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[ATM]: [lec] indent, comment and whitespace cleanup [continued]
[deliverable/linux.git] / net / atm / lec.c
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 static struct lane2_ops lane2_ops = {
111 lane2_resolve, /* resolve, spec 3.1.3 */
112 lane2_associate_req, /* associate_req, spec 3.1.4 */
113 NULL /* associate indicator, spec 3.1.5 */
114 };
115
116 static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
117
118 /* Device structures */
119 static struct net_device *dev_lec[MAX_LEC_ITF];
120
121 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
122 static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev)
123 {
124 struct ethhdr *eth;
125 char *buff;
126 struct lec_priv *priv;
127
128 /*
129 * Check if this is a BPDU. If so, ask zeppelin to send
130 * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit
131 * as the Config BPDU has
132 */
133 eth = (struct ethhdr *)skb->data;
134 buff = skb->data + skb->dev->hard_header_len;
135 if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) {
136 struct sock *sk;
137 struct sk_buff *skb2;
138 struct atmlec_msg *mesg;
139
140 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
141 if (skb2 == NULL)
142 return;
143 skb2->len = sizeof(struct atmlec_msg);
144 mesg = (struct atmlec_msg *)skb2->data;
145 mesg->type = l_topology_change;
146 buff += 4;
147 mesg->content.normal.flag = *buff & 0x01; /* 0x01 is topology change */
148
149 priv = (struct lec_priv *)dev->priv;
150 atm_force_charge(priv->lecd, skb2->truesize);
151 sk = sk_atm(priv->lecd);
152 skb_queue_tail(&sk->sk_receive_queue, skb2);
153 sk->sk_data_ready(sk, skb2->len);
154 }
155
156 return;
157 }
158 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
159
160 /*
161 * Modelled after tr_type_trans
162 * All multicast and ARE or STE frames go to BUS.
163 * Non source routed frames go by destination address.
164 * Last hop source routed frames go by destination address.
165 * Not last hop source routed frames go by _next_ route descriptor.
166 * Returns pointer to destination MAC address or fills in rdesc
167 * and returns NULL.
168 */
169 #ifdef CONFIG_TR
170 static unsigned char *get_tr_dst(unsigned char *packet, unsigned char *rdesc)
171 {
172 struct trh_hdr *trh;
173 int riflen, num_rdsc;
174
175 trh = (struct trh_hdr *)packet;
176 if (trh->daddr[0] & (uint8_t) 0x80)
177 return bus_mac; /* multicast */
178
179 if (trh->saddr[0] & TR_RII) {
180 riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8;
181 if ((ntohs(trh->rcf) >> 13) != 0)
182 return bus_mac; /* ARE or STE */
183 } else
184 return trh->daddr; /* not source routed */
185
186 if (riflen < 6)
187 return trh->daddr; /* last hop, source routed */
188
189 /* riflen is 6 or more, packet has more than one route descriptor */
190 num_rdsc = (riflen / 2) - 1;
191 memset(rdesc, 0, ETH_ALEN);
192 /* offset 4 comes from LAN destination field in LE control frames */
193 if (trh->rcf & htons((uint16_t) TR_RCF_DIR_BIT))
194 memcpy(&rdesc[4], &trh->rseg[num_rdsc - 2], sizeof(uint16_t));
195 else {
196 memcpy(&rdesc[4], &trh->rseg[1], sizeof(uint16_t));
197 rdesc[5] = ((ntohs(trh->rseg[0]) & 0x000f) | (rdesc[5] & 0xf0));
198 }
199
200 return NULL;
201 }
202 #endif /* CONFIG_TR */
203
204 /*
205 * Open/initialize the netdevice. This is called (in the current kernel)
206 * sometime after booting when the 'ifconfig' program is run.
207 *
208 * This routine should set everything up anew at each open, even
209 * registers that "should" only need to be set once at boot, so that
210 * there is non-reboot way to recover if something goes wrong.
211 */
212
213 static int lec_open(struct net_device *dev)
214 {
215 struct lec_priv *priv = (struct lec_priv *)dev->priv;
216
217 netif_start_queue(dev);
218 memset(&priv->stats, 0, sizeof(struct net_device_stats));
219
220 return 0;
221 }
222
223 static __inline__ void
224 lec_send(struct atm_vcc *vcc, struct sk_buff *skb, struct lec_priv *priv)
225 {
226 ATM_SKB(skb)->vcc = vcc;
227 ATM_SKB(skb)->atm_options = vcc->atm_options;
228
229 atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
230 if (vcc->send(vcc, skb) < 0) {
231 priv->stats.tx_dropped++;
232 return;
233 }
234
235 priv->stats.tx_packets++;
236 priv->stats.tx_bytes += skb->len;
237 }
238
239 static void lec_tx_timeout(struct net_device *dev)
240 {
241 printk(KERN_INFO "%s: tx timeout\n", dev->name);
242 dev->trans_start = jiffies;
243 netif_wake_queue(dev);
244 }
245
246 static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev)
247 {
248 struct sk_buff *skb2;
249 struct lec_priv *priv = (struct lec_priv *)dev->priv;
250 struct lecdatahdr_8023 *lec_h;
251 struct atm_vcc *vcc;
252 struct lec_arp_table *entry;
253 unsigned char *dst;
254 int min_frame_size;
255 #ifdef CONFIG_TR
256 unsigned char rdesc[ETH_ALEN]; /* Token Ring route descriptor */
257 #endif
258 int is_rdesc;
259 #if DUMP_PACKETS > 0
260 char buf[300];
261 int i = 0;
262 #endif /* DUMP_PACKETS >0 */
263
264 DPRINTK("lec_start_xmit called\n");
265 if (!priv->lecd) {
266 printk("%s:No lecd attached\n", dev->name);
267 priv->stats.tx_errors++;
268 netif_stop_queue(dev);
269 return -EUNATCH;
270 }
271
272 DPRINTK("skbuff head:%lx data:%lx tail:%lx end:%lx\n",
273 (long)skb->head, (long)skb->data, (long)skb->tail,
274 (long)skb->end);
275 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
276 if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0)
277 lec_handle_bridge(skb, dev);
278 #endif
279
280 /* Make sure we have room for lec_id */
281 if (skb_headroom(skb) < 2) {
282
283 DPRINTK("lec_start_xmit: reallocating skb\n");
284 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
285 kfree_skb(skb);
286 if (skb2 == NULL)
287 return 0;
288 skb = skb2;
289 }
290 skb_push(skb, 2);
291
292 /* Put le header to place, works for TokenRing too */
293 lec_h = (struct lecdatahdr_8023 *)skb->data;
294 lec_h->le_header = htons(priv->lecid);
295
296 #ifdef CONFIG_TR
297 /*
298 * Ugly. Use this to realign Token Ring packets for
299 * e.g. PCA-200E driver.
300 */
301 if (priv->is_trdev) {
302 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
303 kfree_skb(skb);
304 if (skb2 == NULL)
305 return 0;
306 skb = skb2;
307 }
308 #endif
309
310 #if DUMP_PACKETS > 0
311 printk("%s: send datalen:%ld lecid:%4.4x\n", dev->name,
312 skb->len, priv->lecid);
313 #if DUMP_PACKETS >= 2
314 for (i = 0; i < skb->len && i < 99; i++) {
315 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
316 }
317 #elif DUMP_PACKETS >= 1
318 for (i = 0; i < skb->len && i < 30; i++) {
319 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
320 }
321 #endif /* DUMP_PACKETS >= 1 */
322 if (i == skb->len)
323 printk("%s\n", buf);
324 else
325 printk("%s...\n", buf);
326 #endif /* DUMP_PACKETS > 0 */
327
328 /* Minimum ethernet-frame size */
329 #ifdef CONFIG_TR
330 if (priv->is_trdev)
331 min_frame_size = LEC_MINIMUM_8025_SIZE;
332 else
333 #endif
334 min_frame_size = LEC_MINIMUM_8023_SIZE;
335 if (skb->len < min_frame_size) {
336 if ((skb->len + skb_tailroom(skb)) < min_frame_size) {
337 skb2 = skb_copy_expand(skb, 0,
338 min_frame_size - skb->truesize,
339 GFP_ATOMIC);
340 dev_kfree_skb(skb);
341 if (skb2 == NULL) {
342 priv->stats.tx_dropped++;
343 return 0;
344 }
345 skb = skb2;
346 }
347 skb_put(skb, min_frame_size - skb->len);
348 }
349
350 /* Send to right vcc */
351 is_rdesc = 0;
352 dst = lec_h->h_dest;
353 #ifdef CONFIG_TR
354 if (priv->is_trdev) {
355 dst = get_tr_dst(skb->data + 2, rdesc);
356 if (dst == NULL) {
357 dst = rdesc;
358 is_rdesc = 1;
359 }
360 }
361 #endif
362 entry = NULL;
363 vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry);
364 DPRINTK("%s:vcc:%p vcc_flags:%x, entry:%p\n", dev->name,
365 vcc, vcc ? vcc->flags : 0, entry);
366 if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) {
367 if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) {
368 DPRINTK("%s:lec_start_xmit: queuing packet, ",
369 dev->name);
370 DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
371 lec_h->h_dest[0], lec_h->h_dest[1],
372 lec_h->h_dest[2], lec_h->h_dest[3],
373 lec_h->h_dest[4], lec_h->h_dest[5]);
374 skb_queue_tail(&entry->tx_wait, skb);
375 } else {
376 DPRINTK
377 ("%s:lec_start_xmit: tx queue full or no arp entry, dropping, ",
378 dev->name);
379 DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
380 lec_h->h_dest[0], lec_h->h_dest[1],
381 lec_h->h_dest[2], lec_h->h_dest[3],
382 lec_h->h_dest[4], lec_h->h_dest[5]);
383 priv->stats.tx_dropped++;
384 dev_kfree_skb(skb);
385 }
386 return 0;
387 }
388 #if DUMP_PACKETS > 0
389 printk("%s:sending to vpi:%d vci:%d\n", dev->name, vcc->vpi, vcc->vci);
390 #endif /* DUMP_PACKETS > 0 */
391
392 while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) {
393 DPRINTK("lec.c: emptying tx queue, ");
394 DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
395 lec_h->h_dest[0], lec_h->h_dest[1], lec_h->h_dest[2],
396 lec_h->h_dest[3], lec_h->h_dest[4], lec_h->h_dest[5]);
397 lec_send(vcc, skb2, priv);
398 }
399
400 lec_send(vcc, skb, priv);
401
402 if (!atm_may_send(vcc, 0)) {
403 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
404
405 vpriv->xoff = 1;
406 netif_stop_queue(dev);
407
408 /*
409 * vcc->pop() might have occurred in between, making
410 * the vcc usuable again. Since xmit is serialized,
411 * this is the only situation we have to re-test.
412 */
413
414 if (atm_may_send(vcc, 0))
415 netif_wake_queue(dev);
416 }
417
418 dev->trans_start = jiffies;
419 return 0;
420 }
421
422 /* The inverse routine to net_open(). */
423 static int lec_close(struct net_device *dev)
424 {
425 netif_stop_queue(dev);
426 return 0;
427 }
428
429 /*
430 * Get the current statistics.
431 * This may be called with the card open or closed.
432 */
433 static struct net_device_stats *lec_get_stats(struct net_device *dev)
434 {
435 return &((struct lec_priv *)dev->priv)->stats;
436 }
437
438 static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
439 {
440 unsigned long flags;
441 struct net_device *dev = (struct net_device *)vcc->proto_data;
442 struct lec_priv *priv = (struct lec_priv *)dev->priv;
443 struct atmlec_msg *mesg;
444 struct lec_arp_table *entry;
445 int i;
446 char *tmp; /* FIXME */
447
448 atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
449 mesg = (struct atmlec_msg *)skb->data;
450 tmp = skb->data;
451 tmp += sizeof(struct atmlec_msg);
452 DPRINTK("%s: msg from zeppelin:%d\n", dev->name, mesg->type);
453 switch (mesg->type) {
454 case l_set_mac_addr:
455 for (i = 0; i < 6; i++) {
456 dev->dev_addr[i] = mesg->content.normal.mac_addr[i];
457 }
458 break;
459 case l_del_mac_addr:
460 for (i = 0; i < 6; i++) {
461 dev->dev_addr[i] = 0;
462 }
463 break;
464 case l_addr_delete:
465 lec_addr_delete(priv, mesg->content.normal.atm_addr,
466 mesg->content.normal.flag);
467 break;
468 case l_topology_change:
469 priv->topology_change = mesg->content.normal.flag;
470 break;
471 case l_flush_complete:
472 lec_flush_complete(priv, mesg->content.normal.flag);
473 break;
474 case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */
475 spin_lock_irqsave(&priv->lec_arp_lock, flags);
476 entry = lec_arp_find(priv, mesg->content.normal.mac_addr);
477 lec_arp_remove(priv, entry);
478 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
479
480 if (mesg->content.normal.no_source_le_narp)
481 break;
482 /* FALL THROUGH */
483 case l_arp_update:
484 lec_arp_update(priv, mesg->content.normal.mac_addr,
485 mesg->content.normal.atm_addr,
486 mesg->content.normal.flag,
487 mesg->content.normal.targetless_le_arp);
488 DPRINTK("lec: in l_arp_update\n");
489 if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */
490 DPRINTK("lec: LANE2 3.1.5, got tlvs, size %d\n",
491 mesg->sizeoftlvs);
492 lane2_associate_ind(dev, mesg->content.normal.mac_addr,
493 tmp, mesg->sizeoftlvs);
494 }
495 break;
496 case l_config:
497 priv->maximum_unknown_frame_count =
498 mesg->content.config.maximum_unknown_frame_count;
499 priv->max_unknown_frame_time =
500 (mesg->content.config.max_unknown_frame_time * HZ);
501 priv->max_retry_count = mesg->content.config.max_retry_count;
502 priv->aging_time = (mesg->content.config.aging_time * HZ);
503 priv->forward_delay_time =
504 (mesg->content.config.forward_delay_time * HZ);
505 priv->arp_response_time =
506 (mesg->content.config.arp_response_time * HZ);
507 priv->flush_timeout = (mesg->content.config.flush_timeout * HZ);
508 priv->path_switching_delay =
509 (mesg->content.config.path_switching_delay * HZ);
510 priv->lane_version = mesg->content.config.lane_version; /* LANE2 */
511 priv->lane2_ops = NULL;
512 if (priv->lane_version > 1)
513 priv->lane2_ops = &lane2_ops;
514 if (dev->change_mtu(dev, mesg->content.config.mtu))
515 printk("%s: change_mtu to %d failed\n", dev->name,
516 mesg->content.config.mtu);
517 priv->is_proxy = mesg->content.config.is_proxy;
518 break;
519 case l_flush_tran_id:
520 lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr,
521 mesg->content.normal.flag);
522 break;
523 case l_set_lecid:
524 priv->lecid =
525 (unsigned short)(0xffff & mesg->content.normal.flag);
526 break;
527 case l_should_bridge:
528 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
529 {
530 struct net_bridge_fdb_entry *f;
531
532 DPRINTK
533 ("%s: bridge zeppelin asks about 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
534 dev->name, mesg->content.proxy.mac_addr[0],
535 mesg->content.proxy.mac_addr[1],
536 mesg->content.proxy.mac_addr[2],
537 mesg->content.proxy.mac_addr[3],
538 mesg->content.proxy.mac_addr[4],
539 mesg->content.proxy.mac_addr[5]);
540
541 if (br_fdb_get_hook == NULL || dev->br_port == NULL)
542 break;
543
544 f = br_fdb_get_hook(dev->br_port->br,
545 mesg->content.proxy.mac_addr);
546 if (f != NULL && f->dst->dev != dev
547 && f->dst->state == BR_STATE_FORWARDING) {
548 /* hit from bridge table, send LE_ARP_RESPONSE */
549 struct sk_buff *skb2;
550 struct sock *sk;
551
552 DPRINTK
553 ("%s: entry found, responding to zeppelin\n",
554 dev->name);
555 skb2 =
556 alloc_skb(sizeof(struct atmlec_msg),
557 GFP_ATOMIC);
558 if (skb2 == NULL) {
559 br_fdb_put_hook(f);
560 break;
561 }
562 skb2->len = sizeof(struct atmlec_msg);
563 memcpy(skb2->data, mesg,
564 sizeof(struct atmlec_msg));
565 atm_force_charge(priv->lecd, skb2->truesize);
566 sk = sk_atm(priv->lecd);
567 skb_queue_tail(&sk->sk_receive_queue, skb2);
568 sk->sk_data_ready(sk, skb2->len);
569 }
570 if (f != NULL)
571 br_fdb_put_hook(f);
572 }
573 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
574 break;
575 default:
576 printk("%s: Unknown message type %d\n", dev->name, mesg->type);
577 dev_kfree_skb(skb);
578 return -EINVAL;
579 }
580 dev_kfree_skb(skb);
581 return 0;
582 }
583
584 static void lec_atm_close(struct atm_vcc *vcc)
585 {
586 struct sk_buff *skb;
587 struct net_device *dev = (struct net_device *)vcc->proto_data;
588 struct lec_priv *priv = (struct lec_priv *)dev->priv;
589
590 priv->lecd = NULL;
591 /* Do something needful? */
592
593 netif_stop_queue(dev);
594 lec_arp_destroy(priv);
595
596 if (skb_peek(&sk_atm(vcc)->sk_receive_queue))
597 printk("%s lec_atm_close: closing with messages pending\n",
598 dev->name);
599 while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue)) != NULL) {
600 atm_return(vcc, skb->truesize);
601 dev_kfree_skb(skb);
602 }
603
604 printk("%s: Shut down!\n", dev->name);
605 module_put(THIS_MODULE);
606 }
607
608 static struct atmdev_ops lecdev_ops = {
609 .close = lec_atm_close,
610 .send = lec_atm_send
611 };
612
613 static struct atm_dev lecatm_dev = {
614 .ops = &lecdev_ops,
615 .type = "lec",
616 .number = 999, /* dummy device number */
617 .lock = SPIN_LOCK_UNLOCKED
618 };
619
620 /*
621 * LANE2: new argument struct sk_buff *data contains
622 * the LE_ARP based TLVs introduced in the LANE2 spec
623 */
624 static int
625 send_to_lecd(struct lec_priv *priv, atmlec_msg_type type,
626 unsigned char *mac_addr, unsigned char *atm_addr,
627 struct sk_buff *data)
628 {
629 struct sock *sk;
630 struct sk_buff *skb;
631 struct atmlec_msg *mesg;
632
633 if (!priv || !priv->lecd) {
634 return -1;
635 }
636 skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
637 if (!skb)
638 return -1;
639 skb->len = sizeof(struct atmlec_msg);
640 mesg = (struct atmlec_msg *)skb->data;
641 memset(mesg, 0, sizeof(struct atmlec_msg));
642 mesg->type = type;
643 if (data != NULL)
644 mesg->sizeoftlvs = data->len;
645 if (mac_addr)
646 memcpy(&mesg->content.normal.mac_addr, mac_addr, ETH_ALEN);
647 else
648 mesg->content.normal.targetless_le_arp = 1;
649 if (atm_addr)
650 memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN);
651
652 atm_force_charge(priv->lecd, skb->truesize);
653 sk = sk_atm(priv->lecd);
654 skb_queue_tail(&sk->sk_receive_queue, skb);
655 sk->sk_data_ready(sk, skb->len);
656
657 if (data != NULL) {
658 DPRINTK("lec: about to send %d bytes of data\n", data->len);
659 atm_force_charge(priv->lecd, data->truesize);
660 skb_queue_tail(&sk->sk_receive_queue, data);
661 sk->sk_data_ready(sk, skb->len);
662 }
663
664 return 0;
665 }
666
667 /* shamelessly stolen from drivers/net/net_init.c */
668 static int lec_change_mtu(struct net_device *dev, int new_mtu)
669 {
670 if ((new_mtu < 68) || (new_mtu > 18190))
671 return -EINVAL;
672 dev->mtu = new_mtu;
673 return 0;
674 }
675
676 static void lec_set_multicast_list(struct net_device *dev)
677 {
678 /*
679 * by default, all multicast frames arrive over the bus.
680 * eventually support selective multicast service
681 */
682 return;
683 }
684
685 static void lec_init(struct net_device *dev)
686 {
687 dev->change_mtu = lec_change_mtu;
688 dev->open = lec_open;
689 dev->stop = lec_close;
690 dev->hard_start_xmit = lec_start_xmit;
691 dev->tx_timeout = lec_tx_timeout;
692
693 dev->get_stats = lec_get_stats;
694 dev->set_multicast_list = lec_set_multicast_list;
695 dev->do_ioctl = NULL;
696 printk("%s: Initialized!\n", dev->name);
697 return;
698 }
699
700 static unsigned char lec_ctrl_magic[] = {
701 0xff,
702 0x00,
703 0x01,
704 0x01
705 };
706
707 #define LEC_DATA_DIRECT_8023 2
708 #define LEC_DATA_DIRECT_8025 3
709
710 static int lec_is_data_direct(struct atm_vcc *vcc)
711 {
712 return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) ||
713 (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025));
714 }
715
716 static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb)
717 {
718 unsigned long flags;
719 struct net_device *dev = (struct net_device *)vcc->proto_data;
720 struct lec_priv *priv = (struct lec_priv *)dev->priv;
721
722 #if DUMP_PACKETS >0
723 int i = 0;
724 char buf[300];
725
726 printk("%s: lec_push vcc vpi:%d vci:%d\n", dev->name,
727 vcc->vpi, vcc->vci);
728 #endif
729 if (!skb) {
730 DPRINTK("%s: null skb\n", dev->name);
731 lec_vcc_close(priv, vcc);
732 return;
733 }
734 #if DUMP_PACKETS > 0
735 printk("%s: rcv datalen:%ld lecid:%4.4x\n", dev->name,
736 skb->len, priv->lecid);
737 #if DUMP_PACKETS >= 2
738 for (i = 0; i < skb->len && i < 99; i++) {
739 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
740 }
741 #elif DUMP_PACKETS >= 1
742 for (i = 0; i < skb->len && i < 30; i++) {
743 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
744 }
745 #endif /* DUMP_PACKETS >= 1 */
746 if (i == skb->len)
747 printk("%s\n", buf);
748 else
749 printk("%s...\n", buf);
750 #endif /* DUMP_PACKETS > 0 */
751 if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) { /* Control frame, to daemon */
752 struct sock *sk = sk_atm(vcc);
753
754 DPRINTK("%s: To daemon\n", dev->name);
755 skb_queue_tail(&sk->sk_receive_queue, skb);
756 sk->sk_data_ready(sk, skb->len);
757 } else { /* Data frame, queue to protocol handlers */
758 struct lec_arp_table *entry;
759 unsigned char *src, *dst;
760
761 atm_return(vcc, skb->truesize);
762 if (*(uint16_t *) skb->data == htons(priv->lecid) ||
763 !priv->lecd || !(dev->flags & IFF_UP)) {
764 /*
765 * Probably looping back, or if lecd is missing,
766 * lecd has gone down
767 */
768 DPRINTK("Ignoring frame...\n");
769 dev_kfree_skb(skb);
770 return;
771 }
772 #ifdef CONFIG_TR
773 if (priv->is_trdev)
774 dst = ((struct lecdatahdr_8025 *)skb->data)->h_dest;
775 else
776 #endif
777 dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest;
778
779 /*
780 * If this is a Data Direct VCC, and the VCC does not match
781 * the LE_ARP cache entry, delete the LE_ARP cache entry.
782 */
783 spin_lock_irqsave(&priv->lec_arp_lock, flags);
784 if (lec_is_data_direct(vcc)) {
785 #ifdef CONFIG_TR
786 if (priv->is_trdev)
787 src =
788 ((struct lecdatahdr_8025 *)skb->data)->
789 h_source;
790 else
791 #endif
792 src =
793 ((struct lecdatahdr_8023 *)skb->data)->
794 h_source;
795 entry = lec_arp_find(priv, src);
796 if (entry && entry->vcc != vcc) {
797 lec_arp_remove(priv, entry);
798 kfree(entry);
799 }
800 }
801 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
802
803 if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */
804 !priv->is_proxy && /* Proxy wants all the packets */
805 memcmp(dst, dev->dev_addr, dev->addr_len)) {
806 dev_kfree_skb(skb);
807 return;
808 }
809 if (priv->lec_arp_empty_ones) {
810 lec_arp_check_empties(priv, vcc, skb);
811 }
812 skb->dev = dev;
813 skb_pull(skb, 2); /* skip lec_id */
814 #ifdef CONFIG_TR
815 if (priv->is_trdev)
816 skb->protocol = tr_type_trans(skb, dev);
817 else
818 #endif
819 skb->protocol = eth_type_trans(skb, dev);
820 priv->stats.rx_packets++;
821 priv->stats.rx_bytes += skb->len;
822 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
823 netif_rx(skb);
824 }
825 }
826
827 static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb)
828 {
829 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
830 struct net_device *dev = skb->dev;
831
832 if (vpriv == NULL) {
833 printk("lec_pop(): vpriv = NULL!?!?!?\n");
834 return;
835 }
836
837 vpriv->old_pop(vcc, skb);
838
839 if (vpriv->xoff && atm_may_send(vcc, 0)) {
840 vpriv->xoff = 0;
841 if (netif_running(dev) && netif_queue_stopped(dev))
842 netif_wake_queue(dev);
843 }
844 }
845
846 static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg)
847 {
848 struct lec_vcc_priv *vpriv;
849 int bytes_left;
850 struct atmlec_ioc ioc_data;
851
852 /* Lecd must be up in this case */
853 bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc));
854 if (bytes_left != 0) {
855 printk
856 ("lec: lec_vcc_attach, copy from user failed for %d bytes\n",
857 bytes_left);
858 }
859 if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF ||
860 !dev_lec[ioc_data.dev_num])
861 return -EINVAL;
862 if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL)))
863 return -ENOMEM;
864 vpriv->xoff = 0;
865 vpriv->old_pop = vcc->pop;
866 vcc->user_back = vpriv;
867 vcc->pop = lec_pop;
868 lec_vcc_added(dev_lec[ioc_data.dev_num]->priv,
869 &ioc_data, vcc, vcc->push);
870 vcc->proto_data = dev_lec[ioc_data.dev_num];
871 vcc->push = lec_push;
872 return 0;
873 }
874
875 static int lec_mcast_attach(struct atm_vcc *vcc, int arg)
876 {
877 if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg])
878 return -EINVAL;
879 vcc->proto_data = dev_lec[arg];
880 return (lec_mcast_make((struct lec_priv *)dev_lec[arg]->priv, vcc));
881 }
882
883 /* Initialize device. */
884 static int lecd_attach(struct atm_vcc *vcc, int arg)
885 {
886 int i;
887 struct lec_priv *priv;
888
889 if (arg < 0)
890 i = 0;
891 else
892 i = arg;
893 #ifdef CONFIG_TR
894 if (arg >= MAX_LEC_ITF)
895 return -EINVAL;
896 #else /* Reserve the top NUM_TR_DEVS for TR */
897 if (arg >= (MAX_LEC_ITF - NUM_TR_DEVS))
898 return -EINVAL;
899 #endif
900 if (!dev_lec[i]) {
901 int is_trdev, size;
902
903 is_trdev = 0;
904 if (i >= (MAX_LEC_ITF - NUM_TR_DEVS))
905 is_trdev = 1;
906
907 size = sizeof(struct lec_priv);
908 #ifdef CONFIG_TR
909 if (is_trdev)
910 dev_lec[i] = alloc_trdev(size);
911 else
912 #endif
913 dev_lec[i] = alloc_etherdev(size);
914 if (!dev_lec[i])
915 return -ENOMEM;
916 snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i);
917 if (register_netdev(dev_lec[i])) {
918 free_netdev(dev_lec[i]);
919 return -EINVAL;
920 }
921
922 priv = dev_lec[i]->priv;
923 priv->is_trdev = is_trdev;
924 lec_init(dev_lec[i]);
925 } else {
926 priv = dev_lec[i]->priv;
927 if (priv->lecd)
928 return -EADDRINUSE;
929 }
930 lec_arp_init(priv);
931 priv->itfnum = i; /* LANE2 addition */
932 priv->lecd = vcc;
933 vcc->dev = &lecatm_dev;
934 vcc_insert_socket(sk_atm(vcc));
935
936 vcc->proto_data = dev_lec[i];
937 set_bit(ATM_VF_META, &vcc->flags);
938 set_bit(ATM_VF_READY, &vcc->flags);
939
940 /* Set default values to these variables */
941 priv->maximum_unknown_frame_count = 1;
942 priv->max_unknown_frame_time = (1 * HZ);
943 priv->vcc_timeout_period = (1200 * HZ);
944 priv->max_retry_count = 1;
945 priv->aging_time = (300 * HZ);
946 priv->forward_delay_time = (15 * HZ);
947 priv->topology_change = 0;
948 priv->arp_response_time = (1 * HZ);
949 priv->flush_timeout = (4 * HZ);
950 priv->path_switching_delay = (6 * HZ);
951
952 if (dev_lec[i]->flags & IFF_UP) {
953 netif_start_queue(dev_lec[i]);
954 }
955 __module_get(THIS_MODULE);
956 return i;
957 }
958
959 #ifdef CONFIG_PROC_FS
960 static char *lec_arp_get_status_string(unsigned char status)
961 {
962 static char *lec_arp_status_string[] = {
963 "ESI_UNKNOWN ",
964 "ESI_ARP_PENDING ",
965 "ESI_VC_PENDING ",
966 "<Undefined> ",
967 "ESI_FLUSH_PENDING ",
968 "ESI_FORWARD_DIRECT"
969 };
970
971 if (status > ESI_FORWARD_DIRECT)
972 status = 3; /* ESI_UNDEFINED */
973 return lec_arp_status_string[status];
974 }
975
976 static void lec_info(struct seq_file *seq, struct lec_arp_table *entry)
977 {
978 int i;
979
980 for (i = 0; i < ETH_ALEN; i++)
981 seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff);
982 seq_printf(seq, " ");
983 for (i = 0; i < ATM_ESA_LEN; i++)
984 seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff);
985 seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status),
986 entry->flags & 0xffff);
987 if (entry->vcc)
988 seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci);
989 else
990 seq_printf(seq, " ");
991 if (entry->recv_vcc) {
992 seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi,
993 entry->recv_vcc->vci);
994 }
995 seq_putc(seq, '\n');
996 }
997
998 struct lec_state {
999 unsigned long flags;
1000 struct lec_priv *locked;
1001 struct lec_arp_table *entry;
1002 struct net_device *dev;
1003 int itf;
1004 int arp_table;
1005 int misc_table;
1006 };
1007
1008 static void *lec_tbl_walk(struct lec_state *state, struct lec_arp_table *tbl,
1009 loff_t *l)
1010 {
1011 struct lec_arp_table *e = state->entry;
1012
1013 if (!e)
1014 e = tbl;
1015 if (e == (void *)1) {
1016 e = tbl;
1017 --*l;
1018 }
1019 for (; e; e = e->next) {
1020 if (--*l < 0)
1021 break;
1022 }
1023 state->entry = e;
1024 return (*l < 0) ? state : NULL;
1025 }
1026
1027 static void *lec_arp_walk(struct lec_state *state, loff_t *l,
1028 struct lec_priv *priv)
1029 {
1030 void *v = NULL;
1031 int p;
1032
1033 for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) {
1034 v = lec_tbl_walk(state, priv->lec_arp_tables[p], l);
1035 if (v)
1036 break;
1037 }
1038 state->arp_table = p;
1039 return v;
1040 }
1041
1042 static void *lec_misc_walk(struct lec_state *state, loff_t *l,
1043 struct lec_priv *priv)
1044 {
1045 struct lec_arp_table *lec_misc_tables[] = {
1046 priv->lec_arp_empty_ones,
1047 priv->lec_no_forward,
1048 priv->mcast_fwds
1049 };
1050 void *v = NULL;
1051 int q;
1052
1053 for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) {
1054 v = lec_tbl_walk(state, lec_misc_tables[q], l);
1055 if (v)
1056 break;
1057 }
1058 state->misc_table = q;
1059 return v;
1060 }
1061
1062 static void *lec_priv_walk(struct lec_state *state, loff_t *l,
1063 struct lec_priv *priv)
1064 {
1065 if (!state->locked) {
1066 state->locked = priv;
1067 spin_lock_irqsave(&priv->lec_arp_lock, state->flags);
1068 }
1069 if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) {
1070 spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags);
1071 state->locked = NULL;
1072 /* Partial state reset for the next time we get called */
1073 state->arp_table = state->misc_table = 0;
1074 }
1075 return state->locked;
1076 }
1077
1078 static void *lec_itf_walk(struct lec_state *state, loff_t *l)
1079 {
1080 struct net_device *dev;
1081 void *v;
1082
1083 dev = state->dev ? state->dev : dev_lec[state->itf];
1084 v = (dev && dev->priv) ? lec_priv_walk(state, l, dev->priv) : NULL;
1085 if (!v && dev) {
1086 dev_put(dev);
1087 /* Partial state reset for the next time we get called */
1088 dev = NULL;
1089 }
1090 state->dev = dev;
1091 return v;
1092 }
1093
1094 static void *lec_get_idx(struct lec_state *state, loff_t l)
1095 {
1096 void *v = NULL;
1097
1098 for (; state->itf < MAX_LEC_ITF; state->itf++) {
1099 v = lec_itf_walk(state, &l);
1100 if (v)
1101 break;
1102 }
1103 return v;
1104 }
1105
1106 static void *lec_seq_start(struct seq_file *seq, loff_t *pos)
1107 {
1108 struct lec_state *state = seq->private;
1109
1110 state->itf = 0;
1111 state->dev = NULL;
1112 state->locked = NULL;
1113 state->arp_table = 0;
1114 state->misc_table = 0;
1115 state->entry = (void *)1;
1116
1117 return *pos ? lec_get_idx(state, *pos) : (void *)1;
1118 }
1119
1120 static void lec_seq_stop(struct seq_file *seq, void *v)
1121 {
1122 struct lec_state *state = seq->private;
1123
1124 if (state->dev) {
1125 spin_unlock_irqrestore(&state->locked->lec_arp_lock,
1126 state->flags);
1127 dev_put(state->dev);
1128 }
1129 }
1130
1131 static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1132 {
1133 struct lec_state *state = seq->private;
1134
1135 v = lec_get_idx(state, 1);
1136 *pos += !!PTR_ERR(v);
1137 return v;
1138 }
1139
1140 static int lec_seq_show(struct seq_file *seq, void *v)
1141 {
1142 static char lec_banner[] = "Itf MAC ATM destination"
1143 " Status Flags "
1144 "VPI/VCI Recv VPI/VCI\n";
1145
1146 if (v == (void *)1)
1147 seq_puts(seq, lec_banner);
1148 else {
1149 struct lec_state *state = seq->private;
1150 struct net_device *dev = state->dev;
1151
1152 seq_printf(seq, "%s ", dev->name);
1153 lec_info(seq, state->entry);
1154 }
1155 return 0;
1156 }
1157
1158 static struct seq_operations lec_seq_ops = {
1159 .start = lec_seq_start,
1160 .next = lec_seq_next,
1161 .stop = lec_seq_stop,
1162 .show = lec_seq_show,
1163 };
1164
1165 static int lec_seq_open(struct inode *inode, struct file *file)
1166 {
1167 struct lec_state *state;
1168 struct seq_file *seq;
1169 int rc = -EAGAIN;
1170
1171 state = kmalloc(sizeof(*state), GFP_KERNEL);
1172 if (!state) {
1173 rc = -ENOMEM;
1174 goto out;
1175 }
1176
1177 rc = seq_open(file, &lec_seq_ops);
1178 if (rc)
1179 goto out_kfree;
1180 seq = file->private_data;
1181 seq->private = state;
1182 out:
1183 return rc;
1184
1185 out_kfree:
1186 kfree(state);
1187 goto out;
1188 }
1189
1190 static int lec_seq_release(struct inode *inode, struct file *file)
1191 {
1192 return seq_release_private(inode, file);
1193 }
1194
1195 static struct file_operations lec_seq_fops = {
1196 .owner = THIS_MODULE,
1197 .open = lec_seq_open,
1198 .read = seq_read,
1199 .llseek = seq_lseek,
1200 .release = lec_seq_release,
1201 };
1202 #endif
1203
1204 static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1205 {
1206 struct atm_vcc *vcc = ATM_SD(sock);
1207 int err = 0;
1208
1209 switch (cmd) {
1210 case ATMLEC_CTRL:
1211 case ATMLEC_MCAST:
1212 case ATMLEC_DATA:
1213 if (!capable(CAP_NET_ADMIN))
1214 return -EPERM;
1215 break;
1216 default:
1217 return -ENOIOCTLCMD;
1218 }
1219
1220 switch (cmd) {
1221 case ATMLEC_CTRL:
1222 err = lecd_attach(vcc, (int)arg);
1223 if (err >= 0)
1224 sock->state = SS_CONNECTED;
1225 break;
1226 case ATMLEC_MCAST:
1227 err = lec_mcast_attach(vcc, (int)arg);
1228 break;
1229 case ATMLEC_DATA:
1230 err = lec_vcc_attach(vcc, (void __user *)arg);
1231 break;
1232 }
1233
1234 return err;
1235 }
1236
1237 static struct atm_ioctl lane_ioctl_ops = {
1238 .owner = THIS_MODULE,
1239 .ioctl = lane_ioctl,
1240 };
1241
1242 static int __init lane_module_init(void)
1243 {
1244 #ifdef CONFIG_PROC_FS
1245 struct proc_dir_entry *p;
1246
1247 p = create_proc_entry("lec", S_IRUGO, atm_proc_root);
1248 if (p)
1249 p->proc_fops = &lec_seq_fops;
1250 #endif
1251
1252 register_atm_ioctl(&lane_ioctl_ops);
1253 printk("lec.c: " __DATE__ " " __TIME__ " initialized\n");
1254 return 0;
1255 }
1256
1257 static void __exit lane_module_cleanup(void)
1258 {
1259 int i;
1260 struct lec_priv *priv;
1261
1262 remove_proc_entry("lec", atm_proc_root);
1263
1264 deregister_atm_ioctl(&lane_ioctl_ops);
1265
1266 for (i = 0; i < MAX_LEC_ITF; i++) {
1267 if (dev_lec[i] != NULL) {
1268 priv = (struct lec_priv *)dev_lec[i]->priv;
1269 unregister_netdev(dev_lec[i]);
1270 free_netdev(dev_lec[i]);
1271 dev_lec[i] = NULL;
1272 }
1273 }
1274
1275 return;
1276 }
1277
1278 module_init(lane_module_init);
1279 module_exit(lane_module_cleanup);
1280
1281 /*
1282 * LANE2: 3.1.3, LE_RESOLVE.request
1283 * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs.
1284 * If sizeoftlvs == NULL the default TLVs associated with with this
1285 * lec will be used.
1286 * If dst_mac == NULL, targetless LE_ARP will be sent
1287 */
1288 static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force,
1289 u8 **tlvs, u32 *sizeoftlvs)
1290 {
1291 unsigned long flags;
1292 struct lec_priv *priv = (struct lec_priv *)dev->priv;
1293 struct lec_arp_table *table;
1294 struct sk_buff *skb;
1295 int retval;
1296
1297 if (force == 0) {
1298 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1299 table = lec_arp_find(priv, dst_mac);
1300 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1301 if (table == NULL)
1302 return -1;
1303
1304 *tlvs = kmalloc(table->sizeoftlvs, GFP_ATOMIC);
1305 if (*tlvs == NULL)
1306 return -1;
1307
1308 memcpy(*tlvs, table->tlvs, table->sizeoftlvs);
1309 *sizeoftlvs = table->sizeoftlvs;
1310
1311 return 0;
1312 }
1313
1314 if (sizeoftlvs == NULL)
1315 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL);
1316
1317 else {
1318 skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC);
1319 if (skb == NULL)
1320 return -1;
1321 skb->len = *sizeoftlvs;
1322 memcpy(skb->data, *tlvs, *sizeoftlvs);
1323 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb);
1324 }
1325 return retval;
1326 }
1327
1328 /*
1329 * LANE2: 3.1.4, LE_ASSOCIATE.request
1330 * Associate the *tlvs with the *lan_dst address.
1331 * Will overwrite any previous association
1332 * Returns 1 for success, 0 for failure (out of memory)
1333 *
1334 */
1335 static int lane2_associate_req(struct net_device *dev, u8 *lan_dst,
1336 u8 *tlvs, u32 sizeoftlvs)
1337 {
1338 int retval;
1339 struct sk_buff *skb;
1340 struct lec_priv *priv = (struct lec_priv *)dev->priv;
1341
1342 if (compare_ether_addr(lan_dst, dev->dev_addr))
1343 return (0); /* not our mac address */
1344
1345 kfree(priv->tlvs); /* NULL if there was no previous association */
1346
1347 priv->tlvs = kmalloc(sizeoftlvs, GFP_KERNEL);
1348 if (priv->tlvs == NULL)
1349 return (0);
1350 priv->sizeoftlvs = sizeoftlvs;
1351 memcpy(priv->tlvs, tlvs, sizeoftlvs);
1352
1353 skb = alloc_skb(sizeoftlvs, GFP_ATOMIC);
1354 if (skb == NULL)
1355 return 0;
1356 skb->len = sizeoftlvs;
1357 memcpy(skb->data, tlvs, sizeoftlvs);
1358 retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb);
1359 if (retval != 0)
1360 printk("lec.c: lane2_associate_req() failed\n");
1361 /*
1362 * If the previous association has changed we must
1363 * somehow notify other LANE entities about the change
1364 */
1365 return (1);
1366 }
1367
1368 /*
1369 * LANE2: 3.1.5, LE_ASSOCIATE.indication
1370 *
1371 */
1372 static void lane2_associate_ind(struct net_device *dev, u8 *mac_addr,
1373 u8 *tlvs, u32 sizeoftlvs)
1374 {
1375 #if 0
1376 int i = 0;
1377 #endif
1378 struct lec_priv *priv = (struct lec_priv *)dev->priv;
1379 #if 0 /*
1380 * Why have the TLVs in LE_ARP entries
1381 * since we do not use them? When you
1382 * uncomment this code, make sure the
1383 * TLVs get freed when entry is killed
1384 */
1385 struct lec_arp_table *entry = lec_arp_find(priv, mac_addr);
1386
1387 if (entry == NULL)
1388 return; /* should not happen */
1389
1390 kfree(entry->tlvs);
1391
1392 entry->tlvs = kmalloc(sizeoftlvs, GFP_KERNEL);
1393 if (entry->tlvs == NULL)
1394 return;
1395
1396 entry->sizeoftlvs = sizeoftlvs;
1397 memcpy(entry->tlvs, tlvs, sizeoftlvs);
1398 #endif
1399 #if 0
1400 printk("lec.c: lane2_associate_ind()\n");
1401 printk("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs);
1402 while (i < sizeoftlvs)
1403 printk("%02x ", tlvs[i++]);
1404
1405 printk("\n");
1406 #endif
1407
1408 /* tell MPOA about the TLVs we saw */
1409 if (priv->lane2_ops && priv->lane2_ops->associate_indicator) {
1410 priv->lane2_ops->associate_indicator(dev, mac_addr,
1411 tlvs, sizeoftlvs);
1412 }
1413 return;
1414 }
1415
1416 /*
1417 * Here starts what used to lec_arpc.c
1418 *
1419 * lec_arpc.c was added here when making
1420 * lane client modular. October 1997
1421 */
1422
1423 #include <linux/types.h>
1424 #include <linux/sched.h>
1425 #include <linux/timer.h>
1426 #include <asm/param.h>
1427 #include <asm/atomic.h>
1428 #include <linux/inetdevice.h>
1429 #include <net/route.h>
1430
1431 #if 0
1432 #define DPRINTK(format,args...)
1433 /*
1434 #define DPRINTK printk
1435 */
1436 #endif
1437 #define DEBUG_ARP_TABLE 0
1438
1439 #define LEC_ARP_REFRESH_INTERVAL (3*HZ)
1440
1441 static void lec_arp_check_expire(unsigned long data);
1442 static void lec_arp_expire_arp(unsigned long data);
1443
1444 /*
1445 * Arp table funcs
1446 */
1447
1448 #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE -1))
1449
1450 /*
1451 * Initialization of arp-cache
1452 */
1453 static void lec_arp_init(struct lec_priv *priv)
1454 {
1455 unsigned short i;
1456
1457 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1458 priv->lec_arp_tables[i] = NULL;
1459 }
1460 spin_lock_init(&priv->lec_arp_lock);
1461 init_timer(&priv->lec_arp_timer);
1462 priv->lec_arp_timer.expires = jiffies + LEC_ARP_REFRESH_INTERVAL;
1463 priv->lec_arp_timer.data = (unsigned long)priv;
1464 priv->lec_arp_timer.function = lec_arp_check_expire;
1465 add_timer(&priv->lec_arp_timer);
1466 }
1467
1468 static void lec_arp_clear_vccs(struct lec_arp_table *entry)
1469 {
1470 if (entry->vcc) {
1471 struct atm_vcc *vcc = entry->vcc;
1472 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
1473 struct net_device *dev = (struct net_device *)vcc->proto_data;
1474
1475 vcc->pop = vpriv->old_pop;
1476 if (vpriv->xoff)
1477 netif_wake_queue(dev);
1478 kfree(vpriv);
1479 vcc->user_back = NULL;
1480 vcc->push = entry->old_push;
1481 vcc_release_async(vcc, -EPIPE);
1482 vcc = NULL;
1483 }
1484 if (entry->recv_vcc) {
1485 entry->recv_vcc->push = entry->old_recv_push;
1486 vcc_release_async(entry->recv_vcc, -EPIPE);
1487 entry->recv_vcc = NULL;
1488 }
1489 }
1490
1491 /*
1492 * Insert entry to lec_arp_table
1493 * LANE2: Add to the end of the list to satisfy 8.1.13
1494 */
1495 static inline void
1496 lec_arp_add(struct lec_priv *priv, struct lec_arp_table *to_add)
1497 {
1498 unsigned short place;
1499 struct lec_arp_table *tmp;
1500
1501 place = HASH(to_add->mac_addr[ETH_ALEN - 1]);
1502 tmp = priv->lec_arp_tables[place];
1503 to_add->next = NULL;
1504 if (tmp == NULL)
1505 priv->lec_arp_tables[place] = to_add;
1506
1507 else { /* add to the end */
1508 while (tmp->next)
1509 tmp = tmp->next;
1510 tmp->next = to_add;
1511 }
1512
1513 DPRINTK("LEC_ARP: Added entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1514 0xff & to_add->mac_addr[0], 0xff & to_add->mac_addr[1],
1515 0xff & to_add->mac_addr[2], 0xff & to_add->mac_addr[3],
1516 0xff & to_add->mac_addr[4], 0xff & to_add->mac_addr[5]);
1517 }
1518
1519 /*
1520 * Remove entry from lec_arp_table
1521 */
1522 static int
1523 lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove)
1524 {
1525 unsigned short place;
1526 struct lec_arp_table *tmp;
1527 int remove_vcc = 1;
1528
1529 if (!to_remove) {
1530 return -1;
1531 }
1532 place = HASH(to_remove->mac_addr[ETH_ALEN - 1]);
1533 tmp = priv->lec_arp_tables[place];
1534 if (tmp == to_remove) {
1535 priv->lec_arp_tables[place] = tmp->next;
1536 } else {
1537 while (tmp && tmp->next != to_remove) {
1538 tmp = tmp->next;
1539 }
1540 if (!tmp) { /* Entry was not found */
1541 return -1;
1542 }
1543 }
1544 tmp->next = to_remove->next;
1545 del_timer(&to_remove->timer);
1546
1547 /* If this is the only MAC connected to this VCC, also tear down
1548 the VCC */
1549 if (to_remove->status >= ESI_FLUSH_PENDING) {
1550 /*
1551 * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT
1552 */
1553 for (place = 0; place < LEC_ARP_TABLE_SIZE; place++) {
1554 for (tmp = priv->lec_arp_tables[place]; tmp != NULL;
1555 tmp = tmp->next) {
1556 if (memcmp
1557 (tmp->atm_addr, to_remove->atm_addr,
1558 ATM_ESA_LEN) == 0) {
1559 remove_vcc = 0;
1560 break;
1561 }
1562 }
1563 }
1564 if (remove_vcc)
1565 lec_arp_clear_vccs(to_remove);
1566 }
1567 skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */
1568
1569 DPRINTK("LEC_ARP: Removed entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1570 0xff & to_remove->mac_addr[0], 0xff & to_remove->mac_addr[1],
1571 0xff & to_remove->mac_addr[2], 0xff & to_remove->mac_addr[3],
1572 0xff & to_remove->mac_addr[4], 0xff & to_remove->mac_addr[5]);
1573 return 0;
1574 }
1575
1576 #if DEBUG_ARP_TABLE
1577 static char *get_status_string(unsigned char st)
1578 {
1579 switch (st) {
1580 case ESI_UNKNOWN:
1581 return "ESI_UNKNOWN";
1582 case ESI_ARP_PENDING:
1583 return "ESI_ARP_PENDING";
1584 case ESI_VC_PENDING:
1585 return "ESI_VC_PENDING";
1586 case ESI_FLUSH_PENDING:
1587 return "ESI_FLUSH_PENDING";
1588 case ESI_FORWARD_DIRECT:
1589 return "ESI_FORWARD_DIRECT";
1590 default:
1591 return "<UNKNOWN>";
1592 }
1593 }
1594 #endif
1595
1596 static void dump_arp_table(struct lec_priv *priv)
1597 {
1598 #if DEBUG_ARP_TABLE
1599 int i, j, offset;
1600 struct lec_arp_table *rulla;
1601 char buf[1024];
1602 struct lec_arp_table **lec_arp_tables =
1603 (struct lec_arp_table **)priv->lec_arp_tables;
1604 struct lec_arp_table *lec_arp_empty_ones =
1605 (struct lec_arp_table *)priv->lec_arp_empty_ones;
1606 struct lec_arp_table *lec_no_forward =
1607 (struct lec_arp_table *)priv->lec_no_forward;
1608 struct lec_arp_table *mcast_fwds = priv->mcast_fwds;
1609
1610 printk("Dump %p:\n", priv);
1611 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1612 rulla = lec_arp_tables[i];
1613 offset = 0;
1614 offset += sprintf(buf, "%d: %p\n", i, rulla);
1615 while (rulla) {
1616 offset += sprintf(buf + offset, "Mac:");
1617 for (j = 0; j < ETH_ALEN; j++) {
1618 offset += sprintf(buf + offset,
1619 "%2.2x ",
1620 rulla->mac_addr[j] & 0xff);
1621 }
1622 offset += sprintf(buf + offset, "Atm:");
1623 for (j = 0; j < ATM_ESA_LEN; j++) {
1624 offset += sprintf(buf + offset,
1625 "%2.2x ",
1626 rulla->atm_addr[j] & 0xff);
1627 }
1628 offset += sprintf(buf + offset,
1629 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1630 rulla->vcc ? rulla->vcc->vpi : 0,
1631 rulla->vcc ? rulla->vcc->vci : 0,
1632 rulla->recv_vcc ? rulla->recv_vcc->
1633 vpi : 0,
1634 rulla->recv_vcc ? rulla->recv_vcc->
1635 vci : 0, rulla->last_used,
1636 rulla->timestamp, rulla->no_tries);
1637 offset +=
1638 sprintf(buf + offset,
1639 "Flags:%x, Packets_flooded:%x, Status: %s ",
1640 rulla->flags, rulla->packets_flooded,
1641 get_status_string(rulla->status));
1642 offset += sprintf(buf + offset, "->%p\n", rulla->next);
1643 rulla = rulla->next;
1644 }
1645 printk("%s", buf);
1646 }
1647 rulla = lec_no_forward;
1648 if (rulla)
1649 printk("No forward\n");
1650 while (rulla) {
1651 offset = 0;
1652 offset += sprintf(buf + offset, "Mac:");
1653 for (j = 0; j < ETH_ALEN; j++) {
1654 offset += sprintf(buf + offset, "%2.2x ",
1655 rulla->mac_addr[j] & 0xff);
1656 }
1657 offset += sprintf(buf + offset, "Atm:");
1658 for (j = 0; j < ATM_ESA_LEN; j++) {
1659 offset += sprintf(buf + offset, "%2.2x ",
1660 rulla->atm_addr[j] & 0xff);
1661 }
1662 offset += sprintf(buf + offset,
1663 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1664 rulla->vcc ? rulla->vcc->vpi : 0,
1665 rulla->vcc ? rulla->vcc->vci : 0,
1666 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1667 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1668 rulla->last_used,
1669 rulla->timestamp, rulla->no_tries);
1670 offset += sprintf(buf + offset,
1671 "Flags:%x, Packets_flooded:%x, Status: %s ",
1672 rulla->flags, rulla->packets_flooded,
1673 get_status_string(rulla->status));
1674 offset += sprintf(buf + offset, "->%lx\n", (long)rulla->next);
1675 rulla = rulla->next;
1676 printk("%s", buf);
1677 }
1678 rulla = lec_arp_empty_ones;
1679 if (rulla)
1680 printk("Empty ones\n");
1681 while (rulla) {
1682 offset = 0;
1683 offset += sprintf(buf + offset, "Mac:");
1684 for (j = 0; j < ETH_ALEN; j++) {
1685 offset += sprintf(buf + offset, "%2.2x ",
1686 rulla->mac_addr[j] & 0xff);
1687 }
1688 offset += sprintf(buf + offset, "Atm:");
1689 for (j = 0; j < ATM_ESA_LEN; j++) {
1690 offset += sprintf(buf + offset, "%2.2x ",
1691 rulla->atm_addr[j] & 0xff);
1692 }
1693 offset += sprintf(buf + offset,
1694 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1695 rulla->vcc ? rulla->vcc->vpi : 0,
1696 rulla->vcc ? rulla->vcc->vci : 0,
1697 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1698 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1699 rulla->last_used,
1700 rulla->timestamp, rulla->no_tries);
1701 offset += sprintf(buf + offset,
1702 "Flags:%x, Packets_flooded:%x, Status: %s ",
1703 rulla->flags, rulla->packets_flooded,
1704 get_status_string(rulla->status));
1705 offset += sprintf(buf + offset, "->%lx\n", (long)rulla->next);
1706 rulla = rulla->next;
1707 printk("%s", buf);
1708 }
1709
1710 rulla = mcast_fwds;
1711 if (rulla)
1712 printk("Multicast Forward VCCs\n");
1713 while (rulla) {
1714 offset = 0;
1715 offset += sprintf(buf + offset, "Mac:");
1716 for (j = 0; j < ETH_ALEN; j++) {
1717 offset += sprintf(buf + offset, "%2.2x ",
1718 rulla->mac_addr[j] & 0xff);
1719 }
1720 offset += sprintf(buf + offset, "Atm:");
1721 for (j = 0; j < ATM_ESA_LEN; j++) {
1722 offset += sprintf(buf + offset, "%2.2x ",
1723 rulla->atm_addr[j] & 0xff);
1724 }
1725 offset += sprintf(buf + offset,
1726 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1727 rulla->vcc ? rulla->vcc->vpi : 0,
1728 rulla->vcc ? rulla->vcc->vci : 0,
1729 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1730 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1731 rulla->last_used,
1732 rulla->timestamp, rulla->no_tries);
1733 offset += sprintf(buf + offset,
1734 "Flags:%x, Packets_flooded:%x, Status: %s ",
1735 rulla->flags, rulla->packets_flooded,
1736 get_status_string(rulla->status));
1737 offset += sprintf(buf + offset, "->%lx\n", (long)rulla->next);
1738 rulla = rulla->next;
1739 printk("%s", buf);
1740 }
1741
1742 #endif
1743 }
1744
1745 /*
1746 * Destruction of arp-cache
1747 */
1748 static void lec_arp_destroy(struct lec_priv *priv)
1749 {
1750 unsigned long flags;
1751 struct lec_arp_table *entry, *next;
1752 int i;
1753
1754 del_timer_sync(&priv->lec_arp_timer);
1755
1756 /*
1757 * Remove all entries
1758 */
1759
1760 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1761 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1762 for (entry = priv->lec_arp_tables[i]; entry != NULL;
1763 entry = next) {
1764 next = entry->next;
1765 lec_arp_remove(priv, entry);
1766 kfree(entry);
1767 }
1768 }
1769 entry = priv->lec_arp_empty_ones;
1770 while (entry) {
1771 next = entry->next;
1772 del_timer_sync(&entry->timer);
1773 lec_arp_clear_vccs(entry);
1774 kfree(entry);
1775 entry = next;
1776 }
1777 priv->lec_arp_empty_ones = NULL;
1778 entry = priv->lec_no_forward;
1779 while (entry) {
1780 next = entry->next;
1781 del_timer_sync(&entry->timer);
1782 lec_arp_clear_vccs(entry);
1783 kfree(entry);
1784 entry = next;
1785 }
1786 priv->lec_no_forward = NULL;
1787 entry = priv->mcast_fwds;
1788 while (entry) {
1789 next = entry->next;
1790 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
1791 lec_arp_clear_vccs(entry);
1792 kfree(entry);
1793 entry = next;
1794 }
1795 priv->mcast_fwds = NULL;
1796 priv->mcast_vcc = NULL;
1797 memset(priv->lec_arp_tables, 0,
1798 sizeof(struct lec_arp_table *) * LEC_ARP_TABLE_SIZE);
1799 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1800 }
1801
1802 /*
1803 * Find entry by mac_address
1804 */
1805 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
1806 unsigned char *mac_addr)
1807 {
1808 unsigned short place;
1809 struct lec_arp_table *to_return;
1810
1811 DPRINTK("LEC_ARP: lec_arp_find :%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1812 mac_addr[0] & 0xff, mac_addr[1] & 0xff, mac_addr[2] & 0xff,
1813 mac_addr[3] & 0xff, mac_addr[4] & 0xff, mac_addr[5] & 0xff);
1814 place = HASH(mac_addr[ETH_ALEN - 1]);
1815
1816 to_return = priv->lec_arp_tables[place];
1817 while (to_return) {
1818 if (!compare_ether_addr(mac_addr, to_return->mac_addr)) {
1819 return to_return;
1820 }
1821 to_return = to_return->next;
1822 }
1823 return NULL;
1824 }
1825
1826 static struct lec_arp_table *make_entry(struct lec_priv *priv,
1827 unsigned char *mac_addr)
1828 {
1829 struct lec_arp_table *to_return;
1830
1831 to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC);
1832 if (!to_return) {
1833 printk("LEC: Arp entry kmalloc failed\n");
1834 return NULL;
1835 }
1836 memcpy(to_return->mac_addr, mac_addr, ETH_ALEN);
1837 init_timer(&to_return->timer);
1838 to_return->timer.function = lec_arp_expire_arp;
1839 to_return->timer.data = (unsigned long)to_return;
1840 to_return->last_used = jiffies;
1841 to_return->priv = priv;
1842 skb_queue_head_init(&to_return->tx_wait);
1843 return to_return;
1844 }
1845
1846 /* Arp sent timer expired */
1847 static void lec_arp_expire_arp(unsigned long data)
1848 {
1849 struct lec_arp_table *entry;
1850
1851 entry = (struct lec_arp_table *)data;
1852
1853 DPRINTK("lec_arp_expire_arp\n");
1854 if (entry->status == ESI_ARP_PENDING) {
1855 if (entry->no_tries <= entry->priv->max_retry_count) {
1856 if (entry->is_rdesc)
1857 send_to_lecd(entry->priv, l_rdesc_arp_xmt,
1858 entry->mac_addr, NULL, NULL);
1859 else
1860 send_to_lecd(entry->priv, l_arp_xmt,
1861 entry->mac_addr, NULL, NULL);
1862 entry->no_tries++;
1863 }
1864 mod_timer(&entry->timer, jiffies + (1 * HZ));
1865 }
1866 }
1867
1868 /* Unknown/unused vcc expire, remove associated entry */
1869 static void lec_arp_expire_vcc(unsigned long data)
1870 {
1871 unsigned long flags;
1872 struct lec_arp_table *to_remove = (struct lec_arp_table *)data;
1873 struct lec_priv *priv = (struct lec_priv *)to_remove->priv;
1874 struct lec_arp_table *entry = NULL;
1875
1876 del_timer(&to_remove->timer);
1877
1878 DPRINTK("LEC_ARP %p %p: lec_arp_expire_vcc vpi:%d vci:%d\n",
1879 to_remove, priv,
1880 to_remove->vcc ? to_remove->recv_vcc->vpi : 0,
1881 to_remove->vcc ? to_remove->recv_vcc->vci : 0);
1882 DPRINTK("eo:%p nf:%p\n", priv->lec_arp_empty_ones,
1883 priv->lec_no_forward);
1884
1885 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1886 if (to_remove == priv->lec_arp_empty_ones)
1887 priv->lec_arp_empty_ones = to_remove->next;
1888 else {
1889 entry = priv->lec_arp_empty_ones;
1890 while (entry && entry->next != to_remove)
1891 entry = entry->next;
1892 if (entry)
1893 entry->next = to_remove->next;
1894 }
1895 if (!entry) {
1896 if (to_remove == priv->lec_no_forward) {
1897 priv->lec_no_forward = to_remove->next;
1898 } else {
1899 entry = priv->lec_no_forward;
1900 while (entry && entry->next != to_remove)
1901 entry = entry->next;
1902 if (entry)
1903 entry->next = to_remove->next;
1904 }
1905 }
1906 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1907
1908 lec_arp_clear_vccs(to_remove);
1909 kfree(to_remove);
1910 }
1911
1912 /*
1913 * Expire entries.
1914 * 1. Re-set timer
1915 * 2. For each entry, delete entries that have aged past the age limit.
1916 * 3. For each entry, depending on the status of the entry, perform
1917 * the following maintenance.
1918 * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the
1919 * tick_count is above the max_unknown_frame_time, clear
1920 * the tick_count to zero and clear the packets_flooded counter
1921 * to zero. This supports the packet rate limit per address
1922 * while flooding unknowns.
1923 * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater
1924 * than or equal to the path_switching_delay, change the status
1925 * to ESI_FORWARD_DIRECT. This causes the flush period to end
1926 * regardless of the progress of the flush protocol.
1927 */
1928 static void lec_arp_check_expire(unsigned long data)
1929 {
1930 unsigned long flags;
1931 struct lec_priv *priv = (struct lec_priv *)data;
1932 struct lec_arp_table *entry, *next;
1933 unsigned long now;
1934 unsigned long time_to_check;
1935 int i;
1936
1937 DPRINTK("lec_arp_check_expire %p\n", priv);
1938 DPRINTK("expire: eo:%p nf:%p\n", priv->lec_arp_empty_ones,
1939 priv->lec_no_forward);
1940 now = jiffies;
1941 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1942 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1943 for (entry = priv->lec_arp_tables[i]; entry != NULL;) {
1944 if ((entry->flags) & LEC_REMOTE_FLAG &&
1945 priv->topology_change)
1946 time_to_check = priv->forward_delay_time;
1947 else
1948 time_to_check = priv->aging_time;
1949
1950 DPRINTK("About to expire: %lx - %lx > %lx\n",
1951 now, entry->last_used, time_to_check);
1952 if (time_after(now, entry->last_used + time_to_check)
1953 && !(entry->flags & LEC_PERMANENT_FLAG)
1954 && !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */
1955 /* Remove entry */
1956 DPRINTK("LEC:Entry timed out\n");
1957 next = entry->next;
1958 lec_arp_remove(priv, entry);
1959 kfree(entry);
1960 entry = next;
1961 } else {
1962 /* Something else */
1963 if ((entry->status == ESI_VC_PENDING ||
1964 entry->status == ESI_ARP_PENDING)
1965 && time_after_eq(now,
1966 entry->timestamp +
1967 priv->
1968 max_unknown_frame_time)) {
1969 entry->timestamp = jiffies;
1970 entry->packets_flooded = 0;
1971 if (entry->status == ESI_VC_PENDING)
1972 send_to_lecd(priv, l_svc_setup,
1973 entry->mac_addr,
1974 entry->atm_addr,
1975 NULL);
1976 }
1977 if (entry->status == ESI_FLUSH_PENDING
1978 &&
1979 time_after_eq(now, entry->timestamp +
1980 priv->path_switching_delay)) {
1981 struct sk_buff *skb;
1982
1983 while ((skb =
1984 skb_dequeue(&entry->tx_wait)) !=
1985 NULL)
1986 lec_send(entry->vcc, skb,
1987 entry->priv);
1988 entry->last_used = jiffies;
1989 entry->status = ESI_FORWARD_DIRECT;
1990 }
1991 entry = entry->next;
1992 }
1993 }
1994 }
1995 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1996
1997 mod_timer(&priv->lec_arp_timer, jiffies + LEC_ARP_REFRESH_INTERVAL);
1998 }
1999
2000 /*
2001 * Try to find vcc where mac_address is attached.
2002 *
2003 */
2004 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
2005 unsigned char *mac_to_find, int is_rdesc,
2006 struct lec_arp_table **ret_entry)
2007 {
2008 unsigned long flags;
2009 struct lec_arp_table *entry;
2010 struct atm_vcc *found;
2011
2012 if (mac_to_find[0] & 0x01) {
2013 switch (priv->lane_version) {
2014 case 1:
2015 return priv->mcast_vcc;
2016 break;
2017 case 2: /* LANE2 wants arp for multicast addresses */
2018 if (!compare_ether_addr(mac_to_find, bus_mac))
2019 return priv->mcast_vcc;
2020 break;
2021 default:
2022 break;
2023 }
2024 }
2025
2026 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2027 entry = lec_arp_find(priv, mac_to_find);
2028
2029 if (entry) {
2030 if (entry->status == ESI_FORWARD_DIRECT) {
2031 /* Connection Ok */
2032 entry->last_used = jiffies;
2033 *ret_entry = entry;
2034 found = entry->vcc;
2035 goto out;
2036 }
2037 /*
2038 * If the LE_ARP cache entry is still pending, reset count to 0
2039 * so another LE_ARP request can be made for this frame.
2040 */
2041 if (entry->status == ESI_ARP_PENDING) {
2042 entry->no_tries = 0;
2043 }
2044 /*
2045 * Data direct VC not yet set up, check to see if the unknown
2046 * frame count is greater than the limit. If the limit has
2047 * not been reached, allow the caller to send packet to
2048 * BUS.
2049 */
2050 if (entry->status != ESI_FLUSH_PENDING &&
2051 entry->packets_flooded <
2052 priv->maximum_unknown_frame_count) {
2053 entry->packets_flooded++;
2054 DPRINTK("LEC_ARP: Flooding..\n");
2055 found = priv->mcast_vcc;
2056 goto out;
2057 }
2058 /*
2059 * We got here because entry->status == ESI_FLUSH_PENDING
2060 * or BUS flood limit was reached for an entry which is
2061 * in ESI_ARP_PENDING or ESI_VC_PENDING state.
2062 */
2063 *ret_entry = entry;
2064 DPRINTK("lec: entry->status %d entry->vcc %p\n", entry->status,
2065 entry->vcc);
2066 found = NULL;
2067 } else {
2068 /* No matching entry was found */
2069 entry = make_entry(priv, mac_to_find);
2070 DPRINTK("LEC_ARP: Making entry\n");
2071 if (!entry) {
2072 found = priv->mcast_vcc;
2073 goto out;
2074 }
2075 lec_arp_add(priv, entry);
2076 /* We want arp-request(s) to be sent */
2077 entry->packets_flooded = 1;
2078 entry->status = ESI_ARP_PENDING;
2079 entry->no_tries = 1;
2080 entry->last_used = entry->timestamp = jiffies;
2081 entry->is_rdesc = is_rdesc;
2082 if (entry->is_rdesc)
2083 send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL,
2084 NULL);
2085 else
2086 send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL);
2087 entry->timer.expires = jiffies + (1 * HZ);
2088 entry->timer.function = lec_arp_expire_arp;
2089 add_timer(&entry->timer);
2090 found = priv->mcast_vcc;
2091 }
2092
2093 out:
2094 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2095 return found;
2096 }
2097
2098 static int
2099 lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr,
2100 unsigned long permanent)
2101 {
2102 unsigned long flags;
2103 struct lec_arp_table *entry, *next;
2104 int i;
2105
2106 DPRINTK("lec_addr_delete\n");
2107 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2108 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2109 for (entry = priv->lec_arp_tables[i]; entry != NULL;
2110 entry = next) {
2111 next = entry->next;
2112 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)
2113 && (permanent ||
2114 !(entry->flags & LEC_PERMANENT_FLAG))) {
2115 lec_arp_remove(priv, entry);
2116 kfree(entry);
2117 }
2118 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2119 return 0;
2120 }
2121 }
2122 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2123 return -1;
2124 }
2125
2126 /*
2127 * Notifies: Response to arp_request (atm_addr != NULL)
2128 */
2129 static void
2130 lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr,
2131 unsigned char *atm_addr, unsigned long remoteflag,
2132 unsigned int targetless_le_arp)
2133 {
2134 unsigned long flags;
2135 struct lec_arp_table *entry, *tmp;
2136 int i;
2137
2138 DPRINTK("lec:%s", (targetless_le_arp) ? "targetless " : " ");
2139 DPRINTK("lec_arp_update mac:%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
2140 mac_addr[0], mac_addr[1], mac_addr[2], mac_addr[3],
2141 mac_addr[4], mac_addr[5]);
2142
2143 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2144 entry = lec_arp_find(priv, mac_addr);
2145 if (entry == NULL && targetless_le_arp)
2146 goto out; /*
2147 * LANE2: ignore targetless LE_ARPs for which
2148 * we have no entry in the cache. 7.1.30
2149 */
2150 if (priv->lec_arp_empty_ones) {
2151 entry = priv->lec_arp_empty_ones;
2152 if (!memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN)) {
2153 priv->lec_arp_empty_ones = entry->next;
2154 } else {
2155 while (entry->next && memcmp(entry->next->atm_addr,
2156 atm_addr, ATM_ESA_LEN))
2157 entry = entry->next;
2158 if (entry->next) {
2159 tmp = entry;
2160 entry = entry->next;
2161 tmp->next = entry->next;
2162 } else
2163 entry = NULL;
2164
2165 }
2166 if (entry) {
2167 del_timer(&entry->timer);
2168 tmp = lec_arp_find(priv, mac_addr);
2169 if (tmp) {
2170 del_timer(&tmp->timer);
2171 tmp->status = ESI_FORWARD_DIRECT;
2172 memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN);
2173 tmp->vcc = entry->vcc;
2174 tmp->old_push = entry->old_push;
2175 tmp->last_used = jiffies;
2176 del_timer(&entry->timer);
2177 kfree(entry);
2178 entry = tmp;
2179 } else {
2180 entry->status = ESI_FORWARD_DIRECT;
2181 memcpy(entry->mac_addr, mac_addr, ETH_ALEN);
2182 entry->last_used = jiffies;
2183 lec_arp_add(priv, entry);
2184 }
2185 if (remoteflag)
2186 entry->flags |= LEC_REMOTE_FLAG;
2187 else
2188 entry->flags &= ~LEC_REMOTE_FLAG;
2189 DPRINTK("After update\n");
2190 dump_arp_table(priv);
2191 goto out;
2192 }
2193 }
2194 entry = lec_arp_find(priv, mac_addr);
2195 if (!entry) {
2196 entry = make_entry(priv, mac_addr);
2197 if (!entry)
2198 goto out;
2199 entry->status = ESI_UNKNOWN;
2200 lec_arp_add(priv, entry);
2201 /* Temporary, changes before end of function */
2202 }
2203 memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN);
2204 del_timer(&entry->timer);
2205 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2206 for (tmp = priv->lec_arp_tables[i]; tmp; tmp = tmp->next) {
2207 if (entry != tmp &&
2208 !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) {
2209 /* Vcc to this host exists */
2210 if (tmp->status > ESI_VC_PENDING) {
2211 /*
2212 * ESI_FLUSH_PENDING,
2213 * ESI_FORWARD_DIRECT
2214 */
2215 entry->vcc = tmp->vcc;
2216 entry->old_push = tmp->old_push;
2217 }
2218 entry->status = tmp->status;
2219 break;
2220 }
2221 }
2222 }
2223 if (remoteflag)
2224 entry->flags |= LEC_REMOTE_FLAG;
2225 else
2226 entry->flags &= ~LEC_REMOTE_FLAG;
2227 if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) {
2228 entry->status = ESI_VC_PENDING;
2229 send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr,
2230 NULL);
2231 }
2232 DPRINTK("After update2\n");
2233 dump_arp_table(priv);
2234 out:
2235 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2236 }
2237
2238 /*
2239 * Notifies: Vcc setup ready
2240 */
2241 static void
2242 lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data,
2243 struct atm_vcc *vcc,
2244 void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb))
2245 {
2246 unsigned long flags;
2247 struct lec_arp_table *entry;
2248 int i, found_entry = 0;
2249
2250 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2251 if (ioc_data->receive == 2) {
2252 /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */
2253
2254 DPRINTK("LEC_ARP: Attaching mcast forward\n");
2255 #if 0
2256 entry = lec_arp_find(priv, bus_mac);
2257 if (!entry) {
2258 printk("LEC_ARP: Multicast entry not found!\n");
2259 goto out;
2260 }
2261 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2262 entry->recv_vcc = vcc;
2263 entry->old_recv_push = old_push;
2264 #endif
2265 entry = make_entry(priv, bus_mac);
2266 if (entry == NULL)
2267 goto out;
2268 del_timer(&entry->timer);
2269 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2270 entry->recv_vcc = vcc;
2271 entry->old_recv_push = old_push;
2272 entry->next = priv->mcast_fwds;
2273 priv->mcast_fwds = entry;
2274 goto out;
2275 } else if (ioc_data->receive == 1) {
2276 /*
2277 * Vcc which we don't want to make default vcc,
2278 * attach it anyway.
2279 */
2280 DPRINTK
2281 ("LEC_ARP:Attaching data direct, not default: "
2282 "%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",
2283 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2284 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2285 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2286 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2287 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2288 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2289 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2290 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2291 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2292 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2293 entry = make_entry(priv, bus_mac);
2294 if (entry == NULL)
2295 goto out;
2296 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2297 memset(entry->mac_addr, 0, ETH_ALEN);
2298 entry->recv_vcc = vcc;
2299 entry->old_recv_push = old_push;
2300 entry->status = ESI_UNKNOWN;
2301 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2302 entry->timer.function = lec_arp_expire_vcc;
2303 add_timer(&entry->timer);
2304 entry->next = priv->lec_no_forward;
2305 priv->lec_no_forward = entry;
2306 dump_arp_table(priv);
2307 goto out;
2308 }
2309 DPRINTK
2310 ("LEC_ARP:Attaching data direct, default: "
2311 "%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",
2312 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2313 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2314 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2315 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2316 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2317 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2318 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2319 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2320 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2321 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2322 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2323 for (entry = priv->lec_arp_tables[i]; entry;
2324 entry = entry->next) {
2325 if (memcmp
2326 (ioc_data->atm_addr, entry->atm_addr,
2327 ATM_ESA_LEN) == 0) {
2328 DPRINTK("LEC_ARP: Attaching data direct\n");
2329 DPRINTK("Currently -> Vcc: %d, Rvcc:%d\n",
2330 entry->vcc ? entry->vcc->vci : 0,
2331 entry->recv_vcc ? entry->recv_vcc->
2332 vci : 0);
2333 found_entry = 1;
2334 del_timer(&entry->timer);
2335 entry->vcc = vcc;
2336 entry->old_push = old_push;
2337 if (entry->status == ESI_VC_PENDING) {
2338 if (priv->maximum_unknown_frame_count
2339 == 0)
2340 entry->status =
2341 ESI_FORWARD_DIRECT;
2342 else {
2343 entry->timestamp = jiffies;
2344 entry->status =
2345 ESI_FLUSH_PENDING;
2346 #if 0
2347 send_to_lecd(priv, l_flush_xmt,
2348 NULL,
2349 entry->atm_addr,
2350 NULL);
2351 #endif
2352 }
2353 } else {
2354 /*
2355 * They were forming a connection
2356 * to us, and we to them. Our
2357 * ATM address is numerically lower
2358 * than theirs, so we make connection
2359 * we formed into default VCC (8.1.11).
2360 * Connection they made gets torn
2361 * down. This might confuse some
2362 * clients. Can be changed if
2363 * someone reports trouble...
2364 */
2365 ;
2366 }
2367 }
2368 }
2369 }
2370 if (found_entry) {
2371 DPRINTK("After vcc was added\n");
2372 dump_arp_table(priv);
2373 goto out;
2374 }
2375 /*
2376 * Not found, snatch address from first data packet that arrives
2377 * from this vcc
2378 */
2379 entry = make_entry(priv, bus_mac);
2380 if (!entry)
2381 goto out;
2382 entry->vcc = vcc;
2383 entry->old_push = old_push;
2384 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2385 memset(entry->mac_addr, 0, ETH_ALEN);
2386 entry->status = ESI_UNKNOWN;
2387 entry->next = priv->lec_arp_empty_ones;
2388 priv->lec_arp_empty_ones = entry;
2389 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2390 entry->timer.function = lec_arp_expire_vcc;
2391 add_timer(&entry->timer);
2392 DPRINTK("After vcc was added\n");
2393 dump_arp_table(priv);
2394 out:
2395 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2396 }
2397
2398 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id)
2399 {
2400 unsigned long flags;
2401 struct lec_arp_table *entry;
2402 int i;
2403
2404 DPRINTK("LEC:lec_flush_complete %lx\n", tran_id);
2405 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2406 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2407 for (entry = priv->lec_arp_tables[i]; entry;
2408 entry = entry->next) {
2409 if (entry->flush_tran_id == tran_id
2410 && entry->status == ESI_FLUSH_PENDING) {
2411 struct sk_buff *skb;
2412
2413 while ((skb =
2414 skb_dequeue(&entry->tx_wait)) != NULL)
2415 lec_send(entry->vcc, skb, entry->priv);
2416 entry->status = ESI_FORWARD_DIRECT;
2417 DPRINTK("LEC_ARP: Flushed\n");
2418 }
2419 }
2420 }
2421 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2422 dump_arp_table(priv);
2423 }
2424
2425 static void
2426 lec_set_flush_tran_id(struct lec_priv *priv,
2427 unsigned char *atm_addr, unsigned long tran_id)
2428 {
2429 unsigned long flags;
2430 struct lec_arp_table *entry;
2431 int i;
2432
2433 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2434 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
2435 for (entry = priv->lec_arp_tables[i]; entry;
2436 entry = entry->next)
2437 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) {
2438 entry->flush_tran_id = tran_id;
2439 DPRINTK
2440 ("Set flush transaction id to %lx for %p\n",
2441 tran_id, entry);
2442 }
2443 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2444 }
2445
2446 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc)
2447 {
2448 unsigned long flags;
2449 unsigned char mac_addr[] = {
2450 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
2451 };
2452 struct lec_arp_table *to_add;
2453 struct lec_vcc_priv *vpriv;
2454 int err = 0;
2455
2456 if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL)))
2457 return -ENOMEM;
2458 vpriv->xoff = 0;
2459 vpriv->old_pop = vcc->pop;
2460 vcc->user_back = vpriv;
2461 vcc->pop = lec_pop;
2462 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2463 to_add = make_entry(priv, mac_addr);
2464 if (!to_add) {
2465 vcc->pop = vpriv->old_pop;
2466 kfree(vpriv);
2467 err = -ENOMEM;
2468 goto out;
2469 }
2470 memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN);
2471 to_add->status = ESI_FORWARD_DIRECT;
2472 to_add->flags |= LEC_PERMANENT_FLAG;
2473 to_add->vcc = vcc;
2474 to_add->old_push = vcc->push;
2475 vcc->push = lec_push;
2476 priv->mcast_vcc = vcc;
2477 lec_arp_add(priv, to_add);
2478 out:
2479 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2480 return err;
2481 }
2482
2483 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc)
2484 {
2485 unsigned long flags;
2486 struct lec_arp_table *entry, *next;
2487 int i;
2488
2489 DPRINTK("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci);
2490 dump_arp_table(priv);
2491 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2492 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2493 for (entry = priv->lec_arp_tables[i]; entry; entry = next) {
2494 next = entry->next;
2495 if (vcc == entry->vcc) {
2496 lec_arp_remove(priv, entry);
2497 kfree(entry);
2498 if (priv->mcast_vcc == vcc) {
2499 priv->mcast_vcc = NULL;
2500 }
2501 }
2502 }
2503 }
2504
2505 entry = priv->lec_arp_empty_ones;
2506 priv->lec_arp_empty_ones = NULL;
2507 while (entry != NULL) {
2508 next = entry->next;
2509 if (entry->vcc == vcc) { /* leave it out from the list */
2510 lec_arp_clear_vccs(entry);
2511 del_timer(&entry->timer);
2512 kfree(entry);
2513 } else { /* put it back to the list */
2514 entry->next = priv->lec_arp_empty_ones;
2515 priv->lec_arp_empty_ones = entry;
2516 }
2517 entry = next;
2518 }
2519
2520 entry = priv->lec_no_forward;
2521 priv->lec_no_forward = NULL;
2522 while (entry != NULL) {
2523 next = entry->next;
2524 if (entry->recv_vcc == vcc) {
2525 lec_arp_clear_vccs(entry);
2526 del_timer(&entry->timer);
2527 kfree(entry);
2528 } else {
2529 entry->next = priv->lec_no_forward;
2530 priv->lec_no_forward = entry;
2531 }
2532 entry = next;
2533 }
2534
2535 entry = priv->mcast_fwds;
2536 priv->mcast_fwds = NULL;
2537 while (entry != NULL) {
2538 next = entry->next;
2539 if (entry->recv_vcc == vcc) {
2540 lec_arp_clear_vccs(entry);
2541 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
2542 kfree(entry);
2543 } else {
2544 entry->next = priv->mcast_fwds;
2545 priv->mcast_fwds = entry;
2546 }
2547 entry = next;
2548 }
2549
2550 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2551 dump_arp_table(priv);
2552 }
2553
2554 static void
2555 lec_arp_check_empties(struct lec_priv *priv,
2556 struct atm_vcc *vcc, struct sk_buff *skb)
2557 {
2558 unsigned long flags;
2559 struct lec_arp_table *entry, *prev;
2560 struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data;
2561 unsigned char *src;
2562 #ifdef CONFIG_TR
2563 struct lecdatahdr_8025 *tr_hdr = (struct lecdatahdr_8025 *)skb->data;
2564
2565 if (priv->is_trdev)
2566 src = tr_hdr->h_source;
2567 else
2568 #endif
2569 src = hdr->h_source;
2570
2571 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2572 entry = priv->lec_arp_empty_ones;
2573 if (vcc == entry->vcc) {
2574 del_timer(&entry->timer);
2575 memcpy(entry->mac_addr, src, ETH_ALEN);
2576 entry->status = ESI_FORWARD_DIRECT;
2577 entry->last_used = jiffies;
2578 priv->lec_arp_empty_ones = entry->next;
2579 /* We might have got an entry */
2580 if ((prev = lec_arp_find(priv, src))) {
2581 lec_arp_remove(priv, prev);
2582 kfree(prev);
2583 }
2584 lec_arp_add(priv, entry);
2585 goto out;
2586 }
2587 prev = entry;
2588 entry = entry->next;
2589 while (entry && entry->vcc != vcc) {
2590 prev = entry;
2591 entry = entry->next;
2592 }
2593 if (!entry) {
2594 DPRINTK("LEC_ARP: Arp_check_empties: entry not found!\n");
2595 goto out;
2596 }
2597 del_timer(&entry->timer);
2598 memcpy(entry->mac_addr, src, ETH_ALEN);
2599 entry->status = ESI_FORWARD_DIRECT;
2600 entry->last_used = jiffies;
2601 prev->next = entry->next;
2602 if ((prev = lec_arp_find(priv, src))) {
2603 lec_arp_remove(priv, prev);
2604 kfree(prev);
2605 }
2606 lec_arp_add(priv, entry);
2607 out:
2608 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2609 }
2610
2611 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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