Commit | Line | Data |
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1da177e4 LT |
1 | /* net/sched/sch_teql.c "True" (or "trivial") link equalizer. |
2 | * | |
3 | * This program is free software; you can redistribute it and/or | |
4 | * modify it under the terms of the GNU General Public License | |
5 | * as published by the Free Software Foundation; either version | |
6 | * 2 of the License, or (at your option) any later version. | |
7 | * | |
8 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> | |
9 | */ | |
10 | ||
11 | #include <linux/module.h> | |
1da177e4 LT |
12 | #include <linux/types.h> |
13 | #include <linux/kernel.h> | |
5a0e3ad6 | 14 | #include <linux/slab.h> |
1da177e4 | 15 | #include <linux/string.h> |
1da177e4 | 16 | #include <linux/errno.h> |
14c85021 | 17 | #include <linux/if_arp.h> |
1da177e4 | 18 | #include <linux/netdevice.h> |
1da177e4 | 19 | #include <linux/init.h> |
1da177e4 LT |
20 | #include <linux/skbuff.h> |
21 | #include <linux/moduleparam.h> | |
0ba48053 PM |
22 | #include <net/dst.h> |
23 | #include <net/neighbour.h> | |
1da177e4 LT |
24 | #include <net/pkt_sched.h> |
25 | ||
26 | /* | |
27 | How to setup it. | |
28 | ---------------- | |
29 | ||
30 | After loading this module you will find a new device teqlN | |
31 | and new qdisc with the same name. To join a slave to the equalizer | |
32 | you should just set this qdisc on a device f.e. | |
33 | ||
34 | # tc qdisc add dev eth0 root teql0 | |
35 | # tc qdisc add dev eth1 root teql0 | |
36 | ||
37 | That's all. Full PnP 8) | |
38 | ||
39 | Applicability. | |
40 | -------------- | |
41 | ||
42 | 1. Slave devices MUST be active devices, i.e., they must raise the tbusy | |
43 | signal and generate EOI events. If you want to equalize virtual devices | |
44 | like tunnels, use a normal eql device. | |
45 | 2. This device puts no limitations on physical slave characteristics | |
46 | f.e. it will equalize 9600baud line and 100Mb ethernet perfectly :-) | |
47 | Certainly, large difference in link speeds will make the resulting | |
48 | eqalized link unusable, because of huge packet reordering. | |
49 | I estimate an upper useful difference as ~10 times. | |
50 | 3. If the slave requires address resolution, only protocols using | |
51 | neighbour cache (IPv4/IPv6) will work over the equalized link. | |
52 | Other protocols are still allowed to use the slave device directly, | |
53 | which will not break load balancing, though native slave | |
54 | traffic will have the highest priority. */ | |
55 | ||
cc7ec456 | 56 | struct teql_master { |
1da177e4 LT |
57 | struct Qdisc_ops qops; |
58 | struct net_device *dev; | |
59 | struct Qdisc *slaves; | |
60 | struct list_head master_list; | |
1ac9ad13 ED |
61 | unsigned long tx_bytes; |
62 | unsigned long tx_packets; | |
63 | unsigned long tx_errors; | |
64 | unsigned long tx_dropped; | |
1da177e4 LT |
65 | }; |
66 | ||
cc7ec456 | 67 | struct teql_sched_data { |
1da177e4 LT |
68 | struct Qdisc *next; |
69 | struct teql_master *m; | |
70 | struct neighbour *ncache; | |
71 | struct sk_buff_head q; | |
72 | }; | |
73 | ||
cc7ec456 | 74 | #define NEXT_SLAVE(q) (((struct teql_sched_data *)qdisc_priv(q))->next) |
1da177e4 | 75 | |
cc7ec456 | 76 | #define FMASK (IFF_BROADCAST | IFF_POINTOPOINT) |
1da177e4 LT |
77 | |
78 | /* "teql*" qdisc routines */ | |
79 | ||
80 | static int | |
cc7ec456 | 81 | teql_enqueue(struct sk_buff *skb, struct Qdisc *sch) |
1da177e4 | 82 | { |
5ce2d488 | 83 | struct net_device *dev = qdisc_dev(sch); |
1da177e4 LT |
84 | struct teql_sched_data *q = qdisc_priv(sch); |
85 | ||
4cd8c9e8 KK |
86 | if (q->q.qlen < dev->tx_queue_len) { |
87 | __skb_queue_tail(&q->q, skb); | |
9871e50e | 88 | return NET_XMIT_SUCCESS; |
1da177e4 LT |
89 | } |
90 | ||
1da177e4 LT |
91 | kfree_skb(skb); |
92 | sch->qstats.drops++; | |
93 | return NET_XMIT_DROP; | |
94 | } | |
95 | ||
1da177e4 | 96 | static struct sk_buff * |
cc7ec456 | 97 | teql_dequeue(struct Qdisc *sch) |
1da177e4 LT |
98 | { |
99 | struct teql_sched_data *dat = qdisc_priv(sch); | |
b0e1e646 | 100 | struct netdev_queue *dat_queue; |
1da177e4 LT |
101 | struct sk_buff *skb; |
102 | ||
103 | skb = __skb_dequeue(&dat->q); | |
e8a0464c | 104 | dat_queue = netdev_get_tx_queue(dat->m->dev, 0); |
1da177e4 | 105 | if (skb == NULL) { |
b0e1e646 | 106 | struct net_device *m = qdisc_dev(dat_queue->qdisc); |
1da177e4 LT |
107 | if (m) { |
108 | dat->m->slaves = sch; | |
109 | netif_wake_queue(m); | |
110 | } | |
9190b3b3 ED |
111 | } else { |
112 | qdisc_bstats_update(sch, skb); | |
1da177e4 | 113 | } |
b0e1e646 | 114 | sch->q.qlen = dat->q.qlen + dat_queue->qdisc->q.qlen; |
1da177e4 LT |
115 | return skb; |
116 | } | |
117 | ||
8e3af978 | 118 | static struct sk_buff * |
cc7ec456 | 119 | teql_peek(struct Qdisc *sch) |
8e3af978 JP |
120 | { |
121 | /* teql is meant to be used as root qdisc */ | |
122 | return NULL; | |
123 | } | |
124 | ||
cc7ec456 | 125 | static inline void |
1da177e4 LT |
126 | teql_neigh_release(struct neighbour *n) |
127 | { | |
128 | if (n) | |
129 | neigh_release(n); | |
130 | } | |
131 | ||
132 | static void | |
cc7ec456 | 133 | teql_reset(struct Qdisc *sch) |
1da177e4 LT |
134 | { |
135 | struct teql_sched_data *dat = qdisc_priv(sch); | |
136 | ||
137 | skb_queue_purge(&dat->q); | |
138 | sch->q.qlen = 0; | |
139 | teql_neigh_release(xchg(&dat->ncache, NULL)); | |
140 | } | |
141 | ||
142 | static void | |
cc7ec456 | 143 | teql_destroy(struct Qdisc *sch) |
1da177e4 LT |
144 | { |
145 | struct Qdisc *q, *prev; | |
146 | struct teql_sched_data *dat = qdisc_priv(sch); | |
147 | struct teql_master *master = dat->m; | |
148 | ||
cc7ec456 ED |
149 | prev = master->slaves; |
150 | if (prev) { | |
1da177e4 LT |
151 | do { |
152 | q = NEXT_SLAVE(prev); | |
153 | if (q == sch) { | |
154 | NEXT_SLAVE(prev) = NEXT_SLAVE(q); | |
155 | if (q == master->slaves) { | |
156 | master->slaves = NEXT_SLAVE(q); | |
157 | if (q == master->slaves) { | |
e8a0464c | 158 | struct netdev_queue *txq; |
83874000 | 159 | spinlock_t *root_lock; |
e8a0464c DM |
160 | |
161 | txq = netdev_get_tx_queue(master->dev, 0); | |
1da177e4 | 162 | master->slaves = NULL; |
83874000 | 163 | |
102396ae | 164 | root_lock = qdisc_root_sleeping_lock(txq->qdisc); |
83874000 | 165 | spin_lock_bh(root_lock); |
e8a0464c | 166 | qdisc_reset(txq->qdisc); |
83874000 | 167 | spin_unlock_bh(root_lock); |
1da177e4 LT |
168 | } |
169 | } | |
170 | skb_queue_purge(&dat->q); | |
171 | teql_neigh_release(xchg(&dat->ncache, NULL)); | |
172 | break; | |
173 | } | |
10297b99 | 174 | |
1da177e4 LT |
175 | } while ((prev = q) != master->slaves); |
176 | } | |
177 | } | |
178 | ||
1e90474c | 179 | static int teql_qdisc_init(struct Qdisc *sch, struct nlattr *opt) |
1da177e4 | 180 | { |
5ce2d488 | 181 | struct net_device *dev = qdisc_dev(sch); |
cc7ec456 | 182 | struct teql_master *m = (struct teql_master *)sch->ops; |
1da177e4 LT |
183 | struct teql_sched_data *q = qdisc_priv(sch); |
184 | ||
185 | if (dev->hard_header_len > m->dev->hard_header_len) | |
186 | return -EINVAL; | |
187 | ||
188 | if (m->dev == dev) | |
189 | return -ELOOP; | |
190 | ||
191 | q->m = m; | |
192 | ||
193 | skb_queue_head_init(&q->q); | |
194 | ||
195 | if (m->slaves) { | |
196 | if (m->dev->flags & IFF_UP) { | |
f64f9e71 JP |
197 | if ((m->dev->flags & IFF_POINTOPOINT && |
198 | !(dev->flags & IFF_POINTOPOINT)) || | |
199 | (m->dev->flags & IFF_BROADCAST && | |
200 | !(dev->flags & IFF_BROADCAST)) || | |
201 | (m->dev->flags & IFF_MULTICAST && | |
202 | !(dev->flags & IFF_MULTICAST)) || | |
203 | dev->mtu < m->dev->mtu) | |
1da177e4 LT |
204 | return -EINVAL; |
205 | } else { | |
206 | if (!(dev->flags&IFF_POINTOPOINT)) | |
207 | m->dev->flags &= ~IFF_POINTOPOINT; | |
208 | if (!(dev->flags&IFF_BROADCAST)) | |
209 | m->dev->flags &= ~IFF_BROADCAST; | |
210 | if (!(dev->flags&IFF_MULTICAST)) | |
211 | m->dev->flags &= ~IFF_MULTICAST; | |
212 | if (dev->mtu < m->dev->mtu) | |
213 | m->dev->mtu = dev->mtu; | |
214 | } | |
215 | q->next = NEXT_SLAVE(m->slaves); | |
216 | NEXT_SLAVE(m->slaves) = sch; | |
217 | } else { | |
218 | q->next = sch; | |
219 | m->slaves = sch; | |
220 | m->dev->mtu = dev->mtu; | |
221 | m->dev->flags = (m->dev->flags&~FMASK)|(dev->flags&FMASK); | |
222 | } | |
223 | return 0; | |
224 | } | |
225 | ||
1da177e4 LT |
226 | |
227 | static int | |
228 | __teql_resolve(struct sk_buff *skb, struct sk_buff *skb_res, struct net_device *dev) | |
229 | { | |
e8a0464c DM |
230 | struct netdev_queue *dev_queue = netdev_get_tx_queue(dev, 0); |
231 | struct teql_sched_data *q = qdisc_priv(dev_queue->qdisc); | |
69cce1d1 | 232 | struct neighbour *mn = dst_get_neighbour(skb_dst(skb)); |
1da177e4 LT |
233 | struct neighbour *n = q->ncache; |
234 | ||
235 | if (mn->tbl == NULL) | |
236 | return -EINVAL; | |
237 | if (n && n->tbl == mn->tbl && | |
238 | memcmp(n->primary_key, mn->primary_key, mn->tbl->key_len) == 0) { | |
239 | atomic_inc(&n->refcnt); | |
240 | } else { | |
241 | n = __neigh_lookup_errno(mn->tbl, mn->primary_key, dev); | |
242 | if (IS_ERR(n)) | |
243 | return PTR_ERR(n); | |
244 | } | |
245 | if (neigh_event_send(n, skb_res) == 0) { | |
246 | int err; | |
0ed8ddf4 | 247 | char haddr[MAX_ADDR_LEN]; |
0c4e8581 | 248 | |
0ed8ddf4 ED |
249 | neigh_ha_snapshot(haddr, n, dev); |
250 | err = dev_hard_header(skb, dev, ntohs(skb->protocol), haddr, | |
251 | NULL, skb->len); | |
0c4e8581 | 252 | |
1da177e4 LT |
253 | if (err < 0) { |
254 | neigh_release(n); | |
255 | return -EINVAL; | |
256 | } | |
257 | teql_neigh_release(xchg(&q->ncache, n)); | |
258 | return 0; | |
259 | } | |
260 | neigh_release(n); | |
261 | return (skb_res == NULL) ? -EAGAIN : 1; | |
262 | } | |
263 | ||
3b04ddde SH |
264 | static inline int teql_resolve(struct sk_buff *skb, |
265 | struct sk_buff *skb_res, struct net_device *dev) | |
1da177e4 | 266 | { |
e8a0464c DM |
267 | struct netdev_queue *txq = netdev_get_tx_queue(dev, 0); |
268 | if (txq->qdisc == &noop_qdisc) | |
4f9f8311 EP |
269 | return -ENODEV; |
270 | ||
3b04ddde | 271 | if (dev->header_ops == NULL || |
adf30907 | 272 | skb_dst(skb) == NULL || |
69cce1d1 | 273 | dst_get_neighbour(skb_dst(skb)) == NULL) |
1da177e4 LT |
274 | return 0; |
275 | return __teql_resolve(skb, skb_res, dev); | |
276 | } | |
277 | ||
6fef4c0c | 278 | static netdev_tx_t teql_master_xmit(struct sk_buff *skb, struct net_device *dev) |
1da177e4 | 279 | { |
2941a486 | 280 | struct teql_master *master = netdev_priv(dev); |
1da177e4 LT |
281 | struct Qdisc *start, *q; |
282 | int busy; | |
283 | int nores; | |
4e3ab47a | 284 | int subq = skb_get_queue_mapping(skb); |
1da177e4 LT |
285 | struct sk_buff *skb_res = NULL; |
286 | ||
287 | start = master->slaves; | |
288 | ||
289 | restart: | |
290 | nores = 0; | |
291 | busy = 0; | |
292 | ||
cc7ec456 ED |
293 | q = start; |
294 | if (!q) | |
1da177e4 LT |
295 | goto drop; |
296 | ||
297 | do { | |
5ce2d488 | 298 | struct net_device *slave = qdisc_dev(q); |
61294e2e SH |
299 | struct netdev_queue *slave_txq = netdev_get_tx_queue(slave, 0); |
300 | const struct net_device_ops *slave_ops = slave->netdev_ops; | |
10297b99 | 301 | |
e8a0464c | 302 | if (slave_txq->qdisc_sleeping != q) |
1da177e4 | 303 | continue; |
fd2ea0a7 | 304 | if (__netif_subqueue_stopped(slave, subq) || |
f25f4e44 | 305 | !netif_running(slave)) { |
1da177e4 LT |
306 | busy = 1; |
307 | continue; | |
308 | } | |
309 | ||
310 | switch (teql_resolve(skb, skb_res, slave)) { | |
311 | case 0: | |
c3f26a26 | 312 | if (__netif_tx_trylock(slave_txq)) { |
c0f84d0d ED |
313 | unsigned int length = qdisc_pkt_len(skb); |
314 | ||
5a0d2268 | 315 | if (!netif_tx_queue_frozen_or_stopped(slave_txq) && |
6fef4c0c | 316 | slave_ops->ndo_start_xmit(skb, slave) == NETDEV_TX_OK) { |
08baf561 | 317 | txq_trans_update(slave_txq); |
c3f26a26 | 318 | __netif_tx_unlock(slave_txq); |
1da177e4 LT |
319 | master->slaves = NEXT_SLAVE(q); |
320 | netif_wake_queue(dev); | |
1ac9ad13 ED |
321 | master->tx_packets++; |
322 | master->tx_bytes += length; | |
6ed10654 | 323 | return NETDEV_TX_OK; |
1da177e4 | 324 | } |
c3f26a26 | 325 | __netif_tx_unlock(slave_txq); |
1da177e4 LT |
326 | } |
327 | if (netif_queue_stopped(dev)) | |
328 | busy = 1; | |
329 | break; | |
330 | case 1: | |
331 | master->slaves = NEXT_SLAVE(q); | |
6ed10654 | 332 | return NETDEV_TX_OK; |
1da177e4 LT |
333 | default: |
334 | nores = 1; | |
335 | break; | |
336 | } | |
bbe735e4 | 337 | __skb_pull(skb, skb_network_offset(skb)); |
1da177e4 LT |
338 | } while ((q = NEXT_SLAVE(q)) != start); |
339 | ||
340 | if (nores && skb_res == NULL) { | |
341 | skb_res = skb; | |
342 | goto restart; | |
343 | } | |
344 | ||
345 | if (busy) { | |
346 | netif_stop_queue(dev); | |
5b548140 | 347 | return NETDEV_TX_BUSY; |
1da177e4 | 348 | } |
1ac9ad13 | 349 | master->tx_errors++; |
1da177e4 LT |
350 | |
351 | drop: | |
1ac9ad13 | 352 | master->tx_dropped++; |
1da177e4 | 353 | dev_kfree_skb(skb); |
6ed10654 | 354 | return NETDEV_TX_OK; |
1da177e4 LT |
355 | } |
356 | ||
357 | static int teql_master_open(struct net_device *dev) | |
358 | { | |
cc7ec456 | 359 | struct Qdisc *q; |
2941a486 | 360 | struct teql_master *m = netdev_priv(dev); |
1da177e4 | 361 | int mtu = 0xFFFE; |
cc7ec456 | 362 | unsigned int flags = IFF_NOARP | IFF_MULTICAST; |
1da177e4 LT |
363 | |
364 | if (m->slaves == NULL) | |
365 | return -EUNATCH; | |
366 | ||
367 | flags = FMASK; | |
368 | ||
369 | q = m->slaves; | |
370 | do { | |
5ce2d488 | 371 | struct net_device *slave = qdisc_dev(q); |
1da177e4 LT |
372 | |
373 | if (slave == NULL) | |
374 | return -EUNATCH; | |
375 | ||
376 | if (slave->mtu < mtu) | |
377 | mtu = slave->mtu; | |
378 | if (slave->hard_header_len > LL_MAX_HEADER) | |
379 | return -EINVAL; | |
380 | ||
381 | /* If all the slaves are BROADCAST, master is BROADCAST | |
382 | If all the slaves are PtP, master is PtP | |
383 | Otherwise, master is NBMA. | |
384 | */ | |
385 | if (!(slave->flags&IFF_POINTOPOINT)) | |
386 | flags &= ~IFF_POINTOPOINT; | |
387 | if (!(slave->flags&IFF_BROADCAST)) | |
388 | flags &= ~IFF_BROADCAST; | |
389 | if (!(slave->flags&IFF_MULTICAST)) | |
390 | flags &= ~IFF_MULTICAST; | |
391 | } while ((q = NEXT_SLAVE(q)) != m->slaves); | |
392 | ||
393 | m->dev->mtu = mtu; | |
394 | m->dev->flags = (m->dev->flags&~FMASK) | flags; | |
395 | netif_start_queue(m->dev); | |
396 | return 0; | |
397 | } | |
398 | ||
399 | static int teql_master_close(struct net_device *dev) | |
400 | { | |
401 | netif_stop_queue(dev); | |
402 | return 0; | |
403 | } | |
404 | ||
1ac9ad13 ED |
405 | static struct rtnl_link_stats64 *teql_master_stats64(struct net_device *dev, |
406 | struct rtnl_link_stats64 *stats) | |
407 | { | |
408 | struct teql_master *m = netdev_priv(dev); | |
409 | ||
410 | stats->tx_packets = m->tx_packets; | |
411 | stats->tx_bytes = m->tx_bytes; | |
412 | stats->tx_errors = m->tx_errors; | |
413 | stats->tx_dropped = m->tx_dropped; | |
414 | return stats; | |
415 | } | |
416 | ||
1da177e4 LT |
417 | static int teql_master_mtu(struct net_device *dev, int new_mtu) |
418 | { | |
2941a486 | 419 | struct teql_master *m = netdev_priv(dev); |
1da177e4 LT |
420 | struct Qdisc *q; |
421 | ||
422 | if (new_mtu < 68) | |
423 | return -EINVAL; | |
424 | ||
425 | q = m->slaves; | |
426 | if (q) { | |
427 | do { | |
5ce2d488 | 428 | if (new_mtu > qdisc_dev(q)->mtu) |
1da177e4 | 429 | return -EINVAL; |
cc7ec456 | 430 | } while ((q = NEXT_SLAVE(q)) != m->slaves); |
1da177e4 LT |
431 | } |
432 | ||
433 | dev->mtu = new_mtu; | |
434 | return 0; | |
435 | } | |
436 | ||
61294e2e SH |
437 | static const struct net_device_ops teql_netdev_ops = { |
438 | .ndo_open = teql_master_open, | |
439 | .ndo_stop = teql_master_close, | |
440 | .ndo_start_xmit = teql_master_xmit, | |
1ac9ad13 | 441 | .ndo_get_stats64 = teql_master_stats64, |
61294e2e SH |
442 | .ndo_change_mtu = teql_master_mtu, |
443 | }; | |
444 | ||
1da177e4 LT |
445 | static __init void teql_master_setup(struct net_device *dev) |
446 | { | |
2941a486 | 447 | struct teql_master *master = netdev_priv(dev); |
1da177e4 LT |
448 | struct Qdisc_ops *ops = &master->qops; |
449 | ||
450 | master->dev = dev; | |
451 | ops->priv_size = sizeof(struct teql_sched_data); | |
10297b99 | 452 | |
1da177e4 LT |
453 | ops->enqueue = teql_enqueue; |
454 | ops->dequeue = teql_dequeue; | |
8e3af978 | 455 | ops->peek = teql_peek; |
1da177e4 LT |
456 | ops->init = teql_qdisc_init; |
457 | ops->reset = teql_reset; | |
458 | ops->destroy = teql_destroy; | |
459 | ops->owner = THIS_MODULE; | |
460 | ||
61294e2e | 461 | dev->netdev_ops = &teql_netdev_ops; |
1da177e4 LT |
462 | dev->type = ARPHRD_VOID; |
463 | dev->mtu = 1500; | |
464 | dev->tx_queue_len = 100; | |
465 | dev->flags = IFF_NOARP; | |
466 | dev->hard_header_len = LL_MAX_HEADER; | |
fa68a782 | 467 | dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
1da177e4 LT |
468 | } |
469 | ||
470 | static LIST_HEAD(master_dev_list); | |
471 | static int max_equalizers = 1; | |
472 | module_param(max_equalizers, int, 0); | |
473 | MODULE_PARM_DESC(max_equalizers, "Max number of link equalizers"); | |
474 | ||
475 | static int __init teql_init(void) | |
476 | { | |
477 | int i; | |
478 | int err = -ENODEV; | |
479 | ||
480 | for (i = 0; i < max_equalizers; i++) { | |
481 | struct net_device *dev; | |
482 | struct teql_master *master; | |
483 | ||
484 | dev = alloc_netdev(sizeof(struct teql_master), | |
485 | "teql%d", teql_master_setup); | |
486 | if (!dev) { | |
487 | err = -ENOMEM; | |
488 | break; | |
489 | } | |
490 | ||
491 | if ((err = register_netdev(dev))) { | |
492 | free_netdev(dev); | |
493 | break; | |
494 | } | |
495 | ||
2941a486 | 496 | master = netdev_priv(dev); |
1da177e4 LT |
497 | |
498 | strlcpy(master->qops.id, dev->name, IFNAMSIZ); | |
499 | err = register_qdisc(&master->qops); | |
500 | ||
501 | if (err) { | |
502 | unregister_netdev(dev); | |
503 | free_netdev(dev); | |
504 | break; | |
505 | } | |
506 | ||
507 | list_add_tail(&master->master_list, &master_dev_list); | |
508 | } | |
509 | return i ? 0 : err; | |
510 | } | |
511 | ||
10297b99 | 512 | static void __exit teql_exit(void) |
1da177e4 LT |
513 | { |
514 | struct teql_master *master, *nxt; | |
515 | ||
516 | list_for_each_entry_safe(master, nxt, &master_dev_list, master_list) { | |
517 | ||
518 | list_del(&master->master_list); | |
519 | ||
520 | unregister_qdisc(&master->qops); | |
521 | unregister_netdev(master->dev); | |
522 | free_netdev(master->dev); | |
523 | } | |
524 | } | |
525 | ||
526 | module_init(teql_init); | |
527 | module_exit(teql_exit); | |
528 | ||
529 | MODULE_LICENSE("GPL"); |