]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * lec.c: Lan Emulation driver | |
3 | * Marko Kiiskila mkiiskila@yahoo.com | |
4 | * | |
5 | */ | |
6 | ||
1da177e4 LT |
7 | #include <linux/kernel.h> |
8 | #include <linux/bitops.h> | |
4fc268d2 | 9 | #include <linux/capability.h> |
1da177e4 LT |
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 | ||
4a7097fc ST |
689 | #define LEC_DATA_DIRECT_8023 2 |
690 | #define LEC_DATA_DIRECT_8025 3 | |
691 | ||
692 | static int lec_is_data_direct(struct atm_vcc *vcc) | |
693 | { | |
694 | return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) || | |
695 | (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025)); | |
696 | } | |
697 | ||
1da177e4 LT |
698 | static void |
699 | lec_push(struct atm_vcc *vcc, struct sk_buff *skb) | |
700 | { | |
4a7097fc | 701 | unsigned long flags; |
1da177e4 LT |
702 | struct net_device *dev = (struct net_device *)vcc->proto_data; |
703 | struct lec_priv *priv = (struct lec_priv *)dev->priv; | |
704 | ||
705 | #if DUMP_PACKETS >0 | |
706 | int i=0; | |
707 | char buf[300]; | |
708 | ||
709 | printk("%s: lec_push vcc vpi:%d vci:%d\n", dev->name, | |
710 | vcc->vpi, vcc->vci); | |
711 | #endif | |
712 | if (!skb) { | |
713 | DPRINTK("%s: null skb\n",dev->name); | |
714 | lec_vcc_close(priv, vcc); | |
715 | return; | |
716 | } | |
717 | #if DUMP_PACKETS > 0 | |
718 | printk("%s: rcv datalen:%ld lecid:%4.4x\n", dev->name, | |
719 | skb->len, priv->lecid); | |
720 | #if DUMP_PACKETS >= 2 | |
721 | for(i=0;i<skb->len && i <99;i++) { | |
722 | sprintf(buf+i*3,"%2.2x ",0xff&skb->data[i]); | |
723 | } | |
724 | #elif DUMP_PACKETS >= 1 | |
725 | for(i=0;i<skb->len && i < 30;i++) { | |
726 | sprintf(buf+i*3,"%2.2x ", 0xff&skb->data[i]); | |
727 | } | |
728 | #endif /* DUMP_PACKETS >= 1 */ | |
729 | if (i==skb->len) | |
730 | printk("%s\n",buf); | |
731 | else | |
732 | printk("%s...\n",buf); | |
733 | #endif /* DUMP_PACKETS > 0 */ | |
734 | if (memcmp(skb->data, lec_ctrl_magic, 4) ==0) { /* Control frame, to daemon*/ | |
735 | struct sock *sk = sk_atm(vcc); | |
736 | ||
737 | DPRINTK("%s: To daemon\n",dev->name); | |
738 | skb_queue_tail(&sk->sk_receive_queue, skb); | |
739 | sk->sk_data_ready(sk, skb->len); | |
740 | } else { /* Data frame, queue to protocol handlers */ | |
4a7097fc ST |
741 | struct lec_arp_table *entry; |
742 | unsigned char *src, *dst; | |
1da177e4 LT |
743 | |
744 | atm_return(vcc,skb->truesize); | |
745 | if (*(uint16_t *)skb->data == htons(priv->lecid) || | |
746 | !priv->lecd || | |
747 | !(dev->flags & IFF_UP)) { | |
748 | /* Probably looping back, or if lecd is missing, | |
749 | lecd has gone down */ | |
750 | DPRINTK("Ignoring frame...\n"); | |
751 | dev_kfree_skb(skb); | |
752 | return; | |
753 | } | |
754 | #ifdef CONFIG_TR | |
4a7097fc ST |
755 | if (priv->is_trdev) |
756 | dst = ((struct lecdatahdr_8025 *) skb->data)->h_dest; | |
1da177e4 LT |
757 | else |
758 | #endif | |
4a7097fc ST |
759 | dst = ((struct lecdatahdr_8023 *) skb->data)->h_dest; |
760 | ||
761 | /* If this is a Data Direct VCC, and the VCC does not match | |
762 | * the LE_ARP cache entry, delete the LE_ARP cache entry. | |
763 | */ | |
764 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
765 | if (lec_is_data_direct(vcc)) { | |
766 | #ifdef CONFIG_TR | |
767 | if (priv->is_trdev) | |
768 | src = ((struct lecdatahdr_8025 *) skb->data)->h_source; | |
769 | else | |
770 | #endif | |
771 | src = ((struct lecdatahdr_8023 *) skb->data)->h_source; | |
772 | entry = lec_arp_find(priv, src); | |
773 | if (entry && entry->vcc != vcc) { | |
774 | lec_arp_remove(priv, entry); | |
775 | kfree(entry); | |
776 | } | |
777 | } | |
778 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
1da177e4 LT |
779 | |
780 | if (!(dst[0]&0x01) && /* Never filter Multi/Broadcast */ | |
781 | !priv->is_proxy && /* Proxy wants all the packets */ | |
782 | memcmp(dst, dev->dev_addr, dev->addr_len)) { | |
783 | dev_kfree_skb(skb); | |
784 | return; | |
785 | } | |
786 | if (priv->lec_arp_empty_ones) { | |
787 | lec_arp_check_empties(priv, vcc, skb); | |
788 | } | |
789 | skb->dev = dev; | |
790 | skb_pull(skb, 2); /* skip lec_id */ | |
791 | #ifdef CONFIG_TR | |
792 | if (priv->is_trdev) skb->protocol = tr_type_trans(skb, dev); | |
793 | else | |
794 | #endif | |
795 | skb->protocol = eth_type_trans(skb, dev); | |
796 | priv->stats.rx_packets++; | |
797 | priv->stats.rx_bytes += skb->len; | |
798 | memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); | |
799 | netif_rx(skb); | |
800 | } | |
801 | } | |
802 | ||
803 | static void | |
804 | lec_pop(struct atm_vcc *vcc, struct sk_buff *skb) | |
805 | { | |
806 | struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); | |
807 | struct net_device *dev = skb->dev; | |
808 | ||
809 | if (vpriv == NULL) { | |
810 | printk("lec_pop(): vpriv = NULL!?!?!?\n"); | |
811 | return; | |
812 | } | |
813 | ||
814 | vpriv->old_pop(vcc, skb); | |
815 | ||
816 | if (vpriv->xoff && atm_may_send(vcc, 0)) { | |
817 | vpriv->xoff = 0; | |
818 | if (netif_running(dev) && netif_queue_stopped(dev)) | |
819 | netif_wake_queue(dev); | |
820 | } | |
821 | } | |
822 | ||
823 | static int | |
824 | lec_vcc_attach(struct atm_vcc *vcc, void __user *arg) | |
825 | { | |
826 | struct lec_vcc_priv *vpriv; | |
827 | int bytes_left; | |
828 | struct atmlec_ioc ioc_data; | |
829 | ||
830 | /* Lecd must be up in this case */ | |
831 | bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc)); | |
832 | if (bytes_left != 0) { | |
833 | printk("lec: lec_vcc_attach, copy from user failed for %d bytes\n", | |
834 | bytes_left); | |
835 | } | |
836 | if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF || | |
837 | !dev_lec[ioc_data.dev_num]) | |
838 | return -EINVAL; | |
839 | if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL))) | |
840 | return -ENOMEM; | |
841 | vpriv->xoff = 0; | |
842 | vpriv->old_pop = vcc->pop; | |
843 | vcc->user_back = vpriv; | |
844 | vcc->pop = lec_pop; | |
845 | lec_vcc_added(dev_lec[ioc_data.dev_num]->priv, | |
846 | &ioc_data, vcc, vcc->push); | |
847 | vcc->proto_data = dev_lec[ioc_data.dev_num]; | |
848 | vcc->push = lec_push; | |
849 | return 0; | |
850 | } | |
851 | ||
852 | static int | |
853 | lec_mcast_attach(struct atm_vcc *vcc, int arg) | |
854 | { | |
855 | if (arg <0 || arg >= MAX_LEC_ITF || !dev_lec[arg]) | |
856 | return -EINVAL; | |
857 | vcc->proto_data = dev_lec[arg]; | |
858 | return (lec_mcast_make((struct lec_priv*)dev_lec[arg]->priv, vcc)); | |
859 | } | |
860 | ||
861 | /* Initialize device. */ | |
862 | static int | |
863 | lecd_attach(struct atm_vcc *vcc, int arg) | |
864 | { | |
865 | int i; | |
866 | struct lec_priv *priv; | |
867 | ||
868 | if (arg<0) | |
869 | i = 0; | |
870 | else | |
871 | i = arg; | |
872 | #ifdef CONFIG_TR | |
873 | if (arg >= MAX_LEC_ITF) | |
874 | return -EINVAL; | |
875 | #else /* Reserve the top NUM_TR_DEVS for TR */ | |
876 | if (arg >= (MAX_LEC_ITF-NUM_TR_DEVS)) | |
877 | return -EINVAL; | |
878 | #endif | |
879 | if (!dev_lec[i]) { | |
880 | int is_trdev, size; | |
881 | ||
882 | is_trdev = 0; | |
883 | if (i >= (MAX_LEC_ITF - NUM_TR_DEVS)) | |
884 | is_trdev = 1; | |
885 | ||
886 | size = sizeof(struct lec_priv); | |
887 | #ifdef CONFIG_TR | |
888 | if (is_trdev) | |
889 | dev_lec[i] = alloc_trdev(size); | |
890 | else | |
891 | #endif | |
892 | dev_lec[i] = alloc_etherdev(size); | |
893 | if (!dev_lec[i]) | |
894 | return -ENOMEM; | |
895 | snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i); | |
896 | if (register_netdev(dev_lec[i])) { | |
897 | free_netdev(dev_lec[i]); | |
898 | return -EINVAL; | |
899 | } | |
900 | ||
901 | priv = dev_lec[i]->priv; | |
902 | priv->is_trdev = is_trdev; | |
903 | lec_init(dev_lec[i]); | |
904 | } else { | |
905 | priv = dev_lec[i]->priv; | |
906 | if (priv->lecd) | |
907 | return -EADDRINUSE; | |
908 | } | |
909 | lec_arp_init(priv); | |
910 | priv->itfnum = i; /* LANE2 addition */ | |
911 | priv->lecd = vcc; | |
912 | vcc->dev = &lecatm_dev; | |
913 | vcc_insert_socket(sk_atm(vcc)); | |
914 | ||
915 | vcc->proto_data = dev_lec[i]; | |
916 | set_bit(ATM_VF_META,&vcc->flags); | |
917 | set_bit(ATM_VF_READY,&vcc->flags); | |
918 | ||
919 | /* Set default values to these variables */ | |
920 | priv->maximum_unknown_frame_count = 1; | |
921 | priv->max_unknown_frame_time = (1*HZ); | |
922 | priv->vcc_timeout_period = (1200*HZ); | |
923 | priv->max_retry_count = 1; | |
924 | priv->aging_time = (300*HZ); | |
925 | priv->forward_delay_time = (15*HZ); | |
926 | priv->topology_change = 0; | |
927 | priv->arp_response_time = (1*HZ); | |
928 | priv->flush_timeout = (4*HZ); | |
929 | priv->path_switching_delay = (6*HZ); | |
930 | ||
931 | if (dev_lec[i]->flags & IFF_UP) { | |
932 | netif_start_queue(dev_lec[i]); | |
933 | } | |
934 | __module_get(THIS_MODULE); | |
935 | return i; | |
936 | } | |
937 | ||
938 | #ifdef CONFIG_PROC_FS | |
939 | static char* lec_arp_get_status_string(unsigned char status) | |
940 | { | |
941 | static char *lec_arp_status_string[] = { | |
942 | "ESI_UNKNOWN ", | |
943 | "ESI_ARP_PENDING ", | |
944 | "ESI_VC_PENDING ", | |
945 | "<Undefined> ", | |
946 | "ESI_FLUSH_PENDING ", | |
947 | "ESI_FORWARD_DIRECT" | |
948 | }; | |
949 | ||
950 | if (status > ESI_FORWARD_DIRECT) | |
951 | status = 3; /* ESI_UNDEFINED */ | |
952 | return lec_arp_status_string[status]; | |
953 | } | |
954 | ||
955 | static void lec_info(struct seq_file *seq, struct lec_arp_table *entry) | |
956 | { | |
957 | int i; | |
958 | ||
959 | for (i = 0; i < ETH_ALEN; i++) | |
960 | seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff); | |
961 | seq_printf(seq, " "); | |
962 | for (i = 0; i < ATM_ESA_LEN; i++) | |
963 | seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff); | |
964 | seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status), | |
965 | entry->flags & 0xffff); | |
966 | if (entry->vcc) | |
967 | seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci); | |
968 | else | |
969 | seq_printf(seq, " "); | |
970 | if (entry->recv_vcc) { | |
971 | seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi, | |
972 | entry->recv_vcc->vci); | |
973 | } | |
974 | seq_putc(seq, '\n'); | |
975 | } | |
976 | ||
977 | ||
978 | struct lec_state { | |
979 | unsigned long flags; | |
980 | struct lec_priv *locked; | |
981 | struct lec_arp_table *entry; | |
982 | struct net_device *dev; | |
983 | int itf; | |
984 | int arp_table; | |
985 | int misc_table; | |
986 | }; | |
987 | ||
988 | static void *lec_tbl_walk(struct lec_state *state, struct lec_arp_table *tbl, | |
989 | loff_t *l) | |
990 | { | |
991 | struct lec_arp_table *e = state->entry; | |
992 | ||
993 | if (!e) | |
994 | e = tbl; | |
995 | if (e == (void *)1) { | |
996 | e = tbl; | |
997 | --*l; | |
998 | } | |
999 | for (; e; e = e->next) { | |
1000 | if (--*l < 0) | |
1001 | break; | |
1002 | } | |
1003 | state->entry = e; | |
1004 | return (*l < 0) ? state : NULL; | |
1005 | } | |
1006 | ||
1007 | static void *lec_arp_walk(struct lec_state *state, loff_t *l, | |
1008 | struct lec_priv *priv) | |
1009 | { | |
1010 | void *v = NULL; | |
1011 | int p; | |
1012 | ||
1013 | for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) { | |
1014 | v = lec_tbl_walk(state, priv->lec_arp_tables[p], l); | |
1015 | if (v) | |
1016 | break; | |
1017 | } | |
1018 | state->arp_table = p; | |
1019 | return v; | |
1020 | } | |
1021 | ||
1022 | static void *lec_misc_walk(struct lec_state *state, loff_t *l, | |
1023 | struct lec_priv *priv) | |
1024 | { | |
1025 | struct lec_arp_table *lec_misc_tables[] = { | |
1026 | priv->lec_arp_empty_ones, | |
1027 | priv->lec_no_forward, | |
1028 | priv->mcast_fwds | |
1029 | }; | |
1030 | void *v = NULL; | |
1031 | int q; | |
1032 | ||
1033 | for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) { | |
1034 | v = lec_tbl_walk(state, lec_misc_tables[q], l); | |
1035 | if (v) | |
1036 | break; | |
1037 | } | |
1038 | state->misc_table = q; | |
1039 | return v; | |
1040 | } | |
1041 | ||
1042 | static void *lec_priv_walk(struct lec_state *state, loff_t *l, | |
1043 | struct lec_priv *priv) | |
1044 | { | |
1045 | if (!state->locked) { | |
1046 | state->locked = priv; | |
1047 | spin_lock_irqsave(&priv->lec_arp_lock, state->flags); | |
1048 | } | |
1049 | if (!lec_arp_walk(state, l, priv) && | |
1050 | !lec_misc_walk(state, l, priv)) { | |
1051 | spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags); | |
1052 | state->locked = NULL; | |
1053 | /* Partial state reset for the next time we get called */ | |
1054 | state->arp_table = state->misc_table = 0; | |
1055 | } | |
1056 | return state->locked; | |
1057 | } | |
1058 | ||
1059 | static void *lec_itf_walk(struct lec_state *state, loff_t *l) | |
1060 | { | |
1061 | struct net_device *dev; | |
1062 | void *v; | |
1063 | ||
1064 | dev = state->dev ? state->dev : dev_lec[state->itf]; | |
1065 | v = (dev && dev->priv) ? lec_priv_walk(state, l, dev->priv) : NULL; | |
1066 | if (!v && dev) { | |
1067 | dev_put(dev); | |
1068 | /* Partial state reset for the next time we get called */ | |
1069 | dev = NULL; | |
1070 | } | |
1071 | state->dev = dev; | |
1072 | return v; | |
1073 | } | |
1074 | ||
1075 | static void *lec_get_idx(struct lec_state *state, loff_t l) | |
1076 | { | |
1077 | void *v = NULL; | |
1078 | ||
1079 | for (; state->itf < MAX_LEC_ITF; state->itf++) { | |
1080 | v = lec_itf_walk(state, &l); | |
1081 | if (v) | |
1082 | break; | |
1083 | } | |
1084 | return v; | |
1085 | } | |
1086 | ||
1087 | static void *lec_seq_start(struct seq_file *seq, loff_t *pos) | |
1088 | { | |
1089 | struct lec_state *state = seq->private; | |
1090 | ||
1091 | state->itf = 0; | |
1092 | state->dev = NULL; | |
1093 | state->locked = NULL; | |
1094 | state->arp_table = 0; | |
1095 | state->misc_table = 0; | |
1096 | state->entry = (void *)1; | |
1097 | ||
1098 | return *pos ? lec_get_idx(state, *pos) : (void*)1; | |
1099 | } | |
1100 | ||
1101 | static void lec_seq_stop(struct seq_file *seq, void *v) | |
1102 | { | |
1103 | struct lec_state *state = seq->private; | |
1104 | ||
1105 | if (state->dev) { | |
1106 | spin_unlock_irqrestore(&state->locked->lec_arp_lock, | |
1107 | state->flags); | |
1108 | dev_put(state->dev); | |
1109 | } | |
1110 | } | |
1111 | ||
1112 | static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1113 | { | |
1114 | struct lec_state *state = seq->private; | |
1115 | ||
1116 | v = lec_get_idx(state, 1); | |
1117 | *pos += !!PTR_ERR(v); | |
1118 | return v; | |
1119 | } | |
1120 | ||
1121 | static int lec_seq_show(struct seq_file *seq, void *v) | |
1122 | { | |
1123 | static char lec_banner[] = "Itf MAC ATM destination" | |
1124 | " Status Flags " | |
1125 | "VPI/VCI Recv VPI/VCI\n"; | |
1126 | ||
1127 | if (v == (void *)1) | |
1128 | seq_puts(seq, lec_banner); | |
1129 | else { | |
1130 | struct lec_state *state = seq->private; | |
1131 | struct net_device *dev = state->dev; | |
1132 | ||
1133 | seq_printf(seq, "%s ", dev->name); | |
1134 | lec_info(seq, state->entry); | |
1135 | } | |
1136 | return 0; | |
1137 | } | |
1138 | ||
1139 | static struct seq_operations lec_seq_ops = { | |
1140 | .start = lec_seq_start, | |
1141 | .next = lec_seq_next, | |
1142 | .stop = lec_seq_stop, | |
1143 | .show = lec_seq_show, | |
1144 | }; | |
1145 | ||
1146 | static int lec_seq_open(struct inode *inode, struct file *file) | |
1147 | { | |
1148 | struct lec_state *state; | |
1149 | struct seq_file *seq; | |
1150 | int rc = -EAGAIN; | |
1151 | ||
1152 | state = kmalloc(sizeof(*state), GFP_KERNEL); | |
1153 | if (!state) { | |
1154 | rc = -ENOMEM; | |
1155 | goto out; | |
1156 | } | |
1157 | ||
1158 | rc = seq_open(file, &lec_seq_ops); | |
1159 | if (rc) | |
1160 | goto out_kfree; | |
1161 | seq = file->private_data; | |
1162 | seq->private = state; | |
1163 | out: | |
1164 | return rc; | |
1165 | ||
1166 | out_kfree: | |
1167 | kfree(state); | |
1168 | goto out; | |
1169 | } | |
1170 | ||
1171 | static int lec_seq_release(struct inode *inode, struct file *file) | |
1172 | { | |
1173 | return seq_release_private(inode, file); | |
1174 | } | |
1175 | ||
1176 | static struct file_operations lec_seq_fops = { | |
1177 | .owner = THIS_MODULE, | |
1178 | .open = lec_seq_open, | |
1179 | .read = seq_read, | |
1180 | .llseek = seq_lseek, | |
1181 | .release = lec_seq_release, | |
1182 | }; | |
1183 | #endif | |
1184 | ||
1185 | static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
1186 | { | |
1187 | struct atm_vcc *vcc = ATM_SD(sock); | |
1188 | int err = 0; | |
1189 | ||
1190 | switch (cmd) { | |
1191 | case ATMLEC_CTRL: | |
1192 | case ATMLEC_MCAST: | |
1193 | case ATMLEC_DATA: | |
1194 | if (!capable(CAP_NET_ADMIN)) | |
1195 | return -EPERM; | |
1196 | break; | |
1197 | default: | |
1198 | return -ENOIOCTLCMD; | |
1199 | } | |
1200 | ||
1201 | switch (cmd) { | |
1202 | case ATMLEC_CTRL: | |
1203 | err = lecd_attach(vcc, (int) arg); | |
1204 | if (err >= 0) | |
1205 | sock->state = SS_CONNECTED; | |
1206 | break; | |
1207 | case ATMLEC_MCAST: | |
1208 | err = lec_mcast_attach(vcc, (int) arg); | |
1209 | break; | |
1210 | case ATMLEC_DATA: | |
1211 | err = lec_vcc_attach(vcc, (void __user *) arg); | |
1212 | break; | |
1213 | } | |
1214 | ||
1215 | return err; | |
1216 | } | |
1217 | ||
1218 | static struct atm_ioctl lane_ioctl_ops = { | |
1219 | .owner = THIS_MODULE, | |
1220 | .ioctl = lane_ioctl, | |
1221 | }; | |
1222 | ||
1223 | static int __init lane_module_init(void) | |
1224 | { | |
1225 | #ifdef CONFIG_PROC_FS | |
1226 | struct proc_dir_entry *p; | |
1227 | ||
1228 | p = create_proc_entry("lec", S_IRUGO, atm_proc_root); | |
1229 | if (p) | |
1230 | p->proc_fops = &lec_seq_fops; | |
1231 | #endif | |
1232 | ||
1233 | register_atm_ioctl(&lane_ioctl_ops); | |
1234 | printk("lec.c: " __DATE__ " " __TIME__ " initialized\n"); | |
1235 | return 0; | |
1236 | } | |
1237 | ||
1238 | static void __exit lane_module_cleanup(void) | |
1239 | { | |
1240 | int i; | |
1241 | struct lec_priv *priv; | |
1242 | ||
1243 | remove_proc_entry("lec", atm_proc_root); | |
1244 | ||
1245 | deregister_atm_ioctl(&lane_ioctl_ops); | |
1246 | ||
1247 | for (i = 0; i < MAX_LEC_ITF; i++) { | |
1248 | if (dev_lec[i] != NULL) { | |
1249 | priv = (struct lec_priv *)dev_lec[i]->priv; | |
1250 | unregister_netdev(dev_lec[i]); | |
1251 | free_netdev(dev_lec[i]); | |
1252 | dev_lec[i] = NULL; | |
1253 | } | |
1254 | } | |
1255 | ||
1256 | return; | |
1257 | } | |
1258 | ||
1259 | module_init(lane_module_init); | |
1260 | module_exit(lane_module_cleanup); | |
1261 | ||
1262 | /* | |
1263 | * LANE2: 3.1.3, LE_RESOLVE.request | |
1264 | * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs. | |
1265 | * If sizeoftlvs == NULL the default TLVs associated with with this | |
1266 | * lec will be used. | |
1267 | * If dst_mac == NULL, targetless LE_ARP will be sent | |
1268 | */ | |
1269 | static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force, | |
1270 | u8 **tlvs, u32 *sizeoftlvs) | |
1271 | { | |
1272 | unsigned long flags; | |
1273 | struct lec_priv *priv = (struct lec_priv *)dev->priv; | |
1274 | struct lec_arp_table *table; | |
1275 | struct sk_buff *skb; | |
1276 | int retval; | |
1277 | ||
1278 | if (force == 0) { | |
1279 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
1280 | table = lec_arp_find(priv, dst_mac); | |
1281 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
1282 | if(table == NULL) | |
1283 | return -1; | |
1284 | ||
1285 | *tlvs = kmalloc(table->sizeoftlvs, GFP_ATOMIC); | |
1286 | if (*tlvs == NULL) | |
1287 | return -1; | |
1288 | ||
1289 | memcpy(*tlvs, table->tlvs, table->sizeoftlvs); | |
1290 | *sizeoftlvs = table->sizeoftlvs; | |
1291 | ||
1292 | return 0; | |
1293 | } | |
1294 | ||
1295 | if (sizeoftlvs == NULL) | |
1296 | retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL); | |
1297 | ||
1298 | else { | |
1299 | skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC); | |
1300 | if (skb == NULL) | |
1301 | return -1; | |
1302 | skb->len = *sizeoftlvs; | |
1303 | memcpy(skb->data, *tlvs, *sizeoftlvs); | |
1304 | retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb); | |
1305 | } | |
1306 | return retval; | |
1307 | } | |
1308 | ||
1309 | ||
1310 | /* | |
1311 | * LANE2: 3.1.4, LE_ASSOCIATE.request | |
1312 | * Associate the *tlvs with the *lan_dst address. | |
1313 | * Will overwrite any previous association | |
1314 | * Returns 1 for success, 0 for failure (out of memory) | |
1315 | * | |
1316 | */ | |
1317 | static int lane2_associate_req (struct net_device *dev, u8 *lan_dst, | |
1318 | u8 *tlvs, u32 sizeoftlvs) | |
1319 | { | |
1320 | int retval; | |
1321 | struct sk_buff *skb; | |
1322 | struct lec_priv *priv = (struct lec_priv*)dev->priv; | |
1323 | ||
d3f4a687 | 1324 | if (compare_ether_addr(lan_dst, dev->dev_addr)) |
1da177e4 LT |
1325 | return (0); /* not our mac address */ |
1326 | ||
1327 | kfree(priv->tlvs); /* NULL if there was no previous association */ | |
1328 | ||
1329 | priv->tlvs = kmalloc(sizeoftlvs, GFP_KERNEL); | |
1330 | if (priv->tlvs == NULL) | |
1331 | return (0); | |
1332 | priv->sizeoftlvs = sizeoftlvs; | |
1333 | memcpy(priv->tlvs, tlvs, sizeoftlvs); | |
1334 | ||
1335 | skb = alloc_skb(sizeoftlvs, GFP_ATOMIC); | |
1336 | if (skb == NULL) | |
1337 | return 0; | |
1338 | skb->len = sizeoftlvs; | |
1339 | memcpy(skb->data, tlvs, sizeoftlvs); | |
1340 | retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb); | |
1341 | if (retval != 0) | |
1342 | printk("lec.c: lane2_associate_req() failed\n"); | |
1343 | /* If the previous association has changed we must | |
1344 | * somehow notify other LANE entities about the change | |
1345 | */ | |
1346 | return (1); | |
1347 | } | |
1348 | ||
1349 | /* | |
1350 | * LANE2: 3.1.5, LE_ASSOCIATE.indication | |
1351 | * | |
1352 | */ | |
1353 | static void lane2_associate_ind (struct net_device *dev, u8 *mac_addr, | |
1354 | u8 *tlvs, u32 sizeoftlvs) | |
1355 | { | |
1356 | #if 0 | |
1357 | int i = 0; | |
1358 | #endif | |
1359 | struct lec_priv *priv = (struct lec_priv *)dev->priv; | |
1360 | #if 0 /* Why have the TLVs in LE_ARP entries since we do not use them? When you | |
1361 | uncomment this code, make sure the TLVs get freed when entry is killed */ | |
1362 | struct lec_arp_table *entry = lec_arp_find(priv, mac_addr); | |
1363 | ||
1364 | if (entry == NULL) | |
1365 | return; /* should not happen */ | |
1366 | ||
1367 | kfree(entry->tlvs); | |
1368 | ||
1369 | entry->tlvs = kmalloc(sizeoftlvs, GFP_KERNEL); | |
1370 | if (entry->tlvs == NULL) | |
1371 | return; | |
1372 | ||
1373 | entry->sizeoftlvs = sizeoftlvs; | |
1374 | memcpy(entry->tlvs, tlvs, sizeoftlvs); | |
1375 | #endif | |
1376 | #if 0 | |
1377 | printk("lec.c: lane2_associate_ind()\n"); | |
1378 | printk("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs); | |
1379 | while (i < sizeoftlvs) | |
1380 | printk("%02x ", tlvs[i++]); | |
1381 | ||
1382 | printk("\n"); | |
1383 | #endif | |
1384 | ||
1385 | /* tell MPOA about the TLVs we saw */ | |
1386 | if (priv->lane2_ops && priv->lane2_ops->associate_indicator) { | |
1387 | priv->lane2_ops->associate_indicator(dev, mac_addr, | |
1388 | tlvs, sizeoftlvs); | |
1389 | } | |
1390 | return; | |
1391 | } | |
1392 | ||
1393 | /* | |
1394 | * Here starts what used to lec_arpc.c | |
1395 | * | |
1396 | * lec_arpc.c was added here when making | |
1397 | * lane client modular. October 1997 | |
1398 | * | |
1399 | */ | |
1400 | ||
1401 | #include <linux/types.h> | |
1402 | #include <linux/sched.h> | |
1403 | #include <linux/timer.h> | |
1404 | #include <asm/param.h> | |
1405 | #include <asm/atomic.h> | |
1406 | #include <linux/inetdevice.h> | |
1407 | #include <net/route.h> | |
1408 | ||
1409 | ||
1410 | #if 0 | |
1411 | #define DPRINTK(format,args...) | |
1412 | /* | |
1413 | #define DPRINTK printk | |
1414 | */ | |
1415 | #endif | |
1416 | #define DEBUG_ARP_TABLE 0 | |
1417 | ||
1418 | #define LEC_ARP_REFRESH_INTERVAL (3*HZ) | |
1419 | ||
1420 | static void lec_arp_check_expire(unsigned long data); | |
1421 | static void lec_arp_expire_arp(unsigned long data); | |
1422 | ||
1423 | /* | |
1424 | * Arp table funcs | |
1425 | */ | |
1426 | ||
1427 | #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE -1)) | |
1428 | ||
1429 | /* | |
1430 | * Initialization of arp-cache | |
1431 | */ | |
1432 | static void | |
1433 | lec_arp_init(struct lec_priv *priv) | |
1434 | { | |
1435 | unsigned short i; | |
1436 | ||
1437 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { | |
1438 | priv->lec_arp_tables[i] = NULL; | |
1439 | } | |
1440 | spin_lock_init(&priv->lec_arp_lock); | |
1441 | init_timer(&priv->lec_arp_timer); | |
1442 | priv->lec_arp_timer.expires = jiffies + LEC_ARP_REFRESH_INTERVAL; | |
1443 | priv->lec_arp_timer.data = (unsigned long)priv; | |
1444 | priv->lec_arp_timer.function = lec_arp_check_expire; | |
1445 | add_timer(&priv->lec_arp_timer); | |
1446 | } | |
1447 | ||
1448 | static void | |
1449 | lec_arp_clear_vccs(struct lec_arp_table *entry) | |
1450 | { | |
1451 | if (entry->vcc) { | |
1452 | struct atm_vcc *vcc = entry->vcc; | |
1453 | struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); | |
1454 | struct net_device *dev = (struct net_device*) vcc->proto_data; | |
1455 | ||
1456 | vcc->pop = vpriv->old_pop; | |
1457 | if (vpriv->xoff) | |
1458 | netif_wake_queue(dev); | |
1459 | kfree(vpriv); | |
1460 | vcc->user_back = NULL; | |
1461 | vcc->push = entry->old_push; | |
1462 | vcc_release_async(vcc, -EPIPE); | |
1463 | vcc = NULL; | |
1464 | } | |
1465 | if (entry->recv_vcc) { | |
1466 | entry->recv_vcc->push = entry->old_recv_push; | |
1467 | vcc_release_async(entry->recv_vcc, -EPIPE); | |
1468 | entry->recv_vcc = NULL; | |
1469 | } | |
1470 | } | |
1471 | ||
1472 | /* | |
1473 | * Insert entry to lec_arp_table | |
1474 | * LANE2: Add to the end of the list to satisfy 8.1.13 | |
1475 | */ | |
1476 | static inline void | |
1477 | lec_arp_add(struct lec_priv *priv, struct lec_arp_table *to_add) | |
1478 | { | |
1479 | unsigned short place; | |
1480 | struct lec_arp_table *tmp; | |
1481 | ||
1482 | place = HASH(to_add->mac_addr[ETH_ALEN-1]); | |
1483 | tmp = priv->lec_arp_tables[place]; | |
1484 | to_add->next = NULL; | |
1485 | if (tmp == NULL) | |
1486 | priv->lec_arp_tables[place] = to_add; | |
1487 | ||
1488 | else { /* add to the end */ | |
1489 | while (tmp->next) | |
1490 | tmp = tmp->next; | |
1491 | tmp->next = to_add; | |
1492 | } | |
1493 | ||
1494 | DPRINTK("LEC_ARP: Added entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n", | |
1495 | 0xff&to_add->mac_addr[0], 0xff&to_add->mac_addr[1], | |
1496 | 0xff&to_add->mac_addr[2], 0xff&to_add->mac_addr[3], | |
1497 | 0xff&to_add->mac_addr[4], 0xff&to_add->mac_addr[5]); | |
1498 | } | |
1499 | ||
1500 | /* | |
1501 | * Remove entry from lec_arp_table | |
1502 | */ | |
1503 | static int | |
1504 | lec_arp_remove(struct lec_priv *priv, | |
1505 | struct lec_arp_table *to_remove) | |
1506 | { | |
1507 | unsigned short place; | |
1508 | struct lec_arp_table *tmp; | |
1509 | int remove_vcc=1; | |
1510 | ||
1511 | if (!to_remove) { | |
1512 | return -1; | |
1513 | } | |
1514 | place = HASH(to_remove->mac_addr[ETH_ALEN-1]); | |
1515 | tmp = priv->lec_arp_tables[place]; | |
1516 | if (tmp == to_remove) { | |
1517 | priv->lec_arp_tables[place] = tmp->next; | |
1518 | } else { | |
1519 | while(tmp && tmp->next != to_remove) { | |
1520 | tmp = tmp->next; | |
1521 | } | |
1522 | if (!tmp) {/* Entry was not found */ | |
1523 | return -1; | |
1524 | } | |
1525 | } | |
1526 | tmp->next = to_remove->next; | |
1527 | del_timer(&to_remove->timer); | |
1528 | ||
1529 | /* If this is the only MAC connected to this VCC, also tear down | |
1530 | the VCC */ | |
1531 | if (to_remove->status >= ESI_FLUSH_PENDING) { | |
1532 | /* | |
1533 | * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT | |
1534 | */ | |
1535 | for(place = 0; place < LEC_ARP_TABLE_SIZE; place++) { | |
1536 | for(tmp = priv->lec_arp_tables[place]; tmp != NULL; tmp = tmp->next) { | |
1537 | if (memcmp(tmp->atm_addr, to_remove->atm_addr, | |
1538 | ATM_ESA_LEN)==0) { | |
1539 | remove_vcc=0; | |
1540 | break; | |
1541 | } | |
1542 | } | |
1543 | } | |
1544 | if (remove_vcc) | |
1545 | lec_arp_clear_vccs(to_remove); | |
1546 | } | |
1547 | skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */ | |
1548 | ||
1549 | DPRINTK("LEC_ARP: Removed entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n", | |
1550 | 0xff&to_remove->mac_addr[0], 0xff&to_remove->mac_addr[1], | |
1551 | 0xff&to_remove->mac_addr[2], 0xff&to_remove->mac_addr[3], | |
1552 | 0xff&to_remove->mac_addr[4], 0xff&to_remove->mac_addr[5]); | |
1553 | return 0; | |
1554 | } | |
1555 | ||
1556 | #if DEBUG_ARP_TABLE | |
1557 | static char* | |
1558 | get_status_string(unsigned char st) | |
1559 | { | |
1560 | switch(st) { | |
1561 | case ESI_UNKNOWN: | |
1562 | return "ESI_UNKNOWN"; | |
1563 | case ESI_ARP_PENDING: | |
1564 | return "ESI_ARP_PENDING"; | |
1565 | case ESI_VC_PENDING: | |
1566 | return "ESI_VC_PENDING"; | |
1567 | case ESI_FLUSH_PENDING: | |
1568 | return "ESI_FLUSH_PENDING"; | |
1569 | case ESI_FORWARD_DIRECT: | |
1570 | return "ESI_FORWARD_DIRECT"; | |
1571 | default: | |
1572 | return "<UNKNOWN>"; | |
1573 | } | |
1574 | } | |
1575 | #endif | |
1576 | ||
1577 | static void | |
1578 | dump_arp_table(struct lec_priv *priv) | |
1579 | { | |
1580 | #if DEBUG_ARP_TABLE | |
1581 | int i,j, offset; | |
1582 | struct lec_arp_table *rulla; | |
1583 | char buf[1024]; | |
1584 | struct lec_arp_table **lec_arp_tables = | |
1585 | (struct lec_arp_table **)priv->lec_arp_tables; | |
1586 | struct lec_arp_table *lec_arp_empty_ones = | |
1587 | (struct lec_arp_table *)priv->lec_arp_empty_ones; | |
1588 | struct lec_arp_table *lec_no_forward = | |
1589 | (struct lec_arp_table *)priv->lec_no_forward; | |
1590 | struct lec_arp_table *mcast_fwds = priv->mcast_fwds; | |
1591 | ||
1592 | ||
1593 | printk("Dump %p:\n",priv); | |
1594 | for (i=0;i<LEC_ARP_TABLE_SIZE;i++) { | |
1595 | rulla = lec_arp_tables[i]; | |
1596 | offset = 0; | |
1597 | offset += sprintf(buf,"%d: %p\n",i, rulla); | |
1598 | while (rulla) { | |
1599 | offset += sprintf(buf+offset,"Mac:"); | |
1600 | for(j=0;j<ETH_ALEN;j++) { | |
1601 | offset+=sprintf(buf+offset, | |
1602 | "%2.2x ", | |
1603 | rulla->mac_addr[j]&0xff); | |
1604 | } | |
1605 | offset +=sprintf(buf+offset,"Atm:"); | |
1606 | for(j=0;j<ATM_ESA_LEN;j++) { | |
1607 | offset+=sprintf(buf+offset, | |
1608 | "%2.2x ", | |
1609 | rulla->atm_addr[j]&0xff); | |
1610 | } | |
1611 | offset+=sprintf(buf+offset, | |
1612 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", | |
1613 | rulla->vcc?rulla->vcc->vpi:0, | |
1614 | rulla->vcc?rulla->vcc->vci:0, | |
1615 | rulla->recv_vcc?rulla->recv_vcc->vpi:0, | |
1616 | rulla->recv_vcc?rulla->recv_vcc->vci:0, | |
1617 | rulla->last_used, | |
1618 | rulla->timestamp, rulla->no_tries); | |
1619 | offset+=sprintf(buf+offset, | |
1620 | "Flags:%x, Packets_flooded:%x, Status: %s ", | |
1621 | rulla->flags, rulla->packets_flooded, | |
1622 | get_status_string(rulla->status)); | |
1623 | offset+=sprintf(buf+offset,"->%p\n",rulla->next); | |
1624 | rulla = rulla->next; | |
1625 | } | |
1626 | printk("%s",buf); | |
1627 | } | |
1628 | rulla = lec_no_forward; | |
1629 | if (rulla) | |
1630 | printk("No forward\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 | rulla = lec_arp_empty_ones; | |
1660 | if (rulla) | |
1661 | printk("Empty ones\n"); | |
1662 | while(rulla) { | |
1663 | offset=0; | |
1664 | offset += sprintf(buf+offset,"Mac:"); | |
1665 | for(j=0;j<ETH_ALEN;j++) { | |
1666 | offset+=sprintf(buf+offset,"%2.2x ", | |
1667 | rulla->mac_addr[j]&0xff); | |
1668 | } | |
1669 | offset +=sprintf(buf+offset,"Atm:"); | |
1670 | for(j=0;j<ATM_ESA_LEN;j++) { | |
1671 | offset+=sprintf(buf+offset,"%2.2x ", | |
1672 | rulla->atm_addr[j]&0xff); | |
1673 | } | |
1674 | offset+=sprintf(buf+offset, | |
1675 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", | |
1676 | rulla->vcc?rulla->vcc->vpi:0, | |
1677 | rulla->vcc?rulla->vcc->vci:0, | |
1678 | rulla->recv_vcc?rulla->recv_vcc->vpi:0, | |
1679 | rulla->recv_vcc?rulla->recv_vcc->vci:0, | |
1680 | rulla->last_used, | |
1681 | rulla->timestamp, rulla->no_tries); | |
1682 | offset+=sprintf(buf+offset, | |
1683 | "Flags:%x, Packets_flooded:%x, Status: %s ", | |
1684 | rulla->flags, rulla->packets_flooded, | |
1685 | get_status_string(rulla->status)); | |
1686 | offset+=sprintf(buf+offset,"->%lx\n",(long)rulla->next); | |
1687 | rulla = rulla->next; | |
1688 | printk("%s",buf); | |
1689 | } | |
1690 | ||
1691 | rulla = mcast_fwds; | |
1692 | if (rulla) | |
1693 | printk("Multicast Forward VCCs\n"); | |
1694 | while(rulla) { | |
1695 | offset=0; | |
1696 | offset += sprintf(buf+offset,"Mac:"); | |
1697 | for(j=0;j<ETH_ALEN;j++) { | |
1698 | offset+=sprintf(buf+offset,"%2.2x ", | |
1699 | rulla->mac_addr[j]&0xff); | |
1700 | } | |
1701 | offset +=sprintf(buf+offset,"Atm:"); | |
1702 | for(j=0;j<ATM_ESA_LEN;j++) { | |
1703 | offset+=sprintf(buf+offset,"%2.2x ", | |
1704 | rulla->atm_addr[j]&0xff); | |
1705 | } | |
1706 | offset+=sprintf(buf+offset, | |
1707 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", | |
1708 | rulla->vcc?rulla->vcc->vpi:0, | |
1709 | rulla->vcc?rulla->vcc->vci:0, | |
1710 | rulla->recv_vcc?rulla->recv_vcc->vpi:0, | |
1711 | rulla->recv_vcc?rulla->recv_vcc->vci:0, | |
1712 | rulla->last_used, | |
1713 | rulla->timestamp, rulla->no_tries); | |
1714 | offset+=sprintf(buf+offset, | |
1715 | "Flags:%x, Packets_flooded:%x, Status: %s ", | |
1716 | rulla->flags, rulla->packets_flooded, | |
1717 | get_status_string(rulla->status)); | |
1718 | offset+=sprintf(buf+offset,"->%lx\n",(long)rulla->next); | |
1719 | rulla = rulla->next; | |
1720 | printk("%s",buf); | |
1721 | } | |
1722 | ||
1723 | #endif | |
1724 | } | |
1725 | ||
1726 | /* | |
1727 | * Destruction of arp-cache | |
1728 | */ | |
1729 | static void | |
1730 | lec_arp_destroy(struct lec_priv *priv) | |
1731 | { | |
1732 | unsigned long flags; | |
1733 | struct lec_arp_table *entry, *next; | |
1734 | int i; | |
1735 | ||
1736 | del_timer_sync(&priv->lec_arp_timer); | |
1737 | ||
1738 | /* | |
1739 | * Remove all entries | |
1740 | */ | |
1741 | ||
1742 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
1743 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { | |
1744 | for(entry = priv->lec_arp_tables[i]; entry != NULL; entry=next) { | |
1745 | next = entry->next; | |
1746 | lec_arp_remove(priv, entry); | |
1747 | kfree(entry); | |
1748 | } | |
1749 | } | |
1750 | entry = priv->lec_arp_empty_ones; | |
1751 | while(entry) { | |
1752 | next = entry->next; | |
1753 | del_timer_sync(&entry->timer); | |
1754 | lec_arp_clear_vccs(entry); | |
1755 | kfree(entry); | |
1756 | entry = next; | |
1757 | } | |
1758 | priv->lec_arp_empty_ones = NULL; | |
1759 | entry = priv->lec_no_forward; | |
1760 | while(entry) { | |
1761 | next = entry->next; | |
1762 | del_timer_sync(&entry->timer); | |
1763 | lec_arp_clear_vccs(entry); | |
1764 | kfree(entry); | |
1765 | entry = next; | |
1766 | } | |
1767 | priv->lec_no_forward = NULL; | |
1768 | entry = priv->mcast_fwds; | |
1769 | while(entry) { | |
1770 | next = entry->next; | |
1771 | /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ | |
1772 | lec_arp_clear_vccs(entry); | |
1773 | kfree(entry); | |
1774 | entry = next; | |
1775 | } | |
1776 | priv->mcast_fwds = NULL; | |
1777 | priv->mcast_vcc = NULL; | |
1778 | memset(priv->lec_arp_tables, 0, | |
1779 | sizeof(struct lec_arp_table *) * LEC_ARP_TABLE_SIZE); | |
1780 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
1781 | } | |
1782 | ||
1783 | ||
1784 | /* | |
1785 | * Find entry by mac_address | |
1786 | */ | |
1787 | static struct lec_arp_table* | |
1788 | lec_arp_find(struct lec_priv *priv, | |
1789 | unsigned char *mac_addr) | |
1790 | { | |
1791 | unsigned short place; | |
1792 | struct lec_arp_table *to_return; | |
1793 | ||
1794 | DPRINTK("LEC_ARP: lec_arp_find :%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n", | |
1795 | mac_addr[0]&0xff, mac_addr[1]&0xff, mac_addr[2]&0xff, | |
1796 | mac_addr[3]&0xff, mac_addr[4]&0xff, mac_addr[5]&0xff); | |
1797 | place = HASH(mac_addr[ETH_ALEN-1]); | |
1798 | ||
1799 | to_return = priv->lec_arp_tables[place]; | |
1800 | while(to_return) { | |
d3f4a687 | 1801 | if (!compare_ether_addr(mac_addr, to_return->mac_addr)) { |
1da177e4 LT |
1802 | return to_return; |
1803 | } | |
1804 | to_return = to_return->next; | |
1805 | } | |
1806 | return NULL; | |
1807 | } | |
1808 | ||
1809 | static struct lec_arp_table* | |
1810 | make_entry(struct lec_priv *priv, unsigned char *mac_addr) | |
1811 | { | |
1812 | struct lec_arp_table *to_return; | |
1813 | ||
0da974f4 | 1814 | to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC); |
1da177e4 LT |
1815 | if (!to_return) { |
1816 | printk("LEC: Arp entry kmalloc failed\n"); | |
1817 | return NULL; | |
1818 | } | |
1da177e4 LT |
1819 | memcpy(to_return->mac_addr, mac_addr, ETH_ALEN); |
1820 | init_timer(&to_return->timer); | |
1821 | to_return->timer.function = lec_arp_expire_arp; | |
1822 | to_return->timer.data = (unsigned long) to_return; | |
1823 | to_return->last_used = jiffies; | |
1824 | to_return->priv = priv; | |
1825 | skb_queue_head_init(&to_return->tx_wait); | |
1826 | return to_return; | |
1827 | } | |
1828 | ||
1829 | /* | |
1830 | * | |
1831 | * Arp sent timer expired | |
1832 | * | |
1833 | */ | |
1834 | static void | |
1835 | lec_arp_expire_arp(unsigned long data) | |
1836 | { | |
1837 | struct lec_arp_table *entry; | |
1838 | ||
1839 | entry = (struct lec_arp_table *)data; | |
1840 | ||
1841 | DPRINTK("lec_arp_expire_arp\n"); | |
1842 | if (entry->status == ESI_ARP_PENDING) { | |
1843 | if (entry->no_tries <= entry->priv->max_retry_count) { | |
1844 | if (entry->is_rdesc) | |
1845 | send_to_lecd(entry->priv, l_rdesc_arp_xmt, entry->mac_addr, NULL, NULL); | |
1846 | else | |
1847 | send_to_lecd(entry->priv, l_arp_xmt, entry->mac_addr, NULL, NULL); | |
1848 | entry->no_tries++; | |
1849 | } | |
1850 | mod_timer(&entry->timer, jiffies + (1*HZ)); | |
1851 | } | |
1852 | } | |
1853 | ||
1854 | /* | |
1855 | * | |
1856 | * Unknown/unused vcc expire, remove associated entry | |
1857 | * | |
1858 | */ | |
1859 | static void | |
1860 | lec_arp_expire_vcc(unsigned long data) | |
1861 | { | |
1862 | unsigned long flags; | |
1863 | struct lec_arp_table *to_remove = (struct lec_arp_table*)data; | |
1864 | struct lec_priv *priv = (struct lec_priv *)to_remove->priv; | |
1865 | struct lec_arp_table *entry = NULL; | |
1866 | ||
1867 | del_timer(&to_remove->timer); | |
1868 | ||
1869 | DPRINTK("LEC_ARP %p %p: lec_arp_expire_vcc vpi:%d vci:%d\n", | |
1870 | to_remove, priv, | |
1871 | to_remove->vcc?to_remove->recv_vcc->vpi:0, | |
1872 | to_remove->vcc?to_remove->recv_vcc->vci:0); | |
1873 | DPRINTK("eo:%p nf:%p\n",priv->lec_arp_empty_ones,priv->lec_no_forward); | |
1874 | ||
1875 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
1876 | if (to_remove == priv->lec_arp_empty_ones) | |
1877 | priv->lec_arp_empty_ones = to_remove->next; | |
1878 | else { | |
1879 | entry = priv->lec_arp_empty_ones; | |
1880 | while (entry && entry->next != to_remove) | |
1881 | entry = entry->next; | |
1882 | if (entry) | |
1883 | entry->next = to_remove->next; | |
1884 | } | |
1885 | if (!entry) { | |
1886 | if (to_remove == priv->lec_no_forward) { | |
1887 | priv->lec_no_forward = to_remove->next; | |
1888 | } else { | |
1889 | entry = priv->lec_no_forward; | |
1890 | while (entry && entry->next != to_remove) | |
1891 | entry = entry->next; | |
1892 | if (entry) | |
1893 | entry->next = to_remove->next; | |
1894 | } | |
1895 | } | |
1896 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
1897 | ||
1898 | lec_arp_clear_vccs(to_remove); | |
1899 | kfree(to_remove); | |
1900 | } | |
1901 | ||
1902 | /* | |
1903 | * Expire entries. | |
1904 | * 1. Re-set timer | |
1905 | * 2. For each entry, delete entries that have aged past the age limit. | |
1906 | * 3. For each entry, depending on the status of the entry, perform | |
1907 | * the following maintenance. | |
1908 | * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the | |
1909 | * tick_count is above the max_unknown_frame_time, clear | |
1910 | * the tick_count to zero and clear the packets_flooded counter | |
1911 | * to zero. This supports the packet rate limit per address | |
1912 | * while flooding unknowns. | |
1913 | * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater | |
1914 | * than or equal to the path_switching_delay, change the status | |
1915 | * to ESI_FORWARD_DIRECT. This causes the flush period to end | |
1916 | * regardless of the progress of the flush protocol. | |
1917 | */ | |
1918 | static void | |
1919 | lec_arp_check_expire(unsigned long data) | |
1920 | { | |
1921 | unsigned long flags; | |
1922 | struct lec_priv *priv = (struct lec_priv *)data; | |
1923 | struct lec_arp_table *entry, *next; | |
1924 | unsigned long now; | |
1925 | unsigned long time_to_check; | |
1926 | int i; | |
1927 | ||
1928 | DPRINTK("lec_arp_check_expire %p\n",priv); | |
1929 | DPRINTK("expire: eo:%p nf:%p\n",priv->lec_arp_empty_ones, | |
1930 | priv->lec_no_forward); | |
1931 | now = jiffies; | |
1932 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
1933 | for(i = 0; i < LEC_ARP_TABLE_SIZE; i++) { | |
1934 | for(entry = priv->lec_arp_tables[i]; entry != NULL; ) { | |
1935 | if ((entry->flags) & LEC_REMOTE_FLAG && | |
1936 | priv->topology_change) | |
1937 | time_to_check = priv->forward_delay_time; | |
1938 | else | |
1939 | time_to_check = priv->aging_time; | |
1940 | ||
1941 | DPRINTK("About to expire: %lx - %lx > %lx\n", | |
1942 | now,entry->last_used, time_to_check); | |
1943 | if( time_after(now, entry->last_used+ | |
1944 | time_to_check) && | |
1945 | !(entry->flags & LEC_PERMANENT_FLAG) && | |
1946 | !(entry->mac_addr[0] & 0x01) ) { /* LANE2: 7.1.20 */ | |
1947 | /* Remove entry */ | |
1948 | DPRINTK("LEC:Entry timed out\n"); | |
1949 | next = entry->next; | |
1950 | lec_arp_remove(priv, entry); | |
1951 | kfree(entry); | |
1952 | entry = next; | |
1953 | } else { | |
1954 | /* Something else */ | |
1955 | if ((entry->status == ESI_VC_PENDING || | |
1956 | entry->status == ESI_ARP_PENDING) | |
1957 | && time_after_eq(now, | |
1958 | entry->timestamp + | |
1959 | priv->max_unknown_frame_time)) { | |
1960 | entry->timestamp = jiffies; | |
1961 | entry->packets_flooded = 0; | |
1962 | if (entry->status == ESI_VC_PENDING) | |
1963 | send_to_lecd(priv, l_svc_setup, entry->mac_addr, entry->atm_addr, NULL); | |
1964 | } | |
1965 | if (entry->status == ESI_FLUSH_PENDING | |
1966 | && | |
1967 | time_after_eq(now, entry->timestamp+ | |
1968 | priv->path_switching_delay)) { | |
1969 | struct sk_buff *skb; | |
1970 | ||
1971 | while ((skb = skb_dequeue(&entry->tx_wait)) != NULL) | |
1972 | lec_send(entry->vcc, skb, entry->priv); | |
1973 | entry->last_used = jiffies; | |
1974 | entry->status = | |
1975 | ESI_FORWARD_DIRECT; | |
1976 | } | |
1977 | entry = entry->next; | |
1978 | } | |
1979 | } | |
1980 | } | |
1981 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
1982 | ||
1983 | mod_timer(&priv->lec_arp_timer, jiffies + LEC_ARP_REFRESH_INTERVAL); | |
1984 | } | |
1985 | /* | |
1986 | * Try to find vcc where mac_address is attached. | |
1987 | * | |
1988 | */ | |
1989 | static struct atm_vcc* | |
1990 | lec_arp_resolve(struct lec_priv *priv, unsigned char *mac_to_find, | |
1991 | int is_rdesc, struct lec_arp_table **ret_entry) | |
1992 | { | |
1993 | unsigned long flags; | |
1994 | struct lec_arp_table *entry; | |
1995 | struct atm_vcc *found; | |
1996 | ||
1997 | if (mac_to_find[0] & 0x01) { | |
1998 | switch (priv->lane_version) { | |
1999 | case 1: | |
2000 | return priv->mcast_vcc; | |
2001 | break; | |
2002 | case 2: /* LANE2 wants arp for multicast addresses */ | |
d3f4a687 | 2003 | if (!compare_ether_addr(mac_to_find, bus_mac)) |
1da177e4 LT |
2004 | return priv->mcast_vcc; |
2005 | break; | |
2006 | default: | |
2007 | break; | |
2008 | } | |
2009 | } | |
2010 | ||
2011 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
2012 | entry = lec_arp_find(priv, mac_to_find); | |
2013 | ||
2014 | if (entry) { | |
2015 | if (entry->status == ESI_FORWARD_DIRECT) { | |
2016 | /* Connection Ok */ | |
2017 | entry->last_used = jiffies; | |
2018 | *ret_entry = entry; | |
2019 | found = entry->vcc; | |
2020 | goto out; | |
2021 | } | |
75b895c1 ST |
2022 | /* If the LE_ARP cache entry is still pending, reset count to 0 |
2023 | * so another LE_ARP request can be made for this frame. | |
2024 | */ | |
2025 | if (entry->status == ESI_ARP_PENDING) { | |
2026 | entry->no_tries = 0; | |
2027 | } | |
1da177e4 LT |
2028 | /* Data direct VC not yet set up, check to see if the unknown |
2029 | frame count is greater than the limit. If the limit has | |
2030 | not been reached, allow the caller to send packet to | |
2031 | BUS. */ | |
2032 | if (entry->status != ESI_FLUSH_PENDING && | |
2033 | entry->packets_flooded<priv->maximum_unknown_frame_count) { | |
2034 | entry->packets_flooded++; | |
2035 | DPRINTK("LEC_ARP: Flooding..\n"); | |
2036 | found = priv->mcast_vcc; | |
2037 | goto out; | |
2038 | } | |
2039 | /* We got here because entry->status == ESI_FLUSH_PENDING | |
2040 | * or BUS flood limit was reached for an entry which is | |
2041 | * in ESI_ARP_PENDING or ESI_VC_PENDING state. | |
2042 | */ | |
2043 | *ret_entry = entry; | |
2044 | DPRINTK("lec: entry->status %d entry->vcc %p\n", entry->status, entry->vcc); | |
2045 | found = NULL; | |
2046 | } else { | |
2047 | /* No matching entry was found */ | |
2048 | entry = make_entry(priv, mac_to_find); | |
2049 | DPRINTK("LEC_ARP: Making entry\n"); | |
2050 | if (!entry) { | |
2051 | found = priv->mcast_vcc; | |
2052 | goto out; | |
2053 | } | |
2054 | lec_arp_add(priv, entry); | |
2055 | /* We want arp-request(s) to be sent */ | |
2056 | entry->packets_flooded =1; | |
2057 | entry->status = ESI_ARP_PENDING; | |
2058 | entry->no_tries = 1; | |
2059 | entry->last_used = entry->timestamp = jiffies; | |
2060 | entry->is_rdesc = is_rdesc; | |
2061 | if (entry->is_rdesc) | |
2062 | send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL, NULL); | |
2063 | else | |
2064 | send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL); | |
2065 | entry->timer.expires = jiffies + (1*HZ); | |
2066 | entry->timer.function = lec_arp_expire_arp; | |
2067 | add_timer(&entry->timer); | |
2068 | found = priv->mcast_vcc; | |
2069 | } | |
2070 | ||
2071 | out: | |
2072 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
2073 | return found; | |
2074 | } | |
2075 | ||
2076 | static int | |
2077 | lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr, | |
2078 | unsigned long permanent) | |
2079 | { | |
2080 | unsigned long flags; | |
2081 | struct lec_arp_table *entry, *next; | |
2082 | int i; | |
2083 | ||
2084 | DPRINTK("lec_addr_delete\n"); | |
2085 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
2086 | for(i = 0; i < LEC_ARP_TABLE_SIZE; i++) { | |
2087 | for(entry = priv->lec_arp_tables[i]; entry != NULL; entry = next) { | |
2088 | next = entry->next; | |
2089 | if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN) | |
2090 | && (permanent || | |
2091 | !(entry->flags & LEC_PERMANENT_FLAG))) { | |
2092 | lec_arp_remove(priv, entry); | |
2093 | kfree(entry); | |
2094 | } | |
2095 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
2096 | return 0; | |
2097 | } | |
2098 | } | |
2099 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
2100 | return -1; | |
2101 | } | |
2102 | ||
2103 | /* | |
2104 | * Notifies: Response to arp_request (atm_addr != NULL) | |
2105 | */ | |
2106 | static void | |
2107 | lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr, | |
2108 | unsigned char *atm_addr, unsigned long remoteflag, | |
2109 | unsigned int targetless_le_arp) | |
2110 | { | |
2111 | unsigned long flags; | |
2112 | struct lec_arp_table *entry, *tmp; | |
2113 | int i; | |
2114 | ||
2115 | DPRINTK("lec:%s", (targetless_le_arp) ? "targetless ": " "); | |
2116 | DPRINTK("lec_arp_update mac:%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n", | |
2117 | mac_addr[0],mac_addr[1],mac_addr[2],mac_addr[3], | |
2118 | mac_addr[4],mac_addr[5]); | |
2119 | ||
2120 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
2121 | entry = lec_arp_find(priv, mac_addr); | |
2122 | if (entry == NULL && targetless_le_arp) | |
2123 | goto out; /* LANE2: ignore targetless LE_ARPs for which | |
2124 | * we have no entry in the cache. 7.1.30 | |
2125 | */ | |
2126 | if (priv->lec_arp_empty_ones) { | |
2127 | entry = priv->lec_arp_empty_ones; | |
2128 | if (!memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN)) { | |
2129 | priv->lec_arp_empty_ones = entry->next; | |
2130 | } else { | |
2131 | while(entry->next && memcmp(entry->next->atm_addr, | |
2132 | atm_addr, ATM_ESA_LEN)) | |
2133 | entry = entry->next; | |
2134 | if (entry->next) { | |
2135 | tmp = entry; | |
2136 | entry = entry->next; | |
2137 | tmp->next = entry->next; | |
2138 | } else | |
2139 | entry = NULL; | |
2140 | ||
2141 | } | |
2142 | if (entry) { | |
2143 | del_timer(&entry->timer); | |
2144 | tmp = lec_arp_find(priv, mac_addr); | |
2145 | if (tmp) { | |
2146 | del_timer(&tmp->timer); | |
2147 | tmp->status = ESI_FORWARD_DIRECT; | |
2148 | memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN); | |
2149 | tmp->vcc = entry->vcc; | |
2150 | tmp->old_push = entry->old_push; | |
2151 | tmp->last_used = jiffies; | |
2152 | del_timer(&entry->timer); | |
2153 | kfree(entry); | |
2154 | entry=tmp; | |
2155 | } else { | |
2156 | entry->status = ESI_FORWARD_DIRECT; | |
2157 | memcpy(entry->mac_addr, mac_addr, ETH_ALEN); | |
2158 | entry->last_used = jiffies; | |
2159 | lec_arp_add(priv, entry); | |
2160 | } | |
2161 | if (remoteflag) | |
2162 | entry->flags|=LEC_REMOTE_FLAG; | |
2163 | else | |
2164 | entry->flags&=~LEC_REMOTE_FLAG; | |
2165 | DPRINTK("After update\n"); | |
2166 | dump_arp_table(priv); | |
2167 | goto out; | |
2168 | } | |
2169 | } | |
2170 | entry = lec_arp_find(priv, mac_addr); | |
2171 | if (!entry) { | |
2172 | entry = make_entry(priv, mac_addr); | |
2173 | if (!entry) | |
2174 | goto out; | |
2175 | entry->status = ESI_UNKNOWN; | |
2176 | lec_arp_add(priv, entry); | |
2177 | /* Temporary, changes before end of function */ | |
2178 | } | |
2179 | memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN); | |
2180 | del_timer(&entry->timer); | |
2181 | for(i = 0; i < LEC_ARP_TABLE_SIZE; i++) { | |
2182 | for(tmp = priv->lec_arp_tables[i]; tmp; tmp=tmp->next) { | |
2183 | if (entry != tmp && | |
2184 | !memcmp(tmp->atm_addr, atm_addr, | |
2185 | ATM_ESA_LEN)) { | |
2186 | /* Vcc to this host exists */ | |
2187 | if (tmp->status > ESI_VC_PENDING) { | |
2188 | /* | |
2189 | * ESI_FLUSH_PENDING, | |
2190 | * ESI_FORWARD_DIRECT | |
2191 | */ | |
2192 | entry->vcc = tmp->vcc; | |
2193 | entry->old_push=tmp->old_push; | |
2194 | } | |
2195 | entry->status=tmp->status; | |
2196 | break; | |
2197 | } | |
2198 | } | |
2199 | } | |
2200 | if (remoteflag) | |
2201 | entry->flags|=LEC_REMOTE_FLAG; | |
2202 | else | |
2203 | entry->flags&=~LEC_REMOTE_FLAG; | |
2204 | if (entry->status == ESI_ARP_PENDING || | |
2205 | entry->status == ESI_UNKNOWN) { | |
2206 | entry->status = ESI_VC_PENDING; | |
2207 | send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL); | |
2208 | } | |
2209 | DPRINTK("After update2\n"); | |
2210 | dump_arp_table(priv); | |
2211 | out: | |
2212 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
2213 | } | |
2214 | ||
2215 | /* | |
2216 | * Notifies: Vcc setup ready | |
2217 | */ | |
2218 | static void | |
2219 | lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data, | |
2220 | struct atm_vcc *vcc, | |
2221 | void (*old_push)(struct atm_vcc *vcc, struct sk_buff *skb)) | |
2222 | { | |
2223 | unsigned long flags; | |
2224 | struct lec_arp_table *entry; | |
2225 | int i, found_entry=0; | |
2226 | ||
2227 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
2228 | if (ioc_data->receive == 2) { | |
2229 | /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */ | |
2230 | ||
2231 | DPRINTK("LEC_ARP: Attaching mcast forward\n"); | |
2232 | #if 0 | |
2233 | entry = lec_arp_find(priv, bus_mac); | |
2234 | if (!entry) { | |
2235 | printk("LEC_ARP: Multicast entry not found!\n"); | |
2236 | goto out; | |
2237 | } | |
2238 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); | |
2239 | entry->recv_vcc = vcc; | |
2240 | entry->old_recv_push = old_push; | |
2241 | #endif | |
2242 | entry = make_entry(priv, bus_mac); | |
2243 | if (entry == NULL) | |
2244 | goto out; | |
2245 | del_timer(&entry->timer); | |
2246 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); | |
2247 | entry->recv_vcc = vcc; | |
2248 | entry->old_recv_push = old_push; | |
2249 | entry->next = priv->mcast_fwds; | |
2250 | priv->mcast_fwds = entry; | |
2251 | goto out; | |
2252 | } else if (ioc_data->receive == 1) { | |
2253 | /* Vcc which we don't want to make default vcc, attach it | |
2254 | anyway. */ | |
2255 | 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", | |
2256 | ioc_data->atm_addr[0],ioc_data->atm_addr[1], | |
2257 | ioc_data->atm_addr[2],ioc_data->atm_addr[3], | |
2258 | ioc_data->atm_addr[4],ioc_data->atm_addr[5], | |
2259 | ioc_data->atm_addr[6],ioc_data->atm_addr[7], | |
2260 | ioc_data->atm_addr[8],ioc_data->atm_addr[9], | |
2261 | ioc_data->atm_addr[10],ioc_data->atm_addr[11], | |
2262 | ioc_data->atm_addr[12],ioc_data->atm_addr[13], | |
2263 | ioc_data->atm_addr[14],ioc_data->atm_addr[15], | |
2264 | ioc_data->atm_addr[16],ioc_data->atm_addr[17], | |
2265 | ioc_data->atm_addr[18],ioc_data->atm_addr[19]); | |
2266 | entry = make_entry(priv, bus_mac); | |
2267 | if (entry == NULL) | |
2268 | goto out; | |
2269 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); | |
2270 | memset(entry->mac_addr, 0, ETH_ALEN); | |
2271 | entry->recv_vcc = vcc; | |
2272 | entry->old_recv_push = old_push; | |
2273 | entry->status = ESI_UNKNOWN; | |
2274 | entry->timer.expires = jiffies + priv->vcc_timeout_period; | |
2275 | entry->timer.function = lec_arp_expire_vcc; | |
2276 | add_timer(&entry->timer); | |
2277 | entry->next = priv->lec_no_forward; | |
2278 | priv->lec_no_forward = entry; | |
2279 | dump_arp_table(priv); | |
2280 | goto out; | |
2281 | } | |
2282 | 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", | |
2283 | ioc_data->atm_addr[0],ioc_data->atm_addr[1], | |
2284 | ioc_data->atm_addr[2],ioc_data->atm_addr[3], | |
2285 | ioc_data->atm_addr[4],ioc_data->atm_addr[5], | |
2286 | ioc_data->atm_addr[6],ioc_data->atm_addr[7], | |
2287 | ioc_data->atm_addr[8],ioc_data->atm_addr[9], | |
2288 | ioc_data->atm_addr[10],ioc_data->atm_addr[11], | |
2289 | ioc_data->atm_addr[12],ioc_data->atm_addr[13], | |
2290 | ioc_data->atm_addr[14],ioc_data->atm_addr[15], | |
2291 | ioc_data->atm_addr[16],ioc_data->atm_addr[17], | |
2292 | ioc_data->atm_addr[18],ioc_data->atm_addr[19]); | |
2293 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { | |
2294 | for (entry = priv->lec_arp_tables[i]; entry; entry=entry->next) { | |
2295 | if (memcmp(ioc_data->atm_addr, entry->atm_addr, | |
2296 | ATM_ESA_LEN)==0) { | |
2297 | DPRINTK("LEC_ARP: Attaching data direct\n"); | |
2298 | DPRINTK("Currently -> Vcc: %d, Rvcc:%d\n", | |
2299 | entry->vcc?entry->vcc->vci:0, | |
2300 | entry->recv_vcc?entry->recv_vcc->vci:0); | |
2301 | found_entry=1; | |
2302 | del_timer(&entry->timer); | |
2303 | entry->vcc = vcc; | |
2304 | entry->old_push = old_push; | |
2305 | if (entry->status == ESI_VC_PENDING) { | |
2306 | if(priv->maximum_unknown_frame_count | |
2307 | ==0) | |
2308 | entry->status = | |
2309 | ESI_FORWARD_DIRECT; | |
2310 | else { | |
2311 | entry->timestamp = jiffies; | |
2312 | entry->status = | |
2313 | ESI_FLUSH_PENDING; | |
2314 | #if 0 | |
2315 | send_to_lecd(priv,l_flush_xmt, | |
2316 | NULL, | |
2317 | entry->atm_addr, | |
2318 | NULL); | |
2319 | #endif | |
2320 | } | |
2321 | } else { | |
2322 | /* They were forming a connection | |
2323 | to us, and we to them. Our | |
2324 | ATM address is numerically lower | |
2325 | than theirs, so we make connection | |
2326 | we formed into default VCC (8.1.11). | |
2327 | Connection they made gets torn | |
2328 | down. This might confuse some | |
2329 | clients. Can be changed if | |
2330 | someone reports trouble... */ | |
2331 | ; | |
2332 | } | |
2333 | } | |
2334 | } | |
2335 | } | |
2336 | if (found_entry) { | |
2337 | DPRINTK("After vcc was added\n"); | |
2338 | dump_arp_table(priv); | |
2339 | goto out; | |
2340 | } | |
2341 | /* Not found, snatch address from first data packet that arrives from | |
2342 | this vcc */ | |
2343 | entry = make_entry(priv, bus_mac); | |
2344 | if (!entry) | |
2345 | goto out; | |
2346 | entry->vcc = vcc; | |
2347 | entry->old_push = old_push; | |
2348 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); | |
2349 | memset(entry->mac_addr, 0, ETH_ALEN); | |
2350 | entry->status = ESI_UNKNOWN; | |
2351 | entry->next = priv->lec_arp_empty_ones; | |
2352 | priv->lec_arp_empty_ones = entry; | |
2353 | entry->timer.expires = jiffies + priv->vcc_timeout_period; | |
2354 | entry->timer.function = lec_arp_expire_vcc; | |
2355 | add_timer(&entry->timer); | |
2356 | DPRINTK("After vcc was added\n"); | |
2357 | dump_arp_table(priv); | |
2358 | out: | |
2359 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
2360 | } | |
2361 | ||
2362 | static void | |
2363 | lec_flush_complete(struct lec_priv *priv, unsigned long tran_id) | |
2364 | { | |
2365 | unsigned long flags; | |
2366 | struct lec_arp_table *entry; | |
2367 | int i; | |
2368 | ||
2369 | DPRINTK("LEC:lec_flush_complete %lx\n",tran_id); | |
2370 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
2371 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { | |
2372 | for (entry = priv->lec_arp_tables[i]; entry; entry=entry->next) { | |
2373 | if (entry->flush_tran_id == tran_id && | |
2374 | entry->status == ESI_FLUSH_PENDING) { | |
2375 | struct sk_buff *skb; | |
2376 | ||
2377 | while ((skb = skb_dequeue(&entry->tx_wait)) != NULL) | |
2378 | lec_send(entry->vcc, skb, entry->priv); | |
2379 | entry->status = ESI_FORWARD_DIRECT; | |
2380 | DPRINTK("LEC_ARP: Flushed\n"); | |
2381 | } | |
2382 | } | |
2383 | } | |
2384 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
2385 | dump_arp_table(priv); | |
2386 | } | |
2387 | ||
2388 | static void | |
2389 | lec_set_flush_tran_id(struct lec_priv *priv, | |
2390 | unsigned char *atm_addr, unsigned long tran_id) | |
2391 | { | |
2392 | unsigned long flags; | |
2393 | struct lec_arp_table *entry; | |
2394 | int i; | |
2395 | ||
2396 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
2397 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) | |
2398 | for(entry = priv->lec_arp_tables[i]; entry; entry=entry->next) | |
2399 | if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) { | |
2400 | entry->flush_tran_id = tran_id; | |
2401 | DPRINTK("Set flush transaction id to %lx for %p\n",tran_id,entry); | |
2402 | } | |
2403 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
2404 | } | |
2405 | ||
2406 | static int | |
2407 | lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc) | |
2408 | { | |
2409 | unsigned long flags; | |
2410 | unsigned char mac_addr[] = { | |
2411 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; | |
2412 | struct lec_arp_table *to_add; | |
2413 | struct lec_vcc_priv *vpriv; | |
2414 | int err = 0; | |
2415 | ||
2416 | if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL))) | |
2417 | return -ENOMEM; | |
2418 | vpriv->xoff = 0; | |
2419 | vpriv->old_pop = vcc->pop; | |
2420 | vcc->user_back = vpriv; | |
2421 | vcc->pop = lec_pop; | |
2422 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
2423 | to_add = make_entry(priv, mac_addr); | |
2424 | if (!to_add) { | |
2425 | vcc->pop = vpriv->old_pop; | |
2426 | kfree(vpriv); | |
2427 | err = -ENOMEM; | |
2428 | goto out; | |
2429 | } | |
2430 | memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN); | |
2431 | to_add->status = ESI_FORWARD_DIRECT; | |
2432 | to_add->flags |= LEC_PERMANENT_FLAG; | |
2433 | to_add->vcc = vcc; | |
2434 | to_add->old_push = vcc->push; | |
2435 | vcc->push = lec_push; | |
2436 | priv->mcast_vcc = vcc; | |
2437 | lec_arp_add(priv, to_add); | |
2438 | out: | |
2439 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
2440 | return err; | |
2441 | } | |
2442 | ||
2443 | static void | |
2444 | lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc) | |
2445 | { | |
2446 | unsigned long flags; | |
2447 | struct lec_arp_table *entry, *next; | |
2448 | int i; | |
2449 | ||
2450 | DPRINTK("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n",vcc->vpi,vcc->vci); | |
2451 | dump_arp_table(priv); | |
2452 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
2453 | for(i=0;i<LEC_ARP_TABLE_SIZE;i++) { | |
2454 | for(entry = priv->lec_arp_tables[i];entry; entry=next) { | |
2455 | next = entry->next; | |
2456 | if (vcc == entry->vcc) { | |
2457 | lec_arp_remove(priv, entry); | |
2458 | kfree(entry); | |
2459 | if (priv->mcast_vcc == vcc) { | |
2460 | priv->mcast_vcc = NULL; | |
2461 | } | |
2462 | } | |
2463 | } | |
2464 | } | |
2465 | ||
2466 | entry = priv->lec_arp_empty_ones; | |
2467 | priv->lec_arp_empty_ones = NULL; | |
2468 | while (entry != NULL) { | |
2469 | next = entry->next; | |
2470 | if (entry->vcc == vcc) { /* leave it out from the list */ | |
2471 | lec_arp_clear_vccs(entry); | |
2472 | del_timer(&entry->timer); | |
2473 | kfree(entry); | |
2474 | } | |
2475 | else { /* put it back to the list */ | |
2476 | entry->next = priv->lec_arp_empty_ones; | |
2477 | priv->lec_arp_empty_ones = entry; | |
2478 | } | |
2479 | entry = next; | |
2480 | } | |
2481 | ||
2482 | entry = priv->lec_no_forward; | |
2483 | priv->lec_no_forward = NULL; | |
2484 | while (entry != NULL) { | |
2485 | next = entry->next; | |
2486 | if (entry->recv_vcc == vcc) { | |
2487 | lec_arp_clear_vccs(entry); | |
2488 | del_timer(&entry->timer); | |
2489 | kfree(entry); | |
2490 | } | |
2491 | else { | |
2492 | entry->next = priv->lec_no_forward; | |
2493 | priv->lec_no_forward = entry; | |
2494 | } | |
2495 | entry = next; | |
2496 | } | |
2497 | ||
2498 | entry = priv->mcast_fwds; | |
2499 | priv->mcast_fwds = NULL; | |
2500 | while (entry != NULL) { | |
2501 | next = entry->next; | |
2502 | if (entry->recv_vcc == vcc) { | |
2503 | lec_arp_clear_vccs(entry); | |
2504 | /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ | |
2505 | kfree(entry); | |
2506 | } | |
2507 | else { | |
2508 | entry->next = priv->mcast_fwds; | |
2509 | priv->mcast_fwds = entry; | |
2510 | } | |
2511 | entry = next; | |
2512 | } | |
2513 | ||
2514 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
2515 | dump_arp_table(priv); | |
2516 | } | |
2517 | ||
2518 | static void | |
2519 | lec_arp_check_empties(struct lec_priv *priv, | |
2520 | struct atm_vcc *vcc, struct sk_buff *skb) | |
2521 | { | |
2522 | unsigned long flags; | |
2523 | struct lec_arp_table *entry, *prev; | |
2524 | struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data; | |
2525 | unsigned char *src; | |
2526 | #ifdef CONFIG_TR | |
2527 | struct lecdatahdr_8025 *tr_hdr = (struct lecdatahdr_8025 *)skb->data; | |
2528 | ||
2529 | if (priv->is_trdev) src = tr_hdr->h_source; | |
2530 | else | |
2531 | #endif | |
2532 | src = hdr->h_source; | |
2533 | ||
2534 | spin_lock_irqsave(&priv->lec_arp_lock, flags); | |
2535 | entry = priv->lec_arp_empty_ones; | |
2536 | if (vcc == entry->vcc) { | |
2537 | del_timer(&entry->timer); | |
2538 | memcpy(entry->mac_addr, src, ETH_ALEN); | |
2539 | entry->status = ESI_FORWARD_DIRECT; | |
2540 | entry->last_used = jiffies; | |
2541 | priv->lec_arp_empty_ones = entry->next; | |
2542 | /* We might have got an entry */ | |
2543 | if ((prev = lec_arp_find(priv,src))) { | |
2544 | lec_arp_remove(priv, prev); | |
2545 | kfree(prev); | |
2546 | } | |
2547 | lec_arp_add(priv, entry); | |
2548 | goto out; | |
2549 | } | |
2550 | prev = entry; | |
2551 | entry = entry->next; | |
2552 | while (entry && entry->vcc != vcc) { | |
2553 | prev= entry; | |
2554 | entry = entry->next; | |
2555 | } | |
2556 | if (!entry) { | |
2557 | DPRINTK("LEC_ARP: Arp_check_empties: entry not found!\n"); | |
2558 | goto out; | |
2559 | } | |
2560 | del_timer(&entry->timer); | |
2561 | memcpy(entry->mac_addr, src, ETH_ALEN); | |
2562 | entry->status = ESI_FORWARD_DIRECT; | |
2563 | entry->last_used = jiffies; | |
2564 | prev->next = entry->next; | |
2565 | if ((prev = lec_arp_find(priv, src))) { | |
2566 | lec_arp_remove(priv, prev); | |
2567 | kfree(prev); | |
2568 | } | |
2569 | lec_arp_add(priv, entry); | |
2570 | out: | |
2571 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); | |
2572 | } | |
2573 | MODULE_LICENSE("GPL"); |