1/*	$FreeBSD$	*/
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
67static struct priq_if *priq_attach(struct ifaltq *, u_int);
68static int priq_detach(struct priq_if *);
69#endif
70static int priq_clear_interface(struct priq_if *);
71static int priq_request(struct ifaltq *, int, void *);
72static void priq_purge(struct priq_if *);
73static struct priq_class *priq_class_create(struct priq_if *, int, int, int,
74    int);
75static int priq_class_destroy(struct priq_class *);
76static int priq_enqueue(struct ifaltq *, struct mbuf *, struct altq_pktattr *);
77static struct mbuf *priq_dequeue(struct ifaltq *, int);
78
79static int priq_addq(struct priq_class *, struct mbuf *);
80static struct mbuf *priq_getq(struct priq_class *);
81static struct mbuf *priq_pollq(struct priq_class *);
82static void priq_purgeq(struct priq_class *);
83
84#ifdef ALTQ3_COMPAT
85static int priqcmd_if_attach(struct priq_interface *);
86static int priqcmd_if_detach(struct priq_interface *);
87static int priqcmd_add_class(struct priq_add_class *);
88static int priqcmd_delete_class(struct priq_delete_class *);
89static int priqcmd_modify_class(struct priq_modify_class *);
90static int priqcmd_add_filter(struct priq_add_filter *);
91static int priqcmd_delete_filter(struct priq_delete_filter *);
92static int priqcmd_class_stats(struct priq_class_stats *);
93#endif /* ALTQ3_COMPAT */
94
95static void get_class_stats(struct priq_classstats *, struct priq_class *);
96static struct priq_class *clh_to_clp(struct priq_if *, u_int32_t);
97
98#ifdef ALTQ3_COMPAT
99altqdev_decl(priq);
100
101/* pif_list keeps all priq_if's allocated. */
102static struct priq_if *pif_list = NULL;
103#endif /* ALTQ3_COMPAT */
104
105int
106priq_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
124int
125priq_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_NOWAIT | 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
148int
149priq_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
163int
164priq_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
190int
191priq_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
205int
206priq_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	get_class_stats(&stats, cl);
223
224	if ((error = copyout((caddr_t)&stats, ubuf, sizeof(stats))) != 0)
225		return (error);
226	*nbytes = sizeof(stats);
227	return (0);
228}
229
230/*
231 * bring the interface back to the initial state by discarding
232 * all the filters and classes.
233 */
234static int
235priq_clear_interface(struct priq_if *pif)
236{
237	struct priq_class	*cl;
238	int pri;
239
240#ifdef ALTQ3_CLFIER_COMPAT
241	/* free the filters for this interface */
242	acc_discard_filters(&pif->pif_classifier, NULL, 1);
243#endif
244
245	/* clear out the classes */
246	for (pri = 0; pri <= pif->pif_maxpri; pri++)
247		if ((cl = pif->pif_classes[pri]) != NULL)
248			priq_class_destroy(cl);
249
250	return (0);
251}
252
253static int
254priq_request(struct ifaltq *ifq, int req, void *arg)
255{
256	struct priq_if	*pif = (struct priq_if *)ifq->altq_disc;
257
258	IFQ_LOCK_ASSERT(ifq);
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 */
269static void
270priq_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
283static struct priq_class *
284priq_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#ifdef __NetBSD__
301		s = splnet();
302#else
303		s = splimp();
304#endif
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	} else {
319		cl = malloc(sizeof(struct priq_class), M_DEVBUF,
320		    M_NOWAIT | M_ZERO);
321		if (cl == NULL)
322			return (NULL);
323
324		cl->cl_q = malloc(sizeof(class_queue_t), M_DEVBUF,
325		    M_NOWAIT | M_ZERO);
326		if (cl->cl_q == NULL)
327			goto err_ret;
328	}
329
330	pif->pif_classes[pri] = cl;
331	if (flags & PRCF_DEFAULTCLASS)
332		pif->pif_default = cl;
333	if (qlimit == 0)
334		qlimit = 50;  /* use default */
335	qlimit(cl->cl_q) = qlimit;
336	qtype(cl->cl_q) = Q_DROPTAIL;
337	qlen(cl->cl_q) = 0;
338	cl->cl_flags = flags;
339	cl->cl_pri = pri;
340	if (pri > pif->pif_maxpri)
341		pif->pif_maxpri = pri;
342	cl->cl_pif = pif;
343	cl->cl_handle = qid;
344
345#ifdef ALTQ_RED
346	if (flags & (PRCF_RED|PRCF_RIO)) {
347		int red_flags, red_pkttime;
348
349		red_flags = 0;
350		if (flags & PRCF_ECN)
351			red_flags |= REDF_ECN;
352#ifdef ALTQ_RIO
353		if (flags & PRCF_CLEARDSCP)
354			red_flags |= RIOF_CLEARDSCP;
355#endif
356		if (pif->pif_bandwidth < 8)
357			red_pkttime = 1000 * 1000 * 1000; /* 1 sec */
358		else
359			red_pkttime = (int64_t)pif->pif_ifq->altq_ifp->if_mtu
360			  * 1000 * 1000 * 1000 / (pif->pif_bandwidth / 8);
361#ifdef ALTQ_RIO
362		if (flags & PRCF_RIO) {
363			cl->cl_red = (red_t *)rio_alloc(0, NULL,
364						red_flags, red_pkttime);
365			if (cl->cl_red == NULL)
366				goto err_ret;
367			qtype(cl->cl_q) = Q_RIO;
368		} else
369#endif
370		if (flags & PRCF_RED) {
371			cl->cl_red = red_alloc(0, 0,
372			    qlimit(cl->cl_q) * 10/100,
373			    qlimit(cl->cl_q) * 30/100,
374			    red_flags, red_pkttime);
375			if (cl->cl_red == NULL)
376				goto err_ret;
377			qtype(cl->cl_q) = Q_RED;
378		}
379	}
380#endif /* ALTQ_RED */
381
382	return (cl);
383
384 err_ret:
385	if (cl->cl_red != NULL) {
386#ifdef ALTQ_RIO
387		if (q_is_rio(cl->cl_q))
388			rio_destroy((rio_t *)cl->cl_red);
389#endif
390#ifdef ALTQ_RED
391		if (q_is_red(cl->cl_q))
392			red_destroy(cl->cl_red);
393#endif
394	}
395	if (cl->cl_q != NULL)
396		free(cl->cl_q, M_DEVBUF);
397	free(cl, M_DEVBUF);
398	return (NULL);
399}
400
401static int
402priq_class_destroy(struct priq_class *cl)
403{
404	struct priq_if *pif;
405	int s, pri;
406
407#ifdef __NetBSD__
408	s = splnet();
409#else
410	s = splimp();
411#endif
412	IFQ_LOCK(cl->cl_pif->pif_ifq);
413
414#ifdef ALTQ3_CLFIER_COMPAT
415	/* delete filters referencing to this class */
416	acc_discard_filters(&cl->cl_pif->pif_classifier, cl, 0);
417#endif
418
419	if (!qempty(cl->cl_q))
420		priq_purgeq(cl);
421
422	pif = cl->cl_pif;
423	pif->pif_classes[cl->cl_pri] = NULL;
424	if (pif->pif_maxpri == cl->cl_pri) {
425		for (pri = cl->cl_pri; pri >= 0; pri--)
426			if (pif->pif_classes[pri] != NULL) {
427				pif->pif_maxpri = pri;
428				break;
429			}
430		if (pri < 0)
431			pif->pif_maxpri = -1;
432	}
433	IFQ_UNLOCK(cl->cl_pif->pif_ifq);
434	splx(s);
435
436	if (cl->cl_red != NULL) {
437#ifdef ALTQ_RIO
438		if (q_is_rio(cl->cl_q))
439			rio_destroy((rio_t *)cl->cl_red);
440#endif
441#ifdef ALTQ_RED
442		if (q_is_red(cl->cl_q))
443			red_destroy(cl->cl_red);
444#endif
445	}
446	free(cl->cl_q, M_DEVBUF);
447	free(cl, M_DEVBUF);
448	return (0);
449}
450
451/*
452 * priq_enqueue is an enqueue function to be registered to
453 * (*altq_enqueue) in struct ifaltq.
454 */
455static int
456priq_enqueue(struct ifaltq *ifq, struct mbuf *m, struct altq_pktattr *pktattr)
457{
458	struct priq_if	*pif = (struct priq_if *)ifq->altq_disc;
459	struct priq_class *cl;
460	struct pf_mtag *t;
461	int len;
462
463	IFQ_LOCK_ASSERT(ifq);
464
465	/* grab class set by classifier */
466	if ((m->m_flags & M_PKTHDR) == 0) {
467		/* should not happen */
468		printf("altq: packet for %s does not have pkthdr\n",
469		    ifq->altq_ifp->if_xname);
470		m_freem(m);
471		return (ENOBUFS);
472	}
473	cl = NULL;
474	if ((t = pf_find_mtag(m)) != NULL)
475		cl = clh_to_clp(pif, t->qid);
476#ifdef ALTQ3_COMPAT
477	else if ((ifq->altq_flags & ALTQF_CLASSIFY) && pktattr != NULL)
478		cl = pktattr->pattr_class;
479#endif
480	if (cl == NULL) {
481		cl = pif->pif_default;
482		if (cl == NULL) {
483			m_freem(m);
484			return (ENOBUFS);
485		}
486	}
487#ifdef ALTQ3_COMPAT
488	if (pktattr != NULL)
489		cl->cl_pktattr = pktattr;  /* save proto hdr used by ECN */
490	else
491#endif
492		cl->cl_pktattr = NULL;
493	len = m_pktlen(m);
494	if (priq_addq(cl, m) != 0) {
495		/* drop occurred.  mbuf was freed in priq_addq. */
496		PKTCNTR_ADD(&cl->cl_dropcnt, len);
497		return (ENOBUFS);
498	}
499	IFQ_INC_LEN(ifq);
500
501	/* successfully queued. */
502	return (0);
503}
504
505/*
506 * priq_dequeue is a dequeue function to be registered to
507 * (*altq_dequeue) in struct ifaltq.
508 *
509 * note: ALTDQ_POLL returns the next packet without removing the packet
510 *	from the queue.  ALTDQ_REMOVE is a normal dequeue operation.
511 *	ALTDQ_REMOVE must return the same packet if called immediately
512 *	after ALTDQ_POLL.
513 */
514static struct mbuf *
515priq_dequeue(struct ifaltq *ifq, int op)
516{
517	struct priq_if	*pif = (struct priq_if *)ifq->altq_disc;
518	struct priq_class *cl;
519	struct mbuf *m;
520	int pri;
521
522	IFQ_LOCK_ASSERT(ifq);
523
524	if (IFQ_IS_EMPTY(ifq))
525		/* no packet in the queue */
526		return (NULL);
527
528	for (pri = pif->pif_maxpri;  pri >= 0; pri--) {
529		if ((cl = pif->pif_classes[pri]) != NULL &&
530		    !qempty(cl->cl_q)) {
531			if (op == ALTDQ_POLL)
532				return (priq_pollq(cl));
533
534			m = priq_getq(cl);
535			if (m != NULL) {
536				IFQ_DEC_LEN(ifq);
537				if (qempty(cl->cl_q))
538					cl->cl_period++;
539				PKTCNTR_ADD(&cl->cl_xmitcnt, m_pktlen(m));
540			}
541			return (m);
542		}
543	}
544	return (NULL);
545}
546
547static int
548priq_addq(struct priq_class *cl, struct mbuf *m)
549{
550
551#ifdef ALTQ_RIO
552	if (q_is_rio(cl->cl_q))
553		return rio_addq((rio_t *)cl->cl_red, cl->cl_q, m,
554				cl->cl_pktattr);
555#endif
556#ifdef ALTQ_RED
557	if (q_is_red(cl->cl_q))
558		return red_addq(cl->cl_red, cl->cl_q, m, cl->cl_pktattr);
559#endif
560	if (qlen(cl->cl_q) >= qlimit(cl->cl_q)) {
561		m_freem(m);
562		return (-1);
563	}
564
565	if (cl->cl_flags & PRCF_CLEARDSCP)
566		write_dsfield(m, cl->cl_pktattr, 0);
567
568	_addq(cl->cl_q, m);
569
570	return (0);
571}
572
573static struct mbuf *
574priq_getq(struct priq_class *cl)
575{
576#ifdef ALTQ_RIO
577	if (q_is_rio(cl->cl_q))
578		return rio_getq((rio_t *)cl->cl_red, cl->cl_q);
579#endif
580#ifdef ALTQ_RED
581	if (q_is_red(cl->cl_q))
582		return red_getq(cl->cl_red, cl->cl_q);
583#endif
584	return _getq(cl->cl_q);
585}
586
587static struct mbuf *
588priq_pollq(cl)
589	struct priq_class *cl;
590{
591	return qhead(cl->cl_q);
592}
593
594static void
595priq_purgeq(struct priq_class *cl)
596{
597	struct mbuf *m;
598
599	if (qempty(cl->cl_q))
600		return;
601
602	while ((m = _getq(cl->cl_q)) != NULL) {
603		PKTCNTR_ADD(&cl->cl_dropcnt, m_pktlen(m));
604		m_freem(m);
605	}
606	ASSERT(qlen(cl->cl_q) == 0);
607}
608
609static void
610get_class_stats(struct priq_classstats *sp, struct priq_class *cl)
611{
612	sp->class_handle = cl->cl_handle;
613	sp->qlength = qlen(cl->cl_q);
614	sp->qlimit = qlimit(cl->cl_q);
615	sp->period = cl->cl_period;
616	sp->xmitcnt = cl->cl_xmitcnt;
617	sp->dropcnt = cl->cl_dropcnt;
618
619	sp->qtype = qtype(cl->cl_q);
620#ifdef ALTQ_RED
621	if (q_is_red(cl->cl_q))
622		red_getstats(cl->cl_red, &sp->red[0]);
623#endif
624#ifdef ALTQ_RIO
625	if (q_is_rio(cl->cl_q))
626		rio_getstats((rio_t *)cl->cl_red, &sp->red[0]);
627#endif
628
629}
630
631/* convert a class handle to the corresponding class pointer */
632static struct priq_class *
633clh_to_clp(struct priq_if *pif, u_int32_t chandle)
634{
635	struct priq_class *cl;
636	int idx;
637
638	if (chandle == 0)
639		return (NULL);
640
641	for (idx = pif->pif_maxpri; idx >= 0; idx--)
642		if ((cl = pif->pif_classes[idx]) != NULL &&
643		    cl->cl_handle == chandle)
644			return (cl);
645
646	return (NULL);
647}
648
649
650#ifdef ALTQ3_COMPAT
651
652static struct priq_if *
653priq_attach(ifq, bandwidth)
654	struct ifaltq *ifq;
655	u_int bandwidth;
656{
657	struct priq_if *pif;
658
659	pif = malloc(sizeof(struct priq_if),
660	       M_DEVBUF, M_WAITOK);
661	if (pif == NULL)
662		return (NULL);
663	bzero(pif, sizeof(struct priq_if));
664	pif->pif_bandwidth = bandwidth;
665	pif->pif_maxpri = -1;
666	pif->pif_ifq = ifq;
667
668	/* add this state to the priq list */
669	pif->pif_next = pif_list;
670	pif_list = pif;
671
672	return (pif);
673}
674
675static int
676priq_detach(pif)
677	struct priq_if *pif;
678{
679	(void)priq_clear_interface(pif);
680
681	/* remove this interface from the pif list */
682	if (pif_list == pif)
683		pif_list = pif->pif_next;
684	else {
685		struct priq_if *p;
686
687		for (p = pif_list; p != NULL; p = p->pif_next)
688			if (p->pif_next == pif) {
689				p->pif_next = pif->pif_next;
690				break;
691			}
692		ASSERT(p != NULL);
693	}
694
695	free(pif, M_DEVBUF);
696	return (0);
697}
698
699/*
700 * priq device interface
701 */
702int
703priqopen(dev, flag, fmt, p)
704	dev_t dev;
705	int flag, fmt;
706#if (__FreeBSD_version > 500000)
707	struct thread *p;
708#else
709	struct proc *p;
710#endif
711{
712	/* everything will be done when the queueing scheme is attached. */
713	return 0;
714}
715
716int
717priqclose(dev, flag, fmt, p)
718	dev_t dev;
719	int flag, fmt;
720#if (__FreeBSD_version > 500000)
721	struct thread *p;
722#else
723	struct proc *p;
724#endif
725{
726	struct priq_if *pif;
727	int err, error = 0;
728
729	while ((pif = pif_list) != NULL) {
730		/* destroy all */
731		if (ALTQ_IS_ENABLED(pif->pif_ifq))
732			altq_disable(pif->pif_ifq);
733
734		err = altq_detach(pif->pif_ifq);
735		if (err == 0)
736			err = priq_detach(pif);
737		if (err != 0 && error == 0)
738			error = err;
739	}
740
741	return error;
742}
743
744int
745priqioctl(dev, cmd, addr, flag, p)
746	dev_t dev;
747	ioctlcmd_t cmd;
748	caddr_t addr;
749	int flag;
750#if (__FreeBSD_version > 500000)
751	struct thread *p;
752#else
753	struct proc *p;
754#endif
755{
756	struct priq_if *pif;
757	struct priq_interface *ifacep;
758	int	error = 0;
759
760	/* check super-user privilege */
761	switch (cmd) {
762	case PRIQ_GETSTATS:
763		break;
764	default:
765#if (__FreeBSD_version > 700000)
766		if ((error = priv_check(p, PRIV_ALTQ_MANAGE)) != 0)
767			return (error);
768#elsif (__FreeBSD_version > 400000)
769		if ((error = suser(p)) != 0)
770			return (error);
771#else
772		if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
773			return (error);
774#endif
775		break;
776	}
777
778	switch (cmd) {
779
780	case PRIQ_IF_ATTACH:
781		error = priqcmd_if_attach((struct priq_interface *)addr);
782		break;
783
784	case PRIQ_IF_DETACH:
785		error = priqcmd_if_detach((struct priq_interface *)addr);
786		break;
787
788	case PRIQ_ENABLE:
789	case PRIQ_DISABLE:
790	case PRIQ_CLEAR:
791		ifacep = (struct priq_interface *)addr;
792		if ((pif = altq_lookup(ifacep->ifname,
793				       ALTQT_PRIQ)) == NULL) {
794			error = EBADF;
795			break;
796		}
797
798		switch (cmd) {
799		case PRIQ_ENABLE:
800			if (pif->pif_default == NULL) {
801#ifdef ALTQ_DEBUG
802				printf("priq: no default class\n");
803#endif
804				error = EINVAL;
805				break;
806			}
807			error = altq_enable(pif->pif_ifq);
808			break;
809
810		case PRIQ_DISABLE:
811			error = altq_disable(pif->pif_ifq);
812			break;
813
814		case PRIQ_CLEAR:
815			priq_clear_interface(pif);
816			break;
817		}
818		break;
819
820	case PRIQ_ADD_CLASS:
821		error = priqcmd_add_class((struct priq_add_class *)addr);
822		break;
823
824	case PRIQ_DEL_CLASS:
825		error = priqcmd_delete_class((struct priq_delete_class *)addr);
826		break;
827
828	case PRIQ_MOD_CLASS:
829		error = priqcmd_modify_class((struct priq_modify_class *)addr);
830		break;
831
832	case PRIQ_ADD_FILTER:
833		error = priqcmd_add_filter((struct priq_add_filter *)addr);
834		break;
835
836	case PRIQ_DEL_FILTER:
837		error = priqcmd_delete_filter((struct priq_delete_filter *)addr);
838		break;
839
840	case PRIQ_GETSTATS:
841		error = priqcmd_class_stats((struct priq_class_stats *)addr);
842		break;
843
844	default:
845		error = EINVAL;
846		break;
847	}
848	return error;
849}
850
851static int
852priqcmd_if_attach(ap)
853	struct priq_interface *ap;
854{
855	struct priq_if *pif;
856	struct ifnet *ifp;
857	int error;
858
859	if ((ifp = ifunit(ap->ifname)) == NULL)
860		return (ENXIO);
861
862	if ((pif = priq_attach(&ifp->if_snd, ap->arg)) == NULL)
863		return (ENOMEM);
864
865	/*
866	 * set PRIQ to this ifnet structure.
867	 */
868	if ((error = altq_attach(&ifp->if_snd, ALTQT_PRIQ, pif,
869				 priq_enqueue, priq_dequeue, priq_request,
870				 &pif->pif_classifier, acc_classify)) != 0)
871		(void)priq_detach(pif);
872
873	return (error);
874}
875
876static int
877priqcmd_if_detach(ap)
878	struct priq_interface *ap;
879{
880	struct priq_if *pif;
881	int error;
882
883	if ((pif = altq_lookup(ap->ifname, ALTQT_PRIQ)) == NULL)
884		return (EBADF);
885
886	if (ALTQ_IS_ENABLED(pif->pif_ifq))
887		altq_disable(pif->pif_ifq);
888
889	if ((error = altq_detach(pif->pif_ifq)))
890		return (error);
891
892	return priq_detach(pif);
893}
894
895static int
896priqcmd_add_class(ap)
897	struct priq_add_class *ap;
898{
899	struct priq_if *pif;
900	struct priq_class *cl;
901	int qid;
902
903	if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL)
904		return (EBADF);
905
906	if (ap->pri < 0 || ap->pri >= PRIQ_MAXPRI)
907		return (EINVAL);
908	if (pif->pif_classes[ap->pri] != NULL)
909		return (EBUSY);
910
911	qid = ap->pri + 1;
912	if ((cl = priq_class_create(pif, ap->pri,
913	    ap->qlimit, ap->flags, qid)) == NULL)
914		return (ENOMEM);
915
916	/* return a class handle to the user */
917	ap->class_handle = cl->cl_handle;
918
919	return (0);
920}
921
922static int
923priqcmd_delete_class(ap)
924	struct priq_delete_class *ap;
925{
926	struct priq_if *pif;
927	struct priq_class *cl;
928
929	if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL)
930		return (EBADF);
931
932	if ((cl = clh_to_clp(pif, ap->class_handle)) == NULL)
933		return (EINVAL);
934
935	return priq_class_destroy(cl);
936}
937
938static int
939priqcmd_modify_class(ap)
940	struct priq_modify_class *ap;
941{
942	struct priq_if *pif;
943	struct priq_class *cl;
944
945	if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL)
946		return (EBADF);
947
948	if (ap->pri < 0 || ap->pri >= PRIQ_MAXPRI)
949		return (EINVAL);
950
951	if ((cl = clh_to_clp(pif, ap->class_handle)) == NULL)
952		return (EINVAL);
953
954	/*
955	 * if priority is changed, move the class to the new priority
956	 */
957	if (pif->pif_classes[ap->pri] != cl) {
958		if (pif->pif_classes[ap->pri] != NULL)
959			return (EEXIST);
960		pif->pif_classes[cl->cl_pri] = NULL;
961		pif->pif_classes[ap->pri] = cl;
962		cl->cl_pri = ap->pri;
963	}
964
965	/* call priq_class_create to change class parameters */
966	if ((cl = priq_class_create(pif, ap->pri,
967	    ap->qlimit, ap->flags, ap->class_handle)) == NULL)
968		return (ENOMEM);
969	return 0;
970}
971
972static int
973priqcmd_add_filter(ap)
974	struct priq_add_filter *ap;
975{
976	struct priq_if *pif;
977	struct priq_class *cl;
978
979	if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL)
980		return (EBADF);
981
982	if ((cl = clh_to_clp(pif, ap->class_handle)) == NULL)
983		return (EINVAL);
984
985	return acc_add_filter(&pif->pif_classifier, &ap->filter,
986			      cl, &ap->filter_handle);
987}
988
989static int
990priqcmd_delete_filter(ap)
991	struct priq_delete_filter *ap;
992{
993	struct priq_if *pif;
994
995	if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL)
996		return (EBADF);
997
998	return acc_delete_filter(&pif->pif_classifier,
999				 ap->filter_handle);
1000}
1001
1002static int
1003priqcmd_class_stats(ap)
1004	struct priq_class_stats *ap;
1005{
1006	struct priq_if *pif;
1007	struct priq_class *cl;
1008	struct priq_classstats stats, *usp;
1009	int	pri, error;
1010
1011	if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL)
1012		return (EBADF);
1013
1014	ap->maxpri = pif->pif_maxpri;
1015
1016	/* then, read the next N classes in the tree */
1017	usp = ap->stats;
1018	for (pri = 0; pri <= pif->pif_maxpri; pri++) {
1019		cl = pif->pif_classes[pri];
1020		if (cl != NULL)
1021			get_class_stats(&stats, cl);
1022		else
1023			bzero(&stats, sizeof(stats));
1024		if ((error = copyout((caddr_t)&stats, (caddr_t)usp++,
1025				     sizeof(stats))) != 0)
1026			return (error);
1027	}
1028	return (0);
1029}
1030
1031#ifdef KLD_MODULE
1032
1033static struct altqsw priq_sw =
1034	{"priq", priqopen, priqclose, priqioctl};
1035
1036ALTQ_MODULE(altq_priq, ALTQT_PRIQ, &priq_sw);
1037MODULE_DEPEND(altq_priq, altq_red, 1, 1, 1);
1038MODULE_DEPEND(altq_priq, altq_rio, 1, 1, 1);
1039
1040#endif /* KLD_MODULE */
1041
1042#endif /* ALTQ3_COMPAT */
1043#endif /* ALTQ_PRIQ */
1044