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kbuild: ignore cache modifiers for generating the tags files
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / atm / lec.c
blob7eb1b21a0e9415d0730e4942d9bb129f88067b2a
1 /*
2 * lec.c: Lan Emulation driver
3 *
4 * Marko Kiiskila <mkiiskila@yahoo.com>
5 */
6
7 #include <linux/kernel.h>
8 #include <linux/bitops.h>
9 #include <linux/capability.h>
10
11 /* We are ethernet device */
12 #include <linux/if_ether.h>
13 #include <linux/netdevice.h>
14 #include <linux/etherdevice.h>
15 #include <net/sock.h>
16 #include <linux/skbuff.h>
17 #include <linux/ip.h>
18 #include <asm/byteorder.h>
19 #include <asm/uaccess.h>
20 #include <net/arp.h>
21 #include <net/dst.h>
22 #include <linux/proc_fs.h>
23 #include <linux/spinlock.h>
24 #include <linux/seq_file.h>
25
26 /* TokenRing if needed */
27 #ifdef CONFIG_TR
28 #include <linux/trdevice.h>
29 #endif
30
31 /* And atm device */
32 #include <linux/atmdev.h>
33 #include <linux/atmlec.h>
34
35 /* Proxy LEC knows about bridging */
36 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
37 #include <linux/if_bridge.h>
38 #include "../bridge/br_private.h"
39
40 static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 };
41 #endif
42
43 /* Modular too */
44 #include <linux/module.h>
45 #include <linux/init.h>
46
47 #include "lec.h"
48 #include "lec_arpc.h"
49 #include "resources.h"
50
51 #define DUMP_PACKETS 0 /*
52 * 0 = None,
53 * 1 = 30 first bytes
54 * 2 = Whole packet
55 */
56
57 #define LEC_UNRES_QUE_LEN 8 /*
58 * number of tx packets to queue for a
59 * single destination while waiting for SVC
60 */
61
62 static int lec_open(struct net_device *dev);
63 static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev);
64 static int lec_close(struct net_device *dev);
65 static struct net_device_stats *lec_get_stats(struct net_device *dev);
66 static void lec_init(struct net_device *dev);
67 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
68 unsigned char *mac_addr);
69 static int lec_arp_remove(struct lec_priv *priv,
70 struct lec_arp_table *to_remove);
71 /* LANE2 functions */
72 static void lane2_associate_ind(struct net_device *dev, u8 *mac_address,
73 u8 *tlvs, u32 sizeoftlvs);
74 static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force,
75 u8 **tlvs, u32 *sizeoftlvs);
76 static int lane2_associate_req(struct net_device *dev, u8 *lan_dst,
77 u8 *tlvs, u32 sizeoftlvs);
78
79 static int lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr,
80 unsigned long permanent);
81 static void lec_arp_check_empties(struct lec_priv *priv,
82 struct atm_vcc *vcc, struct sk_buff *skb);
83 static void lec_arp_destroy(struct lec_priv *priv);
84 static void lec_arp_init(struct lec_priv *priv);
85 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
86 unsigned char *mac_to_find,
87 int is_rdesc,
88 struct lec_arp_table **ret_entry);
89 static void lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr,
90 unsigned char *atm_addr, unsigned long remoteflag,
91 unsigned int targetless_le_arp);
92 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id);
93 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc);
94 static void lec_set_flush_tran_id(struct lec_priv *priv,
95 unsigned char *atm_addr,
96 unsigned long tran_id);
97 static void lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data,
98 struct atm_vcc *vcc,
99 void (*old_push) (struct atm_vcc *vcc,
100 struct sk_buff *skb));
101 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc);
102
103 /* must be done under lec_arp_lock */
104 static inline void lec_arp_hold(struct lec_arp_table *entry)
105 {
106 atomic_inc(&entry->usage);
107 }
108
109 static inline void lec_arp_put(struct lec_arp_table *entry)
110 {
111 if (atomic_dec_and_test(&entry->usage))
112 kfree(entry);
113 }
114
115
116 static struct lane2_ops lane2_ops = {
117 lane2_resolve, /* resolve, spec 3.1.3 */
118 lane2_associate_req, /* associate_req, spec 3.1.4 */
119 NULL /* associate indicator, spec 3.1.5 */
120 };
121
122 static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
123
124 /* Device structures */
125 static struct net_device *dev_lec[MAX_LEC_ITF];
126
127 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
128 static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev)
129 {
130 struct ethhdr *eth;
131 char *buff;
132 struct lec_priv *priv;
133
134 /*
135 * Check if this is a BPDU. If so, ask zeppelin to send
136 * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit
137 * as the Config BPDU has
138 */
139 eth = (struct ethhdr *)skb->data;
140 buff = skb->data + skb->dev->hard_header_len;
141 if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) {
142 struct sock *sk;
143 struct sk_buff *skb2;
144 struct atmlec_msg *mesg;
145
146 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
147 if (skb2 == NULL)
148 return;
149 skb2->len = sizeof(struct atmlec_msg);
150 mesg = (struct atmlec_msg *)skb2->data;
151 mesg->type = l_topology_change;
152 buff += 4;
153 mesg->content.normal.flag = *buff & 0x01; /* 0x01 is topology change */
154
155 priv = (struct lec_priv *)dev->priv;
156 atm_force_charge(priv->lecd, skb2->truesize);
157 sk = sk_atm(priv->lecd);
158 skb_queue_tail(&sk->sk_receive_queue, skb2);
159 sk->sk_data_ready(sk, skb2->len);
160 }
161
162 return;
163 }
164 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
165
166 /*
167 * Modelled after tr_type_trans
168 * All multicast and ARE or STE frames go to BUS.
169 * Non source routed frames go by destination address.
170 * Last hop source routed frames go by destination address.
171 * Not last hop source routed frames go by _next_ route descriptor.
172 * Returns pointer to destination MAC address or fills in rdesc
173 * and returns NULL.
174 */
175 #ifdef CONFIG_TR
176 static unsigned char *get_tr_dst(unsigned char *packet, unsigned char *rdesc)
177 {
178 struct trh_hdr *trh;
179 int riflen, num_rdsc;
180
181 trh = (struct trh_hdr *)packet;
182 if (trh->daddr[0] & (uint8_t) 0x80)
183 return bus_mac; /* multicast */
184
185 if (trh->saddr[0] & TR_RII) {
186 riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8;
187 if ((ntohs(trh->rcf) >> 13) != 0)
188 return bus_mac; /* ARE or STE */
189 } else
190 return trh->daddr; /* not source routed */
191
192 if (riflen < 6)
193 return trh->daddr; /* last hop, source routed */
194
195 /* riflen is 6 or more, packet has more than one route descriptor */
196 num_rdsc = (riflen / 2) - 1;
197 memset(rdesc, 0, ETH_ALEN);
198 /* offset 4 comes from LAN destination field in LE control frames */
199 if (trh->rcf & htons((uint16_t) TR_RCF_DIR_BIT))
200 memcpy(&rdesc[4], &trh->rseg[num_rdsc - 2], sizeof(__be16));
201 else {
202 memcpy(&rdesc[4], &trh->rseg[1], sizeof(__be16));
203 rdesc[5] = ((ntohs(trh->rseg[0]) & 0x000f) | (rdesc[5] & 0xf0));
204 }
205
206 return NULL;
207 }
208 #endif /* CONFIG_TR */
209
210 /*
211 * Open/initialize the netdevice. This is called (in the current kernel)
212 * sometime after booting when the 'ifconfig' program is run.
213 *
214 * This routine should set everything up anew at each open, even
215 * registers that "should" only need to be set once at boot, so that
216 * there is non-reboot way to recover if something goes wrong.
217 */
218
219 static int lec_open(struct net_device *dev)
220 {
221 struct lec_priv *priv = (struct lec_priv *)dev->priv;
222
223 netif_start_queue(dev);
224 memset(&priv->stats, 0, sizeof(struct net_device_stats));
225
226 return 0;
227 }
228
229 static __inline__ void
230 lec_send(struct atm_vcc *vcc, struct sk_buff *skb, struct lec_priv *priv)
231 {
232 ATM_SKB(skb)->vcc = vcc;
233 ATM_SKB(skb)->atm_options = vcc->atm_options;
234
235 atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
236 if (vcc->send(vcc, skb) < 0) {
237 priv->stats.tx_dropped++;
238 return;
239 }
240
241 priv->stats.tx_packets++;
242 priv->stats.tx_bytes += skb->len;
243 }
244
245 static void lec_tx_timeout(struct net_device *dev)
246 {
247 printk(KERN_INFO "%s: tx timeout\n", dev->name);
248 dev->trans_start = jiffies;
249 netif_wake_queue(dev);
250 }
251
252 static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev)
253 {
254 struct sk_buff *skb2;
255 struct lec_priv *priv = (struct lec_priv *)dev->priv;
256 struct lecdatahdr_8023 *lec_h;
257 struct atm_vcc *vcc;
258 struct lec_arp_table *entry;
259 unsigned char *dst;
260 int min_frame_size;
261 #ifdef CONFIG_TR
262 unsigned char rdesc[ETH_ALEN]; /* Token Ring route descriptor */
263 #endif
264 int is_rdesc;
265 #if DUMP_PACKETS > 0
266 char buf[300];
267 int i = 0;
268 #endif /* DUMP_PACKETS >0 */
269 DECLARE_MAC_BUF(mac);
270
271 pr_debug("lec_start_xmit called\n");
272 if (!priv->lecd) {
273 printk("%s:No lecd attached\n", dev->name);
274 priv->stats.tx_errors++;
275 netif_stop_queue(dev);
276 return -EUNATCH;
277 }
278
279 pr_debug("skbuff head:%lx data:%lx tail:%lx end:%lx\n",
280 (long)skb->head, (long)skb->data, (long)skb_tail_pointer(skb),
281 (long)skb_end_pointer(skb));
282 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
283 if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0)
284 lec_handle_bridge(skb, dev);
285 #endif
286
287 /* Make sure we have room for lec_id */
288 if (skb_headroom(skb) < 2) {
289
290 pr_debug("lec_start_xmit: reallocating skb\n");
291 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
292 kfree_skb(skb);
293 if (skb2 == NULL)
294 return 0;
295 skb = skb2;
296 }
297 skb_push(skb, 2);
298
299 /* Put le header to place, works for TokenRing too */
300 lec_h = (struct lecdatahdr_8023 *)skb->data;
301 lec_h->le_header = htons(priv->lecid);
302
303 #ifdef CONFIG_TR
304 /*
305 * Ugly. Use this to realign Token Ring packets for
306 * e.g. PCA-200E driver.
307 */
308 if (priv->is_trdev) {
309 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
310 kfree_skb(skb);
311 if (skb2 == NULL)
312 return 0;
313 skb = skb2;
314 }
315 #endif
316
317 #if DUMP_PACKETS > 0
318 printk("%s: send datalen:%ld lecid:%4.4x\n", dev->name,
319 skb->len, priv->lecid);
320 #if DUMP_PACKETS >= 2
321 for (i = 0; i < skb->len && i < 99; i++) {
322 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
323 }
324 #elif DUMP_PACKETS >= 1
325 for (i = 0; i < skb->len && i < 30; i++) {
326 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
327 }
328 #endif /* DUMP_PACKETS >= 1 */
329 if (i == skb->len)
330 printk("%s\n", buf);
331 else
332 printk("%s...\n", buf);
333 #endif /* DUMP_PACKETS > 0 */
334
335 /* Minimum ethernet-frame size */
336 #ifdef CONFIG_TR
337 if (priv->is_trdev)
338 min_frame_size = LEC_MINIMUM_8025_SIZE;
339 else
340 #endif
341 min_frame_size = LEC_MINIMUM_8023_SIZE;
342 if (skb->len < min_frame_size) {
343 if ((skb->len + skb_tailroom(skb)) < min_frame_size) {
344 skb2 = skb_copy_expand(skb, 0,
345 min_frame_size - skb->truesize,
346 GFP_ATOMIC);
347 dev_kfree_skb(skb);
348 if (skb2 == NULL) {
349 priv->stats.tx_dropped++;
350 return 0;
351 }
352 skb = skb2;
353 }
354 skb_put(skb, min_frame_size - skb->len);
355 }
356
357 /* Send to right vcc */
358 is_rdesc = 0;
359 dst = lec_h->h_dest;
360 #ifdef CONFIG_TR
361 if (priv->is_trdev) {
362 dst = get_tr_dst(skb->data + 2, rdesc);
363 if (dst == NULL) {
364 dst = rdesc;
365 is_rdesc = 1;
366 }
367 }
368 #endif
369 entry = NULL;
370 vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry);
371 pr_debug("%s:vcc:%p vcc_flags:%lx, entry:%p\n", dev->name,
372 vcc, vcc ? vcc->flags : 0, entry);
373 if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) {
374 if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) {
375 pr_debug("%s:lec_start_xmit: queuing packet, ",
376 dev->name);
377 pr_debug("MAC address %s\n",
378 print_mac(mac, lec_h->h_dest));
379 skb_queue_tail(&entry->tx_wait, skb);
380 } else {
381 pr_debug
382 ("%s:lec_start_xmit: tx queue full or no arp entry, dropping, ",
383 dev->name);
384 pr_debug("MAC address %s\n",
385 print_mac(mac, lec_h->h_dest));
386 priv->stats.tx_dropped++;
387 dev_kfree_skb(skb);
388 }
389 goto out;
390 }
391 #if DUMP_PACKETS > 0
392 printk("%s:sending to vpi:%d vci:%d\n", dev->name, vcc->vpi, vcc->vci);
393 #endif /* DUMP_PACKETS > 0 */
394
395 while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) {
396 pr_debug("lec.c: emptying tx queue, ");
397 pr_debug("MAC address %s\n",
398 print_mac(mac, lec_h->h_dest));
399 lec_send(vcc, skb2, priv);
400 }
401
402 lec_send(vcc, skb, priv);
403
404 if (!atm_may_send(vcc, 0)) {
405 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
406
407 vpriv->xoff = 1;
408 netif_stop_queue(dev);
409
410 /*
411 * vcc->pop() might have occurred in between, making
412 * the vcc usuable again. Since xmit is serialized,
413 * this is the only situation we have to re-test.
414 */
415
416 if (atm_may_send(vcc, 0))
417 netif_wake_queue(dev);
418 }
419
420 out:
421 if (entry)
422 lec_arp_put(entry);
423 dev->trans_start = jiffies;
424 return 0;
425 }
426
427 /* The inverse routine to net_open(). */
428 static int lec_close(struct net_device *dev)
429 {
430 netif_stop_queue(dev);
431 return 0;
432 }
433
434 /*
435 * Get the current statistics.
436 * This may be called with the card open or closed.
437 */
438 static struct net_device_stats *lec_get_stats(struct net_device *dev)
439 {
440 return &((struct lec_priv *)dev->priv)->stats;
441 }
442
443 static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
444 {
445 unsigned long flags;
446 struct net_device *dev = (struct net_device *)vcc->proto_data;
447 struct lec_priv *priv = (struct lec_priv *)dev->priv;
448 struct atmlec_msg *mesg;
449 struct lec_arp_table *entry;
450 int i;
451 char *tmp; /* FIXME */
452 DECLARE_MAC_BUF(mac);
453
454 atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
455 mesg = (struct atmlec_msg *)skb->data;
456 tmp = skb->data;
457 tmp += sizeof(struct atmlec_msg);
458 pr_debug("%s: msg from zeppelin:%d\n", dev->name, mesg->type);
459 switch (mesg->type) {
460 case l_set_mac_addr:
461 for (i = 0; i < 6; i++) {
462 dev->dev_addr[i] = mesg->content.normal.mac_addr[i];
463 }
464 break;
465 case l_del_mac_addr:
466 for (i = 0; i < 6; i++) {
467 dev->dev_addr[i] = 0;
468 }
469 break;
470 case l_addr_delete:
471 lec_addr_delete(priv, mesg->content.normal.atm_addr,
472 mesg->content.normal.flag);
473 break;
474 case l_topology_change:
475 priv->topology_change = mesg->content.normal.flag;
476 break;
477 case l_flush_complete:
478 lec_flush_complete(priv, mesg->content.normal.flag);
479 break;
480 case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */
481 spin_lock_irqsave(&priv->lec_arp_lock, flags);
482 entry = lec_arp_find(priv, mesg->content.normal.mac_addr);
483 lec_arp_remove(priv, entry);
484 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
485
486 if (mesg->content.normal.no_source_le_narp)
487 break;
488 /* FALL THROUGH */
489 case l_arp_update:
490 lec_arp_update(priv, mesg->content.normal.mac_addr,
491 mesg->content.normal.atm_addr,
492 mesg->content.normal.flag,
493 mesg->content.normal.targetless_le_arp);
494 pr_debug("lec: in l_arp_update\n");
495 if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */
496 pr_debug("lec: LANE2 3.1.5, got tlvs, size %d\n",
497 mesg->sizeoftlvs);
498 lane2_associate_ind(dev, mesg->content.normal.mac_addr,
499 tmp, mesg->sizeoftlvs);
500 }
501 break;
502 case l_config:
503 priv->maximum_unknown_frame_count =
504 mesg->content.config.maximum_unknown_frame_count;
505 priv->max_unknown_frame_time =
506 (mesg->content.config.max_unknown_frame_time * HZ);
507 priv->max_retry_count = mesg->content.config.max_retry_count;
508 priv->aging_time = (mesg->content.config.aging_time * HZ);
509 priv->forward_delay_time =
510 (mesg->content.config.forward_delay_time * HZ);
511 priv->arp_response_time =
512 (mesg->content.config.arp_response_time * HZ);
513 priv->flush_timeout = (mesg->content.config.flush_timeout * HZ);
514 priv->path_switching_delay =
515 (mesg->content.config.path_switching_delay * HZ);
516 priv->lane_version = mesg->content.config.lane_version; /* LANE2 */
517 priv->lane2_ops = NULL;
518 if (priv->lane_version > 1)
519 priv->lane2_ops = &lane2_ops;
520 if (dev->change_mtu(dev, mesg->content.config.mtu))
521 printk("%s: change_mtu to %d failed\n", dev->name,
522 mesg->content.config.mtu);
523 priv->is_proxy = mesg->content.config.is_proxy;
524 break;
525 case l_flush_tran_id:
526 lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr,
527 mesg->content.normal.flag);
528 break;
529 case l_set_lecid:
530 priv->lecid =
531 (unsigned short)(0xffff & mesg->content.normal.flag);
532 break;
533 case l_should_bridge:
534 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
535 {
536 struct net_bridge_fdb_entry *f;
537
538 pr_debug
539 ("%s: bridge zeppelin asks about %s\n",
540 dev->name,
541 print_mac(mac, mesg->content.proxy.mac_addr));
542
543 if (br_fdb_get_hook == NULL || dev->br_port == NULL)
544 break;
545
546 f = br_fdb_get_hook(dev->br_port->br,
547 mesg->content.proxy.mac_addr);
548 if (f != NULL && f->dst->dev != dev
549 && f->dst->state == BR_STATE_FORWARDING) {
550 /* hit from bridge table, send LE_ARP_RESPONSE */
551 struct sk_buff *skb2;
552 struct sock *sk;
553
554 pr_debug
555 ("%s: entry found, responding to zeppelin\n",
556 dev->name);
557 skb2 =
558 alloc_skb(sizeof(struct atmlec_msg),
559 GFP_ATOMIC);
560 if (skb2 == NULL) {
561 br_fdb_put_hook(f);
562 break;
563 }
564 skb2->len = sizeof(struct atmlec_msg);
565 skb_copy_to_linear_data(skb2, mesg,
566 sizeof(*mesg));
567 atm_force_charge(priv->lecd, skb2->truesize);
568 sk = sk_atm(priv->lecd);
569 skb_queue_tail(&sk->sk_receive_queue, skb2);
570 sk->sk_data_ready(sk, skb2->len);
571 }
572 if (f != NULL)
573 br_fdb_put_hook(f);
574 }
575 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
576 break;
577 default:
578 printk("%s: Unknown message type %d\n", dev->name, mesg->type);
579 dev_kfree_skb(skb);
580 return -EINVAL;
581 }
582 dev_kfree_skb(skb);
583 return 0;
584 }
585
586 static void lec_atm_close(struct atm_vcc *vcc)
587 {
588 struct sk_buff *skb;
589 struct net_device *dev = (struct net_device *)vcc->proto_data;
590 struct lec_priv *priv = (struct lec_priv *)dev->priv;
591
592 priv->lecd = NULL;
593 /* Do something needful? */
594
595 netif_stop_queue(dev);
596 lec_arp_destroy(priv);
597
598 if (skb_peek(&sk_atm(vcc)->sk_receive_queue))
599 printk("%s lec_atm_close: closing with messages pending\n",
600 dev->name);
601 while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue)) != NULL) {
602 atm_return(vcc, skb->truesize);
603 dev_kfree_skb(skb);
604 }
605
606 printk("%s: Shut down!\n", dev->name);
607 module_put(THIS_MODULE);
608 }
609
610 static struct atmdev_ops lecdev_ops = {
611 .close = lec_atm_close,
612 .send = lec_atm_send
613 };
614
615 static struct atm_dev lecatm_dev = {
616 .ops = &lecdev_ops,
617 .type = "lec",
618 .number = 999, /* dummy device number */
619 .lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock)
620 };
621
622 /*
623 * LANE2: new argument struct sk_buff *data contains
624 * the LE_ARP based TLVs introduced in the LANE2 spec
625 */
626 static int
627 send_to_lecd(struct lec_priv *priv, atmlec_msg_type type,
628 unsigned char *mac_addr, unsigned char *atm_addr,
629 struct sk_buff *data)
630 {
631 struct sock *sk;
632 struct sk_buff *skb;
633 struct atmlec_msg *mesg;
634
635 if (!priv || !priv->lecd) {
636 return -1;
637 }
638 skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
639 if (!skb)
640 return -1;
641 skb->len = sizeof(struct atmlec_msg);
642 mesg = (struct atmlec_msg *)skb->data;
643 memset(mesg, 0, sizeof(struct atmlec_msg));
644 mesg->type = type;
645 if (data != NULL)
646 mesg->sizeoftlvs = data->len;
647 if (mac_addr)
648 memcpy(&mesg->content.normal.mac_addr, mac_addr, ETH_ALEN);
649 else
650 mesg->content.normal.targetless_le_arp = 1;
651 if (atm_addr)
652 memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN);
653
654 atm_force_charge(priv->lecd, skb->truesize);
655 sk = sk_atm(priv->lecd);
656 skb_queue_tail(&sk->sk_receive_queue, skb);
657 sk->sk_data_ready(sk, skb->len);
658
659 if (data != NULL) {
660 pr_debug("lec: about to send %d bytes of data\n", data->len);
661 atm_force_charge(priv->lecd, data->truesize);
662 skb_queue_tail(&sk->sk_receive_queue, data);
663 sk->sk_data_ready(sk, skb->len);
664 }
665
666 return 0;
667 }
668
669 /* shamelessly stolen from drivers/net/net_init.c */
670 static int lec_change_mtu(struct net_device *dev, int new_mtu)
671 {
672 if ((new_mtu < 68) || (new_mtu > 18190))
673 return -EINVAL;
674 dev->mtu = new_mtu;
675 return 0;
676 }
677
678 static void lec_set_multicast_list(struct net_device *dev)
679 {
680 /*
681 * by default, all multicast frames arrive over the bus.
682 * eventually support selective multicast service
683 */
684 return;
685 }
686
687 static void lec_init(struct net_device *dev)
688 {
689 dev->change_mtu = lec_change_mtu;
690 dev->open = lec_open;
691 dev->stop = lec_close;
692 dev->hard_start_xmit = lec_start_xmit;
693 dev->tx_timeout = lec_tx_timeout;
694
695 dev->get_stats = lec_get_stats;
696 dev->set_multicast_list = lec_set_multicast_list;
697 dev->do_ioctl = NULL;
698 printk("%s: Initialized!\n", dev->name);
699 return;
700 }
701
702 static unsigned char lec_ctrl_magic[] = {
703 0xff,
704 0x00,
705 0x01,
706 0x01
707 };
708
709 #define LEC_DATA_DIRECT_8023 2
710 #define LEC_DATA_DIRECT_8025 3
711
712 static int lec_is_data_direct(struct atm_vcc *vcc)
713 {
714 return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) ||
715 (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025));
716 }
717
718 static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb)
719 {
720 unsigned long flags;
721 struct net_device *dev = (struct net_device *)vcc->proto_data;
722 struct lec_priv *priv = (struct lec_priv *)dev->priv;
723
724 #if DUMP_PACKETS >0
725 int i = 0;
726 char buf[300];
727
728 printk("%s: lec_push vcc vpi:%d vci:%d\n", dev->name,
729 vcc->vpi, vcc->vci);
730 #endif
731 if (!skb) {
732 pr_debug("%s: null skb\n", dev->name);
733 lec_vcc_close(priv, vcc);
734 return;
735 }
736 #if DUMP_PACKETS > 0
737 printk("%s: rcv datalen:%ld lecid:%4.4x\n", dev->name,
738 skb->len, priv->lecid);
739 #if DUMP_PACKETS >= 2
740 for (i = 0; i < skb->len && i < 99; i++) {
741 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
742 }
743 #elif DUMP_PACKETS >= 1
744 for (i = 0; i < skb->len && i < 30; i++) {
745 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
746 }
747 #endif /* DUMP_PACKETS >= 1 */
748 if (i == skb->len)
749 printk("%s\n", buf);
750 else
751 printk("%s...\n", buf);
752 #endif /* DUMP_PACKETS > 0 */
753 if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) { /* Control frame, to daemon */
754 struct sock *sk = sk_atm(vcc);
755
756 pr_debug("%s: To daemon\n", dev->name);
757 skb_queue_tail(&sk->sk_receive_queue, skb);
758 sk->sk_data_ready(sk, skb->len);
759 } else { /* Data frame, queue to protocol handlers */
760 struct lec_arp_table *entry;
761 unsigned char *src, *dst;
762
763 atm_return(vcc, skb->truesize);
764 if (*(__be16 *) skb->data == htons(priv->lecid) ||
765 !priv->lecd || !(dev->flags & IFF_UP)) {
766 /*
767 * Probably looping back, or if lecd is missing,
768 * lecd has gone down
769 */
770 pr_debug("Ignoring frame...\n");
771 dev_kfree_skb(skb);
772 return;
773 }
774 #ifdef CONFIG_TR
775 if (priv->is_trdev)
776 dst = ((struct lecdatahdr_8025 *)skb->data)->h_dest;
777 else
778 #endif
779 dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest;
780
781 /*
782 * If this is a Data Direct VCC, and the VCC does not match
783 * the LE_ARP cache entry, delete the LE_ARP cache entry.
784 */
785 spin_lock_irqsave(&priv->lec_arp_lock, flags);
786 if (lec_is_data_direct(vcc)) {
787 #ifdef CONFIG_TR
788 if (priv->is_trdev)
789 src =
790 ((struct lecdatahdr_8025 *)skb->data)->
791 h_source;
792 else
793 #endif
794 src =
795 ((struct lecdatahdr_8023 *)skb->data)->
796 h_source;
797 entry = lec_arp_find(priv, src);
798 if (entry && entry->vcc != vcc) {
799 lec_arp_remove(priv, entry);
800 lec_arp_put(entry);
801 }
802 }
803 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
804
805 if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */
806 !priv->is_proxy && /* Proxy wants all the packets */
807 memcmp(dst, dev->dev_addr, dev->addr_len)) {
808 dev_kfree_skb(skb);
809 return;
810 }
811 if (!hlist_empty(&priv->lec_arp_empty_ones)) {
812 lec_arp_check_empties(priv, vcc, skb);
813 }
814 skb_pull(skb, 2); /* skip lec_id */
815 #ifdef CONFIG_TR
816 if (priv->is_trdev)
817 skb->protocol = tr_type_trans(skb, dev);
818 else
819 #endif
820 skb->protocol = eth_type_trans(skb, dev);
821 priv->stats.rx_packets++;
822 priv->stats.rx_bytes += skb->len;
823 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
824 netif_rx(skb);
825 }
826 }
827
828 static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb)
829 {
830 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
831 struct net_device *dev = skb->dev;
832
833 if (vpriv == NULL) {
834 printk("lec_pop(): vpriv = NULL!?!?!?\n");
835 return;
836 }
837
838 vpriv->old_pop(vcc, skb);
839
840 if (vpriv->xoff && atm_may_send(vcc, 0)) {
841 vpriv->xoff = 0;
842 if (netif_running(dev) && netif_queue_stopped(dev))
843 netif_wake_queue(dev);
844 }
845 }
846
847 static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg)
848 {
849 struct lec_vcc_priv *vpriv;
850 int bytes_left;
851 struct atmlec_ioc ioc_data;
852
853 /* Lecd must be up in this case */
854 bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc));
855 if (bytes_left != 0) {
856 printk
857 ("lec: lec_vcc_attach, copy from user failed for %d bytes\n",
858 bytes_left);
859 }
860 if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF ||
861 !dev_lec[ioc_data.dev_num])
862 return -EINVAL;
863 if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL)))
864 return -ENOMEM;
865 vpriv->xoff = 0;
866 vpriv->old_pop = vcc->pop;
867 vcc->user_back = vpriv;
868 vcc->pop = lec_pop;
869 lec_vcc_added(dev_lec[ioc_data.dev_num]->priv,
870 &ioc_data, vcc, vcc->push);
871 vcc->proto_data = dev_lec[ioc_data.dev_num];
872 vcc->push = lec_push;
873 return 0;
874 }
875
876 static int lec_mcast_attach(struct atm_vcc *vcc, int arg)
877 {
878 if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg])
879 return -EINVAL;
880 vcc->proto_data = dev_lec[arg];
881 return (lec_mcast_make((struct lec_priv *)dev_lec[arg]->priv, vcc));
882 }
883
884 /* Initialize device. */
885 static int lecd_attach(struct atm_vcc *vcc, int arg)
886 {
887 int i;
888 struct lec_priv *priv;
889
890 if (arg < 0)
891 i = 0;
892 else
893 i = arg;
894 #ifdef CONFIG_TR
895 if (arg >= MAX_LEC_ITF)
896 return -EINVAL;
897 #else /* Reserve the top NUM_TR_DEVS for TR */
898 if (arg >= (MAX_LEC_ITF - NUM_TR_DEVS))
899 return -EINVAL;
900 #endif
901 if (!dev_lec[i]) {
902 int is_trdev, size;
903
904 is_trdev = 0;
905 if (i >= (MAX_LEC_ITF - NUM_TR_DEVS))
906 is_trdev = 1;
907
908 size = sizeof(struct lec_priv);
909 #ifdef CONFIG_TR
910 if (is_trdev)
911 dev_lec[i] = alloc_trdev(size);
912 else
913 #endif
914 dev_lec[i] = alloc_etherdev(size);
915 if (!dev_lec[i])
916 return -ENOMEM;
917 snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i);
918 if (register_netdev(dev_lec[i])) {
919 free_netdev(dev_lec[i]);
920 return -EINVAL;
921 }
922
923 priv = dev_lec[i]->priv;
924 priv->is_trdev = is_trdev;
925 lec_init(dev_lec[i]);
926 } else {
927 priv = dev_lec[i]->priv;
928 if (priv->lecd)
929 return -EADDRINUSE;
930 }
931 lec_arp_init(priv);
932 priv->itfnum = i; /* LANE2 addition */
933 priv->lecd = vcc;
934 vcc->dev = &lecatm_dev;
935 vcc_insert_socket(sk_atm(vcc));
936
937 vcc->proto_data = dev_lec[i];
938 set_bit(ATM_VF_META, &vcc->flags);
939 set_bit(ATM_VF_READY, &vcc->flags);
940
941 /* Set default values to these variables */
942 priv->maximum_unknown_frame_count = 1;
943 priv->max_unknown_frame_time = (1 * HZ);
944 priv->vcc_timeout_period = (1200 * HZ);
945 priv->max_retry_count = 1;
946 priv->aging_time = (300 * HZ);
947 priv->forward_delay_time = (15 * HZ);
948 priv->topology_change = 0;
949 priv->arp_response_time = (1 * HZ);
950 priv->flush_timeout = (4 * HZ);
951 priv->path_switching_delay = (6 * HZ);
952
953 if (dev_lec[i]->flags & IFF_UP) {
954 netif_start_queue(dev_lec[i]);
955 }
956 __module_get(THIS_MODULE);
957 return i;
958 }
959
960 #ifdef CONFIG_PROC_FS
961 static char *lec_arp_get_status_string(unsigned char status)
962 {
963 static char *lec_arp_status_string[] = {
964 "ESI_UNKNOWN ",
965 "ESI_ARP_PENDING ",
966 "ESI_VC_PENDING ",
967 "<Undefined> ",
968 "ESI_FLUSH_PENDING ",
969 "ESI_FORWARD_DIRECT"
970 };
971
972 if (status > ESI_FORWARD_DIRECT)
973 status = 3; /* ESI_UNDEFINED */
974 return lec_arp_status_string[status];
975 }
976
977 static void lec_info(struct seq_file *seq, struct lec_arp_table *entry)
978 {
979 int i;
980
981 for (i = 0; i < ETH_ALEN; i++)
982 seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff);
983 seq_printf(seq, " ");
984 for (i = 0; i < ATM_ESA_LEN; i++)
985 seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff);
986 seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status),
987 entry->flags & 0xffff);
988 if (entry->vcc)
989 seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci);
990 else
991 seq_printf(seq, " ");
992 if (entry->recv_vcc) {
993 seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi,
994 entry->recv_vcc->vci);
995 }
996 seq_putc(seq, '\n');
997 }
998
999 struct lec_state {
1000 unsigned long flags;
1001 struct lec_priv *locked;
1002 struct hlist_node *node;
1003 struct net_device *dev;
1004 int itf;
1005 int arp_table;
1006 int misc_table;
1007 };
1008
1009 static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl,
1010 loff_t *l)
1011 {
1012 struct hlist_node *e = state->node;
1013 struct lec_arp_table *tmp;
1014
1015 if (!e)
1016 e = tbl->first;
1017 if (e == (void *)1) {
1018 e = tbl->first;
1019 --*l;
1020 }
1021
1022 hlist_for_each_entry_from(tmp, e, next) {
1023 if (--*l < 0)
1024 break;
1025 }
1026 state->node = e;
1027
1028 return (*l < 0) ? state : NULL;
1029 }
1030
1031 static void *lec_arp_walk(struct lec_state *state, loff_t *l,
1032 struct lec_priv *priv)
1033 {
1034 void *v = NULL;
1035 int p;
1036
1037 for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) {
1038 v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l);
1039 if (v)
1040 break;
1041 }
1042 state->arp_table = p;
1043 return v;
1044 }
1045
1046 static void *lec_misc_walk(struct lec_state *state, loff_t *l,
1047 struct lec_priv *priv)
1048 {
1049 struct hlist_head *lec_misc_tables[] = {
1050 &priv->lec_arp_empty_ones,
1051 &priv->lec_no_forward,
1052 &priv->mcast_fwds
1053 };
1054 void *v = NULL;
1055 int q;
1056
1057 for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) {
1058 v = lec_tbl_walk(state, lec_misc_tables[q], l);
1059 if (v)
1060 break;
1061 }
1062 state->misc_table = q;
1063 return v;
1064 }
1065
1066 static void *lec_priv_walk(struct lec_state *state, loff_t *l,
1067 struct lec_priv *priv)
1068 {
1069 if (!state->locked) {
1070 state->locked = priv;
1071 spin_lock_irqsave(&priv->lec_arp_lock, state->flags);
1072 }
1073 if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) {
1074 spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags);
1075 state->locked = NULL;
1076 /* Partial state reset for the next time we get called */
1077 state->arp_table = state->misc_table = 0;
1078 }
1079 return state->locked;
1080 }
1081
1082 static void *lec_itf_walk(struct lec_state *state, loff_t *l)
1083 {
1084 struct net_device *dev;
1085 void *v;
1086
1087 dev = state->dev ? state->dev : dev_lec[state->itf];
1088 v = (dev && dev->priv) ? lec_priv_walk(state, l, dev->priv) : NULL;
1089 if (!v && dev) {
1090 dev_put(dev);
1091 /* Partial state reset for the next time we get called */
1092 dev = NULL;
1093 }
1094 state->dev = dev;
1095 return v;
1096 }
1097
1098 static void *lec_get_idx(struct lec_state *state, loff_t l)
1099 {
1100 void *v = NULL;
1101
1102 for (; state->itf < MAX_LEC_ITF; state->itf++) {
1103 v = lec_itf_walk(state, &l);
1104 if (v)
1105 break;
1106 }
1107 return v;
1108 }
1109
1110 static void *lec_seq_start(struct seq_file *seq, loff_t *pos)
1111 {
1112 struct lec_state *state = seq->private;
1113
1114 state->itf = 0;
1115 state->dev = NULL;
1116 state->locked = NULL;
1117 state->arp_table = 0;
1118 state->misc_table = 0;
1119 state->node = (void *)1;
1120
1121 return *pos ? lec_get_idx(state, *pos) : (void *)1;
1122 }
1123
1124 static void lec_seq_stop(struct seq_file *seq, void *v)
1125 {
1126 struct lec_state *state = seq->private;
1127
1128 if (state->dev) {
1129 spin_unlock_irqrestore(&state->locked->lec_arp_lock,
1130 state->flags);
1131 dev_put(state->dev);
1132 }
1133 }
1134
1135 static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1136 {
1137 struct lec_state *state = seq->private;
1138
1139 v = lec_get_idx(state, 1);
1140 *pos += !!PTR_ERR(v);
1141 return v;
1142 }
1143
1144 static int lec_seq_show(struct seq_file *seq, void *v)
1145 {
1146 static char lec_banner[] = "Itf MAC ATM destination"
1147 " Status Flags "
1148 "VPI/VCI Recv VPI/VCI\n";
1149
1150 if (v == (void *)1)
1151 seq_puts(seq, lec_banner);
1152 else {
1153 struct lec_state *state = seq->private;
1154 struct net_device *dev = state->dev;
1155 struct lec_arp_table *entry = hlist_entry(state->node, struct lec_arp_table, next);
1156
1157 seq_printf(seq, "%s ", dev->name);
1158 lec_info(seq, entry);
1159 }
1160 return 0;
1161 }
1162
1163 static const struct seq_operations lec_seq_ops = {
1164 .start = lec_seq_start,
1165 .next = lec_seq_next,
1166 .stop = lec_seq_stop,
1167 .show = lec_seq_show,
1168 };
1169
1170 static int lec_seq_open(struct inode *inode, struct file *file)
1171 {
1172 struct lec_state *state;
1173 struct seq_file *seq;
1174 int rc = -EAGAIN;
1175
1176 state = kmalloc(sizeof(*state), GFP_KERNEL);
1177 if (!state) {
1178 rc = -ENOMEM;
1179 goto out;
1180 }
1181
1182 rc = seq_open(file, &lec_seq_ops);
1183 if (rc)
1184 goto out_kfree;
1185 seq = file->private_data;
1186 seq->private = state;
1187 out:
1188 return rc;
1189
1190 out_kfree:
1191 kfree(state);
1192 goto out;
1193 }
1194
1195 static int lec_seq_release(struct inode *inode, struct file *file)
1196 {
1197 return seq_release_private(inode, file);
1198 }
1199
1200 static const struct file_operations lec_seq_fops = {
1201 .owner = THIS_MODULE,
1202 .open = lec_seq_open,
1203 .read = seq_read,
1204 .llseek = seq_lseek,
1205 .release = lec_seq_release,
1206 };
1207 #endif
1208
1209 static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1210 {
1211 struct atm_vcc *vcc = ATM_SD(sock);
1212 int err = 0;
1213
1214 switch (cmd) {
1215 case ATMLEC_CTRL:
1216 case ATMLEC_MCAST:
1217 case ATMLEC_DATA:
1218 if (!capable(CAP_NET_ADMIN))
1219 return -EPERM;
1220 break;
1221 default:
1222 return -ENOIOCTLCMD;
1223 }
1224
1225 switch (cmd) {
1226 case ATMLEC_CTRL:
1227 err = lecd_attach(vcc, (int)arg);
1228 if (err >= 0)
1229 sock->state = SS_CONNECTED;
1230 break;
1231 case ATMLEC_MCAST:
1232 err = lec_mcast_attach(vcc, (int)arg);
1233 break;
1234 case ATMLEC_DATA:
1235 err = lec_vcc_attach(vcc, (void __user *)arg);
1236 break;
1237 }
1238
1239 return err;
1240 }
1241
1242 static struct atm_ioctl lane_ioctl_ops = {
1243 .owner = THIS_MODULE,
1244 .ioctl = lane_ioctl,
1245 };
1246
1247 static int __init lane_module_init(void)
1248 {
1249 #ifdef CONFIG_PROC_FS
1250 struct proc_dir_entry *p;
1251
1252 p = create_proc_entry("lec", S_IRUGO, atm_proc_root);
1253 if (p)
1254 p->proc_fops = &lec_seq_fops;
1255 #endif
1256
1257 register_atm_ioctl(&lane_ioctl_ops);
1258 printk("lec.c: " __DATE__ " " __TIME__ " initialized\n");
1259 return 0;
1260 }
1261
1262 static void __exit lane_module_cleanup(void)
1263 {
1264 int i;
1265 struct lec_priv *priv;
1266
1267 remove_proc_entry("lec", atm_proc_root);
1268
1269 deregister_atm_ioctl(&lane_ioctl_ops);
1270
1271 for (i = 0; i < MAX_LEC_ITF; i++) {
1272 if (dev_lec[i] != NULL) {
1273 priv = (struct lec_priv *)dev_lec[i]->priv;
1274 unregister_netdev(dev_lec[i]);
1275 free_netdev(dev_lec[i]);
1276 dev_lec[i] = NULL;
1277 }
1278 }
1279
1280 return;
1281 }
1282
1283 module_init(lane_module_init);
1284 module_exit(lane_module_cleanup);
1285
1286 /*
1287 * LANE2: 3.1.3, LE_RESOLVE.request
1288 * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs.
1289 * If sizeoftlvs == NULL the default TLVs associated with with this
1290 * lec will be used.
1291 * If dst_mac == NULL, targetless LE_ARP will be sent
1292 */
1293 static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force,
1294 u8 **tlvs, u32 *sizeoftlvs)
1295 {
1296 unsigned long flags;
1297 struct lec_priv *priv = (struct lec_priv *)dev->priv;
1298 struct lec_arp_table *table;
1299 struct sk_buff *skb;
1300 int retval;
1301
1302 if (force == 0) {
1303 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1304 table = lec_arp_find(priv, dst_mac);
1305 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1306 if (table == NULL)
1307 return -1;
1308
1309 *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC);
1310 if (*tlvs == NULL)
1311 return -1;
1312
1313 *sizeoftlvs = table->sizeoftlvs;
1314
1315 return 0;
1316 }
1317
1318 if (sizeoftlvs == NULL)
1319 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL);
1320
1321 else {
1322 skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC);
1323 if (skb == NULL)
1324 return -1;
1325 skb->len = *sizeoftlvs;
1326 skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs);
1327 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb);
1328 }
1329 return retval;
1330 }
1331
1332 /*
1333 * LANE2: 3.1.4, LE_ASSOCIATE.request
1334 * Associate the *tlvs with the *lan_dst address.
1335 * Will overwrite any previous association
1336 * Returns 1 for success, 0 for failure (out of memory)
1337 *
1338 */
1339 static int lane2_associate_req(struct net_device *dev, u8 *lan_dst,
1340 u8 *tlvs, u32 sizeoftlvs)
1341 {
1342 int retval;
1343 struct sk_buff *skb;
1344 struct lec_priv *priv = (struct lec_priv *)dev->priv;
1345
1346 if (compare_ether_addr(lan_dst, dev->dev_addr))
1347 return (0); /* not our mac address */
1348
1349 kfree(priv->tlvs); /* NULL if there was no previous association */
1350
1351 priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1352 if (priv->tlvs == NULL)
1353 return (0);
1354 priv->sizeoftlvs = sizeoftlvs;
1355
1356 skb = alloc_skb(sizeoftlvs, GFP_ATOMIC);
1357 if (skb == NULL)
1358 return 0;
1359 skb->len = sizeoftlvs;
1360 skb_copy_to_linear_data(skb, tlvs, sizeoftlvs);
1361 retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb);
1362 if (retval != 0)
1363 printk("lec.c: lane2_associate_req() failed\n");
1364 /*
1365 * If the previous association has changed we must
1366 * somehow notify other LANE entities about the change
1367 */
1368 return (1);
1369 }
1370
1371 /*
1372 * LANE2: 3.1.5, LE_ASSOCIATE.indication
1373 *
1374 */
1375 static void lane2_associate_ind(struct net_device *dev, u8 *mac_addr,
1376 u8 *tlvs, u32 sizeoftlvs)
1377 {
1378 #if 0
1379 int i = 0;
1380 #endif
1381 struct lec_priv *priv = (struct lec_priv *)dev->priv;
1382 #if 0 /*
1383 * Why have the TLVs in LE_ARP entries
1384 * since we do not use them? When you
1385 * uncomment this code, make sure the
1386 * TLVs get freed when entry is killed
1387 */
1388 struct lec_arp_table *entry = lec_arp_find(priv, mac_addr);
1389
1390 if (entry == NULL)
1391 return; /* should not happen */
1392
1393 kfree(entry->tlvs);
1394
1395 entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1396 if (entry->tlvs == NULL)
1397 return;
1398 entry->sizeoftlvs = sizeoftlvs;
1399 #endif
1400 #if 0
1401 printk("lec.c: lane2_associate_ind()\n");
1402 printk("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs);
1403 while (i < sizeoftlvs)
1404 printk("%02x ", tlvs[i++]);
1405
1406 printk("\n");
1407 #endif
1408
1409 /* tell MPOA about the TLVs we saw */
1410 if (priv->lane2_ops && priv->lane2_ops->associate_indicator) {
1411 priv->lane2_ops->associate_indicator(dev, mac_addr,
1412 tlvs, sizeoftlvs);
1413 }
1414 return;
1415 }
1416
1417 /*
1418 * Here starts what used to lec_arpc.c
1419 *
1420 * lec_arpc.c was added here when making
1421 * lane client modular. October 1997
1422 */
1423
1424 #include <linux/types.h>
1425 #include <linux/timer.h>
1426 #include <asm/param.h>
1427 #include <asm/atomic.h>
1428 #include <linux/inetdevice.h>
1429 #include <net/route.h>
1430
1431 #if 0
1432 #define pr_debug(format,args...)
1433 /*
1434 #define pr_debug printk
1435 */
1436 #endif
1437 #define DEBUG_ARP_TABLE 0
1438
1439 #define LEC_ARP_REFRESH_INTERVAL (3*HZ)
1440
1441 static void lec_arp_check_expire(struct work_struct *work);
1442 static void lec_arp_expire_arp(unsigned long data);
1443
1444 /*
1445 * Arp table funcs
1446 */
1447
1448 #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE -1))
1449
1450 /*
1451 * Initialization of arp-cache
1452 */
1453 static void lec_arp_init(struct lec_priv *priv)
1454 {
1455 unsigned short i;
1456
1457 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1458 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1459 }
1460 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1461 INIT_HLIST_HEAD(&priv->lec_no_forward);
1462 INIT_HLIST_HEAD(&priv->mcast_fwds);
1463 spin_lock_init(&priv->lec_arp_lock);
1464 INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire);
1465 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1466 }
1467
1468 static void lec_arp_clear_vccs(struct lec_arp_table *entry)
1469 {
1470 if (entry->vcc) {
1471 struct atm_vcc *vcc = entry->vcc;
1472 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
1473 struct net_device *dev = (struct net_device *)vcc->proto_data;
1474
1475 vcc->pop = vpriv->old_pop;
1476 if (vpriv->xoff)
1477 netif_wake_queue(dev);
1478 kfree(vpriv);
1479 vcc->user_back = NULL;
1480 vcc->push = entry->old_push;
1481 vcc_release_async(vcc, -EPIPE);
1482 entry->vcc = NULL;
1483 }
1484 if (entry->recv_vcc) {
1485 entry->recv_vcc->push = entry->old_recv_push;
1486 vcc_release_async(entry->recv_vcc, -EPIPE);
1487 entry->recv_vcc = NULL;
1488 }
1489 }
1490
1491 /*
1492 * Insert entry to lec_arp_table
1493 * LANE2: Add to the end of the list to satisfy 8.1.13
1494 */
1495 static inline void
1496 lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry)
1497 {
1498 struct hlist_head *tmp;
1499
1500 tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])];
1501 hlist_add_head(&entry->next, tmp);
1502
1503 pr_debug("LEC_ARP: Added entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1504 0xff & entry->mac_addr[0], 0xff & entry->mac_addr[1],
1505 0xff & entry->mac_addr[2], 0xff & entry->mac_addr[3],
1506 0xff & entry->mac_addr[4], 0xff & entry->mac_addr[5]);
1507 }
1508
1509 /*
1510 * Remove entry from lec_arp_table
1511 */
1512 static int
1513 lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove)
1514 {
1515 struct hlist_node *node;
1516 struct lec_arp_table *entry;
1517 int i, remove_vcc = 1;
1518
1519 if (!to_remove) {
1520 return -1;
1521 }
1522
1523 hlist_del(&to_remove->next);
1524 del_timer(&to_remove->timer);
1525
1526 /* If this is the only MAC connected to this VCC, also tear down the VCC */
1527 if (to_remove->status >= ESI_FLUSH_PENDING) {
1528 /*
1529 * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT
1530 */
1531 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1532 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
1533 if (memcmp(to_remove->atm_addr,
1534 entry->atm_addr, ATM_ESA_LEN) == 0) {
1535 remove_vcc = 0;
1536 break;
1537 }
1538 }
1539 }
1540 if (remove_vcc)
1541 lec_arp_clear_vccs(to_remove);
1542 }
1543 skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */
1544
1545 pr_debug("LEC_ARP: Removed entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1546 0xff & to_remove->mac_addr[0], 0xff & to_remove->mac_addr[1],
1547 0xff & to_remove->mac_addr[2], 0xff & to_remove->mac_addr[3],
1548 0xff & to_remove->mac_addr[4], 0xff & to_remove->mac_addr[5]);
1549 return 0;
1550 }
1551
1552 #if DEBUG_ARP_TABLE
1553 static char *get_status_string(unsigned char st)
1554 {
1555 switch (st) {
1556 case ESI_UNKNOWN:
1557 return "ESI_UNKNOWN";
1558 case ESI_ARP_PENDING:
1559 return "ESI_ARP_PENDING";
1560 case ESI_VC_PENDING:
1561 return "ESI_VC_PENDING";
1562 case ESI_FLUSH_PENDING:
1563 return "ESI_FLUSH_PENDING";
1564 case ESI_FORWARD_DIRECT:
1565 return "ESI_FORWARD_DIRECT";
1566 default:
1567 return "<UNKNOWN>";
1568 }
1569 }
1570
1571 static void dump_arp_table(struct lec_priv *priv)
1572 {
1573 struct hlist_node *node;
1574 struct lec_arp_table *rulla;
1575 char buf[256];
1576 int i, j, offset;
1577
1578 printk("Dump %p:\n", priv);
1579 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1580 hlist_for_each_entry(rulla, node, &priv->lec_arp_tables[i], next) {
1581 offset = 0;
1582 offset += sprintf(buf, "%d: %p\n", i, rulla);
1583 offset += sprintf(buf + offset, "Mac:");
1584 for (j = 0; j < ETH_ALEN; j++) {
1585 offset += sprintf(buf + offset,
1586 "%2.2x ",
1587 rulla->mac_addr[j] & 0xff);
1588 }
1589 offset += sprintf(buf + offset, "Atm:");
1590 for (j = 0; j < ATM_ESA_LEN; j++) {
1591 offset += sprintf(buf + offset,
1592 "%2.2x ",
1593 rulla->atm_addr[j] & 0xff);
1594 }
1595 offset += sprintf(buf + offset,
1596 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1597 rulla->vcc ? rulla->vcc->vpi : 0,
1598 rulla->vcc ? rulla->vcc->vci : 0,
1599 rulla->recv_vcc ? rulla->recv_vcc->
1600 vpi : 0,
1601 rulla->recv_vcc ? rulla->recv_vcc->
1602 vci : 0, rulla->last_used,
1603 rulla->timestamp, rulla->no_tries);
1604 offset +=
1605 sprintf(buf + offset,
1606 "Flags:%x, Packets_flooded:%x, Status: %s ",
1607 rulla->flags, rulla->packets_flooded,
1608 get_status_string(rulla->status));
1609 printk("%s\n", buf);
1610 }
1611 }
1612
1613 if (!hlist_empty(&priv->lec_no_forward))
1614 printk("No forward\n");
1615 hlist_for_each_entry(rulla, node, &priv->lec_no_forward, next) {
1616 offset = 0;
1617 offset += sprintf(buf + offset, "Mac:");
1618 for (j = 0; j < ETH_ALEN; j++) {
1619 offset += sprintf(buf + offset, "%2.2x ",
1620 rulla->mac_addr[j] & 0xff);
1621 }
1622 offset += sprintf(buf + offset, "Atm:");
1623 for (j = 0; j < ATM_ESA_LEN; j++) {
1624 offset += sprintf(buf + offset, "%2.2x ",
1625 rulla->atm_addr[j] & 0xff);
1626 }
1627 offset += sprintf(buf + offset,
1628 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1629 rulla->vcc ? rulla->vcc->vpi : 0,
1630 rulla->vcc ? rulla->vcc->vci : 0,
1631 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1632 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1633 rulla->last_used,
1634 rulla->timestamp, rulla->no_tries);
1635 offset += sprintf(buf + offset,
1636 "Flags:%x, Packets_flooded:%x, Status: %s ",
1637 rulla->flags, rulla->packets_flooded,
1638 get_status_string(rulla->status));
1639 printk("%s\n", buf);
1640 }
1641
1642 if (!hlist_empty(&priv->lec_arp_empty_ones))
1643 printk("Empty ones\n");
1644 hlist_for_each_entry(rulla, node, &priv->lec_arp_empty_ones, next) {
1645 offset = 0;
1646 offset += sprintf(buf + offset, "Mac:");
1647 for (j = 0; j < ETH_ALEN; j++) {
1648 offset += sprintf(buf + offset, "%2.2x ",
1649 rulla->mac_addr[j] & 0xff);
1650 }
1651 offset += sprintf(buf + offset, "Atm:");
1652 for (j = 0; j < ATM_ESA_LEN; j++) {
1653 offset += sprintf(buf + offset, "%2.2x ",
1654 rulla->atm_addr[j] & 0xff);
1655 }
1656 offset += sprintf(buf + offset,
1657 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1658 rulla->vcc ? rulla->vcc->vpi : 0,
1659 rulla->vcc ? rulla->vcc->vci : 0,
1660 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1661 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1662 rulla->last_used,
1663 rulla->timestamp, rulla->no_tries);
1664 offset += sprintf(buf + offset,
1665 "Flags:%x, Packets_flooded:%x, Status: %s ",
1666 rulla->flags, rulla->packets_flooded,
1667 get_status_string(rulla->status));
1668 printk("%s", buf);
1669 }
1670
1671 if (!hlist_empty(&priv->mcast_fwds))
1672 printk("Multicast Forward VCCs\n");
1673 hlist_for_each_entry(rulla, node, &priv->mcast_fwds, next) {
1674 offset = 0;
1675 offset += sprintf(buf + offset, "Mac:");
1676 for (j = 0; j < ETH_ALEN; j++) {
1677 offset += sprintf(buf + offset, "%2.2x ",
1678 rulla->mac_addr[j] & 0xff);
1679 }
1680 offset += sprintf(buf + offset, "Atm:");
1681 for (j = 0; j < ATM_ESA_LEN; j++) {
1682 offset += sprintf(buf + offset, "%2.2x ",
1683 rulla->atm_addr[j] & 0xff);
1684 }
1685 offset += sprintf(buf + offset,
1686 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1687 rulla->vcc ? rulla->vcc->vpi : 0,
1688 rulla->vcc ? rulla->vcc->vci : 0,
1689 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1690 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1691 rulla->last_used,
1692 rulla->timestamp, rulla->no_tries);
1693 offset += sprintf(buf + offset,
1694 "Flags:%x, Packets_flooded:%x, Status: %s ",
1695 rulla->flags, rulla->packets_flooded,
1696 get_status_string(rulla->status));
1697 printk("%s\n", buf);
1698 }
1699
1700 }
1701 #else
1702 #define dump_arp_table(priv) do { } while (0)
1703 #endif
1704
1705 /*
1706 * Destruction of arp-cache
1707 */
1708 static void lec_arp_destroy(struct lec_priv *priv)
1709 {
1710 unsigned long flags;
1711 struct hlist_node *node, *next;
1712 struct lec_arp_table *entry;
1713 int i;
1714
1715 cancel_rearming_delayed_work(&priv->lec_arp_work);
1716
1717 /*
1718 * Remove all entries
1719 */
1720
1721 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1722 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1723 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
1724 lec_arp_remove(priv, entry);
1725 lec_arp_put(entry);
1726 }
1727 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1728 }
1729
1730 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
1731 del_timer_sync(&entry->timer);
1732 lec_arp_clear_vccs(entry);
1733 hlist_del(&entry->next);
1734 lec_arp_put(entry);
1735 }
1736 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1737
1738 hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) {
1739 del_timer_sync(&entry->timer);
1740 lec_arp_clear_vccs(entry);
1741 hlist_del(&entry->next);
1742 lec_arp_put(entry);
1743 }
1744 INIT_HLIST_HEAD(&priv->lec_no_forward);
1745
1746 hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) {
1747 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
1748 lec_arp_clear_vccs(entry);
1749 hlist_del(&entry->next);
1750 lec_arp_put(entry);
1751 }
1752 INIT_HLIST_HEAD(&priv->mcast_fwds);
1753 priv->mcast_vcc = NULL;
1754 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1755 }
1756
1757 /*
1758 * Find entry by mac_address
1759 */
1760 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
1761 unsigned char *mac_addr)
1762 {
1763 struct hlist_node *node;
1764 struct hlist_head *head;
1765 struct lec_arp_table *entry;
1766
1767 pr_debug("LEC_ARP: lec_arp_find :%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1768 mac_addr[0] & 0xff, mac_addr[1] & 0xff, mac_addr[2] & 0xff,
1769 mac_addr[3] & 0xff, mac_addr[4] & 0xff, mac_addr[5] & 0xff);
1770
1771 head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])];
1772 hlist_for_each_entry(entry, node, head, next) {
1773 if (!compare_ether_addr(mac_addr, entry->mac_addr)) {
1774 return entry;
1775 }
1776 }
1777 return NULL;
1778 }
1779
1780 static struct lec_arp_table *make_entry(struct lec_priv *priv,
1781 unsigned char *mac_addr)
1782 {
1783 struct lec_arp_table *to_return;
1784
1785 to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC);
1786 if (!to_return) {
1787 printk("LEC: Arp entry kmalloc failed\n");
1788 return NULL;
1789 }
1790 memcpy(to_return->mac_addr, mac_addr, ETH_ALEN);
1791 INIT_HLIST_NODE(&to_return->next);
1792 init_timer(&to_return->timer);
1793 to_return->timer.function = lec_arp_expire_arp;
1794 to_return->timer.data = (unsigned long)to_return;
1795 to_return->last_used = jiffies;
1796 to_return->priv = priv;
1797 skb_queue_head_init(&to_return->tx_wait);
1798 atomic_set(&to_return->usage, 1);
1799 return to_return;
1800 }
1801
1802 /* Arp sent timer expired */
1803 static void lec_arp_expire_arp(unsigned long data)
1804 {
1805 struct lec_arp_table *entry;
1806
1807 entry = (struct lec_arp_table *)data;
1808
1809 pr_debug("lec_arp_expire_arp\n");
1810 if (entry->status == ESI_ARP_PENDING) {
1811 if (entry->no_tries <= entry->priv->max_retry_count) {
1812 if (entry->is_rdesc)
1813 send_to_lecd(entry->priv, l_rdesc_arp_xmt,
1814 entry->mac_addr, NULL, NULL);
1815 else
1816 send_to_lecd(entry->priv, l_arp_xmt,
1817 entry->mac_addr, NULL, NULL);
1818 entry->no_tries++;
1819 }
1820 mod_timer(&entry->timer, jiffies + (1 * HZ));
1821 }
1822 }
1823
1824 /* Unknown/unused vcc expire, remove associated entry */
1825 static void lec_arp_expire_vcc(unsigned long data)
1826 {
1827 unsigned long flags;
1828 struct lec_arp_table *to_remove = (struct lec_arp_table *)data;
1829 struct lec_priv *priv = (struct lec_priv *)to_remove->priv;
1830
1831 del_timer(&to_remove->timer);
1832
1833 pr_debug("LEC_ARP %p %p: lec_arp_expire_vcc vpi:%d vci:%d\n",
1834 to_remove, priv,
1835 to_remove->vcc ? to_remove->recv_vcc->vpi : 0,
1836 to_remove->vcc ? to_remove->recv_vcc->vci : 0);
1837
1838 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1839 hlist_del(&to_remove->next);
1840 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1841
1842 lec_arp_clear_vccs(to_remove);
1843 lec_arp_put(to_remove);
1844 }
1845
1846 /*
1847 * Expire entries.
1848 * 1. Re-set timer
1849 * 2. For each entry, delete entries that have aged past the age limit.
1850 * 3. For each entry, depending on the status of the entry, perform
1851 * the following maintenance.
1852 * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the
1853 * tick_count is above the max_unknown_frame_time, clear
1854 * the tick_count to zero and clear the packets_flooded counter
1855 * to zero. This supports the packet rate limit per address
1856 * while flooding unknowns.
1857 * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater
1858 * than or equal to the path_switching_delay, change the status
1859 * to ESI_FORWARD_DIRECT. This causes the flush period to end
1860 * regardless of the progress of the flush protocol.
1861 */
1862 static void lec_arp_check_expire(struct work_struct *work)
1863 {
1864 unsigned long flags;
1865 struct lec_priv *priv =
1866 container_of(work, struct lec_priv, lec_arp_work.work);
1867 struct hlist_node *node, *next;
1868 struct lec_arp_table *entry;
1869 unsigned long now;
1870 unsigned long time_to_check;
1871 int i;
1872
1873 pr_debug("lec_arp_check_expire %p\n", priv);
1874 now = jiffies;
1875 restart:
1876 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1877 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1878 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
1879 if ((entry->flags) & LEC_REMOTE_FLAG &&
1880 priv->topology_change)
1881 time_to_check = priv->forward_delay_time;
1882 else
1883 time_to_check = priv->aging_time;
1884
1885 pr_debug("About to expire: %lx - %lx > %lx\n",
1886 now, entry->last_used, time_to_check);
1887 if (time_after(now, entry->last_used + time_to_check)
1888 && !(entry->flags & LEC_PERMANENT_FLAG)
1889 && !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */
1890 /* Remove entry */
1891 pr_debug("LEC:Entry timed out\n");
1892 lec_arp_remove(priv, entry);
1893 lec_arp_put(entry);
1894 } else {
1895 /* Something else */
1896 if ((entry->status == ESI_VC_PENDING ||
1897 entry->status == ESI_ARP_PENDING)
1898 && time_after_eq(now,
1899 entry->timestamp +
1900 priv->
1901 max_unknown_frame_time)) {
1902 entry->timestamp = jiffies;
1903 entry->packets_flooded = 0;
1904 if (entry->status == ESI_VC_PENDING)
1905 send_to_lecd(priv, l_svc_setup,
1906 entry->mac_addr,
1907 entry->atm_addr,
1908 NULL);
1909 }
1910 if (entry->status == ESI_FLUSH_PENDING
1911 &&
1912 time_after_eq(now, entry->timestamp +
1913 priv->path_switching_delay)) {
1914 struct sk_buff *skb;
1915 struct atm_vcc *vcc = entry->vcc;
1916
1917 lec_arp_hold(entry);
1918 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1919 while ((skb = skb_dequeue(&entry->tx_wait)) != NULL)
1920 lec_send(vcc, skb, entry->priv);
1921 entry->last_used = jiffies;
1922 entry->status = ESI_FORWARD_DIRECT;
1923 lec_arp_put(entry);
1924 goto restart;
1925 }
1926 }
1927 }
1928 }
1929 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1930
1931 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1932 }
1933
1934 /*
1935 * Try to find vcc where mac_address is attached.
1936 *
1937 */
1938 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
1939 unsigned char *mac_to_find, int is_rdesc,
1940 struct lec_arp_table **ret_entry)
1941 {
1942 unsigned long flags;
1943 struct lec_arp_table *entry;
1944 struct atm_vcc *found;
1945
1946 if (mac_to_find[0] & 0x01) {
1947 switch (priv->lane_version) {
1948 case 1:
1949 return priv->mcast_vcc;
1950 break;
1951 case 2: /* LANE2 wants arp for multicast addresses */
1952 if (!compare_ether_addr(mac_to_find, bus_mac))
1953 return priv->mcast_vcc;
1954 break;
1955 default:
1956 break;
1957 }
1958 }
1959
1960 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1961 entry = lec_arp_find(priv, mac_to_find);
1962
1963 if (entry) {
1964 if (entry->status == ESI_FORWARD_DIRECT) {
1965 /* Connection Ok */
1966 entry->last_used = jiffies;
1967 lec_arp_hold(entry);
1968 *ret_entry = entry;
1969 found = entry->vcc;
1970 goto out;
1971 }
1972 /*
1973 * If the LE_ARP cache entry is still pending, reset count to 0
1974 * so another LE_ARP request can be made for this frame.
1975 */
1976 if (entry->status == ESI_ARP_PENDING) {
1977 entry->no_tries = 0;
1978 }
1979 /*
1980 * Data direct VC not yet set up, check to see if the unknown
1981 * frame count is greater than the limit. If the limit has
1982 * not been reached, allow the caller to send packet to
1983 * BUS.
1984 */
1985 if (entry->status != ESI_FLUSH_PENDING &&
1986 entry->packets_flooded <
1987 priv->maximum_unknown_frame_count) {
1988 entry->packets_flooded++;
1989 pr_debug("LEC_ARP: Flooding..\n");
1990 found = priv->mcast_vcc;
1991 goto out;
1992 }
1993 /*
1994 * We got here because entry->status == ESI_FLUSH_PENDING
1995 * or BUS flood limit was reached for an entry which is
1996 * in ESI_ARP_PENDING or ESI_VC_PENDING state.
1997 */
1998 lec_arp_hold(entry);
1999 *ret_entry = entry;
2000 pr_debug("lec: entry->status %d entry->vcc %p\n", entry->status,
2001 entry->vcc);
2002 found = NULL;
2003 } else {
2004 /* No matching entry was found */
2005 entry = make_entry(priv, mac_to_find);
2006 pr_debug("LEC_ARP: Making entry\n");
2007 if (!entry) {
2008 found = priv->mcast_vcc;
2009 goto out;
2010 }
2011 lec_arp_add(priv, entry);
2012 /* We want arp-request(s) to be sent */
2013 entry->packets_flooded = 1;
2014 entry->status = ESI_ARP_PENDING;
2015 entry->no_tries = 1;
2016 entry->last_used = entry->timestamp = jiffies;
2017 entry->is_rdesc = is_rdesc;
2018 if (entry->is_rdesc)
2019 send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL,
2020 NULL);
2021 else
2022 send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL);
2023 entry->timer.expires = jiffies + (1 * HZ);
2024 entry->timer.function = lec_arp_expire_arp;
2025 add_timer(&entry->timer);
2026 found = priv->mcast_vcc;
2027 }
2028
2029 out:
2030 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2031 return found;
2032 }
2033
2034 static int
2035 lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr,
2036 unsigned long permanent)
2037 {
2038 unsigned long flags;
2039 struct hlist_node *node, *next;
2040 struct lec_arp_table *entry;
2041 int i;
2042
2043 pr_debug("lec_addr_delete\n");
2044 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2045 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2046 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
2047 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)
2048 && (permanent ||
2049 !(entry->flags & LEC_PERMANENT_FLAG))) {
2050 lec_arp_remove(priv, entry);
2051 lec_arp_put(entry);
2052 }
2053 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2054 return 0;
2055 }
2056 }
2057 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2058 return -1;
2059 }
2060
2061 /*
2062 * Notifies: Response to arp_request (atm_addr != NULL)
2063 */
2064 static void
2065 lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr,
2066 unsigned char *atm_addr, unsigned long remoteflag,
2067 unsigned int targetless_le_arp)
2068 {
2069 unsigned long flags;
2070 struct hlist_node *node, *next;
2071 struct lec_arp_table *entry, *tmp;
2072 int i;
2073
2074 pr_debug("lec:%s", (targetless_le_arp) ? "targetless " : " ");
2075 pr_debug("lec_arp_update mac:%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
2076 mac_addr[0], mac_addr[1], mac_addr[2], mac_addr[3],
2077 mac_addr[4], mac_addr[5]);
2078
2079 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2080 entry = lec_arp_find(priv, mac_addr);
2081 if (entry == NULL && targetless_le_arp)
2082 goto out; /*
2083 * LANE2: ignore targetless LE_ARPs for which
2084 * we have no entry in the cache. 7.1.30
2085 */
2086 if (!hlist_empty(&priv->lec_arp_empty_ones)) {
2087 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2088 if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) {
2089 hlist_del(&entry->next);
2090 del_timer(&entry->timer);
2091 tmp = lec_arp_find(priv, mac_addr);
2092 if (tmp) {
2093 del_timer(&tmp->timer);
2094 tmp->status = ESI_FORWARD_DIRECT;
2095 memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN);
2096 tmp->vcc = entry->vcc;
2097 tmp->old_push = entry->old_push;
2098 tmp->last_used = jiffies;
2099 del_timer(&entry->timer);
2100 lec_arp_put(entry);
2101 entry = tmp;
2102 } else {
2103 entry->status = ESI_FORWARD_DIRECT;
2104 memcpy(entry->mac_addr, mac_addr, ETH_ALEN);
2105 entry->last_used = jiffies;
2106 lec_arp_add(priv, entry);
2107 }
2108 if (remoteflag)
2109 entry->flags |= LEC_REMOTE_FLAG;
2110 else
2111 entry->flags &= ~LEC_REMOTE_FLAG;
2112 pr_debug("After update\n");
2113 dump_arp_table(priv);
2114 goto out;
2115 }
2116 }
2117 }
2118
2119 entry = lec_arp_find(priv, mac_addr);
2120 if (!entry) {
2121 entry = make_entry(priv, mac_addr);
2122 if (!entry)
2123 goto out;
2124 entry->status = ESI_UNKNOWN;
2125 lec_arp_add(priv, entry);
2126 /* Temporary, changes before end of function */
2127 }
2128 memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN);
2129 del_timer(&entry->timer);
2130 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2131 hlist_for_each_entry(tmp, node, &priv->lec_arp_tables[i], next) {
2132 if (entry != tmp &&
2133 !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) {
2134 /* Vcc to this host exists */
2135 if (tmp->status > ESI_VC_PENDING) {
2136 /*
2137 * ESI_FLUSH_PENDING,
2138 * ESI_FORWARD_DIRECT
2139 */
2140 entry->vcc = tmp->vcc;
2141 entry->old_push = tmp->old_push;
2142 }
2143 entry->status = tmp->status;
2144 break;
2145 }
2146 }
2147 }
2148 if (remoteflag)
2149 entry->flags |= LEC_REMOTE_FLAG;
2150 else
2151 entry->flags &= ~LEC_REMOTE_FLAG;
2152 if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) {
2153 entry->status = ESI_VC_PENDING;
2154 send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL);
2155 }
2156 pr_debug("After update2\n");
2157 dump_arp_table(priv);
2158 out:
2159 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2160 }
2161
2162 /*
2163 * Notifies: Vcc setup ready
2164 */
2165 static void
2166 lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data,
2167 struct atm_vcc *vcc,
2168 void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb))
2169 {
2170 unsigned long flags;
2171 struct hlist_node *node;
2172 struct lec_arp_table *entry;
2173 int i, found_entry = 0;
2174
2175 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2176 if (ioc_data->receive == 2) {
2177 /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */
2178
2179 pr_debug("LEC_ARP: Attaching mcast forward\n");
2180 #if 0
2181 entry = lec_arp_find(priv, bus_mac);
2182 if (!entry) {
2183 printk("LEC_ARP: Multicast entry not found!\n");
2184 goto out;
2185 }
2186 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2187 entry->recv_vcc = vcc;
2188 entry->old_recv_push = old_push;
2189 #endif
2190 entry = make_entry(priv, bus_mac);
2191 if (entry == NULL)
2192 goto out;
2193 del_timer(&entry->timer);
2194 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2195 entry->recv_vcc = vcc;
2196 entry->old_recv_push = old_push;
2197 hlist_add_head(&entry->next, &priv->mcast_fwds);
2198 goto out;
2199 } else if (ioc_data->receive == 1) {
2200 /*
2201 * Vcc which we don't want to make default vcc,
2202 * attach it anyway.
2203 */
2204 pr_debug
2205 ("LEC_ARP:Attaching data direct, not default: "
2206 "%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
2207 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2208 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2209 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2210 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2211 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2212 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2213 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2214 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2215 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2216 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2217 entry = make_entry(priv, bus_mac);
2218 if (entry == NULL)
2219 goto out;
2220 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2221 memset(entry->mac_addr, 0, ETH_ALEN);
2222 entry->recv_vcc = vcc;
2223 entry->old_recv_push = old_push;
2224 entry->status = ESI_UNKNOWN;
2225 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2226 entry->timer.function = lec_arp_expire_vcc;
2227 hlist_add_head(&entry->next, &priv->lec_no_forward);
2228 add_timer(&entry->timer);
2229 dump_arp_table(priv);
2230 goto out;
2231 }
2232 pr_debug
2233 ("LEC_ARP:Attaching data direct, default: "
2234 "%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
2235 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2236 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2237 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2238 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2239 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2240 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2241 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2242 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2243 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2244 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2245 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2246 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2247 if (memcmp
2248 (ioc_data->atm_addr, entry->atm_addr,
2249 ATM_ESA_LEN) == 0) {
2250 pr_debug("LEC_ARP: Attaching data direct\n");
2251 pr_debug("Currently -> Vcc: %d, Rvcc:%d\n",
2252 entry->vcc ? entry->vcc->vci : 0,
2253 entry->recv_vcc ? entry->recv_vcc->
2254 vci : 0);
2255 found_entry = 1;
2256 del_timer(&entry->timer);
2257 entry->vcc = vcc;
2258 entry->old_push = old_push;
2259 if (entry->status == ESI_VC_PENDING) {
2260 if (priv->maximum_unknown_frame_count
2261 == 0)
2262 entry->status =
2263 ESI_FORWARD_DIRECT;
2264 else {
2265 entry->timestamp = jiffies;
2266 entry->status =
2267 ESI_FLUSH_PENDING;
2268 #if 0
2269 send_to_lecd(priv, l_flush_xmt,
2270 NULL,
2271 entry->atm_addr,
2272 NULL);
2273 #endif
2274 }
2275 } else {
2276 /*
2277 * They were forming a connection
2278 * to us, and we to them. Our
2279 * ATM address is numerically lower
2280 * than theirs, so we make connection
2281 * we formed into default VCC (8.1.11).
2282 * Connection they made gets torn
2283 * down. This might confuse some
2284 * clients. Can be changed if
2285 * someone reports trouble...
2286 */
2287 ;
2288 }
2289 }
2290 }
2291 }
2292 if (found_entry) {
2293 pr_debug("After vcc was added\n");
2294 dump_arp_table(priv);
2295 goto out;
2296 }
2297 /*
2298 * Not found, snatch address from first data packet that arrives
2299 * from this vcc
2300 */
2301 entry = make_entry(priv, bus_mac);
2302 if (!entry)
2303 goto out;
2304 entry->vcc = vcc;
2305 entry->old_push = old_push;
2306 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2307 memset(entry->mac_addr, 0, ETH_ALEN);
2308 entry->status = ESI_UNKNOWN;
2309 hlist_add_head(&entry->next, &priv->lec_arp_empty_ones);
2310 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2311 entry->timer.function = lec_arp_expire_vcc;
2312 add_timer(&entry->timer);
2313 pr_debug("After vcc was added\n");
2314 dump_arp_table(priv);
2315 out:
2316 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2317 }
2318
2319 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id)
2320 {
2321 unsigned long flags;
2322 struct hlist_node *node;
2323 struct lec_arp_table *entry;
2324 int i;
2325
2326 pr_debug("LEC:lec_flush_complete %lx\n", tran_id);
2327 restart:
2328 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2329 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2330 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2331 if (entry->flush_tran_id == tran_id
2332 && entry->status == ESI_FLUSH_PENDING) {
2333 struct sk_buff *skb;
2334 struct atm_vcc *vcc = entry->vcc;
2335
2336 lec_arp_hold(entry);
2337 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2338 while ((skb = skb_dequeue(&entry->tx_wait)) != NULL)
2339 lec_send(vcc, skb, entry->priv);
2340 entry->last_used = jiffies;
2341 entry->status = ESI_FORWARD_DIRECT;
2342 lec_arp_put(entry);
2343 pr_debug("LEC_ARP: Flushed\n");
2344 goto restart;
2345 }
2346 }
2347 }
2348 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2349 dump_arp_table(priv);
2350 }
2351
2352 static void
2353 lec_set_flush_tran_id(struct lec_priv *priv,
2354 unsigned char *atm_addr, unsigned long tran_id)
2355 {
2356 unsigned long flags;
2357 struct hlist_node *node;
2358 struct lec_arp_table *entry;
2359 int i;
2360
2361 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2362 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
2363 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2364 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) {
2365 entry->flush_tran_id = tran_id;
2366 pr_debug("Set flush transaction id to %lx for %p\n",
2367 tran_id, entry);
2368 }
2369 }
2370 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2371 }
2372
2373 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc)
2374 {
2375 unsigned long flags;
2376 unsigned char mac_addr[] = {
2377 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
2378 };
2379 struct lec_arp_table *to_add;
2380 struct lec_vcc_priv *vpriv;
2381 int err = 0;
2382
2383 if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL)))
2384 return -ENOMEM;
2385 vpriv->xoff = 0;
2386 vpriv->old_pop = vcc->pop;
2387 vcc->user_back = vpriv;
2388 vcc->pop = lec_pop;
2389 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2390 to_add = make_entry(priv, mac_addr);
2391 if (!to_add) {
2392 vcc->pop = vpriv->old_pop;
2393 kfree(vpriv);
2394 err = -ENOMEM;
2395 goto out;
2396 }
2397 memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN);
2398 to_add->status = ESI_FORWARD_DIRECT;
2399 to_add->flags |= LEC_PERMANENT_FLAG;
2400 to_add->vcc = vcc;
2401 to_add->old_push = vcc->push;
2402 vcc->push = lec_push;
2403 priv->mcast_vcc = vcc;
2404 lec_arp_add(priv, to_add);
2405 out:
2406 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2407 return err;
2408 }
2409
2410 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc)
2411 {
2412 unsigned long flags;
2413 struct hlist_node *node, *next;
2414 struct lec_arp_table *entry;
2415 int i;
2416
2417 pr_debug("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci);
2418 dump_arp_table(priv);
2419
2420 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2421
2422 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2423 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
2424 if (vcc == entry->vcc) {
2425 lec_arp_remove(priv, entry);
2426 lec_arp_put(entry);
2427 if (priv->mcast_vcc == vcc) {
2428 priv->mcast_vcc = NULL;
2429 }
2430 }
2431 }
2432 }
2433
2434 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2435 if (entry->vcc == vcc) {
2436 lec_arp_clear_vccs(entry);
2437 del_timer(&entry->timer);
2438 hlist_del(&entry->next);
2439 lec_arp_put(entry);
2440 }
2441 }
2442
2443 hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) {
2444 if (entry->recv_vcc == vcc) {
2445 lec_arp_clear_vccs(entry);
2446 del_timer(&entry->timer);
2447 hlist_del(&entry->next);
2448 lec_arp_put(entry);
2449 }
2450 }
2451
2452 hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) {
2453 if (entry->recv_vcc == vcc) {
2454 lec_arp_clear_vccs(entry);
2455 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
2456 hlist_del(&entry->next);
2457 lec_arp_put(entry);
2458 }
2459 }
2460
2461 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2462 dump_arp_table(priv);
2463 }
2464
2465 static void
2466 lec_arp_check_empties(struct lec_priv *priv,
2467 struct atm_vcc *vcc, struct sk_buff *skb)
2468 {
2469 unsigned long flags;
2470 struct hlist_node *node, *next;
2471 struct lec_arp_table *entry, *tmp;
2472 struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data;
2473 unsigned char *src;
2474 #ifdef CONFIG_TR
2475 struct lecdatahdr_8025 *tr_hdr = (struct lecdatahdr_8025 *)skb->data;
2476
2477 if (priv->is_trdev)
2478 src = tr_hdr->h_source;
2479 else
2480 #endif
2481 src = hdr->h_source;
2482
2483 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2484 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2485 if (vcc == entry->vcc) {
2486 del_timer(&entry->timer);
2487 memcpy(entry->mac_addr, src, ETH_ALEN);
2488 entry->status = ESI_FORWARD_DIRECT;
2489 entry->last_used = jiffies;
2490 /* We might have got an entry */
2491 if ((tmp = lec_arp_find(priv, src))) {
2492 lec_arp_remove(priv, tmp);
2493 lec_arp_put(tmp);
2494 }
2495 hlist_del(&entry->next);
2496 lec_arp_add(priv, entry);
2497 goto out;
2498 }
2499 }
2500 pr_debug("LEC_ARP: Arp_check_empties: entry not found!\n");
2501 out:
2502 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2503 }
2504
2505 MODULE_LICENSE("GPL");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree