1 /* $NetBSD: altq_priq.c,v 1.29 2025/01/08 13:00:04 joe Exp $ */ 2 /* $KAME: altq_priq.c,v 1.13 2005/04/13 03:44:25 suz 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 /* 30 * priority queue 31 */ 32 33 #include <sys/cdefs.h> 34 __KERNEL_RCSID(0, "$NetBSD: altq_priq.c,v 1.29 2025/01/08 13:00:04 joe Exp $"); 35 36 #ifdef _KERNEL_OPT 37 #include "opt_altq.h" 38 #include "opt_inet.h" 39 #include "pf.h" 40 #endif 41 42 #ifdef ALTQ_PRIQ /* priq is enabled by ALTQ_PRIQ option in opt_altq.h */ 43 44 #include <sys/param.h> 45 #include <sys/malloc.h> 46 #include <sys/mbuf.h> 47 #include <sys/socket.h> 48 #include <sys/sockio.h> 49 #include <sys/systm.h> 50 #include <sys/proc.h> 51 #include <sys/errno.h> 52 #include <sys/kernel.h> 53 #include <sys/queue.h> 54 #include <sys/kauth.h> 55 56 #include <net/if.h> 57 #include <netinet/in.h> 58 59 #if NPF > 0 60 #include <net/pfvar.h> 61 #endif 62 #include <altq/altq.h> 63 #include <altq/altq_conf.h> 64 #include <altq/altq_priq.h> 65 66 /* 67 * function prototypes 68 */ 69 #ifdef ALTQ3_COMPAT 70 static struct priq_if *priq_attach(struct ifaltq *, u_int); 71 static void priq_detach(struct priq_if *); 72 #endif 73 static int priq_clear_interface(struct priq_if *); 74 static int priq_request(struct ifaltq *, int, void *); 75 static void priq_purge(struct priq_if *); 76 static struct priq_class *priq_class_create(struct priq_if *, int, int, int, 77 int); 78 static int priq_class_destroy(struct priq_class *); 79 static int priq_enqueue(struct ifaltq *, struct mbuf *); 80 static struct mbuf *priq_dequeue(struct ifaltq *, int); 81 82 static int priq_addq(struct priq_class *, struct mbuf *); 83 static struct mbuf *priq_getq(struct priq_class *); 84 static struct mbuf *priq_pollq(struct priq_class *); 85 static void priq_purgeq(struct priq_class *); 86 87 #ifdef ALTQ3_COMPAT 88 static int priqcmd_if_attach(struct priq_interface *); 89 static int priqcmd_if_detach(struct priq_interface *); 90 static int priqcmd_add_class(struct priq_add_class *); 91 static int priqcmd_delete_class(struct priq_delete_class *); 92 static int priqcmd_modify_class(struct priq_modify_class *); 93 static int priqcmd_add_filter(struct priq_add_filter *); 94 static int priqcmd_delete_filter(struct priq_delete_filter *); 95 static int priqcmd_class_stats(struct priq_class_stats *); 96 #endif /* ALTQ3_COMPAT */ 97 98 static void get_class_stats(struct priq_classstats *, struct priq_class *); 99 static struct priq_class *clh_to_clp(struct priq_if *, u_int32_t); 100 101 #ifdef ALTQ3_COMPAT 102 altqdev_decl(priq); 103 104 /* pif_list keeps all priq_if's allocated. */ 105 static struct priq_if *pif_list = NULL; 106 #endif /* ALTQ3_COMPAT */ 107 108 #if NPF > 0 109 int 110 priq_pfattach(struct pf_altq *a) 111 { 112 struct ifnet *ifp; 113 int s, error; 114 115 if ((ifp = ifunit(a->ifname)) == NULL || a->altq_disc == NULL) 116 return EINVAL; 117 s = splnet(); 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 } 123 124 int 125 priq_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_WAITOK|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 } 147 148 int 149 priq_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 } 162 163 int 164 priq_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 } 189 190 int 191 priq_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 } 204 205 int 206 priq_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 memset(&stats, 0, sizeof(stats)); 223 get_class_stats(&stats, cl); 224 225 if ((error = copyout((void *)&stats, ubuf, sizeof(stats))) != 0) 226 return error; 227 *nbytes = sizeof(stats); 228 return 0; 229 } 230 #endif /* NPF > 0 */ 231 232 /* 233 * bring the interface back to the initial state by discarding 234 * all the filters and classes. 235 */ 236 static int 237 priq_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 } 254 255 static int 256 priq_request(struct ifaltq *ifq, int req, void *arg) 257 { 258 struct priq_if *pif = (struct priq_if *)ifq->altq_disc; 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 */ 269 static void 270 priq_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 } 282 283 static struct priq_class * 284 priq_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 s = splnet(); 301 if (!qempty(cl->cl_q)) 302 priq_purgeq(cl); 303 splx(s); 304 #ifdef ALTQ_RIO 305 if (q_is_rio(cl->cl_q)) 306 rio_destroy((rio_t *)cl->cl_red); 307 #endif 308 #ifdef ALTQ_RED 309 if (q_is_red(cl->cl_q)) 310 red_destroy(cl->cl_red); 311 #endif 312 } else { 313 cl = malloc(sizeof(struct priq_class), M_DEVBUF, 314 M_WAITOK|M_ZERO); 315 if (cl == NULL) 316 return NULL; 317 318 cl->cl_q = malloc(sizeof(class_queue_t), M_DEVBUF, 319 M_WAITOK|M_ZERO); 320 if (cl->cl_q == NULL) { 321 free(cl, M_DEVBUF); 322 return NULL; 323 } 324 } 325 326 pif->pif_classes[pri] = cl; 327 if (flags & PRCF_DEFAULTCLASS) 328 pif->pif_default = cl; 329 if (qlimit == 0) 330 qlimit = 50; /* use default */ 331 qlimit(cl->cl_q) = qlimit; 332 qtype(cl->cl_q) = Q_DROPTAIL; 333 qlen(cl->cl_q) = 0; 334 cl->cl_flags = flags; 335 cl->cl_pri = pri; 336 if (pri > pif->pif_maxpri) 337 pif->pif_maxpri = pri; 338 cl->cl_pif = pif; 339 cl->cl_handle = qid; 340 341 #ifdef ALTQ_RED 342 if (flags & (PRCF_RED|PRCF_RIO)) { 343 int red_flags, red_pkttime; 344 345 red_flags = 0; 346 if (flags & PRCF_ECN) 347 red_flags |= REDF_ECN; 348 #ifdef ALTQ_RIO 349 if (flags & PRCF_CLEARDSCP) 350 red_flags |= RIOF_CLEARDSCP; 351 #endif 352 if (pif->pif_bandwidth < 8) 353 red_pkttime = 1000 * 1000 * 1000; /* 1 sec */ 354 else 355 red_pkttime = (int64_t)pif->pif_ifq->altq_ifp->if_mtu 356 * 1000 * 1000 * 1000 / (pif->pif_bandwidth / 8); 357 #ifdef ALTQ_RIO 358 if (flags & PRCF_RIO) { 359 cl->cl_red = (red_t *)rio_alloc(0, NULL, 360 red_flags, red_pkttime); 361 if (cl->cl_red != NULL) 362 qtype(cl->cl_q) = Q_RIO; 363 } else 364 #endif 365 if (flags & PRCF_RED) { 366 cl->cl_red = red_alloc(0, 0, 367 qlimit(cl->cl_q) * 10/100, 368 qlimit(cl->cl_q) * 30/100, 369 red_flags, red_pkttime); 370 if (cl->cl_red != NULL) 371 qtype(cl->cl_q) = Q_RED; 372 } 373 } 374 #endif /* ALTQ_RED */ 375 376 return cl; 377 } 378 379 static int 380 priq_class_destroy(struct priq_class *cl) 381 { 382 struct priq_if *pif; 383 int s, pri; 384 385 s = splnet(); 386 387 #ifdef ALTQ3_CLFIER_COMPAT 388 /* delete filters referencing to this class */ 389 acc_discard_filters(&cl->cl_pif->pif_classifier, cl, 0); 390 #endif 391 392 if (!qempty(cl->cl_q)) 393 priq_purgeq(cl); 394 395 pif = cl->cl_pif; 396 pif->pif_classes[cl->cl_pri] = NULL; 397 if (pif->pif_maxpri == cl->cl_pri) { 398 for (pri = cl->cl_pri; pri >= 0; pri--) 399 if (pif->pif_classes[pri] != NULL) { 400 pif->pif_maxpri = pri; 401 break; 402 } 403 if (pri < 0) 404 pif->pif_maxpri = -1; 405 } 406 splx(s); 407 408 if (cl->cl_red != NULL) { 409 #ifdef ALTQ_RIO 410 if (q_is_rio(cl->cl_q)) 411 rio_destroy((rio_t *)cl->cl_red); 412 #endif 413 #ifdef ALTQ_RED 414 if (q_is_red(cl->cl_q)) 415 red_destroy(cl->cl_red); 416 #endif 417 } 418 free(cl->cl_q, M_DEVBUF); 419 free(cl, M_DEVBUF); 420 return 0; 421 } 422 423 /* 424 * priq_enqueue is an enqueue function to be registered to 425 * (*altq_enqueue) in struct ifaltq. 426 */ 427 static int 428 priq_enqueue(struct ifaltq *ifq, struct mbuf *m) 429 { 430 struct altq_pktattr pktattr; 431 struct priq_if *pif = (struct priq_if *)ifq->altq_disc; 432 struct priq_class *cl; 433 struct m_tag *t; 434 int len; 435 436 /* grab class set by classifier */ 437 if ((m->m_flags & M_PKTHDR) == 0) { 438 /* should not happen */ 439 printf("altq: packet for %s does not have pkthdr\n", 440 ifq->altq_ifp->if_xname); 441 m_freem(m); 442 return ENOBUFS; 443 } 444 cl = NULL; 445 if ((t = m_tag_find(m, PACKET_TAG_ALTQ_QID)) != NULL) 446 cl = clh_to_clp(pif, ((struct altq_tag *)(t+1))->qid); 447 #ifdef ALTQ3_COMPAT 448 else if (ifq->altq_flags & ALTQF_CLASSIFY) 449 cl = m->m_pkthdr.pattr_class; 450 #endif 451 if (cl == NULL) { 452 cl = pif->pif_default; 453 if (cl == NULL) { 454 m_freem(m); 455 return ENOBUFS; 456 } 457 } 458 #ifdef ALTQ3_COMPAT 459 if (m->m_pkthdr.pattr_af != AF_UNSPEC) { 460 pktattr.pattr_class = m->m_pkthdr.pattr_class; 461 pktattr.pattr_af = m->m_pkthdr.pattr_af; 462 pktattr.pattr_hdr = m->m_pkthdr.pattr_hdr; 463 464 cl->cl_pktattr = &pktattr; /* save proto hdr used by ECN */ 465 } else 466 #endif 467 cl->cl_pktattr = NULL; 468 len = m_pktlen(m); 469 if (priq_addq(cl, m) != 0) { 470 /* drop occurred. mbuf was freed in priq_addq. */ 471 PKTCNTR_ADD(&cl->cl_dropcnt, len); 472 return ENOBUFS; 473 } 474 IFQ_INC_LEN(ifq); 475 476 /* successfully queued. */ 477 return 0; 478 } 479 480 /* 481 * priq_dequeue is a dequeue function to be registered to 482 * (*altq_dequeue) in struct ifaltq. 483 * 484 * note: ALTDQ_POLL returns the next packet without removing the packet 485 * from the queue. ALTDQ_REMOVE is a normal dequeue operation. 486 * ALTDQ_REMOVE must return the same packet if called immediately 487 * after ALTDQ_POLL. 488 */ 489 static struct mbuf * 490 priq_dequeue(struct ifaltq *ifq, int op) 491 { 492 struct priq_if *pif = (struct priq_if *)ifq->altq_disc; 493 struct priq_class *cl; 494 struct mbuf *m; 495 int pri; 496 497 if (IFQ_IS_EMPTY(ifq)) 498 /* no packet in the queue */ 499 return NULL; 500 501 for (pri = pif->pif_maxpri; pri >= 0; pri--) { 502 if ((cl = pif->pif_classes[pri]) != NULL && 503 !qempty(cl->cl_q)) { 504 if (op == ALTDQ_POLL) 505 return priq_pollq(cl); 506 507 m = priq_getq(cl); 508 if (m != NULL) { 509 IFQ_DEC_LEN(ifq); 510 if (qempty(cl->cl_q)) 511 cl->cl_period++; 512 PKTCNTR_ADD(&cl->cl_xmitcnt, m_pktlen(m)); 513 } 514 return m; 515 } 516 } 517 return NULL; 518 } 519 520 static int 521 priq_addq(struct priq_class *cl, struct mbuf *m) 522 { 523 524 #ifdef ALTQ_RIO 525 if (q_is_rio(cl->cl_q)) 526 return rio_addq((rio_t *)cl->cl_red, cl->cl_q, m, 527 cl->cl_pktattr); 528 #endif 529 #ifdef ALTQ_RED 530 if (q_is_red(cl->cl_q)) 531 return red_addq(cl->cl_red, cl->cl_q, m, cl->cl_pktattr); 532 #endif 533 if (qlen(cl->cl_q) >= qlimit(cl->cl_q)) { 534 m_freem(m); 535 return -1; 536 } 537 538 if (cl->cl_flags & PRCF_CLEARDSCP) 539 write_dsfield(m, cl->cl_pktattr, 0); 540 541 _addq(cl->cl_q, m); 542 543 return 0; 544 } 545 546 static struct mbuf * 547 priq_getq(struct priq_class *cl) 548 { 549 #ifdef ALTQ_RIO 550 if (q_is_rio(cl->cl_q)) 551 return rio_getq((rio_t *)cl->cl_red, cl->cl_q); 552 #endif 553 #ifdef ALTQ_RED 554 if (q_is_red(cl->cl_q)) 555 return red_getq(cl->cl_red, cl->cl_q); 556 #endif 557 return _getq(cl->cl_q); 558 } 559 560 static struct mbuf * 561 priq_pollq(struct priq_class *cl) 562 { 563 return qhead(cl->cl_q); 564 } 565 566 static void 567 priq_purgeq(struct priq_class *cl) 568 { 569 struct mbuf *m; 570 571 if (qempty(cl->cl_q)) 572 return; 573 574 while ((m = _getq(cl->cl_q)) != NULL) { 575 PKTCNTR_ADD(&cl->cl_dropcnt, m_pktlen(m)); 576 m_freem(m); 577 } 578 ASSERT(qlen(cl->cl_q) == 0); 579 } 580 581 static void 582 get_class_stats(struct priq_classstats *sp, struct priq_class *cl) 583 { 584 sp->class_handle = cl->cl_handle; 585 sp->qlength = qlen(cl->cl_q); 586 sp->qlimit = qlimit(cl->cl_q); 587 sp->period = cl->cl_period; 588 sp->xmitcnt = cl->cl_xmitcnt; 589 sp->dropcnt = cl->cl_dropcnt; 590 591 sp->qtype = qtype(cl->cl_q); 592 #ifdef ALTQ_RED 593 if (q_is_red(cl->cl_q)) 594 red_getstats(cl->cl_red, &sp->red[0]); 595 #endif 596 #ifdef ALTQ_RIO 597 if (q_is_rio(cl->cl_q)) 598 rio_getstats((rio_t *)cl->cl_red, &sp->red[0]); 599 #endif 600 601 } 602 603 /* convert a class handle to the corresponding class pointer */ 604 static struct priq_class * 605 clh_to_clp(struct priq_if *pif, u_int32_t chandle) 606 { 607 struct priq_class *cl; 608 int idx; 609 610 if (chandle == 0) 611 return NULL; 612 613 for (idx = pif->pif_maxpri; idx >= 0; idx--) 614 if ((cl = pif->pif_classes[idx]) != NULL && 615 cl->cl_handle == chandle) 616 return cl; 617 618 return NULL; 619 } 620 621 622 #ifdef ALTQ3_COMPAT 623 624 static struct priq_if * 625 priq_attach(struct ifaltq *ifq, u_int bandwidth) 626 { 627 struct priq_if *pif; 628 629 pif = malloc(sizeof(struct priq_if), M_DEVBUF, M_WAITOK|M_ZERO); 630 if (pif == NULL) 631 return NULL; 632 pif->pif_bandwidth = bandwidth; 633 pif->pif_maxpri = -1; 634 pif->pif_ifq = ifq; 635 636 /* add this state to the priq list */ 637 pif->pif_next = pif_list; 638 pif_list = pif; 639 640 return pif; 641 } 642 643 static void 644 priq_detach(struct priq_if *pif) 645 { 646 (void)priq_clear_interface(pif); 647 648 /* remove this interface from the pif list */ 649 if (pif_list == pif) 650 pif_list = pif->pif_next; 651 else { 652 struct priq_if *p; 653 654 for (p = pif_list; p != NULL; p = p->pif_next) 655 if (p->pif_next == pif) { 656 p->pif_next = pif->pif_next; 657 break; 658 } 659 ASSERT(p != NULL); 660 } 661 662 free(pif, M_DEVBUF); 663 } 664 665 /* 666 * priq device interface 667 */ 668 int 669 priqopen(dev_t dev, int flag, int fmt, 670 struct lwp *l) 671 { 672 /* everything will be done when the queueing scheme is attached. */ 673 return 0; 674 } 675 676 int 677 priqclose(dev_t dev, int flag, int fmt, 678 struct lwp *l) 679 { 680 struct priq_if *pif; 681 682 while ((pif = pif_list) != NULL) { 683 /* destroy all */ 684 if (ALTQ_IS_ENABLED(pif->pif_ifq)) 685 altq_disable(pif->pif_ifq); 686 687 int error = altq_detach(pif->pif_ifq); 688 switch (error) { 689 case 0: 690 case ENXIO: /* already disabled */ 691 break; 692 default: 693 return error; 694 } 695 priq_detach(pif); 696 } 697 698 return 0; 699 } 700 701 int 702 priqioctl(dev_t dev, ioctlcmd_t cmd, void *addr, int flag, 703 struct lwp *l) 704 { 705 struct priq_if *pif; 706 struct priq_interface *ifacep; 707 int error = 0; 708 709 /* check super-user privilege */ 710 switch (cmd) { 711 case PRIQ_GETSTATS: 712 break; 713 default: 714 if ((error = kauth_authorize_network(l->l_cred, 715 KAUTH_NETWORK_ALTQ, KAUTH_REQ_NETWORK_ALTQ_PRIQ, NULL, 716 NULL, NULL)) != 0) 717 return (error); 718 break; 719 } 720 721 switch (cmd) { 722 723 case PRIQ_IF_ATTACH: 724 error = priqcmd_if_attach((struct priq_interface *)addr); 725 break; 726 727 case PRIQ_IF_DETACH: 728 error = priqcmd_if_detach((struct priq_interface *)addr); 729 break; 730 731 case PRIQ_ENABLE: 732 case PRIQ_DISABLE: 733 case PRIQ_CLEAR: 734 ifacep = (struct priq_interface *)addr; 735 if ((pif = altq_lookup(ifacep->ifname, 736 ALTQT_PRIQ)) == NULL) { 737 error = EBADF; 738 break; 739 } 740 741 switch (cmd) { 742 case PRIQ_ENABLE: 743 if (pif->pif_default == NULL) { 744 #ifdef ALTQ_DEBUG 745 printf("priq: no default class\n"); 746 #endif 747 error = EINVAL; 748 break; 749 } 750 error = altq_enable(pif->pif_ifq); 751 break; 752 753 case PRIQ_DISABLE: 754 error = altq_disable(pif->pif_ifq); 755 break; 756 757 case PRIQ_CLEAR: 758 priq_clear_interface(pif); 759 break; 760 } 761 break; 762 763 case PRIQ_ADD_CLASS: 764 error = priqcmd_add_class((struct priq_add_class *)addr); 765 break; 766 767 case PRIQ_DEL_CLASS: 768 error = priqcmd_delete_class((struct priq_delete_class *)addr); 769 break; 770 771 case PRIQ_MOD_CLASS: 772 error = priqcmd_modify_class((struct priq_modify_class *)addr); 773 break; 774 775 case PRIQ_ADD_FILTER: 776 error = priqcmd_add_filter((struct priq_add_filter *)addr); 777 break; 778 779 case PRIQ_DEL_FILTER: 780 error = priqcmd_delete_filter((struct priq_delete_filter *)addr); 781 break; 782 783 case PRIQ_GETSTATS: 784 error = priqcmd_class_stats((struct priq_class_stats *)addr); 785 break; 786 787 default: 788 error = EINVAL; 789 break; 790 } 791 return error; 792 } 793 794 static int 795 priqcmd_if_attach(struct priq_interface *ap) 796 { 797 struct priq_if *pif; 798 struct ifnet *ifp; 799 int error; 800 801 if ((ifp = ifunit(ap->ifname)) == NULL) 802 return ENXIO; 803 804 if ((pif = priq_attach(&ifp->if_snd, ap->arg)) == NULL) 805 return ENOMEM; 806 807 /* 808 * set PRIQ to this ifnet structure. 809 */ 810 if ((error = altq_attach(&ifp->if_snd, ALTQT_PRIQ, pif, 811 priq_enqueue, priq_dequeue, priq_request, 812 &pif->pif_classifier, acc_classify)) != 0) 813 priq_detach(pif); 814 815 return error; 816 } 817 818 static int 819 priqcmd_if_detach(struct priq_interface *ap) 820 { 821 struct priq_if *pif; 822 int error; 823 824 if ((pif = altq_lookup(ap->ifname, ALTQT_PRIQ)) == NULL) 825 return EBADF; 826 827 if (ALTQ_IS_ENABLED(pif->pif_ifq)) 828 altq_disable(pif->pif_ifq); 829 830 if ((error = altq_detach(pif->pif_ifq))) 831 return error; 832 833 priq_detach(pif); 834 return 0; 835 } 836 837 static int 838 priqcmd_add_class(struct priq_add_class *ap) 839 { 840 struct priq_if *pif; 841 struct priq_class *cl; 842 int qid; 843 844 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 845 return EBADF; 846 847 if (ap->pri < 0 || ap->pri >= PRIQ_MAXPRI) 848 return EINVAL; 849 if (pif->pif_classes[ap->pri] != NULL) 850 return EBUSY; 851 852 qid = ap->pri + 1; 853 if ((cl = priq_class_create(pif, ap->pri, 854 ap->qlimit, ap->flags, qid)) == NULL) 855 return ENOMEM; 856 857 /* return a class handle to the user */ 858 ap->class_handle = cl->cl_handle; 859 860 return 0; 861 } 862 863 static int 864 priqcmd_delete_class(struct priq_delete_class *ap) 865 { 866 struct priq_if *pif; 867 struct priq_class *cl; 868 869 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 870 return EBADF; 871 872 if ((cl = clh_to_clp(pif, ap->class_handle)) == NULL) 873 return EINVAL; 874 875 return priq_class_destroy(cl); 876 } 877 878 static int 879 priqcmd_modify_class(struct priq_modify_class *ap) 880 { 881 struct priq_if *pif; 882 struct priq_class *cl; 883 884 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 885 return EBADF; 886 887 if (ap->pri < 0 || ap->pri >= PRIQ_MAXPRI) 888 return EINVAL; 889 890 if ((cl = clh_to_clp(pif, ap->class_handle)) == NULL) 891 return EINVAL; 892 893 /* 894 * if priority is changed, move the class to the new priority 895 */ 896 if (pif->pif_classes[ap->pri] != cl) { 897 if (pif->pif_classes[ap->pri] != NULL) 898 return EEXIST; 899 pif->pif_classes[cl->cl_pri] = NULL; 900 pif->pif_classes[ap->pri] = cl; 901 cl->cl_pri = ap->pri; 902 } 903 904 /* call priq_class_create to change class parameters */ 905 if ((cl = priq_class_create(pif, ap->pri, 906 ap->qlimit, ap->flags, ap->class_handle)) == NULL) 907 return ENOMEM; 908 return 0; 909 } 910 911 static int 912 priqcmd_add_filter(struct priq_add_filter *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 acc_add_filter(&pif->pif_classifier, &ap->filter, 924 cl, &ap->filter_handle); 925 } 926 927 static int 928 priqcmd_delete_filter(struct priq_delete_filter *ap) 929 { 930 struct priq_if *pif; 931 932 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 933 return EBADF; 934 935 return acc_delete_filter(&pif->pif_classifier, 936 ap->filter_handle); 937 } 938 939 static int 940 priqcmd_class_stats(struct priq_class_stats *ap) 941 { 942 struct priq_if *pif; 943 struct priq_class *cl; 944 struct priq_classstats stats, *usp; 945 int pri, error; 946 947 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 948 return EBADF; 949 950 ap->maxpri = pif->pif_maxpri; 951 952 /* then, read the next N classes in the tree */ 953 usp = ap->stats; 954 for (pri = 0; pri <= pif->pif_maxpri; pri++) { 955 cl = pif->pif_classes[pri]; 956 memset(&stats, 0, sizeof(stats)); 957 if (cl != NULL) 958 get_class_stats(&stats, cl); 959 if ((error = copyout((void *)&stats, (void *)usp++, 960 sizeof(stats))) != 0) 961 return error; 962 } 963 return 0; 964 } 965 966 #ifdef KLD_MODULE 967 968 static struct altqsw priq_sw = 969 {"priq", priqopen, priqclose, priqioctl}; 970 971 ALTQ_MODULE(altq_priq, ALTQT_PRIQ, &priq_sw); 972 MODULE_DEPEND(altq_priq, altq_red, 1, 1, 1); 973 MODULE_DEPEND(altq_priq, altq_rio, 1, 1, 1); 974 975 #endif /* KLD_MODULE */ 976 977 #endif /* ALTQ3_COMPAT */ 978 #endif /* ALTQ_PRIQ */ 979
Indexes created Sat Sep 20 22:09:52 GMT 2025