2 * Copyright (c) 1980, 1986, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * @(#)if.c 8.5 (Berkeley) 1/9/95
33 #include "opt_compat.h"
34 #include "opt_inet6.h"
37 #include <sys/param.h>
38 #include <sys/types.h>
40 #include <sys/malloc.h>
44 #include <sys/systm.h>
47 #include <sys/socket.h>
48 #include <sys/socketvar.h>
49 #include <sys/protosw.h>
50 #include <sys/kernel.h>
52 #include <sys/refcount.h>
53 #include <sys/module.h>
54 #include <sys/rwlock.h>
55 #include <sys/sockio.h>
56 #include <sys/syslog.h>
57 #include <sys/sysctl.h>
58 #include <sys/taskqueue.h>
59 #include <sys/domain.h>
63 #include <machine/stdarg.h>
67 #include <net/ethernet.h>
69 #include <net/if_arp.h>
70 #include <net/if_clone.h>
71 #include <net/if_dl.h>
72 #include <net/if_types.h>
73 #include <net/if_var.h>
74 #include <net/if_media.h>
75 #include <net/if_vlan_var.h>
76 #include <net/radix.h>
77 #include <net/route.h>
80 #if defined(INET) || defined(INET6)
81 #include <net/ethernet.h>
82 #include <netinet/in.h>
83 #include <netinet/in_var.h>
84 #include <netinet/ip.h>
85 #include <netinet/ip_carp.h>
87 #include <netinet/if_ether.h>
90 #include <netinet6/in6_var.h>
91 #include <netinet6/in6_ifattach.h>
93 #endif /* INET || INET6 */
95 #include <security/mac/mac_framework.h>
97 #ifdef COMPAT_FREEBSD32
98 #include <sys/mount.h>
99 #include <compat/freebsd32/freebsd32.h>
102 SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers");
103 SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management");
105 SYSCTL_INT(_net_link, OID_AUTO, ifqmaxlen, CTLFLAG_RDTUN,
106 &ifqmaxlen, 0, "max send queue size");
108 /* Log link state change events */
109 static int log_link_state_change = 1;
111 SYSCTL_INT(_net_link, OID_AUTO, log_link_state_change, CTLFLAG_RW,
112 &log_link_state_change, 0,
113 "log interface link state change events");
115 /* Log promiscuous mode change events */
116 static int log_promisc_mode_change = 1;
118 SYSCTL_INT(_net_link, OID_AUTO, log_promisc_mode_change, CTLFLAG_RDTUN,
119 &log_promisc_mode_change, 1,
120 "log promiscuous mode change events");
122 /* Interface description */
123 static unsigned int ifdescr_maxlen = 1024;
124 SYSCTL_UINT(_net, OID_AUTO, ifdescr_maxlen, CTLFLAG_RW,
126 "administrative maximum length for interface description");
128 static MALLOC_DEFINE(M_IFDESCR, "ifdescr", "ifnet descriptions");
130 /* global sx for non-critical path ifdescr */
131 static struct sx ifdescr_sx;
132 SX_SYSINIT(ifdescr_sx, &ifdescr_sx, "ifnet descr");
134 void (*bridge_linkstate_p)(struct ifnet *ifp);
135 void (*ng_ether_link_state_p)(struct ifnet *ifp, int state);
136 void (*lagg_linkstate_p)(struct ifnet *ifp, int state);
137 /* These are external hooks for CARP. */
138 void (*carp_linkstate_p)(struct ifnet *ifp);
139 void (*carp_demote_adj_p)(int, char *);
140 int (*carp_master_p)(struct ifaddr *);
141 #if defined(INET) || defined(INET6)
142 int (*carp_forus_p)(struct ifnet *ifp, u_char *dhost);
143 int (*carp_output_p)(struct ifnet *ifp, struct mbuf *m,
144 const struct sockaddr *sa);
145 int (*carp_ioctl_p)(struct ifreq *, u_long, struct thread *);
146 int (*carp_attach_p)(struct ifaddr *, int);
147 void (*carp_detach_p)(struct ifaddr *, bool);
150 int (*carp_iamatch_p)(struct ifaddr *, uint8_t **);
153 struct ifaddr *(*carp_iamatch6_p)(struct ifnet *ifp, struct in6_addr *taddr6);
154 caddr_t (*carp_macmatch6_p)(struct ifnet *ifp, struct mbuf *m,
155 const struct in6_addr *taddr);
158 struct mbuf *(*tbr_dequeue_ptr)(struct ifaltq *, int) = NULL;
161 * XXX: Style; these should be sorted alphabetically, and unprototyped
162 * static functions should be prototyped. Currently they are sorted by
165 static void if_attachdomain(void *);
166 static void if_attachdomain1(struct ifnet *);
167 static int ifconf(u_long, caddr_t);
168 static void if_freemulti(struct ifmultiaddr *);
169 static void if_grow(void);
170 static void if_input_default(struct ifnet *, struct mbuf *);
171 static int if_requestencap_default(struct ifnet *, struct if_encap_req *);
172 static void if_route(struct ifnet *, int flag, int fam);
173 static int if_setflag(struct ifnet *, int, int, int *, int);
174 static int if_transmit(struct ifnet *ifp, struct mbuf *m);
175 static void if_unroute(struct ifnet *, int flag, int fam);
176 static void link_rtrequest(int, struct rtentry *, struct rt_addrinfo *);
177 static int ifhwioctl(u_long, struct ifnet *, caddr_t, struct thread *);
178 static int if_delmulti_locked(struct ifnet *, struct ifmultiaddr *, int);
179 static void do_link_state_change(void *, int);
180 static int if_getgroup(struct ifgroupreq *, struct ifnet *);
181 static int if_getgroupmembers(struct ifgroupreq *);
182 static void if_delgroups(struct ifnet *);
183 static void if_attach_internal(struct ifnet *, int, struct if_clone *);
184 static int if_detach_internal(struct ifnet *, int, struct if_clone **);
186 static void if_vmove(struct ifnet *, struct vnet *);
191 * XXX: declare here to avoid to include many inet6 related files..
192 * should be more generalized?
194 extern void nd6_setmtu(struct ifnet *);
197 /* ipsec helper hooks */
198 VNET_DEFINE(struct hhook_head *, ipsec_hhh_in[HHOOK_IPSEC_COUNT]);
199 VNET_DEFINE(struct hhook_head *, ipsec_hhh_out[HHOOK_IPSEC_COUNT]);
201 VNET_DEFINE(int, if_index);
202 int ifqmaxlen = IFQ_MAXLEN;
203 VNET_DEFINE(struct ifnethead, ifnet); /* depend on static init XXX */
204 VNET_DEFINE(struct ifgrouphead, ifg_head);
206 static VNET_DEFINE(int, if_indexlim) = 8;
208 /* Table of ifnet by index. */
209 VNET_DEFINE(struct ifnet **, ifindex_table);
211 #define V_if_indexlim VNET(if_indexlim)
212 #define V_ifindex_table VNET(ifindex_table)
215 * The global network interface list (V_ifnet) and related state (such as
216 * if_index, if_indexlim, and ifindex_table) are protected by an sxlock and
217 * an rwlock. Either may be acquired shared to stablize the list, but both
218 * must be acquired writable to modify the list. This model allows us to
219 * both stablize the interface list during interrupt thread processing, but
220 * also to stablize it over long-running ioctls, without introducing priority
221 * inversions and deadlocks.
223 struct rwlock ifnet_rwlock;
224 RW_SYSINIT_FLAGS(ifnet_rw, &ifnet_rwlock, "ifnet_rw", RW_RECURSE);
225 struct sx ifnet_sxlock;
226 SX_SYSINIT_FLAGS(ifnet_sx, &ifnet_sxlock, "ifnet_sx", SX_RECURSE);
229 * The allocation of network interfaces is a rather non-atomic affair; we
230 * need to select an index before we are ready to expose the interface for
231 * use, so will use this pointer value to indicate reservation.
233 #define IFNET_HOLD (void *)(uintptr_t)(-1)
235 static if_com_alloc_t *if_com_alloc[256];
236 static if_com_free_t *if_com_free[256];
238 static MALLOC_DEFINE(M_IFNET, "ifnet", "interface internals");
239 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address");
240 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address");
243 ifnet_byindex_locked(u_short idx)
246 if (idx > V_if_index)
248 if (V_ifindex_table[idx] == IFNET_HOLD)
250 return (V_ifindex_table[idx]);
254 ifnet_byindex(u_short idx)
258 IFNET_RLOCK_NOSLEEP();
259 ifp = ifnet_byindex_locked(idx);
260 IFNET_RUNLOCK_NOSLEEP();
265 ifnet_byindex_ref(u_short idx)
269 IFNET_RLOCK_NOSLEEP();
270 ifp = ifnet_byindex_locked(idx);
271 if (ifp == NULL || (ifp->if_flags & IFF_DYING)) {
272 IFNET_RUNLOCK_NOSLEEP();
276 IFNET_RUNLOCK_NOSLEEP();
281 * Allocate an ifindex array entry; return 0 on success or an error on
289 IFNET_WLOCK_ASSERT();
292 * Try to find an empty slot below V_if_index. If we fail, take the
295 for (idx = 1; idx <= V_if_index; idx++) {
296 if (V_ifindex_table[idx] == NULL)
300 /* Catch if_index overflow. */
301 if (idx >= V_if_indexlim) {
305 if (idx > V_if_index)
311 ifindex_free_locked(u_short idx)
314 IFNET_WLOCK_ASSERT();
316 V_ifindex_table[idx] = NULL;
317 while (V_if_index > 0 &&
318 V_ifindex_table[V_if_index] == NULL)
323 ifindex_free(u_short idx)
327 ifindex_free_locked(idx);
332 ifnet_setbyindex_locked(u_short idx, struct ifnet *ifp)
335 IFNET_WLOCK_ASSERT();
337 V_ifindex_table[idx] = ifp;
341 ifnet_setbyindex(u_short idx, struct ifnet *ifp)
345 ifnet_setbyindex_locked(idx, ifp);
350 ifaddr_byindex(u_short idx)
353 struct ifaddr *ifa = NULL;
355 IFNET_RLOCK_NOSLEEP();
356 ifp = ifnet_byindex_locked(idx);
357 if (ifp != NULL && (ifa = ifp->if_addr) != NULL)
359 IFNET_RUNLOCK_NOSLEEP();
364 * Network interface utility routines.
366 * Routines with ifa_ifwith* names take sockaddr *'s as
371 vnet_if_init(const void *unused __unused)
374 TAILQ_INIT(&V_ifnet);
375 TAILQ_INIT(&V_ifg_head);
377 if_grow(); /* create initial table */
379 vnet_if_clone_init();
381 VNET_SYSINIT(vnet_if_init, SI_SUB_INIT_IF, SI_ORDER_SECOND, vnet_if_init,
386 vnet_if_uninit(const void *unused __unused)
389 VNET_ASSERT(TAILQ_EMPTY(&V_ifnet), ("%s:%d tailq &V_ifnet=%p "
390 "not empty", __func__, __LINE__, &V_ifnet));
391 VNET_ASSERT(TAILQ_EMPTY(&V_ifg_head), ("%s:%d tailq &V_ifg_head=%p "
392 "not empty", __func__, __LINE__, &V_ifg_head));
394 free((caddr_t)V_ifindex_table, M_IFNET);
396 VNET_SYSUNINIT(vnet_if_uninit, SI_SUB_INIT_IF, SI_ORDER_FIRST,
397 vnet_if_uninit, NULL);
400 vnet_if_return(const void *unused __unused)
402 struct ifnet *ifp, *nifp;
404 /* Return all inherited interfaces to their parent vnets. */
405 TAILQ_FOREACH_SAFE(ifp, &V_ifnet, if_link, nifp) {
406 if (ifp->if_home_vnet != ifp->if_vnet)
407 if_vmove(ifp, ifp->if_home_vnet);
410 VNET_SYSUNINIT(vnet_if_return, SI_SUB_VNET_DONE, SI_ORDER_ANY,
411 vnet_if_return, NULL);
421 IFNET_WLOCK_ASSERT();
422 oldlim = V_if_indexlim;
424 n = (oldlim << 1) * sizeof(*e);
425 e = malloc(n, M_IFNET, M_WAITOK | M_ZERO);
427 if (V_if_indexlim != oldlim) {
431 if (V_ifindex_table != NULL) {
432 memcpy((caddr_t)e, (caddr_t)V_ifindex_table, n/2);
433 free((caddr_t)V_ifindex_table, M_IFNET);
440 * Allocate a struct ifnet and an index for an interface. A layer 2
441 * common structure will also be allocated if an allocation routine is
442 * registered for the passed type.
445 if_alloc(u_char type)
450 ifp = malloc(sizeof(struct ifnet), M_IFNET, M_WAITOK|M_ZERO);
452 idx = ifindex_alloc();
453 ifnet_setbyindex_locked(idx, IFNET_HOLD);
457 ifp->if_alloctype = type;
459 ifp->if_vnet = curvnet;
461 if (if_com_alloc[type] != NULL) {
462 ifp->if_l2com = if_com_alloc[type](type, ifp);
463 if (ifp->if_l2com == NULL) {
470 IF_ADDR_LOCK_INIT(ifp);
471 TASK_INIT(&ifp->if_linktask, 0, do_link_state_change, ifp);
472 ifp->if_afdata_initialized = 0;
473 IF_AFDATA_LOCK_INIT(ifp);
474 TAILQ_INIT(&ifp->if_addrhead);
475 TAILQ_INIT(&ifp->if_multiaddrs);
476 TAILQ_INIT(&ifp->if_groups);
480 ifq_init(&ifp->if_snd, ifp);
482 refcount_init(&ifp->if_refcount, 1); /* Index reference. */
483 for (int i = 0; i < IFCOUNTERS; i++)
484 ifp->if_counters[i] = counter_u64_alloc(M_WAITOK);
485 ifp->if_get_counter = if_get_counter_default;
486 ifnet_setbyindex(ifp->if_index, ifp);
491 * Do the actual work of freeing a struct ifnet, and layer 2 common
492 * structure. This call is made when the last reference to an
493 * interface is released.
496 if_free_internal(struct ifnet *ifp)
499 KASSERT((ifp->if_flags & IFF_DYING),
500 ("if_free_internal: interface not dying"));
502 if (if_com_free[ifp->if_alloctype] != NULL)
503 if_com_free[ifp->if_alloctype](ifp->if_l2com,
507 mac_ifnet_destroy(ifp);
509 if (ifp->if_description != NULL)
510 free(ifp->if_description, M_IFDESCR);
511 IF_AFDATA_DESTROY(ifp);
512 IF_ADDR_LOCK_DESTROY(ifp);
513 ifq_delete(&ifp->if_snd);
515 for (int i = 0; i < IFCOUNTERS; i++)
516 counter_u64_free(ifp->if_counters[i]);
522 * Deregister an interface and free the associated storage.
525 if_free(struct ifnet *ifp)
528 ifp->if_flags |= IFF_DYING; /* XXX: Locking */
530 CURVNET_SET_QUIET(ifp->if_vnet);
532 KASSERT(ifp == ifnet_byindex_locked(ifp->if_index),
533 ("%s: freeing unallocated ifnet", ifp->if_xname));
535 ifindex_free_locked(ifp->if_index);
538 if (refcount_release(&ifp->if_refcount))
539 if_free_internal(ifp);
544 * Interfaces to keep an ifnet type-stable despite the possibility of the
545 * driver calling if_free(). If there are additional references, we defer
546 * freeing the underlying data structure.
549 if_ref(struct ifnet *ifp)
552 /* We don't assert the ifnet list lock here, but arguably should. */
553 refcount_acquire(&ifp->if_refcount);
557 if_rele(struct ifnet *ifp)
560 if (!refcount_release(&ifp->if_refcount))
562 if_free_internal(ifp);
566 ifq_init(struct ifaltq *ifq, struct ifnet *ifp)
569 mtx_init(&ifq->ifq_mtx, ifp->if_xname, "if send queue", MTX_DEF);
571 if (ifq->ifq_maxlen == 0)
572 ifq->ifq_maxlen = ifqmaxlen;
575 ifq->altq_disc = NULL;
576 ifq->altq_flags &= ALTQF_CANTCHANGE;
577 ifq->altq_tbr = NULL;
582 ifq_delete(struct ifaltq *ifq)
584 mtx_destroy(&ifq->ifq_mtx);
588 * Perform generic interface initialization tasks and attach the interface
589 * to the list of "active" interfaces. If vmove flag is set on entry
590 * to if_attach_internal(), perform only a limited subset of initialization
591 * tasks, given that we are moving from one vnet to another an ifnet which
592 * has already been fully initialized.
594 * Note that if_detach_internal() removes group membership unconditionally
595 * even when vmove flag is set, and if_attach_internal() adds only IFG_ALL.
596 * Thus, when if_vmove() is applied to a cloned interface, group membership
597 * is lost while a cloned one always joins a group whose name is
598 * ifc->ifc_name. To recover this after if_detach_internal() and
599 * if_attach_internal(), the cloner should be specified to
600 * if_attach_internal() via ifc. If it is non-NULL, if_attach_internal()
601 * attempts to join a group whose name is ifc->ifc_name.
604 * - The decision to return void and thus require this function to
605 * succeed is questionable.
606 * - We should probably do more sanity checking. For instance we don't
607 * do anything to insure if_xname is unique or non-empty.
610 if_attach(struct ifnet *ifp)
613 if_attach_internal(ifp, 0, NULL);
617 * Compute the least common TSO limit.
620 if_hw_tsomax_common(if_t ifp, struct ifnet_hw_tsomax *pmax)
623 * 1) If there is no limit currently, take the limit from
624 * the network adapter.
626 * 2) If the network adapter has a limit below the current
629 if (pmax->tsomaxbytes == 0 || (ifp->if_hw_tsomax != 0 &&
630 ifp->if_hw_tsomax < pmax->tsomaxbytes)) {
631 pmax->tsomaxbytes = ifp->if_hw_tsomax;
633 if (pmax->tsomaxsegcount == 0 || (ifp->if_hw_tsomaxsegcount != 0 &&
634 ifp->if_hw_tsomaxsegcount < pmax->tsomaxsegcount)) {
635 pmax->tsomaxsegcount = ifp->if_hw_tsomaxsegcount;
637 if (pmax->tsomaxsegsize == 0 || (ifp->if_hw_tsomaxsegsize != 0 &&
638 ifp->if_hw_tsomaxsegsize < pmax->tsomaxsegsize)) {
639 pmax->tsomaxsegsize = ifp->if_hw_tsomaxsegsize;
644 * Update TSO limit of a network adapter.
646 * Returns zero if no change. Else non-zero.
649 if_hw_tsomax_update(if_t ifp, struct ifnet_hw_tsomax *pmax)
652 if (ifp->if_hw_tsomax != pmax->tsomaxbytes) {
653 ifp->if_hw_tsomax = pmax->tsomaxbytes;
656 if (ifp->if_hw_tsomaxsegsize != pmax->tsomaxsegsize) {
657 ifp->if_hw_tsomaxsegsize = pmax->tsomaxsegsize;
660 if (ifp->if_hw_tsomaxsegcount != pmax->tsomaxsegcount) {
661 ifp->if_hw_tsomaxsegcount = pmax->tsomaxsegcount;
668 if_attach_internal(struct ifnet *ifp, int vmove, struct if_clone *ifc)
670 unsigned socksize, ifasize;
671 int namelen, masklen;
672 struct sockaddr_dl *sdl;
675 if (ifp->if_index == 0 || ifp != ifnet_byindex(ifp->if_index))
676 panic ("%s: BUG: if_attach called without if_alloc'd input()\n",
680 ifp->if_vnet = curvnet;
681 if (ifp->if_home_vnet == NULL)
682 ifp->if_home_vnet = curvnet;
685 if_addgroup(ifp, IFG_ALL);
687 /* Restore group membership for cloned interfaces. */
688 if (vmove && ifc != NULL)
689 if_clone_addgroup(ifp, ifc);
691 getmicrotime(&ifp->if_lastchange);
692 ifp->if_epoch = time_uptime;
694 KASSERT((ifp->if_transmit == NULL && ifp->if_qflush == NULL) ||
695 (ifp->if_transmit != NULL && ifp->if_qflush != NULL),
696 ("transmit and qflush must both either be set or both be NULL"));
697 if (ifp->if_transmit == NULL) {
698 ifp->if_transmit = if_transmit;
699 ifp->if_qflush = if_qflush;
701 if (ifp->if_input == NULL)
702 ifp->if_input = if_input_default;
704 if (ifp->if_requestencap == NULL)
705 ifp->if_requestencap = if_requestencap_default;
709 mac_ifnet_create(ifp);
713 * Create a Link Level name for this device.
715 namelen = strlen(ifp->if_xname);
717 * Always save enough space for any possiable name so we
718 * can do a rename in place later.
720 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + IFNAMSIZ;
721 socksize = masklen + ifp->if_addrlen;
722 if (socksize < sizeof(*sdl))
723 socksize = sizeof(*sdl);
724 socksize = roundup2(socksize, sizeof(long));
725 ifasize = sizeof(*ifa) + 2 * socksize;
726 ifa = ifa_alloc(ifasize, M_WAITOK);
727 sdl = (struct sockaddr_dl *)(ifa + 1);
728 sdl->sdl_len = socksize;
729 sdl->sdl_family = AF_LINK;
730 bcopy(ifp->if_xname, sdl->sdl_data, namelen);
731 sdl->sdl_nlen = namelen;
732 sdl->sdl_index = ifp->if_index;
733 sdl->sdl_type = ifp->if_type;
736 ifa->ifa_rtrequest = link_rtrequest;
737 ifa->ifa_addr = (struct sockaddr *)sdl;
738 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
739 ifa->ifa_netmask = (struct sockaddr *)sdl;
740 sdl->sdl_len = masklen;
742 sdl->sdl_data[--namelen] = 0xff;
743 TAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link);
744 /* Reliably crash if used uninitialized. */
745 ifp->if_broadcastaddr = NULL;
747 if (ifp->if_type == IFT_ETHER) {
748 ifp->if_hw_addr = malloc(ifp->if_addrlen, M_IFADDR,
752 #if defined(INET) || defined(INET6)
753 /* Use defaults for TSO, if nothing is set */
754 if (ifp->if_hw_tsomax == 0 &&
755 ifp->if_hw_tsomaxsegcount == 0 &&
756 ifp->if_hw_tsomaxsegsize == 0) {
758 * The TSO defaults needs to be such that an
759 * NFS mbuf list of 35 mbufs totalling just
760 * below 64K works and that a chain of mbufs
761 * can be defragged into at most 32 segments:
763 ifp->if_hw_tsomax = min(IP_MAXPACKET, (32 * MCLBYTES) -
764 (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN));
765 ifp->if_hw_tsomaxsegcount = 35;
766 ifp->if_hw_tsomaxsegsize = 2048; /* 2K */
768 /* XXX some drivers set IFCAP_TSO after ethernet attach */
769 if (ifp->if_capabilities & IFCAP_TSO) {
770 if_printf(ifp, "Using defaults for TSO: %u/%u/%u\n",
772 ifp->if_hw_tsomaxsegcount,
773 ifp->if_hw_tsomaxsegsize);
781 * Update the interface index in the link layer address
784 for (ifa = ifp->if_addr; ifa != NULL;
785 ifa = TAILQ_NEXT(ifa, ifa_link)) {
786 if (ifa->ifa_addr->sa_family == AF_LINK) {
787 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
788 sdl->sdl_index = ifp->if_index;
795 TAILQ_INSERT_TAIL(&V_ifnet, ifp, if_link);
797 curvnet->vnet_ifcnt++;
801 if (domain_init_status >= 2)
802 if_attachdomain1(ifp);
804 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
805 if (IS_DEFAULT_VNET(curvnet))
806 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL);
808 /* Announce the interface. */
809 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
813 if_attachdomain(void *dummy)
817 TAILQ_FOREACH(ifp, &V_ifnet, if_link)
818 if_attachdomain1(ifp);
820 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_SECOND,
821 if_attachdomain, NULL);
824 if_attachdomain1(struct ifnet *ifp)
829 * Since dp->dom_ifattach calls malloc() with M_WAITOK, we
830 * cannot lock ifp->if_afdata initialization, entirely.
833 if (ifp->if_afdata_initialized >= domain_init_status) {
834 IF_AFDATA_UNLOCK(ifp);
835 log(LOG_WARNING, "%s called more than once on %s\n",
836 __func__, ifp->if_xname);
839 ifp->if_afdata_initialized = domain_init_status;
840 IF_AFDATA_UNLOCK(ifp);
842 /* address family dependent data region */
843 bzero(ifp->if_afdata, sizeof(ifp->if_afdata));
844 for (dp = domains; dp; dp = dp->dom_next) {
845 if (dp->dom_ifattach)
846 ifp->if_afdata[dp->dom_family] =
847 (*dp->dom_ifattach)(ifp);
852 * Remove any unicast or broadcast network addresses from an interface.
855 if_purgeaddrs(struct ifnet *ifp)
857 struct ifaddr *ifa, *next;
859 /* XXX cannot hold IF_ADDR_WLOCK over called functions. */
860 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) {
861 if (ifa->ifa_addr->sa_family == AF_LINK)
864 /* XXX: Ugly!! ad hoc just for INET */
865 if (ifa->ifa_addr->sa_family == AF_INET) {
866 struct ifaliasreq ifr;
868 bzero(&ifr, sizeof(ifr));
869 ifr.ifra_addr = *ifa->ifa_addr;
870 if (ifa->ifa_dstaddr)
871 ifr.ifra_broadaddr = *ifa->ifa_dstaddr;
872 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp,
878 if (ifa->ifa_addr->sa_family == AF_INET6) {
880 /* ifp_addrhead is already updated */
885 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
886 IF_ADDR_WUNLOCK(ifp);
892 * Remove any multicast network addresses from an interface when an ifnet
896 if_purgemaddrs(struct ifnet *ifp)
898 struct ifmultiaddr *ifma;
899 struct ifmultiaddr *next;
902 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next)
903 if_delmulti_locked(ifp, ifma, 1);
904 IF_ADDR_WUNLOCK(ifp);
908 * Detach an interface, removing it from the list of "active" interfaces.
909 * If vmove flag is set on entry to if_detach_internal(), perform only a
910 * limited subset of cleanup tasks, given that we are moving an ifnet from
911 * one vnet to another, where it must be fully operational.
913 * XXXRW: There are some significant questions about event ordering, and
914 * how to prevent things from starting to use the interface during detach.
917 if_detach(struct ifnet *ifp)
920 CURVNET_SET_QUIET(ifp->if_vnet);
921 if_detach_internal(ifp, 0, NULL);
926 * The vmove flag, if set, indicates that we are called from a callpath
927 * that is moving an interface to a different vnet instance.
929 * The shutdown flag, if set, indicates that we are called in the
930 * process of shutting down a vnet instance. Currently only the
931 * vnet_if_return SYSUNINIT function sets it. Note: we can be called
932 * on a vnet instance shutdown without this flag being set, e.g., when
933 * the cloned interfaces are destoyed as first thing of teardown.
936 if_detach_internal(struct ifnet *ifp, int vmove, struct if_clone **ifcp)
946 shutdown = (ifp->if_vnet->vnet_state > SI_SUB_VNET &&
947 ifp->if_vnet->vnet_state < SI_SUB_VNET_DONE) ? 1 : 0;
950 TAILQ_FOREACH(iter, &V_ifnet, if_link)
952 TAILQ_REMOVE(&V_ifnet, ifp, if_link);
959 * While we would want to panic here, we cannot
960 * guarantee that the interface is indeed still on
961 * the list given we don't hold locks all the way.
966 panic("%s: ifp=%p not on the ifnet tailq %p",
967 __func__, ifp, &V_ifnet);
969 return; /* XXX this should panic as well? */
974 * At this point we know the interface still was on the ifnet list
975 * and we removed it so we are in a stable state.
978 curvnet->vnet_ifcnt--;
982 * In any case (destroy or vmove) detach us from the groups
983 * and remove/wait for pending events on the taskq.
984 * XXX-BZ in theory an interface could still enqueue a taskq change?
988 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
991 * Check if this is a cloned interface or not. Must do even if
992 * shutting down as a if_vmove_reclaim() would move the ifp and
993 * the if_clone_addgroup() will have a corrupted string overwise
994 * from a gibberish pointer.
996 if (vmove && ifcp != NULL)
997 *ifcp = if_clone_findifc(ifp);
1003 * On VNET shutdown abort here as the stack teardown will do all
1004 * the work top-down for us.
1008 * In case of a vmove we are done here without error.
1009 * If we would signal an error it would lead to the same
1010 * abort as if we did not find the ifnet anymore.
1011 * if_detach() calls us in void context and does not care
1012 * about an early abort notification, so life is splendid :)
1014 goto finish_vnet_shutdown;
1019 * At this point we are not tearing down a VNET and are either
1020 * going to destroy or vmove the interface and have to cleanup
1025 * Remove routes and flush queues.
1028 if (ALTQ_IS_ENABLED(&ifp->if_snd))
1029 altq_disable(&ifp->if_snd);
1030 if (ALTQ_IS_ATTACHED(&ifp->if_snd))
1031 altq_detach(&ifp->if_snd);
1042 * Remove all IPv6 kernel structs related to ifp. This should be done
1043 * before removing routing entries below, since IPv6 interface direct
1044 * routes are expected to be removed by the IPv6-specific kernel API.
1045 * Otherwise, the kernel will detect some inconsistency and bark it.
1049 if_purgemaddrs(ifp);
1051 /* Announce that the interface is gone. */
1052 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
1053 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
1054 if (IS_DEFAULT_VNET(curvnet))
1055 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL);
1059 * Prevent further calls into the device driver via ifnet.
1064 * Remove link ifaddr pointer and maybe decrement if_index.
1065 * Clean up all addresses.
1067 free(ifp->if_hw_addr, M_IFADDR);
1068 ifp->if_hw_addr = NULL;
1069 ifp->if_addr = NULL;
1071 /* We can now free link ifaddr. */
1073 if (!TAILQ_EMPTY(&ifp->if_addrhead)) {
1074 ifa = TAILQ_FIRST(&ifp->if_addrhead);
1075 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
1076 IF_ADDR_WUNLOCK(ifp);
1079 IF_ADDR_WUNLOCK(ifp);
1082 rt_flushifroutes(ifp);
1085 finish_vnet_shutdown:
1088 * We cannot hold the lock over dom_ifdetach calls as they might
1089 * sleep, for example trying to drain a callout, thus open up the
1090 * theoretical race with re-attaching.
1092 IF_AFDATA_LOCK(ifp);
1093 i = ifp->if_afdata_initialized;
1094 ifp->if_afdata_initialized = 0;
1095 IF_AFDATA_UNLOCK(ifp);
1096 for (dp = domains; i > 0 && dp; dp = dp->dom_next) {
1097 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) {
1098 (*dp->dom_ifdetach)(ifp,
1099 ifp->if_afdata[dp->dom_family]);
1100 ifp->if_afdata[dp->dom_family] = NULL;
1109 * if_vmove() performs a limited version of if_detach() in current
1110 * vnet and if_attach()es the ifnet to the vnet specified as 2nd arg.
1111 * An attempt is made to shrink if_index in current vnet, find an
1112 * unused if_index in target vnet and calls if_grow() if necessary,
1113 * and finally find an unused if_xname for the target vnet.
1116 if_vmove(struct ifnet *ifp, struct vnet *new_vnet)
1118 struct if_clone *ifc;
1119 u_int bif_dlt, bif_hdrlen;
1123 * if_detach_internal() will call the eventhandler to notify
1124 * interface departure. That will detach if_bpf. We need to
1125 * safe the dlt and hdrlen so we can re-attach it later.
1127 bpf_get_bp_params(ifp->if_bpf, &bif_dlt, &bif_hdrlen);
1130 * Detach from current vnet, but preserve LLADDR info, do not
1131 * mark as dead etc. so that the ifnet can be reattached later.
1132 * If we cannot find it, we lost the race to someone else.
1134 rc = if_detach_internal(ifp, 1, &ifc);
1139 * Unlink the ifnet from ifindex_table[] in current vnet, and shrink
1140 * the if_index for that vnet if possible.
1142 * NOTE: IFNET_WLOCK/IFNET_WUNLOCK() are assumed to be unvirtualized,
1143 * or we'd lock on one vnet and unlock on another.
1146 ifindex_free_locked(ifp->if_index);
1150 * Perform interface-specific reassignment tasks, if provided by
1153 if (ifp->if_reassign != NULL)
1154 ifp->if_reassign(ifp, new_vnet, NULL);
1157 * Switch to the context of the target vnet.
1159 CURVNET_SET_QUIET(new_vnet);
1162 ifp->if_index = ifindex_alloc();
1163 ifnet_setbyindex_locked(ifp->if_index, ifp);
1166 if_attach_internal(ifp, 1, ifc);
1168 if (ifp->if_bpf == NULL)
1169 bpfattach(ifp, bif_dlt, bif_hdrlen);
1175 * Move an ifnet to or from another child prison/vnet, specified by the jail id.
1178 if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid)
1184 /* Try to find the prison within our visibility. */
1185 sx_slock(&allprison_lock);
1186 pr = prison_find_child(td->td_ucred->cr_prison, jid);
1187 sx_sunlock(&allprison_lock);
1190 prison_hold_locked(pr);
1191 mtx_unlock(&pr->pr_mtx);
1193 /* Do not try to move the iface from and to the same prison. */
1194 if (pr->pr_vnet == ifp->if_vnet) {
1199 /* Make sure the named iface does not exists in the dst. prison/vnet. */
1200 /* XXX Lock interfaces to avoid races. */
1201 CURVNET_SET_QUIET(pr->pr_vnet);
1202 difp = ifunit(ifname);
1209 /* Make sure the VNET is stable. */
1210 shutdown = (ifp->if_vnet->vnet_state > SI_SUB_VNET &&
1211 ifp->if_vnet->vnet_state < SI_SUB_VNET_DONE) ? 1 : 0;
1219 /* Move the interface into the child jail/vnet. */
1220 if_vmove(ifp, pr->pr_vnet);
1222 /* Report the new if_xname back to the userland. */
1223 sprintf(ifname, "%s", ifp->if_xname);
1230 if_vmove_reclaim(struct thread *td, char *ifname, int jid)
1233 struct vnet *vnet_dst;
1237 /* Try to find the prison within our visibility. */
1238 sx_slock(&allprison_lock);
1239 pr = prison_find_child(td->td_ucred->cr_prison, jid);
1240 sx_sunlock(&allprison_lock);
1243 prison_hold_locked(pr);
1244 mtx_unlock(&pr->pr_mtx);
1246 /* Make sure the named iface exists in the source prison/vnet. */
1247 CURVNET_SET(pr->pr_vnet);
1248 ifp = ifunit(ifname); /* XXX Lock to avoid races. */
1255 /* Do not try to move the iface from and to the same prison. */
1256 vnet_dst = TD_TO_VNET(td);
1257 if (vnet_dst == ifp->if_vnet) {
1263 /* Make sure the VNET is stable. */
1264 shutdown = (ifp->if_vnet->vnet_state > SI_SUB_VNET &&
1265 ifp->if_vnet->vnet_state < SI_SUB_VNET_DONE) ? 1 : 0;
1272 /* Get interface back from child jail/vnet. */
1273 if_vmove(ifp, vnet_dst);
1276 /* Report the new if_xname back to the userland. */
1277 sprintf(ifname, "%s", ifp->if_xname);
1285 * Add a group to an interface
1288 if_addgroup(struct ifnet *ifp, const char *groupname)
1290 struct ifg_list *ifgl;
1291 struct ifg_group *ifg = NULL;
1292 struct ifg_member *ifgm;
1295 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' &&
1296 groupname[strlen(groupname) - 1] <= '9')
1300 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1301 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) {
1306 if ((ifgl = (struct ifg_list *)malloc(sizeof(struct ifg_list), M_TEMP,
1307 M_NOWAIT)) == NULL) {
1312 if ((ifgm = (struct ifg_member *)malloc(sizeof(struct ifg_member),
1313 M_TEMP, M_NOWAIT)) == NULL) {
1319 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
1320 if (!strcmp(ifg->ifg_group, groupname))
1324 if ((ifg = (struct ifg_group *)malloc(sizeof(struct ifg_group),
1325 M_TEMP, M_NOWAIT)) == NULL) {
1331 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group));
1332 ifg->ifg_refcnt = 0;
1333 TAILQ_INIT(&ifg->ifg_members);
1334 TAILQ_INSERT_TAIL(&V_ifg_head, ifg, ifg_next);
1339 ifgl->ifgl_group = ifg;
1340 ifgm->ifgm_ifp = ifp;
1343 TAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next);
1344 TAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next);
1345 IF_ADDR_WUNLOCK(ifp);
1350 EVENTHANDLER_INVOKE(group_attach_event, ifg);
1351 EVENTHANDLER_INVOKE(group_change_event, groupname);
1357 * Remove a group from an interface
1360 if_delgroup(struct ifnet *ifp, const char *groupname)
1362 struct ifg_list *ifgl;
1363 struct ifg_member *ifgm;
1366 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1367 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname))
1375 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next);
1376 IF_ADDR_WUNLOCK(ifp);
1378 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next)
1379 if (ifgm->ifgm_ifp == ifp)
1383 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifgm_next);
1387 if (--ifgl->ifgl_group->ifg_refcnt == 0) {
1388 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next);
1390 EVENTHANDLER_INVOKE(group_detach_event, ifgl->ifgl_group);
1391 free(ifgl->ifgl_group, M_TEMP);
1397 EVENTHANDLER_INVOKE(group_change_event, groupname);
1403 * Remove an interface from all groups
1406 if_delgroups(struct ifnet *ifp)
1408 struct ifg_list *ifgl;
1409 struct ifg_member *ifgm;
1410 char groupname[IFNAMSIZ];
1413 while (!TAILQ_EMPTY(&ifp->if_groups)) {
1414 ifgl = TAILQ_FIRST(&ifp->if_groups);
1416 strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ);
1419 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next);
1420 IF_ADDR_WUNLOCK(ifp);
1422 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next)
1423 if (ifgm->ifgm_ifp == ifp)
1427 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm,
1432 if (--ifgl->ifgl_group->ifg_refcnt == 0) {
1433 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next);
1435 EVENTHANDLER_INVOKE(group_detach_event,
1437 free(ifgl->ifgl_group, M_TEMP);
1443 EVENTHANDLER_INVOKE(group_change_event, groupname);
1451 * Stores all groups from an interface in memory pointed
1455 if_getgroup(struct ifgroupreq *data, struct ifnet *ifp)
1458 struct ifg_list *ifgl;
1459 struct ifg_req ifgrq, *ifgp;
1460 struct ifgroupreq *ifgr = data;
1462 if (ifgr->ifgr_len == 0) {
1464 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1465 ifgr->ifgr_len += sizeof(struct ifg_req);
1466 IF_ADDR_RUNLOCK(ifp);
1470 len = ifgr->ifgr_len;
1471 ifgp = ifgr->ifgr_groups;
1474 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) {
1475 if (len < sizeof(ifgrq)) {
1476 IF_ADDR_RUNLOCK(ifp);
1479 bzero(&ifgrq, sizeof ifgrq);
1480 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group,
1481 sizeof(ifgrq.ifgrq_group));
1482 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) {
1483 IF_ADDR_RUNLOCK(ifp);
1486 len -= sizeof(ifgrq);
1489 IF_ADDR_RUNLOCK(ifp);
1495 * Stores all members of a group in memory pointed to by data
1498 if_getgroupmembers(struct ifgroupreq *data)
1500 struct ifgroupreq *ifgr = data;
1501 struct ifg_group *ifg;
1502 struct ifg_member *ifgm;
1503 struct ifg_req ifgrq, *ifgp;
1507 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
1508 if (!strcmp(ifg->ifg_group, ifgr->ifgr_name))
1515 if (ifgr->ifgr_len == 0) {
1516 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next)
1517 ifgr->ifgr_len += sizeof(ifgrq);
1522 len = ifgr->ifgr_len;
1523 ifgp = ifgr->ifgr_groups;
1524 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) {
1525 if (len < sizeof(ifgrq)) {
1529 bzero(&ifgrq, sizeof ifgrq);
1530 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname,
1531 sizeof(ifgrq.ifgrq_member));
1532 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) {
1536 len -= sizeof(ifgrq);
1545 * Return counter values from counter(9)s stored in ifnet.
1548 if_get_counter_default(struct ifnet *ifp, ift_counter cnt)
1551 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1553 return (counter_u64_fetch(ifp->if_counters[cnt]));
1557 * Increase an ifnet counter. Usually used for counters shared
1558 * between the stack and a driver, but function supports them all.
1561 if_inc_counter(struct ifnet *ifp, ift_counter cnt, int64_t inc)
1564 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1566 counter_u64_add(ifp->if_counters[cnt], inc);
1570 * Copy data from ifnet to userland API structure if_data.
1573 if_data_copy(struct ifnet *ifp, struct if_data *ifd)
1576 ifd->ifi_type = ifp->if_type;
1577 ifd->ifi_physical = 0;
1578 ifd->ifi_addrlen = ifp->if_addrlen;
1579 ifd->ifi_hdrlen = ifp->if_hdrlen;
1580 ifd->ifi_link_state = ifp->if_link_state;
1582 ifd->ifi_datalen = sizeof(struct if_data);
1583 ifd->ifi_mtu = ifp->if_mtu;
1584 ifd->ifi_metric = ifp->if_metric;
1585 ifd->ifi_baudrate = ifp->if_baudrate;
1586 ifd->ifi_hwassist = ifp->if_hwassist;
1587 ifd->ifi_epoch = ifp->if_epoch;
1588 ifd->ifi_lastchange = ifp->if_lastchange;
1590 ifd->ifi_ipackets = ifp->if_get_counter(ifp, IFCOUNTER_IPACKETS);
1591 ifd->ifi_ierrors = ifp->if_get_counter(ifp, IFCOUNTER_IERRORS);
1592 ifd->ifi_opackets = ifp->if_get_counter(ifp, IFCOUNTER_OPACKETS);
1593 ifd->ifi_oerrors = ifp->if_get_counter(ifp, IFCOUNTER_OERRORS);
1594 ifd->ifi_collisions = ifp->if_get_counter(ifp, IFCOUNTER_COLLISIONS);
1595 ifd->ifi_ibytes = ifp->if_get_counter(ifp, IFCOUNTER_IBYTES);
1596 ifd->ifi_obytes = ifp->if_get_counter(ifp, IFCOUNTER_OBYTES);
1597 ifd->ifi_imcasts = ifp->if_get_counter(ifp, IFCOUNTER_IMCASTS);
1598 ifd->ifi_omcasts = ifp->if_get_counter(ifp, IFCOUNTER_OMCASTS);
1599 ifd->ifi_iqdrops = ifp->if_get_counter(ifp, IFCOUNTER_IQDROPS);
1600 ifd->ifi_oqdrops = ifp->if_get_counter(ifp, IFCOUNTER_OQDROPS);
1601 ifd->ifi_noproto = ifp->if_get_counter(ifp, IFCOUNTER_NOPROTO);
1605 * Wrapper functions for struct ifnet address list locking macros. These are
1606 * used by kernel modules to avoid encoding programming interface or binary
1607 * interface assumptions that may be violated when kernel-internal locking
1608 * approaches change.
1611 if_addr_rlock(struct ifnet *ifp)
1618 if_addr_runlock(struct ifnet *ifp)
1621 IF_ADDR_RUNLOCK(ifp);
1625 if_maddr_rlock(if_t ifp)
1628 IF_ADDR_RLOCK((struct ifnet *)ifp);
1632 if_maddr_runlock(if_t ifp)
1635 IF_ADDR_RUNLOCK((struct ifnet *)ifp);
1639 * Initialization, destruction and refcounting functions for ifaddrs.
1642 ifa_alloc(size_t size, int flags)
1646 KASSERT(size >= sizeof(struct ifaddr),
1647 ("%s: invalid size %zu", __func__, size));
1649 ifa = malloc(size, M_IFADDR, M_ZERO | flags);
1653 if ((ifa->ifa_opackets = counter_u64_alloc(flags)) == NULL)
1655 if ((ifa->ifa_ipackets = counter_u64_alloc(flags)) == NULL)
1657 if ((ifa->ifa_obytes = counter_u64_alloc(flags)) == NULL)
1659 if ((ifa->ifa_ibytes = counter_u64_alloc(flags)) == NULL)
1662 refcount_init(&ifa->ifa_refcnt, 1);
1667 /* free(NULL) is okay */
1668 counter_u64_free(ifa->ifa_opackets);
1669 counter_u64_free(ifa->ifa_ipackets);
1670 counter_u64_free(ifa->ifa_obytes);
1671 counter_u64_free(ifa->ifa_ibytes);
1672 free(ifa, M_IFADDR);
1678 ifa_ref(struct ifaddr *ifa)
1681 refcount_acquire(&ifa->ifa_refcnt);
1685 ifa_free(struct ifaddr *ifa)
1688 if (refcount_release(&ifa->ifa_refcnt)) {
1689 counter_u64_free(ifa->ifa_opackets);
1690 counter_u64_free(ifa->ifa_ipackets);
1691 counter_u64_free(ifa->ifa_obytes);
1692 counter_u64_free(ifa->ifa_ibytes);
1693 free(ifa, M_IFADDR);
1698 ifa_maintain_loopback_route(int cmd, const char *otype, struct ifaddr *ifa,
1699 struct sockaddr *ia)
1702 struct rt_addrinfo info;
1703 struct sockaddr_dl null_sdl;
1708 bzero(&info, sizeof(info));
1709 if (cmd != RTM_DELETE)
1710 info.rti_ifp = V_loif;
1711 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC;
1712 info.rti_info[RTAX_DST] = ia;
1713 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl;
1714 link_init_sdl(ifp, (struct sockaddr *)&null_sdl, ifp->if_type);
1716 error = rtrequest1_fib(cmd, &info, NULL, ifp->if_fib);
1719 log(LOG_DEBUG, "%s: %s failed for interface %s: %u\n",
1720 __func__, otype, if_name(ifp), error);
1726 ifa_add_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1729 return (ifa_maintain_loopback_route(RTM_ADD, "insertion", ifa, ia));
1733 ifa_del_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1736 return (ifa_maintain_loopback_route(RTM_DELETE, "deletion", ifa, ia));
1740 ifa_switch_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1743 return (ifa_maintain_loopback_route(RTM_CHANGE, "switch", ifa, ia));
1747 * XXX: Because sockaddr_dl has deeper structure than the sockaddr
1748 * structs used to represent other address families, it is necessary
1749 * to perform a different comparison.
1752 #define sa_dl_equal(a1, a2) \
1753 ((((const struct sockaddr_dl *)(a1))->sdl_len == \
1754 ((const struct sockaddr_dl *)(a2))->sdl_len) && \
1755 (bcmp(CLLADDR((const struct sockaddr_dl *)(a1)), \
1756 CLLADDR((const struct sockaddr_dl *)(a2)), \
1757 ((const struct sockaddr_dl *)(a1))->sdl_alen) == 0))
1760 * Locate an interface based on a complete address.
1763 static struct ifaddr *
1764 ifa_ifwithaddr_internal(const struct sockaddr *addr, int getref)
1769 IFNET_RLOCK_NOSLEEP();
1770 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1772 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1773 if (ifa->ifa_addr->sa_family != addr->sa_family)
1775 if (sa_equal(addr, ifa->ifa_addr)) {
1778 IF_ADDR_RUNLOCK(ifp);
1781 /* IP6 doesn't have broadcast */
1782 if ((ifp->if_flags & IFF_BROADCAST) &&
1783 ifa->ifa_broadaddr &&
1784 ifa->ifa_broadaddr->sa_len != 0 &&
1785 sa_equal(ifa->ifa_broadaddr, addr)) {
1788 IF_ADDR_RUNLOCK(ifp);
1792 IF_ADDR_RUNLOCK(ifp);
1796 IFNET_RUNLOCK_NOSLEEP();
1801 ifa_ifwithaddr(const struct sockaddr *addr)
1804 return (ifa_ifwithaddr_internal(addr, 1));
1808 ifa_ifwithaddr_check(const struct sockaddr *addr)
1811 return (ifa_ifwithaddr_internal(addr, 0) != NULL);
1815 * Locate an interface based on the broadcast address.
1819 ifa_ifwithbroadaddr(const struct sockaddr *addr, int fibnum)
1824 IFNET_RLOCK_NOSLEEP();
1825 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1826 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1829 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1830 if (ifa->ifa_addr->sa_family != addr->sa_family)
1832 if ((ifp->if_flags & IFF_BROADCAST) &&
1833 ifa->ifa_broadaddr &&
1834 ifa->ifa_broadaddr->sa_len != 0 &&
1835 sa_equal(ifa->ifa_broadaddr, addr)) {
1837 IF_ADDR_RUNLOCK(ifp);
1841 IF_ADDR_RUNLOCK(ifp);
1845 IFNET_RUNLOCK_NOSLEEP();
1850 * Locate the point to point interface with a given destination address.
1854 ifa_ifwithdstaddr(const struct sockaddr *addr, int fibnum)
1859 IFNET_RLOCK_NOSLEEP();
1860 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1861 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
1863 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1866 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1867 if (ifa->ifa_addr->sa_family != addr->sa_family)
1869 if (ifa->ifa_dstaddr != NULL &&
1870 sa_equal(addr, ifa->ifa_dstaddr)) {
1872 IF_ADDR_RUNLOCK(ifp);
1876 IF_ADDR_RUNLOCK(ifp);
1880 IFNET_RUNLOCK_NOSLEEP();
1885 * Find an interface on a specific network. If many, choice
1886 * is most specific found.
1889 ifa_ifwithnet(const struct sockaddr *addr, int ignore_ptp, int fibnum)
1893 struct ifaddr *ifa_maybe = NULL;
1894 u_int af = addr->sa_family;
1895 const char *addr_data = addr->sa_data, *cplim;
1898 * AF_LINK addresses can be looked up directly by their index number,
1899 * so do that if we can.
1901 if (af == AF_LINK) {
1902 const struct sockaddr_dl *sdl = (const struct sockaddr_dl *)addr;
1903 if (sdl->sdl_index && sdl->sdl_index <= V_if_index)
1904 return (ifaddr_byindex(sdl->sdl_index));
1908 * Scan though each interface, looking for ones that have addresses
1909 * in this address family and the requested fib. Maintain a reference
1910 * on ifa_maybe once we find one, as we release the IF_ADDR_RLOCK() that
1911 * kept it stable when we move onto the next interface.
1913 IFNET_RLOCK_NOSLEEP();
1914 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1915 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1918 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1919 const char *cp, *cp2, *cp3;
1921 if (ifa->ifa_addr->sa_family != af)
1923 if (af == AF_INET &&
1924 ifp->if_flags & IFF_POINTOPOINT && !ignore_ptp) {
1926 * This is a bit broken as it doesn't
1927 * take into account that the remote end may
1928 * be a single node in the network we are
1930 * The trouble is that we don't know the
1931 * netmask for the remote end.
1933 if (ifa->ifa_dstaddr != NULL &&
1934 sa_equal(addr, ifa->ifa_dstaddr)) {
1936 IF_ADDR_RUNLOCK(ifp);
1941 * Scan all the bits in the ifa's address.
1942 * If a bit dissagrees with what we are
1943 * looking for, mask it with the netmask
1944 * to see if it really matters.
1945 * (A byte at a time)
1947 if (ifa->ifa_netmask == 0)
1950 cp2 = ifa->ifa_addr->sa_data;
1951 cp3 = ifa->ifa_netmask->sa_data;
1952 cplim = ifa->ifa_netmask->sa_len
1953 + (char *)ifa->ifa_netmask;
1955 if ((*cp++ ^ *cp2++) & *cp3++)
1956 goto next; /* next address! */
1958 * If the netmask of what we just found
1959 * is more specific than what we had before
1960 * (if we had one), or if the virtual status
1961 * of new prefix is better than of the old one,
1962 * then remember the new one before continuing
1963 * to search for an even better one.
1965 if (ifa_maybe == NULL ||
1966 ifa_preferred(ifa_maybe, ifa) ||
1967 rn_refines((caddr_t)ifa->ifa_netmask,
1968 (caddr_t)ifa_maybe->ifa_netmask)) {
1969 if (ifa_maybe != NULL)
1970 ifa_free(ifa_maybe);
1976 IF_ADDR_RUNLOCK(ifp);
1981 IFNET_RUNLOCK_NOSLEEP();
1982 if (ifa_maybe != NULL)
1983 ifa_free(ifa_maybe);
1988 * Find an interface address specific to an interface best matching
1992 ifaof_ifpforaddr(const struct sockaddr *addr, struct ifnet *ifp)
1995 const char *cp, *cp2, *cp3;
1997 struct ifaddr *ifa_maybe = NULL;
1998 u_int af = addr->sa_family;
2003 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2004 if (ifa->ifa_addr->sa_family != af)
2006 if (ifa_maybe == NULL)
2008 if (ifa->ifa_netmask == 0) {
2009 if (sa_equal(addr, ifa->ifa_addr) ||
2010 (ifa->ifa_dstaddr &&
2011 sa_equal(addr, ifa->ifa_dstaddr)))
2015 if (ifp->if_flags & IFF_POINTOPOINT) {
2016 if (sa_equal(addr, ifa->ifa_dstaddr))
2020 cp2 = ifa->ifa_addr->sa_data;
2021 cp3 = ifa->ifa_netmask->sa_data;
2022 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
2023 for (; cp3 < cplim; cp3++)
2024 if ((*cp++ ^ *cp2++) & *cp3)
2034 IF_ADDR_RUNLOCK(ifp);
2039 * See whether new ifa is better than current one:
2040 * 1) A non-virtual one is preferred over virtual.
2041 * 2) A virtual in master state preferred over any other state.
2043 * Used in several address selecting functions.
2046 ifa_preferred(struct ifaddr *cur, struct ifaddr *next)
2049 return (cur->ifa_carp && (!next->ifa_carp ||
2050 ((*carp_master_p)(next) && !(*carp_master_p)(cur))));
2053 #include <net/if_llatbl.h>
2056 * Default action when installing a route with a Link Level gateway.
2057 * Lookup an appropriate real ifa to point to.
2058 * This should be moved to /sys/net/link.c eventually.
2061 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info)
2063 struct ifaddr *ifa, *oifa;
2064 struct sockaddr *dst;
2067 if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == NULL) ||
2068 ((ifp = ifa->ifa_ifp) == NULL) || ((dst = rt_key(rt)) == NULL))
2070 ifa = ifaof_ifpforaddr(dst, ifp);
2075 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest)
2076 ifa->ifa_rtrequest(cmd, rt, info);
2080 struct sockaddr_dl *
2081 link_alloc_sdl(size_t size, int flags)
2084 return (malloc(size, M_TEMP, flags));
2088 link_free_sdl(struct sockaddr *sa)
2094 * Fills in given sdl with interface basic info.
2095 * Returns pointer to filled sdl.
2097 struct sockaddr_dl *
2098 link_init_sdl(struct ifnet *ifp, struct sockaddr *paddr, u_char iftype)
2100 struct sockaddr_dl *sdl;
2102 sdl = (struct sockaddr_dl *)paddr;
2103 memset(sdl, 0, sizeof(struct sockaddr_dl));
2104 sdl->sdl_len = sizeof(struct sockaddr_dl);
2105 sdl->sdl_family = AF_LINK;
2106 sdl->sdl_index = ifp->if_index;
2107 sdl->sdl_type = iftype;
2113 * Mark an interface down and notify protocols of
2117 if_unroute(struct ifnet *ifp, int flag, int fam)
2121 KASSERT(flag == IFF_UP, ("if_unroute: flag != IFF_UP"));
2123 ifp->if_flags &= ~flag;
2124 getmicrotime(&ifp->if_lastchange);
2125 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
2126 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
2127 pfctlinput(PRC_IFDOWN, ifa->ifa_addr);
2128 ifp->if_qflush(ifp);
2131 (*carp_linkstate_p)(ifp);
2136 * Mark an interface up and notify protocols of
2140 if_route(struct ifnet *ifp, int flag, int fam)
2144 KASSERT(flag == IFF_UP, ("if_route: flag != IFF_UP"));
2146 ifp->if_flags |= flag;
2147 getmicrotime(&ifp->if_lastchange);
2148 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
2149 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
2150 pfctlinput(PRC_IFUP, ifa->ifa_addr);
2152 (*carp_linkstate_p)(ifp);
2159 void (*vlan_link_state_p)(struct ifnet *); /* XXX: private from if_vlan */
2160 void (*vlan_trunk_cap_p)(struct ifnet *); /* XXX: private from if_vlan */
2161 struct ifnet *(*vlan_trunkdev_p)(struct ifnet *);
2162 struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t);
2163 int (*vlan_tag_p)(struct ifnet *, uint16_t *);
2164 int (*vlan_setcookie_p)(struct ifnet *, void *);
2165 void *(*vlan_cookie_p)(struct ifnet *);
2168 * Handle a change in the interface link state. To avoid LORs
2169 * between driver lock and upper layer locks, as well as possible
2170 * recursions, we post event to taskqueue, and all job
2171 * is done in static do_link_state_change().
2174 if_link_state_change(struct ifnet *ifp, int link_state)
2176 /* Return if state hasn't changed. */
2177 if (ifp->if_link_state == link_state)
2180 ifp->if_link_state = link_state;
2182 taskqueue_enqueue(taskqueue_swi, &ifp->if_linktask);
2186 do_link_state_change(void *arg, int pending)
2188 struct ifnet *ifp = (struct ifnet *)arg;
2189 int link_state = ifp->if_link_state;
2190 CURVNET_SET(ifp->if_vnet);
2192 /* Notify that the link state has changed. */
2194 if (ifp->if_vlantrunk != NULL)
2195 (*vlan_link_state_p)(ifp);
2197 if ((ifp->if_type == IFT_ETHER || ifp->if_type == IFT_L2VLAN) &&
2198 ifp->if_l2com != NULL)
2199 (*ng_ether_link_state_p)(ifp, link_state);
2201 (*carp_linkstate_p)(ifp);
2203 (*bridge_linkstate_p)(ifp);
2205 (*lagg_linkstate_p)(ifp, link_state);
2207 if (IS_DEFAULT_VNET(curvnet))
2208 devctl_notify("IFNET", ifp->if_xname,
2209 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN",
2212 if_printf(ifp, "%d link states coalesced\n", pending);
2213 if (log_link_state_change)
2214 log(LOG_NOTICE, "%s: link state changed to %s\n", ifp->if_xname,
2215 (link_state == LINK_STATE_UP) ? "UP" : "DOWN" );
2216 EVENTHANDLER_INVOKE(ifnet_link_event, ifp, link_state);
2221 * Mark an interface down and notify protocols of
2225 if_down(struct ifnet *ifp)
2228 EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_DOWN);
2229 if_unroute(ifp, IFF_UP, AF_UNSPEC);
2233 * Mark an interface up and notify protocols of
2237 if_up(struct ifnet *ifp)
2240 if_route(ifp, IFF_UP, AF_UNSPEC);
2241 EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_UP);
2245 * Flush an interface queue.
2248 if_qflush(struct ifnet *ifp)
2256 if (ALTQ_IS_ENABLED(ifq))
2260 while ((m = n) != NULL) {
2271 * Map interface name to interface structure pointer, with or without
2272 * returning a reference.
2275 ifunit_ref(const char *name)
2279 IFNET_RLOCK_NOSLEEP();
2280 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2281 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0 &&
2282 !(ifp->if_flags & IFF_DYING))
2287 IFNET_RUNLOCK_NOSLEEP();
2292 ifunit(const char *name)
2296 IFNET_RLOCK_NOSLEEP();
2297 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2298 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0)
2301 IFNET_RUNLOCK_NOSLEEP();
2306 * Hardware specific interface ioctls.
2309 ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td)
2312 int error = 0, do_ifup = 0;
2313 int new_flags, temp_flags;
2314 size_t namelen, onamelen;
2316 char *descrbuf, *odescrbuf;
2317 char new_name[IFNAMSIZ];
2319 struct sockaddr_dl *sdl;
2321 ifr = (struct ifreq *)data;
2324 ifr->ifr_index = ifp->if_index;
2328 temp_flags = ifp->if_flags | ifp->if_drv_flags;
2329 ifr->ifr_flags = temp_flags & 0xffff;
2330 ifr->ifr_flagshigh = temp_flags >> 16;
2334 ifr->ifr_reqcap = ifp->if_capabilities;
2335 ifr->ifr_curcap = ifp->if_capenable;
2340 error = mac_ifnet_ioctl_get(td->td_ucred, ifr, ifp);
2345 ifr->ifr_metric = ifp->if_metric;
2349 ifr->ifr_mtu = ifp->if_mtu;
2353 /* XXXGL: did this ever worked? */
2359 sx_slock(&ifdescr_sx);
2360 if (ifp->if_description == NULL)
2363 /* space for terminating nul */
2364 descrlen = strlen(ifp->if_description) + 1;
2365 if (ifr->ifr_buffer.length < descrlen)
2366 ifr->ifr_buffer.buffer = NULL;
2368 error = copyout(ifp->if_description,
2369 ifr->ifr_buffer.buffer, descrlen);
2370 ifr->ifr_buffer.length = descrlen;
2372 sx_sunlock(&ifdescr_sx);
2376 error = priv_check(td, PRIV_NET_SETIFDESCR);
2381 * Copy only (length-1) bytes to make sure that
2382 * if_description is always nul terminated. The
2383 * length parameter is supposed to count the
2384 * terminating nul in.
2386 if (ifr->ifr_buffer.length > ifdescr_maxlen)
2387 return (ENAMETOOLONG);
2388 else if (ifr->ifr_buffer.length == 0)
2391 descrbuf = malloc(ifr->ifr_buffer.length, M_IFDESCR,
2393 error = copyin(ifr->ifr_buffer.buffer, descrbuf,
2394 ifr->ifr_buffer.length - 1);
2396 free(descrbuf, M_IFDESCR);
2401 sx_xlock(&ifdescr_sx);
2402 odescrbuf = ifp->if_description;
2403 ifp->if_description = descrbuf;
2404 sx_xunlock(&ifdescr_sx);
2406 getmicrotime(&ifp->if_lastchange);
2407 free(odescrbuf, M_IFDESCR);
2411 ifr->ifr_fib = ifp->if_fib;
2415 error = priv_check(td, PRIV_NET_SETIFFIB);
2418 if (ifr->ifr_fib >= rt_numfibs)
2421 ifp->if_fib = ifr->ifr_fib;
2425 error = priv_check(td, PRIV_NET_SETIFFLAGS);
2429 * Currently, no driver owned flags pass the IFF_CANTCHANGE
2430 * check, so we don't need special handling here yet.
2432 new_flags = (ifr->ifr_flags & 0xffff) |
2433 (ifr->ifr_flagshigh << 16);
2434 if (ifp->if_flags & IFF_UP &&
2435 (new_flags & IFF_UP) == 0) {
2437 } else if (new_flags & IFF_UP &&
2438 (ifp->if_flags & IFF_UP) == 0) {
2441 /* See if permanently promiscuous mode bit is about to flip */
2442 if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) {
2443 if (new_flags & IFF_PPROMISC)
2444 ifp->if_flags |= IFF_PROMISC;
2445 else if (ifp->if_pcount == 0)
2446 ifp->if_flags &= ~IFF_PROMISC;
2447 if (log_promisc_mode_change)
2448 log(LOG_INFO, "%s: permanently promiscuous mode %s\n",
2450 ((new_flags & IFF_PPROMISC) ?
2451 "enabled" : "disabled"));
2453 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
2454 (new_flags &~ IFF_CANTCHANGE);
2455 if (ifp->if_ioctl) {
2456 (void) (*ifp->if_ioctl)(ifp, cmd, data);
2460 getmicrotime(&ifp->if_lastchange);
2464 error = priv_check(td, PRIV_NET_SETIFCAP);
2467 if (ifp->if_ioctl == NULL)
2468 return (EOPNOTSUPP);
2469 if (ifr->ifr_reqcap & ~ifp->if_capabilities)
2471 error = (*ifp->if_ioctl)(ifp, cmd, data);
2473 getmicrotime(&ifp->if_lastchange);
2478 error = mac_ifnet_ioctl_set(td->td_ucred, ifr, ifp);
2483 error = priv_check(td, PRIV_NET_SETIFNAME);
2486 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL);
2489 if (new_name[0] == '\0')
2491 if (new_name[IFNAMSIZ-1] != '\0') {
2492 new_name[IFNAMSIZ-1] = '\0';
2493 if (strlen(new_name) == IFNAMSIZ-1)
2496 if (ifunit(new_name) != NULL)
2500 * XXX: Locking. Nothing else seems to lock if_flags,
2501 * and there are numerous other races with the
2502 * ifunit() checks not being atomic with namespace
2503 * changes (renames, vmoves, if_attach, etc).
2505 ifp->if_flags |= IFF_RENAMING;
2507 /* Announce the departure of the interface. */
2508 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
2509 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
2511 log(LOG_INFO, "%s: changing name to '%s'\n",
2512 ifp->if_xname, new_name);
2515 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname));
2517 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
2518 namelen = strlen(new_name);
2519 onamelen = sdl->sdl_nlen;
2521 * Move the address if needed. This is safe because we
2522 * allocate space for a name of length IFNAMSIZ when we
2523 * create this in if_attach().
2525 if (namelen != onamelen) {
2526 bcopy(sdl->sdl_data + onamelen,
2527 sdl->sdl_data + namelen, sdl->sdl_alen);
2529 bcopy(new_name, sdl->sdl_data, namelen);
2530 sdl->sdl_nlen = namelen;
2531 sdl = (struct sockaddr_dl *)ifa->ifa_netmask;
2532 bzero(sdl->sdl_data, onamelen);
2533 while (namelen != 0)
2534 sdl->sdl_data[--namelen] = 0xff;
2535 IF_ADDR_WUNLOCK(ifp);
2537 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
2538 /* Announce the return of the interface. */
2539 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
2541 ifp->if_flags &= ~IFF_RENAMING;
2546 error = priv_check(td, PRIV_NET_SETIFVNET);
2549 error = if_vmove_loan(td, ifp, ifr->ifr_name, ifr->ifr_jid);
2554 error = priv_check(td, PRIV_NET_SETIFMETRIC);
2557 ifp->if_metric = ifr->ifr_metric;
2558 getmicrotime(&ifp->if_lastchange);
2562 error = priv_check(td, PRIV_NET_SETIFPHYS);
2565 if (ifp->if_ioctl == NULL)
2566 return (EOPNOTSUPP);
2567 error = (*ifp->if_ioctl)(ifp, cmd, data);
2569 getmicrotime(&ifp->if_lastchange);
2574 u_long oldmtu = ifp->if_mtu;
2576 error = priv_check(td, PRIV_NET_SETIFMTU);
2579 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU)
2581 if (ifp->if_ioctl == NULL)
2582 return (EOPNOTSUPP);
2583 error = (*ifp->if_ioctl)(ifp, cmd, data);
2585 getmicrotime(&ifp->if_lastchange);
2589 * If the link MTU changed, do network layer specific procedure.
2591 if (ifp->if_mtu != oldmtu) {
2602 if (cmd == SIOCADDMULTI)
2603 error = priv_check(td, PRIV_NET_ADDMULTI);
2605 error = priv_check(td, PRIV_NET_DELMULTI);
2609 /* Don't allow group membership on non-multicast interfaces. */
2610 if ((ifp->if_flags & IFF_MULTICAST) == 0)
2611 return (EOPNOTSUPP);
2613 /* Don't let users screw up protocols' entries. */
2614 if (ifr->ifr_addr.sa_family != AF_LINK)
2617 if (cmd == SIOCADDMULTI) {
2618 struct ifmultiaddr *ifma;
2621 * Userland is only permitted to join groups once
2622 * via the if_addmulti() KPI, because it cannot hold
2623 * struct ifmultiaddr * between calls. It may also
2624 * lose a race while we check if the membership
2628 ifma = if_findmulti(ifp, &ifr->ifr_addr);
2629 IF_ADDR_RUNLOCK(ifp);
2633 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma);
2635 error = if_delmulti(ifp, &ifr->ifr_addr);
2638 getmicrotime(&ifp->if_lastchange);
2641 case SIOCSIFPHYADDR:
2642 case SIOCDIFPHYADDR:
2644 case SIOCSIFPHYADDR_IN6:
2647 case SIOCSIFGENERIC:
2648 error = priv_check(td, PRIV_NET_HWIOCTL);
2651 if (ifp->if_ioctl == NULL)
2652 return (EOPNOTSUPP);
2653 error = (*ifp->if_ioctl)(ifp, cmd, data);
2655 getmicrotime(&ifp->if_lastchange);
2659 case SIOCGIFPSRCADDR:
2660 case SIOCGIFPDSTADDR:
2663 case SIOCGIFGENERIC:
2665 case SIOCGIFRSSHASH:
2666 if (ifp->if_ioctl == NULL)
2667 return (EOPNOTSUPP);
2668 error = (*ifp->if_ioctl)(ifp, cmd, data);
2672 error = priv_check(td, PRIV_NET_SETLLADDR);
2675 error = if_setlladdr(ifp,
2676 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len);
2680 error = if_gethwaddr(ifp, ifr);
2685 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr;
2687 error = priv_check(td, PRIV_NET_ADDIFGROUP);
2690 if ((error = if_addgroup(ifp, ifgr->ifgr_group)))
2696 if ((error = if_getgroup((struct ifgroupreq *)ifr, ifp)))
2702 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr;
2704 error = priv_check(td, PRIV_NET_DELIFGROUP);
2707 if ((error = if_delgroup(ifp, ifgr->ifgr_group)))
2719 #ifdef COMPAT_FREEBSD32
2727 #define SIOCGIFCONF32 _IOWR('i', 36, struct ifconf32)
2734 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td)
2744 CURVNET_SET(so->so_vnet);
2746 /* Make sure the VNET is stable. */
2747 shutdown = (so->so_vnet->vnet_state > SI_SUB_VNET &&
2748 so->so_vnet->vnet_state < SI_SUB_VNET_DONE) ? 1 : 0;
2758 error = ifconf(cmd, data);
2762 #ifdef COMPAT_FREEBSD32
2765 struct ifconf32 *ifc32;
2768 ifc32 = (struct ifconf32 *)data;
2769 ifc.ifc_len = ifc32->ifc_len;
2770 ifc.ifc_buf = PTRIN(ifc32->ifc_buf);
2772 error = ifconf(SIOCGIFCONF, (void *)&ifc);
2775 ifc32->ifc_len = ifc.ifc_len;
2780 ifr = (struct ifreq *)data;
2785 error = priv_check(td, PRIV_NET_SETIFVNET);
2787 error = if_vmove_reclaim(td, ifr->ifr_name,
2794 error = priv_check(td, PRIV_NET_IFCREATE);
2796 error = if_clone_create(ifr->ifr_name,
2797 sizeof(ifr->ifr_name),
2798 cmd == SIOCIFCREATE2 ? ifr->ifr_data : NULL);
2802 error = priv_check(td, PRIV_NET_IFDESTROY);
2804 error = if_clone_destroy(ifr->ifr_name);
2808 case SIOCIFGCLONERS:
2809 error = if_clone_list((struct if_clonereq *)data);
2813 error = if_getgroupmembers((struct ifgroupreq *)data);
2816 #if defined(INET) || defined(INET6)
2819 if (carp_ioctl_p == NULL)
2820 error = EPROTONOSUPPORT;
2822 error = (*carp_ioctl_p)(ifr, cmd, td);
2828 ifp = ifunit_ref(ifr->ifr_name);
2834 error = ifhwioctl(cmd, ifp, data, td);
2835 if (error != ENOIOCTL) {
2841 oif_flags = ifp->if_flags;
2842 if (so->so_proto == NULL) {
2845 return (EOPNOTSUPP);
2849 * Pass the request on to the socket control method, and if the
2850 * latter returns EOPNOTSUPP, directly to the interface.
2852 * Make an exception for the legacy SIOCSIF* requests. Drivers
2853 * trust SIOCSIFADDR et al to come from an already privileged
2854 * layer, and do not perform any credentials checks or input
2857 error = ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data,
2859 if (error == EOPNOTSUPP && ifp != NULL && ifp->if_ioctl != NULL &&
2860 cmd != SIOCSIFADDR && cmd != SIOCSIFBRDADDR &&
2861 cmd != SIOCSIFDSTADDR && cmd != SIOCSIFNETMASK)
2862 error = (*ifp->if_ioctl)(ifp, cmd, data);
2864 if ((oif_flags ^ ifp->if_flags) & IFF_UP) {
2866 if (ifp->if_flags & IFF_UP)
2876 * The code common to handling reference counted flags,
2877 * e.g., in ifpromisc() and if_allmulti().
2878 * The "pflag" argument can specify a permanent mode flag to check,
2879 * such as IFF_PPROMISC for promiscuous mode; should be 0 if none.
2881 * Only to be used on stack-owned flags, not driver-owned flags.
2884 if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch)
2888 int oldflags, oldcount;
2890 /* Sanity checks to catch programming errors */
2891 KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0,
2892 ("%s: setting driver-owned flag %d", __func__, flag));
2895 KASSERT(*refcount >= 0,
2896 ("%s: increment negative refcount %d for flag %d",
2897 __func__, *refcount, flag));
2899 KASSERT(*refcount > 0,
2900 ("%s: decrement non-positive refcount %d for flag %d",
2901 __func__, *refcount, flag));
2903 /* In case this mode is permanent, just touch refcount */
2904 if (ifp->if_flags & pflag) {
2905 *refcount += onswitch ? 1 : -1;
2909 /* Save ifnet parameters for if_ioctl() may fail */
2910 oldcount = *refcount;
2911 oldflags = ifp->if_flags;
2914 * See if we aren't the only and touching refcount is enough.
2915 * Actually toggle interface flag if we are the first or last.
2920 ifp->if_flags |= flag;
2924 ifp->if_flags &= ~flag;
2927 /* Call down the driver since we've changed interface flags */
2928 if (ifp->if_ioctl == NULL) {
2932 ifr.ifr_flags = ifp->if_flags & 0xffff;
2933 ifr.ifr_flagshigh = ifp->if_flags >> 16;
2934 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
2937 /* Notify userland that interface flags have changed */
2942 /* Recover after driver error */
2943 *refcount = oldcount;
2944 ifp->if_flags = oldflags;
2949 * Set/clear promiscuous mode on interface ifp based on the truth value
2950 * of pswitch. The calls are reference counted so that only the first
2951 * "on" request actually has an effect, as does the final "off" request.
2952 * Results are undefined if the "off" and "on" requests are not matched.
2955 ifpromisc(struct ifnet *ifp, int pswitch)
2958 int oldflags = ifp->if_flags;
2960 error = if_setflag(ifp, IFF_PROMISC, IFF_PPROMISC,
2961 &ifp->if_pcount, pswitch);
2962 /* If promiscuous mode status has changed, log a message */
2963 if (error == 0 && ((ifp->if_flags ^ oldflags) & IFF_PROMISC) &&
2964 log_promisc_mode_change)
2965 log(LOG_INFO, "%s: promiscuous mode %s\n",
2967 (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled");
2972 * Return interface configuration
2973 * of system. List may be used
2974 * in later ioctl's (above) to get
2975 * other information.
2979 ifconf(u_long cmd, caddr_t data)
2981 struct ifconf *ifc = (struct ifconf *)data;
2986 int error, full = 0, valid_len, max_len;
2988 /* Limit initial buffer size to MAXPHYS to avoid DoS from userspace. */
2989 max_len = MAXPHYS - 1;
2991 /* Prevent hostile input from being able to crash the system */
2992 if (ifc->ifc_len <= 0)
2996 if (ifc->ifc_len <= max_len) {
2997 max_len = ifc->ifc_len;
3000 sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN);
3005 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
3009 * Zero the ifr_name buffer to make sure we don't
3010 * disclose the contents of the stack.
3012 memset(ifr.ifr_name, 0, sizeof(ifr.ifr_name));
3014 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name))
3015 >= sizeof(ifr.ifr_name)) {
3018 return (ENAMETOOLONG);
3023 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
3024 struct sockaddr *sa = ifa->ifa_addr;
3026 if (prison_if(curthread->td_ucred, sa) != 0)
3029 if (sa->sa_len <= sizeof(*sa)) {
3031 sbuf_bcat(sb, &ifr, sizeof(ifr));
3032 max_len += sizeof(ifr);
3035 offsetof(struct ifreq, ifr_addr));
3036 max_len += offsetof(struct ifreq, ifr_addr);
3037 sbuf_bcat(sb, sa, sa->sa_len);
3038 max_len += sa->sa_len;
3041 if (sbuf_error(sb) == 0)
3042 valid_len = sbuf_len(sb);
3044 IF_ADDR_RUNLOCK(ifp);
3046 bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr));
3047 sbuf_bcat(sb, &ifr, sizeof(ifr));
3048 max_len += sizeof(ifr);
3050 if (sbuf_error(sb) == 0)
3051 valid_len = sbuf_len(sb);
3057 * If we didn't allocate enough space (uncommon), try again. If
3058 * we have already allocated as much space as we are allowed,
3059 * return what we've got.
3061 if (valid_len != max_len && !full) {
3066 ifc->ifc_len = valid_len;
3068 error = copyout(sbuf_data(sb), ifc->ifc_req, ifc->ifc_len);
3074 * Just like ifpromisc(), but for all-multicast-reception mode.
3077 if_allmulti(struct ifnet *ifp, int onswitch)
3080 return (if_setflag(ifp, IFF_ALLMULTI, 0, &ifp->if_amcount, onswitch));
3083 struct ifmultiaddr *
3084 if_findmulti(struct ifnet *ifp, const struct sockaddr *sa)
3086 struct ifmultiaddr *ifma;
3088 IF_ADDR_LOCK_ASSERT(ifp);
3090 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
3091 if (sa->sa_family == AF_LINK) {
3092 if (sa_dl_equal(ifma->ifma_addr, sa))
3095 if (sa_equal(ifma->ifma_addr, sa))
3104 * Allocate a new ifmultiaddr and initialize based on passed arguments. We
3105 * make copies of passed sockaddrs. The ifmultiaddr will not be added to
3106 * the ifnet multicast address list here, so the caller must do that and
3107 * other setup work (such as notifying the device driver). The reference
3108 * count is initialized to 1.
3110 static struct ifmultiaddr *
3111 if_allocmulti(struct ifnet *ifp, struct sockaddr *sa, struct sockaddr *llsa,
3114 struct ifmultiaddr *ifma;
3115 struct sockaddr *dupsa;
3117 ifma = malloc(sizeof *ifma, M_IFMADDR, mflags |
3122 dupsa = malloc(sa->sa_len, M_IFMADDR, mflags);
3123 if (dupsa == NULL) {
3124 free(ifma, M_IFMADDR);
3127 bcopy(sa, dupsa, sa->sa_len);
3128 ifma->ifma_addr = dupsa;
3130 ifma->ifma_ifp = ifp;
3131 ifma->ifma_refcount = 1;
3132 ifma->ifma_protospec = NULL;
3135 ifma->ifma_lladdr = NULL;
3139 dupsa = malloc(llsa->sa_len, M_IFMADDR, mflags);
3140 if (dupsa == NULL) {
3141 free(ifma->ifma_addr, M_IFMADDR);
3142 free(ifma, M_IFMADDR);
3145 bcopy(llsa, dupsa, llsa->sa_len);
3146 ifma->ifma_lladdr = dupsa;
3152 * if_freemulti: free ifmultiaddr structure and possibly attached related
3153 * addresses. The caller is responsible for implementing reference
3154 * counting, notifying the driver, handling routing messages, and releasing
3155 * any dependent link layer state.
3158 if_freemulti(struct ifmultiaddr *ifma)
3161 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti: refcount %d",
3162 ifma->ifma_refcount));
3164 if (ifma->ifma_lladdr != NULL)
3165 free(ifma->ifma_lladdr, M_IFMADDR);
3166 free(ifma->ifma_addr, M_IFMADDR);
3167 free(ifma, M_IFMADDR);
3171 * Register an additional multicast address with a network interface.
3173 * - If the address is already present, bump the reference count on the
3174 * address and return.
3175 * - If the address is not link-layer, look up a link layer address.
3176 * - Allocate address structures for one or both addresses, and attach to the
3177 * multicast address list on the interface. If automatically adding a link
3178 * layer address, the protocol address will own a reference to the link
3179 * layer address, to be freed when it is freed.
3180 * - Notify the network device driver of an addition to the multicast address
3183 * 'sa' points to caller-owned memory with the desired multicast address.
3185 * 'retifma' will be used to return a pointer to the resulting multicast
3186 * address reference, if desired.
3189 if_addmulti(struct ifnet *ifp, struct sockaddr *sa,
3190 struct ifmultiaddr **retifma)
3192 struct ifmultiaddr *ifma, *ll_ifma;
3193 struct sockaddr *llsa;
3194 struct sockaddr_dl sdl;
3198 * If the address is already present, return a new reference to it;
3199 * otherwise, allocate storage and set up a new address.
3202 ifma = if_findmulti(ifp, sa);
3204 ifma->ifma_refcount++;
3205 if (retifma != NULL)
3207 IF_ADDR_WUNLOCK(ifp);
3212 * The address isn't already present; resolve the protocol address
3213 * into a link layer address, and then look that up, bump its
3214 * refcount or allocate an ifma for that also.
3215 * Most link layer resolving functions returns address data which
3216 * fits inside default sockaddr_dl structure. However callback
3217 * can allocate another sockaddr structure, in that case we need to
3222 if (ifp->if_resolvemulti != NULL) {
3223 /* Provide called function with buffer size information */
3224 sdl.sdl_len = sizeof(sdl);
3225 llsa = (struct sockaddr *)&sdl;
3226 error = ifp->if_resolvemulti(ifp, &llsa, sa);
3232 * Allocate the new address. Don't hook it up yet, as we may also
3233 * need to allocate a link layer multicast address.
3235 ifma = if_allocmulti(ifp, sa, llsa, M_NOWAIT);
3242 * If a link layer address is found, we'll need to see if it's
3243 * already present in the address list, or allocate is as well.
3244 * When this block finishes, the link layer address will be on the
3248 ll_ifma = if_findmulti(ifp, llsa);
3249 if (ll_ifma == NULL) {
3250 ll_ifma = if_allocmulti(ifp, llsa, NULL, M_NOWAIT);
3251 if (ll_ifma == NULL) {
3252 --ifma->ifma_refcount;
3257 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ll_ifma,
3260 ll_ifma->ifma_refcount++;
3261 ifma->ifma_llifma = ll_ifma;
3265 * We now have a new multicast address, ifma, and possibly a new or
3266 * referenced link layer address. Add the primary address to the
3267 * ifnet address list.
3269 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
3271 if (retifma != NULL)
3275 * Must generate the message while holding the lock so that 'ifma'
3276 * pointer is still valid.
3278 rt_newmaddrmsg(RTM_NEWMADDR, ifma);
3279 IF_ADDR_WUNLOCK(ifp);
3282 * We are certain we have added something, so call down to the
3283 * interface to let them know about it.
3285 if (ifp->if_ioctl != NULL) {
3286 (void) (*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0);
3289 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl))
3290 link_free_sdl(llsa);
3295 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl))
3296 link_free_sdl(llsa);
3299 IF_ADDR_WUNLOCK(ifp);
3304 * Delete a multicast group membership by network-layer group address.
3306 * Returns ENOENT if the entry could not be found. If ifp no longer
3307 * exists, results are undefined. This entry point should only be used
3308 * from subsystems which do appropriate locking to hold ifp for the
3309 * duration of the call.
3310 * Network-layer protocol domains must use if_delmulti_ifma().
3313 if_delmulti(struct ifnet *ifp, struct sockaddr *sa)
3315 struct ifmultiaddr *ifma;
3320 IFNET_RLOCK_NOSLEEP();
3321 TAILQ_FOREACH(oifp, &V_ifnet, if_link)
3326 IFNET_RUNLOCK_NOSLEEP();
3328 KASSERT(ifp != NULL, ("%s: ifnet went away", __func__));
3335 ifma = if_findmulti(ifp, sa);
3337 lastref = if_delmulti_locked(ifp, ifma, 0);
3338 IF_ADDR_WUNLOCK(ifp);
3343 if (lastref && ifp->if_ioctl != NULL) {
3344 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
3351 * Delete all multicast group membership for an interface.
3352 * Should be used to quickly flush all multicast filters.
3355 if_delallmulti(struct ifnet *ifp)
3357 struct ifmultiaddr *ifma;
3358 struct ifmultiaddr *next;
3361 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next)
3362 if_delmulti_locked(ifp, ifma, 0);
3363 IF_ADDR_WUNLOCK(ifp);
3367 * Delete a multicast group membership by group membership pointer.
3368 * Network-layer protocol domains must use this routine.
3370 * It is safe to call this routine if the ifp disappeared.
3373 if_delmulti_ifma(struct ifmultiaddr *ifma)
3378 ifp = ifma->ifma_ifp;
3381 printf("%s: ifma_ifp seems to be detached\n", __func__);
3385 IFNET_RLOCK_NOSLEEP();
3386 TAILQ_FOREACH(oifp, &V_ifnet, if_link)
3390 printf("%s: ifnet %p disappeared\n", __func__, ifp);
3393 IFNET_RUNLOCK_NOSLEEP();
3397 * If and only if the ifnet instance exists: Acquire the address lock.
3402 lastref = if_delmulti_locked(ifp, ifma, 0);
3406 * If and only if the ifnet instance exists:
3407 * Release the address lock.
3408 * If the group was left: update the hardware hash filter.
3410 IF_ADDR_WUNLOCK(ifp);
3411 if (lastref && ifp->if_ioctl != NULL) {
3412 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
3418 * Perform deletion of network-layer and/or link-layer multicast address.
3420 * Return 0 if the reference count was decremented.
3421 * Return 1 if the final reference was released, indicating that the
3422 * hardware hash filter should be reprogrammed.
3425 if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching)
3427 struct ifmultiaddr *ll_ifma;
3429 if (ifp != NULL && ifma->ifma_ifp != NULL) {
3430 KASSERT(ifma->ifma_ifp == ifp,
3431 ("%s: inconsistent ifp %p", __func__, ifp));
3432 IF_ADDR_WLOCK_ASSERT(ifp);
3435 ifp = ifma->ifma_ifp;
3438 * If the ifnet is detaching, null out references to ifnet,
3439 * so that upper protocol layers will notice, and not attempt
3440 * to obtain locks for an ifnet which no longer exists. The
3441 * routing socket announcement must happen before the ifnet
3442 * instance is detached from the system.
3446 printf("%s: detaching ifnet instance %p\n", __func__, ifp);
3449 * ifp may already be nulled out if we are being reentered
3450 * to delete the ll_ifma.
3453 rt_newmaddrmsg(RTM_DELMADDR, ifma);
3454 ifma->ifma_ifp = NULL;
3458 if (--ifma->ifma_refcount > 0)
3462 * If this ifma is a network-layer ifma, a link-layer ifma may
3463 * have been associated with it. Release it first if so.
3465 ll_ifma = ifma->ifma_llifma;
3466 if (ll_ifma != NULL) {
3467 KASSERT(ifma->ifma_lladdr != NULL,
3468 ("%s: llifma w/o lladdr", __func__));
3470 ll_ifma->ifma_ifp = NULL; /* XXX */
3471 if (--ll_ifma->ifma_refcount == 0) {
3473 TAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma,
3476 if_freemulti(ll_ifma);
3481 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link);
3486 * The last reference to this instance of struct ifmultiaddr
3487 * was released; the hardware should be notified of this change.
3493 * Set the link layer address on an interface.
3495 * At this time we only support certain types of interfaces,
3496 * and we don't allow the length of the address to change.
3498 * Set noinline to be dtrace-friendly
3501 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len)
3503 struct sockaddr_dl *sdl;
3510 IF_ADDR_RUNLOCK(ifp);
3514 IF_ADDR_RUNLOCK(ifp);
3515 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
3520 if (len != sdl->sdl_alen) { /* don't allow length to change */
3524 switch (ifp->if_type) {
3532 case IFT_IEEE8023ADLAG:
3533 bcopy(lladdr, LLADDR(sdl), len);
3542 * If the interface is already up, we need
3543 * to re-init it in order to reprogram its
3546 if ((ifp->if_flags & IFF_UP) != 0) {
3547 if (ifp->if_ioctl) {
3548 ifp->if_flags &= ~IFF_UP;
3549 ifr.ifr_flags = ifp->if_flags & 0xffff;
3550 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3551 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3552 ifp->if_flags |= IFF_UP;
3553 ifr.ifr_flags = ifp->if_flags & 0xffff;
3554 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3555 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3558 EVENTHANDLER_INVOKE(iflladdr_event, ifp);
3563 * Compat function for handling basic encapsulation requests.
3564 * Not converted stacks (FDDI, IB, ..) supports traditional
3565 * output model: ARP (and other similar L2 protocols) are handled
3566 * inside output routine, arpresolve/nd6_resolve() returns MAC
3567 * address instead of full prepend.
3569 * This function creates calculated header==MAC for IPv4/IPv6 and
3570 * returns EAFNOSUPPORT (which is then handled in ARP code) for other
3574 if_requestencap_default(struct ifnet *ifp, struct if_encap_req *req)
3577 if (req->rtype != IFENCAP_LL)
3578 return (EOPNOTSUPP);
3580 if (req->bufsize < req->lladdr_len)
3583 switch (req->family) {
3588 return (EAFNOSUPPORT);
3591 /* Copy lladdr to storage as is */
3592 memmove(req->buf, req->lladdr, req->lladdr_len);
3593 req->bufsize = req->lladdr_len;
3594 req->lladdr_off = 0;
3600 * Get the link layer address that was read from the hardware at attach.
3602 * This is only set by Ethernet NICs (IFT_ETHER), but laggX interfaces re-type
3603 * their component interfaces as IFT_IEEE8023ADLAG.
3606 if_gethwaddr(struct ifnet *ifp, struct ifreq *ifr)
3609 if (ifp->if_hw_addr == NULL)
3612 switch (ifp->if_type) {
3614 case IFT_IEEE8023ADLAG:
3615 bcopy(ifp->if_hw_addr, ifr->ifr_addr.sa_data, ifp->if_addrlen);
3623 * The name argument must be a pointer to storage which will last as
3624 * long as the interface does. For physical devices, the result of
3625 * device_get_name(dev) is a good choice and for pseudo-devices a
3626 * static string works well.
3629 if_initname(struct ifnet *ifp, const char *name, int unit)
3631 ifp->if_dname = name;
3632 ifp->if_dunit = unit;
3633 if (unit != IF_DUNIT_NONE)
3634 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit);
3636 strlcpy(ifp->if_xname, name, IFNAMSIZ);
3640 if_printf(struct ifnet *ifp, const char * fmt, ...)
3645 retval = printf("%s: ", ifp->if_xname);
3647 retval += vprintf(fmt, ap);
3653 if_start(struct ifnet *ifp)
3656 (*(ifp)->if_start)(ifp);
3660 * Backwards compatibility interface for drivers
3661 * that have not implemented it
3664 if_transmit(struct ifnet *ifp, struct mbuf *m)
3668 IFQ_HANDOFF(ifp, m, error);
3673 if_input_default(struct ifnet *ifp __unused, struct mbuf *m)
3680 if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust)
3685 if (_IF_QFULL(ifq)) {
3687 if_inc_counter(ifp, IFCOUNTER_OQDROPS, 1);
3692 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len + adjust);
3693 if (m->m_flags & (M_BCAST|M_MCAST))
3694 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1);
3695 active = ifp->if_drv_flags & IFF_DRV_OACTIVE;
3697 _IF_ENQUEUE(ifq, m);
3699 if (ifp != NULL && !active)
3700 (*(ifp)->if_start)(ifp);
3705 if_register_com_alloc(u_char type,
3706 if_com_alloc_t *a, if_com_free_t *f)
3709 KASSERT(if_com_alloc[type] == NULL,
3710 ("if_register_com_alloc: %d already registered", type));
3711 KASSERT(if_com_free[type] == NULL,
3712 ("if_register_com_alloc: %d free already registered", type));
3714 if_com_alloc[type] = a;
3715 if_com_free[type] = f;
3719 if_deregister_com_alloc(u_char type)
3722 KASSERT(if_com_alloc[type] != NULL,
3723 ("if_deregister_com_alloc: %d not registered", type));
3724 KASSERT(if_com_free[type] != NULL,
3725 ("if_deregister_com_alloc: %d free not registered", type));
3726 if_com_alloc[type] = NULL;
3727 if_com_free[type] = NULL;
3730 /* API for driver access to network stack owned ifnet.*/
3732 if_setbaudrate(struct ifnet *ifp, uint64_t baudrate)
3736 oldbrate = ifp->if_baudrate;
3737 ifp->if_baudrate = baudrate;
3742 if_getbaudrate(if_t ifp)
3745 return (((struct ifnet *)ifp)->if_baudrate);
3749 if_setcapabilities(if_t ifp, int capabilities)
3751 ((struct ifnet *)ifp)->if_capabilities = capabilities;
3756 if_setcapabilitiesbit(if_t ifp, int setbit, int clearbit)
3758 ((struct ifnet *)ifp)->if_capabilities |= setbit;
3759 ((struct ifnet *)ifp)->if_capabilities &= ~clearbit;
3765 if_getcapabilities(if_t ifp)
3767 return ((struct ifnet *)ifp)->if_capabilities;
3771 if_setcapenable(if_t ifp, int capabilities)
3773 ((struct ifnet *)ifp)->if_capenable = capabilities;
3778 if_setcapenablebit(if_t ifp, int setcap, int clearcap)
3781 ((struct ifnet *)ifp)->if_capenable |= setcap;
3783 ((struct ifnet *)ifp)->if_capenable &= ~clearcap;
3789 if_getdname(if_t ifp)
3791 return ((struct ifnet *)ifp)->if_dname;
3795 if_togglecapenable(if_t ifp, int togglecap)
3797 ((struct ifnet *)ifp)->if_capenable ^= togglecap;
3802 if_getcapenable(if_t ifp)
3804 return ((struct ifnet *)ifp)->if_capenable;
3808 * This is largely undesirable because it ties ifnet to a device, but does
3809 * provide flexiblity for an embedded product vendor. Should be used with
3810 * the understanding that it violates the interface boundaries, and should be
3811 * a last resort only.
3814 if_setdev(if_t ifp, void *dev)
3820 if_setdrvflagbits(if_t ifp, int set_flags, int clear_flags)
3822 ((struct ifnet *)ifp)->if_drv_flags |= set_flags;
3823 ((struct ifnet *)ifp)->if_drv_flags &= ~clear_flags;
3829 if_getdrvflags(if_t ifp)
3831 return ((struct ifnet *)ifp)->if_drv_flags;
3835 if_setdrvflags(if_t ifp, int flags)
3837 ((struct ifnet *)ifp)->if_drv_flags = flags;
3843 if_setflags(if_t ifp, int flags)
3845 ((struct ifnet *)ifp)->if_flags = flags;
3850 if_setflagbits(if_t ifp, int set, int clear)
3852 ((struct ifnet *)ifp)->if_flags |= set;
3853 ((struct ifnet *)ifp)->if_flags &= ~clear;
3859 if_getflags(if_t ifp)
3861 return ((struct ifnet *)ifp)->if_flags;
3865 if_clearhwassist(if_t ifp)
3867 ((struct ifnet *)ifp)->if_hwassist = 0;
3872 if_sethwassistbits(if_t ifp, int toset, int toclear)
3874 ((struct ifnet *)ifp)->if_hwassist |= toset;
3875 ((struct ifnet *)ifp)->if_hwassist &= ~toclear;
3881 if_sethwassist(if_t ifp, int hwassist_bit)
3883 ((struct ifnet *)ifp)->if_hwassist = hwassist_bit;
3888 if_gethwassist(if_t ifp)
3890 return ((struct ifnet *)ifp)->if_hwassist;
3894 if_setmtu(if_t ifp, int mtu)
3896 ((struct ifnet *)ifp)->if_mtu = mtu;
3903 return ((struct ifnet *)ifp)->if_mtu;
3907 if_getmtu_family(if_t ifp, int family)
3911 for (dp = domains; dp; dp = dp->dom_next) {
3912 if (dp->dom_family == family && dp->dom_ifmtu != NULL)
3913 return (dp->dom_ifmtu((struct ifnet *)ifp));
3916 return (((struct ifnet *)ifp)->if_mtu);
3920 if_setsoftc(if_t ifp, void *softc)
3922 ((struct ifnet *)ifp)->if_softc = softc;
3927 if_getsoftc(if_t ifp)
3929 return ((struct ifnet *)ifp)->if_softc;
3933 if_setrcvif(struct mbuf *m, if_t ifp)
3935 m->m_pkthdr.rcvif = (struct ifnet *)ifp;
3939 if_setvtag(struct mbuf *m, uint16_t tag)
3941 m->m_pkthdr.ether_vtag = tag;
3945 if_getvtag(struct mbuf *m)
3948 return (m->m_pkthdr.ether_vtag);
3952 if_sendq_empty(if_t ifp)
3954 return IFQ_DRV_IS_EMPTY(&((struct ifnet *)ifp)->if_snd);
3958 if_getifaddr(if_t ifp)
3960 return ((struct ifnet *)ifp)->if_addr;
3964 if_getamcount(if_t ifp)
3966 return ((struct ifnet *)ifp)->if_amcount;
3971 if_setsendqready(if_t ifp)
3973 IFQ_SET_READY(&((struct ifnet *)ifp)->if_snd);
3978 if_setsendqlen(if_t ifp, int tx_desc_count)
3980 IFQ_SET_MAXLEN(&((struct ifnet *)ifp)->if_snd, tx_desc_count);
3981 ((struct ifnet *)ifp)->if_snd.ifq_drv_maxlen = tx_desc_count;
3987 if_vlantrunkinuse(if_t ifp)
3989 return ((struct ifnet *)ifp)->if_vlantrunk != NULL?1:0;
3993 if_input(if_t ifp, struct mbuf* sendmp)
3995 (*((struct ifnet *)ifp)->if_input)((struct ifnet *)ifp, sendmp);
4001 #ifndef ETH_ADDR_LEN
4002 #define ETH_ADDR_LEN 6
4006 if_setupmultiaddr(if_t ifp, void *mta, int *cnt, int max)
4008 struct ifmultiaddr *ifma;
4009 uint8_t *lmta = (uint8_t *)mta;
4012 TAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) {
4013 if (ifma->ifma_addr->sa_family != AF_LINK)
4019 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
4020 &lmta[mcnt * ETH_ADDR_LEN], ETH_ADDR_LEN);
4029 if_multiaddr_array(if_t ifp, void *mta, int *cnt, int max)
4033 if_maddr_rlock(ifp);
4034 error = if_setupmultiaddr(ifp, mta, cnt, max);
4035 if_maddr_runlock(ifp);
4040 if_multiaddr_count(if_t ifp, int max)
4042 struct ifmultiaddr *ifma;
4046 if_maddr_rlock(ifp);
4047 TAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) {
4048 if (ifma->ifma_addr->sa_family != AF_LINK)
4054 if_maddr_runlock(ifp);
4059 if_multi_apply(struct ifnet *ifp, int (*filter)(void *, struct ifmultiaddr *, int), void *arg)
4061 struct ifmultiaddr *ifma;
4064 if_maddr_rlock(ifp);
4065 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
4066 cnt += filter(arg, ifma, cnt);
4067 if_maddr_runlock(ifp);
4072 if_dequeue(if_t ifp)
4075 IFQ_DRV_DEQUEUE(&((struct ifnet *)ifp)->if_snd, m);
4081 if_sendq_prepend(if_t ifp, struct mbuf *m)
4083 IFQ_DRV_PREPEND(&((struct ifnet *)ifp)->if_snd, m);
4088 if_setifheaderlen(if_t ifp, int len)
4090 ((struct ifnet *)ifp)->if_hdrlen = len;
4095 if_getlladdr(if_t ifp)
4097 return (IF_LLADDR((struct ifnet *)ifp));
4101 if_gethandle(u_char type)
4103 return (if_alloc(type));
4107 if_bpfmtap(if_t ifh, struct mbuf *m)
4109 struct ifnet *ifp = (struct ifnet *)ifh;
4115 if_etherbpfmtap(if_t ifh, struct mbuf *m)
4117 struct ifnet *ifp = (struct ifnet *)ifh;
4119 ETHER_BPF_MTAP(ifp, m);
4123 if_vlancap(if_t ifh)
4125 struct ifnet *ifp = (struct ifnet *)ifh;
4126 VLAN_CAPABILITIES(ifp);
4130 if_sethwtsomax(if_t ifp, u_int if_hw_tsomax)
4133 ((struct ifnet *)ifp)->if_hw_tsomax = if_hw_tsomax;
4138 if_sethwtsomaxsegcount(if_t ifp, u_int if_hw_tsomaxsegcount)
4141 ((struct ifnet *)ifp)->if_hw_tsomaxsegcount = if_hw_tsomaxsegcount;
4146 if_sethwtsomaxsegsize(if_t ifp, u_int if_hw_tsomaxsegsize)
4149 ((struct ifnet *)ifp)->if_hw_tsomaxsegsize = if_hw_tsomaxsegsize;
4154 if_gethwtsomax(if_t ifp)
4157 return (((struct ifnet *)ifp)->if_hw_tsomax);
4161 if_gethwtsomaxsegcount(if_t ifp)
4164 return (((struct ifnet *)ifp)->if_hw_tsomaxsegcount);
4168 if_gethwtsomaxsegsize(if_t ifp)
4171 return (((struct ifnet *)ifp)->if_hw_tsomaxsegsize);
4175 if_setinitfn(if_t ifp, void (*init_fn)(void *))
4177 ((struct ifnet *)ifp)->if_init = init_fn;
4181 if_setioctlfn(if_t ifp, int (*ioctl_fn)(if_t, u_long, caddr_t))
4183 ((struct ifnet *)ifp)->if_ioctl = (void *)ioctl_fn;
4187 if_setstartfn(if_t ifp, void (*start_fn)(if_t))
4189 ((struct ifnet *)ifp)->if_start = (void *)start_fn;
4193 if_settransmitfn(if_t ifp, if_transmit_fn_t start_fn)
4195 ((struct ifnet *)ifp)->if_transmit = start_fn;
4198 void if_setqflushfn(if_t ifp, if_qflush_fn_t flush_fn)
4200 ((struct ifnet *)ifp)->if_qflush = flush_fn;
4205 if_setgetcounterfn(if_t ifp, if_get_counter_t fn)
4208 ifp->if_get_counter = fn;
4211 /* Revisit these - These are inline functions originally. */
4213 drbr_inuse_drv(if_t ifh, struct buf_ring *br)
4215 return drbr_inuse(ifh, br);
4219 drbr_dequeue_drv(if_t ifh, struct buf_ring *br)
4221 return drbr_dequeue(ifh, br);
4225 drbr_needs_enqueue_drv(if_t ifh, struct buf_ring *br)
4227 return drbr_needs_enqueue(ifh, br);
4231 drbr_enqueue_drv(if_t ifh, struct buf_ring *br, struct mbuf *m)
4233 return drbr_enqueue(ifh, br, m);