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>
40 #include <sys/eventhandler.h>
41 #include <sys/malloc.h>
42 #include <sys/domainset.h>
45 #include <sys/epoch.h>
47 #include <sys/systm.h>
50 #include <sys/socket.h>
51 #include <sys/socketvar.h>
52 #include <sys/protosw.h>
53 #include <sys/kernel.h>
55 #include <sys/refcount.h>
56 #include <sys/module.h>
57 #include <sys/rwlock.h>
58 #include <sys/sockio.h>
59 #include <sys/syslog.h>
60 #include <sys/sysctl.h>
61 #include <sys/sysent.h>
62 #include <sys/taskqueue.h>
63 #include <sys/domain.h>
67 #include <machine/stdarg.h>
71 #include <net/ethernet.h>
73 #include <net/if_arp.h>
74 #include <net/if_clone.h>
75 #include <net/if_dl.h>
76 #include <net/if_types.h>
77 #include <net/if_var.h>
78 #include <net/if_media.h>
79 #include <net/if_vlan_var.h>
80 #include <net/radix.h>
81 #include <net/route.h>
84 #if defined(INET) || defined(INET6)
85 #include <net/ethernet.h>
86 #include <netinet/in.h>
87 #include <netinet/in_var.h>
88 #include <netinet/ip.h>
89 #include <netinet/ip_carp.h>
91 #include <net/debugnet.h>
92 #include <netinet/if_ether.h>
95 #include <netinet6/in6_var.h>
96 #include <netinet6/in6_ifattach.h>
98 #endif /* INET || INET6 */
100 #include <security/mac/mac_framework.h>
103 * Consumers of struct ifreq such as tcpdump assume no pad between ifr_name
104 * and ifr_ifru when it is used in SIOCGIFCONF.
106 _Static_assert(sizeof(((struct ifreq *)0)->ifr_name) ==
107 offsetof(struct ifreq, ifr_ifru), "gap between ifr_name and ifr_ifru");
109 __read_mostly epoch_t net_epoch_preempt;
110 __read_mostly epoch_t net_epoch;
111 #ifdef COMPAT_FREEBSD32
112 #include <sys/mount.h>
113 #include <compat/freebsd32/freebsd32.h>
115 struct ifreq_buffer32 {
116 uint32_t length; /* (size_t) */
117 uint32_t buffer; /* (void *) */
121 * Interface request structure used for socket
122 * ioctl's. All interface ioctl's must have parameter
123 * definitions which begin with ifr_name. The
124 * remainder may be interface specific.
127 char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */
129 struct sockaddr ifru_addr;
130 struct sockaddr ifru_dstaddr;
131 struct sockaddr ifru_broadaddr;
132 struct ifreq_buffer32 ifru_buffer;
143 u_char ifru_vlan_pcp;
146 CTASSERT(sizeof(struct ifreq) == sizeof(struct ifreq32));
147 CTASSERT(__offsetof(struct ifreq, ifr_ifru) ==
148 __offsetof(struct ifreq32, ifr_ifru));
150 struct ifgroupreq32 {
151 char ifgr_name[IFNAMSIZ];
154 char ifgru_group[IFNAMSIZ];
155 uint32_t ifgru_groups;
159 struct ifmediareq32 {
160 char ifm_name[IFNAMSIZ];
166 uint32_t ifm_ulist; /* (int *) */
168 #define SIOCGIFMEDIA32 _IOC_NEWTYPE(SIOCGIFMEDIA, struct ifmediareq32)
169 #define SIOCGIFXMEDIA32 _IOC_NEWTYPE(SIOCGIFXMEDIA, struct ifmediareq32)
171 #define _CASE_IOC_IFGROUPREQ_32(cmd) \
172 _IOC_NEWTYPE((cmd), struct ifgroupreq32): case
173 #else /* !COMPAT_FREEBSD32 */
174 #define _CASE_IOC_IFGROUPREQ_32(cmd)
175 #endif /* !COMPAT_FREEBSD32 */
177 #define CASE_IOC_IFGROUPREQ(cmd) \
178 _CASE_IOC_IFGROUPREQ_32(cmd) \
183 #ifdef COMPAT_FREEBSD32
184 struct ifreq32 ifr32;
188 union ifgroupreq_union {
189 struct ifgroupreq ifgr;
190 #ifdef COMPAT_FREEBSD32
191 struct ifgroupreq32 ifgr32;
195 SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers");
196 SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management");
198 SYSCTL_INT(_net_link, OID_AUTO, ifqmaxlen, CTLFLAG_RDTUN,
199 &ifqmaxlen, 0, "max send queue size");
201 /* Log link state change events */
202 static int log_link_state_change = 1;
204 SYSCTL_INT(_net_link, OID_AUTO, log_link_state_change, CTLFLAG_RW,
205 &log_link_state_change, 0,
206 "log interface link state change events");
208 /* Log promiscuous mode change events */
209 static int log_promisc_mode_change = 1;
211 SYSCTL_INT(_net_link, OID_AUTO, log_promisc_mode_change, CTLFLAG_RDTUN,
212 &log_promisc_mode_change, 1,
213 "log promiscuous mode change events");
215 /* Interface description */
216 static unsigned int ifdescr_maxlen = 1024;
217 SYSCTL_UINT(_net, OID_AUTO, ifdescr_maxlen, CTLFLAG_RW,
219 "administrative maximum length for interface description");
221 static MALLOC_DEFINE(M_IFDESCR, "ifdescr", "ifnet descriptions");
223 /* global sx for non-critical path ifdescr */
224 static struct sx ifdescr_sx;
225 SX_SYSINIT(ifdescr_sx, &ifdescr_sx, "ifnet descr");
227 void (*ng_ether_link_state_p)(struct ifnet *ifp, int state);
228 void (*lagg_linkstate_p)(struct ifnet *ifp, int state);
229 /* These are external hooks for CARP. */
230 void (*carp_linkstate_p)(struct ifnet *ifp);
231 void (*carp_demote_adj_p)(int, char *);
232 int (*carp_master_p)(struct ifaddr *);
233 #if defined(INET) || defined(INET6)
234 int (*carp_forus_p)(struct ifnet *ifp, u_char *dhost);
235 int (*carp_output_p)(struct ifnet *ifp, struct mbuf *m,
236 const struct sockaddr *sa);
237 int (*carp_ioctl_p)(struct ifreq *, u_long, struct thread *);
238 int (*carp_attach_p)(struct ifaddr *, int);
239 void (*carp_detach_p)(struct ifaddr *, bool);
242 int (*carp_iamatch_p)(struct ifaddr *, uint8_t **);
245 struct ifaddr *(*carp_iamatch6_p)(struct ifnet *ifp, struct in6_addr *taddr6);
246 caddr_t (*carp_macmatch6_p)(struct ifnet *ifp, struct mbuf *m,
247 const struct in6_addr *taddr);
250 struct mbuf *(*tbr_dequeue_ptr)(struct ifaltq *, int) = NULL;
253 * XXX: Style; these should be sorted alphabetically, and unprototyped
254 * static functions should be prototyped. Currently they are sorted by
257 static void if_attachdomain(void *);
258 static void if_attachdomain1(struct ifnet *);
259 static int ifconf(u_long, caddr_t);
260 static void *if_grow(void);
261 static void if_input_default(struct ifnet *, struct mbuf *);
262 static int if_requestencap_default(struct ifnet *, struct if_encap_req *);
263 static void if_route(struct ifnet *, int flag, int fam);
264 static int if_setflag(struct ifnet *, int, int, int *, int);
265 static int if_transmit(struct ifnet *ifp, struct mbuf *m);
266 static void if_unroute(struct ifnet *, int flag, int fam);
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 **);
274 static void if_siocaddmulti(void *, int);
276 static void if_vmove(struct ifnet *, struct vnet *);
281 * XXX: declare here to avoid to include many inet6 related files..
282 * should be more generalized?
284 extern void nd6_setmtu(struct ifnet *);
287 /* ipsec helper hooks */
288 VNET_DEFINE(struct hhook_head *, ipsec_hhh_in[HHOOK_IPSEC_COUNT]);
289 VNET_DEFINE(struct hhook_head *, ipsec_hhh_out[HHOOK_IPSEC_COUNT]);
291 VNET_DEFINE(int, if_index);
292 int ifqmaxlen = IFQ_MAXLEN;
293 VNET_DEFINE(struct ifnethead, ifnet); /* depend on static init XXX */
294 VNET_DEFINE(struct ifgrouphead, ifg_head);
296 VNET_DEFINE_STATIC(int, if_indexlim) = 8;
298 /* Table of ifnet by index. */
299 VNET_DEFINE(struct ifnet **, ifindex_table);
301 #define V_if_indexlim VNET(if_indexlim)
302 #define V_ifindex_table VNET(ifindex_table)
305 * The global network interface list (V_ifnet) and related state (such as
306 * if_index, if_indexlim, and ifindex_table) are protected by an sxlock and
307 * an rwlock. Either may be acquired shared to stablize the list, but both
308 * must be acquired writable to modify the list. This model allows us to
309 * both stablize the interface list during interrupt thread processing, but
310 * also to stablize it over long-running ioctls, without introducing priority
311 * inversions and deadlocks.
313 struct rwlock ifnet_rwlock;
314 RW_SYSINIT_FLAGS(ifnet_rw, &ifnet_rwlock, "ifnet_rw", RW_RECURSE);
315 struct sx ifnet_sxlock;
316 SX_SYSINIT_FLAGS(ifnet_sx, &ifnet_sxlock, "ifnet_sx", SX_RECURSE);
319 * The allocation of network interfaces is a rather non-atomic affair; we
320 * need to select an index before we are ready to expose the interface for
321 * use, so will use this pointer value to indicate reservation.
323 #define IFNET_HOLD (void *)(uintptr_t)(-1)
325 static if_com_alloc_t *if_com_alloc[256];
326 static if_com_free_t *if_com_free[256];
328 static MALLOC_DEFINE(M_IFNET, "ifnet", "interface internals");
329 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address");
330 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address");
333 ifnet_byindex(u_short idx)
337 if (__predict_false(idx > V_if_index))
340 ifp = *(struct ifnet * const volatile *)(V_ifindex_table + idx);
341 return (__predict_false(ifp == IFNET_HOLD) ? NULL : ifp);
345 ifnet_byindex_ref(u_short idx)
351 ifp = ifnet_byindex(idx);
352 if (ifp == NULL || (ifp->if_flags & IFF_DYING))
359 * Allocate an ifindex array entry; return 0 on success or an error on
363 ifindex_alloc(void **old)
367 IFNET_WLOCK_ASSERT();
369 * Try to find an empty slot below V_if_index. If we fail, take the
372 for (idx = 1; idx <= V_if_index; idx++) {
373 if (V_ifindex_table[idx] == NULL)
377 /* Catch if_index overflow. */
378 if (idx >= V_if_indexlim) {
382 if (idx > V_if_index)
388 ifindex_free_locked(u_short idx)
391 IFNET_WLOCK_ASSERT();
393 V_ifindex_table[idx] = NULL;
394 while (V_if_index > 0 &&
395 V_ifindex_table[V_if_index] == NULL)
400 ifindex_free(u_short idx)
404 ifindex_free_locked(idx);
409 ifnet_setbyindex(u_short idx, struct ifnet *ifp)
412 V_ifindex_table[idx] = ifp;
416 ifaddr_byindex(u_short idx)
419 struct ifaddr *ifa = NULL;
423 ifp = ifnet_byindex(idx);
424 if (ifp != NULL && (ifa = ifp->if_addr) != NULL)
430 * Network interface utility routines.
432 * Routines with ifa_ifwith* names take sockaddr *'s as
437 vnet_if_init(const void *unused __unused)
441 CK_STAILQ_INIT(&V_ifnet);
442 CK_STAILQ_INIT(&V_ifg_head);
444 old = if_grow(); /* create initial table */
446 epoch_wait_preempt(net_epoch_preempt);
448 vnet_if_clone_init();
450 VNET_SYSINIT(vnet_if_init, SI_SUB_INIT_IF, SI_ORDER_SECOND, vnet_if_init,
455 vnet_if_uninit(const void *unused __unused)
458 VNET_ASSERT(CK_STAILQ_EMPTY(&V_ifnet), ("%s:%d tailq &V_ifnet=%p "
459 "not empty", __func__, __LINE__, &V_ifnet));
460 VNET_ASSERT(CK_STAILQ_EMPTY(&V_ifg_head), ("%s:%d tailq &V_ifg_head=%p "
461 "not empty", __func__, __LINE__, &V_ifg_head));
463 free((caddr_t)V_ifindex_table, M_IFNET);
465 VNET_SYSUNINIT(vnet_if_uninit, SI_SUB_INIT_IF, SI_ORDER_FIRST,
466 vnet_if_uninit, NULL);
469 vnet_if_return(const void *unused __unused)
471 struct ifnet *ifp, *nifp;
473 /* Return all inherited interfaces to their parent vnets. */
474 CK_STAILQ_FOREACH_SAFE(ifp, &V_ifnet, if_link, nifp) {
475 if (ifp->if_home_vnet != ifp->if_vnet)
476 if_vmove(ifp, ifp->if_home_vnet);
479 VNET_SYSUNINIT(vnet_if_return, SI_SUB_VNET_DONE, SI_ORDER_ANY,
480 vnet_if_return, NULL);
493 IFNET_WLOCK_ASSERT();
494 oldlim = V_if_indexlim;
496 n = (oldlim << 1) * sizeof(*e);
497 e = malloc(n, M_IFNET, M_WAITOK | M_ZERO);
499 if (V_if_indexlim != oldlim) {
503 if (V_ifindex_table != NULL) {
504 memcpy((caddr_t)e, (caddr_t)V_ifindex_table, n/2);
505 old = V_ifindex_table;
513 * Allocate a struct ifnet and an index for an interface. A layer 2
514 * common structure will also be allocated if an allocation routine is
515 * registered for the passed type.
518 if_alloc_domain(u_char type, int numa_domain)
524 KASSERT(numa_domain <= IF_NODOM, ("numa_domain too large"));
525 if (numa_domain == IF_NODOM)
526 ifp = malloc(sizeof(struct ifnet), M_IFNET,
529 ifp = malloc_domainset(sizeof(struct ifnet), M_IFNET,
530 DOMAINSET_PREF(numa_domain), M_WAITOK | M_ZERO);
533 idx = ifindex_alloc(&old);
534 if (__predict_false(idx == USHRT_MAX)) {
536 epoch_wait_preempt(net_epoch_preempt);
540 ifnet_setbyindex(idx, IFNET_HOLD);
544 ifp->if_alloctype = type;
545 ifp->if_numa_domain = numa_domain;
547 ifp->if_vnet = curvnet;
549 if (if_com_alloc[type] != NULL) {
550 ifp->if_l2com = if_com_alloc[type](type, ifp);
551 if (ifp->if_l2com == NULL) {
558 IF_ADDR_LOCK_INIT(ifp);
559 TASK_INIT(&ifp->if_linktask, 0, do_link_state_change, ifp);
560 TASK_INIT(&ifp->if_addmultitask, 0, if_siocaddmulti, ifp);
561 ifp->if_afdata_initialized = 0;
562 IF_AFDATA_LOCK_INIT(ifp);
563 CK_STAILQ_INIT(&ifp->if_addrhead);
564 CK_STAILQ_INIT(&ifp->if_multiaddrs);
565 CK_STAILQ_INIT(&ifp->if_groups);
569 ifq_init(&ifp->if_snd, ifp);
571 refcount_init(&ifp->if_refcount, 1); /* Index reference. */
572 for (int i = 0; i < IFCOUNTERS; i++)
573 ifp->if_counters[i] = counter_u64_alloc(M_WAITOK);
574 ifp->if_get_counter = if_get_counter_default;
575 ifp->if_pcp = IFNET_PCP_NONE;
576 ifnet_setbyindex(ifp->if_index, ifp);
581 if_alloc_dev(u_char type, device_t dev)
585 if (dev == NULL || bus_get_domain(dev, &numa_domain) != 0)
586 return (if_alloc_domain(type, IF_NODOM));
587 return (if_alloc_domain(type, numa_domain));
591 if_alloc(u_char type)
594 return (if_alloc_domain(type, IF_NODOM));
597 * Do the actual work of freeing a struct ifnet, and layer 2 common
598 * structure. This call is made when the last reference to an
599 * interface is released.
602 if_free_internal(struct ifnet *ifp)
605 KASSERT((ifp->if_flags & IFF_DYING),
606 ("if_free_internal: interface not dying"));
608 if (if_com_free[ifp->if_alloctype] != NULL)
609 if_com_free[ifp->if_alloctype](ifp->if_l2com,
613 mac_ifnet_destroy(ifp);
615 IF_AFDATA_DESTROY(ifp);
616 IF_ADDR_LOCK_DESTROY(ifp);
617 ifq_delete(&ifp->if_snd);
619 for (int i = 0; i < IFCOUNTERS; i++)
620 counter_u64_free(ifp->if_counters[i]);
622 free(ifp->if_description, M_IFDESCR);
623 free(ifp->if_hw_addr, M_IFADDR);
624 if (ifp->if_numa_domain == IF_NODOM)
627 free_domain(ifp, M_IFNET);
631 if_destroy(epoch_context_t ctx)
635 ifp = __containerof(ctx, struct ifnet, if_epoch_ctx);
636 if_free_internal(ifp);
640 * Deregister an interface and free the associated storage.
643 if_free(struct ifnet *ifp)
646 ifp->if_flags |= IFF_DYING; /* XXX: Locking */
648 CURVNET_SET_QUIET(ifp->if_vnet);
650 KASSERT(ifp == ifnet_byindex(ifp->if_index),
651 ("%s: freeing unallocated ifnet", ifp->if_xname));
653 ifindex_free_locked(ifp->if_index);
656 if (refcount_release(&ifp->if_refcount))
657 epoch_call(net_epoch_preempt, &ifp->if_epoch_ctx, if_destroy);
662 * Interfaces to keep an ifnet type-stable despite the possibility of the
663 * driver calling if_free(). If there are additional references, we defer
664 * freeing the underlying data structure.
667 if_ref(struct ifnet *ifp)
670 /* We don't assert the ifnet list lock here, but arguably should. */
671 refcount_acquire(&ifp->if_refcount);
675 if_rele(struct ifnet *ifp)
678 if (!refcount_release(&ifp->if_refcount))
680 epoch_call(net_epoch_preempt, &ifp->if_epoch_ctx, if_destroy);
684 ifq_init(struct ifaltq *ifq, struct ifnet *ifp)
687 mtx_init(&ifq->ifq_mtx, ifp->if_xname, "if send queue", MTX_DEF);
689 if (ifq->ifq_maxlen == 0)
690 ifq->ifq_maxlen = ifqmaxlen;
693 ifq->altq_disc = NULL;
694 ifq->altq_flags &= ALTQF_CANTCHANGE;
695 ifq->altq_tbr = NULL;
700 ifq_delete(struct ifaltq *ifq)
702 mtx_destroy(&ifq->ifq_mtx);
706 * Perform generic interface initialization tasks and attach the interface
707 * to the list of "active" interfaces. If vmove flag is set on entry
708 * to if_attach_internal(), perform only a limited subset of initialization
709 * tasks, given that we are moving from one vnet to another an ifnet which
710 * has already been fully initialized.
712 * Note that if_detach_internal() removes group membership unconditionally
713 * even when vmove flag is set, and if_attach_internal() adds only IFG_ALL.
714 * Thus, when if_vmove() is applied to a cloned interface, group membership
715 * is lost while a cloned one always joins a group whose name is
716 * ifc->ifc_name. To recover this after if_detach_internal() and
717 * if_attach_internal(), the cloner should be specified to
718 * if_attach_internal() via ifc. If it is non-NULL, if_attach_internal()
719 * attempts to join a group whose name is ifc->ifc_name.
722 * - The decision to return void and thus require this function to
723 * succeed is questionable.
724 * - We should probably do more sanity checking. For instance we don't
725 * do anything to insure if_xname is unique or non-empty.
728 if_attach(struct ifnet *ifp)
731 if_attach_internal(ifp, 0, NULL);
735 * Compute the least common TSO limit.
738 if_hw_tsomax_common(if_t ifp, struct ifnet_hw_tsomax *pmax)
741 * 1) If there is no limit currently, take the limit from
742 * the network adapter.
744 * 2) If the network adapter has a limit below the current
747 if (pmax->tsomaxbytes == 0 || (ifp->if_hw_tsomax != 0 &&
748 ifp->if_hw_tsomax < pmax->tsomaxbytes)) {
749 pmax->tsomaxbytes = ifp->if_hw_tsomax;
751 if (pmax->tsomaxsegcount == 0 || (ifp->if_hw_tsomaxsegcount != 0 &&
752 ifp->if_hw_tsomaxsegcount < pmax->tsomaxsegcount)) {
753 pmax->tsomaxsegcount = ifp->if_hw_tsomaxsegcount;
755 if (pmax->tsomaxsegsize == 0 || (ifp->if_hw_tsomaxsegsize != 0 &&
756 ifp->if_hw_tsomaxsegsize < pmax->tsomaxsegsize)) {
757 pmax->tsomaxsegsize = ifp->if_hw_tsomaxsegsize;
762 * Update TSO limit of a network adapter.
764 * Returns zero if no change. Else non-zero.
767 if_hw_tsomax_update(if_t ifp, struct ifnet_hw_tsomax *pmax)
770 if (ifp->if_hw_tsomax != pmax->tsomaxbytes) {
771 ifp->if_hw_tsomax = pmax->tsomaxbytes;
774 if (ifp->if_hw_tsomaxsegsize != pmax->tsomaxsegsize) {
775 ifp->if_hw_tsomaxsegsize = pmax->tsomaxsegsize;
778 if (ifp->if_hw_tsomaxsegcount != pmax->tsomaxsegcount) {
779 ifp->if_hw_tsomaxsegcount = pmax->tsomaxsegcount;
786 if_attach_internal(struct ifnet *ifp, int vmove, struct if_clone *ifc)
788 unsigned socksize, ifasize;
789 int namelen, masklen;
790 struct sockaddr_dl *sdl;
793 if (ifp->if_index == 0 || ifp != ifnet_byindex(ifp->if_index))
794 panic ("%s: BUG: if_attach called without if_alloc'd input()\n",
798 ifp->if_vnet = curvnet;
799 if (ifp->if_home_vnet == NULL)
800 ifp->if_home_vnet = curvnet;
803 if_addgroup(ifp, IFG_ALL);
805 /* Restore group membership for cloned interfaces. */
806 if (vmove && ifc != NULL)
807 if_clone_addgroup(ifp, ifc);
809 getmicrotime(&ifp->if_lastchange);
810 ifp->if_epoch = time_uptime;
812 KASSERT((ifp->if_transmit == NULL && ifp->if_qflush == NULL) ||
813 (ifp->if_transmit != NULL && ifp->if_qflush != NULL),
814 ("transmit and qflush must both either be set or both be NULL"));
815 if (ifp->if_transmit == NULL) {
816 ifp->if_transmit = if_transmit;
817 ifp->if_qflush = if_qflush;
819 if (ifp->if_input == NULL)
820 ifp->if_input = if_input_default;
822 if (ifp->if_requestencap == NULL)
823 ifp->if_requestencap = if_requestencap_default;
827 mac_ifnet_create(ifp);
831 * Create a Link Level name for this device.
833 namelen = strlen(ifp->if_xname);
835 * Always save enough space for any possiable name so we
836 * can do a rename in place later.
838 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + IFNAMSIZ;
839 socksize = masklen + ifp->if_addrlen;
840 if (socksize < sizeof(*sdl))
841 socksize = sizeof(*sdl);
842 socksize = roundup2(socksize, sizeof(long));
843 ifasize = sizeof(*ifa) + 2 * socksize;
844 ifa = ifa_alloc(ifasize, M_WAITOK);
845 sdl = (struct sockaddr_dl *)(ifa + 1);
846 sdl->sdl_len = socksize;
847 sdl->sdl_family = AF_LINK;
848 bcopy(ifp->if_xname, sdl->sdl_data, namelen);
849 sdl->sdl_nlen = namelen;
850 sdl->sdl_index = ifp->if_index;
851 sdl->sdl_type = ifp->if_type;
854 ifa->ifa_addr = (struct sockaddr *)sdl;
855 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
856 ifa->ifa_netmask = (struct sockaddr *)sdl;
857 sdl->sdl_len = masklen;
859 sdl->sdl_data[--namelen] = 0xff;
860 CK_STAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link);
861 /* Reliably crash if used uninitialized. */
862 ifp->if_broadcastaddr = NULL;
864 if (ifp->if_type == IFT_ETHER) {
865 ifp->if_hw_addr = malloc(ifp->if_addrlen, M_IFADDR,
869 #if defined(INET) || defined(INET6)
870 /* Use defaults for TSO, if nothing is set */
871 if (ifp->if_hw_tsomax == 0 &&
872 ifp->if_hw_tsomaxsegcount == 0 &&
873 ifp->if_hw_tsomaxsegsize == 0) {
875 * The TSO defaults needs to be such that an
876 * NFS mbuf list of 35 mbufs totalling just
877 * below 64K works and that a chain of mbufs
878 * can be defragged into at most 32 segments:
880 ifp->if_hw_tsomax = min(IP_MAXPACKET, (32 * MCLBYTES) -
881 (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN));
882 ifp->if_hw_tsomaxsegcount = 35;
883 ifp->if_hw_tsomaxsegsize = 2048; /* 2K */
885 /* XXX some drivers set IFCAP_TSO after ethernet attach */
886 if (ifp->if_capabilities & IFCAP_TSO) {
887 if_printf(ifp, "Using defaults for TSO: %u/%u/%u\n",
889 ifp->if_hw_tsomaxsegcount,
890 ifp->if_hw_tsomaxsegsize);
898 * Update the interface index in the link layer address
901 for (ifa = ifp->if_addr; ifa != NULL;
902 ifa = CK_STAILQ_NEXT(ifa, ifa_link)) {
903 if (ifa->ifa_addr->sa_family == AF_LINK) {
904 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
905 sdl->sdl_index = ifp->if_index;
912 CK_STAILQ_INSERT_TAIL(&V_ifnet, ifp, if_link);
914 curvnet->vnet_ifcnt++;
918 if (domain_init_status >= 2)
919 if_attachdomain1(ifp);
921 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
922 if (IS_DEFAULT_VNET(curvnet))
923 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL);
925 /* Announce the interface. */
926 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
930 if_epochalloc(void *dummy __unused)
933 net_epoch_preempt = epoch_alloc("Net preemptible", EPOCH_PREEMPT);
934 net_epoch = epoch_alloc("Net", 0);
936 SYSINIT(ifepochalloc, SI_SUB_TASKQ + 1, SI_ORDER_ANY,
937 if_epochalloc, NULL);
940 if_attachdomain(void *dummy)
944 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link)
945 if_attachdomain1(ifp);
947 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_SECOND,
948 if_attachdomain, NULL);
951 if_attachdomain1(struct ifnet *ifp)
956 * Since dp->dom_ifattach calls malloc() with M_WAITOK, we
957 * cannot lock ifp->if_afdata initialization, entirely.
960 if (ifp->if_afdata_initialized >= domain_init_status) {
961 IF_AFDATA_UNLOCK(ifp);
962 log(LOG_WARNING, "%s called more than once on %s\n",
963 __func__, ifp->if_xname);
966 ifp->if_afdata_initialized = domain_init_status;
967 IF_AFDATA_UNLOCK(ifp);
969 /* address family dependent data region */
970 bzero(ifp->if_afdata, sizeof(ifp->if_afdata));
971 for (dp = domains; dp; dp = dp->dom_next) {
972 if (dp->dom_ifattach)
973 ifp->if_afdata[dp->dom_family] =
974 (*dp->dom_ifattach)(ifp);
979 * Remove any unicast or broadcast network addresses from an interface.
982 if_purgeaddrs(struct ifnet *ifp)
987 struct epoch_tracker et;
990 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
991 if (ifa->ifa_addr->sa_family != AF_LINK)
999 /* XXX: Ugly!! ad hoc just for INET */
1000 if (ifa->ifa_addr->sa_family == AF_INET) {
1001 struct ifaliasreq ifr;
1003 bzero(&ifr, sizeof(ifr));
1004 ifr.ifra_addr = *ifa->ifa_addr;
1005 if (ifa->ifa_dstaddr)
1006 ifr.ifra_broadaddr = *ifa->ifa_dstaddr;
1007 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp,
1013 if (ifa->ifa_addr->sa_family == AF_INET6) {
1015 /* ifp_addrhead is already updated */
1020 CK_STAILQ_REMOVE(&ifp->if_addrhead, ifa, ifaddr, ifa_link);
1021 IF_ADDR_WUNLOCK(ifp);
1027 * Remove any multicast network addresses from an interface when an ifnet
1031 if_purgemaddrs(struct ifnet *ifp)
1033 struct ifmultiaddr *ifma;
1036 while (!CK_STAILQ_EMPTY(&ifp->if_multiaddrs)) {
1037 ifma = CK_STAILQ_FIRST(&ifp->if_multiaddrs);
1038 CK_STAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifmultiaddr, ifma_link);
1039 if_delmulti_locked(ifp, ifma, 1);
1041 IF_ADDR_WUNLOCK(ifp);
1045 * Detach an interface, removing it from the list of "active" interfaces.
1046 * If vmove flag is set on entry to if_detach_internal(), perform only a
1047 * limited subset of cleanup tasks, given that we are moving an ifnet from
1048 * one vnet to another, where it must be fully operational.
1050 * XXXRW: There are some significant questions about event ordering, and
1051 * how to prevent things from starting to use the interface during detach.
1054 if_detach(struct ifnet *ifp)
1057 CURVNET_SET_QUIET(ifp->if_vnet);
1058 if_detach_internal(ifp, 0, NULL);
1063 * The vmove flag, if set, indicates that we are called from a callpath
1064 * that is moving an interface to a different vnet instance.
1066 * The shutdown flag, if set, indicates that we are called in the
1067 * process of shutting down a vnet instance. Currently only the
1068 * vnet_if_return SYSUNINIT function sets it. Note: we can be called
1069 * on a vnet instance shutdown without this flag being set, e.g., when
1070 * the cloned interfaces are destoyed as first thing of teardown.
1073 if_detach_internal(struct ifnet *ifp, int vmove, struct if_clone **ifcp)
1083 shutdown = ifp->if_vnet->vnet_shutdown;
1086 CK_STAILQ_FOREACH(iter, &V_ifnet, if_link)
1088 CK_STAILQ_REMOVE(&V_ifnet, ifp, ifnet, if_link);
1090 ifp->if_flags |= IFF_DYING;
1097 * While we would want to panic here, we cannot
1098 * guarantee that the interface is indeed still on
1099 * the list given we don't hold locks all the way.
1104 panic("%s: ifp=%p not on the ifnet tailq %p",
1105 __func__, ifp, &V_ifnet);
1107 return; /* XXX this should panic as well? */
1112 * At this point we know the interface still was on the ifnet list
1113 * and we removed it so we are in a stable state.
1116 curvnet->vnet_ifcnt--;
1118 epoch_wait_preempt(net_epoch_preempt);
1121 * Ensure all pending EPOCH(9) callbacks have been executed. This
1122 * fixes issues about late destruction of multicast options
1123 * which lead to leave group calls, which in turn access the
1124 * belonging ifnet structure:
1126 epoch_drain_callbacks(net_epoch_preempt);
1129 * In any case (destroy or vmove) detach us from the groups
1130 * and remove/wait for pending events on the taskq.
1131 * XXX-BZ in theory an interface could still enqueue a taskq change?
1135 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
1136 taskqueue_drain(taskqueue_swi, &ifp->if_addmultitask);
1139 * Check if this is a cloned interface or not. Must do even if
1140 * shutting down as a if_vmove_reclaim() would move the ifp and
1141 * the if_clone_addgroup() will have a corrupted string overwise
1142 * from a gibberish pointer.
1144 if (vmove && ifcp != NULL)
1145 *ifcp = if_clone_findifc(ifp);
1151 * On VNET shutdown abort here as the stack teardown will do all
1152 * the work top-down for us.
1155 /* Give interface users the chance to clean up. */
1156 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
1159 * In case of a vmove we are done here without error.
1160 * If we would signal an error it would lead to the same
1161 * abort as if we did not find the ifnet anymore.
1162 * if_detach() calls us in void context and does not care
1163 * about an early abort notification, so life is splendid :)
1165 goto finish_vnet_shutdown;
1170 * At this point we are not tearing down a VNET and are either
1171 * going to destroy or vmove the interface and have to cleanup
1176 * Remove routes and flush queues.
1179 if (ALTQ_IS_ENABLED(&ifp->if_snd))
1180 altq_disable(&ifp->if_snd);
1181 if (ALTQ_IS_ATTACHED(&ifp->if_snd))
1182 altq_detach(&ifp->if_snd);
1193 * Remove all IPv6 kernel structs related to ifp. This should be done
1194 * before removing routing entries below, since IPv6 interface direct
1195 * routes are expected to be removed by the IPv6-specific kernel API.
1196 * Otherwise, the kernel will detect some inconsistency and bark it.
1200 if_purgemaddrs(ifp);
1202 /* Announce that the interface is gone. */
1203 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
1204 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
1205 if (IS_DEFAULT_VNET(curvnet))
1206 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL);
1210 * Prevent further calls into the device driver via ifnet.
1215 * Clean up all addresses.
1218 if (!CK_STAILQ_EMPTY(&ifp->if_addrhead)) {
1219 ifa = CK_STAILQ_FIRST(&ifp->if_addrhead);
1220 CK_STAILQ_REMOVE(&ifp->if_addrhead, ifa, ifaddr, ifa_link);
1221 IF_ADDR_WUNLOCK(ifp);
1224 IF_ADDR_WUNLOCK(ifp);
1227 rt_flushifroutes(ifp);
1230 finish_vnet_shutdown:
1233 * We cannot hold the lock over dom_ifdetach calls as they might
1234 * sleep, for example trying to drain a callout, thus open up the
1235 * theoretical race with re-attaching.
1237 IF_AFDATA_LOCK(ifp);
1238 i = ifp->if_afdata_initialized;
1239 ifp->if_afdata_initialized = 0;
1240 IF_AFDATA_UNLOCK(ifp);
1241 for (dp = domains; i > 0 && dp; dp = dp->dom_next) {
1242 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) {
1243 (*dp->dom_ifdetach)(ifp,
1244 ifp->if_afdata[dp->dom_family]);
1245 ifp->if_afdata[dp->dom_family] = NULL;
1254 * if_vmove() performs a limited version of if_detach() in current
1255 * vnet and if_attach()es the ifnet to the vnet specified as 2nd arg.
1256 * An attempt is made to shrink if_index in current vnet, find an
1257 * unused if_index in target vnet and calls if_grow() if necessary,
1258 * and finally find an unused if_xname for the target vnet.
1261 if_vmove(struct ifnet *ifp, struct vnet *new_vnet)
1263 struct if_clone *ifc;
1264 u_int bif_dlt, bif_hdrlen;
1269 * if_detach_internal() will call the eventhandler to notify
1270 * interface departure. That will detach if_bpf. We need to
1271 * safe the dlt and hdrlen so we can re-attach it later.
1273 bpf_get_bp_params(ifp->if_bpf, &bif_dlt, &bif_hdrlen);
1276 * Detach from current vnet, but preserve LLADDR info, do not
1277 * mark as dead etc. so that the ifnet can be reattached later.
1278 * If we cannot find it, we lost the race to someone else.
1280 rc = if_detach_internal(ifp, 1, &ifc);
1285 * Unlink the ifnet from ifindex_table[] in current vnet, and shrink
1286 * the if_index for that vnet if possible.
1288 * NOTE: IFNET_WLOCK/IFNET_WUNLOCK() are assumed to be unvirtualized,
1289 * or we'd lock on one vnet and unlock on another.
1292 ifindex_free_locked(ifp->if_index);
1296 * Perform interface-specific reassignment tasks, if provided by
1299 if (ifp->if_reassign != NULL)
1300 ifp->if_reassign(ifp, new_vnet, NULL);
1303 * Switch to the context of the target vnet.
1305 CURVNET_SET_QUIET(new_vnet);
1308 ifp->if_index = ifindex_alloc(&old);
1309 if (__predict_false(ifp->if_index == USHRT_MAX)) {
1311 epoch_wait_preempt(net_epoch_preempt);
1315 ifnet_setbyindex(ifp->if_index, ifp);
1318 if_attach_internal(ifp, 1, ifc);
1320 if (ifp->if_bpf == NULL)
1321 bpfattach(ifp, bif_dlt, bif_hdrlen);
1327 * Move an ifnet to or from another child prison/vnet, specified by the jail id.
1330 if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid)
1335 /* Try to find the prison within our visibility. */
1336 sx_slock(&allprison_lock);
1337 pr = prison_find_child(td->td_ucred->cr_prison, jid);
1338 sx_sunlock(&allprison_lock);
1341 prison_hold_locked(pr);
1342 mtx_unlock(&pr->pr_mtx);
1344 /* Do not try to move the iface from and to the same prison. */
1345 if (pr->pr_vnet == ifp->if_vnet) {
1350 /* Make sure the named iface does not exists in the dst. prison/vnet. */
1351 /* XXX Lock interfaces to avoid races. */
1352 CURVNET_SET_QUIET(pr->pr_vnet);
1353 difp = ifunit(ifname);
1360 /* Make sure the VNET is stable. */
1361 if (ifp->if_vnet->vnet_shutdown) {
1368 /* Move the interface into the child jail/vnet. */
1369 if_vmove(ifp, pr->pr_vnet);
1371 /* Report the new if_xname back to the userland. */
1372 sprintf(ifname, "%s", ifp->if_xname);
1379 if_vmove_reclaim(struct thread *td, char *ifname, int jid)
1382 struct vnet *vnet_dst;
1385 /* Try to find the prison within our visibility. */
1386 sx_slock(&allprison_lock);
1387 pr = prison_find_child(td->td_ucred->cr_prison, jid);
1388 sx_sunlock(&allprison_lock);
1391 prison_hold_locked(pr);
1392 mtx_unlock(&pr->pr_mtx);
1394 /* Make sure the named iface exists in the source prison/vnet. */
1395 CURVNET_SET(pr->pr_vnet);
1396 ifp = ifunit(ifname); /* XXX Lock to avoid races. */
1403 /* Do not try to move the iface from and to the same prison. */
1404 vnet_dst = TD_TO_VNET(td);
1405 if (vnet_dst == ifp->if_vnet) {
1411 /* Make sure the VNET is stable. */
1412 if (ifp->if_vnet->vnet_shutdown) {
1418 /* Get interface back from child jail/vnet. */
1419 if_vmove(ifp, vnet_dst);
1422 /* Report the new if_xname back to the userland. */
1423 sprintf(ifname, "%s", ifp->if_xname);
1431 * Add a group to an interface
1434 if_addgroup(struct ifnet *ifp, const char *groupname)
1436 struct ifg_list *ifgl;
1437 struct ifg_group *ifg = NULL;
1438 struct ifg_member *ifgm;
1441 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' &&
1442 groupname[strlen(groupname) - 1] <= '9')
1446 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1447 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) {
1452 if ((ifgl = (struct ifg_list *)malloc(sizeof(struct ifg_list), M_TEMP,
1453 M_NOWAIT)) == NULL) {
1458 if ((ifgm = (struct ifg_member *)malloc(sizeof(struct ifg_member),
1459 M_TEMP, M_NOWAIT)) == NULL) {
1465 CK_STAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
1466 if (!strcmp(ifg->ifg_group, groupname))
1470 if ((ifg = (struct ifg_group *)malloc(sizeof(struct ifg_group),
1471 M_TEMP, M_NOWAIT)) == NULL) {
1477 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group));
1478 ifg->ifg_refcnt = 0;
1479 CK_STAILQ_INIT(&ifg->ifg_members);
1480 CK_STAILQ_INSERT_TAIL(&V_ifg_head, ifg, ifg_next);
1485 ifgl->ifgl_group = ifg;
1486 ifgm->ifgm_ifp = ifp;
1489 CK_STAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next);
1490 CK_STAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next);
1491 IF_ADDR_WUNLOCK(ifp);
1496 EVENTHANDLER_INVOKE(group_attach_event, ifg);
1497 EVENTHANDLER_INVOKE(group_change_event, groupname);
1503 * Remove a group from an interface
1506 if_delgroup(struct ifnet *ifp, const char *groupname)
1508 struct ifg_list *ifgl;
1509 struct ifg_member *ifgm;
1513 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1514 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname))
1523 CK_STAILQ_REMOVE(&ifp->if_groups, ifgl, ifg_list, ifgl_next);
1524 IF_ADDR_WUNLOCK(ifp);
1526 CK_STAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next)
1527 if (ifgm->ifgm_ifp == ifp)
1531 CK_STAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifg_member, ifgm_next);
1533 if (--ifgl->ifgl_group->ifg_refcnt == 0) {
1534 CK_STAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_group, ifg_next);
1539 epoch_wait_preempt(net_epoch_preempt);
1541 EVENTHANDLER_INVOKE(group_detach_event, ifgl->ifgl_group);
1542 free(ifgl->ifgl_group, M_TEMP);
1547 EVENTHANDLER_INVOKE(group_change_event, groupname);
1553 * Remove an interface from all groups
1556 if_delgroups(struct ifnet *ifp)
1558 struct ifg_list *ifgl;
1559 struct ifg_member *ifgm;
1560 char groupname[IFNAMSIZ];
1564 while (!CK_STAILQ_EMPTY(&ifp->if_groups)) {
1565 ifgl = CK_STAILQ_FIRST(&ifp->if_groups);
1567 strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ);
1570 CK_STAILQ_REMOVE(&ifp->if_groups, ifgl, ifg_list, ifgl_next);
1571 IF_ADDR_WUNLOCK(ifp);
1573 CK_STAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next)
1574 if (ifgm->ifgm_ifp == ifp)
1578 CK_STAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifg_member,
1581 if (--ifgl->ifgl_group->ifg_refcnt == 0) {
1582 CK_STAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_group, ifg_next);
1587 epoch_wait_preempt(net_epoch_preempt);
1590 EVENTHANDLER_INVOKE(group_detach_event,
1592 free(ifgl->ifgl_group, M_TEMP);
1594 EVENTHANDLER_INVOKE(group_change_event, groupname);
1602 ifgr_group_get(void *ifgrp)
1604 union ifgroupreq_union *ifgrup;
1607 #ifdef COMPAT_FREEBSD32
1608 if (SV_CURPROC_FLAG(SV_ILP32))
1609 return (&ifgrup->ifgr32.ifgr_ifgru.ifgru_group[0]);
1611 return (&ifgrup->ifgr.ifgr_ifgru.ifgru_group[0]);
1614 static struct ifg_req *
1615 ifgr_groups_get(void *ifgrp)
1617 union ifgroupreq_union *ifgrup;
1620 #ifdef COMPAT_FREEBSD32
1621 if (SV_CURPROC_FLAG(SV_ILP32))
1622 return ((struct ifg_req *)(uintptr_t)
1623 ifgrup->ifgr32.ifgr_ifgru.ifgru_groups);
1625 return (ifgrup->ifgr.ifgr_ifgru.ifgru_groups);
1629 * Stores all groups from an interface in memory pointed to by ifgr.
1632 if_getgroup(struct ifgroupreq *ifgr, struct ifnet *ifp)
1635 struct ifg_list *ifgl;
1636 struct ifg_req ifgrq, *ifgp;
1640 if (ifgr->ifgr_len == 0) {
1641 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1642 ifgr->ifgr_len += sizeof(struct ifg_req);
1646 len = ifgr->ifgr_len;
1647 ifgp = ifgr_groups_get(ifgr);
1649 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) {
1650 if (len < sizeof(ifgrq))
1652 bzero(&ifgrq, sizeof ifgrq);
1653 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group,
1654 sizeof(ifgrq.ifgrq_group));
1655 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req))))
1657 len -= sizeof(ifgrq);
1665 * Stores all members of a group in memory pointed to by igfr
1668 if_getgroupmembers(struct ifgroupreq *ifgr)
1670 struct ifg_group *ifg;
1671 struct ifg_member *ifgm;
1672 struct ifg_req ifgrq, *ifgp;
1676 CK_STAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
1677 if (!strcmp(ifg->ifg_group, ifgr->ifgr_name))
1684 if (ifgr->ifgr_len == 0) {
1685 CK_STAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next)
1686 ifgr->ifgr_len += sizeof(ifgrq);
1691 len = ifgr->ifgr_len;
1692 ifgp = ifgr_groups_get(ifgr);
1693 CK_STAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) {
1694 if (len < sizeof(ifgrq)) {
1698 bzero(&ifgrq, sizeof ifgrq);
1699 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname,
1700 sizeof(ifgrq.ifgrq_member));
1701 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) {
1705 len -= sizeof(ifgrq);
1714 * Return counter values from counter(9)s stored in ifnet.
1717 if_get_counter_default(struct ifnet *ifp, ift_counter cnt)
1720 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1722 return (counter_u64_fetch(ifp->if_counters[cnt]));
1726 * Increase an ifnet counter. Usually used for counters shared
1727 * between the stack and a driver, but function supports them all.
1730 if_inc_counter(struct ifnet *ifp, ift_counter cnt, int64_t inc)
1733 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1735 counter_u64_add(ifp->if_counters[cnt], inc);
1739 * Copy data from ifnet to userland API structure if_data.
1742 if_data_copy(struct ifnet *ifp, struct if_data *ifd)
1745 ifd->ifi_type = ifp->if_type;
1746 ifd->ifi_physical = 0;
1747 ifd->ifi_addrlen = ifp->if_addrlen;
1748 ifd->ifi_hdrlen = ifp->if_hdrlen;
1749 ifd->ifi_link_state = ifp->if_link_state;
1751 ifd->ifi_datalen = sizeof(struct if_data);
1752 ifd->ifi_mtu = ifp->if_mtu;
1753 ifd->ifi_metric = ifp->if_metric;
1754 ifd->ifi_baudrate = ifp->if_baudrate;
1755 ifd->ifi_hwassist = ifp->if_hwassist;
1756 ifd->ifi_epoch = ifp->if_epoch;
1757 ifd->ifi_lastchange = ifp->if_lastchange;
1759 ifd->ifi_ipackets = ifp->if_get_counter(ifp, IFCOUNTER_IPACKETS);
1760 ifd->ifi_ierrors = ifp->if_get_counter(ifp, IFCOUNTER_IERRORS);
1761 ifd->ifi_opackets = ifp->if_get_counter(ifp, IFCOUNTER_OPACKETS);
1762 ifd->ifi_oerrors = ifp->if_get_counter(ifp, IFCOUNTER_OERRORS);
1763 ifd->ifi_collisions = ifp->if_get_counter(ifp, IFCOUNTER_COLLISIONS);
1764 ifd->ifi_ibytes = ifp->if_get_counter(ifp, IFCOUNTER_IBYTES);
1765 ifd->ifi_obytes = ifp->if_get_counter(ifp, IFCOUNTER_OBYTES);
1766 ifd->ifi_imcasts = ifp->if_get_counter(ifp, IFCOUNTER_IMCASTS);
1767 ifd->ifi_omcasts = ifp->if_get_counter(ifp, IFCOUNTER_OMCASTS);
1768 ifd->ifi_iqdrops = ifp->if_get_counter(ifp, IFCOUNTER_IQDROPS);
1769 ifd->ifi_oqdrops = ifp->if_get_counter(ifp, IFCOUNTER_OQDROPS);
1770 ifd->ifi_noproto = ifp->if_get_counter(ifp, IFCOUNTER_NOPROTO);
1774 * Initialization, destruction and refcounting functions for ifaddrs.
1777 ifa_alloc(size_t size, int flags)
1781 KASSERT(size >= sizeof(struct ifaddr),
1782 ("%s: invalid size %zu", __func__, size));
1784 ifa = malloc(size, M_IFADDR, M_ZERO | flags);
1788 if ((ifa->ifa_opackets = counter_u64_alloc(flags)) == NULL)
1790 if ((ifa->ifa_ipackets = counter_u64_alloc(flags)) == NULL)
1792 if ((ifa->ifa_obytes = counter_u64_alloc(flags)) == NULL)
1794 if ((ifa->ifa_ibytes = counter_u64_alloc(flags)) == NULL)
1797 refcount_init(&ifa->ifa_refcnt, 1);
1802 /* free(NULL) is okay */
1803 counter_u64_free(ifa->ifa_opackets);
1804 counter_u64_free(ifa->ifa_ipackets);
1805 counter_u64_free(ifa->ifa_obytes);
1806 counter_u64_free(ifa->ifa_ibytes);
1807 free(ifa, M_IFADDR);
1813 ifa_ref(struct ifaddr *ifa)
1816 refcount_acquire(&ifa->ifa_refcnt);
1820 ifa_destroy(epoch_context_t ctx)
1824 ifa = __containerof(ctx, struct ifaddr, ifa_epoch_ctx);
1825 counter_u64_free(ifa->ifa_opackets);
1826 counter_u64_free(ifa->ifa_ipackets);
1827 counter_u64_free(ifa->ifa_obytes);
1828 counter_u64_free(ifa->ifa_ibytes);
1829 free(ifa, M_IFADDR);
1833 ifa_free(struct ifaddr *ifa)
1836 if (refcount_release(&ifa->ifa_refcnt))
1837 epoch_call(net_epoch_preempt, &ifa->ifa_epoch_ctx, ifa_destroy);
1842 ifa_maintain_loopback_route(int cmd, const char *otype, struct ifaddr *ifa,
1843 struct sockaddr *ia)
1845 struct epoch_tracker et;
1847 struct rt_addrinfo info;
1848 struct sockaddr_dl null_sdl;
1853 bzero(&info, sizeof(info));
1854 if (cmd != RTM_DELETE)
1855 info.rti_ifp = V_loif;
1856 if (cmd == RTM_ADD) {
1857 /* explicitly specify (loopback) ifa */
1858 if (info.rti_ifp != NULL) {
1859 NET_EPOCH_ENTER(et);
1860 info.rti_ifa = ifaof_ifpforaddr(ifa->ifa_addr, info.rti_ifp);
1861 if (info.rti_ifa != NULL)
1862 ifa_ref(info.rti_ifa);
1866 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC | RTF_PINNED;
1867 info.rti_info[RTAX_DST] = ia;
1868 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl;
1869 link_init_sdl(ifp, (struct sockaddr *)&null_sdl, ifp->if_type);
1871 error = rtrequest1_fib(cmd, &info, NULL, ifp->if_fib);
1874 !(cmd == RTM_ADD && error == EEXIST) &&
1875 !(cmd == RTM_DELETE && error == ENOENT))
1876 if_printf(ifp, "%s failed: %d\n", otype, error);
1882 ifa_add_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1885 return (ifa_maintain_loopback_route(RTM_ADD, "insertion", ifa, ia));
1889 ifa_del_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1892 return (ifa_maintain_loopback_route(RTM_DELETE, "deletion", ifa, ia));
1896 ifa_switch_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1899 return (ifa_maintain_loopback_route(RTM_CHANGE, "switch", ifa, ia));
1903 * XXX: Because sockaddr_dl has deeper structure than the sockaddr
1904 * structs used to represent other address families, it is necessary
1905 * to perform a different comparison.
1908 #define sa_dl_equal(a1, a2) \
1909 ((((const struct sockaddr_dl *)(a1))->sdl_len == \
1910 ((const struct sockaddr_dl *)(a2))->sdl_len) && \
1911 (bcmp(CLLADDR((const struct sockaddr_dl *)(a1)), \
1912 CLLADDR((const struct sockaddr_dl *)(a2)), \
1913 ((const struct sockaddr_dl *)(a1))->sdl_alen) == 0))
1916 * Locate an interface based on a complete address.
1920 ifa_ifwithaddr(const struct sockaddr *addr)
1927 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1928 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1929 if (ifa->ifa_addr->sa_family != addr->sa_family)
1931 if (sa_equal(addr, ifa->ifa_addr)) {
1934 /* IP6 doesn't have broadcast */
1935 if ((ifp->if_flags & IFF_BROADCAST) &&
1936 ifa->ifa_broadaddr &&
1937 ifa->ifa_broadaddr->sa_len != 0 &&
1938 sa_equal(ifa->ifa_broadaddr, addr)) {
1949 ifa_ifwithaddr_check(const struct sockaddr *addr)
1951 struct epoch_tracker et;
1954 NET_EPOCH_ENTER(et);
1955 rc = (ifa_ifwithaddr(addr) != NULL);
1961 * Locate an interface based on the broadcast address.
1965 ifa_ifwithbroadaddr(const struct sockaddr *addr, int fibnum)
1970 MPASS(in_epoch(net_epoch_preempt));
1971 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1972 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1974 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1975 if (ifa->ifa_addr->sa_family != addr->sa_family)
1977 if ((ifp->if_flags & IFF_BROADCAST) &&
1978 ifa->ifa_broadaddr &&
1979 ifa->ifa_broadaddr->sa_len != 0 &&
1980 sa_equal(ifa->ifa_broadaddr, addr)) {
1991 * Locate the point to point interface with a given destination address.
1995 ifa_ifwithdstaddr(const struct sockaddr *addr, int fibnum)
2000 MPASS(in_epoch(net_epoch_preempt));
2001 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2002 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
2004 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
2006 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2007 if (ifa->ifa_addr->sa_family != addr->sa_family)
2009 if (ifa->ifa_dstaddr != NULL &&
2010 sa_equal(addr, ifa->ifa_dstaddr)) {
2021 * Find an interface on a specific network. If many, choice
2022 * is most specific found.
2025 ifa_ifwithnet(const struct sockaddr *addr, int ignore_ptp, int fibnum)
2029 struct ifaddr *ifa_maybe = NULL;
2030 u_int af = addr->sa_family;
2031 const char *addr_data = addr->sa_data, *cplim;
2033 MPASS(in_epoch(net_epoch_preempt));
2035 * AF_LINK addresses can be looked up directly by their index number,
2036 * so do that if we can.
2038 if (af == AF_LINK) {
2039 const struct sockaddr_dl *sdl = (const struct sockaddr_dl *)addr;
2040 if (sdl->sdl_index && sdl->sdl_index <= V_if_index)
2041 return (ifaddr_byindex(sdl->sdl_index));
2045 * Scan though each interface, looking for ones that have addresses
2046 * in this address family and the requested fib.
2048 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2049 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
2051 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2052 const char *cp, *cp2, *cp3;
2054 if (ifa->ifa_addr->sa_family != af)
2056 if (af == AF_INET &&
2057 ifp->if_flags & IFF_POINTOPOINT && !ignore_ptp) {
2059 * This is a bit broken as it doesn't
2060 * take into account that the remote end may
2061 * be a single node in the network we are
2063 * The trouble is that we don't know the
2064 * netmask for the remote end.
2066 if (ifa->ifa_dstaddr != NULL &&
2067 sa_equal(addr, ifa->ifa_dstaddr)) {
2072 * Scan all the bits in the ifa's address.
2073 * If a bit dissagrees with what we are
2074 * looking for, mask it with the netmask
2075 * to see if it really matters.
2076 * (A byte at a time)
2078 if (ifa->ifa_netmask == 0)
2081 cp2 = ifa->ifa_addr->sa_data;
2082 cp3 = ifa->ifa_netmask->sa_data;
2083 cplim = ifa->ifa_netmask->sa_len
2084 + (char *)ifa->ifa_netmask;
2086 if ((*cp++ ^ *cp2++) & *cp3++)
2087 goto next; /* next address! */
2089 * If the netmask of what we just found
2090 * is more specific than what we had before
2091 * (if we had one), or if the virtual status
2092 * of new prefix is better than of the old one,
2093 * then remember the new one before continuing
2094 * to search for an even better one.
2096 if (ifa_maybe == NULL ||
2097 ifa_preferred(ifa_maybe, ifa) ||
2098 rn_refines((caddr_t)ifa->ifa_netmask,
2099 (caddr_t)ifa_maybe->ifa_netmask)) {
2112 * Find an interface address specific to an interface best matching
2116 ifaof_ifpforaddr(const struct sockaddr *addr, struct ifnet *ifp)
2119 const char *cp, *cp2, *cp3;
2121 struct ifaddr *ifa_maybe = NULL;
2122 u_int af = addr->sa_family;
2127 MPASS(in_epoch(net_epoch_preempt));
2128 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2129 if (ifa->ifa_addr->sa_family != af)
2131 if (ifa_maybe == NULL)
2133 if (ifa->ifa_netmask == 0) {
2134 if (sa_equal(addr, ifa->ifa_addr) ||
2135 (ifa->ifa_dstaddr &&
2136 sa_equal(addr, ifa->ifa_dstaddr)))
2140 if (ifp->if_flags & IFF_POINTOPOINT) {
2141 if (sa_equal(addr, ifa->ifa_dstaddr))
2145 cp2 = ifa->ifa_addr->sa_data;
2146 cp3 = ifa->ifa_netmask->sa_data;
2147 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
2148 for (; cp3 < cplim; cp3++)
2149 if ((*cp++ ^ *cp2++) & *cp3)
2161 * See whether new ifa is better than current one:
2162 * 1) A non-virtual one is preferred over virtual.
2163 * 2) A virtual in master state preferred over any other state.
2165 * Used in several address selecting functions.
2168 ifa_preferred(struct ifaddr *cur, struct ifaddr *next)
2171 return (cur->ifa_carp && (!next->ifa_carp ||
2172 ((*carp_master_p)(next) && !(*carp_master_p)(cur))));
2175 struct sockaddr_dl *
2176 link_alloc_sdl(size_t size, int flags)
2179 return (malloc(size, M_TEMP, flags));
2183 link_free_sdl(struct sockaddr *sa)
2189 * Fills in given sdl with interface basic info.
2190 * Returns pointer to filled sdl.
2192 struct sockaddr_dl *
2193 link_init_sdl(struct ifnet *ifp, struct sockaddr *paddr, u_char iftype)
2195 struct sockaddr_dl *sdl;
2197 sdl = (struct sockaddr_dl *)paddr;
2198 memset(sdl, 0, sizeof(struct sockaddr_dl));
2199 sdl->sdl_len = sizeof(struct sockaddr_dl);
2200 sdl->sdl_family = AF_LINK;
2201 sdl->sdl_index = ifp->if_index;
2202 sdl->sdl_type = iftype;
2208 * Mark an interface down and notify protocols of
2212 if_unroute(struct ifnet *ifp, int flag, int fam)
2216 KASSERT(flag == IFF_UP, ("if_unroute: flag != IFF_UP"));
2218 ifp->if_flags &= ~flag;
2219 getmicrotime(&ifp->if_lastchange);
2220 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
2221 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
2222 pfctlinput(PRC_IFDOWN, ifa->ifa_addr);
2223 ifp->if_qflush(ifp);
2226 (*carp_linkstate_p)(ifp);
2231 * Mark an interface up and notify protocols of
2235 if_route(struct ifnet *ifp, int flag, int fam)
2239 KASSERT(flag == IFF_UP, ("if_route: flag != IFF_UP"));
2241 ifp->if_flags |= flag;
2242 getmicrotime(&ifp->if_lastchange);
2243 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
2244 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
2245 pfctlinput(PRC_IFUP, ifa->ifa_addr);
2247 (*carp_linkstate_p)(ifp);
2254 void (*vlan_link_state_p)(struct ifnet *); /* XXX: private from if_vlan */
2255 void (*vlan_trunk_cap_p)(struct ifnet *); /* XXX: private from if_vlan */
2256 struct ifnet *(*vlan_trunkdev_p)(struct ifnet *);
2257 struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t);
2258 int (*vlan_tag_p)(struct ifnet *, uint16_t *);
2259 int (*vlan_pcp_p)(struct ifnet *, uint16_t *);
2260 int (*vlan_setcookie_p)(struct ifnet *, void *);
2261 void *(*vlan_cookie_p)(struct ifnet *);
2264 * Handle a change in the interface link state. To avoid LORs
2265 * between driver lock and upper layer locks, as well as possible
2266 * recursions, we post event to taskqueue, and all job
2267 * is done in static do_link_state_change().
2270 if_link_state_change(struct ifnet *ifp, int link_state)
2272 /* Return if state hasn't changed. */
2273 if (ifp->if_link_state == link_state)
2276 ifp->if_link_state = link_state;
2278 /* XXXGL: reference ifp? */
2279 taskqueue_enqueue(taskqueue_swi, &ifp->if_linktask);
2283 do_link_state_change(void *arg, int pending)
2289 link_state = ifp->if_link_state;
2291 CURVNET_SET(ifp->if_vnet);
2293 if (ifp->if_vlantrunk != NULL)
2294 (*vlan_link_state_p)(ifp);
2296 if ((ifp->if_type == IFT_ETHER || ifp->if_type == IFT_L2VLAN) &&
2297 ifp->if_l2com != NULL)
2298 (*ng_ether_link_state_p)(ifp, link_state);
2300 (*carp_linkstate_p)(ifp);
2302 ifp->if_bridge_linkstate(ifp);
2304 (*lagg_linkstate_p)(ifp, link_state);
2306 if (IS_DEFAULT_VNET(curvnet))
2307 devctl_notify("IFNET", ifp->if_xname,
2308 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN",
2311 if_printf(ifp, "%d link states coalesced\n", pending);
2312 if (log_link_state_change)
2313 if_printf(ifp, "link state changed to %s\n",
2314 (link_state == LINK_STATE_UP) ? "UP" : "DOWN" );
2315 EVENTHANDLER_INVOKE(ifnet_link_event, ifp, link_state);
2320 * Mark an interface down and notify protocols of
2324 if_down(struct ifnet *ifp)
2327 EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_DOWN);
2328 if_unroute(ifp, IFF_UP, AF_UNSPEC);
2332 * Mark an interface up and notify protocols of
2336 if_up(struct ifnet *ifp)
2339 if_route(ifp, IFF_UP, AF_UNSPEC);
2340 EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_UP);
2344 * Flush an interface queue.
2347 if_qflush(struct ifnet *ifp)
2355 if (ALTQ_IS_ENABLED(ifq))
2359 while ((m = n) != NULL) {
2370 * Map interface name to interface structure pointer, with or without
2371 * returning a reference.
2374 ifunit_ref(const char *name)
2376 struct epoch_tracker et;
2379 NET_EPOCH_ENTER(et);
2380 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2381 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0 &&
2382 !(ifp->if_flags & IFF_DYING))
2392 ifunit(const char *name)
2394 struct epoch_tracker et;
2397 NET_EPOCH_ENTER(et);
2398 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2399 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0)
2407 ifr_buffer_get_buffer(void *data)
2409 union ifreq_union *ifrup;
2412 #ifdef COMPAT_FREEBSD32
2413 if (SV_CURPROC_FLAG(SV_ILP32))
2414 return ((void *)(uintptr_t)
2415 ifrup->ifr32.ifr_ifru.ifru_buffer.buffer);
2417 return (ifrup->ifr.ifr_ifru.ifru_buffer.buffer);
2421 ifr_buffer_set_buffer_null(void *data)
2423 union ifreq_union *ifrup;
2426 #ifdef COMPAT_FREEBSD32
2427 if (SV_CURPROC_FLAG(SV_ILP32))
2428 ifrup->ifr32.ifr_ifru.ifru_buffer.buffer = 0;
2431 ifrup->ifr.ifr_ifru.ifru_buffer.buffer = NULL;
2435 ifr_buffer_get_length(void *data)
2437 union ifreq_union *ifrup;
2440 #ifdef COMPAT_FREEBSD32
2441 if (SV_CURPROC_FLAG(SV_ILP32))
2442 return (ifrup->ifr32.ifr_ifru.ifru_buffer.length);
2444 return (ifrup->ifr.ifr_ifru.ifru_buffer.length);
2448 ifr_buffer_set_length(void *data, size_t len)
2450 union ifreq_union *ifrup;
2453 #ifdef COMPAT_FREEBSD32
2454 if (SV_CURPROC_FLAG(SV_ILP32))
2455 ifrup->ifr32.ifr_ifru.ifru_buffer.length = len;
2458 ifrup->ifr.ifr_ifru.ifru_buffer.length = len;
2462 ifr_data_get_ptr(void *ifrp)
2464 union ifreq_union *ifrup;
2467 #ifdef COMPAT_FREEBSD32
2468 if (SV_CURPROC_FLAG(SV_ILP32))
2469 return ((void *)(uintptr_t)
2470 ifrup->ifr32.ifr_ifru.ifru_data);
2472 return (ifrup->ifr.ifr_ifru.ifru_data);
2476 * Hardware specific interface ioctls.
2479 ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td)
2482 int error = 0, do_ifup = 0;
2483 int new_flags, temp_flags;
2484 size_t namelen, onamelen;
2486 char *descrbuf, *odescrbuf;
2487 char new_name[IFNAMSIZ];
2489 struct sockaddr_dl *sdl;
2491 ifr = (struct ifreq *)data;
2494 ifr->ifr_index = ifp->if_index;
2498 temp_flags = ifp->if_flags | ifp->if_drv_flags;
2499 ifr->ifr_flags = temp_flags & 0xffff;
2500 ifr->ifr_flagshigh = temp_flags >> 16;
2504 ifr->ifr_reqcap = ifp->if_capabilities;
2505 ifr->ifr_curcap = ifp->if_capenable;
2510 error = mac_ifnet_ioctl_get(td->td_ucred, ifr, ifp);
2515 ifr->ifr_metric = ifp->if_metric;
2519 ifr->ifr_mtu = ifp->if_mtu;
2523 /* XXXGL: did this ever worked? */
2529 sx_slock(&ifdescr_sx);
2530 if (ifp->if_description == NULL)
2533 /* space for terminating nul */
2534 descrlen = strlen(ifp->if_description) + 1;
2535 if (ifr_buffer_get_length(ifr) < descrlen)
2536 ifr_buffer_set_buffer_null(ifr);
2538 error = copyout(ifp->if_description,
2539 ifr_buffer_get_buffer(ifr), descrlen);
2540 ifr_buffer_set_length(ifr, descrlen);
2542 sx_sunlock(&ifdescr_sx);
2546 error = priv_check(td, PRIV_NET_SETIFDESCR);
2551 * Copy only (length-1) bytes to make sure that
2552 * if_description is always nul terminated. The
2553 * length parameter is supposed to count the
2554 * terminating nul in.
2556 if (ifr_buffer_get_length(ifr) > ifdescr_maxlen)
2557 return (ENAMETOOLONG);
2558 else if (ifr_buffer_get_length(ifr) == 0)
2561 descrbuf = malloc(ifr_buffer_get_length(ifr),
2562 M_IFDESCR, M_WAITOK | M_ZERO);
2563 error = copyin(ifr_buffer_get_buffer(ifr), descrbuf,
2564 ifr_buffer_get_length(ifr) - 1);
2566 free(descrbuf, M_IFDESCR);
2571 sx_xlock(&ifdescr_sx);
2572 odescrbuf = ifp->if_description;
2573 ifp->if_description = descrbuf;
2574 sx_xunlock(&ifdescr_sx);
2576 getmicrotime(&ifp->if_lastchange);
2577 free(odescrbuf, M_IFDESCR);
2581 ifr->ifr_fib = ifp->if_fib;
2585 error = priv_check(td, PRIV_NET_SETIFFIB);
2588 if (ifr->ifr_fib >= rt_numfibs)
2591 ifp->if_fib = ifr->ifr_fib;
2595 error = priv_check(td, PRIV_NET_SETIFFLAGS);
2599 * Currently, no driver owned flags pass the IFF_CANTCHANGE
2600 * check, so we don't need special handling here yet.
2602 new_flags = (ifr->ifr_flags & 0xffff) |
2603 (ifr->ifr_flagshigh << 16);
2604 if (ifp->if_flags & IFF_UP &&
2605 (new_flags & IFF_UP) == 0) {
2607 } else if (new_flags & IFF_UP &&
2608 (ifp->if_flags & IFF_UP) == 0) {
2611 /* See if permanently promiscuous mode bit is about to flip */
2612 if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) {
2613 if (new_flags & IFF_PPROMISC)
2614 ifp->if_flags |= IFF_PROMISC;
2615 else if (ifp->if_pcount == 0)
2616 ifp->if_flags &= ~IFF_PROMISC;
2617 if (log_promisc_mode_change)
2618 if_printf(ifp, "permanently promiscuous mode %s\n",
2619 ((new_flags & IFF_PPROMISC) ?
2620 "enabled" : "disabled"));
2622 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
2623 (new_flags &~ IFF_CANTCHANGE);
2624 if (ifp->if_ioctl) {
2625 (void) (*ifp->if_ioctl)(ifp, cmd, data);
2629 getmicrotime(&ifp->if_lastchange);
2633 error = priv_check(td, PRIV_NET_SETIFCAP);
2636 if (ifp->if_ioctl == NULL)
2637 return (EOPNOTSUPP);
2638 if (ifr->ifr_reqcap & ~ifp->if_capabilities)
2640 error = (*ifp->if_ioctl)(ifp, cmd, data);
2642 getmicrotime(&ifp->if_lastchange);
2647 error = mac_ifnet_ioctl_set(td->td_ucred, ifr, ifp);
2652 error = priv_check(td, PRIV_NET_SETIFNAME);
2655 error = copyinstr(ifr_data_get_ptr(ifr), new_name, IFNAMSIZ,
2659 if (new_name[0] == '\0')
2661 if (new_name[IFNAMSIZ-1] != '\0') {
2662 new_name[IFNAMSIZ-1] = '\0';
2663 if (strlen(new_name) == IFNAMSIZ-1)
2666 if (strcmp(new_name, ifp->if_xname) == 0)
2668 if (ifunit(new_name) != NULL)
2672 * XXX: Locking. Nothing else seems to lock if_flags,
2673 * and there are numerous other races with the
2674 * ifunit() checks not being atomic with namespace
2675 * changes (renames, vmoves, if_attach, etc).
2677 ifp->if_flags |= IFF_RENAMING;
2679 /* Announce the departure of the interface. */
2680 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
2681 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
2683 if_printf(ifp, "changing name to '%s'\n", new_name);
2686 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname));
2688 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
2689 namelen = strlen(new_name);
2690 onamelen = sdl->sdl_nlen;
2692 * Move the address if needed. This is safe because we
2693 * allocate space for a name of length IFNAMSIZ when we
2694 * create this in if_attach().
2696 if (namelen != onamelen) {
2697 bcopy(sdl->sdl_data + onamelen,
2698 sdl->sdl_data + namelen, sdl->sdl_alen);
2700 bcopy(new_name, sdl->sdl_data, namelen);
2701 sdl->sdl_nlen = namelen;
2702 sdl = (struct sockaddr_dl *)ifa->ifa_netmask;
2703 bzero(sdl->sdl_data, onamelen);
2704 while (namelen != 0)
2705 sdl->sdl_data[--namelen] = 0xff;
2706 IF_ADDR_WUNLOCK(ifp);
2708 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
2709 /* Announce the return of the interface. */
2710 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
2712 ifp->if_flags &= ~IFF_RENAMING;
2717 error = priv_check(td, PRIV_NET_SETIFVNET);
2720 error = if_vmove_loan(td, ifp, ifr->ifr_name, ifr->ifr_jid);
2725 error = priv_check(td, PRIV_NET_SETIFMETRIC);
2728 ifp->if_metric = ifr->ifr_metric;
2729 getmicrotime(&ifp->if_lastchange);
2733 error = priv_check(td, PRIV_NET_SETIFPHYS);
2736 if (ifp->if_ioctl == NULL)
2737 return (EOPNOTSUPP);
2738 error = (*ifp->if_ioctl)(ifp, cmd, data);
2740 getmicrotime(&ifp->if_lastchange);
2745 u_long oldmtu = ifp->if_mtu;
2747 error = priv_check(td, PRIV_NET_SETIFMTU);
2750 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU)
2752 if (ifp->if_ioctl == NULL)
2753 return (EOPNOTSUPP);
2754 error = (*ifp->if_ioctl)(ifp, cmd, data);
2756 getmicrotime(&ifp->if_lastchange);
2759 DEBUGNET_NOTIFY_MTU(ifp);
2763 * If the link MTU changed, do network layer specific procedure.
2765 if (ifp->if_mtu != oldmtu) {
2776 if (cmd == SIOCADDMULTI)
2777 error = priv_check(td, PRIV_NET_ADDMULTI);
2779 error = priv_check(td, PRIV_NET_DELMULTI);
2783 /* Don't allow group membership on non-multicast interfaces. */
2784 if ((ifp->if_flags & IFF_MULTICAST) == 0)
2785 return (EOPNOTSUPP);
2787 /* Don't let users screw up protocols' entries. */
2788 if (ifr->ifr_addr.sa_family != AF_LINK)
2791 if (cmd == SIOCADDMULTI) {
2792 struct epoch_tracker et;
2793 struct ifmultiaddr *ifma;
2796 * Userland is only permitted to join groups once
2797 * via the if_addmulti() KPI, because it cannot hold
2798 * struct ifmultiaddr * between calls. It may also
2799 * lose a race while we check if the membership
2802 NET_EPOCH_ENTER(et);
2803 ifma = if_findmulti(ifp, &ifr->ifr_addr);
2808 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma);
2810 error = if_delmulti(ifp, &ifr->ifr_addr);
2813 getmicrotime(&ifp->if_lastchange);
2816 case SIOCSIFPHYADDR:
2817 case SIOCDIFPHYADDR:
2819 case SIOCSIFPHYADDR_IN6:
2822 case SIOCSIFGENERIC:
2823 error = priv_check(td, PRIV_NET_HWIOCTL);
2826 if (ifp->if_ioctl == NULL)
2827 return (EOPNOTSUPP);
2828 error = (*ifp->if_ioctl)(ifp, cmd, data);
2830 getmicrotime(&ifp->if_lastchange);
2834 case SIOCGIFPSRCADDR:
2835 case SIOCGIFPDSTADDR:
2838 case SIOCGIFGENERIC:
2840 case SIOCGIFRSSHASH:
2841 case SIOCGIFDOWNREASON:
2842 if (ifp->if_ioctl == NULL)
2843 return (EOPNOTSUPP);
2844 error = (*ifp->if_ioctl)(ifp, cmd, data);
2848 error = priv_check(td, PRIV_NET_SETLLADDR);
2851 error = if_setlladdr(ifp,
2852 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len);
2856 error = if_gethwaddr(ifp, ifr);
2859 case CASE_IOC_IFGROUPREQ(SIOCAIFGROUP):
2860 error = priv_check(td, PRIV_NET_ADDIFGROUP);
2863 if ((error = if_addgroup(ifp,
2864 ifgr_group_get((struct ifgroupreq *)data))))
2868 case CASE_IOC_IFGROUPREQ(SIOCGIFGROUP):
2870 struct epoch_tracker et;
2872 NET_EPOCH_ENTER(et);
2873 error = if_getgroup((struct ifgroupreq *)data, ifp);
2878 case CASE_IOC_IFGROUPREQ(SIOCDIFGROUP):
2879 error = priv_check(td, PRIV_NET_DELIFGROUP);
2882 if ((error = if_delgroup(ifp,
2883 ifgr_group_get((struct ifgroupreq *)data))))
2894 #ifdef COMPAT_FREEBSD32
2902 #define SIOCGIFCONF32 _IOWR('i', 36, struct ifconf32)
2905 #ifdef COMPAT_FREEBSD32
2907 ifmr_init(struct ifmediareq *ifmr, caddr_t data)
2909 struct ifmediareq32 *ifmr32;
2911 ifmr32 = (struct ifmediareq32 *)data;
2912 memcpy(ifmr->ifm_name, ifmr32->ifm_name,
2913 sizeof(ifmr->ifm_name));
2914 ifmr->ifm_current = ifmr32->ifm_current;
2915 ifmr->ifm_mask = ifmr32->ifm_mask;
2916 ifmr->ifm_status = ifmr32->ifm_status;
2917 ifmr->ifm_active = ifmr32->ifm_active;
2918 ifmr->ifm_count = ifmr32->ifm_count;
2919 ifmr->ifm_ulist = (int *)(uintptr_t)ifmr32->ifm_ulist;
2923 ifmr_update(const struct ifmediareq *ifmr, caddr_t data)
2925 struct ifmediareq32 *ifmr32;
2927 ifmr32 = (struct ifmediareq32 *)data;
2928 ifmr32->ifm_current = ifmr->ifm_current;
2929 ifmr32->ifm_mask = ifmr->ifm_mask;
2930 ifmr32->ifm_status = ifmr->ifm_status;
2931 ifmr32->ifm_active = ifmr->ifm_active;
2932 ifmr32->ifm_count = ifmr->ifm_count;
2940 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td)
2942 #ifdef COMPAT_FREEBSD32
2943 caddr_t saved_data = NULL;
2944 struct ifmediareq ifmr;
2945 struct ifmediareq *ifmrp = NULL;
2952 CURVNET_SET(so->so_vnet);
2954 /* Make sure the VNET is stable. */
2955 if (so->so_vnet->vnet_shutdown) {
2963 error = ifconf(cmd, data);
2966 #ifdef COMPAT_FREEBSD32
2969 struct ifconf32 *ifc32;
2972 ifc32 = (struct ifconf32 *)data;
2973 ifc.ifc_len = ifc32->ifc_len;
2974 ifc.ifc_buf = PTRIN(ifc32->ifc_buf);
2976 error = ifconf(SIOCGIFCONF, (void *)&ifc);
2978 ifc32->ifc_len = ifc.ifc_len;
2984 #ifdef COMPAT_FREEBSD32
2986 case SIOCGIFMEDIA32:
2987 case SIOCGIFXMEDIA32:
2989 ifmr_init(ifmrp, data);
2990 cmd = _IOC_NEWTYPE(cmd, struct ifmediareq);
2992 data = (caddr_t)ifmrp;
2996 ifr = (struct ifreq *)data;
3000 error = priv_check(td, PRIV_NET_SETIFVNET);
3002 error = if_vmove_reclaim(td, ifr->ifr_name,
3008 error = priv_check(td, PRIV_NET_IFCREATE);
3010 error = if_clone_create(ifr->ifr_name,
3011 sizeof(ifr->ifr_name), cmd == SIOCIFCREATE2 ?
3012 ifr_data_get_ptr(ifr) : NULL);
3015 error = priv_check(td, PRIV_NET_IFDESTROY);
3017 error = if_clone_destroy(ifr->ifr_name);
3020 case SIOCIFGCLONERS:
3021 error = if_clone_list((struct if_clonereq *)data);
3024 case CASE_IOC_IFGROUPREQ(SIOCGIFGMEMB):
3025 error = if_getgroupmembers((struct ifgroupreq *)data);
3028 #if defined(INET) || defined(INET6)
3031 if (carp_ioctl_p == NULL)
3032 error = EPROTONOSUPPORT;
3034 error = (*carp_ioctl_p)(ifr, cmd, td);
3039 ifp = ifunit_ref(ifr->ifr_name);
3045 error = ifhwioctl(cmd, ifp, data, td);
3046 if (error != ENOIOCTL)
3049 oif_flags = ifp->if_flags;
3050 if (so->so_proto == NULL) {
3056 * Pass the request on to the socket control method, and if the
3057 * latter returns EOPNOTSUPP, directly to the interface.
3059 * Make an exception for the legacy SIOCSIF* requests. Drivers
3060 * trust SIOCSIFADDR et al to come from an already privileged
3061 * layer, and do not perform any credentials checks or input
3064 error = ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data,
3066 if (error == EOPNOTSUPP && ifp != NULL && ifp->if_ioctl != NULL &&
3067 cmd != SIOCSIFADDR && cmd != SIOCSIFBRDADDR &&
3068 cmd != SIOCSIFDSTADDR && cmd != SIOCSIFNETMASK)
3069 error = (*ifp->if_ioctl)(ifp, cmd, data);
3071 if ((oif_flags ^ ifp->if_flags) & IFF_UP) {
3073 if (ifp->if_flags & IFF_UP)
3081 #ifdef COMPAT_FREEBSD32
3082 if (ifmrp != NULL) {
3083 KASSERT((cmd == SIOCGIFMEDIA || cmd == SIOCGIFXMEDIA),
3084 ("ifmrp non-NULL, but cmd is not an ifmedia req 0x%lx",
3087 ifmr_update(ifmrp, data);
3095 * The code common to handling reference counted flags,
3096 * e.g., in ifpromisc() and if_allmulti().
3097 * The "pflag" argument can specify a permanent mode flag to check,
3098 * such as IFF_PPROMISC for promiscuous mode; should be 0 if none.
3100 * Only to be used on stack-owned flags, not driver-owned flags.
3103 if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch)
3107 int oldflags, oldcount;
3109 /* Sanity checks to catch programming errors */
3110 KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0,
3111 ("%s: setting driver-owned flag %d", __func__, flag));
3114 KASSERT(*refcount >= 0,
3115 ("%s: increment negative refcount %d for flag %d",
3116 __func__, *refcount, flag));
3118 KASSERT(*refcount > 0,
3119 ("%s: decrement non-positive refcount %d for flag %d",
3120 __func__, *refcount, flag));
3122 /* In case this mode is permanent, just touch refcount */
3123 if (ifp->if_flags & pflag) {
3124 *refcount += onswitch ? 1 : -1;
3128 /* Save ifnet parameters for if_ioctl() may fail */
3129 oldcount = *refcount;
3130 oldflags = ifp->if_flags;
3133 * See if we aren't the only and touching refcount is enough.
3134 * Actually toggle interface flag if we are the first or last.
3139 ifp->if_flags |= flag;
3143 ifp->if_flags &= ~flag;
3146 /* Call down the driver since we've changed interface flags */
3147 if (ifp->if_ioctl == NULL) {
3151 ifr.ifr_flags = ifp->if_flags & 0xffff;
3152 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3153 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3156 /* Notify userland that interface flags have changed */
3161 /* Recover after driver error */
3162 *refcount = oldcount;
3163 ifp->if_flags = oldflags;
3168 * Set/clear promiscuous mode on interface ifp based on the truth value
3169 * of pswitch. The calls are reference counted so that only the first
3170 * "on" request actually has an effect, as does the final "off" request.
3171 * Results are undefined if the "off" and "on" requests are not matched.
3174 ifpromisc(struct ifnet *ifp, int pswitch)
3177 int oldflags = ifp->if_flags;
3179 error = if_setflag(ifp, IFF_PROMISC, IFF_PPROMISC,
3180 &ifp->if_pcount, pswitch);
3181 /* If promiscuous mode status has changed, log a message */
3182 if (error == 0 && ((ifp->if_flags ^ oldflags) & IFF_PROMISC) &&
3183 log_promisc_mode_change)
3184 if_printf(ifp, "promiscuous mode %s\n",
3185 (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled");
3190 * Return interface configuration
3191 * of system. List may be used
3192 * in later ioctl's (above) to get
3193 * other information.
3197 ifconf(u_long cmd, caddr_t data)
3199 struct ifconf *ifc = (struct ifconf *)data;
3204 int error, full = 0, valid_len, max_len;
3206 /* Limit initial buffer size to MAXPHYS to avoid DoS from userspace. */
3207 max_len = MAXPHYS - 1;
3209 /* Prevent hostile input from being able to crash the system */
3210 if (ifc->ifc_len <= 0)
3214 if (ifc->ifc_len <= max_len) {
3215 max_len = ifc->ifc_len;
3218 sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN);
3223 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
3224 struct epoch_tracker et;
3228 * Zero the ifr to make sure we don't disclose the contents
3231 memset(&ifr, 0, sizeof(ifr));
3233 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name))
3234 >= sizeof(ifr.ifr_name)) {
3237 return (ENAMETOOLONG);
3241 NET_EPOCH_ENTER(et);
3242 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
3243 struct sockaddr *sa = ifa->ifa_addr;
3245 if (prison_if(curthread->td_ucred, sa) != 0)
3248 if (sa->sa_len <= sizeof(*sa)) {
3249 if (sa->sa_len < sizeof(*sa)) {
3250 memset(&ifr.ifr_ifru.ifru_addr, 0,
3251 sizeof(ifr.ifr_ifru.ifru_addr));
3252 memcpy(&ifr.ifr_ifru.ifru_addr, sa,
3255 ifr.ifr_ifru.ifru_addr = *sa;
3256 sbuf_bcat(sb, &ifr, sizeof(ifr));
3257 max_len += sizeof(ifr);
3260 offsetof(struct ifreq, ifr_addr));
3261 max_len += offsetof(struct ifreq, ifr_addr);
3262 sbuf_bcat(sb, sa, sa->sa_len);
3263 max_len += sa->sa_len;
3266 if (sbuf_error(sb) == 0)
3267 valid_len = sbuf_len(sb);
3271 sbuf_bcat(sb, &ifr, sizeof(ifr));
3272 max_len += sizeof(ifr);
3274 if (sbuf_error(sb) == 0)
3275 valid_len = sbuf_len(sb);
3281 * If we didn't allocate enough space (uncommon), try again. If
3282 * we have already allocated as much space as we are allowed,
3283 * return what we've got.
3285 if (valid_len != max_len && !full) {
3290 ifc->ifc_len = valid_len;
3292 error = copyout(sbuf_data(sb), ifc->ifc_req, ifc->ifc_len);
3298 * Just like ifpromisc(), but for all-multicast-reception mode.
3301 if_allmulti(struct ifnet *ifp, int onswitch)
3304 return (if_setflag(ifp, IFF_ALLMULTI, 0, &ifp->if_amcount, onswitch));
3307 struct ifmultiaddr *
3308 if_findmulti(struct ifnet *ifp, const struct sockaddr *sa)
3310 struct ifmultiaddr *ifma;
3312 IF_ADDR_LOCK_ASSERT(ifp);
3314 CK_STAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
3315 if (sa->sa_family == AF_LINK) {
3316 if (sa_dl_equal(ifma->ifma_addr, sa))
3319 if (sa_equal(ifma->ifma_addr, sa))
3328 * Allocate a new ifmultiaddr and initialize based on passed arguments. We
3329 * make copies of passed sockaddrs. The ifmultiaddr will not be added to
3330 * the ifnet multicast address list here, so the caller must do that and
3331 * other setup work (such as notifying the device driver). The reference
3332 * count is initialized to 1.
3334 static struct ifmultiaddr *
3335 if_allocmulti(struct ifnet *ifp, struct sockaddr *sa, struct sockaddr *llsa,
3338 struct ifmultiaddr *ifma;
3339 struct sockaddr *dupsa;
3341 ifma = malloc(sizeof *ifma, M_IFMADDR, mflags |
3346 dupsa = malloc(sa->sa_len, M_IFMADDR, mflags);
3347 if (dupsa == NULL) {
3348 free(ifma, M_IFMADDR);
3351 bcopy(sa, dupsa, sa->sa_len);
3352 ifma->ifma_addr = dupsa;
3354 ifma->ifma_ifp = ifp;
3355 ifma->ifma_refcount = 1;
3356 ifma->ifma_protospec = NULL;
3359 ifma->ifma_lladdr = NULL;
3363 dupsa = malloc(llsa->sa_len, M_IFMADDR, mflags);
3364 if (dupsa == NULL) {
3365 free(ifma->ifma_addr, M_IFMADDR);
3366 free(ifma, M_IFMADDR);
3369 bcopy(llsa, dupsa, llsa->sa_len);
3370 ifma->ifma_lladdr = dupsa;
3376 * if_freemulti: free ifmultiaddr structure and possibly attached related
3377 * addresses. The caller is responsible for implementing reference
3378 * counting, notifying the driver, handling routing messages, and releasing
3379 * any dependent link layer state.
3381 #ifdef MCAST_VERBOSE
3382 extern void kdb_backtrace(void);
3385 if_freemulti_internal(struct ifmultiaddr *ifma)
3388 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti: refcount %d",
3389 ifma->ifma_refcount));
3391 if (ifma->ifma_lladdr != NULL)
3392 free(ifma->ifma_lladdr, M_IFMADDR);
3393 #ifdef MCAST_VERBOSE
3395 printf("%s freeing ifma: %p\n", __func__, ifma);
3397 free(ifma->ifma_addr, M_IFMADDR);
3398 free(ifma, M_IFMADDR);
3402 if_destroymulti(epoch_context_t ctx)
3404 struct ifmultiaddr *ifma;
3406 ifma = __containerof(ctx, struct ifmultiaddr, ifma_epoch_ctx);
3407 if_freemulti_internal(ifma);
3411 if_freemulti(struct ifmultiaddr *ifma)
3413 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti_epoch: refcount %d",
3414 ifma->ifma_refcount));
3416 epoch_call(net_epoch_preempt, &ifma->ifma_epoch_ctx, if_destroymulti);
3421 * Register an additional multicast address with a network interface.
3423 * - If the address is already present, bump the reference count on the
3424 * address and return.
3425 * - If the address is not link-layer, look up a link layer address.
3426 * - Allocate address structures for one or both addresses, and attach to the
3427 * multicast address list on the interface. If automatically adding a link
3428 * layer address, the protocol address will own a reference to the link
3429 * layer address, to be freed when it is freed.
3430 * - Notify the network device driver of an addition to the multicast address
3433 * 'sa' points to caller-owned memory with the desired multicast address.
3435 * 'retifma' will be used to return a pointer to the resulting multicast
3436 * address reference, if desired.
3439 if_addmulti(struct ifnet *ifp, struct sockaddr *sa,
3440 struct ifmultiaddr **retifma)
3442 struct ifmultiaddr *ifma, *ll_ifma;
3443 struct sockaddr *llsa;
3444 struct sockaddr_dl sdl;
3448 IN_MULTI_LIST_UNLOCK_ASSERT();
3451 IN6_MULTI_LIST_UNLOCK_ASSERT();
3454 * If the address is already present, return a new reference to it;
3455 * otherwise, allocate storage and set up a new address.
3458 ifma = if_findmulti(ifp, sa);
3460 ifma->ifma_refcount++;
3461 if (retifma != NULL)
3463 IF_ADDR_WUNLOCK(ifp);
3468 * The address isn't already present; resolve the protocol address
3469 * into a link layer address, and then look that up, bump its
3470 * refcount or allocate an ifma for that also.
3471 * Most link layer resolving functions returns address data which
3472 * fits inside default sockaddr_dl structure. However callback
3473 * can allocate another sockaddr structure, in that case we need to
3478 if (ifp->if_resolvemulti != NULL) {
3479 /* Provide called function with buffer size information */
3480 sdl.sdl_len = sizeof(sdl);
3481 llsa = (struct sockaddr *)&sdl;
3482 error = ifp->if_resolvemulti(ifp, &llsa, sa);
3488 * Allocate the new address. Don't hook it up yet, as we may also
3489 * need to allocate a link layer multicast address.
3491 ifma = if_allocmulti(ifp, sa, llsa, M_NOWAIT);
3498 * If a link layer address is found, we'll need to see if it's
3499 * already present in the address list, or allocate is as well.
3500 * When this block finishes, the link layer address will be on the
3504 ll_ifma = if_findmulti(ifp, llsa);
3505 if (ll_ifma == NULL) {
3506 ll_ifma = if_allocmulti(ifp, llsa, NULL, M_NOWAIT);
3507 if (ll_ifma == NULL) {
3508 --ifma->ifma_refcount;
3513 ll_ifma->ifma_flags |= IFMA_F_ENQUEUED;
3514 CK_STAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ll_ifma,
3517 ll_ifma->ifma_refcount++;
3518 ifma->ifma_llifma = ll_ifma;
3522 * We now have a new multicast address, ifma, and possibly a new or
3523 * referenced link layer address. Add the primary address to the
3524 * ifnet address list.
3526 ifma->ifma_flags |= IFMA_F_ENQUEUED;
3527 CK_STAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
3529 if (retifma != NULL)
3533 * Must generate the message while holding the lock so that 'ifma'
3534 * pointer is still valid.
3536 rt_newmaddrmsg(RTM_NEWMADDR, ifma);
3537 IF_ADDR_WUNLOCK(ifp);
3540 * We are certain we have added something, so call down to the
3541 * interface to let them know about it.
3543 if (ifp->if_ioctl != NULL) {
3544 if (THREAD_CAN_SLEEP())
3545 (void )(*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0);
3547 taskqueue_enqueue(taskqueue_swi, &ifp->if_addmultitask);
3550 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl))
3551 link_free_sdl(llsa);
3556 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl))
3557 link_free_sdl(llsa);
3560 IF_ADDR_WUNLOCK(ifp);
3565 if_siocaddmulti(void *arg, int pending)
3572 if_printf(ifp, "%d SIOCADDMULTI coalesced\n", pending);
3574 CURVNET_SET(ifp->if_vnet);
3575 (void )(*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0);
3580 * Delete a multicast group membership by network-layer group address.
3582 * Returns ENOENT if the entry could not be found. If ifp no longer
3583 * exists, results are undefined. This entry point should only be used
3584 * from subsystems which do appropriate locking to hold ifp for the
3585 * duration of the call.
3586 * Network-layer protocol domains must use if_delmulti_ifma().
3589 if_delmulti(struct ifnet *ifp, struct sockaddr *sa)
3591 struct ifmultiaddr *ifma;
3594 KASSERT(ifp, ("%s: NULL ifp", __func__));
3598 ifma = if_findmulti(ifp, sa);
3600 lastref = if_delmulti_locked(ifp, ifma, 0);
3601 IF_ADDR_WUNLOCK(ifp);
3606 if (lastref && ifp->if_ioctl != NULL) {
3607 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
3614 * Delete all multicast group membership for an interface.
3615 * Should be used to quickly flush all multicast filters.
3618 if_delallmulti(struct ifnet *ifp)
3620 struct ifmultiaddr *ifma;
3621 struct ifmultiaddr *next;
3624 CK_STAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next)
3625 if_delmulti_locked(ifp, ifma, 0);
3626 IF_ADDR_WUNLOCK(ifp);
3630 if_delmulti_ifma(struct ifmultiaddr *ifma)
3632 if_delmulti_ifma_flags(ifma, 0);
3636 * Delete a multicast group membership by group membership pointer.
3637 * Network-layer protocol domains must use this routine.
3639 * It is safe to call this routine if the ifp disappeared.
3642 if_delmulti_ifma_flags(struct ifmultiaddr *ifma, int flags)
3646 MCDPRINTF("%s freeing ifma: %p\n", __func__, ifma);
3648 IN_MULTI_LIST_UNLOCK_ASSERT();
3650 ifp = ifma->ifma_ifp;
3653 printf("%s: ifma_ifp seems to be detached\n", __func__);
3655 struct epoch_tracker et;
3658 NET_EPOCH_ENTER(et);
3659 CK_STAILQ_FOREACH(oifp, &V_ifnet, if_link)
3668 * If and only if the ifnet instance exists: Acquire the address lock.
3673 lastref = if_delmulti_locked(ifp, ifma, flags);
3677 * If and only if the ifnet instance exists:
3678 * Release the address lock.
3679 * If the group was left: update the hardware hash filter.
3681 IF_ADDR_WUNLOCK(ifp);
3682 if (lastref && ifp->if_ioctl != NULL) {
3683 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
3689 * Perform deletion of network-layer and/or link-layer multicast address.
3691 * Return 0 if the reference count was decremented.
3692 * Return 1 if the final reference was released, indicating that the
3693 * hardware hash filter should be reprogrammed.
3696 if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching)
3698 struct ifmultiaddr *ll_ifma;
3700 if (ifp != NULL && ifma->ifma_ifp != NULL) {
3701 KASSERT(ifma->ifma_ifp == ifp,
3702 ("%s: inconsistent ifp %p", __func__, ifp));
3703 IF_ADDR_WLOCK_ASSERT(ifp);
3706 ifp = ifma->ifma_ifp;
3707 MCDPRINTF("%s freeing %p from %s \n", __func__, ifma, ifp ? ifp->if_xname : "");
3710 * If the ifnet is detaching, null out references to ifnet,
3711 * so that upper protocol layers will notice, and not attempt
3712 * to obtain locks for an ifnet which no longer exists. The
3713 * routing socket announcement must happen before the ifnet
3714 * instance is detached from the system.
3718 printf("%s: detaching ifnet instance %p\n", __func__, ifp);
3721 * ifp may already be nulled out if we are being reentered
3722 * to delete the ll_ifma.
3725 rt_newmaddrmsg(RTM_DELMADDR, ifma);
3726 ifma->ifma_ifp = NULL;
3730 if (--ifma->ifma_refcount > 0)
3733 if (ifp != NULL && detaching == 0 && (ifma->ifma_flags & IFMA_F_ENQUEUED)) {
3734 CK_STAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifmultiaddr, ifma_link);
3735 ifma->ifma_flags &= ~IFMA_F_ENQUEUED;
3738 * If this ifma is a network-layer ifma, a link-layer ifma may
3739 * have been associated with it. Release it first if so.
3741 ll_ifma = ifma->ifma_llifma;
3742 if (ll_ifma != NULL) {
3743 KASSERT(ifma->ifma_lladdr != NULL,
3744 ("%s: llifma w/o lladdr", __func__));
3746 ll_ifma->ifma_ifp = NULL; /* XXX */
3747 if (--ll_ifma->ifma_refcount == 0) {
3749 if (ll_ifma->ifma_flags & IFMA_F_ENQUEUED) {
3750 CK_STAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma, ifmultiaddr,
3752 ll_ifma->ifma_flags &= ~IFMA_F_ENQUEUED;
3755 if_freemulti(ll_ifma);
3760 struct ifmultiaddr *ifmatmp;
3762 CK_STAILQ_FOREACH(ifmatmp, &ifp->if_multiaddrs, ifma_link)
3763 MPASS(ifma != ifmatmp);
3768 * The last reference to this instance of struct ifmultiaddr
3769 * was released; the hardware should be notified of this change.
3775 * Set the link layer address on an interface.
3777 * At this time we only support certain types of interfaces,
3778 * and we don't allow the length of the address to change.
3780 * Set noinline to be dtrace-friendly
3783 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len)
3785 struct sockaddr_dl *sdl;
3793 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
3797 if (len != sdl->sdl_alen) /* don't allow length to change */
3800 switch (ifp->if_type) {
3805 case IFT_IEEE8023ADLAG:
3806 bcopy(lladdr, LLADDR(sdl), len);
3813 * If the interface is already up, we need
3814 * to re-init it in order to reprogram its
3817 if ((ifp->if_flags & IFF_UP) != 0) {
3818 if (ifp->if_ioctl) {
3819 ifp->if_flags &= ~IFF_UP;
3820 ifr.ifr_flags = ifp->if_flags & 0xffff;
3821 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3822 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3823 ifp->if_flags |= IFF_UP;
3824 ifr.ifr_flags = ifp->if_flags & 0xffff;
3825 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3826 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3829 EVENTHANDLER_INVOKE(iflladdr_event, ifp);
3835 * Compat function for handling basic encapsulation requests.
3836 * Not converted stacks (FDDI, IB, ..) supports traditional
3837 * output model: ARP (and other similar L2 protocols) are handled
3838 * inside output routine, arpresolve/nd6_resolve() returns MAC
3839 * address instead of full prepend.
3841 * This function creates calculated header==MAC for IPv4/IPv6 and
3842 * returns EAFNOSUPPORT (which is then handled in ARP code) for other
3846 if_requestencap_default(struct ifnet *ifp, struct if_encap_req *req)
3849 if (req->rtype != IFENCAP_LL)
3850 return (EOPNOTSUPP);
3852 if (req->bufsize < req->lladdr_len)
3855 switch (req->family) {
3860 return (EAFNOSUPPORT);
3863 /* Copy lladdr to storage as is */
3864 memmove(req->buf, req->lladdr, req->lladdr_len);
3865 req->bufsize = req->lladdr_len;
3866 req->lladdr_off = 0;
3872 * Tunnel interfaces can nest, also they may cause infinite recursion
3873 * calls when misconfigured. We'll prevent this by detecting loops.
3874 * High nesting level may cause stack exhaustion. We'll prevent this
3875 * by introducing upper limit.
3877 * Return 0, if tunnel nesting count is equal or less than limit.
3880 if_tunnel_check_nesting(struct ifnet *ifp, struct mbuf *m, uint32_t cookie,
3888 while ((mtag = m_tag_locate(m, cookie, 0, mtag)) != NULL) {
3889 if (*(struct ifnet **)(mtag + 1) == ifp) {
3890 log(LOG_NOTICE, "%s: loop detected\n", if_name(ifp));
3895 if (count > limit) {
3897 "%s: if_output recursively called too many times(%d)\n",
3898 if_name(ifp), count);
3901 mtag = m_tag_alloc(cookie, 0, sizeof(struct ifnet *), M_NOWAIT);
3904 *(struct ifnet **)(mtag + 1) = ifp;
3905 m_tag_prepend(m, mtag);
3910 * Get the link layer address that was read from the hardware at attach.
3912 * This is only set by Ethernet NICs (IFT_ETHER), but laggX interfaces re-type
3913 * their component interfaces as IFT_IEEE8023ADLAG.
3916 if_gethwaddr(struct ifnet *ifp, struct ifreq *ifr)
3919 if (ifp->if_hw_addr == NULL)
3922 switch (ifp->if_type) {
3924 case IFT_IEEE8023ADLAG:
3925 bcopy(ifp->if_hw_addr, ifr->ifr_addr.sa_data, ifp->if_addrlen);
3933 * The name argument must be a pointer to storage which will last as
3934 * long as the interface does. For physical devices, the result of
3935 * device_get_name(dev) is a good choice and for pseudo-devices a
3936 * static string works well.
3939 if_initname(struct ifnet *ifp, const char *name, int unit)
3941 ifp->if_dname = name;
3942 ifp->if_dunit = unit;
3943 if (unit != IF_DUNIT_NONE)
3944 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit);
3946 strlcpy(ifp->if_xname, name, IFNAMSIZ);
3950 if_printf(struct ifnet *ifp, const char *fmt, ...)
3955 snprintf(if_fmt, sizeof(if_fmt), "%s: %s", ifp->if_xname, fmt);
3957 vlog(LOG_INFO, if_fmt, ap);
3963 if_start(struct ifnet *ifp)
3966 (*(ifp)->if_start)(ifp);
3970 * Backwards compatibility interface for drivers
3971 * that have not implemented it
3974 if_transmit(struct ifnet *ifp, struct mbuf *m)
3978 IFQ_HANDOFF(ifp, m, error);
3983 if_input_default(struct ifnet *ifp __unused, struct mbuf *m)
3990 if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust)
3995 if (_IF_QFULL(ifq)) {
3997 if_inc_counter(ifp, IFCOUNTER_OQDROPS, 1);
4002 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len + adjust);
4003 if (m->m_flags & (M_BCAST|M_MCAST))
4004 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1);
4005 active = ifp->if_drv_flags & IFF_DRV_OACTIVE;
4007 _IF_ENQUEUE(ifq, m);
4009 if (ifp != NULL && !active)
4010 (*(ifp)->if_start)(ifp);
4015 if_register_com_alloc(u_char type,
4016 if_com_alloc_t *a, if_com_free_t *f)
4019 KASSERT(if_com_alloc[type] == NULL,
4020 ("if_register_com_alloc: %d already registered", type));
4021 KASSERT(if_com_free[type] == NULL,
4022 ("if_register_com_alloc: %d free already registered", type));
4024 if_com_alloc[type] = a;
4025 if_com_free[type] = f;
4029 if_deregister_com_alloc(u_char type)
4032 KASSERT(if_com_alloc[type] != NULL,
4033 ("if_deregister_com_alloc: %d not registered", type));
4034 KASSERT(if_com_free[type] != NULL,
4035 ("if_deregister_com_alloc: %d free not registered", type));
4036 if_com_alloc[type] = NULL;
4037 if_com_free[type] = NULL;
4040 /* API for driver access to network stack owned ifnet.*/
4042 if_setbaudrate(struct ifnet *ifp, uint64_t baudrate)
4046 oldbrate = ifp->if_baudrate;
4047 ifp->if_baudrate = baudrate;
4052 if_getbaudrate(if_t ifp)
4055 return (((struct ifnet *)ifp)->if_baudrate);
4059 if_setcapabilities(if_t ifp, int capabilities)
4061 ((struct ifnet *)ifp)->if_capabilities = capabilities;
4066 if_setcapabilitiesbit(if_t ifp, int setbit, int clearbit)
4068 ((struct ifnet *)ifp)->if_capabilities |= setbit;
4069 ((struct ifnet *)ifp)->if_capabilities &= ~clearbit;
4075 if_getcapabilities(if_t ifp)
4077 return ((struct ifnet *)ifp)->if_capabilities;
4081 if_setcapenable(if_t ifp, int capabilities)
4083 ((struct ifnet *)ifp)->if_capenable = capabilities;
4088 if_setcapenablebit(if_t ifp, int setcap, int clearcap)
4091 ((struct ifnet *)ifp)->if_capenable |= setcap;
4093 ((struct ifnet *)ifp)->if_capenable &= ~clearcap;
4099 if_getdname(if_t ifp)
4101 return ((struct ifnet *)ifp)->if_dname;
4105 if_togglecapenable(if_t ifp, int togglecap)
4107 ((struct ifnet *)ifp)->if_capenable ^= togglecap;
4112 if_getcapenable(if_t ifp)
4114 return ((struct ifnet *)ifp)->if_capenable;
4118 * This is largely undesirable because it ties ifnet to a device, but does
4119 * provide flexiblity for an embedded product vendor. Should be used with
4120 * the understanding that it violates the interface boundaries, and should be
4121 * a last resort only.
4124 if_setdev(if_t ifp, void *dev)
4130 if_setdrvflagbits(if_t ifp, int set_flags, int clear_flags)
4132 ((struct ifnet *)ifp)->if_drv_flags |= set_flags;
4133 ((struct ifnet *)ifp)->if_drv_flags &= ~clear_flags;
4139 if_getdrvflags(if_t ifp)
4141 return ((struct ifnet *)ifp)->if_drv_flags;
4145 if_setdrvflags(if_t ifp, int flags)
4147 ((struct ifnet *)ifp)->if_drv_flags = flags;
4153 if_setflags(if_t ifp, int flags)
4155 ((struct ifnet *)ifp)->if_flags = flags;
4160 if_setflagbits(if_t ifp, int set, int clear)
4162 ((struct ifnet *)ifp)->if_flags |= set;
4163 ((struct ifnet *)ifp)->if_flags &= ~clear;
4169 if_getflags(if_t ifp)
4171 return ((struct ifnet *)ifp)->if_flags;
4175 if_clearhwassist(if_t ifp)
4177 ((struct ifnet *)ifp)->if_hwassist = 0;
4182 if_sethwassistbits(if_t ifp, int toset, int toclear)
4184 ((struct ifnet *)ifp)->if_hwassist |= toset;
4185 ((struct ifnet *)ifp)->if_hwassist &= ~toclear;
4191 if_sethwassist(if_t ifp, int hwassist_bit)
4193 ((struct ifnet *)ifp)->if_hwassist = hwassist_bit;
4198 if_gethwassist(if_t ifp)
4200 return ((struct ifnet *)ifp)->if_hwassist;
4204 if_setmtu(if_t ifp, int mtu)
4206 ((struct ifnet *)ifp)->if_mtu = mtu;
4213 return ((struct ifnet *)ifp)->if_mtu;
4217 if_getmtu_family(if_t ifp, int family)
4221 for (dp = domains; dp; dp = dp->dom_next) {
4222 if (dp->dom_family == family && dp->dom_ifmtu != NULL)
4223 return (dp->dom_ifmtu((struct ifnet *)ifp));
4226 return (((struct ifnet *)ifp)->if_mtu);
4230 * Methods for drivers to access interface unicast and multicast
4231 * link level addresses. Driver shall not know 'struct ifaddr' neither
4232 * 'struct ifmultiaddr'.
4235 if_lladdr_count(if_t ifp)
4237 struct epoch_tracker et;
4242 NET_EPOCH_ENTER(et);
4243 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
4244 if (ifa->ifa_addr->sa_family == AF_LINK)
4252 if_foreach_lladdr(if_t ifp, iflladdr_cb_t cb, void *cb_arg)
4254 struct epoch_tracker et;
4261 NET_EPOCH_ENTER(et);
4262 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
4263 if (ifa->ifa_addr->sa_family != AF_LINK)
4265 count += (*cb)(cb_arg, (struct sockaddr_dl *)ifa->ifa_addr,
4274 if_llmaddr_count(if_t ifp)
4276 struct epoch_tracker et;
4277 struct ifmultiaddr *ifma;
4281 NET_EPOCH_ENTER(et);
4282 CK_STAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
4283 if (ifma->ifma_addr->sa_family == AF_LINK)
4291 if_foreach_llmaddr(if_t ifp, iflladdr_cb_t cb, void *cb_arg)
4293 struct epoch_tracker et;
4294 struct ifmultiaddr *ifma;
4300 NET_EPOCH_ENTER(et);
4301 CK_STAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
4302 if (ifma->ifma_addr->sa_family != AF_LINK)
4304 count += (*cb)(cb_arg, (struct sockaddr_dl *)ifma->ifma_addr,
4313 if_setsoftc(if_t ifp, void *softc)
4315 ((struct ifnet *)ifp)->if_softc = softc;
4320 if_getsoftc(if_t ifp)
4322 return ((struct ifnet *)ifp)->if_softc;
4326 if_setrcvif(struct mbuf *m, if_t ifp)
4329 MPASS((m->m_pkthdr.csum_flags & CSUM_SND_TAG) == 0);
4330 m->m_pkthdr.rcvif = (struct ifnet *)ifp;
4334 if_setvtag(struct mbuf *m, uint16_t tag)
4336 m->m_pkthdr.ether_vtag = tag;
4340 if_getvtag(struct mbuf *m)
4343 return (m->m_pkthdr.ether_vtag);
4347 if_sendq_empty(if_t ifp)
4349 return IFQ_DRV_IS_EMPTY(&((struct ifnet *)ifp)->if_snd);
4353 if_getifaddr(if_t ifp)
4355 return ((struct ifnet *)ifp)->if_addr;
4359 if_getamcount(if_t ifp)
4361 return ((struct ifnet *)ifp)->if_amcount;
4366 if_setsendqready(if_t ifp)
4368 IFQ_SET_READY(&((struct ifnet *)ifp)->if_snd);
4373 if_setsendqlen(if_t ifp, int tx_desc_count)
4375 IFQ_SET_MAXLEN(&((struct ifnet *)ifp)->if_snd, tx_desc_count);
4376 ((struct ifnet *)ifp)->if_snd.ifq_drv_maxlen = tx_desc_count;
4382 if_vlantrunkinuse(if_t ifp)
4384 return ((struct ifnet *)ifp)->if_vlantrunk != NULL?1:0;
4388 if_input(if_t ifp, struct mbuf* sendmp)
4390 (*((struct ifnet *)ifp)->if_input)((struct ifnet *)ifp, sendmp);
4396 if_dequeue(if_t ifp)
4399 IFQ_DRV_DEQUEUE(&((struct ifnet *)ifp)->if_snd, m);
4405 if_sendq_prepend(if_t ifp, struct mbuf *m)
4407 IFQ_DRV_PREPEND(&((struct ifnet *)ifp)->if_snd, m);
4412 if_setifheaderlen(if_t ifp, int len)
4414 ((struct ifnet *)ifp)->if_hdrlen = len;
4419 if_getlladdr(if_t ifp)
4421 return (IF_LLADDR((struct ifnet *)ifp));
4425 if_gethandle(u_char type)
4427 return (if_alloc(type));
4431 if_bpfmtap(if_t ifh, struct mbuf *m)
4433 struct ifnet *ifp = (struct ifnet *)ifh;
4439 if_etherbpfmtap(if_t ifh, struct mbuf *m)
4441 struct ifnet *ifp = (struct ifnet *)ifh;
4443 ETHER_BPF_MTAP(ifp, m);
4447 if_vlancap(if_t ifh)
4449 struct ifnet *ifp = (struct ifnet *)ifh;
4450 VLAN_CAPABILITIES(ifp);
4454 if_sethwtsomax(if_t ifp, u_int if_hw_tsomax)
4457 ((struct ifnet *)ifp)->if_hw_tsomax = if_hw_tsomax;
4462 if_sethwtsomaxsegcount(if_t ifp, u_int if_hw_tsomaxsegcount)
4465 ((struct ifnet *)ifp)->if_hw_tsomaxsegcount = if_hw_tsomaxsegcount;
4470 if_sethwtsomaxsegsize(if_t ifp, u_int if_hw_tsomaxsegsize)
4473 ((struct ifnet *)ifp)->if_hw_tsomaxsegsize = if_hw_tsomaxsegsize;
4478 if_gethwtsomax(if_t ifp)
4481 return (((struct ifnet *)ifp)->if_hw_tsomax);
4485 if_gethwtsomaxsegcount(if_t ifp)
4488 return (((struct ifnet *)ifp)->if_hw_tsomaxsegcount);
4492 if_gethwtsomaxsegsize(if_t ifp)
4495 return (((struct ifnet *)ifp)->if_hw_tsomaxsegsize);
4499 if_setinitfn(if_t ifp, void (*init_fn)(void *))
4501 ((struct ifnet *)ifp)->if_init = init_fn;
4505 if_setioctlfn(if_t ifp, int (*ioctl_fn)(if_t, u_long, caddr_t))
4507 ((struct ifnet *)ifp)->if_ioctl = (void *)ioctl_fn;
4511 if_setstartfn(if_t ifp, void (*start_fn)(if_t))
4513 ((struct ifnet *)ifp)->if_start = (void *)start_fn;
4517 if_settransmitfn(if_t ifp, if_transmit_fn_t start_fn)
4519 ((struct ifnet *)ifp)->if_transmit = start_fn;
4522 void if_setqflushfn(if_t ifp, if_qflush_fn_t flush_fn)
4524 ((struct ifnet *)ifp)->if_qflush = flush_fn;
4529 if_setgetcounterfn(if_t ifp, if_get_counter_t fn)
4532 ifp->if_get_counter = fn;
4535 /* Revisit these - These are inline functions originally. */
4537 drbr_inuse_drv(if_t ifh, struct buf_ring *br)
4539 return drbr_inuse(ifh, br);
4543 drbr_dequeue_drv(if_t ifh, struct buf_ring *br)
4545 return drbr_dequeue(ifh, br);
4549 drbr_needs_enqueue_drv(if_t ifh, struct buf_ring *br)
4551 return drbr_needs_enqueue(ifh, br);
4555 drbr_enqueue_drv(if_t ifh, struct buf_ring *br, struct mbuf *m)
4557 return drbr_enqueue(ifh, br, m);