FreeBSD/Linux Kernel Cross Reference
sys/netgraph/ng_fec.c
1 /*
2 * ng_fec.c
3 */
4
5 /*-
6 * Copyright (c) 2001 Berkeley Software Design, Inc.
7 * Copyright (c) 2000, 2001
8 * Bill Paul <wpaul@osd.bsdi.com>. All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by Bill Paul.
21 * 4. Neither the name of the author nor the names of any co-contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
35 * THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * $FreeBSD: src/sys/netgraph/ng_fec.c,v 1.32 2008/10/23 20:26:15 des Exp $
38 */
39 /*-
40 * Copyright (c) 1996-1999 Whistle Communications, Inc.
41 * All rights reserved.
42 *
43 * Subject to the following obligations and disclaimer of warranty, use and
44 * redistribution of this software, in source or object code forms, with or
45 * without modifications are expressly permitted by Whistle Communications;
46 * provided, however, that:
47 * 1. Any and all reproductions of the source or object code must include the
48 * copyright notice above and the following disclaimer of warranties; and
49 * 2. No rights are granted, in any manner or form, to use Whistle
50 * Communications, Inc. trademarks, including the mark "WHISTLE
51 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as
52 * such appears in the above copyright notice or in the software.
53 *
54 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
55 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
56 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
57 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
58 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
59 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
60 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
61 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
62 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
63 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
64 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
65 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
66 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
67 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
68 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
69 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
70 * OF SUCH DAMAGE.
71 *
72 * Author: Archie Cobbs <archie@freebsd.org>
73 *
74 * $Whistle: ng_fec.c,v 1.33 1999/11/01 09:24:51 julian Exp $
75 */
76
77 /*
78 * This module implements ethernet channel bonding using the Cisco
79 * Fast EtherChannel mechanism. Two or four ports may be combined
80 * into a single aggregate interface.
81 *
82 * Interfaces are named fec0, fec1, etc. New nodes take the
83 * first available interface name.
84 *
85 * This node also includes Berkeley packet filter support.
86 *
87 * Note that this node doesn't need to connect to any other
88 * netgraph nodes in order to do its work.
89 */
90
91 #include <sys/param.h>
92 #include <sys/systm.h>
93 #include <sys/errno.h>
94 #include <sys/kernel.h>
95 #include <sys/malloc.h>
96 #include <sys/mbuf.h>
97 #include <sys/errno.h>
98 #include <sys/sockio.h>
99 #include <sys/socket.h>
100 #include <sys/syslog.h>
101 #include <sys/libkern.h>
102 #include <sys/queue.h>
103
104 #include <net/if.h>
105 #include <net/if_dl.h>
106 #include <net/if_types.h>
107 #include <net/if_media.h>
108 #include <net/bpf.h>
109 #include <net/ethernet.h>
110
111 #include "opt_inet.h"
112 #include "opt_inet6.h"
113
114 #include <netinet/in.h>
115 #ifdef INET
116 #include <netinet/in_systm.h>
117 #include <netinet/ip.h>
118 #endif
119
120 #ifdef INET6
121 #include <netinet/ip6.h>
122 #endif
123
124 #include <netgraph/ng_message.h>
125 #include <netgraph/netgraph.h>
126 #include <netgraph/ng_parse.h>
127 #include <netgraph/ng_fec.h>
128
129 /*
130 * We need a way to stash a pointer to our netgraph node in the
131 * ifnet structure so that receive handling works. As far as I can
132 * tell, although there is an AF_NETGRAPH address family, it's only
133 * used to identify sockaddr_ng structures: there is no netgraph address
134 * family domain. This means the AF_NETGRAPH entry in ifp->if_afdata
135 * should be unused, so we can use to hold our node context.
136 */
137 #define IFP2NG(ifp) ((ifp)->if_afdata[AF_NETGRAPH])
138
139 /*
140 * Current fast etherchannel implementations use either 2 or 4
141 * ports, so for now we limit the maximum bundle size to 4 interfaces.
142 */
143 #define FEC_BUNDLESIZ 4
144
145 struct ng_fec_portlist {
146 struct ifnet *fec_if;
147 void (*fec_if_input) (struct ifnet *,
148 struct mbuf *);
149 int fec_idx;
150 int fec_ifstat;
151 struct ether_addr fec_mac;
152 SLIST_HEAD(__mclhd, ng_fec_mc) fec_mc_head;
153 TAILQ_ENTRY(ng_fec_portlist) fec_list;
154 };
155
156 struct ng_fec_mc {
157 struct ifmultiaddr *mc_ifma;
158 SLIST_ENTRY(ng_fec_mc) mc_entries;
159 };
160
161 struct ng_fec_bundle {
162 TAILQ_HEAD(,ng_fec_portlist) ng_fec_ports;
163 int fec_ifcnt;
164 int fec_btype;
165 int (*fec_if_output) (struct ifnet *,
166 struct mbuf *,
167 struct sockaddr *,
168 struct rtentry *);
169 };
170
171 #define FEC_BTYPE_MAC 0x01
172 #define FEC_BTYPE_INET 0x02
173 #define FEC_BTYPE_INET6 0x03
174
175 /* Node private data */
176 struct ng_fec_private {
177 struct ifnet *ifp;
178 struct ifmedia ifmedia;
179 int if_flags;
180 int if_error; /* XXX */
181 int unit; /* Interface unit number */
182 node_p node; /* Our netgraph node */
183 struct ng_fec_bundle fec_bundle;/* Aggregate bundle */
184 struct callout_handle fec_ch; /* callout handle for ticker */
185 };
186 typedef struct ng_fec_private *priv_p;
187
188 /* Interface methods */
189 static void ng_fec_input(struct ifnet *, struct mbuf *);
190 static void ng_fec_start(struct ifnet *ifp);
191 static int ng_fec_choose_port(struct ng_fec_bundle *b,
192 struct mbuf *m, struct ifnet **ifp);
193 static int ng_fec_setport(struct ifnet *ifp, u_long cmd, caddr_t data);
194 static void ng_fec_init(void *arg);
195 static void ng_fec_stop(struct ifnet *ifp);
196 static int ng_fec_ifmedia_upd(struct ifnet *ifp);
197 static void ng_fec_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr);
198 static int ng_fec_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data);
199 static int ng_fec_output(struct ifnet *ifp, struct mbuf *m0,
200 struct sockaddr *dst, struct rtentry *rt0);
201 static void ng_fec_tick(void *arg);
202 static int ng_fec_addport(struct ng_fec_private *priv, char *iface);
203 static int ng_fec_delport(struct ng_fec_private *priv, char *iface);
204 static int ng_fec_ether_cmdmulti(struct ifnet *trifp, struct ng_fec_portlist *p, int set);
205
206 #ifdef DEBUG
207 static void ng_fec_print_ioctl(struct ifnet *ifp, int cmd, caddr_t data);
208 #endif
209
210 /* Netgraph methods */
211 static int ng_fec_mod_event(module_t, int, void *);
212 static ng_constructor_t ng_fec_constructor;
213 static ng_rcvmsg_t ng_fec_rcvmsg;
214 static ng_shutdown_t ng_fec_shutdown;
215
216 /* List of commands and how to convert arguments to/from ASCII */
217 static const struct ng_cmdlist ng_fec_cmds[] = {
218 {
219 NGM_FEC_COOKIE,
220 NGM_FEC_ADD_IFACE,
221 "add_iface",
222 &ng_parse_string_type,
223 NULL,
224 },
225 {
226 NGM_FEC_COOKIE,
227 NGM_FEC_DEL_IFACE,
228 "del_iface",
229 &ng_parse_string_type,
230 NULL,
231 },
232 {
233 NGM_FEC_COOKIE,
234 NGM_FEC_SET_MODE_MAC,
235 "set_mode_mac",
236 NULL,
237 NULL,
238 },
239 {
240 NGM_FEC_COOKIE,
241 NGM_FEC_SET_MODE_INET,
242 "set_mode_inet",
243 NULL,
244 NULL,
245 },
246 { 0 }
247 };
248
249 /* Node type descriptor */
250 static struct ng_type typestruct = {
251 .version = NG_ABI_VERSION,
252 .name = NG_FEC_NODE_TYPE,
253 .mod_event = ng_fec_mod_event,
254 .constructor = ng_fec_constructor,
255 .rcvmsg = ng_fec_rcvmsg,
256 .shutdown = ng_fec_shutdown,
257 .cmdlist = ng_fec_cmds,
258 };
259 NETGRAPH_INIT(fec, &typestruct);
260
261 /* We keep a bitmap indicating which unit numbers are free.
262 One means the unit number is free, zero means it's taken. */
263 static int *ng_fec_units = NULL;
264 static int ng_fec_units_len = 0;
265 static int ng_units_in_use = 0;
266
267 #define UNITS_BITSPERWORD (sizeof(*ng_fec_units) * NBBY)
268
269 static struct mtx ng_fec_mtx;
270
271 /*
272 * Find the first free unit number for a new interface.
273 * Increase the size of the unit bitmap as necessary.
274 */
275 static __inline int
276 ng_fec_get_unit(int *unit)
277 {
278 int index, bit;
279
280 mtx_lock(&ng_fec_mtx);
281 for (index = 0; index < ng_fec_units_len
282 && ng_fec_units[index] == 0; index++);
283 if (index == ng_fec_units_len) { /* extend array */
284 int i, *newarray, newlen;
285
286 newlen = (2 * ng_fec_units_len) + 4;
287 newarray = malloc(newlen * sizeof(*ng_fec_units),
288 M_NETGRAPH, M_NOWAIT);
289 if (newarray == NULL) {
290 mtx_unlock(&ng_fec_mtx);
291 return (ENOMEM);
292 }
293 bcopy(ng_fec_units, newarray,
294 ng_fec_units_len * sizeof(*ng_fec_units));
295 for (i = ng_fec_units_len; i < newlen; i++)
296 newarray[i] = ~0;
297 if (ng_fec_units != NULL)
298 free(ng_fec_units, M_NETGRAPH);
299 ng_fec_units = newarray;
300 ng_fec_units_len = newlen;
301 }
302 bit = ffs(ng_fec_units[index]) - 1;
303 KASSERT(bit >= 0 && bit <= UNITS_BITSPERWORD - 1,
304 ("%s: word=%d bit=%d", __func__, ng_fec_units[index], bit));
305 ng_fec_units[index] &= ~(1 << bit);
306 *unit = (index * UNITS_BITSPERWORD) + bit;
307 ng_units_in_use++;
308 mtx_unlock(&ng_fec_mtx);
309 return (0);
310 }
311
312 /*
313 * Free a no longer needed unit number.
314 */
315 static __inline void
316 ng_fec_free_unit(int unit)
317 {
318 int index, bit;
319
320 index = unit / UNITS_BITSPERWORD;
321 bit = unit % UNITS_BITSPERWORD;
322 mtx_lock(&ng_fec_mtx);
323 KASSERT(index < ng_fec_units_len,
324 ("%s: unit=%d len=%d", __func__, unit, ng_fec_units_len));
325 KASSERT((ng_fec_units[index] & (1 << bit)) == 0,
326 ("%s: unit=%d is free", __func__, unit));
327 ng_fec_units[index] |= (1 << bit);
328 /*
329 * XXX We could think about reducing the size of ng_fec_units[]
330 * XXX here if the last portion is all ones
331 * XXX At least free it if no more units
332 * Needed if we are to eventually be able to unload.
333 */
334 ng_units_in_use--;
335 if (ng_units_in_use == 0) { /* XXX make SMP safe */
336 free(ng_fec_units, M_NETGRAPH);
337 ng_fec_units_len = 0;
338 ng_fec_units = NULL;
339 }
340 mtx_unlock(&ng_fec_mtx);
341 }
342
343 /************************************************************************
344 INTERFACE STUFF
345 ************************************************************************/
346
347 static int
348 ng_fec_addport(struct ng_fec_private *priv, char *iface)
349 {
350 struct ng_fec_bundle *b;
351 struct ifnet *ifp, *bifp;
352 struct ng_fec_portlist *p, *new;
353
354 if (priv == NULL || iface == NULL)
355 return(EINVAL);
356
357 b = &priv->fec_bundle;
358 ifp = priv->ifp;
359
360 /* Only allow reconfiguration if not running. */
361 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
362 printf("fec%d: can't add new iface; bundle is running\n",
363 priv->unit);
364 return (EINVAL);
365 }
366
367 /* Find the interface */
368 bifp = ifunit(iface);
369 if (bifp == NULL) {
370 printf("fec%d: tried to add iface %s, which "
371 "doesn't seem to exist\n", priv->unit, iface);
372 return(ENOENT);
373 }
374
375 /* See if we have room in the bundle */
376 if (b->fec_ifcnt == FEC_BUNDLESIZ) {
377 printf("fec%d: can't add new iface; bundle is full\n",
378 priv->unit);
379 return(ENOSPC);
380 }
381
382 /* See if the interface is already in the bundle */
383 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
384 if (p->fec_if == bifp) {
385 printf("fec%d: iface %s is already in this "
386 "bundle\n", priv->unit, iface);
387 return(EINVAL);
388 }
389 }
390
391 /*
392 * All interfaces must use the same output vector. Once the
393 * user attaches an interface of one type, make all subsequent
394 * interfaces have the same output vector.
395 */
396 if (b->fec_if_output != NULL) {
397 if (b->fec_if_output != bifp->if_output) {
398 printf("fec%d: iface %s is not the same type "
399 "as the other interface(s) already in "
400 "the bundle\n", priv->unit, iface);
401 return(EINVAL);
402 }
403 }
404
405 /* Allocate new list entry. */
406 new = malloc(sizeof(struct ng_fec_portlist), M_NETGRAPH, M_NOWAIT);
407 if (new == NULL)
408 return(ENOMEM);
409
410 IF_AFDATA_LOCK(bifp);
411 IFP2NG(bifp) = priv->node;
412 IF_AFDATA_UNLOCK(bifp);
413
414 /*
415 * If this is the first interface added to the bundle,
416 * use its MAC address for the virtual interface (and,
417 * by extension, all the other ports in the bundle).
418 */
419 if (b->fec_ifcnt == 0)
420 if_setlladdr(ifp, IF_LLADDR(bifp), ETHER_ADDR_LEN);
421
422 b->fec_btype = FEC_BTYPE_MAC;
423 new->fec_idx = b->fec_ifcnt;
424 b->fec_ifcnt++;
425
426 /* Initialise the list of multicast addresses that we own. */
427 SLIST_INIT(&new->fec_mc_head);
428
429 /* Save the real MAC address. */
430 bcopy(IF_LLADDR(bifp),
431 (char *)&new->fec_mac, ETHER_ADDR_LEN);
432
433 /* Set up phony MAC address. */
434 if_setlladdr(bifp, IF_LLADDR(ifp), ETHER_ADDR_LEN);
435
436 /* Save original input vector */
437 new->fec_if_input = bifp->if_input;
438
439 /* Override it with our own */
440 bifp->if_input = ng_fec_input;
441
442 /* Save output vector too. */
443 if (b->fec_if_output == NULL)
444 b->fec_if_output = bifp->if_output;
445
446 /* Add to the queue */
447 new->fec_if = bifp;
448 new->fec_ifstat = -1;
449 TAILQ_INSERT_TAIL(&b->ng_fec_ports, new, fec_list);
450
451 /* Add multicast addresses to this port. */
452 ng_fec_ether_cmdmulti(ifp, new, 1);
453
454 return(0);
455 }
456
457 static int
458 ng_fec_delport(struct ng_fec_private *priv, char *iface)
459 {
460 struct ng_fec_bundle *b;
461 struct ifnet *ifp, *bifp;
462 struct ng_fec_portlist *p;
463
464 if (priv == NULL || iface == NULL)
465 return(EINVAL);
466
467 b = &priv->fec_bundle;
468 ifp = priv->ifp;
469
470 /* Only allow reconfiguration if not running. */
471 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
472 printf("fec%d: can't remove iface; bundle is running\n",
473 priv->unit);
474 return (EINVAL);
475 }
476
477 /* Find the interface */
478 bifp = ifunit(iface);
479 if (bifp == NULL) {
480 printf("fec%d: tried to remove iface %s, which "
481 "doesn't seem to exist\n", priv->unit, iface);
482 return(ENOENT);
483 }
484
485 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
486 if (p->fec_if == bifp)
487 break;
488 }
489
490 if (p == NULL) {
491 printf("fec%d: tried to remove iface %s which "
492 "is not in our bundle\n", priv->unit, iface);
493 return(EINVAL);
494 }
495
496 /* Stop interface */
497 bifp->if_flags &= ~IFF_UP;
498 (*bifp->if_ioctl)(bifp, SIOCSIFFLAGS, NULL);
499
500 /* Restore MAC address. */
501 if_setlladdr(bifp, (u_char *)&p->fec_mac, ETHER_ADDR_LEN);
502
503 /* Restore input vector */
504 bifp->if_input = p->fec_if_input;
505
506 /* Remove our node context pointer. */
507 IF_AFDATA_LOCK(bifp);
508 IFP2NG(bifp) = NULL;
509 IF_AFDATA_UNLOCK(bifp);
510
511 /* Delete port */
512 TAILQ_REMOVE(&b->ng_fec_ports, p, fec_list);
513 free(p, M_NETGRAPH);
514 b->fec_ifcnt--;
515
516 if (b->fec_ifcnt == 0)
517 b->fec_if_output = NULL;
518
519 return(0);
520 }
521
522 static int
523 ng_fec_ether_cmdmulti(struct ifnet *trifp, struct ng_fec_portlist *p, int set)
524 {
525 struct ifnet *ifp = p->fec_if;
526 struct ng_fec_mc *mc;
527 struct ifmultiaddr *ifma, *rifma = NULL;
528 struct sockaddr_dl sdl;
529 int error;
530
531 bzero((char *)&sdl, sizeof(sdl));
532 sdl.sdl_len = sizeof(sdl);
533 sdl.sdl_family = AF_LINK;
534 sdl.sdl_type = IFT_ETHER;
535 sdl.sdl_alen = ETHER_ADDR_LEN;
536 sdl.sdl_index = ifp->if_index;
537
538 if (set) {
539 TAILQ_FOREACH(ifma, &trifp->if_multiaddrs, ifma_link) {
540 if (ifma->ifma_addr->sa_family != AF_LINK)
541 continue;
542 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
543 LLADDR(&sdl), ETHER_ADDR_LEN);
544
545 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma);
546 if (error)
547 return (error);
548 mc = malloc(sizeof(struct ng_fec_mc), M_DEVBUF, M_NOWAIT);
549 if (mc == NULL)
550 return (ENOMEM);
551 mc->mc_ifma = rifma;
552 SLIST_INSERT_HEAD(&p->fec_mc_head, mc, mc_entries);
553 }
554 } else {
555 while ((mc = SLIST_FIRST(&p->fec_mc_head)) != NULL) {
556 SLIST_REMOVE(&p->fec_mc_head, mc, ng_fec_mc, mc_entries);
557 if_delmulti_ifma(mc->mc_ifma);
558 free(mc, M_DEVBUF);
559 }
560 }
561 return (0);
562 }
563
564 static int
565 ng_fec_ether_setmulti(struct ifnet *ifp)
566 {
567 struct ng_fec_private *priv;
568 struct ng_fec_bundle *b;
569 struct ng_fec_portlist *p;
570
571 priv = ifp->if_softc;
572 b = &priv->fec_bundle;
573
574 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
575 /* First, remove any existing filter entries. */
576 ng_fec_ether_cmdmulti(ifp, p, 0);
577 /* copy all addresses from the fec interface to the port */
578 ng_fec_ether_cmdmulti(ifp, p, 1);
579 }
580 return (0);
581 }
582
583 /*
584 * Pass an ioctl command down to all the underyling interfaces in a
585 * bundle. Used for setting flags.
586 */
587
588 static int
589 ng_fec_setport(struct ifnet *ifp, u_long command, caddr_t data)
590 {
591 struct ng_fec_private *priv;
592 struct ng_fec_bundle *b;
593 struct ifnet *oifp;
594 struct ng_fec_portlist *p;
595
596 priv = ifp->if_softc;
597 b = &priv->fec_bundle;
598
599 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
600 oifp = p->fec_if;
601 if (oifp != NULL)
602 (*oifp->if_ioctl)(oifp, command, data);
603 }
604
605 return(0);
606 }
607
608 static void
609 ng_fec_init(void *arg)
610 {
611 struct ng_fec_private *priv;
612 struct ng_fec_bundle *b;
613 struct ifnet *ifp, *bifp;
614 struct ng_fec_portlist *p;
615
616 priv = arg;
617 ifp = priv->ifp;
618 b = &priv->fec_bundle;
619
620 if (b->fec_ifcnt != 2 && b->fec_ifcnt != FEC_BUNDLESIZ) {
621 printf("fec%d: invalid bundle "
622 "size: %d\n", priv->unit,
623 b->fec_ifcnt);
624 return;
625 }
626
627 ng_fec_stop(ifp);
628
629 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
630 bifp = p->fec_if;
631 bifp->if_flags |= IFF_UP;
632 (*bifp->if_ioctl)(bifp, SIOCSIFFLAGS, NULL);
633 /* mark iface as up and let the monitor check it */
634 p->fec_ifstat = -1;
635 }
636
637 ifp->if_drv_flags &= ~(IFF_DRV_OACTIVE);
638 ifp->if_drv_flags |= IFF_DRV_RUNNING;
639
640 priv->fec_ch = timeout(ng_fec_tick, priv, hz);
641
642 return;
643 }
644
645 static void
646 ng_fec_stop(struct ifnet *ifp)
647 {
648 struct ng_fec_private *priv;
649 struct ng_fec_bundle *b;
650 struct ifnet *bifp;
651 struct ng_fec_portlist *p;
652
653 priv = ifp->if_softc;
654 b = &priv->fec_bundle;
655
656 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
657 bifp = p->fec_if;
658 bifp->if_flags &= ~IFF_UP;
659 (*bifp->if_ioctl)(bifp, SIOCSIFFLAGS, NULL);
660 }
661
662 untimeout(ng_fec_tick, priv, priv->fec_ch);
663
664 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
665
666 return;
667 }
668
669 static void
670 ng_fec_tick(void *arg)
671 {
672 struct ng_fec_private *priv;
673 struct ng_fec_bundle *b;
674 struct ifmediareq ifmr;
675 struct ifnet *ifp;
676 struct ng_fec_portlist *p;
677 int error = 0;
678
679 priv = arg;
680 b = &priv->fec_bundle;
681
682 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
683 bzero((char *)&ifmr, sizeof(ifmr));
684 ifp = p->fec_if;
685 error = (*ifp->if_ioctl)(ifp, SIOCGIFMEDIA, (caddr_t)&ifmr);
686 if (error) {
687 printf("fec%d: failed to check status "
688 "of link %s\n", priv->unit, ifp->if_xname);
689 continue;
690 }
691
692 if (ifmr.ifm_status & IFM_AVALID) {
693 if (ifmr.ifm_status & IFM_ACTIVE) {
694 if (p->fec_ifstat == -1 ||
695 p->fec_ifstat == 0) {
696 p->fec_ifstat = 1;
697 printf("fec%d: port %s in bundle "
698 "is up\n", priv->unit,
699 ifp->if_xname);
700 }
701 } else {
702 if (p->fec_ifstat == -1 ||
703 p->fec_ifstat == 1) {
704 p->fec_ifstat = 0;
705 printf("fec%d: port %s in bundle "
706 "is down\n", priv->unit,
707 ifp->if_xname);
708 }
709 }
710 }
711 }
712
713 ifp = priv->ifp;
714 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
715 priv->fec_ch = timeout(ng_fec_tick, priv, hz);
716
717 return;
718 }
719
720 static int
721 ng_fec_ifmedia_upd(struct ifnet *ifp)
722 {
723 return(0);
724 }
725
726 static void ng_fec_ifmedia_sts(struct ifnet *ifp,
727 struct ifmediareq *ifmr)
728 {
729 struct ng_fec_private *priv;
730 struct ng_fec_bundle *b;
731 struct ng_fec_portlist *p;
732
733 priv = ifp->if_softc;
734 b = &priv->fec_bundle;
735
736 ifmr->ifm_status = IFM_AVALID;
737 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
738 if (p->fec_ifstat == 1) {
739 ifmr->ifm_status |= IFM_ACTIVE;
740 break;
741 }
742 }
743
744 return;
745 }
746
747 /*
748 * Process an ioctl for the virtual interface
749 */
750 static int
751 ng_fec_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
752 {
753 struct ifreq *const ifr = (struct ifreq *) data;
754 int s, error = 0;
755 struct ng_fec_private *priv;
756 struct ng_fec_bundle *b;
757
758 priv = ifp->if_softc;
759 b = &priv->fec_bundle;
760
761 #ifdef DEBUG
762 ng_fec_print_ioctl(ifp, command, data);
763 #endif
764 s = splimp();
765 switch (command) {
766
767 /* These two are mostly handled at a higher layer */
768 case SIOCSIFADDR:
769 case SIOCGIFADDR:
770 error = ether_ioctl(ifp, command, data);
771 break;
772
773 case SIOCSIFMTU:
774 if (ifr->ifr_mtu >= NG_FEC_MTU_MIN &&
775 ifr->ifr_mtu <= NG_FEC_MTU_MAX) {
776 struct ng_fec_portlist *p;
777 struct ifnet *bifp;
778
779 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
780 bifp = p->fec_if;
781 error = (*bifp->if_ioctl)(bifp, SIOCSIFMTU,
782 data);
783 if (error != 0)
784 break;
785 }
786 if (error == 0)
787 ifp->if_mtu = ifr->ifr_mtu;
788 } else
789 error = EINVAL;
790 break;
791
792 /* Set flags */
793 case SIOCSIFFLAGS:
794 /*
795 * If the interface is marked up and stopped, then start it.
796 * If it is marked down and running, then stop it.
797 */
798 if (ifr->ifr_flags & IFF_UP) {
799 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
800 /* Sanity. */
801 if (b->fec_ifcnt != 2 &&
802 b->fec_ifcnt != FEC_BUNDLESIZ) {
803 printf("fec%d: invalid bundle "
804 "size: %d\n", priv->unit,
805 b->fec_ifcnt);
806 error = EINVAL;
807 break;
808 }
809 ng_fec_init(priv);
810 }
811 /*
812 * Bubble down changes in promisc mode to
813 * underlying interfaces.
814 */
815 if ((ifp->if_flags & IFF_PROMISC) !=
816 (priv->if_flags & IFF_PROMISC)) {
817 ng_fec_setport(ifp, command, data);
818 priv->if_flags = ifp->if_flags;
819 }
820 } else {
821 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
822 ng_fec_stop(ifp);
823 }
824 break;
825
826 case SIOCADDMULTI:
827 case SIOCDELMULTI:
828 ng_fec_ether_setmulti(ifp);
829 error = 0;
830 break;
831 case SIOCGIFMEDIA:
832 case SIOCSIFMEDIA:
833 error = ifmedia_ioctl(ifp, ifr, &priv->ifmedia, command);
834 break;
835 /* Stuff that's not supported */
836 case SIOCSIFPHYS:
837 error = EOPNOTSUPP;
838 break;
839
840 default:
841 error = EINVAL;
842 break;
843 }
844 (void) splx(s);
845 return (error);
846 }
847
848 /*
849 * This routine spies on mbufs received by underlying network device
850 * drivers. When we add an interface to our bundle, we override its
851 * if_input routine with a pointer to ng_fec_input(). This means we
852 * get to look at all the device's packets before sending them to the
853 * real ether_input() for processing by the stack. Once we verify the
854 * packet comes from an interface that's been aggregated into
855 * our bundle, we fix up the rcvif pointer and increment our
856 * packet counters so that it looks like the frames are actually
857 * coming from us.
858 */
859 static void
860 ng_fec_input(struct ifnet *ifp, struct mbuf *m0)
861 {
862 struct ng_node *node;
863 struct ng_fec_private *priv;
864 struct ng_fec_bundle *b;
865 struct ifnet *bifp;
866 struct ng_fec_portlist *p;
867
868 /* Sanity check */
869 if (ifp == NULL || m0 == NULL)
870 return;
871
872 node = IFP2NG(ifp);
873
874 /* Sanity check part II */
875 if (node == NULL)
876 return;
877
878 priv = NG_NODE_PRIVATE(node);
879 b = &priv->fec_bundle;
880 bifp = priv->ifp;
881
882 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
883 if (p->fec_if == m0->m_pkthdr.rcvif)
884 break;
885 }
886
887 /* Wasn't meant for us; leave this frame alone. */
888 if (p == NULL)
889 return;
890
891 /*
892 * Check for a BPF tap on the underlying interface. This
893 * is mainly a debugging aid: it allows tcpdump-ing of an
894 * individual interface in a bundle to work, which it
895 * otherwise would not. BPF tapping of our own aggregate
896 * interface will occur once we call ether_input().
897 */
898 BPF_MTAP(m0->m_pkthdr.rcvif, m0);
899
900 /* Convince the system that this is our frame. */
901 m0->m_pkthdr.rcvif = bifp;
902
903 /*
904 * Count bytes on an individual interface in a bundle.
905 * The bytes will also be added to the aggregate interface
906 * once we call ether_input().
907 */
908 ifp->if_ibytes += m0->m_pkthdr.len;
909
910 bifp->if_ipackets++;
911 (*bifp->if_input)(bifp, m0);
912
913 return;
914 }
915
916 /*
917 * Take a quick peek at the packet and see if it's ok for us to use
918 * the inet or inet6 hash methods on it, if they're enabled. We do
919 * this by setting flags in the mbuf header. Once we've made up our
920 * mind what to do, we pass the frame to output vector for further
921 * processing.
922 */
923
924 static int
925 ng_fec_output(struct ifnet *ifp, struct mbuf *m,
926 struct sockaddr *dst, struct rtentry *rt0)
927 {
928 const priv_p priv = (priv_p) ifp->if_softc;
929 struct ng_fec_bundle *b;
930 int error;
931
932 /* Check interface flags */
933 if (!((ifp->if_flags & IFF_UP) &&
934 (ifp->if_drv_flags & IFF_DRV_RUNNING))) {
935 m_freem(m);
936 return (ENETDOWN);
937 }
938
939 b = &priv->fec_bundle;
940
941 switch (b->fec_btype) {
942 case FEC_BTYPE_MAC:
943 m->m_flags |= M_FEC_MAC;
944 break;
945 #ifdef INET
946 case FEC_BTYPE_INET:
947 /*
948 * We can't use the INET address port selection
949 * scheme if this isn't an INET packet.
950 */
951 if (dst->sa_family == AF_INET)
952 m->m_flags |= M_FEC_INET;
953 #ifdef INET6
954 else if (dst->sa_family == AF_INET6)
955 m->m_flags |= M_FEC_INET6;
956 #endif
957 else {
958 #ifdef DEBUG
959 if_printf(ifp, "can't do inet aggregation of non "
960 "inet packet\n");
961 #endif
962 m->m_flags |= M_FEC_MAC;
963 }
964 break;
965 #endif
966 default:
967 if_printf(ifp, "bogus hash type: %d\n",
968 b->fec_btype);
969 m_freem(m);
970 return(EINVAL);
971 break;
972 }
973
974 /*
975 * Pass the frame to the output vector for all the protocol
976 * handling. This will put the ethernet header on the packet
977 * for us.
978 */
979 priv->if_error = 0;
980 error = (*b->fec_if_output)(ifp, m, dst, rt0);
981 if (priv->if_error && !error)
982 error = priv->if_error;
983
984 return(error);
985 }
986
987 /*
988 * Apply a hash to the source and destination addresses in the packet
989 * in order to select an interface. Also check link status and handle
990 * dead links accordingly.
991 */
992
993 static int
994 ng_fec_choose_port(struct ng_fec_bundle *b,
995 struct mbuf *m, struct ifnet **ifp)
996 {
997 struct ether_header *eh;
998 struct mbuf *m0;
999 #ifdef INET
1000 struct ip *ip;
1001 #ifdef INET6
1002 struct ip6_hdr *ip6;
1003 #endif
1004 #endif
1005
1006 struct ng_fec_portlist *p;
1007 int port = 0, mask;
1008
1009 /*
1010 * If there are only two ports, mask off all but the
1011 * last bit for XORing. If there are 4, mask off all
1012 * but the last 2 bits.
1013 */
1014 mask = b->fec_ifcnt == 2 ? 0x1 : 0x3;
1015 eh = mtod(m, struct ether_header *);
1016 #ifdef INET
1017 ip = (struct ip *)(mtod(m, char *) +
1018 sizeof(struct ether_header));
1019 #ifdef INET6
1020 ip6 = (struct |