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net: use net_eq to compare nets
[GitHub/mt8127/android_kernel_alcatel_ttab.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 70
e5c140a3 71static DEFINE_SPINLOCK(dndev_lock);
1da177e4 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
8d65af78 167static int dn_forwarding_proc(ctl_table *, int,
1da177e4 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 void __user *buffer,
278 size_t *lenp, loff_t *ppos)
279{
280#ifdef CONFIG_DECNET_ROUTER
281 struct net_device *dev = table->extra1;
282 struct dn_dev *dn_db;
283 int err;
284 int tmp, old;
285
286 if (table->extra1 == NULL)
287 return -EINVAL;
288
289 dn_db = dev->dn_ptr;
290 old = dn_db->parms.forwarding;
291
8d65af78 292 err = proc_dointvec(table, write, buffer, lenp, ppos);
1da177e4
LT		 293
294 if ((err >= 0) && write) {
295 if (dn_db->parms.forwarding < 0)
296 dn_db->parms.forwarding = 0;
297 if (dn_db->parms.forwarding > 2)
298 dn_db->parms.forwarding = 2;
299 /*
300 * What an ugly hack this is... its works, just. It
301 * would be nice if sysctl/proc were just that little
302 * bit more flexible so I don't have to write a special
303 * routine, or suffer hacks like this - SJW
304 */
305 tmp = dn_db->parms.forwarding;
306 dn_db->parms.forwarding = old;
307 if (dn_db->parms.down)
308 dn_db->parms.down(dev);
309 dn_db->parms.forwarding = tmp;
310 if (dn_db->parms.up)
311 dn_db->parms.up(dev);
312 }
313
314 return err;
315#else
316 return -EINVAL;
317#endif
318}
319
f221e726 320static int dn_forwarding_sysctl(ctl_table *table,
1da177e4 321 void __user *oldval, size_t __user *oldlenp,
1f29bcd7 322 void __user *newval, size_t newlen)
1da177e4
LT		 323{
324#ifdef CONFIG_DECNET_ROUTER
325 struct net_device *dev = table->extra1;
326 struct dn_dev *dn_db;
327 int value;
328
329 if (table->extra1 == NULL)
330 return -EINVAL;
331
332 dn_db = dev->dn_ptr;
333
334 if (newval && newlen) {
335 if (newlen != sizeof(int))
336 return -EINVAL;
337
338 if (get_user(value, (int __user *)newval))
339 return -EFAULT;
340 if (value < 0)
341 return -EINVAL;
342 if (value > 2)
343 return -EINVAL;
344
345 if (dn_db->parms.down)
346 dn_db->parms.down(dev);
347 dn_db->parms.forwarding = value;
348 if (dn_db->parms.up)
349 dn_db->parms.up(dev);
350 }
351
352 return 0;
353#else
354 return -EINVAL;
355#endif
356}
357
358#else /* CONFIG_SYSCTL */
359static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
360{
361}
362static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
363{
364}
365
366#endif /* CONFIG_SYSCTL */
367
368static inline __u16 mtu2blksize(struct net_device *dev)
369{
370 u32 blksize = dev->mtu;
371 if (blksize > 0xffff)
372 blksize = 0xffff;
373
374 if (dev->type == ARPHRD_ETHER ||
375 dev->type == ARPHRD_PPP ||
376 dev->type == ARPHRD_IPGRE ||
377 dev->type == ARPHRD_LOOPBACK)
378 blksize -= 2;
379
380 return (__u16)blksize;
381}
382
383static struct dn_ifaddr *dn_dev_alloc_ifa(void)
384{
385 struct dn_ifaddr *ifa;
386
0da974f4 387 ifa = kzalloc(sizeof(*ifa), GFP_KERNEL);
1da177e4
LT		 388
389 return ifa;
390}
391
392static __inline__ void dn_dev_free_ifa(struct dn_ifaddr *ifa)
393{
394 kfree(ifa);
395}
396
397static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr **ifap, int destroy)
398{
399 struct dn_ifaddr *ifa1 = *ifap;
400 unsigned char mac_addr[6];
401 struct net_device *dev = dn_db->dev;
402
403 ASSERT_RTNL();
404
405 *ifap = ifa1->ifa_next;
406
407 if (dn_db->dev->type == ARPHRD_ETHER) {
c4ea94ab 408 if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) {
1da177e4
LT		 409 dn_dn2eth(mac_addr, ifa1->ifa_local);
410 dev_mc_delete(dev, mac_addr, ETH_ALEN, 0);
411 }
412 }
413
b020b942 414 dn_ifaddr_notify(RTM_DELADDR, ifa1);
e041c683 415 blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1);
1da177e4
LT		 416 if (destroy) {
417 dn_dev_free_ifa(ifa1);
418
419 if (dn_db->ifa_list == NULL)
420 dn_dev_delete(dn_db->dev);
421 }
422}
423
424static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa)
425{
426 struct net_device *dev = dn_db->dev;
427 struct dn_ifaddr *ifa1;
428 unsigned char mac_addr[6];
429
430 ASSERT_RTNL();
431
429eb0fa 432 /* Check for duplicates */
1da177e4
LT		 433 for(ifa1 = dn_db->ifa_list; ifa1; ifa1 = ifa1->ifa_next) {
434 if (ifa1->ifa_local == ifa->ifa_local)
435 return -EEXIST;
436 }
437
438 if (dev->type == ARPHRD_ETHER) {
c4ea94ab 439 if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) {
1da177e4
LT		 440 dn_dn2eth(mac_addr, ifa->ifa_local);
441 dev_mc_add(dev, mac_addr, ETH_ALEN, 0);
1da177e4
LT		 442 }
443 }
444
445 ifa->ifa_next = dn_db->ifa_list;
446 dn_db->ifa_list = ifa;
447
b020b942 448 dn_ifaddr_notify(RTM_NEWADDR, ifa);
e041c683 449 blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa);
1da177e4
LT		 450
451 return 0;
452}
453
454static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa)
455{
456 struct dn_dev *dn_db = dev->dn_ptr;
457 int rv;
458
459 if (dn_db == NULL) {
460 int err;
461 dn_db = dn_dev_create(dev, &err);
462 if (dn_db == NULL)
463 return err;
464 }
465
466 ifa->ifa_dev = dn_db;
467
468 if (dev->flags & IFF_LOOPBACK)
469 ifa->ifa_scope = RT_SCOPE_HOST;
470
471 rv = dn_dev_insert_ifa(dn_db, ifa);
472 if (rv)
473 dn_dev_free_ifa(ifa);
474 return rv;
475}
476
477
478int dn_dev_ioctl(unsigned int cmd, void __user *arg)
479{
480 char buffer[DN_IFREQ_SIZE];
481 struct ifreq *ifr = (struct ifreq *)buffer;
482 struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr;
483 struct dn_dev *dn_db;
484 struct net_device *dev;
485 struct dn_ifaddr *ifa = NULL, **ifap = NULL;
486 int ret = 0;
487
488 if (copy_from_user(ifr, arg, DN_IFREQ_SIZE))
489 return -EFAULT;
490 ifr->ifr_name[IFNAMSIZ-1] = 0;
491
881d966b 492 dev_load(&init_net, ifr->ifr_name);
1da177e4
LT		 493
494 switch(cmd) {
495 case SIOCGIFADDR:
496 break;
497 case SIOCSIFADDR:
498 if (!capable(CAP_NET_ADMIN))
499 return -EACCES;
500 if (sdn->sdn_family != AF_DECnet)
501 return -EINVAL;
502 break;
503 default:
504 return -EINVAL;
505 }
506
507 rtnl_lock();
508
881d966b 509 if ((dev = __dev_get_by_name(&init_net, ifr->ifr_name)) == NULL) {
1da177e4
LT		 510 ret = -ENODEV;
511 goto done;
512 }
513
514 if ((dn_db = dev->dn_ptr) != NULL) {
515 for (ifap = &dn_db->ifa_list; (ifa=*ifap) != NULL; ifap = &ifa->ifa_next)
516 if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0)
517 break;
518 }
519
520 if (ifa == NULL && cmd != SIOCSIFADDR) {
521 ret = -EADDRNOTAVAIL;
522 goto done;
523 }
524
525 switch(cmd) {
526 case SIOCGIFADDR:
c4ea94ab 527 *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local;
1da177e4
LT		 528 goto rarok;
529
530 case SIOCSIFADDR:
531 if (!ifa) {
532 if ((ifa = dn_dev_alloc_ifa()) == NULL) {
533 ret = -ENOBUFS;
534 break;
535 }
536 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
537 } else {
538 if (ifa->ifa_local == dn_saddr2dn(sdn))
539 break;
540 dn_dev_del_ifa(dn_db, ifap, 0);
541 }
542
543 ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn);
544
545 ret = dn_dev_set_ifa(dev, ifa);
546 }
547done:
548 rtnl_unlock();
549
550 return ret;
551rarok:
552 if (copy_to_user(arg, ifr, DN_IFREQ_SIZE))
553 ret = -EFAULT;
554 goto done;
555}
556
557struct net_device *dn_dev_get_default(void)
558{
559 struct net_device *dev;
e5c140a3 560
561 spin_lock(&dndev_lock);
1da177e4
LT		 562 dev = decnet_default_device;
563 if (dev) {
564 if (dev->dn_ptr)
565 dev_hold(dev);
566 else
567 dev = NULL;
568 }
e5c140a3 569 spin_unlock(&dndev_lock);
570
1da177e4
LT		 571 return dev;
572}
573
574int dn_dev_set_default(struct net_device *dev, int force)
575{
576 struct net_device *old = NULL;
577 int rv = -EBUSY;
578 if (!dev->dn_ptr)
579 return -ENODEV;
e5c140a3 580
581 spin_lock(&dndev_lock);
1da177e4
LT		 582 if (force || decnet_default_device == NULL) {
583 old = decnet_default_device;
584 decnet_default_device = dev;
585 rv = 0;
586 }
e5c140a3 587 spin_unlock(&dndev_lock);
588
1da177e4 589 if (old)
6a57b2ee 590 dev_put(old);
1da177e4
LT		 591 return rv;
592}
593
594static void dn_dev_check_default(struct net_device *dev)
595{
e5c140a3 596 spin_lock(&dndev_lock);
1da177e4
LT		 597 if (dev == decnet_default_device) {
598 decnet_default_device = NULL;
599 } else {
600 dev = NULL;
601 }
e5c140a3 602 spin_unlock(&dndev_lock);
603
1da177e4
LT		 604 if (dev)
605 dev_put(dev);
606}
607
b4d745db
ED		 608/*
609 * Called with RTNL
610 */
1da177e4
LT		 611static struct dn_dev *dn_dev_by_index(int ifindex)
612{
613 struct net_device *dev;
614 struct dn_dev *dn_dev = NULL;
b4d745db
ED		 615
616 dev = __dev_get_by_index(&init_net, ifindex);
617 if (dev)
1da177e4 618 dn_dev = dev->dn_ptr;
1da177e4
LT		 619
620 return dn_dev;
621}
622
ef7c79ed 623static const struct nla_policy dn_ifa_policy[IFA_MAX+1] = {
4a89c256
TG		 624 [IFA_ADDRESS] = { .type = NLA_U16 },
625 [IFA_LOCAL] = { .type = NLA_U16 },
626 [IFA_LABEL] = { .type = NLA_STRING,
627 .len = IFNAMSIZ - 1 },
628};
629
630static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1da177e4 631{
3b1e0a65 632 struct net *net = sock_net(skb->sk);
4a89c256 633 struct nlattr *tb[IFA_MAX+1];
1da177e4 634 struct dn_dev *dn_db;
4a89c256 635 struct ifaddrmsg *ifm;
1da177e4 636 struct dn_ifaddr *ifa, **ifap;
b854272b
DL		 637 int err = -EINVAL;
638
09ad9bc7 639 if (!net_eq(net, &init_net))
b854272b 640 goto errout;
4a89c256
TG		 641
642 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
643 if (err < 0)
644 goto errout;
1da177e4 645
3ccd8624 646 err = -ENODEV;
4a89c256 647 ifm = nlmsg_data(nlh);
1da177e4 648 if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL)
4a89c256
TG		 649 goto errout;
650
3ccd8624 651 err = -EADDRNOTAVAIL;
4a89c256
TG		 652 for (ifap = &dn_db->ifa_list; (ifa = *ifap); ifap = &ifa->ifa_next) {
653 if (tb[IFA_LOCAL] &&
654 nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2))
655 continue;
1da177e4 656
4a89c256 657 if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label))
1da177e4
LT		 658 continue;
659
660 dn_dev_del_ifa(dn_db, ifap, 1);
661 return 0;
662 }
663
4a89c256
TG		 664errout:
665 return err;
1da177e4
LT		 666}
667
4a89c256 668static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1da177e4 669{
3b1e0a65 670 struct net *net = sock_net(skb->sk);
4a89c256 671 struct nlattr *tb[IFA_MAX+1];
1da177e4
LT		 672 struct net_device *dev;
673 struct dn_dev *dn_db;
4a89c256 674 struct ifaddrmsg *ifm;
1da177e4 675 struct dn_ifaddr *ifa;
4a89c256
TG		 676 int err;
677
09ad9bc7 678 if (!net_eq(net, &init_net))
b854272b
DL		 679 return -EINVAL;
680
4a89c256
TG		 681 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
682 if (err < 0)
683 return err;
1da177e4 684
4a89c256 685 if (tb[IFA_LOCAL] == NULL)
1da177e4
LT		 686 return -EINVAL;
687
4a89c256 688 ifm = nlmsg_data(nlh);
881d966b 689 if ((dev = __dev_get_by_index(&init_net, ifm->ifa_index)) == NULL)
1da177e4
LT		 690 return -ENODEV;
691
692 if ((dn_db = dev->dn_ptr) == NULL) {
1da177e4
LT		 693 dn_db = dn_dev_create(dev, &err);
694 if (!dn_db)
695 return err;
696 }
429eb0fa 697
1da177e4
LT		 698 if ((ifa = dn_dev_alloc_ifa()) == NULL)
699 return -ENOBUFS;
700
4a89c256
TG		 701 if (tb[IFA_ADDRESS] == NULL)
702 tb[IFA_ADDRESS] = tb[IFA_LOCAL];
703
704 ifa->ifa_local = nla_get_le16(tb[IFA_LOCAL]);
705 ifa->ifa_address = nla_get_le16(tb[IFA_ADDRESS]);
1da177e4
LT		 706 ifa->ifa_flags = ifm->ifa_flags;
707 ifa->ifa_scope = ifm->ifa_scope;
708 ifa->ifa_dev = dn_db;
4a89c256
TG		 709
710 if (tb[IFA_LABEL])
711 nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ);
1da177e4
LT		 712 else
713 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
714
4a89c256
TG		 715 err = dn_dev_insert_ifa(dn_db, ifa);
716 if (err)
1da177e4 717 dn_dev_free_ifa(ifa);
4a89c256
TG		 718
719 return err;
1da177e4
LT		 720}
721
a6f01cac
TG		 722static inline size_t dn_ifaddr_nlmsg_size(void)
723{
724 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
725 + nla_total_size(IFNAMSIZ) /* IFA_LABEL */
726 + nla_total_size(2) /* IFA_ADDRESS */
727 + nla_total_size(2); /* IFA_LOCAL */
728}
729
4a89c256
TG		 730static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa,
731 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4
LT		 732{
733 struct ifaddrmsg *ifm;
734 struct nlmsghdr *nlh;
1da177e4 735
4a89c256
TG		 736 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*ifm), flags);
737 if (nlh == NULL)
26932566 738 return -EMSGSIZE;
1da177e4 739
4a89c256 740 ifm = nlmsg_data(nlh);
1da177e4
LT		 741 ifm->ifa_family = AF_DECnet;
742 ifm->ifa_prefixlen = 16;
743 ifm->ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT;
744 ifm->ifa_scope = ifa->ifa_scope;
745 ifm->ifa_index = ifa->ifa_dev->dev->ifindex;
4a89c256 746
1da177e4 747 if (ifa->ifa_address)
4a89c256 748 NLA_PUT_LE16(skb, IFA_ADDRESS, ifa->ifa_address);
1da177e4 749 if (ifa->ifa_local)
4a89c256 750 NLA_PUT_LE16(skb, IFA_LOCAL, ifa->ifa_local);
1da177e4 751 if (ifa->ifa_label[0])
4a89c256 752 NLA_PUT_STRING(skb, IFA_LABEL, ifa->ifa_label);
1da177e4 753
4a89c256
TG		 754 return nlmsg_end(skb, nlh);
755
756nla_put_failure:
26932566
PM		 757 nlmsg_cancel(skb, nlh);
758 return -EMSGSIZE;
1da177e4
LT		 759}
760
b020b942 761static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa)
1da177e4
LT		 762{
763 struct sk_buff *skb;
dc738dd8 764 int err = -ENOBUFS;
1da177e4 765
a6f01cac 766 skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL);
dc738dd8
TG		 767 if (skb == NULL)
768 goto errout;
769
4a89c256 770 err = dn_nl_fill_ifaddr(skb, ifa, 0, 0, event, 0);
26932566
PM		 771 if (err < 0) {
772 /* -EMSGSIZE implies BUG in dn_ifaddr_nlmsg_size() */
773 WARN_ON(err == -EMSGSIZE);
774 kfree_skb(skb);
775 goto errout;
776 }
1ce85fe4
PNA		 777 rtnl_notify(skb, &init_net, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL);
778 return;
dc738dd8
TG		 779errout:
780 if (err < 0)
97c53cac 781 rtnl_set_sk_err(&init_net, RTNLGRP_DECnet_IFADDR, err);
1da177e4
LT		 782}
783
4a89c256 784static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4 785{
3b1e0a65 786 struct net *net = sock_net(skb->sk);
4a89c256 787 int idx, dn_idx = 0, skip_ndevs, skip_naddr;
1da177e4
LT		 788 struct net_device *dev;
789 struct dn_dev *dn_db;
790 struct dn_ifaddr *ifa;
791
09ad9bc7 792 if (!net_eq(net, &init_net))
b854272b
DL		 793 return 0;
794
4a89c256
TG		 795 skip_ndevs = cb->args[0];
796 skip_naddr = cb->args[1];
797
7562f876 798 idx = 0;
881d966b 799 for_each_netdev(&init_net, dev) {
4a89c256 800 if (idx < skip_ndevs)
7562f876 801 goto cont;
4a89c256
TG		 802 else if (idx > skip_ndevs) {
803 /* Only skip over addresses for first dev dumped
804 * in this iteration (idx == skip_ndevs) */
805 skip_naddr = 0;
806 }
807
1da177e4 808 if ((dn_db = dev->dn_ptr) == NULL)
7562f876 809 goto cont;
1da177e4 810
4a89c256
TG		 811 for (ifa = dn_db->ifa_list, dn_idx = 0; ifa;
812 ifa = ifa->ifa_next, dn_idx++) {
813 if (dn_idx < skip_naddr)
a2221f30 814 continue;
1da177e4 815
4a89c256
TG		 816 if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid,
817 cb->nlh->nlmsg_seq, RTM_NEWADDR,
818 NLM_F_MULTI) < 0)
1da177e4
LT		 819 goto done;
820 }
7562f876
PE		 821cont:
822 idx++;
1da177e4
LT		 823 }
824done:
1da177e4
LT		 825 cb->args[0] = idx;
826 cb->args[1] = dn_idx;
827
828 return skb->len;
829}
830
c4ea94ab 831static int dn_dev_get_first(struct net_device *dev, __le16 *addr)
1da177e4
LT		 832{
833 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
834 struct dn_ifaddr *ifa;
835 int rv = -ENODEV;
41bdecf1 836
1da177e4
LT		 837 if (dn_db == NULL)
838 goto out;
41bdecf1 839
840 rtnl_lock();
1da177e4
LT		 841 ifa = dn_db->ifa_list;
842 if (ifa != NULL) {
843 *addr = ifa->ifa_local;
844 rv = 0;
845 }
41bdecf1 846 rtnl_unlock();
1da177e4
LT		 847out:
848 return rv;
849}
850
429eb0fa 851/*
1da177e4
LT		 852 * Find a default address to bind to.
853 *
854 * This is one of those areas where the initial VMS concepts don't really
855 * map onto the Linux concepts, and since we introduced multiple addresses
856 * per interface we have to cope with slightly odd ways of finding out what
857 * "our address" really is. Mostly it's not a problem; for this we just guess
858 * a sensible default. Eventually the routing code will take care of all the
859 * nasties for us I hope.
860 */
c4ea94ab 861int dn_dev_bind_default(__le16 *addr)
1da177e4
LT		 862{
863 struct net_device *dev;
864 int rv;
865 dev = dn_dev_get_default();
866last_chance:
867 if (dev) {
1da177e4 868 rv = dn_dev_get_first(dev, addr);
1da177e4 869 dev_put(dev);
2774c7ab 870 if (rv == 0 || dev == init_net.loopback_dev)
1da177e4
LT		 871 return rv;
872 }
2774c7ab 873 dev = init_net.loopback_dev;
1da177e4
LT		 874 dev_hold(dev);
875 goto last_chance;
876}
877
878static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa)
879{
429eb0fa
YH		 880 struct endnode_hello_message *msg;
881 struct sk_buff *skb = NULL;
882 __le16 *pktlen;
1da177e4
LT		 883 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
884
429eb0fa 885 if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL)
1da177e4
LT		 886 return;
887
429eb0fa 888 skb->dev = dev;
1da177e4 889
429eb0fa 890 msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg));
1da177e4 891
429eb0fa
YH		 892 msg->msgflg = 0x0D;
893 memcpy(msg->tiver, dn_eco_version, 3);
1da177e4 894 dn_dn2eth(msg->id, ifa->ifa_local);
429eb0fa 895 msg->iinfo = DN_RT_INFO_ENDN;
c4106aa8 896 msg->blksize = cpu_to_le16(mtu2blksize(dev));
429eb0fa
YH		 897 msg->area = 0x00;
898 memset(msg->seed, 0, 8);
899 memcpy(msg->neighbor, dn_hiord, ETH_ALEN);
1da177e4
LT		 900
901 if (dn_db->router) {
902 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
903 dn_dn2eth(msg->neighbor, dn->addr);
904 }
905
c4106aa8 906 msg->timer = cpu_to_le16((unsigned short)dn_db->parms.t3);
429eb0fa
YH		 907 msg->mpd = 0x00;
908 msg->datalen = 0x02;
909 memset(msg->data, 0xAA, 2);
910
911 pktlen = (__le16 *)skb_push(skb,2);
c4106aa8 912 *pktlen = cpu_to_le16(skb->len - 2);
1da177e4 913
c1d2bbe1 914 skb_reset_network_header(skb);
1da177e4
LT		 915
916 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id);
917}
918
919
920#define DRDELAY (5 * HZ)
921
922static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa)
923{
924 /* First check time since device went up */
925 if ((jiffies - dn_db->uptime) < DRDELAY)
926 return 0;
927
928 /* If there is no router, then yes... */
929 if (!dn_db->router)
930 return 1;
931
932 /* otherwise only if we have a higher priority or.. */
933 if (dn->priority < dn_db->parms.priority)
934 return 1;
935
936 /* if we have equal priority and a higher node number */
937 if (dn->priority != dn_db->parms.priority)
938 return 0;
939
c4106aa8 940 if (le16_to_cpu(dn->addr) < le16_to_cpu(ifa->ifa_local))
1da177e4
LT		 941 return 1;
942
943 return 0;
944}
945
946static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa)
947{
948 int n;
949 struct dn_dev *dn_db = dev->dn_ptr;
950 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
951 struct sk_buff *skb;
952 size_t size;
953 unsigned char *ptr;
954 unsigned char *i1, *i2;
c4ea94ab 955 __le16 *pktlen;
1da177e4
LT		 956 char *src;
957
958 if (mtu2blksize(dev) < (26 + 7))
959 return;
960
961 n = mtu2blksize(dev) - 26;
962 n /= 7;
963
964 if (n > 32)
965 n = 32;
966
967 size = 2 + 26 + 7 * n;
968
969 if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL)
970 return;
971
972 skb->dev = dev;
973 ptr = skb_put(skb, size);
974
975 *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH;
976 *ptr++ = 2; /* ECO */
977 *ptr++ = 0;
978 *ptr++ = 0;
979 dn_dn2eth(ptr, ifa->ifa_local);
980 src = ptr;
981 ptr += ETH_ALEN;
429eb0fa 982 *ptr++ = dn_db->parms.forwarding == 1 ?
1da177e4 983 DN_RT_INFO_L1RT : DN_RT_INFO_L2RT;
c4106aa8 984 *((__le16 *)ptr) = cpu_to_le16(mtu2blksize(dev));
1da177e4 985 ptr += 2;
429eb0fa 986 *ptr++ = dn_db->parms.priority; /* Priority */
1da177e4 987 *ptr++ = 0; /* Area: Reserved */
c4106aa8 988 *((__le16 *)ptr) = cpu_to_le16((unsigned short)dn_db->parms.t3);
1da177e4
LT		 989 ptr += 2;
990 *ptr++ = 0; /* MPD: Reserved */
991 i1 = ptr++;
992 memset(ptr, 0, 7); /* Name: Reserved */
993 ptr += 7;
994 i2 = ptr++;
995
996 n = dn_neigh_elist(dev, ptr, n);
997
998 *i2 = 7 * n;
999 *i1 = 8 + *i2;
1000
1001 skb_trim(skb, (27 + *i2));
1002
c4ea94ab 1003 pktlen = (__le16 *)skb_push(skb, 2);
c4106aa8 1004 *pktlen = cpu_to_le16(skb->len - 2);
1da177e4 1005
c1d2bbe1 1006 skb_reset_network_header(skb);
1da177e4
LT		 1007
1008 if (dn_am_i_a_router(dn, dn_db, ifa)) {
1009 struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC);
1010 if (skb2) {
1011 dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src);
1012 }
1013 }
1014
1015 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
1016}
1017
1018static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa)
1019{
1020 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
1021
1022 if (dn_db->parms.forwarding == 0)
1023 dn_send_endnode_hello(dev, ifa);
1024 else
1025 dn_send_router_hello(dev, ifa);
1026}
1027
1028static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa)
1029{
1030 int tdlen = 16;
1031 int size = dev->hard_header_len + 2 + 4 + tdlen;
1032 struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC);
1033 int i;
1034 unsigned char *ptr;
1035 char src[ETH_ALEN];
1036
1037 if (skb == NULL)
1038 return ;
1039
1040 skb->dev = dev;
1041 skb_push(skb, dev->hard_header_len);
1042 ptr = skb_put(skb, 2 + 4 + tdlen);
1043
1044 *ptr++ = DN_RT_PKT_HELO;
c4ea94ab 1045 *((__le16 *)ptr) = ifa->ifa_local;
1da177e4
LT		 1046 ptr += 2;
1047 *ptr++ = tdlen;
1048
1049 for(i = 0; i < tdlen; i++)
1050 *ptr++ = 0252;
1051
1052 dn_dn2eth(src, ifa->ifa_local);
1053 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
1054}
1055
1056static int dn_eth_up(struct net_device *dev)
1057{
1058 struct dn_dev *dn_db = dev->dn_ptr;
1059
1060 if (dn_db->parms.forwarding == 0)
1061 dev_mc_add(dev, dn_rt_all_end_mcast, ETH_ALEN, 0);
1062 else
1063 dev_mc_add(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0);
1064
1da177e4
LT		 1065 dn_db->use_long = 1;
1066
1067 return 0;
1068}
1069
1070static void dn_eth_down(struct net_device *dev)
1071{
1072 struct dn_dev *dn_db = dev->dn_ptr;
1073
1074 if (dn_db->parms.forwarding == 0)
1075 dev_mc_delete(dev, dn_rt_all_end_mcast, ETH_ALEN, 0);
1076 else
1077 dev_mc_delete(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0);
1078}
1079
1080static void dn_dev_set_timer(struct net_device *dev);
1081
1082static void dn_dev_timer_func(unsigned long arg)
1083{
1084 struct net_device *dev = (struct net_device *)arg;
1085 struct dn_dev *dn_db = dev->dn_ptr;
1086 struct dn_ifaddr *ifa;
1087
1088 if (dn_db->t3 <= dn_db->parms.t2) {
1089 if (dn_db->parms.timer3) {
1090 for(ifa = dn_db->ifa_list; ifa; ifa = ifa->ifa_next) {
1091 if (!(ifa->ifa_flags & IFA_F_SECONDARY))
1092 dn_db->parms.timer3(dev, ifa);
1093 }
1094 }
1095 dn_db->t3 = dn_db->parms.t3;
1096 } else {
1097 dn_db->t3 -= dn_db->parms.t2;
1098 }
1099
1100 dn_dev_set_timer(dev);
1101}
1102
1103static void dn_dev_set_timer(struct net_device *dev)
1104{
1105 struct dn_dev *dn_db = dev->dn_ptr;
1106
1107 if (dn_db->parms.t2 > dn_db->parms.t3)
1108 dn_db->parms.t2 = dn_db->parms.t3;
1109
1110 dn_db->timer.data = (unsigned long)dev;
1111 dn_db->timer.function = dn_dev_timer_func;
1112 dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ);
1113
1114 add_timer(&dn_db->timer);
1115}
1116
5eaa65b2 1117static struct dn_dev *dn_dev_create(struct net_device *dev, int *err)
1da177e4
LT		 1118{
1119 int i;
1120 struct dn_dev_parms *p = dn_dev_list;
1121 struct dn_dev *dn_db;
1122
1123 for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) {
1124 if (p->type == dev->type)
1125 break;
1126 }
1127
1128 *err = -ENODEV;
1129 if (i == DN_DEV_LIST_SIZE)
1130 return NULL;
1131
1132 *err = -ENOBUFS;
0da974f4 1133 if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL)
1da177e4
LT		 1134 return NULL;
1135
1da177e4
LT		 1136 memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms));
1137 smp_wmb();
1138 dev->dn_ptr = dn_db;
1139 dn_db->dev = dev;
1140 init_timer(&dn_db->timer);
1141
1142 dn_db->uptime = jiffies;
95743deb
EB		 1143
1144 dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table);
1145 if (!dn_db->neigh_parms) {
1146 dev->dn_ptr = NULL;
1147 kfree(dn_db);
1148 return NULL;
1149 }
1150
1da177e4
LT		 1151 if (dn_db->parms.up) {
1152 if (dn_db->parms.up(dev) < 0) {
95743deb 1153 neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
1da177e4
LT		 1154 dev->dn_ptr = NULL;
1155 kfree(dn_db);
1156 return NULL;
1157 }
1158 }
1159
1da177e4
LT		 1160 dn_dev_sysctl_register(dev, &dn_db->parms);
1161
1162 dn_dev_set_timer(dev);
1163
1164 *err = 0;
1165 return dn_db;
1166}
1167
1168
1169/*
1170 * This processes a device up event. We only start up
1171 * the loopback device & ethernet devices with correct
1172 * MAC addreses automatically. Others must be started
1173 * specifically.
1174 *
1175 * FIXME: How should we configure the loopback address ? If we could dispense
1176 * with using decnet_address here and for autobind, it will be one less thing
1177 * for users to worry about setting up.
1178 */
1179
1180void dn_dev_up(struct net_device *dev)
1181{
1182 struct dn_ifaddr *ifa;
c4ea94ab 1183 __le16 addr = decnet_address;
1da177e4
LT		 1184 int maybe_default = 0;
1185 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
1186
1187 if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK))
1188 return;
1189
1190 /*
1191 * Need to ensure that loopback device has a dn_db attached to it
1192 * to allow creation of neighbours against it, even though it might
1193 * not have a local address of its own. Might as well do the same for
1194 * all autoconfigured interfaces.
1195 */
1196 if (dn_db == NULL) {
1197 int err;
1198 dn_db = dn_dev_create(dev, &err);
1199 if (dn_db == NULL)
1200 return;
1201 }
1202
1203 if (dev->type == ARPHRD_ETHER) {
1204 if (memcmp(dev->dev_addr, dn_hiord, 4) != 0)
1205 return;
c4ea94ab 1206 addr = dn_eth2dn(dev->dev_addr);
1da177e4
LT		 1207 maybe_default = 1;
1208 }
1209
1210 if (addr == 0)
1211 return;
1212
1213 if ((ifa = dn_dev_alloc_ifa()) == NULL)
1214 return;
1215
1216 ifa->ifa_local = ifa->ifa_address = addr;
1217 ifa->ifa_flags = 0;
1218 ifa->ifa_scope = RT_SCOPE_UNIVERSE;
1219 strcpy(ifa->ifa_label, dev->name);
1220
1221 dn_dev_set_ifa(dev, ifa);
1222
1223 /*
1224 * Automagically set the default device to the first automatically
1225 * configured ethernet card in the system.
1226 */
1227 if (maybe_default) {
1228 dev_hold(dev);
1229 if (dn_dev_set_default(dev, 0))
1230 dev_put(dev);
1231 }
1232}
1233
1234static void dn_dev_delete(struct net_device *dev)
1235{
1236 struct dn_dev *dn_db = dev->dn_ptr;
1237
1238 if (dn_db == NULL)
1239 return;
1240
1241 del_timer_sync(&dn_db->timer);
1242 dn_dev_sysctl_unregister(&dn_db->parms);
1243 dn_dev_check_default(dev);
1244 neigh_ifdown(&dn_neigh_table, dev);
1245
1246 if (dn_db->parms.down)
1247 dn_db->parms.down(dev);
1248
1249 dev->dn_ptr = NULL;
1250
1251 neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
1252 neigh_ifdown(&dn_neigh_table, dev);
1253
1254 if (dn_db->router)
1255 neigh_release(dn_db->router);
1256 if (dn_db->peer)
1257 neigh_release(dn_db->peer);
1258
1259 kfree(dn_db);
1260}
1261
1262void dn_dev_down(struct net_device *dev)
1263{
1264 struct dn_dev *dn_db = dev->dn_ptr;
1265 struct dn_ifaddr *ifa;
1266
1267 if (dn_db == NULL)
1268 return;
1269
1270 while((ifa = dn_db->ifa_list) != NULL) {
1271 dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0);
1272 dn_dev_free_ifa(ifa);
1273 }
1274
1275 dn_dev_delete(dev);
1276}
1277
1278void dn_dev_init_pkt(struct sk_buff *skb)
1279{
1280 return;
1281}
1282
1283void dn_dev_veri_pkt(struct sk_buff *skb)
1284{
1285 return;
1286}
1287
1288void dn_dev_hello(struct sk_buff *skb)
1289{
1290 return;
1291}
1292
1293void dn_dev_devices_off(void)
1294{
1295 struct net_device *dev;
1296
1297 rtnl_lock();
881d966b 1298 for_each_netdev(&init_net, dev)
1da177e4
LT		 1299 dn_dev_down(dev);
1300 rtnl_unlock();
1301
1302}
1303
1304void dn_dev_devices_on(void)
1305{
1306 struct net_device *dev;
1307
1308 rtnl_lock();
881d966b 1309 for_each_netdev(&init_net, dev) {
1da177e4
LT		 1310 if (dev->flags & IFF_UP)
1311 dn_dev_up(dev);
1312 }
1313 rtnl_unlock();
1314}
1315
1316int register_dnaddr_notifier(struct notifier_block *nb)
1317{
e041c683 1318 return blocking_notifier_chain_register(&dnaddr_chain, nb);
1da177e4
LT		 1319}
1320
1321int unregister_dnaddr_notifier(struct notifier_block *nb)
1322{
e041c683 1323 return blocking_notifier_chain_unregister(&dnaddr_chain, nb);
1da177e4
LT		 1324}
1325
1326#ifdef CONFIG_PROC_FS
7562f876 1327static inline int is_dn_dev(struct net_device *dev)
1da177e4 1328{
7562f876 1329 return dev->dn_ptr != NULL;
1da177e4
LT		 1330}
1331
7562f876 1332static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos)
fa918602 1333 __acquires(rcu)
1da177e4 1334{
7562f876 1335 int i;
1da177e4
LT		 1336 struct net_device *dev;
1337
fa918602 1338 rcu_read_lock();
1da177e4 1339
7562f876
PE		 1340 if (*pos == 0)
1341 return SEQ_START_TOKEN;
1342
1343 i = 1;
fa918602 1344 for_each_netdev_rcu(&init_net, dev) {
7562f876
PE		 1345 if (!is_dn_dev(dev))
1346 continue;
1347
1348 if (i++ == *pos)
1349 return dev;
1da177e4 1350 }
7562f876
PE		 1351
1352 return NULL;
1da177e4
LT		 1353}
1354
1355static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1356{
7562f876 1357 struct net_device *dev;
1da177e4 1358
1da177e4 1359 ++*pos;
7562f876
PE		 1360
1361 dev = (struct net_device *)v;
1362 if (v == SEQ_START_TOKEN)
881d966b 1363 dev = net_device_entry(&init_net.dev_base_head);
7562f876 1364
fa918602 1365 for_each_netdev_continue_rcu(&init_net, dev) {
7562f876
PE		 1366 if (!is_dn_dev(dev))
1367 continue;
1368
1369 return dev;
1370 }
1371
1372 return NULL;
1da177e4
LT		 1373}
1374
1375static void dn_dev_seq_stop(struct seq_file *seq, void *v)
fa918602 1376 __releases(rcu)
1da177e4 1377{
fa918602 1378 rcu_read_unlock();
1da177e4
LT		 1379}
1380
1381static char *dn_type2asc(char type)
1382{
1383 switch(type) {
1384 case DN_DEV_BCAST:
1385 return "B";
1386 case DN_DEV_UCAST:
1387 return "U";
1388 case DN_DEV_MPOINT:
1389 return "M";
1390 }
1391
1392 return "?";
1393}
1394
1395static int dn_dev_seq_show(struct seq_file *seq, void *v)
1396{
1397 if (v == SEQ_START_TOKEN)
429eb0fa 1398 seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer\n");
1da177e4
LT		 1399 else {
1400 struct net_device *dev = v;
1401 char peer_buf[DN_ASCBUF_LEN];
1402 char router_buf[DN_ASCBUF_LEN];
1403 struct dn_dev *dn_db = dev->dn_ptr;
1404
429eb0fa 1405 seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu"
1da177e4 1406 " %04hu %03d %02x %-10s %-7s %-7s\n",
429eb0fa
YH		 1407 dev->name ? dev->name : "???",
1408 dn_type2asc(dn_db->parms.mode),
1409 0, 0,
1da177e4
LT		 1410 dn_db->t3, dn_db->parms.t3,
1411 mtu2blksize(dev),
1412 dn_db->parms.priority,
1413 dn_db->parms.state, dn_db->parms.name,
c4106aa8
HH		 1414 dn_db->router ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->router->primary_key), router_buf) : "",
1415 dn_db->peer ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->peer->primary_key), peer_buf) : "");
1da177e4
LT		 1416 }
1417 return 0;
1418}
1419
56b3d975 1420static const struct seq_operations dn_dev_seq_ops = {
1da177e4
LT		 1421 .start = dn_dev_seq_start,
1422 .next = dn_dev_seq_next,
1423 .stop = dn_dev_seq_stop,
1424 .show = dn_dev_seq_show,
1425};
1426
1427static int dn_dev_seq_open(struct inode *inode, struct file *file)
1428{
1429 return seq_open(file, &dn_dev_seq_ops);
1430}
1431
9a32144e 1432static const struct file_operations dn_dev_seq_fops = {
1da177e4
LT		 1433 .owner = THIS_MODULE,
1434 .open = dn_dev_seq_open,
1435 .read = seq_read,
1436 .llseek = seq_lseek,
1437 .release = seq_release,
1438};
1439
1440#endif /* CONFIG_PROC_FS */
1441
4e058063 1442static int addr[2];
1da177e4
LT		 1443module_param_array(addr, int, NULL, 0444);
1444MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node");
1445
1446void __init dn_dev_init(void)
1447{
429eb0fa
YH		 1448 if (addr[0] > 63 || addr[0] < 0) {
1449 printk(KERN_ERR "DECnet: Area must be between 0 and 63");
1450 return;
1451 }
1da177e4 1452
429eb0fa
YH		 1453 if (addr[1] > 1023 || addr[1] < 0) {
1454 printk(KERN_ERR "DECnet: Node must be between 0 and 1023");
1455 return;
1456 }
1da177e4 1457
c4106aa8 1458 decnet_address = cpu_to_le16((addr[0] << 10) | addr[1]);
1da177e4
LT		 1459
1460 dn_dev_devices_on();
1461
fa34ddd7
TG		 1462 rtnl_register(PF_DECnet, RTM_NEWADDR, dn_nl_newaddr, NULL);
1463 rtnl_register(PF_DECnet, RTM_DELADDR, dn_nl_deladdr, NULL);
1464 rtnl_register(PF_DECnet, RTM_GETADDR, NULL, dn_nl_dump_ifaddr);
1da177e4 1465
457c4cbc 1466 proc_net_fops_create(&init_net, "decnet_dev", S_IRUGO, &dn_dev_seq_fops);
1da177e4
LT		 1467
1468#ifdef CONFIG_SYSCTL
1469 {
1470 int i;
1471 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1472 dn_dev_sysctl_register(NULL, &dn_dev_list[i]);
1473 }
1474#endif /* CONFIG_SYSCTL */
1475}
1476
1477void __exit dn_dev_cleanup(void)
1478{
1da177e4
LT		 1479#ifdef CONFIG_SYSCTL
1480 {
1481 int i;
1482 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1483 dn_dev_sysctl_unregister(&dn_dev_list[i]);
1484 }
1485#endif /* CONFIG_SYSCTL */
1486
457c4cbc 1487 proc_net_remove(&init_net, "decnet_dev");
1da177e4
LT		 1488
1489 dn_dev_devices_off();
1490}
kernel source for telekom puls (alcatel/mediatek)