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 1.4 2004/01/06 03:17:27 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\n", priv->unit, ifp->if_xname); 565 continue; 566 } 567 568 if (ifmr.ifm_status & IFM_AVALID && 569 IFM_TYPE(ifmr.ifm_active) == IFM_ETHER) { 570 if (ifmr.ifm_status & IFM_ACTIVE) { 571 if (p->fec_ifstat == -1 || 572 p->fec_ifstat == 0) { 573 p->fec_ifstat = 1; 574 printf("fec%d: port %s in bundle " 575 "is up\n", priv->unit, 576 ifp->if_xname); 577 } 578 } else { 579 if (p->fec_ifstat == -1 || 580 p->fec_ifstat == 1) { 581 p->fec_ifstat = 0; 582 printf("fec%d: port %s in bundle " 583 "is down\n", priv->unit, 584 ifp->if_xname); 585 } 586 } 587 } 588 } 589 590 ifp = &priv->arpcom.ac_if; 591 if (ifp->if_flags & IFF_RUNNING) 592 priv->fec_ch = timeout(ng_fec_tick, priv, hz); 593 594 return; 595 } 596 597 static int 598 ng_fec_ifmedia_upd(struct ifnet *ifp) 599 { 600 return(0); 601 } 602 603 static void ng_fec_ifmedia_sts(struct ifnet *ifp, 604 struct ifmediareq *ifmr) 605 { 606 struct ng_fec_private *priv; 607 struct ng_fec_bundle *b; 608 struct ng_fec_portlist *p; 609 610 priv = ifp->if_softc; 611 b = &priv->fec_bundle; 612 613 ifmr->ifm_status = IFM_AVALID; 614 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 615 if (p->fec_ifstat) { 616 ifmr->ifm_status |= IFM_ACTIVE; 617 break; 618 } 619 } 620 621 return; 622 } 623 624 /* 625 * Process an ioctl for the virtual interface 626 */ 627 static int 628 ng_fec_ioctl(struct ifnet *ifp, u_long command, caddr_t data) 629 { 630 struct ifreq *const ifr = (struct ifreq *) data; 631 int s, error = 0; 632 struct ng_fec_private *priv; 633 struct ng_fec_bundle *b; 634 635 priv = ifp->if_softc; 636 b = &priv->fec_bundle; 637 638 #ifdef DEBUG 639 ng_fec_print_ioctl(ifp, command, data); 640 #endif 641 s = splimp(); 642 switch (command) { 643 644 /* These two are mostly handled at a higher layer */ 645 case SIOCSIFADDR: 646 case SIOCGIFADDR: 647 case SIOCSIFMTU: 648 error = ether_ioctl(ifp, command, data); 649 break; 650 651 /* Set flags */ 652 case SIOCSIFFLAGS: 653 /* 654 * If the interface is marked up and stopped, then start it. 655 * If it is marked down and running, then stop it. 656 */ 657 if (ifr->ifr_flags & IFF_UP) { 658 if (!(ifp->if_flags & IFF_RUNNING)) { 659 /* Sanity. */ 660 if (b->fec_ifcnt == 1 || b->fec_ifcnt == 3) { 661 printf("fec%d: invalid bundle " 662 "size: %d\n", priv->unit, 663 b->fec_ifcnt); 664 error = EINVAL; 665 break; 666 } 667 ifp->if_flags &= ~(IFF_OACTIVE); 668 ifp->if_flags |= IFF_RUNNING; 669 ng_fec_init(ifp); 670 } 671 /* 672 * Bubble down changes in promisc mode to 673 * underlying interfaces. 674 */ 675 if ((ifp->if_flags & IFF_PROMISC) != 676 (priv->if_flags & IFF_PROMISC)) { 677 ng_fec_setport(ifp, command, data); 678 priv->if_flags = ifp->if_flags; 679 } 680 } else { 681 if (ifp->if_flags & IFF_RUNNING) 682 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 683 ng_fec_stop(ifp); 684 } 685 break; 686 687 case SIOCADDMULTI: 688 case SIOCDELMULTI: 689 ng_fec_setport(ifp, command, data); 690 error = 0; 691 break; 692 case SIOCGIFMEDIA: 693 case SIOCSIFMEDIA: 694 error = ifmedia_ioctl(ifp, ifr, &priv->ifmedia, command); 695 break; 696 /* Stuff that's not supported */ 697 case SIOCSIFPHYS: 698 error = EOPNOTSUPP; 699 break; 700 701 default: 702 error = EINVAL; 703 break; 704 } 705 (void) splx(s); 706 return (error); 707 } 708 709 /* 710 * This routine spies on mbufs passing through ether_input(). If 711 * they come from one of the interfaces that are aggregated into 712 * our bundle, we fix up the ifnet pointer and increment our 713 * packet counters so that it looks like the frames are actually 714 * coming from us. 715 */ 716 static void 717 ng_fec_input(struct ifnet *ifp, struct mbuf **m0, 718 struct ether_header *eh) 719 { 720 struct ng_node *node; 721 struct ng_fec_private *priv; 722 struct ng_fec_bundle *b; 723 struct mbuf *m; 724 struct ifnet *bifp; 725 struct ng_fec_portlist *p; 726 727 /* Sanity check */ 728 if (ifp == NULL || m0 == NULL || eh == NULL) 729 return; 730 731 node = IFP2NG(ifp); 732 733 /* Sanity check part II */ 734 if (node == NULL) 735 return; 736 737 priv = node->private; 738 b = &priv->fec_bundle; 739 bifp = &priv->arpcom.ac_if; 740 741 m = *m0; 742 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 743 if (p->fec_if == m->m_pkthdr.rcvif) 744 break; 745 } 746 747 /* Wasn't meant for us; leave this frame alone. */ 748 if (p == NULL) 749 return; 750 751 /* Pretend this is our frame. */ 752 m->m_pkthdr.rcvif = bifp; 753 bifp->if_ipackets++; 754 bifp->if_ibytes += m->m_pkthdr.len + sizeof(struct ether_header); 755 756 /* Check for a BPF tap */ 757 if (bifp->if_bpf != NULL) { 758 struct m_hdr mh; 759 760 /* This kludge is OK; BPF treats the "mbuf" as read-only */ 761 mh.mh_next = m; 762 mh.mh_data = (char *)eh; 763 mh.mh_len = ETHER_HDR_LEN; 764 bpf_mtap(bifp, (struct mbuf *)&mh); 765 } 766 767 return; 768 } 769 770 /* 771 * Take a quick peek at the packet and see if it's ok for us to use 772 * the inet or inet6 hash methods on it, if they're enabled. We do 773 * this by setting flags in the mbuf header. Once we've made up our 774 * mind what to do, we pass the frame to ether_output() for further 775 * processing. 776 */ 777 778 static int 779 ng_fec_output(struct ifnet *ifp, struct mbuf *m, 780 struct sockaddr *dst, struct rtentry *rt0) 781 { 782 const priv_p priv = (priv_p) ifp->if_softc; 783 struct ng_fec_bundle *b; 784 int error; 785 786 /* Check interface flags */ 787 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) { 788 m_freem(m); 789 return (ENETDOWN); 790 } 791 792 b = &priv->fec_bundle; 793 794 switch (b->fec_btype) { 795 case FEC_BTYPE_MAC: 796 m->m_flags |= M_FEC_MAC; 797 break; 798 #ifdef INET 799 case FEC_BTYPE_INET: 800 /* 801 * We can't use the INET address port selection 802 * scheme if this isn't an INET packet. 803 */ 804 if (dst->sa_family == AF_INET) 805 m->m_flags |= M_FEC_INET; 806 #ifdef INET6 807 else if (dst->sa_family == AF_INET6) 808 m->m_flags |= M_FEC_INET6; 809 #endif 810 else { 811 #ifdef DEBUG 812 printf("%s: can't do inet aggregation of non " 813 "inet packet\n", ifp->if_xname); 814 #endif 815 m->m_flags |= M_FEC_MAC; 816 } 817 break; 818 #endif 819 default: 820 printf("%s: bogus hash type: %d\n", ifp->if_xname, 821 b->fec_btype); 822 m_freem(m); 823 return(EINVAL); 824 break; 825 } 826 827 /* 828 * Pass the frame to ether_output() for all the protocol 829 * handling. This will put the ethernet header on the packet 830 * for us. 831 */ 832 priv->if_error = 0; 833 error = ether_output(ifp, m, dst, rt0); 834 if (priv->if_error && !error) 835 error = priv->if_error; 836 837 return(error); 838 } 839 840 /* 841 * Apply a hash to the source and destination addresses in the packet 842 * in order to select an interface. Also check link status and handle 843 * dead links accordingly. 844 */ 845 846 static int 847 ng_fec_choose_port(struct ng_fec_bundle *b, 848 struct mbuf *m, struct ifnet **ifp) 849 { 850 struct ether_header *eh; 851 struct mbuf *m0; 852 #ifdef INET 853 struct ip *ip; 854 #ifdef INET6 855 struct ip6_hdr *ip6; 856 #endif 857 #endif 858 859 struct ng_fec_portlist *p; 860 int port = 0, mask; 861 862 /* 863 * If there are only two ports, mask off all but the 864 * last bit for XORing. If there are 4, mask off all 865 * but the last 2 bits. 866 */ 867 mask = b->fec_ifcnt == 2 ? 0x1 : 0x3; 868 eh = mtod(m, struct ether_header *); 869 #ifdef INET 870 ip = (struct ip *)(mtod(m, char *) + 871 sizeof(struct ether_header)); 872 #ifdef INET6 873 ip6 = (struct ip6_hdr *)(mtod(m, char *) + 874 sizeof(struct ether_header)); 875 #endif 876 #endif 877 878 /* 879 * The fg_fec_output() routine is supposed to leave a 880 * flag for us in the mbuf that tells us what hash to 881 * use, but sometimes a new mbuf is prepended to the 882 * chain, so we have to search every mbuf in the chain 883 * to find the flags. 884 */ 885 m0 = m; 886 while (m0) { 887 if (m0->m_flags & (M_FEC_MAC|M_FEC_INET|M_FEC_INET6)) 888 break; 889 m0 = m0->m_next; 890 } 891 if (m0 == NULL) 892 return(EINVAL); 893 894 switch (m0->m_flags & (M_FEC_MAC|M_FEC_INET|M_FEC_INET6)) { 895 case M_FEC_MAC: 896 port = (eh->ether_dhost[5] ^ 897 eh->ether_shost[5]) & mask; 898 break; 899 #ifdef INET 900 case M_FEC_INET: 901 port = (ntohl(ip->ip_dst.s_addr) ^ 902 ntohl(ip->ip_src.s_addr)) & mask; 903 break; 904 #ifdef INET6 905 case M_FEC_INET6: 906 port = (ip6->ip6_dst.s6_addr[15] ^ 907 ip6->ip6_dst.s6_addr[15]) & mask; 908 break; 909 #endif 910 #endif 911 default: 912 return(EINVAL); 913 break; 914 } 915 916 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 917 if (port == p->fec_idx) 918 break; 919 } 920 921 /* 922 * Now that we've chosen a port, make sure it's 923 * alive. If it's not alive, cycle through the bundle 924 * looking for a port that is alive. If we don't find 925 * any, return an error. 926 */ 927 if (p->fec_ifstat != 1) { 928 struct ng_fec_portlist *n = NULL; 929 930 n = TAILQ_NEXT(p, fec_list); 931 if (n == NULL) 932 n = TAILQ_FIRST(&b->ng_fec_ports); 933 while (n != p) { 934 if (n->fec_ifstat == 1) 935 break; 936 n = TAILQ_NEXT(n, fec_list); 937 if (n == NULL) 938 n = TAILQ_FIRST(&b->ng_fec_ports); 939 } 940 if (n == p) 941 return(EAGAIN); 942 p = n; 943 } 944 945 *ifp = p->fec_if; 946 947 return(0); 948 } 949 950 /* 951 * Now that the packet has been run through ether_output(), yank it 952 * off our own send queue and stick it on the queue for the appropriate 953 * underlying physical interface. Note that if the interface's send 954 * queue is full, we save an error status in our private netgraph 955 * space which will eventually be handed up to ng_fec_output(), which 956 * will return it to the rest of the IP stack. We need to do this 957 * in order to duplicate the effect of ether_output() returning ENOBUFS 958 * when it detects that an interface's send queue is full. There's no 959 * other way to signal the error status from here since the if_start() 960 * routine is spec'ed to return void. 961 * 962 * Once the frame is queued, we call ether_output_frame() to initiate 963 * transmission. 964 */ 965 static void 966 ng_fec_start(struct ifnet *ifp) 967 { 968 struct ng_fec_private *priv; 969 struct ng_fec_bundle *b; 970 struct ifnet *oifp = NULL; 971 struct mbuf *m0; 972 int error; 973 974 priv = ifp->if_softc; 975 b = &priv->fec_bundle; 976 977 IF_DEQUEUE(&ifp->if_snd, m0); 978 if (m0 == NULL) 979 return; 980 981 if (ifp->if_bpf) 982 bpf_mtap(ifp, m0); 983 984 /* Queue up packet on the proper port. */ 985 error = ng_fec_choose_port(b, m0, &oifp); 986 if (error) { 987 ifp->if_ierrors++; 988 m_freem(m0); 989 priv->if_error = ENOBUFS; 990 return; 991 } 992 ifp->if_opackets++; 993 994 priv->if_error = ether_output_frame(oifp, m0); 995 return; 996 } 997 998 #ifdef DEBUG 999 /* 1000 * Display an ioctl to the virtual interface 1001 */ 1002 1003 static void 1004 ng_fec_print_ioctl(struct ifnet *ifp, int command, caddr_t data) 1005 { 1006 char *str; 1007 1008 switch (command & IOC_DIRMASK) { 1009 case IOC_VOID: 1010 str = "IO"; 1011 break; 1012 case IOC_OUT: 1013 str = "IOR"; 1014 break; 1015 case IOC_IN: 1016 str = "IOW"; 1017 break; 1018 case IOC_INOUT: 1019 str = "IORW"; 1020 break; 1021 default: 1022 str = "IO??"; 1023 } 1024 log(LOG_DEBUG, "%s: %s('%c', %d, char[%d])\n", 1025 ifp->if_xname, 1026 str, 1027 IOCGROUP(command), 1028 command & 0xff, 1029 IOCPARM_LEN(command)); 1030 } 1031 #endif /* DEBUG */ 1032 1033 /************************************************************************ 1034 NETGRAPH NODE STUFF 1035 ************************************************************************/ 1036 1037 /* 1038 * Constructor for a node 1039 */ 1040 static int 1041 ng_fec_constructor(node_p *nodep) 1042 { 1043 char ifname[NG_FEC_FEC_NAME_MAX + 1]; 1044 struct ifnet *ifp; 1045 node_p node; 1046 priv_p priv; 1047 struct ng_fec_bundle *b; 1048 int error = 0; 1049 1050 /* Allocate node and interface private structures */ 1051 MALLOC(priv, priv_p, sizeof(*priv), M_NETGRAPH, M_NOWAIT); 1052 if (priv == NULL) 1053 return (ENOMEM); 1054 bzero(priv, sizeof(*priv)); 1055 1056 ifp = &priv->arpcom.ac_if; 1057 b = &priv->fec_bundle; 1058 1059 /* Link them together */ 1060 ifp->if_softc = priv; 1061 1062 /* Get an interface unit number */ 1063 if ((error = ng_fec_get_unit(&priv->unit)) != 0) { 1064 FREE(ifp, M_NETGRAPH); 1065 FREE(priv, M_NETGRAPH); 1066 return (error); 1067 } 1068 1069 /* Call generic node constructor */ 1070 if ((error = ng_make_node_common(&typestruct, nodep)) != 0) { 1071 ng_fec_free_unit(priv->unit); 1072 FREE(ifp, M_NETGRAPH); 1073 FREE(priv, M_NETGRAPH); 1074 return (error); 1075 } 1076 node = *nodep; 1077 1078 /* Link together node and private info */ 1079 node->private = priv; 1080 priv->node = node; 1081 priv->arpcom.ac_netgraph = node; 1082 1083 /* Initialize interface structure */ 1084 if_initname(ifp, NG_FEC_FEC_NAME, priv->unit); 1085 ifp->if_output = ng_fec_output; 1086 ifp->if_start = ng_fec_start; 1087 ifp->if_ioctl = ng_fec_ioctl; 1088 ifp->if_init = ng_fec_init; 1089 ifp->if_watchdog = NULL; 1090 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; 1091 ifp->if_mtu = NG_FEC_MTU_DEFAULT; 1092 ifp->if_flags = (IFF_SIMPLEX|IFF_BROADCAST|IFF_MULTICAST); 1093 ifp->if_type = IFT_PROPVIRTUAL; /* XXX */ 1094 ifp->if_addrlen = 0; /* XXX */ 1095 ifp->if_hdrlen = 0; /* XXX */ 1096 ifp->if_baudrate = 100000000; /* XXX */ 1097 TAILQ_INIT(&ifp->if_addrhead); 1098 1099 /* Give this node the same name as the interface (if possible) */ 1100 bzero(ifname, sizeof(ifname)); 1101 strlcpy(ifname, ifp->if_xname, sizeof(ifname)); 1102 if (ng_name_node(node, ifname) != 0) 1103 log(LOG_WARNING, "%s: can't acquire netgraph name\n", ifname); 1104 1105 /* Grab hold of the ether_input pipe. */ 1106 if (ng_ether_input_p == NULL) 1107 ng_ether_input_p = ng_fec_input; 1108 1109 /* Attach the interface */ 1110 ether_ifattach(ifp, ETHER_BPF_SUPPORTED); 1111 callout_handle_init(&priv->fec_ch); 1112 1113 TAILQ_INIT(&b->ng_fec_ports); 1114 b->fec_ifcnt = 0; 1115 1116 ifmedia_init(&priv->ifmedia, 0, 1117 ng_fec_ifmedia_upd, ng_fec_ifmedia_sts); 1118 ifmedia_add(&priv->ifmedia, IFM_ETHER|IFM_NONE, 0, NULL); 1119 ifmedia_set(&priv->ifmedia, IFM_ETHER|IFM_NONE); 1120 1121 /* Done */ 1122 return (0); 1123 } 1124 1125 /* 1126 * Receive a control message 1127 */ 1128 static int 1129 ng_fec_rcvmsg(node_p node, struct ng_mesg *msg, 1130 const char *retaddr, struct ng_mesg **rptr) 1131 { 1132 const priv_p priv = node->private; 1133 struct ng_fec_bundle *b; 1134 struct ng_mesg *resp = NULL; 1135 char *ifname; 1136 int error = 0; 1137 1138 b = &priv->fec_bundle; 1139 1140 switch (msg->header.typecookie) { 1141 case NGM_FEC_COOKIE: 1142 switch (msg->header.cmd) { 1143 case NGM_FEC_ADD_IFACE: 1144 ifname = msg->data; 1145 error = ng_fec_addport(priv, ifname); 1146 break; 1147 case NGM_FEC_DEL_IFACE: 1148 ifname = msg->data; 1149 error = ng_fec_delport(priv, ifname); 1150 break; 1151 case NGM_FEC_SET_MODE_MAC: 1152 b->fec_btype = FEC_BTYPE_MAC; 1153 break; 1154 #ifdef INET 1155 case NGM_FEC_SET_MODE_INET: 1156 b->fec_btype = FEC_BTYPE_INET; 1157 break; 1158 #ifdef INET6 1159 case NGM_FEC_SET_MODE_INET6: 1160 b->fec_btype = FEC_BTYPE_INET6; 1161 break; 1162 #endif 1163 #endif 1164 default: 1165 error = EINVAL; 1166 break; 1167 } 1168 break; 1169 default: 1170 error = EINVAL; 1171 break; 1172 } 1173 if (rptr) 1174 *rptr = resp; 1175 else if (resp) 1176 FREE(resp, M_NETGRAPH); 1177 FREE(msg, M_NETGRAPH); 1178 return (error); 1179 } 1180 1181 /* 1182 * Shutdown and remove the node and its associated interface. 1183 */ 1184 static int 1185 ng_fec_rmnode(node_p node) 1186 { 1187 const priv_p priv = node->private; 1188 struct ng_fec_bundle *b; 1189 struct ng_fec_portlist *p; 1190 char ifname[IFNAMSIZ]; 1191 1192 b = &priv->fec_bundle; 1193 ng_fec_stop(&priv->arpcom.ac_if); 1194 1195 while (!TAILQ_EMPTY(&b->ng_fec_ports)) { 1196 p = TAILQ_FIRST(&b->ng_fec_ports); 1197 sprintf(ifname, "%s", 1198 p->fec_if->if_xname); /* XXX: strings */ 1199 ng_fec_delport(priv, ifname); 1200 } 1201 1202 ng_cutlinks(node); 1203 ng_unname(node); 1204 if (ng_ether_input_p != NULL) 1205 ng_ether_input_p = NULL; 1206 ether_ifdetach(&priv->arpcom.ac_if, ETHER_BPF_SUPPORTED); 1207 ifmedia_removeall(&priv->ifmedia); 1208 ng_fec_free_unit(priv->unit); 1209 FREE(priv, M_NETGRAPH); 1210 node->private = NULL; 1211 ng_unref(node); 1212 return (0); 1213 } 1214