1 /* $FreeBSD: stable/9/sys/contrib/altq/altq/altq_priq.c 219457 2011-03-10 18:49:15Z jkim $ */
2 /* $KAME: altq_priq.c,v 1.11 2003/09/17 14:23:25 kjc 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 * priority queue
30 */
31
32 #if defined(__FreeBSD__) || defined(__NetBSD__)
33 #include "opt_altq.h"
34 #include "opt_inet.h"
35 #ifdef __FreeBSD__
36 #include "opt_inet6.h"
37 #endif
38 #endif /* __FreeBSD__ || __NetBSD__ */
39
40 #ifdef ALTQ_PRIQ /* priq is enabled by ALTQ_PRIQ option in opt_altq.h */
41
42 #include <sys/param.h>
43 #include <sys/malloc.h>
44 #include <sys/mbuf.h>
45 #include <sys/socket.h>
46 #include <sys/sockio.h>
47 #include <sys/systm.h>
48 #include <sys/proc.h>
49 #include <sys/errno.h>
50 #include <sys/kernel.h>
51 #include <sys/queue.h>
52
53 #include <net/if.h>
54 #include <netinet/in.h>
55
56 #include <net/pfvar.h>
57 #include <altq/altq.h>
58 #ifdef ALTQ3_COMPAT
59 #include <altq/altq_conf.h>
60 #endif
61 #include <altq/altq_priq.h>
62
63 /*
64 * function prototypes
65 */
66 #ifdef ALTQ3_COMPAT
67 static struct priq_if *priq_attach(struct ifaltq *, u_int);
68 static int priq_detach(struct priq_if *);
69 #endif
70 static int priq_clear_interface(struct priq_if *);
71 static int priq_request(struct ifaltq *, int, void *);
72 static void priq_purge(struct priq_if *);
73 static struct priq_class *priq_class_create(struct priq_if *, int, int, int,
74 int);
75 static int priq_class_destroy(struct priq_class *);
76 static int priq_enqueue(struct ifaltq *, struct mbuf *, struct altq_pktattr *);
77 static struct mbuf *priq_dequeue(struct ifaltq *, int);
78
79 static int priq_addq(struct priq_class *, struct mbuf *);
80 static struct mbuf *priq_getq(struct priq_class *);
81 static struct mbuf *priq_pollq(struct priq_class *);
82 static void priq_purgeq(struct priq_class *);
83
84 #ifdef ALTQ3_COMPAT
85 static int priqcmd_if_attach(struct priq_interface *);
86 static int priqcmd_if_detach(struct priq_interface *);
87 static int priqcmd_add_class(struct priq_add_class *);
88 static int priqcmd_delete_class(struct priq_delete_class *);
89 static int priqcmd_modify_class(struct priq_modify_class *);
90 static int priqcmd_add_filter(struct priq_add_filter *);
91 static int priqcmd_delete_filter(struct priq_delete_filter *);
92 static int priqcmd_class_stats(struct priq_class_stats *);
93 #endif /* ALTQ3_COMPAT */
94
95 static void get_class_stats(struct priq_classstats *, struct priq_class *);
96 static struct priq_class *clh_to_clp(struct priq_if *, u_int32_t);
97
98 #ifdef ALTQ3_COMPAT
99 altqdev_decl(priq);
100
101 /* pif_list keeps all priq_if's allocated. */
102 static struct priq_if *pif_list = NULL;
103 #endif /* ALTQ3_COMPAT */
104
105 int
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 #ifdef __NetBSD__
114 s = splnet();
115 #else
116 s = splimp();
117 #endif
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
priq_add_altq(struct pf_altq * a)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),
136 M_DEVBUF, M_WAITOK);
137 if (pif == NULL)
138 return (ENOMEM);
139 bzero(pif, sizeof(struct priq_if));
140 pif->pif_bandwidth = a->ifbandwidth;
141 pif->pif_maxpri = -1;
142 pif->pif_ifq = &ifp->if_snd;
143
144 /* keep the state in pf_altq */
145 a->altq_disc = pif;
146
147 return (0);
148 }
149
150 int
priq_remove_altq(struct pf_altq * a)151 priq_remove_altq(struct pf_altq *a)
152 {
153 struct priq_if *pif;
154
155 if ((pif = a->altq_disc) == NULL)
156 return (EINVAL);
157 a->altq_disc = NULL;
158
159 (void)priq_clear_interface(pif);
160
161 free(pif, M_DEVBUF);
162 return (0);
163 }
164
165 int
priq_add_queue(struct pf_altq * a)166 priq_add_queue(struct pf_altq *a)
167 {
168 struct priq_if *pif;
169 struct priq_class *cl;
170
171 if ((pif = a->altq_disc) == NULL)
172 return (EINVAL);
173
174 /* check parameters */
175 if (a->priority >= PRIQ_MAXPRI)
176 return (EINVAL);
177 if (a->qid == 0)
178 return (EINVAL);
179 if (pif->pif_classes[a->priority] != NULL)
180 return (EBUSY);
181 if (clh_to_clp(pif, a->qid) != NULL)
182 return (EBUSY);
183
184 cl = priq_class_create(pif, a->priority, a->qlimit,
185 a->pq_u.priq_opts.flags, a->qid);
186 if (cl == NULL)
187 return (ENOMEM);
188
189 return (0);
190 }
191
192 int
priq_remove_queue(struct pf_altq * a)193 priq_remove_queue(struct pf_altq *a)
194 {
195 struct priq_if *pif;
196 struct priq_class *cl;
197
198 if ((pif = a->altq_disc) == NULL)
199 return (EINVAL);
200
201 if ((cl = clh_to_clp(pif, a->qid)) == NULL)
202 return (EINVAL);
203
204 return (priq_class_destroy(cl));
205 }
206
207 int
priq_getqstats(struct pf_altq * a,void * ubuf,int * nbytes)208 priq_getqstats(struct pf_altq *a, void *ubuf, int *nbytes)
209 {
210 struct priq_if *pif;
211 struct priq_class *cl;
212 struct priq_classstats stats;
213 int error = 0;
214
215 if ((pif = altq_lookup(a->ifname, ALTQT_PRIQ)) == NULL)
216 return (EBADF);
217
218 if ((cl = clh_to_clp(pif, a->qid)) == NULL)
219 return (EINVAL);
220
221 if (*nbytes < sizeof(stats))
222 return (EINVAL);
223
224 get_class_stats(&stats, cl);
225
226 if ((error = copyout((caddr_t)&stats, ubuf, sizeof(stats))) != 0)
227 return (error);
228 *nbytes = sizeof(stats);
229 return (0);
230 }
231
232 /*
233 * bring the interface back to the initial state by discarding
234 * all the filters and classes.
235 */
236 static int
priq_clear_interface(struct priq_if * pif)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
priq_request(struct ifaltq * ifq,int req,void * arg)256 priq_request(struct ifaltq *ifq, int req, void *arg)
257 {
258 struct priq_if *pif = (struct priq_if *)ifq->altq_disc;
259
260 IFQ_LOCK_ASSERT(ifq);
261
262 switch (req) {
263 case ALTRQ_PURGE:
264 priq_purge(pif);
265 break;
266 }
267 return (0);
268 }
269
270 /* discard all the queued packets on the interface */
271 static void
priq_purge(struct priq_if * pif)272 priq_purge(struct priq_if *pif)
273 {
274 struct priq_class *cl;
275 int pri;
276
277 for (pri = 0; pri <= pif->pif_maxpri; pri++) {
278 if ((cl = pif->pif_classes[pri]) != NULL && !qempty(cl->cl_q))
279 priq_purgeq(cl);
280 }
281 if (ALTQ_IS_ENABLED(pif->pif_ifq))
282 pif->pif_ifq->ifq_len = 0;
283 }
284
285 static struct priq_class *
priq_class_create(struct priq_if * pif,int pri,int qlimit,int flags,int qid)286 priq_class_create(struct priq_if *pif, int pri, int qlimit, int flags, int qid)
287 {
288 struct priq_class *cl;
289 int s;
290
291 #ifndef ALTQ_RED
292 if (flags & PRCF_RED) {
293 #ifdef ALTQ_DEBUG
294 printf("priq_class_create: RED not configured for PRIQ!\n");
295 #endif
296 return (NULL);
297 }
298 #endif
299
300 if ((cl = pif->pif_classes[pri]) != NULL) {
301 /* modify the class instead of creating a new one */
302 #ifdef __NetBSD__
303 s = splnet();
304 #else
305 s = splimp();
306 #endif
307 IFQ_LOCK(cl->cl_pif->pif_ifq);
308 if (!qempty(cl->cl_q))
309 priq_purgeq(cl);
310 IFQ_UNLOCK(cl->cl_pif->pif_ifq);
311 splx(s);
312 #ifdef ALTQ_RIO
313 if (q_is_rio(cl->cl_q))
314 rio_destroy((rio_t *)cl->cl_red);
315 #endif
316 #ifdef ALTQ_RED
317 if (q_is_red(cl->cl_q))
318 red_destroy(cl->cl_red);
319 #endif
320 } else {
321 cl = malloc(sizeof(struct priq_class),
322 M_DEVBUF, M_WAITOK);
323 if (cl == NULL)
324 return (NULL);
325 bzero(cl, sizeof(struct priq_class));
326
327 cl->cl_q = malloc(sizeof(class_queue_t),
328 M_DEVBUF, M_WAITOK);
329 if (cl->cl_q == NULL)
330 goto err_ret;
331 bzero(cl->cl_q, sizeof(class_queue_t));
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 cl->cl_flags = flags;
343 cl->cl_pri = pri;
344 if (pri > pif->pif_maxpri)
345 pif->pif_maxpri = pri;
346 cl->cl_pif = pif;
347 cl->cl_handle = qid;
348
349 #ifdef ALTQ_RED
350 if (flags & (PRCF_RED|PRCF_RIO)) {
351 int red_flags, red_pkttime;
352
353 red_flags = 0;
354 if (flags & PRCF_ECN)
355 red_flags |= REDF_ECN;
356 #ifdef ALTQ_RIO
357 if (flags & PRCF_CLEARDSCP)
358 red_flags |= RIOF_CLEARDSCP;
359 #endif
360 if (pif->pif_bandwidth < 8)
361 red_pkttime = 1000 * 1000 * 1000; /* 1 sec */
362 else
363 red_pkttime = (int64_t)pif->pif_ifq->altq_ifp->if_mtu
364 * 1000 * 1000 * 1000 / (pif->pif_bandwidth / 8);
365 #ifdef ALTQ_RIO
366 if (flags & PRCF_RIO) {
367 cl->cl_red = (red_t *)rio_alloc(0, NULL,
368 red_flags, red_pkttime);
369 if (cl->cl_red != NULL)
370 qtype(cl->cl_q) = Q_RIO;
371 } else
372 #endif
373 if (flags & PRCF_RED) {
374 cl->cl_red = red_alloc(0, 0,
375 qlimit(cl->cl_q) * 10/100,
376 qlimit(cl->cl_q) * 30/100,
377 red_flags, red_pkttime);
378 if (cl->cl_red != NULL)
379 qtype(cl->cl_q) = Q_RED;
380 }
381 }
382 #endif /* ALTQ_RED */
383
384 return (cl);
385
386 err_ret:
387 if (cl->cl_red != NULL) {
388 #ifdef ALTQ_RIO
389 if (q_is_rio(cl->cl_q))
390 rio_destroy((rio_t *)cl->cl_red);
391 #endif
392 #ifdef ALTQ_RED
393 if (q_is_red(cl->cl_q))
394 red_destroy(cl->cl_red);
395 #endif
396 }
397 if (cl->cl_q != NULL)
398 free(cl->cl_q, M_DEVBUF);
399 free(cl, M_DEVBUF);
400 return (NULL);
401 }
402
403 static int
priq_class_destroy(struct priq_class * cl)404 priq_class_destroy(struct priq_class *cl)
405 {
406 struct priq_if *pif;
407 int s, pri;
408
409 #ifdef __NetBSD__
410 s = splnet();
411 #else
412 s = splimp();
413 #endif
414 IFQ_LOCK(cl->cl_pif->pif_ifq);
415
416 #ifdef ALTQ3_CLFIER_COMPAT
417 /* delete filters referencing to this class */
418 acc_discard_filters(&cl->cl_pif->pif_classifier, cl, 0);
419 #endif
420
421 if (!qempty(cl->cl_q))
422 priq_purgeq(cl);
423
424 pif = cl->cl_pif;
425 pif->pif_classes[cl->cl_pri] = NULL;
426 if (pif->pif_maxpri == cl->cl_pri) {
427 for (pri = cl->cl_pri; pri >= 0; pri--)
428 if (pif->pif_classes[pri] != NULL) {
429 pif->pif_maxpri = pri;
430 break;
431 }
432 if (pri < 0)
433 pif->pif_maxpri = -1;
434 }
435 IFQ_UNLOCK(cl->cl_pif->pif_ifq);
436 splx(s);
437
438 if (cl->cl_red != NULL) {
439 #ifdef ALTQ_RIO
440 if (q_is_rio(cl->cl_q))
441 rio_destroy((rio_t *)cl->cl_red);
442 #endif
443 #ifdef ALTQ_RED
444 if (q_is_red(cl->cl_q))
445 red_destroy(cl->cl_red);
446 #endif
447 }
448 free(cl->cl_q, M_DEVBUF);
449 free(cl, M_DEVBUF);
450 return (0);
451 }
452
453 /*
454 * priq_enqueue is an enqueue function to be registered to
455 * (*altq_enqueue) in struct ifaltq.
456 */
457 static int
priq_enqueue(struct ifaltq * ifq,struct mbuf * m,struct altq_pktattr * pktattr)458 priq_enqueue(struct ifaltq *ifq, struct mbuf *m, struct altq_pktattr *pktattr)
459 {
460 struct priq_if *pif = (struct priq_if *)ifq->altq_disc;
461 struct priq_class *cl;
462 struct pf_mtag *t;
463 int len;
464
465 IFQ_LOCK_ASSERT(ifq);
466
467 /* grab class set by classifier */
468 if ((m->m_flags & M_PKTHDR) == 0) {
469 /* should not happen */
470 printf("altq: packet for %s does not have pkthdr\n",
471 ifq->altq_ifp->if_xname);
472 m_freem(m);
473 return (ENOBUFS);
474 }
475 cl = NULL;
476 if ((t = pf_find_mtag(m)) != NULL)
477 cl = clh_to_clp(pif, t->qid);
478 #ifdef ALTQ3_COMPAT
479 else if ((ifq->altq_flags & ALTQF_CLASSIFY) && pktattr != NULL)
480 cl = pktattr->pattr_class;
481 #endif
482 if (cl == NULL) {
483 cl = pif->pif_default;
484 if (cl == NULL) {
485 m_freem(m);
486 return (ENOBUFS);
487 }
488 }
489 #ifdef ALTQ3_COMPAT
490 if (pktattr != NULL)
491 cl->cl_pktattr = pktattr; /* save proto hdr used by ECN */
492 else
493 #endif
494 cl->cl_pktattr = NULL;
495 len = m_pktlen(m);
496 if (priq_addq(cl, m) != 0) {
497 /* drop occurred. mbuf was freed in priq_addq. */
498 PKTCNTR_ADD(&cl->cl_dropcnt, len);
499 return (ENOBUFS);
500 }
501 IFQ_INC_LEN(ifq);
502
503 /* successfully queued. */
504 return (0);
505 }
506
507 /*
508 * priq_dequeue is a dequeue function to be registered to
509 * (*altq_dequeue) in struct ifaltq.
510 *
511 * note: ALTDQ_POLL returns the next packet without removing the packet
512 * from the queue. ALTDQ_REMOVE is a normal dequeue operation.
513 * ALTDQ_REMOVE must return the same packet if called immediately
514 * after ALTDQ_POLL.
515 */
516 static struct mbuf *
priq_dequeue(struct ifaltq * ifq,int op)517 priq_dequeue(struct ifaltq *ifq, int op)
518 {
519 struct priq_if *pif = (struct priq_if *)ifq->altq_disc;
520 struct priq_class *cl;
521 struct mbuf *m;
522 int pri;
523
524 IFQ_LOCK_ASSERT(ifq);
525
526 if (IFQ_IS_EMPTY(ifq))
527 /* no packet in the queue */
528 return (NULL);
529
530 for (pri = pif->pif_maxpri; pri >= 0; pri--) {
531 if ((cl = pif->pif_classes[pri]) != NULL &&
532 !qempty(cl->cl_q)) {
533 if (op == ALTDQ_POLL)
534 return (priq_pollq(cl));
535
536 m = priq_getq(cl);
537 if (m != NULL) {
538 IFQ_DEC_LEN(ifq);
539 if (qempty(cl->cl_q))
540 cl->cl_period++;
541 PKTCNTR_ADD(&cl->cl_xmitcnt, m_pktlen(m));
542 }
543 return (m);
544 }
545 }
546 return (NULL);
547 }
548
549 static int
priq_addq(struct priq_class * cl,struct mbuf * m)550 priq_addq(struct priq_class *cl, struct mbuf *m)
551 {
552
553 #ifdef ALTQ_RIO
554 if (q_is_rio(cl->cl_q))
555 return rio_addq((rio_t *)cl->cl_red, cl->cl_q, m,
556 cl->cl_pktattr);
557 #endif
558 #ifdef ALTQ_RED
559 if (q_is_red(cl->cl_q))
560 return red_addq(cl->cl_red, cl->cl_q, m, cl->cl_pktattr);
561 #endif
562 if (qlen(cl->cl_q) >= qlimit(cl->cl_q)) {
563 m_freem(m);
564 return (-1);
565 }
566
567 if (cl->cl_flags & PRCF_CLEARDSCP)
568 write_dsfield(m, cl->cl_pktattr, 0);
569
570 _addq(cl->cl_q, m);
571
572 return (0);
573 }
574
575 static struct mbuf *
priq_getq(struct priq_class * cl)576 priq_getq(struct priq_class *cl)
577 {
578 #ifdef ALTQ_RIO
579 if (q_is_rio(cl->cl_q))
580 return rio_getq((rio_t *)cl->cl_red, cl->cl_q);
581 #endif
582 #ifdef ALTQ_RED
583 if (q_is_red(cl->cl_q))
584 return red_getq(cl->cl_red, cl->cl_q);
585 #endif
586 return _getq(cl->cl_q);
587 }
588
589 static struct mbuf *
priq_pollq(cl)590 priq_pollq(cl)
591 struct priq_class *cl;
592 {
593 return qhead(cl->cl_q);
594 }
595
596 static void
priq_purgeq(struct priq_class * cl)597 priq_purgeq(struct priq_class *cl)
598 {
599 struct mbuf *m;
600
601 if (qempty(cl->cl_q))
602 return;
603
604 while ((m = _getq(cl->cl_q)) != NULL) {
605 PKTCNTR_ADD(&cl->cl_dropcnt, m_pktlen(m));
606 m_freem(m);
607 }
608 ASSERT(qlen(cl->cl_q) == 0);
609 }
610
611 static void
get_class_stats(struct priq_classstats * sp,struct priq_class * cl)612 get_class_stats(struct priq_classstats *sp, struct priq_class *cl)
613 {
614 sp->class_handle = cl->cl_handle;
615 sp->qlength = qlen(cl->cl_q);
616 sp->qlimit = qlimit(cl->cl_q);
617 sp->period = cl->cl_period;
618 sp->xmitcnt = cl->cl_xmitcnt;
619 sp->dropcnt = cl->cl_dropcnt;
620
621 sp->qtype = qtype(cl->cl_q);
622 #ifdef ALTQ_RED
623 if (q_is_red(cl->cl_q))
624 red_getstats(cl->cl_red, &sp->red[0]);
625 #endif
626 #ifdef ALTQ_RIO
627 if (q_is_rio(cl->cl_q))
628 rio_getstats((rio_t *)cl->cl_red, &sp->red[0]);
629 #endif
630
631 }
632
633 /* convert a class handle to the corresponding class pointer */
634 static struct priq_class *
clh_to_clp(struct priq_if * pif,u_int32_t chandle)635 clh_to_clp(struct priq_if *pif, u_int32_t chandle)
636 {
637 struct priq_class *cl;
638 int idx;
639
640 if (chandle == 0)
641 return (NULL);
642
643 for (idx = pif->pif_maxpri; idx >= 0; idx--)
644 if ((cl = pif->pif_classes[idx]) != NULL &&
645 cl->cl_handle == chandle)
646 return (cl);
647
648 return (NULL);
649 }
650
651
652 #ifdef ALTQ3_COMPAT
653
654 static struct priq_if *
priq_attach(ifq,bandwidth)655 priq_attach(ifq, bandwidth)
656 struct ifaltq *ifq;
657 u_int bandwidth;
658 {
659 struct priq_if *pif;
660
661 pif = malloc(sizeof(struct priq_if),
662 M_DEVBUF, M_WAITOK);
663 if (pif == NULL)
664 return (NULL);
665 bzero(pif, sizeof(struct priq_if));
666 pif->pif_bandwidth = bandwidth;
667 pif->pif_maxpri = -1;
668 pif->pif_ifq = ifq;
669
670 /* add this state to the priq list */
671 pif->pif_next = pif_list;
672 pif_list = pif;
673
674 return (pif);
675 }
676
677 static int
priq_detach(pif)678 priq_detach(pif)
679 struct priq_if *pif;
680 {
681 (void)priq_clear_interface(pif);
682
683 /* remove this interface from the pif list */
684 if (pif_list == pif)
685 pif_list = pif->pif_next;
686 else {
687 struct priq_if *p;
688
689 for (p = pif_list; p != NULL; p = p->pif_next)
690 if (p->pif_next == pif) {
691 p->pif_next = pif->pif_next;
692 break;
693 }
694 ASSERT(p != NULL);
695 }
696
697 free(pif, M_DEVBUF);
698 return (0);
699 }
700
701 /*
702 * priq device interface
703 */
704 int
priqopen(dev,flag,fmt,p)705 priqopen(dev, flag, fmt, p)
706 dev_t dev;
707 int flag, fmt;
708 #if (__FreeBSD_version > 500000)
709 struct thread *p;
710 #else
711 struct proc *p;
712 #endif
713 {
714 /* everything will be done when the queueing scheme is attached. */
715 return 0;
716 }
717
718 int
priqclose(dev,flag,fmt,p)719 priqclose(dev, flag, fmt, p)
720 dev_t dev;
721 int flag, fmt;
722 #if (__FreeBSD_version > 500000)
723 struct thread *p;
724 #else
725 struct proc *p;
726 #endif
727 {
728 struct priq_if *pif;
729 int err, error = 0;
730
731 while ((pif = pif_list) != NULL) {
732 /* destroy all */
733 if (ALTQ_IS_ENABLED(pif->pif_ifq))
734 altq_disable(pif->pif_ifq);
735
736 err = altq_detach(pif->pif_ifq);
737 if (err == 0)
738 err = priq_detach(pif);
739 if (err != 0 && error == 0)
740 error = err;
741 }
742
743 return error;
744 }
745
746 int
priqioctl(dev,cmd,addr,flag,p)747 priqioctl(dev, cmd, addr, flag, p)
748 dev_t dev;
749 ioctlcmd_t cmd;
750 caddr_t addr;
751 int flag;
752 #if (__FreeBSD_version > 500000)
753 struct thread *p;
754 #else
755 struct proc *p;
756 #endif
757 {
758 struct priq_if *pif;
759 struct priq_interface *ifacep;
760 int error = 0;
761
762 /* check super-user privilege */
763 switch (cmd) {
764 case PRIQ_GETSTATS:
765 break;
766 default:
767 #if (__FreeBSD_version > 700000)
768 if ((error = priv_check(p, PRIV_ALTQ_MANAGE)) != 0)
769 return (error);
770 #elsif (__FreeBSD_version > 400000)
771 if ((error = suser(p)) != 0)
772 return (error);
773 #else
774 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
775 return (error);
776 #endif
777 break;
778 }
779
780 switch (cmd) {
781
782 case PRIQ_IF_ATTACH:
783 error = priqcmd_if_attach((struct priq_interface *)addr);
784 break;
785
786 case PRIQ_IF_DETACH:
787 error = priqcmd_if_detach((struct priq_interface *)addr);
788 break;
789
790 case PRIQ_ENABLE:
791 case PRIQ_DISABLE:
792 case PRIQ_CLEAR:
793 ifacep = (struct priq_interface *)addr;
794 if ((pif = altq_lookup(ifacep->ifname,
795 ALTQT_PRIQ)) == NULL) {
796 error = EBADF;
797 break;
798 }
799
800 switch (cmd) {
801 case PRIQ_ENABLE:
802 if (pif->pif_default == NULL) {
803 #ifdef ALTQ_DEBUG
804 printf("priq: no default class\n");
805 #endif
806 error = EINVAL;
807 break;
808 }
809 error = altq_enable(pif->pif_ifq);
810 break;
811
812 case PRIQ_DISABLE:
813 error = altq_disable(pif->pif_ifq);
814 break;
815
816 case PRIQ_CLEAR:
817 priq_clear_interface(pif);
818 break;
819 }
820 break;
821
822 case PRIQ_ADD_CLASS:
823 error = priqcmd_add_class((struct priq_add_class *)addr);
824 break;
825
826 case PRIQ_DEL_CLASS:
827 error = priqcmd_delete_class((struct priq_delete_class *)addr);
828 break;
829
830 case PRIQ_MOD_CLASS:
831 error = priqcmd_modify_class((struct priq_modify_class *)addr);
832 break;
833
834 case PRIQ_ADD_FILTER:
835 error = priqcmd_add_filter((struct priq_add_filter *)addr);
836 break;
837
838 case PRIQ_DEL_FILTER:
839 error = priqcmd_delete_filter((struct priq_delete_filter *)addr);
840 break;
841
842 case PRIQ_GETSTATS:
843 error = priqcmd_class_stats((struct priq_class_stats *)addr);
844 break;
845
846 default:
847 error = EINVAL;
848 break;
849 }
850 return error;
851 }
852
853 static int
priqcmd_if_attach(ap)854 priqcmd_if_attach(ap)
855 struct priq_interface *ap;
856 {
857 struct priq_if *pif;
858 struct ifnet *ifp;
859 int error;
860
861 if ((ifp = ifunit(ap->ifname)) == NULL)
862 return (ENXIO);
863
864 if ((pif = priq_attach(&ifp->if_snd, ap->arg)) == NULL)
865 return (ENOMEM);
866
867 /*
868 * set PRIQ to this ifnet structure.
869 */
870 if ((error = altq_attach(&ifp->if_snd, ALTQT_PRIQ, pif,
871 priq_enqueue, priq_dequeue, priq_request,
872 &pif->pif_classifier, acc_classify)) != 0)
873 (void)priq_detach(pif);
874
875 return (error);
876 }
877
878 static int
priqcmd_if_detach(ap)879 priqcmd_if_detach(ap)
880 struct priq_interface *ap;
881 {
882 struct priq_if *pif;
883 int error;
884
885 if ((pif = altq_lookup(ap->ifname, ALTQT_PRIQ)) == NULL)
886 return (EBADF);
887
888 if (ALTQ_IS_ENABLED(pif->pif_ifq))
889 altq_disable(pif->pif_ifq);
890
891 if ((error = altq_detach(pif->pif_ifq)))
892 return (error);
893
894 return priq_detach(pif);
895 }
896
897 static int
priqcmd_add_class(ap)898 priqcmd_add_class(ap)
899 struct priq_add_class *ap;
900 {
901 struct priq_if *pif;
902 struct priq_class *cl;
903 int qid;
904
905 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL)
906 return (EBADF);
907
908 if (ap->pri < 0 || ap->pri >= PRIQ_MAXPRI)
909 return (EINVAL);
910 if (pif->pif_classes[ap->pri] != NULL)
911 return (EBUSY);
912
913 qid = ap->pri + 1;
914 if ((cl = priq_class_create(pif, ap->pri,
915 ap->qlimit, ap->flags, qid)) == NULL)
916 return (ENOMEM);
917
918 /* return a class handle to the user */
919 ap->class_handle = cl->cl_handle;
920
921 return (0);
922 }
923
924 static int
priqcmd_delete_class(ap)925 priqcmd_delete_class(ap)
926 struct priq_delete_class *ap;
927 {
928 struct priq_if *pif;
929 struct priq_class *cl;
930
931 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL)
932 return (EBADF);
933
934 if ((cl = clh_to_clp(pif, ap->class_handle)) == NULL)
935 return (EINVAL);
936
937 return priq_class_destroy(cl);
938 }
939
940 static int
priqcmd_modify_class(ap)941 priqcmd_modify_class(ap)
942 struct priq_modify_class *ap;
943 {
944 struct priq_if *pif;
945 struct priq_class *cl;
946
947 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL)
948 return (EBADF);
949
950 if (ap->pri < 0 || ap->pri >= PRIQ_MAXPRI)
951 return (EINVAL);
952
953 if ((cl = clh_to_clp(pif, ap->class_handle)) == NULL)
954 return (EINVAL);
955
956 /*
957 * if priority is changed, move the class to the new priority
958 */
959 if (pif->pif_classes[ap->pri] != cl) {
960 if (pif->pif_classes[ap->pri] != NULL)
961 return (EEXIST);
962 pif->pif_classes[cl->cl_pri] = NULL;
963 pif->pif_classes[ap->pri] = cl;
964 cl->cl_pri = ap->pri;
965 }
966
967 /* call priq_class_create to change class parameters */
968 if ((cl = priq_class_create(pif, ap->pri,
969 ap->qlimit, ap->flags, ap->class_handle)) == NULL)
970 return (ENOMEM);
971 return 0;
972 }
973
974 static int
priqcmd_add_filter(ap)975 priqcmd_add_filter(ap)
976 struct priq_add_filter *ap;
977 {
978 struct priq_if *pif;
979 struct priq_class *cl;
980
981 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL)
982 return (EBADF);
983
984 if ((cl = clh_to_clp(pif, ap->class_handle)) == NULL)
985 return (EINVAL);
986
987 return acc_add_filter(&pif->pif_classifier, &ap->filter,
988 cl, &ap->filter_handle);
989 }
990
991 static int
priqcmd_delete_filter(ap)992 priqcmd_delete_filter(ap)
993 struct priq_delete_filter *ap;
994 {
995 struct priq_if *pif;
996
997 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL)
998 return (EBADF);
999
1000 return acc_delete_filter(&pif->pif_classifier,
1001 ap->filter_handle);
1002 }
1003
1004 static int
priqcmd_class_stats(ap)1005 priqcmd_class_stats(ap)
1006 struct priq_class_stats *ap;
1007 {
1008 struct priq_if *pif;
1009 struct priq_class *cl;
1010 struct priq_classstats stats, *usp;
1011 int pri, error;
1012
1013 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL)
1014 return (EBADF);
1015
1016 ap->maxpri = pif->pif_maxpri;
1017
1018 /* then, read the next N classes in the tree */
1019 usp = ap->stats;
1020 for (pri = 0; pri <= pif->pif_maxpri; pri++) {
1021 cl = pif->pif_classes[pri];
1022 if (cl != NULL)
1023 get_class_stats(&stats, cl);
1024 else
1025 bzero(&stats, sizeof(stats));
1026 if ((error = copyout((caddr_t)&stats, (caddr_t)usp++,
1027 sizeof(stats))) != 0)
1028 return (error);
1029 }
1030 return (0);
1031 }
1032
1033 #ifdef KLD_MODULE
1034
1035 static struct altqsw priq_sw =
1036 {"priq", priqopen, priqclose, priqioctl};
1037
1038 ALTQ_MODULE(altq_priq, ALTQT_PRIQ, &priq_sw);
1039 MODULE_DEPEND(altq_priq, altq_red, 1, 1, 1);
1040 MODULE_DEPEND(altq_priq, altq_rio, 1, 1, 1);
1041
1042 #endif /* KLD_MODULE */
1043
1044 #endif /* ALTQ3_COMPAT */
1045 #endif /* ALTQ_PRIQ */
1046