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altq_wfq.c revision 1.9.12.3
      1 /*	$NetBSD: altq_wfq.c,v 1.9.12.3 2006/09/25 03:56:59 peter Exp $	*/
      2 /*	$KAME: altq_wfq.c,v 1.14 2005/04/13 03:44:25 suz Exp $	*/
      3 
      4 /*
      5  * Copyright (C) 1997-2002
      6  *	Sony Computer Science Laboratories Inc.  All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     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.
     16  *
     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
     27  * SUCH DAMAGE.
     28  */
     29 /*
     30  *  March 27, 1997.  Written by Hiroshi Kyusojin of Keio University
     31  *  (kyu (at) mt.cs.keio.ac.jp).
     32  */
     33 
     34 #include <sys/cdefs.h>
     35 __KERNEL_RCSID(0, "$NetBSD: altq_wfq.c,v 1.9.12.3 2006/09/25 03:56:59 peter Exp $");
     36 
     37 #ifdef _KERNEL_OPT
     38 #include "opt_altq.h"
     39 #include "opt_inet.h"
     40 #endif
     41 
     42 #ifdef ALTQ_WFQ
     43 
     44 #include <sys/param.h>
     45 #include <sys/malloc.h>
     46 #include <sys/mbuf.h>
     47 #include <sys/uio.h>
     48 #include <sys/socket.h>
     49 #include <sys/systm.h>
     50 #include <sys/proc.h>
     51 #include <sys/errno.h>
     52 #include <sys/time.h>
     53 #include <sys/kernel.h>
     54 #include <sys/kauth.h>
     55 
     56 #include <net/if.h>
     57 #include <net/if_types.h>
     58 #include <netinet/in.h>
     59 
     60 #include <altq/altq.h>
     61 #include <altq/altq_conf.h>
     62 #include <altq/altq_wfq.h>
     63 
     64 #ifdef ALTQ3_COMPAT
     65 /*
     66 #define	WFQ_DEBUG
     67 */
     68 
     69 static int		wfq_setenable(struct wfq_interface *, int);
     70 static int		wfq_ifattach(struct wfq_interface *);
     71 static int		wfq_ifdetach(struct wfq_interface *);
     72 static int		wfq_ifenqueue(struct ifaltq *, struct mbuf *,
     73 				      struct altq_pktattr *);
     74 static u_long		wfq_hash(struct flowinfo *, int);
     75 static inline u_long	wfq_hashbydstaddr(struct flowinfo *, int);
     76 static inline u_long	wfq_hashbysrcport(struct flowinfo *, int);
     77 static wfq		*wfq_maxqueue(wfq_state_t *);
     78 static struct mbuf	*wfq_ifdequeue(struct ifaltq *, int);
     79 static int		wfq_getqid(struct wfq_getqid *);
     80 static int		wfq_setweight(struct wfq_setweight *);
     81 static int		wfq_getstats(struct wfq_getstats *);
     82 static int		wfq_config(struct wfq_conf *);
     83 static int		wfq_request(struct ifaltq *, int, void *);
     84 static int		wfq_flush(struct ifaltq *);
     85 static void		*wfq_classify(void *, struct mbuf *, int);
     86 
     87 /* global value : pointer to wfq queue list */
     88 static wfq_state_t *wfq_list = NULL;
     89 
     90 static int
     91 wfq_setenable(ifacep, flag)
     92 	struct wfq_interface *ifacep;
     93 	int flag;
     94 {
     95 	wfq_state_t *wfqp;
     96 	int error = 0;
     97 
     98 	if ((wfqp = altq_lookup(ifacep->wfq_ifacename, ALTQT_WFQ)) == NULL)
     99 		return (EBADF);
    100 
    101 	switch(flag){
    102 	case ENABLE:
    103 		error = altq_enable(wfqp->ifq);
    104 		break;
    105 	case DISABLE:
    106 		error = altq_disable(wfqp->ifq);
    107 		break;
    108 	}
    109 	return error;
    110 }
    111 
    112 
    113 static int
    114 wfq_ifattach(ifacep)
    115 	struct wfq_interface *ifacep;
    116 {
    117 	int error = 0, i;
    118 	struct ifnet *ifp;
    119 	wfq_state_t *new_wfqp;
    120 	wfq *queue;
    121 
    122 	if ((ifp = ifunit(ifacep->wfq_ifacename)) == NULL) {
    123 #ifdef WFQ_DEBUG
    124 		printf("wfq_ifattach()...no ifp found\n");
    125 #endif
    126 		return (ENXIO);
    127 	}
    128 
    129 	if (!ALTQ_IS_READY(&ifp->if_snd)) {
    130 #ifdef WFQ_DEBUG
    131 		printf("wfq_ifattach()...altq is not ready\n");
    132 #endif
    133 		return (ENXIO);
    134 	}
    135 
    136 	/* allocate and initialize wfq_state_t */
    137 	new_wfqp = malloc(sizeof(wfq_state_t), M_DEVBUF, M_WAITOK|M_ZERO);
    138 	if (new_wfqp == NULL)
    139 		return (ENOMEM);
    140 
    141 	queue = malloc(sizeof(wfq) * DEFAULT_QSIZE, M_DEVBUF, M_WAITOK|M_ZERO);
    142 	if (queue == NULL) {
    143 		free(new_wfqp, M_DEVBUF);
    144 		return (ENOMEM);
    145 	}
    146 
    147 	/* keep the ifq */
    148 	new_wfqp->ifq = &ifp->if_snd;
    149 	new_wfqp->nums = DEFAULT_QSIZE;
    150 	new_wfqp->hwm = HWM;
    151 	new_wfqp->bytes = 0;
    152 	new_wfqp->rrp = NULL;
    153 	new_wfqp->queue = queue;
    154 	new_wfqp->hash_func = wfq_hashbydstaddr;
    155 	new_wfqp->fbmask = FIMB4_DADDR;
    156 
    157 	for (i = 0; i < new_wfqp->nums; i++, queue++) {
    158 		queue->next = queue->prev = NULL;
    159 		queue->head = queue->tail = NULL;
    160 		queue->bytes = queue->quota = 0;
    161 		queue->weight = 100;
    162 	}
    163 
    164 	/*
    165 	 * set WFQ to this ifnet structure.
    166 	 */
    167 	if ((error = altq_attach(&ifp->if_snd, ALTQT_WFQ, new_wfqp,
    168 				 wfq_ifenqueue, wfq_ifdequeue, wfq_request,
    169 				 new_wfqp, wfq_classify)) != 0) {
    170 		free(queue, M_DEVBUF);
    171 		free(new_wfqp, M_DEVBUF);
    172 		return (error);
    173 	}
    174 
    175 	new_wfqp->next = wfq_list;
    176 	wfq_list = new_wfqp;
    177 
    178 	return (error);
    179 }
    180 
    181 
    182 static int
    183 wfq_ifdetach(ifacep)
    184 	struct wfq_interface *ifacep;
    185 {
    186 	int		error = 0;
    187 	wfq_state_t	*wfqp;
    188 
    189 	if ((wfqp = altq_lookup(ifacep->wfq_ifacename, ALTQT_WFQ)) == NULL)
    190 		return (EBADF);
    191 
    192 	/* free queued mbuf */
    193 	wfq_flush(wfqp->ifq);
    194 
    195 	/* remove WFQ from the ifnet structure. */
    196 	(void)altq_disable(wfqp->ifq);
    197 	(void)altq_detach(wfqp->ifq);
    198 
    199 	/* remove from the wfqstate list */
    200 	if (wfq_list == wfqp)
    201 		wfq_list = wfqp->next;
    202 	else {
    203 		wfq_state_t *wp = wfq_list;
    204 		do {
    205 			if (wp->next == wfqp) {
    206 				wp->next = wfqp->next;
    207 				break;
    208 			}
    209 		} while ((wp = wp->next) != NULL);
    210 	}
    211 
    212 	/* deallocate wfq_state_t */
    213 	free(wfqp->queue, M_DEVBUF);
    214 	free(wfqp, M_DEVBUF);
    215 	return (error);
    216 }
    217 
    218 static int
    219 wfq_request(ifq, req, arg)
    220 	struct ifaltq *ifq;
    221 	int req;
    222 	void *arg;
    223 {
    224 	wfq_state_t *wfqp = (wfq_state_t *)ifq->altq_disc;
    225 
    226 	switch (req) {
    227 	case ALTRQ_PURGE:
    228 		wfq_flush(wfqp->ifq);
    229 		break;
    230 	}
    231 	return (0);
    232 }
    233 
    234 
    235 static int
    236 wfq_flush(ifq)
    237 	struct ifaltq *ifq;
    238 {
    239 	struct mbuf *mp;
    240 
    241 	while ((mp = wfq_ifdequeue(ifq, ALTDQ_REMOVE)) != NULL)
    242 		m_freem(mp);
    243 	if (ALTQ_IS_ENABLED(ifq))
    244 		ifq->ifq_len = 0;
    245 	return 0;
    246 }
    247 
    248 static void *
    249 wfq_classify(clfier, m, af)
    250 	void *clfier;
    251 	struct mbuf *m;
    252 	int af;
    253 {
    254 	wfq_state_t *wfqp = (wfq_state_t *)clfier;
    255 	struct flowinfo flow;
    256 
    257 	altq_extractflow(m, af, &flow, wfqp->fbmask);
    258 	return (&wfqp->queue[(*wfqp->hash_func)(&flow, wfqp->nums)]);
    259 }
    260 
    261 static int
    262 wfq_ifenqueue(ifq, mp, pktattr)
    263 	struct ifaltq *ifq;
    264 	struct mbuf *mp;
    265 	struct altq_pktattr *pktattr;
    266 {
    267 	wfq_state_t *wfqp;
    268 	wfq *queue;
    269 	int byte, error = 0;
    270 
    271 	wfqp = (wfq_state_t *)ifq->altq_disc;
    272 	mp->m_nextpkt = NULL;
    273 
    274 	/* grab a queue selected by classifier */
    275 	if (pktattr == NULL || (queue = pktattr->pattr_class) == NULL)
    276 		queue = &wfqp->queue[0];
    277 
    278 	if (queue->tail == NULL)
    279 		queue->head = mp;
    280 	else
    281 		queue->tail->m_nextpkt = mp;
    282 	queue->tail = mp;
    283 	byte = mp->m_pkthdr.len;
    284 	queue->bytes += byte;
    285 	wfqp->bytes += byte;
    286 	ifq->ifq_len++;
    287 
    288 	if (queue->next == NULL) {
    289 		/* this queue gets active. add the queue to the active list */
    290 		if (wfqp->rrp == NULL){
    291 			/* no queue in the active list */
    292 			queue->next = queue->prev = queue;
    293 			wfqp->rrp = queue;
    294 			WFQ_ADDQUOTA(queue);
    295 		} else {
    296 			/* insert the queue at the tail of the active list */
    297 			queue->prev = wfqp->rrp->prev;
    298 			wfqp->rrp->prev->next = queue;
    299 			wfqp->rrp->prev = queue;
    300 			queue->next = wfqp->rrp;
    301 			queue->quota = 0;
    302 		}
    303 	}
    304 
    305 	/* check overflow. if the total size exceeds the high water mark,
    306 	   drop packets from the longest queue. */
    307 	while (wfqp->bytes > wfqp->hwm) {
    308 		wfq *drop_queue = wfq_maxqueue(wfqp);
    309 
    310 		/* drop the packet at the head. */
    311 		mp = drop_queue->head;
    312 		if ((drop_queue->head = mp->m_nextpkt) == NULL)
    313 			drop_queue->tail = NULL;
    314 		mp->m_nextpkt = NULL;
    315 		byte = mp->m_pkthdr.len;
    316 		drop_queue->bytes -= byte;
    317 		PKTCNTR_ADD(&drop_queue->drop_cnt, byte);
    318 		wfqp->bytes -= byte;
    319 		m_freem(mp);
    320 		ifq->ifq_len--;
    321 		if(drop_queue == queue)
    322 			/* the queue for this flow is selected to drop */
    323 			error = ENOBUFS;
    324 	}
    325 	return error;
    326 }
    327 
    328 
    329 static u_long wfq_hash(flow, n)
    330 	struct flowinfo *flow;
    331 	int n;
    332 {
    333 	u_long val = 0;
    334 
    335 	if (flow != NULL) {
    336 		if (flow->fi_family == AF_INET) {
    337 			struct flowinfo_in *fp = (struct flowinfo_in *)flow;
    338 			u_long val2;
    339 
    340 			val = fp->fi_dst.s_addr ^ fp->fi_src.s_addr;
    341 			val = val ^ (val >> 8) ^ (val >> 16) ^ (val >> 24);
    342 			val2 = fp->fi_dport ^ fp->fi_sport ^ fp->fi_proto;
    343 			val2 = val2 ^ (val2 >> 8);
    344 			val = val ^ val2;
    345 		}
    346 #ifdef INET6
    347 		else if (flow->fi_family == AF_INET6) {
    348 			struct flowinfo_in6 *fp6 = (struct flowinfo_in6 *)flow;
    349 
    350 			val = ntohl(fp6->fi6_flowlabel);
    351 		}
    352 #endif
    353 	}
    354 
    355 	return (val % n);
    356 }
    357 
    358 
    359 static inline u_long wfq_hashbydstaddr(flow, n)
    360 	struct flowinfo *flow;
    361 	int n;
    362 {
    363 	u_long val = 0;
    364 
    365 	if (flow != NULL) {
    366 		if (flow->fi_family == AF_INET) {
    367 			struct flowinfo_in *fp = (struct flowinfo_in *)flow;
    368 
    369 			val = fp->fi_dst.s_addr;
    370 			val = val ^ (val >> 8) ^ (val >> 16) ^ (val >> 24);
    371 		}
    372 #ifdef INET6
    373 		else if (flow->fi_family == AF_INET6) {
    374 			struct flowinfo_in6 *fp6 = (struct flowinfo_in6 *)flow;
    375 
    376 			val = ntohl(fp6->fi6_flowlabel);
    377 		}
    378 #endif
    379 	}
    380 
    381 	return (val % n);
    382 }
    383 
    384 static inline u_long wfq_hashbysrcport(flow, n)
    385 	struct flowinfo *flow;
    386 	int n;
    387 {
    388 	u_long val = 0;
    389 
    390 	if (flow != NULL) {
    391 		if (flow->fi_family == AF_INET) {
    392 			struct flowinfo_in *fp = (struct flowinfo_in *)flow;
    393 
    394 			val = fp->fi_sport;
    395 		}
    396 #ifdef INET6
    397 		else if (flow->fi_family == AF_INET6) {
    398 			struct flowinfo_in6 *fp6 = (struct flowinfo_in6 *)flow;
    399 
    400 			val = fp6->fi6_sport;
    401 		}
    402 #endif
    403 	}
    404 	val = val ^ (val >> 8);
    405 
    406 	return (val % n);
    407 }
    408 
    409 static wfq *wfq_maxqueue(wfqp)
    410 	wfq_state_t *wfqp;
    411 {
    412 	int byte, max_byte = 0;
    413 	wfq *queue, *max_queue = NULL;
    414 
    415 	if((queue = wfqp->rrp) == NULL)
    416 		/* never happens */
    417 		return NULL;
    418 	do{
    419 		if ((byte = queue->bytes * 100 / queue->weight) > max_byte) {
    420 			max_queue = queue;
    421 			max_byte = byte;
    422 		}
    423 	} while ((queue = queue->next) != wfqp->rrp);
    424 
    425 	return max_queue;
    426 }
    427 
    428 
    429 static struct mbuf *
    430 wfq_ifdequeue(ifq, op)
    431 	struct ifaltq *ifq;
    432 	int op;
    433 {
    434 	wfq_state_t *wfqp;
    435 	wfq *queue;
    436 	struct mbuf *mp;
    437 	int byte;
    438 
    439 	wfqp = (wfq_state_t *)ifq->altq_disc;
    440 
    441 	if ((wfqp->bytes == 0) || ((queue = wfqp->rrp) == NULL))
    442 		/* no packet in the queues */
    443 		return NULL;
    444 
    445 	while (1) {
    446 		if (queue->quota > 0) {
    447 			if (queue->bytes <= 0) {
    448 				/* this queue no longer has packet.
    449 				   remove the queue from the active list. */
    450 				if (queue->next == queue){
    451 					/* no other active queue
    452 					   -- this case never happens in
    453 					   this algorithm. */
    454 					queue->next = queue->prev = NULL;
    455 					wfqp->rrp = NULL;
    456 					return NULL;
    457 				} else {
    458 					queue->prev->next = queue->next;
    459 					queue->next->prev = queue->prev;
    460 					/* the round-robin pointer points
    461 					   to this queue, advance the rrp */
    462 					wfqp->rrp = queue->next;
    463 					queue->next = queue->prev = NULL;
    464 					queue = wfqp->rrp;
    465 					WFQ_ADDQUOTA(queue);
    466 					continue;
    467 				}
    468 			}
    469 
    470 			/* dequeue a packet from this queue */
    471 			mp = queue->head;
    472 			if (op == ALTDQ_REMOVE) {
    473 				if((queue->head = mp->m_nextpkt) == NULL)
    474 					queue->tail = NULL;
    475 				byte = mp->m_pkthdr.len;
    476 				mp->m_nextpkt = NULL;
    477 				queue->quota -= byte;
    478 				queue->bytes -= byte;
    479 				PKTCNTR_ADD(&queue->xmit_cnt, byte);
    480 				wfqp->bytes -= byte;
    481 				if (ALTQ_IS_ENABLED(ifq))
    482 					ifq->ifq_len--;
    483 			}
    484 			return mp;
    485 
    486 			/* if the queue gets empty by this dequeueing,
    487 			   the queue will be removed from the active list
    488 			   at the next round */
    489 		}
    490 
    491 		/* advance the round-robin pointer */
    492 		queue = wfqp->rrp = queue->next;
    493 		WFQ_ADDQUOTA(queue);
    494 	}
    495 }
    496 
    497 static int
    498 wfq_getqid(gqidp)
    499 	struct wfq_getqid *gqidp;
    500 {
    501 	wfq_state_t *wfqp;
    502 
    503 	if ((wfqp = altq_lookup(gqidp->iface.wfq_ifacename, ALTQT_WFQ))
    504 	    == NULL)
    505 		return (EBADF);
    506 
    507 	gqidp->qid = (*wfqp->hash_func)(&gqidp->flow, wfqp->nums);
    508 	return 0;
    509 }
    510 
    511 static int
    512 wfq_setweight(swp)
    513 	struct wfq_setweight *swp;
    514 {
    515 	wfq_state_t	*wfqp;
    516 	wfq *queue;
    517 	int old;
    518 
    519 	if (swp->weight < 0) {
    520 		printf("set weight in natural number\n");
    521 		return (EINVAL);
    522 	}
    523 
    524 	if ((wfqp = altq_lookup(swp->iface.wfq_ifacename, ALTQT_WFQ)) == NULL)
    525 		return (EBADF);
    526 
    527 	queue = &wfqp->queue[swp->qid];
    528 	old = queue->weight;
    529 	queue->weight = swp->weight;
    530 	swp->weight = old;
    531 	return 0;
    532 }
    533 
    534 
    535 static int
    536 wfq_getstats(gsp)
    537 	struct wfq_getstats *gsp;
    538 {
    539 	wfq_state_t	*wfqp;
    540 	wfq *queue;
    541 	queue_stats *stats;
    542 
    543 	if ((wfqp = altq_lookup(gsp->iface.wfq_ifacename, ALTQT_WFQ)) == NULL)
    544 		return (EBADF);
    545 
    546 	if (gsp->qid >= wfqp->nums)
    547 		return (EINVAL);
    548 
    549 	queue = &wfqp->queue[gsp->qid];
    550 	stats = &gsp->stats;
    551 
    552 	stats->bytes		= queue->bytes;
    553 	stats->weight		= queue->weight;
    554 	stats->xmit_cnt		= queue->xmit_cnt;
    555 	stats->drop_cnt		= queue->drop_cnt;
    556 
    557 	return 0;
    558 }
    559 
    560 
    561 static int
    562 wfq_config(cf)
    563 	struct wfq_conf *cf;
    564 {
    565 	wfq_state_t	*wfqp;
    566 	wfq		*queue;
    567 	int		i, error = 0;
    568 
    569 	if ((wfqp = altq_lookup(cf->iface.wfq_ifacename, ALTQT_WFQ)) == NULL)
    570 		return (EBADF);
    571 
    572 	if(cf->nqueues <= 0 ||  MAX_QSIZE < cf->nqueues)
    573 		cf->nqueues = DEFAULT_QSIZE;
    574 
    575 	if (cf->nqueues != wfqp->nums) {
    576 		/* free queued mbuf */
    577 		wfq_flush(wfqp->ifq);
    578 		free(wfqp->queue, M_DEVBUF);
    579 
    580 		queue = malloc(sizeof(wfq) * cf->nqueues, M_DEVBUF,
    581 		    M_WAITOK|M_ZERO);
    582 		if (queue == NULL)
    583 			return (ENOMEM);
    584 
    585 		wfqp->nums = cf->nqueues;
    586 		wfqp->bytes = 0;
    587 		wfqp->rrp = NULL;
    588 		wfqp->queue = queue;
    589 		for (i = 0; i < wfqp->nums; i++, queue++) {
    590 			queue->next = queue->prev = NULL;
    591 			queue->head = queue->tail = NULL;
    592 			queue->bytes = queue->quota = 0;
    593 			queue->weight = 100;
    594 		}
    595 	}
    596 
    597 	if (cf->qlimit != 0)
    598 		wfqp->hwm = cf->qlimit;
    599 
    600 	switch (cf->hash_policy) {
    601 	case WFQ_HASH_DSTADDR:
    602 		wfqp->hash_func = wfq_hashbydstaddr;
    603 		wfqp->fbmask = FIMB4_DADDR;
    604 #ifdef INET6
    605 		wfqp->fbmask |= FIMB6_FLABEL;	/* use flowlabel for ipv6 */
    606 #endif
    607 		break;
    608 	case WFQ_HASH_SRCPORT:
    609 		wfqp->hash_func = wfq_hashbysrcport;
    610 		wfqp->fbmask = FIMB4_SPORT;
    611 #ifdef INET6
    612 		wfqp->fbmask |= FIMB6_SPORT;
    613 #endif
    614 		break;
    615 	case WFQ_HASH_FULL:
    616 		wfqp->hash_func = wfq_hash;
    617 		wfqp->fbmask = FIMB4_ALL;
    618 #ifdef INET6
    619 		wfqp->fbmask |= FIMB6_FLABEL;	/* use flowlabel for ipv6 */
    620 #endif
    621 		break;
    622 	default:
    623 		error = EINVAL;
    624 		break;
    625 	}
    626 	return error;
    627 }
    628 
    629 /*
    630  * wfq device interface
    631  */
    632 
    633 altqdev_decl(wfq);
    634 
    635 int
    636 wfqopen(dev, flag, fmt, l)
    637 	dev_t dev;
    638 	int flag, fmt;
    639 	struct lwp *l;
    640 {
    641 	return 0;
    642 }
    643 
    644 int
    645 wfqclose(dev, flag, fmt, l)
    646 	dev_t dev;
    647 	int flag, fmt;
    648 	struct lwp *l;
    649 {
    650 	struct ifnet *ifp;
    651 	struct wfq_interface iface;
    652 	wfq_state_t *wfqp;
    653 	int s;
    654 
    655 	s = splnet();
    656 	while ((wfqp = wfq_list) != NULL) {
    657 		ifp = wfqp->ifq->altq_ifp;
    658 		sprintf(iface.wfq_ifacename, "%s", ifp->if_xname);
    659 		wfq_ifdetach(&iface);
    660 	}
    661 	splx(s);
    662 	return 0;
    663 }
    664 
    665 int
    666 wfqioctl(dev, cmd, addr, flag, l)
    667 	dev_t dev;
    668 	ioctlcmd_t cmd;
    669 	caddr_t addr;
    670 	int flag;
    671 	struct lwp *l;
    672 {
    673 	int	error = 0;
    674 	int 	s;
    675 
    676 	/* check cmd for superuser only */
    677 	switch (cmd) {
    678 	case WFQ_GET_QID:
    679 	case WFQ_GET_STATS:
    680 		break;
    681 	default:
    682 #if (__FreeBSD_version > 400000)
    683 		if ((error = suser(p)) != 0)
    684 #else
    685 		if ((error = kauth_authorize_generic(l->l_cred,
    686 		    KAUTH_GENERIC_ISSUSER, &l->l_acflag)) != 0)
    687 #endif
    688 			return (error);
    689 		break;
    690 	}
    691 
    692 	s = splnet();
    693 	switch (cmd) {
    694 
    695 	case WFQ_ENABLE:
    696 		error = wfq_setenable((struct wfq_interface *)addr, ENABLE);
    697 		break;
    698 
    699 	case WFQ_DISABLE:
    700 		error = wfq_setenable((struct wfq_interface *)addr, DISABLE);
    701 		break;
    702 
    703 	case WFQ_IF_ATTACH:
    704 		error = wfq_ifattach((struct wfq_interface *)addr);
    705 		break;
    706 
    707 	case WFQ_IF_DETACH:
    708 		error = wfq_ifdetach((struct wfq_interface *)addr);
    709 		break;
    710 
    711 	case WFQ_GET_QID:
    712 		error = wfq_getqid((struct wfq_getqid *)addr);
    713 		break;
    714 
    715 	case WFQ_SET_WEIGHT:
    716 		error = wfq_setweight((struct wfq_setweight *)addr);
    717 		break;
    718 
    719 	case WFQ_GET_STATS:
    720 		error = wfq_getstats((struct wfq_getstats *)addr);
    721 		break;
    722 
    723 	case WFQ_CONFIG:
    724 		error = wfq_config((struct wfq_conf *)addr);
    725 		break;
    726 
    727 	default:
    728 		error = EINVAL;
    729 		break;
    730 	}
    731 	splx(s);
    732 	return error;
    733 }
    734 
    735 #ifdef KLD_MODULE
    736 
    737 static struct altqsw wfq_sw =
    738 	{"wfq", wfqopen, wfqclose, wfqioctl};
    739 
    740 ALTQ_MODULE(altq_wfq, ALTQT_WFQ, &wfq_sw);
    741 
    742 #endif /* KLD_MODULE */
    743 
    744 #endif /* ALTQ3_COMPAT */
    745 #endif /* ALTQ_WFQ */
    746