altq_priq.c revision 1.17
1 /* $NetBSD: altq_priq.c,v 1.17 2006/10/20 21:55:56 elad 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 1.17 2006/10/20 21:55:56 elad 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 int 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 *, struct altq_pktattr *); 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 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 #endif /* NPF > 0 */ 230 231 /* 232 * bring the interface back to the initial state by discarding 233 * all the filters and classes. 234 */ 235 static int 236 priq_clear_interface(struct priq_if *pif) 237 { 238 struct priq_class *cl; 239 int pri; 240 241 #ifdef ALTQ3_CLFIER_COMPAT 242 /* free the filters for this interface */ 243 acc_discard_filters(&pif->pif_classifier, NULL, 1); 244 #endif 245 246 /* clear out the classes */ 247 for (pri = 0; pri <= pif->pif_maxpri; pri++) 248 if ((cl = pif->pif_classes[pri]) != NULL) 249 priq_class_destroy(cl); 250 251 return (0); 252 } 253 254 static int 255 priq_request(struct ifaltq *ifq, int req, void *arg __unused) 256 { 257 struct priq_if *pif = (struct priq_if *)ifq->altq_disc; 258 259 switch (req) { 260 case ALTRQ_PURGE: 261 priq_purge(pif); 262 break; 263 } 264 return (0); 265 } 266 267 /* discard all the queued packets on the interface */ 268 static void 269 priq_purge(struct priq_if *pif) 270 { 271 struct priq_class *cl; 272 int pri; 273 274 for (pri = 0; pri <= pif->pif_maxpri; pri++) { 275 if ((cl = pif->pif_classes[pri]) != NULL && !qempty(cl->cl_q)) 276 priq_purgeq(cl); 277 } 278 if (ALTQ_IS_ENABLED(pif->pif_ifq)) 279 pif->pif_ifq->ifq_len = 0; 280 } 281 282 static struct priq_class * 283 priq_class_create(struct priq_if *pif, int pri, int qlimit, int flags, int qid) 284 { 285 struct priq_class *cl; 286 int s; 287 288 #ifndef ALTQ_RED 289 if (flags & PRCF_RED) { 290 #ifdef ALTQ_DEBUG 291 printf("priq_class_create: RED not configured for PRIQ!\n"); 292 #endif 293 return (NULL); 294 } 295 #endif 296 297 if ((cl = pif->pif_classes[pri]) != NULL) { 298 /* modify the class instead of creating a new one */ 299 s = splnet(); 300 if (!qempty(cl->cl_q)) 301 priq_purgeq(cl); 302 splx(s); 303 #ifdef ALTQ_RIO 304 if (q_is_rio(cl->cl_q)) 305 rio_destroy((rio_t *)cl->cl_red); 306 #endif 307 #ifdef ALTQ_RED 308 if (q_is_red(cl->cl_q)) 309 red_destroy(cl->cl_red); 310 #endif 311 } else { 312 cl = malloc(sizeof(struct priq_class), M_DEVBUF, 313 M_WAITOK|M_ZERO); 314 if (cl == NULL) 315 return (NULL); 316 317 cl->cl_q = malloc(sizeof(class_queue_t), M_DEVBUF, 318 M_WAITOK|M_ZERO); 319 if (cl->cl_q == NULL) 320 goto err_ret; 321 } 322 323 pif->pif_classes[pri] = cl; 324 if (flags & PRCF_DEFAULTCLASS) 325 pif->pif_default = cl; 326 if (qlimit == 0) 327 qlimit = 50; /* use default */ 328 qlimit(cl->cl_q) = qlimit; 329 qtype(cl->cl_q) = Q_DROPTAIL; 330 qlen(cl->cl_q) = 0; 331 cl->cl_flags = flags; 332 cl->cl_pri = pri; 333 if (pri > pif->pif_maxpri) 334 pif->pif_maxpri = pri; 335 cl->cl_pif = pif; 336 cl->cl_handle = qid; 337 338 #ifdef ALTQ_RED 339 if (flags & (PRCF_RED|PRCF_RIO)) { 340 int red_flags, red_pkttime; 341 342 red_flags = 0; 343 if (flags & PRCF_ECN) 344 red_flags |= REDF_ECN; 345 #ifdef ALTQ_RIO 346 if (flags & PRCF_CLEARDSCP) 347 red_flags |= RIOF_CLEARDSCP; 348 #endif 349 if (pif->pif_bandwidth < 8) 350 red_pkttime = 1000 * 1000 * 1000; /* 1 sec */ 351 else 352 red_pkttime = (int64_t)pif->pif_ifq->altq_ifp->if_mtu 353 * 1000 * 1000 * 1000 / (pif->pif_bandwidth / 8); 354 #ifdef ALTQ_RIO 355 if (flags & PRCF_RIO) { 356 cl->cl_red = (red_t *)rio_alloc(0, NULL, 357 red_flags, red_pkttime); 358 if (cl->cl_red != NULL) 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 qtype(cl->cl_q) = Q_RED; 369 } 370 } 371 #endif /* ALTQ_RED */ 372 373 return (cl); 374 375 err_ret: 376 if (cl->cl_red != NULL) { 377 #ifdef ALTQ_RIO 378 if (q_is_rio(cl->cl_q)) 379 rio_destroy((rio_t *)cl->cl_red); 380 #endif 381 #ifdef ALTQ_RED 382 if (q_is_red(cl->cl_q)) 383 red_destroy(cl->cl_red); 384 #endif 385 } 386 if (cl->cl_q != NULL) 387 free(cl->cl_q, M_DEVBUF); 388 free(cl, M_DEVBUF); 389 return (NULL); 390 } 391 392 static int 393 priq_class_destroy(struct priq_class *cl) 394 { 395 struct priq_if *pif; 396 int s, pri; 397 398 s = splnet(); 399 400 #ifdef ALTQ3_CLFIER_COMPAT 401 /* delete filters referencing to this class */ 402 acc_discard_filters(&cl->cl_pif->pif_classifier, cl, 0); 403 #endif 404 405 if (!qempty(cl->cl_q)) 406 priq_purgeq(cl); 407 408 pif = cl->cl_pif; 409 pif->pif_classes[cl->cl_pri] = NULL; 410 if (pif->pif_maxpri == cl->cl_pri) { 411 for (pri = cl->cl_pri; pri >= 0; pri--) 412 if (pif->pif_classes[pri] != NULL) { 413 pif->pif_maxpri = pri; 414 break; 415 } 416 if (pri < 0) 417 pif->pif_maxpri = -1; 418 } 419 splx(s); 420 421 if (cl->cl_red != NULL) { 422 #ifdef ALTQ_RIO 423 if (q_is_rio(cl->cl_q)) 424 rio_destroy((rio_t *)cl->cl_red); 425 #endif 426 #ifdef ALTQ_RED 427 if (q_is_red(cl->cl_q)) 428 red_destroy(cl->cl_red); 429 #endif 430 } 431 free(cl->cl_q, M_DEVBUF); 432 free(cl, M_DEVBUF); 433 return (0); 434 } 435 436 /* 437 * priq_enqueue is an enqueue function to be registered to 438 * (*altq_enqueue) in struct ifaltq. 439 */ 440 static int 441 priq_enqueue(struct ifaltq *ifq, struct mbuf *m, struct altq_pktattr *pktattr) 442 { 443 struct priq_if *pif = (struct priq_if *)ifq->altq_disc; 444 struct priq_class *cl; 445 struct m_tag *t; 446 int len; 447 448 /* grab class set by classifier */ 449 if ((m->m_flags & M_PKTHDR) == 0) { 450 /* should not happen */ 451 printf("altq: packet for %s does not have pkthdr\n", 452 ifq->altq_ifp->if_xname); 453 m_freem(m); 454 return (ENOBUFS); 455 } 456 cl = NULL; 457 if ((t = m_tag_find(m, PACKET_TAG_PF_QID, NULL)) != NULL) 458 cl = clh_to_clp(pif, ((struct altq_tag *)(t+1))->qid); 459 #ifdef ALTQ3_COMPAT 460 else if ((ifq->altq_flags & ALTQF_CLASSIFY) && pktattr != NULL) 461 cl = pktattr->pattr_class; 462 #endif 463 if (cl == NULL) { 464 cl = pif->pif_default; 465 if (cl == NULL) { 466 m_freem(m); 467 return (ENOBUFS); 468 } 469 } 470 #ifdef ALTQ3_COMPAT 471 if (pktattr != NULL) 472 cl->cl_pktattr = pktattr; /* save proto hdr used by ECN */ 473 else 474 #endif 475 cl->cl_pktattr = NULL; 476 len = m_pktlen(m); 477 if (priq_addq(cl, m) != 0) { 478 /* drop occurred. mbuf was freed in priq_addq. */ 479 PKTCNTR_ADD(&cl->cl_dropcnt, len); 480 return (ENOBUFS); 481 } 482 IFQ_INC_LEN(ifq); 483 484 /* successfully queued. */ 485 return (0); 486 } 487 488 /* 489 * priq_dequeue is a dequeue function to be registered to 490 * (*altq_dequeue) in struct ifaltq. 491 * 492 * note: ALTDQ_POLL returns the next packet without removing the packet 493 * from the queue. ALTDQ_REMOVE is a normal dequeue operation. 494 * ALTDQ_REMOVE must return the same packet if called immediately 495 * after ALTDQ_POLL. 496 */ 497 static struct mbuf * 498 priq_dequeue(struct ifaltq *ifq, int op) 499 { 500 struct priq_if *pif = (struct priq_if *)ifq->altq_disc; 501 struct priq_class *cl; 502 struct mbuf *m; 503 int pri; 504 505 if (IFQ_IS_EMPTY(ifq)) 506 /* no packet in the queue */ 507 return (NULL); 508 509 for (pri = pif->pif_maxpri; pri >= 0; pri--) { 510 if ((cl = pif->pif_classes[pri]) != NULL && 511 !qempty(cl->cl_q)) { 512 if (op == ALTDQ_POLL) 513 return (priq_pollq(cl)); 514 515 m = priq_getq(cl); 516 if (m != NULL) { 517 IFQ_DEC_LEN(ifq); 518 if (qempty(cl->cl_q)) 519 cl->cl_period++; 520 PKTCNTR_ADD(&cl->cl_xmitcnt, m_pktlen(m)); 521 } 522 return (m); 523 } 524 } 525 return (NULL); 526 } 527 528 static int 529 priq_addq(struct priq_class *cl, struct mbuf *m) 530 { 531 532 #ifdef ALTQ_RIO 533 if (q_is_rio(cl->cl_q)) 534 return rio_addq((rio_t *)cl->cl_red, cl->cl_q, m, 535 cl->cl_pktattr); 536 #endif 537 #ifdef ALTQ_RED 538 if (q_is_red(cl->cl_q)) 539 return red_addq(cl->cl_red, cl->cl_q, m, cl->cl_pktattr); 540 #endif 541 if (qlen(cl->cl_q) >= qlimit(cl->cl_q)) { 542 m_freem(m); 543 return (-1); 544 } 545 546 if (cl->cl_flags & PRCF_CLEARDSCP) 547 write_dsfield(m, cl->cl_pktattr, 0); 548 549 _addq(cl->cl_q, m); 550 551 return (0); 552 } 553 554 static struct mbuf * 555 priq_getq(struct priq_class *cl) 556 { 557 #ifdef ALTQ_RIO 558 if (q_is_rio(cl->cl_q)) 559 return rio_getq((rio_t *)cl->cl_red, cl->cl_q); 560 #endif 561 #ifdef ALTQ_RED 562 if (q_is_red(cl->cl_q)) 563 return red_getq(cl->cl_red, cl->cl_q); 564 #endif 565 return _getq(cl->cl_q); 566 } 567 568 static struct mbuf * 569 priq_pollq(cl) 570 struct priq_class *cl; 571 { 572 return qhead(cl->cl_q); 573 } 574 575 static void 576 priq_purgeq(struct priq_class *cl) 577 { 578 struct mbuf *m; 579 580 if (qempty(cl->cl_q)) 581 return; 582 583 while ((m = _getq(cl->cl_q)) != NULL) { 584 PKTCNTR_ADD(&cl->cl_dropcnt, m_pktlen(m)); 585 m_freem(m); 586 } 587 ASSERT(qlen(cl->cl_q) == 0); 588 } 589 590 static void 591 get_class_stats(struct priq_classstats *sp, struct priq_class *cl) 592 { 593 sp->class_handle = cl->cl_handle; 594 sp->qlength = qlen(cl->cl_q); 595 sp->qlimit = qlimit(cl->cl_q); 596 sp->period = cl->cl_period; 597 sp->xmitcnt = cl->cl_xmitcnt; 598 sp->dropcnt = cl->cl_dropcnt; 599 600 sp->qtype = qtype(cl->cl_q); 601 #ifdef ALTQ_RED 602 if (q_is_red(cl->cl_q)) 603 red_getstats(cl->cl_red, &sp->red[0]); 604 #endif 605 #ifdef ALTQ_RIO 606 if (q_is_rio(cl->cl_q)) 607 rio_getstats((rio_t *)cl->cl_red, &sp->red[0]); 608 #endif 609 610 } 611 612 /* convert a class handle to the corresponding class pointer */ 613 static struct priq_class * 614 clh_to_clp(struct priq_if *pif, u_int32_t chandle) 615 { 616 struct priq_class *cl; 617 int idx; 618 619 if (chandle == 0) 620 return (NULL); 621 622 for (idx = pif->pif_maxpri; idx >= 0; idx--) 623 if ((cl = pif->pif_classes[idx]) != NULL && 624 cl->cl_handle == chandle) 625 return (cl); 626 627 return (NULL); 628 } 629 630 631 #ifdef ALTQ3_COMPAT 632 633 static struct priq_if * 634 priq_attach(struct ifaltq *ifq, u_int bandwidth) 635 { 636 struct priq_if *pif; 637 638 pif = malloc(sizeof(struct priq_if), M_DEVBUF, M_WAITOK|M_ZERO); 639 if (pif == NULL) 640 return (NULL); 641 pif->pif_bandwidth = bandwidth; 642 pif->pif_maxpri = -1; 643 pif->pif_ifq = ifq; 644 645 /* add this state to the priq list */ 646 pif->pif_next = pif_list; 647 pif_list = pif; 648 649 return (pif); 650 } 651 652 static int 653 priq_detach(struct priq_if *pif) 654 { 655 (void)priq_clear_interface(pif); 656 657 /* remove this interface from the pif list */ 658 if (pif_list == pif) 659 pif_list = pif->pif_next; 660 else { 661 struct priq_if *p; 662 663 for (p = pif_list; p != NULL; p = p->pif_next) 664 if (p->pif_next == pif) { 665 p->pif_next = pif->pif_next; 666 break; 667 } 668 ASSERT(p != NULL); 669 } 670 671 free(pif, M_DEVBUF); 672 return (0); 673 } 674 675 /* 676 * priq device interface 677 */ 678 int 679 priqopen(dev_t dev __unused, int flag __unused, int fmt __unused, 680 struct lwp *l __unused) 681 { 682 /* everything will be done when the queueing scheme is attached. */ 683 return 0; 684 } 685 686 int 687 priqclose(dev_t dev __unused, int flag __unused, int fmt __unused, 688 struct lwp *l __unused) 689 { 690 struct priq_if *pif; 691 int err, error = 0; 692 693 while ((pif = pif_list) != NULL) { 694 /* destroy all */ 695 if (ALTQ_IS_ENABLED(pif->pif_ifq)) 696 altq_disable(pif->pif_ifq); 697 698 err = altq_detach(pif->pif_ifq); 699 if (err == 0) 700 err = priq_detach(pif); 701 if (err != 0 && error == 0) 702 error = err; 703 } 704 705 return error; 706 } 707 708 int 709 priqioctl(dev_t dev __unused, ioctlcmd_t cmd, caddr_t addr, int flag __unused, 710 struct lwp *l) 711 { 712 struct priq_if *pif; 713 struct priq_interface *ifacep; 714 int error = 0; 715 716 /* check super-user privilege */ 717 switch (cmd) { 718 case PRIQ_GETSTATS: 719 break; 720 default: 721 #if (__FreeBSD_version > 400000) 722 if ((error = suser(p)) != 0) 723 return (error); 724 #else 725 if ((error = kauth_authorize_network(l->l_cred, 726 KAUTH_NETWORK_ALTQ, KAUTH_REQ_NETWORK_ALTQ_PRIQ, NULL, 727 NULL, NULL)) != 0) 728 return (error); 729 #endif 730 break; 731 } 732 733 switch (cmd) { 734 735 case PRIQ_IF_ATTACH: 736 error = priqcmd_if_attach((struct priq_interface *)addr); 737 break; 738 739 case PRIQ_IF_DETACH: 740 error = priqcmd_if_detach((struct priq_interface *)addr); 741 break; 742 743 case PRIQ_ENABLE: 744 case PRIQ_DISABLE: 745 case PRIQ_CLEAR: 746 ifacep = (struct priq_interface *)addr; 747 if ((pif = altq_lookup(ifacep->ifname, 748 ALTQT_PRIQ)) == NULL) { 749 error = EBADF; 750 break; 751 } 752 753 switch (cmd) { 754 case PRIQ_ENABLE: 755 if (pif->pif_default == NULL) { 756 #ifdef ALTQ_DEBUG 757 printf("priq: no default class\n"); 758 #endif 759 error = EINVAL; 760 break; 761 } 762 error = altq_enable(pif->pif_ifq); 763 break; 764 765 case PRIQ_DISABLE: 766 error = altq_disable(pif->pif_ifq); 767 break; 768 769 case PRIQ_CLEAR: 770 priq_clear_interface(pif); 771 break; 772 } 773 break; 774 775 case PRIQ_ADD_CLASS: 776 error = priqcmd_add_class((struct priq_add_class *)addr); 777 break; 778 779 case PRIQ_DEL_CLASS: 780 error = priqcmd_delete_class((struct priq_delete_class *)addr); 781 break; 782 783 case PRIQ_MOD_CLASS: 784 error = priqcmd_modify_class((struct priq_modify_class *)addr); 785 break; 786 787 case PRIQ_ADD_FILTER: 788 error = priqcmd_add_filter((struct priq_add_filter *)addr); 789 break; 790 791 case PRIQ_DEL_FILTER: 792 error = priqcmd_delete_filter((struct priq_delete_filter *)addr); 793 break; 794 795 case PRIQ_GETSTATS: 796 error = priqcmd_class_stats((struct priq_class_stats *)addr); 797 break; 798 799 default: 800 error = EINVAL; 801 break; 802 } 803 return error; 804 } 805 806 static int 807 priqcmd_if_attach(struct priq_interface *ap) 808 { 809 struct priq_if *pif; 810 struct ifnet *ifp; 811 int error; 812 813 if ((ifp = ifunit(ap->ifname)) == NULL) 814 return (ENXIO); 815 816 if ((pif = priq_attach(&ifp->if_snd, ap->arg)) == NULL) 817 return (ENOMEM); 818 819 /* 820 * set PRIQ to this ifnet structure. 821 */ 822 if ((error = altq_attach(&ifp->if_snd, ALTQT_PRIQ, pif, 823 priq_enqueue, priq_dequeue, priq_request, 824 &pif->pif_classifier, acc_classify)) != 0) 825 (void)priq_detach(pif); 826 827 return (error); 828 } 829 830 static int 831 priqcmd_if_detach(struct priq_interface *ap) 832 { 833 struct priq_if *pif; 834 int error; 835 836 if ((pif = altq_lookup(ap->ifname, ALTQT_PRIQ)) == NULL) 837 return (EBADF); 838 839 if (ALTQ_IS_ENABLED(pif->pif_ifq)) 840 altq_disable(pif->pif_ifq); 841 842 if ((error = altq_detach(pif->pif_ifq))) 843 return (error); 844 845 return priq_detach(pif); 846 } 847 848 static int 849 priqcmd_add_class(struct priq_add_class *ap) 850 { 851 struct priq_if *pif; 852 struct priq_class *cl; 853 int qid; 854 855 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 856 return (EBADF); 857 858 if (ap->pri < 0 || ap->pri >= PRIQ_MAXPRI) 859 return (EINVAL); 860 if (pif->pif_classes[ap->pri] != NULL) 861 return (EBUSY); 862 863 qid = ap->pri + 1; 864 if ((cl = priq_class_create(pif, ap->pri, 865 ap->qlimit, ap->flags, qid)) == NULL) 866 return (ENOMEM); 867 868 /* return a class handle to the user */ 869 ap->class_handle = cl->cl_handle; 870 871 return (0); 872 } 873 874 static int 875 priqcmd_delete_class(struct priq_delete_class *ap) 876 { 877 struct priq_if *pif; 878 struct priq_class *cl; 879 880 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 881 return (EBADF); 882 883 if ((cl = clh_to_clp(pif, ap->class_handle)) == NULL) 884 return (EINVAL); 885 886 return priq_class_destroy(cl); 887 } 888 889 static int 890 priqcmd_modify_class(struct priq_modify_class *ap) 891 { 892 struct priq_if *pif; 893 struct priq_class *cl; 894 895 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 896 return (EBADF); 897 898 if (ap->pri < 0 || ap->pri >= PRIQ_MAXPRI) 899 return (EINVAL); 900 901 if ((cl = clh_to_clp(pif, ap->class_handle)) == NULL) 902 return (EINVAL); 903 904 /* 905 * if priority is changed, move the class to the new priority 906 */ 907 if (pif->pif_classes[ap->pri] != cl) { 908 if (pif->pif_classes[ap->pri] != NULL) 909 return (EEXIST); 910 pif->pif_classes[cl->cl_pri] = NULL; 911 pif->pif_classes[ap->pri] = cl; 912 cl->cl_pri = ap->pri; 913 } 914 915 /* call priq_class_create to change class parameters */ 916 if ((cl = priq_class_create(pif, ap->pri, 917 ap->qlimit, ap->flags, ap->class_handle)) == NULL) 918 return (ENOMEM); 919 return 0; 920 } 921 922 static int 923 priqcmd_add_filter(struct priq_add_filter *ap) 924 { 925 struct priq_if *pif; 926 struct priq_class *cl; 927 928 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 929 return (EBADF); 930 931 if ((cl = clh_to_clp(pif, ap->class_handle)) == NULL) 932 return (EINVAL); 933 934 return acc_add_filter(&pif->pif_classifier, &ap->filter, 935 cl, &ap->filter_handle); 936 } 937 938 static int 939 priqcmd_delete_filter(struct priq_delete_filter *ap) 940 { 941 struct priq_if *pif; 942 943 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 944 return (EBADF); 945 946 return acc_delete_filter(&pif->pif_classifier, 947 ap->filter_handle); 948 } 949 950 static int 951 priqcmd_class_stats(struct priq_class_stats *ap) 952 { 953 struct priq_if *pif; 954 struct priq_class *cl; 955 struct priq_classstats stats, *usp; 956 int pri, error; 957 958 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 959 return (EBADF); 960 961 ap->maxpri = pif->pif_maxpri; 962 963 /* then, read the next N classes in the tree */ 964 usp = ap->stats; 965 for (pri = 0; pri <= pif->pif_maxpri; pri++) { 966 cl = pif->pif_classes[pri]; 967 if (cl != NULL) 968 get_class_stats(&stats, cl); 969 else 970 memset(&stats, 0, sizeof(stats)); 971 if ((error = copyout((caddr_t)&stats, (caddr_t)usp++, 972 sizeof(stats))) != 0) 973 return (error); 974 } 975 return (0); 976 } 977 978 #ifdef KLD_MODULE 979 980 static struct altqsw priq_sw = 981 {"priq", priqopen, priqclose, priqioctl}; 982 983 ALTQ_MODULE(altq_priq, ALTQT_PRIQ, &priq_sw); 984 MODULE_DEPEND(altq_priq, altq_red, 1, 1, 1); 985 MODULE_DEPEND(altq_priq, altq_rio, 1, 1, 1); 986 987 #endif /* KLD_MODULE */ 988 989 #endif /* ALTQ3_COMPAT */ 990 #endif /* ALTQ_PRIQ */ 991
Indexes created Mon Sep 29 21:09:56 GMT 2025