1
2
3
4
5
6
7#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
8
9#include <linux/slab.h>
10#include <linux/kernel.h>
11#include <linux/bitops.h>
12#include <linux/capability.h>
13
14
15#include <linux/if_ether.h>
16#include <linux/netdevice.h>
17#include <linux/etherdevice.h>
18#include <net/sock.h>
19#include <linux/skbuff.h>
20#include <linux/ip.h>
21#include <asm/byteorder.h>
22#include <linux/uaccess.h>
23#include <net/arp.h>
24#include <net/dst.h>
25#include <linux/proc_fs.h>
26#include <linux/spinlock.h>
27#include <linux/seq_file.h>
28
29
30#include <linux/atmdev.h>
31#include <linux/atmlec.h>
32
33
34#if IS_ENABLED(CONFIG_BRIDGE)
35#include "../bridge/br_private.h"
36
37static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 };
38#endif
39
40
41#include <linux/module.h>
42#include <linux/init.h>
43
44
45#include <linux/nospec.h>
46
47#include "lec.h"
48#include "lec_arpc.h"
49#include "resources.h"
50
51#define DUMP_PACKETS 0
52
53
54
55
56
57#define LEC_UNRES_QUE_LEN 8
58
59
60
61
62static int lec_open(struct net_device *dev);
63static netdev_tx_t lec_start_xmit(struct sk_buff *skb,
64 struct net_device *dev);
65static int lec_close(struct net_device *dev);
66static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
67 const unsigned char *mac_addr);
68static int lec_arp_remove(struct lec_priv *priv,
69 struct lec_arp_table *to_remove);
70
71static void lane2_associate_ind(struct net_device *dev, const u8 *mac_address,
72 const u8 *tlvs, u32 sizeoftlvs);
73static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
74 u8 **tlvs, u32 *sizeoftlvs);
75static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,
76 const u8 *tlvs, u32 sizeoftlvs);
77
78static int lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr,
79 unsigned long permanent);
80static void lec_arp_check_empties(struct lec_priv *priv,
81 struct atm_vcc *vcc, struct sk_buff *skb);
82static void lec_arp_destroy(struct lec_priv *priv);
83static void lec_arp_init(struct lec_priv *priv);
84static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
85 const unsigned char *mac_to_find,
86 int is_rdesc,
87 struct lec_arp_table **ret_entry);
88static void lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr,
89 const unsigned char *atm_addr,
90 unsigned long remoteflag,
91 unsigned int targetless_le_arp);
92static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id);
93static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc);
94static void lec_set_flush_tran_id(struct lec_priv *priv,
95 const unsigned char *atm_addr,
96 unsigned long tran_id);
97static void lec_vcc_added(struct lec_priv *priv,
98 const struct atmlec_ioc *ioc_data,
99 struct atm_vcc *vcc,
100 void (*old_push)(struct atm_vcc *vcc,
101 struct sk_buff *skb));
102static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc);
103
104
105static inline void lec_arp_hold(struct lec_arp_table *entry)
106{
107 refcount_inc(&entry->usage);
108}
109
110static inline void lec_arp_put(struct lec_arp_table *entry)
111{
112 if (refcount_dec_and_test(&entry->usage))
113 kfree(entry);
114}
115
116static struct lane2_ops lane2_ops = {
117 .resolve = lane2_resolve,
118 .associate_req = lane2_associate_req,
119 .associate_indicator = NULL
120};
121
122static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
123
124
125static struct net_device *dev_lec[MAX_LEC_ITF];
126
127#if IS_ENABLED(CONFIG_BRIDGE)
128static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev)
129{
130 char *buff;
131 struct lec_priv *priv;
132
133
134
135
136
137
138 buff = skb->data + skb->dev->hard_header_len;
139 if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) {
140 struct sock *sk;
141 struct sk_buff *skb2;
142 struct atmlec_msg *mesg;
143
144 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
145 if (skb2 == NULL)
146 return;
147 skb2->len = sizeof(struct atmlec_msg);
148 mesg = (struct atmlec_msg *)skb2->data;
149 mesg->type = l_topology_change;
150 buff += 4;
151 mesg->content.normal.flag = *buff & 0x01;
152
153
154 priv = netdev_priv(dev);
155 atm_force_charge(priv->lecd, skb2->truesize);
156 sk = sk_atm(priv->lecd);
157 skb_queue_tail(&sk->sk_receive_queue, skb2);
158 sk->sk_data_ready(sk);
159 }
160}
161#endif
162
163
164
165
166
167
168
169
170
171
172static int lec_open(struct net_device *dev)
173{
174 netif_start_queue(dev);
175
176 return 0;
177}
178
179static void
180lec_send(struct atm_vcc *vcc, struct sk_buff *skb)
181{
182 struct net_device *dev = skb->dev;
183
184 ATM_SKB(skb)->vcc = vcc;
185 ATM_SKB(skb)->atm_options = vcc->atm_options;
186
187 refcount_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
188 if (vcc->send(vcc, skb) < 0) {
189 dev->stats.tx_dropped++;
190 return;
191 }
192
193 dev->stats.tx_packets++;
194 dev->stats.tx_bytes += skb->len;
195}
196
197static void lec_tx_timeout(struct net_device *dev)
198{
199 pr_info("%s\n", dev->name);
200 netif_trans_update(dev);
201 netif_wake_queue(dev);
202}
203
204static netdev_tx_t lec_start_xmit(struct sk_buff *skb,
205 struct net_device *dev)
206{
207 struct sk_buff *skb2;
208 struct lec_priv *priv = netdev_priv(dev);
209 struct lecdatahdr_8023 *lec_h;
210 struct atm_vcc *vcc;
211 struct lec_arp_table *entry;
212 unsigned char *dst;
213 int min_frame_size;
214 int is_rdesc;
215
216 pr_debug("called\n");
217 if (!priv->lecd) {
218 pr_info("%s:No lecd attached\n", dev->name);
219 dev->stats.tx_errors++;
220 netif_stop_queue(dev);
221 kfree_skb(skb);
222 return NETDEV_TX_OK;
223 }
224
225 pr_debug("skbuff head:%lx data:%lx tail:%lx end:%lx\n",
226 (long)skb->head, (long)skb->data, (long)skb_tail_pointer(skb),
227 (long)skb_end_pointer(skb));
228#if IS_ENABLED(CONFIG_BRIDGE)
229 if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0)
230 lec_handle_bridge(skb, dev);
231#endif
232
233
234 if (skb_headroom(skb) < 2) {
235 pr_debug("reallocating skb\n");
236 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
237 if (unlikely(!skb2)) {
238 kfree_skb(skb);
239 return NETDEV_TX_OK;
240 }
241 consume_skb(skb);
242 skb = skb2;
243 }
244 skb_push(skb, 2);
245
246
247 lec_h = (struct lecdatahdr_8023 *)skb->data;
248 lec_h->le_header = htons(priv->lecid);
249
250#if DUMP_PACKETS >= 2
251#define MAX_DUMP_SKB 99
252#elif DUMP_PACKETS >= 1
253#define MAX_DUMP_SKB 30
254#endif
255#if DUMP_PACKETS >= 1
256 printk(KERN_DEBUG "%s: send datalen:%ld lecid:%4.4x\n",
257 dev->name, skb->len, priv->lecid);
258 print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1,
259 skb->data, min(skb->len, MAX_DUMP_SKB), true);
260#endif
261
262
263 min_frame_size = LEC_MINIMUM_8023_SIZE;
264 if (skb->len < min_frame_size) {
265 if ((skb->len + skb_tailroom(skb)) < min_frame_size) {
266 skb2 = skb_copy_expand(skb, 0,
267 min_frame_size - skb->truesize,
268 GFP_ATOMIC);
269 dev_kfree_skb(skb);
270 if (skb2 == NULL) {
271 dev->stats.tx_dropped++;
272 return NETDEV_TX_OK;
273 }
274 skb = skb2;
275 }
276 skb_put(skb, min_frame_size - skb->len);
277 }
278
279
280 is_rdesc = 0;
281 dst = lec_h->h_dest;
282 entry = NULL;
283 vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry);
284 pr_debug("%s:vcc:%p vcc_flags:%lx, entry:%p\n",
285 dev->name, vcc, vcc ? vcc->flags : 0, entry);
286 if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) {
287 if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) {
288 pr_debug("%s:queuing packet, MAC address %pM\n",
289 dev->name, lec_h->h_dest);
290 skb_queue_tail(&entry->tx_wait, skb);
291 } else {
292 pr_debug("%s:tx queue full or no arp entry, dropping, MAC address: %pM\n",
293 dev->name, lec_h->h_dest);
294 dev->stats.tx_dropped++;
295 dev_kfree_skb(skb);
296 }
297 goto out;
298 }
299#if DUMP_PACKETS > 0
300 printk(KERN_DEBUG "%s:sending to vpi:%d vci:%d\n",
301 dev->name, vcc->vpi, vcc->vci);
302#endif
303
304 while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) {
305 pr_debug("emptying tx queue, MAC address %pM\n", lec_h->h_dest);
306 lec_send(vcc, skb2);
307 }
308
309 lec_send(vcc, skb);
310
311 if (!atm_may_send(vcc, 0)) {
312 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
313
314 vpriv->xoff = 1;
315 netif_stop_queue(dev);
316
317
318
319
320
321
322
323 if (atm_may_send(vcc, 0))
324 netif_wake_queue(dev);
325 }
326
327out:
328 if (entry)
329 lec_arp_put(entry);
330 netif_trans_update(dev);
331 return NETDEV_TX_OK;
332}
333
334
335static int lec_close(struct net_device *dev)
336{
337 netif_stop_queue(dev);
338 return 0;
339}
340
341static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
342{
343 unsigned long flags;
344 struct net_device *dev = (struct net_device *)vcc->proto_data;
345 struct lec_priv *priv = netdev_priv(dev);
346 struct atmlec_msg *mesg;
347 struct lec_arp_table *entry;
348 int i;
349 char *tmp;
350
351 WARN_ON(refcount_sub_and_test(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc));
352 mesg = (struct atmlec_msg *)skb->data;
353 tmp = skb->data;
354 tmp += sizeof(struct atmlec_msg);
355 pr_debug("%s: msg from zeppelin:%d\n", dev->name, mesg->type);
356 switch (mesg->type) {
357 case l_set_mac_addr:
358 for (i = 0; i < 6; i++)
359 dev->dev_addr[i] = mesg->content.normal.mac_addr[i];
360 break;
361 case l_del_mac_addr:
362 for (i = 0; i < 6; i++)
363 dev->dev_addr[i] = 0;
364 break;
365 case l_addr_delete:
366 lec_addr_delete(priv, mesg->content.normal.atm_addr,
367 mesg->content.normal.flag);
368 break;
369 case l_topology_change:
370 priv->topology_change = mesg->content.normal.flag;
371 break;
372 case l_flush_complete:
373 lec_flush_complete(priv, mesg->content.normal.flag);
374 break;
375 case l_narp_req:
376 spin_lock_irqsave(&priv->lec_arp_lock, flags);
377 entry = lec_arp_find(priv, mesg->content.normal.mac_addr);
378 lec_arp_remove(priv, entry);
379 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
380
381 if (mesg->content.normal.no_source_le_narp)
382 break;
383
384 case l_arp_update:
385 lec_arp_update(priv, mesg->content.normal.mac_addr,
386 mesg->content.normal.atm_addr,
387 mesg->content.normal.flag,
388 mesg->content.normal.targetless_le_arp);
389 pr_debug("in l_arp_update\n");
390 if (mesg->sizeoftlvs != 0) {
391 pr_debug("LANE2 3.1.5, got tlvs, size %d\n",
392 mesg->sizeoftlvs);
393 lane2_associate_ind(dev, mesg->content.normal.mac_addr,
394 tmp, mesg->sizeoftlvs);
395 }
396 break;
397 case l_config:
398 priv->maximum_unknown_frame_count =
399 mesg->content.config.maximum_unknown_frame_count;
400 priv->max_unknown_frame_time =
401 (mesg->content.config.max_unknown_frame_time * HZ);
402 priv->max_retry_count = mesg->content.config.max_retry_count;
403 priv->aging_time = (mesg->content.config.aging_time * HZ);
404 priv->forward_delay_time =
405 (mesg->content.config.forward_delay_time * HZ);
406 priv->arp_response_time =
407 (mesg->content.config.arp_response_time * HZ);
408 priv->flush_timeout = (mesg->content.config.flush_timeout * HZ);
409 priv->path_switching_delay =
410 (mesg->content.config.path_switching_delay * HZ);
411 priv->lane_version = mesg->content.config.lane_version;
412
413 priv->lane2_ops = NULL;
414 if (priv->lane_version > 1)
415 priv->lane2_ops = &lane2_ops;
416 rtnl_lock();
417 if (dev_set_mtu(dev, mesg->content.config.mtu))
418 pr_info("%s: change_mtu to %d failed\n",
419 dev->name, mesg->content.config.mtu);
420 rtnl_unlock();
421 priv->is_proxy = mesg->content.config.is_proxy;
422 break;
423 case l_flush_tran_id:
424 lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr,
425 mesg->content.normal.flag);
426 break;
427 case l_set_lecid:
428 priv->lecid =
429 (unsigned short)(0xffff & mesg->content.normal.flag);
430 break;
431 case l_should_bridge:
432#if IS_ENABLED(CONFIG_BRIDGE)
433 {
434 pr_debug("%s: bridge zeppelin asks about %pM\n",
435 dev->name, mesg->content.proxy.mac_addr);
436
437 if (br_fdb_test_addr_hook == NULL)
438 break;
439
440 if (br_fdb_test_addr_hook(dev, mesg->content.proxy.mac_addr)) {
441
442 struct sk_buff *skb2;
443 struct sock *sk;
444
445 pr_debug("%s: entry found, responding to zeppelin\n",
446 dev->name);
447 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
448 if (skb2 == NULL)
449 break;
450 skb2->len = sizeof(struct atmlec_msg);
451 skb_copy_to_linear_data(skb2, mesg, sizeof(*mesg));
452 atm_force_charge(priv->lecd, skb2->truesize);
453 sk = sk_atm(priv->lecd);
454 skb_queue_tail(&sk->sk_receive_queue, skb2);
455 sk->sk_data_ready(sk);
456 }
457 }
458#endif
459 break;
460 default:
461 pr_info("%s: Unknown message type %d\n", dev->name, mesg->type);
462 dev_kfree_skb(skb);
463 return -EINVAL;
464 }
465 dev_kfree_skb(skb);
466 return 0;
467}
468
469static void lec_atm_close(struct atm_vcc *vcc)
470{
471 struct sk_buff *skb;
472 struct net_device *dev = (struct net_device *)vcc->proto_data;
473 struct lec_priv *priv = netdev_priv(dev);
474
475 priv->lecd = NULL;
476
477
478 netif_stop_queue(dev);
479 lec_arp_destroy(priv);
480
481 if (skb_peek(&sk_atm(vcc)->sk_receive_queue))
482 pr_info("%s closing with messages pending\n", dev->name);
483 while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue))) {
484 atm_return(vcc, skb->truesize);
485 dev_kfree_skb(skb);
486 }
487
488 pr_info("%s: Shut down!\n", dev->name);
489 module_put(THIS_MODULE);
490}
491
492static const struct atmdev_ops lecdev_ops = {
493 .close = lec_atm_close,
494 .send = lec_atm_send
495};
496
497static struct atm_dev lecatm_dev = {
498 .ops = &lecdev_ops,
499 .type = "lec",
500 .number = 999,
501 .lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock)
502};
503
504
505
506
507
508static int
509send_to_lecd(struct lec_priv *priv, atmlec_msg_type type,
510 const unsigned char *mac_addr, const unsigned char *atm_addr,
511 struct sk_buff *data)
512{
513 struct sock *sk;
514 struct sk_buff *skb;
515 struct atmlec_msg *mesg;
516
517 if (!priv || !priv->lecd)
518 return -1;
519 skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
520 if (!skb)
521 return -1;
522 skb->len = sizeof(struct atmlec_msg);
523 mesg = (struct atmlec_msg *)skb->data;
524 memset(mesg, 0, sizeof(struct atmlec_msg));
525 mesg->type = type;
526 if (data != NULL)
527 mesg->sizeoftlvs = data->len;
528 if (mac_addr)
529 ether_addr_copy(mesg->content.normal.mac_addr, mac_addr);
530 else
531 mesg->content.normal.targetless_le_arp = 1;
532 if (atm_addr)
533 memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN);
534
535 atm_force_charge(priv->lecd, skb->truesize);
536 sk = sk_atm(priv->lecd);
537 skb_queue_tail(&sk->sk_receive_queue, skb);
538 sk->sk_data_ready(sk);
539
540 if (data != NULL) {
541 pr_debug("about to send %d bytes of data\n", data->len);
542 atm_force_charge(priv->lecd, data->truesize);
543 skb_queue_tail(&sk->sk_receive_queue, data);
544 sk->sk_data_ready(sk);
545 }
546
547 return 0;
548}
549
550static void lec_set_multicast_list(struct net_device *dev)
551{
552
553
554
555
556}
557
558static const struct net_device_ops lec_netdev_ops = {
559 .ndo_open = lec_open,
560 .ndo_stop = lec_close,
561 .ndo_start_xmit = lec_start_xmit,
562 .ndo_tx_timeout = lec_tx_timeout,
563 .ndo_set_rx_mode = lec_set_multicast_list,
564};
565
566static const unsigned char lec_ctrl_magic[] = {
567 0xff,
568 0x00,
569 0x01,
570 0x01
571};
572
573#define LEC_DATA_DIRECT_8023 2
574#define LEC_DATA_DIRECT_8025 3
575
576static int lec_is_data_direct(struct atm_vcc *vcc)
577{
578 return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) ||
579 (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025));
580}
581
582static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb)
583{
584 unsigned long flags;
585 struct net_device *dev = (struct net_device *)vcc->proto_data;
586 struct lec_priv *priv = netdev_priv(dev);
587
588#if DUMP_PACKETS > 0
589 printk(KERN_DEBUG "%s: vcc vpi:%d vci:%d\n",
590 dev->name, vcc->vpi, vcc->vci);
591#endif
592 if (!skb) {
593 pr_debug("%s: null skb\n", dev->name);
594 lec_vcc_close(priv, vcc);
595 return;
596 }
597#if DUMP_PACKETS >= 2
598#define MAX_SKB_DUMP 99
599#elif DUMP_PACKETS >= 1
600#define MAX_SKB_DUMP 30
601#endif
602#if DUMP_PACKETS > 0
603 printk(KERN_DEBUG "%s: rcv datalen:%ld lecid:%4.4x\n",
604 dev->name, skb->len, priv->lecid);
605 print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1,
606 skb->data, min(MAX_SKB_DUMP, skb->len), true);
607#endif
608 if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) {
609
610 struct sock *sk = sk_atm(vcc);
611
612 pr_debug("%s: To daemon\n", dev->name);
613 skb_queue_tail(&sk->sk_receive_queue, skb);
614 sk->sk_data_ready(sk);
615 } else {
616 struct lec_arp_table *entry;
617 unsigned char *src, *dst;
618
619 atm_return(vcc, skb->truesize);
620 if (*(__be16 *) skb->data == htons(priv->lecid) ||
621 !priv->lecd || !(dev->flags & IFF_UP)) {
622
623
624
625
626 pr_debug("Ignoring frame...\n");
627 dev_kfree_skb(skb);
628 return;
629 }
630 dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest;
631
632
633
634
635
636 spin_lock_irqsave(&priv->lec_arp_lock, flags);
637 if (lec_is_data_direct(vcc)) {
638 src = ((struct lecdatahdr_8023 *)skb->data)->h_source;
639 entry = lec_arp_find(priv, src);
640 if (entry && entry->vcc != vcc) {
641 lec_arp_remove(priv, entry);
642 lec_arp_put(entry);
643 }
644 }
645 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
646
647 if (!(dst[0] & 0x01) &&
648 !priv->is_proxy &&
649 memcmp(dst, dev->dev_addr, dev->addr_len)) {
650 dev_kfree_skb(skb);
651 return;
652 }
653 if (!hlist_empty(&priv->lec_arp_empty_ones))
654 lec_arp_check_empties(priv, vcc, skb);
655 skb_pull(skb, 2);
656 skb->protocol = eth_type_trans(skb, dev);
657 dev->stats.rx_packets++;
658 dev->stats.rx_bytes += skb->len;
659 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
660 netif_rx(skb);
661 }
662}
663
664static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb)
665{
666 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
667 struct net_device *dev = skb->dev;
668
669 if (vpriv == NULL) {
670 pr_info("vpriv = NULL!?!?!?\n");
671 return;
672 }
673
674 vpriv->old_pop(vcc, skb);
675
676 if (vpriv->xoff && atm_may_send(vcc, 0)) {
677 vpriv->xoff = 0;
678 if (netif_running(dev) && netif_queue_stopped(dev))
679 netif_wake_queue(dev);
680 }
681}
682
683static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg)
684{
685 struct lec_vcc_priv *vpriv;
686 int bytes_left;
687 struct atmlec_ioc ioc_data;
688
689
690 bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc));
691 if (bytes_left != 0)
692 pr_info("copy from user failed for %d bytes\n", bytes_left);
693 if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF)
694 return -EINVAL;
695 ioc_data.dev_num = array_index_nospec(ioc_data.dev_num, MAX_LEC_ITF);
696 if (!dev_lec[ioc_data.dev_num])
697 return -EINVAL;
698 vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL);
699 if (!vpriv)
700 return -ENOMEM;
701 vpriv->xoff = 0;
702 vpriv->old_pop = vcc->pop;
703 vcc->user_back = vpriv;
704 vcc->pop = lec_pop;
705 lec_vcc_added(netdev_priv(dev_lec[ioc_data.dev_num]),
706 &ioc_data, vcc, vcc->push);
707 vcc->proto_data = dev_lec[ioc_data.dev_num];
708 vcc->push = lec_push;
709 return 0;
710}
711
712static int lec_mcast_attach(struct atm_vcc *vcc, int arg)
713{
714 if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg])
715 return -EINVAL;
716 vcc->proto_data = dev_lec[arg];
717 return lec_mcast_make(netdev_priv(dev_lec[arg]), vcc);
718}
719
720
721static int lecd_attach(struct atm_vcc *vcc, int arg)
722{
723 int i;
724 struct lec_priv *priv;
725
726 if (arg < 0)
727 i = 0;
728 else
729 i = arg;
730 if (arg >= MAX_LEC_ITF)
731 return -EINVAL;
732 if (!dev_lec[i]) {
733 int size;
734
735 size = sizeof(struct lec_priv);
736 dev_lec[i] = alloc_etherdev(size);
737 if (!dev_lec[i])
738 return -ENOMEM;
739 dev_lec[i]->netdev_ops = &lec_netdev_ops;
740 dev_lec[i]->max_mtu = 18190;
741 snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i);
742 if (register_netdev(dev_lec[i])) {
743 free_netdev(dev_lec[i]);
744 return -EINVAL;
745 }
746
747 priv = netdev_priv(dev_lec[i]);
748 } else {
749 priv = netdev_priv(dev_lec[i]);
750 if (priv->lecd)
751 return -EADDRINUSE;
752 }
753 lec_arp_init(priv);
754 priv->itfnum = i;
755 priv->lecd = vcc;
756 vcc->dev = &lecatm_dev;
757 vcc_insert_socket(sk_atm(vcc));
758
759 vcc->proto_data = dev_lec[i];
760 set_bit(ATM_VF_META, &vcc->flags);
761 set_bit(ATM_VF_READY, &vcc->flags);
762
763
764 priv->maximum_unknown_frame_count = 1;
765 priv->max_unknown_frame_time = (1 * HZ);
766 priv->vcc_timeout_period = (1200 * HZ);
767 priv->max_retry_count = 1;
768 priv->aging_time = (300 * HZ);
769 priv->forward_delay_time = (15 * HZ);
770 priv->topology_change = 0;
771 priv->arp_response_time = (1 * HZ);
772 priv->flush_timeout = (4 * HZ);
773 priv->path_switching_delay = (6 * HZ);
774
775 if (dev_lec[i]->flags & IFF_UP)
776 netif_start_queue(dev_lec[i]);
777 __module_get(THIS_MODULE);
778 return i;
779}
780
781#ifdef CONFIG_PROC_FS
782static const char *lec_arp_get_status_string(unsigned char status)
783{
784 static const char *const lec_arp_status_string[] = {
785 "ESI_UNKNOWN ",
786 "ESI_ARP_PENDING ",
787 "ESI_VC_PENDING ",
788 "<Undefined> ",
789 "ESI_FLUSH_PENDING ",
790 "ESI_FORWARD_DIRECT"
791 };
792
793 if (status > ESI_FORWARD_DIRECT)
794 status = 3;
795 return lec_arp_status_string[status];
796}
797
798static void lec_info(struct seq_file *seq, struct lec_arp_table *entry)
799{
800 int i;
801
802 for (i = 0; i < ETH_ALEN; i++)
803 seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff);
804 seq_printf(seq, " ");
805 for (i = 0; i < ATM_ESA_LEN; i++)
806 seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff);
807 seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status),
808 entry->flags & 0xffff);
809 if (entry->vcc)
810 seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci);
811 else
812 seq_printf(seq, " ");
813 if (entry->recv_vcc) {
814 seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi,
815 entry->recv_vcc->vci);
816 }
817 seq_putc(seq, '\n');
818}
819
820struct lec_state {
821 unsigned long flags;
822 struct lec_priv *locked;
823 struct hlist_node *node;
824 struct net_device *dev;
825 int itf;
826 int arp_table;
827 int misc_table;
828};
829
830static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl,
831 loff_t *l)
832{
833 struct hlist_node *e = state->node;
834
835 if (!e)
836 e = tbl->first;
837 if (e == SEQ_START_TOKEN) {
838 e = tbl->first;
839 --*l;
840 }
841
842 for (; e; e = e->next) {
843 if (--*l < 0)
844 break;
845 }
846 state->node = e;
847
848 return (*l < 0) ? state : NULL;
849}
850
851static void *lec_arp_walk(struct lec_state *state, loff_t *l,
852 struct lec_priv *priv)
853{
854 void *v = NULL;
855 int p;
856
857 for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) {
858 v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l);
859 if (v)
860 break;
861 }
862 state->arp_table = p;
863 return v;
864}
865
866static void *lec_misc_walk(struct lec_state *state, loff_t *l,
867 struct lec_priv *priv)
868{
869 struct hlist_head *lec_misc_tables[] = {
870 &priv->lec_arp_empty_ones,
871 &priv->lec_no_forward,
872 &priv->mcast_fwds
873 };
874 void *v = NULL;
875 int q;
876
877 for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) {
878 v = lec_tbl_walk(state, lec_misc_tables[q], l);
879 if (v)
880 break;
881 }
882 state->misc_table = q;
883 return v;
884}
885
886static void *lec_priv_walk(struct lec_state *state, loff_t *l,
887 struct lec_priv *priv)
888{
889 if (!state->locked) {
890 state->locked = priv;
891 spin_lock_irqsave(&priv->lec_arp_lock, state->flags);
892 }
893 if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) {
894 spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags);
895 state->locked = NULL;
896
897 state->arp_table = state->misc_table = 0;
898 }
899 return state->locked;
900}
901
902static void *lec_itf_walk(struct lec_state *state, loff_t *l)
903{
904 struct net_device *dev;
905 void *v;
906
907 dev = state->dev ? state->dev : dev_lec[state->itf];
908 v = (dev && netdev_priv(dev)) ?
909 lec_priv_walk(state, l, netdev_priv(dev)) : NULL;
910 if (!v && dev) {
911 dev_put(dev);
912
913 dev = NULL;
914 }
915 state->dev = dev;
916 return v;
917}
918
919static void *lec_get_idx(struct lec_state *state, loff_t l)
920{
921 void *v = NULL;
922
923 for (; state->itf < MAX_LEC_ITF; state->itf++) {
924 v = lec_itf_walk(state, &l);
925 if (v)
926 break;
927 }
928 return v;
929}
930
931static void *lec_seq_start(struct seq_file *seq, loff_t *pos)
932{
933 struct lec_state *state = seq->private;
934
935 state->itf = 0;
936 state->dev = NULL;
937 state->locked = NULL;
938 state->arp_table = 0;
939 state->misc_table = 0;
940 state->node = SEQ_START_TOKEN;
941
942 return *pos ? lec_get_idx(state, *pos) : SEQ_START_TOKEN;
943}
944
945static void lec_seq_stop(struct seq_file *seq, void *v)
946{
947 struct lec_state *state = seq->private;
948
949 if (state->dev) {
950 spin_unlock_irqrestore(&state->locked->lec_arp_lock,
951 state->flags);
952 dev_put(state->dev);
953 }
954}
955
956static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos)
957{
958 struct lec_state *state = seq->private;
959
960 v = lec_get_idx(state, 1);
961 *pos += !!PTR_ERR(v);
962 return v;
963}
964
965static int lec_seq_show(struct seq_file *seq, void *v)
966{
967 static const char lec_banner[] =
968 "Itf MAC ATM destination"
969 " Status Flags "
970 "VPI/VCI Recv VPI/VCI\n";
971
972 if (v == SEQ_START_TOKEN)
973 seq_puts(seq, lec_banner);
974 else {
975 struct lec_state *state = seq->private;
976 struct net_device *dev = state->dev;
977 struct lec_arp_table *entry = hlist_entry(state->node,
978 struct lec_arp_table,
979 next);
980
981 seq_printf(seq, "%s ", dev->name);
982 lec_info(seq, entry);
983 }
984 return 0;
985}
986
987static const struct seq_operations lec_seq_ops = {
988 .start = lec_seq_start,
989 .next = lec_seq_next,
990 .stop = lec_seq_stop,
991 .show = lec_seq_show,
992};
993
994static int lec_seq_open(struct inode *inode, struct file *file)
995{
996 return seq_open_private(file, &lec_seq_ops, sizeof(struct lec_state));
997}
998
999static const struct file_operations lec_seq_fops = {
1000 .open = lec_seq_open,
1001 .read = seq_read,
1002 .llseek = seq_lseek,
1003 .release = seq_release_private,
1004};
1005#endif
1006
1007static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1008{
1009 struct atm_vcc *vcc = ATM_SD(sock);
1010 int err = 0;
1011
1012 switch (cmd) {
1013 case ATMLEC_CTRL:
1014 case ATMLEC_MCAST:
1015 case ATMLEC_DATA:
1016 if (!capable(CAP_NET_ADMIN))
1017 return -EPERM;
1018 break;
1019 default:
1020 return -ENOIOCTLCMD;
1021 }
1022
1023 switch (cmd) {
1024 case ATMLEC_CTRL:
1025 err = lecd_attach(vcc, (int)arg);
1026 if (err >= 0)
1027 sock->state = SS_CONNECTED;
1028 break;
1029 case ATMLEC_MCAST:
1030 err = lec_mcast_attach(vcc, (int)arg);
1031 break;
1032 case ATMLEC_DATA:
1033 err = lec_vcc_attach(vcc, (void __user *)arg);
1034 break;
1035 }
1036
1037 return err;
1038}
1039
1040static struct atm_ioctl lane_ioctl_ops = {
1041 .owner = THIS_MODULE,
1042 .ioctl = lane_ioctl,
1043};
1044
1045static int __init lane_module_init(void)
1046{
1047#ifdef CONFIG_PROC_FS
1048 struct proc_dir_entry *p;
1049
1050 p = proc_create("lec", 0444, atm_proc_root, &lec_seq_fops);
1051 if (!p) {
1052 pr_err("Unable to initialize /proc/net/atm/lec\n");
1053 return -ENOMEM;
1054 }
1055#endif
1056
1057 register_atm_ioctl(&lane_ioctl_ops);
1058 pr_info("lec.c: initialized\n");
1059 return 0;
1060}
1061
1062static void __exit lane_module_cleanup(void)
1063{
1064 int i;
1065
1066#ifdef CONFIG_PROC_FS
1067 remove_proc_entry("lec", atm_proc_root);
1068#endif
1069
1070 deregister_atm_ioctl(&lane_ioctl_ops);
1071
1072 for (i = 0; i < MAX_LEC_ITF; i++) {
1073 if (dev_lec[i] != NULL) {
1074 unregister_netdev(dev_lec[i]);
1075 free_netdev(dev_lec[i]);
1076 dev_lec[i] = NULL;
1077 }
1078 }
1079}
1080
1081module_init(lane_module_init);
1082module_exit(lane_module_cleanup);
1083
1084
1085
1086
1087
1088
1089
1090
1091static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
1092 u8 **tlvs, u32 *sizeoftlvs)
1093{
1094 unsigned long flags;
1095 struct lec_priv *priv = netdev_priv(dev);
1096 struct lec_arp_table *table;
1097 struct sk_buff *skb;
1098 int retval;
1099
1100 if (force == 0) {
1101 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1102 table = lec_arp_find(priv, dst_mac);
1103 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1104 if (table == NULL)
1105 return -1;
1106
1107 *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC);
1108 if (*tlvs == NULL)
1109 return -1;
1110
1111 *sizeoftlvs = table->sizeoftlvs;
1112
1113 return 0;
1114 }
1115
1116 if (sizeoftlvs == NULL)
1117 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL);
1118
1119 else {
1120 skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC);
1121 if (skb == NULL)
1122 return -1;
1123 skb->len = *sizeoftlvs;
1124 skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs);
1125 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb);
1126 }
1127 return retval;
1128}
1129
1130
1131
1132
1133
1134
1135
1136
1137static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,
1138 const u8 *tlvs, u32 sizeoftlvs)
1139{
1140 int retval;
1141 struct sk_buff *skb;
1142 struct lec_priv *priv = netdev_priv(dev);
1143
1144 if (!ether_addr_equal(lan_dst, dev->dev_addr))
1145 return 0;
1146
1147 kfree(priv->tlvs);
1148
1149 priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1150 if (priv->tlvs == NULL)
1151 return 0;
1152 priv->sizeoftlvs = sizeoftlvs;
1153
1154 skb = alloc_skb(sizeoftlvs, GFP_ATOMIC);
1155 if (skb == NULL)
1156 return 0;
1157 skb->len = sizeoftlvs;
1158 skb_copy_to_linear_data(skb, tlvs, sizeoftlvs);
1159 retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb);
1160 if (retval != 0)
1161 pr_info("lec.c: lane2_associate_req() failed\n");
1162
1163
1164
1165
1166 return 1;
1167}
1168
1169
1170
1171
1172
1173static void lane2_associate_ind(struct net_device *dev, const u8 *mac_addr,
1174 const u8 *tlvs, u32 sizeoftlvs)
1175{
1176#if 0
1177 int i = 0;
1178#endif
1179 struct lec_priv *priv = netdev_priv(dev);
1180#if 0
1181
1182
1183
1184
1185
1186 struct lec_arp_table *entry = lec_arp_find(priv, mac_addr);
1187
1188 if (entry == NULL)
1189 return;
1190
1191 kfree(entry->tlvs);
1192
1193 entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1194 if (entry->tlvs == NULL)
1195 return;
1196 entry->sizeoftlvs = sizeoftlvs;
1197#endif
1198#if 0
1199 pr_info("\n");
1200 pr_info("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs);
1201 while (i < sizeoftlvs)
1202 pr_cont("%02x ", tlvs[i++]);
1203
1204 pr_cont("\n");
1205#endif
1206
1207
1208 if (priv->lane2_ops && priv->lane2_ops->associate_indicator) {
1209 priv->lane2_ops->associate_indicator(dev, mac_addr,
1210 tlvs, sizeoftlvs);
1211 }
1212}
1213
1214
1215
1216
1217
1218
1219
1220
1221#include <linux/types.h>
1222#include <linux/timer.h>
1223#include <linux/param.h>
1224#include <linux/atomic.h>
1225#include <linux/inetdevice.h>
1226#include <net/route.h>
1227
1228#if 0
1229#define pr_debug(format, args...)
1230
1231
1232
1233#endif
1234#define DEBUG_ARP_TABLE 0
1235
1236#define LEC_ARP_REFRESH_INTERVAL (3*HZ)
1237
1238static void lec_arp_check_expire(struct work_struct *work);
1239static void lec_arp_expire_arp(struct timer_list *t);
1240
1241
1242
1243
1244
1245#define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE - 1))
1246
1247
1248
1249
1250static void lec_arp_init(struct lec_priv *priv)
1251{
1252 unsigned short i;
1253
1254 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
1255 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1256 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1257 INIT_HLIST_HEAD(&priv->lec_no_forward);
1258 INIT_HLIST_HEAD(&priv->mcast_fwds);
1259 spin_lock_init(&priv->lec_arp_lock);
1260 INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire);
1261 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1262}
1263
1264static void lec_arp_clear_vccs(struct lec_arp_table *entry)
1265{
1266 if (entry->vcc) {
1267 struct atm_vcc *vcc = entry->vcc;
1268 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
1269 struct net_device *dev = (struct net_device *)vcc->proto_data;
1270
1271 vcc->pop = vpriv->old_pop;
1272 if (vpriv->xoff)
1273 netif_wake_queue(dev);
1274 kfree(vpriv);
1275 vcc->user_back = NULL;
1276 vcc->push = entry->old_push;
1277 vcc_release_async(vcc, -EPIPE);
1278 entry->vcc = NULL;
1279 }
1280 if (entry->recv_vcc) {
1281 entry->recv_vcc->push = entry->old_recv_push;
1282 vcc_release_async(entry->recv_vcc, -EPIPE);
1283 entry->recv_vcc = NULL;
1284 }
1285}
1286
1287
1288
1289
1290
1291static inline void
1292lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry)
1293{
1294 struct hlist_head *tmp;
1295
1296 tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])];
1297 hlist_add_head(&entry->next, tmp);
1298
1299 pr_debug("Added entry:%pM\n", entry->mac_addr);
1300}
1301
1302
1303
1304
1305static int
1306lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove)
1307{
1308 struct lec_arp_table *entry;
1309 int i, remove_vcc = 1;
1310
1311 if (!to_remove)
1312 return -1;
1313
1314 hlist_del(&to_remove->next);
1315 del_timer(&to_remove->timer);
1316
1317
1318
1319
1320
1321 if (to_remove->status >= ESI_FLUSH_PENDING) {
1322
1323
1324
1325 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1326 hlist_for_each_entry(entry,
1327 &priv->lec_arp_tables[i], next) {
1328 if (memcmp(to_remove->atm_addr,
1329 entry->atm_addr, ATM_ESA_LEN) == 0) {
1330 remove_vcc = 0;
1331 break;
1332 }
1333 }
1334 }
1335 if (remove_vcc)
1336 lec_arp_clear_vccs(to_remove);
1337 }
1338 skb_queue_purge(&to_remove->tx_wait);
1339
1340 pr_debug("Removed entry:%pM\n", to_remove->mac_addr);
1341 return 0;
1342}
1343
1344#if DEBUG_ARP_TABLE
1345static const char *get_status_string(unsigned char st)
1346{
1347 switch (st) {
1348 case ESI_UNKNOWN:
1349 return "ESI_UNKNOWN";
1350 case ESI_ARP_PENDING:
1351 return "ESI_ARP_PENDING";
1352 case ESI_VC_PENDING:
1353 return "ESI_VC_PENDING";
1354 case ESI_FLUSH_PENDING:
1355 return "ESI_FLUSH_PENDING";
1356 case ESI_FORWARD_DIRECT:
1357 return "ESI_FORWARD_DIRECT";
1358 }
1359 return "<UNKNOWN>";
1360}
1361
1362static void dump_arp_table(struct lec_priv *priv)
1363{
1364 struct lec_arp_table *rulla;
1365 char buf[256];
1366 int i, j, offset;
1367
1368 pr_info("Dump %p:\n", priv);
1369 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1370 hlist_for_each_entry(rulla,
1371 &priv->lec_arp_tables[i], next) {
1372 offset = 0;
1373 offset += sprintf(buf, "%d: %p\n", i, rulla);
1374 offset += sprintf(buf + offset, "Mac: %pM",
1375 rulla->mac_addr);
1376 offset += sprintf(buf + offset, " Atm:");
1377 for (j = 0; j < ATM_ESA_LEN; j++) {
1378 offset += sprintf(buf + offset,
1379 "%2.2x ",
1380 rulla->atm_addr[j] & 0xff);
1381 }
1382 offset += sprintf(buf + offset,
1383 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1384 rulla->vcc ? rulla->vcc->vpi : 0,
1385 rulla->vcc ? rulla->vcc->vci : 0,
1386 rulla->recv_vcc ? rulla->recv_vcc->
1387 vpi : 0,
1388 rulla->recv_vcc ? rulla->recv_vcc->
1389 vci : 0, rulla->last_used,
1390 rulla->timestamp, rulla->no_tries);
1391 offset +=
1392 sprintf(buf + offset,
1393 "Flags:%x, Packets_flooded:%x, Status: %s ",
1394 rulla->flags, rulla->packets_flooded,
1395 get_status_string(rulla->status));
1396 pr_info("%s\n", buf);
1397 }
1398 }
1399
1400 if (!hlist_empty(&priv->lec_no_forward))
1401 pr_info("No forward\n");
1402 hlist_for_each_entry(rulla, &priv->lec_no_forward, next) {
1403 offset = 0;
1404 offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr);
1405 offset += sprintf(buf + offset, " Atm:");
1406 for (j = 0; j < ATM_ESA_LEN; j++) {
1407 offset += sprintf(buf + offset, "%2.2x ",
1408 rulla->atm_addr[j] & 0xff);
1409 }
1410 offset += sprintf(buf + offset,
1411 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1412 rulla->vcc ? rulla->vcc->vpi : 0,
1413 rulla->vcc ? rulla->vcc->vci : 0,
1414 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1415 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1416 rulla->last_used,
1417 rulla->timestamp, rulla->no_tries);
1418 offset += sprintf(buf + offset,
1419 "Flags:%x, Packets_flooded:%x, Status: %s ",
1420 rulla->flags, rulla->packets_flooded,
1421 get_status_string(rulla->status));
1422 pr_info("%s\n", buf);
1423 }
1424
1425 if (!hlist_empty(&priv->lec_arp_empty_ones))
1426 pr_info("Empty ones\n");
1427 hlist_for_each_entry(rulla, &priv->lec_arp_empty_ones, next) {
1428 offset = 0;
1429 offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr);
1430 offset += sprintf(buf + offset, " Atm:");
1431 for (j = 0; j < ATM_ESA_LEN; j++) {
1432 offset += sprintf(buf + offset, "%2.2x ",
1433 rulla->atm_addr[j] & 0xff);
1434 }
1435 offset += sprintf(buf + offset,
1436 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1437 rulla->vcc ? rulla->vcc->vpi : 0,
1438 rulla->vcc ? rulla->vcc->vci : 0,
1439 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1440 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1441 rulla->last_used,
1442 rulla->timestamp, rulla->no_tries);
1443 offset += sprintf(buf + offset,
1444 "Flags:%x, Packets_flooded:%x, Status: %s ",
1445 rulla->flags, rulla->packets_flooded,
1446 get_status_string(rulla->status));
1447 pr_info("%s", buf);
1448 }
1449
1450 if (!hlist_empty(&priv->mcast_fwds))
1451 pr_info("Multicast Forward VCCs\n");
1452 hlist_for_each_entry(rulla, &priv->mcast_fwds, next) {
1453 offset = 0;
1454 offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr);
1455 offset += sprintf(buf + offset, " Atm:");
1456 for (j = 0; j < ATM_ESA_LEN; j++) {
1457 offset += sprintf(buf + offset, "%2.2x ",
1458 rulla->atm_addr[j] & 0xff);
1459 }
1460 offset += sprintf(buf + offset,
1461 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1462 rulla->vcc ? rulla->vcc->vpi : 0,
1463 rulla->vcc ? rulla->vcc->vci : 0,
1464 rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1465 rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1466 rulla->last_used,
1467 rulla->timestamp, rulla->no_tries);
1468 offset += sprintf(buf + offset,
1469 "Flags:%x, Packets_flooded:%x, Status: %s ",
1470 rulla->flags, rulla->packets_flooded,
1471 get_status_string(rulla->status));
1472 pr_info("%s\n", buf);
1473 }
1474
1475}
1476#else
1477#define dump_arp_table(priv) do { } while (0)
1478#endif
1479
1480
1481
1482
1483static void lec_arp_destroy(struct lec_priv *priv)
1484{
1485 unsigned long flags;
1486 struct hlist_node *next;
1487 struct lec_arp_table *entry;
1488 int i;
1489
1490 cancel_delayed_work_sync(&priv->lec_arp_work);
1491
1492
1493
1494
1495
1496 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1497 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1498 hlist_for_each_entry_safe(entry, next,
1499 &priv->lec_arp_tables[i], next) {
1500 lec_arp_remove(priv, entry);
1501 lec_arp_put(entry);
1502 }
1503 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1504 }
1505
1506 hlist_for_each_entry_safe(entry, next,
1507 &priv->lec_arp_empty_ones, next) {
1508 del_timer_sync(&entry->timer);
1509 lec_arp_clear_vccs(entry);
1510 hlist_del(&entry->next);
1511 lec_arp_put(entry);
1512 }
1513 INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1514
1515 hlist_for_each_entry_safe(entry, next,
1516 &priv->lec_no_forward, next) {
1517 del_timer_sync(&entry->timer);
1518 lec_arp_clear_vccs(entry);
1519 hlist_del(&entry->next);
1520 lec_arp_put(entry);
1521 }
1522 INIT_HLIST_HEAD(&priv->lec_no_forward);
1523
1524 hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) {
1525
1526 lec_arp_clear_vccs(entry);
1527 hlist_del(&entry->next);
1528 lec_arp_put(entry);
1529 }
1530 INIT_HLIST_HEAD(&priv->mcast_fwds);
1531 priv->mcast_vcc = NULL;
1532 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1533}
1534
1535
1536
1537
1538static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
1539 const unsigned char *mac_addr)
1540{
1541 struct hlist_head *head;
1542 struct lec_arp_table *entry;
1543
1544 pr_debug("%pM\n", mac_addr);
1545
1546 head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])];
1547 hlist_for_each_entry(entry, head, next) {
1548 if (ether_addr_equal(mac_addr, entry->mac_addr))
1549 return entry;
1550 }
1551 return NULL;
1552}
1553
1554static struct lec_arp_table *make_entry(struct lec_priv *priv,
1555 const unsigned char *mac_addr)
1556{
1557 struct lec_arp_table *to_return;
1558
1559 to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC);
1560 if (!to_return) {
1561 pr_info("LEC: Arp entry kmalloc failed\n");
1562 return NULL;
1563 }
1564 ether_addr_copy(to_return->mac_addr, mac_addr);
1565 INIT_HLIST_NODE(&to_return->next);
1566 timer_setup(&to_return->timer, lec_arp_expire_arp, 0);
1567 to_return->last_used = jiffies;
1568 to_return->priv = priv;
1569 skb_queue_head_init(&to_return->tx_wait);
1570 refcount_set(&to_return->usage, 1);
1571 return to_return;
1572}
1573
1574
1575static void lec_arp_expire_arp(struct timer_list *t)
1576{
1577 struct lec_arp_table *entry;
1578
1579 entry = from_timer(entry, t, timer);
1580
1581 pr_debug("\n");
1582 if (entry->status == ESI_ARP_PENDING) {
1583 if (entry->no_tries <= entry->priv->max_retry_count) {
1584 if (entry->is_rdesc)
1585 send_to_lecd(entry->priv, l_rdesc_arp_xmt,
1586 entry->mac_addr, NULL, NULL);
1587 else
1588 send_to_lecd(entry->priv, l_arp_xmt,
1589 entry->mac_addr, NULL, NULL);
1590 entry->no_tries++;
1591 }
1592 mod_timer(&entry->timer, jiffies + (1 * HZ));
1593 }
1594}
1595
1596
1597static void lec_arp_expire_vcc(struct timer_list *t)
1598{
1599 unsigned long flags;
1600 struct lec_arp_table *to_remove = from_timer(to_remove, t, timer);
1601 struct lec_priv *priv = to_remove->priv;
1602
1603 del_timer(&to_remove->timer);
1604
1605 pr_debug("%p %p: vpi:%d vci:%d\n",
1606 to_remove, priv,
1607 to_remove->vcc ? to_remove->recv_vcc->vpi : 0,
1608 to_remove->vcc ? to_remove->recv_vcc->vci : 0);
1609
1610 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1611 hlist_del(&to_remove->next);
1612 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1613
1614 lec_arp_clear_vccs(to_remove);
1615 lec_arp_put(to_remove);
1616}
1617
1618static bool __lec_arp_check_expire(struct lec_arp_table *entry,
1619 unsigned long now,
1620 struct lec_priv *priv)
1621{
1622 unsigned long time_to_check;
1623
1624 if ((entry->flags) & LEC_REMOTE_FLAG && priv->topology_change)
1625 time_to_check = priv->forward_delay_time;
1626 else
1627 time_to_check = priv->aging_time;
1628
1629 pr_debug("About to expire: %lx - %lx > %lx\n",
1630 now, entry->last_used, time_to_check);
1631 if (time_after(now, entry->last_used + time_to_check) &&
1632 !(entry->flags & LEC_PERMANENT_FLAG) &&
1633 !(entry->mac_addr[0] & 0x01)) {
1634
1635 pr_debug("Entry timed out\n");
1636 lec_arp_remove(priv, entry);
1637 lec_arp_put(entry);
1638 } else {
1639
1640 if ((entry->status == ESI_VC_PENDING ||
1641 entry->status == ESI_ARP_PENDING) &&
1642 time_after_eq(now, entry->timestamp +
1643 priv->max_unknown_frame_time)) {
1644 entry->timestamp = jiffies;
1645 entry->packets_flooded = 0;
1646 if (entry->status == ESI_VC_PENDING)
1647 send_to_lecd(priv, l_svc_setup,
1648 entry->mac_addr,
1649 entry->atm_addr,
1650 NULL);
1651 }
1652 if (entry->status == ESI_FLUSH_PENDING &&
1653 time_after_eq(now, entry->timestamp +
1654 priv->path_switching_delay)) {
1655 lec_arp_hold(entry);
1656 return true;
1657 }
1658 }
1659
1660 return false;
1661}
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678static void lec_arp_check_expire(struct work_struct *work)
1679{
1680 unsigned long flags;
1681 struct lec_priv *priv =
1682 container_of(work, struct lec_priv, lec_arp_work.work);
1683 struct hlist_node *next;
1684 struct lec_arp_table *entry;
1685 unsigned long now;
1686 int i;
1687
1688 pr_debug("%p\n", priv);
1689 now = jiffies;
1690restart:
1691 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1692 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1693 hlist_for_each_entry_safe(entry, next,
1694 &priv->lec_arp_tables[i], next) {
1695 if (__lec_arp_check_expire(entry, now, priv)) {
1696 struct sk_buff *skb;
1697 struct atm_vcc *vcc = entry->vcc;
1698
1699 spin_unlock_irqrestore(&priv->lec_arp_lock,
1700 flags);
1701 while ((skb = skb_dequeue(&entry->tx_wait)))
1702 lec_send(vcc, skb);
1703 entry->last_used = jiffies;
1704 entry->status = ESI_FORWARD_DIRECT;
1705 lec_arp_put(entry);
1706
1707 goto restart;
1708 }
1709 }
1710 }
1711 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1712
1713 schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1714}
1715
1716
1717
1718
1719
1720static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
1721 const unsigned char *mac_to_find,
1722 int is_rdesc,
1723 struct lec_arp_table **ret_entry)
1724{
1725 unsigned long flags;
1726 struct lec_arp_table *entry;
1727 struct atm_vcc *found;
1728
1729 if (mac_to_find[0] & 0x01) {
1730 switch (priv->lane_version) {
1731 case 1:
1732 return priv->mcast_vcc;
1733 case 2:
1734 if (ether_addr_equal(mac_to_find, bus_mac))
1735 return priv->mcast_vcc;
1736 break;
1737 default:
1738 break;
1739 }
1740 }
1741
1742 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1743 entry = lec_arp_find(priv, mac_to_find);
1744
1745 if (entry) {
1746 if (entry->status == ESI_FORWARD_DIRECT) {
1747
1748 entry->last_used = jiffies;
1749 lec_arp_hold(entry);
1750 *ret_entry = entry;
1751 found = entry->vcc;
1752 goto out;
1753 }
1754
1755
1756
1757
1758 if (entry->status == ESI_ARP_PENDING)
1759 entry->no_tries = 0;
1760
1761
1762
1763
1764
1765
1766 if (entry->status != ESI_FLUSH_PENDING &&
1767 entry->packets_flooded <
1768 priv->maximum_unknown_frame_count) {
1769 entry->packets_flooded++;
1770 pr_debug("Flooding..\n");
1771 found = priv->mcast_vcc;
1772 goto out;
1773 }
1774
1775
1776
1777
1778
1779 lec_arp_hold(entry);
1780 *ret_entry = entry;
1781 pr_debug("entry->status %d entry->vcc %p\n", entry->status,
1782 entry->vcc);
1783 found = NULL;
1784 } else {
1785
1786 entry = make_entry(priv, mac_to_find);
1787 pr_debug("Making entry\n");
1788 if (!entry) {
1789 found = priv->mcast_vcc;
1790 goto out;
1791 }
1792 lec_arp_add(priv, entry);
1793
1794 entry->packets_flooded = 1;
1795 entry->status = ESI_ARP_PENDING;
1796 entry->no_tries = 1;
1797 entry->last_used = entry->timestamp = jiffies;
1798 entry->is_rdesc = is_rdesc;
1799 if (entry->is_rdesc)
1800 send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL,
1801 NULL);
1802 else
1803 send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL);
1804 entry->timer.expires = jiffies + (1 * HZ);
1805 entry->timer.function = lec_arp_expire_arp;
1806 add_timer(&entry->timer);
1807 found = priv->mcast_vcc;
1808 }
1809
1810out:
1811 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1812 return found;
1813}
1814
1815static int
1816lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr,
1817 unsigned long permanent)
1818{
1819 unsigned long flags;
1820 struct hlist_node *next;
1821 struct lec_arp_table *entry;
1822 int i;
1823
1824 pr_debug("\n");
1825 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1826 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1827 hlist_for_each_entry_safe(entry, next,
1828 &priv->lec_arp_tables[i], next) {
1829 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN) &&
1830 (permanent ||
1831 !(entry->flags & LEC_PERMANENT_FLAG))) {
1832 lec_arp_remove(priv, entry);
1833 lec_arp_put(entry);
1834 }
1835 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1836 return 0;
1837 }
1838 }
1839 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1840 return -1;
1841}
1842
1843
1844
1845
1846static void
1847lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr,
1848 const unsigned char *atm_addr, unsigned long remoteflag,
1849 unsigned int targetless_le_arp)
1850{
1851 unsigned long flags;
1852 struct hlist_node *next;
1853 struct lec_arp_table *entry, *tmp;
1854 int i;
1855
1856 pr_debug("%smac:%pM\n",
1857 (targetless_le_arp) ? "targetless " : "", mac_addr);
1858
1859 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1860 entry = lec_arp_find(priv, mac_addr);
1861 if (entry == NULL && targetless_le_arp)
1862 goto out;
1863
1864
1865
1866 if (!hlist_empty(&priv->lec_arp_empty_ones)) {
1867 hlist_for_each_entry_safe(entry, next,
1868 &priv->lec_arp_empty_ones, next) {
1869 if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) {
1870 hlist_del(&entry->next);
1871 del_timer(&entry->timer);
1872 tmp = lec_arp_find(priv, mac_addr);
1873 if (tmp) {
1874 del_timer(&tmp->timer);
1875 tmp->status = ESI_FORWARD_DIRECT;
1876 memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN);
1877 tmp->vcc = entry->vcc;
1878 tmp->old_push = entry->old_push;
1879 tmp->last_used = jiffies;
1880 del_timer(&entry->timer);
1881 lec_arp_put(entry);
1882 entry = tmp;
1883 } else {
1884 entry->status = ESI_FORWARD_DIRECT;
1885 ether_addr_copy(entry->mac_addr,
1886 mac_addr);
1887 entry->last_used = jiffies;
1888 lec_arp_add(priv, entry);
1889 }
1890 if (remoteflag)
1891 entry->flags |= LEC_REMOTE_FLAG;
1892 else
1893 entry->flags &= ~LEC_REMOTE_FLAG;
1894 pr_debug("After update\n");
1895 dump_arp_table(priv);
1896 goto out;
1897 }
1898 }
1899 }
1900
1901 entry = lec_arp_find(priv, mac_addr);
1902 if (!entry) {
1903 entry = make_entry(priv, mac_addr);
1904 if (!entry)
1905 goto out;
1906 entry->status = ESI_UNKNOWN;
1907 lec_arp_add(priv, entry);
1908
1909 }
1910 memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN);
1911 del_timer(&entry->timer);
1912 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1913 hlist_for_each_entry(tmp,
1914 &priv->lec_arp_tables[i], next) {
1915 if (entry != tmp &&
1916 !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) {
1917
1918 if (tmp->status > ESI_VC_PENDING) {
1919
1920
1921
1922
1923 entry->vcc = tmp->vcc;
1924 entry->old_push = tmp->old_push;
1925 }
1926 entry->status = tmp->status;
1927 break;
1928 }
1929 }
1930 }
1931 if (remoteflag)
1932 entry->flags |= LEC_REMOTE_FLAG;
1933 else
1934 entry->flags &= ~LEC_REMOTE_FLAG;
1935 if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) {
1936 entry->status = ESI_VC_PENDING;
1937 send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL);
1938 }
1939 pr_debug("After update2\n");
1940 dump_arp_table(priv);
1941out:
1942 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1943}
1944
1945
1946
1947
1948static void
1949lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data,
1950 struct atm_vcc *vcc,
1951 void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb))
1952{
1953 unsigned long flags;
1954 struct lec_arp_table *entry;
1955 int i, found_entry = 0;
1956
1957 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1958
1959 if (ioc_data->receive == 2) {
1960 pr_debug("LEC_ARP: Attaching mcast forward\n");
1961#if 0
1962 entry = lec_arp_find(priv, bus_mac);
1963 if (!entry) {
1964 pr_info("LEC_ARP: Multicast entry not found!\n");
1965 goto out;
1966 }
1967 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
1968 entry->recv_vcc = vcc;
1969 entry->old_recv_push = old_push;
1970#endif
1971 entry = make_entry(priv, bus_mac);
1972 if (entry == NULL)
1973 goto out;
1974 del_timer(&entry->timer);
1975 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
1976 entry->recv_vcc = vcc;
1977 entry->old_recv_push = old_push;
1978 hlist_add_head(&entry->next, &priv->mcast_fwds);
1979 goto out;
1980 } else if (ioc_data->receive == 1) {
1981
1982
1983
1984
1985 pr_debug("LEC_ARP:Attaching data direct, not default: %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",
1986 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
1987 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
1988 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
1989 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
1990 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
1991 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
1992 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
1993 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
1994 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
1995 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
1996 entry = make_entry(priv, bus_mac);
1997 if (entry == NULL)
1998 goto out;
1999 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2000 eth_zero_addr(entry->mac_addr);
2001 entry->recv_vcc = vcc;
2002 entry->old_recv_push = old_push;
2003 entry->status = ESI_UNKNOWN;
2004 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2005 entry->timer.function = lec_arp_expire_vcc;
2006 hlist_add_head(&entry->next, &priv->lec_no_forward);
2007 add_timer(&entry->timer);
2008 dump_arp_table(priv);
2009 goto out;
2010 }
2011 pr_debug("LEC_ARP:Attaching data direct, default: %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",
2012 ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2013 ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2014 ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2015 ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2016 ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2017 ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2018 ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2019 ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2020 ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2021 ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2022 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2023 hlist_for_each_entry(entry,
2024 &priv->lec_arp_tables[i], next) {
2025 if (memcmp
2026 (ioc_data->atm_addr, entry->atm_addr,
2027 ATM_ESA_LEN) == 0) {
2028 pr_debug("LEC_ARP: Attaching data direct\n");
2029 pr_debug("Currently -> Vcc: %d, Rvcc:%d\n",
2030 entry->vcc ? entry->vcc->vci : 0,
2031 entry->recv_vcc ? entry->recv_vcc->
2032 vci : 0);
2033 found_entry = 1;
2034 del_timer(&entry->timer);
2035 entry->vcc = vcc;
2036 entry->old_push = old_push;
2037 if (entry->status == ESI_VC_PENDING) {
2038 if (priv->maximum_unknown_frame_count
2039 == 0)
2040 entry->status =
2041 ESI_FORWARD_DIRECT;
2042 else {
2043 entry->timestamp = jiffies;
2044 entry->status =
2045 ESI_FLUSH_PENDING;
2046#if 0
2047 send_to_lecd(priv, l_flush_xmt,
2048 NULL,
2049 entry->atm_addr,
2050 NULL);
2051#endif
2052 }
2053 } else {
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065 ;
2066 }
2067 }
2068 }
2069 }
2070 if (found_entry) {
2071 pr_debug("After vcc was added\n");
2072 dump_arp_table(priv);
2073 goto out;
2074 }
2075
2076
2077
2078
2079 entry = make_entry(priv, bus_mac);
2080 if (!entry)
2081 goto out;
2082 entry->vcc = vcc;
2083 entry->old_push = old_push;
2084 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2085 eth_zero_addr(entry->mac_addr);
2086 entry->status = ESI_UNKNOWN;
2087 hlist_add_head(&entry->next, &priv->lec_arp_empty_ones);
2088 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2089 entry->timer.function = lec_arp_expire_vcc;
2090 add_timer(&entry->timer);
2091 pr_debug("After vcc was added\n");
2092 dump_arp_table(priv);
2093out:
2094 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2095}
2096
2097static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id)
2098{
2099 unsigned long flags;
2100 struct lec_arp_table *entry;
2101 int i;
2102
2103 pr_debug("%lx\n", tran_id);
2104restart:
2105 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2106 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2107 hlist_for_each_entry(entry,
2108 &priv->lec_arp_tables[i], next) {
2109 if (entry->flush_tran_id == tran_id &&
2110 entry->status == ESI_FLUSH_PENDING) {
2111 struct sk_buff *skb;
2112 struct atm_vcc *vcc = entry->vcc;
2113
2114 lec_arp_hold(entry);
2115 spin_unlock_irqrestore(&priv->lec_arp_lock,
2116 flags);
2117 while ((skb = skb_dequeue(&entry->tx_wait)))
2118 lec_send(vcc, skb);
2119 entry->last_used = jiffies;
2120 entry->status = ESI_FORWARD_DIRECT;
2121 lec_arp_put(entry);
2122 pr_debug("LEC_ARP: Flushed\n");
2123 goto restart;
2124 }
2125 }
2126 }
2127 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2128 dump_arp_table(priv);
2129}
2130
2131static void
2132lec_set_flush_tran_id(struct lec_priv *priv,
2133 const unsigned char *atm_addr, unsigned long tran_id)
2134{
2135 unsigned long flags;
2136 struct lec_arp_table *entry;
2137 int i;
2138
2139 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2140 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
2141 hlist_for_each_entry(entry,
2142 &priv->lec_arp_tables[i], next) {
2143 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) {
2144 entry->flush_tran_id = tran_id;
2145 pr_debug("Set flush transaction id to %lx for %p\n",
2146 tran_id, entry);
2147 }
2148 }
2149 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2150}
2151
2152static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc)
2153{
2154 unsigned long flags;
2155 unsigned char mac_addr[] = {
2156 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
2157 };
2158 struct lec_arp_table *to_add;
2159 struct lec_vcc_priv *vpriv;
2160 int err = 0;
2161
2162 vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL);
2163 if (!vpriv)
2164 return -ENOMEM;
2165 vpriv->xoff = 0;
2166 vpriv->old_pop = vcc->pop;
2167 vcc->user_back = vpriv;
2168 vcc->pop = lec_pop;
2169 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2170 to_add = make_entry(priv, mac_addr);
2171 if (!to_add) {
2172 vcc->pop = vpriv->old_pop;
2173 kfree(vpriv);
2174 err = -ENOMEM;
2175 goto out;
2176 }
2177 memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN);
2178 to_add->status = ESI_FORWARD_DIRECT;
2179 to_add->flags |= LEC_PERMANENT_FLAG;
2180 to_add->vcc = vcc;
2181 to_add->old_push = vcc->push;
2182 vcc->push = lec_push;
2183 priv->mcast_vcc = vcc;
2184 lec_arp_add(priv, to_add);
2185out:
2186 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2187 return err;
2188}
2189
2190static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc)
2191{
2192 unsigned long flags;
2193 struct hlist_node *next;
2194 struct lec_arp_table *entry;
2195 int i;
2196
2197 pr_debug("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci);
2198 dump_arp_table(priv);
2199
2200 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2201
2202 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2203 hlist_for_each_entry_safe(entry, next,
2204 &priv->lec_arp_tables[i], next) {
2205 if (vcc == entry->vcc) {
2206 lec_arp_remove(priv, entry);
2207 lec_arp_put(entry);
2208 if (priv->mcast_vcc == vcc)
2209 priv->mcast_vcc = NULL;
2210 }
2211 }
2212 }
2213
2214 hlist_for_each_entry_safe(entry, next,
2215 &priv->lec_arp_empty_ones, next) {
2216 if (entry->vcc == vcc) {
2217 lec_arp_clear_vccs(entry);
2218 del_timer(&entry->timer);
2219 hlist_del(&entry->next);
2220 lec_arp_put(entry);
2221 }
2222 }
2223
2224 hlist_for_each_entry_safe(entry, next,
2225 &priv->lec_no_forward, next) {
2226 if (entry->recv_vcc == vcc) {
2227 lec_arp_clear_vccs(entry);
2228 del_timer(&entry->timer);
2229 hlist_del(&entry->next);
2230 lec_arp_put(entry);
2231 }
2232 }
2233
2234 hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) {
2235 if (entry->recv_vcc == vcc) {
2236 lec_arp_clear_vccs(entry);
2237
2238 hlist_del(&entry->next);
2239 lec_arp_put(entry);
2240 }
2241 }
2242
2243 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2244 dump_arp_table(priv);
2245}
2246
2247static void
2248lec_arp_check_empties(struct lec_priv *priv,
2249 struct atm_vcc *vcc, struct sk_buff *skb)
2250{
2251 unsigned long flags;
2252 struct hlist_node *next;
2253 struct lec_arp_table *entry, *tmp;
2254 struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data;
2255 unsigned char *src = hdr->h_source;
2256
2257 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2258 hlist_for_each_entry_safe(entry, next,
2259 &priv->lec_arp_empty_ones, next) {
2260 if (vcc == entry->vcc) {
2261 del_timer(&entry->timer);
2262 ether_addr_copy(entry->mac_addr, src);
2263 entry->status = ESI_FORWARD_DIRECT;
2264 entry->last_used = jiffies;
2265
2266 tmp = lec_arp_find(priv, src);
2267 if (tmp) {
2268 lec_arp_remove(priv, tmp);
2269 lec_arp_put(tmp);
2270 }
2271 hlist_del(&entry->next);
2272 lec_arp_add(priv, entry);
2273 goto out;
2274 }
2275 }
2276 pr_debug("LEC_ARP: Arp_check_empties: entry not found!\n");
2277out:
2278 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2279}
2280
2281MODULE_LICENSE("GPL");
2282