1 /* $KAME: altq_priq.c,v 1.12 2004/04/17 10:54:48 kjc Exp $ */
2 /* $DragonFly: src/sys/net/altq/altq_priq.c,v 1.5 2005/11/22 00:24:35 dillon Exp $ */
5 * Copyright (C) 2000-2003
6 * Sony Computer Science Laboratories Inc. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY SONY CSL AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL SONY CSL OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 #include "opt_inet6.h"
37 #ifdef ALTQ_PRIQ /* priq is enabled by ALTQ_PRIQ option in opt_altq.h */
39 #include <sys/param.h>
40 #include <sys/malloc.h>
42 #include <sys/socket.h>
43 #include <sys/sockio.h>
44 #include <sys/systm.h>
46 #include <sys/errno.h>
47 #include <sys/kernel.h>
48 #include <sys/queue.h>
49 #include <sys/thread.h>
52 #include <net/ifq_var.h>
53 #include <netinet/in.h>
55 #include <net/pf/pfvar.h>
56 #include <net/altq/altq.h>
57 #include <net/altq/altq_priq.h>
59 #include <sys/thread2.h>
64 static int priq_clear_interface(struct priq_if *);
65 static int priq_request(struct ifaltq *, int, void *);
66 static void priq_purge(struct priq_if *);
67 static struct priq_class *priq_class_create(struct priq_if *, int, int, int, int);
68 static int priq_class_destroy(struct priq_class *);
69 static int priq_enqueue(struct ifaltq *, struct mbuf *, struct altq_pktattr *);
70 static struct mbuf *priq_dequeue(struct ifaltq *, struct mbuf *, int);
72 static int priq_addq(struct priq_class *, struct mbuf *);
73 static struct mbuf *priq_getq(struct priq_class *);
74 static struct mbuf *priq_pollq(struct priq_class *);
75 static void priq_purgeq(struct priq_class *);
77 static void get_class_stats(struct priq_classstats *, struct priq_class *);
78 static struct priq_class *clh_to_clp(struct priq_if *, uint32_t);
81 priq_pfattach(struct pf_altq *a)
86 if ((ifp = ifunit(a->ifname)) == NULL || a->altq_disc == NULL)
89 error = altq_attach(&ifp->if_snd, ALTQT_PRIQ, a->altq_disc,
90 priq_enqueue, priq_dequeue, priq_request, NULL, NULL);
96 priq_add_altq(struct pf_altq *a)
101 if ((ifp = ifunit(a->ifname)) == NULL)
103 if (!ifq_is_ready(&ifp->if_snd))
106 pif = malloc(sizeof(*pif), M_ALTQ, M_WAITOK | M_ZERO);
107 pif->pif_bandwidth = a->ifbandwidth;
108 pif->pif_maxpri = -1;
109 pif->pif_ifq = &ifp->if_snd;
111 /* keep the state in pf_altq */
118 priq_remove_altq(struct pf_altq *a)
122 if ((pif = a->altq_disc) == NULL)
126 priq_clear_interface(pif);
133 priq_add_queue(struct pf_altq *a)
136 struct priq_class *cl;
138 if ((pif = a->altq_disc) == NULL)
141 /* check parameters */
142 if (a->priority >= PRIQ_MAXPRI)
146 if (pif->pif_classes[a->priority] != NULL)
148 if (clh_to_clp(pif, a->qid) != NULL)
151 cl = priq_class_create(pif, a->priority, a->qlimit,
152 a->pq_u.priq_opts.flags, a->qid);
160 priq_remove_queue(struct pf_altq *a)
163 struct priq_class *cl;
165 if ((pif = a->altq_disc) == NULL)
168 if ((cl = clh_to_clp(pif, a->qid)) == NULL)
171 return (priq_class_destroy(cl));
175 priq_getqstats(struct pf_altq *a, void *ubuf, int *nbytes)
178 struct priq_class *cl;
179 struct priq_classstats stats;
182 if ((pif = altq_lookup(a->ifname, ALTQT_PRIQ)) == NULL)
185 if ((cl = clh_to_clp(pif, a->qid)) == NULL)
188 if (*nbytes < sizeof(stats))
191 get_class_stats(&stats, cl);
193 if ((error = copyout((caddr_t)&stats, ubuf, sizeof(stats))) != 0)
195 *nbytes = sizeof(stats);
200 * bring the interface back to the initial state by discarding
201 * all the filters and classes.
204 priq_clear_interface(struct priq_if *pif)
206 struct priq_class *cl;
209 /* clear out the classes */
210 for (pri = 0; pri <= pif->pif_maxpri; pri++) {
211 if ((cl = pif->pif_classes[pri]) != NULL)
212 priq_class_destroy(cl);
219 priq_request(struct ifaltq *ifq, int req, void *arg)
221 struct priq_if *pif = (struct priq_if *)ifq->altq_disc;
233 /* discard all the queued packets on the interface */
235 priq_purge(struct priq_if *pif)
237 struct priq_class *cl;
240 for (pri = 0; pri <= pif->pif_maxpri; pri++) {
241 if ((cl = pif->pif_classes[pri]) != NULL && !qempty(cl->cl_q))
244 if (ifq_is_enabled(pif->pif_ifq))
245 pif->pif_ifq->ifq_len = 0;
248 static struct priq_class *
249 priq_class_create(struct priq_if *pif, int pri, int qlimit, int flags, int qid)
251 struct priq_class *cl;
254 if (flags & PRCF_RED) {
256 printf("priq_class_create: RED not configured for PRIQ!\n");
262 if ((cl = pif->pif_classes[pri]) != NULL) {
263 /* modify the class instead of creating a new one */
265 if (!qempty(cl->cl_q))
269 if (q_is_rio(cl->cl_q))
270 rio_destroy((rio_t *)cl->cl_red);
273 if (q_is_red(cl->cl_q))
274 red_destroy(cl->cl_red);
277 cl = malloc(sizeof(*cl), M_ALTQ, M_WAITOK | M_ZERO);
278 cl->cl_q = malloc(sizeof(*cl->cl_q), M_ALTQ, M_WAITOK | M_ZERO);
281 pif->pif_classes[pri] = cl;
282 if (flags & PRCF_DEFAULTCLASS)
283 pif->pif_default = cl;
285 qlimit = 50; /* use default */
286 qlimit(cl->cl_q) = qlimit;
287 qtype(cl->cl_q) = Q_DROPTAIL;
289 cl->cl_flags = flags;
291 if (pri > pif->pif_maxpri)
292 pif->pif_maxpri = pri;
297 if (flags & (PRCF_RED|PRCF_RIO)) {
298 int red_flags, red_pkttime;
301 if (flags & PRCF_ECN)
302 red_flags |= REDF_ECN;
304 if (flags & PRCF_CLEARDSCP)
305 red_flags |= RIOF_CLEARDSCP;
307 if (pif->pif_bandwidth < 8)
308 red_pkttime = 1000 * 1000 * 1000; /* 1 sec */
310 red_pkttime = (int64_t)pif->pif_ifq->altq_ifp->if_mtu
311 * 1000 * 1000 * 1000 / (pif->pif_bandwidth / 8);
313 if (flags & PRCF_RIO) {
314 cl->cl_red = (red_t *)rio_alloc(0, NULL,
315 red_flags, red_pkttime);
316 if (cl->cl_red != NULL)
317 qtype(cl->cl_q) = Q_RIO;
320 if (flags & PRCF_RED) {
321 cl->cl_red = red_alloc(0, 0,
322 qlimit(cl->cl_q) * 10/100,
323 qlimit(cl->cl_q) * 30/100,
324 red_flags, red_pkttime);
325 if (cl->cl_red != NULL)
326 qtype(cl->cl_q) = Q_RED;
329 #endif /* ALTQ_RED */
335 priq_class_destroy(struct priq_class *cl)
342 if (!qempty(cl->cl_q))
346 pif->pif_classes[cl->cl_pri] = NULL;
347 if (pif->pif_maxpri == cl->cl_pri) {
348 for (pri = cl->cl_pri; pri >= 0; pri--)
349 if (pif->pif_classes[pri] != NULL) {
350 pif->pif_maxpri = pri;
354 pif->pif_maxpri = -1;
358 if (cl->cl_red != NULL) {
360 if (q_is_rio(cl->cl_q))
361 rio_destroy((rio_t *)cl->cl_red);
364 if (q_is_red(cl->cl_q))
365 red_destroy(cl->cl_red);
368 free(cl->cl_q, M_ALTQ);
374 * priq_enqueue is an enqueue function to be registered to
375 * (*altq_enqueue) in struct ifaltq.
378 priq_enqueue(struct ifaltq *ifq, struct mbuf *m, struct altq_pktattr *pktattr)
380 struct priq_if *pif = (struct priq_if *)ifq->altq_disc;
381 struct priq_class *cl;
387 /* grab class set by classifier */
388 if ((m->m_flags & M_PKTHDR) == 0) {
389 /* should not happen */
390 if_printf(ifq->altq_ifp, "altq: packet does not have pkthdr\n");
396 if (m->m_pkthdr.fw_flags & ALTQ_MBUF_TAGGED)
397 cl = clh_to_clp(pif, m->m_pkthdr.altq_qid);
401 cl = pif->pif_default;
408 cl->cl_pktattr = NULL;
410 if (priq_addq(cl, m) != 0) {
411 /* drop occurred. mbuf was freed in priq_addq. */
412 PKTCNTR_ADD(&cl->cl_dropcnt, len);
424 * priq_dequeue is a dequeue function to be registered to
425 * (*altq_dequeue) in struct ifaltq.
427 * note: ALTDQ_POLL returns the next packet without removing the packet
428 * from the queue. ALTDQ_REMOVE is a normal dequeue operation.
429 * ALTDQ_REMOVE must return the same packet if called immediately
433 priq_dequeue(struct ifaltq *ifq, struct mbuf *mpolled, int op)
435 struct priq_if *pif = (struct priq_if *)ifq->altq_disc;
436 struct priq_class *cl;
440 if (ifq_is_empty(ifq)) {
441 /* no packet in the queue */
442 KKASSERT(mpolled == NULL);
448 for (pri = pif->pif_maxpri; pri >= 0; pri--) {
449 if ((cl = pif->pif_classes[pri]) != NULL && !qempty(cl->cl_q)) {
450 if (op == ALTDQ_POLL) {
458 if (qempty(cl->cl_q))
460 PKTCNTR_ADD(&cl->cl_xmitcnt, m_pktlen(m));
466 KKASSERT(mpolled == NULL || mpolled == m);
471 priq_addq(struct priq_class *cl, struct mbuf *m)
474 if (q_is_rio(cl->cl_q))
475 return rio_addq((rio_t *)cl->cl_red, cl->cl_q, m,
479 if (q_is_red(cl->cl_q))
480 return red_addq(cl->cl_red, cl->cl_q, m, cl->cl_pktattr);
482 if (qlen(cl->cl_q) >= qlimit(cl->cl_q)) {
487 if (cl->cl_flags & PRCF_CLEARDSCP)
488 write_dsfield(m, cl->cl_pktattr, 0);
496 priq_getq(struct priq_class *cl)
499 if (q_is_rio(cl->cl_q))
500 return rio_getq((rio_t *)cl->cl_red, cl->cl_q);
503 if (q_is_red(cl->cl_q))
504 return red_getq(cl->cl_red, cl->cl_q);
506 return _getq(cl->cl_q);
510 priq_pollq(struct priq_class *cl)
512 return qhead(cl->cl_q);
516 priq_purgeq(struct priq_class *cl)
520 if (qempty(cl->cl_q))
523 while ((m = _getq(cl->cl_q)) != NULL) {
524 PKTCNTR_ADD(&cl->cl_dropcnt, m_pktlen(m));
527 KKASSERT(qlen(cl->cl_q) == 0);
531 get_class_stats(struct priq_classstats *sp, struct priq_class *cl)
533 sp->class_handle = cl->cl_handle;
534 sp->qlength = qlen(cl->cl_q);
535 sp->qlimit = qlimit(cl->cl_q);
536 sp->period = cl->cl_period;
537 sp->xmitcnt = cl->cl_xmitcnt;
538 sp->dropcnt = cl->cl_dropcnt;
540 sp->qtype = qtype(cl->cl_q);
542 if (q_is_red(cl->cl_q))
543 red_getstats(cl->cl_red, &sp->red[0]);
546 if (q_is_rio(cl->cl_q))
547 rio_getstats((rio_t *)cl->cl_red, &sp->red[0]);
551 /* convert a class handle to the corresponding class pointer */
552 static struct priq_class *
553 clh_to_clp(struct priq_if *pif, uint32_t chandle)
555 struct priq_class *cl;
561 for (idx = pif->pif_maxpri; idx >= 0; idx--)
562 if ((cl = pif->pif_classes[idx]) != NULL &&
563 cl->cl_handle == chandle)
569 #endif /* ALTQ_PRIQ */