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[deliverable/linux.git] / net / decnet / dn_dev.c
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1da177e4
LT		 1/*
2 * DECnet An implementation of the DECnet protocol suite for the LINUX
3 * operating system. DECnet is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * DECnet Device Layer
7 *
8 * Authors: Steve Whitehouse <SteveW@ACM.org>
9 * Eduardo Marcelo Serrat <emserrat@geocities.com>
10 *
11 * Changes:
12 * Steve Whitehouse : Devices now see incoming frames so they
13 * can mark on who it came from.
14 * Steve Whitehouse : Fixed bug in creating neighbours. Each neighbour
15 * can now have a device specific setup func.
16 * Steve Whitehouse : Added /proc/sys/net/decnet/conf/<dev>/
17 * Steve Whitehouse : Fixed bug which sometimes killed timer
18 * Steve Whitehouse : Multiple ifaddr support
19 * Steve Whitehouse : SIOCGIFCONF is now a compile time option
20 * Steve Whitehouse : /proc/sys/net/decnet/conf/<sys>/forwarding
21 * Steve Whitehouse : Removed timer1 - it's a user space issue now
22 * Patrick Caulfield : Fixed router hello message format
23 * Steve Whitehouse : Got rid of constant sizes for blksize for
24 * devices. All mtu based now.
25 */
26
4fc268d2 27#include <linux/capability.h>
1da177e4
LT		 28#include <linux/module.h>
29#include <linux/moduleparam.h>
30#include <linux/init.h>
31#include <linux/net.h>
32#include <linux/netdevice.h>
33#include <linux/proc_fs.h>
34#include <linux/seq_file.h>
35#include <linux/timer.h>
36#include <linux/string.h>
1823730f 37#include <linux/if_addr.h>
1da177e4
LT		 38#include <linux/if_arp.h>
39#include <linux/if_ether.h>
40#include <linux/skbuff.h>
1da177e4
LT		 41#include <linux/sysctl.h>
42#include <linux/notifier.h>
43#include <asm/uaccess.h>
44#include <asm/system.h>
45#include <net/neighbour.h>
46#include <net/dst.h>
47#include <net/flow.h>
a8731cbf 48#include <net/fib_rules.h>
a6f01cac 49#include <net/netlink.h>
1da177e4
LT		 50#include <net/dn.h>
51#include <net/dn_dev.h>
52#include <net/dn_route.h>
53#include <net/dn_neigh.h>
54#include <net/dn_fib.h>
55
56#define DN_IFREQ_SIZE (sizeof(struct ifreq) - sizeof(struct sockaddr) + sizeof(struct sockaddr_dn))
57
58static char dn_rt_all_end_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x04,0x00,0x00};
59static char dn_rt_all_rt_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x03,0x00,0x00};
60static char dn_hiord[ETH_ALEN] = {0xAA,0x00,0x04,0x00,0x00,0x00};
61static unsigned char dn_eco_version[3] = {0x02,0x00,0x00};
62
63extern struct neigh_table dn_neigh_table;
64
65/*
66 * decnet_address is kept in network order.
67 */
c4ea94ab 68__le16 decnet_address = 0;
1da177e4
LT		 69
70static DEFINE_RWLOCK(dndev_lock);
71static struct net_device *decnet_default_device;
e041c683 72static BLOCKING_NOTIFIER_HEAD(dnaddr_chain);
1da177e4
LT		 73
74static struct dn_dev *dn_dev_create(struct net_device *dev, int *err);
75static void dn_dev_delete(struct net_device *dev);
b020b942 76static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa);
1da177e4
LT		 77
78static int dn_eth_up(struct net_device *);
79static void dn_eth_down(struct net_device *);
80static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa);
81static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa);
82
83static struct dn_dev_parms dn_dev_list[] = {
84{
85 .type = ARPHRD_ETHER, /* Ethernet */
86 .mode = DN_DEV_BCAST,
87 .state = DN_DEV_S_RU,
88 .t2 = 1,
89 .t3 = 10,
90 .name = "ethernet",
91 .ctl_name = NET_DECNET_CONF_ETHER,
92 .up = dn_eth_up,
93 .down = dn_eth_down,
94 .timer3 = dn_send_brd_hello,
95},
96{
97 .type = ARPHRD_IPGRE, /* DECnet tunneled over GRE in IP */
98 .mode = DN_DEV_BCAST,
99 .state = DN_DEV_S_RU,
100 .t2 = 1,
101 .t3 = 10,
102 .name = "ipgre",
103 .ctl_name = NET_DECNET_CONF_GRE,
104 .timer3 = dn_send_brd_hello,
105},
106#if 0
107{
108 .type = ARPHRD_X25, /* Bog standard X.25 */
109 .mode = DN_DEV_UCAST,
110 .state = DN_DEV_S_DS,
111 .t2 = 1,
112 .t3 = 120,
113 .name = "x25",
114 .ctl_name = NET_DECNET_CONF_X25,
115 .timer3 = dn_send_ptp_hello,
116},
117#endif
118#if 0
119{
120 .type = ARPHRD_PPP, /* DECnet over PPP */
121 .mode = DN_DEV_BCAST,
122 .state = DN_DEV_S_RU,
123 .t2 = 1,
124 .t3 = 10,
125 .name = "ppp",
126 .ctl_name = NET_DECNET_CONF_PPP,
127 .timer3 = dn_send_brd_hello,
128},
129#endif
130{
131 .type = ARPHRD_DDCMP, /* DECnet over DDCMP */
132 .mode = DN_DEV_UCAST,
133 .state = DN_DEV_S_DS,
134 .t2 = 1,
135 .t3 = 120,
136 .name = "ddcmp",
137 .ctl_name = NET_DECNET_CONF_DDCMP,
138 .timer3 = dn_send_ptp_hello,
139},
140{
141 .type = ARPHRD_LOOPBACK, /* Loopback interface - always last */
142 .mode = DN_DEV_BCAST,
143 .state = DN_DEV_S_RU,
144 .t2 = 1,
145 .t3 = 10,
146 .name = "loopback",
147 .ctl_name = NET_DECNET_CONF_LOOPBACK,
148 .timer3 = dn_send_brd_hello,
149}
150};
151
152#define DN_DEV_LIST_SIZE (sizeof(dn_dev_list)/sizeof(struct dn_dev_parms))
153
154#define DN_DEV_PARMS_OFFSET(x) ((int) ((char *) &((struct dn_dev_parms *)0)->x))
155
156#ifdef CONFIG_SYSCTL
157
158static int min_t2[] = { 1 };
159static int max_t2[] = { 60 }; /* No max specified, but this seems sensible */
160static int min_t3[] = { 1 };
161static int max_t3[] = { 8191 }; /* Must fit in 16 bits when multiplied by BCT3MULT or T3MULT */
162
163static int min_priority[1];
164static int max_priority[] = { 127 }; /* From DECnet spec */
165
166static int dn_forwarding_proc(ctl_table *, int, struct file *,
167 void __user *, size_t *, loff_t *);
168static int dn_forwarding_sysctl(ctl_table *table, int __user *name, int nlen,
169 void __user *oldval, size_t __user *oldlenp,
1f29bcd7 170 void __user *newval, size_t newlen);
1da177e4
LT		 171
172static struct dn_dev_sysctl_table {
173 struct ctl_table_header *sysctl_header;
174 ctl_table dn_dev_vars[5];
175 ctl_table dn_dev_dev[2];
176 ctl_table dn_dev_conf_dir[2];
177 ctl_table dn_dev_proto_dir[2];
178 ctl_table dn_dev_root_dir[2];
179} dn_dev_sysctl = {
180 NULL,
181 {
182 {
183 .ctl_name = NET_DECNET_CONF_DEV_FORWARDING,
184 .procname = "forwarding",
185 .data = (void *)DN_DEV_PARMS_OFFSET(forwarding),
186 .maxlen = sizeof(int),
187 .mode = 0644,
188 .proc_handler = dn_forwarding_proc,
189 .strategy = dn_forwarding_sysctl,
190 },
191 {
192 .ctl_name = NET_DECNET_CONF_DEV_PRIORITY,
193 .procname = "priority",
194 .data = (void *)DN_DEV_PARMS_OFFSET(priority),
195 .maxlen = sizeof(int),
196 .mode = 0644,
197 .proc_handler = proc_dointvec_minmax,
198 .strategy = sysctl_intvec,
199 .extra1 = &min_priority,
200 .extra2 = &max_priority
201 },
202 {
203 .ctl_name = NET_DECNET_CONF_DEV_T2,
204 .procname = "t2",
205 .data = (void *)DN_DEV_PARMS_OFFSET(t2),
206 .maxlen = sizeof(int),
207 .mode = 0644,
208 .proc_handler = proc_dointvec_minmax,
209 .strategy = sysctl_intvec,
210 .extra1 = &min_t2,
211 .extra2 = &max_t2
212 },
213 {
214 .ctl_name = NET_DECNET_CONF_DEV_T3,
215 .procname = "t3",
216 .data = (void *)DN_DEV_PARMS_OFFSET(t3),
217 .maxlen = sizeof(int),
218 .mode = 0644,
219 .proc_handler = proc_dointvec_minmax,
220 .strategy = sysctl_intvec,
221 .extra1 = &min_t3,
222 .extra2 = &max_t3
223 },
224 {0}
225 },
226 {{
227 .ctl_name = 0,
228 .procname = "",
229 .mode = 0555,
230 .child = dn_dev_sysctl.dn_dev_vars
231 }, {0}},
232 {{
233 .ctl_name = NET_DECNET_CONF,
234 .procname = "conf",
235 .mode = 0555,
236 .child = dn_dev_sysctl.dn_dev_dev
237 }, {0}},
238 {{
239 .ctl_name = NET_DECNET,
240 .procname = "decnet",
241 .mode = 0555,
242 .child = dn_dev_sysctl.dn_dev_conf_dir
243 }, {0}},
244 {{
245 .ctl_name = CTL_NET,
246 .procname = "net",
247 .mode = 0555,
248 .child = dn_dev_sysctl.dn_dev_proto_dir
249 }, {0}}
250};
251
252static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
253{
254 struct dn_dev_sysctl_table *t;
255 int i;
256
c66b721a 257 t = kmemdup(&dn_dev_sysctl, sizeof(*t), GFP_KERNEL);
1da177e4
LT		 258 if (t == NULL)
259 return;
260
1da177e4
LT		 261 for(i = 0; i < ARRAY_SIZE(t->dn_dev_vars) - 1; i++) {
262 long offset = (long)t->dn_dev_vars[i].data;
263 t->dn_dev_vars[i].data = ((char *)parms) + offset;
264 t->dn_dev_vars[i].de = NULL;
265 }
266
267 if (dev) {
268 t->dn_dev_dev[0].procname = dev->name;
269 t->dn_dev_dev[0].ctl_name = dev->ifindex;
270 } else {
271 t->dn_dev_dev[0].procname = parms->name;
272 t->dn_dev_dev[0].ctl_name = parms->ctl_name;
273 }
274
275 t->dn_dev_dev[0].child = t->dn_dev_vars;
276 t->dn_dev_dev[0].de = NULL;
277 t->dn_dev_conf_dir[0].child = t->dn_dev_dev;
278 t->dn_dev_conf_dir[0].de = NULL;
279 t->dn_dev_proto_dir[0].child = t->dn_dev_conf_dir;
280 t->dn_dev_proto_dir[0].de = NULL;
281 t->dn_dev_root_dir[0].child = t->dn_dev_proto_dir;
282 t->dn_dev_root_dir[0].de = NULL;
283 t->dn_dev_vars[0].extra1 = (void *)dev;
284
285 t->sysctl_header = register_sysctl_table(t->dn_dev_root_dir, 0);
286 if (t->sysctl_header == NULL)
287 kfree(t);
288 else
289 parms->sysctl = t;
290}
291
292static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
293{
294 if (parms->sysctl) {
295 struct dn_dev_sysctl_table *t = parms->sysctl;
296 parms->sysctl = NULL;
297 unregister_sysctl_table(t->sysctl_header);
298 kfree(t);
299 }
300}
301
302static int dn_forwarding_proc(ctl_table *table, int write,
303 struct file *filep,
304 void __user *buffer,
305 size_t *lenp, loff_t *ppos)
306{
307#ifdef CONFIG_DECNET_ROUTER
308 struct net_device *dev = table->extra1;
309 struct dn_dev *dn_db;
310 int err;
311 int tmp, old;
312
313 if (table->extra1 == NULL)
314 return -EINVAL;
315
316 dn_db = dev->dn_ptr;
317 old = dn_db->parms.forwarding;
318
319 err = proc_dointvec(table, write, filep, buffer, lenp, ppos);
320
321 if ((err >= 0) && write) {
322 if (dn_db->parms.forwarding < 0)
323 dn_db->parms.forwarding = 0;
324 if (dn_db->parms.forwarding > 2)
325 dn_db->parms.forwarding = 2;
326 /*
327 * What an ugly hack this is... its works, just. It
328 * would be nice if sysctl/proc were just that little
329 * bit more flexible so I don't have to write a special
330 * routine, or suffer hacks like this - SJW
331 */
332 tmp = dn_db->parms.forwarding;
333 dn_db->parms.forwarding = old;
334 if (dn_db->parms.down)
335 dn_db->parms.down(dev);
336 dn_db->parms.forwarding = tmp;
337 if (dn_db->parms.up)
338 dn_db->parms.up(dev);
339 }
340
341 return err;
342#else
343 return -EINVAL;
344#endif
345}
346
347static int dn_forwarding_sysctl(ctl_table *table, int __user *name, int nlen,
348 void __user *oldval, size_t __user *oldlenp,
1f29bcd7 349 void __user *newval, size_t newlen)
1da177e4
LT		 350{
351#ifdef CONFIG_DECNET_ROUTER
352 struct net_device *dev = table->extra1;
353 struct dn_dev *dn_db;
354 int value;
355
356 if (table->extra1 == NULL)
357 return -EINVAL;
358
359 dn_db = dev->dn_ptr;
360
361 if (newval && newlen) {
362 if (newlen != sizeof(int))
363 return -EINVAL;
364
365 if (get_user(value, (int __user *)newval))
366 return -EFAULT;
367 if (value < 0)
368 return -EINVAL;
369 if (value > 2)
370 return -EINVAL;
371
372 if (dn_db->parms.down)
373 dn_db->parms.down(dev);
374 dn_db->parms.forwarding = value;
375 if (dn_db->parms.up)
376 dn_db->parms.up(dev);
377 }
378
379 return 0;
380#else
381 return -EINVAL;
382#endif
383}
384
385#else /* CONFIG_SYSCTL */
386static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
387{
388}
389static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
390{
391}
392
393#endif /* CONFIG_SYSCTL */
394
395static inline __u16 mtu2blksize(struct net_device *dev)
396{
397 u32 blksize = dev->mtu;
398 if (blksize > 0xffff)
399 blksize = 0xffff;
400
401 if (dev->type == ARPHRD_ETHER ||
402 dev->type == ARPHRD_PPP ||
403 dev->type == ARPHRD_IPGRE ||
404 dev->type == ARPHRD_LOOPBACK)
405 blksize -= 2;
406
407 return (__u16)blksize;
408}
409
410static struct dn_ifaddr *dn_dev_alloc_ifa(void)
411{
412 struct dn_ifaddr *ifa;
413
0da974f4 414 ifa = kzalloc(sizeof(*ifa), GFP_KERNEL);
1da177e4
LT		 415
416 return ifa;
417}
418
419static __inline__ void dn_dev_free_ifa(struct dn_ifaddr *ifa)
420{
421 kfree(ifa);
422}
423
424static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr **ifap, int destroy)
425{
426 struct dn_ifaddr *ifa1 = *ifap;
427 unsigned char mac_addr[6];
428 struct net_device *dev = dn_db->dev;
429
430 ASSERT_RTNL();
431
432 *ifap = ifa1->ifa_next;
433
434 if (dn_db->dev->type == ARPHRD_ETHER) {
c4ea94ab 435 if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) {
1da177e4
LT		 436 dn_dn2eth(mac_addr, ifa1->ifa_local);
437 dev_mc_delete(dev, mac_addr, ETH_ALEN, 0);
438 }
439 }
440
b020b942 441 dn_ifaddr_notify(RTM_DELADDR, ifa1);
e041c683 442 blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1);
1da177e4
LT		 443 if (destroy) {
444 dn_dev_free_ifa(ifa1);
445
446 if (dn_db->ifa_list == NULL)
447 dn_dev_delete(dn_db->dev);
448 }
449}
450
451static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa)
452{
453 struct net_device *dev = dn_db->dev;
454 struct dn_ifaddr *ifa1;
455 unsigned char mac_addr[6];
456
457 ASSERT_RTNL();
458
459 /* Check for duplicates */
460 for(ifa1 = dn_db->ifa_list; ifa1; ifa1 = ifa1->ifa_next) {
461 if (ifa1->ifa_local == ifa->ifa_local)
462 return -EEXIST;
463 }
464
465 if (dev->type == ARPHRD_ETHER) {
c4ea94ab 466 if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) {
1da177e4
LT		 467 dn_dn2eth(mac_addr, ifa->ifa_local);
468 dev_mc_add(dev, mac_addr, ETH_ALEN, 0);
469 dev_mc_upload(dev);
470 }
471 }
472
473 ifa->ifa_next = dn_db->ifa_list;
474 dn_db->ifa_list = ifa;
475
b020b942 476 dn_ifaddr_notify(RTM_NEWADDR, ifa);
e041c683 477 blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa);
1da177e4
LT		 478
479 return 0;
480}
481
482static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa)
483{
484 struct dn_dev *dn_db = dev->dn_ptr;
485 int rv;
486
487 if (dn_db == NULL) {
488 int err;
489 dn_db = dn_dev_create(dev, &err);
490 if (dn_db == NULL)
491 return err;
492 }
493
494 ifa->ifa_dev = dn_db;
495
496 if (dev->flags & IFF_LOOPBACK)
497 ifa->ifa_scope = RT_SCOPE_HOST;
498
499 rv = dn_dev_insert_ifa(dn_db, ifa);
500 if (rv)
501 dn_dev_free_ifa(ifa);
502 return rv;
503}
504
505
506int dn_dev_ioctl(unsigned int cmd, void __user *arg)
507{
508 char buffer[DN_IFREQ_SIZE];
509 struct ifreq *ifr = (struct ifreq *)buffer;
510 struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr;
511 struct dn_dev *dn_db;
512 struct net_device *dev;
513 struct dn_ifaddr *ifa = NULL, **ifap = NULL;
514 int ret = 0;
515
516 if (copy_from_user(ifr, arg, DN_IFREQ_SIZE))
517 return -EFAULT;
518 ifr->ifr_name[IFNAMSIZ-1] = 0;
519
520#ifdef CONFIG_KMOD
521 dev_load(ifr->ifr_name);
522#endif
523
524 switch(cmd) {
525 case SIOCGIFADDR:
526 break;
527 case SIOCSIFADDR:
528 if (!capable(CAP_NET_ADMIN))
529 return -EACCES;
530 if (sdn->sdn_family != AF_DECnet)
531 return -EINVAL;
532 break;
533 default:
534 return -EINVAL;
535 }
536
537 rtnl_lock();
538
539 if ((dev = __dev_get_by_name(ifr->ifr_name)) == NULL) {
540 ret = -ENODEV;
541 goto done;
542 }
543
544 if ((dn_db = dev->dn_ptr) != NULL) {
545 for (ifap = &dn_db->ifa_list; (ifa=*ifap) != NULL; ifap = &ifa->ifa_next)
546 if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0)
547 break;
548 }
549
550 if (ifa == NULL && cmd != SIOCSIFADDR) {
551 ret = -EADDRNOTAVAIL;
552 goto done;
553 }
554
555 switch(cmd) {
556 case SIOCGIFADDR:
c4ea94ab 557 *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local;
1da177e4
LT		 558 goto rarok;
559
560 case SIOCSIFADDR:
561 if (!ifa) {
562 if ((ifa = dn_dev_alloc_ifa()) == NULL) {
563 ret = -ENOBUFS;
564 break;
565 }
566 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
567 } else {
568 if (ifa->ifa_local == dn_saddr2dn(sdn))
569 break;
570 dn_dev_del_ifa(dn_db, ifap, 0);
571 }
572
573 ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn);
574
575 ret = dn_dev_set_ifa(dev, ifa);
576 }
577done:
578 rtnl_unlock();
579
580 return ret;
581rarok:
582 if (copy_to_user(arg, ifr, DN_IFREQ_SIZE))
583 ret = -EFAULT;
584 goto done;
585}
586
587struct net_device *dn_dev_get_default(void)
588{
589 struct net_device *dev;
590 read_lock(&dndev_lock);
591 dev = decnet_default_device;
592 if (dev) {
593 if (dev->dn_ptr)
594 dev_hold(dev);
595 else
596 dev = NULL;
597 }
598 read_unlock(&dndev_lock);
599 return dev;
600}
601
602int dn_dev_set_default(struct net_device *dev, int force)
603{
604 struct net_device *old = NULL;
605 int rv = -EBUSY;
606 if (!dev->dn_ptr)
607 return -ENODEV;
608 write_lock(&dndev_lock);
609 if (force || decnet_default_device == NULL) {
610 old = decnet_default_device;
611 decnet_default_device = dev;
612 rv = 0;
613 }
614 write_unlock(&dndev_lock);
615 if (old)
6a57b2ee 616 dev_put(old);
1da177e4
LT		 617 return rv;
618}
619
620static void dn_dev_check_default(struct net_device *dev)
621{
622 write_lock(&dndev_lock);
623 if (dev == decnet_default_device) {
624 decnet_default_device = NULL;
625 } else {
626 dev = NULL;
627 }
628 write_unlock(&dndev_lock);
629 if (dev)
630 dev_put(dev);
631}
632
633static struct dn_dev *dn_dev_by_index(int ifindex)
634{
635 struct net_device *dev;
636 struct dn_dev *dn_dev = NULL;
637 dev = dev_get_by_index(ifindex);
638 if (dev) {
639 dn_dev = dev->dn_ptr;
640 dev_put(dev);
641 }
642
643 return dn_dev;
644}
645
4a89c256
TG		 646static struct nla_policy dn_ifa_policy[IFA_MAX+1] __read_mostly = {
647 [IFA_ADDRESS] = { .type = NLA_U16 },
648 [IFA_LOCAL] = { .type = NLA_U16 },
649 [IFA_LABEL] = { .type = NLA_STRING,
650 .len = IFNAMSIZ - 1 },
651};
652
653static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1da177e4 654{
4a89c256 655 struct nlattr *tb[IFA_MAX+1];
1da177e4 656 struct dn_dev *dn_db;
4a89c256 657 struct ifaddrmsg *ifm;
1da177e4 658 struct dn_ifaddr *ifa, **ifap;
4a89c256
TG		 659 int err = -EADDRNOTAVAIL;
660
661 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
662 if (err < 0)
663 goto errout;
1da177e4 664
4a89c256 665 ifm = nlmsg_data(nlh);
1da177e4 666 if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL)
4a89c256
TG		 667 goto errout;
668
669 for (ifap = &dn_db->ifa_list; (ifa = *ifap); ifap = &ifa->ifa_next) {
670 if (tb[IFA_LOCAL] &&
671 nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2))
672 continue;
1da177e4 673
4a89c256 674 if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label))
1da177e4
LT		 675 continue;
676
677 dn_dev_del_ifa(dn_db, ifap, 1);
678 return 0;
679 }
680
4a89c256
TG		 681errout:
682 return err;
1da177e4
LT		 683}
684
4a89c256 685static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1da177e4 686{
4a89c256 687 struct nlattr *tb[IFA_MAX+1];
1da177e4
LT		 688 struct net_device *dev;
689 struct dn_dev *dn_db;
4a89c256 690 struct ifaddrmsg *ifm;
1da177e4 691 struct dn_ifaddr *ifa;
4a89c256
TG		 692 int err;
693
694 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
695 if (err < 0)
696 return err;
1da177e4 697
4a89c256 698 if (tb[IFA_LOCAL] == NULL)
1da177e4
LT		 699 return -EINVAL;
700
4a89c256 701 ifm = nlmsg_data(nlh);
1da177e4
LT		 702 if ((dev = __dev_get_by_index(ifm->ifa_index)) == NULL)
703 return -ENODEV;
704
705 if ((dn_db = dev->dn_ptr) == NULL) {
706 int err;
707 dn_db = dn_dev_create(dev, &err);
708 if (!dn_db)
709 return err;
710 }
711
712 if ((ifa = dn_dev_alloc_ifa()) == NULL)
713 return -ENOBUFS;
714
4a89c256
TG		 715 if (tb[IFA_ADDRESS] == NULL)
716 tb[IFA_ADDRESS] = tb[IFA_LOCAL];
717
718 ifa->ifa_local = nla_get_le16(tb[IFA_LOCAL]);
719 ifa->ifa_address = nla_get_le16(tb[IFA_ADDRESS]);
1da177e4
LT		 720 ifa->ifa_flags = ifm->ifa_flags;
721 ifa->ifa_scope = ifm->ifa_scope;
722 ifa->ifa_dev = dn_db;
4a89c256
TG		 723
724 if (tb[IFA_LABEL])
725 nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ);
1da177e4
LT		 726 else
727 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
728
4a89c256
TG		 729 err = dn_dev_insert_ifa(dn_db, ifa);
730 if (err)
1da177e4 731 dn_dev_free_ifa(ifa);
4a89c256
TG		 732
733 return err;
1da177e4
LT		 734}
735
a6f01cac
TG		 736static inline size_t dn_ifaddr_nlmsg_size(void)
737{
738 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
739 + nla_total_size(IFNAMSIZ) /* IFA_LABEL */
740 + nla_total_size(2) /* IFA_ADDRESS */
741 + nla_total_size(2); /* IFA_LOCAL */
742}
743
4a89c256
TG		 744static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa,
745 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4
LT		 746{
747 struct ifaddrmsg *ifm;
748 struct nlmsghdr *nlh;
1da177e4 749
4a89c256
TG		 750 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*ifm), flags);
751 if (nlh == NULL)
752 return -ENOBUFS;
1da177e4 753
4a89c256 754 ifm = nlmsg_data(nlh);
1da177e4
LT		 755 ifm->ifa_family = AF_DECnet;
756 ifm->ifa_prefixlen = 16;
757 ifm->ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT;
758 ifm->ifa_scope = ifa->ifa_scope;
759 ifm->ifa_index = ifa->ifa_dev->dev->ifindex;
4a89c256 760
1da177e4 761 if (ifa->ifa_address)
4a89c256 762 NLA_PUT_LE16(skb, IFA_ADDRESS, ifa->ifa_address);
1da177e4 763 if (ifa->ifa_local)
4a89c256 764 NLA_PUT_LE16(skb, IFA_LOCAL, ifa->ifa_local);
1da177e4 765 if (ifa->ifa_label[0])
4a89c256 766 NLA_PUT_STRING(skb, IFA_LABEL, ifa->ifa_label);
1da177e4 767
4a89c256
TG		 768 return nlmsg_end(skb, nlh);
769
770nla_put_failure:
771 return nlmsg_cancel(skb, nlh);
1da177e4
LT		 772}
773
b020b942 774static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa)
1da177e4
LT		 775{
776 struct sk_buff *skb;
dc738dd8 777 int err = -ENOBUFS;
1da177e4 778
a6f01cac 779 skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL);
dc738dd8
TG		 780 if (skb == NULL)
781 goto errout;
782
4a89c256 783 err = dn_nl_fill_ifaddr(skb, ifa, 0, 0, event, 0);
a6f01cac
TG		 784 /* failure implies BUG in dn_ifaddr_nlmsg_size() */
785 BUG_ON(err < 0);
dc738dd8
TG		 786
787 err = rtnl_notify(skb, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL);
788errout:
789 if (err < 0)
790 rtnl_set_sk_err(RTNLGRP_DECnet_IFADDR, err);
1da177e4
LT		 791}
792
4a89c256 793static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4 794{
4a89c256 795 int idx, dn_idx = 0, skip_ndevs, skip_naddr;
1da177e4
LT		 796 struct net_device *dev;
797 struct dn_dev *dn_db;
798 struct dn_ifaddr *ifa;
799
4a89c256
TG		 800 skip_ndevs = cb->args[0];
801 skip_naddr = cb->args[1];
802
1da177e4 803 read_lock(&dev_base_lock);
4a89c256
TG		 804 for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) {
805 if (idx < skip_ndevs)
1da177e4 806 continue;
4a89c256
TG		 807 else if (idx > skip_ndevs) {
808 /* Only skip over addresses for first dev dumped
809 * in this iteration (idx == skip_ndevs) */
810 skip_naddr = 0;
811 }
812
1da177e4
LT		 813 if ((dn_db = dev->dn_ptr) == NULL)
814 continue;
815
4a89c256
TG		 816 for (ifa = dn_db->ifa_list, dn_idx = 0; ifa;
817 ifa = ifa->ifa_next, dn_idx++) {
818 if (dn_idx < skip_naddr)
1da177e4
LT		 819 continue;
820
4a89c256
TG		 821 if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid,
822 cb->nlh->nlmsg_seq, RTM_NEWADDR,
823 NLM_F_MULTI) < 0)
1da177e4
LT		 824 goto done;
825 }
826 }
827done:
828 read_unlock(&dev_base_lock);
4a89c256 829
1da177e4
LT		 830 cb->args[0] = idx;
831 cb->args[1] = dn_idx;
832
833 return skb->len;
834}
835
c4ea94ab 836static int dn_dev_get_first(struct net_device *dev, __le16 *addr)
1da177e4
LT		 837{
838 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
839 struct dn_ifaddr *ifa;
840 int rv = -ENODEV;
841 if (dn_db == NULL)
842 goto out;
843 ifa = dn_db->ifa_list;
844 if (ifa != NULL) {
845 *addr = ifa->ifa_local;
846 rv = 0;
847 }
848out:
849 return rv;
850}
851
852/*
853 * Find a default address to bind to.
854 *
855 * This is one of those areas where the initial VMS concepts don't really
856 * map onto the Linux concepts, and since we introduced multiple addresses
857 * per interface we have to cope with slightly odd ways of finding out what
858 * "our address" really is. Mostly it's not a problem; for this we just guess
859 * a sensible default. Eventually the routing code will take care of all the
860 * nasties for us I hope.
861 */
c4ea94ab 862int dn_dev_bind_default(__le16 *addr)
1da177e4
LT		 863{
864 struct net_device *dev;
865 int rv;
866 dev = dn_dev_get_default();
867last_chance:
868 if (dev) {
869 read_lock(&dev_base_lock);
870 rv = dn_dev_get_first(dev, addr);
871 read_unlock(&dev_base_lock);
872 dev_put(dev);
873 if (rv == 0 || dev == &loopback_dev)
874 return rv;
875 }
876 dev = &loopback_dev;
877 dev_hold(dev);
878 goto last_chance;
879}
880
881static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa)
882{
883 struct endnode_hello_message *msg;
884 struct sk_buff *skb = NULL;
c4ea94ab 885 __le16 *pktlen;
1da177e4
LT		 886 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
887
888 if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL)
889 return;
890
891 skb->dev = dev;
892
893 msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg));
894
895 msg->msgflg = 0x0D;
896 memcpy(msg->tiver, dn_eco_version, 3);
897 dn_dn2eth(msg->id, ifa->ifa_local);
898 msg->iinfo = DN_RT_INFO_ENDN;
899 msg->blksize = dn_htons(mtu2blksize(dev));
900 msg->area = 0x00;
901 memset(msg->seed, 0, 8);
902 memcpy(msg->neighbor, dn_hiord, ETH_ALEN);
903
904 if (dn_db->router) {
905 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
906 dn_dn2eth(msg->neighbor, dn->addr);
907 }
908
909 msg->timer = dn_htons((unsigned short)dn_db->parms.t3);
910 msg->mpd = 0x00;
911 msg->datalen = 0x02;
912 memset(msg->data, 0xAA, 2);
913
c4ea94ab 914 pktlen = (__le16 *)skb_push(skb,2);
1da177e4
LT		 915 *pktlen = dn_htons(skb->len - 2);
916
917 skb->nh.raw = skb->data;
918
919 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id);
920}
921
922
923#define DRDELAY (5 * HZ)
924
925static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa)
926{
927 /* First check time since device went up */
928 if ((jiffies - dn_db->uptime) < DRDELAY)
929 return 0;
930
931 /* If there is no router, then yes... */
932 if (!dn_db->router)
933 return 1;
934
935 /* otherwise only if we have a higher priority or.. */
936 if (dn->priority < dn_db->parms.priority)
937 return 1;
938
939 /* if we have equal priority and a higher node number */
940 if (dn->priority != dn_db->parms.priority)
941 return 0;
942
943 if (dn_ntohs(dn->addr) < dn_ntohs(ifa->ifa_local))
944 return 1;
945
946 return 0;
947}
948
949static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa)
950{
951 int n;
952 struct dn_dev *dn_db = dev->dn_ptr;
953 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
954 struct sk_buff *skb;
955 size_t size;
956 unsigned char *ptr;
957 unsigned char *i1, *i2;
c4ea94ab 958 __le16 *pktlen;
1da177e4
LT		 959 char *src;
960
961 if (mtu2blksize(dev) < (26 + 7))
962 return;
963
964 n = mtu2blksize(dev) - 26;
965 n /= 7;
966
967 if (n > 32)
968 n = 32;
969
970 size = 2 + 26 + 7 * n;
971
972 if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL)
973 return;
974
975 skb->dev = dev;
976 ptr = skb_put(skb, size);
977
978 *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH;
979 *ptr++ = 2; /* ECO */
980 *ptr++ = 0;
981 *ptr++ = 0;
982 dn_dn2eth(ptr, ifa->ifa_local);
983 src = ptr;
984 ptr += ETH_ALEN;
985 *ptr++ = dn_db->parms.forwarding == 1 ?
986 DN_RT_INFO_L1RT : DN_RT_INFO_L2RT;
c4ea94ab 987 *((__le16 *)ptr) = dn_htons(mtu2blksize(dev));
1da177e4
LT		 988 ptr += 2;
989 *ptr++ = dn_db->parms.priority; /* Priority */
990 *ptr++ = 0; /* Area: Reserved */
c4ea94ab 991 *((__le16 *)ptr) = dn_htons((unsigned short)dn_db->parms.t3);
1da177e4
LT		 992 ptr += 2;
993 *ptr++ = 0; /* MPD: Reserved */
994 i1 = ptr++;
995 memset(ptr, 0, 7); /* Name: Reserved */
996 ptr += 7;
997 i2 = ptr++;
998
999 n = dn_neigh_elist(dev, ptr, n);
1000
1001 *i2 = 7 * n;
1002 *i1 = 8 + *i2;
1003
1004 skb_trim(skb, (27 + *i2));
1005
c4ea94ab 1006 pktlen = (__le16 *)skb_push(skb, 2);
1da177e4
LT		 1007 *pktlen = dn_htons(skb->len - 2);
1008
1009 skb->nh.raw = skb->data;
1010
1011 if (dn_am_i_a_router(dn, dn_db, ifa)) {
1012 struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC);
1013 if (skb2) {
1014 dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src);
1015 }
1016 }
1017
1018 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
1019}
1020
1021static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa)
1022{
1023 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
1024
1025 if (dn_db->parms.forwarding == 0)
1026 dn_send_endnode_hello(dev, ifa);
1027 else
1028 dn_send_router_hello(dev, ifa);
1029}
1030
1031static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa)
1032{
1033 int tdlen = 16;
1034 int size = dev->hard_header_len + 2 + 4 + tdlen;
1035 struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC);
1036 int i;
1037 unsigned char *ptr;
1038 char src[ETH_ALEN];
1039
1040 if (skb == NULL)
1041 return ;
1042
1043 skb->dev = dev;
1044 skb_push(skb, dev->hard_header_len);
1045 ptr = skb_put(skb, 2 + 4 + tdlen);
1046
1047 *ptr++ = DN_RT_PKT_HELO;
c4ea94ab 1048 *((__le16 *)ptr) = ifa->ifa_local;
1da177e4
LT		 1049 ptr += 2;
1050 *ptr++ = tdlen;
1051
1052 for(i = 0; i < tdlen; i++)
1053 *ptr++ = 0252;
1054
1055 dn_dn2eth(src, ifa->ifa_local);
1056 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
1057}
1058
1059static int dn_eth_up(struct net_device *dev)
1060{
1061 struct dn_dev *dn_db = dev->dn_ptr;
1062
1063 if (dn_db->parms.forwarding == 0)
1064 dev_mc_add(dev, dn_rt_all_end_mcast, ETH_ALEN, 0);
1065 else
1066 dev_mc_add(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0);
1067
1068 dev_mc_upload(dev);
1069
1070 dn_db->use_long = 1;
1071
1072 return 0;
1073}
1074
1075static void dn_eth_down(struct net_device *dev)
1076{
1077 struct dn_dev *dn_db = dev->dn_ptr;
1078
1079 if (dn_db->parms.forwarding == 0)
1080 dev_mc_delete(dev, dn_rt_all_end_mcast, ETH_ALEN, 0);
1081 else
1082 dev_mc_delete(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0);
1083}
1084
1085static void dn_dev_set_timer(struct net_device *dev);
1086
1087static void dn_dev_timer_func(unsigned long arg)
1088{
1089 struct net_device *dev = (struct net_device *)arg;
1090 struct dn_dev *dn_db = dev->dn_ptr;
1091 struct dn_ifaddr *ifa;
1092
1093 if (dn_db->t3 <= dn_db->parms.t2) {
1094 if (dn_db->parms.timer3) {
1095 for(ifa = dn_db->ifa_list; ifa; ifa = ifa->ifa_next) {
1096 if (!(ifa->ifa_flags & IFA_F_SECONDARY))
1097 dn_db->parms.timer3(dev, ifa);
1098 }
1099 }
1100 dn_db->t3 = dn_db->parms.t3;
1101 } else {
1102 dn_db->t3 -= dn_db->parms.t2;
1103 }
1104
1105 dn_dev_set_timer(dev);
1106}
1107
1108static void dn_dev_set_timer(struct net_device *dev)
1109{
1110 struct dn_dev *dn_db = dev->dn_ptr;
1111
1112 if (dn_db->parms.t2 > dn_db->parms.t3)
1113 dn_db->parms.t2 = dn_db->parms.t3;
1114
1115 dn_db->timer.data = (unsigned long)dev;
1116 dn_db->timer.function = dn_dev_timer_func;
1117 dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ);
1118
1119 add_timer(&dn_db->timer);
1120}
1121
1122struct dn_dev *dn_dev_create(struct net_device *dev, int *err)
1123{
1124 int i;
1125 struct dn_dev_parms *p = dn_dev_list;
1126 struct dn_dev *dn_db;
1127
1128 for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) {
1129 if (p->type == dev->type)
1130 break;
1131 }
1132
1133 *err = -ENODEV;
1134 if (i == DN_DEV_LIST_SIZE)
1135 return NULL;
1136
1137 *err = -ENOBUFS;
0da974f4 1138 if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL)
1da177e4
LT		 1139 return NULL;
1140
1da177e4
LT		 1141 memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms));
1142 smp_wmb();
1143 dev->dn_ptr = dn_db;
1144 dn_db->dev = dev;
1145 init_timer(&dn_db->timer);
1146
1147 dn_db->uptime = jiffies;
95743deb
EB		 1148
1149 dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table);
1150 if (!dn_db->neigh_parms) {
1151 dev->dn_ptr = NULL;
1152 kfree(dn_db);
1153 return NULL;
1154 }
1155
1da177e4
LT		 1156 if (dn_db->parms.up) {
1157 if (dn_db->parms.up(dev) < 0) {
95743deb 1158 neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
1da177e4
LT		 1159 dev->dn_ptr = NULL;
1160 kfree(dn_db);
1161 return NULL;
1162 }
1163 }
1164
1da177e4
LT		 1165 dn_dev_sysctl_register(dev, &dn_db->parms);
1166
1167 dn_dev_set_timer(dev);
1168
1169 *err = 0;
1170 return dn_db;
1171}
1172
1173
1174/*
1175 * This processes a device up event. We only start up
1176 * the loopback device & ethernet devices with correct
1177 * MAC addreses automatically. Others must be started
1178 * specifically.
1179 *
1180 * FIXME: How should we configure the loopback address ? If we could dispense
1181 * with using decnet_address here and for autobind, it will be one less thing
1182 * for users to worry about setting up.
1183 */
1184
1185void dn_dev_up(struct net_device *dev)
1186{
1187 struct dn_ifaddr *ifa;
c4ea94ab 1188 __le16 addr = decnet_address;
1da177e4
LT		 1189 int maybe_default = 0;
1190 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
1191
1192 if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK))
1193 return;
1194
1195 /*
1196 * Need to ensure that loopback device has a dn_db attached to it
1197 * to allow creation of neighbours against it, even though it might
1198 * not have a local address of its own. Might as well do the same for
1199 * all autoconfigured interfaces.
1200 */
1201 if (dn_db == NULL) {
1202 int err;
1203 dn_db = dn_dev_create(dev, &err);
1204 if (dn_db == NULL)
1205 return;
1206 }
1207
1208 if (dev->type == ARPHRD_ETHER) {
1209 if (memcmp(dev->dev_addr, dn_hiord, 4) != 0)
1210 return;
c4ea94ab 1211 addr = dn_eth2dn(dev->dev_addr);
1da177e4
LT		 1212 maybe_default = 1;
1213 }
1214
1215 if (addr == 0)
1216 return;
1217
1218 if ((ifa = dn_dev_alloc_ifa()) == NULL)
1219 return;
1220
1221 ifa->ifa_local = ifa->ifa_address = addr;
1222 ifa->ifa_flags = 0;
1223 ifa->ifa_scope = RT_SCOPE_UNIVERSE;
1224 strcpy(ifa->ifa_label, dev->name);
1225
1226 dn_dev_set_ifa(dev, ifa);
1227
1228 /*
1229 * Automagically set the default device to the first automatically
1230 * configured ethernet card in the system.
1231 */
1232 if (maybe_default) {
1233 dev_hold(dev);
1234 if (dn_dev_set_default(dev, 0))
1235 dev_put(dev);
1236 }
1237}
1238
1239static void dn_dev_delete(struct net_device *dev)
1240{
1241 struct dn_dev *dn_db = dev->dn_ptr;
1242
1243 if (dn_db == NULL)
1244 return;
1245
1246 del_timer_sync(&dn_db->timer);
1247 dn_dev_sysctl_unregister(&dn_db->parms);
1248 dn_dev_check_default(dev);
1249 neigh_ifdown(&dn_neigh_table, dev);
1250
1251 if (dn_db->parms.down)
1252 dn_db->parms.down(dev);
1253
1254 dev->dn_ptr = NULL;
1255
1256 neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
1257 neigh_ifdown(&dn_neigh_table, dev);
1258
1259 if (dn_db->router)
1260 neigh_release(dn_db->router);
1261 if (dn_db->peer)
1262 neigh_release(dn_db->peer);
1263
1264 kfree(dn_db);
1265}
1266
1267void dn_dev_down(struct net_device *dev)
1268{
1269 struct dn_dev *dn_db = dev->dn_ptr;
1270 struct dn_ifaddr *ifa;
1271
1272 if (dn_db == NULL)
1273 return;
1274
1275 while((ifa = dn_db->ifa_list) != NULL) {
1276 dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0);
1277 dn_dev_free_ifa(ifa);
1278 }
1279
1280 dn_dev_delete(dev);
1281}
1282
1283void dn_dev_init_pkt(struct sk_buff *skb)
1284{
1285 return;
1286}
1287
1288void dn_dev_veri_pkt(struct sk_buff *skb)
1289{
1290 return;
1291}
1292
1293void dn_dev_hello(struct sk_buff *skb)
1294{
1295 return;
1296}
1297
1298void dn_dev_devices_off(void)
1299{
1300 struct net_device *dev;
1301
1302 rtnl_lock();
1303 for(dev = dev_base; dev; dev = dev->next)
1304 dn_dev_down(dev);
1305 rtnl_unlock();
1306
1307}
1308
1309void dn_dev_devices_on(void)
1310{
1311 struct net_device *dev;
1312
1313 rtnl_lock();
1314 for(dev = dev_base; dev; dev = dev->next) {
1315 if (dev->flags & IFF_UP)
1316 dn_dev_up(dev);
1317 }
1318 rtnl_unlock();
1319}
1320
1321int register_dnaddr_notifier(struct notifier_block *nb)
1322{
e041c683 1323 return blocking_notifier_chain_register(&dnaddr_chain, nb);
1da177e4
LT		 1324}
1325
1326int unregister_dnaddr_notifier(struct notifier_block *nb)
1327{
e041c683 1328 return blocking_notifier_chain_unregister(&dnaddr_chain, nb);
1da177e4
LT		 1329}
1330
1331#ifdef CONFIG_PROC_FS
1332static inline struct net_device *dn_dev_get_next(struct seq_file *seq, struct net_device *dev)
1333{
1334 do {
1335 dev = dev->next;
1336 } while(dev && !dev->dn_ptr);
1337
1338 return dev;
1339}
1340
1341static struct net_device *dn_dev_get_idx(struct seq_file *seq, loff_t pos)
1342{
1343 struct net_device *dev;
1344
1345 dev = dev_base;
1346 if (dev && !dev->dn_ptr)
1347 dev = dn_dev_get_next(seq, dev);
1348 if (pos) {
1349 while(dev && (dev = dn_dev_get_next(seq, dev)))
1350 --pos;
1351 }
1352 return dev;
1353}
1354
1355static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos)
1356{
1357 if (*pos) {
1358 struct net_device *dev;
1359 read_lock(&dev_base_lock);
1360 dev = dn_dev_get_idx(seq, *pos - 1);
1361 if (dev == NULL)
1362 read_unlock(&dev_base_lock);
1363 return dev;
1364 }
1365 return SEQ_START_TOKEN;
1366}
1367
1368static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1369{
1370 struct net_device *dev = v;
1371 loff_t one = 1;
1372
1373 if (v == SEQ_START_TOKEN) {
1374 dev = dn_dev_seq_start(seq, &one);
1375 } else {
1376 dev = dn_dev_get_next(seq, dev);
1377 if (dev == NULL)
1378 read_unlock(&dev_base_lock);
1379 }
1380 ++*pos;
1381 return dev;
1382}
1383
1384static void dn_dev_seq_stop(struct seq_file *seq, void *v)
1385{
1386 if (v && v != SEQ_START_TOKEN)
1387 read_unlock(&dev_base_lock);
1388}
1389
1390static char *dn_type2asc(char type)
1391{
1392 switch(type) {
1393 case DN_DEV_BCAST:
1394 return "B";
1395 case DN_DEV_UCAST:
1396 return "U";
1397 case DN_DEV_MPOINT:
1398 return "M";
1399 }
1400
1401 return "?";
1402}
1403
1404static int dn_dev_seq_show(struct seq_file *seq, void *v)
1405{
1406 if (v == SEQ_START_TOKEN)
1407 seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer\n");
1408 else {
1409 struct net_device *dev = v;
1410 char peer_buf[DN_ASCBUF_LEN];
1411 char router_buf[DN_ASCBUF_LEN];
1412 struct dn_dev *dn_db = dev->dn_ptr;
1413
1414 seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu"
1415 " %04hu %03d %02x %-10s %-7s %-7s\n",
1416 dev->name ? dev->name : "???",
1417 dn_type2asc(dn_db->parms.mode),
1418 0, 0,
1419 dn_db->t3, dn_db->parms.t3,
1420 mtu2blksize(dev),
1421 dn_db->parms.priority,
1422 dn_db->parms.state, dn_db->parms.name,
c4ea94ab
SW		 1423 dn_db->router ? dn_addr2asc(dn_ntohs(*(__le16 *)dn_db->router->primary_key), router_buf) : "",
1424 dn_db->peer ? dn_addr2asc(dn_ntohs(*(__le16 *)dn_db->peer->primary_key), peer_buf) : "");
1da177e4
LT		 1425 }
1426 return 0;
1427}
1428
1429static struct seq_operations dn_dev_seq_ops = {
1430 .start = dn_dev_seq_start,
1431 .next = dn_dev_seq_next,
1432 .stop = dn_dev_seq_stop,
1433 .show = dn_dev_seq_show,
1434};
1435
1436static int dn_dev_seq_open(struct inode *inode, struct file *file)
1437{
1438 return seq_open(file, &dn_dev_seq_ops);
1439}
1440
1441static struct file_operations dn_dev_seq_fops = {
1442 .owner = THIS_MODULE,
1443 .open = dn_dev_seq_open,
1444 .read = seq_read,
1445 .llseek = seq_lseek,
1446 .release = seq_release,
1447};
1448
1449#endif /* CONFIG_PROC_FS */
1450
db46edc6 1451static struct rtnetlink_link dnet_rtnetlink_table[RTM_NR_MSGTYPES] =
1da177e4 1452{
4a89c256
TG		 1453 [RTM_NEWADDR - RTM_BASE] = { .doit = dn_nl_newaddr, },
1454 [RTM_DELADDR - RTM_BASE] = { .doit = dn_nl_deladdr, },
1455 [RTM_GETADDR - RTM_BASE] = { .dumpit = dn_nl_dump_ifaddr, },
1da177e4 1456#ifdef CONFIG_DECNET_ROUTER
db46edc6
TG		 1457 [RTM_NEWROUTE - RTM_BASE] = { .doit = dn_fib_rtm_newroute, },
1458 [RTM_DELROUTE - RTM_BASE] = { .doit = dn_fib_rtm_delroute, },
1459 [RTM_GETROUTE - RTM_BASE] = { .doit = dn_cache_getroute,
1460 .dumpit = dn_fib_dump, },
db46edc6 1461 [RTM_GETRULE - RTM_BASE] = { .dumpit = dn_fib_dump_rules, },
1da177e4 1462#else
db46edc6 1463 [RTM_GETROUTE - RTM_BASE] = { .doit = dn_cache_getroute,
25ae3f59 1464 .dumpit = dn_cache_dump, },
1da177e4
LT		 1465#endif
1466
1467};
1468
1469static int __initdata addr[2];
1470module_param_array(addr, int, NULL, 0444);
1471MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node");
1472
1473void __init dn_dev_init(void)
1474{
1475 if (addr[0] > 63 || addr[0] < 0) {
1476 printk(KERN_ERR "DECnet: Area must be between 0 and 63");
1477 return;
1478 }
1479
1480 if (addr[1] > 1023 || addr[1] < 0) {
1481 printk(KERN_ERR "DECnet: Node must be between 0 and 1023");
1482 return;
1483 }
1484
1485 decnet_address = dn_htons((addr[0] << 10) | addr[1]);
1486
1487 dn_dev_devices_on();
1488
1489 rtnetlink_links[PF_DECnet] = dnet_rtnetlink_table;
1490
1491 proc_net_fops_create("decnet_dev", S_IRUGO, &dn_dev_seq_fops);
1492
1493#ifdef CONFIG_SYSCTL
1494 {
1495 int i;
1496 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1497 dn_dev_sysctl_register(NULL, &dn_dev_list[i]);
1498 }
1499#endif /* CONFIG_SYSCTL */
1500}
1501
1502void __exit dn_dev_cleanup(void)
1503{
1504 rtnetlink_links[PF_DECnet] = NULL;
1505
1506#ifdef CONFIG_SYSCTL
1507 {
1508 int i;
1509 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1510 dn_dev_sysctl_unregister(&dn_dev_list[i]);
1511 }
1512#endif /* CONFIG_SYSCTL */
1513
1514 proc_net_remove("decnet_dev");
1515
1516 dn_dev_devices_off();
1517}
Linux kernel - Deliverables
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