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RT-AC66 3.0.0.4.374.130 core
[tomato.git] / release / src-rt-6.x / linux / linux-2.6 / net / atm / lec.c
blob4dc5f2b8c43c23631fe06f45c49ffd2e84a5d786
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/proc_fs.h>
25 #include <linux/seq_file.h>
26
27 /* TokenRing if needed */
28 #ifdef CONFIG_TR
29 #include <linux/trdevice.h>
30 #endif
31
32 /* And atm device */
33 #include <linux/atmdev.h>
34 #include <linux/atmlec.h>
35
36 /* Proxy LEC knows about bridging */
37 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
38 #include <linux/if_bridge.h>
39 #include "../bridge/br_private.h"
40
41 static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 };
42 #endif
43
44 /* Modular too */
45 #include <linux/module.h>
46 #include <linux/init.h>
47
48 #include "lec.h"
49 #include "lec_arpc.h"
50 #include "resources.h"
51
52 #if 0
53 #define DPRINTK printk
54 #else
55 #define DPRINTK(format,args...)
56 #endif
57
58 #define DUMP_PACKETS 0 /*
59 * 0 = None,
60 * 1 = 30 first bytes
61 * 2 = Whole packet
62 */
63
64 #define LEC_UNRES_QUE_LEN 8 /*
65 * number of tx packets to queue for a
66 * single destination while waiting for SVC
67 */
68
69 static int lec_open(struct net_device *dev);
70 static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev);
71 static int lec_close(struct net_device *dev);
72 static struct net_device_stats *lec_get_stats(struct net_device *dev);
73 static void lec_init(struct net_device *dev);
74 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
75 unsigned char *mac_addr);
76 static int lec_arp_remove(struct lec_priv *priv,
77 struct lec_arp_table *to_remove);
78 /* LANE2 functions */
79 static void lane2_associate_ind(struct net_device *dev, u8 *mac_address,
80 u8 *tlvs, u32 sizeoftlvs);
81 static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force,
82 u8 **tlvs, u32 *sizeoftlvs);
83 static int lane2_associate_req(struct net_device *dev, u8 *lan_dst,
84 u8 *tlvs, u32 sizeoftlvs);
85
86 static int lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr,
87 unsigned long permanent);
88 static void lec_arp_check_empties(struct lec_priv *priv,
89 struct atm_vcc *vcc, struct sk_buff *skb);
90 static void lec_arp_destroy(struct lec_priv *priv);
91 static void lec_arp_init(struct lec_priv *priv);
92 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
93 unsigned char *mac_to_find,
94 int is_rdesc,
95 struct lec_arp_table **ret_entry);
96 static void lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr,
97 unsigned char *atm_addr, unsigned long remoteflag,
98 unsigned int targetless_le_arp);
99 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id);
100 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc);
101 static void lec_set_flush_tran_id(struct lec_priv *priv,
102 unsigned char *atm_addr,
103 unsigned long tran_id);
104 static void lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data,
105 struct atm_vcc *vcc,
106 void (*old_push) (struct atm_vcc *vcc,
107 struct sk_buff *skb));
108 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc);
109
110 /* must be done under lec_arp_lock */
111 static inline void lec_arp_hold(struct lec_arp_table *entry)
112 {
113 atomic_inc(&entry->usage);
114 }
115
116 static inline void lec_arp_put(struct lec_arp_table *entry)
117 {
118 if (atomic_dec_and_test(&entry->usage))
119 kfree(entry);
120 }
121
122
123 static struct lane2_ops lane2_ops = {
124 lane2_resolve, /* resolve, spec 3.1.3 */
125 lane2_associate_req, /* associate_req, spec 3.1.4 */
126 NULL /* associate indicator, spec 3.1.5 */
127 };
128
129 static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
130
131 /* Device structures */
132 static struct net_device *dev_lec[MAX_LEC_ITF];
133
134 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
135 static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev)
136 {
137 struct ethhdr *eth;
138 char *buff;
139 struct lec_priv *priv;
140
141 /*
142 * Check if this is a BPDU. If so, ask zeppelin to send
143 * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit
144 * as the Config BPDU has
145 */
146 eth = (struct ethhdr *)skb->data;
147 buff = skb->data + skb->dev->hard_header_len;
148 if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) {
149 struct sock *sk;
150 struct sk_buff *skb2;
151 struct atmlec_msg *mesg;
152
153 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
154 if (skb2 == NULL)
155 return;
156 skb2->len = sizeof(struct atmlec_msg);
157 mesg = (struct atmlec_msg *)skb2->data;
158 mesg->type = l_topology_change;
159 buff += 4;
160 mesg->content.normal.flag = *buff & 0x01; /* 0x01 is topology change */
161
162 priv = (struct lec_priv *)dev->priv;
163 atm_force_charge(priv->lecd, skb2->truesize);
164 sk = sk_atm(priv->lecd);
165 skb_queue_tail(&sk->sk_receive_queue, skb2);
166 sk->sk_data_ready(sk, skb2->len);
167 }
168
169 return;
170 }
171 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
172
173 /*
174 * Modelled after tr_type_trans
175 * All multicast and ARE or STE frames go to BUS.
176 * Non source routed frames go by destination address.
177 * Last hop source routed frames go by destination address.
178 * Not last hop source routed frames go by _next_ route descriptor.
179 * Returns pointer to destination MAC address or fills in rdesc
180 * and returns NULL.
181 */
182 #ifdef CONFIG_TR
183 static unsigned char *get_tr_dst(unsigned char *packet, unsigned char *rdesc)
184 {
185 struct trh_hdr *trh;
186 int riflen, num_rdsc;
187
188 trh = (struct trh_hdr *)packet;
189 if (trh->daddr[0] & (uint8_t) 0x80)
190 return bus_mac; /* multicast */
191
192 if (trh->saddr[0] & TR_RII) {
193 riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8;
194 if ((ntohs(trh->rcf) >> 13) != 0)
195 return bus_mac; /* ARE or STE */
196 } else
197 return trh->daddr; /* not source routed */
198
199 if (riflen < 6)
200 return trh->daddr; /* last hop, source routed */
201
202 /* riflen is 6 or more, packet has more than one route descriptor */
203 num_rdsc = (riflen / 2) - 1;
204 memset(rdesc, 0, ETH_ALEN);
205 /* offset 4 comes from LAN destination field in LE control frames */
206 if (trh->rcf & htons((uint16_t) TR_RCF_DIR_BIT))
207 memcpy(&rdesc[4], &trh->rseg[num_rdsc - 2], sizeof(__be16));
208 else {
209 memcpy(&rdesc[4], &trh->rseg[1], sizeof(__be16));
210 rdesc[5] = ((ntohs(trh->rseg[0]) & 0x000f) | (rdesc[5] & 0xf0));
211 }
212
213 return NULL;
214 }
215 #endif /* CONFIG_TR */
216
217 /*
218 * Open/initialize the netdevice. This is called (in the current kernel)
219 * sometime after booting when the 'ifconfig' program is run.
220 *
221 * This routine should set everything up anew at each open, even
222 * registers that "should" only need to be set once at boot, so that
223 * there is non-reboot way to recover if something goes wrong.
224 */
225
226 static int lec_open(struct net_device *dev)
227 {
228 struct lec_priv *priv = (struct lec_priv *)dev->priv;
229
230 netif_start_queue(dev);
231 memset(&priv->stats, 0, sizeof(struct net_device_stats));
232
233 return 0;
234 }
235
236 static __inline__ void
237 lec_send(struct atm_vcc *vcc, struct sk_buff *skb, struct lec_priv *priv)
238 {
239 ATM_SKB(skb)->vcc = vcc;
240 ATM_SKB(skb)->atm_options = vcc->atm_options;
241
242 atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
243 if (vcc->send(vcc, skb) < 0) {
244 priv->stats.tx_dropped++;
245 return;
246 }
247
248 priv->stats.tx_packets++;
249 priv->stats.tx_bytes += skb->len;
250 }
251
252 static void lec_tx_timeout(struct net_device *dev)
253 {
254 printk(KERN_INFO "%s: tx timeout\n", dev->name);
255 dev->trans_start = jiffies;
256 netif_wake_queue(dev);
257 }
258
259 static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev)
260 {
261 struct sk_buff *skb2;
262 struct lec_priv *priv = (struct lec_priv *)dev->priv;
263 struct lecdatahdr_8023 *lec_h;
264 struct atm_vcc *vcc;
265 struct lec_arp_table *entry;
266 unsigned char *dst;
267 int min_frame_size;
268 #ifdef CONFIG_TR
269 unsigned char rdesc[ETH_ALEN]; /* Token Ring route descriptor */
270 #endif
271 int is_rdesc;
272 #if DUMP_PACKETS > 0
273 char buf[300];
274 int i = 0;
275 #endif /* DUMP_PACKETS >0 */
276
277 DPRINTK("lec_start_xmit called\n");
278 if (!priv->lecd) {
279 printk("%s:No lecd attached\n", dev->name);
280 priv->stats.tx_errors++;
281 netif_stop_queue(dev);
282 return -EUNATCH;
283 }
284
285 DPRINTK("skbuff head:%lx data:%lx tail:%lx end:%lx\n",
286 (long)skb->head, (long)skb->data, (long)skb_tail_pointer(skb),
287 (long)skb_end_pointer(skb));
288 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
289 if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0)
290 lec_handle_bridge(skb, dev);
291 #endif
292
293 /* Make sure we have room for lec_id */
294 if (skb_headroom(skb) < 2) {
295
296 DPRINTK("lec_start_xmit: reallocating skb\n");
297 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
298 kfree_skb(skb);
299 if (skb2 == NULL)
300 return 0;
301 skb = skb2;
302 }
303 skb_push(skb, 2);
304
305 /* Put le header to place, works for TokenRing too */
306 lec_h = (struct lecdatahdr_8023 *)skb->data;
307 lec_h->le_header = htons(priv->lecid);
308
309 #ifdef CONFIG_TR
310 /*
311 * Ugly. Use this to realign Token Ring packets for
312 * e.g. PCA-200E driver.
313 */
314 if (priv->is_trdev) {
315 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
316 kfree_skb(skb);
317 if (skb2 == NULL)
318 return 0;
319 skb = skb2;
320 }
321 #endif
322
323 #if DUMP_PACKETS > 0
324 printk("%s: send datalen:%ld lecid:%4.4x\n", dev->name,
325 skb->len, priv->lecid);
326 #if DUMP_PACKETS >= 2
327 for (i = 0; i < skb->len && i < 99; i++) {
328 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
329 }
330 #elif DUMP_PACKETS >= 1
331 for (i = 0; i < skb->len && i < 30; i++) {
332 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
333 }
334 #endif /* DUMP_PACKETS >= 1 */
335 if (i == skb->len)
336 printk("%s\n", buf);
337 else
338 printk("%s...\n", buf);
339 #endif /* DUMP_PACKETS > 0 */
340
341 /* Minimum ethernet-frame size */
342 #ifdef CONFIG_TR
343 if (priv->is_trdev)
344 min_frame_size = LEC_MINIMUM_8025_SIZE;
345 else
346 #endif
347 min_frame_size = LEC_MINIMUM_8023_SIZE;
348 if (skb->len < min_frame_size) {
349 if ((skb->len + skb_tailroom(skb)) < min_frame_size) {
350 skb2 = skb_copy_expand(skb, 0,
351 min_frame_size - skb->truesize,
352 GFP_ATOMIC);
353 dev_kfree_skb(skb);
354 if (skb2 == NULL) {
355 priv->stats.tx_dropped++;
356 return 0;
357 }
358 skb = skb2;
359 }
360 skb_put(skb, min_frame_size - skb->len);
361 }
362
363 /* Send to right vcc */
364 is_rdesc = 0;
365 dst = lec_h->h_dest;
366 #ifdef CONFIG_TR
367 if (priv->is_trdev) {
368 dst = get_tr_dst(skb->data + 2, rdesc);
369 if (dst == NULL) {
370 dst = rdesc;
371 is_rdesc = 1;
372 }
373 }
374 #endif
375 entry = NULL;
376 vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry);
377 DPRINTK("%s:vcc:%p vcc_flags:%x, entry:%p\n", dev->name,
378 vcc, vcc ? vcc->flags : 0, entry);
379 if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) {
380 if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) {
381 DPRINTK("%s:lec_start_xmit: queuing packet, ",
382 dev->name);
383 DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
384 lec_h->h_dest[0], lec_h->h_dest[1],
385 lec_h->h_dest[2], lec_h->h_dest[3],
386 lec_h->h_dest[4], lec_h->h_dest[5]);
387 skb_queue_tail(&entry->tx_wait, skb);
388 } else {
389 DPRINTK
390 ("%s:lec_start_xmit: tx queue full or no arp entry, dropping, ",
391 dev->name);
392 DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
393 lec_h->h_dest[0], lec_h->h_dest[1],
394 lec_h->h_dest[2], lec_h->h_dest[3],
395 lec_h->h_dest[4], lec_h->h_dest[5]);
396 priv->stats.tx_dropped++;
397 dev_kfree_skb(skb);
398 }
399 goto out;
400 }
401 #if DUMP_PACKETS > 0
402 printk("%s:sending to vpi:%d vci:%d\n", dev->name, vcc->vpi, vcc->vci);
403 #endif /* DUMP_PACKETS > 0 */
404
405 while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) {
406 DPRINTK("lec.c: emptying tx queue, ");
407 DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
408 lec_h->h_dest[0], lec_h->h_dest[1], lec_h->h_dest[2],
409 lec_h->h_dest[3], lec_h->h_dest[4], lec_h->h_dest[5]);
410 lec_send(vcc, skb2, priv);
411 }
412
413 lec_send(vcc, skb, priv);
414
415 if (!atm_may_send(vcc, 0)) {
416 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
417
418 vpriv->xoff = 1;
419 netif_stop_queue(dev);
420
421 /*
422 * vcc->pop() might have occurred in between, making
423 * the vcc usuable again. Since xmit is serialized,
424 * this is the only situation we have to re-test.
425 */
426
427 if (atm_may_send(vcc, 0))
428 netif_wake_queue(dev);
429 }
430
431 out:
432 if (entry)
433 lec_arp_put(entry);
434 dev->trans_start = jiffies;
435 return 0;
436 }
437
438 /* The inverse routine to net_open(). */
439 static int lec_close(struct net_device *dev)
440 {
441 netif_stop_queue(dev);
442 return 0;
443 }
444
445 /*
446 * Get the current statistics.
447 * This may be called with the card open or closed.
448 */
449 static struct net_device_stats *lec_get_stats(struct net_device *dev)
450 {
451 return &((struct lec_priv *)dev->priv)->stats;
452 }
453
454 static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
455 {
456 unsigned long flags;
457 struct net_device *dev = (struct net_device *)vcc->proto_data;
458 struct lec_priv *priv = (struct lec_priv *)dev->priv;
459 struct atmlec_msg *mesg;
460 struct lec_arp_table *entry;
461 int i;
462 char *tmp; /* FIXME */
463
464 atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
465 mesg = (struct atmlec_msg *)skb->data;
466 tmp = skb->data;
467 tmp += sizeof(struct atmlec_msg);
468 DPRINTK("%s: msg from zeppelin:%d\n", dev->name, mesg->type);
469 switch (mesg->type) {
470 case l_set_mac_addr:
471 for (i = 0; i < 6; i++) {
472 dev->dev_addr[i] = mesg->content.normal.mac_addr[i];
473 }
474 break;
475 case l_del_mac_addr:
476 for (i = 0; i < 6; i++) {
477 dev->dev_addr[i] = 0;
478 }
479 break;
480 case l_addr_delete:
481 lec_addr_delete(priv, mesg->content.normal.atm_addr,
482 mesg->content.normal.flag);
483 break;
484 case l_topology_change:
485 priv->topology_change = mesg->content.normal.flag;
486 break;
487 case l_flush_complete:
488 lec_flush_complete(priv, mesg->content.normal.flag);
489 break;
490 case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */
491 spin_lock_irqsave(&priv->lec_arp_lock, flags);
492 entry = lec_arp_find(priv, mesg->content.normal.mac_addr);
493 lec_arp_remove(priv, entry);
494 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
495
496 if (mesg->content.normal.no_source_le_narp)
497 break;
498 /* FALL THROUGH */
499 case l_arp_update:
500 lec_arp_update(priv, mesg->content.normal.mac_addr,
501 mesg->content.normal.atm_addr,
502 mesg->content.normal.flag,
503 mesg->content.normal.targetless_le_arp);
504 DPRINTK("lec: in l_arp_update\n");
505 if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */
506 DPRINTK("lec: LANE2 3.1.5, got tlvs, size %d\n",
507 mesg->sizeoftlvs);
508 lane2_associate_ind(dev, mesg->content.normal.mac_addr,
509 tmp, mesg->sizeoftlvs);
510 }
511 break;
512 case l_config:
513 priv->maximum_unknown_frame_count =
514 mesg->content.config.maximum_unknown_frame_count;
515 priv->max_unknown_frame_time =
516 (mesg->content.config.max_unknown_frame_time * HZ);
517 priv->max_retry_count = mesg->content.config.max_retry_count;
518 priv->aging_time = (mesg->content.config.aging_time * HZ);
519 priv->forward_delay_time =
520 (mesg->content.config.forward_delay_time * HZ);
521 priv->arp_response_time =
522 (mesg->content.config.arp_response_time * HZ);
523 priv->flush_timeout = (mesg->content.config.flush_timeout * HZ);
524 priv->path_switching_delay =
525 (mesg->content.config.path_switching_delay * HZ);
526 priv->lane_version = mesg->content.config.lane_version; /* LANE2 */
527 priv->lane2_ops = NULL;
528 if (priv->lane_version > 1)
529 priv->lane2_ops = &lane2_ops;
530 if (dev->change_mtu(dev, mesg->content.config.mtu))
531 printk("%s: change_mtu to %d failed\n", dev->name,
532 mesg->content.config.mtu);
533 priv->is_proxy = mesg->content.config.is_proxy;
534 break;
535 case l_flush_tran_id:
536 lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr,
537 mesg->content.normal.flag);
538 break;
539 case l_set_lecid:
540 priv->lecid =
541 (unsigned short)(0xffff & mesg->content.normal.flag);
542 break;
543 case l_should_bridge:
544 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
545 {
546 struct net_bridge_fdb_entry *f;
547
548 DPRINTK
549 ("%s: bridge zeppelin asks about 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
550 dev->name, mesg->content.proxy.mac_addr[0],
551 mesg->content.proxy.mac_addr[1],
552 mesg->content.proxy.mac_addr[2],
553 mesg->content.proxy.mac_addr[3],
554 mesg->content.proxy.mac_addr[4],
555 mesg->content.proxy.mac_addr[5]);
556
557 if (br_fdb_get_hook == NULL || dev->br_port == NULL)
558 break;
559
560 f = br_fdb_get_hook(dev->br_port->br,
561 mesg->content.proxy.mac_addr);
562 if (f != NULL && f->dst->dev != dev
563 && f->dst->state == BR_STATE_FORWARDING) {
564 /* hit from bridge table, send LE_ARP_RESPONSE */
565 struct sk_buff *skb2;
566 struct sock *sk;
567
568 DPRINTK
569 ("%s: entry found, responding to zeppelin\n",
570 dev->name);
571 skb2 =
572 alloc_skb(sizeof(struct atmlec_msg),
573 GFP_ATOMIC);
574 if (skb2 == NULL) {
575 br_fdb_put_hook(f);
576 break;
577 }
578 skb2->len = sizeof(struct atmlec_msg);
579 skb_copy_to_linear_data(skb2, mesg,
580 sizeof(*mesg));
581 atm_force_charge(priv->lecd, skb2->truesize);
582 sk = sk_atm(priv->lecd);
583 skb_queue_tail(&sk->sk_receive_queue, skb2);
584 sk->sk_data_ready(sk, skb2->len);
585 }
586 if (f != NULL)
587 br_fdb_put_hook(f);
588 }
589 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
590 break;
591 default:
592 printk("%s: Unknown message type %d\n", dev->name, mesg->type);
593 dev_kfree_skb(skb);
594 return -EINVAL;
595 }
596 dev_kfree_skb(skb);
597 return 0;
598 }
599
600 static void lec_atm_close(struct atm_vcc *vcc)
601 {
602 struct sk_buff *skb;
603 struct net_device *dev = (struct net_device *)vcc->proto_data;
604 struct lec_priv *priv = (struct lec_priv *)dev->priv;
605
606 priv->lecd = NULL;
607 /* Do something needful? */
608
609 netif_stop_queue(dev);
610 lec_arp_destroy(priv);
611
612 if (skb_peek(&sk_atm(vcc)->sk_receive_queue))
613 printk("%s lec_atm_close: closing with messages pending\n",
614 dev->name);
615 while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue)) != NULL) {
616 atm_return(vcc, skb->truesize);
617 dev_kfree_skb(skb);
618 }
619
620 printk("%s: Shut down!\n", dev->name);
621 module_put(THIS_MODULE);
622 }
623
624 static struct atmdev_ops lecdev_ops = {
625 .close = lec_atm_close,
626 .send = lec_atm_send
627 };
628
629 static struct atm_dev lecatm_dev = {
630 .ops = &lecdev_ops,
631 .type = "lec",
632 .number = 999, /* dummy device number */
633 .lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock)
634 };
635
636 /*
637 * LANE2: new argument struct sk_buff *data contains
638 * the LE_ARP based TLVs introduced in the LANE2 spec
639 */
640 static int
641 send_to_lecd(struct lec_priv *priv, atmlec_msg_type type,
642 unsigned char *mac_addr, unsigned char *atm_addr,
643 struct sk_buff *data)
644 {
645 struct sock *sk;
646 struct sk_buff *skb;
647 struct atmlec_msg *mesg;
648
649 if (!priv || !priv->lecd) {
650 return -1;
651 }
652 skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
653 if (!skb)
654 return -1;
655 skb->len = sizeof(struct atmlec_msg);
656 mesg = (struct atmlec_msg *)skb->data;
657 memset(mesg, 0, sizeof(struct atmlec_msg));
658 mesg->type = type;
659 if (data != NULL)
660 mesg->sizeoftlvs = data->len;
661 if (mac_addr)
662 memcpy(&mesg->content.normal.mac_addr, mac_addr, ETH_ALEN);
663 else
664 mesg->content.normal.targetless_le_arp = 1;
665 if (atm_addr)
666 memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN);
667
668 atm_force_charge(priv->lecd, skb->truesize);
669 sk = sk_atm(priv->lecd);
670 skb_queue_tail(&sk->sk_receive_queue, skb);
671 sk->sk_data_ready(sk, skb->len);
672
673 if (data != NULL) {
674 DPRINTK("lec: about to send %d bytes of data\n", data->len);
675 atm_force_charge(priv->lecd, data->truesize);
676 skb_queue_tail(&sk->sk_receive_queue, data);
677 sk->sk_data_ready(sk, skb->len);
678 }
679
680 return 0;
681 }
682
683 /* shamelessly stolen from drivers/net/net_init.c */
684 static int lec_change_mtu(struct net_device *dev, int new_mtu)
685 {
686 if ((new_mtu < 68) || (new_mtu > 18190))
687 return -EINVAL;
688 dev->mtu = new_mtu;
689 return 0;
690 }
691
692 static void lec_set_multicast_list(struct net_device *dev)
693 {
694 /*
695 * by default, all multicast frames arrive over the bus.
696 * eventually support selective multicast service
697 */
698 return;
699 }
700
701 static void lec_init(struct net_device *dev)
702 {
703 dev->change_mtu = lec_change_mtu;
704 dev->open = lec_open;
705 dev->stop = lec_close;
706 dev->hard_start_xmit = lec_start_xmit;
707 dev->tx_timeout = lec_tx_timeout;
708
709 dev->get_stats = lec_get_stats;
710 dev->set_multicast_list = lec_set_multicast_list;
711 dev->do_ioctl = NULL;
712 printk("%s: Initialized!\n", dev->name);
713 return;
714 }
715
716 static unsigned char lec_ctrl_magic[] = {
717 0xff,
718 0x00,
719 0x01,
720 0x01
721 };
722
723 #define LEC_DATA_DIRECT_8023 2
724 #define LEC_DATA_DIRECT_8025 3
725
726 static int lec_is_data_direct(struct atm_vcc *vcc)
727 {
728 return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) ||
729 (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025));
730 }
731
732 static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb)
733 {
734 unsigned long flags;
735 struct net_device *dev = (struct net_device *)vcc->proto_data;
736 struct lec_priv *priv = (struct lec_priv *)dev->priv;
737
738 #if DUMP_PACKETS >0
739 int i = 0;
740 char buf[300];
741
742 printk("%s: lec_push vcc vpi:%d vci:%d\n", dev->name,
743 vcc->vpi, vcc->vci);
744 #endif
745 if (!skb) {
746 DPRINTK("%s: null skb\n", dev->name);
747 lec_vcc_close(priv, vcc);
748 return;
749 }
750 #if DUMP_PACKETS > 0
751 printk("%s: rcv datalen:%ld lecid:%4.4x\n", dev->name,
752 skb->len, priv->lecid);
753 #if DUMP_PACKETS >= 2
754 for (i = 0; i < skb->len && i < 99; i++) {
755 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
756 }
757 #elif DUMP_PACKETS >= 1
758 for (i = 0; i < skb->len && i < 30; i++) {
759 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
760 }
761 #endif /* DUMP_PACKETS >= 1 */
762 if (i == skb->len)
763 printk("%s\n", buf);
764 else
765 printk("%s...\n", buf);
766 #endif /* DUMP_PACKETS > 0 */
767 if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) { /* Control frame, to daemon */
768 struct sock *sk = sk_atm(vcc);
769
770 DPRINTK("%s: To daemon\n", dev->name);
771 skb_queue_tail(&sk->sk_receive_queue, skb);
772 sk->sk_data_ready(sk, skb->len);
773 } else { /* Data frame, queue to protocol handlers */
774 struct lec_arp_table *entry;
775 unsigned char *src, *dst;
776
777 atm_return(vcc, skb->truesize);
778 if (*(__be16 *) skb->data == htons(priv->lecid) ||
779 !priv->lecd || !(dev->flags & IFF_UP)) {
780 /*
781 * Probably looping back, or if lecd is missing,
782 * lecd has gone down
783 */
784 DPRINTK("Ignoring frame...\n");
785 dev_kfree_skb(skb);
786 return;
787 }
788 #ifdef CONFIG_TR
789 if (priv->is_trdev)
790 dst = ((struct lecdatahdr_8025 *)skb->data)->h_dest;
791 else
792 #endif
793 dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest;
794
795 /*
796 * If this is a Data Direct VCC, and the VCC does not match
797 * the LE_ARP cache entry, delete the LE_ARP cache entry.
798 */
799 spin_lock_irqsave(&priv->lec_arp_lock, flags);
800 if (lec_is_data_direct(vcc)) {
801 #ifdef CONFIG_TR
802 if (priv->is_trdev)
803 src =
804 ((struct lecdatahdr_8025 *)skb->data)->
805 h_source;
806 else
807 #endif
808 src =
809 ((struct lecdatahdr_8023 *)skb->data)->
810 h_source;
811 entry = lec_arp_find(priv, src);
812 if (entry && entry->vcc != vcc) {
813 lec_arp_remove(priv, entry);
814 lec_arp_put(entry);
815 }
816 }
817 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
818
819 if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */
820 !priv->is_proxy && /* Proxy wants all the packets */
821 memcmp(dst, dev->dev_addr, dev->addr_len)) {
822 dev_kfree_skb(skb);
823 return;
824 }
825 if (!hlist_empty(&priv->lec_arp_empty_ones)) {
826 lec_arp_check_empties(priv, vcc, skb);
827 }
828 skb_pull(skb, 2); /* skip lec_id */
829 #ifdef CONFIG_TR
830 if (priv->is_trdev)
831 skb->protocol = tr_type_trans(skb, dev);
832 else
833 #endif
834 skb->protocol = eth_type_trans(skb, dev);
835 priv->stats.rx_packets++;
836 priv->stats.rx_bytes += skb->len;
837 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
838 netif_rx(skb);
839 }
840 }
841
842 static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb)
843 {
844 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
845 struct net_device *dev = skb->dev;
846
847 if (vpriv == NULL) {
848 printk("lec_pop(): vpriv = NULL!?!?!?\n");
849 return;
850 }
851
852 vpriv->old_pop(vcc, skb);
853
854 if (vpriv->xoff && atm_may_send(vcc, 0)) {
855 vpriv->xoff = 0;
856 if (netif_running(dev) && netif_queue_stopped(dev))
857 netif_wake_queue(dev);
858 }
859 }
860
861 static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg)
862 {
863 struct lec_vcc_priv *vpriv;
864 int bytes_left;
865 struct atmlec_ioc ioc_data;
866
867 /* Lecd must be up in this case */
868 bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc));
869 if (bytes_left != 0) {
870 printk
871 ("lec: lec_vcc_attach, copy from user failed for %d bytes\n",
872 bytes_left);
873 }
874 if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF ||
875 !dev_lec[ioc_data.dev_num])
876 return -EINVAL;
877 if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL)))
878 return -ENOMEM;
879 vpriv->xoff = 0;
880 vpriv->old_pop = vcc->pop;
881 vcc->user_back = vpriv;
882 vcc->pop = lec_pop;
883 lec_vcc_added(dev_lec[ioc_data.dev_num]->priv,
884 &ioc_data, vcc, vcc->push);
885 vcc->proto_data = dev_lec[ioc_data.dev_num];
886 vcc->push = lec_push;
887 return 0;
888 }
889
890 static int lec_mcast_attach(struct atm_vcc *vcc, int arg)
891 {
892 if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg])
893 return -EINVAL;
894 vcc->proto_data = dev_lec[arg];
895 return (lec_mcast_make((struct lec_priv *)dev_lec[arg]->priv, vcc));
896 }
897
898 /* Initialize device. */
899 static int lecd_attach(struct atm_vcc *vcc, int arg)
900 {
901 int i;
902 struct lec_priv *priv;
903
904 if (arg < 0)
905 i = 0;
906 else
907 i = arg;
908 #ifdef CONFIG_TR
909 if (arg >= MAX_LEC_ITF)
910 return -EINVAL;
911 #else /* Reserve the top NUM_TR_DEVS for TR */
912 if (arg >= (MAX_LEC_ITF - NUM_TR_DEVS))
913 return -EINVAL;
914 #endif
915 if (!dev_lec[i]) {
916 int is_trdev, size;
917
918 is_trdev = 0;
919 if (i >= (MAX_LEC_ITF - NUM_TR_DEVS))
920 is_trdev = 1;
921
922 size = sizeof(struct lec_priv);
923 #ifdef CONFIG_TR
924 if (is_trdev)
925 dev_lec[i] = alloc_trdev(size);
926 else
927 #endif
928 dev_lec[i] = alloc_etherdev(size);
929 if (!dev_lec[i])
930 return -ENOMEM;
931 snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i);
932 if (register_netdev(dev_lec[i])) {
933 free_netdev(dev_lec[i]);
934 return -EINVAL;
935 }
936
937 priv = dev_lec[i]->priv;
938 priv->is_trdev = is_trdev;
939 lec_init(dev_lec[i]);
940 } else {
941 priv = dev_lec[i]->priv;
942 if (priv->lecd)
943 return -EADDRINUSE;
944 }
945 lec_arp_init(priv);
946 priv->itfnum = i; /* LANE2 addition */
947 priv->lecd = vcc;
948 vcc->dev = &lecatm_dev;
949 vcc_insert_socket(sk_atm(vcc));
950
951 vcc->proto_data = dev_lec[i];
952 set_bit(ATM_VF_META, &vcc->flags);
953 set_bit(ATM_VF_READY, &vcc->flags);
954
955 /* Set default values to these variables */
956 priv->maximum_unknown_frame_count = 1;
957 priv->max_unknown_frame_time = (1 * HZ);
958 priv->vcc_timeout_period = (1200 * HZ);
959 priv->max_retry_count = 1;
960 priv->aging_time = (300 * HZ);
961 priv->forward_delay_time = (15 * HZ);
962 priv->topology_change = 0;
963 priv->arp_response_time = (1 * HZ);
964 priv->flush_timeout = (4 * HZ);
965 priv->path_switching_delay = (6 * HZ);
966
967 if (dev_lec[i]->flags & IFF_UP) {
968 netif_start_queue(dev_lec[i]);
969 }
970 __module_get(THIS_MODULE);
971 return i;
972 }
973
974 #ifdef CONFIG_PROC_FS
975 static char *lec_arp_get_status_string(unsigned char status)
976 {
977 static char *lec_arp_status_string[] = {
978 "ESI_UNKNOWN ",
979 "ESI_ARP_PENDING ",
980 "ESI_VC_PENDING ",
981 "<Undefined> ",
982 "ESI_FLUSH_PENDING ",
983 "ESI_FORWARD_DIRECT"
984 };
985
986 if (status > ESI_FORWARD_DIRECT)
987 status = 3; /* ESI_UNDEFINED */
988 return lec_arp_status_string[status];
989 }
990
991 static void lec_info(struct seq_file *seq, struct lec_arp_table *entry)
992 {
993 int i;
994
995 for (i = 0; i < ETH_ALEN; i++)
996 seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff);
997 seq_printf(seq, " ");
998 for (i = 0; i < ATM_ESA_LEN; i++)
999 seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff);
1000 seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status),
1001 entry->flags & 0xffff);
1002 if (entry->vcc)
1003 seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci);
1004 else
1005 seq_printf(seq, " ");
1006 if (entry->recv_vcc) {
1007 seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi,
1008 entry->recv_vcc->vci);
1009 }
1010 seq_putc(seq, '\n');
1011 }
1012
1013 struct lec_state {
1014 unsigned long flags;
1015 struct lec_priv *locked;
1016 struct hlist_node *node;
1017 struct net_device *dev;
1018 int itf;
1019 int arp_table;
1020 int misc_table;
1021 };
1022
1023 static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl,
1024 loff_t *l)
1025 {
1026 struct hlist_node *e = state->node;
1027 struct lec_arp_table *tmp;
1028
1029 if (!e)
1030 e = tbl->first;
1031 if (e == (void *)1) {
1032 e = tbl->first;
1033 --*l;
1034 }
1035
1036 hlist_for_each_entry_from(tmp, e, next) {
1037 if (--*l < 0)
1038 break;
1039 }
1040 state->node = e;
1041
1042 return (*l < 0) ? state : NULL;
1043 }
1044
1045 static void *lec_arp_walk(struct lec_state *state, loff_t *l,
1046 struct lec_priv *priv)
1047 {
1048 void *v = NULL;
1049 int p;
1050
1051 for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) {
1052 v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l);
1053 if (v)
1054 break;
1055 }
1056 state->arp_table = p;
1057 return v;
1058 }
1059
1060 static void *lec_misc_walk(struct lec_state *state, loff_t *l,
1061 struct lec_priv *priv)
1062 {
1063 struct hlist_head *lec_misc_tables[] = {
1064 &priv->lec_arp_empty_ones,
1065 &priv->lec_no_forward,
1066 &priv->mcast_fwds
1067 };
1068 void *v = NULL;
1069 int q;
1070
1071 for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) {
1072 v = lec_tbl_walk(state, lec_misc_tables[q], l);
1073 if (v)
1074 break;
1075 }
1076 state->misc_table = q;
1077 return v;
1078 }
1079
1080 static void *lec_priv_walk(struct lec_state *state, loff_t *l,
1081 struct lec_priv *priv)
1082 {
1083 if (!state->locked) {
1084 state->locked = priv;
1085 spin_lock_irqsave(&priv->lec_arp_lock, state->flags);
1086 }
1087 if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) {
1088 spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags);
1089 state->locked = NULL;
1090 /* Partial state reset for the next time we get called */
1091 state->arp_table = state->misc_table = 0;
1092 }
1093 return state->locked;
1094 }
1095
1096 static void *lec_itf_walk(struct lec_state *state, loff_t *l)
1097 {
1098 struct net_device *dev;
1099 void *v;
1100
1101 dev = state->dev ? state->dev : dev_lec[state->itf];
1102 v = (dev && dev->priv) ? lec_priv_walk(state, l, dev->priv) : NULL;
1103 if (!v && dev) {
1104 dev_put(dev);
1105 /* Partial state reset for the next time we get called */
1106 dev = NULL;
1107 }
1108 state->dev = dev;
1109 return v;
1110 }
1111
1112 static void *lec_get_idx(struct lec_state *state, loff_t l)
1113 {
1114 void *v = NULL;
1115
1116 for (; state->itf < MAX_LEC_ITF; state->itf++) {
1117 v = lec_itf_walk(state, &l);
1118 if (v)
1119 break;
1120 }
1121 return v;
1122 }
1123
1124 static void *lec_seq_start(struct seq_file *seq, loff_t *pos)
1125 {
1126 struct lec_state *state = seq->private;
1127
1128 state->itf = 0;
1129 state->dev = NULL;
1130 state->locked = NULL;
1131 state->arp_table = 0;
1132 state->misc_table = 0;
1133 state->node = (void *)1;
1134
1135 return *pos ? lec_get_idx(state, *pos) : (void *)1;
1136 }
1137
1138 static void lec_seq_stop(struct seq_file *seq, void *v)
1139 {
1140 struct lec_state *state = seq->private;
1141
1142 if (state->dev) {
1143 spin_unlock_irqrestore(&state->locked->lec_arp_lock,
1144 state->flags);
1145 dev_put(state->dev);
1146 }
1147 }
1148
1149 static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1150 {
1151 struct lec_state *state = seq->private;
1152
1153 v = lec_get_idx(state, 1);
1154 *pos += !!PTR_ERR(v);
1155 return v;
1156 }
1157
1158 static int lec_seq_show(struct seq_file *seq, void *v)
1159 {
1160 static char lec_banner[] = "Itf MAC ATM destination"
1161 " Status Flags "
1162 "VPI/VCI Recv VPI/VCI\n";
1163
1164 if (v == (void *)1)
1165 seq_puts(seq, lec_banner);
1166 else {
1167 struct lec_state *state = seq->private;
1168 struct net_device *dev = state->dev;
1169 struct lec_arp_table *entry = hlist_entry(state->node, struct lec_arp_table, next);
1170
1171 seq_printf(seq, "%s ", dev->name);
1172 lec_info(seq, entry);
1173 }
1174 return 0;
1175 }
1176
1177 static struct seq_operations lec_seq_ops = {
1178 .start = lec_seq_start,
1179 .next = lec_seq_next,
1180 .stop = lec_seq_stop,
1181 .show = lec_seq_show,
1182 };
1183
1184 static int lec_seq_open(struct inode *inode, struct file *file)
1185 {
1186 struct lec_state *state;
1187 struct seq_file *seq;
1188 int rc = -EAGAIN;
1189
1190 state = kmalloc(sizeof(*state), GFP_KERNEL);
1191 if (!state) {
1192 rc = -ENOMEM;
1193 goto out;
1194 }
1195
1196 rc = seq_open(file, &lec_seq_ops);
1197 if (rc)
1198 goto out_kfree;
1199 seq = file->private_data;
1200 seq->private = state;
1201 out:
1202 return rc;
1203
1204 out_kfree:
1205 kfree(state);
1206 goto out;
1207 }
1208
1209 static int lec_seq_release(struct inode *inode, struct file *file)
1210 {
1211 return seq_release_private(inode, file);
1212 }
1213
1214 static const struct file_operations lec_seq_fops = {
1215 .owner = THIS_MODULE,
1216 .open = lec_seq_open,
1217 .read = seq_read,
1218 .llseek = seq_lseek,
1219 .release = lec_seq_release,
1220 };
1221 #endif
1222
1223 static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1224 {
1225 struct atm_vcc *vcc = ATM_SD(sock);
1226 int err = 0;
1227
1228 switch (cmd) {
1229 case ATMLEC_CTRL:
1230 case ATMLEC_MCAST:
1231 case ATMLEC_DATA:
1232 if (!capable(CAP_NET_ADMIN))
1233 return -EPERM;
1234 break;
1235 default:
1236 return -ENOIOCTLCMD;
1237 }
1238
1239 switch (cmd) {
1240 case ATMLEC_CTRL:
1241 err = lecd_attach(vcc, (int)arg);
1242 if (err >= 0)
1243 sock->state = SS_CONNECTED;
1244 break;
1245 case ATMLEC_MCAST:
1246 err = lec_mcast_attach(vcc, (int)arg);
1247 break;
1248 case ATMLEC_DATA:
1249 err = lec_vcc_attach(vcc, (void __user *)arg);
1250 break;
1251 }
1252
1253 return err;
1254 }
1255
1256 static struct atm_ioctl lane_ioctl_ops = {
1257 .owner = THIS_MODULE,
1258 .ioctl = lane_ioctl,
1259 };
1260
1261 static int __init lane_module_init(void)
1262 {
1263 #ifdef CONFIG_PROC_FS
1264 struct proc_dir_entry *p;
1265
1266 p = create_proc_entry("lec", S_IRUGO, atm_proc_root);
1267 if (p)
1268 p->proc_fops = &lec_seq_fops;
1269 #endif
1270
1271 register_atm_ioctl(&lane_ioctl_ops);
1272 printk("lec.c: " __DATE__ " " __TIME__ " initialized\n");
1273 return 0;
1274 }
1275
1276 static void __exit lane_module_cleanup(void)
1277 {
1278 int i;
1279 struct lec_priv *priv;
1280
1281 remove_proc_entry("lec", atm_proc_root);
1282
1283 deregister_atm_ioctl(&lane_ioctl_ops);
1284
1285 for (i = 0; i < MAX_LEC_ITF; i++) {
1286 if (dev_lec[i] != NULL) {
1287 priv = (struct lec_priv *)dev_lec[i]->priv;
1288 unregister_netdev(dev_lec[i]);
1289 free_netdev(dev_lec[i]);
1290 dev_lec[i] = NULL;
1291 }
1292 }
1293
1294 return;
1295 }
1296
1297 module_init(lane_module_init);
1298 module_exit(lane_module_cleanup);
1299
1300 /*
1301 * LANE2: 3.1.3, LE_RESOLVE.request
1302 * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs.
1303 * If sizeoftlvs == NULL the default TLVs associated with with this
1304 * lec will be used.
1305 * If dst_mac == NULL, targetless LE_ARP will be sent
1306 */
1307 static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force,
1308 u8 **tlvs, u32 *sizeoftlvs)
1309 {
1310 unsigned long flags;
1311 struct lec_priv *priv = (struct lec_priv *)dev->priv;
1312 struct lec_arp_table *table;
1313 struct sk_buff *skb;
1314 int retval;
1315
1316 if (force == 0) {
1317 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1318 table = lec_arp_find(priv, dst_mac);
1319 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1320 if (table == NULL)
1321 return -1;
1322
1323 *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC);
1324 if (*tlvs == NULL)
1325 return -1;
1326
1327 *sizeoftlvs = table->sizeoftlvs;
1328
1329 return 0;
1330 }
1331
1332 if (sizeoftlvs == NULL)
1333 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL);
1334
1335 else {
1336 skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC);
1337 if (skb == NULL)
1338 return -1;
1339 skb->len = *sizeoftlvs;
1340 skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs);
1341 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb);
1342 }
1343 return retval;
1344 }
1345
1346 /*
1347 * LANE2: 3.1.4, LE_ASSOCIATE.request
1348 * Associate the *tlvs with the *lan_dst address.
1349 * Will overwrite any previous association
1350 * Returns 1 for success, 0 for failure (out of memory)
1351 *
1352 */
1353 static int lane2_associate_req(struct net_device *dev, u8 *lan_dst,
1354 u8 *tlvs, u32 sizeoftlvs)
1355 {
1356 int retval;
1357 struct sk_buff *skb;
1358 struct lec_priv *priv = (struct lec_priv *)dev->priv;
1359
1360 if (compare_ether_addr(lan_dst, dev->dev_addr))
1361 return (0); /* not our mac address */
1362
1363 kfree(priv->tlvs); /* NULL if there was no previous association */
1364
1365 priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1366 if (priv->tlvs == NULL)
1367 return (0);
1368 priv->sizeoftlvs = sizeoftlvs;
1369
1370 skb = alloc_skb(sizeoftlvs, GFP_ATOMIC);
1371 if (skb == NULL)
1372 return 0;
1373 skb->len = sizeoftlvs;
1374 skb_copy_to_linear_data(skb, tlvs, sizeoftlvs);
1375 retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb);
1376 if (retval != 0)
1377 printk("lec.c: lane2_associate_req() failed\n");
1378 /*
1379 * If the previous association has changed we must
1380 * somehow notify other LANE entities about the change
1381 */
1382 return (1);
1383 }
1384
1385 /*
1386 * LANE2: 3.1.5, LE_ASSOCIATE.indication
1387 *
1388 */
1389 static void lane2_associate_ind(struct net_device *dev, u8 *mac_addr,
1390 u8 *tlvs, u32 sizeoftlvs)
1391 {
1392 #if 0
1393 int i = 0;
1394 #endif
1395 struct lec_priv *priv = (struct lec_priv *)dev->priv;
1396 #if 0 /*
1397 * Why have the TLVs in LE_ARP entries
1398 * since we do not use them? When you
1399 * uncomment this code, make sure the
1400 * TLVs get freed when entry is killed
1401 */
1402 struct lec_arp_table *entry = lec_arp_find(priv, mac_addr);
1403
1404 if (entry == NULL)
1405 return; /* should not happen */
1406
1407 kfree(entry->tlvs);
1408
1409 entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1410 if (entry->tlvs == NULL)
1411 return;
1412 entry->sizeoftlvs = sizeoftlvs;
1413 #endif
1414 #if 0
1415 printk("lec.c: lane2_associate_ind()\n");
1416 printk("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs);
1417 while (i < sizeoftlvs)
1418 printk("%02x ", tlvs[i++]);
1419
1420 printk("\n");
1421 #endif
1422
1423 /* tell MPOA about the TLVs we saw */
1424 if (priv->lane2_ops && priv->lane2_ops->associate_indicator) {
1425 priv->lane2_ops->associate_indicator(dev, mac_addr,
1426 tlvs, sizeoftlvs);
1427 }
1428 return;
1429 }
1430
1431 /*
1432 * Here starts what used to lec_arpc.c
1433 *
1434 * lec_arpc.c was added here when making
1435 * lane client modular. October 1997
1436 */
1437
1438 #include <linux/types.h>
1439 #include <linux/timer.h>
1440 #include <asm/param.h>
1441 #include <asm/atomic.h>
1442 #include <linux/inetdevice.h>
1443 #include <net/route.h>
1444
1445 #if 0
1446 #define DPRINTK(format,args...)
1447 /*
1448 #define DPRINTK printk
1449 */
1450 #endif
1451 #define DEBUG_ARP_TABLE 0
1452
1453 #define LEC_ARP_REFRESH_INTERVAL (3*HZ)
1454
1455 static void lec_arp_check_expire(struct work_struct *work);
1456 static void lec_arp_expire_arp(unsigned long data);
1457
1458 /*
1459 * Arp table funcs
1460 */
1461
1462 #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE -1))
1463
1464 /*
1465 * Initialization of arp-cache
1466 */
1467 static void lec_arp_init(struct lec_priv *priv)
1468 {
1469 unsigned short i;
1470
1471 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1472 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1473 }
1474 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1475 INIT_HLIST_HEAD(&priv->lec_no_forward);
1476 INIT_HLIST_HEAD(&priv->mcast_fwds);
1477 spin_lock_init(&priv->lec_arp_lock);
1478 INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire);
1479 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1480 }
1481
1482 static void lec_arp_clear_vccs(struct lec_arp_table *entry)
1483 {
1484 if (entry->vcc) {
1485 struct atm_vcc *vcc = entry->vcc;
1486 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
1487 struct net_device *dev = (struct net_device *)vcc->proto_data;
1488
1489 vcc->pop = vpriv->old_pop;
1490 if (vpriv->xoff)
1491 netif_wake_queue(dev);
1492 kfree(vpriv);
1493 vcc->user_back = NULL;
1494 vcc->push = entry->old_push;
1495 vcc_release_async(vcc, -EPIPE);
1496 entry->vcc = NULL;
1497 }
1498 if (entry->recv_vcc) {
1499 entry->recv_vcc->push = entry->old_recv_push;
1500 vcc_release_async(entry->recv_vcc, -EPIPE);
1501 entry->recv_vcc = NULL;
1502 }
1503 }
1504
1505 /*
1506 * Insert entry to lec_arp_table
1507 * LANE2: Add to the end of the list to satisfy 8.1.13
1508 */
1509 static inline void
1510 lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry)
1511 {
1512 struct hlist_head *tmp;
1513
1514 tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])];
1515 hlist_add_head(&entry->next, tmp);
1516
1517 DPRINTK("LEC_ARP: Added entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1518 0xff & entry->mac_addr[0], 0xff & entry->mac_addr[1],
1519 0xff & entry->mac_addr[2], 0xff & entry->mac_addr[3],
1520 0xff & entry->mac_addr[4], 0xff & entry->mac_addr[5]);
1521 }
1522
1523 /*
1524 * Remove entry from lec_arp_table
1525 */
1526 static int
1527 lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove)
1528 {
1529 struct hlist_node *node;
1530 struct lec_arp_table *entry;
1531 int i, remove_vcc = 1;
1532
1533 if (!to_remove) {
1534 return -1;
1535 }
1536
1537 hlist_del(&to_remove->next);
1538 del_timer(&to_remove->timer);
1539
1540 /* If this is the only MAC connected to this VCC, also tear down the VCC */
1541 if (to_remove->status >= ESI_FLUSH_PENDING) {
1542 /*
1543 * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT
1544 */
1545 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1546 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
1547 if (memcmp(to_remove->atm_addr,
1548 entry->atm_addr, ATM_ESA_LEN) == 0) {
1549 remove_vcc = 0;
1550 break;
1551 }
1552 }
1553 }
1554 if (remove_vcc)
1555 lec_arp_clear_vccs(to_remove);
1556 }
1557 skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */
1558
1559 DPRINTK("LEC_ARP: Removed entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1560 0xff & to_remove->mac_addr[0], 0xff & to_remove->mac_addr[1],
1561 0xff & to_remove->mac_addr[2], 0xff & to_remove->mac_addr[3],
1562 0xff & to_remove->mac_addr[4], 0xff & to_remove->mac_addr[5]);
1563 return 0;
1564 }
1565
1566 #if DEBUG_ARP_TABLE
1567 static char *get_status_string(unsigned char st)
1568 {
1569 switch (st) {
1570 case ESI_UNKNOWN:
1571 return "ESI_UNKNOWN";
1572 case ESI_ARP_PENDING:
1573 return "ESI_ARP_PENDING";
1574 case ESI_VC_PENDING:
1575 return "ESI_VC_PENDING";
1576 case ESI_FLUSH_PENDING:
1577 return "ESI_FLUSH_PENDING";
1578 case ESI_FORWARD_DIRECT:
1579 return "ESI_FORWARD_DIRECT";
1580 default:
1581 return "<UNKNOWN>";
1582 }
1583 }
1584
1585 static void dump_arp_table(struct lec_priv *priv)
1586 {
1587 struct hlist_node *node;
1588 struct lec_arp_table *rulla;
1589 char buf[256];
1590 int i, j, offset;
1591
1592 printk("Dump %p:\n", priv);
1593 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1594 hlist_for_each_entry(rulla, node, &priv->lec_arp_tables[i], next) {
1595 offset = 0;
1596 offset += sprintf(buf, "%d: %p\n", i, rulla);
1597 offset += sprintf(buf + offset, "Mac:");
1598 for (j = 0; j < ETH_ALEN; j++) {
1599 offset += sprintf(buf + offset,
1600 "%2.2x ",
1601 rulla->mac_addr[j] & 0xff);
1602 }
1603 offset += sprintf(buf + offset, "Atm:");
1604 for (j = 0; j < ATM_ESA_LEN; j++) {
1605 offset += sprintf(buf + offset,
1606 "%2.2x ",
1607 rulla->atm_addr[j] & 0xff);
1608 }
1609 offset += sprintf(buf + offset,
1610 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1611 rulla->vcc ? rulla->vcc->vpi : 0,
1612 rulla->vcc ? rulla->vcc->vci : 0,
1613 rulla->recv_vcc ? rulla->recv_vcc->
1614 vpi : 0,
1615 rulla->recv_vcc ? rulla->recv_vcc->
1616 vci : 0, rulla->last_used,
1617 rulla->timestamp, rulla->no_tries);
1618 offset +=
1619 sprintf(buf + offset,
1620 "Flags:%x, Packets_flooded:%x, Status: %s ",
1621 rulla->flags, rulla->packets_flooded,
1622 get_status_string(rulla->status));
1623 printk("%s\n", buf);
1624 }
1625 }
1626
1627 if (!hlist_empty(&priv->lec_no_forward))
1628 printk("No forward\n");
1629 hlist_for_each_entry(rulla, node, &priv->lec_no_forward, next) {
1630 offset = 0;
1631 offset += sprintf(buf + offset, "Mac:");
1632 for (j = 0; j < ETH_ALEN; j++) {
1633 offset += sprintf(buf + offset, "%2.2x ",
1634 rulla->mac_addr[j] & 0xff);
1635 }
1636 offset += sprintf(buf + offset, "Atm:");
1637 for (j = 0; j < ATM_ESA_LEN; j++) {
1638 offset += sprintf(buf + offset, "%2.2x ",
1639 rulla->atm_addr[j] & 0xff);
1640 }
1641 offset += sprintf(buf + offset,
1642 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1643 rulla->vcc ? rulla->vcc->vpi : 0,
1644 rulla->vcc ? rulla->vcc->vci : 0,
1645 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1646 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1647 rulla->last_used,
1648 rulla->timestamp, rulla->no_tries);
1649 offset += sprintf(buf + offset,
1650 "Flags:%x, Packets_flooded:%x, Status: %s ",
1651 rulla->flags, rulla->packets_flooded,
1652 get_status_string(rulla->status));
1653 printk("%s\n", buf);
1654 }
1655
1656 if (!hlist_empty(&priv->lec_arp_empty_ones))
1657 printk("Empty ones\n");
1658 hlist_for_each_entry(rulla, node, &priv->lec_arp_empty_ones, next) {
1659 offset = 0;
1660 offset += sprintf(buf + offset, "Mac:");
1661 for (j = 0; j < ETH_ALEN; j++) {
1662 offset += sprintf(buf + offset, "%2.2x ",
1663 rulla->mac_addr[j] & 0xff);
1664 }
1665 offset += sprintf(buf + offset, "Atm:");
1666 for (j = 0; j < ATM_ESA_LEN; j++) {
1667 offset += sprintf(buf + offset, "%2.2x ",
1668 rulla->atm_addr[j] & 0xff);
1669 }
1670 offset += sprintf(buf + offset,
1671 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1672 rulla->vcc ? rulla->vcc->vpi : 0,
1673 rulla->vcc ? rulla->vcc->vci : 0,
1674 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1675 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1676 rulla->last_used,
1677 rulla->timestamp, rulla->no_tries);
1678 offset += sprintf(buf + offset,
1679 "Flags:%x, Packets_flooded:%x, Status: %s ",
1680 rulla->flags, rulla->packets_flooded,
1681 get_status_string(rulla->status));
1682 printk("%s", buf);
1683 }
1684
1685 if (!hlist_empty(&priv->mcast_fwds))
1686 printk("Multicast Forward VCCs\n");
1687 hlist_for_each_entry(rulla, node, &priv->mcast_fwds, next) {
1688 offset = 0;
1689 offset += sprintf(buf + offset, "Mac:");
1690 for (j = 0; j < ETH_ALEN; j++) {
1691 offset += sprintf(buf + offset, "%2.2x ",
1692 rulla->mac_addr[j] & 0xff);
1693 }
1694 offset += sprintf(buf + offset, "Atm:");
1695 for (j = 0; j < ATM_ESA_LEN; j++) {
1696 offset += sprintf(buf + offset, "%2.2x ",
1697 rulla->atm_addr[j] & 0xff);
1698 }
1699 offset += sprintf(buf + offset,
1700 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1701 rulla->vcc ? rulla->vcc->vpi : 0,
1702 rulla->vcc ? rulla->vcc->vci : 0,
1703 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1704 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1705 rulla->last_used,
1706 rulla->timestamp, rulla->no_tries);
1707 offset += sprintf(buf + offset,
1708 "Flags:%x, Packets_flooded:%x, Status: %s ",
1709 rulla->flags, rulla->packets_flooded,
1710 get_status_string(rulla->status));
1711 printk("%s\n", buf);
1712 }
1713
1714 }
1715 #else
1716 #define dump_arp_table(priv) do { } while (0)
1717 #endif
1718
1719 /*
1720 * Destruction of arp-cache
1721 */
1722 static void lec_arp_destroy(struct lec_priv *priv)
1723 {
1724 unsigned long flags;
1725 struct hlist_node *node, *next;
1726 struct lec_arp_table *entry;
1727 int i;
1728
1729 cancel_rearming_delayed_work(&priv->lec_arp_work);
1730
1731 /*
1732 * Remove all entries
1733 */
1734
1735 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1736 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1737 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
1738 lec_arp_remove(priv, entry);
1739 lec_arp_put(entry);
1740 }
1741 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1742 }
1743
1744 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
1745 del_timer_sync(&entry->timer);
1746 lec_arp_clear_vccs(entry);
1747 hlist_del(&entry->next);
1748 lec_arp_put(entry);
1749 }
1750 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1751
1752 hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) {
1753 del_timer_sync(&entry->timer);
1754 lec_arp_clear_vccs(entry);
1755 hlist_del(&entry->next);
1756 lec_arp_put(entry);
1757 }
1758 INIT_HLIST_HEAD(&priv->lec_no_forward);
1759
1760 hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) {
1761 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
1762 lec_arp_clear_vccs(entry);
1763 hlist_del(&entry->next);
1764 lec_arp_put(entry);
1765 }
1766 INIT_HLIST_HEAD(&priv->mcast_fwds);
1767 priv->mcast_vcc = NULL;
1768 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1769 }
1770
1771 /*
1772 * Find entry by mac_address
1773 */
1774 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
1775 unsigned char *mac_addr)
1776 {
1777 struct hlist_node *node;
1778 struct hlist_head *head;
1779 struct lec_arp_table *entry;
1780
1781 DPRINTK("LEC_ARP: lec_arp_find :%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1782 mac_addr[0] & 0xff, mac_addr[1] & 0xff, mac_addr[2] & 0xff,
1783 mac_addr[3] & 0xff, mac_addr[4] & 0xff, mac_addr[5] & 0xff);
1784
1785 head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])];
1786 hlist_for_each_entry(entry, node, head, next) {
1787 if (!compare_ether_addr(mac_addr, entry->mac_addr)) {
1788 return entry;
1789 }
1790 }
1791 return NULL;
1792 }
1793
1794 static struct lec_arp_table *make_entry(struct lec_priv *priv,
1795 unsigned char *mac_addr)
1796 {
1797 struct lec_arp_table *to_return;
1798
1799 to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC);
1800 if (!to_return) {
1801 printk("LEC: Arp entry kmalloc failed\n");
1802 return NULL;
1803 }
1804 memcpy(to_return->mac_addr, mac_addr, ETH_ALEN);
1805 INIT_HLIST_NODE(&to_return->next);
1806 init_timer(&to_return->timer);
1807 to_return->timer.function = lec_arp_expire_arp;
1808 to_return->timer.data = (unsigned long)to_return;
1809 to_return->last_used = jiffies;
1810 to_return->priv = priv;
1811 skb_queue_head_init(&to_return->tx_wait);
1812 atomic_set(&to_return->usage, 1);
1813 return to_return;
1814 }
1815
1816 /* Arp sent timer expired */
1817 static void lec_arp_expire_arp(unsigned long data)
1818 {
1819 struct lec_arp_table *entry;
1820
1821 entry = (struct lec_arp_table *)data;
1822
1823 DPRINTK("lec_arp_expire_arp\n");
1824 if (entry->status == ESI_ARP_PENDING) {
1825 if (entry->no_tries <= entry->priv->max_retry_count) {
1826 if (entry->is_rdesc)
1827 send_to_lecd(entry->priv, l_rdesc_arp_xmt,
1828 entry->mac_addr, NULL, NULL);
1829 else
1830 send_to_lecd(entry->priv, l_arp_xmt,
1831 entry->mac_addr, NULL, NULL);
1832 entry->no_tries++;
1833 }
1834 mod_timer(&entry->timer, jiffies + (1 * HZ));
1835 }
1836 }
1837
1838 /* Unknown/unused vcc expire, remove associated entry */
1839 static void lec_arp_expire_vcc(unsigned long data)
1840 {
1841 unsigned long flags;
1842 struct lec_arp_table *to_remove = (struct lec_arp_table *)data;
1843 struct lec_priv *priv = (struct lec_priv *)to_remove->priv;
1844
1845 del_timer(&to_remove->timer);
1846
1847 DPRINTK("LEC_ARP %p %p: lec_arp_expire_vcc vpi:%d vci:%d\n",
1848 to_remove, priv,
1849 to_remove->vcc ? to_remove->recv_vcc->vpi : 0,
1850 to_remove->vcc ? to_remove->recv_vcc->vci : 0);
1851
1852 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1853 hlist_del(&to_remove->next);
1854 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1855
1856 lec_arp_clear_vccs(to_remove);
1857 lec_arp_put(to_remove);
1858 }
1859
1860 /*
1861 * Expire entries.
1862 * 1. Re-set timer
1863 * 2. For each entry, delete entries that have aged past the age limit.
1864 * 3. For each entry, depending on the status of the entry, perform
1865 * the following maintenance.
1866 * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the
1867 * tick_count is above the max_unknown_frame_time, clear
1868 * the tick_count to zero and clear the packets_flooded counter
1869 * to zero. This supports the packet rate limit per address
1870 * while flooding unknowns.
1871 * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater
1872 * than or equal to the path_switching_delay, change the status
1873 * to ESI_FORWARD_DIRECT. This causes the flush period to end
1874 * regardless of the progress of the flush protocol.
1875 */
1876 static void lec_arp_check_expire(struct work_struct *work)
1877 {
1878 unsigned long flags;
1879 struct lec_priv *priv =
1880 container_of(work, struct lec_priv, lec_arp_work.work);
1881 struct hlist_node *node, *next;
1882 struct lec_arp_table *entry;
1883 unsigned long now;
1884 unsigned long time_to_check;
1885 int i;
1886
1887 DPRINTK("lec_arp_check_expire %p\n", priv);
1888 now = jiffies;
1889 restart:
1890 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1891 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1892 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
1893 if ((entry->flags) & LEC_REMOTE_FLAG &&
1894 priv->topology_change)
1895 time_to_check = priv->forward_delay_time;
1896 else
1897 time_to_check = priv->aging_time;
1898
1899 DPRINTK("About to expire: %lx - %lx > %lx\n",
1900 now, entry->last_used, time_to_check);
1901 if (time_after(now, entry->last_used + time_to_check)
1902 && !(entry->flags & LEC_PERMANENT_FLAG)
1903 && !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */
1904 /* Remove entry */
1905 DPRINTK("LEC:Entry timed out\n");
1906 lec_arp_remove(priv, entry);
1907 lec_arp_put(entry);
1908 } else {
1909 /* Something else */
1910 if ((entry->status == ESI_VC_PENDING ||
1911 entry->status == ESI_ARP_PENDING)
1912 && time_after_eq(now,
1913 entry->timestamp +
1914 priv->
1915 max_unknown_frame_time)) {
1916 entry->timestamp = jiffies;
1917 entry->packets_flooded = 0;
1918 if (entry->status == ESI_VC_PENDING)
1919 send_to_lecd(priv, l_svc_setup,
1920 entry->mac_addr,
1921 entry->atm_addr,
1922 NULL);
1923 }
1924 if (entry->status == ESI_FLUSH_PENDING
1925 &&
1926 time_after_eq(now, entry->timestamp +
1927 priv->path_switching_delay)) {
1928 struct sk_buff *skb;
1929 struct atm_vcc *vcc = entry->vcc;
1930
1931 lec_arp_hold(entry);
1932 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1933 while ((skb = skb_dequeue(&entry->tx_wait)) != NULL)
1934 lec_send(vcc, skb, entry->priv);
1935 entry->last_used = jiffies;
1936 entry->status = ESI_FORWARD_DIRECT;
1937 lec_arp_put(entry);
1938 goto restart;
1939 }
1940 }
1941 }
1942 }
1943 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1944
1945 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1946 }
1947
1948 /*
1949 * Try to find vcc where mac_address is attached.
1950 *
1951 */
1952 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
1953 unsigned char *mac_to_find, int is_rdesc,
1954 struct lec_arp_table **ret_entry)
1955 {
1956 unsigned long flags;
1957 struct lec_arp_table *entry;
1958 struct atm_vcc *found;
1959
1960 if (mac_to_find[0] & 0x01) {
1961 switch (priv->lane_version) {
1962 case 1:
1963 return priv->mcast_vcc;
1964 break;
1965 case 2: /* LANE2 wants arp for multicast addresses */
1966 if (!compare_ether_addr(mac_to_find, bus_mac))
1967 return priv->mcast_vcc;
1968 break;
1969 default:
1970 break;
1971 }
1972 }
1973
1974 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1975 entry = lec_arp_find(priv, mac_to_find);
1976
1977 if (entry) {
1978 if (entry->status == ESI_FORWARD_DIRECT) {
1979 /* Connection Ok */
1980 entry->last_used = jiffies;
1981 lec_arp_hold(entry);
1982 *ret_entry = entry;
1983 found = entry->vcc;
1984 goto out;
1985 }
1986 /*
1987 * If the LE_ARP cache entry is still pending, reset count to 0
1988 * so another LE_ARP request can be made for this frame.
1989 */
1990 if (entry->status == ESI_ARP_PENDING) {
1991 entry->no_tries = 0;
1992 }
1993 /*
1994 * Data direct VC not yet set up, check to see if the unknown
1995 * frame count is greater than the limit. If the limit has
1996 * not been reached, allow the caller to send packet to
1997 * BUS.
1998 */
1999 if (entry->status != ESI_FLUSH_PENDING &&
2000 entry->packets_flooded <
2001 priv->maximum_unknown_frame_count) {
2002 entry->packets_flooded++;
2003 DPRINTK("LEC_ARP: Flooding..\n");
2004 found = priv->mcast_vcc;
2005 goto out;
2006 }
2007 /*
2008 * We got here because entry->status == ESI_FLUSH_PENDING
2009 * or BUS flood limit was reached for an entry which is
2010 * in ESI_ARP_PENDING or ESI_VC_PENDING state.
2011 */
2012 lec_arp_hold(entry);
2013 *ret_entry = entry;
2014 DPRINTK("lec: entry->status %d entry->vcc %p\n", entry->status,
2015 entry->vcc);
2016 found = NULL;
2017 } else {
2018 /* No matching entry was found */
2019 entry = make_entry(priv, mac_to_find);
2020 DPRINTK("LEC_ARP: Making entry\n");
2021 if (!entry) {
2022 found = priv->mcast_vcc;
2023 goto out;
2024 }
2025 lec_arp_add(priv, entry);
2026 /* We want arp-request(s) to be sent */
2027 entry->packets_flooded = 1;
2028 entry->status = ESI_ARP_PENDING;
2029 entry->no_tries = 1;
2030 entry->last_used = entry->timestamp = jiffies;
2031 entry->is_rdesc = is_rdesc;
2032 if (entry->is_rdesc)
2033 send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL,
2034 NULL);
2035 else
2036 send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL);
2037 entry->timer.expires = jiffies + (1 * HZ);
2038 entry->timer.function = lec_arp_expire_arp;
2039 add_timer(&entry->timer);
2040 found = priv->mcast_vcc;
2041 }
2042
2043 out:
2044 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2045 return found;
2046 }
2047
2048 static int
2049 lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr,
2050 unsigned long permanent)
2051 {
2052 unsigned long flags;
2053 struct hlist_node *node, *next;
2054 struct lec_arp_table *entry;
2055 int i;
2056
2057 DPRINTK("lec_addr_delete\n");
2058 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2059 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2060 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
2061 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)
2062 && (permanent ||
2063 !(entry->flags & LEC_PERMANENT_FLAG))) {
2064 lec_arp_remove(priv, entry);
2065 lec_arp_put(entry);
2066 }
2067 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2068 return 0;
2069 }
2070 }
2071 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2072 return -1;
2073 }
2074
2075 /*
2076 * Notifies: Response to arp_request (atm_addr != NULL)
2077 */
2078 static void
2079 lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr,
2080 unsigned char *atm_addr, unsigned long remoteflag,
2081 unsigned int targetless_le_arp)
2082 {
2083 unsigned long flags;
2084 struct hlist_node *node, *next;
2085 struct lec_arp_table *entry, *tmp;
2086 int i;
2087
2088 DPRINTK("lec:%s", (targetless_le_arp) ? "targetless " : " ");
2089 DPRINTK("lec_arp_update mac:%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
2090 mac_addr[0], mac_addr[1], mac_addr[2], mac_addr[3],
2091 mac_addr[4], mac_addr[5]);
2092
2093 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2094 entry = lec_arp_find(priv, mac_addr);
2095 if (entry == NULL && targetless_le_arp)
2096 goto out; /*
2097 * LANE2: ignore targetless LE_ARPs for which
2098 * we have no entry in the cache. 7.1.30
2099 */
2100 if (!hlist_empty(&priv->lec_arp_empty_ones)) {
2101 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2102 if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) {
2103 hlist_del(&entry->next);
2104 del_timer(&entry->timer);
2105 tmp = lec_arp_find(priv, mac_addr);
2106 if (tmp) {
2107 del_timer(&tmp->timer);
2108 tmp->status = ESI_FORWARD_DIRECT;
2109 memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN);
2110 tmp->vcc = entry->vcc;
2111 tmp->old_push = entry->old_push;
2112 tmp->last_used = jiffies;
2113 del_timer(&entry->timer);
2114 lec_arp_put(entry);
2115 entry = tmp;
2116 } else {
2117 entry->status = ESI_FORWARD_DIRECT;
2118 memcpy(entry->mac_addr, mac_addr, ETH_ALEN);
2119 entry->last_used = jiffies;
2120 lec_arp_add(priv, entry);
2121 }
2122 if (remoteflag)
2123 entry->flags |= LEC_REMOTE_FLAG;
2124 else
2125 entry->flags &= ~LEC_REMOTE_FLAG;
2126 DPRINTK("After update\n");
2127 dump_arp_table(priv);
2128 goto out;
2129 }
2130 }
2131 }
2132
2133 entry = lec_arp_find(priv, mac_addr);
2134 if (!entry) {
2135 entry = make_entry(priv, mac_addr);
2136 if (!entry)
2137 goto out;
2138 entry->status = ESI_UNKNOWN;
2139 lec_arp_add(priv, entry);
2140 /* Temporary, changes before end of function */
2141 }
2142 memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN);
2143 del_timer(&entry->timer);
2144 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2145 hlist_for_each_entry(tmp, node, &priv->lec_arp_tables[i], next) {
2146 if (entry != tmp &&
2147 !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) {
2148 /* Vcc to this host exists */
2149 if (tmp->status > ESI_VC_PENDING) {
2150 /*
2151 * ESI_FLUSH_PENDING,
2152 * ESI_FORWARD_DIRECT
2153 */
2154 entry->vcc = tmp->vcc;
2155 entry->old_push = tmp->old_push;
2156 }
2157 entry->status = tmp->status;
2158 break;
2159 }
2160 }
2161 }
2162 if (remoteflag)
2163 entry->flags |= LEC_REMOTE_FLAG;
2164 else
2165 entry->flags &= ~LEC_REMOTE_FLAG;
2166 if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) {
2167 entry->status = ESI_VC_PENDING;
2168 send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL);
2169 }
2170 DPRINTK("After update2\n");
2171 dump_arp_table(priv);
2172 out:
2173 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2174 }
2175
2176 /*
2177 * Notifies: Vcc setup ready
2178 */
2179 static void
2180 lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data,
2181 struct atm_vcc *vcc,
2182 void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb))
2183 {
2184 unsigned long flags;
2185 struct hlist_node *node;
2186 struct lec_arp_table *entry;
2187 int i, found_entry = 0;
2188
2189 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2190 if (ioc_data->receive == 2) {
2191 /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */
2192
2193 DPRINTK("LEC_ARP: Attaching mcast forward\n");
2194 #if 0
2195 entry = lec_arp_find(priv, bus_mac);
2196 if (!entry) {
2197 printk("LEC_ARP: Multicast entry not found!\n");
2198 goto out;
2199 }
2200 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2201 entry->recv_vcc = vcc;
2202 entry->old_recv_push = old_push;
2203 #endif
2204 entry = make_entry(priv, bus_mac);
2205 if (entry == NULL)
2206 goto out;
2207 del_timer(&entry->timer);
2208 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2209 entry->recv_vcc = vcc;
2210 entry->old_recv_push = old_push;
2211 hlist_add_head(&entry->next, &priv->mcast_fwds);
2212 goto out;
2213 } else if (ioc_data->receive == 1) {
2214 /*
2215 * Vcc which we don't want to make default vcc,
2216 * attach it anyway.
2217 */
2218 DPRINTK
2219 ("LEC_ARP:Attaching data direct, not default: "
2220 "%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",
2221 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2222 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2223 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2224 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2225 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2226 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2227 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2228 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2229 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2230 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2231 entry = make_entry(priv, bus_mac);
2232 if (entry == NULL)
2233 goto out;
2234 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2235 memset(entry->mac_addr, 0, ETH_ALEN);
2236 entry->recv_vcc = vcc;
2237 entry->old_recv_push = old_push;
2238 entry->status = ESI_UNKNOWN;
2239 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2240 entry->timer.function = lec_arp_expire_vcc;
2241 hlist_add_head(&entry->next, &priv->lec_no_forward);
2242 add_timer(&entry->timer);
2243 dump_arp_table(priv);
2244 goto out;
2245 }
2246 DPRINTK
2247 ("LEC_ARP:Attaching data direct, default: "
2248 "%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",
2249 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2250 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2251 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2252 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2253 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2254 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2255 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2256 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2257 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2258 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2259 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2260 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2261 if (memcmp
2262 (ioc_data->atm_addr, entry->atm_addr,
2263 ATM_ESA_LEN) == 0) {
2264 DPRINTK("LEC_ARP: Attaching data direct\n");
2265 DPRINTK("Currently -> Vcc: %d, Rvcc:%d\n",
2266 entry->vcc ? entry->vcc->vci : 0,
2267 entry->recv_vcc ? entry->recv_vcc->
2268 vci : 0);
2269 found_entry = 1;
2270 del_timer(&entry->timer);
2271 entry->vcc = vcc;
2272 entry->old_push = old_push;
2273 if (entry->status == ESI_VC_PENDING) {
2274 if (priv->maximum_unknown_frame_count
2275 == 0)
2276 entry->status =
2277 ESI_FORWARD_DIRECT;
2278 else {
2279 entry->timestamp = jiffies;
2280 entry->status =
2281 ESI_FLUSH_PENDING;
2282 #if 0
2283 send_to_lecd(priv, l_flush_xmt,
2284 NULL,
2285 entry->atm_addr,
2286 NULL);
2287 #endif
2288 }
2289 } else {
2290 /*
2291 * They were forming a connection
2292 * to us, and we to them. Our
2293 * ATM address is numerically lower
2294 * than theirs, so we make connection
2295 * we formed into default VCC (8.1.11).
2296 * Connection they made gets torn
2297 * down. This might confuse some
2298 * clients. Can be changed if
2299 * someone reports trouble...
2300 */
2301 ;
2302 }
2303 }
2304 }
2305 }
2306 if (found_entry) {
2307 DPRINTK("After vcc was added\n");
2308 dump_arp_table(priv);
2309 goto out;
2310 }
2311 /*
2312 * Not found, snatch address from first data packet that arrives
2313 * from this vcc
2314 */
2315 entry = make_entry(priv, bus_mac);
2316 if (!entry)
2317 goto out;
2318 entry->vcc = vcc;
2319 entry->old_push = old_push;
2320 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2321 memset(entry->mac_addr, 0, ETH_ALEN);
2322 entry->status = ESI_UNKNOWN;
2323 hlist_add_head(&entry->next, &priv->lec_arp_empty_ones);
2324 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2325 entry->timer.function = lec_arp_expire_vcc;
2326 add_timer(&entry->timer);
2327 DPRINTK("After vcc was added\n");
2328 dump_arp_table(priv);
2329 out:
2330 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2331 }
2332
2333 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id)
2334 {
2335 unsigned long flags;
2336 struct hlist_node *node;
2337 struct lec_arp_table *entry;
2338 int i;
2339
2340 DPRINTK("LEC:lec_flush_complete %lx\n", tran_id);
2341 restart:
2342 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2343 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2344 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2345 if (entry->flush_tran_id == tran_id
2346 && entry->status == ESI_FLUSH_PENDING) {
2347 struct sk_buff *skb;
2348 struct atm_vcc *vcc = entry->vcc;
2349
2350 lec_arp_hold(entry);
2351 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2352 while ((skb = skb_dequeue(&entry->tx_wait)) != NULL)
2353 lec_send(vcc, skb, entry->priv);
2354 entry->last_used = jiffies;
2355 entry->status = ESI_FORWARD_DIRECT;
2356 lec_arp_put(entry);
2357 DPRINTK("LEC_ARP: Flushed\n");
2358 goto restart;
2359 }
2360 }
2361 }
2362 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2363 dump_arp_table(priv);
2364 }
2365
2366 static void
2367 lec_set_flush_tran_id(struct lec_priv *priv,
2368 unsigned char *atm_addr, unsigned long tran_id)
2369 {
2370 unsigned long flags;
2371 struct hlist_node *node;
2372 struct lec_arp_table *entry;
2373 int i;
2374
2375 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2376 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
2377 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2378 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) {
2379 entry->flush_tran_id = tran_id;
2380 DPRINTK("Set flush transaction id to %lx for %p\n",
2381 tran_id, entry);
2382 }
2383 }
2384 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2385 }
2386
2387 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc)
2388 {
2389 unsigned long flags;
2390 unsigned char mac_addr[] = {
2391 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
2392 };
2393 struct lec_arp_table *to_add;
2394 struct lec_vcc_priv *vpriv;
2395 int err = 0;
2396
2397 if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL)))
2398 return -ENOMEM;
2399 vpriv->xoff = 0;
2400 vpriv->old_pop = vcc->pop;
2401 vcc->user_back = vpriv;
2402 vcc->pop = lec_pop;
2403 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2404 to_add = make_entry(priv, mac_addr);
2405 if (!to_add) {
2406 vcc->pop = vpriv->old_pop;
2407 kfree(vpriv);
2408 err = -ENOMEM;
2409 goto out;
2410 }
2411 memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN);
2412 to_add->status = ESI_FORWARD_DIRECT;
2413 to_add->flags |= LEC_PERMANENT_FLAG;
2414 to_add->vcc = vcc;
2415 to_add->old_push = vcc->push;
2416 vcc->push = lec_push;
2417 priv->mcast_vcc = vcc;
2418 lec_arp_add(priv, to_add);
2419 out:
2420 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2421 return err;
2422 }
2423
2424 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc)
2425 {
2426 unsigned long flags;
2427 struct hlist_node *node, *next;
2428 struct lec_arp_table *entry;
2429 int i;
2430
2431 DPRINTK("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci);
2432 dump_arp_table(priv);
2433
2434 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2435
2436 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2437 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
2438 if (vcc == entry->vcc) {
2439 lec_arp_remove(priv, entry);
2440 lec_arp_put(entry);
2441 if (priv->mcast_vcc == vcc) {
2442 priv->mcast_vcc = NULL;
2443 }
2444 }
2445 }
2446 }
2447
2448 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2449 if (entry->vcc == vcc) {
2450 lec_arp_clear_vccs(entry);
2451 del_timer(&entry->timer);
2452 hlist_del(&entry->next);
2453 lec_arp_put(entry);
2454 }
2455 }
2456
2457 hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) {
2458 if (entry->recv_vcc == vcc) {
2459 lec_arp_clear_vccs(entry);
2460 del_timer(&entry->timer);
2461 hlist_del(&entry->next);
2462 lec_arp_put(entry);
2463 }
2464 }
2465
2466 hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) {
2467 if (entry->recv_vcc == vcc) {
2468 lec_arp_clear_vccs(entry);
2469 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
2470 hlist_del(&entry->next);
2471 lec_arp_put(entry);
2472 }
2473 }
2474
2475 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2476 dump_arp_table(priv);
2477 }
2478
2479 static void
2480 lec_arp_check_empties(struct lec_priv *priv,
2481 struct atm_vcc *vcc, struct sk_buff *skb)
2482 {
2483 unsigned long flags;
2484 struct hlist_node *node, *next;
2485 struct lec_arp_table *entry, *tmp;
2486 struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data;
2487 unsigned char *src;
2488 #ifdef CONFIG_TR
2489 struct lecdatahdr_8025 *tr_hdr = (struct lecdatahdr_8025 *)skb->data;
2490
2491 if (priv->is_trdev)
2492 src = tr_hdr->h_source;
2493 else
2494 #endif
2495 src = hdr->h_source;
2496
2497 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2498 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2499 if (vcc == entry->vcc) {
2500 del_timer(&entry->timer);
2501 memcpy(entry->mac_addr, src, ETH_ALEN);
2502 entry->status = ESI_FORWARD_DIRECT;
2503 entry->last_used = jiffies;
2504 /* We might have got an entry */
2505 if ((tmp = lec_arp_find(priv, src))) {
2506 lec_arp_remove(priv, tmp);
2507 lec_arp_put(tmp);
2508 }
2509 hlist_del(&entry->next);
2510 lec_arp_add(priv, entry);
2511 goto out;
2512 }
2513 }
2514 DPRINTK("LEC_ARP: Arp_check_empties: entry not found!\n");
2515 out:
2516 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2517 }
2518
2519 MODULE_LICENSE("GPL");
Tomato firmware and modifications.