Root/
1 | /********************************************************************* |
2 | * |
3 | * Filename: irlap.c |
4 | * Version: 1.0 |
5 | * Description: IrLAP implementation for Linux |
6 | * Status: Stable |
7 | * Author: Dag Brattli <dagb@cs.uit.no> |
8 | * Created at: Mon Aug 4 20:40:53 1997 |
9 | * Modified at: Tue Dec 14 09:26:44 1999 |
10 | * Modified by: Dag Brattli <dagb@cs.uit.no> |
11 | * |
12 | * Copyright (c) 1998-1999 Dag Brattli, All Rights Reserved. |
13 | * Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com> |
14 | * |
15 | * This program is free software; you can redistribute it and/or |
16 | * modify it under the terms of the GNU General Public License as |
17 | * published by the Free Software Foundation; either version 2 of |
18 | * the License, or (at your option) any later version. |
19 | * |
20 | * This program is distributed in the hope that it will be useful, |
21 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
23 | * GNU General Public License for more details. |
24 | * |
25 | * You should have received a copy of the GNU General Public License |
26 | * along with this program; if not, write to the Free Software |
27 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
28 | * MA 02111-1307 USA |
29 | * |
30 | ********************************************************************/ |
31 | |
32 | #include <linux/slab.h> |
33 | #include <linux/string.h> |
34 | #include <linux/skbuff.h> |
35 | #include <linux/delay.h> |
36 | #include <linux/proc_fs.h> |
37 | #include <linux/init.h> |
38 | #include <linux/random.h> |
39 | #include <linux/module.h> |
40 | #include <linux/seq_file.h> |
41 | |
42 | #include <net/irda/irda.h> |
43 | #include <net/irda/irda_device.h> |
44 | #include <net/irda/irqueue.h> |
45 | #include <net/irda/irlmp.h> |
46 | #include <net/irda/irlmp_frame.h> |
47 | #include <net/irda/irlap_frame.h> |
48 | #include <net/irda/irlap.h> |
49 | #include <net/irda/timer.h> |
50 | #include <net/irda/qos.h> |
51 | |
52 | static hashbin_t *irlap = NULL; |
53 | int sysctl_slot_timeout = SLOT_TIMEOUT * 1000 / HZ; |
54 | |
55 | /* This is the delay of missed pf period before generating an event |
56 | * to the application. The spec mandate 3 seconds, but in some cases |
57 | * it's way too long. - Jean II */ |
58 | int sysctl_warn_noreply_time = 3; |
59 | |
60 | extern void irlap_queue_xmit(struct irlap_cb *self, struct sk_buff *skb); |
61 | static void __irlap_close(struct irlap_cb *self); |
62 | static void irlap_init_qos_capabilities(struct irlap_cb *self, |
63 | struct qos_info *qos_user); |
64 | |
65 | #ifdef CONFIG_IRDA_DEBUG |
66 | static const char *const lap_reasons[] = { |
67 | "ERROR, NOT USED", |
68 | "LAP_DISC_INDICATION", |
69 | "LAP_NO_RESPONSE", |
70 | "LAP_RESET_INDICATION", |
71 | "LAP_FOUND_NONE", |
72 | "LAP_MEDIA_BUSY", |
73 | "LAP_PRIMARY_CONFLICT", |
74 | "ERROR, NOT USED", |
75 | }; |
76 | #endif /* CONFIG_IRDA_DEBUG */ |
77 | |
78 | int __init irlap_init(void) |
79 | { |
80 | /* Check if the compiler did its job properly. |
81 | * May happen on some ARM configuration, check with Russell King. */ |
82 | IRDA_ASSERT(sizeof(struct xid_frame) == 14, ;); |
83 | IRDA_ASSERT(sizeof(struct test_frame) == 10, ;); |
84 | IRDA_ASSERT(sizeof(struct ua_frame) == 10, ;); |
85 | IRDA_ASSERT(sizeof(struct snrm_frame) == 11, ;); |
86 | |
87 | /* Allocate master array */ |
88 | irlap = hashbin_new(HB_LOCK); |
89 | if (irlap == NULL) { |
90 | IRDA_ERROR("%s: can't allocate irlap hashbin!\n", |
91 | __func__); |
92 | return -ENOMEM; |
93 | } |
94 | |
95 | return 0; |
96 | } |
97 | |
98 | void irlap_cleanup(void) |
99 | { |
100 | IRDA_ASSERT(irlap != NULL, return;); |
101 | |
102 | hashbin_delete(irlap, (FREE_FUNC) __irlap_close); |
103 | } |
104 | |
105 | /* |
106 | * Function irlap_open (driver) |
107 | * |
108 | * Initialize IrLAP layer |
109 | * |
110 | */ |
111 | struct irlap_cb *irlap_open(struct net_device *dev, struct qos_info *qos, |
112 | const char *hw_name) |
113 | { |
114 | struct irlap_cb *self; |
115 | |
116 | IRDA_DEBUG(4, "%s()\n", __func__); |
117 | |
118 | /* Initialize the irlap structure. */ |
119 | self = kzalloc(sizeof(struct irlap_cb), GFP_KERNEL); |
120 | if (self == NULL) |
121 | return NULL; |
122 | |
123 | self->magic = LAP_MAGIC; |
124 | |
125 | /* Make a binding between the layers */ |
126 | self->netdev = dev; |
127 | self->qos_dev = qos; |
128 | /* Copy hardware name */ |
129 | if(hw_name != NULL) { |
130 | strlcpy(self->hw_name, hw_name, sizeof(self->hw_name)); |
131 | } else { |
132 | self->hw_name[0] = '\0'; |
133 | } |
134 | |
135 | /* FIXME: should we get our own field? */ |
136 | dev->atalk_ptr = self; |
137 | |
138 | self->state = LAP_OFFLINE; |
139 | |
140 | /* Initialize transmit queue */ |
141 | skb_queue_head_init(&self->txq); |
142 | skb_queue_head_init(&self->txq_ultra); |
143 | skb_queue_head_init(&self->wx_list); |
144 | |
145 | /* My unique IrLAP device address! */ |
146 | /* We don't want the broadcast address, neither the NULL address |
147 | * (most often used to signify "invalid"), and we don't want an |
148 | * address already in use (otherwise connect won't be able |
149 | * to select the proper link). - Jean II */ |
150 | do { |
151 | get_random_bytes(&self->saddr, sizeof(self->saddr)); |
152 | } while ((self->saddr == 0x0) || (self->saddr == BROADCAST) || |
153 | (hashbin_lock_find(irlap, self->saddr, NULL)) ); |
154 | /* Copy to the driver */ |
155 | memcpy(dev->dev_addr, &self->saddr, 4); |
156 | |
157 | init_timer(&self->slot_timer); |
158 | init_timer(&self->query_timer); |
159 | init_timer(&self->discovery_timer); |
160 | init_timer(&self->final_timer); |
161 | init_timer(&self->poll_timer); |
162 | init_timer(&self->wd_timer); |
163 | init_timer(&self->backoff_timer); |
164 | init_timer(&self->media_busy_timer); |
165 | |
166 | irlap_apply_default_connection_parameters(self); |
167 | |
168 | self->N3 = 3; /* # connections attemts to try before giving up */ |
169 | |
170 | self->state = LAP_NDM; |
171 | |
172 | hashbin_insert(irlap, (irda_queue_t *) self, self->saddr, NULL); |
173 | |
174 | irlmp_register_link(self, self->saddr, &self->notify); |
175 | |
176 | return self; |
177 | } |
178 | EXPORT_SYMBOL(irlap_open); |
179 | |
180 | /* |
181 | * Function __irlap_close (self) |
182 | * |
183 | * Remove IrLAP and all allocated memory. Stop any pending timers. |
184 | * |
185 | */ |
186 | static void __irlap_close(struct irlap_cb *self) |
187 | { |
188 | IRDA_ASSERT(self != NULL, return;); |
189 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); |
190 | |
191 | /* Stop timers */ |
192 | del_timer(&self->slot_timer); |
193 | del_timer(&self->query_timer); |
194 | del_timer(&self->discovery_timer); |
195 | del_timer(&self->final_timer); |
196 | del_timer(&self->poll_timer); |
197 | del_timer(&self->wd_timer); |
198 | del_timer(&self->backoff_timer); |
199 | del_timer(&self->media_busy_timer); |
200 | |
201 | irlap_flush_all_queues(self); |
202 | |
203 | self->magic = 0; |
204 | |
205 | kfree(self); |
206 | } |
207 | |
208 | /* |
209 | * Function irlap_close (self) |
210 | * |
211 | * Remove IrLAP instance |
212 | * |
213 | */ |
214 | void irlap_close(struct irlap_cb *self) |
215 | { |
216 | struct irlap_cb *lap; |
217 | |
218 | IRDA_DEBUG(4, "%s()\n", __func__); |
219 | |
220 | IRDA_ASSERT(self != NULL, return;); |
221 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); |
222 | |
223 | /* We used to send a LAP_DISC_INDICATION here, but this was |
224 | * racy. This has been move within irlmp_unregister_link() |
225 | * itself. Jean II */ |
226 | |
227 | /* Kill the LAP and all LSAPs on top of it */ |
228 | irlmp_unregister_link(self->saddr); |
229 | self->notify.instance = NULL; |
230 | |
231 | /* Be sure that we manage to remove ourself from the hash */ |
232 | lap = hashbin_remove(irlap, self->saddr, NULL); |
233 | if (!lap) { |
234 | IRDA_DEBUG(1, "%s(), Didn't find myself!\n", __func__); |
235 | return; |
236 | } |
237 | __irlap_close(lap); |
238 | } |
239 | EXPORT_SYMBOL(irlap_close); |
240 | |
241 | /* |
242 | * Function irlap_connect_indication (self, skb) |
243 | * |
244 | * Another device is attempting to make a connection |
245 | * |
246 | */ |
247 | void irlap_connect_indication(struct irlap_cb *self, struct sk_buff *skb) |
248 | { |
249 | IRDA_DEBUG(4, "%s()\n", __func__); |
250 | |
251 | IRDA_ASSERT(self != NULL, return;); |
252 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); |
253 | |
254 | irlap_init_qos_capabilities(self, NULL); /* No user QoS! */ |
255 | |
256 | irlmp_link_connect_indication(self->notify.instance, self->saddr, |
257 | self->daddr, &self->qos_tx, skb); |
258 | } |
259 | |
260 | /* |
261 | * Function irlap_connect_response (self, skb) |
262 | * |
263 | * Service user has accepted incoming connection |
264 | * |
265 | */ |
266 | void irlap_connect_response(struct irlap_cb *self, struct sk_buff *userdata) |
267 | { |
268 | IRDA_DEBUG(4, "%s()\n", __func__); |
269 | |
270 | irlap_do_event(self, CONNECT_RESPONSE, userdata, NULL); |
271 | } |
272 | |
273 | /* |
274 | * Function irlap_connect_request (self, daddr, qos_user, sniff) |
275 | * |
276 | * Request connection with another device, sniffing is not implemented |
277 | * yet. |
278 | * |
279 | */ |
280 | void irlap_connect_request(struct irlap_cb *self, __u32 daddr, |
281 | struct qos_info *qos_user, int sniff) |
282 | { |
283 | IRDA_DEBUG(3, "%s(), daddr=0x%08x\n", __func__, daddr); |
284 | |
285 | IRDA_ASSERT(self != NULL, return;); |
286 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); |
287 | |
288 | self->daddr = daddr; |
289 | |
290 | /* |
291 | * If the service user specifies QoS values for this connection, |
292 | * then use them |
293 | */ |
294 | irlap_init_qos_capabilities(self, qos_user); |
295 | |
296 | if ((self->state == LAP_NDM) && !self->media_busy) |
297 | irlap_do_event(self, CONNECT_REQUEST, NULL, NULL); |
298 | else |
299 | self->connect_pending = TRUE; |
300 | } |
301 | |
302 | /* |
303 | * Function irlap_connect_confirm (self, skb) |
304 | * |
305 | * Connection request has been accepted |
306 | * |
307 | */ |
308 | void irlap_connect_confirm(struct irlap_cb *self, struct sk_buff *skb) |
309 | { |
310 | IRDA_DEBUG(4, "%s()\n", __func__); |
311 | |
312 | IRDA_ASSERT(self != NULL, return;); |
313 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); |
314 | |
315 | irlmp_link_connect_confirm(self->notify.instance, &self->qos_tx, skb); |
316 | } |
317 | |
318 | /* |
319 | * Function irlap_data_indication (self, skb) |
320 | * |
321 | * Received data frames from IR-port, so we just pass them up to |
322 | * IrLMP for further processing |
323 | * |
324 | */ |
325 | void irlap_data_indication(struct irlap_cb *self, struct sk_buff *skb, |
326 | int unreliable) |
327 | { |
328 | /* Hide LAP header from IrLMP layer */ |
329 | skb_pull(skb, LAP_ADDR_HEADER+LAP_CTRL_HEADER); |
330 | |
331 | irlmp_link_data_indication(self->notify.instance, skb, unreliable); |
332 | } |
333 | |
334 | |
335 | /* |
336 | * Function irlap_data_request (self, skb) |
337 | * |
338 | * Queue data for transmission, must wait until XMIT state |
339 | * |
340 | */ |
341 | void irlap_data_request(struct irlap_cb *self, struct sk_buff *skb, |
342 | int unreliable) |
343 | { |
344 | IRDA_ASSERT(self != NULL, return;); |
345 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); |
346 | |
347 | IRDA_DEBUG(3, "%s()\n", __func__); |
348 | |
349 | IRDA_ASSERT(skb_headroom(skb) >= (LAP_ADDR_HEADER+LAP_CTRL_HEADER), |
350 | return;); |
351 | skb_push(skb, LAP_ADDR_HEADER+LAP_CTRL_HEADER); |
352 | |
353 | /* |
354 | * Must set frame format now so that the rest of the code knows |
355 | * if its dealing with an I or an UI frame |
356 | */ |
357 | if (unreliable) |
358 | skb->data[1] = UI_FRAME; |
359 | else |
360 | skb->data[1] = I_FRAME; |
361 | |
362 | /* Don't forget to refcount it - see irlmp_connect_request(). */ |
363 | skb_get(skb); |
364 | |
365 | /* Add at the end of the queue (keep ordering) - Jean II */ |
366 | skb_queue_tail(&self->txq, skb); |
367 | |
368 | /* |
369 | * Send event if this frame only if we are in the right state |
370 | * FIXME: udata should be sent first! (skb_queue_head?) |
371 | */ |
372 | if ((self->state == LAP_XMIT_P) || (self->state == LAP_XMIT_S)) { |
373 | /* If we are not already processing the Tx queue, trigger |
374 | * transmission immediately - Jean II */ |
375 | if((skb_queue_len(&self->txq) <= 1) && (!self->local_busy)) |
376 | irlap_do_event(self, DATA_REQUEST, skb, NULL); |
377 | /* Otherwise, the packets will be sent normally at the |
378 | * next pf-poll - Jean II */ |
379 | } |
380 | } |
381 | |
382 | /* |
383 | * Function irlap_unitdata_request (self, skb) |
384 | * |
385 | * Send Ultra data. This is data that must be sent outside any connection |
386 | * |
387 | */ |
388 | #ifdef CONFIG_IRDA_ULTRA |
389 | void irlap_unitdata_request(struct irlap_cb *self, struct sk_buff *skb) |
390 | { |
391 | IRDA_ASSERT(self != NULL, return;); |
392 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); |
393 | |
394 | IRDA_DEBUG(3, "%s()\n", __func__); |
395 | |
396 | IRDA_ASSERT(skb_headroom(skb) >= (LAP_ADDR_HEADER+LAP_CTRL_HEADER), |
397 | return;); |
398 | skb_push(skb, LAP_ADDR_HEADER+LAP_CTRL_HEADER); |
399 | |
400 | skb->data[0] = CBROADCAST; |
401 | skb->data[1] = UI_FRAME; |
402 | |
403 | /* Don't need to refcount, see irlmp_connless_data_request() */ |
404 | |
405 | skb_queue_tail(&self->txq_ultra, skb); |
406 | |
407 | irlap_do_event(self, SEND_UI_FRAME, NULL, NULL); |
408 | } |
409 | #endif /*CONFIG_IRDA_ULTRA */ |
410 | |
411 | /* |
412 | * Function irlap_udata_indication (self, skb) |
413 | * |
414 | * Receive Ultra data. This is data that is received outside any connection |
415 | * |
416 | */ |
417 | #ifdef CONFIG_IRDA_ULTRA |
418 | void irlap_unitdata_indication(struct irlap_cb *self, struct sk_buff *skb) |
419 | { |
420 | IRDA_DEBUG(1, "%s()\n", __func__); |
421 | |
422 | IRDA_ASSERT(self != NULL, return;); |
423 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); |
424 | IRDA_ASSERT(skb != NULL, return;); |
425 | |
426 | /* Hide LAP header from IrLMP layer */ |
427 | skb_pull(skb, LAP_ADDR_HEADER+LAP_CTRL_HEADER); |
428 | |
429 | irlmp_link_unitdata_indication(self->notify.instance, skb); |
430 | } |
431 | #endif /* CONFIG_IRDA_ULTRA */ |
432 | |
433 | /* |
434 | * Function irlap_disconnect_request (void) |
435 | * |
436 | * Request to disconnect connection by service user |
437 | */ |
438 | void irlap_disconnect_request(struct irlap_cb *self) |
439 | { |
440 | IRDA_DEBUG(3, "%s()\n", __func__); |
441 | |
442 | IRDA_ASSERT(self != NULL, return;); |
443 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); |
444 | |
445 | /* Don't disconnect until all data frames are successfully sent */ |
446 | if (!skb_queue_empty(&self->txq)) { |
447 | self->disconnect_pending = TRUE; |
448 | return; |
449 | } |
450 | |
451 | /* Check if we are in the right state for disconnecting */ |
452 | switch (self->state) { |
453 | case LAP_XMIT_P: /* FALLTROUGH */ |
454 | case LAP_XMIT_S: /* FALLTROUGH */ |
455 | case LAP_CONN: /* FALLTROUGH */ |
456 | case LAP_RESET_WAIT: /* FALLTROUGH */ |
457 | case LAP_RESET_CHECK: |
458 | irlap_do_event(self, DISCONNECT_REQUEST, NULL, NULL); |
459 | break; |
460 | default: |
461 | IRDA_DEBUG(2, "%s(), disconnect pending!\n", __func__); |
462 | self->disconnect_pending = TRUE; |
463 | break; |
464 | } |
465 | } |
466 | |
467 | /* |
468 | * Function irlap_disconnect_indication (void) |
469 | * |
470 | * Disconnect request from other device |
471 | * |
472 | */ |
473 | void irlap_disconnect_indication(struct irlap_cb *self, LAP_REASON reason) |
474 | { |
475 | IRDA_DEBUG(1, "%s(), reason=%s\n", __func__, lap_reasons[reason]); |
476 | |
477 | IRDA_ASSERT(self != NULL, return;); |
478 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); |
479 | |
480 | /* Flush queues */ |
481 | irlap_flush_all_queues(self); |
482 | |
483 | switch (reason) { |
484 | case LAP_RESET_INDICATION: |
485 | IRDA_DEBUG(1, "%s(), Sending reset request!\n", __func__); |
486 | irlap_do_event(self, RESET_REQUEST, NULL, NULL); |
487 | break; |
488 | case LAP_NO_RESPONSE: /* FALLTROUGH */ |
489 | case LAP_DISC_INDICATION: /* FALLTROUGH */ |
490 | case LAP_FOUND_NONE: /* FALLTROUGH */ |
491 | case LAP_MEDIA_BUSY: |
492 | irlmp_link_disconnect_indication(self->notify.instance, self, |
493 | reason, NULL); |
494 | break; |
495 | default: |
496 | IRDA_ERROR("%s: Unknown reason %d\n", __func__, reason); |
497 | } |
498 | } |
499 | |
500 | /* |
501 | * Function irlap_discovery_request (gen_addr_bit) |
502 | * |
503 | * Start one single discovery operation. |
504 | * |
505 | */ |
506 | void irlap_discovery_request(struct irlap_cb *self, discovery_t *discovery) |
507 | { |
508 | struct irlap_info info; |
509 | |
510 | IRDA_ASSERT(self != NULL, return;); |
511 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); |
512 | IRDA_ASSERT(discovery != NULL, return;); |
513 | |
514 | IRDA_DEBUG(4, "%s(), nslots = %d\n", __func__, discovery->nslots); |
515 | |
516 | IRDA_ASSERT((discovery->nslots == 1) || (discovery->nslots == 6) || |
517 | (discovery->nslots == 8) || (discovery->nslots == 16), |
518 | return;); |
519 | |
520 | /* Discovery is only possible in NDM mode */ |
521 | if (self->state != LAP_NDM) { |
522 | IRDA_DEBUG(4, "%s(), discovery only possible in NDM mode\n", |
523 | __func__); |
524 | irlap_discovery_confirm(self, NULL); |
525 | /* Note : in theory, if we are not in NDM, we could postpone |
526 | * the discovery like we do for connection request. |
527 | * In practice, it's not worth it. If the media was busy, |
528 | * it's likely next time around it won't be busy. If we are |
529 | * in REPLY state, we will get passive discovery info & event. |
530 | * Jean II */ |
531 | return; |
532 | } |
533 | |
534 | /* Check if last discovery request finished in time, or if |
535 | * it was aborted due to the media busy flag. */ |
536 | if (self->discovery_log != NULL) { |
537 | hashbin_delete(self->discovery_log, (FREE_FUNC) kfree); |
538 | self->discovery_log = NULL; |
539 | } |
540 | |
541 | /* All operations will occur at predictable time, no need to lock */ |
542 | self->discovery_log = hashbin_new(HB_NOLOCK); |
543 | |
544 | if (self->discovery_log == NULL) { |
545 | IRDA_WARNING("%s(), Unable to allocate discovery log!\n", |
546 | __func__); |
547 | return; |
548 | } |
549 | |
550 | info.S = discovery->nslots; /* Number of slots */ |
551 | info.s = 0; /* Current slot */ |
552 | |
553 | self->discovery_cmd = discovery; |
554 | info.discovery = discovery; |
555 | |
556 | /* sysctl_slot_timeout bounds are checked in irsysctl.c - Jean II */ |
557 | self->slot_timeout = sysctl_slot_timeout * HZ / 1000; |
558 | |
559 | irlap_do_event(self, DISCOVERY_REQUEST, NULL, &info); |
560 | } |
561 | |
562 | /* |
563 | * Function irlap_discovery_confirm (log) |
564 | * |
565 | * A device has been discovered in front of this station, we |
566 | * report directly to LMP. |
567 | */ |
568 | void irlap_discovery_confirm(struct irlap_cb *self, hashbin_t *discovery_log) |
569 | { |
570 | IRDA_ASSERT(self != NULL, return;); |
571 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); |
572 | |
573 | IRDA_ASSERT(self->notify.instance != NULL, return;); |
574 | |
575 | /* |
576 | * Check for successful discovery, since we are then allowed to clear |
577 | * the media busy condition (IrLAP 6.13.4 - p.94). This should allow |
578 | * us to make connection attempts much faster and easier (i.e. no |
579 | * collisions). |
580 | * Setting media busy to false will also generate an event allowing |
581 | * to process pending events in NDM state machine. |
582 | * Note : the spec doesn't define what's a successful discovery is. |
583 | * If we want Ultra to work, it's successful even if there is |
584 | * nobody discovered - Jean II |
585 | */ |
586 | if (discovery_log) |
587 | irda_device_set_media_busy(self->netdev, FALSE); |
588 | |
589 | /* Inform IrLMP */ |
590 | irlmp_link_discovery_confirm(self->notify.instance, discovery_log); |
591 | } |
592 | |
593 | /* |
594 | * Function irlap_discovery_indication (log) |
595 | * |
596 | * Somebody is trying to discover us! |
597 | * |
598 | */ |
599 | void irlap_discovery_indication(struct irlap_cb *self, discovery_t *discovery) |
600 | { |
601 | IRDA_DEBUG(4, "%s()\n", __func__); |
602 | |
603 | IRDA_ASSERT(self != NULL, return;); |
604 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); |
605 | IRDA_ASSERT(discovery != NULL, return;); |
606 | |
607 | IRDA_ASSERT(self->notify.instance != NULL, return;); |
608 | |
609 | /* A device is very likely to connect immediately after it performs |
610 | * a successful discovery. This means that in our case, we are much |
611 | * more likely to receive a connection request over the medium. |
612 | * So, we backoff to avoid collisions. |
613 | * IrLAP spec 6.13.4 suggest 100ms... |
614 | * Note : this little trick actually make a *BIG* difference. If I set |
615 | * my Linux box with discovery enabled and one Ultra frame sent every |
616 | * second, my Palm has no trouble connecting to it every time ! |
617 | * Jean II */ |
618 | irda_device_set_media_busy(self->netdev, SMALL); |
619 | |
620 | irlmp_link_discovery_indication(self->notify.instance, discovery); |
621 | } |
622 | |
623 | /* |
624 | * Function irlap_status_indication (quality_of_link) |
625 | */ |
626 | void irlap_status_indication(struct irlap_cb *self, int quality_of_link) |
627 | { |
628 | switch (quality_of_link) { |
629 | case STATUS_NO_ACTIVITY: |
630 | IRDA_MESSAGE("IrLAP, no activity on link!\n"); |
631 | break; |
632 | case STATUS_NOISY: |
633 | IRDA_MESSAGE("IrLAP, noisy link!\n"); |
634 | break; |
635 | default: |
636 | break; |
637 | } |
638 | irlmp_status_indication(self->notify.instance, |
639 | quality_of_link, LOCK_NO_CHANGE); |
640 | } |
641 | |
642 | /* |
643 | * Function irlap_reset_indication (void) |
644 | */ |
645 | void irlap_reset_indication(struct irlap_cb *self) |
646 | { |
647 | IRDA_DEBUG(1, "%s()\n", __func__); |
648 | |
649 | IRDA_ASSERT(self != NULL, return;); |
650 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); |
651 | |
652 | if (self->state == LAP_RESET_WAIT) |
653 | irlap_do_event(self, RESET_REQUEST, NULL, NULL); |
654 | else |
655 | irlap_do_event(self, RESET_RESPONSE, NULL, NULL); |
656 | } |
657 | |
658 | /* |
659 | * Function irlap_reset_confirm (void) |
660 | */ |
661 | void irlap_reset_confirm(void) |
662 | { |
663 | IRDA_DEBUG(1, "%s()\n", __func__); |
664 | } |
665 | |
666 | /* |
667 | * Function irlap_generate_rand_time_slot (S, s) |
668 | * |
669 | * Generate a random time slot between s and S-1 where |
670 | * S = Number of slots (0 -> S-1) |
671 | * s = Current slot |
672 | */ |
673 | int irlap_generate_rand_time_slot(int S, int s) |
674 | { |
675 | static int rand; |
676 | int slot; |
677 | |
678 | IRDA_ASSERT((S - s) > 0, return 0;); |
679 | |
680 | rand += jiffies; |
681 | rand ^= (rand << 12); |
682 | rand ^= (rand >> 20); |
683 | |
684 | slot = s + rand % (S-s); |
685 | |
686 | IRDA_ASSERT((slot >= s) || (slot < S), return 0;); |
687 | |
688 | return slot; |
689 | } |
690 | |
691 | /* |
692 | * Function irlap_update_nr_received (nr) |
693 | * |
694 | * Remove all acknowledged frames in current window queue. This code is |
695 | * not intuitive and you should not try to change it. If you think it |
696 | * contains bugs, please mail a patch to the author instead. |
697 | */ |
698 | void irlap_update_nr_received(struct irlap_cb *self, int nr) |
699 | { |
700 | struct sk_buff *skb = NULL; |
701 | int count = 0; |
702 | |
703 | /* |
704 | * Remove all the ack-ed frames from the window queue. |
705 | */ |
706 | |
707 | /* |
708 | * Optimize for the common case. It is most likely that the receiver |
709 | * will acknowledge all the frames we have sent! So in that case we |
710 | * delete all frames stored in window. |
711 | */ |
712 | if (nr == self->vs) { |
713 | while ((skb = skb_dequeue(&self->wx_list)) != NULL) { |
714 | dev_kfree_skb(skb); |
715 | } |
716 | /* The last acked frame is the next to send minus one */ |
717 | self->va = nr - 1; |
718 | } else { |
719 | /* Remove all acknowledged frames in current window */ |
720 | while ((skb_peek(&self->wx_list) != NULL) && |
721 | (((self->va+1) % 8) != nr)) |
722 | { |
723 | skb = skb_dequeue(&self->wx_list); |
724 | dev_kfree_skb(skb); |
725 | |
726 | self->va = (self->va + 1) % 8; |
727 | count++; |
728 | } |
729 | } |
730 | |
731 | /* Advance window */ |
732 | self->window = self->window_size - skb_queue_len(&self->wx_list); |
733 | } |
734 | |
735 | /* |
736 | * Function irlap_validate_ns_received (ns) |
737 | * |
738 | * Validate the next to send (ns) field from received frame. |
739 | */ |
740 | int irlap_validate_ns_received(struct irlap_cb *self, int ns) |
741 | { |
742 | /* ns as expected? */ |
743 | if (ns == self->vr) |
744 | return NS_EXPECTED; |
745 | /* |
746 | * Stations are allowed to treat invalid NS as unexpected NS |
747 | * IrLAP, Recv ... with-invalid-Ns. p. 84 |
748 | */ |
749 | return NS_UNEXPECTED; |
750 | |
751 | /* return NR_INVALID; */ |
752 | } |
753 | /* |
754 | * Function irlap_validate_nr_received (nr) |
755 | * |
756 | * Validate the next to receive (nr) field from received frame. |
757 | * |
758 | */ |
759 | int irlap_validate_nr_received(struct irlap_cb *self, int nr) |
760 | { |
761 | /* nr as expected? */ |
762 | if (nr == self->vs) { |
763 | IRDA_DEBUG(4, "%s(), expected!\n", __func__); |
764 | return NR_EXPECTED; |
765 | } |
766 | |
767 | /* |
768 | * unexpected nr? (but within current window), first we check if the |
769 | * ns numbers of the frames in the current window wrap. |
770 | */ |
771 | if (self->va < self->vs) { |
772 | if ((nr >= self->va) && (nr <= self->vs)) |
773 | return NR_UNEXPECTED; |
774 | } else { |
775 | if ((nr >= self->va) || (nr <= self->vs)) |
776 | return NR_UNEXPECTED; |
777 | } |
778 | |
779 | /* Invalid nr! */ |
780 | return NR_INVALID; |
781 | } |
782 | |
783 | /* |
784 | * Function irlap_initiate_connection_state () |
785 | * |
786 | * Initialize the connection state parameters |
787 | * |
788 | */ |
789 | void irlap_initiate_connection_state(struct irlap_cb *self) |
790 | { |
791 | IRDA_DEBUG(4, "%s()\n", __func__); |
792 | |
793 | IRDA_ASSERT(self != NULL, return;); |
794 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); |
795 | |
796 | /* Next to send and next to receive */ |
797 | self->vs = self->vr = 0; |
798 | |
799 | /* Last frame which got acked (0 - 1) % 8 */ |
800 | self->va = 7; |
801 | |
802 | self->window = 1; |
803 | |
804 | self->remote_busy = FALSE; |
805 | self->retry_count = 0; |
806 | } |
807 | |
808 | /* |
809 | * Function irlap_wait_min_turn_around (self, qos) |
810 | * |
811 | * Wait negotiated minimum turn around time, this function actually sets |
812 | * the number of BOS's that must be sent before the next transmitted |
813 | * frame in order to delay for the specified amount of time. This is |
814 | * done to avoid using timers, and the forbidden udelay! |
815 | */ |
816 | void irlap_wait_min_turn_around(struct irlap_cb *self, struct qos_info *qos) |
817 | { |
818 | __u32 min_turn_time; |
819 | __u32 speed; |
820 | |
821 | /* Get QoS values. */ |
822 | speed = qos->baud_rate.value; |
823 | min_turn_time = qos->min_turn_time.value; |
824 | |
825 | /* No need to calculate XBOFs for speeds over 115200 bps */ |
826 | if (speed > 115200) { |
827 | self->mtt_required = min_turn_time; |
828 | return; |
829 | } |
830 | |
831 | /* |
832 | * Send additional BOF's for the next frame for the requested |
833 | * min turn time, so now we must calculate how many chars (XBOF's) we |
834 | * must send for the requested time period (min turn time) |
835 | */ |
836 | self->xbofs_delay = irlap_min_turn_time_in_bytes(speed, min_turn_time); |
837 | } |
838 | |
839 | /* |
840 | * Function irlap_flush_all_queues (void) |
841 | * |
842 | * Flush all queues |
843 | * |
844 | */ |
845 | void irlap_flush_all_queues(struct irlap_cb *self) |
846 | { |
847 | struct sk_buff* skb; |
848 | |
849 | IRDA_ASSERT(self != NULL, return;); |
850 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); |
851 | |
852 | /* Free transmission queue */ |
853 | while ((skb = skb_dequeue(&self->txq)) != NULL) |
854 | dev_kfree_skb(skb); |
855 | |
856 | while ((skb = skb_dequeue(&self->txq_ultra)) != NULL) |
857 | dev_kfree_skb(skb); |
858 | |
859 | /* Free sliding window buffered packets */ |
860 | while ((skb = skb_dequeue(&self->wx_list)) != NULL) |
861 | dev_kfree_skb(skb); |
862 | } |
863 | |
864 | /* |
865 | * Function irlap_setspeed (self, speed) |
866 | * |
867 | * Change the speed of the IrDA port |
868 | * |
869 | */ |
870 | static void irlap_change_speed(struct irlap_cb *self, __u32 speed, int now) |
871 | { |
872 | struct sk_buff *skb; |
873 | |
874 | IRDA_DEBUG(0, "%s(), setting speed to %d\n", __func__, speed); |
875 | |
876 | IRDA_ASSERT(self != NULL, return;); |
877 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); |
878 | |
879 | self->speed = speed; |
880 | |
881 | /* Change speed now, or just piggyback speed on frames */ |
882 | if (now) { |
883 | /* Send down empty frame to trigger speed change */ |
884 | skb = alloc_skb(0, GFP_ATOMIC); |
885 | if (skb) |
886 | irlap_queue_xmit(self, skb); |
887 | } |
888 | } |
889 | |
890 | /* |
891 | * Function irlap_init_qos_capabilities (self, qos) |
892 | * |
893 | * Initialize QoS for this IrLAP session, What we do is to compute the |
894 | * intersection of the QoS capabilities for the user, driver and for |
895 | * IrLAP itself. Normally, IrLAP will not specify any values, but it can |
896 | * be used to restrict certain values. |
897 | */ |
898 | static void irlap_init_qos_capabilities(struct irlap_cb *self, |
899 | struct qos_info *qos_user) |
900 | { |
901 | IRDA_ASSERT(self != NULL, return;); |
902 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); |
903 | IRDA_ASSERT(self->netdev != NULL, return;); |
904 | |
905 | /* Start out with the maximum QoS support possible */ |
906 | irda_init_max_qos_capabilies(&self->qos_rx); |
907 | |
908 | /* Apply drivers QoS capabilities */ |
909 | irda_qos_compute_intersection(&self->qos_rx, self->qos_dev); |
910 | |
911 | /* |
912 | * Check for user supplied QoS parameters. The service user is only |
913 | * allowed to supply these values. We check each parameter since the |
914 | * user may not have set all of them. |
915 | */ |
916 | if (qos_user) { |
917 | IRDA_DEBUG(1, "%s(), Found user specified QoS!\n", __func__); |
918 | |
919 | if (qos_user->baud_rate.bits) |
920 | self->qos_rx.baud_rate.bits &= qos_user->baud_rate.bits; |
921 | |
922 | if (qos_user->max_turn_time.bits) |
923 | self->qos_rx.max_turn_time.bits &= qos_user->max_turn_time.bits; |
924 | if (qos_user->data_size.bits) |
925 | self->qos_rx.data_size.bits &= qos_user->data_size.bits; |
926 | |
927 | if (qos_user->link_disc_time.bits) |
928 | self->qos_rx.link_disc_time.bits &= qos_user->link_disc_time.bits; |
929 | } |
930 | |
931 | /* Use 500ms in IrLAP for now */ |
932 | self->qos_rx.max_turn_time.bits &= 0x01; |
933 | |
934 | /* Set data size */ |
935 | /*self->qos_rx.data_size.bits &= 0x03;*/ |
936 | |
937 | irda_qos_bits_to_value(&self->qos_rx); |
938 | } |
939 | |
940 | /* |
941 | * Function irlap_apply_default_connection_parameters (void, now) |
942 | * |
943 | * Use the default connection and transmission parameters |
944 | */ |
945 | void irlap_apply_default_connection_parameters(struct irlap_cb *self) |
946 | { |
947 | IRDA_DEBUG(4, "%s()\n", __func__); |
948 | |
949 | IRDA_ASSERT(self != NULL, return;); |
950 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); |
951 | |
952 | /* xbofs : Default value in NDM */ |
953 | self->next_bofs = 12; |
954 | self->bofs_count = 12; |
955 | |
956 | /* NDM Speed is 9600 */ |
957 | irlap_change_speed(self, 9600, TRUE); |
958 | |
959 | /* Set mbusy when going to NDM state */ |
960 | irda_device_set_media_busy(self->netdev, TRUE); |
961 | |
962 | /* |
963 | * Generate random connection address for this session, which must |
964 | * be 7 bits wide and different from 0x00 and 0xfe |
965 | */ |
966 | while ((self->caddr == 0x00) || (self->caddr == 0xfe)) { |
967 | get_random_bytes(&self->caddr, sizeof(self->caddr)); |
968 | self->caddr &= 0xfe; |
969 | } |
970 | |
971 | /* Use default values until connection has been negitiated */ |
972 | self->slot_timeout = sysctl_slot_timeout; |
973 | self->final_timeout = FINAL_TIMEOUT; |
974 | self->poll_timeout = POLL_TIMEOUT; |
975 | self->wd_timeout = WD_TIMEOUT; |
976 | |
977 | /* Set some default values */ |
978 | self->qos_tx.baud_rate.value = 9600; |
979 | self->qos_rx.baud_rate.value = 9600; |
980 | self->qos_tx.max_turn_time.value = 0; |
981 | self->qos_rx.max_turn_time.value = 0; |
982 | self->qos_tx.min_turn_time.value = 0; |
983 | self->qos_rx.min_turn_time.value = 0; |
984 | self->qos_tx.data_size.value = 64; |
985 | self->qos_rx.data_size.value = 64; |
986 | self->qos_tx.window_size.value = 1; |
987 | self->qos_rx.window_size.value = 1; |
988 | self->qos_tx.additional_bofs.value = 12; |
989 | self->qos_rx.additional_bofs.value = 12; |
990 | self->qos_tx.link_disc_time.value = 0; |
991 | self->qos_rx.link_disc_time.value = 0; |
992 | |
993 | irlap_flush_all_queues(self); |
994 | |
995 | self->disconnect_pending = FALSE; |
996 | self->connect_pending = FALSE; |
997 | } |
998 | |
999 | /* |
1000 | * Function irlap_apply_connection_parameters (qos, now) |
1001 | * |
1002 | * Initialize IrLAP with the negotiated QoS values |
1003 | * |
1004 | * If 'now' is false, the speed and xbofs will be changed after the next |
1005 | * frame is sent. |
1006 | * If 'now' is true, the speed and xbofs is changed immediately |
1007 | */ |
1008 | void irlap_apply_connection_parameters(struct irlap_cb *self, int now) |
1009 | { |
1010 | IRDA_DEBUG(4, "%s()\n", __func__); |
1011 | |
1012 | IRDA_ASSERT(self != NULL, return;); |
1013 | IRDA_ASSERT(self->magic == LAP_MAGIC, return;); |
1014 | |
1015 | /* Set the negotiated xbofs value */ |
1016 | self->next_bofs = self->qos_tx.additional_bofs.value; |
1017 | if (now) |
1018 | self->bofs_count = self->next_bofs; |
1019 | |
1020 | /* Set the negotiated link speed (may need the new xbofs value) */ |
1021 | irlap_change_speed(self, self->qos_tx.baud_rate.value, now); |
1022 | |
1023 | self->window_size = self->qos_tx.window_size.value; |
1024 | self->window = self->qos_tx.window_size.value; |
1025 | |
1026 | #ifdef CONFIG_IRDA_DYNAMIC_WINDOW |
1027 | /* |
1028 | * Calculate how many bytes it is possible to transmit before the |
1029 | * link must be turned around |
1030 | */ |
1031 | self->line_capacity = |
1032 | irlap_max_line_capacity(self->qos_tx.baud_rate.value, |
1033 | self->qos_tx.max_turn_time.value); |
1034 | self->bytes_left = self->line_capacity; |
1035 | #endif /* CONFIG_IRDA_DYNAMIC_WINDOW */ |
1036 | |
1037 | |
1038 | /* |
1039 | * Initialize timeout values, some of the rules are listed on |
1040 | * page 92 in IrLAP. |
1041 | */ |
1042 | IRDA_ASSERT(self->qos_tx.max_turn_time.value != 0, return;); |
1043 | IRDA_ASSERT(self->qos_rx.max_turn_time.value != 0, return;); |
1044 | /* The poll timeout applies only to the primary station. |
1045 | * It defines the maximum time the primary stay in XMIT mode |
1046 | * before timeout and turning the link around (sending a RR). |
1047 | * Or, this is how much we can keep the pf bit in primary mode. |
1048 | * Therefore, it must be lower or equal than our *OWN* max turn around. |
1049 | * Jean II */ |
1050 | self->poll_timeout = self->qos_tx.max_turn_time.value * HZ / 1000; |
1051 | /* The Final timeout applies only to the primary station. |
1052 | * It defines the maximum time the primary wait (mostly in RECV mode) |
1053 | * for an answer from the secondary station before polling it again. |
1054 | * Therefore, it must be greater or equal than our *PARTNER* |
1055 | * max turn around time - Jean II */ |
1056 | self->final_timeout = self->qos_rx.max_turn_time.value * HZ / 1000; |
1057 | /* The Watchdog Bit timeout applies only to the secondary station. |
1058 | * It defines the maximum time the secondary wait (mostly in RECV mode) |
1059 | * for poll from the primary station before getting annoyed. |
1060 | * Therefore, it must be greater or equal than our *PARTNER* |
1061 | * max turn around time - Jean II */ |
1062 | self->wd_timeout = self->final_timeout * 2; |
1063 | |
1064 | /* |
1065 | * N1 and N2 are maximum retry count for *both* the final timer |
1066 | * and the wd timer (with a factor 2) as defined above. |
1067 | * After N1 retry of a timer, we give a warning to the user. |
1068 | * After N2 retry, we consider the link dead and disconnect it. |
1069 | * Jean II |
1070 | */ |
1071 | |
1072 | /* |
1073 | * Set N1 to 0 if Link Disconnect/Threshold Time = 3 and set it to |
1074 | * 3 seconds otherwise. See page 71 in IrLAP for more details. |
1075 | * Actually, it's not always 3 seconds, as we allow to set |
1076 | * it via sysctl... Max maxtt is 500ms, and N1 need to be multiple |
1077 | * of 2, so 1 second is minimum we can allow. - Jean II |
1078 | */ |
1079 | if (self->qos_tx.link_disc_time.value == sysctl_warn_noreply_time) |
1080 | /* |
1081 | * If we set N1 to 0, it will trigger immediately, which is |
1082 | * not what we want. What we really want is to disable it, |
1083 | * Jean II |
1084 | */ |
1085 | self->N1 = -2; /* Disable - Need to be multiple of 2*/ |
1086 | else |
1087 | self->N1 = sysctl_warn_noreply_time * 1000 / |
1088 | self->qos_rx.max_turn_time.value; |
1089 | |
1090 | IRDA_DEBUG(4, "Setting N1 = %d\n", self->N1); |
1091 | |
1092 | /* Set N2 to match our own disconnect time */ |
1093 | self->N2 = self->qos_tx.link_disc_time.value * 1000 / |
1094 | self->qos_rx.max_turn_time.value; |
1095 | IRDA_DEBUG(4, "Setting N2 = %d\n", self->N2); |
1096 | } |
1097 | |
1098 | #ifdef CONFIG_PROC_FS |
1099 | struct irlap_iter_state { |
1100 | int id; |
1101 | }; |
1102 | |
1103 | static void *irlap_seq_start(struct seq_file *seq, loff_t *pos) |
1104 | { |
1105 | struct irlap_iter_state *iter = seq->private; |
1106 | struct irlap_cb *self; |
1107 | |
1108 | /* Protect our access to the tsap list */ |
1109 | spin_lock_irq(&irlap->hb_spinlock); |
1110 | iter->id = 0; |
1111 | |
1112 | for (self = (struct irlap_cb *) hashbin_get_first(irlap); |
1113 | self; self = (struct irlap_cb *) hashbin_get_next(irlap)) { |
1114 | if (iter->id == *pos) |
1115 | break; |
1116 | ++iter->id; |
1117 | } |
1118 | |
1119 | return self; |
1120 | } |
1121 | |
1122 | static void *irlap_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
1123 | { |
1124 | struct irlap_iter_state *iter = seq->private; |
1125 | |
1126 | ++*pos; |
1127 | ++iter->id; |
1128 | return (void *) hashbin_get_next(irlap); |
1129 | } |
1130 | |
1131 | static void irlap_seq_stop(struct seq_file *seq, void *v) |
1132 | { |
1133 | spin_unlock_irq(&irlap->hb_spinlock); |
1134 | } |
1135 | |
1136 | static int irlap_seq_show(struct seq_file *seq, void *v) |
1137 | { |
1138 | const struct irlap_iter_state *iter = seq->private; |
1139 | const struct irlap_cb *self = v; |
1140 | |
1141 | IRDA_ASSERT(self->magic == LAP_MAGIC, return -EINVAL;); |
1142 | |
1143 | seq_printf(seq, "irlap%d ", iter->id); |
1144 | seq_printf(seq, "state: %s\n", |
1145 | irlap_state[self->state]); |
1146 | |
1147 | seq_printf(seq, " device name: %s, ", |
1148 | (self->netdev) ? self->netdev->name : "bug"); |
1149 | seq_printf(seq, "hardware name: %s\n", self->hw_name); |
1150 | |
1151 | seq_printf(seq, " caddr: %#02x, ", self->caddr); |
1152 | seq_printf(seq, "saddr: %#08x, ", self->saddr); |
1153 | seq_printf(seq, "daddr: %#08x\n", self->daddr); |
1154 | |
1155 | seq_printf(seq, " win size: %d, ", |
1156 | self->window_size); |
1157 | seq_printf(seq, "win: %d, ", self->window); |
1158 | #ifdef CONFIG_IRDA_DYNAMIC_WINDOW |
1159 | seq_printf(seq, "line capacity: %d, ", |
1160 | self->line_capacity); |
1161 | seq_printf(seq, "bytes left: %d\n", self->bytes_left); |
1162 | #endif /* CONFIG_IRDA_DYNAMIC_WINDOW */ |
1163 | seq_printf(seq, " tx queue len: %d ", |
1164 | skb_queue_len(&self->txq)); |
1165 | seq_printf(seq, "win queue len: %d ", |
1166 | skb_queue_len(&self->wx_list)); |
1167 | seq_printf(seq, "rbusy: %s", self->remote_busy ? |
1168 | "TRUE" : "FALSE"); |
1169 | seq_printf(seq, " mbusy: %s\n", self->media_busy ? |
1170 | "TRUE" : "FALSE"); |
1171 | |
1172 | seq_printf(seq, " retrans: %d ", self->retry_count); |
1173 | seq_printf(seq, "vs: %d ", self->vs); |
1174 | seq_printf(seq, "vr: %d ", self->vr); |
1175 | seq_printf(seq, "va: %d\n", self->va); |
1176 | |
1177 | seq_printf(seq, " qos\tbps\tmaxtt\tdsize\twinsize\taddbofs\tmintt\tldisc\tcomp\n"); |
1178 | |
1179 | seq_printf(seq, " tx\t%d\t", |
1180 | self->qos_tx.baud_rate.value); |
1181 | seq_printf(seq, "%d\t", |
1182 | self->qos_tx.max_turn_time.value); |
1183 | seq_printf(seq, "%d\t", |
1184 | self->qos_tx.data_size.value); |
1185 | seq_printf(seq, "%d\t", |
1186 | self->qos_tx.window_size.value); |
1187 | seq_printf(seq, "%d\t", |
1188 | self->qos_tx.additional_bofs.value); |
1189 | seq_printf(seq, "%d\t", |
1190 | self->qos_tx.min_turn_time.value); |
1191 | seq_printf(seq, "%d\t", |
1192 | self->qos_tx.link_disc_time.value); |
1193 | seq_printf(seq, "\n"); |
1194 | |
1195 | seq_printf(seq, " rx\t%d\t", |
1196 | self->qos_rx.baud_rate.value); |
1197 | seq_printf(seq, "%d\t", |
1198 | self->qos_rx.max_turn_time.value); |
1199 | seq_printf(seq, "%d\t", |
1200 | self->qos_rx.data_size.value); |
1201 | seq_printf(seq, "%d\t", |
1202 | self->qos_rx.window_size.value); |
1203 | seq_printf(seq, "%d\t", |
1204 | self->qos_rx.additional_bofs.value); |
1205 | seq_printf(seq, "%d\t", |
1206 | self->qos_rx.min_turn_time.value); |
1207 | seq_printf(seq, "%d\n", |
1208 | self->qos_rx.link_disc_time.value); |
1209 | |
1210 | return 0; |
1211 | } |
1212 | |
1213 | static const struct seq_operations irlap_seq_ops = { |
1214 | .start = irlap_seq_start, |
1215 | .next = irlap_seq_next, |
1216 | .stop = irlap_seq_stop, |
1217 | .show = irlap_seq_show, |
1218 | }; |
1219 | |
1220 | static int irlap_seq_open(struct inode *inode, struct file *file) |
1221 | { |
1222 | if (irlap == NULL) |
1223 | return -EINVAL; |
1224 | |
1225 | return seq_open_private(file, &irlap_seq_ops, |
1226 | sizeof(struct irlap_iter_state)); |
1227 | } |
1228 | |
1229 | const struct file_operations irlap_seq_fops = { |
1230 | .owner = THIS_MODULE, |
1231 | .open = irlap_seq_open, |
1232 | .read = seq_read, |
1233 | .llseek = seq_lseek, |
1234 | .release = seq_release_private, |
1235 | }; |
1236 | |
1237 | #endif /* CONFIG_PROC_FS */ |
1238 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9