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sys/netgraph/ng_fec.c
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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 * $FreeBSD$ 36 */ 37 /* 38 * Copyright (c) 1996-1999 Whistle Communications, Inc. 39 * All rights reserved. 40 * 41 * Subject to the following obligations and disclaimer of warranty, use and 42 * redistribution of this software, in source or object code forms, with or 43 * without modifications are expressly permitted by Whistle Communications; 44 * provided, however, that: 45 * 1. Any and all reproductions of the source or object code must include the 46 * copyright notice above and the following disclaimer of warranties; and 47 * 2. No rights are granted, in any manner or form, to use Whistle 48 * Communications, Inc. trademarks, including the mark "WHISTLE 49 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as 50 * such appears in the above copyright notice or in the software. 51 * 52 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND 53 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO 54 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE, 55 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF 56 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. 57 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY 58 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS 59 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE. 60 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES 61 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING 62 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 63 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR 64 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY 65 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 66 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 67 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY 68 * OF SUCH DAMAGE. 69 * 70 * Author: Archie Cobbs <archie@freebsd.org> 71 * 72 * $Whistle: ng_fec.c,v 1.33 1999/11/01 09:24:51 julian Exp $ 73 */ 74 75 /* 76 * This module implements ethernet channel bonding using the Cisco 77 * Fast EtherChannel mechanism. Two or four ports may be combined 78 * into a single aggregate interface. 79 * 80 * Interfaces are named fec0, fec1, etc. New nodes take the 81 * first available interface name. 82 * 83 * This node also includes Berkeley packet filter support. 84 * 85 * Note that this node doesn't need to connect to any other 86 * netgraph nodes in order to do its work. 87 */ 88 89 #include <sys/param.h> 90 #include <sys/systm.h> 91 #include <sys/errno.h> 92 #include <sys/kernel.h> 93 #include <sys/malloc.h> 94 #include <sys/mbuf.h> 95 #include <sys/errno.h> 96 #include <sys/sockio.h> 97 #include <sys/socket.h> 98 #include <sys/syslog.h> 99 #include <sys/libkern.h> 100 #include <sys/queue.h> 101 102 #include <net/if.h> 103 #include <net/if_types.h> 104 #include <net/if_arp.h> 105 #include <net/if_dl.h> 106 #include <net/if_media.h> 107 #include <net/intrq.h> 108 #include <net/bpf.h> 109 #include <net/ethernet.h> 110 111 #include "opt_inet.h" 112 #include "opt_inet6.h" 113 114 #include <netinet/in.h> 115 #ifdef INET 116 #include <netinet/in_systm.h> 117 #include <netinet/ip.h> 118 #endif 119 120 #ifdef INET6 121 #include <netinet/ip6.h> 122 #endif 123 124 #include <netgraph/ng_message.h> 125 #include <netgraph/netgraph.h> 126 #include <netgraph/ng_parse.h> 127 #include <netgraph/ng_fec.h> 128 129 #define IFP2NG(ifp) ((struct ng_node *)((struct arpcom *)(ifp))->ac_netgraph) 130 #define FEC_INC(x, y) (x) = (x + 1) % y 131 132 /* 133 * Current fast etherchannel implementations use either 2 or 4 134 * ports, so for now we limit the maximum bundle size to 4 interfaces. 135 */ 136 #define FEC_BUNDLESIZ 4 137 138 struct ng_fec_portlist { 139 struct ifnet *fec_if; 140 int fec_idx; 141 int fec_ifstat; 142 struct ether_addr fec_mac; 143 TAILQ_ENTRY(ng_fec_portlist) fec_list; 144 }; 145 146 struct ng_fec_bundle { 147 TAILQ_HEAD(,ng_fec_portlist) ng_fec_ports; 148 int fec_ifcnt; 149 int fec_btype; 150 }; 151 152 #define FEC_BTYPE_MAC 0x01 153 #define FEC_BTYPE_INET 0x02 154 #define FEC_BTYPE_INET6 0x03 155 156 /* Node private data */ 157 struct ng_fec_private { 158 struct arpcom arpcom; 159 struct ifmedia ifmedia; 160 int if_flags; 161 int if_error; /* XXX */ 162 int unit; /* Interface unit number */ 163 node_p node; /* Our netgraph node */ 164 struct ng_fec_bundle fec_bundle;/* Aggregate bundle */ 165 struct callout_handle fec_ch; /* callout handle for ticker */ 166 }; 167 typedef struct ng_fec_private *priv_p; 168 169 /* Interface methods */ 170 static void ng_fec_input(struct ifnet *, struct mbuf **, 171 struct ether_header *); 172 static void ng_fec_start(struct ifnet *ifp); 173 static int ng_fec_choose_port(struct ng_fec_bundle *b, 174 struct mbuf *m, struct ifnet **ifp); 175 static int ng_fec_setport(struct ifnet *ifp, u_long cmd, caddr_t data); 176 static void ng_fec_init(void *arg); 177 static void ng_fec_stop(struct ifnet *ifp); 178 static int ng_fec_ifmedia_upd(struct ifnet *ifp); 179 static void ng_fec_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr); 180 static int ng_fec_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data); 181 static int ng_fec_output(struct ifnet *ifp, struct mbuf *m0, 182 struct sockaddr *dst, struct rtentry *rt0); 183 static void ng_fec_tick(void *arg); 184 static int ng_fec_addport(struct ng_fec_private *priv, char *iface); 185 static int ng_fec_delport(struct ng_fec_private *priv, char *iface); 186 187 #ifdef DEBUG 188 static void ng_fec_print_ioctl(struct ifnet *ifp, int cmd, caddr_t data); 189 #endif 190 191 /* Netgraph methods */ 192 static ng_constructor_t ng_fec_constructor; 193 static ng_rcvmsg_t ng_fec_rcvmsg; 194 static ng_shutdown_t ng_fec_rmnode; 195 196 /* List of commands and how to convert arguments to/from ASCII */ 197 static const struct ng_cmdlist ng_fec_cmds[] = { 198 { 199 NGM_FEC_COOKIE, 200 NGM_FEC_ADD_IFACE, 201 "add_iface", 202 &ng_parse_string_type, 203 NULL, 204 }, 205 { 206 NGM_FEC_COOKIE, 207 NGM_FEC_DEL_IFACE, 208 "del_iface", 209 &ng_parse_string_type, 210 NULL, 211 }, 212 { 213 NGM_FEC_COOKIE, 214 NGM_FEC_SET_MODE_MAC, 215 "set_mode_mac", 216 NULL, 217 NULL, 218 }, 219 { 220 NGM_FEC_COOKIE, 221 NGM_FEC_SET_MODE_INET, 222 "set_mode_inet", 223 NULL, 224 NULL, 225 }, 226 { 0 } 227 }; 228 229 /* Node type descriptor */ 230 static struct ng_type typestruct = { 231 NG_VERSION, 232 NG_FEC_NODE_TYPE, 233 NULL, 234 ng_fec_constructor, 235 ng_fec_rcvmsg, 236 ng_fec_rmnode, 237 NULL, 238 NULL, 239 NULL, 240 NULL, 241 NULL, 242 NULL, 243 ng_fec_cmds 244 }; 245 NETGRAPH_INIT(fec, &typestruct); 246 247 /* We keep a bitmap indicating which unit numbers are free. 248 One means the unit number is free, zero means it's taken. */ 249 static int *ng_fec_units = NULL; 250 static int ng_fec_units_len = 0; 251 static int ng_units_in_use = 0; 252 253 #define UNITS_BITSPERWORD (sizeof(*ng_fec_units) * NBBY) 254 255 /* 256 * Find the first free unit number for a new interface. 257 * Increase the size of the unit bitmap as necessary. 258 */ 259 static __inline__ int 260 ng_fec_get_unit(int *unit) 261 { 262 int index, bit; 263 264 for (index = 0; index < ng_fec_units_len 265 && ng_fec_units[index] == 0; index++); 266 if (index == ng_fec_units_len) { /* extend array */ 267 int i, *newarray, newlen; 268 269 newlen = (2 * ng_fec_units_len) + 4; 270 MALLOC(newarray, int *, newlen * sizeof(*ng_fec_units), 271 M_NETGRAPH, M_NOWAIT); 272 if (newarray == NULL) 273 return (ENOMEM); 274 bcopy(ng_fec_units, newarray, 275 ng_fec_units_len * sizeof(*ng_fec_units)); 276 for (i = ng_fec_units_len; i < newlen; i++) 277 newarray[i] = ~0; 278 if (ng_fec_units != NULL) 279 FREE(ng_fec_units, M_NETGRAPH); 280 ng_fec_units = newarray; 281 ng_fec_units_len = newlen; 282 } 283 bit = ffs(ng_fec_units[index]) - 1; 284 KASSERT(bit >= 0 && bit <= UNITS_BITSPERWORD - 1, 285 ("%s: word=%d bit=%d", __FUNCTION__, ng_fec_units[index], bit)); 286 ng_fec_units[index] &= ~(1 << bit); 287 *unit = (index * UNITS_BITSPERWORD) + bit; 288 ng_units_in_use++; 289 return (0); 290 } 291 292 /* 293 * Free a no longer needed unit number. 294 */ 295 static __inline__ void 296 ng_fec_free_unit(int unit) 297 { 298 int index, bit; 299 300 index = unit / UNITS_BITSPERWORD; 301 bit = unit % UNITS_BITSPERWORD; 302 KASSERT(index < ng_fec_units_len, 303 ("%s: unit=%d len=%d", __FUNCTION__, unit, ng_fec_units_len)); 304 KASSERT((ng_fec_units[index] & (1 << bit)) == 0, 305 ("%s: unit=%d is free", __FUNCTION__, unit)); 306 ng_fec_units[index] |= (1 << bit); 307 /* 308 * XXX We could think about reducing the size of ng_fec_units[] 309 * XXX here if the last portion is all ones 310 * XXX At least free it if no more units. 311 * Needed if we are eventually be able to unload. 312 */ 313 ng_units_in_use++; 314 if (ng_units_in_use == 0) { /* XXX make SMP safe */ 315 FREE(ng_fec_units, M_NETGRAPH); 316 ng_fec_units_len = 0; 317 ng_fec_units = NULL; 318 } 319 } 320 321 /************************************************************************ 322 INTERFACE STUFF 323 ************************************************************************/ 324 325 static int 326 ng_fec_addport(struct ng_fec_private *priv, char *iface) 327 { 328 struct ng_fec_bundle *b; 329 struct ifnet *ifp, *bifp; 330 struct arpcom *ac; 331 struct ifaddr *ifa; 332 struct sockaddr_dl *sdl; 333 struct ng_fec_portlist *p, *new; 334 335 if (priv == NULL || iface == NULL) 336 return(EINVAL); 337 338 b = &priv->fec_bundle; 339 ifp = &priv->arpcom.ac_if; 340 341 /* Find the interface */ 342 bifp = ifunit(iface); 343 if (bifp == NULL) { 344 printf("fec%d: tried to add iface %s, which " 345 "doesn't seem to exist\n", priv->unit, iface); 346 return(ENOENT); 347 } 348 349 /* See if we have room in the bundle */ 350 if (b->fec_ifcnt == FEC_BUNDLESIZ) { 351 printf("fec%d: can't add new iface; bundle is full\n", 352 priv->unit); 353 return(ENOSPC); 354 } 355 356 /* See if the interface is already in the bundle */ 357 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 358 if (p->fec_if == bifp) { 359 printf("fec%d: iface %s is already in this " 360 "bundle\n", priv->unit, iface); 361 return(EINVAL); 362 } 363 } 364 365 /* Allocate new list entry. */ 366 MALLOC(new, struct ng_fec_portlist *, 367 sizeof(struct ng_fec_portlist), M_NETGRAPH, M_NOWAIT); 368 if (new == NULL) 369 return(ENOMEM); 370 371 ac = (struct arpcom *)bifp; 372 ac->ac_netgraph = priv->node; 373 374 /* 375 * If this is the first interface added to the bundle, 376 * use its MAC address for the virtual interface (and, 377 * by extension, all the other ports in the bundle). 378 */ 379 if (b->fec_ifcnt == 0) { 380 ifa = ifnet_addrs[ifp->if_index - 1]; 381 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 382 bcopy((char *)ac->ac_enaddr, 383 priv->arpcom.ac_enaddr, ETHER_ADDR_LEN); 384 bcopy((char *)ac->ac_enaddr, 385 LLADDR(sdl), ETHER_ADDR_LEN); 386 } 387 388 b->fec_btype = FEC_BTYPE_MAC; 389 new->fec_idx = b->fec_ifcnt; 390 b->fec_ifcnt++; 391 392 /* Save the real MAC address. */ 393 bcopy((char *)ac->ac_enaddr, 394 (char *)&new->fec_mac, ETHER_ADDR_LEN); 395 396 /* Set up phony MAC address. */ 397 ifa = ifnet_addrs[bifp->if_index - 1]; 398 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 399 bcopy(priv->arpcom.ac_enaddr, ac->ac_enaddr, ETHER_ADDR_LEN); 400 bcopy(priv->arpcom.ac_enaddr, LLADDR(sdl), ETHER_ADDR_LEN); 401 402 /* Add to the queue */ 403 new->fec_if = bifp; 404 TAILQ_INSERT_TAIL(&b->ng_fec_ports, new, fec_list); 405 406 return(0); 407 } 408 409 static int 410 ng_fec_delport(struct ng_fec_private *priv, char *iface) 411 { 412 struct ng_fec_bundle *b; 413 struct ifnet *ifp, *bifp; 414 struct arpcom *ac; 415 struct ifaddr *ifa; 416 struct sockaddr_dl *sdl; 417 struct ng_fec_portlist *p; 418 419 if (priv == NULL || iface == NULL) 420 return(EINVAL); 421 422 b = &priv->fec_bundle; 423 ifp = &priv->arpcom.ac_if; 424 425 /* Find the interface */ 426 bifp = ifunit(iface); 427 if (bifp == NULL) { 428 printf("fec%d: tried to remove iface %s, which " 429 "doesn't seem to exist\n", priv->unit, iface); 430 return(ENOENT); 431 } 432 433 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 434 if (p->fec_if == bifp) 435 break; 436 } 437 438 if (p == NULL) { 439 printf("fec%d: tried to remove iface %s which " 440 "is not in our bundle\n", priv->unit, iface); 441 return(EINVAL); 442 } 443 444 /* Stop interface */ 445 bifp->if_flags &= ~IFF_UP; 446 (*bifp->if_ioctl)(bifp, SIOCSIFFLAGS, NULL); 447 448 /* Restore MAC address. */ 449 ac = (struct arpcom *)bifp; 450 ifa = ifnet_addrs[bifp->if_index - 1]; 451 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 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); 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); 513 /* mark iface as up and let the monitor check it */ 514 p->fec_ifstat = -1; 515 } 516 517 priv->fec_ch = timeout(ng_fec_tick, priv, hz); 518 519 return; 520 } 521 522 static void 523 ng_fec_stop(struct ifnet *ifp) 524 { 525 struct ng_fec_private *priv; 526 struct ng_fec_bundle *b; 527 struct ifnet *bifp; 528 struct ng_fec_portlist *p; 529 530 priv = ifp->if_softc; 531 b = &priv->fec_bundle; 532 533 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 534 bifp = p->fec_if; 535 bifp->if_flags &= ~IFF_UP; 536 (*bifp->if_ioctl)(bifp, SIOCSIFFLAGS, NULL); 537 } 538 539 untimeout(ng_fec_tick, priv, priv->fec_ch); 540 541 return; 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 if (error) { 562 printf("fec%d: failed to check status " 563 "of link %s%d\n", priv->unit, ifp->if_name, 564 ifp->if_unit); 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%d in bundle " 575 "is up\n", priv->unit, 576 ifp->if_name, ifp->if_unit); 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%d in bundle " 583 "is down\n", priv->unit, 584 ifp->if_name, ifp->if_unit); 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("fec%d: can't do inet aggregation of non " 813 "inet packet\n", ifp->if_unit); 814 #endif 815 m->m_flags |= M_FEC_MAC; 816 } 817 break; 818 #endif 819 default: 820 printf("fec%d: bogus hash type: %d\n", ifp->if_unit, 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%d: %s('%c', %d, char[%d])\n", 1025 ifp->if_name, ifp->if_unit, 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 ifp->if_name = NG_FEC_FEC_NAME; 1085 ifp->if_unit = priv->unit; 1086 ifp->if_output = ng_fec_output; 1087 ifp->if_start = ng_fec_start; 1088 ifp->if_ioctl = ng_fec_ioctl; 1089 ifp->if_init = ng_fec_init; 1090 ifp->if_watchdog = NULL; 1091 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; 1092 ifp->if_mtu = NG_FEC_MTU_DEFAULT; 1093 ifp->if_flags = (IFF_SIMPLEX|IFF_BROADCAST|IFF_MULTICAST); 1094 ifp->if_type = IFT_PROPVIRTUAL; /* XXX */ 1095 ifp->if_addrlen = 0; /* XXX */ 1096 ifp->if_hdrlen = 0; /* XXX */ 1097 ifp->if_baudrate = 100000000; /* XXX */ 1098 TAILQ_INIT(&ifp->if_addrhead); 1099 1100 /* Give this node the same name as the interface (if possible) */ 1101 bzero(ifname, sizeof(ifname)); 1102 snprintf(ifname, sizeof(ifname), "%s%d", ifp->if_name, ifp->if_unit); 1103 if (ng_name_node(node, ifname) != 0) 1104 log(LOG_WARNING, "%s: can't acquire netgraph name\n", ifname); 1105 1106 /* Grab hold of the ether_input pipe. */ 1107 if (ng_ether_input_p == NULL) 1108 ng_ether_input_p = ng_fec_input; 1109 1110 /* Attach the interface */ 1111 ether_ifattach(ifp, ETHER_BPF_SUPPORTED); 1112 callout_handle_init(&priv->fec_ch); 1113 1114 TAILQ_INIT(&b->ng_fec_ports); 1115 b->fec_ifcnt = 0; 1116 1117 ifmedia_init(&priv->ifmedia, 0, 1118 ng_fec_ifmedia_upd, ng_fec_ifmedia_sts); 1119 ifmedia_add(&priv->ifmedia, IFM_ETHER|IFM_NONE, 0, NULL); 1120 ifmedia_set(&priv->ifmedia, IFM_ETHER|IFM_NONE); 1121 1122 /* Done */ 1123 return (0); 1124 } 1125 1126 /* 1127 * Receive a control message 1128 */ 1129 static int 1130 ng_fec_rcvmsg(node_p node, struct ng_mesg *msg, 1131 const char *retaddr, struct ng_mesg **rptr) 1132 { 1133 const priv_p priv = node->private; 1134 struct ng_fec_bundle *b; 1135 struct ng_mesg *resp = NULL; 1136 char *ifname; 1137 int error = 0; 1138 1139 b = &priv->fec_bundle; 1140 1141 switch (msg->header.typecookie) { 1142 case NGM_FEC_COOKIE: 1143 switch (msg->header.cmd) { 1144 case NGM_FEC_ADD_IFACE: 1145 ifname = msg->data; 1146 error = ng_fec_addport(priv, ifname); 1147 break; 1148 case NGM_FEC_DEL_IFACE: 1149 ifname = msg->data; 1150 error = ng_fec_delport(priv, ifname); 1151 break; 1152 case NGM_FEC_SET_MODE_MAC: 1153 b->fec_btype = FEC_BTYPE_MAC; 1154 break; 1155 #ifdef INET 1156 case NGM_FEC_SET_MODE_INET: 1157 b->fec_btype = FEC_BTYPE_INET; 1158 break; 1159 #ifdef INET6 1160 case NGM_FEC_SET_MODE_INET6: 1161 b->fec_btype = FEC_BTYPE_INET6; 1162 break; 1163 #endif 1164 #endif 1165 default: 1166 error = EINVAL; 1167 break; 1168 } 1169 break; 1170 default: 1171 error = EINVAL; 1172 break; 1173 } 1174 if (rptr) 1175 *rptr = resp; 1176 else if (resp) 1177 FREE(resp, M_NETGRAPH); 1178 FREE(msg, M_NETGRAPH); 1179 return (error); 1180 } 1181 1182 /* 1183 * Shutdown and remove the node and its associated interface. 1184 */ 1185 static int 1186 ng_fec_rmnode(node_p node) 1187 { 1188 const priv_p priv = node->private; 1189 struct ng_fec_bundle *b; 1190 struct ng_fec_portlist *p; 1191 char ifname[IFNAMSIZ]; 1192 1193 b = &priv->fec_bundle; 1194 ng_fec_stop(&priv->arpcom.ac_if); 1195 1196 while (!TAILQ_EMPTY(&b->ng_fec_ports)) { 1197 p = TAILQ_FIRST(&b->ng_fec_ports); 1198 sprintf(ifname, "%s%d", 1199 p->fec_if->if_name, 1200 p->fec_if->if_unit); 1201 ng_fec_delport(priv, ifname); 1202 } 1203 1204 ng_cutlinks(node); 1205 ng_unname(node); 1206 if (ng_ether_input_p != NULL) 1207 ng_ether_input_p = NULL; 1208 ether_ifdetach(&priv->arpcom.ac_if, ETHER_BPF_SUPPORTED); 1209 ifmedia_removeall(&priv->ifmedia); 1210 ng_fec_free_unit(priv->unit); 1211 FREE(priv, M_NETGRAPH); 1212 node->private = NULL; 1213 ng_unref(node); 1214 return (0); 1215 }
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