?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
[MIPS] Cobalt: Move UART base definition to arch/mips/cobalt/console.c
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / atm / lec.c
blob59d5aa3366f229636ec7ca7a1ab8d821e8d97b41
1 /*
2 * lec.c: Lan Emulation driver
3 *
4 * Marko Kiiskila <mkiiskila@yahoo.com>
5 */
6
7 #include <linux/kernel.h>
8 #include <linux/bitops.h>
9 #include <linux/capability.h>
10
11 /* We are ethernet device */
12 #include <linux/if_ether.h>
13 #include <linux/netdevice.h>
14 #include <linux/etherdevice.h>
15 #include <net/sock.h>
16 #include <linux/skbuff.h>
17 #include <linux/ip.h>
18 #include <asm/byteorder.h>
19 #include <asm/uaccess.h>
20 #include <net/arp.h>
21 #include <net/dst.h>
22 #include <linux/proc_fs.h>
23 #include <linux/spinlock.h>
24 #include <linux/seq_file.h>
25
26 /* TokenRing if needed */
27 #ifdef CONFIG_TR
28 #include <linux/trdevice.h>
29 #endif
30
31 /* And atm device */
32 #include <linux/atmdev.h>
33 #include <linux/atmlec.h>
34
35 /* Proxy LEC knows about bridging */
36 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
37 #include <linux/if_bridge.h>
38 #include "../bridge/br_private.h"
39
40 static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 };
41 #endif
42
43 /* Modular too */
44 #include <linux/module.h>
45 #include <linux/init.h>
46
47 #include "lec.h"
48 #include "lec_arpc.h"
49 #include "resources.h"
50
51 #if 0
52 #define DPRINTK printk
53 #else
54 #define DPRINTK(format,args...)
55 #endif
56
57 #define DUMP_PACKETS 0 /*
58 * 0 = None,
59 * 1 = 30 first bytes
60 * 2 = Whole packet
61 */
62
63 #define LEC_UNRES_QUE_LEN 8 /*
64 * number of tx packets to queue for a
65 * single destination while waiting for SVC
66 */
67
68 static int lec_open(struct net_device *dev);
69 static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev);
70 static int lec_close(struct net_device *dev);
71 static struct net_device_stats *lec_get_stats(struct net_device *dev);
72 static void lec_init(struct net_device *dev);
73 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
74 unsigned char *mac_addr);
75 static int lec_arp_remove(struct lec_priv *priv,
76 struct lec_arp_table *to_remove);
77 /* LANE2 functions */
78 static void lane2_associate_ind(struct net_device *dev, u8 *mac_address,
79 u8 *tlvs, u32 sizeoftlvs);
80 static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force,
81 u8 **tlvs, u32 *sizeoftlvs);
82 static int lane2_associate_req(struct net_device *dev, u8 *lan_dst,
83 u8 *tlvs, u32 sizeoftlvs);
84
85 static int lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr,
86 unsigned long permanent);
87 static void lec_arp_check_empties(struct lec_priv *priv,
88 struct atm_vcc *vcc, struct sk_buff *skb);
89 static void lec_arp_destroy(struct lec_priv *priv);
90 static void lec_arp_init(struct lec_priv *priv);
91 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
92 unsigned char *mac_to_find,
93 int is_rdesc,
94 struct lec_arp_table **ret_entry);
95 static void lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr,
96 unsigned char *atm_addr, unsigned long remoteflag,
97 unsigned int targetless_le_arp);
98 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id);
99 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc);
100 static void lec_set_flush_tran_id(struct lec_priv *priv,
101 unsigned char *atm_addr,
102 unsigned long tran_id);
103 static void lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data,
104 struct atm_vcc *vcc,
105 void (*old_push) (struct atm_vcc *vcc,
106 struct sk_buff *skb));
107 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc);
108
109 /* must be done under lec_arp_lock */
110 static inline void lec_arp_hold(struct lec_arp_table *entry)
111 {
112 atomic_inc(&entry->usage);
113 }
114
115 static inline void lec_arp_put(struct lec_arp_table *entry)
116 {
117 if (atomic_dec_and_test(&entry->usage))
118 kfree(entry);
119 }
120
121
122 static struct lane2_ops lane2_ops = {
123 lane2_resolve, /* resolve, spec 3.1.3 */
124 lane2_associate_req, /* associate_req, spec 3.1.4 */
125 NULL /* associate indicator, spec 3.1.5 */
126 };
127
128 static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
129
130 /* Device structures */
131 static struct net_device *dev_lec[MAX_LEC_ITF];
132
133 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
134 static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev)
135 {
136 struct ethhdr *eth;
137 char *buff;
138 struct lec_priv *priv;
139
140 /*
141 * Check if this is a BPDU. If so, ask zeppelin to send
142 * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit
143 * as the Config BPDU has
144 */
145 eth = (struct ethhdr *)skb->data;
146 buff = skb->data + skb->dev->hard_header_len;
147 if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) {
148 struct sock *sk;
149 struct sk_buff *skb2;
150 struct atmlec_msg *mesg;
151
152 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
153 if (skb2 == NULL)
154 return;
155 skb2->len = sizeof(struct atmlec_msg);
156 mesg = (struct atmlec_msg *)skb2->data;
157 mesg->type = l_topology_change;
158 buff += 4;
159 mesg->content.normal.flag = *buff & 0x01; /* 0x01 is topology change */
160
161 priv = (struct lec_priv *)dev->priv;
162 atm_force_charge(priv->lecd, skb2->truesize);
163 sk = sk_atm(priv->lecd);
164 skb_queue_tail(&sk->sk_receive_queue, skb2);
165 sk->sk_data_ready(sk, skb2->len);
166 }
167
168 return;
169 }
170 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
171
172 /*
173 * Modelled after tr_type_trans
174 * All multicast and ARE or STE frames go to BUS.
175 * Non source routed frames go by destination address.
176 * Last hop source routed frames go by destination address.
177 * Not last hop source routed frames go by _next_ route descriptor.
178 * Returns pointer to destination MAC address or fills in rdesc
179 * and returns NULL.
180 */
181 #ifdef CONFIG_TR
182 static unsigned char *get_tr_dst(unsigned char *packet, unsigned char *rdesc)
183 {
184 struct trh_hdr *trh;
185 int riflen, num_rdsc;
186
187 trh = (struct trh_hdr *)packet;
188 if (trh->daddr[0] & (uint8_t) 0x80)
189 return bus_mac; /* multicast */
190
191 if (trh->saddr[0] & TR_RII) {
192 riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8;
193 if ((ntohs(trh->rcf) >> 13) != 0)
194 return bus_mac; /* ARE or STE */
195 } else
196 return trh->daddr; /* not source routed */
197
198 if (riflen < 6)
199 return trh->daddr; /* last hop, source routed */
200
201 /* riflen is 6 or more, packet has more than one route descriptor */
202 num_rdsc = (riflen / 2) - 1;
203 memset(rdesc, 0, ETH_ALEN);
204 /* offset 4 comes from LAN destination field in LE control frames */
205 if (trh->rcf & htons((uint16_t) TR_RCF_DIR_BIT))
206 memcpy(&rdesc[4], &trh->rseg[num_rdsc - 2], sizeof(__be16));
207 else {
208 memcpy(&rdesc[4], &trh->rseg[1], sizeof(__be16));
209 rdesc[5] = ((ntohs(trh->rseg[0]) & 0x000f) | (rdesc[5] & 0xf0));
210 }
211
212 return NULL;
213 }
214 #endif /* CONFIG_TR */
215
216 /*
217 * Open/initialize the netdevice. This is called (in the current kernel)
218 * sometime after booting when the 'ifconfig' program is run.
219 *
220 * This routine should set everything up anew at each open, even
221 * registers that "should" only need to be set once at boot, so that
222 * there is non-reboot way to recover if something goes wrong.
223 */
224
225 static int lec_open(struct net_device *dev)
226 {
227 struct lec_priv *priv = (struct lec_priv *)dev->priv;
228
229 netif_start_queue(dev);
230 memset(&priv->stats, 0, sizeof(struct net_device_stats));
231
232 return 0;
233 }
234
235 static __inline__ void
236 lec_send(struct atm_vcc *vcc, struct sk_buff *skb, struct lec_priv *priv)
237 {
238 ATM_SKB(skb)->vcc = vcc;
239 ATM_SKB(skb)->atm_options = vcc->atm_options;
240
241 atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
242 if (vcc->send(vcc, skb) < 0) {
243 priv->stats.tx_dropped++;
244 return;
245 }
246
247 priv->stats.tx_packets++;
248 priv->stats.tx_bytes += skb->len;
249 }
250
251 static void lec_tx_timeout(struct net_device *dev)
252 {
253 printk(KERN_INFO "%s: tx timeout\n", dev->name);
254 dev->trans_start = jiffies;
255 netif_wake_queue(dev);
256 }
257
258 static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev)
259 {
260 struct sk_buff *skb2;
261 struct lec_priv *priv = (struct lec_priv *)dev->priv;
262 struct lecdatahdr_8023 *lec_h;
263 struct atm_vcc *vcc;
264 struct lec_arp_table *entry;
265 unsigned char *dst;
266 int min_frame_size;
267 #ifdef CONFIG_TR
268 unsigned char rdesc[ETH_ALEN]; /* Token Ring route descriptor */
269 #endif
270 int is_rdesc;
271 #if DUMP_PACKETS > 0
272 char buf[300];
273 int i = 0;
274 #endif /* DUMP_PACKETS >0 */
275
276 DPRINTK("lec_start_xmit called\n");
277 if (!priv->lecd) {
278 printk("%s:No lecd attached\n", dev->name);
279 priv->stats.tx_errors++;
280 netif_stop_queue(dev);
281 return -EUNATCH;
282 }
283
284 DPRINTK("skbuff head:%lx data:%lx tail:%lx end:%lx\n",
285 (long)skb->head, (long)skb->data, (long)skb_tail_pointer(skb),
286 (long)skb_end_pointer(skb));
287 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
288 if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0)
289 lec_handle_bridge(skb, dev);
290 #endif
291
292 /* Make sure we have room for lec_id */
293 if (skb_headroom(skb) < 2) {
294
295 DPRINTK("lec_start_xmit: reallocating skb\n");
296 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
297 kfree_skb(skb);
298 if (skb2 == NULL)
299 return 0;
300 skb = skb2;
301 }
302 skb_push(skb, 2);
303
304 /* Put le header to place, works for TokenRing too */
305 lec_h = (struct lecdatahdr_8023 *)skb->data;
306 lec_h->le_header = htons(priv->lecid);
307
308 #ifdef CONFIG_TR
309 /*
310 * Ugly. Use this to realign Token Ring packets for
311 * e.g. PCA-200E driver.
312 */
313 if (priv->is_trdev) {
314 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
315 kfree_skb(skb);
316 if (skb2 == NULL)
317 return 0;
318 skb = skb2;
319 }
320 #endif
321
322 #if DUMP_PACKETS > 0
323 printk("%s: send datalen:%ld lecid:%4.4x\n", dev->name,
324 skb->len, priv->lecid);
325 #if DUMP_PACKETS >= 2
326 for (i = 0; i < skb->len && i < 99; i++) {
327 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
328 }
329 #elif DUMP_PACKETS >= 1
330 for (i = 0; i < skb->len && i < 30; i++) {
331 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
332 }
333 #endif /* DUMP_PACKETS >= 1 */
334 if (i == skb->len)
335 printk("%s\n", buf);
336 else
337 printk("%s...\n", buf);
338 #endif /* DUMP_PACKETS > 0 */
339
340 /* Minimum ethernet-frame size */
341 #ifdef CONFIG_TR
342 if (priv->is_trdev)
343 min_frame_size = LEC_MINIMUM_8025_SIZE;
344 else
345 #endif
346 min_frame_size = LEC_MINIMUM_8023_SIZE;
347 if (skb->len < min_frame_size) {
348 if ((skb->len + skb_tailroom(skb)) < min_frame_size) {
349 skb2 = skb_copy_expand(skb, 0,
350 min_frame_size - skb->truesize,
351 GFP_ATOMIC);
352 dev_kfree_skb(skb);
353 if (skb2 == NULL) {
354 priv->stats.tx_dropped++;
355 return 0;
356 }
357 skb = skb2;
358 }
359 skb_put(skb, min_frame_size - skb->len);
360 }
361
362 /* Send to right vcc */
363 is_rdesc = 0;
364 dst = lec_h->h_dest;
365 #ifdef CONFIG_TR
366 if (priv->is_trdev) {
367 dst = get_tr_dst(skb->data + 2, rdesc);
368 if (dst == NULL) {
369 dst = rdesc;
370 is_rdesc = 1;
371 }
372 }
373 #endif
374 entry = NULL;
375 vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry);
376 DPRINTK("%s:vcc:%p vcc_flags:%x, entry:%p\n", dev->name,
377 vcc, vcc ? vcc->flags : 0, entry);
378 if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) {
379 if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) {
380 DPRINTK("%s:lec_start_xmit: queuing packet, ",
381 dev->name);
382 DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
383 lec_h->h_dest[0], lec_h->h_dest[1],
384 lec_h->h_dest[2], lec_h->h_dest[3],
385 lec_h->h_dest[4], lec_h->h_dest[5]);
386 skb_queue_tail(&entry->tx_wait, skb);
387 } else {
388 DPRINTK
389 ("%s:lec_start_xmit: tx queue full or no arp entry, dropping, ",
390 dev->name);
391 DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
392 lec_h->h_dest[0], lec_h->h_dest[1],
393 lec_h->h_dest[2], lec_h->h_dest[3],
394 lec_h->h_dest[4], lec_h->h_dest[5]);
395 priv->stats.tx_dropped++;
396 dev_kfree_skb(skb);
397 }
398 goto out;
399 }
400 #if DUMP_PACKETS > 0
401 printk("%s:sending to vpi:%d vci:%d\n", dev->name, vcc->vpi, vcc->vci);
402 #endif /* DUMP_PACKETS > 0 */
403
404 while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) {
405 DPRINTK("lec.c: emptying tx queue, ");
406 DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
407 lec_h->h_dest[0], lec_h->h_dest[1], lec_h->h_dest[2],
408 lec_h->h_dest[3], lec_h->h_dest[4], lec_h->h_dest[5]);
409 lec_send(vcc, skb2, priv);
410 }
411
412 lec_send(vcc, skb, priv);
413
414 if (!atm_may_send(vcc, 0)) {
415 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
416
417 vpriv->xoff = 1;
418 netif_stop_queue(dev);
419
420 /*
421 * vcc->pop() might have occurred in between, making
422 * the vcc usuable again. Since xmit is serialized,
423 * this is the only situation we have to re-test.
424 */
425
426 if (atm_may_send(vcc, 0))
427 netif_wake_queue(dev);
428 }
429
430 out:
431 if (entry)
432 lec_arp_put(entry);
433 dev->trans_start = jiffies;
434 return 0;
435 }
436
437 /* The inverse routine to net_open(). */
438 static int lec_close(struct net_device *dev)
439 {
440 netif_stop_queue(dev);
441 return 0;
442 }
443
444 /*
445 * Get the current statistics.
446 * This may be called with the card open or closed.
447 */
448 static struct net_device_stats *lec_get_stats(struct net_device *dev)
449 {
450 return &((struct lec_priv *)dev->priv)->stats;
451 }
452
453 static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
454 {
455 unsigned long flags;
456 struct net_device *dev = (struct net_device *)vcc->proto_data;
457 struct lec_priv *priv = (struct lec_priv *)dev->priv;
458 struct atmlec_msg *mesg;
459 struct lec_arp_table *entry;
460 int i;
461 char *tmp; /* FIXME */
462
463 atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
464 mesg = (struct atmlec_msg *)skb->data;
465 tmp = skb->data;
466 tmp += sizeof(struct atmlec_msg);
467 DPRINTK("%s: msg from zeppelin:%d\n", dev->name, mesg->type);
468 switch (mesg->type) {
469 case l_set_mac_addr:
470 for (i = 0; i < 6; i++) {
471 dev->dev_addr[i] = mesg->content.normal.mac_addr[i];
472 }
473 break;
474 case l_del_mac_addr:
475 for (i = 0; i < 6; i++) {
476 dev->dev_addr[i] = 0;
477 }
478 break;
479 case l_addr_delete:
480 lec_addr_delete(priv, mesg->content.normal.atm_addr,
481 mesg->content.normal.flag);
482 break;
483 case l_topology_change:
484 priv->topology_change = mesg->content.normal.flag;
485 break;
486 case l_flush_complete:
487 lec_flush_complete(priv, mesg->content.normal.flag);
488 break;
489 case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */
490 spin_lock_irqsave(&priv->lec_arp_lock, flags);
491 entry = lec_arp_find(priv, mesg->content.normal.mac_addr);
492 lec_arp_remove(priv, entry);
493 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
494
495 if (mesg->content.normal.no_source_le_narp)
496 break;
497 /* FALL THROUGH */
498 case l_arp_update:
499 lec_arp_update(priv, mesg->content.normal.mac_addr,
500 mesg->content.normal.atm_addr,
501 mesg->content.normal.flag,
502 mesg->content.normal.targetless_le_arp);
503 DPRINTK("lec: in l_arp_update\n");
504 if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */
505 DPRINTK("lec: LANE2 3.1.5, got tlvs, size %d\n",
506 mesg->sizeoftlvs);
507 lane2_associate_ind(dev, mesg->content.normal.mac_addr,
508 tmp, mesg->sizeoftlvs);
509 }
510 break;
511 case l_config:
512 priv->maximum_unknown_frame_count =
513 mesg->content.config.maximum_unknown_frame_count;
514 priv->max_unknown_frame_time =
515 (mesg->content.config.max_unknown_frame_time * HZ);
516 priv->max_retry_count = mesg->content.config.max_retry_count;
517 priv->aging_time = (mesg->content.config.aging_time * HZ);
518 priv->forward_delay_time =
519 (mesg->content.config.forward_delay_time * HZ);
520 priv->arp_response_time =
521 (mesg->content.config.arp_response_time * HZ);
522 priv->flush_timeout = (mesg->content.config.flush_timeout * HZ);
523 priv->path_switching_delay =
524 (mesg->content.config.path_switching_delay * HZ);
525 priv->lane_version = mesg->content.config.lane_version; /* LANE2 */
526 priv->lane2_ops = NULL;
527 if (priv->lane_version > 1)
528 priv->lane2_ops = &lane2_ops;
529 if (dev->change_mtu(dev, mesg->content.config.mtu))
530 printk("%s: change_mtu to %d failed\n", dev->name,
531 mesg->content.config.mtu);
532 priv->is_proxy = mesg->content.config.is_proxy;
533 break;
534 case l_flush_tran_id:
535 lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr,
536 mesg->content.normal.flag);
537 break;
538 case l_set_lecid:
539 priv->lecid =
540 (unsigned short)(0xffff & mesg->content.normal.flag);
541 break;
542 case l_should_bridge:
543 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
544 {
545 struct net_bridge_fdb_entry *f;
546
547 DPRINTK
548 ("%s: bridge zeppelin asks about 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
549 dev->name, mesg->content.proxy.mac_addr[0],
550 mesg->content.proxy.mac_addr[1],
551 mesg->content.proxy.mac_addr[2],
552 mesg->content.proxy.mac_addr[3],
553 mesg->content.proxy.mac_addr[4],
554 mesg->content.proxy.mac_addr[5]);
555
556 if (br_fdb_get_hook == NULL || dev->br_port == NULL)
557 break;
558
559 f = br_fdb_get_hook(dev->br_port->br,
560 mesg->content.proxy.mac_addr);
561 if (f != NULL && f->dst->dev != dev
562 && f->dst->state == BR_STATE_FORWARDING) {
563 /* hit from bridge table, send LE_ARP_RESPONSE */
564 struct sk_buff *skb2;
565 struct sock *sk;
566
567 DPRINTK
568 ("%s: entry found, responding to zeppelin\n",
569 dev->name);
570 skb2 =
571 alloc_skb(sizeof(struct atmlec_msg),
572 GFP_ATOMIC);
573 if (skb2 == NULL) {
574 br_fdb_put_hook(f);
575 break;
576 }
577 skb2->len = sizeof(struct atmlec_msg);
578 skb_copy_to_linear_data(skb2, mesg,
579 sizeof(*mesg));
580 atm_force_charge(priv->lecd, skb2->truesize);
581 sk = sk_atm(priv->lecd);
582 skb_queue_tail(&sk->sk_receive_queue, skb2);
583 sk->sk_data_ready(sk, skb2->len);
584 }
585 if (f != NULL)
586 br_fdb_put_hook(f);
587 }
588 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
589 break;
590 default:
591 printk("%s: Unknown message type %d\n", dev->name, mesg->type);
592 dev_kfree_skb(skb);
593 return -EINVAL;
594 }
595 dev_kfree_skb(skb);
596 return 0;
597 }
598
599 static void lec_atm_close(struct atm_vcc *vcc)
600 {
601 struct sk_buff *skb;
602 struct net_device *dev = (struct net_device *)vcc->proto_data;
603 struct lec_priv *priv = (struct lec_priv *)dev->priv;
604
605 priv->lecd = NULL;
606 /* Do something needful? */
607
608 netif_stop_queue(dev);
609 lec_arp_destroy(priv);
610
611 if (skb_peek(&sk_atm(vcc)->sk_receive_queue))
612 printk("%s lec_atm_close: closing with messages pending\n",
613 dev->name);
614 while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue)) != NULL) {
615 atm_return(vcc, skb->truesize);
616 dev_kfree_skb(skb);
617 }
618
619 printk("%s: Shut down!\n", dev->name);
620 module_put(THIS_MODULE);
621 }
622
623 static struct atmdev_ops lecdev_ops = {
624 .close = lec_atm_close,
625 .send = lec_atm_send
626 };
627
628 static struct atm_dev lecatm_dev = {
629 .ops = &lecdev_ops,
630 .type = "lec",
631 .number = 999, /* dummy device number */
632 .lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock)
633 };
634
635 /*
636 * LANE2: new argument struct sk_buff *data contains
637 * the LE_ARP based TLVs introduced in the LANE2 spec
638 */
639 static int
640 send_to_lecd(struct lec_priv *priv, atmlec_msg_type type,
641 unsigned char *mac_addr, unsigned char *atm_addr,
642 struct sk_buff *data)
643 {
644 struct sock *sk;
645 struct sk_buff *skb;
646 struct atmlec_msg *mesg;
647
648 if (!priv || !priv->lecd) {
649 return -1;
650 }
651 skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
652 if (!skb)
653 return -1;
654 skb->len = sizeof(struct atmlec_msg);
655 mesg = (struct atmlec_msg *)skb->data;
656 memset(mesg, 0, sizeof(struct atmlec_msg));
657 mesg->type = type;
658 if (data != NULL)
659 mesg->sizeoftlvs = data->len;
660 if (mac_addr)
661 memcpy(&mesg->content.normal.mac_addr, mac_addr, ETH_ALEN);
662 else
663 mesg->content.normal.targetless_le_arp = 1;
664 if (atm_addr)
665 memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN);
666
667 atm_force_charge(priv->lecd, skb->truesize);
668 sk = sk_atm(priv->lecd);
669 skb_queue_tail(&sk->sk_receive_queue, skb);
670 sk->sk_data_ready(sk, skb->len);
671
672 if (data != NULL) {
673 DPRINTK("lec: about to send %d bytes of data\n", data->len);
674 atm_force_charge(priv->lecd, data->truesize);
675 skb_queue_tail(&sk->sk_receive_queue, data);
676 sk->sk_data_ready(sk, skb->len);
677 }
678
679 return 0;
680 }
681
682 /* shamelessly stolen from drivers/net/net_init.c */
683 static int lec_change_mtu(struct net_device *dev, int new_mtu)
684 {
685 if ((new_mtu < 68) || (new_mtu > 18190))
686 return -EINVAL;
687 dev->mtu = new_mtu;
688 return 0;
689 }
690
691 static void lec_set_multicast_list(struct net_device *dev)
692 {
693 /*
694 * by default, all multicast frames arrive over the bus.
695 * eventually support selective multicast service
696 */
697 return;
698 }
699
700 static void lec_init(struct net_device *dev)
701 {
702 dev->change_mtu = lec_change_mtu;
703 dev->open = lec_open;
704 dev->stop = lec_close;
705 dev->hard_start_xmit = lec_start_xmit;
706 dev->tx_timeout = lec_tx_timeout;
707
708 dev->get_stats = lec_get_stats;
709 dev->set_multicast_list = lec_set_multicast_list;
710 dev->do_ioctl = NULL;
711 printk("%s: Initialized!\n", dev->name);
712 return;
713 }
714
715 static unsigned char lec_ctrl_magic[] = {
716 0xff,
717 0x00,
718 0x01,
719 0x01
720 };
721
722 #define LEC_DATA_DIRECT_8023 2
723 #define LEC_DATA_DIRECT_8025 3
724
725 static int lec_is_data_direct(struct atm_vcc *vcc)
726 {
727 return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) ||
728 (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025));
729 }
730
731 static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb)
732 {
733 unsigned long flags;
734 struct net_device *dev = (struct net_device *)vcc->proto_data;
735 struct lec_priv *priv = (struct lec_priv *)dev->priv;
736
737 #if DUMP_PACKETS >0
738 int i = 0;
739 char buf[300];
740
741 printk("%s: lec_push vcc vpi:%d vci:%d\n", dev->name,
742 vcc->vpi, vcc->vci);
743 #endif
744 if (!skb) {
745 DPRINTK("%s: null skb\n", dev->name);
746 lec_vcc_close(priv, vcc);
747 return;
748 }
749 #if DUMP_PACKETS > 0
750 printk("%s: rcv datalen:%ld lecid:%4.4x\n", dev->name,
751 skb->len, priv->lecid);
752 #if DUMP_PACKETS >= 2
753 for (i = 0; i < skb->len && i < 99; i++) {
754 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
755 }
756 #elif DUMP_PACKETS >= 1
757 for (i = 0; i < skb->len && i < 30; i++) {
758 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
759 }
760 #endif /* DUMP_PACKETS >= 1 */
761 if (i == skb->len)
762 printk("%s\n", buf);
763 else
764 printk("%s...\n", buf);
765 #endif /* DUMP_PACKETS > 0 */
766 if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) { /* Control frame, to daemon */
767 struct sock *sk = sk_atm(vcc);
768
769 DPRINTK("%s: To daemon\n", dev->name);
770 skb_queue_tail(&sk->sk_receive_queue, skb);
771 sk->sk_data_ready(sk, skb->len);
772 } else { /* Data frame, queue to protocol handlers */
773 struct lec_arp_table *entry;
774 unsigned char *src, *dst;
775
776 atm_return(vcc, skb->truesize);
777 if (*(__be16 *) skb->data == htons(priv->lecid) ||
778 !priv->lecd || !(dev->flags & IFF_UP)) {
779 /*
780 * Probably looping back, or if lecd is missing,
781 * lecd has gone down
782 */
783 DPRINTK("Ignoring frame...\n");
784 dev_kfree_skb(skb);
785 return;
786 }
787 #ifdef CONFIG_TR
788 if (priv->is_trdev)
789 dst = ((struct lecdatahdr_8025 *)skb->data)->h_dest;
790 else
791 #endif
792 dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest;
793
794 /*
795 * If this is a Data Direct VCC, and the VCC does not match
796 * the LE_ARP cache entry, delete the LE_ARP cache entry.
797 */
798 spin_lock_irqsave(&priv->lec_arp_lock, flags);
799 if (lec_is_data_direct(vcc)) {
800 #ifdef CONFIG_TR
801 if (priv->is_trdev)
802 src =
803 ((struct lecdatahdr_8025 *)skb->data)->
804 h_source;
805 else
806 #endif
807 src =
808 ((struct lecdatahdr_8023 *)skb->data)->
809 h_source;
810 entry = lec_arp_find(priv, src);
811 if (entry && entry->vcc != vcc) {
812 lec_arp_remove(priv, entry);
813 lec_arp_put(entry);
814 }
815 }
816 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
817
818 if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */
819 !priv->is_proxy && /* Proxy wants all the packets */
820 memcmp(dst, dev->dev_addr, dev->addr_len)) {
821 dev_kfree_skb(skb);
822 return;
823 }
824 if (!hlist_empty(&priv->lec_arp_empty_ones)) {
825 lec_arp_check_empties(priv, vcc, skb);
826 }
827 skb_pull(skb, 2); /* skip lec_id */
828 #ifdef CONFIG_TR
829 if (priv->is_trdev)
830 skb->protocol = tr_type_trans(skb, dev);
831 else
832 #endif
833 skb->protocol = eth_type_trans(skb, dev);
834 priv->stats.rx_packets++;
835 priv->stats.rx_bytes += skb->len;
836 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
837 netif_rx(skb);
838 }
839 }
840
841 static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb)
842 {
843 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
844 struct net_device *dev = skb->dev;
845
846 if (vpriv == NULL) {
847 printk("lec_pop(): vpriv = NULL!?!?!?\n");
848 return;
849 }
850
851 vpriv->old_pop(vcc, skb);
852
853 if (vpriv->xoff && atm_may_send(vcc, 0)) {
854 vpriv->xoff = 0;
855 if (netif_running(dev) && netif_queue_stopped(dev))
856 netif_wake_queue(dev);
857 }
858 }
859
860 static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg)
861 {
862 struct lec_vcc_priv *vpriv;
863 int bytes_left;
864 struct atmlec_ioc ioc_data;
865
866 /* Lecd must be up in this case */
867 bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc));
868 if (bytes_left != 0) {
869 printk
870 ("lec: lec_vcc_attach, copy from user failed for %d bytes\n",
871 bytes_left);
872 }
873 if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF ||
874 !dev_lec[ioc_data.dev_num])
875 return -EINVAL;
876 if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL)))
877 return -ENOMEM;
878 vpriv->xoff = 0;
879 vpriv->old_pop = vcc->pop;
880 vcc->user_back = vpriv;
881 vcc->pop = lec_pop;
882 lec_vcc_added(dev_lec[ioc_data.dev_num]->priv,
883 &ioc_data, vcc, vcc->push);
884 vcc->proto_data = dev_lec[ioc_data.dev_num];
885 vcc->push = lec_push;
886 return 0;
887 }
888
889 static int lec_mcast_attach(struct atm_vcc *vcc, int arg)
890 {
891 if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg])
892 return -EINVAL;
893 vcc->proto_data = dev_lec[arg];
894 return (lec_mcast_make((struct lec_priv *)dev_lec[arg]->priv, vcc));
895 }
896
897 /* Initialize device. */
898 static int lecd_attach(struct atm_vcc *vcc, int arg)
899 {
900 int i;
901 struct lec_priv *priv;
902
903 if (arg < 0)
904 i = 0;
905 else
906 i = arg;
907 #ifdef CONFIG_TR
908 if (arg >= MAX_LEC_ITF)
909 return -EINVAL;
910 #else /* Reserve the top NUM_TR_DEVS for TR */
911 if (arg >= (MAX_LEC_ITF - NUM_TR_DEVS))
912 return -EINVAL;
913 #endif
914 if (!dev_lec[i]) {
915 int is_trdev, size;
916
917 is_trdev = 0;
918 if (i >= (MAX_LEC_ITF - NUM_TR_DEVS))
919 is_trdev = 1;
920
921 size = sizeof(struct lec_priv);
922 #ifdef CONFIG_TR
923 if (is_trdev)
924 dev_lec[i] = alloc_trdev(size);
925 else
926 #endif
927 dev_lec[i] = alloc_etherdev(size);
928 if (!dev_lec[i])
929 return -ENOMEM;
930 snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i);
931 if (register_netdev(dev_lec[i])) {
932 free_netdev(dev_lec[i]);
933 return -EINVAL;
934 }
935
936 priv = dev_lec[i]->priv;
937 priv->is_trdev = is_trdev;
938 lec_init(dev_lec[i]);
939 } else {
940 priv = dev_lec[i]->priv;
941 if (priv->lecd)
942 return -EADDRINUSE;
943 }
944 lec_arp_init(priv);
945 priv->itfnum = i; /* LANE2 addition */
946 priv->lecd = vcc;
947 vcc->dev = &lecatm_dev;
948 vcc_insert_socket(sk_atm(vcc));
949
950 vcc->proto_data = dev_lec[i];
951 set_bit(ATM_VF_META, &vcc->flags);
952 set_bit(ATM_VF_READY, &vcc->flags);
953
954 /* Set default values to these variables */
955 priv->maximum_unknown_frame_count = 1;
956 priv->max_unknown_frame_time = (1 * HZ);
957 priv->vcc_timeout_period = (1200 * HZ);
958 priv->max_retry_count = 1;
959 priv->aging_time = (300 * HZ);
960 priv->forward_delay_time = (15 * HZ);
961 priv->topology_change = 0;
962 priv->arp_response_time = (1 * HZ);
963 priv->flush_timeout = (4 * HZ);
964 priv->path_switching_delay = (6 * HZ);
965
966 if (dev_lec[i]->flags & IFF_UP) {
967 netif_start_queue(dev_lec[i]);
968 }
969 __module_get(THIS_MODULE);
970 return i;
971 }
972
973 #ifdef CONFIG_PROC_FS
974 static char *lec_arp_get_status_string(unsigned char status)
975 {
976 static char *lec_arp_status_string[] = {
977 "ESI_UNKNOWN ",
978 "ESI_ARP_PENDING ",
979 "ESI_VC_PENDING ",
980 "<Undefined> ",
981 "ESI_FLUSH_PENDING ",
982 "ESI_FORWARD_DIRECT"
983 };
984
985 if (status > ESI_FORWARD_DIRECT)
986 status = 3; /* ESI_UNDEFINED */
987 return lec_arp_status_string[status];
988 }
989
990 static void lec_info(struct seq_file *seq, struct lec_arp_table *entry)
991 {
992 int i;
993
994 for (i = 0; i < ETH_ALEN; i++)
995 seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff);
996 seq_printf(seq, " ");
997 for (i = 0; i < ATM_ESA_LEN; i++)
998 seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff);
999 seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status),
1000 entry->flags & 0xffff);
1001 if (entry->vcc)
1002 seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci);
1003 else
1004 seq_printf(seq, " ");
1005 if (entry->recv_vcc) {
1006 seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi,
1007 entry->recv_vcc->vci);
1008 }
1009 seq_putc(seq, '\n');
1010 }
1011
1012 struct lec_state {
1013 unsigned long flags;
1014 struct lec_priv *locked;
1015 struct hlist_node *node;
1016 struct net_device *dev;
1017 int itf;
1018 int arp_table;
1019 int misc_table;
1020 };
1021
1022 static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl,
1023 loff_t *l)
1024 {
1025 struct hlist_node *e = state->node;
1026 struct lec_arp_table *tmp;
1027
1028 if (!e)
1029 e = tbl->first;
1030 if (e == (void *)1) {
1031 e = tbl->first;
1032 --*l;
1033 }
1034
1035 hlist_for_each_entry_from(tmp, e, next) {
1036 if (--*l < 0)
1037 break;
1038 }
1039 state->node = e;
1040
1041 return (*l < 0) ? state : NULL;
1042 }
1043
1044 static void *lec_arp_walk(struct lec_state *state, loff_t *l,
1045 struct lec_priv *priv)
1046 {
1047 void *v = NULL;
1048 int p;
1049
1050 for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) {
1051 v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l);
1052 if (v)
1053 break;
1054 }
1055 state->arp_table = p;
1056 return v;
1057 }
1058
1059 static void *lec_misc_walk(struct lec_state *state, loff_t *l,
1060 struct lec_priv *priv)
1061 {
1062 struct hlist_head *lec_misc_tables[] = {
1063 &priv->lec_arp_empty_ones,
1064 &priv->lec_no_forward,
1065 &priv->mcast_fwds
1066 };
1067 void *v = NULL;
1068 int q;
1069
1070 for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) {
1071 v = lec_tbl_walk(state, lec_misc_tables[q], l);
1072 if (v)
1073 break;
1074 }
1075 state->misc_table = q;
1076 return v;
1077 }
1078
1079 static void *lec_priv_walk(struct lec_state *state, loff_t *l,
1080 struct lec_priv *priv)
1081 {
1082 if (!state->locked) {
1083 state->locked = priv;
1084 spin_lock_irqsave(&priv->lec_arp_lock, state->flags);
1085 }
1086 if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) {
1087 spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags);
1088 state->locked = NULL;
1089 /* Partial state reset for the next time we get called */
1090 state->arp_table = state->misc_table = 0;
1091 }
1092 return state->locked;
1093 }
1094
1095 static void *lec_itf_walk(struct lec_state *state, loff_t *l)
1096 {
1097 struct net_device *dev;
1098 void *v;
1099
1100 dev = state->dev ? state->dev : dev_lec[state->itf];
1101 v = (dev && dev->priv) ? lec_priv_walk(state, l, dev->priv) : NULL;
1102 if (!v && dev) {
1103 dev_put(dev);
1104 /* Partial state reset for the next time we get called */
1105 dev = NULL;
1106 }
1107 state->dev = dev;
1108 return v;
1109 }
1110
1111 static void *lec_get_idx(struct lec_state *state, loff_t l)
1112 {
1113 void *v = NULL;
1114
1115 for (; state->itf < MAX_LEC_ITF; state->itf++) {
1116 v = lec_itf_walk(state, &l);
1117 if (v)
1118 break;
1119 }
1120 return v;
1121 }
1122
1123 static void *lec_seq_start(struct seq_file *seq, loff_t *pos)
1124 {
1125 struct lec_state *state = seq->private;
1126
1127 state->itf = 0;
1128 state->dev = NULL;
1129 state->locked = NULL;
1130 state->arp_table = 0;
1131 state->misc_table = 0;
1132 state->node = (void *)1;
1133
1134 return *pos ? lec_get_idx(state, *pos) : (void *)1;
1135 }
1136
1137 static void lec_seq_stop(struct seq_file *seq, void *v)
1138 {
1139 struct lec_state *state = seq->private;
1140
1141 if (state->dev) {
1142 spin_unlock_irqrestore(&state->locked->lec_arp_lock,
1143 state->flags);
1144 dev_put(state->dev);
1145 }
1146 }
1147
1148 static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1149 {
1150 struct lec_state *state = seq->private;
1151
1152 v = lec_get_idx(state, 1);
1153 *pos += !!PTR_ERR(v);
1154 return v;
1155 }
1156
1157 static int lec_seq_show(struct seq_file *seq, void *v)
1158 {
1159 static char lec_banner[] = "Itf MAC ATM destination"
1160 " Status Flags "
1161 "VPI/VCI Recv VPI/VCI\n";
1162
1163 if (v == (void *)1)
1164 seq_puts(seq, lec_banner);
1165 else {
1166 struct lec_state *state = seq->private;
1167 struct net_device *dev = state->dev;
1168 struct lec_arp_table *entry = hlist_entry(state->node, struct lec_arp_table, next);
1169
1170 seq_printf(seq, "%s ", dev->name);
1171 lec_info(seq, entry);
1172 }
1173 return 0;
1174 }
1175
1176 static const struct seq_operations lec_seq_ops = {
1177 .start = lec_seq_start,
1178 .next = lec_seq_next,
1179 .stop = lec_seq_stop,
1180 .show = lec_seq_show,
1181 };
1182
1183 static int lec_seq_open(struct inode *inode, struct file *file)
1184 {
1185 struct lec_state *state;
1186 struct seq_file *seq;
1187 int rc = -EAGAIN;
1188
1189 state = kmalloc(sizeof(*state), GFP_KERNEL);
1190 if (!state) {
1191 rc = -ENOMEM;
1192 goto out;
1193 }
1194
1195 rc = seq_open(file, &lec_seq_ops);
1196 if (rc)
1197 goto out_kfree;
1198 seq = file->private_data;
1199 seq->private = state;
1200 out:
1201 return rc;
1202
1203 out_kfree:
1204 kfree(state);
1205 goto out;
1206 }
1207
1208 static int lec_seq_release(struct inode *inode, struct file *file)
1209 {
1210 return seq_release_private(inode, file);
1211 }
1212
1213 static const struct file_operations lec_seq_fops = {
1214 .owner = THIS_MODULE,
1215 .open = lec_seq_open,
1216 .read = seq_read,
1217 .llseek = seq_lseek,
1218 .release = lec_seq_release,
1219 };
1220 #endif
1221
1222 static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1223 {
1224 struct atm_vcc *vcc = ATM_SD(sock);
1225 int err = 0;
1226
1227 switch (cmd) {
1228 case ATMLEC_CTRL:
1229 case ATMLEC_MCAST:
1230 case ATMLEC_DATA:
1231 if (!capable(CAP_NET_ADMIN))
1232 return -EPERM;
1233 break;
1234 default:
1235 return -ENOIOCTLCMD;
1236 }
1237
1238 switch (cmd) {
1239 case ATMLEC_CTRL:
1240 err = lecd_attach(vcc, (int)arg);
1241 if (err >= 0)
1242 sock->state = SS_CONNECTED;
1243 break;
1244 case ATMLEC_MCAST:
1245 err = lec_mcast_attach(vcc, (int)arg);
1246 break;
1247 case ATMLEC_DATA:
1248 err = lec_vcc_attach(vcc, (void __user *)arg);
1249 break;
1250 }
1251
1252 return err;
1253 }
1254
1255 static struct atm_ioctl lane_ioctl_ops = {
1256 .owner = THIS_MODULE,
1257 .ioctl = lane_ioctl,
1258 };
1259
1260 static int __init lane_module_init(void)
1261 {
1262 #ifdef CONFIG_PROC_FS
1263 struct proc_dir_entry *p;
1264
1265 p = create_proc_entry("lec", S_IRUGO, atm_proc_root);
1266 if (p)
1267 p->proc_fops = &lec_seq_fops;
1268 #endif
1269
1270 register_atm_ioctl(&lane_ioctl_ops);
1271 printk("lec.c: " __DATE__ " " __TIME__ " initialized\n");
1272 return 0;
1273 }
1274
1275 static void __exit lane_module_cleanup(void)
1276 {
1277 int i;
1278 struct lec_priv *priv;
1279
1280 remove_proc_entry("lec", atm_proc_root);
1281
1282 deregister_atm_ioctl(&lane_ioctl_ops);
1283
1284 for (i = 0; i < MAX_LEC_ITF; i++) {
1285 if (dev_lec[i] != NULL) {
1286 priv = (struct lec_priv *)dev_lec[i]->priv;
1287 unregister_netdev(dev_lec[i]);
1288 free_netdev(dev_lec[i]);
1289 dev_lec[i] = NULL;
1290 }
1291 }
1292
1293 return;
1294 }
1295
1296 module_init(lane_module_init);
1297 module_exit(lane_module_cleanup);
1298
1299 /*
1300 * LANE2: 3.1.3, LE_RESOLVE.request
1301 * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs.
1302 * If sizeoftlvs == NULL the default TLVs associated with with this
1303 * lec will be used.
1304 * If dst_mac == NULL, targetless LE_ARP will be sent
1305 */
1306 static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force,
1307 u8 **tlvs, u32 *sizeoftlvs)
1308 {
1309 unsigned long flags;
1310 struct lec_priv *priv = (struct lec_priv *)dev->priv;
1311 struct lec_arp_table *table;
1312 struct sk_buff *skb;
1313 int retval;
1314
1315 if (force == 0) {
1316 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1317 table = lec_arp_find(priv, dst_mac);
1318 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1319 if (table == NULL)
1320 return -1;
1321
1322 *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC);
1323 if (*tlvs == NULL)
1324 return -1;
1325
1326 *sizeoftlvs = table->sizeoftlvs;
1327
1328 return 0;
1329 }
1330
1331 if (sizeoftlvs == NULL)
1332 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL);
1333
1334 else {
1335 skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC);
1336 if (skb == NULL)
1337 return -1;
1338 skb->len = *sizeoftlvs;
1339 skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs);
1340 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb);
1341 }
1342 return retval;
1343 }
1344
1345 /*
1346 * LANE2: 3.1.4, LE_ASSOCIATE.request
1347 * Associate the *tlvs with the *lan_dst address.
1348 * Will overwrite any previous association
1349 * Returns 1 for success, 0 for failure (out of memory)
1350 *
1351 */
1352 static int lane2_associate_req(struct net_device *dev, u8 *lan_dst,
1353 u8 *tlvs, u32 sizeoftlvs)
1354 {
1355 int retval;
1356 struct sk_buff *skb;
1357 struct lec_priv *priv = (struct lec_priv *)dev->priv;
1358
1359 if (compare_ether_addr(lan_dst, dev->dev_addr))
1360 return (0); /* not our mac address */
1361
1362 kfree(priv->tlvs); /* NULL if there was no previous association */
1363
1364 priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1365 if (priv->tlvs == NULL)
1366 return (0);
1367 priv->sizeoftlvs = sizeoftlvs;
1368
1369 skb = alloc_skb(sizeoftlvs, GFP_ATOMIC);
1370 if (skb == NULL)
1371 return 0;
1372 skb->len = sizeoftlvs;
1373 skb_copy_to_linear_data(skb, tlvs, sizeoftlvs);
1374 retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb);
1375 if (retval != 0)
1376 printk("lec.c: lane2_associate_req() failed\n");
1377 /*
1378 * If the previous association has changed we must
1379 * somehow notify other LANE entities about the change
1380 */
1381 return (1);
1382 }
1383
1384 /*
1385 * LANE2: 3.1.5, LE_ASSOCIATE.indication
1386 *
1387 */
1388 static void lane2_associate_ind(struct net_device *dev, u8 *mac_addr,
1389 u8 *tlvs, u32 sizeoftlvs)
1390 {
1391 #if 0
1392 int i = 0;
1393 #endif
1394 struct lec_priv *priv = (struct lec_priv *)dev->priv;
1395 #if 0 /*
1396 * Why have the TLVs in LE_ARP entries
1397 * since we do not use them? When you
1398 * uncomment this code, make sure the
1399 * TLVs get freed when entry is killed
1400 */
1401 struct lec_arp_table *entry = lec_arp_find(priv, mac_addr);
1402
1403 if (entry == NULL)
1404 return; /* should not happen */
1405
1406 kfree(entry->tlvs);
1407
1408 entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1409 if (entry->tlvs == NULL)
1410 return;
1411 entry->sizeoftlvs = sizeoftlvs;
1412 #endif
1413 #if 0
1414 printk("lec.c: lane2_associate_ind()\n");
1415 printk("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs);
1416 while (i < sizeoftlvs)
1417 printk("%02x ", tlvs[i++]);
1418
1419 printk("\n");
1420 #endif
1421
1422 /* tell MPOA about the TLVs we saw */
1423 if (priv->lane2_ops && priv->lane2_ops->associate_indicator) {
1424 priv->lane2_ops->associate_indicator(dev, mac_addr,
1425 tlvs, sizeoftlvs);
1426 }
1427 return;
1428 }
1429
1430 /*
1431 * Here starts what used to lec_arpc.c
1432 *
1433 * lec_arpc.c was added here when making
1434 * lane client modular. October 1997
1435 */
1436
1437 #include <linux/types.h>
1438 #include <linux/timer.h>
1439 #include <asm/param.h>
1440 #include <asm/atomic.h>
1441 #include <linux/inetdevice.h>
1442 #include <net/route.h>
1443
1444 #if 0
1445 #define DPRINTK(format,args...)
1446 /*
1447 #define DPRINTK printk
1448 */
1449 #endif
1450 #define DEBUG_ARP_TABLE 0
1451
1452 #define LEC_ARP_REFRESH_INTERVAL (3*HZ)
1453
1454 static void lec_arp_check_expire(struct work_struct *work);
1455 static void lec_arp_expire_arp(unsigned long data);
1456
1457 /*
1458 * Arp table funcs
1459 */
1460
1461 #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE -1))
1462
1463 /*
1464 * Initialization of arp-cache
1465 */
1466 static void lec_arp_init(struct lec_priv *priv)
1467 {
1468 unsigned short i;
1469
1470 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1471 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1472 }
1473 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1474 INIT_HLIST_HEAD(&priv->lec_no_forward);
1475 INIT_HLIST_HEAD(&priv->mcast_fwds);
1476 spin_lock_init(&priv->lec_arp_lock);
1477 INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire);
1478 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1479 }
1480
1481 static void lec_arp_clear_vccs(struct lec_arp_table *entry)
1482 {
1483 if (entry->vcc) {
1484 struct atm_vcc *vcc = entry->vcc;
1485 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
1486 struct net_device *dev = (struct net_device *)vcc->proto_data;
1487
1488 vcc->pop = vpriv->old_pop;
1489 if (vpriv->xoff)
1490 netif_wake_queue(dev);
1491 kfree(vpriv);
1492 vcc->user_back = NULL;
1493 vcc->push = entry->old_push;
1494 vcc_release_async(vcc, -EPIPE);
1495 entry->vcc = NULL;
1496 }
1497 if (entry->recv_vcc) {
1498 entry->recv_vcc->push = entry->old_recv_push;
1499 vcc_release_async(entry->recv_vcc, -EPIPE);
1500 entry->recv_vcc = NULL;
1501 }
1502 }
1503
1504 /*
1505 * Insert entry to lec_arp_table
1506 * LANE2: Add to the end of the list to satisfy 8.1.13
1507 */
1508 static inline void
1509 lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry)
1510 {
1511 struct hlist_head *tmp;
1512
1513 tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])];
1514 hlist_add_head(&entry->next, tmp);
1515
1516 DPRINTK("LEC_ARP: Added entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1517 0xff & entry->mac_addr[0], 0xff & entry->mac_addr[1],
1518 0xff & entry->mac_addr[2], 0xff & entry->mac_addr[3],
1519 0xff & entry->mac_addr[4], 0xff & entry->mac_addr[5]);
1520 }
1521
1522 /*
1523 * Remove entry from lec_arp_table
1524 */
1525 static int
1526 lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove)
1527 {
1528 struct hlist_node *node;
1529 struct lec_arp_table *entry;
1530 int i, remove_vcc = 1;
1531
1532 if (!to_remove) {
1533 return -1;
1534 }
1535
1536 hlist_del(&to_remove->next);
1537 del_timer(&to_remove->timer);
1538
1539 /* If this is the only MAC connected to this VCC, also tear down the VCC */
1540 if (to_remove->status >= ESI_FLUSH_PENDING) {
1541 /*
1542 * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT
1543 */
1544 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1545 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
1546 if (memcmp(to_remove->atm_addr,
1547 entry->atm_addr, ATM_ESA_LEN) == 0) {
1548 remove_vcc = 0;
1549 break;
1550 }
1551 }
1552 }
1553 if (remove_vcc)
1554 lec_arp_clear_vccs(to_remove);
1555 }
1556 skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */
1557
1558 DPRINTK("LEC_ARP: Removed entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1559 0xff & to_remove->mac_addr[0], 0xff & to_remove->mac_addr[1],
1560 0xff & to_remove->mac_addr[2], 0xff & to_remove->mac_addr[3],
1561 0xff & to_remove->mac_addr[4], 0xff & to_remove->mac_addr[5]);
1562 return 0;
1563 }
1564
1565 #if DEBUG_ARP_TABLE
1566 static char *get_status_string(unsigned char st)
1567 {
1568 switch (st) {
1569 case ESI_UNKNOWN:
1570 return "ESI_UNKNOWN";
1571 case ESI_ARP_PENDING:
1572 return "ESI_ARP_PENDING";
1573 case ESI_VC_PENDING:
1574 return "ESI_VC_PENDING";
1575 case ESI_FLUSH_PENDING:
1576 return "ESI_FLUSH_PENDING";
1577 case ESI_FORWARD_DIRECT:
1578 return "ESI_FORWARD_DIRECT";
1579 default:
1580 return "<UNKNOWN>";
1581 }
1582 }
1583
1584 static void dump_arp_table(struct lec_priv *priv)
1585 {
1586 struct hlist_node *node;
1587 struct lec_arp_table *rulla;
1588 char buf[256];
1589 int i, j, offset;
1590
1591 printk("Dump %p:\n", priv);
1592 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1593 hlist_for_each_entry(rulla, node, &priv->lec_arp_tables[i], next) {
1594 offset = 0;
1595 offset += sprintf(buf, "%d: %p\n", i, rulla);
1596 offset += sprintf(buf + offset, "Mac:");
1597 for (j = 0; j < ETH_ALEN; j++) {
1598 offset += sprintf(buf + offset,
1599 "%2.2x ",
1600 rulla->mac_addr[j] & 0xff);
1601 }
1602 offset += sprintf(buf + offset, "Atm:");
1603 for (j = 0; j < ATM_ESA_LEN; j++) {
1604 offset += sprintf(buf + offset,
1605 "%2.2x ",
1606 rulla->atm_addr[j] & 0xff);
1607 }
1608 offset += sprintf(buf + offset,
1609 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1610 rulla->vcc ? rulla->vcc->vpi : 0,
1611 rulla->vcc ? rulla->vcc->vci : 0,
1612 rulla->recv_vcc ? rulla->recv_vcc->
1613 vpi : 0,
1614 rulla->recv_vcc ? rulla->recv_vcc->
1615 vci : 0, rulla->last_used,
1616 rulla->timestamp, rulla->no_tries);
1617 offset +=
1618 sprintf(buf + offset,
1619 "Flags:%x, Packets_flooded:%x, Status: %s ",
1620 rulla->flags, rulla->packets_flooded,
1621 get_status_string(rulla->status));
1622 printk("%s\n", buf);
1623 }
1624 }
1625
1626 if (!hlist_empty(&priv->lec_no_forward))
1627 printk("No forward\n");
1628 hlist_for_each_entry(rulla, node, &priv->lec_no_forward, next) {
1629 offset = 0;
1630 offset += sprintf(buf + offset, "Mac:");
1631 for (j = 0; j < ETH_ALEN; j++) {
1632 offset += sprintf(buf + offset, "%2.2x ",
1633 rulla->mac_addr[j] & 0xff);
1634 }
1635 offset += sprintf(buf + offset, "Atm:");
1636 for (j = 0; j < ATM_ESA_LEN; j++) {
1637 offset += sprintf(buf + offset, "%2.2x ",
1638 rulla->atm_addr[j] & 0xff);
1639 }
1640 offset += sprintf(buf + offset,
1641 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1642 rulla->vcc ? rulla->vcc->vpi : 0,
1643 rulla->vcc ? rulla->vcc->vci : 0,
1644 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1645 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1646 rulla->last_used,
1647 rulla->timestamp, rulla->no_tries);
1648 offset += sprintf(buf + offset,
1649 "Flags:%x, Packets_flooded:%x, Status: %s ",
1650 rulla->flags, rulla->packets_flooded,
1651 get_status_string(rulla->status));
1652 printk("%s\n", buf);
1653 }
1654
1655 if (!hlist_empty(&priv->lec_arp_empty_ones))
1656 printk("Empty ones\n");
1657 hlist_for_each_entry(rulla, node, &priv->lec_arp_empty_ones, next) {
1658 offset = 0;
1659 offset += sprintf(buf + offset, "Mac:");
1660 for (j = 0; j < ETH_ALEN; j++) {
1661 offset += sprintf(buf + offset, "%2.2x ",
1662 rulla->mac_addr[j] & 0xff);
1663 }
1664 offset += sprintf(buf + offset, "Atm:");
1665 for (j = 0; j < ATM_ESA_LEN; j++) {
1666 offset += sprintf(buf + offset, "%2.2x ",
1667 rulla->atm_addr[j] & 0xff);
1668 }
1669 offset += sprintf(buf + offset,
1670 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1671 rulla->vcc ? rulla->vcc->vpi : 0,
1672 rulla->vcc ? rulla->vcc->vci : 0,
1673 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1674 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1675 rulla->last_used,
1676 rulla->timestamp, rulla->no_tries);
1677 offset += sprintf(buf + offset,
1678 "Flags:%x, Packets_flooded:%x, Status: %s ",
1679 rulla->flags, rulla->packets_flooded,
1680 get_status_string(rulla->status));
1681 printk("%s", buf);
1682 }
1683
1684 if (!hlist_empty(&priv->mcast_fwds))
1685 printk("Multicast Forward VCCs\n");
1686 hlist_for_each_entry(rulla, node, &priv->mcast_fwds, next) {
1687 offset = 0;
1688 offset += sprintf(buf + offset, "Mac:");
1689 for (j = 0; j < ETH_ALEN; j++) {
1690 offset += sprintf(buf + offset, "%2.2x ",
1691 rulla->mac_addr[j] & 0xff);
1692 }
1693 offset += sprintf(buf + offset, "Atm:");
1694 for (j = 0; j < ATM_ESA_LEN; j++) {
1695 offset += sprintf(buf + offset, "%2.2x ",
1696 rulla->atm_addr[j] & 0xff);
1697 }
1698 offset += sprintf(buf + offset,
1699 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1700 rulla->vcc ? rulla->vcc->vpi : 0,
1701 rulla->vcc ? rulla->vcc->vci : 0,
1702 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1703 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1704 rulla->last_used,
1705 rulla->timestamp, rulla->no_tries);
1706 offset += sprintf(buf + offset,
1707 "Flags:%x, Packets_flooded:%x, Status: %s ",
1708 rulla->flags, rulla->packets_flooded,
1709 get_status_string(rulla->status));
1710 printk("%s\n", buf);
1711 }
1712
1713 }
1714 #else
1715 #define dump_arp_table(priv) do { } while (0)
1716 #endif
1717
1718 /*
1719 * Destruction of arp-cache
1720 */
1721 static void lec_arp_destroy(struct lec_priv *priv)
1722 {
1723 unsigned long flags;
1724 struct hlist_node *node, *next;
1725 struct lec_arp_table *entry;
1726 int i;
1727
1728 cancel_rearming_delayed_work(&priv->lec_arp_work);
1729
1730 /*
1731 * Remove all entries
1732 */
1733
1734 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1735 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1736 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
1737 lec_arp_remove(priv, entry);
1738 lec_arp_put(entry);
1739 }
1740 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1741 }
1742
1743 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
1744 del_timer_sync(&entry->timer);
1745 lec_arp_clear_vccs(entry);
1746 hlist_del(&entry->next);
1747 lec_arp_put(entry);
1748 }
1749 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1750
1751 hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) {
1752 del_timer_sync(&entry->timer);
1753 lec_arp_clear_vccs(entry);
1754 hlist_del(&entry->next);
1755 lec_arp_put(entry);
1756 }
1757 INIT_HLIST_HEAD(&priv->lec_no_forward);
1758
1759 hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) {
1760 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
1761 lec_arp_clear_vccs(entry);
1762 hlist_del(&entry->next);
1763 lec_arp_put(entry);
1764 }
1765 INIT_HLIST_HEAD(&priv->mcast_fwds);
1766 priv->mcast_vcc = NULL;
1767 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1768 }
1769
1770 /*
1771 * Find entry by mac_address
1772 */
1773 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
1774 unsigned char *mac_addr)
1775 {
1776 struct hlist_node *node;
1777 struct hlist_head *head;
1778 struct lec_arp_table *entry;
1779
1780 DPRINTK("LEC_ARP: lec_arp_find :%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1781 mac_addr[0] & 0xff, mac_addr[1] & 0xff, mac_addr[2] & 0xff,
1782 mac_addr[3] & 0xff, mac_addr[4] & 0xff, mac_addr[5] & 0xff);
1783
1784 head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])];
1785 hlist_for_each_entry(entry, node, head, next) {
1786 if (!compare_ether_addr(mac_addr, entry->mac_addr)) {
1787 return entry;
1788 }
1789 }
1790 return NULL;
1791 }
1792
1793 static struct lec_arp_table *make_entry(struct lec_priv *priv,
1794 unsigned char *mac_addr)
1795 {
1796 struct lec_arp_table *to_return;
1797
1798 to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC);
1799 if (!to_return) {
1800 printk("LEC: Arp entry kmalloc failed\n");
1801 return NULL;
1802 }
1803 memcpy(to_return->mac_addr, mac_addr, ETH_ALEN);
1804 INIT_HLIST_NODE(&to_return->next);
1805 init_timer(&to_return->timer);
1806 to_return->timer.function = lec_arp_expire_arp;
1807 to_return->timer.data = (unsigned long)to_return;
1808 to_return->last_used = jiffies;
1809 to_return->priv = priv;
1810 skb_queue_head_init(&to_return->tx_wait);
1811 atomic_set(&to_return->usage, 1);
1812 return to_return;
1813 }
1814
1815 /* Arp sent timer expired */
1816 static void lec_arp_expire_arp(unsigned long data)
1817 {
1818 struct lec_arp_table *entry;
1819
1820 entry = (struct lec_arp_table *)data;
1821
1822 DPRINTK("lec_arp_expire_arp\n");
1823 if (entry->status == ESI_ARP_PENDING) {
1824 if (entry->no_tries <= entry->priv->max_retry_count) {
1825 if (entry->is_rdesc)
1826 send_to_lecd(entry->priv, l_rdesc_arp_xmt,
1827 entry->mac_addr, NULL, NULL);
1828 else
1829 send_to_lecd(entry->priv, l_arp_xmt,
1830 entry->mac_addr, NULL, NULL);
1831 entry->no_tries++;
1832 }
1833 mod_timer(&entry->timer, jiffies + (1 * HZ));
1834 }
1835 }
1836
1837 /* Unknown/unused vcc expire, remove associated entry */
1838 static void lec_arp_expire_vcc(unsigned long data)
1839 {
1840 unsigned long flags;
1841 struct lec_arp_table *to_remove = (struct lec_arp_table *)data;
1842 struct lec_priv *priv = (struct lec_priv *)to_remove->priv;
1843
1844 del_timer(&to_remove->timer);
1845
1846 DPRINTK("LEC_ARP %p %p: lec_arp_expire_vcc vpi:%d vci:%d\n",
1847 to_remove, priv,
1848 to_remove->vcc ? to_remove->recv_vcc->vpi : 0,
1849 to_remove->vcc ? to_remove->recv_vcc->vci : 0);
1850
1851 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1852 hlist_del(&to_remove->next);
1853 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1854
1855 lec_arp_clear_vccs(to_remove);
1856 lec_arp_put(to_remove);
1857 }
1858
1859 /*
1860 * Expire entries.
1861 * 1. Re-set timer
1862 * 2. For each entry, delete entries that have aged past the age limit.
1863 * 3. For each entry, depending on the status of the entry, perform
1864 * the following maintenance.
1865 * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the
1866 * tick_count is above the max_unknown_frame_time, clear
1867 * the tick_count to zero and clear the packets_flooded counter
1868 * to zero. This supports the packet rate limit per address
1869 * while flooding unknowns.
1870 * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater
1871 * than or equal to the path_switching_delay, change the status
1872 * to ESI_FORWARD_DIRECT. This causes the flush period to end
1873 * regardless of the progress of the flush protocol.
1874 */
1875 static void lec_arp_check_expire(struct work_struct *work)
1876 {
1877 unsigned long flags;
1878 struct lec_priv *priv =
1879 container_of(work, struct lec_priv, lec_arp_work.work);
1880 struct hlist_node *node, *next;
1881 struct lec_arp_table *entry;
1882 unsigned long now;
1883 unsigned long time_to_check;
1884 int i;
1885
1886 DPRINTK("lec_arp_check_expire %p\n", priv);
1887 now = jiffies;
1888 restart:
1889 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1890 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1891 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
1892 if ((entry->flags) & LEC_REMOTE_FLAG &&
1893 priv->topology_change)
1894 time_to_check = priv->forward_delay_time;
1895 else
1896 time_to_check = priv->aging_time;
1897
1898 DPRINTK("About to expire: %lx - %lx > %lx\n",
1899 now, entry->last_used, time_to_check);
1900 if (time_after(now, entry->last_used + time_to_check)
1901 && !(entry->flags & LEC_PERMANENT_FLAG)
1902 && !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */
1903 /* Remove entry */
1904 DPRINTK("LEC:Entry timed out\n");
1905 lec_arp_remove(priv, entry);
1906 lec_arp_put(entry);
1907 } else {
1908 /* Something else */
1909 if ((entry->status == ESI_VC_PENDING ||
1910 entry->status == ESI_ARP_PENDING)
1911 && time_after_eq(now,
1912 entry->timestamp +
1913 priv->
1914 max_unknown_frame_time)) {
1915 entry->timestamp = jiffies;
1916 entry->packets_flooded = 0;
1917 if (entry->status == ESI_VC_PENDING)
1918 send_to_lecd(priv, l_svc_setup,
1919 entry->mac_addr,
1920 entry->atm_addr,
1921 NULL);
1922 }
1923 if (entry->status == ESI_FLUSH_PENDING
1924 &&
1925 time_after_eq(now, entry->timestamp +
1926 priv->path_switching_delay)) {
1927 struct sk_buff *skb;
1928 struct atm_vcc *vcc = entry->vcc;
1929
1930 lec_arp_hold(entry);
1931 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1932 while ((skb = skb_dequeue(&entry->tx_wait)) != NULL)
1933 lec_send(vcc, skb, entry->priv);
1934 entry->last_used = jiffies;
1935 entry->status = ESI_FORWARD_DIRECT;
1936 lec_arp_put(entry);
1937 goto restart;
1938 }
1939 }
1940 }
1941 }
1942 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1943
1944 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1945 }
1946
1947 /*
1948 * Try to find vcc where mac_address is attached.
1949 *
1950 */
1951 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
1952 unsigned char *mac_to_find, int is_rdesc,
1953 struct lec_arp_table **ret_entry)
1954 {
1955 unsigned long flags;
1956 struct lec_arp_table *entry;
1957 struct atm_vcc *found;
1958
1959 if (mac_to_find[0] & 0x01) {
1960 switch (priv->lane_version) {
1961 case 1:
1962 return priv->mcast_vcc;
1963 break;
1964 case 2: /* LANE2 wants arp for multicast addresses */
1965 if (!compare_ether_addr(mac_to_find, bus_mac))
1966 return priv->mcast_vcc;
1967 break;
1968 default:
1969 break;
1970 }
1971 }
1972
1973 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1974 entry = lec_arp_find(priv, mac_to_find);
1975
1976 if (entry) {
1977 if (entry->status == ESI_FORWARD_DIRECT) {
1978 /* Connection Ok */
1979 entry->last_used = jiffies;
1980 lec_arp_hold(entry);
1981 *ret_entry = entry;
1982 found = entry->vcc;
1983 goto out;
1984 }
1985 /*
1986 * If the LE_ARP cache entry is still pending, reset count to 0
1987 * so another LE_ARP request can be made for this frame.
1988 */
1989 if (entry->status == ESI_ARP_PENDING) {
1990 entry->no_tries = 0;
1991 }
1992 /*
1993 * Data direct VC not yet set up, check to see if the unknown
1994 * frame count is greater than the limit. If the limit has
1995 * not been reached, allow the caller to send packet to
1996 * BUS.
1997 */
1998 if (entry->status != ESI_FLUSH_PENDING &&
1999 entry->packets_flooded <
2000 priv->maximum_unknown_frame_count) {
2001 entry->packets_flooded++;
2002 DPRINTK("LEC_ARP: Flooding..\n");
2003 found = priv->mcast_vcc;
2004 goto out;
2005 }
2006 /*
2007 * We got here because entry->status == ESI_FLUSH_PENDING
2008 * or BUS flood limit was reached for an entry which is
2009 * in ESI_ARP_PENDING or ESI_VC_PENDING state.
2010 */
2011 lec_arp_hold(entry);
2012 *ret_entry = entry;
2013 DPRINTK("lec: entry->status %d entry->vcc %p\n", entry->status,
2014 entry->vcc);
2015 found = NULL;
2016 } else {
2017 /* No matching entry was found */
2018 entry = make_entry(priv, mac_to_find);
2019 DPRINTK("LEC_ARP: Making entry\n");
2020 if (!entry) {
2021 found = priv->mcast_vcc;
2022 goto out;
2023 }
2024 lec_arp_add(priv, entry);
2025 /* We want arp-request(s) to be sent */
2026 entry->packets_flooded = 1;
2027 entry->status = ESI_ARP_PENDING;
2028 entry->no_tries = 1;
2029 entry->last_used = entry->timestamp = jiffies;
2030 entry->is_rdesc = is_rdesc;
2031 if (entry->is_rdesc)
2032 send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL,
2033 NULL);
2034 else
2035 send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL);
2036 entry->timer.expires = jiffies + (1 * HZ);
2037 entry->timer.function = lec_arp_expire_arp;
2038 add_timer(&entry->timer);
2039 found = priv->mcast_vcc;
2040 }
2041
2042 out:
2043 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2044 return found;
2045 }
2046
2047 static int
2048 lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr,
2049 unsigned long permanent)
2050 {
2051 unsigned long flags;
2052 struct hlist_node *node, *next;
2053 struct lec_arp_table *entry;
2054 int i;
2055
2056 DPRINTK("lec_addr_delete\n");
2057 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2058 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2059 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
2060 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)
2061 && (permanent ||
2062 !(entry->flags & LEC_PERMANENT_FLAG))) {
2063 lec_arp_remove(priv, entry);
2064 lec_arp_put(entry);
2065 }
2066 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2067 return 0;
2068 }
2069 }
2070 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2071 return -1;
2072 }
2073
2074 /*
2075 * Notifies: Response to arp_request (atm_addr != NULL)
2076 */
2077 static void
2078 lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr,
2079 unsigned char *atm_addr, unsigned long remoteflag,
2080 unsigned int targetless_le_arp)
2081 {
2082 unsigned long flags;
2083 struct hlist_node *node, *next;
2084 struct lec_arp_table *entry, *tmp;
2085 int i;
2086
2087 DPRINTK("lec:%s", (targetless_le_arp) ? "targetless " : " ");
2088 DPRINTK("lec_arp_update mac:%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
2089 mac_addr[0], mac_addr[1], mac_addr[2], mac_addr[3],
2090 mac_addr[4], mac_addr[5]);
2091
2092 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2093 entry = lec_arp_find(priv, mac_addr);
2094 if (entry == NULL && targetless_le_arp)
2095 goto out; /*
2096 * LANE2: ignore targetless LE_ARPs for which
2097 * we have no entry in the cache. 7.1.30
2098 */
2099 if (!hlist_empty(&priv->lec_arp_empty_ones)) {
2100 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2101 if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) {
2102 hlist_del(&entry->next);
2103 del_timer(&entry->timer);
2104 tmp = lec_arp_find(priv, mac_addr);
2105 if (tmp) {
2106 del_timer(&tmp->timer);
2107 tmp->status = ESI_FORWARD_DIRECT;
2108 memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN);
2109 tmp->vcc = entry->vcc;
2110 tmp->old_push = entry->old_push;
2111 tmp->last_used = jiffies;
2112 del_timer(&entry->timer);
2113 lec_arp_put(entry);
2114 entry = tmp;
2115 } else {
2116 entry->status = ESI_FORWARD_DIRECT;
2117 memcpy(entry->mac_addr, mac_addr, ETH_ALEN);
2118 entry->last_used = jiffies;
2119 lec_arp_add(priv, entry);
2120 }
2121 if (remoteflag)
2122 entry->flags |= LEC_REMOTE_FLAG;
2123 else
2124 entry->flags &= ~LEC_REMOTE_FLAG;
2125 DPRINTK("After update\n");
2126 dump_arp_table(priv);
2127 goto out;
2128 }
2129 }
2130 }
2131
2132 entry = lec_arp_find(priv, mac_addr);
2133 if (!entry) {
2134 entry = make_entry(priv, mac_addr);
2135 if (!entry)
2136 goto out;
2137 entry->status = ESI_UNKNOWN;
2138 lec_arp_add(priv, entry);
2139 /* Temporary, changes before end of function */
2140 }
2141 memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN);
2142 del_timer(&entry->timer);
2143 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2144 hlist_for_each_entry(tmp, node, &priv->lec_arp_tables[i], next) {
2145 if (entry != tmp &&
2146 !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) {
2147 /* Vcc to this host exists */
2148 if (tmp->status > ESI_VC_PENDING) {
2149 /*
2150 * ESI_FLUSH_PENDING,
2151 * ESI_FORWARD_DIRECT
2152 */
2153 entry->vcc = tmp->vcc;
2154 entry->old_push = tmp->old_push;
2155 }
2156 entry->status = tmp->status;
2157 break;
2158 }
2159 }
2160 }
2161 if (remoteflag)
2162 entry->flags |= LEC_REMOTE_FLAG;
2163 else
2164 entry->flags &= ~LEC_REMOTE_FLAG;
2165 if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) {
2166 entry->status = ESI_VC_PENDING;
2167 send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL);
2168 }
2169 DPRINTK("After update2\n");
2170 dump_arp_table(priv);
2171 out:
2172 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2173 }
2174
2175 /*
2176 * Notifies: Vcc setup ready
2177 */
2178 static void
2179 lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data,
2180 struct atm_vcc *vcc,
2181 void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb))
2182 {
2183 unsigned long flags;
2184 struct hlist_node *node;
2185 struct lec_arp_table *entry;
2186 int i, found_entry = 0;
2187
2188 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2189 if (ioc_data->receive == 2) {
2190 /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */
2191
2192 DPRINTK("LEC_ARP: Attaching mcast forward\n");
2193 #if 0
2194 entry = lec_arp_find(priv, bus_mac);
2195 if (!entry) {
2196 printk("LEC_ARP: Multicast entry not found!\n");
2197 goto out;
2198 }
2199 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2200 entry->recv_vcc = vcc;
2201 entry->old_recv_push = old_push;
2202 #endif
2203 entry = make_entry(priv, bus_mac);
2204 if (entry == NULL)
2205 goto out;
2206 del_timer(&entry->timer);
2207 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2208 entry->recv_vcc = vcc;
2209 entry->old_recv_push = old_push;
2210 hlist_add_head(&entry->next, &priv->mcast_fwds);
2211 goto out;
2212 } else if (ioc_data->receive == 1) {
2213 /*
2214 * Vcc which we don't want to make default vcc,
2215 * attach it anyway.
2216 */
2217 DPRINTK
2218 ("LEC_ARP:Attaching data direct, not default: "
2219 "%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
2220 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2221 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2222 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2223 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2224 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2225 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2226 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2227 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2228 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2229 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2230 entry = make_entry(priv, bus_mac);
2231 if (entry == NULL)
2232 goto out;
2233 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2234 memset(entry->mac_addr, 0, ETH_ALEN);
2235 entry->recv_vcc = vcc;
2236 entry->old_recv_push = old_push;
2237 entry->status = ESI_UNKNOWN;
2238 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2239 entry->timer.function = lec_arp_expire_vcc;
2240 hlist_add_head(&entry->next, &priv->lec_no_forward);
2241 add_timer(&entry->timer);
2242 dump_arp_table(priv);
2243 goto out;
2244 }
2245 DPRINTK
2246 ("LEC_ARP:Attaching data direct, default: "
2247 "%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",
2248 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2249 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2250 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2251 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2252 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2253 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2254 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2255 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2256 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2257 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2258 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2259 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2260 if (memcmp
2261 (ioc_data->atm_addr, entry->atm_addr,
2262 ATM_ESA_LEN) == 0) {
2263 DPRINTK("LEC_ARP: Attaching data direct\n");
2264 DPRINTK("Currently -> Vcc: %d, Rvcc:%d\n",
2265 entry->vcc ? entry->vcc->vci : 0,
2266 entry->recv_vcc ? entry->recv_vcc->
2267 vci : 0);
2268 found_entry = 1;
2269 del_timer(&entry->timer);
2270 entry->vcc = vcc;
2271 entry->old_push = old_push;
2272 if (entry->status == ESI_VC_PENDING) {
2273 if (priv->maximum_unknown_frame_count
2274 == 0)
2275 entry->status =
2276 ESI_FORWARD_DIRECT;
2277 else {
2278 entry->timestamp = jiffies;
2279 entry->status =
2280 ESI_FLUSH_PENDING;
2281 #if 0
2282 send_to_lecd(priv, l_flush_xmt,
2283 NULL,
2284 entry->atm_addr,
2285 NULL);
2286 #endif
2287 }
2288 } else {
2289 /*
2290 * They were forming a connection
2291 * to us, and we to them. Our
2292 * ATM address is numerically lower
2293 * than theirs, so we make connection
2294 * we formed into default VCC (8.1.11).
2295 * Connection they made gets torn
2296 * down. This might confuse some
2297 * clients. Can be changed if
2298 * someone reports trouble...
2299 */
2300 ;
2301 }
2302 }
2303 }
2304 }
2305 if (found_entry) {
2306 DPRINTK("After vcc was added\n");
2307 dump_arp_table(priv);
2308 goto out;
2309 }
2310 /*
2311 * Not found, snatch address from first data packet that arrives
2312 * from this vcc
2313 */
2314 entry = make_entry(priv, bus_mac);
2315 if (!entry)
2316 goto out;
2317 entry->vcc = vcc;
2318 entry->old_push = old_push;
2319 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2320 memset(entry->mac_addr, 0, ETH_ALEN);
2321 entry->status = ESI_UNKNOWN;
2322 hlist_add_head(&entry->next, &priv->lec_arp_empty_ones);
2323 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2324 entry->timer.function = lec_arp_expire_vcc;
2325 add_timer(&entry->timer);
2326 DPRINTK("After vcc was added\n");
2327 dump_arp_table(priv);
2328 out:
2329 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2330 }
2331
2332 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id)
2333 {
2334 unsigned long flags;
2335 struct hlist_node *node;
2336 struct lec_arp_table *entry;
2337 int i;
2338
2339 DPRINTK("LEC:lec_flush_complete %lx\n", tran_id);
2340 restart:
2341 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2342 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2343 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2344 if (entry->flush_tran_id == tran_id
2345 && entry->status == ESI_FLUSH_PENDING) {
2346 struct sk_buff *skb;
2347 struct atm_vcc *vcc = entry->vcc;
2348
2349 lec_arp_hold(entry);
2350 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2351 while ((skb = skb_dequeue(&entry->tx_wait)) != NULL)
2352 lec_send(vcc, skb, entry->priv);
2353 entry->last_used = jiffies;
2354 entry->status = ESI_FORWARD_DIRECT;
2355 lec_arp_put(entry);
2356 DPRINTK("LEC_ARP: Flushed\n");
2357 goto restart;
2358 }
2359 }
2360 }
2361 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2362 dump_arp_table(priv);
2363 }
2364
2365 static void
2366 lec_set_flush_tran_id(struct lec_priv *priv,
2367 unsigned char *atm_addr, unsigned long tran_id)
2368 {
2369 unsigned long flags;
2370 struct hlist_node *node;
2371 struct lec_arp_table *entry;
2372 int i;
2373
2374 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2375 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
2376 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2377 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) {
2378 entry->flush_tran_id = tran_id;
2379 DPRINTK("Set flush transaction id to %lx for %p\n",
2380 tran_id, entry);
2381 }
2382 }
2383 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2384 }
2385
2386 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc)
2387 {
2388 unsigned long flags;
2389 unsigned char mac_addr[] = {
2390 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
2391 };
2392 struct lec_arp_table *to_add;
2393 struct lec_vcc_priv *vpriv;
2394 int err = 0;
2395
2396 if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL)))
2397 return -ENOMEM;
2398 vpriv->xoff = 0;
2399 vpriv->old_pop = vcc->pop;
2400 vcc->user_back = vpriv;
2401 vcc->pop = lec_pop;
2402 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2403 to_add = make_entry(priv, mac_addr);
2404 if (!to_add) {
2405 vcc->pop = vpriv->old_pop;
2406 kfree(vpriv);
2407 err = -ENOMEM;
2408 goto out;
2409 }
2410 memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN);
2411 to_add->status = ESI_FORWARD_DIRECT;
2412 to_add->flags |= LEC_PERMANENT_FLAG;
2413 to_add->vcc = vcc;
2414 to_add->old_push = vcc->push;
2415 vcc->push = lec_push;
2416 priv->mcast_vcc = vcc;
2417 lec_arp_add(priv, to_add);
2418 out:
2419 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2420 return err;
2421 }
2422
2423 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc)
2424 {
2425 unsigned long flags;
2426 struct hlist_node *node, *next;
2427 struct lec_arp_table *entry;
2428 int i;
2429
2430 DPRINTK("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci);
2431 dump_arp_table(priv);
2432
2433 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2434
2435 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2436 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
2437 if (vcc == entry->vcc) {
2438 lec_arp_remove(priv, entry);
2439 lec_arp_put(entry);
2440 if (priv->mcast_vcc == vcc) {
2441 priv->mcast_vcc = NULL;
2442 }
2443 }
2444 }
2445 }
2446
2447 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2448 if (entry->vcc == vcc) {
2449 lec_arp_clear_vccs(entry);
2450 del_timer(&entry->timer);
2451 hlist_del(&entry->next);
2452 lec_arp_put(entry);
2453 }
2454 }
2455
2456 hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) {
2457 if (entry->recv_vcc == vcc) {
2458 lec_arp_clear_vccs(entry);
2459 del_timer(&entry->timer);
2460 hlist_del(&entry->next);
2461 lec_arp_put(entry);
2462 }
2463 }
2464
2465 hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) {
2466 if (entry->recv_vcc == vcc) {
2467 lec_arp_clear_vccs(entry);
2468 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
2469 hlist_del(&entry->next);
2470 lec_arp_put(entry);
2471 }
2472 }
2473
2474 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2475 dump_arp_table(priv);
2476 }
2477
2478 static void
2479 lec_arp_check_empties(struct lec_priv *priv,
2480 struct atm_vcc *vcc, struct sk_buff *skb)
2481 {
2482 unsigned long flags;
2483 struct hlist_node *node, *next;
2484 struct lec_arp_table *entry, *tmp;
2485 struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data;
2486 unsigned char *src;
2487 #ifdef CONFIG_TR
2488 struct lecdatahdr_8025 *tr_hdr = (struct lecdatahdr_8025 *)skb->data;
2489
2490 if (priv->is_trdev)
2491 src = tr_hdr->h_source;
2492 else
2493 #endif
2494 src = hdr->h_source;
2495
2496 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2497 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2498 if (vcc == entry->vcc) {
2499 del_timer(&entry->timer);
2500 memcpy(entry->mac_addr, src, ETH_ALEN);
2501 entry->status = ESI_FORWARD_DIRECT;
2502 entry->last_used = jiffies;
2503 /* We might have got an entry */
2504 if ((tmp = lec_arp_find(priv, src))) {
2505 lec_arp_remove(priv, tmp);
2506 lec_arp_put(tmp);
2507 }
2508 hlist_del(&entry->next);
2509 lec_arp_add(priv, entry);
2510 goto out;
2511 }
2512 }
2513 DPRINTK("LEC_ARP: Arp_check_empties: entry not found!\n");
2514 out:
2515 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2516 }
2517
2518 MODULE_LICENSE("GPL");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree