2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1980, 1986, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * @(#)if.c 8.5 (Berkeley) 1/9/95
35 #include "opt_inet6.h"
38 #include <sys/param.h>
39 #include <sys/types.h>
41 #include <sys/malloc.h>
44 #include <sys/epoch.h>
46 #include <sys/systm.h>
49 #include <sys/socket.h>
50 #include <sys/socketvar.h>
51 #include <sys/protosw.h>
52 #include <sys/kernel.h>
54 #include <sys/refcount.h>
55 #include <sys/module.h>
56 #include <sys/rwlock.h>
57 #include <sys/sockio.h>
58 #include <sys/syslog.h>
59 #include <sys/sysctl.h>
60 #include <sys/sysent.h>
61 #include <sys/taskqueue.h>
62 #include <sys/domain.h>
66 #include <machine/stdarg.h>
70 #include <net/ethernet.h>
72 #include <net/if_arp.h>
73 #include <net/if_clone.h>
74 #include <net/if_dl.h>
75 #include <net/if_types.h>
76 #include <net/if_var.h>
77 #include <net/if_media.h>
78 #include <net/if_vlan_var.h>
79 #include <net/radix.h>
80 #include <net/route.h>
83 #if defined(INET) || defined(INET6)
84 #include <net/ethernet.h>
85 #include <netinet/in.h>
86 #include <netinet/in_var.h>
87 #include <netinet/ip.h>
88 #include <netinet/ip_carp.h>
90 #include <netinet/if_ether.h>
91 #include <netinet/netdump/netdump.h>
94 #include <netinet6/in6_var.h>
95 #include <netinet6/in6_ifattach.h>
97 #endif /* INET || INET6 */
99 #include <security/mac/mac_framework.h>
102 * Consumers of struct ifreq such as tcpdump assume no pad between ifr_name
103 * and ifr_ifru when it is used in SIOCGIFCONF.
105 _Static_assert(sizeof(((struct ifreq *)0)->ifr_name) ==
106 offsetof(struct ifreq, ifr_ifru), "gap between ifr_name and ifr_ifru");
108 __read_mostly epoch_t net_epoch_preempt;
109 __read_mostly epoch_t net_epoch;
110 #ifdef COMPAT_FREEBSD32
111 #include <sys/mount.h>
112 #include <compat/freebsd32/freebsd32.h>
114 struct ifreq_buffer32 {
115 uint32_t length; /* (size_t) */
116 uint32_t buffer; /* (void *) */
120 * Interface request structure used for socket
121 * ioctl's. All interface ioctl's must have parameter
122 * definitions which begin with ifr_name. The
123 * remainder may be interface specific.
126 char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */
128 struct sockaddr ifru_addr;
129 struct sockaddr ifru_dstaddr;
130 struct sockaddr ifru_broadaddr;
131 struct ifreq_buffer32 ifru_buffer;
142 u_char ifru_vlan_pcp;
145 CTASSERT(sizeof(struct ifreq) == sizeof(struct ifreq32));
146 CTASSERT(__offsetof(struct ifreq, ifr_ifru) ==
147 __offsetof(struct ifreq32, ifr_ifru));
149 struct ifgroupreq32 {
150 char ifgr_name[IFNAMSIZ];
153 char ifgru_group[IFNAMSIZ];
154 uint32_t ifgru_groups;
158 struct ifmediareq32 {
159 char ifm_name[IFNAMSIZ];
165 uint32_t ifm_ulist; /* (int *) */
167 #define SIOCGIFMEDIA32 _IOC_NEWTYPE(SIOCGIFMEDIA, struct ifmediareq32)
168 #define SIOCGIFXMEDIA32 _IOC_NEWTYPE(SIOCGIFXMEDIA, struct ifmediareq32)
170 #define _CASE_IOC_IFGROUPREQ_32(cmd) \
171 case _IOC_NEWTYPE((cmd), struct ifgroupreq32):
172 #else /* !COMPAT_FREEBSD32 */
173 #define _CASE_IOC_IFGROUPREQ_32(cmd)
174 #endif /* !COMPAT_FREEBSD32 */
176 #define CASE_IOC_IFGROUPREQ(cmd) \
177 _CASE_IOC_IFGROUPREQ_32(cmd) \
182 #ifdef COMPAT_FREEBSD32
183 struct ifreq32 ifr32;
187 union ifgroupreq_union {
188 struct ifgroupreq ifgr;
189 #ifdef COMPAT_FREEBSD32
190 struct ifgroupreq32 ifgr32;
194 SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers");
195 SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management");
197 SYSCTL_INT(_net_link, OID_AUTO, ifqmaxlen, CTLFLAG_RDTUN,
198 &ifqmaxlen, 0, "max send queue size");
200 /* Log link state change events */
201 static int log_link_state_change = 1;
203 SYSCTL_INT(_net_link, OID_AUTO, log_link_state_change, CTLFLAG_RW,
204 &log_link_state_change, 0,
205 "log interface link state change events");
207 /* Log promiscuous mode change events */
208 static int log_promisc_mode_change = 1;
210 SYSCTL_INT(_net_link, OID_AUTO, log_promisc_mode_change, CTLFLAG_RDTUN,
211 &log_promisc_mode_change, 1,
212 "log promiscuous mode change events");
214 /* Interface description */
215 static unsigned int ifdescr_maxlen = 1024;
216 SYSCTL_UINT(_net, OID_AUTO, ifdescr_maxlen, CTLFLAG_RW,
218 "administrative maximum length for interface description");
220 static MALLOC_DEFINE(M_IFDESCR, "ifdescr", "ifnet descriptions");
222 /* global sx for non-critical path ifdescr */
223 static struct sx ifdescr_sx;
224 SX_SYSINIT(ifdescr_sx, &ifdescr_sx, "ifnet descr");
226 void (*ng_ether_link_state_p)(struct ifnet *ifp, int state);
227 void (*lagg_linkstate_p)(struct ifnet *ifp, int state);
228 /* These are external hooks for CARP. */
229 void (*carp_linkstate_p)(struct ifnet *ifp);
230 void (*carp_demote_adj_p)(int, char *);
231 int (*carp_master_p)(struct ifaddr *);
232 #if defined(INET) || defined(INET6)
233 int (*carp_forus_p)(struct ifnet *ifp, u_char *dhost);
234 int (*carp_output_p)(struct ifnet *ifp, struct mbuf *m,
235 const struct sockaddr *sa);
236 int (*carp_ioctl_p)(struct ifreq *, u_long, struct thread *);
237 int (*carp_attach_p)(struct ifaddr *, int);
238 void (*carp_detach_p)(struct ifaddr *, bool);
241 int (*carp_iamatch_p)(struct ifaddr *, uint8_t **);
244 struct ifaddr *(*carp_iamatch6_p)(struct ifnet *ifp, struct in6_addr *taddr6);
245 caddr_t (*carp_macmatch6_p)(struct ifnet *ifp, struct mbuf *m,
246 const struct in6_addr *taddr);
249 struct mbuf *(*tbr_dequeue_ptr)(struct ifaltq *, int) = NULL;
252 * XXX: Style; these should be sorted alphabetically, and unprototyped
253 * static functions should be prototyped. Currently they are sorted by
256 static void if_attachdomain(void *);
257 static void if_attachdomain1(struct ifnet *);
258 static int ifconf(u_long, caddr_t);
259 static void *if_grow(void);
260 static void if_input_default(struct ifnet *, struct mbuf *);
261 static int if_requestencap_default(struct ifnet *, struct if_encap_req *);
262 static void if_route(struct ifnet *, int flag, int fam);
263 static int if_setflag(struct ifnet *, int, int, int *, int);
264 static int if_transmit(struct ifnet *ifp, struct mbuf *m);
265 static void if_unroute(struct ifnet *, int flag, int fam);
266 static void link_rtrequest(int, struct rtentry *, struct rt_addrinfo *);
267 static int if_delmulti_locked(struct ifnet *, struct ifmultiaddr *, int);
268 static void do_link_state_change(void *, int);
269 static int if_getgroup(struct ifgroupreq *, struct ifnet *);
270 static int if_getgroupmembers(struct ifgroupreq *);
271 static void if_delgroups(struct ifnet *);
272 static void if_attach_internal(struct ifnet *, int, struct if_clone *);
273 static int if_detach_internal(struct ifnet *, int, struct if_clone **);
275 static void if_vmove(struct ifnet *, struct vnet *);
280 * XXX: declare here to avoid to include many inet6 related files..
281 * should be more generalized?
283 extern void nd6_setmtu(struct ifnet *);
286 /* ipsec helper hooks */
287 VNET_DEFINE(struct hhook_head *, ipsec_hhh_in[HHOOK_IPSEC_COUNT]);
288 VNET_DEFINE(struct hhook_head *, ipsec_hhh_out[HHOOK_IPSEC_COUNT]);
290 VNET_DEFINE(int, if_index);
291 int ifqmaxlen = IFQ_MAXLEN;
292 VNET_DEFINE(struct ifnethead, ifnet); /* depend on static init XXX */
293 VNET_DEFINE(struct ifgrouphead, ifg_head);
295 VNET_DEFINE_STATIC(int, if_indexlim) = 8;
297 /* Table of ifnet by index. */
298 VNET_DEFINE(struct ifnet **, ifindex_table);
300 #define V_if_indexlim VNET(if_indexlim)
301 #define V_ifindex_table VNET(ifindex_table)
304 * The global network interface list (V_ifnet) and related state (such as
305 * if_index, if_indexlim, and ifindex_table) are protected by an sxlock and
306 * an rwlock. Either may be acquired shared to stablize the list, but both
307 * must be acquired writable to modify the list. This model allows us to
308 * both stablize the interface list during interrupt thread processing, but
309 * also to stablize it over long-running ioctls, without introducing priority
310 * inversions and deadlocks.
312 struct rwlock ifnet_rwlock;
313 RW_SYSINIT_FLAGS(ifnet_rw, &ifnet_rwlock, "ifnet_rw", RW_RECURSE);
314 struct sx ifnet_sxlock;
315 SX_SYSINIT_FLAGS(ifnet_sx, &ifnet_sxlock, "ifnet_sx", SX_RECURSE);
318 * The allocation of network interfaces is a rather non-atomic affair; we
319 * need to select an index before we are ready to expose the interface for
320 * use, so will use this pointer value to indicate reservation.
322 #define IFNET_HOLD (void *)(uintptr_t)(-1)
324 static if_com_alloc_t *if_com_alloc[256];
325 static if_com_free_t *if_com_free[256];
327 static MALLOC_DEFINE(M_IFNET, "ifnet", "interface internals");
328 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address");
329 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address");
332 ifnet_byindex_locked(u_short idx)
335 if (idx > V_if_index)
337 if (V_ifindex_table[idx] == IFNET_HOLD)
339 return (V_ifindex_table[idx]);
343 ifnet_byindex(u_short idx)
347 ifp = ifnet_byindex_locked(idx);
352 ifnet_byindex_ref(u_short idx)
356 IFNET_RLOCK_NOSLEEP();
357 ifp = ifnet_byindex_locked(idx);
358 if (ifp == NULL || (ifp->if_flags & IFF_DYING)) {
359 IFNET_RUNLOCK_NOSLEEP();
363 IFNET_RUNLOCK_NOSLEEP();
368 * Allocate an ifindex array entry; return 0 on success or an error on
372 ifindex_alloc(void **old)
376 IFNET_WLOCK_ASSERT();
378 * Try to find an empty slot below V_if_index. If we fail, take the
381 for (idx = 1; idx <= V_if_index; idx++) {
382 if (V_ifindex_table[idx] == NULL)
386 /* Catch if_index overflow. */
387 if (idx >= V_if_indexlim) {
391 if (idx > V_if_index)
397 ifindex_free_locked(u_short idx)
400 IFNET_WLOCK_ASSERT();
402 V_ifindex_table[idx] = NULL;
403 while (V_if_index > 0 &&
404 V_ifindex_table[V_if_index] == NULL)
409 ifindex_free(u_short idx)
413 ifindex_free_locked(idx);
418 ifnet_setbyindex(u_short idx, struct ifnet *ifp)
421 V_ifindex_table[idx] = ifp;
425 ifaddr_byindex(u_short idx)
428 struct ifaddr *ifa = NULL;
430 IFNET_RLOCK_NOSLEEP();
431 ifp = ifnet_byindex_locked(idx);
432 if (ifp != NULL && (ifa = ifp->if_addr) != NULL)
434 IFNET_RUNLOCK_NOSLEEP();
439 * Network interface utility routines.
441 * Routines with ifa_ifwith* names take sockaddr *'s as
446 vnet_if_init(const void *unused __unused)
450 CK_STAILQ_INIT(&V_ifnet);
451 CK_STAILQ_INIT(&V_ifg_head);
453 old = if_grow(); /* create initial table */
455 epoch_wait_preempt(net_epoch_preempt);
457 vnet_if_clone_init();
459 VNET_SYSINIT(vnet_if_init, SI_SUB_INIT_IF, SI_ORDER_SECOND, vnet_if_init,
464 vnet_if_uninit(const void *unused __unused)
467 VNET_ASSERT(CK_STAILQ_EMPTY(&V_ifnet), ("%s:%d tailq &V_ifnet=%p "
468 "not empty", __func__, __LINE__, &V_ifnet));
469 VNET_ASSERT(CK_STAILQ_EMPTY(&V_ifg_head), ("%s:%d tailq &V_ifg_head=%p "
470 "not empty", __func__, __LINE__, &V_ifg_head));
472 free((caddr_t)V_ifindex_table, M_IFNET);
474 VNET_SYSUNINIT(vnet_if_uninit, SI_SUB_INIT_IF, SI_ORDER_FIRST,
475 vnet_if_uninit, NULL);
478 vnet_if_return(const void *unused __unused)
480 struct ifnet *ifp, *nifp;
482 /* Return all inherited interfaces to their parent vnets. */
483 CK_STAILQ_FOREACH_SAFE(ifp, &V_ifnet, if_link, nifp) {
484 if (ifp->if_home_vnet != ifp->if_vnet)
485 if_vmove(ifp, ifp->if_home_vnet);
488 VNET_SYSUNINIT(vnet_if_return, SI_SUB_VNET_DONE, SI_ORDER_ANY,
489 vnet_if_return, NULL);
502 IFNET_WLOCK_ASSERT();
503 oldlim = V_if_indexlim;
505 n = (oldlim << 1) * sizeof(*e);
506 e = malloc(n, M_IFNET, M_WAITOK | M_ZERO);
508 if (V_if_indexlim != oldlim) {
512 if (V_ifindex_table != NULL) {
513 memcpy((caddr_t)e, (caddr_t)V_ifindex_table, n/2);
514 old = V_ifindex_table;
522 * Allocate a struct ifnet and an index for an interface. A layer 2
523 * common structure will also be allocated if an allocation routine is
524 * registered for the passed type.
527 if_alloc(u_char type)
533 ifp = malloc(sizeof(struct ifnet), M_IFNET, M_WAITOK|M_ZERO);
536 idx = ifindex_alloc(&old);
537 if (__predict_false(idx == USHRT_MAX)) {
539 epoch_wait_preempt(net_epoch_preempt);
543 ifnet_setbyindex(idx, IFNET_HOLD);
547 ifp->if_alloctype = type;
549 ifp->if_vnet = curvnet;
551 if (if_com_alloc[type] != NULL) {
552 ifp->if_l2com = if_com_alloc[type](type, ifp);
553 if (ifp->if_l2com == NULL) {
560 IF_ADDR_LOCK_INIT(ifp);
561 TASK_INIT(&ifp->if_linktask, 0, do_link_state_change, ifp);
562 ifp->if_afdata_initialized = 0;
563 IF_AFDATA_LOCK_INIT(ifp);
564 CK_STAILQ_INIT(&ifp->if_addrhead);
565 CK_STAILQ_INIT(&ifp->if_multiaddrs);
566 CK_STAILQ_INIT(&ifp->if_groups);
570 ifq_init(&ifp->if_snd, ifp);
572 refcount_init(&ifp->if_refcount, 1); /* Index reference. */
573 for (int i = 0; i < IFCOUNTERS; i++)
574 ifp->if_counters[i] = counter_u64_alloc(M_WAITOK);
575 ifp->if_get_counter = if_get_counter_default;
576 ifp->if_pcp = IFNET_PCP_NONE;
577 ifnet_setbyindex(ifp->if_index, ifp);
582 * Do the actual work of freeing a struct ifnet, and layer 2 common
583 * structure. This call is made when the last reference to an
584 * interface is released.
587 if_free_internal(struct ifnet *ifp)
590 KASSERT((ifp->if_flags & IFF_DYING),
591 ("if_free_internal: interface not dying"));
593 if (if_com_free[ifp->if_alloctype] != NULL)
594 if_com_free[ifp->if_alloctype](ifp->if_l2com,
598 mac_ifnet_destroy(ifp);
600 IF_AFDATA_DESTROY(ifp);
601 IF_ADDR_LOCK_DESTROY(ifp);
602 ifq_delete(&ifp->if_snd);
604 for (int i = 0; i < IFCOUNTERS; i++)
605 counter_u64_free(ifp->if_counters[i]);
607 free(ifp->if_description, M_IFDESCR);
608 free(ifp->if_hw_addr, M_IFADDR);
613 if_destroy(epoch_context_t ctx)
617 ifp = __containerof(ctx, struct ifnet, if_epoch_ctx);
618 if_free_internal(ifp);
622 * Deregister an interface and free the associated storage.
625 if_free(struct ifnet *ifp)
628 ifp->if_flags |= IFF_DYING; /* XXX: Locking */
630 CURVNET_SET_QUIET(ifp->if_vnet);
632 KASSERT(ifp == ifnet_byindex_locked(ifp->if_index),
633 ("%s: freeing unallocated ifnet", ifp->if_xname));
635 ifindex_free_locked(ifp->if_index);
638 if (refcount_release(&ifp->if_refcount))
639 epoch_call(net_epoch_preempt, &ifp->if_epoch_ctx, if_destroy);
644 * Interfaces to keep an ifnet type-stable despite the possibility of the
645 * driver calling if_free(). If there are additional references, we defer
646 * freeing the underlying data structure.
649 if_ref(struct ifnet *ifp)
652 /* We don't assert the ifnet list lock here, but arguably should. */
653 refcount_acquire(&ifp->if_refcount);
657 if_rele(struct ifnet *ifp)
660 if (!refcount_release(&ifp->if_refcount))
662 epoch_call(net_epoch_preempt, &ifp->if_epoch_ctx, if_destroy);
666 ifq_init(struct ifaltq *ifq, struct ifnet *ifp)
669 mtx_init(&ifq->ifq_mtx, ifp->if_xname, "if send queue", MTX_DEF);
671 if (ifq->ifq_maxlen == 0)
672 ifq->ifq_maxlen = ifqmaxlen;
675 ifq->altq_disc = NULL;
676 ifq->altq_flags &= ALTQF_CANTCHANGE;
677 ifq->altq_tbr = NULL;
682 ifq_delete(struct ifaltq *ifq)
684 mtx_destroy(&ifq->ifq_mtx);
688 * Perform generic interface initialization tasks and attach the interface
689 * to the list of "active" interfaces. If vmove flag is set on entry
690 * to if_attach_internal(), perform only a limited subset of initialization
691 * tasks, given that we are moving from one vnet to another an ifnet which
692 * has already been fully initialized.
694 * Note that if_detach_internal() removes group membership unconditionally
695 * even when vmove flag is set, and if_attach_internal() adds only IFG_ALL.
696 * Thus, when if_vmove() is applied to a cloned interface, group membership
697 * is lost while a cloned one always joins a group whose name is
698 * ifc->ifc_name. To recover this after if_detach_internal() and
699 * if_attach_internal(), the cloner should be specified to
700 * if_attach_internal() via ifc. If it is non-NULL, if_attach_internal()
701 * attempts to join a group whose name is ifc->ifc_name.
704 * - The decision to return void and thus require this function to
705 * succeed is questionable.
706 * - We should probably do more sanity checking. For instance we don't
707 * do anything to insure if_xname is unique or non-empty.
710 if_attach(struct ifnet *ifp)
713 if_attach_internal(ifp, 0, NULL);
717 * Compute the least common TSO limit.
720 if_hw_tsomax_common(if_t ifp, struct ifnet_hw_tsomax *pmax)
723 * 1) If there is no limit currently, take the limit from
724 * the network adapter.
726 * 2) If the network adapter has a limit below the current
729 if (pmax->tsomaxbytes == 0 || (ifp->if_hw_tsomax != 0 &&
730 ifp->if_hw_tsomax < pmax->tsomaxbytes)) {
731 pmax->tsomaxbytes = ifp->if_hw_tsomax;
733 if (pmax->tsomaxsegcount == 0 || (ifp->if_hw_tsomaxsegcount != 0 &&
734 ifp->if_hw_tsomaxsegcount < pmax->tsomaxsegcount)) {
735 pmax->tsomaxsegcount = ifp->if_hw_tsomaxsegcount;
737 if (pmax->tsomaxsegsize == 0 || (ifp->if_hw_tsomaxsegsize != 0 &&
738 ifp->if_hw_tsomaxsegsize < pmax->tsomaxsegsize)) {
739 pmax->tsomaxsegsize = ifp->if_hw_tsomaxsegsize;
744 * Update TSO limit of a network adapter.
746 * Returns zero if no change. Else non-zero.
749 if_hw_tsomax_update(if_t ifp, struct ifnet_hw_tsomax *pmax)
752 if (ifp->if_hw_tsomax != pmax->tsomaxbytes) {
753 ifp->if_hw_tsomax = pmax->tsomaxbytes;
756 if (ifp->if_hw_tsomaxsegsize != pmax->tsomaxsegsize) {
757 ifp->if_hw_tsomaxsegsize = pmax->tsomaxsegsize;
760 if (ifp->if_hw_tsomaxsegcount != pmax->tsomaxsegcount) {
761 ifp->if_hw_tsomaxsegcount = pmax->tsomaxsegcount;
768 if_attach_internal(struct ifnet *ifp, int vmove, struct if_clone *ifc)
770 unsigned socksize, ifasize;
771 int namelen, masklen;
772 struct sockaddr_dl *sdl;
775 if (ifp->if_index == 0 || ifp != ifnet_byindex(ifp->if_index))
776 panic ("%s: BUG: if_attach called without if_alloc'd input()\n",
780 ifp->if_vnet = curvnet;
781 if (ifp->if_home_vnet == NULL)
782 ifp->if_home_vnet = curvnet;
785 if_addgroup(ifp, IFG_ALL);
787 /* Restore group membership for cloned interfaces. */
788 if (vmove && ifc != NULL)
789 if_clone_addgroup(ifp, ifc);
791 getmicrotime(&ifp->if_lastchange);
792 ifp->if_epoch = time_uptime;
794 KASSERT((ifp->if_transmit == NULL && ifp->if_qflush == NULL) ||
795 (ifp->if_transmit != NULL && ifp->if_qflush != NULL),
796 ("transmit and qflush must both either be set or both be NULL"));
797 if (ifp->if_transmit == NULL) {
798 ifp->if_transmit = if_transmit;
799 ifp->if_qflush = if_qflush;
801 if (ifp->if_input == NULL)
802 ifp->if_input = if_input_default;
804 if (ifp->if_requestencap == NULL)
805 ifp->if_requestencap = if_requestencap_default;
809 mac_ifnet_create(ifp);
813 * Create a Link Level name for this device.
815 namelen = strlen(ifp->if_xname);
817 * Always save enough space for any possiable name so we
818 * can do a rename in place later.
820 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + IFNAMSIZ;
821 socksize = masklen + ifp->if_addrlen;
822 if (socksize < sizeof(*sdl))
823 socksize = sizeof(*sdl);
824 socksize = roundup2(socksize, sizeof(long));
825 ifasize = sizeof(*ifa) + 2 * socksize;
826 ifa = ifa_alloc(ifasize, M_WAITOK);
827 sdl = (struct sockaddr_dl *)(ifa + 1);
828 sdl->sdl_len = socksize;
829 sdl->sdl_family = AF_LINK;
830 bcopy(ifp->if_xname, sdl->sdl_data, namelen);
831 sdl->sdl_nlen = namelen;
832 sdl->sdl_index = ifp->if_index;
833 sdl->sdl_type = ifp->if_type;
836 ifa->ifa_rtrequest = link_rtrequest;
837 ifa->ifa_addr = (struct sockaddr *)sdl;
838 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
839 ifa->ifa_netmask = (struct sockaddr *)sdl;
840 sdl->sdl_len = masklen;
842 sdl->sdl_data[--namelen] = 0xff;
843 CK_STAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link);
844 /* Reliably crash if used uninitialized. */
845 ifp->if_broadcastaddr = NULL;
847 if (ifp->if_type == IFT_ETHER) {
848 ifp->if_hw_addr = malloc(ifp->if_addrlen, M_IFADDR,
852 #if defined(INET) || defined(INET6)
853 /* Use defaults for TSO, if nothing is set */
854 if (ifp->if_hw_tsomax == 0 &&
855 ifp->if_hw_tsomaxsegcount == 0 &&
856 ifp->if_hw_tsomaxsegsize == 0) {
858 * The TSO defaults needs to be such that an
859 * NFS mbuf list of 35 mbufs totalling just
860 * below 64K works and that a chain of mbufs
861 * can be defragged into at most 32 segments:
863 ifp->if_hw_tsomax = min(IP_MAXPACKET, (32 * MCLBYTES) -
864 (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN));
865 ifp->if_hw_tsomaxsegcount = 35;
866 ifp->if_hw_tsomaxsegsize = 2048; /* 2K */
868 /* XXX some drivers set IFCAP_TSO after ethernet attach */
869 if (ifp->if_capabilities & IFCAP_TSO) {
870 if_printf(ifp, "Using defaults for TSO: %u/%u/%u\n",
872 ifp->if_hw_tsomaxsegcount,
873 ifp->if_hw_tsomaxsegsize);
881 * Update the interface index in the link layer address
884 for (ifa = ifp->if_addr; ifa != NULL;
885 ifa = CK_STAILQ_NEXT(ifa, ifa_link)) {
886 if (ifa->ifa_addr->sa_family == AF_LINK) {
887 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
888 sdl->sdl_index = ifp->if_index;
895 CK_STAILQ_INSERT_TAIL(&V_ifnet, ifp, if_link);
897 curvnet->vnet_ifcnt++;
901 if (domain_init_status >= 2)
902 if_attachdomain1(ifp);
904 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
905 if (IS_DEFAULT_VNET(curvnet))
906 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL);
908 /* Announce the interface. */
909 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
913 if_epochalloc(void *dummy __unused)
916 net_epoch_preempt = epoch_alloc(EPOCH_PREEMPT);
917 net_epoch = epoch_alloc(0);
919 SYSINIT(ifepochalloc, SI_SUB_TASKQ + 1, SI_ORDER_ANY,
920 if_epochalloc, NULL);
923 if_attachdomain(void *dummy)
927 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link)
928 if_attachdomain1(ifp);
930 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_SECOND,
931 if_attachdomain, NULL);
934 if_attachdomain1(struct ifnet *ifp)
939 * Since dp->dom_ifattach calls malloc() with M_WAITOK, we
940 * cannot lock ifp->if_afdata initialization, entirely.
943 if (ifp->if_afdata_initialized >= domain_init_status) {
944 IF_AFDATA_UNLOCK(ifp);
945 log(LOG_WARNING, "%s called more than once on %s\n",
946 __func__, ifp->if_xname);
949 ifp->if_afdata_initialized = domain_init_status;
950 IF_AFDATA_UNLOCK(ifp);
952 /* address family dependent data region */
953 bzero(ifp->if_afdata, sizeof(ifp->if_afdata));
954 for (dp = domains; dp; dp = dp->dom_next) {
955 if (dp->dom_ifattach)
956 ifp->if_afdata[dp->dom_family] =
957 (*dp->dom_ifattach)(ifp);
962 * Remove any unicast or broadcast network addresses from an interface.
965 if_purgeaddrs(struct ifnet *ifp)
971 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
972 if (ifa->ifa_addr->sa_family != AF_LINK)
980 /* XXX: Ugly!! ad hoc just for INET */
981 if (ifa->ifa_addr->sa_family == AF_INET) {
982 struct ifaliasreq ifr;
984 bzero(&ifr, sizeof(ifr));
985 ifr.ifra_addr = *ifa->ifa_addr;
986 if (ifa->ifa_dstaddr)
987 ifr.ifra_broadaddr = *ifa->ifa_dstaddr;
988 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp,
994 if (ifa->ifa_addr->sa_family == AF_INET6) {
996 /* ifp_addrhead is already updated */
1001 CK_STAILQ_REMOVE(&ifp->if_addrhead, ifa, ifaddr, ifa_link);
1002 IF_ADDR_WUNLOCK(ifp);
1008 * Remove any multicast network addresses from an interface when an ifnet
1012 if_purgemaddrs(struct ifnet *ifp)
1014 struct ifmultiaddr *ifma;
1017 while (!CK_STAILQ_EMPTY(&ifp->if_multiaddrs)) {
1018 ifma = CK_STAILQ_FIRST(&ifp->if_multiaddrs);
1019 CK_STAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifmultiaddr, ifma_link);
1020 if_delmulti_locked(ifp, ifma, 1);
1022 IF_ADDR_WUNLOCK(ifp);
1026 * Detach an interface, removing it from the list of "active" interfaces.
1027 * If vmove flag is set on entry to if_detach_internal(), perform only a
1028 * limited subset of cleanup tasks, given that we are moving an ifnet from
1029 * one vnet to another, where it must be fully operational.
1031 * XXXRW: There are some significant questions about event ordering, and
1032 * how to prevent things from starting to use the interface during detach.
1035 if_detach(struct ifnet *ifp)
1038 CURVNET_SET_QUIET(ifp->if_vnet);
1039 if_detach_internal(ifp, 0, NULL);
1044 * The vmove flag, if set, indicates that we are called from a callpath
1045 * that is moving an interface to a different vnet instance.
1047 * The shutdown flag, if set, indicates that we are called in the
1048 * process of shutting down a vnet instance. Currently only the
1049 * vnet_if_return SYSUNINIT function sets it. Note: we can be called
1050 * on a vnet instance shutdown without this flag being set, e.g., when
1051 * the cloned interfaces are destoyed as first thing of teardown.
1054 if_detach_internal(struct ifnet *ifp, int vmove, struct if_clone **ifcp)
1064 shutdown = (ifp->if_vnet->vnet_state > SI_SUB_VNET &&
1065 ifp->if_vnet->vnet_state < SI_SUB_VNET_DONE) ? 1 : 0;
1068 CK_STAILQ_FOREACH(iter, &V_ifnet, if_link)
1070 CK_STAILQ_REMOVE(&V_ifnet, ifp, ifnet, if_link);
1072 ifp->if_flags |= IFF_DYING;
1079 * While we would want to panic here, we cannot
1080 * guarantee that the interface is indeed still on
1081 * the list given we don't hold locks all the way.
1086 panic("%s: ifp=%p not on the ifnet tailq %p",
1087 __func__, ifp, &V_ifnet);
1089 return; /* XXX this should panic as well? */
1094 * At this point we know the interface still was on the ifnet list
1095 * and we removed it so we are in a stable state.
1098 curvnet->vnet_ifcnt--;
1100 epoch_wait_preempt(net_epoch_preempt);
1102 * In any case (destroy or vmove) detach us from the groups
1103 * and remove/wait for pending events on the taskq.
1104 * XXX-BZ in theory an interface could still enqueue a taskq change?
1108 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
1111 * Check if this is a cloned interface or not. Must do even if
1112 * shutting down as a if_vmove_reclaim() would move the ifp and
1113 * the if_clone_addgroup() will have a corrupted string overwise
1114 * from a gibberish pointer.
1116 if (vmove && ifcp != NULL)
1117 *ifcp = if_clone_findifc(ifp);
1123 * On VNET shutdown abort here as the stack teardown will do all
1124 * the work top-down for us.
1127 /* Give interface users the chance to clean up. */
1128 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
1131 * In case of a vmove we are done here without error.
1132 * If we would signal an error it would lead to the same
1133 * abort as if we did not find the ifnet anymore.
1134 * if_detach() calls us in void context and does not care
1135 * about an early abort notification, so life is splendid :)
1137 goto finish_vnet_shutdown;
1142 * At this point we are not tearing down a VNET and are either
1143 * going to destroy or vmove the interface and have to cleanup
1148 * Remove routes and flush queues.
1151 if (ALTQ_IS_ENABLED(&ifp->if_snd))
1152 altq_disable(&ifp->if_snd);
1153 if (ALTQ_IS_ATTACHED(&ifp->if_snd))
1154 altq_detach(&ifp->if_snd);
1165 * Remove all IPv6 kernel structs related to ifp. This should be done
1166 * before removing routing entries below, since IPv6 interface direct
1167 * routes are expected to be removed by the IPv6-specific kernel API.
1168 * Otherwise, the kernel will detect some inconsistency and bark it.
1172 if_purgemaddrs(ifp);
1174 /* Announce that the interface is gone. */
1175 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
1176 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
1177 if (IS_DEFAULT_VNET(curvnet))
1178 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL);
1182 * Prevent further calls into the device driver via ifnet.
1187 * Clean up all addresses.
1190 if (!CK_STAILQ_EMPTY(&ifp->if_addrhead)) {
1191 ifa = CK_STAILQ_FIRST(&ifp->if_addrhead);
1192 CK_STAILQ_REMOVE(&ifp->if_addrhead, ifa, ifaddr, ifa_link);
1193 IF_ADDR_WUNLOCK(ifp);
1196 IF_ADDR_WUNLOCK(ifp);
1199 rt_flushifroutes(ifp);
1202 finish_vnet_shutdown:
1205 * We cannot hold the lock over dom_ifdetach calls as they might
1206 * sleep, for example trying to drain a callout, thus open up the
1207 * theoretical race with re-attaching.
1209 IF_AFDATA_LOCK(ifp);
1210 i = ifp->if_afdata_initialized;
1211 ifp->if_afdata_initialized = 0;
1212 IF_AFDATA_UNLOCK(ifp);
1213 for (dp = domains; i > 0 && dp; dp = dp->dom_next) {
1214 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) {
1215 (*dp->dom_ifdetach)(ifp,
1216 ifp->if_afdata[dp->dom_family]);
1217 ifp->if_afdata[dp->dom_family] = NULL;
1226 * if_vmove() performs a limited version of if_detach() in current
1227 * vnet and if_attach()es the ifnet to the vnet specified as 2nd arg.
1228 * An attempt is made to shrink if_index in current vnet, find an
1229 * unused if_index in target vnet and calls if_grow() if necessary,
1230 * and finally find an unused if_xname for the target vnet.
1233 if_vmove(struct ifnet *ifp, struct vnet *new_vnet)
1235 struct if_clone *ifc;
1236 u_int bif_dlt, bif_hdrlen;
1241 * if_detach_internal() will call the eventhandler to notify
1242 * interface departure. That will detach if_bpf. We need to
1243 * safe the dlt and hdrlen so we can re-attach it later.
1245 bpf_get_bp_params(ifp->if_bpf, &bif_dlt, &bif_hdrlen);
1248 * Detach from current vnet, but preserve LLADDR info, do not
1249 * mark as dead etc. so that the ifnet can be reattached later.
1250 * If we cannot find it, we lost the race to someone else.
1252 rc = if_detach_internal(ifp, 1, &ifc);
1257 * Unlink the ifnet from ifindex_table[] in current vnet, and shrink
1258 * the if_index for that vnet if possible.
1260 * NOTE: IFNET_WLOCK/IFNET_WUNLOCK() are assumed to be unvirtualized,
1261 * or we'd lock on one vnet and unlock on another.
1264 ifindex_free_locked(ifp->if_index);
1268 * Perform interface-specific reassignment tasks, if provided by
1271 if (ifp->if_reassign != NULL)
1272 ifp->if_reassign(ifp, new_vnet, NULL);
1275 * Switch to the context of the target vnet.
1277 CURVNET_SET_QUIET(new_vnet);
1280 ifp->if_index = ifindex_alloc(&old);
1281 if (__predict_false(ifp->if_index == USHRT_MAX)) {
1283 epoch_wait_preempt(net_epoch_preempt);
1287 ifnet_setbyindex(ifp->if_index, ifp);
1290 if_attach_internal(ifp, 1, ifc);
1292 if (ifp->if_bpf == NULL)
1293 bpfattach(ifp, bif_dlt, bif_hdrlen);
1299 * Move an ifnet to or from another child prison/vnet, specified by the jail id.
1302 if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid)
1308 /* Try to find the prison within our visibility. */
1309 sx_slock(&allprison_lock);
1310 pr = prison_find_child(td->td_ucred->cr_prison, jid);
1311 sx_sunlock(&allprison_lock);
1314 prison_hold_locked(pr);
1315 mtx_unlock(&pr->pr_mtx);
1317 /* Do not try to move the iface from and to the same prison. */
1318 if (pr->pr_vnet == ifp->if_vnet) {
1323 /* Make sure the named iface does not exists in the dst. prison/vnet. */
1324 /* XXX Lock interfaces to avoid races. */
1325 CURVNET_SET_QUIET(pr->pr_vnet);
1326 difp = ifunit(ifname);
1333 /* Make sure the VNET is stable. */
1334 shutdown = (ifp->if_vnet->vnet_state > SI_SUB_VNET &&
1335 ifp->if_vnet->vnet_state < SI_SUB_VNET_DONE) ? 1 : 0;
1343 /* Move the interface into the child jail/vnet. */
1344 if_vmove(ifp, pr->pr_vnet);
1346 /* Report the new if_xname back to the userland. */
1347 sprintf(ifname, "%s", ifp->if_xname);
1354 if_vmove_reclaim(struct thread *td, char *ifname, int jid)
1357 struct vnet *vnet_dst;
1361 /* Try to find the prison within our visibility. */
1362 sx_slock(&allprison_lock);
1363 pr = prison_find_child(td->td_ucred->cr_prison, jid);
1364 sx_sunlock(&allprison_lock);
1367 prison_hold_locked(pr);
1368 mtx_unlock(&pr->pr_mtx);
1370 /* Make sure the named iface exists in the source prison/vnet. */
1371 CURVNET_SET(pr->pr_vnet);
1372 ifp = ifunit(ifname); /* XXX Lock to avoid races. */
1379 /* Do not try to move the iface from and to the same prison. */
1380 vnet_dst = TD_TO_VNET(td);
1381 if (vnet_dst == ifp->if_vnet) {
1387 /* Make sure the VNET is stable. */
1388 shutdown = (ifp->if_vnet->vnet_state > SI_SUB_VNET &&
1389 ifp->if_vnet->vnet_state < SI_SUB_VNET_DONE) ? 1 : 0;
1396 /* Get interface back from child jail/vnet. */
1397 if_vmove(ifp, vnet_dst);
1400 /* Report the new if_xname back to the userland. */
1401 sprintf(ifname, "%s", ifp->if_xname);
1409 * Add a group to an interface
1412 if_addgroup(struct ifnet *ifp, const char *groupname)
1414 struct ifg_list *ifgl;
1415 struct ifg_group *ifg = NULL;
1416 struct ifg_member *ifgm;
1419 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' &&
1420 groupname[strlen(groupname) - 1] <= '9')
1424 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1425 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) {
1430 if ((ifgl = (struct ifg_list *)malloc(sizeof(struct ifg_list), M_TEMP,
1431 M_NOWAIT)) == NULL) {
1436 if ((ifgm = (struct ifg_member *)malloc(sizeof(struct ifg_member),
1437 M_TEMP, M_NOWAIT)) == NULL) {
1443 CK_STAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
1444 if (!strcmp(ifg->ifg_group, groupname))
1448 if ((ifg = (struct ifg_group *)malloc(sizeof(struct ifg_group),
1449 M_TEMP, M_NOWAIT)) == NULL) {
1455 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group));
1456 ifg->ifg_refcnt = 0;
1457 CK_STAILQ_INIT(&ifg->ifg_members);
1458 CK_STAILQ_INSERT_TAIL(&V_ifg_head, ifg, ifg_next);
1463 ifgl->ifgl_group = ifg;
1464 ifgm->ifgm_ifp = ifp;
1467 CK_STAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next);
1468 CK_STAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next);
1469 IF_ADDR_WUNLOCK(ifp);
1474 EVENTHANDLER_INVOKE(group_attach_event, ifg);
1475 EVENTHANDLER_INVOKE(group_change_event, groupname);
1481 * Remove a group from an interface
1484 if_delgroup(struct ifnet *ifp, const char *groupname)
1486 struct ifg_list *ifgl;
1487 struct ifg_member *ifgm;
1491 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1492 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname))
1501 CK_STAILQ_REMOVE(&ifp->if_groups, ifgl, ifg_list, ifgl_next);
1502 IF_ADDR_WUNLOCK(ifp);
1504 CK_STAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next)
1505 if (ifgm->ifgm_ifp == ifp)
1509 CK_STAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifg_member, ifgm_next);
1511 if (--ifgl->ifgl_group->ifg_refcnt == 0) {
1512 CK_STAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_group, ifg_next);
1517 epoch_wait_preempt(net_epoch_preempt);
1519 EVENTHANDLER_INVOKE(group_detach_event, ifgl->ifgl_group);
1520 free(ifgl->ifgl_group, M_TEMP);
1525 EVENTHANDLER_INVOKE(group_change_event, groupname);
1531 * Remove an interface from all groups
1534 if_delgroups(struct ifnet *ifp)
1536 struct ifg_list *ifgl;
1537 struct ifg_member *ifgm;
1538 char groupname[IFNAMSIZ];
1542 while (!CK_STAILQ_EMPTY(&ifp->if_groups)) {
1543 ifgl = CK_STAILQ_FIRST(&ifp->if_groups);
1545 strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ);
1548 CK_STAILQ_REMOVE(&ifp->if_groups, ifgl, ifg_list, ifgl_next);
1549 IF_ADDR_WUNLOCK(ifp);
1551 CK_STAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next)
1552 if (ifgm->ifgm_ifp == ifp)
1556 CK_STAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifg_member,
1559 if (--ifgl->ifgl_group->ifg_refcnt == 0) {
1560 CK_STAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_group, ifg_next);
1565 epoch_wait_preempt(net_epoch_preempt);
1568 EVENTHANDLER_INVOKE(group_detach_event,
1570 free(ifgl->ifgl_group, M_TEMP);
1572 EVENTHANDLER_INVOKE(group_change_event, groupname);
1580 ifgr_group_get(void *ifgrp)
1582 union ifgroupreq_union *ifgrup;
1585 #ifdef COMPAT_FREEBSD32
1586 if (SV_CURPROC_FLAG(SV_ILP32))
1587 return (&ifgrup->ifgr32.ifgr_ifgru.ifgru_group[0]);
1589 return (&ifgrup->ifgr.ifgr_ifgru.ifgru_group[0]);
1592 static struct ifg_req *
1593 ifgr_groups_get(void *ifgrp)
1595 union ifgroupreq_union *ifgrup;
1598 #ifdef COMPAT_FREEBSD32
1599 if (SV_CURPROC_FLAG(SV_ILP32))
1600 return ((struct ifg_req *)(uintptr_t)
1601 ifgrup->ifgr32.ifgr_ifgru.ifgru_groups);
1603 return (ifgrup->ifgr.ifgr_ifgru.ifgru_groups);
1607 * Stores all groups from an interface in memory pointed to by ifgr.
1610 if_getgroup(struct ifgroupreq *ifgr, struct ifnet *ifp)
1613 struct ifg_list *ifgl;
1614 struct ifg_req ifgrq, *ifgp;
1616 if (ifgr->ifgr_len == 0) {
1618 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1619 ifgr->ifgr_len += sizeof(struct ifg_req);
1620 IF_ADDR_RUNLOCK(ifp);
1624 len = ifgr->ifgr_len;
1625 ifgp = ifgr_groups_get(ifgr);
1628 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) {
1629 if (len < sizeof(ifgrq)) {
1630 IF_ADDR_RUNLOCK(ifp);
1633 bzero(&ifgrq, sizeof ifgrq);
1634 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group,
1635 sizeof(ifgrq.ifgrq_group));
1636 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) {
1637 IF_ADDR_RUNLOCK(ifp);
1640 len -= sizeof(ifgrq);
1643 IF_ADDR_RUNLOCK(ifp);
1649 * Stores all members of a group in memory pointed to by igfr
1652 if_getgroupmembers(struct ifgroupreq *ifgr)
1654 struct ifg_group *ifg;
1655 struct ifg_member *ifgm;
1656 struct ifg_req ifgrq, *ifgp;
1660 CK_STAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
1661 if (!strcmp(ifg->ifg_group, ifgr->ifgr_name))
1668 if (ifgr->ifgr_len == 0) {
1669 CK_STAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next)
1670 ifgr->ifgr_len += sizeof(ifgrq);
1675 len = ifgr->ifgr_len;
1676 ifgp = ifgr_groups_get(ifgr);
1677 CK_STAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) {
1678 if (len < sizeof(ifgrq)) {
1682 bzero(&ifgrq, sizeof ifgrq);
1683 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname,
1684 sizeof(ifgrq.ifgrq_member));
1685 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) {
1689 len -= sizeof(ifgrq);
1698 * Return counter values from counter(9)s stored in ifnet.
1701 if_get_counter_default(struct ifnet *ifp, ift_counter cnt)
1704 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1706 return (counter_u64_fetch(ifp->if_counters[cnt]));
1710 * Increase an ifnet counter. Usually used for counters shared
1711 * between the stack and a driver, but function supports them all.
1714 if_inc_counter(struct ifnet *ifp, ift_counter cnt, int64_t inc)
1717 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1719 counter_u64_add(ifp->if_counters[cnt], inc);
1723 * Copy data from ifnet to userland API structure if_data.
1726 if_data_copy(struct ifnet *ifp, struct if_data *ifd)
1729 ifd->ifi_type = ifp->if_type;
1730 ifd->ifi_physical = 0;
1731 ifd->ifi_addrlen = ifp->if_addrlen;
1732 ifd->ifi_hdrlen = ifp->if_hdrlen;
1733 ifd->ifi_link_state = ifp->if_link_state;
1735 ifd->ifi_datalen = sizeof(struct if_data);
1736 ifd->ifi_mtu = ifp->if_mtu;
1737 ifd->ifi_metric = ifp->if_metric;
1738 ifd->ifi_baudrate = ifp->if_baudrate;
1739 ifd->ifi_hwassist = ifp->if_hwassist;
1740 ifd->ifi_epoch = ifp->if_epoch;
1741 ifd->ifi_lastchange = ifp->if_lastchange;
1743 ifd->ifi_ipackets = ifp->if_get_counter(ifp, IFCOUNTER_IPACKETS);
1744 ifd->ifi_ierrors = ifp->if_get_counter(ifp, IFCOUNTER_IERRORS);
1745 ifd->ifi_opackets = ifp->if_get_counter(ifp, IFCOUNTER_OPACKETS);
1746 ifd->ifi_oerrors = ifp->if_get_counter(ifp, IFCOUNTER_OERRORS);
1747 ifd->ifi_collisions = ifp->if_get_counter(ifp, IFCOUNTER_COLLISIONS);
1748 ifd->ifi_ibytes = ifp->if_get_counter(ifp, IFCOUNTER_IBYTES);
1749 ifd->ifi_obytes = ifp->if_get_counter(ifp, IFCOUNTER_OBYTES);
1750 ifd->ifi_imcasts = ifp->if_get_counter(ifp, IFCOUNTER_IMCASTS);
1751 ifd->ifi_omcasts = ifp->if_get_counter(ifp, IFCOUNTER_OMCASTS);
1752 ifd->ifi_iqdrops = ifp->if_get_counter(ifp, IFCOUNTER_IQDROPS);
1753 ifd->ifi_oqdrops = ifp->if_get_counter(ifp, IFCOUNTER_OQDROPS);
1754 ifd->ifi_noproto = ifp->if_get_counter(ifp, IFCOUNTER_NOPROTO);
1758 * Wrapper functions for struct ifnet address list locking macros. These are
1759 * used by kernel modules to avoid encoding programming interface or binary
1760 * interface assumptions that may be violated when kernel-internal locking
1761 * approaches change.
1764 if_addr_rlock(struct ifnet *ifp)
1767 epoch_enter_preempt(net_epoch_preempt, curthread->td_et);
1771 if_addr_runlock(struct ifnet *ifp)
1774 epoch_exit_preempt(net_epoch_preempt, curthread->td_et);
1778 if_maddr_rlock(if_t ifp)
1781 epoch_enter_preempt(net_epoch_preempt, curthread->td_et);
1785 if_maddr_runlock(if_t ifp)
1788 epoch_exit_preempt(net_epoch_preempt, curthread->td_et);
1792 * Initialization, destruction and refcounting functions for ifaddrs.
1795 ifa_alloc(size_t size, int flags)
1799 KASSERT(size >= sizeof(struct ifaddr),
1800 ("%s: invalid size %zu", __func__, size));
1802 ifa = malloc(size, M_IFADDR, M_ZERO | flags);
1806 if ((ifa->ifa_opackets = counter_u64_alloc(flags)) == NULL)
1808 if ((ifa->ifa_ipackets = counter_u64_alloc(flags)) == NULL)
1810 if ((ifa->ifa_obytes = counter_u64_alloc(flags)) == NULL)
1812 if ((ifa->ifa_ibytes = counter_u64_alloc(flags)) == NULL)
1815 refcount_init(&ifa->ifa_refcnt, 1);
1820 /* free(NULL) is okay */
1821 counter_u64_free(ifa->ifa_opackets);
1822 counter_u64_free(ifa->ifa_ipackets);
1823 counter_u64_free(ifa->ifa_obytes);
1824 counter_u64_free(ifa->ifa_ibytes);
1825 free(ifa, M_IFADDR);
1831 ifa_ref(struct ifaddr *ifa)
1834 refcount_acquire(&ifa->ifa_refcnt);
1838 ifa_destroy(epoch_context_t ctx)
1842 ifa = __containerof(ctx, struct ifaddr, ifa_epoch_ctx);
1843 counter_u64_free(ifa->ifa_opackets);
1844 counter_u64_free(ifa->ifa_ipackets);
1845 counter_u64_free(ifa->ifa_obytes);
1846 counter_u64_free(ifa->ifa_ibytes);
1847 free(ifa, M_IFADDR);
1851 ifa_free(struct ifaddr *ifa)
1854 if (refcount_release(&ifa->ifa_refcnt))
1855 epoch_call(net_epoch_preempt, &ifa->ifa_epoch_ctx, ifa_destroy);
1860 ifa_maintain_loopback_route(int cmd, const char *otype, struct ifaddr *ifa,
1861 struct sockaddr *ia)
1864 struct rt_addrinfo info;
1865 struct sockaddr_dl null_sdl;
1870 bzero(&info, sizeof(info));
1871 if (cmd != RTM_DELETE)
1872 info.rti_ifp = V_loif;
1873 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC | RTF_PINNED;
1874 info.rti_info[RTAX_DST] = ia;
1875 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl;
1876 link_init_sdl(ifp, (struct sockaddr *)&null_sdl, ifp->if_type);
1878 error = rtrequest1_fib(cmd, &info, NULL, ifp->if_fib);
1881 !(cmd == RTM_ADD && error == EEXIST) &&
1882 !(cmd == RTM_DELETE && error == ENOENT))
1883 if_printf(ifp, "%s failed: %d\n", otype, error);
1889 ifa_add_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1892 return (ifa_maintain_loopback_route(RTM_ADD, "insertion", ifa, ia));
1896 ifa_del_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1899 return (ifa_maintain_loopback_route(RTM_DELETE, "deletion", ifa, ia));
1903 ifa_switch_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1906 return (ifa_maintain_loopback_route(RTM_CHANGE, "switch", ifa, ia));
1910 * XXX: Because sockaddr_dl has deeper structure than the sockaddr
1911 * structs used to represent other address families, it is necessary
1912 * to perform a different comparison.
1915 #define sa_dl_equal(a1, a2) \
1916 ((((const struct sockaddr_dl *)(a1))->sdl_len == \
1917 ((const struct sockaddr_dl *)(a2))->sdl_len) && \
1918 (bcmp(CLLADDR((const struct sockaddr_dl *)(a1)), \
1919 CLLADDR((const struct sockaddr_dl *)(a2)), \
1920 ((const struct sockaddr_dl *)(a1))->sdl_alen) == 0))
1923 * Locate an interface based on a complete address.
1927 ifa_ifwithaddr(const struct sockaddr *addr)
1932 MPASS(in_epoch(net_epoch_preempt));
1933 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1934 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1935 if (ifa->ifa_addr->sa_family != addr->sa_family)
1937 if (sa_equal(addr, ifa->ifa_addr)) {
1940 /* IP6 doesn't have broadcast */
1941 if ((ifp->if_flags & IFF_BROADCAST) &&
1942 ifa->ifa_broadaddr &&
1943 ifa->ifa_broadaddr->sa_len != 0 &&
1944 sa_equal(ifa->ifa_broadaddr, addr)) {
1955 ifa_ifwithaddr_check(const struct sockaddr *addr)
1960 rc = (ifa_ifwithaddr(addr) != NULL);
1966 * Locate an interface based on the broadcast address.
1970 ifa_ifwithbroadaddr(const struct sockaddr *addr, int fibnum)
1975 MPASS(in_epoch(net_epoch_preempt));
1976 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1977 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1979 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1980 if (ifa->ifa_addr->sa_family != addr->sa_family)
1982 if ((ifp->if_flags & IFF_BROADCAST) &&
1983 ifa->ifa_broadaddr &&
1984 ifa->ifa_broadaddr->sa_len != 0 &&
1985 sa_equal(ifa->ifa_broadaddr, addr)) {
1996 * Locate the point to point interface with a given destination address.
2000 ifa_ifwithdstaddr(const struct sockaddr *addr, int fibnum)
2005 MPASS(in_epoch(net_epoch_preempt));
2006 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2007 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
2009 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
2011 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2012 if (ifa->ifa_addr->sa_family != addr->sa_family)
2014 if (ifa->ifa_dstaddr != NULL &&
2015 sa_equal(addr, ifa->ifa_dstaddr)) {
2026 * Find an interface on a specific network. If many, choice
2027 * is most specific found.
2030 ifa_ifwithnet(const struct sockaddr *addr, int ignore_ptp, int fibnum)
2034 struct ifaddr *ifa_maybe = NULL;
2035 u_int af = addr->sa_family;
2036 const char *addr_data = addr->sa_data, *cplim;
2038 MPASS(in_epoch(net_epoch_preempt));
2040 * AF_LINK addresses can be looked up directly by their index number,
2041 * so do that if we can.
2043 if (af == AF_LINK) {
2044 const struct sockaddr_dl *sdl = (const struct sockaddr_dl *)addr;
2045 if (sdl->sdl_index && sdl->sdl_index <= V_if_index)
2046 return (ifaddr_byindex(sdl->sdl_index));
2050 * Scan though each interface, looking for ones that have addresses
2051 * in this address family and the requested fib. Maintain a reference
2052 * on ifa_maybe once we find one, as we release the IF_ADDR_RLOCK() that
2053 * kept it stable when we move onto the next interface.
2055 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2056 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
2058 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2059 const char *cp, *cp2, *cp3;
2061 if (ifa->ifa_addr->sa_family != af)
2063 if (af == AF_INET &&
2064 ifp->if_flags & IFF_POINTOPOINT && !ignore_ptp) {
2066 * This is a bit broken as it doesn't
2067 * take into account that the remote end may
2068 * be a single node in the network we are
2070 * The trouble is that we don't know the
2071 * netmask for the remote end.
2073 if (ifa->ifa_dstaddr != NULL &&
2074 sa_equal(addr, ifa->ifa_dstaddr)) {
2079 * Scan all the bits in the ifa's address.
2080 * If a bit dissagrees with what we are
2081 * looking for, mask it with the netmask
2082 * to see if it really matters.
2083 * (A byte at a time)
2085 if (ifa->ifa_netmask == 0)
2088 cp2 = ifa->ifa_addr->sa_data;
2089 cp3 = ifa->ifa_netmask->sa_data;
2090 cplim = ifa->ifa_netmask->sa_len
2091 + (char *)ifa->ifa_netmask;
2093 if ((*cp++ ^ *cp2++) & *cp3++)
2094 goto next; /* next address! */
2096 * If the netmask of what we just found
2097 * is more specific than what we had before
2098 * (if we had one), or if the virtual status
2099 * of new prefix is better than of the old one,
2100 * then remember the new one before continuing
2101 * to search for an even better one.
2103 if (ifa_maybe == NULL ||
2104 ifa_preferred(ifa_maybe, ifa) ||
2105 rn_refines((caddr_t)ifa->ifa_netmask,
2106 (caddr_t)ifa_maybe->ifa_netmask)) {
2119 * Find an interface address specific to an interface best matching
2123 ifaof_ifpforaddr(const struct sockaddr *addr, struct ifnet *ifp)
2126 const char *cp, *cp2, *cp3;
2128 struct ifaddr *ifa_maybe = NULL;
2129 u_int af = addr->sa_family;
2134 MPASS(in_epoch(net_epoch_preempt));
2135 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2136 if (ifa->ifa_addr->sa_family != af)
2138 if (ifa_maybe == NULL)
2140 if (ifa->ifa_netmask == 0) {
2141 if (sa_equal(addr, ifa->ifa_addr) ||
2142 (ifa->ifa_dstaddr &&
2143 sa_equal(addr, ifa->ifa_dstaddr)))
2147 if (ifp->if_flags & IFF_POINTOPOINT) {
2148 if (sa_equal(addr, ifa->ifa_dstaddr))
2152 cp2 = ifa->ifa_addr->sa_data;
2153 cp3 = ifa->ifa_netmask->sa_data;
2154 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
2155 for (; cp3 < cplim; cp3++)
2156 if ((*cp++ ^ *cp2++) & *cp3)
2168 * See whether new ifa is better than current one:
2169 * 1) A non-virtual one is preferred over virtual.
2170 * 2) A virtual in master state preferred over any other state.
2172 * Used in several address selecting functions.
2175 ifa_preferred(struct ifaddr *cur, struct ifaddr *next)
2178 return (cur->ifa_carp && (!next->ifa_carp ||
2179 ((*carp_master_p)(next) && !(*carp_master_p)(cur))));
2182 #include <net/if_llatbl.h>
2185 * Default action when installing a route with a Link Level gateway.
2186 * Lookup an appropriate real ifa to point to.
2187 * This should be moved to /sys/net/link.c eventually.
2190 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info)
2192 struct ifaddr *ifa, *oifa;
2193 struct sockaddr *dst;
2196 if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == NULL) ||
2197 ((ifp = ifa->ifa_ifp) == NULL) || ((dst = rt_key(rt)) == NULL))
2200 ifa = ifaof_ifpforaddr(dst, ifp);
2208 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest)
2209 ifa->ifa_rtrequest(cmd, rt, info);
2214 struct sockaddr_dl *
2215 link_alloc_sdl(size_t size, int flags)
2218 return (malloc(size, M_TEMP, flags));
2222 link_free_sdl(struct sockaddr *sa)
2228 * Fills in given sdl with interface basic info.
2229 * Returns pointer to filled sdl.
2231 struct sockaddr_dl *
2232 link_init_sdl(struct ifnet *ifp, struct sockaddr *paddr, u_char iftype)
2234 struct sockaddr_dl *sdl;
2236 sdl = (struct sockaddr_dl *)paddr;
2237 memset(sdl, 0, sizeof(struct sockaddr_dl));
2238 sdl->sdl_len = sizeof(struct sockaddr_dl);
2239 sdl->sdl_family = AF_LINK;
2240 sdl->sdl_index = ifp->if_index;
2241 sdl->sdl_type = iftype;
2247 * Mark an interface down and notify protocols of
2251 if_unroute(struct ifnet *ifp, int flag, int fam)
2255 KASSERT(flag == IFF_UP, ("if_unroute: flag != IFF_UP"));
2257 ifp->if_flags &= ~flag;
2258 getmicrotime(&ifp->if_lastchange);
2259 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
2260 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
2261 pfctlinput(PRC_IFDOWN, ifa->ifa_addr);
2262 ifp->if_qflush(ifp);
2265 (*carp_linkstate_p)(ifp);
2270 * Mark an interface up and notify protocols of
2274 if_route(struct ifnet *ifp, int flag, int fam)
2278 KASSERT(flag == IFF_UP, ("if_route: flag != IFF_UP"));
2280 ifp->if_flags |= flag;
2281 getmicrotime(&ifp->if_lastchange);
2282 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
2283 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
2284 pfctlinput(PRC_IFUP, ifa->ifa_addr);
2286 (*carp_linkstate_p)(ifp);
2293 void (*vlan_link_state_p)(struct ifnet *); /* XXX: private from if_vlan */
2294 void (*vlan_trunk_cap_p)(struct ifnet *); /* XXX: private from if_vlan */
2295 struct ifnet *(*vlan_trunkdev_p)(struct ifnet *);
2296 struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t);
2297 int (*vlan_tag_p)(struct ifnet *, uint16_t *);
2298 int (*vlan_pcp_p)(struct ifnet *, uint16_t *);
2299 int (*vlan_setcookie_p)(struct ifnet *, void *);
2300 void *(*vlan_cookie_p)(struct ifnet *);
2303 * Handle a change in the interface link state. To avoid LORs
2304 * between driver lock and upper layer locks, as well as possible
2305 * recursions, we post event to taskqueue, and all job
2306 * is done in static do_link_state_change().
2309 if_link_state_change(struct ifnet *ifp, int link_state)
2311 /* Return if state hasn't changed. */
2312 if (ifp->if_link_state == link_state)
2315 ifp->if_link_state = link_state;
2317 taskqueue_enqueue(taskqueue_swi, &ifp->if_linktask);
2321 do_link_state_change(void *arg, int pending)
2323 struct ifnet *ifp = (struct ifnet *)arg;
2324 int link_state = ifp->if_link_state;
2325 CURVNET_SET(ifp->if_vnet);
2327 /* Notify that the link state has changed. */
2329 if (ifp->if_vlantrunk != NULL)
2330 (*vlan_link_state_p)(ifp);
2332 if ((ifp->if_type == IFT_ETHER || ifp->if_type == IFT_L2VLAN) &&
2333 ifp->if_l2com != NULL)
2334 (*ng_ether_link_state_p)(ifp, link_state);
2336 (*carp_linkstate_p)(ifp);
2338 ifp->if_bridge_linkstate(ifp);
2340 (*lagg_linkstate_p)(ifp, link_state);
2342 if (IS_DEFAULT_VNET(curvnet))
2343 devctl_notify("IFNET", ifp->if_xname,
2344 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN",
2347 if_printf(ifp, "%d link states coalesced\n", pending);
2348 if (log_link_state_change)
2349 if_printf(ifp, "link state changed to %s\n",
2350 (link_state == LINK_STATE_UP) ? "UP" : "DOWN" );
2351 EVENTHANDLER_INVOKE(ifnet_link_event, ifp, link_state);
2356 * Mark an interface down and notify protocols of
2360 if_down(struct ifnet *ifp)
2363 EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_DOWN);
2364 if_unroute(ifp, IFF_UP, AF_UNSPEC);
2368 * Mark an interface up and notify protocols of
2372 if_up(struct ifnet *ifp)
2375 if_route(ifp, IFF_UP, AF_UNSPEC);
2376 EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_UP);
2380 * Flush an interface queue.
2383 if_qflush(struct ifnet *ifp)
2391 if (ALTQ_IS_ENABLED(ifq))
2395 while ((m = n) != NULL) {
2406 * Map interface name to interface structure pointer, with or without
2407 * returning a reference.
2410 ifunit_ref(const char *name)
2414 IFNET_RLOCK_NOSLEEP();
2415 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2416 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0 &&
2417 !(ifp->if_flags & IFF_DYING))
2422 IFNET_RUNLOCK_NOSLEEP();
2427 ifunit(const char *name)
2431 IFNET_RLOCK_NOSLEEP();
2432 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2433 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0)
2436 IFNET_RUNLOCK_NOSLEEP();
2441 ifr_buffer_get_buffer(void *data)
2443 union ifreq_union *ifrup;
2446 #ifdef COMPAT_FREEBSD32
2447 if (SV_CURPROC_FLAG(SV_ILP32))
2448 return ((void *)(uintptr_t)
2449 ifrup->ifr32.ifr_ifru.ifru_buffer.buffer);
2451 return (ifrup->ifr.ifr_ifru.ifru_buffer.buffer);
2455 ifr_buffer_set_buffer_null(void *data)
2457 union ifreq_union *ifrup;
2460 #ifdef COMPAT_FREEBSD32
2461 if (SV_CURPROC_FLAG(SV_ILP32))
2462 ifrup->ifr32.ifr_ifru.ifru_buffer.buffer = 0;
2465 ifrup->ifr.ifr_ifru.ifru_buffer.buffer = NULL;
2469 ifr_buffer_get_length(void *data)
2471 union ifreq_union *ifrup;
2474 #ifdef COMPAT_FREEBSD32
2475 if (SV_CURPROC_FLAG(SV_ILP32))
2476 return (ifrup->ifr32.ifr_ifru.ifru_buffer.length);
2478 return (ifrup->ifr.ifr_ifru.ifru_buffer.length);
2482 ifr_buffer_set_length(void *data, size_t len)
2484 union ifreq_union *ifrup;
2487 #ifdef COMPAT_FREEBSD32
2488 if (SV_CURPROC_FLAG(SV_ILP32))
2489 ifrup->ifr32.ifr_ifru.ifru_buffer.length = len;
2492 ifrup->ifr.ifr_ifru.ifru_buffer.length = len;
2496 ifr_data_get_ptr(void *ifrp)
2498 union ifreq_union *ifrup;
2501 #ifdef COMPAT_FREEBSD32
2502 if (SV_CURPROC_FLAG(SV_ILP32))
2503 return ((void *)(uintptr_t)
2504 ifrup->ifr32.ifr_ifru.ifru_data);
2506 return (ifrup->ifr.ifr_ifru.ifru_data);
2510 * Hardware specific interface ioctls.
2513 ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td)
2516 int error = 0, do_ifup = 0;
2517 int new_flags, temp_flags;
2518 size_t namelen, onamelen;
2520 char *descrbuf, *odescrbuf;
2521 char new_name[IFNAMSIZ];
2523 struct sockaddr_dl *sdl;
2525 ifr = (struct ifreq *)data;
2528 ifr->ifr_index = ifp->if_index;
2532 temp_flags = ifp->if_flags | ifp->if_drv_flags;
2533 ifr->ifr_flags = temp_flags & 0xffff;
2534 ifr->ifr_flagshigh = temp_flags >> 16;
2538 ifr->ifr_reqcap = ifp->if_capabilities;
2539 ifr->ifr_curcap = ifp->if_capenable;
2544 error = mac_ifnet_ioctl_get(td->td_ucred, ifr, ifp);
2549 ifr->ifr_metric = ifp->if_metric;
2553 ifr->ifr_mtu = ifp->if_mtu;
2557 /* XXXGL: did this ever worked? */
2563 sx_slock(&ifdescr_sx);
2564 if (ifp->if_description == NULL)
2567 /* space for terminating nul */
2568 descrlen = strlen(ifp->if_description) + 1;
2569 if (ifr_buffer_get_length(ifr) < descrlen)
2570 ifr_buffer_set_buffer_null(ifr);
2572 error = copyout(ifp->if_description,
2573 ifr_buffer_get_buffer(ifr), descrlen);
2574 ifr_buffer_set_length(ifr, descrlen);
2576 sx_sunlock(&ifdescr_sx);
2580 error = priv_check(td, PRIV_NET_SETIFDESCR);
2585 * Copy only (length-1) bytes to make sure that
2586 * if_description is always nul terminated. The
2587 * length parameter is supposed to count the
2588 * terminating nul in.
2590 if (ifr_buffer_get_length(ifr) > ifdescr_maxlen)
2591 return (ENAMETOOLONG);
2592 else if (ifr_buffer_get_length(ifr) == 0)
2595 descrbuf = malloc(ifr_buffer_get_length(ifr),
2596 M_IFDESCR, M_WAITOK | M_ZERO);
2597 error = copyin(ifr_buffer_get_buffer(ifr), descrbuf,
2598 ifr_buffer_get_length(ifr) - 1);
2600 free(descrbuf, M_IFDESCR);
2605 sx_xlock(&ifdescr_sx);
2606 odescrbuf = ifp->if_description;
2607 ifp->if_description = descrbuf;
2608 sx_xunlock(&ifdescr_sx);
2610 getmicrotime(&ifp->if_lastchange);
2611 free(odescrbuf, M_IFDESCR);
2615 ifr->ifr_fib = ifp->if_fib;
2619 error = priv_check(td, PRIV_NET_SETIFFIB);
2622 if (ifr->ifr_fib >= rt_numfibs)
2625 ifp->if_fib = ifr->ifr_fib;
2629 error = priv_check(td, PRIV_NET_SETIFFLAGS);
2633 * Currently, no driver owned flags pass the IFF_CANTCHANGE
2634 * check, so we don't need special handling here yet.
2636 new_flags = (ifr->ifr_flags & 0xffff) |
2637 (ifr->ifr_flagshigh << 16);
2638 if (ifp->if_flags & IFF_UP &&
2639 (new_flags & IFF_UP) == 0) {
2641 } else if (new_flags & IFF_UP &&
2642 (ifp->if_flags & IFF_UP) == 0) {
2645 /* See if permanently promiscuous mode bit is about to flip */
2646 if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) {
2647 if (new_flags & IFF_PPROMISC)
2648 ifp->if_flags |= IFF_PROMISC;
2649 else if (ifp->if_pcount == 0)
2650 ifp->if_flags &= ~IFF_PROMISC;
2651 if (log_promisc_mode_change)
2652 if_printf(ifp, "permanently promiscuous mode %s\n",
2653 ((new_flags & IFF_PPROMISC) ?
2654 "enabled" : "disabled"));
2656 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
2657 (new_flags &~ IFF_CANTCHANGE);
2658 if (ifp->if_ioctl) {
2659 (void) (*ifp->if_ioctl)(ifp, cmd, data);
2663 getmicrotime(&ifp->if_lastchange);
2667 error = priv_check(td, PRIV_NET_SETIFCAP);
2670 if (ifp->if_ioctl == NULL)
2671 return (EOPNOTSUPP);
2672 if (ifr->ifr_reqcap & ~ifp->if_capabilities)
2674 error = (*ifp->if_ioctl)(ifp, cmd, data);
2676 getmicrotime(&ifp->if_lastchange);
2681 error = mac_ifnet_ioctl_set(td->td_ucred, ifr, ifp);
2686 error = priv_check(td, PRIV_NET_SETIFNAME);
2689 error = copyinstr(ifr_data_get_ptr(ifr), new_name, IFNAMSIZ,
2693 if (new_name[0] == '\0')
2695 if (new_name[IFNAMSIZ-1] != '\0') {
2696 new_name[IFNAMSIZ-1] = '\0';
2697 if (strlen(new_name) == IFNAMSIZ-1)
2700 if (ifunit(new_name) != NULL)
2704 * XXX: Locking. Nothing else seems to lock if_flags,
2705 * and there are numerous other races with the
2706 * ifunit() checks not being atomic with namespace
2707 * changes (renames, vmoves, if_attach, etc).
2709 ifp->if_flags |= IFF_RENAMING;
2711 /* Announce the departure of the interface. */
2712 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
2713 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
2715 if_printf(ifp, "changing name to '%s'\n", new_name);
2718 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname));
2720 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
2721 namelen = strlen(new_name);
2722 onamelen = sdl->sdl_nlen;
2724 * Move the address if needed. This is safe because we
2725 * allocate space for a name of length IFNAMSIZ when we
2726 * create this in if_attach().
2728 if (namelen != onamelen) {
2729 bcopy(sdl->sdl_data + onamelen,
2730 sdl->sdl_data + namelen, sdl->sdl_alen);
2732 bcopy(new_name, sdl->sdl_data, namelen);
2733 sdl->sdl_nlen = namelen;
2734 sdl = (struct sockaddr_dl *)ifa->ifa_netmask;
2735 bzero(sdl->sdl_data, onamelen);
2736 while (namelen != 0)
2737 sdl->sdl_data[--namelen] = 0xff;
2738 IF_ADDR_WUNLOCK(ifp);
2740 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
2741 /* Announce the return of the interface. */
2742 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
2744 ifp->if_flags &= ~IFF_RENAMING;
2749 error = priv_check(td, PRIV_NET_SETIFVNET);
2752 error = if_vmove_loan(td, ifp, ifr->ifr_name, ifr->ifr_jid);
2757 error = priv_check(td, PRIV_NET_SETIFMETRIC);
2760 ifp->if_metric = ifr->ifr_metric;
2761 getmicrotime(&ifp->if_lastchange);
2765 error = priv_check(td, PRIV_NET_SETIFPHYS);
2768 if (ifp->if_ioctl == NULL)
2769 return (EOPNOTSUPP);
2770 error = (*ifp->if_ioctl)(ifp, cmd, data);
2772 getmicrotime(&ifp->if_lastchange);
2777 u_long oldmtu = ifp->if_mtu;
2779 error = priv_check(td, PRIV_NET_SETIFMTU);
2782 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU)
2784 if (ifp->if_ioctl == NULL)
2785 return (EOPNOTSUPP);
2786 error = (*ifp->if_ioctl)(ifp, cmd, data);
2788 getmicrotime(&ifp->if_lastchange);
2791 NETDUMP_REINIT(ifp);
2795 * If the link MTU changed, do network layer specific procedure.
2797 if (ifp->if_mtu != oldmtu) {
2808 if (cmd == SIOCADDMULTI)
2809 error = priv_check(td, PRIV_NET_ADDMULTI);
2811 error = priv_check(td, PRIV_NET_DELMULTI);
2815 /* Don't allow group membership on non-multicast interfaces. */
2816 if ((ifp->if_flags & IFF_MULTICAST) == 0)
2817 return (EOPNOTSUPP);
2819 /* Don't let users screw up protocols' entries. */
2820 if (ifr->ifr_addr.sa_family != AF_LINK)
2823 if (cmd == SIOCADDMULTI) {
2824 struct ifmultiaddr *ifma;
2827 * Userland is only permitted to join groups once
2828 * via the if_addmulti() KPI, because it cannot hold
2829 * struct ifmultiaddr * between calls. It may also
2830 * lose a race while we check if the membership
2834 ifma = if_findmulti(ifp, &ifr->ifr_addr);
2835 IF_ADDR_RUNLOCK(ifp);
2839 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma);
2841 error = if_delmulti(ifp, &ifr->ifr_addr);
2844 getmicrotime(&ifp->if_lastchange);
2847 case SIOCSIFPHYADDR:
2848 case SIOCDIFPHYADDR:
2850 case SIOCSIFPHYADDR_IN6:
2853 case SIOCSIFGENERIC:
2854 error = priv_check(td, PRIV_NET_HWIOCTL);
2857 if (ifp->if_ioctl == NULL)
2858 return (EOPNOTSUPP);
2859 error = (*ifp->if_ioctl)(ifp, cmd, data);
2861 getmicrotime(&ifp->if_lastchange);
2865 case SIOCGIFPSRCADDR:
2866 case SIOCGIFPDSTADDR:
2869 case SIOCGIFGENERIC:
2871 case SIOCGIFRSSHASH:
2872 if (ifp->if_ioctl == NULL)
2873 return (EOPNOTSUPP);
2874 error = (*ifp->if_ioctl)(ifp, cmd, data);
2878 error = priv_check(td, PRIV_NET_SETLLADDR);
2881 error = if_setlladdr(ifp,
2882 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len);
2886 error = if_gethwaddr(ifp, ifr);
2889 CASE_IOC_IFGROUPREQ(SIOCAIFGROUP):
2890 error = priv_check(td, PRIV_NET_ADDIFGROUP);
2893 if ((error = if_addgroup(ifp,
2894 ifgr_group_get((struct ifgroupreq *)data))))
2898 CASE_IOC_IFGROUPREQ(SIOCGIFGROUP):
2899 if ((error = if_getgroup((struct ifgroupreq *)data, ifp)))
2903 CASE_IOC_IFGROUPREQ(SIOCDIFGROUP):
2904 error = priv_check(td, PRIV_NET_DELIFGROUP);
2907 if ((error = if_delgroup(ifp,
2908 ifgr_group_get((struct ifgroupreq *)data))))
2919 #ifdef COMPAT_FREEBSD32
2927 #define SIOCGIFCONF32 _IOWR('i', 36, struct ifconf32)
2930 #ifdef COMPAT_FREEBSD32
2932 ifmr_init(struct ifmediareq *ifmr, caddr_t data)
2934 struct ifmediareq32 *ifmr32;
2936 ifmr32 = (struct ifmediareq32 *)data;
2937 memcpy(ifmr->ifm_name, ifmr32->ifm_name,
2938 sizeof(ifmr->ifm_name));
2939 ifmr->ifm_current = ifmr32->ifm_current;
2940 ifmr->ifm_mask = ifmr32->ifm_mask;
2941 ifmr->ifm_status = ifmr32->ifm_status;
2942 ifmr->ifm_active = ifmr32->ifm_active;
2943 ifmr->ifm_count = ifmr32->ifm_count;
2944 ifmr->ifm_ulist = (int *)(uintptr_t)ifmr32->ifm_ulist;
2948 ifmr_update(const struct ifmediareq *ifmr, caddr_t data)
2950 struct ifmediareq32 *ifmr32;
2952 ifmr32 = (struct ifmediareq32 *)data;
2953 ifmr32->ifm_current = ifmr->ifm_current;
2954 ifmr32->ifm_mask = ifmr->ifm_mask;
2955 ifmr32->ifm_status = ifmr->ifm_status;
2956 ifmr32->ifm_active = ifmr->ifm_active;
2957 ifmr32->ifm_count = ifmr->ifm_count;
2965 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td)
2967 #ifdef COMPAT_FREEBSD32
2968 caddr_t saved_data = NULL;
2969 struct ifmediareq ifmr;
2970 struct ifmediareq *ifmrp;
2980 CURVNET_SET(so->so_vnet);
2982 /* Make sure the VNET is stable. */
2983 shutdown = (so->so_vnet->vnet_state > SI_SUB_VNET &&
2984 so->so_vnet->vnet_state < SI_SUB_VNET_DONE) ? 1 : 0;
2994 error = ifconf(cmd, data);
2998 #ifdef COMPAT_FREEBSD32
3001 struct ifconf32 *ifc32;
3004 ifc32 = (struct ifconf32 *)data;
3005 ifc.ifc_len = ifc32->ifc_len;
3006 ifc.ifc_buf = PTRIN(ifc32->ifc_buf);
3008 error = ifconf(SIOCGIFCONF, (void *)&ifc);
3011 ifc32->ifc_len = ifc.ifc_len;
3017 #ifdef COMPAT_FREEBSD32
3020 case SIOCGIFMEDIA32:
3021 case SIOCGIFXMEDIA32:
3023 ifmr_init(ifmrp, data);
3024 cmd = _IOC_NEWTYPE(cmd, struct ifmediareq);
3026 data = (caddr_t)ifmrp;
3030 ifr = (struct ifreq *)data;
3034 error = priv_check(td, PRIV_NET_SETIFVNET);
3036 error = if_vmove_reclaim(td, ifr->ifr_name,
3042 error = priv_check(td, PRIV_NET_IFCREATE);
3044 error = if_clone_create(ifr->ifr_name,
3045 sizeof(ifr->ifr_name), cmd == SIOCIFCREATE2 ?
3046 ifr_data_get_ptr(ifr) : NULL);
3049 error = priv_check(td, PRIV_NET_IFDESTROY);
3051 error = if_clone_destroy(ifr->ifr_name);
3054 case SIOCIFGCLONERS:
3055 error = if_clone_list((struct if_clonereq *)data);
3058 CASE_IOC_IFGROUPREQ(SIOCGIFGMEMB):
3059 error = if_getgroupmembers((struct ifgroupreq *)data);
3062 #if defined(INET) || defined(INET6)
3065 if (carp_ioctl_p == NULL)
3066 error = EPROTONOSUPPORT;
3068 error = (*carp_ioctl_p)(ifr, cmd, td);
3073 ifp = ifunit_ref(ifr->ifr_name);
3079 error = ifhwioctl(cmd, ifp, data, td);
3080 if (error != ENOIOCTL)
3083 oif_flags = ifp->if_flags;
3084 if (so->so_proto == NULL) {
3090 * Pass the request on to the socket control method, and if the
3091 * latter returns EOPNOTSUPP, directly to the interface.
3093 * Make an exception for the legacy SIOCSIF* requests. Drivers
3094 * trust SIOCSIFADDR et al to come from an already privileged
3095 * layer, and do not perform any credentials checks or input
3098 error = ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data,
3100 if (error == EOPNOTSUPP && ifp != NULL && ifp->if_ioctl != NULL &&
3101 cmd != SIOCSIFADDR && cmd != SIOCSIFBRDADDR &&
3102 cmd != SIOCSIFDSTADDR && cmd != SIOCSIFNETMASK)
3103 error = (*ifp->if_ioctl)(ifp, cmd, data);
3105 if ((oif_flags ^ ifp->if_flags) & IFF_UP) {
3107 if (ifp->if_flags & IFF_UP)
3115 #ifdef COMPAT_FREEBSD32
3116 if (ifmrp != NULL) {
3117 KASSERT((cmd == SIOCGIFMEDIA || cmd == SIOCGIFXMEDIA),
3118 ("ifmrp non-NULL, but cmd is not an ifmedia req 0x%lx",
3121 ifmr_update(ifmrp, data);
3129 * The code common to handling reference counted flags,
3130 * e.g., in ifpromisc() and if_allmulti().
3131 * The "pflag" argument can specify a permanent mode flag to check,
3132 * such as IFF_PPROMISC for promiscuous mode; should be 0 if none.
3134 * Only to be used on stack-owned flags, not driver-owned flags.
3137 if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch)
3141 int oldflags, oldcount;
3143 /* Sanity checks to catch programming errors */
3144 KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0,
3145 ("%s: setting driver-owned flag %d", __func__, flag));
3148 KASSERT(*refcount >= 0,
3149 ("%s: increment negative refcount %d for flag %d",
3150 __func__, *refcount, flag));
3152 KASSERT(*refcount > 0,
3153 ("%s: decrement non-positive refcount %d for flag %d",
3154 __func__, *refcount, flag));
3156 /* In case this mode is permanent, just touch refcount */
3157 if (ifp->if_flags & pflag) {
3158 *refcount += onswitch ? 1 : -1;
3162 /* Save ifnet parameters for if_ioctl() may fail */
3163 oldcount = *refcount;
3164 oldflags = ifp->if_flags;
3167 * See if we aren't the only and touching refcount is enough.
3168 * Actually toggle interface flag if we are the first or last.
3173 ifp->if_flags |= flag;
3177 ifp->if_flags &= ~flag;
3180 /* Call down the driver since we've changed interface flags */
3181 if (ifp->if_ioctl == NULL) {
3185 ifr.ifr_flags = ifp->if_flags & 0xffff;
3186 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3187 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3190 /* Notify userland that interface flags have changed */
3195 /* Recover after driver error */
3196 *refcount = oldcount;
3197 ifp->if_flags = oldflags;
3202 * Set/clear promiscuous mode on interface ifp based on the truth value
3203 * of pswitch. The calls are reference counted so that only the first
3204 * "on" request actually has an effect, as does the final "off" request.
3205 * Results are undefined if the "off" and "on" requests are not matched.
3208 ifpromisc(struct ifnet *ifp, int pswitch)
3211 int oldflags = ifp->if_flags;
3213 error = if_setflag(ifp, IFF_PROMISC, IFF_PPROMISC,
3214 &ifp->if_pcount, pswitch);
3215 /* If promiscuous mode status has changed, log a message */
3216 if (error == 0 && ((ifp->if_flags ^ oldflags) & IFF_PROMISC) &&
3217 log_promisc_mode_change)
3218 if_printf(ifp, "promiscuous mode %s\n",
3219 (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled");
3224 * Return interface configuration
3225 * of system. List may be used
3226 * in later ioctl's (above) to get
3227 * other information.
3231 ifconf(u_long cmd, caddr_t data)
3233 struct ifconf *ifc = (struct ifconf *)data;
3238 int error, full = 0, valid_len, max_len;
3240 /* Limit initial buffer size to MAXPHYS to avoid DoS from userspace. */
3241 max_len = MAXPHYS - 1;
3243 /* Prevent hostile input from being able to crash the system */
3244 if (ifc->ifc_len <= 0)
3248 if (ifc->ifc_len <= max_len) {
3249 max_len = ifc->ifc_len;
3252 sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN);
3257 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
3261 * Zero the ifr to make sure we don't disclose the contents
3264 memset(&ifr, 0, sizeof(ifr));
3266 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name))
3267 >= sizeof(ifr.ifr_name)) {
3270 return (ENAMETOOLONG);
3275 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
3276 struct sockaddr *sa = ifa->ifa_addr;
3278 if (prison_if(curthread->td_ucred, sa) != 0)
3281 if (sa->sa_len <= sizeof(*sa)) {
3282 if (sa->sa_len < sizeof(*sa)) {
3283 memset(&ifr.ifr_ifru.ifru_addr, 0,
3284 sizeof(ifr.ifr_ifru.ifru_addr));
3285 memcpy(&ifr.ifr_ifru.ifru_addr, sa,
3288 ifr.ifr_ifru.ifru_addr = *sa;
3289 sbuf_bcat(sb, &ifr, sizeof(ifr));
3290 max_len += sizeof(ifr);
3293 offsetof(struct ifreq, ifr_addr));
3294 max_len += offsetof(struct ifreq, ifr_addr);
3295 sbuf_bcat(sb, sa, sa->sa_len);
3296 max_len += sa->sa_len;
3299 if (sbuf_error(sb) == 0)
3300 valid_len = sbuf_len(sb);
3302 IF_ADDR_RUNLOCK(ifp);
3304 sbuf_bcat(sb, &ifr, sizeof(ifr));
3305 max_len += sizeof(ifr);
3307 if (sbuf_error(sb) == 0)
3308 valid_len = sbuf_len(sb);
3314 * If we didn't allocate enough space (uncommon), try again. If
3315 * we have already allocated as much space as we are allowed,
3316 * return what we've got.
3318 if (valid_len != max_len && !full) {
3323 ifc->ifc_len = valid_len;
3325 error = copyout(sbuf_data(sb), ifc->ifc_req, ifc->ifc_len);
3331 * Just like ifpromisc(), but for all-multicast-reception mode.
3334 if_allmulti(struct ifnet *ifp, int onswitch)
3337 return (if_setflag(ifp, IFF_ALLMULTI, 0, &ifp->if_amcount, onswitch));
3340 struct ifmultiaddr *
3341 if_findmulti(struct ifnet *ifp, const struct sockaddr *sa)
3343 struct ifmultiaddr *ifma;
3345 IF_ADDR_LOCK_ASSERT(ifp);
3347 CK_STAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
3348 if (sa->sa_family == AF_LINK) {
3349 if (sa_dl_equal(ifma->ifma_addr, sa))
3352 if (sa_equal(ifma->ifma_addr, sa))
3361 * Allocate a new ifmultiaddr and initialize based on passed arguments. We
3362 * make copies of passed sockaddrs. The ifmultiaddr will not be added to
3363 * the ifnet multicast address list here, so the caller must do that and
3364 * other setup work (such as notifying the device driver). The reference
3365 * count is initialized to 1.
3367 static struct ifmultiaddr *
3368 if_allocmulti(struct ifnet *ifp, struct sockaddr *sa, struct sockaddr *llsa,
3371 struct ifmultiaddr *ifma;
3372 struct sockaddr *dupsa;
3374 ifma = malloc(sizeof *ifma, M_IFMADDR, mflags |
3379 dupsa = malloc(sa->sa_len, M_IFMADDR, mflags);
3380 if (dupsa == NULL) {
3381 free(ifma, M_IFMADDR);
3384 bcopy(sa, dupsa, sa->sa_len);
3385 ifma->ifma_addr = dupsa;
3387 ifma->ifma_ifp = ifp;
3388 ifma->ifma_refcount = 1;
3389 ifma->ifma_protospec = NULL;
3392 ifma->ifma_lladdr = NULL;
3396 dupsa = malloc(llsa->sa_len, M_IFMADDR, mflags);
3397 if (dupsa == NULL) {
3398 free(ifma->ifma_addr, M_IFMADDR);
3399 free(ifma, M_IFMADDR);
3402 bcopy(llsa, dupsa, llsa->sa_len);
3403 ifma->ifma_lladdr = dupsa;
3409 * if_freemulti: free ifmultiaddr structure and possibly attached related
3410 * addresses. The caller is responsible for implementing reference
3411 * counting, notifying the driver, handling routing messages, and releasing
3412 * any dependent link layer state.
3414 #ifdef MCAST_VERBOSE
3415 extern void kdb_backtrace(void);
3418 if_freemulti_internal(struct ifmultiaddr *ifma)
3421 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti: refcount %d",
3422 ifma->ifma_refcount));
3424 if (ifma->ifma_lladdr != NULL)
3425 free(ifma->ifma_lladdr, M_IFMADDR);
3426 #ifdef MCAST_VERBOSE
3428 printf("%s freeing ifma: %p\n", __func__, ifma);
3430 free(ifma->ifma_addr, M_IFMADDR);
3431 free(ifma, M_IFMADDR);
3435 if_destroymulti(epoch_context_t ctx)
3437 struct ifmultiaddr *ifma;
3439 ifma = __containerof(ctx, struct ifmultiaddr, ifma_epoch_ctx);
3440 if_freemulti_internal(ifma);
3444 if_freemulti(struct ifmultiaddr *ifma)
3446 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti_epoch: refcount %d",
3447 ifma->ifma_refcount));
3449 epoch_call(net_epoch_preempt, &ifma->ifma_epoch_ctx, if_destroymulti);
3454 * Register an additional multicast address with a network interface.
3456 * - If the address is already present, bump the reference count on the
3457 * address and return.
3458 * - If the address is not link-layer, look up a link layer address.
3459 * - Allocate address structures for one or both addresses, and attach to the
3460 * multicast address list on the interface. If automatically adding a link
3461 * layer address, the protocol address will own a reference to the link
3462 * layer address, to be freed when it is freed.
3463 * - Notify the network device driver of an addition to the multicast address
3466 * 'sa' points to caller-owned memory with the desired multicast address.
3468 * 'retifma' will be used to return a pointer to the resulting multicast
3469 * address reference, if desired.
3472 if_addmulti(struct ifnet *ifp, struct sockaddr *sa,
3473 struct ifmultiaddr **retifma)
3475 struct ifmultiaddr *ifma, *ll_ifma;
3476 struct sockaddr *llsa;
3477 struct sockaddr_dl sdl;
3481 IN_MULTI_LIST_UNLOCK_ASSERT();
3484 IN6_MULTI_LIST_UNLOCK_ASSERT();
3487 * If the address is already present, return a new reference to it;
3488 * otherwise, allocate storage and set up a new address.
3491 ifma = if_findmulti(ifp, sa);
3493 ifma->ifma_refcount++;
3494 if (retifma != NULL)
3496 IF_ADDR_WUNLOCK(ifp);
3501 * The address isn't already present; resolve the protocol address
3502 * into a link layer address, and then look that up, bump its
3503 * refcount or allocate an ifma for that also.
3504 * Most link layer resolving functions returns address data which
3505 * fits inside default sockaddr_dl structure. However callback
3506 * can allocate another sockaddr structure, in that case we need to
3511 if (ifp->if_resolvemulti != NULL) {
3512 /* Provide called function with buffer size information */
3513 sdl.sdl_len = sizeof(sdl);
3514 llsa = (struct sockaddr *)&sdl;
3515 error = ifp->if_resolvemulti(ifp, &llsa, sa);
3521 * Allocate the new address. Don't hook it up yet, as we may also
3522 * need to allocate a link layer multicast address.
3524 ifma = if_allocmulti(ifp, sa, llsa, M_NOWAIT);
3531 * If a link layer address is found, we'll need to see if it's
3532 * already present in the address list, or allocate is as well.
3533 * When this block finishes, the link layer address will be on the
3537 ll_ifma = if_findmulti(ifp, llsa);
3538 if (ll_ifma == NULL) {
3539 ll_ifma = if_allocmulti(ifp, llsa, NULL, M_NOWAIT);
3540 if (ll_ifma == NULL) {
3541 --ifma->ifma_refcount;
3546 ll_ifma->ifma_flags |= IFMA_F_ENQUEUED;
3547 CK_STAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ll_ifma,
3550 ll_ifma->ifma_refcount++;
3551 ifma->ifma_llifma = ll_ifma;
3555 * We now have a new multicast address, ifma, and possibly a new or
3556 * referenced link layer address. Add the primary address to the
3557 * ifnet address list.
3559 ifma->ifma_flags |= IFMA_F_ENQUEUED;
3560 CK_STAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
3562 if (retifma != NULL)
3566 * Must generate the message while holding the lock so that 'ifma'
3567 * pointer is still valid.
3569 rt_newmaddrmsg(RTM_NEWMADDR, ifma);
3570 IF_ADDR_WUNLOCK(ifp);
3573 * We are certain we have added something, so call down to the
3574 * interface to let them know about it.
3576 if (ifp->if_ioctl != NULL) {
3577 (void) (*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0);
3580 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl))
3581 link_free_sdl(llsa);
3586 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl))
3587 link_free_sdl(llsa);
3590 IF_ADDR_WUNLOCK(ifp);
3595 * Delete a multicast group membership by network-layer group address.
3597 * Returns ENOENT if the entry could not be found. If ifp no longer
3598 * exists, results are undefined. This entry point should only be used
3599 * from subsystems which do appropriate locking to hold ifp for the
3600 * duration of the call.
3601 * Network-layer protocol domains must use if_delmulti_ifma().
3604 if_delmulti(struct ifnet *ifp, struct sockaddr *sa)
3606 struct ifmultiaddr *ifma;
3611 IFNET_RLOCK_NOSLEEP();
3612 CK_STAILQ_FOREACH(oifp, &V_ifnet, if_link)
3617 IFNET_RUNLOCK_NOSLEEP();
3619 KASSERT(ifp != NULL, ("%s: ifnet went away", __func__));
3626 ifma = if_findmulti(ifp, sa);
3628 lastref = if_delmulti_locked(ifp, ifma, 0);
3629 IF_ADDR_WUNLOCK(ifp);
3634 if (lastref && ifp->if_ioctl != NULL) {
3635 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
3642 * Delete all multicast group membership for an interface.
3643 * Should be used to quickly flush all multicast filters.
3646 if_delallmulti(struct ifnet *ifp)
3648 struct ifmultiaddr *ifma;
3649 struct ifmultiaddr *next;
3652 CK_STAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next)
3653 if_delmulti_locked(ifp, ifma, 0);
3654 IF_ADDR_WUNLOCK(ifp);
3658 if_delmulti_ifma(struct ifmultiaddr *ifma)
3660 if_delmulti_ifma_flags(ifma, 0);
3664 * Delete a multicast group membership by group membership pointer.
3665 * Network-layer protocol domains must use this routine.
3667 * It is safe to call this routine if the ifp disappeared.
3670 if_delmulti_ifma_flags(struct ifmultiaddr *ifma, int flags)
3674 MCDPRINTF("%s freeing ifma: %p\n", __func__, ifma);
3676 IN_MULTI_LIST_UNLOCK_ASSERT();
3678 ifp = ifma->ifma_ifp;
3681 printf("%s: ifma_ifp seems to be detached\n", __func__);
3685 IFNET_RLOCK_NOSLEEP();
3686 CK_STAILQ_FOREACH(oifp, &V_ifnet, if_link)
3691 IFNET_RUNLOCK_NOSLEEP();
3695 * If and only if the ifnet instance exists: Acquire the address lock.
3700 lastref = if_delmulti_locked(ifp, ifma, flags);
3704 * If and only if the ifnet instance exists:
3705 * Release the address lock.
3706 * If the group was left: update the hardware hash filter.
3708 IF_ADDR_WUNLOCK(ifp);
3709 if (lastref && ifp->if_ioctl != NULL) {
3710 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
3716 * Perform deletion of network-layer and/or link-layer multicast address.
3718 * Return 0 if the reference count was decremented.
3719 * Return 1 if the final reference was released, indicating that the
3720 * hardware hash filter should be reprogrammed.
3723 if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching)
3725 struct ifmultiaddr *ll_ifma;
3727 if (ifp != NULL && ifma->ifma_ifp != NULL) {
3728 KASSERT(ifma->ifma_ifp == ifp,
3729 ("%s: inconsistent ifp %p", __func__, ifp));
3730 IF_ADDR_WLOCK_ASSERT(ifp);
3733 ifp = ifma->ifma_ifp;
3734 MCDPRINTF("%s freeing %p from %s \n", __func__, ifma, ifp ? ifp->if_xname : "");
3737 * If the ifnet is detaching, null out references to ifnet,
3738 * so that upper protocol layers will notice, and not attempt
3739 * to obtain locks for an ifnet which no longer exists. The
3740 * routing socket announcement must happen before the ifnet
3741 * instance is detached from the system.
3745 printf("%s: detaching ifnet instance %p\n", __func__, ifp);
3748 * ifp may already be nulled out if we are being reentered
3749 * to delete the ll_ifma.
3752 rt_newmaddrmsg(RTM_DELMADDR, ifma);
3753 ifma->ifma_ifp = NULL;
3757 if (--ifma->ifma_refcount > 0)
3760 if (ifp != NULL && detaching == 0 && (ifma->ifma_flags & IFMA_F_ENQUEUED)) {
3761 CK_STAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifmultiaddr, ifma_link);
3762 ifma->ifma_flags &= ~IFMA_F_ENQUEUED;
3765 * If this ifma is a network-layer ifma, a link-layer ifma may
3766 * have been associated with it. Release it first if so.
3768 ll_ifma = ifma->ifma_llifma;
3769 if (ll_ifma != NULL) {
3770 KASSERT(ifma->ifma_lladdr != NULL,
3771 ("%s: llifma w/o lladdr", __func__));
3773 ll_ifma->ifma_ifp = NULL; /* XXX */
3774 if (--ll_ifma->ifma_refcount == 0) {
3776 if (ll_ifma->ifma_flags & IFMA_F_ENQUEUED) {
3777 CK_STAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma, ifmultiaddr,
3779 ll_ifma->ifma_flags &= ~IFMA_F_ENQUEUED;
3782 if_freemulti(ll_ifma);
3787 struct ifmultiaddr *ifmatmp;
3789 CK_STAILQ_FOREACH(ifmatmp, &ifp->if_multiaddrs, ifma_link)
3790 MPASS(ifma != ifmatmp);
3795 * The last reference to this instance of struct ifmultiaddr
3796 * was released; the hardware should be notified of this change.
3802 * Set the link layer address on an interface.
3804 * At this time we only support certain types of interfaces,
3805 * and we don't allow the length of the address to change.
3807 * Set noinline to be dtrace-friendly
3810 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len)
3812 struct sockaddr_dl *sdl;
3825 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
3830 if (len != sdl->sdl_alen) { /* don't allow length to change */
3834 switch (ifp->if_type) {
3839 case IFT_IEEE8023ADLAG:
3840 bcopy(lladdr, LLADDR(sdl), len);
3848 * If the interface is already up, we need
3849 * to re-init it in order to reprogram its
3853 if ((ifp->if_flags & IFF_UP) != 0) {
3854 if (ifp->if_ioctl) {
3855 ifp->if_flags &= ~IFF_UP;
3856 ifr.ifr_flags = ifp->if_flags & 0xffff;
3857 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3858 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3859 ifp->if_flags |= IFF_UP;
3860 ifr.ifr_flags = ifp->if_flags & 0xffff;
3861 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3862 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3865 EVENTHANDLER_INVOKE(iflladdr_event, ifp);
3873 * Compat function for handling basic encapsulation requests.
3874 * Not converted stacks (FDDI, IB, ..) supports traditional
3875 * output model: ARP (and other similar L2 protocols) are handled
3876 * inside output routine, arpresolve/nd6_resolve() returns MAC
3877 * address instead of full prepend.
3879 * This function creates calculated header==MAC for IPv4/IPv6 and
3880 * returns EAFNOSUPPORT (which is then handled in ARP code) for other
3884 if_requestencap_default(struct ifnet *ifp, struct if_encap_req *req)
3887 if (req->rtype != IFENCAP_LL)
3888 return (EOPNOTSUPP);
3890 if (req->bufsize < req->lladdr_len)
3893 switch (req->family) {
3898 return (EAFNOSUPPORT);
3901 /* Copy lladdr to storage as is */
3902 memmove(req->buf, req->lladdr, req->lladdr_len);
3903 req->bufsize = req->lladdr_len;
3904 req->lladdr_off = 0;
3910 * Tunnel interfaces can nest, also they may cause infinite recursion
3911 * calls when misconfigured. We'll prevent this by detecting loops.
3912 * High nesting level may cause stack exhaustion. We'll prevent this
3913 * by introducing upper limit.
3915 * Return 0, if tunnel nesting count is equal or less than limit.
3918 if_tunnel_check_nesting(struct ifnet *ifp, struct mbuf *m, uint32_t cookie,
3926 while ((mtag = m_tag_locate(m, cookie, 0, mtag)) != NULL) {
3927 if (*(struct ifnet **)(mtag + 1) == ifp) {
3928 log(LOG_NOTICE, "%s: loop detected\n", if_name(ifp));
3933 if (count > limit) {
3935 "%s: if_output recursively called too many times(%d)\n",
3936 if_name(ifp), count);
3939 mtag = m_tag_alloc(cookie, 0, sizeof(struct ifnet *), M_NOWAIT);
3942 *(struct ifnet **)(mtag + 1) = ifp;
3943 m_tag_prepend(m, mtag);
3948 * Get the link layer address that was read from the hardware at attach.
3950 * This is only set by Ethernet NICs (IFT_ETHER), but laggX interfaces re-type
3951 * their component interfaces as IFT_IEEE8023ADLAG.
3954 if_gethwaddr(struct ifnet *ifp, struct ifreq *ifr)
3957 if (ifp->if_hw_addr == NULL)
3960 switch (ifp->if_type) {
3962 case IFT_IEEE8023ADLAG:
3963 bcopy(ifp->if_hw_addr, ifr->ifr_addr.sa_data, ifp->if_addrlen);
3971 * The name argument must be a pointer to storage which will last as
3972 * long as the interface does. For physical devices, the result of
3973 * device_get_name(dev) is a good choice and for pseudo-devices a
3974 * static string works well.
3977 if_initname(struct ifnet *ifp, const char *name, int unit)
3979 ifp->if_dname = name;
3980 ifp->if_dunit = unit;
3981 if (unit != IF_DUNIT_NONE)
3982 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit);
3984 strlcpy(ifp->if_xname, name, IFNAMSIZ);
3988 if_printf(struct ifnet *ifp, const char *fmt, ...)
3993 snprintf(if_fmt, sizeof(if_fmt), "%s: %s", ifp->if_xname, fmt);
3995 vlog(LOG_INFO, if_fmt, ap);
4001 if_start(struct ifnet *ifp)
4004 (*(ifp)->if_start)(ifp);
4008 * Backwards compatibility interface for drivers
4009 * that have not implemented it
4012 if_transmit(struct ifnet *ifp, struct mbuf *m)
4016 IFQ_HANDOFF(ifp, m, error);
4021 if_input_default(struct ifnet *ifp __unused, struct mbuf *m)
4028 if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust)
4033 if (_IF_QFULL(ifq)) {
4035 if_inc_counter(ifp, IFCOUNTER_OQDROPS, 1);
4040 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len + adjust);
4041 if (m->m_flags & (M_BCAST|M_MCAST))
4042 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1);
4043 active = ifp->if_drv_flags & IFF_DRV_OACTIVE;
4045 _IF_ENQUEUE(ifq, m);
4047 if (ifp != NULL && !active)
4048 (*(ifp)->if_start)(ifp);
4053 if_register_com_alloc(u_char type,
4054 if_com_alloc_t *a, if_com_free_t *f)
4057 KASSERT(if_com_alloc[type] == NULL,
4058 ("if_register_com_alloc: %d already registered", type));
4059 KASSERT(if_com_free[type] == NULL,
4060 ("if_register_com_alloc: %d free already registered", type));
4062 if_com_alloc[type] = a;
4063 if_com_free[type] = f;
4067 if_deregister_com_alloc(u_char type)
4070 KASSERT(if_com_alloc[type] != NULL,
4071 ("if_deregister_com_alloc: %d not registered", type));
4072 KASSERT(if_com_free[type] != NULL,
4073 ("if_deregister_com_alloc: %d free not registered", type));
4074 if_com_alloc[type] = NULL;
4075 if_com_free[type] = NULL;
4078 /* API for driver access to network stack owned ifnet.*/
4080 if_setbaudrate(struct ifnet *ifp, uint64_t baudrate)
4084 oldbrate = ifp->if_baudrate;
4085 ifp->if_baudrate = baudrate;
4090 if_getbaudrate(if_t ifp)
4093 return (((struct ifnet *)ifp)->if_baudrate);
4097 if_setcapabilities(if_t ifp, int capabilities)
4099 ((struct ifnet *)ifp)->if_capabilities = capabilities;
4104 if_setcapabilitiesbit(if_t ifp, int setbit, int clearbit)
4106 ((struct ifnet *)ifp)->if_capabilities |= setbit;
4107 ((struct ifnet *)ifp)->if_capabilities &= ~clearbit;
4113 if_getcapabilities(if_t ifp)
4115 return ((struct ifnet *)ifp)->if_capabilities;
4119 if_setcapenable(if_t ifp, int capabilities)
4121 ((struct ifnet *)ifp)->if_capenable = capabilities;
4126 if_setcapenablebit(if_t ifp, int setcap, int clearcap)
4129 ((struct ifnet *)ifp)->if_capenable |= setcap;
4131 ((struct ifnet *)ifp)->if_capenable &= ~clearcap;
4137 if_getdname(if_t ifp)
4139 return ((struct ifnet *)ifp)->if_dname;
4143 if_togglecapenable(if_t ifp, int togglecap)
4145 ((struct ifnet *)ifp)->if_capenable ^= togglecap;
4150 if_getcapenable(if_t ifp)
4152 return ((struct ifnet *)ifp)->if_capenable;
4156 * This is largely undesirable because it ties ifnet to a device, but does
4157 * provide flexiblity for an embedded product vendor. Should be used with
4158 * the understanding that it violates the interface boundaries, and should be
4159 * a last resort only.
4162 if_setdev(if_t ifp, void *dev)
4168 if_setdrvflagbits(if_t ifp, int set_flags, int clear_flags)
4170 ((struct ifnet *)ifp)->if_drv_flags |= set_flags;
4171 ((struct ifnet *)ifp)->if_drv_flags &= ~clear_flags;
4177 if_getdrvflags(if_t ifp)
4179 return ((struct ifnet *)ifp)->if_drv_flags;
4183 if_setdrvflags(if_t ifp, int flags)
4185 ((struct ifnet *)ifp)->if_drv_flags = flags;
4191 if_setflags(if_t ifp, int flags)
4193 ((struct ifnet *)ifp)->if_flags = flags;
4198 if_setflagbits(if_t ifp, int set, int clear)
4200 ((struct ifnet *)ifp)->if_flags |= set;
4201 ((struct ifnet *)ifp)->if_flags &= ~clear;
4207 if_getflags(if_t ifp)
4209 return ((struct ifnet *)ifp)->if_flags;
4213 if_clearhwassist(if_t ifp)
4215 ((struct ifnet *)ifp)->if_hwassist = 0;
4220 if_sethwassistbits(if_t ifp, int toset, int toclear)
4222 ((struct ifnet *)ifp)->if_hwassist |= toset;
4223 ((struct ifnet *)ifp)->if_hwassist &= ~toclear;
4229 if_sethwassist(if_t ifp, int hwassist_bit)
4231 ((struct ifnet *)ifp)->if_hwassist = hwassist_bit;
4236 if_gethwassist(if_t ifp)
4238 return ((struct ifnet *)ifp)->if_hwassist;
4242 if_setmtu(if_t ifp, int mtu)
4244 ((struct ifnet *)ifp)->if_mtu = mtu;
4251 return ((struct ifnet *)ifp)->if_mtu;
4255 if_getmtu_family(if_t ifp, int family)
4259 for (dp = domains; dp; dp = dp->dom_next) {
4260 if (dp->dom_family == family && dp->dom_ifmtu != NULL)
4261 return (dp->dom_ifmtu((struct ifnet *)ifp));
4264 return (((struct ifnet *)ifp)->if_mtu);
4268 if_setsoftc(if_t ifp, void *softc)
4270 ((struct ifnet *)ifp)->if_softc = softc;
4275 if_getsoftc(if_t ifp)
4277 return ((struct ifnet *)ifp)->if_softc;
4281 if_setrcvif(struct mbuf *m, if_t ifp)
4283 m->m_pkthdr.rcvif = (struct ifnet *)ifp;
4287 if_setvtag(struct mbuf *m, uint16_t tag)
4289 m->m_pkthdr.ether_vtag = tag;
4293 if_getvtag(struct mbuf *m)
4296 return (m->m_pkthdr.ether_vtag);
4300 if_sendq_empty(if_t ifp)
4302 return IFQ_DRV_IS_EMPTY(&((struct ifnet *)ifp)->if_snd);
4306 if_getifaddr(if_t ifp)
4308 return ((struct ifnet *)ifp)->if_addr;
4312 if_getamcount(if_t ifp)
4314 return ((struct ifnet *)ifp)->if_amcount;
4319 if_setsendqready(if_t ifp)
4321 IFQ_SET_READY(&((struct ifnet *)ifp)->if_snd);
4326 if_setsendqlen(if_t ifp, int tx_desc_count)
4328 IFQ_SET_MAXLEN(&((struct ifnet *)ifp)->if_snd, tx_desc_count);
4329 ((struct ifnet *)ifp)->if_snd.ifq_drv_maxlen = tx_desc_count;
4335 if_vlantrunkinuse(if_t ifp)
4337 return ((struct ifnet *)ifp)->if_vlantrunk != NULL?1:0;
4341 if_input(if_t ifp, struct mbuf* sendmp)
4343 (*((struct ifnet *)ifp)->if_input)((struct ifnet *)ifp, sendmp);
4349 #ifndef ETH_ADDR_LEN
4350 #define ETH_ADDR_LEN 6
4354 if_setupmultiaddr(if_t ifp, void *mta, int *cnt, int max)
4356 struct ifmultiaddr *ifma;
4357 uint8_t *lmta = (uint8_t *)mta;
4360 CK_STAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) {
4361 if (ifma->ifma_addr->sa_family != AF_LINK)
4367 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
4368 &lmta[mcnt * ETH_ADDR_LEN], ETH_ADDR_LEN);
4377 if_multiaddr_array(if_t ifp, void *mta, int *cnt, int max)
4381 if_maddr_rlock(ifp);
4382 error = if_setupmultiaddr(ifp, mta, cnt, max);
4383 if_maddr_runlock(ifp);
4388 if_multiaddr_count(if_t ifp, int max)
4390 struct ifmultiaddr *ifma;
4394 if_maddr_rlock(ifp);
4395 CK_STAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) {
4396 if (ifma->ifma_addr->sa_family != AF_LINK)
4402 if_maddr_runlock(ifp);
4407 if_multi_apply(struct ifnet *ifp, int (*filter)(void *, struct ifmultiaddr *, int), void *arg)
4409 struct ifmultiaddr *ifma;
4412 if_maddr_rlock(ifp);
4413 CK_STAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
4414 cnt += filter(arg, ifma, cnt);
4415 if_maddr_runlock(ifp);
4420 if_dequeue(if_t ifp)
4423 IFQ_DRV_DEQUEUE(&((struct ifnet *)ifp)->if_snd, m);
4429 if_sendq_prepend(if_t ifp, struct mbuf *m)
4431 IFQ_DRV_PREPEND(&((struct ifnet *)ifp)->if_snd, m);
4436 if_setifheaderlen(if_t ifp, int len)
4438 ((struct ifnet *)ifp)->if_hdrlen = len;
4443 if_getlladdr(if_t ifp)
4445 return (IF_LLADDR((struct ifnet *)ifp));
4449 if_gethandle(u_char type)
4451 return (if_alloc(type));
4455 if_bpfmtap(if_t ifh, struct mbuf *m)
4457 struct ifnet *ifp = (struct ifnet *)ifh;
4463 if_etherbpfmtap(if_t ifh, struct mbuf *m)
4465 struct ifnet *ifp = (struct ifnet *)ifh;
4467 ETHER_BPF_MTAP(ifp, m);
4471 if_vlancap(if_t ifh)
4473 struct ifnet *ifp = (struct ifnet *)ifh;
4474 VLAN_CAPABILITIES(ifp);
4478 if_sethwtsomax(if_t ifp, u_int if_hw_tsomax)
4481 ((struct ifnet *)ifp)->if_hw_tsomax = if_hw_tsomax;
4486 if_sethwtsomaxsegcount(if_t ifp, u_int if_hw_tsomaxsegcount)
4489 ((struct ifnet *)ifp)->if_hw_tsomaxsegcount = if_hw_tsomaxsegcount;
4494 if_sethwtsomaxsegsize(if_t ifp, u_int if_hw_tsomaxsegsize)
4497 ((struct ifnet *)ifp)->if_hw_tsomaxsegsize = if_hw_tsomaxsegsize;
4502 if_gethwtsomax(if_t ifp)
4505 return (((struct ifnet *)ifp)->if_hw_tsomax);
4509 if_gethwtsomaxsegcount(if_t ifp)
4512 return (((struct ifnet *)ifp)->if_hw_tsomaxsegcount);
4516 if_gethwtsomaxsegsize(if_t ifp)
4519 return (((struct ifnet *)ifp)->if_hw_tsomaxsegsize);
4523 if_setinitfn(if_t ifp, void (*init_fn)(void *))
4525 ((struct ifnet *)ifp)->if_init = init_fn;
4529 if_setioctlfn(if_t ifp, int (*ioctl_fn)(if_t, u_long, caddr_t))
4531 ((struct ifnet *)ifp)->if_ioctl = (void *)ioctl_fn;
4535 if_setstartfn(if_t ifp, void (*start_fn)(if_t))
4537 ((struct ifnet *)ifp)->if_start = (void *)start_fn;
4541 if_settransmitfn(if_t ifp, if_transmit_fn_t start_fn)
4543 ((struct ifnet *)ifp)->if_transmit = start_fn;
4546 void if_setqflushfn(if_t ifp, if_qflush_fn_t flush_fn)
4548 ((struct ifnet *)ifp)->if_qflush = flush_fn;
4553 if_setgetcounterfn(if_t ifp, if_get_counter_t fn)
4556 ifp->if_get_counter = fn;
4559 /* Revisit these - These are inline functions originally. */
4561 drbr_inuse_drv(if_t ifh, struct buf_ring *br)
4563 return drbr_inuse(ifh, br);
4567 drbr_dequeue_drv(if_t ifh, struct buf_ring *br)
4569 return drbr_dequeue(ifh, br);
4573 drbr_needs_enqueue_drv(if_t ifh, struct buf_ring *br)
4575 return drbr_needs_enqueue(ifh, br);
4579 drbr_enqueue_drv(if_t ifh, struct buf_ring *br, struct mbuf *m)
4581 return drbr_enqueue(ifh, br, m);