summaryrefslogtreecommitdiff
path: root/net/sched/sch_mqprio.c
blob: 4d5ed45123f033d865f56f0217dde763fff136bb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
/*
 * net/sched/sch_mqprio.c
 *
 * Copyright (c) 2010 John Fastabend <john.r.fastabend@intel.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 */

#include <linux/types.h>
#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/skbuff.h>
#include <linux/module.h>
#include <net/netlink.h>
#include <net/pkt_sched.h>
#include <net/sch_generic.h>
#include <net/pkt_cls.h>

struct mqprio_sched {
	struct Qdisc		**qdiscs;
	u16 mode;
	u16 shaper;
	int hw_offload;
	u32 flags;
	u64 min_rate[TC_QOPT_MAX_QUEUE];
	u64 max_rate[TC_QOPT_MAX_QUEUE];
};

static void mqprio_destroy(struct Qdisc *sch)
{
	struct net_device *dev = qdisc_dev(sch);
	struct mqprio_sched *priv = qdisc_priv(sch);
	unsigned int ntx;

	if (priv->qdiscs) {
		for (ntx = 0;
		     ntx < dev->num_tx_queues && priv->qdiscs[ntx];
		     ntx++)
			qdisc_destroy(priv->qdiscs[ntx]);
		kfree(priv->qdiscs);
	}

	if (priv->hw_offload && dev->netdev_ops->ndo_setup_tc) {
		struct tc_mqprio_qopt_offload mqprio = { { 0 } };

		switch (priv->mode) {
		case TC_MQPRIO_MODE_DCB:
		case TC_MQPRIO_MODE_CHANNEL:
			dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_MQPRIO,
						      &mqprio);
			break;
		default:
			return;
		}
	} else {
		netdev_set_num_tc(dev, 0);
	}
}

static int mqprio_parse_opt(struct net_device *dev, struct tc_mqprio_qopt *qopt)
{
	int i, j;

	/* Verify num_tc is not out of max range */
	if (qopt->num_tc > TC_MAX_QUEUE)
		return -EINVAL;

	/* Verify priority mapping uses valid tcs */
	for (i = 0; i < TC_BITMASK + 1; i++) {
		if (qopt->prio_tc_map[i] >= qopt->num_tc)
			return -EINVAL;
	}

	/* Limit qopt->hw to maximum supported offload value.  Drivers have
	 * the option of overriding this later if they don't support the a
	 * given offload type.
	 */
	if (qopt->hw > TC_MQPRIO_HW_OFFLOAD_MAX)
		qopt->hw = TC_MQPRIO_HW_OFFLOAD_MAX;

	/* If hardware offload is requested we will leave it to the device
	 * to either populate the queue counts itself or to validate the
	 * provided queue counts.  If ndo_setup_tc is not present then
	 * hardware doesn't support offload and we should return an error.
	 */
	if (qopt->hw)
		return dev->netdev_ops->ndo_setup_tc ? 0 : -EINVAL;

	for (i = 0; i < qopt->num_tc; i++) {
		unsigned int last = qopt->offset[i] + qopt->count[i];

		/* Verify the queue count is in tx range being equal to the
		 * real_num_tx_queues indicates the last queue is in use.
		 */
		if (qopt->offset[i] >= dev->real_num_tx_queues ||
		    !qopt->count[i] ||
		    last > dev->real_num_tx_queues)
			return -EINVAL;

		/* Verify that the offset and counts do not overlap */
		for (j = i + 1; j < qopt->num_tc; j++) {
			if (last > qopt->offset[j])
				return -EINVAL;
		}
	}

	return 0;
}

static const struct nla_policy mqprio_policy[TCA_MQPRIO_MAX + 1] = {
	[TCA_MQPRIO_MODE]	= { .len = sizeof(u16) },
	[TCA_MQPRIO_SHAPER]	= { .len = sizeof(u16) },
	[TCA_MQPRIO_MIN_RATE64]	= { .type = NLA_NESTED },
	[TCA_MQPRIO_MAX_RATE64]	= { .type = NLA_NESTED },
};

static int parse_attr(struct nlattr *tb[], int maxtype, struct nlattr *nla,
		      const struct nla_policy *policy, int len)
{
	int nested_len = nla_len(nla) - NLA_ALIGN(len);

	if (nested_len >= nla_attr_size(0))
		return nla_parse(tb, maxtype, nla_data(nla) + NLA_ALIGN(len),
				 nested_len, policy, NULL);

	memset(tb, 0, sizeof(struct nlattr *) * (maxtype + 1));
	return 0;
}

static int mqprio_init(struct Qdisc *sch, struct nlattr *opt)
{
	struct net_device *dev = qdisc_dev(sch);
	struct mqprio_sched *priv = qdisc_priv(sch);
	struct netdev_queue *dev_queue;
	struct Qdisc *qdisc;
	int i, err = -EOPNOTSUPP;
	struct tc_mqprio_qopt *qopt = NULL;
	struct nlattr *tb[TCA_MQPRIO_MAX + 1];
	struct nlattr *attr;
	int rem;
	int len;

	BUILD_BUG_ON(TC_MAX_QUEUE != TC_QOPT_MAX_QUEUE);
	BUILD_BUG_ON(TC_BITMASK != TC_QOPT_BITMASK);

	if (sch->parent != TC_H_ROOT)
		return -EOPNOTSUPP;

	if (!netif_is_multiqueue(dev))
		return -EOPNOTSUPP;

	/* make certain can allocate enough classids to handle queues */
	if (dev->num_tx_queues >= TC_H_MIN_PRIORITY)
		return -ENOMEM;

	if (!opt || nla_len(opt) < sizeof(*qopt))
		return -EINVAL;

	qopt = nla_data(opt);
	if (mqprio_parse_opt(dev, qopt))
		return -EINVAL;

	len = nla_len(opt) - NLA_ALIGN(sizeof(*qopt));
	if (len > 0) {
		err = parse_attr(tb, TCA_MQPRIO_MAX, opt, mqprio_policy,
				 sizeof(*qopt));
		if (err < 0)
			return err;

		if (!qopt->hw)
			return -EINVAL;

		if (tb[TCA_MQPRIO_MODE]) {
			priv->flags |= TC_MQPRIO_F_MODE;
			priv->mode = *(u16 *)nla_data(tb[TCA_MQPRIO_MODE]);
		}

		if (tb[TCA_MQPRIO_SHAPER]) {
			priv->flags |= TC_MQPRIO_F_SHAPER;
			priv->shaper = *(u16 *)nla_data(tb[TCA_MQPRIO_SHAPER]);
		}

		if (tb[TCA_MQPRIO_MIN_RATE64]) {
			if (priv->shaper != TC_MQPRIO_SHAPER_BW_RATE)
				return -EINVAL;
			i = 0;
			nla_for_each_nested(attr, tb[TCA_MQPRIO_MIN_RATE64],
					    rem) {
				if (nla_type(attr) != TCA_MQPRIO_MIN_RATE64)
					return -EINVAL;
				if (i >= qopt->num_tc)
					break;
				priv->min_rate[i] = *(u64 *)nla_data(attr);
				i++;
			}
			priv->flags |= TC_MQPRIO_F_MIN_RATE;
		}

		if (tb[TCA_MQPRIO_MAX_RATE64]) {
			if (priv->shaper != TC_MQPRIO_SHAPER_BW_RATE)
				return -EINVAL;
			i = 0;
			nla_for_each_nested(attr, tb[TCA_MQPRIO_MAX_RATE64],
					    rem) {
				if (nla_type(attr) != TCA_MQPRIO_MAX_RATE64)
					return -EINVAL;
				if (i >= qopt->num_tc)
					break;
				priv->max_rate[i] = *(u64 *)nla_data(attr);
				i++;
			}
			priv->flags |= TC_MQPRIO_F_MAX_RATE;
		}
	}

	/* pre-allocate qdisc, attachment can't fail */
	priv->qdiscs = kcalloc(dev->num_tx_queues, sizeof(priv->qdiscs[0]),
			       GFP_KERNEL);
	if (!priv->qdiscs)
		return -ENOMEM;

	for (i = 0; i < dev->num_tx_queues; i++) {
		dev_queue = netdev_get_tx_queue(dev, i);
		qdisc = qdisc_create_dflt(dev_queue,
					  get_default_qdisc_ops(dev, i),
					  TC_H_MAKE(TC_H_MAJ(sch->handle),
						    TC_H_MIN(i + 1)));
		if (!qdisc)
			return -ENOMEM;

		priv->qdiscs[i] = qdisc;
		qdisc->flags |= TCQ_F_ONETXQUEUE | TCQ_F_NOPARENT;
	}

	/* If the mqprio options indicate that hardware should own
	 * the queue mapping then run ndo_setup_tc otherwise use the
	 * supplied and verified mapping
	 */
	if (qopt->hw) {
		struct tc_mqprio_qopt_offload mqprio = {.qopt = *qopt};

		switch (priv->mode) {
		case TC_MQPRIO_MODE_DCB:
			if (priv->shaper != TC_MQPRIO_SHAPER_DCB)
				return -EINVAL;
			break;
		case TC_MQPRIO_MODE_CHANNEL:
			mqprio.flags = priv->flags;
			if (priv->flags & TC_MQPRIO_F_MODE)
				mqprio.mode = priv->mode;
			if (priv->flags & TC_MQPRIO_F_SHAPER)
				mqprio.shaper = priv->shaper;
			if (priv->flags & TC_MQPRIO_F_MIN_RATE)
				for (i = 0; i < mqprio.qopt.num_tc; i++)
					mqprio.min_rate[i] = priv->min_rate[i];
			if (priv->flags & TC_MQPRIO_F_MAX_RATE)
				for (i = 0; i < mqprio.qopt.num_tc; i++)
					mqprio.max_rate[i] = priv->max_rate[i];
			break;
		default:
			return -EINVAL;
		}
		err = dev->netdev_ops->ndo_setup_tc(dev,
						    TC_SETUP_MQPRIO,
						    &mqprio);
		if (err)
			return err;

		priv->hw_offload = mqprio.qopt.hw;
	} else {
		netdev_set_num_tc(dev, qopt->num_tc);
		for (i = 0; i < qopt->num_tc; i++)
			netdev_set_tc_queue(dev, i,
					    qopt->count[i], qopt->offset[i]);
	}

	/* Always use supplied priority mappings */
	for (i = 0; i < TC_BITMASK + 1; i++)
		netdev_set_prio_tc_map(dev, i, qopt->prio_tc_map[i]);

	sch->flags |= TCQ_F_MQROOT;
	return 0;
}

static void mqprio_attach(struct Qdisc *sch)
{
	struct net_device *dev = qdisc_dev(sch);
	struct mqprio_sched *priv = qdisc_priv(sch);
	struct Qdisc *qdisc, *old;
	unsigned int ntx;

	/* Attach underlying qdisc */
	for (ntx = 0; ntx < dev->num_tx_queues; ntx++) {
		qdisc = priv->qdiscs[ntx];
		old = dev_graft_qdisc(qdisc->dev_queue, qdisc);
		if (old)
			qdisc_destroy(old);
		if (ntx < dev->real_num_tx_queues)
			qdisc_hash_add(qdisc, false);
	}
	kfree(priv->qdiscs);
	priv->qdiscs = NULL;
}

static struct netdev_queue *mqprio_queue_get(struct Qdisc *sch,
					     unsigned long cl)
{
	struct net_device *dev = qdisc_dev(sch);
	unsigned long ntx = cl - 1;

	if (ntx >= dev->num_tx_queues)
		return NULL;
	return netdev_get_tx_queue(dev, ntx);
}

static int mqprio_graft(struct Qdisc *sch, unsigned long cl, struct Qdisc *new,
		    struct Qdisc **old)
{
	struct net_device *dev = qdisc_dev(sch);
	struct netdev_queue *dev_queue = mqprio_queue_get(sch, cl);

	if (!dev_queue)
		return -EINVAL;

	if (dev->flags & IFF_UP)
		dev_deactivate(dev);

	*old = dev_graft_qdisc(dev_queue, new);

	if (new)
		new->flags |= TCQ_F_ONETXQUEUE | TCQ_F_NOPARENT;

	if (dev->flags & IFF_UP)
		dev_activate(dev);

	return 0;
}

static int dump_rates(struct mqprio_sched *priv,
		      struct tc_mqprio_qopt *opt, struct sk_buff *skb)
{
	struct nlattr *nest;
	int i;

	if (priv->flags & TC_MQPRIO_F_MIN_RATE) {
		nest = nla_nest_start(skb, TCA_MQPRIO_MIN_RATE64);
		if (!nest)
			goto nla_put_failure;

		for (i = 0; i < opt->num_tc; i++) {
			if (nla_put(skb, TCA_MQPRIO_MIN_RATE64,
				    sizeof(priv->min_rate[i]),
				    &priv->min_rate[i]))
				goto nla_put_failure;
		}
		nla_nest_end(skb, nest);
	}

	if (priv->flags & TC_MQPRIO_F_MAX_RATE) {
		nest = nla_nest_start(skb, TCA_MQPRIO_MAX_RATE64);
		if (!nest)
			goto nla_put_failure;

		for (i = 0; i < opt->num_tc; i++) {
			if (nla_put(skb, TCA_MQPRIO_MAX_RATE64,
				    sizeof(priv->max_rate[i]),
				    &priv->max_rate[i]))
				goto nla_put_failure;
		}
		nla_nest_end(skb, nest);
	}
	return 0;

nla_put_failure:
	nla_nest_cancel(skb, nest);
	return -1;
}

static int mqprio_dump(struct Qdisc *sch, struct sk_buff *skb)
{
	struct net_device *dev = qdisc_dev(sch);
	struct mqprio_sched *priv = qdisc_priv(sch);
	struct nlattr *nla = (struct nlattr *)skb_tail_pointer(skb);
	struct tc_mqprio_qopt opt = { 0 };
	struct Qdisc *qdisc;
	unsigned int i;

	sch->q.qlen = 0;
	memset(&sch->bstats, 0, sizeof(sch->bstats));
	memset(&sch->qstats, 0, sizeof(sch->qstats));

	for (i = 0; i < dev->num_tx_queues; i++) {
		qdisc = rtnl_dereference(netdev_get_tx_queue(dev, i)->qdisc);
		spin_lock_bh(qdisc_lock(qdisc));
		sch->q.qlen		+= qdisc->q.qlen;
		sch->bstats.bytes	+= qdisc->bstats.bytes;
		sch->bstats.packets	+= qdisc->bstats.packets;
		sch->qstats.backlog	+= qdisc->qstats.backlog;
		sch->qstats.drops	+= qdisc->qstats.drops;
		sch->qstats.requeues	+= qdisc->qstats.requeues;
		sch->qstats.overlimits	+= qdisc->qstats.overlimits;
		spin_unlock_bh(qdisc_lock(qdisc));
	}

	opt.num_tc = netdev_get_num_tc(dev);
	memcpy(opt.prio_tc_map, dev->prio_tc_map, sizeof(opt.prio_tc_map));
	opt.hw = priv->hw_offload;

	for (i = 0; i < netdev_get_num_tc(dev); i++) {
		opt.count[i] = dev->tc_to_txq[i].count;
		opt.offset[i] = dev->tc_to_txq[i].offset;
	}

	if (nla_put(skb, TCA_OPTIONS, NLA_ALIGN(sizeof(opt)), &opt))
		goto nla_put_failure;

	if ((priv->flags & TC_MQPRIO_F_MODE) &&
	    nla_put_u16(skb, TCA_MQPRIO_MODE, priv->mode))
		goto nla_put_failure;

	if ((priv->flags & TC_MQPRIO_F_SHAPER) &&
	    nla_put_u16(skb, TCA_MQPRIO_SHAPER, priv->shaper))
		goto nla_put_failure;

	if ((priv->flags & TC_MQPRIO_F_MIN_RATE ||
	     priv->flags & TC_MQPRIO_F_MAX_RATE) &&
	    (dump_rates(priv, &opt, skb) != 0))
		goto nla_put_failure;

	return nla_nest_end(skb, nla);
nla_put_failure:
	nlmsg_trim(skb, nla);
	return -1;
}

static struct Qdisc *mqprio_leaf(struct Qdisc *sch, unsigned long cl)
{
	struct netdev_queue *dev_queue = mqprio_queue_get(sch, cl);

	if (!dev_queue)
		return NULL;

	return dev_queue->qdisc_sleeping;
}

static unsigned long mqprio_find(struct Qdisc *sch, u32 classid)
{
	struct net_device *dev = qdisc_dev(sch);
	unsigned int ntx = TC_H_MIN(classid);

	/* There are essentially two regions here that have valid classid
	 * values. The first region will have a classid value of 1 through
	 * num_tx_queues. All of these are backed by actual Qdiscs.
	 */
	if (ntx < TC_H_MIN_PRIORITY)
		return (ntx <= dev->num_tx_queues) ? ntx : 0;

	/* The second region represents the hardware traffic classes. These
	 * are represented by classid values of TC_H_MIN_PRIORITY through
	 * TC_H_MIN_PRIORITY + netdev_get_num_tc - 1
	 */
	return ((ntx - TC_H_MIN_PRIORITY) < netdev_get_num_tc(dev)) ? ntx : 0;
}

static int mqprio_dump_class(struct Qdisc *sch, unsigned long cl,
			 struct sk_buff *skb, struct tcmsg *tcm)
{
	if (cl < TC_H_MIN_PRIORITY) {
		struct netdev_queue *dev_queue = mqprio_queue_get(sch, cl);
		struct net_device *dev = qdisc_dev(sch);
		int tc = netdev_txq_to_tc(dev, cl - 1);

		tcm->tcm_parent = (tc < 0) ? 0 :
			TC_H_MAKE(TC_H_MAJ(sch->handle),
				  TC_H_MIN(tc + TC_H_MIN_PRIORITY));
		tcm->tcm_info = dev_queue->qdisc_sleeping->handle;
	} else {
		tcm->tcm_parent = TC_H_ROOT;
		tcm->tcm_info = 0;
	}
	tcm->tcm_handle |= TC_H_MIN(cl);
	return 0;
}

static int mqprio_dump_class_stats(struct Qdisc *sch, unsigned long cl,
				   struct gnet_dump *d)
	__releases(d->lock)
	__acquires(d->lock)
{
	if (cl >= TC_H_MIN_PRIORITY) {
		int i;
		__u32 qlen = 0;
		struct Qdisc *qdisc;
		struct gnet_stats_queue qstats = {0};
		struct gnet_stats_basic_packed bstats = {0};
		struct net_device *dev = qdisc_dev(sch);
		struct netdev_tc_txq tc = dev->tc_to_txq[cl & TC_BITMASK];

		/* Drop lock here it will be reclaimed before touching
		 * statistics this is required because the d->lock we
		 * hold here is the look on dev_queue->qdisc_sleeping
		 * also acquired below.
		 */
		if (d->lock)
			spin_unlock_bh(d->lock);

		for (i = tc.offset; i < tc.offset + tc.count; i++) {
			struct netdev_queue *q = netdev_get_tx_queue(dev, i);

			qdisc = rtnl_dereference(q->qdisc);
			spin_lock_bh(qdisc_lock(qdisc));
			qlen		  += qdisc->q.qlen;
			bstats.bytes      += qdisc->bstats.bytes;
			bstats.packets    += qdisc->bstats.packets;
			qstats.backlog    += qdisc->qstats.backlog;
			qstats.drops      += qdisc->qstats.drops;
			qstats.requeues   += qdisc->qstats.requeues;
			qstats.overlimits += qdisc->qstats.overlimits;
			spin_unlock_bh(qdisc_lock(qdisc));
		}
		/* Reclaim root sleeping lock before completing stats */
		if (d->lock)
			spin_lock_bh(d->lock);
		if (gnet_stats_copy_basic(NULL, d, NULL, &bstats) < 0 ||
		    gnet_stats_copy_queue(d, NULL, &qstats, qlen) < 0)
			return -1;
	} else {
		struct netdev_queue *dev_queue = mqprio_queue_get(sch, cl);

		sch = dev_queue->qdisc_sleeping;
		if (gnet_stats_copy_basic(qdisc_root_sleeping_running(sch),
					  d, NULL, &sch->bstats) < 0 ||
		    gnet_stats_copy_queue(d, NULL,
					  &sch->qstats, sch->q.qlen) < 0)
			return -1;
	}
	return 0;
}

static void mqprio_walk(struct Qdisc *sch, struct qdisc_walker *arg)
{
	struct net_device *dev = qdisc_dev(sch);
	unsigned long ntx;

	if (arg->stop)
		return;

	/* Walk hierarchy with a virtual class per tc */
	arg->count = arg->skip;
	for (ntx = arg->skip; ntx < netdev_get_num_tc(dev); ntx++) {
		if (arg->fn(sch, ntx + TC_H_MIN_PRIORITY, arg) < 0) {
			arg->stop = 1;
			return;
		}
		arg->count++;
	}

	/* Pad the values and skip over unused traffic classes */
	if (ntx < TC_MAX_QUEUE) {
		arg->count = TC_MAX_QUEUE;
		ntx = TC_MAX_QUEUE;
	}

	/* Reset offset, sort out remaining per-queue qdiscs */
	for (ntx -= TC_MAX_QUEUE; ntx < dev->num_tx_queues; ntx++) {
		if (arg->fn(sch, ntx + 1, arg) < 0) {
			arg->stop = 1;
			return;
		}
		arg->count++;
	}
}

static struct netdev_queue *mqprio_select_queue(struct Qdisc *sch,
						struct tcmsg *tcm)
{
	return mqprio_queue_get(sch, TC_H_MIN(tcm->tcm_parent));
}

static const struct Qdisc_class_ops mqprio_class_ops = {
	.graft		= mqprio_graft,
	.leaf		= mqprio_leaf,
	.find		= mqprio_find,
	.walk		= mqprio_walk,
	.dump		= mqprio_dump_class,
	.dump_stats	= mqprio_dump_class_stats,
	.select_queue	= mqprio_select_queue,
};

static struct Qdisc_ops mqprio_qdisc_ops __read_mostly = {
	.cl_ops		= &mqprio_class_ops,
	.id		= "mqprio",
	.priv_size	= sizeof(struct mqprio_sched),
	.init		= mqprio_init,
	.destroy	= mqprio_destroy,
	.attach		= mqprio_attach,
	.dump		= mqprio_dump,
	.owner		= THIS_MODULE,
};

static int __init mqprio_module_init(void)
{
	return register_qdisc(&mqprio_qdisc_ops);
}

static void __exit mqprio_module_exit(void)
{
	unregister_qdisc(&mqprio_qdisc_ops);
}

module_init(mqprio_module_init);
module_exit(mqprio_module_exit);

MODULE_LICENSE("GPL");