u_int old __diagused;
1786
1787 old = refcount_acquire(&ifa->ifa_refcnt);
1788 KASSERT(old > 0, ("%s: ifa %p has 0 refs", __func__, ifa));
1789 }
1790
1791 int
1792 ifa_try_ref(struct ifaddr *ifa)
1793 {
1794
1795 NET_EPOCH_ASSERT();
1796 return (refcount_acquire_if_not_zero(&ifa->ifa_refcnt));
1797 }
1798
1799 static void
1800 ifa_destroy(epoch_context_t ctx)
1801 {
1802 struct ifaddr *ifa;
1803
1804 ifa = __containerof(ctx, struct ifaddr, ifa_epoch_ctx);
1805 counter_u64_free(ifa->ifa_opackets);
1806 counter_u64_free(ifa->ifa_ipackets);
1807 counter_u64_free(ifa->ifa_obytes);
1808 counter_u64_free(ifa->ifa_ibytes);
1809 free(ifa, M_IFADDR);
1810 }
1811
1812 void
1813 ifa_free(struct ifaddr *ifa)
1814 {
1815
1816 if (refcount_release(&ifa->ifa_refcnt))
1817 NET_EPOCH_CALL(ifa_destroy, &ifa->ifa_epoch_ctx);
1818 }
1819
1820 /*
1821 * XXX: Because sockaddr_dl has deeper structure than the sockaddr
1822 * structs used to represent other address families, it is necessary
1823 * to perform a different comparison.
1824 */
1825
1826 #define sa_dl_equal(a1, a2) \
1827 ((((const struct sockaddr_dl *)(a1))->sdl_len == \
1828 ((const struct sockaddr_dl *)(a2))->sdl_len) && \
1829 (bcmp(CLLADDR((const struct sockaddr_dl *)(a1)), \
1830 CLLADDR((const struct sockaddr_dl *)(a2)), \
1831 ((const struct sockaddr_dl *)(a1))->sdl_alen) == 0))
1832
1833 /*
1834 * Locate an interface based on a complete address.
1835 */
1836 /*ARGSUSED*/
1837 struct ifaddr *
1838 ifa_ifwithaddr(const struct sockaddr *addr)
1839 {
1840 struct ifnet *ifp;
1841 struct ifaddr *ifa;
1842
1843 NET_EPOCH_ASSERT();
1844
1845 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1846 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1847 if (ifa->ifa_addr->sa_family != addr->sa_family)
1848 continue;
1849 if (sa_equal(addr, ifa->ifa_addr)) {
1850 goto done;
1851 }
1852 /* IP6 doesn't have broadcast */
1853 if ((ifp->if_flags & IFF_BROADCAST) &&
1854 ifa->ifa_broadaddr &&
1855 ifa->ifa_broadaddr->sa_len != 0 &&
1856 sa_equal(ifa->ifa_broadaddr, addr)) {
1857 goto done;
1858 }
1859 }
1860 }
1861 ifa = NULL;
1862 done:
1863 return (ifa);
1864 }
1865
1866 int
1867 ifa_ifwithaddr_check(const struct sockaddr *addr)
1868 {
1869 struct epoch_tracker et;
1870 int rc;
1871
1872 NET_EPOCH_ENTER(et);
1873 rc = (ifa_ifwithaddr(addr) != NULL);
1874 NET_EPOCH_EXIT(et);
1875 return (rc);
1876 }
1877
1878 /*
1879 * Locate an interface based on the broadcast address.
1880 */
1881 /* ARGSUSED */
1882 struct ifaddr *
1883 ifa_ifwithbroadaddr(const struct sockaddr *addr, int fibnum)
1884 {
1885 struct ifnet *ifp;
1886 struct ifaddr *ifa;
1887
1888 NET_EPOCH_ASSERT();
1889 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1890 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1891 continue;
1892 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1893 if (ifa->ifa_addr->sa_family != addr->sa_family)
1894 continue;
1895 if ((ifp->if_flags & IFF_BROADCAST) &&
1896 ifa->ifa_broadaddr &&
1897 ifa->ifa_broadaddr->sa_len != 0 &&
1898 sa_equal(ifa->ifa_broadaddr, addr)) {
1899 goto done;
1900 }
1901 }
1902 }
1903 ifa = NULL;
1904 done:
1905 return (ifa);
1906 }
1907
1908 /*
1909 * Locate the point to point interface with a given destination address.
1910 */
1911 /*ARGSUSED*/
1912 struct ifaddr *
1913 ifa_ifwithdstaddr(const struct sockaddr *addr, int fibnum)
1914 {
1915 struct ifnet *ifp;
1916 struct ifaddr *ifa;
1917
1918 NET_EPOCH_ASSERT();
1919 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1920 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
1921 continue;
1922 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1923 continue;
1924 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1925 if (ifa->ifa_addr->sa_family != addr->sa_family)
1926 continue;
1927 if (ifa->ifa_dstaddr != NULL &&
1928 sa_equal(addr, ifa->ifa_dstaddr)) {
1929 goto done;
1930 }
1931 }
1932 }
1933 ifa = NULL;
1934 done:
1935 return (ifa);
1936 }
1937
1938 /*
1939 * Find an interface on a specific network. If many, choice
1940 * is most specific found.
1941 */
1942 struct ifaddr *
1943 ifa_ifwithnet(const struct sockaddr *addr, int ignore_ptp, int fibnum)
1944 {
1945 struct ifnet *ifp;
1946 struct ifaddr *ifa;
1947 struct ifaddr *ifa_maybe = NULL;
1948 u_int af = addr->sa_family;
1949 const char *addr_data = addr->sa_data, *cplim;
1950
1951 NET_EPOCH_ASSERT();
1952 /*
1953 * AF_LINK addresses can be looked up directly by their index number,
1954 * so do that if we can.
1955 */
1956 if (af == AF_LINK) {
1957 ifp = ifnet_byindex(
1958 ((const struct sockaddr_dl *)addr)->sdl_index);
1959 return (ifp ? ifp->if_addr : NULL);
1960 }
1961
1962 /*
1963 * Scan though each interface, looking for ones that have addresses
1964 * in this address family and the requested fib.
1965 */
1966 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1967 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1968 continue;
1969 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1970 const char *cp, *cp2, *cp3;
1971
1972 if (ifa->ifa_addr->sa_family != af)
1973 next: continue;
1974 if (af == AF_INET &&
1975 ifp->if_flags & IFF_POINTOPOINT && !ignore_ptp) {
1976 /*
1977 * This is a bit broken as it doesn't
1978 * take into account that the remote end may
1979 * be a single node in the network we are
1980 * looking for.
1981 * The trouble is that we don't know the
1982 * netmask for the remote end.
1983 */
1984 if (ifa->ifa_dstaddr != NULL &&
1985 sa_equal(addr, ifa->ifa_dstaddr)) {
1986 goto done;
1987 }
1988 } else {
1989 /*
1990 * Scan all the bits in the ifa's address.
1991 * If a bit dissagrees with what we are
1992 * looking for, mask it with the netmask
1993 * to see if it really matters.
1994 * (A byte at a time)
1995 */
1996 if (ifa->ifa_netmask == 0)
1997 continue;
1998 cp = addr_data;
1999 cp2 = ifa->ifa_addr->sa_data;
2000 cp3 = ifa->ifa_netmask->sa_data;
2001 cplim = ifa->ifa_netmask->sa_len
2002 + (char *)ifa->ifa_netmask;
2003 while (cp3 < cplim)
2004 if ((*cp++ ^ *cp2++) & *cp3++)
2005 goto next; /* next address! */
2006 /*
2007 * If the netmask of what we just found
2008 * is more specific than what we had before
2009 * (if we had one), or if the virtual status
2010 * of new prefix is better than of the old one,
2011 * then remember the new one before continuing
2012 * to search for an even better one.
2013 */
2014 if (ifa_maybe == NULL ||
2015 ifa_preferred(ifa_maybe, ifa) ||
2016 rn_refines((caddr_t)ifa->ifa_netmask,
2017 (caddr_t)ifa_maybe->ifa_netmask)) {
2018 ifa_maybe = ifa;
2019 }
2020 }
2021 }
2022 }
2023 ifa = ifa_maybe;
2024 ifa_maybe = NULL;
2025 done:
2026 return (ifa);
2027 }
2028
2029 /*
2030 * Find an interface address specific to an interface best matching
2031 * a given address.
2032 */
2033 struct ifaddr *
2034 ifaof_ifpforaddr(const struct sockaddr *addr, struct ifnet *ifp)
2035 {
2036 struct ifaddr *ifa;
2037 const char *cp, *cp2, *cp3;
2038 char *cplim;
2039 struct ifaddr *ifa_maybe = NULL;
2040 u_int af = addr->sa_family;
2041
2042 if (af >= AF_MAX)
2043 return (NULL);
2044
2045 NET_EPOCH_ASSERT();
2046 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2047 if (ifa->ifa_addr->sa_family != af)
2048 continue;
2049 if (ifa_maybe == NULL)
2050 ifa_maybe = ifa;
2051 if (ifa->ifa_netmask == 0) {
2052 if (sa_equal(addr, ifa->ifa_addr) ||
2053 (ifa->ifa_dstaddr &&
2054 sa_equal(addr, ifa->ifa_dstaddr)))
2055 goto done;
2056 continue;
2057 }
2058 if (ifp->if_flags & IFF_POINTOPOINT) {
2059 if (sa_equal(addr, ifa->ifa_dstaddr))
2060 goto done;
2061 } else {
2062 cp = addr->sa_data;
2063 cp2 = ifa->ifa_addr->sa_data;
2064 cp3 = ifa->ifa_netmask->sa_data;
2065 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
2066 for (; cp3 < cplim; cp3++)
2067 if ((*cp++ ^ *cp2++) & *cp3)
2068 break;
2069 if (cp3 == cplim)
2070 goto done;
2071 }
2072 }
2073 ifa = ifa_maybe;
2074 done:
2075 return (ifa);
2076 }
2077
2078 /*
2079 * See whether new ifa is better than current one:
2080 * 1) A non-virtual one is preferred over virtual.
2081 * 2) A virtual in master state preferred over any other state.
2082 *
2083 * Used in several address selecting functions.
2084 */
2085 int
2086 ifa_preferred(struct ifaddr *cur, struct ifaddr *next)
2087 {
2088
2089 return (cur->ifa_carp && (!next->ifa_carp ||
2090 ((*carp_master_p)(next) && !(*carp_master_p)(cur))));
2091 }
2092
2093 struct sockaddr_dl *
2094 link_alloc_sdl(size_t size, int flags)
2095 {
2096
2097 return (malloc(size, M_TEMP, flags));
2098 }
2099
2100 void
2101 link_free_sdl(struct sockaddr *sa)
2102 {
2103 free(sa, M_TEMP);
2104 }
2105
2106 /*
2107 * Fills in given sdl with interface basic info.
2108 * Returns pointer to filled sdl.
2109 */
2110 struct sockaddr_dl *
2111 link_init_sdl(struct ifnet *ifp, struct sockaddr *paddr, u_char iftype)
2112 {
2113 struct sockaddr_dl *sdl;
2114
2115 sdl = (struct sockaddr_dl *)paddr;
2116 memset(sdl, 0, sizeof(struct sockaddr_dl));
2117 sdl->sdl_len = sizeof(struct sockaddr_dl);
2118 sdl->sdl_family = AF_LINK;
2119 sdl->sdl_index = ifp->if_index;
2120 sdl->sdl_type = iftype;
2121
2122 return (sdl);
2123 }
2124
2125 /*
2126 * Mark an interface down and notify protocols of
2127 * the transition.
2128 */
2129 static void
2130 if_unroute(struct ifnet *ifp, int flag, int fam)
2131 {
2132
2133 KASSERT(flag == IFF_UP, ("if_unroute: flag != IFF_UP"));
2134
2135 ifp->if_flags &= ~flag;
2136 getmicrotime(&ifp->if_lastchange);
2137 ifp->if_qflush(ifp);
2138
2139 if (ifp->if_carp)
2140 (*carp_linkstate_p)(ifp);
2141 rt_ifmsg(ifp, IFF_UP);
2142 }
2143
2144 /*
2145 * Mark an interface up and notify protocols of
2146 * the transition.
2147 */
2148 static void
2149 if_route(struct ifnet *ifp, int flag, int fam)
2150 {
2151
2152 KASSERT(flag == IFF_UP, ("if_route: flag != IFF_UP"));
2153
2154 ifp->if_flags |= flag;
2155 getmicrotime(&ifp->if_lastchange);
2156 if (ifp->if_carp)
2157 (*carp_linkstate_p)(ifp);
2158 rt_ifmsg(ifp, IFF_UP);
2159 #ifdef INET6
2160 in6_if_up(ifp);
2161 #endif
2162 }
2163
2164 void (*vlan_link_state_p)(struct ifnet *); /* XXX: private from if_vlan */
2165 void (*vlan_trunk_cap_p)(struct ifnet *); /* XXX: private from if_vlan */
2166 struct ifnet *(*vlan_trunkdev_p)(struct ifnet *);
2167 struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t);
2168 int (*vlan_tag_p)(struct ifnet *, uint16_t *);
2169 int (*vlan_pcp_p)(struct ifnet *, uint16_t *);
2170 int (*vlan_setcookie_p)(struct ifnet *, void *);
2171 void *(*vlan_cookie_p)(struct ifnet *);
2172
2173 /*
2174 * Handle a change in the interface link state. To avoid LORs
2175 * between driver lock and upper layer locks, as well as possible
2176 * recursions, we post event to taskqueue, and all job
2177 * is done in static do_link_state_change().
2178 */
2179 void
2180 if_link_state_change(struct ifnet *ifp, int link_state)
2181 {
2182 /* Return if state hasn't changed. */
2183 if (ifp->if_link_state == link_state)
2184 return;
2185
2186 ifp->if_link_state = link_state;
2187
2188 /* XXXGL: reference ifp? */
2189 taskqueue_enqueue(taskqueue_swi, &ifp->if_linktask);
2190 }
2191
2192 static void
2193 do_link_state_change(void *arg, int pending)
2194 {
2195 struct ifnet *ifp;
2196 int link_state;
2197
2198 ifp = arg;
2199 link_state = ifp->if_link_state;
2200
2201 CURVNET_SET(ifp->if_vnet);
2202 rt_ifmsg(ifp, 0);
2203 if (ifp->if_vlantrunk != NULL)
2204 (*vlan_link_state_p)(ifp);
2205
2206 if ((ifp->if_type == IFT_ETHER || ifp->if_type == IFT_L2VLAN) &&
2207 ifp->if_l2com != NULL)
2208 (*ng_ether_link_state_p)(ifp, link_state);
2209 if (ifp->if_carp)
2210 (*carp_linkstate_p)(ifp);
2211 if (ifp->if_bridge)
2212 ifp->if_bridge_linkstate(ifp);
2213 if (ifp->if_lagg)
2214 (*lagg_linkstate_p)(ifp, link_state);
2215
2216 if (IS_DEFAULT_VNET(curvnet))
2217 devctl_notify("IFNET", ifp->if_xname,
2218 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN",
2219 NULL);
2220 if (pending > 1)
2221 if_printf(ifp, "%d link states coalesced\n", pending);
2222 if (log_link_state_change)
2223 if_printf(ifp, "link state changed to %s\n",
2224 (link_state == LINK_STATE_UP) ? "UP" : "DOWN" );
2225 EVENTHANDLER_INVOKE(ifnet_link_event, ifp, link_state);
2226 CURVNET_RESTORE();
2227 }
2228
2229 /*
2230 * Mark an interface down and notify protocols of
2231 * the transition.
2232 */
2233 void
2234 if_down(struct ifnet *ifp)
2235 {
2236
2237 EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_DOWN);
2238 if_unroute(ifp, IFF_UP, AF_UNSPEC);
2239 }
2240
2241 /*
2242 * Mark an interface up and notify protocols of
2243 * the transition.
2244 */
2245 void
2246 if_up(struct ifnet *ifp)
2247 {
2248
2249 if_route(ifp, IFF_UP, AF_UNSPEC);
2250 EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_UP);
2251 }
2252
2253 /*
2254 * Flush an interface queue.
2255 */
2256 void
2257 if_qflush(struct ifnet *ifp)
2258 {
2259 struct mbuf *m, *n;
2260 struct ifaltq *ifq;
2261
2262 ifq = &ifp->if_snd;
2263 IFQ_LOCK(ifq);
2264 #ifdef ALTQ
2265 if (ALTQ_IS_ENABLED(ifq))
2266 ALTQ_PURGE(ifq);
2267 #endif
2268 n = ifq->ifq_head;
2269 while ((m = n) != NULL) {
2270 n = m->m_nextpkt;
2271 m_freem(m);
2272 }
2273 ifq->ifq_head = 0;
2274 ifq->ifq_tail = 0;
2275 ifq->ifq_len = 0;
2276 IFQ_UNLOCK(ifq);
2277 }
2278
2279 /*
2280 * Map interface name to interface structure pointer, with or without
2281 * returning a reference.
2282 */
2283 struct ifnet *
2284 ifunit_ref(const char *name)
2285 {
2286 struct epoch_tracker et;
2287 struct ifnet *ifp;
2288
2289 NET_EPOCH_ENTER(et);
2290 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2291 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0 &&
2292 !(ifp->if_flags & IFF_DYING))
2293 break;
2294 }
2295 if (ifp != NULL) {
2296 if_ref(ifp);
2297 MPASS(ifindex_table[ifp->if_index].ife_ifnet == ifp);
2298 }
2299
2300 NET_EPOCH_EXIT(et);
2301 return (ifp);
2302 }
2303
2304 struct ifnet *
2305 ifunit(const char *name)
2306 {
2307 struct epoch_tracker et;
2308 struct ifnet *ifp;
2309
2310 NET_EPOCH_ENTER(et);
2311 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2312 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0)
2313 break;
2314 }
2315 NET_EPOCH_EXIT(et);
2316 return (ifp);
2317 }
2318
2319 void *
2320 ifr_buffer_get_buffer(void *data)
2321 {
2322 union ifreq_union *ifrup;
2323
2324 ifrup = data;
2325 #ifdef COMPAT_FREEBSD32
2326 if (SV_CURPROC_FLAG(SV_ILP32))
2327 return ((void *)(uintptr_t)
2328 ifrup->ifr32.ifr_ifru.ifru_buffer.buffer);
2329 #endif
2330 return (ifrup->ifr.ifr_ifru.ifru_buffer.buffer);
2331 }
2332
2333 static void
2334 ifr_buffer_set_buffer_null(void *data)
2335 {
2336 union ifreq_union *ifrup;
2337
2338 ifrup = data;
2339 #ifdef COMPAT_FREEBSD32
2340 if (SV_CURPROC_FLAG(SV_ILP32))
2341 ifrup->ifr32.ifr_ifru.ifru_buffer.buffer = 0;
2342 else
2343 #endif
2344 ifrup->ifr.ifr_ifru.ifru_buffer.buffer = NULL;
2345 }
2346
2347 size_t
2348 ifr_buffer_get_length(void *data)
2349 {
2350 union ifreq_union *ifrup;
2351
2352 ifrup = data;
2353 #ifdef COMPAT_FREEBSD32
2354 if (SV_CURPROC_FLAG(SV_ILP32))
2355 return (ifrup->ifr32.ifr_ifru.ifru_buffer.length);
2356 #endif
2357 return (ifrup->ifr.ifr_ifru.ifru_buffer.length);
2358 }
2359
2360 static void
2361 ifr_buffer_set_length(void *data, size_t len)
2362 {
2363 union ifreq_union *ifrup;
2364
2365 ifrup = data;
2366 #ifdef COMPAT_FREEBSD32
2367 if (SV_CURPROC_FLAG(SV_ILP32))
2368 ifrup->ifr32.ifr_ifru.ifru_buffer.length = len;
2369 else
2370 #endif
2371 ifrup->ifr.ifr_ifru.ifru_buffer.length = len;
2372 }
2373
2374 void *
2375 ifr_data_get_ptr(void *ifrp)
2376 {
2377 union ifreq_union *ifrup;
2378
2379 ifrup = ifrp;
2380 #ifdef COMPAT_FREEBSD32
2381 if (SV_CURPROC_FLAG(SV_ILP32))
2382 return ((void *)(uintptr_t)
2383 ifrup->ifr32.ifr_ifru.ifru_data);
2384 #endif
2385 return (ifrup->ifr.ifr_ifru.ifru_data);
2386 }
2387
2388 struct ifcap_nv_bit_name {
2389 uint64_t cap_bit;
2390 const char *cap_name;
2391 };
2392 #define CAPNV(x) {.cap_bit = IFCAP_##x, \
2393 .cap_name = __CONCAT(IFCAP_, __CONCAT(x, _NAME)) }
2394 const struct ifcap_nv_bit_name ifcap_nv_bit_names[] = {
2395 CAPNV(RXCSUM),
2396 CAPNV(TXCSUM),
2397 CAPNV(NETCONS),
2398 CAPNV(VLAN_MTU),
2399 CAPNV(VLAN_HWTAGGING),
2400 CAPNV(JUMBO_MTU),
2401 CAPNV(POLLING),
2402 CAPNV(VLAN_HWCSUM),
2403 CAPNV(TSO4),
2404 CAPNV(TSO6),
2405 CAPNV(LRO),
2406 CAPNV(WOL_UCAST),
2407 CAPNV(WOL_MCAST),
2408 CAPNV(WOL_MAGIC),
2409 CAPNV(TOE4),
2410 CAPNV(TOE6),
2411 CAPNV(VLAN_HWFILTER),
2412 CAPNV(VLAN_HWTSO),
2413 CAPNV(LINKSTATE),
2414 CAPNV(NETMAP),
2415 CAPNV(RXCSUM_IPV6),
2416 CAPNV(TXCSUM_IPV6),
2417 CAPNV(HWSTATS),
2418 CAPNV(TXRTLMT),
2419 CAPNV(HWRXTSTMP),
2420 CAPNV(MEXTPG),
2421 CAPNV(TXTLS4),
2422 CAPNV(TXTLS6),
2423 CAPNV(VXLAN_HWCSUM),
2424 CAPNV(VXLAN_HWTSO),
2425 CAPNV(TXTLS_RTLMT),
2426 {0, NULL}
2427 };
2428 #define CAP2NV(x) {.cap_bit = IFCAP2_##x, \
2429 .cap_name = __CONCAT(IFCAP2_, __CONCAT(x, _NAME)) }
2430 const struct ifcap_nv_bit_name ifcap2_nv_bit_names[] = {
2431 CAP2NV(RXTLS4),
2432 CAP2NV(RXTLS6),
2433 {0, NULL}
2434 };
2435 #undef CAPNV
2436 #undef CAP2NV
2437
2438 int
2439 if_capnv_to_capint(const nvlist_t *nv, int *old_cap,
2440 const struct ifcap_nv_bit_name *nn, bool all)
2441 {
2442 int i, res;
2443
2444 res = 0;
2445 for (i = 0; nn[i].cap_name != NULL; i++) {
2446 if (nvlist_exists_bool(nv, nn[i].cap_name)) {
2447 if (all || nvlist_get_bool(nv, nn[i].cap_name))
2448 res |= nn[i].cap_bit;
2449 } else {
2450 res |= *old_cap & nn[i].cap_bit;
2451 }
2452 }
2453 return (res);
2454 }
2455
2456 void
2457 if_capint_to_capnv(nvlist_t *nv, const struct ifcap_nv_bit_name *nn,
2458 int ifr_cap, int ifr_req)
2459 {
2460 int i;
2461
2462 for (i = 0; nn[i].cap_name != NULL; i++) {
2463 if ((nn[i].cap_bit & ifr_cap) != 0) {
2464 nvlist_add_bool(nv, nn[i].cap_name,
2465 (nn[i].cap_bit & ifr_req) != 0);
2466 }
2467 }
2468 }
2469
2470 /*
2471 * Hardware specific interface ioctls.
2472 */
2473 int
2474 ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td)
2475 {
2476 struct ifreq *ifr;
2477 int error = 0, do_ifup = 0;
2478 int new_flags, temp_flags;
2479 size_t namelen, onamelen;
2480 size_t descrlen, nvbuflen;
2481 char *descrbuf;
2482 char new_name[IFNAMSIZ];
2483 char old_name[IFNAMSIZ], strbuf[IFNAMSIZ + 8];
2484 struct ifaddr *ifa;
2485 struct sockaddr_dl *sdl;
2486 void *buf;
2487 nvlist_t *nvcap;
2488 struct siocsifcapnv_driver_data drv_ioctl_data;
2489
2490 ifr = (struct ifreq *)data;
2491 switch (cmd) {
2492 case SIOCGIFINDEX:
2493 ifr->ifr_index = ifp->if_index;
2494 break;
2495
2496 case SIOCGIFFLAGS:
2497 temp_flags = ifp->if_flags | ifp->if_drv_flags;
2498 ifr->ifr_flags = temp_flags & 0xffff;
2499 ifr->ifr_flagshigh = temp_flags >> 16;
2500 break;
2501
2502 case SIOCGIFCAP:
2503 ifr->ifr_reqcap = ifp->if_capabilities;
2504 ifr->ifr_curcap = ifp->if_capenable;
2505 break;
2506
2507 case SIOCGIFCAPNV:
2508 if ((ifp->if_capabilities & IFCAP_NV) == 0) {
2509 error = EINVAL;
2510 break;
2511 }
2512 buf = NULL;
2513 nvcap = nvlist_create(0);
2514 for (;;) {
2515 if_capint_to_capnv(nvcap, ifcap_nv_bit_names,
2516 ifp->if_capabilities, ifp->if_capenable);
2517 if_capint_to_capnv(nvcap, ifcap2_nv_bit_names,
2518 ifp->if_capabilities2, ifp->if_capenable2);
2519 error = (*ifp->if_ioctl)(ifp, SIOCGIFCAPNV,
2520 __DECONST(caddr_t, nvcap));
2521 if (error != 0) {
2522 if_printf(ifp,
2523 "SIOCGIFCAPNV driver mistake: nvlist error %d\n",
2524 error);
2525 break;
2526 }
2527 buf = nvlist_pack(nvcap, &nvbuflen);
2528 if (buf == NULL) {
2529 error = nvlist_error(nvcap);
2530 if (error == 0)
2531 error = EDOOFUS;
2532 break;
2533 }
2534 if (nvbuflen > ifr->ifr_cap_nv.buf_length) {
2535 ifr->ifr_cap_nv.length = nvbuflen;
2536 ifr->ifr_cap_nv.buffer = NULL;
2537 error = EFBIG;
2538 break;
2539 }
2540 ifr->ifr_cap_nv.length = nvbuflen;
2541 error = copyout(buf, ifr->ifr_cap_nv.buffer, nvbuflen);
2542 break;
2543 }
2544 free(buf, M_NVLIST);
2545 nvlist_destroy(nvcap);
2546 break;
2547
2548 case SIOCGIFDATA:
2549 {
2550 struct if_data ifd;
2551
2552 /* Ensure uninitialised padding is not leaked. */
2553 memset(&ifd, 0, sizeof(ifd));
2554
2555 if_data_copy(ifp, &ifd);
2556 error = copyout(&ifd, ifr_data_get_ptr(ifr), sizeof(ifd));
2557 break;
2558 }
2559
2560 #ifdef MAC
2561 case SIOCGIFMAC:
2562 error = mac_ifnet_ioctl_get(td->td_ucred, ifr, ifp);
2563 break;
2564 #endif
2565
2566 case SIOCGIFMETRIC:
2567 ifr->ifr_metric = ifp->if_metric;
2568 break;
2569
2570 case SIOCGIFMTU:
2571 ifr->ifr_mtu = ifp->if_mtu;
2572 break;
2573
2574 case SIOCGIFPHYS:
2575 /* XXXGL: did this ever worked? */
2576 ifr->ifr_phys = 0;
2577 break;
2578
2579 case SIOCGIFDESCR:
2580 error = 0;
2581 sx_slock(&ifdescr_sx);
2582 if (ifp->if_description == NULL)
2583 error = ENOMSG;
2584 else {
2585 /* space for terminating nul */
2586 descrlen = strlen(ifp->if_description) + 1;
2587 if (ifr_buffer_get_length(ifr) < descrlen)
2588 ifr_buffer_set_buffer_null(ifr);
2589 else
2590 error = copyout(ifp->if_description,
2591 ifr_buffer_get_buffer(ifr), descrlen);
2592 ifr_buffer_set_length(ifr, descrlen);
2593 }
2594 sx_sunlock(&ifdescr_sx);
2595 break;
2596
2597 case SIOCSIFDESCR:
2598 error = priv_check(td, PRIV_NET_SETIFDESCR);
2599 if (error)
2600 return (error);
2601
2602 /*
2603 * Copy only (length-1) bytes to make sure that
2604 * if_description is always nul terminated. The
2605 * length parameter is supposed to count the
2606 * terminating nul in.
2607 */
2608 if (ifr_buffer_get_length(ifr) > ifdescr_maxlen)
2609 return (ENAMETOOLONG);
2610 else if (ifr_buffer_get_length(ifr) == 0)
2611 descrbuf = NULL;
2612 else {
2613 descrbuf = if_allocdescr(ifr_buffer_get_length(ifr), M_WAITOK);
2614 error = copyin(ifr_buffer_get_buffer(ifr), descrbuf,
2615 ifr_buffer_get_length(ifr) - 1);
2616 if (error) {
2617 if_freedescr(descrbuf);
2618 break;
2619 }
2620 }
2621
2622 if_setdescr(ifp, descrbuf);
2623 getmicrotime(&ifp->if_lastchange);
2624 break;
2625
2626 case SIOCGIFFIB:
2627 ifr->ifr_fib = ifp->if_fib;
2628 break;
2629
2630 case SIOCSIFFIB:
2631 error = priv_check(td, PRIV_NET_SETIFFIB);
2632 if (error)
2633 return (error);
2634 if (ifr->ifr_fib >= rt_numfibs)
2635 return (EINVAL);
2636
2637 ifp->if_fib = ifr->ifr_fib;
2638 break;
2639
2640 case SIOCSIFFLAGS:
2641 error = priv_check(td, PRIV_NET_SETIFFLAGS);
2642 if (error)
2643 return (error);
2644 /*
2645 * Currently, no driver owned flags pass the IFF_CANTCHANGE
2646 * check, so we don't need special handling here yet.
2647 */
2648 new_flags = (ifr->ifr_flags & 0xffff) |
2649 (ifr->ifr_flagshigh << 16);
2650 if (ifp->if_flags & IFF_UP &&
2651 (new_flags & IFF_UP) == 0) {
2652 if_down(ifp);
2653 } else if (new_flags & IFF_UP &&
2654 (ifp->if_flags & IFF_UP) == 0) {
2655 do_ifup = 1;
2656 }
2657 /* See if permanently promiscuous mode bit is about to flip */
2658 if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) {
2659 if (new_flags & IFF_PPROMISC)
2660 ifp->if_flags |= IFF_PROMISC;
2661 else if (ifp->if_pcount == 0)
2662 ifp->if_flags &= ~IFF_PROMISC;
2663 if (log_promisc_mode_change)
2664 if_printf(ifp, "permanently promiscuous mode %s\n",
2665 ((new_flags & IFF_PPROMISC) ?
2666 "enabled" : "disabled"));
2667 }
2668 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
2669 (new_flags &~ IFF_CANTCHANGE);
2670 if (ifp->if_ioctl) {
2671 (void) (*ifp->if_ioctl)(ifp, cmd, data);
2672 }
2673 if (do_ifup)
2674 if_up(ifp);
2675 getmicrotime(&ifp->if_lastchange);
2676 break;
2677
2678 case SIOCSIFCAP:
2679 error = priv_check(td, PRIV_NET_SETIFCAP);
2680 if (error != 0)
2681 return (error);
2682 if (ifp->if_ioctl == NULL)
2683 return (EOPNOTSUPP);
2684 if (ifr->ifr_reqcap & ~ifp->if_capabilities)
2685 return (EINVAL);
2686 error = (*ifp->if_ioctl)(ifp, cmd, data);
2687 if (error == 0)
2688 getmicrotime(&ifp->if_lastchange);
2689 break;
2690
2691 case SIOCSIFCAPNV:
2692 error = priv_check(td, PRIV_NET_SETIFCAP);
2693 if (error != 0)
2694 return (error);
2695 if (ifp->if_ioctl == NULL)
2696 return (EOPNOTSUPP);
2697 if ((ifp->if_capabilities & IFCAP_NV) == 0)
2698 return (EINVAL);
2699 if (ifr->ifr_cap_nv.length > IFR_CAP_NV_MAXBUFSIZE)
2700 return (EINVAL);
2701 nvcap = NULL;
2702 buf = malloc(ifr->ifr_cap_nv.length, M_TEMP, M_WAITOK);
2703 for (;;) {
2704 error = copyin(ifr->ifr_cap_nv.buffer, buf,
2705 ifr->ifr_cap_nv.length);
2706 if (error != 0)
2707 break;
2708 nvcap = nvlist_unpack(buf, ifr->ifr_cap_nv.length, 0);
2709 if (nvcap == NULL) {
2710 error = EINVAL;
2711 break;
2712 }
2713 drv_ioctl_data.reqcap = if_capnv_to_capint(nvcap,
2714 &ifp->if_capenable, ifcap_nv_bit_names, false);
2715 if ((drv_ioctl_data.reqcap &
2716 ~ifp->if_capabilities) != 0) {
2717 error = EINVAL;
2718 break;
2719 }
2720 drv_ioctl_data.reqcap2 = if_capnv_to_capint(nvcap,
2721 &ifp->if_capenable2, ifcap2_nv_bit_names, false);
2722 if ((drv_ioctl_data.reqcap2 &
2723 ~ifp->if_capabilities2) != 0) {
2724 error = EINVAL;
2725 break;
2726 }
2727 drv_ioctl_data.nvcap = nvcap;
2728 error = (*ifp->if_ioctl)(ifp, SIOCSIFCAPNV,
2729 (caddr_t)&drv_ioctl_data);
2730 break;
2731 }
2732 nvlist_destroy(nvcap);
2733 free(buf, M_TEMP);
2734 if (error == 0)
2735 getmicrotime(&ifp->if_lastchange);
2736 break;
2737
2738 #ifdef MAC
2739 case SIOCSIFMAC:
2740 error = mac_ifnet_ioctl_set(td->td_ucred, ifr, ifp);
2741 break;
2742 #endif
2743
2744 case SIOCSIFNAME:
2745 error = priv_check(td, PRIV_NET_SETIFNAME);
2746 if (error)
2747 return (error);
2748 error = copyinstr(ifr_data_get_ptr(ifr), new_name, IFNAMSIZ,
2749 NULL);
2750 if (error != 0)
2751 return (error);
2752 if (new_name[0] == '\0')
2753 return (EINVAL);
2754 if (strcmp(new_name, ifp->if_xname) == 0)
2755 break;
2756 if (ifunit(new_name) != NULL)
2757 return (EEXIST);
2758
2759 /*
2760 * XXX: Locking. Nothing else seems to lock if_flags,
2761 * and there are numerous other races with the
2762 * ifunit() checks not being atomic with namespace
2763 * changes (renames, vmoves, if_attach, etc).
2764 */
2765 ifp->if_flags |= IFF_RENAMING;
2766
2767 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
2768
2769 if_printf(ifp, "changing name to '%s'\n", new_name);
2770
2771 IF_ADDR_WLOCK(ifp);
2772 strlcpy(old_name, ifp->if_xname, sizeof(old_name));
2773 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname));
2774 ifa = ifp->if_addr;
2775 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
2776 namelen = strlen(new_name);
2777 onamelen = sdl->sdl_nlen;
2778 /*
2779 * Move the address if needed. This is safe because we
2780 * allocate space for a name of length IFNAMSIZ when we
2781 * create this in if_attach().
2782 */
2783 if (namelen != onamelen) {
2784 bcopy(sdl->sdl_data + onamelen,
2785 sdl->sdl_data + namelen, sdl->sdl_alen);
2786 }
2787 bcopy(new_name, sdl->sdl_data, namelen);
2788 sdl->sdl_nlen = namelen;
2789 sdl = (struct sockaddr_dl *)ifa->ifa_netmask;
2790 bzero(sdl->sdl_data, onamelen);
2791 while (namelen != 0)
2792 sdl->sdl_data[--namelen] = 0xff;
2793 IF_ADDR_WUNLOCK(ifp);
2794
2795 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
2796
2797 ifp->if_flags &= ~IFF_RENAMING;
2798
2799 snprintf(strbuf, sizeof(strbuf), "name=%s", new_name);
2800 devctl_notify("IFNET", old_name, "RENAME", strbuf);
2801 break;
2802
2803 #ifdef VIMAGE
2804 case SIOCSIFVNET:
2805 error = priv_check(td, PRIV_NET_SETIFVNET);
2806 if (error)
2807 return (error);
2808 error = if_vmove_loan(td, ifp, ifr->ifr_name, ifr->ifr_jid);
2809 break;
2810 #endif
2811
2812 case SIOCSIFMETRIC:
2813 error = priv_check(td, PRIV_NET_SETIFMETRIC);
2814 if (error)
2815 return (error);
2816 ifp->if_metric = ifr->ifr_metric;
2817 getmicrotime(&ifp->if_lastchange);
2818 break;
2819
2820 case SIOCSIFPHYS:
2821 error = priv_check(td, PRIV_NET_SETIFPHYS);
2822 if (error)
2823 return (error);
2824 if (ifp->if_ioctl == NULL)
2825 return (EOPNOTSUPP);
2826 error = (*ifp->if_ioctl)(ifp, cmd, data);
2827 if (error == 0)
2828 getmicrotime(&ifp->if_lastchange);
2829 break;
2830
2831 case SIOCSIFMTU:
2832 {
2833 u_long oldmtu = ifp->if_mtu;
2834
2835 error = priv_check(td, PRIV_NET_SETIFMTU);
2836 if (error)
2837 return (error);
2838 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU)
2839 return (EINVAL);
2840 if (ifp->if_ioctl == NULL)
2841 return (EOPNOTSUPP);
2842 /* Disallow MTU changes on bridge member interfaces. */
2843 if (ifp->if_bridge)
2844 return (EOPNOTSUPP);
2845 error = (*ifp->if_ioctl)(ifp, cmd, data);
2846 if (error == 0) {
2847 getmicrotime(&ifp->if_lastchange);
2848 rt_ifmsg(ifp, 0);
2849 #ifdef INET
2850 DEBUGNET_NOTIFY_MTU(ifp);
2851 #endif
2852 }
2853 /*
2854 * If the link MTU changed, do network layer specific procedure.
2855 */
2856 if (ifp->if_mtu != oldmtu) {
2857 #ifdef INET6
2858 nd6_setmtu(ifp);
2859 #endif
2860 rt_updatemtu(ifp);
2861 }
2862 break;
2863 }
2864
2865 case SIOCADDMULTI:
2866 case SIOCDELMULTI:
2867 if (cmd == SIOCADDMULTI)
2868 error = priv_check(td, PRIV_NET_ADDMULTI);
2869 else
2870 error = priv_check(td, PRIV_NET_DELMULTI);
2871 if (error)
2872 return (error);
2873
2874 /* Don't allow group membership on non-multicast interfaces. */
2875 if ((ifp->if_flags & IFF_MULTICAST) == 0)
2876 return (EOPNOTSUPP);
2877
2878 /* Don't let users screw up protocols' entries. */
2879 if (ifr->ifr_addr.sa_family != AF_LINK)
2880 return (EINVAL);
2881
2882 if (cmd == SIOCADDMULTI) {
2883 struct epoch_tracker et;
2884 struct ifmultiaddr *ifma;
2885
2886 /*
2887 * Userland is only permitted to join groups once
2888 * via the if_addmulti() KPI, because it cannot hold
2889 * struct ifmultiaddr * between calls. It may also
2890 * lose a race while we check if the membership
2891 * already exists.
2892 */
2893 NET_EPOCH_ENTER(et);
2894 ifma = if_findmulti(ifp, &ifr->ifr_addr);
2895 NET_EPOCH_EXIT(et);
2896 if (ifma != NULL)
2897 error = EADDRINUSE;
2898 else
2899 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma);
2900 } else {
2901 error = if_delmulti(ifp, &ifr->ifr_addr);
2902 }
2903 if (error == 0)
2904 getmicrotime(&ifp->if_lastchange);
2905 break;
2906
2907 case SIOCSIFPHYADDR:
2908 case SIOCDIFPHYADDR:
2909 #ifdef INET6
2910 case SIOCSIFPHYADDR_IN6:
2911 #endif
2912 case SIOCSIFMEDIA:
2913 case SIOCSIFGENERIC:
2914 error = priv_check(td, PRIV_NET_HWIOCTL);
2915 if (error)
2916 return (error);
2917 if (ifp->if_ioctl == NULL)
2918 return (EOPNOTSUPP);
2919 error = (*ifp->if_ioctl)(ifp, cmd, data);
2920 if (error == 0)
2921 getmicrotime(&ifp->if_lastchange);
2922 break;
2923
2924 case SIOCGIFSTATUS:
2925 case SIOCGIFPSRCADDR:
2926 case SIOCGIFPDSTADDR:
2927 case SIOCGIFMEDIA:
2928 case SIOCGIFXMEDIA:
2929 case SIOCGIFGENERIC:
2930 case SIOCGIFRSSKEY:
2931 case SIOCGIFRSSHASH:
2932 case SIOCGIFDOWNREASON:
2933 if (ifp->if_ioctl == NULL)
2934 return (EOPNOTSUPP);
2935 error = (*ifp->if_ioctl)(ifp, cmd, data);
2936 break;
2937
2938 case SIOCSIFLLADDR:
2939 error = priv_check(td, PRIV_NET_SETLLADDR);
2940 if (error)
2941 return (error);
2942 error = if_setlladdr(ifp,
2943 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len);
2944 break;
2945
2946 case SIOCGHWADDR:
2947 error = if_gethwaddr(ifp, ifr);
2948 break;
2949
2950 case SIOCAIFGROUP:
2951 error = priv_check(td, PRIV_NET_ADDIFGROUP);
2952 if (error)
2953 return (error);
2954 error = if_addgroup(ifp,
2955 ((struct ifgroupreq *)data)->ifgr_group);
2956 if (error != 0)
2957 return (error);
2958 break;
2959
2960 case SIOCGIFGROUP:
2961 {
2962 struct epoch_tracker et;
2963
2964 NET_EPOCH_ENTER(et);
2965 error = if_getgroup((struct ifgroupreq *)data, ifp);
2966 NET_EPOCH_EXIT(et);
2967 break;
2968 }
2969
2970 case SIOCDIFGROUP:
2971 error = priv_check(td, PRIV_NET_DELIFGROUP);
2972 if (error)
2973 return (error);
2974 error = if_delgroup(ifp,
2975 ((struct ifgroupreq *)data)->ifgr_group);
2976 if (error != 0)
2977 return (error);
2978 break;
2979
2980 default:
2981 error = ENOIOCTL;
2982 break;
2983 }
2984 return (error);
2985 }
2986
2987 /*
2988 * Interface ioctls.
2989 */
2990 int
2991 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td)
2992 {
2993 #ifdef COMPAT_FREEBSD32
2994 union {
2995 struct ifconf ifc;
2996 struct ifdrv ifd;
2997 struct ifgroupreq ifgr;
2998 struct ifmediareq ifmr;
2999 } thunk;
3000 u_long saved_cmd;
3001 struct ifconf32 *ifc32;
3002 struct ifdrv32 *ifd32;
3003 struct ifgroupreq32 *ifgr32;
3004 struct ifmediareq32 *ifmr32;
3005 #endif
3006 struct ifnet *ifp;
3007 struct ifreq *ifr;
3008 int error;
3009 int oif_flags;
3010 #ifdef VIMAGE
3011 bool shutdown;
3012 #endif
3013
3014 CURVNET_SET(so->so_vnet);
3015 #ifdef VIMAGE
3016 /* Make sure the VNET is stable. */
3017 shutdown = VNET_IS_SHUTTING_DOWN(so->so_vnet);
3018 if (shutdown) {
3019 CURVNET_RESTORE();
3020 return (EBUSY);
3021 }
3022 #endif
3023
3024 #ifdef COMPAT_FREEBSD32
3025 saved_cmd = cmd;
3026 switch (cmd) {
3027 case SIOCGIFCONF32:
3028 ifc32 = (struct ifconf32 *)data;
3029 thunk.ifc.ifc_len = ifc32->ifc_len;
3030 thunk.ifc.ifc_buf = PTRIN(ifc32->ifc_buf);
3031 data = (caddr_t)&thunk.ifc;
3032 cmd = SIOCGIFCONF;
3033 break;
3034 case SIOCGDRVSPEC32:
3035 case SIOCSDRVSPEC32:
3036 ifd32 = (struct ifdrv32 *)data;
3037 memcpy(thunk.ifd.ifd_name, ifd32->ifd_name,
3038 sizeof(thunk.ifd.ifd_name));
3039 thunk.ifd.ifd_cmd = ifd32->ifd_cmd;
3040 thunk.ifd.ifd_len = ifd32->ifd_len;
3041 thunk.ifd.ifd_data = PTRIN(ifd32->ifd_data);
3042 data = (caddr_t)&thunk.ifd;
3043 cmd = _IOC_NEWTYPE(cmd, struct ifdrv);
3044 break;
3045 case SIOCAIFGROUP32:
3046 case SIOCGIFGROUP32:
3047 case SIOCDIFGROUP32:
3048 case SIOCGIFGMEMB32:
3049 ifgr32 = (struct ifgroupreq32 *)data;
3050 memcpy(thunk.ifgr.ifgr_name, ifgr32->ifgr_name,
3051 sizeof(thunk.ifgr.ifgr_name));
3052 thunk.ifgr.ifgr_len = ifgr32->ifgr_len;
3053 switch (cmd) {
3054 case SIOCAIFGROUP32:
3055 case SIOCDIFGROUP32:
3056 memcpy(thunk.ifgr.ifgr_group, ifgr32->ifgr_group,
3057 sizeof(thunk.ifgr.ifgr_group));
3058 break;
3059 case SIOCGIFGROUP32:
3060 case SIOCGIFGMEMB32:
3061 thunk.ifgr.ifgr_groups = PTRIN(ifgr32->ifgr_groups);
3062 break;
3063 }
3064 data = (caddr_t)&thunk.ifgr;
3065 cmd = _IOC_NEWTYPE(cmd, struct ifgroupreq);
3066 break;
3067 case SIOCGIFMEDIA32:
3068 case SIOCGIFXMEDIA32:
3069 ifmr32 = (struct ifmediareq32 *)data;
3070 memcpy(thunk.ifmr.ifm_name, ifmr32->ifm_name,
3071 sizeof(thunk.ifmr.ifm_name));
3072 thunk.ifmr.ifm_current = ifmr32->ifm_current;
3073 thunk.ifmr.ifm_mask = ifmr32->ifm_mask;
3074 thunk.ifmr.ifm_status = ifmr32->ifm_status;
3075 thunk.ifmr.ifm_active = ifmr32->ifm_active;
3076 thunk.ifmr.ifm_count = ifmr32->ifm_count;
3077 thunk.ifmr.ifm_ulist = PTRIN(ifmr32->ifm_ulist);
3078 data = (caddr_t)&thunk.ifmr;
3079 cmd = _IOC_NEWTYPE(cmd, struct ifmediareq);
3080 break;
3081 }
3082 #endif
3083
3084 switch (cmd) {
3085 case SIOCGIFCONF:
3086 error = ifconf(cmd, data);
3087 goto out_noref;
3088 }
3089
3090 ifr = (struct ifreq *)data;
3091 switch (cmd) {
3092 #ifdef VIMAGE
3093 case SIOCSIFRVNET:
3094 error = priv_check(td, PRIV_NET_SETIFVNET);
3095 if (error == 0)
3096 error = if_vmove_reclaim(td, ifr->ifr_name,
3097 ifr->ifr_jid);
3098 goto out_noref;
3099 #endif
3100 case SIOCIFCREATE:
3101 case SIOCIFCREATE2:
3102 error = priv_check(td, PRIV_NET_IFCREATE);
3103 if (error == 0)
3104 error = if_clone_create(ifr->ifr_name,
3105 sizeof(ifr->ifr_name), cmd == SIOCIFCREATE2 ?
3106 ifr_data_get_ptr(ifr) : NULL);
3107 goto out_noref;
3108 case SIOCIFDESTROY:
3109 error = priv_check(td, PRIV_NET_IFDESTROY);
3110
3111 if (error == 0) {
3112 sx_xlock(&ifnet_detach_sxlock);
3113 error = if_clone_destroy(ifr->ifr_name);
3114 sx_xunlock(&ifnet_detach_sxlock);
3115 }
3116 goto out_noref;
3117
3118 case SIOCIFGCLONERS:
3119 error = if_clone_list((struct if_clonereq *)data);
3120 goto out_noref;
3121
3122 case SIOCGIFGMEMB:
3123 error = if_getgroupmembers((struct ifgroupreq *)data);
3124 goto out_noref;
3125
3126 #if defined(INET) || defined(INET6)
3127 case SIOCSVH:
3128 case SIOCGVH:
3129 if (carp_ioctl_p == NULL)
3130 error = EPROTONOSUPPORT;
3131 else
3132 error = (*carp_ioctl_p)(ifr, cmd, td);
3133 goto out_noref;
3134 #endif
3135 }
3136
3137 ifp = ifunit_ref(ifr->ifr_name);
3138 if (ifp == NULL) {
3139 error = ENXIO;
3140 goto out_noref;
3141 }
3142
3143 error = ifhwioctl(cmd, ifp, data, td);
3144 if (error != ENOIOCTL)
3145 goto out_ref;
3146
3147 oif_flags = ifp->if_flags;
3148 if (so->so_proto == NULL) {
3149 error = EOPNOTSUPP;
3150 goto out_ref;
3151 }
3152
3153 /*
3154 * Pass the request on to the socket control method, and if the
3155 * latter returns EOPNOTSUPP, directly to the interface.
3156 *
3157 * Make an exception for the legacy SIOCSIF* requests. Drivers
3158 * trust SIOCSIFADDR et al to come from an already privileged
3159 * layer, and do not perform any credentials checks or input
3160 * validation.
3161 */
3162 error = so->so_proto->pr_control(so, cmd, data, ifp, td);
3163 if (error == EOPNOTSUPP && ifp != NULL && ifp->if_ioctl != NULL &&
3164 cmd != SIOCSIFADDR && cmd != SIOCSIFBRDADDR &&
3165 cmd != SIOCSIFDSTADDR && cmd != SIOCSIFNETMASK)
3166 error = (*ifp->if_ioctl)(ifp, cmd, data);
3167
3168 if ((oif_flags ^ ifp->if_flags) & IFF_UP) {
3169 #ifdef INET6
3170 if (ifp->if_flags & IFF_UP)
3171 in6_if_up(ifp);
3172 #endif
3173 }
3174
3175 out_ref:
3176 if_rele(ifp);
3177 out_noref:
3178 CURVNET_RESTORE();
3179 #ifdef COMPAT_FREEBSD32
3180 if (error != 0)
3181 return (error);
3182 switch (saved_cmd) {
3183 case SIOCGIFCONF32:
3184 ifc32->ifc_len = thunk.ifc.ifc_len;
3185 break;
3186 case SIOCGDRVSPEC32:
3187 /*
3188 * SIOCGDRVSPEC is IOWR, but nothing actually touches
3189 * the struct so just assert that ifd_len (the only
3190 * field it might make sense to update) hasn't
3191 * changed.
3192 */
3193 KASSERT(thunk.ifd.ifd_len == ifd32->ifd_len,
3194 ("ifd_len was updated %u -> %zu", ifd32->ifd_len,
3195 thunk.ifd.ifd_len));
3196 break;
3197 case SIOCGIFGROUP32:
3198 case SIOCGIFGMEMB32:
3199 ifgr32->ifgr_len = thunk.ifgr.ifgr_len;
3200 break;
3201 case SIOCGIFMEDIA32:
3202 case SIOCGIFXMEDIA32:
3203 ifmr32->ifm_current = thunk.ifmr.ifm_current;
3204 ifmr32->ifm_mask = thunk.ifmr.ifm_mask;
3205 ifmr32->ifm_status = thunk.ifmr.ifm_status;
3206 ifmr32->ifm_active = thunk.ifmr.ifm_active;
3207 ifmr32->ifm_count = thunk.ifmr.ifm_count;
3208 break;
3209 }
3210 #endif
3211 return (error);
3212 }
3213
3214 /*
3215 * The code common to handling reference counted flags,
3216 * e.g., in ifpromisc() and if_allmulti().
3217 * The "pflag" argument can specify a permanent mode flag to check,
3218 * such as IFF_PPROMISC for promiscuous mode; should be 0 if none.
3219 *
3220 * Only to be used on stack-owned flags, not driver-owned flags.
3221 */
3222 static int
3223 if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch)
3224 {
3225 struct ifreq ifr;
3226 int error;
3227 int oldflags, oldcount;
3228
3229 /* Sanity checks to catch programming errors */
3230 KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0,
3231 ("%s: setting driver-owned flag %d", __func__, flag));
3232
3233 if (onswitch)
3234 KASSERT(*refcount >= 0,
3235 ("%s: increment negative refcount %d for flag %d",
3236 __func__, *refcount, flag));
3237 else
3238 KASSERT(*refcount > 0,
3239 ("%s: decrement non-positive refcount %d for flag %d",
3240 __func__, *refcount, flag));
3241
3242 /* In case this mode is permanent, just touch refcount */
3243 if (ifp->if_flags & pflag) {
3244 *refcount += onswitch ? 1 : -1;
3245 return (0);
3246 }
3247
3248 /* Save ifnet parameters for if_ioctl() may fail */
3249 oldcount = *refcount;
3250 oldflags = ifp->if_flags;
3251
3252 /*
3253 * See if we aren't the only and touching refcount is enough.
3254 * Actually toggle interface flag if we are the first or last.
3255 */
3256 if (onswitch) {
3257 if ((*refcount)++)
3258 return (0);
3259 ifp->if_flags |= flag;
3260 } else {
3261 if (--(*refcount))
3262 return (0);
3263 ifp->if_flags &= ~flag;
3264 }
3265
3266 /* Call down the driver since we've changed interface flags */
3267 if (ifp->if_ioctl == NULL) {
3268 error = EOPNOTSUPP;
3269 goto recover;
3270 }
3271 ifr.ifr_flags = ifp->if_flags & 0xffff;
3272 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3273 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3274 if (error)
3275 goto recover;
3276 /* Notify userland that interface flags have changed */
3277 rt_ifmsg(ifp, flag);
3278 return (0);
3279
3280 recover:
3281 /* Recover after driver error */
3282 *refcount = oldcount;
3283 ifp->if_flags = oldflags;
3284 return (error);
3285 }
3286
3287 /*
3288 * Set/clear promiscuous mode on interface ifp based on the truth value
3289 * of pswitch. The calls are reference counted so that only the first
3290 * "on" request actually has an effect, as does the final "off" request.
3291 * Results are undefined if the "off" and "on" requests are not matched.
3292 */
3293 int
3294 ifpromisc(struct ifnet *ifp, int pswitch)
3295 {
3296 int error;
3297 int oldflags = ifp->if_flags;
3298
3299 error = if_setflag(ifp, IFF_PROMISC, IFF_PPROMISC,
3300 &ifp->if_pcount, pswitch);
3301 /* If promiscuous mode status has changed, log a message */
3302 if (error == 0 && ((ifp->if_flags ^ oldflags) & IFF_PROMISC) &&
3303 log_promisc_mode_change)
3304 if_printf(ifp, "promiscuous mode %s\n",
3305 (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled");
3306 return (error);
3307 }
3308
3309 /*
3310 * Return interface configuration
3311 * of system. List may be used
3312 * in later ioctl's (above) to get
3313 * other information.
3314 */
3315 /*ARGSUSED*/
3316 static int
3317 ifconf(u_long cmd, caddr_t data)
3318 {
3319 struct ifconf *ifc = (struct ifconf *)data;
3320 struct ifnet *ifp;
3321 struct ifaddr *ifa;
3322 struct ifreq ifr;
3323 struct sbuf *sb;
3324 int error, full = 0, valid_len, max_len;
3325
3326 /* Limit initial buffer size to maxphys to avoid DoS from userspace. */
3327 max_len = maxphys - 1;
3328
3329 /* Prevent hostile input from being able to crash the system */
3330 if (ifc->ifc_len <= 0)
3331 return (EINVAL);
3332
3333 again:
3334 if (ifc->ifc_len <= max_len) {
3335 max_len = ifc->ifc_len;
3336 full = 1;
3337 }
3338 sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN);
3339 max_len = 0;
3340 valid_len = 0;
3341
3342 IFNET_RLOCK();
3343 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
3344 struct epoch_tracker et;
3345 int addrs;
3346
3347 /*
3348 * Zero the ifr to make sure we don't disclose the contents
3349 * of the stack.
3350 */
3351 memset(&ifr, 0, sizeof(ifr));
3352
3353 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name))
3354 >= sizeof(ifr.ifr_name)) {
3355 sbuf_delete(sb);
3356 IFNET_RUNLOCK();
3357 return (ENAMETOOLONG);
3358 }
3359
3360 addrs = 0;
3361 NET_EPOCH_ENTER(et);
3362 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
3363 struct sockaddr *sa = ifa->ifa_addr;
3364
3365 if (prison_if(curthread->td_ucred, sa) != 0)
3366 continue;
3367 addrs++;
3368 if (sa->sa_len <= sizeof(*sa)) {
3369 if (sa->sa_len < sizeof(*sa)) {
3370 memset(&ifr.ifr_ifru.ifru_addr, 0,
3371 sizeof(ifr.ifr_ifru.ifru_addr));
3372 memcpy(&ifr.ifr_ifru.ifru_addr, sa,
3373 sa->sa_len);
3374 } else
3375 ifr.ifr_ifru.ifru_addr = *sa;
3376 sbuf_bcat(sb, &ifr, sizeof(ifr));
3377 max_len += sizeof(ifr);
3378 } else {
3379 sbuf_bcat(sb, &ifr,
3380 offsetof(struct ifreq, ifr_addr));
3381 max_len += offsetof(struct ifreq, ifr_addr);
3382 sbuf_bcat(sb, sa, sa->sa_len);
3383 max_len += sa->sa_len;
3384 }
3385
3386 if (sbuf_error(sb) == 0)
3387 valid_len = sbuf_len(sb);
3388 }
3389 NET_EPOCH_EXIT(et);
3390 if (addrs == 0) {
3391 sbuf_bcat(sb, &ifr, sizeof(ifr));
3392 max_len += sizeof(ifr);
3393
3394 if (sbuf_error(sb) == 0)
3395 valid_len = sbuf_len(sb);
3396 }
3397 }
3398 IFNET_RUNLOCK();
3399
3400 /*
3401 * If we didn't allocate enough space (uncommon), try again. If
3402 * we have already allocated as much space as we are allowed,
3403 * return what we've got.
3404 */
3405 if (valid_len != max_len && !full) {
3406 sbuf_delete(sb);
3407 goto again;
3408 }
3409
3410 ifc->ifc_len = valid_len;
3411 sbuf_finish(sb);
3412 error = copyout(sbuf_data(sb), ifc->ifc_req, ifc->ifc_len);
3413 sbuf_delete(sb);
3414 return (error);
3415 }
3416
3417 /*
3418 * Just like ifpromisc(), but for all-multicast-reception mode.
3419 */
3420 int
3421 if_allmulti(struct ifnet *ifp, int onswitch)
3422 {
3423
3424 return (if_setflag(ifp, IFF_ALLMULTI, 0, &ifp->if_amcount, onswitch));
3425 }
3426
3427 struct ifmultiaddr *
3428 if_findmulti(struct ifnet *ifp, const struct sockaddr *sa)
3429 {
3430 struct ifmultiaddr *ifma;
3431
3432 IF_ADDR_LOCK_ASSERT(ifp);
3433
3434 CK_STAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
3435 if (sa->sa_family == AF_LINK) {
3436 if (sa_dl_equal(ifma->ifma_addr, sa))
3437 break;
3438 } else {
3439 if (sa_equal(ifma->ifma_addr, sa))
3440 break;
3441 }
3442 }
3443
3444 return ifma;
3445 }
3446
3447 /*
3448 * Allocate a new ifmultiaddr and initialize based on passed arguments. We
3449 * make copies of passed sockaddrs. The ifmultiaddr will not be added to
3450 * the ifnet multicast address list here, so the caller must do that and
3451 * other setup work (such as notifying the device driver). The reference
3452 * count is initialized to 1.
3453 */
3454 static struct ifmultiaddr *
3455 if_allocmulti(struct ifnet *ifp, struct sockaddr *sa, struct sockaddr *llsa,
3456 int mflags)
3457 {
3458 struct ifmultiaddr *ifma;
3459 struct sockaddr *dupsa;
3460
3461 ifma = malloc(sizeof *ifma, M_IFMADDR, mflags |
3462 M_ZERO);
3463 if (ifma == NULL)
3464 return (NULL);
3465
3466 dupsa = malloc(sa->sa_len, M_IFMADDR, mflags);
3467 if (dupsa == NULL) {
3468 free(ifma, M_IFMADDR);
3469 return (NULL);
3470 }
3471 bcopy(sa, dupsa, sa->sa_len);
3472 ifma->ifma_addr = dupsa;
3473
3474 ifma->ifma_ifp = ifp;
3475 ifma->ifma_refcount = 1;
3476 ifma->ifma_protospec = NULL;
3477
3478 if (llsa == NULL) {
3479 ifma->ifma_lladdr = NULL;
3480 return (ifma);
3481 }
3482
3483 dupsa = malloc(llsa->sa_len, M_IFMADDR, mflags);
3484 if (dupsa == NULL) {
3485 free(ifma->ifma_addr, M_IFMADDR);
3486 free(ifma, M_IFMADDR);
3487 return (NULL);
3488 }
3489 bcopy(llsa, dupsa, llsa->sa_len);
3490 ifma->ifma_lladdr = dupsa;
3491
3492 return (ifma);
3493 }
3494
3495 /*
3496 * if_freemulti: free ifmultiaddr structure and possibly attached related
3497 * addresses. The caller is responsible for implementing reference
3498 * counting, notifying the driver, handling routing messages, and releasing
3499 * any dependent link layer state.
3500 */
3501 #ifdef MCAST_VERBOSE
3502 extern void kdb_backtrace(void);
3503 #endif
3504 static void
3505 if_freemulti_internal(struct ifmultiaddr *ifma)
3506 {
3507
3508 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti: refcount %d",
3509 ifma->ifma_refcount));
3510
3511 if (ifma->ifma_lladdr != NULL)
3512 free(ifma->ifma_lladdr, M_IFMADDR);
3513 #ifdef MCAST_VERBOSE
3514 kdb_backtrace();
3515 printf("%s freeing ifma: %p\n", __func__, ifma);
3516 #endif
3517 free(ifma->ifma_addr, M_IFMADDR);
3518 free(ifma, M_IFMADDR);
3519 }
3520
3521 static void
3522 if_destroymulti(epoch_context_t ctx)
3523 {
3524 struct ifmultiaddr *ifma;
3525
3526 ifma = __containerof(ctx, struct ifmultiaddr, ifma_epoch_ctx);
3527 if_freemulti_internal(ifma);
3528 }
3529
3530 void
3531 if_freemulti(struct ifmultiaddr *ifma)
3532 {
3533 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti_epoch: refcount %d",
3534 ifma->ifma_refcount));
3535
3536 NET_EPOCH_CALL(if_destroymulti, &ifma->ifma_epoch_ctx);
3537 }
3538
3539 /*
3540 * Register an additional multicast address with a network interface.
3541 *
3542 * - If the address is already present, bump the reference count on the
3543 * address and return.
3544 * - If the address is not link-layer, look up a link layer address.
3545 * - Allocate address structures for one or both addresses, and attach to the
3546 * multicast address list on the interface. If automatically adding a link
3547 * layer address, the protocol address will own a reference to the link
3548 * layer address, to be freed when it is freed.
3549 * - Notify the network device driver of an addition to the multicast address
3550 * list.
3551 *
3552 * 'sa' points to caller-owned memory with the desired multicast address.
3553 *
3554 * 'retifma' will be used to return a pointer to the resulting multicast
3555 * address reference, if desired.
3556 */
3557 int
3558 if_addmulti(struct ifnet *ifp, struct sockaddr *sa,
3559 struct ifmultiaddr **retifma)
3560 {
3561 struct ifmultiaddr *ifma, *ll_ifma;
3562 struct sockaddr *llsa;
3563 struct sockaddr_dl sdl;
3564 int error;
3565
3566 #ifdef INET
3567 IN_MULTI_LIST_UNLOCK_ASSERT();
3568 #endif
3569 #ifdef INET6
3570 IN6_MULTI_LIST_UNLOCK_ASSERT();
3571 #endif
3572 /*
3573 * If the address is already present, return a new reference to it;
3574 * otherwise, allocate storage and set up a new address.
3575 */
3576 IF_ADDR_WLOCK(ifp);
3577 ifma = if_findmulti(ifp, sa);
3578 if (ifma != NULL) {
3579 ifma->ifma_refcount++;
3580 if (retifma != NULL)
3581 *retifma = ifma;
3582 IF_ADDR_WUNLOCK(ifp);
3583 return (0);
3584 }
3585
3586 /*
3587 * The address isn't already present; resolve the protocol address
3588 * into a link layer address, and then look that up, bump its
3589 * refcount or allocate an ifma for that also.
3590 * Most link layer resolving functions returns address data which
3591 * fits inside default sockaddr_dl structure. However callback
3592 * can allocate another sockaddr structure, in that case we need to
3593 * free it later.
3594 */
3595 llsa = NULL;
3596 ll_ifma = NULL;
3597 if (ifp->if_resolvemulti != NULL) {
3598 /* Provide called function with buffer size information */
3599 sdl.sdl_len = sizeof(sdl);
3600 llsa = (struct sockaddr *)&sdl;
3601 error = ifp->if_resolvemulti(ifp, &llsa, sa);
3602 if (error)
3603 goto unlock_out;
3604 }
3605
3606 /*
3607 * Allocate the new address. Don't hook it up yet, as we may also
3608 * need to allocate a link layer multicast address.
3609 */
3610 ifma = if_allocmulti(ifp, sa, llsa, M_NOWAIT);
3611 if (ifma == NULL) {
3612 error = ENOMEM;
3613 goto free_llsa_out;
3614 }
3615
3616 /*
3617 * If a link layer address is found, we'll need to see if it's
3618 * already present in the address list, or allocate is as well.
3619 * When this block finishes, the link layer address will be on the
3620 * list.
3621 */
3622 if (llsa != NULL) {
3623 ll_ifma = if_findmulti(ifp, llsa);
3624 if (ll_ifma == NULL) {
3625 ll_ifma = if_allocmulti(ifp, llsa, NULL, M_NOWAIT);
3626 if (ll_ifma == NULL) {
3627 --ifma->ifma_refcount;
3628 if_freemulti(ifma);
3629 error = ENOMEM;
3630 goto free_llsa_out;
3631 }
3632 ll_ifma->ifma_flags |= IFMA_F_ENQUEUED;
3633 CK_STAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ll_ifma,
3634 ifma_link);
3635 } else
3636 ll_ifma->ifma_refcount++;
3637 ifma->ifma_llifma = ll_ifma;
3638 }
3639
3640 /*
3641 * We now have a new multicast address, ifma, and possibly a new or
3642 * referenced link layer address. Add the primary address to the
3643 * ifnet address list.
3644 */
3645 ifma->ifma_flags |= IFMA_F_ENQUEUED;
3646 CK_STAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
3647
3648 if (retifma != NULL)
3649 *retifma = ifma;
3650
3651 /*
3652 * Must generate the message while holding the lock so that 'ifma'
3653 * pointer is still valid.
3654 */
3655 rt_newmaddrmsg(RTM_NEWMADDR, ifma);
3656 IF_ADDR_WUNLOCK(ifp);
3657
3658 /*
3659 * We are certain we have added something, so call down to the
3660 * interface to let them know about it.
3661 */
3662 if (ifp->if_ioctl != NULL) {
3663 if (THREAD_CAN_SLEEP())
3664 (void )(*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0);
3665 else
3666 taskqueue_enqueue(taskqueue_swi, &ifp->if_addmultitask);
3667 }
3668
3669 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl))
3670 link_free_sdl(llsa);
3671
3672 return (0);
3673
3674 free_llsa_out:
3675 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl))
3676 link_free_sdl(llsa);
3677
3678 unlock_out:
3679 IF_ADDR_WUNLOCK(ifp);
3680 return (error);
3681 }
3682
3683 static void
3684 if_siocaddmulti(void *arg, int pending)
3685 {
3686 struct ifnet *ifp;
3687
3688 ifp = arg;
3689 #ifdef DIAGNOSTIC
3690 if (pending > 1)
3691 if_printf(ifp, "%d SIOCADDMULTI coalesced\n", pending);
3692 #endif
3693 CURVNET_SET(ifp->if_vnet);
3694 (void )(*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0);
3695 CURVNET_RESTORE();
3696 }
3697
3698 /*
3699 * Delete a multicast group membership by network-layer group address.
3700 *
3701 * Returns ENOENT if the entry could not be found. If ifp no longer
3702 * exists, results are undefined. This entry point should only be used
3703 * from subsystems which do appropriate locking to hold ifp for the
3704 * duration of the call.
3705 * Network-layer protocol domains must use if_delmulti_ifma().
3706 */
3707 int
3708 if_delmulti(struct ifnet *ifp, struct sockaddr *sa)
3709 {
3710 struct ifmultiaddr *ifma;
3711 int lastref;
3712
3713 KASSERT(ifp, ("%s: NULL ifp", __func__));
3714
3715 IF_ADDR_WLOCK(ifp);
3716 lastref = 0;
3717 ifma = if_findmulti(ifp, sa);
3718 if (ifma != NULL)
3719 lastref = if_delmulti_locked(ifp, ifma, 0);
3720 IF_ADDR_WUNLOCK(ifp);
3721
3722 if (ifma == NULL)
3723 return (ENOENT);
3724
3725 if (lastref && ifp->if_ioctl != NULL) {
3726 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
3727 }
3728
3729 return (0);
3730 }
3731
3732 /*
3733 * Delete all multicast group membership for an interface.
3734 * Should be used to quickly flush all multicast filters.
3735 */
3736 void
3737 if_delallmulti(struct ifnet *ifp)
3738 {
3739 struct ifmultiaddr *ifma;
3740 struct ifmultiaddr *next;
3741
3742 IF_ADDR_WLOCK(ifp);
3743 CK_STAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next)
3744 if_delmulti_locked(ifp, ifma, 0);
3745 IF_ADDR_WUNLOCK(ifp);
3746 }
3747
3748 void
3749 if_delmulti_ifma(struct ifmultiaddr *ifma)
3750 {
3751 if_delmulti_ifma_flags(ifma, 0);
3752 }
3753
3754 /*
3755 * Delete a multicast group membership by group membership pointer.
3756 * Network-layer protocol domains must use this routine.
3757 *
3758 * It is safe to call this routine if the ifp disappeared.
3759 */
3760 void
3761 if_delmulti_ifma_flags(struct ifmultiaddr *ifma, int flags)
3762 {
3763 struct ifnet *ifp;
3764 int lastref;
3765 MCDPRINTF("%s freeing ifma: %p\n", __func__, ifma);
3766 #ifdef INET
3767 IN_MULTI_LIST_UNLOCK_ASSERT();
3768 #endif
3769 ifp = ifma->ifma_ifp;
3770 #ifdef DIAGNOSTIC
3771 if (ifp == NULL) {
3772 printf("%s: ifma_ifp seems to be detached\n", __func__);
3773 } else {
3774 struct epoch_tracker et;
3775 struct ifnet *oifp;
3776
3777 NET_EPOCH_ENTER(et);
3778 CK_STAILQ_FOREACH(oifp, &V_ifnet, if_link)
3779 if (ifp == oifp)
3780 break;
3781 NET_EPOCH_EXIT(et);
3782 if (ifp != oifp)
3783 ifp = NULL;
3784 }
3785 #endif
3786 /*
3787 * If and only if the ifnet instance exists: Acquire the address lock.
3788 */
3789 if (ifp != NULL)
3790 IF_ADDR_WLOCK(ifp);
3791
3792 lastref = if_delmulti_locked(ifp, ifma, flags);
3793
3794 if (ifp != NULL) {
3795 /*
3796 * If and only if the ifnet instance exists:
3797 * Release the address lock.
3798 * If the group was left: update the hardware hash filter.
3799 */
3800 IF_ADDR_WUNLOCK(ifp);
3801 if (lastref && ifp->if_ioctl != NULL) {
3802 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
3803 }
3804 }
3805 }
3806
3807 /*
3808 * Perform deletion of network-layer and/or link-layer multicast address.
3809 *
3810 * Return 0 if the reference count was decremented.
3811 * Return 1 if the final reference was released, indicating that the
3812 * hardware hash filter should be reprogrammed.
3813 */
3814 static int
3815 if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching)
3816 {
3817 struct ifmultiaddr *ll_ifma;
3818
3819 if (ifp != NULL && ifma->ifma_ifp != NULL) {
3820 KASSERT(ifma->ifma_ifp == ifp,
3821 ("%s: inconsistent ifp %p", __func__, ifp));
3822 IF_ADDR_WLOCK_ASSERT(ifp);
3823 }
3824
3825 ifp = ifma->ifma_ifp;
3826 MCDPRINTF("%s freeing %p from %s \n", __func__, ifma, ifp ? ifp->if_xname : "");
3827
3828 /*
3829 * If the ifnet is detaching, null out references to ifnet,
3830 * so that upper protocol layers will notice, and not attempt
3831 * to obtain locks for an ifnet which no longer exists. The
3832 * routing socket announcement must happen before the ifnet
3833 * instance is detached from the system.
3834 */
3835 if (detaching) {
3836 #ifdef DIAGNOSTIC
3837 printf("%s: detaching ifnet instance %p\n", __func__, ifp);
3838 #endif
3839 /*
3840 * ifp may already be nulled out if we are being reentered
3841 * to delete the ll_ifma.
3842 */
3843 if (ifp != NULL) {
3844 rt_newmaddrmsg(RTM_DELMADDR, ifma);
3845 ifma->ifma_ifp = NULL;
3846 }
3847 }
3848
3849 if (--ifma->ifma_refcount > 0)
3850 return 0;
3851
3852 if (ifp != NULL && detaching == 0 && (ifma->ifma_flags & IFMA_F_ENQUEUED)) {
3853 CK_STAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifmultiaddr, ifma_link);
3854 ifma->ifma_flags &= ~IFMA_F_ENQUEUED;
3855 }
3856 /*
3857 * If this ifma is a network-layer ifma, a link-layer ifma may
3858 * have been associated with it. Release it first if so.
3859 */
3860 ll_ifma = ifma->ifma_llifma;
3861 if (ll_ifma != NULL) {
3862 KASSERT(ifma->ifma_lladdr != NULL,
3863 ("%s: llifma w/o lladdr", __func__));
3864 if (detaching)
3865 ll_ifma->ifma_ifp = NULL; /* XXX */
3866 if (--ll_ifma->ifma_refcount == 0) {
3867 if (ifp != NULL) {
3868 if (ll_ifma->ifma_flags & IFMA_F_ENQUEUED) {
3869 CK_STAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma, ifmultiaddr,
3870 ifma_link);
3871 ll_ifma->ifma_flags &= ~IFMA_F_ENQUEUED;
3872 }
3873 }
3874 if_freemulti(ll_ifma);
3875 }
3876 }
3877 #ifdef INVARIANTS
3878 if (ifp) {
3879 struct ifmultiaddr *ifmatmp;
3880
3881 CK_STAILQ_FOREACH(ifmatmp, &ifp->if_multiaddrs, ifma_link)
3882 MPASS(ifma != ifmatmp);
3883 }
3884 #endif
3885 if_freemulti(ifma);
3886 /*
3887 * The last reference to this instance of struct ifmultiaddr
3888 * was released; the hardware should be notified of this change.
3889 */
3890 return 1;
3891 }
3892
3893 /*
3894 * Set the link layer address on an interface.
3895 *
3896 * At this time we only support certain types of interfaces,
3897 * and we don't allow the length of the address to change.
3898 *
3899 * Set noinline to be dtrace-friendly
3900 */
3901 __noinline int
3902 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len)
3903 {
3904 struct sockaddr_dl *sdl;
3905 struct ifaddr *ifa;
3906 struct ifreq ifr;
3907
3908 ifa = ifp->if_addr;
3909 if (ifa == NULL)
3910 return (EINVAL);
3911
3912 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
3913 if (sdl == NULL)
3914 return (EINVAL);
3915
3916 if (len != sdl->sdl_alen) /* don't allow length to change */
3917 return (EINVAL);
3918
3919 switch (ifp->if_type) {
3920 case IFT_ETHER:
3921 case IFT_XETHER:
3922 case IFT_L2VLAN:
3923 case IFT_BRIDGE:
3924 case IFT_IEEE8023ADLAG:
3925 bcopy(lladdr, LLADDR(sdl), len);
3926 break;
3927 default:
3928 return (ENODEV);
3929 }
3930
3931 /*
3932 * If the interface is already up, we need
3933 * to re-init it in order to reprogram its
3934 * address filter.
3935 */
3936 if ((ifp->if_flags & IFF_UP) != 0) {
3937 if (ifp->if_ioctl) {
3938 ifp->if_flags &= ~IFF_UP;
3939 ifr.ifr_flags = ifp->if_flags & 0xffff;
3940 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3941 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3942 ifp->if_flags |= IFF_UP;
3943 ifr.ifr_flags = ifp->if_flags & 0xffff;
3944 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3945 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3946 }
3947 }
3948 EVENTHANDLER_INVOKE(iflladdr_event, ifp);
3949
3950 return (0);
3951 }
3952
3953 /*
3954 * Compat function for handling basic encapsulation requests.
3955 * Not converted stacks (FDDI, IB, ..) supports traditional
3956 * output model: ARP (and other similar L2 protocols) are handled
3957 * inside output routine, arpresolve/nd6_resolve() returns MAC
3958 * address instead of full prepend.
3959 *
3960 * This function creates calculated header==MAC for IPv4/IPv6 and
3961 * returns EAFNOSUPPORT (which is then handled in ARP code) for other
3962 * address families.
3963 */
3964 static int
3965 if_requestencap_default(struct ifnet *ifp, struct if_encap_req *req)
3966 {
3967
3968 if (req->rtype != IFENCAP_LL)
3969 return (EOPNOTSUPP);
3970
3971 if (req->bufsize < req->lladdr_len)
3972 return (ENOMEM);
3973
3974 switch (req->family) {
3975 case AF_INET:
3976 case AF_INET6:
3977 break;
3978 default:
3979 return (EAFNOSUPPORT);
3980 }
3981
3982 /* Copy lladdr to storage as is */
3983 memmove(req->buf, req->lladdr, req->lladdr_len);
3984 req->bufsize = req->lladdr_len;
3985 req->lladdr_off = 0;
3986
3987 return (0);
3988 }
3989
3990 /*
3991 * Tunnel interfaces can nest, also they may cause infinite recursion
3992 * calls when misconfigured. We'll prevent this by detecting loops.
3993 * High nesting level may cause stack exhaustion. We'll prevent this
3994 * by introducing upper limit.
3995 *
3996 * Return 0, if tunnel nesting count is equal or less than limit.
3997 */
3998 int
3999 if_tunnel_check_nesting(struct ifnet *ifp, struct mbuf *m, uint32_t cookie,
4000 int limit)
4001 {
4002 struct m_tag *mtag;
4003 int count;
4004
4005 count = 1;
4006 mtag = NULL;
4007 while ((mtag = m_tag_locate(m, cookie, 0, mtag)) != NULL) {
4008 if (*(struct ifnet **)(mtag + 1) == ifp) {
4009 log(LOG_NOTICE, "%s: loop detected\n", if_name(ifp));
4010 return (EIO);
4011 }
4012 count++;
4013 }
4014 if (count > limit) {
4015 log(LOG_NOTICE,
4016 "%s: if_output recursively called too many times(%d)\n",
4017 if_name(ifp), count);
4018 return (EIO);
4019 }
4020 mtag = m_tag_alloc(cookie, 0, sizeof(struct ifnet *), M_NOWAIT);
4021 if (mtag == NULL)
4022 return (ENOMEM);
4023 *(struct ifnet **)(mtag + 1) = ifp;
4024 m_tag_prepend(m, mtag);
4025 return (0);
4026 }
4027
4028 /*
4029 * Get the link layer address that was read from the hardware at attach.
4030 *
4031 * This is only set by Ethernet NICs (IFT_ETHER), but laggX interfaces re-type
4032 * their component interfaces as IFT_IEEE8023ADLAG.
4033 */
4034 int
4035 if_gethwaddr(struct ifnet *ifp, struct ifreq *ifr)
4036 {
4037
4038 if (ifp->if_hw_addr == NULL)
4039 return (ENODEV);
4040
4041 switch (ifp->if_type) {
4042 case IFT_ETHER:
4043 case IFT_IEEE8023ADLAG:
4044 bcopy(ifp->if_hw_addr, ifr->ifr_addr.sa_data, ifp->if_addrlen);
4045 return (0);
4046 default:
4047 return (ENODEV);
4048 }
4049 }
4050
4051 /*
4052 * The name argument must be a pointer to storage which will last as
4053 * long as the interface does. For physical devices, the result of
4054 * device_get_name(dev) is a good choice and for pseudo-devices a
4055 * static string works well.
4056 */
4057 void
4058 if_initname(struct ifnet *ifp, const char *name, int unit)
4059 {
4060 ifp->if_dname = name;
4061 ifp->if_dunit = unit;
4062 if (unit != IF_DUNIT_NONE)
4063 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit);
4064 else
4065 strlcpy(ifp->if_xname, name, IFNAMSIZ);
4066 }
4067
4068 static int
4069 if_vlog(struct ifnet *ifp, int pri, const char *fmt, va_list ap)
4070 {
4071 char if_fmt[256];
4072
4073 snprintf(if_fmt, sizeof(if_fmt), "%s: %s", ifp->if_xname, fmt);
4074 vlog(pri, if_fmt, ap);
4075 return (0);
4076 }
4077
4078
4079 int
4080 if_printf(struct ifnet *ifp, const char *fmt, ...)
4081 {
4082 va_list ap;
4083
4084 va_start(ap, fmt);
4085 if_vlog(ifp, LOG_INFO, fmt, ap);
4086 va_end(ap);
4087 return (0);
4088 }
4089
4090 int
4091 if_log(struct ifnet *ifp, int pri, const char *fmt, ...)
4092 {
4093 va_list ap;
4094
4095 va_start(ap, fmt);
4096 if_vlog(ifp, pri, fmt, ap);
4097 va_end(ap);
4098 return (0);
4099 }
4100
4101 void
4102 if_start(struct ifnet *ifp)
4103 {
4104
4105 (*(ifp)->if_start)(ifp);
4106 }
4107
4108 /*
4109 * Backwards compatibility interface for drivers
4110 * that have not implemented it
4111 */
4112 static int
4113 if_transmit_default(struct ifnet *ifp, struct mbuf *m)
4114 {
4115 int error;
4116
4117 IFQ_HANDOFF(ifp, m, error);
4118 return (error);
4119 }
4120
4121 static void
4122 if_input_default(struct ifnet *ifp __unused, struct mbuf *m)
4123 {
4124
4125 m_freem(m);
4126 }
4127
4128 int
4129 if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust)
4130 {
4131 int active = 0;
4132
4133 IF_LOCK(ifq);
4134 if (_IF_QFULL(ifq)) {
4135 IF_UNLOCK(ifq);
4136 if_inc_counter(ifp, IFCOUNTER_OQDROPS, 1);
4137 m_freem(m);
4138 return (0);
4139 }
4140 if (ifp != NULL) {
4141 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len + adjust);
4142 if (m->m_flags & (M_BCAST|M_MCAST))
4143 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1);
4144 active = ifp->if_drv_flags & IFF_DRV_OACTIVE;
4145 }
4146 _IF_ENQUEUE(ifq, m);
4147 IF_UNLOCK(ifq);
4148 if (ifp != NULL && !active)
4149 (*(ifp)->if_start)(ifp);
4150 return (1);
4151 }
4152
4153 void
4154 if_register_com_alloc(u_char type,
4155 if_com_alloc_t *a, if_com_free_t *f)
4156 {
4157
4158 KASSERT(if_com_alloc[type] == NULL,
4159 ("if_register_com_alloc: %d already registered", type));
4160 KASSERT(if_com_free[type] == NULL,
4161 ("if_register_com_alloc: %d free already registered", type));
4162
4163 if_com_alloc[type] = a;
4164 if_com_free[type] = f;
4165 }
4166
4167 void
4168 if_deregister_com_alloc(u_char type)
4169 {
4170
4171 KASSERT(if_com_alloc[type] != NULL,
4172 ("if_deregister_com_alloc: %d not registered", type));
4173 KASSERT(if_com_free[type] != NULL,
4174 ("if_deregister_com_alloc: %d free not registered", type));
4175
4176 /*
4177 * Ensure all pending EPOCH(9) callbacks have been executed. This
4178 * fixes issues about late invocation of if_destroy(), which leads
4179 * to memory leak from if_com_alloc[type] allocated if_l2com.
4180 */
4181 NET_EPOCH_DRAIN_CALLBACKS();
4182
4183 if_com_alloc[type] = NULL;
4184 if_com_free[type] = NULL;
4185 }
4186
4187 /* API for driver access to network stack owned ifnet.*/
4188 uint64_t
4189 if_setbaudrate(struct ifnet *ifp, uint64_t baudrate)
4190 {
4191 uint64_t oldbrate;
4192
4193 oldbrate = ifp->if_baudrate;
4194 ifp->if_baudrate = baudrate;
4195 return (oldbrate);
4196 }
4197
4198 uint64_t
4199 if_getbaudrate(const if_t ifp)
4200 {
4201
4202 return (((struct ifnet *)ifp)->if_baudrate);
4203 }
4204
4205 int
4206 if_setcapabilities(if_t ifp, int capabilities)
4207 {
4208 ((struct ifnet *)ifp)->if_capabilities = capabilities;
4209 return (0);
4210 }
4211
4212 int
4213 if_setcapabilitiesbit(if_t ifp, int setbit, int clearbit)
4214 {
4215 ((struct ifnet *)ifp)->if_capabilities &= ~clearbit;
4216 ((struct ifnet *)ifp)->if_capabilities |= setbit;
4217
4218 return (0);
4219 }
4220
4221 int
4222 if_getcapabilities(const if_t ifp)
4223 {
4224 return ((struct ifnet *)ifp)->if_capabilities;
4225 }
4226
4227 int
4228 if_setcapenable(if_t ifp, int capabilities)
4229 {
4230 ((struct ifnet *)ifp)->if_capenable = capabilities;
4231 return (0);
4232 }
4233
4234 int
4235 if_setcapenablebit(if_t ifp, int setcap, int clearcap)
4236 {
4237 if(clearcap)
4238 ((struct ifnet *)ifp)->if_capenable &= ~clearcap;
4239 if(setcap)
4240 ((struct ifnet *)ifp)->if_capenable |= setcap;
4241
4242 return (0);
4243 }
4244
4245 const char *
4246 if_getdname(const if_t ifp)
4247 {
4248 return ((struct ifnet *)ifp)->if_dname;
4249 }
4250
4251 void
4252 if_setdname(if_t ifp, const char *dname)
4253 {
4254 ((struct ifnet *)ifp)->if_dname = dname;
4255 }
4256
4257 const char *
4258 if_name(if_t ifp)
4259 {
4260 return ((struct ifnet *)ifp)->if_xname;
4261 }
4262
4263 int
4264 if_setname(if_t ifp, const char *name)
4265 {
4266 if (strlen(name) > sizeof(ifp->if_xname) - 1)
4267 return (ENAMETOOLONG);
4268 strlcpy(ifp->if_xname, name, sizeof(ifp->if_xname));
4269
4270 return (0);
4271 }
4272
4273 int
4274 if_togglecapenable(if_t ifp, int togglecap)
4275 {
4276 ((struct ifnet *)ifp)->if_capenable ^= togglecap;
4277 return (0);
4278 }
4279
4280 int
4281 if_getcapenable(const if_t ifp)
4282 {
4283 return ((struct ifnet *)ifp)->if_capenable;
4284 }
4285
4286 int
4287 if_getdunit(const if_t ifp)
4288 {
4289 return ((struct ifnet *)ifp)->if_dunit;
4290 }
4291
4292 int
4293 if_getindex(const if_t ifp)
4294 {
4295 return ((struct ifnet *)ifp)->if_index;
4296 }
4297
4298 void
4299 if_setdescr(if_t ifp, char *descrbuf)
4300 {
4301 sx_xlock(&ifdescr_sx);
4302 char *odescrbuf = ifp->if_description;
4303 ifp->if_description = descrbuf;
4304 sx_xunlock(&ifdescr_sx);
4305
4306 if_freedescr(odescrbuf);
4307 }
4308
4309 char *
4310 if_allocdescr(size_t sz, int malloc_flag)
4311 {
4312 malloc_flag &= (M_WAITOK | M_NOWAIT);
4313 return (malloc(sz, M_IFDESCR, M_ZERO | malloc_flag));
4314 }
4315
4316 void
4317 if_freedescr(char *descrbuf)
4318 {
4319 free(descrbuf, M_IFDESCR);
4320 }
4321
4322 int
4323 if_getalloctype(const if_t ifp)
4324 {
4325 return ((struct ifnet *)ifp)->if_alloctype;
4326 }
4327
4328 /*
4329 * This is largely undesirable because it ties ifnet to a device, but does
4330 * provide flexiblity for an embedded product vendor. Should be used with
4331 * the understanding that it violates the interface boundaries, and should be
4332 * a last resort only.
4333 */
4334 int
4335 if_setdev(if_t ifp, void *dev)
4336 {
4337 return (0);
4338 }
4339
4340 int
4341 if_setdrvflagbits(if_t ifp, int set_flags, int clear_flags)
4342 {
4343 ((struct ifnet *)ifp)->if_drv_flags &= ~clear_flags;
4344 ((struct ifnet *)ifp)->if_drv_flags |= set_flags;
4345
4346 return (0);
4347 }
4348
4349 int
4350 if_getdrvflags(const if_t ifp)
4351 {
4352 return ((struct ifnet *)ifp)->if_drv_flags;
4353 }
4354
4355 int
4356 if_setdrvflags(if_t ifp, int flags)
4357 {
4358 ((struct ifnet *)ifp)->if_drv_flags = flags;
4359 return (0);
4360 }
4361
4362 int
4363 if_setflags(if_t ifp, int flags)
4364 {
4365
4366 ifp->if_flags = flags;
4367 return (0);
4368 }
4369
4370 int
4371 if_setflagbits(if_t ifp, int set, int clear)
4372 {
4373 ((struct ifnet *)ifp)->if_flags &= ~clear;
4374 ((struct ifnet *)ifp)->if_flags |= set;
4375
4376 return (0);
4377 }
4378
4379 int
4380 if_getflags(const if_t ifp)
4381 {
4382 return ((struct ifnet *)ifp)->if_flags;
4383 }
4384
4385 int
4386 if_clearhwassist(if_t ifp)
4387 {
4388 ((struct ifnet *)ifp)->if_hwassist = 0;
4389 return (0);
4390 }
4391
4392 int
4393 if_sethwassistbits(if_t ifp, int toset, int toclear)
4394 {
4395 ((struct ifnet *)ifp)->if_hwassist &= ~toclear;
4396 ((struct ifnet *)ifp)->if_hwassist |= toset;
4397
4398 return (0);
4399 }
4400
4401 int
4402 if_sethwassist(if_t ifp, int hwassist_bit)
4403 {
4404 ((struct ifnet *)ifp)->if_hwassist = hwassist_bit;
4405 return (0);
4406 }
4407
4408 int
4409 if_gethwassist(const if_t ifp)
4410 {
4411 return ((struct ifnet *)ifp)->if_hwassist;
4412 }
4413
4414 int
4415 if_togglehwassist(if_t ifp, int toggle_bits)
4416 {
4417 ((struct ifnet *)ifp)->if_hwassist ^= toggle_bits;
4418 return (0);
4419 }
4420
4421 int
4422 if_setmtu(if_t ifp, int mtu)
4423 {
4424 ((struct ifnet *)ifp)->if_mtu = mtu;
4425 return (0);
4426 }
4427
4428 int
4429 if_getmtu(const if_t ifp)
4430 {
4431 return ((struct ifnet *)ifp)->if_mtu;
4432 }
4433
4434 int
4435 if_getmtu_family(const if_t ifp, int family)
4436 {
4437 struct domain *dp;
4438
4439 SLIST_FOREACH(dp, &domains, dom_next) {
4440 if (dp->dom_family == family && dp->dom_ifmtu != NULL)
4441 return (dp->dom_ifmtu((struct ifnet *)ifp));
4442 }
4443
4444 return (((struct ifnet *)ifp)->if_mtu);
4445 }
4446
4447 /*
4448 * Methods for drivers to access interface unicast and multicast
4449 * link level addresses. Driver shall not know 'struct ifaddr' neither
4450 * 'struct ifmultiaddr'.
4451 */
4452 u_int
4453 if_lladdr_count(if_t ifp)
4454 {
4455 struct epoch_tracker et;
4456 struct ifaddr *ifa;
4457 u_int count;
4458
4459 count = 0;
4460 NET_EPOCH_ENTER(et);
4461 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
4462 if (ifa->ifa_addr->sa_family == AF_LINK)
4463 count++;
4464 NET_EPOCH_EXIT(et);
4465
4466 return (count);
4467 }
4468
4469 u_int
4470 if_foreach_lladdr(if_t ifp, iflladdr_cb_t cb, void *cb_arg)
4471 {
4472 struct epoch_tracker et;
4473 struct ifaddr *ifa;
4474 u_int count;
4475
4476 MPASS(cb);
4477
4478 count = 0;
4479 NET_EPOCH_ENTER(et);
4480 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
4481 if (ifa->ifa_addr->sa_family != AF_LINK)
4482 continue;
4483 count += (*cb)(cb_arg, (struct sockaddr_dl *)ifa->ifa_addr,
4484 count);
4485 }
4486 NET_EPOCH_EXIT(et);
4487
4488 return (count);
4489 }
4490
4491 u_int
4492 if_llmaddr_count(if_t ifp)
4493 {
4494 struct epoch_tracker et;
4495 struct ifmultiaddr *ifma;
4496 int count;
4497
4498 count = 0;
4499 NET_EPOCH_ENTER(et);
4500 CK_STAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
4501 if (ifma->ifma_addr->sa_family == AF_LINK)
4502 count++;
4503 NET_EPOCH_EXIT(et);
4504
4505 return (count);
4506 }
4507
4508 u_int
4509 if_foreach_llmaddr(if_t ifp, iflladdr_cb_t cb, void *cb_arg)
4510 {
4511 struct epoch_tracker et;
4512 struct ifmultiaddr *ifma;
4513 u_int count;
4514
4515 MPASS(cb);
4516
4517 count = 0;
4518 NET_EPOCH_ENTER(et);
4519 CK_STAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
4520 if (ifma->ifma_addr->sa_family != AF_LINK)
4521 continue;
4522 count += (*cb)(cb_arg, (struct sockaddr_dl *)ifma->ifma_addr,
4523 count);
4524 }
4525 NET_EPOCH_EXIT(et);
4526
4527 return (count);
4528 }
4529
4530 u_int
4531 if_foreach_addr_type(if_t ifp, int type, if_addr_cb_t cb, void *cb_arg)
4532 {
4533 struct epoch_tracker et;
4534 struct ifaddr *ifa;
4535 u_int count;
4536
4537 MPASS(cb);
4538
4539 count = 0;
4540 NET_EPOCH_ENTER(et);
4541 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
4542 if (ifa->ifa_addr->sa_family != type)
4543 continue;
4544 count += (*cb)(cb_arg, ifa, count);
4545 }
4546 NET_EPOCH_EXIT(et);
4547
4548 return (count);
4549 }
4550
4551 int
4552 if_setsoftc(if_t ifp, void *softc)
4553 {
4554 ((struct ifnet *)ifp)->if_softc = softc;
4555 return (0);
4556 }
4557
4558 void *
4559 if_getsoftc(const if_t ifp)
4560 {
4561 return ((struct ifnet *)ifp)->if_softc;
4562 }
4563
4564 void
4565 if_setrcvif(struct mbuf *m, if_t ifp)
4566 {
4567
4568 MPASS((m->m_pkthdr.csum_flags & CSUM_SND_TAG) == 0);
4569 m->m_pkthdr.rcvif = (struct ifnet *)ifp;
4570 }
4571
4572 void
4573 if_setvtag(struct mbuf *m, uint16_t tag)
4574 {
4575 m->m_pkthdr.ether_vtag = tag;
4576 }
4577
4578 uint16_t
4579 if_getvtag(struct mbuf *m)
4580 {
4581
4582 return (m->m_pkthdr.ether_vtag);
4583 }
4584
4585 int
4586 if_sendq_empty(if_t ifp)
4587 {
4588 return IFQ_DRV_IS_EMPTY(&((struct ifnet *)ifp)->if_snd);
4589 }
4590
4591 struct ifaddr *
4592 if_getifaddr(const if_t ifp)
4593 {
4594 return ((struct ifnet *)ifp)->if_addr;
4595 }
4596
4597 int
4598 if_getamcount(const if_t ifp)
4599 {
4600 return ((struct ifnet *)ifp)->if_amcount;
4601 }
4602
4603 int
4604 if_setsendqready(if_t ifp)
4605 {
4606 IFQ_SET_READY(&((struct ifnet *)ifp)->if_snd);
4607 return (0);
4608 }
4609
4610 int
4611 if_setsendqlen(if_t ifp, int tx_desc_count)
4612 {
4613 IFQ_SET_MAXLEN(&((struct ifnet *)ifp)->if_snd, tx_desc_count);
4614 ((struct ifnet *)ifp)->if_snd.ifq_drv_maxlen = tx_desc_count;
4615
4616 return (0);
4617 }
4618
4619 int
4620 if_vlantrunkinuse(if_t ifp)
4621 {
4622 return ((struct ifnet *)ifp)->if_vlantrunk != NULL?1:0;
4623 }
4624
4625 int
4626 if_init(if_t ifp, void *ctx)
4627 {
4628 (*((struct ifnet *)ifp)->if_init)(ctx);
4629 return (0);
4630 }
4631
4632 int
4633 if_input(if_t ifp, struct mbuf* sendmp)
4634 {
4635 (*((struct ifnet *)ifp)->if_input)((struct ifnet *)ifp, sendmp);
4636 return (0);
4637
4638 }
4639
4640 int
4641 if_transmit(if_t ifp, struct mbuf *m)
4642 {
4643 (*((struct ifnet *)ifp)->if_transmit)((struct ifnet *)ifp, m);
4644 return (0);
4645 }
4646
4647 struct mbuf *
4648 if_dequeue(if_t ifp)
4649 {
4650 struct mbuf *m;
4651 IFQ_DRV_DEQUEUE(&((struct ifnet *)ifp)->if_snd, m);
4652
4653 return (m);
4654 }
4655
4656 int
4657 if_sendq_prepend(if_t ifp, struct mbuf *m)
4658 {
4659 IFQ_DRV_PREPEND(&((struct ifnet *)ifp)->if_snd, m);
4660 return (0);
4661 }
4662
4663 int
4664 if_setifheaderlen(if_t ifp, int len)
4665 {
4666 ((struct ifnet *)ifp)->if_hdrlen = len;
4667 return (0);
4668 }
4669
4670 caddr_t
4671 if_getlladdr(const if_t ifp)
4672 {
4673 return (IF_LLADDR((struct ifnet *)ifp));
4674 }
4675
4676 void *
4677 if_gethandle(u_char type)
4678 {
4679 return (if_alloc(type));
4680 }
4681
4682 void
4683 if_bpfmtap(if_t ifh, struct mbuf *m)
4684 {
4685 struct ifnet *ifp = (struct ifnet *)ifh;
4686
4687 BPF_MTAP(ifp, m);
4688 }
4689
4690 void
4691 if_etherbpfmtap(if_t ifh, struct mbuf *m)
4692 {
4693 struct ifnet *ifp = (struct ifnet *)ifh;
4694
4695 ETHER_BPF_MTAP(ifp, m);
4696 }
4697
4698 void
4699 if_vlancap(if_t ifh)
4700 {
4701 struct ifnet *ifp = (struct ifnet *)ifh;
4702 VLAN_CAPABILITIES(ifp);
4703 }
4704
4705 int
4706 if_sethwtsomax(if_t ifp, u_int if_hw_tsomax)
4707 {
4708
4709 ((struct ifnet *)ifp)->if_hw_tsomax = if_hw_tsomax;
4710 return (0);
4711 }
4712
4713 int
4714 if_sethwtsomaxsegcount(if_t ifp, u_int if_hw_tsomaxsegcount)
4715 {
4716
4717 ((struct ifnet *)ifp)->if_hw_tsomaxsegcount = if_hw_tsomaxsegcount;
4718 return (0);
4719 }
4720
4721 int
4722 if_sethwtsomaxsegsize(if_t ifp, u_int if_hw_tsomaxsegsize)
4723 {
4724
4725 ((struct ifnet *)ifp)->if_hw_tsomaxsegsize = if_hw_tsomaxsegsize;
4726 return (0);
4727 }
4728
4729 u_int
4730 if_gethwtsomax(const if_t ifp)
4731 {
4732
4733 return (((struct ifnet *)ifp)->if_hw_tsomax);
4734 }
4735
4736 u_int
4737 if_gethwtsomaxsegcount(const if_t ifp)
4738 {
4739
4740 return (((struct ifnet *)ifp)->if_hw_tsomaxsegcount);
4741 }
4742
4743 u_int
4744 if_gethwtsomaxsegsize(const if_t ifp)
4745 {
4746
4747 return (((struct ifnet *)ifp)->if_hw_tsomaxsegsize);
4748 }
4749
4750 void
4751 if_setinitfn(if_t ifp, if_init_fn_t init_fn)
4752 {
4753 ((struct ifnet *)ifp)->if_init = init_fn;
4754 }
4755
4756 void
4757 if_setinputfn(if_t ifp, if_input_fn_t input_fn)
4758 {
4759 ((struct ifnet *)ifp)->if_input = input_fn;
4760 }
4761
4762 void
4763 if_setioctlfn(if_t ifp, if_ioctl_fn_t ioctl_fn)
4764 {
4765 ((struct ifnet *)ifp)->if_ioctl = (void *)ioctl_fn;
4766 }
4767
4768 void
4769 if_setoutputfn(if_t ifp, if_output_fn_t output_fn)
4770 {
4771 ((struct ifnet *)ifp)->if_output = output_fn;
4772 }
4773
4774 void
4775 if_setstartfn(if_t ifp, if_start_fn_t start_fn)
4776 {
4777 ((struct ifnet *)ifp)->if_start = (void *)start_fn;
4778 }
4779
4780 void
4781 if_settransmitfn(if_t ifp, if_transmit_fn_t start_fn)
4782 {
4783 ((struct ifnet *)ifp)->if_transmit = start_fn;
4784 }
4785
4786 void
4787 if_setqflushfn(if_t ifp, if_qflush_fn_t flush_fn)
4788 {
4789 ((struct ifnet *)ifp)->if_qflush = flush_fn;
4790
4791 }
4792
4793 void
4794 if_setsndtagallocfn(if_t ifp, if_snd_tag_alloc_t alloc_fn)
4795 {
4796 ((struct ifnet *)ifp)->if_snd_tag_alloc = alloc_fn;
4797 }
4798
4799 void
4800 if_setgetcounterfn(if_t ifp, if_get_counter_t fn)
4801 {
4802
4803 ifp->if_get_counter = fn;
4804 }
4805
4806 void
4807 if_setdebugnet_methods(if_t ifp, struct debugnet_methods *m)
4808 {
4809 ifp->if_debugnet_methods = m;
4810 }
4811
4812 #ifdef DDB
4813 static void
4814 if_show_ifnet(struct ifnet *ifp)
4815 {
4816
4817 if (ifp == NULL)
4818 return;
4819 db_printf("%s:\n", ifp->if_xname);
4820 #define IF_DB_PRINTF(f, e) db_printf(" %s = " f "\n", #e, ifp->e);
4821 IF_DB_PRINTF("%s", if_dname);
4822 IF_DB_PRINTF("%d", if_dunit);
4823 IF_DB_PRINTF("%s", if_description);
4824 IF_DB_PRINTF("%u", if_index);
4825 IF_DB_PRINTF("%d", if_idxgen);
4826 IF_DB_PRINTF("%u", if_refcount);
4827 IF_DB_PRINTF("%p", if_softc);
4828 IF_DB_PRINTF("%p", if_l2com);
4829 IF_DB_PRINTF("%p", if_llsoftc);
4830 IF_DB_PRINTF("%d", if_amcount);
4831 IF_DB_PRINTF("%p", if_addr);
4832 IF_DB_PRINTF("%p", if_broadcastaddr);
4833 IF_DB_PRINTF("%p", if_afdata);
4834 IF_DB_PRINTF("%d", if_afdata_initialized);
4835 IF_DB_PRINTF("%u", if_fib);
4836 IF_DB_PRINTF("%p", if_vnet);
4837 IF_DB_PRINTF("%p", if_home_vnet);
4838 IF_DB_PRINTF("%p", if_vlantrunk);
4839 IF_DB_PRINTF("%p", if_bpf);
4840 IF_DB_PRINTF("%u", if_pcount);
4841 IF_DB_PRINTF("%p", if_bridge);
4842 IF_DB_PRINTF("%p", if_lagg);
4843 IF_DB_PRINTF("%p", if_pf_kif);
4844 IF_DB_PRINTF("%p", if_carp);
4845 IF_DB_PRINTF("%p", if_label);
4846 IF_DB_PRINTF("%p", if_netmap);
4847 IF_DB_PRINTF("0x%08x", if_flags);
4848 IF_DB_PRINTF("0x%08x", if_drv_flags);
4849 IF_DB_PRINTF("0x%08x", if_capabilities);
4850 IF_DB_PRINTF("0x%08x", if_capenable);
4851 IF_DB_PRINTF("%p", if_snd.ifq_head);
4852 IF_DB_PRINTF("%p", if_snd.ifq_tail);
4853 IF_DB_PRINTF("%d", if_snd.ifq_len);
4854 IF_DB_PRINTF("%d", if_snd.ifq_maxlen);
4855 IF_DB_PRINTF("%p", if_snd.ifq_drv_head);
4856 IF_DB_PRINTF("%p", if_snd.ifq_drv_tail);
4857 IF_DB_PRINTF("%d", if_snd.ifq_drv_len);
4858 IF_DB_PRINTF("%d", if_snd.ifq_drv_maxlen);
4859 IF_DB_PRINTF("%d", if_snd.altq_type);
4860 IF_DB_PRINTF("%x", if_snd.altq_flags);
4861 #undef IF_DB_PRINTF
4862 }
4863
4864 DB_SHOW_COMMAND(ifnet, db_show_ifnet)
4865 {
4866
4867 if (!have_addr) {
4868 db_printf("usage: show ifnet <struct ifnet *>\n");
4869 return;
4870 }
4871
4872 if_show_ifnet((struct ifnet *)addr);
4873 }
4874
4875 DB_SHOW_ALL_COMMAND(ifnets, db_show_all_ifnets)
4876 {
4877 struct ifnet *ifp;
4878 u_short idx;
4879
4880 for (idx = 1; idx <= if_index; idx++) {
4881 ifp = ifindex_table[idx].ife_ifnet;
4882 if (ifp == NULL)
4883 continue;
4884 db_printf( "%20s ifp=%p\n", ifp->if_xname, ifp);
4885 if (db_pager_quit)
4886 break;
4887 }
4888 }
4889 #endif /* DDB */
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