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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: releng/5.3/sys/netgraph/ng_fec.c 136588 2004-10-16 08:43:07Z cvs2svn $ 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/bpf.h> 108 #include <net/ethernet.h> 109 110 #include "opt_inet.h" 111 #include "opt_inet6.h" 112 113 #include <netinet/in.h> 114 #ifdef INET 115 #include <netinet/in_systm.h> 116 #include <netinet/ip.h> 117 #endif 118 119 #ifdef INET6 120 #include <netinet/ip6.h> 121 #endif 122 123 #include <netgraph/ng_message.h> 124 #include <netgraph/netgraph.h> 125 #include <netgraph/ng_parse.h> 126 #include <netgraph/ng_fec.h> 127 128 /* 129 * We need a way to stash a pointer to our netgraph node in the 130 * ifnet structure so that receive handling works. As far as I can 131 * tell, although there is an AF_NETGRAPH address family, it's only 132 * used to identify sockaddr_ng structures: there is no netgraph address 133 * family domain. This means the AF_NETGRAPH entry in ifp->if_afdata 134 * should be unused, so we can use to hold our node context. 135 */ 136 #define IFP2NG(ifp) (struct ng_node *)(ifp->if_afdata[AF_NETGRAPH]) 137 #define IFP2NG_SET(ifp, val) ifp->if_afdata[AF_NETGRAPH] = (val); 138 #define FEC_INC(x, y) (x) = (x + 1) % y 139 140 /* 141 * Current fast etherchannel implementations use either 2 or 4 142 * ports, so for now we limit the maximum bundle size to 4 interfaces. 143 */ 144 #define FEC_BUNDLESIZ 4 145 146 struct ng_fec_portlist { 147 struct ifnet *fec_if; 148 void (*fec_if_input) (struct ifnet *, 149 struct mbuf *); 150 int fec_idx; 151 int fec_ifstat; 152 struct ether_addr fec_mac; 153 TAILQ_ENTRY(ng_fec_portlist) fec_list; 154 }; 155 156 struct ng_fec_bundle { 157 TAILQ_HEAD(,ng_fec_portlist) ng_fec_ports; 158 int fec_ifcnt; 159 int fec_btype; 160 int (*fec_if_output) (struct ifnet *, 161 struct mbuf *, 162 struct sockaddr *, 163 struct rtentry *); 164 }; 165 166 #define FEC_BTYPE_MAC 0x01 167 #define FEC_BTYPE_INET 0x02 168 #define FEC_BTYPE_INET6 0x03 169 170 /* Node private data */ 171 struct ng_fec_private { 172 struct arpcom arpcom; 173 struct ifmedia ifmedia; 174 int if_flags; 175 int if_error; /* XXX */ 176 int unit; /* Interface unit number */ 177 node_p node; /* Our netgraph node */ 178 struct ng_fec_bundle fec_bundle;/* Aggregate bundle */ 179 struct callout_handle fec_ch; /* callout handle for ticker */ 180 }; 181 typedef struct ng_fec_private *priv_p; 182 183 /* Interface methods */ 184 static void ng_fec_input(struct ifnet *, struct mbuf *); 185 static void ng_fec_start(struct ifnet *ifp); 186 static int ng_fec_choose_port(struct ng_fec_bundle *b, 187 struct mbuf *m, struct ifnet **ifp); 188 static int ng_fec_setport(struct ifnet *ifp, u_long cmd, caddr_t data); 189 static void ng_fec_init(void *arg); 190 static void ng_fec_stop(struct ifnet *ifp); 191 static int ng_fec_ifmedia_upd(struct ifnet *ifp); 192 static void ng_fec_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr); 193 static int ng_fec_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data); 194 static int ng_fec_output(struct ifnet *ifp, struct mbuf *m0, 195 struct sockaddr *dst, struct rtentry *rt0); 196 static void ng_fec_tick(void *arg); 197 static int ng_fec_addport(struct ng_fec_private *priv, char *iface); 198 static int ng_fec_delport(struct ng_fec_private *priv, char *iface); 199 200 #ifdef DEBUG 201 static void ng_fec_print_ioctl(struct ifnet *ifp, int cmd, caddr_t data); 202 #endif 203 204 /* Netgraph methods */ 205 static ng_constructor_t ng_fec_constructor; 206 static ng_rcvmsg_t ng_fec_rcvmsg; 207 static ng_shutdown_t ng_fec_shutdown; 208 209 /* List of commands and how to convert arguments to/from ASCII */ 210 static const struct ng_cmdlist ng_fec_cmds[] = { 211 { 212 NGM_FEC_COOKIE, 213 NGM_FEC_ADD_IFACE, 214 "add_iface", 215 &ng_parse_string_type, 216 NULL, 217 }, 218 { 219 NGM_FEC_COOKIE, 220 NGM_FEC_DEL_IFACE, 221 "del_iface", 222 &ng_parse_string_type, 223 NULL, 224 }, 225 { 226 NGM_FEC_COOKIE, 227 NGM_FEC_SET_MODE_MAC, 228 "set_mode_mac", 229 NULL, 230 NULL, 231 }, 232 { 233 NGM_FEC_COOKIE, 234 NGM_FEC_SET_MODE_INET, 235 "set_mode_inet", 236 NULL, 237 NULL, 238 }, 239 { 0 } 240 }; 241 242 /* Node type descriptor */ 243 static struct ng_type typestruct = { 244 .version = NG_ABI_VERSION, 245 .name = NG_FEC_NODE_TYPE, 246 .constructor = ng_fec_constructor, 247 .rcvmsg = ng_fec_rcvmsg, 248 .shutdown = ng_fec_shutdown, 249 .cmdlist = ng_fec_cmds, 250 }; 251 NETGRAPH_INIT(fec, &typestruct); 252 253 /* We keep a bitmap indicating which unit numbers are free. 254 One means the unit number is free, zero means it's taken. */ 255 static int *ng_fec_units = NULL; 256 static int ng_fec_units_len = 0; 257 static int ng_units_in_use = 0; 258 259 #define UNITS_BITSPERWORD (sizeof(*ng_fec_units) * NBBY) 260 261 static struct mtx ng_fec_mtx; 262 MTX_SYSINIT(ng_fec, &ng_fec_mtx, "ng_fec", MTX_DEF); 263 264 /* 265 * Find the first free unit number for a new interface. 266 * Increase the size of the unit bitmap as necessary. 267 */ 268 static __inline int 269 ng_fec_get_unit(int *unit) 270 { 271 int index, bit; 272 273 mtx_lock(&ng_fec_mtx); 274 for (index = 0; index < ng_fec_units_len 275 && ng_fec_units[index] == 0; index++); 276 if (index == ng_fec_units_len) { /* extend array */ 277 int i, *newarray, newlen; 278 279 newlen = (2 * ng_fec_units_len) + 4; 280 MALLOC(newarray, int *, newlen * sizeof(*ng_fec_units), 281 M_NETGRAPH, M_NOWAIT); 282 if (newarray == NULL) { 283 mtx_unlock(&ng_fec_mtx); 284 return (ENOMEM); 285 } 286 bcopy(ng_fec_units, newarray, 287 ng_fec_units_len * sizeof(*ng_fec_units)); 288 for (i = ng_fec_units_len; i < newlen; i++) 289 newarray[i] = ~0; 290 if (ng_fec_units != NULL) 291 FREE(ng_fec_units, M_NETGRAPH); 292 ng_fec_units = newarray; 293 ng_fec_units_len = newlen; 294 } 295 bit = ffs(ng_fec_units[index]) - 1; 296 KASSERT(bit >= 0 && bit <= UNITS_BITSPERWORD - 1, 297 ("%s: word=%d bit=%d", __FUNCTION__, ng_fec_units[index], bit)); 298 ng_fec_units[index] &= ~(1 << bit); 299 *unit = (index * UNITS_BITSPERWORD) + bit; 300 ng_units_in_use++; 301 mtx_unlock(&ng_fec_mtx); 302 return (0); 303 } 304 305 /* 306 * Free a no longer needed unit number. 307 */ 308 static __inline void 309 ng_fec_free_unit(int unit) 310 { 311 int index, bit; 312 313 index = unit / UNITS_BITSPERWORD; 314 bit = unit % UNITS_BITSPERWORD; 315 mtx_lock(&ng_fec_mtx); 316 KASSERT(index < ng_fec_units_len, 317 ("%s: unit=%d len=%d", __FUNCTION__, unit, ng_fec_units_len)); 318 KASSERT((ng_fec_units[index] & (1 << bit)) == 0, 319 ("%s: unit=%d is free", __FUNCTION__, unit)); 320 ng_fec_units[index] |= (1 << bit); 321 /* 322 * XXX We could think about reducing the size of ng_fec_units[] 323 * XXX here if the last portion is all ones 324 * XXX At least free it if no more units 325 * Needed if we are to eventually be able to unload. 326 */ 327 ng_units_in_use--; 328 if (ng_units_in_use == 0) { /* XXX make SMP safe */ 329 FREE(ng_fec_units, M_NETGRAPH); 330 ng_fec_units_len = 0; 331 ng_fec_units = NULL; 332 } 333 mtx_unlock(&ng_fec_mtx); 334 } 335 336 /************************************************************************ 337 INTERFACE STUFF 338 ************************************************************************/ 339 340 static int 341 ng_fec_addport(struct ng_fec_private *priv, char *iface) 342 { 343 struct ng_fec_bundle *b; 344 struct ifnet *ifp, *bifp; 345 struct arpcom *ac; 346 struct ifaddr *ifa; 347 struct sockaddr_dl *sdl; 348 struct ng_fec_portlist *p, *new; 349 350 if (priv == NULL || iface == NULL) 351 return(EINVAL); 352 353 b = &priv->fec_bundle; 354 ifp = &priv->arpcom.ac_if; 355 356 /* Find the interface */ 357 bifp = ifunit(iface); 358 if (bifp == NULL) { 359 printf("fec%d: tried to add iface %s, which " 360 "doesn't seem to exist\n", priv->unit, iface); 361 return(ENOENT); 362 } 363 364 /* See if we have room in the bundle */ 365 if (b->fec_ifcnt == FEC_BUNDLESIZ) { 366 printf("fec%d: can't add new iface; bundle is full\n", 367 priv->unit); 368 return(ENOSPC); 369 } 370 371 /* See if the interface is already in the bundle */ 372 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 373 if (p->fec_if == bifp) { 374 printf("fec%d: iface %s is already in this " 375 "bundle\n", priv->unit, iface); 376 return(EINVAL); 377 } 378 } 379 380 /* 381 * All interfaces must use the same output vector. Once the 382 * user attaches an interface of one type, make all subsequent 383 * interfaces have the same output vector. 384 */ 385 if (b->fec_if_output != NULL) { 386 if (b->fec_if_output != bifp->if_output) { 387 printf("fec%d: iface %s is not the same type " 388 "as the other interface(s) already in " 389 "the bundle\n", priv->unit, iface); 390 return(EINVAL); 391 } 392 } 393 394 /* Allocate new list entry. */ 395 MALLOC(new, struct ng_fec_portlist *, 396 sizeof(struct ng_fec_portlist), M_NETGRAPH, M_NOWAIT); 397 if (new == NULL) 398 return(ENOMEM); 399 400 ac = (struct arpcom *)bifp; 401 402 IF_AFDATA_LOCK(bifp); 403 bifp->if_afdata[AF_NETGRAPH] = priv->node; 404 IF_AFDATA_UNLOCK(bifp); 405 406 /* 407 * If this is the first interface added to the bundle, 408 * use its MAC address for the virtual interface (and, 409 * by extension, all the other ports in the bundle). 410 */ 411 if (b->fec_ifcnt == 0) { 412 ifa = ifaddr_byindex(ifp->if_index); 413 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 414 bcopy((char *)ac->ac_enaddr, 415 priv->arpcom.ac_enaddr, ETHER_ADDR_LEN); 416 bcopy((char *)ac->ac_enaddr, 417 LLADDR(sdl), ETHER_ADDR_LEN); 418 } 419 420 b->fec_btype = FEC_BTYPE_MAC; 421 new->fec_idx = b->fec_ifcnt; 422 b->fec_ifcnt++; 423 424 /* Save the real MAC address. */ 425 bcopy((char *)ac->ac_enaddr, 426 (char *)&new->fec_mac, ETHER_ADDR_LEN); 427 428 /* Set up phony MAC address. */ 429 ifa = ifaddr_byindex(bifp->if_index); 430 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 431 bcopy(priv->arpcom.ac_enaddr, ac->ac_enaddr, ETHER_ADDR_LEN); 432 bcopy(priv->arpcom.ac_enaddr, LLADDR(sdl), ETHER_ADDR_LEN); 433 434 /* Save original input vector */ 435 new->fec_if_input = bifp->if_input; 436 437 /* Override it with our own */ 438 bifp->if_input = ng_fec_input; 439 440 /* Save output vector too. */ 441 if (b->fec_if_output == NULL) 442 b->fec_if_output = bifp->if_output; 443 444 /* Add to the queue */ 445 new->fec_if = bifp; 446 TAILQ_INSERT_TAIL(&b->ng_fec_ports, new, fec_list); 447 448 return(0); 449 } 450 451 static int 452 ng_fec_delport(struct ng_fec_private *priv, char *iface) 453 { 454 struct ng_fec_bundle *b; 455 struct ifnet *ifp, *bifp; 456 struct arpcom *ac; 457 struct ifaddr *ifa; 458 struct sockaddr_dl *sdl; 459 struct ng_fec_portlist *p; 460 461 if (priv == NULL || iface == NULL) 462 return(EINVAL); 463 464 b = &priv->fec_bundle; 465 ifp = &priv->arpcom.ac_if; 466 467 /* Find the interface */ 468 bifp = ifunit(iface); 469 if (bifp == NULL) { 470 printf("fec%d: tried to remove iface %s, which " 471 "doesn't seem to exist\n", priv->unit, iface); 472 return(ENOENT); 473 } 474 475 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 476 if (p->fec_if == bifp) 477 break; 478 } 479 480 if (p == NULL) { 481 printf("fec%d: tried to remove iface %s which " 482 "is not in our bundle\n", priv->unit, iface); 483 return(EINVAL); 484 } 485 486 /* Stop interface */ 487 bifp->if_flags &= ~IFF_UP; 488 (*bifp->if_ioctl)(bifp, SIOCSIFFLAGS, NULL); 489 490 /* Restore MAC address. */ 491 ac = (struct arpcom *)bifp; 492 ifa = ifaddr_byindex(bifp->if_index); 493 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 494 bcopy((char *)&p->fec_mac, ac->ac_enaddr, ETHER_ADDR_LEN); 495 bcopy((char *)&p->fec_mac, LLADDR(sdl), ETHER_ADDR_LEN); 496 497 /* Restore input vector */ 498 bifp->if_input = p->fec_if_input; 499 500 /* Remove our node context pointer. */ 501 IF_AFDATA_LOCK(bifp); 502 bifp->if_afdata[AF_NETGRAPH] = NULL; 503 IF_AFDATA_UNLOCK(bifp); 504 505 /* Delete port */ 506 TAILQ_REMOVE(&b->ng_fec_ports, p, fec_list); 507 FREE(p, M_NETGRAPH); 508 b->fec_ifcnt--; 509 510 if (b->fec_ifcnt == 0) 511 b->fec_if_output = NULL; 512 513 return(0); 514 } 515 516 /* 517 * Pass an ioctl command down to all the underyling interfaces in a 518 * bundle. Used for setting multicast filters and flags. 519 */ 520 521 static int 522 ng_fec_setport(struct ifnet *ifp, u_long command, caddr_t data) 523 { 524 struct ng_fec_private *priv; 525 struct ng_fec_bundle *b; 526 struct ifnet *oifp; 527 struct ng_fec_portlist *p; 528 529 priv = ifp->if_softc; 530 b = &priv->fec_bundle; 531 532 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 533 oifp = p->fec_if; 534 if (oifp != NULL) 535 (*oifp->if_ioctl)(oifp, command, data); 536 } 537 538 return(0); 539 } 540 541 static void 542 ng_fec_init(void *arg) 543 { 544 struct ng_fec_private *priv; 545 struct ng_fec_bundle *b; 546 struct ifnet *ifp, *bifp; 547 struct ng_fec_portlist *p; 548 549 ifp = arg; 550 priv = ifp->if_softc; 551 b = &priv->fec_bundle; 552 553 if (b->fec_ifcnt == 1 || b->fec_ifcnt == 3) { 554 printf("fec%d: invalid bundle " 555 "size: %d\n", priv->unit, 556 b->fec_ifcnt); 557 return; 558 } 559 560 ng_fec_stop(ifp); 561 562 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 563 bifp = p->fec_if; 564 bifp->if_flags |= IFF_UP; 565 (*bifp->if_ioctl)(bifp, SIOCSIFFLAGS, NULL); 566 /* mark iface as up and let the monitor check it */ 567 p->fec_ifstat = -1; 568 } 569 570 priv->fec_ch = timeout(ng_fec_tick, priv, hz); 571 572 return; 573 } 574 575 static void 576 ng_fec_stop(struct ifnet *ifp) 577 { 578 struct ng_fec_private *priv; 579 struct ng_fec_bundle *b; 580 struct ifnet *bifp; 581 struct ng_fec_portlist *p; 582 583 priv = ifp->if_softc; 584 b = &priv->fec_bundle; 585 586 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 587 bifp = p->fec_if; 588 bifp->if_flags &= ~IFF_UP; 589 (*bifp->if_ioctl)(bifp, SIOCSIFFLAGS, NULL); 590 } 591 592 untimeout(ng_fec_tick, priv, priv->fec_ch); 593 594 return; 595 } 596 597 static void 598 ng_fec_tick(void *arg) 599 { 600 struct ng_fec_private *priv; 601 struct ng_fec_bundle *b; 602 struct ifmediareq ifmr; 603 struct ifnet *ifp; 604 struct ng_fec_portlist *p; 605 int error = 0; 606 607 priv = arg; 608 b = &priv->fec_bundle; 609 610 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 611 bzero((char *)&ifmr, sizeof(ifmr)); 612 ifp = p->fec_if; 613 error = (*ifp->if_ioctl)(ifp, SIOCGIFMEDIA, (caddr_t)&ifmr); 614 if (error) { 615 printf("fec%d: failed to check status " 616 "of link %s\n", priv->unit, ifp->if_xname); 617 continue; 618 } 619 620 if (ifmr.ifm_status & IFM_AVALID) { 621 if (ifmr.ifm_status & IFM_ACTIVE) { 622 if (p->fec_ifstat == -1 || 623 p->fec_ifstat == 0) { 624 p->fec_ifstat = 1; 625 printf("fec%d: port %s in bundle " 626 "is up\n", priv->unit, 627 ifp->if_xname); 628 } 629 } else { 630 if (p->fec_ifstat == -1 || 631 p->fec_ifstat == 1) { 632 p->fec_ifstat = 0; 633 printf("fec%d: port %s in bundle " 634 "is down\n", priv->unit, 635 ifp->if_xname); 636 } 637 } 638 } 639 } 640 641 ifp = &priv->arpcom.ac_if; 642 if (ifp->if_flags & IFF_RUNNING) 643 priv->fec_ch = timeout(ng_fec_tick, priv, hz); 644 645 return; 646 } 647 648 static int 649 ng_fec_ifmedia_upd(struct ifnet *ifp) 650 { 651 return(0); 652 } 653 654 static void ng_fec_ifmedia_sts(struct ifnet *ifp, 655 struct ifmediareq *ifmr) 656 { 657 struct ng_fec_private *priv; 658 struct ng_fec_bundle *b; 659 struct ng_fec_portlist *p; 660 661 priv = ifp->if_softc; 662 b = &priv->fec_bundle; 663 664 ifmr->ifm_status = IFM_AVALID; 665 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 666 if (p->fec_ifstat) { 667 ifmr->ifm_status |= IFM_ACTIVE; 668 break; 669 } 670 } 671 672 return; 673 } 674 675 /* 676 * Process an ioctl for the virtual interface 677 */ 678 static int 679 ng_fec_ioctl(struct ifnet *ifp, u_long command, caddr_t data) 680 { 681 struct ifreq *const ifr = (struct ifreq *) data; 682 int s, error = 0; 683 struct ng_fec_private *priv; 684 struct ng_fec_bundle *b; 685 686 priv = ifp->if_softc; 687 b = &priv->fec_bundle; 688 689 #ifdef DEBUG 690 ng_fec_print_ioctl(ifp, command, data); 691 #endif 692 s = splimp(); 693 switch (command) { 694 695 /* These two are mostly handled at a higher layer */ 696 case SIOCSIFADDR: 697 case SIOCGIFADDR: 698 case SIOCSIFMTU: 699 error = ether_ioctl(ifp, command, data); 700 break; 701 702 /* Set flags */ 703 case SIOCSIFFLAGS: 704 /* 705 * If the interface is marked up and stopped, then start it. 706 * If it is marked down and running, then stop it. 707 */ 708 if (ifr->ifr_flags & IFF_UP) { 709 if (!(ifp->if_flags & IFF_RUNNING)) { 710 /* Sanity. */ 711 if (b->fec_ifcnt == 1 || b->fec_ifcnt == 3) { 712 printf("fec%d: invalid bundle " 713 "size: %d\n", priv->unit, 714 b->fec_ifcnt); 715 error = EINVAL; 716 break; 717 } 718 ifp->if_flags &= ~(IFF_OACTIVE); 719 ifp->if_flags |= IFF_RUNNING; 720 ng_fec_init(ifp); 721 } 722 /* 723 * Bubble down changes in promisc mode to 724 * underlying interfaces. 725 */ 726 if ((ifp->if_flags & IFF_PROMISC) != 727 (priv->if_flags & IFF_PROMISC)) { 728 ng_fec_setport(ifp, command, data); 729 priv->if_flags = ifp->if_flags; 730 } 731 } else { 732 if (ifp->if_flags & IFF_RUNNING) 733 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 734 ng_fec_stop(ifp); 735 } 736 break; 737 738 case SIOCADDMULTI: 739 case SIOCDELMULTI: 740 ng_fec_setport(ifp, command, data); 741 error = 0; 742 break; 743 case SIOCGIFMEDIA: 744 case SIOCSIFMEDIA: 745 error = ifmedia_ioctl(ifp, ifr, &priv->ifmedia, command); 746 break; 747 /* Stuff that's not supported */ 748 case SIOCSIFPHYS: 749 error = EOPNOTSUPP; 750 break; 751 752 default: 753 error = EINVAL; 754 break; 755 } 756 (void) splx(s); 757 return (error); 758 } 759 760 /* 761 * This routine spies on mbufs received by underlying network device 762 * drivers. When we add an interface to our bundle, we override its 763 * if_input routine with a pointer to ng_fec_input(). This means we 764 * get to look at all the device's packets before sending them to the 765 * real ether_input() for processing by the stack. Once we verify the 766 * packet comes from an interface that's been aggregated into 767 * our bundle, we fix up the rcvif pointer and increment our 768 * packet counters so that it looks like the frames are actually 769 * coming from us. 770 */ 771 static void 772 ng_fec_input(struct ifnet *ifp, struct mbuf *m0) 773 { 774 struct ng_node *node; 775 struct ng_fec_private *priv; 776 struct ng_fec_bundle *b; 777 struct ifnet *bifp; 778 struct ng_fec_portlist *p; 779 780 /* Sanity check */ 781 if (ifp == NULL || m0 == NULL) 782 return; 783 784 node = IFP2NG(ifp); 785 786 /* Sanity check part II */ 787 if (node == NULL) 788 return; 789 790 priv = NG_NODE_PRIVATE(node); 791 b = &priv->fec_bundle; 792 bifp = &priv->arpcom.ac_if; 793 794 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 795 if (p->fec_if == m0->m_pkthdr.rcvif) 796 break; 797 } 798 799 /* Wasn't meant for us; leave this frame alone. */ 800 if (p == NULL) 801 return; 802 803 /* 804 * Check for a BPF tap on the underlying interface. This 805 * is mainly a debugging aid: it allows tcpdump-ing of an 806 * individual interface in a bundle to work, which it 807 * otherwise would not. BPF tapping of our own aggregate 808 * interface will occur once we call ether_input(). 809 */ 810 BPF_MTAP(m0->m_pkthdr.rcvif, m0); 811 812 /* Convince the system that this is our frame. */ 813 m0->m_pkthdr.rcvif = bifp; 814 bifp->if_ipackets++; 815 bifp->if_ibytes += m0->m_pkthdr.len + sizeof(struct ether_header); 816 817 (*bifp->if_input)(bifp, m0); 818 819 return; 820 } 821 822 /* 823 * Take a quick peek at the packet and see if it's ok for us to use 824 * the inet or inet6 hash methods on it, if they're enabled. We do 825 * this by setting flags in the mbuf header. Once we've made up our 826 * mind what to do, we pass the frame to output vector for further 827 * processing. 828 */ 829 830 static int 831 ng_fec_output(struct ifnet *ifp, struct mbuf *m, 832 struct sockaddr *dst, struct rtentry *rt0) 833 { 834 const priv_p priv = (priv_p) ifp->if_softc; 835 struct ng_fec_bundle *b; 836 int error; 837 838 /* Check interface flags */ 839 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) { 840 m_freem(m); 841 return (ENETDOWN); 842 } 843 844 b = &priv->fec_bundle; 845 846 switch (b->fec_btype) { 847 case FEC_BTYPE_MAC: 848 m->m_flags |= M_FEC_MAC; 849 break; 850 #ifdef INET 851 case FEC_BTYPE_INET: 852 /* 853 * We can't use the INET address port selection 854 * scheme if this isn't an INET packet. 855 */ 856 if (dst->sa_family == AF_INET) 857 m->m_flags |= M_FEC_INET; 858 #ifdef INET6 859 else if (dst->sa_family == AF_INET6) 860 m->m_flags |= M_FEC_INET6; 861 #endif 862 else { 863 #ifdef DEBUG 864 if_printf(ifp, "can't do inet aggregation of non " 865 "inet packet\n"); 866 #endif 867 m->m_flags |= M_FEC_MAC; 868 } 869 break; 870 #endif 871 default: 872 if_printf(ifp, "bogus hash type: %d\n", 873 b->fec_btype); 874 m_freem(m); 875 return(EINVAL); 876 break; 877 } 878 879 /* 880 * Pass the frame to the output vector for all the protocol 881 * handling. This will put the ethernet header on the packet 882 * for us. 883 */ 884 priv->if_error = 0; 885 error = (*b->fec_if_output)(ifp, m, dst, rt0); 886 if (priv->if_error && !error) 887 error = priv->if_error; 888 889 return(error); 890 } 891 892 /* 893 * Apply a hash to the source and destination addresses in the packet 894 * in order to select an interface. Also check link status and handle 895 * dead links accordingly. 896 */ 897 898 static int 899 ng_fec_choose_port(struct ng_fec_bundle *b, 900 struct mbuf *m, struct ifnet **ifp) 901 { 902 struct ether_header *eh; 903 struct mbuf *m0; 904 #ifdef INET 905 struct ip *ip; 906 #ifdef INET6 907 struct ip6_hdr *ip6; 908 #endif 909 #endif 910 911 struct ng_fec_portlist *p; 912 int port = 0, mask; 913 914 /* 915 * If there are only two ports, mask off all but the 916 * last bit for XORing. If there are 4, mask off all 917 * but the last 2 bits. 918 */ 919 mask = b->fec_ifcnt == 2 ? 0x1 : 0x3; 920 eh = mtod(m, struct ether_header *); 921 #ifdef INET 922 ip = (struct ip *)(mtod(m, char *) + 923 sizeof(struct ether_header)); 924 #ifdef INET6 925 ip6 = (struct ip6_hdr *)(mtod(m, char *) + 926 sizeof(struct ether_header)); 927 #endif 928 #endif 929 930 /* 931 * The fg_fec_output() routine is supposed to leave a 932 * flag for us in the mbuf that tells us what hash to 933 * use, but sometimes a new mbuf is prepended to the 934 * chain, so we have to search every mbuf in the chain 935 * to find the flags. 936 */ 937 m0 = m; 938 while (m0) { 939 if (m0->m_flags & (M_FEC_MAC|M_FEC_INET|M_FEC_INET6)) 940 break; 941 m0 = m0->m_next; 942 } 943 if (m0 == NULL) 944 return(EINVAL); 945 946 switch (m0->m_flags & (M_FEC_MAC|M_FEC_INET|M_FEC_INET6)) { 947 case M_FEC_MAC: 948 port = (eh->ether_dhost[5] ^ 949 eh->ether_shost[5]) & mask; 950 break; 951 #ifdef INET 952 case M_FEC_INET: 953 port = (ntohl(ip->ip_dst.s_addr) ^ 954 ntohl(ip->ip_src.s_addr)) & mask; 955 break; 956 #ifdef INET6 957 case M_FEC_INET6: 958 port = (ip6->ip6_dst.s6_addr[15] ^ 959 ip6->ip6_dst.s6_addr[15]) & mask; 960 break; 961 #endif 962 #endif 963 default: 964 return(EINVAL); 965 break; 966 } 967 968 TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) { 969 if (port == p->fec_idx) 970 break; 971 } 972 973 /* 974 * Now that we've chosen a port, make sure it's 975 * alive. If it's not alive, cycle through the bundle 976 * looking for a port that is alive. If we don't find 977 * any, return an error. 978 */ 979 if (p->fec_ifstat != 1) { 980 struct ng_fec_portlist *n = NULL; 981 982 n = TAILQ_NEXT(p, fec_list); 983 if (n == NULL) 984 n = TAILQ_FIRST(&b->ng_fec_ports); 985 while (n != p) { 986 if (n->fec_ifstat == 1) 987 break; 988 n = TAILQ_NEXT(n, fec_list); 989 if (n == NULL) 990 n = TAILQ_FIRST(&b->ng_fec_ports); 991 } 992 if (n == p) 993 return(EAGAIN); 994 p = n; 995 } 996 997 *ifp = p->fec_if; 998 999 return(0); 1000 } 1001 1002 /* 1003 * Now that the packet has been run through ether_output(), yank it 1004 * off our own send queue and stick it on the queue for the appropriate 1005 * underlying physical interface. Note that if the interface's send 1006 * queue is full, we save an error status in our private netgraph 1007 * space which will eventually be handed up to ng_fec_output(), which 1008 * will return it to the rest of the IP stack. We need to do this 1009 * in order to duplicate the effect of ether_output() returning ENOBUFS 1010 * when it detects that an interface's send queue is full. There's no 1011 * other way to signal the error status from here since the if_start() 1012 * routine is spec'ed to return void. 1013 * 1014 * Once the frame is queued, we call ether_output_frame() to initiate 1015 * transmission. 1016 */ 1017 static void 1018 ng_fec_start(struct ifnet *ifp) 1019 { 1020 struct ng_fec_private *priv; 1021 struct ng_fec_bundle *b; 1022 struct ifnet *oifp = NULL; 1023 struct mbuf *m0; 1024 int error; 1025 1026 priv = ifp->if_softc; 1027 b = &priv->fec_bundle; 1028 1029 IF_DEQUEUE(&ifp->if_snd, m0); 1030 if (m0 == NULL) 1031 return; 1032 1033 BPF_MTAP(ifp, m0); 1034 1035 /* Queue up packet on the proper port. */ 1036 error = ng_fec_choose_port(b, m0, &oifp); 1037 if (error) { 1038 ifp->if_ierrors++; 1039 m_freem(m0); 1040 priv->if_error = ENOBUFS; 1041 return; 1042 } 1043 ifp->if_opackets++; 1044 1045 priv->if_error = IF_HANDOFF(&oifp->if_snd, m0, oifp) ? 0 : ENOBUFS; 1046 1047 return; 1048 } 1049 1050 #ifdef DEBUG 1051 /* 1052 * Display an ioctl to the virtual interface 1053 */ 1054 1055 static void 1056 ng_fec_print_ioctl(struct ifnet *ifp, int command, caddr_t data) 1057 { 1058 char *str; 1059 1060 switch (command & IOC_DIRMASK) { 1061 case IOC_VOID: 1062 str = "IO"; 1063 break; 1064 case IOC_OUT: 1065 str = "IOR"; 1066 break; 1067 case IOC_IN: 1068 str = "IOW"; 1069 break; 1070 case IOC_INOUT: 1071 str = "IORW"; 1072 break; 1073 default: 1074 str = "IO??"; 1075 } 1076 log(LOG_DEBUG, "%s: %s('%c', %d, char[%d])\n", 1077 ifp->if_xname, 1078 str, 1079 IOCGROUP(command), 1080 command & 0xff, 1081 IOCPARM_LEN(command)); 1082 } 1083 #endif /* DEBUG */ 1084 1085 /************************************************************************ 1086 NETGRAPH NODE STUFF 1087 ************************************************************************/ 1088 1089 /* 1090 * Constructor for a node 1091 */ 1092 static int 1093 ng_fec_constructor(node_p node) 1094 { 1095 char ifname[NG_FEC_FEC_NAME_MAX + 1]; 1096 struct ifnet *ifp; 1097 priv_p priv; 1098 struct ng_fec_bundle *b; 1099 int error = 0; 1100 1101 /* Allocate node and interface private structures */ 1102 MALLOC(priv, priv_p, sizeof(*priv), M_NETGRAPH, M_NOWAIT); 1103 if (priv == NULL) 1104 return (ENOMEM); 1105 bzero(priv, sizeof(*priv)); 1106 1107 ifp = &priv->arpcom.ac_if; 1108 b = &priv->fec_bundle; 1109 1110 /* Link them together */ 1111 ifp->if_softc = priv; 1112 1113 /* Get an interface unit number */ 1114 if ((error = ng_fec_get_unit(&priv->unit)) != 0) { 1115 FREE(ifp, M_NETGRAPH); 1116 FREE(priv, M_NETGRAPH); 1117 return (error); 1118 } 1119 1120 /* Link together node and private info */ 1121 NG_NODE_SET_PRIVATE(node, priv); 1122 priv->node = node; 1123 1124 /* Initialize interface structure */ 1125 if_initname(ifp, NG_FEC_FEC_NAME, priv->unit); 1126 ifp->if_start = ng_fec_start; 1127 ifp->if_ioctl = ng_fec_ioctl; 1128 ifp->if_init = ng_fec_init; 1129 ifp->if_watchdog = NULL; 1130 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; 1131 ifp->if_mtu = NG_FEC_MTU_DEFAULT; 1132 ifp->if_flags = (IFF_SIMPLEX|IFF_BROADCAST|IFF_MULTICAST); 1133 ifp->if_type = IFT_PROPVIRTUAL; /* XXX */ 1134 ifp->if_addrlen = 0; /* XXX */ 1135 ifp->if_hdrlen = 0; /* XXX */ 1136 ifp->if_baudrate = 100000000; /* XXX */ 1137 TAILQ_INIT(&ifp->if_addrhead); /* XXX useless - done in if_attach */ 1138 1139 /* Give this node the same name as the interface (if possible) */ 1140 bzero(ifname, sizeof(ifname)); 1141 strlcpy(ifname, ifp->if_xname, sizeof(ifname)); 1142 if (ng_name_node(node, ifname) != 0) 1143 log(LOG_WARNING, "%s: can't acquire netgraph name\n", ifname); 1144 1145 /* Attach the interface */ 1146 ether_ifattach(ifp, priv->arpcom.ac_enaddr); 1147 callout_handle_init(&priv->fec_ch); 1148 1149 /* Override output method with our own */ 1150 ifp->if_output = ng_fec_output; 1151 1152 TAILQ_INIT(&b->ng_fec_ports); 1153 b->fec_ifcnt = 0; 1154 1155 ifmedia_init(&priv->ifmedia, 0, 1156 ng_fec_ifmedia_upd, ng_fec_ifmedia_sts); 1157 ifmedia_add(&priv->ifmedia, IFM_ETHER|IFM_NONE, 0, NULL); 1158 ifmedia_set(&priv->ifmedia, IFM_ETHER|IFM_NONE); 1159 1160 /* Done */ 1161 return (0); 1162 } 1163 1164 /* 1165 * Receive a control message 1166 */ 1167 static int 1168 ng_fec_rcvmsg(node_p node, item_p item, hook_p lasthook) 1169 { 1170 const priv_p priv = NG_NODE_PRIVATE(node); 1171 struct ng_fec_bundle *b; 1172 struct ng_mesg *resp = NULL; 1173 struct ng_mesg *msg; 1174 char *ifname; 1175 int error = 0; 1176 1177 NGI_GET_MSG(item, msg); 1178 b = &priv->fec_bundle; 1179 1180 switch (msg->header.typecookie) { 1181 case NGM_FEC_COOKIE: 1182 switch (msg->header.cmd) { 1183 case NGM_FEC_ADD_IFACE: 1184 ifname = msg->data; 1185 error = ng_fec_addport(priv, ifname); 1186 break; 1187 case NGM_FEC_DEL_IFACE: 1188 ifname = msg->data; 1189 error = ng_fec_delport(priv, ifname); 1190 break; 1191 case NGM_FEC_SET_MODE_MAC: 1192 b->fec_btype = FEC_BTYPE_MAC; 1193 break; 1194 #ifdef INET 1195 case NGM_FEC_SET_MODE_INET: 1196 b->fec_btype = FEC_BTYPE_INET; 1197 break; 1198 #ifdef INET6 1199 case NGM_FEC_SET_MODE_INET6: 1200 b->fec_btype = FEC_BTYPE_INET6; 1201 break; 1202 #endif 1203 #endif 1204 default: 1205 error = EINVAL; 1206 break; 1207 } 1208 break; 1209 default: 1210 error = EINVAL; 1211 break; 1212 } 1213 NG_RESPOND_MSG(error, node, item, resp); 1214 NG_FREE_MSG(msg); 1215 return (error); 1216 } 1217 1218 /* 1219 * Shutdown and remove the node and its associated interface. 1220 */ 1221 static int 1222 ng_fec_shutdown(node_p node) 1223 { 1224 const priv_p priv = NG_NODE_PRIVATE(node); 1225 struct ng_fec_bundle *b; 1226 struct ng_fec_portlist *p; 1227 1228 b = &priv->fec_bundle; 1229 ng_fec_stop(&priv->arpcom.ac_if); 1230 1231 while (!TAILQ_EMPTY(&b->ng_fec_ports)) { 1232 p = TAILQ_FIRST(&b->ng_fec_ports); 1233 ng_fec_delport(priv, p->fec_if->if_xname); 1234 } 1235 1236 ether_ifdetach(&priv->arpcom.ac_if); 1237 ifmedia_removeall(&priv->ifmedia); 1238 ng_fec_free_unit(priv->unit); 1239 FREE(priv, M_NETGRAPH); 1240 NG_NODE_SET_PRIVATE(node, NULL); 1241 NG_NODE_UNREF(node); 1242 return (0); 1243 }
Cache object: efac0add73c8838b02f4366be41fc873
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