1 /* 2 * ng_fec.c 3 * 4 * Copyright (c) 2001 Berkeley Software Design, Inc. 5 * Copyright (c) 2000, 2001 6 * Bill Paul <wpaul@osd.bsdi.com>. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Bill Paul. 19 * 4. Neither the name of the author nor the names of any co-contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD 27 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 33 * THE POSSIBILITY OF SUCH DAMAGE. 34 * 35 * $FreeBSD: src/sys/netgraph/ng_fec.c,v 1.1.2.1 2002/11/01 21:39:31 julian Exp $ 36 * $DragonFly: src/sys/netgraph/fec/ng_fec.c,v 1.3 2003/08/07 21:17:31 dillon Exp $ 37 */ 38 /* 39 * Copyright (c) 1996-1999 Whistle Communications, Inc. 40 * All rights reserved. 41 * 42 * Subject to the following obligations and disclaimer of warranty, use and 43 * redistribution of this software, in source or object code forms, with or 44 * without modifications are expressly permitted by Whistle Communications; 45 * provided, however, that: 46 * 1. Any and all reproductions of the source or object code must include the 47 * copyright notice above and the following disclaimer of warranties; and 48 * 2. No rights are granted, in any manner or form, to use Whistle 49 * Communications, Inc. trademarks, including the mark "WHISTLE 50 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as 51 * such appears in the above copyright notice or in the software. 52 * 53 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND 54 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO 55 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE, 56 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF 57 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. 58 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY 59 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS 60 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE. 61 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES 62 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING 63 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 64 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR 65 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY 66 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 67 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 68 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY 69 * OF SUCH DAMAGE. 70 * 71 * Author: Archie Cobbs <archie@freebsd.org> 72 * 73 * $Whistle: ng_fec.c,v 1.33 1999/11/01 09:24:51 julian Exp $ 74 */ 75 76 /* 77 * This module implements ethernet channel bonding using the Cisco 78 * Fast EtherChannel mechanism. Two or four ports may be combined 79 * into a single aggregate interface. 80 * 81 * Interfaces are named fec0, fec1, etc. New nodes take the 82 * first available interface name. 83 * 84 * This node also includes Berkeley packet filter support. 85 * 86 * Note that this node doesn't need to connect to any other 87 * netgraph nodes in order to do its work. 88 */ 89 90 #include <sys/param.h> 91 #include <sys/systm.h> 92 #include <sys/errno.h> 93 #include <sys/kernel.h> 94 #include <sys/malloc.h> 95 #include <sys/mbuf.h> 96 #include <sys/errno.h> 97 #include <sys/sockio.h> 98 #include <sys/socket.h> 99 #include <sys/syslog.h> 100 #include <sys/libkern.h> 101 #include <sys/queue.h> 102 103 #include <net/if.h> 104 #include <net/if_types.h> 105 #include <net/if_arp.h> 106 #include <net/if_dl.h> 107 #include <net/if_media.h> 108 #include <net/intrq.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 "ng_fec.h" 129 130 #define IFP2NG(ifp) ((struct ng_node *)((struct arpcom *)(ifp))->ac_netgraph) 131 #define FEC_INC(x, y) (x) = (x + 1) % y 132 133 /* 134 * Current fast etherchannel implementations use either 2 or 4 135 * ports, so for now we limit the maximum bundle size to 4 interfaces. 136 */ 137 #define FEC_BUNDLESIZ 4 138 139 struct ng_fec_portlist { 140 struct ifnet *fec_if; 141 int fec_idx; 142 int fec_ifstat; 143 struct ether_addr fec_mac; 144 TAILQ_ENTRY(ng_fec_portlist) fec_list; 145 }; 146 147 struct ng_fec_bundle { 148 TAILQ_HEAD(,ng_fec_portlist) ng_fec_ports; 149 int fec_ifcnt; 150 int fec_btype; 151 }; 152 153 #define FEC_BTYPE_MAC 0x01 154 #define FEC_BTYPE_INET 0x02 155 #define FEC_BTYPE_INET6 0x03 156 157 /* Node private data */ 158 struct ng_fec_private { 159 struct arpcom arpcom; 160 struct ifmedia ifmedia; 161 int if_flags; 162 int if_error; /* XXX */ 163 int unit; /* Interface unit number */ 164 node_p node; /* Our netgraph node */ 165 struct ng_fec_bundle fec_bundle;/* Aggregate bundle */ 166 struct callout_handle fec_ch; /* callout handle for ticker */ 167 }; 168 typedef struct ng_fec_private *priv_p; 169 170 /* Interface methods */ 171 static void ng_fec_input(struct ifnet *, struct mbuf **, 172 struct ether_header *); 173 static void ng_fec_start(struct ifnet *ifp); 174 static int ng_fec_choose_port(struct ng_fec_bundle *b, 175 struct mbuf *m, struct ifnet **ifp); 176 static int ng_fec_setport(struct ifnet *ifp, u_long cmd, caddr_t data); 177 static void ng_fec_init(void *arg); 178 static void ng_fec_stop(struct ifnet *ifp); 179 static int ng_fec_ifmedia_upd(struct ifnet *ifp); 180 static void ng_fec_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr); 181 static int ng_fec_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data); 182 static int ng_fec_output(struct ifnet *ifp, struct mbuf *m0, 183 struct sockaddr *dst, struct rtentry *rt0); 184 static void ng_fec_tick(void *arg); 185 static int ng_fec_addport(struct ng_fec_private *priv, char *iface); 186 static int ng_fec_delport(struct ng_fec_private *priv, char *iface); 187 188 #ifdef DEBUG 189 static void ng_fec_print_ioctl(struct ifnet *ifp, int cmd, caddr_t data); 190 #endif 191 192 /* Netgraph methods */ 193 static ng_constructor_t ng_fec_constructor; 194 static ng_rcvmsg_t ng_fec_rcvmsg; 195 static ng_shutdown_t ng_fec_rmnode; 196 197 /* List of commands and how to convert arguments to/from ASCII */ 198 static const struct ng_cmdlist ng_fec_cmds[] = { 199 { 200 NGM_FEC_COOKIE, 201 NGM_FEC_ADD_IFACE, 202 "add_iface", 203 &ng_parse_string_type, 204 NULL, 205 }, 206 { 207 NGM_FEC_COOKIE, 208 NGM_FEC_DEL_IFACE, 209 "del_iface", 210 &ng_parse_string_type, 211 NULL, 212 }, 213 { 214 NGM_FEC_COOKIE, 215 NGM_FEC_SET_MODE_MAC, 216 "set_mode_mac", 217 NULL, 218 NULL, 219 }, 220 { 221 NGM_FEC_COOKIE, 222 NGM_FEC_SET_MODE_INET, 223 "set_mode_inet", 224 NULL, 225 NULL, 226 }, 227 { 0 } 228 }; 229 230 /* Node type descriptor */ 231 static struct ng_type typestruct = { 232 NG_VERSION, 233 NG_FEC_NODE_TYPE, 234 NULL, 235 ng_fec_constructor, 236 ng_fec_rcvmsg, 237 ng_fec_rmnode, 238 NULL, 239 NULL, 240 NULL, 241 NULL, 242 NULL, 243 NULL, 244 ng_fec_cmds 245 }; 246 NETGRAPH_INIT(fec, &typestruct); 247 248 /* We keep a bitmap indicating which unit numbers are free. 249 One means the unit number is free, zero means it's taken. */ 250 static int *ng_fec_units = NULL; 251 static int ng_fec_units_len = 0; 252 static int ng_units_in_use = 0; 253 254 #define UNITS_BITSPERWORD (sizeof(*ng_fec_units) * NBBY) 255 256 /* 257 * Find the first free unit number for a new interface. 258 * Increase the size of the unit bitmap as necessary. 259 */ 260 static __inline__ int 261 ng_fec_get_unit(int *unit) 262 { 263 int index, bit; 264 265 for (index = 0; index < ng_fec_units_len 266 && ng_fec_units[index] == 0; index++); 267 if (index == ng_fec_units_len) { /* extend array */ 268 int i, *newarray, newlen; 269 270 newlen = (2 * ng_fec_units_len) + 4; 271 MALLOC(newarray, int *, newlen * sizeof(*ng_fec_units), 272 M_NETGRAPH, M_NOWAIT); 273 if (newarray == NULL) 274 return (ENOMEM); 275 bcopy(ng_fec_units, newarray, 276 ng_fec_units_len * sizeof(*ng_fec_units)); 277 for (i = ng_fec_units_len; i < newlen; i++) 278 newarray[i] = ~0; 279 if (ng_fec_units != NULL) 280 FREE(ng_fec_units, M_NETGRAPH); 281 ng_fec_units = newarray; 282 ng_fec_units_len = newlen; 283 } 284 bit = ffs(ng_fec_units[index]) - 1; 285 KASSERT(bit >= 0 && bit <= UNITS_BITSPERWORD - 1, 286 ("%s: word=%d bit=%d", __FUNCTION__, ng_fec_units[index], bit)); 287 ng_fec_units[index] &= ~(1 << bit); 288 *unit = (index * UNITS_BITSPERWORD) + bit; 289 ng_units_in_use++; 290 return (0); 291 } 292 293 /* 294 * Free a no longer needed unit number. 295 */ 296 static __inline__ void 297 ng_fec_free_unit(int unit) 298 { 299 int index, bit; 300 301 index = unit / UNITS_BITSPERWORD; 302 bit = unit % UNITS_BITSPERWORD; 303 KASSERT(index < ng_fec_units_len, 304 ("%s: unit=%d len=%d", __FUNCTION__, unit, ng_fec_units_len)); 305 KASSERT((ng_fec_units[index] & (1 << bit)) == 0, 306 ("%s: unit=%d is free", __FUNCTION__, unit)); 307 ng_fec_units[index] |= (1 << bit); 308 /* 309 * XXX We could think about reducing the size of ng_fec_units[] 310 * XXX here if the last portion is all ones 311 * XXX At least free it if no more units. 312 * Needed if we are eventually be able to unload. 313 */ 314 ng_units_in_use++; 315 if (ng_units_in_use == 0) { /* XXX make SMP safe */ 316 FREE(ng_fec_units, M_NETGRAPH); 317 ng_fec_units_len = 0; 318 ng_fec_units = NULL; 319 } 320 } 321 322 /************************************************************************ 323 INTERFACE STUFF 324 ************************************************************************/ 325 326 static int 327 ng_fec_addport(struct ng_fec_private *priv, char *iface) 328 { 329 struct ng_fec_bundle *b; 330 struct ifnet *ifp, *bifp; 331 struct arpcom *ac; 332 struct ifaddr *ifa; 333 struct sockaddr_dl *sdl; 334 struct ng_fec_portlist *p, *new; 335 336 if (priv == NULL || iface == NULL) 337 return(EINVAL); 338 339 b = &priv->fec_bundle; 340 ifp = &priv->arpcom.ac_if; 341 342 /* Find the interface */ 343 bifp = ifunit(iface); 344 if (bifp == NULL) { 345 printf("fec%d: tried to add iface %s, which " 346 "doesn't seem to exist\n", priv->unit, iface); 347 return(ENOENT); 348 } 349 350 /* See if we have room in the bundle */ 351 if (b->fec_ifcnt == FEC_BUNDLESIZ) { 352 printf("fec%d: can't add new iface; bundle is full\n", 353 priv->unit); 354 return(ENOSPC); 355 } 356 357 /* See if the interface is already in the bundle */ 358 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 359 if (p->fec_if == bifp) { 360 printf("fec%d: iface %s is already in this " 361 "bundle\n", priv->unit, iface); 362 return(EINVAL); 363 } 364 } 365 366 /* Allocate new list entry. */ 367 MALLOC(new, struct ng_fec_portlist *, 368 sizeof(struct ng_fec_portlist), M_NETGRAPH, M_NOWAIT); 369 if (new == NULL) 370 return(ENOMEM); 371 372 ac = (struct arpcom *)bifp; 373 ac->ac_netgraph = priv->node; 374 375 /* 376 * If this is the first interface added to the bundle, 377 * use its MAC address for the virtual interface (and, 378 * by extension, all the other ports in the bundle). 379 */ 380 if (b->fec_ifcnt == 0) { 381 ifa = ifnet_addrs[ifp->if_index - 1]; 382 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 383 bcopy((char *)ac->ac_enaddr, 384 priv->arpcom.ac_enaddr, ETHER_ADDR_LEN); 385 bcopy((char *)ac->ac_enaddr, 386 LLADDR(sdl), ETHER_ADDR_LEN); 387 } 388 389 b->fec_btype = FEC_BTYPE_MAC; 390 new->fec_idx = b->fec_ifcnt; 391 b->fec_ifcnt++; 392 393 /* Save the real MAC address. */ 394 bcopy((char *)ac->ac_enaddr, 395 (char *)&new->fec_mac, ETHER_ADDR_LEN); 396 397 /* Set up phony MAC address. */ 398 ifa = ifnet_addrs[bifp->if_index - 1]; 399 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 400 bcopy(priv->arpcom.ac_enaddr, ac->ac_enaddr, ETHER_ADDR_LEN); 401 bcopy(priv->arpcom.ac_enaddr, LLADDR(sdl), ETHER_ADDR_LEN); 402 403 /* Add to the queue */ 404 new->fec_if = bifp; 405 TAILQ_INSERT_TAIL(&b->ng_fec_ports, new, fec_list); 406 407 return(0); 408 } 409 410 static int 411 ng_fec_delport(struct ng_fec_private *priv, char *iface) 412 { 413 struct ng_fec_bundle *b; 414 struct ifnet *ifp, *bifp; 415 struct arpcom *ac; 416 struct ifaddr *ifa; 417 struct sockaddr_dl *sdl; 418 struct ng_fec_portlist *p; 419 420 if (priv == NULL || iface == NULL) 421 return(EINVAL); 422 423 b = &priv->fec_bundle; 424 ifp = &priv->arpcom.ac_if; 425 426 /* Find the interface */ 427 bifp = ifunit(iface); 428 if (bifp == NULL) { 429 printf("fec%d: tried to remove iface %s, which " 430 "doesn't seem to exist\n", priv->unit, iface); 431 return(ENOENT); 432 } 433 434 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 435 if (p->fec_if == bifp) 436 break; 437 } 438 439 if (p == NULL) { 440 printf("fec%d: tried to remove iface %s which " 441 "is not in our bundle\n", priv->unit, iface); 442 return(EINVAL); 443 } 444 445 /* Stop interface */ 446 bifp->if_flags &= ~IFF_UP; 447 (*bifp->if_ioctl)(bifp, SIOCSIFFLAGS, NULL); 448 449 /* Restore MAC address. */ 450 ac = (struct arpcom *)bifp; 451 ifa = ifnet_addrs[bifp->if_index - 1]; 452 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 453 bcopy((char *)&p->fec_mac, ac->ac_enaddr, ETHER_ADDR_LEN); 454 bcopy((char *)&p->fec_mac, LLADDR(sdl), ETHER_ADDR_LEN); 455 456 /* Delete port */ 457 TAILQ_REMOVE(&b->ng_fec_ports, p, fec_list); 458 FREE(p, M_NETGRAPH); 459 b->fec_ifcnt--; 460 461 return(0); 462 } 463 464 /* 465 * Pass an ioctl command down to all the underyling interfaces in a 466 * bundle. Used for setting multicast filters and flags. 467 */ 468 469 static int 470 ng_fec_setport(struct ifnet *ifp, u_long command, caddr_t data) 471 { 472 struct ng_fec_private *priv; 473 struct ng_fec_bundle *b; 474 struct ifnet *oifp; 475 struct ng_fec_portlist *p; 476 477 priv = ifp->if_softc; 478 b = &priv->fec_bundle; 479 480 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 481 oifp = p->fec_if; 482 if (oifp != NULL) 483 (*oifp->if_ioctl)(oifp, command, data); 484 } 485 486 return(0); 487 } 488 489 static void 490 ng_fec_init(void *arg) 491 { 492 struct ng_fec_private *priv; 493 struct ng_fec_bundle *b; 494 struct ifnet *ifp, *bifp; 495 struct ng_fec_portlist *p; 496 497 ifp = arg; 498 priv = ifp->if_softc; 499 b = &priv->fec_bundle; 500 501 if (b->fec_ifcnt == 1 || b->fec_ifcnt == 3) { 502 printf("fec%d: invalid bundle " 503 "size: %d\n", priv->unit, 504 b->fec_ifcnt); 505 return; 506 } 507 508 ng_fec_stop(ifp); 509 510 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 511 bifp = p->fec_if; 512 bifp->if_flags |= IFF_UP; 513 (*bifp->if_ioctl)(bifp, SIOCSIFFLAGS, NULL); 514 /* mark iface as up and let the monitor check it */ 515 p->fec_ifstat = -1; 516 } 517 518 priv->fec_ch = timeout(ng_fec_tick, priv, hz); 519 520 return; 521 } 522 523 static void 524 ng_fec_stop(struct ifnet *ifp) 525 { 526 struct ng_fec_private *priv; 527 struct ng_fec_bundle *b; 528 struct ifnet *bifp; 529 struct ng_fec_portlist *p; 530 531 priv = ifp->if_softc; 532 b = &priv->fec_bundle; 533 534 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 535 bifp = p->fec_if; 536 bifp->if_flags &= ~IFF_UP; 537 (*bifp->if_ioctl)(bifp, SIOCSIFFLAGS, NULL); 538 } 539 540 untimeout(ng_fec_tick, priv, priv->fec_ch); 541 542 return; 543 } 544 545 static void 546 ng_fec_tick(void *arg) 547 { 548 struct ng_fec_private *priv; 549 struct ng_fec_bundle *b; 550 struct ifmediareq ifmr; 551 struct ifnet *ifp; 552 struct ng_fec_portlist *p; 553 int error = 0; 554 555 priv = arg; 556 b = &priv->fec_bundle; 557 558 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 559 bzero((char *)&ifmr, sizeof(ifmr)); 560 ifp = p->fec_if; 561 error = (*ifp->if_ioctl)(ifp, SIOCGIFMEDIA, (caddr_t)&ifmr); 562 if (error) { 563 printf("fec%d: failed to check status " 564 "of link %s%d\n", priv->unit, ifp->if_name, 565 ifp->if_unit); 566 continue; 567 } 568 569 if (ifmr.ifm_status & IFM_AVALID && 570 IFM_TYPE(ifmr.ifm_active) == IFM_ETHER) { 571 if (ifmr.ifm_status & IFM_ACTIVE) { 572 if (p->fec_ifstat == -1 || 573 p->fec_ifstat == 0) { 574 p->fec_ifstat = 1; 575 printf("fec%d: port %s%d in bundle " 576 "is up\n", priv->unit, 577 ifp->if_name, ifp->if_unit); 578 } 579 } else { 580 if (p->fec_ifstat == -1 || 581 p->fec_ifstat == 1) { 582 p->fec_ifstat = 0; 583 printf("fec%d: port %s%d in bundle " 584 "is down\n", priv->unit, 585 ifp->if_name, ifp->if_unit); 586 } 587 } 588 } 589 } 590 591 ifp = &priv->arpcom.ac_if; 592 if (ifp->if_flags & IFF_RUNNING) 593 priv->fec_ch = timeout(ng_fec_tick, priv, hz); 594 595 return; 596 } 597 598 static int 599 ng_fec_ifmedia_upd(struct ifnet *ifp) 600 { 601 return(0); 602 } 603 604 static void ng_fec_ifmedia_sts(struct ifnet *ifp, 605 struct ifmediareq *ifmr) 606 { 607 struct ng_fec_private *priv; 608 struct ng_fec_bundle *b; 609 struct ng_fec_portlist *p; 610 611 priv = ifp->if_softc; 612 b = &priv->fec_bundle; 613 614 ifmr->ifm_status = IFM_AVALID; 615 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 616 if (p->fec_ifstat) { 617 ifmr->ifm_status |= IFM_ACTIVE; 618 break; 619 } 620 } 621 622 return; 623 } 624 625 /* 626 * Process an ioctl for the virtual interface 627 */ 628 static int 629 ng_fec_ioctl(struct ifnet *ifp, u_long command, caddr_t data) 630 { 631 struct ifreq *const ifr = (struct ifreq *) data; 632 int s, error = 0; 633 struct ng_fec_private *priv; 634 struct ng_fec_bundle *b; 635 636 priv = ifp->if_softc; 637 b = &priv->fec_bundle; 638 639 #ifdef DEBUG 640 ng_fec_print_ioctl(ifp, command, data); 641 #endif 642 s = splimp(); 643 switch (command) { 644 645 /* These two are mostly handled at a higher layer */ 646 case SIOCSIFADDR: 647 case SIOCGIFADDR: 648 case SIOCSIFMTU: 649 error = ether_ioctl(ifp, command, data); 650 break; 651 652 /* Set flags */ 653 case SIOCSIFFLAGS: 654 /* 655 * If the interface is marked up and stopped, then start it. 656 * If it is marked down and running, then stop it. 657 */ 658 if (ifr->ifr_flags & IFF_UP) { 659 if (!(ifp->if_flags & IFF_RUNNING)) { 660 /* Sanity. */ 661 if (b->fec_ifcnt == 1 || b->fec_ifcnt == 3) { 662 printf("fec%d: invalid bundle " 663 "size: %d\n", priv->unit, 664 b->fec_ifcnt); 665 error = EINVAL; 666 break; 667 } 668 ifp->if_flags &= ~(IFF_OACTIVE); 669 ifp->if_flags |= IFF_RUNNING; 670 ng_fec_init(ifp); 671 } 672 /* 673 * Bubble down changes in promisc mode to 674 * underlying interfaces. 675 */ 676 if ((ifp->if_flags & IFF_PROMISC) != 677 (priv->if_flags & IFF_PROMISC)) { 678 ng_fec_setport(ifp, command, data); 679 priv->if_flags = ifp->if_flags; 680 } 681 } else { 682 if (ifp->if_flags & IFF_RUNNING) 683 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 684 ng_fec_stop(ifp); 685 } 686 break; 687 688 case SIOCADDMULTI: 689 case SIOCDELMULTI: 690 ng_fec_setport(ifp, command, data); 691 error = 0; 692 break; 693 case SIOCGIFMEDIA: 694 case SIOCSIFMEDIA: 695 error = ifmedia_ioctl(ifp, ifr, &priv->ifmedia, command); 696 break; 697 /* Stuff that's not supported */ 698 case SIOCSIFPHYS: 699 error = EOPNOTSUPP; 700 break; 701 702 default: 703 error = EINVAL; 704 break; 705 } 706 (void) splx(s); 707 return (error); 708 } 709 710 /* 711 * This routine spies on mbufs passing through ether_input(). If 712 * they come from one of the interfaces that are aggregated into 713 * our bundle, we fix up the ifnet pointer and increment our 714 * packet counters so that it looks like the frames are actually 715 * coming from us. 716 */ 717 static void 718 ng_fec_input(struct ifnet *ifp, struct mbuf **m0, 719 struct ether_header *eh) 720 { 721 struct ng_node *node; 722 struct ng_fec_private *priv; 723 struct ng_fec_bundle *b; 724 struct mbuf *m; 725 struct ifnet *bifp; 726 struct ng_fec_portlist *p; 727 728 /* Sanity check */ 729 if (ifp == NULL || m0 == NULL || eh == NULL) 730 return; 731 732 node = IFP2NG(ifp); 733 734 /* Sanity check part II */ 735 if (node == NULL) 736 return; 737 738 priv = node->private; 739 b = &priv->fec_bundle; 740 bifp = &priv->arpcom.ac_if; 741 742 m = *m0; 743 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 744 if (p->fec_if == m->m_pkthdr.rcvif) 745 break; 746 } 747 748 /* Wasn't meant for us; leave this frame alone. */ 749 if (p == NULL) 750 return; 751 752 /* Pretend this is our frame. */ 753 m->m_pkthdr.rcvif = bifp; 754 bifp->if_ipackets++; 755 bifp->if_ibytes += m->m_pkthdr.len + sizeof(struct ether_header); 756 757 /* Check for a BPF tap */ 758 if (bifp->if_bpf != NULL) { 759 struct m_hdr mh; 760 761 /* This kludge is OK; BPF treats the "mbuf" as read-only */ 762 mh.mh_next = m; 763 mh.mh_data = (char *)eh; 764 mh.mh_len = ETHER_HDR_LEN; 765 bpf_mtap(bifp, (struct mbuf *)&mh); 766 } 767 768 return; 769 } 770 771 /* 772 * Take a quick peek at the packet and see if it's ok for us to use 773 * the inet or inet6 hash methods on it, if they're enabled. We do 774 * this by setting flags in the mbuf header. Once we've made up our 775 * mind what to do, we pass the frame to ether_output() for further 776 * processing. 777 */ 778 779 static int 780 ng_fec_output(struct ifnet *ifp, struct mbuf *m, 781 struct sockaddr *dst, struct rtentry *rt0) 782 { 783 const priv_p priv = (priv_p) ifp->if_softc; 784 struct ng_fec_bundle *b; 785 int error; 786 787 /* Check interface flags */ 788 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) { 789 m_freem(m); 790 return (ENETDOWN); 791 } 792 793 b = &priv->fec_bundle; 794 795 switch (b->fec_btype) { 796 case FEC_BTYPE_MAC: 797 m->m_flags |= M_FEC_MAC; 798 break; 799 #ifdef INET 800 case FEC_BTYPE_INET: 801 /* 802 * We can't use the INET address port selection 803 * scheme if this isn't an INET packet. 804 */ 805 if (dst->sa_family == AF_INET) 806 m->m_flags |= M_FEC_INET; 807 #ifdef INET6 808 else if (dst->sa_family == AF_INET6) 809 m->m_flags |= M_FEC_INET6; 810 #endif 811 else { 812 #ifdef DEBUG 813 printf("fec%d: can't do inet aggregation of non " 814 "inet packet\n", ifp->if_unit); 815 #endif 816 m->m_flags |= M_FEC_MAC; 817 } 818 break; 819 #endif 820 default: 821 printf("fec%d: bogus hash type: %d\n", ifp->if_unit, 822 b->fec_btype); 823 m_freem(m); 824 return(EINVAL); 825 break; 826 } 827 828 /* 829 * Pass the frame to ether_output() for all the protocol 830 * handling. This will put the ethernet header on the packet 831 * for us. 832 */ 833 priv->if_error = 0; 834 error = ether_output(ifp, m, dst, rt0); 835 if (priv->if_error && !error) 836 error = priv->if_error; 837 838 return(error); 839 } 840 841 /* 842 * Apply a hash to the source and destination addresses in the packet 843 * in order to select an interface. Also check link status and handle 844 * dead links accordingly. 845 */ 846 847 static int 848 ng_fec_choose_port(struct ng_fec_bundle *b, 849 struct mbuf *m, struct ifnet **ifp) 850 { 851 struct ether_header *eh; 852 struct mbuf *m0; 853 #ifdef INET 854 struct ip *ip; 855 #ifdef INET6 856 struct ip6_hdr *ip6; 857 #endif 858 #endif 859 860 struct ng_fec_portlist *p; 861 int port = 0, mask; 862 863 /* 864 * If there are only two ports, mask off all but the 865 * last bit for XORing. If there are 4, mask off all 866 * but the last 2 bits. 867 */ 868 mask = b->fec_ifcnt == 2 ? 0x1 : 0x3; 869 eh = mtod(m, struct ether_header *); 870 #ifdef INET 871 ip = (struct ip *)(mtod(m, char *) + 872 sizeof(struct ether_header)); 873 #ifdef INET6 874 ip6 = (struct ip6_hdr *)(mtod(m, char *) + 875 sizeof(struct ether_header)); 876 #endif 877 #endif 878 879 /* 880 * The fg_fec_output() routine is supposed to leave a 881 * flag for us in the mbuf that tells us what hash to 882 * use, but sometimes a new mbuf is prepended to the 883 * chain, so we have to search every mbuf in the chain 884 * to find the flags. 885 */ 886 m0 = m; 887 while (m0) { 888 if (m0->m_flags & (M_FEC_MAC|M_FEC_INET|M_FEC_INET6)) 889 break; 890 m0 = m0->m_next; 891 } 892 if (m0 == NULL) 893 return(EINVAL); 894 895 switch (m0->m_flags & (M_FEC_MAC|M_FEC_INET|M_FEC_INET6)) { 896 case M_FEC_MAC: 897 port = (eh->ether_dhost[5] ^ 898 eh->ether_shost[5]) & mask; 899 break; 900 #ifdef INET 901 case M_FEC_INET: 902 port = (ntohl(ip->ip_dst.s_addr) ^ 903 ntohl(ip->ip_src.s_addr)) & mask; 904 break; 905 #ifdef INET6 906 case M_FEC_INET6: 907 port = (ip6->ip6_dst.s6_addr[15] ^ 908 ip6->ip6_dst.s6_addr[15]) & mask; 909 break; 910 #endif 911 #endif 912 default: 913 return(EINVAL); 914 break; 915 } 916 917 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 918 if (port == p->fec_idx) 919 break; 920 } 921 922 /* 923 * Now that we've chosen a port, make sure it's 924 * alive. If it's not alive, cycle through the bundle 925 * looking for a port that is alive. If we don't find 926 * any, return an error. 927 */ 928 if (p->fec_ifstat != 1) { 929 struct ng_fec_portlist *n = NULL; 930 931 n = TAILQ_NEXT(p, fec_list); 932 if (n == NULL) 933 n = TAILQ_FIRST(&b->ng_fec_ports); 934 while (n != p) { 935 if (n->fec_ifstat == 1) 936 break; 937 n = TAILQ_NEXT(n, fec_list); 938 if (n == NULL) 939 n = TAILQ_FIRST(&b->ng_fec_ports); 940 } 941 if (n == p) 942 return(EAGAIN); 943 p = n; 944 } 945 946 *ifp = p->fec_if; 947 948 return(0); 949 } 950 951 /* 952 * Now that the packet has been run through ether_output(), yank it 953 * off our own send queue and stick it on the queue for the appropriate 954 * underlying physical interface. Note that if the interface's send 955 * queue is full, we save an error status in our private netgraph 956 * space which will eventually be handed up to ng_fec_output(), which 957 * will return it to the rest of the IP stack. We need to do this 958 * in order to duplicate the effect of ether_output() returning ENOBUFS 959 * when it detects that an interface's send queue is full. There's no 960 * other way to signal the error status from here since the if_start() 961 * routine is spec'ed to return void. 962 * 963 * Once the frame is queued, we call ether_output_frame() to initiate 964 * transmission. 965 */ 966 static void 967 ng_fec_start(struct ifnet *ifp) 968 { 969 struct ng_fec_private *priv; 970 struct ng_fec_bundle *b; 971 struct ifnet *oifp = NULL; 972 struct mbuf *m0; 973 int error; 974 975 priv = ifp->if_softc; 976 b = &priv->fec_bundle; 977 978 IF_DEQUEUE(&ifp->if_snd, m0); 979 if (m0 == NULL) 980 return; 981 982 if (ifp->if_bpf) 983 bpf_mtap(ifp, m0); 984 985 /* Queue up packet on the proper port. */ 986 error = ng_fec_choose_port(b, m0, &oifp); 987 if (error) { 988 ifp->if_ierrors++; 989 m_freem(m0); 990 priv->if_error = ENOBUFS; 991 return; 992 } 993 ifp->if_opackets++; 994 995 priv->if_error = ether_output_frame(oifp, m0); 996 return; 997 } 998 999 #ifdef DEBUG 1000 /* 1001 * Display an ioctl to the virtual interface 1002 */ 1003 1004 static void 1005 ng_fec_print_ioctl(struct ifnet *ifp, int command, caddr_t data) 1006 { 1007 char *str; 1008 1009 switch (command & IOC_DIRMASK) { 1010 case IOC_VOID: 1011 str = "IO"; 1012 break; 1013 case IOC_OUT: 1014 str = "IOR"; 1015 break; 1016 case IOC_IN: 1017 str = "IOW"; 1018 break; 1019 case IOC_INOUT: 1020 str = "IORW"; 1021 break; 1022 default: 1023 str = "IO??"; 1024 } 1025 log(LOG_DEBUG, "%s%d: %s('%c', %d, char[%d])\n", 1026 ifp->if_name, ifp->if_unit, 1027 str, 1028 IOCGROUP(command), 1029 command & 0xff, 1030 IOCPARM_LEN(command)); 1031 } 1032 #endif /* DEBUG */ 1033 1034 /************************************************************************ 1035 NETGRAPH NODE STUFF 1036 ************************************************************************/ 1037 1038 /* 1039 * Constructor for a node 1040 */ 1041 static int 1042 ng_fec_constructor(node_p *nodep) 1043 { 1044 char ifname[NG_FEC_FEC_NAME_MAX + 1]; 1045 struct ifnet *ifp; 1046 node_p node; 1047 priv_p priv; 1048 struct ng_fec_bundle *b; 1049 int error = 0; 1050 1051 /* Allocate node and interface private structures */ 1052 MALLOC(priv, priv_p, sizeof(*priv), M_NETGRAPH, M_NOWAIT); 1053 if (priv == NULL) 1054 return (ENOMEM); 1055 bzero(priv, sizeof(*priv)); 1056 1057 ifp = &priv->arpcom.ac_if; 1058 b = &priv->fec_bundle; 1059 1060 /* Link them together */ 1061 ifp->if_softc = priv; 1062 1063 /* Get an interface unit number */ 1064 if ((error = ng_fec_get_unit(&priv->unit)) != 0) { 1065 FREE(ifp, M_NETGRAPH); 1066 FREE(priv, M_NETGRAPH); 1067 return (error); 1068 } 1069 1070 /* Call generic node constructor */ 1071 if ((error = ng_make_node_common(&typestruct, nodep)) != 0) { 1072 ng_fec_free_unit(priv->unit); 1073 FREE(ifp, M_NETGRAPH); 1074 FREE(priv, M_NETGRAPH); 1075 return (error); 1076 } 1077 node = *nodep; 1078 1079 /* Link together node and private info */ 1080 node->private = priv; 1081 priv->node = node; 1082 priv->arpcom.ac_netgraph = node; 1083 1084 /* Initialize interface structure */ 1085 ifp->if_name = NG_FEC_FEC_NAME; 1086 ifp->if_unit = priv->unit; 1087 ifp->if_output = ng_fec_output; 1088 ifp->if_start = ng_fec_start; 1089 ifp->if_ioctl = ng_fec_ioctl; 1090 ifp->if_init = ng_fec_init; 1091 ifp->if_watchdog = NULL; 1092 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; 1093 ifp->if_mtu = NG_FEC_MTU_DEFAULT; 1094 ifp->if_flags = (IFF_SIMPLEX|IFF_BROADCAST|IFF_MULTICAST); 1095 ifp->if_type = IFT_PROPVIRTUAL; /* XXX */ 1096 ifp->if_addrlen = 0; /* XXX */ 1097 ifp->if_hdrlen = 0; /* XXX */ 1098 ifp->if_baudrate = 100000000; /* XXX */ 1099 TAILQ_INIT(&ifp->if_addrhead); 1100 1101 /* Give this node the same name as the interface (if possible) */ 1102 bzero(ifname, sizeof(ifname)); 1103 snprintf(ifname, sizeof(ifname), "%s%d", ifp->if_name, ifp->if_unit); 1104 if (ng_name_node(node, ifname) != 0) 1105 log(LOG_WARNING, "%s: can't acquire netgraph name\n", ifname); 1106 1107 /* Grab hold of the ether_input pipe. */ 1108 if (ng_ether_input_p == NULL) 1109 ng_ether_input_p = ng_fec_input; 1110 1111 /* Attach the interface */ 1112 ether_ifattach(ifp, ETHER_BPF_SUPPORTED); 1113 callout_handle_init(&priv->fec_ch); 1114 1115 TAILQ_INIT(&b->ng_fec_ports); 1116 b->fec_ifcnt = 0; 1117 1118 ifmedia_init(&priv->ifmedia, 0, 1119 ng_fec_ifmedia_upd, ng_fec_ifmedia_sts); 1120 ifmedia_add(&priv->ifmedia, IFM_ETHER|IFM_NONE, 0, NULL); 1121 ifmedia_set(&priv->ifmedia, IFM_ETHER|IFM_NONE); 1122 1123 /* Done */ 1124 return (0); 1125 } 1126 1127 /* 1128 * Receive a control message 1129 */ 1130 static int 1131 ng_fec_rcvmsg(node_p node, struct ng_mesg *msg, 1132 const char *retaddr, struct ng_mesg **rptr) 1133 { 1134 const priv_p priv = node->private; 1135 struct ng_fec_bundle *b; 1136 struct ng_mesg *resp = NULL; 1137 char *ifname; 1138 int error = 0; 1139 1140 b = &priv->fec_bundle; 1141 1142 switch (msg->header.typecookie) { 1143 case NGM_FEC_COOKIE: 1144 switch (msg->header.cmd) { 1145 case NGM_FEC_ADD_IFACE: 1146 ifname = msg->data; 1147 error = ng_fec_addport(priv, ifname); 1148 break; 1149 case NGM_FEC_DEL_IFACE: 1150 ifname = msg->data; 1151 error = ng_fec_delport(priv, ifname); 1152 break; 1153 case NGM_FEC_SET_MODE_MAC: 1154 b->fec_btype = FEC_BTYPE_MAC; 1155 break; 1156 #ifdef INET 1157 case NGM_FEC_SET_MODE_INET: 1158 b->fec_btype = FEC_BTYPE_INET; 1159 break; 1160 #ifdef INET6 1161 case NGM_FEC_SET_MODE_INET6: 1162 b->fec_btype = FEC_BTYPE_INET6; 1163 break; 1164 #endif 1165 #endif 1166 default: 1167 error = EINVAL; 1168 break; 1169 } 1170 break; 1171 default: 1172 error = EINVAL; 1173 break; 1174 } 1175 if (rptr) 1176 *rptr = resp; 1177 else if (resp) 1178 FREE(resp, M_NETGRAPH); 1179 FREE(msg, M_NETGRAPH); 1180 return (error); 1181 } 1182 1183 /* 1184 * Shutdown and remove the node and its associated interface. 1185 */ 1186 static int 1187 ng_fec_rmnode(node_p node) 1188 { 1189 const priv_p priv = node->private; 1190 struct ng_fec_bundle *b; 1191 struct ng_fec_portlist *p; 1192 char ifname[IFNAMSIZ]; 1193 1194 b = &priv->fec_bundle; 1195 ng_fec_stop(&priv->arpcom.ac_if); 1196 1197 while (!TAILQ_EMPTY(&b->ng_fec_ports)) { 1198 p = TAILQ_FIRST(&b->ng_fec_ports); 1199 sprintf(ifname, "%s%d", 1200 p->fec_if->if_name, 1201 p->fec_if->if_unit); 1202 ng_fec_delport(priv, ifname); 1203 } 1204 1205 ng_cutlinks(node); 1206 ng_unname(node); 1207 if (ng_ether_input_p != NULL) 1208 ng_ether_input_p = NULL; 1209 ether_ifdetach(&priv->arpcom.ac_if, ETHER_BPF_SUPPORTED); 1210 ifmedia_removeall(&priv->ifmedia); 1211 ng_fec_free_unit(priv->unit); 1212 FREE(priv, M_NETGRAPH); 1213 node->private = NULL; 1214 ng_unref(node); 1215 return (0); 1216 } 1217