blob: 2ab16e12520c525db2a84f0bb80eb4857f55f217 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Randy Dunlap4fc268d2006-01-11 12:17:47 -080027#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#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>
Thomas Graf18237302006-08-04 23:04:54 -070037#include <linux/if_addr.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include <linux/if_arp.h>
39#include <linux/if_ether.h>
40#include <linux/skbuff.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#include <linux/sysctl.h>
42#include <linux/notifier.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090043#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#include <asm/uaccess.h>
45#include <asm/system.h>
Eric W. Biederman457c4cb2007-09-12 12:01:34 +020046#include <net/net_namespace.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070047#include <net/neighbour.h>
48#include <net/dst.h>
49#include <net/flow.h>
Steven Whitehousea8731cb2006-08-09 15:56:46 -070050#include <net/fib_rules.h>
Thomas Grafa6f01ca2006-11-24 17:14:07 -080051#include <net/netlink.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070052#include <net/dn.h>
53#include <net/dn_dev.h>
54#include <net/dn_route.h>
55#include <net/dn_neigh.h>
56#include <net/dn_fib.h>
57
58#define DN_IFREQ_SIZE (sizeof(struct ifreq) - sizeof(struct sockaddr) + sizeof(struct sockaddr_dn))
59
60static char dn_rt_all_end_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x04,0x00,0x00};
61static char dn_rt_all_rt_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x03,0x00,0x00};
62static char dn_hiord[ETH_ALEN] = {0xAA,0x00,0x04,0x00,0x00,0x00};
63static unsigned char dn_eco_version[3] = {0x02,0x00,0x00};
64
65extern struct neigh_table dn_neigh_table;
66
67/*
68 * decnet_address is kept in network order.
69 */
Steven Whitehousec4ea94a2006-03-20 22:42:39 -080070__le16 decnet_address = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070071
stephen hemmingere5c140a2009-11-11 07:40:36 +000072static DEFINE_SPINLOCK(dndev_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -070073static struct net_device *decnet_default_device;
Alan Sterne041c682006-03-27 01:16:30 -080074static BLOCKING_NOTIFIER_HEAD(dnaddr_chain);
Linus Torvalds1da177e2005-04-16 15:20:36 -070075
76static struct dn_dev *dn_dev_create(struct net_device *dev, int *err);
77static void dn_dev_delete(struct net_device *dev);
Thomas Grafb020b942006-11-24 17:14:31 -080078static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa);
Linus Torvalds1da177e2005-04-16 15:20:36 -070079
80static int dn_eth_up(struct net_device *);
81static void dn_eth_down(struct net_device *);
82static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa);
83static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa);
84
85static struct dn_dev_parms dn_dev_list[] = {
86{
87 .type = ARPHRD_ETHER, /* Ethernet */
88 .mode = DN_DEV_BCAST,
89 .state = DN_DEV_S_RU,
90 .t2 = 1,
91 .t3 = 10,
92 .name = "ethernet",
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 .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",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 .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",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114 .timer3 = dn_send_ptp_hello,
115},
116#endif
117#if 0
118{
119 .type = ARPHRD_PPP, /* DECnet over PPP */
120 .mode = DN_DEV_BCAST,
121 .state = DN_DEV_S_RU,
122 .t2 = 1,
123 .t3 = 10,
124 .name = "ppp",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 .timer3 = dn_send_brd_hello,
126},
127#endif
128{
129 .type = ARPHRD_DDCMP, /* DECnet over DDCMP */
130 .mode = DN_DEV_UCAST,
131 .state = DN_DEV_S_DS,
132 .t2 = 1,
133 .t3 = 120,
134 .name = "ddcmp",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135 .timer3 = dn_send_ptp_hello,
136},
137{
138 .type = ARPHRD_LOOPBACK, /* Loopback interface - always last */
139 .mode = DN_DEV_BCAST,
140 .state = DN_DEV_S_RU,
141 .t2 = 1,
142 .t3 = 10,
143 .name = "loopback",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 .timer3 = dn_send_brd_hello,
145}
146};
147
Denis Cheng8b14a532007-09-16 16:41:29 -0700148#define DN_DEV_LIST_SIZE ARRAY_SIZE(dn_dev_list)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149
David S. Miller8fa0b312008-10-15 15:59:50 -0700150#define DN_DEV_PARMS_OFFSET(x) offsetof(struct dn_dev_parms, x)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151
152#ifdef CONFIG_SYSCTL
153
154static int min_t2[] = { 1 };
155static int max_t2[] = { 60 }; /* No max specified, but this seems sensible */
156static int min_t3[] = { 1 };
157static int max_t3[] = { 8191 }; /* Must fit in 16 bits when multiplied by BCT3MULT or T3MULT */
158
159static int min_priority[1];
160static int max_priority[] = { 127 }; /* From DECnet spec */
161
Alexey Dobriyan8d65af72009-09-23 15:57:19 -0700162static int dn_forwarding_proc(ctl_table *, int,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 void __user *, size_t *, loff_t *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164static struct dn_dev_sysctl_table {
165 struct ctl_table_header *sysctl_header;
166 ctl_table dn_dev_vars[5];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167} dn_dev_sysctl = {
168 NULL,
169 {
170 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 .procname = "forwarding",
172 .data = (void *)DN_DEV_PARMS_OFFSET(forwarding),
173 .maxlen = sizeof(int),
174 .mode = 0644,
175 .proc_handler = dn_forwarding_proc,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176 },
177 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 .procname = "priority",
179 .data = (void *)DN_DEV_PARMS_OFFSET(priority),
180 .maxlen = sizeof(int),
181 .mode = 0644,
182 .proc_handler = proc_dointvec_minmax,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 .extra1 = &min_priority,
184 .extra2 = &max_priority
185 },
186 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 .procname = "t2",
188 .data = (void *)DN_DEV_PARMS_OFFSET(t2),
189 .maxlen = sizeof(int),
190 .mode = 0644,
191 .proc_handler = proc_dointvec_minmax,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 .extra1 = &min_t2,
193 .extra2 = &max_t2
194 },
195 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 .procname = "t3",
197 .data = (void *)DN_DEV_PARMS_OFFSET(t3),
198 .maxlen = sizeof(int),
199 .mode = 0644,
200 .proc_handler = proc_dointvec_minmax,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 .extra1 = &min_t3,
202 .extra2 = &max_t3
203 },
204 {0}
205 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206};
207
208static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
209{
210 struct dn_dev_sysctl_table *t;
211 int i;
212
Pavel Emelyanov3151a9a2008-01-09 00:31:49 -0800213#define DN_CTL_PATH_DEV 3
214
215 struct ctl_path dn_ctl_path[] = {
Eric W. Biedermanf8572d82009-11-05 13:32:03 -0800216 { .procname = "net", },
217 { .procname = "decnet", },
218 { .procname = "conf", },
Pavel Emelyanov3151a9a2008-01-09 00:31:49 -0800219 { /* to be set */ },
220 { },
221 };
222
Arnaldo Carvalho de Meloc66b7212006-11-17 12:29:21 -0200223 t = kmemdup(&dn_dev_sysctl, sizeof(*t), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 if (t == NULL)
225 return;
226
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 for(i = 0; i < ARRAY_SIZE(t->dn_dev_vars) - 1; i++) {
228 long offset = (long)t->dn_dev_vars[i].data;
229 t->dn_dev_vars[i].data = ((char *)parms) + offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 }
231
232 if (dev) {
Pavel Emelyanov3151a9a2008-01-09 00:31:49 -0800233 dn_ctl_path[DN_CTL_PATH_DEV].procname = dev->name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 } else {
Pavel Emelyanov3151a9a2008-01-09 00:31:49 -0800235 dn_ctl_path[DN_CTL_PATH_DEV].procname = parms->name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 }
237
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 t->dn_dev_vars[0].extra1 = (void *)dev;
239
Pavel Emelyanov3151a9a2008-01-09 00:31:49 -0800240 t->sysctl_header = register_sysctl_paths(dn_ctl_path, t->dn_dev_vars);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 if (t->sysctl_header == NULL)
242 kfree(t);
243 else
244 parms->sysctl = t;
245}
246
247static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
248{
249 if (parms->sysctl) {
250 struct dn_dev_sysctl_table *t = parms->sysctl;
251 parms->sysctl = NULL;
252 unregister_sysctl_table(t->sysctl_header);
253 kfree(t);
254 }
255}
256
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900257static int dn_forwarding_proc(ctl_table *table, int write,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 void __user *buffer,
259 size_t *lenp, loff_t *ppos)
260{
261#ifdef CONFIG_DECNET_ROUTER
262 struct net_device *dev = table->extra1;
263 struct dn_dev *dn_db;
264 int err;
265 int tmp, old;
266
267 if (table->extra1 == NULL)
268 return -EINVAL;
269
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000270 dn_db = rcu_dereference_raw(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 old = dn_db->parms.forwarding;
272
Alexey Dobriyan8d65af72009-09-23 15:57:19 -0700273 err = proc_dointvec(table, write, buffer, lenp, ppos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274
275 if ((err >= 0) && write) {
276 if (dn_db->parms.forwarding < 0)
277 dn_db->parms.forwarding = 0;
278 if (dn_db->parms.forwarding > 2)
279 dn_db->parms.forwarding = 2;
280 /*
281 * What an ugly hack this is... its works, just. It
282 * would be nice if sysctl/proc were just that little
283 * bit more flexible so I don't have to write a special
284 * routine, or suffer hacks like this - SJW
285 */
286 tmp = dn_db->parms.forwarding;
287 dn_db->parms.forwarding = old;
288 if (dn_db->parms.down)
289 dn_db->parms.down(dev);
290 dn_db->parms.forwarding = tmp;
291 if (dn_db->parms.up)
292 dn_db->parms.up(dev);
293 }
294
295 return err;
296#else
297 return -EINVAL;
298#endif
299}
300
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301#else /* CONFIG_SYSCTL */
302static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
303{
304}
305static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
306{
307}
308
309#endif /* CONFIG_SYSCTL */
310
311static inline __u16 mtu2blksize(struct net_device *dev)
312{
313 u32 blksize = dev->mtu;
314 if (blksize > 0xffff)
315 blksize = 0xffff;
316
317 if (dev->type == ARPHRD_ETHER ||
318 dev->type == ARPHRD_PPP ||
319 dev->type == ARPHRD_IPGRE ||
320 dev->type == ARPHRD_LOOPBACK)
321 blksize -= 2;
322
323 return (__u16)blksize;
324}
325
326static struct dn_ifaddr *dn_dev_alloc_ifa(void)
327{
328 struct dn_ifaddr *ifa;
329
Panagiotis Issaris0da974f2006-07-21 14:51:30 -0700330 ifa = kzalloc(sizeof(*ifa), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331
332 return ifa;
333}
334
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000335static void dn_dev_free_ifa(struct dn_ifaddr *ifa)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336{
Lai Jiangshan1e547752011-03-15 18:10:12 +0800337 kfree_rcu(ifa, rcu);
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000338}
339
340static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr __rcu **ifap, int destroy)
341{
342 struct dn_ifaddr *ifa1 = rtnl_dereference(*ifap);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343 unsigned char mac_addr[6];
344 struct net_device *dev = dn_db->dev;
345
346 ASSERT_RTNL();
347
348 *ifap = ifa1->ifa_next;
349
350 if (dn_db->dev->type == ARPHRD_ETHER) {
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800351 if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 dn_dn2eth(mac_addr, ifa1->ifa_local);
Jiri Pirko22bedad32010-04-01 21:22:57 +0000353 dev_mc_del(dev, mac_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 }
355 }
356
Thomas Grafb020b942006-11-24 17:14:31 -0800357 dn_ifaddr_notify(RTM_DELADDR, ifa1);
Alan Sterne041c682006-03-27 01:16:30 -0800358 blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 if (destroy) {
360 dn_dev_free_ifa(ifa1);
361
362 if (dn_db->ifa_list == NULL)
363 dn_dev_delete(dn_db->dev);
364 }
365}
366
367static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa)
368{
369 struct net_device *dev = dn_db->dev;
370 struct dn_ifaddr *ifa1;
371 unsigned char mac_addr[6];
372
373 ASSERT_RTNL();
374
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900375 /* Check for duplicates */
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000376 for (ifa1 = rtnl_dereference(dn_db->ifa_list);
377 ifa1 != NULL;
378 ifa1 = rtnl_dereference(ifa1->ifa_next)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 if (ifa1->ifa_local == ifa->ifa_local)
380 return -EEXIST;
381 }
382
383 if (dev->type == ARPHRD_ETHER) {
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800384 if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 dn_dn2eth(mac_addr, ifa->ifa_local);
Jiri Pirko22bedad32010-04-01 21:22:57 +0000386 dev_mc_add(dev, mac_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 }
388 }
389
390 ifa->ifa_next = dn_db->ifa_list;
Stephen Hemmingera9b3cd72011-08-01 16:19:00 +0000391 RCU_INIT_POINTER(dn_db->ifa_list, ifa);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392
Thomas Grafb020b942006-11-24 17:14:31 -0800393 dn_ifaddr_notify(RTM_NEWADDR, ifa);
Alan Sterne041c682006-03-27 01:16:30 -0800394 blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395
396 return 0;
397}
398
399static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa)
400{
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000401 struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 int rv;
403
404 if (dn_db == NULL) {
405 int err;
406 dn_db = dn_dev_create(dev, &err);
407 if (dn_db == NULL)
408 return err;
409 }
410
411 ifa->ifa_dev = dn_db;
412
413 if (dev->flags & IFF_LOOPBACK)
414 ifa->ifa_scope = RT_SCOPE_HOST;
415
416 rv = dn_dev_insert_ifa(dn_db, ifa);
417 if (rv)
418 dn_dev_free_ifa(ifa);
419 return rv;
420}
421
422
423int dn_dev_ioctl(unsigned int cmd, void __user *arg)
424{
425 char buffer[DN_IFREQ_SIZE];
426 struct ifreq *ifr = (struct ifreq *)buffer;
427 struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr;
428 struct dn_dev *dn_db;
429 struct net_device *dev;
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000430 struct dn_ifaddr *ifa = NULL;
431 struct dn_ifaddr __rcu **ifap = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 int ret = 0;
433
434 if (copy_from_user(ifr, arg, DN_IFREQ_SIZE))
435 return -EFAULT;
436 ifr->ifr_name[IFNAMSIZ-1] = 0;
437
Eric W. Biederman881d9662007-09-17 11:56:21 -0700438 dev_load(&init_net, ifr->ifr_name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439
Joe Perches06f8fe12011-07-01 09:43:03 +0000440 switch (cmd) {
441 case SIOCGIFADDR:
442 break;
443 case SIOCSIFADDR:
444 if (!capable(CAP_NET_ADMIN))
445 return -EACCES;
446 if (sdn->sdn_family != AF_DECnet)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 return -EINVAL;
Joe Perches06f8fe12011-07-01 09:43:03 +0000448 break;
449 default:
450 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 }
452
453 rtnl_lock();
454
Eric W. Biederman881d9662007-09-17 11:56:21 -0700455 if ((dev = __dev_get_by_name(&init_net, ifr->ifr_name)) == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 ret = -ENODEV;
457 goto done;
458 }
459
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000460 if ((dn_db = rtnl_dereference(dev->dn_ptr)) != NULL) {
461 for (ifap = &dn_db->ifa_list;
462 (ifa = rtnl_dereference(*ifap)) != NULL;
463 ifap = &ifa->ifa_next)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0)
465 break;
466 }
467
468 if (ifa == NULL && cmd != SIOCSIFADDR) {
469 ret = -EADDRNOTAVAIL;
470 goto done;
471 }
472
Joe Perches06f8fe12011-07-01 09:43:03 +0000473 switch (cmd) {
474 case SIOCGIFADDR:
475 *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local;
476 goto rarok;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477
Joe Perches06f8fe12011-07-01 09:43:03 +0000478 case SIOCSIFADDR:
479 if (!ifa) {
480 if ((ifa = dn_dev_alloc_ifa()) == NULL) {
481 ret = -ENOBUFS;
482 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 }
Joe Perches06f8fe12011-07-01 09:43:03 +0000484 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
485 } else {
486 if (ifa->ifa_local == dn_saddr2dn(sdn))
487 break;
488 dn_dev_del_ifa(dn_db, ifap, 0);
489 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490
Joe Perches06f8fe12011-07-01 09:43:03 +0000491 ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492
Joe Perches06f8fe12011-07-01 09:43:03 +0000493 ret = dn_dev_set_ifa(dev, ifa);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 }
495done:
496 rtnl_unlock();
497
498 return ret;
499rarok:
500 if (copy_to_user(arg, ifr, DN_IFREQ_SIZE))
501 ret = -EFAULT;
502 goto done;
503}
504
505struct net_device *dn_dev_get_default(void)
506{
507 struct net_device *dev;
stephen hemmingere5c140a2009-11-11 07:40:36 +0000508
509 spin_lock(&dndev_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 dev = decnet_default_device;
511 if (dev) {
512 if (dev->dn_ptr)
513 dev_hold(dev);
514 else
515 dev = NULL;
516 }
stephen hemmingere5c140a2009-11-11 07:40:36 +0000517 spin_unlock(&dndev_lock);
518
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519 return dev;
520}
521
522int dn_dev_set_default(struct net_device *dev, int force)
523{
524 struct net_device *old = NULL;
525 int rv = -EBUSY;
526 if (!dev->dn_ptr)
527 return -ENODEV;
stephen hemmingere5c140a2009-11-11 07:40:36 +0000528
529 spin_lock(&dndev_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530 if (force || decnet_default_device == NULL) {
531 old = decnet_default_device;
532 decnet_default_device = dev;
533 rv = 0;
534 }
stephen hemmingere5c140a2009-11-11 07:40:36 +0000535 spin_unlock(&dndev_lock);
536
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537 if (old)
Patrick Caulfield6a57b2e2006-03-29 13:57:31 -0800538 dev_put(old);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539 return rv;
540}
541
542static void dn_dev_check_default(struct net_device *dev)
543{
stephen hemmingere5c140a2009-11-11 07:40:36 +0000544 spin_lock(&dndev_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545 if (dev == decnet_default_device) {
546 decnet_default_device = NULL;
547 } else {
548 dev = NULL;
549 }
stephen hemmingere5c140a2009-11-11 07:40:36 +0000550 spin_unlock(&dndev_lock);
551
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 if (dev)
553 dev_put(dev);
554}
555
Eric Dumazetb4d745d2009-11-04 10:59:38 -0800556/*
557 * Called with RTNL
558 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559static struct dn_dev *dn_dev_by_index(int ifindex)
560{
561 struct net_device *dev;
562 struct dn_dev *dn_dev = NULL;
Eric Dumazetb4d745d2009-11-04 10:59:38 -0800563
564 dev = __dev_get_by_index(&init_net, ifindex);
565 if (dev)
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000566 dn_dev = rtnl_dereference(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567
568 return dn_dev;
569}
570
Patrick McHardyef7c79e2007-06-05 12:38:30 -0700571static const struct nla_policy dn_ifa_policy[IFA_MAX+1] = {
Thomas Graf4a89c252006-11-24 17:14:51 -0800572 [IFA_ADDRESS] = { .type = NLA_U16 },
573 [IFA_LOCAL] = { .type = NLA_U16 },
574 [IFA_LABEL] = { .type = NLA_STRING,
575 .len = IFNAMSIZ - 1 },
576};
577
578static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900580 struct net *net = sock_net(skb->sk);
Thomas Graf4a89c252006-11-24 17:14:51 -0800581 struct nlattr *tb[IFA_MAX+1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 struct dn_dev *dn_db;
Thomas Graf4a89c252006-11-24 17:14:51 -0800583 struct ifaddrmsg *ifm;
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000584 struct dn_ifaddr *ifa;
585 struct dn_ifaddr __rcu **ifap;
Denis V. Lunevb8542722007-12-01 00:21:31 +1100586 int err = -EINVAL;
587
Octavian Purdila09ad9bc2009-11-25 15:14:13 -0800588 if (!net_eq(net, &init_net))
Denis V. Lunevb8542722007-12-01 00:21:31 +1100589 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590
Thomas Graf4a89c252006-11-24 17:14:51 -0800591 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
592 if (err < 0)
593 goto errout;
594
Pavel Emelyanov3ccd8622007-11-30 23:43:31 +1100595 err = -ENODEV;
Thomas Graf4a89c252006-11-24 17:14:51 -0800596 ifm = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597 if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL)
Thomas Graf4a89c252006-11-24 17:14:51 -0800598 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599
Pavel Emelyanov3ccd8622007-11-30 23:43:31 +1100600 err = -EADDRNOTAVAIL;
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000601 for (ifap = &dn_db->ifa_list;
602 (ifa = rtnl_dereference(*ifap)) != NULL;
603 ifap = &ifa->ifa_next) {
Thomas Graf4a89c252006-11-24 17:14:51 -0800604 if (tb[IFA_LOCAL] &&
605 nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2))
606 continue;
607
608 if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609 continue;
610
611 dn_dev_del_ifa(dn_db, ifap, 1);
612 return 0;
613 }
614
Thomas Graf4a89c252006-11-24 17:14:51 -0800615errout:
616 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617}
618
Thomas Graf4a89c252006-11-24 17:14:51 -0800619static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900621 struct net *net = sock_net(skb->sk);
Thomas Graf4a89c252006-11-24 17:14:51 -0800622 struct nlattr *tb[IFA_MAX+1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623 struct net_device *dev;
624 struct dn_dev *dn_db;
Thomas Graf4a89c252006-11-24 17:14:51 -0800625 struct ifaddrmsg *ifm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626 struct dn_ifaddr *ifa;
Thomas Graf4a89c252006-11-24 17:14:51 -0800627 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628
Octavian Purdila09ad9bc2009-11-25 15:14:13 -0800629 if (!net_eq(net, &init_net))
Denis V. Lunevb8542722007-12-01 00:21:31 +1100630 return -EINVAL;
631
Thomas Graf4a89c252006-11-24 17:14:51 -0800632 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
633 if (err < 0)
634 return err;
635
636 if (tb[IFA_LOCAL] == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637 return -EINVAL;
638
Thomas Graf4a89c252006-11-24 17:14:51 -0800639 ifm = nlmsg_data(nlh);
Eric W. Biederman881d9662007-09-17 11:56:21 -0700640 if ((dev = __dev_get_by_index(&init_net, ifm->ifa_index)) == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641 return -ENODEV;
642
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000643 if ((dn_db = rtnl_dereference(dev->dn_ptr)) == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644 dn_db = dn_dev_create(dev, &err);
645 if (!dn_db)
646 return err;
647 }
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900648
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649 if ((ifa = dn_dev_alloc_ifa()) == NULL)
650 return -ENOBUFS;
651
Thomas Graf4a89c252006-11-24 17:14:51 -0800652 if (tb[IFA_ADDRESS] == NULL)
653 tb[IFA_ADDRESS] = tb[IFA_LOCAL];
654
655 ifa->ifa_local = nla_get_le16(tb[IFA_LOCAL]);
656 ifa->ifa_address = nla_get_le16(tb[IFA_ADDRESS]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657 ifa->ifa_flags = ifm->ifa_flags;
658 ifa->ifa_scope = ifm->ifa_scope;
659 ifa->ifa_dev = dn_db;
Thomas Graf4a89c252006-11-24 17:14:51 -0800660
661 if (tb[IFA_LABEL])
662 nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 else
664 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
665
Thomas Graf4a89c252006-11-24 17:14:51 -0800666 err = dn_dev_insert_ifa(dn_db, ifa);
667 if (err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 dn_dev_free_ifa(ifa);
Thomas Graf4a89c252006-11-24 17:14:51 -0800669
670 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671}
672
Thomas Grafa6f01ca2006-11-24 17:14:07 -0800673static inline size_t dn_ifaddr_nlmsg_size(void)
674{
675 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
676 + nla_total_size(IFNAMSIZ) /* IFA_LABEL */
677 + nla_total_size(2) /* IFA_ADDRESS */
678 + nla_total_size(2); /* IFA_LOCAL */
679}
680
Thomas Graf4a89c252006-11-24 17:14:51 -0800681static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa,
682 u32 pid, u32 seq, int event, unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683{
684 struct ifaddrmsg *ifm;
685 struct nlmsghdr *nlh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686
Thomas Graf4a89c252006-11-24 17:14:51 -0800687 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*ifm), flags);
688 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -0800689 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690
Thomas Graf4a89c252006-11-24 17:14:51 -0800691 ifm = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692 ifm->ifa_family = AF_DECnet;
693 ifm->ifa_prefixlen = 16;
694 ifm->ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT;
695 ifm->ifa_scope = ifa->ifa_scope;
696 ifm->ifa_index = ifa->ifa_dev->dev->ifindex;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697
Thomas Graf4a89c252006-11-24 17:14:51 -0800698 if (ifa->ifa_address)
699 NLA_PUT_LE16(skb, IFA_ADDRESS, ifa->ifa_address);
700 if (ifa->ifa_local)
701 NLA_PUT_LE16(skb, IFA_LOCAL, ifa->ifa_local);
702 if (ifa->ifa_label[0])
703 NLA_PUT_STRING(skb, IFA_LABEL, ifa->ifa_label);
704
705 return nlmsg_end(skb, nlh);
706
707nla_put_failure:
Patrick McHardy26932562007-01-31 23:16:40 -0800708 nlmsg_cancel(skb, nlh);
709 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710}
711
Thomas Grafb020b942006-11-24 17:14:31 -0800712static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713{
714 struct sk_buff *skb;
Thomas Grafdc738dd2006-08-15 00:33:35 -0700715 int err = -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716
Thomas Grafa6f01ca2006-11-24 17:14:07 -0800717 skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL);
Thomas Grafdc738dd2006-08-15 00:33:35 -0700718 if (skb == NULL)
719 goto errout;
720
Thomas Graf4a89c252006-11-24 17:14:51 -0800721 err = dn_nl_fill_ifaddr(skb, ifa, 0, 0, event, 0);
Patrick McHardy26932562007-01-31 23:16:40 -0800722 if (err < 0) {
723 /* -EMSGSIZE implies BUG in dn_ifaddr_nlmsg_size() */
724 WARN_ON(err == -EMSGSIZE);
725 kfree_skb(skb);
726 goto errout;
727 }
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -0800728 rtnl_notify(skb, &init_net, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL);
729 return;
Thomas Grafdc738dd2006-08-15 00:33:35 -0700730errout:
731 if (err < 0)
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800732 rtnl_set_sk_err(&init_net, RTNLGRP_DECnet_IFADDR, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733}
734
Thomas Graf4a89c252006-11-24 17:14:51 -0800735static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900737 struct net *net = sock_net(skb->sk);
Thomas Graf4a89c252006-11-24 17:14:51 -0800738 int idx, dn_idx = 0, skip_ndevs, skip_naddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739 struct net_device *dev;
740 struct dn_dev *dn_db;
741 struct dn_ifaddr *ifa;
742
Octavian Purdila09ad9bc2009-11-25 15:14:13 -0800743 if (!net_eq(net, &init_net))
Denis V. Lunevb8542722007-12-01 00:21:31 +1100744 return 0;
745
Thomas Graf4a89c252006-11-24 17:14:51 -0800746 skip_ndevs = cb->args[0];
747 skip_naddr = cb->args[1];
748
Pavel Emelianov7562f872007-05-03 15:13:45 -0700749 idx = 0;
Eric Dumazete67f88d2011-04-27 22:56:07 +0000750 rcu_read_lock();
751 for_each_netdev_rcu(&init_net, dev) {
Thomas Graf4a89c252006-11-24 17:14:51 -0800752 if (idx < skip_ndevs)
Pavel Emelianov7562f872007-05-03 15:13:45 -0700753 goto cont;
Thomas Graf4a89c252006-11-24 17:14:51 -0800754 else if (idx > skip_ndevs) {
755 /* Only skip over addresses for first dev dumped
756 * in this iteration (idx == skip_ndevs) */
757 skip_naddr = 0;
758 }
759
Eric Dumazete67f88d2011-04-27 22:56:07 +0000760 if ((dn_db = rcu_dereference(dev->dn_ptr)) == NULL)
Pavel Emelianov7562f872007-05-03 15:13:45 -0700761 goto cont;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762
Eric Dumazete67f88d2011-04-27 22:56:07 +0000763 for (ifa = rcu_dereference(dn_db->ifa_list), dn_idx = 0; ifa;
764 ifa = rcu_dereference(ifa->ifa_next), dn_idx++) {
Thomas Graf4a89c252006-11-24 17:14:51 -0800765 if (dn_idx < skip_naddr)
Patrick McHardya2221f32007-09-11 10:45:15 +0200766 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767
Thomas Graf4a89c252006-11-24 17:14:51 -0800768 if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid,
769 cb->nlh->nlmsg_seq, RTM_NEWADDR,
770 NLM_F_MULTI) < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 goto done;
772 }
Pavel Emelianov7562f872007-05-03 15:13:45 -0700773cont:
774 idx++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775 }
776done:
Eric Dumazete67f88d2011-04-27 22:56:07 +0000777 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778 cb->args[0] = idx;
779 cb->args[1] = dn_idx;
780
781 return skb->len;
782}
783
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800784static int dn_dev_get_first(struct net_device *dev, __le16 *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785{
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000786 struct dn_dev *dn_db;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787 struct dn_ifaddr *ifa;
788 int rv = -ENODEV;
stephen hemminger41bdecf2009-11-11 07:39:27 +0000789
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000790 rcu_read_lock();
791 dn_db = rcu_dereference(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700792 if (dn_db == NULL)
793 goto out;
stephen hemminger41bdecf2009-11-11 07:39:27 +0000794
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000795 ifa = rcu_dereference(dn_db->ifa_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796 if (ifa != NULL) {
797 *addr = ifa->ifa_local;
798 rv = 0;
799 }
800out:
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000801 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 return rv;
803}
804
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900805/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806 * Find a default address to bind to.
807 *
808 * This is one of those areas where the initial VMS concepts don't really
809 * map onto the Linux concepts, and since we introduced multiple addresses
810 * per interface we have to cope with slightly odd ways of finding out what
811 * "our address" really is. Mostly it's not a problem; for this we just guess
812 * a sensible default. Eventually the routing code will take care of all the
813 * nasties for us I hope.
814 */
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800815int dn_dev_bind_default(__le16 *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816{
817 struct net_device *dev;
818 int rv;
819 dev = dn_dev_get_default();
820last_chance:
821 if (dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822 rv = dn_dev_get_first(dev, addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823 dev_put(dev);
Eric W. Biederman2774c7a2007-09-26 22:10:56 -0700824 if (rv == 0 || dev == init_net.loopback_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825 return rv;
826 }
Eric W. Biederman2774c7a2007-09-26 22:10:56 -0700827 dev = init_net.loopback_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828 dev_hold(dev);
829 goto last_chance;
830}
831
832static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa)
833{
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900834 struct endnode_hello_message *msg;
835 struct sk_buff *skb = NULL;
836 __le16 *pktlen;
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000837 struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900839 if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840 return;
841
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900842 skb->dev = dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900844 msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900846 msg->msgflg = 0x0D;
847 memcpy(msg->tiver, dn_eco_version, 3);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848 dn_dn2eth(msg->id, ifa->ifa_local);
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900849 msg->iinfo = DN_RT_INFO_ENDN;
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800850 msg->blksize = cpu_to_le16(mtu2blksize(dev));
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900851 msg->area = 0x00;
852 memset(msg->seed, 0, 8);
853 memcpy(msg->neighbor, dn_hiord, ETH_ALEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854
855 if (dn_db->router) {
856 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
857 dn_dn2eth(msg->neighbor, dn->addr);
858 }
859
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800860 msg->timer = cpu_to_le16((unsigned short)dn_db->parms.t3);
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900861 msg->mpd = 0x00;
862 msg->datalen = 0x02;
863 memset(msg->data, 0xAA, 2);
864
865 pktlen = (__le16 *)skb_push(skb,2);
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800866 *pktlen = cpu_to_le16(skb->len - 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867
Arnaldo Carvalho de Meloc1d2bbe2007-04-10 20:45:18 -0700868 skb_reset_network_header(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869
870 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id);
871}
872
873
874#define DRDELAY (5 * HZ)
875
876static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa)
877{
878 /* First check time since device went up */
879 if ((jiffies - dn_db->uptime) < DRDELAY)
880 return 0;
881
882 /* If there is no router, then yes... */
883 if (!dn_db->router)
884 return 1;
885
886 /* otherwise only if we have a higher priority or.. */
887 if (dn->priority < dn_db->parms.priority)
888 return 1;
889
890 /* if we have equal priority and a higher node number */
891 if (dn->priority != dn_db->parms.priority)
892 return 0;
893
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800894 if (le16_to_cpu(dn->addr) < le16_to_cpu(ifa->ifa_local))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895 return 1;
896
897 return 0;
898}
899
900static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa)
901{
902 int n;
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000903 struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
905 struct sk_buff *skb;
906 size_t size;
907 unsigned char *ptr;
908 unsigned char *i1, *i2;
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800909 __le16 *pktlen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910 char *src;
911
912 if (mtu2blksize(dev) < (26 + 7))
913 return;
914
915 n = mtu2blksize(dev) - 26;
916 n /= 7;
917
918 if (n > 32)
919 n = 32;
920
921 size = 2 + 26 + 7 * n;
922
923 if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL)
924 return;
925
926 skb->dev = dev;
927 ptr = skb_put(skb, size);
928
929 *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH;
930 *ptr++ = 2; /* ECO */
931 *ptr++ = 0;
932 *ptr++ = 0;
933 dn_dn2eth(ptr, ifa->ifa_local);
934 src = ptr;
935 ptr += ETH_ALEN;
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900936 *ptr++ = dn_db->parms.forwarding == 1 ?
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937 DN_RT_INFO_L1RT : DN_RT_INFO_L2RT;
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800938 *((__le16 *)ptr) = cpu_to_le16(mtu2blksize(dev));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939 ptr += 2;
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900940 *ptr++ = dn_db->parms.priority; /* Priority */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941 *ptr++ = 0; /* Area: Reserved */
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800942 *((__le16 *)ptr) = cpu_to_le16((unsigned short)dn_db->parms.t3);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943 ptr += 2;
944 *ptr++ = 0; /* MPD: Reserved */
945 i1 = ptr++;
946 memset(ptr, 0, 7); /* Name: Reserved */
947 ptr += 7;
948 i2 = ptr++;
949
950 n = dn_neigh_elist(dev, ptr, n);
951
952 *i2 = 7 * n;
953 *i1 = 8 + *i2;
954
955 skb_trim(skb, (27 + *i2));
956
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800957 pktlen = (__le16 *)skb_push(skb, 2);
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800958 *pktlen = cpu_to_le16(skb->len - 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959
Arnaldo Carvalho de Meloc1d2bbe2007-04-10 20:45:18 -0700960 skb_reset_network_header(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961
962 if (dn_am_i_a_router(dn, dn_db, ifa)) {
963 struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC);
964 if (skb2) {
965 dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src);
966 }
967 }
968
969 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
970}
971
972static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa)
973{
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000974 struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975
976 if (dn_db->parms.forwarding == 0)
977 dn_send_endnode_hello(dev, ifa);
978 else
979 dn_send_router_hello(dev, ifa);
980}
981
982static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa)
983{
984 int tdlen = 16;
985 int size = dev->hard_header_len + 2 + 4 + tdlen;
986 struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC);
987 int i;
988 unsigned char *ptr;
989 char src[ETH_ALEN];
990
991 if (skb == NULL)
992 return ;
993
994 skb->dev = dev;
995 skb_push(skb, dev->hard_header_len);
996 ptr = skb_put(skb, 2 + 4 + tdlen);
997
998 *ptr++ = DN_RT_PKT_HELO;
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800999 *((__le16 *)ptr) = ifa->ifa_local;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000 ptr += 2;
1001 *ptr++ = tdlen;
1002
1003 for(i = 0; i < tdlen; i++)
1004 *ptr++ = 0252;
1005
1006 dn_dn2eth(src, ifa->ifa_local);
1007 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
1008}
1009
1010static int dn_eth_up(struct net_device *dev)
1011{
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001012 struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013
1014 if (dn_db->parms.forwarding == 0)
Jiri Pirko22bedad32010-04-01 21:22:57 +00001015 dev_mc_add(dev, dn_rt_all_end_mcast);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016 else
Jiri Pirko22bedad32010-04-01 21:22:57 +00001017 dev_mc_add(dev, dn_rt_all_rt_mcast);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001018
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019 dn_db->use_long = 1;
1020
1021 return 0;
1022}
1023
1024static void dn_eth_down(struct net_device *dev)
1025{
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001026 struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027
1028 if (dn_db->parms.forwarding == 0)
Jiri Pirko22bedad32010-04-01 21:22:57 +00001029 dev_mc_del(dev, dn_rt_all_end_mcast);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030 else
Jiri Pirko22bedad32010-04-01 21:22:57 +00001031 dev_mc_del(dev, dn_rt_all_rt_mcast);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032}
1033
1034static void dn_dev_set_timer(struct net_device *dev);
1035
1036static void dn_dev_timer_func(unsigned long arg)
1037{
1038 struct net_device *dev = (struct net_device *)arg;
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001039 struct dn_dev *dn_db;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040 struct dn_ifaddr *ifa;
1041
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001042 rcu_read_lock();
1043 dn_db = rcu_dereference(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001044 if (dn_db->t3 <= dn_db->parms.t2) {
1045 if (dn_db->parms.timer3) {
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001046 for (ifa = rcu_dereference(dn_db->ifa_list);
1047 ifa;
1048 ifa = rcu_dereference(ifa->ifa_next)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049 if (!(ifa->ifa_flags & IFA_F_SECONDARY))
1050 dn_db->parms.timer3(dev, ifa);
1051 }
1052 }
1053 dn_db->t3 = dn_db->parms.t3;
1054 } else {
1055 dn_db->t3 -= dn_db->parms.t2;
1056 }
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001057 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058 dn_dev_set_timer(dev);
1059}
1060
1061static void dn_dev_set_timer(struct net_device *dev)
1062{
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001063 struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064
1065 if (dn_db->parms.t2 > dn_db->parms.t3)
1066 dn_db->parms.t2 = dn_db->parms.t3;
1067
1068 dn_db->timer.data = (unsigned long)dev;
1069 dn_db->timer.function = dn_dev_timer_func;
1070 dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ);
1071
1072 add_timer(&dn_db->timer);
1073}
1074
Roel Kluin5eaa65b2008-12-10 15:18:31 -08001075static struct dn_dev *dn_dev_create(struct net_device *dev, int *err)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076{
1077 int i;
1078 struct dn_dev_parms *p = dn_dev_list;
1079 struct dn_dev *dn_db;
1080
1081 for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) {
1082 if (p->type == dev->type)
1083 break;
1084 }
1085
1086 *err = -ENODEV;
1087 if (i == DN_DEV_LIST_SIZE)
1088 return NULL;
1089
1090 *err = -ENOBUFS;
Panagiotis Issaris0da974f2006-07-21 14:51:30 -07001091 if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001092 return NULL;
1093
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094 memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms));
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001095
Stephen Hemmingera9b3cd72011-08-01 16:19:00 +00001096 RCU_INIT_POINTER(dev->dn_ptr, dn_db);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097 dn_db->dev = dev;
1098 init_timer(&dn_db->timer);
1099
1100 dn_db->uptime = jiffies;
Eric W. Biederman95743de2007-01-25 15:51:51 -08001101
1102 dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table);
1103 if (!dn_db->neigh_parms) {
Stephen Hemmingera9b3cd72011-08-01 16:19:00 +00001104 RCU_INIT_POINTER(dev->dn_ptr, NULL);
Eric W. Biederman95743de2007-01-25 15:51:51 -08001105 kfree(dn_db);
1106 return NULL;
1107 }
1108
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109 if (dn_db->parms.up) {
1110 if (dn_db->parms.up(dev) < 0) {
Eric W. Biederman95743de2007-01-25 15:51:51 -08001111 neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112 dev->dn_ptr = NULL;
1113 kfree(dn_db);
1114 return NULL;
1115 }
1116 }
1117
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118 dn_dev_sysctl_register(dev, &dn_db->parms);
1119
1120 dn_dev_set_timer(dev);
1121
1122 *err = 0;
1123 return dn_db;
1124}
1125
1126
1127/*
1128 * This processes a device up event. We only start up
1129 * the loopback device & ethernet devices with correct
Uwe Kleine-Königb5950762010-11-01 15:38:34 -04001130 * MAC addresses automatically. Others must be started
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131 * specifically.
1132 *
1133 * FIXME: How should we configure the loopback address ? If we could dispense
1134 * with using decnet_address here and for autobind, it will be one less thing
1135 * for users to worry about setting up.
1136 */
1137
1138void dn_dev_up(struct net_device *dev)
1139{
1140 struct dn_ifaddr *ifa;
Steven Whitehousec4ea94a2006-03-20 22:42:39 -08001141 __le16 addr = decnet_address;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142 int maybe_default = 0;
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001143 struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144
1145 if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK))
1146 return;
1147
1148 /*
1149 * Need to ensure that loopback device has a dn_db attached to it
1150 * to allow creation of neighbours against it, even though it might
1151 * not have a local address of its own. Might as well do the same for
1152 * all autoconfigured interfaces.
1153 */
1154 if (dn_db == NULL) {
1155 int err;
1156 dn_db = dn_dev_create(dev, &err);
1157 if (dn_db == NULL)
1158 return;
1159 }
1160
1161 if (dev->type == ARPHRD_ETHER) {
1162 if (memcmp(dev->dev_addr, dn_hiord, 4) != 0)
1163 return;
Steven Whitehousec4ea94a2006-03-20 22:42:39 -08001164 addr = dn_eth2dn(dev->dev_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165 maybe_default = 1;
1166 }
1167
1168 if (addr == 0)
1169 return;
1170
1171 if ((ifa = dn_dev_alloc_ifa()) == NULL)
1172 return;
1173
1174 ifa->ifa_local = ifa->ifa_address = addr;
1175 ifa->ifa_flags = 0;
1176 ifa->ifa_scope = RT_SCOPE_UNIVERSE;
1177 strcpy(ifa->ifa_label, dev->name);
1178
1179 dn_dev_set_ifa(dev, ifa);
1180
1181 /*
1182 * Automagically set the default device to the first automatically
1183 * configured ethernet card in the system.
1184 */
1185 if (maybe_default) {
1186 dev_hold(dev);
1187 if (dn_dev_set_default(dev, 0))
1188 dev_put(dev);
1189 }
1190}
1191
1192static void dn_dev_delete(struct net_device *dev)
1193{
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001194 struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001195
1196 if (dn_db == NULL)
1197 return;
1198
1199 del_timer_sync(&dn_db->timer);
1200 dn_dev_sysctl_unregister(&dn_db->parms);
1201 dn_dev_check_default(dev);
1202 neigh_ifdown(&dn_neigh_table, dev);
1203
1204 if (dn_db->parms.down)
1205 dn_db->parms.down(dev);
1206
1207 dev->dn_ptr = NULL;
1208
1209 neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
1210 neigh_ifdown(&dn_neigh_table, dev);
1211
1212 if (dn_db->router)
1213 neigh_release(dn_db->router);
1214 if (dn_db->peer)
1215 neigh_release(dn_db->peer);
1216
1217 kfree(dn_db);
1218}
1219
1220void dn_dev_down(struct net_device *dev)
1221{
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001222 struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223 struct dn_ifaddr *ifa;
1224
1225 if (dn_db == NULL)
1226 return;
1227
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001228 while ((ifa = rtnl_dereference(dn_db->ifa_list)) != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229 dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0);
1230 dn_dev_free_ifa(ifa);
1231 }
1232
1233 dn_dev_delete(dev);
1234}
1235
1236void dn_dev_init_pkt(struct sk_buff *skb)
1237{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001238}
1239
1240void dn_dev_veri_pkt(struct sk_buff *skb)
1241{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242}
1243
1244void dn_dev_hello(struct sk_buff *skb)
1245{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001246}
1247
1248void dn_dev_devices_off(void)
1249{
1250 struct net_device *dev;
1251
1252 rtnl_lock();
Eric W. Biederman881d9662007-09-17 11:56:21 -07001253 for_each_netdev(&init_net, dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254 dn_dev_down(dev);
1255 rtnl_unlock();
1256
1257}
1258
1259void dn_dev_devices_on(void)
1260{
1261 struct net_device *dev;
1262
1263 rtnl_lock();
Eric W. Biederman881d9662007-09-17 11:56:21 -07001264 for_each_netdev(&init_net, dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001265 if (dev->flags & IFF_UP)
1266 dn_dev_up(dev);
1267 }
1268 rtnl_unlock();
1269}
1270
1271int register_dnaddr_notifier(struct notifier_block *nb)
1272{
Alan Sterne041c682006-03-27 01:16:30 -08001273 return blocking_notifier_chain_register(&dnaddr_chain, nb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274}
1275
1276int unregister_dnaddr_notifier(struct notifier_block *nb)
1277{
Alan Sterne041c682006-03-27 01:16:30 -08001278 return blocking_notifier_chain_unregister(&dnaddr_chain, nb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001279}
1280
1281#ifdef CONFIG_PROC_FS
Pavel Emelianov7562f872007-05-03 15:13:45 -07001282static inline int is_dn_dev(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001283{
Pavel Emelianov7562f872007-05-03 15:13:45 -07001284 return dev->dn_ptr != NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001285}
1286
1287static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos)
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001288 __acquires(RCU)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001289{
Pavel Emelianov7562f872007-05-03 15:13:45 -07001290 int i;
1291 struct net_device *dev;
1292
stephen hemmingerfa918602009-11-10 07:54:53 +00001293 rcu_read_lock();
Pavel Emelianov7562f872007-05-03 15:13:45 -07001294
1295 if (*pos == 0)
1296 return SEQ_START_TOKEN;
1297
1298 i = 1;
stephen hemmingerfa918602009-11-10 07:54:53 +00001299 for_each_netdev_rcu(&init_net, dev) {
Pavel Emelianov7562f872007-05-03 15:13:45 -07001300 if (!is_dn_dev(dev))
1301 continue;
1302
1303 if (i++ == *pos)
1304 return dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305 }
Pavel Emelianov7562f872007-05-03 15:13:45 -07001306
1307 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001308}
1309
1310static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1311{
Pavel Emelianov7562f872007-05-03 15:13:45 -07001312 struct net_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313
Linus Torvalds1da177e2005-04-16 15:20:36 -07001314 ++*pos;
Pavel Emelianov7562f872007-05-03 15:13:45 -07001315
Joe Perchesea110732011-06-13 16:21:26 +00001316 dev = v;
Pavel Emelianov7562f872007-05-03 15:13:45 -07001317 if (v == SEQ_START_TOKEN)
Eric W. Biederman881d9662007-09-17 11:56:21 -07001318 dev = net_device_entry(&init_net.dev_base_head);
Pavel Emelianov7562f872007-05-03 15:13:45 -07001319
stephen hemmingerfa918602009-11-10 07:54:53 +00001320 for_each_netdev_continue_rcu(&init_net, dev) {
Pavel Emelianov7562f872007-05-03 15:13:45 -07001321 if (!is_dn_dev(dev))
1322 continue;
1323
1324 return dev;
1325 }
1326
1327 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001328}
1329
1330static void dn_dev_seq_stop(struct seq_file *seq, void *v)
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001331 __releases(RCU)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332{
stephen hemmingerfa918602009-11-10 07:54:53 +00001333 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001334}
1335
1336static char *dn_type2asc(char type)
1337{
Joe Perches06f8fe12011-07-01 09:43:03 +00001338 switch (type) {
1339 case DN_DEV_BCAST:
1340 return "B";
1341 case DN_DEV_UCAST:
1342 return "U";
1343 case DN_DEV_MPOINT:
1344 return "M";
Linus Torvalds1da177e2005-04-16 15:20:36 -07001345 }
1346
1347 return "?";
1348}
1349
1350static int dn_dev_seq_show(struct seq_file *seq, void *v)
1351{
1352 if (v == SEQ_START_TOKEN)
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +09001353 seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001354 else {
1355 struct net_device *dev = v;
1356 char peer_buf[DN_ASCBUF_LEN];
1357 char router_buf[DN_ASCBUF_LEN];
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001358 struct dn_dev *dn_db = rcu_dereference(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001359
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +09001360 seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu"
Linus Torvalds1da177e2005-04-16 15:20:36 -07001361 " %04hu %03d %02x %-10s %-7s %-7s\n",
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +09001362 dev->name ? dev->name : "???",
1363 dn_type2asc(dn_db->parms.mode),
1364 0, 0,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001365 dn_db->t3, dn_db->parms.t3,
1366 mtu2blksize(dev),
1367 dn_db->parms.priority,
1368 dn_db->parms.state, dn_db->parms.name,
Harvey Harrisonc4106aa2008-11-27 00:12:47 -08001369 dn_db->router ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->router->primary_key), router_buf) : "",
1370 dn_db->peer ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->peer->primary_key), peer_buf) : "");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001371 }
1372 return 0;
1373}
1374
Philippe De Muyter56b3d972007-07-10 23:07:31 -07001375static const struct seq_operations dn_dev_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001376 .start = dn_dev_seq_start,
1377 .next = dn_dev_seq_next,
1378 .stop = dn_dev_seq_stop,
1379 .show = dn_dev_seq_show,
1380};
1381
1382static int dn_dev_seq_open(struct inode *inode, struct file *file)
1383{
1384 return seq_open(file, &dn_dev_seq_ops);
1385}
1386
Arjan van de Ven9a321442007-02-12 00:55:35 -08001387static const struct file_operations dn_dev_seq_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001388 .owner = THIS_MODULE,
1389 .open = dn_dev_seq_open,
1390 .read = seq_read,
1391 .llseek = seq_lseek,
1392 .release = seq_release,
1393};
1394
1395#endif /* CONFIG_PROC_FS */
1396
Alexey Dobriyan4e058062007-11-05 21:30:11 -08001397static int addr[2];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001398module_param_array(addr, int, NULL, 0444);
1399MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node");
1400
1401void __init dn_dev_init(void)
1402{
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +09001403 if (addr[0] > 63 || addr[0] < 0) {
1404 printk(KERN_ERR "DECnet: Area must be between 0 and 63");
1405 return;
1406 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +09001408 if (addr[1] > 1023 || addr[1] < 0) {
1409 printk(KERN_ERR "DECnet: Node must be between 0 and 1023");
1410 return;
1411 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412
Harvey Harrisonc4106aa2008-11-27 00:12:47 -08001413 decnet_address = cpu_to_le16((addr[0] << 10) | addr[1]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001414
1415 dn_dev_devices_on();
1416
Greg Rosec7ac8672011-06-10 01:27:09 +00001417 rtnl_register(PF_DECnet, RTM_NEWADDR, dn_nl_newaddr, NULL, NULL);
1418 rtnl_register(PF_DECnet, RTM_DELADDR, dn_nl_deladdr, NULL, NULL);
1419 rtnl_register(PF_DECnet, RTM_GETADDR, NULL, dn_nl_dump_ifaddr, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420
Eric W. Biederman457c4cb2007-09-12 12:01:34 +02001421 proc_net_fops_create(&init_net, "decnet_dev", S_IRUGO, &dn_dev_seq_fops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001422
1423#ifdef CONFIG_SYSCTL
1424 {
1425 int i;
1426 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1427 dn_dev_sysctl_register(NULL, &dn_dev_list[i]);
1428 }
1429#endif /* CONFIG_SYSCTL */
1430}
1431
1432void __exit dn_dev_cleanup(void)
1433{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001434#ifdef CONFIG_SYSCTL
1435 {
1436 int i;
1437 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1438 dn_dev_sysctl_unregister(&dn_dev_list[i]);
1439 }
1440#endif /* CONFIG_SYSCTL */
1441
Eric W. Biederman457c4cb2007-09-12 12:01:34 +02001442 proc_net_remove(&init_net, "decnet_dev");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001443
1444 dn_dev_devices_off();
1445}