altq_blue.c revision 1.12.8.2
1 /* $NetBSD: altq_blue.c,v 1.12.8.2 2006/08/11 15:40:58 yamt Exp $ */ 2 /* $KAME: altq_blue.c,v 1.8 2002/01/07 11:25:40 kjc Exp $ */ 3 4 /* 5 * Copyright (C) 1997-2000 6 * Sony Computer Science Laboratories Inc. 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 * 17 * THIS SOFTWARE IS PROVIDED BY SONY CSL AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL SONY CSL OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 */ 30 /* 31 * Copyright (c) 1990-1994 Regents of the University of California. 32 * All rights reserved. 33 * 34 * Redistribution and use in source and binary forms, with or without 35 * modification, are permitted provided that the following conditions 36 * are met: 37 * 1. Redistributions of source code must retain the above copyright 38 * notice, this list of conditions and the following disclaimer. 39 * 2. Redistributions in binary form must reproduce the above copyright 40 * notice, this list of conditions and the following disclaimer in the 41 * documentation and/or other materials provided with the distribution. 42 * 3. All advertising materials mentioning features or use of this software 43 * must display the following acknowledgement: 44 * This product includes software developed by the Computer Systems 45 * Engineering Group at Lawrence Berkeley Laboratory. 46 * 4. Neither the name of the University nor of the Laboratory may be used 47 * to endorse or promote products derived from this software without 48 * specific prior written permission. 49 * 50 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 53 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 60 * SUCH DAMAGE. 61 */ 62 63 #include <sys/cdefs.h> 64 __KERNEL_RCSID(0, "$NetBSD: altq_blue.c,v 1.12.8.2 2006/08/11 15:40:58 yamt Exp $"); 65 66 #if defined(__FreeBSD__) || defined(__NetBSD__) 67 #include "opt_altq.h" 68 #if (__FreeBSD__ != 2) 69 #include "opt_inet.h" 70 #ifdef __FreeBSD__ 71 #include "opt_inet6.h" 72 #endif 73 #endif 74 #endif /* __FreeBSD__ || __NetBSD__ */ 75 #ifdef ALTQ_BLUE /* blue is enabled by ALTQ_BLUE option in opt_altq.h */ 76 77 #include <sys/param.h> 78 #include <sys/malloc.h> 79 #include <sys/mbuf.h> 80 #include <sys/socket.h> 81 #include <sys/sockio.h> 82 #include <sys/systm.h> 83 #include <sys/proc.h> 84 #include <sys/errno.h> 85 #include <sys/kernel.h> 86 #include <sys/kauth.h> 87 88 #include <net/if.h> 89 #include <net/if_types.h> 90 #include <netinet/in.h> 91 #include <netinet/in_systm.h> 92 #include <netinet/ip.h> 93 #ifdef INET6 94 #include <netinet/ip6.h> 95 #endif 96 97 #include <altq/altq.h> 98 #include <altq/altq_conf.h> 99 #include <altq/altq_blue.h> 100 101 /* 102 * Blue is proposed and implemented by Wu-chang Feng <wuchang (at) eecs.umich.edu>. 103 * more information on Blue is available from 104 * http://www.thefengs.com/wuchang/work/blue/ 105 */ 106 107 /* fixed-point uses 12-bit decimal places */ 108 #define FP_SHIFT 12 /* fixed-point shift */ 109 110 #define BLUE_LIMIT 200 /* default max queue length */ 111 112 /* blue_list keeps all blue_state_t's allocated. */ 113 static blue_queue_t *blue_list = NULL; 114 115 /* internal function prototypes */ 116 static int blue_enqueue __P((struct ifaltq *, struct mbuf *, 117 struct altq_pktattr *)); 118 static struct mbuf *blue_dequeue __P((struct ifaltq *, int)); 119 static int drop_early __P((blue_t *)); 120 static int mark_ecn __P((struct mbuf *, struct altq_pktattr *, int)); 121 static int blue_detach __P((blue_queue_t *)); 122 static int blue_request __P((struct ifaltq *, int, void *)); 123 124 /* 125 * blue device interface 126 */ 127 altqdev_decl(blue); 128 129 int 130 blueopen(dev, flag, fmt, l) 131 dev_t dev; 132 int flag, fmt; 133 struct lwp *l; 134 { 135 /* everything will be done when the queueing scheme is attached. */ 136 return 0; 137 } 138 139 int 140 blueclose(dev, flag, fmt, l) 141 dev_t dev; 142 int flag, fmt; 143 struct lwp *l; 144 { 145 blue_queue_t *rqp; 146 int err, error = 0; 147 148 while ((rqp = blue_list) != NULL) { 149 /* destroy all */ 150 err = blue_detach(rqp); 151 if (err != 0 && error == 0) 152 error = err; 153 } 154 155 return error; 156 } 157 158 int 159 blueioctl(dev, cmd, addr, flag, l) 160 dev_t dev; 161 ioctlcmd_t cmd; 162 caddr_t addr; 163 int flag; 164 struct lwp *l; 165 { 166 blue_queue_t *rqp; 167 struct blue_interface *ifacep; 168 struct ifnet *ifp; 169 int error = 0; 170 171 /* check super-user privilege */ 172 switch (cmd) { 173 case BLUE_GETSTATS: 174 break; 175 default: 176 #if (__FreeBSD_version > 400000) 177 if ((error = suser(p)) != 0) 178 return (error); 179 #else 180 if ((error = kauth_authorize_generic(l->l_cred, 181 KAUTH_GENERIC_ISSUSER, &l->l_acflag)) != 0) 182 return (error); 183 #endif 184 break; 185 } 186 187 switch (cmd) { 188 189 case BLUE_ENABLE: 190 ifacep = (struct blue_interface *)addr; 191 if ((rqp = altq_lookup(ifacep->blue_ifname, ALTQT_BLUE)) == NULL) { 192 error = EBADF; 193 break; 194 } 195 error = altq_enable(rqp->rq_ifq); 196 break; 197 198 case BLUE_DISABLE: 199 ifacep = (struct blue_interface *)addr; 200 if ((rqp = altq_lookup(ifacep->blue_ifname, ALTQT_BLUE)) == NULL) { 201 error = EBADF; 202 break; 203 } 204 error = altq_disable(rqp->rq_ifq); 205 break; 206 207 case BLUE_IF_ATTACH: 208 ifp = ifunit(((struct blue_interface *)addr)->blue_ifname); 209 if (ifp == NULL) { 210 error = ENXIO; 211 break; 212 } 213 214 /* allocate and initialize blue_state_t */ 215 rqp = malloc(sizeof(blue_queue_t), M_DEVBUF, M_WAITOK|M_ZERO); 216 if (rqp == NULL) { 217 error = ENOMEM; 218 break; 219 } 220 221 rqp->rq_q = malloc(sizeof(class_queue_t), M_DEVBUF, 222 M_WAITOK|M_ZERO); 223 if (rqp->rq_q == NULL) { 224 free(rqp, M_DEVBUF); 225 error = ENOMEM; 226 break; 227 } 228 229 rqp->rq_blue = malloc(sizeof(blue_t), M_DEVBUF, 230 M_WAITOK|M_ZERO); 231 if (rqp->rq_blue == NULL) { 232 free(rqp->rq_q, M_DEVBUF); 233 free(rqp, M_DEVBUF); 234 error = ENOMEM; 235 break; 236 } 237 238 rqp->rq_ifq = &ifp->if_snd; 239 qtail(rqp->rq_q) = NULL; 240 qlen(rqp->rq_q) = 0; 241 qlimit(rqp->rq_q) = BLUE_LIMIT; 242 243 /* default packet time: 1000 bytes / 10Mbps * 8 * 1000000 */ 244 blue_init(rqp->rq_blue, 0, 800, 1000, 50000); 245 246 /* 247 * set BLUE to this ifnet structure. 248 */ 249 error = altq_attach(rqp->rq_ifq, ALTQT_BLUE, rqp, 250 blue_enqueue, blue_dequeue, blue_request, 251 NULL, NULL); 252 if (error) { 253 free(rqp->rq_blue, M_DEVBUF); 254 free(rqp->rq_q, M_DEVBUF); 255 free(rqp, M_DEVBUF); 256 break; 257 } 258 259 /* add this state to the blue list */ 260 rqp->rq_next = blue_list; 261 blue_list = rqp; 262 break; 263 264 case BLUE_IF_DETACH: 265 ifacep = (struct blue_interface *)addr; 266 if ((rqp = altq_lookup(ifacep->blue_ifname, ALTQT_BLUE)) == NULL) { 267 error = EBADF; 268 break; 269 } 270 error = blue_detach(rqp); 271 break; 272 273 case BLUE_GETSTATS: 274 do { 275 struct blue_stats *q_stats; 276 blue_t *rp; 277 278 q_stats = (struct blue_stats *)addr; 279 if ((rqp = altq_lookup(q_stats->iface.blue_ifname, 280 ALTQT_BLUE)) == NULL) { 281 error = EBADF; 282 break; 283 } 284 285 q_stats->q_len = qlen(rqp->rq_q); 286 q_stats->q_limit = qlimit(rqp->rq_q); 287 288 rp = rqp->rq_blue; 289 q_stats->q_pmark = rp->blue_pmark; 290 q_stats->xmit_packets = rp->blue_stats.xmit_packets; 291 q_stats->xmit_bytes = rp->blue_stats.xmit_bytes; 292 q_stats->drop_packets = rp->blue_stats.drop_packets; 293 q_stats->drop_bytes = rp->blue_stats.drop_bytes; 294 q_stats->drop_forced = rp->blue_stats.drop_forced; 295 q_stats->drop_unforced = rp->blue_stats.drop_unforced; 296 q_stats->marked_packets = rp->blue_stats.marked_packets; 297 298 } while (0); 299 break; 300 301 case BLUE_CONFIG: 302 do { 303 struct blue_conf *fc; 304 int limit; 305 306 fc = (struct blue_conf *)addr; 307 if ((rqp = altq_lookup(fc->iface.blue_ifname, 308 ALTQT_BLUE)) == NULL) { 309 error = EBADF; 310 break; 311 } 312 limit = fc->blue_limit; 313 qlimit(rqp->rq_q) = limit; 314 fc->blue_limit = limit; /* write back the new value */ 315 if (fc->blue_pkttime > 0) 316 rqp->rq_blue->blue_pkttime = fc->blue_pkttime; 317 if (fc->blue_max_pmark > 0) 318 rqp->rq_blue->blue_max_pmark = fc->blue_max_pmark; 319 if (fc->blue_hold_time > 0) 320 rqp->rq_blue->blue_hold_time = fc->blue_hold_time; 321 rqp->rq_blue->blue_flags = fc->blue_flags; 322 323 blue_init(rqp->rq_blue, rqp->rq_blue->blue_flags, 324 rqp->rq_blue->blue_pkttime, 325 rqp->rq_blue->blue_max_pmark, 326 rqp->rq_blue->blue_hold_time); 327 } while (0); 328 break; 329 330 default: 331 error = EINVAL; 332 break; 333 } 334 return error; 335 } 336 337 static int blue_detach(rqp) 338 blue_queue_t *rqp; 339 { 340 blue_queue_t *tmp; 341 int error = 0; 342 343 if (ALTQ_IS_ENABLED(rqp->rq_ifq)) 344 altq_disable(rqp->rq_ifq); 345 346 if ((error = altq_detach(rqp->rq_ifq))) 347 return (error); 348 349 if (blue_list == rqp) 350 blue_list = rqp->rq_next; 351 else { 352 for (tmp = blue_list; tmp != NULL; tmp = tmp->rq_next) 353 if (tmp->rq_next == rqp) { 354 tmp->rq_next = rqp->rq_next; 355 break; 356 } 357 if (tmp == NULL) 358 printf("blue_detach: no state found in blue_list!\n"); 359 } 360 361 free(rqp->rq_q, M_DEVBUF); 362 free(rqp->rq_blue, M_DEVBUF); 363 free(rqp, M_DEVBUF); 364 return (error); 365 } 366 367 /* 368 * blue support routines 369 */ 370 371 int 372 blue_init(rp, flags, pkttime, blue_max_pmark, blue_hold_time) 373 blue_t *rp; 374 int flags; 375 int pkttime; 376 int blue_max_pmark; 377 int blue_hold_time; 378 { 379 int npkts_per_sec; 380 381 rp->blue_idle = 1; 382 rp->blue_flags = flags; 383 rp->blue_pkttime = pkttime; 384 rp->blue_max_pmark = blue_max_pmark; 385 rp->blue_hold_time = blue_hold_time; 386 if (pkttime == 0) 387 rp->blue_pkttime = 1; 388 389 /* when the link is very slow, adjust blue parameters */ 390 npkts_per_sec = 1000000 / rp->blue_pkttime; 391 if (npkts_per_sec < 50) { 392 } 393 else if (npkts_per_sec < 300) { 394 } 395 396 microtime(&rp->blue_last); 397 return (0); 398 } 399 400 /* 401 * enqueue routine: 402 * 403 * returns: 0 when successfully queued. 404 * ENOBUFS when drop occurs. 405 */ 406 static int 407 blue_enqueue(ifq, m, pktattr) 408 struct ifaltq *ifq; 409 struct mbuf *m; 410 struct altq_pktattr *pktattr; 411 { 412 blue_queue_t *rqp = (blue_queue_t *)ifq->altq_disc; 413 int error = 0; 414 415 if (blue_addq(rqp->rq_blue, rqp->rq_q, m, pktattr) == 0) 416 ifq->ifq_len++; 417 else 418 error = ENOBUFS; 419 return error; 420 } 421 422 #define DTYPE_NODROP 0 /* no drop */ 423 #define DTYPE_FORCED 1 /* a "forced" drop */ 424 #define DTYPE_EARLY 2 /* an "unforced" (early) drop */ 425 426 int 427 blue_addq(rp, q, m, pktattr) 428 blue_t *rp; 429 class_queue_t *q; 430 struct mbuf *m; 431 struct altq_pktattr *pktattr; 432 { 433 int droptype; 434 435 /* 436 * if we were idle, this is an enqueue onto an empty queue 437 * and we should decrement marking probability 438 * 439 */ 440 if (rp->blue_idle) { 441 struct timeval now; 442 int t; 443 rp->blue_idle = 0; 444 microtime(&now); 445 t = (now.tv_sec - rp->blue_last.tv_sec); 446 if ( t > 1) { 447 rp->blue_pmark = 1; 448 microtime(&rp->blue_last); 449 } else { 450 t = t * 1000000 + (now.tv_usec - rp->blue_last.tv_usec); 451 if (t > rp->blue_hold_time) { 452 rp->blue_pmark--; 453 if (rp->blue_pmark < 0) rp->blue_pmark = 0; 454 microtime(&rp->blue_last); 455 } 456 } 457 } 458 459 /* see if we drop early */ 460 droptype = DTYPE_NODROP; 461 if (drop_early(rp) && qlen(q) > 1) { 462 /* mark or drop by blue */ 463 if ((rp->blue_flags & BLUEF_ECN) && 464 mark_ecn(m, pktattr, rp->blue_flags)) { 465 /* successfully marked. do not drop. */ 466 #ifdef BLUE_STATS 467 rp->blue_stats.marked_packets++; 468 #endif 469 } else { 470 /* unforced drop by blue */ 471 droptype = DTYPE_EARLY; 472 } 473 } 474 475 /* 476 * if the queue length hits the hard limit, it's a forced drop. 477 */ 478 if (droptype == DTYPE_NODROP && qlen(q) >= qlimit(q)) 479 droptype = DTYPE_FORCED; 480 481 /* if successful or forced drop, enqueue this packet. */ 482 if (droptype != DTYPE_EARLY) 483 _addq(q, m); 484 485 if (droptype != DTYPE_NODROP) { 486 if (droptype == DTYPE_EARLY) { 487 /* drop the incoming packet */ 488 #ifdef BLUE_STATS 489 rp->blue_stats.drop_unforced++; 490 #endif 491 } else { 492 struct timeval now; 493 int t; 494 /* forced drop, select a victim packet in the queue. */ 495 m = _getq_random(q); 496 microtime(&now); 497 t = (now.tv_sec - rp->blue_last.tv_sec); 498 t = t * 1000000 + (now.tv_usec - rp->blue_last.tv_usec); 499 if (t > rp->blue_hold_time) { 500 rp->blue_pmark += rp->blue_max_pmark >> 3; 501 if (rp->blue_pmark > rp->blue_max_pmark) 502 rp->blue_pmark = rp->blue_max_pmark; 503 microtime(&rp->blue_last); 504 } 505 #ifdef BLUE_STATS 506 rp->blue_stats.drop_forced++; 507 #endif 508 } 509 #ifdef BLUE_STATS 510 rp->blue_stats.drop_packets++; 511 rp->blue_stats.drop_bytes += m->m_pkthdr.len; 512 #endif 513 m_freem(m); 514 return (-1); 515 } 516 /* successfully queued */ 517 return (0); 518 } 519 520 /* 521 * early-drop probability is kept in blue_pmark 522 * 523 */ 524 static int 525 drop_early(rp) 526 blue_t *rp; 527 { 528 if ((random() % rp->blue_max_pmark) < rp->blue_pmark) { 529 /* drop or mark */ 530 return (1); 531 } 532 /* no drop/mark */ 533 return (0); 534 } 535 536 /* 537 * try to mark CE bit to the packet. 538 * returns 1 if successfully marked, 0 otherwise. 539 */ 540 static int 541 mark_ecn(m, pktattr, flags) 542 struct mbuf *m; 543 struct altq_pktattr *pktattr; 544 int flags; 545 { 546 struct mbuf *m0; 547 548 if (pktattr == NULL || 549 (pktattr->pattr_af != AF_INET && pktattr->pattr_af != AF_INET6)) 550 return (0); 551 552 /* verify that pattr_hdr is within the mbuf data */ 553 for (m0 = m; m0 != NULL; m0 = m0->m_next) 554 if ((pktattr->pattr_hdr >= m0->m_data) && 555 (pktattr->pattr_hdr < m0->m_data + m0->m_len)) 556 break; 557 if (m0 == NULL) { 558 /* ick, pattr_hdr is stale */ 559 pktattr->pattr_af = AF_UNSPEC; 560 return (0); 561 } 562 563 switch (pktattr->pattr_af) { 564 case AF_INET: 565 if (flags & BLUEF_ECN4) { 566 struct ip *ip = (struct ip *)pktattr->pattr_hdr; 567 u_int8_t otos; 568 int sum; 569 570 if (ip->ip_v != 4) 571 return (0); /* version mismatch! */ 572 if ((ip->ip_tos & IPTOS_ECN_MASK) == IPTOS_ECN_NOTECT) 573 return (0); /* not-ECT */ 574 if ((ip->ip_tos & IPTOS_ECN_MASK) == IPTOS_ECN_CE) 575 return (1); /* already marked */ 576 577 /* 578 * ecn-capable but not marked, 579 * mark CE and update checksum 580 */ 581 otos = ip->ip_tos; 582 ip->ip_tos |= IPTOS_ECN_CE; 583 /* 584 * update checksum (from RFC1624) 585 * HC' = ~(~HC + ~m + m') 586 */ 587 sum = ~ntohs(ip->ip_sum) & 0xffff; 588 sum += (~otos & 0xffff) + ip->ip_tos; 589 sum = (sum >> 16) + (sum & 0xffff); 590 sum += (sum >> 16); /* add carry */ 591 ip->ip_sum = htons(~sum & 0xffff); 592 return (1); 593 } 594 break; 595 #ifdef INET6 596 case AF_INET6: 597 if (flags & BLUEF_ECN6) { 598 struct ip6_hdr *ip6 = (struct ip6_hdr *)pktattr->pattr_hdr; 599 u_int32_t flowlabel; 600 601 flowlabel = ntohl(ip6->ip6_flow); 602 if ((flowlabel >> 28) != 6) 603 return (0); /* version mismatch! */ 604 if ((flowlabel & (IPTOS_ECN_MASK << 20)) == 605 (IPTOS_ECN_NOTECT << 20)) 606 return (0); /* not-ECT */ 607 if ((flowlabel & (IPTOS_ECN_MASK << 20)) == 608 (IPTOS_ECN_CE << 20)) 609 return (1); /* already marked */ 610 /* 611 * ecn-capable but not marked, mark CE 612 */ 613 flowlabel |= (IPTOS_ECN_CE << 20); 614 ip6->ip6_flow = htonl(flowlabel); 615 return (1); 616 } 617 break; 618 #endif /* INET6 */ 619 } 620 621 /* not marked */ 622 return (0); 623 } 624 625 /* 626 * dequeue routine: 627 * must be called in splnet. 628 * 629 * returns: mbuf dequeued. 630 * NULL when no packet is available in the queue. 631 */ 632 633 static struct mbuf * 634 blue_dequeue(ifq, op) 635 struct ifaltq *ifq; 636 int op; 637 { 638 blue_queue_t *rqp = (blue_queue_t *)ifq->altq_disc; 639 struct mbuf *m = NULL; 640 641 if (op == ALTDQ_POLL) 642 return (qhead(rqp->rq_q)); 643 644 m = blue_getq(rqp->rq_blue, rqp->rq_q); 645 if (m != NULL) 646 ifq->ifq_len--; 647 return m; 648 } 649 650 struct mbuf *blue_getq(rp, q) 651 blue_t *rp; 652 class_queue_t *q; 653 { 654 struct mbuf *m; 655 656 if ((m = _getq(q)) == NULL) { 657 if (rp->blue_idle == 0) { 658 rp->blue_idle = 1; 659 microtime(&rp->blue_last); 660 } 661 return NULL; 662 } 663 664 rp->blue_idle = 0; 665 #ifdef BLUE_STATS 666 rp->blue_stats.xmit_packets++; 667 rp->blue_stats.xmit_bytes += m->m_pkthdr.len; 668 #endif 669 return (m); 670 } 671 672 static int 673 blue_request(ifq, req, arg) 674 struct ifaltq *ifq; 675 int req; 676 void *arg; 677 { 678 blue_queue_t *rqp = (blue_queue_t *)ifq->altq_disc; 679 680 switch (req) { 681 case ALTRQ_PURGE: 682 _flushq(rqp->rq_q); 683 if (ALTQ_IS_ENABLED(ifq)) 684 ifq->ifq_len = 0; 685 break; 686 } 687 return (0); 688 } 689 690 691 #ifdef KLD_MODULE 692 693 static struct altqsw blue_sw = 694 {"blue", blueopen, blueclose, blueioctl}; 695 696 ALTQ_MODULE(altq_blue, ALTQT_BLUE, &blue_sw); 697 698 #endif /* KLD_MODULE */ 699 700 #endif /* ALTQ_BLUE */ 701
Indexes created Wed Oct 22 13:09:56 GMT 2025