1 /*- 2 * Copyright (C) 2000-2003 3 * Sony Computer Science Laboratories Inc. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY SONY CSL AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL SONY CSL OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $KAME: altq_priq.c,v 1.11 2003/09/17 14:23:25 kjc Exp $ 27 * $FreeBSD$ 28 */ 29 /* 30 * priority queue 31 */ 32 33 #include "opt_altq.h" 34 #include "opt_inet.h" 35 #include "opt_inet6.h" 36 37 #ifdef ALTQ_PRIQ /* priq is enabled by ALTQ_PRIQ option in opt_altq.h */ 38 39 #include <sys/param.h> 40 #include <sys/malloc.h> 41 #include <sys/mbuf.h> 42 #include <sys/socket.h> 43 #include <sys/sockio.h> 44 #include <sys/systm.h> 45 #include <sys/proc.h> 46 #include <sys/errno.h> 47 #include <sys/kernel.h> 48 #include <sys/queue.h> 49 50 #include <net/if.h> 51 #include <net/if_var.h> 52 #include <netinet/in.h> 53 54 #include <netpfil/pf/pf.h> 55 #include <netpfil/pf/pf_altq.h> 56 #include <netpfil/pf/pf_mtag.h> 57 #include <net/altq/altq.h> 58 #ifdef ALTQ3_COMPAT 59 #include <net/altq/altq_conf.h> 60 #endif 61 #include <net/altq/altq_priq.h> 62 63 /* 64 * function prototypes 65 */ 66 #ifdef ALTQ3_COMPAT 67 static struct priq_if *priq_attach(struct ifaltq *, u_int); 68 static int priq_detach(struct priq_if *); 69 #endif 70 static int priq_clear_interface(struct priq_if *); 71 static int priq_request(struct ifaltq *, int, void *); 72 static void priq_purge(struct priq_if *); 73 static struct priq_class *priq_class_create(struct priq_if *, int, int, int, 74 int); 75 static int priq_class_destroy(struct priq_class *); 76 static int priq_enqueue(struct ifaltq *, struct mbuf *, struct altq_pktattr *); 77 static struct mbuf *priq_dequeue(struct ifaltq *, int); 78 79 static int priq_addq(struct priq_class *, struct mbuf *); 80 static struct mbuf *priq_getq(struct priq_class *); 81 static struct mbuf *priq_pollq(struct priq_class *); 82 static void priq_purgeq(struct priq_class *); 83 84 #ifdef ALTQ3_COMPAT 85 static int priqcmd_if_attach(struct priq_interface *); 86 static int priqcmd_if_detach(struct priq_interface *); 87 static int priqcmd_add_class(struct priq_add_class *); 88 static int priqcmd_delete_class(struct priq_delete_class *); 89 static int priqcmd_modify_class(struct priq_modify_class *); 90 static int priqcmd_add_filter(struct priq_add_filter *); 91 static int priqcmd_delete_filter(struct priq_delete_filter *); 92 static int priqcmd_class_stats(struct priq_class_stats *); 93 #endif /* ALTQ3_COMPAT */ 94 95 static void get_class_stats(struct priq_classstats *, struct priq_class *); 96 static struct priq_class *clh_to_clp(struct priq_if *, u_int32_t); 97 98 #ifdef ALTQ3_COMPAT 99 altqdev_decl(priq); 100 101 /* pif_list keeps all priq_if's allocated. */ 102 static struct priq_if *pif_list = NULL; 103 #endif /* ALTQ3_COMPAT */ 104 105 int 106 priq_pfattach(struct pf_altq *a) 107 { 108 struct ifnet *ifp; 109 int s, error; 110 111 if ((ifp = ifunit(a->ifname)) == NULL || a->altq_disc == NULL) 112 return (EINVAL); 113 s = splnet(); 114 error = altq_attach(&ifp->if_snd, ALTQT_PRIQ, a->altq_disc, 115 priq_enqueue, priq_dequeue, priq_request, NULL, NULL); 116 splx(s); 117 return (error); 118 } 119 120 int 121 priq_add_altq(struct pf_altq *a) 122 { 123 struct priq_if *pif; 124 struct ifnet *ifp; 125 126 if ((ifp = ifunit(a->ifname)) == NULL) 127 return (EINVAL); 128 if (!ALTQ_IS_READY(&ifp->if_snd)) 129 return (ENODEV); 130 131 pif = malloc(sizeof(struct priq_if), M_DEVBUF, M_NOWAIT | M_ZERO); 132 if (pif == NULL) 133 return (ENOMEM); 134 pif->pif_bandwidth = a->ifbandwidth; 135 pif->pif_maxpri = -1; 136 pif->pif_ifq = &ifp->if_snd; 137 138 /* keep the state in pf_altq */ 139 a->altq_disc = pif; 140 141 return (0); 142 } 143 144 int 145 priq_remove_altq(struct pf_altq *a) 146 { 147 struct priq_if *pif; 148 149 if ((pif = a->altq_disc) == NULL) 150 return (EINVAL); 151 a->altq_disc = NULL; 152 153 (void)priq_clear_interface(pif); 154 155 free(pif, M_DEVBUF); 156 return (0); 157 } 158 159 int 160 priq_add_queue(struct pf_altq *a) 161 { 162 struct priq_if *pif; 163 struct priq_class *cl; 164 165 if ((pif = a->altq_disc) == NULL) 166 return (EINVAL); 167 168 /* check parameters */ 169 if (a->priority >= PRIQ_MAXPRI) 170 return (EINVAL); 171 if (a->qid == 0) 172 return (EINVAL); 173 if (pif->pif_classes[a->priority] != NULL) 174 return (EBUSY); 175 if (clh_to_clp(pif, a->qid) != NULL) 176 return (EBUSY); 177 178 cl = priq_class_create(pif, a->priority, a->qlimit, 179 a->pq_u.priq_opts.flags, a->qid); 180 if (cl == NULL) 181 return (ENOMEM); 182 183 return (0); 184 } 185 186 int 187 priq_remove_queue(struct pf_altq *a) 188 { 189 struct priq_if *pif; 190 struct priq_class *cl; 191 192 if ((pif = a->altq_disc) == NULL) 193 return (EINVAL); 194 195 if ((cl = clh_to_clp(pif, a->qid)) == NULL) 196 return (EINVAL); 197 198 return (priq_class_destroy(cl)); 199 } 200 201 int 202 priq_getqstats(struct pf_altq *a, void *ubuf, int *nbytes) 203 { 204 struct priq_if *pif; 205 struct priq_class *cl; 206 struct priq_classstats stats; 207 int error = 0; 208 209 if ((pif = altq_lookup(a->ifname, ALTQT_PRIQ)) == NULL) 210 return (EBADF); 211 212 if ((cl = clh_to_clp(pif, a->qid)) == NULL) 213 return (EINVAL); 214 215 if (*nbytes < sizeof(stats)) 216 return (EINVAL); 217 218 get_class_stats(&stats, cl); 219 220 if ((error = copyout((caddr_t)&stats, ubuf, sizeof(stats))) != 0) 221 return (error); 222 *nbytes = sizeof(stats); 223 return (0); 224 } 225 226 /* 227 * bring the interface back to the initial state by discarding 228 * all the filters and classes. 229 */ 230 static int 231 priq_clear_interface(struct priq_if *pif) 232 { 233 struct priq_class *cl; 234 int pri; 235 236 #ifdef ALTQ3_CLFIER_COMPAT 237 /* free the filters for this interface */ 238 acc_discard_filters(&pif->pif_classifier, NULL, 1); 239 #endif 240 241 /* clear out the classes */ 242 for (pri = 0; pri <= pif->pif_maxpri; pri++) 243 if ((cl = pif->pif_classes[pri]) != NULL) 244 priq_class_destroy(cl); 245 246 return (0); 247 } 248 249 static int 250 priq_request(struct ifaltq *ifq, int req, void *arg) 251 { 252 struct priq_if *pif = (struct priq_if *)ifq->altq_disc; 253 254 IFQ_LOCK_ASSERT(ifq); 255 256 switch (req) { 257 case ALTRQ_PURGE: 258 priq_purge(pif); 259 break; 260 } 261 return (0); 262 } 263 264 /* discard all the queued packets on the interface */ 265 static void 266 priq_purge(struct priq_if *pif) 267 { 268 struct priq_class *cl; 269 int pri; 270 271 for (pri = 0; pri <= pif->pif_maxpri; pri++) { 272 if ((cl = pif->pif_classes[pri]) != NULL && !qempty(cl->cl_q)) 273 priq_purgeq(cl); 274 } 275 if (ALTQ_IS_ENABLED(pif->pif_ifq)) 276 pif->pif_ifq->ifq_len = 0; 277 } 278 279 static struct priq_class * 280 priq_class_create(struct priq_if *pif, int pri, int qlimit, int flags, int qid) 281 { 282 struct priq_class *cl; 283 int s; 284 285 #ifndef ALTQ_RED 286 if (flags & PRCF_RED) { 287 #ifdef ALTQ_DEBUG 288 printf("priq_class_create: RED not configured for PRIQ!\n"); 289 #endif 290 return (NULL); 291 } 292 #endif 293 #ifndef ALTQ_CODEL 294 if (flags & PRCF_CODEL) { 295 #ifdef ALTQ_DEBUG 296 printf("priq_class_create: CODEL not configured for PRIQ!\n"); 297 #endif 298 return (NULL); 299 } 300 #endif 301 302 if ((cl = pif->pif_classes[pri]) != NULL) { 303 /* modify the class instead of creating a new one */ 304 s = splnet(); 305 IFQ_LOCK(cl->cl_pif->pif_ifq); 306 if (!qempty(cl->cl_q)) 307 priq_purgeq(cl); 308 IFQ_UNLOCK(cl->cl_pif->pif_ifq); 309 splx(s); 310 #ifdef ALTQ_RIO 311 if (q_is_rio(cl->cl_q)) 312 rio_destroy((rio_t *)cl->cl_red); 313 #endif 314 #ifdef ALTQ_RED 315 if (q_is_red(cl->cl_q)) 316 red_destroy(cl->cl_red); 317 #endif 318 #ifdef ALTQ_CODEL 319 if (q_is_codel(cl->cl_q)) 320 codel_destroy(cl->cl_codel); 321 #endif 322 } else { 323 cl = malloc(sizeof(struct priq_class), M_DEVBUF, 324 M_NOWAIT | M_ZERO); 325 if (cl == NULL) 326 return (NULL); 327 328 cl->cl_q = malloc(sizeof(class_queue_t), M_DEVBUF, 329 M_NOWAIT | M_ZERO); 330 if (cl->cl_q == NULL) 331 goto err_ret; 332 } 333 334 pif->pif_classes[pri] = cl; 335 if (flags & PRCF_DEFAULTCLASS) 336 pif->pif_default = cl; 337 if (qlimit == 0) 338 qlimit = 50; /* use default */ 339 qlimit(cl->cl_q) = qlimit; 340 qtype(cl->cl_q) = Q_DROPTAIL; 341 qlen(cl->cl_q) = 0; 342 qsize(cl->cl_q) = 0; 343 cl->cl_flags = flags; 344 cl->cl_pri = pri; 345 if (pri > pif->pif_maxpri) 346 pif->pif_maxpri = pri; 347 cl->cl_pif = pif; 348 cl->cl_handle = qid; 349 350 #ifdef ALTQ_RED 351 if (flags & (PRCF_RED|PRCF_RIO)) { 352 int red_flags, red_pkttime; 353 354 red_flags = 0; 355 if (flags & PRCF_ECN) 356 red_flags |= REDF_ECN; 357 #ifdef ALTQ_RIO 358 if (flags & PRCF_CLEARDSCP) 359 red_flags |= RIOF_CLEARDSCP; 360 #endif 361 if (pif->pif_bandwidth < 8) 362 red_pkttime = 1000 * 1000 * 1000; /* 1 sec */ 363 else 364 red_pkttime = (int64_t)pif->pif_ifq->altq_ifp->if_mtu 365 * 1000 * 1000 * 1000 / (pif->pif_bandwidth / 8); 366 #ifdef ALTQ_RIO 367 if (flags & PRCF_RIO) { 368 cl->cl_red = (red_t *)rio_alloc(0, NULL, 369 red_flags, red_pkttime); 370 if (cl->cl_red == NULL) 371 goto err_ret; 372 qtype(cl->cl_q) = Q_RIO; 373 } else 374 #endif 375 if (flags & PRCF_RED) { 376 cl->cl_red = red_alloc(0, 0, 377 qlimit(cl->cl_q) * 10/100, 378 qlimit(cl->cl_q) * 30/100, 379 red_flags, red_pkttime); 380 if (cl->cl_red == NULL) 381 goto err_ret; 382 qtype(cl->cl_q) = Q_RED; 383 } 384 } 385 #endif /* ALTQ_RED */ 386 #ifdef ALTQ_CODEL 387 if (flags & PRCF_CODEL) { 388 cl->cl_codel = codel_alloc(5, 100, 0); 389 if (cl->cl_codel != NULL) 390 qtype(cl->cl_q) = Q_CODEL; 391 } 392 #endif 393 394 return (cl); 395 396 err_ret: 397 if (cl->cl_red != NULL) { 398 #ifdef ALTQ_RIO 399 if (q_is_rio(cl->cl_q)) 400 rio_destroy((rio_t *)cl->cl_red); 401 #endif 402 #ifdef ALTQ_RED 403 if (q_is_red(cl->cl_q)) 404 red_destroy(cl->cl_red); 405 #endif 406 #ifdef ALTQ_CODEL 407 if (q_is_codel(cl->cl_q)) 408 codel_destroy(cl->cl_codel); 409 #endif 410 } 411 if (cl->cl_q != NULL) 412 free(cl->cl_q, M_DEVBUF); 413 free(cl, M_DEVBUF); 414 return (NULL); 415 } 416 417 static int 418 priq_class_destroy(struct priq_class *cl) 419 { 420 struct priq_if *pif; 421 int s, pri; 422 423 s = splnet(); 424 IFQ_LOCK(cl->cl_pif->pif_ifq); 425 426 #ifdef ALTQ3_CLFIER_COMPAT 427 /* delete filters referencing to this class */ 428 acc_discard_filters(&cl->cl_pif->pif_classifier, cl, 0); 429 #endif 430 431 if (!qempty(cl->cl_q)) 432 priq_purgeq(cl); 433 434 pif = cl->cl_pif; 435 pif->pif_classes[cl->cl_pri] = NULL; 436 if (pif->pif_maxpri == cl->cl_pri) { 437 for (pri = cl->cl_pri; pri >= 0; pri--) 438 if (pif->pif_classes[pri] != NULL) { 439 pif->pif_maxpri = pri; 440 break; 441 } 442 if (pri < 0) 443 pif->pif_maxpri = -1; 444 } 445 IFQ_UNLOCK(cl->cl_pif->pif_ifq); 446 splx(s); 447 448 if (cl->cl_red != NULL) { 449 #ifdef ALTQ_RIO 450 if (q_is_rio(cl->cl_q)) 451 rio_destroy((rio_t *)cl->cl_red); 452 #endif 453 #ifdef ALTQ_RED 454 if (q_is_red(cl->cl_q)) 455 red_destroy(cl->cl_red); 456 #endif 457 #ifdef ALTQ_CODEL 458 if (q_is_codel(cl->cl_q)) 459 codel_destroy(cl->cl_codel); 460 #endif 461 } 462 free(cl->cl_q, M_DEVBUF); 463 free(cl, M_DEVBUF); 464 return (0); 465 } 466 467 /* 468 * priq_enqueue is an enqueue function to be registered to 469 * (*altq_enqueue) in struct ifaltq. 470 */ 471 static int 472 priq_enqueue(struct ifaltq *ifq, struct mbuf *m, struct altq_pktattr *pktattr) 473 { 474 struct priq_if *pif = (struct priq_if *)ifq->altq_disc; 475 struct priq_class *cl; 476 struct pf_mtag *t; 477 int len; 478 479 IFQ_LOCK_ASSERT(ifq); 480 481 /* grab class set by classifier */ 482 if ((m->m_flags & M_PKTHDR) == 0) { 483 /* should not happen */ 484 printf("altq: packet for %s does not have pkthdr\n", 485 ifq->altq_ifp->if_xname); 486 m_freem(m); 487 return (ENOBUFS); 488 } 489 cl = NULL; 490 if ((t = pf_find_mtag(m)) != NULL) 491 cl = clh_to_clp(pif, t->qid); 492 #ifdef ALTQ3_COMPAT 493 else if ((ifq->altq_flags & ALTQF_CLASSIFY) && pktattr != NULL) 494 cl = pktattr->pattr_class; 495 #endif 496 if (cl == NULL) { 497 cl = pif->pif_default; 498 if (cl == NULL) { 499 m_freem(m); 500 return (ENOBUFS); 501 } 502 } 503 #ifdef ALTQ3_COMPAT 504 if (pktattr != NULL) 505 cl->cl_pktattr = pktattr; /* save proto hdr used by ECN */ 506 else 507 #endif 508 cl->cl_pktattr = NULL; 509 len = m_pktlen(m); 510 if (priq_addq(cl, m) != 0) { 511 /* drop occurred. mbuf was freed in priq_addq. */ 512 PKTCNTR_ADD(&cl->cl_dropcnt, len); 513 return (ENOBUFS); 514 } 515 IFQ_INC_LEN(ifq); 516 517 /* successfully queued. */ 518 return (0); 519 } 520 521 /* 522 * priq_dequeue is a dequeue function to be registered to 523 * (*altq_dequeue) in struct ifaltq. 524 * 525 * note: ALTDQ_POLL returns the next packet without removing the packet 526 * from the queue. ALTDQ_REMOVE is a normal dequeue operation. 527 * ALTDQ_REMOVE must return the same packet if called immediately 528 * after ALTDQ_POLL. 529 */ 530 static struct mbuf * 531 priq_dequeue(struct ifaltq *ifq, int op) 532 { 533 struct priq_if *pif = (struct priq_if *)ifq->altq_disc; 534 struct priq_class *cl; 535 struct mbuf *m; 536 int pri; 537 538 IFQ_LOCK_ASSERT(ifq); 539 540 if (IFQ_IS_EMPTY(ifq)) 541 /* no packet in the queue */ 542 return (NULL); 543 544 for (pri = pif->pif_maxpri; pri >= 0; pri--) { 545 if ((cl = pif->pif_classes[pri]) != NULL && 546 !qempty(cl->cl_q)) { 547 if (op == ALTDQ_POLL) 548 return (priq_pollq(cl)); 549 550 m = priq_getq(cl); 551 if (m != NULL) { 552 IFQ_DEC_LEN(ifq); 553 if (qempty(cl->cl_q)) 554 cl->cl_period++; 555 PKTCNTR_ADD(&cl->cl_xmitcnt, m_pktlen(m)); 556 } 557 return (m); 558 } 559 } 560 return (NULL); 561 } 562 563 static int 564 priq_addq(struct priq_class *cl, struct mbuf *m) 565 { 566 567 #ifdef ALTQ_RIO 568 if (q_is_rio(cl->cl_q)) 569 return rio_addq((rio_t *)cl->cl_red, cl->cl_q, m, 570 cl->cl_pktattr); 571 #endif 572 #ifdef ALTQ_RED 573 if (q_is_red(cl->cl_q)) 574 return red_addq(cl->cl_red, cl->cl_q, m, cl->cl_pktattr); 575 #endif 576 #ifdef ALTQ_CODEL 577 if (q_is_codel(cl->cl_q)) 578 return codel_addq(cl->cl_codel, cl->cl_q, m); 579 #endif 580 if (qlen(cl->cl_q) >= qlimit(cl->cl_q)) { 581 m_freem(m); 582 return (-1); 583 } 584 585 if (cl->cl_flags & PRCF_CLEARDSCP) 586 write_dsfield(m, cl->cl_pktattr, 0); 587 588 _addq(cl->cl_q, m); 589 590 return (0); 591 } 592 593 static struct mbuf * 594 priq_getq(struct priq_class *cl) 595 { 596 #ifdef ALTQ_RIO 597 if (q_is_rio(cl->cl_q)) 598 return rio_getq((rio_t *)cl->cl_red, cl->cl_q); 599 #endif 600 #ifdef ALTQ_RED 601 if (q_is_red(cl->cl_q)) 602 return red_getq(cl->cl_red, cl->cl_q); 603 #endif 604 #ifdef ALTQ_CODEL 605 if (q_is_codel(cl->cl_q)) 606 return codel_getq(cl->cl_codel, cl->cl_q); 607 #endif 608 return _getq(cl->cl_q); 609 } 610 611 static struct mbuf * 612 priq_pollq(cl) 613 struct priq_class *cl; 614 { 615 return qhead(cl->cl_q); 616 } 617 618 static void 619 priq_purgeq(struct priq_class *cl) 620 { 621 struct mbuf *m; 622 623 if (qempty(cl->cl_q)) 624 return; 625 626 while ((m = _getq(cl->cl_q)) != NULL) { 627 PKTCNTR_ADD(&cl->cl_dropcnt, m_pktlen(m)); 628 m_freem(m); 629 } 630 ASSERT(qlen(cl->cl_q) == 0); 631 } 632 633 static void 634 get_class_stats(struct priq_classstats *sp, struct priq_class *cl) 635 { 636 sp->class_handle = cl->cl_handle; 637 sp->qlength = qlen(cl->cl_q); 638 sp->qlimit = qlimit(cl->cl_q); 639 sp->period = cl->cl_period; 640 sp->xmitcnt = cl->cl_xmitcnt; 641 sp->dropcnt = cl->cl_dropcnt; 642 643 sp->qtype = qtype(cl->cl_q); 644 #ifdef ALTQ_RED 645 if (q_is_red(cl->cl_q)) 646 red_getstats(cl->cl_red, &sp->red[0]); 647 #endif 648 #ifdef ALTQ_RIO 649 if (q_is_rio(cl->cl_q)) 650 rio_getstats((rio_t *)cl->cl_red, &sp->red[0]); 651 #endif 652 #ifdef ALTQ_CODEL 653 if (q_is_codel(cl->cl_q)) 654 codel_getstats(cl->cl_codel, &sp->codel); 655 #endif 656 } 657 658 /* convert a class handle to the corresponding class pointer */ 659 static struct priq_class * 660 clh_to_clp(struct priq_if *pif, u_int32_t chandle) 661 { 662 struct priq_class *cl; 663 int idx; 664 665 if (chandle == 0) 666 return (NULL); 667 668 for (idx = pif->pif_maxpri; idx >= 0; idx--) 669 if ((cl = pif->pif_classes[idx]) != NULL && 670 cl->cl_handle == chandle) 671 return (cl); 672 673 return (NULL); 674 } 675 676 677 #ifdef ALTQ3_COMPAT 678 679 static struct priq_if * 680 priq_attach(ifq, bandwidth) 681 struct ifaltq *ifq; 682 u_int bandwidth; 683 { 684 struct priq_if *pif; 685 686 pif = malloc(sizeof(struct priq_if), 687 M_DEVBUF, M_WAITOK); 688 if (pif == NULL) 689 return (NULL); 690 bzero(pif, sizeof(struct priq_if)); 691 pif->pif_bandwidth = bandwidth; 692 pif->pif_maxpri = -1; 693 pif->pif_ifq = ifq; 694 695 /* add this state to the priq list */ 696 pif->pif_next = pif_list; 697 pif_list = pif; 698 699 return (pif); 700 } 701 702 static int 703 priq_detach(pif) 704 struct priq_if *pif; 705 { 706 (void)priq_clear_interface(pif); 707 708 /* remove this interface from the pif list */ 709 if (pif_list == pif) 710 pif_list = pif->pif_next; 711 else { 712 struct priq_if *p; 713 714 for (p = pif_list; p != NULL; p = p->pif_next) 715 if (p->pif_next == pif) { 716 p->pif_next = pif->pif_next; 717 break; 718 } 719 ASSERT(p != NULL); 720 } 721 722 free(pif, M_DEVBUF); 723 return (0); 724 } 725 726 /* 727 * priq device interface 728 */ 729 int 730 priqopen(dev, flag, fmt, p) 731 dev_t dev; 732 int flag, fmt; 733 #if (__FreeBSD_version > 500000) 734 struct thread *p; 735 #else 736 struct proc *p; 737 #endif 738 { 739 /* everything will be done when the queueing scheme is attached. */ 740 return 0; 741 } 742 743 int 744 priqclose(dev, flag, fmt, p) 745 dev_t dev; 746 int flag, fmt; 747 #if (__FreeBSD_version > 500000) 748 struct thread *p; 749 #else 750 struct proc *p; 751 #endif 752 { 753 struct priq_if *pif; 754 int err, error = 0; 755 756 while ((pif = pif_list) != NULL) { 757 /* destroy all */ 758 if (ALTQ_IS_ENABLED(pif->pif_ifq)) 759 altq_disable(pif->pif_ifq); 760 761 err = altq_detach(pif->pif_ifq); 762 if (err == 0) 763 err = priq_detach(pif); 764 if (err != 0 && error == 0) 765 error = err; 766 } 767 768 return error; 769 } 770 771 int 772 priqioctl(dev, cmd, addr, flag, p) 773 dev_t dev; 774 ioctlcmd_t cmd; 775 caddr_t addr; 776 int flag; 777 #if (__FreeBSD_version > 500000) 778 struct thread *p; 779 #else 780 struct proc *p; 781 #endif 782 { 783 struct priq_if *pif; 784 struct priq_interface *ifacep; 785 int error = 0; 786 787 /* check super-user privilege */ 788 switch (cmd) { 789 case PRIQ_GETSTATS: 790 break; 791 default: 792 #if (__FreeBSD_version > 700000) 793 if ((error = priv_check(p, PRIV_ALTQ_MANAGE)) != 0) 794 return (error); 795 #elsif (__FreeBSD_version > 400000) 796 if ((error = suser(p)) != 0) 797 return (error); 798 #else 799 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 800 return (error); 801 #endif 802 break; 803 } 804 805 switch (cmd) { 806 807 case PRIQ_IF_ATTACH: 808 error = priqcmd_if_attach((struct priq_interface *)addr); 809 break; 810 811 case PRIQ_IF_DETACH: 812 error = priqcmd_if_detach((struct priq_interface *)addr); 813 break; 814 815 case PRIQ_ENABLE: 816 case PRIQ_DISABLE: 817 case PRIQ_CLEAR: 818 ifacep = (struct priq_interface *)addr; 819 if ((pif = altq_lookup(ifacep->ifname, 820 ALTQT_PRIQ)) == NULL) { 821 error = EBADF; 822 break; 823 } 824 825 switch (cmd) { 826 case PRIQ_ENABLE: 827 if (pif->pif_default == NULL) { 828 #ifdef ALTQ_DEBUG 829 printf("priq: no default class\n"); 830 #endif 831 error = EINVAL; 832 break; 833 } 834 error = altq_enable(pif->pif_ifq); 835 break; 836 837 case PRIQ_DISABLE: 838 error = altq_disable(pif->pif_ifq); 839 break; 840 841 case PRIQ_CLEAR: 842 priq_clear_interface(pif); 843 break; 844 } 845 break; 846 847 case PRIQ_ADD_CLASS: 848 error = priqcmd_add_class((struct priq_add_class *)addr); 849 break; 850 851 case PRIQ_DEL_CLASS: 852 error = priqcmd_delete_class((struct priq_delete_class *)addr); 853 break; 854 855 case PRIQ_MOD_CLASS: 856 error = priqcmd_modify_class((struct priq_modify_class *)addr); 857 break; 858 859 case PRIQ_ADD_FILTER: 860 error = priqcmd_add_filter((struct priq_add_filter *)addr); 861 break; 862 863 case PRIQ_DEL_FILTER: 864 error = priqcmd_delete_filter((struct priq_delete_filter *)addr); 865 break; 866 867 case PRIQ_GETSTATS: 868 error = priqcmd_class_stats((struct priq_class_stats *)addr); 869 break; 870 871 default: 872 error = EINVAL; 873 break; 874 } 875 return error; 876 } 877 878 static int 879 priqcmd_if_attach(ap) 880 struct priq_interface *ap; 881 { 882 struct priq_if *pif; 883 struct ifnet *ifp; 884 int error; 885 886 if ((ifp = ifunit(ap->ifname)) == NULL) 887 return (ENXIO); 888 889 if ((pif = priq_attach(&ifp->if_snd, ap->arg)) == NULL) 890 return (ENOMEM); 891 892 /* 893 * set PRIQ to this ifnet structure. 894 */ 895 if ((error = altq_attach(&ifp->if_snd, ALTQT_PRIQ, pif, 896 priq_enqueue, priq_dequeue, priq_request, 897 &pif->pif_classifier, acc_classify)) != 0) 898 (void)priq_detach(pif); 899 900 return (error); 901 } 902 903 static int 904 priqcmd_if_detach(ap) 905 struct priq_interface *ap; 906 { 907 struct priq_if *pif; 908 int error; 909 910 if ((pif = altq_lookup(ap->ifname, ALTQT_PRIQ)) == NULL) 911 return (EBADF); 912 913 if (ALTQ_IS_ENABLED(pif->pif_ifq)) 914 altq_disable(pif->pif_ifq); 915 916 if ((error = altq_detach(pif->pif_ifq))) 917 return (error); 918 919 return priq_detach(pif); 920 } 921 922 static int 923 priqcmd_add_class(ap) 924 struct priq_add_class *ap; 925 { 926 struct priq_if *pif; 927 struct priq_class *cl; 928 int qid; 929 930 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 931 return (EBADF); 932 933 if (ap->pri < 0 || ap->pri >= PRIQ_MAXPRI) 934 return (EINVAL); 935 if (pif->pif_classes[ap->pri] != NULL) 936 return (EBUSY); 937 938 qid = ap->pri + 1; 939 if ((cl = priq_class_create(pif, ap->pri, 940 ap->qlimit, ap->flags, qid)) == NULL) 941 return (ENOMEM); 942 943 /* return a class handle to the user */ 944 ap->class_handle = cl->cl_handle; 945 946 return (0); 947 } 948 949 static int 950 priqcmd_delete_class(ap) 951 struct priq_delete_class *ap; 952 { 953 struct priq_if *pif; 954 struct priq_class *cl; 955 956 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 957 return (EBADF); 958 959 if ((cl = clh_to_clp(pif, ap->class_handle)) == NULL) 960 return (EINVAL); 961 962 return priq_class_destroy(cl); 963 } 964 965 static int 966 priqcmd_modify_class(ap) 967 struct priq_modify_class *ap; 968 { 969 struct priq_if *pif; 970 struct priq_class *cl; 971 972 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 973 return (EBADF); 974 975 if (ap->pri < 0 || ap->pri >= PRIQ_MAXPRI) 976 return (EINVAL); 977 978 if ((cl = clh_to_clp(pif, ap->class_handle)) == NULL) 979 return (EINVAL); 980 981 /* 982 * if priority is changed, move the class to the new priority 983 */ 984 if (pif->pif_classes[ap->pri] != cl) { 985 if (pif->pif_classes[ap->pri] != NULL) 986 return (EEXIST); 987 pif->pif_classes[cl->cl_pri] = NULL; 988 pif->pif_classes[ap->pri] = cl; 989 cl->cl_pri = ap->pri; 990 } 991 992 /* call priq_class_create to change class parameters */ 993 if ((cl = priq_class_create(pif, ap->pri, 994 ap->qlimit, ap->flags, ap->class_handle)) == NULL) 995 return (ENOMEM); 996 return 0; 997 } 998 999 static int 1000 priqcmd_add_filter(ap) 1001 struct priq_add_filter *ap; 1002 { 1003 struct priq_if *pif; 1004 struct priq_class *cl; 1005 1006 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 1007 return (EBADF); 1008 1009 if ((cl = clh_to_clp(pif, ap->class_handle)) == NULL) 1010 return (EINVAL); 1011 1012 return acc_add_filter(&pif->pif_classifier, &ap->filter, 1013 cl, &ap->filter_handle); 1014 } 1015 1016 static int 1017 priqcmd_delete_filter(ap) 1018 struct priq_delete_filter *ap; 1019 { 1020 struct priq_if *pif; 1021 1022 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 1023 return (EBADF); 1024 1025 return acc_delete_filter(&pif->pif_classifier, 1026 ap->filter_handle); 1027 } 1028 1029 static int 1030 priqcmd_class_stats(ap) 1031 struct priq_class_stats *ap; 1032 { 1033 struct priq_if *pif; 1034 struct priq_class *cl; 1035 struct priq_classstats stats, *usp; 1036 int pri, error; 1037 1038 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL) 1039 return (EBADF); 1040 1041 ap->maxpri = pif->pif_maxpri; 1042 1043 /* then, read the next N classes in the tree */ 1044 usp = ap->stats; 1045 for (pri = 0; pri <= pif->pif_maxpri; pri++) { 1046 cl = pif->pif_classes[pri]; 1047 if (cl != NULL) 1048 get_class_stats(&stats, cl); 1049 else 1050 bzero(&stats, sizeof(stats)); 1051 if ((error = copyout((caddr_t)&stats, (caddr_t)usp++, 1052 sizeof(stats))) != 0) 1053 return (error); 1054 } 1055 return (0); 1056 } 1057 1058 #ifdef KLD_MODULE 1059 1060 static struct altqsw priq_sw = 1061 {"priq", priqopen, priqclose, priqioctl}; 1062 1063 ALTQ_MODULE(altq_priq, ALTQT_PRIQ, &priq_sw); 1064 MODULE_DEPEND(altq_priq, altq_red, 1, 1, 1); 1065 MODULE_DEPEND(altq_priq, altq_rio, 1, 1, 1); 1066 1067 #endif /* KLD_MODULE */ 1068 1069 #endif /* ALTQ3_COMPAT */ 1070 #endif /* ALTQ_PRIQ */ 1071