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: releng/6.3/sys/netgraph/ng_fec.c 170499 2007-06-10 07:41:25Z dwmalone $
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_arp.h>
108 #include <net/if_media.h>
109 #include <net/bpf.h>
110 #include <net/ethernet.h>
111
112 #include "opt_inet.h"
113 #include "opt_inet6.h"
114
115 #include <netinet/in.h>
116 #ifdef INET
117 #include <netinet/in_systm.h>
118 #include <netinet/ip.h>
119 #endif
120
121 #ifdef INET6
122 #include <netinet/ip6.h>
123 #endif
124
125 #include <netgraph/ng_message.h>
126 #include <netgraph/netgraph.h>
127 #include <netgraph/ng_parse.h>
128 #include <netgraph/ng_fec.h>
129
130 /*
131 * We need a way to stash a pointer to our netgraph node in the
132 * ifnet structure so that receive handling works. As far as I can
133 * tell, although there is an AF_NETGRAPH address family, it's only
134 * used to identify sockaddr_ng structures: there is no netgraph address
135 * family domain. This means the AF_NETGRAPH entry in ifp->if_afdata
136 * should be unused, so we can use to hold our node context.
137 */
138 #define IFP2NG(ifp) ((ifp)->if_afdata[AF_NETGRAPH])
139
140 /*
141 * Current fast etherchannel implementations use either 2 or 4
142 * ports, so for now we limit the maximum bundle size to 4 interfaces.
143 */
144 #define FEC_BUNDLESIZ 4
145
146 struct ng_fec_portlist {
147 struct ifnet *fec_if;
148 void (*fec_if_input) (struct ifnet *,
149 struct mbuf *);
150 int fec_idx;
151 int fec_ifstat;
152 struct ether_addr fec_mac;
153 SLIST_HEAD(__mclhd, ng_fec_mc) fec_mc_head;
154 TAILQ_ENTRY(ng_fec_portlist) fec_list;
155 };
156
157 struct ng_fec_mc {
158 struct ifmultiaddr *mc_ifma;
159 SLIST_ENTRY(ng_fec_mc) mc_entries;
160 };
161
162 struct ng_fec_bundle {
163 TAILQ_HEAD(,ng_fec_portlist) ng_fec_ports;
164 int fec_ifcnt;
165 int fec_btype;
166 int (*fec_if_output) (struct ifnet *,
167 struct mbuf *,
168 struct sockaddr *,
169 struct rtentry *);
170 };
171
172 #define FEC_BTYPE_MAC 0x01
173 #define FEC_BTYPE_INET 0x02
174 #define FEC_BTYPE_INET6 0x03
175
176 /* Node private data */
177 struct ng_fec_private {
178 struct ifnet *ifp;
179 struct ifmedia ifmedia;
180 int if_flags;
181 int if_error; /* XXX */
182 int unit; /* Interface unit number */
183 node_p node; /* Our netgraph node */
184 struct ng_fec_bundle fec_bundle;/* Aggregate bundle */
185 struct callout_handle fec_ch; /* callout handle for ticker */
186 };
187 typedef struct ng_fec_private *priv_p;
188
189 /* Interface methods */
190 static void ng_fec_input(struct ifnet *, struct mbuf *);
191 static void ng_fec_start(struct ifnet *ifp);
192 static int ng_fec_choose_port(struct ng_fec_bundle *b,
193 struct mbuf *m, struct ifnet **ifp);
194 static int ng_fec_setport(struct ifnet *ifp, u_long cmd, caddr_t data);
195 static void ng_fec_init(void *arg);
196 static void ng_fec_stop(struct ifnet *ifp);
197 static int ng_fec_ifmedia_upd(struct ifnet *ifp);
198 static void ng_fec_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr);
199 static int ng_fec_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data);
200 static int ng_fec_output(struct ifnet *ifp, struct mbuf *m0,
201 struct sockaddr *dst, struct rtentry *rt0);
202 static void ng_fec_tick(void *arg);
203 static int ng_fec_addport(struct ng_fec_private *priv, char *iface);
204 static int ng_fec_delport(struct ng_fec_private *priv, char *iface);
205 static int ng_fec_ether_cmdmulti(struct ifnet *trifp, struct ng_fec_portlist *p, int set);
206
207 #ifdef DEBUG
208 static void ng_fec_print_ioctl(struct ifnet *ifp, int cmd, caddr_t data);
209 #endif
210
211 /* Netgraph methods */
212 static int ng_fec_mod_event(module_t, int, void *);
213 static ng_constructor_t ng_fec_constructor;
214 static ng_rcvmsg_t ng_fec_rcvmsg;
215 static ng_shutdown_t ng_fec_shutdown;
216
217 /* List of commands and how to convert arguments to/from ASCII */
218 static const struct ng_cmdlist ng_fec_cmds[] = {
219 {
220 NGM_FEC_COOKIE,
221 NGM_FEC_ADD_IFACE,
222 "add_iface",
223 &ng_parse_string_type,
224 NULL,
225 },
226 {
227 NGM_FEC_COOKIE,
228 NGM_FEC_DEL_IFACE,
229 "del_iface",
230 &ng_parse_string_type,
231 NULL,
232 },
233 {
234 NGM_FEC_COOKIE,
235 NGM_FEC_SET_MODE_MAC,
236 "set_mode_mac",
237 NULL,
238 NULL,
239 },
240 {
241 NGM_FEC_COOKIE,
242 NGM_FEC_SET_MODE_INET,
243 "set_mode_inet",
244 NULL,
245 NULL,
246 },
247 { 0 }
248 };
249
250 /* Node type descriptor */
251 static struct ng_type typestruct = {
252 .version = NG_ABI_VERSION,
253 .name = NG_FEC_NODE_TYPE,
254 .mod_event = ng_fec_mod_event,
255 .constructor = ng_fec_constructor,
256 .rcvmsg = ng_fec_rcvmsg,
257 .shutdown = ng_fec_shutdown,
258 .cmdlist = ng_fec_cmds,
259 };
260 NETGRAPH_INIT(fec, &typestruct);
261
262 /* We keep a bitmap indicating which unit numbers are free.
263 One means the unit number is free, zero means it's taken. */
264 static int *ng_fec_units = NULL;
265 static int ng_fec_units_len = 0;
266 static int ng_units_in_use = 0;
267
268 #define UNITS_BITSPERWORD (sizeof(*ng_fec_units) * NBBY)
269
270 static struct mtx ng_fec_mtx;
271
272 /*
273 * Find the first free unit number for a new interface.
274 * Increase the size of the unit bitmap as necessary.
275 */
276 static __inline int
277 ng_fec_get_unit(int *unit)
278 {
279 int index, bit;
280
281 mtx_lock(&ng_fec_mtx);
282 for (index = 0; index < ng_fec_units_len
283 && ng_fec_units[index] == 0; index++);
284 if (index == ng_fec_units_len) { /* extend array */
285 int i, *newarray, newlen;
286
287 newlen = (2 * ng_fec_units_len) + 4;
288 MALLOC(newarray, int *, newlen * sizeof(*ng_fec_units),
289 M_NETGRAPH, M_NOWAIT);
290 if (newarray == NULL) {
291 mtx_unlock(&ng_fec_mtx);
292 return (ENOMEM);
293 }
294 bcopy(ng_fec_units, newarray,
295 ng_fec_units_len * sizeof(*ng_fec_units));
296 for (i = ng_fec_units_len; i < newlen; i++)
297 newarray[i] = ~0;
298 if (ng_fec_units != NULL)
299 FREE(ng_fec_units, M_NETGRAPH);
300 ng_fec_units = newarray;
301 ng_fec_units_len = newlen;
302 }
303 bit = ffs(ng_fec_units[index]) - 1;
304 KASSERT(bit >= 0 && bit <= UNITS_BITSPERWORD - 1,
305 ("%s: word=%d bit=%d", __FUNCTION__, ng_fec_units[index], bit));
306 ng_fec_units[index] &= ~(1 << bit);
307 *unit = (index * UNITS_BITSPERWORD) + bit;
308 ng_units_in_use++;
309 mtx_unlock(&ng_fec_mtx);
310 return (0);
311 }
312
313 /*
314 * Free a no longer needed unit number.
315 */
316 static __inline void
317 ng_fec_free_unit(int unit)
318 {
319 int index, bit;
320
321 index = unit / UNITS_BITSPERWORD;
322 bit = unit % UNITS_BITSPERWORD;
323 mtx_lock(&ng_fec_mtx);
324 KASSERT(index < ng_fec_units_len,
325 ("%s: unit=%d len=%d", __FUNCTION__, unit, ng_fec_units_len));
326 KASSERT((ng_fec_units[index] & (1 << bit)) == 0,
327 ("%s: unit=%d is free", __FUNCTION__, unit));
328 ng_fec_units[index] |= (1 << bit);
329 /*
330 * XXX We could think about reducing the size of ng_fec_units[]
331 * XXX here if the last portion is all ones
332 * XXX At least free it if no more units
333 * Needed if we are to eventually be able to unload.
334 */
335 ng_units_in_use--;
336 if (ng_units_in_use == 0) { /* XXX make SMP safe */
337 FREE(ng_fec_units, M_NETGRAPH);
338 ng_fec_units_len = 0;
339 ng_fec_units = NULL;
340 }
341 mtx_unlock(&ng_fec_mtx);
342 }
343
344 /************************************************************************
345 INTERFACE STUFF
346 ************************************************************************/
347
348 static int
349 ng_fec_addport(struct ng_fec_private *priv, char *iface)
350 {
351 struct ng_fec_bundle *b;
352 struct ifnet *ifp, *bifp;
353 struct ng_fec_portlist *p, *new;
354
355 if (priv == NULL || iface == NULL)
356 return(EINVAL);
357
358 b = &priv->fec_bundle;
359 ifp = priv->ifp;
360
361 /* Only allow reconfiguration if not running. */
362 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
363 printf("fec%d: can't add new iface; bundle is running\n",
364 priv->unit);
365 return (EINVAL);
366 }
367
368 /* Find the interface */
369 bifp = ifunit(iface);
370 if (bifp == NULL) {
371 printf("fec%d: tried to add iface %s, which "
372 "doesn't seem to exist\n", priv->unit, iface);
373 return(ENOENT);
374 }
375
376 /* See if we have room in the bundle */
377 if (b->fec_ifcnt == FEC_BUNDLESIZ) {
378 printf("fec%d: can't add new iface; bundle is full\n",
379 priv->unit);
380 return(ENOSPC);
381 }
382
383 /* See if the interface is already in the bundle */
384 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
385 if (p->fec_if == bifp) {
386 printf("fec%d: iface %s is already in this "
387 "bundle\n", priv->unit, iface);
388 return(EINVAL);
389 }
390 }
391
392 /*
393 * All interfaces must use the same output vector. Once the
394 * user attaches an interface of one type, make all subsequent
395 * interfaces have the same output vector.
396 */
397 if (b->fec_if_output != NULL) {
398 if (b->fec_if_output != bifp->if_output) {
399 printf("fec%d: iface %s is not the same type "
400 "as the other interface(s) already in "
401 "the bundle\n", priv->unit, iface);
402 return(EINVAL);
403 }
404 }
405
406 /* Allocate new list entry. */
407 MALLOC(new, struct ng_fec_portlist *,
408 sizeof(struct ng_fec_portlist), M_NETGRAPH, M_NOWAIT);
409 if (new == NULL)
410 return(ENOMEM);
411
412 IF_AFDATA_LOCK(bifp);
413 IFP2NG(bifp) = priv->node;
414 IF_AFDATA_UNLOCK(bifp);
415
416 /*
417 * If this is the first interface added to the bundle,
418 * use its MAC address for the virtual interface (and,
419 * by extension, all the other ports in the bundle).
420 */
421 if (b->fec_ifcnt == 0)
422 if_setlladdr(ifp, IFP2ENADDR(bifp), ETHER_ADDR_LEN);
423
424 b->fec_btype = FEC_BTYPE_MAC;
425 new->fec_idx = b->fec_ifcnt;
426 b->fec_ifcnt++;
427
428 /* Initialise the list of multicast addresses that we own. */
429 SLIST_INIT(&new->fec_mc_head);
430
431 /* Save the real MAC address. */
432 bcopy(IFP2ENADDR(bifp),
433 (char *)&new->fec_mac, ETHER_ADDR_LEN);
434
435 /* Set up phony MAC address. */
436 if_setlladdr(bifp, IFP2ENADDR(ifp), ETHER_ADDR_LEN);
437
438 /* Save original input vector */
439 new->fec_if_input = bifp->if_input;
440
441 /* Override it with our own */
442 bifp->if_input = ng_fec_input;
443
444 /* Save output vector too. */
445 if (b->fec_if_output == NULL)
446 b->fec_if_output = bifp->if_output;
447
448 /* Add to the queue */
449 new->fec_if = bifp;
450 new->fec_ifstat = -1;
451 TAILQ_INSERT_TAIL(&b->ng_fec_ports, new, fec_list);
452
453 /* Add multicast addresses to this port. */
454 ng_fec_ether_cmdmulti(ifp, new, 1);
455
456 return(0);
457 }
458
459 static int
460 ng_fec_delport(struct ng_fec_private *priv, char *iface)
461 {
462 struct ng_fec_bundle *b;
463 struct ifnet *ifp, *bifp;
464 struct ng_fec_portlist *p;
465
466 if (priv == NULL || iface == NULL)
467 return(EINVAL);
468
469 b = &priv->fec_bundle;
470 ifp = priv->ifp;
471
472 /* Only allow reconfiguration if not running. */
473 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
474 printf("fec%d: can't remove iface; bundle is running\n",
475 priv->unit);
476 return (EINVAL);
477 }
478
479 /* Find the interface */
480 bifp = ifunit(iface);
481 if (bifp == NULL) {
482 printf("fec%d: tried to remove iface %s, which "
483 "doesn't seem to exist\n", priv->unit, iface);
484 return(ENOENT);
485 }
486
487 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
488 if (p->fec_if == bifp)
489 break;
490 }
491
492 if (p == NULL) {
493 printf("fec%d: tried to remove iface %s which "
494 "is not in our bundle\n", priv->unit, iface);
495 return(EINVAL);
496 }
497
498 /* Stop interface */
499 bifp->if_flags &= ~IFF_UP;
500 (*bifp->if_ioctl)(bifp, SIOCSIFFLAGS, NULL);
501
502 /* Restore MAC address. */
503 if_setlladdr(bifp, (u_char *)&p->fec_mac, ETHER_ADDR_LEN);
504
505 /* Restore input vector */
506 bifp->if_input = p->fec_if_input;
507
508 /* Remove our node context pointer. */
509 IF_AFDATA_LOCK(bifp);
510 IFP2NG(bifp) = NULL;
511 IF_AFDATA_UNLOCK(bifp);
512
513 /* Delete port */
514 TAILQ_REMOVE(&b->ng_fec_ports, p, fec_list);
515 FREE(p, M_NETGRAPH);
516 b->fec_ifcnt--;
517
518 if (b->fec_ifcnt == 0)
519 b->fec_if_output = NULL;
520
521 return(0);
522 }
523
524 static int
525 ng_fec_ether_cmdmulti(struct ifnet *trifp, struct ng_fec_portlist *p, int set)
526 {
527 struct ifnet *ifp = p->fec_if;
528 struct ng_fec_mc *mc;
529 struct ifmultiaddr *ifma, *rifma = NULL;
530 struct sockaddr_dl sdl;
531 int error;
532
533 bzero((char *)&sdl, sizeof(sdl));
534 sdl.sdl_len = sizeof(sdl);
535 sdl.sdl_family = AF_LINK;
536 sdl.sdl_type = IFT_ETHER;
537 sdl.sdl_alen = ETHER_ADDR_LEN;
538 sdl.sdl_index = ifp->if_index;
539
540 if (set) {
541 TAILQ_FOREACH(ifma, &trifp->if_multiaddrs, ifma_link) {
542 if (ifma->ifma_addr->sa_family != AF_LINK)
543 continue;
544 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
545 LLADDR(&sdl), ETHER_ADDR_LEN);
546
547 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma);
548 if (error)
549 return (error);
550 mc = malloc(sizeof(struct ng_fec_mc), M_DEVBUF, M_NOWAIT);
551 if (mc == NULL)
552 return (ENOMEM);
553 mc->mc_ifma = rifma;
554 SLIST_INSERT_HEAD(&p->fec_mc_head, mc, mc_entries);
555 }
556 } else {
557 while ((mc = SLIST_FIRST(&p->fec_mc_head)) != NULL) {
558 SLIST_REMOVE(&p->fec_mc_head, mc, ng_fec_mc, mc_entries);
559 ifma = mc->mc_ifma;
560 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
561 LLADDR(&sdl), ETHER_ADDR_LEN);
562 if_delmulti(ifp, (struct sockaddr *)&sdl);
563 free(mc, M_DEVBUF);
564 }
565 }
566 return (0);
567 }
568
569 static int
570 ng_fec_ether_setmulti(struct ifnet *ifp)
571 {
572 struct ng_fec_private *priv;
573 struct ng_fec_bundle *b;
574 struct ng_fec_portlist *p;
575
576 priv = ifp->if_softc;
577 b = &priv->fec_bundle;
578
579 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
580 /* First, remove any existing filter entries. */
581 ng_fec_ether_cmdmulti(ifp, p, 0);
582 /* copy all addresses from the fec interface to the port */
583 ng_fec_ether_cmdmulti(ifp, p, 1);
584 }
585 return (0);
586 }
587
588 /*
589 * Pass an ioctl command down to all the underyling interfaces in a
590 * bundle. Used for setting flags.
591 */
592
593 static int
594 ng_fec_setport(struct ifnet *ifp, u_long command, caddr_t data)
595 {
596 struct ng_fec_private *priv;
597 struct ng_fec_bundle *b;
598 struct ifnet *oifp;
599 struct ng_fec_portlist *p;
600
601 priv = ifp->if_softc;
602 b = &priv->fec_bundle;
603
604 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
605 oifp = p->fec_if;
606 if (oifp != NULL)
607 (*oifp->if_ioctl)(oifp, command, data);
608 }
609
610 return(0);
611 }
612
613 static void
614 ng_fec_init(void *arg)
615 {
616 struct ng_fec_private *priv;
617 struct ng_fec_bundle *b;
618 struct ifnet *ifp, *bifp;
619 struct ng_fec_portlist *p;
620
621 priv = arg;
622 ifp = priv->ifp;
623 b = &priv->fec_bundle;
624
625 if (b->fec_ifcnt != 2 && b->fec_ifcnt != FEC_BUNDLESIZ) {
626 printf("fec%d: invalid bundle "
627 "size: %d\n", priv->unit,
628 b->fec_ifcnt);
629 return;
630 }
631
632 ng_fec_stop(ifp);
633
634 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
635 bifp = p->fec_if;
636 bifp->if_flags |= IFF_UP;
637 (*bifp->if_ioctl)(bifp, SIOCSIFFLAGS, NULL);
638 /* mark iface as up and let the monitor check it */
639 p->fec_ifstat = -1;
640 }
641
642 ifp->if_drv_flags &= ~(IFF_DRV_OACTIVE);
643 ifp->if_drv_flags |= IFF_DRV_RUNNING;
644
645 priv->fec_ch = timeout(ng_fec_tick, priv, hz);
646
647 return;
648 }
649
650 static void
651 ng_fec_stop(struct ifnet *ifp)
652 {
653 struct ng_fec_private *priv;
654 struct ng_fec_bundle *b;
655 struct ifnet *bifp;
656 struct ng_fec_portlist *p;
657
658 priv = ifp->if_softc;
659 b = &priv->fec_bundle;
660
661 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
662 bifp = p->fec_if;
663 bifp->if_flags &= ~IFF_UP;
664 (*bifp->if_ioctl)(bifp, SIOCSIFFLAGS, NULL);
665 }
666
667 untimeout(ng_fec_tick, priv, priv->fec_ch);
668
669 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
670
671 return;
672 }
673
674 static void
675 ng_fec_tick(void *arg)
676 {
677 struct ng_fec_private *priv;
678 struct ng_fec_bundle *b;
679 struct ifmediareq ifmr;
680 struct ifnet *ifp;
681 struct ng_fec_portlist *p;
682 int error = 0;
683
684 priv = arg;
685 b = &priv->fec_bundle;
686
687 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
688 bzero((char *)&ifmr, sizeof(ifmr));
689 ifp = p->fec_if;
690 error = (*ifp->if_ioctl)(ifp, SIOCGIFMEDIA, (caddr_t)&ifmr);
691 if (error) {
692 printf("fec%d: failed to check status "
693 "of link %s\n", priv->unit, ifp->if_xname);
694 continue;
695 }
696
697 if (ifmr.ifm_status & IFM_AVALID) {
698 if (ifmr.ifm_status & IFM_ACTIVE) {
699 if (p->fec_ifstat == -1 ||
700 p->fec_ifstat == 0) {
701 p->fec_ifstat = 1;
702 printf("fec%d: port %s in bundle "
703 "is up\n", priv->unit,
704 ifp->if_xname);
705 }
706 } else {
707 if (p->fec_ifstat == -1 ||
708 p->fec_ifstat == 1) {
709 p->fec_ifstat = 0;
710 printf("fec%d: port %s in bundle "
711 "is down\n", priv->unit,
712 ifp->if_xname);
713 }
714 }
715 }
716 }
717
718 ifp = priv->ifp;
719 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
720 priv->fec_ch = timeout(ng_fec_tick, priv, hz);
721
722 return;
723 }
724
725 static int
726 ng_fec_ifmedia_upd(struct ifnet *ifp)
727 {
728 return(0);
729 }
730
731 static void ng_fec_ifmedia_sts(struct ifnet *ifp,
732 struct ifmediareq *ifmr)
733 {
734 struct ng_fec_private *priv;
735 struct ng_fec_bundle *b;
736 struct ng_fec_portlist *p;
737
738 priv = ifp->if_softc;
739 b = &priv->fec_bundle;
740
741 ifmr->ifm_status = IFM_AVALID;
742 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
743 if (p->fec_ifstat == 1) {
744 ifmr->ifm_status |= IFM_ACTIVE;
745 break;
746 }
747 }
748
749 return;
750 }
751
752 /*
753 * Process an ioctl for the virtual interface
754 */
755 static int
756 ng_fec_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
757 {
758 struct ifreq *const ifr = (struct ifreq *) data;
759 int s, error = 0;
760 struct ng_fec_private *priv;
761 struct ng_fec_bundle *b;
762
763 priv = ifp->if_softc;
764 b = &priv->fec_bundle;
765
766 #ifdef DEBUG
767 ng_fec_print_ioctl(ifp, command, data);
768 #endif
769 s = splimp();
770 switch (command) {
771
772 /* These two are mostly handled at a higher layer */
773 case SIOCSIFADDR:
774 case SIOCGIFADDR:
775 error = ether_ioctl(ifp, command, data);
776 break;
777
778 case SIOCSIFMTU:
779 if (ifr->ifr_mtu >= NG_FEC_MTU_MIN &&
780 ifr->ifr_mtu <= NG_FEC_MTU_MAX) {
781 struct ng_fec_portlist *p;
782 struct ifnet *bifp;
783
784 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
785 bifp = p->fec_if;
786 error = (*bifp->if_ioctl)(bifp, SIOCSIFMTU,
787 data);
788 if (error != 0)
789 break;
790 }
791 if (error == 0)
792 ifp->if_mtu = ifr->ifr_mtu;
793 } else
794 error = EINVAL;
795 break;
796
797 /* Set flags */
798 case SIOCSIFFLAGS:
799 /*
800 * If the interface is marked up and stopped, then start it.
801 * If it is marked down and running, then stop it.
802 */
803 if (ifr->ifr_flags & IFF_UP) {
804 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
805 /* Sanity. */
806 if (b->fec_ifcnt != 2 &&
807 b->fec_ifcnt != FEC_BUNDLESIZ) {
808 printf("fec%d: invalid bundle "
809 "size: %d\n", priv->unit,
810 b->fec_ifcnt);
811 error = EINVAL;
812 break;
813 }
814 ng_fec_init(priv);
815 }
816 /*
817 * Bubble down changes in promisc mode to
818 * underlying interfaces.
819 */
820 if ((ifp->if_flags & IFF_PROMISC) !=
821 (priv->if_flags & IFF_PROMISC)) {
822 ng_fec_setport(ifp, command, data);
823 priv->if_flags = ifp->if_flags;
824 }
825 } else {
826 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
827 ng_fec_stop(ifp);
828 }
829 break;
830
831 case SIOCADDMULTI:
832 case SIOCDELMULTI:
833 ng_fec_ether_setmulti(ifp);
834 error = 0;
835 break;
836 case SIOCGIFMEDIA:
837 case SIOCSIFMEDIA:
838 error = ifmedia_ioctl(ifp, ifr, &priv->ifmedia, command);
839 break;
840 /* Stuff that's not supported */
841 case SIOCSIFPHYS:
842 error = EOPNOTSUPP;
843 break;
844
845 default:
846 error = EINVAL;
847 break;
848 }
849 (void) splx(s);
850 return (error);
851 }
852
853 /*
854 * This routine spies on mbufs received by underlying network device
855 * drivers. When we add an interface to our bundle, we override its
856 * if_input routine with a pointer to ng_fec_input(). This means we
857 * get to look at all the device's packets before sending them to the
858 * real ether_input() for processing by the stack. Once we verify the
859 * packet comes from an interface that's been aggregated into
860 * our bundle, we fix up the rcvif pointer and increment our
861 * packet counters so that it looks like the frames are actually
862 * coming from us.
863 */
864 static void
865 ng_fec_input(struct ifnet *ifp, struct mbuf *m0)
866 {
867 struct ng_node *node;
868 struct ng_fec_private *priv;
869 struct ng_fec_bundle *b;
870 struct ifnet *bifp;
871 struct ng_fec_portlist *p;
872
873 /* Sanity check */
874 if (ifp == NULL || m0 == NULL)
875 return;
876
877 node = IFP2NG(ifp);
878
879 /* Sanity check part II */
880 if (node == NULL)
881 return;
882
883 priv = NG_NODE_PRIVATE(node);
884 b = &priv->fec_bundle;
885 bifp = priv->ifp;
886
887 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
888 if (p->fec_if == m0->m_pkthdr.rcvif)
889 break;
890 }
891
892 /* Wasn't meant for us; leave this frame alone. */
893 if (p == NULL)
894 return;
895
896 /*
897 * Check for a BPF tap on the underlying interface. This
898 * is mainly a debugging aid: it allows tcpdump-ing of an
899 * individual interface in a bundle to work, which it
900 * otherwise would not. BPF tapping of our own aggregate
901 * interface will occur once we call ether_input().
902 */
903 BPF_MTAP(m0->m_pkthdr.rcvif, m0);
904
905 /* Convince the system that this is our frame. */
906 m0->m_pkthdr.rcvif = bifp;
907
908 /*
909 * Count bytes on an individual interface in a bundle.
910 * The bytes will also be added to the aggregate interface
911 * once we call ether_input().
912 */
913 ifp->if_ibytes += m0->m_pkthdr.len;
914
915 bifp->if_ipackets++;
916 (*bifp->if_input)(bifp, m0);
917
918 return;
919 }
920
921 /*
922 * Take a quick peek at the packet and see if it's ok for us to use
923 * the inet or inet6 hash methods on it, if they're enabled. We do
924 * this by setting flags in the mbuf header. Once we've made up our
925 * mind what to do, we pass the frame to output vector for further
926 * processing.
927 */
928
929 static int
930 ng_fec_output(struct ifnet *ifp, struct mbuf *m,
931 struct sockaddr *dst, struct rtentry *rt0)
932 {
933 const priv_p priv = (priv_p) ifp->if_softc;
934 struct ng_fec_bundle *b;
935 int error;
936
937 /* Check interface flags */
938 if (!((ifp->if_flags & IFF_UP) &&
939 (ifp->if_drv_flags & IFF_DRV_RUNNING))) {
940 m_freem(m);
941 return (ENETDOWN);
942 }
943
944 b = &priv->fec_bundle;
945
946 switch (b->fec_btype) {
947 case FEC_BTYPE_MAC:
948 m->m_flags |= M_FEC_MAC;
949 break;
950 #ifdef INET
951 case FEC_BTYPE_INET:
952 /*
953 * We can't use the INET address port selection
954 * scheme if this isn't an INET packet.
955 */
956 if (dst->sa_family == AF_INET)
957 m->m_flags |= M_FEC_INET;
958 #ifdef INET6
959 else if (dst->sa_family == AF_INET6)
960 m->m_flags |= M_FEC_INET6;
961 #endif
962 else {
963 #ifdef DEBUG
964 if_printf(ifp, "can't do inet aggregation of non "
965 "inet packet\n");
966 #endif
967 m->m_flags |= M_FEC_MAC;
968 }
969 break;
970 #endif
971 default:
972 if_printf(ifp, "bogus hash type: %d\n",
973 b->fec_btype);
974 m_freem(m);
975 return(EINVAL);
976 break;
977 }
978
979 /*
980 * Pass the frame to the output vector for all the protocol
981 * handling. This will put the ethernet header on the packet
982 * for us.
983 */
984 priv->if_error = 0;
985 error = (*b->fec_if_output)(ifp, m, dst, rt0);
986 if (priv->if_error && !error)
987 error = priv->if_error;
988
989 return(error);
990 }
991
992 /*
993 * Apply a hash to the source and destination addresses in the packet
994 * in order to select an interface. Also check link status and handle
995 * dead links accordingly.
996 */
997
998 static int
999 ng_fec_choose_port(struct ng_fec_bundle *b,
1000 struct mbuf *m, struct ifnet **ifp)
1001 {
1002 struct ether_header *eh;
1003 struct mbuf *m0;
1004 #ifdef INET
1005 struct ip *ip;
1006 #ifdef INET6
1007 struct ip6_hdr *ip6;
1008 #endif
1009 #endif
1010
1011 struct ng_fec_portlist *p;
1012 int port = 0, mask;
1013
1014 /*
1015 * If there are only two ports, mask off all but the
1016 * last bit for XORing. If there are 4, mask off all
1017 * but the last 2 bits.
1018 */
1019 mask = b->fec_ifcnt == 2 ? 0x1 : 0x3;
1020 eh = mtod(m, struct ether_header *);
1021 #ifdef INET
1022 ip = (struct ip *)(mtod(m, char *) +
1023 sizeof(struct ether_header));
1024 #ifdef INET6
1025 ip6 = (struct ip6_hdr *)(mtod(m, char *) +
1026 sizeof(struct ether_header));
1027 #endif
1028 #endif
1029
1030 /*
1031 * The fg_fec_output() routine is supposed to leave a
1032 * flag for us in the mbuf that tells us what hash to
1033 * use, but sometimes a new mbuf is prepended to the
1034 * chain, so we have to search every mbuf in the chain
1035 * to find the flags.
1036 */
1037 m0 = m;
1038 while (m0) {
1039 if (m0->m_flags & (M_FEC_MAC|M_FEC_INET|M_FEC_INET6))
1040 break;
1041 m0 = m0->m_next;
1042 }
1043 if (m0 == NULL)
1044 return(EINVAL);
1045
1046 switch (m0->m_flags & (M_FEC_MAC|M_FEC_INET|M_FEC_INET6)) {
1047 case M_FEC_MAC:
1048 port = (eh->ether_dhost[5] ^
1049 eh->ether_shost[5]) & mask;
1050 break;
1051 #ifdef INET
1052 case M_FEC_INET:
1053 port = (ntohl(ip->ip_dst.s_addr) ^
1054 ntohl(ip->ip_src.s_addr)) & mask;
1055 break;
1056 #ifdef INET6
1057 case M_FEC_INET6:
1058 port = (ip6->ip6_dst.s6_addr[15] ^
1059 ip6->ip6_dst.s6_addr[15]) & mask;
1060 break;
1061 #endif
1062 #endif
1063 default:
1064 return(EINVAL);
1065 break;
1066 }
1067
1068 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
1069 if (port == p->fec_idx)
1070 break;
1071 }
1072
1073 /*
1074 * Now that we've chosen a port, make sure it's
1075 * alive. If it's not alive, cycle through the bundle
1076 * looking for a port that is alive. If we don't find
1077 * any, return an error.
1078 */
1079 if (p->fec_ifstat != 1) {
1080 struct ng_fec_portlist *n = NULL;
1081
1082 n = TAILQ_NEXT(p, fec_list);
1083 if (n == NULL)
1084 n = TAILQ_FIRST(&b->ng_fec_ports);
1085 while (n != p) {
1086 if (n->fec_ifstat == 1)
1087 break;
1088 n = TAILQ_NEXT(n, fec_list);
1089 if (n == NULL)
1090 n = TAILQ_FIRST(&b->ng_fec_ports);
1091 }
1092 if (n == p)
1093 return(EAGAIN);
1094 p = n;
1095 }
1096
1097 *ifp = p->fec_if;
1098
1099 return(0);
1100 }
1101
1102 /*
1103 * Now that the packet has been run through ether_output(), yank it
1104 * off our own send queue and stick it on the queue for the appropriate
1105 * underlying physical interface. Note that if the interface's send
1106 * queue is full, we save an error status in our private netgraph
1107 * space which will eventually be handed up to ng_fec_output(), which
1108 * will return it to the rest of the IP stack. We need to do this
1109 * in order to duplicate the effect of ether_output() returning ENOBUFS
1110 * when it detects that an interface's send queue is full. There's no
1111 * other way to signal the error status from here since the if_start()
1112 * routine is spec'ed to return void.
1113 *
1114 * Once the frame is queued, we call ether_output_frame() to initiate
1115 * transmission.
1116 */
1117 static void
1118 ng_fec_start(struct ifnet *ifp)
1119 {
1120 struct ng_fec_private *priv;
1121 struct ng_fec_bundle *b;
1122 struct ifnet *oifp = NULL;
1123 struct mbuf *m0;
1124 int error;
1125
1126 priv = ifp->if_softc;
1127 b = &priv->fec_bundle;
1128
1129 IF_DEQUEUE(&ifp->if_snd, m0);
1130 if (m0 == NULL)
1131 return;
1132
1133 BPF_MTAP(ifp, m0);
1134
1135 /* Queue up packet on the proper port. */
1136 error = ng_fec_choose_port(b, m0, &oifp);
1137 if (error) {
1138 ifp->if_ierrors++;
1139 m_freem(m0);
1140 priv->if_error = ENOBUFS;
1141 return;
1142 }
1143 ifp->if_opackets++;
1144
1145 priv->if_error = IF_HANDOFF(&oifp->if_snd, m0, oifp) ? 0 : ENOBUFS;
1146
1147 return;
1148 }
1149
1150 #ifdef DEBUG
1151 /*
1152 * Display an ioctl to the virtual interface
1153 */
1154
1155 static void
1156 ng_fec_print_ioctl(struct ifnet *ifp, int command, caddr_t data)
1157 {
1158 char *str;
1159
1160 switch (command & IOC_DIRMASK) {
1161 case IOC_VOID:
1162 str = "IO";
1163 break;
1164 case IOC_OUT:
1165 str = "IOR";
1166 break;
1167 case IOC_IN:
1168 str = "IOW";
1169 break;
1170 case IOC_INOUT:
1171 str = "IORW";
1172 break;
1173 default:
1174 str = "IO??";
1175 }
1176 log(LOG_DEBUG, "%s: %s('%c', %d, char[%d])\n",
1177 ifp->if_xname,
1178 str,
1179 IOCGROUP(command),
1180 command & 0xff,
1181 IOCPARM_LEN(command));
1182 }
1183 #endif /* DEBUG */
1184
1185 /************************************************************************
1186 NETGRAPH NODE STUFF
1187 ************************************************************************/
1188
1189 /*
1190 * Constructor for a node
1191 */
1192 static int
1193 ng_fec_constructor(node_p node)
1194 {
1195 char ifname[NG_FEC_FEC_NAME_MAX + 1];
1196 struct ifnet *ifp;
1197 priv_p priv;
1198 struct ng_fec_bundle *b;
1199 int error = 0;
1200
1201 /* Allocate node and interface private structures */
1202 MALLOC(priv, priv_p, sizeof(*priv), M_NETGRAPH, M_NOWAIT | M_ZERO);
1203 if (priv == NULL)
1204 return (ENOMEM);
1205
1206 ifp = priv->ifp = if_alloc(IFT_ETHER);
1207 if (ifp == NULL) {
1208 FREE(priv, M_NETGRAPH);
1209 return (ENOSPC);
1210 }
1211 b = &priv->fec_bundle;
1212
1213 /* Link them together */
1214 ifp->if_softc = priv;
1215
1216 /* Get an interface unit number */
1217 if ((error = ng_fec_get_unit(&priv->unit)) != 0) {
1218 if_free(ifp);
1219 FREE(priv, M_NETGRAPH);
1220 return (error);
1221 }
1222
1223 /* Link together node and private info */
1224 NG_NODE_SET_PRIVATE(node, priv);
1225 priv->node = node;
1226
1227 /* Initialize interface structure */
1228 if_initname(ifp, NG_FEC_FEC_NAME, priv->unit);
1229 ifp->if_start = ng_fec_start;
1230 ifp->if_ioctl = ng_fec_ioctl;
1231 ifp->if_init = ng_fec_init;
1232 ifp->if_watchdog = NULL;
1233 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
1234 ifp->if_mtu = NG_FEC_MTU_DEFAULT;
1235 ifp->if_flags = (IFF_SIMPLEX|IFF_BROADCAST|IFF_MULTICAST);
1236 ifp->if_addrlen = 0; /* XXX */
1237 ifp->if_hdrlen = 0; /* XXX */
1238 ifp->if_baudrate = 100000000; /* XXX */
1239 TAILQ_INIT(&ifp->if_addrhead); /* XXX useless - done in if_attach */
1240
1241 /* Give this node the same name as the interface (if possible) */
1242 bzero(ifname, sizeof(ifname));
1243 strlcpy(ifname, ifp->if_xname, sizeof(ifname));
1244 if (ng_name_node(node, ifname) != 0)
1245 log(LOG_WARNING, "%s: can't acquire netgraph name\n", ifname);
1246
1247 /* Attach the interface */
1248 ether_ifattach(ifp, IFP2ENADDR(priv->ifp));
1249 callout_handle_init(&priv->fec_ch);
1250
1251 /* Override output method with our own */
1252 ifp->if_output = ng_fec_output;
1253
1254 TAILQ_INIT(&b->ng_fec_ports);
1255 b->fec_ifcnt = 0;
1256
1257 ifmedia_init(&priv->ifmedia, 0,
1258 ng_fec_ifmedia_upd, ng_fec_ifmedia_sts);
1259 ifmedia_add(&priv->ifmedia, IFM_ETHER|IFM_NONE, 0, NULL);
1260 ifmedia_set(&priv->ifmedia, IFM_ETHER|IFM_NONE);
1261
1262 /* Done */
1263 return (0);
1264 }
1265
1266 /*
1267 * Receive a control message
1268 */
1269 static int
1270 ng_fec_rcvmsg(node_p node, item_p item, hook_p lasthook)
1271 {
1272 const priv_p priv = NG_NODE_PRIVATE(node);
1273 struct ng_fec_bundle *b;
1274 struct ng_mesg *resp = NULL;
1275 struct ng_mesg *msg;
1276 char *ifname;
1277 int error = 0;
1278
1279 NGI_GET_MSG(item, msg);
1280 b = &priv->fec_bundle;
1281
1282 switch (msg->header.typecookie) {
1283 case NGM_FEC_COOKIE:
1284 switch (msg->header.cmd) {
1285 case NGM_FEC_ADD_IFACE:
1286 ifname = msg->data;
1287 error = ng_fec_addport(priv, ifname);
1288 break;
1289 case NGM_FEC_DEL_IFACE:
1290 ifname = msg->data;
1291 error = ng_fec_delport(priv, ifname);
1292 break;
1293 case NGM_FEC_SET_MODE_MAC:
1294 b->fec_btype = FEC_BTYPE_MAC;
1295 break;
1296 #ifdef INET
1297 case NGM_FEC_SET_MODE_INET:
1298 b->fec_btype = FEC_BTYPE_INET;
1299 break;
1300 #ifdef INET6
1301 case NGM_FEC_SET_MODE_INET6:
1302 b->fec_btype = FEC_BTYPE_INET6;
1303 break;
1304 #endif
1305 #endif
1306 default:
1307 error = EINVAL;
1308 break;
1309 }
1310 break;
1311 default:
1312 error = EINVAL;
1313 break;
1314 }
1315 NG_RESPOND_MSG(error, node, item, resp);
1316 NG_FREE_MSG(msg);
1317 return (error);
1318 }
1319
1320 /*
1321 * Shutdown and remove the node and its associated interface.
1322 */
1323 static int
1324 ng_fec_shutdown(node_p node)
1325 {
1326 const priv_p priv = NG_NODE_PRIVATE(node);
1327 struct ng_fec_bundle *b;
1328 struct ng_fec_portlist *p;
1329
1330 b = &priv->fec_bundle;
1331 ng_fec_stop(priv->ifp);
1332
1333 while (!TAILQ_EMPTY(&b->ng_fec_ports)) {
1334 p = TAILQ_FIRST(&b->ng_fec_ports);
1335 ng_fec_ether_cmdmulti(priv->ifp, p, 0);
1336 ng_fec_delport(priv, p->fec_if->if_xname);
1337 }
1338
1339 ether_ifdetach(priv->ifp);
1340 if_free_type(priv->ifp, IFT_ETHER);
1341 ifmedia_removeall(&priv->ifmedia);
1342 ng_fec_free_unit(priv->unit);
1343 FREE(priv, M_NETGRAPH);
1344 NG_NODE_SET_PRIVATE(node, NULL);
1345 NG_NODE_UNREF(node);
1346 return (0);
1347 }
1348
1349 /*
1350 * Handle loading and unloading for this node type.
1351 */
1352 static int
1353 ng_fec_mod_event(module_t mod, int event, void *data)
1354 {
1355 int error = 0;
1356
1357 switch (event) {
1358 case MOD_LOAD:
1359 mtx_init(&ng_fec_mtx, "ng_fec", NULL, MTX_DEF);
1360 break;
1361 case MOD_UNLOAD:
1362 mtx_destroy(&ng_fec_mtx);
1363 break;
1364 default:
1365 error = EOPNOTSUPP;
1366 break;
1367 }
1368 return (error);
1369 }
Cache object: 6ced1f82cf07f0d6248de1959f58c8bc
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