altq_priq.c revision 1.24
1 /* $NetBSD: altq_priq.c,v 1.24 2017/07/28 13:53:17 riastradh 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 1.24 2017/07/28 13:53:17 riastradh 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 goto err_ret; 322 } 323 324 pif->pif_classes[pri] = cl; 325 if (flags & PRCF_DEFAULTCLASS) 326 pif->pif_default = cl; 327 if (qlimit == 0) 328 qlimit = 50; /* use default */ 329 qlimit(cl->cl_q) = qlimit; 330 qtype(cl->cl_q) = Q_DROPTAIL; 331 qlen(cl->cl_q) = 0; 332 cl->cl_flags = flags; 333 cl->cl_pri = pri; 334 if (pri > pif->pif_maxpri) 335 pif->pif_maxpri = pri; 336 cl->cl_pif = pif; 337 cl->cl_handle = qid; 338 339 #ifdef ALTQ_RED 340 if (flags & (PRCF_RED|PRCF_RIO)) { 341 int red_flags, red_pkttime; 342 343 red_flags = 0; 344 if (flags & PRCF_ECN) 345 red_flags |= REDF_ECN; 346 #ifdef ALTQ_RIO 347 if (flags & PRCF_CLEARDSCP) 348 red_flags |= RIOF_CLEARDSCP; 349 #endif 350 if (pif->pif_bandwidth < 8) 351 red_pkttime = 1000 * 1000 * 1000; /* 1 sec */ 352 else 353 red_pkttime = (int64_t)pif->pif_ifq->altq_ifp->if_mtu 354 * 1000 * 1000 * 1000 / (pif->pif_bandwidth / 8); 355 #ifdef ALTQ_RIO 356 if (flags & PRCF_RIO) { 357 cl->cl_red = (red_t *)rio_alloc(0, NULL, 358 red_flags, red_pkttime); 359 if (cl->cl_red != NULL) 360 qtype(cl->cl_q) = Q_RIO; 361 } else 362 #endif 363 if (flags & PRCF_RED) { 364 cl->cl_red = red_alloc(0, 0, 365 qlimit(cl->cl_q) * 10/100, 366 qlimit(cl->cl_q) * 30/100, 367 red_flags, red_pkttime); 368 if (cl->cl_red != NULL) 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(); 400 401 #ifdef ALTQ3_CLFIER_COMPAT 402 /* delete filters referencing to this class */ 403 acc_discard_filters(&cl->cl_pif->pif_classifier, cl, 0); 404 #endif 405 406 if (!qempty(cl->cl_q)) 407 priq_purgeq(cl); 408 409 pif = cl->cl_pif; 410 pif->pif_classes[cl->cl_pri] = NULL; 411 if (pif->pif_maxpri == cl->cl_pri) { 412 for (pri = cl->cl_pri; pri >= 0; pri--) 413 if (pif->pif_classes[pri] != NULL) { 414 pif->pif_maxpri = pri; 415 break; 416 } 417 if (pri < 0) 418 pif->pif_maxpri = -1; 419 } 420 splx(s); 421 422 if (cl->cl_red != NULL) { 423 #ifdef ALTQ_RIO 424 if (q_is_rio(cl->cl_q)) 425 rio_destroy((rio_t *)cl->cl_red); 426 #endif 427 #ifdef ALTQ_RED 428 if (q_is_red(cl->cl_q)) 429 red_destroy(cl->cl_red); 430 #endif 431 } 432 free(cl->cl_q, M_DEVBUF); 433 free(cl, M_DEVBUF); 434 return (0); 435 } 436 437 /* 438 * priq_enqueue is an enqueue function to be registered to 439 * (*altq_enqueue) in struct ifaltq. 440 */ 441 static int 442 priq_enqueue(struct ifaltq *ifq, struct mbuf *m) 443 { 444 struct altq_pktattr pktattr; 445 struct priq_if *pif = (struct priq_if *)ifq->altq_disc; 446 struct priq_class *cl; 447 struct m_tag *t; 448 int len; 449 450 /* grab class set by classifier */ 451 if ((m->m_flags & M_PKTHDR) == 0) { 452 /* should not happen */ 453 printf("altq: packet for %s does not have pkthdr\n", 454 ifq->altq_ifp->if_xname); 455 m_freem(m); 456 return (ENOBUFS); 457 } 458 cl = NULL; 459 if ((t = m_tag_find(m, PACKET_TAG_ALTQ_QID, NULL)) != NULL) 460 cl = clh_to_clp(pif, ((struct altq_tag *)(t+1))->qid); 461 #ifdef ALTQ3_COMPAT 462 else if (ifq->altq_flags & ALTQF_CLASSIFY) 463 cl = m->m_pkthdr.pattr_class; 464 #endif 465 if (cl == NULL) { 466 cl = pif->pif_default; 467 if (cl == NULL) { 468 m_freem(m); 469 return (ENOBUFS); 470 } 471 } 472 #ifdef ALTQ3_COMPAT 473 if (m->m_pkthdr.pattr_af != AF_UNSPEC) { 474 pktattr.pattr_class = m->m_pkthdr.pattr_class; 475 pktattr.pattr_af = m->m_pkthdr.pattr_af; 476 pktattr.pattr_hdr = m->m_pkthdr.pattr_hdr; 477 478 cl->cl_pktattr = &pktattr; /* save proto hdr used by ECN */ 479 } else 480 #endif 481 cl->cl_pktattr = NULL; 482 len = m_pktlen(m); 483 if (priq_addq(cl, m) != 0) { 484 /* drop occurred. mbuf was freed in priq_addq. */ 485 PKTCNTR_ADD(&cl->cl_dropcnt, len); 486 return (ENOBUFS); 487 } 488 IFQ_INC_LEN(ifq); 489 490 /* successfully queued. */ 491 return (0); 492 } 493 494 /* 495 * priq_dequeue is a dequeue function to be registered to 496 * (*altq_dequeue) in struct ifaltq. 497 * 498 * note: ALTDQ_POLL returns the next packet without removing the packet 499 * from the queue. ALTDQ_REMOVE is a normal dequeue operation. 500 * ALTDQ_REMOVE must return the same packet if called immediately 501 * after ALTDQ_POLL. 502 */ 503 static struct mbuf * 504 priq_dequeue(struct ifaltq *ifq, int op) 505 { 506 struct priq_if *pif = (struct priq_if *)ifq->altq_disc; 507 struct priq_class *cl; 508 struct mbuf *m; 509 int pri; 510 511 if (IFQ_IS_EMPTY(ifq)) 512 /* no packet in the queue */ 513 return (NULL); 514 515 for (pri = pif->pif_maxpri; pri >= 0; pri--) { 516 if ((cl = pif->pif_classes[pri]) != NULL && 517 !qempty(cl->cl_q)) { 518 if (op == ALTDQ_POLL) 519 return (priq_pollq(cl)); 520 521 m = priq_getq(cl); 522 if (m != NULL) { 523 IFQ_DEC_LEN(ifq); 524 if (qempty(cl->cl_q)) 525 cl->cl_period++; 526 PKTCNTR_ADD(&cl->cl_xmitcnt, m_pktlen(m)); 527 } 528 return (m); 529 } 530 } 531 return (NULL); 532 } 533 534 static int 535 priq_addq(struct priq_class *cl, struct mbuf *m) 536 { 537 538 #ifdef ALTQ_RIO 539 if (q_is_rio(cl->cl_q)) 540 return rio_addq((rio_t *)cl->cl_red, cl->cl_q, m, 541 cl->cl_pktattr); 542 #endif 543 #ifdef ALTQ_RED 544 if (q_is_red(cl->cl_q)) 545 return red_addq(cl->cl_red, cl->cl_q, m, cl->cl_pktattr); 546 #endif 547 if (qlen(cl->cl_q) >= qlimit(cl->cl_q)) { 548 m_freem(m); 549 return (-1); 550 } 551 552 if (cl->cl_flags & PRCF_CLEARDSCP) 553 write_dsfield(m, cl->cl_pktattr, 0); 554 555 _addq(cl->cl_q, m); 556 557 return (0); 558 } 559 560 static struct mbuf * 561 priq_getq(struct priq_class *cl) 562 { 563 #ifdef ALTQ_RIO 564 if (q_is_rio(cl->cl_q)) 565 return rio_getq((rio_t *)cl->cl_red, cl->cl_q); 566 #endif 567 #ifdef ALTQ_RED 568 if (q_is_red(cl->cl_q)) 569 return red_getq(cl->cl_red, cl->cl_q); 570 #endif 571 return _getq(cl->cl_q); 572 } 573 574 static struct mbuf * 575 priq_pollq(struct priq_class *cl) 576 { 577 return qhead(cl->cl_q); 578 } 579 580 static void 581 priq_purgeq(struct priq_class *cl) 582 { 583 struct mbuf *m; 584 585 if (qempty(cl->cl_q)) 586 return; 587 588 while ((m = _getq(cl->cl_q)) != NULL) { 589 PKTCNTR_ADD(&cl->cl_dropcnt, m_pktlen(m)); 590 m_freem(m); 591 } 592 ASSERT(qlen(cl->cl_q) == 0); 593 } 594 595 static void 596 get_class_stats(struct priq_classstats *sp, struct priq_class *cl) 597 { 598 sp->class_handle = cl->cl_handle; 599 sp->qlength = qlen(cl->cl_q); 600 sp->qlimit = qlimit(cl->cl_q); 601 sp->period = cl->cl_period; 602 sp->xmitcnt = cl->cl_xmitcnt; 603 sp->dropcnt = cl->cl_dropcnt; 604 605 sp->qtype = qtype(cl->cl_q); 606 #ifdef ALTQ_RED 607 if (q_is_red(cl->cl_q)) 608 red_getstats(cl->cl_red, &sp->red[0]); 609 #endif 610 #ifdef ALTQ_RIO 611 if (q_is_rio(cl->cl_q)) 612 rio_getstats((rio_t *)cl->cl_red, &sp->red[0]); 613 #endif 614 615 } 616 617 /* convert a class handle to the corresponding class pointer */ 618 static struct priq_class * 619 clh_to_clp(struct priq_if *pif, u_int32_t chandle) 620 { 621 struct priq_class *cl; 622 int idx; 623 624 if (chandle == 0) 625 return (NULL); 626 627 for (idx = pif->pif_maxpri; idx >= 0; idx--) 628 if ((cl = pif->pif_classes[idx]) != NULL && 629 cl->cl_handle == chandle) 630 return (cl); 631 632 return (NULL); 633 } 634 635 636 #ifdef ALTQ3_COMPAT 637 638 static struct priq_if * 639 priq_attach(struct ifaltq *ifq, u_int bandwidth) 640 { 641 struct priq_if *pif; 642 643 pif = malloc(sizeof(struct priq_if), M_DEVBUF, M_WAITOK|M_ZERO); 644 if (pif == NULL) 645 return (NULL); 646 pif->pif_bandwidth = bandwidth; 647 pif->pif_maxpri = -1; 648 pif->pif_ifq = ifq; 649 650 /* add this state to the priq list */ 651 pif->pif_next = pif_list; 652 pif_list = pif; 653 654 return (pif); 655 } 656 657 static void 658 priq_detach(struct priq_if *pif) 659 { 660 (void)priq_clear_interface(pif); 661 662 /* remove this interface from the pif list */ 663 if (pif_list == pif) 664 pif_list = pif->pif_next; 665 else { 666 struct priq_if *p; 667 668 for (p = pif_list; p != NULL; p = p->pif_next) 669 if (p->pif_next == pif) { 670 p->pif_next = pif->pif_next; 671 break; 672 } 673 ASSERT(p != NULL); 674 } 675 676 free(pif, M_DEVBUF); 677 } 678 679 /* 680 * priq device interface 681 */ 682 int 683 priqopen(dev_t dev, int flag, int fmt, 684 struct lwp *l) 685 { 686 /* everything will be done when the queueing scheme is attached. */ 687 return 0; 688 } 689 690 int 691 priqclose(dev_t dev, int flag, int fmt, 692 struct lwp *l) 693 { 694 struct priq_if *pif; 695 696 while ((pif = pif_list) != NULL) { 697 /* destroy all */ 698 if (ALTQ_IS_ENABLED(pif->pif_ifq)) 699 altq_disable(pif->pif_ifq); 700 701 int error = altq_detach(pif->pif_ifq); 702 switch (error) { 703 case 0: 704 case ENXIO: /* already disabled */ 705 break; 706 default: 707 return error; 708 } 709 priq_detach(pif); 710 } 711 712 return 0; 713 } 714 715 int 716 priqioctl(dev_t dev, ioctlcmd_t cmd, void *addr, int flag, 717 struct lwp *l) 718 { 719 struct priq_if *pif; 720 struct priq_interface *ifacep; 721 int error = 0; 722 723 /* check super-user privilege */ 724 switch (cmd) { 725 case PRIQ_GETSTATS: 726 break; 727 default: 728 #if (__FreeBSD_version > 400000) 729 if ((error = suser(p)) != 0) 730 return (error); 731 #else 732 if ((error = kauth_authorize_network(l->l_cred, 733 KAUTH_NETWORK_ALTQ, KAUTH_REQ_NETWORK_ALTQ_PRIQ, NULL, 734 NULL, NULL)) != 0) 735 return (error); 736 #endif 737 break; 738 } 739 740 switch (cmd) { 741 742 case PRIQ_IF_ATTACH: 743 error = priqcmd_if_attach((struct priq_interface *)addr); 744 break; 745 746 case PRIQ_IF_DETACH: 747 error = priqcmd_if_detach((struct priq_interface *)addr); 748 break; 749 750 case PRIQ_ENABLE: 751 case PRIQ_DISABLE: 752 case PRIQ_CLEAR: 753 ifacep = (struct priq_interface *)addr; 754 if ((pif = altq_lookup(ifacep->ifname, 755 ALTQT_PRIQ)) == NULL) { 756 error = EBADF; 757 break; 758 } 759 760 switch (cmd) { 761 case PRIQ_ENABLE: 762 if (pif->pif_default == NULL) { 763 #ifdef ALTQ_DEBUG 764 printf("priq: no default class\n"); 765 #endif 766 error = EINVAL; 767 break; 768 } 769 error = altq_enable(pif->pif_ifq); 770 break; 771 772 case PRIQ_DISABLE: 773 error = altq_disable(pif->pif_ifq); 774 break; 775 776 case PRIQ_CLEAR: 777 priq_clear_interface(pif); 778 break; 779 } 780 break; 781 782 case PRIQ_ADD_CLASS: 783 error = priqcmd_add_class((struct priq_add_class *)addr); 784 break; 785 786 case PRIQ_DEL_CLASS: 787 error = priqcmd_delete_class((struct priq_delete_class *)addr); 788 break; 789 790 case PRIQ_MOD_CLASS: 791 error = priqcmd_modify_class((struct priq_modify_class *)addr); 792 break; 793 794 case PRIQ_ADD_FILTER: 795 error = priqcmd_add_filter((struct priq_add_filter *)addr); 796 break; 797 798 case PRIQ_DEL_FILTER: 799 error = priqcmd_delete_filter((struct priq_delete_filter *)addr); 800 break; 801 802 case PRIQ_GETSTATS: 803 error = priqcmd_class_stats((struct priq_class_stats *)addr); 804 break; 805 806 default: 807 error = EINVAL; 808 break; 809 } 810 return error; 811 } 812 813 static int 814 priqcmd_if_attach(struct priq_interface *ap) 815 { 816 struct priq_if *pif; 817 struct ifnet *ifp; 818 int error; 819 820 if ((ifp = ifunit(ap->ifname)) == NULL) 821 return (ENXIO); 822 823 if ((pif = priq_attach(&ifp->if_snd, ap->arg)) == NULL) 824 return (ENOMEM); 825 826 /* 827 * set PRIQ to this ifnet structure. 828 */ 829 if ((error = altq_attach(&ifp->if_snd, ALTQT_PRIQ, pif, 830 priq_enqueue, priq_dequeue, priq_request, 831 &pif->pif_classifier, acc_classify)) != 0) 832 priq_detach(pif); 833 834 return (error); 835 } 836 837 static int 838 priqcmd_if_detach(struct priq_interface *ap) 839 { 840 struct priq_if *pif; 841 int error; 842 843 if ((pif = altq_lookup(ap->ifname, ALTQT_PRIQ)) == NULL) 844 return (EBADF); 845 846 if (ALTQ_IS_ENABLED(pif->pif_ifq)) 847 altq_disable(pif->pif_ifq); 848 849 if ((error = altq_detach(pif->pif_ifq))) 850 return (error); 851 852 priq_detach(pif); 853 return 0; 854 } 855 856 static int 857 priqcmd_add_class(struct priq_add_class *ap) 858 { 859 struct priq_if *pif; 860 struct priq_class *cl; 861 int qid; 862 863 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 864 return (EBADF); 865 866 if (ap->pri < 0 || ap->pri >= PRIQ_MAXPRI) 867 return (EINVAL); 868 if (pif->pif_classes[ap->pri] != NULL) 869 return (EBUSY); 870 871 qid = ap->pri + 1; 872 if ((cl = priq_class_create(pif, ap->pri, 873 ap->qlimit, ap->flags, qid)) == NULL) 874 return (ENOMEM); 875 876 /* return a class handle to the user */ 877 ap->class_handle = cl->cl_handle; 878 879 return (0); 880 } 881 882 static int 883 priqcmd_delete_class(struct priq_delete_class *ap) 884 { 885 struct priq_if *pif; 886 struct priq_class *cl; 887 888 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 889 return (EBADF); 890 891 if ((cl = clh_to_clp(pif, ap->class_handle)) == NULL) 892 return (EINVAL); 893 894 return priq_class_destroy(cl); 895 } 896 897 static int 898 priqcmd_modify_class(struct priq_modify_class *ap) 899 { 900 struct priq_if *pif; 901 struct priq_class *cl; 902 903 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 904 return (EBADF); 905 906 if (ap->pri < 0 || ap->pri >= PRIQ_MAXPRI) 907 return (EINVAL); 908 909 if ((cl = clh_to_clp(pif, ap->class_handle)) == NULL) 910 return (EINVAL); 911 912 /* 913 * if priority is changed, move the class to the new priority 914 */ 915 if (pif->pif_classes[ap->pri] != cl) { 916 if (pif->pif_classes[ap->pri] != NULL) 917 return (EEXIST); 918 pif->pif_classes[cl->cl_pri] = NULL; 919 pif->pif_classes[ap->pri] = cl; 920 cl->cl_pri = ap->pri; 921 } 922 923 /* call priq_class_create to change class parameters */ 924 if ((cl = priq_class_create(pif, ap->pri, 925 ap->qlimit, ap->flags, ap->class_handle)) == NULL) 926 return (ENOMEM); 927 return 0; 928 } 929 930 static int 931 priqcmd_add_filter(struct priq_add_filter *ap) 932 { 933 struct priq_if *pif; 934 struct priq_class *cl; 935 936 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 937 return (EBADF); 938 939 if ((cl = clh_to_clp(pif, ap->class_handle)) == NULL) 940 return (EINVAL); 941 942 return acc_add_filter(&pif->pif_classifier, &ap->filter, 943 cl, &ap->filter_handle); 944 } 945 946 static int 947 priqcmd_delete_filter(struct priq_delete_filter *ap) 948 { 949 struct priq_if *pif; 950 951 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 952 return (EBADF); 953 954 return acc_delete_filter(&pif->pif_classifier, 955 ap->filter_handle); 956 } 957 958 static int 959 priqcmd_class_stats(struct priq_class_stats *ap) 960 { 961 struct priq_if *pif; 962 struct priq_class *cl; 963 struct priq_classstats stats, *usp; 964 int pri, error; 965 966 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 967 return (EBADF); 968 969 ap->maxpri = pif->pif_maxpri; 970 971 /* then, read the next N classes in the tree */ 972 usp = ap->stats; 973 for (pri = 0; pri <= pif->pif_maxpri; pri++) { 974 cl = pif->pif_classes[pri]; 975 if (cl != NULL) 976 get_class_stats(&stats, cl); 977 else 978 memset(&stats, 0, sizeof(stats)); 979 if ((error = copyout((void *)&stats, (void *)usp++, 980 sizeof(stats))) != 0) 981 return (error); 982 } 983 return (0); 984 } 985 986 #ifdef KLD_MODULE 987 988 static struct altqsw priq_sw = 989 {"priq", priqopen, priqclose, priqioctl}; 990 991 ALTQ_MODULE(altq_priq, ALTQT_PRIQ, &priq_sw); 992 MODULE_DEPEND(altq_priq, altq_red, 1, 1, 1); 993 MODULE_DEPEND(altq_priq, altq_rio, 1, 1, 1); 994 995 #endif /* KLD_MODULE */ 996 997 #endif /* ALTQ3_COMPAT */ 998 #endif /* ALTQ_PRIQ */ 999
Indexes created Mon Sep 29 21:09:56 GMT 2025