Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * NET3: Token ring device handling subroutines | |
9afa0949 | 3 | * |
1da177e4 LT |
4 | * This program is free software; you can redistribute it and/or |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | * | |
9 | * Fixes: 3 Feb 97 Paul Norton <pnorton@cts.com> Minor routing fixes. | |
10 | * Added rif table to /proc/net/tr_rif and rif timeout to | |
11 | * /proc/sys/net/token-ring/rif_timeout. | |
12 | * 22 Jun 98 Paul Norton <p.norton@computer.org> Rearranged | |
13 | * tr_header and tr_type_trans to handle passing IPX SNAP and | |
14 | * 802.2 through the correct layers. Eliminated tr_reformat. | |
9afa0949 | 15 | * |
1da177e4 LT |
16 | */ |
17 | ||
18 | #include <asm/uaccess.h> | |
19 | #include <asm/system.h> | |
1da177e4 LT |
20 | #include <linux/module.h> |
21 | #include <linux/types.h> | |
22 | #include <linux/kernel.h> | |
23 | #include <linux/jiffies.h> | |
24 | #include <linux/string.h> | |
25 | #include <linux/mm.h> | |
26 | #include <linux/socket.h> | |
27 | #include <linux/in.h> | |
28 | #include <linux/inet.h> | |
29 | #include <linux/netdevice.h> | |
30 | #include <linux/trdevice.h> | |
31 | #include <linux/skbuff.h> | |
32 | #include <linux/errno.h> | |
33 | #include <linux/timer.h> | |
34 | #include <linux/net.h> | |
35 | #include <linux/proc_fs.h> | |
36 | #include <linux/seq_file.h> | |
37 | #include <linux/init.h> | |
38 | #include <net/arp.h> | |
457c4cbc | 39 | #include <net/net_namespace.h> |
1da177e4 LT |
40 | |
41 | static void tr_add_rif_info(struct trh_hdr *trh, struct net_device *dev); | |
42 | static void rif_check_expire(unsigned long dummy); | |
43 | ||
44 | #define TR_SR_DEBUG 0 | |
45 | ||
46 | /* | |
47 | * Each RIF entry we learn is kept this way | |
48 | */ | |
9afa0949 | 49 | |
c8b35d2a | 50 | struct rif_cache { |
1da177e4 LT |
51 | unsigned char addr[TR_ALEN]; |
52 | int iface; | |
c6b33653 AD |
53 | __be16 rcf; |
54 | __be16 rseg[8]; | |
c8b35d2a | 55 | struct rif_cache *next; |
1da177e4 LT |
56 | unsigned long last_used; |
57 | unsigned char local_ring; | |
58 | }; | |
59 | ||
60 | #define RIF_TABLE_SIZE 32 | |
61 | ||
62 | /* | |
63 | * We hash the RIF cache 32 ways. We do after all have to look it | |
64 | * up a lot. | |
65 | */ | |
9afa0949 | 66 | |
c8b35d2a | 67 | static struct rif_cache *rif_table[RIF_TABLE_SIZE]; |
1da177e4 LT |
68 | |
69 | static DEFINE_SPINLOCK(rif_lock); | |
70 | ||
71 | ||
72 | /* | |
73 | * Garbage disposal timer. | |
74 | */ | |
9afa0949 | 75 | |
1da177e4 LT |
76 | static struct timer_list rif_timer; |
77 | ||
78 | int sysctl_tr_rif_timeout = 60*10*HZ; | |
79 | ||
80 | static inline unsigned long rif_hash(const unsigned char *addr) | |
81 | { | |
82 | unsigned long x; | |
83 | ||
84 | x = addr[0]; | |
85 | x = (x << 2) ^ addr[1]; | |
86 | x = (x << 2) ^ addr[2]; | |
87 | x = (x << 2) ^ addr[3]; | |
88 | x = (x << 2) ^ addr[4]; | |
89 | x = (x << 2) ^ addr[5]; | |
90 | ||
91 | x ^= x >> 8; | |
92 | ||
93 | return x & (RIF_TABLE_SIZE - 1); | |
94 | } | |
95 | ||
96 | /* | |
97 | * Put the headers on a token ring packet. Token ring source routing | |
98 | * makes this a little more exciting than on ethernet. | |
99 | */ | |
9afa0949 | 100 | |
1da177e4 LT |
101 | static int tr_header(struct sk_buff *skb, struct net_device *dev, |
102 | unsigned short type, | |
9afa0949 | 103 | void *daddr, void *saddr, unsigned len) |
1da177e4 LT |
104 | { |
105 | struct trh_hdr *trh; | |
106 | int hdr_len; | |
107 | ||
9afa0949 YH |
108 | /* |
109 | * Add the 802.2 SNAP header if IP as the IPv4/IPv6 code calls | |
1da177e4 LT |
110 | * dev->hard_header directly. |
111 | */ | |
112 | if (type == ETH_P_IP || type == ETH_P_IPV6 || type == ETH_P_ARP) | |
113 | { | |
114 | struct trllc *trllc; | |
115 | ||
116 | hdr_len = sizeof(struct trh_hdr) + sizeof(struct trllc); | |
117 | trh = (struct trh_hdr *)skb_push(skb, hdr_len); | |
118 | trllc = (struct trllc *)(trh+1); | |
119 | trllc->dsap = trllc->ssap = EXTENDED_SAP; | |
120 | trllc->llc = UI_CMD; | |
121 | trllc->protid[0] = trllc->protid[1] = trllc->protid[2] = 0x00; | |
122 | trllc->ethertype = htons(type); | |
123 | } | |
124 | else | |
125 | { | |
126 | hdr_len = sizeof(struct trh_hdr); | |
9afa0949 | 127 | trh = (struct trh_hdr *)skb_push(skb, hdr_len); |
1da177e4 LT |
128 | } |
129 | ||
130 | trh->ac=AC; | |
131 | trh->fc=LLC_FRAME; | |
132 | ||
133 | if(saddr) | |
134 | memcpy(trh->saddr,saddr,dev->addr_len); | |
135 | else | |
136 | memcpy(trh->saddr,dev->dev_addr,dev->addr_len); | |
137 | ||
138 | /* | |
139 | * Build the destination and then source route the frame | |
140 | */ | |
9afa0949 YH |
141 | |
142 | if(daddr) | |
1da177e4 LT |
143 | { |
144 | memcpy(trh->daddr,daddr,dev->addr_len); | |
145 | tr_source_route(skb,trh,dev); | |
146 | return(hdr_len); | |
147 | } | |
148 | ||
149 | return -hdr_len; | |
150 | } | |
9afa0949 | 151 | |
1da177e4 LT |
152 | /* |
153 | * A neighbour discovery of some species (eg arp) has completed. We | |
154 | * can now send the packet. | |
155 | */ | |
9afa0949 YH |
156 | |
157 | static int tr_rebuild_header(struct sk_buff *skb) | |
1da177e4 LT |
158 | { |
159 | struct trh_hdr *trh=(struct trh_hdr *)skb->data; | |
160 | struct trllc *trllc=(struct trllc *)(skb->data+sizeof(struct trh_hdr)); | |
161 | struct net_device *dev = skb->dev; | |
162 | ||
163 | /* | |
164 | * FIXME: We don't yet support IPv6 over token rings | |
165 | */ | |
9afa0949 | 166 | |
1da177e4 | 167 | if(trllc->ethertype != htons(ETH_P_IP)) { |
0ac0760a | 168 | printk("tr_rebuild_header: Don't know how to resolve type %04X addresses ?\n", ntohs(trllc->ethertype)); |
1da177e4 LT |
169 | return 0; |
170 | } | |
171 | ||
172 | #ifdef CONFIG_INET | |
173 | if(arp_find(trh->daddr, skb)) { | |
174 | return 1; | |
175 | } | |
9afa0949 YH |
176 | else |
177 | #endif | |
178 | { | |
179 | tr_source_route(skb,trh,dev); | |
1da177e4 LT |
180 | return 0; |
181 | } | |
182 | } | |
9afa0949 | 183 | |
1da177e4 LT |
184 | /* |
185 | * Some of this is a bit hackish. We intercept RIF information | |
186 | * used for source routing. We also grab IP directly and don't feed | |
187 | * it via SNAP. | |
188 | */ | |
9afa0949 | 189 | |
0ac0760a | 190 | __be16 tr_type_trans(struct sk_buff *skb, struct net_device *dev) |
1da177e4 LT |
191 | { |
192 | ||
c1a4b86e | 193 | struct trh_hdr *trh; |
1da177e4 LT |
194 | struct trllc *trllc; |
195 | unsigned riflen=0; | |
9afa0949 | 196 | |
c8fb7948 | 197 | skb->dev = dev; |
459a98ed | 198 | skb_reset_mac_header(skb); |
c1a4b86e | 199 | trh = tr_hdr(skb); |
9afa0949 YH |
200 | |
201 | if(trh->saddr[0] & TR_RII) | |
1da177e4 LT |
202 | riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8; |
203 | ||
204 | trllc = (struct trllc *)(skb->data+sizeof(struct trh_hdr)-TR_MAXRIFLEN+riflen); | |
205 | ||
206 | skb_pull(skb,sizeof(struct trh_hdr)-TR_MAXRIFLEN+riflen); | |
207 | ||
9afa0949 | 208 | if(*trh->daddr & 0x80) |
1da177e4 | 209 | { |
9afa0949 | 210 | if(!memcmp(trh->daddr,dev->broadcast,TR_ALEN)) |
1da177e4 LT |
211 | skb->pkt_type=PACKET_BROADCAST; |
212 | else | |
213 | skb->pkt_type=PACKET_MULTICAST; | |
214 | } | |
215 | else if ( (trh->daddr[0] & 0x01) && (trh->daddr[1] & 0x00) && (trh->daddr[2] & 0x5E)) | |
216 | { | |
217 | skb->pkt_type=PACKET_MULTICAST; | |
218 | } | |
9afa0949 | 219 | else if(dev->flags & IFF_PROMISC) |
1da177e4 LT |
220 | { |
221 | if(memcmp(trh->daddr, dev->dev_addr, TR_ALEN)) | |
222 | skb->pkt_type=PACKET_OTHERHOST; | |
223 | } | |
224 | ||
225 | if ((skb->pkt_type != PACKET_BROADCAST) && | |
226 | (skb->pkt_type != PACKET_MULTICAST)) | |
9afa0949 | 227 | tr_add_rif_info(trh,dev) ; |
1da177e4 LT |
228 | |
229 | /* | |
9afa0949 | 230 | * Strip the SNAP header from ARP packets since we don't |
1da177e4 LT |
231 | * pass them through to the 802.2/SNAP layers. |
232 | */ | |
233 | ||
234 | if (trllc->dsap == EXTENDED_SAP && | |
0ac0760a AV |
235 | (trllc->ethertype == htons(ETH_P_IP) || |
236 | trllc->ethertype == htons(ETH_P_IPV6) || | |
237 | trllc->ethertype == htons(ETH_P_ARP))) | |
1da177e4 LT |
238 | { |
239 | skb_pull(skb, sizeof(struct trllc)); | |
240 | return trllc->ethertype; | |
241 | } | |
242 | ||
0ac0760a | 243 | return htons(ETH_P_TR_802_2); |
1da177e4 LT |
244 | } |
245 | ||
246 | /* | |
9afa0949 | 247 | * We try to do source routing... |
1da177e4 LT |
248 | */ |
249 | ||
9afa0949 | 250 | void tr_source_route(struct sk_buff *skb,struct trh_hdr *trh,struct net_device *dev) |
1da177e4 LT |
251 | { |
252 | int slack; | |
253 | unsigned int hash; | |
c8b35d2a | 254 | struct rif_cache *entry; |
1da177e4 | 255 | unsigned char *olddata; |
001dd250 | 256 | unsigned long flags; |
9afa0949 | 257 | static const unsigned char mcast_func_addr[] |
1da177e4 | 258 | = {0xC0,0x00,0x00,0x04,0x00,0x00}; |
9afa0949 | 259 | |
001dd250 | 260 | spin_lock_irqsave(&rif_lock, flags); |
1da177e4 LT |
261 | |
262 | /* | |
9afa0949 | 263 | * Broadcasts are single route as stated in RFC 1042 |
1da177e4 LT |
264 | */ |
265 | if( (!memcmp(&(trh->daddr[0]),&(dev->broadcast[0]),TR_ALEN)) || | |
266 | (!memcmp(&(trh->daddr[0]),&(mcast_func_addr[0]), TR_ALEN)) ) | |
267 | { | |
9afa0949 | 268 | trh->rcf=htons((((sizeof(trh->rcf)) << 8) & TR_RCF_LEN_MASK) |
1da177e4 LT |
269 | | TR_RCF_FRAME2K | TR_RCF_LIMITED_BROADCAST); |
270 | trh->saddr[0]|=TR_RII; | |
271 | } | |
9afa0949 | 272 | else |
1da177e4 LT |
273 | { |
274 | hash = rif_hash(trh->daddr); | |
275 | /* | |
276 | * Walk the hash table and look for an entry | |
277 | */ | |
278 | for(entry=rif_table[hash];entry && memcmp(&(entry->addr[0]),&(trh->daddr[0]),TR_ALEN);entry=entry->next); | |
279 | ||
280 | /* | |
281 | * If we found an entry we can route the frame. | |
282 | */ | |
9afa0949 | 283 | if(entry) |
1da177e4 LT |
284 | { |
285 | #if TR_SR_DEBUG | |
0795af57 JP |
286 | { |
287 | DECLARE_MAC_BUF(mac); | |
288 | printk("source routing for %s\n",print_mac(mac, trh->daddr)); | |
289 | } | |
1da177e4 LT |
290 | #endif |
291 | if(!entry->local_ring && (ntohs(entry->rcf) & TR_RCF_LEN_MASK) >> 8) | |
292 | { | |
293 | trh->rcf=entry->rcf; | |
294 | memcpy(&trh->rseg[0],&entry->rseg[0],8*sizeof(unsigned short)); | |
9afa0949 | 295 | trh->rcf^=htons(TR_RCF_DIR_BIT); |
1da177e4 LT |
296 | trh->rcf&=htons(0x1fff); /* Issam Chehab <ichehab@madge1.demon.co.uk> */ |
297 | ||
298 | trh->saddr[0]|=TR_RII; | |
299 | #if TR_SR_DEBUG | |
300 | printk("entry found with rcf %04x\n", entry->rcf); | |
301 | } | |
302 | else | |
303 | { | |
304 | printk("entry found but without rcf length, local=%02x\n", entry->local_ring); | |
305 | #endif | |
306 | } | |
307 | entry->last_used=jiffies; | |
308 | } | |
9afa0949 | 309 | else |
1da177e4 LT |
310 | { |
311 | /* | |
312 | * Without the information we simply have to shout | |
313 | * on the wire. The replies should rapidly clean this | |
314 | * situation up. | |
315 | */ | |
9afa0949 | 316 | trh->rcf=htons((((sizeof(trh->rcf)) << 8) & TR_RCF_LEN_MASK) |
1da177e4 LT |
317 | | TR_RCF_FRAME2K | TR_RCF_LIMITED_BROADCAST); |
318 | trh->saddr[0]|=TR_RII; | |
319 | #if TR_SR_DEBUG | |
320 | printk("no entry in rif table found - broadcasting frame\n"); | |
321 | #endif | |
322 | } | |
323 | } | |
324 | ||
325 | /* Compress the RIF here so we don't have to do it in the driver(s) */ | |
326 | if (!(trh->saddr[0] & 0x80)) | |
327 | slack = 18; | |
9afa0949 | 328 | else |
1da177e4 LT |
329 | slack = 18 - ((ntohs(trh->rcf) & TR_RCF_LEN_MASK)>>8); |
330 | olddata = skb->data; | |
001dd250 | 331 | spin_unlock_irqrestore(&rif_lock, flags); |
1da177e4 LT |
332 | |
333 | skb_pull(skb, slack); | |
334 | memmove(skb->data, olddata, sizeof(struct trh_hdr) - slack); | |
335 | } | |
336 | ||
337 | /* | |
338 | * We have learned some new RIF information for our source | |
339 | * routing. | |
340 | */ | |
9afa0949 | 341 | |
1da177e4 LT |
342 | static void tr_add_rif_info(struct trh_hdr *trh, struct net_device *dev) |
343 | { | |
344 | unsigned int hash, rii_p = 0; | |
001dd250 | 345 | unsigned long flags; |
c8b35d2a | 346 | struct rif_cache *entry; |
5ac660ee | 347 | unsigned char saddr0; |
1da177e4 | 348 | |
001dd250 | 349 | spin_lock_irqsave(&rif_lock, flags); |
5ac660ee | 350 | saddr0 = trh->saddr[0]; |
9afa0949 | 351 | |
1da177e4 LT |
352 | /* |
353 | * Firstly see if the entry exists | |
354 | */ | |
355 | ||
9afa0949 | 356 | if(trh->saddr[0] & TR_RII) |
1da177e4 LT |
357 | { |
358 | trh->saddr[0]&=0x7f; | |
359 | if (((ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8) > 2) | |
360 | { | |
361 | rii_p = 1; | |
9afa0949 | 362 | } |
1da177e4 LT |
363 | } |
364 | ||
365 | hash = rif_hash(trh->saddr); | |
366 | for(entry=rif_table[hash];entry && memcmp(&(entry->addr[0]),&(trh->saddr[0]),TR_ALEN);entry=entry->next); | |
367 | ||
9afa0949 | 368 | if(entry==NULL) |
1da177e4 LT |
369 | { |
370 | #if TR_SR_DEBUG | |
0795af57 JP |
371 | DECLARE_MAC_BUF(mac); |
372 | printk("adding rif_entry: addr:%s rcf:%04X\n", | |
373 | print_mac(mac, trh->saddr), ntohs(trh->rcf)); | |
1da177e4 LT |
374 | #endif |
375 | /* | |
376 | * Allocate our new entry. A failure to allocate loses | |
377 | * use the information. This is harmless. | |
378 | * | |
379 | * FIXME: We ought to keep some kind of cache size | |
380 | * limiting and adjust the timers to suit. | |
381 | */ | |
c8b35d2a | 382 | entry=kmalloc(sizeof(struct rif_cache),GFP_ATOMIC); |
1da177e4 | 383 | |
9afa0949 | 384 | if(!entry) |
1da177e4 LT |
385 | { |
386 | printk(KERN_DEBUG "tr.c: Couldn't malloc rif cache entry !\n"); | |
001dd250 | 387 | spin_unlock_irqrestore(&rif_lock, flags); |
1da177e4 LT |
388 | return; |
389 | } | |
390 | ||
391 | memcpy(&(entry->addr[0]),&(trh->saddr[0]),TR_ALEN); | |
392 | entry->iface = dev->ifindex; | |
393 | entry->next=rif_table[hash]; | |
394 | entry->last_used=jiffies; | |
395 | rif_table[hash]=entry; | |
396 | ||
397 | if (rii_p) | |
398 | { | |
399 | entry->rcf = trh->rcf & htons((unsigned short)~TR_RCF_BROADCAST_MASK); | |
400 | memcpy(&(entry->rseg[0]),&(trh->rseg[0]),8*sizeof(unsigned short)); | |
401 | entry->local_ring = 0; | |
1da177e4 LT |
402 | } |
403 | else | |
404 | { | |
405 | entry->local_ring = 1; | |
406 | } | |
9afa0949 | 407 | } |
1da177e4 | 408 | else /* Y. Tahara added */ |
9afa0949 | 409 | { |
1da177e4 LT |
410 | /* |
411 | * Update existing entries | |
412 | */ | |
9afa0949 | 413 | if (!entry->local_ring) |
1da177e4 LT |
414 | if (entry->rcf != (trh->rcf & htons((unsigned short)~TR_RCF_BROADCAST_MASK)) && |
415 | !(trh->rcf & htons(TR_RCF_BROADCAST_MASK))) | |
416 | { | |
417 | #if TR_SR_DEBUG | |
0795af57 JP |
418 | { |
419 | DECLARE_MAC_BUF(mac); | |
420 | printk("updating rif_entry: addr:%s rcf:%04X\n", | |
421 | print_mac(mac, trh->saddr), ntohs(trh->rcf)); | |
422 | } | |
1da177e4 LT |
423 | #endif |
424 | entry->rcf = trh->rcf & htons((unsigned short)~TR_RCF_BROADCAST_MASK); | |
9afa0949 YH |
425 | memcpy(&(entry->rseg[0]),&(trh->rseg[0]),8*sizeof(unsigned short)); |
426 | } | |
427 | entry->last_used=jiffies; | |
1da177e4 | 428 | } |
5ac660ee | 429 | trh->saddr[0]=saddr0; /* put the routing indicator back for tcpdump */ |
001dd250 | 430 | spin_unlock_irqrestore(&rif_lock, flags); |
1da177e4 LT |
431 | } |
432 | ||
433 | /* | |
434 | * Scan the cache with a timer and see what we need to throw out. | |
435 | */ | |
436 | ||
9afa0949 | 437 | static void rif_check_expire(unsigned long dummy) |
1da177e4 LT |
438 | { |
439 | int i; | |
001dd250 | 440 | unsigned long flags, next_interval = jiffies + sysctl_tr_rif_timeout/2; |
1da177e4 | 441 | |
001dd250 | 442 | spin_lock_irqsave(&rif_lock, flags); |
9afa0949 | 443 | |
1da177e4 | 444 | for(i =0; i < RIF_TABLE_SIZE; i++) { |
c8b35d2a | 445 | struct rif_cache *entry, **pentry; |
9afa0949 | 446 | |
1da177e4 LT |
447 | pentry = rif_table+i; |
448 | while((entry=*pentry) != NULL) { | |
449 | unsigned long expires | |
450 | = entry->last_used + sysctl_tr_rif_timeout; | |
451 | ||
452 | if (time_before_eq(expires, jiffies)) { | |
453 | *pentry = entry->next; | |
454 | kfree(entry); | |
455 | } else { | |
456 | pentry = &entry->next; | |
457 | ||
458 | if (time_before(expires, next_interval)) | |
459 | next_interval = expires; | |
460 | } | |
461 | } | |
462 | } | |
9afa0949 | 463 | |
001dd250 | 464 | spin_unlock_irqrestore(&rif_lock, flags); |
1da177e4 LT |
465 | |
466 | mod_timer(&rif_timer, next_interval); | |
467 | ||
468 | } | |
469 | ||
470 | /* | |
471 | * Generate the /proc/net information for the token ring RIF | |
472 | * routing. | |
473 | */ | |
9afa0949 | 474 | |
1da177e4 LT |
475 | #ifdef CONFIG_PROC_FS |
476 | ||
c8b35d2a | 477 | static struct rif_cache *rif_get_idx(loff_t pos) |
1da177e4 LT |
478 | { |
479 | int i; | |
c8b35d2a | 480 | struct rif_cache *entry; |
1da177e4 LT |
481 | loff_t off = 0; |
482 | ||
9afa0949 | 483 | for(i = 0; i < RIF_TABLE_SIZE; i++) |
1da177e4 LT |
484 | for(entry = rif_table[i]; entry; entry = entry->next) { |
485 | if (off == pos) | |
486 | return entry; | |
487 | ++off; | |
488 | } | |
489 | ||
490 | return NULL; | |
491 | } | |
492 | ||
493 | static void *rif_seq_start(struct seq_file *seq, loff_t *pos) | |
494 | { | |
001dd250 | 495 | spin_lock_irq(&rif_lock); |
1da177e4 LT |
496 | |
497 | return *pos ? rif_get_idx(*pos - 1) : SEQ_START_TOKEN; | |
498 | } | |
499 | ||
500 | static void *rif_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
501 | { | |
502 | int i; | |
c8b35d2a | 503 | struct rif_cache *ent = v; |
1da177e4 LT |
504 | |
505 | ++*pos; | |
506 | ||
507 | if (v == SEQ_START_TOKEN) { | |
508 | i = -1; | |
509 | goto scan; | |
510 | } | |
511 | ||
9afa0949 | 512 | if (ent->next) |
1da177e4 LT |
513 | return ent->next; |
514 | ||
515 | i = rif_hash(ent->addr); | |
516 | scan: | |
517 | while (++i < RIF_TABLE_SIZE) { | |
518 | if ((ent = rif_table[i]) != NULL) | |
519 | return ent; | |
520 | } | |
521 | return NULL; | |
522 | } | |
523 | ||
524 | static void rif_seq_stop(struct seq_file *seq, void *v) | |
525 | { | |
001dd250 | 526 | spin_unlock_irq(&rif_lock); |
1da177e4 LT |
527 | } |
528 | ||
529 | static int rif_seq_show(struct seq_file *seq, void *v) | |
530 | { | |
531 | int j, rcf_len, segment, brdgnmb; | |
c8b35d2a | 532 | struct rif_cache *entry = v; |
0795af57 | 533 | DECLARE_MAC_BUF(mac); |
1da177e4 LT |
534 | |
535 | if (v == SEQ_START_TOKEN) | |
536 | seq_puts(seq, | |
537 | "if TR address TTL rcf routing segments\n"); | |
538 | else { | |
881d966b | 539 | struct net_device *dev = dev_get_by_index(&init_net, entry->iface); |
1da177e4 LT |
540 | long ttl = (long) (entry->last_used + sysctl_tr_rif_timeout) |
541 | - (long) jiffies; | |
542 | ||
0795af57 | 543 | seq_printf(seq, "%s %s %7li ", |
1da177e4 | 544 | dev?dev->name:"?", |
0795af57 | 545 | print_mac(mac, entry->addr), |
1da177e4 LT |
546 | ttl/HZ); |
547 | ||
548 | if (entry->local_ring) | |
9afa0949 | 549 | seq_puts(seq, "local\n"); |
1da177e4 LT |
550 | else { |
551 | ||
552 | seq_printf(seq, "%04X", ntohs(entry->rcf)); | |
9afa0949 | 553 | rcf_len = ((ntohs(entry->rcf) & TR_RCF_LEN_MASK)>>8)-2; |
1da177e4 | 554 | if (rcf_len) |
9afa0949 | 555 | rcf_len >>= 1; |
1da177e4 LT |
556 | for(j = 1; j < rcf_len; j++) { |
557 | if(j==1) { | |
558 | segment=ntohs(entry->rseg[j-1])>>4; | |
559 | seq_printf(seq," %03X",segment); | |
3ff50b79 SH |
560 | } |
561 | ||
1da177e4 LT |
562 | segment=ntohs(entry->rseg[j])>>4; |
563 | brdgnmb=ntohs(entry->rseg[j-1])&0x00f; | |
564 | seq_printf(seq,"-%01X-%03X",brdgnmb,segment); | |
565 | } | |
566 | seq_putc(seq, '\n'); | |
567 | } | |
9afa0949 | 568 | } |
1da177e4 LT |
569 | return 0; |
570 | } | |
571 | ||
572 | ||
56b3d975 | 573 | static const struct seq_operations rif_seq_ops = { |
1da177e4 LT |
574 | .start = rif_seq_start, |
575 | .next = rif_seq_next, | |
576 | .stop = rif_seq_stop, | |
577 | .show = rif_seq_show, | |
578 | }; | |
579 | ||
580 | static int rif_seq_open(struct inode *inode, struct file *file) | |
581 | { | |
582 | return seq_open(file, &rif_seq_ops); | |
583 | } | |
584 | ||
9a32144e | 585 | static const struct file_operations rif_seq_fops = { |
1da177e4 LT |
586 | .owner = THIS_MODULE, |
587 | .open = rif_seq_open, | |
588 | .read = seq_read, | |
589 | .llseek = seq_lseek, | |
590 | .release = seq_release, | |
591 | }; | |
592 | ||
593 | #endif | |
594 | ||
595 | static void tr_setup(struct net_device *dev) | |
596 | { | |
597 | /* | |
598 | * Configure and register | |
599 | */ | |
9afa0949 | 600 | |
1da177e4 LT |
601 | dev->hard_header = tr_header; |
602 | dev->rebuild_header = tr_rebuild_header; | |
603 | ||
604 | dev->type = ARPHRD_IEEE802_TR; | |
605 | dev->hard_header_len = TR_HLEN; | |
606 | dev->mtu = 2000; | |
607 | dev->addr_len = TR_ALEN; | |
608 | dev->tx_queue_len = 100; /* Long queues on tr */ | |
9afa0949 | 609 | |
1da177e4 LT |
610 | memset(dev->broadcast,0xFF, TR_ALEN); |
611 | ||
612 | /* New-style flags. */ | |
613 | dev->flags = IFF_BROADCAST | IFF_MULTICAST ; | |
614 | } | |
615 | ||
616 | /** | |
617 | * alloc_trdev - Register token ring device | |
618 | * @sizeof_priv: Size of additional driver-private structure to be allocated | |
619 | * for this token ring device | |
620 | * | |
621 | * Fill in the fields of the device structure with token ring-generic values. | |
622 | * | |
623 | * Constructs a new net device, complete with a private data area of | |
624 | * size @sizeof_priv. A 32-byte (not bit) alignment is enforced for | |
625 | * this private data area. | |
626 | */ | |
627 | struct net_device *alloc_trdev(int sizeof_priv) | |
628 | { | |
629 | return alloc_netdev(sizeof_priv, "tr%d", tr_setup); | |
630 | } | |
631 | ||
632 | /* | |
633 | * Called during bootup. We don't actually have to initialise | |
634 | * too much for this. | |
635 | */ | |
636 | ||
637 | static int __init rif_init(void) | |
638 | { | |
639 | init_timer(&rif_timer); | |
640 | rif_timer.expires = sysctl_tr_rif_timeout; | |
641 | rif_timer.data = 0L; | |
642 | rif_timer.function = rif_check_expire; | |
643 | add_timer(&rif_timer); | |
644 | ||
457c4cbc | 645 | proc_net_fops_create(&init_net, "tr_rif", S_IRUGO, &rif_seq_fops); |
1da177e4 LT |
646 | return 0; |
647 | } | |
648 | ||
649 | module_init(rif_init); | |
650 | ||
1da177e4 LT |
651 | EXPORT_SYMBOL(tr_type_trans); |
652 | EXPORT_SYMBOL(alloc_trdev); |