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[POWERPC] Move declaration of tce variables into mmu-hash64.h
[linux-2.6/libata-dev.git] / net / atm / lec.c
blob653aca3573ac6b3f34db547c038799c94164a776
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 unsigned 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
270 pr_debug("lec_start_xmit called\n");
271 if (!priv->lecd) {
272 printk("%s:No lecd attached\n", dev->name);
273 priv->stats.tx_errors++;
274 netif_stop_queue(dev);
275 return -EUNATCH;
276 }
277
278 pr_debug("skbuff head:%lx data:%lx tail:%lx end:%lx\n",
279 (long)skb->head, (long)skb->data, (long)skb_tail_pointer(skb),
280 (long)skb_end_pointer(skb));
281 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
282 if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0)
283 lec_handle_bridge(skb, dev);
284 #endif
285
286 /* Make sure we have room for lec_id */
287 if (skb_headroom(skb) < 2) {
288
289 pr_debug("lec_start_xmit: reallocating skb\n");
290 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
291 kfree_skb(skb);
292 if (skb2 == NULL)
293 return 0;
294 skb = skb2;
295 }
296 skb_push(skb, 2);
297
298 /* Put le header to place, works for TokenRing too */
299 lec_h = (struct lecdatahdr_8023 *)skb->data;
300 lec_h->le_header = htons(priv->lecid);
301
302 #ifdef CONFIG_TR
303 /*
304 * Ugly. Use this to realign Token Ring packets for
305 * e.g. PCA-200E driver.
306 */
307 if (priv->is_trdev) {
308 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
309 kfree_skb(skb);
310 if (skb2 == NULL)
311 return 0;
312 skb = skb2;
313 }
314 #endif
315
316 #if DUMP_PACKETS > 0
317 printk("%s: send datalen:%ld lecid:%4.4x\n", dev->name,
318 skb->len, priv->lecid);
319 #if DUMP_PACKETS >= 2
320 for (i = 0; i < skb->len && i < 99; i++) {
321 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
322 }
323 #elif DUMP_PACKETS >= 1
324 for (i = 0; i < skb->len && i < 30; i++) {
325 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
326 }
327 #endif /* DUMP_PACKETS >= 1 */
328 if (i == skb->len)
329 printk("%s\n", buf);
330 else
331 printk("%s...\n", buf);
332 #endif /* DUMP_PACKETS > 0 */
333
334 /* Minimum ethernet-frame size */
335 #ifdef CONFIG_TR
336 if (priv->is_trdev)
337 min_frame_size = LEC_MINIMUM_8025_SIZE;
338 else
339 #endif
340 min_frame_size = LEC_MINIMUM_8023_SIZE;
341 if (skb->len < min_frame_size) {
342 if ((skb->len + skb_tailroom(skb)) < min_frame_size) {
343 skb2 = skb_copy_expand(skb, 0,
344 min_frame_size - skb->truesize,
345 GFP_ATOMIC);
346 dev_kfree_skb(skb);
347 if (skb2 == NULL) {
348 priv->stats.tx_dropped++;
349 return 0;
350 }
351 skb = skb2;
352 }
353 skb_put(skb, min_frame_size - skb->len);
354 }
355
356 /* Send to right vcc */
357 is_rdesc = 0;
358 dst = lec_h->h_dest;
359 #ifdef CONFIG_TR
360 if (priv->is_trdev) {
361 dst = get_tr_dst(skb->data + 2, rdesc);
362 if (dst == NULL) {
363 dst = rdesc;
364 is_rdesc = 1;
365 }
366 }
367 #endif
368 entry = NULL;
369 vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry);
370 pr_debug("%s:vcc:%p vcc_flags:%lx, entry:%p\n", dev->name,
371 vcc, vcc ? vcc->flags : 0, entry);
372 if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) {
373 if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) {
374 pr_debug("%s:lec_start_xmit: queuing packet, ",
375 dev->name);
376 pr_debug("MAC address " MAC_FMT "\n",
377 lec_h->h_dest[0], lec_h->h_dest[1],
378 lec_h->h_dest[2], lec_h->h_dest[3],
379 lec_h->h_dest[4], lec_h->h_dest[5]);
380 skb_queue_tail(&entry->tx_wait, skb);
381 } else {
382 pr_debug
383 ("%s:lec_start_xmit: tx queue full or no arp entry, dropping, ",
384 dev->name);
385 pr_debug("MAC address " MAC_FMT "\n",
386 lec_h->h_dest[0], lec_h->h_dest[1],
387 lec_h->h_dest[2], lec_h->h_dest[3],
388 lec_h->h_dest[4], lec_h->h_dest[5]);
389 priv->stats.tx_dropped++;
390 dev_kfree_skb(skb);
391 }
392 goto out;
393 }
394 #if DUMP_PACKETS > 0
395 printk("%s:sending to vpi:%d vci:%d\n", dev->name, vcc->vpi, vcc->vci);
396 #endif /* DUMP_PACKETS > 0 */
397
398 while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) {
399 pr_debug("lec.c: emptying tx queue, ");
400 pr_debug("MAC address " MAC_FMT "\n",
401 lec_h->h_dest[0], lec_h->h_dest[1],
402 lec_h->h_dest[2], lec_h->h_dest[3],
403 lec_h->h_dest[4], lec_h->h_dest[5]);
404 lec_send(vcc, skb2, priv);
405 }
406
407 lec_send(vcc, skb, priv);
408
409 if (!atm_may_send(vcc, 0)) {
410 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
411
412 vpriv->xoff = 1;
413 netif_stop_queue(dev);
414
415 /*
416 * vcc->pop() might have occurred in between, making
417 * the vcc usuable again. Since xmit is serialized,
418 * this is the only situation we have to re-test.
419 */
420
421 if (atm_may_send(vcc, 0))
422 netif_wake_queue(dev);
423 }
424
425 out:
426 if (entry)
427 lec_arp_put(entry);
428 dev->trans_start = jiffies;
429 return 0;
430 }
431
432 /* The inverse routine to net_open(). */
433 static int lec_close(struct net_device *dev)
434 {
435 netif_stop_queue(dev);
436 return 0;
437 }
438
439 /*
440 * Get the current statistics.
441 * This may be called with the card open or closed.
442 */
443 static struct net_device_stats *lec_get_stats(struct net_device *dev)
444 {
445 return &((struct lec_priv *)dev->priv)->stats;
446 }
447
448 static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
449 {
450 unsigned long flags;
451 struct net_device *dev = (struct net_device *)vcc->proto_data;
452 struct lec_priv *priv = (struct lec_priv *)dev->priv;
453 struct atmlec_msg *mesg;
454 struct lec_arp_table *entry;
455 int i;
456 char *tmp; /* FIXME */
457
458 atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
459 mesg = (struct atmlec_msg *)skb->data;
460 tmp = skb->data;
461 tmp += sizeof(struct atmlec_msg);
462 pr_debug("%s: msg from zeppelin:%d\n", dev->name, mesg->type);
463 switch (mesg->type) {
464 case l_set_mac_addr:
465 for (i = 0; i < 6; i++) {
466 dev->dev_addr[i] = mesg->content.normal.mac_addr[i];
467 }
468 break;
469 case l_del_mac_addr:
470 for (i = 0; i < 6; i++) {
471 dev->dev_addr[i] = 0;
472 }
473 break;
474 case l_addr_delete:
475 lec_addr_delete(priv, mesg->content.normal.atm_addr,
476 mesg->content.normal.flag);
477 break;
478 case l_topology_change:
479 priv->topology_change = mesg->content.normal.flag;
480 break;
481 case l_flush_complete:
482 lec_flush_complete(priv, mesg->content.normal.flag);
483 break;
484 case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */
485 spin_lock_irqsave(&priv->lec_arp_lock, flags);
486 entry = lec_arp_find(priv, mesg->content.normal.mac_addr);
487 lec_arp_remove(priv, entry);
488 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
489
490 if (mesg->content.normal.no_source_le_narp)
491 break;
492 /* FALL THROUGH */
493 case l_arp_update:
494 lec_arp_update(priv, mesg->content.normal.mac_addr,
495 mesg->content.normal.atm_addr,
496 mesg->content.normal.flag,
497 mesg->content.normal.targetless_le_arp);
498 pr_debug("lec: in l_arp_update\n");
499 if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */
500 pr_debug("lec: LANE2 3.1.5, got tlvs, size %d\n",
501 mesg->sizeoftlvs);
502 lane2_associate_ind(dev, mesg->content.normal.mac_addr,
503 tmp, mesg->sizeoftlvs);
504 }
505 break;
506 case l_config:
507 priv->maximum_unknown_frame_count =
508 mesg->content.config.maximum_unknown_frame_count;
509 priv->max_unknown_frame_time =
510 (mesg->content.config.max_unknown_frame_time * HZ);
511 priv->max_retry_count = mesg->content.config.max_retry_count;
512 priv->aging_time = (mesg->content.config.aging_time * HZ);
513 priv->forward_delay_time =
514 (mesg->content.config.forward_delay_time * HZ);
515 priv->arp_response_time =
516 (mesg->content.config.arp_response_time * HZ);
517 priv->flush_timeout = (mesg->content.config.flush_timeout * HZ);
518 priv->path_switching_delay =
519 (mesg->content.config.path_switching_delay * HZ);
520 priv->lane_version = mesg->content.config.lane_version; /* LANE2 */
521 priv->lane2_ops = NULL;
522 if (priv->lane_version > 1)
523 priv->lane2_ops = &lane2_ops;
524 if (dev->change_mtu(dev, mesg->content.config.mtu))
525 printk("%s: change_mtu to %d failed\n", dev->name,
526 mesg->content.config.mtu);
527 priv->is_proxy = mesg->content.config.is_proxy;
528 break;
529 case l_flush_tran_id:
530 lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr,
531 mesg->content.normal.flag);
532 break;
533 case l_set_lecid:
534 priv->lecid =
535 (unsigned short)(0xffff & mesg->content.normal.flag);
536 break;
537 case l_should_bridge:
538 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
539 {
540 struct net_bridge_fdb_entry *f;
541
542 pr_debug
543 ("%s: bridge zeppelin asks about " MAC_FMT "\n",
544 dev->name,
545 mesg->content.proxy.mac_addr[0],
546 mesg->content.proxy.mac_addr[1],
547 mesg->content.proxy.mac_addr[2],
548 mesg->content.proxy.mac_addr[3],
549 mesg->content.proxy.mac_addr[4],
550 mesg->content.proxy.mac_addr[5]);
551
552 if (br_fdb_get_hook == NULL || dev->br_port == NULL)
553 break;
554
555 f = br_fdb_get_hook(dev->br_port->br,
556 mesg->content.proxy.mac_addr);
557 if (f != NULL && f->dst->dev != dev
558 && f->dst->state == BR_STATE_FORWARDING) {
559 /* hit from bridge table, send LE_ARP_RESPONSE */
560 struct sk_buff *skb2;
561 struct sock *sk;
562
563 pr_debug
564 ("%s: entry found, responding to zeppelin\n",
565 dev->name);
566 skb2 =
567 alloc_skb(sizeof(struct atmlec_msg),
568 GFP_ATOMIC);
569 if (skb2 == NULL) {
570 br_fdb_put_hook(f);
571 break;
572 }
573 skb2->len = sizeof(struct atmlec_msg);
574 skb_copy_to_linear_data(skb2, mesg,
575 sizeof(*mesg));
576 atm_force_charge(priv->lecd, skb2->truesize);
577 sk = sk_atm(priv->lecd);
578 skb_queue_tail(&sk->sk_receive_queue, skb2);
579 sk->sk_data_ready(sk, skb2->len);
580 }
581 if (f != NULL)
582 br_fdb_put_hook(f);
583 }
584 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
585 break;
586 default:
587 printk("%s: Unknown message type %d\n", dev->name, mesg->type);
588 dev_kfree_skb(skb);
589 return -EINVAL;
590 }
591 dev_kfree_skb(skb);
592 return 0;
593 }
594
595 static void lec_atm_close(struct atm_vcc *vcc)
596 {
597 struct sk_buff *skb;
598 struct net_device *dev = (struct net_device *)vcc->proto_data;
599 struct lec_priv *priv = (struct lec_priv *)dev->priv;
600
601 priv->lecd = NULL;
602 /* Do something needful? */
603
604 netif_stop_queue(dev);
605 lec_arp_destroy(priv);
606
607 if (skb_peek(&sk_atm(vcc)->sk_receive_queue))
608 printk("%s lec_atm_close: closing with messages pending\n",
609 dev->name);
610 while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue)) != NULL) {
611 atm_return(vcc, skb->truesize);
612 dev_kfree_skb(skb);
613 }
614
615 printk("%s: Shut down!\n", dev->name);
616 module_put(THIS_MODULE);
617 }
618
619 static struct atmdev_ops lecdev_ops = {
620 .close = lec_atm_close,
621 .send = lec_atm_send
622 };
623
624 static struct atm_dev lecatm_dev = {
625 .ops = &lecdev_ops,
626 .type = "lec",
627 .number = 999, /* dummy device number */
628 .lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock)
629 };
630
631 /*
632 * LANE2: new argument struct sk_buff *data contains
633 * the LE_ARP based TLVs introduced in the LANE2 spec
634 */
635 static int
636 send_to_lecd(struct lec_priv *priv, atmlec_msg_type type,
637 unsigned char *mac_addr, unsigned char *atm_addr,
638 struct sk_buff *data)
639 {
640 struct sock *sk;
641 struct sk_buff *skb;
642 struct atmlec_msg *mesg;
643
644 if (!priv || !priv->lecd) {
645 return -1;
646 }
647 skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
648 if (!skb)
649 return -1;
650 skb->len = sizeof(struct atmlec_msg);
651 mesg = (struct atmlec_msg *)skb->data;
652 memset(mesg, 0, sizeof(struct atmlec_msg));
653 mesg->type = type;
654 if (data != NULL)
655 mesg->sizeoftlvs = data->len;
656 if (mac_addr)
657 memcpy(&mesg->content.normal.mac_addr, mac_addr, ETH_ALEN);
658 else
659 mesg->content.normal.targetless_le_arp = 1;
660 if (atm_addr)
661 memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN);
662
663 atm_force_charge(priv->lecd, skb->truesize);
664 sk = sk_atm(priv->lecd);
665 skb_queue_tail(&sk->sk_receive_queue, skb);
666 sk->sk_data_ready(sk, skb->len);
667
668 if (data != NULL) {
669 pr_debug("lec: about to send %d bytes of data\n", data->len);
670 atm_force_charge(priv->lecd, data->truesize);
671 skb_queue_tail(&sk->sk_receive_queue, data);
672 sk->sk_data_ready(sk, skb->len);
673 }
674
675 return 0;
676 }
677
678 /* shamelessly stolen from drivers/net/net_init.c */
679 static int lec_change_mtu(struct net_device *dev, int new_mtu)
680 {
681 if ((new_mtu < 68) || (new_mtu > 18190))
682 return -EINVAL;
683 dev->mtu = new_mtu;
684 return 0;
685 }
686
687 static void lec_set_multicast_list(struct net_device *dev)
688 {
689 /*
690 * by default, all multicast frames arrive over the bus.
691 * eventually support selective multicast service
692 */
693 return;
694 }
695
696 static void lec_init(struct net_device *dev)
697 {
698 dev->change_mtu = lec_change_mtu;
699 dev->open = lec_open;
700 dev->stop = lec_close;
701 dev->hard_start_xmit = lec_start_xmit;
702 dev->tx_timeout = lec_tx_timeout;
703
704 dev->get_stats = lec_get_stats;
705 dev->set_multicast_list = lec_set_multicast_list;
706 dev->do_ioctl = NULL;
707 printk("%s: Initialized!\n", dev->name);
708 return;
709 }
710
711 static unsigned char lec_ctrl_magic[] = {
712 0xff,
713 0x00,
714 0x01,
715 0x01
716 };
717
718 #define LEC_DATA_DIRECT_8023 2
719 #define LEC_DATA_DIRECT_8025 3
720
721 static int lec_is_data_direct(struct atm_vcc *vcc)
722 {
723 return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) ||
724 (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025));
725 }
726
727 static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb)
728 {
729 unsigned long flags;
730 struct net_device *dev = (struct net_device *)vcc->proto_data;
731 struct lec_priv *priv = (struct lec_priv *)dev->priv;
732
733 #if DUMP_PACKETS >0
734 int i = 0;
735 char buf[300];
736
737 printk("%s: lec_push vcc vpi:%d vci:%d\n", dev->name,
738 vcc->vpi, vcc->vci);
739 #endif
740 if (!skb) {
741 pr_debug("%s: null skb\n", dev->name);
742 lec_vcc_close(priv, vcc);
743 return;
744 }
745 #if DUMP_PACKETS > 0
746 printk("%s: rcv datalen:%ld lecid:%4.4x\n", dev->name,
747 skb->len, priv->lecid);
748 #if DUMP_PACKETS >= 2
749 for (i = 0; i < skb->len && i < 99; i++) {
750 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
751 }
752 #elif DUMP_PACKETS >= 1
753 for (i = 0; i < skb->len && i < 30; i++) {
754 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
755 }
756 #endif /* DUMP_PACKETS >= 1 */
757 if (i == skb->len)
758 printk("%s\n", buf);
759 else
760 printk("%s...\n", buf);
761 #endif /* DUMP_PACKETS > 0 */
762 if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) { /* Control frame, to daemon */
763 struct sock *sk = sk_atm(vcc);
764
765 pr_debug("%s: To daemon\n", dev->name);
766 skb_queue_tail(&sk->sk_receive_queue, skb);
767 sk->sk_data_ready(sk, skb->len);
768 } else { /* Data frame, queue to protocol handlers */
769 struct lec_arp_table *entry;
770 unsigned char *src, *dst;
771
772 atm_return(vcc, skb->truesize);
773 if (*(__be16 *) skb->data == htons(priv->lecid) ||
774 !priv->lecd || !(dev->flags & IFF_UP)) {
775 /*
776 * Probably looping back, or if lecd is missing,
777 * lecd has gone down
778 */
779 pr_debug("Ignoring frame...\n");
780 dev_kfree_skb(skb);
781 return;
782 }
783 #ifdef CONFIG_TR
784 if (priv->is_trdev)
785 dst = ((struct lecdatahdr_8025 *)skb->data)->h_dest;
786 else
787 #endif
788 dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest;
789
790 /*
791 * If this is a Data Direct VCC, and the VCC does not match
792 * the LE_ARP cache entry, delete the LE_ARP cache entry.
793 */
794 spin_lock_irqsave(&priv->lec_arp_lock, flags);
795 if (lec_is_data_direct(vcc)) {
796 #ifdef CONFIG_TR
797 if (priv->is_trdev)
798 src =
799 ((struct lecdatahdr_8025 *)skb->data)->
800 h_source;
801 else
802 #endif
803 src =
804 ((struct lecdatahdr_8023 *)skb->data)->
805 h_source;
806 entry = lec_arp_find(priv, src);
807 if (entry && entry->vcc != vcc) {
808 lec_arp_remove(priv, entry);
809 lec_arp_put(entry);
810 }
811 }
812 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
813
814 if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */
815 !priv->is_proxy && /* Proxy wants all the packets */
816 memcmp(dst, dev->dev_addr, dev->addr_len)) {
817 dev_kfree_skb(skb);
818 return;
819 }
820 if (!hlist_empty(&priv->lec_arp_empty_ones)) {
821 lec_arp_check_empties(priv, vcc, skb);
822 }
823 skb_pull(skb, 2); /* skip lec_id */
824 #ifdef CONFIG_TR
825 if (priv->is_trdev)
826 skb->protocol = tr_type_trans(skb, dev);
827 else
828 #endif
829 skb->protocol = eth_type_trans(skb, dev);
830 priv->stats.rx_packets++;
831 priv->stats.rx_bytes += skb->len;
832 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
833 netif_rx(skb);
834 }
835 }
836
837 static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb)
838 {
839 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
840 struct net_device *dev = skb->dev;
841
842 if (vpriv == NULL) {
843 printk("lec_pop(): vpriv = NULL!?!?!?\n");
844 return;
845 }
846
847 vpriv->old_pop(vcc, skb);
848
849 if (vpriv->xoff && atm_may_send(vcc, 0)) {
850 vpriv->xoff = 0;
851 if (netif_running(dev) && netif_queue_stopped(dev))
852 netif_wake_queue(dev);
853 }
854 }
855
856 static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg)
857 {
858 struct lec_vcc_priv *vpriv;
859 int bytes_left;
860 struct atmlec_ioc ioc_data;
861
862 /* Lecd must be up in this case */
863 bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc));
864 if (bytes_left != 0) {
865 printk
866 ("lec: lec_vcc_attach, copy from user failed for %d bytes\n",
867 bytes_left);
868 }
869 if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF ||
870 !dev_lec[ioc_data.dev_num])
871 return -EINVAL;
872 if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL)))
873 return -ENOMEM;
874 vpriv->xoff = 0;
875 vpriv->old_pop = vcc->pop;
876 vcc->user_back = vpriv;
877 vcc->pop = lec_pop;
878 lec_vcc_added(dev_lec[ioc_data.dev_num]->priv,
879 &ioc_data, vcc, vcc->push);
880 vcc->proto_data = dev_lec[ioc_data.dev_num];
881 vcc->push = lec_push;
882 return 0;
883 }
884
885 static int lec_mcast_attach(struct atm_vcc *vcc, int arg)
886 {
887 if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg])
888 return -EINVAL;
889 vcc->proto_data = dev_lec[arg];
890 return (lec_mcast_make((struct lec_priv *)dev_lec[arg]->priv, vcc));
891 }
892
893 /* Initialize device. */
894 static int lecd_attach(struct atm_vcc *vcc, int arg)
895 {
896 int i;
897 struct lec_priv *priv;
898
899 if (arg < 0)
900 i = 0;
901 else
902 i = arg;
903 #ifdef CONFIG_TR
904 if (arg >= MAX_LEC_ITF)
905 return -EINVAL;
906 #else /* Reserve the top NUM_TR_DEVS for TR */
907 if (arg >= (MAX_LEC_ITF - NUM_TR_DEVS))
908 return -EINVAL;
909 #endif
910 if (!dev_lec[i]) {
911 int is_trdev, size;
912
913 is_trdev = 0;
914 if (i >= (MAX_LEC_ITF - NUM_TR_DEVS))
915 is_trdev = 1;
916
917 size = sizeof(struct lec_priv);
918 #ifdef CONFIG_TR
919 if (is_trdev)
920 dev_lec[i] = alloc_trdev(size);
921 else
922 #endif
923 dev_lec[i] = alloc_etherdev(size);
924 if (!dev_lec[i])
925 return -ENOMEM;
926 snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i);
927 if (register_netdev(dev_lec[i])) {
928 free_netdev(dev_lec[i]);
929 return -EINVAL;
930 }
931
932 priv = dev_lec[i]->priv;
933 priv->is_trdev = is_trdev;
934 lec_init(dev_lec[i]);
935 } else {
936 priv = dev_lec[i]->priv;
937 if (priv->lecd)
938 return -EADDRINUSE;
939 }
940 lec_arp_init(priv);
941 priv->itfnum = i; /* LANE2 addition */
942 priv->lecd = vcc;
943 vcc->dev = &lecatm_dev;
944 vcc_insert_socket(sk_atm(vcc));
945
946 vcc->proto_data = dev_lec[i];
947 set_bit(ATM_VF_META, &vcc->flags);
948 set_bit(ATM_VF_READY, &vcc->flags);
949
950 /* Set default values to these variables */
951 priv->maximum_unknown_frame_count = 1;
952 priv->max_unknown_frame_time = (1 * HZ);
953 priv->vcc_timeout_period = (1200 * HZ);
954 priv->max_retry_count = 1;
955 priv->aging_time = (300 * HZ);
956 priv->forward_delay_time = (15 * HZ);
957 priv->topology_change = 0;
958 priv->arp_response_time = (1 * HZ);
959 priv->flush_timeout = (4 * HZ);
960 priv->path_switching_delay = (6 * HZ);
961
962 if (dev_lec[i]->flags & IFF_UP) {
963 netif_start_queue(dev_lec[i]);
964 }
965 __module_get(THIS_MODULE);
966 return i;
967 }
968
969 #ifdef CONFIG_PROC_FS
970 static char *lec_arp_get_status_string(unsigned char status)
971 {
972 static char *lec_arp_status_string[] = {
973 "ESI_UNKNOWN ",
974 "ESI_ARP_PENDING ",
975 "ESI_VC_PENDING ",
976 "<Undefined> ",
977 "ESI_FLUSH_PENDING ",
978 "ESI_FORWARD_DIRECT"
979 };
980
981 if (status > ESI_FORWARD_DIRECT)
982 status = 3; /* ESI_UNDEFINED */
983 return lec_arp_status_string[status];
984 }
985
986 static void lec_info(struct seq_file *seq, struct lec_arp_table *entry)
987 {
988 int i;
989
990 for (i = 0; i < ETH_ALEN; i++)
991 seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff);
992 seq_printf(seq, " ");
993 for (i = 0; i < ATM_ESA_LEN; i++)
994 seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff);
995 seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status),
996 entry->flags & 0xffff);
997 if (entry->vcc)
998 seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci);
999 else
1000 seq_printf(seq, " ");
1001 if (entry->recv_vcc) {
1002 seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi,
1003 entry->recv_vcc->vci);
1004 }
1005 seq_putc(seq, '\n');
1006 }
1007
1008 struct lec_state {
1009 unsigned long flags;
1010 struct lec_priv *locked;
1011 struct hlist_node *node;
1012 struct net_device *dev;
1013 int itf;
1014 int arp_table;
1015 int misc_table;
1016 };
1017
1018 static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl,
1019 loff_t *l)
1020 {
1021 struct hlist_node *e = state->node;
1022 struct lec_arp_table *tmp;
1023
1024 if (!e)
1025 e = tbl->first;
1026 if (e == SEQ_START_TOKEN) {
1027 e = tbl->first;
1028 --*l;
1029 }
1030
1031 hlist_for_each_entry_from(tmp, e, next) {
1032 if (--*l < 0)
1033 break;
1034 }
1035 state->node = e;
1036
1037 return (*l < 0) ? state : NULL;
1038 }
1039
1040 static void *lec_arp_walk(struct lec_state *state, loff_t *l,
1041 struct lec_priv *priv)
1042 {
1043 void *v = NULL;
1044 int p;
1045
1046 for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) {
1047 v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l);
1048 if (v)
1049 break;
1050 }
1051 state->arp_table = p;
1052 return v;
1053 }
1054
1055 static void *lec_misc_walk(struct lec_state *state, loff_t *l,
1056 struct lec_priv *priv)
1057 {
1058 struct hlist_head *lec_misc_tables[] = {
1059 &priv->lec_arp_empty_ones,
1060 &priv->lec_no_forward,
1061 &priv->mcast_fwds
1062 };
1063 void *v = NULL;
1064 int q;
1065
1066 for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) {
1067 v = lec_tbl_walk(state, lec_misc_tables[q], l);
1068 if (v)
1069 break;
1070 }
1071 state->misc_table = q;
1072 return v;
1073 }
1074
1075 static void *lec_priv_walk(struct lec_state *state, loff_t *l,
1076 struct lec_priv *priv)
1077 {
1078 if (!state->locked) {
1079 state->locked = priv;
1080 spin_lock_irqsave(&priv->lec_arp_lock, state->flags);
1081 }
1082 if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) {
1083 spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags);
1084 state->locked = NULL;
1085 /* Partial state reset for the next time we get called */
1086 state->arp_table = state->misc_table = 0;
1087 }
1088 return state->locked;
1089 }
1090
1091 static void *lec_itf_walk(struct lec_state *state, loff_t *l)
1092 {
1093 struct net_device *dev;
1094 void *v;
1095
1096 dev = state->dev ? state->dev : dev_lec[state->itf];
1097 v = (dev && dev->priv) ? lec_priv_walk(state, l, dev->priv) : NULL;
1098 if (!v && dev) {
1099 dev_put(dev);
1100 /* Partial state reset for the next time we get called */
1101 dev = NULL;
1102 }
1103 state->dev = dev;
1104 return v;
1105 }
1106
1107 static void *lec_get_idx(struct lec_state *state, loff_t l)
1108 {
1109 void *v = NULL;
1110
1111 for (; state->itf < MAX_LEC_ITF; state->itf++) {
1112 v = lec_itf_walk(state, &l);
1113 if (v)
1114 break;
1115 }
1116 return v;
1117 }
1118
1119 static void *lec_seq_start(struct seq_file *seq, loff_t *pos)
1120 {
1121 struct lec_state *state = seq->private;
1122
1123 state->itf = 0;
1124 state->dev = NULL;
1125 state->locked = NULL;
1126 state->arp_table = 0;
1127 state->misc_table = 0;
1128 state->node = SEQ_START_TOKEN;
1129
1130 return *pos ? lec_get_idx(state, *pos) : SEQ_START_TOKEN;
1131 }
1132
1133 static void lec_seq_stop(struct seq_file *seq, void *v)
1134 {
1135 struct lec_state *state = seq->private;
1136
1137 if (state->dev) {
1138 spin_unlock_irqrestore(&state->locked->lec_arp_lock,
1139 state->flags);
1140 dev_put(state->dev);
1141 }
1142 }
1143
1144 static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1145 {
1146 struct lec_state *state = seq->private;
1147
1148 v = lec_get_idx(state, 1);
1149 *pos += !!PTR_ERR(v);
1150 return v;
1151 }
1152
1153 static int lec_seq_show(struct seq_file *seq, void *v)
1154 {
1155 static char lec_banner[] = "Itf MAC ATM destination"
1156 " Status Flags "
1157 "VPI/VCI Recv VPI/VCI\n";
1158
1159 if (v == SEQ_START_TOKEN)
1160 seq_puts(seq, lec_banner);
1161 else {
1162 struct lec_state *state = seq->private;
1163 struct net_device *dev = state->dev;
1164 struct lec_arp_table *entry = hlist_entry(state->node, struct lec_arp_table, next);
1165
1166 seq_printf(seq, "%s ", dev->name);
1167 lec_info(seq, entry);
1168 }
1169 return 0;
1170 }
1171
1172 static const struct seq_operations lec_seq_ops = {
1173 .start = lec_seq_start,
1174 .next = lec_seq_next,
1175 .stop = lec_seq_stop,
1176 .show = lec_seq_show,
1177 };
1178
1179 static int lec_seq_open(struct inode *inode, struct file *file)
1180 {
1181 return seq_open_private(file, &lec_seq_ops, sizeof(struct lec_state));
1182 }
1183
1184 static const struct file_operations lec_seq_fops = {
1185 .owner = THIS_MODULE,
1186 .open = lec_seq_open,
1187 .read = seq_read,
1188 .llseek = seq_lseek,
1189 .release = seq_release_private,
1190 };
1191 #endif
1192
1193 static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1194 {
1195 struct atm_vcc *vcc = ATM_SD(sock);
1196 int err = 0;
1197
1198 switch (cmd) {
1199 case ATMLEC_CTRL:
1200 case ATMLEC_MCAST:
1201 case ATMLEC_DATA:
1202 if (!capable(CAP_NET_ADMIN))
1203 return -EPERM;
1204 break;
1205 default:
1206 return -ENOIOCTLCMD;
1207 }
1208
1209 switch (cmd) {
1210 case ATMLEC_CTRL:
1211 err = lecd_attach(vcc, (int)arg);
1212 if (err >= 0)
1213 sock->state = SS_CONNECTED;
1214 break;
1215 case ATMLEC_MCAST:
1216 err = lec_mcast_attach(vcc, (int)arg);
1217 break;
1218 case ATMLEC_DATA:
1219 err = lec_vcc_attach(vcc, (void __user *)arg);
1220 break;
1221 }
1222
1223 return err;
1224 }
1225
1226 static struct atm_ioctl lane_ioctl_ops = {
1227 .owner = THIS_MODULE,
1228 .ioctl = lane_ioctl,
1229 };
1230
1231 static int __init lane_module_init(void)
1232 {
1233 #ifdef CONFIG_PROC_FS
1234 struct proc_dir_entry *p;
1235
1236 p = proc_create("lec", S_IRUGO, atm_proc_root, &lec_seq_fops);
1237 if (!p) {
1238 printk(KERN_ERR "Unable to initialize /proc/net/atm/lec\n");
1239 return -ENOMEM;
1240 }
1241 #endif
1242
1243 register_atm_ioctl(&lane_ioctl_ops);
1244 printk("lec.c: " __DATE__ " " __TIME__ " initialized\n");
1245 return 0;
1246 }
1247
1248 static void __exit lane_module_cleanup(void)
1249 {
1250 int i;
1251 struct lec_priv *priv;
1252
1253 remove_proc_entry("lec", atm_proc_root);
1254
1255 deregister_atm_ioctl(&lane_ioctl_ops);
1256
1257 for (i = 0; i < MAX_LEC_ITF; i++) {
1258 if (dev_lec[i] != NULL) {
1259 priv = (struct lec_priv *)dev_lec[i]->priv;
1260 unregister_netdev(dev_lec[i]);
1261 free_netdev(dev_lec[i]);
1262 dev_lec[i] = NULL;
1263 }
1264 }
1265
1266 return;
1267 }
1268
1269 module_init(lane_module_init);
1270 module_exit(lane_module_cleanup);
1271
1272 /*
1273 * LANE2: 3.1.3, LE_RESOLVE.request
1274 * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs.
1275 * If sizeoftlvs == NULL the default TLVs associated with with this
1276 * lec will be used.
1277 * If dst_mac == NULL, targetless LE_ARP will be sent
1278 */
1279 static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force,
1280 u8 **tlvs, u32 *sizeoftlvs)
1281 {
1282 unsigned long flags;
1283 struct lec_priv *priv = (struct lec_priv *)dev->priv;
1284 struct lec_arp_table *table;
1285 struct sk_buff *skb;
1286 int retval;
1287
1288 if (force == 0) {
1289 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1290 table = lec_arp_find(priv, dst_mac);
1291 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1292 if (table == NULL)
1293 return -1;
1294
1295 *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC);
1296 if (*tlvs == NULL)
1297 return -1;
1298
1299 *sizeoftlvs = table->sizeoftlvs;
1300
1301 return 0;
1302 }
1303
1304 if (sizeoftlvs == NULL)
1305 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL);
1306
1307 else {
1308 skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC);
1309 if (skb == NULL)
1310 return -1;
1311 skb->len = *sizeoftlvs;
1312 skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs);
1313 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb);
1314 }
1315 return retval;
1316 }
1317
1318 /*
1319 * LANE2: 3.1.4, LE_ASSOCIATE.request
1320 * Associate the *tlvs with the *lan_dst address.
1321 * Will overwrite any previous association
1322 * Returns 1 for success, 0 for failure (out of memory)
1323 *
1324 */
1325 static int lane2_associate_req(struct net_device *dev, u8 *lan_dst,
1326 u8 *tlvs, u32 sizeoftlvs)
1327 {
1328 int retval;
1329 struct sk_buff *skb;
1330 struct lec_priv *priv = (struct lec_priv *)dev->priv;
1331
1332 if (compare_ether_addr(lan_dst, dev->dev_addr))
1333 return (0); /* not our mac address */
1334
1335 kfree(priv->tlvs); /* NULL if there was no previous association */
1336
1337 priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1338 if (priv->tlvs == NULL)
1339 return (0);
1340 priv->sizeoftlvs = sizeoftlvs;
1341
1342 skb = alloc_skb(sizeoftlvs, GFP_ATOMIC);
1343 if (skb == NULL)
1344 return 0;
1345 skb->len = sizeoftlvs;
1346 skb_copy_to_linear_data(skb, tlvs, sizeoftlvs);
1347 retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb);
1348 if (retval != 0)
1349 printk("lec.c: lane2_associate_req() failed\n");
1350 /*
1351 * If the previous association has changed we must
1352 * somehow notify other LANE entities about the change
1353 */
1354 return (1);
1355 }
1356
1357 /*
1358 * LANE2: 3.1.5, LE_ASSOCIATE.indication
1359 *
1360 */
1361 static void lane2_associate_ind(struct net_device *dev, u8 *mac_addr,
1362 u8 *tlvs, u32 sizeoftlvs)
1363 {
1364 #if 0
1365 int i = 0;
1366 #endif
1367 struct lec_priv *priv = (struct lec_priv *)dev->priv;
1368 #if 0 /*
1369 * Why have the TLVs in LE_ARP entries
1370 * since we do not use them? When you
1371 * uncomment this code, make sure the
1372 * TLVs get freed when entry is killed
1373 */
1374 struct lec_arp_table *entry = lec_arp_find(priv, mac_addr);
1375
1376 if (entry == NULL)
1377 return; /* should not happen */
1378
1379 kfree(entry->tlvs);
1380
1381 entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1382 if (entry->tlvs == NULL)
1383 return;
1384 entry->sizeoftlvs = sizeoftlvs;
1385 #endif
1386 #if 0
1387 printk("lec.c: lane2_associate_ind()\n");
1388 printk("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs);
1389 while (i < sizeoftlvs)
1390 printk("%02x ", tlvs[i++]);
1391
1392 printk("\n");
1393 #endif
1394
1395 /* tell MPOA about the TLVs we saw */
1396 if (priv->lane2_ops && priv->lane2_ops->associate_indicator) {
1397 priv->lane2_ops->associate_indicator(dev, mac_addr,
1398 tlvs, sizeoftlvs);
1399 }
1400 return;
1401 }
1402
1403 /*
1404 * Here starts what used to lec_arpc.c
1405 *
1406 * lec_arpc.c was added here when making
1407 * lane client modular. October 1997
1408 */
1409
1410 #include <linux/types.h>
1411 #include <linux/timer.h>
1412 #include <asm/param.h>
1413 #include <asm/atomic.h>
1414 #include <linux/inetdevice.h>
1415 #include <net/route.h>
1416
1417 #if 0
1418 #define pr_debug(format,args...)
1419 /*
1420 #define pr_debug printk
1421 */
1422 #endif
1423 #define DEBUG_ARP_TABLE 0
1424
1425 #define LEC_ARP_REFRESH_INTERVAL (3*HZ)
1426
1427 static void lec_arp_check_expire(struct work_struct *work);
1428 static void lec_arp_expire_arp(unsigned long data);
1429
1430 /*
1431 * Arp table funcs
1432 */
1433
1434 #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE -1))
1435
1436 /*
1437 * Initialization of arp-cache
1438 */
1439 static void lec_arp_init(struct lec_priv *priv)
1440 {
1441 unsigned short i;
1442
1443 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1444 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1445 }
1446 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1447 INIT_HLIST_HEAD(&priv->lec_no_forward);
1448 INIT_HLIST_HEAD(&priv->mcast_fwds);
1449 spin_lock_init(&priv->lec_arp_lock);
1450 INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire);
1451 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1452 }
1453
1454 static void lec_arp_clear_vccs(struct lec_arp_table *entry)
1455 {
1456 if (entry->vcc) {
1457 struct atm_vcc *vcc = entry->vcc;
1458 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
1459 struct net_device *dev = (struct net_device *)vcc->proto_data;
1460
1461 vcc->pop = vpriv->old_pop;
1462 if (vpriv->xoff)
1463 netif_wake_queue(dev);
1464 kfree(vpriv);
1465 vcc->user_back = NULL;
1466 vcc->push = entry->old_push;
1467 vcc_release_async(vcc, -EPIPE);
1468 entry->vcc = NULL;
1469 }
1470 if (entry->recv_vcc) {
1471 entry->recv_vcc->push = entry->old_recv_push;
1472 vcc_release_async(entry->recv_vcc, -EPIPE);
1473 entry->recv_vcc = NULL;
1474 }
1475 }
1476
1477 /*
1478 * Insert entry to lec_arp_table
1479 * LANE2: Add to the end of the list to satisfy 8.1.13
1480 */
1481 static inline void
1482 lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry)
1483 {
1484 struct hlist_head *tmp;
1485
1486 tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])];
1487 hlist_add_head(&entry->next, tmp);
1488
1489 pr_debug("LEC_ARP: Added entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1490 0xff & entry->mac_addr[0], 0xff & entry->mac_addr[1],
1491 0xff & entry->mac_addr[2], 0xff & entry->mac_addr[3],
1492 0xff & entry->mac_addr[4], 0xff & entry->mac_addr[5]);
1493 }
1494
1495 /*
1496 * Remove entry from lec_arp_table
1497 */
1498 static int
1499 lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove)
1500 {
1501 struct hlist_node *node;
1502 struct lec_arp_table *entry;
1503 int i, remove_vcc = 1;
1504
1505 if (!to_remove) {
1506 return -1;
1507 }
1508
1509 hlist_del(&to_remove->next);
1510 del_timer(&to_remove->timer);
1511
1512 /* If this is the only MAC connected to this VCC, also tear down the VCC */
1513 if (to_remove->status >= ESI_FLUSH_PENDING) {
1514 /*
1515 * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT
1516 */
1517 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1518 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
1519 if (memcmp(to_remove->atm_addr,
1520 entry->atm_addr, ATM_ESA_LEN) == 0) {
1521 remove_vcc = 0;
1522 break;
1523 }
1524 }
1525 }
1526 if (remove_vcc)
1527 lec_arp_clear_vccs(to_remove);
1528 }
1529 skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */
1530
1531 pr_debug("LEC_ARP: Removed entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1532 0xff & to_remove->mac_addr[0], 0xff & to_remove->mac_addr[1],
1533 0xff & to_remove->mac_addr[2], 0xff & to_remove->mac_addr[3],
1534 0xff & to_remove->mac_addr[4], 0xff & to_remove->mac_addr[5]);
1535 return 0;
1536 }
1537
1538 #if DEBUG_ARP_TABLE
1539 static char *get_status_string(unsigned char st)
1540 {
1541 switch (st) {
1542 case ESI_UNKNOWN:
1543 return "ESI_UNKNOWN";
1544 case ESI_ARP_PENDING:
1545 return "ESI_ARP_PENDING";
1546 case ESI_VC_PENDING:
1547 return "ESI_VC_PENDING";
1548 case ESI_FLUSH_PENDING:
1549 return "ESI_FLUSH_PENDING";
1550 case ESI_FORWARD_DIRECT:
1551 return "ESI_FORWARD_DIRECT";
1552 default:
1553 return "<UNKNOWN>";
1554 }
1555 }
1556
1557 static void dump_arp_table(struct lec_priv *priv)
1558 {
1559 struct hlist_node *node;
1560 struct lec_arp_table *rulla;
1561 char buf[256];
1562 int i, j, offset;
1563
1564 printk("Dump %p:\n", priv);
1565 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1566 hlist_for_each_entry(rulla, node, &priv->lec_arp_tables[i], next) {
1567 offset = 0;
1568 offset += sprintf(buf, "%d: %p\n", i, rulla);
1569 offset += sprintf(buf + offset, "Mac:");
1570 for (j = 0; j < ETH_ALEN; j++) {
1571 offset += sprintf(buf + offset,
1572 "%2.2x ",
1573 rulla->mac_addr[j] & 0xff);
1574 }
1575 offset += sprintf(buf + offset, "Atm:");
1576 for (j = 0; j < ATM_ESA_LEN; j++) {
1577 offset += sprintf(buf + offset,
1578 "%2.2x ",
1579 rulla->atm_addr[j] & 0xff);
1580 }
1581 offset += sprintf(buf + offset,
1582 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1583 rulla->vcc ? rulla->vcc->vpi : 0,
1584 rulla->vcc ? rulla->vcc->vci : 0,
1585 rulla->recv_vcc ? rulla->recv_vcc->
1586 vpi : 0,
1587 rulla->recv_vcc ? rulla->recv_vcc->
1588 vci : 0, rulla->last_used,
1589 rulla->timestamp, rulla->no_tries);
1590 offset +=
1591 sprintf(buf + offset,
1592 "Flags:%x, Packets_flooded:%x, Status: %s ",
1593 rulla->flags, rulla->packets_flooded,
1594 get_status_string(rulla->status));
1595 printk("%s\n", buf);
1596 }
1597 }
1598
1599 if (!hlist_empty(&priv->lec_no_forward))
1600 printk("No forward\n");
1601 hlist_for_each_entry(rulla, node, &priv->lec_no_forward, next) {
1602 offset = 0;
1603 offset += sprintf(buf + offset, "Mac:");
1604 for (j = 0; j < ETH_ALEN; j++) {
1605 offset += sprintf(buf + offset, "%2.2x ",
1606 rulla->mac_addr[j] & 0xff);
1607 }
1608 offset += sprintf(buf + offset, "Atm:");
1609 for (j = 0; j < ATM_ESA_LEN; j++) {
1610 offset += sprintf(buf + offset, "%2.2x ",
1611 rulla->atm_addr[j] & 0xff);
1612 }
1613 offset += sprintf(buf + offset,
1614 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1615 rulla->vcc ? rulla->vcc->vpi : 0,
1616 rulla->vcc ? rulla->vcc->vci : 0,
1617 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1618 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1619 rulla->last_used,
1620 rulla->timestamp, rulla->no_tries);
1621 offset += sprintf(buf + offset,
1622 "Flags:%x, Packets_flooded:%x, Status: %s ",
1623 rulla->flags, rulla->packets_flooded,
1624 get_status_string(rulla->status));
1625 printk("%s\n", buf);
1626 }
1627
1628 if (!hlist_empty(&priv->lec_arp_empty_ones))
1629 printk("Empty ones\n");
1630 hlist_for_each_entry(rulla, node, &priv->lec_arp_empty_ones, next) {
1631 offset = 0;
1632 offset += sprintf(buf + offset, "Mac:");
1633 for (j = 0; j < ETH_ALEN; j++) {
1634 offset += sprintf(buf + offset, "%2.2x ",
1635 rulla->mac_addr[j] & 0xff);
1636 }
1637 offset += sprintf(buf + offset, "Atm:");
1638 for (j = 0; j < ATM_ESA_LEN; j++) {
1639 offset += sprintf(buf + offset, "%2.2x ",
1640 rulla->atm_addr[j] & 0xff);
1641 }
1642 offset += sprintf(buf + offset,
1643 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1644 rulla->vcc ? rulla->vcc->vpi : 0,
1645 rulla->vcc ? rulla->vcc->vci : 0,
1646 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1647 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1648 rulla->last_used,
1649 rulla->timestamp, rulla->no_tries);
1650 offset += sprintf(buf + offset,
1651 "Flags:%x, Packets_flooded:%x, Status: %s ",
1652 rulla->flags, rulla->packets_flooded,
1653 get_status_string(rulla->status));
1654 printk("%s", buf);
1655 }
1656
1657 if (!hlist_empty(&priv->mcast_fwds))
1658 printk("Multicast Forward VCCs\n");
1659 hlist_for_each_entry(rulla, node, &priv->mcast_fwds, next) {
1660 offset = 0;
1661 offset += sprintf(buf + offset, "Mac:");
1662 for (j = 0; j < ETH_ALEN; j++) {
1663 offset += sprintf(buf + offset, "%2.2x ",
1664 rulla->mac_addr[j] & 0xff);
1665 }
1666 offset += sprintf(buf + offset, "Atm:");
1667 for (j = 0; j < ATM_ESA_LEN; j++) {
1668 offset += sprintf(buf + offset, "%2.2x ",
1669 rulla->atm_addr[j] & 0xff);
1670 }
1671 offset += sprintf(buf + offset,
1672 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1673 rulla->vcc ? rulla->vcc->vpi : 0,
1674 rulla->vcc ? rulla->vcc->vci : 0,
1675 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1676 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1677 rulla->last_used,
1678 rulla->timestamp, rulla->no_tries);
1679 offset += sprintf(buf + offset,
1680 "Flags:%x, Packets_flooded:%x, Status: %s ",
1681 rulla->flags, rulla->packets_flooded,
1682 get_status_string(rulla->status));
1683 printk("%s\n", buf);
1684 }
1685
1686 }
1687 #else
1688 #define dump_arp_table(priv) do { } while (0)
1689 #endif
1690
1691 /*
1692 * Destruction of arp-cache
1693 */
1694 static void lec_arp_destroy(struct lec_priv *priv)
1695 {
1696 unsigned long flags;
1697 struct hlist_node *node, *next;
1698 struct lec_arp_table *entry;
1699 int i;
1700
1701 cancel_rearming_delayed_work(&priv->lec_arp_work);
1702
1703 /*
1704 * Remove all entries
1705 */
1706
1707 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1708 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1709 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
1710 lec_arp_remove(priv, entry);
1711 lec_arp_put(entry);
1712 }
1713 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1714 }
1715
1716 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
1717 del_timer_sync(&entry->timer);
1718 lec_arp_clear_vccs(entry);
1719 hlist_del(&entry->next);
1720 lec_arp_put(entry);
1721 }
1722 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1723
1724 hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) {
1725 del_timer_sync(&entry->timer);
1726 lec_arp_clear_vccs(entry);
1727 hlist_del(&entry->next);
1728 lec_arp_put(entry);
1729 }
1730 INIT_HLIST_HEAD(&priv->lec_no_forward);
1731
1732 hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) {
1733 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
1734 lec_arp_clear_vccs(entry);
1735 hlist_del(&entry->next);
1736 lec_arp_put(entry);
1737 }
1738 INIT_HLIST_HEAD(&priv->mcast_fwds);
1739 priv->mcast_vcc = NULL;
1740 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1741 }
1742
1743 /*
1744 * Find entry by mac_address
1745 */
1746 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
1747 unsigned char *mac_addr)
1748 {
1749 struct hlist_node *node;
1750 struct hlist_head *head;
1751 struct lec_arp_table *entry;
1752
1753 pr_debug("LEC_ARP: lec_arp_find :%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1754 mac_addr[0] & 0xff, mac_addr[1] & 0xff, mac_addr[2] & 0xff,
1755 mac_addr[3] & 0xff, mac_addr[4] & 0xff, mac_addr[5] & 0xff);
1756
1757 head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])];
1758 hlist_for_each_entry(entry, node, head, next) {
1759 if (!compare_ether_addr(mac_addr, entry->mac_addr)) {
1760 return entry;
1761 }
1762 }
1763 return NULL;
1764 }
1765
1766 static struct lec_arp_table *make_entry(struct lec_priv *priv,
1767 unsigned char *mac_addr)
1768 {
1769 struct lec_arp_table *to_return;
1770
1771 to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC);
1772 if (!to_return) {
1773 printk("LEC: Arp entry kmalloc failed\n");
1774 return NULL;
1775 }
1776 memcpy(to_return->mac_addr, mac_addr, ETH_ALEN);
1777 INIT_HLIST_NODE(&to_return->next);
1778 setup_timer(&to_return->timer, lec_arp_expire_arp,
1779 (unsigned long)to_return);
1780 to_return->last_used = jiffies;
1781 to_return->priv = priv;
1782 skb_queue_head_init(&to_return->tx_wait);
1783 atomic_set(&to_return->usage, 1);
1784 return to_return;
1785 }
1786
1787 /* Arp sent timer expired */
1788 static void lec_arp_expire_arp(unsigned long data)
1789 {
1790 struct lec_arp_table *entry;
1791
1792 entry = (struct lec_arp_table *)data;
1793
1794 pr_debug("lec_arp_expire_arp\n");
1795 if (entry->status == ESI_ARP_PENDING) {
1796 if (entry->no_tries <= entry->priv->max_retry_count) {
1797 if (entry->is_rdesc)
1798 send_to_lecd(entry->priv, l_rdesc_arp_xmt,
1799 entry->mac_addr, NULL, NULL);
1800 else
1801 send_to_lecd(entry->priv, l_arp_xmt,
1802 entry->mac_addr, NULL, NULL);
1803 entry->no_tries++;
1804 }
1805 mod_timer(&entry->timer, jiffies + (1 * HZ));
1806 }
1807 }
1808
1809 /* Unknown/unused vcc expire, remove associated entry */
1810 static void lec_arp_expire_vcc(unsigned long data)
1811 {
1812 unsigned long flags;
1813 struct lec_arp_table *to_remove = (struct lec_arp_table *)data;
1814 struct lec_priv *priv = (struct lec_priv *)to_remove->priv;
1815
1816 del_timer(&to_remove->timer);
1817
1818 pr_debug("LEC_ARP %p %p: lec_arp_expire_vcc vpi:%d vci:%d\n",
1819 to_remove, priv,
1820 to_remove->vcc ? to_remove->recv_vcc->vpi : 0,
1821 to_remove->vcc ? to_remove->recv_vcc->vci : 0);
1822
1823 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1824 hlist_del(&to_remove->next);
1825 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1826
1827 lec_arp_clear_vccs(to_remove);
1828 lec_arp_put(to_remove);
1829 }
1830
1831 /*
1832 * Expire entries.
1833 * 1. Re-set timer
1834 * 2. For each entry, delete entries that have aged past the age limit.
1835 * 3. For each entry, depending on the status of the entry, perform
1836 * the following maintenance.
1837 * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the
1838 * tick_count is above the max_unknown_frame_time, clear
1839 * the tick_count to zero and clear the packets_flooded counter
1840 * to zero. This supports the packet rate limit per address
1841 * while flooding unknowns.
1842 * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater
1843 * than or equal to the path_switching_delay, change the status
1844 * to ESI_FORWARD_DIRECT. This causes the flush period to end
1845 * regardless of the progress of the flush protocol.
1846 */
1847 static void lec_arp_check_expire(struct work_struct *work)
1848 {
1849 unsigned long flags;
1850 struct lec_priv *priv =
1851 container_of(work, struct lec_priv, lec_arp_work.work);
1852 struct hlist_node *node, *next;
1853 struct lec_arp_table *entry;
1854 unsigned long now;
1855 unsigned long time_to_check;
1856 int i;
1857
1858 pr_debug("lec_arp_check_expire %p\n", priv);
1859 now = jiffies;
1860 restart:
1861 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1862 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1863 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
1864 if ((entry->flags) & LEC_REMOTE_FLAG &&
1865 priv->topology_change)
1866 time_to_check = priv->forward_delay_time;
1867 else
1868 time_to_check = priv->aging_time;
1869
1870 pr_debug("About to expire: %lx - %lx > %lx\n",
1871 now, entry->last_used, time_to_check);
1872 if (time_after(now, entry->last_used + time_to_check)
1873 && !(entry->flags & LEC_PERMANENT_FLAG)
1874 && !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */
1875 /* Remove entry */
1876 pr_debug("LEC:Entry timed out\n");
1877 lec_arp_remove(priv, entry);
1878 lec_arp_put(entry);
1879 } else {
1880 /* Something else */
1881 if ((entry->status == ESI_VC_PENDING ||
1882 entry->status == ESI_ARP_PENDING)
1883 && time_after_eq(now,
1884 entry->timestamp +
1885 priv->
1886 max_unknown_frame_time)) {
1887 entry->timestamp = jiffies;
1888 entry->packets_flooded = 0;
1889 if (entry->status == ESI_VC_PENDING)
1890 send_to_lecd(priv, l_svc_setup,
1891 entry->mac_addr,
1892 entry->atm_addr,
1893 NULL);
1894 }
1895 if (entry->status == ESI_FLUSH_PENDING
1896 &&
1897 time_after_eq(now, entry->timestamp +
1898 priv->path_switching_delay)) {
1899 struct sk_buff *skb;
1900 struct atm_vcc *vcc = entry->vcc;
1901
1902 lec_arp_hold(entry);
1903 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1904 while ((skb = skb_dequeue(&entry->tx_wait)) != NULL)
1905 lec_send(vcc, skb, entry->priv);
1906 entry->last_used = jiffies;
1907 entry->status = ESI_FORWARD_DIRECT;
1908 lec_arp_put(entry);
1909 goto restart;
1910 }
1911 }
1912 }
1913 }
1914 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1915
1916 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1917 }
1918
1919 /*
1920 * Try to find vcc where mac_address is attached.
1921 *
1922 */
1923 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
1924 unsigned char *mac_to_find, int is_rdesc,
1925 struct lec_arp_table **ret_entry)
1926 {
1927 unsigned long flags;
1928 struct lec_arp_table *entry;
1929 struct atm_vcc *found;
1930
1931 if (mac_to_find[0] & 0x01) {
1932 switch (priv->lane_version) {
1933 case 1:
1934 return priv->mcast_vcc;
1935 break;
1936 case 2: /* LANE2 wants arp for multicast addresses */
1937 if (!compare_ether_addr(mac_to_find, bus_mac))
1938 return priv->mcast_vcc;
1939 break;
1940 default:
1941 break;
1942 }
1943 }
1944
1945 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1946 entry = lec_arp_find(priv, mac_to_find);
1947
1948 if (entry) {
1949 if (entry->status == ESI_FORWARD_DIRECT) {
1950 /* Connection Ok */
1951 entry->last_used = jiffies;
1952 lec_arp_hold(entry);
1953 *ret_entry = entry;
1954 found = entry->vcc;
1955 goto out;
1956 }
1957 /*
1958 * If the LE_ARP cache entry is still pending, reset count to 0
1959 * so another LE_ARP request can be made for this frame.
1960 */
1961 if (entry->status == ESI_ARP_PENDING) {
1962 entry->no_tries = 0;
1963 }
1964 /*
1965 * Data direct VC not yet set up, check to see if the unknown
1966 * frame count is greater than the limit. If the limit has
1967 * not been reached, allow the caller to send packet to
1968 * BUS.
1969 */
1970 if (entry->status != ESI_FLUSH_PENDING &&
1971 entry->packets_flooded <
1972 priv->maximum_unknown_frame_count) {
1973 entry->packets_flooded++;
1974 pr_debug("LEC_ARP: Flooding..\n");
1975 found = priv->mcast_vcc;
1976 goto out;
1977 }
1978 /*
1979 * We got here because entry->status == ESI_FLUSH_PENDING
1980 * or BUS flood limit was reached for an entry which is
1981 * in ESI_ARP_PENDING or ESI_VC_PENDING state.
1982 */
1983 lec_arp_hold(entry);
1984 *ret_entry = entry;
1985 pr_debug("lec: entry->status %d entry->vcc %p\n", entry->status,
1986 entry->vcc);
1987 found = NULL;
1988 } else {
1989 /* No matching entry was found */
1990 entry = make_entry(priv, mac_to_find);
1991 pr_debug("LEC_ARP: Making entry\n");
1992 if (!entry) {
1993 found = priv->mcast_vcc;
1994 goto out;
1995 }
1996 lec_arp_add(priv, entry);
1997 /* We want arp-request(s) to be sent */
1998 entry->packets_flooded = 1;
1999 entry->status = ESI_ARP_PENDING;
2000 entry->no_tries = 1;
2001 entry->last_used = entry->timestamp = jiffies;
2002 entry->is_rdesc = is_rdesc;
2003 if (entry->is_rdesc)
2004 send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL,
2005 NULL);
2006 else
2007 send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL);
2008 entry->timer.expires = jiffies + (1 * HZ);
2009 entry->timer.function = lec_arp_expire_arp;
2010 add_timer(&entry->timer);
2011 found = priv->mcast_vcc;
2012 }
2013
2014 out:
2015 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2016 return found;
2017 }
2018
2019 static int
2020 lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr,
2021 unsigned long permanent)
2022 {
2023 unsigned long flags;
2024 struct hlist_node *node, *next;
2025 struct lec_arp_table *entry;
2026 int i;
2027
2028 pr_debug("lec_addr_delete\n");
2029 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2030 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2031 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
2032 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)
2033 && (permanent ||
2034 !(entry->flags & LEC_PERMANENT_FLAG))) {
2035 lec_arp_remove(priv, entry);
2036 lec_arp_put(entry);
2037 }
2038 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2039 return 0;
2040 }
2041 }
2042 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2043 return -1;
2044 }
2045
2046 /*
2047 * Notifies: Response to arp_request (atm_addr != NULL)
2048 */
2049 static void
2050 lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr,
2051 unsigned char *atm_addr, unsigned long remoteflag,
2052 unsigned int targetless_le_arp)
2053 {
2054 unsigned long flags;
2055 struct hlist_node *node, *next;
2056 struct lec_arp_table *entry, *tmp;
2057 int i;
2058
2059 pr_debug("lec:%s", (targetless_le_arp) ? "targetless " : " ");
2060 pr_debug("lec_arp_update mac:%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
2061 mac_addr[0], mac_addr[1], mac_addr[2], mac_addr[3],
2062 mac_addr[4], mac_addr[5]);
2063
2064 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2065 entry = lec_arp_find(priv, mac_addr);
2066 if (entry == NULL && targetless_le_arp)
2067 goto out; /*
2068 * LANE2: ignore targetless LE_ARPs for which
2069 * we have no entry in the cache. 7.1.30
2070 */
2071 if (!hlist_empty(&priv->lec_arp_empty_ones)) {
2072 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2073 if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) {
2074 hlist_del(&entry->next);
2075 del_timer(&entry->timer);
2076 tmp = lec_arp_find(priv, mac_addr);
2077 if (tmp) {
2078 del_timer(&tmp->timer);
2079 tmp->status = ESI_FORWARD_DIRECT;
2080 memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN);
2081 tmp->vcc = entry->vcc;
2082 tmp->old_push = entry->old_push;
2083 tmp->last_used = jiffies;
2084 del_timer(&entry->timer);
2085 lec_arp_put(entry);
2086 entry = tmp;
2087 } else {
2088 entry->status = ESI_FORWARD_DIRECT;
2089 memcpy(entry->mac_addr, mac_addr, ETH_ALEN);
2090 entry->last_used = jiffies;
2091 lec_arp_add(priv, entry);
2092 }
2093 if (remoteflag)
2094 entry->flags |= LEC_REMOTE_FLAG;
2095 else
2096 entry->flags &= ~LEC_REMOTE_FLAG;
2097 pr_debug("After update\n");
2098 dump_arp_table(priv);
2099 goto out;
2100 }
2101 }
2102 }
2103
2104 entry = lec_arp_find(priv, mac_addr);
2105 if (!entry) {
2106 entry = make_entry(priv, mac_addr);
2107 if (!entry)
2108 goto out;
2109 entry->status = ESI_UNKNOWN;
2110 lec_arp_add(priv, entry);
2111 /* Temporary, changes before end of function */
2112 }
2113 memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN);
2114 del_timer(&entry->timer);
2115 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2116 hlist_for_each_entry(tmp, node, &priv->lec_arp_tables[i], next) {
2117 if (entry != tmp &&
2118 !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) {
2119 /* Vcc to this host exists */
2120 if (tmp->status > ESI_VC_PENDING) {
2121 /*
2122 * ESI_FLUSH_PENDING,
2123 * ESI_FORWARD_DIRECT
2124 */
2125 entry->vcc = tmp->vcc;
2126 entry->old_push = tmp->old_push;
2127 }
2128 entry->status = tmp->status;
2129 break;
2130 }
2131 }
2132 }
2133 if (remoteflag)
2134 entry->flags |= LEC_REMOTE_FLAG;
2135 else
2136 entry->flags &= ~LEC_REMOTE_FLAG;
2137 if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) {
2138 entry->status = ESI_VC_PENDING;
2139 send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL);
2140 }
2141 pr_debug("After update2\n");
2142 dump_arp_table(priv);
2143 out:
2144 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2145 }
2146
2147 /*
2148 * Notifies: Vcc setup ready
2149 */
2150 static void
2151 lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data,
2152 struct atm_vcc *vcc,
2153 void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb))
2154 {
2155 unsigned long flags;
2156 struct hlist_node *node;
2157 struct lec_arp_table *entry;
2158 int i, found_entry = 0;
2159
2160 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2161 if (ioc_data->receive == 2) {
2162 /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */
2163
2164 pr_debug("LEC_ARP: Attaching mcast forward\n");
2165 #if 0
2166 entry = lec_arp_find(priv, bus_mac);
2167 if (!entry) {
2168 printk("LEC_ARP: Multicast entry not found!\n");
2169 goto out;
2170 }
2171 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2172 entry->recv_vcc = vcc;
2173 entry->old_recv_push = old_push;
2174 #endif
2175 entry = make_entry(priv, bus_mac);
2176 if (entry == NULL)
2177 goto out;
2178 del_timer(&entry->timer);
2179 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2180 entry->recv_vcc = vcc;
2181 entry->old_recv_push = old_push;
2182 hlist_add_head(&entry->next, &priv->mcast_fwds);
2183 goto out;
2184 } else if (ioc_data->receive == 1) {
2185 /*
2186 * Vcc which we don't want to make default vcc,
2187 * attach it anyway.
2188 */
2189 pr_debug
2190 ("LEC_ARP:Attaching data direct, not default: "
2191 "%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",
2192 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2193 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2194 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2195 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2196 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2197 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2198 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2199 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2200 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2201 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2202 entry = make_entry(priv, bus_mac);
2203 if (entry == NULL)
2204 goto out;
2205 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2206 memset(entry->mac_addr, 0, ETH_ALEN);
2207 entry->recv_vcc = vcc;
2208 entry->old_recv_push = old_push;
2209 entry->status = ESI_UNKNOWN;
2210 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2211 entry->timer.function = lec_arp_expire_vcc;
2212 hlist_add_head(&entry->next, &priv->lec_no_forward);
2213 add_timer(&entry->timer);
2214 dump_arp_table(priv);
2215 goto out;
2216 }
2217 pr_debug
2218 ("LEC_ARP:Attaching data direct, default: "
2219 "%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",
2220 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2221 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2222 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2223 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2224 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2225 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2226 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2227 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2228 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2229 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2230 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2231 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2232 if (memcmp
2233 (ioc_data->atm_addr, entry->atm_addr,
2234 ATM_ESA_LEN) == 0) {
2235 pr_debug("LEC_ARP: Attaching data direct\n");
2236 pr_debug("Currently -> Vcc: %d, Rvcc:%d\n",
2237 entry->vcc ? entry->vcc->vci : 0,
2238 entry->recv_vcc ? entry->recv_vcc->
2239 vci : 0);
2240 found_entry = 1;
2241 del_timer(&entry->timer);
2242 entry->vcc = vcc;
2243 entry->old_push = old_push;
2244 if (entry->status == ESI_VC_PENDING) {
2245 if (priv->maximum_unknown_frame_count
2246 == 0)
2247 entry->status =
2248 ESI_FORWARD_DIRECT;
2249 else {
2250 entry->timestamp = jiffies;
2251 entry->status =
2252 ESI_FLUSH_PENDING;
2253 #if 0
2254 send_to_lecd(priv, l_flush_xmt,
2255 NULL,
2256 entry->atm_addr,
2257 NULL);
2258 #endif
2259 }
2260 } else {
2261 /*
2262 * They were forming a connection
2263 * to us, and we to them. Our
2264 * ATM address is numerically lower
2265 * than theirs, so we make connection
2266 * we formed into default VCC (8.1.11).
2267 * Connection they made gets torn
2268 * down. This might confuse some
2269 * clients. Can be changed if
2270 * someone reports trouble...
2271 */
2272 ;
2273 }
2274 }
2275 }
2276 }
2277 if (found_entry) {
2278 pr_debug("After vcc was added\n");
2279 dump_arp_table(priv);
2280 goto out;
2281 }
2282 /*
2283 * Not found, snatch address from first data packet that arrives
2284 * from this vcc
2285 */
2286 entry = make_entry(priv, bus_mac);
2287 if (!entry)
2288 goto out;
2289 entry->vcc = vcc;
2290 entry->old_push = old_push;
2291 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2292 memset(entry->mac_addr, 0, ETH_ALEN);
2293 entry->status = ESI_UNKNOWN;
2294 hlist_add_head(&entry->next, &priv->lec_arp_empty_ones);
2295 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2296 entry->timer.function = lec_arp_expire_vcc;
2297 add_timer(&entry->timer);
2298 pr_debug("After vcc was added\n");
2299 dump_arp_table(priv);
2300 out:
2301 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2302 }
2303
2304 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id)
2305 {
2306 unsigned long flags;
2307 struct hlist_node *node;
2308 struct lec_arp_table *entry;
2309 int i;
2310
2311 pr_debug("LEC:lec_flush_complete %lx\n", tran_id);
2312 restart:
2313 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2314 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2315 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2316 if (entry->flush_tran_id == tran_id
2317 && entry->status == ESI_FLUSH_PENDING) {
2318 struct sk_buff *skb;
2319 struct atm_vcc *vcc = entry->vcc;
2320
2321 lec_arp_hold(entry);
2322 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2323 while ((skb = skb_dequeue(&entry->tx_wait)) != NULL)
2324 lec_send(vcc, skb, entry->priv);
2325 entry->last_used = jiffies;
2326 entry->status = ESI_FORWARD_DIRECT;
2327 lec_arp_put(entry);
2328 pr_debug("LEC_ARP: Flushed\n");
2329 goto restart;
2330 }
2331 }
2332 }
2333 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2334 dump_arp_table(priv);
2335 }
2336
2337 static void
2338 lec_set_flush_tran_id(struct lec_priv *priv,
2339 unsigned char *atm_addr, unsigned long tran_id)
2340 {
2341 unsigned long flags;
2342 struct hlist_node *node;
2343 struct lec_arp_table *entry;
2344 int i;
2345
2346 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2347 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
2348 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2349 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) {
2350 entry->flush_tran_id = tran_id;
2351 pr_debug("Set flush transaction id to %lx for %p\n",
2352 tran_id, entry);
2353 }
2354 }
2355 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2356 }
2357
2358 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc)
2359 {
2360 unsigned long flags;
2361 unsigned char mac_addr[] = {
2362 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
2363 };
2364 struct lec_arp_table *to_add;
2365 struct lec_vcc_priv *vpriv;
2366 int err = 0;
2367
2368 if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL)))
2369 return -ENOMEM;
2370 vpriv->xoff = 0;
2371 vpriv->old_pop = vcc->pop;
2372 vcc->user_back = vpriv;
2373 vcc->pop = lec_pop;
2374 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2375 to_add = make_entry(priv, mac_addr);
2376 if (!to_add) {
2377 vcc->pop = vpriv->old_pop;
2378 kfree(vpriv);
2379 err = -ENOMEM;
2380 goto out;
2381 }
2382 memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN);
2383 to_add->status = ESI_FORWARD_DIRECT;
2384 to_add->flags |= LEC_PERMANENT_FLAG;
2385 to_add->vcc = vcc;
2386 to_add->old_push = vcc->push;
2387 vcc->push = lec_push;
2388 priv->mcast_vcc = vcc;
2389 lec_arp_add(priv, to_add);
2390 out:
2391 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2392 return err;
2393 }
2394
2395 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc)
2396 {
2397 unsigned long flags;
2398 struct hlist_node *node, *next;
2399 struct lec_arp_table *entry;
2400 int i;
2401
2402 pr_debug("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci);
2403 dump_arp_table(priv);
2404
2405 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2406
2407 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2408 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
2409 if (vcc == entry->vcc) {
2410 lec_arp_remove(priv, entry);
2411 lec_arp_put(entry);
2412 if (priv->mcast_vcc == vcc) {
2413 priv->mcast_vcc = NULL;
2414 }
2415 }
2416 }
2417 }
2418
2419 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2420 if (entry->vcc == vcc) {
2421 lec_arp_clear_vccs(entry);
2422 del_timer(&entry->timer);
2423 hlist_del(&entry->next);
2424 lec_arp_put(entry);
2425 }
2426 }
2427
2428 hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) {
2429 if (entry->recv_vcc == vcc) {
2430 lec_arp_clear_vccs(entry);
2431 del_timer(&entry->timer);
2432 hlist_del(&entry->next);
2433 lec_arp_put(entry);
2434 }
2435 }
2436
2437 hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) {
2438 if (entry->recv_vcc == vcc) {
2439 lec_arp_clear_vccs(entry);
2440 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
2441 hlist_del(&entry->next);
2442 lec_arp_put(entry);
2443 }
2444 }
2445
2446 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2447 dump_arp_table(priv);
2448 }
2449
2450 static void
2451 lec_arp_check_empties(struct lec_priv *priv,
2452 struct atm_vcc *vcc, struct sk_buff *skb)
2453 {
2454 unsigned long flags;
2455 struct hlist_node *node, *next;
2456 struct lec_arp_table *entry, *tmp;
2457 struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data;
2458 unsigned char *src;
2459 #ifdef CONFIG_TR
2460 struct lecdatahdr_8025 *tr_hdr = (struct lecdatahdr_8025 *)skb->data;
2461
2462 if (priv->is_trdev)
2463 src = tr_hdr->h_source;
2464 else
2465 #endif
2466 src = hdr->h_source;
2467
2468 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2469 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2470 if (vcc == entry->vcc) {
2471 del_timer(&entry->timer);
2472 memcpy(entry->mac_addr, src, ETH_ALEN);
2473 entry->status = ESI_FORWARD_DIRECT;
2474 entry->last_used = jiffies;
2475 /* We might have got an entry */
2476 if ((tmp = lec_arp_find(priv, src))) {
2477 lec_arp_remove(priv, tmp);
2478 lec_arp_put(tmp);
2479 }
2480 hlist_del(&entry->next);
2481 lec_arp_add(priv, entry);
2482 goto out;
2483 }
2484 }
2485 pr_debug("LEC_ARP: Arp_check_empties: entry not found!\n");
2486 out:
2487 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2488 }
2489
2490 MODULE_LICENSE("GPL");
Linux 2.6 libata-dev (mirror)