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 1.15 2005/06/03 23:31:36 joerg 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 #include <sys/thread2.h> 103 104 #include <net/if.h> 105 #include <net/if_types.h> 106 #include <net/if_arp.h> 107 #include <net/if_dl.h> 108 #include <net/if_media.h> 109 #include <net/intrq.h> 110 #include <net/bpf.h> 111 #include <net/ethernet.h> 112 113 #include "opt_inet.h" 114 #include "opt_inet6.h" 115 116 #include <netinet/in.h> 117 #ifdef INET 118 #include <netinet/in_systm.h> 119 #include <netinet/ip.h> 120 #endif 121 122 #ifdef INET6 123 #include <netinet/ip6.h> 124 #endif 125 126 #include <netgraph/ng_message.h> 127 #include <netgraph/netgraph.h> 128 #include <netgraph/ng_parse.h> 129 #include "ng_fec.h" 130 131 #define IFP2NG(ifp) ((struct ng_node *)((struct arpcom *)(ifp))->ac_netgraph) 132 #define FEC_INC(x, y) (x) = (x + 1) % y 133 134 /* 135 * Current fast etherchannel implementations use either 2 or 4 136 * ports, so for now we limit the maximum bundle size to 4 interfaces. 137 */ 138 #define FEC_BUNDLESIZ 4 139 140 struct ng_fec_portlist { 141 struct ifnet *fec_if; 142 int fec_idx; 143 int fec_ifstat; 144 struct ether_addr fec_mac; 145 TAILQ_ENTRY(ng_fec_portlist) fec_list; 146 }; 147 148 struct ng_fec_bundle { 149 TAILQ_HEAD(,ng_fec_portlist) ng_fec_ports; 150 int fec_ifcnt; 151 int fec_btype; 152 }; 153 154 #define FEC_BTYPE_MAC 0x01 155 #define FEC_BTYPE_INET 0x02 156 #define FEC_BTYPE_INET6 0x03 157 158 /* Node private data */ 159 struct ng_fec_private { 160 struct arpcom arpcom; 161 struct ifmedia ifmedia; 162 int if_flags; 163 int if_error; /* XXX */ 164 int unit; /* Interface unit number */ 165 node_p node; /* Our netgraph node */ 166 struct ng_fec_bundle fec_bundle;/* Aggregate bundle */ 167 struct callout fec_timeout; /* callout for ticker */ 168 int (*real_if_output)(struct ifnet *, struct mbuf *, 169 struct sockaddr *, struct rtentry *); 170 }; 171 typedef struct ng_fec_private *priv_p; 172 173 /* Interface methods */ 174 static void ng_fec_input(struct ifnet *, struct mbuf **, 175 struct ether_header *); 176 static void ng_fec_start(struct ifnet *ifp); 177 static int ng_fec_choose_port(struct ng_fec_bundle *b, 178 struct mbuf *m, struct ifnet **ifp); 179 static int ng_fec_setport(struct ifnet *ifp, u_long cmd, caddr_t data); 180 static void ng_fec_init(void *arg); 181 static void ng_fec_stop(struct ifnet *ifp); 182 static int ng_fec_ifmedia_upd(struct ifnet *ifp); 183 static void ng_fec_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr); 184 static int ng_fec_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, 185 struct ucred *); 186 static int ng_fec_output(struct ifnet *ifp, struct mbuf *m0, 187 struct sockaddr *dst, struct rtentry *rt0); 188 static void ng_fec_tick(void *arg); 189 static int ng_fec_addport(struct ng_fec_private *priv, char *iface); 190 static int ng_fec_delport(struct ng_fec_private *priv, char *iface); 191 192 #ifdef DEBUG 193 static void ng_fec_print_ioctl(struct ifnet *ifp, int cmd, caddr_t data); 194 #endif 195 196 /* Netgraph methods */ 197 static ng_constructor_t ng_fec_constructor; 198 static ng_rcvmsg_t ng_fec_rcvmsg; 199 static ng_shutdown_t ng_fec_rmnode; 200 201 /* List of commands and how to convert arguments to/from ASCII */ 202 static const struct ng_cmdlist ng_fec_cmds[] = { 203 { 204 NGM_FEC_COOKIE, 205 NGM_FEC_ADD_IFACE, 206 "add_iface", 207 &ng_parse_string_type, 208 NULL, 209 }, 210 { 211 NGM_FEC_COOKIE, 212 NGM_FEC_DEL_IFACE, 213 "del_iface", 214 &ng_parse_string_type, 215 NULL, 216 }, 217 { 218 NGM_FEC_COOKIE, 219 NGM_FEC_SET_MODE_MAC, 220 "set_mode_mac", 221 NULL, 222 NULL, 223 }, 224 { 225 NGM_FEC_COOKIE, 226 NGM_FEC_SET_MODE_INET, 227 "set_mode_inet", 228 NULL, 229 NULL, 230 }, 231 { 0 } 232 }; 233 234 /* Node type descriptor */ 235 static struct ng_type typestruct = { 236 NG_VERSION, 237 NG_FEC_NODE_TYPE, 238 NULL, 239 ng_fec_constructor, 240 ng_fec_rcvmsg, 241 ng_fec_rmnode, 242 NULL, 243 NULL, 244 NULL, 245 NULL, 246 NULL, 247 NULL, 248 ng_fec_cmds 249 }; 250 NETGRAPH_INIT(fec, &typestruct); 251 252 /* We keep a bitmap indicating which unit numbers are free. 253 One means the unit number is free, zero means it's taken. */ 254 static int *ng_fec_units = NULL; 255 static int ng_fec_units_len = 0; 256 static int ng_units_in_use = 0; 257 258 #define UNITS_BITSPERWORD (sizeof(*ng_fec_units) * NBBY) 259 260 /* 261 * Find the first free unit number for a new interface. 262 * Increase the size of the unit bitmap as necessary. 263 */ 264 static __inline__ int 265 ng_fec_get_unit(int *unit) 266 { 267 int index, bit; 268 269 for (index = 0; index < ng_fec_units_len 270 && ng_fec_units[index] == 0; index++); 271 if (index == ng_fec_units_len) { /* extend array */ 272 int i, *newarray, newlen; 273 274 newlen = (2 * ng_fec_units_len) + 4; 275 MALLOC(newarray, int *, newlen * sizeof(*ng_fec_units), 276 M_NETGRAPH, M_NOWAIT); 277 if (newarray == NULL) 278 return (ENOMEM); 279 bcopy(ng_fec_units, newarray, 280 ng_fec_units_len * sizeof(*ng_fec_units)); 281 for (i = ng_fec_units_len; i < newlen; i++) 282 newarray[i] = ~0; 283 if (ng_fec_units != NULL) 284 FREE(ng_fec_units, M_NETGRAPH); 285 ng_fec_units = newarray; 286 ng_fec_units_len = newlen; 287 } 288 bit = ffs(ng_fec_units[index]) - 1; 289 KASSERT(bit >= 0 && bit <= UNITS_BITSPERWORD - 1, 290 ("%s: word=%d bit=%d", __func__, ng_fec_units[index], bit)); 291 ng_fec_units[index] &= ~(1 << bit); 292 *unit = (index * UNITS_BITSPERWORD) + bit; 293 ng_units_in_use++; 294 return (0); 295 } 296 297 /* 298 * Free a no longer needed unit number. 299 */ 300 static __inline__ void 301 ng_fec_free_unit(int unit) 302 { 303 int index, bit; 304 305 index = unit / UNITS_BITSPERWORD; 306 bit = unit % UNITS_BITSPERWORD; 307 KASSERT(index < ng_fec_units_len, 308 ("%s: unit=%d len=%d", __func__, unit, ng_fec_units_len)); 309 KASSERT((ng_fec_units[index] & (1 << bit)) == 0, 310 ("%s: unit=%d is free", __func__, unit)); 311 ng_fec_units[index] |= (1 << bit); 312 /* 313 * XXX We could think about reducing the size of ng_fec_units[] 314 * XXX here if the last portion is all ones 315 * XXX At least free it if no more units. 316 * Needed if we are eventually be able to unload. 317 */ 318 ng_units_in_use++; 319 if (ng_units_in_use == 0) { /* XXX make SMP safe */ 320 FREE(ng_fec_units, M_NETGRAPH); 321 ng_fec_units_len = 0; 322 ng_fec_units = NULL; 323 } 324 } 325 326 /************************************************************************ 327 INTERFACE STUFF 328 ************************************************************************/ 329 330 static int 331 ng_fec_addport(struct ng_fec_private *priv, char *iface) 332 { 333 struct ng_fec_bundle *b; 334 struct ifnet *ifp, *bifp; 335 struct arpcom *ac; 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 sdl = IF_LLSOCKADDR(ifp); 385 bcopy((char *)ac->ac_enaddr, 386 priv->arpcom.ac_enaddr, ETHER_ADDR_LEN); 387 bcopy((char *)ac->ac_enaddr, 388 LLADDR(sdl), ETHER_ADDR_LEN); 389 } 390 391 b->fec_btype = FEC_BTYPE_MAC; 392 new->fec_idx = b->fec_ifcnt; 393 b->fec_ifcnt++; 394 395 /* Save the real MAC address. */ 396 bcopy((char *)ac->ac_enaddr, 397 (char *)&new->fec_mac, ETHER_ADDR_LEN); 398 399 /* Set up phony MAC address. */ 400 sdl = IF_LLSOCKADDR(bifp); 401 bcopy(priv->arpcom.ac_enaddr, ac->ac_enaddr, ETHER_ADDR_LEN); 402 bcopy(priv->arpcom.ac_enaddr, LLADDR(sdl), ETHER_ADDR_LEN); 403 404 /* Add to the queue */ 405 new->fec_if = bifp; 406 TAILQ_INSERT_TAIL(&b->ng_fec_ports, new, fec_list); 407 408 return(0); 409 } 410 411 static int 412 ng_fec_delport(struct ng_fec_private *priv, char *iface) 413 { 414 struct ng_fec_bundle *b; 415 struct ifnet *ifp, *bifp; 416 struct arpcom *ac; 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, NULL); 448 449 /* Restore MAC address. */ 450 ac = (struct arpcom *)bifp; 451 sdl = IF_LLSOCKADDR(bifp); 452 bcopy((char *)&p->fec_mac, ac->ac_enaddr, ETHER_ADDR_LEN); 453 bcopy((char *)&p->fec_mac, LLADDR(sdl), ETHER_ADDR_LEN); 454 455 /* Delete port */ 456 TAILQ_REMOVE(&b->ng_fec_ports, p, fec_list); 457 FREE(p, M_NETGRAPH); 458 b->fec_ifcnt--; 459 460 return(0); 461 } 462 463 /* 464 * Pass an ioctl command down to all the underyling interfaces in a 465 * bundle. Used for setting multicast filters and flags. 466 */ 467 468 static int 469 ng_fec_setport(struct ifnet *ifp, u_long command, caddr_t data) 470 { 471 struct ng_fec_private *priv; 472 struct ng_fec_bundle *b; 473 struct ifnet *oifp; 474 struct ng_fec_portlist *p; 475 476 priv = ifp->if_softc; 477 b = &priv->fec_bundle; 478 479 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 480 oifp = p->fec_if; 481 if (oifp != NULL) 482 (*oifp->if_ioctl)(oifp, command, data, NULL); 483 } 484 485 return(0); 486 } 487 488 static void 489 ng_fec_init(void *arg) 490 { 491 struct ng_fec_private *priv; 492 struct ng_fec_bundle *b; 493 struct ifnet *ifp, *bifp; 494 struct ng_fec_portlist *p; 495 496 ifp = arg; 497 priv = ifp->if_softc; 498 b = &priv->fec_bundle; 499 500 if (b->fec_ifcnt == 1 || b->fec_ifcnt == 3) { 501 printf("fec%d: invalid bundle " 502 "size: %d\n", priv->unit, 503 b->fec_ifcnt); 504 return; 505 } 506 507 ng_fec_stop(ifp); 508 509 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 510 bifp = p->fec_if; 511 bifp->if_flags |= IFF_UP; 512 (*bifp->if_ioctl)(bifp, SIOCSIFFLAGS, NULL, NULL); 513 /* mark iface as up and let the monitor check it */ 514 p->fec_ifstat = -1; 515 } 516 517 callout_reset(&priv->fec_timeout, hz, ng_fec_tick, priv); 518 } 519 520 static void 521 ng_fec_stop(struct ifnet *ifp) 522 { 523 struct ng_fec_private *priv; 524 struct ng_fec_bundle *b; 525 struct ifnet *bifp; 526 struct ng_fec_portlist *p; 527 528 priv = ifp->if_softc; 529 b = &priv->fec_bundle; 530 531 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 532 bifp = p->fec_if; 533 bifp->if_flags &= ~IFF_UP; 534 (*bifp->if_ioctl)(bifp, SIOCSIFFLAGS, NULL, NULL); 535 } 536 537 callout_stop(&priv->fec_timeout); 538 } 539 540 static void 541 ng_fec_tick(void *arg) 542 { 543 struct ng_fec_private *priv; 544 struct ng_fec_bundle *b; 545 struct ifmediareq ifmr; 546 struct ifnet *ifp; 547 struct ng_fec_portlist *p; 548 int error = 0; 549 550 priv = arg; 551 b = &priv->fec_bundle; 552 553 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 554 bzero((char *)&ifmr, sizeof(ifmr)); 555 ifp = p->fec_if; 556 error = (*ifp->if_ioctl)(ifp, SIOCGIFMEDIA, (caddr_t)&ifmr, 557 NULL); 558 if (error) { 559 printf("fec%d: failed to check status " 560 "of link %s\n", priv->unit, ifp->if_xname); 561 continue; 562 } 563 564 if (ifmr.ifm_status & IFM_AVALID && 565 IFM_TYPE(ifmr.ifm_active) == IFM_ETHER) { 566 if (ifmr.ifm_status & IFM_ACTIVE) { 567 if (p->fec_ifstat == -1 || 568 p->fec_ifstat == 0) { 569 p->fec_ifstat = 1; 570 printf("fec%d: port %s in bundle " 571 "is up\n", priv->unit, 572 ifp->if_xname); 573 } 574 } else { 575 if (p->fec_ifstat == -1 || 576 p->fec_ifstat == 1) { 577 p->fec_ifstat = 0; 578 printf("fec%d: port %s in bundle " 579 "is down\n", priv->unit, 580 ifp->if_xname); 581 } 582 } 583 } 584 } 585 586 ifp = &priv->arpcom.ac_if; 587 if (ifp->if_flags & IFF_RUNNING) 588 callout_reset(&priv->fec_timeout, hz, ng_fec_tick, priv); 589 } 590 591 static int 592 ng_fec_ifmedia_upd(struct ifnet *ifp) 593 { 594 return(0); 595 } 596 597 static void ng_fec_ifmedia_sts(struct ifnet *ifp, 598 struct ifmediareq *ifmr) 599 { 600 struct ng_fec_private *priv; 601 struct ng_fec_bundle *b; 602 struct ng_fec_portlist *p; 603 604 priv = ifp->if_softc; 605 b = &priv->fec_bundle; 606 607 ifmr->ifm_status = IFM_AVALID; 608 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 609 if (p->fec_ifstat) { 610 ifmr->ifm_status |= IFM_ACTIVE; 611 break; 612 } 613 } 614 } 615 616 /* 617 * Process an ioctl for the virtual interface 618 */ 619 static int 620 ng_fec_ioctl(struct ifnet *ifp, u_long command, caddr_t data, struct ucred *cr) 621 { 622 struct ifreq *const ifr = (struct ifreq *) data; 623 int error = 0; 624 struct ng_fec_private *priv; 625 struct ng_fec_bundle *b; 626 627 priv = ifp->if_softc; 628 b = &priv->fec_bundle; 629 630 #ifdef DEBUG 631 ng_fec_print_ioctl(ifp, command, data); 632 #endif 633 crit_enter(); 634 switch (command) { 635 636 /* These two are mostly handled at a higher layer */ 637 case SIOCSIFADDR: 638 case SIOCGIFADDR: 639 case SIOCSIFMTU: 640 error = ether_ioctl(ifp, command, data); 641 break; 642 643 /* Set flags */ 644 case SIOCSIFFLAGS: 645 /* 646 * If the interface is marked up and stopped, then start it. 647 * If it is marked down and running, then stop it. 648 */ 649 if (ifr->ifr_flags & IFF_UP) { 650 if (!(ifp->if_flags & IFF_RUNNING)) { 651 /* Sanity. */ 652 if (b->fec_ifcnt == 1 || b->fec_ifcnt == 3) { 653 printf("fec%d: invalid bundle " 654 "size: %d\n", priv->unit, 655 b->fec_ifcnt); 656 error = EINVAL; 657 break; 658 } 659 ifp->if_flags &= ~(IFF_OACTIVE); 660 ifp->if_flags |= IFF_RUNNING; 661 ng_fec_init(ifp); 662 } 663 /* 664 * Bubble down changes in promisc mode to 665 * underlying interfaces. 666 */ 667 if ((ifp->if_flags & IFF_PROMISC) != 668 (priv->if_flags & IFF_PROMISC)) { 669 ng_fec_setport(ifp, command, data); 670 priv->if_flags = ifp->if_flags; 671 } 672 } else { 673 if (ifp->if_flags & IFF_RUNNING) 674 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 675 ng_fec_stop(ifp); 676 } 677 break; 678 679 case SIOCADDMULTI: 680 case SIOCDELMULTI: 681 ng_fec_setport(ifp, command, data); 682 error = 0; 683 break; 684 case SIOCGIFMEDIA: 685 case SIOCSIFMEDIA: 686 error = ifmedia_ioctl(ifp, ifr, &priv->ifmedia, command); 687 break; 688 /* Stuff that's not supported */ 689 case SIOCSIFPHYS: 690 error = EOPNOTSUPP; 691 break; 692 693 default: 694 error = EINVAL; 695 break; 696 } 697 crit_exit(); 698 return (error); 699 } 700 701 /* 702 * This routine spies on mbufs passing through ether_input(). If 703 * they come from one of the interfaces that are aggregated into 704 * our bundle, we fix up the ifnet pointer and increment our 705 * packet counters so that it looks like the frames are actually 706 * coming from us. 707 */ 708 static void 709 ng_fec_input(struct ifnet *ifp, struct mbuf **m0, 710 struct ether_header *eh) 711 { 712 struct ng_node *node; 713 struct ng_fec_private *priv; 714 struct ng_fec_bundle *b; 715 struct mbuf *m; 716 struct ifnet *bifp; 717 struct ng_fec_portlist *p; 718 719 /* Sanity check */ 720 if (ifp == NULL || m0 == NULL || eh == NULL) 721 return; 722 723 node = IFP2NG(ifp); 724 725 /* Sanity check part II */ 726 if (node == NULL) 727 return; 728 729 priv = node->private; 730 b = &priv->fec_bundle; 731 bifp = &priv->arpcom.ac_if; 732 733 m = *m0; 734 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 735 if (p->fec_if == m->m_pkthdr.rcvif) 736 break; 737 } 738 739 /* Wasn't meant for us; leave this frame alone. */ 740 if (p == NULL) 741 return; 742 743 /* Pretend this is our frame. */ 744 m->m_pkthdr.rcvif = bifp; 745 bifp->if_ipackets++; 746 bifp->if_ibytes += m->m_pkthdr.len + sizeof(struct ether_header); 747 748 if (bifp->if_bpf) 749 bpf_ptap(bifp->if_bpf, m, eh, ETHER_HDR_LEN); 750 } 751 752 /* 753 * Take a quick peek at the packet and see if it's ok for us to use 754 * the inet or inet6 hash methods on it, if they're enabled. We do 755 * this by setting flags in the mbuf header. Once we've made up our 756 * mind what to do, we pass the frame to ether_output() for further 757 * processing. 758 */ 759 760 static int 761 ng_fec_output(struct ifnet *ifp, struct mbuf *m, 762 struct sockaddr *dst, struct rtentry *rt0) 763 { 764 const priv_p priv = (priv_p) ifp->if_softc; 765 struct ng_fec_bundle *b; 766 int error; 767 768 /* Check interface flags */ 769 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) { 770 m_freem(m); 771 return (ENETDOWN); 772 } 773 774 b = &priv->fec_bundle; 775 776 switch (b->fec_btype) { 777 case FEC_BTYPE_MAC: 778 m->m_flags |= M_FEC_MAC; 779 break; 780 #ifdef INET 781 case FEC_BTYPE_INET: 782 /* 783 * We can't use the INET address port selection 784 * scheme if this isn't an INET packet. 785 */ 786 if (dst->sa_family == AF_INET) 787 m->m_flags |= M_FEC_INET; 788 #ifdef INET6 789 else if (dst->sa_family == AF_INET6) 790 m->m_flags |= M_FEC_INET6; 791 #endif 792 else { 793 #ifdef DEBUG 794 printf("%s: can't do inet aggregation of non " 795 "inet packet\n", ifp->if_xname); 796 #endif 797 m->m_flags |= M_FEC_MAC; 798 } 799 break; 800 #endif 801 default: 802 printf("%s: bogus hash type: %d\n", ifp->if_xname, 803 b->fec_btype); 804 m_freem(m); 805 return(EINVAL); 806 break; 807 } 808 809 /* 810 * Pass the frame to ether_output() for all the protocol 811 * handling. This will put the ethernet header on the packet 812 * for us. 813 */ 814 priv->if_error = 0; 815 error = priv->real_if_output(ifp, m, dst, rt0); 816 if (priv->if_error && !error) 817 error = priv->if_error; 818 819 return(error); 820 } 821 822 /* 823 * Apply a hash to the source and destination addresses in the packet 824 * in order to select an interface. Also check link status and handle 825 * dead links accordingly. 826 */ 827 828 static int 829 ng_fec_choose_port(struct ng_fec_bundle *b, 830 struct mbuf *m, struct ifnet **ifp) 831 { 832 struct ether_header *eh; 833 struct mbuf *m0; 834 #ifdef INET 835 struct ip *ip; 836 #ifdef INET6 837 struct ip6_hdr *ip6; 838 #endif 839 #endif 840 841 struct ng_fec_portlist *p; 842 int port = 0, mask; 843 844 /* 845 * If there are only two ports, mask off all but the 846 * last bit for XORing. If there are 4, mask off all 847 * but the last 2 bits. 848 */ 849 mask = b->fec_ifcnt == 2 ? 0x1 : 0x3; 850 eh = mtod(m, struct ether_header *); 851 #ifdef INET 852 ip = (struct ip *)(mtod(m, char *) + 853 sizeof(struct ether_header)); 854 #ifdef INET6 855 ip6 = (struct ip6_hdr *)(mtod(m, char *) + 856 sizeof(struct ether_header)); 857 #endif 858 #endif 859 860 /* 861 * The fg_fec_output() routine is supposed to leave a 862 * flag for us in the mbuf that tells us what hash to 863 * use, but sometimes a new mbuf is prepended to the 864 * chain, so we have to search every mbuf in the chain 865 * to find the flags. 866 */ 867 m0 = m; 868 while (m0) { 869 if (m0->m_flags & (M_FEC_MAC|M_FEC_INET|M_FEC_INET6)) 870 break; 871 m0 = m0->m_next; 872 } 873 if (m0 == NULL) 874 return(EINVAL); 875 876 switch (m0->m_flags & (M_FEC_MAC|M_FEC_INET|M_FEC_INET6)) { 877 case M_FEC_MAC: 878 port = (eh->ether_dhost[5] ^ 879 eh->ether_shost[5]) & mask; 880 break; 881 #ifdef INET 882 case M_FEC_INET: 883 port = (ntohl(ip->ip_dst.s_addr) ^ 884 ntohl(ip->ip_src.s_addr)) & mask; 885 break; 886 #ifdef INET6 887 case M_FEC_INET6: 888 port = (ip6->ip6_dst.s6_addr[15] ^ 889 ip6->ip6_dst.s6_addr[15]) & mask; 890 break; 891 #endif 892 #endif 893 default: 894 return(EINVAL); 895 break; 896 } 897 898 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 899 if (port == p->fec_idx) 900 break; 901 } 902 903 /* 904 * Now that we've chosen a port, make sure it's 905 * alive. If it's not alive, cycle through the bundle 906 * looking for a port that is alive. If we don't find 907 * any, return an error. 908 */ 909 if (p->fec_ifstat != 1) { 910 struct ng_fec_portlist *n = NULL; 911 912 n = TAILQ_NEXT(p, fec_list); 913 if (n == NULL) 914 n = TAILQ_FIRST(&b->ng_fec_ports); 915 while (n != p) { 916 if (n->fec_ifstat == 1) 917 break; 918 n = TAILQ_NEXT(n, fec_list); 919 if (n == NULL) 920 n = TAILQ_FIRST(&b->ng_fec_ports); 921 } 922 if (n == p) 923 return(EAGAIN); 924 p = n; 925 } 926 927 *ifp = p->fec_if; 928 929 return(0); 930 } 931 932 /* 933 * Now that the packet has been run through ether_output(), yank it 934 * off our own send queue and stick it on the queue for the appropriate 935 * underlying physical interface. Note that if the interface's send 936 * queue is full, we save an error status in our private netgraph 937 * space which will eventually be handed up to ng_fec_output(), which 938 * will return it to the rest of the IP stack. We need to do this 939 * in order to duplicate the effect of ether_output() returning ENOBUFS 940 * when it detects that an interface's send queue is full. There's no 941 * other way to signal the error status from here since the if_start() 942 * routine is spec'ed to return void. 943 * 944 * Once the frame is queued, we call ether_output_frame() to initiate 945 * transmission. 946 */ 947 static void 948 ng_fec_start(struct ifnet *ifp) 949 { 950 struct ng_fec_private *priv; 951 struct ng_fec_bundle *b; 952 struct ifnet *oifp = NULL; 953 struct mbuf *m0; 954 int error; 955 956 priv = ifp->if_softc; 957 b = &priv->fec_bundle; 958 959 IF_DEQUEUE(&ifp->if_snd, m0); 960 if (m0 == NULL) 961 return; 962 963 BPF_MTAP(ifp, m0); 964 965 /* Queue up packet on the proper port. */ 966 error = ng_fec_choose_port(b, m0, &oifp); 967 if (error) { 968 ifp->if_ierrors++; 969 m_freem(m0); 970 priv->if_error = ENOBUFS; 971 return; 972 } 973 ifp->if_opackets++; 974 975 priv->if_error = ether_output_frame(oifp, m0); 976 } 977 978 #ifdef DEBUG 979 /* 980 * Display an ioctl to the virtual interface 981 */ 982 983 static void 984 ng_fec_print_ioctl(struct ifnet *ifp, int command, caddr_t data) 985 { 986 char *str; 987 988 switch (command & IOC_DIRMASK) { 989 case IOC_VOID: 990 str = "IO"; 991 break; 992 case IOC_OUT: 993 str = "IOR"; 994 break; 995 case IOC_IN: 996 str = "IOW"; 997 break; 998 case IOC_INOUT: 999 str = "IORW"; 1000 break; 1001 default: 1002 str = "IO??"; 1003 } 1004 log(LOG_DEBUG, "%s: %s('%c', %d, char[%d])\n", 1005 ifp->if_xname, 1006 str, 1007 IOCGROUP(command), 1008 command & 0xff, 1009 IOCPARM_LEN(command)); 1010 } 1011 #endif /* DEBUG */ 1012 1013 /************************************************************************ 1014 NETGRAPH NODE STUFF 1015 ************************************************************************/ 1016 1017 /* 1018 * Constructor for a node 1019 */ 1020 static int 1021 ng_fec_constructor(node_p *nodep) 1022 { 1023 char ifname[NG_FEC_FEC_NAME_MAX + 1]; 1024 struct ifnet *ifp; 1025 node_p node; 1026 priv_p priv; 1027 struct ng_fec_bundle *b; 1028 int error = 0; 1029 1030 /* Allocate node and interface private structures */ 1031 MALLOC(priv, priv_p, sizeof(*priv), M_NETGRAPH, M_NOWAIT); 1032 if (priv == NULL) 1033 return (ENOMEM); 1034 bzero(priv, sizeof(*priv)); 1035 1036 ifp = &priv->arpcom.ac_if; 1037 b = &priv->fec_bundle; 1038 1039 /* Link them together */ 1040 ifp->if_softc = priv; 1041 1042 /* Get an interface unit number */ 1043 if ((error = ng_fec_get_unit(&priv->unit)) != 0) { 1044 FREE(ifp, M_NETGRAPH); 1045 FREE(priv, M_NETGRAPH); 1046 return (error); 1047 } 1048 1049 /* Call generic node constructor */ 1050 if ((error = ng_make_node_common(&typestruct, nodep)) != 0) { 1051 ng_fec_free_unit(priv->unit); 1052 FREE(ifp, M_NETGRAPH); 1053 FREE(priv, M_NETGRAPH); 1054 return (error); 1055 } 1056 node = *nodep; 1057 1058 /* Link together node and private info */ 1059 node->private = priv; 1060 priv->node = node; 1061 priv->arpcom.ac_netgraph = node; 1062 1063 /* Initialize interface structure */ 1064 if_initname(ifp, NG_FEC_FEC_NAME, priv->unit); 1065 ifp->if_start = ng_fec_start; 1066 ifp->if_ioctl = ng_fec_ioctl; 1067 ifp->if_init = ng_fec_init; 1068 ifp->if_watchdog = NULL; 1069 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; 1070 ifp->if_mtu = NG_FEC_MTU_DEFAULT; 1071 ifp->if_flags = (IFF_SIMPLEX|IFF_BROADCAST|IFF_MULTICAST); 1072 ifp->if_type = IFT_PROPVIRTUAL; /* XXX */ 1073 ifp->if_addrlen = 0; /* XXX */ 1074 ifp->if_hdrlen = 0; /* XXX */ 1075 ifp->if_baudrate = 100000000; /* XXX */ 1076 TAILQ_INIT(&ifp->if_addrhead); 1077 1078 /* Give this node the same name as the interface (if possible) */ 1079 bzero(ifname, sizeof(ifname)); 1080 strlcpy(ifname, ifp->if_xname, sizeof(ifname)); 1081 if (ng_name_node(node, ifname) != 0) 1082 log(LOG_WARNING, "%s: can't acquire netgraph name\n", ifname); 1083 1084 /* Grab hold of the ether_input pipe. */ 1085 if (ng_ether_input_p == NULL) 1086 ng_ether_input_p = ng_fec_input; 1087 1088 /* Attach the interface */ 1089 ether_ifattach(ifp, priv->arpcom.ac_enaddr); 1090 priv->real_if_output = ifp->if_output; 1091 ifp->if_output = ng_fec_output; 1092 callout_init(&priv->fec_timeout); 1093 1094 TAILQ_INIT(&b->ng_fec_ports); 1095 b->fec_ifcnt = 0; 1096 1097 ifmedia_init(&priv->ifmedia, 0, 1098 ng_fec_ifmedia_upd, ng_fec_ifmedia_sts); 1099 ifmedia_add(&priv->ifmedia, IFM_ETHER|IFM_NONE, 0, NULL); 1100 ifmedia_set(&priv->ifmedia, IFM_ETHER|IFM_NONE); 1101 1102 /* Done */ 1103 return (0); 1104 } 1105 1106 /* 1107 * Receive a control message 1108 */ 1109 static int 1110 ng_fec_rcvmsg(node_p node, struct ng_mesg *msg, 1111 const char *retaddr, struct ng_mesg **rptr) 1112 { 1113 const priv_p priv = node->private; 1114 struct ng_fec_bundle *b; 1115 struct ng_mesg *resp = NULL; 1116 char *ifname; 1117 int error = 0; 1118 1119 b = &priv->fec_bundle; 1120 1121 switch (msg->header.typecookie) { 1122 case NGM_FEC_COOKIE: 1123 switch (msg->header.cmd) { 1124 case NGM_FEC_ADD_IFACE: 1125 ifname = msg->data; 1126 error = ng_fec_addport(priv, ifname); 1127 break; 1128 case NGM_FEC_DEL_IFACE: 1129 ifname = msg->data; 1130 error = ng_fec_delport(priv, ifname); 1131 break; 1132 case NGM_FEC_SET_MODE_MAC: 1133 b->fec_btype = FEC_BTYPE_MAC; 1134 break; 1135 #ifdef INET 1136 case NGM_FEC_SET_MODE_INET: 1137 b->fec_btype = FEC_BTYPE_INET; 1138 break; 1139 #ifdef INET6 1140 case NGM_FEC_SET_MODE_INET6: 1141 b->fec_btype = FEC_BTYPE_INET6; 1142 break; 1143 #endif 1144 #endif 1145 default: 1146 error = EINVAL; 1147 break; 1148 } 1149 break; 1150 default: 1151 error = EINVAL; 1152 break; 1153 } 1154 if (rptr) 1155 *rptr = resp; 1156 else if (resp) 1157 FREE(resp, M_NETGRAPH); 1158 FREE(msg, M_NETGRAPH); 1159 return (error); 1160 } 1161 1162 /* 1163 * Shutdown and remove the node and its associated interface. 1164 */ 1165 static int 1166 ng_fec_rmnode(node_p node) 1167 { 1168 const priv_p priv = node->private; 1169 struct ng_fec_bundle *b; 1170 struct ng_fec_portlist *p; 1171 char ifname[IFNAMSIZ]; 1172 1173 b = &priv->fec_bundle; 1174 ng_fec_stop(&priv->arpcom.ac_if); 1175 1176 while (!TAILQ_EMPTY(&b->ng_fec_ports)) { 1177 p = TAILQ_FIRST(&b->ng_fec_ports); 1178 sprintf(ifname, "%s", 1179 p->fec_if->if_xname); /* XXX: strings */ 1180 ng_fec_delport(priv, ifname); 1181 } 1182 1183 ng_cutlinks(node); 1184 ng_unname(node); 1185 if (ng_ether_input_p != NULL) 1186 ng_ether_input_p = NULL; 1187 ether_ifdetach(&priv->arpcom.ac_if); 1188 ifmedia_removeall(&priv->ifmedia); 1189 ng_fec_free_unit(priv->unit); 1190 FREE(priv, M_NETGRAPH); 1191 node->private = NULL; 1192 ng_unref(node); 1193 return (0); 1194 } 1195