kernel/netgraph7: Replace usage of MALLOC/FREE with kmalloc/kfree here too.
[dragonfly.git] / sys / netgraph7 / ng_fec.c
CommitLineData
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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 1.30 2007/05/18 15:05:49 dwmalone Exp $
5a975a3d 38 * $DragonFly: src/sys/netgraph7/ng_fec.c,v 1.2 2008/06/26 23:05:35 dillon Exp $
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39 */
40/*-
41 * Copyright (c) 1996-1999 Whistle Communications, Inc.
42 * All rights reserved.
43 *
44 * Subject to the following obligations and disclaimer of warranty, use and
45 * redistribution of this software, in source or object code forms, with or
46 * without modifications are expressly permitted by Whistle Communications;
47 * provided, however, that:
48 * 1. Any and all reproductions of the source or object code must include the
49 * copyright notice above and the following disclaimer of warranties; and
50 * 2. No rights are granted, in any manner or form, to use Whistle
51 * Communications, Inc. trademarks, including the mark "WHISTLE
52 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as
53 * such appears in the above copyright notice or in the software.
54 *
55 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
56 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
57 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
58 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
59 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
60 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
61 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
62 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
63 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
64 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
65 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
66 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
67 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
68 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
69 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
70 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
71 * OF SUCH DAMAGE.
72 *
73 * Author: Archie Cobbs <archie@freebsd.org>
74 *
75 * $Whistle: ng_fec.c,v 1.33 1999/11/01 09:24:51 julian Exp $
76 */
77
78/*
79 * This module implements ethernet channel bonding using the Cisco
80 * Fast EtherChannel mechanism. Two or four ports may be combined
81 * into a single aggregate interface.
82 *
83 * Interfaces are named fec0, fec1, etc. New nodes take the
84 * first available interface name.
85 *
86 * This node also includes Berkeley packet filter support.
87 *
88 * Note that this node doesn't need to connect to any other
89 * netgraph nodes in order to do its work.
90 */
91
92#include <sys/param.h>
93#include <sys/systm.h>
94#include <sys/errno.h>
95#include <sys/kernel.h>
96#include <sys/malloc.h>
97#include <sys/mbuf.h>
98#include <sys/errno.h>
99#include <sys/sockio.h>
100#include <sys/socket.h>
101#include <sys/syslog.h>
102#include <sys/libkern.h>
103#include <sys/queue.h>
104
105#include <net/if.h>
106#include <net/if_dl.h>
107#include <net/if_types.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
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125#include "ng_message.h"
126#include "netgraph.h"
127#include "ng_parse.h"
128#include "ng_fec.h"
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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
146struct 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
157struct ng_fec_mc {
158 struct ifmultiaddr *mc_ifma;
159 SLIST_ENTRY(ng_fec_mc) mc_entries;
160};
161
162struct 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 */
177struct 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};
187typedef struct ng_fec_private *priv_p;
188
189/* Interface methods */
190static void ng_fec_input(struct ifnet *, struct mbuf *);
191static void ng_fec_start(struct ifnet *ifp);
192static int ng_fec_choose_port(struct ng_fec_bundle *b,
193 struct mbuf *m, struct ifnet **ifp);
194static int ng_fec_setport(struct ifnet *ifp, u_long cmd, caddr_t data);
195static void ng_fec_init(void *arg);
196static void ng_fec_stop(struct ifnet *ifp);
197static int ng_fec_ifmedia_upd(struct ifnet *ifp);
198static void ng_fec_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr);
199static int ng_fec_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data);
200static int ng_fec_output(struct ifnet *ifp, struct mbuf *m0,
201 struct sockaddr *dst, struct rtentry *rt0);
202static void ng_fec_tick(void *arg);
203static int ng_fec_addport(struct ng_fec_private *priv, char *iface);
204static int ng_fec_delport(struct ng_fec_private *priv, char *iface);
205static int ng_fec_ether_cmdmulti(struct ifnet *trifp, struct ng_fec_portlist *p, int set);
206
207#ifdef DEBUG
208static void ng_fec_print_ioctl(struct ifnet *ifp, int cmd, caddr_t data);
209#endif
210
211/* Netgraph methods */
212static int ng_fec_mod_event(module_t, int, void *);
213static ng_constructor_t ng_fec_constructor;
214static ng_rcvmsg_t ng_fec_rcvmsg;
215static ng_shutdown_t ng_fec_shutdown;
216
217/* List of commands and how to convert arguments to/from ASCII */
218static 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 */
251static 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};
260NETGRAPH_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. */
264static int *ng_fec_units = NULL;
265static int ng_fec_units_len = 0;
266static int ng_units_in_use = 0;
267
268#define UNITS_BITSPERWORD (sizeof(*ng_fec_units) * NBBY)
269
270static 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 */
276static __inline int
277ng_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;
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288 newarray = kmalloc(newlen * sizeof(*ng_fec_units),
289 M_NETGRAPH, M_WAITOK | M_NULLOK);
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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)
fc025606 299 kfree(ng_fec_units, M_NETGRAPH);
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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", __func__, 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 */
316static __inline void
317ng_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", __func__, unit, ng_fec_units_len));
326 KASSERT((ng_fec_units[index] & (1 << bit)) == 0,
327 ("%s: unit=%d is free", __func__, 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 */
fc025606 337 kfree(ng_fec_units, M_NETGRAPH);
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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
348static int
349ng_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. */
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407 new = kmalloc(sizeof(struct ng_fec_portlist), M_NETGRAPH,
408 M_WAITOK | M_NULLOK);
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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, IF_LLADDR(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(IF_LLADDR(bifp),
433 (char *)&new->fec_mac, ETHER_ADDR_LEN);
434
435 /* Set up phony MAC address. */
436 if_setlladdr(bifp, IF_LLADDR(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
459static int
460ng_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);
fc025606 515 kfree(p, M_NETGRAPH);
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516 b->fec_ifcnt--;
517
518 if (b->fec_ifcnt == 0)
519 b->fec_if_output = NULL;
520
521 return(0);
522}
523
524static int
525ng_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);
5a975a3d 550 mc = kmalloc(sizeof(struct ng_fec_mc), M_DEVBUF, M_WAITOK | M_NULLOK);
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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 if_delmulti_ifma(mc->mc_ifma);
5a975a3d 560 kfree(mc, M_DEVBUF);
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561 }
562 }
563 return (0);
564}
565
566static int
567ng_fec_ether_setmulti(struct ifnet *ifp)
568{
569 struct ng_fec_private *priv;
570 struct ng_fec_bundle *b;
571 struct ng_fec_portlist *p;
572
573 priv = ifp->if_softc;
574 b = &priv->fec_bundle;
575
576 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
577 /* First, remove any existing filter entries. */
578 ng_fec_ether_cmdmulti(ifp, p, 0);
579 /* copy all addresses from the fec interface to the port */
580 ng_fec_ether_cmdmulti(ifp, p, 1);
581 }
582 return (0);
583}
584
585/*
586 * Pass an ioctl command down to all the underyling interfaces in a
587 * bundle. Used for setting flags.
588 */
589
590static int
591ng_fec_setport(struct ifnet *ifp, u_long command, caddr_t data)
592{
593 struct ng_fec_private *priv;
594 struct ng_fec_bundle *b;
595 struct ifnet *oifp;
596 struct ng_fec_portlist *p;
597
598 priv = ifp->if_softc;
599 b = &priv->fec_bundle;
600
601 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
602 oifp = p->fec_if;
603 if (oifp != NULL)
604 (*oifp->if_ioctl)(oifp, command, data);
605 }
606
607 return(0);
608}
609
610static void
611ng_fec_init(void *arg)
612{
613 struct ng_fec_private *priv;
614 struct ng_fec_bundle *b;
615 struct ifnet *ifp, *bifp;
616 struct ng_fec_portlist *p;
617
618 priv = arg;
619 ifp = priv->ifp;
620 b = &priv->fec_bundle;
621
622 if (b->fec_ifcnt != 2 && b->fec_ifcnt != FEC_BUNDLESIZ) {
623 printf("fec%d: invalid bundle "
624 "size: %d\n", priv->unit,
625 b->fec_ifcnt);
626 return;
627 }
628
629 ng_fec_stop(ifp);
630
631 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
632 bifp = p->fec_if;
633 bifp->if_flags |= IFF_UP;
634 (*bifp->if_ioctl)(bifp, SIOCSIFFLAGS, NULL);
635 /* mark iface as up and let the monitor check it */
636 p->fec_ifstat = -1;
637 }
638
639 ifp->if_drv_flags &= ~(IFF_DRV_OACTIVE);
640 ifp->if_drv_flags |= IFF_DRV_RUNNING;
641
642 priv->fec_ch = timeout(ng_fec_tick, priv, hz);
643
644 return;
645}
646
647static void
648ng_fec_stop(struct ifnet *ifp)
649{
650 struct ng_fec_private *priv;
651 struct ng_fec_bundle *b;
652 struct ifnet *bifp;
653 struct ng_fec_portlist *p;
654
655 priv = ifp->if_softc;
656 b = &priv->fec_bundle;
657
658 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
659 bifp = p->fec_if;
660 bifp->if_flags &= ~IFF_UP;
661 (*bifp->if_ioctl)(bifp, SIOCSIFFLAGS, NULL);
662 }
663
664 untimeout(ng_fec_tick, priv, priv->fec_ch);
665
666 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
667
668 return;
669}
670
671static void
672ng_fec_tick(void *arg)
673{
674 struct ng_fec_private *priv;
675 struct ng_fec_bundle *b;
676 struct ifmediareq ifmr;
677 struct ifnet *ifp;
678 struct ng_fec_portlist *p;
679 int error = 0;
680
681 priv = arg;
682 b = &priv->fec_bundle;
683
684 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
685 bzero((char *)&ifmr, sizeof(ifmr));
686 ifp = p->fec_if;
687 error = (*ifp->if_ioctl)(ifp, SIOCGIFMEDIA, (caddr_t)&ifmr);
688 if (error) {
689 printf("fec%d: failed to check status "
690 "of link %s\n", priv->unit, ifp->if_xname);
691 continue;
692 }
693
694 if (ifmr.ifm_status & IFM_AVALID) {
695 if (ifmr.ifm_status & IFM_ACTIVE) {
696 if (p->fec_ifstat == -1 ||
697 p->fec_ifstat == 0) {
698 p->fec_ifstat = 1;
699 printf("fec%d: port %s in bundle "
700 "is up\n", priv->unit,
701 ifp->if_xname);
702 }
703 } else {
704 if (p->fec_ifstat == -1 ||
705 p->fec_ifstat == 1) {
706 p->fec_ifstat = 0;
707 printf("fec%d: port %s in bundle "
708 "is down\n", priv->unit,
709 ifp->if_xname);
710 }
711 }
712 }
713 }
714
715 ifp = priv->ifp;
716 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
717 priv->fec_ch = timeout(ng_fec_tick, priv, hz);
718
719 return;
720}
721
722static int
723ng_fec_ifmedia_upd(struct ifnet *ifp)
724{
725 return(0);
726}
727
728static void ng_fec_ifmedia_sts(struct ifnet *ifp,
729 struct ifmediareq *ifmr)
730{
731 struct ng_fec_private *priv;
732 struct ng_fec_bundle *b;
733 struct ng_fec_portlist *p;
734
735 priv = ifp->if_softc;
736 b = &priv->fec_bundle;
737
738 ifmr->ifm_status = IFM_AVALID;
739 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
740 if (p->fec_ifstat == 1) {
741 ifmr->ifm_status |= IFM_ACTIVE;
742 break;
743 }
744 }
745
746 return;
747}
748
749/*
750 * Process an ioctl for the virtual interface
751 */
752static int
753ng_fec_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
754{
755 struct ifreq *const ifr = (struct ifreq *) data;
756 int s, error = 0;
757 struct ng_fec_private *priv;
758 struct ng_fec_bundle *b;
759
760 priv = ifp->if_softc;
761 b = &priv->fec_bundle;
762
763#ifdef DEBUG
764 ng_fec_print_ioctl(ifp, command, data);
765#endif
766 s = splimp();
767 switch (command) {
768
769 /* These two are mostly handled at a higher layer */
770 case SIOCSIFADDR:
771 case SIOCGIFADDR:
772 error = ether_ioctl(ifp, command, data);
773 break;
774
775 case SIOCSIFMTU:
776 if (ifr->ifr_mtu >= NG_FEC_MTU_MIN &&
777 ifr->ifr_mtu <= NG_FEC_MTU_MAX) {
778 struct ng_fec_portlist *p;
779 struct ifnet *bifp;
780
781 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
782 bifp = p->fec_if;
783 error = (*bifp->if_ioctl)(bifp, SIOCSIFMTU,
784 data);
785 if (error != 0)
786 break;
787 }
788 if (error == 0)
789 ifp->if_mtu = ifr->ifr_mtu;
790 } else
791 error = EINVAL;
792 break;
793
794 /* Set flags */
795 case SIOCSIFFLAGS:
796 /*
797 * If the interface is marked up and stopped, then start it.
798 * If it is marked down and running, then stop it.
799 */
800 if (ifr->ifr_flags & IFF_UP) {
801 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
802 /* Sanity. */
803 if (b->fec_ifcnt != 2 &&
804 b->fec_ifcnt != FEC_BUNDLESIZ) {
805 printf("fec%d: invalid bundle "
806 "size: %d\n", priv->unit,
807 b->fec_ifcnt);
808 error = EINVAL;
809 break;
810 }
811 ng_fec_init(priv);
812 }
813 /*
814 * Bubble down changes in promisc mode to
815 * underlying interfaces.
816 */
817 if ((ifp->if_flags & IFF_PROMISC) !=
818 (priv->if_flags & IFF_PROMISC)) {
819 ng_fec_setport(ifp, command, data);
820 priv->if_flags = ifp->if_flags;
821 }
822 } else {
823 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
824 ng_fec_stop(ifp);
825 }
826 break;
827
828 case SIOCADDMULTI:
829 case SIOCDELMULTI:
830 ng_fec_ether_setmulti(ifp);
831 error = 0;
832 break;
833 case SIOCGIFMEDIA:
834 case SIOCSIFMEDIA:
835 error = ifmedia_ioctl(ifp, ifr, &priv->ifmedia, command);
836 break;
837 /* Stuff that's not supported */
838 case SIOCSIFPHYS:
839 error = EOPNOTSUPP;
840 break;
841
842 default:
843 error = EINVAL;
844 break;
845 }
846 (void) splx(s);
847 return (error);
848}
849
850/*
851 * This routine spies on mbufs received by underlying network device
852 * drivers. When we add an interface to our bundle, we override its
853 * if_input routine with a pointer to ng_fec_input(). This means we
854 * get to look at all the device's packets before sending them to the
855 * real ether_input() for processing by the stack. Once we verify the
856 * packet comes from an interface that's been aggregated into
857 * our bundle, we fix up the rcvif pointer and increment our
858 * packet counters so that it looks like the frames are actually
859 * coming from us.
860 */
861static void
862ng_fec_input(struct ifnet *ifp, struct mbuf *m0)
863{
864 struct ng_node *node;
865 struct ng_fec_private *priv;
866 struct ng_fec_bundle *b;
867 struct ifnet *bifp;
868 struct ng_fec_portlist *p;
869
870 /* Sanity check */
871 if (ifp == NULL || m0 == NULL)
872 return;
873
874 node = IFP2NG(ifp);
875
876 /* Sanity check part II */
877 if (node == NULL)
878 return;
879
880 priv = NG_NODE_PRIVATE(node);
881 b = &priv->fec_bundle;
882 bifp = priv->ifp;
883
884 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
885 if (p->fec_if == m0->m_pkthdr.rcvif)
886 break;
887 }
888
889 /* Wasn't meant for us; leave this frame alone. */
890 if (p == NULL)
891 return;
892
893 /*
894 * Check for a BPF tap on the underlying interface. This
895 * is mainly a debugging aid: it allows tcpdump-ing of an
896 * individual interface in a bundle to work, which it
897 * otherwise would not. BPF tapping of our own aggregate
898 * interface will occur once we call ether_input().
899 */
900 BPF_MTAP(m0->m_pkthdr.rcvif, m0);
901
902 /* Convince the system that this is our frame. */
903 m0->m_pkthdr.rcvif = bifp;
904
905 /*
906 * Count bytes on an individual interface in a bundle.
907 * The bytes will also be added to the aggregate interface
908 * once we call ether_input().
909 */
910 ifp->if_ibytes += m0->m_pkthdr.len;
911
912 bifp->if_ipackets++;
913 (*bifp->if_input)(bifp, m0);
914
915 return;
916}
917
918/*
919 * Take a quick peek at the packet and see if it's ok for us to use
920 * the inet or inet6 hash methods on it, if they're enabled. We do
921 * this by setting flags in the mbuf header. Once we've made up our
922 * mind what to do, we pass the frame to output vector for further
923 * processing.
924 */
925
926static int
927ng_fec_output(struct ifnet *ifp, struct mbuf *m,
928 struct sockaddr *dst, struct rtentry *rt0)
929{
930 const priv_p priv = (priv_p) ifp->if_softc;
931 struct ng_fec_bundle *b;
932 int error;
933
934 /* Check interface flags */
935 if (!((ifp->if_flags & IFF_UP) &&
936 (ifp->if_drv_flags & IFF_DRV_RUNNING))) {
937 m_freem(m);
938 return (ENETDOWN);
939 }
940
941 b = &priv->fec_bundle;
942
943 switch (b->fec_btype) {
944 case FEC_BTYPE_MAC:
945 m->m_flags |= M_FEC_MAC;
946 break;
947#ifdef INET
948 case FEC_BTYPE_INET:
949 /*
950 * We can't use the INET address port selection
951 * scheme if this isn't an INET packet.
952 */
953 if (dst->sa_family == AF_INET)
954 m->m_flags |= M_FEC_INET;
955#ifdef INET6
956 else if (dst->sa_family == AF_INET6)
957 m->m_flags |= M_FEC_INET6;
958#endif
959 else {
960#ifdef DEBUG
961 if_printf(ifp, "can't do inet aggregation of non "
962 "inet packet\n");
963#endif
964 m->m_flags |= M_FEC_MAC;
965 }
966 break;
967#endif
968 default:
969 if_printf(ifp, "bogus hash type: %d\n",
970 b->fec_btype);
971 m_freem(m);
972 return(EINVAL);
973 break;
974 }
975
976 /*
977 * Pass the frame to the output vector for all the protocol
978 * handling. This will put the ethernet header on the packet
979 * for us.
980 */
981 priv->if_error = 0;
982 error = (*b->fec_if_output)(ifp, m, dst, rt0);
983 if (priv->if_error && !error)
984 error = priv->if_error;
985
986 return(error);
987}
988
989/*
990 * Apply a hash to the source and destination addresses in the packet
991 * in order to select an interface. Also check link status and handle
992 * dead links accordingly.
993 */
994
995static int
996ng_fec_choose_port(struct ng_fec_bundle *b,
997 struct mbuf *m, struct ifnet **ifp)
998{
999 struct ether_header *eh;
1000 struct mbuf *m0;
1001#ifdef INET
1002 struct ip *ip;
1003#ifdef INET6
1004 struct ip6_hdr *ip6;
1005#endif
1006#endif
1007
1008 struct ng_fec_portlist *p;
1009 int port = 0, mask;
1010
1011 /*
1012 * If there are only two ports, mask off all but the
1013 * last bit for XORing. If there are 4, mask off all
1014 * but the last 2 bits.
1015 */
1016 mask = b->fec_ifcnt == 2 ? 0x1 : 0x3;
1017 eh = mtod(m, struct ether_header *);
1018#ifdef INET
1019 ip = (struct ip *)(mtod(m, char *) +
1020 sizeof(struct ether_header));
1021#ifdef INET6
1022 ip6 = (struct ip6_hdr *)(mtod(m, char *) +
1023 sizeof(struct ether_header));
1024#endif
1025#endif
1026
1027 /*
1028 * The fg_fec_output() routine is supposed to leave a
1029 * flag for us in the mbuf that tells us what hash to
1030 * use, but sometimes a new mbuf is prepended to the
1031 * chain, so we have to search every mbuf in the chain
1032 * to find the flags.
1033 */
1034 m0 = m;
1035 while (m0) {
1036 if (m0->m_flags & (M_FEC_MAC|M_FEC_INET|M_FEC_INET6))
1037 break;
1038 m0 = m0->m_next;
1039 }
1040 if (m0 == NULL)
1041 return(EINVAL);
1042
1043 switch (m0->m_flags & (M_FEC_MAC|M_FEC_INET|M_FEC_INET6)) {
1044 case M_FEC_MAC:
1045 port = (eh->ether_dhost[5] ^
1046 eh->ether_shost[5]) & mask;
1047 break;
1048#ifdef INET
1049 case M_FEC_INET:
1050 port = (ntohl(ip->ip_dst.s_addr) ^
1051 ntohl(ip->ip_src.s_addr)) & mask;
1052 break;
1053#ifdef INET6
1054 case M_FEC_INET6:
1055 port = (ip6->ip6_dst.s6_addr[15] ^
1056 ip6->ip6_dst.s6_addr[15]) & mask;
1057 break;
1058#endif
1059#endif
1060 default:
1061 return(EINVAL);
1062 break;
1063 }
1064
1065 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
1066 if (port == p->fec_idx)
1067 break;
1068 }
1069
1070 /*
1071 * Now that we've chosen a port, make sure it's
1072 * alive. If it's not alive, cycle through the bundle
1073 * looking for a port that is alive. If we don't find
1074 * any, return an error.
1075 */
1076 if (p->fec_ifstat != 1) {
1077 struct ng_fec_portlist *n = NULL;
1078
1079 n = TAILQ_NEXT(p, fec_list);
1080 if (n == NULL)
1081 n = TAILQ_FIRST(&b->ng_fec_ports);
1082 while (n != p) {
1083 if (n->fec_ifstat == 1)
1084 break;
1085 n = TAILQ_NEXT(n, fec_list);
1086 if (n == NULL)
1087 n = TAILQ_FIRST(&b->ng_fec_ports);
1088 }
1089 if (n == p)
1090 return(EAGAIN);
1091 p = n;
1092 }
1093
1094 *ifp = p->fec_if;
1095
1096 return(0);
1097}
1098
1099/*
1100 * Now that the packet has been run through ether_output(), yank it
1101 * off our own send queue and stick it on the queue for the appropriate
1102 * underlying physical interface. Note that if the interface's send
1103 * queue is full, we save an error status in our private netgraph
1104 * space which will eventually be handed up to ng_fec_output(), which
1105 * will return it to the rest of the IP stack. We need to do this
1106 * in order to duplicate the effect of ether_output() returning ENOBUFS
1107 * when it detects that an interface's send queue is full. There's no
1108 * other way to signal the error status from here since the if_start()
1109 * routine is spec'ed to return void.
1110 *
1111 * Once the frame is queued, we call ether_output_frame() to initiate
1112 * transmission.
1113 */
1114static void
1115ng_fec_start(struct ifnet *ifp)
1116{
1117 struct ng_fec_private *priv;
1118 struct ng_fec_bundle *b;
1119 struct ifnet *oifp = NULL;
1120 struct mbuf *m0;
1121 int error;
1122
1123 priv = ifp->if_softc;
1124 b = &priv->fec_bundle;
1125
1126 IF_DEQUEUE(&ifp->if_snd, m0);
1127 if (m0 == NULL)
1128 return;
1129
1130 BPF_MTAP(ifp, m0);
1131
1132 /* Queue up packet on the proper port. */
1133 error = ng_fec_choose_port(b, m0, &oifp);
1134 if (error) {
1135 ifp->if_ierrors++;
1136 m_freem(m0);
1137 priv->if_error = ENOBUFS;
1138 return;
1139 }
1140 ifp->if_opackets++;
1141
1142 priv->if_error = IF_HANDOFF(&oifp->if_snd, m0, oifp) ? 0 : ENOBUFS;
1143
1144 return;
1145}
1146
1147#ifdef DEBUG
1148/*
1149 * Display an ioctl to the virtual interface
1150 */
1151
1152static void
1153ng_fec_print_ioctl(struct ifnet *ifp, int command, caddr_t data)
1154{
1155 char *str;
1156
1157 switch (command & IOC_DIRMASK) {
1158 case IOC_VOID:
1159 str = "IO";
1160 break;
1161 case IOC_OUT:
1162 str = "IOR";
1163 break;
1164 case IOC_IN:
1165 str = "IOW";
1166 break;
1167 case IOC_INOUT:
1168 str = "IORW";
1169 break;
1170 default:
1171 str = "IO??";
1172 }
1173 log(LOG_DEBUG, "%s: %s('%c', %d, char[%d])\n",
1174 ifp->if_xname,
1175 str,
1176 IOCGROUP(command),
1177 command & 0xff,
1178 IOCPARM_LEN(command));
1179}
1180#endif /* DEBUG */
1181
1182/************************************************************************
1183 NETGRAPH NODE STUFF
1184 ************************************************************************/
1185
1186/*
1187 * Constructor for a node
1188 */
1189static int
1190ng_fec_constructor(node_p node)
1191{
1192 char ifname[NG_FEC_FEC_NAME_MAX + 1];
1193 struct ifnet *ifp;
1194 priv_p priv;
1195 const uint8_t eaddr[ETHER_ADDR_LEN] = {0, 0, 0, 0, 0, 0};
1196 struct ng_fec_bundle *b;
1197 int error = 0;
1198
1199 /* Allocate node and interface private structures */
fc025606
SW
1200 priv = kmalloc(sizeof(*priv), M_NETGRAPH,
1201 M_WAITOK | M_NULLOK | M_ZERO);
b06ebda0
MD
1202 if (priv == NULL)
1203 return (ENOMEM);
1204
1205 ifp = priv->ifp = if_alloc(IFT_ETHER);
1206 if (ifp == NULL) {
fc025606 1207 kfree(priv, M_NETGRAPH);
b06ebda0
MD
1208 return (ENOSPC);
1209 }
1210 b = &priv->fec_bundle;
1211
1212 /* Link them together */
1213 ifp->if_softc = priv;
1214
1215 /* Get an interface unit number */
1216 if ((error = ng_fec_get_unit(&priv->unit)) != 0) {
1217 if_free(ifp);
fc025606 1218 kfree(priv, M_NETGRAPH);
b06ebda0
MD
1219 return (error);
1220 }
1221
1222 /* Link together node and private info */
1223 NG_NODE_SET_PRIVATE(node, priv);
1224 priv->node = node;
1225
1226 /* Initialize interface structure */
1227 if_initname(ifp, NG_FEC_FEC_NAME, priv->unit);
1228 ifp->if_start = ng_fec_start;
1229 ifp->if_ioctl = ng_fec_ioctl;
1230 ifp->if_init = ng_fec_init;
1231 ifp->if_watchdog = NULL;
1232 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
1233 ifp->if_mtu = NG_FEC_MTU_DEFAULT;
1234 ifp->if_flags = (IFF_SIMPLEX|IFF_BROADCAST|IFF_MULTICAST);
1235 ifp->if_addrlen = 0; /* XXX */
1236 ifp->if_hdrlen = 0; /* XXX */
1237 ifp->if_baudrate = 100000000; /* XXX */
1238 TAILQ_INIT(&ifp->if_addrhead); /* XXX useless - done in if_attach */
1239
1240 /* Give this node the same name as the interface (if possible) */
1241 bzero(ifname, sizeof(ifname));
1242 strlcpy(ifname, ifp->if_xname, sizeof(ifname));
1243 if (ng_name_node(node, ifname) != 0)
1244 log(LOG_WARNING, "%s: can't acquire netgraph name\n", ifname);
1245
1246 /* Attach the interface */
1247 ether_ifattach(ifp, eaddr);
1248 callout_handle_init(&priv->fec_ch);
1249
1250 /* Override output method with our own */
1251 ifp->if_output = ng_fec_output;
1252
1253 TAILQ_INIT(&b->ng_fec_ports);
1254 b->fec_ifcnt = 0;
1255
1256 ifmedia_init(&priv->ifmedia, 0,
1257 ng_fec_ifmedia_upd, ng_fec_ifmedia_sts);
1258 ifmedia_add(&priv->ifmedia, IFM_ETHER|IFM_NONE, 0, NULL);
1259 ifmedia_set(&priv->ifmedia, IFM_ETHER|IFM_NONE);
1260
1261 /* Done */
1262 return (0);
1263}
1264
1265/*
1266 * Receive a control message
1267 */
1268static int
1269ng_fec_rcvmsg(node_p node, item_p item, hook_p lasthook)
1270{
1271 const priv_p priv = NG_NODE_PRIVATE(node);
1272 struct ng_fec_bundle *b;
1273 struct ng_mesg *resp = NULL;
1274 struct ng_mesg *msg;
1275 char *ifname;
1276 int error = 0;
1277
1278 NGI_GET_MSG(item, msg);
1279 b = &priv->fec_bundle;
1280
1281 switch (msg->header.typecookie) {
1282 case NGM_FEC_COOKIE:
1283 switch (msg->header.cmd) {
1284 case NGM_FEC_ADD_IFACE:
1285 ifname = msg->data;
1286 error = ng_fec_addport(priv, ifname);
1287 break;
1288 case NGM_FEC_DEL_IFACE:
1289 ifname = msg->data;
1290 error = ng_fec_delport(priv, ifname);
1291 break;
1292 case NGM_FEC_SET_MODE_MAC:
1293 b->fec_btype = FEC_BTYPE_MAC;
1294 break;
1295#ifdef INET
1296 case NGM_FEC_SET_MODE_INET:
1297 b->fec_btype = FEC_BTYPE_INET;
1298 break;
1299#ifdef INET6
1300 case NGM_FEC_SET_MODE_INET6:
1301 b->fec_btype = FEC_BTYPE_INET6;
1302 break;
1303#endif
1304#endif
1305 default:
1306 error = EINVAL;
1307 break;
1308 }
1309 break;
1310 default:
1311 error = EINVAL;
1312 break;
1313 }
1314 NG_RESPOND_MSG(error, node, item, resp);
1315 NG_FREE_MSG(msg);
1316 return (error);
1317}
1318
1319/*
1320 * Shutdown and remove the node and its associated interface.
1321 */
1322static int
1323ng_fec_shutdown(node_p node)
1324{
1325 const priv_p priv = NG_NODE_PRIVATE(node);
1326 struct ng_fec_bundle *b;
1327 struct ng_fec_portlist *p;
1328
1329 b = &priv->fec_bundle;
1330 ng_fec_stop(priv->ifp);
1331
1332 while (!TAILQ_EMPTY(&b->ng_fec_ports)) {
1333 p = TAILQ_FIRST(&b->ng_fec_ports);
1334 ng_fec_ether_cmdmulti(priv->ifp, p, 0);
1335 ng_fec_delport(priv, p->fec_if->if_xname);
1336 }
1337
1338 ether_ifdetach(priv->ifp);
1339 if_free_type(priv->ifp, IFT_ETHER);
1340 ifmedia_removeall(&priv->ifmedia);
1341 ng_fec_free_unit(priv->unit);
fc025606 1342 kfree(priv, M_NETGRAPH);
b06ebda0
MD
1343 NG_NODE_SET_PRIVATE(node, NULL);
1344 NG_NODE_UNREF(node);
1345 return (0);
1346}
1347
1348/*
1349 * Handle loading and unloading for this node type.
1350 */
1351static int
1352ng_fec_mod_event(module_t mod, int event, void *data)
1353{
1354 int error = 0;
1355
1356 switch (event) {
1357 case MOD_LOAD:
1358 mtx_init(&ng_fec_mtx, "ng_fec", NULL, MTX_DEF);
1359 break;
1360 case MOD_UNLOAD:
1361 mtx_destroy(&ng_fec_mtx);
1362 break;
1363 default:
1364 error = EOPNOTSUPP;
1365 break;
1366 }
1367 return (error);
1368}