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 $ 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 MALLOC(newarray, int *, 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 MALLOC(new, struct ng_fec_portlist *, 407 sizeof(struct ng_fec_portlist), M_NETGRAPH, M_NOWAIT); 408 if (new == NULL) 409 return(ENOMEM); 410 411 IF_AFDATA_LOCK(bifp); 412 IFP2NG(bifp) = priv->node; 413 IF_AFDATA_UNLOCK(bifp); 414 415 /* 416 * If this is the first interface added to the bundle, 417 * use its MAC address for the virtual interface (and, 418 * by extension, all the other ports in the bundle). 419 */ 420 if (b->fec_ifcnt == 0) 421 if_setlladdr(ifp, IF_LLADDR(bifp), ETHER_ADDR_LEN); 422 423 b->fec_btype = FEC_BTYPE_MAC; 424 new->fec_idx = b->fec_ifcnt; 425 b->fec_ifcnt++; 426 427 /* Initialise the list of multicast addresses that we own. */ 428 SLIST_INIT(&new->fec_mc_head); 429 430 /* Save the real MAC address. */ 431 bcopy(IF_LLADDR(bifp), 432 (char *)&new->fec_mac, ETHER_ADDR_LEN); 433 434 /* Set up phony MAC address. */ 435 if_setlladdr(bifp, IF_LLADDR(ifp), ETHER_ADDR_LEN); 436 437 /* Save original input vector */ 438 new->fec_if_input = bifp->if_input; 439 440 /* Override it with our own */ 441 bifp->if_input = ng_fec_input; 442 443 /* Save output vector too. */ 444 if (b->fec_if_output == NULL) 445 b->fec_if_output = bifp->if_output; 446 447 /* Add to the queue */ 448 new->fec_if = bifp; 449 new->fec_ifstat = -1; 450 TAILQ_INSERT_TAIL(&b->ng_fec_ports, new, fec_list); 451 452 /* Add multicast addresses to this port. */ 453 ng_fec_ether_cmdmulti(ifp, new, 1); 454 455 return(0); 456 } 457 458 static int 459 ng_fec_delport(struct ng_fec_private *priv, char *iface) 460 { 461 struct ng_fec_bundle *b; 462 struct ifnet *ifp, *bifp; 463 struct ng_fec_portlist *p; 464 465 if (priv == NULL || iface == NULL) 466 return(EINVAL); 467 468 b = &priv->fec_bundle; 469 ifp = priv->ifp; 470 471 /* Only allow reconfiguration if not running. */ 472 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 473 printf("fec%d: can't remove iface; bundle is running\n", 474 priv->unit); 475 return (EINVAL); 476 } 477 478 /* Find the interface */ 479 bifp = ifunit(iface); 480 if (bifp == NULL) { 481 printf("fec%d: tried to remove iface %s, which " 482 "doesn't seem to exist\n", priv->unit, iface); 483 return(ENOENT); 484 } 485 486 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 487 if (p->fec_if == bifp) 488 break; 489 } 490 491 if (p == NULL) { 492 printf("fec%d: tried to remove iface %s which " 493 "is not in our bundle\n", priv->unit, iface); 494 return(EINVAL); 495 } 496 497 /* Stop interface */ 498 bifp->if_flags &= ~IFF_UP; 499 (*bifp->if_ioctl)(bifp, SIOCSIFFLAGS, NULL); 500 501 /* Restore MAC address. */ 502 if_setlladdr(bifp, (u_char *)&p->fec_mac, ETHER_ADDR_LEN); 503 504 /* Restore input vector */ 505 bifp->if_input = p->fec_if_input; 506 507 /* Remove our node context pointer. */ 508 IF_AFDATA_LOCK(bifp); 509 IFP2NG(bifp) = NULL; 510 IF_AFDATA_UNLOCK(bifp); 511 512 /* Delete port */ 513 TAILQ_REMOVE(&b->ng_fec_ports, p, fec_list); 514 FREE(p, M_NETGRAPH); 515 b->fec_ifcnt--; 516 517 if (b->fec_ifcnt == 0) 518 b->fec_if_output = NULL; 519 520 return(0); 521 } 522 523 static int 524 ng_fec_ether_cmdmulti(struct ifnet *trifp, struct ng_fec_portlist *p, int set) 525 { 526 struct ifnet *ifp = p->fec_if; 527 struct ng_fec_mc *mc; 528 struct ifmultiaddr *ifma, *rifma = NULL; 529 struct sockaddr_dl sdl; 530 int error; 531 532 bzero((char *)&sdl, sizeof(sdl)); 533 sdl.sdl_len = sizeof(sdl); 534 sdl.sdl_family = AF_LINK; 535 sdl.sdl_type = IFT_ETHER; 536 sdl.sdl_alen = ETHER_ADDR_LEN; 537 sdl.sdl_index = ifp->if_index; 538 539 if (set) { 540 TAILQ_FOREACH(ifma, &trifp->if_multiaddrs, ifma_link) { 541 if (ifma->ifma_addr->sa_family != AF_LINK) 542 continue; 543 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 544 LLADDR(&sdl), ETHER_ADDR_LEN); 545 546 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma); 547 if (error) 548 return (error); 549 mc = malloc(sizeof(struct ng_fec_mc), M_DEVBUF, M_NOWAIT); 550 if (mc == NULL) 551 return (ENOMEM); 552 mc->mc_ifma = rifma; 553 SLIST_INSERT_HEAD(&p->fec_mc_head, mc, mc_entries); 554 } 555 } else { 556 while ((mc = SLIST_FIRST(&p->fec_mc_head)) != NULL) { 557 SLIST_REMOVE(&p->fec_mc_head, mc, ng_fec_mc, mc_entries); 558 if_delmulti_ifma(mc->mc_ifma); 559 free(mc, M_DEVBUF); 560 } 561 } 562 return (0); 563 } 564 565 static int 566 ng_fec_ether_setmulti(struct ifnet *ifp) 567 { 568 struct ng_fec_private *priv; 569 struct ng_fec_bundle *b; 570 struct ng_fec_portlist *p; 571 572 priv = ifp->if_softc; 573 b = &priv->fec_bundle; 574 575 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 576 /* First, remove any existing filter entries. */ 577 ng_fec_ether_cmdmulti(ifp, p, 0); 578 /* copy all addresses from the fec interface to the port */ 579 ng_fec_ether_cmdmulti(ifp, p, 1); 580 } 581 return (0); 582 } 583 584 /* 585 * Pass an ioctl command down to all the underyling interfaces in a 586 * bundle. Used for setting flags. 587 */ 588 589 static int 590 ng_fec_setport(struct ifnet *ifp, u_long command, caddr_t data) 591 { 592 struct ng_fec_private *priv; 593 struct ng_fec_bundle *b; 594 struct ifnet *oifp; 595 struct ng_fec_portlist *p; 596 597 priv = ifp->if_softc; 598 b = &priv->fec_bundle; 599 600 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 601 oifp = p->fec_if; 602 if (oifp != NULL) 603 (*oifp->if_ioctl)(oifp, command, data); 604 } 605 606 return(0); 607 } 608 609 static void 610 ng_fec_init(void *arg) 611 { 612 struct ng_fec_private *priv; 613 struct ng_fec_bundle *b; 614 struct ifnet *ifp, *bifp; 615 struct ng_fec_portlist *p; 616 617 priv = arg; 618 ifp = priv->ifp; 619 b = &priv->fec_bundle; 620 621 if (b->fec_ifcnt != 2 && b->fec_ifcnt != FEC_BUNDLESIZ) { 622 printf("fec%d: invalid bundle " 623 "size: %d\n", priv->unit, 624 b->fec_ifcnt); 625 return; 626 } 627 628 ng_fec_stop(ifp); 629 630 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 631 bifp = p->fec_if; 632 bifp->if_flags |= IFF_UP; 633 (*bifp->if_ioctl)(bifp, SIOCSIFFLAGS, NULL); 634 /* mark iface as up and let the monitor check it */ 635 p->fec_ifstat = -1; 636 } 637 638 ifp->if_drv_flags &= ~(IFF_DRV_OACTIVE); 639 ifp->if_drv_flags |= IFF_DRV_RUNNING; 640 641 priv->fec_ch = timeout(ng_fec_tick, priv, hz); 642 643 return; 644 } 645 646 static void 647 ng_fec_stop(struct ifnet *ifp) 648 { 649 struct ng_fec_private *priv; 650 struct ng_fec_bundle *b; 651 struct ifnet *bifp; 652 struct ng_fec_portlist *p; 653 654 priv = ifp->if_softc; 655 b = &priv->fec_bundle; 656 657 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 658 bifp = p->fec_if; 659 bifp->if_flags &= ~IFF_UP; 660 (*bifp->if_ioctl)(bifp, SIOCSIFFLAGS, NULL); 661 } 662 663 untimeout(ng_fec_tick, priv, priv->fec_ch); 664 665 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); 666 667 return; 668 } 669 670 static void 671 ng_fec_tick(void *arg) 672 { 673 struct ng_fec_private *priv; 674 struct ng_fec_bundle *b; 675 struct ifmediareq ifmr; 676 struct ifnet *ifp; 677 struct ng_fec_portlist *p; 678 int error = 0; 679 680 priv = arg; 681 b = &priv->fec_bundle; 682 683 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 684 bzero((char *)&ifmr, sizeof(ifmr)); 685 ifp = p->fec_if; 686 error = (*ifp->if_ioctl)(ifp, SIOCGIFMEDIA, (caddr_t)&ifmr); 687 if (error) { 688 printf("fec%d: failed to check status " 689 "of link %s\n", priv->unit, ifp->if_xname); 690 continue; 691 } 692 693 if (ifmr.ifm_status & IFM_AVALID) { 694 if (ifmr.ifm_status & IFM_ACTIVE) { 695 if (p->fec_ifstat == -1 || 696 p->fec_ifstat == 0) { 697 p->fec_ifstat = 1; 698 printf("fec%d: port %s in bundle " 699 "is up\n", priv->unit, 700 ifp->if_xname); 701 } 702 } else { 703 if (p->fec_ifstat == -1 || 704 p->fec_ifstat == 1) { 705 p->fec_ifstat = 0; 706 printf("fec%d: port %s in bundle " 707 "is down\n", priv->unit, 708 ifp->if_xname); 709 } 710 } 711 } 712 } 713 714 ifp = priv->ifp; 715 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 716 priv->fec_ch = timeout(ng_fec_tick, priv, hz); 717 718 return; 719 } 720 721 static int 722 ng_fec_ifmedia_upd(struct ifnet *ifp) 723 { 724 return(0); 725 } 726 727 static void ng_fec_ifmedia_sts(struct ifnet *ifp, 728 struct ifmediareq *ifmr) 729 { 730 struct ng_fec_private *priv; 731 struct ng_fec_bundle *b; 732 struct ng_fec_portlist *p; 733 734 priv = ifp->if_softc; 735 b = &priv->fec_bundle; 736 737 ifmr->ifm_status = IFM_AVALID; 738 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 739 if (p->fec_ifstat == 1) { 740 ifmr->ifm_status |= IFM_ACTIVE; 741 break; 742 } 743 } 744 745 return; 746 } 747 748 /* 749 * Process an ioctl for the virtual interface 750 */ 751 static int 752 ng_fec_ioctl(struct ifnet *ifp, u_long command, caddr_t data) 753 { 754 struct ifreq *const ifr = (struct ifreq *) data; 755 int s, error = 0; 756 struct ng_fec_private *priv; 757 struct ng_fec_bundle *b; 758 759 priv = ifp->if_softc; 760 b = &priv->fec_bundle; 761 762 #ifdef DEBUG 763 ng_fec_print_ioctl(ifp, command, data); 764 #endif 765 s = splimp(); 766 switch (command) { 767 768 /* These two are mostly handled at a higher layer */ 769 case SIOCSIFADDR: 770 case SIOCGIFADDR: 771 error = ether_ioctl(ifp, command, data); 772 break; 773 774 case SIOCSIFMTU: 775 if (ifr->ifr_mtu >= NG_FEC_MTU_MIN && 776 ifr->ifr_mtu <= NG_FEC_MTU_MAX) { 777 struct ng_fec_portlist *p; 778 struct ifnet *bifp; 779 780 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 781 bifp = p->fec_if; 782 error = (*bifp->if_ioctl)(bifp, SIOCSIFMTU, 783 data); 784 if (error != 0) 785 break; 786 } 787 if (error == 0) 788 ifp->if_mtu = ifr->ifr_mtu; 789 } else 790 error = EINVAL; 791 break; 792 793 /* Set flags */ 794 case SIOCSIFFLAGS: 795 /* 796 * If the interface is marked up and stopped, then start it. 797 * If it is marked down and running, then stop it. 798 */ 799 if (ifr->ifr_flags & IFF_UP) { 800 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 801 /* Sanity. */ 802 if (b->fec_ifcnt != 2 && 803 b->fec_ifcnt != FEC_BUNDLESIZ) { 804 printf("fec%d: invalid bundle " 805 "size: %d\n", priv->unit, 806 b->fec_ifcnt); 807 error = EINVAL; 808 break; 809 } 810 ng_fec_init(priv); 811 } 812 /* 813 * Bubble down changes in promisc mode to 814 * underlying interfaces. 815 */ 816 if ((ifp->if_flags & IFF_PROMISC) != 817 (priv->if_flags & IFF_PROMISC)) { 818 ng_fec_setport(ifp, command, data); 819 priv->if_flags = ifp->if_flags; 820 } 821 } else { 822 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 823 ng_fec_stop(ifp); 824 } 825 break; 826 827 case SIOCADDMULTI: 828 case SIOCDELMULTI: 829 ng_fec_ether_setmulti(ifp); 830 error = 0; 831 break; 832 case SIOCGIFMEDIA: 833 case SIOCSIFMEDIA: 834 error = ifmedia_ioctl(ifp, ifr, &priv->ifmedia, command); 835 break; 836 /* Stuff that's not supported */ 837 case SIOCSIFPHYS: 838 error = EOPNOTSUPP; 839 break; 840 841 default: 842 error = EINVAL; 843 break; 844 } 845 (void) splx(s); 846 return (error); 847 } 848 849 /* 850 * This routine spies on mbufs received by underlying network device 851 * drivers. When we add an interface to our bundle, we override its 852 * if_input routine with a pointer to ng_fec_input(). This means we 853 * get to look at all the device's packets before sending them to the 854 * real ether_input() for processing by the stack. Once we verify the 855 * packet comes from an interface that's been aggregated into 856 * our bundle, we fix up the rcvif pointer and increment our 857 * packet counters so that it looks like the frames are actually 858 * coming from us. 859 */ 860 static void 861 ng_fec_input(struct ifnet *ifp, struct mbuf *m0) 862 { 863 struct ng_node *node; 864 struct ng_fec_private *priv; 865 struct ng_fec_bundle *b; 866 struct ifnet *bifp; 867 struct ng_fec_portlist *p; 868 869 /* Sanity check */ 870 if (ifp == NULL || m0 == NULL) 871 return; 872 873 node = IFP2NG(ifp); 874 875 /* Sanity check part II */ 876 if (node == NULL) 877 return; 878 879 priv = NG_NODE_PRIVATE(node); 880 b = &priv->fec_bundle; 881 bifp = priv->ifp; 882 883 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 884 if (p->fec_if == m0->m_pkthdr.rcvif) 885 break; 886 } 887 888 /* Wasn't meant for us; leave this frame alone. */ 889 if (p == NULL) 890 return; 891 892 /* 893 * Check for a BPF tap on the underlying interface. This 894 * is mainly a debugging aid: it allows tcpdump-ing of an 895 * individual interface in a bundle to work, which it 896 * otherwise would not. BPF tapping of our own aggregate 897 * interface will occur once we call ether_input(). 898 */ 899 BPF_MTAP(m0->m_pkthdr.rcvif, m0); 900 901 /* Convince the system that this is our frame. */ 902 m0->m_pkthdr.rcvif = bifp; 903 904 /* 905 * Count bytes on an individual interface in a bundle. 906 * The bytes will also be added to the aggregate interface 907 * once we call ether_input(). 908 */ 909 ifp->if_ibytes += m0->m_pkthdr.len; 910 911 bifp->if_ipackets++; 912 (*bifp->if_input)(bifp, m0); 913 914 return; 915 } 916 917 /* 918 * Take a quick peek at the packet and see if it's ok for us to use 919 * the inet or inet6 hash methods on it, if they're enabled. We do 920 * this by setting flags in the mbuf header. Once we've made up our 921 * mind what to do, we pass the frame to output vector for further 922 * processing. 923 */ 924 925 static int 926 ng_fec_output(struct ifnet *ifp, struct mbuf *m, 927 struct sockaddr *dst, struct rtentry *rt0) 928 { 929 const priv_p priv = (priv_p) ifp->if_softc; 930 struct ng_fec_bundle *b; 931 int error; 932 933 /* Check interface flags */ 934 if (!((ifp->if_flags & IFF_UP) && 935 (ifp->if_drv_flags & IFF_DRV_RUNNING))) { 936 m_freem(m); 937 return (ENETDOWN); 938 } 939 940 b = &priv->fec_bundle; 941 942 switch (b->fec_btype) { 943 case FEC_BTYPE_MAC: 944 m->m_flags |= M_FEC_MAC; 945 break; 946 #ifdef INET 947 case FEC_BTYPE_INET: 948 /* 949 * We can't use the INET address port selection 950 * scheme if this isn't an INET packet. 951 */ 952 if (dst->sa_family == AF_INET) 953 m->m_flags |= M_FEC_INET; 954 #ifdef INET6 955 else if (dst->sa_family == AF_INET6) 956 m->m_flags |= M_FEC_INET6; 957 #endif 958 else { 959 #ifdef DEBUG 960 if_printf(ifp, "can't do inet aggregation of non " 961 "inet packet\n"); 962 #endif 963 m->m_flags |= M_FEC_MAC; 964 } 965 break; 966 #endif 967 default: 968 if_printf(ifp, "bogus hash type: %d\n", 969 b->fec_btype); 970 m_freem(m); 971 return(EINVAL); 972 break; 973 } 974 975 /* 976 * Pass the frame to the output vector for all the protocol 977 * handling. This will put the ethernet header on the packet 978 * for us. 979 */ 980 priv->if_error = 0; 981 error = (*b->fec_if_output)(ifp, m, dst, rt0); 982 if (priv->if_error && !error) 983 error = priv->if_error; 984 985 return(error); 986 } 987 988 /* 989 * Apply a hash to the source and destination addresses in the packet 990 * in order to select an interface. Also check link status and handle 991 * dead links accordingly. 992 */ 993 994 static int 995 ng_fec_choose_port(struct ng_fec_bundle *b, 996 struct mbuf *m, struct ifnet **ifp) 997 { 998 struct ether_header *eh; 999 struct mbuf *m0; 1000 #ifdef INET 1001 struct ip *ip; 1002 #ifdef INET6 1003 struct ip6_hdr *ip6; 1004 #endif 1005 #endif 1006 1007 struct ng_fec_portlist *p; 1008 int port = 0, mask; 1009 1010 /* 1011 * If there are only two ports, mask off all but the 1012 * last bit for XORing. If there are 4, mask off all 1013 * but the last 2 bits. 1014 */ 1015 mask = b->fec_ifcnt == 2 ? 0x1 : 0x3; 1016 eh = mtod(m, struct ether_header *); 1017 #ifdef INET 1018 ip = (struct ip *)(mtod(m, char *) + 1019 sizeof(struct ether_header)); 1020 #ifdef INET6 1021 ip6 = (struct ip6_hdr *)(mtod(m, char *) + 1022 sizeof(struct ether_header)); 1023 #endif 1024 #endif 1025 1026 /* 1027 * The fg_fec_output() routine is supposed to leave a 1028 * flag for us in the mbuf that tells us what hash to 1029 * use, but sometimes a new mbuf is prepended to the 1030 * chain, so we have to search every mbuf in the chain 1031 * to find the flags. 1032 */ 1033 m0 = m; 1034 while (m0) { 1035 if (m0->m_flags & (M_FEC_MAC|M_FEC_INET|M_FEC_INET6)) 1036 break; 1037 m0 = m0->m_next; 1038 } 1039 if (m0 == NULL) 1040 return(EINVAL); 1041 1042 switch (m0->m_flags & (M_FEC_MAC|M_FEC_INET|M_FEC_INET6)) { 1043 case M_FEC_MAC: 1044 port = (eh->ether_dhost[5] ^ 1045 eh->ether_shost[5]) & mask; 1046 break; 1047 #ifdef INET 1048 case M_FEC_INET: 1049 port = (ntohl(ip->ip_dst.s_addr) ^ 1050 ntohl(ip->ip_src.s_addr)) & mask; 1051 break; 1052 #ifdef INET6 1053 case M_FEC_INET6: 1054 port = (ip6->ip6_dst.s6_addr[15] ^ 1055 ip6->ip6_dst.s6_addr[15]) & mask; 1056 break; 1057 #endif 1058 #endif 1059 default: 1060 return(EINVAL); 1061 break; 1062 } 1063 1064 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 1065 if (port == p->fec_idx) 1066 break; 1067 } 1068 1069 /* 1070 * Now that we've chosen a port, make sure it's 1071 * alive. If it's not alive, cycle through the bundle 1072 * looking for a port that is alive. If we don't find 1073 * any, return an error. 1074 */ 1075 if (p->fec_ifstat != 1) { 1076 struct ng_fec_portlist *n = NULL; 1077 1078 n = TAILQ_NEXT(p, fec_list); 1079 if (n == NULL) 1080 n = TAILQ_FIRST(&b->ng_fec_ports); 1081 while (n != p) { 1082 if (n->fec_ifstat == 1) 1083 break; 1084 n = TAILQ_NEXT(n, fec_list); 1085 if (n == NULL) 1086 n = TAILQ_FIRST(&b->ng_fec_ports); 1087 } 1088 if (n == p) 1089 return(EAGAIN); 1090 p = n; 1091 } 1092 1093 *ifp = p->fec_if; 1094 1095 return(0); 1096 } 1097 1098 /* 1099 * Now that the packet has been run through ether_output(), yank it 1100 * off our own send queue and stick it on the queue for the appropriate 1101 * underlying physical interface. Note that if the interface's send 1102 * queue is full, we save an error status in our private netgraph 1103 * space which will eventually be handed up to ng_fec_output(), which 1104 * will return it to the rest of the IP stack. We need to do this 1105 * in order to duplicate the effect of ether_output() returning ENOBUFS 1106 * when it detects that an interface's send queue is full. There's no 1107 * other way to signal the error status from here since the if_start() 1108 * routine is spec'ed to return void. 1109 * 1110 * Once the frame is queued, we call ether_output_frame() to initiate 1111 * transmission. 1112 */ 1113 static void 1114 ng_fec_start(struct ifnet *ifp) 1115 { 1116 struct ng_fec_private *priv; 1117 struct ng_fec_bundle *b; 1118 struct ifnet *oifp = NULL; 1119 struct mbuf *m0; 1120 int error; 1121 1122 priv = ifp->if_softc; 1123 b = &priv->fec_bundle; 1124 1125 IF_DEQUEUE(&ifp->if_snd, m0); 1126 if (m0 == NULL) 1127 return; 1128 1129 BPF_MTAP(ifp, m0); 1130 1131 /* Queue up packet on the proper port. */ 1132 error = ng_fec_choose_port(b, m0, &oifp); 1133 if (error) { 1134 ifp->if_ierrors++; 1135 m_freem(m0); 1136 priv->if_error = ENOBUFS; 1137 return; 1138 } 1139 ifp->if_opackets++; 1140 1141 priv->if_error = IF_HANDOFF(&oifp->if_snd, m0, oifp) ? 0 : ENOBUFS; 1142 1143 return; 1144 } 1145 1146 #ifdef DEBUG 1147 /* 1148 * Display an ioctl to the virtual interface 1149 */ 1150 1151 static void 1152 ng_fec_print_ioctl(struct ifnet *ifp, int command, caddr_t data) 1153 { 1154 char *str; 1155 1156 switch (command & IOC_DIRMASK) { 1157 case IOC_VOID: 1158 str = "IO"; 1159 break; 1160 case IOC_OUT: 1161 str = "IOR"; 1162 break; 1163 case IOC_IN: 1164 str = "IOW"; 1165 break; 1166 case IOC_INOUT: 1167 str = "IORW"; 1168 break; 1169 default: 1170 str = "IO??"; 1171 } 1172 log(LOG_DEBUG, "%s: %s('%c', %d, char[%d])\n", 1173 ifp->if_xname, 1174 str, 1175 IOCGROUP(command), 1176 command & 0xff, 1177 IOCPARM_LEN(command)); 1178 } 1179 #endif /* DEBUG */ 1180 1181 /************************************************************************ 1182 NETGRAPH NODE STUFF 1183 ************************************************************************/ 1184 1185 /* 1186 * Constructor for a node 1187 */ 1188 static int 1189 ng_fec_constructor(node_p node) 1190 { 1191 char ifname[NG_FEC_FEC_NAME_MAX + 1]; 1192 struct ifnet *ifp; 1193 priv_p priv; 1194 const uint8_t eaddr[ETHER_ADDR_LEN] = {0, 0, 0, 0, 0, 0}; 1195 struct ng_fec_bundle *b; 1196 int error = 0; 1197 1198 /* Allocate node and interface private structures */ 1199 MALLOC(priv, priv_p, sizeof(*priv), M_NETGRAPH, M_NOWAIT | M_ZERO); 1200 if (priv == NULL) 1201 return (ENOMEM); 1202 1203 ifp = priv->ifp = if_alloc(IFT_ETHER); 1204 if (ifp == NULL) { 1205 FREE(priv, M_NETGRAPH); 1206 return (ENOSPC); 1207 } 1208 b = &priv->fec_bundle; 1209 1210 /* Link them together */ 1211 ifp->if_softc = priv; 1212 1213 /* Get an interface unit number */ 1214 if ((error = ng_fec_get_unit(&priv->unit)) != 0) { 1215 if_free(ifp); 1216 FREE(priv, M_NETGRAPH); 1217 return (error); 1218 } 1219 1220 /* Link together node and private info */ 1221 NG_NODE_SET_PRIVATE(node, priv); 1222 priv->node = node; 1223 1224 /* Initialize interface structure */ 1225 if_initname(ifp, NG_FEC_FEC_NAME, priv->unit); 1226 ifp->if_start = ng_fec_start; 1227 ifp->if_ioctl = ng_fec_ioctl; 1228 ifp->if_init = ng_fec_init; 1229 ifp->if_watchdog = NULL; 1230 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; 1231 ifp->if_mtu = NG_FEC_MTU_DEFAULT; 1232 ifp->if_flags = (IFF_SIMPLEX|IFF_BROADCAST|IFF_MULTICAST); 1233 ifp->if_addrlen = 0; /* XXX */ 1234 ifp->if_hdrlen = 0; /* XXX */ 1235 ifp->if_baudrate = 100000000; /* XXX */ 1236 TAILQ_INIT(&ifp->if_addrhead); /* XXX useless - done in if_attach */ 1237 1238 /* Give this node the same name as the interface (if possible) */ 1239 bzero(ifname, sizeof(ifname)); 1240 strlcpy(ifname, ifp->if_xname, sizeof(ifname)); 1241 if (ng_name_node(node, ifname) != 0) 1242 log(LOG_WARNING, "%s: can't acquire netgraph name\n", ifname); 1243 1244 /* Attach the interface */ 1245 ether_ifattach(ifp, eaddr); 1246 callout_handle_init(&priv->fec_ch); 1247 1248 /* Override output method with our own */ 1249 ifp->if_output = ng_fec_output; 1250 1251 TAILQ_INIT(&b->ng_fec_ports); 1252 b->fec_ifcnt = 0; 1253 1254 ifmedia_init(&priv->ifmedia, 0, 1255 ng_fec_ifmedia_upd, ng_fec_ifmedia_sts); 1256 ifmedia_add(&priv->ifmedia, IFM_ETHER|IFM_NONE, 0, NULL); 1257 ifmedia_set(&priv->ifmedia, IFM_ETHER|IFM_NONE); 1258 1259 /* Done */ 1260 return (0); 1261 } 1262 1263 /* 1264 * Receive a control message 1265 */ 1266 static int 1267 ng_fec_rcvmsg(node_p node, item_p item, hook_p lasthook) 1268 { 1269 const priv_p priv = NG_NODE_PRIVATE(node); 1270 struct ng_fec_bundle *b; 1271 struct ng_mesg *resp = NULL; 1272 struct ng_mesg *msg; 1273 char *ifname; 1274 int error = 0; 1275 1276 NGI_GET_MSG(item, msg); 1277 b = &priv->fec_bundle; 1278 1279 switch (msg->header.typecookie) { 1280 case NGM_FEC_COOKIE: 1281 switch (msg->header.cmd) { 1282 case NGM_FEC_ADD_IFACE: 1283 ifname = msg->data; 1284 error = ng_fec_addport(priv, ifname); 1285 break; 1286 case NGM_FEC_DEL_IFACE: 1287 ifname = msg->data; 1288 error = ng_fec_delport(priv, ifname); 1289 break; 1290 case NGM_FEC_SET_MODE_MAC: 1291 b->fec_btype = FEC_BTYPE_MAC; 1292 break; 1293 #ifdef INET 1294 case NGM_FEC_SET_MODE_INET: 1295 b->fec_btype = FEC_BTYPE_INET; 1296 break; 1297 #ifdef INET6 1298 case NGM_FEC_SET_MODE_INET6: 1299 b->fec_btype = FEC_BTYPE_INET6; 1300 break; 1301 #endif 1302 #endif 1303 default: 1304 error = EINVAL; 1305 break; 1306 } 1307 break; 1308 default: 1309 error = EINVAL; 1310 break; 1311 } 1312 NG_RESPOND_MSG(error, node, item, resp); 1313 NG_FREE_MSG(msg); 1314 return (error); 1315 } 1316 1317 /* 1318 * Shutdown and remove the node and its associated interface. 1319 */ 1320 static int 1321 ng_fec_shutdown(node_p node) 1322 { 1323 const priv_p priv = NG_NODE_PRIVATE(node); 1324 struct ng_fec_bundle *b; 1325 struct ng_fec_portlist *p; 1326 1327 b = &priv->fec_bundle; 1328 ng_fec_stop(priv->ifp); 1329 1330 while (!TAILQ_EMPTY(&b->ng_fec_ports)) { 1331 p = TAILQ_FIRST(&b->ng_fec_ports); 1332 ng_fec_ether_cmdmulti(priv->ifp, p, 0); 1333 ng_fec_delport(priv, p->fec_if->if_xname); 1334 } 1335 1336 ether_ifdetach(priv->ifp); 1337 if_free_type(priv->ifp, IFT_ETHER); 1338 ifmedia_removeall(&priv->ifmedia); 1339 ng_fec_free_unit(priv->unit); 1340 FREE(priv, M_NETGRAPH); 1341 NG_NODE_SET_PRIVATE(node, NULL); 1342 NG_NODE_UNREF(node); 1343 return (0); 1344 } 1345 1346 /* 1347 * Handle loading and unloading for this node type. 1348 */ 1349 static int 1350 ng_fec_mod_event(module_t mod, int event, void *data) 1351 { 1352 int error = 0; 1353 1354 switch (event) { 1355 case MOD_LOAD: 1356 mtx_init(&ng_fec_mtx, "ng_fec", NULL, MTX_DEF); 1357 break; 1358 case MOD_UNLOAD: 1359 mtx_destroy(&ng_fec_mtx); 1360 break; 1361 default: 1362 error = EOPNOTSUPP; 1363 break; 1364 } 1365 return (error); 1366 } 1367