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