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MAINTAINERS: add Matt Mackall and Herbert Xu to HARDWARE RANDOM NUMBER GENERATOR
[deliverable/linux.git] / net / decnet / dn_dev.c
CommitLineData
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>
457c4cbc 45#include <net/net_namespace.h>
1da177e4
LT		 46#include <net/neighbour.h>
47#include <net/dst.h>
48#include <net/flow.h>
a8731cbf 49#include <net/fib_rules.h>
a6f01cac 50#include <net/netlink.h>
1da177e4
LT		 51#include <net/dn.h>
52#include <net/dn_dev.h>
53#include <net/dn_route.h>
54#include <net/dn_neigh.h>
55#include <net/dn_fib.h>
56
57#define DN_IFREQ_SIZE (sizeof(struct ifreq) - sizeof(struct sockaddr) + sizeof(struct sockaddr_dn))
58
59static char dn_rt_all_end_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x04,0x00,0x00};
60static char dn_rt_all_rt_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x03,0x00,0x00};
61static char dn_hiord[ETH_ALEN] = {0xAA,0x00,0x04,0x00,0x00,0x00};
62static unsigned char dn_eco_version[3] = {0x02,0x00,0x00};
63
64extern struct neigh_table dn_neigh_table;
65
66/*
67 * decnet_address is kept in network order.
68 */
c4ea94ab 69__le16 decnet_address = 0;
1da177e4
LT		 70
71static DEFINE_RWLOCK(dndev_lock);
72static struct net_device *decnet_default_device;
e041c683 73static BLOCKING_NOTIFIER_HEAD(dnaddr_chain);
1da177e4
LT		 74
75static struct dn_dev *dn_dev_create(struct net_device *dev, int *err);
76static void dn_dev_delete(struct net_device *dev);
b020b942 77static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa);
1da177e4
LT		 78
79static int dn_eth_up(struct net_device *);
80static void dn_eth_down(struct net_device *);
81static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa);
82static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa);
83
84static struct dn_dev_parms dn_dev_list[] = {
85{
86 .type = ARPHRD_ETHER, /* Ethernet */
87 .mode = DN_DEV_BCAST,
88 .state = DN_DEV_S_RU,
89 .t2 = 1,
90 .t3 = 10,
91 .name = "ethernet",
92 .ctl_name = NET_DECNET_CONF_ETHER,
93 .up = dn_eth_up,
94 .down = dn_eth_down,
95 .timer3 = dn_send_brd_hello,
96},
97{
98 .type = ARPHRD_IPGRE, /* DECnet tunneled over GRE in IP */
99 .mode = DN_DEV_BCAST,
100 .state = DN_DEV_S_RU,
101 .t2 = 1,
102 .t3 = 10,
103 .name = "ipgre",
104 .ctl_name = NET_DECNET_CONF_GRE,
105 .timer3 = dn_send_brd_hello,
106},
107#if 0
108{
109 .type = ARPHRD_X25, /* Bog standard X.25 */
110 .mode = DN_DEV_UCAST,
111 .state = DN_DEV_S_DS,
112 .t2 = 1,
113 .t3 = 120,
114 .name = "x25",
115 .ctl_name = NET_DECNET_CONF_X25,
116 .timer3 = dn_send_ptp_hello,
117},
118#endif
119#if 0
120{
121 .type = ARPHRD_PPP, /* DECnet over PPP */
122 .mode = DN_DEV_BCAST,
123 .state = DN_DEV_S_RU,
124 .t2 = 1,
125 .t3 = 10,
126 .name = "ppp",
127 .ctl_name = NET_DECNET_CONF_PPP,
128 .timer3 = dn_send_brd_hello,
129},
130#endif
131{
132 .type = ARPHRD_DDCMP, /* DECnet over DDCMP */
133 .mode = DN_DEV_UCAST,
134 .state = DN_DEV_S_DS,
135 .t2 = 1,
136 .t3 = 120,
137 .name = "ddcmp",
138 .ctl_name = NET_DECNET_CONF_DDCMP,
139 .timer3 = dn_send_ptp_hello,
140},
141{
142 .type = ARPHRD_LOOPBACK, /* Loopback interface - always last */
143 .mode = DN_DEV_BCAST,
144 .state = DN_DEV_S_RU,
145 .t2 = 1,
146 .t3 = 10,
147 .name = "loopback",
148 .ctl_name = NET_DECNET_CONF_LOOPBACK,
149 .timer3 = dn_send_brd_hello,
150}
151};
152
8b14a536 153#define DN_DEV_LIST_SIZE ARRAY_SIZE(dn_dev_list)
1da177e4 154
8fa0b315 155#define DN_DEV_PARMS_OFFSET(x) offsetof(struct dn_dev_parms, x)
1da177e4
LT		 156
157#ifdef CONFIG_SYSCTL
158
159static int min_t2[] = { 1 };
160static int max_t2[] = { 60 }; /* No max specified, but this seems sensible */
161static int min_t3[] = { 1 };
162static int max_t3[] = { 8191 }; /* Must fit in 16 bits when multiplied by BCT3MULT or T3MULT */
163
164static int min_priority[1];
165static int max_priority[] = { 127 }; /* From DECnet spec */
166
167static int dn_forwarding_proc(ctl_table *, int, struct file *,
168 void __user *, size_t *, loff_t *);
f221e726 169static int dn_forwarding_sysctl(ctl_table *table,
1da177e4 170 void __user *oldval, size_t __user *oldlenp,
1f29bcd7 171 void __user *newval, size_t newlen);
1da177e4
LT		 172
173static struct dn_dev_sysctl_table {
174 struct ctl_table_header *sysctl_header;
175 ctl_table dn_dev_vars[5];
1da177e4
LT		 176} dn_dev_sysctl = {
177 NULL,
178 {
179 {
180 .ctl_name = NET_DECNET_CONF_DEV_FORWARDING,
181 .procname = "forwarding",
182 .data = (void *)DN_DEV_PARMS_OFFSET(forwarding),
183 .maxlen = sizeof(int),
184 .mode = 0644,
185 .proc_handler = dn_forwarding_proc,
186 .strategy = dn_forwarding_sysctl,
187 },
188 {
189 .ctl_name = NET_DECNET_CONF_DEV_PRIORITY,
190 .procname = "priority",
191 .data = (void *)DN_DEV_PARMS_OFFSET(priority),
192 .maxlen = sizeof(int),
193 .mode = 0644,
194 .proc_handler = proc_dointvec_minmax,
195 .strategy = sysctl_intvec,
196 .extra1 = &min_priority,
197 .extra2 = &max_priority
198 },
199 {
200 .ctl_name = NET_DECNET_CONF_DEV_T2,
201 .procname = "t2",
202 .data = (void *)DN_DEV_PARMS_OFFSET(t2),
203 .maxlen = sizeof(int),
204 .mode = 0644,
205 .proc_handler = proc_dointvec_minmax,
206 .strategy = sysctl_intvec,
207 .extra1 = &min_t2,
208 .extra2 = &max_t2
209 },
210 {
211 .ctl_name = NET_DECNET_CONF_DEV_T3,
212 .procname = "t3",
213 .data = (void *)DN_DEV_PARMS_OFFSET(t3),
214 .maxlen = sizeof(int),
215 .mode = 0644,
216 .proc_handler = proc_dointvec_minmax,
217 .strategy = sysctl_intvec,
218 .extra1 = &min_t3,
219 .extra2 = &max_t3
220 },
221 {0}
222 },
1da177e4
LT		 223};
224
225static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
226{
227 struct dn_dev_sysctl_table *t;
228 int i;
229
3151a9ab
PE		 230#define DN_CTL_PATH_DEV 3
231
232 struct ctl_path dn_ctl_path[] = {
233 { .procname = "net", .ctl_name = CTL_NET, },
234 { .procname = "decnet", .ctl_name = NET_DECNET, },
235 { .procname = "conf", .ctl_name = NET_DECNET_CONF, },
236 { /* to be set */ },
237 { },
238 };
239
c66b721a 240 t = kmemdup(&dn_dev_sysctl, sizeof(*t), GFP_KERNEL);
1da177e4
LT		 241 if (t == NULL)
242 return;
243
1da177e4
LT		 244 for(i = 0; i < ARRAY_SIZE(t->dn_dev_vars) - 1; i++) {
245 long offset = (long)t->dn_dev_vars[i].data;
246 t->dn_dev_vars[i].data = ((char *)parms) + offset;
1da177e4
LT		 247 }
248
249 if (dev) {
3151a9ab
PE		 250 dn_ctl_path[DN_CTL_PATH_DEV].procname = dev->name;
251 dn_ctl_path[DN_CTL_PATH_DEV].ctl_name = dev->ifindex;
1da177e4 252 } else {
3151a9ab
PE		 253 dn_ctl_path[DN_CTL_PATH_DEV].procname = parms->name;
254 dn_ctl_path[DN_CTL_PATH_DEV].ctl_name = parms->ctl_name;
1da177e4
LT		 255 }
256
1da177e4
LT		 257 t->dn_dev_vars[0].extra1 = (void *)dev;
258
3151a9ab 259 t->sysctl_header = register_sysctl_paths(dn_ctl_path, t->dn_dev_vars);
1da177e4
LT		 260 if (t->sysctl_header == NULL)
261 kfree(t);
262 else
263 parms->sysctl = t;
264}
265
266static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
267{
268 if (parms->sysctl) {
269 struct dn_dev_sysctl_table *t = parms->sysctl;
270 parms->sysctl = NULL;
271 unregister_sysctl_table(t->sysctl_header);
272 kfree(t);
273 }
274}
275
429eb0fa 276static int dn_forwarding_proc(ctl_table *table, int write,
1da177e4
LT		 277 struct file *filep,
278 void __user *buffer,
279 size_t *lenp, loff_t *ppos)
280{
281#ifdef CONFIG_DECNET_ROUTER
282 struct net_device *dev = table->extra1;
283 struct dn_dev *dn_db;
284 int err;
285 int tmp, old;
286
287 if (table->extra1 == NULL)
288 return -EINVAL;
289
290 dn_db = dev->dn_ptr;
291 old = dn_db->parms.forwarding;
292
293 err = proc_dointvec(table, write, filep, buffer, lenp, ppos);
294
295 if ((err >= 0) && write) {
296 if (dn_db->parms.forwarding < 0)
297 dn_db->parms.forwarding = 0;
298 if (dn_db->parms.forwarding > 2)
299 dn_db->parms.forwarding = 2;
300 /*
301 * What an ugly hack this is... its works, just. It
302 * would be nice if sysctl/proc were just that little
303 * bit more flexible so I don't have to write a special
304 * routine, or suffer hacks like this - SJW
305 */
306 tmp = dn_db->parms.forwarding;
307 dn_db->parms.forwarding = old;
308 if (dn_db->parms.down)
309 dn_db->parms.down(dev);
310 dn_db->parms.forwarding = tmp;
311 if (dn_db->parms.up)
312 dn_db->parms.up(dev);
313 }
314
315 return err;
316#else
317 return -EINVAL;
318#endif
319}
320
f221e726 321static int dn_forwarding_sysctl(ctl_table *table,
1da177e4 322 void __user *oldval, size_t __user *oldlenp,
1f29bcd7 323 void __user *newval, size_t newlen)
1da177e4
LT		 324{
325#ifdef CONFIG_DECNET_ROUTER
326 struct net_device *dev = table->extra1;
327 struct dn_dev *dn_db;
328 int value;
329
330 if (table->extra1 == NULL)
331 return -EINVAL;
332
333 dn_db = dev->dn_ptr;
334
335 if (newval && newlen) {
336 if (newlen != sizeof(int))
337 return -EINVAL;
338
339 if (get_user(value, (int __user *)newval))
340 return -EFAULT;
341 if (value < 0)
342 return -EINVAL;
343 if (value > 2)
344 return -EINVAL;
345
346 if (dn_db->parms.down)
347 dn_db->parms.down(dev);
348 dn_db->parms.forwarding = value;
349 if (dn_db->parms.up)
350 dn_db->parms.up(dev);
351 }
352
353 return 0;
354#else
355 return -EINVAL;
356#endif
357}
358
359#else /* CONFIG_SYSCTL */
360static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
361{
362}
363static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
364{
365}
366
367#endif /* CONFIG_SYSCTL */
368
369static inline __u16 mtu2blksize(struct net_device *dev)
370{
371 u32 blksize = dev->mtu;
372 if (blksize > 0xffff)
373 blksize = 0xffff;
374
375 if (dev->type == ARPHRD_ETHER ||
376 dev->type == ARPHRD_PPP ||
377 dev->type == ARPHRD_IPGRE ||
378 dev->type == ARPHRD_LOOPBACK)
379 blksize -= 2;
380
381 return (__u16)blksize;
382}
383
384static struct dn_ifaddr *dn_dev_alloc_ifa(void)
385{
386 struct dn_ifaddr *ifa;
387
0da974f4 388 ifa = kzalloc(sizeof(*ifa), GFP_KERNEL);
1da177e4
LT		 389
390 return ifa;
391}
392
393static __inline__ void dn_dev_free_ifa(struct dn_ifaddr *ifa)
394{
395 kfree(ifa);
396}
397
398static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr **ifap, int destroy)
399{
400 struct dn_ifaddr *ifa1 = *ifap;
401 unsigned char mac_addr[6];
402 struct net_device *dev = dn_db->dev;
403
404 ASSERT_RTNL();
405
406 *ifap = ifa1->ifa_next;
407
408 if (dn_db->dev->type == ARPHRD_ETHER) {
c4ea94ab 409 if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) {
1da177e4
LT		 410 dn_dn2eth(mac_addr, ifa1->ifa_local);
411 dev_mc_delete(dev, mac_addr, ETH_ALEN, 0);
412 }
413 }
414
b020b942 415 dn_ifaddr_notify(RTM_DELADDR, ifa1);
e041c683 416 blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1);
1da177e4
LT		 417 if (destroy) {
418 dn_dev_free_ifa(ifa1);
419
420 if (dn_db->ifa_list == NULL)
421 dn_dev_delete(dn_db->dev);
422 }
423}
424
425static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa)
426{
427 struct net_device *dev = dn_db->dev;
428 struct dn_ifaddr *ifa1;
429 unsigned char mac_addr[6];
430
431 ASSERT_RTNL();
432
429eb0fa 433 /* Check for duplicates */
1da177e4
LT		 434 for(ifa1 = dn_db->ifa_list; ifa1; ifa1 = ifa1->ifa_next) {
435 if (ifa1->ifa_local == ifa->ifa_local)
436 return -EEXIST;
437 }
438
439 if (dev->type == ARPHRD_ETHER) {
c4ea94ab 440 if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) {
1da177e4
LT		 441 dn_dn2eth(mac_addr, ifa->ifa_local);
442 dev_mc_add(dev, mac_addr, ETH_ALEN, 0);
1da177e4
LT		 443 }
444 }
445
446 ifa->ifa_next = dn_db->ifa_list;
447 dn_db->ifa_list = ifa;
448
b020b942 449 dn_ifaddr_notify(RTM_NEWADDR, ifa);
e041c683 450 blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa);
1da177e4
LT		 451
452 return 0;
453}
454
455static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa)
456{
457 struct dn_dev *dn_db = dev->dn_ptr;
458 int rv;
459
460 if (dn_db == NULL) {
461 int err;
462 dn_db = dn_dev_create(dev, &err);
463 if (dn_db == NULL)
464 return err;
465 }
466
467 ifa->ifa_dev = dn_db;
468
469 if (dev->flags & IFF_LOOPBACK)
470 ifa->ifa_scope = RT_SCOPE_HOST;
471
472 rv = dn_dev_insert_ifa(dn_db, ifa);
473 if (rv)
474 dn_dev_free_ifa(ifa);
475 return rv;
476}
477
478
479int dn_dev_ioctl(unsigned int cmd, void __user *arg)
480{
481 char buffer[DN_IFREQ_SIZE];
482 struct ifreq *ifr = (struct ifreq *)buffer;
483 struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr;
484 struct dn_dev *dn_db;
485 struct net_device *dev;
486 struct dn_ifaddr *ifa = NULL, **ifap = NULL;
487 int ret = 0;
488
489 if (copy_from_user(ifr, arg, DN_IFREQ_SIZE))
490 return -EFAULT;
491 ifr->ifr_name[IFNAMSIZ-1] = 0;
492
881d966b 493 dev_load(&init_net, ifr->ifr_name);
1da177e4
LT		 494
495 switch(cmd) {
496 case SIOCGIFADDR:
497 break;
498 case SIOCSIFADDR:
499 if (!capable(CAP_NET_ADMIN))
500 return -EACCES;
501 if (sdn->sdn_family != AF_DECnet)
502 return -EINVAL;
503 break;
504 default:
505 return -EINVAL;
506 }
507
508 rtnl_lock();
509
881d966b 510 if ((dev = __dev_get_by_name(&init_net, ifr->ifr_name)) == NULL) {
1da177e4
LT		 511 ret = -ENODEV;
512 goto done;
513 }
514
515 if ((dn_db = dev->dn_ptr) != NULL) {
516 for (ifap = &dn_db->ifa_list; (ifa=*ifap) != NULL; ifap = &ifa->ifa_next)
517 if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0)
518 break;
519 }
520
521 if (ifa == NULL && cmd != SIOCSIFADDR) {
522 ret = -EADDRNOTAVAIL;
523 goto done;
524 }
525
526 switch(cmd) {
527 case SIOCGIFADDR:
c4ea94ab 528 *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local;
1da177e4
LT		 529 goto rarok;
530
531 case SIOCSIFADDR:
532 if (!ifa) {
533 if ((ifa = dn_dev_alloc_ifa()) == NULL) {
534 ret = -ENOBUFS;
535 break;
536 }
537 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
538 } else {
539 if (ifa->ifa_local == dn_saddr2dn(sdn))
540 break;
541 dn_dev_del_ifa(dn_db, ifap, 0);
542 }
543
544 ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn);
545
546 ret = dn_dev_set_ifa(dev, ifa);
547 }
548done:
549 rtnl_unlock();
550
551 return ret;
552rarok:
553 if (copy_to_user(arg, ifr, DN_IFREQ_SIZE))
554 ret = -EFAULT;
555 goto done;
556}
557
558struct net_device *dn_dev_get_default(void)
559{
560 struct net_device *dev;
561 read_lock(&dndev_lock);
562 dev = decnet_default_device;
563 if (dev) {
564 if (dev->dn_ptr)
565 dev_hold(dev);
566 else
567 dev = NULL;
568 }
569 read_unlock(&dndev_lock);
570 return dev;
571}
572
573int dn_dev_set_default(struct net_device *dev, int force)
574{
575 struct net_device *old = NULL;
576 int rv = -EBUSY;
577 if (!dev->dn_ptr)
578 return -ENODEV;
579 write_lock(&dndev_lock);
580 if (force || decnet_default_device == NULL) {
581 old = decnet_default_device;
582 decnet_default_device = dev;
583 rv = 0;
584 }
585 write_unlock(&dndev_lock);
586 if (old)
6a57b2ee 587 dev_put(old);
1da177e4
LT		 588 return rv;
589}
590
591static void dn_dev_check_default(struct net_device *dev)
592{
593 write_lock(&dndev_lock);
594 if (dev == decnet_default_device) {
595 decnet_default_device = NULL;
596 } else {
597 dev = NULL;
598 }
599 write_unlock(&dndev_lock);
600 if (dev)
601 dev_put(dev);
602}
603
604static struct dn_dev *dn_dev_by_index(int ifindex)
605{
606 struct net_device *dev;
607 struct dn_dev *dn_dev = NULL;
881d966b 608 dev = dev_get_by_index(&init_net, ifindex);
1da177e4
LT		 609 if (dev) {
610 dn_dev = dev->dn_ptr;
611 dev_put(dev);
612 }
613
614 return dn_dev;
615}
616
ef7c79ed 617static const struct nla_policy dn_ifa_policy[IFA_MAX+1] = {
4a89c256
TG		 618 [IFA_ADDRESS] = { .type = NLA_U16 },
619 [IFA_LOCAL] = { .type = NLA_U16 },
620 [IFA_LABEL] = { .type = NLA_STRING,
621 .len = IFNAMSIZ - 1 },
622};
623
624static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1da177e4 625{
3b1e0a65 626 struct net *net = sock_net(skb->sk);
4a89c256 627 struct nlattr *tb[IFA_MAX+1];
1da177e4 628 struct dn_dev *dn_db;
4a89c256 629 struct ifaddrmsg *ifm;
1da177e4 630 struct dn_ifaddr *ifa, **ifap;
b854272b
DL		 631 int err = -EINVAL;
632
633 if (net != &init_net)
634 goto errout;
4a89c256
TG		 635
636 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
637 if (err < 0)
638 goto errout;
1da177e4 639
3ccd8624 640 err = -ENODEV;
4a89c256 641 ifm = nlmsg_data(nlh);
1da177e4 642 if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL)
4a89c256
TG		 643 goto errout;
644
3ccd8624 645 err = -EADDRNOTAVAIL;
4a89c256
TG		 646 for (ifap = &dn_db->ifa_list; (ifa = *ifap); ifap = &ifa->ifa_next) {
647 if (tb[IFA_LOCAL] &&
648 nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2))
649 continue;
1da177e4 650
4a89c256 651 if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label))
1da177e4
LT		 652 continue;
653
654 dn_dev_del_ifa(dn_db, ifap, 1);
655 return 0;
656 }
657
4a89c256
TG		 658errout:
659 return err;
1da177e4
LT		 660}
661
4a89c256 662static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1da177e4 663{
3b1e0a65 664 struct net *net = sock_net(skb->sk);
4a89c256 665 struct nlattr *tb[IFA_MAX+1];
1da177e4
LT		 666 struct net_device *dev;
667 struct dn_dev *dn_db;
4a89c256 668 struct ifaddrmsg *ifm;
1da177e4 669 struct dn_ifaddr *ifa;
4a89c256
TG		 670 int err;
671
b854272b
DL		 672 if (net != &init_net)
673 return -EINVAL;
674
4a89c256
TG		 675 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
676 if (err < 0)
677 return err;
1da177e4 678
4a89c256 679 if (tb[IFA_LOCAL] == NULL)
1da177e4
LT		 680 return -EINVAL;
681
4a89c256 682 ifm = nlmsg_data(nlh);
881d966b 683 if ((dev = __dev_get_by_index(&init_net, ifm->ifa_index)) == NULL)
1da177e4
LT		 684 return -ENODEV;
685
686 if ((dn_db = dev->dn_ptr) == NULL) {
1da177e4
LT		 687 dn_db = dn_dev_create(dev, &err);
688 if (!dn_db)
689 return err;
690 }
429eb0fa 691
1da177e4
LT		 692 if ((ifa = dn_dev_alloc_ifa()) == NULL)
693 return -ENOBUFS;
694
4a89c256
TG		 695 if (tb[IFA_ADDRESS] == NULL)
696 tb[IFA_ADDRESS] = tb[IFA_LOCAL];
697
698 ifa->ifa_local = nla_get_le16(tb[IFA_LOCAL]);
699 ifa->ifa_address = nla_get_le16(tb[IFA_ADDRESS]);
1da177e4
LT		 700 ifa->ifa_flags = ifm->ifa_flags;
701 ifa->ifa_scope = ifm->ifa_scope;
702 ifa->ifa_dev = dn_db;
4a89c256
TG		 703
704 if (tb[IFA_LABEL])
705 nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ);
1da177e4
LT		 706 else
707 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
708
4a89c256
TG		 709 err = dn_dev_insert_ifa(dn_db, ifa);
710 if (err)
1da177e4 711 dn_dev_free_ifa(ifa);
4a89c256
TG		 712
713 return err;
1da177e4
LT		 714}
715
a6f01cac
TG		 716static inline size_t dn_ifaddr_nlmsg_size(void)
717{
718 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
719 + nla_total_size(IFNAMSIZ) /* IFA_LABEL */
720 + nla_total_size(2) /* IFA_ADDRESS */
721 + nla_total_size(2); /* IFA_LOCAL */
722}
723
4a89c256
TG		 724static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa,
725 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4
LT		 726{
727 struct ifaddrmsg *ifm;
728 struct nlmsghdr *nlh;
1da177e4 729
4a89c256
TG		 730 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*ifm), flags);
731 if (nlh == NULL)
26932566 732 return -EMSGSIZE;
1da177e4 733
4a89c256 734 ifm = nlmsg_data(nlh);
1da177e4
LT		 735 ifm->ifa_family = AF_DECnet;
736 ifm->ifa_prefixlen = 16;
737 ifm->ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT;
738 ifm->ifa_scope = ifa->ifa_scope;
739 ifm->ifa_index = ifa->ifa_dev->dev->ifindex;
4a89c256 740
1da177e4 741 if (ifa->ifa_address)
4a89c256 742 NLA_PUT_LE16(skb, IFA_ADDRESS, ifa->ifa_address);
1da177e4 743 if (ifa->ifa_local)
4a89c256 744 NLA_PUT_LE16(skb, IFA_LOCAL, ifa->ifa_local);
1da177e4 745 if (ifa->ifa_label[0])
4a89c256 746 NLA_PUT_STRING(skb, IFA_LABEL, ifa->ifa_label);
1da177e4 747
4a89c256
TG		 748 return nlmsg_end(skb, nlh);
749
750nla_put_failure:
26932566
PM		 751 nlmsg_cancel(skb, nlh);
752 return -EMSGSIZE;
1da177e4
LT		 753}
754
b020b942 755static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa)
1da177e4
LT		 756{
757 struct sk_buff *skb;
dc738dd8 758 int err = -ENOBUFS;
1da177e4 759
a6f01cac 760 skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL);
dc738dd8
TG		 761 if (skb == NULL)
762 goto errout;
763
4a89c256 764 err = dn_nl_fill_ifaddr(skb, ifa, 0, 0, event, 0);
26932566
PM		 765 if (err < 0) {
766 /* -EMSGSIZE implies BUG in dn_ifaddr_nlmsg_size() */
767 WARN_ON(err == -EMSGSIZE);
768 kfree_skb(skb);
769 goto errout;
770 }
1ce85fe4
PNA		 771 rtnl_notify(skb, &init_net, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL);
772 return;
dc738dd8
TG		 773errout:
774 if (err < 0)
97c53cac 775 rtnl_set_sk_err(&init_net, RTNLGRP_DECnet_IFADDR, err);
1da177e4
LT		 776}
777
4a89c256 778static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4 779{
3b1e0a65 780 struct net *net = sock_net(skb->sk);
4a89c256 781 int idx, dn_idx = 0, skip_ndevs, skip_naddr;
1da177e4
LT		 782 struct net_device *dev;
783 struct dn_dev *dn_db;
784 struct dn_ifaddr *ifa;
785
b854272b
DL		 786 if (net != &init_net)
787 return 0;
788
4a89c256
TG		 789 skip_ndevs = cb->args[0];
790 skip_naddr = cb->args[1];
791
7562f876 792 idx = 0;
881d966b 793 for_each_netdev(&init_net, dev) {
4a89c256 794 if (idx < skip_ndevs)
7562f876 795 goto cont;
4a89c256
TG		 796 else if (idx > skip_ndevs) {
797 /* Only skip over addresses for first dev dumped
798 * in this iteration (idx == skip_ndevs) */
799 skip_naddr = 0;
800 }
801
1da177e4 802 if ((dn_db = dev->dn_ptr) == NULL)
7562f876 803 goto cont;
1da177e4 804
4a89c256
TG		 805 for (ifa = dn_db->ifa_list, dn_idx = 0; ifa;
806 ifa = ifa->ifa_next, dn_idx++) {
807 if (dn_idx < skip_naddr)
a2221f30 808 continue;
1da177e4 809
4a89c256
TG		 810 if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid,
811 cb->nlh->nlmsg_seq, RTM_NEWADDR,
812 NLM_F_MULTI) < 0)
1da177e4
LT		 813 goto done;
814 }
7562f876
PE		 815cont:
816 idx++;
1da177e4
LT		 817 }
818done:
1da177e4
LT		 819 cb->args[0] = idx;
820 cb->args[1] = dn_idx;
821
822 return skb->len;
823}
824
c4ea94ab 825static int dn_dev_get_first(struct net_device *dev, __le16 *addr)
1da177e4
LT		 826{
827 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
828 struct dn_ifaddr *ifa;
829 int rv = -ENODEV;
830 if (dn_db == NULL)
831 goto out;
832 ifa = dn_db->ifa_list;
833 if (ifa != NULL) {
834 *addr = ifa->ifa_local;
835 rv = 0;
836 }
837out:
838 return rv;
839}
840
429eb0fa 841/*
1da177e4
LT		 842 * Find a default address to bind to.
843 *
844 * This is one of those areas where the initial VMS concepts don't really
845 * map onto the Linux concepts, and since we introduced multiple addresses
846 * per interface we have to cope with slightly odd ways of finding out what
847 * "our address" really is. Mostly it's not a problem; for this we just guess
848 * a sensible default. Eventually the routing code will take care of all the
849 * nasties for us I hope.
850 */
c4ea94ab 851int dn_dev_bind_default(__le16 *addr)
1da177e4
LT		 852{
853 struct net_device *dev;
854 int rv;
855 dev = dn_dev_get_default();
856last_chance:
857 if (dev) {
858 read_lock(&dev_base_lock);
859 rv = dn_dev_get_first(dev, addr);
860 read_unlock(&dev_base_lock);
861 dev_put(dev);
2774c7ab 862 if (rv == 0 || dev == init_net.loopback_dev)
1da177e4
LT		 863 return rv;
864 }
2774c7ab 865 dev = init_net.loopback_dev;
1da177e4
LT		 866 dev_hold(dev);
867 goto last_chance;
868}
869
870static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa)
871{
429eb0fa
YH		 872 struct endnode_hello_message *msg;
873 struct sk_buff *skb = NULL;
874 __le16 *pktlen;
1da177e4
LT		 875 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
876
429eb0fa 877 if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL)
1da177e4
LT		 878 return;
879
429eb0fa 880 skb->dev = dev;
1da177e4 881
429eb0fa 882 msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg));
1da177e4 883
429eb0fa
YH		 884 msg->msgflg = 0x0D;
885 memcpy(msg->tiver, dn_eco_version, 3);
1da177e4 886 dn_dn2eth(msg->id, ifa->ifa_local);
429eb0fa 887 msg->iinfo = DN_RT_INFO_ENDN;
c4106aa8 888 msg->blksize = cpu_to_le16(mtu2blksize(dev));
429eb0fa
YH		 889 msg->area = 0x00;
890 memset(msg->seed, 0, 8);
891 memcpy(msg->neighbor, dn_hiord, ETH_ALEN);
1da177e4
LT		 892
893 if (dn_db->router) {
894 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
895 dn_dn2eth(msg->neighbor, dn->addr);
896 }
897
c4106aa8 898 msg->timer = cpu_to_le16((unsigned short)dn_db->parms.t3);
429eb0fa
YH		 899 msg->mpd = 0x00;
900 msg->datalen = 0x02;
901 memset(msg->data, 0xAA, 2);
902
903 pktlen = (__le16 *)skb_push(skb,2);
c4106aa8 904 *pktlen = cpu_to_le16(skb->len - 2);
1da177e4 905
c1d2bbe1 906 skb_reset_network_header(skb);
1da177e4
LT		 907
908 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id);
909}
910
911
912#define DRDELAY (5 * HZ)
913
914static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa)
915{
916 /* First check time since device went up */
917 if ((jiffies - dn_db->uptime) < DRDELAY)
918 return 0;
919
920 /* If there is no router, then yes... */
921 if (!dn_db->router)
922 return 1;
923
924 /* otherwise only if we have a higher priority or.. */
925 if (dn->priority < dn_db->parms.priority)
926 return 1;
927
928 /* if we have equal priority and a higher node number */
929 if (dn->priority != dn_db->parms.priority)
930 return 0;
931
c4106aa8 932 if (le16_to_cpu(dn->addr) < le16_to_cpu(ifa->ifa_local))
1da177e4
LT		 933 return 1;
934
935 return 0;
936}
937
938static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa)
939{
940 int n;
941 struct dn_dev *dn_db = dev->dn_ptr;
942 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
943 struct sk_buff *skb;
944 size_t size;
945 unsigned char *ptr;
946 unsigned char *i1, *i2;
c4ea94ab 947 __le16 *pktlen;
1da177e4
LT		 948 char *src;
949
950 if (mtu2blksize(dev) < (26 + 7))
951 return;
952
953 n = mtu2blksize(dev) - 26;
954 n /= 7;
955
956 if (n > 32)
957 n = 32;
958
959 size = 2 + 26 + 7 * n;
960
961 if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL)
962 return;
963
964 skb->dev = dev;
965 ptr = skb_put(skb, size);
966
967 *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH;
968 *ptr++ = 2; /* ECO */
969 *ptr++ = 0;
970 *ptr++ = 0;
971 dn_dn2eth(ptr, ifa->ifa_local);
972 src = ptr;
973 ptr += ETH_ALEN;
429eb0fa 974 *ptr++ = dn_db->parms.forwarding == 1 ?
1da177e4 975 DN_RT_INFO_L1RT : DN_RT_INFO_L2RT;
c4106aa8 976 *((__le16 *)ptr) = cpu_to_le16(mtu2blksize(dev));
1da177e4 977 ptr += 2;
429eb0fa 978 *ptr++ = dn_db->parms.priority; /* Priority */
1da177e4 979 *ptr++ = 0; /* Area: Reserved */
c4106aa8 980 *((__le16 *)ptr) = cpu_to_le16((unsigned short)dn_db->parms.t3);
1da177e4
LT		 981 ptr += 2;
982 *ptr++ = 0; /* MPD: Reserved */
983 i1 = ptr++;
984 memset(ptr, 0, 7); /* Name: Reserved */
985 ptr += 7;
986 i2 = ptr++;
987
988 n = dn_neigh_elist(dev, ptr, n);
989
990 *i2 = 7 * n;
991 *i1 = 8 + *i2;
992
993 skb_trim(skb, (27 + *i2));
994
c4ea94ab 995 pktlen = (__le16 *)skb_push(skb, 2);
c4106aa8 996 *pktlen = cpu_to_le16(skb->len - 2);
1da177e4 997
c1d2bbe1 998 skb_reset_network_header(skb);
1da177e4
LT		 999
1000 if (dn_am_i_a_router(dn, dn_db, ifa)) {
1001 struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC);
1002 if (skb2) {
1003 dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src);
1004 }
1005 }
1006
1007 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
1008}
1009
1010static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa)
1011{
1012 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
1013
1014 if (dn_db->parms.forwarding == 0)
1015 dn_send_endnode_hello(dev, ifa);
1016 else
1017 dn_send_router_hello(dev, ifa);
1018}
1019
1020static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa)
1021{
1022 int tdlen = 16;
1023 int size = dev->hard_header_len + 2 + 4 + tdlen;
1024 struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC);
1025 int i;
1026 unsigned char *ptr;
1027 char src[ETH_ALEN];
1028
1029 if (skb == NULL)
1030 return ;
1031
1032 skb->dev = dev;
1033 skb_push(skb, dev->hard_header_len);
1034 ptr = skb_put(skb, 2 + 4 + tdlen);
1035
1036 *ptr++ = DN_RT_PKT_HELO;
c4ea94ab 1037 *((__le16 *)ptr) = ifa->ifa_local;
1da177e4
LT		 1038 ptr += 2;
1039 *ptr++ = tdlen;
1040
1041 for(i = 0; i < tdlen; i++)
1042 *ptr++ = 0252;
1043
1044 dn_dn2eth(src, ifa->ifa_local);
1045 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
1046}
1047
1048static int dn_eth_up(struct net_device *dev)
1049{
1050 struct dn_dev *dn_db = dev->dn_ptr;
1051
1052 if (dn_db->parms.forwarding == 0)
1053 dev_mc_add(dev, dn_rt_all_end_mcast, ETH_ALEN, 0);
1054 else
1055 dev_mc_add(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0);
1056
1da177e4
LT		 1057 dn_db->use_long = 1;
1058
1059 return 0;
1060}
1061
1062static void dn_eth_down(struct net_device *dev)
1063{
1064 struct dn_dev *dn_db = dev->dn_ptr;
1065
1066 if (dn_db->parms.forwarding == 0)
1067 dev_mc_delete(dev, dn_rt_all_end_mcast, ETH_ALEN, 0);
1068 else
1069 dev_mc_delete(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0);
1070}
1071
1072static void dn_dev_set_timer(struct net_device *dev);
1073
1074static void dn_dev_timer_func(unsigned long arg)
1075{
1076 struct net_device *dev = (struct net_device *)arg;
1077 struct dn_dev *dn_db = dev->dn_ptr;
1078 struct dn_ifaddr *ifa;
1079
1080 if (dn_db->t3 <= dn_db->parms.t2) {
1081 if (dn_db->parms.timer3) {
1082 for(ifa = dn_db->ifa_list; ifa; ifa = ifa->ifa_next) {
1083 if (!(ifa->ifa_flags & IFA_F_SECONDARY))
1084 dn_db->parms.timer3(dev, ifa);
1085 }
1086 }
1087 dn_db->t3 = dn_db->parms.t3;
1088 } else {
1089 dn_db->t3 -= dn_db->parms.t2;
1090 }
1091
1092 dn_dev_set_timer(dev);
1093}
1094
1095static void dn_dev_set_timer(struct net_device *dev)
1096{
1097 struct dn_dev *dn_db = dev->dn_ptr;
1098
1099 if (dn_db->parms.t2 > dn_db->parms.t3)
1100 dn_db->parms.t2 = dn_db->parms.t3;
1101
1102 dn_db->timer.data = (unsigned long)dev;
1103 dn_db->timer.function = dn_dev_timer_func;
1104 dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ);
1105
1106 add_timer(&dn_db->timer);
1107}
1108
5eaa65b2 1109static struct dn_dev *dn_dev_create(struct net_device *dev, int *err)
1da177e4
LT		 1110{
1111 int i;
1112 struct dn_dev_parms *p = dn_dev_list;
1113 struct dn_dev *dn_db;
1114
1115 for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) {
1116 if (p->type == dev->type)
1117 break;
1118 }
1119
1120 *err = -ENODEV;
1121 if (i == DN_DEV_LIST_SIZE)
1122 return NULL;
1123
1124 *err = -ENOBUFS;
0da974f4 1125 if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL)
1da177e4
LT		 1126 return NULL;
1127
1da177e4
LT		 1128 memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms));
1129 smp_wmb();
1130 dev->dn_ptr = dn_db;
1131 dn_db->dev = dev;
1132 init_timer(&dn_db->timer);
1133
1134 dn_db->uptime = jiffies;
95743deb
EB		 1135
1136 dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table);
1137 if (!dn_db->neigh_parms) {
1138 dev->dn_ptr = NULL;
1139 kfree(dn_db);
1140 return NULL;
1141 }
1142
1da177e4
LT		 1143 if (dn_db->parms.up) {
1144 if (dn_db->parms.up(dev) < 0) {
95743deb 1145 neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
1da177e4
LT		 1146 dev->dn_ptr = NULL;
1147 kfree(dn_db);
1148 return NULL;
1149 }
1150 }
1151
1da177e4
LT		 1152 dn_dev_sysctl_register(dev, &dn_db->parms);
1153
1154 dn_dev_set_timer(dev);
1155
1156 *err = 0;
1157 return dn_db;
1158}
1159
1160
1161/*
1162 * This processes a device up event. We only start up
1163 * the loopback device & ethernet devices with correct
1164 * MAC addreses automatically. Others must be started
1165 * specifically.
1166 *
1167 * FIXME: How should we configure the loopback address ? If we could dispense
1168 * with using decnet_address here and for autobind, it will be one less thing
1169 * for users to worry about setting up.
1170 */
1171
1172void dn_dev_up(struct net_device *dev)
1173{
1174 struct dn_ifaddr *ifa;
c4ea94ab 1175 __le16 addr = decnet_address;
1da177e4
LT		 1176 int maybe_default = 0;
1177 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
1178
1179 if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK))
1180 return;
1181
1182 /*
1183 * Need to ensure that loopback device has a dn_db attached to it
1184 * to allow creation of neighbours against it, even though it might
1185 * not have a local address of its own. Might as well do the same for
1186 * all autoconfigured interfaces.
1187 */
1188 if (dn_db == NULL) {
1189 int err;
1190 dn_db = dn_dev_create(dev, &err);
1191 if (dn_db == NULL)
1192 return;
1193 }
1194
1195 if (dev->type == ARPHRD_ETHER) {
1196 if (memcmp(dev->dev_addr, dn_hiord, 4) != 0)
1197 return;
c4ea94ab 1198 addr = dn_eth2dn(dev->dev_addr);
1da177e4
LT		 1199 maybe_default = 1;
1200 }
1201
1202 if (addr == 0)
1203 return;
1204
1205 if ((ifa = dn_dev_alloc_ifa()) == NULL)
1206 return;
1207
1208 ifa->ifa_local = ifa->ifa_address = addr;
1209 ifa->ifa_flags = 0;
1210 ifa->ifa_scope = RT_SCOPE_UNIVERSE;
1211 strcpy(ifa->ifa_label, dev->name);
1212
1213 dn_dev_set_ifa(dev, ifa);
1214
1215 /*
1216 * Automagically set the default device to the first automatically
1217 * configured ethernet card in the system.
1218 */
1219 if (maybe_default) {
1220 dev_hold(dev);
1221 if (dn_dev_set_default(dev, 0))
1222 dev_put(dev);
1223 }
1224}
1225
1226static void dn_dev_delete(struct net_device *dev)
1227{
1228 struct dn_dev *dn_db = dev->dn_ptr;
1229
1230 if (dn_db == NULL)
1231 return;
1232
1233 del_timer_sync(&dn_db->timer);
1234 dn_dev_sysctl_unregister(&dn_db->parms);
1235 dn_dev_check_default(dev);
1236 neigh_ifdown(&dn_neigh_table, dev);
1237
1238 if (dn_db->parms.down)
1239 dn_db->parms.down(dev);
1240
1241 dev->dn_ptr = NULL;
1242
1243 neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
1244 neigh_ifdown(&dn_neigh_table, dev);
1245
1246 if (dn_db->router)
1247 neigh_release(dn_db->router);
1248 if (dn_db->peer)
1249 neigh_release(dn_db->peer);
1250
1251 kfree(dn_db);
1252}
1253
1254void dn_dev_down(struct net_device *dev)
1255{
1256 struct dn_dev *dn_db = dev->dn_ptr;
1257 struct dn_ifaddr *ifa;
1258
1259 if (dn_db == NULL)
1260 return;
1261
1262 while((ifa = dn_db->ifa_list) != NULL) {
1263 dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0);
1264 dn_dev_free_ifa(ifa);
1265 }
1266
1267 dn_dev_delete(dev);
1268}
1269
1270void dn_dev_init_pkt(struct sk_buff *skb)
1271{
1272 return;
1273}
1274
1275void dn_dev_veri_pkt(struct sk_buff *skb)
1276{
1277 return;
1278}
1279
1280void dn_dev_hello(struct sk_buff *skb)
1281{
1282 return;
1283}
1284
1285void dn_dev_devices_off(void)
1286{
1287 struct net_device *dev;
1288
1289 rtnl_lock();
881d966b 1290 for_each_netdev(&init_net, dev)
1da177e4
LT		 1291 dn_dev_down(dev);
1292 rtnl_unlock();
1293
1294}
1295
1296void dn_dev_devices_on(void)
1297{
1298 struct net_device *dev;
1299
1300 rtnl_lock();
881d966b 1301 for_each_netdev(&init_net, dev) {
1da177e4
LT		 1302 if (dev->flags & IFF_UP)
1303 dn_dev_up(dev);
1304 }
1305 rtnl_unlock();
1306}
1307
1308int register_dnaddr_notifier(struct notifier_block *nb)
1309{
e041c683 1310 return blocking_notifier_chain_register(&dnaddr_chain, nb);
1da177e4
LT		 1311}
1312
1313int unregister_dnaddr_notifier(struct notifier_block *nb)
1314{
e041c683 1315 return blocking_notifier_chain_unregister(&dnaddr_chain, nb);
1da177e4
LT		 1316}
1317
1318#ifdef CONFIG_PROC_FS
7562f876 1319static inline int is_dn_dev(struct net_device *dev)
1da177e4 1320{
7562f876 1321 return dev->dn_ptr != NULL;
1da177e4
LT		 1322}
1323
7562f876 1324static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos)
8521c27e 1325 __acquires(&dev_base_lock)
1da177e4 1326{
7562f876 1327 int i;
1da177e4
LT		 1328 struct net_device *dev;
1329
7562f876 1330 read_lock(&dev_base_lock);
1da177e4 1331
7562f876
PE		 1332 if (*pos == 0)
1333 return SEQ_START_TOKEN;
1334
1335 i = 1;
881d966b 1336 for_each_netdev(&init_net, dev) {
7562f876
PE		 1337 if (!is_dn_dev(dev))
1338 continue;
1339
1340 if (i++ == *pos)
1341 return dev;
1da177e4 1342 }
7562f876
PE		 1343
1344 return NULL;
1da177e4
LT		 1345}
1346
1347static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1348{
7562f876 1349 struct net_device *dev;
1da177e4 1350
1da177e4 1351 ++*pos;
7562f876
PE		 1352
1353 dev = (struct net_device *)v;
1354 if (v == SEQ_START_TOKEN)
881d966b 1355 dev = net_device_entry(&init_net.dev_base_head);
7562f876 1356
881d966b 1357 for_each_netdev_continue(&init_net, dev) {
7562f876
PE		 1358 if (!is_dn_dev(dev))
1359 continue;
1360
1361 return dev;
1362 }
1363
1364 return NULL;
1da177e4
LT		 1365}
1366
1367static void dn_dev_seq_stop(struct seq_file *seq, void *v)
8521c27e 1368 __releases(&dev_base_lock)
1da177e4 1369{
7562f876 1370 read_unlock(&dev_base_lock);
1da177e4
LT		 1371}
1372
1373static char *dn_type2asc(char type)
1374{
1375 switch(type) {
1376 case DN_DEV_BCAST:
1377 return "B";
1378 case DN_DEV_UCAST:
1379 return "U";
1380 case DN_DEV_MPOINT:
1381 return "M";
1382 }
1383
1384 return "?";
1385}
1386
1387static int dn_dev_seq_show(struct seq_file *seq, void *v)
1388{
1389 if (v == SEQ_START_TOKEN)
429eb0fa 1390 seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer\n");
1da177e4
LT		 1391 else {
1392 struct net_device *dev = v;
1393 char peer_buf[DN_ASCBUF_LEN];
1394 char router_buf[DN_ASCBUF_LEN];
1395 struct dn_dev *dn_db = dev->dn_ptr;
1396
429eb0fa 1397 seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu"
1da177e4 1398 " %04hu %03d %02x %-10s %-7s %-7s\n",
429eb0fa
YH		 1399 dev->name ? dev->name : "???",
1400 dn_type2asc(dn_db->parms.mode),
1401 0, 0,
1da177e4
LT		 1402 dn_db->t3, dn_db->parms.t3,
1403 mtu2blksize(dev),
1404 dn_db->parms.priority,
1405 dn_db->parms.state, dn_db->parms.name,
c4106aa8
HH		 1406 dn_db->router ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->router->primary_key), router_buf) : "",
1407 dn_db->peer ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->peer->primary_key), peer_buf) : "");
1da177e4
LT		 1408 }
1409 return 0;
1410}
1411
56b3d975 1412static const struct seq_operations dn_dev_seq_ops = {
1da177e4
LT		 1413 .start = dn_dev_seq_start,
1414 .next = dn_dev_seq_next,
1415 .stop = dn_dev_seq_stop,
1416 .show = dn_dev_seq_show,
1417};
1418
1419static int dn_dev_seq_open(struct inode *inode, struct file *file)
1420{
1421 return seq_open(file, &dn_dev_seq_ops);
1422}
1423
9a32144e 1424static const struct file_operations dn_dev_seq_fops = {
1da177e4
LT		 1425 .owner = THIS_MODULE,
1426 .open = dn_dev_seq_open,
1427 .read = seq_read,
1428 .llseek = seq_lseek,
1429 .release = seq_release,
1430};
1431
1432#endif /* CONFIG_PROC_FS */
1433
4e058063 1434static int addr[2];
1da177e4
LT		 1435module_param_array(addr, int, NULL, 0444);
1436MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node");
1437
1438void __init dn_dev_init(void)
1439{
429eb0fa
YH		 1440 if (addr[0] > 63 || addr[0] < 0) {
1441 printk(KERN_ERR "DECnet: Area must be between 0 and 63");
1442 return;
1443 }
1da177e4 1444
429eb0fa
YH		 1445 if (addr[1] > 1023 || addr[1] < 0) {
1446 printk(KERN_ERR "DECnet: Node must be between 0 and 1023");
1447 return;
1448 }
1da177e4 1449
c4106aa8 1450 decnet_address = cpu_to_le16((addr[0] << 10) | addr[1]);
1da177e4
LT		 1451
1452 dn_dev_devices_on();
1453
fa34ddd7
TG		 1454 rtnl_register(PF_DECnet, RTM_NEWADDR, dn_nl_newaddr, NULL);
1455 rtnl_register(PF_DECnet, RTM_DELADDR, dn_nl_deladdr, NULL);
1456 rtnl_register(PF_DECnet, RTM_GETADDR, NULL, dn_nl_dump_ifaddr);
1da177e4 1457
457c4cbc 1458 proc_net_fops_create(&init_net, "decnet_dev", S_IRUGO, &dn_dev_seq_fops);
1da177e4
LT		 1459
1460#ifdef CONFIG_SYSCTL
1461 {
1462 int i;
1463 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1464 dn_dev_sysctl_register(NULL, &dn_dev_list[i]);
1465 }
1466#endif /* CONFIG_SYSCTL */
1467}
1468
1469void __exit dn_dev_cleanup(void)
1470{
1da177e4
LT		 1471#ifdef CONFIG_SYSCTL
1472 {
1473 int i;
1474 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1475 dn_dev_sysctl_unregister(&dn_dev_list[i]);
1476 }
1477#endif /* CONFIG_SYSCTL */
1478
457c4cbc 1479 proc_net_remove(&init_net, "decnet_dev");
1da177e4
LT		 1480
1481 dn_dev_devices_off();
1482}
Linux kernel - Deliverables
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