1 /* $KAME: altq_cbq.c,v 1.20 2004/04/17 10:54:48 kjc Exp $ */
2 /* $DragonFly: src/sys/net/altq/altq_cbq.c,v 1.2 2005/05/24 20:59:05 dillon Exp $ */
5 * Copyright (c) Sun Microsystems, Inc. 1993-1998 All rights reserved.
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18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the SMCC Technology
21 * Development Group at Sun Microsystems, Inc.
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24 * promote products derived from this software without specific prior
27 * SUN MICROSYSTEMS DOES NOT CLAIM MERCHANTABILITY OF THIS SOFTWARE OR THE
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31 * These notices must be retained in any copies of any part of this software.
36 #include "opt_inet6.h"
38 #ifdef ALTQ_CBQ /* cbq is enabled by ALTQ_CBQ option in opt_altq.h */
40 #include <sys/param.h>
41 #include <sys/malloc.h>
43 #include <sys/socket.h>
44 #include <sys/systm.h>
46 #include <sys/callout.h>
47 #include <sys/errno.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_cbq.h>
59 #include <sys/thread2.h>
62 * Forward Declarations.
64 static int cbq_class_destroy(cbq_state_t *, struct rm_class *);
65 static struct rm_class *clh_to_clp(cbq_state_t *, uint32_t);
66 static int cbq_clear_interface(cbq_state_t *);
67 static int cbq_request(struct ifaltq *, int, void *);
68 static int cbq_enqueue(struct ifaltq *, struct mbuf *,
69 struct altq_pktattr *);
70 static struct mbuf *cbq_dequeue(struct ifaltq *, int);
71 static void cbqrestart(struct ifaltq *);
72 static void get_class_stats(class_stats_t *, struct rm_class *);
73 static void cbq_purge(cbq_state_t *);
77 * cbq_class_destroy(cbq_mod_state_t *, struct rm_class *) - This
78 * function destroys a given traffic class. Before destroying
79 * the class, all traffic for that class is released.
82 cbq_class_destroy(cbq_state_t *cbqp, struct rm_class *cl)
86 /* delete the class */
87 rmc_delete_class(&cbqp->ifnp, cl);
90 * free the class handle
92 for (i = 0; i < CBQ_MAX_CLASSES; i++)
93 if (cbqp->cbq_class_tbl[i] == cl)
94 cbqp->cbq_class_tbl[i] = NULL;
96 if (cl == cbqp->ifnp.root_)
97 cbqp->ifnp.root_ = NULL;
98 if (cl == cbqp->ifnp.default_)
99 cbqp->ifnp.default_ = NULL;
103 /* convert class handle to class pointer */
104 static struct rm_class *
105 clh_to_clp(cbq_state_t *cbqp, uint32_t chandle)
113 * first, try optimistically the slot matching the lower bits of
114 * the handle. if it fails, do the linear table search.
116 i = chandle % CBQ_MAX_CLASSES;
117 if ((cl = cbqp->cbq_class_tbl[i]) != NULL &&
118 cl->stats_.handle == chandle)
120 for (i = 0; i < CBQ_MAX_CLASSES; i++)
121 if ((cl = cbqp->cbq_class_tbl[i]) != NULL &&
122 cl->stats_.handle == chandle)
128 cbq_clear_interface(cbq_state_t *cbqp)
133 /* clear out the classes now */
136 for (i = 0; i < CBQ_MAX_CLASSES; i++) {
137 if ((cl = cbqp->cbq_class_tbl[i]) != NULL) {
138 if (is_a_parent_class(cl))
141 cbq_class_destroy(cbqp, cl);
142 cbqp->cbq_class_tbl[i] = NULL;
143 if (cl == cbqp->ifnp.root_)
144 cbqp->ifnp.root_ = NULL;
145 if (cl == cbqp->ifnp.default_)
146 cbqp->ifnp.default_ = NULL;
156 cbq_request(struct ifaltq *ifq, int req, void *arg)
158 cbq_state_t *cbqp = (cbq_state_t *)ifq->altq_disc;
170 /* copy the stats info in rm_class to class_states_t */
172 get_class_stats(class_stats_t *statsp, struct rm_class *cl)
174 statsp->xmit_cnt = cl->stats_.xmit_cnt;
175 statsp->drop_cnt = cl->stats_.drop_cnt;
176 statsp->over = cl->stats_.over;
177 statsp->borrows = cl->stats_.borrows;
178 statsp->overactions = cl->stats_.overactions;
179 statsp->delays = cl->stats_.delays;
181 statsp->depth = cl->depth_;
182 statsp->priority = cl->pri_;
183 statsp->maxidle = cl->maxidle_;
184 statsp->minidle = cl->minidle_;
185 statsp->offtime = cl->offtime_;
186 statsp->qmax = qlimit(cl->q_);
187 statsp->ns_per_byte = cl->ns_per_byte_;
188 statsp->wrr_allot = cl->w_allotment_;
189 statsp->qcnt = qlen(cl->q_);
190 statsp->avgidle = cl->avgidle_;
192 statsp->qtype = qtype(cl->q_);
194 if (q_is_red(cl->q_))
195 red_getstats(cl->red_, &statsp->red[0]);
198 if (q_is_rio(cl->q_))
199 rio_getstats((rio_t *)cl->red_, &statsp->red[0]);
204 cbq_pfattach(struct pf_altq *a)
209 if ((ifp = ifunit(a->ifname)) == NULL || a->altq_disc == NULL)
212 error = altq_attach(&ifp->if_snd, ALTQT_CBQ, a->altq_disc,
213 cbq_enqueue, cbq_dequeue, cbq_request, NULL, NULL);
219 cbq_add_altq(struct pf_altq *a)
224 if ((ifp = ifunit(a->ifname)) == NULL)
226 if (!ifq_is_ready(&ifp->if_snd))
229 /* allocate and initialize cbq_state_t */
230 cbqp = malloc(sizeof(*cbqp), M_ALTQ, M_WAITOK | M_ZERO);
231 callout_init(&cbqp->cbq_callout);
233 cbqp->ifnp.ifq_ = &ifp->if_snd; /* keep the ifq */
235 /* keep the state in pf_altq */
242 cbq_remove_altq(struct pf_altq *a)
246 if ((cbqp = a->altq_disc) == NULL)
250 cbq_clear_interface(cbqp);
252 if (cbqp->ifnp.default_)
253 cbq_class_destroy(cbqp, cbqp->ifnp.default_);
254 if (cbqp->ifnp.root_)
255 cbq_class_destroy(cbqp, cbqp->ifnp.root_);
257 /* deallocate cbq_state_t */
264 cbq_add_queue(struct pf_altq *a)
266 struct rm_class *borrow, *parent;
269 struct cbq_opts *opts;
272 if ((cbqp = a->altq_disc) == NULL)
278 * find a free slot in the class table. if the slot matching
279 * the lower bits of qid is free, use this slot. otherwise,
280 * use the first free slot.
282 i = a->qid % CBQ_MAX_CLASSES;
283 if (cbqp->cbq_class_tbl[i] != NULL) {
284 for (i = 0; i < CBQ_MAX_CLASSES; i++)
285 if (cbqp->cbq_class_tbl[i] == NULL)
287 if (i == CBQ_MAX_CLASSES)
291 opts = &a->pq_u.cbq_opts;
292 /* check parameters */
293 if (a->priority >= CBQ_MAXPRI)
296 /* Get pointers to parent and borrow classes. */
297 parent = clh_to_clp(cbqp, a->parent_qid);
298 if (opts->flags & CBQCLF_BORROW)
304 * A class must borrow from it's parent or it can not
305 * borrow at all. Hence, borrow can be null.
307 if (parent == NULL && (opts->flags & CBQCLF_ROOTCLASS) == 0) {
308 printf("cbq_add_queue: no parent class!\n");
312 if ((borrow != parent) && (borrow != NULL)) {
313 printf("cbq_add_class: borrow class != parent\n");
320 switch (opts->flags & CBQCLF_CLASSMASK) {
321 case CBQCLF_ROOTCLASS:
324 if (cbqp->ifnp.root_)
327 case CBQCLF_DEFCLASS:
328 if (cbqp->ifnp.default_)
336 /* more than two flags bits set */
341 * create a class. if this is a root class, initialize the
344 if ((opts->flags & CBQCLF_CLASSMASK) == CBQCLF_ROOTCLASS) {
345 rmc_init(cbqp->ifnp.ifq_, &cbqp->ifnp, opts->ns_per_byte,
346 cbqrestart, a->qlimit, RM_MAXQUEUED,
347 opts->maxidle, opts->minidle, opts->offtime,
349 cl = cbqp->ifnp.root_;
351 cl = rmc_newclass(a->priority,
352 &cbqp->ifnp, opts->ns_per_byte,
353 rmc_delay_action, a->qlimit, parent, borrow,
354 opts->maxidle, opts->minidle, opts->offtime,
355 opts->pktsize, opts->flags);
360 /* return handle to user space. */
361 cl->stats_.handle = a->qid;
362 cl->stats_.depth = cl->depth_;
364 /* save the allocated class */
365 cbqp->cbq_class_tbl[i] = cl;
367 if ((opts->flags & CBQCLF_CLASSMASK) == CBQCLF_DEFCLASS)
368 cbqp->ifnp.default_ = cl;
374 cbq_remove_queue(struct pf_altq *a)
380 if ((cbqp = a->altq_disc) == NULL)
383 if ((cl = clh_to_clp(cbqp, a->qid)) == NULL)
386 /* if we are a parent class, then return an error. */
387 if (is_a_parent_class(cl))
390 /* delete the class */
391 rmc_delete_class(&cbqp->ifnp, cl);
394 * free the class handle
396 for (i = 0; i < CBQ_MAX_CLASSES; i++)
397 if (cbqp->cbq_class_tbl[i] == cl) {
398 cbqp->cbq_class_tbl[i] = NULL;
399 if (cl == cbqp->ifnp.root_)
400 cbqp->ifnp.root_ = NULL;
401 if (cl == cbqp->ifnp.default_)
402 cbqp->ifnp.default_ = NULL;
410 cbq_getqstats(struct pf_altq *a, void *ubuf, int *nbytes)
417 if ((cbqp = altq_lookup(a->ifname, ALTQT_CBQ)) == NULL)
420 if ((cl = clh_to_clp(cbqp, a->qid)) == NULL)
423 if (*nbytes < sizeof(stats))
426 get_class_stats(&stats, cl);
428 if ((error = copyout((caddr_t)&stats, ubuf, sizeof(stats))) != 0)
430 *nbytes = sizeof(stats);
436 * cbq_enqueue(struct ifaltq *ifq, struct mbuf *m, struct altq_pktattr *pattr)
437 * - Queue data packets.
439 * cbq_enqueue is set to ifp->if_altqenqueue and called by an upper
440 * layer (e.g. ether_output). cbq_enqueue queues the given packet
441 * to the cbq, then invokes the driver's start routine.
443 * Returns: 0 if the queueing is successful.
444 * ENOBUFS if a packet dropping occurred as a result of
449 cbq_enqueue(struct ifaltq *ifq, struct mbuf *m, struct altq_pktattr *pktattr)
451 cbq_state_t *cbqp = (cbq_state_t *)ifq->altq_disc;
455 /* grab class set by classifier */
456 if ((m->m_flags & M_PKTHDR) == 0) {
457 /* should not happen */
458 if_printf(ifq->altq_ifp, "altq: packet does not have pkthdr\n");
462 if (m->m_pkthdr.fw_flags & ALTQ_MBUF_TAGGED)
463 cl = clh_to_clp(cbqp, m->m_pkthdr.altq_qid);
467 cl = cbqp->ifnp.default_;
476 if (rmc_queue_packet(cl, m) != 0) {
477 /* drop occurred. some mbuf was freed in rmc_queue_packet. */
478 PKTCNTR_ADD(&cl->stats_.drop_cnt, len);
483 /* successfully queued. */
491 cbq_dequeue(struct ifaltq *ifq, int op)
493 cbq_state_t *cbqp = (cbq_state_t *)ifq->altq_disc;
497 m = rmc_dequeue_next(&cbqp->ifnp, op);
499 if (m && op == ALTDQ_REMOVE) {
500 --cbqp->cbq_qlen; /* decrement # of packets in cbq */
503 /* Update the class. */
504 rmc_update_class_util(&cbqp->ifnp);
512 * cbqrestart(queue_t *) - Restart sending of data.
513 * called from rmc_restart in a critical section via timeout after waking up
519 cbqrestart(struct ifaltq *ifq)
524 if (!ifq_is_enabled(ifq))
525 /* cbq must have been detached */
528 if ((cbqp = (cbq_state_t *)ifq->altq_disc) == NULL)
529 /* should not happen */
534 cbqp->cbq_qlen > 0 && (ifp->if_flags & IFF_OACTIVE) == 0)
535 (*ifp->if_start)(ifp);
539 cbq_purge(cbq_state_t *cbqp)
543 for (i = 0; i < CBQ_MAX_CLASSES; i++) {
544 if ((cl = cbqp->cbq_class_tbl[i]) != NULL)
547 if (ifq_is_enabled(cbqp->ifnp.ifq_))
548 cbqp->ifnp.ifq_->ifq_len = 0;
551 #endif /* ALTQ_CBQ */