4 * Copyright (c) 2001 Berkeley Software Design, Inc.
5 * Copyright (c) 2000, 2001
6 * Bill Paul <wpaul@osd.bsdi.com>. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by Bill Paul.
19 * 4. Neither the name of the author nor the names of any co-contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
27 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
33 * THE POSSIBILITY OF SUCH DAMAGE.
35 * $FreeBSD: src/sys/netgraph/ng_fec.c,v 1.1.2.1 2002/11/01 21:39:31 julian Exp $
36 * $DragonFly: src/sys/netgraph/fec/ng_fec.c,v 1.22 2008/01/05 14:02:39 swildner Exp $
39 * Copyright (c) 1996-1999 Whistle Communications, Inc.
40 * All rights reserved.
42 * Subject to the following obligations and disclaimer of warranty, use and
43 * redistribution of this software, in source or object code forms, with or
44 * without modifications are expressly permitted by Whistle Communications;
45 * provided, however, that:
46 * 1. Any and all reproductions of the source or object code must include the
47 * copyright notice above and the following disclaimer of warranties; and
48 * 2. No rights are granted, in any manner or form, to use Whistle
49 * Communications, Inc. trademarks, including the mark "WHISTLE
50 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as
51 * such appears in the above copyright notice or in the software.
53 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
54 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
55 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
56 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
57 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
58 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
59 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
60 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
61 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
62 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
63 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
64 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
65 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
66 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
67 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
68 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
71 * Author: Archie Cobbs <archie@freebsd.org>
73 * $Whistle: ng_fec.c,v 1.33 1999/11/01 09:24:51 julian Exp $
77 * This module implements ethernet channel bonding using the Cisco
78 * Fast EtherChannel mechanism. Two or four ports may be combined
79 * into a single aggregate interface.
81 * Interfaces are named fec0, fec1, etc. New nodes take the
82 * first available interface name.
84 * This node also includes Berkeley packet filter support.
86 * Note that this node doesn't need to connect to any other
87 * netgraph nodes in order to do its work.
90 #include <sys/param.h>
91 #include <sys/systm.h>
92 #include <sys/errno.h>
93 #include <sys/kernel.h>
94 #include <sys/malloc.h>
96 #include <sys/errno.h>
97 #include <sys/sockio.h>
98 #include <sys/socket.h>
99 #include <sys/syslog.h>
100 #include <sys/libkern.h>
101 #include <sys/queue.h>
102 #include <sys/thread2.h>
105 #include <net/if_types.h>
106 #include <net/if_arp.h>
107 #include <net/if_dl.h>
108 #include <net/if_media.h>
110 #include <net/ethernet.h>
112 #include "opt_inet.h"
113 #include "opt_inet6.h"
115 #include <netinet/in.h>
117 #include <netinet/in_systm.h>
118 #include <netinet/ip.h>
122 #include <netinet/ip6.h>
125 #include <netgraph/ng_message.h>
126 #include <netgraph/netgraph.h>
127 #include <netgraph/ng_parse.h>
130 #define IFP2NG(ifp) ((struct ng_node *)((struct arpcom *)(ifp))->ac_netgraph)
131 #define FEC_INC(x, y) (x) = (x + 1) % y
134 * Current fast etherchannel implementations use either 2 or 4
135 * ports, so for now we limit the maximum bundle size to 4 interfaces.
137 #define FEC_BUNDLESIZ 4
139 struct ng_fec_portlist {
140 struct ifnet *fec_if;
143 struct ether_addr fec_mac;
144 TAILQ_ENTRY(ng_fec_portlist) fec_list;
147 struct ng_fec_bundle {
148 TAILQ_HEAD(,ng_fec_portlist) ng_fec_ports;
153 #define FEC_BTYPE_MAC 0x01
154 #define FEC_BTYPE_INET 0x02
155 #define FEC_BTYPE_INET6 0x03
157 /* Node private data */
158 struct ng_fec_private {
159 struct arpcom arpcom;
160 struct ifmedia ifmedia;
162 int if_error; /* XXX */
163 int unit; /* Interface unit number */
164 node_p node; /* Our netgraph node */
165 struct ng_fec_bundle fec_bundle;/* Aggregate bundle */
166 struct callout fec_timeout; /* callout for ticker */
167 int (*real_if_output)(struct ifnet *, struct mbuf *,
168 struct sockaddr *, struct rtentry *);
170 typedef struct ng_fec_private *priv_p;
172 /* Interface methods */
173 static void ng_fec_input(struct ifnet *, struct mbuf **,
174 const struct ether_header *);
175 static void ng_fec_start(struct ifnet *ifp);
176 static int ng_fec_choose_port(struct ng_fec_bundle *b,
177 struct mbuf *m, struct ifnet **ifp);
178 static int ng_fec_setport(struct ifnet *ifp, u_long cmd, caddr_t data);
179 static void ng_fec_init(void *arg);
180 static void ng_fec_stop(struct ifnet *ifp);
181 static int ng_fec_ifmedia_upd(struct ifnet *ifp);
182 static void ng_fec_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr);
183 static int ng_fec_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data,
185 static int ng_fec_output(struct ifnet *ifp, struct mbuf *m0,
186 struct sockaddr *dst, struct rtentry *rt0);
187 static void ng_fec_tick(void *arg);
188 static int ng_fec_addport(struct ng_fec_private *priv, char *iface);
189 static int ng_fec_delport(struct ng_fec_private *priv, char *iface);
192 static void ng_fec_print_ioctl(struct ifnet *ifp, int cmd, caddr_t data);
195 /* Netgraph methods */
196 static ng_constructor_t ng_fec_constructor;
197 static ng_rcvmsg_t ng_fec_rcvmsg;
198 static ng_shutdown_t ng_fec_rmnode;
200 /* List of commands and how to convert arguments to/from ASCII */
201 static const struct ng_cmdlist ng_fec_cmds[] = {
206 &ng_parse_string_type,
213 &ng_parse_string_type,
218 NGM_FEC_SET_MODE_MAC,
225 NGM_FEC_SET_MODE_INET,
233 /* Node type descriptor */
234 static struct ng_type typestruct = {
249 NETGRAPH_INIT(fec, &typestruct);
251 /* We keep a bitmap indicating which unit numbers are free.
252 One means the unit number is free, zero means it's taken. */
253 static int *ng_fec_units = NULL;
254 static int ng_fec_units_len = 0;
255 static int ng_units_in_use = 0;
257 #define UNITS_BITSPERWORD (sizeof(*ng_fec_units) * NBBY)
260 * Find the first free unit number for a new interface.
261 * Increase the size of the unit bitmap as necessary.
263 static __inline__ int
264 ng_fec_get_unit(int *unit)
268 for (index = 0; index < ng_fec_units_len
269 && ng_fec_units[index] == 0; index++);
270 if (index == ng_fec_units_len) { /* extend array */
271 int i, *newarray, newlen;
273 newlen = (2 * ng_fec_units_len) + 4;
274 MALLOC(newarray, int *, newlen * sizeof(*ng_fec_units),
275 M_NETGRAPH, M_NOWAIT);
276 if (newarray == NULL)
278 bcopy(ng_fec_units, newarray,
279 ng_fec_units_len * sizeof(*ng_fec_units));
280 for (i = ng_fec_units_len; i < newlen; i++)
282 if (ng_fec_units != NULL)
283 FREE(ng_fec_units, M_NETGRAPH);
284 ng_fec_units = newarray;
285 ng_fec_units_len = newlen;
287 bit = ffs(ng_fec_units[index]) - 1;
288 KASSERT(bit >= 0 && bit <= UNITS_BITSPERWORD - 1,
289 ("%s: word=%d bit=%d", __func__, ng_fec_units[index], bit));
290 ng_fec_units[index] &= ~(1 << bit);
291 *unit = (index * UNITS_BITSPERWORD) + bit;
297 * Free a no longer needed unit number.
299 static __inline__ void
300 ng_fec_free_unit(int unit)
304 index = unit / UNITS_BITSPERWORD;
305 bit = unit % UNITS_BITSPERWORD;
306 KASSERT(index < ng_fec_units_len,
307 ("%s: unit=%d len=%d", __func__, unit, ng_fec_units_len));
308 KASSERT((ng_fec_units[index] & (1 << bit)) == 0,
309 ("%s: unit=%d is free", __func__, unit));
310 ng_fec_units[index] |= (1 << bit);
312 * XXX We could think about reducing the size of ng_fec_units[]
313 * XXX here if the last portion is all ones
314 * XXX At least free it if no more units.
315 * Needed if we are eventually be able to unload.
318 if (ng_units_in_use == 0) { /* XXX make SMP safe */
319 FREE(ng_fec_units, M_NETGRAPH);
320 ng_fec_units_len = 0;
325 /************************************************************************
327 ************************************************************************/
330 ng_fec_addport(struct ng_fec_private *priv, char *iface)
332 struct ng_fec_bundle *b;
333 struct ifnet *ifp, *bifp;
335 struct sockaddr_dl *sdl;
336 struct ng_fec_portlist *p, *new;
338 if (priv == NULL || iface == NULL)
341 b = &priv->fec_bundle;
342 ifp = &priv->arpcom.ac_if;
344 /* Find the interface */
345 bifp = ifunit(iface);
347 kprintf("fec%d: tried to add iface %s, which "
348 "doesn't seem to exist\n", priv->unit, iface);
352 /* See if we have room in the bundle */
353 if (b->fec_ifcnt == FEC_BUNDLESIZ) {
354 kprintf("fec%d: can't add new iface; bundle is full\n",
359 /* See if the interface is already in the bundle */
360 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
361 if (p->fec_if == bifp) {
362 kprintf("fec%d: iface %s is already in this "
363 "bundle\n", priv->unit, iface);
368 /* Allocate new list entry. */
369 MALLOC(new, struct ng_fec_portlist *,
370 sizeof(struct ng_fec_portlist), M_NETGRAPH, M_NOWAIT);
374 ac = (struct arpcom *)bifp;
375 ac->ac_netgraph = priv->node;
378 * If this is the first interface added to the bundle,
379 * use its MAC address for the virtual interface (and,
380 * by extension, all the other ports in the bundle).
382 if (b->fec_ifcnt == 0) {
383 sdl = IF_LLSOCKADDR(ifp);
384 bcopy((char *)ac->ac_enaddr,
385 priv->arpcom.ac_enaddr, ETHER_ADDR_LEN);
386 bcopy((char *)ac->ac_enaddr,
387 LLADDR(sdl), ETHER_ADDR_LEN);
390 b->fec_btype = FEC_BTYPE_MAC;
391 new->fec_idx = b->fec_ifcnt;
394 /* Save the real MAC address. */
395 bcopy((char *)ac->ac_enaddr,
396 (char *)&new->fec_mac, ETHER_ADDR_LEN);
398 /* Set up phony MAC address. */
399 sdl = IF_LLSOCKADDR(bifp);
400 bcopy(priv->arpcom.ac_enaddr, ac->ac_enaddr, ETHER_ADDR_LEN);
401 bcopy(priv->arpcom.ac_enaddr, LLADDR(sdl), ETHER_ADDR_LEN);
403 /* Add to the queue */
405 TAILQ_INSERT_TAIL(&b->ng_fec_ports, new, fec_list);
411 ng_fec_delport(struct ng_fec_private *priv, char *iface)
413 struct ng_fec_bundle *b;
414 struct ifnet *ifp, *bifp;
416 struct sockaddr_dl *sdl;
417 struct ng_fec_portlist *p;
419 if (priv == NULL || iface == NULL)
422 b = &priv->fec_bundle;
423 ifp = &priv->arpcom.ac_if;
425 /* Find the interface */
426 bifp = ifunit(iface);
428 kprintf("fec%d: tried to remove iface %s, which "
429 "doesn't seem to exist\n", priv->unit, iface);
433 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
434 if (p->fec_if == bifp)
439 kprintf("fec%d: tried to remove iface %s which "
440 "is not in our bundle\n", priv->unit, iface);
445 bifp->if_flags &= ~IFF_UP;
446 bifp->if_ioctl(bifp, SIOCSIFFLAGS, NULL, NULL);
448 /* Restore MAC address. */
449 ac = (struct arpcom *)bifp;
450 sdl = IF_LLSOCKADDR(bifp);
451 bcopy((char *)&p->fec_mac, ac->ac_enaddr, ETHER_ADDR_LEN);
452 bcopy((char *)&p->fec_mac, LLADDR(sdl), ETHER_ADDR_LEN);
455 TAILQ_REMOVE(&b->ng_fec_ports, p, fec_list);
463 * Pass an ioctl command down to all the underyling interfaces in a
464 * bundle. Used for setting multicast filters and flags.
467 ng_fec_setport(struct ifnet *ifp, u_long command, caddr_t data)
469 struct ng_fec_private *priv;
470 struct ng_fec_bundle *b;
472 struct ng_fec_portlist *p;
474 priv = ifp->if_softc;
475 b = &priv->fec_bundle;
477 lwkt_serialize_exit(ifp->if_serializer); /* XXX */
478 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
481 lwkt_serialize_enter(oifp->if_serializer);
482 oifp->if_ioctl(oifp, command, data, NULL);
483 lwkt_serialize_exit(oifp->if_serializer);
486 lwkt_serialize_enter(ifp->if_serializer);
492 ng_fec_init(void *arg)
494 struct ng_fec_private *priv;
495 struct ng_fec_bundle *b;
496 struct ifnet *ifp, *bifp;
497 struct ng_fec_portlist *p;
500 priv = ifp->if_softc;
501 b = &priv->fec_bundle;
503 if (b->fec_ifcnt == 1 || b->fec_ifcnt == 3) {
504 kprintf("fec%d: invalid bundle "
505 "size: %d\n", priv->unit,
512 lwkt_serialize_exit(ifp->if_serializer); /* XXX */
513 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
515 lwkt_serialize_enter(bifp->if_serializer);
516 bifp->if_flags |= IFF_UP;
517 bifp->if_ioctl(bifp, SIOCSIFFLAGS, NULL, NULL);
518 /* mark iface as up and let the monitor check it */
520 lwkt_serialize_exit(bifp->if_serializer);
522 lwkt_serialize_enter(ifp->if_serializer);
524 callout_reset(&priv->fec_timeout, hz, ng_fec_tick, priv);
528 ng_fec_stop(struct ifnet *ifp)
530 struct ng_fec_private *priv;
531 struct ng_fec_bundle *b;
533 struct ng_fec_portlist *p;
535 priv = ifp->if_softc;
536 b = &priv->fec_bundle;
538 lwkt_serialize_exit(ifp->if_serializer); /* XXX */
539 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
541 lwkt_serialize_enter(bifp->if_serializer);
542 bifp->if_flags &= ~IFF_UP;
543 bifp->if_ioctl(bifp, SIOCSIFFLAGS, NULL, NULL);
544 lwkt_serialize_exit(bifp->if_serializer);
546 callout_stop(&priv->fec_timeout);
547 lwkt_serialize_enter(ifp->if_serializer); /* XXX */
551 ng_fec_tick(void *arg)
553 struct ng_fec_private *priv;
554 struct ng_fec_bundle *b;
555 struct ifmediareq ifmr;
557 struct ng_fec_portlist *p;
561 b = &priv->fec_bundle;
564 * Note: serializer for parent interface not held on entry, and
565 * cannot be held during the loop to avoid a deadlock.
567 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
568 bzero((char *)&ifmr, sizeof(ifmr));
570 lwkt_serialize_enter(ifp->if_serializer);
571 error = ifp->if_ioctl(ifp, SIOCGIFMEDIA, (caddr_t)&ifmr, NULL);
573 kprintf("fec%d: failed to check status "
574 "of link %s\n", priv->unit, ifp->if_xname);
575 lwkt_serialize_exit(ifp->if_serializer);
579 if (ifmr.ifm_status & IFM_AVALID &&
580 IFM_TYPE(ifmr.ifm_active) == IFM_ETHER) {
581 if (ifmr.ifm_status & IFM_ACTIVE) {
582 if (p->fec_ifstat == -1 ||
583 p->fec_ifstat == 0) {
585 kprintf("fec%d: port %s in bundle "
586 "is up\n", priv->unit,
590 if (p->fec_ifstat == -1 ||
591 p->fec_ifstat == 1) {
593 kprintf("fec%d: port %s in bundle "
594 "is down\n", priv->unit,
599 lwkt_serialize_exit(ifp->if_serializer);
602 ifp = &priv->arpcom.ac_if;
603 if (ifp->if_flags & IFF_RUNNING)
604 callout_reset(&priv->fec_timeout, hz, ng_fec_tick, priv);
608 ng_fec_ifmedia_upd(struct ifnet *ifp)
614 ng_fec_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr)
616 struct ng_fec_private *priv;
617 struct ng_fec_bundle *b;
618 struct ng_fec_portlist *p;
620 priv = ifp->if_softc;
621 b = &priv->fec_bundle;
623 ifmr->ifm_status = IFM_AVALID;
624 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
626 ifmr->ifm_status |= IFM_ACTIVE;
633 * Process an ioctl for the virtual interface
636 ng_fec_ioctl(struct ifnet *ifp, u_long command, caddr_t data, struct ucred *cr)
638 struct ifreq *const ifr = (struct ifreq *) data;
640 struct ng_fec_private *priv;
641 struct ng_fec_bundle *b;
643 priv = ifp->if_softc;
644 b = &priv->fec_bundle;
647 ng_fec_print_ioctl(ifp, command, data);
652 /* These two are mostly handled at a higher layer */
656 error = ether_ioctl(ifp, command, data);
662 * If the interface is marked up and stopped, then start it.
663 * If it is marked down and running, then stop it.
665 if (ifr->ifr_flags & IFF_UP) {
666 if (!(ifp->if_flags & IFF_RUNNING)) {
668 if (b->fec_ifcnt == 1 || b->fec_ifcnt == 3) {
669 kprintf("fec%d: invalid bundle "
670 "size: %d\n", priv->unit,
675 ifp->if_flags &= ~(IFF_OACTIVE);
676 ifp->if_flags |= IFF_RUNNING;
680 * Bubble down changes in promisc mode to
681 * underlying interfaces.
683 if ((ifp->if_flags & IFF_PROMISC) !=
684 (priv->if_flags & IFF_PROMISC)) {
685 ng_fec_setport(ifp, command, data);
686 priv->if_flags = ifp->if_flags;
689 if (ifp->if_flags & IFF_RUNNING)
690 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
697 ng_fec_setport(ifp, command, data);
702 error = ifmedia_ioctl(ifp, ifr, &priv->ifmedia, command);
704 /* Stuff that's not supported */
718 * This routine spies on mbufs passing through ether_input(). If
719 * they come from one of the interfaces that are aggregated into
720 * our bundle, we fix up the ifnet pointer and increment our
721 * packet counters so that it looks like the frames are actually
725 ng_fec_input(struct ifnet *ifp, struct mbuf **m0,
726 const struct ether_header *eh)
728 struct ng_node *node;
729 struct ng_fec_private *priv;
730 struct ng_fec_bundle *b;
733 struct ng_fec_portlist *p;
736 if (ifp == NULL || m0 == NULL || eh == NULL)
741 /* Sanity check part II */
745 priv = node->private;
746 b = &priv->fec_bundle;
747 bifp = &priv->arpcom.ac_if;
750 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
751 if (p->fec_if == m->m_pkthdr.rcvif)
755 /* Wasn't meant for us; leave this frame alone. */
759 /* Pretend this is our frame. */
760 m->m_pkthdr.rcvif = bifp;
762 bifp->if_ibytes += m->m_pkthdr.len + sizeof(struct ether_header);
765 bpf_ptap(bifp->if_bpf, m, eh, ETHER_HDR_LEN);
769 * Take a quick peek at the packet and see if it's ok for us to use
770 * the inet or inet6 hash methods on it, if they're enabled. We do
771 * this by setting flags in the mbuf header. Once we've made up our
772 * mind what to do, we pass the frame to ether_output() for further
777 ng_fec_output(struct ifnet *ifp, struct mbuf *m,
778 struct sockaddr *dst, struct rtentry *rt0)
780 const priv_p priv = (priv_p) ifp->if_softc;
781 struct ng_fec_bundle *b;
784 /* Check interface flags */
785 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) {
790 b = &priv->fec_bundle;
792 switch (b->fec_btype) {
794 m->m_flags |= M_FEC_MAC;
799 * We can't use the INET address port selection
800 * scheme if this isn't an INET packet.
802 if (dst->sa_family == AF_INET)
803 m->m_flags |= M_FEC_INET;
805 else if (dst->sa_family == AF_INET6)
806 m->m_flags |= M_FEC_INET6;
810 kprintf("%s: can't do inet aggregation of non "
811 "inet packet\n", ifp->if_xname);
813 m->m_flags |= M_FEC_MAC;
818 kprintf("%s: bogus hash type: %d\n", ifp->if_xname,
826 * Pass the frame to ether_output() for all the protocol
827 * handling. This will put the ethernet header on the packet
831 error = priv->real_if_output(ifp, m, dst, rt0);
832 if (priv->if_error && !error)
833 error = priv->if_error;
839 * Apply a hash to the source and destination addresses in the packet
840 * in order to select an interface. Also check link status and handle
841 * dead links accordingly.
845 ng_fec_choose_port(struct ng_fec_bundle *b,
846 struct mbuf *m, struct ifnet **ifp)
848 struct ether_header *eh;
857 struct ng_fec_portlist *p;
861 * If there are only two ports, mask off all but the
862 * last bit for XORing. If there are 4, mask off all
863 * but the last 2 bits.
865 mask = b->fec_ifcnt == 2 ? 0x1 : 0x3;
866 eh = mtod(m, struct ether_header *);
868 ip = (struct ip *)(mtod(m, char *) +
869 sizeof(struct ether_header));
871 ip6 = (struct ip6_hdr *)(mtod(m, char *) +
872 sizeof(struct ether_header));
877 * The fg_fec_output() routine is supposed to leave a
878 * flag for us in the mbuf that tells us what hash to
879 * use, but sometimes a new mbuf is prepended to the
880 * chain, so we have to search every mbuf in the chain
885 if (m0->m_flags & (M_FEC_MAC|M_FEC_INET|M_FEC_INET6))
892 switch (m0->m_flags & (M_FEC_MAC|M_FEC_INET|M_FEC_INET6)) {
894 port = (eh->ether_dhost[5] ^
895 eh->ether_shost[5]) & mask;
899 port = (ntohl(ip->ip_dst.s_addr) ^
900 ntohl(ip->ip_src.s_addr)) & mask;
904 port = (ip6->ip6_dst.s6_addr[15] ^
905 ip6->ip6_dst.s6_addr[15]) & mask;
914 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
915 if (port == p->fec_idx)
920 * Now that we've chosen a port, make sure it's
921 * alive. If it's not alive, cycle through the bundle
922 * looking for a port that is alive. If we don't find
923 * any, return an error.
925 if (p->fec_ifstat != 1) {
926 struct ng_fec_portlist *n = NULL;
928 n = TAILQ_NEXT(p, fec_list);
930 n = TAILQ_FIRST(&b->ng_fec_ports);
932 if (n->fec_ifstat == 1)
934 n = TAILQ_NEXT(n, fec_list);
936 n = TAILQ_FIRST(&b->ng_fec_ports);
949 * Now that the packet has been run through ether_output(), yank it
950 * off our own send queue and stick it on the queue for the appropriate
951 * underlying physical interface. Note that if the interface's send
952 * queue is full, we save an error status in our private netgraph
953 * space which will eventually be handed up to ng_fec_output(), which
954 * will return it to the rest of the IP stack. We need to do this
955 * in order to duplicate the effect of ether_output() returning ENOBUFS
956 * when it detects that an interface's send queue is full. There's no
957 * other way to signal the error status from here since the if_start()
958 * routine is spec'ed to return void.
960 * Once the frame is queued, we call ether_output_frame() to initiate
964 ng_fec_start(struct ifnet *ifp)
966 struct ng_fec_private *priv;
967 struct ng_fec_bundle *b;
968 struct ifnet *oifp = NULL;
972 priv = ifp->if_softc;
973 b = &priv->fec_bundle;
975 IF_DEQUEUE(&ifp->if_snd, m0);
981 /* Queue up packet on the proper port. */
982 error = ng_fec_choose_port(b, m0, &oifp);
986 priv->if_error = ENOBUFS;
991 lwkt_serialize_exit(ifp->if_serializer);
992 lwkt_serialize_enter(oifp->if_serializer);
993 priv->if_error = ether_output_frame(oifp, m0);
994 lwkt_serialize_exit(oifp->if_serializer);
995 lwkt_serialize_enter(ifp->if_serializer);
1000 * Display an ioctl to the virtual interface
1004 ng_fec_print_ioctl(struct ifnet *ifp, int command, caddr_t data)
1008 switch (command & IOC_DIRMASK) {
1024 log(LOG_DEBUG, "%s: %s('%c', %d, char[%d])\n",
1029 IOCPARM_LEN(command));
1033 /************************************************************************
1035 ************************************************************************/
1038 * Constructor for a node
1041 ng_fec_constructor(node_p *nodep)
1043 char ifname[NG_FEC_FEC_NAME_MAX + 1];
1047 struct ng_fec_bundle *b;
1050 /* Allocate node and interface private structures */
1051 MALLOC(priv, priv_p, sizeof(*priv), M_NETGRAPH, M_NOWAIT | M_ZERO);
1055 ifp = &priv->arpcom.ac_if;
1056 b = &priv->fec_bundle;
1058 /* Link them together */
1059 ifp->if_softc = priv;
1061 /* Get an interface unit number */
1062 if ((error = ng_fec_get_unit(&priv->unit)) != 0) {
1063 FREE(ifp, M_NETGRAPH);
1064 FREE(priv, M_NETGRAPH);
1068 /* Call generic node constructor */
1069 if ((error = ng_make_node_common(&typestruct, nodep)) != 0) {
1070 ng_fec_free_unit(priv->unit);
1071 FREE(ifp, M_NETGRAPH);
1072 FREE(priv, M_NETGRAPH);
1077 /* Link together node and private info */
1078 node->private = priv;
1080 priv->arpcom.ac_netgraph = node;
1082 /* Initialize interface structure */
1083 if_initname(ifp, NG_FEC_FEC_NAME, priv->unit);
1084 ifp->if_start = ng_fec_start;
1085 ifp->if_ioctl = ng_fec_ioctl;
1086 ifp->if_init = ng_fec_init;
1087 ifp->if_watchdog = NULL;
1088 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
1089 ifp->if_mtu = NG_FEC_MTU_DEFAULT;
1090 ifp->if_flags = (IFF_SIMPLEX|IFF_BROADCAST|IFF_MULTICAST);
1091 ifp->if_type = IFT_PROPVIRTUAL; /* XXX */
1092 ifp->if_addrlen = 0; /* XXX */
1093 ifp->if_hdrlen = 0; /* XXX */
1094 ifp->if_baudrate = 100000000; /* XXX */
1095 TAILQ_INIT(&ifp->if_addrhead);
1097 /* Give this node the same name as the interface (if possible) */
1098 bzero(ifname, sizeof(ifname));
1099 strlcpy(ifname, ifp->if_xname, sizeof(ifname));
1100 if (ng_name_node(node, ifname) != 0)
1101 log(LOG_WARNING, "%s: can't acquire netgraph name\n", ifname);
1103 /* Grab hold of the ether_input pipe. */
1104 if (ng_ether_input_p == NULL)
1105 ng_ether_input_p = ng_fec_input;
1107 /* Attach the interface */
1108 ether_ifattach(ifp, priv->arpcom.ac_enaddr, NULL);
1109 priv->real_if_output = ifp->if_output;
1110 ifp->if_output = ng_fec_output;
1111 callout_init(&priv->fec_timeout);
1113 TAILQ_INIT(&b->ng_fec_ports);
1116 ifmedia_init(&priv->ifmedia, 0,
1117 ng_fec_ifmedia_upd, ng_fec_ifmedia_sts);
1118 ifmedia_add(&priv->ifmedia, IFM_ETHER|IFM_NONE, 0, NULL);
1119 ifmedia_set(&priv->ifmedia, IFM_ETHER|IFM_NONE);
1126 * Receive a control message
1129 ng_fec_rcvmsg(node_p node, struct ng_mesg *msg,
1130 const char *retaddr, struct ng_mesg **rptr)
1132 const priv_p priv = node->private;
1133 struct ng_fec_bundle *b;
1134 struct ng_mesg *resp = NULL;
1138 b = &priv->fec_bundle;
1140 switch (msg->header.typecookie) {
1141 case NGM_FEC_COOKIE:
1142 switch (msg->header.cmd) {
1143 case NGM_FEC_ADD_IFACE:
1145 error = ng_fec_addport(priv, ifname);
1147 case NGM_FEC_DEL_IFACE:
1149 error = ng_fec_delport(priv, ifname);
1151 case NGM_FEC_SET_MODE_MAC:
1152 b->fec_btype = FEC_BTYPE_MAC;
1155 case NGM_FEC_SET_MODE_INET:
1156 b->fec_btype = FEC_BTYPE_INET;
1159 case NGM_FEC_SET_MODE_INET6:
1160 b->fec_btype = FEC_BTYPE_INET6;
1176 FREE(resp, M_NETGRAPH);
1177 FREE(msg, M_NETGRAPH);
1182 * Shutdown and remove the node and its associated interface.
1185 ng_fec_rmnode(node_p node)
1187 const priv_p priv = node->private;
1188 struct ng_fec_bundle *b;
1189 struct ng_fec_portlist *p;
1190 char ifname[IFNAMSIZ];
1192 b = &priv->fec_bundle;
1193 ng_fec_stop(&priv->arpcom.ac_if);
1195 while (!TAILQ_EMPTY(&b->ng_fec_ports)) {
1196 p = TAILQ_FIRST(&b->ng_fec_ports);
1197 ksprintf(ifname, "%s",
1198 p->fec_if->if_xname); /* XXX: strings */
1199 ng_fec_delport(priv, ifname);
1204 if (ng_ether_input_p != NULL)
1205 ng_ether_input_p = NULL;
1206 ether_ifdetach(&priv->arpcom.ac_if);
1207 ifmedia_removeall(&priv->ifmedia);
1208 ng_fec_free_unit(priv->unit);
1209 FREE(priv, M_NETGRAPH);
1210 node->private = NULL;