1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 2010 Bjoern A. Zeeb <[email protected]>
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 */
34
35 #include "opt_bpf.h"
36 #include "opt_inet6.h"
37 #include "opt_inet.h"
38 #include "opt_ddb.h"
39
40 #include <sys/param.h>
41 #include <sys/capsicum.h>
42 #include <sys/conf.h>
43 #include <sys/eventhandler.h>
44 #include <sys/malloc.h>
45 #include <sys/domainset.h>
46 #include <sys/sbuf.h>
47 #include <sys/bus.h>
48 #include <sys/epoch.h>
49 #include <sys/mbuf.h>
50 #include <sys/systm.h>
51 #include <sys/priv.h>
52 #include <sys/proc.h>
53 #include <sys/socket.h>
54 #include <sys/socketvar.h>
55 #include <sys/protosw.h>
56 #include <sys/kernel.h>
57 #include <sys/lock.h>
58 #include <sys/refcount.h>
59 #include <sys/module.h>
60 #include <sys/nv.h>
61 #include <sys/rwlock.h>
62 #include <sys/sockio.h>
63 #include <sys/syslog.h>
64 #include <sys/sysctl.h>
65 #include <sys/sysent.h>
66 #include <sys/taskqueue.h>
67 #include <sys/domain.h>
68 #include <sys/jail.h>
69 #include <sys/priv.h>
70
71 #ifdef DDB
72 #include <ddb/ddb.h>
73 #endif
74
75 #include <machine/stdarg.h>
76 #include <vm/uma.h>
77
78 #include <net/bpf.h>
79 #include <net/ethernet.h>
80 #include <net/if.h>
81 #include <net/if_arp.h>
82 #include <net/if_clone.h>
83 #include <net/if_dl.h>
84 #include <net/if_strings.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 int if_setflag(struct ifnet *, int, int, int *, int);
282 static int if_transmit_default(struct ifnet *ifp, struct mbuf *m);
283 static void if_unroute(struct ifnet *, int flag, int fam);
284 static int if_delmulti_locked(struct ifnet *, struct ifmultiaddr *, int);
285 static void do_link_state_change(void *, int);
286 static int if_getgroup(struct ifgroupreq *, struct ifnet *);
287 static int if_getgroupmembers(struct ifgroupreq *);
288 static void if_delgroups(struct ifnet *);
289 static void if_attach_internal(struct ifnet *, bool);
290 static int if_detach_internal(struct ifnet *, bool);
291 static void if_siocaddmulti(void *, int);
292 static void if_link_ifnet(struct ifnet *);
293 static bool if_unlink_ifnet(struct ifnet *, bool);
294 #ifdef VIMAGE
295 static int if_vmove(struct ifnet *, struct vnet *);
296 #endif
297
298 #ifdef INET6
299 /*
300 * XXX: declare here to avoid to include many inet6 related files..
301 * should be more generalized?
302 */
303 extern void nd6_setmtu(struct ifnet *);
304 #endif
305
306 /* ipsec helper hooks */
307 VNET_DEFINE(struct hhook_head *, ipsec_hhh_in[HHOOK_IPSEC_COUNT]);
308 VNET_DEFINE(struct hhook_head *, ipsec_hhh_out[HHOOK_IPSEC_COUNT]);
309
310 int ifqmaxlen = IFQ_MAXLEN;
311 VNET_DEFINE(struct ifnethead, ifnet); /* depend on static init XXX */
312 VNET_DEFINE(struct ifgrouphead, ifg_head);
313
314 /* Table of ifnet by index. */
315 static int if_index;
316 static int if_indexlim = 8;
317 static struct ifindex_entry {
318 struct ifnet *ife_ifnet;
319 uint16_t ife_gencnt;
320 } *ifindex_table;
321
322 SYSCTL_NODE(_net_link_generic, IFMIB_SYSTEM, system,
323 CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
324 "Variables global to all interfaces");
325 static int
sysctl_ifcount(SYSCTL_HANDLER_ARGS)326 sysctl_ifcount(SYSCTL_HANDLER_ARGS)
327 {
328 int rv = 0;
329
330 IFNET_RLOCK();
331 for (int i = 1; i <= if_index; i++)
332 if (ifindex_table[i].ife_ifnet != NULL &&
333 ifindex_table[i].ife_ifnet->if_vnet == curvnet)
334 rv = i;
335 IFNET_RUNLOCK();
336
337 return (sysctl_handle_int(oidp, &rv, 0, req));
338 }
339 SYSCTL_PROC(_net_link_generic_system, IFMIB_IFCOUNT, ifcount,
340 CTLTYPE_INT | CTLFLAG_VNET | CTLFLAG_RD, NULL, 0, sysctl_ifcount, "I",
341 "Maximum known interface index");
342
343 /*
344 * The global network interface list (V_ifnet) and related state (such as
345 * if_index, if_indexlim, and ifindex_table) are protected by an sxlock.
346 * This may be acquired to stabilise the list, or we may rely on NET_EPOCH.
347 */
348 struct sx ifnet_sxlock;
349 SX_SYSINIT_FLAGS(ifnet_sx, &ifnet_sxlock, "ifnet_sx", SX_RECURSE);
350
351 struct sx ifnet_detach_sxlock;
352 SX_SYSINIT_FLAGS(ifnet_detach, &ifnet_detach_sxlock, "ifnet_detach_sx",
353 SX_RECURSE);
354
355 #ifdef VIMAGE
356 #define VNET_IS_SHUTTING_DOWN(_vnet) \
357 ((_vnet)->vnet_shutdown && (_vnet)->vnet_state < SI_SUB_VNET_DONE)
358 #endif
359
360 static if_com_alloc_t *if_com_alloc[256];
361 static if_com_free_t *if_com_free[256];
362
363 static MALLOC_DEFINE(M_IFNET, "ifnet", "interface internals");
364 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address");
365 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address");
366
367 struct ifnet *
ifnet_byindex(u_int idx)368 ifnet_byindex(u_int idx)
369 {
370 struct ifnet *ifp;
371
372 NET_EPOCH_ASSERT();
373
374 if (__predict_false(idx > if_index))
375 return (NULL);
376
377 ifp = ck_pr_load_ptr(&ifindex_table[idx].ife_ifnet);
378
379 if (curvnet != NULL && ifp != NULL && ifp->if_vnet != curvnet)
380 ifp = NULL;
381
382 return (ifp);
383 }
384
385 struct ifnet *
ifnet_byindex_ref(u_int idx)386 ifnet_byindex_ref(u_int idx)
387 {
388 struct ifnet *ifp;
389
390 ifp = ifnet_byindex(idx);
391 if (ifp == NULL || (ifp->if_flags & IFF_DYING))
392 return (NULL);
393 if (!if_try_ref(ifp))
394 return (NULL);
395 return (ifp);
396 }
397
398 struct ifnet *
ifnet_byindexgen(uint16_t idx,uint16_t gen)399 ifnet_byindexgen(uint16_t idx, uint16_t gen)
400 {
401 struct ifnet *ifp;
402
403 NET_EPOCH_ASSERT();
404
405 if (__predict_false(idx > if_index))
406 return (NULL);
407
408 ifp = ck_pr_load_ptr(&ifindex_table[idx].ife_ifnet);
409
410 if (ifindex_table[idx].ife_gencnt == gen)
411 return (ifp);
412 else
413 return (NULL);
414 }
415
416 /*
417 * Network interface utility routines.
418 *
419 * Routines with ifa_ifwith* names take sockaddr *'s as
420 * parameters.
421 */
422
423 static void
if_init_idxtable(void * arg __unused)424 if_init_idxtable(void *arg __unused)
425 {
426
427 ifindex_table = malloc(if_indexlim * sizeof(*ifindex_table),
428 M_IFNET, M_WAITOK | M_ZERO);
429 }
430 SYSINIT(if_init, SI_SUB_INIT_IF, SI_ORDER_SECOND, if_init_idxtable, NULL);
431
432 static void
vnet_if_init(const void * unused __unused)433 vnet_if_init(const void *unused __unused)
434 {
435
436 CK_STAILQ_INIT(&V_ifnet);
437 CK_STAILQ_INIT(&V_ifg_head);
438 vnet_if_clone_init();
439 }
440 VNET_SYSINIT(vnet_if_init, SI_SUB_INIT_IF, SI_ORDER_SECOND, vnet_if_init,
441 NULL);
442
443 static void
if_link_ifnet(struct ifnet * ifp)444 if_link_ifnet(struct ifnet *ifp)
445 {
446
447 IFNET_WLOCK();
448 CK_STAILQ_INSERT_TAIL(&V_ifnet, ifp, if_link);
449 #ifdef VIMAGE
450 curvnet->vnet_ifcnt++;
451 #endif
452 IFNET_WUNLOCK();
453 }
454
455 static bool
if_unlink_ifnet(struct ifnet * ifp,bool vmove)456 if_unlink_ifnet(struct ifnet *ifp, bool vmove)
457 {
458 struct ifnet *iter;
459 int found = 0;
460
461 IFNET_WLOCK();
462 CK_STAILQ_FOREACH(iter, &V_ifnet, if_link)
463 if (iter == ifp) {
464 CK_STAILQ_REMOVE(&V_ifnet, ifp, ifnet, if_link);
465 if (!vmove)
466 ifp->if_flags |= IFF_DYING;
467 found = 1;
468 break;
469 }
470 #ifdef VIMAGE
471 curvnet->vnet_ifcnt--;
472 #endif
473 IFNET_WUNLOCK();
474
475 return (found);
476 }
477
478 #ifdef VIMAGE
479 static void
vnet_if_return(const void * unused __unused)480 vnet_if_return(const void *unused __unused)
481 {
482 struct ifnet *ifp, *nifp;
483 struct ifnet **pending;
484 int found __diagused;
485 int i;
486
487 i = 0;
488
489 /*
490 * We need to protect our access to the V_ifnet tailq. Ordinarily we'd
491 * enter NET_EPOCH, but that's not possible, because if_vmove() calls
492 * if_detach_internal(), which waits for NET_EPOCH callbacks to
493 * complete. We can't do that from within NET_EPOCH.
494 *
495 * However, we can also use the IFNET_xLOCK, which is the V_ifnet
496 * read/write lock. We cannot hold the lock as we call if_vmove()
497 * though, as that presents LOR w.r.t ifnet_sx, in_multi_sx and iflib
498 * ctx lock.
499 */
500 IFNET_WLOCK();
501
502 pending = malloc(sizeof(struct ifnet *) * curvnet->vnet_ifcnt,
503 M_IFNET, M_WAITOK | M_ZERO);
504
505 /* Return all inherited interfaces to their parent vnets. */
506 CK_STAILQ_FOREACH_SAFE(ifp, &V_ifnet, if_link, nifp) {
507 if (ifp->if_home_vnet != ifp->if_vnet) {
508 found = if_unlink_ifnet(ifp, true);
509 MPASS(found);
510
511 pending[i++] = ifp;
512 }
513 }
514 IFNET_WUNLOCK();
515
516 for (int j = 0; j < i; j++) {
517 sx_xlock(&ifnet_detach_sxlock);
518 if_vmove(pending[j], pending[j]->if_home_vnet);
519 sx_xunlock(&ifnet_detach_sxlock);
520 }
521
522 free(pending, M_IFNET);
523 }
524 VNET_SYSUNINIT(vnet_if_return, SI_SUB_VNET_DONE, SI_ORDER_ANY,
525 vnet_if_return, NULL);
526 #endif
527
528 /*
529 * Allocate a struct ifnet and an index for an interface. A layer 2
530 * common structure will also be allocated if an allocation routine is
531 * registered for the passed type.
532 */
533 static struct ifnet *
if_alloc_domain(u_char type,int numa_domain)534 if_alloc_domain(u_char type, int numa_domain)
535 {
536 struct ifnet *ifp;
537 u_short idx;
538
539 KASSERT(numa_domain <= IF_NODOM, ("numa_domain too large"));
540 if (numa_domain == IF_NODOM)
541 ifp = malloc(sizeof(struct ifnet), M_IFNET,
542 M_WAITOK | M_ZERO);
543 else
544 ifp = malloc_domainset(sizeof(struct ifnet), M_IFNET,
545 DOMAINSET_PREF(numa_domain), M_WAITOK | M_ZERO);
546 ifp->if_type = type;
547 ifp->if_alloctype = type;
548 ifp->if_numa_domain = numa_domain;
549 #ifdef VIMAGE
550 ifp->if_vnet = curvnet;
551 #endif
552 if (if_com_alloc[type] != NULL) {
553 ifp->if_l2com = if_com_alloc[type](type, ifp);
554 KASSERT(ifp->if_l2com, ("%s: if_com_alloc[%u] failed", __func__,
555 type));
556 }
557
558 IF_ADDR_LOCK_INIT(ifp);
559 TASK_INIT(&ifp->if_linktask, 0, do_link_state_change, ifp);
560 TASK_INIT(&ifp->if_addmultitask, 0, if_siocaddmulti, ifp);
561 ifp->if_afdata_initialized = 0;
562 IF_AFDATA_LOCK_INIT(ifp);
563 CK_STAILQ_INIT(&ifp->if_addrhead);
564 CK_STAILQ_INIT(&ifp->if_multiaddrs);
565 CK_STAILQ_INIT(&ifp->if_groups);
566 #ifdef MAC
567 mac_ifnet_init(ifp);
568 #endif
569 ifq_init(&ifp->if_snd, ifp);
570
571 refcount_init(&ifp->if_refcount, 1); /* Index reference. */
572 for (int i = 0; i < IFCOUNTERS; i++)
573 ifp->if_counters[i] = counter_u64_alloc(M_WAITOK);
574 ifp->if_get_counter = if_get_counter_default;
575 ifp->if_pcp = IFNET_PCP_NONE;
576
577 /* Allocate an ifindex array entry. */
578 IFNET_WLOCK();
579 /*
580 * Try to find an empty slot below if_index. If we fail, take the
581 * next slot.
582 */
583 for (idx = 1; idx <= if_index; idx++) {
584 if (ifindex_table[idx].ife_ifnet == NULL)
585 break;
586 }
587
588 /* Catch if_index overflow. */
589 if (idx >= if_indexlim) {
590 struct ifindex_entry *new, *old;
591 int newlim;
592
593 newlim = if_indexlim * 2;
594 new = malloc(newlim * sizeof(*new), M_IFNET, M_WAITOK | M_ZERO);
595 memcpy(new, ifindex_table, if_indexlim * sizeof(*new));
596 old = ifindex_table;
597 ck_pr_store_ptr(&ifindex_table, new);
598 if_indexlim = newlim;
599 NET_EPOCH_WAIT();
600 free(old, M_IFNET);
601 }
602 if (idx > if_index)
603 if_index = idx;
604
605 ifp->if_index = idx;
606 ifp->if_idxgen = ifindex_table[idx].ife_gencnt;
607 ck_pr_store_ptr(&ifindex_table[idx].ife_ifnet, ifp);
608 IFNET_WUNLOCK();
609
610 return (ifp);
611 }
612
613 struct ifnet *
if_alloc_dev(u_char type,device_t dev)614 if_alloc_dev(u_char type, device_t dev)
615 {
616 int numa_domain;
617
618 if (dev == NULL || bus_get_domain(dev, &numa_domain) != 0)
619 return (if_alloc_domain(type, IF_NODOM));
620 return (if_alloc_domain(type, numa_domain));
621 }
622
623 struct ifnet *
if_alloc(u_char type)624 if_alloc(u_char type)
625 {
626
627 return (if_alloc_domain(type, IF_NODOM));
628 }
629 /*
630 * Do the actual work of freeing a struct ifnet, and layer 2 common
631 * structure. This call is made when the network epoch guarantees
632 * us that nobody holds a pointer to the interface.
633 */
634 static void
if_free_deferred(epoch_context_t ctx)635 if_free_deferred(epoch_context_t ctx)
636 {
637 struct ifnet *ifp = __containerof(ctx, struct ifnet, if_epoch_ctx);
638
639 KASSERT((ifp->if_flags & IFF_DYING),
640 ("%s: interface not dying", __func__));
641
642 if (if_com_free[ifp->if_alloctype] != NULL)
643 if_com_free[ifp->if_alloctype](ifp->if_l2com,
644 ifp->if_alloctype);
645
646 #ifdef MAC
647 mac_ifnet_destroy(ifp);
648 #endif /* MAC */
649 IF_AFDATA_DESTROY(ifp);
650 IF_ADDR_LOCK_DESTROY(ifp);
651 ifq_delete(&ifp->if_snd);
652
653 for (int i = 0; i < IFCOUNTERS; i++)
654 counter_u64_free(ifp->if_counters[i]);
655
656 if_freedescr(ifp->if_description);
657 free(ifp->if_hw_addr, M_IFADDR);
658 free(ifp, M_IFNET);
659 }
660
661 /*
662 * Deregister an interface and free the associated storage.
663 */
664 void
if_free(struct ifnet * ifp)665 if_free(struct ifnet *ifp)
666 {
667
668 ifp->if_flags |= IFF_DYING; /* XXX: Locking */
669
670 /*
671 * XXXGL: An interface index is really an alias to ifp pointer.
672 * Why would we clear the alias now, and not in the deferred
673 * context? Indeed there is nothing wrong with some network
674 * thread obtaining ifp via ifnet_byindex() inside the network
675 * epoch and then dereferencing ifp while we perform if_free(),
676 * and after if_free() finished, too.
677 *
678 * This early index freeing was important back when ifindex was
679 * virtualized and interface would outlive the vnet.
680 */
681 IFNET_WLOCK();
682 MPASS(ifindex_table[ifp->if_index].ife_ifnet == ifp);
683 ck_pr_store_ptr(&ifindex_table[ifp->if_index].ife_ifnet, NULL);
684 ifindex_table[ifp->if_index].ife_gencnt++;
685 while (if_index > 0 && ifindex_table[if_index].ife_ifnet == NULL)
686 if_index--;
687 IFNET_WUNLOCK();
688
689 if (refcount_release(&ifp->if_refcount))
690 NET_EPOCH_CALL(if_free_deferred, &ifp->if_epoch_ctx);
691 }
692
693 /*
694 * Interfaces to keep an ifnet type-stable despite the possibility of the
695 * driver calling if_free(). If there are additional references, we defer
696 * freeing the underlying data structure.
697 */
698 void
if_ref(struct ifnet * ifp)699 if_ref(struct ifnet *ifp)
700 {
701 u_int old __diagused;
702
703 /* We don't assert the ifnet list lock here, but arguably should. */
704 old = refcount_acquire(&ifp->if_refcount);
705 KASSERT(old > 0, ("%s: ifp %p has 0 refs", __func__, ifp));
706 }
707
708 bool
if_try_ref(struct ifnet * ifp)709 if_try_ref(struct ifnet *ifp)
710 {
711 NET_EPOCH_ASSERT();
712 return (refcount_acquire_if_not_zero(&ifp->if_refcount));
713 }
714
715 void
if_rele(struct ifnet * ifp)716 if_rele(struct ifnet *ifp)
717 {
718
719 if (!refcount_release(&ifp->if_refcount))
720 return;
721 NET_EPOCH_CALL(if_free_deferred, &ifp->if_epoch_ctx);
722 }
723
724 void
ifq_init(struct ifaltq * ifq,struct ifnet * ifp)725 ifq_init(struct ifaltq *ifq, struct ifnet *ifp)
726 {
727
728 mtx_init(&ifq->ifq_mtx, ifp->if_xname, "if send queue", MTX_DEF);
729
730 if (ifq->ifq_maxlen == 0)
731 ifq->ifq_maxlen = ifqmaxlen;
732
733 ifq->altq_type = 0;
734 ifq->altq_disc = NULL;
735 ifq->altq_flags &= ALTQF_CANTCHANGE;
736 ifq->altq_tbr = NULL;
737 ifq->altq_ifp = ifp;
738 }
739
740 void
ifq_delete(struct ifaltq * ifq)741 ifq_delete(struct ifaltq *ifq)
742 {
743 mtx_destroy(&ifq->ifq_mtx);
744 }
745
746 /*
747 * Perform generic interface initialization tasks and attach the interface
748 * to the list of "active" interfaces. If vmove flag is set on entry
749 * to if_attach_internal(), perform only a limited subset of initialization
750 * tasks, given that we are moving from one vnet to another an ifnet which
751 * has already been fully initialized.
752 *
753 * Note that if_detach_internal() removes group membership unconditionally
754 * even when vmove flag is set, and if_attach_internal() adds only IFG_ALL.
755 * Thus, when if_vmove() is applied to a cloned interface, group membership
756 * is lost while a cloned one always joins a group whose name is
757 * ifc->ifc_name. To recover this after if_detach_internal() and
758 * if_attach_internal(), the cloner should be specified to
759 * if_attach_internal() via ifc. If it is non-NULL, if_attach_internal()
760 * attempts to join a group whose name is ifc->ifc_name.
761 *
762 * XXX:
763 * - The decision to return void and thus require this function to
764 * succeed is questionable.
765 * - We should probably do more sanity checking. For instance we don't
766 * do anything to insure if_xname is unique or non-empty.
767 */
768 void
if_attach(struct ifnet * ifp)769 if_attach(struct ifnet *ifp)
770 {
771
772 if_attach_internal(ifp, false);
773 }
774
775 /*
776 * Compute the least common TSO limit.
777 */
778 void
if_hw_tsomax_common(if_t ifp,struct ifnet_hw_tsomax * pmax)779 if_hw_tsomax_common(if_t ifp, struct ifnet_hw_tsomax *pmax)
780 {
781 /*
782 * 1) If there is no limit currently, take the limit from
783 * the network adapter.
784 *
785 * 2) If the network adapter has a limit below the current
786 * limit, apply it.
787 */
788 if (pmax->tsomaxbytes == 0 || (ifp->if_hw_tsomax != 0 &&
789 ifp->if_hw_tsomax < pmax->tsomaxbytes)) {
790 pmax->tsomaxbytes = ifp->if_hw_tsomax;
791 }
792 if (pmax->tsomaxsegcount == 0 || (ifp->if_hw_tsomaxsegcount != 0 &&
793 ifp->if_hw_tsomaxsegcount < pmax->tsomaxsegcount)) {
794 pmax->tsomaxsegcount = ifp->if_hw_tsomaxsegcount;
795 }
796 if (pmax->tsomaxsegsize == 0 || (ifp->if_hw_tsomaxsegsize != 0 &&
797 ifp->if_hw_tsomaxsegsize < pmax->tsomaxsegsize)) {
798 pmax->tsomaxsegsize = ifp->if_hw_tsomaxsegsize;
799 }
800 }
801
802 /*
803 * Update TSO limit of a network adapter.
804 *
805 * Returns zero if no change. Else non-zero.
806 */
807 int
if_hw_tsomax_update(if_t ifp,struct ifnet_hw_tsomax * pmax)808 if_hw_tsomax_update(if_t ifp, struct ifnet_hw_tsomax *pmax)
809 {
810 int retval = 0;
811 if (ifp->if_hw_tsomax != pmax->tsomaxbytes) {
812 ifp->if_hw_tsomax = pmax->tsomaxbytes;
813 retval++;
814 }
815 if (ifp->if_hw_tsomaxsegsize != pmax->tsomaxsegsize) {
816 ifp->if_hw_tsomaxsegsize = pmax->tsomaxsegsize;
817 retval++;
818 }
819 if (ifp->if_hw_tsomaxsegcount != pmax->tsomaxsegcount) {
820 ifp->if_hw_tsomaxsegcount = pmax->tsomaxsegcount;
821 retval++;
822 }
823 return (retval);
824 }
825
826 static void
if_attach_internal(struct ifnet * ifp,bool vmove)827 if_attach_internal(struct ifnet *ifp, bool vmove)
828 {
829 unsigned socksize, ifasize;
830 int namelen, masklen;
831 struct sockaddr_dl *sdl;
832 struct ifaddr *ifa;
833
834 MPASS(ifindex_table[ifp->if_index].ife_ifnet == ifp);
835
836 #ifdef VIMAGE
837 CURVNET_ASSERT_SET();
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
if_epochalloc(void * dummy __unused)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
if_attachdomain(void * dummy)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
if_attachdomain1(struct ifnet * ifp)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
if_purgeaddrs(struct ifnet * ifp)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
if_purgemaddrs(struct ifnet * ifp)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
if_detach(struct ifnet * ifp)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
if_detach_internal(struct ifnet * ifp,bool vmove)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 sx_assert(&ifnet_detach_sxlock, SX_XLOCKED);
1133
1134 /*
1135 * At this point we know the interface still was on the ifnet list
1136 * and we removed it so we are in a stable state.
1137 */
1138 NET_EPOCH_WAIT();
1139
1140 /*
1141 * Ensure all pending EPOCH(9) callbacks have been executed. This
1142 * fixes issues about late destruction of multicast options
1143 * which lead to leave group calls, which in turn access the
1144 * belonging ifnet structure:
1145 */
1146 NET_EPOCH_DRAIN_CALLBACKS();
1147
1148 /*
1149 * In any case (destroy or vmove) detach us from the groups
1150 * and remove/wait for pending events on the taskq.
1151 * XXX-BZ in theory an interface could still enqueue a taskq change?
1152 */
1153 if_delgroups(ifp);
1154
1155 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
1156 taskqueue_drain(taskqueue_swi, &ifp->if_addmultitask);
1157
1158 if_down(ifp);
1159
1160 #ifdef VIMAGE
1161 /*
1162 * On VNET shutdown abort here as the stack teardown will do all
1163 * the work top-down for us.
1164 */
1165 if (shutdown) {
1166 /* Give interface users the chance to clean up. */
1167 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
1168
1169 /*
1170 * In case of a vmove we are done here without error.
1171 * If we would signal an error it would lead to the same
1172 * abort as if we did not find the ifnet anymore.
1173 * if_detach() calls us in void context and does not care
1174 * about an early abort notification, so life is splendid :)
1175 */
1176 goto finish_vnet_shutdown;
1177 }
1178 #endif
1179
1180 /*
1181 * At this point we are not tearing down a VNET and are either
1182 * going to destroy or vmove the interface and have to cleanup
1183 * accordingly.
1184 */
1185
1186 /*
1187 * Remove routes and flush queues.
1188 */
1189 #ifdef ALTQ
1190 if (ALTQ_IS_ENABLED(&ifp->if_snd))
1191 altq_disable(&ifp->if_snd);
1192 if (ALTQ_IS_ATTACHED(&ifp->if_snd))
1193 altq_detach(&ifp->if_snd);
1194 #endif
1195
1196 if_purgeaddrs(ifp);
1197
1198 #ifdef INET
1199 in_ifdetach(ifp);
1200 #endif
1201
1202 #ifdef INET6
1203 /*
1204 * Remove all IPv6 kernel structs related to ifp. This should be done
1205 * before removing routing entries below, since IPv6 interface direct
1206 * routes are expected to be removed by the IPv6-specific kernel API.
1207 * Otherwise, the kernel will detect some inconsistency and bark it.
1208 */
1209 in6_ifdetach(ifp);
1210 #endif
1211 if_purgemaddrs(ifp);
1212
1213 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
1214 if (IS_DEFAULT_VNET(curvnet))
1215 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL);
1216
1217 if (!vmove) {
1218 /*
1219 * Prevent further calls into the device driver via ifnet.
1220 */
1221 if_dead(ifp);
1222
1223 /*
1224 * Clean up all addresses.
1225 */
1226 IF_ADDR_WLOCK(ifp);
1227 if (!CK_STAILQ_EMPTY(&ifp->if_addrhead)) {
1228 ifa = CK_STAILQ_FIRST(&ifp->if_addrhead);
1229 CK_STAILQ_REMOVE(&ifp->if_addrhead, ifa, ifaddr, ifa_link);
1230 IF_ADDR_WUNLOCK(ifp);
1231 ifa_free(ifa);
1232 } else
1233 IF_ADDR_WUNLOCK(ifp);
1234 }
1235
1236 rt_flushifroutes(ifp);
1237
1238 #ifdef VIMAGE
1239 finish_vnet_shutdown:
1240 #endif
1241 /*
1242 * We cannot hold the lock over dom_ifdetach calls as they might
1243 * sleep, for example trying to drain a callout, thus open up the
1244 * theoretical race with re-attaching.
1245 */
1246 IF_AFDATA_LOCK(ifp);
1247 i = ifp->if_afdata_initialized;
1248 ifp->if_afdata_initialized = 0;
1249 IF_AFDATA_UNLOCK(ifp);
1250 if (i == 0)
1251 return (0);
1252 SLIST_FOREACH(dp, &domains, dom_next) {
1253 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) {
1254 (*dp->dom_ifdetach)(ifp,
1255 ifp->if_afdata[dp->dom_family]);
1256 ifp->if_afdata[dp->dom_family] = NULL;
1257 }
1258 }
1259
1260 return (0);
1261 }
1262
1263 #ifdef VIMAGE
1264 /*
1265 * if_vmove() performs a limited version of if_detach() in current
1266 * vnet and if_attach()es the ifnet to the vnet specified as 2nd arg.
1267 */
1268 static int
if_vmove(struct ifnet * ifp,struct vnet * new_vnet)1269 if_vmove(struct ifnet *ifp, struct vnet *new_vnet)
1270 {
1271 int rc;
1272
1273 /*
1274 * Detach from current vnet, but preserve LLADDR info, do not
1275 * mark as dead etc. so that the ifnet can be reattached later.
1276 * If we cannot find it, we lost the race to someone else.
1277 */
1278 rc = if_detach_internal(ifp, true);
1279 if (rc != 0)
1280 return (rc);
1281
1282 /*
1283 * Perform interface-specific reassignment tasks, if provided by
1284 * the driver.
1285 */
1286 if (ifp->if_reassign != NULL)
1287 ifp->if_reassign(ifp, new_vnet, NULL);
1288
1289 /*
1290 * Switch to the context of the target vnet.
1291 */
1292 CURVNET_SET_QUIET(new_vnet);
1293 if_attach_internal(ifp, true);
1294 CURVNET_RESTORE();
1295 return (0);
1296 }
1297
1298 /*
1299 * Move an ifnet to or from another child prison/vnet, specified by the jail id.
1300 */
1301 static int
if_vmove_loan(struct thread * td,struct ifnet * ifp,char * ifname,int jid)1302 if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid)
1303 {
1304 struct prison *pr;
1305 struct ifnet *difp;
1306 int error;
1307 bool found __diagused;
1308 bool shutdown;
1309
1310 MPASS(ifindex_table[ifp->if_index].ife_ifnet == ifp);
1311
1312 /* Try to find the prison within our visibility. */
1313 sx_slock(&allprison_lock);
1314 pr = prison_find_child(td->td_ucred->cr_prison, jid);
1315 sx_sunlock(&allprison_lock);
1316 if (pr == NULL)
1317 return (ENXIO);
1318 prison_hold_locked(pr);
1319 mtx_unlock(&pr->pr_mtx);
1320
1321 /* Do not try to move the iface from and to the same prison. */
1322 if (pr->pr_vnet == ifp->if_vnet) {
1323 prison_free(pr);
1324 return (EEXIST);
1325 }
1326
1327 /* Make sure the named iface does not exists in the dst. prison/vnet. */
1328 /* XXX Lock interfaces to avoid races. */
1329 CURVNET_SET_QUIET(pr->pr_vnet);
1330 difp = ifunit(ifname);
1331 CURVNET_RESTORE();
1332 if (difp != NULL) {
1333 prison_free(pr);
1334 return (EEXIST);
1335 }
1336 sx_xlock(&ifnet_detach_sxlock);
1337
1338 /* Make sure the VNET is stable. */
1339 shutdown = VNET_IS_SHUTTING_DOWN(ifp->if_vnet);
1340 if (shutdown) {
1341 sx_xunlock(&ifnet_detach_sxlock);
1342 prison_free(pr);
1343 return (EBUSY);
1344 }
1345
1346 found = if_unlink_ifnet(ifp, true);
1347 if (! found) {
1348 sx_xunlock(&ifnet_detach_sxlock);
1349 prison_free(pr);
1350 return (ENODEV);
1351 }
1352
1353 /* Move the interface into the child jail/vnet. */
1354 error = if_vmove(ifp, pr->pr_vnet);
1355
1356 /* Report the new if_xname back to the userland on success. */
1357 if (error == 0)
1358 sprintf(ifname, "%s", ifp->if_xname);
1359
1360 sx_xunlock(&ifnet_detach_sxlock);
1361
1362 prison_free(pr);
1363 return (error);
1364 }
1365
1366 static int
if_vmove_reclaim(struct thread * td,char * ifname,int jid)1367 if_vmove_reclaim(struct thread *td, char *ifname, int jid)
1368 {
1369 struct prison *pr;
1370 struct vnet *vnet_dst;
1371 struct ifnet *ifp;
1372 int error, found __diagused;
1373 bool shutdown;
1374
1375 /* Try to find the prison within our visibility. */
1376 sx_slock(&allprison_lock);
1377 pr = prison_find_child(td->td_ucred->cr_prison, jid);
1378 sx_sunlock(&allprison_lock);
1379 if (pr == NULL)
1380 return (ENXIO);
1381 prison_hold_locked(pr);
1382 mtx_unlock(&pr->pr_mtx);
1383
1384 /* Make sure the named iface exists in the source prison/vnet. */
1385 CURVNET_SET(pr->pr_vnet);
1386 ifp = ifunit(ifname); /* XXX Lock to avoid races. */
1387 if (ifp == NULL) {
1388 CURVNET_RESTORE();
1389 prison_free(pr);
1390 return (ENXIO);
1391 }
1392
1393 /* Do not try to move the iface from and to the same prison. */
1394 vnet_dst = TD_TO_VNET(td);
1395 if (vnet_dst == ifp->if_vnet) {
1396 CURVNET_RESTORE();
1397 prison_free(pr);
1398 return (EEXIST);
1399 }
1400
1401 /* Make sure the VNET is stable. */
1402 shutdown = VNET_IS_SHUTTING_DOWN(ifp->if_vnet);
1403 if (shutdown) {
1404 CURVNET_RESTORE();
1405 prison_free(pr);
1406 return (EBUSY);
1407 }
1408
1409 /* Get interface back from child jail/vnet. */
1410 found = if_unlink_ifnet(ifp, true);
1411 MPASS(found);
1412 sx_xlock(&ifnet_detach_sxlock);
1413 error = if_vmove(ifp, vnet_dst);
1414 sx_xunlock(&ifnet_detach_sxlock);
1415 CURVNET_RESTORE();
1416
1417 /* Report the new if_xname back to the userland on success. */
1418 if (error == 0)
1419 sprintf(ifname, "%s", ifp->if_xname);
1420
1421 prison_free(pr);
1422 return (error);
1423 }
1424 #endif /* VIMAGE */
1425
1426 /*
1427 * Add a group to an interface
1428 */
1429 int
if_addgroup(struct ifnet * ifp,const char * groupname)1430 if_addgroup(struct ifnet *ifp, const char *groupname)
1431 {
1432 struct ifg_list *ifgl;
1433 struct ifg_group *ifg = NULL;
1434 struct ifg_member *ifgm;
1435 int new = 0;
1436
1437 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' &&
1438 groupname[strlen(groupname) - 1] <= '9')
1439 return (EINVAL);
1440
1441 IFNET_WLOCK();
1442 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1443 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) {
1444 IFNET_WUNLOCK();
1445 return (EEXIST);
1446 }
1447
1448 if ((ifgl = malloc(sizeof(*ifgl), M_TEMP, M_NOWAIT)) == NULL) {
1449 IFNET_WUNLOCK();
1450 return (ENOMEM);
1451 }
1452
1453 if ((ifgm = malloc(sizeof(*ifgm), M_TEMP, M_NOWAIT)) == NULL) {
1454 free(ifgl, M_TEMP);
1455 IFNET_WUNLOCK();
1456 return (ENOMEM);
1457 }
1458
1459 CK_STAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
1460 if (!strcmp(ifg->ifg_group, groupname))
1461 break;
1462
1463 if (ifg == NULL) {
1464 if ((ifg = malloc(sizeof(*ifg), M_TEMP, M_NOWAIT)) == NULL) {
1465 free(ifgl, M_TEMP);
1466 free(ifgm, M_TEMP);
1467 IFNET_WUNLOCK();
1468 return (ENOMEM);
1469 }
1470 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group));
1471 ifg->ifg_refcnt = 0;
1472 CK_STAILQ_INIT(&ifg->ifg_members);
1473 CK_STAILQ_INSERT_TAIL(&V_ifg_head, ifg, ifg_next);
1474 new = 1;
1475 }
1476
1477 ifg->ifg_refcnt++;
1478 ifgl->ifgl_group = ifg;
1479 ifgm->ifgm_ifp = ifp;
1480
1481 IF_ADDR_WLOCK(ifp);
1482 CK_STAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next);
1483 CK_STAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next);
1484 IF_ADDR_WUNLOCK(ifp);
1485
1486 IFNET_WUNLOCK();
1487
1488 if (new)
1489 EVENTHANDLER_INVOKE(group_attach_event, ifg);
1490 EVENTHANDLER_INVOKE(group_change_event, groupname);
1491
1492 return (0);
1493 }
1494
1495 /*
1496 * Helper function to remove a group out of an interface. Expects the global
1497 * ifnet lock to be write-locked, and drops it before returning.
1498 */
1499 static void
_if_delgroup_locked(struct ifnet * ifp,struct ifg_list * ifgl,const char * groupname)1500 _if_delgroup_locked(struct ifnet *ifp, struct ifg_list *ifgl,
1501 const char *groupname)
1502 {
1503 struct ifg_member *ifgm;
1504 bool freeifgl;
1505
1506 IFNET_WLOCK_ASSERT();
1507
1508 IF_ADDR_WLOCK(ifp);
1509 CK_STAILQ_REMOVE(&ifp->if_groups, ifgl, ifg_list, ifgl_next);
1510 IF_ADDR_WUNLOCK(ifp);
1511
1512 CK_STAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) {
1513 if (ifgm->ifgm_ifp == ifp) {
1514 CK_STAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm,
1515 ifg_member, ifgm_next);
1516 break;
1517 }
1518 }
1519
1520 if (--ifgl->ifgl_group->ifg_refcnt == 0) {
1521 CK_STAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_group,
1522 ifg_next);
1523 freeifgl = true;
1524 } else {
1525 freeifgl = false;
1526 }
1527 IFNET_WUNLOCK();
1528
1529 NET_EPOCH_WAIT();
1530 EVENTHANDLER_INVOKE(group_change_event, groupname);
1531 if (freeifgl) {
1532 EVENTHANDLER_INVOKE(group_detach_event, ifgl->ifgl_group);
1533 free(ifgl->ifgl_group, M_TEMP);
1534 }
1535 free(ifgm, M_TEMP);
1536 free(ifgl, M_TEMP);
1537 }
1538
1539 /*
1540 * Remove a group from an interface
1541 */
1542 int
if_delgroup(struct ifnet * ifp,const char * groupname)1543 if_delgroup(struct ifnet *ifp, const char *groupname)
1544 {
1545 struct ifg_list *ifgl;
1546
1547 IFNET_WLOCK();
1548 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1549 if (strcmp(ifgl->ifgl_group->ifg_group, groupname) == 0)
1550 break;
1551 if (ifgl == NULL) {
1552 IFNET_WUNLOCK();
1553 return (ENOENT);
1554 }
1555
1556 _if_delgroup_locked(ifp, ifgl, groupname);
1557
1558 return (0);
1559 }
1560
1561 /*
1562 * Remove an interface from all groups
1563 */
1564 static void
if_delgroups(struct ifnet * ifp)1565 if_delgroups(struct ifnet *ifp)
1566 {
1567 struct ifg_list *ifgl;
1568 char groupname[IFNAMSIZ];
1569
1570 IFNET_WLOCK();
1571 while ((ifgl = CK_STAILQ_FIRST(&ifp->if_groups)) != NULL) {
1572 strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ);
1573 _if_delgroup_locked(ifp, ifgl, groupname);
1574 IFNET_WLOCK();
1575 }
1576 IFNET_WUNLOCK();
1577 }
1578
1579 /*
1580 * Stores all groups from an interface in memory pointed to by ifgr.
1581 */
1582 static int
if_getgroup(struct ifgroupreq * ifgr,struct ifnet * ifp)1583 if_getgroup(struct ifgroupreq *ifgr, struct ifnet *ifp)
1584 {
1585 int len, error;
1586 struct ifg_list *ifgl;
1587 struct ifg_req ifgrq, *ifgp;
1588
1589 NET_EPOCH_ASSERT();
1590
1591 if (ifgr->ifgr_len == 0) {
1592 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1593 ifgr->ifgr_len += sizeof(struct ifg_req);
1594 return (0);
1595 }
1596
1597 len = ifgr->ifgr_len;
1598 ifgp = ifgr->ifgr_groups;
1599 /* XXX: wire */
1600 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) {
1601 if (len < sizeof(ifgrq))
1602 return (EINVAL);
1603 bzero(&ifgrq, sizeof ifgrq);
1604 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group,
1605 sizeof(ifgrq.ifgrq_group));
1606 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req))))
1607 return (error);
1608 len -= sizeof(ifgrq);
1609 ifgp++;
1610 }
1611
1612 return (0);
1613 }
1614
1615 /*
1616 * Stores all members of a group in memory pointed to by igfr
1617 */
1618 static int
if_getgroupmembers(struct ifgroupreq * ifgr)1619 if_getgroupmembers(struct ifgroupreq *ifgr)
1620 {
1621 struct ifg_group *ifg;
1622 struct ifg_member *ifgm;
1623 struct ifg_req ifgrq, *ifgp;
1624 int len, error;
1625
1626 IFNET_RLOCK();
1627 CK_STAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
1628 if (strcmp(ifg->ifg_group, ifgr->ifgr_name) == 0)
1629 break;
1630 if (ifg == NULL) {
1631 IFNET_RUNLOCK();
1632 return (ENOENT);
1633 }
1634
1635 if (ifgr->ifgr_len == 0) {
1636 CK_STAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next)
1637 ifgr->ifgr_len += sizeof(ifgrq);
1638 IFNET_RUNLOCK();
1639 return (0);
1640 }
1641
1642 len = ifgr->ifgr_len;
1643 ifgp = ifgr->ifgr_groups;
1644 CK_STAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) {
1645 if (len < sizeof(ifgrq)) {
1646 IFNET_RUNLOCK();
1647 return (EINVAL);
1648 }
1649 bzero(&ifgrq, sizeof ifgrq);
1650 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname,
1651 sizeof(ifgrq.ifgrq_member));
1652 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) {
1653 IFNET_RUNLOCK();
1654 return (error);
1655 }
1656 len -= sizeof(ifgrq);
1657 ifgp++;
1658 }
1659 IFNET_RUNLOCK();
1660
1661 return (0);
1662 }
1663
1664 /*
1665 * Return counter values from counter(9)s stored in ifnet.
1666 */
1667 uint64_t
if_get_counter_default(struct ifnet * ifp,ift_counter cnt)1668 if_get_counter_default(struct ifnet *ifp, ift_counter cnt)
1669 {
1670
1671 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1672
1673 return (counter_u64_fetch(ifp->if_counters[cnt]));
1674 }
1675
1676 /*
1677 * Increase an ifnet counter. Usually used for counters shared
1678 * between the stack and a driver, but function supports them all.
1679 */
1680 void
if_inc_counter(struct ifnet * ifp,ift_counter cnt,int64_t inc)1681 if_inc_counter(struct ifnet *ifp, ift_counter cnt, int64_t inc)
1682 {
1683
1684 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1685
1686 counter_u64_add(ifp->if_counters[cnt], inc);
1687 }
1688
1689 /*
1690 * Copy data from ifnet to userland API structure if_data.
1691 */
1692 void
if_data_copy(struct ifnet * ifp,struct if_data * ifd)1693 if_data_copy(struct ifnet *ifp, struct if_data *ifd)
1694 {
1695
1696 ifd->ifi_type = ifp->if_type;
1697 ifd->ifi_physical = 0;
1698 ifd->ifi_addrlen = ifp->if_addrlen;
1699 ifd->ifi_hdrlen = ifp->if_hdrlen;
1700 ifd->ifi_link_state = ifp->if_link_state;
1701 ifd->ifi_vhid = 0;
1702 ifd->ifi_datalen = sizeof(struct if_data);
1703 ifd->ifi_mtu = ifp->if_mtu;
1704 ifd->ifi_metric = ifp->if_metric;
1705 ifd->ifi_baudrate = ifp->if_baudrate;
1706 ifd->ifi_hwassist = ifp->if_hwassist;
1707 ifd->ifi_epoch = ifp->if_epoch;
1708 ifd->ifi_lastchange = ifp->if_lastchange;
1709
1710 ifd->ifi_ipackets = ifp->if_get_counter(ifp, IFCOUNTER_IPACKETS);
1711 ifd->ifi_ierrors = ifp->if_get_counter(ifp, IFCOUNTER_IERRORS);
1712 ifd->ifi_opackets = ifp->if_get_counter(ifp, IFCOUNTER_OPACKETS);
1713 ifd->ifi_oerrors = ifp->if_get_counter(ifp, IFCOUNTER_OERRORS);
1714 ifd->ifi_collisions = ifp->if_get_counter(ifp, IFCOUNTER_COLLISIONS);
1715 ifd->ifi_ibytes = ifp->if_get_counter(ifp, IFCOUNTER_IBYTES);
1716 ifd->ifi_obytes = ifp->if_get_counter(ifp, IFCOUNTER_OBYTES);
1717 ifd->ifi_imcasts = ifp->if_get_counter(ifp, IFCOUNTER_IMCASTS);
1718 ifd->ifi_omcasts = ifp->if_get_counter(ifp, IFCOUNTER_OMCASTS);
1719 ifd->ifi_iqdrops = ifp->if_get_counter(ifp, IFCOUNTER_IQDROPS);
1720 ifd->ifi_oqdrops = ifp->if_get_counter(ifp, IFCOUNTER_OQDROPS);
1721 ifd->ifi_noproto = ifp->if_get_counter(ifp, IFCOUNTER_NOPROTO);
1722 }
1723
1724 /*
1725 * Initialization, destruction and refcounting functions for ifaddrs.
1726 */
1727 struct ifaddr *
ifa_alloc(size_t size,int flags)1728 ifa_alloc(size_t size, int flags)
1729 {
1730 struct ifaddr *ifa;
1731
1732 KASSERT(size >= sizeof(struct ifaddr),
1733 ("%s: invalid size %zu", __func__, size));
1734
1735 ifa = malloc(size, M_IFADDR, M_ZERO | flags);
1736 if (ifa == NULL)
1737 return (NULL);
1738
1739 if ((ifa->ifa_opackets = counter_u64_alloc(flags)) == NULL)
1740 goto fail;
1741 if ((ifa->ifa_ipackets = counter_u64_alloc(flags)) == NULL)
1742 goto fail;
1743 if ((ifa->ifa_obytes = counter_u64_alloc(flags)) == NULL)
1744 goto fail;
1745 if ((ifa->ifa_ibytes = counter_u64_alloc(flags)) == NULL)
1746 goto fail;
1747
1748 refcount_init(&ifa->ifa_refcnt, 1);
1749
1750 return (ifa);
1751
1752 fail:
1753 /* free(NULL) is okay */
1754 counter_u64_free(ifa->ifa_opackets);
1755 counter_u64_free(ifa->ifa_ipackets);
1756 counter_u64_free(ifa->ifa_obytes);
1757 counter_u64_free(ifa->ifa_ibytes);
1758 free(ifa, M_IFADDR);
1759
1760 return (NULL);
1761 }
1762
1763 void
ifa_ref(struct ifaddr * ifa)1764 ifa_ref(struct ifaddr *ifa)
1765 {
1766 u_int old __diagused;
1767
1768 old = refcount_acquire(&ifa->ifa_refcnt);
1769 KASSERT(old > 0, ("%s: ifa %p has 0 refs", __func__, ifa));
1770 }
1771
1772 int
ifa_try_ref(struct ifaddr * ifa)1773 ifa_try_ref(struct ifaddr *ifa)
1774 {
1775
1776 NET_EPOCH_ASSERT();
1777 return (refcount_acquire_if_not_zero(&ifa->ifa_refcnt));
1778 }
1779
1780 static void
ifa_destroy(epoch_context_t ctx)1781 ifa_destroy(epoch_context_t ctx)
1782 {
1783 struct ifaddr *ifa;
1784
1785 ifa = __containerof(ctx, struct ifaddr, ifa_epoch_ctx);
1786 counter_u64_free(ifa->ifa_opackets);
1787 counter_u64_free(ifa->ifa_ipackets);
1788 counter_u64_free(ifa->ifa_obytes);
1789 counter_u64_free(ifa->ifa_ibytes);
1790 free(ifa, M_IFADDR);
1791 }
1792
1793 void
ifa_free(struct ifaddr * ifa)1794 ifa_free(struct ifaddr *ifa)
1795 {
1796
1797 if (refcount_release(&ifa->ifa_refcnt))
1798 NET_EPOCH_CALL(ifa_destroy, &ifa->ifa_epoch_ctx);
1799 }
1800
1801 /*
1802 * XXX: Because sockaddr_dl has deeper structure than the sockaddr
1803 * structs used to represent other address families, it is necessary
1804 * to perform a different comparison.
1805 */
1806
1807 #define sa_dl_equal(a1, a2) \
1808 ((((const struct sockaddr_dl *)(a1))->sdl_len == \
1809 ((const struct sockaddr_dl *)(a2))->sdl_len) && \
1810 (bcmp(CLLADDR((const struct sockaddr_dl *)(a1)), \
1811 CLLADDR((const struct sockaddr_dl *)(a2)), \
1812 ((const struct sockaddr_dl *)(a1))->sdl_alen) == 0))
1813
1814 /*
1815 * Locate an interface based on a complete address.
1816 */
1817 /*ARGSUSED*/
1818 struct ifaddr *
ifa_ifwithaddr(const struct sockaddr * addr)1819 ifa_ifwithaddr(const struct sockaddr *addr)
1820 {
1821 struct ifnet *ifp;
1822 struct ifaddr *ifa;
1823
1824 NET_EPOCH_ASSERT();
1825
1826 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1827 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1828 if (ifa->ifa_addr->sa_family != addr->sa_family)
1829 continue;
1830 if (sa_equal(addr, ifa->ifa_addr)) {
1831 goto done;
1832 }
1833 /* IP6 doesn't have broadcast */
1834 if ((ifp->if_flags & IFF_BROADCAST) &&
1835 ifa->ifa_broadaddr &&
1836 ifa->ifa_broadaddr->sa_len != 0 &&
1837 sa_equal(ifa->ifa_broadaddr, addr)) {
1838 goto done;
1839 }
1840 }
1841 }
1842 ifa = NULL;
1843 done:
1844 return (ifa);
1845 }
1846
1847 int
ifa_ifwithaddr_check(const struct sockaddr * addr)1848 ifa_ifwithaddr_check(const struct sockaddr *addr)
1849 {
1850 struct epoch_tracker et;
1851 int rc;
1852
1853 NET_EPOCH_ENTER(et);
1854 rc = (ifa_ifwithaddr(addr) != NULL);
1855 NET_EPOCH_EXIT(et);
1856 return (rc);
1857 }
1858
1859 /*
1860 * Locate an interface based on the broadcast address.
1861 */
1862 /* ARGSUSED */
1863 struct ifaddr *
ifa_ifwithbroadaddr(const struct sockaddr * addr,int fibnum)1864 ifa_ifwithbroadaddr(const struct sockaddr *addr, int fibnum)
1865 {
1866 struct ifnet *ifp;
1867 struct ifaddr *ifa;
1868
1869 NET_EPOCH_ASSERT();
1870 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1871 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1872 continue;
1873 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1874 if (ifa->ifa_addr->sa_family != addr->sa_family)
1875 continue;
1876 if ((ifp->if_flags & IFF_BROADCAST) &&
1877 ifa->ifa_broadaddr &&
1878 ifa->ifa_broadaddr->sa_len != 0 &&
1879 sa_equal(ifa->ifa_broadaddr, addr)) {
1880 goto done;
1881 }
1882 }
1883 }
1884 ifa = NULL;
1885 done:
1886 return (ifa);
1887 }
1888
1889 /*
1890 * Locate the point to point interface with a given destination address.
1891 */
1892 /*ARGSUSED*/
1893 struct ifaddr *
ifa_ifwithdstaddr(const struct sockaddr * addr,int fibnum)1894 ifa_ifwithdstaddr(const struct sockaddr *addr, int fibnum)
1895 {
1896 struct ifnet *ifp;
1897 struct ifaddr *ifa;
1898
1899 NET_EPOCH_ASSERT();
1900 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1901 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
1902 continue;
1903 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1904 continue;
1905 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1906 if (ifa->ifa_addr->sa_family != addr->sa_family)
1907 continue;
1908 if (ifa->ifa_dstaddr != NULL &&
1909 sa_equal(addr, ifa->ifa_dstaddr)) {
1910 goto done;
1911 }
1912 }
1913 }
1914 ifa = NULL;
1915 done:
1916 return (ifa);
1917 }
1918
1919 /*
1920 * Find an interface on a specific network. If many, choice
1921 * is most specific found.
1922 */
1923 struct ifaddr *
ifa_ifwithnet(const struct sockaddr * addr,int ignore_ptp,int fibnum)1924 ifa_ifwithnet(const struct sockaddr *addr, int ignore_ptp, int fibnum)
1925 {
1926 struct ifnet *ifp;
1927 struct ifaddr *ifa;
1928 struct ifaddr *ifa_maybe = NULL;
1929 u_int af = addr->sa_family;
1930 const char *addr_data = addr->sa_data, *cplim;
1931
1932 NET_EPOCH_ASSERT();
1933 /*
1934 * AF_LINK addresses can be looked up directly by their index number,
1935 * so do that if we can.
1936 */
1937 if (af == AF_LINK) {
1938 ifp = ifnet_byindex(
1939 ((const struct sockaddr_dl *)addr)->sdl_index);
1940 return (ifp ? ifp->if_addr : NULL);
1941 }
1942
1943 /*
1944 * Scan though each interface, looking for ones that have addresses
1945 * in this address family and the requested fib.
1946 */
1947 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1948 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1949 continue;
1950 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1951 const char *cp, *cp2, *cp3;
1952
1953 if (ifa->ifa_addr->sa_family != af)
1954 next: continue;
1955 if (af == AF_INET &&
1956 ifp->if_flags & IFF_POINTOPOINT && !ignore_ptp) {
1957 /*
1958 * This is a bit broken as it doesn't
1959 * take into account that the remote end may
1960 * be a single node in the network we are
1961 * looking for.
1962 * The trouble is that we don't know the
1963 * netmask for the remote end.
1964 */
1965 if (ifa->ifa_dstaddr != NULL &&
1966 sa_equal(addr, ifa->ifa_dstaddr)) {
1967 goto done;
1968 }
1969 } else {
1970 /*
1971 * Scan all the bits in the ifa's address.
1972 * If a bit dissagrees with what we are
1973 * looking for, mask it with the netmask
1974 * to see if it really matters.
1975 * (A byte at a time)
1976 */
1977 if (ifa->ifa_netmask == 0)
1978 continue;
1979 cp = addr_data;
1980 cp2 = ifa->ifa_addr->sa_data;
1981 cp3 = ifa->ifa_netmask->sa_data;
1982 cplim = ifa->ifa_netmask->sa_len
1983 + (char *)ifa->ifa_netmask;
1984 while (cp3 < cplim)
1985 if ((*cp++ ^ *cp2++) & *cp3++)
1986 goto next; /* next address! */
1987 /*
1988 * If the netmask of what we just found
1989 * is more specific than what we had before
1990 * (if we had one), or if the virtual status
1991 * of new prefix is better than of the old one,
1992 * then remember the new one before continuing
1993 * to search for an even better one.
1994 */
1995 if (ifa_maybe == NULL ||
1996 ifa_preferred(ifa_maybe, ifa) ||
1997 rn_refines((caddr_t)ifa->ifa_netmask,
1998 (caddr_t)ifa_maybe->ifa_netmask)) {
1999 ifa_maybe = ifa;
2000 }
2001 }
2002 }
2003 }
2004 ifa = ifa_maybe;
2005 ifa_maybe = NULL;
2006 done:
2007 return (ifa);
2008 }
2009
2010 /*
2011 * Find an interface address specific to an interface best matching
2012 * a given address.
2013 */
2014 struct ifaddr *
ifaof_ifpforaddr(const struct sockaddr * addr,struct ifnet * ifp)2015 ifaof_ifpforaddr(const struct sockaddr *addr, struct ifnet *ifp)
2016 {
2017 struct ifaddr *ifa;
2018 const char *cp, *cp2, *cp3;
2019 char *cplim;
2020 struct ifaddr *ifa_maybe = NULL;
2021 u_int af = addr->sa_family;
2022
2023 if (af >= AF_MAX)
2024 return (NULL);
2025
2026 NET_EPOCH_ASSERT();
2027 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2028 if (ifa->ifa_addr->sa_family != af)
2029 continue;
2030 if (ifa_maybe == NULL)
2031 ifa_maybe = ifa;
2032 if (ifa->ifa_netmask == 0) {
2033 if (sa_equal(addr, ifa->ifa_addr) ||
2034 (ifa->ifa_dstaddr &&
2035 sa_equal(addr, ifa->ifa_dstaddr)))
2036 goto done;
2037 continue;
2038 }
2039 if (ifp->if_flags & IFF_POINTOPOINT) {
2040 if (ifa->ifa_dstaddr && sa_equal(addr, ifa->ifa_dstaddr))
2041 goto done;
2042 } else {
2043 cp = addr->sa_data;
2044 cp2 = ifa->ifa_addr->sa_data;
2045 cp3 = ifa->ifa_netmask->sa_data;
2046 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
2047 for (; cp3 < cplim; cp3++)
2048 if ((*cp++ ^ *cp2++) & *cp3)
2049 break;
2050 if (cp3 == cplim)
2051 goto done;
2052 }
2053 }
2054 ifa = ifa_maybe;
2055 done:
2056 return (ifa);
2057 }
2058
2059 /*
2060 * See whether new ifa is better than current one:
2061 * 1) A non-virtual one is preferred over virtual.
2062 * 2) A virtual in master state preferred over any other state.
2063 *
2064 * Used in several address selecting functions.
2065 */
2066 int
ifa_preferred(struct ifaddr * cur,struct ifaddr * next)2067 ifa_preferred(struct ifaddr *cur, struct ifaddr *next)
2068 {
2069
2070 return (cur->ifa_carp && (!next->ifa_carp ||
2071 ((*carp_master_p)(next) && !(*carp_master_p)(cur))));
2072 }
2073
2074 struct sockaddr_dl *
link_alloc_sdl(size_t size,int flags)2075 link_alloc_sdl(size_t size, int flags)
2076 {
2077
2078 return (malloc(size, M_TEMP, flags));
2079 }
2080
2081 void
link_free_sdl(struct sockaddr * sa)2082 link_free_sdl(struct sockaddr *sa)
2083 {
2084 free(sa, M_TEMP);
2085 }
2086
2087 /*
2088 * Fills in given sdl with interface basic info.
2089 * Returns pointer to filled sdl.
2090 */
2091 struct sockaddr_dl *
link_init_sdl(struct ifnet * ifp,struct sockaddr * paddr,u_char iftype)2092 link_init_sdl(struct ifnet *ifp, struct sockaddr *paddr, u_char iftype)
2093 {
2094 struct sockaddr_dl *sdl;
2095
2096 sdl = (struct sockaddr_dl *)paddr;
2097 memset(sdl, 0, sizeof(struct sockaddr_dl));
2098 sdl->sdl_len = sizeof(struct sockaddr_dl);
2099 sdl->sdl_family = AF_LINK;
2100 sdl->sdl_index = ifp->if_index;
2101 sdl->sdl_type = iftype;
2102
2103 return (sdl);
2104 }
2105
2106 /*
2107 * Mark an interface down and notify protocols of
2108 * the transition.
2109 */
2110 static void
if_unroute(struct ifnet * ifp,int flag,int fam)2111 if_unroute(struct ifnet *ifp, int flag, int fam)
2112 {
2113
2114 KASSERT(flag == IFF_UP, ("if_unroute: flag != IFF_UP"));
2115
2116 ifp->if_flags &= ~flag;
2117 getmicrotime(&ifp->if_lastchange);
2118 ifp->if_qflush(ifp);
2119
2120 if (ifp->if_carp)
2121 (*carp_linkstate_p)(ifp);
2122 rt_ifmsg(ifp, IFF_UP);
2123 }
2124
2125 void (*vlan_link_state_p)(struct ifnet *); /* XXX: private from if_vlan */
2126 void (*vlan_trunk_cap_p)(struct ifnet *); /* XXX: private from if_vlan */
2127 struct ifnet *(*vlan_trunkdev_p)(struct ifnet *);
2128 struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t);
2129 int (*vlan_tag_p)(struct ifnet *, uint16_t *);
2130 int (*vlan_pcp_p)(struct ifnet *, uint16_t *);
2131 int (*vlan_setcookie_p)(struct ifnet *, void *);
2132 void *(*vlan_cookie_p)(struct ifnet *);
2133
2134 /*
2135 * Handle a change in the interface link state. To avoid LORs
2136 * between driver lock and upper layer locks, as well as possible
2137 * recursions, we post event to taskqueue, and all job
2138 * is done in static do_link_state_change().
2139 */
2140 void
if_link_state_change(struct ifnet * ifp,int link_state)2141 if_link_state_change(struct ifnet *ifp, int link_state)
2142 {
2143 /* Return if state hasn't changed. */
2144 if (ifp->if_link_state == link_state)
2145 return;
2146
2147 ifp->if_link_state = link_state;
2148
2149 /* XXXGL: reference ifp? */
2150 taskqueue_enqueue(taskqueue_swi, &ifp->if_linktask);
2151 }
2152
2153 static void
do_link_state_change(void * arg,int pending)2154 do_link_state_change(void *arg, int pending)
2155 {
2156 struct ifnet *ifp;
2157 int link_state;
2158
2159 ifp = arg;
2160 link_state = ifp->if_link_state;
2161
2162 CURVNET_SET(ifp->if_vnet);
2163 rt_ifmsg(ifp, 0);
2164 if (ifp->if_vlantrunk != NULL)
2165 (*vlan_link_state_p)(ifp);
2166
2167 if ((ifp->if_type == IFT_ETHER || ifp->if_type == IFT_L2VLAN) &&
2168 ifp->if_l2com != NULL)
2169 (*ng_ether_link_state_p)(ifp, link_state);
2170 if (ifp->if_carp)
2171 (*carp_linkstate_p)(ifp);
2172 if (ifp->if_bridge)
2173 ifp->if_bridge_linkstate(ifp);
2174 if (ifp->if_lagg)
2175 (*lagg_linkstate_p)(ifp, link_state);
2176
2177 if (IS_DEFAULT_VNET(curvnet))
2178 devctl_notify("IFNET", ifp->if_xname,
2179 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN",
2180 NULL);
2181 if (pending > 1)
2182 if_printf(ifp, "%d link states coalesced\n", pending);
2183 if (log_link_state_change)
2184 if_printf(ifp, "link state changed to %s\n",
2185 (link_state == LINK_STATE_UP) ? "UP" : "DOWN" );
2186 EVENTHANDLER_INVOKE(ifnet_link_event, ifp, link_state);
2187 CURVNET_RESTORE();
2188 }
2189
2190 /*
2191 * Mark an interface down and notify protocols of
2192 * the transition.
2193 */
2194 void
if_down(struct ifnet * ifp)2195 if_down(struct ifnet *ifp)
2196 {
2197
2198 EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_DOWN);
2199 if_unroute(ifp, IFF_UP, AF_UNSPEC);
2200 }
2201
2202 /*
2203 * Mark an interface up and notify protocols of
2204 * the transition.
2205 */
2206 void
if_up(struct ifnet * ifp)2207 if_up(struct ifnet *ifp)
2208 {
2209
2210 ifp->if_flags |= IFF_UP;
2211 getmicrotime(&ifp->if_lastchange);
2212 if (ifp->if_carp)
2213 (*carp_linkstate_p)(ifp);
2214 rt_ifmsg(ifp, IFF_UP);
2215 EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_UP);
2216 }
2217
2218 /*
2219 * Flush an interface queue.
2220 */
2221 void
if_qflush(struct ifnet * ifp)2222 if_qflush(struct ifnet *ifp)
2223 {
2224 struct mbuf *m, *n;
2225 struct ifaltq *ifq;
2226
2227 ifq = &ifp->if_snd;
2228 IFQ_LOCK(ifq);
2229 #ifdef ALTQ
2230 if (ALTQ_IS_ENABLED(ifq))
2231 ALTQ_PURGE(ifq);
2232 #endif
2233 n = ifq->ifq_head;
2234 while ((m = n) != NULL) {
2235 n = m->m_nextpkt;
2236 m_freem(m);
2237 }
2238 ifq->ifq_head = 0;
2239 ifq->ifq_tail = 0;
2240 ifq->ifq_len = 0;
2241 IFQ_UNLOCK(ifq);
2242 }
2243
2244 /*
2245 * Map interface name to interface structure pointer, with or without
2246 * returning a reference.
2247 */
2248 struct ifnet *
ifunit_ref(const char * name)2249 ifunit_ref(const char *name)
2250 {
2251 struct epoch_tracker et;
2252 struct ifnet *ifp;
2253
2254 NET_EPOCH_ENTER(et);
2255 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2256 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0 &&
2257 !(ifp->if_flags & IFF_DYING))
2258 break;
2259 }
2260 if (ifp != NULL) {
2261 if_ref(ifp);
2262 MPASS(ifindex_table[ifp->if_index].ife_ifnet == ifp);
2263 }
2264
2265 NET_EPOCH_EXIT(et);
2266 return (ifp);
2267 }
2268
2269 struct ifnet *
ifunit(const char * name)2270 ifunit(const char *name)
2271 {
2272 struct epoch_tracker et;
2273 struct ifnet *ifp;
2274
2275 NET_EPOCH_ENTER(et);
2276 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2277 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0)
2278 break;
2279 }
2280 NET_EPOCH_EXIT(et);
2281 return (ifp);
2282 }
2283
2284 void *
ifr_buffer_get_buffer(void * data)2285 ifr_buffer_get_buffer(void *data)
2286 {
2287 union ifreq_union *ifrup;
2288
2289 ifrup = data;
2290 #ifdef COMPAT_FREEBSD32
2291 if (SV_CURPROC_FLAG(SV_ILP32))
2292 return ((void *)(uintptr_t)
2293 ifrup->ifr32.ifr_ifru.ifru_buffer.buffer);
2294 #endif
2295 return (ifrup->ifr.ifr_ifru.ifru_buffer.buffer);
2296 }
2297
2298 static void
ifr_buffer_set_buffer_null(void * data)2299 ifr_buffer_set_buffer_null(void *data)
2300 {
2301 union ifreq_union *ifrup;
2302
2303 ifrup = data;
2304 #ifdef COMPAT_FREEBSD32
2305 if (SV_CURPROC_FLAG(SV_ILP32))
2306 ifrup->ifr32.ifr_ifru.ifru_buffer.buffer = 0;
2307 else
2308 #endif
2309 ifrup->ifr.ifr_ifru.ifru_buffer.buffer = NULL;
2310 }
2311
2312 size_t
ifr_buffer_get_length(void * data)2313 ifr_buffer_get_length(void *data)
2314 {
2315 union ifreq_union *ifrup;
2316
2317 ifrup = data;
2318 #ifdef COMPAT_FREEBSD32
2319 if (SV_CURPROC_FLAG(SV_ILP32))
2320 return (ifrup->ifr32.ifr_ifru.ifru_buffer.length);
2321 #endif
2322 return (ifrup->ifr.ifr_ifru.ifru_buffer.length);
2323 }
2324
2325 static void
ifr_buffer_set_length(void * data,size_t len)2326 ifr_buffer_set_length(void *data, size_t len)
2327 {
2328 union ifreq_union *ifrup;
2329
2330 ifrup = data;
2331 #ifdef COMPAT_FREEBSD32
2332 if (SV_CURPROC_FLAG(SV_ILP32))
2333 ifrup->ifr32.ifr_ifru.ifru_buffer.length = len;
2334 else
2335 #endif
2336 ifrup->ifr.ifr_ifru.ifru_buffer.length = len;
2337 }
2338
2339 void *
ifr_data_get_ptr(void * ifrp)2340 ifr_data_get_ptr(void *ifrp)
2341 {
2342 union ifreq_union *ifrup;
2343
2344 ifrup = ifrp;
2345 #ifdef COMPAT_FREEBSD32
2346 if (SV_CURPROC_FLAG(SV_ILP32))
2347 return ((void *)(uintptr_t)
2348 ifrup->ifr32.ifr_ifru.ifru_data);
2349 #endif
2350 return (ifrup->ifr.ifr_ifru.ifru_data);
2351 }
2352
2353 struct ifcap_nv_bit_name {
2354 uint64_t cap_bit;
2355 const char *cap_name;
2356 };
2357 #define CAPNV(x) {.cap_bit = IFCAP_##x, \
2358 .cap_name = __CONCAT(IFCAP_, __CONCAT(x, _NAME)) }
2359 const struct ifcap_nv_bit_name ifcap_nv_bit_names[] = {
2360 CAPNV(RXCSUM),
2361 CAPNV(TXCSUM),
2362 CAPNV(NETCONS),
2363 CAPNV(VLAN_MTU),
2364 CAPNV(VLAN_HWTAGGING),
2365 CAPNV(JUMBO_MTU),
2366 CAPNV(POLLING),
2367 CAPNV(VLAN_HWCSUM),
2368 CAPNV(TSO4),
2369 CAPNV(TSO6),
2370 CAPNV(LRO),
2371 CAPNV(WOL_UCAST),
2372 CAPNV(WOL_MCAST),
2373 CAPNV(WOL_MAGIC),
2374 CAPNV(TOE4),
2375 CAPNV(TOE6),
2376 CAPNV(VLAN_HWFILTER),
2377 CAPNV(VLAN_HWTSO),
2378 CAPNV(LINKSTATE),
2379 CAPNV(NETMAP),
2380 CAPNV(RXCSUM_IPV6),
2381 CAPNV(TXCSUM_IPV6),
2382 CAPNV(HWSTATS),
2383 CAPNV(TXRTLMT),
2384 CAPNV(HWRXTSTMP),
2385 CAPNV(MEXTPG),
2386 CAPNV(TXTLS4),
2387 CAPNV(TXTLS6),
2388 CAPNV(VXLAN_HWCSUM),
2389 CAPNV(VXLAN_HWTSO),
2390 CAPNV(TXTLS_RTLMT),
2391 {0, NULL}
2392 };
2393 #define CAP2NV(x) {.cap_bit = IFCAP2_BIT(IFCAP2_##x), \
2394 .cap_name = __CONCAT(IFCAP2_, __CONCAT(x, _NAME)) }
2395 const struct ifcap_nv_bit_name ifcap2_nv_bit_names[] = {
2396 CAP2NV(RXTLS4),
2397 CAP2NV(RXTLS6),
2398 {0, NULL}
2399 };
2400 #undef CAPNV
2401 #undef CAP2NV
2402
2403 int
if_capnv_to_capint(const nvlist_t * nv,int * old_cap,const struct ifcap_nv_bit_name * nn,bool all)2404 if_capnv_to_capint(const nvlist_t *nv, int *old_cap,
2405 const struct ifcap_nv_bit_name *nn, bool all)
2406 {
2407 int i, res;
2408
2409 res = 0;
2410 for (i = 0; nn[i].cap_name != NULL; i++) {
2411 if (nvlist_exists_bool(nv, nn[i].cap_name)) {
2412 if (all || nvlist_get_bool(nv, nn[i].cap_name))
2413 res |= nn[i].cap_bit;
2414 } else {
2415 res |= *old_cap & nn[i].cap_bit;
2416 }
2417 }
2418 return (res);
2419 }
2420
2421 void
if_capint_to_capnv(nvlist_t * nv,const struct ifcap_nv_bit_name * nn,int ifr_cap,int ifr_req)2422 if_capint_to_capnv(nvlist_t *nv, const struct ifcap_nv_bit_name *nn,
2423 int ifr_cap, int ifr_req)
2424 {
2425 int i;
2426
2427 for (i = 0; nn[i].cap_name != NULL; i++) {
2428 if ((nn[i].cap_bit & ifr_cap) != 0) {
2429 nvlist_add_bool(nv, nn[i].cap_name,
2430 (nn[i].cap_bit & ifr_req) != 0);
2431 }
2432 }
2433 }
2434
2435 /*
2436 * Hardware specific interface ioctls.
2437 */
2438 int
ifhwioctl(u_long cmd,struct ifnet * ifp,caddr_t data,struct thread * td)2439 ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td)
2440 {
2441 struct ifreq *ifr;
2442 int error = 0, do_ifup = 0;
2443 int new_flags, temp_flags;
2444 size_t descrlen, nvbuflen;
2445 char *descrbuf;
2446 char new_name[IFNAMSIZ];
2447 void *buf;
2448 nvlist_t *nvcap;
2449 struct siocsifcapnv_driver_data drv_ioctl_data;
2450
2451 ifr = (struct ifreq *)data;
2452 switch (cmd) {
2453 case SIOCGIFINDEX:
2454 ifr->ifr_index = ifp->if_index;
2455 break;
2456
2457 case SIOCGIFFLAGS:
2458 temp_flags = ifp->if_flags | ifp->if_drv_flags;
2459 ifr->ifr_flags = temp_flags & 0xffff;
2460 ifr->ifr_flagshigh = temp_flags >> 16;
2461 break;
2462
2463 case SIOCGIFCAP:
2464 ifr->ifr_reqcap = ifp->if_capabilities;
2465 ifr->ifr_curcap = ifp->if_capenable;
2466 break;
2467
2468 case SIOCGIFCAPNV:
2469 if ((ifp->if_capabilities & IFCAP_NV) == 0) {
2470 error = EINVAL;
2471 break;
2472 }
2473 buf = NULL;
2474 nvcap = nvlist_create(0);
2475 for (;;) {
2476 if_capint_to_capnv(nvcap, ifcap_nv_bit_names,
2477 ifp->if_capabilities, ifp->if_capenable);
2478 if_capint_to_capnv(nvcap, ifcap2_nv_bit_names,
2479 ifp->if_capabilities2, ifp->if_capenable2);
2480 error = (*ifp->if_ioctl)(ifp, SIOCGIFCAPNV,
2481 __DECONST(caddr_t, nvcap));
2482 if (error != 0) {
2483 if_printf(ifp,
2484 "SIOCGIFCAPNV driver mistake: nvlist error %d\n",
2485 error);
2486 break;
2487 }
2488 buf = nvlist_pack(nvcap, &nvbuflen);
2489 if (buf == NULL) {
2490 error = nvlist_error(nvcap);
2491 if (error == 0)
2492 error = EDOOFUS;
2493 break;
2494 }
2495 if (nvbuflen > ifr->ifr_cap_nv.buf_length) {
2496 ifr->ifr_cap_nv.length = nvbuflen;
2497 ifr->ifr_cap_nv.buffer = NULL;
2498 error = EFBIG;
2499 break;
2500 }
2501 ifr->ifr_cap_nv.length = nvbuflen;
2502 error = copyout(buf, ifr->ifr_cap_nv.buffer, nvbuflen);
2503 break;
2504 }
2505 free(buf, M_NVLIST);
2506 nvlist_destroy(nvcap);
2507 break;
2508
2509 case SIOCGIFDATA:
2510 {
2511 struct if_data ifd;
2512
2513 /* Ensure uninitialised padding is not leaked. */
2514 memset(&ifd, 0, sizeof(ifd));
2515
2516 if_data_copy(ifp, &ifd);
2517 error = copyout(&ifd, ifr_data_get_ptr(ifr), sizeof(ifd));
2518 break;
2519 }
2520
2521 #ifdef MAC
2522 case SIOCGIFMAC:
2523 error = mac_ifnet_ioctl_get(td->td_ucred, ifr, ifp);
2524 break;
2525 #endif
2526
2527 case SIOCGIFMETRIC:
2528 ifr->ifr_metric = ifp->if_metric;
2529 break;
2530
2531 case SIOCGIFMTU:
2532 ifr->ifr_mtu = ifp->if_mtu;
2533 break;
2534
2535 case SIOCGIFPHYS:
2536 /* XXXGL: did this ever worked? */
2537 ifr->ifr_phys = 0;
2538 break;
2539
2540 case SIOCGIFDESCR:
2541 error = 0;
2542 sx_slock(&ifdescr_sx);
2543 if (ifp->if_description == NULL)
2544 error = ENOMSG;
2545 else {
2546 /* space for terminating nul */
2547 descrlen = strlen(ifp->if_description) + 1;
2548 if (ifr_buffer_get_length(ifr) < descrlen)
2549 ifr_buffer_set_buffer_null(ifr);
2550 else
2551 error = copyout(ifp->if_description,
2552 ifr_buffer_get_buffer(ifr), descrlen);
2553 ifr_buffer_set_length(ifr, descrlen);
2554 }
2555 sx_sunlock(&ifdescr_sx);
2556 break;
2557
2558 case SIOCSIFDESCR:
2559 error = priv_check(td, PRIV_NET_SETIFDESCR);
2560 if (error)
2561 return (error);
2562
2563 /*
2564 * Copy only (length-1) bytes to make sure that
2565 * if_description is always nul terminated. The
2566 * length parameter is supposed to count the
2567 * terminating nul in.
2568 */
2569 if (ifr_buffer_get_length(ifr) > ifdescr_maxlen)
2570 return (ENAMETOOLONG);
2571 else if (ifr_buffer_get_length(ifr) == 0)
2572 descrbuf = NULL;
2573 else {
2574 descrbuf = if_allocdescr(ifr_buffer_get_length(ifr), M_WAITOK);
2575 error = copyin(ifr_buffer_get_buffer(ifr), descrbuf,
2576 ifr_buffer_get_length(ifr) - 1);
2577 if (error) {
2578 if_freedescr(descrbuf);
2579 break;
2580 }
2581 }
2582
2583 if_setdescr(ifp, descrbuf);
2584 getmicrotime(&ifp->if_lastchange);
2585 break;
2586
2587 case SIOCGIFFIB:
2588 ifr->ifr_fib = ifp->if_fib;
2589 break;
2590
2591 case SIOCSIFFIB:
2592 error = priv_check(td, PRIV_NET_SETIFFIB);
2593 if (error)
2594 return (error);
2595 if (ifr->ifr_fib >= rt_numfibs)
2596 return (EINVAL);
2597
2598 ifp->if_fib = ifr->ifr_fib;
2599 break;
2600
2601 case SIOCSIFFLAGS:
2602 error = priv_check(td, PRIV_NET_SETIFFLAGS);
2603 if (error)
2604 return (error);
2605 /*
2606 * Currently, no driver owned flags pass the IFF_CANTCHANGE
2607 * check, so we don't need special handling here yet.
2608 */
2609 new_flags = (ifr->ifr_flags & 0xffff) |
2610 (ifr->ifr_flagshigh << 16);
2611 if (ifp->if_flags & IFF_UP &&
2612 (new_flags & IFF_UP) == 0) {
2613 if_down(ifp);
2614 } else if (new_flags & IFF_UP &&
2615 (ifp->if_flags & IFF_UP) == 0) {
2616 do_ifup = 1;
2617 }
2618
2619 /*
2620 * See if the promiscuous mode or allmulti bits are about to
2621 * flip. They require special handling because in-kernel
2622 * consumers may indepdently toggle them.
2623 */
2624 if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) {
2625 if (new_flags & IFF_PPROMISC)
2626 ifp->if_flags |= IFF_PROMISC;
2627 else if (ifp->if_pcount == 0)
2628 ifp->if_flags &= ~IFF_PROMISC;
2629 if (log_promisc_mode_change)
2630 if_printf(ifp, "permanently promiscuous mode %s\n",
2631 ((new_flags & IFF_PPROMISC) ?
2632 "enabled" : "disabled"));
2633 }
2634 if ((ifp->if_flags ^ new_flags) & IFF_PALLMULTI) {
2635 if (new_flags & IFF_PALLMULTI)
2636 ifp->if_flags |= IFF_ALLMULTI;
2637 else if (ifp->if_amcount == 0)
2638 ifp->if_flags &= ~IFF_ALLMULTI;
2639 }
2640 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
2641 (new_flags &~ IFF_CANTCHANGE);
2642 if (ifp->if_ioctl) {
2643 (void) (*ifp->if_ioctl)(ifp, cmd, data);
2644 }
2645 if (do_ifup)
2646 if_up(ifp);
2647 getmicrotime(&ifp->if_lastchange);
2648 break;
2649
2650 case SIOCSIFCAP:
2651 error = priv_check(td, PRIV_NET_SETIFCAP);
2652 if (error != 0)
2653 return (error);
2654 if (ifp->if_ioctl == NULL)
2655 return (EOPNOTSUPP);
2656 if (ifr->ifr_reqcap & ~ifp->if_capabilities)
2657 return (EINVAL);
2658 error = (*ifp->if_ioctl)(ifp, cmd, data);
2659 if (error == 0)
2660 getmicrotime(&ifp->if_lastchange);
2661 break;
2662
2663 case SIOCSIFCAPNV:
2664 error = priv_check(td, PRIV_NET_SETIFCAP);
2665 if (error != 0)
2666 return (error);
2667 if (ifp->if_ioctl == NULL)
2668 return (EOPNOTSUPP);
2669 if ((ifp->if_capabilities & IFCAP_NV) == 0)
2670 return (EINVAL);
2671 if (ifr->ifr_cap_nv.length > IFR_CAP_NV_MAXBUFSIZE)
2672 return (EINVAL);
2673 nvcap = NULL;
2674 buf = malloc(ifr->ifr_cap_nv.length, M_TEMP, M_WAITOK);
2675 for (;;) {
2676 error = copyin(ifr->ifr_cap_nv.buffer, buf,
2677 ifr->ifr_cap_nv.length);
2678 if (error != 0)
2679 break;
2680 nvcap = nvlist_unpack(buf, ifr->ifr_cap_nv.length, 0);
2681 if (nvcap == NULL) {
2682 error = EINVAL;
2683 break;
2684 }
2685 drv_ioctl_data.reqcap = if_capnv_to_capint(nvcap,
2686 &ifp->if_capenable, ifcap_nv_bit_names, false);
2687 if ((drv_ioctl_data.reqcap &
2688 ~ifp->if_capabilities) != 0) {
2689 error = EINVAL;
2690 break;
2691 }
2692 drv_ioctl_data.reqcap2 = if_capnv_to_capint(nvcap,
2693 &ifp->if_capenable2, ifcap2_nv_bit_names, false);
2694 if ((drv_ioctl_data.reqcap2 &
2695 ~ifp->if_capabilities2) != 0) {
2696 error = EINVAL;
2697 break;
2698 }
2699 drv_ioctl_data.nvcap = nvcap;
2700 error = (*ifp->if_ioctl)(ifp, SIOCSIFCAPNV,
2701 (caddr_t)&drv_ioctl_data);
2702 break;
2703 }
2704 nvlist_destroy(nvcap);
2705 free(buf, M_TEMP);
2706 if (error == 0)
2707 getmicrotime(&ifp->if_lastchange);
2708 break;
2709
2710 #ifdef MAC
2711 case SIOCSIFMAC:
2712 error = mac_ifnet_ioctl_set(td->td_ucred, ifr, ifp);
2713 break;
2714 #endif
2715
2716 case SIOCSIFNAME:
2717 error = priv_check(td, PRIV_NET_SETIFNAME);
2718 if (error)
2719 return (error);
2720 error = copyinstr(ifr_data_get_ptr(ifr), new_name, IFNAMSIZ,
2721 NULL);
2722 if (error != 0)
2723 return (error);
2724 error = if_rename(ifp, new_name);
2725 break;
2726
2727 #ifdef VIMAGE
2728 case SIOCSIFVNET:
2729 error = priv_check(td, PRIV_NET_SETIFVNET);
2730 if (error)
2731 return (error);
2732 error = if_vmove_loan(td, ifp, ifr->ifr_name, ifr->ifr_jid);
2733 break;
2734 #endif
2735
2736 case SIOCSIFMETRIC:
2737 error = priv_check(td, PRIV_NET_SETIFMETRIC);
2738 if (error)
2739 return (error);
2740 ifp->if_metric = ifr->ifr_metric;
2741 getmicrotime(&ifp->if_lastchange);
2742 break;
2743
2744 case SIOCSIFPHYS:
2745 error = priv_check(td, PRIV_NET_SETIFPHYS);
2746 if (error)
2747 return (error);
2748 if (ifp->if_ioctl == NULL)
2749 return (EOPNOTSUPP);
2750 error = (*ifp->if_ioctl)(ifp, cmd, data);
2751 if (error == 0)
2752 getmicrotime(&ifp->if_lastchange);
2753 break;
2754
2755 case SIOCSIFMTU:
2756 {
2757 u_long oldmtu = ifp->if_mtu;
2758
2759 error = priv_check(td, PRIV_NET_SETIFMTU);
2760 if (error)
2761 return (error);
2762 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU)
2763 return (EINVAL);
2764 if (ifp->if_ioctl == NULL)
2765 return (EOPNOTSUPP);
2766 /* Disallow MTU changes on bridge member interfaces. */
2767 if (ifp->if_bridge)
2768 return (EOPNOTSUPP);
2769 error = (*ifp->if_ioctl)(ifp, cmd, data);
2770 if (error == 0) {
2771 getmicrotime(&ifp->if_lastchange);
2772 rt_ifmsg(ifp, 0);
2773 #ifdef INET
2774 DEBUGNET_NOTIFY_MTU(ifp);
2775 #endif
2776 }
2777 /*
2778 * If the link MTU changed, do network layer specific procedure.
2779 */
2780 if (ifp->if_mtu != oldmtu)
2781 if_notifymtu(ifp);
2782 break;
2783 }
2784
2785 case SIOCADDMULTI:
2786 case SIOCDELMULTI:
2787 if (cmd == SIOCADDMULTI)
2788 error = priv_check(td, PRIV_NET_ADDMULTI);
2789 else
2790 error = priv_check(td, PRIV_NET_DELMULTI);
2791 if (error)
2792 return (error);
2793
2794 /* Don't allow group membership on non-multicast interfaces. */
2795 if ((ifp->if_flags & IFF_MULTICAST) == 0)
2796 return (EOPNOTSUPP);
2797
2798 /* Don't let users screw up protocols' entries. */
2799 if (ifr->ifr_addr.sa_family != AF_LINK)
2800 return (EINVAL);
2801
2802 if (cmd == SIOCADDMULTI) {
2803 struct epoch_tracker et;
2804 struct ifmultiaddr *ifma;
2805
2806 /*
2807 * Userland is only permitted to join groups once
2808 * via the if_addmulti() KPI, because it cannot hold
2809 * struct ifmultiaddr * between calls. It may also
2810 * lose a race while we check if the membership
2811 * already exists.
2812 */
2813 NET_EPOCH_ENTER(et);
2814 ifma = if_findmulti(ifp, &ifr->ifr_addr);
2815 NET_EPOCH_EXIT(et);
2816 if (ifma != NULL)
2817 error = EADDRINUSE;
2818 else
2819 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma);
2820 } else {
2821 error = if_delmulti(ifp, &ifr->ifr_addr);
2822 }
2823 if (error == 0)
2824 getmicrotime(&ifp->if_lastchange);
2825 break;
2826
2827 case SIOCSIFPHYADDR:
2828 case SIOCDIFPHYADDR:
2829 #ifdef INET6
2830 case SIOCSIFPHYADDR_IN6:
2831 #endif
2832 case SIOCSIFMEDIA:
2833 case SIOCSIFGENERIC:
2834 error = priv_check(td, PRIV_NET_HWIOCTL);
2835 if (error)
2836 return (error);
2837 if (ifp->if_ioctl == NULL)
2838 return (EOPNOTSUPP);
2839 error = (*ifp->if_ioctl)(ifp, cmd, data);
2840 if (error == 0)
2841 getmicrotime(&ifp->if_lastchange);
2842 break;
2843
2844 case SIOCGIFSTATUS:
2845 case SIOCGIFPSRCADDR:
2846 case SIOCGIFPDSTADDR:
2847 case SIOCGIFMEDIA:
2848 case SIOCGIFXMEDIA:
2849 case SIOCGIFGENERIC:
2850 case SIOCGIFRSSKEY:
2851 case SIOCGIFRSSHASH:
2852 case SIOCGIFDOWNREASON:
2853 if (ifp->if_ioctl == NULL)
2854 return (EOPNOTSUPP);
2855 error = (*ifp->if_ioctl)(ifp, cmd, data);
2856 break;
2857
2858 case SIOCSIFLLADDR:
2859 error = priv_check(td, PRIV_NET_SETLLADDR);
2860 if (error)
2861 return (error);
2862 error = if_setlladdr(ifp,
2863 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len);
2864 break;
2865
2866 case SIOCGHWADDR:
2867 error = if_gethwaddr(ifp, ifr);
2868 break;
2869
2870 case SIOCAIFGROUP:
2871 error = priv_check(td, PRIV_NET_ADDIFGROUP);
2872 if (error)
2873 return (error);
2874 error = if_addgroup(ifp,
2875 ((struct ifgroupreq *)data)->ifgr_group);
2876 if (error != 0)
2877 return (error);
2878 break;
2879
2880 case SIOCGIFGROUP:
2881 {
2882 struct epoch_tracker et;
2883
2884 NET_EPOCH_ENTER(et);
2885 error = if_getgroup((struct ifgroupreq *)data, ifp);
2886 NET_EPOCH_EXIT(et);
2887 break;
2888 }
2889
2890 case SIOCDIFGROUP:
2891 error = priv_check(td, PRIV_NET_DELIFGROUP);
2892 if (error)
2893 return (error);
2894 error = if_delgroup(ifp,
2895 ((struct ifgroupreq *)data)->ifgr_group);
2896 if (error != 0)
2897 return (error);
2898 break;
2899
2900 default:
2901 error = ENOIOCTL;
2902 break;
2903 }
2904 return (error);
2905 }
2906
2907 /*
2908 * Interface ioctls.
2909 */
2910 int
ifioctl(struct socket * so,u_long cmd,caddr_t data,struct thread * td)2911 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td)
2912 {
2913 #ifdef COMPAT_FREEBSD32
2914 union {
2915 struct ifconf ifc;
2916 struct ifdrv ifd;
2917 struct ifgroupreq ifgr;
2918 struct ifmediareq ifmr;
2919 } thunk;
2920 u_long saved_cmd;
2921 struct ifconf32 *ifc32;
2922 struct ifdrv32 *ifd32;
2923 struct ifgroupreq32 *ifgr32;
2924 struct ifmediareq32 *ifmr32;
2925 #endif
2926 struct ifnet *ifp;
2927 struct ifreq *ifr;
2928 int error;
2929 int oif_flags;
2930 #ifdef VIMAGE
2931 bool shutdown;
2932 #endif
2933
2934 CURVNET_SET(so->so_vnet);
2935 #ifdef VIMAGE
2936 /* Make sure the VNET is stable. */
2937 shutdown = VNET_IS_SHUTTING_DOWN(so->so_vnet);
2938 if (shutdown) {
2939 CURVNET_RESTORE();
2940 return (EBUSY);
2941 }
2942 #endif
2943
2944 #ifdef COMPAT_FREEBSD32
2945 saved_cmd = cmd;
2946 switch (cmd) {
2947 case SIOCGIFCONF32:
2948 ifc32 = (struct ifconf32 *)data;
2949 thunk.ifc.ifc_len = ifc32->ifc_len;
2950 thunk.ifc.ifc_buf = PTRIN(ifc32->ifc_buf);
2951 data = (caddr_t)&thunk.ifc;
2952 cmd = SIOCGIFCONF;
2953 break;
2954 case SIOCGDRVSPEC32:
2955 case SIOCSDRVSPEC32:
2956 ifd32 = (struct ifdrv32 *)data;
2957 memcpy(thunk.ifd.ifd_name, ifd32->ifd_name,
2958 sizeof(thunk.ifd.ifd_name));
2959 thunk.ifd.ifd_cmd = ifd32->ifd_cmd;
2960 thunk.ifd.ifd_len = ifd32->ifd_len;
2961 thunk.ifd.ifd_data = PTRIN(ifd32->ifd_data);
2962 data = (caddr_t)&thunk.ifd;
2963 cmd = _IOC_NEWTYPE(cmd, struct ifdrv);
2964 break;
2965 case SIOCAIFGROUP32:
2966 case SIOCGIFGROUP32:
2967 case SIOCDIFGROUP32:
2968 case SIOCGIFGMEMB32:
2969 ifgr32 = (struct ifgroupreq32 *)data;
2970 memcpy(thunk.ifgr.ifgr_name, ifgr32->ifgr_name,
2971 sizeof(thunk.ifgr.ifgr_name));
2972 thunk.ifgr.ifgr_len = ifgr32->ifgr_len;
2973 switch (cmd) {
2974 case SIOCAIFGROUP32:
2975 case SIOCDIFGROUP32:
2976 memcpy(thunk.ifgr.ifgr_group, ifgr32->ifgr_group,
2977 sizeof(thunk.ifgr.ifgr_group));
2978 break;
2979 case SIOCGIFGROUP32:
2980 case SIOCGIFGMEMB32:
2981 thunk.ifgr.ifgr_groups = PTRIN(ifgr32->ifgr_groups);
2982 break;
2983 }
2984 data = (caddr_t)&thunk.ifgr;
2985 cmd = _IOC_NEWTYPE(cmd, struct ifgroupreq);
2986 break;
2987 case SIOCGIFMEDIA32:
2988 case SIOCGIFXMEDIA32:
2989 ifmr32 = (struct ifmediareq32 *)data;
2990 memcpy(thunk.ifmr.ifm_name, ifmr32->ifm_name,
2991 sizeof(thunk.ifmr.ifm_name));
2992 thunk.ifmr.ifm_current = ifmr32->ifm_current;
2993 thunk.ifmr.ifm_mask = ifmr32->ifm_mask;
2994 thunk.ifmr.ifm_status = ifmr32->ifm_status;
2995 thunk.ifmr.ifm_active = ifmr32->ifm_active;
2996 thunk.ifmr.ifm_count = ifmr32->ifm_count;
2997 thunk.ifmr.ifm_ulist = PTRIN(ifmr32->ifm_ulist);
2998 data = (caddr_t)&thunk.ifmr;
2999 cmd = _IOC_NEWTYPE(cmd, struct ifmediareq);
3000 break;
3001 }
3002 #endif
3003
3004 switch (cmd) {
3005 case SIOCGIFCONF:
3006 error = ifconf(cmd, data);
3007 goto out_noref;
3008 }
3009
3010 ifr = (struct ifreq *)data;
3011 switch (cmd) {
3012 #ifdef VIMAGE
3013 case SIOCSIFRVNET:
3014 error = priv_check(td, PRIV_NET_SETIFVNET);
3015 if (error == 0)
3016 error = if_vmove_reclaim(td, ifr->ifr_name,
3017 ifr->ifr_jid);
3018 goto out_noref;
3019 #endif
3020 case SIOCIFCREATE:
3021 case SIOCIFCREATE2:
3022 error = priv_check(td, PRIV_NET_IFCREATE);
3023 if (error == 0)
3024 error = if_clone_create(ifr->ifr_name,
3025 sizeof(ifr->ifr_name), cmd == SIOCIFCREATE2 ?
3026 ifr_data_get_ptr(ifr) : NULL);
3027 goto out_noref;
3028 case SIOCIFDESTROY:
3029 error = priv_check(td, PRIV_NET_IFDESTROY);
3030
3031 if (error == 0) {
3032 sx_xlock(&ifnet_detach_sxlock);
3033 error = if_clone_destroy(ifr->ifr_name);
3034 sx_xunlock(&ifnet_detach_sxlock);
3035 }
3036 goto out_noref;
3037
3038 case SIOCIFGCLONERS:
3039 error = if_clone_list((struct if_clonereq *)data);
3040 goto out_noref;
3041
3042 case SIOCGIFGMEMB:
3043 error = if_getgroupmembers((struct ifgroupreq *)data);
3044 goto out_noref;
3045
3046 #if defined(INET) || defined(INET6)
3047 case SIOCSVH:
3048 case SIOCGVH:
3049 if (carp_ioctl_p == NULL)
3050 error = EPROTONOSUPPORT;
3051 else
3052 error = (*carp_ioctl_p)(ifr, cmd, td);
3053 goto out_noref;
3054 #endif
3055 }
3056
3057 ifp = ifunit_ref(ifr->ifr_name);
3058 if (ifp == NULL) {
3059 error = ENXIO;
3060 goto out_noref;
3061 }
3062
3063 error = ifhwioctl(cmd, ifp, data, td);
3064 if (error != ENOIOCTL)
3065 goto out_ref;
3066
3067 oif_flags = ifp->if_flags;
3068 if (so->so_proto == NULL) {
3069 error = EOPNOTSUPP;
3070 goto out_ref;
3071 }
3072
3073 /*
3074 * Pass the request on to the socket control method, and if the
3075 * latter returns EOPNOTSUPP, directly to the interface.
3076 *
3077 * Make an exception for the legacy SIOCSIF* requests. Drivers
3078 * trust SIOCSIFADDR et al to come from an already privileged
3079 * layer, and do not perform any credentials checks or input
3080 * validation.
3081 */
3082 error = so->so_proto->pr_control(so, cmd, data, ifp, td);
3083 if (error == EOPNOTSUPP && ifp != NULL && ifp->if_ioctl != NULL &&
3084 cmd != SIOCSIFADDR && cmd != SIOCSIFBRDADDR &&
3085 cmd != SIOCSIFDSTADDR && cmd != SIOCSIFNETMASK)
3086 error = (*ifp->if_ioctl)(ifp, cmd, data);
3087
3088 if (!(oif_flags & IFF_UP) && (ifp->if_flags & IFF_UP))
3089 if_up(ifp);
3090 out_ref:
3091 if_rele(ifp);
3092 out_noref:
3093 CURVNET_RESTORE();
3094 #ifdef COMPAT_FREEBSD32
3095 if (error != 0)
3096 return (error);
3097 switch (saved_cmd) {
3098 case SIOCGIFCONF32:
3099 ifc32->ifc_len = thunk.ifc.ifc_len;
3100 break;
3101 case SIOCGDRVSPEC32:
3102 /*
3103 * SIOCGDRVSPEC is IOWR, but nothing actually touches
3104 * the struct so just assert that ifd_len (the only
3105 * field it might make sense to update) hasn't
3106 * changed.
3107 */
3108 KASSERT(thunk.ifd.ifd_len == ifd32->ifd_len,
3109 ("ifd_len was updated %u -> %zu", ifd32->ifd_len,
3110 thunk.ifd.ifd_len));
3111 break;
3112 case SIOCGIFGROUP32:
3113 case SIOCGIFGMEMB32:
3114 ifgr32->ifgr_len = thunk.ifgr.ifgr_len;
3115 break;
3116 case SIOCGIFMEDIA32:
3117 case SIOCGIFXMEDIA32:
3118 ifmr32->ifm_current = thunk.ifmr.ifm_current;
3119 ifmr32->ifm_mask = thunk.ifmr.ifm_mask;
3120 ifmr32->ifm_status = thunk.ifmr.ifm_status;
3121 ifmr32->ifm_active = thunk.ifmr.ifm_active;
3122 ifmr32->ifm_count = thunk.ifmr.ifm_count;
3123 break;
3124 }
3125 #endif
3126 return (error);
3127 }
3128
3129 int
if_rename(struct ifnet * ifp,char * new_name)3130 if_rename(struct ifnet *ifp, char *new_name)
3131 {
3132 struct ifaddr *ifa;
3133 struct sockaddr_dl *sdl;
3134 size_t namelen, onamelen;
3135 char old_name[IFNAMSIZ];
3136 char strbuf[IFNAMSIZ + 8];
3137
3138 if (new_name[0] == '\0')
3139 return (EINVAL);
3140 if (strcmp(new_name, ifp->if_xname) == 0)
3141 return (0);
3142 if (ifunit(new_name) != NULL)
3143 return (EEXIST);
3144
3145 /*
3146 * XXX: Locking. Nothing else seems to lock if_flags,
3147 * and there are numerous other races with the
3148 * ifunit() checks not being atomic with namespace
3149 * changes (renames, vmoves, if_attach, etc).
3150 */
3151 ifp->if_flags |= IFF_RENAMING;
3152
3153 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
3154
3155 if_printf(ifp, "changing name to '%s'\n", new_name);
3156
3157 IF_ADDR_WLOCK(ifp);
3158 strlcpy(old_name, ifp->if_xname, sizeof(old_name));
3159 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname));
3160 ifa = ifp->if_addr;
3161 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
3162 namelen = strlen(new_name);
3163 onamelen = sdl->sdl_nlen;
3164 /*
3165 * Move the address if needed. This is safe because we
3166 * allocate space for a name of length IFNAMSIZ when we
3167 * create this in if_attach().
3168 */
3169 if (namelen != onamelen) {
3170 bcopy(sdl->sdl_data + onamelen,
3171 sdl->sdl_data + namelen, sdl->sdl_alen);
3172 }
3173 bcopy(new_name, sdl->sdl_data, namelen);
3174 sdl->sdl_nlen = namelen;
3175 sdl = (struct sockaddr_dl *)ifa->ifa_netmask;
3176 bzero(sdl->sdl_data, onamelen);
3177 while (namelen != 0)
3178 sdl->sdl_data[--namelen] = 0xff;
3179 IF_ADDR_WUNLOCK(ifp);
3180
3181 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
3182
3183 ifp->if_flags &= ~IFF_RENAMING;
3184
3185 snprintf(strbuf, sizeof(strbuf), "name=%s", new_name);
3186 devctl_notify("IFNET", old_name, "RENAME", strbuf);
3187
3188 return (0);
3189 }
3190
3191 /*
3192 * The code common to handling reference counted flags,
3193 * e.g., in ifpromisc() and if_allmulti().
3194 * The "pflag" argument can specify a permanent mode flag to check,
3195 * such as IFF_PPROMISC for promiscuous mode; should be 0 if none.
3196 *
3197 * Only to be used on stack-owned flags, not driver-owned flags.
3198 */
3199 static int
if_setflag(struct ifnet * ifp,int flag,int pflag,int * refcount,int onswitch)3200 if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch)
3201 {
3202 struct ifreq ifr;
3203 int error;
3204 int oldflags, oldcount;
3205
3206 /* Sanity checks to catch programming errors */
3207 KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0,
3208 ("%s: setting driver-owned flag %d", __func__, flag));
3209
3210 if (onswitch)
3211 KASSERT(*refcount >= 0,
3212 ("%s: increment negative refcount %d for flag %d",
3213 __func__, *refcount, flag));
3214 else
3215 KASSERT(*refcount > 0,
3216 ("%s: decrement non-positive refcount %d for flag %d",
3217 __func__, *refcount, flag));
3218
3219 /* In case this mode is permanent, just touch refcount */
3220 if (ifp->if_flags & pflag) {
3221 *refcount += onswitch ? 1 : -1;
3222 return (0);
3223 }
3224
3225 /* Save ifnet parameters for if_ioctl() may fail */
3226 oldcount = *refcount;
3227 oldflags = ifp->if_flags;
3228
3229 /*
3230 * See if we aren't the only and touching refcount is enough.
3231 * Actually toggle interface flag if we are the first or last.
3232 */
3233 if (onswitch) {
3234 if ((*refcount)++)
3235 return (0);
3236 ifp->if_flags |= flag;
3237 } else {
3238 if (--(*refcount))
3239 return (0);
3240 ifp->if_flags &= ~flag;
3241 }
3242
3243 /* Call down the driver since we've changed interface flags */
3244 if (ifp->if_ioctl == NULL) {
3245 error = EOPNOTSUPP;
3246 goto recover;
3247 }
3248 ifr.ifr_flags = ifp->if_flags & 0xffff;
3249 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3250 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3251 if (error)
3252 goto recover;
3253 /* Notify userland that interface flags have changed */
3254 rt_ifmsg(ifp, flag);
3255 return (0);
3256
3257 recover:
3258 /* Recover after driver error */
3259 *refcount = oldcount;
3260 ifp->if_flags = oldflags;
3261 return (error);
3262 }
3263
3264 /*
3265 * Set/clear promiscuous mode on interface ifp based on the truth value
3266 * of pswitch. The calls are reference counted so that only the first
3267 * "on" request actually has an effect, as does the final "off" request.
3268 * Results are undefined if the "off" and "on" requests are not matched.
3269 */
3270 int
ifpromisc(struct ifnet * ifp,int pswitch)3271 ifpromisc(struct ifnet *ifp, int pswitch)
3272 {
3273 int error;
3274 int oldflags = ifp->if_flags;
3275
3276 error = if_setflag(ifp, IFF_PROMISC, IFF_PPROMISC,
3277 &ifp->if_pcount, pswitch);
3278 /* If promiscuous mode status has changed, log a message */
3279 if (error == 0 && ((ifp->if_flags ^ oldflags) & IFF_PROMISC) &&
3280 log_promisc_mode_change)
3281 if_printf(ifp, "promiscuous mode %s\n",
3282 (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled");
3283 return (error);
3284 }
3285
3286 /*
3287 * Return interface configuration
3288 * of system. List may be used
3289 * in later ioctl's (above) to get
3290 * other information.
3291 */
3292 /*ARGSUSED*/
3293 static int
ifconf(u_long cmd,caddr_t data)3294 ifconf(u_long cmd, caddr_t data)
3295 {
3296 struct ifconf *ifc = (struct ifconf *)data;
3297 struct ifnet *ifp;
3298 struct ifaddr *ifa;
3299 struct ifreq ifr;
3300 struct sbuf *sb;
3301 int error, full = 0, valid_len, max_len;
3302
3303 /* Limit initial buffer size to maxphys to avoid DoS from userspace. */
3304 max_len = maxphys - 1;
3305
3306 /* Prevent hostile input from being able to crash the system */
3307 if (ifc->ifc_len <= 0)
3308 return (EINVAL);
3309
3310 again:
3311 if (ifc->ifc_len <= max_len) {
3312 max_len = ifc->ifc_len;
3313 full = 1;
3314 }
3315 sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN);
3316 max_len = 0;
3317 valid_len = 0;
3318
3319 IFNET_RLOCK();
3320 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
3321 struct epoch_tracker et;
3322 int addrs;
3323
3324 /*
3325 * Zero the ifr to make sure we don't disclose the contents
3326 * of the stack.
3327 */
3328 memset(&ifr, 0, sizeof(ifr));
3329
3330 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name))
3331 >= sizeof(ifr.ifr_name)) {
3332 sbuf_delete(sb);
3333 IFNET_RUNLOCK();
3334 return (ENAMETOOLONG);
3335 }
3336
3337 addrs = 0;
3338 NET_EPOCH_ENTER(et);
3339 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
3340 struct sockaddr *sa = ifa->ifa_addr;
3341
3342 if (prison_if(curthread->td_ucred, sa) != 0)
3343 continue;
3344 addrs++;
3345 if (sa->sa_len <= sizeof(*sa)) {
3346 if (sa->sa_len < sizeof(*sa)) {
3347 memset(&ifr.ifr_ifru.ifru_addr, 0,
3348 sizeof(ifr.ifr_ifru.ifru_addr));
3349 memcpy(&ifr.ifr_ifru.ifru_addr, sa,
3350 sa->sa_len);
3351 } else
3352 ifr.ifr_ifru.ifru_addr = *sa;
3353 sbuf_bcat(sb, &ifr, sizeof(ifr));
3354 max_len += sizeof(ifr);
3355 } else {
3356 sbuf_bcat(sb, &ifr,
3357 offsetof(struct ifreq, ifr_addr));
3358 max_len += offsetof(struct ifreq, ifr_addr);
3359 sbuf_bcat(sb, sa, sa->sa_len);
3360 max_len += sa->sa_len;
3361 }
3362
3363 if (sbuf_error(sb) == 0)
3364 valid_len = sbuf_len(sb);
3365 }
3366 NET_EPOCH_EXIT(et);
3367 if (addrs == 0) {
3368 sbuf_bcat(sb, &ifr, sizeof(ifr));
3369 max_len += sizeof(ifr);
3370
3371 if (sbuf_error(sb) == 0)
3372 valid_len = sbuf_len(sb);
3373 }
3374 }
3375 IFNET_RUNLOCK();
3376
3377 /*
3378 * If we didn't allocate enough space (uncommon), try again. If
3379 * we have already allocated as much space as we are allowed,
3380 * return what we've got.
3381 */
3382 if (valid_len != max_len && !full) {
3383 sbuf_delete(sb);
3384 goto again;
3385 }
3386
3387 ifc->ifc_len = valid_len;
3388 sbuf_finish(sb);
3389 error = copyout(sbuf_data(sb), ifc->ifc_req, ifc->ifc_len);
3390 sbuf_delete(sb);
3391 return (error);
3392 }
3393
3394 /*
3395 * Just like ifpromisc(), but for all-multicast-reception mode.
3396 */
3397 int
if_allmulti(struct ifnet * ifp,int onswitch)3398 if_allmulti(struct ifnet *ifp, int onswitch)
3399 {
3400
3401 return (if_setflag(ifp, IFF_ALLMULTI, IFF_PALLMULTI, &ifp->if_amcount,
3402 onswitch));
3403 }
3404
3405 struct ifmultiaddr *
if_findmulti(struct ifnet * ifp,const struct sockaddr * sa)3406 if_findmulti(struct ifnet *ifp, const struct sockaddr *sa)
3407 {
3408 struct ifmultiaddr *ifma;
3409
3410 IF_ADDR_LOCK_ASSERT(ifp);
3411
3412 CK_STAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
3413 if (sa->sa_family == AF_LINK) {
3414 if (sa_dl_equal(ifma->ifma_addr, sa))
3415 break;
3416 } else {
3417 if (sa_equal(ifma->ifma_addr, sa))
3418 break;
3419 }
3420 }
3421
3422 return ifma;
3423 }
3424
3425 /*
3426 * Allocate a new ifmultiaddr and initialize based on passed arguments. We
3427 * make copies of passed sockaddrs. The ifmultiaddr will not be added to
3428 * the ifnet multicast address list here, so the caller must do that and
3429 * other setup work (such as notifying the device driver). The reference
3430 * count is initialized to 1.
3431 */
3432 static struct ifmultiaddr *
if_allocmulti(struct ifnet * ifp,struct sockaddr * sa,struct sockaddr * llsa,int mflags)3433 if_allocmulti(struct ifnet *ifp, struct sockaddr *sa, struct sockaddr *llsa,
3434 int mflags)
3435 {
3436 struct ifmultiaddr *ifma;
3437 struct sockaddr *dupsa;
3438
3439 ifma = malloc(sizeof *ifma, M_IFMADDR, mflags |
3440 M_ZERO);
3441 if (ifma == NULL)
3442 return (NULL);
3443
3444 dupsa = malloc(sa->sa_len, M_IFMADDR, mflags);
3445 if (dupsa == NULL) {
3446 free(ifma, M_IFMADDR);
3447 return (NULL);
3448 }
3449 bcopy(sa, dupsa, sa->sa_len);
3450 ifma->ifma_addr = dupsa;
3451
3452 ifma->ifma_ifp = ifp;
3453 ifma->ifma_refcount = 1;
3454 ifma->ifma_protospec = NULL;
3455
3456 if (llsa == NULL) {
3457 ifma->ifma_lladdr = NULL;
3458 return (ifma);
3459 }
3460
3461 dupsa = malloc(llsa->sa_len, M_IFMADDR, mflags);
3462 if (dupsa == NULL) {
3463 free(ifma->ifma_addr, M_IFMADDR);
3464 free(ifma, M_IFMADDR);
3465 return (NULL);
3466 }
3467 bcopy(llsa, dupsa, llsa->sa_len);
3468 ifma->ifma_lladdr = dupsa;
3469
3470 return (ifma);
3471 }
3472
3473 /*
3474 * if_freemulti: free ifmultiaddr structure and possibly attached related
3475 * addresses. The caller is responsible for implementing reference
3476 * counting, notifying the driver, handling routing messages, and releasing
3477 * any dependent link layer state.
3478 */
3479 #ifdef MCAST_VERBOSE
3480 extern void kdb_backtrace(void);
3481 #endif
3482 static void
if_freemulti_internal(struct ifmultiaddr * ifma)3483 if_freemulti_internal(struct ifmultiaddr *ifma)
3484 {
3485
3486 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti: refcount %d",
3487 ifma->ifma_refcount));
3488
3489 if (ifma->ifma_lladdr != NULL)
3490 free(ifma->ifma_lladdr, M_IFMADDR);
3491 #ifdef MCAST_VERBOSE
3492 kdb_backtrace();
3493 printf("%s freeing ifma: %p\n", __func__, ifma);
3494 #endif
3495 free(ifma->ifma_addr, M_IFMADDR);
3496 free(ifma, M_IFMADDR);
3497 }
3498
3499 static void
if_destroymulti(epoch_context_t ctx)3500 if_destroymulti(epoch_context_t ctx)
3501 {
3502 struct ifmultiaddr *ifma;
3503
3504 ifma = __containerof(ctx, struct ifmultiaddr, ifma_epoch_ctx);
3505 if_freemulti_internal(ifma);
3506 }
3507
3508 void
if_freemulti(struct ifmultiaddr * ifma)3509 if_freemulti(struct ifmultiaddr *ifma)
3510 {
3511 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti_epoch: refcount %d",
3512 ifma->ifma_refcount));
3513
3514 NET_EPOCH_CALL(if_destroymulti, &ifma->ifma_epoch_ctx);
3515 }
3516
3517 /*
3518 * Register an additional multicast address with a network interface.
3519 *
3520 * - If the address is already present, bump the reference count on the
3521 * address and return.
3522 * - If the address is not link-layer, look up a link layer address.
3523 * - Allocate address structures for one or both addresses, and attach to the
3524 * multicast address list on the interface. If automatically adding a link
3525 * layer address, the protocol address will own a reference to the link
3526 * layer address, to be freed when it is freed.
3527 * - Notify the network device driver of an addition to the multicast address
3528 * list.
3529 *
3530 * 'sa' points to caller-owned memory with the desired multicast address.
3531 *
3532 * 'retifma' will be used to return a pointer to the resulting multicast
3533 * address reference, if desired.
3534 */
3535 int
if_addmulti(struct ifnet * ifp,struct sockaddr * sa,struct ifmultiaddr ** retifma)3536 if_addmulti(struct ifnet *ifp, struct sockaddr *sa,
3537 struct ifmultiaddr **retifma)
3538 {
3539 struct ifmultiaddr *ifma, *ll_ifma;
3540 struct sockaddr *llsa;
3541 struct sockaddr_dl sdl;
3542 int error;
3543
3544 #ifdef INET
3545 IN_MULTI_LIST_UNLOCK_ASSERT();
3546 #endif
3547 #ifdef INET6
3548 IN6_MULTI_LIST_UNLOCK_ASSERT();
3549 #endif
3550 /*
3551 * If the address is already present, return a new reference to it;
3552 * otherwise, allocate storage and set up a new address.
3553 */
3554 IF_ADDR_WLOCK(ifp);
3555 ifma = if_findmulti(ifp, sa);
3556 if (ifma != NULL) {
3557 ifma->ifma_refcount++;
3558 if (retifma != NULL)
3559 *retifma = ifma;
3560 IF_ADDR_WUNLOCK(ifp);
3561 return (0);
3562 }
3563
3564 /*
3565 * The address isn't already present; resolve the protocol address
3566 * into a link layer address, and then look that up, bump its
3567 * refcount or allocate an ifma for that also.
3568 * Most link layer resolving functions returns address data which
3569 * fits inside default sockaddr_dl structure. However callback
3570 * can allocate another sockaddr structure, in that case we need to
3571 * free it later.
3572 */
3573 llsa = NULL;
3574 ll_ifma = NULL;
3575 if (ifp->if_resolvemulti != NULL) {
3576 /* Provide called function with buffer size information */
3577 sdl.sdl_len = sizeof(sdl);
3578 llsa = (struct sockaddr *)&sdl;
3579 error = ifp->if_resolvemulti(ifp, &llsa, sa);
3580 if (error)
3581 goto unlock_out;
3582 }
3583
3584 /*
3585 * Allocate the new address. Don't hook it up yet, as we may also
3586 * need to allocate a link layer multicast address.
3587 */
3588 ifma = if_allocmulti(ifp, sa, llsa, M_NOWAIT);
3589 if (ifma == NULL) {
3590 error = ENOMEM;
3591 goto free_llsa_out;
3592 }
3593
3594 /*
3595 * If a link layer address is found, we'll need to see if it's
3596 * already present in the address list, or allocate is as well.
3597 * When this block finishes, the link layer address will be on the
3598 * list.
3599 */
3600 if (llsa != NULL) {
3601 ll_ifma = if_findmulti(ifp, llsa);
3602 if (ll_ifma == NULL) {
3603 ll_ifma = if_allocmulti(ifp, llsa, NULL, M_NOWAIT);
3604 if (ll_ifma == NULL) {
3605 --ifma->ifma_refcount;
3606 if_freemulti(ifma);
3607 error = ENOMEM;
3608 goto free_llsa_out;
3609 }
3610 ll_ifma->ifma_flags |= IFMA_F_ENQUEUED;
3611 CK_STAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ll_ifma,
3612 ifma_link);
3613 } else
3614 ll_ifma->ifma_refcount++;
3615 ifma->ifma_llifma = ll_ifma;
3616 }
3617
3618 /*
3619 * We now have a new multicast address, ifma, and possibly a new or
3620 * referenced link layer address. Add the primary address to the
3621 * ifnet address list.
3622 */
3623 ifma->ifma_flags |= IFMA_F_ENQUEUED;
3624 CK_STAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
3625
3626 if (retifma != NULL)
3627 *retifma = ifma;
3628
3629 /*
3630 * Must generate the message while holding the lock so that 'ifma'
3631 * pointer is still valid.
3632 */
3633 rt_newmaddrmsg(RTM_NEWMADDR, ifma);
3634 IF_ADDR_WUNLOCK(ifp);
3635
3636 /*
3637 * We are certain we have added something, so call down to the
3638 * interface to let them know about it.
3639 */
3640 if (ifp->if_ioctl != NULL) {
3641 if (THREAD_CAN_SLEEP())
3642 (void )(*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0);
3643 else
3644 taskqueue_enqueue(taskqueue_swi, &ifp->if_addmultitask);
3645 }
3646
3647 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl))
3648 link_free_sdl(llsa);
3649
3650 return (0);
3651
3652 free_llsa_out:
3653 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl))
3654 link_free_sdl(llsa);
3655
3656 unlock_out:
3657 IF_ADDR_WUNLOCK(ifp);
3658 return (error);
3659 }
3660
3661 static void
if_siocaddmulti(void * arg,int pending)3662 if_siocaddmulti(void *arg, int pending)
3663 {
3664 struct ifnet *ifp;
3665
3666 ifp = arg;
3667 #ifdef DIAGNOSTIC
3668 if (pending > 1)
3669 if_printf(ifp, "%d SIOCADDMULTI coalesced\n", pending);
3670 #endif
3671 CURVNET_SET(ifp->if_vnet);
3672 (void )(*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0);
3673 CURVNET_RESTORE();
3674 }
3675
3676 /*
3677 * Delete a multicast group membership by network-layer group address.
3678 *
3679 * Returns ENOENT if the entry could not be found. If ifp no longer
3680 * exists, results are undefined. This entry point should only be used
3681 * from subsystems which do appropriate locking to hold ifp for the
3682 * duration of the call.
3683 * Network-layer protocol domains must use if_delmulti_ifma().
3684 */
3685 int
if_delmulti(struct ifnet * ifp,struct sockaddr * sa)3686 if_delmulti(struct ifnet *ifp, struct sockaddr *sa)
3687 {
3688 struct ifmultiaddr *ifma;
3689 int lastref;
3690
3691 KASSERT(ifp, ("%s: NULL ifp", __func__));
3692
3693 IF_ADDR_WLOCK(ifp);
3694 lastref = 0;
3695 ifma = if_findmulti(ifp, sa);
3696 if (ifma != NULL)
3697 lastref = if_delmulti_locked(ifp, ifma, 0);
3698 IF_ADDR_WUNLOCK(ifp);
3699
3700 if (ifma == NULL)
3701 return (ENOENT);
3702
3703 if (lastref && ifp->if_ioctl != NULL) {
3704 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
3705 }
3706
3707 return (0);
3708 }
3709
3710 /*
3711 * Delete all multicast group membership for an interface.
3712 * Should be used to quickly flush all multicast filters.
3713 */
3714 void
if_delallmulti(struct ifnet * ifp)3715 if_delallmulti(struct ifnet *ifp)
3716 {
3717 struct ifmultiaddr *ifma;
3718 struct ifmultiaddr *next;
3719
3720 IF_ADDR_WLOCK(ifp);
3721 CK_STAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next)
3722 if_delmulti_locked(ifp, ifma, 0);
3723 IF_ADDR_WUNLOCK(ifp);
3724 }
3725
3726 void
if_delmulti_ifma(struct ifmultiaddr * ifma)3727 if_delmulti_ifma(struct ifmultiaddr *ifma)
3728 {
3729 if_delmulti_ifma_flags(ifma, 0);
3730 }
3731
3732 /*
3733 * Delete a multicast group membership by group membership pointer.
3734 * Network-layer protocol domains must use this routine.
3735 *
3736 * It is safe to call this routine if the ifp disappeared.
3737 */
3738 void
if_delmulti_ifma_flags(struct ifmultiaddr * ifma,int flags)3739 if_delmulti_ifma_flags(struct ifmultiaddr *ifma, int flags)
3740 {
3741 struct ifnet *ifp;
3742 int lastref;
3743 MCDPRINTF("%s freeing ifma: %p\n", __func__, ifma);
3744 #ifdef INET
3745 IN_MULTI_LIST_UNLOCK_ASSERT();
3746 #endif
3747 ifp = ifma->ifma_ifp;
3748 #ifdef DIAGNOSTIC
3749 if (ifp == NULL) {
3750 printf("%s: ifma_ifp seems to be detached\n", __func__);
3751 } else {
3752 struct epoch_tracker et;
3753 struct ifnet *oifp;
3754
3755 NET_EPOCH_ENTER(et);
3756 CK_STAILQ_FOREACH(oifp, &V_ifnet, if_link)
3757 if (ifp == oifp)
3758 break;
3759 NET_EPOCH_EXIT(et);
3760 if (ifp != oifp)
3761 ifp = NULL;
3762 }
3763 #endif
3764 /*
3765 * If and only if the ifnet instance exists: Acquire the address lock.
3766 */
3767 if (ifp != NULL)
3768 IF_ADDR_WLOCK(ifp);
3769
3770 lastref = if_delmulti_locked(ifp, ifma, flags);
3771
3772 if (ifp != NULL) {
3773 /*
3774 * If and only if the ifnet instance exists:
3775 * Release the address lock.
3776 * If the group was left: update the hardware hash filter.
3777 */
3778 IF_ADDR_WUNLOCK(ifp);
3779 if (lastref && ifp->if_ioctl != NULL) {
3780 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
3781 }
3782 }
3783 }
3784
3785 /*
3786 * Perform deletion of network-layer and/or link-layer multicast address.
3787 *
3788 * Return 0 if the reference count was decremented.
3789 * Return 1 if the final reference was released, indicating that the
3790 * hardware hash filter should be reprogrammed.
3791 */
3792 static int
if_delmulti_locked(struct ifnet * ifp,struct ifmultiaddr * ifma,int detaching)3793 if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching)
3794 {
3795 struct ifmultiaddr *ll_ifma;
3796
3797 if (ifp != NULL && ifma->ifma_ifp != NULL) {
3798 KASSERT(ifma->ifma_ifp == ifp,
3799 ("%s: inconsistent ifp %p", __func__, ifp));
3800 IF_ADDR_WLOCK_ASSERT(ifp);
3801 }
3802
3803 ifp = ifma->ifma_ifp;
3804 MCDPRINTF("%s freeing %p from %s \n", __func__, ifma, ifp ? ifp->if_xname : "");
3805
3806 /*
3807 * If the ifnet is detaching, null out references to ifnet,
3808 * so that upper protocol layers will notice, and not attempt
3809 * to obtain locks for an ifnet which no longer exists. The
3810 * routing socket announcement must happen before the ifnet
3811 * instance is detached from the system.
3812 */
3813 if (detaching) {
3814 #ifdef DIAGNOSTIC
3815 printf("%s: detaching ifnet instance %p\n", __func__, ifp);
3816 #endif
3817 /*
3818 * ifp may already be nulled out if we are being reentered
3819 * to delete the ll_ifma.
3820 */
3821 if (ifp != NULL) {
3822 rt_newmaddrmsg(RTM_DELMADDR, ifma);
3823 ifma->ifma_ifp = NULL;
3824 }
3825 }
3826
3827 if (--ifma->ifma_refcount > 0)
3828 return 0;
3829
3830 if (ifp != NULL && detaching == 0 && (ifma->ifma_flags & IFMA_F_ENQUEUED)) {
3831 CK_STAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifmultiaddr, ifma_link);
3832 ifma->ifma_flags &= ~IFMA_F_ENQUEUED;
3833 }
3834 /*
3835 * If this ifma is a network-layer ifma, a link-layer ifma may
3836 * have been associated with it. Release it first if so.
3837 */
3838 ll_ifma = ifma->ifma_llifma;
3839 if (ll_ifma != NULL) {
3840 KASSERT(ifma->ifma_lladdr != NULL,
3841 ("%s: llifma w/o lladdr", __func__));
3842 if (detaching)
3843 ll_ifma->ifma_ifp = NULL; /* XXX */
3844 if (--ll_ifma->ifma_refcount == 0) {
3845 if (ifp != NULL) {
3846 if (ll_ifma->ifma_flags & IFMA_F_ENQUEUED) {
3847 CK_STAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma, ifmultiaddr,
3848 ifma_link);
3849 ll_ifma->ifma_flags &= ~IFMA_F_ENQUEUED;
3850 }
3851 }
3852 if_freemulti(ll_ifma);
3853 }
3854 }
3855 #ifdef INVARIANTS
3856 if (ifp) {
3857 struct ifmultiaddr *ifmatmp;
3858
3859 CK_STAILQ_FOREACH(ifmatmp, &ifp->if_multiaddrs, ifma_link)
3860 MPASS(ifma != ifmatmp);
3861 }
3862 #endif
3863 if_freemulti(ifma);
3864 /*
3865 * The last reference to this instance of struct ifmultiaddr
3866 * was released; the hardware should be notified of this change.
3867 */
3868 return 1;
3869 }
3870
3871 /*
3872 * Set the link layer address on an interface.
3873 *
3874 * At this time we only support certain types of interfaces,
3875 * and we don't allow the length of the address to change.
3876 *
3877 * Set noinline to be dtrace-friendly
3878 */
3879 __noinline int
if_setlladdr(struct ifnet * ifp,const u_char * lladdr,int len)3880 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len)
3881 {
3882 struct sockaddr_dl *sdl;
3883 struct ifaddr *ifa;
3884 struct ifreq ifr;
3885
3886 ifa = ifp->if_addr;
3887 if (ifa == NULL)
3888 return (EINVAL);
3889
3890 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
3891 if (sdl == NULL)
3892 return (EINVAL);
3893
3894 if (len != sdl->sdl_alen) /* don't allow length to change */
3895 return (EINVAL);
3896
3897 switch (ifp->if_type) {
3898 case IFT_ETHER:
3899 case IFT_XETHER:
3900 case IFT_L2VLAN:
3901 case IFT_BRIDGE:
3902 case IFT_IEEE8023ADLAG:
3903 bcopy(lladdr, LLADDR(sdl), len);
3904 break;
3905 default:
3906 return (ENODEV);
3907 }
3908
3909 /*
3910 * If the interface is already up, we need
3911 * to re-init it in order to reprogram its
3912 * address filter.
3913 */
3914 if ((ifp->if_flags & IFF_UP) != 0) {
3915 if (ifp->if_ioctl) {
3916 ifp->if_flags &= ~IFF_UP;
3917 ifr.ifr_flags = ifp->if_flags & 0xffff;
3918 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3919 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3920 ifp->if_flags |= IFF_UP;
3921 ifr.ifr_flags = ifp->if_flags & 0xffff;
3922 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3923 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3924 }
3925 }
3926 EVENTHANDLER_INVOKE(iflladdr_event, ifp);
3927
3928 return (0);
3929 }
3930
3931 /*
3932 * Compat function for handling basic encapsulation requests.
3933 * Not converted stacks (FDDI, IB, ..) supports traditional
3934 * output model: ARP (and other similar L2 protocols) are handled
3935 * inside output routine, arpresolve/nd6_resolve() returns MAC
3936 * address instead of full prepend.
3937 *
3938 * This function creates calculated header==MAC for IPv4/IPv6 and
3939 * returns EAFNOSUPPORT (which is then handled in ARP code) for other
3940 * address families.
3941 */
3942 static int
if_requestencap_default(struct ifnet * ifp,struct if_encap_req * req)3943 if_requestencap_default(struct ifnet *ifp, struct if_encap_req *req)
3944 {
3945 if (req->rtype != IFENCAP_LL)
3946 return (EOPNOTSUPP);
3947
3948 if (req->bufsize < req->lladdr_len)
3949 return (ENOMEM);
3950
3951 switch (req->family) {
3952 case AF_INET:
3953 case AF_INET6:
3954 break;
3955 default:
3956 return (EAFNOSUPPORT);
3957 }
3958
3959 /* Copy lladdr to storage as is */
3960 memmove(req->buf, req->lladdr, req->lladdr_len);
3961 req->bufsize = req->lladdr_len;
3962 req->lladdr_off = 0;
3963
3964 return (0);
3965 }
3966
3967 /*
3968 * Tunnel interfaces can nest, also they may cause infinite recursion
3969 * calls when misconfigured. We'll prevent this by detecting loops.
3970 * High nesting level may cause stack exhaustion. We'll prevent this
3971 * by introducing upper limit.
3972 *
3973 * Return 0, if tunnel nesting count is equal or less than limit.
3974 */
3975 int
if_tunnel_check_nesting(struct ifnet * ifp,struct mbuf * m,uint32_t cookie,int limit)3976 if_tunnel_check_nesting(struct ifnet *ifp, struct mbuf *m, uint32_t cookie,
3977 int limit)
3978 {
3979 struct m_tag *mtag;
3980 int count;
3981
3982 count = 1;
3983 mtag = NULL;
3984 while ((mtag = m_tag_locate(m, cookie, 0, mtag)) != NULL) {
3985 if (*(struct ifnet **)(mtag + 1) == ifp) {
3986 log(LOG_NOTICE, "%s: loop detected\n", if_name(ifp));
3987 return (EIO);
3988 }
3989 count++;
3990 }
3991 if (count > limit) {
3992 log(LOG_NOTICE,
3993 "%s: if_output recursively called too many times(%d)\n",
3994 if_name(ifp), count);
3995 return (EIO);
3996 }
3997 mtag = m_tag_alloc(cookie, 0, sizeof(struct ifnet *), M_NOWAIT);
3998 if (mtag == NULL)
3999 return (ENOMEM);
4000 *(struct ifnet **)(mtag + 1) = ifp;
4001 m_tag_prepend(m, mtag);
4002 return (0);
4003 }
4004
4005 /*
4006 * Get the link layer address that was read from the hardware at attach.
4007 *
4008 * This is only set by Ethernet NICs (IFT_ETHER), but laggX interfaces re-type
4009 * their component interfaces as IFT_IEEE8023ADLAG.
4010 */
4011 int
if_gethwaddr(struct ifnet * ifp,struct ifreq * ifr)4012 if_gethwaddr(struct ifnet *ifp, struct ifreq *ifr)
4013 {
4014 if (ifp->if_hw_addr == NULL)
4015 return (ENODEV);
4016
4017 switch (ifp->if_type) {
4018 case IFT_ETHER:
4019 case IFT_IEEE8023ADLAG:
4020 bcopy(ifp->if_hw_addr, ifr->ifr_addr.sa_data, ifp->if_addrlen);
4021 return (0);
4022 default:
4023 return (ENODEV);
4024 }
4025 }
4026
4027 /*
4028 * The name argument must be a pointer to storage which will last as
4029 * long as the interface does. For physical devices, the result of
4030 * device_get_name(dev) is a good choice and for pseudo-devices a
4031 * static string works well.
4032 */
4033 void
if_initname(struct ifnet * ifp,const char * name,int unit)4034 if_initname(struct ifnet *ifp, const char *name, int unit)
4035 {
4036 ifp->if_dname = name;
4037 ifp->if_dunit = unit;
4038 if (unit != IF_DUNIT_NONE)
4039 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit);
4040 else
4041 strlcpy(ifp->if_xname, name, IFNAMSIZ);
4042 }
4043
4044 static int
if_vlog(struct ifnet * ifp,int pri,const char * fmt,va_list ap)4045 if_vlog(struct ifnet *ifp, int pri, const char *fmt, va_list ap)
4046 {
4047 char if_fmt[256];
4048
4049 snprintf(if_fmt, sizeof(if_fmt), "%s: %s", ifp->if_xname, fmt);
4050 vlog(pri, if_fmt, ap);
4051 return (0);
4052 }
4053
4054
4055 int
if_printf(struct ifnet * ifp,const char * fmt,...)4056 if_printf(struct ifnet *ifp, const char *fmt, ...)
4057 {
4058 va_list ap;
4059
4060 va_start(ap, fmt);
4061 if_vlog(ifp, LOG_INFO, fmt, ap);
4062 va_end(ap);
4063 return (0);
4064 }
4065
4066 int
if_log(struct ifnet * ifp,int pri,const char * fmt,...)4067 if_log(struct ifnet *ifp, int pri, const char *fmt, ...)
4068 {
4069 va_list ap;
4070
4071 va_start(ap, fmt);
4072 if_vlog(ifp, pri, fmt, ap);
4073 va_end(ap);
4074 return (0);
4075 }
4076
4077 void
if_start(struct ifnet * ifp)4078 if_start(struct ifnet *ifp)
4079 {
4080
4081 (*(ifp)->if_start)(ifp);
4082 }
4083
4084 /*
4085 * Backwards compatibility interface for drivers
4086 * that have not implemented it
4087 */
4088 static int
if_transmit_default(struct ifnet * ifp,struct mbuf * m)4089 if_transmit_default(struct ifnet *ifp, struct mbuf *m)
4090 {
4091 int error;
4092
4093 IFQ_HANDOFF(ifp, m, error);
4094 return (error);
4095 }
4096
4097 static void
if_input_default(struct ifnet * ifp __unused,struct mbuf * m)4098 if_input_default(struct ifnet *ifp __unused, struct mbuf *m)
4099 {
4100 m_freem(m);
4101 }
4102
4103 int
if_handoff(struct ifqueue * ifq,struct mbuf * m,struct ifnet * ifp,int adjust)4104 if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust)
4105 {
4106 int active = 0;
4107
4108 IF_LOCK(ifq);
4109 if (_IF_QFULL(ifq)) {
4110 IF_UNLOCK(ifq);
4111 if_inc_counter(ifp, IFCOUNTER_OQDROPS, 1);
4112 m_freem(m);
4113 return (0);
4114 }
4115 if (ifp != NULL) {
4116 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len + adjust);
4117 if (m->m_flags & (M_BCAST|M_MCAST))
4118 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1);
4119 active = ifp->if_drv_flags & IFF_DRV_OACTIVE;
4120 }
4121 _IF_ENQUEUE(ifq, m);
4122 IF_UNLOCK(ifq);
4123 if (ifp != NULL && !active)
4124 (*(ifp)->if_start)(ifp);
4125 return (1);
4126 }
4127
4128 void
if_register_com_alloc(u_char type,if_com_alloc_t * a,if_com_free_t * f)4129 if_register_com_alloc(u_char type,
4130 if_com_alloc_t *a, if_com_free_t *f)
4131 {
4132
4133 KASSERT(if_com_alloc[type] == NULL,
4134 ("if_register_com_alloc: %d already registered", type));
4135 KASSERT(if_com_free[type] == NULL,
4136 ("if_register_com_alloc: %d free already registered", type));
4137
4138 if_com_alloc[type] = a;
4139 if_com_free[type] = f;
4140 }
4141
4142 void
if_deregister_com_alloc(u_char type)4143 if_deregister_com_alloc(u_char type)
4144 {
4145
4146 KASSERT(if_com_alloc[type] != NULL,
4147 ("if_deregister_com_alloc: %d not registered", type));
4148 KASSERT(if_com_free[type] != NULL,
4149 ("if_deregister_com_alloc: %d free not registered", type));
4150
4151 /*
4152 * Ensure all pending EPOCH(9) callbacks have been executed. This
4153 * fixes issues about late invocation of if_destroy(), which leads
4154 * to memory leak from if_com_alloc[type] allocated if_l2com.
4155 */
4156 NET_EPOCH_DRAIN_CALLBACKS();
4157
4158 if_com_alloc[type] = NULL;
4159 if_com_free[type] = NULL;
4160 }
4161
4162 /* API for driver access to network stack owned ifnet.*/
4163 uint64_t
if_setbaudrate(struct ifnet * ifp,uint64_t baudrate)4164 if_setbaudrate(struct ifnet *ifp, uint64_t baudrate)
4165 {
4166 uint64_t oldbrate;
4167
4168 oldbrate = ifp->if_baudrate;
4169 ifp->if_baudrate = baudrate;
4170 return (oldbrate);
4171 }
4172
4173 uint64_t
if_getbaudrate(const if_t ifp)4174 if_getbaudrate(const if_t ifp)
4175 {
4176 return (ifp->if_baudrate);
4177 }
4178
4179 int
if_setcapabilities(if_t ifp,int capabilities)4180 if_setcapabilities(if_t ifp, int capabilities)
4181 {
4182 ifp->if_capabilities = capabilities;
4183 return (0);
4184 }
4185
4186 int
if_setcapabilitiesbit(if_t ifp,int setbit,int clearbit)4187 if_setcapabilitiesbit(if_t ifp, int setbit, int clearbit)
4188 {
4189 ifp->if_capabilities &= ~clearbit;
4190 ifp->if_capabilities |= setbit;
4191 return (0);
4192 }
4193
4194 int
if_getcapabilities(const if_t ifp)4195 if_getcapabilities(const if_t ifp)
4196 {
4197 return (ifp->if_capabilities);
4198 }
4199
4200 int
if_setcapenable(if_t ifp,int capabilities)4201 if_setcapenable(if_t ifp, int capabilities)
4202 {
4203 ifp->if_capenable = capabilities;
4204 return (0);
4205 }
4206
4207 int
if_setcapenablebit(if_t ifp,int setcap,int clearcap)4208 if_setcapenablebit(if_t ifp, int setcap, int clearcap)
4209 {
4210 ifp->if_capenable &= ~clearcap;
4211 ifp->if_capenable |= setcap;
4212 return (0);
4213 }
4214
4215 int
if_setcapabilities2(if_t ifp,int capabilities)4216 if_setcapabilities2(if_t ifp, int capabilities)
4217 {
4218 ifp->if_capabilities2 = capabilities;
4219 return (0);
4220 }
4221
4222 int
if_setcapabilities2bit(if_t ifp,int setbit,int clearbit)4223 if_setcapabilities2bit(if_t ifp, int setbit, int clearbit)
4224 {
4225 ifp->if_capabilities2 &= ~clearbit;
4226 ifp->if_capabilities2 |= setbit;
4227 return (0);
4228 }
4229
4230 int
if_getcapabilities2(const if_t ifp)4231 if_getcapabilities2(const if_t ifp)
4232 {
4233 return (ifp->if_capabilities2);
4234 }
4235
4236 int
if_setcapenable2(if_t ifp,int capabilities2)4237 if_setcapenable2(if_t ifp, int capabilities2)
4238 {
4239 ifp->if_capenable2 = capabilities2;
4240 return (0);
4241 }
4242
4243 int
if_setcapenable2bit(if_t ifp,int setcap,int clearcap)4244 if_setcapenable2bit(if_t ifp, int setcap, int clearcap)
4245 {
4246 ifp->if_capenable2 &= ~clearcap;
4247 ifp->if_capenable2 |= setcap;
4248 return (0);
4249 }
4250
4251 const char *
if_getdname(const if_t ifp)4252 if_getdname(const if_t ifp)
4253 {
4254 return (ifp->if_dname);
4255 }
4256
4257 void
if_setdname(if_t ifp,const char * dname)4258 if_setdname(if_t ifp, const char *dname)
4259 {
4260 ifp->if_dname = dname;
4261 }
4262
4263 const char *
if_name(if_t ifp)4264 if_name(if_t ifp)
4265 {
4266 return (ifp->if_xname);
4267 }
4268
4269 int
if_setname(if_t ifp,const char * name)4270 if_setname(if_t ifp, const char *name)
4271 {
4272 if (strlen(name) > sizeof(ifp->if_xname) - 1)
4273 return (ENAMETOOLONG);
4274 strcpy(ifp->if_xname, name);
4275
4276 return (0);
4277 }
4278
4279 int
if_togglecapenable(if_t ifp,int togglecap)4280 if_togglecapenable(if_t ifp, int togglecap)
4281 {
4282 ifp->if_capenable ^= togglecap;
4283 return (0);
4284 }
4285
4286 int
if_getcapenable(const if_t ifp)4287 if_getcapenable(const if_t ifp)
4288 {
4289 return (ifp->if_capenable);
4290 }
4291
4292 int
if_togglecapenable2(if_t ifp,int togglecap)4293 if_togglecapenable2(if_t ifp, int togglecap)
4294 {
4295 ifp->if_capenable2 ^= togglecap;
4296 return (0);
4297 }
4298
4299 int
if_getcapenable2(const if_t ifp)4300 if_getcapenable2(const if_t ifp)
4301 {
4302 return (ifp->if_capenable2);
4303 }
4304
4305 int
if_getdunit(const if_t ifp)4306 if_getdunit(const if_t ifp)
4307 {
4308 return (ifp->if_dunit);
4309 }
4310
4311 int
if_getindex(const if_t ifp)4312 if_getindex(const if_t ifp)
4313 {
4314 return (ifp->if_index);
4315 }
4316
4317 int
if_getidxgen(const if_t ifp)4318 if_getidxgen(const if_t ifp)
4319 {
4320 return (ifp->if_idxgen);
4321 }
4322
4323 const char *
if_getdescr(if_t ifp)4324 if_getdescr(if_t ifp)
4325 {
4326 return (ifp->if_description);
4327 }
4328
4329 void
if_setdescr(if_t ifp,char * descrbuf)4330 if_setdescr(if_t ifp, char *descrbuf)
4331 {
4332 sx_xlock(&ifdescr_sx);
4333 char *odescrbuf = ifp->if_description;
4334 ifp->if_description = descrbuf;
4335 sx_xunlock(&ifdescr_sx);
4336
4337 if_freedescr(odescrbuf);
4338 }
4339
4340 char *
if_allocdescr(size_t sz,int malloc_flag)4341 if_allocdescr(size_t sz, int malloc_flag)
4342 {
4343 malloc_flag &= (M_WAITOK | M_NOWAIT);
4344 return (malloc(sz, M_IFDESCR, M_ZERO | malloc_flag));
4345 }
4346
4347 void
if_freedescr(char * descrbuf)4348 if_freedescr(char *descrbuf)
4349 {
4350 free(descrbuf, M_IFDESCR);
4351 }
4352
4353 int
if_getalloctype(const if_t ifp)4354 if_getalloctype(const if_t ifp)
4355 {
4356 return (ifp->if_alloctype);
4357 }
4358
4359 void
if_setlastchange(if_t ifp)4360 if_setlastchange(if_t ifp)
4361 {
4362 getmicrotime(&ifp->if_lastchange);
4363 }
4364
4365 /*
4366 * This is largely undesirable because it ties ifnet to a device, but does
4367 * provide flexiblity for an embedded product vendor. Should be used with
4368 * the understanding that it violates the interface boundaries, and should be
4369 * a last resort only.
4370 */
4371 int
if_setdev(if_t ifp,void * dev)4372 if_setdev(if_t ifp, void *dev)
4373 {
4374 return (0);
4375 }
4376
4377 int
if_setdrvflagbits(if_t ifp,int set_flags,int clear_flags)4378 if_setdrvflagbits(if_t ifp, int set_flags, int clear_flags)
4379 {
4380 ifp->if_drv_flags &= ~clear_flags;
4381 ifp->if_drv_flags |= set_flags;
4382
4383 return (0);
4384 }
4385
4386 int
if_getdrvflags(const if_t ifp)4387 if_getdrvflags(const if_t ifp)
4388 {
4389 return (ifp->if_drv_flags);
4390 }
4391
4392 int
if_setdrvflags(if_t ifp,int flags)4393 if_setdrvflags(if_t ifp, int flags)
4394 {
4395 ifp->if_drv_flags = flags;
4396 return (0);
4397 }
4398
4399 int
if_setflags(if_t ifp,int flags)4400 if_setflags(if_t ifp, int flags)
4401 {
4402 ifp->if_flags = flags;
4403 return (0);
4404 }
4405
4406 int
if_setflagbits(if_t ifp,int set,int clear)4407 if_setflagbits(if_t ifp, int set, int clear)
4408 {
4409 ifp->if_flags &= ~clear;
4410 ifp->if_flags |= set;
4411 return (0);
4412 }
4413
4414 int
if_getflags(const if_t ifp)4415 if_getflags(const if_t ifp)
4416 {
4417 return (ifp->if_flags);
4418 }
4419
4420 int
if_clearhwassist(if_t ifp)4421 if_clearhwassist(if_t ifp)
4422 {
4423 ifp->if_hwassist = 0;
4424 return (0);
4425 }
4426
4427 int
if_sethwassistbits(if_t ifp,int toset,int toclear)4428 if_sethwassistbits(if_t ifp, int toset, int toclear)
4429 {
4430 ifp->if_hwassist &= ~toclear;
4431 ifp->if_hwassist |= toset;
4432
4433 return (0);
4434 }
4435
4436 int
if_sethwassist(if_t ifp,int hwassist_bit)4437 if_sethwassist(if_t ifp, int hwassist_bit)
4438 {
4439 ifp->if_hwassist = hwassist_bit;
4440 return (0);
4441 }
4442
4443 int
if_gethwassist(const if_t ifp)4444 if_gethwassist(const if_t ifp)
4445 {
4446 return (ifp->if_hwassist);
4447 }
4448
4449 int
if_togglehwassist(if_t ifp,int toggle_bits)4450 if_togglehwassist(if_t ifp, int toggle_bits)
4451 {
4452 ifp->if_hwassist ^= toggle_bits;
4453 return (0);
4454 }
4455
4456 int
if_setmtu(if_t ifp,int mtu)4457 if_setmtu(if_t ifp, int mtu)
4458 {
4459 ifp->if_mtu = mtu;
4460 return (0);
4461 }
4462
4463 void
if_notifymtu(if_t ifp)4464 if_notifymtu(if_t ifp)
4465 {
4466 #ifdef INET6
4467 nd6_setmtu(ifp);
4468 #endif
4469 rt_updatemtu(ifp);
4470 }
4471
4472 int
if_getmtu(const if_t ifp)4473 if_getmtu(const if_t ifp)
4474 {
4475 return (ifp->if_mtu);
4476 }
4477
4478 int
if_getmtu_family(const if_t ifp,int family)4479 if_getmtu_family(const if_t ifp, int family)
4480 {
4481 struct domain *dp;
4482
4483 SLIST_FOREACH(dp, &domains, dom_next) {
4484 if (dp->dom_family == family && dp->dom_ifmtu != NULL)
4485 return (dp->dom_ifmtu(ifp));
4486 }
4487
4488 return (ifp->if_mtu);
4489 }
4490
4491 /*
4492 * Methods for drivers to access interface unicast and multicast
4493 * link level addresses. Driver shall not know 'struct ifaddr' neither
4494 * 'struct ifmultiaddr'.
4495 */
4496 u_int
if_lladdr_count(if_t ifp)4497 if_lladdr_count(if_t ifp)
4498 {
4499 struct epoch_tracker et;
4500 struct ifaddr *ifa;
4501 u_int count;
4502
4503 count = 0;
4504 NET_EPOCH_ENTER(et);
4505 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
4506 if (ifa->ifa_addr->sa_family == AF_LINK)
4507 count++;
4508 NET_EPOCH_EXIT(et);
4509
4510 return (count);
4511 }
4512
4513 int
if_foreach(if_foreach_cb_t cb,void * cb_arg)4514 if_foreach(if_foreach_cb_t cb, void *cb_arg)
4515 {
4516 if_t ifp;
4517 int error;
4518
4519 NET_EPOCH_ASSERT();
4520 MPASS(cb);
4521
4522 error = 0;
4523 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
4524 error = cb(ifp, cb_arg);
4525 if (error != 0)
4526 break;
4527 }
4528
4529 return (error);
4530 }
4531
4532 /*
4533 * Iterates over the list of interfaces, permitting callback function @cb to sleep.
4534 * Stops iteration if @cb returns non-zero error code.
4535 * Returns the last error code from @cb.
4536 * @match_cb: optional match callback limiting the iteration to only matched interfaces
4537 * @match_arg: argument to pass to @match_cb
4538 * @cb: iteration callback
4539 * @cb_arg: argument to pass to @cb
4540 */
4541 int
if_foreach_sleep(if_foreach_match_t match_cb,void * match_arg,if_foreach_cb_t cb,void * cb_arg)4542 if_foreach_sleep(if_foreach_match_t match_cb, void *match_arg, if_foreach_cb_t cb,
4543 void *cb_arg)
4544 {
4545 int match_count = 0, array_size = 16; /* 128 bytes for malloc */
4546 struct ifnet **match_array = NULL;
4547 int error = 0;
4548
4549 MPASS(cb);
4550
4551 while (true) {
4552 struct ifnet **new_array;
4553 int new_size = array_size;
4554 struct epoch_tracker et;
4555 struct ifnet *ifp;
4556
4557 while (new_size < match_count)
4558 new_size *= 2;
4559 new_array = malloc(new_size * sizeof(void *), M_TEMP, M_WAITOK);
4560 if (match_array != NULL)
4561 memcpy(new_array, match_array, array_size * sizeof(void *));
4562 free(match_array, M_TEMP);
4563 match_array = new_array;
4564 array_size = new_size;
4565
4566 match_count = 0;
4567 NET_EPOCH_ENTER(et);
4568 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
4569 if (match_cb != NULL && !match_cb(ifp, match_arg))
4570 continue;
4571 if (match_count < array_size) {
4572 if (if_try_ref(ifp))
4573 match_array[match_count++] = ifp;
4574 } else
4575 match_count++;
4576 }
4577 NET_EPOCH_EXIT(et);
4578
4579 if (match_count > array_size) {
4580 for (int i = 0; i < array_size; i++)
4581 if_rele(match_array[i]);
4582 continue;
4583 } else {
4584 for (int i = 0; i < match_count; i++) {
4585 if (error == 0)
4586 error = cb(match_array[i], cb_arg);
4587 if_rele(match_array[i]);
4588 }
4589 free(match_array, M_TEMP);
4590 break;
4591 }
4592 }
4593
4594 return (error);
4595 }
4596
4597
4598 /*
4599 * Uses just 1 pointer of the 4 available in the public struct.
4600 */
4601 if_t
if_iter_start(struct if_iter * iter)4602 if_iter_start(struct if_iter *iter)
4603 {
4604 if_t ifp;
4605
4606 NET_EPOCH_ASSERT();
4607
4608 bzero(iter, sizeof(*iter));
4609 ifp = CK_STAILQ_FIRST(&V_ifnet);
4610 if (ifp != NULL)
4611 iter->context[0] = CK_STAILQ_NEXT(ifp, if_link);
4612 else
4613 iter->context[0] = NULL;
4614 return (ifp);
4615 }
4616
4617 if_t
if_iter_next(struct if_iter * iter)4618 if_iter_next(struct if_iter *iter)
4619 {
4620 if_t cur_ifp = iter->context[0];
4621
4622 if (cur_ifp != NULL)
4623 iter->context[0] = CK_STAILQ_NEXT(cur_ifp, if_link);
4624 return (cur_ifp);
4625 }
4626
4627 void
if_iter_finish(struct if_iter * iter)4628 if_iter_finish(struct if_iter *iter)
4629 {
4630 /* Nothing to do here for now. */
4631 }
4632
4633 u_int
if_foreach_lladdr(if_t ifp,iflladdr_cb_t cb,void * cb_arg)4634 if_foreach_lladdr(if_t ifp, iflladdr_cb_t cb, void *cb_arg)
4635 {
4636 struct epoch_tracker et;
4637 struct ifaddr *ifa;
4638 u_int count;
4639
4640 MPASS(cb);
4641
4642 count = 0;
4643 NET_EPOCH_ENTER(et);
4644 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
4645 if (ifa->ifa_addr->sa_family != AF_LINK)
4646 continue;
4647 count += (*cb)(cb_arg, (struct sockaddr_dl *)ifa->ifa_addr,
4648 count);
4649 }
4650 NET_EPOCH_EXIT(et);
4651
4652 return (count);
4653 }
4654
4655 u_int
if_llmaddr_count(if_t ifp)4656 if_llmaddr_count(if_t ifp)
4657 {
4658 struct epoch_tracker et;
4659 struct ifmultiaddr *ifma;
4660 int count;
4661
4662 count = 0;
4663 NET_EPOCH_ENTER(et);
4664 CK_STAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
4665 if (ifma->ifma_addr->sa_family == AF_LINK)
4666 count++;
4667 NET_EPOCH_EXIT(et);
4668
4669 return (count);
4670 }
4671
4672 bool
if_maddr_empty(if_t ifp)4673 if_maddr_empty(if_t ifp)
4674 {
4675
4676 return (CK_STAILQ_EMPTY(&ifp->if_multiaddrs));
4677 }
4678
4679 u_int
if_foreach_llmaddr(if_t ifp,iflladdr_cb_t cb,void * cb_arg)4680 if_foreach_llmaddr(if_t ifp, iflladdr_cb_t cb, void *cb_arg)
4681 {
4682 struct epoch_tracker et;
4683 struct ifmultiaddr *ifma;
4684 u_int count;
4685
4686 MPASS(cb);
4687
4688 count = 0;
4689 NET_EPOCH_ENTER(et);
4690 CK_STAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
4691 if (ifma->ifma_addr->sa_family != AF_LINK)
4692 continue;
4693 count += (*cb)(cb_arg, (struct sockaddr_dl *)ifma->ifma_addr,
4694 count);
4695 }
4696 NET_EPOCH_EXIT(et);
4697
4698 return (count);
4699 }
4700
4701 u_int
if_foreach_addr_type(if_t ifp,int type,if_addr_cb_t cb,void * cb_arg)4702 if_foreach_addr_type(if_t ifp, int type, if_addr_cb_t cb, void *cb_arg)
4703 {
4704 struct epoch_tracker et;
4705 struct ifaddr *ifa;
4706 u_int count;
4707
4708 MPASS(cb);
4709
4710 count = 0;
4711 NET_EPOCH_ENTER(et);
4712 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
4713 if (ifa->ifa_addr->sa_family != type)
4714 continue;
4715 count += (*cb)(cb_arg, ifa, count);
4716 }
4717 NET_EPOCH_EXIT(et);
4718
4719 return (count);
4720 }
4721
4722 struct ifaddr *
ifa_iter_start(if_t ifp,struct ifa_iter * iter)4723 ifa_iter_start(if_t ifp, struct ifa_iter *iter)
4724 {
4725 struct ifaddr *ifa;
4726
4727 NET_EPOCH_ASSERT();
4728
4729 bzero(iter, sizeof(*iter));
4730 ifa = CK_STAILQ_FIRST(&ifp->if_addrhead);
4731 if (ifa != NULL)
4732 iter->context[0] = CK_STAILQ_NEXT(ifa, ifa_link);
4733 else
4734 iter->context[0] = NULL;
4735 return (ifa);
4736 }
4737
4738 struct ifaddr *
ifa_iter_next(struct ifa_iter * iter)4739 ifa_iter_next(struct ifa_iter *iter)
4740 {
4741 struct ifaddr *ifa = iter->context[0];
4742
4743 if (ifa != NULL)
4744 iter->context[0] = CK_STAILQ_NEXT(ifa, ifa_link);
4745 return (ifa);
4746 }
4747
4748 void
ifa_iter_finish(struct ifa_iter * iter)4749 ifa_iter_finish(struct ifa_iter *iter)
4750 {
4751 /* Nothing to do here for now. */
4752 }
4753
4754 int
if_setsoftc(if_t ifp,void * softc)4755 if_setsoftc(if_t ifp, void *softc)
4756 {
4757 ifp->if_softc = softc;
4758 return (0);
4759 }
4760
4761 void *
if_getsoftc(const if_t ifp)4762 if_getsoftc(const if_t ifp)
4763 {
4764 return (ifp->if_softc);
4765 }
4766
4767 void
if_setrcvif(struct mbuf * m,if_t ifp)4768 if_setrcvif(struct mbuf *m, if_t ifp)
4769 {
4770
4771 MPASS((m->m_pkthdr.csum_flags & CSUM_SND_TAG) == 0);
4772 m->m_pkthdr.rcvif = (struct ifnet *)ifp;
4773 }
4774
4775 void
if_setvtag(struct mbuf * m,uint16_t tag)4776 if_setvtag(struct mbuf *m, uint16_t tag)
4777 {
4778 m->m_pkthdr.ether_vtag = tag;
4779 }
4780
4781 uint16_t
if_getvtag(struct mbuf * m)4782 if_getvtag(struct mbuf *m)
4783 {
4784 return (m->m_pkthdr.ether_vtag);
4785 }
4786
4787 int
if_sendq_empty(if_t ifp)4788 if_sendq_empty(if_t ifp)
4789 {
4790 return (IFQ_DRV_IS_EMPTY(&ifp->if_snd));
4791 }
4792
4793 struct ifaddr *
if_getifaddr(const if_t ifp)4794 if_getifaddr(const if_t ifp)
4795 {
4796 return (ifp->if_addr);
4797 }
4798
4799 int
if_setsendqready(if_t ifp)4800 if_setsendqready(if_t ifp)
4801 {
4802 IFQ_SET_READY(&ifp->if_snd);
4803 return (0);
4804 }
4805
4806 int
if_setsendqlen(if_t ifp,int tx_desc_count)4807 if_setsendqlen(if_t ifp, int tx_desc_count)
4808 {
4809 IFQ_SET_MAXLEN(&ifp->if_snd, tx_desc_count);
4810 ifp->if_snd.ifq_drv_maxlen = tx_desc_count;
4811 return (0);
4812 }
4813
4814 void
if_setnetmapadapter(if_t ifp,struct netmap_adapter * na)4815 if_setnetmapadapter(if_t ifp, struct netmap_adapter *na)
4816 {
4817 ifp->if_netmap = na;
4818 }
4819
4820 struct netmap_adapter *
if_getnetmapadapter(if_t ifp)4821 if_getnetmapadapter(if_t ifp)
4822 {
4823 return (ifp->if_netmap);
4824 }
4825
4826 int
if_vlantrunkinuse(if_t ifp)4827 if_vlantrunkinuse(if_t ifp)
4828 {
4829 return (ifp->if_vlantrunk != NULL);
4830 }
4831
4832 void
if_init(if_t ifp,void * ctx)4833 if_init(if_t ifp, void *ctx)
4834 {
4835 (*ifp->if_init)(ctx);
4836 }
4837
4838 void
if_input(if_t ifp,struct mbuf * sendmp)4839 if_input(if_t ifp, struct mbuf* sendmp)
4840 {
4841 (*ifp->if_input)(ifp, sendmp);
4842 }
4843
4844 int
if_transmit(if_t ifp,struct mbuf * m)4845 if_transmit(if_t ifp, struct mbuf *m)
4846 {
4847 return ((*ifp->if_transmit)(ifp, m));
4848 }
4849
4850 int
if_resolvemulti(if_t ifp,struct sockaddr ** srcs,struct sockaddr * dst)4851 if_resolvemulti(if_t ifp, struct sockaddr **srcs, struct sockaddr *dst)
4852 {
4853 if (ifp->if_resolvemulti == NULL)
4854 return (EOPNOTSUPP);
4855
4856 return (ifp->if_resolvemulti(ifp, srcs, dst));
4857 }
4858
4859 int
if_ioctl(if_t ifp,u_long cmd,void * data)4860 if_ioctl(if_t ifp, u_long cmd, void *data)
4861 {
4862 if (ifp->if_ioctl == NULL)
4863 return (EOPNOTSUPP);
4864
4865 return (ifp->if_ioctl(ifp, cmd, data));
4866 }
4867
4868 struct mbuf *
if_dequeue(if_t ifp)4869 if_dequeue(if_t ifp)
4870 {
4871 struct mbuf *m;
4872
4873 IFQ_DRV_DEQUEUE(&ifp->if_snd, m);
4874 return (m);
4875 }
4876
4877 int
if_sendq_prepend(if_t ifp,struct mbuf * m)4878 if_sendq_prepend(if_t ifp, struct mbuf *m)
4879 {
4880 IFQ_DRV_PREPEND(&ifp->if_snd, m);
4881 return (0);
4882 }
4883
4884 int
if_setifheaderlen(if_t ifp,int len)4885 if_setifheaderlen(if_t ifp, int len)
4886 {
4887 ifp->if_hdrlen = len;
4888 return (0);
4889 }
4890
4891 caddr_t
if_getlladdr(const if_t ifp)4892 if_getlladdr(const if_t ifp)
4893 {
4894 return (IF_LLADDR(ifp));
4895 }
4896
4897 void *
if_gethandle(u_char type)4898 if_gethandle(u_char type)
4899 {
4900 return (if_alloc(type));
4901 }
4902
4903 void
if_bpfmtap(if_t ifp,struct mbuf * m)4904 if_bpfmtap(if_t ifp, struct mbuf *m)
4905 {
4906 BPF_MTAP(ifp, m);
4907 }
4908
4909 void
if_etherbpfmtap(if_t ifp,struct mbuf * m)4910 if_etherbpfmtap(if_t ifp, struct mbuf *m)
4911 {
4912 ETHER_BPF_MTAP(ifp, m);
4913 }
4914
4915 void
if_vlancap(if_t ifp)4916 if_vlancap(if_t ifp)
4917 {
4918 VLAN_CAPABILITIES(ifp);
4919 }
4920
4921 int
if_sethwtsomax(if_t ifp,u_int if_hw_tsomax)4922 if_sethwtsomax(if_t ifp, u_int if_hw_tsomax)
4923 {
4924 ifp->if_hw_tsomax = if_hw_tsomax;
4925 return (0);
4926 }
4927
4928 int
if_sethwtsomaxsegcount(if_t ifp,u_int if_hw_tsomaxsegcount)4929 if_sethwtsomaxsegcount(if_t ifp, u_int if_hw_tsomaxsegcount)
4930 {
4931 ifp->if_hw_tsomaxsegcount = if_hw_tsomaxsegcount;
4932 return (0);
4933 }
4934
4935 int
if_sethwtsomaxsegsize(if_t ifp,u_int if_hw_tsomaxsegsize)4936 if_sethwtsomaxsegsize(if_t ifp, u_int if_hw_tsomaxsegsize)
4937 {
4938 ifp->if_hw_tsomaxsegsize = if_hw_tsomaxsegsize;
4939 return (0);
4940 }
4941
4942 u_int
if_gethwtsomax(const if_t ifp)4943 if_gethwtsomax(const if_t ifp)
4944 {
4945 return (ifp->if_hw_tsomax);
4946 }
4947
4948 u_int
if_gethwtsomaxsegcount(const if_t ifp)4949 if_gethwtsomaxsegcount(const if_t ifp)
4950 {
4951 return (ifp->if_hw_tsomaxsegcount);
4952 }
4953
4954 u_int
if_gethwtsomaxsegsize(const if_t ifp)4955 if_gethwtsomaxsegsize(const if_t ifp)
4956 {
4957 return (ifp->if_hw_tsomaxsegsize);
4958 }
4959
4960 void
if_setinitfn(if_t ifp,if_init_fn_t init_fn)4961 if_setinitfn(if_t ifp, if_init_fn_t init_fn)
4962 {
4963 ifp->if_init = init_fn;
4964 }
4965
4966 void
if_setinputfn(if_t ifp,if_input_fn_t input_fn)4967 if_setinputfn(if_t ifp, if_input_fn_t input_fn)
4968 {
4969 ifp->if_input = input_fn;
4970 }
4971
4972 if_input_fn_t
if_getinputfn(if_t ifp)4973 if_getinputfn(if_t ifp)
4974 {
4975 return (ifp->if_input);
4976 }
4977
4978 void
if_setioctlfn(if_t ifp,if_ioctl_fn_t ioctl_fn)4979 if_setioctlfn(if_t ifp, if_ioctl_fn_t ioctl_fn)
4980 {
4981 ifp->if_ioctl = ioctl_fn;
4982 }
4983
4984 void
if_setoutputfn(if_t ifp,if_output_fn_t output_fn)4985 if_setoutputfn(if_t ifp, if_output_fn_t output_fn)
4986 {
4987 ifp->if_output = output_fn;
4988 }
4989
4990 void
if_setstartfn(if_t ifp,if_start_fn_t start_fn)4991 if_setstartfn(if_t ifp, if_start_fn_t start_fn)
4992 {
4993 ifp->if_start = start_fn;
4994 }
4995
4996 if_start_fn_t
if_getstartfn(if_t ifp)4997 if_getstartfn(if_t ifp)
4998 {
4999 return (ifp->if_start);
5000 }
5001
5002 void
if_settransmitfn(if_t ifp,if_transmit_fn_t start_fn)5003 if_settransmitfn(if_t ifp, if_transmit_fn_t start_fn)
5004 {
5005 ifp->if_transmit = start_fn;
5006 }
5007
5008 if_transmit_fn_t
if_gettransmitfn(if_t ifp)5009 if_gettransmitfn(if_t ifp)
5010 {
5011 return (ifp->if_transmit);
5012 }
5013
5014 void
if_setqflushfn(if_t ifp,if_qflush_fn_t flush_fn)5015 if_setqflushfn(if_t ifp, if_qflush_fn_t flush_fn)
5016 {
5017 ifp->if_qflush = flush_fn;
5018 }
5019
5020 void
if_setsndtagallocfn(if_t ifp,if_snd_tag_alloc_t alloc_fn)5021 if_setsndtagallocfn(if_t ifp, if_snd_tag_alloc_t alloc_fn)
5022 {
5023 ifp->if_snd_tag_alloc = alloc_fn;
5024 }
5025
5026 int
if_snd_tag_alloc(if_t ifp,union if_snd_tag_alloc_params * params,struct m_snd_tag ** mstp)5027 if_snd_tag_alloc(if_t ifp, union if_snd_tag_alloc_params *params,
5028 struct m_snd_tag **mstp)
5029 {
5030 if (ifp->if_snd_tag_alloc == NULL)
5031 return (EOPNOTSUPP);
5032 return (ifp->if_snd_tag_alloc(ifp, params, mstp));
5033 }
5034
5035 void
if_setgetcounterfn(if_t ifp,if_get_counter_t fn)5036 if_setgetcounterfn(if_t ifp, if_get_counter_t fn)
5037 {
5038 ifp->if_get_counter = fn;
5039 }
5040
5041 void
if_setreassignfn(if_t ifp,if_reassign_fn_t fn)5042 if_setreassignfn(if_t ifp, if_reassign_fn_t fn)
5043 {
5044 ifp->if_reassign = fn;
5045 }
5046
5047 void
if_setratelimitqueryfn(if_t ifp,if_ratelimit_query_t fn)5048 if_setratelimitqueryfn(if_t ifp, if_ratelimit_query_t fn)
5049 {
5050 ifp->if_ratelimit_query = fn;
5051 }
5052
5053 void
if_setdebugnet_methods(if_t ifp,struct debugnet_methods * m)5054 if_setdebugnet_methods(if_t ifp, struct debugnet_methods *m)
5055 {
5056 ifp->if_debugnet_methods = m;
5057 }
5058
5059 struct label *
if_getmaclabel(if_t ifp)5060 if_getmaclabel(if_t ifp)
5061 {
5062 return (ifp->if_label);
5063 }
5064
5065 void
if_setmaclabel(if_t ifp,struct label * label)5066 if_setmaclabel(if_t ifp, struct label *label)
5067 {
5068 ifp->if_label = label;
5069 }
5070
5071 int
if_gettype(if_t ifp)5072 if_gettype(if_t ifp)
5073 {
5074 return (ifp->if_type);
5075 }
5076
5077 void *
if_getllsoftc(if_t ifp)5078 if_getllsoftc(if_t ifp)
5079 {
5080 return (ifp->if_llsoftc);
5081 }
5082
5083 void
if_setllsoftc(if_t ifp,void * llsoftc)5084 if_setllsoftc(if_t ifp, void *llsoftc)
5085 {
5086 ifp->if_llsoftc = llsoftc;
5087 };
5088
5089 int
if_getlinkstate(if_t ifp)5090 if_getlinkstate(if_t ifp)
5091 {
5092 return (ifp->if_link_state);
5093 }
5094
5095 const uint8_t *
if_getbroadcastaddr(if_t ifp)5096 if_getbroadcastaddr(if_t ifp)
5097 {
5098 return (ifp->if_broadcastaddr);
5099 }
5100
5101 void
if_setbroadcastaddr(if_t ifp,const uint8_t * addr)5102 if_setbroadcastaddr(if_t ifp, const uint8_t *addr)
5103 {
5104 ifp->if_broadcastaddr = addr;
5105 }
5106
5107 int
if_getnumadomain(if_t ifp)5108 if_getnumadomain(if_t ifp)
5109 {
5110 return (ifp->if_numa_domain);
5111 }
5112
5113 uint64_t
if_getcounter(if_t ifp,ift_counter counter)5114 if_getcounter(if_t ifp, ift_counter counter)
5115 {
5116 return (ifp->if_get_counter(ifp, counter));
5117 }
5118
5119 bool
if_altq_is_enabled(if_t ifp)5120 if_altq_is_enabled(if_t ifp)
5121 {
5122 return (ALTQ_IS_ENABLED(&ifp->if_snd));
5123 }
5124
5125 struct vnet *
if_getvnet(if_t ifp)5126 if_getvnet(if_t ifp)
5127 {
5128 return (ifp->if_vnet);
5129 }
5130
5131 void *
if_getafdata(if_t ifp,int af)5132 if_getafdata(if_t ifp, int af)
5133 {
5134 return (ifp->if_afdata[af]);
5135 }
5136
5137 u_int
if_getfib(if_t ifp)5138 if_getfib(if_t ifp)
5139 {
5140 return (ifp->if_fib);
5141 }
5142
5143 uint8_t
if_getaddrlen(if_t ifp)5144 if_getaddrlen(if_t ifp)
5145 {
5146 return (ifp->if_addrlen);
5147 }
5148
5149 struct bpf_if *
if_getbpf(if_t ifp)5150 if_getbpf(if_t ifp)
5151 {
5152 return (ifp->if_bpf);
5153 }
5154
5155 struct ifvlantrunk *
if_getvlantrunk(if_t ifp)5156 if_getvlantrunk(if_t ifp)
5157 {
5158 return (ifp->if_vlantrunk);
5159 }
5160
5161 uint8_t
if_getpcp(if_t ifp)5162 if_getpcp(if_t ifp)
5163 {
5164 return (ifp->if_pcp);
5165 }
5166
5167 void *
if_getl2com(if_t ifp)5168 if_getl2com(if_t ifp)
5169 {
5170 return (ifp->if_l2com);
5171 }
5172
5173 #ifdef DDB
5174 static void
if_show_ifnet(struct ifnet * ifp)5175 if_show_ifnet(struct ifnet *ifp)
5176 {
5177 if (ifp == NULL)
5178 return;
5179 db_printf("%s:\n", ifp->if_xname);
5180 #define IF_DB_PRINTF(f, e) db_printf(" %s = " f "\n", #e, ifp->e);
5181 IF_DB_PRINTF("%s", if_dname);
5182 IF_DB_PRINTF("%d", if_dunit);
5183 IF_DB_PRINTF("%s", if_description);
5184 IF_DB_PRINTF("%u", if_index);
5185 IF_DB_PRINTF("%d", if_idxgen);
5186 IF_DB_PRINTF("%u", if_refcount);
5187 IF_DB_PRINTF("%p", if_softc);
5188 IF_DB_PRINTF("%p", if_l2com);
5189 IF_DB_PRINTF("%p", if_llsoftc);
5190 IF_DB_PRINTF("%d", if_amcount);
5191 IF_DB_PRINTF("%p", if_addr);
5192 IF_DB_PRINTF("%p", if_broadcastaddr);
5193 IF_DB_PRINTF("%p", if_afdata);
5194 IF_DB_PRINTF("%d", if_afdata_initialized);
5195 IF_DB_PRINTF("%u", if_fib);
5196 IF_DB_PRINTF("%p", if_vnet);
5197 IF_DB_PRINTF("%p", if_home_vnet);
5198 IF_DB_PRINTF("%p", if_vlantrunk);
5199 IF_DB_PRINTF("%p", if_bpf);
5200 IF_DB_PRINTF("%u", if_pcount);
5201 IF_DB_PRINTF("%p", if_bridge);
5202 IF_DB_PRINTF("%p", if_lagg);
5203 IF_DB_PRINTF("%p", if_pf_kif);
5204 IF_DB_PRINTF("%p", if_carp);
5205 IF_DB_PRINTF("%p", if_label);
5206 IF_DB_PRINTF("%p", if_netmap);
5207 IF_DB_PRINTF("0x%08x", if_flags);
5208 IF_DB_PRINTF("0x%08x", if_drv_flags);
5209 IF_DB_PRINTF("0x%08x", if_capabilities);
5210 IF_DB_PRINTF("0x%08x", if_capenable);
5211 IF_DB_PRINTF("%p", if_snd.ifq_head);
5212 IF_DB_PRINTF("%p", if_snd.ifq_tail);
5213 IF_DB_PRINTF("%d", if_snd.ifq_len);
5214 IF_DB_PRINTF("%d", if_snd.ifq_maxlen);
5215 IF_DB_PRINTF("%p", if_snd.ifq_drv_head);
5216 IF_DB_PRINTF("%p", if_snd.ifq_drv_tail);
5217 IF_DB_PRINTF("%d", if_snd.ifq_drv_len);
5218 IF_DB_PRINTF("%d", if_snd.ifq_drv_maxlen);
5219 IF_DB_PRINTF("%d", if_snd.altq_type);
5220 IF_DB_PRINTF("%x", if_snd.altq_flags);
5221 #undef IF_DB_PRINTF
5222 }
5223
DB_SHOW_COMMAND(ifnet,db_show_ifnet)5224 DB_SHOW_COMMAND(ifnet, db_show_ifnet)
5225 {
5226 if (!have_addr) {
5227 db_printf("usage: show ifnet <struct ifnet *>\n");
5228 return;
5229 }
5230
5231 if_show_ifnet((struct ifnet *)addr);
5232 }
5233
DB_SHOW_ALL_COMMAND(ifnets,db_show_all_ifnets)5234 DB_SHOW_ALL_COMMAND(ifnets, db_show_all_ifnets)
5235 {
5236 struct ifnet *ifp;
5237 u_short idx;
5238
5239 for (idx = 1; idx <= if_index; idx++) {
5240 ifp = ifindex_table[idx].ife_ifnet;
5241 if (ifp == NULL)
5242 continue;
5243 db_printf( "%20s ifp=%p\n", ifp->if_xname, ifp);
5244 if (db_pager_quit)
5245 break;
5246 }
5247 }
5248 #endif /* DDB */
5249