1 /* $NetBSD: altq_cbq.c,v 1.6 2002/10/07 02:57:39 itojun Exp $ */ 2 /* $KAME: altq_cbq.c,v 1.11 2002/10/04 14:24:09 kjc Exp $ */ 3 4 /* 5 * Copyright (c) Sun Microsystems, Inc. 1993-1998 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 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the SMCC Technology 21 * Development Group at Sun Microsystems, Inc. 22 * 23 * 4. The name of the Sun Microsystems, Inc nor may not be used to endorse or 24 * promote products derived from this software without specific prior 25 * written permission. 26 * 27 * SUN MICROSYSTEMS DOES NOT CLAIM MERCHANTABILITY OF THIS SOFTWARE OR THE 28 * SUITABILITY OF THIS SOFTWARE FOR ANY PARTICULAR PURPOSE. The software is 29 * provided "as is" without express or implied warranty of any kind. 30 * 31 * These notices must be retained in any copies of any part of this software. 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: altq_cbq.c,v 1.6 2002/10/07 02:57:39 itojun Exp $"); 36 37 #if defined(__FreeBSD__) || defined(__NetBSD__) 38 #include "opt_altq.h" 39 #if (__FreeBSD__ != 2) 40 #include "opt_inet.h" 41 #ifdef __FreeBSD__ 42 #include "opt_inet6.h" 43 #endif 44 #endif 45 #endif /* __FreeBSD__ || __NetBSD__ */ 46 #ifdef ALTQ_CBQ /* cbq is enabled by ALTQ_CBQ option in opt_altq.h */ 47 48 /* #pragma ident "@(#)cbq.c 1.39 98/05/13 SMI" */ 49 50 #include <sys/param.h> 51 #include <sys/malloc.h> 52 #include <sys/mbuf.h> 53 #include <sys/uio.h> 54 #include <sys/socket.h> 55 #include <sys/systm.h> 56 #include <sys/proc.h> 57 #include <sys/errno.h> 58 #include <sys/time.h> 59 #include <sys/kernel.h> 60 61 #include <net/if.h> 62 #include <net/if_types.h> 63 #include <netinet/in.h> 64 65 #include <altq/altq.h> 66 #include <altq/altq_conf.h> 67 #include <altq/altq_cbq.h> 68 69 /* 70 * Local Data structures. 71 */ 72 static cbq_state_t *cbq_list = NULL; 73 74 /* 75 * Forward Declarations. 76 */ 77 78 static int cbq_add_class __P((struct cbq_add_class *)); 79 static int cbq_delete_class __P((struct cbq_delete_class *)); 80 static int cbq_modify_class __P((struct cbq_modify_class *)); 81 static int cbq_class_create __P((cbq_state_t *, struct cbq_add_class *, 82 struct rm_class *, struct rm_class *)); 83 static int cbq_class_destroy __P((cbq_state_t *, struct rm_class *)); 84 static struct rm_class *clh_to_clp __P((cbq_state_t *, u_long)); 85 static int cbq_add_filter __P((struct cbq_add_filter *)); 86 static int cbq_delete_filter __P((struct cbq_delete_filter *)); 87 88 static int cbq_clear_hierarchy __P((struct cbq_interface *)); 89 static int cbq_clear_interface __P((cbq_state_t *)); 90 static int cbq_request __P((struct ifaltq *, int, void *)); 91 static int cbq_set_enable __P((struct cbq_interface *, int)); 92 static int cbq_ifattach __P((struct cbq_interface *)); 93 static int cbq_ifdetach __P((struct cbq_interface *)); 94 static int cbq_enqueue __P((struct ifaltq *, struct mbuf *, 95 struct altq_pktattr *)); 96 static struct mbuf *cbq_dequeue __P((struct ifaltq *, int)); 97 static void cbqrestart __P((struct ifaltq *)); 98 static void get_class_stats __P((class_stats_t *, struct rm_class *)); 99 static int cbq_getstats __P((struct cbq_getstats *)); 100 static void cbq_purge(cbq_state_t *); 101 102 static int 103 cbq_add_class(acp) 104 struct cbq_add_class *acp; 105 { 106 char *ifacename; 107 struct rm_class *borrow, *parent; 108 cbq_state_t *cbqp; 109 110 ifacename = acp->cbq_iface.cbq_ifacename; 111 if ((cbqp = altq_lookup(ifacename, ALTQT_CBQ)) == NULL) 112 return (EBADF); 113 114 /* check parameters */ 115 if (acp->cbq_class.priority >= RM_MAXPRIO || 116 acp->cbq_class.maxq > CBQ_MAXQSIZE) 117 return (EINVAL); 118 119 /* Get pointers to parent and borrow classes. */ 120 parent = clh_to_clp(cbqp, acp->cbq_class.parent_class_handle); 121 borrow = clh_to_clp(cbqp, acp->cbq_class.borrow_class_handle); 122 123 /* 124 * A class must borrow from it's parent or it can not 125 * borrow at all. Hence, borrow can be null. 126 */ 127 if (parent == NULL && (acp->cbq_class.flags & CBQCLF_ROOTCLASS) == 0) { 128 printf("cbq_add_class: no parent class!\n"); 129 return (EINVAL); 130 } 131 132 if ((borrow != parent) && (borrow != NULL)) { 133 printf("cbq_add_class: borrow class != parent\n"); 134 return (EINVAL); 135 } 136 137 return cbq_class_create(cbqp, acp, parent, borrow); 138 } 139 140 static int 141 cbq_delete_class(dcp) 142 struct cbq_delete_class *dcp; 143 { 144 char *ifacename; 145 struct rm_class *cl; 146 cbq_state_t *cbqp; 147 148 ifacename = dcp->cbq_iface.cbq_ifacename; 149 if ((cbqp = altq_lookup(ifacename, ALTQT_CBQ)) == NULL) 150 return (EBADF); 151 152 if ((cl = clh_to_clp(cbqp, dcp->cbq_class_handle)) == NULL) 153 return (EINVAL); 154 155 /* if we are a parent class, then return an error. */ 156 if (is_a_parent_class(cl)) 157 return (EINVAL); 158 159 /* if a filter has a reference to this class delete the filter */ 160 acc_discard_filters(&cbqp->cbq_classifier, cl, 0); 161 162 return cbq_class_destroy(cbqp, cl); 163 } 164 165 static int 166 cbq_modify_class(acp) 167 struct cbq_modify_class *acp; 168 { 169 char *ifacename; 170 struct rm_class *cl; 171 cbq_state_t *cbqp; 172 173 ifacename = acp->cbq_iface.cbq_ifacename; 174 if ((cbqp = altq_lookup(ifacename, ALTQT_CBQ)) == NULL) 175 return (EBADF); 176 177 /* Get pointer to this class */ 178 if ((cl = clh_to_clp(cbqp, acp->cbq_class_handle)) == NULL) 179 return (EINVAL); 180 181 if (rmc_modclass(cl, acp->cbq_class.nano_sec_per_byte, 182 acp->cbq_class.maxq, acp->cbq_class.maxidle, 183 acp->cbq_class.minidle, acp->cbq_class.offtime, 184 acp->cbq_class.pktsize) < 0) 185 return (EINVAL); 186 return (0); 187 } 188 189 /* 190 * struct rm_class * 191 * cbq_class_create(cbq_mod_state_t *cbqp, struct cbq_add_class *acp, 192 * u_long handle, struct rm_class *parent, 193 * struct rm_class *borrow) 194 * 195 * This function create a new traffic class in the CBQ class hierarchy of 196 * given paramters. The class that created is either the root, default, 197 * or a new dynamic class. If CBQ is not initilaized, the the root class 198 * will be created. 199 */ 200 static int 201 cbq_class_create(cbqp, acp, parent, borrow) 202 cbq_state_t *cbqp; 203 struct cbq_add_class *acp; 204 struct rm_class *parent, *borrow; 205 { 206 struct rm_class *cl; 207 cbq_class_spec_t *spec = &acp->cbq_class; 208 u_long chandle; 209 int i; 210 211 /* 212 * allocate class handle 213 */ 214 switch (spec->flags & CBQCLF_CLASSMASK) { 215 case CBQCLF_ROOTCLASS: 216 if (parent != NULL) 217 return (EINVAL); 218 if (cbqp->ifnp.root_) 219 return (EINVAL); 220 chandle = ROOT_CLASS_HANDLE; 221 break; 222 case CBQCLF_DEFCLASS: 223 if (cbqp->ifnp.default_) 224 return (EINVAL); 225 chandle = DEFAULT_CLASS_HANDLE; 226 break; 227 case CBQCLF_CTLCLASS: 228 if (cbqp->ifnp.ctl_) 229 return (EINVAL); 230 chandle = CTL_CLASS_HANDLE; 231 break; 232 case 0: 233 /* find a free class slot */ 234 for (i = 0; i < CBQ_MAX_CLASSES; i++) 235 if (cbqp->cbq_class_tbl[i] == NULL) 236 break; 237 if (i == CBQ_MAX_CLASSES) 238 return (ENOSPC); 239 chandle = (u_long)i; 240 break; 241 default: 242 /* more than two flags bits set */ 243 return (EINVAL); 244 } 245 246 /* 247 * create a class. if this is a root class, initialize the 248 * interface. 249 */ 250 if (chandle == ROOT_CLASS_HANDLE) { 251 rmc_init(cbqp->ifnp.ifq_, &cbqp->ifnp, spec->nano_sec_per_byte, 252 cbqrestart, spec->maxq, RM_MAXQUEUED, 253 spec->maxidle, spec->minidle, spec->offtime, 254 spec->flags); 255 cl = cbqp->ifnp.root_; 256 } else { 257 cl = rmc_newclass(spec->priority, 258 &cbqp->ifnp, spec->nano_sec_per_byte, 259 rmc_delay_action, spec->maxq, parent, borrow, 260 spec->maxidle, spec->minidle, spec->offtime, 261 spec->pktsize, spec->flags); 262 } 263 if (cl == NULL) 264 return (ENOMEM); 265 266 /* return handle to user space. */ 267 acp->cbq_class_handle = chandle; 268 269 cl->stats_.handle = chandle; 270 cl->stats_.depth = cl->depth_; 271 272 /* save the allocated class */ 273 switch (chandle) { 274 case NULL_CLASS_HANDLE: 275 case ROOT_CLASS_HANDLE: 276 break; 277 case DEFAULT_CLASS_HANDLE: 278 cbqp->ifnp.default_ = cl; 279 break; 280 case CTL_CLASS_HANDLE: 281 cbqp->ifnp.ctl_ = cl; 282 break; 283 default: 284 cbqp->cbq_class_tbl[chandle] = cl; 285 break; 286 } 287 return (0); 288 } 289 290 /* 291 * int 292 * cbq_class_destroy(cbq_mod_state_t *, struct rm_class *) - This 293 * function destroys a given traffic class. Before destorying 294 * the class, all traffic for that class is released. 295 */ 296 static int 297 cbq_class_destroy(cbqp, cl) 298 cbq_state_t *cbqp; 299 struct rm_class *cl; 300 { 301 u_long chandle; 302 303 chandle = cl->stats_.handle; 304 305 /* delete the class */ 306 rmc_delete_class(&cbqp->ifnp, cl); 307 308 /* 309 * free the class handle 310 */ 311 switch (chandle) { 312 case ROOT_CLASS_HANDLE: 313 cbqp->ifnp.root_ = NULL; 314 break; 315 case DEFAULT_CLASS_HANDLE: 316 cbqp->ifnp.default_ = NULL; 317 break; 318 case CTL_CLASS_HANDLE: 319 cbqp->ifnp.ctl_ = NULL; 320 break; 321 case NULL_CLASS_HANDLE: 322 break; 323 default: 324 if (chandle >= CBQ_MAX_CLASSES) 325 break; 326 cbqp->cbq_class_tbl[chandle] = NULL; 327 } 328 329 return (0); 330 } 331 332 /* convert class handle to class pointer */ 333 static struct rm_class * 334 clh_to_clp(cbqp, chandle) 335 cbq_state_t *cbqp; 336 u_long chandle; 337 { 338 switch (chandle) { 339 case NULL_CLASS_HANDLE: 340 return (NULL); 341 case ROOT_CLASS_HANDLE: 342 return (cbqp->ifnp.root_); 343 case DEFAULT_CLASS_HANDLE: 344 return (cbqp->ifnp.default_); 345 case CTL_CLASS_HANDLE: 346 return (cbqp->ifnp.ctl_); 347 } 348 349 if (chandle >= CBQ_MAX_CLASSES) 350 return (NULL); 351 352 return (cbqp->cbq_class_tbl[chandle]); 353 } 354 355 static int 356 cbq_add_filter(afp) 357 struct cbq_add_filter *afp; 358 { 359 char *ifacename; 360 cbq_state_t *cbqp; 361 struct rm_class *cl; 362 363 ifacename = afp->cbq_iface.cbq_ifacename; 364 if ((cbqp = altq_lookup(ifacename, ALTQT_CBQ)) == NULL) 365 return (EBADF); 366 367 /* Get the pointer to class. */ 368 if ((cl = clh_to_clp(cbqp, afp->cbq_class_handle)) == NULL) 369 return (EINVAL); 370 371 return acc_add_filter(&cbqp->cbq_classifier, &afp->cbq_filter, 372 cl, &afp->cbq_filter_handle); 373 } 374 375 static int 376 cbq_delete_filter(dfp) 377 struct cbq_delete_filter *dfp; 378 { 379 char *ifacename; 380 cbq_state_t *cbqp; 381 382 ifacename = dfp->cbq_iface.cbq_ifacename; 383 if ((cbqp = altq_lookup(ifacename, ALTQT_CBQ)) == NULL) 384 return (EBADF); 385 386 return acc_delete_filter(&cbqp->cbq_classifier, 387 dfp->cbq_filter_handle); 388 } 389 390 /* 391 * cbq_clear_hierarchy deletes all classes and their filters on the 392 * given interface. 393 */ 394 static int 395 cbq_clear_hierarchy(ifacep) 396 struct cbq_interface *ifacep; 397 { 398 char *ifacename; 399 cbq_state_t *cbqp; 400 401 ifacename = ifacep->cbq_ifacename; 402 if ((cbqp = altq_lookup(ifacename, ALTQT_CBQ)) == NULL) 403 return (EBADF); 404 405 return cbq_clear_interface(cbqp); 406 } 407 408 static int 409 cbq_clear_interface(cbqp) 410 cbq_state_t *cbqp; 411 { 412 int again, i; 413 struct rm_class *cl; 414 415 /* free the filters for this interface */ 416 acc_discard_filters(&cbqp->cbq_classifier, NULL, 1); 417 418 /* clear out the classes now */ 419 do { 420 again = 0; 421 for (i = 0; i < CBQ_MAX_CLASSES; i++) { 422 if ((cl = cbqp->cbq_class_tbl[i]) != NULL) { 423 if (is_a_parent_class(cl)) 424 again++; 425 else { 426 cbq_class_destroy(cbqp, cl); 427 cbqp->cbq_class_tbl[i] = NULL; 428 } 429 } 430 } 431 if (cbqp->ifnp.ctl_ != NULL && 432 !is_a_parent_class(cbqp->ifnp.ctl_)) { 433 cbq_class_destroy(cbqp, cbqp->ifnp.ctl_); 434 cbqp->ifnp.ctl_ = NULL; 435 } 436 if (cbqp->ifnp.default_ != NULL && 437 !is_a_parent_class(cbqp->ifnp.default_)) { 438 cbq_class_destroy(cbqp, cbqp->ifnp.default_); 439 cbqp->ifnp.default_ = NULL; 440 } 441 if (cbqp->ifnp.root_ != NULL && 442 !is_a_parent_class(cbqp->ifnp.root_)) { 443 cbq_class_destroy(cbqp, cbqp->ifnp.root_); 444 cbqp->ifnp.root_ = NULL; 445 } 446 } while (again); 447 448 return (0); 449 } 450 451 static int 452 cbq_request(ifq, req, arg) 453 struct ifaltq *ifq; 454 int req; 455 void *arg; 456 { 457 cbq_state_t *cbqp = (cbq_state_t *)ifq->altq_disc; 458 459 switch (req) { 460 case ALTRQ_PURGE: 461 cbq_purge(cbqp); 462 break; 463 } 464 return (0); 465 } 466 467 /* 468 * static int 469 * cbq_set_enable(struct cbq_enable *ep) - this function processed the 470 * ioctl request to enable class based queueing. It searches the list 471 * of interfaces for the specified interface and then enables CBQ on 472 * that interface. 473 * 474 * Returns: 0, for no error. 475 * EBADF, for specified inteface not found. 476 */ 477 478 static int 479 cbq_set_enable(ep, enable) 480 struct cbq_interface *ep; 481 int enable; 482 { 483 int error = 0; 484 cbq_state_t *cbqp; 485 char *ifacename; 486 487 ifacename = ep->cbq_ifacename; 488 if ((cbqp = altq_lookup(ifacename, ALTQT_CBQ)) == NULL) 489 return (EBADF); 490 491 switch (enable) { 492 case ENABLE: 493 if (cbqp->ifnp.root_ == NULL || cbqp->ifnp.default_ == NULL || 494 cbqp->ifnp.ctl_ == NULL) { 495 if (cbqp->ifnp.root_ == NULL) 496 printf("No Root Class for %s\n", ifacename); 497 if (cbqp->ifnp.default_ == NULL) 498 printf("No Default Class for %s\n", ifacename); 499 if (cbqp->ifnp.ctl_ == NULL) 500 printf("No Control Class for %s\n", ifacename); 501 error = EINVAL; 502 } else if ((error = altq_enable(cbqp->ifnp.ifq_)) == 0) { 503 cbqp->cbq_qlen = 0; 504 } 505 break; 506 507 case DISABLE: 508 error = altq_disable(cbqp->ifnp.ifq_); 509 break; 510 } 511 return (error); 512 } 513 514 /* copy the stats info in rm_class to class_states_t */ 515 static void 516 get_class_stats(statsp, cl) 517 class_stats_t *statsp; 518 struct rm_class *cl; 519 { 520 statsp->xmit_cnt = cl->stats_.xmit_cnt; 521 statsp->drop_cnt = cl->stats_.drop_cnt; 522 statsp->over = cl->stats_.over; 523 statsp->borrows = cl->stats_.borrows; 524 statsp->overactions = cl->stats_.overactions; 525 statsp->delays = cl->stats_.delays; 526 527 statsp->depth = cl->depth_; 528 statsp->priority = cl->pri_; 529 statsp->maxidle = cl->maxidle_; 530 statsp->minidle = cl->minidle_; 531 statsp->offtime = cl->offtime_; 532 statsp->qmax = qlimit(cl->q_); 533 statsp->ns_per_byte = cl->ns_per_byte_; 534 statsp->wrr_allot = cl->w_allotment_; 535 statsp->qcnt = qlen(cl->q_); 536 statsp->avgidle = cl->avgidle_; 537 538 statsp->qtype = qtype(cl->q_); 539 #ifdef ALTQ_RED 540 if (q_is_red(cl->q_)) 541 red_getstats(cl->red_, &statsp->red[0]); 542 #endif 543 #ifdef ALTQ_RIO 544 if (q_is_rio(cl->q_)) 545 rio_getstats((rio_t *)cl->red_, &statsp->red[0]); 546 #endif 547 } 548 549 static int 550 cbq_getstats(gsp) 551 struct cbq_getstats *gsp; 552 { 553 char *ifacename; 554 int chandle, n, nclasses; 555 cbq_state_t *cbqp; 556 struct rm_class *cl; 557 class_stats_t stats, *usp; 558 int error = 0; 559 560 ifacename = gsp->iface.cbq_ifacename; 561 nclasses = gsp->nclasses; 562 usp = gsp->stats; 563 564 if ((cbqp = altq_lookup(ifacename, ALTQT_CBQ)) == NULL) 565 return (EBADF); 566 if (nclasses <= 0) 567 return (EINVAL); 568 569 for (n = 0, chandle = 0; n < nclasses && chandle < CBQ_MAX_CLASSES; 570 n++) { 571 switch(n) { 572 case 0: 573 cl = cbqp->ifnp.root_; 574 stats.handle = ROOT_CLASS_HANDLE; 575 break; 576 case 1: 577 cl = cbqp->ifnp.default_; 578 stats.handle = DEFAULT_CLASS_HANDLE; 579 break; 580 case 2: 581 cl = cbqp->ifnp.ctl_; 582 stats.handle = CTL_CLASS_HANDLE; 583 break; 584 default: 585 while ((cl = cbqp->cbq_class_tbl[chandle]) == NULL) 586 if (++chandle >= CBQ_MAX_CLASSES) 587 goto out; 588 stats.handle = chandle++; 589 break; 590 } 591 592 get_class_stats(&stats, cl); 593 594 if ((error = copyout((caddr_t)&stats, (caddr_t)usp++, 595 sizeof(stats))) != 0) 596 return (error); 597 } 598 599 out: 600 gsp->nclasses = n; 601 return (error); 602 } 603 604 static int 605 cbq_ifattach(ifacep) 606 struct cbq_interface *ifacep; 607 { 608 int error = 0; 609 char *ifacename; 610 cbq_state_t *new_cbqp; 611 struct ifnet *ifp; 612 613 ifacename = ifacep->cbq_ifacename; 614 if ((ifp = ifunit(ifacename)) == NULL) 615 return (ENXIO); 616 if (!ALTQ_IS_READY(&ifp->if_snd)) 617 return (ENXIO); 618 619 /* allocate and initialize cbq_state_t */ 620 MALLOC(new_cbqp, cbq_state_t *, sizeof(cbq_state_t), M_DEVBUF, M_WAITOK); 621 if (new_cbqp == NULL) 622 return (ENOMEM); 623 bzero(new_cbqp, sizeof(cbq_state_t)); 624 CALLOUT_INIT(&new_cbqp->cbq_callout); 625 MALLOC(new_cbqp->cbq_class_tbl, struct rm_class **, 626 sizeof(struct rm_class *) * CBQ_MAX_CLASSES, M_DEVBUF, M_WAITOK); 627 if (new_cbqp->cbq_class_tbl == NULL) { 628 FREE(new_cbqp, M_DEVBUF); 629 return (ENOMEM); 630 } 631 bzero(new_cbqp->cbq_class_tbl, sizeof(struct rm_class *) * CBQ_MAX_CLASSES); 632 new_cbqp->cbq_qlen = 0; 633 new_cbqp->ifnp.ifq_ = &ifp->if_snd; /* keep the ifq */ 634 635 /* 636 * set CBQ to this ifnet structure. 637 */ 638 error = altq_attach(&ifp->if_snd, ALTQT_CBQ, new_cbqp, 639 cbq_enqueue, cbq_dequeue, cbq_request, 640 &new_cbqp->cbq_classifier, acc_classify); 641 if (error) { 642 FREE(new_cbqp->cbq_class_tbl, M_DEVBUF); 643 FREE(new_cbqp, M_DEVBUF); 644 return (error); 645 } 646 647 /* prepend to the list of cbq_state_t's. */ 648 new_cbqp->cbq_next = cbq_list; 649 cbq_list = new_cbqp; 650 651 return (0); 652 } 653 654 static int 655 cbq_ifdetach(ifacep) 656 struct cbq_interface *ifacep; 657 { 658 char *ifacename; 659 cbq_state_t *cbqp; 660 661 ifacename = ifacep->cbq_ifacename; 662 if ((cbqp = altq_lookup(ifacename, ALTQT_CBQ)) == NULL) 663 return (EBADF); 664 665 (void)cbq_set_enable(ifacep, DISABLE); 666 667 cbq_clear_interface(cbqp); 668 669 if (cbqp->ifnp.ctl_) 670 cbq_class_destroy(cbqp, cbqp->ifnp.ctl_); 671 if (cbqp->ifnp.default_) 672 cbq_class_destroy(cbqp, cbqp->ifnp.default_); 673 if (cbqp->ifnp.root_) 674 cbq_class_destroy(cbqp, cbqp->ifnp.root_); 675 676 /* remove CBQ from the ifnet structure. */ 677 (void)altq_detach(cbqp->ifnp.ifq_); 678 679 /* remove from the list of cbq_state_t's. */ 680 if (cbq_list == cbqp) 681 cbq_list = cbqp->cbq_next; 682 else { 683 cbq_state_t *cp; 684 685 for (cp = cbq_list; cp != NULL; cp = cp->cbq_next) 686 if (cp->cbq_next == cbqp) { 687 cp->cbq_next = cbqp->cbq_next; 688 break; 689 } 690 ASSERT(cp != NULL); 691 } 692 693 /* deallocate cbq_state_t */ 694 FREE(cbqp->cbq_class_tbl, M_DEVBUF); 695 FREE(cbqp, M_DEVBUF); 696 697 return (0); 698 } 699 700 /* 701 * int 702 * cbq_enqueue(struct ifaltq *ifq, struct mbuf *m, struct altq_pktattr *pattr) 703 * - Queue data packets. 704 * 705 * cbq_enqueue is set to ifp->if_altqenqueue and called by an upper 706 * layer (e.g. ether_output). cbq_enqueue queues the given packet 707 * to the cbq, then invokes the driver's start routine. 708 * 709 * Assumptions: called in splnet 710 * Returns: 0 if the queueing is successful. 711 * ENOBUFS if a packet dropping occurred as a result of 712 * the queueing. 713 */ 714 715 static int 716 cbq_enqueue(ifq, m, pktattr) 717 struct ifaltq *ifq; 718 struct mbuf *m; 719 struct altq_pktattr *pktattr; 720 { 721 cbq_state_t *cbqp = (cbq_state_t *)ifq->altq_disc; 722 struct rm_class *cl; 723 int len; 724 725 /* grab class set by classifier */ 726 if (pktattr == NULL || (cl = pktattr->pattr_class) == NULL) 727 cl = cbqp->ifnp.default_; 728 cl->pktattr_ = pktattr; /* save proto hdr used by ECN */ 729 730 len = m_pktlen(m); 731 if (rmc_queue_packet(cl, m) != 0) { 732 /* drop occurred. some mbuf was freed in rmc_queue_packet. */ 733 PKTCNTR_ADD(&cl->stats_.drop_cnt, len); 734 return (ENOBUFS); 735 } 736 737 /* successfully queued. */ 738 ++cbqp->cbq_qlen; 739 IFQ_INC_LEN(ifq); 740 return (0); 741 } 742 743 static struct mbuf * 744 cbq_dequeue(ifq, op) 745 struct ifaltq *ifq; 746 int op; 747 { 748 cbq_state_t *cbqp = (cbq_state_t *)ifq->altq_disc; 749 struct mbuf *m; 750 751 m = rmc_dequeue_next(&cbqp->ifnp, op); 752 753 if (m && op == ALTDQ_REMOVE) { 754 --cbqp->cbq_qlen; /* decrement # of packets in cbq */ 755 IFQ_DEC_LEN(ifq); 756 757 /* Update the class. */ 758 rmc_update_class_util(&cbqp->ifnp); 759 } 760 return (m); 761 } 762 763 /* 764 * void 765 * cbqrestart(queue_t *) - Restart sending of data. 766 * called from rmc_restart in splnet via timeout after waking up 767 * a suspended class. 768 * Returns: NONE 769 */ 770 771 static void 772 cbqrestart(ifq) 773 struct ifaltq *ifq; 774 { 775 cbq_state_t *cbqp; 776 struct ifnet *ifp; 777 778 if (!ALTQ_IS_ENABLED(ifq)) 779 /* cbq must have been detached */ 780 return; 781 if ((cbqp = (cbq_state_t *)ifq->altq_disc) == NULL) 782 /* should not happen */ 783 return; 784 785 ifp = ifq->altq_ifp; 786 if (ifp->if_start && 787 cbqp->cbq_qlen > 0 && (ifp->if_flags & IFF_OACTIVE) == 0) 788 (*ifp->if_start)(ifp); 789 } 790 791 static void cbq_purge(cbqp) 792 cbq_state_t *cbqp; 793 { 794 struct rm_class *cl; 795 int i; 796 797 for (i = 0; i < CBQ_MAX_CLASSES; i++) 798 if ((cl = cbqp->cbq_class_tbl[i]) != NULL) 799 rmc_dropall(cl); 800 if (ALTQ_IS_ENABLED(cbqp->ifnp.ifq_)) 801 cbqp->ifnp.ifq_->ifq_len = 0; 802 } 803 804 /* 805 * cbq device interface 806 */ 807 808 altqdev_decl(cbq); 809 810 int 811 cbqopen(dev, flag, fmt, p) 812 dev_t dev; 813 int flag, fmt; 814 struct proc *p; 815 { 816 return (0); 817 } 818 819 int 820 cbqclose(dev, flag, fmt, p) 821 dev_t dev; 822 int flag, fmt; 823 struct proc *p; 824 { 825 struct ifnet *ifp; 826 struct cbq_interface iface; 827 int err, error = 0; 828 829 while (cbq_list) { 830 ifp = cbq_list->ifnp.ifq_->altq_ifp; 831 #if defined(__NetBSD__) || defined(__OpenBSD__) 832 sprintf(iface.cbq_ifacename, "%s", ifp->if_xname); 833 #else 834 sprintf(iface.cbq_ifacename, 835 "%s%d", ifp->if_name, ifp->if_unit); 836 #endif 837 err = cbq_ifdetach(&iface); 838 if (err != 0 && error == 0) 839 error = err; 840 } 841 842 return (error); 843 } 844 845 int 846 cbqioctl(dev, cmd, addr, flag, p) 847 dev_t dev; 848 ioctlcmd_t cmd; 849 caddr_t addr; 850 int flag; 851 struct proc *p; 852 { 853 int error = 0; 854 855 /* check cmd for superuser only */ 856 switch (cmd) { 857 case CBQ_GETSTATS: 858 /* currently only command that an ordinary user can call */ 859 break; 860 default: 861 #if (__FreeBSD_version > 400000) 862 error = suser(p); 863 #else 864 error = suser(p->p_ucred, &p->p_acflag); 865 #endif 866 if (error) 867 return (error); 868 break; 869 } 870 871 switch (cmd) { 872 873 case CBQ_ENABLE: 874 error = cbq_set_enable((struct cbq_interface *)addr, ENABLE); 875 break; 876 877 case CBQ_DISABLE: 878 error = cbq_set_enable((struct cbq_interface *)addr, DISABLE); 879 break; 880 881 case CBQ_ADD_FILTER: 882 error = cbq_add_filter((struct cbq_add_filter *)addr); 883 break; 884 885 case CBQ_DEL_FILTER: 886 error = cbq_delete_filter((struct cbq_delete_filter *)addr); 887 break; 888 889 case CBQ_ADD_CLASS: 890 error = cbq_add_class((struct cbq_add_class *)addr); 891 break; 892 893 case CBQ_DEL_CLASS: 894 error = cbq_delete_class((struct cbq_delete_class *)addr); 895 break; 896 897 case CBQ_MODIFY_CLASS: 898 error = cbq_modify_class((struct cbq_modify_class *)addr); 899 break; 900 901 case CBQ_CLEAR_HIERARCHY: 902 error = cbq_clear_hierarchy((struct cbq_interface *)addr); 903 break; 904 905 case CBQ_IF_ATTACH: 906 error = cbq_ifattach((struct cbq_interface *)addr); 907 break; 908 909 case CBQ_IF_DETACH: 910 error = cbq_ifdetach((struct cbq_interface *)addr); 911 break; 912 913 case CBQ_GETSTATS: 914 error = cbq_getstats((struct cbq_getstats *)addr); 915 break; 916 917 default: 918 error = EINVAL; 919 break; 920 } 921 922 return error; 923 } 924 925 #if 0 926 /* for debug */ 927 static void cbq_class_dump(int); 928 929 static void cbq_class_dump(i) 930 int i; 931 { 932 struct rm_class *cl; 933 rm_class_stats_t *s; 934 struct _class_queue_ *q; 935 936 if (cbq_list == NULL) { 937 printf("cbq_class_dump: no cbq_state found\n"); 938 return; 939 } 940 cl = cbq_list->cbq_class_tbl[i]; 941 942 printf("class %d cl=%p\n", i, cl); 943 if (cl != NULL) { 944 s = &cl->stats_; 945 q = cl->q_; 946 947 printf("pri=%d, depth=%d, maxrate=%d, allotment=%d\n", 948 cl->pri_, cl->depth_, cl->maxrate_, cl->allotment_); 949 printf("w_allotment=%d, bytes_alloc=%d, avgidle=%d, maxidle=%d\n", 950 cl->w_allotment_, cl->bytes_alloc_, cl->avgidle_, 951 cl->maxidle_); 952 printf("minidle=%d, offtime=%d, sleeping=%d, leaf=%d\n", 953 cl->minidle_, cl->offtime_, cl->sleeping_, cl->leaf_); 954 printf("handle=%d, depth=%d, packets=%d, bytes=%d\n", 955 s->handle, s->depth, 956 (int)s->xmit_cnt.packets, (int)s->xmit_cnt.bytes); 957 printf("over=%d\n, borrows=%d, drops=%d, overactions=%d, delays=%d\n", 958 s->over, s->borrows, (int)s->drop_cnt.packets, 959 s->overactions, s->delays); 960 printf("tail=%p, head=%p, qlen=%d, qlim=%d, qthresh=%d,qtype=%d\n", 961 q->tail_, q->head_, q->qlen_, q->qlim_, 962 q->qthresh_, q->qtype_); 963 } 964 } 965 #endif /* 0 */ 966 967 #ifdef KLD_MODULE 968 969 static struct altqsw cbq_sw = 970 {"cbq", cbqopen, cbqclose, cbqioctl}; 971 972 ALTQ_MODULE(altq_cbq, ALTQT_CBQ, &cbq_sw); 973 974 #endif /* KLD_MODULE */ 975 976 #endif /* ALTQ_CBQ */ 977