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WorkStruct: Typedef the work function prototype
[linux-2.6/verdex.git] / net / atm / lec.c
blob66c57c1091a8e3ff2020bd75135f7ac65e971544
1 /*
2 * lec.c: Lan Emulation driver
3 *
4 * Marko Kiiskila <mkiiskila@yahoo.com>
5 */
6
7 #include <linux/kernel.h>
8 #include <linux/bitops.h>
9 #include <linux/capability.h>
10
11 /* We are ethernet device */
12 #include <linux/if_ether.h>
13 #include <linux/netdevice.h>
14 #include <linux/etherdevice.h>
15 #include <net/sock.h>
16 #include <linux/skbuff.h>
17 #include <linux/ip.h>
18 #include <asm/byteorder.h>
19 #include <asm/uaccess.h>
20 #include <net/arp.h>
21 #include <net/dst.h>
22 #include <linux/proc_fs.h>
23 #include <linux/spinlock.h>
24 #include <linux/proc_fs.h>
25 #include <linux/seq_file.h>
26
27 /* TokenRing if needed */
28 #ifdef CONFIG_TR
29 #include <linux/trdevice.h>
30 #endif
31
32 /* And atm device */
33 #include <linux/atmdev.h>
34 #include <linux/atmlec.h>
35
36 /* Proxy LEC knows about bridging */
37 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
38 #include <linux/if_bridge.h>
39 #include "../bridge/br_private.h"
40
41 static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 };
42 #endif
43
44 /* Modular too */
45 #include <linux/module.h>
46 #include <linux/init.h>
47
48 #include "lec.h"
49 #include "lec_arpc.h"
50 #include "resources.h"
51
52 #if 0
53 #define DPRINTK printk
54 #else
55 #define DPRINTK(format,args...)
56 #endif
57
58 #define DUMP_PACKETS 0 /*
59 * 0 = None,
60 * 1 = 30 first bytes
61 * 2 = Whole packet
62 */
63
64 #define LEC_UNRES_QUE_LEN 8 /*
65 * number of tx packets to queue for a
66 * single destination while waiting for SVC
67 */
68
69 static int lec_open(struct net_device *dev);
70 static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev);
71 static int lec_close(struct net_device *dev);
72 static struct net_device_stats *lec_get_stats(struct net_device *dev);
73 static void lec_init(struct net_device *dev);
74 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
75 unsigned char *mac_addr);
76 static int lec_arp_remove(struct lec_priv *priv,
77 struct lec_arp_table *to_remove);
78 /* LANE2 functions */
79 static void lane2_associate_ind(struct net_device *dev, u8 *mac_address,
80 u8 *tlvs, u32 sizeoftlvs);
81 static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force,
82 u8 **tlvs, u32 *sizeoftlvs);
83 static int lane2_associate_req(struct net_device *dev, u8 *lan_dst,
84 u8 *tlvs, u32 sizeoftlvs);
85
86 static int lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr,
87 unsigned long permanent);
88 static void lec_arp_check_empties(struct lec_priv *priv,
89 struct atm_vcc *vcc, struct sk_buff *skb);
90 static void lec_arp_destroy(struct lec_priv *priv);
91 static void lec_arp_init(struct lec_priv *priv);
92 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
93 unsigned char *mac_to_find,
94 int is_rdesc,
95 struct lec_arp_table **ret_entry);
96 static void lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr,
97 unsigned char *atm_addr, unsigned long remoteflag,
98 unsigned int targetless_le_arp);
99 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id);
100 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc);
101 static void lec_set_flush_tran_id(struct lec_priv *priv,
102 unsigned char *atm_addr,
103 unsigned long tran_id);
104 static void lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data,
105 struct atm_vcc *vcc,
106 void (*old_push) (struct atm_vcc *vcc,
107 struct sk_buff *skb));
108 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc);
109
110 /* must be done under lec_arp_lock */
111 static inline void lec_arp_hold(struct lec_arp_table *entry)
112 {
113 atomic_inc(&entry->usage);
114 }
115
116 static inline void lec_arp_put(struct lec_arp_table *entry)
117 {
118 if (atomic_dec_and_test(&entry->usage))
119 kfree(entry);
120 }
121
122
123 static struct lane2_ops lane2_ops = {
124 lane2_resolve, /* resolve, spec 3.1.3 */
125 lane2_associate_req, /* associate_req, spec 3.1.4 */
126 NULL /* associate indicator, spec 3.1.5 */
127 };
128
129 static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
130
131 /* Device structures */
132 static struct net_device *dev_lec[MAX_LEC_ITF];
133
134 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
135 static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev)
136 {
137 struct ethhdr *eth;
138 char *buff;
139 struct lec_priv *priv;
140
141 /*
142 * Check if this is a BPDU. If so, ask zeppelin to send
143 * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit
144 * as the Config BPDU has
145 */
146 eth = (struct ethhdr *)skb->data;
147 buff = skb->data + skb->dev->hard_header_len;
148 if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) {
149 struct sock *sk;
150 struct sk_buff *skb2;
151 struct atmlec_msg *mesg;
152
153 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
154 if (skb2 == NULL)
155 return;
156 skb2->len = sizeof(struct atmlec_msg);
157 mesg = (struct atmlec_msg *)skb2->data;
158 mesg->type = l_topology_change;
159 buff += 4;
160 mesg->content.normal.flag = *buff & 0x01; /* 0x01 is topology change */
161
162 priv = (struct lec_priv *)dev->priv;
163 atm_force_charge(priv->lecd, skb2->truesize);
164 sk = sk_atm(priv->lecd);
165 skb_queue_tail(&sk->sk_receive_queue, skb2);
166 sk->sk_data_ready(sk, skb2->len);
167 }
168
169 return;
170 }
171 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
172
173 /*
174 * Modelled after tr_type_trans
175 * All multicast and ARE or STE frames go to BUS.
176 * Non source routed frames go by destination address.
177 * Last hop source routed frames go by destination address.
178 * Not last hop source routed frames go by _next_ route descriptor.
179 * Returns pointer to destination MAC address or fills in rdesc
180 * and returns NULL.
181 */
182 #ifdef CONFIG_TR
183 static unsigned char *get_tr_dst(unsigned char *packet, unsigned char *rdesc)
184 {
185 struct trh_hdr *trh;
186 int riflen, num_rdsc;
187
188 trh = (struct trh_hdr *)packet;
189 if (trh->daddr[0] & (uint8_t) 0x80)
190 return bus_mac; /* multicast */
191
192 if (trh->saddr[0] & TR_RII) {
193 riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8;
194 if ((ntohs(trh->rcf) >> 13) != 0)
195 return bus_mac; /* ARE or STE */
196 } else
197 return trh->daddr; /* not source routed */
198
199 if (riflen < 6)
200 return trh->daddr; /* last hop, source routed */
201
202 /* riflen is 6 or more, packet has more than one route descriptor */
203 num_rdsc = (riflen / 2) - 1;
204 memset(rdesc, 0, ETH_ALEN);
205 /* offset 4 comes from LAN destination field in LE control frames */
206 if (trh->rcf & htons((uint16_t) TR_RCF_DIR_BIT))
207 memcpy(&rdesc[4], &trh->rseg[num_rdsc - 2], sizeof(uint16_t));
208 else {
209 memcpy(&rdesc[4], &trh->rseg[1], sizeof(uint16_t));
210 rdesc[5] = ((ntohs(trh->rseg[0]) & 0x000f) | (rdesc[5] & 0xf0));
211 }
212
213 return NULL;
214 }
215 #endif /* CONFIG_TR */
216
217 /*
218 * Open/initialize the netdevice. This is called (in the current kernel)
219 * sometime after booting when the 'ifconfig' program is run.
220 *
221 * This routine should set everything up anew at each open, even
222 * registers that "should" only need to be set once at boot, so that
223 * there is non-reboot way to recover if something goes wrong.
224 */
225
226 static int lec_open(struct net_device *dev)
227 {
228 struct lec_priv *priv = (struct lec_priv *)dev->priv;
229
230 netif_start_queue(dev);
231 memset(&priv->stats, 0, sizeof(struct net_device_stats));
232
233 return 0;
234 }
235
236 static __inline__ void
237 lec_send(struct atm_vcc *vcc, struct sk_buff *skb, struct lec_priv *priv)
238 {
239 ATM_SKB(skb)->vcc = vcc;
240 ATM_SKB(skb)->atm_options = vcc->atm_options;
241
242 atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
243 if (vcc->send(vcc, skb) < 0) {
244 priv->stats.tx_dropped++;
245 return;
246 }
247
248 priv->stats.tx_packets++;
249 priv->stats.tx_bytes += skb->len;
250 }
251
252 static void lec_tx_timeout(struct net_device *dev)
253 {
254 printk(KERN_INFO "%s: tx timeout\n", dev->name);
255 dev->trans_start = jiffies;
256 netif_wake_queue(dev);
257 }
258
259 static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev)
260 {
261 struct sk_buff *skb2;
262 struct lec_priv *priv = (struct lec_priv *)dev->priv;
263 struct lecdatahdr_8023 *lec_h;
264 struct atm_vcc *vcc;
265 struct lec_arp_table *entry;
266 unsigned char *dst;
267 int min_frame_size;
268 #ifdef CONFIG_TR
269 unsigned char rdesc[ETH_ALEN]; /* Token Ring route descriptor */
270 #endif
271 int is_rdesc;
272 #if DUMP_PACKETS > 0
273 char buf[300];
274 int i = 0;
275 #endif /* DUMP_PACKETS >0 */
276
277 DPRINTK("lec_start_xmit called\n");
278 if (!priv->lecd) {
279 printk("%s:No lecd attached\n", dev->name);
280 priv->stats.tx_errors++;
281 netif_stop_queue(dev);
282 return -EUNATCH;
283 }
284
285 DPRINTK("skbuff head:%lx data:%lx tail:%lx end:%lx\n",
286 (long)skb->head, (long)skb->data, (long)skb->tail,
287 (long)skb->end);
288 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
289 if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0)
290 lec_handle_bridge(skb, dev);
291 #endif
292
293 /* Make sure we have room for lec_id */
294 if (skb_headroom(skb) < 2) {
295
296 DPRINTK("lec_start_xmit: reallocating skb\n");
297 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
298 kfree_skb(skb);
299 if (skb2 == NULL)
300 return 0;
301 skb = skb2;
302 }
303 skb_push(skb, 2);
304
305 /* Put le header to place, works for TokenRing too */
306 lec_h = (struct lecdatahdr_8023 *)skb->data;
307 lec_h->le_header = htons(priv->lecid);
308
309 #ifdef CONFIG_TR
310 /*
311 * Ugly. Use this to realign Token Ring packets for
312 * e.g. PCA-200E driver.
313 */
314 if (priv->is_trdev) {
315 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
316 kfree_skb(skb);
317 if (skb2 == NULL)
318 return 0;
319 skb = skb2;
320 }
321 #endif
322
323 #if DUMP_PACKETS > 0
324 printk("%s: send datalen:%ld lecid:%4.4x\n", dev->name,
325 skb->len, priv->lecid);
326 #if DUMP_PACKETS >= 2
327 for (i = 0; i < skb->len && i < 99; i++) {
328 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
329 }
330 #elif DUMP_PACKETS >= 1
331 for (i = 0; i < skb->len && i < 30; i++) {
332 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
333 }
334 #endif /* DUMP_PACKETS >= 1 */
335 if (i == skb->len)
336 printk("%s\n", buf);
337 else
338 printk("%s...\n", buf);
339 #endif /* DUMP_PACKETS > 0 */
340
341 /* Minimum ethernet-frame size */
342 #ifdef CONFIG_TR
343 if (priv->is_trdev)
344 min_frame_size = LEC_MINIMUM_8025_SIZE;
345 else
346 #endif
347 min_frame_size = LEC_MINIMUM_8023_SIZE;
348 if (skb->len < min_frame_size) {
349 if ((skb->len + skb_tailroom(skb)) < min_frame_size) {
350 skb2 = skb_copy_expand(skb, 0,
351 min_frame_size - skb->truesize,
352 GFP_ATOMIC);
353 dev_kfree_skb(skb);
354 if (skb2 == NULL) {
355 priv->stats.tx_dropped++;
356 return 0;
357 }
358 skb = skb2;
359 }
360 skb_put(skb, min_frame_size - skb->len);
361 }
362
363 /* Send to right vcc */
364 is_rdesc = 0;
365 dst = lec_h->h_dest;
366 #ifdef CONFIG_TR
367 if (priv->is_trdev) {
368 dst = get_tr_dst(skb->data + 2, rdesc);
369 if (dst == NULL) {
370 dst = rdesc;
371 is_rdesc = 1;
372 }
373 }
374 #endif
375 entry = NULL;
376 vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry);
377 DPRINTK("%s:vcc:%p vcc_flags:%x, entry:%p\n", dev->name,
378 vcc, vcc ? vcc->flags : 0, entry);
379 if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) {
380 if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) {
381 DPRINTK("%s:lec_start_xmit: queuing packet, ",
382 dev->name);
383 DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
384 lec_h->h_dest[0], lec_h->h_dest[1],
385 lec_h->h_dest[2], lec_h->h_dest[3],
386 lec_h->h_dest[4], lec_h->h_dest[5]);
387 skb_queue_tail(&entry->tx_wait, skb);
388 } else {
389 DPRINTK
390 ("%s:lec_start_xmit: tx queue full or no arp entry, dropping, ",
391 dev->name);
392 DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
393 lec_h->h_dest[0], lec_h->h_dest[1],
394 lec_h->h_dest[2], lec_h->h_dest[3],
395 lec_h->h_dest[4], lec_h->h_dest[5]);
396 priv->stats.tx_dropped++;
397 dev_kfree_skb(skb);
398 }
399 goto out;
400 }
401 #if DUMP_PACKETS > 0
402 printk("%s:sending to vpi:%d vci:%d\n", dev->name, vcc->vpi, vcc->vci);
403 #endif /* DUMP_PACKETS > 0 */
404
405 while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) {
406 DPRINTK("lec.c: emptying tx queue, ");
407 DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
408 lec_h->h_dest[0], lec_h->h_dest[1], lec_h->h_dest[2],
409 lec_h->h_dest[3], lec_h->h_dest[4], lec_h->h_dest[5]);
410 lec_send(vcc, skb2, priv);
411 }
412
413 lec_send(vcc, skb, priv);
414
415 if (!atm_may_send(vcc, 0)) {
416 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
417
418 vpriv->xoff = 1;
419 netif_stop_queue(dev);
420
421 /*
422 * vcc->pop() might have occurred in between, making
423 * the vcc usuable again. Since xmit is serialized,
424 * this is the only situation we have to re-test.
425 */
426
427 if (atm_may_send(vcc, 0))
428 netif_wake_queue(dev);
429 }
430
431 out:
432 if (entry)
433 lec_arp_put(entry);
434 dev->trans_start = jiffies;
435 return 0;
436 }
437
438 /* The inverse routine to net_open(). */
439 static int lec_close(struct net_device *dev)
440 {
441 netif_stop_queue(dev);
442 return 0;
443 }
444
445 /*
446 * Get the current statistics.
447 * This may be called with the card open or closed.
448 */
449 static struct net_device_stats *lec_get_stats(struct net_device *dev)
450 {
451 return &((struct lec_priv *)dev->priv)->stats;
452 }
453
454 static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
455 {
456 unsigned long flags;
457 struct net_device *dev = (struct net_device *)vcc->proto_data;
458 struct lec_priv *priv = (struct lec_priv *)dev->priv;
459 struct atmlec_msg *mesg;
460 struct lec_arp_table *entry;
461 int i;
462 char *tmp; /* FIXME */
463
464 atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
465 mesg = (struct atmlec_msg *)skb->data;
466 tmp = skb->data;
467 tmp += sizeof(struct atmlec_msg);
468 DPRINTK("%s: msg from zeppelin:%d\n", dev->name, mesg->type);
469 switch (mesg->type) {
470 case l_set_mac_addr:
471 for (i = 0; i < 6; i++) {
472 dev->dev_addr[i] = mesg->content.normal.mac_addr[i];
473 }
474 break;
475 case l_del_mac_addr:
476 for (i = 0; i < 6; i++) {
477 dev->dev_addr[i] = 0;
478 }
479 break;
480 case l_addr_delete:
481 lec_addr_delete(priv, mesg->content.normal.atm_addr,
482 mesg->content.normal.flag);
483 break;
484 case l_topology_change:
485 priv->topology_change = mesg->content.normal.flag;
486 break;
487 case l_flush_complete:
488 lec_flush_complete(priv, mesg->content.normal.flag);
489 break;
490 case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */
491 spin_lock_irqsave(&priv->lec_arp_lock, flags);
492 entry = lec_arp_find(priv, mesg->content.normal.mac_addr);
493 lec_arp_remove(priv, entry);
494 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
495
496 if (mesg->content.normal.no_source_le_narp)
497 break;
498 /* FALL THROUGH */
499 case l_arp_update:
500 lec_arp_update(priv, mesg->content.normal.mac_addr,
501 mesg->content.normal.atm_addr,
502 mesg->content.normal.flag,
503 mesg->content.normal.targetless_le_arp);
504 DPRINTK("lec: in l_arp_update\n");
505 if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */
506 DPRINTK("lec: LANE2 3.1.5, got tlvs, size %d\n",
507 mesg->sizeoftlvs);
508 lane2_associate_ind(dev, mesg->content.normal.mac_addr,
509 tmp, mesg->sizeoftlvs);
510 }
511 break;
512 case l_config:
513 priv->maximum_unknown_frame_count =
514 mesg->content.config.maximum_unknown_frame_count;
515 priv->max_unknown_frame_time =
516 (mesg->content.config.max_unknown_frame_time * HZ);
517 priv->max_retry_count = mesg->content.config.max_retry_count;
518 priv->aging_time = (mesg->content.config.aging_time * HZ);
519 priv->forward_delay_time =
520 (mesg->content.config.forward_delay_time * HZ);
521 priv->arp_response_time =
522 (mesg->content.config.arp_response_time * HZ);
523 priv->flush_timeout = (mesg->content.config.flush_timeout * HZ);
524 priv->path_switching_delay =
525 (mesg->content.config.path_switching_delay * HZ);
526 priv->lane_version = mesg->content.config.lane_version; /* LANE2 */
527 priv->lane2_ops = NULL;
528 if (priv->lane_version > 1)
529 priv->lane2_ops = &lane2_ops;
530 if (dev->change_mtu(dev, mesg->content.config.mtu))
531 printk("%s: change_mtu to %d failed\n", dev->name,
532 mesg->content.config.mtu);
533 priv->is_proxy = mesg->content.config.is_proxy;
534 break;
535 case l_flush_tran_id:
536 lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr,
537 mesg->content.normal.flag);
538 break;
539 case l_set_lecid:
540 priv->lecid =
541 (unsigned short)(0xffff & mesg->content.normal.flag);
542 break;
543 case l_should_bridge:
544 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
545 {
546 struct net_bridge_fdb_entry *f;
547
548 DPRINTK
549 ("%s: bridge zeppelin asks about 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
550 dev->name, mesg->content.proxy.mac_addr[0],
551 mesg->content.proxy.mac_addr[1],
552 mesg->content.proxy.mac_addr[2],
553 mesg->content.proxy.mac_addr[3],
554 mesg->content.proxy.mac_addr[4],
555 mesg->content.proxy.mac_addr[5]);
556
557 if (br_fdb_get_hook == NULL || dev->br_port == NULL)
558 break;
559
560 f = br_fdb_get_hook(dev->br_port->br,
561 mesg->content.proxy.mac_addr);
562 if (f != NULL && f->dst->dev != dev
563 && f->dst->state == BR_STATE_FORWARDING) {
564 /* hit from bridge table, send LE_ARP_RESPONSE */
565 struct sk_buff *skb2;
566 struct sock *sk;
567
568 DPRINTK
569 ("%s: entry found, responding to zeppelin\n",
570 dev->name);
571 skb2 =
572 alloc_skb(sizeof(struct atmlec_msg),
573 GFP_ATOMIC);
574 if (skb2 == NULL) {
575 br_fdb_put_hook(f);
576 break;
577 }
578 skb2->len = sizeof(struct atmlec_msg);
579 memcpy(skb2->data, mesg,
580 sizeof(struct atmlec_msg));
581 atm_force_charge(priv->lecd, skb2->truesize);
582 sk = sk_atm(priv->lecd);
583 skb_queue_tail(&sk->sk_receive_queue, skb2);
584 sk->sk_data_ready(sk, skb2->len);
585 }
586 if (f != NULL)
587 br_fdb_put_hook(f);
588 }
589 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
590 break;
591 default:
592 printk("%s: Unknown message type %d\n", dev->name, mesg->type);
593 dev_kfree_skb(skb);
594 return -EINVAL;
595 }
596 dev_kfree_skb(skb);
597 return 0;
598 }
599
600 static void lec_atm_close(struct atm_vcc *vcc)
601 {
602 struct sk_buff *skb;
603 struct net_device *dev = (struct net_device *)vcc->proto_data;
604 struct lec_priv *priv = (struct lec_priv *)dev->priv;
605
606 priv->lecd = NULL;
607 /* Do something needful? */
608
609 netif_stop_queue(dev);
610 lec_arp_destroy(priv);
611
612 if (skb_peek(&sk_atm(vcc)->sk_receive_queue))
613 printk("%s lec_atm_close: closing with messages pending\n",
614 dev->name);
615 while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue)) != NULL) {
616 atm_return(vcc, skb->truesize);
617 dev_kfree_skb(skb);
618 }
619
620 printk("%s: Shut down!\n", dev->name);
621 module_put(THIS_MODULE);
622 }
623
624 static struct atmdev_ops lecdev_ops = {
625 .close = lec_atm_close,
626 .send = lec_atm_send
627 };
628
629 static struct atm_dev lecatm_dev = {
630 .ops = &lecdev_ops,
631 .type = "lec",
632 .number = 999, /* dummy device number */
633 .lock = SPIN_LOCK_UNLOCKED
634 };
635
636 /*
637 * LANE2: new argument struct sk_buff *data contains
638 * the LE_ARP based TLVs introduced in the LANE2 spec
639 */
640 static int
641 send_to_lecd(struct lec_priv *priv, atmlec_msg_type type,
642 unsigned char *mac_addr, unsigned char *atm_addr,
643 struct sk_buff *data)
644 {
645 struct sock *sk;
646 struct sk_buff *skb;
647 struct atmlec_msg *mesg;
648
649 if (!priv || !priv->lecd) {
650 return -1;
651 }
652 skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
653 if (!skb)
654 return -1;
655 skb->len = sizeof(struct atmlec_msg);
656 mesg = (struct atmlec_msg *)skb->data;
657 memset(mesg, 0, sizeof(struct atmlec_msg));
658 mesg->type = type;
659 if (data != NULL)
660 mesg->sizeoftlvs = data->len;
661 if (mac_addr)
662 memcpy(&mesg->content.normal.mac_addr, mac_addr, ETH_ALEN);
663 else
664 mesg->content.normal.targetless_le_arp = 1;
665 if (atm_addr)
666 memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN);
667
668 atm_force_charge(priv->lecd, skb->truesize);
669 sk = sk_atm(priv->lecd);
670 skb_queue_tail(&sk->sk_receive_queue, skb);
671 sk->sk_data_ready(sk, skb->len);
672
673 if (data != NULL) {
674 DPRINTK("lec: about to send %d bytes of data\n", data->len);
675 atm_force_charge(priv->lecd, data->truesize);
676 skb_queue_tail(&sk->sk_receive_queue, data);
677 sk->sk_data_ready(sk, skb->len);
678 }
679
680 return 0;
681 }
682
683 /* shamelessly stolen from drivers/net/net_init.c */
684 static int lec_change_mtu(struct net_device *dev, int new_mtu)
685 {
686 if ((new_mtu < 68) || (new_mtu > 18190))
687 return -EINVAL;
688 dev->mtu = new_mtu;
689 return 0;
690 }
691
692 static void lec_set_multicast_list(struct net_device *dev)
693 {
694 /*
695 * by default, all multicast frames arrive over the bus.
696 * eventually support selective multicast service
697 */
698 return;
699 }
700
701 static void lec_init(struct net_device *dev)
702 {
703 dev->change_mtu = lec_change_mtu;
704 dev->open = lec_open;
705 dev->stop = lec_close;
706 dev->hard_start_xmit = lec_start_xmit;
707 dev->tx_timeout = lec_tx_timeout;
708
709 dev->get_stats = lec_get_stats;
710 dev->set_multicast_list = lec_set_multicast_list;
711 dev->do_ioctl = NULL;
712 printk("%s: Initialized!\n", dev->name);
713 return;
714 }
715
716 static unsigned char lec_ctrl_magic[] = {
717 0xff,
718 0x00,
719 0x01,
720 0x01
721 };
722
723 #define LEC_DATA_DIRECT_8023 2
724 #define LEC_DATA_DIRECT_8025 3
725
726 static int lec_is_data_direct(struct atm_vcc *vcc)
727 {
728 return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) ||
729 (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025));
730 }
731
732 static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb)
733 {
734 unsigned long flags;
735 struct net_device *dev = (struct net_device *)vcc->proto_data;
736 struct lec_priv *priv = (struct lec_priv *)dev->priv;
737
738 #if DUMP_PACKETS >0
739 int i = 0;
740 char buf[300];
741
742 printk("%s: lec_push vcc vpi:%d vci:%d\n", dev->name,
743 vcc->vpi, vcc->vci);
744 #endif
745 if (!skb) {
746 DPRINTK("%s: null skb\n", dev->name);
747 lec_vcc_close(priv, vcc);
748 return;
749 }
750 #if DUMP_PACKETS > 0
751 printk("%s: rcv datalen:%ld lecid:%4.4x\n", dev->name,
752 skb->len, priv->lecid);
753 #if DUMP_PACKETS >= 2
754 for (i = 0; i < skb->len && i < 99; i++) {
755 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
756 }
757 #elif DUMP_PACKETS >= 1
758 for (i = 0; i < skb->len && i < 30; i++) {
759 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
760 }
761 #endif /* DUMP_PACKETS >= 1 */
762 if (i == skb->len)
763 printk("%s\n", buf);
764 else
765 printk("%s...\n", buf);
766 #endif /* DUMP_PACKETS > 0 */
767 if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) { /* Control frame, to daemon */
768 struct sock *sk = sk_atm(vcc);
769
770 DPRINTK("%s: To daemon\n", dev->name);
771 skb_queue_tail(&sk->sk_receive_queue, skb);
772 sk->sk_data_ready(sk, skb->len);
773 } else { /* Data frame, queue to protocol handlers */
774 struct lec_arp_table *entry;
775 unsigned char *src, *dst;
776
777 atm_return(vcc, skb->truesize);
778 if (*(uint16_t *) skb->data == htons(priv->lecid) ||
779 !priv->lecd || !(dev->flags & IFF_UP)) {
780 /*
781 * Probably looping back, or if lecd is missing,
782 * lecd has gone down
783 */
784 DPRINTK("Ignoring frame...\n");
785 dev_kfree_skb(skb);
786 return;
787 }
788 #ifdef CONFIG_TR
789 if (priv->is_trdev)
790 dst = ((struct lecdatahdr_8025 *)skb->data)->h_dest;
791 else
792 #endif
793 dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest;
794
795 /*
796 * If this is a Data Direct VCC, and the VCC does not match
797 * the LE_ARP cache entry, delete the LE_ARP cache entry.
798 */
799 spin_lock_irqsave(&priv->lec_arp_lock, flags);
800 if (lec_is_data_direct(vcc)) {
801 #ifdef CONFIG_TR
802 if (priv->is_trdev)
803 src =
804 ((struct lecdatahdr_8025 *)skb->data)->
805 h_source;
806 else
807 #endif
808 src =
809 ((struct lecdatahdr_8023 *)skb->data)->
810 h_source;
811 entry = lec_arp_find(priv, src);
812 if (entry && entry->vcc != vcc) {
813 lec_arp_remove(priv, entry);
814 lec_arp_put(entry);
815 }
816 }
817 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
818
819 if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */
820 !priv->is_proxy && /* Proxy wants all the packets */
821 memcmp(dst, dev->dev_addr, dev->addr_len)) {
822 dev_kfree_skb(skb);
823 return;
824 }
825 if (!hlist_empty(&priv->lec_arp_empty_ones)) {
826 lec_arp_check_empties(priv, vcc, skb);
827 }
828 skb->dev = dev;
829 skb_pull(skb, 2); /* skip lec_id */
830 #ifdef CONFIG_TR
831 if (priv->is_trdev)
832 skb->protocol = tr_type_trans(skb, dev);
833 else
834 #endif
835 skb->protocol = eth_type_trans(skb, dev);
836 priv->stats.rx_packets++;
837 priv->stats.rx_bytes += skb->len;
838 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
839 netif_rx(skb);
840 }
841 }
842
843 static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb)
844 {
845 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
846 struct net_device *dev = skb->dev;
847
848 if (vpriv == NULL) {
849 printk("lec_pop(): vpriv = NULL!?!?!?\n");
850 return;
851 }
852
853 vpriv->old_pop(vcc, skb);
854
855 if (vpriv->xoff && atm_may_send(vcc, 0)) {
856 vpriv->xoff = 0;
857 if (netif_running(dev) && netif_queue_stopped(dev))
858 netif_wake_queue(dev);
859 }
860 }
861
862 static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg)
863 {
864 struct lec_vcc_priv *vpriv;
865 int bytes_left;
866 struct atmlec_ioc ioc_data;
867
868 /* Lecd must be up in this case */
869 bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc));
870 if (bytes_left != 0) {
871 printk
872 ("lec: lec_vcc_attach, copy from user failed for %d bytes\n",
873 bytes_left);
874 }
875 if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF ||
876 !dev_lec[ioc_data.dev_num])
877 return -EINVAL;
878 if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL)))
879 return -ENOMEM;
880 vpriv->xoff = 0;
881 vpriv->old_pop = vcc->pop;
882 vcc->user_back = vpriv;
883 vcc->pop = lec_pop;
884 lec_vcc_added(dev_lec[ioc_data.dev_num]->priv,
885 &ioc_data, vcc, vcc->push);
886 vcc->proto_data = dev_lec[ioc_data.dev_num];
887 vcc->push = lec_push;
888 return 0;
889 }
890
891 static int lec_mcast_attach(struct atm_vcc *vcc, int arg)
892 {
893 if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg])
894 return -EINVAL;
895 vcc->proto_data = dev_lec[arg];
896 return (lec_mcast_make((struct lec_priv *)dev_lec[arg]->priv, vcc));
897 }
898
899 /* Initialize device. */
900 static int lecd_attach(struct atm_vcc *vcc, int arg)
901 {
902 int i;
903 struct lec_priv *priv;
904
905 if (arg < 0)
906 i = 0;
907 else
908 i = arg;
909 #ifdef CONFIG_TR
910 if (arg >= MAX_LEC_ITF)
911 return -EINVAL;
912 #else /* Reserve the top NUM_TR_DEVS for TR */
913 if (arg >= (MAX_LEC_ITF - NUM_TR_DEVS))
914 return -EINVAL;
915 #endif
916 if (!dev_lec[i]) {
917 int is_trdev, size;
918
919 is_trdev = 0;
920 if (i >= (MAX_LEC_ITF - NUM_TR_DEVS))
921 is_trdev = 1;
922
923 size = sizeof(struct lec_priv);
924 #ifdef CONFIG_TR
925 if (is_trdev)
926 dev_lec[i] = alloc_trdev(size);
927 else
928 #endif
929 dev_lec[i] = alloc_etherdev(size);
930 if (!dev_lec[i])
931 return -ENOMEM;
932 snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i);
933 if (register_netdev(dev_lec[i])) {
934 free_netdev(dev_lec[i]);
935 return -EINVAL;
936 }
937
938 priv = dev_lec[i]->priv;
939 priv->is_trdev = is_trdev;
940 lec_init(dev_lec[i]);
941 } else {
942 priv = dev_lec[i]->priv;
943 if (priv->lecd)
944 return -EADDRINUSE;
945 }
946 lec_arp_init(priv);
947 priv->itfnum = i; /* LANE2 addition */
948 priv->lecd = vcc;
949 vcc->dev = &lecatm_dev;
950 vcc_insert_socket(sk_atm(vcc));
951
952 vcc->proto_data = dev_lec[i];
953 set_bit(ATM_VF_META, &vcc->flags);
954 set_bit(ATM_VF_READY, &vcc->flags);
955
956 /* Set default values to these variables */
957 priv->maximum_unknown_frame_count = 1;
958 priv->max_unknown_frame_time = (1 * HZ);
959 priv->vcc_timeout_period = (1200 * HZ);
960 priv->max_retry_count = 1;
961 priv->aging_time = (300 * HZ);
962 priv->forward_delay_time = (15 * HZ);
963 priv->topology_change = 0;
964 priv->arp_response_time = (1 * HZ);
965 priv->flush_timeout = (4 * HZ);
966 priv->path_switching_delay = (6 * HZ);
967
968 if (dev_lec[i]->flags & IFF_UP) {
969 netif_start_queue(dev_lec[i]);
970 }
971 __module_get(THIS_MODULE);
972 return i;
973 }
974
975 #ifdef CONFIG_PROC_FS
976 static char *lec_arp_get_status_string(unsigned char status)
977 {
978 static char *lec_arp_status_string[] = {
979 "ESI_UNKNOWN ",
980 "ESI_ARP_PENDING ",
981 "ESI_VC_PENDING ",
982 "<Undefined> ",
983 "ESI_FLUSH_PENDING ",
984 "ESI_FORWARD_DIRECT"
985 };
986
987 if (status > ESI_FORWARD_DIRECT)
988 status = 3; /* ESI_UNDEFINED */
989 return lec_arp_status_string[status];
990 }
991
992 static void lec_info(struct seq_file *seq, struct lec_arp_table *entry)
993 {
994 int i;
995
996 for (i = 0; i < ETH_ALEN; i++)
997 seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff);
998 seq_printf(seq, " ");
999 for (i = 0; i < ATM_ESA_LEN; i++)
1000 seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff);
1001 seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status),
1002 entry->flags & 0xffff);
1003 if (entry->vcc)
1004 seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci);
1005 else
1006 seq_printf(seq, " ");
1007 if (entry->recv_vcc) {
1008 seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi,
1009 entry->recv_vcc->vci);
1010 }
1011 seq_putc(seq, '\n');
1012 }
1013
1014 struct lec_state {
1015 unsigned long flags;
1016 struct lec_priv *locked;
1017 struct hlist_node *node;
1018 struct net_device *dev;
1019 int itf;
1020 int arp_table;
1021 int misc_table;
1022 };
1023
1024 static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl,
1025 loff_t *l)
1026 {
1027 struct hlist_node *e = state->node;
1028 struct lec_arp_table *tmp;
1029
1030 if (!e)
1031 e = tbl->first;
1032 if (e == (void *)1) {
1033 e = tbl->first;
1034 --*l;
1035 }
1036
1037 hlist_for_each_entry_from(tmp, e, next) {
1038 if (--*l < 0)
1039 break;
1040 }
1041 state->node = e;
1042
1043 return (*l < 0) ? state : NULL;
1044 }
1045
1046 static void *lec_arp_walk(struct lec_state *state, loff_t *l,
1047 struct lec_priv *priv)
1048 {
1049 void *v = NULL;
1050 int p;
1051
1052 for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) {
1053 v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l);
1054 if (v)
1055 break;
1056 }
1057 state->arp_table = p;
1058 return v;
1059 }
1060
1061 static void *lec_misc_walk(struct lec_state *state, loff_t *l,
1062 struct lec_priv *priv)
1063 {
1064 struct hlist_head *lec_misc_tables[] = {
1065 &priv->lec_arp_empty_ones,
1066 &priv->lec_no_forward,
1067 &priv->mcast_fwds
1068 };
1069 void *v = NULL;
1070 int q;
1071
1072 for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) {
1073 v = lec_tbl_walk(state, lec_misc_tables[q], l);
1074 if (v)
1075 break;
1076 }
1077 state->misc_table = q;
1078 return v;
1079 }
1080
1081 static void *lec_priv_walk(struct lec_state *state, loff_t *l,
1082 struct lec_priv *priv)
1083 {
1084 if (!state->locked) {
1085 state->locked = priv;
1086 spin_lock_irqsave(&priv->lec_arp_lock, state->flags);
1087 }
1088 if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) {
1089 spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags);
1090 state->locked = NULL;
1091 /* Partial state reset for the next time we get called */
1092 state->arp_table = state->misc_table = 0;
1093 }
1094 return state->locked;
1095 }
1096
1097 static void *lec_itf_walk(struct lec_state *state, loff_t *l)
1098 {
1099 struct net_device *dev;
1100 void *v;
1101
1102 dev = state->dev ? state->dev : dev_lec[state->itf];
1103 v = (dev && dev->priv) ? lec_priv_walk(state, l, dev->priv) : NULL;
1104 if (!v && dev) {
1105 dev_put(dev);
1106 /* Partial state reset for the next time we get called */
1107 dev = NULL;
1108 }
1109 state->dev = dev;
1110 return v;
1111 }
1112
1113 static void *lec_get_idx(struct lec_state *state, loff_t l)
1114 {
1115 void *v = NULL;
1116
1117 for (; state->itf < MAX_LEC_ITF; state->itf++) {
1118 v = lec_itf_walk(state, &l);
1119 if (v)
1120 break;
1121 }
1122 return v;
1123 }
1124
1125 static void *lec_seq_start(struct seq_file *seq, loff_t *pos)
1126 {
1127 struct lec_state *state = seq->private;
1128
1129 state->itf = 0;
1130 state->dev = NULL;
1131 state->locked = NULL;
1132 state->arp_table = 0;
1133 state->misc_table = 0;
1134 state->node = (void *)1;
1135
1136 return *pos ? lec_get_idx(state, *pos) : (void *)1;
1137 }
1138
1139 static void lec_seq_stop(struct seq_file *seq, void *v)
1140 {
1141 struct lec_state *state = seq->private;
1142
1143 if (state->dev) {
1144 spin_unlock_irqrestore(&state->locked->lec_arp_lock,
1145 state->flags);
1146 dev_put(state->dev);
1147 }
1148 }
1149
1150 static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1151 {
1152 struct lec_state *state = seq->private;
1153
1154 v = lec_get_idx(state, 1);
1155 *pos += !!PTR_ERR(v);
1156 return v;
1157 }
1158
1159 static int lec_seq_show(struct seq_file *seq, void *v)
1160 {
1161 static char lec_banner[] = "Itf MAC ATM destination"
1162 " Status Flags "
1163 "VPI/VCI Recv VPI/VCI\n";
1164
1165 if (v == (void *)1)
1166 seq_puts(seq, lec_banner);
1167 else {
1168 struct lec_state *state = seq->private;
1169 struct net_device *dev = state->dev;
1170 struct lec_arp_table *entry = hlist_entry(state->node, struct lec_arp_table, next);
1171
1172 seq_printf(seq, "%s ", dev->name);
1173 lec_info(seq, entry);
1174 }
1175 return 0;
1176 }
1177
1178 static struct seq_operations lec_seq_ops = {
1179 .start = lec_seq_start,
1180 .next = lec_seq_next,
1181 .stop = lec_seq_stop,
1182 .show = lec_seq_show,
1183 };
1184
1185 static int lec_seq_open(struct inode *inode, struct file *file)
1186 {
1187 struct lec_state *state;
1188 struct seq_file *seq;
1189 int rc = -EAGAIN;
1190
1191 state = kmalloc(sizeof(*state), GFP_KERNEL);
1192 if (!state) {
1193 rc = -ENOMEM;
1194 goto out;
1195 }
1196
1197 rc = seq_open(file, &lec_seq_ops);
1198 if (rc)
1199 goto out_kfree;
1200 seq = file->private_data;
1201 seq->private = state;
1202 out:
1203 return rc;
1204
1205 out_kfree:
1206 kfree(state);
1207 goto out;
1208 }
1209
1210 static int lec_seq_release(struct inode *inode, struct file *file)
1211 {
1212 return seq_release_private(inode, file);
1213 }
1214
1215 static struct file_operations lec_seq_fops = {
1216 .owner = THIS_MODULE,
1217 .open = lec_seq_open,
1218 .read = seq_read,
1219 .llseek = seq_lseek,
1220 .release = lec_seq_release,
1221 };
1222 #endif
1223
1224 static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1225 {
1226 struct atm_vcc *vcc = ATM_SD(sock);
1227 int err = 0;
1228
1229 switch (cmd) {
1230 case ATMLEC_CTRL:
1231 case ATMLEC_MCAST:
1232 case ATMLEC_DATA:
1233 if (!capable(CAP_NET_ADMIN))
1234 return -EPERM;
1235 break;
1236 default:
1237 return -ENOIOCTLCMD;
1238 }
1239
1240 switch (cmd) {
1241 case ATMLEC_CTRL:
1242 err = lecd_attach(vcc, (int)arg);
1243 if (err >= 0)
1244 sock->state = SS_CONNECTED;
1245 break;
1246 case ATMLEC_MCAST:
1247 err = lec_mcast_attach(vcc, (int)arg);
1248 break;
1249 case ATMLEC_DATA:
1250 err = lec_vcc_attach(vcc, (void __user *)arg);
1251 break;
1252 }
1253
1254 return err;
1255 }
1256
1257 static struct atm_ioctl lane_ioctl_ops = {
1258 .owner = THIS_MODULE,
1259 .ioctl = lane_ioctl,
1260 };
1261
1262 static int __init lane_module_init(void)
1263 {
1264 #ifdef CONFIG_PROC_FS
1265 struct proc_dir_entry *p;
1266
1267 p = create_proc_entry("lec", S_IRUGO, atm_proc_root);
1268 if (p)
1269 p->proc_fops = &lec_seq_fops;
1270 #endif
1271
1272 register_atm_ioctl(&lane_ioctl_ops);
1273 printk("lec.c: " __DATE__ " " __TIME__ " initialized\n");
1274 return 0;
1275 }
1276
1277 static void __exit lane_module_cleanup(void)
1278 {
1279 int i;
1280 struct lec_priv *priv;
1281
1282 remove_proc_entry("lec", atm_proc_root);
1283
1284 deregister_atm_ioctl(&lane_ioctl_ops);
1285
1286 for (i = 0; i < MAX_LEC_ITF; i++) {
1287 if (dev_lec[i] != NULL) {
1288 priv = (struct lec_priv *)dev_lec[i]->priv;
1289 unregister_netdev(dev_lec[i]);
1290 free_netdev(dev_lec[i]);
1291 dev_lec[i] = NULL;
1292 }
1293 }
1294
1295 return;
1296 }
1297
1298 module_init(lane_module_init);
1299 module_exit(lane_module_cleanup);
1300
1301 /*
1302 * LANE2: 3.1.3, LE_RESOLVE.request
1303 * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs.
1304 * If sizeoftlvs == NULL the default TLVs associated with with this
1305 * lec will be used.
1306 * If dst_mac == NULL, targetless LE_ARP will be sent
1307 */
1308 static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force,
1309 u8 **tlvs, u32 *sizeoftlvs)
1310 {
1311 unsigned long flags;
1312 struct lec_priv *priv = (struct lec_priv *)dev->priv;
1313 struct lec_arp_table *table;
1314 struct sk_buff *skb;
1315 int retval;
1316
1317 if (force == 0) {
1318 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1319 table = lec_arp_find(priv, dst_mac);
1320 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1321 if (table == NULL)
1322 return -1;
1323
1324 *tlvs = kmalloc(table->sizeoftlvs, GFP_ATOMIC);
1325 if (*tlvs == NULL)
1326 return -1;
1327
1328 memcpy(*tlvs, table->tlvs, table->sizeoftlvs);
1329 *sizeoftlvs = table->sizeoftlvs;
1330
1331 return 0;
1332 }
1333
1334 if (sizeoftlvs == NULL)
1335 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL);
1336
1337 else {
1338 skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC);
1339 if (skb == NULL)
1340 return -1;
1341 skb->len = *sizeoftlvs;
1342 memcpy(skb->data, *tlvs, *sizeoftlvs);
1343 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb);
1344 }
1345 return retval;
1346 }
1347
1348 /*
1349 * LANE2: 3.1.4, LE_ASSOCIATE.request
1350 * Associate the *tlvs with the *lan_dst address.
1351 * Will overwrite any previous association
1352 * Returns 1 for success, 0 for failure (out of memory)
1353 *
1354 */
1355 static int lane2_associate_req(struct net_device *dev, u8 *lan_dst,
1356 u8 *tlvs, u32 sizeoftlvs)
1357 {
1358 int retval;
1359 struct sk_buff *skb;
1360 struct lec_priv *priv = (struct lec_priv *)dev->priv;
1361
1362 if (compare_ether_addr(lan_dst, dev->dev_addr))
1363 return (0); /* not our mac address */
1364
1365 kfree(priv->tlvs); /* NULL if there was no previous association */
1366
1367 priv->tlvs = kmalloc(sizeoftlvs, GFP_KERNEL);
1368 if (priv->tlvs == NULL)
1369 return (0);
1370 priv->sizeoftlvs = sizeoftlvs;
1371 memcpy(priv->tlvs, tlvs, sizeoftlvs);
1372
1373 skb = alloc_skb(sizeoftlvs, GFP_ATOMIC);
1374 if (skb == NULL)
1375 return 0;
1376 skb->len = sizeoftlvs;
1377 memcpy(skb->data, tlvs, sizeoftlvs);
1378 retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb);
1379 if (retval != 0)
1380 printk("lec.c: lane2_associate_req() failed\n");
1381 /*
1382 * If the previous association has changed we must
1383 * somehow notify other LANE entities about the change
1384 */
1385 return (1);
1386 }
1387
1388 /*
1389 * LANE2: 3.1.5, LE_ASSOCIATE.indication
1390 *
1391 */
1392 static void lane2_associate_ind(struct net_device *dev, u8 *mac_addr,
1393 u8 *tlvs, u32 sizeoftlvs)
1394 {
1395 #if 0
1396 int i = 0;
1397 #endif
1398 struct lec_priv *priv = (struct lec_priv *)dev->priv;
1399 #if 0 /*
1400 * Why have the TLVs in LE_ARP entries
1401 * since we do not use them? When you
1402 * uncomment this code, make sure the
1403 * TLVs get freed when entry is killed
1404 */
1405 struct lec_arp_table *entry = lec_arp_find(priv, mac_addr);
1406
1407 if (entry == NULL)
1408 return; /* should not happen */
1409
1410 kfree(entry->tlvs);
1411
1412 entry->tlvs = kmalloc(sizeoftlvs, GFP_KERNEL);
1413 if (entry->tlvs == NULL)
1414 return;
1415
1416 entry->sizeoftlvs = sizeoftlvs;
1417 memcpy(entry->tlvs, tlvs, sizeoftlvs);
1418 #endif
1419 #if 0
1420 printk("lec.c: lane2_associate_ind()\n");
1421 printk("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs);
1422 while (i < sizeoftlvs)
1423 printk("%02x ", tlvs[i++]);
1424
1425 printk("\n");
1426 #endif
1427
1428 /* tell MPOA about the TLVs we saw */
1429 if (priv->lane2_ops && priv->lane2_ops->associate_indicator) {
1430 priv->lane2_ops->associate_indicator(dev, mac_addr,
1431 tlvs, sizeoftlvs);
1432 }
1433 return;
1434 }
1435
1436 /*
1437 * Here starts what used to lec_arpc.c
1438 *
1439 * lec_arpc.c was added here when making
1440 * lane client modular. October 1997
1441 */
1442
1443 #include <linux/types.h>
1444 #include <linux/sched.h>
1445 #include <linux/timer.h>
1446 #include <asm/param.h>
1447 #include <asm/atomic.h>
1448 #include <linux/inetdevice.h>
1449 #include <net/route.h>
1450
1451 #if 0
1452 #define DPRINTK(format,args...)
1453 /*
1454 #define DPRINTK printk
1455 */
1456 #endif
1457 #define DEBUG_ARP_TABLE 0
1458
1459 #define LEC_ARP_REFRESH_INTERVAL (3*HZ)
1460
1461 static void lec_arp_check_expire(void *data);
1462 static void lec_arp_expire_arp(unsigned long data);
1463
1464 /*
1465 * Arp table funcs
1466 */
1467
1468 #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE -1))
1469
1470 /*
1471 * Initialization of arp-cache
1472 */
1473 static void lec_arp_init(struct lec_priv *priv)
1474 {
1475 unsigned short i;
1476
1477 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1478 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1479 }
1480 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1481 INIT_HLIST_HEAD(&priv->lec_no_forward);
1482 INIT_HLIST_HEAD(&priv->mcast_fwds);
1483 spin_lock_init(&priv->lec_arp_lock);
1484 INIT_WORK(&priv->lec_arp_work, lec_arp_check_expire, priv);
1485 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1486 }
1487
1488 static void lec_arp_clear_vccs(struct lec_arp_table *entry)
1489 {
1490 if (entry->vcc) {
1491 struct atm_vcc *vcc = entry->vcc;
1492 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
1493 struct net_device *dev = (struct net_device *)vcc->proto_data;
1494
1495 vcc->pop = vpriv->old_pop;
1496 if (vpriv->xoff)
1497 netif_wake_queue(dev);
1498 kfree(vpriv);
1499 vcc->user_back = NULL;
1500 vcc->push = entry->old_push;
1501 vcc_release_async(vcc, -EPIPE);
1502 entry->vcc = NULL;
1503 }
1504 if (entry->recv_vcc) {
1505 entry->recv_vcc->push = entry->old_recv_push;
1506 vcc_release_async(entry->recv_vcc, -EPIPE);
1507 entry->recv_vcc = NULL;
1508 }
1509 }
1510
1511 /*
1512 * Insert entry to lec_arp_table
1513 * LANE2: Add to the end of the list to satisfy 8.1.13
1514 */
1515 static inline void
1516 lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry)
1517 {
1518 struct hlist_head *tmp;
1519
1520 tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])];
1521 hlist_add_head(&entry->next, tmp);
1522
1523 DPRINTK("LEC_ARP: Added entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1524 0xff & entry->mac_addr[0], 0xff & entry->mac_addr[1],
1525 0xff & entry->mac_addr[2], 0xff & entry->mac_addr[3],
1526 0xff & entry->mac_addr[4], 0xff & entry->mac_addr[5]);
1527 }
1528
1529 /*
1530 * Remove entry from lec_arp_table
1531 */
1532 static int
1533 lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove)
1534 {
1535 struct hlist_node *node;
1536 struct lec_arp_table *entry;
1537 int i, remove_vcc = 1;
1538
1539 if (!to_remove) {
1540 return -1;
1541 }
1542
1543 hlist_del(&to_remove->next);
1544 del_timer(&to_remove->timer);
1545
1546 /* If this is the only MAC connected to this VCC, also tear down the VCC */
1547 if (to_remove->status >= ESI_FLUSH_PENDING) {
1548 /*
1549 * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT
1550 */
1551 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1552 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
1553 if (memcmp(to_remove->atm_addr,
1554 entry->atm_addr, ATM_ESA_LEN) == 0) {
1555 remove_vcc = 0;
1556 break;
1557 }
1558 }
1559 }
1560 if (remove_vcc)
1561 lec_arp_clear_vccs(to_remove);
1562 }
1563 skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */
1564
1565 DPRINTK("LEC_ARP: Removed entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1566 0xff & to_remove->mac_addr[0], 0xff & to_remove->mac_addr[1],
1567 0xff & to_remove->mac_addr[2], 0xff & to_remove->mac_addr[3],
1568 0xff & to_remove->mac_addr[4], 0xff & to_remove->mac_addr[5]);
1569 return 0;
1570 }
1571
1572 #if DEBUG_ARP_TABLE
1573 static char *get_status_string(unsigned char st)
1574 {
1575 switch (st) {
1576 case ESI_UNKNOWN:
1577 return "ESI_UNKNOWN";
1578 case ESI_ARP_PENDING:
1579 return "ESI_ARP_PENDING";
1580 case ESI_VC_PENDING:
1581 return "ESI_VC_PENDING";
1582 case ESI_FLUSH_PENDING:
1583 return "ESI_FLUSH_PENDING";
1584 case ESI_FORWARD_DIRECT:
1585 return "ESI_FORWARD_DIRECT";
1586 default:
1587 return "<UNKNOWN>";
1588 }
1589 }
1590
1591 static void dump_arp_table(struct lec_priv *priv)
1592 {
1593 struct hlist_node *node;
1594 struct lec_arp_table *rulla;
1595 char buf[256];
1596 int i, j, offset;
1597
1598 printk("Dump %p:\n", priv);
1599 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1600 hlist_for_each_entry(rulla, node, &priv->lec_arp_tables[i], next) {
1601 offset = 0;
1602 offset += sprintf(buf, "%d: %p\n", i, rulla);
1603 offset += sprintf(buf + offset, "Mac:");
1604 for (j = 0; j < ETH_ALEN; j++) {
1605 offset += sprintf(buf + offset,
1606 "%2.2x ",
1607 rulla->mac_addr[j] & 0xff);
1608 }
1609 offset += sprintf(buf + offset, "Atm:");
1610 for (j = 0; j < ATM_ESA_LEN; j++) {
1611 offset += sprintf(buf + offset,
1612 "%2.2x ",
1613 rulla->atm_addr[j] & 0xff);
1614 }
1615 offset += sprintf(buf + offset,
1616 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1617 rulla->vcc ? rulla->vcc->vpi : 0,
1618 rulla->vcc ? rulla->vcc->vci : 0,
1619 rulla->recv_vcc ? rulla->recv_vcc->
1620 vpi : 0,
1621 rulla->recv_vcc ? rulla->recv_vcc->
1622 vci : 0, rulla->last_used,
1623 rulla->timestamp, rulla->no_tries);
1624 offset +=
1625 sprintf(buf + offset,
1626 "Flags:%x, Packets_flooded:%x, Status: %s ",
1627 rulla->flags, rulla->packets_flooded,
1628 get_status_string(rulla->status));
1629 printk("%s\n", buf);
1630 }
1631 }
1632
1633 if (!hlist_empty(&priv->lec_no_forward))
1634 printk("No forward\n");
1635 hlist_for_each_entry(rulla, node, &priv->lec_no_forward, next) {
1636 offset = 0;
1637 offset += sprintf(buf + offset, "Mac:");
1638 for (j = 0; j < ETH_ALEN; j++) {
1639 offset += sprintf(buf + offset, "%2.2x ",
1640 rulla->mac_addr[j] & 0xff);
1641 }
1642 offset += sprintf(buf + offset, "Atm:");
1643 for (j = 0; j < ATM_ESA_LEN; j++) {
1644 offset += sprintf(buf + offset, "%2.2x ",
1645 rulla->atm_addr[j] & 0xff);
1646 }
1647 offset += sprintf(buf + offset,
1648 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1649 rulla->vcc ? rulla->vcc->vpi : 0,
1650 rulla->vcc ? rulla->vcc->vci : 0,
1651 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1652 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1653 rulla->last_used,
1654 rulla->timestamp, rulla->no_tries);
1655 offset += sprintf(buf + offset,
1656 "Flags:%x, Packets_flooded:%x, Status: %s ",
1657 rulla->flags, rulla->packets_flooded,
1658 get_status_string(rulla->status));
1659 printk("%s\n", buf);
1660 }
1661
1662 if (!hlist_empty(&priv->lec_arp_empty_ones))
1663 printk("Empty ones\n");
1664 hlist_for_each_entry(rulla, node, &priv->lec_arp_empty_ones, next) {
1665 offset = 0;
1666 offset += sprintf(buf + offset, "Mac:");
1667 for (j = 0; j < ETH_ALEN; j++) {
1668 offset += sprintf(buf + offset, "%2.2x ",
1669 rulla->mac_addr[j] & 0xff);
1670 }
1671 offset += sprintf(buf + offset, "Atm:");
1672 for (j = 0; j < ATM_ESA_LEN; j++) {
1673 offset += sprintf(buf + offset, "%2.2x ",
1674 rulla->atm_addr[j] & 0xff);
1675 }
1676 offset += sprintf(buf + offset,
1677 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1678 rulla->vcc ? rulla->vcc->vpi : 0,
1679 rulla->vcc ? rulla->vcc->vci : 0,
1680 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1681 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1682 rulla->last_used,
1683 rulla->timestamp, rulla->no_tries);
1684 offset += sprintf(buf + offset,
1685 "Flags:%x, Packets_flooded:%x, Status: %s ",
1686 rulla->flags, rulla->packets_flooded,
1687 get_status_string(rulla->status));
1688 printk("%s", buf);
1689 }
1690
1691 if (!hlist_empty(&priv->mcast_fwds))
1692 printk("Multicast Forward VCCs\n");
1693 hlist_for_each_entry(rulla, node, &priv->mcast_fwds, next) {
1694 offset = 0;
1695 offset += sprintf(buf + offset, "Mac:");
1696 for (j = 0; j < ETH_ALEN; j++) {
1697 offset += sprintf(buf + offset, "%2.2x ",
1698 rulla->mac_addr[j] & 0xff);
1699 }
1700 offset += sprintf(buf + offset, "Atm:");
1701 for (j = 0; j < ATM_ESA_LEN; j++) {
1702 offset += sprintf(buf + offset, "%2.2x ",
1703 rulla->atm_addr[j] & 0xff);
1704 }
1705 offset += sprintf(buf + offset,
1706 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1707 rulla->vcc ? rulla->vcc->vpi : 0,
1708 rulla->vcc ? rulla->vcc->vci : 0,
1709 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1710 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1711 rulla->last_used,
1712 rulla->timestamp, rulla->no_tries);
1713 offset += sprintf(buf + offset,
1714 "Flags:%x, Packets_flooded:%x, Status: %s ",
1715 rulla->flags, rulla->packets_flooded,
1716 get_status_string(rulla->status));
1717 printk("%s\n", buf);
1718 }
1719
1720 }
1721 #else
1722 #define dump_arp_table(priv) do { } while (0)
1723 #endif
1724
1725 /*
1726 * Destruction of arp-cache
1727 */
1728 static void lec_arp_destroy(struct lec_priv *priv)
1729 {
1730 unsigned long flags;
1731 struct hlist_node *node, *next;
1732 struct lec_arp_table *entry;
1733 int i;
1734
1735 cancel_rearming_delayed_work(&priv->lec_arp_work);
1736
1737 /*
1738 * Remove all entries
1739 */
1740
1741 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1742 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1743 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
1744 lec_arp_remove(priv, entry);
1745 lec_arp_put(entry);
1746 }
1747 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1748 }
1749
1750 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
1751 del_timer_sync(&entry->timer);
1752 lec_arp_clear_vccs(entry);
1753 hlist_del(&entry->next);
1754 lec_arp_put(entry);
1755 }
1756 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1757
1758 hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) {
1759 del_timer_sync(&entry->timer);
1760 lec_arp_clear_vccs(entry);
1761 hlist_del(&entry->next);
1762 lec_arp_put(entry);
1763 }
1764 INIT_HLIST_HEAD(&priv->lec_no_forward);
1765
1766 hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) {
1767 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
1768 lec_arp_clear_vccs(entry);
1769 hlist_del(&entry->next);
1770 lec_arp_put(entry);
1771 }
1772 INIT_HLIST_HEAD(&priv->mcast_fwds);
1773 priv->mcast_vcc = NULL;
1774 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1775 }
1776
1777 /*
1778 * Find entry by mac_address
1779 */
1780 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
1781 unsigned char *mac_addr)
1782 {
1783 struct hlist_node *node;
1784 struct hlist_head *head;
1785 struct lec_arp_table *entry;
1786
1787 DPRINTK("LEC_ARP: lec_arp_find :%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1788 mac_addr[0] & 0xff, mac_addr[1] & 0xff, mac_addr[2] & 0xff,
1789 mac_addr[3] & 0xff, mac_addr[4] & 0xff, mac_addr[5] & 0xff);
1790
1791 head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])];
1792 hlist_for_each_entry(entry, node, head, next) {
1793 if (!compare_ether_addr(mac_addr, entry->mac_addr)) {
1794 return entry;
1795 }
1796 }
1797 return NULL;
1798 }
1799
1800 static struct lec_arp_table *make_entry(struct lec_priv *priv,
1801 unsigned char *mac_addr)
1802 {
1803 struct lec_arp_table *to_return;
1804
1805 to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC);
1806 if (!to_return) {
1807 printk("LEC: Arp entry kmalloc failed\n");
1808 return NULL;
1809 }
1810 memcpy(to_return->mac_addr, mac_addr, ETH_ALEN);
1811 INIT_HLIST_NODE(&to_return->next);
1812 init_timer(&to_return->timer);
1813 to_return->timer.function = lec_arp_expire_arp;
1814 to_return->timer.data = (unsigned long)to_return;
1815 to_return->last_used = jiffies;
1816 to_return->priv = priv;
1817 skb_queue_head_init(&to_return->tx_wait);
1818 atomic_set(&to_return->usage, 1);
1819 return to_return;
1820 }
1821
1822 /* Arp sent timer expired */
1823 static void lec_arp_expire_arp(unsigned long data)
1824 {
1825 struct lec_arp_table *entry;
1826
1827 entry = (struct lec_arp_table *)data;
1828
1829 DPRINTK("lec_arp_expire_arp\n");
1830 if (entry->status == ESI_ARP_PENDING) {
1831 if (entry->no_tries <= entry->priv->max_retry_count) {
1832 if (entry->is_rdesc)
1833 send_to_lecd(entry->priv, l_rdesc_arp_xmt,
1834 entry->mac_addr, NULL, NULL);
1835 else
1836 send_to_lecd(entry->priv, l_arp_xmt,
1837 entry->mac_addr, NULL, NULL);
1838 entry->no_tries++;
1839 }
1840 mod_timer(&entry->timer, jiffies + (1 * HZ));
1841 }
1842 }
1843
1844 /* Unknown/unused vcc expire, remove associated entry */
1845 static void lec_arp_expire_vcc(unsigned long data)
1846 {
1847 unsigned long flags;
1848 struct lec_arp_table *to_remove = (struct lec_arp_table *)data;
1849 struct lec_priv *priv = (struct lec_priv *)to_remove->priv;
1850
1851 del_timer(&to_remove->timer);
1852
1853 DPRINTK("LEC_ARP %p %p: lec_arp_expire_vcc vpi:%d vci:%d\n",
1854 to_remove, priv,
1855 to_remove->vcc ? to_remove->recv_vcc->vpi : 0,
1856 to_remove->vcc ? to_remove->recv_vcc->vci : 0);
1857
1858 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1859 hlist_del(&to_remove->next);
1860 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1861
1862 lec_arp_clear_vccs(to_remove);
1863 lec_arp_put(to_remove);
1864 }
1865
1866 /*
1867 * Expire entries.
1868 * 1. Re-set timer
1869 * 2. For each entry, delete entries that have aged past the age limit.
1870 * 3. For each entry, depending on the status of the entry, perform
1871 * the following maintenance.
1872 * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the
1873 * tick_count is above the max_unknown_frame_time, clear
1874 * the tick_count to zero and clear the packets_flooded counter
1875 * to zero. This supports the packet rate limit per address
1876 * while flooding unknowns.
1877 * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater
1878 * than or equal to the path_switching_delay, change the status
1879 * to ESI_FORWARD_DIRECT. This causes the flush period to end
1880 * regardless of the progress of the flush protocol.
1881 */
1882 static void lec_arp_check_expire(void *data)
1883 {
1884 unsigned long flags;
1885 struct lec_priv *priv = data;
1886 struct hlist_node *node, *next;
1887 struct lec_arp_table *entry;
1888 unsigned long now;
1889 unsigned long time_to_check;
1890 int i;
1891
1892 DPRINTK("lec_arp_check_expire %p\n", priv);
1893 now = jiffies;
1894 restart:
1895 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1896 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1897 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
1898 if ((entry->flags) & LEC_REMOTE_FLAG &&
1899 priv->topology_change)
1900 time_to_check = priv->forward_delay_time;
1901 else
1902 time_to_check = priv->aging_time;
1903
1904 DPRINTK("About to expire: %lx - %lx > %lx\n",
1905 now, entry->last_used, time_to_check);
1906 if (time_after(now, entry->last_used + time_to_check)
1907 && !(entry->flags & LEC_PERMANENT_FLAG)
1908 && !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */
1909 /* Remove entry */
1910 DPRINTK("LEC:Entry timed out\n");
1911 lec_arp_remove(priv, entry);
1912 lec_arp_put(entry);
1913 } else {
1914 /* Something else */
1915 if ((entry->status == ESI_VC_PENDING ||
1916 entry->status == ESI_ARP_PENDING)
1917 && time_after_eq(now,
1918 entry->timestamp +
1919 priv->
1920 max_unknown_frame_time)) {
1921 entry->timestamp = jiffies;
1922 entry->packets_flooded = 0;
1923 if (entry->status == ESI_VC_PENDING)
1924 send_to_lecd(priv, l_svc_setup,
1925 entry->mac_addr,
1926 entry->atm_addr,
1927 NULL);
1928 }
1929 if (entry->status == ESI_FLUSH_PENDING
1930 &&
1931 time_after_eq(now, entry->timestamp +
1932 priv->path_switching_delay)) {
1933 struct sk_buff *skb;
1934 struct atm_vcc *vcc = entry->vcc;
1935
1936 lec_arp_hold(entry);
1937 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1938 while ((skb = skb_dequeue(&entry->tx_wait)) != NULL)
1939 lec_send(vcc, skb, entry->priv);
1940 entry->last_used = jiffies;
1941 entry->status = ESI_FORWARD_DIRECT;
1942 lec_arp_put(entry);
1943 goto restart;
1944 }
1945 }
1946 }
1947 }
1948 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1949
1950 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1951 }
1952
1953 /*
1954 * Try to find vcc where mac_address is attached.
1955 *
1956 */
1957 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
1958 unsigned char *mac_to_find, int is_rdesc,
1959 struct lec_arp_table **ret_entry)
1960 {
1961 unsigned long flags;
1962 struct lec_arp_table *entry;
1963 struct atm_vcc *found;
1964
1965 if (mac_to_find[0] & 0x01) {
1966 switch (priv->lane_version) {
1967 case 1:
1968 return priv->mcast_vcc;
1969 break;
1970 case 2: /* LANE2 wants arp for multicast addresses */
1971 if (!compare_ether_addr(mac_to_find, bus_mac))
1972 return priv->mcast_vcc;
1973 break;
1974 default:
1975 break;
1976 }
1977 }
1978
1979 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1980 entry = lec_arp_find(priv, mac_to_find);
1981
1982 if (entry) {
1983 if (entry->status == ESI_FORWARD_DIRECT) {
1984 /* Connection Ok */
1985 entry->last_used = jiffies;
1986 lec_arp_hold(entry);
1987 *ret_entry = entry;
1988 found = entry->vcc;
1989 goto out;
1990 }
1991 /*
1992 * If the LE_ARP cache entry is still pending, reset count to 0
1993 * so another LE_ARP request can be made for this frame.
1994 */
1995 if (entry->status == ESI_ARP_PENDING) {
1996 entry->no_tries = 0;
1997 }
1998 /*
1999 * Data direct VC not yet set up, check to see if the unknown
2000 * frame count is greater than the limit. If the limit has
2001 * not been reached, allow the caller to send packet to
2002 * BUS.
2003 */
2004 if (entry->status != ESI_FLUSH_PENDING &&
2005 entry->packets_flooded <
2006 priv->maximum_unknown_frame_count) {
2007 entry->packets_flooded++;
2008 DPRINTK("LEC_ARP: Flooding..\n");
2009 found = priv->mcast_vcc;
2010 goto out;
2011 }
2012 /*
2013 * We got here because entry->status == ESI_FLUSH_PENDING
2014 * or BUS flood limit was reached for an entry which is
2015 * in ESI_ARP_PENDING or ESI_VC_PENDING state.
2016 */
2017 lec_arp_hold(entry);
2018 *ret_entry = entry;
2019 DPRINTK("lec: entry->status %d entry->vcc %p\n", entry->status,
2020 entry->vcc);
2021 found = NULL;
2022 } else {
2023 /* No matching entry was found */
2024 entry = make_entry(priv, mac_to_find);
2025 DPRINTK("LEC_ARP: Making entry\n");
2026 if (!entry) {
2027 found = priv->mcast_vcc;
2028 goto out;
2029 }
2030 lec_arp_add(priv, entry);
2031 /* We want arp-request(s) to be sent */
2032 entry->packets_flooded = 1;
2033 entry->status = ESI_ARP_PENDING;
2034 entry->no_tries = 1;
2035 entry->last_used = entry->timestamp = jiffies;
2036 entry->is_rdesc = is_rdesc;
2037 if (entry->is_rdesc)
2038 send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL,
2039 NULL);
2040 else
2041 send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL);
2042 entry->timer.expires = jiffies + (1 * HZ);
2043 entry->timer.function = lec_arp_expire_arp;
2044 add_timer(&entry->timer);
2045 found = priv->mcast_vcc;
2046 }
2047
2048 out:
2049 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2050 return found;
2051 }
2052
2053 static int
2054 lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr,
2055 unsigned long permanent)
2056 {
2057 unsigned long flags;
2058 struct hlist_node *node, *next;
2059 struct lec_arp_table *entry;
2060 int i;
2061
2062 DPRINTK("lec_addr_delete\n");
2063 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2064 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2065 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
2066 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)
2067 && (permanent ||
2068 !(entry->flags & LEC_PERMANENT_FLAG))) {
2069 lec_arp_remove(priv, entry);
2070 lec_arp_put(entry);
2071 }
2072 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2073 return 0;
2074 }
2075 }
2076 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2077 return -1;
2078 }
2079
2080 /*
2081 * Notifies: Response to arp_request (atm_addr != NULL)
2082 */
2083 static void
2084 lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr,
2085 unsigned char *atm_addr, unsigned long remoteflag,
2086 unsigned int targetless_le_arp)
2087 {
2088 unsigned long flags;
2089 struct hlist_node *node, *next;
2090 struct lec_arp_table *entry, *tmp;
2091 int i;
2092
2093 DPRINTK("lec:%s", (targetless_le_arp) ? "targetless " : " ");
2094 DPRINTK("lec_arp_update mac:%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
2095 mac_addr[0], mac_addr[1], mac_addr[2], mac_addr[3],
2096 mac_addr[4], mac_addr[5]);
2097
2098 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2099 entry = lec_arp_find(priv, mac_addr);
2100 if (entry == NULL && targetless_le_arp)
2101 goto out; /*
2102 * LANE2: ignore targetless LE_ARPs for which
2103 * we have no entry in the cache. 7.1.30
2104 */
2105 if (!hlist_empty(&priv->lec_arp_empty_ones)) {
2106 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2107 if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) {
2108 hlist_del(&entry->next);
2109 del_timer(&entry->timer);
2110 tmp = lec_arp_find(priv, mac_addr);
2111 if (tmp) {
2112 del_timer(&tmp->timer);
2113 tmp->status = ESI_FORWARD_DIRECT;
2114 memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN);
2115 tmp->vcc = entry->vcc;
2116 tmp->old_push = entry->old_push;
2117 tmp->last_used = jiffies;
2118 del_timer(&entry->timer);
2119 lec_arp_put(entry);
2120 entry = tmp;
2121 } else {
2122 entry->status = ESI_FORWARD_DIRECT;
2123 memcpy(entry->mac_addr, mac_addr, ETH_ALEN);
2124 entry->last_used = jiffies;
2125 lec_arp_add(priv, entry);
2126 }
2127 if (remoteflag)
2128 entry->flags |= LEC_REMOTE_FLAG;
2129 else
2130 entry->flags &= ~LEC_REMOTE_FLAG;
2131 DPRINTK("After update\n");
2132 dump_arp_table(priv);
2133 goto out;
2134 }
2135 }
2136 }
2137
2138 entry = lec_arp_find(priv, mac_addr);
2139 if (!entry) {
2140 entry = make_entry(priv, mac_addr);
2141 if (!entry)
2142 goto out;
2143 entry->status = ESI_UNKNOWN;
2144 lec_arp_add(priv, entry);
2145 /* Temporary, changes before end of function */
2146 }
2147 memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN);
2148 del_timer(&entry->timer);
2149 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2150 hlist_for_each_entry(tmp, node, &priv->lec_arp_tables[i], next) {
2151 if (entry != tmp &&
2152 !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) {
2153 /* Vcc to this host exists */
2154 if (tmp->status > ESI_VC_PENDING) {
2155 /*
2156 * ESI_FLUSH_PENDING,
2157 * ESI_FORWARD_DIRECT
2158 */
2159 entry->vcc = tmp->vcc;
2160 entry->old_push = tmp->old_push;
2161 }
2162 entry->status = tmp->status;
2163 break;
2164 }
2165 }
2166 }
2167 if (remoteflag)
2168 entry->flags |= LEC_REMOTE_FLAG;
2169 else
2170 entry->flags &= ~LEC_REMOTE_FLAG;
2171 if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) {
2172 entry->status = ESI_VC_PENDING;
2173 send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL);
2174 }
2175 DPRINTK("After update2\n");
2176 dump_arp_table(priv);
2177 out:
2178 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2179 }
2180
2181 /*
2182 * Notifies: Vcc setup ready
2183 */
2184 static void
2185 lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data,
2186 struct atm_vcc *vcc,
2187 void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb))
2188 {
2189 unsigned long flags;
2190 struct hlist_node *node;
2191 struct lec_arp_table *entry;
2192 int i, found_entry = 0;
2193
2194 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2195 if (ioc_data->receive == 2) {
2196 /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */
2197
2198 DPRINTK("LEC_ARP: Attaching mcast forward\n");
2199 #if 0
2200 entry = lec_arp_find(priv, bus_mac);
2201 if (!entry) {
2202 printk("LEC_ARP: Multicast entry not found!\n");
2203 goto out;
2204 }
2205 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2206 entry->recv_vcc = vcc;
2207 entry->old_recv_push = old_push;
2208 #endif
2209 entry = make_entry(priv, bus_mac);
2210 if (entry == NULL)
2211 goto out;
2212 del_timer(&entry->timer);
2213 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2214 entry->recv_vcc = vcc;
2215 entry->old_recv_push = old_push;
2216 hlist_add_head(&entry->next, &priv->mcast_fwds);
2217 goto out;
2218 } else if (ioc_data->receive == 1) {
2219 /*
2220 * Vcc which we don't want to make default vcc,
2221 * attach it anyway.
2222 */
2223 DPRINTK
2224 ("LEC_ARP:Attaching data direct, not default: "
2225 "%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",
2226 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2227 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2228 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2229 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2230 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2231 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2232 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2233 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2234 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2235 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2236 entry = make_entry(priv, bus_mac);
2237 if (entry == NULL)
2238 goto out;
2239 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2240 memset(entry->mac_addr, 0, ETH_ALEN);
2241 entry->recv_vcc = vcc;
2242 entry->old_recv_push = old_push;
2243 entry->status = ESI_UNKNOWN;
2244 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2245 entry->timer.function = lec_arp_expire_vcc;
2246 hlist_add_head(&entry->next, &priv->lec_no_forward);
2247 add_timer(&entry->timer);
2248 dump_arp_table(priv);
2249 goto out;
2250 }
2251 DPRINTK
2252 ("LEC_ARP:Attaching data direct, default: "
2253 "%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",
2254 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2255 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2256 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2257 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2258 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2259 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2260 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2261 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2262 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2263 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2264 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2265 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2266 if (memcmp
2267 (ioc_data->atm_addr, entry->atm_addr,
2268 ATM_ESA_LEN) == 0) {
2269 DPRINTK("LEC_ARP: Attaching data direct\n");
2270 DPRINTK("Currently -> Vcc: %d, Rvcc:%d\n",
2271 entry->vcc ? entry->vcc->vci : 0,
2272 entry->recv_vcc ? entry->recv_vcc->
2273 vci : 0);
2274 found_entry = 1;
2275 del_timer(&entry->timer);
2276 entry->vcc = vcc;
2277 entry->old_push = old_push;
2278 if (entry->status == ESI_VC_PENDING) {
2279 if (priv->maximum_unknown_frame_count
2280 == 0)
2281 entry->status =
2282 ESI_FORWARD_DIRECT;
2283 else {
2284 entry->timestamp = jiffies;
2285 entry->status =
2286 ESI_FLUSH_PENDING;
2287 #if 0
2288 send_to_lecd(priv, l_flush_xmt,
2289 NULL,
2290 entry->atm_addr,
2291 NULL);
2292 #endif
2293 }
2294 } else {
2295 /*
2296 * They were forming a connection
2297 * to us, and we to them. Our
2298 * ATM address is numerically lower
2299 * than theirs, so we make connection
2300 * we formed into default VCC (8.1.11).
2301 * Connection they made gets torn
2302 * down. This might confuse some
2303 * clients. Can be changed if
2304 * someone reports trouble...
2305 */
2306 ;
2307 }
2308 }
2309 }
2310 }
2311 if (found_entry) {
2312 DPRINTK("After vcc was added\n");
2313 dump_arp_table(priv);
2314 goto out;
2315 }
2316 /*
2317 * Not found, snatch address from first data packet that arrives
2318 * from this vcc
2319 */
2320 entry = make_entry(priv, bus_mac);
2321 if (!entry)
2322 goto out;
2323 entry->vcc = vcc;
2324 entry->old_push = old_push;
2325 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2326 memset(entry->mac_addr, 0, ETH_ALEN);
2327 entry->status = ESI_UNKNOWN;
2328 hlist_add_head(&entry->next, &priv->lec_arp_empty_ones);
2329 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2330 entry->timer.function = lec_arp_expire_vcc;
2331 add_timer(&entry->timer);
2332 DPRINTK("After vcc was added\n");
2333 dump_arp_table(priv);
2334 out:
2335 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2336 }
2337
2338 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id)
2339 {
2340 unsigned long flags;
2341 struct hlist_node *node;
2342 struct lec_arp_table *entry;
2343 int i;
2344
2345 DPRINTK("LEC:lec_flush_complete %lx\n", tran_id);
2346 restart:
2347 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2348 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2349 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2350 if (entry->flush_tran_id == tran_id
2351 && entry->status == ESI_FLUSH_PENDING) {
2352 struct sk_buff *skb;
2353 struct atm_vcc *vcc = entry->vcc;
2354
2355 lec_arp_hold(entry);
2356 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2357 while ((skb = skb_dequeue(&entry->tx_wait)) != NULL)
2358 lec_send(vcc, skb, entry->priv);
2359 entry->last_used = jiffies;
2360 entry->status = ESI_FORWARD_DIRECT;
2361 lec_arp_put(entry);
2362 DPRINTK("LEC_ARP: Flushed\n");
2363 goto restart;
2364 }
2365 }
2366 }
2367 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2368 dump_arp_table(priv);
2369 }
2370
2371 static void
2372 lec_set_flush_tran_id(struct lec_priv *priv,
2373 unsigned char *atm_addr, unsigned long tran_id)
2374 {
2375 unsigned long flags;
2376 struct hlist_node *node;
2377 struct lec_arp_table *entry;
2378 int i;
2379
2380 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2381 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
2382 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2383 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) {
2384 entry->flush_tran_id = tran_id;
2385 DPRINTK("Set flush transaction id to %lx for %p\n",
2386 tran_id, entry);
2387 }
2388 }
2389 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2390 }
2391
2392 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc)
2393 {
2394 unsigned long flags;
2395 unsigned char mac_addr[] = {
2396 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
2397 };
2398 struct lec_arp_table *to_add;
2399 struct lec_vcc_priv *vpriv;
2400 int err = 0;
2401
2402 if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL)))
2403 return -ENOMEM;
2404 vpriv->xoff = 0;
2405 vpriv->old_pop = vcc->pop;
2406 vcc->user_back = vpriv;
2407 vcc->pop = lec_pop;
2408 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2409 to_add = make_entry(priv, mac_addr);
2410 if (!to_add) {
2411 vcc->pop = vpriv->old_pop;
2412 kfree(vpriv);
2413 err = -ENOMEM;
2414 goto out;
2415 }
2416 memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN);
2417 to_add->status = ESI_FORWARD_DIRECT;
2418 to_add->flags |= LEC_PERMANENT_FLAG;
2419 to_add->vcc = vcc;
2420 to_add->old_push = vcc->push;
2421 vcc->push = lec_push;
2422 priv->mcast_vcc = vcc;
2423 lec_arp_add(priv, to_add);
2424 out:
2425 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2426 return err;
2427 }
2428
2429 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc)
2430 {
2431 unsigned long flags;
2432 struct hlist_node *node, *next;
2433 struct lec_arp_table *entry;
2434 int i;
2435
2436 DPRINTK("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci);
2437 dump_arp_table(priv);
2438
2439 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2440
2441 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2442 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
2443 if (vcc == entry->vcc) {
2444 lec_arp_remove(priv, entry);
2445 lec_arp_put(entry);
2446 if (priv->mcast_vcc == vcc) {
2447 priv->mcast_vcc = NULL;
2448 }
2449 }
2450 }
2451 }
2452
2453 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2454 if (entry->vcc == vcc) {
2455 lec_arp_clear_vccs(entry);
2456 del_timer(&entry->timer);
2457 hlist_del(&entry->next);
2458 lec_arp_put(entry);
2459 }
2460 }
2461
2462 hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) {
2463 if (entry->recv_vcc == vcc) {
2464 lec_arp_clear_vccs(entry);
2465 del_timer(&entry->timer);
2466 hlist_del(&entry->next);
2467 lec_arp_put(entry);
2468 }
2469 }
2470
2471 hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) {
2472 if (entry->recv_vcc == vcc) {
2473 lec_arp_clear_vccs(entry);
2474 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
2475 hlist_del(&entry->next);
2476 lec_arp_put(entry);
2477 }
2478 }
2479
2480 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2481 dump_arp_table(priv);
2482 }
2483
2484 static void
2485 lec_arp_check_empties(struct lec_priv *priv,
2486 struct atm_vcc *vcc, struct sk_buff *skb)
2487 {
2488 unsigned long flags;
2489 struct hlist_node *node, *next;
2490 struct lec_arp_table *entry, *tmp;
2491 struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data;
2492 unsigned char *src;
2493 #ifdef CONFIG_TR
2494 struct lecdatahdr_8025 *tr_hdr = (struct lecdatahdr_8025 *)skb->data;
2495
2496 if (priv->is_trdev)
2497 src = tr_hdr->h_source;
2498 else
2499 #endif
2500 src = hdr->h_source;
2501
2502 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2503 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2504 if (vcc == entry->vcc) {
2505 del_timer(&entry->timer);
2506 memcpy(entry->mac_addr, src, ETH_ALEN);
2507 entry->status = ESI_FORWARD_DIRECT;
2508 entry->last_used = jiffies;
2509 /* We might have got an entry */
2510 if ((tmp = lec_arp_find(priv, src))) {
2511 lec_arp_remove(priv, tmp);
2512 lec_arp_put(tmp);
2513 }
2514 hlist_del(&entry->next);
2515 lec_arp_add(priv, entry);
2516 goto out;
2517 }
2518 }
2519 DPRINTK("LEC_ARP: Arp_check_empties: entry not found!\n");
2520 out:
2521 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2522 }
2523
2524 MODULE_LICENSE("GPL");
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