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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> |
5a0e3ad6 | 39 | #include <linux/slab.h> |
1da177e4 | 40 | #include <net/arp.h> |
457c4cbc | 41 | #include <net/net_namespace.h> |
1da177e4 LT |
42 | |
43 | static void tr_add_rif_info(struct trh_hdr *trh, struct net_device *dev); | |
44 | static void rif_check_expire(unsigned long dummy); | |
45 | ||
46 | #define TR_SR_DEBUG 0 | |
47 | ||
48 | /* | |
49 | * Each RIF entry we learn is kept this way | |
50 | */ | |
9afa0949 | 51 | |
c8b35d2a | 52 | struct rif_cache { |
1da177e4 LT |
53 | unsigned char addr[TR_ALEN]; |
54 | int iface; | |
c6b33653 AD |
55 | __be16 rcf; |
56 | __be16 rseg[8]; | |
c8b35d2a | 57 | struct rif_cache *next; |
1da177e4 LT |
58 | unsigned long last_used; |
59 | unsigned char local_ring; | |
60 | }; | |
61 | ||
62 | #define RIF_TABLE_SIZE 32 | |
63 | ||
64 | /* | |
65 | * We hash the RIF cache 32 ways. We do after all have to look it | |
66 | * up a lot. | |
67 | */ | |
9afa0949 | 68 | |
c8b35d2a | 69 | static struct rif_cache *rif_table[RIF_TABLE_SIZE]; |
1da177e4 LT |
70 | |
71 | static DEFINE_SPINLOCK(rif_lock); | |
72 | ||
73 | ||
74 | /* | |
75 | * Garbage disposal timer. | |
76 | */ | |
9afa0949 | 77 | |
1da177e4 LT |
78 | static struct timer_list rif_timer; |
79 | ||
81a21eb4 | 80 | static int sysctl_tr_rif_timeout = 60*10*HZ; |
1da177e4 LT |
81 | |
82 | static inline unsigned long rif_hash(const unsigned char *addr) | |
83 | { | |
84 | unsigned long x; | |
85 | ||
86 | x = addr[0]; | |
87 | x = (x << 2) ^ addr[1]; | |
88 | x = (x << 2) ^ addr[2]; | |
89 | x = (x << 2) ^ addr[3]; | |
90 | x = (x << 2) ^ addr[4]; | |
91 | x = (x << 2) ^ addr[5]; | |
92 | ||
93 | x ^= x >> 8; | |
94 | ||
95 | return x & (RIF_TABLE_SIZE - 1); | |
96 | } | |
97 | ||
98 | /* | |
99 | * Put the headers on a token ring packet. Token ring source routing | |
100 | * makes this a little more exciting than on ethernet. | |
101 | */ | |
9afa0949 | 102 | |
1da177e4 LT |
103 | static int tr_header(struct sk_buff *skb, struct net_device *dev, |
104 | unsigned short type, | |
3b04ddde | 105 | const void *daddr, const void *saddr, unsigned len) |
1da177e4 LT |
106 | { |
107 | struct trh_hdr *trh; | |
108 | int hdr_len; | |
109 | ||
9afa0949 YH |
110 | /* |
111 | * Add the 802.2 SNAP header if IP as the IPv4/IPv6 code calls | |
1da177e4 LT |
112 | * dev->hard_header directly. |
113 | */ | |
114 | if (type == ETH_P_IP || type == ETH_P_IPV6 || type == ETH_P_ARP) | |
115 | { | |
116 | struct trllc *trllc; | |
117 | ||
118 | hdr_len = sizeof(struct trh_hdr) + sizeof(struct trllc); | |
119 | trh = (struct trh_hdr *)skb_push(skb, hdr_len); | |
120 | trllc = (struct trllc *)(trh+1); | |
121 | trllc->dsap = trllc->ssap = EXTENDED_SAP; | |
122 | trllc->llc = UI_CMD; | |
123 | trllc->protid[0] = trllc->protid[1] = trllc->protid[2] = 0x00; | |
124 | trllc->ethertype = htons(type); | |
125 | } | |
126 | else | |
127 | { | |
128 | hdr_len = sizeof(struct trh_hdr); | |
9afa0949 | 129 | trh = (struct trh_hdr *)skb_push(skb, hdr_len); |
1da177e4 LT |
130 | } |
131 | ||
132 | trh->ac=AC; | |
133 | trh->fc=LLC_FRAME; | |
134 | ||
135 | if(saddr) | |
136 | memcpy(trh->saddr,saddr,dev->addr_len); | |
137 | else | |
138 | memcpy(trh->saddr,dev->dev_addr,dev->addr_len); | |
139 | ||
140 | /* | |
141 | * Build the destination and then source route the frame | |
142 | */ | |
9afa0949 YH |
143 | |
144 | if(daddr) | |
1da177e4 LT |
145 | { |
146 | memcpy(trh->daddr,daddr,dev->addr_len); | |
3b04ddde | 147 | tr_source_route(skb, trh, dev); |
a02cec21 | 148 | return hdr_len; |
1da177e4 LT |
149 | } |
150 | ||
151 | return -hdr_len; | |
152 | } | |
9afa0949 | 153 | |
1da177e4 LT |
154 | /* |
155 | * A neighbour discovery of some species (eg arp) has completed. We | |
156 | * can now send the packet. | |
157 | */ | |
9afa0949 YH |
158 | |
159 | static int tr_rebuild_header(struct sk_buff *skb) | |
1da177e4 LT |
160 | { |
161 | struct trh_hdr *trh=(struct trh_hdr *)skb->data; | |
162 | struct trllc *trllc=(struct trllc *)(skb->data+sizeof(struct trh_hdr)); | |
163 | struct net_device *dev = skb->dev; | |
164 | ||
165 | /* | |
166 | * FIXME: We don't yet support IPv6 over token rings | |
167 | */ | |
9afa0949 | 168 | |
1da177e4 | 169 | if(trllc->ethertype != htons(ETH_P_IP)) { |
0ac0760a | 170 | printk("tr_rebuild_header: Don't know how to resolve type %04X addresses ?\n", ntohs(trllc->ethertype)); |
1da177e4 LT |
171 | return 0; |
172 | } | |
173 | ||
174 | #ifdef CONFIG_INET | |
175 | if(arp_find(trh->daddr, skb)) { | |
176 | return 1; | |
177 | } | |
9afa0949 YH |
178 | else |
179 | #endif | |
180 | { | |
181 | tr_source_route(skb,trh,dev); | |
1da177e4 LT |
182 | return 0; |
183 | } | |
184 | } | |
9afa0949 | 185 | |
1da177e4 LT |
186 | /* |
187 | * Some of this is a bit hackish. We intercept RIF information | |
188 | * used for source routing. We also grab IP directly and don't feed | |
189 | * it via SNAP. | |
190 | */ | |
9afa0949 | 191 | |
0ac0760a | 192 | __be16 tr_type_trans(struct sk_buff *skb, struct net_device *dev) |
1da177e4 LT |
193 | { |
194 | ||
c1a4b86e | 195 | struct trh_hdr *trh; |
1da177e4 LT |
196 | struct trllc *trllc; |
197 | unsigned riflen=0; | |
9afa0949 | 198 | |
c8fb7948 | 199 | skb->dev = dev; |
459a98ed | 200 | skb_reset_mac_header(skb); |
c1a4b86e | 201 | trh = tr_hdr(skb); |
9afa0949 YH |
202 | |
203 | if(trh->saddr[0] & TR_RII) | |
1da177e4 LT |
204 | riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8; |
205 | ||
206 | trllc = (struct trllc *)(skb->data+sizeof(struct trh_hdr)-TR_MAXRIFLEN+riflen); | |
207 | ||
208 | skb_pull(skb,sizeof(struct trh_hdr)-TR_MAXRIFLEN+riflen); | |
209 | ||
9afa0949 | 210 | if(*trh->daddr & 0x80) |
1da177e4 | 211 | { |
9afa0949 | 212 | if(!memcmp(trh->daddr,dev->broadcast,TR_ALEN)) |
1da177e4 LT |
213 | skb->pkt_type=PACKET_BROADCAST; |
214 | else | |
215 | skb->pkt_type=PACKET_MULTICAST; | |
216 | } | |
217 | else if ( (trh->daddr[0] & 0x01) && (trh->daddr[1] & 0x00) && (trh->daddr[2] & 0x5E)) | |
218 | { | |
219 | skb->pkt_type=PACKET_MULTICAST; | |
220 | } | |
9afa0949 | 221 | else if(dev->flags & IFF_PROMISC) |
1da177e4 LT |
222 | { |
223 | if(memcmp(trh->daddr, dev->dev_addr, TR_ALEN)) | |
224 | skb->pkt_type=PACKET_OTHERHOST; | |
225 | } | |
226 | ||
227 | if ((skb->pkt_type != PACKET_BROADCAST) && | |
228 | (skb->pkt_type != PACKET_MULTICAST)) | |
9afa0949 | 229 | tr_add_rif_info(trh,dev) ; |
1da177e4 LT |
230 | |
231 | /* | |
9afa0949 | 232 | * Strip the SNAP header from ARP packets since we don't |
1da177e4 LT |
233 | * pass them through to the 802.2/SNAP layers. |
234 | */ | |
235 | ||
236 | if (trllc->dsap == EXTENDED_SAP && | |
0ac0760a AV |
237 | (trllc->ethertype == htons(ETH_P_IP) || |
238 | trllc->ethertype == htons(ETH_P_IPV6) || | |
239 | trllc->ethertype == htons(ETH_P_ARP))) | |
1da177e4 LT |
240 | { |
241 | skb_pull(skb, sizeof(struct trllc)); | |
242 | return trllc->ethertype; | |
243 | } | |
244 | ||
0ac0760a | 245 | return htons(ETH_P_TR_802_2); |
1da177e4 LT |
246 | } |
247 | ||
248 | /* | |
9afa0949 | 249 | * We try to do source routing... |
1da177e4 LT |
250 | */ |
251 | ||
3b04ddde SH |
252 | void tr_source_route(struct sk_buff *skb,struct trh_hdr *trh, |
253 | struct net_device *dev) | |
1da177e4 LT |
254 | { |
255 | int slack; | |
256 | unsigned int hash; | |
c8b35d2a | 257 | struct rif_cache *entry; |
1da177e4 | 258 | unsigned char *olddata; |
001dd250 | 259 | unsigned long flags; |
9afa0949 | 260 | static const unsigned char mcast_func_addr[] |
1da177e4 | 261 | = {0xC0,0x00,0x00,0x04,0x00,0x00}; |
9afa0949 | 262 | |
001dd250 | 263 | spin_lock_irqsave(&rif_lock, flags); |
1da177e4 LT |
264 | |
265 | /* | |
9afa0949 | 266 | * Broadcasts are single route as stated in RFC 1042 |
1da177e4 LT |
267 | */ |
268 | if( (!memcmp(&(trh->daddr[0]),&(dev->broadcast[0]),TR_ALEN)) || | |
269 | (!memcmp(&(trh->daddr[0]),&(mcast_func_addr[0]), TR_ALEN)) ) | |
270 | { | |
9afa0949 | 271 | trh->rcf=htons((((sizeof(trh->rcf)) << 8) & TR_RCF_LEN_MASK) |
1da177e4 LT |
272 | | TR_RCF_FRAME2K | TR_RCF_LIMITED_BROADCAST); |
273 | trh->saddr[0]|=TR_RII; | |
274 | } | |
9afa0949 | 275 | else |
1da177e4 LT |
276 | { |
277 | hash = rif_hash(trh->daddr); | |
278 | /* | |
279 | * Walk the hash table and look for an entry | |
280 | */ | |
281 | for(entry=rif_table[hash];entry && memcmp(&(entry->addr[0]),&(trh->daddr[0]),TR_ALEN);entry=entry->next); | |
282 | ||
283 | /* | |
284 | * If we found an entry we can route the frame. | |
285 | */ | |
9afa0949 | 286 | if(entry) |
1da177e4 LT |
287 | { |
288 | #if TR_SR_DEBUG | |
e174961c | 289 | printk("source routing for %pM\n", trh->daddr); |
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 | |
e174961c JB |
371 | printk("adding rif_entry: addr:%pM rcf:%04X\n", |
372 | trh->saddr, ntohs(trh->rcf)); | |
1da177e4 LT |
373 | #endif |
374 | /* | |
375 | * Allocate our new entry. A failure to allocate loses | |
376 | * use the information. This is harmless. | |
377 | * | |
378 | * FIXME: We ought to keep some kind of cache size | |
379 | * limiting and adjust the timers to suit. | |
380 | */ | |
c8b35d2a | 381 | entry=kmalloc(sizeof(struct rif_cache),GFP_ATOMIC); |
1da177e4 | 382 | |
9afa0949 | 383 | if(!entry) |
1da177e4 LT |
384 | { |
385 | printk(KERN_DEBUG "tr.c: Couldn't malloc rif cache entry !\n"); | |
001dd250 | 386 | spin_unlock_irqrestore(&rif_lock, flags); |
1da177e4 LT |
387 | return; |
388 | } | |
389 | ||
390 | memcpy(&(entry->addr[0]),&(trh->saddr[0]),TR_ALEN); | |
391 | entry->iface = dev->ifindex; | |
392 | entry->next=rif_table[hash]; | |
393 | entry->last_used=jiffies; | |
394 | rif_table[hash]=entry; | |
395 | ||
396 | if (rii_p) | |
397 | { | |
398 | entry->rcf = trh->rcf & htons((unsigned short)~TR_RCF_BROADCAST_MASK); | |
399 | memcpy(&(entry->rseg[0]),&(trh->rseg[0]),8*sizeof(unsigned short)); | |
400 | entry->local_ring = 0; | |
1da177e4 LT |
401 | } |
402 | else | |
403 | { | |
404 | entry->local_ring = 1; | |
405 | } | |
9afa0949 | 406 | } |
1da177e4 | 407 | else /* Y. Tahara added */ |
9afa0949 | 408 | { |
1da177e4 LT |
409 | /* |
410 | * Update existing entries | |
411 | */ | |
9afa0949 | 412 | if (!entry->local_ring) |
1da177e4 LT |
413 | if (entry->rcf != (trh->rcf & htons((unsigned short)~TR_RCF_BROADCAST_MASK)) && |
414 | !(trh->rcf & htons(TR_RCF_BROADCAST_MASK))) | |
415 | { | |
416 | #if TR_SR_DEBUG | |
e174961c JB |
417 | printk("updating rif_entry: addr:%pM rcf:%04X\n", |
418 | trh->saddr, ntohs(trh->rcf)); | |
1da177e4 LT |
419 | #endif |
420 | entry->rcf = trh->rcf & htons((unsigned short)~TR_RCF_BROADCAST_MASK); | |
9afa0949 YH |
421 | memcpy(&(entry->rseg[0]),&(trh->rseg[0]),8*sizeof(unsigned short)); |
422 | } | |
423 | entry->last_used=jiffies; | |
1da177e4 | 424 | } |
5ac660ee | 425 | trh->saddr[0]=saddr0; /* put the routing indicator back for tcpdump */ |
001dd250 | 426 | spin_unlock_irqrestore(&rif_lock, flags); |
1da177e4 LT |
427 | } |
428 | ||
429 | /* | |
430 | * Scan the cache with a timer and see what we need to throw out. | |
431 | */ | |
432 | ||
9afa0949 | 433 | static void rif_check_expire(unsigned long dummy) |
1da177e4 LT |
434 | { |
435 | int i; | |
001dd250 | 436 | unsigned long flags, next_interval = jiffies + sysctl_tr_rif_timeout/2; |
1da177e4 | 437 | |
001dd250 | 438 | spin_lock_irqsave(&rif_lock, flags); |
9afa0949 | 439 | |
1da177e4 | 440 | for(i =0; i < RIF_TABLE_SIZE; i++) { |
c8b35d2a | 441 | struct rif_cache *entry, **pentry; |
9afa0949 | 442 | |
1da177e4 LT |
443 | pentry = rif_table+i; |
444 | while((entry=*pentry) != NULL) { | |
445 | unsigned long expires | |
446 | = entry->last_used + sysctl_tr_rif_timeout; | |
447 | ||
448 | if (time_before_eq(expires, jiffies)) { | |
449 | *pentry = entry->next; | |
450 | kfree(entry); | |
451 | } else { | |
452 | pentry = &entry->next; | |
453 | ||
454 | if (time_before(expires, next_interval)) | |
455 | next_interval = expires; | |
456 | } | |
457 | } | |
458 | } | |
9afa0949 | 459 | |
001dd250 | 460 | spin_unlock_irqrestore(&rif_lock, flags); |
1da177e4 LT |
461 | |
462 | mod_timer(&rif_timer, next_interval); | |
463 | ||
464 | } | |
465 | ||
466 | /* | |
467 | * Generate the /proc/net information for the token ring RIF | |
468 | * routing. | |
469 | */ | |
9afa0949 | 470 | |
1da177e4 LT |
471 | #ifdef CONFIG_PROC_FS |
472 | ||
c8b35d2a | 473 | static struct rif_cache *rif_get_idx(loff_t pos) |
1da177e4 LT |
474 | { |
475 | int i; | |
c8b35d2a | 476 | struct rif_cache *entry; |
1da177e4 LT |
477 | loff_t off = 0; |
478 | ||
9afa0949 | 479 | for(i = 0; i < RIF_TABLE_SIZE; i++) |
1da177e4 LT |
480 | for(entry = rif_table[i]; entry; entry = entry->next) { |
481 | if (off == pos) | |
482 | return entry; | |
483 | ++off; | |
484 | } | |
485 | ||
486 | return NULL; | |
487 | } | |
488 | ||
489 | static void *rif_seq_start(struct seq_file *seq, loff_t *pos) | |
81c55329 | 490 | __acquires(&rif_lock) |
1da177e4 | 491 | { |
001dd250 | 492 | spin_lock_irq(&rif_lock); |
1da177e4 LT |
493 | |
494 | return *pos ? rif_get_idx(*pos - 1) : SEQ_START_TOKEN; | |
495 | } | |
496 | ||
497 | static void *rif_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
498 | { | |
499 | int i; | |
c8b35d2a | 500 | struct rif_cache *ent = v; |
1da177e4 LT |
501 | |
502 | ++*pos; | |
503 | ||
504 | if (v == SEQ_START_TOKEN) { | |
505 | i = -1; | |
506 | goto scan; | |
507 | } | |
508 | ||
9afa0949 | 509 | if (ent->next) |
1da177e4 LT |
510 | return ent->next; |
511 | ||
512 | i = rif_hash(ent->addr); | |
513 | scan: | |
514 | while (++i < RIF_TABLE_SIZE) { | |
515 | if ((ent = rif_table[i]) != NULL) | |
516 | return ent; | |
517 | } | |
518 | return NULL; | |
519 | } | |
520 | ||
521 | static void rif_seq_stop(struct seq_file *seq, void *v) | |
81c55329 | 522 | __releases(&rif_lock) |
1da177e4 | 523 | { |
001dd250 | 524 | spin_unlock_irq(&rif_lock); |
1da177e4 LT |
525 | } |
526 | ||
527 | static int rif_seq_show(struct seq_file *seq, void *v) | |
528 | { | |
529 | int j, rcf_len, segment, brdgnmb; | |
c8b35d2a | 530 | struct rif_cache *entry = v; |
1da177e4 LT |
531 | |
532 | if (v == SEQ_START_TOKEN) | |
533 | seq_puts(seq, | |
534 | "if TR address TTL rcf routing segments\n"); | |
535 | else { | |
881d966b | 536 | struct net_device *dev = dev_get_by_index(&init_net, entry->iface); |
1da177e4 LT |
537 | long ttl = (long) (entry->last_used + sysctl_tr_rif_timeout) |
538 | - (long) jiffies; | |
539 | ||
e174961c | 540 | seq_printf(seq, "%s %pM %7li ", |
1da177e4 | 541 | dev?dev->name:"?", |
e174961c | 542 | entry->addr, |
1da177e4 LT |
543 | ttl/HZ); |
544 | ||
545 | if (entry->local_ring) | |
9afa0949 | 546 | seq_puts(seq, "local\n"); |
1da177e4 LT |
547 | else { |
548 | ||
549 | seq_printf(seq, "%04X", ntohs(entry->rcf)); | |
9afa0949 | 550 | rcf_len = ((ntohs(entry->rcf) & TR_RCF_LEN_MASK)>>8)-2; |
1da177e4 | 551 | if (rcf_len) |
9afa0949 | 552 | rcf_len >>= 1; |
1da177e4 LT |
553 | for(j = 1; j < rcf_len; j++) { |
554 | if(j==1) { | |
555 | segment=ntohs(entry->rseg[j-1])>>4; | |
556 | seq_printf(seq," %03X",segment); | |
3ff50b79 SH |
557 | } |
558 | ||
1da177e4 LT |
559 | segment=ntohs(entry->rseg[j])>>4; |
560 | brdgnmb=ntohs(entry->rseg[j-1])&0x00f; | |
561 | seq_printf(seq,"-%01X-%03X",brdgnmb,segment); | |
562 | } | |
563 | seq_putc(seq, '\n'); | |
564 | } | |
3384901f WY |
565 | |
566 | if (dev) | |
567 | dev_put(dev); | |
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 | ||
3b04ddde SH |
595 | static const struct header_ops tr_header_ops = { |
596 | .create = tr_header, | |
597 | .rebuild= tr_rebuild_header, | |
598 | }; | |
599 | ||
1da177e4 LT |
600 | static void tr_setup(struct net_device *dev) |
601 | { | |
602 | /* | |
603 | * Configure and register | |
604 | */ | |
9afa0949 | 605 | |
3b04ddde | 606 | dev->header_ops = &tr_header_ops; |
1da177e4 LT |
607 | |
608 | dev->type = ARPHRD_IEEE802_TR; | |
609 | dev->hard_header_len = TR_HLEN; | |
610 | dev->mtu = 2000; | |
611 | dev->addr_len = TR_ALEN; | |
612 | dev->tx_queue_len = 100; /* Long queues on tr */ | |
9afa0949 | 613 | |
1da177e4 LT |
614 | memset(dev->broadcast,0xFF, TR_ALEN); |
615 | ||
616 | /* New-style flags. */ | |
617 | dev->flags = IFF_BROADCAST | IFF_MULTICAST ; | |
618 | } | |
619 | ||
620 | /** | |
621 | * alloc_trdev - Register token ring device | |
622 | * @sizeof_priv: Size of additional driver-private structure to be allocated | |
623 | * for this token ring device | |
624 | * | |
625 | * Fill in the fields of the device structure with token ring-generic values. | |
626 | * | |
627 | * Constructs a new net device, complete with a private data area of | |
628 | * size @sizeof_priv. A 32-byte (not bit) alignment is enforced for | |
629 | * this private data area. | |
630 | */ | |
631 | struct net_device *alloc_trdev(int sizeof_priv) | |
632 | { | |
633 | return alloc_netdev(sizeof_priv, "tr%d", tr_setup); | |
634 | } | |
635 | ||
36f0bebd PE |
636 | #ifdef CONFIG_SYSCTL |
637 | static struct ctl_table tr_table[] = { | |
638 | { | |
36f0bebd PE |
639 | .procname = "rif_timeout", |
640 | .data = &sysctl_tr_rif_timeout, | |
641 | .maxlen = sizeof(int), | |
642 | .mode = 0644, | |
6d9f239a | 643 | .proc_handler = proc_dointvec |
36f0bebd | 644 | }, |
f8572d8f | 645 | { }, |
36f0bebd PE |
646 | }; |
647 | ||
648 | static __initdata struct ctl_path tr_path[] = { | |
f8572d8f EB |
649 | { .procname = "net", }, |
650 | { .procname = "token-ring", }, | |
36f0bebd PE |
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"); |