1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 2010 Bjoern A. Zeeb <bz@FreeBSD.org>
5 * Copyright (c) 1980, 1986, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 #include "opt_bpf.h"
34 #include "opt_inet6.h"
35 #include "opt_inet.h"
36 #include "opt_ddb.h"
37
38 #include <sys/param.h>
39 #include <sys/capsicum.h>
40 #include <sys/conf.h>
41 #include <sys/eventhandler.h>
42 #include <sys/malloc.h>
43 #include <sys/domainset.h>
44 #include <sys/sbuf.h>
45 #include <sys/bus.h>
46 #include <sys/epoch.h>
47 #include <sys/mbuf.h>
48 #include <sys/systm.h>
49 #include <sys/priv.h>
50 #include <sys/proc.h>
51 #include <sys/socket.h>
52 #include <sys/socketvar.h>
53 #include <sys/protosw.h>
54 #include <sys/kernel.h>
55 #include <sys/lock.h>
56 #include <sys/refcount.h>
57 #include <sys/module.h>
58 #include <sys/nv.h>
59 #include <sys/rwlock.h>
60 #include <sys/sockio.h>
61 #include <sys/stdarg.h>
62 #include <sys/syslog.h>
63 #include <sys/sysctl.h>
64 #include <sys/sysent.h>
65 #include <sys/taskqueue.h>
66 #include <sys/domain.h>
67 #include <sys/jail.h>
68 #include <sys/priv.h>
69
70 #ifdef DDB
71 #include <ddb/ddb.h>
72 #endif
73
74 #include <vm/uma.h>
75
76 #include <net/bpf.h>
77 #include <net/if.h>
78 #include <net/if_arp.h>
79 #include <net/if_clone.h>
80 #include <net/if_dl.h>
81 #include <net/if_strings.h>
82 #include <net/if_types.h>
83 #include <net/if_var.h>
84 #include <net/if_media.h>
85 #include <net/if_mib.h>
86 #include <net/if_private.h>
87 #include <net/if_vlan_var.h>
88 #include <net/radix.h>
89 #include <net/route.h>
90 #include <net/route/route_ctl.h>
91 #include <net/vnet.h>
92
93 #if defined(INET) || defined(INET6)
94 #include <net/ethernet.h>
95 #include <netinet/in.h>
96 #include <netinet/in_var.h>
97 #include <netinet/ip.h>
98 #include <netinet/ip_carp.h>
99 #ifdef INET
100 #include <net/debugnet.h>
101 #include <netinet/if_ether.h>
102 #endif /* INET */
103 #ifdef INET6
104 #include <netinet6/in6_var.h>
105 #include <netinet6/in6_ifattach.h>
106 #endif /* INET6 */
107 #endif /* INET || INET6 */
108
109 #include <security/mac/mac_framework.h>
110
111 /*
112 * Consumers of struct ifreq such as tcpdump assume no pad between ifr_name
113 * and ifr_ifru when it is used in SIOCGIFCONF.
114 */
115 _Static_assert(sizeof(((struct ifreq *)0)->ifr_name) ==
116 offsetof(struct ifreq, ifr_ifru), "gap between ifr_name and ifr_ifru");
117
118 __read_mostly epoch_t net_epoch_preempt;
119 #ifdef COMPAT_FREEBSD32
120 #include <sys/mount.h>
121 #include <compat/freebsd32/freebsd32.h>
122
123 struct ifreq_buffer32 {
124 uint32_t length; /* (size_t) */
125 uint32_t buffer; /* (void *) */
126 };
127
128 /*
129 * Interface request structure used for socket
130 * ioctl's. All interface ioctl's must have parameter
131 * definitions which begin with ifr_name. The
132 * remainder may be interface specific.
133 */
134 struct ifreq32 {
135 char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */
136 union {
137 struct sockaddr ifru_addr;
138 struct sockaddr ifru_dstaddr;
139 struct sockaddr ifru_broadaddr;
140 struct ifreq_buffer32 ifru_buffer;
141 short ifru_flags[2];
142 short ifru_index;
143 int ifru_jid;
144 int ifru_metric;
145 int ifru_mtu;
146 int ifru_phys;
147 int ifru_media;
148 uint32_t ifru_data;
149 int ifru_cap[2];
150 u_int ifru_fib;
151 u_char ifru_vlan_pcp;
152 } ifr_ifru;
153 };
154 CTASSERT(sizeof(struct ifreq) == sizeof(struct ifreq32));
155 CTASSERT(__offsetof(struct ifreq, ifr_ifru) ==
156 __offsetof(struct ifreq32, ifr_ifru));
157
158 struct ifconf32 {
159 int32_t ifc_len;
160 union {
161 uint32_t ifcu_buf;
162 uint32_t ifcu_req;
163 } ifc_ifcu;
164 };
165 #define SIOCGIFCONF32 _IOWR('i', 36, struct ifconf32)
166
167 struct ifdrv32 {
168 char ifd_name[IFNAMSIZ];
169 uint32_t ifd_cmd;
170 uint32_t ifd_len;
171 uint32_t ifd_data;
172 };
173 #define SIOCSDRVSPEC32 _IOC_NEWTYPE(SIOCSDRVSPEC, struct ifdrv32)
174 #define SIOCGDRVSPEC32 _IOC_NEWTYPE(SIOCGDRVSPEC, struct ifdrv32)
175
176 struct ifgroupreq32 {
177 char ifgr_name[IFNAMSIZ];
178 u_int ifgr_len;
179 union {
180 char ifgru_group[IFNAMSIZ];
181 uint32_t ifgru_groups;
182 } ifgr_ifgru;
183 };
184 #define SIOCAIFGROUP32 _IOC_NEWTYPE(SIOCAIFGROUP, struct ifgroupreq32)
185 #define SIOCGIFGROUP32 _IOC_NEWTYPE(SIOCGIFGROUP, struct ifgroupreq32)
186 #define SIOCDIFGROUP32 _IOC_NEWTYPE(SIOCDIFGROUP, struct ifgroupreq32)
187 #define SIOCGIFGMEMB32 _IOC_NEWTYPE(SIOCGIFGMEMB, struct ifgroupreq32)
188
189 struct ifmediareq32 {
190 char ifm_name[IFNAMSIZ];
191 int ifm_current;
192 int ifm_mask;
193 int ifm_status;
194 int ifm_active;
195 int ifm_count;
196 uint32_t ifm_ulist; /* (int *) */
197 };
198 #define SIOCGIFMEDIA32 _IOC_NEWTYPE(SIOCGIFMEDIA, struct ifmediareq32)
199 #define SIOCGIFXMEDIA32 _IOC_NEWTYPE(SIOCGIFXMEDIA, struct ifmediareq32)
200 #endif /* COMPAT_FREEBSD32 */
201
202 union ifreq_union {
203 struct ifreq ifr;
204 #ifdef COMPAT_FREEBSD32
205 struct ifreq32 ifr32;
206 #endif
207 };
208
209 SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
210 "Link layers");
211 SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
212 "Generic link-management");
213
214 SYSCTL_INT(_net_link, OID_AUTO, ifqmaxlen, CTLFLAG_RDTUN,
215 &ifqmaxlen, 0, "max send queue size");
216
217 /* Log link state change events */
218 static int log_link_state_change = 1;
219
220 SYSCTL_INT(_net_link, OID_AUTO, log_link_state_change, CTLFLAG_RW,
221 &log_link_state_change, 0,
222 "log interface link state change events");
223
224 /* Log promiscuous mode change events */
225 static int log_promisc_mode_change = 1;
226
227 SYSCTL_INT(_net_link, OID_AUTO, log_promisc_mode_change, CTLFLAG_RDTUN,
228 &log_promisc_mode_change, 1,
229 "log promiscuous mode change events");
230
231 /* Interface description */
232 static unsigned int ifdescr_maxlen = 1024;
233 SYSCTL_UINT(_net, OID_AUTO, ifdescr_maxlen, CTLFLAG_RW,
234 &ifdescr_maxlen, 0,
235 "administrative maximum length for interface description");
236
237 static MALLOC_DEFINE(M_IFDESCR, "ifdescr", "ifnet descriptions");
238
239 /* global sx for non-critical path ifdescr */
240 static struct sx ifdescr_sx;
241 SX_SYSINIT(ifdescr_sx, &ifdescr_sx, "ifnet descr");
242
243 void (*ng_ether_link_state_p)(struct ifnet *ifp, int state);
244 void (*lagg_linkstate_p)(struct ifnet *ifp, int state);
245 /* These are external hooks for CARP. */
246 void (*carp_linkstate_p)(struct ifnet *ifp);
247 void (*carp_demote_adj_p)(int, char *);
248 int (*carp_master_p)(struct ifaddr *);
249 #if defined(INET) || defined(INET6)
250 int (*carp_forus_p)(struct ifnet *ifp, u_char *dhost);
251 int (*carp_output_p)(struct ifnet *ifp, struct mbuf *m,
252 const struct sockaddr *sa);
253 int (*carp_ioctl_p)(struct ifreq *, u_long, struct thread *);
254 int (*carp_attach_p)(struct ifaddr *, int);
255 void (*carp_detach_p)(struct ifaddr *, bool);
256 #endif
257 #ifdef INET
258 int (*carp_iamatch_p)(struct ifaddr *, uint8_t **);
259 #endif
260 #ifdef INET6
261 struct ifaddr *(*carp_iamatch6_p)(struct ifnet *ifp, struct in6_addr *taddr6);
262 caddr_t (*carp_macmatch6_p)(struct ifnet *ifp, struct mbuf *m,
263 const struct in6_addr *taddr);
264 #endif
265
266 struct mbuf *(*tbr_dequeue_ptr)(struct ifaltq *, int) = NULL;
267
268 /*
269 * XXX: Style; these should be sorted alphabetically, and unprototyped
270 * static functions should be prototyped. Currently they are sorted by
271 * declaration order.
272 */
273 static void if_attachdomain(void *);
274 static void if_attachdomain1(struct ifnet *);
275 static int ifconf(u_long, caddr_t);
276 static void if_input_default(struct ifnet *, struct mbuf *);
277 static int if_requestencap_default(struct ifnet *, struct if_encap_req *);
278 static int if_setflag(struct ifnet *, int, int, int *, int);
279 static int if_transmit_default(struct ifnet *ifp, struct mbuf *m);
280 static int if_delmulti_locked(struct ifnet *, struct ifmultiaddr *, int);
281 static void do_link_state_change(void *, int);
282 static int if_getgroup(struct ifgroupreq *, struct ifnet *);
283 static int if_getgroupmembers(struct ifgroupreq *);
284 static void if_delgroups(struct ifnet *);
285 static void if_attach_internal(struct ifnet *, bool);
286 static void if_detach_internal(struct ifnet *, bool);
287 static void if_siocaddmulti(void *, int);
288 static void if_link_ifnet(struct ifnet *);
289 static bool if_unlink_ifnet(struct ifnet *, bool);
290 #ifdef VIMAGE
291 static void if_vmove(struct ifnet *, struct vnet *);
292 #endif
293
294 #ifdef INET6
295 /*
296 * XXX: declare here to avoid to include many inet6 related files..
297 * should be more generalized?
298 */
299 extern void nd6_setmtu(struct ifnet *);
300 #endif
301
302 /* ipsec helper hooks */
303 VNET_DEFINE(struct hhook_head *, ipsec_hhh_in[HHOOK_IPSEC_COUNT]);
304 VNET_DEFINE(struct hhook_head *, ipsec_hhh_out[HHOOK_IPSEC_COUNT]);
305
306 int ifqmaxlen = IFQ_MAXLEN;
307 VNET_DEFINE(struct ifnethead, ifnet); /* depend on static init XXX */
308 VNET_DEFINE(struct ifgrouphead, ifg_head);
309
310 /* Table of ifnet by index. */
311 static int if_index;
312 static int if_indexlim = 8;
313 static struct ifindex_entry {
314 struct ifnet *ife_ifnet;
315 uint16_t ife_gencnt;
316 } *ifindex_table;
317
318 SYSCTL_NODE(_net_link_generic, IFMIB_SYSTEM, system,
319 CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
320 "Variables global to all interfaces");
321 static int
sysctl_ifcount(SYSCTL_HANDLER_ARGS)322 sysctl_ifcount(SYSCTL_HANDLER_ARGS)
323 {
324 int rv = 0;
325
326 IFNET_RLOCK();
327 for (int i = 1; i <= if_index; i++)
328 if (ifindex_table[i].ife_ifnet != NULL &&
329 ifindex_table[i].ife_ifnet->if_vnet == curvnet)
330 rv = i;
331 IFNET_RUNLOCK();
332
333 return (sysctl_handle_int(oidp, &rv, 0, req));
334 }
335 SYSCTL_PROC(_net_link_generic_system, IFMIB_IFCOUNT, ifcount,
336 CTLTYPE_INT | CTLFLAG_VNET | CTLFLAG_RD, NULL, 0, sysctl_ifcount, "I",
337 "Maximum known interface index");
338
339 /*
340 * The global network interface list (V_ifnet) and related state (such as
341 * if_index, if_indexlim, and ifindex_table) are protected by an sxlock.
342 * This may be acquired to stabilise the list, or we may rely on NET_EPOCH.
343 */
344 struct sx ifnet_sxlock;
345 SX_SYSINIT_FLAGS(ifnet_sx, &ifnet_sxlock, "ifnet_sx", SX_RECURSE);
346
347 struct sx ifnet_detach_sxlock;
348 SX_SYSINIT_FLAGS(ifnet_detach, &ifnet_detach_sxlock, "ifnet_detach_sx",
349 SX_RECURSE);
350
351 #ifdef VIMAGE
352 #define VNET_IS_SHUTTING_DOWN(_vnet) \
353 ((_vnet)->vnet_shutdown && (_vnet)->vnet_state < SI_SUB_VNET_DONE)
354 #endif
355
356 static if_com_alloc_t *if_com_alloc[256];
357 static if_com_free_t *if_com_free[256];
358
359 static MALLOC_DEFINE(M_IFNET, "ifnet", "interface internals");
360 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address");
361 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address");
362
363 struct ifnet *
ifnet_byindex(u_int idx)364 ifnet_byindex(u_int idx)
365 {
366 struct ifnet *ifp;
367
368 NET_EPOCH_ASSERT();
369
370 if (__predict_false(idx > if_index))
371 return (NULL);
372
373 ifp = ck_pr_load_ptr(&ifindex_table[idx].ife_ifnet);
374
375 if (curvnet != NULL && ifp != NULL && ifp->if_vnet != curvnet)
376 ifp = NULL;
377
378 return (ifp);
379 }
380
381 struct ifnet *
ifnet_byindex_ref(u_int idx)382 ifnet_byindex_ref(u_int idx)
383 {
384 struct ifnet *ifp;
385
386 ifp = ifnet_byindex(idx);
387 if (ifp == NULL || (ifp->if_flags & IFF_DYING))
388 return (NULL);
389 if (!if_try_ref(ifp))
390 return (NULL);
391 return (ifp);
392 }
393
394 struct ifnet *
ifnet_byindexgen(uint16_t idx,uint16_t gen)395 ifnet_byindexgen(uint16_t idx, uint16_t gen)
396 {
397 struct ifnet *ifp;
398
399 NET_EPOCH_ASSERT();
400
401 if (__predict_false(idx > if_index))
402 return (NULL);
403
404 ifp = ck_pr_load_ptr(&ifindex_table[idx].ife_ifnet);
405
406 if (ifindex_table[idx].ife_gencnt == gen)
407 return (ifp);
408 else
409 return (NULL);
410 }
411
412 /*
413 * Network interface utility routines.
414 *
415 * Routines with ifa_ifwith* names take sockaddr *'s as
416 * parameters.
417 */
418
419 static void
if_init_idxtable(void * arg __unused)420 if_init_idxtable(void *arg __unused)
421 {
422
423 ifindex_table = malloc(if_indexlim * sizeof(*ifindex_table),
424 M_IFNET, M_WAITOK | M_ZERO);
425 }
426 SYSINIT(if_init, SI_SUB_INIT_IF, SI_ORDER_SECOND, if_init_idxtable, NULL);
427
428 static void
vnet_if_init(const void * unused __unused)429 vnet_if_init(const void *unused __unused)
430 {
431
432 CK_STAILQ_INIT(&V_ifnet);
433 CK_STAILQ_INIT(&V_ifg_head);
434 }
435 VNET_SYSINIT(vnet_if_init, SI_SUB_INIT_IF, SI_ORDER_SECOND, vnet_if_init,
436 NULL);
437
438 static void
if_link_ifnet(struct ifnet * ifp)439 if_link_ifnet(struct ifnet *ifp)
440 {
441
442 IFNET_WLOCK();
443 CK_STAILQ_INSERT_TAIL(&V_ifnet, ifp, if_link);
444 #ifdef VIMAGE
445 curvnet->vnet_ifcnt++;
446 #endif
447 IFNET_WUNLOCK();
448 }
449
450 static bool
if_unlink_ifnet(struct ifnet * ifp,bool vmove)451 if_unlink_ifnet(struct ifnet *ifp, bool vmove)
452 {
453 struct ifnet *iter;
454 int found = 0;
455
456 IFNET_WLOCK();
457 CK_STAILQ_FOREACH(iter, &V_ifnet, if_link)
458 if (iter == ifp) {
459 CK_STAILQ_REMOVE(&V_ifnet, ifp, ifnet, if_link);
460 if (!vmove)
461 ifp->if_flags |= IFF_DYING;
462 found = 1;
463 break;
464 }
465 #ifdef VIMAGE
466 curvnet->vnet_ifcnt--;
467 #endif
468 IFNET_WUNLOCK();
469
470 return (found);
471 }
472
473 #ifdef VIMAGE
474 static void
vnet_if_return(const void * unused __unused)475 vnet_if_return(const void *unused __unused)
476 {
477 struct ifnet *ifp, *nifp;
478 struct ifnet **pending;
479 int found __diagused;
480 int i;
481
482 i = 0;
483
484 /*
485 * We need to protect our access to the V_ifnet tailq. Ordinarily we'd
486 * enter NET_EPOCH, but that's not possible, because if_vmove() calls
487 * if_detach_internal(), which waits for NET_EPOCH callbacks to
488 * complete. We can't do that from within NET_EPOCH.
489 *
490 * However, we can also use the IFNET_xLOCK, which is the V_ifnet
491 * read/write lock. We cannot hold the lock as we call if_vmove()
492 * though, as that presents LOR w.r.t ifnet_sx, in_multi_sx and iflib
493 * ctx lock.
494 */
495 IFNET_WLOCK();
496
497 pending = malloc(sizeof(struct ifnet *) * curvnet->vnet_ifcnt,
498 M_IFNET, M_WAITOK | M_ZERO);
499
500 /* Return all inherited interfaces to their parent vnets. */
501 CK_STAILQ_FOREACH_SAFE(ifp, &V_ifnet, if_link, nifp) {
502 if (ifp->if_home_vnet != ifp->if_vnet) {
503 found = if_unlink_ifnet(ifp, true);
504 MPASS(found);
505
506 pending[i++] = ifp;
507 }
508 }
509 IFNET_WUNLOCK();
510
511 for (int j = 0; j < i; j++) {
512 sx_xlock(&ifnet_detach_sxlock);
513 if_vmove(pending[j], pending[j]->if_home_vnet);
514 sx_xunlock(&ifnet_detach_sxlock);
515 }
516
517 free(pending, M_IFNET);
518 }
519 VNET_SYSUNINIT(vnet_if_return, SI_SUB_VNET_DONE, SI_ORDER_ANY,
520 vnet_if_return, NULL);
521 #endif
522
523 /*
524 * Allocate a struct ifnet and an index for an interface. A layer 2
525 * common structure will also be allocated if an allocation routine is
526 * registered for the passed type.
527 */
528 static struct ifnet *
if_alloc_domain(u_char type,int numa_domain)529 if_alloc_domain(u_char type, int numa_domain)
530 {
531 struct ifnet *ifp;
532 u_short idx;
533
534 KASSERT(numa_domain <= IF_NODOM, ("numa_domain too large"));
535 if (numa_domain == IF_NODOM)
536 ifp = malloc(sizeof(struct ifnet), M_IFNET,
537 M_WAITOK | M_ZERO);
538 else
539 ifp = malloc_domainset(sizeof(struct ifnet), M_IFNET,
540 DOMAINSET_PREF(numa_domain), M_WAITOK | M_ZERO);
541 ifp->if_type = type;
542 ifp->if_alloctype = type;
543 ifp->if_numa_domain = numa_domain;
544 #ifdef VIMAGE
545 ifp->if_vnet = curvnet;
546 #endif
547 if (if_com_alloc[type] != NULL) {
548 ifp->if_l2com = if_com_alloc[type](type, ifp);
549 KASSERT(ifp->if_l2com, ("%s: if_com_alloc[%u] failed", __func__,
550 type));
551 }
552
553 IF_ADDR_LOCK_INIT(ifp);
554 TASK_INIT(&ifp->if_linktask, 0, do_link_state_change, ifp);
555 TASK_INIT(&ifp->if_addmultitask, 0, if_siocaddmulti, ifp);
556 ifp->if_afdata_initialized = 0;
557 IF_AFDATA_LOCK_INIT(ifp);
558 CK_STAILQ_INIT(&ifp->if_addrhead);
559 CK_STAILQ_INIT(&ifp->if_multiaddrs);
560 CK_STAILQ_INIT(&ifp->if_groups);
561 #ifdef MAC
562 mac_ifnet_init(ifp);
563 #endif
564 ifq_init(&ifp->if_snd, ifp);
565
566 refcount_init(&ifp->if_refcount, 1); /* Index reference. */
567 for (int i = 0; i < IFCOUNTERS; i++)
568 ifp->if_counters[i] = counter_u64_alloc(M_WAITOK);
569 ifp->if_get_counter = if_get_counter_default;
570 ifp->if_pcp = IFNET_PCP_NONE;
571
572 /* Allocate an ifindex array entry. */
573 IFNET_WLOCK();
574 /*
575 * Try to find an empty slot below if_index. If we fail, take the
576 * next slot.
577 */
578 for (idx = 1; idx <= if_index; idx++) {
579 if (ifindex_table[idx].ife_ifnet == NULL)
580 break;
581 }
582
583 /* Catch if_index overflow. */
584 if (idx >= if_indexlim) {
585 struct ifindex_entry *new, *old;
586 int newlim;
587
588 newlim = if_indexlim * 2;
589 new = malloc(newlim * sizeof(*new), M_IFNET, M_WAITOK | M_ZERO);
590 memcpy(new, ifindex_table, if_indexlim * sizeof(*new));
591 old = ifindex_table;
592 ck_pr_store_ptr(&ifindex_table, new);
593 if_indexlim = newlim;
594 NET_EPOCH_WAIT();
595 free(old, M_IFNET);
596 }
597 if (idx > if_index)
598 if_index = idx;
599
600 ifp->if_index = idx;
601 ifp->if_idxgen = ifindex_table[idx].ife_gencnt;
602 ck_pr_store_ptr(&ifindex_table[idx].ife_ifnet, ifp);
603 IFNET_WUNLOCK();
604
605 return (ifp);
606 }
607
608 struct ifnet *
if_alloc_dev(u_char type,device_t dev)609 if_alloc_dev(u_char type, device_t dev)
610 {
611 int numa_domain;
612
613 if (dev == NULL || bus_get_domain(dev, &numa_domain) != 0)
614 return (if_alloc_domain(type, IF_NODOM));
615 return (if_alloc_domain(type, numa_domain));
616 }
617
618 struct ifnet *
if_alloc(u_char type)619 if_alloc(u_char type)
620 {
621
622 return (if_alloc_domain(type, IF_NODOM));
623 }
624 /*
625 * Do the actual work of freeing a struct ifnet, and layer 2 common
626 * structure. This call is made when the network epoch guarantees
627 * us that nobody holds a pointer to the interface.
628 */
629 static void
if_free_deferred(epoch_context_t ctx)630 if_free_deferred(epoch_context_t ctx)
631 {
632 struct ifnet *ifp = __containerof(ctx, struct ifnet, if_epoch_ctx);
633
634 KASSERT((ifp->if_flags & IFF_DYING),
635 ("%s: interface not dying", __func__));
636
637 if (if_com_free[ifp->if_alloctype] != NULL)
638 if_com_free[ifp->if_alloctype](ifp->if_l2com,
639 ifp->if_alloctype);
640
641 #ifdef MAC
642 mac_ifnet_destroy(ifp);
643 #endif /* MAC */
644 IF_AFDATA_DESTROY(ifp);
645 IF_ADDR_LOCK_DESTROY(ifp);
646 ifq_delete(&ifp->if_snd);
647
648 for (int i = 0; i < IFCOUNTERS; i++)
649 counter_u64_free(ifp->if_counters[i]);
650
651 if_freedescr(ifp->if_description);
652 free(ifp->if_hw_addr, M_IFADDR);
653 free(ifp, M_IFNET);
654 }
655
656 /*
657 * Deregister an interface and free the associated storage.
658 */
659 void
if_free(struct ifnet * ifp)660 if_free(struct ifnet *ifp)
661 {
662
663 ifp->if_flags |= IFF_DYING; /* XXX: Locking */
664
665 /*
666 * XXXGL: An interface index is really an alias to ifp pointer.
667 * Why would we clear the alias now, and not in the deferred
668 * context? Indeed there is nothing wrong with some network
669 * thread obtaining ifp via ifnet_byindex() inside the network
670 * epoch and then dereferencing ifp while we perform if_free(),
671 * and after if_free() finished, too.
672 *
673 * This early index freeing was important back when ifindex was
674 * virtualized and interface would outlive the vnet.
675 */
676 IFNET_WLOCK();
677 MPASS(ifindex_table[ifp->if_index].ife_ifnet == ifp);
678 ck_pr_store_ptr(&ifindex_table[ifp->if_index].ife_ifnet, NULL);
679 ifindex_table[ifp->if_index].ife_gencnt++;
680 while (if_index > 0 && ifindex_table[if_index].ife_ifnet == NULL)
681 if_index--;
682 IFNET_WUNLOCK();
683
684 if (refcount_release(&ifp->if_refcount))
685 NET_EPOCH_CALL(if_free_deferred, &ifp->if_epoch_ctx);
686 }
687
688 /*
689 * Interfaces to keep an ifnet type-stable despite the possibility of the
690 * driver calling if_free(). If there are additional references, we defer
691 * freeing the underlying data structure.
692 */
693 void
if_ref(struct ifnet * ifp)694 if_ref(struct ifnet *ifp)
695 {
696 u_int old __diagused;
697
698 /* We don't assert the ifnet list lock here, but arguably should. */
699 old = refcount_acquire(&ifp->if_refcount);
700 KASSERT(old > 0, ("%s: ifp %p has 0 refs", __func__, ifp));
701 }
702
703 bool
if_try_ref(struct ifnet * ifp)704 if_try_ref(struct ifnet *ifp)
705 {
706 NET_EPOCH_ASSERT();
707 return (refcount_acquire_if_not_zero(&ifp->if_refcount));
708 }
709
710 void
if_rele(struct ifnet * ifp)711 if_rele(struct ifnet *ifp)
712 {
713
714 if (!refcount_release(&ifp->if_refcount))
715 return;
716 NET_EPOCH_CALL(if_free_deferred, &ifp->if_epoch_ctx);
717 }
718
719 void
ifq_init(struct ifaltq * ifq,struct ifnet * ifp)720 ifq_init(struct ifaltq *ifq, struct ifnet *ifp)
721 {
722
723 mtx_init(&ifq->ifq_mtx, ifp->if_xname, "if send queue", MTX_DEF);
724
725 if (ifq->ifq_maxlen == 0)
726 ifq->ifq_maxlen = ifqmaxlen;
727
728 ifq->altq_type = 0;
729 ifq->altq_disc = NULL;
730 ifq->altq_flags &= ALTQF_CANTCHANGE;
731 ifq->altq_tbr = NULL;
732 ifq->altq_ifp = ifp;
733 }
734
735 void
ifq_delete(struct ifaltq * ifq)736 ifq_delete(struct ifaltq *ifq)
737 {
738 mtx_destroy(&ifq->ifq_mtx);
739 }
740
741 /*
742 * Perform generic interface initialization tasks and attach the interface
743 * to the list of "active" interfaces. If vmove flag is set on entry
744 * to if_attach_internal(), perform only a limited subset of initialization
745 * tasks, given that we are moving from one vnet to another an ifnet which
746 * has already been fully initialized.
747 *
748 * Note that if_detach_internal() removes group membership unconditionally
749 * even when vmove flag is set, and if_attach_internal() adds only IFG_ALL.
750 * Thus, when if_vmove() is applied to a cloned interface, group membership
751 * is lost while a cloned one always joins a group whose name is
752 * ifc->ifc_name. To recover this after if_detach_internal() and
753 * if_attach_internal(), the cloner should be specified to
754 * if_attach_internal() via ifc. If it is non-NULL, if_attach_internal()
755 * attempts to join a group whose name is ifc->ifc_name.
756 *
757 * XXX:
758 * - The decision to return void and thus require this function to
759 * succeed is questionable.
760 * - We should probably do more sanity checking. For instance we don't
761 * do anything to insure if_xname is unique or non-empty.
762 */
763 void
if_attach(struct ifnet * ifp)764 if_attach(struct ifnet *ifp)
765 {
766
767 if_attach_internal(ifp, false);
768 }
769
770 /*
771 * Compute the least common TSO limit.
772 */
773 void
if_hw_tsomax_common(if_t ifp,struct ifnet_hw_tsomax * pmax)774 if_hw_tsomax_common(if_t ifp, struct ifnet_hw_tsomax *pmax)
775 {
776 /*
777 * 1) If there is no limit currently, take the limit from
778 * the network adapter.
779 *
780 * 2) If the network adapter has a limit below the current
781 * limit, apply it.
782 */
783 if (pmax->tsomaxbytes == 0 || (ifp->if_hw_tsomax != 0 &&
784 ifp->if_hw_tsomax < pmax->tsomaxbytes)) {
785 pmax->tsomaxbytes = ifp->if_hw_tsomax;
786 }
787 if (pmax->tsomaxsegcount == 0 || (ifp->if_hw_tsomaxsegcount != 0 &&
788 ifp->if_hw_tsomaxsegcount < pmax->tsomaxsegcount)) {
789 pmax->tsomaxsegcount = ifp->if_hw_tsomaxsegcount;
790 }
791 if (pmax->tsomaxsegsize == 0 || (ifp->if_hw_tsomaxsegsize != 0 &&
792 ifp->if_hw_tsomaxsegsize < pmax->tsomaxsegsize)) {
793 pmax->tsomaxsegsize = ifp->if_hw_tsomaxsegsize;
794 }
795 }
796
797 /*
798 * Update TSO limit of a network adapter.
799 *
800 * Returns zero if no change. Else non-zero.
801 */
802 int
if_hw_tsomax_update(if_t ifp,struct ifnet_hw_tsomax * pmax)803 if_hw_tsomax_update(if_t ifp, struct ifnet_hw_tsomax *pmax)
804 {
805 int retval = 0;
806 if (ifp->if_hw_tsomax != pmax->tsomaxbytes) {
807 ifp->if_hw_tsomax = pmax->tsomaxbytes;
808 retval++;
809 }
810 if (ifp->if_hw_tsomaxsegsize != pmax->tsomaxsegsize) {
811 ifp->if_hw_tsomaxsegsize = pmax->tsomaxsegsize;
812 retval++;
813 }
814 if (ifp->if_hw_tsomaxsegcount != pmax->tsomaxsegcount) {
815 ifp->if_hw_tsomaxsegcount = pmax->tsomaxsegcount;
816 retval++;
817 }
818 return (retval);
819 }
820
821 static void
if_attach_internal(struct ifnet * ifp,bool vmove)822 if_attach_internal(struct ifnet *ifp, bool vmove)
823 {
824 unsigned socksize, ifasize;
825 int namelen, masklen;
826 struct sockaddr_dl *sdl;
827 struct ifaddr *ifa;
828
829 MPASS(ifindex_table[ifp->if_index].ife_ifnet == ifp);
830
831 #ifdef VIMAGE
832 CURVNET_ASSERT_SET();
833 ifp->if_vnet = curvnet;
834 if (ifp->if_home_vnet == NULL)
835 ifp->if_home_vnet = curvnet;
836 #endif
837
838 if_addgroup(ifp, IFG_ALL);
839
840 #ifdef VIMAGE
841 /* Restore group membership for cloned interface. */
842 if (vmove)
843 if_clone_restoregroup(ifp);
844 #endif
845
846 getmicrotime(&ifp->if_lastchange);
847 ifp->if_epoch = time_uptime;
848
849 KASSERT((ifp->if_transmit == NULL && ifp->if_qflush == NULL) ||
850 (ifp->if_transmit != NULL && ifp->if_qflush != NULL),
851 ("transmit and qflush must both either be set or both be NULL"));
852 if (ifp->if_transmit == NULL) {
853 ifp->if_transmit = if_transmit_default;
854 ifp->if_qflush = if_qflush;
855 }
856 if (ifp->if_input == NULL)
857 ifp->if_input = if_input_default;
858
859 if (ifp->if_requestencap == NULL)
860 ifp->if_requestencap = if_requestencap_default;
861
862 if (!vmove) {
863 #ifdef MAC
864 mac_ifnet_create(ifp);
865 #endif
866
867 /*
868 * Create a Link Level name for this device.
869 */
870 namelen = strlen(ifp->if_xname);
871 /*
872 * Always save enough space for any possible name so we
873 * can do a rename in place later.
874 */
875 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + IFNAMSIZ;
876 socksize = masklen + ifp->if_addrlen;
877 if (socksize < sizeof(*sdl))
878 socksize = sizeof(*sdl);
879 socksize = roundup2(socksize, sizeof(long));
880 ifasize = sizeof(*ifa) + 2 * socksize;
881 ifa = ifa_alloc(ifasize, M_WAITOK);
882 sdl = (struct sockaddr_dl *)(ifa + 1);
883 sdl->sdl_len = socksize;
884 sdl->sdl_family = AF_LINK;
885 bcopy(ifp->if_xname, sdl->sdl_data, namelen);
886 sdl->sdl_nlen = namelen;
887 sdl->sdl_index = ifp->if_index;
888 sdl->sdl_type = ifp->if_type;
889 ifp->if_addr = ifa;
890 ifa->ifa_ifp = ifp;
891 ifa->ifa_addr = (struct sockaddr *)sdl;
892 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
893 ifa->ifa_netmask = (struct sockaddr *)sdl;
894 sdl->sdl_len = masklen;
895 while (namelen != 0)
896 sdl->sdl_data[--namelen] = 0xff;
897 CK_STAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link);
898 /* Reliably crash if used uninitialized. */
899 ifp->if_broadcastaddr = NULL;
900
901 if (ifp->if_type == IFT_ETHER) {
902 ifp->if_hw_addr = malloc(ifp->if_addrlen, M_IFADDR,
903 M_WAITOK | M_ZERO);
904 }
905
906 #if defined(INET) || defined(INET6)
907 /* Use defaults for TSO, if nothing is set */
908 if (ifp->if_hw_tsomax == 0 &&
909 ifp->if_hw_tsomaxsegcount == 0 &&
910 ifp->if_hw_tsomaxsegsize == 0) {
911 /*
912 * The TSO defaults needs to be such that an
913 * NFS mbuf list of 35 mbufs totalling just
914 * below 64K works and that a chain of mbufs
915 * can be defragged into at most 32 segments:
916 */
917 ifp->if_hw_tsomax = min(IP_MAXPACKET, (32 * MCLBYTES) -
918 (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN));
919 ifp->if_hw_tsomaxsegcount = 35;
920 ifp->if_hw_tsomaxsegsize = 2048; /* 2K */
921
922 /* XXX some drivers set IFCAP_TSO after ethernet attach */
923 if (ifp->if_capabilities & IFCAP_TSO) {
924 if_printf(ifp, "Using defaults for TSO: %u/%u/%u\n",
925 ifp->if_hw_tsomax,
926 ifp->if_hw_tsomaxsegcount,
927 ifp->if_hw_tsomaxsegsize);
928 }
929 }
930 #endif
931 }
932
933 if (domain_init_status >= 2)
934 if_attachdomain1(ifp);
935
936 if_link_ifnet(ifp);
937
938 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
939 if (IS_DEFAULT_VNET(curvnet))
940 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL);
941 }
942
943 static void
if_epochalloc(void * dummy __unused)944 if_epochalloc(void *dummy __unused)
945 {
946
947 net_epoch_preempt = epoch_alloc("Net preemptible", EPOCH_PREEMPT);
948 }
949 SYSINIT(ifepochalloc, SI_SUB_EPOCH, SI_ORDER_ANY, if_epochalloc, NULL);
950
951 static void
if_attachdomain(void * dummy)952 if_attachdomain(void *dummy)
953 {
954 struct ifnet *ifp;
955
956 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link)
957 if_attachdomain1(ifp);
958 }
959 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_SECOND,
960 if_attachdomain, NULL);
961
962 static void
if_attachdomain1(struct ifnet * ifp)963 if_attachdomain1(struct ifnet *ifp)
964 {
965 struct domain *dp;
966
967 /*
968 * Since dp->dom_ifattach calls malloc() with M_WAITOK, we
969 * cannot lock ifp->if_afdata initialization, entirely.
970 */
971 IF_AFDATA_LOCK(ifp);
972 if (ifp->if_afdata_initialized >= domain_init_status) {
973 IF_AFDATA_UNLOCK(ifp);
974 log(LOG_WARNING, "%s called more than once on %s\n",
975 __func__, ifp->if_xname);
976 return;
977 }
978 ifp->if_afdata_initialized = domain_init_status;
979 IF_AFDATA_UNLOCK(ifp);
980
981 /* address family dependent data region */
982 bzero(ifp->if_afdata, sizeof(ifp->if_afdata));
983 SLIST_FOREACH(dp, &domains, dom_next) {
984 if (dp->dom_ifattach)
985 ifp->if_afdata[dp->dom_family] =
986 (*dp->dom_ifattach)(ifp);
987 }
988 }
989
990 /*
991 * Remove any unicast or broadcast network addresses from an interface.
992 */
993 void
if_purgeaddrs(struct ifnet * ifp)994 if_purgeaddrs(struct ifnet *ifp)
995 {
996 struct ifaddr *ifa;
997
998 #ifdef INET6
999 /*
1000 * Need to leave multicast addresses of proxy NDP llentries
1001 * before in6_purgeifaddr() because the llentries are keys
1002 * for in6_multi objects of proxy NDP entries.
1003 * in6_purgeifaddr()s clean up llentries including proxy NDPs
1004 * then we would lose the keys if they are called earlier.
1005 */
1006 in6_purge_proxy_ndp(ifp);
1007 #endif
1008 while (1) {
1009 struct epoch_tracker et;
1010
1011 NET_EPOCH_ENTER(et);
1012 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1013 if (ifa->ifa_addr->sa_family != AF_LINK)
1014 break;
1015 }
1016 NET_EPOCH_EXIT(et);
1017
1018 if (ifa == NULL)
1019 break;
1020 #ifdef INET
1021 /* XXX: Ugly!! ad hoc just for INET */
1022 if (ifa->ifa_addr->sa_family == AF_INET) {
1023 struct ifreq ifr;
1024
1025 bzero(&ifr, sizeof(ifr));
1026 ifr.ifr_addr = *ifa->ifa_addr;
1027 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp,
1028 NULL) == 0)
1029 continue;
1030 }
1031 #endif /* INET */
1032 #ifdef INET6
1033 if (ifa->ifa_addr->sa_family == AF_INET6) {
1034 in6_purgeifaddr((struct in6_ifaddr *)ifa);
1035 /* ifp_addrhead is already updated */
1036 continue;
1037 }
1038 #endif /* INET6 */
1039 IF_ADDR_WLOCK(ifp);
1040 CK_STAILQ_REMOVE(&ifp->if_addrhead, ifa, ifaddr, ifa_link);
1041 IF_ADDR_WUNLOCK(ifp);
1042 ifa_free(ifa);
1043 }
1044 }
1045
1046 /*
1047 * Remove any multicast network addresses from an interface when an ifnet
1048 * is going away.
1049 */
1050 static void
if_purgemaddrs(struct ifnet * ifp)1051 if_purgemaddrs(struct ifnet *ifp)
1052 {
1053 struct ifmultiaddr *ifma;
1054
1055 IF_ADDR_WLOCK(ifp);
1056 while (!CK_STAILQ_EMPTY(&ifp->if_multiaddrs)) {
1057 ifma = CK_STAILQ_FIRST(&ifp->if_multiaddrs);
1058 CK_STAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifmultiaddr, ifma_link);
1059 if_delmulti_locked(ifp, ifma, 1);
1060 }
1061 IF_ADDR_WUNLOCK(ifp);
1062 }
1063
1064 /*
1065 * Detach an interface, removing it from the list of "active" interfaces.
1066 * If vmove flag is set on entry to if_detach_internal(), perform only a
1067 * limited subset of cleanup tasks, given that we are moving an ifnet from
1068 * one vnet to another, where it must be fully operational.
1069 *
1070 * XXXRW: There are some significant questions about event ordering, and
1071 * how to prevent things from starting to use the interface during detach.
1072 */
1073 void
if_detach(struct ifnet * ifp)1074 if_detach(struct ifnet *ifp)
1075 {
1076 bool found;
1077
1078 CURVNET_SET_QUIET(ifp->if_vnet);
1079 found = if_unlink_ifnet(ifp, false);
1080 if (found) {
1081 sx_xlock(&ifnet_detach_sxlock);
1082 if_detach_internal(ifp, false);
1083 sx_xunlock(&ifnet_detach_sxlock);
1084 }
1085 CURVNET_RESTORE();
1086 }
1087
1088 /*
1089 * The vmove flag, if set, indicates that we are called from a callpath
1090 * that is moving an interface to a different vnet instance.
1091 *
1092 * The shutdown flag, if set, indicates that we are called in the
1093 * process of shutting down a vnet instance. Currently only the
1094 * vnet_if_return SYSUNINIT function sets it. Note: we can be called
1095 * on a vnet instance shutdown without this flag being set, e.g., when
1096 * the cloned interfaces are destoyed as first thing of teardown.
1097 */
1098 static void
if_detach_internal(struct ifnet * ifp,bool vmove)1099 if_detach_internal(struct ifnet *ifp, bool vmove)
1100 {
1101 struct ifaddr *ifa;
1102 int i;
1103 struct domain *dp;
1104 void *if_afdata[AF_MAX];
1105 #ifdef VIMAGE
1106 bool shutdown;
1107
1108 shutdown = VNET_IS_SHUTTING_DOWN(ifp->if_vnet);
1109 #endif
1110
1111 sx_assert(&ifnet_detach_sxlock, SX_XLOCKED);
1112
1113 /*
1114 * At this point we know the interface still was on the ifnet list
1115 * and we removed it so we are in a stable state.
1116 */
1117 NET_EPOCH_WAIT();
1118
1119 /*
1120 * Ensure all pending EPOCH(9) callbacks have been executed. This
1121 * fixes issues about late destruction of multicast options
1122 * which lead to leave group calls, which in turn access the
1123 * belonging ifnet structure:
1124 */
1125 NET_EPOCH_DRAIN_CALLBACKS();
1126
1127 /*
1128 * In any case (destroy or vmove) detach us from the groups
1129 * and remove/wait for pending events on the taskq.
1130 * XXX-BZ in theory an interface could still enqueue a taskq change?
1131 */
1132 if_delgroups(ifp);
1133
1134 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
1135 taskqueue_drain(taskqueue_swi, &ifp->if_addmultitask);
1136
1137 if_down(ifp);
1138
1139 #ifdef VIMAGE
1140 /*
1141 * On VNET shutdown abort here as the stack teardown will do all
1142 * the work top-down for us.
1143 */
1144 if (shutdown) {
1145 /* Give interface users the chance to clean up. */
1146 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
1147
1148 /*
1149 * In case of a vmove we are done here without error.
1150 * If we would signal an error it would lead to the same
1151 * abort as if we did not find the ifnet anymore.
1152 * if_detach() calls us in void context and does not care
1153 * about an early abort notification, so life is splendid :)
1154 */
1155 goto finish_vnet_shutdown;
1156 }
1157 #endif
1158
1159 /*
1160 * At this point we are not tearing down a VNET and are either
1161 * going to destroy or vmove the interface and have to cleanup
1162 * accordingly.
1163 */
1164
1165 /*
1166 * Remove routes and flush queues.
1167 */
1168 #ifdef ALTQ
1169 if (ALTQ_IS_ENABLED(&ifp->if_snd))
1170 altq_disable(&ifp->if_snd);
1171 if (ALTQ_IS_ATTACHED(&ifp->if_snd))
1172 altq_detach(&ifp->if_snd);
1173 #endif
1174
1175 if_purgeaddrs(ifp);
1176
1177 #ifdef INET
1178 in_ifdetach(ifp);
1179 #endif
1180
1181 #ifdef INET6
1182 /*
1183 * Remove all IPv6 kernel structs related to ifp. This should be done
1184 * before removing routing entries below, since IPv6 interface direct
1185 * routes are expected to be removed by the IPv6-specific kernel API.
1186 * Otherwise, the kernel will detect some inconsistency and bark it.
1187 */
1188 in6_ifdetach(ifp);
1189 #endif
1190 if_purgemaddrs(ifp);
1191
1192 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
1193 if (IS_DEFAULT_VNET(curvnet))
1194 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL);
1195
1196 if (!vmove) {
1197 /*
1198 * Prevent further calls into the device driver via ifnet.
1199 */
1200 if_dead(ifp);
1201
1202 /*
1203 * Clean up all addresses.
1204 */
1205 IF_ADDR_WLOCK(ifp);
1206 if (!CK_STAILQ_EMPTY(&ifp->if_addrhead)) {
1207 ifa = CK_STAILQ_FIRST(&ifp->if_addrhead);
1208 CK_STAILQ_REMOVE(&ifp->if_addrhead, ifa, ifaddr, ifa_link);
1209 IF_ADDR_WUNLOCK(ifp);
1210 ifa_free(ifa);
1211 } else
1212 IF_ADDR_WUNLOCK(ifp);
1213 }
1214
1215 rt_flushifroutes(ifp);
1216
1217 #ifdef VIMAGE
1218 finish_vnet_shutdown:
1219 #endif
1220 /*
1221 * We cannot hold the lock over dom_ifdetach calls as they might
1222 * sleep, for example trying to drain a callout, thus open up the
1223 * theoretical race with re-attaching.
1224 */
1225 IF_AFDATA_LOCK(ifp);
1226 i = ifp->if_afdata_initialized;
1227 ifp->if_afdata_initialized = 0;
1228 if (i != 0) {
1229 /*
1230 * Defer the dom_ifdetach call.
1231 */
1232 _Static_assert(sizeof(if_afdata) == sizeof(ifp->if_afdata),
1233 "array size mismatch");
1234 memcpy(if_afdata, ifp->if_afdata, sizeof(if_afdata));
1235 memset(ifp->if_afdata, 0, sizeof(ifp->if_afdata));
1236 }
1237 IF_AFDATA_UNLOCK(ifp);
1238 if (i == 0)
1239 return;
1240 /*
1241 * XXXZL: This net epoch wait is not necessary if we have done right.
1242 * But if we do not, at least we can make a guarantee that threads those
1243 * enter net epoch will see NULL address family dependent data,
1244 * e.g. if_afdata[AF_INET6]. A clear NULL pointer derefence is much
1245 * better than writing to freed memory.
1246 */
1247 NET_EPOCH_WAIT();
1248 SLIST_FOREACH(dp, &domains, dom_next) {
1249 if (dp->dom_ifdetach != NULL &&
1250 if_afdata[dp->dom_family] != NULL)
1251 (*dp->dom_ifdetach)(ifp, if_afdata[dp->dom_family]);
1252 }
1253 }
1254
1255 #ifdef VIMAGE
1256 /*
1257 * if_vmove() performs a limited version of if_detach() in current
1258 * vnet and if_attach()es the ifnet to the vnet specified as 2nd arg.
1259 */
1260 static void
if_vmove(struct ifnet * ifp,struct vnet * new_vnet)1261 if_vmove(struct ifnet *ifp, struct vnet *new_vnet)
1262 {
1263 #ifdef DEV_BPF
1264 /*
1265 * Detach BPF file descriptors from its interface.
1266 */
1267 bpf_ifdetach(ifp);
1268 #endif
1269
1270 /*
1271 * Detach from current vnet, but preserve LLADDR info, do not
1272 * mark as dead etc. so that the ifnet can be reattached later.
1273 */
1274 if_detach_internal(ifp, true);
1275
1276 /*
1277 * Perform interface-specific reassignment tasks, if provided by
1278 * the driver.
1279 */
1280 if (ifp->if_reassign != NULL)
1281 ifp->if_reassign(ifp, new_vnet, NULL);
1282
1283 /*
1284 * Switch to the context of the target vnet.
1285 */
1286 CURVNET_SET_QUIET(new_vnet);
1287 if_attach_internal(ifp, true);
1288 CURVNET_RESTORE();
1289 }
1290
1291 /*
1292 * Move an ifnet to or from another child prison/vnet, specified by the jail id.
1293 */
1294 static int
if_vmove_loan(struct thread * td,struct ifnet * ifp,char * ifname,int jid)1295 if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid)
1296 {
1297 struct prison *pr;
1298 struct ifnet *difp;
1299 bool found;
1300 bool shutdown;
1301
1302 MPASS(ifindex_table[ifp->if_index].ife_ifnet == ifp);
1303
1304 /* Try to find the prison within our visibility. */
1305 sx_slock(&allprison_lock);
1306 pr = prison_find_child(td->td_ucred->cr_prison, jid);
1307 sx_sunlock(&allprison_lock);
1308 if (pr == NULL)
1309 return (ENXIO);
1310 prison_hold_locked(pr);
1311 mtx_unlock(&pr->pr_mtx);
1312
1313 /* Do not try to move the iface from and to the same prison. */
1314 if (pr->pr_vnet == ifp->if_vnet) {
1315 prison_free(pr);
1316 return (EEXIST);
1317 }
1318
1319 /* Make sure the named iface does not exists in the dst. prison/vnet. */
1320 /* XXX Lock interfaces to avoid races. */
1321 CURVNET_SET_QUIET(pr->pr_vnet);
1322 difp = ifunit(ifname);
1323 CURVNET_RESTORE();
1324 if (difp != NULL) {
1325 prison_free(pr);
1326 return (EEXIST);
1327 }
1328 sx_xlock(&ifnet_detach_sxlock);
1329
1330 /* Make sure the VNET is stable. */
1331 shutdown = VNET_IS_SHUTTING_DOWN(ifp->if_vnet);
1332 if (shutdown) {
1333 sx_xunlock(&ifnet_detach_sxlock);
1334 prison_free(pr);
1335 return (EBUSY);
1336 }
1337
1338 found = if_unlink_ifnet(ifp, true);
1339 if (! found) {
1340 sx_xunlock(&ifnet_detach_sxlock);
1341 prison_free(pr);
1342 return (ENODEV);
1343 }
1344
1345 /* Move the interface into the child jail/vnet. */
1346 if_vmove(ifp, pr->pr_vnet);
1347
1348 /* Report the new if_xname back to the userland. */
1349 sprintf(ifname, "%s", ifp->if_xname);
1350
1351 sx_xunlock(&ifnet_detach_sxlock);
1352
1353 prison_free(pr);
1354 return (0);
1355 }
1356
1357 static int
if_vmove_reclaim(struct thread * td,char * ifname,int jid)1358 if_vmove_reclaim(struct thread *td, char *ifname, int jid)
1359 {
1360 struct prison *pr;
1361 struct vnet *vnet_dst;
1362 struct ifnet *ifp;
1363 int found __diagused;
1364 bool shutdown;
1365
1366 /* Try to find the prison within our visibility. */
1367 sx_slock(&allprison_lock);
1368 pr = prison_find_child(td->td_ucred->cr_prison, jid);
1369 sx_sunlock(&allprison_lock);
1370 if (pr == NULL)
1371 return (ENXIO);
1372 prison_hold_locked(pr);
1373 mtx_unlock(&pr->pr_mtx);
1374
1375 /* Make sure the named iface exists in the source prison/vnet. */
1376 CURVNET_SET(pr->pr_vnet);
1377 ifp = ifunit(ifname); /* XXX Lock to avoid races. */
1378 if (ifp == NULL) {
1379 CURVNET_RESTORE();
1380 prison_free(pr);
1381 return (ENXIO);
1382 }
1383
1384 /* Do not try to move the iface from and to the same prison. */
1385 vnet_dst = TD_TO_VNET(td);
1386 if (vnet_dst == ifp->if_vnet) {
1387 CURVNET_RESTORE();
1388 prison_free(pr);
1389 return (EEXIST);
1390 }
1391
1392 /* Make sure the VNET is stable. */
1393 shutdown = VNET_IS_SHUTTING_DOWN(ifp->if_vnet);
1394 if (shutdown) {
1395 CURVNET_RESTORE();
1396 prison_free(pr);
1397 return (EBUSY);
1398 }
1399
1400 /* Get interface back from child jail/vnet. */
1401 found = if_unlink_ifnet(ifp, true);
1402 MPASS(found);
1403 sx_xlock(&ifnet_detach_sxlock);
1404 if_vmove(ifp, vnet_dst);
1405 sx_xunlock(&ifnet_detach_sxlock);
1406 CURVNET_RESTORE();
1407
1408 /* Report the new if_xname back to the userland. */
1409 sprintf(ifname, "%s", ifp->if_xname);
1410
1411 prison_free(pr);
1412 return (0);
1413 }
1414 #endif /* VIMAGE */
1415
1416 /*
1417 * Add a group to an interface
1418 */
1419 int
if_addgroup(struct ifnet * ifp,const char * groupname)1420 if_addgroup(struct ifnet *ifp, const char *groupname)
1421 {
1422 struct ifg_list *ifgl;
1423 struct ifg_group *ifg = NULL;
1424 struct ifg_member *ifgm;
1425 int new = 0;
1426
1427 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' &&
1428 groupname[strlen(groupname) - 1] <= '9')
1429 return (EINVAL);
1430
1431 IFNET_WLOCK();
1432 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1433 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) {
1434 IFNET_WUNLOCK();
1435 return (EEXIST);
1436 }
1437
1438 if ((ifgl = malloc(sizeof(*ifgl), M_TEMP, M_NOWAIT)) == NULL) {
1439 IFNET_WUNLOCK();
1440 return (ENOMEM);
1441 }
1442
1443 if ((ifgm = malloc(sizeof(*ifgm), M_TEMP, M_NOWAIT)) == NULL) {
1444 free(ifgl, M_TEMP);
1445 IFNET_WUNLOCK();
1446 return (ENOMEM);
1447 }
1448
1449 CK_STAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
1450 if (!strcmp(ifg->ifg_group, groupname))
1451 break;
1452
1453 if (ifg == NULL) {
1454 if ((ifg = malloc(sizeof(*ifg), M_TEMP, M_NOWAIT)) == NULL) {
1455 free(ifgl, M_TEMP);
1456 free(ifgm, M_TEMP);
1457 IFNET_WUNLOCK();
1458 return (ENOMEM);
1459 }
1460 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group));
1461 ifg->ifg_refcnt = 0;
1462 CK_STAILQ_INIT(&ifg->ifg_members);
1463 CK_STAILQ_INSERT_TAIL(&V_ifg_head, ifg, ifg_next);
1464 new = 1;
1465 }
1466
1467 ifg->ifg_refcnt++;
1468 ifgl->ifgl_group = ifg;
1469 ifgm->ifgm_ifp = ifp;
1470
1471 IF_ADDR_WLOCK(ifp);
1472 CK_STAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next);
1473 CK_STAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next);
1474 IF_ADDR_WUNLOCK(ifp);
1475
1476 IFNET_WUNLOCK();
1477
1478 if (new)
1479 EVENTHANDLER_INVOKE(group_attach_event, ifg);
1480 EVENTHANDLER_INVOKE(group_change_event, groupname);
1481
1482 return (0);
1483 }
1484
1485 /*
1486 * Helper function to remove a group out of an interface. Expects the global
1487 * ifnet lock to be write-locked, and drops it before returning.
1488 */
1489 static void
_if_delgroup_locked(struct ifnet * ifp,struct ifg_list * ifgl,const char * groupname)1490 _if_delgroup_locked(struct ifnet *ifp, struct ifg_list *ifgl,
1491 const char *groupname)
1492 {
1493 struct ifg_member *ifgm;
1494 bool freeifgl;
1495
1496 IFNET_WLOCK_ASSERT();
1497
1498 IF_ADDR_WLOCK(ifp);
1499 CK_STAILQ_REMOVE(&ifp->if_groups, ifgl, ifg_list, ifgl_next);
1500 IF_ADDR_WUNLOCK(ifp);
1501
1502 CK_STAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) {
1503 if (ifgm->ifgm_ifp == ifp) {
1504 CK_STAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm,
1505 ifg_member, ifgm_next);
1506 break;
1507 }
1508 }
1509
1510 if (--ifgl->ifgl_group->ifg_refcnt == 0) {
1511 CK_STAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_group,
1512 ifg_next);
1513 freeifgl = true;
1514 } else {
1515 freeifgl = false;
1516 }
1517 IFNET_WUNLOCK();
1518
1519 NET_EPOCH_WAIT();
1520 EVENTHANDLER_INVOKE(group_change_event, groupname);
1521 if (freeifgl) {
1522 EVENTHANDLER_INVOKE(group_detach_event, ifgl->ifgl_group);
1523 free(ifgl->ifgl_group, M_TEMP);
1524 }
1525 free(ifgm, M_TEMP);
1526 free(ifgl, M_TEMP);
1527 }
1528
1529 /*
1530 * Remove a group from an interface
1531 */
1532 int
if_delgroup(struct ifnet * ifp,const char * groupname)1533 if_delgroup(struct ifnet *ifp, const char *groupname)
1534 {
1535 struct ifg_list *ifgl;
1536
1537 IFNET_WLOCK();
1538 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1539 if (strcmp(ifgl->ifgl_group->ifg_group, groupname) == 0)
1540 break;
1541 if (ifgl == NULL) {
1542 IFNET_WUNLOCK();
1543 return (ENOENT);
1544 }
1545
1546 _if_delgroup_locked(ifp, ifgl, groupname);
1547
1548 return (0);
1549 }
1550
1551 /*
1552 * Remove an interface from all groups
1553 */
1554 static void
if_delgroups(struct ifnet * ifp)1555 if_delgroups(struct ifnet *ifp)
1556 {
1557 struct ifg_list *ifgl;
1558 char groupname[IFNAMSIZ];
1559
1560 IFNET_WLOCK();
1561 while ((ifgl = CK_STAILQ_FIRST(&ifp->if_groups)) != NULL) {
1562 strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ);
1563 _if_delgroup_locked(ifp, ifgl, groupname);
1564 IFNET_WLOCK();
1565 }
1566 IFNET_WUNLOCK();
1567 }
1568
1569 /*
1570 * Stores all groups from an interface in memory pointed to by ifgr.
1571 */
1572 static int
if_getgroup(struct ifgroupreq * ifgr,struct ifnet * ifp)1573 if_getgroup(struct ifgroupreq *ifgr, struct ifnet *ifp)
1574 {
1575 int len, error;
1576 struct ifg_list *ifgl;
1577 struct ifg_req ifgrq, *ifgp;
1578
1579 NET_EPOCH_ASSERT();
1580
1581 if (ifgr->ifgr_len == 0) {
1582 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1583 ifgr->ifgr_len += sizeof(struct ifg_req);
1584 return (0);
1585 }
1586
1587 len = ifgr->ifgr_len;
1588 ifgp = ifgr->ifgr_groups;
1589 /* XXX: wire */
1590 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) {
1591 if (len < sizeof(ifgrq))
1592 return (EINVAL);
1593 bzero(&ifgrq, sizeof ifgrq);
1594 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group,
1595 sizeof(ifgrq.ifgrq_group));
1596 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req))))
1597 return (error);
1598 len -= sizeof(ifgrq);
1599 ifgp++;
1600 }
1601
1602 return (0);
1603 }
1604
1605 /*
1606 * Stores all members of a group in memory pointed to by igfr
1607 */
1608 static int
if_getgroupmembers(struct ifgroupreq * ifgr)1609 if_getgroupmembers(struct ifgroupreq *ifgr)
1610 {
1611 struct ifg_group *ifg;
1612 struct ifg_member *ifgm;
1613 struct ifg_req ifgrq, *ifgp;
1614 int len, error;
1615
1616 IFNET_RLOCK();
1617 CK_STAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
1618 if (strcmp(ifg->ifg_group, ifgr->ifgr_name) == 0)
1619 break;
1620 if (ifg == NULL) {
1621 IFNET_RUNLOCK();
1622 return (ENOENT);
1623 }
1624
1625 if (ifgr->ifgr_len == 0) {
1626 CK_STAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next)
1627 ifgr->ifgr_len += sizeof(ifgrq);
1628 IFNET_RUNLOCK();
1629 return (0);
1630 }
1631
1632 len = ifgr->ifgr_len;
1633 ifgp = ifgr->ifgr_groups;
1634 CK_STAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) {
1635 if (len < sizeof(ifgrq)) {
1636 IFNET_RUNLOCK();
1637 return (EINVAL);
1638 }
1639 bzero(&ifgrq, sizeof ifgrq);
1640 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname,
1641 sizeof(ifgrq.ifgrq_member));
1642 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) {
1643 IFNET_RUNLOCK();
1644 return (error);
1645 }
1646 len -= sizeof(ifgrq);
1647 ifgp++;
1648 }
1649 IFNET_RUNLOCK();
1650
1651 return (0);
1652 }
1653
1654 /*
1655 * Return counter values from counter(9)s stored in ifnet.
1656 */
1657 uint64_t
if_get_counter_default(struct ifnet * ifp,ift_counter cnt)1658 if_get_counter_default(struct ifnet *ifp, ift_counter cnt)
1659 {
1660
1661 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1662
1663 return (counter_u64_fetch(ifp->if_counters[cnt]));
1664 }
1665
1666 /*
1667 * Increase an ifnet counter. Usually used for counters shared
1668 * between the stack and a driver, but function supports them all.
1669 */
1670 void
if_inc_counter(struct ifnet * ifp,ift_counter cnt,int64_t inc)1671 if_inc_counter(struct ifnet *ifp, ift_counter cnt, int64_t inc)
1672 {
1673
1674 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1675
1676 counter_u64_add(ifp->if_counters[cnt], inc);
1677 }
1678
1679 /*
1680 * Copy data from ifnet to userland API structure if_data.
1681 */
1682 void
if_data_copy(struct ifnet * ifp,struct if_data * ifd)1683 if_data_copy(struct ifnet *ifp, struct if_data *ifd)
1684 {
1685
1686 ifd->ifi_type = ifp->if_type;
1687 ifd->ifi_physical = 0;
1688 ifd->ifi_addrlen = ifp->if_addrlen;
1689 ifd->ifi_hdrlen = ifp->if_hdrlen;
1690 ifd->ifi_link_state = ifp->if_link_state;
1691 ifd->ifi_vhid = 0;
1692 ifd->ifi_datalen = sizeof(struct if_data);
1693 ifd->ifi_mtu = ifp->if_mtu;
1694 ifd->ifi_metric = ifp->if_metric;
1695 ifd->ifi_baudrate = ifp->if_baudrate;
1696 ifd->ifi_hwassist = ifp->if_hwassist;
1697 ifd->ifi_epoch = ifp->if_epoch;
1698 ifd->ifi_lastchange = ifp->if_lastchange;
1699
1700 ifd->ifi_ipackets = ifp->if_get_counter(ifp, IFCOUNTER_IPACKETS);
1701 ifd->ifi_ierrors = ifp->if_get_counter(ifp, IFCOUNTER_IERRORS);
1702 ifd->ifi_opackets = ifp->if_get_counter(ifp, IFCOUNTER_OPACKETS);
1703 ifd->ifi_oerrors = ifp->if_get_counter(ifp, IFCOUNTER_OERRORS);
1704 ifd->ifi_collisions = ifp->if_get_counter(ifp, IFCOUNTER_COLLISIONS);
1705 ifd->ifi_ibytes = ifp->if_get_counter(ifp, IFCOUNTER_IBYTES);
1706 ifd->ifi_obytes = ifp->if_get_counter(ifp, IFCOUNTER_OBYTES);
1707 ifd->ifi_imcasts = ifp->if_get_counter(ifp, IFCOUNTER_IMCASTS);
1708 ifd->ifi_omcasts = ifp->if_get_counter(ifp, IFCOUNTER_OMCASTS);
1709 ifd->ifi_iqdrops = ifp->if_get_counter(ifp, IFCOUNTER_IQDROPS);
1710 ifd->ifi_oqdrops = ifp->if_get_counter(ifp, IFCOUNTER_OQDROPS);
1711 ifd->ifi_noproto = ifp->if_get_counter(ifp, IFCOUNTER_NOPROTO);
1712 }
1713
1714 /*
1715 * Initialization, destruction and refcounting functions for ifaddrs.
1716 */
1717 struct ifaddr *
ifa_alloc(size_t size,int flags)1718 ifa_alloc(size_t size, int flags)
1719 {
1720 struct ifaddr *ifa;
1721
1722 KASSERT(size >= sizeof(struct ifaddr),
1723 ("%s: invalid size %zu", __func__, size));
1724
1725 ifa = malloc(size, M_IFADDR, M_ZERO | flags);
1726 if (ifa == NULL)
1727 return (NULL);
1728
1729 if ((ifa->ifa_opackets = counter_u64_alloc(flags)) == NULL)
1730 goto fail;
1731 if ((ifa->ifa_ipackets = counter_u64_alloc(flags)) == NULL)
1732 goto fail;
1733 if ((ifa->ifa_obytes = counter_u64_alloc(flags)) == NULL)
1734 goto fail;
1735 if ((ifa->ifa_ibytes = counter_u64_alloc(flags)) == NULL)
1736 goto fail;
1737
1738 refcount_init(&ifa->ifa_refcnt, 1);
1739
1740 return (ifa);
1741
1742 fail:
1743 /* free(NULL) is okay */
1744 counter_u64_free(ifa->ifa_opackets);
1745 counter_u64_free(ifa->ifa_ipackets);
1746 counter_u64_free(ifa->ifa_obytes);
1747 counter_u64_free(ifa->ifa_ibytes);
1748 free(ifa, M_IFADDR);
1749
1750 return (NULL);
1751 }
1752
1753 void
ifa_ref(struct ifaddr * ifa)1754 ifa_ref(struct ifaddr *ifa)
1755 {
1756 u_int old __diagused;
1757
1758 old = refcount_acquire(&ifa->ifa_refcnt);
1759 KASSERT(old > 0, ("%s: ifa %p has 0 refs", __func__, ifa));
1760 }
1761
1762 int
ifa_try_ref(struct ifaddr * ifa)1763 ifa_try_ref(struct ifaddr *ifa)
1764 {
1765
1766 NET_EPOCH_ASSERT();
1767 return (refcount_acquire_if_not_zero(&ifa->ifa_refcnt));
1768 }
1769
1770 static void
ifa_destroy(epoch_context_t ctx)1771 ifa_destroy(epoch_context_t ctx)
1772 {
1773 struct ifaddr *ifa;
1774
1775 ifa = __containerof(ctx, struct ifaddr, ifa_epoch_ctx);
1776 counter_u64_free(ifa->ifa_opackets);
1777 counter_u64_free(ifa->ifa_ipackets);
1778 counter_u64_free(ifa->ifa_obytes);
1779 counter_u64_free(ifa->ifa_ibytes);
1780 free(ifa, M_IFADDR);
1781 }
1782
1783 void
ifa_free(struct ifaddr * ifa)1784 ifa_free(struct ifaddr *ifa)
1785 {
1786
1787 if (refcount_release(&ifa->ifa_refcnt))
1788 NET_EPOCH_CALL(ifa_destroy, &ifa->ifa_epoch_ctx);
1789 }
1790
1791 /*
1792 * XXX: Because sockaddr_dl has deeper structure than the sockaddr
1793 * structs used to represent other address families, it is necessary
1794 * to perform a different comparison.
1795 */
1796 static bool
sa_dl_equal(const struct sockaddr * a,const struct sockaddr * b)1797 sa_dl_equal(const struct sockaddr *a, const struct sockaddr *b)
1798 {
1799 const struct sockaddr_dl *sdl1 = (const struct sockaddr_dl *)a;
1800 const struct sockaddr_dl *sdl2 = (const struct sockaddr_dl *)b;
1801
1802 return (sdl1->sdl_len == sdl2->sdl_len &&
1803 bcmp(sdl1->sdl_data + sdl1->sdl_nlen,
1804 sdl2->sdl_data + sdl2->sdl_nlen, sdl1->sdl_alen) == 0);
1805 }
1806
1807 /*
1808 * Locate an interface based on a complete address.
1809 */
1810 /*ARGSUSED*/
1811 struct ifaddr *
ifa_ifwithaddr(const struct sockaddr * addr)1812 ifa_ifwithaddr(const struct sockaddr *addr)
1813 {
1814 struct ifnet *ifp;
1815 struct ifaddr *ifa;
1816
1817 NET_EPOCH_ASSERT();
1818
1819 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1820 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1821 if (ifa->ifa_addr->sa_family != addr->sa_family)
1822 continue;
1823 if (sa_equal(addr, ifa->ifa_addr)) {
1824 goto done;
1825 }
1826 /* IP6 doesn't have broadcast */
1827 if ((ifp->if_flags & IFF_BROADCAST) &&
1828 ifa->ifa_broadaddr &&
1829 ifa->ifa_broadaddr->sa_len != 0 &&
1830 sa_equal(ifa->ifa_broadaddr, addr)) {
1831 goto done;
1832 }
1833 }
1834 }
1835 ifa = NULL;
1836 done:
1837 return (ifa);
1838 }
1839
1840 int
ifa_ifwithaddr_check(const struct sockaddr * addr)1841 ifa_ifwithaddr_check(const struct sockaddr *addr)
1842 {
1843 struct epoch_tracker et;
1844 int rc;
1845
1846 NET_EPOCH_ENTER(et);
1847 rc = (ifa_ifwithaddr(addr) != NULL);
1848 NET_EPOCH_EXIT(et);
1849 return (rc);
1850 }
1851
1852 /*
1853 * Locate an interface based on the broadcast address.
1854 */
1855 /* ARGSUSED */
1856 struct ifaddr *
ifa_ifwithbroadaddr(const struct sockaddr * addr,int fibnum)1857 ifa_ifwithbroadaddr(const struct sockaddr *addr, int fibnum)
1858 {
1859 struct ifnet *ifp;
1860 struct ifaddr *ifa;
1861
1862 NET_EPOCH_ASSERT();
1863 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1864 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1865 continue;
1866 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1867 if (ifa->ifa_addr->sa_family != addr->sa_family)
1868 continue;
1869 if ((ifp->if_flags & IFF_BROADCAST) &&
1870 ifa->ifa_broadaddr &&
1871 ifa->ifa_broadaddr->sa_len != 0 &&
1872 sa_equal(ifa->ifa_broadaddr, addr)) {
1873 goto done;
1874 }
1875 }
1876 }
1877 ifa = NULL;
1878 done:
1879 return (ifa);
1880 }
1881
1882 /*
1883 * Locate the point to point interface with a given destination address.
1884 */
1885 /*ARGSUSED*/
1886 struct ifaddr *
ifa_ifwithdstaddr(const struct sockaddr * addr,int fibnum)1887 ifa_ifwithdstaddr(const struct sockaddr *addr, int fibnum)
1888 {
1889 struct ifnet *ifp;
1890 struct ifaddr *ifa;
1891
1892 NET_EPOCH_ASSERT();
1893 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1894 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
1895 continue;
1896 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1897 continue;
1898 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1899 if (ifa->ifa_addr->sa_family != addr->sa_family)
1900 continue;
1901 if (ifa->ifa_dstaddr != NULL &&
1902 sa_equal(addr, ifa->ifa_dstaddr)) {
1903 goto done;
1904 }
1905 }
1906 }
1907 ifa = NULL;
1908 done:
1909 return (ifa);
1910 }
1911
1912 /*
1913 * Find an interface on a specific network. If many, choice
1914 * is most specific found.
1915 */
1916 struct ifaddr *
ifa_ifwithnet(const struct sockaddr * addr,int ignore_ptp,int fibnum)1917 ifa_ifwithnet(const struct sockaddr *addr, int ignore_ptp, int fibnum)
1918 {
1919 struct ifnet *ifp;
1920 struct ifaddr *ifa;
1921 struct ifaddr *ifa_maybe = NULL;
1922 u_int af = addr->sa_family;
1923 const char *addr_data = addr->sa_data, *cplim;
1924
1925 NET_EPOCH_ASSERT();
1926 /*
1927 * AF_LINK addresses can be looked up directly by their index number,
1928 * so do that if we can.
1929 */
1930 if (af == AF_LINK) {
1931 ifp = ifnet_byindex(
1932 ((const struct sockaddr_dl *)addr)->sdl_index);
1933 return (ifp ? ifp->if_addr : NULL);
1934 }
1935
1936 /*
1937 * Scan though each interface, looking for ones that have addresses
1938 * in this address family and the requested fib.
1939 */
1940 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1941 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1942 continue;
1943 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1944 const char *cp, *cp2, *cp3;
1945
1946 if (ifa->ifa_addr->sa_family != af)
1947 next: continue;
1948 if (af == AF_INET &&
1949 ifp->if_flags & IFF_POINTOPOINT && !ignore_ptp) {
1950 /*
1951 * This is a bit broken as it doesn't
1952 * take into account that the remote end may
1953 * be a single node in the network we are
1954 * looking for.
1955 * The trouble is that we don't know the
1956 * netmask for the remote end.
1957 */
1958 if (ifa->ifa_dstaddr != NULL &&
1959 sa_equal(addr, ifa->ifa_dstaddr)) {
1960 goto done;
1961 }
1962 } else {
1963 /*
1964 * Scan all the bits in the ifa's address.
1965 * If a bit dissagrees with what we are
1966 * looking for, mask it with the netmask
1967 * to see if it really matters.
1968 * (A byte at a time)
1969 */
1970 if (ifa->ifa_netmask == 0)
1971 continue;
1972 cp = addr_data;
1973 cp2 = ifa->ifa_addr->sa_data;
1974 cp3 = ifa->ifa_netmask->sa_data;
1975 cplim = ifa->ifa_netmask->sa_len
1976 + (char *)ifa->ifa_netmask;
1977 while (cp3 < cplim)
1978 if ((*cp++ ^ *cp2++) & *cp3++)
1979 goto next; /* next address! */
1980 /*
1981 * If the netmask of what we just found
1982 * is more specific than what we had before
1983 * (if we had one), or if the virtual status
1984 * of new prefix is better than of the old one,
1985 * then remember the new one before continuing
1986 * to search for an even better one.
1987 */
1988 if (ifa_maybe == NULL ||
1989 ifa_preferred(ifa_maybe, ifa) ||
1990 rn_refines((caddr_t)ifa->ifa_netmask,
1991 (caddr_t)ifa_maybe->ifa_netmask)) {
1992 ifa_maybe = ifa;
1993 }
1994 }
1995 }
1996 }
1997 ifa = ifa_maybe;
1998 ifa_maybe = NULL;
1999 done:
2000 return (ifa);
2001 }
2002
2003 /*
2004 * Find an interface address specific to an interface best matching
2005 * a given address.
2006 */
2007 struct ifaddr *
ifaof_ifpforaddr(const struct sockaddr * addr,struct ifnet * ifp)2008 ifaof_ifpforaddr(const struct sockaddr *addr, struct ifnet *ifp)
2009 {
2010 struct ifaddr *ifa;
2011 const char *cp, *cp2, *cp3;
2012 char *cplim;
2013 struct ifaddr *ifa_maybe = NULL;
2014 u_int af = addr->sa_family;
2015
2016 if (af >= AF_MAX)
2017 return (NULL);
2018
2019 NET_EPOCH_ASSERT();
2020 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2021 if (ifa->ifa_addr->sa_family != af)
2022 continue;
2023 if (ifa_maybe == NULL)
2024 ifa_maybe = ifa;
2025 if (ifa->ifa_netmask == 0) {
2026 if (sa_equal(addr, ifa->ifa_addr) ||
2027 (ifa->ifa_dstaddr &&
2028 sa_equal(addr, ifa->ifa_dstaddr)))
2029 goto done;
2030 continue;
2031 }
2032 if (ifp->if_flags & IFF_POINTOPOINT) {
2033 if (ifa->ifa_dstaddr && sa_equal(addr, ifa->ifa_dstaddr))
2034 goto done;
2035 } else {
2036 cp = addr->sa_data;
2037 cp2 = ifa->ifa_addr->sa_data;
2038 cp3 = ifa->ifa_netmask->sa_data;
2039 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
2040 for (; cp3 < cplim; cp3++)
2041 if ((*cp++ ^ *cp2++) & *cp3)
2042 break;
2043 if (cp3 == cplim)
2044 goto done;
2045 }
2046 }
2047 ifa = ifa_maybe;
2048 done:
2049 return (ifa);
2050 }
2051
2052 /*
2053 * See whether new ifa is better than current one:
2054 * 1) A non-virtual one is preferred over virtual.
2055 * 2) A virtual in master state preferred over any other state.
2056 *
2057 * Used in several address selecting functions.
2058 */
2059 int
ifa_preferred(struct ifaddr * cur,struct ifaddr * next)2060 ifa_preferred(struct ifaddr *cur, struct ifaddr *next)
2061 {
2062
2063 return (cur->ifa_carp && (!next->ifa_carp ||
2064 ((*carp_master_p)(next) && !(*carp_master_p)(cur))));
2065 }
2066
2067 struct sockaddr_dl *
link_alloc_sdl(size_t size,int flags)2068 link_alloc_sdl(size_t size, int flags)
2069 {
2070
2071 return (malloc(size, M_TEMP, flags));
2072 }
2073
2074 void
link_free_sdl(struct sockaddr * sa)2075 link_free_sdl(struct sockaddr *sa)
2076 {
2077 free(sa, M_TEMP);
2078 }
2079
2080 /*
2081 * Fills in given sdl with interface basic info.
2082 * Returns pointer to filled sdl.
2083 */
2084 struct sockaddr_dl *
link_init_sdl(struct ifnet * ifp,struct sockaddr * paddr,u_char iftype)2085 link_init_sdl(struct ifnet *ifp, struct sockaddr *paddr, u_char iftype)
2086 {
2087 struct sockaddr_dl *sdl;
2088
2089 sdl = (struct sockaddr_dl *)paddr;
2090 memset(sdl, 0, sizeof(struct sockaddr_dl));
2091 sdl->sdl_len = sizeof(struct sockaddr_dl);
2092 sdl->sdl_family = AF_LINK;
2093 sdl->sdl_index = ifp->if_index;
2094 sdl->sdl_type = iftype;
2095
2096 return (sdl);
2097 }
2098
2099 void (*vlan_link_state_p)(struct ifnet *); /* XXX: private from if_vlan */
2100 void (*vlan_trunk_cap_p)(struct ifnet *); /* XXX: private from if_vlan */
2101 struct ifnet *(*vlan_trunkdev_p)(struct ifnet *);
2102 struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t);
2103 int (*vlan_tag_p)(struct ifnet *, uint16_t *);
2104 int (*vlan_pcp_p)(struct ifnet *, uint16_t *);
2105 int (*vlan_setcookie_p)(struct ifnet *, void *);
2106 void *(*vlan_cookie_p)(struct ifnet *);
2107 void (*vlan_input_p)(struct ifnet *, struct mbuf *);
2108
2109 /*
2110 * Handle a change in the interface link state. To avoid LORs
2111 * between driver lock and upper layer locks, as well as possible
2112 * recursions, we post event to taskqueue, and all job
2113 * is done in static do_link_state_change().
2114 */
2115 void
if_link_state_change(struct ifnet * ifp,int link_state)2116 if_link_state_change(struct ifnet *ifp, int link_state)
2117 {
2118 /* Return if state hasn't changed. */
2119 if (ifp->if_link_state == link_state)
2120 return;
2121
2122 ifp->if_link_state = link_state;
2123
2124 /* XXXGL: reference ifp? */
2125 taskqueue_enqueue(taskqueue_swi, &ifp->if_linktask);
2126 }
2127
2128 static void
do_link_state_change(void * arg,int pending)2129 do_link_state_change(void *arg, int pending)
2130 {
2131 struct ifnet *ifp;
2132 int link_state;
2133
2134 ifp = arg;
2135 link_state = ifp->if_link_state;
2136
2137 CURVNET_SET(ifp->if_vnet);
2138 rt_ifmsg(ifp, 0);
2139 if (ifp->if_vlantrunk != NULL)
2140 (*vlan_link_state_p)(ifp);
2141
2142 if ((ifp->if_type == IFT_ETHER || ifp->if_type == IFT_L2VLAN) &&
2143 ifp->if_l2com != NULL)
2144 (*ng_ether_link_state_p)(ifp, link_state);
2145 if (ifp->if_carp)
2146 (*carp_linkstate_p)(ifp);
2147 if (ifp->if_bridge)
2148 ifp->if_bridge_linkstate(ifp);
2149 if (ifp->if_lagg)
2150 (*lagg_linkstate_p)(ifp, link_state);
2151
2152 if (IS_DEFAULT_VNET(curvnet))
2153 devctl_notify("IFNET", ifp->if_xname,
2154 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN",
2155 NULL);
2156 if (pending > 1)
2157 if_printf(ifp, "%d link states coalesced\n", pending);
2158 if (log_link_state_change)
2159 if_printf(ifp, "link state changed to %s\n",
2160 (link_state == LINK_STATE_UP) ? "UP" : "DOWN" );
2161 EVENTHANDLER_INVOKE(ifnet_link_event, ifp, link_state);
2162 CURVNET_RESTORE();
2163 }
2164
2165 /*
2166 * Mark an interface down and notify protocols of
2167 * the transition.
2168 */
2169 void
if_down(struct ifnet * ifp)2170 if_down(struct ifnet *ifp)
2171 {
2172
2173 EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_DOWN);
2174
2175 ifp->if_flags &= ~IFF_UP;
2176 getmicrotime(&ifp->if_lastchange);
2177 ifp->if_qflush(ifp);
2178
2179 if (ifp->if_carp)
2180 (*carp_linkstate_p)(ifp);
2181 rt_ifmsg(ifp, IFF_UP);
2182 }
2183
2184 /*
2185 * Mark an interface up and notify protocols of
2186 * the transition.
2187 */
2188 void
if_up(struct ifnet * ifp)2189 if_up(struct ifnet *ifp)
2190 {
2191
2192 ifp->if_flags |= IFF_UP;
2193 getmicrotime(&ifp->if_lastchange);
2194 if (ifp->if_carp)
2195 (*carp_linkstate_p)(ifp);
2196 rt_ifmsg(ifp, IFF_UP);
2197 EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_UP);
2198 }
2199
2200 /*
2201 * Flush an interface queue.
2202 */
2203 void
if_qflush(struct ifnet * ifp)2204 if_qflush(struct ifnet *ifp)
2205 {
2206 struct mbuf *m, *n;
2207 struct ifaltq *ifq;
2208
2209 ifq = &ifp->if_snd;
2210 IFQ_LOCK(ifq);
2211 #ifdef ALTQ
2212 if (ALTQ_IS_ENABLED(ifq))
2213 ALTQ_PURGE(ifq);
2214 #endif
2215 n = ifq->ifq_head;
2216 while ((m = n) != NULL) {
2217 n = m->m_nextpkt;
2218 m_freem(m);
2219 }
2220 ifq->ifq_head = 0;
2221 ifq->ifq_tail = 0;
2222 ifq->ifq_len = 0;
2223 IFQ_UNLOCK(ifq);
2224 }
2225
2226 /*
2227 * Map interface name to interface structure pointer, with or without
2228 * returning a reference.
2229 */
2230 struct ifnet *
ifunit_ref(const char * name)2231 ifunit_ref(const char *name)
2232 {
2233 struct epoch_tracker et;
2234 struct ifnet *ifp;
2235
2236 NET_EPOCH_ENTER(et);
2237 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2238 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0 &&
2239 !(ifp->if_flags & IFF_DYING))
2240 break;
2241 }
2242 if (ifp != NULL) {
2243 if_ref(ifp);
2244 MPASS(ifindex_table[ifp->if_index].ife_ifnet == ifp);
2245 }
2246
2247 NET_EPOCH_EXIT(et);
2248 return (ifp);
2249 }
2250
2251 struct ifnet *
ifunit(const char * name)2252 ifunit(const char *name)
2253 {
2254 struct epoch_tracker et;
2255 struct ifnet *ifp;
2256
2257 NET_EPOCH_ENTER(et);
2258 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2259 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0)
2260 break;
2261 }
2262 NET_EPOCH_EXIT(et);
2263 return (ifp);
2264 }
2265
2266 void *
ifr_buffer_get_buffer(void * data)2267 ifr_buffer_get_buffer(void *data)
2268 {
2269 union ifreq_union *ifrup;
2270
2271 ifrup = data;
2272 #ifdef COMPAT_FREEBSD32
2273 if (SV_CURPROC_FLAG(SV_ILP32))
2274 return ((void *)(uintptr_t)
2275 ifrup->ifr32.ifr_ifru.ifru_buffer.buffer);
2276 #endif
2277 return (ifrup->ifr.ifr_ifru.ifru_buffer.buffer);
2278 }
2279
2280 static void
ifr_buffer_set_buffer_null(void * data)2281 ifr_buffer_set_buffer_null(void *data)
2282 {
2283 union ifreq_union *ifrup;
2284
2285 ifrup = data;
2286 #ifdef COMPAT_FREEBSD32
2287 if (SV_CURPROC_FLAG(SV_ILP32))
2288 ifrup->ifr32.ifr_ifru.ifru_buffer.buffer = 0;
2289 else
2290 #endif
2291 ifrup->ifr.ifr_ifru.ifru_buffer.buffer = NULL;
2292 }
2293
2294 size_t
ifr_buffer_get_length(void * data)2295 ifr_buffer_get_length(void *data)
2296 {
2297 union ifreq_union *ifrup;
2298
2299 ifrup = data;
2300 #ifdef COMPAT_FREEBSD32
2301 if (SV_CURPROC_FLAG(SV_ILP32))
2302 return (ifrup->ifr32.ifr_ifru.ifru_buffer.length);
2303 #endif
2304 return (ifrup->ifr.ifr_ifru.ifru_buffer.length);
2305 }
2306
2307 static void
ifr_buffer_set_length(void * data,size_t len)2308 ifr_buffer_set_length(void *data, size_t len)
2309 {
2310 union ifreq_union *ifrup;
2311
2312 ifrup = data;
2313 #ifdef COMPAT_FREEBSD32
2314 if (SV_CURPROC_FLAG(SV_ILP32))
2315 ifrup->ifr32.ifr_ifru.ifru_buffer.length = len;
2316 else
2317 #endif
2318 ifrup->ifr.ifr_ifru.ifru_buffer.length = len;
2319 }
2320
2321 void *
ifr_data_get_ptr(void * ifrp)2322 ifr_data_get_ptr(void *ifrp)
2323 {
2324 union ifreq_union *ifrup;
2325
2326 ifrup = ifrp;
2327 #ifdef COMPAT_FREEBSD32
2328 if (SV_CURPROC_FLAG(SV_ILP32))
2329 return ((void *)(uintptr_t)
2330 ifrup->ifr32.ifr_ifru.ifru_data);
2331 #endif
2332 return (ifrup->ifr.ifr_ifru.ifru_data);
2333 }
2334
2335 struct ifcap_nv_bit_name {
2336 uint64_t cap_bit;
2337 const char *cap_name;
2338 };
2339 #define CAPNV(x) {.cap_bit = IFCAP_##x, \
2340 .cap_name = __CONCAT(IFCAP_, __CONCAT(x, _NAME)) }
2341 const struct ifcap_nv_bit_name ifcap_nv_bit_names[] = {
2342 CAPNV(RXCSUM),
2343 CAPNV(TXCSUM),
2344 CAPNV(NETCONS),
2345 CAPNV(VLAN_MTU),
2346 CAPNV(VLAN_HWTAGGING),
2347 CAPNV(JUMBO_MTU),
2348 CAPNV(POLLING),
2349 CAPNV(VLAN_HWCSUM),
2350 CAPNV(TSO4),
2351 CAPNV(TSO6),
2352 CAPNV(LRO),
2353 CAPNV(WOL_UCAST),
2354 CAPNV(WOL_MCAST),
2355 CAPNV(WOL_MAGIC),
2356 CAPNV(TOE4),
2357 CAPNV(TOE6),
2358 CAPNV(VLAN_HWFILTER),
2359 CAPNV(VLAN_HWTSO),
2360 CAPNV(LINKSTATE),
2361 CAPNV(NETMAP),
2362 CAPNV(RXCSUM_IPV6),
2363 CAPNV(TXCSUM_IPV6),
2364 CAPNV(HWSTATS),
2365 CAPNV(TXRTLMT),
2366 CAPNV(HWRXTSTMP),
2367 CAPNV(MEXTPG),
2368 CAPNV(TXTLS4),
2369 CAPNV(TXTLS6),
2370 CAPNV(VXLAN_HWCSUM),
2371 CAPNV(VXLAN_HWTSO),
2372 CAPNV(TXTLS_RTLMT),
2373 {0, NULL}
2374 };
2375 #define CAP2NV(x) {.cap_bit = IFCAP2_BIT(IFCAP2_##x), \
2376 .cap_name = __CONCAT(IFCAP2_, __CONCAT(x, _NAME)) }
2377 const struct ifcap_nv_bit_name ifcap2_nv_bit_names[] = {
2378 CAP2NV(RXTLS4),
2379 CAP2NV(RXTLS6),
2380 CAP2NV(IPSEC_OFFLOAD),
2381 {0, NULL}
2382 };
2383 #undef CAPNV
2384 #undef CAP2NV
2385
2386 int
if_capnv_to_capint(const nvlist_t * nv,int * old_cap,const struct ifcap_nv_bit_name * nn,bool all)2387 if_capnv_to_capint(const nvlist_t *nv, int *old_cap,
2388 const struct ifcap_nv_bit_name *nn, bool all)
2389 {
2390 int i, res;
2391
2392 res = 0;
2393 for (i = 0; nn[i].cap_name != NULL; i++) {
2394 if (nvlist_exists_bool(nv, nn[i].cap_name)) {
2395 if (all || nvlist_get_bool(nv, nn[i].cap_name))
2396 res |= nn[i].cap_bit;
2397 } else {
2398 res |= *old_cap & nn[i].cap_bit;
2399 }
2400 }
2401 return (res);
2402 }
2403
2404 void
if_capint_to_capnv(nvlist_t * nv,const struct ifcap_nv_bit_name * nn,int ifr_cap,int ifr_req)2405 if_capint_to_capnv(nvlist_t *nv, const struct ifcap_nv_bit_name *nn,
2406 int ifr_cap, int ifr_req)
2407 {
2408 int i;
2409
2410 for (i = 0; nn[i].cap_name != NULL; i++) {
2411 if ((nn[i].cap_bit & ifr_cap) != 0) {
2412 nvlist_add_bool(nv, nn[i].cap_name,
2413 (nn[i].cap_bit & ifr_req) != 0);
2414 }
2415 }
2416 }
2417
2418 /*
2419 * Hardware specific interface ioctls.
2420 */
2421 int
ifhwioctl(u_long cmd,struct ifnet * ifp,caddr_t data,struct thread * td)2422 ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td)
2423 {
2424 struct ifreq *ifr;
2425 int error = 0, do_ifup = 0;
2426 int new_flags, temp_flags;
2427 size_t descrlen, nvbuflen;
2428 char *descrbuf;
2429 char new_name[IFNAMSIZ];
2430 void *buf;
2431 nvlist_t *nvcap;
2432 struct siocsifcapnv_driver_data drv_ioctl_data;
2433
2434 ifr = (struct ifreq *)data;
2435 switch (cmd) {
2436 case SIOCGIFINDEX:
2437 ifr->ifr_index = ifp->if_index;
2438 break;
2439
2440 case SIOCGIFFLAGS:
2441 temp_flags = ifp->if_flags | ifp->if_drv_flags;
2442 ifr->ifr_flags = temp_flags & 0xffff;
2443 ifr->ifr_flagshigh = temp_flags >> 16;
2444 break;
2445
2446 case SIOCGIFCAP:
2447 ifr->ifr_reqcap = ifp->if_capabilities;
2448 ifr->ifr_curcap = ifp->if_capenable;
2449 break;
2450
2451 case SIOCGIFCAPNV:
2452 if ((ifp->if_capabilities & IFCAP_NV) == 0) {
2453 error = EINVAL;
2454 break;
2455 }
2456 buf = NULL;
2457 nvcap = nvlist_create(0);
2458 for (;;) {
2459 if_capint_to_capnv(nvcap, ifcap_nv_bit_names,
2460 ifp->if_capabilities, ifp->if_capenable);
2461 if_capint_to_capnv(nvcap, ifcap2_nv_bit_names,
2462 ifp->if_capabilities2, ifp->if_capenable2);
2463 error = (*ifp->if_ioctl)(ifp, SIOCGIFCAPNV,
2464 __DECONST(caddr_t, nvcap));
2465 if (error != 0) {
2466 if_printf(ifp,
2467 "SIOCGIFCAPNV driver mistake: nvlist error %d\n",
2468 error);
2469 break;
2470 }
2471 buf = nvlist_pack(nvcap, &nvbuflen);
2472 if (buf == NULL) {
2473 error = nvlist_error(nvcap);
2474 if (error == 0)
2475 error = EDOOFUS;
2476 break;
2477 }
2478 if (nvbuflen > ifr->ifr_cap_nv.buf_length) {
2479 ifr->ifr_cap_nv.length = nvbuflen;
2480 ifr->ifr_cap_nv.buffer = NULL;
2481 error = EFBIG;
2482 break;
2483 }
2484 ifr->ifr_cap_nv.length = nvbuflen;
2485 error = copyout(buf, ifr->ifr_cap_nv.buffer, nvbuflen);
2486 break;
2487 }
2488 free(buf, M_NVLIST);
2489 nvlist_destroy(nvcap);
2490 break;
2491
2492 case SIOCGIFDATA:
2493 {
2494 struct if_data ifd;
2495
2496 /* Ensure uninitialised padding is not leaked. */
2497 memset(&ifd, 0, sizeof(ifd));
2498
2499 if_data_copy(ifp, &ifd);
2500 error = copyout(&ifd, ifr_data_get_ptr(ifr), sizeof(ifd));
2501 break;
2502 }
2503
2504 #ifdef MAC
2505 case SIOCGIFMAC:
2506 error = mac_ifnet_ioctl_get(td->td_ucred, ifr, ifp);
2507 break;
2508 #endif
2509
2510 case SIOCGIFMETRIC:
2511 ifr->ifr_metric = ifp->if_metric;
2512 break;
2513
2514 case SIOCGIFMTU:
2515 ifr->ifr_mtu = ifp->if_mtu;
2516 break;
2517
2518 case SIOCGIFPHYS:
2519 /* XXXGL: did this ever worked? */
2520 ifr->ifr_phys = 0;
2521 break;
2522
2523 case SIOCGIFDESCR:
2524 error = 0;
2525 sx_slock(&ifdescr_sx);
2526 if (ifp->if_description == NULL)
2527 error = ENOMSG;
2528 else {
2529 /* space for terminating nul */
2530 descrlen = strlen(ifp->if_description) + 1;
2531 if (ifr_buffer_get_length(ifr) < descrlen)
2532 ifr_buffer_set_buffer_null(ifr);
2533 else
2534 error = copyout(ifp->if_description,
2535 ifr_buffer_get_buffer(ifr), descrlen);
2536 ifr_buffer_set_length(ifr, descrlen);
2537 }
2538 sx_sunlock(&ifdescr_sx);
2539 break;
2540
2541 case SIOCSIFDESCR:
2542 error = priv_check(td, PRIV_NET_SETIFDESCR);
2543 if (error)
2544 return (error);
2545
2546 /*
2547 * Copy only (length-1) bytes to make sure that
2548 * if_description is always nul terminated. The
2549 * length parameter is supposed to count the
2550 * terminating nul in.
2551 */
2552 if (ifr_buffer_get_length(ifr) > ifdescr_maxlen)
2553 return (ENAMETOOLONG);
2554 else if (ifr_buffer_get_length(ifr) == 0)
2555 descrbuf = NULL;
2556 else {
2557 descrbuf = if_allocdescr(ifr_buffer_get_length(ifr), M_WAITOK);
2558 error = copyin(ifr_buffer_get_buffer(ifr), descrbuf,
2559 ifr_buffer_get_length(ifr) - 1);
2560 if (error) {
2561 if_freedescr(descrbuf);
2562 break;
2563 }
2564 }
2565
2566 if_setdescr(ifp, descrbuf);
2567 getmicrotime(&ifp->if_lastchange);
2568 break;
2569
2570 case SIOCGIFFIB:
2571 ifr->ifr_fib = ifp->if_fib;
2572 break;
2573
2574 case SIOCSIFFIB:
2575 error = priv_check(td, PRIV_NET_SETIFFIB);
2576 if (error)
2577 return (error);
2578 if (ifr->ifr_fib >= rt_numfibs)
2579 return (EINVAL);
2580
2581 ifp->if_fib = ifr->ifr_fib;
2582 break;
2583
2584 case SIOCSIFFLAGS:
2585 error = priv_check(td, PRIV_NET_SETIFFLAGS);
2586 if (error)
2587 return (error);
2588 /*
2589 * Currently, no driver owned flags pass the IFF_CANTCHANGE
2590 * check, so we don't need special handling here yet.
2591 */
2592 new_flags = (ifr->ifr_flags & 0xffff) |
2593 (ifr->ifr_flagshigh << 16);
2594 if (ifp->if_flags & IFF_UP &&
2595 (new_flags & IFF_UP) == 0) {
2596 if_down(ifp);
2597 } else if (new_flags & IFF_UP &&
2598 (ifp->if_flags & IFF_UP) == 0) {
2599 do_ifup = 1;
2600 }
2601
2602 /*
2603 * See if the promiscuous mode or allmulti bits are about to
2604 * flip. They require special handling because in-kernel
2605 * consumers may indepdently toggle them.
2606 */
2607 if_setppromisc(ifp, new_flags & IFF_PPROMISC);
2608 if ((ifp->if_flags ^ new_flags) & IFF_PALLMULTI) {
2609 if (new_flags & IFF_PALLMULTI)
2610 ifp->if_flags |= IFF_ALLMULTI;
2611 else if (ifp->if_amcount == 0)
2612 ifp->if_flags &= ~IFF_ALLMULTI;
2613 }
2614 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
2615 (new_flags &~ IFF_CANTCHANGE);
2616 if (ifp->if_ioctl) {
2617 (void) (*ifp->if_ioctl)(ifp, cmd, data);
2618 }
2619 if (do_ifup)
2620 if_up(ifp);
2621 getmicrotime(&ifp->if_lastchange);
2622 break;
2623
2624 case SIOCSIFCAP:
2625 error = priv_check(td, PRIV_NET_SETIFCAP);
2626 if (error != 0)
2627 return (error);
2628 if (ifp->if_ioctl == NULL)
2629 return (EOPNOTSUPP);
2630 if (ifr->ifr_reqcap & ~ifp->if_capabilities)
2631 return (EINVAL);
2632 error = (*ifp->if_ioctl)(ifp, cmd, data);
2633 if (error == 0)
2634 getmicrotime(&ifp->if_lastchange);
2635 break;
2636
2637 case SIOCSIFCAPNV:
2638 error = priv_check(td, PRIV_NET_SETIFCAP);
2639 if (error != 0)
2640 return (error);
2641 if (ifp->if_ioctl == NULL)
2642 return (EOPNOTSUPP);
2643 if ((ifp->if_capabilities & IFCAP_NV) == 0)
2644 return (EINVAL);
2645 if (ifr->ifr_cap_nv.length > IFR_CAP_NV_MAXBUFSIZE)
2646 return (EINVAL);
2647 nvcap = NULL;
2648 buf = malloc(ifr->ifr_cap_nv.length, M_TEMP, M_WAITOK);
2649 for (;;) {
2650 error = copyin(ifr->ifr_cap_nv.buffer, buf,
2651 ifr->ifr_cap_nv.length);
2652 if (error != 0)
2653 break;
2654 nvcap = nvlist_unpack(buf, ifr->ifr_cap_nv.length, 0);
2655 if (nvcap == NULL) {
2656 error = EINVAL;
2657 break;
2658 }
2659 drv_ioctl_data.reqcap = if_capnv_to_capint(nvcap,
2660 &ifp->if_capenable, ifcap_nv_bit_names, false);
2661 if ((drv_ioctl_data.reqcap &
2662 ~ifp->if_capabilities) != 0) {
2663 error = EINVAL;
2664 break;
2665 }
2666 drv_ioctl_data.reqcap2 = if_capnv_to_capint(nvcap,
2667 &ifp->if_capenable2, ifcap2_nv_bit_names, false);
2668 if ((drv_ioctl_data.reqcap2 &
2669 ~ifp->if_capabilities2) != 0) {
2670 error = EINVAL;
2671 break;
2672 }
2673 drv_ioctl_data.nvcap = nvcap;
2674 error = (*ifp->if_ioctl)(ifp, SIOCSIFCAPNV,
2675 (caddr_t)&drv_ioctl_data);
2676 break;
2677 }
2678 nvlist_destroy(nvcap);
2679 free(buf, M_TEMP);
2680 if (error == 0)
2681 getmicrotime(&ifp->if_lastchange);
2682 break;
2683
2684 #ifdef MAC
2685 case SIOCSIFMAC:
2686 error = mac_ifnet_ioctl_set(td->td_ucred, ifr, ifp);
2687 break;
2688 #endif
2689
2690 case SIOCSIFNAME:
2691 error = priv_check(td, PRIV_NET_SETIFNAME);
2692 if (error)
2693 return (error);
2694 error = copyinstr(ifr_data_get_ptr(ifr), new_name, IFNAMSIZ,
2695 NULL);
2696 if (error != 0)
2697 return (error);
2698 error = if_rename(ifp, new_name);
2699 break;
2700
2701 #ifdef VIMAGE
2702 case SIOCSIFVNET:
2703 error = priv_check(td, PRIV_NET_SETIFVNET);
2704 if (error)
2705 return (error);
2706 error = if_vmove_loan(td, ifp, ifr->ifr_name, ifr->ifr_jid);
2707 break;
2708 #endif
2709
2710 case SIOCSIFMETRIC:
2711 error = priv_check(td, PRIV_NET_SETIFMETRIC);
2712 if (error)
2713 return (error);
2714 ifp->if_metric = ifr->ifr_metric;
2715 getmicrotime(&ifp->if_lastchange);
2716 break;
2717
2718 case SIOCSIFPHYS:
2719 error = priv_check(td, PRIV_NET_SETIFPHYS);
2720 if (error)
2721 return (error);
2722 if (ifp->if_ioctl == NULL)
2723 return (EOPNOTSUPP);
2724 error = (*ifp->if_ioctl)(ifp, cmd, data);
2725 if (error == 0)
2726 getmicrotime(&ifp->if_lastchange);
2727 break;
2728
2729 case SIOCSIFMTU:
2730 {
2731 u_long oldmtu = ifp->if_mtu;
2732
2733 error = priv_check(td, PRIV_NET_SETIFMTU);
2734 if (error)
2735 return (error);
2736 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU)
2737 return (EINVAL);
2738 if (ifp->if_ioctl == NULL)
2739 return (EOPNOTSUPP);
2740 /* Disallow MTU changes on bridge member interfaces. */
2741 if (ifp->if_bridge)
2742 return (EOPNOTSUPP);
2743 error = (*ifp->if_ioctl)(ifp, cmd, data);
2744 if (error == 0) {
2745 getmicrotime(&ifp->if_lastchange);
2746 rt_ifmsg(ifp, 0);
2747 #ifdef INET
2748 DEBUGNET_NOTIFY_MTU(ifp);
2749 #endif
2750 }
2751 /*
2752 * If the link MTU changed, do network layer specific procedure.
2753 */
2754 if (ifp->if_mtu != oldmtu)
2755 if_notifymtu(ifp);
2756 break;
2757 }
2758
2759 case SIOCADDMULTI:
2760 case SIOCDELMULTI:
2761 if (cmd == SIOCADDMULTI)
2762 error = priv_check(td, PRIV_NET_ADDMULTI);
2763 else
2764 error = priv_check(td, PRIV_NET_DELMULTI);
2765 if (error)
2766 return (error);
2767
2768 /* Don't allow group membership on non-multicast interfaces. */
2769 if ((ifp->if_flags & IFF_MULTICAST) == 0)
2770 return (EOPNOTSUPP);
2771
2772 /* Don't let users screw up protocols' entries. */
2773 if (ifr->ifr_addr.sa_family != AF_LINK)
2774 return (EINVAL);
2775
2776 if (cmd == SIOCADDMULTI) {
2777 struct epoch_tracker et;
2778 struct ifmultiaddr *ifma;
2779
2780 /*
2781 * Userland is only permitted to join groups once
2782 * via the if_addmulti() KPI, because it cannot hold
2783 * struct ifmultiaddr * between calls. It may also
2784 * lose a race while we check if the membership
2785 * already exists.
2786 */
2787 NET_EPOCH_ENTER(et);
2788 ifma = if_findmulti(ifp, &ifr->ifr_addr);
2789 NET_EPOCH_EXIT(et);
2790 if (ifma != NULL)
2791 error = EADDRINUSE;
2792 else
2793 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma);
2794 } else {
2795 error = if_delmulti(ifp, &ifr->ifr_addr);
2796 }
2797 if (error == 0)
2798 getmicrotime(&ifp->if_lastchange);
2799 break;
2800
2801 case SIOCSIFPHYADDR:
2802 case SIOCDIFPHYADDR:
2803 #ifdef INET6
2804 case SIOCSIFPHYADDR_IN6:
2805 #endif
2806 case SIOCSIFMEDIA:
2807 case SIOCSIFGENERIC:
2808 error = priv_check(td, PRIV_NET_HWIOCTL);
2809 if (error)
2810 return (error);
2811 if (ifp->if_ioctl == NULL)
2812 return (EOPNOTSUPP);
2813 error = (*ifp->if_ioctl)(ifp, cmd, data);
2814 if (error == 0)
2815 getmicrotime(&ifp->if_lastchange);
2816 break;
2817
2818 case SIOCGIFSTATUS:
2819 case SIOCGIFPSRCADDR:
2820 case SIOCGIFPDSTADDR:
2821 case SIOCGIFMEDIA:
2822 case SIOCGIFXMEDIA:
2823 case SIOCGIFGENERIC:
2824 case SIOCGIFRSSKEY:
2825 case SIOCGIFRSSHASH:
2826 case SIOCGIFDOWNREASON:
2827 if (ifp->if_ioctl == NULL)
2828 return (EOPNOTSUPP);
2829 error = (*ifp->if_ioctl)(ifp, cmd, data);
2830 break;
2831
2832 case SIOCSIFLLADDR:
2833 error = priv_check(td, PRIV_NET_SETLLADDR);
2834 if (error)
2835 return (error);
2836 error = if_setlladdr(ifp,
2837 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len);
2838 break;
2839
2840 case SIOCGHWADDR:
2841 error = if_gethwaddr(ifp, ifr);
2842 break;
2843
2844 case SIOCAIFGROUP:
2845 error = priv_check(td, PRIV_NET_ADDIFGROUP);
2846 if (error)
2847 return (error);
2848 error = if_addgroup(ifp,
2849 ((struct ifgroupreq *)data)->ifgr_group);
2850 if (error != 0)
2851 return (error);
2852 break;
2853
2854 case SIOCGIFGROUP:
2855 {
2856 struct epoch_tracker et;
2857
2858 NET_EPOCH_ENTER(et);
2859 error = if_getgroup((struct ifgroupreq *)data, ifp);
2860 NET_EPOCH_EXIT(et);
2861 break;
2862 }
2863
2864 case SIOCDIFGROUP:
2865 error = priv_check(td, PRIV_NET_DELIFGROUP);
2866 if (error)
2867 return (error);
2868 error = if_delgroup(ifp,
2869 ((struct ifgroupreq *)data)->ifgr_group);
2870 if (error != 0)
2871 return (error);
2872 break;
2873
2874 default:
2875 error = ENOIOCTL;
2876 break;
2877 }
2878 return (error);
2879 }
2880
2881 /*
2882 * Interface ioctls.
2883 */
2884 int
ifioctl(struct socket * so,u_long cmd,caddr_t data,struct thread * td)2885 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td)
2886 {
2887 #ifdef COMPAT_FREEBSD32
2888 union {
2889 struct ifconf ifc;
2890 struct ifdrv ifd;
2891 struct ifgroupreq ifgr;
2892 struct ifmediareq ifmr;
2893 } thunk;
2894 u_long saved_cmd;
2895 struct ifconf32 *ifc32;
2896 struct ifdrv32 *ifd32;
2897 struct ifgroupreq32 *ifgr32;
2898 struct ifmediareq32 *ifmr32;
2899 #endif
2900 struct ifnet *ifp;
2901 struct ifreq *ifr;
2902 int error;
2903 int oif_flags;
2904 #ifdef VIMAGE
2905 bool shutdown;
2906 #endif
2907
2908 CURVNET_SET(so->so_vnet);
2909 #ifdef VIMAGE
2910 /* Make sure the VNET is stable. */
2911 shutdown = VNET_IS_SHUTTING_DOWN(so->so_vnet);
2912 if (shutdown) {
2913 CURVNET_RESTORE();
2914 return (EBUSY);
2915 }
2916 #endif
2917
2918 #ifdef COMPAT_FREEBSD32
2919 saved_cmd = cmd;
2920 switch (cmd) {
2921 case SIOCGIFCONF32:
2922 ifc32 = (struct ifconf32 *)data;
2923 thunk.ifc.ifc_len = ifc32->ifc_len;
2924 thunk.ifc.ifc_buf = PTRIN(ifc32->ifc_buf);
2925 data = (caddr_t)&thunk.ifc;
2926 cmd = SIOCGIFCONF;
2927 break;
2928 case SIOCGDRVSPEC32:
2929 case SIOCSDRVSPEC32:
2930 ifd32 = (struct ifdrv32 *)data;
2931 memcpy(thunk.ifd.ifd_name, ifd32->ifd_name,
2932 sizeof(thunk.ifd.ifd_name));
2933 thunk.ifd.ifd_cmd = ifd32->ifd_cmd;
2934 thunk.ifd.ifd_len = ifd32->ifd_len;
2935 thunk.ifd.ifd_data = PTRIN(ifd32->ifd_data);
2936 data = (caddr_t)&thunk.ifd;
2937 cmd = _IOC_NEWTYPE(cmd, struct ifdrv);
2938 break;
2939 case SIOCAIFGROUP32:
2940 case SIOCGIFGROUP32:
2941 case SIOCDIFGROUP32:
2942 case SIOCGIFGMEMB32:
2943 ifgr32 = (struct ifgroupreq32 *)data;
2944 memcpy(thunk.ifgr.ifgr_name, ifgr32->ifgr_name,
2945 sizeof(thunk.ifgr.ifgr_name));
2946 thunk.ifgr.ifgr_len = ifgr32->ifgr_len;
2947 switch (cmd) {
2948 case SIOCAIFGROUP32:
2949 case SIOCDIFGROUP32:
2950 memcpy(thunk.ifgr.ifgr_group, ifgr32->ifgr_group,
2951 sizeof(thunk.ifgr.ifgr_group));
2952 break;
2953 case SIOCGIFGROUP32:
2954 case SIOCGIFGMEMB32:
2955 thunk.ifgr.ifgr_groups = PTRIN(ifgr32->ifgr_groups);
2956 break;
2957 }
2958 data = (caddr_t)&thunk.ifgr;
2959 cmd = _IOC_NEWTYPE(cmd, struct ifgroupreq);
2960 break;
2961 case SIOCGIFMEDIA32:
2962 case SIOCGIFXMEDIA32:
2963 ifmr32 = (struct ifmediareq32 *)data;
2964 memcpy(thunk.ifmr.ifm_name, ifmr32->ifm_name,
2965 sizeof(thunk.ifmr.ifm_name));
2966 thunk.ifmr.ifm_current = ifmr32->ifm_current;
2967 thunk.ifmr.ifm_mask = ifmr32->ifm_mask;
2968 thunk.ifmr.ifm_status = ifmr32->ifm_status;
2969 thunk.ifmr.ifm_active = ifmr32->ifm_active;
2970 thunk.ifmr.ifm_count = ifmr32->ifm_count;
2971 thunk.ifmr.ifm_ulist = PTRIN(ifmr32->ifm_ulist);
2972 data = (caddr_t)&thunk.ifmr;
2973 cmd = _IOC_NEWTYPE(cmd, struct ifmediareq);
2974 break;
2975 }
2976 #endif
2977
2978 switch (cmd) {
2979 case SIOCGIFCONF:
2980 error = ifconf(cmd, data);
2981 goto out_noref;
2982 }
2983
2984 ifr = (struct ifreq *)data;
2985 switch (cmd) {
2986 #ifdef VIMAGE
2987 case SIOCSIFRVNET:
2988 error = priv_check(td, PRIV_NET_SETIFVNET);
2989 if (error == 0)
2990 error = if_vmove_reclaim(td, ifr->ifr_name,
2991 ifr->ifr_jid);
2992 goto out_noref;
2993 #endif
2994 case SIOCIFCREATE:
2995 case SIOCIFCREATE2:
2996 error = priv_check(td, PRIV_NET_IFCREATE);
2997 if (error == 0)
2998 error = if_clone_create(ifr->ifr_name,
2999 sizeof(ifr->ifr_name), cmd == SIOCIFCREATE2 ?
3000 ifr_data_get_ptr(ifr) : NULL);
3001 goto out_noref;
3002 case SIOCIFDESTROY:
3003 error = priv_check(td, PRIV_NET_IFDESTROY);
3004
3005 if (error == 0) {
3006 sx_xlock(&ifnet_detach_sxlock);
3007 error = if_clone_destroy(ifr->ifr_name);
3008 sx_xunlock(&ifnet_detach_sxlock);
3009 }
3010 goto out_noref;
3011
3012 case SIOCIFGCLONERS:
3013 error = if_clone_list((struct if_clonereq *)data);
3014 goto out_noref;
3015
3016 case SIOCGIFGMEMB:
3017 error = if_getgroupmembers((struct ifgroupreq *)data);
3018 goto out_noref;
3019
3020 #if defined(INET) || defined(INET6)
3021 case SIOCSVH:
3022 case SIOCGVH:
3023 if (carp_ioctl_p == NULL)
3024 error = EPROTONOSUPPORT;
3025 else
3026 error = (*carp_ioctl_p)(ifr, cmd, td);
3027 goto out_noref;
3028 #endif
3029 }
3030
3031 ifp = ifunit_ref(ifr->ifr_name);
3032 if (ifp == NULL) {
3033 error = ENXIO;
3034 goto out_noref;
3035 }
3036
3037 error = ifhwioctl(cmd, ifp, data, td);
3038 if (error != ENOIOCTL)
3039 goto out_ref;
3040
3041 oif_flags = ifp->if_flags;
3042 if (so->so_proto == NULL) {
3043 error = EOPNOTSUPP;
3044 goto out_ref;
3045 }
3046
3047 /*
3048 * Pass the request on to the socket control method, and if the
3049 * latter returns EOPNOTSUPP, directly to the interface.
3050 *
3051 * Make an exception for the legacy SIOCSIF* requests. Drivers
3052 * trust SIOCSIFADDR et al to come from an already privileged
3053 * layer, and do not perform any credentials checks or input
3054 * validation.
3055 */
3056 error = so->so_proto->pr_control(so, cmd, data, ifp, td);
3057 if (error == EOPNOTSUPP && ifp != NULL && ifp->if_ioctl != NULL &&
3058 cmd != SIOCSIFADDR && cmd != SIOCSIFBRDADDR &&
3059 cmd != SIOCSIFDSTADDR && cmd != SIOCSIFNETMASK)
3060 error = (*ifp->if_ioctl)(ifp, cmd, data);
3061
3062 if (!(oif_flags & IFF_UP) && (ifp->if_flags & IFF_UP))
3063 if_up(ifp);
3064 out_ref:
3065 if_rele(ifp);
3066 out_noref:
3067 CURVNET_RESTORE();
3068 #ifdef COMPAT_FREEBSD32
3069 if (error != 0)
3070 return (error);
3071 switch (saved_cmd) {
3072 case SIOCGIFCONF32:
3073 ifc32->ifc_len = thunk.ifc.ifc_len;
3074 break;
3075 case SIOCGDRVSPEC32:
3076 /*
3077 * SIOCGDRVSPEC is IOWR, but nothing actually touches
3078 * the struct so just assert that ifd_len (the only
3079 * field it might make sense to update) hasn't
3080 * changed.
3081 */
3082 KASSERT(thunk.ifd.ifd_len == ifd32->ifd_len,
3083 ("ifd_len was updated %u -> %zu", ifd32->ifd_len,
3084 thunk.ifd.ifd_len));
3085 break;
3086 case SIOCGIFGROUP32:
3087 case SIOCGIFGMEMB32:
3088 ifgr32->ifgr_len = thunk.ifgr.ifgr_len;
3089 break;
3090 case SIOCGIFMEDIA32:
3091 case SIOCGIFXMEDIA32:
3092 ifmr32->ifm_current = thunk.ifmr.ifm_current;
3093 ifmr32->ifm_mask = thunk.ifmr.ifm_mask;
3094 ifmr32->ifm_status = thunk.ifmr.ifm_status;
3095 ifmr32->ifm_active = thunk.ifmr.ifm_active;
3096 ifmr32->ifm_count = thunk.ifmr.ifm_count;
3097 break;
3098 }
3099 #endif
3100 return (error);
3101 }
3102
3103 int
if_rename(struct ifnet * ifp,char * new_name)3104 if_rename(struct ifnet *ifp, char *new_name)
3105 {
3106 struct ifaddr *ifa;
3107 struct sockaddr_dl *sdl;
3108 size_t namelen, onamelen;
3109 char old_name[IFNAMSIZ];
3110 char strbuf[IFNAMSIZ + 8];
3111
3112 if (new_name[0] == '\0')
3113 return (EINVAL);
3114 if (strcmp(new_name, ifp->if_xname) == 0)
3115 return (0);
3116 if (ifunit(new_name) != NULL)
3117 return (EEXIST);
3118
3119 /*
3120 * XXX: Locking. Nothing else seems to lock if_flags,
3121 * and there are numerous other races with the
3122 * ifunit() checks not being atomic with namespace
3123 * changes (renames, vmoves, if_attach, etc).
3124 */
3125 ifp->if_flags |= IFF_RENAMING;
3126
3127 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
3128
3129 if_printf(ifp, "changing name to '%s'\n", new_name);
3130
3131 IF_ADDR_WLOCK(ifp);
3132 strlcpy(old_name, ifp->if_xname, sizeof(old_name));
3133 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname));
3134 ifa = ifp->if_addr;
3135 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
3136 namelen = strlen(new_name);
3137 onamelen = sdl->sdl_nlen;
3138 /*
3139 * Move the address if needed. This is safe because we
3140 * allocate space for a name of length IFNAMSIZ when we
3141 * create this in if_attach().
3142 */
3143 if (namelen != onamelen) {
3144 bcopy(sdl->sdl_data + onamelen,
3145 sdl->sdl_data + namelen, sdl->sdl_alen);
3146 }
3147 bcopy(new_name, sdl->sdl_data, namelen);
3148 sdl->sdl_nlen = namelen;
3149 sdl = (struct sockaddr_dl *)ifa->ifa_netmask;
3150 bzero(sdl->sdl_data, onamelen);
3151 while (namelen != 0)
3152 sdl->sdl_data[--namelen] = 0xff;
3153 IF_ADDR_WUNLOCK(ifp);
3154
3155 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
3156
3157 ifp->if_flags &= ~IFF_RENAMING;
3158
3159 snprintf(strbuf, sizeof(strbuf), "name=%s", new_name);
3160 devctl_notify("IFNET", old_name, "RENAME", strbuf);
3161
3162 return (0);
3163 }
3164
3165 /*
3166 * The code common to handling reference counted flags,
3167 * e.g., in ifpromisc() and if_allmulti().
3168 * The "pflag" argument can specify a permanent mode flag to check,
3169 * such as IFF_PPROMISC for promiscuous mode; should be 0 if none.
3170 *
3171 * Only to be used on stack-owned flags, not driver-owned flags.
3172 */
3173 static int
if_setflag(struct ifnet * ifp,int flag,int pflag,int * refcount,int onswitch)3174 if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch)
3175 {
3176 struct ifreq ifr;
3177 int error;
3178 int oldflags, oldcount;
3179
3180 /* Sanity checks to catch programming errors */
3181 KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0,
3182 ("%s: setting driver-owned flag %d", __func__, flag));
3183
3184 if (onswitch)
3185 KASSERT(*refcount >= 0,
3186 ("%s: increment negative refcount %d for flag %d",
3187 __func__, *refcount, flag));
3188 else
3189 KASSERT(*refcount > 0,
3190 ("%s: decrement non-positive refcount %d for flag %d",
3191 __func__, *refcount, flag));
3192
3193 /* In case this mode is permanent, just touch refcount */
3194 if (ifp->if_flags & pflag) {
3195 *refcount += onswitch ? 1 : -1;
3196 return (0);
3197 }
3198
3199 /* Save ifnet parameters for if_ioctl() may fail */
3200 oldcount = *refcount;
3201 oldflags = ifp->if_flags;
3202
3203 /*
3204 * See if we aren't the only and touching refcount is enough.
3205 * Actually toggle interface flag if we are the first or last.
3206 */
3207 if (onswitch) {
3208 if ((*refcount)++)
3209 return (0);
3210 ifp->if_flags |= flag;
3211 } else {
3212 if (--(*refcount))
3213 return (0);
3214 ifp->if_flags &= ~flag;
3215 }
3216
3217 /* Call down the driver since we've changed interface flags */
3218 if (ifp->if_ioctl == NULL) {
3219 error = EOPNOTSUPP;
3220 goto recover;
3221 }
3222 ifr.ifr_flags = ifp->if_flags & 0xffff;
3223 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3224 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3225 if (error)
3226 goto recover;
3227 /* Notify userland that interface flags have changed */
3228 rt_ifmsg(ifp, flag);
3229 return (0);
3230
3231 recover:
3232 /* Recover after driver error */
3233 *refcount = oldcount;
3234 ifp->if_flags = oldflags;
3235 return (error);
3236 }
3237
3238 /*
3239 * Set/clear promiscuous mode on interface ifp based on the truth value
3240 * of pswitch. The calls are reference counted so that only the first
3241 * "on" request actually has an effect, as does the final "off" request.
3242 * Results are undefined if the "off" and "on" requests are not matched.
3243 */
3244 int
ifpromisc(struct ifnet * ifp,int pswitch)3245 ifpromisc(struct ifnet *ifp, int pswitch)
3246 {
3247 int error;
3248 int oldflags = ifp->if_flags;
3249
3250 error = if_setflag(ifp, IFF_PROMISC, IFF_PPROMISC,
3251 &ifp->if_pcount, pswitch);
3252 /* If promiscuous mode status has changed, log a message */
3253 if (error == 0 && ((ifp->if_flags ^ oldflags) & IFF_PROMISC) &&
3254 log_promisc_mode_change)
3255 if_printf(ifp, "promiscuous mode %s\n",
3256 (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled");
3257 return (error);
3258 }
3259
3260 /*
3261 * Return interface configuration
3262 * of system. List may be used
3263 * in later ioctl's (above) to get
3264 * other information.
3265 */
3266 /*ARGSUSED*/
3267 static int
ifconf(u_long cmd,caddr_t data)3268 ifconf(u_long cmd, caddr_t data)
3269 {
3270 struct ifconf *ifc = (struct ifconf *)data;
3271 struct ifnet *ifp;
3272 struct ifaddr *ifa;
3273 struct ifreq ifr;
3274 struct sbuf *sb;
3275 int error, full = 0, valid_len, max_len;
3276
3277 /* Limit initial buffer size to maxphys to avoid DoS from userspace. */
3278 max_len = maxphys - 1;
3279
3280 /* Prevent hostile input from being able to crash the system */
3281 if (ifc->ifc_len <= 0)
3282 return (EINVAL);
3283
3284 again:
3285 if (ifc->ifc_len <= max_len) {
3286 max_len = ifc->ifc_len;
3287 full = 1;
3288 }
3289 sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN);
3290 max_len = 0;
3291 valid_len = 0;
3292
3293 IFNET_RLOCK();
3294 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
3295 struct epoch_tracker et;
3296 int addrs;
3297
3298 /*
3299 * Zero the ifr to make sure we don't disclose the contents
3300 * of the stack.
3301 */
3302 memset(&ifr, 0, sizeof(ifr));
3303
3304 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name))
3305 >= sizeof(ifr.ifr_name)) {
3306 sbuf_delete(sb);
3307 IFNET_RUNLOCK();
3308 return (ENAMETOOLONG);
3309 }
3310
3311 addrs = 0;
3312 NET_EPOCH_ENTER(et);
3313 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
3314 struct sockaddr *sa = ifa->ifa_addr;
3315
3316 if (prison_if(curthread->td_ucred, sa) != 0)
3317 continue;
3318 addrs++;
3319 if (sa->sa_len <= sizeof(*sa)) {
3320 if (sa->sa_len < sizeof(*sa)) {
3321 memset(&ifr.ifr_ifru.ifru_addr, 0,
3322 sizeof(ifr.ifr_ifru.ifru_addr));
3323 memcpy(&ifr.ifr_ifru.ifru_addr, sa,
3324 sa->sa_len);
3325 } else
3326 ifr.ifr_ifru.ifru_addr = *sa;
3327 sbuf_bcat(sb, &ifr, sizeof(ifr));
3328 max_len += sizeof(ifr);
3329 } else {
3330 sbuf_bcat(sb, &ifr,
3331 offsetof(struct ifreq, ifr_addr));
3332 max_len += offsetof(struct ifreq, ifr_addr);
3333 sbuf_bcat(sb, sa, sa->sa_len);
3334 max_len += sa->sa_len;
3335 }
3336
3337 if (sbuf_error(sb) == 0)
3338 valid_len = sbuf_len(sb);
3339 }
3340 NET_EPOCH_EXIT(et);
3341 if (addrs == 0) {
3342 sbuf_bcat(sb, &ifr, sizeof(ifr));
3343 max_len += sizeof(ifr);
3344
3345 if (sbuf_error(sb) == 0)
3346 valid_len = sbuf_len(sb);
3347 }
3348 }
3349 IFNET_RUNLOCK();
3350
3351 /*
3352 * If we didn't allocate enough space (uncommon), try again. If
3353 * we have already allocated as much space as we are allowed,
3354 * return what we've got.
3355 */
3356 if (valid_len != max_len && !full) {
3357 sbuf_delete(sb);
3358 goto again;
3359 }
3360
3361 ifc->ifc_len = valid_len;
3362 sbuf_finish(sb);
3363 error = copyout(sbuf_data(sb), ifc->ifc_req, ifc->ifc_len);
3364 sbuf_delete(sb);
3365 return (error);
3366 }
3367
3368 /*
3369 * Just like ifpromisc(), but for all-multicast-reception mode.
3370 */
3371 int
if_allmulti(struct ifnet * ifp,int onswitch)3372 if_allmulti(struct ifnet *ifp, int onswitch)
3373 {
3374
3375 return (if_setflag(ifp, IFF_ALLMULTI, IFF_PALLMULTI, &ifp->if_amcount,
3376 onswitch));
3377 }
3378
3379 struct ifmultiaddr *
if_findmulti(struct ifnet * ifp,const struct sockaddr * sa)3380 if_findmulti(struct ifnet *ifp, const struct sockaddr *sa)
3381 {
3382 struct ifmultiaddr *ifma;
3383
3384 IF_ADDR_LOCK_ASSERT(ifp);
3385
3386 CK_STAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
3387 if (sa->sa_family == AF_LINK) {
3388 if (sa_dl_equal(ifma->ifma_addr, sa))
3389 break;
3390 } else {
3391 if (sa_equal(ifma->ifma_addr, sa))
3392 break;
3393 }
3394 }
3395
3396 return ifma;
3397 }
3398
3399 /*
3400 * Allocate a new ifmultiaddr and initialize based on passed arguments. We
3401 * make copies of passed sockaddrs. The ifmultiaddr will not be added to
3402 * the ifnet multicast address list here, so the caller must do that and
3403 * other setup work (such as notifying the device driver). The reference
3404 * count is initialized to 1.
3405 */
3406 static struct ifmultiaddr *
if_allocmulti(struct ifnet * ifp,struct sockaddr * sa,struct sockaddr * llsa,int mflags)3407 if_allocmulti(struct ifnet *ifp, struct sockaddr *sa, struct sockaddr *llsa,
3408 int mflags)
3409 {
3410 struct ifmultiaddr *ifma;
3411 struct sockaddr *dupsa;
3412
3413 ifma = malloc(sizeof *ifma, M_IFMADDR, mflags |
3414 M_ZERO);
3415 if (ifma == NULL)
3416 return (NULL);
3417
3418 dupsa = malloc(sa->sa_len, M_IFMADDR, mflags);
3419 if (dupsa == NULL) {
3420 free(ifma, M_IFMADDR);
3421 return (NULL);
3422 }
3423 bcopy(sa, dupsa, sa->sa_len);
3424 ifma->ifma_addr = dupsa;
3425
3426 ifma->ifma_ifp = ifp;
3427 ifma->ifma_refcount = 1;
3428 ifma->ifma_protospec = NULL;
3429
3430 if (llsa == NULL) {
3431 ifma->ifma_lladdr = NULL;
3432 return (ifma);
3433 }
3434
3435 dupsa = malloc(llsa->sa_len, M_IFMADDR, mflags);
3436 if (dupsa == NULL) {
3437 free(ifma->ifma_addr, M_IFMADDR);
3438 free(ifma, M_IFMADDR);
3439 return (NULL);
3440 }
3441 bcopy(llsa, dupsa, llsa->sa_len);
3442 ifma->ifma_lladdr = dupsa;
3443
3444 return (ifma);
3445 }
3446
3447 /*
3448 * if_freemulti: free ifmultiaddr structure and possibly attached related
3449 * addresses. The caller is responsible for implementing reference
3450 * counting, notifying the driver, handling routing messages, and releasing
3451 * any dependent link layer state.
3452 */
3453 #ifdef MCAST_VERBOSE
3454 extern void kdb_backtrace(void);
3455 #endif
3456 static void
if_freemulti_internal(struct ifmultiaddr * ifma)3457 if_freemulti_internal(struct ifmultiaddr *ifma)
3458 {
3459
3460 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti: refcount %d",
3461 ifma->ifma_refcount));
3462
3463 if (ifma->ifma_lladdr != NULL)
3464 free(ifma->ifma_lladdr, M_IFMADDR);
3465 #ifdef MCAST_VERBOSE
3466 kdb_backtrace();
3467 printf("%s freeing ifma: %p\n", __func__, ifma);
3468 #endif
3469 free(ifma->ifma_addr, M_IFMADDR);
3470 free(ifma, M_IFMADDR);
3471 }
3472
3473 static void
if_destroymulti(epoch_context_t ctx)3474 if_destroymulti(epoch_context_t ctx)
3475 {
3476 struct ifmultiaddr *ifma;
3477
3478 ifma = __containerof(ctx, struct ifmultiaddr, ifma_epoch_ctx);
3479 if_freemulti_internal(ifma);
3480 }
3481
3482 void
if_freemulti(struct ifmultiaddr * ifma)3483 if_freemulti(struct ifmultiaddr *ifma)
3484 {
3485 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti_epoch: refcount %d",
3486 ifma->ifma_refcount));
3487
3488 NET_EPOCH_CALL(if_destroymulti, &ifma->ifma_epoch_ctx);
3489 }
3490
3491 /*
3492 * Register an additional multicast address with a network interface.
3493 *
3494 * - If the address is already present, bump the reference count on the
3495 * address and return.
3496 * - If the address is not link-layer, look up a link layer address.
3497 * - Allocate address structures for one or both addresses, and attach to the
3498 * multicast address list on the interface. If automatically adding a link
3499 * layer address, the protocol address will own a reference to the link
3500 * layer address, to be freed when it is freed.
3501 * - Notify the network device driver of an addition to the multicast address
3502 * list.
3503 *
3504 * 'sa' points to caller-owned memory with the desired multicast address.
3505 *
3506 * 'retifma' will be used to return a pointer to the resulting multicast
3507 * address reference, if desired.
3508 */
3509 int
if_addmulti(struct ifnet * ifp,struct sockaddr * sa,struct ifmultiaddr ** retifma)3510 if_addmulti(struct ifnet *ifp, struct sockaddr *sa,
3511 struct ifmultiaddr **retifma)
3512 {
3513 struct ifmultiaddr *ifma, *ll_ifma;
3514 struct sockaddr *llsa;
3515 struct sockaddr_dl sdl;
3516 int error;
3517
3518 #ifdef INET
3519 IN_MULTI_LIST_UNLOCK_ASSERT();
3520 #endif
3521 #ifdef INET6
3522 IN6_MULTI_LIST_UNLOCK_ASSERT();
3523 #endif
3524 /*
3525 * If the address is already present, return a new reference to it;
3526 * otherwise, allocate storage and set up a new address.
3527 */
3528 IF_ADDR_WLOCK(ifp);
3529 ifma = if_findmulti(ifp, sa);
3530 if (ifma != NULL) {
3531 ifma->ifma_refcount++;
3532 if (retifma != NULL)
3533 *retifma = ifma;
3534 IF_ADDR_WUNLOCK(ifp);
3535 return (0);
3536 }
3537
3538 /*
3539 * The address isn't already present; resolve the protocol address
3540 * into a link layer address, and then look that up, bump its
3541 * refcount or allocate an ifma for that also.
3542 * Most link layer resolving functions returns address data which
3543 * fits inside default sockaddr_dl structure. However callback
3544 * can allocate another sockaddr structure, in that case we need to
3545 * free it later.
3546 */
3547 llsa = NULL;
3548 ll_ifma = NULL;
3549 if (ifp->if_resolvemulti != NULL) {
3550 /* Provide called function with buffer size information */
3551 sdl.sdl_len = sizeof(sdl);
3552 llsa = (struct sockaddr *)&sdl;
3553 error = ifp->if_resolvemulti(ifp, &llsa, sa);
3554 if (error)
3555 goto unlock_out;
3556 }
3557
3558 /*
3559 * Allocate the new address. Don't hook it up yet, as we may also
3560 * need to allocate a link layer multicast address.
3561 */
3562 ifma = if_allocmulti(ifp, sa, llsa, M_NOWAIT);
3563 if (ifma == NULL) {
3564 error = ENOMEM;
3565 goto free_llsa_out;
3566 }
3567
3568 /*
3569 * If a link layer address is found, we'll need to see if it's
3570 * already present in the address list, or allocate is as well.
3571 * When this block finishes, the link layer address will be on the
3572 * list.
3573 */
3574 if (llsa != NULL) {
3575 ll_ifma = if_findmulti(ifp, llsa);
3576 if (ll_ifma == NULL) {
3577 ll_ifma = if_allocmulti(ifp, llsa, NULL, M_NOWAIT);
3578 if (ll_ifma == NULL) {
3579 --ifma->ifma_refcount;
3580 if_freemulti(ifma);
3581 error = ENOMEM;
3582 goto free_llsa_out;
3583 }
3584 ll_ifma->ifma_flags |= IFMA_F_ENQUEUED;
3585 CK_STAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ll_ifma,
3586 ifma_link);
3587 } else
3588 ll_ifma->ifma_refcount++;
3589 ifma->ifma_llifma = ll_ifma;
3590 }
3591
3592 /*
3593 * We now have a new multicast address, ifma, and possibly a new or
3594 * referenced link layer address. Add the primary address to the
3595 * ifnet address list.
3596 */
3597 ifma->ifma_flags |= IFMA_F_ENQUEUED;
3598 CK_STAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
3599
3600 if (retifma != NULL)
3601 *retifma = ifma;
3602
3603 /*
3604 * Must generate the message while holding the lock so that 'ifma'
3605 * pointer is still valid.
3606 */
3607 rt_newmaddrmsg(RTM_NEWMADDR, ifma);
3608 IF_ADDR_WUNLOCK(ifp);
3609
3610 /*
3611 * We are certain we have added something, so call down to the
3612 * interface to let them know about it.
3613 */
3614 if (ifp->if_ioctl != NULL) {
3615 if (THREAD_CAN_SLEEP())
3616 (void )(*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0);
3617 else
3618 taskqueue_enqueue(taskqueue_swi, &ifp->if_addmultitask);
3619 }
3620
3621 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl))
3622 link_free_sdl(llsa);
3623
3624 return (0);
3625
3626 free_llsa_out:
3627 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl))
3628 link_free_sdl(llsa);
3629
3630 unlock_out:
3631 IF_ADDR_WUNLOCK(ifp);
3632 return (error);
3633 }
3634
3635 static void
if_siocaddmulti(void * arg,int pending)3636 if_siocaddmulti(void *arg, int pending)
3637 {
3638 struct ifnet *ifp;
3639
3640 ifp = arg;
3641 #ifdef DIAGNOSTIC
3642 if (pending > 1)
3643 if_printf(ifp, "%d SIOCADDMULTI coalesced\n", pending);
3644 #endif
3645 CURVNET_SET(ifp->if_vnet);
3646 (void )(*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0);
3647 CURVNET_RESTORE();
3648 }
3649
3650 /*
3651 * Delete a multicast group membership by network-layer group address.
3652 *
3653 * Returns ENOENT if the entry could not be found. If ifp no longer
3654 * exists, results are undefined. This entry point should only be used
3655 * from subsystems which do appropriate locking to hold ifp for the
3656 * duration of the call.
3657 * Network-layer protocol domains must use if_delmulti_ifma().
3658 */
3659 int
if_delmulti(struct ifnet * ifp,struct sockaddr * sa)3660 if_delmulti(struct ifnet *ifp, struct sockaddr *sa)
3661 {
3662 struct ifmultiaddr *ifma;
3663 int lastref;
3664
3665 KASSERT(ifp, ("%s: NULL ifp", __func__));
3666
3667 IF_ADDR_WLOCK(ifp);
3668 lastref = 0;
3669 ifma = if_findmulti(ifp, sa);
3670 if (ifma != NULL)
3671 lastref = if_delmulti_locked(ifp, ifma, 0);
3672 IF_ADDR_WUNLOCK(ifp);
3673
3674 if (ifma == NULL)
3675 return (ENOENT);
3676
3677 if (lastref && ifp->if_ioctl != NULL) {
3678 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
3679 }
3680
3681 return (0);
3682 }
3683
3684 /*
3685 * Delete all multicast group membership for an interface.
3686 * Should be used to quickly flush all multicast filters.
3687 */
3688 void
if_delallmulti(struct ifnet * ifp)3689 if_delallmulti(struct ifnet *ifp)
3690 {
3691 struct ifmultiaddr *ifma;
3692 struct ifmultiaddr *next;
3693
3694 IF_ADDR_WLOCK(ifp);
3695 CK_STAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next)
3696 if_delmulti_locked(ifp, ifma, 0);
3697 IF_ADDR_WUNLOCK(ifp);
3698 }
3699
3700 void
if_delmulti_ifma(struct ifmultiaddr * ifma)3701 if_delmulti_ifma(struct ifmultiaddr *ifma)
3702 {
3703 if_delmulti_ifma_flags(ifma, 0);
3704 }
3705
3706 /*
3707 * Delete a multicast group membership by group membership pointer.
3708 * Network-layer protocol domains must use this routine.
3709 *
3710 * It is safe to call this routine if the ifp disappeared.
3711 */
3712 void
if_delmulti_ifma_flags(struct ifmultiaddr * ifma,int flags)3713 if_delmulti_ifma_flags(struct ifmultiaddr *ifma, int flags)
3714 {
3715 struct ifnet *ifp;
3716 int lastref;
3717 MCDPRINTF("%s freeing ifma: %p\n", __func__, ifma);
3718 #ifdef INET
3719 IN_MULTI_LIST_UNLOCK_ASSERT();
3720 #endif
3721 ifp = ifma->ifma_ifp;
3722 #ifdef DIAGNOSTIC
3723 if (ifp == NULL) {
3724 printf("%s: ifma_ifp seems to be detached\n", __func__);
3725 } else {
3726 struct epoch_tracker et;
3727 struct ifnet *oifp;
3728
3729 NET_EPOCH_ENTER(et);
3730 CK_STAILQ_FOREACH(oifp, &V_ifnet, if_link)
3731 if (ifp == oifp)
3732 break;
3733 NET_EPOCH_EXIT(et);
3734 if (ifp != oifp)
3735 ifp = NULL;
3736 }
3737 #endif
3738 /*
3739 * If and only if the ifnet instance exists: Acquire the address lock.
3740 */
3741 if (ifp != NULL)
3742 IF_ADDR_WLOCK(ifp);
3743
3744 lastref = if_delmulti_locked(ifp, ifma, flags);
3745
3746 if (ifp != NULL) {
3747 /*
3748 * If and only if the ifnet instance exists:
3749 * Release the address lock.
3750 * If the group was left: update the hardware hash filter.
3751 */
3752 IF_ADDR_WUNLOCK(ifp);
3753 if (lastref && ifp->if_ioctl != NULL) {
3754 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
3755 }
3756 }
3757 }
3758
3759 /*
3760 * Perform deletion of network-layer and/or link-layer multicast address.
3761 *
3762 * Return 0 if the reference count was decremented.
3763 * Return 1 if the final reference was released, indicating that the
3764 * hardware hash filter should be reprogrammed.
3765 */
3766 static int
if_delmulti_locked(struct ifnet * ifp,struct ifmultiaddr * ifma,int detaching)3767 if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching)
3768 {
3769 struct ifmultiaddr *ll_ifma;
3770
3771 if (ifp != NULL && ifma->ifma_ifp != NULL) {
3772 KASSERT(ifma->ifma_ifp == ifp,
3773 ("%s: inconsistent ifp %p", __func__, ifp));
3774 IF_ADDR_WLOCK_ASSERT(ifp);
3775 }
3776
3777 ifp = ifma->ifma_ifp;
3778 MCDPRINTF("%s freeing %p from %s \n", __func__, ifma, ifp ? ifp->if_xname : "");
3779
3780 /*
3781 * If the ifnet is detaching, null out references to ifnet,
3782 * so that upper protocol layers will notice, and not attempt
3783 * to obtain locks for an ifnet which no longer exists. The
3784 * routing socket announcement must happen before the ifnet
3785 * instance is detached from the system.
3786 */
3787 if (detaching) {
3788 #ifdef DIAGNOSTIC
3789 printf("%s: detaching ifnet instance %p\n", __func__, ifp);
3790 #endif
3791 /*
3792 * ifp may already be nulled out if we are being reentered
3793 * to delete the ll_ifma.
3794 */
3795 if (ifp != NULL) {
3796 rt_newmaddrmsg(RTM_DELMADDR, ifma);
3797 ifma->ifma_ifp = NULL;
3798 }
3799 }
3800
3801 if (--ifma->ifma_refcount > 0)
3802 return 0;
3803
3804 if (ifp != NULL && detaching == 0 && (ifma->ifma_flags & IFMA_F_ENQUEUED)) {
3805 CK_STAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifmultiaddr, ifma_link);
3806 ifma->ifma_flags &= ~IFMA_F_ENQUEUED;
3807 }
3808 /*
3809 * If this ifma is a network-layer ifma, a link-layer ifma may
3810 * have been associated with it. Release it first if so.
3811 */
3812 ll_ifma = ifma->ifma_llifma;
3813 if (ll_ifma != NULL) {
3814 KASSERT(ifma->ifma_lladdr != NULL,
3815 ("%s: llifma w/o lladdr", __func__));
3816 if (detaching)
3817 ll_ifma->ifma_ifp = NULL; /* XXX */
3818 if (--ll_ifma->ifma_refcount == 0) {
3819 if (ifp != NULL) {
3820 if (ll_ifma->ifma_flags & IFMA_F_ENQUEUED) {
3821 CK_STAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma, ifmultiaddr,
3822 ifma_link);
3823 ll_ifma->ifma_flags &= ~IFMA_F_ENQUEUED;
3824 }
3825 }
3826 if_freemulti(ll_ifma);
3827 }
3828 }
3829 #ifdef INVARIANTS
3830 if (ifp) {
3831 struct ifmultiaddr *ifmatmp;
3832
3833 CK_STAILQ_FOREACH(ifmatmp, &ifp->if_multiaddrs, ifma_link)
3834 MPASS(ifma != ifmatmp);
3835 }
3836 #endif
3837 if_freemulti(ifma);
3838 /*
3839 * The last reference to this instance of struct ifmultiaddr
3840 * was released; the hardware should be notified of this change.
3841 */
3842 return 1;
3843 }
3844
3845 /*
3846 * Set the link layer address on an interface.
3847 *
3848 * At this time we only support certain types of interfaces,
3849 * and we don't allow the length of the address to change.
3850 *
3851 * Set noinline to be dtrace-friendly
3852 */
3853 __noinline int
if_setlladdr(struct ifnet * ifp,const u_char * lladdr,int len)3854 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len)
3855 {
3856 struct sockaddr_dl *sdl;
3857 struct ifaddr *ifa;
3858 struct ifreq ifr;
3859
3860 ifa = ifp->if_addr;
3861 if (ifa == NULL)
3862 return (EINVAL);
3863
3864 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
3865 if (sdl == NULL)
3866 return (EINVAL);
3867
3868 if (len != sdl->sdl_alen) /* don't allow length to change */
3869 return (EINVAL);
3870
3871 switch (ifp->if_type) {
3872 case IFT_ETHER:
3873 case IFT_XETHER:
3874 case IFT_L2VLAN:
3875 case IFT_BRIDGE:
3876 case IFT_IEEE8023ADLAG:
3877 bcopy(lladdr, LLADDR(sdl), len);
3878 break;
3879 default:
3880 return (ENODEV);
3881 }
3882
3883 /*
3884 * If the interface is already up, we need
3885 * to re-init it in order to reprogram its
3886 * address filter.
3887 */
3888 if ((ifp->if_flags & IFF_UP) != 0) {
3889 if (ifp->if_ioctl) {
3890 ifp->if_flags &= ~IFF_UP;
3891 ifr.ifr_flags = ifp->if_flags & 0xffff;
3892 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3893 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3894 ifp->if_flags |= IFF_UP;
3895 ifr.ifr_flags = ifp->if_flags & 0xffff;
3896 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3897 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3898 }
3899 }
3900 EVENTHANDLER_INVOKE(iflladdr_event, ifp);
3901
3902 return (0);
3903 }
3904
3905 /*
3906 * Compat function for handling basic encapsulation requests.
3907 * Not converted stacks (FDDI, IB, ..) supports traditional
3908 * output model: ARP (and other similar L2 protocols) are handled
3909 * inside output routine, arpresolve/nd6_resolve() returns MAC
3910 * address instead of full prepend.
3911 *
3912 * This function creates calculated header==MAC for IPv4/IPv6 and
3913 * returns EAFNOSUPPORT (which is then handled in ARP code) for other
3914 * address families.
3915 */
3916 static int
if_requestencap_default(struct ifnet * ifp,struct if_encap_req * req)3917 if_requestencap_default(struct ifnet *ifp, struct if_encap_req *req)
3918 {
3919 if (req->rtype != IFENCAP_LL)
3920 return (EOPNOTSUPP);
3921
3922 if (req->bufsize < req->lladdr_len)
3923 return (ENOMEM);
3924
3925 switch (req->family) {
3926 case AF_INET:
3927 case AF_INET6:
3928 break;
3929 default:
3930 return (EAFNOSUPPORT);
3931 }
3932
3933 /* Copy lladdr to storage as is */
3934 memmove(req->buf, req->lladdr, req->lladdr_len);
3935 req->bufsize = req->lladdr_len;
3936 req->lladdr_off = 0;
3937
3938 return (0);
3939 }
3940
3941 /*
3942 * Tunnel interfaces can nest, also they may cause infinite recursion
3943 * calls when misconfigured. We'll prevent this by detecting loops.
3944 * High nesting level may cause stack exhaustion. We'll prevent this
3945 * by introducing upper limit.
3946 *
3947 * Return 0, if tunnel nesting count is equal or less than limit.
3948 */
3949 int
if_tunnel_check_nesting(struct ifnet * ifp,struct mbuf * m,uint32_t cookie,int limit)3950 if_tunnel_check_nesting(struct ifnet *ifp, struct mbuf *m, uint32_t cookie,
3951 int limit)
3952 {
3953 struct m_tag *mtag;
3954 int count;
3955
3956 count = 1;
3957 mtag = NULL;
3958 while ((mtag = m_tag_locate(m, cookie, 0, mtag)) != NULL) {
3959 if (*(struct ifnet **)(mtag + 1) == ifp) {
3960 log(LOG_NOTICE, "%s: loop detected\n", if_name(ifp));
3961 return (EIO);
3962 }
3963 count++;
3964 }
3965 if (count > limit) {
3966 log(LOG_NOTICE,
3967 "%s: if_output recursively called too many times(%d)\n",
3968 if_name(ifp), count);
3969 return (EIO);
3970 }
3971 mtag = m_tag_alloc(cookie, 0, sizeof(struct ifnet *), M_NOWAIT);
3972 if (mtag == NULL)
3973 return (ENOMEM);
3974 *(struct ifnet **)(mtag + 1) = ifp;
3975 m_tag_prepend(m, mtag);
3976 return (0);
3977 }
3978
3979 /*
3980 * Get the link layer address that was read from the hardware at attach.
3981 *
3982 * This is only set by Ethernet NICs (IFT_ETHER), but laggX interfaces re-type
3983 * their component interfaces as IFT_IEEE8023ADLAG.
3984 */
3985 int
if_gethwaddr(struct ifnet * ifp,struct ifreq * ifr)3986 if_gethwaddr(struct ifnet *ifp, struct ifreq *ifr)
3987 {
3988 if (ifp->if_hw_addr == NULL)
3989 return (ENODEV);
3990
3991 switch (ifp->if_type) {
3992 case IFT_ETHER:
3993 case IFT_IEEE8023ADLAG:
3994 bcopy(ifp->if_hw_addr, ifr->ifr_addr.sa_data, ifp->if_addrlen);
3995 return (0);
3996 default:
3997 return (ENODEV);
3998 }
3999 }
4000
4001 /*
4002 * The name argument must be a pointer to storage which will last as
4003 * long as the interface does. For physical devices, the result of
4004 * device_get_name(dev) is a good choice and for pseudo-devices a
4005 * static string works well.
4006 */
4007 void
if_initname(struct ifnet * ifp,const char * name,int unit)4008 if_initname(struct ifnet *ifp, const char *name, int unit)
4009 {
4010 ifp->if_dname = name;
4011 ifp->if_dunit = unit;
4012 if (unit != IF_DUNIT_NONE)
4013 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit);
4014 else
4015 strlcpy(ifp->if_xname, name, IFNAMSIZ);
4016 }
4017
4018 static int
if_vlog(struct ifnet * ifp,int pri,const char * fmt,va_list ap)4019 if_vlog(struct ifnet *ifp, int pri, const char *fmt, va_list ap)
4020 {
4021 char if_fmt[256];
4022
4023 snprintf(if_fmt, sizeof(if_fmt), "%s: %s", ifp->if_xname, fmt);
4024 vlog(pri, if_fmt, ap);
4025 return (0);
4026 }
4027
4028
4029 int
if_printf(struct ifnet * ifp,const char * fmt,...)4030 if_printf(struct ifnet *ifp, const char *fmt, ...)
4031 {
4032 va_list ap;
4033
4034 va_start(ap, fmt);
4035 if_vlog(ifp, LOG_INFO, fmt, ap);
4036 va_end(ap);
4037 return (0);
4038 }
4039
4040 int
if_log(struct ifnet * ifp,int pri,const char * fmt,...)4041 if_log(struct ifnet *ifp, int pri, const char *fmt, ...)
4042 {
4043 va_list ap;
4044
4045 va_start(ap, fmt);
4046 if_vlog(ifp, pri, fmt, ap);
4047 va_end(ap);
4048 return (0);
4049 }
4050
4051 void
if_start(struct ifnet * ifp)4052 if_start(struct ifnet *ifp)
4053 {
4054
4055 (*(ifp)->if_start)(ifp);
4056 }
4057
4058 /*
4059 * Backwards compatibility interface for drivers
4060 * that have not implemented it
4061 */
4062 static int
if_transmit_default(struct ifnet * ifp,struct mbuf * m)4063 if_transmit_default(struct ifnet *ifp, struct mbuf *m)
4064 {
4065 int error;
4066
4067 IFQ_HANDOFF(ifp, m, error);
4068 return (error);
4069 }
4070
4071 static void
if_input_default(struct ifnet * ifp __unused,struct mbuf * m)4072 if_input_default(struct ifnet *ifp __unused, struct mbuf *m)
4073 {
4074 m_freem(m);
4075 }
4076
4077 int
if_handoff(struct ifqueue * ifq,struct mbuf * m,struct ifnet * ifp,int adjust)4078 if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust)
4079 {
4080 int active = 0;
4081
4082 IF_LOCK(ifq);
4083 if (_IF_QFULL(ifq)) {
4084 IF_UNLOCK(ifq);
4085 if_inc_counter(ifp, IFCOUNTER_OQDROPS, 1);
4086 m_freem(m);
4087 return (0);
4088 }
4089 if (ifp != NULL) {
4090 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len + adjust);
4091 if (m->m_flags & (M_BCAST|M_MCAST))
4092 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1);
4093 active = ifp->if_drv_flags & IFF_DRV_OACTIVE;
4094 }
4095 _IF_ENQUEUE(ifq, m);
4096 IF_UNLOCK(ifq);
4097 if (ifp != NULL && !active)
4098 (*(ifp)->if_start)(ifp);
4099 return (1);
4100 }
4101
4102 void
if_register_com_alloc(u_char type,if_com_alloc_t * a,if_com_free_t * f)4103 if_register_com_alloc(u_char type,
4104 if_com_alloc_t *a, if_com_free_t *f)
4105 {
4106
4107 KASSERT(if_com_alloc[type] == NULL,
4108 ("if_register_com_alloc: %d already registered", type));
4109 KASSERT(if_com_free[type] == NULL,
4110 ("if_register_com_alloc: %d free already registered", type));
4111
4112 if_com_alloc[type] = a;
4113 if_com_free[type] = f;
4114 }
4115
4116 void
if_deregister_com_alloc(u_char type)4117 if_deregister_com_alloc(u_char type)
4118 {
4119
4120 KASSERT(if_com_alloc[type] != NULL,
4121 ("if_deregister_com_alloc: %d not registered", type));
4122 KASSERT(if_com_free[type] != NULL,
4123 ("if_deregister_com_alloc: %d free not registered", type));
4124
4125 /*
4126 * Ensure all pending EPOCH(9) callbacks have been executed. This
4127 * fixes issues about late invocation of if_destroy(), which leads
4128 * to memory leak from if_com_alloc[type] allocated if_l2com.
4129 */
4130 NET_EPOCH_DRAIN_CALLBACKS();
4131
4132 if_com_alloc[type] = NULL;
4133 if_com_free[type] = NULL;
4134 }
4135
4136 /* API for driver access to network stack owned ifnet.*/
4137 uint64_t
if_setbaudrate(struct ifnet * ifp,uint64_t baudrate)4138 if_setbaudrate(struct ifnet *ifp, uint64_t baudrate)
4139 {
4140 uint64_t oldbrate;
4141
4142 oldbrate = ifp->if_baudrate;
4143 ifp->if_baudrate = baudrate;
4144 return (oldbrate);
4145 }
4146
4147 uint64_t
if_getbaudrate(const if_t ifp)4148 if_getbaudrate(const if_t ifp)
4149 {
4150 return (ifp->if_baudrate);
4151 }
4152
4153 int
if_setcapabilities(if_t ifp,int capabilities)4154 if_setcapabilities(if_t ifp, int capabilities)
4155 {
4156 ifp->if_capabilities = capabilities;
4157 return (0);
4158 }
4159
4160 int
if_setcapabilitiesbit(if_t ifp,int setbit,int clearbit)4161 if_setcapabilitiesbit(if_t ifp, int setbit, int clearbit)
4162 {
4163 ifp->if_capabilities &= ~clearbit;
4164 ifp->if_capabilities |= setbit;
4165 return (0);
4166 }
4167
4168 int
if_getcapabilities(const if_t ifp)4169 if_getcapabilities(const if_t ifp)
4170 {
4171 return (ifp->if_capabilities);
4172 }
4173
4174 int
if_setcapenable(if_t ifp,int capabilities)4175 if_setcapenable(if_t ifp, int capabilities)
4176 {
4177 ifp->if_capenable = capabilities;
4178 return (0);
4179 }
4180
4181 int
if_setcapenablebit(if_t ifp,int setcap,int clearcap)4182 if_setcapenablebit(if_t ifp, int setcap, int clearcap)
4183 {
4184 ifp->if_capenable &= ~clearcap;
4185 ifp->if_capenable |= setcap;
4186 return (0);
4187 }
4188
4189 int
if_setcapabilities2(if_t ifp,int capabilities)4190 if_setcapabilities2(if_t ifp, int capabilities)
4191 {
4192 ifp->if_capabilities2 = capabilities;
4193 return (0);
4194 }
4195
4196 int
if_setcapabilities2bit(if_t ifp,int setbit,int clearbit)4197 if_setcapabilities2bit(if_t ifp, int setbit, int clearbit)
4198 {
4199 ifp->if_capabilities2 &= ~clearbit;
4200 ifp->if_capabilities2 |= setbit;
4201 return (0);
4202 }
4203
4204 int
if_getcapabilities2(const if_t ifp)4205 if_getcapabilities2(const if_t ifp)
4206 {
4207 return (ifp->if_capabilities2);
4208 }
4209
4210 int
if_setcapenable2(if_t ifp,int capabilities2)4211 if_setcapenable2(if_t ifp, int capabilities2)
4212 {
4213 ifp->if_capenable2 = capabilities2;
4214 return (0);
4215 }
4216
4217 int
if_setcapenable2bit(if_t ifp,int setcap,int clearcap)4218 if_setcapenable2bit(if_t ifp, int setcap, int clearcap)
4219 {
4220 ifp->if_capenable2 &= ~clearcap;
4221 ifp->if_capenable2 |= setcap;
4222 return (0);
4223 }
4224
4225 const char *
if_getdname(const if_t ifp)4226 if_getdname(const if_t ifp)
4227 {
4228 return (ifp->if_dname);
4229 }
4230
4231 void
if_setdname(if_t ifp,const char * dname)4232 if_setdname(if_t ifp, const char *dname)
4233 {
4234 ifp->if_dname = dname;
4235 }
4236
4237 const char *
if_name(if_t ifp)4238 if_name(if_t ifp)
4239 {
4240 return (ifp->if_xname);
4241 }
4242
4243 int
if_setname(if_t ifp,const char * name)4244 if_setname(if_t ifp, const char *name)
4245 {
4246 if (strlen(name) > sizeof(ifp->if_xname) - 1)
4247 return (ENAMETOOLONG);
4248 strcpy(ifp->if_xname, name);
4249
4250 return (0);
4251 }
4252
4253 int
if_togglecapenable(if_t ifp,int togglecap)4254 if_togglecapenable(if_t ifp, int togglecap)
4255 {
4256 ifp->if_capenable ^= togglecap;
4257 return (0);
4258 }
4259
4260 int
if_getcapenable(const if_t ifp)4261 if_getcapenable(const if_t ifp)
4262 {
4263 return (ifp->if_capenable);
4264 }
4265
4266 int
if_togglecapenable2(if_t ifp,int togglecap)4267 if_togglecapenable2(if_t ifp, int togglecap)
4268 {
4269 ifp->if_capenable2 ^= togglecap;
4270 return (0);
4271 }
4272
4273 int
if_getcapenable2(const if_t ifp)4274 if_getcapenable2(const if_t ifp)
4275 {
4276 return (ifp->if_capenable2);
4277 }
4278
4279 int
if_getdunit(const if_t ifp)4280 if_getdunit(const if_t ifp)
4281 {
4282 return (ifp->if_dunit);
4283 }
4284
4285 int
if_getindex(const if_t ifp)4286 if_getindex(const if_t ifp)
4287 {
4288 return (ifp->if_index);
4289 }
4290
4291 int
if_getidxgen(const if_t ifp)4292 if_getidxgen(const if_t ifp)
4293 {
4294 return (ifp->if_idxgen);
4295 }
4296
4297 const char *
if_getdescr(if_t ifp)4298 if_getdescr(if_t ifp)
4299 {
4300 return (ifp->if_description);
4301 }
4302
4303 void
if_setdescr(if_t ifp,char * descrbuf)4304 if_setdescr(if_t ifp, char *descrbuf)
4305 {
4306 sx_xlock(&ifdescr_sx);
4307 char *odescrbuf = ifp->if_description;
4308 ifp->if_description = descrbuf;
4309 sx_xunlock(&ifdescr_sx);
4310
4311 if_freedescr(odescrbuf);
4312 }
4313
4314 char *
if_allocdescr(size_t sz,int malloc_flag)4315 if_allocdescr(size_t sz, int malloc_flag)
4316 {
4317 malloc_flag &= (M_WAITOK | M_NOWAIT);
4318 return (malloc(sz, M_IFDESCR, M_ZERO | malloc_flag));
4319 }
4320
4321 void
if_freedescr(char * descrbuf)4322 if_freedescr(char *descrbuf)
4323 {
4324 free(descrbuf, M_IFDESCR);
4325 }
4326
4327 int
if_getalloctype(const if_t ifp)4328 if_getalloctype(const if_t ifp)
4329 {
4330 return (ifp->if_alloctype);
4331 }
4332
4333 void
if_setlastchange(if_t ifp)4334 if_setlastchange(if_t ifp)
4335 {
4336 getmicrotime(&ifp->if_lastchange);
4337 }
4338
4339 /*
4340 * This is largely undesirable because it ties ifnet to a device, but does
4341 * provide flexiblity for an embedded product vendor. Should be used with
4342 * the understanding that it violates the interface boundaries, and should be
4343 * a last resort only.
4344 */
4345 int
if_setdev(if_t ifp,void * dev)4346 if_setdev(if_t ifp, void *dev)
4347 {
4348 return (0);
4349 }
4350
4351 int
if_setdrvflagbits(if_t ifp,int set_flags,int clear_flags)4352 if_setdrvflagbits(if_t ifp, int set_flags, int clear_flags)
4353 {
4354 ifp->if_drv_flags &= ~clear_flags;
4355 ifp->if_drv_flags |= set_flags;
4356
4357 return (0);
4358 }
4359
4360 int
if_getdrvflags(const if_t ifp)4361 if_getdrvflags(const if_t ifp)
4362 {
4363 return (ifp->if_drv_flags);
4364 }
4365
4366 int
if_setdrvflags(if_t ifp,int flags)4367 if_setdrvflags(if_t ifp, int flags)
4368 {
4369 ifp->if_drv_flags = flags;
4370 return (0);
4371 }
4372
4373 int
if_setflags(if_t ifp,int flags)4374 if_setflags(if_t ifp, int flags)
4375 {
4376 ifp->if_flags = flags;
4377 return (0);
4378 }
4379
4380 int
if_setflagbits(if_t ifp,int set,int clear)4381 if_setflagbits(if_t ifp, int set, int clear)
4382 {
4383 ifp->if_flags &= ~clear;
4384 ifp->if_flags |= set;
4385 return (0);
4386 }
4387
4388 int
if_getflags(const if_t ifp)4389 if_getflags(const if_t ifp)
4390 {
4391 return (ifp->if_flags);
4392 }
4393
4394 int
if_clearhwassist(if_t ifp)4395 if_clearhwassist(if_t ifp)
4396 {
4397 ifp->if_hwassist = 0;
4398 return (0);
4399 }
4400
4401 int
if_sethwassistbits(if_t ifp,int toset,int toclear)4402 if_sethwassistbits(if_t ifp, int toset, int toclear)
4403 {
4404 ifp->if_hwassist &= ~toclear;
4405 ifp->if_hwassist |= toset;
4406
4407 return (0);
4408 }
4409
4410 int
if_sethwassist(if_t ifp,int hwassist_bit)4411 if_sethwassist(if_t ifp, int hwassist_bit)
4412 {
4413 ifp->if_hwassist = hwassist_bit;
4414 return (0);
4415 }
4416
4417 int
if_gethwassist(const if_t ifp)4418 if_gethwassist(const if_t ifp)
4419 {
4420 return (ifp->if_hwassist);
4421 }
4422
4423 int
if_togglehwassist(if_t ifp,int toggle_bits)4424 if_togglehwassist(if_t ifp, int toggle_bits)
4425 {
4426 ifp->if_hwassist ^= toggle_bits;
4427 return (0);
4428 }
4429
4430 int
if_setmtu(if_t ifp,int mtu)4431 if_setmtu(if_t ifp, int mtu)
4432 {
4433 ifp->if_mtu = mtu;
4434 return (0);
4435 }
4436
4437 void
if_notifymtu(if_t ifp)4438 if_notifymtu(if_t ifp)
4439 {
4440 #ifdef INET6
4441 nd6_setmtu(ifp);
4442 #endif
4443 rt_updatemtu(ifp);
4444 }
4445
4446 int
if_getmtu(const if_t ifp)4447 if_getmtu(const if_t ifp)
4448 {
4449 return (ifp->if_mtu);
4450 }
4451
4452 int
if_getmtu_family(const if_t ifp,int family)4453 if_getmtu_family(const if_t ifp, int family)
4454 {
4455 struct domain *dp;
4456
4457 SLIST_FOREACH(dp, &domains, dom_next) {
4458 if (dp->dom_family == family && dp->dom_ifmtu != NULL)
4459 return (dp->dom_ifmtu(ifp));
4460 }
4461
4462 return (ifp->if_mtu);
4463 }
4464
4465 void
if_setppromisc(if_t ifp,bool ppromisc)4466 if_setppromisc(if_t ifp, bool ppromisc)
4467 {
4468 int new_flags;
4469
4470 if (ppromisc)
4471 new_flags = ifp->if_flags | IFF_PPROMISC;
4472 else
4473 new_flags = ifp->if_flags & ~IFF_PPROMISC;
4474 if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) {
4475 if (new_flags & IFF_PPROMISC)
4476 new_flags |= IFF_PROMISC;
4477 /*
4478 * Only unset IFF_PROMISC if there are no more consumers of
4479 * promiscuity, i.e. the ifp->if_pcount refcount is 0.
4480 */
4481 else if (ifp->if_pcount == 0)
4482 new_flags &= ~IFF_PROMISC;
4483 if (log_promisc_mode_change)
4484 if_printf(ifp, "permanently promiscuous mode %s\n",
4485 ((new_flags & IFF_PPROMISC) ?
4486 "enabled" : "disabled"));
4487 }
4488 ifp->if_flags = new_flags;
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 char *
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_vlancap(if_t ifp)4904 if_vlancap(if_t ifp)
4905 {
4906 VLAN_CAPABILITIES(ifp);
4907 }
4908
4909 int
if_sethwtsomax(if_t ifp,u_int if_hw_tsomax)4910 if_sethwtsomax(if_t ifp, u_int if_hw_tsomax)
4911 {
4912 ifp->if_hw_tsomax = if_hw_tsomax;
4913 return (0);
4914 }
4915
4916 int
if_sethwtsomaxsegcount(if_t ifp,u_int if_hw_tsomaxsegcount)4917 if_sethwtsomaxsegcount(if_t ifp, u_int if_hw_tsomaxsegcount)
4918 {
4919 ifp->if_hw_tsomaxsegcount = if_hw_tsomaxsegcount;
4920 return (0);
4921 }
4922
4923 int
if_sethwtsomaxsegsize(if_t ifp,u_int if_hw_tsomaxsegsize)4924 if_sethwtsomaxsegsize(if_t ifp, u_int if_hw_tsomaxsegsize)
4925 {
4926 ifp->if_hw_tsomaxsegsize = if_hw_tsomaxsegsize;
4927 return (0);
4928 }
4929
4930 u_int
if_gethwtsomax(const if_t ifp)4931 if_gethwtsomax(const if_t ifp)
4932 {
4933 return (ifp->if_hw_tsomax);
4934 }
4935
4936 u_int
if_gethwtsomaxsegcount(const if_t ifp)4937 if_gethwtsomaxsegcount(const if_t ifp)
4938 {
4939 return (ifp->if_hw_tsomaxsegcount);
4940 }
4941
4942 u_int
if_gethwtsomaxsegsize(const if_t ifp)4943 if_gethwtsomaxsegsize(const if_t ifp)
4944 {
4945 return (ifp->if_hw_tsomaxsegsize);
4946 }
4947
4948 void
if_setinitfn(if_t ifp,if_init_fn_t init_fn)4949 if_setinitfn(if_t ifp, if_init_fn_t init_fn)
4950 {
4951 ifp->if_init = init_fn;
4952 }
4953
4954 void
if_setinputfn(if_t ifp,if_input_fn_t input_fn)4955 if_setinputfn(if_t ifp, if_input_fn_t input_fn)
4956 {
4957 ifp->if_input = input_fn;
4958 }
4959
4960 if_input_fn_t
if_getinputfn(if_t ifp)4961 if_getinputfn(if_t ifp)
4962 {
4963 return (ifp->if_input);
4964 }
4965
4966 void
if_setioctlfn(if_t ifp,if_ioctl_fn_t ioctl_fn)4967 if_setioctlfn(if_t ifp, if_ioctl_fn_t ioctl_fn)
4968 {
4969 ifp->if_ioctl = ioctl_fn;
4970 }
4971
4972 void
if_setoutputfn(if_t ifp,if_output_fn_t output_fn)4973 if_setoutputfn(if_t ifp, if_output_fn_t output_fn)
4974 {
4975 ifp->if_output = output_fn;
4976 }
4977
4978 void
if_setstartfn(if_t ifp,if_start_fn_t start_fn)4979 if_setstartfn(if_t ifp, if_start_fn_t start_fn)
4980 {
4981 ifp->if_start = start_fn;
4982 }
4983
4984 if_start_fn_t
if_getstartfn(if_t ifp)4985 if_getstartfn(if_t ifp)
4986 {
4987 return (ifp->if_start);
4988 }
4989
4990 void
if_settransmitfn(if_t ifp,if_transmit_fn_t start_fn)4991 if_settransmitfn(if_t ifp, if_transmit_fn_t start_fn)
4992 {
4993 ifp->if_transmit = start_fn;
4994 }
4995
4996 if_transmit_fn_t
if_gettransmitfn(if_t ifp)4997 if_gettransmitfn(if_t ifp)
4998 {
4999 return (ifp->if_transmit);
5000 }
5001
5002 void
if_setqflushfn(if_t ifp,if_qflush_fn_t flush_fn)5003 if_setqflushfn(if_t ifp, if_qflush_fn_t flush_fn)
5004 {
5005 ifp->if_qflush = flush_fn;
5006 }
5007
5008 void
if_setsndtagallocfn(if_t ifp,if_snd_tag_alloc_t alloc_fn)5009 if_setsndtagallocfn(if_t ifp, if_snd_tag_alloc_t alloc_fn)
5010 {
5011 ifp->if_snd_tag_alloc = alloc_fn;
5012 }
5013
5014 int
if_snd_tag_alloc(if_t ifp,union if_snd_tag_alloc_params * params,struct m_snd_tag ** mstp)5015 if_snd_tag_alloc(if_t ifp, union if_snd_tag_alloc_params *params,
5016 struct m_snd_tag **mstp)
5017 {
5018 if (ifp->if_snd_tag_alloc == NULL)
5019 return (EOPNOTSUPP);
5020 return (ifp->if_snd_tag_alloc(ifp, params, mstp));
5021 }
5022
5023 void
if_setgetcounterfn(if_t ifp,if_get_counter_t fn)5024 if_setgetcounterfn(if_t ifp, if_get_counter_t fn)
5025 {
5026 ifp->if_get_counter = fn;
5027 }
5028
5029 void
if_setreassignfn(if_t ifp,if_reassign_fn_t fn)5030 if_setreassignfn(if_t ifp, if_reassign_fn_t fn)
5031 {
5032 ifp->if_reassign = fn;
5033 }
5034
5035 void
if_setratelimitqueryfn(if_t ifp,if_ratelimit_query_t fn)5036 if_setratelimitqueryfn(if_t ifp, if_ratelimit_query_t fn)
5037 {
5038 ifp->if_ratelimit_query = fn;
5039 }
5040
5041 void
if_setdebugnet_methods(if_t ifp,struct debugnet_methods * m)5042 if_setdebugnet_methods(if_t ifp, struct debugnet_methods *m)
5043 {
5044 ifp->if_debugnet_methods = m;
5045 }
5046
5047 struct label *
if_getmaclabel(if_t ifp)5048 if_getmaclabel(if_t ifp)
5049 {
5050 return (ifp->if_label);
5051 }
5052
5053 void
if_setmaclabel(if_t ifp,struct label * label)5054 if_setmaclabel(if_t ifp, struct label *label)
5055 {
5056 ifp->if_label = label;
5057 }
5058
5059 int
if_gettype(if_t ifp)5060 if_gettype(if_t ifp)
5061 {
5062 return (ifp->if_type);
5063 }
5064
5065 void *
if_getllsoftc(if_t ifp)5066 if_getllsoftc(if_t ifp)
5067 {
5068 return (ifp->if_llsoftc);
5069 }
5070
5071 void
if_setllsoftc(if_t ifp,void * llsoftc)5072 if_setllsoftc(if_t ifp, void *llsoftc)
5073 {
5074 ifp->if_llsoftc = llsoftc;
5075 };
5076
5077 int
if_getlinkstate(if_t ifp)5078 if_getlinkstate(if_t ifp)
5079 {
5080 return (ifp->if_link_state);
5081 }
5082
5083 const uint8_t *
if_getbroadcastaddr(if_t ifp)5084 if_getbroadcastaddr(if_t ifp)
5085 {
5086 return (ifp->if_broadcastaddr);
5087 }
5088
5089 void
if_setbroadcastaddr(if_t ifp,const uint8_t * addr)5090 if_setbroadcastaddr(if_t ifp, const uint8_t *addr)
5091 {
5092 ifp->if_broadcastaddr = addr;
5093 }
5094
5095 int
if_getnumadomain(if_t ifp)5096 if_getnumadomain(if_t ifp)
5097 {
5098 return (ifp->if_numa_domain);
5099 }
5100
5101 uint64_t
if_getcounter(if_t ifp,ift_counter counter)5102 if_getcounter(if_t ifp, ift_counter counter)
5103 {
5104 return (ifp->if_get_counter(ifp, counter));
5105 }
5106
5107 bool
if_altq_is_enabled(if_t ifp)5108 if_altq_is_enabled(if_t ifp)
5109 {
5110 return (ALTQ_IS_ENABLED(&ifp->if_snd));
5111 }
5112
5113 struct vnet *
if_getvnet(if_t ifp)5114 if_getvnet(if_t ifp)
5115 {
5116 return (ifp->if_vnet);
5117 }
5118
5119 void *
if_getafdata(if_t ifp,int af)5120 if_getafdata(if_t ifp, int af)
5121 {
5122 return (ifp->if_afdata[af]);
5123 }
5124
5125 u_int
if_getfib(if_t ifp)5126 if_getfib(if_t ifp)
5127 {
5128 return (ifp->if_fib);
5129 }
5130
5131 uint8_t
if_getaddrlen(if_t ifp)5132 if_getaddrlen(if_t ifp)
5133 {
5134 return (ifp->if_addrlen);
5135 }
5136
5137 struct bpf_if *
if_getbpf(if_t ifp)5138 if_getbpf(if_t ifp)
5139 {
5140 return (ifp->if_bpf);
5141 }
5142
5143 struct ifvlantrunk *
if_getvlantrunk(if_t ifp)5144 if_getvlantrunk(if_t ifp)
5145 {
5146 return (ifp->if_vlantrunk);
5147 }
5148
5149 uint8_t
if_getpcp(if_t ifp)5150 if_getpcp(if_t ifp)
5151 {
5152 return (ifp->if_pcp);
5153 }
5154
5155 void *
if_getl2com(if_t ifp)5156 if_getl2com(if_t ifp)
5157 {
5158 return (ifp->if_l2com);
5159 }
5160
5161 void
if_setipsec_accel_methods(if_t ifp,const struct if_ipsec_accel_methods * m)5162 if_setipsec_accel_methods(if_t ifp, const struct if_ipsec_accel_methods *m)
5163 {
5164 ifp->if_ipsec_accel_m = m;
5165 }
5166
5167 #ifdef DDB
5168 static void
if_show_ifnet(struct ifnet * ifp)5169 if_show_ifnet(struct ifnet *ifp)
5170 {
5171 if (ifp == NULL)
5172 return;
5173 db_printf("%s:\n", ifp->if_xname);
5174 #define IF_DB_PRINTF(f, e) db_printf(" %s = " f "\n", #e, ifp->e);
5175 IF_DB_PRINTF("%s", if_dname);
5176 IF_DB_PRINTF("%d", if_dunit);
5177 IF_DB_PRINTF("%s", if_description);
5178 IF_DB_PRINTF("%u", if_index);
5179 IF_DB_PRINTF("%d", if_idxgen);
5180 IF_DB_PRINTF("%u", if_refcount);
5181 IF_DB_PRINTF("%p", if_softc);
5182 IF_DB_PRINTF("%p", if_l2com);
5183 IF_DB_PRINTF("%p", if_llsoftc);
5184 IF_DB_PRINTF("%d", if_amcount);
5185 IF_DB_PRINTF("%p", if_addr);
5186 IF_DB_PRINTF("%p", if_broadcastaddr);
5187 IF_DB_PRINTF("%p", if_afdata);
5188 IF_DB_PRINTF("%d", if_afdata_initialized);
5189 IF_DB_PRINTF("%u", if_fib);
5190 IF_DB_PRINTF("%p", if_vnet);
5191 IF_DB_PRINTF("%p", if_home_vnet);
5192 IF_DB_PRINTF("%p", if_vlantrunk);
5193 IF_DB_PRINTF("%p", if_bpf);
5194 IF_DB_PRINTF("%u", if_pcount);
5195 IF_DB_PRINTF("%p", if_bridge);
5196 IF_DB_PRINTF("%p", if_lagg);
5197 IF_DB_PRINTF("%p", if_pf_kif);
5198 IF_DB_PRINTF("%p", if_carp);
5199 IF_DB_PRINTF("%p", if_label);
5200 IF_DB_PRINTF("%p", if_netmap);
5201 IF_DB_PRINTF("0x%08x", if_flags);
5202 IF_DB_PRINTF("0x%08x", if_drv_flags);
5203 IF_DB_PRINTF("0x%08x", if_capabilities);
5204 IF_DB_PRINTF("0x%08x", if_capenable);
5205 IF_DB_PRINTF("%p", if_snd.ifq_head);
5206 IF_DB_PRINTF("%p", if_snd.ifq_tail);
5207 IF_DB_PRINTF("%d", if_snd.ifq_len);
5208 IF_DB_PRINTF("%d", if_snd.ifq_maxlen);
5209 IF_DB_PRINTF("%p", if_snd.ifq_drv_head);
5210 IF_DB_PRINTF("%p", if_snd.ifq_drv_tail);
5211 IF_DB_PRINTF("%d", if_snd.ifq_drv_len);
5212 IF_DB_PRINTF("%d", if_snd.ifq_drv_maxlen);
5213 IF_DB_PRINTF("%d", if_snd.altq_type);
5214 IF_DB_PRINTF("%x", if_snd.altq_flags);
5215 #undef IF_DB_PRINTF
5216 }
5217
DB_SHOW_COMMAND(ifnet,db_show_ifnet)5218 DB_SHOW_COMMAND(ifnet, db_show_ifnet)
5219 {
5220 if (!have_addr) {
5221 db_printf("usage: show ifnet <struct ifnet *>\n");
5222 return;
5223 }
5224
5225 if_show_ifnet((struct ifnet *)addr);
5226 }
5227
DB_SHOW_ALL_COMMAND(ifnets,db_show_all_ifnets)5228 DB_SHOW_ALL_COMMAND(ifnets, db_show_all_ifnets)
5229 {
5230 struct ifnet *ifp;
5231 u_short idx;
5232
5233 for (idx = 1; idx <= if_index; idx++) {
5234 ifp = ifindex_table[idx].ife_ifnet;
5235 if (ifp == NULL)
5236 continue;
5237 db_printf( "%20s ifp=%p\n", ifp->if_xname, ifp);
5238 if (db_pager_quit)
5239 break;
5240 }
5241 }
5242 #endif /* DDB */
5243