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 1.9 2004/09/16 03:43:09 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 fec_timeout; /* callout for ticker */ 167 int (*real_if_output)(struct ifnet *, struct mbuf *, 168 struct sockaddr *, struct rtentry *); 169 }; 170 typedef struct ng_fec_private *priv_p; 171 172 /* Interface methods */ 173 static void ng_fec_input(struct ifnet *, struct mbuf **, 174 struct ether_header *); 175 static void ng_fec_start(struct ifnet *ifp); 176 static int ng_fec_choose_port(struct ng_fec_bundle *b, 177 struct mbuf *m, struct ifnet **ifp); 178 static int ng_fec_setport(struct ifnet *ifp, u_long cmd, caddr_t data); 179 static void ng_fec_init(void *arg); 180 static void ng_fec_stop(struct ifnet *ifp); 181 static int ng_fec_ifmedia_upd(struct ifnet *ifp); 182 static void ng_fec_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr); 183 static int ng_fec_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, 184 struct ucred *); 185 static int ng_fec_output(struct ifnet *ifp, struct mbuf *m0, 186 struct sockaddr *dst, struct rtentry *rt0); 187 static void ng_fec_tick(void *arg); 188 static int ng_fec_addport(struct ng_fec_private *priv, char *iface); 189 static int ng_fec_delport(struct ng_fec_private *priv, char *iface); 190 191 #ifdef DEBUG 192 static void ng_fec_print_ioctl(struct ifnet *ifp, int cmd, caddr_t data); 193 #endif 194 195 /* Netgraph methods */ 196 static ng_constructor_t ng_fec_constructor; 197 static ng_rcvmsg_t ng_fec_rcvmsg; 198 static ng_shutdown_t ng_fec_rmnode; 199 200 /* List of commands and how to convert arguments to/from ASCII */ 201 static const struct ng_cmdlist ng_fec_cmds[] = { 202 { 203 NGM_FEC_COOKIE, 204 NGM_FEC_ADD_IFACE, 205 "add_iface", 206 &ng_parse_string_type, 207 NULL, 208 }, 209 { 210 NGM_FEC_COOKIE, 211 NGM_FEC_DEL_IFACE, 212 "del_iface", 213 &ng_parse_string_type, 214 NULL, 215 }, 216 { 217 NGM_FEC_COOKIE, 218 NGM_FEC_SET_MODE_MAC, 219 "set_mode_mac", 220 NULL, 221 NULL, 222 }, 223 { 224 NGM_FEC_COOKIE, 225 NGM_FEC_SET_MODE_INET, 226 "set_mode_inet", 227 NULL, 228 NULL, 229 }, 230 { 0 } 231 }; 232 233 /* Node type descriptor */ 234 static struct ng_type typestruct = { 235 NG_VERSION, 236 NG_FEC_NODE_TYPE, 237 NULL, 238 ng_fec_constructor, 239 ng_fec_rcvmsg, 240 ng_fec_rmnode, 241 NULL, 242 NULL, 243 NULL, 244 NULL, 245 NULL, 246 NULL, 247 ng_fec_cmds 248 }; 249 NETGRAPH_INIT(fec, &typestruct); 250 251 /* We keep a bitmap indicating which unit numbers are free. 252 One means the unit number is free, zero means it's taken. */ 253 static int *ng_fec_units = NULL; 254 static int ng_fec_units_len = 0; 255 static int ng_units_in_use = 0; 256 257 #define UNITS_BITSPERWORD (sizeof(*ng_fec_units) * NBBY) 258 259 /* 260 * Find the first free unit number for a new interface. 261 * Increase the size of the unit bitmap as necessary. 262 */ 263 static __inline__ int 264 ng_fec_get_unit(int *unit) 265 { 266 int index, bit; 267 268 for (index = 0; index < ng_fec_units_len 269 && ng_fec_units[index] == 0; index++); 270 if (index == ng_fec_units_len) { /* extend array */ 271 int i, *newarray, newlen; 272 273 newlen = (2 * ng_fec_units_len) + 4; 274 MALLOC(newarray, int *, newlen * sizeof(*ng_fec_units), 275 M_NETGRAPH, M_NOWAIT); 276 if (newarray == NULL) 277 return (ENOMEM); 278 bcopy(ng_fec_units, newarray, 279 ng_fec_units_len * sizeof(*ng_fec_units)); 280 for (i = ng_fec_units_len; i < newlen; i++) 281 newarray[i] = ~0; 282 if (ng_fec_units != NULL) 283 FREE(ng_fec_units, M_NETGRAPH); 284 ng_fec_units = newarray; 285 ng_fec_units_len = newlen; 286 } 287 bit = ffs(ng_fec_units[index]) - 1; 288 KASSERT(bit >= 0 && bit <= UNITS_BITSPERWORD - 1, 289 ("%s: word=%d bit=%d", __FUNCTION__, ng_fec_units[index], bit)); 290 ng_fec_units[index] &= ~(1 << bit); 291 *unit = (index * UNITS_BITSPERWORD) + bit; 292 ng_units_in_use++; 293 return (0); 294 } 295 296 /* 297 * Free a no longer needed unit number. 298 */ 299 static __inline__ void 300 ng_fec_free_unit(int unit) 301 { 302 int index, bit; 303 304 index = unit / UNITS_BITSPERWORD; 305 bit = unit % UNITS_BITSPERWORD; 306 KASSERT(index < ng_fec_units_len, 307 ("%s: unit=%d len=%d", __FUNCTION__, unit, ng_fec_units_len)); 308 KASSERT((ng_fec_units[index] & (1 << bit)) == 0, 309 ("%s: unit=%d is free", __FUNCTION__, unit)); 310 ng_fec_units[index] |= (1 << bit); 311 /* 312 * XXX We could think about reducing the size of ng_fec_units[] 313 * XXX here if the last portion is all ones 314 * XXX At least free it if no more units. 315 * Needed if we are eventually be able to unload. 316 */ 317 ng_units_in_use++; 318 if (ng_units_in_use == 0) { /* XXX make SMP safe */ 319 FREE(ng_fec_units, M_NETGRAPH); 320 ng_fec_units_len = 0; 321 ng_fec_units = NULL; 322 } 323 } 324 325 /************************************************************************ 326 INTERFACE STUFF 327 ************************************************************************/ 328 329 static int 330 ng_fec_addport(struct ng_fec_private *priv, char *iface) 331 { 332 struct ng_fec_bundle *b; 333 struct ifnet *ifp, *bifp; 334 struct arpcom *ac; 335 struct ifaddr *ifa; 336 struct sockaddr_dl *sdl; 337 struct ng_fec_portlist *p, *new; 338 339 if (priv == NULL || iface == NULL) 340 return(EINVAL); 341 342 b = &priv->fec_bundle; 343 ifp = &priv->arpcom.ac_if; 344 345 /* Find the interface */ 346 bifp = ifunit(iface); 347 if (bifp == NULL) { 348 printf("fec%d: tried to add iface %s, which " 349 "doesn't seem to exist\n", priv->unit, iface); 350 return(ENOENT); 351 } 352 353 /* See if we have room in the bundle */ 354 if (b->fec_ifcnt == FEC_BUNDLESIZ) { 355 printf("fec%d: can't add new iface; bundle is full\n", 356 priv->unit); 357 return(ENOSPC); 358 } 359 360 /* See if the interface is already in the bundle */ 361 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 362 if (p->fec_if == bifp) { 363 printf("fec%d: iface %s is already in this " 364 "bundle\n", priv->unit, iface); 365 return(EINVAL); 366 } 367 } 368 369 /* Allocate new list entry. */ 370 MALLOC(new, struct ng_fec_portlist *, 371 sizeof(struct ng_fec_portlist), M_NETGRAPH, M_NOWAIT); 372 if (new == NULL) 373 return(ENOMEM); 374 375 ac = (struct arpcom *)bifp; 376 ac->ac_netgraph = priv->node; 377 378 /* 379 * If this is the first interface added to the bundle, 380 * use its MAC address for the virtual interface (and, 381 * by extension, all the other ports in the bundle). 382 */ 383 if (b->fec_ifcnt == 0) { 384 ifa = ifnet_addrs[ifp->if_index - 1]; 385 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 386 bcopy((char *)ac->ac_enaddr, 387 priv->arpcom.ac_enaddr, ETHER_ADDR_LEN); 388 bcopy((char *)ac->ac_enaddr, 389 LLADDR(sdl), ETHER_ADDR_LEN); 390 } 391 392 b->fec_btype = FEC_BTYPE_MAC; 393 new->fec_idx = b->fec_ifcnt; 394 b->fec_ifcnt++; 395 396 /* Save the real MAC address. */ 397 bcopy((char *)ac->ac_enaddr, 398 (char *)&new->fec_mac, ETHER_ADDR_LEN); 399 400 /* Set up phony MAC address. */ 401 ifa = ifnet_addrs[bifp->if_index - 1]; 402 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 403 bcopy(priv->arpcom.ac_enaddr, ac->ac_enaddr, ETHER_ADDR_LEN); 404 bcopy(priv->arpcom.ac_enaddr, LLADDR(sdl), ETHER_ADDR_LEN); 405 406 /* Add to the queue */ 407 new->fec_if = bifp; 408 TAILQ_INSERT_TAIL(&b->ng_fec_ports, new, fec_list); 409 410 return(0); 411 } 412 413 static int 414 ng_fec_delport(struct ng_fec_private *priv, char *iface) 415 { 416 struct ng_fec_bundle *b; 417 struct ifnet *ifp, *bifp; 418 struct arpcom *ac; 419 struct ifaddr *ifa; 420 struct sockaddr_dl *sdl; 421 struct ng_fec_portlist *p; 422 423 if (priv == NULL || iface == NULL) 424 return(EINVAL); 425 426 b = &priv->fec_bundle; 427 ifp = &priv->arpcom.ac_if; 428 429 /* Find the interface */ 430 bifp = ifunit(iface); 431 if (bifp == NULL) { 432 printf("fec%d: tried to remove iface %s, which " 433 "doesn't seem to exist\n", priv->unit, iface); 434 return(ENOENT); 435 } 436 437 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 438 if (p->fec_if == bifp) 439 break; 440 } 441 442 if (p == NULL) { 443 printf("fec%d: tried to remove iface %s which " 444 "is not in our bundle\n", priv->unit, iface); 445 return(EINVAL); 446 } 447 448 /* Stop interface */ 449 bifp->if_flags &= ~IFF_UP; 450 (*bifp->if_ioctl)(bifp, SIOCSIFFLAGS, NULL, NULL); 451 452 /* Restore MAC address. */ 453 ac = (struct arpcom *)bifp; 454 ifa = ifnet_addrs[bifp->if_index - 1]; 455 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 456 bcopy((char *)&p->fec_mac, ac->ac_enaddr, ETHER_ADDR_LEN); 457 bcopy((char *)&p->fec_mac, LLADDR(sdl), ETHER_ADDR_LEN); 458 459 /* Delete port */ 460 TAILQ_REMOVE(&b->ng_fec_ports, p, fec_list); 461 FREE(p, M_NETGRAPH); 462 b->fec_ifcnt--; 463 464 return(0); 465 } 466 467 /* 468 * Pass an ioctl command down to all the underyling interfaces in a 469 * bundle. Used for setting multicast filters and flags. 470 */ 471 472 static int 473 ng_fec_setport(struct ifnet *ifp, u_long command, caddr_t data) 474 { 475 struct ng_fec_private *priv; 476 struct ng_fec_bundle *b; 477 struct ifnet *oifp; 478 struct ng_fec_portlist *p; 479 480 priv = ifp->if_softc; 481 b = &priv->fec_bundle; 482 483 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 484 oifp = p->fec_if; 485 if (oifp != NULL) 486 (*oifp->if_ioctl)(oifp, command, data, NULL); 487 } 488 489 return(0); 490 } 491 492 static void 493 ng_fec_init(void *arg) 494 { 495 struct ng_fec_private *priv; 496 struct ng_fec_bundle *b; 497 struct ifnet *ifp, *bifp; 498 struct ng_fec_portlist *p; 499 500 ifp = arg; 501 priv = ifp->if_softc; 502 b = &priv->fec_bundle; 503 504 if (b->fec_ifcnt == 1 || b->fec_ifcnt == 3) { 505 printf("fec%d: invalid bundle " 506 "size: %d\n", priv->unit, 507 b->fec_ifcnt); 508 return; 509 } 510 511 ng_fec_stop(ifp); 512 513 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 514 bifp = p->fec_if; 515 bifp->if_flags |= IFF_UP; 516 (*bifp->if_ioctl)(bifp, SIOCSIFFLAGS, NULL, NULL); 517 /* mark iface as up and let the monitor check it */ 518 p->fec_ifstat = -1; 519 } 520 521 callout_reset(&priv->fec_timeout, hz, ng_fec_tick, priv); 522 } 523 524 static void 525 ng_fec_stop(struct ifnet *ifp) 526 { 527 struct ng_fec_private *priv; 528 struct ng_fec_bundle *b; 529 struct ifnet *bifp; 530 struct ng_fec_portlist *p; 531 532 priv = ifp->if_softc; 533 b = &priv->fec_bundle; 534 535 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 536 bifp = p->fec_if; 537 bifp->if_flags &= ~IFF_UP; 538 (*bifp->if_ioctl)(bifp, SIOCSIFFLAGS, NULL, NULL); 539 } 540 541 callout_stop(&priv->fec_timeout); 542 } 543 544 static void 545 ng_fec_tick(void *arg) 546 { 547 struct ng_fec_private *priv; 548 struct ng_fec_bundle *b; 549 struct ifmediareq ifmr; 550 struct ifnet *ifp; 551 struct ng_fec_portlist *p; 552 int error = 0; 553 554 priv = arg; 555 b = &priv->fec_bundle; 556 557 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 558 bzero((char *)&ifmr, sizeof(ifmr)); 559 ifp = p->fec_if; 560 error = (*ifp->if_ioctl)(ifp, SIOCGIFMEDIA, (caddr_t)&ifmr, 561 NULL); 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 callout_reset(&priv->fec_timeout, hz, ng_fec_tick, priv); 593 } 594 595 static int 596 ng_fec_ifmedia_upd(struct ifnet *ifp) 597 { 598 return(0); 599 } 600 601 static void ng_fec_ifmedia_sts(struct ifnet *ifp, 602 struct ifmediareq *ifmr) 603 { 604 struct ng_fec_private *priv; 605 struct ng_fec_bundle *b; 606 struct ng_fec_portlist *p; 607 608 priv = ifp->if_softc; 609 b = &priv->fec_bundle; 610 611 ifmr->ifm_status = IFM_AVALID; 612 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 613 if (p->fec_ifstat) { 614 ifmr->ifm_status |= IFM_ACTIVE; 615 break; 616 } 617 } 618 } 619 620 /* 621 * Process an ioctl for the virtual interface 622 */ 623 static int 624 ng_fec_ioctl(struct ifnet *ifp, u_long command, caddr_t data, struct ucred *cr) 625 { 626 struct ifreq *const ifr = (struct ifreq *) data; 627 int s, error = 0; 628 struct ng_fec_private *priv; 629 struct ng_fec_bundle *b; 630 631 priv = ifp->if_softc; 632 b = &priv->fec_bundle; 633 634 #ifdef DEBUG 635 ng_fec_print_ioctl(ifp, command, data); 636 #endif 637 s = splimp(); 638 switch (command) { 639 640 /* These two are mostly handled at a higher layer */ 641 case SIOCSIFADDR: 642 case SIOCGIFADDR: 643 case SIOCSIFMTU: 644 error = ether_ioctl(ifp, command, data); 645 break; 646 647 /* Set flags */ 648 case SIOCSIFFLAGS: 649 /* 650 * If the interface is marked up and stopped, then start it. 651 * If it is marked down and running, then stop it. 652 */ 653 if (ifr->ifr_flags & IFF_UP) { 654 if (!(ifp->if_flags & IFF_RUNNING)) { 655 /* Sanity. */ 656 if (b->fec_ifcnt == 1 || b->fec_ifcnt == 3) { 657 printf("fec%d: invalid bundle " 658 "size: %d\n", priv->unit, 659 b->fec_ifcnt); 660 error = EINVAL; 661 break; 662 } 663 ifp->if_flags &= ~(IFF_OACTIVE); 664 ifp->if_flags |= IFF_RUNNING; 665 ng_fec_init(ifp); 666 } 667 /* 668 * Bubble down changes in promisc mode to 669 * underlying interfaces. 670 */ 671 if ((ifp->if_flags & IFF_PROMISC) != 672 (priv->if_flags & IFF_PROMISC)) { 673 ng_fec_setport(ifp, command, data); 674 priv->if_flags = ifp->if_flags; 675 } 676 } else { 677 if (ifp->if_flags & IFF_RUNNING) 678 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 679 ng_fec_stop(ifp); 680 } 681 break; 682 683 case SIOCADDMULTI: 684 case SIOCDELMULTI: 685 ng_fec_setport(ifp, command, data); 686 error = 0; 687 break; 688 case SIOCGIFMEDIA: 689 case SIOCSIFMEDIA: 690 error = ifmedia_ioctl(ifp, ifr, &priv->ifmedia, command); 691 break; 692 /* Stuff that's not supported */ 693 case SIOCSIFPHYS: 694 error = EOPNOTSUPP; 695 break; 696 697 default: 698 error = EINVAL; 699 break; 700 } 701 (void) splx(s); 702 return (error); 703 } 704 705 /* 706 * This routine spies on mbufs passing through ether_input(). If 707 * they come from one of the interfaces that are aggregated into 708 * our bundle, we fix up the ifnet pointer and increment our 709 * packet counters so that it looks like the frames are actually 710 * coming from us. 711 */ 712 static void 713 ng_fec_input(struct ifnet *ifp, struct mbuf **m0, 714 struct ether_header *eh) 715 { 716 struct ng_node *node; 717 struct ng_fec_private *priv; 718 struct ng_fec_bundle *b; 719 struct mbuf *m; 720 struct ifnet *bifp; 721 struct ng_fec_portlist *p; 722 723 /* Sanity check */ 724 if (ifp == NULL || m0 == NULL || eh == NULL) 725 return; 726 727 node = IFP2NG(ifp); 728 729 /* Sanity check part II */ 730 if (node == NULL) 731 return; 732 733 priv = node->private; 734 b = &priv->fec_bundle; 735 bifp = &priv->arpcom.ac_if; 736 737 m = *m0; 738 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 739 if (p->fec_if == m->m_pkthdr.rcvif) 740 break; 741 } 742 743 /* Wasn't meant for us; leave this frame alone. */ 744 if (p == NULL) 745 return; 746 747 /* Pretend this is our frame. */ 748 m->m_pkthdr.rcvif = bifp; 749 bifp->if_ipackets++; 750 bifp->if_ibytes += m->m_pkthdr.len + sizeof(struct ether_header); 751 752 /* Check for a BPF tap */ 753 if (bifp->if_bpf != NULL) { 754 struct m_hdr mh; 755 756 /* This kludge is OK; BPF treats the "mbuf" as read-only */ 757 mh.mh_next = m; 758 mh.mh_data = (char *)eh; 759 mh.mh_len = ETHER_HDR_LEN; 760 bpf_mtap(bifp, (struct mbuf *)&mh); 761 } 762 } 763 764 /* 765 * Take a quick peek at the packet and see if it's ok for us to use 766 * the inet or inet6 hash methods on it, if they're enabled. We do 767 * this by setting flags in the mbuf header. Once we've made up our 768 * mind what to do, we pass the frame to ether_output() for further 769 * processing. 770 */ 771 772 static int 773 ng_fec_output(struct ifnet *ifp, struct mbuf *m, 774 struct sockaddr *dst, struct rtentry *rt0) 775 { 776 const priv_p priv = (priv_p) ifp->if_softc; 777 struct ng_fec_bundle *b; 778 int error; 779 780 /* Check interface flags */ 781 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) { 782 m_freem(m); 783 return (ENETDOWN); 784 } 785 786 b = &priv->fec_bundle; 787 788 switch (b->fec_btype) { 789 case FEC_BTYPE_MAC: 790 m->m_flags |= M_FEC_MAC; 791 break; 792 #ifdef INET 793 case FEC_BTYPE_INET: 794 /* 795 * We can't use the INET address port selection 796 * scheme if this isn't an INET packet. 797 */ 798 if (dst->sa_family == AF_INET) 799 m->m_flags |= M_FEC_INET; 800 #ifdef INET6 801 else if (dst->sa_family == AF_INET6) 802 m->m_flags |= M_FEC_INET6; 803 #endif 804 else { 805 #ifdef DEBUG 806 printf("%s: can't do inet aggregation of non " 807 "inet packet\n", ifp->if_xname); 808 #endif 809 m->m_flags |= M_FEC_MAC; 810 } 811 break; 812 #endif 813 default: 814 printf("%s: bogus hash type: %d\n", ifp->if_xname, 815 b->fec_btype); 816 m_freem(m); 817 return(EINVAL); 818 break; 819 } 820 821 /* 822 * Pass the frame to ether_output() for all the protocol 823 * handling. This will put the ethernet header on the packet 824 * for us. 825 */ 826 priv->if_error = 0; 827 error = priv->real_if_output(ifp, m, dst, rt0); 828 if (priv->if_error && !error) 829 error = priv->if_error; 830 831 return(error); 832 } 833 834 /* 835 * Apply a hash to the source and destination addresses in the packet 836 * in order to select an interface. Also check link status and handle 837 * dead links accordingly. 838 */ 839 840 static int 841 ng_fec_choose_port(struct ng_fec_bundle *b, 842 struct mbuf *m, struct ifnet **ifp) 843 { 844 struct ether_header *eh; 845 struct mbuf *m0; 846 #ifdef INET 847 struct ip *ip; 848 #ifdef INET6 849 struct ip6_hdr *ip6; 850 #endif 851 #endif 852 853 struct ng_fec_portlist *p; 854 int port = 0, mask; 855 856 /* 857 * If there are only two ports, mask off all but the 858 * last bit for XORing. If there are 4, mask off all 859 * but the last 2 bits. 860 */ 861 mask = b->fec_ifcnt == 2 ? 0x1 : 0x3; 862 eh = mtod(m, struct ether_header *); 863 #ifdef INET 864 ip = (struct ip *)(mtod(m, char *) + 865 sizeof(struct ether_header)); 866 #ifdef INET6 867 ip6 = (struct ip6_hdr *)(mtod(m, char *) + 868 sizeof(struct ether_header)); 869 #endif 870 #endif 871 872 /* 873 * The fg_fec_output() routine is supposed to leave a 874 * flag for us in the mbuf that tells us what hash to 875 * use, but sometimes a new mbuf is prepended to the 876 * chain, so we have to search every mbuf in the chain 877 * to find the flags. 878 */ 879 m0 = m; 880 while (m0) { 881 if (m0->m_flags & (M_FEC_MAC|M_FEC_INET|M_FEC_INET6)) 882 break; 883 m0 = m0->m_next; 884 } 885 if (m0 == NULL) 886 return(EINVAL); 887 888 switch (m0->m_flags & (M_FEC_MAC|M_FEC_INET|M_FEC_INET6)) { 889 case M_FEC_MAC: 890 port = (eh->ether_dhost[5] ^ 891 eh->ether_shost[5]) & mask; 892 break; 893 #ifdef INET 894 case M_FEC_INET: 895 port = (ntohl(ip->ip_dst.s_addr) ^ 896 ntohl(ip->ip_src.s_addr)) & mask; 897 break; 898 #ifdef INET6 899 case M_FEC_INET6: 900 port = (ip6->ip6_dst.s6_addr[15] ^ 901 ip6->ip6_dst.s6_addr[15]) & mask; 902 break; 903 #endif 904 #endif 905 default: 906 return(EINVAL); 907 break; 908 } 909 910 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 911 if (port == p->fec_idx) 912 break; 913 } 914 915 /* 916 * Now that we've chosen a port, make sure it's 917 * alive. If it's not alive, cycle through the bundle 918 * looking for a port that is alive. If we don't find 919 * any, return an error. 920 */ 921 if (p->fec_ifstat != 1) { 922 struct ng_fec_portlist *n = NULL; 923 924 n = TAILQ_NEXT(p, fec_list); 925 if (n == NULL) 926 n = TAILQ_FIRST(&b->ng_fec_ports); 927 while (n != p) { 928 if (n->fec_ifstat == 1) 929 break; 930 n = TAILQ_NEXT(n, fec_list); 931 if (n == NULL) 932 n = TAILQ_FIRST(&b->ng_fec_ports); 933 } 934 if (n == p) 935 return(EAGAIN); 936 p = n; 937 } 938 939 *ifp = p->fec_if; 940 941 return(0); 942 } 943 944 /* 945 * Now that the packet has been run through ether_output(), yank it 946 * off our own send queue and stick it on the queue for the appropriate 947 * underlying physical interface. Note that if the interface's send 948 * queue is full, we save an error status in our private netgraph 949 * space which will eventually be handed up to ng_fec_output(), which 950 * will return it to the rest of the IP stack. We need to do this 951 * in order to duplicate the effect of ether_output() returning ENOBUFS 952 * when it detects that an interface's send queue is full. There's no 953 * other way to signal the error status from here since the if_start() 954 * routine is spec'ed to return void. 955 * 956 * Once the frame is queued, we call ether_output_frame() to initiate 957 * transmission. 958 */ 959 static void 960 ng_fec_start(struct ifnet *ifp) 961 { 962 struct ng_fec_private *priv; 963 struct ng_fec_bundle *b; 964 struct ifnet *oifp = NULL; 965 struct mbuf *m0; 966 int error; 967 968 priv = ifp->if_softc; 969 b = &priv->fec_bundle; 970 971 IF_DEQUEUE(&ifp->if_snd, m0); 972 if (m0 == NULL) 973 return; 974 975 if (ifp->if_bpf) 976 bpf_mtap(ifp, m0); 977 978 /* Queue up packet on the proper port. */ 979 error = ng_fec_choose_port(b, m0, &oifp); 980 if (error) { 981 ifp->if_ierrors++; 982 m_freem(m0); 983 priv->if_error = ENOBUFS; 984 return; 985 } 986 ifp->if_opackets++; 987 988 priv->if_error = ether_output_frame(oifp, m0); 989 } 990 991 #ifdef DEBUG 992 /* 993 * Display an ioctl to the virtual interface 994 */ 995 996 static void 997 ng_fec_print_ioctl(struct ifnet *ifp, int command, caddr_t data) 998 { 999 char *str; 1000 1001 switch (command & IOC_DIRMASK) { 1002 case IOC_VOID: 1003 str = "IO"; 1004 break; 1005 case IOC_OUT: 1006 str = "IOR"; 1007 break; 1008 case IOC_IN: 1009 str = "IOW"; 1010 break; 1011 case IOC_INOUT: 1012 str = "IORW"; 1013 break; 1014 default: 1015 str = "IO??"; 1016 } 1017 log(LOG_DEBUG, "%s: %s('%c', %d, char[%d])\n", 1018 ifp->if_xname, 1019 str, 1020 IOCGROUP(command), 1021 command & 0xff, 1022 IOCPARM_LEN(command)); 1023 } 1024 #endif /* DEBUG */ 1025 1026 /************************************************************************ 1027 NETGRAPH NODE STUFF 1028 ************************************************************************/ 1029 1030 /* 1031 * Constructor for a node 1032 */ 1033 static int 1034 ng_fec_constructor(node_p *nodep) 1035 { 1036 char ifname[NG_FEC_FEC_NAME_MAX + 1]; 1037 struct ifnet *ifp; 1038 node_p node; 1039 priv_p priv; 1040 struct ng_fec_bundle *b; 1041 int error = 0; 1042 1043 /* Allocate node and interface private structures */ 1044 MALLOC(priv, priv_p, sizeof(*priv), M_NETGRAPH, M_NOWAIT); 1045 if (priv == NULL) 1046 return (ENOMEM); 1047 bzero(priv, sizeof(*priv)); 1048 1049 ifp = &priv->arpcom.ac_if; 1050 b = &priv->fec_bundle; 1051 1052 /* Link them together */ 1053 ifp->if_softc = priv; 1054 1055 /* Get an interface unit number */ 1056 if ((error = ng_fec_get_unit(&priv->unit)) != 0) { 1057 FREE(ifp, M_NETGRAPH); 1058 FREE(priv, M_NETGRAPH); 1059 return (error); 1060 } 1061 1062 /* Call generic node constructor */ 1063 if ((error = ng_make_node_common(&typestruct, nodep)) != 0) { 1064 ng_fec_free_unit(priv->unit); 1065 FREE(ifp, M_NETGRAPH); 1066 FREE(priv, M_NETGRAPH); 1067 return (error); 1068 } 1069 node = *nodep; 1070 1071 /* Link together node and private info */ 1072 node->private = priv; 1073 priv->node = node; 1074 priv->arpcom.ac_netgraph = node; 1075 1076 /* Initialize interface structure */ 1077 if_initname(ifp, NG_FEC_FEC_NAME, priv->unit); 1078 ifp->if_start = ng_fec_start; 1079 ifp->if_ioctl = ng_fec_ioctl; 1080 ifp->if_init = ng_fec_init; 1081 ifp->if_watchdog = NULL; 1082 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; 1083 ifp->if_mtu = NG_FEC_MTU_DEFAULT; 1084 ifp->if_flags = (IFF_SIMPLEX|IFF_BROADCAST|IFF_MULTICAST); 1085 ifp->if_type = IFT_PROPVIRTUAL; /* XXX */ 1086 ifp->if_addrlen = 0; /* XXX */ 1087 ifp->if_hdrlen = 0; /* XXX */ 1088 ifp->if_baudrate = 100000000; /* XXX */ 1089 TAILQ_INIT(&ifp->if_addrhead); 1090 1091 /* Give this node the same name as the interface (if possible) */ 1092 bzero(ifname, sizeof(ifname)); 1093 strlcpy(ifname, ifp->if_xname, sizeof(ifname)); 1094 if (ng_name_node(node, ifname) != 0) 1095 log(LOG_WARNING, "%s: can't acquire netgraph name\n", ifname); 1096 1097 /* Grab hold of the ether_input pipe. */ 1098 if (ng_ether_input_p == NULL) 1099 ng_ether_input_p = ng_fec_input; 1100 1101 /* Attach the interface */ 1102 ether_ifattach(ifp, priv->arpcom.ac_enaddr); 1103 priv->real_if_output = ifp->if_output; 1104 ifp->if_output = ng_fec_output; 1105 callout_init(&priv->fec_timeout); 1106 1107 TAILQ_INIT(&b->ng_fec_ports); 1108 b->fec_ifcnt = 0; 1109 1110 ifmedia_init(&priv->ifmedia, 0, 1111 ng_fec_ifmedia_upd, ng_fec_ifmedia_sts); 1112 ifmedia_add(&priv->ifmedia, IFM_ETHER|IFM_NONE, 0, NULL); 1113 ifmedia_set(&priv->ifmedia, IFM_ETHER|IFM_NONE); 1114 1115 /* Done */ 1116 return (0); 1117 } 1118 1119 /* 1120 * Receive a control message 1121 */ 1122 static int 1123 ng_fec_rcvmsg(node_p node, struct ng_mesg *msg, 1124 const char *retaddr, struct ng_mesg **rptr) 1125 { 1126 const priv_p priv = node->private; 1127 struct ng_fec_bundle *b; 1128 struct ng_mesg *resp = NULL; 1129 char *ifname; 1130 int error = 0; 1131 1132 b = &priv->fec_bundle; 1133 1134 switch (msg->header.typecookie) { 1135 case NGM_FEC_COOKIE: 1136 switch (msg->header.cmd) { 1137 case NGM_FEC_ADD_IFACE: 1138 ifname = msg->data; 1139 error = ng_fec_addport(priv, ifname); 1140 break; 1141 case NGM_FEC_DEL_IFACE: 1142 ifname = msg->data; 1143 error = ng_fec_delport(priv, ifname); 1144 break; 1145 case NGM_FEC_SET_MODE_MAC: 1146 b->fec_btype = FEC_BTYPE_MAC; 1147 break; 1148 #ifdef INET 1149 case NGM_FEC_SET_MODE_INET: 1150 b->fec_btype = FEC_BTYPE_INET; 1151 break; 1152 #ifdef INET6 1153 case NGM_FEC_SET_MODE_INET6: 1154 b->fec_btype = FEC_BTYPE_INET6; 1155 break; 1156 #endif 1157 #endif 1158 default: 1159 error = EINVAL; 1160 break; 1161 } 1162 break; 1163 default: 1164 error = EINVAL; 1165 break; 1166 } 1167 if (rptr) 1168 *rptr = resp; 1169 else if (resp) 1170 FREE(resp, M_NETGRAPH); 1171 FREE(msg, M_NETGRAPH); 1172 return (error); 1173 } 1174 1175 /* 1176 * Shutdown and remove the node and its associated interface. 1177 */ 1178 static int 1179 ng_fec_rmnode(node_p node) 1180 { 1181 const priv_p priv = node->private; 1182 struct ng_fec_bundle *b; 1183 struct ng_fec_portlist *p; 1184 char ifname[IFNAMSIZ]; 1185 1186 b = &priv->fec_bundle; 1187 ng_fec_stop(&priv->arpcom.ac_if); 1188 1189 while (!TAILQ_EMPTY(&b->ng_fec_ports)) { 1190 p = TAILQ_FIRST(&b->ng_fec_ports); 1191 sprintf(ifname, "%s", 1192 p->fec_if->if_xname); /* XXX: strings */ 1193 ng_fec_delport(priv, ifname); 1194 } 1195 1196 ng_cutlinks(node); 1197 ng_unname(node); 1198 if (ng_ether_input_p != NULL) 1199 ng_ether_input_p = NULL; 1200 ether_ifdetach(&priv->arpcom.ac_if); 1201 ifmedia_removeall(&priv->ifmedia); 1202 ng_fec_free_unit(priv->unit); 1203 FREE(priv, M_NETGRAPH); 1204 node->private = NULL; 1205 ng_unref(node); 1206 return (0); 1207 } 1208