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), 136 M_DEVBUF, M_WAITOK); 137 if (pif == NULL) 138 return (ENOMEM); 139 bzero(pif, sizeof(struct priq_if)); 140 pif->pif_bandwidth = a->ifbandwidth; 141 pif->pif_maxpri = -1; 142 pif->pif_ifq = &ifp->if_snd; 143 144 /* keep the state in pf_altq */ 145 a->altq_disc = pif; 146 147 return (0); 148} 149 150int 151priq_remove_altq(struct pf_altq *a) 152{ 153 struct priq_if *pif; 154 155 if ((pif = a->altq_disc) == NULL) 156 return (EINVAL); 157 a->altq_disc = NULL; 158 159 (void)priq_clear_interface(pif); 160 161 free(pif, M_DEVBUF); 162 return (0); 163} 164 165int 166priq_add_queue(struct pf_altq *a) 167{ 168 struct priq_if *pif; 169 struct priq_class *cl; 170 171 if ((pif = a->altq_disc) == NULL) 172 return (EINVAL); 173 174 /* check parameters */ 175 if (a->priority >= PRIQ_MAXPRI) 176 return (EINVAL); 177 if (a->qid == 0) 178 return (EINVAL); 179 if (pif->pif_classes[a->priority] != NULL) 180 return (EBUSY); 181 if (clh_to_clp(pif, a->qid) != NULL) 182 return (EBUSY); 183 184 cl = priq_class_create(pif, a->priority, a->qlimit, 185 a->pq_u.priq_opts.flags, a->qid); 186 if (cl == NULL) 187 return (ENOMEM); 188 189 return (0); 190} 191 192int 193priq_remove_queue(struct pf_altq *a) 194{ 195 struct priq_if *pif; 196 struct priq_class *cl; 197 198 if ((pif = a->altq_disc) == NULL) 199 return (EINVAL); 200 201 if ((cl = clh_to_clp(pif, a->qid)) == NULL) 202 return (EINVAL); 203 204 return (priq_class_destroy(cl)); 205} 206 207int 208priq_getqstats(struct pf_altq *a, void *ubuf, int *nbytes) 209{ 210 struct priq_if *pif; 211 struct priq_class *cl; 212 struct priq_classstats stats; 213 int error = 0; 214 215 if ((pif = altq_lookup(a->ifname, ALTQT_PRIQ)) == NULL) 216 return (EBADF); 217 218 if ((cl = clh_to_clp(pif, a->qid)) == NULL) 219 return (EINVAL); 220 221 if (*nbytes < sizeof(stats)) 222 return (EINVAL); 223 224 get_class_stats(&stats, cl); 225 226 if ((error = copyout((caddr_t)&stats, ubuf, sizeof(stats))) != 0) 227 return (error); 228 *nbytes = sizeof(stats); 229 return (0); 230} 231 232/* 233 * bring the interface back to the initial state by discarding 234 * all the filters and classes. 235 */ 236static int 237priq_clear_interface(struct priq_if *pif) 238{ 239 struct priq_class *cl; 240 int pri; 241 242#ifdef ALTQ3_CLFIER_COMPAT 243 /* free the filters for this interface */ 244 acc_discard_filters(&pif->pif_classifier, NULL, 1); 245#endif 246 247 /* clear out the classes */ 248 for (pri = 0; pri <= pif->pif_maxpri; pri++) 249 if ((cl = pif->pif_classes[pri]) != NULL) 250 priq_class_destroy(cl); 251 252 return (0); 253} 254 255static int 256priq_request(struct ifaltq *ifq, int req, void *arg) 257{ 258 struct priq_if *pif = (struct priq_if *)ifq->altq_disc; 259 260 IFQ_LOCK_ASSERT(ifq); 261 262 switch (req) { 263 case ALTRQ_PURGE: 264 priq_purge(pif); 265 break; 266 } 267 return (0); 268} 269 270/* discard all the queued packets on the interface */ 271static void 272priq_purge(struct priq_if *pif) 273{ 274 struct priq_class *cl; 275 int pri; 276 277 for (pri = 0; pri <= pif->pif_maxpri; pri++) { 278 if ((cl = pif->pif_classes[pri]) != NULL && !qempty(cl->cl_q)) 279 priq_purgeq(cl); 280 } 281 if (ALTQ_IS_ENABLED(pif->pif_ifq)) 282 pif->pif_ifq->ifq_len = 0; 283} 284 285static struct priq_class * 286priq_class_create(struct priq_if *pif, int pri, int qlimit, int flags, int qid) 287{ 288 struct priq_class *cl; 289 int s; 290 291#ifndef ALTQ_RED 292 if (flags & PRCF_RED) { 293#ifdef ALTQ_DEBUG 294 printf("priq_class_create: RED not configured for PRIQ!\n"); 295#endif 296 return (NULL); 297 } 298#endif 299 300 if ((cl = pif->pif_classes[pri]) != NULL) { 301 /* modify the class instead of creating a new one */ 302#ifdef __NetBSD__ 303 s = splnet(); 304#else 305 s = splimp(); 306#endif 307 IFQ_LOCK(cl->cl_pif->pif_ifq); 308 if (!qempty(cl->cl_q)) 309 priq_purgeq(cl); 310 IFQ_UNLOCK(cl->cl_pif->pif_ifq); 311 splx(s); 312#ifdef ALTQ_RIO 313 if (q_is_rio(cl->cl_q)) 314 rio_destroy((rio_t *)cl->cl_red); 315#endif 316#ifdef ALTQ_RED 317 if (q_is_red(cl->cl_q)) 318 red_destroy(cl->cl_red); 319#endif 320 } else { 321 cl = malloc(sizeof(struct priq_class), 322 M_DEVBUF, M_WAITOK); 323 if (cl == NULL) 324 return (NULL); 325 bzero(cl, sizeof(struct priq_class)); 326 327 cl->cl_q = malloc(sizeof(class_queue_t), 328 M_DEVBUF, M_WAITOK); 329 if (cl->cl_q == NULL) 330 goto err_ret; 331 bzero(cl->cl_q, sizeof(class_queue_t)); 332 } 333 334 pif->pif_classes[pri] = cl; 335 if (flags & PRCF_DEFAULTCLASS) 336 pif->pif_default = cl; 337 if (qlimit == 0) 338 qlimit = 50; /* use default */ 339 qlimit(cl->cl_q) = qlimit; 340 qtype(cl->cl_q) = Q_DROPTAIL; 341 qlen(cl->cl_q) = 0; 342 cl->cl_flags = flags; 343 cl->cl_pri = pri; 344 if (pri > pif->pif_maxpri) 345 pif->pif_maxpri = pri; 346 cl->cl_pif = pif; 347 cl->cl_handle = qid; 348 349#ifdef ALTQ_RED 350 if (flags & (PRCF_RED|PRCF_RIO)) { 351 int red_flags, red_pkttime; 352 353 red_flags = 0; 354 if (flags & PRCF_ECN) 355 red_flags |= REDF_ECN; 356#ifdef ALTQ_RIO 357 if (flags & PRCF_CLEARDSCP) 358 red_flags |= RIOF_CLEARDSCP; 359#endif 360 if (pif->pif_bandwidth < 8) 361 red_pkttime = 1000 * 1000 * 1000; /* 1 sec */ 362 else 363 red_pkttime = (int64_t)pif->pif_ifq->altq_ifp->if_mtu 364 * 1000 * 1000 * 1000 / (pif->pif_bandwidth / 8); 365#ifdef ALTQ_RIO 366 if (flags & PRCF_RIO) { 367 cl->cl_red = (red_t *)rio_alloc(0, NULL, 368 red_flags, red_pkttime); 369 if (cl->cl_red != NULL) 370 qtype(cl->cl_q) = Q_RIO; 371 } else 372#endif 373 if (flags & PRCF_RED) { 374 cl->cl_red = red_alloc(0, 0, 375 qlimit(cl->cl_q) * 10/100, 376 qlimit(cl->cl_q) * 30/100, 377 red_flags, red_pkttime); 378 if (cl->cl_red != NULL) 379 qtype(cl->cl_q) = Q_RED; 380 } 381 } 382#endif /* ALTQ_RED */ 383 384 return (cl); 385 386 err_ret: 387 if (cl->cl_red != NULL) { 388#ifdef ALTQ_RIO 389 if (q_is_rio(cl->cl_q)) 390 rio_destroy((rio_t *)cl->cl_red); 391#endif 392#ifdef ALTQ_RED 393 if (q_is_red(cl->cl_q)) 394 red_destroy(cl->cl_red); 395#endif 396 } 397 if (cl->cl_q != NULL) 398 free(cl->cl_q, M_DEVBUF); 399 free(cl, M_DEVBUF); 400 return (NULL); 401} 402 403static int 404priq_class_destroy(struct priq_class *cl) 405{ 406 struct priq_if *pif; 407 int s, pri; 408 409#ifdef __NetBSD__ 410 s = splnet(); 411#else 412 s = splimp(); 413#endif 414 IFQ_LOCK(cl->cl_pif->pif_ifq); 415 416#ifdef ALTQ3_CLFIER_COMPAT 417 /* delete filters referencing to this class */ 418 acc_discard_filters(&cl->cl_pif->pif_classifier, cl, 0); 419#endif 420 421 if (!qempty(cl->cl_q)) 422 priq_purgeq(cl); 423 424 pif = cl->cl_pif; 425 pif->pif_classes[cl->cl_pri] = NULL; 426 if (pif->pif_maxpri == cl->cl_pri) { 427 for (pri = cl->cl_pri; pri >= 0; pri--) 428 if (pif->pif_classes[pri] != NULL) { 429 pif->pif_maxpri = pri; 430 break; 431 } 432 if (pri < 0) 433 pif->pif_maxpri = -1; 434 } 435 IFQ_UNLOCK(cl->cl_pif->pif_ifq); 436 splx(s); 437 438 if (cl->cl_red != NULL) { 439#ifdef ALTQ_RIO 440 if (q_is_rio(cl->cl_q)) 441 rio_destroy((rio_t *)cl->cl_red); 442#endif 443#ifdef ALTQ_RED 444 if (q_is_red(cl->cl_q)) 445 red_destroy(cl->cl_red); 446#endif 447 } 448 free(cl->cl_q, M_DEVBUF); 449 free(cl, M_DEVBUF); 450 return (0); 451} 452 453/* 454 * priq_enqueue is an enqueue function to be registered to 455 * (*altq_enqueue) in struct ifaltq. 456 */ 457static int 458priq_enqueue(struct ifaltq *ifq, struct mbuf *m, struct altq_pktattr *pktattr) 459{ 460 struct priq_if *pif = (struct priq_if *)ifq->altq_disc; 461 struct priq_class *cl; 462 struct pf_mtag *t; 463 int len; 464 465 IFQ_LOCK_ASSERT(ifq); 466 467 /* grab class set by classifier */ 468 if ((m->m_flags & M_PKTHDR) == 0) { 469 /* should not happen */ 470 printf("altq: packet for %s does not have pkthdr\n", 471 ifq->altq_ifp->if_xname); 472 m_freem(m); 473 return (ENOBUFS); 474 } 475 cl = NULL; 476 if ((t = pf_find_mtag(m)) != NULL) 477 cl = clh_to_clp(pif, t->qid); 478#ifdef ALTQ3_COMPAT 479 else if ((ifq->altq_flags & ALTQF_CLASSIFY) && pktattr != NULL) 480 cl = pktattr->pattr_class; 481#endif 482 if (cl == NULL) { 483 cl = pif->pif_default; 484 if (cl == NULL) { 485 m_freem(m); 486 return (ENOBUFS); 487 } 488 } 489#ifdef ALTQ3_COMPAT 490 if (pktattr != NULL) 491 cl->cl_pktattr = pktattr; /* save proto hdr used by ECN */ 492 else 493#endif 494 cl->cl_pktattr = NULL; 495 len = m_pktlen(m); 496 if (priq_addq(cl, m) != 0) { 497 /* drop occurred. mbuf was freed in priq_addq. */ 498 PKTCNTR_ADD(&cl->cl_dropcnt, len); 499 return (ENOBUFS); 500 } 501 IFQ_INC_LEN(ifq); 502 503 /* successfully queued. */ 504 return (0); 505} 506 507/* 508 * priq_dequeue is a dequeue function to be registered to 509 * (*altq_dequeue) in struct ifaltq. 510 * 511 * note: ALTDQ_POLL returns the next packet without removing the packet 512 * from the queue. ALTDQ_REMOVE is a normal dequeue operation. 513 * ALTDQ_REMOVE must return the same packet if called immediately 514 * after ALTDQ_POLL. 515 */ 516static struct mbuf * 517priq_dequeue(struct ifaltq *ifq, int op) 518{ 519 struct priq_if *pif = (struct priq_if *)ifq->altq_disc; 520 struct priq_class *cl; 521 struct mbuf *m; 522 int pri; 523 524 IFQ_LOCK_ASSERT(ifq); 525 526 if (IFQ_IS_EMPTY(ifq)) 527 /* no packet in the queue */ 528 return (NULL); 529 530 for (pri = pif->pif_maxpri; pri >= 0; pri--) { 531 if ((cl = pif->pif_classes[pri]) != NULL && 532 !qempty(cl->cl_q)) { 533 if (op == ALTDQ_POLL) 534 return (priq_pollq(cl)); 535 536 m = priq_getq(cl); 537 if (m != NULL) { 538 IFQ_DEC_LEN(ifq); 539 if (qempty(cl->cl_q)) 540 cl->cl_period++; 541 PKTCNTR_ADD(&cl->cl_xmitcnt, m_pktlen(m)); 542 } 543 return (m); 544 } 545 } 546 return (NULL); 547} 548 549static int 550priq_addq(struct priq_class *cl, struct mbuf *m) 551{ 552 553#ifdef ALTQ_RIO 554 if (q_is_rio(cl->cl_q)) 555 return rio_addq((rio_t *)cl->cl_red, cl->cl_q, m, 556 cl->cl_pktattr); 557#endif 558#ifdef ALTQ_RED 559 if (q_is_red(cl->cl_q)) 560 return red_addq(cl->cl_red, cl->cl_q, m, cl->cl_pktattr); 561#endif 562 if (qlen(cl->cl_q) >= qlimit(cl->cl_q)) { 563 m_freem(m); 564 return (-1); 565 } 566 567 if (cl->cl_flags & PRCF_CLEARDSCP) 568 write_dsfield(m, cl->cl_pktattr, 0); 569 570 _addq(cl->cl_q, m); 571 572 return (0); 573} 574 575static struct mbuf * 576priq_getq(struct priq_class *cl) 577{ 578#ifdef ALTQ_RIO 579 if (q_is_rio(cl->cl_q)) 580 return rio_getq((rio_t *)cl->cl_red, cl->cl_q); 581#endif 582#ifdef ALTQ_RED 583 if (q_is_red(cl->cl_q)) 584 return red_getq(cl->cl_red, cl->cl_q); 585#endif 586 return _getq(cl->cl_q); 587} 588 589static struct mbuf * 590priq_pollq(cl) 591 struct priq_class *cl; 592{ 593 return qhead(cl->cl_q); 594} 595 596static void 597priq_purgeq(struct priq_class *cl) 598{ 599 struct mbuf *m; 600 601 if (qempty(cl->cl_q)) 602 return; 603 604 while ((m = _getq(cl->cl_q)) != NULL) { 605 PKTCNTR_ADD(&cl->cl_dropcnt, m_pktlen(m)); 606 m_freem(m); 607 } 608 ASSERT(qlen(cl->cl_q) == 0); 609} 610 611static void 612get_class_stats(struct priq_classstats *sp, struct priq_class *cl) 613{ 614 sp->class_handle = cl->cl_handle; 615 sp->qlength = qlen(cl->cl_q); 616 sp->qlimit = qlimit(cl->cl_q); 617 sp->period = cl->cl_period; 618 sp->xmitcnt = cl->cl_xmitcnt; 619 sp->dropcnt = cl->cl_dropcnt; 620 621 sp->qtype = qtype(cl->cl_q); 622#ifdef ALTQ_RED 623 if (q_is_red(cl->cl_q)) 624 red_getstats(cl->cl_red, &sp->red[0]); 625#endif 626#ifdef ALTQ_RIO 627 if (q_is_rio(cl->cl_q)) 628 rio_getstats((rio_t *)cl->cl_red, &sp->red[0]); 629#endif 630 631} 632 633/* convert a class handle to the corresponding class pointer */ 634static struct priq_class * 635clh_to_clp(struct priq_if *pif, u_int32_t chandle) 636{ 637 struct priq_class *cl; 638 int idx; 639 640 if (chandle == 0) 641 return (NULL); 642 643 for (idx = pif->pif_maxpri; idx >= 0; idx--) 644 if ((cl = pif->pif_classes[idx]) != NULL && 645 cl->cl_handle == chandle) 646 return (cl); 647 648 return (NULL); 649} 650 651 652#ifdef ALTQ3_COMPAT 653 654static struct priq_if * 655priq_attach(ifq, bandwidth) 656 struct ifaltq *ifq; 657 u_int bandwidth; 658{ 659 struct priq_if *pif; 660 661 pif = malloc(sizeof(struct priq_if), 662 M_DEVBUF, M_WAITOK); 663 if (pif == NULL) 664 return (NULL); 665 bzero(pif, sizeof(struct priq_if)); 666 pif->pif_bandwidth = bandwidth; 667 pif->pif_maxpri = -1; 668 pif->pif_ifq = ifq; 669 670 /* add this state to the priq list */ 671 pif->pif_next = pif_list; 672 pif_list = pif; 673 674 return (pif); 675} 676 677static int 678priq_detach(pif) 679 struct priq_if *pif; 680{ 681 (void)priq_clear_interface(pif); 682 683 /* remove this interface from the pif list */ 684 if (pif_list == pif) 685 pif_list = pif->pif_next; 686 else { 687 struct priq_if *p; 688 689 for (p = pif_list; p != NULL; p = p->pif_next) 690 if (p->pif_next == pif) { 691 p->pif_next = pif->pif_next; 692 break; 693 } 694 ASSERT(p != NULL); 695 } 696 697 free(pif, M_DEVBUF); 698 return (0); 699} 700 701/* 702 * priq device interface 703 */ 704int 705priqopen(dev, flag, fmt, p) 706 dev_t dev; 707 int flag, fmt; 708#if (__FreeBSD_version > 500000) 709 struct thread *p; 710#else 711 struct proc *p; 712#endif 713{ 714 /* everything will be done when the queueing scheme is attached. */ 715 return 0; 716} 717 718int 719priqclose(dev, flag, fmt, p) 720 dev_t dev; 721 int flag, fmt; 722#if (__FreeBSD_version > 500000) 723 struct thread *p; 724#else 725 struct proc *p; 726#endif 727{ 728 struct priq_if *pif; 729 int err, error = 0; 730 731 while ((pif = pif_list) != NULL) { 732 /* destroy all */ 733 if (ALTQ_IS_ENABLED(pif->pif_ifq)) 734 altq_disable(pif->pif_ifq); 735 736 err = altq_detach(pif->pif_ifq); 737 if (err == 0) 738 err = priq_detach(pif); 739 if (err != 0 && error == 0) 740 error = err; 741 } 742 743 return error; 744} 745 746int 747priqioctl(dev, cmd, addr, flag, p) 748 dev_t dev; 749 ioctlcmd_t cmd; 750 caddr_t addr; 751 int flag; 752#if (__FreeBSD_version > 500000) 753 struct thread *p; 754#else 755 struct proc *p; 756#endif 757{ 758 struct priq_if *pif; 759 struct priq_interface *ifacep; 760 int error = 0; 761 762 /* check super-user privilege */ 763 switch (cmd) { 764 case PRIQ_GETSTATS: 765 break; 766 default: 767#if (__FreeBSD_version > 700000) 768 if ((error = priv_check(p, PRIV_ALTQ_MANAGE)) != 0) 769 return (error); 770#elsif (__FreeBSD_version > 400000) 771 if ((error = suser(p)) != 0) 772 return (error); 773#else 774 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 775 return (error); 776#endif 777 break; 778 } 779 780 switch (cmd) { 781 782 case PRIQ_IF_ATTACH: 783 error = priqcmd_if_attach((struct priq_interface *)addr); 784 break; 785 786 case PRIQ_IF_DETACH: 787 error = priqcmd_if_detach((struct priq_interface *)addr); 788 break; 789 790 case PRIQ_ENABLE: 791 case PRIQ_DISABLE: 792 case PRIQ_CLEAR: 793 ifacep = (struct priq_interface *)addr; 794 if ((pif = altq_lookup(ifacep->ifname, 795 ALTQT_PRIQ)) == NULL) { 796 error = EBADF; 797 break; 798 } 799 800 switch (cmd) { 801 case PRIQ_ENABLE: 802 if (pif->pif_default == NULL) { 803#ifdef ALTQ_DEBUG 804 printf("priq: no default class\n"); 805#endif 806 error = EINVAL; 807 break; 808 } 809 error = altq_enable(pif->pif_ifq); 810 break; 811 812 case PRIQ_DISABLE: 813 error = altq_disable(pif->pif_ifq); 814 break; 815 816 case PRIQ_CLEAR: 817 priq_clear_interface(pif); 818 break; 819 } 820 break; 821 822 case PRIQ_ADD_CLASS: 823 error = priqcmd_add_class((struct priq_add_class *)addr); 824 break; 825 826 case PRIQ_DEL_CLASS: 827 error = priqcmd_delete_class((struct priq_delete_class *)addr); 828 break; 829 830 case PRIQ_MOD_CLASS: 831 error = priqcmd_modify_class((struct priq_modify_class *)addr); 832 break; 833 834 case PRIQ_ADD_FILTER: 835 error = priqcmd_add_filter((struct priq_add_filter *)addr); 836 break; 837 838 case PRIQ_DEL_FILTER: 839 error = priqcmd_delete_filter((struct priq_delete_filter *)addr); 840 break; 841 842 case PRIQ_GETSTATS: 843 error = priqcmd_class_stats((struct priq_class_stats *)addr); 844 break; 845 846 default: 847 error = EINVAL; 848 break; 849 } 850 return error; 851} 852 853static int 854priqcmd_if_attach(ap) 855 struct priq_interface *ap; 856{ 857 struct priq_if *pif; 858 struct ifnet *ifp; 859 int error; 860 861 if ((ifp = ifunit(ap->ifname)) == NULL) 862 return (ENXIO); 863 864 if ((pif = priq_attach(&ifp->if_snd, ap->arg)) == NULL) 865 return (ENOMEM); 866 867 /* 868 * set PRIQ to this ifnet structure. 869 */ 870 if ((error = altq_attach(&ifp->if_snd, ALTQT_PRIQ, pif, 871 priq_enqueue, priq_dequeue, priq_request, 872 &pif->pif_classifier, acc_classify)) != 0) 873 (void)priq_detach(pif); 874 875 return (error); 876} 877 878static int 879priqcmd_if_detach(ap) 880 struct priq_interface *ap; 881{ 882 struct priq_if *pif; 883 int error; 884 885 if ((pif = altq_lookup(ap->ifname, ALTQT_PRIQ)) == NULL) 886 return (EBADF); 887 888 if (ALTQ_IS_ENABLED(pif->pif_ifq)) 889 altq_disable(pif->pif_ifq); 890 891 if ((error = altq_detach(pif->pif_ifq))) 892 return (error); 893 894 return priq_detach(pif); 895} 896 897static int 898priqcmd_add_class(ap) 899 struct priq_add_class *ap; 900{ 901 struct priq_if *pif; 902 struct priq_class *cl; 903 int qid; 904 905 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 906 return (EBADF); 907 908 if (ap->pri < 0 || ap->pri >= PRIQ_MAXPRI) 909 return (EINVAL); 910 if (pif->pif_classes[ap->pri] != NULL) 911 return (EBUSY); 912 913 qid = ap->pri + 1; 914 if ((cl = priq_class_create(pif, ap->pri, 915 ap->qlimit, ap->flags, qid)) == NULL) 916 return (ENOMEM); 917 918 /* return a class handle to the user */ 919 ap->class_handle = cl->cl_handle; 920 921 return (0); 922} 923 924static int 925priqcmd_delete_class(ap) 926 struct priq_delete_class *ap; 927{ 928 struct priq_if *pif; 929 struct priq_class *cl; 930 931 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 932 return (EBADF); 933 934 if ((cl = clh_to_clp(pif, ap->class_handle)) == NULL) 935 return (EINVAL); 936 937 return priq_class_destroy(cl); 938} 939 940static int 941priqcmd_modify_class(ap) 942 struct priq_modify_class *ap; 943{ 944 struct priq_if *pif; 945 struct priq_class *cl; 946 947 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 948 return (EBADF); 949 950 if (ap->pri < 0 || ap->pri >= PRIQ_MAXPRI) 951 return (EINVAL); 952 953 if ((cl = clh_to_clp(pif, ap->class_handle)) == NULL) 954 return (EINVAL); 955 956 /* 957 * if priority is changed, move the class to the new priority 958 */ 959 if (pif->pif_classes[ap->pri] != cl) { 960 if (pif->pif_classes[ap->pri] != NULL) 961 return (EEXIST); 962 pif->pif_classes[cl->cl_pri] = NULL; 963 pif->pif_classes[ap->pri] = cl; 964 cl->cl_pri = ap->pri; 965 } 966 967 /* call priq_class_create to change class parameters */ 968 if ((cl = priq_class_create(pif, ap->pri, 969 ap->qlimit, ap->flags, ap->class_handle)) == NULL) 970 return (ENOMEM); 971 return 0; 972} 973 974static int 975priqcmd_add_filter(ap) 976 struct priq_add_filter *ap; 977{ 978 struct priq_if *pif; 979 struct priq_class *cl; 980 981 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 982 return (EBADF); 983 984 if ((cl = clh_to_clp(pif, ap->class_handle)) == NULL) 985 return (EINVAL); 986 987 return acc_add_filter(&pif->pif_classifier, &ap->filter, 988 cl, &ap->filter_handle); 989} 990 991static int 992priqcmd_delete_filter(ap) 993 struct priq_delete_filter *ap; 994{ 995 struct priq_if *pif; 996 997 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 998 return (EBADF); 999 1000 return acc_delete_filter(&pif->pif_classifier, 1001 ap->filter_handle); 1002} 1003 1004static int 1005priqcmd_class_stats(ap) 1006 struct priq_class_stats *ap; 1007{ 1008 struct priq_if *pif; 1009 struct priq_class *cl; 1010 struct priq_classstats stats, *usp; 1011 int pri, error; 1012 1013 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 1014 return (EBADF); 1015 1016 ap->maxpri = pif->pif_maxpri; 1017 1018 /* then, read the next N classes in the tree */ 1019 usp = ap->stats; 1020 for (pri = 0; pri <= pif->pif_maxpri; pri++) { 1021 cl = pif->pif_classes[pri]; 1022 if (cl != NULL) 1023 get_class_stats(&stats, cl); 1024 else 1025 bzero(&stats, sizeof(stats)); 1026 if ((error = copyout((caddr_t)&stats, (caddr_t)usp++, 1027 sizeof(stats))) != 0) 1028 return (error); 1029 } 1030 return (0); 1031} 1032 1033#ifdef KLD_MODULE 1034 1035static struct altqsw priq_sw = 1036 {"priq", priqopen, priqclose, priqioctl}; 1037 1038ALTQ_MODULE(altq_priq, ALTQT_PRIQ, &priq_sw); 1039MODULE_DEPEND(altq_priq, altq_red, 1, 1, 1); 1040MODULE_DEPEND(altq_priq, altq_rio, 1, 1, 1); 1041 1042#endif /* KLD_MODULE */ 1043 1044#endif /* ALTQ3_COMPAT */ 1045#endif /* ALTQ_PRIQ */ 1046