altq_priq.c revision 1.15
1 /* $NetBSD: altq_priq.c,v 1.15 2006/10/12 19:59:08 peter 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 1.15 2006/10/12 19:59:08 peter Exp $"); 35 36 #ifdef _KERNEL_OPT 37 #include "opt_altq.h" 38 #include "opt_inet.h" 39 #endif 40 41 #ifdef ALTQ_PRIQ /* priq is enabled by ALTQ_PRIQ option in opt_altq.h */ 42 43 #include <sys/param.h> 44 #include <sys/malloc.h> 45 #include <sys/mbuf.h> 46 #include <sys/socket.h> 47 #include <sys/sockio.h> 48 #include <sys/systm.h> 49 #include <sys/proc.h> 50 #include <sys/errno.h> 51 #include <sys/kernel.h> 52 #include <sys/queue.h> 53 #include <sys/kauth.h> 54 55 #include <net/if.h> 56 #include <netinet/in.h> 57 58 #include <net/pfvar.h> 59 #include <altq/altq.h> 60 #include <altq/altq_conf.h> 61 #include <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_WAITOK|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 __unused) 251 { 252 struct priq_if *pif = (struct priq_if *)ifq->altq_disc; 253 254 switch (req) { 255 case ALTRQ_PURGE: 256 priq_purge(pif); 257 break; 258 } 259 return (0); 260 } 261 262 /* discard all the queued packets on the interface */ 263 static void 264 priq_purge(struct priq_if *pif) 265 { 266 struct priq_class *cl; 267 int pri; 268 269 for (pri = 0; pri <= pif->pif_maxpri; pri++) { 270 if ((cl = pif->pif_classes[pri]) != NULL && !qempty(cl->cl_q)) 271 priq_purgeq(cl); 272 } 273 if (ALTQ_IS_ENABLED(pif->pif_ifq)) 274 pif->pif_ifq->ifq_len = 0; 275 } 276 277 static struct priq_class * 278 priq_class_create(struct priq_if *pif, int pri, int qlimit, int flags, int qid) 279 { 280 struct priq_class *cl; 281 int s; 282 283 #ifndef ALTQ_RED 284 if (flags & PRCF_RED) { 285 #ifdef ALTQ_DEBUG 286 printf("priq_class_create: RED not configured for PRIQ!\n"); 287 #endif 288 return (NULL); 289 } 290 #endif 291 292 if ((cl = pif->pif_classes[pri]) != NULL) { 293 /* modify the class instead of creating a new one */ 294 s = splnet(); 295 if (!qempty(cl->cl_q)) 296 priq_purgeq(cl); 297 splx(s); 298 #ifdef ALTQ_RIO 299 if (q_is_rio(cl->cl_q)) 300 rio_destroy((rio_t *)cl->cl_red); 301 #endif 302 #ifdef ALTQ_RED 303 if (q_is_red(cl->cl_q)) 304 red_destroy(cl->cl_red); 305 #endif 306 } else { 307 cl = malloc(sizeof(struct priq_class), M_DEVBUF, 308 M_WAITOK|M_ZERO); 309 if (cl == NULL) 310 return (NULL); 311 312 cl->cl_q = malloc(sizeof(class_queue_t), M_DEVBUF, 313 M_WAITOK|M_ZERO); 314 if (cl->cl_q == NULL) 315 goto err_ret; 316 } 317 318 pif->pif_classes[pri] = cl; 319 if (flags & PRCF_DEFAULTCLASS) 320 pif->pif_default = cl; 321 if (qlimit == 0) 322 qlimit = 50; /* use default */ 323 qlimit(cl->cl_q) = qlimit; 324 qtype(cl->cl_q) = Q_DROPTAIL; 325 qlen(cl->cl_q) = 0; 326 cl->cl_flags = flags; 327 cl->cl_pri = pri; 328 if (pri > pif->pif_maxpri) 329 pif->pif_maxpri = pri; 330 cl->cl_pif = pif; 331 cl->cl_handle = qid; 332 333 #ifdef ALTQ_RED 334 if (flags & (PRCF_RED|PRCF_RIO)) { 335 int red_flags, red_pkttime; 336 337 red_flags = 0; 338 if (flags & PRCF_ECN) 339 red_flags |= REDF_ECN; 340 #ifdef ALTQ_RIO 341 if (flags & PRCF_CLEARDSCP) 342 red_flags |= RIOF_CLEARDSCP; 343 #endif 344 if (pif->pif_bandwidth < 8) 345 red_pkttime = 1000 * 1000 * 1000; /* 1 sec */ 346 else 347 red_pkttime = (int64_t)pif->pif_ifq->altq_ifp->if_mtu 348 * 1000 * 1000 * 1000 / (pif->pif_bandwidth / 8); 349 #ifdef ALTQ_RIO 350 if (flags & PRCF_RIO) { 351 cl->cl_red = (red_t *)rio_alloc(0, NULL, 352 red_flags, red_pkttime); 353 if (cl->cl_red != NULL) 354 qtype(cl->cl_q) = Q_RIO; 355 } else 356 #endif 357 if (flags & PRCF_RED) { 358 cl->cl_red = red_alloc(0, 0, 359 qlimit(cl->cl_q) * 10/100, 360 qlimit(cl->cl_q) * 30/100, 361 red_flags, red_pkttime); 362 if (cl->cl_red != NULL) 363 qtype(cl->cl_q) = Q_RED; 364 } 365 } 366 #endif /* ALTQ_RED */ 367 368 return (cl); 369 370 err_ret: 371 if (cl->cl_red != NULL) { 372 #ifdef ALTQ_RIO 373 if (q_is_rio(cl->cl_q)) 374 rio_destroy((rio_t *)cl->cl_red); 375 #endif 376 #ifdef ALTQ_RED 377 if (q_is_red(cl->cl_q)) 378 red_destroy(cl->cl_red); 379 #endif 380 } 381 if (cl->cl_q != NULL) 382 free(cl->cl_q, M_DEVBUF); 383 free(cl, M_DEVBUF); 384 return (NULL); 385 } 386 387 static int 388 priq_class_destroy(struct priq_class *cl) 389 { 390 struct priq_if *pif; 391 int s, pri; 392 393 s = splnet(); 394 395 #ifdef ALTQ3_CLFIER_COMPAT 396 /* delete filters referencing to this class */ 397 acc_discard_filters(&cl->cl_pif->pif_classifier, cl, 0); 398 #endif 399 400 if (!qempty(cl->cl_q)) 401 priq_purgeq(cl); 402 403 pif = cl->cl_pif; 404 pif->pif_classes[cl->cl_pri] = NULL; 405 if (pif->pif_maxpri == cl->cl_pri) { 406 for (pri = cl->cl_pri; pri >= 0; pri--) 407 if (pif->pif_classes[pri] != NULL) { 408 pif->pif_maxpri = pri; 409 break; 410 } 411 if (pri < 0) 412 pif->pif_maxpri = -1; 413 } 414 splx(s); 415 416 if (cl->cl_red != NULL) { 417 #ifdef ALTQ_RIO 418 if (q_is_rio(cl->cl_q)) 419 rio_destroy((rio_t *)cl->cl_red); 420 #endif 421 #ifdef ALTQ_RED 422 if (q_is_red(cl->cl_q)) 423 red_destroy(cl->cl_red); 424 #endif 425 } 426 free(cl->cl_q, M_DEVBUF); 427 free(cl, M_DEVBUF); 428 return (0); 429 } 430 431 /* 432 * priq_enqueue is an enqueue function to be registered to 433 * (*altq_enqueue) in struct ifaltq. 434 */ 435 static int 436 priq_enqueue(struct ifaltq *ifq, struct mbuf *m, struct altq_pktattr *pktattr) 437 { 438 struct priq_if *pif = (struct priq_if *)ifq->altq_disc; 439 struct priq_class *cl; 440 struct m_tag *t; 441 int len; 442 443 /* grab class set by classifier */ 444 if ((m->m_flags & M_PKTHDR) == 0) { 445 /* should not happen */ 446 printf("altq: packet for %s does not have pkthdr\n", 447 ifq->altq_ifp->if_xname); 448 m_freem(m); 449 return (ENOBUFS); 450 } 451 cl = NULL; 452 if ((t = m_tag_find(m, PACKET_TAG_PF_QID, NULL)) != NULL) 453 cl = clh_to_clp(pif, ((struct altq_tag *)(t+1))->qid); 454 #ifdef ALTQ3_COMPAT 455 else if ((ifq->altq_flags & ALTQF_CLASSIFY) && pktattr != NULL) 456 cl = pktattr->pattr_class; 457 #endif 458 if (cl == NULL) { 459 cl = pif->pif_default; 460 if (cl == NULL) { 461 m_freem(m); 462 return (ENOBUFS); 463 } 464 } 465 #ifdef ALTQ3_COMPAT 466 if (pktattr != NULL) 467 cl->cl_pktattr = pktattr; /* save proto hdr used by ECN */ 468 else 469 #endif 470 cl->cl_pktattr = NULL; 471 len = m_pktlen(m); 472 if (priq_addq(cl, m) != 0) { 473 /* drop occurred. mbuf was freed in priq_addq. */ 474 PKTCNTR_ADD(&cl->cl_dropcnt, len); 475 return (ENOBUFS); 476 } 477 IFQ_INC_LEN(ifq); 478 479 /* successfully queued. */ 480 return (0); 481 } 482 483 /* 484 * priq_dequeue is a dequeue function to be registered to 485 * (*altq_dequeue) in struct ifaltq. 486 * 487 * note: ALTDQ_POLL returns the next packet without removing the packet 488 * from the queue. ALTDQ_REMOVE is a normal dequeue operation. 489 * ALTDQ_REMOVE must return the same packet if called immediately 490 * after ALTDQ_POLL. 491 */ 492 static struct mbuf * 493 priq_dequeue(struct ifaltq *ifq, int op) 494 { 495 struct priq_if *pif = (struct priq_if *)ifq->altq_disc; 496 struct priq_class *cl; 497 struct mbuf *m; 498 int pri; 499 500 if (IFQ_IS_EMPTY(ifq)) 501 /* no packet in the queue */ 502 return (NULL); 503 504 for (pri = pif->pif_maxpri; pri >= 0; pri--) { 505 if ((cl = pif->pif_classes[pri]) != NULL && 506 !qempty(cl->cl_q)) { 507 if (op == ALTDQ_POLL) 508 return (priq_pollq(cl)); 509 510 m = priq_getq(cl); 511 if (m != NULL) { 512 IFQ_DEC_LEN(ifq); 513 if (qempty(cl->cl_q)) 514 cl->cl_period++; 515 PKTCNTR_ADD(&cl->cl_xmitcnt, m_pktlen(m)); 516 } 517 return (m); 518 } 519 } 520 return (NULL); 521 } 522 523 static int 524 priq_addq(struct priq_class *cl, struct mbuf *m) 525 { 526 527 #ifdef ALTQ_RIO 528 if (q_is_rio(cl->cl_q)) 529 return rio_addq((rio_t *)cl->cl_red, cl->cl_q, m, 530 cl->cl_pktattr); 531 #endif 532 #ifdef ALTQ_RED 533 if (q_is_red(cl->cl_q)) 534 return red_addq(cl->cl_red, cl->cl_q, m, cl->cl_pktattr); 535 #endif 536 if (qlen(cl->cl_q) >= qlimit(cl->cl_q)) { 537 m_freem(m); 538 return (-1); 539 } 540 541 if (cl->cl_flags & PRCF_CLEARDSCP) 542 write_dsfield(m, cl->cl_pktattr, 0); 543 544 _addq(cl->cl_q, m); 545 546 return (0); 547 } 548 549 static struct mbuf * 550 priq_getq(struct priq_class *cl) 551 { 552 #ifdef ALTQ_RIO 553 if (q_is_rio(cl->cl_q)) 554 return rio_getq((rio_t *)cl->cl_red, cl->cl_q); 555 #endif 556 #ifdef ALTQ_RED 557 if (q_is_red(cl->cl_q)) 558 return red_getq(cl->cl_red, cl->cl_q); 559 #endif 560 return _getq(cl->cl_q); 561 } 562 563 static struct mbuf * 564 priq_pollq(cl) 565 struct priq_class *cl; 566 { 567 return qhead(cl->cl_q); 568 } 569 570 static void 571 priq_purgeq(struct priq_class *cl) 572 { 573 struct mbuf *m; 574 575 if (qempty(cl->cl_q)) 576 return; 577 578 while ((m = _getq(cl->cl_q)) != NULL) { 579 PKTCNTR_ADD(&cl->cl_dropcnt, m_pktlen(m)); 580 m_freem(m); 581 } 582 ASSERT(qlen(cl->cl_q) == 0); 583 } 584 585 static void 586 get_class_stats(struct priq_classstats *sp, struct priq_class *cl) 587 { 588 sp->class_handle = cl->cl_handle; 589 sp->qlength = qlen(cl->cl_q); 590 sp->qlimit = qlimit(cl->cl_q); 591 sp->period = cl->cl_period; 592 sp->xmitcnt = cl->cl_xmitcnt; 593 sp->dropcnt = cl->cl_dropcnt; 594 595 sp->qtype = qtype(cl->cl_q); 596 #ifdef ALTQ_RED 597 if (q_is_red(cl->cl_q)) 598 red_getstats(cl->cl_red, &sp->red[0]); 599 #endif 600 #ifdef ALTQ_RIO 601 if (q_is_rio(cl->cl_q)) 602 rio_getstats((rio_t *)cl->cl_red, &sp->red[0]); 603 #endif 604 605 } 606 607 /* convert a class handle to the corresponding class pointer */ 608 static struct priq_class * 609 clh_to_clp(struct priq_if *pif, u_int32_t chandle) 610 { 611 struct priq_class *cl; 612 int idx; 613 614 if (chandle == 0) 615 return (NULL); 616 617 for (idx = pif->pif_maxpri; idx >= 0; idx--) 618 if ((cl = pif->pif_classes[idx]) != NULL && 619 cl->cl_handle == chandle) 620 return (cl); 621 622 return (NULL); 623 } 624 625 626 #ifdef ALTQ3_COMPAT 627 628 static struct priq_if * 629 priq_attach(struct ifaltq *ifq, u_int bandwidth) 630 { 631 struct priq_if *pif; 632 633 pif = malloc(sizeof(struct priq_if), M_DEVBUF, M_WAITOK|M_ZERO); 634 if (pif == NULL) 635 return (NULL); 636 pif->pif_bandwidth = bandwidth; 637 pif->pif_maxpri = -1; 638 pif->pif_ifq = ifq; 639 640 /* add this state to the priq list */ 641 pif->pif_next = pif_list; 642 pif_list = pif; 643 644 return (pif); 645 } 646 647 static int 648 priq_detach(struct priq_if *pif) 649 { 650 (void)priq_clear_interface(pif); 651 652 /* remove this interface from the pif list */ 653 if (pif_list == pif) 654 pif_list = pif->pif_next; 655 else { 656 struct priq_if *p; 657 658 for (p = pif_list; p != NULL; p = p->pif_next) 659 if (p->pif_next == pif) { 660 p->pif_next = pif->pif_next; 661 break; 662 } 663 ASSERT(p != NULL); 664 } 665 666 free(pif, M_DEVBUF); 667 return (0); 668 } 669 670 /* 671 * priq device interface 672 */ 673 int 674 priqopen(dev_t dev __unused, int flag __unused, int fmt __unused, 675 struct lwp *l __unused) 676 { 677 /* everything will be done when the queueing scheme is attached. */ 678 return 0; 679 } 680 681 int 682 priqclose(dev_t dev __unused, int flag __unused, int fmt __unused, 683 struct lwp *l __unused) 684 { 685 struct priq_if *pif; 686 int err, error = 0; 687 688 while ((pif = pif_list) != NULL) { 689 /* destroy all */ 690 if (ALTQ_IS_ENABLED(pif->pif_ifq)) 691 altq_disable(pif->pif_ifq); 692 693 err = altq_detach(pif->pif_ifq); 694 if (err == 0) 695 err = priq_detach(pif); 696 if (err != 0 && error == 0) 697 error = err; 698 } 699 700 return error; 701 } 702 703 int 704 priqioctl(dev_t dev __unused, ioctlcmd_t cmd, caddr_t addr, int flag __unused, 705 struct lwp *l) 706 { 707 struct priq_if *pif; 708 struct priq_interface *ifacep; 709 int error = 0; 710 711 /* check super-user privilege */ 712 switch (cmd) { 713 case PRIQ_GETSTATS: 714 break; 715 default: 716 #if (__FreeBSD_version > 400000) 717 if ((error = suser(p)) != 0) 718 return (error); 719 #else 720 if ((error = kauth_authorize_generic(l->l_cred, 721 KAUTH_GENERIC_ISSUSER, &l->l_acflag)) != 0) 722 return (error); 723 #endif 724 break; 725 } 726 727 switch (cmd) { 728 729 case PRIQ_IF_ATTACH: 730 error = priqcmd_if_attach((struct priq_interface *)addr); 731 break; 732 733 case PRIQ_IF_DETACH: 734 error = priqcmd_if_detach((struct priq_interface *)addr); 735 break; 736 737 case PRIQ_ENABLE: 738 case PRIQ_DISABLE: 739 case PRIQ_CLEAR: 740 ifacep = (struct priq_interface *)addr; 741 if ((pif = altq_lookup(ifacep->ifname, 742 ALTQT_PRIQ)) == NULL) { 743 error = EBADF; 744 break; 745 } 746 747 switch (cmd) { 748 case PRIQ_ENABLE: 749 if (pif->pif_default == NULL) { 750 #ifdef ALTQ_DEBUG 751 printf("priq: no default class\n"); 752 #endif 753 error = EINVAL; 754 break; 755 } 756 error = altq_enable(pif->pif_ifq); 757 break; 758 759 case PRIQ_DISABLE: 760 error = altq_disable(pif->pif_ifq); 761 break; 762 763 case PRIQ_CLEAR: 764 priq_clear_interface(pif); 765 break; 766 } 767 break; 768 769 case PRIQ_ADD_CLASS: 770 error = priqcmd_add_class((struct priq_add_class *)addr); 771 break; 772 773 case PRIQ_DEL_CLASS: 774 error = priqcmd_delete_class((struct priq_delete_class *)addr); 775 break; 776 777 case PRIQ_MOD_CLASS: 778 error = priqcmd_modify_class((struct priq_modify_class *)addr); 779 break; 780 781 case PRIQ_ADD_FILTER: 782 error = priqcmd_add_filter((struct priq_add_filter *)addr); 783 break; 784 785 case PRIQ_DEL_FILTER: 786 error = priqcmd_delete_filter((struct priq_delete_filter *)addr); 787 break; 788 789 case PRIQ_GETSTATS: 790 error = priqcmd_class_stats((struct priq_class_stats *)addr); 791 break; 792 793 default: 794 error = EINVAL; 795 break; 796 } 797 return error; 798 } 799 800 static int 801 priqcmd_if_attach(struct priq_interface *ap) 802 { 803 struct priq_if *pif; 804 struct ifnet *ifp; 805 int error; 806 807 if ((ifp = ifunit(ap->ifname)) == NULL) 808 return (ENXIO); 809 810 if ((pif = priq_attach(&ifp->if_snd, ap->arg)) == NULL) 811 return (ENOMEM); 812 813 /* 814 * set PRIQ to this ifnet structure. 815 */ 816 if ((error = altq_attach(&ifp->if_snd, ALTQT_PRIQ, pif, 817 priq_enqueue, priq_dequeue, priq_request, 818 &pif->pif_classifier, acc_classify)) != 0) 819 (void)priq_detach(pif); 820 821 return (error); 822 } 823 824 static int 825 priqcmd_if_detach(struct priq_interface *ap) 826 { 827 struct priq_if *pif; 828 int error; 829 830 if ((pif = altq_lookup(ap->ifname, ALTQT_PRIQ)) == NULL) 831 return (EBADF); 832 833 if (ALTQ_IS_ENABLED(pif->pif_ifq)) 834 altq_disable(pif->pif_ifq); 835 836 if ((error = altq_detach(pif->pif_ifq))) 837 return (error); 838 839 return priq_detach(pif); 840 } 841 842 static int 843 priqcmd_add_class(struct priq_add_class *ap) 844 { 845 struct priq_if *pif; 846 struct priq_class *cl; 847 int qid; 848 849 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 850 return (EBADF); 851 852 if (ap->pri < 0 || ap->pri >= PRIQ_MAXPRI) 853 return (EINVAL); 854 if (pif->pif_classes[ap->pri] != NULL) 855 return (EBUSY); 856 857 qid = ap->pri + 1; 858 if ((cl = priq_class_create(pif, ap->pri, 859 ap->qlimit, ap->flags, qid)) == NULL) 860 return (ENOMEM); 861 862 /* return a class handle to the user */ 863 ap->class_handle = cl->cl_handle; 864 865 return (0); 866 } 867 868 static int 869 priqcmd_delete_class(struct priq_delete_class *ap) 870 { 871 struct priq_if *pif; 872 struct priq_class *cl; 873 874 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 875 return (EBADF); 876 877 if ((cl = clh_to_clp(pif, ap->class_handle)) == NULL) 878 return (EINVAL); 879 880 return priq_class_destroy(cl); 881 } 882 883 static int 884 priqcmd_modify_class(struct priq_modify_class *ap) 885 { 886 struct priq_if *pif; 887 struct priq_class *cl; 888 889 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 890 return (EBADF); 891 892 if (ap->pri < 0 || ap->pri >= PRIQ_MAXPRI) 893 return (EINVAL); 894 895 if ((cl = clh_to_clp(pif, ap->class_handle)) == NULL) 896 return (EINVAL); 897 898 /* 899 * if priority is changed, move the class to the new priority 900 */ 901 if (pif->pif_classes[ap->pri] != cl) { 902 if (pif->pif_classes[ap->pri] != NULL) 903 return (EEXIST); 904 pif->pif_classes[cl->cl_pri] = NULL; 905 pif->pif_classes[ap->pri] = cl; 906 cl->cl_pri = ap->pri; 907 } 908 909 /* call priq_class_create to change class parameters */ 910 if ((cl = priq_class_create(pif, ap->pri, 911 ap->qlimit, ap->flags, ap->class_handle)) == NULL) 912 return (ENOMEM); 913 return 0; 914 } 915 916 static int 917 priqcmd_add_filter(struct priq_add_filter *ap) 918 { 919 struct priq_if *pif; 920 struct priq_class *cl; 921 922 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 923 return (EBADF); 924 925 if ((cl = clh_to_clp(pif, ap->class_handle)) == NULL) 926 return (EINVAL); 927 928 return acc_add_filter(&pif->pif_classifier, &ap->filter, 929 cl, &ap->filter_handle); 930 } 931 932 static int 933 priqcmd_delete_filter(struct priq_delete_filter *ap) 934 { 935 struct priq_if *pif; 936 937 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 938 return (EBADF); 939 940 return acc_delete_filter(&pif->pif_classifier, 941 ap->filter_handle); 942 } 943 944 static int 945 priqcmd_class_stats(struct priq_class_stats *ap) 946 { 947 struct priq_if *pif; 948 struct priq_class *cl; 949 struct priq_classstats stats, *usp; 950 int pri, error; 951 952 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 953 return (EBADF); 954 955 ap->maxpri = pif->pif_maxpri; 956 957 /* then, read the next N classes in the tree */ 958 usp = ap->stats; 959 for (pri = 0; pri <= pif->pif_maxpri; pri++) { 960 cl = pif->pif_classes[pri]; 961 if (cl != NULL) 962 get_class_stats(&stats, cl); 963 else 964 memset(&stats, 0, sizeof(stats)); 965 if ((error = copyout((caddr_t)&stats, (caddr_t)usp++, 966 sizeof(stats))) != 0) 967 return (error); 968 } 969 return (0); 970 } 971 972 #ifdef KLD_MODULE 973 974 static struct altqsw priq_sw = 975 {"priq", priqopen, priqclose, priqioctl}; 976 977 ALTQ_MODULE(altq_priq, ALTQT_PRIQ, &priq_sw); 978 MODULE_DEPEND(altq_priq, altq_red, 1, 1, 1); 979 MODULE_DEPEND(altq_priq, altq_rio, 1, 1, 1); 980 981 #endif /* KLD_MODULE */ 982 983 #endif /* ALTQ3_COMPAT */ 984 #endif /* ALTQ_PRIQ */ 985
Indexes created Tue Sep 30 20:09:53 GMT 2025