xref: /openbmc/linux/net/atm/lec.c (revision f42b3800)
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");
2491