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
priq_pfattach(struct pf_altq * a)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
priq_add_altq(struct pf_altq * a)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
priq_remove_altq(struct pf_altq * a)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
priq_add_queue(struct pf_altq * a)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
priq_remove_queue(struct pf_altq * a)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
priq_getqstats(struct pf_altq * a,void * ubuf,int * nbytes)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
priq_clear_interface(struct priq_if * pif)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
priq_request(struct ifaltq * ifq,int req,void * arg)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
priq_purge(struct priq_if * pif)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 *
priq_class_create(struct priq_if * pif,int pri,int qlimit,int flags,int qid)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
priq_class_destroy(struct priq_class * cl)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
priq_enqueue(struct ifaltq * ifq,struct mbuf * m,struct altq_pktattr * pktattr)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 *
priq_dequeue(struct ifaltq * ifq,int op)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
priq_addq(struct priq_class * cl,struct mbuf * m)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 *
priq_getq(struct priq_class * cl)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 *
priq_pollq(cl)612 priq_pollq(cl)
613 struct priq_class *cl;
614 {
615 return qhead(cl->cl_q);
616 }
617
618 static void
priq_purgeq(struct priq_class * cl)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
get_class_stats(struct priq_classstats * sp,struct priq_class * cl)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 *
clh_to_clp(struct priq_if * pif,u_int32_t chandle)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 *
priq_attach(ifq,bandwidth)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
priq_detach(pif)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
priqopen(dev,flag,fmt,p)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
priqclose(dev,flag,fmt,p)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
priqioctl(dev,cmd,addr,flag,p)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
priqcmd_if_attach(ap)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
priqcmd_if_detach(ap)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
priqcmd_add_class(ap)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
priqcmd_delete_class(ap)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
priqcmd_modify_class(ap)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
priqcmd_add_filter(ap)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
priqcmd_delete_filter(ap)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
priqcmd_class_stats(ap)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