e2d800d818e357c058b867e7ccd9d1af5c231087
[linux-2.6.git] / net / atm / lec.c
1 /*
2  * lec.c: Lan Emulation driver
3  *
4  * Marko Kiiskila <mkiiskila@yahoo.com>
5  */
6
7 #include <linux/kernel.h>
8 #include <linux/bitops.h>
9 #include <linux/capability.h>
10
11 /* We are ethernet device */
12 #include <linux/if_ether.h>
13 #include <linux/netdevice.h>
14 #include <linux/etherdevice.h>
15 #include <net/sock.h>
16 #include <linux/skbuff.h>
17 #include <linux/ip.h>
18 #include <asm/byteorder.h>
19 #include <asm/uaccess.h>
20 #include <net/arp.h>
21 #include <net/dst.h>
22 #include <linux/proc_fs.h>
23 #include <linux/spinlock.h>
24 #include <linux/seq_file.h>
25
26 /* TokenRing if needed */
27 #ifdef CONFIG_TR
28 #include <linux/trdevice.h>
29 #endif
30
31 /* And atm device */
32 #include <linux/atmdev.h>
33 #include <linux/atmlec.h>
34
35 /* Proxy LEC knows about bridging */
36 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
37 #include <linux/if_bridge.h>
38 #include "../bridge/br_private.h"
39
40 static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 };
41 #endif
42
43 /* Modular too */
44 #include <linux/module.h>
45 #include <linux/init.h>
46
47 #include "lec.h"
48 #include "lec_arpc.h"
49 #include "resources.h"
50
51 #define DUMP_PACKETS 0          /*
52                                  * 0 = None,
53                                  * 1 = 30 first bytes
54                                  * 2 = Whole packet
55                                  */
56
57 #define LEC_UNRES_QUE_LEN 8     /*
58                                  * number of tx packets to queue for a
59                                  * single destination while waiting for SVC
60                                  */
61
62 static int lec_open(struct net_device *dev);
63 static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev);
64 static int lec_close(struct net_device *dev);
65 static struct net_device_stats *lec_get_stats(struct net_device *dev);
66 static void lec_init(struct net_device *dev);
67 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
68                                           unsigned char *mac_addr);
69 static int lec_arp_remove(struct lec_priv *priv,
70                           struct lec_arp_table *to_remove);
71 /* LANE2 functions */
72 static void lane2_associate_ind(struct net_device *dev, u8 *mac_address,
73                                 u8 *tlvs, u32 sizeoftlvs);
74 static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force,
75                          u8 **tlvs, u32 *sizeoftlvs);
76 static int lane2_associate_req(struct net_device *dev, u8 *lan_dst,
77                                u8 *tlvs, u32 sizeoftlvs);
78
79 static int lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr,
80                            unsigned long permanent);
81 static void lec_arp_check_empties(struct lec_priv *priv,
82                                   struct atm_vcc *vcc, struct sk_buff *skb);
83 static void lec_arp_destroy(struct lec_priv *priv);
84 static void lec_arp_init(struct lec_priv *priv);
85 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
86                                        unsigned char *mac_to_find,
87                                        int is_rdesc,
88                                        struct lec_arp_table **ret_entry);
89 static void lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr,
90                            unsigned char *atm_addr, unsigned long remoteflag,
91                            unsigned int targetless_le_arp);
92 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id);
93 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc);
94 static void lec_set_flush_tran_id(struct lec_priv *priv,
95                                   unsigned char *atm_addr,
96                                   unsigned long tran_id);
97 static void lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data,
98                           struct atm_vcc *vcc,
99                           void (*old_push) (struct atm_vcc *vcc,
100                                             struct sk_buff *skb));
101 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc);
102
103 /* must be done under lec_arp_lock */
104 static inline void lec_arp_hold(struct lec_arp_table *entry)
105 {
106         atomic_inc(&entry->usage);
107 }
108
109 static inline void lec_arp_put(struct lec_arp_table *entry)
110 {
111         if (atomic_dec_and_test(&entry->usage))
112                 kfree(entry);
113 }
114
115
116 static struct lane2_ops lane2_ops = {
117         lane2_resolve,          /* resolve,             spec 3.1.3 */
118         lane2_associate_req,    /* associate_req,       spec 3.1.4 */
119         NULL                    /* associate indicator, spec 3.1.5 */
120 };
121
122 static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
123
124 /* Device structures */
125 static struct net_device *dev_lec[MAX_LEC_ITF];
126
127 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
128 static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev)
129 {
130         struct ethhdr *eth;
131         char *buff;
132         struct lec_priv *priv;
133
134         /*
135          * Check if this is a BPDU. If so, ask zeppelin to send
136          * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit
137          * as the Config BPDU has
138          */
139         eth = (struct ethhdr *)skb->data;
140         buff = skb->data + skb->dev->hard_header_len;
141         if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) {
142                 struct sock *sk;
143                 struct sk_buff *skb2;
144                 struct atmlec_msg *mesg;
145
146                 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
147                 if (skb2 == NULL)
148                         return;
149                 skb2->len = sizeof(struct atmlec_msg);
150                 mesg = (struct atmlec_msg *)skb2->data;
151                 mesg->type = l_topology_change;
152                 buff += 4;
153                 mesg->content.normal.flag = *buff & 0x01;       /* 0x01 is topology change */
154
155                 priv = (struct lec_priv *)dev->priv;
156                 atm_force_charge(priv->lecd, skb2->truesize);
157                 sk = sk_atm(priv->lecd);
158                 skb_queue_tail(&sk->sk_receive_queue, skb2);
159                 sk->sk_data_ready(sk, skb2->len);
160         }
161
162         return;
163 }
164 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
165
166 /*
167  * Modelled after tr_type_trans
168  * All multicast and ARE or STE frames go to BUS.
169  * Non source routed frames go by destination address.
170  * Last hop source routed frames go by destination address.
171  * Not last hop source routed frames go by _next_ route descriptor.
172  * Returns pointer to destination MAC address or fills in rdesc
173  * and returns NULL.
174  */
175 #ifdef CONFIG_TR
176 static unsigned char *get_tr_dst(unsigned char *packet, unsigned char *rdesc)
177 {
178         struct trh_hdr *trh;
179         unsigned int riflen, num_rdsc;
180
181         trh = (struct trh_hdr *)packet;
182         if (trh->daddr[0] & (uint8_t) 0x80)
183                 return bus_mac; /* multicast */
184
185         if (trh->saddr[0] & TR_RII) {
186                 riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8;
187                 if ((ntohs(trh->rcf) >> 13) != 0)
188                         return bus_mac; /* ARE or STE */
189         } else
190                 return trh->daddr;      /* not source routed */
191
192         if (riflen < 6)
193                 return trh->daddr;      /* last hop, source routed */
194
195         /* riflen is 6 or more, packet has more than one route descriptor */
196         num_rdsc = (riflen / 2) - 1;
197         memset(rdesc, 0, ETH_ALEN);
198         /* offset 4 comes from LAN destination field in LE control frames */
199         if (trh->rcf & htons((uint16_t) TR_RCF_DIR_BIT))
200                 memcpy(&rdesc[4], &trh->rseg[num_rdsc - 2], sizeof(__be16));
201         else {
202                 memcpy(&rdesc[4], &trh->rseg[1], sizeof(__be16));
203                 rdesc[5] = ((ntohs(trh->rseg[0]) & 0x000f) | (rdesc[5] & 0xf0));
204         }
205
206         return NULL;
207 }
208 #endif /* CONFIG_TR */
209
210 /*
211  * Open/initialize the netdevice. This is called (in the current kernel)
212  * sometime after booting when the 'ifconfig' program is run.
213  *
214  * This routine should set everything up anew at each open, even
215  * registers that "should" only need to be set once at boot, so that
216  * there is non-reboot way to recover if something goes wrong.
217  */
218
219 static int lec_open(struct net_device *dev)
220 {
221         struct lec_priv *priv = (struct lec_priv *)dev->priv;
222
223         netif_start_queue(dev);
224         memset(&priv->stats, 0, sizeof(struct net_device_stats));
225
226         return 0;
227 }
228
229 static __inline__ void
230 lec_send(struct atm_vcc *vcc, struct sk_buff *skb, struct lec_priv *priv)
231 {
232         ATM_SKB(skb)->vcc = vcc;
233         ATM_SKB(skb)->atm_options = vcc->atm_options;
234
235         atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
236         if (vcc->send(vcc, skb) < 0) {
237                 priv->stats.tx_dropped++;
238                 return;
239         }
240
241         priv->stats.tx_packets++;
242         priv->stats.tx_bytes += skb->len;
243 }
244
245 static void lec_tx_timeout(struct net_device *dev)
246 {
247         printk(KERN_INFO "%s: tx timeout\n", dev->name);
248         dev->trans_start = jiffies;
249         netif_wake_queue(dev);
250 }
251
252 static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev)
253 {
254         struct sk_buff *skb2;
255         struct lec_priv *priv = (struct lec_priv *)dev->priv;
256         struct lecdatahdr_8023 *lec_h;
257         struct atm_vcc *vcc;
258         struct lec_arp_table *entry;
259         unsigned char *dst;
260         int min_frame_size;
261 #ifdef CONFIG_TR
262         unsigned char rdesc[ETH_ALEN];  /* Token Ring route descriptor */
263 #endif
264         int is_rdesc;
265 #if DUMP_PACKETS > 0
266         char buf[300];
267         int i = 0;
268 #endif /* DUMP_PACKETS >0 */
269         DECLARE_MAC_BUF(mac);
270
271         pr_debug("lec_start_xmit called\n");
272         if (!priv->lecd) {
273                 printk("%s:No lecd attached\n", dev->name);
274                 priv->stats.tx_errors++;
275                 netif_stop_queue(dev);
276                 return -EUNATCH;
277         }
278
279         pr_debug("skbuff head:%lx data:%lx tail:%lx end:%lx\n",
280                 (long)skb->head, (long)skb->data, (long)skb_tail_pointer(skb),
281                 (long)skb_end_pointer(skb));
282 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
283         if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0)
284                 lec_handle_bridge(skb, dev);
285 #endif
286
287         /* Make sure we have room for lec_id */
288         if (skb_headroom(skb) < 2) {
289
290                 pr_debug("lec_start_xmit: reallocating skb\n");
291                 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
292                 kfree_skb(skb);
293                 if (skb2 == NULL)
294                         return 0;
295                 skb = skb2;
296         }
297         skb_push(skb, 2);
298
299         /* Put le header to place, works for TokenRing too */
300         lec_h = (struct lecdatahdr_8023 *)skb->data;
301         lec_h->le_header = htons(priv->lecid);
302
303 #ifdef CONFIG_TR
304         /*
305          * Ugly. Use this to realign Token Ring packets for
306          * e.g. PCA-200E driver.
307          */
308         if (priv->is_trdev) {
309                 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
310                 kfree_skb(skb);
311                 if (skb2 == NULL)
312                         return 0;
313                 skb = skb2;
314         }
315 #endif
316
317 #if DUMP_PACKETS > 0
318         printk("%s: send datalen:%ld lecid:%4.4x\n", dev->name,
319                skb->len, priv->lecid);
320 #if DUMP_PACKETS >= 2
321         for (i = 0; i < skb->len && i < 99; i++) {
322                 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
323         }
324 #elif DUMP_PACKETS >= 1
325         for (i = 0; i < skb->len && i < 30; i++) {
326                 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
327         }
328 #endif /* DUMP_PACKETS >= 1 */
329         if (i == skb->len)
330                 printk("%s\n", buf);
331         else
332                 printk("%s...\n", buf);
333 #endif /* DUMP_PACKETS > 0 */
334
335         /* Minimum ethernet-frame size */
336 #ifdef CONFIG_TR
337         if (priv->is_trdev)
338                 min_frame_size = LEC_MINIMUM_8025_SIZE;
339         else
340 #endif
341                 min_frame_size = LEC_MINIMUM_8023_SIZE;
342         if (skb->len < min_frame_size) {
343                 if ((skb->len + skb_tailroom(skb)) < min_frame_size) {
344                         skb2 = skb_copy_expand(skb, 0,
345                                                min_frame_size - skb->truesize,
346                                                GFP_ATOMIC);
347                         dev_kfree_skb(skb);
348                         if (skb2 == NULL) {
349                                 priv->stats.tx_dropped++;
350                                 return 0;
351                         }
352                         skb = skb2;
353                 }
354                 skb_put(skb, min_frame_size - skb->len);
355         }
356
357         /* Send to right vcc */
358         is_rdesc = 0;
359         dst = lec_h->h_dest;
360 #ifdef CONFIG_TR
361         if (priv->is_trdev) {
362                 dst = get_tr_dst(skb->data + 2, rdesc);
363                 if (dst == NULL) {
364                         dst = rdesc;
365                         is_rdesc = 1;
366                 }
367         }
368 #endif
369         entry = NULL;
370         vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry);
371         pr_debug("%s:vcc:%p vcc_flags:%lx, entry:%p\n", dev->name,
372                 vcc, vcc ? vcc->flags : 0, entry);
373         if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) {
374                 if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) {
375                         pr_debug("%s:lec_start_xmit: queuing packet, ",
376                                 dev->name);
377                         pr_debug("MAC address %s\n",
378                                  print_mac(mac, lec_h->h_dest));
379                         skb_queue_tail(&entry->tx_wait, skb);
380                 } else {
381                         pr_debug
382                             ("%s:lec_start_xmit: tx queue full or no arp entry, dropping, ",
383                              dev->name);
384                         pr_debug("MAC address %s\n",
385                                  print_mac(mac, lec_h->h_dest));
386                         priv->stats.tx_dropped++;
387                         dev_kfree_skb(skb);
388                 }
389                 goto out;
390         }
391 #if DUMP_PACKETS > 0
392         printk("%s:sending to vpi:%d vci:%d\n", dev->name, vcc->vpi, vcc->vci);
393 #endif /* DUMP_PACKETS > 0 */
394
395         while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) {
396                 pr_debug("lec.c: emptying tx queue, ");
397                 pr_debug("MAC address %s\n",
398                          print_mac(mac, lec_h->h_dest));
399                 lec_send(vcc, skb2, priv);
400         }
401
402         lec_send(vcc, skb, priv);
403
404         if (!atm_may_send(vcc, 0)) {
405                 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
406
407                 vpriv->xoff = 1;
408                 netif_stop_queue(dev);
409
410                 /*
411                  * vcc->pop() might have occurred in between, making
412                  * the vcc usuable again.  Since xmit is serialized,
413                  * this is the only situation we have to re-test.
414                  */
415
416                 if (atm_may_send(vcc, 0))
417                         netif_wake_queue(dev);
418         }
419
420 out:
421         if (entry)
422                 lec_arp_put(entry);
423         dev->trans_start = jiffies;
424         return 0;
425 }
426
427 /* The inverse routine to net_open(). */
428 static int lec_close(struct net_device *dev)
429 {
430         netif_stop_queue(dev);
431         return 0;
432 }
433
434 /*
435  * Get the current statistics.
436  * This may be called with the card open or closed.
437  */
438 static struct net_device_stats *lec_get_stats(struct net_device *dev)
439 {
440         return &((struct lec_priv *)dev->priv)->stats;
441 }
442
443 static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
444 {
445         unsigned long flags;
446         struct net_device *dev = (struct net_device *)vcc->proto_data;
447         struct lec_priv *priv = (struct lec_priv *)dev->priv;
448         struct atmlec_msg *mesg;
449         struct lec_arp_table *entry;
450         int i;
451         char *tmp;              /* FIXME */
452         DECLARE_MAC_BUF(mac);
453
454         atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
455         mesg = (struct atmlec_msg *)skb->data;
456         tmp = skb->data;
457         tmp += sizeof(struct atmlec_msg);
458         pr_debug("%s: msg from zeppelin:%d\n", dev->name, mesg->type);
459         switch (mesg->type) {
460         case l_set_mac_addr:
461                 for (i = 0; i < 6; i++) {
462                         dev->dev_addr[i] = mesg->content.normal.mac_addr[i];
463                 }
464                 break;
465         case l_del_mac_addr:
466                 for (i = 0; i < 6; i++) {
467                         dev->dev_addr[i] = 0;
468                 }
469                 break;
470         case l_addr_delete:
471                 lec_addr_delete(priv, mesg->content.normal.atm_addr,
472                                 mesg->content.normal.flag);
473                 break;
474         case l_topology_change:
475                 priv->topology_change = mesg->content.normal.flag;
476                 break;
477         case l_flush_complete:
478                 lec_flush_complete(priv, mesg->content.normal.flag);
479                 break;
480         case l_narp_req:        /* LANE2: see 7.1.35 in the lane2 spec */
481                 spin_lock_irqsave(&priv->lec_arp_lock, flags);
482                 entry = lec_arp_find(priv, mesg->content.normal.mac_addr);
483                 lec_arp_remove(priv, entry);
484                 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
485
486                 if (mesg->content.normal.no_source_le_narp)
487                         break;
488                 /* FALL THROUGH */
489         case l_arp_update:
490                 lec_arp_update(priv, mesg->content.normal.mac_addr,
491                                mesg->content.normal.atm_addr,
492                                mesg->content.normal.flag,
493                                mesg->content.normal.targetless_le_arp);
494                 pr_debug("lec: in l_arp_update\n");
495                 if (mesg->sizeoftlvs != 0) {    /* LANE2 3.1.5 */
496                         pr_debug("lec: LANE2 3.1.5, got tlvs, size %d\n",
497                                 mesg->sizeoftlvs);
498                         lane2_associate_ind(dev, mesg->content.normal.mac_addr,
499                                             tmp, mesg->sizeoftlvs);
500                 }
501                 break;
502         case l_config:
503                 priv->maximum_unknown_frame_count =
504                     mesg->content.config.maximum_unknown_frame_count;
505                 priv->max_unknown_frame_time =
506                     (mesg->content.config.max_unknown_frame_time * HZ);
507                 priv->max_retry_count = mesg->content.config.max_retry_count;
508                 priv->aging_time = (mesg->content.config.aging_time * HZ);
509                 priv->forward_delay_time =
510                     (mesg->content.config.forward_delay_time * HZ);
511                 priv->arp_response_time =
512                     (mesg->content.config.arp_response_time * HZ);
513                 priv->flush_timeout = (mesg->content.config.flush_timeout * HZ);
514                 priv->path_switching_delay =
515                     (mesg->content.config.path_switching_delay * HZ);
516                 priv->lane_version = mesg->content.config.lane_version; /* LANE2 */
517                 priv->lane2_ops = NULL;
518                 if (priv->lane_version > 1)
519                         priv->lane2_ops = &lane2_ops;
520                 if (dev->change_mtu(dev, mesg->content.config.mtu))
521                         printk("%s: change_mtu to %d failed\n", dev->name,
522                                mesg->content.config.mtu);
523                 priv->is_proxy = mesg->content.config.is_proxy;
524                 break;
525         case l_flush_tran_id:
526                 lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr,
527                                       mesg->content.normal.flag);
528                 break;
529         case l_set_lecid:
530                 priv->lecid =
531                     (unsigned short)(0xffff & mesg->content.normal.flag);
532                 break;
533         case l_should_bridge:
534 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
535                 {
536                         struct net_bridge_fdb_entry *f;
537
538                         pr_debug
539                             ("%s: bridge zeppelin asks about %s\n",
540                              dev->name,
541                              print_mac(mac, mesg->content.proxy.mac_addr));
542
543                         if (br_fdb_get_hook == NULL || dev->br_port == NULL)
544                                 break;
545
546                         f = br_fdb_get_hook(dev->br_port->br,
547                                             mesg->content.proxy.mac_addr);
548                         if (f != NULL && f->dst->dev != dev
549                             && f->dst->state == BR_STATE_FORWARDING) {
550                                 /* hit from bridge table, send LE_ARP_RESPONSE */
551                                 struct sk_buff *skb2;
552                                 struct sock *sk;
553
554                                 pr_debug
555                                     ("%s: entry found, responding to zeppelin\n",
556                                      dev->name);
557                                 skb2 =
558                                     alloc_skb(sizeof(struct atmlec_msg),
559                                               GFP_ATOMIC);
560                                 if (skb2 == NULL) {
561                                         br_fdb_put_hook(f);
562                                         break;
563                                 }
564                                 skb2->len = sizeof(struct atmlec_msg);
565                                 skb_copy_to_linear_data(skb2, mesg,
566                                                         sizeof(*mesg));
567                                 atm_force_charge(priv->lecd, skb2->truesize);
568                                 sk = sk_atm(priv->lecd);
569                                 skb_queue_tail(&sk->sk_receive_queue, skb2);
570                                 sk->sk_data_ready(sk, skb2->len);
571                         }
572                         if (f != NULL)
573                                 br_fdb_put_hook(f);
574                 }
575 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
576                 break;
577         default:
578                 printk("%s: Unknown message type %d\n", dev->name, mesg->type);
579                 dev_kfree_skb(skb);
580                 return -EINVAL;
581         }
582         dev_kfree_skb(skb);
583         return 0;
584 }
585
586 static void lec_atm_close(struct atm_vcc *vcc)
587 {
588         struct sk_buff *skb;
589         struct net_device *dev = (struct net_device *)vcc->proto_data;
590         struct lec_priv *priv = (struct lec_priv *)dev->priv;
591
592         priv->lecd = NULL;
593         /* Do something needful? */
594
595         netif_stop_queue(dev);
596         lec_arp_destroy(priv);
597
598         if (skb_peek(&sk_atm(vcc)->sk_receive_queue))
599                 printk("%s lec_atm_close: closing with messages pending\n",
600                        dev->name);
601         while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue)) != NULL) {
602                 atm_return(vcc, skb->truesize);
603                 dev_kfree_skb(skb);
604         }
605
606         printk("%s: Shut down!\n", dev->name);
607         module_put(THIS_MODULE);
608 }
609
610 static struct atmdev_ops lecdev_ops = {
611         .close = lec_atm_close,
612         .send = lec_atm_send
613 };
614
615 static struct atm_dev lecatm_dev = {
616         .ops = &lecdev_ops,
617         .type = "lec",
618         .number = 999,          /* dummy device number */
619         .lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock)
620 };
621
622 /*
623  * LANE2: new argument struct sk_buff *data contains
624  * the LE_ARP based TLVs introduced in the LANE2 spec
625  */
626 static int
627 send_to_lecd(struct lec_priv *priv, atmlec_msg_type type,
628              unsigned char *mac_addr, unsigned char *atm_addr,
629              struct sk_buff *data)
630 {
631         struct sock *sk;
632         struct sk_buff *skb;
633         struct atmlec_msg *mesg;
634
635         if (!priv || !priv->lecd) {
636                 return -1;
637         }
638         skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
639         if (!skb)
640                 return -1;
641         skb->len = sizeof(struct atmlec_msg);
642         mesg = (struct atmlec_msg *)skb->data;
643         memset(mesg, 0, sizeof(struct atmlec_msg));
644         mesg->type = type;
645         if (data != NULL)
646                 mesg->sizeoftlvs = data->len;
647         if (mac_addr)
648                 memcpy(&mesg->content.normal.mac_addr, mac_addr, ETH_ALEN);
649         else
650                 mesg->content.normal.targetless_le_arp = 1;
651         if (atm_addr)
652                 memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN);
653
654         atm_force_charge(priv->lecd, skb->truesize);
655         sk = sk_atm(priv->lecd);
656         skb_queue_tail(&sk->sk_receive_queue, skb);
657         sk->sk_data_ready(sk, skb->len);
658
659         if (data != NULL) {
660                 pr_debug("lec: about to send %d bytes of data\n", data->len);
661                 atm_force_charge(priv->lecd, data->truesize);
662                 skb_queue_tail(&sk->sk_receive_queue, data);
663                 sk->sk_data_ready(sk, skb->len);
664         }
665
666         return 0;
667 }
668
669 /* shamelessly stolen from drivers/net/net_init.c */
670 static int lec_change_mtu(struct net_device *dev, int new_mtu)
671 {
672         if ((new_mtu < 68) || (new_mtu > 18190))
673                 return -EINVAL;
674         dev->mtu = new_mtu;
675         return 0;
676 }
677
678 static void lec_set_multicast_list(struct net_device *dev)
679 {
680         /*
681          * by default, all multicast frames arrive over the bus.
682          * eventually support selective multicast service
683          */
684         return;
685 }
686
687 static void lec_init(struct net_device *dev)
688 {
689         dev->change_mtu = lec_change_mtu;
690         dev->open = lec_open;
691         dev->stop = lec_close;
692         dev->hard_start_xmit = lec_start_xmit;
693         dev->tx_timeout = lec_tx_timeout;
694
695         dev->get_stats = lec_get_stats;
696         dev->set_multicast_list = lec_set_multicast_list;
697         dev->do_ioctl = NULL;
698         printk("%s: Initialized!\n", dev->name);
699         return;
700 }
701
702 static unsigned char lec_ctrl_magic[] = {
703         0xff,
704         0x00,
705         0x01,
706         0x01
707 };
708
709 #define LEC_DATA_DIRECT_8023  2
710 #define LEC_DATA_DIRECT_8025  3
711
712 static int lec_is_data_direct(struct atm_vcc *vcc)
713 {
714         return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) ||
715                 (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025));
716 }
717
718 static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb)
719 {
720         unsigned long flags;
721         struct net_device *dev = (struct net_device *)vcc->proto_data;
722         struct lec_priv *priv = (struct lec_priv *)dev->priv;
723
724 #if DUMP_PACKETS >0
725         int i = 0;
726         char buf[300];
727
728         printk("%s: lec_push vcc vpi:%d vci:%d\n", dev->name,
729                vcc->vpi, vcc->vci);
730 #endif
731         if (!skb) {
732                 pr_debug("%s: null skb\n", dev->name);
733                 lec_vcc_close(priv, vcc);
734                 return;
735         }
736 #if DUMP_PACKETS > 0
737         printk("%s: rcv datalen:%ld lecid:%4.4x\n", dev->name,
738                skb->len, priv->lecid);
739 #if DUMP_PACKETS >= 2
740         for (i = 0; i < skb->len && i < 99; i++) {
741                 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
742         }
743 #elif DUMP_PACKETS >= 1
744         for (i = 0; i < skb->len && i < 30; i++) {
745                 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
746         }
747 #endif /* DUMP_PACKETS >= 1 */
748         if (i == skb->len)
749                 printk("%s\n", buf);
750         else
751                 printk("%s...\n", buf);
752 #endif /* DUMP_PACKETS > 0 */
753         if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) {        /* Control frame, to daemon */
754                 struct sock *sk = sk_atm(vcc);
755
756                 pr_debug("%s: To daemon\n", dev->name);
757                 skb_queue_tail(&sk->sk_receive_queue, skb);
758                 sk->sk_data_ready(sk, skb->len);
759         } else {                /* Data frame, queue to protocol handlers */
760                 struct lec_arp_table *entry;
761                 unsigned char *src, *dst;
762
763                 atm_return(vcc, skb->truesize);
764                 if (*(__be16 *) skb->data == htons(priv->lecid) ||
765                     !priv->lecd || !(dev->flags & IFF_UP)) {
766                         /*
767                          * Probably looping back, or if lecd is missing,
768                          * lecd has gone down
769                          */
770                         pr_debug("Ignoring frame...\n");
771                         dev_kfree_skb(skb);
772                         return;
773                 }
774 #ifdef CONFIG_TR
775                 if (priv->is_trdev)
776                         dst = ((struct lecdatahdr_8025 *)skb->data)->h_dest;
777                 else
778 #endif
779                         dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest;
780
781                 /*
782                  * If this is a Data Direct VCC, and the VCC does not match
783                  * the LE_ARP cache entry, delete the LE_ARP cache entry.
784                  */
785                 spin_lock_irqsave(&priv->lec_arp_lock, flags);
786                 if (lec_is_data_direct(vcc)) {
787 #ifdef CONFIG_TR
788                         if (priv->is_trdev)
789                                 src =
790                                     ((struct lecdatahdr_8025 *)skb->data)->
791                                     h_source;
792                         else
793 #endif
794                                 src =
795                                     ((struct lecdatahdr_8023 *)skb->data)->
796                                     h_source;
797                         entry = lec_arp_find(priv, src);
798                         if (entry && entry->vcc != vcc) {
799                                 lec_arp_remove(priv, entry);
800                                 lec_arp_put(entry);
801                         }
802                 }
803                 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
804
805                 if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */
806                     !priv->is_proxy &&  /* Proxy wants all the packets */
807                     memcmp(dst, dev->dev_addr, dev->addr_len)) {
808                         dev_kfree_skb(skb);
809                         return;
810                 }
811                 if (!hlist_empty(&priv->lec_arp_empty_ones)) {
812                         lec_arp_check_empties(priv, vcc, skb);
813                 }
814                 skb_pull(skb, 2);       /* skip lec_id */
815 #ifdef CONFIG_TR
816                 if (priv->is_trdev)
817                         skb->protocol = tr_type_trans(skb, dev);
818                 else
819 #endif
820                         skb->protocol = eth_type_trans(skb, dev);
821                 priv->stats.rx_packets++;
822                 priv->stats.rx_bytes += skb->len;
823                 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
824                 netif_rx(skb);
825         }
826 }
827
828 static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb)
829 {
830         struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
831         struct net_device *dev = skb->dev;
832
833         if (vpriv == NULL) {
834                 printk("lec_pop(): vpriv = NULL!?!?!?\n");
835                 return;
836         }
837
838         vpriv->old_pop(vcc, skb);
839
840         if (vpriv->xoff && atm_may_send(vcc, 0)) {
841                 vpriv->xoff = 0;
842                 if (netif_running(dev) && netif_queue_stopped(dev))
843                         netif_wake_queue(dev);
844         }
845 }
846
847 static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg)
848 {
849         struct lec_vcc_priv *vpriv;
850         int bytes_left;
851         struct atmlec_ioc ioc_data;
852
853         /* Lecd must be up in this case */
854         bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc));
855         if (bytes_left != 0) {
856                 printk
857                     ("lec: lec_vcc_attach, copy from user failed for %d bytes\n",
858                      bytes_left);
859         }
860         if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF ||
861             !dev_lec[ioc_data.dev_num])
862                 return -EINVAL;
863         if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL)))
864                 return -ENOMEM;
865         vpriv->xoff = 0;
866         vpriv->old_pop = vcc->pop;
867         vcc->user_back = vpriv;
868         vcc->pop = lec_pop;
869         lec_vcc_added(dev_lec[ioc_data.dev_num]->priv,
870                       &ioc_data, vcc, vcc->push);
871         vcc->proto_data = dev_lec[ioc_data.dev_num];
872         vcc->push = lec_push;
873         return 0;
874 }
875
876 static int lec_mcast_attach(struct atm_vcc *vcc, int arg)
877 {
878         if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg])
879                 return -EINVAL;
880         vcc->proto_data = dev_lec[arg];
881         return (lec_mcast_make((struct lec_priv *)dev_lec[arg]->priv, vcc));
882 }
883
884 /* Initialize device. */
885 static int lecd_attach(struct atm_vcc *vcc, int arg)
886 {
887         int i;
888         struct lec_priv *priv;
889
890         if (arg < 0)
891                 i = 0;
892         else
893                 i = arg;
894 #ifdef CONFIG_TR
895         if (arg >= MAX_LEC_ITF)
896                 return -EINVAL;
897 #else                           /* Reserve the top NUM_TR_DEVS for TR */
898         if (arg >= (MAX_LEC_ITF - NUM_TR_DEVS))
899                 return -EINVAL;
900 #endif
901         if (!dev_lec[i]) {
902                 int is_trdev, size;
903
904                 is_trdev = 0;
905                 if (i >= (MAX_LEC_ITF - NUM_TR_DEVS))
906                         is_trdev = 1;
907
908                 size = sizeof(struct lec_priv);
909 #ifdef CONFIG_TR
910                 if (is_trdev)
911                         dev_lec[i] = alloc_trdev(size);
912                 else
913 #endif
914                         dev_lec[i] = alloc_etherdev(size);
915                 if (!dev_lec[i])
916                         return -ENOMEM;
917                 snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i);
918                 if (register_netdev(dev_lec[i])) {
919                         free_netdev(dev_lec[i]);
920                         return -EINVAL;
921                 }
922
923                 priv = dev_lec[i]->priv;
924                 priv->is_trdev = is_trdev;
925                 lec_init(dev_lec[i]);
926         } else {
927                 priv = dev_lec[i]->priv;
928                 if (priv->lecd)
929                         return -EADDRINUSE;
930         }
931         lec_arp_init(priv);
932         priv->itfnum = i;       /* LANE2 addition */
933         priv->lecd = vcc;
934         vcc->dev = &lecatm_dev;
935         vcc_insert_socket(sk_atm(vcc));
936
937         vcc->proto_data = dev_lec[i];
938         set_bit(ATM_VF_META, &vcc->flags);
939         set_bit(ATM_VF_READY, &vcc->flags);
940
941         /* Set default values to these variables */
942         priv->maximum_unknown_frame_count = 1;
943         priv->max_unknown_frame_time = (1 * HZ);
944         priv->vcc_timeout_period = (1200 * HZ);
945         priv->max_retry_count = 1;
946         priv->aging_time = (300 * HZ);
947         priv->forward_delay_time = (15 * HZ);
948         priv->topology_change = 0;
949         priv->arp_response_time = (1 * HZ);
950         priv->flush_timeout = (4 * HZ);
951         priv->path_switching_delay = (6 * HZ);
952
953         if (dev_lec[i]->flags & IFF_UP) {
954                 netif_start_queue(dev_lec[i]);
955         }
956         __module_get(THIS_MODULE);
957         return i;
958 }
959
960 #ifdef CONFIG_PROC_FS
961 static char *lec_arp_get_status_string(unsigned char status)
962 {
963         static char *lec_arp_status_string[] = {
964                 "ESI_UNKNOWN       ",
965                 "ESI_ARP_PENDING   ",
966                 "ESI_VC_PENDING    ",
967                 "<Undefined>       ",
968                 "ESI_FLUSH_PENDING ",
969                 "ESI_FORWARD_DIRECT"
970         };
971
972         if (status > ESI_FORWARD_DIRECT)
973                 status = 3;     /* ESI_UNDEFINED */
974         return lec_arp_status_string[status];
975 }
976
977 static void lec_info(struct seq_file *seq, struct lec_arp_table *entry)
978 {
979         int i;
980
981         for (i = 0; i < ETH_ALEN; i++)
982                 seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff);
983         seq_printf(seq, " ");
984         for (i = 0; i < ATM_ESA_LEN; i++)
985                 seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff);
986         seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status),
987                    entry->flags & 0xffff);
988         if (entry->vcc)
989                 seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci);
990         else
991                 seq_printf(seq, "        ");
992         if (entry->recv_vcc) {
993                 seq_printf(seq, "     %3d %3d", entry->recv_vcc->vpi,
994                            entry->recv_vcc->vci);
995         }
996         seq_putc(seq, '\n');
997 }
998
999 struct lec_state {
1000         unsigned long flags;
1001         struct lec_priv *locked;
1002         struct hlist_node *node;
1003         struct net_device *dev;
1004         int itf;
1005         int arp_table;
1006         int misc_table;
1007 };
1008
1009 static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl,
1010                           loff_t *l)
1011 {
1012         struct hlist_node *e = state->node;
1013         struct lec_arp_table *tmp;
1014
1015         if (!e)
1016                 e = tbl->first;
1017         if (e == (void *)1) {
1018                 e = tbl->first;
1019                 --*l;
1020         }
1021
1022         hlist_for_each_entry_from(tmp, e, next) {
1023                 if (--*l < 0)
1024                         break;
1025         }
1026         state->node = e;
1027
1028         return (*l < 0) ? state : NULL;
1029 }
1030
1031 static void *lec_arp_walk(struct lec_state *state, loff_t *l,
1032                           struct lec_priv *priv)
1033 {
1034         void *v = NULL;
1035         int p;
1036
1037         for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) {
1038                 v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l);
1039                 if (v)
1040                         break;
1041         }
1042         state->arp_table = p;
1043         return v;
1044 }
1045
1046 static void *lec_misc_walk(struct lec_state *state, loff_t *l,
1047                            struct lec_priv *priv)
1048 {
1049         struct hlist_head *lec_misc_tables[] = {
1050                 &priv->lec_arp_empty_ones,
1051                 &priv->lec_no_forward,
1052                 &priv->mcast_fwds
1053         };
1054         void *v = NULL;
1055         int q;
1056
1057         for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) {
1058                 v = lec_tbl_walk(state, lec_misc_tables[q], l);
1059                 if (v)
1060                         break;
1061         }
1062         state->misc_table = q;
1063         return v;
1064 }
1065
1066 static void *lec_priv_walk(struct lec_state *state, loff_t *l,
1067                            struct lec_priv *priv)
1068 {
1069         if (!state->locked) {
1070                 state->locked = priv;
1071                 spin_lock_irqsave(&priv->lec_arp_lock, state->flags);
1072         }
1073         if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) {
1074                 spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags);
1075                 state->locked = NULL;
1076                 /* Partial state reset for the next time we get called */
1077                 state->arp_table = state->misc_table = 0;
1078         }
1079         return state->locked;
1080 }
1081
1082 static void *lec_itf_walk(struct lec_state *state, loff_t *l)
1083 {
1084         struct net_device *dev;
1085         void *v;
1086
1087         dev = state->dev ? state->dev : dev_lec[state->itf];
1088         v = (dev && dev->priv) ? lec_priv_walk(state, l, dev->priv) : NULL;
1089         if (!v && dev) {
1090                 dev_put(dev);
1091                 /* Partial state reset for the next time we get called */
1092                 dev = NULL;
1093         }
1094         state->dev = dev;
1095         return v;
1096 }
1097
1098 static void *lec_get_idx(struct lec_state *state, loff_t l)
1099 {
1100         void *v = NULL;
1101
1102         for (; state->itf < MAX_LEC_ITF; state->itf++) {
1103                 v = lec_itf_walk(state, &l);
1104                 if (v)
1105                         break;
1106         }
1107         return v;
1108 }
1109
1110 static void *lec_seq_start(struct seq_file *seq, loff_t *pos)
1111 {
1112         struct lec_state *state = seq->private;
1113
1114         state->itf = 0;
1115         state->dev = NULL;
1116         state->locked = NULL;
1117         state->arp_table = 0;
1118         state->misc_table = 0;
1119         state->node = (void *)1;
1120
1121         return *pos ? lec_get_idx(state, *pos) : (void *)1;
1122 }
1123
1124 static void lec_seq_stop(struct seq_file *seq, void *v)
1125 {
1126         struct lec_state *state = seq->private;
1127
1128         if (state->dev) {
1129                 spin_unlock_irqrestore(&state->locked->lec_arp_lock,
1130                                        state->flags);
1131                 dev_put(state->dev);
1132         }
1133 }
1134
1135 static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1136 {
1137         struct lec_state *state = seq->private;
1138
1139         v = lec_get_idx(state, 1);
1140         *pos += !!PTR_ERR(v);
1141         return v;
1142 }
1143
1144 static int lec_seq_show(struct seq_file *seq, void *v)
1145 {
1146         static char lec_banner[] = "Itf  MAC          ATM destination"
1147             "                          Status            Flags "
1148             "VPI/VCI Recv VPI/VCI\n";
1149
1150         if (v == (void *)1)
1151                 seq_puts(seq, lec_banner);
1152         else {
1153                 struct lec_state *state = seq->private;
1154                 struct net_device *dev = state->dev;
1155                 struct lec_arp_table *entry = hlist_entry(state->node, struct lec_arp_table, next);
1156
1157                 seq_printf(seq, "%s ", dev->name);
1158                 lec_info(seq, entry);
1159         }
1160         return 0;
1161 }
1162
1163 static const struct seq_operations lec_seq_ops = {
1164         .start = lec_seq_start,
1165         .next = lec_seq_next,
1166         .stop = lec_seq_stop,
1167         .show = lec_seq_show,
1168 };
1169
1170 static int lec_seq_open(struct inode *inode, struct file *file)
1171 {
1172         return seq_open_private(file, &lec_seq_ops, sizeof(struct lec_state));
1173 }
1174
1175 static const struct file_operations lec_seq_fops = {
1176         .owner = THIS_MODULE,
1177         .open = lec_seq_open,
1178         .read = seq_read,
1179         .llseek = seq_lseek,
1180         .release = seq_release_private,
1181 };
1182 #endif
1183
1184 static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1185 {
1186         struct atm_vcc *vcc = ATM_SD(sock);
1187         int err = 0;
1188
1189         switch (cmd) {
1190         case ATMLEC_CTRL:
1191         case ATMLEC_MCAST:
1192         case ATMLEC_DATA:
1193                 if (!capable(CAP_NET_ADMIN))
1194                         return -EPERM;
1195                 break;
1196         default:
1197                 return -ENOIOCTLCMD;
1198         }
1199
1200         switch (cmd) {
1201         case ATMLEC_CTRL:
1202                 err = lecd_attach(vcc, (int)arg);
1203                 if (err >= 0)
1204                         sock->state = SS_CONNECTED;
1205                 break;
1206         case ATMLEC_MCAST:
1207                 err = lec_mcast_attach(vcc, (int)arg);
1208                 break;
1209         case ATMLEC_DATA:
1210                 err = lec_vcc_attach(vcc, (void __user *)arg);
1211                 break;
1212         }
1213
1214         return err;
1215 }
1216
1217 static struct atm_ioctl lane_ioctl_ops = {
1218         .owner = THIS_MODULE,
1219         .ioctl = lane_ioctl,
1220 };
1221
1222 static int __init lane_module_init(void)
1223 {
1224 #ifdef CONFIG_PROC_FS
1225         struct proc_dir_entry *p;
1226
1227         p = proc_create("lec", S_IRUGO, atm_proc_root, &lec_seq_fops);
1228 #endif
1229
1230         register_atm_ioctl(&lane_ioctl_ops);
1231         printk("lec.c: " __DATE__ " " __TIME__ " initialized\n");
1232         return 0;
1233 }
1234
1235 static void __exit lane_module_cleanup(void)
1236 {
1237         int i;
1238         struct lec_priv *priv;
1239
1240         remove_proc_entry("lec", atm_proc_root);
1241
1242         deregister_atm_ioctl(&lane_ioctl_ops);
1243
1244         for (i = 0; i < MAX_LEC_ITF; i++) {
1245                 if (dev_lec[i] != NULL) {
1246                         priv = (struct lec_priv *)dev_lec[i]->priv;
1247                         unregister_netdev(dev_lec[i]);
1248                         free_netdev(dev_lec[i]);
1249                         dev_lec[i] = NULL;
1250                 }
1251         }
1252
1253         return;
1254 }
1255
1256 module_init(lane_module_init);
1257 module_exit(lane_module_cleanup);
1258
1259 /*
1260  * LANE2: 3.1.3, LE_RESOLVE.request
1261  * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs.
1262  * If sizeoftlvs == NULL the default TLVs associated with with this
1263  * lec will be used.
1264  * If dst_mac == NULL, targetless LE_ARP will be sent
1265  */
1266 static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force,
1267                          u8 **tlvs, u32 *sizeoftlvs)
1268 {
1269         unsigned long flags;
1270         struct lec_priv *priv = (struct lec_priv *)dev->priv;
1271         struct lec_arp_table *table;
1272         struct sk_buff *skb;
1273         int retval;
1274
1275         if (force == 0) {
1276                 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1277                 table = lec_arp_find(priv, dst_mac);
1278                 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1279                 if (table == NULL)
1280                         return -1;
1281
1282                 *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC);
1283                 if (*tlvs == NULL)
1284                         return -1;
1285
1286                 *sizeoftlvs = table->sizeoftlvs;
1287
1288                 return 0;
1289         }
1290
1291         if (sizeoftlvs == NULL)
1292                 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL);
1293
1294         else {
1295                 skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC);
1296                 if (skb == NULL)
1297                         return -1;
1298                 skb->len = *sizeoftlvs;
1299                 skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs);
1300                 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb);
1301         }
1302         return retval;
1303 }
1304
1305 /*
1306  * LANE2: 3.1.4, LE_ASSOCIATE.request
1307  * Associate the *tlvs with the *lan_dst address.
1308  * Will overwrite any previous association
1309  * Returns 1 for success, 0 for failure (out of memory)
1310  *
1311  */
1312 static int lane2_associate_req(struct net_device *dev, u8 *lan_dst,
1313                                u8 *tlvs, u32 sizeoftlvs)
1314 {
1315         int retval;
1316         struct sk_buff *skb;
1317         struct lec_priv *priv = (struct lec_priv *)dev->priv;
1318
1319         if (compare_ether_addr(lan_dst, dev->dev_addr))
1320                 return (0);     /* not our mac address */
1321
1322         kfree(priv->tlvs);      /* NULL if there was no previous association */
1323
1324         priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1325         if (priv->tlvs == NULL)
1326                 return (0);
1327         priv->sizeoftlvs = sizeoftlvs;
1328
1329         skb = alloc_skb(sizeoftlvs, GFP_ATOMIC);
1330         if (skb == NULL)
1331                 return 0;
1332         skb->len = sizeoftlvs;
1333         skb_copy_to_linear_data(skb, tlvs, sizeoftlvs);
1334         retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb);
1335         if (retval != 0)
1336                 printk("lec.c: lane2_associate_req() failed\n");
1337         /*
1338          * If the previous association has changed we must
1339          * somehow notify other LANE entities about the change
1340          */
1341         return (1);
1342 }
1343
1344 /*
1345  * LANE2: 3.1.5, LE_ASSOCIATE.indication
1346  *
1347  */
1348 static void lane2_associate_ind(struct net_device *dev, u8 *mac_addr,
1349                                 u8 *tlvs, u32 sizeoftlvs)
1350 {
1351 #if 0
1352         int i = 0;
1353 #endif
1354         struct lec_priv *priv = (struct lec_priv *)dev->priv;
1355 #if 0                           /*
1356                                  * Why have the TLVs in LE_ARP entries
1357                                  * since we do not use them? When you
1358                                  * uncomment this code, make sure the
1359                                  * TLVs get freed when entry is killed
1360                                  */
1361         struct lec_arp_table *entry = lec_arp_find(priv, mac_addr);
1362
1363         if (entry == NULL)
1364                 return;         /* should not happen */
1365
1366         kfree(entry->tlvs);
1367
1368         entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
1369         if (entry->tlvs == NULL)
1370                 return;
1371         entry->sizeoftlvs = sizeoftlvs;
1372 #endif
1373 #if 0
1374         printk("lec.c: lane2_associate_ind()\n");
1375         printk("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs);
1376         while (i < sizeoftlvs)
1377                 printk("%02x ", tlvs[i++]);
1378
1379         printk("\n");
1380 #endif
1381
1382         /* tell MPOA about the TLVs we saw */
1383         if (priv->lane2_ops && priv->lane2_ops->associate_indicator) {
1384                 priv->lane2_ops->associate_indicator(dev, mac_addr,
1385                                                      tlvs, sizeoftlvs);
1386         }
1387         return;
1388 }
1389
1390 /*
1391  * Here starts what used to lec_arpc.c
1392  *
1393  * lec_arpc.c was added here when making
1394  * lane client modular. October 1997
1395  */
1396
1397 #include <linux/types.h>
1398 #include <linux/timer.h>
1399 #include <asm/param.h>
1400 #include <asm/atomic.h>
1401 #include <linux/inetdevice.h>
1402 #include <net/route.h>
1403
1404 #if 0
1405 #define pr_debug(format,args...)
1406 /*
1407 #define pr_debug printk
1408 */
1409 #endif
1410 #define DEBUG_ARP_TABLE 0
1411
1412 #define LEC_ARP_REFRESH_INTERVAL (3*HZ)
1413
1414 static void lec_arp_check_expire(struct work_struct *work);
1415 static void lec_arp_expire_arp(unsigned long data);
1416
1417 /*
1418  * Arp table funcs
1419  */
1420
1421 #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE -1))
1422
1423 /*
1424  * Initialization of arp-cache
1425  */
1426 static void lec_arp_init(struct lec_priv *priv)
1427 {
1428         unsigned short i;
1429
1430         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1431                 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1432         }
1433         INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1434         INIT_HLIST_HEAD(&priv->lec_no_forward);
1435         INIT_HLIST_HEAD(&priv->mcast_fwds);
1436         spin_lock_init(&priv->lec_arp_lock);
1437         INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire);
1438         schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1439 }
1440
1441 static void lec_arp_clear_vccs(struct lec_arp_table *entry)
1442 {
1443         if (entry->vcc) {
1444                 struct atm_vcc *vcc = entry->vcc;
1445                 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
1446                 struct net_device *dev = (struct net_device *)vcc->proto_data;
1447
1448                 vcc->pop = vpriv->old_pop;
1449                 if (vpriv->xoff)
1450                         netif_wake_queue(dev);
1451                 kfree(vpriv);
1452                 vcc->user_back = NULL;
1453                 vcc->push = entry->old_push;
1454                 vcc_release_async(vcc, -EPIPE);
1455                 entry->vcc = NULL;
1456         }
1457         if (entry->recv_vcc) {
1458                 entry->recv_vcc->push = entry->old_recv_push;
1459                 vcc_release_async(entry->recv_vcc, -EPIPE);
1460                 entry->recv_vcc = NULL;
1461         }
1462 }
1463
1464 /*
1465  * Insert entry to lec_arp_table
1466  * LANE2: Add to the end of the list to satisfy 8.1.13
1467  */
1468 static inline void
1469 lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry)
1470 {
1471         struct hlist_head *tmp;
1472
1473         tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])];
1474         hlist_add_head(&entry->next, tmp);
1475
1476         pr_debug("LEC_ARP: Added entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1477                 0xff & entry->mac_addr[0], 0xff & entry->mac_addr[1],
1478                 0xff & entry->mac_addr[2], 0xff & entry->mac_addr[3],
1479                 0xff & entry->mac_addr[4], 0xff & entry->mac_addr[5]);
1480 }
1481
1482 /*
1483  * Remove entry from lec_arp_table
1484  */
1485 static int
1486 lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove)
1487 {
1488         struct hlist_node *node;
1489         struct lec_arp_table *entry;
1490         int i, remove_vcc = 1;
1491
1492         if (!to_remove) {
1493                 return -1;
1494         }
1495
1496         hlist_del(&to_remove->next);
1497         del_timer(&to_remove->timer);
1498
1499         /* If this is the only MAC connected to this VCC, also tear down the VCC */
1500         if (to_remove->status >= ESI_FLUSH_PENDING) {
1501                 /*
1502                  * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT
1503                  */
1504                 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1505                         hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
1506                                 if (memcmp(to_remove->atm_addr,
1507                                            entry->atm_addr, ATM_ESA_LEN) == 0) {
1508                                         remove_vcc = 0;
1509                                         break;
1510                                 }
1511                         }
1512                 }
1513                 if (remove_vcc)
1514                         lec_arp_clear_vccs(to_remove);
1515         }
1516         skb_queue_purge(&to_remove->tx_wait);   /* FIXME: good place for this? */
1517
1518         pr_debug("LEC_ARP: Removed entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1519                 0xff & to_remove->mac_addr[0], 0xff & to_remove->mac_addr[1],
1520                 0xff & to_remove->mac_addr[2], 0xff & to_remove->mac_addr[3],
1521                 0xff & to_remove->mac_addr[4], 0xff & to_remove->mac_addr[5]);
1522         return 0;
1523 }
1524
1525 #if DEBUG_ARP_TABLE
1526 static char *get_status_string(unsigned char st)
1527 {
1528         switch (st) {
1529         case ESI_UNKNOWN:
1530                 return "ESI_UNKNOWN";
1531         case ESI_ARP_PENDING:
1532                 return "ESI_ARP_PENDING";
1533         case ESI_VC_PENDING:
1534                 return "ESI_VC_PENDING";
1535         case ESI_FLUSH_PENDING:
1536                 return "ESI_FLUSH_PENDING";
1537         case ESI_FORWARD_DIRECT:
1538                 return "ESI_FORWARD_DIRECT";
1539         default:
1540                 return "<UNKNOWN>";
1541         }
1542 }
1543
1544 static void dump_arp_table(struct lec_priv *priv)
1545 {
1546         struct hlist_node *node;
1547         struct lec_arp_table *rulla;
1548         char buf[256];
1549         int i, j, offset;
1550
1551         printk("Dump %p:\n", priv);
1552         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1553                 hlist_for_each_entry(rulla, node, &priv->lec_arp_tables[i], next) {
1554                         offset = 0;
1555                         offset += sprintf(buf, "%d: %p\n", i, rulla);
1556                         offset += sprintf(buf + offset, "Mac:");
1557                         for (j = 0; j < ETH_ALEN; j++) {
1558                                 offset += sprintf(buf + offset,
1559                                                   "%2.2x ",
1560                                                   rulla->mac_addr[j] & 0xff);
1561                         }
1562                         offset += sprintf(buf + offset, "Atm:");
1563                         for (j = 0; j < ATM_ESA_LEN; j++) {
1564                                 offset += sprintf(buf + offset,
1565                                                   "%2.2x ",
1566                                                   rulla->atm_addr[j] & 0xff);
1567                         }
1568                         offset += sprintf(buf + offset,
1569                                           "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1570                                           rulla->vcc ? rulla->vcc->vpi : 0,
1571                                           rulla->vcc ? rulla->vcc->vci : 0,
1572                                           rulla->recv_vcc ? rulla->recv_vcc->
1573                                           vpi : 0,
1574                                           rulla->recv_vcc ? rulla->recv_vcc->
1575                                           vci : 0, rulla->last_used,
1576                                           rulla->timestamp, rulla->no_tries);
1577                         offset +=
1578                             sprintf(buf + offset,
1579                                     "Flags:%x, Packets_flooded:%x, Status: %s ",
1580                                     rulla->flags, rulla->packets_flooded,
1581                                     get_status_string(rulla->status));
1582                         printk("%s\n", buf);
1583                 }
1584         }
1585
1586         if (!hlist_empty(&priv->lec_no_forward))
1587                 printk("No forward\n");
1588         hlist_for_each_entry(rulla, node, &priv->lec_no_forward, next) {
1589                 offset = 0;
1590                 offset += sprintf(buf + offset, "Mac:");
1591                 for (j = 0; j < ETH_ALEN; j++) {
1592                         offset += sprintf(buf + offset, "%2.2x ",
1593                                           rulla->mac_addr[j] & 0xff);
1594                 }
1595                 offset += sprintf(buf + offset, "Atm:");
1596                 for (j = 0; j < ATM_ESA_LEN; j++) {
1597                         offset += sprintf(buf + offset, "%2.2x ",
1598                                           rulla->atm_addr[j] & 0xff);
1599                 }
1600                 offset += sprintf(buf + offset,
1601                                   "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1602                                   rulla->vcc ? rulla->vcc->vpi : 0,
1603                                   rulla->vcc ? rulla->vcc->vci : 0,
1604                                   rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1605                                   rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1606                                   rulla->last_used,
1607                                   rulla->timestamp, rulla->no_tries);
1608                 offset += sprintf(buf + offset,
1609                                   "Flags:%x, Packets_flooded:%x, Status: %s ",
1610                                   rulla->flags, rulla->packets_flooded,
1611                                   get_status_string(rulla->status));
1612                 printk("%s\n", buf);
1613         }
1614
1615         if (!hlist_empty(&priv->lec_arp_empty_ones))
1616                 printk("Empty ones\n");
1617         hlist_for_each_entry(rulla, node, &priv->lec_arp_empty_ones, next) {
1618                 offset = 0;
1619                 offset += sprintf(buf + offset, "Mac:");
1620                 for (j = 0; j < ETH_ALEN; j++) {
1621                         offset += sprintf(buf + offset, "%2.2x ",
1622                                           rulla->mac_addr[j] & 0xff);
1623                 }
1624                 offset += sprintf(buf + offset, "Atm:");
1625                 for (j = 0; j < ATM_ESA_LEN; j++) {
1626                         offset += sprintf(buf + offset, "%2.2x ",
1627                                           rulla->atm_addr[j] & 0xff);
1628                 }
1629                 offset += sprintf(buf + offset,
1630                                   "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1631                                   rulla->vcc ? rulla->vcc->vpi : 0,
1632                                   rulla->vcc ? rulla->vcc->vci : 0,
1633                                   rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1634                                   rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1635                                   rulla->last_used,
1636                                   rulla->timestamp, rulla->no_tries);
1637                 offset += sprintf(buf + offset,
1638                                   "Flags:%x, Packets_flooded:%x, Status: %s ",
1639                                   rulla->flags, rulla->packets_flooded,
1640                                   get_status_string(rulla->status));
1641                 printk("%s", buf);
1642         }
1643
1644         if (!hlist_empty(&priv->mcast_fwds))
1645                 printk("Multicast Forward VCCs\n");
1646         hlist_for_each_entry(rulla, node, &priv->mcast_fwds, next) {
1647                 offset = 0;
1648                 offset += sprintf(buf + offset, "Mac:");
1649                 for (j = 0; j < ETH_ALEN; j++) {
1650                         offset += sprintf(buf + offset, "%2.2x ",
1651                                           rulla->mac_addr[j] & 0xff);
1652                 }
1653                 offset += sprintf(buf + offset, "Atm:");
1654                 for (j = 0; j < ATM_ESA_LEN; j++) {
1655                         offset += sprintf(buf + offset, "%2.2x ",
1656                                           rulla->atm_addr[j] & 0xff);
1657                 }
1658                 offset += sprintf(buf + offset,
1659                                   "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1660                                   rulla->vcc ? rulla->vcc->vpi : 0,
1661                                   rulla->vcc ? rulla->vcc->vci : 0,
1662                                   rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1663                                   rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1664                                   rulla->last_used,
1665                                   rulla->timestamp, rulla->no_tries);
1666                 offset += sprintf(buf + offset,
1667                                   "Flags:%x, Packets_flooded:%x, Status: %s ",
1668                                   rulla->flags, rulla->packets_flooded,
1669                                   get_status_string(rulla->status));
1670                 printk("%s\n", buf);
1671         }
1672
1673 }
1674 #else
1675 #define dump_arp_table(priv) do { } while (0)
1676 #endif
1677
1678 /*
1679  * Destruction of arp-cache
1680  */
1681 static void lec_arp_destroy(struct lec_priv *priv)
1682 {
1683         unsigned long flags;
1684         struct hlist_node *node, *next;
1685         struct lec_arp_table *entry;
1686         int i;
1687
1688         cancel_rearming_delayed_work(&priv->lec_arp_work);
1689
1690         /*
1691          * Remove all entries
1692          */
1693
1694         spin_lock_irqsave(&priv->lec_arp_lock, flags);
1695         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1696                 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
1697                         lec_arp_remove(priv, entry);
1698                         lec_arp_put(entry);
1699                 }
1700                 INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
1701         }
1702
1703         hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
1704                 del_timer_sync(&entry->timer);
1705                 lec_arp_clear_vccs(entry);
1706                 hlist_del(&entry->next);
1707                 lec_arp_put(entry);
1708         }
1709         INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
1710
1711         hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) {
1712                 del_timer_sync(&entry->timer);
1713                 lec_arp_clear_vccs(entry);
1714                 hlist_del(&entry->next);
1715                 lec_arp_put(entry);
1716         }
1717         INIT_HLIST_HEAD(&priv->lec_no_forward);
1718
1719         hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) {
1720                 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
1721                 lec_arp_clear_vccs(entry);
1722                 hlist_del(&entry->next);
1723                 lec_arp_put(entry);
1724         }
1725         INIT_HLIST_HEAD(&priv->mcast_fwds);
1726         priv->mcast_vcc = NULL;
1727         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1728 }
1729
1730 /*
1731  * Find entry by mac_address
1732  */
1733 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
1734                                           unsigned char *mac_addr)
1735 {
1736         struct hlist_node *node;
1737         struct hlist_head *head;
1738         struct lec_arp_table *entry;
1739
1740         pr_debug("LEC_ARP: lec_arp_find :%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1741                 mac_addr[0] & 0xff, mac_addr[1] & 0xff, mac_addr[2] & 0xff,
1742                 mac_addr[3] & 0xff, mac_addr[4] & 0xff, mac_addr[5] & 0xff);
1743
1744         head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])];
1745         hlist_for_each_entry(entry, node, head, next) {
1746                 if (!compare_ether_addr(mac_addr, entry->mac_addr)) {
1747                         return entry;
1748                 }
1749         }
1750         return NULL;
1751 }
1752
1753 static struct lec_arp_table *make_entry(struct lec_priv *priv,
1754                                         unsigned char *mac_addr)
1755 {
1756         struct lec_arp_table *to_return;
1757
1758         to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC);
1759         if (!to_return) {
1760                 printk("LEC: Arp entry kmalloc failed\n");
1761                 return NULL;
1762         }
1763         memcpy(to_return->mac_addr, mac_addr, ETH_ALEN);
1764         INIT_HLIST_NODE(&to_return->next);
1765         setup_timer(&to_return->timer, lec_arp_expire_arp,
1766                         (unsigned long)to_return);
1767         to_return->last_used = jiffies;
1768         to_return->priv = priv;
1769         skb_queue_head_init(&to_return->tx_wait);
1770         atomic_set(&to_return->usage, 1);
1771         return to_return;
1772 }
1773
1774 /* Arp sent timer expired */
1775 static void lec_arp_expire_arp(unsigned long data)
1776 {
1777         struct lec_arp_table *entry;
1778
1779         entry = (struct lec_arp_table *)data;
1780
1781         pr_debug("lec_arp_expire_arp\n");
1782         if (entry->status == ESI_ARP_PENDING) {
1783                 if (entry->no_tries <= entry->priv->max_retry_count) {
1784                         if (entry->is_rdesc)
1785                                 send_to_lecd(entry->priv, l_rdesc_arp_xmt,
1786                                              entry->mac_addr, NULL, NULL);
1787                         else
1788                                 send_to_lecd(entry->priv, l_arp_xmt,
1789                                              entry->mac_addr, NULL, NULL);
1790                         entry->no_tries++;
1791                 }
1792                 mod_timer(&entry->timer, jiffies + (1 * HZ));
1793         }
1794 }
1795
1796 /* Unknown/unused vcc expire, remove associated entry */
1797 static void lec_arp_expire_vcc(unsigned long data)
1798 {
1799         unsigned long flags;
1800         struct lec_arp_table *to_remove = (struct lec_arp_table *)data;
1801         struct lec_priv *priv = (struct lec_priv *)to_remove->priv;
1802
1803         del_timer(&to_remove->timer);
1804
1805         pr_debug("LEC_ARP %p %p: lec_arp_expire_vcc vpi:%d vci:%d\n",
1806                 to_remove, priv,
1807                 to_remove->vcc ? to_remove->recv_vcc->vpi : 0,
1808                 to_remove->vcc ? to_remove->recv_vcc->vci : 0);
1809
1810         spin_lock_irqsave(&priv->lec_arp_lock, flags);
1811         hlist_del(&to_remove->next);
1812         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1813
1814         lec_arp_clear_vccs(to_remove);
1815         lec_arp_put(to_remove);
1816 }
1817
1818 /*
1819  * Expire entries.
1820  * 1. Re-set timer
1821  * 2. For each entry, delete entries that have aged past the age limit.
1822  * 3. For each entry, depending on the status of the entry, perform
1823  *    the following maintenance.
1824  *    a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the
1825  *       tick_count is above the max_unknown_frame_time, clear
1826  *       the tick_count to zero and clear the packets_flooded counter
1827  *       to zero. This supports the packet rate limit per address
1828  *       while flooding unknowns.
1829  *    b. If the status is ESI_FLUSH_PENDING and the tick_count is greater
1830  *       than or equal to the path_switching_delay, change the status
1831  *       to ESI_FORWARD_DIRECT. This causes the flush period to end
1832  *       regardless of the progress of the flush protocol.
1833  */
1834 static void lec_arp_check_expire(struct work_struct *work)
1835 {
1836         unsigned long flags;
1837         struct lec_priv *priv =
1838                 container_of(work, struct lec_priv, lec_arp_work.work);
1839         struct hlist_node *node, *next;
1840         struct lec_arp_table *entry;
1841         unsigned long now;
1842         unsigned long time_to_check;
1843         int i;
1844
1845         pr_debug("lec_arp_check_expire %p\n", priv);
1846         now = jiffies;
1847 restart:
1848         spin_lock_irqsave(&priv->lec_arp_lock, flags);
1849         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1850                 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
1851                         if ((entry->flags) & LEC_REMOTE_FLAG &&
1852                             priv->topology_change)
1853                                 time_to_check = priv->forward_delay_time;
1854                         else
1855                                 time_to_check = priv->aging_time;
1856
1857                         pr_debug("About to expire: %lx - %lx > %lx\n",
1858                                 now, entry->last_used, time_to_check);
1859                         if (time_after(now, entry->last_used + time_to_check)
1860                             && !(entry->flags & LEC_PERMANENT_FLAG)
1861                             && !(entry->mac_addr[0] & 0x01)) {  /* LANE2: 7.1.20 */
1862                                 /* Remove entry */
1863                                 pr_debug("LEC:Entry timed out\n");
1864                                 lec_arp_remove(priv, entry);
1865                                 lec_arp_put(entry);
1866                         } else {
1867                                 /* Something else */
1868                                 if ((entry->status == ESI_VC_PENDING ||
1869                                      entry->status == ESI_ARP_PENDING)
1870                                     && time_after_eq(now,
1871                                                      entry->timestamp +
1872                                                      priv->
1873                                                      max_unknown_frame_time)) {
1874                                         entry->timestamp = jiffies;
1875                                         entry->packets_flooded = 0;
1876                                         if (entry->status == ESI_VC_PENDING)
1877                                                 send_to_lecd(priv, l_svc_setup,
1878                                                              entry->mac_addr,
1879                                                              entry->atm_addr,
1880                                                              NULL);
1881                                 }
1882                                 if (entry->status == ESI_FLUSH_PENDING
1883                                     &&
1884                                     time_after_eq(now, entry->timestamp +
1885                                                   priv->path_switching_delay)) {
1886                                         struct sk_buff *skb;
1887                                         struct atm_vcc *vcc = entry->vcc;
1888
1889                                         lec_arp_hold(entry);
1890                                         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1891                                         while ((skb = skb_dequeue(&entry->tx_wait)) != NULL)
1892                                                 lec_send(vcc, skb, entry->priv);
1893                                         entry->last_used = jiffies;
1894                                         entry->status = ESI_FORWARD_DIRECT;
1895                                         lec_arp_put(entry);
1896                                         goto restart;
1897                                 }
1898                         }
1899                 }
1900         }
1901         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1902
1903         schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
1904 }
1905
1906 /*
1907  * Try to find vcc where mac_address is attached.
1908  *
1909  */
1910 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
1911                                        unsigned char *mac_to_find, int is_rdesc,
1912                                        struct lec_arp_table **ret_entry)
1913 {
1914         unsigned long flags;
1915         struct lec_arp_table *entry;
1916         struct atm_vcc *found;
1917
1918         if (mac_to_find[0] & 0x01) {
1919                 switch (priv->lane_version) {
1920                 case 1:
1921                         return priv->mcast_vcc;
1922                         break;
1923                 case 2: /* LANE2 wants arp for multicast addresses */
1924                         if (!compare_ether_addr(mac_to_find, bus_mac))
1925                                 return priv->mcast_vcc;
1926                         break;
1927                 default:
1928                         break;
1929                 }
1930         }
1931
1932         spin_lock_irqsave(&priv->lec_arp_lock, flags);
1933         entry = lec_arp_find(priv, mac_to_find);
1934
1935         if (entry) {
1936                 if (entry->status == ESI_FORWARD_DIRECT) {
1937                         /* Connection Ok */
1938                         entry->last_used = jiffies;
1939                         lec_arp_hold(entry);
1940                         *ret_entry = entry;
1941                         found = entry->vcc;
1942                         goto out;
1943                 }
1944                 /*
1945                  * If the LE_ARP cache entry is still pending, reset count to 0
1946                  * so another LE_ARP request can be made for this frame.
1947                  */
1948                 if (entry->status == ESI_ARP_PENDING) {
1949                         entry->no_tries = 0;
1950                 }
1951                 /*
1952                  * Data direct VC not yet set up, check to see if the unknown
1953                  * frame count is greater than the limit. If the limit has
1954                  * not been reached, allow the caller to send packet to
1955                  * BUS.
1956                  */
1957                 if (entry->status != ESI_FLUSH_PENDING &&
1958                     entry->packets_flooded <
1959                     priv->maximum_unknown_frame_count) {
1960                         entry->packets_flooded++;
1961                         pr_debug("LEC_ARP: Flooding..\n");
1962                         found = priv->mcast_vcc;
1963                         goto out;
1964                 }
1965                 /*
1966                  * We got here because entry->status == ESI_FLUSH_PENDING
1967                  * or BUS flood limit was reached for an entry which is
1968                  * in ESI_ARP_PENDING or ESI_VC_PENDING state.
1969                  */
1970                 lec_arp_hold(entry);
1971                 *ret_entry = entry;
1972                 pr_debug("lec: entry->status %d entry->vcc %p\n", entry->status,
1973                         entry->vcc);
1974                 found = NULL;
1975         } else {
1976                 /* No matching entry was found */
1977                 entry = make_entry(priv, mac_to_find);
1978                 pr_debug("LEC_ARP: Making entry\n");
1979                 if (!entry) {
1980                         found = priv->mcast_vcc;
1981                         goto out;
1982                 }
1983                 lec_arp_add(priv, entry);
1984                 /* We want arp-request(s) to be sent */
1985                 entry->packets_flooded = 1;
1986                 entry->status = ESI_ARP_PENDING;
1987                 entry->no_tries = 1;
1988                 entry->last_used = entry->timestamp = jiffies;
1989                 entry->is_rdesc = is_rdesc;
1990                 if (entry->is_rdesc)
1991                         send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL,
1992                                      NULL);
1993                 else
1994                         send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL);
1995                 entry->timer.expires = jiffies + (1 * HZ);
1996                 entry->timer.function = lec_arp_expire_arp;
1997                 add_timer(&entry->timer);
1998                 found = priv->mcast_vcc;
1999         }
2000
2001 out:
2002         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2003         return found;
2004 }
2005
2006 static int
2007 lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr,
2008                 unsigned long permanent)
2009 {
2010         unsigned long flags;
2011         struct hlist_node *node, *next;
2012         struct lec_arp_table *entry;
2013         int i;
2014
2015         pr_debug("lec_addr_delete\n");
2016         spin_lock_irqsave(&priv->lec_arp_lock, flags);
2017         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2018                 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
2019                         if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)
2020                             && (permanent ||
2021                                 !(entry->flags & LEC_PERMANENT_FLAG))) {
2022                                 lec_arp_remove(priv, entry);
2023                                 lec_arp_put(entry);
2024                         }
2025                         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2026                         return 0;
2027                 }
2028         }
2029         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2030         return -1;
2031 }
2032
2033 /*
2034  * Notifies:  Response to arp_request (atm_addr != NULL)
2035  */
2036 static void
2037 lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr,
2038                unsigned char *atm_addr, unsigned long remoteflag,
2039                unsigned int targetless_le_arp)
2040 {
2041         unsigned long flags;
2042         struct hlist_node *node, *next;
2043         struct lec_arp_table *entry, *tmp;
2044         int i;
2045
2046         pr_debug("lec:%s", (targetless_le_arp) ? "targetless " : " ");
2047         pr_debug("lec_arp_update mac:%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
2048                 mac_addr[0], mac_addr[1], mac_addr[2], mac_addr[3],
2049                 mac_addr[4], mac_addr[5]);
2050
2051         spin_lock_irqsave(&priv->lec_arp_lock, flags);
2052         entry = lec_arp_find(priv, mac_addr);
2053         if (entry == NULL && targetless_le_arp)
2054                 goto out;       /*
2055                                  * LANE2: ignore targetless LE_ARPs for which
2056                                  * we have no entry in the cache. 7.1.30
2057                                  */
2058         if (!hlist_empty(&priv->lec_arp_empty_ones)) {
2059                 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2060                         if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) {
2061                                 hlist_del(&entry->next);
2062                                 del_timer(&entry->timer);
2063                                 tmp = lec_arp_find(priv, mac_addr);
2064                                 if (tmp) {
2065                                         del_timer(&tmp->timer);
2066                                         tmp->status = ESI_FORWARD_DIRECT;
2067                                         memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN);
2068                                         tmp->vcc = entry->vcc;
2069                                         tmp->old_push = entry->old_push;
2070                                         tmp->last_used = jiffies;
2071                                         del_timer(&entry->timer);
2072                                         lec_arp_put(entry);
2073                                         entry = tmp;
2074                                 } else {
2075                                         entry->status = ESI_FORWARD_DIRECT;
2076                                         memcpy(entry->mac_addr, mac_addr, ETH_ALEN);
2077                                         entry->last_used = jiffies;
2078                                         lec_arp_add(priv, entry);
2079                                 }
2080                                 if (remoteflag)
2081                                         entry->flags |= LEC_REMOTE_FLAG;
2082                                 else
2083                                         entry->flags &= ~LEC_REMOTE_FLAG;
2084                                 pr_debug("After update\n");
2085                                 dump_arp_table(priv);
2086                                 goto out;
2087                         }
2088                 }
2089         }
2090
2091         entry = lec_arp_find(priv, mac_addr);
2092         if (!entry) {
2093                 entry = make_entry(priv, mac_addr);
2094                 if (!entry)
2095                         goto out;
2096                 entry->status = ESI_UNKNOWN;
2097                 lec_arp_add(priv, entry);
2098                 /* Temporary, changes before end of function */
2099         }
2100         memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN);
2101         del_timer(&entry->timer);
2102         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2103                 hlist_for_each_entry(tmp, node, &priv->lec_arp_tables[i], next) {
2104                         if (entry != tmp &&
2105                             !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) {
2106                                 /* Vcc to this host exists */
2107                                 if (tmp->status > ESI_VC_PENDING) {
2108                                         /*
2109                                          * ESI_FLUSH_PENDING,
2110                                          * ESI_FORWARD_DIRECT
2111                                          */
2112                                         entry->vcc = tmp->vcc;
2113                                         entry->old_push = tmp->old_push;
2114                                 }
2115                                 entry->status = tmp->status;
2116                                 break;
2117                         }
2118                 }
2119         }
2120         if (remoteflag)
2121                 entry->flags |= LEC_REMOTE_FLAG;
2122         else
2123                 entry->flags &= ~LEC_REMOTE_FLAG;
2124         if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) {
2125                 entry->status = ESI_VC_PENDING;
2126                 send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL);
2127         }
2128         pr_debug("After update2\n");
2129         dump_arp_table(priv);
2130 out:
2131         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2132 }
2133
2134 /*
2135  * Notifies: Vcc setup ready
2136  */
2137 static void
2138 lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data,
2139               struct atm_vcc *vcc,
2140               void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb))
2141 {
2142         unsigned long flags;
2143         struct hlist_node *node;
2144         struct lec_arp_table *entry;
2145         int i, found_entry = 0;
2146
2147         spin_lock_irqsave(&priv->lec_arp_lock, flags);
2148         if (ioc_data->receive == 2) {
2149                 /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */
2150
2151                 pr_debug("LEC_ARP: Attaching mcast forward\n");
2152 #if 0
2153                 entry = lec_arp_find(priv, bus_mac);
2154                 if (!entry) {
2155                         printk("LEC_ARP: Multicast entry not found!\n");
2156                         goto out;
2157                 }
2158                 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2159                 entry->recv_vcc = vcc;
2160                 entry->old_recv_push = old_push;
2161 #endif
2162                 entry = make_entry(priv, bus_mac);
2163                 if (entry == NULL)
2164                         goto out;
2165                 del_timer(&entry->timer);
2166                 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2167                 entry->recv_vcc = vcc;
2168                 entry->old_recv_push = old_push;
2169                 hlist_add_head(&entry->next, &priv->mcast_fwds);
2170                 goto out;
2171         } else if (ioc_data->receive == 1) {
2172                 /*
2173                  * Vcc which we don't want to make default vcc,
2174                  * attach it anyway.
2175                  */
2176                 pr_debug
2177                     ("LEC_ARP:Attaching data direct, not default: "
2178                      "%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",
2179                      ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2180                      ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2181                      ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2182                      ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2183                      ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2184                      ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2185                      ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2186                      ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2187                      ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2188                      ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2189                 entry = make_entry(priv, bus_mac);
2190                 if (entry == NULL)
2191                         goto out;
2192                 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2193                 memset(entry->mac_addr, 0, ETH_ALEN);
2194                 entry->recv_vcc = vcc;
2195                 entry->old_recv_push = old_push;
2196                 entry->status = ESI_UNKNOWN;
2197                 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2198                 entry->timer.function = lec_arp_expire_vcc;
2199                 hlist_add_head(&entry->next, &priv->lec_no_forward);
2200                 add_timer(&entry->timer);
2201                 dump_arp_table(priv);
2202                 goto out;
2203         }
2204         pr_debug
2205             ("LEC_ARP:Attaching data direct, default: "
2206              "%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",
2207              ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2208              ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2209              ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2210              ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2211              ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2212              ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2213              ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2214              ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2215              ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2216              ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2217         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2218                 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2219                         if (memcmp
2220                             (ioc_data->atm_addr, entry->atm_addr,
2221                              ATM_ESA_LEN) == 0) {
2222                                 pr_debug("LEC_ARP: Attaching data direct\n");
2223                                 pr_debug("Currently -> Vcc: %d, Rvcc:%d\n",
2224                                         entry->vcc ? entry->vcc->vci : 0,
2225                                         entry->recv_vcc ? entry->recv_vcc->
2226                                         vci : 0);
2227                                 found_entry = 1;
2228                                 del_timer(&entry->timer);
2229                                 entry->vcc = vcc;
2230                                 entry->old_push = old_push;
2231                                 if (entry->status == ESI_VC_PENDING) {
2232                                         if (priv->maximum_unknown_frame_count
2233                                             == 0)
2234                                                 entry->status =
2235                                                     ESI_FORWARD_DIRECT;
2236                                         else {
2237                                                 entry->timestamp = jiffies;
2238                                                 entry->status =
2239                                                     ESI_FLUSH_PENDING;
2240 #if 0
2241                                                 send_to_lecd(priv, l_flush_xmt,
2242                                                              NULL,
2243                                                              entry->atm_addr,
2244                                                              NULL);
2245 #endif
2246                                         }
2247                                 } else {
2248                                         /*
2249                                          * They were forming a connection
2250                                          * to us, and we to them. Our
2251                                          * ATM address is numerically lower
2252                                          * than theirs, so we make connection
2253                                          * we formed into default VCC (8.1.11).
2254                                          * Connection they made gets torn
2255                                          * down. This might confuse some
2256                                          * clients. Can be changed if
2257                                          * someone reports trouble...
2258                                          */
2259                                         ;
2260                                 }
2261                         }
2262                 }
2263         }
2264         if (found_entry) {
2265                 pr_debug("After vcc was added\n");
2266                 dump_arp_table(priv);
2267                 goto out;
2268         }
2269         /*
2270          * Not found, snatch address from first data packet that arrives
2271          * from this vcc
2272          */
2273         entry = make_entry(priv, bus_mac);
2274         if (!entry)
2275                 goto out;
2276         entry->vcc = vcc;
2277         entry->old_push = old_push;
2278         memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2279         memset(entry->mac_addr, 0, ETH_ALEN);
2280         entry->status = ESI_UNKNOWN;
2281         hlist_add_head(&entry->next, &priv->lec_arp_empty_ones);
2282         entry->timer.expires = jiffies + priv->vcc_timeout_period;
2283         entry->timer.function = lec_arp_expire_vcc;
2284         add_timer(&entry->timer);
2285         pr_debug("After vcc was added\n");
2286         dump_arp_table(priv);
2287 out:
2288         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2289 }
2290
2291 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id)
2292 {
2293         unsigned long flags;
2294         struct hlist_node *node;
2295         struct lec_arp_table *entry;
2296         int i;
2297
2298         pr_debug("LEC:lec_flush_complete %lx\n", tran_id);
2299 restart:
2300         spin_lock_irqsave(&priv->lec_arp_lock, flags);
2301         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2302                 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2303                         if (entry->flush_tran_id == tran_id
2304                             && entry->status == ESI_FLUSH_PENDING) {
2305                                 struct sk_buff *skb;
2306                                 struct atm_vcc *vcc = entry->vcc;
2307
2308                                 lec_arp_hold(entry);
2309                                 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2310                                 while ((skb = skb_dequeue(&entry->tx_wait)) != NULL)
2311                                         lec_send(vcc, skb, entry->priv);
2312                                 entry->last_used = jiffies;
2313                                 entry->status = ESI_FORWARD_DIRECT;
2314                                 lec_arp_put(entry);
2315                                 pr_debug("LEC_ARP: Flushed\n");
2316                                 goto restart;
2317                         }
2318                 }
2319         }
2320         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2321         dump_arp_table(priv);
2322 }
2323
2324 static void
2325 lec_set_flush_tran_id(struct lec_priv *priv,
2326                       unsigned char *atm_addr, unsigned long tran_id)
2327 {
2328         unsigned long flags;
2329         struct hlist_node *node;
2330         struct lec_arp_table *entry;
2331         int i;
2332
2333         spin_lock_irqsave(&priv->lec_arp_lock, flags);
2334         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
2335                 hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) {
2336                         if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) {
2337                                 entry->flush_tran_id = tran_id;
2338                                 pr_debug("Set flush transaction id to %lx for %p\n",
2339                                         tran_id, entry);
2340                         }
2341                 }
2342         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2343 }
2344
2345 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc)
2346 {
2347         unsigned long flags;
2348         unsigned char mac_addr[] = {
2349                 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
2350         };
2351         struct lec_arp_table *to_add;
2352         struct lec_vcc_priv *vpriv;
2353         int err = 0;
2354
2355         if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL)))
2356                 return -ENOMEM;
2357         vpriv->xoff = 0;
2358         vpriv->old_pop = vcc->pop;
2359         vcc->user_back = vpriv;
2360         vcc->pop = lec_pop;
2361         spin_lock_irqsave(&priv->lec_arp_lock, flags);
2362         to_add = make_entry(priv, mac_addr);
2363         if (!to_add) {
2364                 vcc->pop = vpriv->old_pop;
2365                 kfree(vpriv);
2366                 err = -ENOMEM;
2367                 goto out;
2368         }
2369         memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN);
2370         to_add->status = ESI_FORWARD_DIRECT;
2371         to_add->flags |= LEC_PERMANENT_FLAG;
2372         to_add->vcc = vcc;
2373         to_add->old_push = vcc->push;
2374         vcc->push = lec_push;
2375         priv->mcast_vcc = vcc;
2376         lec_arp_add(priv, to_add);
2377 out:
2378         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2379         return err;
2380 }
2381
2382 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc)
2383 {
2384         unsigned long flags;
2385         struct hlist_node *node, *next;
2386         struct lec_arp_table *entry;
2387         int i;
2388
2389         pr_debug("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci);
2390         dump_arp_table(priv);
2391
2392         spin_lock_irqsave(&priv->lec_arp_lock, flags);
2393
2394         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2395                 hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) {
2396                         if (vcc == entry->vcc) {
2397                                 lec_arp_remove(priv, entry);
2398                                 lec_arp_put(entry);
2399                                 if (priv->mcast_vcc == vcc) {
2400                                         priv->mcast_vcc = NULL;
2401                                 }
2402                         }
2403                 }
2404         }
2405
2406         hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2407                 if (entry->vcc == vcc) {
2408                         lec_arp_clear_vccs(entry);
2409                         del_timer(&entry->timer);
2410                         hlist_del(&entry->next);
2411                         lec_arp_put(entry);
2412                 }
2413         }
2414
2415         hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) {
2416                 if (entry->recv_vcc == vcc) {
2417                         lec_arp_clear_vccs(entry);
2418                         del_timer(&entry->timer);
2419                         hlist_del(&entry->next);
2420                         lec_arp_put(entry);
2421                 }
2422         }
2423
2424         hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) {
2425                 if (entry->recv_vcc == vcc) {
2426                         lec_arp_clear_vccs(entry);
2427                         /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
2428                         hlist_del(&entry->next);
2429                         lec_arp_put(entry);
2430                 }
2431         }
2432
2433         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2434         dump_arp_table(priv);
2435 }
2436
2437 static void
2438 lec_arp_check_empties(struct lec_priv *priv,
2439                       struct atm_vcc *vcc, struct sk_buff *skb)
2440 {
2441         unsigned long flags;
2442         struct hlist_node *node, *next;
2443         struct lec_arp_table *entry, *tmp;
2444         struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data;
2445         unsigned char *src;
2446 #ifdef CONFIG_TR
2447         struct lecdatahdr_8025 *tr_hdr = (struct lecdatahdr_8025 *)skb->data;
2448
2449         if (priv->is_trdev)
2450                 src = tr_hdr->h_source;
2451         else
2452 #endif
2453                 src = hdr->h_source;
2454
2455         spin_lock_irqsave(&priv->lec_arp_lock, flags);
2456         hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) {
2457                 if (vcc == entry->vcc) {
2458                         del_timer(&entry->timer);
2459                         memcpy(entry->mac_addr, src, ETH_ALEN);
2460                         entry->status = ESI_FORWARD_DIRECT;
2461                         entry->last_used = jiffies;
2462                         /* We might have got an entry */
2463                         if ((tmp = lec_arp_find(priv, src))) {
2464                                 lec_arp_remove(priv, tmp);
2465                                 lec_arp_put(tmp);
2466                         }
2467                         hlist_del(&entry->next);
2468                         lec_arp_add(priv, entry);
2469                         goto out;
2470                 }
2471         }
2472         pr_debug("LEC_ARP: Arp_check_empties: entry not found!\n");
2473 out:
2474         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2475 }
2476
2477 MODULE_LICENSE("GPL");