altq_priq.c revision 263086 
1/*	$FreeBSD: stable/10/sys/contrib/altq/altq/altq_priq.c 263086 2014-03-12 10:45:58Z glebius $	*/
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 <net/if_var.h>
55#include <netinet/in.h>
56
57#include <netpfil/pf/pf.h>
58#include <netpfil/pf/pf_altq.h>
59#include <netpfil/pf/pf_mtag.h>
60#include <altq/altq.h>
61#ifdef ALTQ3_COMPAT
62#include <altq/altq_conf.h>
63#endif
64#include <altq/altq_priq.h>
65
66/*
67 * function prototypes
68 */
69#ifdef ALTQ3_COMPAT
70static struct priq_if *priq_attach(struct ifaltq *, u_int);
71static int priq_detach(struct priq_if *);
72#endif
73static int priq_clear_interface(struct priq_if *);
74static int priq_request(struct ifaltq *, int, void *);
75static void priq_purge(struct priq_if *);
76static struct priq_class *priq_class_create(struct priq_if *, int, int, int,
77    int);
78static int priq_class_destroy(struct priq_class *);
79static int priq_enqueue(struct ifaltq *, struct mbuf *, struct altq_pktattr *);
80static struct mbuf *priq_dequeue(struct ifaltq *, int);
81
82static int priq_addq(struct priq_class *, struct mbuf *);
83static struct mbuf *priq_getq(struct priq_class *);
84static struct mbuf *priq_pollq(struct priq_class *);
85static void priq_purgeq(struct priq_class *);
86
87#ifdef ALTQ3_COMPAT
88static int priqcmd_if_attach(struct priq_interface *);
89static int priqcmd_if_detach(struct priq_interface *);
90static int priqcmd_add_class(struct priq_add_class *);
91static int priqcmd_delete_class(struct priq_delete_class *);
92static int priqcmd_modify_class(struct priq_modify_class *);
93static int priqcmd_add_filter(struct priq_add_filter *);
94static int priqcmd_delete_filter(struct priq_delete_filter *);
95static int priqcmd_class_stats(struct priq_class_stats *);
96#endif /* ALTQ3_COMPAT */
97
98static void get_class_stats(struct priq_classstats *, struct priq_class *);
99static struct priq_class *clh_to_clp(struct priq_if *, u_int32_t);
100
101#ifdef ALTQ3_COMPAT
102altqdev_decl(priq);
103
104/* pif_list keeps all priq_if's allocated. */
105static struct priq_if *pif_list = NULL;
106#endif /* ALTQ3_COMPAT */
107
108int
109priq_pfattach(struct pf_altq *a)
110{
111	struct ifnet *ifp;
112	int s, error;
113
114	if ((ifp = ifunit(a->ifname)) == NULL || a->altq_disc == NULL)
115		return (EINVAL);
116#ifdef __NetBSD__
117	s = splnet();
118#else
119	s = splimp();
120#endif
121	error = altq_attach(&ifp->if_snd, ALTQT_PRIQ, a->altq_disc,
122	    priq_enqueue, priq_dequeue, priq_request, NULL, NULL);
123	splx(s);
124	return (error);
125}
126
127int
128priq_add_altq(struct pf_altq *a)
129{
130	struct priq_if	*pif;
131	struct ifnet	*ifp;
132
133	if ((ifp = ifunit(a->ifname)) == NULL)
134		return (EINVAL);
135	if (!ALTQ_IS_READY(&ifp->if_snd))
136		return (ENODEV);
137
138	pif = malloc(sizeof(struct priq_if), M_DEVBUF, M_NOWAIT | M_ZERO);
139	if (pif == NULL)
140		return (ENOMEM);
141	pif->pif_bandwidth = a->ifbandwidth;
142	pif->pif_maxpri = -1;
143	pif->pif_ifq = &ifp->if_snd;
144
145	/* keep the state in pf_altq */
146	a->altq_disc = pif;
147
148	return (0);
149}
150
151int
152priq_remove_altq(struct pf_altq *a)
153{
154	struct priq_if *pif;
155
156	if ((pif = a->altq_disc) == NULL)
157		return (EINVAL);
158	a->altq_disc = NULL;
159
160	(void)priq_clear_interface(pif);
161
162	free(pif, M_DEVBUF);
163	return (0);
164}
165
166int
167priq_add_queue(struct pf_altq *a)
168{
169	struct priq_if *pif;
170	struct priq_class *cl;
171
172	if ((pif = a->altq_disc) == NULL)
173		return (EINVAL);
174
175	/* check parameters */
176	if (a->priority >= PRIQ_MAXPRI)
177		return (EINVAL);
178	if (a->qid == 0)
179		return (EINVAL);
180	if (pif->pif_classes[a->priority] != NULL)
181		return (EBUSY);
182	if (clh_to_clp(pif, a->qid) != NULL)
183		return (EBUSY);
184
185	cl = priq_class_create(pif, a->priority, a->qlimit,
186	    a->pq_u.priq_opts.flags, a->qid);
187	if (cl == NULL)
188		return (ENOMEM);
189
190	return (0);
191}
192
193int
194priq_remove_queue(struct pf_altq *a)
195{
196	struct priq_if *pif;
197	struct priq_class *cl;
198
199	if ((pif = a->altq_disc) == NULL)
200		return (EINVAL);
201
202	if ((cl = clh_to_clp(pif, a->qid)) == NULL)
203		return (EINVAL);
204
205	return (priq_class_destroy(cl));
206}
207
208int
209priq_getqstats(struct pf_altq *a, void *ubuf, int *nbytes)
210{
211	struct priq_if *pif;
212	struct priq_class *cl;
213	struct priq_classstats stats;
214	int error = 0;
215
216	if ((pif = altq_lookup(a->ifname, ALTQT_PRIQ)) == NULL)
217		return (EBADF);
218
219	if ((cl = clh_to_clp(pif, a->qid)) == NULL)
220		return (EINVAL);
221
222	if (*nbytes < sizeof(stats))
223		return (EINVAL);
224
225	get_class_stats(&stats, cl);
226
227	if ((error = copyout((caddr_t)&stats, ubuf, sizeof(stats))) != 0)
228		return (error);
229	*nbytes = sizeof(stats);
230	return (0);
231}
232
233/*
234 * bring the interface back to the initial state by discarding
235 * all the filters and classes.
236 */
237static int
238priq_clear_interface(struct priq_if *pif)
239{
240	struct priq_class	*cl;
241	int pri;
242
243#ifdef ALTQ3_CLFIER_COMPAT
244	/* free the filters for this interface */
245	acc_discard_filters(&pif->pif_classifier, NULL, 1);
246#endif
247
248	/* clear out the classes */
249	for (pri = 0; pri <= pif->pif_maxpri; pri++)
250		if ((cl = pif->pif_classes[pri]) != NULL)
251			priq_class_destroy(cl);
252
253	return (0);
254}
255
256static int
257priq_request(struct ifaltq *ifq, int req, void *arg)
258{
259	struct priq_if	*pif = (struct priq_if *)ifq->altq_disc;
260
261	IFQ_LOCK_ASSERT(ifq);
262
263	switch (req) {
264	case ALTRQ_PURGE:
265		priq_purge(pif);
266		break;
267	}
268	return (0);
269}
270
271/* discard all the queued packets on the interface */
272static void
273priq_purge(struct priq_if *pif)
274{
275	struct priq_class *cl;
276	int pri;
277
278	for (pri = 0; pri <= pif->pif_maxpri; pri++) {
279		if ((cl = pif->pif_classes[pri]) != NULL && !qempty(cl->cl_q))
280			priq_purgeq(cl);
281	}
282	if (ALTQ_IS_ENABLED(pif->pif_ifq))
283		pif->pif_ifq->ifq_len = 0;
284}
285
286static struct priq_class *
287priq_class_create(struct priq_if *pif, int pri, int qlimit, int flags, int qid)
288{
289	struct priq_class *cl;
290	int s;
291
292#ifndef ALTQ_RED
293	if (flags & PRCF_RED) {
294#ifdef ALTQ_DEBUG
295		printf("priq_class_create: RED not configured for PRIQ!\n");
296#endif
297		return (NULL);
298	}
299#endif
300
301	if ((cl = pif->pif_classes[pri]) != NULL) {
302		/* modify the class instead of creating a new one */
303#ifdef __NetBSD__
304		s = splnet();
305#else
306		s = splimp();
307#endif
308		IFQ_LOCK(cl->cl_pif->pif_ifq);
309		if (!qempty(cl->cl_q))
310			priq_purgeq(cl);
311		IFQ_UNLOCK(cl->cl_pif->pif_ifq);
312		splx(s);
313#ifdef ALTQ_RIO
314		if (q_is_rio(cl->cl_q))
315			rio_destroy((rio_t *)cl->cl_red);
316#endif
317#ifdef ALTQ_RED
318		if (q_is_red(cl->cl_q))
319			red_destroy(cl->cl_red);
320#endif
321	} else {
322		cl = malloc(sizeof(struct priq_class), M_DEVBUF,
323		    M_NOWAIT | M_ZERO);
324		if (cl == NULL)
325			return (NULL);
326
327		cl->cl_q = malloc(sizeof(class_queue_t), M_DEVBUF,
328		    M_NOWAIT | M_ZERO);
329		if (cl->cl_q == NULL)
330			goto err_ret;
331	}
332
333	pif->pif_classes[pri] = cl;
334	if (flags & PRCF_DEFAULTCLASS)
335		pif->pif_default = cl;
336	if (qlimit == 0)
337		qlimit = 50;  /* use default */
338	qlimit(cl->cl_q) = qlimit;
339	qtype(cl->cl_q) = Q_DROPTAIL;
340	qlen(cl->cl_q) = 0;
341	cl->cl_flags = flags;
342	cl->cl_pri = pri;
343	if (pri > pif->pif_maxpri)
344		pif->pif_maxpri = pri;
345	cl->cl_pif = pif;
346	cl->cl_handle = qid;
347
348#ifdef ALTQ_RED
349	if (flags & (PRCF_RED|PRCF_RIO)) {
350		int red_flags, red_pkttime;
351
352		red_flags = 0;
353		if (flags & PRCF_ECN)
354			red_flags |= REDF_ECN;
355#ifdef ALTQ_RIO
356		if (flags & PRCF_CLEARDSCP)
357			red_flags |= RIOF_CLEARDSCP;
358#endif
359		if (pif->pif_bandwidth < 8)
360			red_pkttime = 1000 * 1000 * 1000; /* 1 sec */
361		else
362			red_pkttime = (int64_t)pif->pif_ifq->altq_ifp->if_mtu
363			  * 1000 * 1000 * 1000 / (pif->pif_bandwidth / 8);
364#ifdef ALTQ_RIO
365		if (flags & PRCF_RIO) {
366			cl->cl_red = (red_t *)rio_alloc(0, NULL,
367						red_flags, red_pkttime);
368			if (cl->cl_red == NULL)
369				goto err_ret;
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				goto err_ret;
380			qtype(cl->cl_q) = Q_RED;
381		}
382	}
383#endif /* ALTQ_RED */
384
385	return (cl);
386
387 err_ret:
388	if (cl->cl_red != NULL) {
389#ifdef ALTQ_RIO
390		if (q_is_rio(cl->cl_q))
391			rio_destroy((rio_t *)cl->cl_red);
392#endif
393#ifdef ALTQ_RED
394		if (q_is_red(cl->cl_q))
395			red_destroy(cl->cl_red);
396#endif
397	}
398	if (cl->cl_q != NULL)
399		free(cl->cl_q, M_DEVBUF);
400	free(cl, M_DEVBUF);
401	return (NULL);
402}
403
404static int
405priq_class_destroy(struct priq_class *cl)
406{
407	struct priq_if *pif;
408	int s, pri;
409
410#ifdef __NetBSD__
411	s = splnet();
412#else
413	s = splimp();
414#endif
415	IFQ_LOCK(cl->cl_pif->pif_ifq);
416
417#ifdef ALTQ3_CLFIER_COMPAT
418	/* delete filters referencing to this class */
419	acc_discard_filters(&cl->cl_pif->pif_classifier, cl, 0);
420#endif
421
422	if (!qempty(cl->cl_q))
423		priq_purgeq(cl);
424
425	pif = cl->cl_pif;
426	pif->pif_classes[cl->cl_pri] = NULL;
427	if (pif->pif_maxpri == cl->cl_pri) {
428		for (pri = cl->cl_pri; pri >= 0; pri--)
429			if (pif->pif_classes[pri] != NULL) {
430				pif->pif_maxpri = pri;
431				break;
432			}
433		if (pri < 0)
434			pif->pif_maxpri = -1;
435	}
436	IFQ_UNLOCK(cl->cl_pif->pif_ifq);
437	splx(s);
438
439	if (cl->cl_red != NULL) {
440#ifdef ALTQ_RIO
441		if (q_is_rio(cl->cl_q))
442			rio_destroy((rio_t *)cl->cl_red);
443#endif
444#ifdef ALTQ_RED
445		if (q_is_red(cl->cl_q))
446			red_destroy(cl->cl_red);
447#endif
448	}
449	free(cl->cl_q, M_DEVBUF);
450	free(cl, M_DEVBUF);
451	return (0);
452}
453
454/*
455 * priq_enqueue is an enqueue function to be registered to
456 * (*altq_enqueue) in struct ifaltq.
457 */
458static int
459priq_enqueue(struct ifaltq *ifq, struct mbuf *m, struct altq_pktattr *pktattr)
460{
461	struct priq_if	*pif = (struct priq_if *)ifq->altq_disc;
462	struct priq_class *cl;
463	struct pf_mtag *t;
464	int len;
465
466	IFQ_LOCK_ASSERT(ifq);
467
468	/* grab class set by classifier */
469	if ((m->m_flags & M_PKTHDR) == 0) {
470		/* should not happen */
471		printf("altq: packet for %s does not have pkthdr\n",
472		    ifq->altq_ifp->if_xname);
473		m_freem(m);
474		return (ENOBUFS);
475	}
476	cl = NULL;
477	if ((t = pf_find_mtag(m)) != NULL)
478		cl = clh_to_clp(pif, t->qid);
479#ifdef ALTQ3_COMPAT
480	else if ((ifq->altq_flags & ALTQF_CLASSIFY) && pktattr != NULL)
481		cl = pktattr->pattr_class;
482#endif
483	if (cl == NULL) {
484		cl = pif->pif_default;
485		if (cl == NULL) {
486			m_freem(m);
487			return (ENOBUFS);
488		}
489	}
490#ifdef ALTQ3_COMPAT
491	if (pktattr != NULL)
492		cl->cl_pktattr = pktattr;  /* save proto hdr used by ECN */
493	else
494#endif
495		cl->cl_pktattr = NULL;
496	len = m_pktlen(m);
497	if (priq_addq(cl, m) != 0) {
498		/* drop occurred.  mbuf was freed in priq_addq. */
499		PKTCNTR_ADD(&cl->cl_dropcnt, len);
500		return (ENOBUFS);
501	}
502	IFQ_INC_LEN(ifq);
503
504	/* successfully queued. */
505	return (0);
506}
507
508/*
509 * priq_dequeue is a dequeue function to be registered to
510 * (*altq_dequeue) in struct ifaltq.
511 *
512 * note: ALTDQ_POLL returns the next packet without removing the packet
513 *	from the queue.  ALTDQ_REMOVE is a normal dequeue operation.
514 *	ALTDQ_REMOVE must return the same packet if called immediately
515 *	after ALTDQ_POLL.
516 */
517static struct mbuf *
518priq_dequeue(struct ifaltq *ifq, int op)
519{
520	struct priq_if	*pif = (struct priq_if *)ifq->altq_disc;
521	struct priq_class *cl;
522	struct mbuf *m;
523	int pri;
524
525	IFQ_LOCK_ASSERT(ifq);
526
527	if (IFQ_IS_EMPTY(ifq))
528		/* no packet in the queue */
529		return (NULL);
530
531	for (pri = pif->pif_maxpri;  pri >= 0; pri--) {
532		if ((cl = pif->pif_classes[pri]) != NULL &&
533		    !qempty(cl->cl_q)) {
534			if (op == ALTDQ_POLL)
535				return (priq_pollq(cl));
536
537			m = priq_getq(cl);
538			if (m != NULL) {
539				IFQ_DEC_LEN(ifq);
540				if (qempty(cl->cl_q))
541					cl->cl_period++;
542				PKTCNTR_ADD(&cl->cl_xmitcnt, m_pktlen(m));
543			}
544			return (m);
545		}
546	}
547	return (NULL);
548}
549
550static int
551priq_addq(struct priq_class *cl, struct mbuf *m)
552{
553
554#ifdef ALTQ_RIO
555	if (q_is_rio(cl->cl_q))
556		return rio_addq((rio_t *)cl->cl_red, cl->cl_q, m,
557				cl->cl_pktattr);
558#endif
559#ifdef ALTQ_RED
560	if (q_is_red(cl->cl_q))
561		return red_addq(cl->cl_red, cl->cl_q, m, cl->cl_pktattr);
562#endif
563	if (qlen(cl->cl_q) >= qlimit(cl->cl_q)) {
564		m_freem(m);
565		return (-1);
566	}
567
568	if (cl->cl_flags & PRCF_CLEARDSCP)
569		write_dsfield(m, cl->cl_pktattr, 0);
570
571	_addq(cl->cl_q, m);
572
573	return (0);
574}
575
576static struct mbuf *
577priq_getq(struct priq_class *cl)
578{
579#ifdef ALTQ_RIO
580	if (q_is_rio(cl->cl_q))
581		return rio_getq((rio_t *)cl->cl_red, cl->cl_q);
582#endif
583#ifdef ALTQ_RED
584	if (q_is_red(cl->cl_q))
585		return red_getq(cl->cl_red, cl->cl_q);
586#endif
587	return _getq(cl->cl_q);
588}
589
590static struct mbuf *
591priq_pollq(cl)
592	struct priq_class *cl;
593{
594	return qhead(cl->cl_q);
595}
596
597static void
598priq_purgeq(struct priq_class *cl)
599{
600	struct mbuf *m;
601
602	if (qempty(cl->cl_q))
603		return;
604
605	while ((m = _getq(cl->cl_q)) != NULL) {
606		PKTCNTR_ADD(&cl->cl_dropcnt, m_pktlen(m));
607		m_freem(m);
608	}
609	ASSERT(qlen(cl->cl_q) == 0);
610}
611
612static void
613get_class_stats(struct priq_classstats *sp, struct priq_class *cl)
614{
615	sp->class_handle = cl->cl_handle;
616	sp->qlength = qlen(cl->cl_q);
617	sp->qlimit = qlimit(cl->cl_q);
618	sp->period = cl->cl_period;
619	sp->xmitcnt = cl->cl_xmitcnt;
620	sp->dropcnt = cl->cl_dropcnt;
621
622	sp->qtype = qtype(cl->cl_q);
623#ifdef ALTQ_RED
624	if (q_is_red(cl->cl_q))
625		red_getstats(cl->cl_red, &sp->red[0]);
626#endif
627#ifdef ALTQ_RIO
628	if (q_is_rio(cl->cl_q))
629		rio_getstats((rio_t *)cl->cl_red, &sp->red[0]);
630#endif
631
632}
633
634/* convert a class handle to the corresponding class pointer */
635static struct priq_class *
636clh_to_clp(struct priq_if *pif, u_int32_t chandle)
637{
638	struct priq_class *cl;
639	int idx;
640
641	if (chandle == 0)
642		return (NULL);
643
644	for (idx = pif->pif_maxpri; idx >= 0; idx--)
645		if ((cl = pif->pif_classes[idx]) != NULL &&
646		    cl->cl_handle == chandle)
647			return (cl);
648
649	return (NULL);
650}
651
652
653#ifdef ALTQ3_COMPAT
654
655static struct priq_if *
656priq_attach(ifq, bandwidth)
657	struct ifaltq *ifq;
658	u_int bandwidth;
659{
660	struct priq_if *pif;
661
662	pif = malloc(sizeof(struct priq_if),
663	       M_DEVBUF, M_WAITOK);
664	if (pif == NULL)
665		return (NULL);
666	bzero(pif, sizeof(struct priq_if));
667	pif->pif_bandwidth = bandwidth;
668	pif->pif_maxpri = -1;
669	pif->pif_ifq = ifq;
670
671	/* add this state to the priq list */
672	pif->pif_next = pif_list;
673	pif_list = pif;
674
675	return (pif);
676}
677
678static int
679priq_detach(pif)
680	struct priq_if *pif;
681{
682	(void)priq_clear_interface(pif);
683
684	/* remove this interface from the pif list */
685	if (pif_list == pif)
686		pif_list = pif->pif_next;
687	else {
688		struct priq_if *p;
689
690		for (p = pif_list; p != NULL; p = p->pif_next)
691			if (p->pif_next == pif) {
692				p->pif_next = pif->pif_next;
693				break;
694			}
695		ASSERT(p != NULL);
696	}
697
698	free(pif, M_DEVBUF);
699	return (0);
700}
701
702/*
703 * priq device interface
704 */
705int
706priqopen(dev, flag, fmt, p)
707	dev_t dev;
708	int flag, fmt;
709#if (__FreeBSD_version > 500000)
710	struct thread *p;
711#else
712	struct proc *p;
713#endif
714{
715	/* everything will be done when the queueing scheme is attached. */
716	return 0;
717}
718
719int
720priqclose(dev, flag, fmt, p)
721	dev_t dev;
722	int flag, fmt;
723#if (__FreeBSD_version > 500000)
724	struct thread *p;
725#else
726	struct proc *p;
727#endif
728{
729	struct priq_if *pif;
730	int err, error = 0;
731
732	while ((pif = pif_list) != NULL) {
733		/* destroy all */
734		if (ALTQ_IS_ENABLED(pif->pif_ifq))
735			altq_disable(pif->pif_ifq);
736
737		err = altq_detach(pif->pif_ifq);
738		if (err == 0)
739			err = priq_detach(pif);
740		if (err != 0 && error == 0)
741			error = err;
742	}
743
744	return error;
745}
746
747int
748priqioctl(dev, cmd, addr, flag, p)
749	dev_t dev;
750	ioctlcmd_t cmd;
751	caddr_t addr;
752	int flag;
753#if (__FreeBSD_version > 500000)
754	struct thread *p;
755#else
756	struct proc *p;
757#endif
758{
759	struct priq_if *pif;
760	struct priq_interface *ifacep;
761	int	error = 0;
762
763	/* check super-user privilege */
764	switch (cmd) {
765	case PRIQ_GETSTATS:
766		break;
767	default:
768#if (__FreeBSD_version > 700000)
769		if ((error = priv_check(p, PRIV_ALTQ_MANAGE)) != 0)
770			return (error);
771#elsif (__FreeBSD_version > 400000)
772		if ((error = suser(p)) != 0)
773			return (error);
774#else
775		if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
776			return (error);
777#endif
778		break;
779	}
780
781	switch (cmd) {
782
783	case PRIQ_IF_ATTACH:
784		error = priqcmd_if_attach((struct priq_interface *)addr);
785		break;
786
787	case PRIQ_IF_DETACH:
788		error = priqcmd_if_detach((struct priq_interface *)addr);
789		break;
790
791	case PRIQ_ENABLE:
792	case PRIQ_DISABLE:
793	case PRIQ_CLEAR:
794		ifacep = (struct priq_interface *)addr;
795		if ((pif = altq_lookup(ifacep->ifname,
796				       ALTQT_PRIQ)) == NULL) {
797			error = EBADF;
798			break;
799		}
800
801		switch (cmd) {
802		case PRIQ_ENABLE:
803			if (pif->pif_default == NULL) {
804#ifdef ALTQ_DEBUG
805				printf("priq: no default class\n");
806#endif
807				error = EINVAL;
808				break;
809			}
810			error = altq_enable(pif->pif_ifq);
811			break;
812
813		case PRIQ_DISABLE:
814			error = altq_disable(pif->pif_ifq);
815			break;
816
817		case PRIQ_CLEAR:
818			priq_clear_interface(pif);
819			break;
820		}
821		break;
822
823	case PRIQ_ADD_CLASS:
824		error = priqcmd_add_class((struct priq_add_class *)addr);
825		break;
826
827	case PRIQ_DEL_CLASS:
828		error = priqcmd_delete_class((struct priq_delete_class *)addr);
829		break;
830
831	case PRIQ_MOD_CLASS:
832		error = priqcmd_modify_class((struct priq_modify_class *)addr);
833		break;
834
835	case PRIQ_ADD_FILTER:
836		error = priqcmd_add_filter((struct priq_add_filter *)addr);
837		break;
838
839	case PRIQ_DEL_FILTER:
840		error = priqcmd_delete_filter((struct priq_delete_filter *)addr);
841		break;
842
843	case PRIQ_GETSTATS:
844		error = priqcmd_class_stats((struct priq_class_stats *)addr);
845		break;
846
847	default:
848		error = EINVAL;
849		break;
850	}
851	return error;
852}
853
854static int
855priqcmd_if_attach(ap)
856	struct priq_interface *ap;
857{
858	struct priq_if *pif;
859	struct ifnet *ifp;
860	int error;
861
862	if ((ifp = ifunit(ap->ifname)) == NULL)
863		return (ENXIO);
864
865	if ((pif = priq_attach(&ifp->if_snd, ap->arg)) == NULL)
866		return (ENOMEM);
867
868	/*
869	 * set PRIQ to this ifnet structure.
870	 */
871	if ((error = altq_attach(&ifp->if_snd, ALTQT_PRIQ, pif,
872				 priq_enqueue, priq_dequeue, priq_request,
873				 &pif->pif_classifier, acc_classify)) != 0)
874		(void)priq_detach(pif);
875
876	return (error);
877}
878
879static int
880priqcmd_if_detach(ap)
881	struct priq_interface *ap;
882{
883	struct priq_if *pif;
884	int error;
885
886	if ((pif = altq_lookup(ap->ifname, ALTQT_PRIQ)) == NULL)
887		return (EBADF);
888
889	if (ALTQ_IS_ENABLED(pif->pif_ifq))
890		altq_disable(pif->pif_ifq);
891
892	if ((error = altq_detach(pif->pif_ifq)))
893		return (error);
894
895	return priq_detach(pif);
896}
897
898static int
899priqcmd_add_class(ap)
900	struct priq_add_class *ap;
901{
902	struct priq_if *pif;
903	struct priq_class *cl;
904	int qid;
905
906	if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL)
907		return (EBADF);
908
909	if (ap->pri < 0 || ap->pri >= PRIQ_MAXPRI)
910		return (EINVAL);
911	if (pif->pif_classes[ap->pri] != NULL)
912		return (EBUSY);
913
914	qid = ap->pri + 1;
915	if ((cl = priq_class_create(pif, ap->pri,
916	    ap->qlimit, ap->flags, qid)) == NULL)
917		return (ENOMEM);
918
919	/* return a class handle to the user */
920	ap->class_handle = cl->cl_handle;
921
922	return (0);
923}
924
925static int
926priqcmd_delete_class(ap)
927	struct priq_delete_class *ap;
928{
929	struct priq_if *pif;
930	struct priq_class *cl;
931
932	if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL)
933		return (EBADF);
934
935	if ((cl = clh_to_clp(pif, ap->class_handle)) == NULL)
936		return (EINVAL);
937
938	return priq_class_destroy(cl);
939}
940
941static int
942priqcmd_modify_class(ap)
943	struct priq_modify_class *ap;
944{
945	struct priq_if *pif;
946	struct priq_class *cl;
947
948	if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL)
949		return (EBADF);
950
951	if (ap->pri < 0 || ap->pri >= PRIQ_MAXPRI)
952		return (EINVAL);
953
954	if ((cl = clh_to_clp(pif, ap->class_handle)) == NULL)
955		return (EINVAL);
956
957	/*
958	 * if priority is changed, move the class to the new priority
959	 */
960	if (pif->pif_classes[ap->pri] != cl) {
961		if (pif->pif_classes[ap->pri] != NULL)
962			return (EEXIST);
963		pif->pif_classes[cl->cl_pri] = NULL;
964		pif->pif_classes[ap->pri] = cl;
965		cl->cl_pri = ap->pri;
966	}
967
968	/* call priq_class_create to change class parameters */
969	if ((cl = priq_class_create(pif, ap->pri,
970	    ap->qlimit, ap->flags, ap->class_handle)) == NULL)
971		return (ENOMEM);
972	return 0;
973}
974
975static int
976priqcmd_add_filter(ap)
977	struct priq_add_filter *ap;
978{
979	struct priq_if *pif;
980	struct priq_class *cl;
981
982	if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL)
983		return (EBADF);
984
985	if ((cl = clh_to_clp(pif, ap->class_handle)) == NULL)
986		return (EINVAL);
987
988	return acc_add_filter(&pif->pif_classifier, &ap->filter,
989			      cl, &ap->filter_handle);
990}
991
992static int
993priqcmd_delete_filter(ap)
994	struct priq_delete_filter *ap;
995{
996	struct priq_if *pif;
997
998	if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL)
999		return (EBADF);
1000
1001	return acc_delete_filter(&pif->pif_classifier,
1002				 ap->filter_handle);
1003}
1004
1005static int
1006priqcmd_class_stats(ap)
1007	struct priq_class_stats *ap;
1008{
1009	struct priq_if *pif;
1010	struct priq_class *cl;
1011	struct priq_classstats stats, *usp;
1012	int	pri, error;
1013
1014	if ((pif = altq_lookup(ap->iface.ifname, ALTQT_PRIQ)) == NULL)
1015		return (EBADF);
1016
1017	ap->maxpri = pif->pif_maxpri;
1018
1019	/* then, read the next N classes in the tree */
1020	usp = ap->stats;
1021	for (pri = 0; pri <= pif->pif_maxpri; pri++) {
1022		cl = pif->pif_classes[pri];
1023		if (cl != NULL)
1024			get_class_stats(&stats, cl);
1025		else
1026			bzero(&stats, sizeof(stats));
1027		if ((error = copyout((caddr_t)&stats, (caddr_t)usp++,
1028				     sizeof(stats))) != 0)
1029			return (error);
1030	}
1031	return (0);
1032}
1033
1034#ifdef KLD_MODULE
1035
1036static struct altqsw priq_sw =
1037	{"priq", priqopen, priqclose, priqioctl};
1038
1039ALTQ_MODULE(altq_priq, ALTQT_PRIQ, &priq_sw);
1040MODULE_DEPEND(altq_priq, altq_red, 1, 1, 1);
1041MODULE_DEPEND(altq_priq, altq_rio, 1, 1, 1);
1042
1043#endif /* KLD_MODULE */
1044
1045#endif /* ALTQ3_COMPAT */
1046#endif /* ALTQ_PRIQ */
1047