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Commit | Line | Data |
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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> | |
36f0bebd | 38 | #include <linux/sysctl.h> |
1da177e4 | 39 | #include <net/arp.h> |
457c4cbc | 40 | #include <net/net_namespace.h> |
1da177e4 LT |
41 | |
42 | static void tr_add_rif_info(struct trh_hdr *trh, struct net_device *dev); | |
43 | static void rif_check_expire(unsigned long dummy); | |
44 | ||
45 | #define TR_SR_DEBUG 0 | |
46 | ||
47 | /* | |
48 | * Each RIF entry we learn is kept this way | |
49 | */ | |
9afa0949 | 50 | |
c8b35d2a | 51 | struct rif_cache { |
1da177e4 LT |
52 | unsigned char addr[TR_ALEN]; |
53 | int iface; | |
c6b33653 AD |
54 | __be16 rcf; |
55 | __be16 rseg[8]; | |
c8b35d2a | 56 | struct rif_cache *next; |
1da177e4 LT |
57 | unsigned long last_used; |
58 | unsigned char local_ring; | |
59 | }; | |
60 | ||
61 | #define RIF_TABLE_SIZE 32 | |
62 | ||
63 | /* | |
64 | * We hash the RIF cache 32 ways. We do after all have to look it | |
65 | * up a lot. | |
66 | */ | |
9afa0949 | 67 | |
c8b35d2a | 68 | static struct rif_cache *rif_table[RIF_TABLE_SIZE]; |
1da177e4 LT |
69 | |
70 | static DEFINE_SPINLOCK(rif_lock); | |
71 | ||
72 | ||
73 | /* | |
74 | * Garbage disposal timer. | |
75 | */ | |
9afa0949 | 76 | |
1da177e4 LT |
77 | static struct timer_list rif_timer; |
78 | ||
81a21eb4 | 79 | static int sysctl_tr_rif_timeout = 60*10*HZ; |
1da177e4 LT |
80 | |
81 | static inline unsigned long rif_hash(const unsigned char *addr) | |
82 | { | |
83 | unsigned long x; | |
84 | ||
85 | x = addr[0]; | |
86 | x = (x << 2) ^ addr[1]; | |
87 | x = (x << 2) ^ addr[2]; | |
88 | x = (x << 2) ^ addr[3]; | |
89 | x = (x << 2) ^ addr[4]; | |
90 | x = (x << 2) ^ addr[5]; | |
91 | ||
92 | x ^= x >> 8; | |
93 | ||
94 | return x & (RIF_TABLE_SIZE - 1); | |
95 | } | |
96 | ||
97 | /* | |
98 | * Put the headers on a token ring packet. Token ring source routing | |
99 | * makes this a little more exciting than on ethernet. | |
100 | */ | |
9afa0949 | 101 | |
1da177e4 LT |
102 | static int tr_header(struct sk_buff *skb, struct net_device *dev, |
103 | unsigned short type, | |
3b04ddde | 104 | const void *daddr, const void *saddr, unsigned len) |
1da177e4 LT |
105 | { |
106 | struct trh_hdr *trh; | |
107 | int hdr_len; | |
108 | ||
9afa0949 YH |
109 | /* |
110 | * Add the 802.2 SNAP header if IP as the IPv4/IPv6 code calls | |
1da177e4 LT |
111 | * dev->hard_header directly. |
112 | */ | |
113 | if (type == ETH_P_IP || type == ETH_P_IPV6 || type == ETH_P_ARP) | |
114 | { | |
115 | struct trllc *trllc; | |
116 | ||
117 | hdr_len = sizeof(struct trh_hdr) + sizeof(struct trllc); | |
118 | trh = (struct trh_hdr *)skb_push(skb, hdr_len); | |
119 | trllc = (struct trllc *)(trh+1); | |
120 | trllc->dsap = trllc->ssap = EXTENDED_SAP; | |
121 | trllc->llc = UI_CMD; | |
122 | trllc->protid[0] = trllc->protid[1] = trllc->protid[2] = 0x00; | |
123 | trllc->ethertype = htons(type); | |
124 | } | |
125 | else | |
126 | { | |
127 | hdr_len = sizeof(struct trh_hdr); | |
9afa0949 | 128 | trh = (struct trh_hdr *)skb_push(skb, hdr_len); |
1da177e4 LT |
129 | } |
130 | ||
131 | trh->ac=AC; | |
132 | trh->fc=LLC_FRAME; | |
133 | ||
134 | if(saddr) | |
135 | memcpy(trh->saddr,saddr,dev->addr_len); | |
136 | else | |
137 | memcpy(trh->saddr,dev->dev_addr,dev->addr_len); | |
138 | ||
139 | /* | |
140 | * Build the destination and then source route the frame | |
141 | */ | |
9afa0949 YH |
142 | |
143 | if(daddr) | |
1da177e4 LT |
144 | { |
145 | memcpy(trh->daddr,daddr,dev->addr_len); | |
3b04ddde | 146 | tr_source_route(skb, trh, dev); |
1da177e4 LT |
147 | return(hdr_len); |
148 | } | |
149 | ||
150 | return -hdr_len; | |
151 | } | |
9afa0949 | 152 | |
1da177e4 LT |
153 | /* |
154 | * A neighbour discovery of some species (eg arp) has completed. We | |
155 | * can now send the packet. | |
156 | */ | |
9afa0949 YH |
157 | |
158 | static int tr_rebuild_header(struct sk_buff *skb) | |
1da177e4 LT |
159 | { |
160 | struct trh_hdr *trh=(struct trh_hdr *)skb->data; | |
161 | struct trllc *trllc=(struct trllc *)(skb->data+sizeof(struct trh_hdr)); | |
162 | struct net_device *dev = skb->dev; | |
163 | ||
164 | /* | |
165 | * FIXME: We don't yet support IPv6 over token rings | |
166 | */ | |
9afa0949 | 167 | |
1da177e4 | 168 | if(trllc->ethertype != htons(ETH_P_IP)) { |
0ac0760a | 169 | printk("tr_rebuild_header: Don't know how to resolve type %04X addresses ?\n", ntohs(trllc->ethertype)); |
1da177e4 LT |
170 | return 0; |
171 | } | |
172 | ||
173 | #ifdef CONFIG_INET | |
174 | if(arp_find(trh->daddr, skb)) { | |
175 | return 1; | |
176 | } | |
9afa0949 YH |
177 | else |
178 | #endif | |
179 | { | |
180 | tr_source_route(skb,trh,dev); | |
1da177e4 LT |
181 | return 0; |
182 | } | |
183 | } | |
9afa0949 | 184 | |
1da177e4 LT |
185 | /* |
186 | * Some of this is a bit hackish. We intercept RIF information | |
187 | * used for source routing. We also grab IP directly and don't feed | |
188 | * it via SNAP. | |
189 | */ | |
9afa0949 | 190 | |
0ac0760a | 191 | __be16 tr_type_trans(struct sk_buff *skb, struct net_device *dev) |
1da177e4 LT |
192 | { |
193 | ||
c1a4b86e | 194 | struct trh_hdr *trh; |
1da177e4 LT |
195 | struct trllc *trllc; |
196 | unsigned riflen=0; | |
9afa0949 | 197 | |
c8fb7948 | 198 | skb->dev = dev; |
459a98ed | 199 | skb_reset_mac_header(skb); |
c1a4b86e | 200 | trh = tr_hdr(skb); |
9afa0949 YH |
201 | |
202 | if(trh->saddr[0] & TR_RII) | |
1da177e4 LT |
203 | riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8; |
204 | ||
205 | trllc = (struct trllc *)(skb->data+sizeof(struct trh_hdr)-TR_MAXRIFLEN+riflen); | |
206 | ||
207 | skb_pull(skb,sizeof(struct trh_hdr)-TR_MAXRIFLEN+riflen); | |
208 | ||
9afa0949 | 209 | if(*trh->daddr & 0x80) |
1da177e4 | 210 | { |
9afa0949 | 211 | if(!memcmp(trh->daddr,dev->broadcast,TR_ALEN)) |
1da177e4 LT |
212 | skb->pkt_type=PACKET_BROADCAST; |
213 | else | |
214 | skb->pkt_type=PACKET_MULTICAST; | |
215 | } | |
216 | else if ( (trh->daddr[0] & 0x01) && (trh->daddr[1] & 0x00) && (trh->daddr[2] & 0x5E)) | |
217 | { | |
218 | skb->pkt_type=PACKET_MULTICAST; | |
219 | } | |
9afa0949 | 220 | else if(dev->flags & IFF_PROMISC) |
1da177e4 LT |
221 | { |
222 | if(memcmp(trh->daddr, dev->dev_addr, TR_ALEN)) | |
223 | skb->pkt_type=PACKET_OTHERHOST; | |
224 | } | |
225 | ||
226 | if ((skb->pkt_type != PACKET_BROADCAST) && | |
227 | (skb->pkt_type != PACKET_MULTICAST)) | |
9afa0949 | 228 | tr_add_rif_info(trh,dev) ; |
1da177e4 LT |
229 | |
230 | /* | |
9afa0949 | 231 | * Strip the SNAP header from ARP packets since we don't |
1da177e4 LT |
232 | * pass them through to the 802.2/SNAP layers. |
233 | */ | |
234 | ||
235 | if (trllc->dsap == EXTENDED_SAP && | |
0ac0760a AV |
236 | (trllc->ethertype == htons(ETH_P_IP) || |
237 | trllc->ethertype == htons(ETH_P_IPV6) || | |
238 | trllc->ethertype == htons(ETH_P_ARP))) | |
1da177e4 LT |
239 | { |
240 | skb_pull(skb, sizeof(struct trllc)); | |
241 | return trllc->ethertype; | |
242 | } | |
243 | ||
0ac0760a | 244 | return htons(ETH_P_TR_802_2); |
1da177e4 LT |
245 | } |
246 | ||
247 | /* | |
9afa0949 | 248 | * We try to do source routing... |
1da177e4 LT |
249 | */ |
250 | ||
3b04ddde SH |
251 | void tr_source_route(struct sk_buff *skb,struct trh_hdr *trh, |
252 | struct net_device *dev) | |
1da177e4 LT |
253 | { |
254 | int slack; | |
255 | unsigned int hash; | |
c8b35d2a | 256 | struct rif_cache *entry; |
1da177e4 | 257 | unsigned char *olddata; |
001dd250 | 258 | unsigned long flags; |
9afa0949 | 259 | static const unsigned char mcast_func_addr[] |
1da177e4 | 260 | = {0xC0,0x00,0x00,0x04,0x00,0x00}; |
9afa0949 | 261 | |
001dd250 | 262 | spin_lock_irqsave(&rif_lock, flags); |
1da177e4 LT |
263 | |
264 | /* | |
9afa0949 | 265 | * Broadcasts are single route as stated in RFC 1042 |
1da177e4 LT |
266 | */ |
267 | if( (!memcmp(&(trh->daddr[0]),&(dev->broadcast[0]),TR_ALEN)) || | |
268 | (!memcmp(&(trh->daddr[0]),&(mcast_func_addr[0]), TR_ALEN)) ) | |
269 | { | |
9afa0949 | 270 | trh->rcf=htons((((sizeof(trh->rcf)) << 8) & TR_RCF_LEN_MASK) |
1da177e4 LT |
271 | | TR_RCF_FRAME2K | TR_RCF_LIMITED_BROADCAST); |
272 | trh->saddr[0]|=TR_RII; | |
273 | } | |
9afa0949 | 274 | else |
1da177e4 LT |
275 | { |
276 | hash = rif_hash(trh->daddr); | |
277 | /* | |
278 | * Walk the hash table and look for an entry | |
279 | */ | |
280 | for(entry=rif_table[hash];entry && memcmp(&(entry->addr[0]),&(trh->daddr[0]),TR_ALEN);entry=entry->next); | |
281 | ||
282 | /* | |
283 | * If we found an entry we can route the frame. | |
284 | */ | |
9afa0949 | 285 | if(entry) |
1da177e4 LT |
286 | { |
287 | #if TR_SR_DEBUG | |
e174961c | 288 | printk("source routing for %pM\n", trh->daddr); |
1da177e4 LT |
289 | #endif |
290 | if(!entry->local_ring && (ntohs(entry->rcf) & TR_RCF_LEN_MASK) >> 8) | |
291 | { | |
292 | trh->rcf=entry->rcf; | |
293 | memcpy(&trh->rseg[0],&entry->rseg[0],8*sizeof(unsigned short)); | |
9afa0949 | 294 | trh->rcf^=htons(TR_RCF_DIR_BIT); |
1da177e4 LT |
295 | trh->rcf&=htons(0x1fff); /* Issam Chehab <ichehab@madge1.demon.co.uk> */ |
296 | ||
297 | trh->saddr[0]|=TR_RII; | |
298 | #if TR_SR_DEBUG | |
299 | printk("entry found with rcf %04x\n", entry->rcf); | |
300 | } | |
301 | else | |
302 | { | |
303 | printk("entry found but without rcf length, local=%02x\n", entry->local_ring); | |
304 | #endif | |
305 | } | |
306 | entry->last_used=jiffies; | |
307 | } | |
9afa0949 | 308 | else |
1da177e4 LT |
309 | { |
310 | /* | |
311 | * Without the information we simply have to shout | |
312 | * on the wire. The replies should rapidly clean this | |
313 | * situation up. | |
314 | */ | |
9afa0949 | 315 | trh->rcf=htons((((sizeof(trh->rcf)) << 8) & TR_RCF_LEN_MASK) |
1da177e4 LT |
316 | | TR_RCF_FRAME2K | TR_RCF_LIMITED_BROADCAST); |
317 | trh->saddr[0]|=TR_RII; | |
318 | #if TR_SR_DEBUG | |
319 | printk("no entry in rif table found - broadcasting frame\n"); | |
320 | #endif | |
321 | } | |
322 | } | |
323 | ||
324 | /* Compress the RIF here so we don't have to do it in the driver(s) */ | |
325 | if (!(trh->saddr[0] & 0x80)) | |
326 | slack = 18; | |
9afa0949 | 327 | else |
1da177e4 LT |
328 | slack = 18 - ((ntohs(trh->rcf) & TR_RCF_LEN_MASK)>>8); |
329 | olddata = skb->data; | |
001dd250 | 330 | spin_unlock_irqrestore(&rif_lock, flags); |
1da177e4 LT |
331 | |
332 | skb_pull(skb, slack); | |
333 | memmove(skb->data, olddata, sizeof(struct trh_hdr) - slack); | |
334 | } | |
335 | ||
336 | /* | |
337 | * We have learned some new RIF information for our source | |
338 | * routing. | |
339 | */ | |
9afa0949 | 340 | |
1da177e4 LT |
341 | static void tr_add_rif_info(struct trh_hdr *trh, struct net_device *dev) |
342 | { | |
343 | unsigned int hash, rii_p = 0; | |
001dd250 | 344 | unsigned long flags; |
c8b35d2a | 345 | struct rif_cache *entry; |
5ac660ee | 346 | unsigned char saddr0; |
1da177e4 | 347 | |
001dd250 | 348 | spin_lock_irqsave(&rif_lock, flags); |
5ac660ee | 349 | saddr0 = trh->saddr[0]; |
9afa0949 | 350 | |
1da177e4 LT |
351 | /* |
352 | * Firstly see if the entry exists | |
353 | */ | |
354 | ||
9afa0949 | 355 | if(trh->saddr[0] & TR_RII) |
1da177e4 LT |
356 | { |
357 | trh->saddr[0]&=0x7f; | |
358 | if (((ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8) > 2) | |
359 | { | |
360 | rii_p = 1; | |
9afa0949 | 361 | } |
1da177e4 LT |
362 | } |
363 | ||
364 | hash = rif_hash(trh->saddr); | |
365 | for(entry=rif_table[hash];entry && memcmp(&(entry->addr[0]),&(trh->saddr[0]),TR_ALEN);entry=entry->next); | |
366 | ||
9afa0949 | 367 | if(entry==NULL) |
1da177e4 LT |
368 | { |
369 | #if TR_SR_DEBUG | |
e174961c JB |
370 | printk("adding rif_entry: addr:%pM rcf:%04X\n", |
371 | trh->saddr, ntohs(trh->rcf)); | |
1da177e4 LT |
372 | #endif |
373 | /* | |
374 | * Allocate our new entry. A failure to allocate loses | |
375 | * use the information. This is harmless. | |
376 | * | |
377 | * FIXME: We ought to keep some kind of cache size | |
378 | * limiting and adjust the timers to suit. | |
379 | */ | |
c8b35d2a | 380 | entry=kmalloc(sizeof(struct rif_cache),GFP_ATOMIC); |
1da177e4 | 381 | |
9afa0949 | 382 | if(!entry) |
1da177e4 LT |
383 | { |
384 | printk(KERN_DEBUG "tr.c: Couldn't malloc rif cache entry !\n"); | |
001dd250 | 385 | spin_unlock_irqrestore(&rif_lock, flags); |
1da177e4 LT |
386 | return; |
387 | } | |
388 | ||
389 | memcpy(&(entry->addr[0]),&(trh->saddr[0]),TR_ALEN); | |
390 | entry->iface = dev->ifindex; | |
391 | entry->next=rif_table[hash]; | |
392 | entry->last_used=jiffies; | |
393 | rif_table[hash]=entry; | |
394 | ||
395 | if (rii_p) | |
396 | { | |
397 | entry->rcf = trh->rcf & htons((unsigned short)~TR_RCF_BROADCAST_MASK); | |
398 | memcpy(&(entry->rseg[0]),&(trh->rseg[0]),8*sizeof(unsigned short)); | |
399 | entry->local_ring = 0; | |
1da177e4 LT |
400 | } |
401 | else | |
402 | { | |
403 | entry->local_ring = 1; | |
404 | } | |
9afa0949 | 405 | } |
1da177e4 | 406 | else /* Y. Tahara added */ |
9afa0949 | 407 | { |
1da177e4 LT |
408 | /* |
409 | * Update existing entries | |
410 | */ | |
9afa0949 | 411 | if (!entry->local_ring) |
1da177e4 LT |
412 | if (entry->rcf != (trh->rcf & htons((unsigned short)~TR_RCF_BROADCAST_MASK)) && |
413 | !(trh->rcf & htons(TR_RCF_BROADCAST_MASK))) | |
414 | { | |
415 | #if TR_SR_DEBUG | |
e174961c JB |
416 | printk("updating rif_entry: addr:%pM rcf:%04X\n", |
417 | trh->saddr, ntohs(trh->rcf)); | |
1da177e4 LT |
418 | #endif |
419 | entry->rcf = trh->rcf & htons((unsigned short)~TR_RCF_BROADCAST_MASK); | |
9afa0949 YH |
420 | memcpy(&(entry->rseg[0]),&(trh->rseg[0]),8*sizeof(unsigned short)); |
421 | } | |
422 | entry->last_used=jiffies; | |
1da177e4 | 423 | } |
5ac660ee | 424 | trh->saddr[0]=saddr0; /* put the routing indicator back for tcpdump */ |
001dd250 | 425 | spin_unlock_irqrestore(&rif_lock, flags); |
1da177e4 LT |
426 | } |
427 | ||
428 | /* | |
429 | * Scan the cache with a timer and see what we need to throw out. | |
430 | */ | |
431 | ||
9afa0949 | 432 | static void rif_check_expire(unsigned long dummy) |
1da177e4 LT |
433 | { |
434 | int i; | |
001dd250 | 435 | unsigned long flags, next_interval = jiffies + sysctl_tr_rif_timeout/2; |
1da177e4 | 436 | |
001dd250 | 437 | spin_lock_irqsave(&rif_lock, flags); |
9afa0949 | 438 | |
1da177e4 | 439 | for(i =0; i < RIF_TABLE_SIZE; i++) { |
c8b35d2a | 440 | struct rif_cache *entry, **pentry; |
9afa0949 | 441 | |
1da177e4 LT |
442 | pentry = rif_table+i; |
443 | while((entry=*pentry) != NULL) { | |
444 | unsigned long expires | |
445 | = entry->last_used + sysctl_tr_rif_timeout; | |
446 | ||
447 | if (time_before_eq(expires, jiffies)) { | |
448 | *pentry = entry->next; | |
449 | kfree(entry); | |
450 | } else { | |
451 | pentry = &entry->next; | |
452 | ||
453 | if (time_before(expires, next_interval)) | |
454 | next_interval = expires; | |
455 | } | |
456 | } | |
457 | } | |
9afa0949 | 458 | |
001dd250 | 459 | spin_unlock_irqrestore(&rif_lock, flags); |
1da177e4 LT |
460 | |
461 | mod_timer(&rif_timer, next_interval); | |
462 | ||
463 | } | |
464 | ||
465 | /* | |
466 | * Generate the /proc/net information for the token ring RIF | |
467 | * routing. | |
468 | */ | |
9afa0949 | 469 | |
1da177e4 LT |
470 | #ifdef CONFIG_PROC_FS |
471 | ||
c8b35d2a | 472 | static struct rif_cache *rif_get_idx(loff_t pos) |
1da177e4 LT |
473 | { |
474 | int i; | |
c8b35d2a | 475 | struct rif_cache *entry; |
1da177e4 LT |
476 | loff_t off = 0; |
477 | ||
9afa0949 | 478 | for(i = 0; i < RIF_TABLE_SIZE; i++) |
1da177e4 LT |
479 | for(entry = rif_table[i]; entry; entry = entry->next) { |
480 | if (off == pos) | |
481 | return entry; | |
482 | ++off; | |
483 | } | |
484 | ||
485 | return NULL; | |
486 | } | |
487 | ||
488 | static void *rif_seq_start(struct seq_file *seq, loff_t *pos) | |
81c55329 | 489 | __acquires(&rif_lock) |
1da177e4 | 490 | { |
001dd250 | 491 | spin_lock_irq(&rif_lock); |
1da177e4 LT |
492 | |
493 | return *pos ? rif_get_idx(*pos - 1) : SEQ_START_TOKEN; | |
494 | } | |
495 | ||
496 | static void *rif_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
497 | { | |
498 | int i; | |
c8b35d2a | 499 | struct rif_cache *ent = v; |
1da177e4 LT |
500 | |
501 | ++*pos; | |
502 | ||
503 | if (v == SEQ_START_TOKEN) { | |
504 | i = -1; | |
505 | goto scan; | |
506 | } | |
507 | ||
9afa0949 | 508 | if (ent->next) |
1da177e4 LT |
509 | return ent->next; |
510 | ||
511 | i = rif_hash(ent->addr); | |
512 | scan: | |
513 | while (++i < RIF_TABLE_SIZE) { | |
514 | if ((ent = rif_table[i]) != NULL) | |
515 | return ent; | |
516 | } | |
517 | return NULL; | |
518 | } | |
519 | ||
520 | static void rif_seq_stop(struct seq_file *seq, void *v) | |
81c55329 | 521 | __releases(&rif_lock) |
1da177e4 | 522 | { |
001dd250 | 523 | spin_unlock_irq(&rif_lock); |
1da177e4 LT |
524 | } |
525 | ||
526 | static int rif_seq_show(struct seq_file *seq, void *v) | |
527 | { | |
528 | int j, rcf_len, segment, brdgnmb; | |
c8b35d2a | 529 | struct rif_cache *entry = v; |
1da177e4 LT |
530 | |
531 | if (v == SEQ_START_TOKEN) | |
532 | seq_puts(seq, | |
533 | "if TR address TTL rcf routing segments\n"); | |
534 | else { | |
881d966b | 535 | struct net_device *dev = dev_get_by_index(&init_net, entry->iface); |
1da177e4 LT |
536 | long ttl = (long) (entry->last_used + sysctl_tr_rif_timeout) |
537 | - (long) jiffies; | |
538 | ||
e174961c | 539 | seq_printf(seq, "%s %pM %7li ", |
1da177e4 | 540 | dev?dev->name:"?", |
e174961c | 541 | entry->addr, |
1da177e4 LT |
542 | ttl/HZ); |
543 | ||
544 | if (entry->local_ring) | |
9afa0949 | 545 | seq_puts(seq, "local\n"); |
1da177e4 LT |
546 | else { |
547 | ||
548 | seq_printf(seq, "%04X", ntohs(entry->rcf)); | |
9afa0949 | 549 | rcf_len = ((ntohs(entry->rcf) & TR_RCF_LEN_MASK)>>8)-2; |
1da177e4 | 550 | if (rcf_len) |
9afa0949 | 551 | rcf_len >>= 1; |
1da177e4 LT |
552 | for(j = 1; j < rcf_len; j++) { |
553 | if(j==1) { | |
554 | segment=ntohs(entry->rseg[j-1])>>4; | |
555 | seq_printf(seq," %03X",segment); | |
3ff50b79 SH |
556 | } |
557 | ||
1da177e4 LT |
558 | segment=ntohs(entry->rseg[j])>>4; |
559 | brdgnmb=ntohs(entry->rseg[j-1])&0x00f; | |
560 | seq_printf(seq,"-%01X-%03X",brdgnmb,segment); | |
561 | } | |
562 | seq_putc(seq, '\n'); | |
563 | } | |
3384901f WY |
564 | |
565 | if (dev) | |
566 | dev_put(dev); | |
9afa0949 | 567 | } |
1da177e4 LT |
568 | return 0; |
569 | } | |
570 | ||
571 | ||
56b3d975 | 572 | static const struct seq_operations rif_seq_ops = { |
1da177e4 LT |
573 | .start = rif_seq_start, |
574 | .next = rif_seq_next, | |
575 | .stop = rif_seq_stop, | |
576 | .show = rif_seq_show, | |
577 | }; | |
578 | ||
579 | static int rif_seq_open(struct inode *inode, struct file *file) | |
580 | { | |
581 | return seq_open(file, &rif_seq_ops); | |
582 | } | |
583 | ||
9a32144e | 584 | static const struct file_operations rif_seq_fops = { |
1da177e4 LT |
585 | .owner = THIS_MODULE, |
586 | .open = rif_seq_open, | |
587 | .read = seq_read, | |
588 | .llseek = seq_lseek, | |
589 | .release = seq_release, | |
590 | }; | |
591 | ||
592 | #endif | |
593 | ||
3b04ddde SH |
594 | static const struct header_ops tr_header_ops = { |
595 | .create = tr_header, | |
596 | .rebuild= tr_rebuild_header, | |
597 | }; | |
598 | ||
1da177e4 LT |
599 | static void tr_setup(struct net_device *dev) |
600 | { | |
601 | /* | |
602 | * Configure and register | |
603 | */ | |
9afa0949 | 604 | |
3b04ddde | 605 | dev->header_ops = &tr_header_ops; |
1da177e4 LT |
606 | |
607 | dev->type = ARPHRD_IEEE802_TR; | |
608 | dev->hard_header_len = TR_HLEN; | |
609 | dev->mtu = 2000; | |
610 | dev->addr_len = TR_ALEN; | |
611 | dev->tx_queue_len = 100; /* Long queues on tr */ | |
9afa0949 | 612 | |
1da177e4 LT |
613 | memset(dev->broadcast,0xFF, TR_ALEN); |
614 | ||
615 | /* New-style flags. */ | |
616 | dev->flags = IFF_BROADCAST | IFF_MULTICAST ; | |
617 | } | |
618 | ||
619 | /** | |
620 | * alloc_trdev - Register token ring device | |
621 | * @sizeof_priv: Size of additional driver-private structure to be allocated | |
622 | * for this token ring device | |
623 | * | |
624 | * Fill in the fields of the device structure with token ring-generic values. | |
625 | * | |
626 | * Constructs a new net device, complete with a private data area of | |
627 | * size @sizeof_priv. A 32-byte (not bit) alignment is enforced for | |
628 | * this private data area. | |
629 | */ | |
630 | struct net_device *alloc_trdev(int sizeof_priv) | |
631 | { | |
632 | return alloc_netdev(sizeof_priv, "tr%d", tr_setup); | |
633 | } | |
634 | ||
36f0bebd PE |
635 | #ifdef CONFIG_SYSCTL |
636 | static struct ctl_table tr_table[] = { | |
637 | { | |
638 | .ctl_name = NET_TR_RIF_TIMEOUT, | |
639 | .procname = "rif_timeout", | |
640 | .data = &sysctl_tr_rif_timeout, | |
641 | .maxlen = sizeof(int), | |
642 | .mode = 0644, | |
6d9f239a | 643 | .proc_handler = proc_dointvec |
36f0bebd PE |
644 | }, |
645 | { 0 }, | |
646 | }; | |
647 | ||
648 | static __initdata struct ctl_path tr_path[] = { | |
649 | { .procname = "net", .ctl_name = CTL_NET, }, | |
650 | { .procname = "token-ring", .ctl_name = NET_TR, }, | |
651 | { } | |
652 | }; | |
653 | #endif | |
654 | ||
1da177e4 LT |
655 | /* |
656 | * Called during bootup. We don't actually have to initialise | |
657 | * too much for this. | |
658 | */ | |
659 | ||
660 | static int __init rif_init(void) | |
661 | { | |
1b310fca | 662 | rif_timer.expires = jiffies + sysctl_tr_rif_timeout; |
b24b8a24 | 663 | setup_timer(&rif_timer, rif_check_expire, 0); |
1da177e4 | 664 | add_timer(&rif_timer); |
36f0bebd PE |
665 | #ifdef CONFIG_SYSCTL |
666 | register_sysctl_paths(tr_path, tr_table); | |
667 | #endif | |
457c4cbc | 668 | proc_net_fops_create(&init_net, "tr_rif", S_IRUGO, &rif_seq_fops); |
1da177e4 LT |
669 | return 0; |
670 | } | |
671 | ||
672 | module_init(rif_init); | |
673 | ||
1da177e4 LT |
674 | EXPORT_SYMBOL(tr_type_trans); |
675 | EXPORT_SYMBOL(alloc_trdev); | |
42224745 MR |
676 | |
677 | MODULE_LICENSE("GPL"); |