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f0706e82 JB |
1 | /* |
2 | * Copyright 2004, Instant802 Networks, Inc. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 as | |
6 | * published by the Free Software Foundation. | |
7 | */ | |
8 | ||
9 | #include <linux/netdevice.h> | |
10 | #include <linux/skbuff.h> | |
11 | #include <linux/module.h> | |
12 | #include <linux/if_arp.h> | |
13 | #include <linux/types.h> | |
14 | #include <net/ip.h> | |
15 | #include <net/pkt_sched.h> | |
16 | ||
17 | #include <net/mac80211.h> | |
18 | #include "ieee80211_i.h" | |
19 | #include "wme.h" | |
20 | ||
f0706e82 JB |
21 | /* maximum number of hardware queues we support. */ |
22 | #define TC_80211_MAX_QUEUES 8 | |
23 | ||
24 | struct ieee80211_sched_data | |
25 | { | |
26 | struct tcf_proto *filter_list; | |
27 | struct Qdisc *queues[TC_80211_MAX_QUEUES]; | |
28 | struct sk_buff_head requeued[TC_80211_MAX_QUEUES]; | |
29 | }; | |
30 | ||
31 | ||
32 | /* given a data frame determine the 802.1p/1d tag to use */ | |
33 | static inline unsigned classify_1d(struct sk_buff *skb, struct Qdisc *qd) | |
34 | { | |
35 | struct iphdr *ip; | |
36 | int dscp; | |
37 | int offset; | |
38 | ||
39 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
40 | struct tcf_result res = { -1, 0 }; | |
41 | ||
42 | /* if there is a user set filter list, call out to that */ | |
43 | if (q->filter_list) { | |
44 | tc_classify(skb, q->filter_list, &res); | |
45 | if (res.class != -1) | |
46 | return res.class; | |
47 | } | |
48 | ||
49 | /* skb->priority values from 256->263 are magic values to | |
50 | * directly indicate a specific 802.1d priority. | |
51 | * This is used to allow 802.1d priority to be passed directly in | |
52 | * from VLAN tags, etc. */ | |
53 | if (skb->priority >= 256 && skb->priority <= 263) | |
54 | return skb->priority - 256; | |
55 | ||
56 | /* check there is a valid IP header present */ | |
57 | offset = ieee80211_get_hdrlen_from_skb(skb) + 8 /* LLC + proto */; | |
58 | if (skb->protocol != __constant_htons(ETH_P_IP) || | |
59 | skb->len < offset + sizeof(*ip)) | |
60 | return 0; | |
61 | ||
62 | ip = (struct iphdr *) (skb->data + offset); | |
63 | ||
64 | dscp = ip->tos & 0xfc; | |
65 | if (dscp & 0x1c) | |
66 | return 0; | |
67 | return dscp >> 5; | |
68 | } | |
69 | ||
70 | ||
71 | static inline int wme_downgrade_ac(struct sk_buff *skb) | |
72 | { | |
73 | switch (skb->priority) { | |
74 | case 6: | |
75 | case 7: | |
76 | skb->priority = 5; /* VO -> VI */ | |
77 | return 0; | |
78 | case 4: | |
79 | case 5: | |
80 | skb->priority = 3; /* VI -> BE */ | |
81 | return 0; | |
82 | case 0: | |
83 | case 3: | |
84 | skb->priority = 2; /* BE -> BK */ | |
85 | return 0; | |
86 | default: | |
87 | return -1; | |
88 | } | |
89 | } | |
90 | ||
91 | ||
92 | /* positive return value indicates which queue to use | |
93 | * negative return value indicates to drop the frame */ | |
94 | static inline int classify80211(struct sk_buff *skb, struct Qdisc *qd) | |
95 | { | |
96 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
97 | struct ieee80211_tx_packet_data *pkt_data = | |
98 | (struct ieee80211_tx_packet_data *) skb->cb; | |
99 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
100 | unsigned short fc = le16_to_cpu(hdr->frame_control); | |
101 | int qos; | |
102 | const int ieee802_1d_to_ac[8] = { 2, 3, 3, 2, 1, 1, 0, 0 }; | |
103 | ||
104 | /* see if frame is data or non data frame */ | |
105 | if (unlikely((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA)) { | |
106 | /* management frames go on AC_VO queue, but are sent | |
107 | * without QoS control fields */ | |
108 | return IEEE80211_TX_QUEUE_DATA0; | |
109 | } | |
110 | ||
e8bf9649 | 111 | if (unlikely(pkt_data->flags & IEEE80211_TXPD_MGMT_IFACE)) { |
f0706e82 JB |
112 | /* Data frames from hostapd (mainly, EAPOL) use AC_VO |
113 | * and they will include QoS control fields if | |
114 | * the target STA is using WME. */ | |
115 | skb->priority = 7; | |
116 | return ieee802_1d_to_ac[skb->priority]; | |
117 | } | |
118 | ||
119 | /* is this a QoS frame? */ | |
120 | qos = fc & IEEE80211_STYPE_QOS_DATA; | |
121 | ||
122 | if (!qos) { | |
123 | skb->priority = 0; /* required for correct WPA/11i MIC */ | |
124 | return ieee802_1d_to_ac[skb->priority]; | |
125 | } | |
126 | ||
127 | /* use the data classifier to determine what 802.1d tag the | |
3c3b00ca | 128 | * data frame has */ |
f0706e82 JB |
129 | skb->priority = classify_1d(skb, qd); |
130 | ||
3c3b00ca | 131 | /* in case we are a client verify acm is not set for this ac */ |
f0706e82 JB |
132 | while (unlikely(local->wmm_acm & BIT(skb->priority))) { |
133 | if (wme_downgrade_ac(skb)) { | |
3c3b00ca | 134 | /* No AC with lower priority has acm=0, drop packet. */ |
f0706e82 JB |
135 | return -1; |
136 | } | |
137 | } | |
138 | ||
139 | /* look up which queue to use for frames with this 1d tag */ | |
140 | return ieee802_1d_to_ac[skb->priority]; | |
141 | } | |
142 | ||
143 | ||
144 | static int wme_qdiscop_enqueue(struct sk_buff *skb, struct Qdisc* qd) | |
145 | { | |
146 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
147 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
148 | struct ieee80211_tx_packet_data *pkt_data = | |
149 | (struct ieee80211_tx_packet_data *) skb->cb; | |
150 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
151 | unsigned short fc = le16_to_cpu(hdr->frame_control); | |
152 | struct Qdisc *qdisc; | |
153 | int err, queue; | |
154 | ||
e8bf9649 | 155 | if (pkt_data->flags & IEEE80211_TXPD_REQUEUE) { |
f0706e82 JB |
156 | skb_queue_tail(&q->requeued[pkt_data->queue], skb); |
157 | qd->q.qlen++; | |
158 | return 0; | |
159 | } | |
160 | ||
161 | queue = classify80211(skb, qd); | |
162 | ||
163 | /* now we know the 1d priority, fill in the QoS header if there is one | |
164 | */ | |
165 | if (WLAN_FC_IS_QOS_DATA(fc)) { | |
166 | u8 *p = skb->data + ieee80211_get_hdrlen(fc) - 2; | |
167 | u8 qos_hdr = skb->priority & QOS_CONTROL_TAG1D_MASK; | |
168 | if (local->wifi_wme_noack_test) | |
169 | qos_hdr |= QOS_CONTROL_ACK_POLICY_NOACK << | |
170 | QOS_CONTROL_ACK_POLICY_SHIFT; | |
171 | /* qos header is 2 bytes, second reserved */ | |
172 | *p = qos_hdr; | |
173 | p++; | |
174 | *p = 0; | |
175 | } | |
176 | ||
177 | if (unlikely(queue >= local->hw.queues)) { | |
178 | #if 0 | |
179 | if (net_ratelimit()) { | |
180 | printk(KERN_DEBUG "%s - queue=%d (hw does not " | |
181 | "support) -> %d\n", | |
182 | __func__, queue, local->hw.queues - 1); | |
183 | } | |
184 | #endif | |
185 | queue = local->hw.queues - 1; | |
186 | } | |
187 | ||
188 | if (unlikely(queue < 0)) { | |
189 | kfree_skb(skb); | |
190 | err = NET_XMIT_DROP; | |
191 | } else { | |
192 | pkt_data->queue = (unsigned int) queue; | |
193 | qdisc = q->queues[queue]; | |
194 | err = qdisc->enqueue(skb, qdisc); | |
195 | if (err == NET_XMIT_SUCCESS) { | |
196 | qd->q.qlen++; | |
197 | qd->bstats.bytes += skb->len; | |
198 | qd->bstats.packets++; | |
199 | return NET_XMIT_SUCCESS; | |
200 | } | |
201 | } | |
202 | qd->qstats.drops++; | |
203 | return err; | |
204 | } | |
205 | ||
206 | ||
207 | /* TODO: clean up the cases where master_hard_start_xmit | |
208 | * returns non 0 - it shouldn't ever do that. Once done we | |
209 | * can remove this function */ | |
210 | static int wme_qdiscop_requeue(struct sk_buff *skb, struct Qdisc* qd) | |
211 | { | |
212 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
213 | struct ieee80211_tx_packet_data *pkt_data = | |
214 | (struct ieee80211_tx_packet_data *) skb->cb; | |
215 | struct Qdisc *qdisc; | |
216 | int err; | |
217 | ||
218 | /* we recorded which queue to use earlier! */ | |
219 | qdisc = q->queues[pkt_data->queue]; | |
220 | ||
221 | if ((err = qdisc->ops->requeue(skb, qdisc)) == 0) { | |
222 | qd->q.qlen++; | |
223 | return 0; | |
224 | } | |
225 | qd->qstats.drops++; | |
226 | return err; | |
227 | } | |
228 | ||
229 | ||
230 | static struct sk_buff *wme_qdiscop_dequeue(struct Qdisc* qd) | |
231 | { | |
232 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
233 | struct net_device *dev = qd->dev; | |
234 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
235 | struct ieee80211_hw *hw = &local->hw; | |
236 | struct sk_buff *skb; | |
237 | struct Qdisc *qdisc; | |
238 | int queue; | |
239 | ||
240 | /* check all the h/w queues in numeric/priority order */ | |
241 | for (queue = 0; queue < hw->queues; queue++) { | |
242 | /* see if there is room in this hardware queue */ | |
243 | if (test_bit(IEEE80211_LINK_STATE_XOFF, | |
244 | &local->state[queue]) || | |
245 | test_bit(IEEE80211_LINK_STATE_PENDING, | |
246 | &local->state[queue])) | |
247 | continue; | |
248 | ||
249 | /* there is space - try and get a frame */ | |
250 | skb = skb_dequeue(&q->requeued[queue]); | |
251 | if (skb) { | |
252 | qd->q.qlen--; | |
253 | return skb; | |
254 | } | |
255 | ||
256 | qdisc = q->queues[queue]; | |
257 | skb = qdisc->dequeue(qdisc); | |
258 | if (skb) { | |
259 | qd->q.qlen--; | |
260 | return skb; | |
261 | } | |
262 | } | |
263 | /* returning a NULL here when all the h/w queues are full means we | |
264 | * never need to call netif_stop_queue in the driver */ | |
265 | return NULL; | |
266 | } | |
267 | ||
268 | ||
269 | static void wme_qdiscop_reset(struct Qdisc* qd) | |
270 | { | |
271 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
272 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
273 | struct ieee80211_hw *hw = &local->hw; | |
274 | int queue; | |
275 | ||
276 | /* QUESTION: should we have some hardware flush functionality here? */ | |
277 | ||
278 | for (queue = 0; queue < hw->queues; queue++) { | |
279 | skb_queue_purge(&q->requeued[queue]); | |
280 | qdisc_reset(q->queues[queue]); | |
281 | } | |
282 | qd->q.qlen = 0; | |
283 | } | |
284 | ||
285 | ||
286 | static void wme_qdiscop_destroy(struct Qdisc* qd) | |
287 | { | |
288 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
289 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
290 | struct ieee80211_hw *hw = &local->hw; | |
291 | int queue; | |
292 | ||
293 | tcf_destroy_chain(q->filter_list); | |
294 | q->filter_list = NULL; | |
295 | ||
296 | for (queue=0; queue < hw->queues; queue++) { | |
297 | skb_queue_purge(&q->requeued[queue]); | |
298 | qdisc_destroy(q->queues[queue]); | |
299 | q->queues[queue] = &noop_qdisc; | |
300 | } | |
301 | } | |
302 | ||
303 | ||
304 | /* called whenever parameters are updated on existing qdisc */ | |
305 | static int wme_qdiscop_tune(struct Qdisc *qd, struct rtattr *opt) | |
306 | { | |
307 | /* struct ieee80211_sched_data *q = qdisc_priv(qd); | |
308 | */ | |
309 | /* check our options block is the right size */ | |
310 | /* copy any options to our local structure */ | |
311 | /* Ignore options block for now - always use static mapping | |
312 | struct tc_ieee80211_qopt *qopt = RTA_DATA(opt); | |
313 | ||
314 | if (opt->rta_len < RTA_LENGTH(sizeof(*qopt))) | |
315 | return -EINVAL; | |
316 | memcpy(q->tag2queue, qopt->tag2queue, sizeof(qopt->tag2queue)); | |
317 | */ | |
318 | return 0; | |
319 | } | |
320 | ||
321 | ||
322 | /* called during initial creation of qdisc on device */ | |
323 | static int wme_qdiscop_init(struct Qdisc *qd, struct rtattr *opt) | |
324 | { | |
325 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
326 | struct net_device *dev = qd->dev; | |
327 | struct ieee80211_local *local; | |
328 | int queues; | |
329 | int err = 0, i; | |
330 | ||
331 | /* check that device is a mac80211 device */ | |
332 | if (!dev->ieee80211_ptr || | |
333 | dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) | |
334 | return -EINVAL; | |
335 | ||
336 | /* check this device is an ieee80211 master type device */ | |
337 | if (dev->type != ARPHRD_IEEE80211) | |
338 | return -EINVAL; | |
339 | ||
340 | /* check that there is no qdisc currently attached to device | |
341 | * this ensures that we will be the root qdisc. (I can't find a better | |
342 | * way to test this explicitly) */ | |
343 | if (dev->qdisc_sleeping != &noop_qdisc) | |
344 | return -EINVAL; | |
345 | ||
346 | if (qd->flags & TCQ_F_INGRESS) | |
347 | return -EINVAL; | |
348 | ||
349 | local = wdev_priv(dev->ieee80211_ptr); | |
350 | queues = local->hw.queues; | |
351 | ||
352 | /* if options were passed in, set them */ | |
353 | if (opt) { | |
354 | err = wme_qdiscop_tune(qd, opt); | |
355 | } | |
356 | ||
357 | /* create child queues */ | |
358 | for (i = 0; i < queues; i++) { | |
359 | skb_queue_head_init(&q->requeued[i]); | |
360 | q->queues[i] = qdisc_create_dflt(qd->dev, &pfifo_qdisc_ops, | |
361 | qd->handle); | |
136e83d6 | 362 | if (!q->queues[i]) { |
f0706e82 JB |
363 | q->queues[i] = &noop_qdisc; |
364 | printk(KERN_ERR "%s child qdisc %i creation failed", dev->name, i); | |
365 | } | |
366 | } | |
367 | ||
368 | return err; | |
369 | } | |
370 | ||
371 | static int wme_qdiscop_dump(struct Qdisc *qd, struct sk_buff *skb) | |
372 | { | |
373 | /* struct ieee80211_sched_data *q = qdisc_priv(qd); | |
374 | unsigned char *p = skb->tail; | |
375 | struct tc_ieee80211_qopt opt; | |
376 | ||
377 | memcpy(&opt.tag2queue, q->tag2queue, TC_80211_MAX_TAG + 1); | |
378 | RTA_PUT(skb, TCA_OPTIONS, sizeof(opt), &opt); | |
379 | */ return skb->len; | |
380 | /* | |
381 | rtattr_failure: | |
382 | skb_trim(skb, p - skb->data);*/ | |
383 | return -1; | |
384 | } | |
385 | ||
386 | ||
387 | static int wme_classop_graft(struct Qdisc *qd, unsigned long arg, | |
388 | struct Qdisc *new, struct Qdisc **old) | |
389 | { | |
390 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
391 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
392 | struct ieee80211_hw *hw = &local->hw; | |
393 | unsigned long queue = arg - 1; | |
394 | ||
395 | if (queue >= hw->queues) | |
396 | return -EINVAL; | |
397 | ||
398 | if (!new) | |
399 | new = &noop_qdisc; | |
400 | ||
401 | sch_tree_lock(qd); | |
402 | *old = q->queues[queue]; | |
403 | q->queues[queue] = new; | |
404 | qdisc_reset(*old); | |
405 | sch_tree_unlock(qd); | |
406 | ||
407 | return 0; | |
408 | } | |
409 | ||
410 | ||
411 | static struct Qdisc * | |
412 | wme_classop_leaf(struct Qdisc *qd, unsigned long arg) | |
413 | { | |
414 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
415 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
416 | struct ieee80211_hw *hw = &local->hw; | |
417 | unsigned long queue = arg - 1; | |
418 | ||
419 | if (queue >= hw->queues) | |
420 | return NULL; | |
421 | ||
422 | return q->queues[queue]; | |
423 | } | |
424 | ||
425 | ||
426 | static unsigned long wme_classop_get(struct Qdisc *qd, u32 classid) | |
427 | { | |
428 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
429 | struct ieee80211_hw *hw = &local->hw; | |
430 | unsigned long queue = TC_H_MIN(classid); | |
431 | ||
432 | if (queue - 1 >= hw->queues) | |
433 | return 0; | |
434 | ||
435 | return queue; | |
436 | } | |
437 | ||
438 | ||
439 | static unsigned long wme_classop_bind(struct Qdisc *qd, unsigned long parent, | |
440 | u32 classid) | |
441 | { | |
442 | return wme_classop_get(qd, classid); | |
443 | } | |
444 | ||
445 | ||
446 | static void wme_classop_put(struct Qdisc *q, unsigned long cl) | |
447 | { | |
448 | } | |
449 | ||
450 | ||
451 | static int wme_classop_change(struct Qdisc *qd, u32 handle, u32 parent, | |
452 | struct rtattr **tca, unsigned long *arg) | |
453 | { | |
454 | unsigned long cl = *arg; | |
455 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
456 | struct ieee80211_hw *hw = &local->hw; | |
457 | ||
458 | if (cl - 1 > hw->queues) | |
459 | return -ENOENT; | |
460 | ||
461 | /* TODO: put code to program hardware queue parameters here, | |
462 | * to allow programming from tc command line */ | |
463 | ||
464 | return 0; | |
465 | } | |
466 | ||
467 | ||
468 | /* we don't support deleting hardware queues | |
469 | * when we add WMM-SA support - TSPECs may be deleted here */ | |
470 | static int wme_classop_delete(struct Qdisc *qd, unsigned long cl) | |
471 | { | |
472 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
473 | struct ieee80211_hw *hw = &local->hw; | |
474 | ||
475 | if (cl - 1 > hw->queues) | |
476 | return -ENOENT; | |
477 | return 0; | |
478 | } | |
479 | ||
480 | ||
481 | static int wme_classop_dump_class(struct Qdisc *qd, unsigned long cl, | |
482 | struct sk_buff *skb, struct tcmsg *tcm) | |
483 | { | |
484 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
485 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
486 | struct ieee80211_hw *hw = &local->hw; | |
487 | ||
488 | if (cl - 1 > hw->queues) | |
489 | return -ENOENT; | |
490 | tcm->tcm_handle = TC_H_MIN(cl); | |
491 | tcm->tcm_parent = qd->handle; | |
492 | tcm->tcm_info = q->queues[cl-1]->handle; /* do we need this? */ | |
493 | return 0; | |
494 | } | |
495 | ||
496 | ||
497 | static void wme_classop_walk(struct Qdisc *qd, struct qdisc_walker *arg) | |
498 | { | |
499 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
500 | struct ieee80211_hw *hw = &local->hw; | |
501 | int queue; | |
502 | ||
503 | if (arg->stop) | |
504 | return; | |
505 | ||
506 | for (queue = 0; queue < hw->queues; queue++) { | |
507 | if (arg->count < arg->skip) { | |
508 | arg->count++; | |
509 | continue; | |
510 | } | |
511 | /* we should return classids for our internal queues here | |
512 | * as well as the external ones */ | |
513 | if (arg->fn(qd, queue+1, arg) < 0) { | |
514 | arg->stop = 1; | |
515 | break; | |
516 | } | |
517 | arg->count++; | |
518 | } | |
519 | } | |
520 | ||
521 | ||
522 | static struct tcf_proto ** wme_classop_find_tcf(struct Qdisc *qd, | |
523 | unsigned long cl) | |
524 | { | |
525 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
526 | ||
527 | if (cl) | |
528 | return NULL; | |
529 | ||
530 | return &q->filter_list; | |
531 | } | |
532 | ||
533 | ||
534 | /* this qdisc is classful (i.e. has classes, some of which may have leaf qdiscs attached) | |
535 | * - these are the operations on the classes */ | |
536 | static struct Qdisc_class_ops class_ops = | |
537 | { | |
538 | .graft = wme_classop_graft, | |
539 | .leaf = wme_classop_leaf, | |
540 | ||
541 | .get = wme_classop_get, | |
542 | .put = wme_classop_put, | |
543 | .change = wme_classop_change, | |
544 | .delete = wme_classop_delete, | |
545 | .walk = wme_classop_walk, | |
546 | ||
547 | .tcf_chain = wme_classop_find_tcf, | |
548 | .bind_tcf = wme_classop_bind, | |
549 | .unbind_tcf = wme_classop_put, | |
550 | ||
551 | .dump = wme_classop_dump_class, | |
552 | }; | |
553 | ||
554 | ||
555 | /* queueing discipline operations */ | |
556 | static struct Qdisc_ops wme_qdisc_ops = | |
557 | { | |
558 | .next = NULL, | |
559 | .cl_ops = &class_ops, | |
560 | .id = "ieee80211", | |
561 | .priv_size = sizeof(struct ieee80211_sched_data), | |
562 | ||
563 | .enqueue = wme_qdiscop_enqueue, | |
564 | .dequeue = wme_qdiscop_dequeue, | |
565 | .requeue = wme_qdiscop_requeue, | |
566 | .drop = NULL, /* drop not needed since we are always the root qdisc */ | |
567 | ||
568 | .init = wme_qdiscop_init, | |
569 | .reset = wme_qdiscop_reset, | |
570 | .destroy = wme_qdiscop_destroy, | |
571 | .change = wme_qdiscop_tune, | |
572 | ||
573 | .dump = wme_qdiscop_dump, | |
574 | }; | |
575 | ||
576 | ||
577 | void ieee80211_install_qdisc(struct net_device *dev) | |
578 | { | |
579 | struct Qdisc *qdisc; | |
580 | ||
581 | qdisc = qdisc_create_dflt(dev, &wme_qdisc_ops, TC_H_ROOT); | |
582 | if (!qdisc) { | |
583 | printk(KERN_ERR "%s: qdisc installation failed\n", dev->name); | |
584 | return; | |
585 | } | |
586 | ||
587 | /* same handle as would be allocated by qdisc_alloc_handle() */ | |
588 | qdisc->handle = 0x80010000; | |
589 | ||
590 | qdisc_lock_tree(dev); | |
591 | list_add_tail(&qdisc->list, &dev->qdisc_list); | |
592 | dev->qdisc_sleeping = qdisc; | |
593 | qdisc_unlock_tree(dev); | |
594 | } | |
595 | ||
596 | ||
597 | int ieee80211_qdisc_installed(struct net_device *dev) | |
598 | { | |
599 | return dev->qdisc_sleeping->ops == &wme_qdisc_ops; | |
600 | } | |
601 | ||
602 | ||
603 | int ieee80211_wme_register(void) | |
604 | { | |
605 | return register_qdisc(&wme_qdisc_ops); | |
606 | } | |
607 | ||
608 | ||
609 | void ieee80211_wme_unregister(void) | |
610 | { | |
611 | unregister_qdisc(&wme_qdisc_ops); | |
612 | } |