Contents of /alx-src/tags/kernel26-2.6.12-alx-r9/net/atm/lec.c
Parent Directory | Revision Log
Revision 630 -
(show annotations)
(download)
Wed Mar 4 11:03:09 2009 UTC (15 years, 3 months ago) by niro
File MIME type: text/plain
File size: 86848 byte(s)
Wed Mar 4 11:03:09 2009 UTC (15 years, 3 months ago) by niro
File MIME type: text/plain
File size: 86848 byte(s)
Tag kernel26-2.6.12-alx-r9
1 | /* |
2 | * lec.c: Lan Emulation driver |
3 | * Marko Kiiskila mkiiskila@yahoo.com |
4 | * |
5 | */ |
6 | |
7 | #include <linux/config.h> |
8 | #include <linux/kernel.h> |
9 | #include <linux/bitops.h> |
10 | |
11 | /* We are ethernet device */ |
12 | #include <linux/if_ether.h> |
13 | #include <linux/netdevice.h> |
14 | #include <linux/etherdevice.h> |
15 | #include <net/sock.h> |
16 | #include <linux/skbuff.h> |
17 | #include <linux/ip.h> |
18 | #include <asm/byteorder.h> |
19 | #include <asm/uaccess.h> |
20 | #include <net/arp.h> |
21 | #include <net/dst.h> |
22 | #include <linux/proc_fs.h> |
23 | #include <linux/spinlock.h> |
24 | #include <linux/proc_fs.h> |
25 | #include <linux/seq_file.h> |
26 | |
27 | /* TokenRing if needed */ |
28 | #ifdef CONFIG_TR |
29 | #include <linux/trdevice.h> |
30 | #endif |
31 | |
32 | /* And atm device */ |
33 | #include <linux/atmdev.h> |
34 | #include <linux/atmlec.h> |
35 | |
36 | /* Proxy LEC knows about bridging */ |
37 | #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) |
38 | #include <linux/if_bridge.h> |
39 | #include "../bridge/br_private.h" |
40 | |
41 | static unsigned char bridge_ula_lec[] = {0x01, 0x80, 0xc2, 0x00, 0x00}; |
42 | #endif |
43 | |
44 | /* Modular too */ |
45 | #include <linux/module.h> |
46 | #include <linux/init.h> |
47 | |
48 | #include "lec.h" |
49 | #include "lec_arpc.h" |
50 | #include "resources.h" |
51 | |
52 | #if 0 |
53 | #define DPRINTK printk |
54 | #else |
55 | #define DPRINTK(format,args...) |
56 | #endif |
57 | |
58 | #define DUMP_PACKETS 0 /* 0 = None, |
59 | * 1 = 30 first bytes |
60 | * 2 = Whole packet |
61 | */ |
62 | |
63 | #define LEC_UNRES_QUE_LEN 8 /* number of tx packets to queue for a |
64 | single destination while waiting for SVC */ |
65 | |
66 | static int lec_open(struct net_device *dev); |
67 | static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev); |
68 | static int lec_close(struct net_device *dev); |
69 | static struct net_device_stats *lec_get_stats(struct net_device *dev); |
70 | static void lec_init(struct net_device *dev); |
71 | static struct lec_arp_table* lec_arp_find(struct lec_priv *priv, |
72 | unsigned char *mac_addr); |
73 | static int lec_arp_remove(struct lec_priv *priv, |
74 | struct lec_arp_table *to_remove); |
75 | /* LANE2 functions */ |
76 | static void lane2_associate_ind (struct net_device *dev, u8 *mac_address, |
77 | u8 *tlvs, u32 sizeoftlvs); |
78 | static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force, |
79 | u8 **tlvs, u32 *sizeoftlvs); |
80 | static int lane2_associate_req (struct net_device *dev, u8 *lan_dst, |
81 | u8 *tlvs, u32 sizeoftlvs); |
82 | |
83 | static int lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr, |
84 | unsigned long permanent); |
85 | static void lec_arp_check_empties(struct lec_priv *priv, |
86 | struct atm_vcc *vcc, struct sk_buff *skb); |
87 | static void lec_arp_destroy(struct lec_priv *priv); |
88 | static void lec_arp_init(struct lec_priv *priv); |
89 | static struct atm_vcc* lec_arp_resolve(struct lec_priv *priv, |
90 | unsigned char *mac_to_find, |
91 | int is_rdesc, |
92 | struct lec_arp_table **ret_entry); |
93 | static void lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr, |
94 | unsigned char *atm_addr, unsigned long remoteflag, |
95 | unsigned int targetless_le_arp); |
96 | static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id); |
97 | static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc); |
98 | static void lec_set_flush_tran_id(struct lec_priv *priv, |
99 | unsigned char *atm_addr, |
100 | unsigned long tran_id); |
101 | static void lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data, |
102 | struct atm_vcc *vcc, |
103 | void (*old_push)(struct atm_vcc *vcc, struct sk_buff *skb)); |
104 | static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc); |
105 | |
106 | static struct lane2_ops lane2_ops = { |
107 | lane2_resolve, /* resolve, spec 3.1.3 */ |
108 | lane2_associate_req, /* associate_req, spec 3.1.4 */ |
109 | NULL /* associate indicator, spec 3.1.5 */ |
110 | }; |
111 | |
112 | static unsigned char bus_mac[ETH_ALEN] = {0xff,0xff,0xff,0xff,0xff,0xff}; |
113 | |
114 | /* Device structures */ |
115 | static struct net_device *dev_lec[MAX_LEC_ITF]; |
116 | |
117 | #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) |
118 | static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev) |
119 | { |
120 | struct ethhdr *eth; |
121 | char *buff; |
122 | struct lec_priv *priv; |
123 | |
124 | /* Check if this is a BPDU. If so, ask zeppelin to send |
125 | * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit |
126 | * as the Config BPDU has */ |
127 | eth = (struct ethhdr *)skb->data; |
128 | buff = skb->data + skb->dev->hard_header_len; |
129 | if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) { |
130 | struct sock *sk; |
131 | struct sk_buff *skb2; |
132 | struct atmlec_msg *mesg; |
133 | |
134 | skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); |
135 | if (skb2 == NULL) return; |
136 | skb2->len = sizeof(struct atmlec_msg); |
137 | mesg = (struct atmlec_msg *)skb2->data; |
138 | mesg->type = l_topology_change; |
139 | buff += 4; |
140 | mesg->content.normal.flag = *buff & 0x01; /* 0x01 is topology change */ |
141 | |
142 | priv = (struct lec_priv *)dev->priv; |
143 | atm_force_charge(priv->lecd, skb2->truesize); |
144 | sk = sk_atm(priv->lecd); |
145 | skb_queue_tail(&sk->sk_receive_queue, skb2); |
146 | sk->sk_data_ready(sk, skb2->len); |
147 | } |
148 | |
149 | return; |
150 | } |
151 | #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */ |
152 | |
153 | /* |
154 | * Modelled after tr_type_trans |
155 | * All multicast and ARE or STE frames go to BUS. |
156 | * Non source routed frames go by destination address. |
157 | * Last hop source routed frames go by destination address. |
158 | * Not last hop source routed frames go by _next_ route descriptor. |
159 | * Returns pointer to destination MAC address or fills in rdesc |
160 | * and returns NULL. |
161 | */ |
162 | #ifdef CONFIG_TR |
163 | static unsigned char *get_tr_dst(unsigned char *packet, unsigned char *rdesc) |
164 | { |
165 | struct trh_hdr *trh; |
166 | int riflen, num_rdsc; |
167 | |
168 | trh = (struct trh_hdr *)packet; |
169 | if (trh->daddr[0] & (uint8_t)0x80) |
170 | return bus_mac; /* multicast */ |
171 | |
172 | if (trh->saddr[0] & TR_RII) { |
173 | riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8; |
174 | if ((ntohs(trh->rcf) >> 13) != 0) |
175 | return bus_mac; /* ARE or STE */ |
176 | } |
177 | else |
178 | return trh->daddr; /* not source routed */ |
179 | |
180 | if (riflen < 6) |
181 | return trh->daddr; /* last hop, source routed */ |
182 | |
183 | /* riflen is 6 or more, packet has more than one route descriptor */ |
184 | num_rdsc = (riflen/2) - 1; |
185 | memset(rdesc, 0, ETH_ALEN); |
186 | /* offset 4 comes from LAN destination field in LE control frames */ |
187 | if (trh->rcf & htons((uint16_t)TR_RCF_DIR_BIT)) |
188 | memcpy(&rdesc[4], &trh->rseg[num_rdsc-2], sizeof(uint16_t)); |
189 | else { |
190 | memcpy(&rdesc[4], &trh->rseg[1], sizeof(uint16_t)); |
191 | rdesc[5] = ((ntohs(trh->rseg[0]) & 0x000f) | (rdesc[5] & 0xf0)); |
192 | } |
193 | |
194 | return NULL; |
195 | } |
196 | #endif /* CONFIG_TR */ |
197 | |
198 | /* |
199 | * Open/initialize the netdevice. This is called (in the current kernel) |
200 | * sometime after booting when the 'ifconfig' program is run. |
201 | * |
202 | * This routine should set everything up anew at each open, even |
203 | * registers that "should" only need to be set once at boot, so that |
204 | * there is non-reboot way to recover if something goes wrong. |
205 | */ |
206 | |
207 | static int |
208 | lec_open(struct net_device *dev) |
209 | { |
210 | struct lec_priv *priv = (struct lec_priv *)dev->priv; |
211 | |
212 | netif_start_queue(dev); |
213 | memset(&priv->stats,0,sizeof(struct net_device_stats)); |
214 | |
215 | return 0; |
216 | } |
217 | |
218 | static __inline__ void |
219 | lec_send(struct atm_vcc *vcc, struct sk_buff *skb, struct lec_priv *priv) |
220 | { |
221 | ATM_SKB(skb)->vcc = vcc; |
222 | ATM_SKB(skb)->atm_options = vcc->atm_options; |
223 | |
224 | atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); |
225 | if (vcc->send(vcc, skb) < 0) { |
226 | priv->stats.tx_dropped++; |
227 | return; |
228 | } |
229 | |
230 | priv->stats.tx_packets++; |
231 | priv->stats.tx_bytes += skb->len; |
232 | } |
233 | |
234 | static void |
235 | lec_tx_timeout(struct net_device *dev) |
236 | { |
237 | printk(KERN_INFO "%s: tx timeout\n", dev->name); |
238 | dev->trans_start = jiffies; |
239 | netif_wake_queue(dev); |
240 | } |
241 | |
242 | static int |
243 | lec_start_xmit(struct sk_buff *skb, struct net_device *dev) |
244 | { |
245 | struct sk_buff *skb2; |
246 | struct lec_priv *priv = (struct lec_priv *)dev->priv; |
247 | struct lecdatahdr_8023 *lec_h; |
248 | struct atm_vcc *vcc; |
249 | struct lec_arp_table *entry; |
250 | unsigned char *dst; |
251 | int min_frame_size; |
252 | #ifdef CONFIG_TR |
253 | unsigned char rdesc[ETH_ALEN]; /* Token Ring route descriptor */ |
254 | #endif |
255 | int is_rdesc; |
256 | #if DUMP_PACKETS > 0 |
257 | char buf[300]; |
258 | int i=0; |
259 | #endif /* DUMP_PACKETS >0 */ |
260 | |
261 | DPRINTK("lec_start_xmit called\n"); |
262 | if (!priv->lecd) { |
263 | printk("%s:No lecd attached\n",dev->name); |
264 | priv->stats.tx_errors++; |
265 | netif_stop_queue(dev); |
266 | return -EUNATCH; |
267 | } |
268 | |
269 | DPRINTK("skbuff head:%lx data:%lx tail:%lx end:%lx\n", |
270 | (long)skb->head, (long)skb->data, (long)skb->tail, |
271 | (long)skb->end); |
272 | #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) |
273 | if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0) |
274 | lec_handle_bridge(skb, dev); |
275 | #endif |
276 | |
277 | /* Make sure we have room for lec_id */ |
278 | if (skb_headroom(skb) < 2) { |
279 | |
280 | DPRINTK("lec_start_xmit: reallocating skb\n"); |
281 | skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN); |
282 | kfree_skb(skb); |
283 | if (skb2 == NULL) return 0; |
284 | skb = skb2; |
285 | } |
286 | skb_push(skb, 2); |
287 | |
288 | /* Put le header to place, works for TokenRing too */ |
289 | lec_h = (struct lecdatahdr_8023*)skb->data; |
290 | lec_h->le_header = htons(priv->lecid); |
291 | |
292 | #ifdef CONFIG_TR |
293 | /* Ugly. Use this to realign Token Ring packets for |
294 | * e.g. PCA-200E driver. */ |
295 | if (priv->is_trdev) { |
296 | skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN); |
297 | kfree_skb(skb); |
298 | if (skb2 == NULL) return 0; |
299 | skb = skb2; |
300 | } |
301 | #endif |
302 | |
303 | #if DUMP_PACKETS > 0 |
304 | printk("%s: send datalen:%ld lecid:%4.4x\n", dev->name, |
305 | skb->len, priv->lecid); |
306 | #if DUMP_PACKETS >= 2 |
307 | for(i=0;i<skb->len && i <99;i++) { |
308 | sprintf(buf+i*3,"%2.2x ",0xff&skb->data[i]); |
309 | } |
310 | #elif DUMP_PACKETS >= 1 |
311 | for(i=0;i<skb->len && i < 30;i++) { |
312 | sprintf(buf+i*3,"%2.2x ", 0xff&skb->data[i]); |
313 | } |
314 | #endif /* DUMP_PACKETS >= 1 */ |
315 | if (i==skb->len) |
316 | printk("%s\n",buf); |
317 | else |
318 | printk("%s...\n",buf); |
319 | #endif /* DUMP_PACKETS > 0 */ |
320 | |
321 | /* Minimum ethernet-frame size */ |
322 | #ifdef CONFIG_TR |
323 | if (priv->is_trdev) |
324 | min_frame_size = LEC_MINIMUM_8025_SIZE; |
325 | else |
326 | #endif |
327 | min_frame_size = LEC_MINIMUM_8023_SIZE; |
328 | if (skb->len < min_frame_size) { |
329 | if ((skb->len + skb_tailroom(skb)) < min_frame_size) { |
330 | skb2 = skb_copy_expand(skb, 0, |
331 | min_frame_size - skb->truesize, GFP_ATOMIC); |
332 | dev_kfree_skb(skb); |
333 | if (skb2 == NULL) { |
334 | priv->stats.tx_dropped++; |
335 | return 0; |
336 | } |
337 | skb = skb2; |
338 | } |
339 | skb_put(skb, min_frame_size - skb->len); |
340 | } |
341 | |
342 | /* Send to right vcc */ |
343 | is_rdesc = 0; |
344 | dst = lec_h->h_dest; |
345 | #ifdef CONFIG_TR |
346 | if (priv->is_trdev) { |
347 | dst = get_tr_dst(skb->data+2, rdesc); |
348 | if (dst == NULL) { |
349 | dst = rdesc; |
350 | is_rdesc = 1; |
351 | } |
352 | } |
353 | #endif |
354 | entry = NULL; |
355 | vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry); |
356 | DPRINTK("%s:vcc:%p vcc_flags:%x, entry:%p\n", dev->name, |
357 | vcc, vcc?vcc->flags:0, entry); |
358 | if (!vcc || !test_bit(ATM_VF_READY,&vcc->flags)) { |
359 | if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) { |
360 | DPRINTK("%s:lec_start_xmit: queuing packet, ", dev->name); |
361 | DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n", |
362 | lec_h->h_dest[0], lec_h->h_dest[1], lec_h->h_dest[2], |
363 | lec_h->h_dest[3], lec_h->h_dest[4], lec_h->h_dest[5]); |
364 | skb_queue_tail(&entry->tx_wait, skb); |
365 | } else { |
366 | DPRINTK("%s:lec_start_xmit: tx queue full or no arp entry, dropping, ", dev->name); |
367 | DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n", |
368 | lec_h->h_dest[0], lec_h->h_dest[1], lec_h->h_dest[2], |
369 | lec_h->h_dest[3], lec_h->h_dest[4], lec_h->h_dest[5]); |
370 | priv->stats.tx_dropped++; |
371 | dev_kfree_skb(skb); |
372 | } |
373 | return 0; |
374 | } |
375 | |
376 | #if DUMP_PACKETS > 0 |
377 | printk("%s:sending to vpi:%d vci:%d\n", dev->name, |
378 | vcc->vpi, vcc->vci); |
379 | #endif /* DUMP_PACKETS > 0 */ |
380 | |
381 | while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) { |
382 | DPRINTK("lec.c: emptying tx queue, "); |
383 | DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n", |
384 | lec_h->h_dest[0], lec_h->h_dest[1], lec_h->h_dest[2], |
385 | lec_h->h_dest[3], lec_h->h_dest[4], lec_h->h_dest[5]); |
386 | lec_send(vcc, skb2, priv); |
387 | } |
388 | |
389 | lec_send(vcc, skb, priv); |
390 | |
391 | if (!atm_may_send(vcc, 0)) { |
392 | struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); |
393 | |
394 | vpriv->xoff = 1; |
395 | netif_stop_queue(dev); |
396 | |
397 | /* |
398 | * vcc->pop() might have occurred in between, making |
399 | * the vcc usuable again. Since xmit is serialized, |
400 | * this is the only situation we have to re-test. |
401 | */ |
402 | |
403 | if (atm_may_send(vcc, 0)) |
404 | netif_wake_queue(dev); |
405 | } |
406 | |
407 | dev->trans_start = jiffies; |
408 | return 0; |
409 | } |
410 | |
411 | /* The inverse routine to net_open(). */ |
412 | static int |
413 | lec_close(struct net_device *dev) |
414 | { |
415 | netif_stop_queue(dev); |
416 | return 0; |
417 | } |
418 | |
419 | /* |
420 | * Get the current statistics. |
421 | * This may be called with the card open or closed. |
422 | */ |
423 | static struct net_device_stats * |
424 | lec_get_stats(struct net_device *dev) |
425 | { |
426 | return &((struct lec_priv *)dev->priv)->stats; |
427 | } |
428 | |
429 | static int |
430 | lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb) |
431 | { |
432 | unsigned long flags; |
433 | struct net_device *dev = (struct net_device*)vcc->proto_data; |
434 | struct lec_priv *priv = (struct lec_priv*)dev->priv; |
435 | struct atmlec_msg *mesg; |
436 | struct lec_arp_table *entry; |
437 | int i; |
438 | char *tmp; /* FIXME */ |
439 | |
440 | atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); |
441 | mesg = (struct atmlec_msg *)skb->data; |
442 | tmp = skb->data; |
443 | tmp += sizeof(struct atmlec_msg); |
444 | DPRINTK("%s: msg from zeppelin:%d\n", dev->name, mesg->type); |
445 | switch(mesg->type) { |
446 | case l_set_mac_addr: |
447 | for (i=0;i<6;i++) { |
448 | dev->dev_addr[i] = mesg->content.normal.mac_addr[i]; |
449 | } |
450 | break; |
451 | case l_del_mac_addr: |
452 | for(i=0;i<6;i++) { |
453 | dev->dev_addr[i] = 0; |
454 | } |
455 | break; |
456 | case l_addr_delete: |
457 | lec_addr_delete(priv, mesg->content.normal.atm_addr, |
458 | mesg->content.normal.flag); |
459 | break; |
460 | case l_topology_change: |
461 | priv->topology_change = mesg->content.normal.flag; |
462 | break; |
463 | case l_flush_complete: |
464 | lec_flush_complete(priv, mesg->content.normal.flag); |
465 | break; |
466 | case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */ |
467 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
468 | entry = lec_arp_find(priv, mesg->content.normal.mac_addr); |
469 | lec_arp_remove(priv, entry); |
470 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
471 | |
472 | if (mesg->content.normal.no_source_le_narp) |
473 | break; |
474 | /* FALL THROUGH */ |
475 | case l_arp_update: |
476 | lec_arp_update(priv, mesg->content.normal.mac_addr, |
477 | mesg->content.normal.atm_addr, |
478 | mesg->content.normal.flag, |
479 | mesg->content.normal.targetless_le_arp); |
480 | DPRINTK("lec: in l_arp_update\n"); |
481 | if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */ |
482 | DPRINTK("lec: LANE2 3.1.5, got tlvs, size %d\n", mesg->sizeoftlvs); |
483 | lane2_associate_ind(dev, |
484 | mesg->content.normal.mac_addr, |
485 | tmp, mesg->sizeoftlvs); |
486 | } |
487 | break; |
488 | case l_config: |
489 | priv->maximum_unknown_frame_count = |
490 | mesg->content.config.maximum_unknown_frame_count; |
491 | priv->max_unknown_frame_time = |
492 | (mesg->content.config.max_unknown_frame_time*HZ); |
493 | priv->max_retry_count = |
494 | mesg->content.config.max_retry_count; |
495 | priv->aging_time = (mesg->content.config.aging_time*HZ); |
496 | priv->forward_delay_time = |
497 | (mesg->content.config.forward_delay_time*HZ); |
498 | priv->arp_response_time = |
499 | (mesg->content.config.arp_response_time*HZ); |
500 | priv->flush_timeout = (mesg->content.config.flush_timeout*HZ); |
501 | priv->path_switching_delay = |
502 | (mesg->content.config.path_switching_delay*HZ); |
503 | priv->lane_version = mesg->content.config.lane_version; /* LANE2 */ |
504 | priv->lane2_ops = NULL; |
505 | if (priv->lane_version > 1) |
506 | priv->lane2_ops = &lane2_ops; |
507 | if (dev->change_mtu(dev, mesg->content.config.mtu)) |
508 | printk("%s: change_mtu to %d failed\n", dev->name, |
509 | mesg->content.config.mtu); |
510 | priv->is_proxy = mesg->content.config.is_proxy; |
511 | break; |
512 | case l_flush_tran_id: |
513 | lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr, |
514 | mesg->content.normal.flag); |
515 | break; |
516 | case l_set_lecid: |
517 | priv->lecid=(unsigned short)(0xffff&mesg->content.normal.flag); |
518 | break; |
519 | case l_should_bridge: { |
520 | #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) |
521 | struct net_bridge_fdb_entry *f; |
522 | |
523 | DPRINTK("%s: bridge zeppelin asks about 0x%02x:%02x:%02x:%02x:%02x:%02x\n", |
524 | dev->name, |
525 | mesg->content.proxy.mac_addr[0], mesg->content.proxy.mac_addr[1], |
526 | mesg->content.proxy.mac_addr[2], mesg->content.proxy.mac_addr[3], |
527 | mesg->content.proxy.mac_addr[4], mesg->content.proxy.mac_addr[5]); |
528 | |
529 | if (br_fdb_get_hook == NULL || dev->br_port == NULL) |
530 | break; |
531 | |
532 | f = br_fdb_get_hook(dev->br_port->br, mesg->content.proxy.mac_addr); |
533 | if (f != NULL && |
534 | f->dst->dev != dev && |
535 | f->dst->state == BR_STATE_FORWARDING) { |
536 | /* hit from bridge table, send LE_ARP_RESPONSE */ |
537 | struct sk_buff *skb2; |
538 | struct sock *sk; |
539 | |
540 | DPRINTK("%s: entry found, responding to zeppelin\n", dev->name); |
541 | skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); |
542 | if (skb2 == NULL) { |
543 | br_fdb_put_hook(f); |
544 | break; |
545 | } |
546 | skb2->len = sizeof(struct atmlec_msg); |
547 | memcpy(skb2->data, mesg, sizeof(struct atmlec_msg)); |
548 | atm_force_charge(priv->lecd, skb2->truesize); |
549 | sk = sk_atm(priv->lecd); |
550 | skb_queue_tail(&sk->sk_receive_queue, skb2); |
551 | sk->sk_data_ready(sk, skb2->len); |
552 | } |
553 | if (f != NULL) br_fdb_put_hook(f); |
554 | #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */ |
555 | } |
556 | break; |
557 | default: |
558 | printk("%s: Unknown message type %d\n", dev->name, mesg->type); |
559 | dev_kfree_skb(skb); |
560 | return -EINVAL; |
561 | } |
562 | dev_kfree_skb(skb); |
563 | return 0; |
564 | } |
565 | |
566 | static void |
567 | lec_atm_close(struct atm_vcc *vcc) |
568 | { |
569 | struct sk_buff *skb; |
570 | struct net_device *dev = (struct net_device *)vcc->proto_data; |
571 | struct lec_priv *priv = (struct lec_priv *)dev->priv; |
572 | |
573 | priv->lecd = NULL; |
574 | /* Do something needful? */ |
575 | |
576 | netif_stop_queue(dev); |
577 | lec_arp_destroy(priv); |
578 | |
579 | if (skb_peek(&sk_atm(vcc)->sk_receive_queue)) |
580 | printk("%s lec_atm_close: closing with messages pending\n", |
581 | dev->name); |
582 | while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue)) != NULL) { |
583 | atm_return(vcc, skb->truesize); |
584 | dev_kfree_skb(skb); |
585 | } |
586 | |
587 | printk("%s: Shut down!\n", dev->name); |
588 | module_put(THIS_MODULE); |
589 | } |
590 | |
591 | static struct atmdev_ops lecdev_ops = { |
592 | .close = lec_atm_close, |
593 | .send = lec_atm_send |
594 | }; |
595 | |
596 | static struct atm_dev lecatm_dev = { |
597 | .ops = &lecdev_ops, |
598 | .type = "lec", |
599 | .number = 999, /* dummy device number */ |
600 | .lock = SPIN_LOCK_UNLOCKED |
601 | }; |
602 | |
603 | /* |
604 | * LANE2: new argument struct sk_buff *data contains |
605 | * the LE_ARP based TLVs introduced in the LANE2 spec |
606 | */ |
607 | static int |
608 | send_to_lecd(struct lec_priv *priv, atmlec_msg_type type, |
609 | unsigned char *mac_addr, unsigned char *atm_addr, |
610 | struct sk_buff *data) |
611 | { |
612 | struct sock *sk; |
613 | struct sk_buff *skb; |
614 | struct atmlec_msg *mesg; |
615 | |
616 | if (!priv || !priv->lecd) { |
617 | return -1; |
618 | } |
619 | skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); |
620 | if (!skb) |
621 | return -1; |
622 | skb->len = sizeof(struct atmlec_msg); |
623 | mesg = (struct atmlec_msg *)skb->data; |
624 | memset(mesg, 0, sizeof(struct atmlec_msg)); |
625 | mesg->type = type; |
626 | if (data != NULL) |
627 | mesg->sizeoftlvs = data->len; |
628 | if (mac_addr) |
629 | memcpy(&mesg->content.normal.mac_addr, mac_addr, ETH_ALEN); |
630 | else |
631 | mesg->content.normal.targetless_le_arp = 1; |
632 | if (atm_addr) |
633 | memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN); |
634 | |
635 | atm_force_charge(priv->lecd, skb->truesize); |
636 | sk = sk_atm(priv->lecd); |
637 | skb_queue_tail(&sk->sk_receive_queue, skb); |
638 | sk->sk_data_ready(sk, skb->len); |
639 | |
640 | if (data != NULL) { |
641 | DPRINTK("lec: about to send %d bytes of data\n", data->len); |
642 | atm_force_charge(priv->lecd, data->truesize); |
643 | skb_queue_tail(&sk->sk_receive_queue, data); |
644 | sk->sk_data_ready(sk, skb->len); |
645 | } |
646 | |
647 | return 0; |
648 | } |
649 | |
650 | /* shamelessly stolen from drivers/net/net_init.c */ |
651 | static int lec_change_mtu(struct net_device *dev, int new_mtu) |
652 | { |
653 | if ((new_mtu < 68) || (new_mtu > 18190)) |
654 | return -EINVAL; |
655 | dev->mtu = new_mtu; |
656 | return 0; |
657 | } |
658 | |
659 | static void lec_set_multicast_list(struct net_device *dev) |
660 | { |
661 | /* by default, all multicast frames arrive over the bus. |
662 | * eventually support selective multicast service |
663 | */ |
664 | return; |
665 | } |
666 | |
667 | static void |
668 | lec_init(struct net_device *dev) |
669 | { |
670 | dev->change_mtu = lec_change_mtu; |
671 | dev->open = lec_open; |
672 | dev->stop = lec_close; |
673 | dev->hard_start_xmit = lec_start_xmit; |
674 | dev->tx_timeout = lec_tx_timeout; |
675 | |
676 | dev->get_stats = lec_get_stats; |
677 | dev->set_multicast_list = lec_set_multicast_list; |
678 | dev->do_ioctl = NULL; |
679 | printk("%s: Initialized!\n",dev->name); |
680 | return; |
681 | } |
682 | |
683 | static unsigned char lec_ctrl_magic[] = { |
684 | 0xff, |
685 | 0x00, |
686 | 0x01, |
687 | 0x01 }; |
688 | |
689 | static void |
690 | lec_push(struct atm_vcc *vcc, struct sk_buff *skb) |
691 | { |
692 | struct net_device *dev = (struct net_device *)vcc->proto_data; |
693 | struct lec_priv *priv = (struct lec_priv *)dev->priv; |
694 | |
695 | #if DUMP_PACKETS >0 |
696 | int i=0; |
697 | char buf[300]; |
698 | |
699 | printk("%s: lec_push vcc vpi:%d vci:%d\n", dev->name, |
700 | vcc->vpi, vcc->vci); |
701 | #endif |
702 | if (!skb) { |
703 | DPRINTK("%s: null skb\n",dev->name); |
704 | lec_vcc_close(priv, vcc); |
705 | return; |
706 | } |
707 | #if DUMP_PACKETS > 0 |
708 | printk("%s: rcv datalen:%ld lecid:%4.4x\n", dev->name, |
709 | skb->len, priv->lecid); |
710 | #if DUMP_PACKETS >= 2 |
711 | for(i=0;i<skb->len && i <99;i++) { |
712 | sprintf(buf+i*3,"%2.2x ",0xff&skb->data[i]); |
713 | } |
714 | #elif DUMP_PACKETS >= 1 |
715 | for(i=0;i<skb->len && i < 30;i++) { |
716 | sprintf(buf+i*3,"%2.2x ", 0xff&skb->data[i]); |
717 | } |
718 | #endif /* DUMP_PACKETS >= 1 */ |
719 | if (i==skb->len) |
720 | printk("%s\n",buf); |
721 | else |
722 | printk("%s...\n",buf); |
723 | #endif /* DUMP_PACKETS > 0 */ |
724 | if (memcmp(skb->data, lec_ctrl_magic, 4) ==0) { /* Control frame, to daemon*/ |
725 | struct sock *sk = sk_atm(vcc); |
726 | |
727 | DPRINTK("%s: To daemon\n",dev->name); |
728 | skb_queue_tail(&sk->sk_receive_queue, skb); |
729 | sk->sk_data_ready(sk, skb->len); |
730 | } else { /* Data frame, queue to protocol handlers */ |
731 | unsigned char *dst; |
732 | |
733 | atm_return(vcc,skb->truesize); |
734 | if (*(uint16_t *)skb->data == htons(priv->lecid) || |
735 | !priv->lecd || |
736 | !(dev->flags & IFF_UP)) { |
737 | /* Probably looping back, or if lecd is missing, |
738 | lecd has gone down */ |
739 | DPRINTK("Ignoring frame...\n"); |
740 | dev_kfree_skb(skb); |
741 | return; |
742 | } |
743 | #ifdef CONFIG_TR |
744 | if (priv->is_trdev) dst = ((struct lecdatahdr_8025 *)skb->data)->h_dest; |
745 | else |
746 | #endif |
747 | dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest; |
748 | |
749 | if (!(dst[0]&0x01) && /* Never filter Multi/Broadcast */ |
750 | !priv->is_proxy && /* Proxy wants all the packets */ |
751 | memcmp(dst, dev->dev_addr, dev->addr_len)) { |
752 | dev_kfree_skb(skb); |
753 | return; |
754 | } |
755 | if (priv->lec_arp_empty_ones) { |
756 | lec_arp_check_empties(priv, vcc, skb); |
757 | } |
758 | skb->dev = dev; |
759 | skb_pull(skb, 2); /* skip lec_id */ |
760 | #ifdef CONFIG_TR |
761 | if (priv->is_trdev) skb->protocol = tr_type_trans(skb, dev); |
762 | else |
763 | #endif |
764 | skb->protocol = eth_type_trans(skb, dev); |
765 | priv->stats.rx_packets++; |
766 | priv->stats.rx_bytes += skb->len; |
767 | memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); |
768 | netif_rx(skb); |
769 | } |
770 | } |
771 | |
772 | static void |
773 | lec_pop(struct atm_vcc *vcc, struct sk_buff *skb) |
774 | { |
775 | struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); |
776 | struct net_device *dev = skb->dev; |
777 | |
778 | if (vpriv == NULL) { |
779 | printk("lec_pop(): vpriv = NULL!?!?!?\n"); |
780 | return; |
781 | } |
782 | |
783 | vpriv->old_pop(vcc, skb); |
784 | |
785 | if (vpriv->xoff && atm_may_send(vcc, 0)) { |
786 | vpriv->xoff = 0; |
787 | if (netif_running(dev) && netif_queue_stopped(dev)) |
788 | netif_wake_queue(dev); |
789 | } |
790 | } |
791 | |
792 | static int |
793 | lec_vcc_attach(struct atm_vcc *vcc, void __user *arg) |
794 | { |
795 | struct lec_vcc_priv *vpriv; |
796 | int bytes_left; |
797 | struct atmlec_ioc ioc_data; |
798 | |
799 | /* Lecd must be up in this case */ |
800 | bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc)); |
801 | if (bytes_left != 0) { |
802 | printk("lec: lec_vcc_attach, copy from user failed for %d bytes\n", |
803 | bytes_left); |
804 | } |
805 | if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF || |
806 | !dev_lec[ioc_data.dev_num]) |
807 | return -EINVAL; |
808 | if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL))) |
809 | return -ENOMEM; |
810 | vpriv->xoff = 0; |
811 | vpriv->old_pop = vcc->pop; |
812 | vcc->user_back = vpriv; |
813 | vcc->pop = lec_pop; |
814 | lec_vcc_added(dev_lec[ioc_data.dev_num]->priv, |
815 | &ioc_data, vcc, vcc->push); |
816 | vcc->proto_data = dev_lec[ioc_data.dev_num]; |
817 | vcc->push = lec_push; |
818 | return 0; |
819 | } |
820 | |
821 | static int |
822 | lec_mcast_attach(struct atm_vcc *vcc, int arg) |
823 | { |
824 | if (arg <0 || arg >= MAX_LEC_ITF || !dev_lec[arg]) |
825 | return -EINVAL; |
826 | vcc->proto_data = dev_lec[arg]; |
827 | return (lec_mcast_make((struct lec_priv*)dev_lec[arg]->priv, vcc)); |
828 | } |
829 | |
830 | /* Initialize device. */ |
831 | static int |
832 | lecd_attach(struct atm_vcc *vcc, int arg) |
833 | { |
834 | int i; |
835 | struct lec_priv *priv; |
836 | |
837 | if (arg<0) |
838 | i = 0; |
839 | else |
840 | i = arg; |
841 | #ifdef CONFIG_TR |
842 | if (arg >= MAX_LEC_ITF) |
843 | return -EINVAL; |
844 | #else /* Reserve the top NUM_TR_DEVS for TR */ |
845 | if (arg >= (MAX_LEC_ITF-NUM_TR_DEVS)) |
846 | return -EINVAL; |
847 | #endif |
848 | if (!dev_lec[i]) { |
849 | int is_trdev, size; |
850 | |
851 | is_trdev = 0; |
852 | if (i >= (MAX_LEC_ITF - NUM_TR_DEVS)) |
853 | is_trdev = 1; |
854 | |
855 | size = sizeof(struct lec_priv); |
856 | #ifdef CONFIG_TR |
857 | if (is_trdev) |
858 | dev_lec[i] = alloc_trdev(size); |
859 | else |
860 | #endif |
861 | dev_lec[i] = alloc_etherdev(size); |
862 | if (!dev_lec[i]) |
863 | return -ENOMEM; |
864 | snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i); |
865 | if (register_netdev(dev_lec[i])) { |
866 | free_netdev(dev_lec[i]); |
867 | return -EINVAL; |
868 | } |
869 | |
870 | priv = dev_lec[i]->priv; |
871 | priv->is_trdev = is_trdev; |
872 | lec_init(dev_lec[i]); |
873 | } else { |
874 | priv = dev_lec[i]->priv; |
875 | if (priv->lecd) |
876 | return -EADDRINUSE; |
877 | } |
878 | lec_arp_init(priv); |
879 | priv->itfnum = i; /* LANE2 addition */ |
880 | priv->lecd = vcc; |
881 | vcc->dev = &lecatm_dev; |
882 | vcc_insert_socket(sk_atm(vcc)); |
883 | |
884 | vcc->proto_data = dev_lec[i]; |
885 | set_bit(ATM_VF_META,&vcc->flags); |
886 | set_bit(ATM_VF_READY,&vcc->flags); |
887 | |
888 | /* Set default values to these variables */ |
889 | priv->maximum_unknown_frame_count = 1; |
890 | priv->max_unknown_frame_time = (1*HZ); |
891 | priv->vcc_timeout_period = (1200*HZ); |
892 | priv->max_retry_count = 1; |
893 | priv->aging_time = (300*HZ); |
894 | priv->forward_delay_time = (15*HZ); |
895 | priv->topology_change = 0; |
896 | priv->arp_response_time = (1*HZ); |
897 | priv->flush_timeout = (4*HZ); |
898 | priv->path_switching_delay = (6*HZ); |
899 | |
900 | if (dev_lec[i]->flags & IFF_UP) { |
901 | netif_start_queue(dev_lec[i]); |
902 | } |
903 | __module_get(THIS_MODULE); |
904 | return i; |
905 | } |
906 | |
907 | #ifdef CONFIG_PROC_FS |
908 | static char* lec_arp_get_status_string(unsigned char status) |
909 | { |
910 | static char *lec_arp_status_string[] = { |
911 | "ESI_UNKNOWN ", |
912 | "ESI_ARP_PENDING ", |
913 | "ESI_VC_PENDING ", |
914 | "<Undefined> ", |
915 | "ESI_FLUSH_PENDING ", |
916 | "ESI_FORWARD_DIRECT" |
917 | }; |
918 | |
919 | if (status > ESI_FORWARD_DIRECT) |
920 | status = 3; /* ESI_UNDEFINED */ |
921 | return lec_arp_status_string[status]; |
922 | } |
923 | |
924 | static void lec_info(struct seq_file *seq, struct lec_arp_table *entry) |
925 | { |
926 | int i; |
927 | |
928 | for (i = 0; i < ETH_ALEN; i++) |
929 | seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff); |
930 | seq_printf(seq, " "); |
931 | for (i = 0; i < ATM_ESA_LEN; i++) |
932 | seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff); |
933 | seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status), |
934 | entry->flags & 0xffff); |
935 | if (entry->vcc) |
936 | seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci); |
937 | else |
938 | seq_printf(seq, " "); |
939 | if (entry->recv_vcc) { |
940 | seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi, |
941 | entry->recv_vcc->vci); |
942 | } |
943 | seq_putc(seq, '\n'); |
944 | } |
945 | |
946 | |
947 | struct lec_state { |
948 | unsigned long flags; |
949 | struct lec_priv *locked; |
950 | struct lec_arp_table *entry; |
951 | struct net_device *dev; |
952 | int itf; |
953 | int arp_table; |
954 | int misc_table; |
955 | }; |
956 | |
957 | static void *lec_tbl_walk(struct lec_state *state, struct lec_arp_table *tbl, |
958 | loff_t *l) |
959 | { |
960 | struct lec_arp_table *e = state->entry; |
961 | |
962 | if (!e) |
963 | e = tbl; |
964 | if (e == (void *)1) { |
965 | e = tbl; |
966 | --*l; |
967 | } |
968 | for (; e; e = e->next) { |
969 | if (--*l < 0) |
970 | break; |
971 | } |
972 | state->entry = e; |
973 | return (*l < 0) ? state : NULL; |
974 | } |
975 | |
976 | static void *lec_arp_walk(struct lec_state *state, loff_t *l, |
977 | struct lec_priv *priv) |
978 | { |
979 | void *v = NULL; |
980 | int p; |
981 | |
982 | for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) { |
983 | v = lec_tbl_walk(state, priv->lec_arp_tables[p], l); |
984 | if (v) |
985 | break; |
986 | } |
987 | state->arp_table = p; |
988 | return v; |
989 | } |
990 | |
991 | static void *lec_misc_walk(struct lec_state *state, loff_t *l, |
992 | struct lec_priv *priv) |
993 | { |
994 | struct lec_arp_table *lec_misc_tables[] = { |
995 | priv->lec_arp_empty_ones, |
996 | priv->lec_no_forward, |
997 | priv->mcast_fwds |
998 | }; |
999 | void *v = NULL; |
1000 | int q; |
1001 | |
1002 | for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) { |
1003 | v = lec_tbl_walk(state, lec_misc_tables[q], l); |
1004 | if (v) |
1005 | break; |
1006 | } |
1007 | state->misc_table = q; |
1008 | return v; |
1009 | } |
1010 | |
1011 | static void *lec_priv_walk(struct lec_state *state, loff_t *l, |
1012 | struct lec_priv *priv) |
1013 | { |
1014 | if (!state->locked) { |
1015 | state->locked = priv; |
1016 | spin_lock_irqsave(&priv->lec_arp_lock, state->flags); |
1017 | } |
1018 | if (!lec_arp_walk(state, l, priv) && |
1019 | !lec_misc_walk(state, l, priv)) { |
1020 | spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags); |
1021 | state->locked = NULL; |
1022 | /* Partial state reset for the next time we get called */ |
1023 | state->arp_table = state->misc_table = 0; |
1024 | } |
1025 | return state->locked; |
1026 | } |
1027 | |
1028 | static void *lec_itf_walk(struct lec_state *state, loff_t *l) |
1029 | { |
1030 | struct net_device *dev; |
1031 | void *v; |
1032 | |
1033 | dev = state->dev ? state->dev : dev_lec[state->itf]; |
1034 | v = (dev && dev->priv) ? lec_priv_walk(state, l, dev->priv) : NULL; |
1035 | if (!v && dev) { |
1036 | dev_put(dev); |
1037 | /* Partial state reset for the next time we get called */ |
1038 | dev = NULL; |
1039 | } |
1040 | state->dev = dev; |
1041 | return v; |
1042 | } |
1043 | |
1044 | static void *lec_get_idx(struct lec_state *state, loff_t l) |
1045 | { |
1046 | void *v = NULL; |
1047 | |
1048 | for (; state->itf < MAX_LEC_ITF; state->itf++) { |
1049 | v = lec_itf_walk(state, &l); |
1050 | if (v) |
1051 | break; |
1052 | } |
1053 | return v; |
1054 | } |
1055 | |
1056 | static void *lec_seq_start(struct seq_file *seq, loff_t *pos) |
1057 | { |
1058 | struct lec_state *state = seq->private; |
1059 | |
1060 | state->itf = 0; |
1061 | state->dev = NULL; |
1062 | state->locked = NULL; |
1063 | state->arp_table = 0; |
1064 | state->misc_table = 0; |
1065 | state->entry = (void *)1; |
1066 | |
1067 | return *pos ? lec_get_idx(state, *pos) : (void*)1; |
1068 | } |
1069 | |
1070 | static void lec_seq_stop(struct seq_file *seq, void *v) |
1071 | { |
1072 | struct lec_state *state = seq->private; |
1073 | |
1074 | if (state->dev) { |
1075 | spin_unlock_irqrestore(&state->locked->lec_arp_lock, |
1076 | state->flags); |
1077 | dev_put(state->dev); |
1078 | } |
1079 | } |
1080 | |
1081 | static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
1082 | { |
1083 | struct lec_state *state = seq->private; |
1084 | |
1085 | v = lec_get_idx(state, 1); |
1086 | *pos += !!PTR_ERR(v); |
1087 | return v; |
1088 | } |
1089 | |
1090 | static int lec_seq_show(struct seq_file *seq, void *v) |
1091 | { |
1092 | static char lec_banner[] = "Itf MAC ATM destination" |
1093 | " Status Flags " |
1094 | "VPI/VCI Recv VPI/VCI\n"; |
1095 | |
1096 | if (v == (void *)1) |
1097 | seq_puts(seq, lec_banner); |
1098 | else { |
1099 | struct lec_state *state = seq->private; |
1100 | struct net_device *dev = state->dev; |
1101 | |
1102 | seq_printf(seq, "%s ", dev->name); |
1103 | lec_info(seq, state->entry); |
1104 | } |
1105 | return 0; |
1106 | } |
1107 | |
1108 | static struct seq_operations lec_seq_ops = { |
1109 | .start = lec_seq_start, |
1110 | .next = lec_seq_next, |
1111 | .stop = lec_seq_stop, |
1112 | .show = lec_seq_show, |
1113 | }; |
1114 | |
1115 | static int lec_seq_open(struct inode *inode, struct file *file) |
1116 | { |
1117 | struct lec_state *state; |
1118 | struct seq_file *seq; |
1119 | int rc = -EAGAIN; |
1120 | |
1121 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
1122 | if (!state) { |
1123 | rc = -ENOMEM; |
1124 | goto out; |
1125 | } |
1126 | |
1127 | rc = seq_open(file, &lec_seq_ops); |
1128 | if (rc) |
1129 | goto out_kfree; |
1130 | seq = file->private_data; |
1131 | seq->private = state; |
1132 | out: |
1133 | return rc; |
1134 | |
1135 | out_kfree: |
1136 | kfree(state); |
1137 | goto out; |
1138 | } |
1139 | |
1140 | static int lec_seq_release(struct inode *inode, struct file *file) |
1141 | { |
1142 | return seq_release_private(inode, file); |
1143 | } |
1144 | |
1145 | static struct file_operations lec_seq_fops = { |
1146 | .owner = THIS_MODULE, |
1147 | .open = lec_seq_open, |
1148 | .read = seq_read, |
1149 | .llseek = seq_lseek, |
1150 | .release = lec_seq_release, |
1151 | }; |
1152 | #endif |
1153 | |
1154 | static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
1155 | { |
1156 | struct atm_vcc *vcc = ATM_SD(sock); |
1157 | int err = 0; |
1158 | |
1159 | switch (cmd) { |
1160 | case ATMLEC_CTRL: |
1161 | case ATMLEC_MCAST: |
1162 | case ATMLEC_DATA: |
1163 | if (!capable(CAP_NET_ADMIN)) |
1164 | return -EPERM; |
1165 | break; |
1166 | default: |
1167 | return -ENOIOCTLCMD; |
1168 | } |
1169 | |
1170 | switch (cmd) { |
1171 | case ATMLEC_CTRL: |
1172 | err = lecd_attach(vcc, (int) arg); |
1173 | if (err >= 0) |
1174 | sock->state = SS_CONNECTED; |
1175 | break; |
1176 | case ATMLEC_MCAST: |
1177 | err = lec_mcast_attach(vcc, (int) arg); |
1178 | break; |
1179 | case ATMLEC_DATA: |
1180 | err = lec_vcc_attach(vcc, (void __user *) arg); |
1181 | break; |
1182 | } |
1183 | |
1184 | return err; |
1185 | } |
1186 | |
1187 | static struct atm_ioctl lane_ioctl_ops = { |
1188 | .owner = THIS_MODULE, |
1189 | .ioctl = lane_ioctl, |
1190 | }; |
1191 | |
1192 | static int __init lane_module_init(void) |
1193 | { |
1194 | #ifdef CONFIG_PROC_FS |
1195 | struct proc_dir_entry *p; |
1196 | |
1197 | p = create_proc_entry("lec", S_IRUGO, atm_proc_root); |
1198 | if (p) |
1199 | p->proc_fops = &lec_seq_fops; |
1200 | #endif |
1201 | |
1202 | register_atm_ioctl(&lane_ioctl_ops); |
1203 | printk("lec.c: " __DATE__ " " __TIME__ " initialized\n"); |
1204 | return 0; |
1205 | } |
1206 | |
1207 | static void __exit lane_module_cleanup(void) |
1208 | { |
1209 | int i; |
1210 | struct lec_priv *priv; |
1211 | |
1212 | remove_proc_entry("lec", atm_proc_root); |
1213 | |
1214 | deregister_atm_ioctl(&lane_ioctl_ops); |
1215 | |
1216 | for (i = 0; i < MAX_LEC_ITF; i++) { |
1217 | if (dev_lec[i] != NULL) { |
1218 | priv = (struct lec_priv *)dev_lec[i]->priv; |
1219 | unregister_netdev(dev_lec[i]); |
1220 | free_netdev(dev_lec[i]); |
1221 | dev_lec[i] = NULL; |
1222 | } |
1223 | } |
1224 | |
1225 | return; |
1226 | } |
1227 | |
1228 | module_init(lane_module_init); |
1229 | module_exit(lane_module_cleanup); |
1230 | |
1231 | /* |
1232 | * LANE2: 3.1.3, LE_RESOLVE.request |
1233 | * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs. |
1234 | * If sizeoftlvs == NULL the default TLVs associated with with this |
1235 | * lec will be used. |
1236 | * If dst_mac == NULL, targetless LE_ARP will be sent |
1237 | */ |
1238 | static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force, |
1239 | u8 **tlvs, u32 *sizeoftlvs) |
1240 | { |
1241 | unsigned long flags; |
1242 | struct lec_priv *priv = (struct lec_priv *)dev->priv; |
1243 | struct lec_arp_table *table; |
1244 | struct sk_buff *skb; |
1245 | int retval; |
1246 | |
1247 | if (force == 0) { |
1248 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1249 | table = lec_arp_find(priv, dst_mac); |
1250 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1251 | if(table == NULL) |
1252 | return -1; |
1253 | |
1254 | *tlvs = kmalloc(table->sizeoftlvs, GFP_ATOMIC); |
1255 | if (*tlvs == NULL) |
1256 | return -1; |
1257 | |
1258 | memcpy(*tlvs, table->tlvs, table->sizeoftlvs); |
1259 | *sizeoftlvs = table->sizeoftlvs; |
1260 | |
1261 | return 0; |
1262 | } |
1263 | |
1264 | if (sizeoftlvs == NULL) |
1265 | retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL); |
1266 | |
1267 | else { |
1268 | skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC); |
1269 | if (skb == NULL) |
1270 | return -1; |
1271 | skb->len = *sizeoftlvs; |
1272 | memcpy(skb->data, *tlvs, *sizeoftlvs); |
1273 | retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb); |
1274 | } |
1275 | return retval; |
1276 | } |
1277 | |
1278 | |
1279 | /* |
1280 | * LANE2: 3.1.4, LE_ASSOCIATE.request |
1281 | * Associate the *tlvs with the *lan_dst address. |
1282 | * Will overwrite any previous association |
1283 | * Returns 1 for success, 0 for failure (out of memory) |
1284 | * |
1285 | */ |
1286 | static int lane2_associate_req (struct net_device *dev, u8 *lan_dst, |
1287 | u8 *tlvs, u32 sizeoftlvs) |
1288 | { |
1289 | int retval; |
1290 | struct sk_buff *skb; |
1291 | struct lec_priv *priv = (struct lec_priv*)dev->priv; |
1292 | |
1293 | if ( memcmp(lan_dst, dev->dev_addr, ETH_ALEN) != 0 ) |
1294 | return (0); /* not our mac address */ |
1295 | |
1296 | kfree(priv->tlvs); /* NULL if there was no previous association */ |
1297 | |
1298 | priv->tlvs = kmalloc(sizeoftlvs, GFP_KERNEL); |
1299 | if (priv->tlvs == NULL) |
1300 | return (0); |
1301 | priv->sizeoftlvs = sizeoftlvs; |
1302 | memcpy(priv->tlvs, tlvs, sizeoftlvs); |
1303 | |
1304 | skb = alloc_skb(sizeoftlvs, GFP_ATOMIC); |
1305 | if (skb == NULL) |
1306 | return 0; |
1307 | skb->len = sizeoftlvs; |
1308 | memcpy(skb->data, tlvs, sizeoftlvs); |
1309 | retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb); |
1310 | if (retval != 0) |
1311 | printk("lec.c: lane2_associate_req() failed\n"); |
1312 | /* If the previous association has changed we must |
1313 | * somehow notify other LANE entities about the change |
1314 | */ |
1315 | return (1); |
1316 | } |
1317 | |
1318 | /* |
1319 | * LANE2: 3.1.5, LE_ASSOCIATE.indication |
1320 | * |
1321 | */ |
1322 | static void lane2_associate_ind (struct net_device *dev, u8 *mac_addr, |
1323 | u8 *tlvs, u32 sizeoftlvs) |
1324 | { |
1325 | #if 0 |
1326 | int i = 0; |
1327 | #endif |
1328 | struct lec_priv *priv = (struct lec_priv *)dev->priv; |
1329 | #if 0 /* Why have the TLVs in LE_ARP entries since we do not use them? When you |
1330 | uncomment this code, make sure the TLVs get freed when entry is killed */ |
1331 | struct lec_arp_table *entry = lec_arp_find(priv, mac_addr); |
1332 | |
1333 | if (entry == NULL) |
1334 | return; /* should not happen */ |
1335 | |
1336 | kfree(entry->tlvs); |
1337 | |
1338 | entry->tlvs = kmalloc(sizeoftlvs, GFP_KERNEL); |
1339 | if (entry->tlvs == NULL) |
1340 | return; |
1341 | |
1342 | entry->sizeoftlvs = sizeoftlvs; |
1343 | memcpy(entry->tlvs, tlvs, sizeoftlvs); |
1344 | #endif |
1345 | #if 0 |
1346 | printk("lec.c: lane2_associate_ind()\n"); |
1347 | printk("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs); |
1348 | while (i < sizeoftlvs) |
1349 | printk("%02x ", tlvs[i++]); |
1350 | |
1351 | printk("\n"); |
1352 | #endif |
1353 | |
1354 | /* tell MPOA about the TLVs we saw */ |
1355 | if (priv->lane2_ops && priv->lane2_ops->associate_indicator) { |
1356 | priv->lane2_ops->associate_indicator(dev, mac_addr, |
1357 | tlvs, sizeoftlvs); |
1358 | } |
1359 | return; |
1360 | } |
1361 | |
1362 | /* |
1363 | * Here starts what used to lec_arpc.c |
1364 | * |
1365 | * lec_arpc.c was added here when making |
1366 | * lane client modular. October 1997 |
1367 | * |
1368 | */ |
1369 | |
1370 | #include <linux/types.h> |
1371 | #include <linux/sched.h> |
1372 | #include <linux/timer.h> |
1373 | #include <asm/param.h> |
1374 | #include <asm/atomic.h> |
1375 | #include <linux/inetdevice.h> |
1376 | #include <net/route.h> |
1377 | |
1378 | |
1379 | #if 0 |
1380 | #define DPRINTK(format,args...) |
1381 | /* |
1382 | #define DPRINTK printk |
1383 | */ |
1384 | #endif |
1385 | #define DEBUG_ARP_TABLE 0 |
1386 | |
1387 | #define LEC_ARP_REFRESH_INTERVAL (3*HZ) |
1388 | |
1389 | static void lec_arp_check_expire(unsigned long data); |
1390 | static void lec_arp_expire_arp(unsigned long data); |
1391 | |
1392 | /* |
1393 | * Arp table funcs |
1394 | */ |
1395 | |
1396 | #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE -1)) |
1397 | |
1398 | /* |
1399 | * Initialization of arp-cache |
1400 | */ |
1401 | static void |
1402 | lec_arp_init(struct lec_priv *priv) |
1403 | { |
1404 | unsigned short i; |
1405 | |
1406 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
1407 | priv->lec_arp_tables[i] = NULL; |
1408 | } |
1409 | spin_lock_init(&priv->lec_arp_lock); |
1410 | init_timer(&priv->lec_arp_timer); |
1411 | priv->lec_arp_timer.expires = jiffies + LEC_ARP_REFRESH_INTERVAL; |
1412 | priv->lec_arp_timer.data = (unsigned long)priv; |
1413 | priv->lec_arp_timer.function = lec_arp_check_expire; |
1414 | add_timer(&priv->lec_arp_timer); |
1415 | } |
1416 | |
1417 | static void |
1418 | lec_arp_clear_vccs(struct lec_arp_table *entry) |
1419 | { |
1420 | if (entry->vcc) { |
1421 | struct atm_vcc *vcc = entry->vcc; |
1422 | struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); |
1423 | struct net_device *dev = (struct net_device*) vcc->proto_data; |
1424 | |
1425 | vcc->pop = vpriv->old_pop; |
1426 | if (vpriv->xoff) |
1427 | netif_wake_queue(dev); |
1428 | kfree(vpriv); |
1429 | vcc->user_back = NULL; |
1430 | vcc->push = entry->old_push; |
1431 | vcc_release_async(vcc, -EPIPE); |
1432 | vcc = NULL; |
1433 | } |
1434 | if (entry->recv_vcc) { |
1435 | entry->recv_vcc->push = entry->old_recv_push; |
1436 | vcc_release_async(entry->recv_vcc, -EPIPE); |
1437 | entry->recv_vcc = NULL; |
1438 | } |
1439 | } |
1440 | |
1441 | /* |
1442 | * Insert entry to lec_arp_table |
1443 | * LANE2: Add to the end of the list to satisfy 8.1.13 |
1444 | */ |
1445 | static inline void |
1446 | lec_arp_add(struct lec_priv *priv, struct lec_arp_table *to_add) |
1447 | { |
1448 | unsigned short place; |
1449 | struct lec_arp_table *tmp; |
1450 | |
1451 | place = HASH(to_add->mac_addr[ETH_ALEN-1]); |
1452 | tmp = priv->lec_arp_tables[place]; |
1453 | to_add->next = NULL; |
1454 | if (tmp == NULL) |
1455 | priv->lec_arp_tables[place] = to_add; |
1456 | |
1457 | else { /* add to the end */ |
1458 | while (tmp->next) |
1459 | tmp = tmp->next; |
1460 | tmp->next = to_add; |
1461 | } |
1462 | |
1463 | DPRINTK("LEC_ARP: Added entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n", |
1464 | 0xff&to_add->mac_addr[0], 0xff&to_add->mac_addr[1], |
1465 | 0xff&to_add->mac_addr[2], 0xff&to_add->mac_addr[3], |
1466 | 0xff&to_add->mac_addr[4], 0xff&to_add->mac_addr[5]); |
1467 | } |
1468 | |
1469 | /* |
1470 | * Remove entry from lec_arp_table |
1471 | */ |
1472 | static int |
1473 | lec_arp_remove(struct lec_priv *priv, |
1474 | struct lec_arp_table *to_remove) |
1475 | { |
1476 | unsigned short place; |
1477 | struct lec_arp_table *tmp; |
1478 | int remove_vcc=1; |
1479 | |
1480 | if (!to_remove) { |
1481 | return -1; |
1482 | } |
1483 | place = HASH(to_remove->mac_addr[ETH_ALEN-1]); |
1484 | tmp = priv->lec_arp_tables[place]; |
1485 | if (tmp == to_remove) { |
1486 | priv->lec_arp_tables[place] = tmp->next; |
1487 | } else { |
1488 | while(tmp && tmp->next != to_remove) { |
1489 | tmp = tmp->next; |
1490 | } |
1491 | if (!tmp) {/* Entry was not found */ |
1492 | return -1; |
1493 | } |
1494 | } |
1495 | tmp->next = to_remove->next; |
1496 | del_timer(&to_remove->timer); |
1497 | |
1498 | /* If this is the only MAC connected to this VCC, also tear down |
1499 | the VCC */ |
1500 | if (to_remove->status >= ESI_FLUSH_PENDING) { |
1501 | /* |
1502 | * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT |
1503 | */ |
1504 | for(place = 0; place < LEC_ARP_TABLE_SIZE; place++) { |
1505 | for(tmp = priv->lec_arp_tables[place]; tmp != NULL; tmp = tmp->next) { |
1506 | if (memcmp(tmp->atm_addr, to_remove->atm_addr, |
1507 | 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 | DPRINTK("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* |
1527 | get_status_string(unsigned char st) |
1528 | { |
1529 | switch(st) { |
1530 | case ESI_UNKNOWN: |
1531 | return "ESI_UNKNOWN"; |
1532 | case ESI_ARP_PENDING: |
1533 | return "ESI_ARP_PENDING"; |
1534 | case ESI_VC_PENDING: |
1535 | return "ESI_VC_PENDING"; |
1536 | case ESI_FLUSH_PENDING: |
1537 | return "ESI_FLUSH_PENDING"; |
1538 | case ESI_FORWARD_DIRECT: |
1539 | return "ESI_FORWARD_DIRECT"; |
1540 | default: |
1541 | return "<UNKNOWN>"; |
1542 | } |
1543 | } |
1544 | #endif |
1545 | |
1546 | static void |
1547 | dump_arp_table(struct lec_priv *priv) |
1548 | { |
1549 | #if DEBUG_ARP_TABLE |
1550 | int i,j, offset; |
1551 | struct lec_arp_table *rulla; |
1552 | char buf[1024]; |
1553 | struct lec_arp_table **lec_arp_tables = |
1554 | (struct lec_arp_table **)priv->lec_arp_tables; |
1555 | struct lec_arp_table *lec_arp_empty_ones = |
1556 | (struct lec_arp_table *)priv->lec_arp_empty_ones; |
1557 | struct lec_arp_table *lec_no_forward = |
1558 | (struct lec_arp_table *)priv->lec_no_forward; |
1559 | struct lec_arp_table *mcast_fwds = priv->mcast_fwds; |
1560 | |
1561 | |
1562 | printk("Dump %p:\n",priv); |
1563 | for (i=0;i<LEC_ARP_TABLE_SIZE;i++) { |
1564 | rulla = lec_arp_tables[i]; |
1565 | offset = 0; |
1566 | offset += sprintf(buf,"%d: %p\n",i, rulla); |
1567 | while (rulla) { |
1568 | offset += sprintf(buf+offset,"Mac:"); |
1569 | for(j=0;j<ETH_ALEN;j++) { |
1570 | offset+=sprintf(buf+offset, |
1571 | "%2.2x ", |
1572 | rulla->mac_addr[j]&0xff); |
1573 | } |
1574 | offset +=sprintf(buf+offset,"Atm:"); |
1575 | for(j=0;j<ATM_ESA_LEN;j++) { |
1576 | offset+=sprintf(buf+offset, |
1577 | "%2.2x ", |
1578 | rulla->atm_addr[j]&0xff); |
1579 | } |
1580 | offset+=sprintf(buf+offset, |
1581 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", |
1582 | rulla->vcc?rulla->vcc->vpi:0, |
1583 | rulla->vcc?rulla->vcc->vci:0, |
1584 | rulla->recv_vcc?rulla->recv_vcc->vpi:0, |
1585 | rulla->recv_vcc?rulla->recv_vcc->vci:0, |
1586 | rulla->last_used, |
1587 | rulla->timestamp, rulla->no_tries); |
1588 | offset+=sprintf(buf+offset, |
1589 | "Flags:%x, Packets_flooded:%x, Status: %s ", |
1590 | rulla->flags, rulla->packets_flooded, |
1591 | get_status_string(rulla->status)); |
1592 | offset+=sprintf(buf+offset,"->%p\n",rulla->next); |
1593 | rulla = rulla->next; |
1594 | } |
1595 | printk("%s",buf); |
1596 | } |
1597 | rulla = lec_no_forward; |
1598 | if (rulla) |
1599 | printk("No forward\n"); |
1600 | while(rulla) { |
1601 | offset=0; |
1602 | offset += sprintf(buf+offset,"Mac:"); |
1603 | for(j=0;j<ETH_ALEN;j++) { |
1604 | offset+=sprintf(buf+offset,"%2.2x ", |
1605 | rulla->mac_addr[j]&0xff); |
1606 | } |
1607 | offset +=sprintf(buf+offset,"Atm:"); |
1608 | for(j=0;j<ATM_ESA_LEN;j++) { |
1609 | offset+=sprintf(buf+offset,"%2.2x ", |
1610 | rulla->atm_addr[j]&0xff); |
1611 | } |
1612 | offset+=sprintf(buf+offset, |
1613 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", |
1614 | rulla->vcc?rulla->vcc->vpi:0, |
1615 | rulla->vcc?rulla->vcc->vci:0, |
1616 | rulla->recv_vcc?rulla->recv_vcc->vpi:0, |
1617 | rulla->recv_vcc?rulla->recv_vcc->vci:0, |
1618 | rulla->last_used, |
1619 | rulla->timestamp, rulla->no_tries); |
1620 | offset+=sprintf(buf+offset, |
1621 | "Flags:%x, Packets_flooded:%x, Status: %s ", |
1622 | rulla->flags, rulla->packets_flooded, |
1623 | get_status_string(rulla->status)); |
1624 | offset+=sprintf(buf+offset,"->%lx\n",(long)rulla->next); |
1625 | rulla = rulla->next; |
1626 | printk("%s",buf); |
1627 | } |
1628 | rulla = lec_arp_empty_ones; |
1629 | if (rulla) |
1630 | printk("Empty ones\n"); |
1631 | while(rulla) { |
1632 | offset=0; |
1633 | offset += sprintf(buf+offset,"Mac:"); |
1634 | for(j=0;j<ETH_ALEN;j++) { |
1635 | offset+=sprintf(buf+offset,"%2.2x ", |
1636 | rulla->mac_addr[j]&0xff); |
1637 | } |
1638 | offset +=sprintf(buf+offset,"Atm:"); |
1639 | for(j=0;j<ATM_ESA_LEN;j++) { |
1640 | offset+=sprintf(buf+offset,"%2.2x ", |
1641 | rulla->atm_addr[j]&0xff); |
1642 | } |
1643 | offset+=sprintf(buf+offset, |
1644 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", |
1645 | rulla->vcc?rulla->vcc->vpi:0, |
1646 | rulla->vcc?rulla->vcc->vci:0, |
1647 | rulla->recv_vcc?rulla->recv_vcc->vpi:0, |
1648 | rulla->recv_vcc?rulla->recv_vcc->vci:0, |
1649 | rulla->last_used, |
1650 | rulla->timestamp, rulla->no_tries); |
1651 | offset+=sprintf(buf+offset, |
1652 | "Flags:%x, Packets_flooded:%x, Status: %s ", |
1653 | rulla->flags, rulla->packets_flooded, |
1654 | get_status_string(rulla->status)); |
1655 | offset+=sprintf(buf+offset,"->%lx\n",(long)rulla->next); |
1656 | rulla = rulla->next; |
1657 | printk("%s",buf); |
1658 | } |
1659 | |
1660 | rulla = mcast_fwds; |
1661 | if (rulla) |
1662 | printk("Multicast Forward VCCs\n"); |
1663 | while(rulla) { |
1664 | offset=0; |
1665 | offset += sprintf(buf+offset,"Mac:"); |
1666 | for(j=0;j<ETH_ALEN;j++) { |
1667 | offset+=sprintf(buf+offset,"%2.2x ", |
1668 | rulla->mac_addr[j]&0xff); |
1669 | } |
1670 | offset +=sprintf(buf+offset,"Atm:"); |
1671 | for(j=0;j<ATM_ESA_LEN;j++) { |
1672 | offset+=sprintf(buf+offset,"%2.2x ", |
1673 | rulla->atm_addr[j]&0xff); |
1674 | } |
1675 | offset+=sprintf(buf+offset, |
1676 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", |
1677 | rulla->vcc?rulla->vcc->vpi:0, |
1678 | rulla->vcc?rulla->vcc->vci:0, |
1679 | rulla->recv_vcc?rulla->recv_vcc->vpi:0, |
1680 | rulla->recv_vcc?rulla->recv_vcc->vci:0, |
1681 | rulla->last_used, |
1682 | rulla->timestamp, rulla->no_tries); |
1683 | offset+=sprintf(buf+offset, |
1684 | "Flags:%x, Packets_flooded:%x, Status: %s ", |
1685 | rulla->flags, rulla->packets_flooded, |
1686 | get_status_string(rulla->status)); |
1687 | offset+=sprintf(buf+offset,"->%lx\n",(long)rulla->next); |
1688 | rulla = rulla->next; |
1689 | printk("%s",buf); |
1690 | } |
1691 | |
1692 | #endif |
1693 | } |
1694 | |
1695 | /* |
1696 | * Destruction of arp-cache |
1697 | */ |
1698 | static void |
1699 | lec_arp_destroy(struct lec_priv *priv) |
1700 | { |
1701 | unsigned long flags; |
1702 | struct lec_arp_table *entry, *next; |
1703 | int i; |
1704 | |
1705 | del_timer_sync(&priv->lec_arp_timer); |
1706 | |
1707 | /* |
1708 | * Remove all entries |
1709 | */ |
1710 | |
1711 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1712 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
1713 | for(entry = priv->lec_arp_tables[i]; entry != NULL; entry=next) { |
1714 | next = entry->next; |
1715 | lec_arp_remove(priv, entry); |
1716 | kfree(entry); |
1717 | } |
1718 | } |
1719 | entry = priv->lec_arp_empty_ones; |
1720 | while(entry) { |
1721 | next = entry->next; |
1722 | del_timer_sync(&entry->timer); |
1723 | lec_arp_clear_vccs(entry); |
1724 | kfree(entry); |
1725 | entry = next; |
1726 | } |
1727 | priv->lec_arp_empty_ones = NULL; |
1728 | entry = priv->lec_no_forward; |
1729 | while(entry) { |
1730 | next = entry->next; |
1731 | del_timer_sync(&entry->timer); |
1732 | lec_arp_clear_vccs(entry); |
1733 | kfree(entry); |
1734 | entry = next; |
1735 | } |
1736 | priv->lec_no_forward = NULL; |
1737 | entry = priv->mcast_fwds; |
1738 | while(entry) { |
1739 | next = entry->next; |
1740 | /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ |
1741 | lec_arp_clear_vccs(entry); |
1742 | kfree(entry); |
1743 | entry = next; |
1744 | } |
1745 | priv->mcast_fwds = NULL; |
1746 | priv->mcast_vcc = NULL; |
1747 | memset(priv->lec_arp_tables, 0, |
1748 | sizeof(struct lec_arp_table *) * LEC_ARP_TABLE_SIZE); |
1749 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1750 | } |
1751 | |
1752 | |
1753 | /* |
1754 | * Find entry by mac_address |
1755 | */ |
1756 | static struct lec_arp_table* |
1757 | lec_arp_find(struct lec_priv *priv, |
1758 | unsigned char *mac_addr) |
1759 | { |
1760 | unsigned short place; |
1761 | struct lec_arp_table *to_return; |
1762 | |
1763 | DPRINTK("LEC_ARP: lec_arp_find :%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n", |
1764 | mac_addr[0]&0xff, mac_addr[1]&0xff, mac_addr[2]&0xff, |
1765 | mac_addr[3]&0xff, mac_addr[4]&0xff, mac_addr[5]&0xff); |
1766 | place = HASH(mac_addr[ETH_ALEN-1]); |
1767 | |
1768 | to_return = priv->lec_arp_tables[place]; |
1769 | while(to_return) { |
1770 | if (memcmp(mac_addr, to_return->mac_addr, ETH_ALEN) == 0) { |
1771 | return to_return; |
1772 | } |
1773 | to_return = to_return->next; |
1774 | } |
1775 | return NULL; |
1776 | } |
1777 | |
1778 | static struct lec_arp_table* |
1779 | make_entry(struct lec_priv *priv, unsigned char *mac_addr) |
1780 | { |
1781 | struct lec_arp_table *to_return; |
1782 | |
1783 | to_return = (struct lec_arp_table *) kmalloc(sizeof(struct lec_arp_table), |
1784 | GFP_ATOMIC); |
1785 | if (!to_return) { |
1786 | printk("LEC: Arp entry kmalloc failed\n"); |
1787 | return NULL; |
1788 | } |
1789 | memset(to_return, 0, sizeof(struct lec_arp_table)); |
1790 | memcpy(to_return->mac_addr, mac_addr, ETH_ALEN); |
1791 | init_timer(&to_return->timer); |
1792 | to_return->timer.function = lec_arp_expire_arp; |
1793 | to_return->timer.data = (unsigned long) to_return; |
1794 | to_return->last_used = jiffies; |
1795 | to_return->priv = priv; |
1796 | skb_queue_head_init(&to_return->tx_wait); |
1797 | return to_return; |
1798 | } |
1799 | |
1800 | /* |
1801 | * |
1802 | * Arp sent timer expired |
1803 | * |
1804 | */ |
1805 | static void |
1806 | lec_arp_expire_arp(unsigned long data) |
1807 | { |
1808 | struct lec_arp_table *entry; |
1809 | |
1810 | entry = (struct lec_arp_table *)data; |
1811 | |
1812 | DPRINTK("lec_arp_expire_arp\n"); |
1813 | if (entry->status == ESI_ARP_PENDING) { |
1814 | if (entry->no_tries <= entry->priv->max_retry_count) { |
1815 | if (entry->is_rdesc) |
1816 | send_to_lecd(entry->priv, l_rdesc_arp_xmt, entry->mac_addr, NULL, NULL); |
1817 | else |
1818 | send_to_lecd(entry->priv, l_arp_xmt, entry->mac_addr, NULL, NULL); |
1819 | entry->no_tries++; |
1820 | } |
1821 | mod_timer(&entry->timer, jiffies + (1*HZ)); |
1822 | } |
1823 | } |
1824 | |
1825 | /* |
1826 | * |
1827 | * Unknown/unused vcc expire, remove associated entry |
1828 | * |
1829 | */ |
1830 | static void |
1831 | lec_arp_expire_vcc(unsigned long data) |
1832 | { |
1833 | unsigned long flags; |
1834 | struct lec_arp_table *to_remove = (struct lec_arp_table*)data; |
1835 | struct lec_priv *priv = (struct lec_priv *)to_remove->priv; |
1836 | struct lec_arp_table *entry = NULL; |
1837 | |
1838 | del_timer(&to_remove->timer); |
1839 | |
1840 | DPRINTK("LEC_ARP %p %p: lec_arp_expire_vcc vpi:%d vci:%d\n", |
1841 | to_remove, priv, |
1842 | to_remove->vcc?to_remove->recv_vcc->vpi:0, |
1843 | to_remove->vcc?to_remove->recv_vcc->vci:0); |
1844 | DPRINTK("eo:%p nf:%p\n",priv->lec_arp_empty_ones,priv->lec_no_forward); |
1845 | |
1846 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1847 | if (to_remove == priv->lec_arp_empty_ones) |
1848 | priv->lec_arp_empty_ones = to_remove->next; |
1849 | else { |
1850 | entry = priv->lec_arp_empty_ones; |
1851 | while (entry && entry->next != to_remove) |
1852 | entry = entry->next; |
1853 | if (entry) |
1854 | entry->next = to_remove->next; |
1855 | } |
1856 | if (!entry) { |
1857 | if (to_remove == priv->lec_no_forward) { |
1858 | priv->lec_no_forward = to_remove->next; |
1859 | } else { |
1860 | entry = priv->lec_no_forward; |
1861 | while (entry && entry->next != to_remove) |
1862 | entry = entry->next; |
1863 | if (entry) |
1864 | entry->next = to_remove->next; |
1865 | } |
1866 | } |
1867 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1868 | |
1869 | lec_arp_clear_vccs(to_remove); |
1870 | kfree(to_remove); |
1871 | } |
1872 | |
1873 | /* |
1874 | * Expire entries. |
1875 | * 1. Re-set timer |
1876 | * 2. For each entry, delete entries that have aged past the age limit. |
1877 | * 3. For each entry, depending on the status of the entry, perform |
1878 | * the following maintenance. |
1879 | * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the |
1880 | * tick_count is above the max_unknown_frame_time, clear |
1881 | * the tick_count to zero and clear the packets_flooded counter |
1882 | * to zero. This supports the packet rate limit per address |
1883 | * while flooding unknowns. |
1884 | * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater |
1885 | * than or equal to the path_switching_delay, change the status |
1886 | * to ESI_FORWARD_DIRECT. This causes the flush period to end |
1887 | * regardless of the progress of the flush protocol. |
1888 | */ |
1889 | static void |
1890 | lec_arp_check_expire(unsigned long data) |
1891 | { |
1892 | unsigned long flags; |
1893 | struct lec_priv *priv = (struct lec_priv *)data; |
1894 | struct lec_arp_table *entry, *next; |
1895 | unsigned long now; |
1896 | unsigned long time_to_check; |
1897 | int i; |
1898 | |
1899 | DPRINTK("lec_arp_check_expire %p\n",priv); |
1900 | DPRINTK("expire: eo:%p nf:%p\n",priv->lec_arp_empty_ones, |
1901 | priv->lec_no_forward); |
1902 | now = jiffies; |
1903 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1904 | for(i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
1905 | for(entry = priv->lec_arp_tables[i]; entry != NULL; ) { |
1906 | if ((entry->flags) & LEC_REMOTE_FLAG && |
1907 | priv->topology_change) |
1908 | time_to_check = priv->forward_delay_time; |
1909 | else |
1910 | time_to_check = priv->aging_time; |
1911 | |
1912 | DPRINTK("About to expire: %lx - %lx > %lx\n", |
1913 | now,entry->last_used, time_to_check); |
1914 | if( time_after(now, entry->last_used+ |
1915 | time_to_check) && |
1916 | !(entry->flags & LEC_PERMANENT_FLAG) && |
1917 | !(entry->mac_addr[0] & 0x01) ) { /* LANE2: 7.1.20 */ |
1918 | /* Remove entry */ |
1919 | DPRINTK("LEC:Entry timed out\n"); |
1920 | next = entry->next; |
1921 | lec_arp_remove(priv, entry); |
1922 | kfree(entry); |
1923 | entry = next; |
1924 | } else { |
1925 | /* Something else */ |
1926 | if ((entry->status == ESI_VC_PENDING || |
1927 | entry->status == ESI_ARP_PENDING) |
1928 | && time_after_eq(now, |
1929 | entry->timestamp + |
1930 | priv->max_unknown_frame_time)) { |
1931 | entry->timestamp = jiffies; |
1932 | entry->packets_flooded = 0; |
1933 | if (entry->status == ESI_VC_PENDING) |
1934 | send_to_lecd(priv, l_svc_setup, entry->mac_addr, entry->atm_addr, NULL); |
1935 | } |
1936 | if (entry->status == ESI_FLUSH_PENDING |
1937 | && |
1938 | time_after_eq(now, entry->timestamp+ |
1939 | priv->path_switching_delay)) { |
1940 | struct sk_buff *skb; |
1941 | |
1942 | while ((skb = skb_dequeue(&entry->tx_wait)) != NULL) |
1943 | lec_send(entry->vcc, skb, entry->priv); |
1944 | entry->last_used = jiffies; |
1945 | entry->status = |
1946 | ESI_FORWARD_DIRECT; |
1947 | } |
1948 | entry = entry->next; |
1949 | } |
1950 | } |
1951 | } |
1952 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
1953 | |
1954 | mod_timer(&priv->lec_arp_timer, jiffies + LEC_ARP_REFRESH_INTERVAL); |
1955 | } |
1956 | /* |
1957 | * Try to find vcc where mac_address is attached. |
1958 | * |
1959 | */ |
1960 | static struct atm_vcc* |
1961 | lec_arp_resolve(struct lec_priv *priv, unsigned char *mac_to_find, |
1962 | int is_rdesc, struct lec_arp_table **ret_entry) |
1963 | { |
1964 | unsigned long flags; |
1965 | struct lec_arp_table *entry; |
1966 | struct atm_vcc *found; |
1967 | |
1968 | if (mac_to_find[0] & 0x01) { |
1969 | switch (priv->lane_version) { |
1970 | case 1: |
1971 | return priv->mcast_vcc; |
1972 | break; |
1973 | case 2: /* LANE2 wants arp for multicast addresses */ |
1974 | if ( memcmp(mac_to_find, bus_mac, ETH_ALEN) == 0) |
1975 | return priv->mcast_vcc; |
1976 | break; |
1977 | default: |
1978 | break; |
1979 | } |
1980 | } |
1981 | |
1982 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
1983 | entry = lec_arp_find(priv, mac_to_find); |
1984 | |
1985 | if (entry) { |
1986 | if (entry->status == ESI_FORWARD_DIRECT) { |
1987 | /* Connection Ok */ |
1988 | entry->last_used = jiffies; |
1989 | *ret_entry = entry; |
1990 | found = entry->vcc; |
1991 | goto out; |
1992 | } |
1993 | /* Data direct VC not yet set up, check to see if the unknown |
1994 | frame count is greater than the limit. If the limit has |
1995 | not been reached, allow the caller to send packet to |
1996 | BUS. */ |
1997 | if (entry->status != ESI_FLUSH_PENDING && |
1998 | entry->packets_flooded<priv->maximum_unknown_frame_count) { |
1999 | entry->packets_flooded++; |
2000 | DPRINTK("LEC_ARP: Flooding..\n"); |
2001 | found = priv->mcast_vcc; |
2002 | goto out; |
2003 | } |
2004 | /* We got here because entry->status == ESI_FLUSH_PENDING |
2005 | * or BUS flood limit was reached for an entry which is |
2006 | * in ESI_ARP_PENDING or ESI_VC_PENDING state. |
2007 | */ |
2008 | *ret_entry = entry; |
2009 | DPRINTK("lec: entry->status %d entry->vcc %p\n", entry->status, entry->vcc); |
2010 | found = NULL; |
2011 | } else { |
2012 | /* No matching entry was found */ |
2013 | entry = make_entry(priv, mac_to_find); |
2014 | DPRINTK("LEC_ARP: Making entry\n"); |
2015 | if (!entry) { |
2016 | found = priv->mcast_vcc; |
2017 | goto out; |
2018 | } |
2019 | lec_arp_add(priv, entry); |
2020 | /* We want arp-request(s) to be sent */ |
2021 | entry->packets_flooded =1; |
2022 | entry->status = ESI_ARP_PENDING; |
2023 | entry->no_tries = 1; |
2024 | entry->last_used = entry->timestamp = jiffies; |
2025 | entry->is_rdesc = is_rdesc; |
2026 | if (entry->is_rdesc) |
2027 | send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL, NULL); |
2028 | else |
2029 | send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL); |
2030 | entry->timer.expires = jiffies + (1*HZ); |
2031 | entry->timer.function = lec_arp_expire_arp; |
2032 | add_timer(&entry->timer); |
2033 | found = priv->mcast_vcc; |
2034 | } |
2035 | |
2036 | out: |
2037 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
2038 | return found; |
2039 | } |
2040 | |
2041 | static int |
2042 | lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr, |
2043 | unsigned long permanent) |
2044 | { |
2045 | unsigned long flags; |
2046 | struct lec_arp_table *entry, *next; |
2047 | int i; |
2048 | |
2049 | DPRINTK("lec_addr_delete\n"); |
2050 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
2051 | for(i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
2052 | for(entry = priv->lec_arp_tables[i]; entry != NULL; entry = next) { |
2053 | next = entry->next; |
2054 | if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN) |
2055 | && (permanent || |
2056 | !(entry->flags & LEC_PERMANENT_FLAG))) { |
2057 | lec_arp_remove(priv, entry); |
2058 | kfree(entry); |
2059 | } |
2060 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
2061 | return 0; |
2062 | } |
2063 | } |
2064 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
2065 | return -1; |
2066 | } |
2067 | |
2068 | /* |
2069 | * Notifies: Response to arp_request (atm_addr != NULL) |
2070 | */ |
2071 | static void |
2072 | lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr, |
2073 | unsigned char *atm_addr, unsigned long remoteflag, |
2074 | unsigned int targetless_le_arp) |
2075 | { |
2076 | unsigned long flags; |
2077 | struct lec_arp_table *entry, *tmp; |
2078 | int i; |
2079 | |
2080 | DPRINTK("lec:%s", (targetless_le_arp) ? "targetless ": " "); |
2081 | DPRINTK("lec_arp_update mac:%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n", |
2082 | mac_addr[0],mac_addr[1],mac_addr[2],mac_addr[3], |
2083 | mac_addr[4],mac_addr[5]); |
2084 | |
2085 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
2086 | entry = lec_arp_find(priv, mac_addr); |
2087 | if (entry == NULL && targetless_le_arp) |
2088 | goto out; /* LANE2: ignore targetless LE_ARPs for which |
2089 | * we have no entry in the cache. 7.1.30 |
2090 | */ |
2091 | if (priv->lec_arp_empty_ones) { |
2092 | entry = priv->lec_arp_empty_ones; |
2093 | if (!memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN)) { |
2094 | priv->lec_arp_empty_ones = entry->next; |
2095 | } else { |
2096 | while(entry->next && memcmp(entry->next->atm_addr, |
2097 | atm_addr, ATM_ESA_LEN)) |
2098 | entry = entry->next; |
2099 | if (entry->next) { |
2100 | tmp = entry; |
2101 | entry = entry->next; |
2102 | tmp->next = entry->next; |
2103 | } else |
2104 | entry = NULL; |
2105 | |
2106 | } |
2107 | if (entry) { |
2108 | del_timer(&entry->timer); |
2109 | tmp = lec_arp_find(priv, mac_addr); |
2110 | if (tmp) { |
2111 | del_timer(&tmp->timer); |
2112 | tmp->status = ESI_FORWARD_DIRECT; |
2113 | memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN); |
2114 | tmp->vcc = entry->vcc; |
2115 | tmp->old_push = entry->old_push; |
2116 | tmp->last_used = jiffies; |
2117 | del_timer(&entry->timer); |
2118 | kfree(entry); |
2119 | entry=tmp; |
2120 | } else { |
2121 | entry->status = ESI_FORWARD_DIRECT; |
2122 | memcpy(entry->mac_addr, mac_addr, ETH_ALEN); |
2123 | entry->last_used = jiffies; |
2124 | lec_arp_add(priv, entry); |
2125 | } |
2126 | if (remoteflag) |
2127 | entry->flags|=LEC_REMOTE_FLAG; |
2128 | else |
2129 | entry->flags&=~LEC_REMOTE_FLAG; |
2130 | DPRINTK("After update\n"); |
2131 | dump_arp_table(priv); |
2132 | goto out; |
2133 | } |
2134 | } |
2135 | entry = lec_arp_find(priv, mac_addr); |
2136 | if (!entry) { |
2137 | entry = make_entry(priv, mac_addr); |
2138 | if (!entry) |
2139 | goto out; |
2140 | entry->status = ESI_UNKNOWN; |
2141 | lec_arp_add(priv, entry); |
2142 | /* Temporary, changes before end of function */ |
2143 | } |
2144 | memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN); |
2145 | del_timer(&entry->timer); |
2146 | for(i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
2147 | for(tmp = priv->lec_arp_tables[i]; tmp; tmp=tmp->next) { |
2148 | if (entry != tmp && |
2149 | !memcmp(tmp->atm_addr, atm_addr, |
2150 | ATM_ESA_LEN)) { |
2151 | /* Vcc to this host exists */ |
2152 | if (tmp->status > ESI_VC_PENDING) { |
2153 | /* |
2154 | * ESI_FLUSH_PENDING, |
2155 | * ESI_FORWARD_DIRECT |
2156 | */ |
2157 | entry->vcc = tmp->vcc; |
2158 | entry->old_push=tmp->old_push; |
2159 | } |
2160 | entry->status=tmp->status; |
2161 | break; |
2162 | } |
2163 | } |
2164 | } |
2165 | if (remoteflag) |
2166 | entry->flags|=LEC_REMOTE_FLAG; |
2167 | else |
2168 | entry->flags&=~LEC_REMOTE_FLAG; |
2169 | if (entry->status == ESI_ARP_PENDING || |
2170 | entry->status == ESI_UNKNOWN) { |
2171 | entry->status = ESI_VC_PENDING; |
2172 | send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL); |
2173 | } |
2174 | DPRINTK("After update2\n"); |
2175 | dump_arp_table(priv); |
2176 | out: |
2177 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
2178 | } |
2179 | |
2180 | /* |
2181 | * Notifies: Vcc setup ready |
2182 | */ |
2183 | static void |
2184 | lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data, |
2185 | struct atm_vcc *vcc, |
2186 | void (*old_push)(struct atm_vcc *vcc, struct sk_buff *skb)) |
2187 | { |
2188 | unsigned long flags; |
2189 | struct lec_arp_table *entry; |
2190 | int i, found_entry=0; |
2191 | |
2192 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
2193 | if (ioc_data->receive == 2) { |
2194 | /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */ |
2195 | |
2196 | DPRINTK("LEC_ARP: Attaching mcast forward\n"); |
2197 | #if 0 |
2198 | entry = lec_arp_find(priv, bus_mac); |
2199 | if (!entry) { |
2200 | printk("LEC_ARP: Multicast entry not found!\n"); |
2201 | goto out; |
2202 | } |
2203 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); |
2204 | entry->recv_vcc = vcc; |
2205 | entry->old_recv_push = old_push; |
2206 | #endif |
2207 | entry = make_entry(priv, bus_mac); |
2208 | if (entry == NULL) |
2209 | goto out; |
2210 | del_timer(&entry->timer); |
2211 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); |
2212 | entry->recv_vcc = vcc; |
2213 | entry->old_recv_push = old_push; |
2214 | entry->next = priv->mcast_fwds; |
2215 | priv->mcast_fwds = entry; |
2216 | goto out; |
2217 | } else if (ioc_data->receive == 1) { |
2218 | /* Vcc which we don't want to make default vcc, attach it |
2219 | anyway. */ |
2220 | DPRINTK("LEC_ARP:Attaching data direct, not default :%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n", |
2221 | ioc_data->atm_addr[0],ioc_data->atm_addr[1], |
2222 | ioc_data->atm_addr[2],ioc_data->atm_addr[3], |
2223 | ioc_data->atm_addr[4],ioc_data->atm_addr[5], |
2224 | ioc_data->atm_addr[6],ioc_data->atm_addr[7], |
2225 | ioc_data->atm_addr[8],ioc_data->atm_addr[9], |
2226 | ioc_data->atm_addr[10],ioc_data->atm_addr[11], |
2227 | ioc_data->atm_addr[12],ioc_data->atm_addr[13], |
2228 | ioc_data->atm_addr[14],ioc_data->atm_addr[15], |
2229 | ioc_data->atm_addr[16],ioc_data->atm_addr[17], |
2230 | ioc_data->atm_addr[18],ioc_data->atm_addr[19]); |
2231 | entry = make_entry(priv, bus_mac); |
2232 | if (entry == NULL) |
2233 | goto out; |
2234 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); |
2235 | memset(entry->mac_addr, 0, ETH_ALEN); |
2236 | entry->recv_vcc = vcc; |
2237 | entry->old_recv_push = old_push; |
2238 | entry->status = ESI_UNKNOWN; |
2239 | entry->timer.expires = jiffies + priv->vcc_timeout_period; |
2240 | entry->timer.function = lec_arp_expire_vcc; |
2241 | add_timer(&entry->timer); |
2242 | entry->next = priv->lec_no_forward; |
2243 | priv->lec_no_forward = entry; |
2244 | dump_arp_table(priv); |
2245 | goto out; |
2246 | } |
2247 | DPRINTK("LEC_ARP:Attaching data direct, default:%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n", |
2248 | ioc_data->atm_addr[0],ioc_data->atm_addr[1], |
2249 | ioc_data->atm_addr[2],ioc_data->atm_addr[3], |
2250 | ioc_data->atm_addr[4],ioc_data->atm_addr[5], |
2251 | ioc_data->atm_addr[6],ioc_data->atm_addr[7], |
2252 | ioc_data->atm_addr[8],ioc_data->atm_addr[9], |
2253 | ioc_data->atm_addr[10],ioc_data->atm_addr[11], |
2254 | ioc_data->atm_addr[12],ioc_data->atm_addr[13], |
2255 | ioc_data->atm_addr[14],ioc_data->atm_addr[15], |
2256 | ioc_data->atm_addr[16],ioc_data->atm_addr[17], |
2257 | ioc_data->atm_addr[18],ioc_data->atm_addr[19]); |
2258 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
2259 | for (entry = priv->lec_arp_tables[i]; entry; entry=entry->next) { |
2260 | if (memcmp(ioc_data->atm_addr, entry->atm_addr, |
2261 | ATM_ESA_LEN)==0) { |
2262 | DPRINTK("LEC_ARP: Attaching data direct\n"); |
2263 | DPRINTK("Currently -> Vcc: %d, Rvcc:%d\n", |
2264 | entry->vcc?entry->vcc->vci:0, |
2265 | entry->recv_vcc?entry->recv_vcc->vci:0); |
2266 | found_entry=1; |
2267 | del_timer(&entry->timer); |
2268 | entry->vcc = vcc; |
2269 | entry->old_push = old_push; |
2270 | if (entry->status == ESI_VC_PENDING) { |
2271 | if(priv->maximum_unknown_frame_count |
2272 | ==0) |
2273 | entry->status = |
2274 | ESI_FORWARD_DIRECT; |
2275 | else { |
2276 | entry->timestamp = jiffies; |
2277 | entry->status = |
2278 | ESI_FLUSH_PENDING; |
2279 | #if 0 |
2280 | send_to_lecd(priv,l_flush_xmt, |
2281 | NULL, |
2282 | entry->atm_addr, |
2283 | NULL); |
2284 | #endif |
2285 | } |
2286 | } else { |
2287 | /* They were forming a connection |
2288 | to us, and we to them. Our |
2289 | ATM address is numerically lower |
2290 | than theirs, so we make connection |
2291 | we formed into default VCC (8.1.11). |
2292 | Connection they made gets torn |
2293 | down. This might confuse some |
2294 | clients. Can be changed if |
2295 | someone reports trouble... */ |
2296 | ; |
2297 | } |
2298 | } |
2299 | } |
2300 | } |
2301 | if (found_entry) { |
2302 | DPRINTK("After vcc was added\n"); |
2303 | dump_arp_table(priv); |
2304 | goto out; |
2305 | } |
2306 | /* Not found, snatch address from first data packet that arrives from |
2307 | this vcc */ |
2308 | entry = make_entry(priv, bus_mac); |
2309 | if (!entry) |
2310 | goto out; |
2311 | entry->vcc = vcc; |
2312 | entry->old_push = old_push; |
2313 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); |
2314 | memset(entry->mac_addr, 0, ETH_ALEN); |
2315 | entry->status = ESI_UNKNOWN; |
2316 | entry->next = priv->lec_arp_empty_ones; |
2317 | priv->lec_arp_empty_ones = entry; |
2318 | entry->timer.expires = jiffies + priv->vcc_timeout_period; |
2319 | entry->timer.function = lec_arp_expire_vcc; |
2320 | add_timer(&entry->timer); |
2321 | DPRINTK("After vcc was added\n"); |
2322 | dump_arp_table(priv); |
2323 | out: |
2324 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
2325 | } |
2326 | |
2327 | static void |
2328 | lec_flush_complete(struct lec_priv *priv, unsigned long tran_id) |
2329 | { |
2330 | unsigned long flags; |
2331 | struct lec_arp_table *entry; |
2332 | int i; |
2333 | |
2334 | DPRINTK("LEC:lec_flush_complete %lx\n",tran_id); |
2335 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
2336 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
2337 | for (entry = priv->lec_arp_tables[i]; entry; entry=entry->next) { |
2338 | if (entry->flush_tran_id == tran_id && |
2339 | entry->status == ESI_FLUSH_PENDING) { |
2340 | struct sk_buff *skb; |
2341 | |
2342 | while ((skb = skb_dequeue(&entry->tx_wait)) != NULL) |
2343 | lec_send(entry->vcc, skb, entry->priv); |
2344 | entry->status = ESI_FORWARD_DIRECT; |
2345 | DPRINTK("LEC_ARP: Flushed\n"); |
2346 | } |
2347 | } |
2348 | } |
2349 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
2350 | dump_arp_table(priv); |
2351 | } |
2352 | |
2353 | static void |
2354 | lec_set_flush_tran_id(struct lec_priv *priv, |
2355 | unsigned char *atm_addr, unsigned long tran_id) |
2356 | { |
2357 | unsigned long flags; |
2358 | struct lec_arp_table *entry; |
2359 | int i; |
2360 | |
2361 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
2362 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) |
2363 | for(entry = priv->lec_arp_tables[i]; entry; entry=entry->next) |
2364 | if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) { |
2365 | entry->flush_tran_id = tran_id; |
2366 | DPRINTK("Set flush transaction id to %lx for %p\n",tran_id,entry); |
2367 | } |
2368 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
2369 | } |
2370 | |
2371 | static int |
2372 | lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc) |
2373 | { |
2374 | unsigned long flags; |
2375 | unsigned char mac_addr[] = { |
2376 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; |
2377 | struct lec_arp_table *to_add; |
2378 | struct lec_vcc_priv *vpriv; |
2379 | int err = 0; |
2380 | |
2381 | if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL))) |
2382 | return -ENOMEM; |
2383 | vpriv->xoff = 0; |
2384 | vpriv->old_pop = vcc->pop; |
2385 | vcc->user_back = vpriv; |
2386 | vcc->pop = lec_pop; |
2387 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
2388 | to_add = make_entry(priv, mac_addr); |
2389 | if (!to_add) { |
2390 | vcc->pop = vpriv->old_pop; |
2391 | kfree(vpriv); |
2392 | err = -ENOMEM; |
2393 | goto out; |
2394 | } |
2395 | memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN); |
2396 | to_add->status = ESI_FORWARD_DIRECT; |
2397 | to_add->flags |= LEC_PERMANENT_FLAG; |
2398 | to_add->vcc = vcc; |
2399 | to_add->old_push = vcc->push; |
2400 | vcc->push = lec_push; |
2401 | priv->mcast_vcc = vcc; |
2402 | lec_arp_add(priv, to_add); |
2403 | out: |
2404 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
2405 | return err; |
2406 | } |
2407 | |
2408 | static void |
2409 | lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc) |
2410 | { |
2411 | unsigned long flags; |
2412 | struct lec_arp_table *entry, *next; |
2413 | int i; |
2414 | |
2415 | DPRINTK("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n",vcc->vpi,vcc->vci); |
2416 | dump_arp_table(priv); |
2417 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
2418 | for(i=0;i<LEC_ARP_TABLE_SIZE;i++) { |
2419 | for(entry = priv->lec_arp_tables[i];entry; entry=next) { |
2420 | next = entry->next; |
2421 | if (vcc == entry->vcc) { |
2422 | lec_arp_remove(priv, entry); |
2423 | kfree(entry); |
2424 | if (priv->mcast_vcc == vcc) { |
2425 | priv->mcast_vcc = NULL; |
2426 | } |
2427 | } |
2428 | } |
2429 | } |
2430 | |
2431 | entry = priv->lec_arp_empty_ones; |
2432 | priv->lec_arp_empty_ones = NULL; |
2433 | while (entry != NULL) { |
2434 | next = entry->next; |
2435 | if (entry->vcc == vcc) { /* leave it out from the list */ |
2436 | lec_arp_clear_vccs(entry); |
2437 | del_timer(&entry->timer); |
2438 | kfree(entry); |
2439 | } |
2440 | else { /* put it back to the list */ |
2441 | entry->next = priv->lec_arp_empty_ones; |
2442 | priv->lec_arp_empty_ones = entry; |
2443 | } |
2444 | entry = next; |
2445 | } |
2446 | |
2447 | entry = priv->lec_no_forward; |
2448 | priv->lec_no_forward = NULL; |
2449 | while (entry != NULL) { |
2450 | next = entry->next; |
2451 | if (entry->recv_vcc == vcc) { |
2452 | lec_arp_clear_vccs(entry); |
2453 | del_timer(&entry->timer); |
2454 | kfree(entry); |
2455 | } |
2456 | else { |
2457 | entry->next = priv->lec_no_forward; |
2458 | priv->lec_no_forward = entry; |
2459 | } |
2460 | entry = next; |
2461 | } |
2462 | |
2463 | entry = priv->mcast_fwds; |
2464 | priv->mcast_fwds = NULL; |
2465 | while (entry != NULL) { |
2466 | next = entry->next; |
2467 | if (entry->recv_vcc == vcc) { |
2468 | lec_arp_clear_vccs(entry); |
2469 | /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ |
2470 | kfree(entry); |
2471 | } |
2472 | else { |
2473 | entry->next = priv->mcast_fwds; |
2474 | priv->mcast_fwds = entry; |
2475 | } |
2476 | entry = next; |
2477 | } |
2478 | |
2479 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
2480 | dump_arp_table(priv); |
2481 | } |
2482 | |
2483 | static void |
2484 | lec_arp_check_empties(struct lec_priv *priv, |
2485 | struct atm_vcc *vcc, struct sk_buff *skb) |
2486 | { |
2487 | unsigned long flags; |
2488 | struct lec_arp_table *entry, *prev; |
2489 | struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data; |
2490 | unsigned char *src; |
2491 | #ifdef CONFIG_TR |
2492 | struct lecdatahdr_8025 *tr_hdr = (struct lecdatahdr_8025 *)skb->data; |
2493 | |
2494 | if (priv->is_trdev) src = tr_hdr->h_source; |
2495 | else |
2496 | #endif |
2497 | src = hdr->h_source; |
2498 | |
2499 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
2500 | entry = priv->lec_arp_empty_ones; |
2501 | if (vcc == entry->vcc) { |
2502 | del_timer(&entry->timer); |
2503 | memcpy(entry->mac_addr, src, ETH_ALEN); |
2504 | entry->status = ESI_FORWARD_DIRECT; |
2505 | entry->last_used = jiffies; |
2506 | priv->lec_arp_empty_ones = entry->next; |
2507 | /* We might have got an entry */ |
2508 | if ((prev = lec_arp_find(priv,src))) { |
2509 | lec_arp_remove(priv, prev); |
2510 | kfree(prev); |
2511 | } |
2512 | lec_arp_add(priv, entry); |
2513 | goto out; |
2514 | } |
2515 | prev = entry; |
2516 | entry = entry->next; |
2517 | while (entry && entry->vcc != vcc) { |
2518 | prev= entry; |
2519 | entry = entry->next; |
2520 | } |
2521 | if (!entry) { |
2522 | DPRINTK("LEC_ARP: Arp_check_empties: entry not found!\n"); |
2523 | goto out; |
2524 | } |
2525 | del_timer(&entry->timer); |
2526 | memcpy(entry->mac_addr, src, ETH_ALEN); |
2527 | entry->status = ESI_FORWARD_DIRECT; |
2528 | entry->last_used = jiffies; |
2529 | prev->next = entry->next; |
2530 | if ((prev = lec_arp_find(priv, src))) { |
2531 | lec_arp_remove(priv, prev); |
2532 | kfree(prev); |
2533 | } |
2534 | lec_arp_add(priv, entry); |
2535 | out: |
2536 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
2537 | } |
2538 | MODULE_LICENSE("GPL"); |