1/* $FreeBSD$ */ 2/* $KAME: altq_priq.c,v 1.11 2003/09/17 14:23:25 kjc Exp $ */ 3/* 4 * Copyright (C) 2000-2003 5 * Sony Computer Science Laboratories Inc. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY SONY CSL AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL SONY CSL OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28/* 29 * priority queue 30 */ 31 32#if defined(__FreeBSD__) || defined(__NetBSD__) 33#include "opt_altq.h" 34#include "opt_inet.h" 35#ifdef __FreeBSD__ 36#include "opt_inet6.h" 37#endif 38#endif /* __FreeBSD__ || __NetBSD__ */ 39 40#ifdef ALTQ_PRIQ /* priq is enabled by ALTQ_PRIQ option in opt_altq.h */ 41 42#include <sys/param.h> 43#include <sys/malloc.h> 44#include <sys/mbuf.h> 45#include <sys/socket.h> 46#include <sys/sockio.h> 47#include <sys/systm.h> 48#include <sys/proc.h> 49#include <sys/errno.h> 50#include <sys/kernel.h> 51#include <sys/queue.h> 52 53#include <net/if.h> 54#include <netinet/in.h> 55 56#include <net/pfvar.h> 57#include <altq/altq.h> 58#ifdef ALTQ3_COMPAT 59#include <altq/altq_conf.h> 60#endif 61#include <altq/altq_priq.h> 62 63/* 64 * function prototypes 65 */ 66#ifdef ALTQ3_COMPAT 67static struct priq_if *priq_attach(struct ifaltq *, u_int); 68static int priq_detach(struct priq_if *); 69#endif 70static int priq_clear_interface(struct priq_if *); 71static int priq_request(struct ifaltq *, int, void *); 72static void priq_purge(struct priq_if *); 73static struct priq_class *priq_class_create(struct priq_if *, int, int, int, 74 int); 75static int priq_class_destroy(struct priq_class *); 76static int priq_enqueue(struct ifaltq *, struct mbuf *, struct altq_pktattr *); 77static struct mbuf *priq_dequeue(struct ifaltq *, int); 78 79static int priq_addq(struct priq_class *, struct mbuf *); 80static struct mbuf *priq_getq(struct priq_class *); 81static struct mbuf *priq_pollq(struct priq_class *); 82static void priq_purgeq(struct priq_class *); 83 84#ifdef ALTQ3_COMPAT 85static int priqcmd_if_attach(struct priq_interface *); 86static int priqcmd_if_detach(struct priq_interface *); 87static int priqcmd_add_class(struct priq_add_class *); 88static int priqcmd_delete_class(struct priq_delete_class *); 89static int priqcmd_modify_class(struct priq_modify_class *); 90static int priqcmd_add_filter(struct priq_add_filter *); 91static int priqcmd_delete_filter(struct priq_delete_filter *); 92static int priqcmd_class_stats(struct priq_class_stats *); 93#endif /* ALTQ3_COMPAT */ 94 95static void get_class_stats(struct priq_classstats *, struct priq_class *); 96static struct priq_class *clh_to_clp(struct priq_if *, u_int32_t); 97 98#ifdef ALTQ3_COMPAT 99altqdev_decl(priq); 100 101/* pif_list keeps all priq_if's allocated. */ 102static struct priq_if *pif_list = NULL; 103#endif /* ALTQ3_COMPAT */ 104 105int 106priq_pfattach(struct pf_altq *a) 107{ 108 struct ifnet *ifp; 109 int s, error; 110 111 if ((ifp = ifunit(a->ifname)) == NULL || a->altq_disc == NULL) 112 return (EINVAL); 113#ifdef __NetBSD__ 114 s = splnet(); 115#else 116 s = splimp(); 117#endif 118 error = altq_attach(&ifp->if_snd, ALTQT_PRIQ, a->altq_disc, 119 priq_enqueue, priq_dequeue, priq_request, NULL, NULL); 120 splx(s); 121 return (error); 122} 123 124int 125priq_add_altq(struct pf_altq *a) 126{ 127 struct priq_if *pif; 128 struct ifnet *ifp; 129 130 if ((ifp = ifunit(a->ifname)) == NULL) 131 return (EINVAL); 132 if (!ALTQ_IS_READY(&ifp->if_snd)) 133 return (ENODEV); 134 135 pif = malloc(sizeof(struct priq_if), M_DEVBUF, M_NOWAIT | M_ZERO); 136 if (pif == NULL) 137 return (ENOMEM); 138 pif->pif_bandwidth = a->ifbandwidth; 139 pif->pif_maxpri = -1; 140 pif->pif_ifq = &ifp->if_snd; 141 142 /* keep the state in pf_altq */ 143 a->altq_disc = pif; 144 145 return (0); 146} 147 148int 149priq_remove_altq(struct pf_altq *a) 150{ 151 struct priq_if *pif; 152 153 if ((pif = a->altq_disc) == NULL) 154 return (EINVAL); 155 a->altq_disc = NULL; 156 157 (void)priq_clear_interface(pif); 158 159 free(pif, M_DEVBUF); 160 return (0); 161} 162 163int 164priq_add_queue(struct pf_altq *a) 165{ 166 struct priq_if *pif; 167 struct priq_class *cl; 168 169 if ((pif = a->altq_disc) == NULL) 170 return (EINVAL); 171 172 /* check parameters */ 173 if (a->priority >= PRIQ_MAXPRI) 174 return (EINVAL); 175 if (a->qid == 0) 176 return (EINVAL); 177 if (pif->pif_classes[a->priority] != NULL) 178 return (EBUSY); 179 if (clh_to_clp(pif, a->qid) != NULL) 180 return (EBUSY); 181 182 cl = priq_class_create(pif, a->priority, a->qlimit, 183 a->pq_u.priq_opts.flags, a->qid); 184 if (cl == NULL) 185 return (ENOMEM); 186 187 return (0); 188} 189 190int 191priq_remove_queue(struct pf_altq *a) 192{ 193 struct priq_if *pif; 194 struct priq_class *cl; 195 196 if ((pif = a->altq_disc) == NULL) 197 return (EINVAL); 198 199 if ((cl = clh_to_clp(pif, a->qid)) == NULL) 200 return (EINVAL); 201 202 return (priq_class_destroy(cl)); 203} 204 205int 206priq_getqstats(struct pf_altq *a, void *ubuf, int *nbytes) 207{ 208 struct priq_if *pif; 209 struct priq_class *cl; 210 struct priq_classstats stats; 211 int error = 0; 212 213 if ((pif = altq_lookup(a->ifname, ALTQT_PRIQ)) == NULL) 214 return (EBADF); 215 216 if ((cl = clh_to_clp(pif, a->qid)) == NULL) 217 return (EINVAL); 218 219 if (*nbytes < sizeof(stats)) 220 return (EINVAL); 221 222 get_class_stats(&stats, cl); 223 224 if ((error = copyout((caddr_t)&stats, ubuf, sizeof(stats))) != 0) 225 return (error); 226 *nbytes = sizeof(stats); 227 return (0); 228} 229 230/* 231 * bring the interface back to the initial state by discarding 232 * all the filters and classes. 233 */ 234static int 235priq_clear_interface(struct priq_if *pif) 236{ 237 struct priq_class *cl; 238 int pri; 239 240#ifdef ALTQ3_CLFIER_COMPAT 241 /* free the filters for this interface */ 242 acc_discard_filters(&pif->pif_classifier, NULL, 1); 243#endif 244 245 /* clear out the classes */ 246 for (pri = 0; pri <= pif->pif_maxpri; pri++) 247 if ((cl = pif->pif_classes[pri]) != NULL) 248 priq_class_destroy(cl); 249 250 return (0); 251} 252 253static int 254priq_request(struct ifaltq *ifq, int req, void *arg) 255{ 256 struct priq_if *pif = (struct priq_if *)ifq->altq_disc; 257 258 IFQ_LOCK_ASSERT(ifq); 259 260 switch (req) { 261 case ALTRQ_PURGE: 262 priq_purge(pif); 263 break; 264 } 265 return (0); 266} 267 268/* discard all the queued packets on the interface */ 269static void 270priq_purge(struct priq_if *pif) 271{ 272 struct priq_class *cl; 273 int pri; 274 275 for (pri = 0; pri <= pif->pif_maxpri; pri++) { 276 if ((cl = pif->pif_classes[pri]) != NULL && !qempty(cl->cl_q)) 277 priq_purgeq(cl); 278 } 279 if (ALTQ_IS_ENABLED(pif->pif_ifq)) 280 pif->pif_ifq->ifq_len = 0; 281} 282 283static struct priq_class * 284priq_class_create(struct priq_if *pif, int pri, int qlimit, int flags, int qid) 285{ 286 struct priq_class *cl; 287 int s; 288 289#ifndef ALTQ_RED 290 if (flags & PRCF_RED) { 291#ifdef ALTQ_DEBUG 292 printf("priq_class_create: RED not configured for PRIQ!\n"); 293#endif 294 return (NULL); 295 } 296#endif 297 298 if ((cl = pif->pif_classes[pri]) != NULL) { 299 /* modify the class instead of creating a new one */ 300#ifdef __NetBSD__ 301 s = splnet(); 302#else 303 s = splimp(); 304#endif 305 IFQ_LOCK(cl->cl_pif->pif_ifq); 306 if (!qempty(cl->cl_q)) 307 priq_purgeq(cl); 308 IFQ_UNLOCK(cl->cl_pif->pif_ifq); 309 splx(s); 310#ifdef ALTQ_RIO 311 if (q_is_rio(cl->cl_q)) 312 rio_destroy((rio_t *)cl->cl_red); 313#endif 314#ifdef ALTQ_RED 315 if (q_is_red(cl->cl_q)) 316 red_destroy(cl->cl_red); 317#endif 318 } else { 319 cl = malloc(sizeof(struct priq_class), M_DEVBUF, 320 M_NOWAIT | M_ZERO); 321 if (cl == NULL) 322 return (NULL); 323 324 cl->cl_q = malloc(sizeof(class_queue_t), M_DEVBUF, 325 M_NOWAIT | M_ZERO); 326 if (cl->cl_q == NULL) 327 goto err_ret; 328 } 329 330 pif->pif_classes[pri] = cl; 331 if (flags & PRCF_DEFAULTCLASS) 332 pif->pif_default = cl; 333 if (qlimit == 0) 334 qlimit = 50; /* use default */ 335 qlimit(cl->cl_q) = qlimit; 336 qtype(cl->cl_q) = Q_DROPTAIL; 337 qlen(cl->cl_q) = 0; 338 cl->cl_flags = flags; 339 cl->cl_pri = pri; 340 if (pri > pif->pif_maxpri) 341 pif->pif_maxpri = pri; 342 cl->cl_pif = pif; 343 cl->cl_handle = qid; 344 345#ifdef ALTQ_RED 346 if (flags & (PRCF_RED|PRCF_RIO)) { 347 int red_flags, red_pkttime; 348 349 red_flags = 0; 350 if (flags & PRCF_ECN) 351 red_flags |= REDF_ECN; 352#ifdef ALTQ_RIO 353 if (flags & PRCF_CLEARDSCP) 354 red_flags |= RIOF_CLEARDSCP; 355#endif 356 if (pif->pif_bandwidth < 8) 357 red_pkttime = 1000 * 1000 * 1000; /* 1 sec */ 358 else 359 red_pkttime = (int64_t)pif->pif_ifq->altq_ifp->if_mtu 360 * 1000 * 1000 * 1000 / (pif->pif_bandwidth / 8); 361#ifdef ALTQ_RIO 362 if (flags & PRCF_RIO) { 363 cl->cl_red = (red_t *)rio_alloc(0, NULL, 364 red_flags, red_pkttime); 365 if (cl->cl_red == NULL) 366 goto err_ret; 367 qtype(cl->cl_q) = Q_RIO; 368 } else 369#endif 370 if (flags & PRCF_RED) { 371 cl->cl_red = red_alloc(0, 0, 372 qlimit(cl->cl_q) * 10/100, 373 qlimit(cl->cl_q) * 30/100, 374 red_flags, red_pkttime); 375 if (cl->cl_red == NULL) 376 goto err_ret; 377 qtype(cl->cl_q) = Q_RED; 378 } 379 } 380#endif /* ALTQ_RED */ 381 382 return (cl); 383 384 err_ret: 385 if (cl->cl_red != NULL) { 386#ifdef ALTQ_RIO 387 if (q_is_rio(cl->cl_q)) 388 rio_destroy((rio_t *)cl->cl_red); 389#endif 390#ifdef ALTQ_RED 391 if (q_is_red(cl->cl_q)) 392 red_destroy(cl->cl_red); 393#endif 394 } 395 if (cl->cl_q != NULL) 396 free(cl->cl_q, M_DEVBUF); 397 free(cl, M_DEVBUF); 398 return (NULL); 399} 400 401static int 402priq_class_destroy(struct priq_class *cl) 403{ 404 struct priq_if *pif; 405 int s, pri; 406 407#ifdef __NetBSD__ 408 s = splnet(); 409#else 410 s = splimp(); 411#endif 412 IFQ_LOCK(cl->cl_pif->pif_ifq); 413 414#ifdef ALTQ3_CLFIER_COMPAT 415 /* delete filters referencing to this class */ 416 acc_discard_filters(&cl->cl_pif->pif_classifier, cl, 0); 417#endif 418 419 if (!qempty(cl->cl_q)) 420 priq_purgeq(cl); 421 422 pif = cl->cl_pif; 423 pif->pif_classes[cl->cl_pri] = NULL; 424 if (pif->pif_maxpri == cl->cl_pri) { 425 for (pri = cl->cl_pri; pri >= 0; pri--) 426 if (pif->pif_classes[pri] != NULL) { 427 pif->pif_maxpri = pri; 428 break; 429 } 430 if (pri < 0) 431 pif->pif_maxpri = -1; 432 } 433 IFQ_UNLOCK(cl->cl_pif->pif_ifq); 434 splx(s); 435 436 if (cl->cl_red != NULL) { 437#ifdef ALTQ_RIO 438 if (q_is_rio(cl->cl_q)) 439 rio_destroy((rio_t *)cl->cl_red); 440#endif 441#ifdef ALTQ_RED 442 if (q_is_red(cl->cl_q)) 443 red_destroy(cl->cl_red); 444#endif 445 } 446 free(cl->cl_q, M_DEVBUF); 447 free(cl, M_DEVBUF); 448 return (0); 449} 450 451/* 452 * priq_enqueue is an enqueue function to be registered to 453 * (*altq_enqueue) in struct ifaltq. 454 */ 455static int 456priq_enqueue(struct ifaltq *ifq, struct mbuf *m, struct altq_pktattr *pktattr) 457{ 458 struct priq_if *pif = (struct priq_if *)ifq->altq_disc; 459 struct priq_class *cl; 460 struct pf_mtag *t; 461 int len; 462 463 IFQ_LOCK_ASSERT(ifq); 464 465 /* grab class set by classifier */ 466 if ((m->m_flags & M_PKTHDR) == 0) { 467 /* should not happen */ 468 printf("altq: packet for %s does not have pkthdr\n", 469 ifq->altq_ifp->if_xname); 470 m_freem(m); 471 return (ENOBUFS); 472 } 473 cl = NULL; 474 if ((t = pf_find_mtag(m)) != NULL) 475 cl = clh_to_clp(pif, t->qid); 476#ifdef ALTQ3_COMPAT 477 else if ((ifq->altq_flags & ALTQF_CLASSIFY) && pktattr != NULL) 478 cl = pktattr->pattr_class; 479#endif 480 if (cl == NULL) { 481 cl = pif->pif_default; 482 if (cl == NULL) { 483 m_freem(m); 484 return (ENOBUFS); 485 } 486 } 487#ifdef ALTQ3_COMPAT 488 if (pktattr != NULL) 489 cl->cl_pktattr = pktattr; /* save proto hdr used by ECN */ 490 else 491#endif 492 cl->cl_pktattr = NULL; 493 len = m_pktlen(m); 494 if (priq_addq(cl, m) != 0) { 495 /* drop occurred. mbuf was freed in priq_addq. */ 496 PKTCNTR_ADD(&cl->cl_dropcnt, len); 497 return (ENOBUFS); 498 } 499 IFQ_INC_LEN(ifq); 500 501 /* successfully queued. */ 502 return (0); 503} 504 505/* 506 * priq_dequeue is a dequeue function to be registered to 507 * (*altq_dequeue) in struct ifaltq. 508 * 509 * note: ALTDQ_POLL returns the next packet without removing the packet 510 * from the queue. ALTDQ_REMOVE is a normal dequeue operation. 511 * ALTDQ_REMOVE must return the same packet if called immediately 512 * after ALTDQ_POLL. 513 */ 514static struct mbuf * 515priq_dequeue(struct ifaltq *ifq, int op) 516{ 517 struct priq_if *pif = (struct priq_if *)ifq->altq_disc; 518 struct priq_class *cl; 519 struct mbuf *m; 520 int pri; 521 522 IFQ_LOCK_ASSERT(ifq); 523 524 if (IFQ_IS_EMPTY(ifq)) 525 /* no packet in the queue */ 526 return (NULL); 527 528 for (pri = pif->pif_maxpri; pri >= 0; pri--) { 529 if ((cl = pif->pif_classes[pri]) != NULL && 530 !qempty(cl->cl_q)) { 531 if (op == ALTDQ_POLL) 532 return (priq_pollq(cl)); 533 534 m = priq_getq(cl); 535 if (m != NULL) { 536 IFQ_DEC_LEN(ifq); 537 if (qempty(cl->cl_q)) 538 cl->cl_period++; 539 PKTCNTR_ADD(&cl->cl_xmitcnt, m_pktlen(m)); 540 } 541 return (m); 542 } 543 } 544 return (NULL); 545} 546 547static int 548priq_addq(struct priq_class *cl, struct mbuf *m) 549{ 550 551#ifdef ALTQ_RIO 552 if (q_is_rio(cl->cl_q)) 553 return rio_addq((rio_t *)cl->cl_red, cl->cl_q, m, 554 cl->cl_pktattr); 555#endif 556#ifdef ALTQ_RED 557 if (q_is_red(cl->cl_q)) 558 return red_addq(cl->cl_red, cl->cl_q, m, cl->cl_pktattr); 559#endif 560 if (qlen(cl->cl_q) >= qlimit(cl->cl_q)) { 561 m_freem(m); 562 return (-1); 563 } 564 565 if (cl->cl_flags & PRCF_CLEARDSCP) 566 write_dsfield(m, cl->cl_pktattr, 0); 567 568 _addq(cl->cl_q, m); 569 570 return (0); 571} 572 573static struct mbuf * 574priq_getq(struct priq_class *cl) 575{ 576#ifdef ALTQ_RIO 577 if (q_is_rio(cl->cl_q)) 578 return rio_getq((rio_t *)cl->cl_red, cl->cl_q); 579#endif 580#ifdef ALTQ_RED 581 if (q_is_red(cl->cl_q)) 582 return red_getq(cl->cl_red, cl->cl_q); 583#endif 584 return _getq(cl->cl_q); 585} 586 587static struct mbuf * 588priq_pollq(cl) 589 struct priq_class *cl; 590{ 591 return qhead(cl->cl_q); 592} 593 594static void 595priq_purgeq(struct priq_class *cl) 596{ 597 struct mbuf *m; 598 599 if (qempty(cl->cl_q)) 600 return; 601 602 while ((m = _getq(cl->cl_q)) != NULL) { 603 PKTCNTR_ADD(&cl->cl_dropcnt, m_pktlen(m)); 604 m_freem(m); 605 } 606 ASSERT(qlen(cl->cl_q) == 0); 607} 608 609static void 610get_class_stats(struct priq_classstats *sp, struct priq_class *cl) 611{ 612 sp->class_handle = cl->cl_handle; 613 sp->qlength = qlen(cl->cl_q); 614 sp->qlimit = qlimit(cl->cl_q); 615 sp->period = cl->cl_period; 616 sp->xmitcnt = cl->cl_xmitcnt; 617 sp->dropcnt = cl->cl_dropcnt; 618 619 sp->qtype = qtype(cl->cl_q); 620#ifdef ALTQ_RED 621 if (q_is_red(cl->cl_q)) 622 red_getstats(cl->cl_red, &sp->red[0]); 623#endif 624#ifdef ALTQ_RIO 625 if (q_is_rio(cl->cl_q)) 626 rio_getstats((rio_t *)cl->cl_red, &sp->red[0]); 627#endif 628 629} 630 631/* convert a class handle to the corresponding class pointer */ 632static struct priq_class * 633clh_to_clp(struct priq_if *pif, u_int32_t chandle) 634{ 635 struct priq_class *cl; 636 int idx; 637 638 if (chandle == 0) 639 return (NULL); 640 641 for (idx = pif->pif_maxpri; idx >= 0; idx--) 642 if ((cl = pif->pif_classes[idx]) != NULL && 643 cl->cl_handle == chandle) 644 return (cl); 645 646 return (NULL); 647} 648 649 650#ifdef ALTQ3_COMPAT 651 652static struct priq_if * 653priq_attach(ifq, bandwidth) 654 struct ifaltq *ifq; 655 u_int bandwidth; 656{ 657 struct priq_if *pif; 658 659 pif = malloc(sizeof(struct priq_if), 660 M_DEVBUF, M_WAITOK); 661 if (pif == NULL) 662 return (NULL); 663 bzero(pif, sizeof(struct priq_if)); 664 pif->pif_bandwidth = bandwidth; 665 pif->pif_maxpri = -1; 666 pif->pif_ifq = ifq; 667 668 /* add this state to the priq list */ 669 pif->pif_next = pif_list; 670 pif_list = pif; 671 672 return (pif); 673} 674 675static int 676priq_detach(pif) 677 struct priq_if *pif; 678{ 679 (void)priq_clear_interface(pif); 680 681 /* remove this interface from the pif list */ 682 if (pif_list == pif) 683 pif_list = pif->pif_next; 684 else { 685 struct priq_if *p; 686 687 for (p = pif_list; p != NULL; p = p->pif_next) 688 if (p->pif_next == pif) { 689 p->pif_next = pif->pif_next; 690 break; 691 } 692 ASSERT(p != NULL); 693 } 694 695 free(pif, M_DEVBUF); 696 return (0); 697} 698 699/* 700 * priq device interface 701 */ 702int 703priqopen(dev, flag, fmt, p) 704 dev_t dev; 705 int flag, fmt; 706#if (__FreeBSD_version > 500000) 707 struct thread *p; 708#else 709 struct proc *p; 710#endif 711{ 712 /* everything will be done when the queueing scheme is attached. */ 713 return 0; 714} 715 716int 717priqclose(dev, flag, fmt, p) 718 dev_t dev; 719 int flag, fmt; 720#if (__FreeBSD_version > 500000) 721 struct thread *p; 722#else 723 struct proc *p; 724#endif 725{ 726 struct priq_if *pif; 727 int err, error = 0; 728 729 while ((pif = pif_list) != NULL) { 730 /* destroy all */ 731 if (ALTQ_IS_ENABLED(pif->pif_ifq)) 732 altq_disable(pif->pif_ifq); 733 734 err = altq_detach(pif->pif_ifq); 735 if (err == 0) 736 err = priq_detach(pif); 737 if (err != 0 && error == 0) 738 error = err; 739 } 740 741 return error; 742} 743 744int 745priqioctl(dev, cmd, addr, flag, p) 746 dev_t dev; 747 ioctlcmd_t cmd; 748 caddr_t addr; 749 int flag; 750#if (__FreeBSD_version > 500000) 751 struct thread *p; 752#else 753 struct proc *p; 754#endif 755{ 756 struct priq_if *pif; 757 struct priq_interface *ifacep; 758 int error = 0; 759 760 /* check super-user privilege */ 761 switch (cmd) { 762 case PRIQ_GETSTATS: 763 break; 764 default: 765#if (__FreeBSD_version > 700000) 766 if ((error = priv_check(p, PRIV_ALTQ_MANAGE)) != 0) 767 return (error); 768#elsif (__FreeBSD_version > 400000) 769 if ((error = suser(p)) != 0) 770 return (error); 771#else 772 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 773 return (error); 774#endif 775 break; 776 } 777 778 switch (cmd) { 779 780 case PRIQ_IF_ATTACH: 781 error = priqcmd_if_attach((struct priq_interface *)addr); 782 break; 783 784 case PRIQ_IF_DETACH: 785 error = priqcmd_if_detach((struct priq_interface *)addr); 786 break; 787 788 case PRIQ_ENABLE: 789 case PRIQ_DISABLE: 790 case PRIQ_CLEAR: 791 ifacep = (struct priq_interface *)addr; 792 if ((pif = altq_lookup(ifacep->ifname, 793 ALTQT_PRIQ)) == NULL) { 794 error = EBADF; 795 break; 796 } 797 798 switch (cmd) { 799 case PRIQ_ENABLE: 800 if (pif->pif_default == NULL) { 801#ifdef ALTQ_DEBUG 802 printf("priq: no default class\n"); 803#endif 804 error = EINVAL; 805 break; 806 } 807 error = altq_enable(pif->pif_ifq); 808 break; 809 810 case PRIQ_DISABLE: 811 error = altq_disable(pif->pif_ifq); 812 break; 813 814 case PRIQ_CLEAR: 815 priq_clear_interface(pif); 816 break; 817 } 818 break; 819 820 case PRIQ_ADD_CLASS: 821 error = priqcmd_add_class((struct priq_add_class *)addr); 822 break; 823 824 case PRIQ_DEL_CLASS: 825 error = priqcmd_delete_class((struct priq_delete_class *)addr); 826 break; 827 828 case PRIQ_MOD_CLASS: 829 error = priqcmd_modify_class((struct priq_modify_class *)addr); 830 break; 831 832 case PRIQ_ADD_FILTER: 833 error = priqcmd_add_filter((struct priq_add_filter *)addr); 834 break; 835 836 case PRIQ_DEL_FILTER: 837 error = priqcmd_delete_filter((struct priq_delete_filter *)addr); 838 break; 839 840 case PRIQ_GETSTATS: 841 error = priqcmd_class_stats((struct priq_class_stats *)addr); 842 break; 843 844 default: 845 error = EINVAL; 846 break; 847 } 848 return error; 849} 850 851static int 852priqcmd_if_attach(ap) 853 struct priq_interface *ap; 854{ 855 struct priq_if *pif; 856 struct ifnet *ifp; 857 int error; 858 859 if ((ifp = ifunit(ap->ifname)) == NULL) 860 return (ENXIO); 861 862 if ((pif = priq_attach(&ifp->if_snd, ap->arg)) == NULL) 863 return (ENOMEM); 864 865 /* 866 * set PRIQ to this ifnet structure. 867 */ 868 if ((error = altq_attach(&ifp->if_snd, ALTQT_PRIQ, pif, 869 priq_enqueue, priq_dequeue, priq_request, 870 &pif->pif_classifier, acc_classify)) != 0) 871 (void)priq_detach(pif); 872 873 return (error); 874} 875 876static int 877priqcmd_if_detach(ap) 878 struct priq_interface *ap; 879{ 880 struct priq_if *pif; 881 int error; 882 883 if ((pif = altq_lookup(ap->ifname, ALTQT_PRIQ)) == NULL) 884 return (EBADF); 885 886 if (ALTQ_IS_ENABLED(pif->pif_ifq)) 887 altq_disable(pif->pif_ifq); 888 889 if ((error = altq_detach(pif->pif_ifq))) 890 return (error); 891 892 return priq_detach(pif); 893} 894 895static int 896priqcmd_add_class(ap) 897 struct priq_add_class *ap; 898{ 899 struct priq_if *pif; 900 struct priq_class *cl; 901 int qid; 902 903 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 904 return (EBADF); 905 906 if (ap->pri < 0 || ap->pri >= PRIQ_MAXPRI) 907 return (EINVAL); 908 if (pif->pif_classes[ap->pri] != NULL) 909 return (EBUSY); 910 911 qid = ap->pri + 1; 912 if ((cl = priq_class_create(pif, ap->pri, 913 ap->qlimit, ap->flags, qid)) == NULL) 914 return (ENOMEM); 915 916 /* return a class handle to the user */ 917 ap->class_handle = cl->cl_handle; 918 919 return (0); 920} 921 922static int 923priqcmd_delete_class(ap) 924 struct priq_delete_class *ap; 925{ 926 struct priq_if *pif; 927 struct priq_class *cl; 928 929 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 930 return (EBADF); 931 932 if ((cl = clh_to_clp(pif, ap->class_handle)) == NULL) 933 return (EINVAL); 934 935 return priq_class_destroy(cl); 936} 937 938static int 939priqcmd_modify_class(ap) 940 struct priq_modify_class *ap; 941{ 942 struct priq_if *pif; 943 struct priq_class *cl; 944 945 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 946 return (EBADF); 947 948 if (ap->pri < 0 || ap->pri >= PRIQ_MAXPRI) 949 return (EINVAL); 950 951 if ((cl = clh_to_clp(pif, ap->class_handle)) == NULL) 952 return (EINVAL); 953 954 /* 955 * if priority is changed, move the class to the new priority 956 */ 957 if (pif->pif_classes[ap->pri] != cl) { 958 if (pif->pif_classes[ap->pri] != NULL) 959 return (EEXIST); 960 pif->pif_classes[cl->cl_pri] = NULL; 961 pif->pif_classes[ap->pri] = cl; 962 cl->cl_pri = ap->pri; 963 } 964 965 /* call priq_class_create to change class parameters */ 966 if ((cl = priq_class_create(pif, ap->pri, 967 ap->qlimit, ap->flags, ap->class_handle)) == NULL) 968 return (ENOMEM); 969 return 0; 970} 971 972static int 973priqcmd_add_filter(ap) 974 struct priq_add_filter *ap; 975{ 976 struct priq_if *pif; 977 struct priq_class *cl; 978 979 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 980 return (EBADF); 981 982 if ((cl = clh_to_clp(pif, ap->class_handle)) == NULL) 983 return (EINVAL); 984 985 return acc_add_filter(&pif->pif_classifier, &ap->filter, 986 cl, &ap->filter_handle); 987} 988 989static int 990priqcmd_delete_filter(ap) 991 struct priq_delete_filter *ap; 992{ 993 struct priq_if *pif; 994 995 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 996 return (EBADF); 997 998 return acc_delete_filter(&pif->pif_classifier, 999 ap->filter_handle); 1000} 1001 1002static int 1003priqcmd_class_stats(ap) 1004 struct priq_class_stats *ap; 1005{ 1006 struct priq_if *pif; 1007 struct priq_class *cl; 1008 struct priq_classstats stats, *usp; 1009 int pri, error; 1010 1011 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 1012 return (EBADF); 1013 1014 ap->maxpri = pif->pif_maxpri; 1015 1016 /* then, read the next N classes in the tree */ 1017 usp = ap->stats; 1018 for (pri = 0; pri <= pif->pif_maxpri; pri++) { 1019 cl = pif->pif_classes[pri]; 1020 if (cl != NULL) 1021 get_class_stats(&stats, cl); 1022 else 1023 bzero(&stats, sizeof(stats)); 1024 if ((error = copyout((caddr_t)&stats, (caddr_t)usp++, 1025 sizeof(stats))) != 0) 1026 return (error); 1027 } 1028 return (0); 1029} 1030 1031#ifdef KLD_MODULE 1032 1033static struct altqsw priq_sw = 1034 {"priq", priqopen, priqclose, priqioctl}; 1035 1036ALTQ_MODULE(altq_priq, ALTQT_PRIQ, &priq_sw); 1037MODULE_DEPEND(altq_priq, altq_red, 1, 1, 1); 1038MODULE_DEPEND(altq_priq, altq_rio, 1, 1, 1); 1039 1040#endif /* KLD_MODULE */ 1041 1042#endif /* ALTQ3_COMPAT */ 1043#endif /* ALTQ_PRIQ */ 1044