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 $
38 * Copyright (c) 1996-1999 Whistle Communications, Inc.
39 * All rights reserved.
41 * Subject to the following obligations and disclaimer of warranty, use and
42 * redistribution of this software, in source or object code forms, with or
43 * without modifications are expressly permitted by Whistle Communications;
44 * provided, however, that:
45 * 1. Any and all reproductions of the source or object code must include the
46 * copyright notice above and the following disclaimer of warranties; and
47 * 2. No rights are granted, in any manner or form, to use Whistle
48 * Communications, Inc. trademarks, including the mark "WHISTLE
49 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as
50 * such appears in the above copyright notice or in the software.
52 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
53 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
54 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
55 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
56 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
57 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
58 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
59 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
60 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
61 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
62 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
63 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
64 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
65 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
66 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
67 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
70 * Author: Archie Cobbs <archie@freebsd.org>
72 * $Whistle: ng_fec.c,v 1.33 1999/11/01 09:24:51 julian Exp $
76 * This module implements ethernet channel bonding using the Cisco
77 * Fast EtherChannel mechanism. Two or four ports may be combined
78 * into a single aggregate interface.
80 * Interfaces are named fec0, fec1, etc. New nodes take the
81 * first available interface name.
83 * This node also includes Berkeley packet filter support.
85 * Note that this node doesn't need to connect to any other
86 * netgraph nodes in order to do its work.
89 #include <sys/param.h>
90 #include <sys/systm.h>
91 #include <sys/errno.h>
92 #include <sys/kernel.h>
93 #include <sys/malloc.h>
95 #include <sys/errno.h>
96 #include <sys/sockio.h>
97 #include <sys/socket.h>
98 #include <sys/syslog.h>
99 #include <sys/libkern.h>
100 #include <sys/queue.h>
101 #include <sys/thread2.h>
104 #include <net/if_types.h>
105 #include <net/if_arp.h>
106 #include <net/if_dl.h>
107 #include <net/if_media.h>
108 #include <net/ifq_var.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 static void ng_fec_start(struct ifnet *ifp);
175 static int ng_fec_choose_port(struct ng_fec_bundle *b,
176 struct mbuf *m, struct ifnet **ifp);
177 static int ng_fec_setport(struct ifnet *ifp, u_long cmd, caddr_t data);
178 static void ng_fec_init(void *arg);
179 static void ng_fec_stop(struct ifnet *ifp);
180 static int ng_fec_ifmedia_upd(struct ifnet *ifp);
181 static void ng_fec_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr);
182 static int ng_fec_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data,
184 static int ng_fec_output(struct ifnet *ifp, struct mbuf *m0,
185 struct sockaddr *dst, struct rtentry *rt0);
186 static void ng_fec_tick(void *arg);
187 static int ng_fec_addport(struct ng_fec_private *priv, char *iface);
188 static int ng_fec_delport(struct ng_fec_private *priv, char *iface);
191 static void ng_fec_print_ioctl(struct ifnet *ifp, int cmd, caddr_t data);
194 /* Netgraph methods */
195 static ng_constructor_t ng_fec_constructor;
196 static ng_rcvmsg_t ng_fec_rcvmsg;
197 static ng_shutdown_t ng_fec_rmnode;
199 /* List of commands and how to convert arguments to/from ASCII */
200 static const struct ng_cmdlist ng_fec_cmds[] = {
205 &ng_parse_string_type,
212 &ng_parse_string_type,
217 NGM_FEC_SET_MODE_MAC,
224 NGM_FEC_SET_MODE_INET,
232 /* Node type descriptor */
233 static struct ng_type typestruct = {
248 NETGRAPH_INIT(fec, &typestruct);
250 /* We keep a bitmap indicating which unit numbers are free.
251 One means the unit number is free, zero means it's taken. */
252 static int *ng_fec_units = NULL;
253 static int ng_fec_units_len = 0;
254 static int ng_units_in_use = 0;
256 #define UNITS_BITSPERWORD (sizeof(*ng_fec_units) * NBBY)
259 * Find the first free unit number for a new interface.
260 * Increase the size of the unit bitmap as necessary.
262 static __inline__ int
263 ng_fec_get_unit(int *unit)
267 for (index = 0; index < ng_fec_units_len
268 && ng_fec_units[index] == 0; index++);
269 if (index == ng_fec_units_len) { /* extend array */
270 int i, *newarray, newlen;
272 newlen = (2 * ng_fec_units_len) + 4;
273 newarray = kmalloc(newlen * sizeof(*ng_fec_units),
274 M_NETGRAPH, M_NOWAIT);
275 if (newarray == NULL)
277 bcopy(ng_fec_units, newarray,
278 ng_fec_units_len * sizeof(*ng_fec_units));
279 for (i = ng_fec_units_len; i < newlen; i++)
281 if (ng_fec_units != NULL)
282 kfree(ng_fec_units, M_NETGRAPH);
283 ng_fec_units = newarray;
284 ng_fec_units_len = newlen;
286 bit = ffs(ng_fec_units[index]) - 1;
287 KASSERT(bit >= 0 && bit <= UNITS_BITSPERWORD - 1,
288 ("%s: word=%d bit=%d", __func__, ng_fec_units[index], bit));
289 ng_fec_units[index] &= ~(1 << bit);
290 *unit = (index * UNITS_BITSPERWORD) + bit;
296 * Free a no longer needed unit number.
298 static __inline__ void
299 ng_fec_free_unit(int unit)
303 index = unit / UNITS_BITSPERWORD;
304 bit = unit % UNITS_BITSPERWORD;
305 KASSERT(index < ng_fec_units_len,
306 ("%s: unit=%d len=%d", __func__, unit, ng_fec_units_len));
307 KASSERT((ng_fec_units[index] & (1 << bit)) == 0,
308 ("%s: unit=%d is free", __func__, unit));
309 ng_fec_units[index] |= (1 << bit);
311 * XXX We could think about reducing the size of ng_fec_units[]
312 * XXX here if the last portion is all ones
313 * XXX At least free it if no more units.
314 * Needed if we are eventually be able to unload.
317 if (ng_units_in_use == 0) { /* XXX make SMP safe */
318 kfree(ng_fec_units, M_NETGRAPH);
319 ng_fec_units_len = 0;
324 /************************************************************************
326 ************************************************************************/
329 ng_fec_addport(struct ng_fec_private *priv, char *iface)
331 struct ng_fec_bundle *b;
332 struct ifnet *ifp, *bifp;
334 struct sockaddr_dl *sdl;
335 struct ng_fec_portlist *p, *new;
337 if (priv == NULL || iface == NULL)
340 b = &priv->fec_bundle;
341 ifp = &priv->arpcom.ac_if;
343 /* Find the interface */
344 bifp = ifunit(iface);
346 kprintf("fec%d: tried to add iface %s, which "
347 "doesn't seem to exist\n", priv->unit, iface);
351 /* See if we have room in the bundle */
352 if (b->fec_ifcnt == FEC_BUNDLESIZ) {
353 kprintf("fec%d: can't add new iface; bundle is full\n",
358 /* See if the interface is already in the bundle */
359 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
360 if (p->fec_if == bifp) {
361 kprintf("fec%d: iface %s is already in this "
362 "bundle\n", priv->unit, iface);
367 /* Allocate new list entry. */
368 new = kmalloc(sizeof(struct ng_fec_portlist), M_NETGRAPH, M_NOWAIT);
372 ac = (struct arpcom *)bifp;
373 ac->ac_netgraph = priv->node;
376 * If this is the first interface added to the bundle,
377 * use its MAC address for the virtual interface (and,
378 * by extension, all the other ports in the bundle).
380 if (b->fec_ifcnt == 0) {
381 sdl = IF_LLSOCKADDR(ifp);
382 bcopy((char *)ac->ac_enaddr,
383 priv->arpcom.ac_enaddr, ETHER_ADDR_LEN);
384 bcopy((char *)ac->ac_enaddr,
385 LLADDR(sdl), ETHER_ADDR_LEN);
388 b->fec_btype = FEC_BTYPE_MAC;
389 new->fec_idx = b->fec_ifcnt;
392 /* Save the real MAC address. */
393 bcopy((char *)ac->ac_enaddr,
394 (char *)&new->fec_mac, ETHER_ADDR_LEN);
396 /* Set up phony MAC address. */
397 sdl = IF_LLSOCKADDR(bifp);
398 bcopy(priv->arpcom.ac_enaddr, ac->ac_enaddr, ETHER_ADDR_LEN);
399 bcopy(priv->arpcom.ac_enaddr, LLADDR(sdl), ETHER_ADDR_LEN);
401 /* Add to the queue */
403 TAILQ_INSERT_TAIL(&b->ng_fec_ports, new, fec_list);
409 ng_fec_delport(struct ng_fec_private *priv, char *iface)
411 struct ng_fec_bundle *b;
412 struct ifnet *ifp, *bifp;
414 struct sockaddr_dl *sdl;
415 struct ng_fec_portlist *p;
417 if (priv == NULL || iface == NULL)
420 b = &priv->fec_bundle;
421 ifp = &priv->arpcom.ac_if;
423 /* Find the interface */
424 bifp = ifunit(iface);
426 kprintf("fec%d: tried to remove iface %s, which "
427 "doesn't seem to exist\n", priv->unit, iface);
431 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
432 if (p->fec_if == bifp)
437 kprintf("fec%d: tried to remove iface %s which "
438 "is not in our bundle\n", priv->unit, iface);
443 bifp->if_flags &= ~IFF_UP;
444 bifp->if_ioctl(bifp, SIOCSIFFLAGS, NULL, NULL);
446 /* Restore MAC address. */
447 ac = (struct arpcom *)bifp;
448 sdl = IF_LLSOCKADDR(bifp);
449 bcopy((char *)&p->fec_mac, ac->ac_enaddr, ETHER_ADDR_LEN);
450 bcopy((char *)&p->fec_mac, LLADDR(sdl), ETHER_ADDR_LEN);
453 TAILQ_REMOVE(&b->ng_fec_ports, p, fec_list);
454 kfree(p, M_NETGRAPH);
461 * Pass an ioctl command down to all the underyling interfaces in a
462 * bundle. Used for setting multicast filters and flags.
465 ng_fec_setport(struct ifnet *ifp, u_long command, caddr_t data)
467 struct ng_fec_private *priv;
468 struct ng_fec_bundle *b;
470 struct ng_fec_portlist *p;
472 priv = ifp->if_softc;
473 b = &priv->fec_bundle;
475 ifnet_deserialize_all(ifp); /* XXX */
476 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
479 ifnet_serialize_all(oifp);
480 oifp->if_ioctl(oifp, command, data, NULL);
481 ifnet_deserialize_all(oifp);
484 ifnet_serialize_all(ifp);
490 ng_fec_init(void *arg)
492 struct ng_fec_private *priv;
493 struct ng_fec_bundle *b;
494 struct ifnet *ifp, *bifp;
495 struct ng_fec_portlist *p;
498 priv = ifp->if_softc;
499 b = &priv->fec_bundle;
501 if (b->fec_ifcnt == 1 || b->fec_ifcnt == 3) {
502 kprintf("fec%d: invalid bundle "
503 "size: %d\n", priv->unit,
510 ifnet_deserialize_all(ifp); /* XXX */
511 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
513 ifnet_serialize_all(bifp);
514 bifp->if_flags |= IFF_UP;
515 bifp->if_ioctl(bifp, SIOCSIFFLAGS, NULL, NULL);
516 /* mark iface as up and let the monitor check it */
518 ifnet_deserialize_all(bifp);
520 ifnet_serialize_all(ifp);
522 callout_reset(&priv->fec_timeout, hz, ng_fec_tick, priv);
526 ng_fec_stop(struct ifnet *ifp)
528 struct ng_fec_private *priv;
529 struct ng_fec_bundle *b;
531 struct ng_fec_portlist *p;
533 priv = ifp->if_softc;
534 b = &priv->fec_bundle;
536 ifnet_deserialize_all(ifp); /* XXX */
537 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
539 ifnet_serialize_all(bifp);
540 bifp->if_flags &= ~IFF_UP;
541 bifp->if_ioctl(bifp, SIOCSIFFLAGS, NULL, NULL);
542 ifnet_deserialize_all(bifp);
544 ifnet_serialize_all(ifp);
546 callout_stop(&priv->fec_timeout);
550 ng_fec_tick(void *arg)
552 struct ng_fec_private *priv;
553 struct ng_fec_bundle *b;
554 struct ifmediareq ifmr;
556 struct ng_fec_portlist *p;
560 b = &priv->fec_bundle;
563 * Note: serializer for parent interface not held on entry, and
564 * cannot be held during the loop to avoid a deadlock.
566 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
567 bzero((char *)&ifmr, sizeof(ifmr));
569 ifnet_serialize_all(ifp);
570 error = ifp->if_ioctl(ifp, SIOCGIFMEDIA, (caddr_t)&ifmr, NULL);
572 kprintf("fec%d: failed to check status "
573 "of link %s\n", priv->unit, ifp->if_xname);
574 ifnet_deserialize_all(ifp);
578 if (ifmr.ifm_status & IFM_AVALID &&
579 IFM_TYPE(ifmr.ifm_active) == IFM_ETHER) {
580 if (ifmr.ifm_status & IFM_ACTIVE) {
581 if (p->fec_ifstat == -1 ||
582 p->fec_ifstat == 0) {
584 kprintf("fec%d: port %s in bundle "
585 "is up\n", priv->unit,
589 if (p->fec_ifstat == -1 ||
590 p->fec_ifstat == 1) {
592 kprintf("fec%d: port %s in bundle "
593 "is down\n", priv->unit,
598 ifnet_deserialize_all(ifp);
601 ifp = &priv->arpcom.ac_if;
602 if (ifp->if_flags & IFF_RUNNING)
603 callout_reset(&priv->fec_timeout, hz, ng_fec_tick, priv);
607 ng_fec_ifmedia_upd(struct ifnet *ifp)
613 ng_fec_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr)
615 struct ng_fec_private *priv;
616 struct ng_fec_bundle *b;
617 struct ng_fec_portlist *p;
619 priv = ifp->if_softc;
620 b = &priv->fec_bundle;
622 ifmr->ifm_status = IFM_AVALID;
623 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
625 ifmr->ifm_status |= IFM_ACTIVE;
632 * Process an ioctl for the virtual interface
635 ng_fec_ioctl(struct ifnet *ifp, u_long command, caddr_t data, struct ucred *cr)
637 struct ifreq *const ifr = (struct ifreq *) data;
639 struct ng_fec_private *priv;
640 struct ng_fec_bundle *b;
642 priv = ifp->if_softc;
643 b = &priv->fec_bundle;
646 ng_fec_print_ioctl(ifp, command, data);
651 /* These two are mostly handled at a higher layer */
655 error = ether_ioctl(ifp, command, data);
661 * If the interface is marked up and stopped, then start it.
662 * If it is marked down and running, then stop it.
664 if (ifr->ifr_flags & IFF_UP) {
665 if (!(ifp->if_flags & IFF_RUNNING)) {
667 if (b->fec_ifcnt == 1 || b->fec_ifcnt == 3) {
668 kprintf("fec%d: invalid bundle "
669 "size: %d\n", priv->unit,
674 ifq_clr_oactive(&ifp->if_snd);
675 ifp->if_flags |= IFF_RUNNING;
679 * Bubble down changes in promisc mode to
680 * underlying interfaces.
682 if ((ifp->if_flags & IFF_PROMISC) !=
683 (priv->if_flags & IFF_PROMISC)) {
684 ng_fec_setport(ifp, command, data);
685 priv->if_flags = ifp->if_flags;
688 if (ifp->if_flags & IFF_RUNNING) {
689 ifp->if_flags &= ~IFF_RUNNING;
690 ifq_clr_oactive(&ifp->if_snd);
698 ng_fec_setport(ifp, command, data);
703 error = ifmedia_ioctl(ifp, ifr, &priv->ifmedia, command);
705 /* Stuff that's not supported */
719 * This routine spies on mbufs passing through ether_input(). If
720 * they come from one of the interfaces that are aggregated into
721 * our bundle, we fix up the ifnet pointer and increment our
722 * packet counters so that it looks like the frames are actually
726 ng_fec_input(struct ifnet *ifp, struct mbuf **m0)
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)
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;
767 bpf_mtap(bifp->if_bpf, m);
773 * Take a quick peek at the packet and see if it's ok for us to use
774 * the inet or inet6 hash methods on it, if they're enabled. We do
775 * this by setting flags in the mbuf header. Once we've made up our
776 * mind what to do, we pass the frame to ether_output() for further
781 ng_fec_output_serialized(struct ifnet *ifp, struct mbuf *m,
782 struct sockaddr *dst, struct rtentry *rt0)
784 const priv_p priv = (priv_p) ifp->if_softc;
785 struct ng_fec_bundle *b;
788 /* Check interface flags */
789 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) {
794 b = &priv->fec_bundle;
796 switch (b->fec_btype) {
798 m->m_flags |= M_FEC_MAC;
803 * We can't use the INET address port selection
804 * scheme if this isn't an INET packet.
806 if (dst->sa_family == AF_INET)
807 m->m_flags |= M_FEC_INET;
809 else if (dst->sa_family == AF_INET6)
810 m->m_flags |= M_FEC_INET6;
814 kprintf("%s: can't do inet aggregation of non "
815 "inet packet\n", ifp->if_xname);
817 m->m_flags |= M_FEC_MAC;
822 kprintf("%s: bogus hash type: %d\n", ifp->if_xname,
830 * Pass the frame to ether_output() for all the protocol
831 * handling. This will put the ethernet header on the packet
835 error = priv->real_if_output(ifp, m, dst, rt0);
836 if (priv->if_error && !error)
837 error = priv->if_error;
843 ng_fec_output(struct ifnet *ifp, struct mbuf *m,
844 struct sockaddr *dst, struct rtentry *rt0)
848 ifnet_serialize_tx(ifp);
849 error = ng_fec_output_serialized(ifp, m, dst, rt0);
850 ifnet_deserialize_tx(ifp);
856 * Apply a hash to the source and destination addresses in the packet
857 * in order to select an interface. Also check link status and handle
858 * dead links accordingly.
862 ng_fec_choose_port(struct ng_fec_bundle *b,
863 struct mbuf *m, struct ifnet **ifp)
865 struct ether_header *eh;
874 struct ng_fec_portlist *p;
878 * If there are only two ports, mask off all but the
879 * last bit for XORing. If there are 4, mask off all
880 * but the last 2 bits.
882 mask = b->fec_ifcnt == 2 ? 0x1 : 0x3;
883 eh = mtod(m, struct ether_header *);
885 ip = (struct ip *)(mtod(m, char *) +
886 sizeof(struct ether_header));
888 ip6 = (struct ip6_hdr *)(mtod(m, char *) +
889 sizeof(struct ether_header));
894 * The fg_fec_output() routine is supposed to leave a
895 * flag for us in the mbuf that tells us what hash to
896 * use, but sometimes a new mbuf is prepended to the
897 * chain, so we have to search every mbuf in the chain
902 if (m0->m_flags & (M_FEC_MAC|M_FEC_INET|M_FEC_INET6))
909 switch (m0->m_flags & (M_FEC_MAC|M_FEC_INET|M_FEC_INET6)) {
911 port = (eh->ether_dhost[5] ^
912 eh->ether_shost[5]) & mask;
916 port = (ntohl(ip->ip_dst.s_addr) ^
917 ntohl(ip->ip_src.s_addr)) & mask;
921 port = (ip6->ip6_dst.s6_addr[15] ^
922 ip6->ip6_dst.s6_addr[15]) & mask;
931 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
932 if (port == p->fec_idx)
937 * Now that we've chosen a port, make sure it's
938 * alive. If it's not alive, cycle through the bundle
939 * looking for a port that is alive. If we don't find
940 * any, return an error.
942 if (p->fec_ifstat != 1) {
943 struct ng_fec_portlist *n = NULL;
945 n = TAILQ_NEXT(p, fec_list);
947 n = TAILQ_FIRST(&b->ng_fec_ports);
949 if (n->fec_ifstat == 1)
951 n = TAILQ_NEXT(n, fec_list);
953 n = TAILQ_FIRST(&b->ng_fec_ports);
966 * Now that the packet has been run through ether_output(), yank it
967 * off our own send queue and stick it on the queue for the appropriate
968 * underlying physical interface. Note that if the interface's send
969 * queue is full, we save an error status in our private netgraph
970 * space which will eventually be handed up to ng_fec_output(), which
971 * will return it to the rest of the IP stack. We need to do this
972 * in order to duplicate the effect of ether_output() returning ENOBUFS
973 * when it detects that an interface's send queue is full. There's no
974 * other way to signal the error status from here since the if_start()
975 * routine is spec'ed to return void.
977 * Once the frame is queued, we call ether_output_frame() to initiate
981 ng_fec_start(struct ifnet *ifp)
983 struct ng_fec_private *priv;
984 struct ng_fec_bundle *b;
985 struct ifnet *oifp = NULL;
989 priv = ifp->if_softc;
990 b = &priv->fec_bundle;
992 IF_DEQUEUE(&ifp->if_snd, m0);
998 /* Queue up packet on the proper port. */
999 error = ng_fec_choose_port(b, m0, &oifp);
1003 priv->if_error = ENOBUFS;
1009 * Release current iface's serializer to avoid possible dead lock
1011 priv->if_error = ether_output_frame(oifp, m0);
1016 * Display an ioctl to the virtual interface
1020 ng_fec_print_ioctl(struct ifnet *ifp, int command, caddr_t data)
1024 switch (command & IOC_DIRMASK) {
1040 log(LOG_DEBUG, "%s: %s('%c', %d, char[%d])\n",
1045 IOCPARM_LEN(command));
1049 /************************************************************************
1051 ************************************************************************/
1054 * Constructor for a node
1057 ng_fec_constructor(node_p *nodep)
1059 char ifname[NG_FEC_FEC_NAME_MAX + 1];
1063 struct ng_fec_bundle *b;
1066 /* Allocate node and interface private structures */
1067 priv = kmalloc(sizeof(*priv), M_NETGRAPH, M_NOWAIT | M_ZERO);
1071 ifp = &priv->arpcom.ac_if;
1072 b = &priv->fec_bundle;
1074 /* Link them together */
1075 ifp->if_softc = priv;
1077 /* Get an interface unit number */
1078 if ((error = ng_fec_get_unit(&priv->unit)) != 0) {
1079 kfree(ifp, M_NETGRAPH);
1080 kfree(priv, M_NETGRAPH);
1084 /* Call generic node constructor */
1085 if ((error = ng_make_node_common(&typestruct, nodep)) != 0) {
1086 ng_fec_free_unit(priv->unit);
1087 kfree(ifp, M_NETGRAPH);
1088 kfree(priv, M_NETGRAPH);
1093 /* Link together node and private info */
1094 node->private = priv;
1096 priv->arpcom.ac_netgraph = node;
1098 /* Initialize interface structure */
1099 if_initname(ifp, NG_FEC_FEC_NAME, priv->unit);
1100 ifp->if_start = ng_fec_start;
1101 ifp->if_ioctl = ng_fec_ioctl;
1102 ifp->if_init = ng_fec_init;
1103 ifp->if_watchdog = NULL;
1104 ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
1105 ifp->if_mtu = NG_FEC_MTU_DEFAULT;
1106 ifp->if_flags = (IFF_SIMPLEX|IFF_BROADCAST|IFF_MULTICAST);
1107 ifp->if_type = IFT_PROPVIRTUAL; /* XXX */
1108 ifp->if_addrlen = 0; /* XXX */
1109 ifp->if_hdrlen = 0; /* XXX */
1110 ifp->if_baudrate = 100000000; /* XXX */
1112 /* Give this node the same name as the interface (if possible) */
1113 bzero(ifname, sizeof(ifname));
1114 strlcpy(ifname, ifp->if_xname, sizeof(ifname));
1115 if (ng_name_node(node, ifname) != 0)
1116 log(LOG_WARNING, "%s: can't acquire netgraph name\n", ifname);
1118 /* Grab hold of the ether_input pipe. */
1119 if (ng_ether_input_p == NULL)
1120 ng_ether_input_p = ng_fec_input;
1122 /* Attach the interface */
1123 ether_ifattach(ifp, priv->arpcom.ac_enaddr, NULL);
1124 priv->real_if_output = ifp->if_output;
1125 ifp->if_output = ng_fec_output;
1126 callout_init(&priv->fec_timeout);
1128 TAILQ_INIT(&b->ng_fec_ports);
1131 ifmedia_init(&priv->ifmedia, 0,
1132 ng_fec_ifmedia_upd, ng_fec_ifmedia_sts);
1133 ifmedia_add(&priv->ifmedia, IFM_ETHER|IFM_NONE, 0, NULL);
1134 ifmedia_set(&priv->ifmedia, IFM_ETHER|IFM_NONE);
1141 * Receive a control message
1144 ng_fec_rcvmsg(node_p node, struct ng_mesg *msg,
1145 const char *retaddr, struct ng_mesg **rptr)
1147 const priv_p priv = node->private;
1148 struct ng_fec_bundle *b;
1149 struct ng_mesg *resp = NULL;
1153 b = &priv->fec_bundle;
1155 switch (msg->header.typecookie) {
1156 case NGM_FEC_COOKIE:
1157 switch (msg->header.cmd) {
1158 case NGM_FEC_ADD_IFACE:
1160 error = ng_fec_addport(priv, ifname);
1162 case NGM_FEC_DEL_IFACE:
1164 error = ng_fec_delport(priv, ifname);
1166 case NGM_FEC_SET_MODE_MAC:
1167 b->fec_btype = FEC_BTYPE_MAC;
1170 case NGM_FEC_SET_MODE_INET:
1171 b->fec_btype = FEC_BTYPE_INET;
1174 case NGM_FEC_SET_MODE_INET6:
1175 b->fec_btype = FEC_BTYPE_INET6;
1191 kfree(resp, M_NETGRAPH);
1192 kfree(msg, M_NETGRAPH);
1197 * Shutdown and remove the node and its associated interface.
1200 ng_fec_rmnode(node_p node)
1202 const priv_p priv = node->private;
1203 struct ng_fec_bundle *b;
1204 struct ng_fec_portlist *p;
1205 char ifname[IFNAMSIZ];
1207 b = &priv->fec_bundle;
1208 ng_fec_stop(&priv->arpcom.ac_if);
1210 while (!TAILQ_EMPTY(&b->ng_fec_ports)) {
1211 p = TAILQ_FIRST(&b->ng_fec_ports);
1212 ksprintf(ifname, "%s",
1213 p->fec_if->if_xname); /* XXX: strings */
1214 ng_fec_delport(priv, ifname);
1219 if (ng_ether_input_p != NULL)
1220 ng_ether_input_p = NULL;
1221 ether_ifdetach(&priv->arpcom.ac_if);
1222 ifmedia_removeall(&priv->ifmedia);
1223 ng_fec_free_unit(priv->unit);
1224 kfree(priv, M_NETGRAPH);
1225 node->private = NULL;