1 /* $NetBSD: altq_priq.c,v 1.29 2025/01/08 13:00:04 joe Exp $ */
2 /* $KAME: altq_priq.c,v 1.13 2005/04/13 03:44:25 suz Exp $ */
3 /*
4 * Copyright (C) 2000-2003
5 * Sony Computer Science Laboratories Inc. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY SONY CSL AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL SONY CSL OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 /*
30 * priority queue
31 */
32
33 #include <sys/cdefs.h>
34 __KERNEL_RCSID(0, "$NetBSD: altq_priq.c,v 1.29 2025/01/08 13:00:04 joe Exp $");
35
36 #ifdef _KERNEL_OPT
37 #include "opt_altq.h"
38 #include "opt_inet.h"
39 #include "pf.h"
40 #endif
41
42 #ifdef ALTQ_PRIQ /* priq is enabled by ALTQ_PRIQ option in opt_altq.h */
43
44 #include <sys/param.h>
45 #include <sys/malloc.h>
46 #include <sys/mbuf.h>
47 #include <sys/socket.h>
48 #include <sys/sockio.h>
49 #include <sys/systm.h>
50 #include <sys/proc.h>
51 #include <sys/errno.h>
52 #include <sys/kernel.h>
53 #include <sys/queue.h>
54 #include <sys/kauth.h>
55
56 #include <net/if.h>
57 #include <netinet/in.h>
58
59 #if NPF > 0
60 #include <net/pfvar.h>
61 #endif
62 #include <altq/altq.h>
63 #include <altq/altq_conf.h>
64 #include <altq/altq_priq.h>
65
66 /*
67 * function prototypes
68 */
69 #ifdef ALTQ3_COMPAT
70 static struct priq_if *priq_attach(struct ifaltq *, u_int);
71 static void priq_detach(struct priq_if *);
72 #endif
73 static int priq_clear_interface(struct priq_if *);
74 static int priq_request(struct ifaltq *, int, void *);
75 static void priq_purge(struct priq_if *);
76 static struct priq_class *priq_class_create(struct priq_if *, int, int, int,
77 int);
78 static int priq_class_destroy(struct priq_class *);
79 static int priq_enqueue(struct ifaltq *, struct mbuf *);
80 static struct mbuf *priq_dequeue(struct ifaltq *, int);
81
82 static int priq_addq(struct priq_class *, struct mbuf *);
83 static struct mbuf *priq_getq(struct priq_class *);
84 static struct mbuf *priq_pollq(struct priq_class *);
85 static void priq_purgeq(struct priq_class *);
86
87 #ifdef ALTQ3_COMPAT
88 static int priqcmd_if_attach(struct priq_interface *);
89 static int priqcmd_if_detach(struct priq_interface *);
90 static int priqcmd_add_class(struct priq_add_class *);
91 static int priqcmd_delete_class(struct priq_delete_class *);
92 static int priqcmd_modify_class(struct priq_modify_class *);
93 static int priqcmd_add_filter(struct priq_add_filter *);
94 static int priqcmd_delete_filter(struct priq_delete_filter *);
95 static int priqcmd_class_stats(struct priq_class_stats *);
96 #endif /* ALTQ3_COMPAT */
97
98 static void get_class_stats(struct priq_classstats *, struct priq_class *);
99 static struct priq_class *clh_to_clp(struct priq_if *, u_int32_t);
100
101 #ifdef ALTQ3_COMPAT
102 altqdev_decl(priq);
103
104 /* pif_list keeps all priq_if's allocated. */
105 static struct priq_if *pif_list = NULL;
106 #endif /* ALTQ3_COMPAT */
107
108 #if NPF > 0
109 int
priq_pfattach(struct pf_altq * a)110 priq_pfattach(struct pf_altq *a)
111 {
112 struct ifnet *ifp;
113 int s, error;
114
115 if ((ifp = ifunit(a->ifname)) == NULL || a->altq_disc == NULL)
116 return EINVAL;
117 s = splnet();
118 error = altq_attach(&ifp->if_snd, ALTQT_PRIQ, a->altq_disc,
119 priq_enqueue, priq_dequeue, priq_request, NULL, NULL);
120 splx(s);
121 return error;
122 }
123
124 int
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), M_DEVBUF, M_WAITOK|M_ZERO);
136 if (pif == NULL)
137 return ENOMEM;
138 pif->pif_bandwidth = a->ifbandwidth;
139 pif->pif_maxpri = -1;
140 pif->pif_ifq = &ifp->if_snd;
141
142 /* keep the state in pf_altq */
143 a->altq_disc = pif;
144
145 return 0;
146 }
147
148 int
priq_remove_altq(struct pf_altq * a)149 priq_remove_altq(struct pf_altq *a)
150 {
151 struct priq_if *pif;
152
153 if ((pif = a->altq_disc) == NULL)
154 return EINVAL;
155 a->altq_disc = NULL;
156
157 (void)priq_clear_interface(pif);
158
159 free(pif, M_DEVBUF);
160 return 0;
161 }
162
163 int
priq_add_queue(struct pf_altq * a)164 priq_add_queue(struct pf_altq *a)
165 {
166 struct priq_if *pif;
167 struct priq_class *cl;
168
169 if ((pif = a->altq_disc) == NULL)
170 return EINVAL;
171
172 /* check parameters */
173 if (a->priority >= PRIQ_MAXPRI)
174 return EINVAL;
175 if (a->qid == 0)
176 return EINVAL;
177 if (pif->pif_classes[a->priority] != NULL)
178 return EBUSY;
179 if (clh_to_clp(pif, a->qid) != NULL)
180 return EBUSY;
181
182 cl = priq_class_create(pif, a->priority, a->qlimit,
183 a->pq_u.priq_opts.flags, a->qid);
184 if (cl == NULL)
185 return ENOMEM;
186
187 return 0;
188 }
189
190 int
priq_remove_queue(struct pf_altq * a)191 priq_remove_queue(struct pf_altq *a)
192 {
193 struct priq_if *pif;
194 struct priq_class *cl;
195
196 if ((pif = a->altq_disc) == NULL)
197 return EINVAL;
198
199 if ((cl = clh_to_clp(pif, a->qid)) == NULL)
200 return EINVAL;
201
202 return priq_class_destroy(cl);
203 }
204
205 int
priq_getqstats(struct pf_altq * a,void * ubuf,int * nbytes)206 priq_getqstats(struct pf_altq *a, void *ubuf, int *nbytes)
207 {
208 struct priq_if *pif;
209 struct priq_class *cl;
210 struct priq_classstats stats;
211 int error = 0;
212
213 if ((pif = altq_lookup(a->ifname, ALTQT_PRIQ)) == NULL)
214 return EBADF;
215
216 if ((cl = clh_to_clp(pif, a->qid)) == NULL)
217 return EINVAL;
218
219 if (*nbytes < sizeof(stats))
220 return EINVAL;
221
222 memset(&stats, 0, sizeof(stats));
223 get_class_stats(&stats, cl);
224
225 if ((error = copyout((void *)&stats, ubuf, sizeof(stats))) != 0)
226 return error;
227 *nbytes = sizeof(stats);
228 return 0;
229 }
230 #endif /* NPF > 0 */
231
232 /*
233 * bring the interface back to the initial state by discarding
234 * all the filters and classes.
235 */
236 static int
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 switch (req) {
261 case ALTRQ_PURGE:
262 priq_purge(pif);
263 break;
264 }
265 return 0;
266 }
267
268 /* discard all the queued packets on the interface */
269 static void
priq_purge(struct priq_if * pif)270 priq_purge(struct priq_if *pif)
271 {
272 struct priq_class *cl;
273 int pri;
274
275 for (pri = 0; pri <= pif->pif_maxpri; pri++) {
276 if ((cl = pif->pif_classes[pri]) != NULL && !qempty(cl->cl_q))
277 priq_purgeq(cl);
278 }
279 if (ALTQ_IS_ENABLED(pif->pif_ifq))
280 pif->pif_ifq->ifq_len = 0;
281 }
282
283 static struct priq_class *
priq_class_create(struct priq_if * pif,int pri,int qlimit,int flags,int qid)284 priq_class_create(struct priq_if *pif, int pri, int qlimit, int flags, int qid)
285 {
286 struct priq_class *cl;
287 int s;
288
289 #ifndef ALTQ_RED
290 if (flags & PRCF_RED) {
291 #ifdef ALTQ_DEBUG
292 printf("priq_class_create: RED not configured for PRIQ!\n");
293 #endif
294 return NULL;
295 }
296 #endif
297
298 if ((cl = pif->pif_classes[pri]) != NULL) {
299 /* modify the class instead of creating a new one */
300 s = splnet();
301 if (!qempty(cl->cl_q))
302 priq_purgeq(cl);
303 splx(s);
304 #ifdef ALTQ_RIO
305 if (q_is_rio(cl->cl_q))
306 rio_destroy((rio_t *)cl->cl_red);
307 #endif
308 #ifdef ALTQ_RED
309 if (q_is_red(cl->cl_q))
310 red_destroy(cl->cl_red);
311 #endif
312 } else {
313 cl = malloc(sizeof(struct priq_class), M_DEVBUF,
314 M_WAITOK|M_ZERO);
315 if (cl == NULL)
316 return NULL;
317
318 cl->cl_q = malloc(sizeof(class_queue_t), M_DEVBUF,
319 M_WAITOK|M_ZERO);
320 if (cl->cl_q == NULL) {
321 free(cl, M_DEVBUF);
322 return NULL;
323 }
324 }
325
326 pif->pif_classes[pri] = cl;
327 if (flags & PRCF_DEFAULTCLASS)
328 pif->pif_default = cl;
329 if (qlimit == 0)
330 qlimit = 50; /* use default */
331 qlimit(cl->cl_q) = qlimit;
332 qtype(cl->cl_q) = Q_DROPTAIL;
333 qlen(cl->cl_q) = 0;
334 cl->cl_flags = flags;
335 cl->cl_pri = pri;
336 if (pri > pif->pif_maxpri)
337 pif->pif_maxpri = pri;
338 cl->cl_pif = pif;
339 cl->cl_handle = qid;
340
341 #ifdef ALTQ_RED
342 if (flags & (PRCF_RED|PRCF_RIO)) {
343 int red_flags, red_pkttime;
344
345 red_flags = 0;
346 if (flags & PRCF_ECN)
347 red_flags |= REDF_ECN;
348 #ifdef ALTQ_RIO
349 if (flags & PRCF_CLEARDSCP)
350 red_flags |= RIOF_CLEARDSCP;
351 #endif
352 if (pif->pif_bandwidth < 8)
353 red_pkttime = 1000 * 1000 * 1000; /* 1 sec */
354 else
355 red_pkttime = (int64_t)pif->pif_ifq->altq_ifp->if_mtu
356 * 1000 * 1000 * 1000 / (pif->pif_bandwidth / 8);
357 #ifdef ALTQ_RIO
358 if (flags & PRCF_RIO) {
359 cl->cl_red = (red_t *)rio_alloc(0, NULL,
360 red_flags, red_pkttime);
361 if (cl->cl_red != NULL)
362 qtype(cl->cl_q) = Q_RIO;
363 } else
364 #endif
365 if (flags & PRCF_RED) {
366 cl->cl_red = red_alloc(0, 0,
367 qlimit(cl->cl_q) * 10/100,
368 qlimit(cl->cl_q) * 30/100,
369 red_flags, red_pkttime);
370 if (cl->cl_red != NULL)
371 qtype(cl->cl_q) = Q_RED;
372 }
373 }
374 #endif /* ALTQ_RED */
375
376 return cl;
377 }
378
379 static int
priq_class_destroy(struct priq_class * cl)380 priq_class_destroy(struct priq_class *cl)
381 {
382 struct priq_if *pif;
383 int s, pri;
384
385 s = splnet();
386
387 #ifdef ALTQ3_CLFIER_COMPAT
388 /* delete filters referencing to this class */
389 acc_discard_filters(&cl->cl_pif->pif_classifier, cl, 0);
390 #endif
391
392 if (!qempty(cl->cl_q))
393 priq_purgeq(cl);
394
395 pif = cl->cl_pif;
396 pif->pif_classes[cl->cl_pri] = NULL;
397 if (pif->pif_maxpri == cl->cl_pri) {
398 for (pri = cl->cl_pri; pri >= 0; pri--)
399 if (pif->pif_classes[pri] != NULL) {
400 pif->pif_maxpri = pri;
401 break;
402 }
403 if (pri < 0)
404 pif->pif_maxpri = -1;
405 }
406 splx(s);
407
408 if (cl->cl_red != NULL) {
409 #ifdef ALTQ_RIO
410 if (q_is_rio(cl->cl_q))
411 rio_destroy((rio_t *)cl->cl_red);
412 #endif
413 #ifdef ALTQ_RED
414 if (q_is_red(cl->cl_q))
415 red_destroy(cl->cl_red);
416 #endif
417 }
418 free(cl->cl_q, M_DEVBUF);
419 free(cl, M_DEVBUF);
420 return 0;
421 }
422
423 /*
424 * priq_enqueue is an enqueue function to be registered to
425 * (*altq_enqueue) in struct ifaltq.
426 */
427 static int
priq_enqueue(struct ifaltq * ifq,struct mbuf * m)428 priq_enqueue(struct ifaltq *ifq, struct mbuf *m)
429 {
430 struct altq_pktattr pktattr;
431 struct priq_if *pif = (struct priq_if *)ifq->altq_disc;
432 struct priq_class *cl;
433 struct m_tag *t;
434 int len;
435
436 /* grab class set by classifier */
437 if ((m->m_flags & M_PKTHDR) == 0) {
438 /* should not happen */
439 printf("altq: packet for %s does not have pkthdr\n",
440 ifq->altq_ifp->if_xname);
441 m_freem(m);
442 return ENOBUFS;
443 }
444 cl = NULL;
445 if ((t = m_tag_find(m, PACKET_TAG_ALTQ_QID)) != NULL)
446 cl = clh_to_clp(pif, ((struct altq_tag *)(t+1))->qid);
447 #ifdef ALTQ3_COMPAT
448 else if (ifq->altq_flags & ALTQF_CLASSIFY)
449 cl = m->m_pkthdr.pattr_class;
450 #endif
451 if (cl == NULL) {
452 cl = pif->pif_default;
453 if (cl == NULL) {
454 m_freem(m);
455 return ENOBUFS;
456 }
457 }
458 #ifdef ALTQ3_COMPAT
459 if (m->m_pkthdr.pattr_af != AF_UNSPEC) {
460 pktattr.pattr_class = m->m_pkthdr.pattr_class;
461 pktattr.pattr_af = m->m_pkthdr.pattr_af;
462 pktattr.pattr_hdr = m->m_pkthdr.pattr_hdr;
463
464 cl->cl_pktattr = &pktattr; /* save proto hdr used by ECN */
465 } else
466 #endif
467 cl->cl_pktattr = NULL;
468 len = m_pktlen(m);
469 if (priq_addq(cl, m) != 0) {
470 /* drop occurred. mbuf was freed in priq_addq. */
471 PKTCNTR_ADD(&cl->cl_dropcnt, len);
472 return ENOBUFS;
473 }
474 IFQ_INC_LEN(ifq);
475
476 /* successfully queued. */
477 return 0;
478 }
479
480 /*
481 * priq_dequeue is a dequeue function to be registered to
482 * (*altq_dequeue) in struct ifaltq.
483 *
484 * note: ALTDQ_POLL returns the next packet without removing the packet
485 * from the queue. ALTDQ_REMOVE is a normal dequeue operation.
486 * ALTDQ_REMOVE must return the same packet if called immediately
487 * after ALTDQ_POLL.
488 */
489 static struct mbuf *
priq_dequeue(struct ifaltq * ifq,int op)490 priq_dequeue(struct ifaltq *ifq, int op)
491 {
492 struct priq_if *pif = (struct priq_if *)ifq->altq_disc;
493 struct priq_class *cl;
494 struct mbuf *m;
495 int pri;
496
497 if (IFQ_IS_EMPTY(ifq))
498 /* no packet in the queue */
499 return NULL;
500
501 for (pri = pif->pif_maxpri; pri >= 0; pri--) {
502 if ((cl = pif->pif_classes[pri]) != NULL &&
503 !qempty(cl->cl_q)) {
504 if (op == ALTDQ_POLL)
505 return priq_pollq(cl);
506
507 m = priq_getq(cl);
508 if (m != NULL) {
509 IFQ_DEC_LEN(ifq);
510 if (qempty(cl->cl_q))
511 cl->cl_period++;
512 PKTCNTR_ADD(&cl->cl_xmitcnt, m_pktlen(m));
513 }
514 return m;
515 }
516 }
517 return NULL;
518 }
519
520 static int
priq_addq(struct priq_class * cl,struct mbuf * m)521 priq_addq(struct priq_class *cl, struct mbuf *m)
522 {
523
524 #ifdef ALTQ_RIO
525 if (q_is_rio(cl->cl_q))
526 return rio_addq((rio_t *)cl->cl_red, cl->cl_q, m,
527 cl->cl_pktattr);
528 #endif
529 #ifdef ALTQ_RED
530 if (q_is_red(cl->cl_q))
531 return red_addq(cl->cl_red, cl->cl_q, m, cl->cl_pktattr);
532 #endif
533 if (qlen(cl->cl_q) >= qlimit(cl->cl_q)) {
534 m_freem(m);
535 return -1;
536 }
537
538 if (cl->cl_flags & PRCF_CLEARDSCP)
539 write_dsfield(m, cl->cl_pktattr, 0);
540
541 _addq(cl->cl_q, m);
542
543 return 0;
544 }
545
546 static struct mbuf *
priq_getq(struct priq_class * cl)547 priq_getq(struct priq_class *cl)
548 {
549 #ifdef ALTQ_RIO
550 if (q_is_rio(cl->cl_q))
551 return rio_getq((rio_t *)cl->cl_red, cl->cl_q);
552 #endif
553 #ifdef ALTQ_RED
554 if (q_is_red(cl->cl_q))
555 return red_getq(cl->cl_red, cl->cl_q);
556 #endif
557 return _getq(cl->cl_q);
558 }
559
560 static struct mbuf *
priq_pollq(struct priq_class * cl)561 priq_pollq(struct priq_class *cl)
562 {
563 return qhead(cl->cl_q);
564 }
565
566 static void
priq_purgeq(struct priq_class * cl)567 priq_purgeq(struct priq_class *cl)
568 {
569 struct mbuf *m;
570
571 if (qempty(cl->cl_q))
572 return;
573
574 while ((m = _getq(cl->cl_q)) != NULL) {
575 PKTCNTR_ADD(&cl->cl_dropcnt, m_pktlen(m));
576 m_freem(m);
577 }
578 ASSERT(qlen(cl->cl_q) == 0);
579 }
580
581 static void
get_class_stats(struct priq_classstats * sp,struct priq_class * cl)582 get_class_stats(struct priq_classstats *sp, struct priq_class *cl)
583 {
584 sp->class_handle = cl->cl_handle;
585 sp->qlength = qlen(cl->cl_q);
586 sp->qlimit = qlimit(cl->cl_q);
587 sp->period = cl->cl_period;
588 sp->xmitcnt = cl->cl_xmitcnt;
589 sp->dropcnt = cl->cl_dropcnt;
590
591 sp->qtype = qtype(cl->cl_q);
592 #ifdef ALTQ_RED
593 if (q_is_red(cl->cl_q))
594 red_getstats(cl->cl_red, &sp->red[0]);
595 #endif
596 #ifdef ALTQ_RIO
597 if (q_is_rio(cl->cl_q))
598 rio_getstats((rio_t *)cl->cl_red, &sp->red[0]);
599 #endif
600
601 }
602
603 /* convert a class handle to the corresponding class pointer */
604 static struct priq_class *
clh_to_clp(struct priq_if * pif,u_int32_t chandle)605 clh_to_clp(struct priq_if *pif, u_int32_t chandle)
606 {
607 struct priq_class *cl;
608 int idx;
609
610 if (chandle == 0)
611 return NULL;
612
613 for (idx = pif->pif_maxpri; idx >= 0; idx--)
614 if ((cl = pif->pif_classes[idx]) != NULL &&
615 cl->cl_handle == chandle)
616 return cl;
617
618 return NULL;
619 }
620
621
622 #ifdef ALTQ3_COMPAT
623
624 static struct priq_if *
priq_attach(struct ifaltq * ifq,u_int bandwidth)625 priq_attach(struct ifaltq *ifq, u_int bandwidth)
626 {
627 struct priq_if *pif;
628
629 pif = malloc(sizeof(struct priq_if), M_DEVBUF, M_WAITOK|M_ZERO);
630 if (pif == NULL)
631 return NULL;
632 pif->pif_bandwidth = bandwidth;
633 pif->pif_maxpri = -1;
634 pif->pif_ifq = ifq;
635
636 /* add this state to the priq list */
637 pif->pif_next = pif_list;
638 pif_list = pif;
639
640 return pif;
641 }
642
643 static void
priq_detach(struct priq_if * pif)644 priq_detach(struct priq_if *pif)
645 {
646 (void)priq_clear_interface(pif);
647
648 /* remove this interface from the pif list */
649 if (pif_list == pif)
650 pif_list = pif->pif_next;
651 else {
652 struct priq_if *p;
653
654 for (p = pif_list; p != NULL; p = p->pif_next)
655 if (p->pif_next == pif) {
656 p->pif_next = pif->pif_next;
657 break;
658 }
659 ASSERT(p != NULL);
660 }
661
662 free(pif, M_DEVBUF);
663 }
664
665 /*
666 * priq device interface
667 */
668 int
priqopen(dev_t dev,int flag,int fmt,struct lwp * l)669 priqopen(dev_t dev, int flag, int fmt,
670 struct lwp *l)
671 {
672 /* everything will be done when the queueing scheme is attached. */
673 return 0;
674 }
675
676 int
priqclose(dev_t dev,int flag,int fmt,struct lwp * l)677 priqclose(dev_t dev, int flag, int fmt,
678 struct lwp *l)
679 {
680 struct priq_if *pif;
681
682 while ((pif = pif_list) != NULL) {
683 /* destroy all */
684 if (ALTQ_IS_ENABLED(pif->pif_ifq))
685 altq_disable(pif->pif_ifq);
686
687 int error = altq_detach(pif->pif_ifq);
688 switch (error) {
689 case 0:
690 case ENXIO: /* already disabled */
691 break;
692 default:
693 return error;
694 }
695 priq_detach(pif);
696 }
697
698 return 0;
699 }
700
701 int
priqioctl(dev_t dev,ioctlcmd_t cmd,void * addr,int flag,struct lwp * l)702 priqioctl(dev_t dev, ioctlcmd_t cmd, void *addr, int flag,
703 struct lwp *l)
704 {
705 struct priq_if *pif;
706 struct priq_interface *ifacep;
707 int error = 0;
708
709 /* check super-user privilege */
710 switch (cmd) {
711 case PRIQ_GETSTATS:
712 break;
713 default:
714 if ((error = kauth_authorize_network(l->l_cred,
715 KAUTH_NETWORK_ALTQ, KAUTH_REQ_NETWORK_ALTQ_PRIQ, NULL,
716 NULL, NULL)) != 0)
717 return (error);
718 break;
719 }
720
721 switch (cmd) {
722
723 case PRIQ_IF_ATTACH:
724 error = priqcmd_if_attach((struct priq_interface *)addr);
725 break;
726
727 case PRIQ_IF_DETACH:
728 error = priqcmd_if_detach((struct priq_interface *)addr);
729 break;
730
731 case PRIQ_ENABLE:
732 case PRIQ_DISABLE:
733 case PRIQ_CLEAR:
734 ifacep = (struct priq_interface *)addr;
735 if ((pif = altq_lookup(ifacep->ifname,
736 ALTQT_PRIQ)) == NULL) {
737 error = EBADF;
738 break;
739 }
740
741 switch (cmd) {
742 case PRIQ_ENABLE:
743 if (pif->pif_default == NULL) {
744 #ifdef ALTQ_DEBUG
745 printf("priq: no default class\n");
746 #endif
747 error = EINVAL;
748 break;
749 }
750 error = altq_enable(pif->pif_ifq);
751 break;
752
753 case PRIQ_DISABLE:
754 error = altq_disable(pif->pif_ifq);
755 break;
756
757 case PRIQ_CLEAR:
758 priq_clear_interface(pif);
759 break;
760 }
761 break;
762
763 case PRIQ_ADD_CLASS:
764 error = priqcmd_add_class((struct priq_add_class *)addr);
765 break;
766
767 case PRIQ_DEL_CLASS:
768 error = priqcmd_delete_class((struct priq_delete_class *)addr);
769 break;
770
771 case PRIQ_MOD_CLASS:
772 error = priqcmd_modify_class((struct priq_modify_class *)addr);
773 break;
774
775 case PRIQ_ADD_FILTER:
776 error = priqcmd_add_filter((struct priq_add_filter *)addr);
777 break;
778
779 case PRIQ_DEL_FILTER:
780 error = priqcmd_delete_filter((struct priq_delete_filter *)addr);
781 break;
782
783 case PRIQ_GETSTATS:
784 error = priqcmd_class_stats((struct priq_class_stats *)addr);
785 break;
786
787 default:
788 error = EINVAL;
789 break;
790 }
791 return error;
792 }
793
794 static int
priqcmd_if_attach(struct priq_interface * ap)795 priqcmd_if_attach(struct priq_interface *ap)
796 {
797 struct priq_if *pif;
798 struct ifnet *ifp;
799 int error;
800
801 if ((ifp = ifunit(ap->ifname)) == NULL)
802 return ENXIO;
803
804 if ((pif = priq_attach(&ifp->if_snd, ap->arg)) == NULL)
805 return ENOMEM;
806
807 /*
808 * set PRIQ to this ifnet structure.
809 */
810 if ((error = altq_attach(&ifp->if_snd, ALTQT_PRIQ, pif,
811 priq_enqueue, priq_dequeue, priq_request,
812 &pif->pif_classifier, acc_classify)) != 0)
813 priq_detach(pif);
814
815 return error;
816 }
817
818 static int
priqcmd_if_detach(struct priq_interface * ap)819 priqcmd_if_detach(struct priq_interface *ap)
820 {
821 struct priq_if *pif;
822 int error;
823
824 if ((pif = altq_lookup(ap->ifname, ALTQT_PRIQ)) == NULL)
825 return EBADF;
826
827 if (ALTQ_IS_ENABLED(pif->pif_ifq))
828 altq_disable(pif->pif_ifq);
829
830 if ((error = altq_detach(pif->pif_ifq)))
831 return error;
832
833 priq_detach(pif);
834 return 0;
835 }
836
837 static int
priqcmd_add_class(struct priq_add_class * ap)838 priqcmd_add_class(struct priq_add_class *ap)
839 {
840 struct priq_if *pif;
841 struct priq_class *cl;
842 int qid;
843
844 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL)
845 return EBADF;
846
847 if (ap->pri < 0 || ap->pri >= PRIQ_MAXPRI)
848 return EINVAL;
849 if (pif->pif_classes[ap->pri] != NULL)
850 return EBUSY;
851
852 qid = ap->pri + 1;
853 if ((cl = priq_class_create(pif, ap->pri,
854 ap->qlimit, ap->flags, qid)) == NULL)
855 return ENOMEM;
856
857 /* return a class handle to the user */
858 ap->class_handle = cl->cl_handle;
859
860 return 0;
861 }
862
863 static int
priqcmd_delete_class(struct priq_delete_class * ap)864 priqcmd_delete_class(struct priq_delete_class *ap)
865 {
866 struct priq_if *pif;
867 struct priq_class *cl;
868
869 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL)
870 return EBADF;
871
872 if ((cl = clh_to_clp(pif, ap->class_handle)) == NULL)
873 return EINVAL;
874
875 return priq_class_destroy(cl);
876 }
877
878 static int
priqcmd_modify_class(struct priq_modify_class * ap)879 priqcmd_modify_class(struct priq_modify_class *ap)
880 {
881 struct priq_if *pif;
882 struct priq_class *cl;
883
884 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL)
885 return EBADF;
886
887 if (ap->pri < 0 || ap->pri >= PRIQ_MAXPRI)
888 return EINVAL;
889
890 if ((cl = clh_to_clp(pif, ap->class_handle)) == NULL)
891 return EINVAL;
892
893 /*
894 * if priority is changed, move the class to the new priority
895 */
896 if (pif->pif_classes[ap->pri] != cl) {
897 if (pif->pif_classes[ap->pri] != NULL)
898 return EEXIST;
899 pif->pif_classes[cl->cl_pri] = NULL;
900 pif->pif_classes[ap->pri] = cl;
901 cl->cl_pri = ap->pri;
902 }
903
904 /* call priq_class_create to change class parameters */
905 if ((cl = priq_class_create(pif, ap->pri,
906 ap->qlimit, ap->flags, ap->class_handle)) == NULL)
907 return ENOMEM;
908 return 0;
909 }
910
911 static int
priqcmd_add_filter(struct priq_add_filter * ap)912 priqcmd_add_filter(struct priq_add_filter *ap)
913 {
914 struct priq_if *pif;
915 struct priq_class *cl;
916
917 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL)
918 return EBADF;
919
920 if ((cl = clh_to_clp(pif, ap->class_handle)) == NULL)
921 return EINVAL;
922
923 return acc_add_filter(&pif->pif_classifier, &ap->filter,
924 cl, &ap->filter_handle);
925 }
926
927 static int
priqcmd_delete_filter(struct priq_delete_filter * ap)928 priqcmd_delete_filter(struct priq_delete_filter *ap)
929 {
930 struct priq_if *pif;
931
932 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL)
933 return EBADF;
934
935 return acc_delete_filter(&pif->pif_classifier,
936 ap->filter_handle);
937 }
938
939 static int
priqcmd_class_stats(struct priq_class_stats * ap)940 priqcmd_class_stats(struct priq_class_stats *ap)
941 {
942 struct priq_if *pif;
943 struct priq_class *cl;
944 struct priq_classstats stats, *usp;
945 int pri, error;
946
947 if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL)
948 return EBADF;
949
950 ap->maxpri = pif->pif_maxpri;
951
952 /* then, read the next N classes in the tree */
953 usp = ap->stats;
954 for (pri = 0; pri <= pif->pif_maxpri; pri++) {
955 cl = pif->pif_classes[pri];
956 memset(&stats, 0, sizeof(stats));
957 if (cl != NULL)
958 get_class_stats(&stats, cl);
959 if ((error = copyout((void *)&stats, (void *)usp++,
960 sizeof(stats))) != 0)
961 return error;
962 }
963 return 0;
964 }
965
966 #ifdef KLD_MODULE
967
968 static struct altqsw priq_sw =
969 {"priq", priqopen, priqclose, priqioctl};
970
971 ALTQ_MODULE(altq_priq, ALTQT_PRIQ, &priq_sw);
972 MODULE_DEPEND(altq_priq, altq_red, 1, 1, 1);
973 MODULE_DEPEND(altq_priq, altq_rio, 1, 1, 1);
974
975 #endif /* KLD_MODULE */
976
977 #endif /* ALTQ3_COMPAT */
978 #endif /* ALTQ_PRIQ */
979