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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /net/irda/irlmp.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'net/irda/irlmp.c')
-rw-r--r--net/irda/irlmp.c2041
1 files changed, 2041 insertions, 0 deletions
diff --git a/net/irda/irlmp.c b/net/irda/irlmp.c
new file mode 100644
index 000000000000..7a4a4d7fbe66
--- /dev/null
+++ b/net/irda/irlmp.c
@@ -0,0 +1,2041 @@
1/*********************************************************************
2 *
3 * Filename: irlmp.c
4 * Version: 1.0
5 * Description: IrDA Link Management Protocol (LMP) layer
6 * Status: Stable.
7 * Author: Dag Brattli <dagb@cs.uit.no>
8 * Created at: Sun Aug 17 20:54:32 1997
9 * Modified at: Wed Jan 5 11:26:03 2000
10 * Modified by: Dag Brattli <dagb@cs.uit.no>
11 *
12 * Copyright (c) 1998-2000 Dag Brattli <dagb@cs.uit.no>,
13 * All Rights Reserved.
14 * Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com>
15 *
16 * This program is free software; you can redistribute it and/or
17 * modify it under the terms of the GNU General Public License as
18 * published by the Free Software Foundation; either version 2 of
19 * the License, or (at your option) any later version.
20 *
21 * Neither Dag Brattli nor University of Tromsų admit liability nor
22 * provide warranty for any of this software. This material is
23 * provided "AS-IS" and at no charge.
24 *
25 ********************************************************************/
26
27#include <linux/config.h>
28#include <linux/module.h>
29#include <linux/slab.h>
30#include <linux/string.h>
31#include <linux/skbuff.h>
32#include <linux/types.h>
33#include <linux/proc_fs.h>
34#include <linux/init.h>
35#include <linux/kmod.h>
36#include <linux/random.h>
37#include <linux/seq_file.h>
38
39#include <net/irda/irda.h>
40#include <net/irda/timer.h>
41#include <net/irda/qos.h>
42#include <net/irda/irlap.h>
43#include <net/irda/iriap.h>
44#include <net/irda/irlmp.h>
45#include <net/irda/irlmp_frame.h>
46
47static __u8 irlmp_find_free_slsap(void);
48static int irlmp_slsap_inuse(__u8 slsap_sel);
49
50/* Master structure */
51struct irlmp_cb *irlmp = NULL;
52
53/* These can be altered by the sysctl interface */
54int sysctl_discovery = 0;
55int sysctl_discovery_timeout = 3; /* 3 seconds by default */
56EXPORT_SYMBOL(sysctl_discovery_timeout);
57int sysctl_discovery_slots = 6; /* 6 slots by default */
58int sysctl_lap_keepalive_time = LM_IDLE_TIMEOUT * 1000 / HZ;
59char sysctl_devname[65];
60
61const char *irlmp_reasons[] = {
62 "ERROR, NOT USED",
63 "LM_USER_REQUEST",
64 "LM_LAP_DISCONNECT",
65 "LM_CONNECT_FAILURE",
66 "LM_LAP_RESET",
67 "LM_INIT_DISCONNECT",
68 "ERROR, NOT USED",
69};
70EXPORT_SYMBOL(irlmp_reasons);
71
72/*
73 * Function irlmp_init (void)
74 *
75 * Create (allocate) the main IrLMP structure
76 *
77 */
78int __init irlmp_init(void)
79{
80 IRDA_DEBUG(1, "%s()\n", __FUNCTION__);
81 /* Initialize the irlmp structure. */
82 irlmp = kmalloc( sizeof(struct irlmp_cb), GFP_KERNEL);
83 if (irlmp == NULL)
84 return -ENOMEM;
85 memset(irlmp, 0, sizeof(struct irlmp_cb));
86
87 irlmp->magic = LMP_MAGIC;
88
89 irlmp->clients = hashbin_new(HB_LOCK);
90 irlmp->services = hashbin_new(HB_LOCK);
91 irlmp->links = hashbin_new(HB_LOCK);
92 irlmp->unconnected_lsaps = hashbin_new(HB_LOCK);
93 irlmp->cachelog = hashbin_new(HB_NOLOCK);
94
95 if ((irlmp->clients == NULL) ||
96 (irlmp->services == NULL) ||
97 (irlmp->links == NULL) ||
98 (irlmp->unconnected_lsaps == NULL) ||
99 (irlmp->cachelog == NULL)) {
100 return -ENOMEM;
101 }
102
103 spin_lock_init(&irlmp->cachelog->hb_spinlock);
104
105 irlmp->last_lsap_sel = 0x0f; /* Reserved 0x00-0x0f */
106 strcpy(sysctl_devname, "Linux");
107
108 /* Do discovery every 3 seconds */
109 init_timer(&irlmp->discovery_timer);
110 irlmp_start_discovery_timer(irlmp, sysctl_discovery_timeout*HZ);
111
112 return 0;
113}
114
115/*
116 * Function irlmp_cleanup (void)
117 *
118 * Remove IrLMP layer
119 *
120 */
121void __exit irlmp_cleanup(void)
122{
123 /* Check for main structure */
124 IRDA_ASSERT(irlmp != NULL, return;);
125 IRDA_ASSERT(irlmp->magic == LMP_MAGIC, return;);
126
127 del_timer(&irlmp->discovery_timer);
128
129 hashbin_delete(irlmp->links, (FREE_FUNC) kfree);
130 hashbin_delete(irlmp->unconnected_lsaps, (FREE_FUNC) kfree);
131 hashbin_delete(irlmp->clients, (FREE_FUNC) kfree);
132 hashbin_delete(irlmp->services, (FREE_FUNC) kfree);
133 hashbin_delete(irlmp->cachelog, (FREE_FUNC) kfree);
134
135 /* De-allocate main structure */
136 kfree(irlmp);
137 irlmp = NULL;
138}
139
140/*
141 * Function irlmp_open_lsap (slsap, notify)
142 *
143 * Register with IrLMP and create a local LSAP,
144 * returns handle to LSAP.
145 */
146struct lsap_cb *irlmp_open_lsap(__u8 slsap_sel, notify_t *notify, __u8 pid)
147{
148 struct lsap_cb *self;
149
150 IRDA_ASSERT(notify != NULL, return NULL;);
151 IRDA_ASSERT(irlmp != NULL, return NULL;);
152 IRDA_ASSERT(irlmp->magic == LMP_MAGIC, return NULL;);
153 IRDA_ASSERT(notify->instance != NULL, return NULL;);
154
155 /* Does the client care which Source LSAP selector it gets? */
156 if (slsap_sel == LSAP_ANY) {
157 slsap_sel = irlmp_find_free_slsap();
158 if (!slsap_sel)
159 return NULL;
160 } else if (irlmp_slsap_inuse(slsap_sel))
161 return NULL;
162
163 /* Allocate new instance of a LSAP connection */
164 self = kmalloc(sizeof(struct lsap_cb), GFP_ATOMIC);
165 if (self == NULL) {
166 IRDA_ERROR("%s: can't allocate memory\n", __FUNCTION__);
167 return NULL;
168 }
169 memset(self, 0, sizeof(struct lsap_cb));
170
171 self->magic = LMP_LSAP_MAGIC;
172 self->slsap_sel = slsap_sel;
173
174 /* Fix connectionless LSAP's */
175 if (slsap_sel == LSAP_CONNLESS) {
176#ifdef CONFIG_IRDA_ULTRA
177 self->dlsap_sel = LSAP_CONNLESS;
178 self->pid = pid;
179#endif /* CONFIG_IRDA_ULTRA */
180 } else
181 self->dlsap_sel = LSAP_ANY;
182 /* self->connected = FALSE; -> already NULL via memset() */
183
184 init_timer(&self->watchdog_timer);
185
186 self->notify = *notify;
187
188 self->lsap_state = LSAP_DISCONNECTED;
189
190 /* Insert into queue of unconnected LSAPs */
191 hashbin_insert(irlmp->unconnected_lsaps, (irda_queue_t *) self,
192 (long) self, NULL);
193
194 return self;
195}
196EXPORT_SYMBOL(irlmp_open_lsap);
197
198/*
199 * Function __irlmp_close_lsap (self)
200 *
201 * Remove an instance of LSAP
202 */
203static void __irlmp_close_lsap(struct lsap_cb *self)
204{
205 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
206
207 IRDA_ASSERT(self != NULL, return;);
208 IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return;);
209
210 /*
211 * Set some of the variables to preset values
212 */
213 self->magic = 0;
214 del_timer(&self->watchdog_timer); /* Important! */
215
216 if (self->conn_skb)
217 dev_kfree_skb(self->conn_skb);
218
219 kfree(self);
220}
221
222/*
223 * Function irlmp_close_lsap (self)
224 *
225 * Close and remove LSAP
226 *
227 */
228void irlmp_close_lsap(struct lsap_cb *self)
229{
230 struct lap_cb *lap;
231 struct lsap_cb *lsap = NULL;
232
233 IRDA_ASSERT(self != NULL, return;);
234 IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return;);
235
236 /*
237 * Find out if we should remove this LSAP from a link or from the
238 * list of unconnected lsaps (not associated with a link)
239 */
240 lap = self->lap;
241 if (lap) {
242 IRDA_ASSERT(lap->magic == LMP_LAP_MAGIC, return;);
243 /* We might close a LSAP before it has completed the
244 * connection setup. In those case, higher layers won't
245 * send a proper disconnect request. Harmless, except
246 * that we will forget to close LAP... - Jean II */
247 if(self->lsap_state != LSAP_DISCONNECTED) {
248 self->lsap_state = LSAP_DISCONNECTED;
249 irlmp_do_lap_event(self->lap,
250 LM_LAP_DISCONNECT_REQUEST, NULL);
251 }
252 /* Now, remove from the link */
253 lsap = hashbin_remove(lap->lsaps, (long) self, NULL);
254#ifdef CONFIG_IRDA_CACHE_LAST_LSAP
255 lap->cache.valid = FALSE;
256#endif
257 }
258 self->lap = NULL;
259 /* Check if we found the LSAP! If not then try the unconnected lsaps */
260 if (!lsap) {
261 lsap = hashbin_remove(irlmp->unconnected_lsaps, (long) self,
262 NULL);
263 }
264 if (!lsap) {
265 IRDA_DEBUG(0,
266 "%s(), Looks like somebody has removed me already!\n",
267 __FUNCTION__);
268 return;
269 }
270 __irlmp_close_lsap(self);
271}
272EXPORT_SYMBOL(irlmp_close_lsap);
273
274/*
275 * Function irlmp_register_irlap (saddr, notify)
276 *
277 * Register IrLAP layer with IrLMP. There is possible to have multiple
278 * instances of the IrLAP layer, each connected to different IrDA ports
279 *
280 */
281void irlmp_register_link(struct irlap_cb *irlap, __u32 saddr, notify_t *notify)
282{
283 struct lap_cb *lap;
284
285 IRDA_ASSERT(irlmp != NULL, return;);
286 IRDA_ASSERT(irlmp->magic == LMP_MAGIC, return;);
287 IRDA_ASSERT(notify != NULL, return;);
288
289 /*
290 * Allocate new instance of a LSAP connection
291 */
292 lap = kmalloc(sizeof(struct lap_cb), GFP_KERNEL);
293 if (lap == NULL) {
294 IRDA_ERROR("%s: unable to kmalloc\n", __FUNCTION__);
295 return;
296 }
297 memset(lap, 0, sizeof(struct lap_cb));
298
299 lap->irlap = irlap;
300 lap->magic = LMP_LAP_MAGIC;
301 lap->saddr = saddr;
302 lap->daddr = DEV_ADDR_ANY;
303#ifdef CONFIG_IRDA_CACHE_LAST_LSAP
304 lap->cache.valid = FALSE;
305#endif
306 lap->lsaps = hashbin_new(HB_LOCK);
307 if (lap->lsaps == NULL) {
308 IRDA_WARNING("%s(), unable to kmalloc lsaps\n", __FUNCTION__);
309 kfree(lap);
310 return;
311 }
312
313 lap->lap_state = LAP_STANDBY;
314
315 init_timer(&lap->idle_timer);
316
317 /*
318 * Insert into queue of LMP links
319 */
320 hashbin_insert(irlmp->links, (irda_queue_t *) lap, lap->saddr, NULL);
321
322 /*
323 * We set only this variable so IrLAP can tell us on which link the
324 * different events happened on
325 */
326 irda_notify_init(notify);
327 notify->instance = lap;
328}
329
330/*
331 * Function irlmp_unregister_irlap (saddr)
332 *
333 * IrLAP layer has been removed!
334 *
335 */
336void irlmp_unregister_link(__u32 saddr)
337{
338 struct lap_cb *link;
339
340 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
341
342 /* We must remove ourselves from the hashbin *first*. This ensure
343 * that no more LSAPs will be open on this link and no discovery
344 * will be triggered anymore. Jean II */
345 link = hashbin_remove(irlmp->links, saddr, NULL);
346 if (link) {
347 IRDA_ASSERT(link->magic == LMP_LAP_MAGIC, return;);
348
349 /* Kill all the LSAPs on this link. Jean II */
350 link->reason = LAP_DISC_INDICATION;
351 link->daddr = DEV_ADDR_ANY;
352 irlmp_do_lap_event(link, LM_LAP_DISCONNECT_INDICATION, NULL);
353
354 /* Remove all discoveries discovered at this link */
355 irlmp_expire_discoveries(irlmp->cachelog, link->saddr, TRUE);
356
357 /* Final cleanup */
358 del_timer(&link->idle_timer);
359 link->magic = 0;
360 kfree(link);
361 }
362}
363
364/*
365 * Function irlmp_connect_request (handle, dlsap, userdata)
366 *
367 * Connect with a peer LSAP
368 *
369 */
370int irlmp_connect_request(struct lsap_cb *self, __u8 dlsap_sel,
371 __u32 saddr, __u32 daddr,
372 struct qos_info *qos, struct sk_buff *userdata)
373{
374 struct sk_buff *tx_skb = userdata;
375 struct lap_cb *lap;
376 struct lsap_cb *lsap;
377 int ret;
378
379 IRDA_ASSERT(self != NULL, return -EBADR;);
380 IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return -EBADR;);
381
382 IRDA_DEBUG(2,
383 "%s(), slsap_sel=%02x, dlsap_sel=%02x, saddr=%08x, daddr=%08x\n",
384 __FUNCTION__, self->slsap_sel, dlsap_sel, saddr, daddr);
385
386 if (test_bit(0, &self->connected)) {
387 ret = -EISCONN;
388 goto err;
389 }
390
391 /* Client must supply destination device address */
392 if (!daddr) {
393 ret = -EINVAL;
394 goto err;
395 }
396
397 /* Any userdata? */
398 if (tx_skb == NULL) {
399 tx_skb = dev_alloc_skb(64);
400 if (!tx_skb)
401 return -ENOMEM;
402
403 skb_reserve(tx_skb, LMP_MAX_HEADER);
404 }
405
406 /* Make room for MUX control header (3 bytes) */
407 IRDA_ASSERT(skb_headroom(tx_skb) >= LMP_CONTROL_HEADER, return -1;);
408 skb_push(tx_skb, LMP_CONTROL_HEADER);
409
410 self->dlsap_sel = dlsap_sel;
411
412 /*
413 * Find the link to where we should try to connect since there may
414 * be more than one IrDA port on this machine. If the client has
415 * passed us the saddr (and already knows which link to use), then
416 * we use that to find the link, if not then we have to look in the
417 * discovery log and check if any of the links has discovered a
418 * device with the given daddr
419 */
420 if ((!saddr) || (saddr == DEV_ADDR_ANY)) {
421 discovery_t *discovery;
422 unsigned long flags;
423
424 spin_lock_irqsave(&irlmp->cachelog->hb_spinlock, flags);
425 if (daddr != DEV_ADDR_ANY)
426 discovery = hashbin_find(irlmp->cachelog, daddr, NULL);
427 else {
428 IRDA_DEBUG(2, "%s(), no daddr\n", __FUNCTION__);
429 discovery = (discovery_t *)
430 hashbin_get_first(irlmp->cachelog);
431 }
432
433 if (discovery) {
434 saddr = discovery->data.saddr;
435 daddr = discovery->data.daddr;
436 }
437 spin_unlock_irqrestore(&irlmp->cachelog->hb_spinlock, flags);
438 }
439 lap = hashbin_lock_find(irlmp->links, saddr, NULL);
440 if (lap == NULL) {
441 IRDA_DEBUG(1, "%s(), Unable to find a usable link!\n", __FUNCTION__);
442 ret = -EHOSTUNREACH;
443 goto err;
444 }
445
446 /* Check if LAP is disconnected or already connected */
447 if (lap->daddr == DEV_ADDR_ANY)
448 lap->daddr = daddr;
449 else if (lap->daddr != daddr) {
450 /* Check if some LSAPs are active on this LAP */
451 if (HASHBIN_GET_SIZE(lap->lsaps) == 0) {
452 /* No active connection, but LAP hasn't been
453 * disconnected yet (waiting for timeout in LAP).
454 * Maybe we could give LAP a bit of help in this case.
455 */
456 IRDA_DEBUG(0, "%s(), sorry, but I'm waiting for LAP to timeout!\n", __FUNCTION__);
457 ret = -EAGAIN;
458 goto err;
459 }
460
461 /* LAP is already connected to a different node, and LAP
462 * can only talk to one node at a time */
463 IRDA_DEBUG(0, "%s(), sorry, but link is busy!\n", __FUNCTION__);
464 ret = -EBUSY;
465 goto err;
466 }
467
468 self->lap = lap;
469
470 /*
471 * Remove LSAP from list of unconnected LSAPs and insert it into the
472 * list of connected LSAPs for the particular link
473 */
474 lsap = hashbin_remove(irlmp->unconnected_lsaps, (long) self, NULL);
475
476 IRDA_ASSERT(lsap != NULL, return -1;);
477 IRDA_ASSERT(lsap->magic == LMP_LSAP_MAGIC, return -1;);
478 IRDA_ASSERT(lsap->lap != NULL, return -1;);
479 IRDA_ASSERT(lsap->lap->magic == LMP_LAP_MAGIC, return -1;);
480
481 hashbin_insert(self->lap->lsaps, (irda_queue_t *) self, (long) self,
482 NULL);
483
484 set_bit(0, &self->connected); /* TRUE */
485
486 /*
487 * User supplied qos specifications?
488 */
489 if (qos)
490 self->qos = *qos;
491
492 irlmp_do_lsap_event(self, LM_CONNECT_REQUEST, tx_skb);
493
494 /* Drop reference count - see irlap_data_request(). */
495 dev_kfree_skb(tx_skb);
496
497 return 0;
498
499err:
500 /* Cleanup */
501 if(tx_skb)
502 dev_kfree_skb(tx_skb);
503 return ret;
504}
505EXPORT_SYMBOL(irlmp_connect_request);
506
507/*
508 * Function irlmp_connect_indication (self)
509 *
510 * Incoming connection
511 *
512 */
513void irlmp_connect_indication(struct lsap_cb *self, struct sk_buff *skb)
514{
515 int max_seg_size;
516 int lap_header_size;
517 int max_header_size;
518
519 IRDA_ASSERT(self != NULL, return;);
520 IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return;);
521 IRDA_ASSERT(skb != NULL, return;);
522 IRDA_ASSERT(self->lap != NULL, return;);
523
524 IRDA_DEBUG(2, "%s(), slsap_sel=%02x, dlsap_sel=%02x\n",
525 __FUNCTION__, self->slsap_sel, self->dlsap_sel);
526
527 /* Note : self->lap is set in irlmp_link_data_indication(),
528 * (case CONNECT_CMD:) because we have no way to set it here.
529 * Similarly, self->dlsap_sel is usually set in irlmp_find_lsap().
530 * Jean II */
531
532 self->qos = *self->lap->qos;
533
534 max_seg_size = self->lap->qos->data_size.value-LMP_HEADER;
535 lap_header_size = IRLAP_GET_HEADER_SIZE(self->lap->irlap);
536 max_header_size = LMP_HEADER + lap_header_size;
537
538 /* Hide LMP_CONTROL_HEADER header from layer above */
539 skb_pull(skb, LMP_CONTROL_HEADER);
540
541 if (self->notify.connect_indication) {
542 /* Don't forget to refcount it - see irlap_driver_rcv(). */
543 skb_get(skb);
544 self->notify.connect_indication(self->notify.instance, self,
545 &self->qos, max_seg_size,
546 max_header_size, skb);
547 }
548}
549
550/*
551 * Function irlmp_connect_response (handle, userdata)
552 *
553 * Service user is accepting connection
554 *
555 */
556int irlmp_connect_response(struct lsap_cb *self, struct sk_buff *userdata)
557{
558 IRDA_ASSERT(self != NULL, return -1;);
559 IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return -1;);
560 IRDA_ASSERT(userdata != NULL, return -1;);
561
562 /* We set the connected bit and move the lsap to the connected list
563 * in the state machine itself. Jean II */
564
565 IRDA_DEBUG(2, "%s(), slsap_sel=%02x, dlsap_sel=%02x\n",
566 __FUNCTION__, self->slsap_sel, self->dlsap_sel);
567
568 /* Make room for MUX control header (3 bytes) */
569 IRDA_ASSERT(skb_headroom(userdata) >= LMP_CONTROL_HEADER, return -1;);
570 skb_push(userdata, LMP_CONTROL_HEADER);
571
572 irlmp_do_lsap_event(self, LM_CONNECT_RESPONSE, userdata);
573
574 /* Drop reference count - see irlap_data_request(). */
575 dev_kfree_skb(userdata);
576
577 return 0;
578}
579EXPORT_SYMBOL(irlmp_connect_response);
580
581/*
582 * Function irlmp_connect_confirm (handle, skb)
583 *
584 * LSAP connection confirmed peer device!
585 */
586void irlmp_connect_confirm(struct lsap_cb *self, struct sk_buff *skb)
587{
588 int max_header_size;
589 int lap_header_size;
590 int max_seg_size;
591
592 IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
593
594 IRDA_ASSERT(skb != NULL, return;);
595 IRDA_ASSERT(self != NULL, return;);
596 IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return;);
597 IRDA_ASSERT(self->lap != NULL, return;);
598
599 self->qos = *self->lap->qos;
600
601 max_seg_size = self->lap->qos->data_size.value-LMP_HEADER;
602 lap_header_size = IRLAP_GET_HEADER_SIZE(self->lap->irlap);
603 max_header_size = LMP_HEADER + lap_header_size;
604
605 IRDA_DEBUG(2, "%s(), max_header_size=%d\n",
606 __FUNCTION__, max_header_size);
607
608 /* Hide LMP_CONTROL_HEADER header from layer above */
609 skb_pull(skb, LMP_CONTROL_HEADER);
610
611 if (self->notify.connect_confirm) {
612 /* Don't forget to refcount it - see irlap_driver_rcv() */
613 skb_get(skb);
614 self->notify.connect_confirm(self->notify.instance, self,
615 &self->qos, max_seg_size,
616 max_header_size, skb);
617 }
618}
619
620/*
621 * Function irlmp_dup (orig, instance)
622 *
623 * Duplicate LSAP, can be used by servers to confirm a connection on a
624 * new LSAP so it can keep listening on the old one.
625 *
626 */
627struct lsap_cb *irlmp_dup(struct lsap_cb *orig, void *instance)
628{
629 struct lsap_cb *new;
630 unsigned long flags;
631
632 IRDA_DEBUG(1, "%s()\n", __FUNCTION__);
633
634 spin_lock_irqsave(&irlmp->unconnected_lsaps->hb_spinlock, flags);
635
636 /* Only allowed to duplicate unconnected LSAP's, and only LSAPs
637 * that have received a connect indication. Jean II */
638 if ((!hashbin_find(irlmp->unconnected_lsaps, (long) orig, NULL)) ||
639 (orig->lap == NULL)) {
640 IRDA_DEBUG(0, "%s(), invalid LSAP (wrong state)\n",
641 __FUNCTION__);
642 spin_unlock_irqrestore(&irlmp->unconnected_lsaps->hb_spinlock,
643 flags);
644 return NULL;
645 }
646
647 /* Allocate a new instance */
648 new = kmalloc(sizeof(struct lsap_cb), GFP_ATOMIC);
649 if (!new) {
650 IRDA_DEBUG(0, "%s(), unable to kmalloc\n", __FUNCTION__);
651 spin_unlock_irqrestore(&irlmp->unconnected_lsaps->hb_spinlock,
652 flags);
653 return NULL;
654 }
655 /* Dup */
656 memcpy(new, orig, sizeof(struct lsap_cb));
657 /* new->lap = orig->lap; => done in the memcpy() */
658 /* new->slsap_sel = orig->slsap_sel; => done in the memcpy() */
659 new->conn_skb = NULL;
660
661 spin_unlock_irqrestore(&irlmp->unconnected_lsaps->hb_spinlock, flags);
662
663 /* Not everything is the same */
664 new->notify.instance = instance;
665
666 init_timer(&new->watchdog_timer);
667
668 hashbin_insert(irlmp->unconnected_lsaps, (irda_queue_t *) new,
669 (long) new, NULL);
670
671#ifdef CONFIG_IRDA_CACHE_LAST_LSAP
672 /* Make sure that we invalidate the LSAP cache */
673 new->lap->cache.valid = FALSE;
674#endif /* CONFIG_IRDA_CACHE_LAST_LSAP */
675
676 return new;
677}
678EXPORT_SYMBOL(irlmp_dup);
679
680/*
681 * Function irlmp_disconnect_request (handle, userdata)
682 *
683 * The service user is requesting disconnection, this will not remove the
684 * LSAP, but only mark it as disconnected
685 */
686int irlmp_disconnect_request(struct lsap_cb *self, struct sk_buff *userdata)
687{
688 struct lsap_cb *lsap;
689
690 IRDA_ASSERT(self != NULL, return -1;);
691 IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return -1;);
692 IRDA_ASSERT(userdata != NULL, return -1;);
693
694 /* Already disconnected ?
695 * There is a race condition between irlmp_disconnect_indication()
696 * and us that might mess up the hashbins below. This fixes it.
697 * Jean II */
698 if (! test_and_clear_bit(0, &self->connected)) {
699 IRDA_DEBUG(0, "%s(), already disconnected!\n", __FUNCTION__);
700 dev_kfree_skb(userdata);
701 return -1;
702 }
703
704 skb_push(userdata, LMP_CONTROL_HEADER);
705
706 /*
707 * Do the event before the other stuff since we must know
708 * which lap layer that the frame should be transmitted on
709 */
710 irlmp_do_lsap_event(self, LM_DISCONNECT_REQUEST, userdata);
711
712 /* Drop reference count - see irlap_data_request(). */
713 dev_kfree_skb(userdata);
714
715 /*
716 * Remove LSAP from list of connected LSAPs for the particular link
717 * and insert it into the list of unconnected LSAPs
718 */
719 IRDA_ASSERT(self->lap != NULL, return -1;);
720 IRDA_ASSERT(self->lap->magic == LMP_LAP_MAGIC, return -1;);
721 IRDA_ASSERT(self->lap->lsaps != NULL, return -1;);
722
723 lsap = hashbin_remove(self->lap->lsaps, (long) self, NULL);
724#ifdef CONFIG_IRDA_CACHE_LAST_LSAP
725 self->lap->cache.valid = FALSE;
726#endif
727
728 IRDA_ASSERT(lsap != NULL, return -1;);
729 IRDA_ASSERT(lsap->magic == LMP_LSAP_MAGIC, return -1;);
730 IRDA_ASSERT(lsap == self, return -1;);
731
732 hashbin_insert(irlmp->unconnected_lsaps, (irda_queue_t *) self,
733 (long) self, NULL);
734
735 /* Reset some values */
736 self->dlsap_sel = LSAP_ANY;
737 self->lap = NULL;
738
739 return 0;
740}
741EXPORT_SYMBOL(irlmp_disconnect_request);
742
743/*
744 * Function irlmp_disconnect_indication (reason, userdata)
745 *
746 * LSAP is being closed!
747 */
748void irlmp_disconnect_indication(struct lsap_cb *self, LM_REASON reason,
749 struct sk_buff *skb)
750{
751 struct lsap_cb *lsap;
752
753 IRDA_DEBUG(1, "%s(), reason=%s\n", __FUNCTION__, irlmp_reasons[reason]);
754 IRDA_ASSERT(self != NULL, return;);
755 IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return;);
756
757 IRDA_DEBUG(3, "%s(), slsap_sel=%02x, dlsap_sel=%02x\n",
758 __FUNCTION__, self->slsap_sel, self->dlsap_sel);
759
760 /* Already disconnected ?
761 * There is a race condition between irlmp_disconnect_request()
762 * and us that might mess up the hashbins below. This fixes it.
763 * Jean II */
764 if (! test_and_clear_bit(0, &self->connected)) {
765 IRDA_DEBUG(0, "%s(), already disconnected!\n", __FUNCTION__);
766 return;
767 }
768
769 /*
770 * Remove association between this LSAP and the link it used
771 */
772 IRDA_ASSERT(self->lap != NULL, return;);
773 IRDA_ASSERT(self->lap->lsaps != NULL, return;);
774
775 lsap = hashbin_remove(self->lap->lsaps, (long) self, NULL);
776#ifdef CONFIG_IRDA_CACHE_LAST_LSAP
777 self->lap->cache.valid = FALSE;
778#endif
779
780 IRDA_ASSERT(lsap != NULL, return;);
781 IRDA_ASSERT(lsap == self, return;);
782 hashbin_insert(irlmp->unconnected_lsaps, (irda_queue_t *) lsap,
783 (long) lsap, NULL);
784
785 self->dlsap_sel = LSAP_ANY;
786 self->lap = NULL;
787
788 /*
789 * Inform service user
790 */
791 if (self->notify.disconnect_indication) {
792 /* Don't forget to refcount it - see irlap_driver_rcv(). */
793 if(skb)
794 skb_get(skb);
795 self->notify.disconnect_indication(self->notify.instance,
796 self, reason, skb);
797 } else {
798 IRDA_DEBUG(0, "%s(), no handler\n", __FUNCTION__);
799 }
800}
801
802/*
803 * Function irlmp_do_expiry (void)
804 *
805 * Do a cleanup of the discovery log (remove old entries)
806 *
807 * Note : separate from irlmp_do_discovery() so that we can handle
808 * passive discovery properly.
809 */
810void irlmp_do_expiry(void)
811{
812 struct lap_cb *lap;
813
814 /*
815 * Expire discovery on all links which are *not* connected.
816 * On links which are connected, we can't do discovery
817 * anymore and can't refresh the log, so we freeze the
818 * discovery log to keep info about the device we are
819 * connected to.
820 * This info is mandatory if we want irlmp_connect_request()
821 * to work properly. - Jean II
822 */
823 lap = (struct lap_cb *) hashbin_get_first(irlmp->links);
824 while (lap != NULL) {
825 IRDA_ASSERT(lap->magic == LMP_LAP_MAGIC, return;);
826
827 if (lap->lap_state == LAP_STANDBY) {
828 /* Expire discoveries discovered on this link */
829 irlmp_expire_discoveries(irlmp->cachelog, lap->saddr,
830 FALSE);
831 }
832 lap = (struct lap_cb *) hashbin_get_next(irlmp->links);
833 }
834}
835
836/*
837 * Function irlmp_do_discovery (nslots)
838 *
839 * Do some discovery on all links
840 *
841 * Note : log expiry is done above.
842 */
843void irlmp_do_discovery(int nslots)
844{
845 struct lap_cb *lap;
846
847 /* Make sure the value is sane */
848 if ((nslots != 1) && (nslots != 6) && (nslots != 8) && (nslots != 16)){
849 IRDA_WARNING("%s: invalid value for number of slots!\n",
850 __FUNCTION__);
851 nslots = sysctl_discovery_slots = 8;
852 }
853
854 /* Construct new discovery info to be used by IrLAP, */
855 u16ho(irlmp->discovery_cmd.data.hints) = irlmp->hints.word;
856
857 /*
858 * Set character set for device name (we use ASCII), and
859 * copy device name. Remember to make room for a \0 at the
860 * end
861 */
862 irlmp->discovery_cmd.data.charset = CS_ASCII;
863 strncpy(irlmp->discovery_cmd.data.info, sysctl_devname,
864 NICKNAME_MAX_LEN);
865 irlmp->discovery_cmd.name_len = strlen(irlmp->discovery_cmd.data.info);
866 irlmp->discovery_cmd.nslots = nslots;
867
868 /*
869 * Try to send discovery packets on all links
870 */
871 lap = (struct lap_cb *) hashbin_get_first(irlmp->links);
872 while (lap != NULL) {
873 IRDA_ASSERT(lap->magic == LMP_LAP_MAGIC, return;);
874
875 if (lap->lap_state == LAP_STANDBY) {
876 /* Try to discover */
877 irlmp_do_lap_event(lap, LM_LAP_DISCOVERY_REQUEST,
878 NULL);
879 }
880 lap = (struct lap_cb *) hashbin_get_next(irlmp->links);
881 }
882}
883
884/*
885 * Function irlmp_discovery_request (nslots)
886 *
887 * Do a discovery of devices in front of the computer
888 *
889 * If the caller has registered a client discovery callback, this
890 * allow him to receive the full content of the discovery log through
891 * this callback (as normally he will receive only new discoveries).
892 */
893void irlmp_discovery_request(int nslots)
894{
895 /* Return current cached discovery log (in full) */
896 irlmp_discovery_confirm(irlmp->cachelog, DISCOVERY_LOG);
897
898 /*
899 * Start a single discovery operation if discovery is not already
900 * running
901 */
902 if (!sysctl_discovery) {
903 /* Check if user wants to override the default */
904 if (nslots == DISCOVERY_DEFAULT_SLOTS)
905 nslots = sysctl_discovery_slots;
906
907 irlmp_do_discovery(nslots);
908 /* Note : we never do expiry here. Expiry will run on the
909 * discovery timer regardless of the state of sysctl_discovery
910 * Jean II */
911 }
912}
913EXPORT_SYMBOL(irlmp_discovery_request);
914
915/*
916 * Function irlmp_get_discoveries (pn, mask, slots)
917 *
918 * Return the current discovery log
919 *
920 * If discovery is not enabled, you should call this function again
921 * after 1 or 2 seconds (i.e. after discovery has been done).
922 */
923struct irda_device_info *irlmp_get_discoveries(int *pn, __u16 mask, int nslots)
924{
925 /* If discovery is not enabled, it's likely that the discovery log
926 * will be empty. So, we trigger a single discovery, so that next
927 * time the user call us there might be some results in the log.
928 * Jean II
929 */
930 if (!sysctl_discovery) {
931 /* Check if user wants to override the default */
932 if (nslots == DISCOVERY_DEFAULT_SLOTS)
933 nslots = sysctl_discovery_slots;
934
935 /* Start discovery - will complete sometime later */
936 irlmp_do_discovery(nslots);
937 /* Note : we never do expiry here. Expiry will run on the
938 * discovery timer regardless of the state of sysctl_discovery
939 * Jean II */
940 }
941
942 /* Return current cached discovery log */
943 return(irlmp_copy_discoveries(irlmp->cachelog, pn, mask, TRUE));
944}
945EXPORT_SYMBOL(irlmp_get_discoveries);
946
947/*
948 * Function irlmp_notify_client (log)
949 *
950 * Notify all about discovered devices
951 *
952 * Clients registered with IrLMP are :
953 * o IrComm
954 * o IrLAN
955 * o Any socket (in any state - ouch, that may be a lot !)
956 * The client may have defined a callback to be notified in case of
957 * partial/selective discovery based on the hints that it passed to IrLMP.
958 */
959static inline void
960irlmp_notify_client(irlmp_client_t *client,
961 hashbin_t *log, DISCOVERY_MODE mode)
962{
963 discinfo_t *discoveries; /* Copy of the discovery log */
964 int number; /* Number of nodes in the log */
965 int i;
966
967 IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
968
969 /* Check if client wants or not partial/selective log (optimisation) */
970 if (!client->disco_callback)
971 return;
972
973 /*
974 * Locking notes :
975 * the old code was manipulating the log directly, which was
976 * very racy. Now, we use copy_discoveries, that protects
977 * itself while dumping the log for us.
978 * The overhead of the copy is compensated by the fact that
979 * we only pass new discoveries in normal mode and don't
980 * pass the same old entry every 3s to the caller as we used
981 * to do (virtual function calling is expensive).
982 * Jean II
983 */
984
985 /*
986 * Now, check all discovered devices (if any), and notify client
987 * only about the services that the client is interested in
988 * We also notify only about the new devices unless the caller
989 * explicitly request a dump of the log. Jean II
990 */
991 discoveries = irlmp_copy_discoveries(log, &number,
992 client->hint_mask.word,
993 (mode == DISCOVERY_LOG));
994 /* Check if the we got some results */
995 if (discoveries == NULL)
996 return; /* No nodes discovered */
997
998 /* Pass all entries to the listener */
999 for(i = 0; i < number; i++)
1000 client->disco_callback(&(discoveries[i]), mode, client->priv);
1001
1002 /* Free up our buffer */
1003 kfree(discoveries);
1004}
1005
1006/*
1007 * Function irlmp_discovery_confirm ( self, log)
1008 *
1009 * Some device(s) answered to our discovery request! Check to see which
1010 * device it is, and give indication to the client(s)
1011 *
1012 */
1013void irlmp_discovery_confirm(hashbin_t *log, DISCOVERY_MODE mode)
1014{
1015 irlmp_client_t *client;
1016 irlmp_client_t *client_next;
1017
1018 IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
1019
1020 IRDA_ASSERT(log != NULL, return;);
1021
1022 if (!(HASHBIN_GET_SIZE(log)))
1023 return;
1024
1025 /* For each client - notify callback may touch client list */
1026 client = (irlmp_client_t *) hashbin_get_first(irlmp->clients);
1027 while (NULL != hashbin_find_next(irlmp->clients, (long) client, NULL,
1028 (void *) &client_next) ) {
1029 /* Check if we should notify client */
1030 irlmp_notify_client(client, log, mode);
1031
1032 client = client_next;
1033 }
1034}
1035
1036/*
1037 * Function irlmp_discovery_expiry (expiry)
1038 *
1039 * This device is no longer been discovered, and therefore it is being
1040 * purged from the discovery log. Inform all clients who have
1041 * registered for this event...
1042 *
1043 * Note : called exclusively from discovery.c
1044 * Note : this is no longer called under discovery spinlock, so the
1045 * client can do whatever he wants in the callback.
1046 */
1047void irlmp_discovery_expiry(discinfo_t *expiries, int number)
1048{
1049 irlmp_client_t *client;
1050 irlmp_client_t *client_next;
1051 int i;
1052
1053 IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
1054
1055 IRDA_ASSERT(expiries != NULL, return;);
1056
1057 /* For each client - notify callback may touch client list */
1058 client = (irlmp_client_t *) hashbin_get_first(irlmp->clients);
1059 while (NULL != hashbin_find_next(irlmp->clients, (long) client, NULL,
1060 (void *) &client_next) ) {
1061
1062 /* Pass all entries to the listener */
1063 for(i = 0; i < number; i++) {
1064 /* Check if we should notify client */
1065 if ((client->expir_callback) &&
1066 (client->hint_mask.word & u16ho(expiries[i].hints)
1067 & 0x7f7f) )
1068 client->expir_callback(&(expiries[i]),
1069 EXPIRY_TIMEOUT,
1070 client->priv);
1071 }
1072
1073 /* Next client */
1074 client = client_next;
1075 }
1076}
1077
1078/*
1079 * Function irlmp_get_discovery_response ()
1080 *
1081 * Used by IrLAP to get the discovery info it needs when answering
1082 * discovery requests by other devices.
1083 */
1084discovery_t *irlmp_get_discovery_response(void)
1085{
1086 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
1087
1088 IRDA_ASSERT(irlmp != NULL, return NULL;);
1089
1090 u16ho(irlmp->discovery_rsp.data.hints) = irlmp->hints.word;
1091
1092 /*
1093 * Set character set for device name (we use ASCII), and
1094 * copy device name. Remember to make room for a \0 at the
1095 * end
1096 */
1097 irlmp->discovery_rsp.data.charset = CS_ASCII;
1098
1099 strncpy(irlmp->discovery_rsp.data.info, sysctl_devname,
1100 NICKNAME_MAX_LEN);
1101 irlmp->discovery_rsp.name_len = strlen(irlmp->discovery_rsp.data.info);
1102
1103 return &irlmp->discovery_rsp;
1104}
1105
1106/*
1107 * Function irlmp_data_request (self, skb)
1108 *
1109 * Send some data to peer device
1110 *
1111 * Note on skb management :
1112 * After calling the lower layers of the IrDA stack, we always
1113 * kfree() the skb, which drop the reference count (and potentially
1114 * destroy it).
1115 * IrLMP and IrLAP may queue the packet, and in those cases will need
1116 * to use skb_get() to keep it around.
1117 * Jean II
1118 */
1119int irlmp_data_request(struct lsap_cb *self, struct sk_buff *userdata)
1120{
1121 int ret;
1122
1123 IRDA_ASSERT(self != NULL, return -1;);
1124 IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return -1;);
1125
1126 /* Make room for MUX header */
1127 IRDA_ASSERT(skb_headroom(userdata) >= LMP_HEADER, return -1;);
1128 skb_push(userdata, LMP_HEADER);
1129
1130 ret = irlmp_do_lsap_event(self, LM_DATA_REQUEST, userdata);
1131
1132 /* Drop reference count - see irlap_data_request(). */
1133 dev_kfree_skb(userdata);
1134
1135 return ret;
1136}
1137EXPORT_SYMBOL(irlmp_data_request);
1138
1139/*
1140 * Function irlmp_data_indication (handle, skb)
1141 *
1142 * Got data from LAP layer so pass it up to upper layer
1143 *
1144 */
1145void irlmp_data_indication(struct lsap_cb *self, struct sk_buff *skb)
1146{
1147 /* Hide LMP header from layer above */
1148 skb_pull(skb, LMP_HEADER);
1149
1150 if (self->notify.data_indication) {
1151 /* Don't forget to refcount it - see irlap_driver_rcv(). */
1152 skb_get(skb);
1153 self->notify.data_indication(self->notify.instance, self, skb);
1154 }
1155}
1156
1157/*
1158 * Function irlmp_udata_request (self, skb)
1159 */
1160int irlmp_udata_request(struct lsap_cb *self, struct sk_buff *userdata)
1161{
1162 int ret;
1163
1164 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
1165
1166 IRDA_ASSERT(userdata != NULL, return -1;);
1167
1168 /* Make room for MUX header */
1169 IRDA_ASSERT(skb_headroom(userdata) >= LMP_HEADER, return -1;);
1170 skb_push(userdata, LMP_HEADER);
1171
1172 ret = irlmp_do_lsap_event(self, LM_UDATA_REQUEST, userdata);
1173
1174 /* Drop reference count - see irlap_data_request(). */
1175 dev_kfree_skb(userdata);
1176
1177 return ret;
1178}
1179
1180/*
1181 * Function irlmp_udata_indication (self, skb)
1182 *
1183 * Send unreliable data (but still within the connection)
1184 *
1185 */
1186void irlmp_udata_indication(struct lsap_cb *self, struct sk_buff *skb)
1187{
1188 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
1189
1190 IRDA_ASSERT(self != NULL, return;);
1191 IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return;);
1192 IRDA_ASSERT(skb != NULL, return;);
1193
1194 /* Hide LMP header from layer above */
1195 skb_pull(skb, LMP_HEADER);
1196
1197 if (self->notify.udata_indication) {
1198 /* Don't forget to refcount it - see irlap_driver_rcv(). */
1199 skb_get(skb);
1200 self->notify.udata_indication(self->notify.instance, self,
1201 skb);
1202 }
1203}
1204
1205/*
1206 * Function irlmp_connless_data_request (self, skb)
1207 */
1208#ifdef CONFIG_IRDA_ULTRA
1209int irlmp_connless_data_request(struct lsap_cb *self, struct sk_buff *userdata,
1210 __u8 pid)
1211{
1212 struct sk_buff *clone_skb;
1213 struct lap_cb *lap;
1214
1215 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
1216
1217 IRDA_ASSERT(userdata != NULL, return -1;);
1218
1219 /* Make room for MUX and PID header */
1220 IRDA_ASSERT(skb_headroom(userdata) >= LMP_HEADER+LMP_PID_HEADER,
1221 return -1;);
1222
1223 /* Insert protocol identifier */
1224 skb_push(userdata, LMP_PID_HEADER);
1225 if(self != NULL)
1226 userdata->data[0] = self->pid;
1227 else
1228 userdata->data[0] = pid;
1229
1230 /* Connectionless sockets must use 0x70 */
1231 skb_push(userdata, LMP_HEADER);
1232 userdata->data[0] = userdata->data[1] = LSAP_CONNLESS;
1233
1234 /* Try to send Connectionless packets out on all links */
1235 lap = (struct lap_cb *) hashbin_get_first(irlmp->links);
1236 while (lap != NULL) {
1237 IRDA_ASSERT(lap->magic == LMP_LAP_MAGIC, return -1;);
1238
1239 clone_skb = skb_clone(userdata, GFP_ATOMIC);
1240 if (!clone_skb) {
1241 dev_kfree_skb(userdata);
1242 return -ENOMEM;
1243 }
1244
1245 irlap_unitdata_request(lap->irlap, clone_skb);
1246 /* irlap_unitdata_request() don't increase refcount,
1247 * so no dev_kfree_skb() - Jean II */
1248
1249 lap = (struct lap_cb *) hashbin_get_next(irlmp->links);
1250 }
1251 dev_kfree_skb(userdata);
1252
1253 return 0;
1254}
1255#endif /* CONFIG_IRDA_ULTRA */
1256
1257/*
1258 * Function irlmp_connless_data_indication (self, skb)
1259 *
1260 * Receive unreliable data outside any connection. Mostly used by Ultra
1261 *
1262 */
1263#ifdef CONFIG_IRDA_ULTRA
1264void irlmp_connless_data_indication(struct lsap_cb *self, struct sk_buff *skb)
1265{
1266 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
1267
1268 IRDA_ASSERT(self != NULL, return;);
1269 IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return;);
1270 IRDA_ASSERT(skb != NULL, return;);
1271
1272 /* Hide LMP and PID header from layer above */
1273 skb_pull(skb, LMP_HEADER+LMP_PID_HEADER);
1274
1275 if (self->notify.udata_indication) {
1276 /* Don't forget to refcount it - see irlap_driver_rcv(). */
1277 skb_get(skb);
1278 self->notify.udata_indication(self->notify.instance, self,
1279 skb);
1280 }
1281}
1282#endif /* CONFIG_IRDA_ULTRA */
1283
1284/*
1285 * Propagate status indication from LAP to LSAPs (via LMP)
1286 * This don't trigger any change of state in lap_cb, lmp_cb or lsap_cb,
1287 * and the event is stateless, therefore we can bypass both state machines
1288 * and send the event direct to the LSAP user.
1289 * Jean II
1290 */
1291void irlmp_status_indication(struct lap_cb *self,
1292 LINK_STATUS link, LOCK_STATUS lock)
1293{
1294 struct lsap_cb *next;
1295 struct lsap_cb *curr;
1296
1297 /* Send status_indication to all LSAPs using this link */
1298 curr = (struct lsap_cb *) hashbin_get_first( self->lsaps);
1299 while (NULL != hashbin_find_next(self->lsaps, (long) curr, NULL,
1300 (void *) &next) ) {
1301 IRDA_ASSERT(curr->magic == LMP_LSAP_MAGIC, return;);
1302 /*
1303 * Inform service user if he has requested it
1304 */
1305 if (curr->notify.status_indication != NULL)
1306 curr->notify.status_indication(curr->notify.instance,
1307 link, lock);
1308 else
1309 IRDA_DEBUG(2, "%s(), no handler\n", __FUNCTION__);
1310
1311 curr = next;
1312 }
1313}
1314
1315/*
1316 * Receive flow control indication from LAP.
1317 * LAP want us to send it one more frame. We implement a simple round
1318 * robin scheduler between the active sockets so that we get a bit of
1319 * fairness. Note that the round robin is far from perfect, but it's
1320 * better than nothing.
1321 * We then poll the selected socket so that we can do synchronous
1322 * refilling of IrLAP (which allow to minimise the number of buffers).
1323 * Jean II
1324 */
1325void irlmp_flow_indication(struct lap_cb *self, LOCAL_FLOW flow)
1326{
1327 struct lsap_cb *next;
1328 struct lsap_cb *curr;
1329 int lsap_todo;
1330
1331 IRDA_ASSERT(self->magic == LMP_LAP_MAGIC, return;);
1332 IRDA_ASSERT(flow == FLOW_START, return;);
1333
1334 /* Get the number of lsap. That's the only safe way to know
1335 * that we have looped around... - Jean II */
1336 lsap_todo = HASHBIN_GET_SIZE(self->lsaps);
1337 IRDA_DEBUG(4, "%s() : %d lsaps to scan\n", __FUNCTION__, lsap_todo);
1338
1339 /* Poll lsap in order until the queue is full or until we
1340 * tried them all.
1341 * Most often, the current LSAP will have something to send,
1342 * so we will go through this loop only once. - Jean II */
1343 while((lsap_todo--) &&
1344 (IRLAP_GET_TX_QUEUE_LEN(self->irlap) < LAP_HIGH_THRESHOLD)) {
1345 /* Try to find the next lsap we should poll. */
1346 next = self->flow_next;
1347 /* If we have no lsap, restart from first one */
1348 if(next == NULL)
1349 next = (struct lsap_cb *) hashbin_get_first(self->lsaps);
1350 /* Verify current one and find the next one */
1351 curr = hashbin_find_next(self->lsaps, (long) next, NULL,
1352 (void *) &self->flow_next);
1353 /* Uh-oh... Paranoia */
1354 if(curr == NULL)
1355 break;
1356 IRDA_DEBUG(4, "%s() : curr is %p, next was %p and is now %p, still %d to go - queue len = %d\n", __FUNCTION__, curr, next, self->flow_next, lsap_todo, IRLAP_GET_TX_QUEUE_LEN(self->irlap));
1357
1358 /* Inform lsap user that it can send one more packet. */
1359 if (curr->notify.flow_indication != NULL)
1360 curr->notify.flow_indication(curr->notify.instance,
1361 curr, flow);
1362 else
1363 IRDA_DEBUG(1, "%s(), no handler\n", __FUNCTION__);
1364 }
1365}
1366
1367#if 0
1368/*
1369 * Function irlmp_hint_to_service (hint)
1370 *
1371 * Returns a list of all servics contained in the given hint bits. This
1372 * function assumes that the hint bits have the size of two bytes only
1373 */
1374__u8 *irlmp_hint_to_service(__u8 *hint)
1375{
1376 __u8 *service;
1377 int i = 0;
1378
1379 /*
1380 * Allocate array to store services in. 16 entries should be safe
1381 * since we currently only support 2 hint bytes
1382 */
1383 service = kmalloc(16, GFP_ATOMIC);
1384 if (!service) {
1385 IRDA_DEBUG(1, "%s(), Unable to kmalloc!\n", __FUNCTION__);
1386 return NULL;
1387 }
1388
1389 if (!hint[0]) {
1390 IRDA_DEBUG(1, "<None>\n");
1391 kfree(service);
1392 return NULL;
1393 }
1394 if (hint[0] & HINT_PNP)
1395 IRDA_DEBUG(1, "PnP Compatible ");
1396 if (hint[0] & HINT_PDA)
1397 IRDA_DEBUG(1, "PDA/Palmtop ");
1398 if (hint[0] & HINT_COMPUTER)
1399 IRDA_DEBUG(1, "Computer ");
1400 if (hint[0] & HINT_PRINTER) {
1401 IRDA_DEBUG(1, "Printer ");
1402 service[i++] = S_PRINTER;
1403 }
1404 if (hint[0] & HINT_MODEM)
1405 IRDA_DEBUG(1, "Modem ");
1406 if (hint[0] & HINT_FAX)
1407 IRDA_DEBUG(1, "Fax ");
1408 if (hint[0] & HINT_LAN) {
1409 IRDA_DEBUG(1, "LAN Access ");
1410 service[i++] = S_LAN;
1411 }
1412 /*
1413 * Test if extension byte exists. This byte will usually be
1414 * there, but this is not really required by the standard.
1415 * (IrLMP p. 29)
1416 */
1417 if (hint[0] & HINT_EXTENSION) {
1418 if (hint[1] & HINT_TELEPHONY) {
1419 IRDA_DEBUG(1, "Telephony ");
1420 service[i++] = S_TELEPHONY;
1421 } if (hint[1] & HINT_FILE_SERVER)
1422 IRDA_DEBUG(1, "File Server ");
1423
1424 if (hint[1] & HINT_COMM) {
1425 IRDA_DEBUG(1, "IrCOMM ");
1426 service[i++] = S_COMM;
1427 }
1428 if (hint[1] & HINT_OBEX) {
1429 IRDA_DEBUG(1, "IrOBEX ");
1430 service[i++] = S_OBEX;
1431 }
1432 }
1433 IRDA_DEBUG(1, "\n");
1434
1435 /* So that client can be notified about any discovery */
1436 service[i++] = S_ANY;
1437
1438 service[i] = S_END;
1439
1440 return service;
1441}
1442#endif
1443
1444static const __u16 service_hint_mapping[S_END][2] = {
1445 { HINT_PNP, 0 }, /* S_PNP */
1446 { HINT_PDA, 0 }, /* S_PDA */
1447 { HINT_COMPUTER, 0 }, /* S_COMPUTER */
1448 { HINT_PRINTER, 0 }, /* S_PRINTER */
1449 { HINT_MODEM, 0 }, /* S_MODEM */
1450 { HINT_FAX, 0 }, /* S_FAX */
1451 { HINT_LAN, 0 }, /* S_LAN */
1452 { HINT_EXTENSION, HINT_TELEPHONY }, /* S_TELEPHONY */
1453 { HINT_EXTENSION, HINT_COMM }, /* S_COMM */
1454 { HINT_EXTENSION, HINT_OBEX }, /* S_OBEX */
1455 { 0xFF, 0xFF }, /* S_ANY */
1456};
1457
1458/*
1459 * Function irlmp_service_to_hint (service)
1460 *
1461 * Converts a service type, to a hint bit
1462 *
1463 * Returns: a 16 bit hint value, with the service bit set
1464 */
1465__u16 irlmp_service_to_hint(int service)
1466{
1467 __u16_host_order hint;
1468
1469 hint.byte[0] = service_hint_mapping[service][0];
1470 hint.byte[1] = service_hint_mapping[service][1];
1471
1472 return hint.word;
1473}
1474EXPORT_SYMBOL(irlmp_service_to_hint);
1475
1476/*
1477 * Function irlmp_register_service (service)
1478 *
1479 * Register local service with IrLMP
1480 *
1481 */
1482void *irlmp_register_service(__u16 hints)
1483{
1484 irlmp_service_t *service;
1485
1486 IRDA_DEBUG(4, "%s(), hints = %04x\n", __FUNCTION__, hints);
1487
1488 /* Make a new registration */
1489 service = kmalloc(sizeof(irlmp_service_t), GFP_ATOMIC);
1490 if (!service) {
1491 IRDA_DEBUG(1, "%s(), Unable to kmalloc!\n", __FUNCTION__);
1492 return NULL;
1493 }
1494 service->hints.word = hints;
1495 hashbin_insert(irlmp->services, (irda_queue_t *) service,
1496 (long) service, NULL);
1497
1498 irlmp->hints.word |= hints;
1499
1500 return (void *)service;
1501}
1502EXPORT_SYMBOL(irlmp_register_service);
1503
1504/*
1505 * Function irlmp_unregister_service (handle)
1506 *
1507 * Unregister service with IrLMP.
1508 *
1509 * Returns: 0 on success, -1 on error
1510 */
1511int irlmp_unregister_service(void *handle)
1512{
1513 irlmp_service_t *service;
1514 unsigned long flags;
1515
1516 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
1517
1518 if (!handle)
1519 return -1;
1520
1521 /* Caller may call with invalid handle (it's legal) - Jean II */
1522 service = hashbin_lock_find(irlmp->services, (long) handle, NULL);
1523 if (!service) {
1524 IRDA_DEBUG(1, "%s(), Unknown service!\n", __FUNCTION__);
1525 return -1;
1526 }
1527
1528 hashbin_remove_this(irlmp->services, (irda_queue_t *) service);
1529 kfree(service);
1530
1531 /* Remove old hint bits */
1532 irlmp->hints.word = 0;
1533
1534 /* Refresh current hint bits */
1535 spin_lock_irqsave(&irlmp->services->hb_spinlock, flags);
1536 service = (irlmp_service_t *) hashbin_get_first(irlmp->services);
1537 while (service) {
1538 irlmp->hints.word |= service->hints.word;
1539
1540 service = (irlmp_service_t *)hashbin_get_next(irlmp->services);
1541 }
1542 spin_unlock_irqrestore(&irlmp->services->hb_spinlock, flags);
1543 return 0;
1544}
1545EXPORT_SYMBOL(irlmp_unregister_service);
1546
1547/*
1548 * Function irlmp_register_client (hint_mask, callback1, callback2)
1549 *
1550 * Register a local client with IrLMP
1551 * First callback is selective discovery (based on hints)
1552 * Second callback is for selective discovery expiries
1553 *
1554 * Returns: handle > 0 on success, 0 on error
1555 */
1556void *irlmp_register_client(__u16 hint_mask, DISCOVERY_CALLBACK1 disco_clb,
1557 DISCOVERY_CALLBACK2 expir_clb, void *priv)
1558{
1559 irlmp_client_t *client;
1560
1561 IRDA_DEBUG(1, "%s()\n", __FUNCTION__);
1562 IRDA_ASSERT(irlmp != NULL, return NULL;);
1563
1564 /* Make a new registration */
1565 client = kmalloc(sizeof(irlmp_client_t), GFP_ATOMIC);
1566 if (!client) {
1567 IRDA_DEBUG( 1, "%s(), Unable to kmalloc!\n", __FUNCTION__);
1568 return NULL;
1569 }
1570
1571 /* Register the details */
1572 client->hint_mask.word = hint_mask;
1573 client->disco_callback = disco_clb;
1574 client->expir_callback = expir_clb;
1575 client->priv = priv;
1576
1577 hashbin_insert(irlmp->clients, (irda_queue_t *) client,
1578 (long) client, NULL);
1579
1580 return (void *) client;
1581}
1582EXPORT_SYMBOL(irlmp_register_client);
1583
1584/*
1585 * Function irlmp_update_client (handle, hint_mask, callback1, callback2)
1586 *
1587 * Updates specified client (handle) with possibly new hint_mask and
1588 * callback
1589 *
1590 * Returns: 0 on success, -1 on error
1591 */
1592int irlmp_update_client(void *handle, __u16 hint_mask,
1593 DISCOVERY_CALLBACK1 disco_clb,
1594 DISCOVERY_CALLBACK2 expir_clb, void *priv)
1595{
1596 irlmp_client_t *client;
1597
1598 if (!handle)
1599 return -1;
1600
1601 client = hashbin_lock_find(irlmp->clients, (long) handle, NULL);
1602 if (!client) {
1603 IRDA_DEBUG(1, "%s(), Unknown client!\n", __FUNCTION__);
1604 return -1;
1605 }
1606
1607 client->hint_mask.word = hint_mask;
1608 client->disco_callback = disco_clb;
1609 client->expir_callback = expir_clb;
1610 client->priv = priv;
1611
1612 return 0;
1613}
1614EXPORT_SYMBOL(irlmp_update_client);
1615
1616/*
1617 * Function irlmp_unregister_client (handle)
1618 *
1619 * Returns: 0 on success, -1 on error
1620 *
1621 */
1622int irlmp_unregister_client(void *handle)
1623{
1624 struct irlmp_client *client;
1625
1626 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
1627
1628 if (!handle)
1629 return -1;
1630
1631 /* Caller may call with invalid handle (it's legal) - Jean II */
1632 client = hashbin_lock_find(irlmp->clients, (long) handle, NULL);
1633 if (!client) {
1634 IRDA_DEBUG(1, "%s(), Unknown client!\n", __FUNCTION__);
1635 return -1;
1636 }
1637
1638 IRDA_DEBUG(4, "%s(), removing client!\n", __FUNCTION__);
1639 hashbin_remove_this(irlmp->clients, (irda_queue_t *) client);
1640 kfree(client);
1641
1642 return 0;
1643}
1644EXPORT_SYMBOL(irlmp_unregister_client);
1645
1646/*
1647 * Function irlmp_slsap_inuse (slsap)
1648 *
1649 * Check if the given source LSAP selector is in use
1650 *
1651 * This function is clearly not very efficient. On the mitigating side, the
1652 * stack make sure that in 99% of the cases, we are called only once
1653 * for each socket allocation. We could probably keep a bitmap
1654 * of the allocated LSAP, but I'm not sure the complexity is worth it.
1655 * Jean II
1656 */
1657static int irlmp_slsap_inuse(__u8 slsap_sel)
1658{
1659 struct lsap_cb *self;
1660 struct lap_cb *lap;
1661 unsigned long flags;
1662
1663 IRDA_ASSERT(irlmp != NULL, return TRUE;);
1664 IRDA_ASSERT(irlmp->magic == LMP_MAGIC, return TRUE;);
1665 IRDA_ASSERT(slsap_sel != LSAP_ANY, return TRUE;);
1666
1667 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
1668
1669#ifdef CONFIG_IRDA_ULTRA
1670 /* Accept all bindings to the connectionless LSAP */
1671 if (slsap_sel == LSAP_CONNLESS)
1672 return FALSE;
1673#endif /* CONFIG_IRDA_ULTRA */
1674
1675 /* Valid values are between 0 and 127 (0x0-0x6F) */
1676 if (slsap_sel > LSAP_MAX)
1677 return TRUE;
1678
1679 /*
1680 * Check if slsap is already in use. To do this we have to loop over
1681 * every IrLAP connection and check every LSAP associated with each
1682 * the connection.
1683 */
1684 spin_lock_irqsave(&irlmp->links->hb_spinlock, flags);
1685 lap = (struct lap_cb *) hashbin_get_first(irlmp->links);
1686 while (lap != NULL) {
1687 IRDA_ASSERT(lap->magic == LMP_LAP_MAGIC, goto errlap;);
1688
1689 /* Careful for priority inversions here !
1690 * irlmp->links is never taken while another IrDA
1691 * spinlock is held, so we are safe. Jean II */
1692 spin_lock(&lap->lsaps->hb_spinlock);
1693
1694 /* For this IrLAP, check all the LSAPs */
1695 self = (struct lsap_cb *) hashbin_get_first(lap->lsaps);
1696 while (self != NULL) {
1697 IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC,
1698 goto errlsap;);
1699
1700 if ((self->slsap_sel == slsap_sel)) {
1701 IRDA_DEBUG(4, "Source LSAP selector=%02x in use\n",
1702 self->slsap_sel);
1703 goto errlsap;
1704 }
1705 self = (struct lsap_cb*) hashbin_get_next(lap->lsaps);
1706 }
1707 spin_unlock(&lap->lsaps->hb_spinlock);
1708
1709 /* Next LAP */
1710 lap = (struct lap_cb *) hashbin_get_next(irlmp->links);
1711 }
1712 spin_unlock_irqrestore(&irlmp->links->hb_spinlock, flags);
1713
1714 /*
1715 * Server sockets are typically waiting for connections and
1716 * therefore reside in the unconnected list. We don't want
1717 * to give out their LSAPs for obvious reasons...
1718 * Jean II
1719 */
1720 spin_lock_irqsave(&irlmp->unconnected_lsaps->hb_spinlock, flags);
1721
1722 self = (struct lsap_cb *) hashbin_get_first(irlmp->unconnected_lsaps);
1723 while (self != NULL) {
1724 IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, goto erruncon;);
1725 if ((self->slsap_sel == slsap_sel)) {
1726 IRDA_DEBUG(4, "Source LSAP selector=%02x in use (unconnected)\n",
1727 self->slsap_sel);
1728 goto erruncon;
1729 }
1730 self = (struct lsap_cb*) hashbin_get_next(irlmp->unconnected_lsaps);
1731 }
1732 spin_unlock_irqrestore(&irlmp->unconnected_lsaps->hb_spinlock, flags);
1733
1734 return FALSE;
1735
1736 /* Error exit from within one of the two nested loops.
1737 * Make sure we release the right spinlock in the righ order.
1738 * Jean II */
1739errlsap:
1740 spin_unlock(&lap->lsaps->hb_spinlock);
1741IRDA_ASSERT_LABEL(errlap:)
1742 spin_unlock_irqrestore(&irlmp->links->hb_spinlock, flags);
1743 return TRUE;
1744
1745 /* Error exit from within the unconnected loop.
1746 * Just one spinlock to release... Jean II */
1747erruncon:
1748 spin_unlock_irqrestore(&irlmp->unconnected_lsaps->hb_spinlock, flags);
1749 return TRUE;
1750}
1751
1752/*
1753 * Function irlmp_find_free_slsap ()
1754 *
1755 * Find a free source LSAP to use. This function is called if the service
1756 * user has requested a source LSAP equal to LM_ANY
1757 */
1758static __u8 irlmp_find_free_slsap(void)
1759{
1760 __u8 lsap_sel;
1761 int wrapped = 0;
1762
1763 IRDA_ASSERT(irlmp != NULL, return -1;);
1764 IRDA_ASSERT(irlmp->magic == LMP_MAGIC, return -1;);
1765
1766 /* Most users don't really care which LSAPs they are given,
1767 * and therefore we automatically give them a free LSAP.
1768 * This function try to find a suitable LSAP, i.e. which is
1769 * not in use and is within the acceptable range. Jean II */
1770
1771 do {
1772 /* Always increment to LSAP number before using it.
1773 * In theory, we could reuse the last LSAP number, as long
1774 * as it is no longer in use. Some IrDA stack do that.
1775 * However, the previous socket may be half closed, i.e.
1776 * we closed it, we think it's no longer in use, but the
1777 * other side did not receive our close and think it's
1778 * active and still send data on it.
1779 * This is similar to what is done with PIDs and TCP ports.
1780 * Also, this reduce the number of calls to irlmp_slsap_inuse()
1781 * which is an expensive function to call.
1782 * Jean II */
1783 irlmp->last_lsap_sel++;
1784
1785 /* Check if we need to wraparound (0x70-0x7f are reserved) */
1786 if (irlmp->last_lsap_sel > LSAP_MAX) {
1787 /* 0x00-0x10 are also reserved for well know ports */
1788 irlmp->last_lsap_sel = 0x10;
1789
1790 /* Make sure we terminate the loop */
1791 if (wrapped++) {
1792 IRDA_ERROR("%s: no more free LSAPs !\n",
1793 __FUNCTION__);
1794 return 0;
1795 }
1796 }
1797
1798 /* If the LSAP is in use, try the next one.
1799 * Despite the autoincrement, we need to check if the lsap
1800 * is really in use or not, first because LSAP may be
1801 * directly allocated in irlmp_open_lsap(), and also because
1802 * we may wraparound on old sockets. Jean II */
1803 } while (irlmp_slsap_inuse(irlmp->last_lsap_sel));
1804
1805 /* Got it ! */
1806 lsap_sel = irlmp->last_lsap_sel;
1807 IRDA_DEBUG(4, "%s(), found free lsap_sel=%02x\n",
1808 __FUNCTION__, lsap_sel);
1809
1810 return lsap_sel;
1811}
1812
1813/*
1814 * Function irlmp_convert_lap_reason (lap_reason)
1815 *
1816 * Converts IrLAP disconnect reason codes to IrLMP disconnect reason
1817 * codes
1818 *
1819 */
1820LM_REASON irlmp_convert_lap_reason( LAP_REASON lap_reason)
1821{
1822 int reason = LM_LAP_DISCONNECT;
1823
1824 switch (lap_reason) {
1825 case LAP_DISC_INDICATION: /* Received a disconnect request from peer */
1826 IRDA_DEBUG( 1, "%s(), LAP_DISC_INDICATION\n", __FUNCTION__);
1827 reason = LM_USER_REQUEST;
1828 break;
1829 case LAP_NO_RESPONSE: /* To many retransmits without response */
1830 IRDA_DEBUG( 1, "%s(), LAP_NO_RESPONSE\n", __FUNCTION__);
1831 reason = LM_LAP_DISCONNECT;
1832 break;
1833 case LAP_RESET_INDICATION:
1834 IRDA_DEBUG( 1, "%s(), LAP_RESET_INDICATION\n", __FUNCTION__);
1835 reason = LM_LAP_RESET;
1836 break;
1837 case LAP_FOUND_NONE:
1838 case LAP_MEDIA_BUSY:
1839 case LAP_PRIMARY_CONFLICT:
1840 IRDA_DEBUG(1, "%s(), LAP_FOUND_NONE, LAP_MEDIA_BUSY or LAP_PRIMARY_CONFLICT\n", __FUNCTION__);
1841 reason = LM_CONNECT_FAILURE;
1842 break;
1843 default:
1844 IRDA_DEBUG(1, "%s(), Unknow IrLAP disconnect reason %d!\n",
1845 __FUNCTION__, lap_reason);
1846 reason = LM_LAP_DISCONNECT;
1847 break;
1848 }
1849
1850 return reason;
1851}
1852
1853#ifdef CONFIG_PROC_FS
1854
1855struct irlmp_iter_state {
1856 hashbin_t *hashbin;
1857};
1858
1859#define LSAP_START_TOKEN ((void *)1)
1860#define LINK_START_TOKEN ((void *)2)
1861
1862static void *irlmp_seq_hb_idx(struct irlmp_iter_state *iter, loff_t *off)
1863{
1864 void *element;
1865
1866 spin_lock_irq(&iter->hashbin->hb_spinlock);
1867 for (element = hashbin_get_first(iter->hashbin);
1868 element != NULL;
1869 element = hashbin_get_next(iter->hashbin)) {
1870 if (!off || *off-- == 0) {
1871 /* NB: hashbin left locked */
1872 return element;
1873 }
1874 }
1875 spin_unlock_irq(&iter->hashbin->hb_spinlock);
1876 iter->hashbin = NULL;
1877 return NULL;
1878}
1879
1880
1881static void *irlmp_seq_start(struct seq_file *seq, loff_t *pos)
1882{
1883 struct irlmp_iter_state *iter = seq->private;
1884 void *v;
1885 loff_t off = *pos;
1886
1887 iter->hashbin = NULL;
1888 if (off-- == 0)
1889 return LSAP_START_TOKEN;
1890
1891 iter->hashbin = irlmp->unconnected_lsaps;
1892 v = irlmp_seq_hb_idx(iter, &off);
1893 if (v)
1894 return v;
1895
1896 if (off-- == 0)
1897 return LINK_START_TOKEN;
1898
1899 iter->hashbin = irlmp->links;
1900 return irlmp_seq_hb_idx(iter, &off);
1901}
1902
1903static void *irlmp_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1904{
1905 struct irlmp_iter_state *iter = seq->private;
1906
1907 ++*pos;
1908
1909 if (v == LSAP_START_TOKEN) { /* start of list of lsaps */
1910 iter->hashbin = irlmp->unconnected_lsaps;
1911 v = irlmp_seq_hb_idx(iter, NULL);
1912 return v ? v : LINK_START_TOKEN;
1913 }
1914
1915 if (v == LINK_START_TOKEN) { /* start of list of links */
1916 iter->hashbin = irlmp->links;
1917 return irlmp_seq_hb_idx(iter, NULL);
1918 }
1919
1920 v = hashbin_get_next(iter->hashbin);
1921
1922 if (v == NULL) { /* no more in this hash bin */
1923 spin_unlock_irq(&iter->hashbin->hb_spinlock);
1924
1925 if (iter->hashbin == irlmp->unconnected_lsaps)
1926 v = LINK_START_TOKEN;
1927
1928 iter->hashbin = NULL;
1929 }
1930 return v;
1931}
1932
1933static void irlmp_seq_stop(struct seq_file *seq, void *v)
1934{
1935 struct irlmp_iter_state *iter = seq->private;
1936
1937 if (iter->hashbin)
1938 spin_unlock_irq(&iter->hashbin->hb_spinlock);
1939}
1940
1941static int irlmp_seq_show(struct seq_file *seq, void *v)
1942{
1943 const struct irlmp_iter_state *iter = seq->private;
1944 struct lsap_cb *self = v;
1945
1946 if (v == LSAP_START_TOKEN)
1947 seq_puts(seq, "Unconnected LSAPs:\n");
1948 else if (v == LINK_START_TOKEN)
1949 seq_puts(seq, "\nRegistered Link Layers:\n");
1950 else if (iter->hashbin == irlmp->unconnected_lsaps) {
1951 self = v;
1952 IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC, return -EINVAL; );
1953 seq_printf(seq, "lsap state: %s, ",
1954 irlsap_state[ self->lsap_state]);
1955 seq_printf(seq,
1956 "slsap_sel: %#02x, dlsap_sel: %#02x, ",
1957 self->slsap_sel, self->dlsap_sel);
1958 seq_printf(seq, "(%s)", self->notify.name);
1959 seq_printf(seq, "\n");
1960 } else if (iter->hashbin == irlmp->links) {
1961 struct lap_cb *lap = v;
1962
1963 seq_printf(seq, "lap state: %s, ",
1964 irlmp_state[lap->lap_state]);
1965
1966 seq_printf(seq, "saddr: %#08x, daddr: %#08x, ",
1967 lap->saddr, lap->daddr);
1968 seq_printf(seq, "num lsaps: %d",
1969 HASHBIN_GET_SIZE(lap->lsaps));
1970 seq_printf(seq, "\n");
1971
1972 /* Careful for priority inversions here !
1973 * All other uses of attrib spinlock are independent of
1974 * the object spinlock, so we are safe. Jean II */
1975 spin_lock(&lap->lsaps->hb_spinlock);
1976
1977 seq_printf(seq, "\n Connected LSAPs:\n");
1978 for (self = (struct lsap_cb *) hashbin_get_first(lap->lsaps);
1979 self != NULL;
1980 self = (struct lsap_cb *)hashbin_get_next(lap->lsaps)) {
1981 IRDA_ASSERT(self->magic == LMP_LSAP_MAGIC,
1982 goto outloop;);
1983 seq_printf(seq, " lsap state: %s, ",
1984 irlsap_state[ self->lsap_state]);
1985 seq_printf(seq,
1986 "slsap_sel: %#02x, dlsap_sel: %#02x, ",
1987 self->slsap_sel, self->dlsap_sel);
1988 seq_printf(seq, "(%s)", self->notify.name);
1989 seq_putc(seq, '\n');
1990
1991 }
1992 IRDA_ASSERT_LABEL(outloop:)
1993 spin_unlock(&lap->lsaps->hb_spinlock);
1994 seq_putc(seq, '\n');
1995 } else
1996 return -EINVAL;
1997
1998 return 0;
1999}
2000
2001static struct seq_operations irlmp_seq_ops = {
2002 .start = irlmp_seq_start,
2003 .next = irlmp_seq_next,
2004 .stop = irlmp_seq_stop,
2005 .show = irlmp_seq_show,
2006};
2007
2008static int irlmp_seq_open(struct inode *inode, struct file *file)
2009{
2010 struct seq_file *seq;
2011 int rc = -ENOMEM;
2012 struct irlmp_iter_state *s;
2013
2014 IRDA_ASSERT(irlmp != NULL, return -EINVAL;);
2015
2016 s = kmalloc(sizeof(*s), GFP_KERNEL);
2017 if (!s)
2018 goto out;
2019
2020 rc = seq_open(file, &irlmp_seq_ops);
2021 if (rc)
2022 goto out_kfree;
2023
2024 seq = file->private_data;
2025 seq->private = s;
2026out:
2027 return rc;
2028out_kfree:
2029 kfree(s);
2030 goto out;
2031}
2032
2033struct file_operations irlmp_seq_fops = {
2034 .owner = THIS_MODULE,
2035 .open = irlmp_seq_open,
2036 .read = seq_read,
2037 .llseek = seq_lseek,
2038 .release = seq_release_private,
2039};
2040
2041#endif /* PROC_FS */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-24 22:32:18 -0500