blob: b2c26b081134a0c5b3697bfbad0148a029a5b95e [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>
Himangi Saraogib5c5c362014-08-20 23:13:07 +053044#include <linux/jiffies.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#include <asm/uaccess.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
Joe Perchesfe2c6332013-06-11 23:04:25 -0700162static int dn_forwarding_proc(struct 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;
Joe Perchesfe2c6332013-06-11 23:04:25 -0700166 struct 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
Eric W. Biederman9bdcc882012-04-19 13:40:37 +0000213 char path[sizeof("net/decnet/conf/") + IFNAMSIZ];
Pavel Emelyanov3151a9a2008-01-09 00:31:49 -0800214
Arnaldo Carvalho de Meloc66b7212006-11-17 12:29:21 -0200215 t = kmemdup(&dn_dev_sysctl, sizeof(*t), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 if (t == NULL)
217 return;
218
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 for(i = 0; i < ARRAY_SIZE(t->dn_dev_vars) - 1; i++) {
220 long offset = (long)t->dn_dev_vars[i].data;
221 t->dn_dev_vars[i].data = ((char *)parms) + offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 }
223
Eric W. Biederman9bdcc882012-04-19 13:40:37 +0000224 snprintf(path, sizeof(path), "net/decnet/conf/%s",
225 dev? dev->name : parms->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 t->dn_dev_vars[0].extra1 = (void *)dev;
228
Eric W. Biederman9bdcc882012-04-19 13:40:37 +0000229 t->sysctl_header = register_net_sysctl(&init_net, path, t->dn_dev_vars);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 if (t->sysctl_header == NULL)
231 kfree(t);
232 else
233 parms->sysctl = t;
234}
235
236static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
237{
238 if (parms->sysctl) {
239 struct dn_dev_sysctl_table *t = parms->sysctl;
240 parms->sysctl = NULL;
Eric W. Biederman5dd3df12012-04-19 13:24:33 +0000241 unregister_net_sysctl_table(t->sysctl_header);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 kfree(t);
243 }
244}
245
Joe Perchesfe2c6332013-06-11 23:04:25 -0700246static int dn_forwarding_proc(struct ctl_table *table, int write,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 void __user *buffer,
248 size_t *lenp, loff_t *ppos)
249{
250#ifdef CONFIG_DECNET_ROUTER
251 struct net_device *dev = table->extra1;
252 struct dn_dev *dn_db;
253 int err;
254 int tmp, old;
255
256 if (table->extra1 == NULL)
257 return -EINVAL;
258
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000259 dn_db = rcu_dereference_raw(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 old = dn_db->parms.forwarding;
261
Alexey Dobriyan8d65af72009-09-23 15:57:19 -0700262 err = proc_dointvec(table, write, buffer, lenp, ppos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263
264 if ((err >= 0) && write) {
265 if (dn_db->parms.forwarding < 0)
266 dn_db->parms.forwarding = 0;
267 if (dn_db->parms.forwarding > 2)
268 dn_db->parms.forwarding = 2;
269 /*
270 * What an ugly hack this is... its works, just. It
271 * would be nice if sysctl/proc were just that little
272 * bit more flexible so I don't have to write a special
273 * routine, or suffer hacks like this - SJW
274 */
275 tmp = dn_db->parms.forwarding;
276 dn_db->parms.forwarding = old;
277 if (dn_db->parms.down)
278 dn_db->parms.down(dev);
279 dn_db->parms.forwarding = tmp;
280 if (dn_db->parms.up)
281 dn_db->parms.up(dev);
282 }
283
284 return err;
285#else
286 return -EINVAL;
287#endif
288}
289
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290#else /* CONFIG_SYSCTL */
291static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
292{
293}
294static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
295{
296}
297
298#endif /* CONFIG_SYSCTL */
299
300static inline __u16 mtu2blksize(struct net_device *dev)
301{
302 u32 blksize = dev->mtu;
303 if (blksize > 0xffff)
304 blksize = 0xffff;
305
306 if (dev->type == ARPHRD_ETHER ||
307 dev->type == ARPHRD_PPP ||
308 dev->type == ARPHRD_IPGRE ||
309 dev->type == ARPHRD_LOOPBACK)
310 blksize -= 2;
311
312 return (__u16)blksize;
313}
314
315static struct dn_ifaddr *dn_dev_alloc_ifa(void)
316{
317 struct dn_ifaddr *ifa;
318
Panagiotis Issaris0da974f2006-07-21 14:51:30 -0700319 ifa = kzalloc(sizeof(*ifa), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320
321 return ifa;
322}
323
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000324static void dn_dev_free_ifa(struct dn_ifaddr *ifa)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325{
Lai Jiangshan1e547752011-03-15 18:10:12 +0800326 kfree_rcu(ifa, rcu);
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000327}
328
329static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr __rcu **ifap, int destroy)
330{
331 struct dn_ifaddr *ifa1 = rtnl_dereference(*ifap);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 unsigned char mac_addr[6];
333 struct net_device *dev = dn_db->dev;
334
335 ASSERT_RTNL();
336
337 *ifap = ifa1->ifa_next;
338
339 if (dn_db->dev->type == ARPHRD_ETHER) {
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800340 if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 dn_dn2eth(mac_addr, ifa1->ifa_local);
Jiri Pirko22bedad32010-04-01 21:22:57 +0000342 dev_mc_del(dev, mac_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343 }
344 }
345
Thomas Grafb020b942006-11-24 17:14:31 -0800346 dn_ifaddr_notify(RTM_DELADDR, ifa1);
Alan Sterne041c682006-03-27 01:16:30 -0800347 blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 if (destroy) {
349 dn_dev_free_ifa(ifa1);
350
351 if (dn_db->ifa_list == NULL)
352 dn_dev_delete(dn_db->dev);
353 }
354}
355
356static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa)
357{
358 struct net_device *dev = dn_db->dev;
359 struct dn_ifaddr *ifa1;
360 unsigned char mac_addr[6];
361
362 ASSERT_RTNL();
363
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900364 /* Check for duplicates */
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000365 for (ifa1 = rtnl_dereference(dn_db->ifa_list);
366 ifa1 != NULL;
367 ifa1 = rtnl_dereference(ifa1->ifa_next)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 if (ifa1->ifa_local == ifa->ifa_local)
369 return -EEXIST;
370 }
371
372 if (dev->type == ARPHRD_ETHER) {
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800373 if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 dn_dn2eth(mac_addr, ifa->ifa_local);
Jiri Pirko22bedad32010-04-01 21:22:57 +0000375 dev_mc_add(dev, mac_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 }
377 }
378
379 ifa->ifa_next = dn_db->ifa_list;
Eric Dumazetcf778b02012-01-12 04:41:32 +0000380 rcu_assign_pointer(dn_db->ifa_list, ifa);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381
Thomas Grafb020b942006-11-24 17:14:31 -0800382 dn_ifaddr_notify(RTM_NEWADDR, ifa);
Alan Sterne041c682006-03-27 01:16:30 -0800383 blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384
385 return 0;
386}
387
388static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa)
389{
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000390 struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391 int rv;
392
393 if (dn_db == NULL) {
394 int err;
395 dn_db = dn_dev_create(dev, &err);
396 if (dn_db == NULL)
397 return err;
398 }
399
400 ifa->ifa_dev = dn_db;
401
402 if (dev->flags & IFF_LOOPBACK)
403 ifa->ifa_scope = RT_SCOPE_HOST;
404
405 rv = dn_dev_insert_ifa(dn_db, ifa);
406 if (rv)
407 dn_dev_free_ifa(ifa);
408 return rv;
409}
410
411
412int dn_dev_ioctl(unsigned int cmd, void __user *arg)
413{
414 char buffer[DN_IFREQ_SIZE];
415 struct ifreq *ifr = (struct ifreq *)buffer;
416 struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr;
417 struct dn_dev *dn_db;
418 struct net_device *dev;
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000419 struct dn_ifaddr *ifa = NULL;
420 struct dn_ifaddr __rcu **ifap = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 int ret = 0;
422
423 if (copy_from_user(ifr, arg, DN_IFREQ_SIZE))
424 return -EFAULT;
425 ifr->ifr_name[IFNAMSIZ-1] = 0;
426
Eric W. Biederman881d9662007-09-17 11:56:21 -0700427 dev_load(&init_net, ifr->ifr_name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428
Joe Perches06f8fe12011-07-01 09:43:03 +0000429 switch (cmd) {
430 case SIOCGIFADDR:
431 break;
432 case SIOCSIFADDR:
433 if (!capable(CAP_NET_ADMIN))
434 return -EACCES;
435 if (sdn->sdn_family != AF_DECnet)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 return -EINVAL;
Joe Perches06f8fe12011-07-01 09:43:03 +0000437 break;
438 default:
439 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 }
441
442 rtnl_lock();
443
Eric W. Biederman881d9662007-09-17 11:56:21 -0700444 if ((dev = __dev_get_by_name(&init_net, ifr->ifr_name)) == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 ret = -ENODEV;
446 goto done;
447 }
448
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000449 if ((dn_db = rtnl_dereference(dev->dn_ptr)) != NULL) {
450 for (ifap = &dn_db->ifa_list;
451 (ifa = rtnl_dereference(*ifap)) != NULL;
452 ifap = &ifa->ifa_next)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0)
454 break;
455 }
456
457 if (ifa == NULL && cmd != SIOCSIFADDR) {
458 ret = -EADDRNOTAVAIL;
459 goto done;
460 }
461
Joe Perches06f8fe12011-07-01 09:43:03 +0000462 switch (cmd) {
463 case SIOCGIFADDR:
464 *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local;
465 goto rarok;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466
Joe Perches06f8fe12011-07-01 09:43:03 +0000467 case SIOCSIFADDR:
468 if (!ifa) {
469 if ((ifa = dn_dev_alloc_ifa()) == NULL) {
470 ret = -ENOBUFS;
471 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 }
Joe Perches06f8fe12011-07-01 09:43:03 +0000473 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
474 } else {
475 if (ifa->ifa_local == dn_saddr2dn(sdn))
476 break;
477 dn_dev_del_ifa(dn_db, ifap, 0);
478 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479
Joe Perches06f8fe12011-07-01 09:43:03 +0000480 ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481
Joe Perches06f8fe12011-07-01 09:43:03 +0000482 ret = dn_dev_set_ifa(dev, ifa);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 }
484done:
485 rtnl_unlock();
486
487 return ret;
488rarok:
489 if (copy_to_user(arg, ifr, DN_IFREQ_SIZE))
490 ret = -EFAULT;
491 goto done;
492}
493
494struct net_device *dn_dev_get_default(void)
495{
496 struct net_device *dev;
stephen hemmingere5c140a2009-11-11 07:40:36 +0000497
498 spin_lock(&dndev_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 dev = decnet_default_device;
500 if (dev) {
501 if (dev->dn_ptr)
502 dev_hold(dev);
503 else
504 dev = NULL;
505 }
stephen hemmingere5c140a2009-11-11 07:40:36 +0000506 spin_unlock(&dndev_lock);
507
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508 return dev;
509}
510
511int dn_dev_set_default(struct net_device *dev, int force)
512{
513 struct net_device *old = NULL;
514 int rv = -EBUSY;
515 if (!dev->dn_ptr)
516 return -ENODEV;
stephen hemmingere5c140a2009-11-11 07:40:36 +0000517
518 spin_lock(&dndev_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519 if (force || decnet_default_device == NULL) {
520 old = decnet_default_device;
521 decnet_default_device = dev;
522 rv = 0;
523 }
stephen hemmingere5c140a2009-11-11 07:40:36 +0000524 spin_unlock(&dndev_lock);
525
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 if (old)
Patrick Caulfield6a57b2e2006-03-29 13:57:31 -0800527 dev_put(old);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528 return rv;
529}
530
531static void dn_dev_check_default(struct net_device *dev)
532{
stephen hemmingere5c140a2009-11-11 07:40:36 +0000533 spin_lock(&dndev_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534 if (dev == decnet_default_device) {
535 decnet_default_device = NULL;
536 } else {
537 dev = NULL;
538 }
stephen hemmingere5c140a2009-11-11 07:40:36 +0000539 spin_unlock(&dndev_lock);
540
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541 if (dev)
542 dev_put(dev);
543}
544
Eric Dumazetb4d745d2009-11-04 10:59:38 -0800545/*
546 * Called with RTNL
547 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548static struct dn_dev *dn_dev_by_index(int ifindex)
549{
550 struct net_device *dev;
551 struct dn_dev *dn_dev = NULL;
Eric Dumazetb4d745d2009-11-04 10:59:38 -0800552
553 dev = __dev_get_by_index(&init_net, ifindex);
554 if (dev)
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000555 dn_dev = rtnl_dereference(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556
557 return dn_dev;
558}
559
Patrick McHardyef7c79e2007-06-05 12:38:30 -0700560static const struct nla_policy dn_ifa_policy[IFA_MAX+1] = {
Thomas Graf4a89c252006-11-24 17:14:51 -0800561 [IFA_ADDRESS] = { .type = NLA_U16 },
562 [IFA_LOCAL] = { .type = NLA_U16 },
563 [IFA_LABEL] = { .type = NLA_STRING,
564 .len = IFNAMSIZ - 1 },
Jiri Pirko9a32b862013-12-08 12:16:09 +0100565 [IFA_FLAGS] = { .type = NLA_U32 },
Thomas Graf4a89c252006-11-24 17:14:51 -0800566};
567
Thomas Graf661d2962013-03-21 07:45:29 +0000568static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900570 struct net *net = sock_net(skb->sk);
Thomas Graf4a89c252006-11-24 17:14:51 -0800571 struct nlattr *tb[IFA_MAX+1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 struct dn_dev *dn_db;
Thomas Graf4a89c252006-11-24 17:14:51 -0800573 struct ifaddrmsg *ifm;
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000574 struct dn_ifaddr *ifa;
575 struct dn_ifaddr __rcu **ifap;
Denis V. Lunevb8542722007-12-01 00:21:31 +1100576 int err = -EINVAL;
577
Eric W. Biederman90f62cf2014-04-23 14:29:27 -0700578 if (!netlink_capable(skb, CAP_NET_ADMIN))
Eric W. Biedermandfc47ef2012-11-16 03:03:00 +0000579 return -EPERM;
580
Octavian Purdila09ad9bc2009-11-25 15:14:13 -0800581 if (!net_eq(net, &init_net))
Denis V. Lunevb8542722007-12-01 00:21:31 +1100582 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583
Thomas Graf4a89c252006-11-24 17:14:51 -0800584 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
585 if (err < 0)
586 goto errout;
587
Pavel Emelyanov3ccd8622007-11-30 23:43:31 +1100588 err = -ENODEV;
Thomas Graf4a89c252006-11-24 17:14:51 -0800589 ifm = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590 if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL)
Thomas Graf4a89c252006-11-24 17:14:51 -0800591 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592
Pavel Emelyanov3ccd8622007-11-30 23:43:31 +1100593 err = -EADDRNOTAVAIL;
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000594 for (ifap = &dn_db->ifa_list;
595 (ifa = rtnl_dereference(*ifap)) != NULL;
596 ifap = &ifa->ifa_next) {
Thomas Graf4a89c252006-11-24 17:14:51 -0800597 if (tb[IFA_LOCAL] &&
598 nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2))
599 continue;
600
601 if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602 continue;
603
604 dn_dev_del_ifa(dn_db, ifap, 1);
605 return 0;
606 }
607
Thomas Graf4a89c252006-11-24 17:14:51 -0800608errout:
609 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610}
611
Thomas Graf661d2962013-03-21 07:45:29 +0000612static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900614 struct net *net = sock_net(skb->sk);
Thomas Graf4a89c252006-11-24 17:14:51 -0800615 struct nlattr *tb[IFA_MAX+1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616 struct net_device *dev;
617 struct dn_dev *dn_db;
Thomas Graf4a89c252006-11-24 17:14:51 -0800618 struct ifaddrmsg *ifm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619 struct dn_ifaddr *ifa;
Thomas Graf4a89c252006-11-24 17:14:51 -0800620 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621
Eric W. Biederman90f62cf2014-04-23 14:29:27 -0700622 if (!netlink_capable(skb, CAP_NET_ADMIN))
Eric W. Biedermandfc47ef2012-11-16 03:03:00 +0000623 return -EPERM;
624
Octavian Purdila09ad9bc2009-11-25 15:14:13 -0800625 if (!net_eq(net, &init_net))
Denis V. Lunevb8542722007-12-01 00:21:31 +1100626 return -EINVAL;
627
Thomas Graf4a89c252006-11-24 17:14:51 -0800628 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
629 if (err < 0)
630 return err;
631
632 if (tb[IFA_LOCAL] == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 return -EINVAL;
634
Thomas Graf4a89c252006-11-24 17:14:51 -0800635 ifm = nlmsg_data(nlh);
Eric W. Biederman881d9662007-09-17 11:56:21 -0700636 if ((dev = __dev_get_by_index(&init_net, ifm->ifa_index)) == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637 return -ENODEV;
638
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000639 if ((dn_db = rtnl_dereference(dev->dn_ptr)) == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640 dn_db = dn_dev_create(dev, &err);
641 if (!dn_db)
642 return err;
643 }
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900644
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 if ((ifa = dn_dev_alloc_ifa()) == NULL)
646 return -ENOBUFS;
647
Thomas Graf4a89c252006-11-24 17:14:51 -0800648 if (tb[IFA_ADDRESS] == NULL)
649 tb[IFA_ADDRESS] = tb[IFA_LOCAL];
650
651 ifa->ifa_local = nla_get_le16(tb[IFA_LOCAL]);
652 ifa->ifa_address = nla_get_le16(tb[IFA_ADDRESS]);
Jiri Pirko9a32b862013-12-08 12:16:09 +0100653 ifa->ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) :
654 ifm->ifa_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 ifa->ifa_scope = ifm->ifa_scope;
656 ifa->ifa_dev = dn_db;
Thomas Graf4a89c252006-11-24 17:14:51 -0800657
658 if (tb[IFA_LABEL])
659 nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660 else
661 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
662
Thomas Graf4a89c252006-11-24 17:14:51 -0800663 err = dn_dev_insert_ifa(dn_db, ifa);
664 if (err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665 dn_dev_free_ifa(ifa);
Thomas Graf4a89c252006-11-24 17:14:51 -0800666
667 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668}
669
Thomas Grafa6f01ca2006-11-24 17:14:07 -0800670static inline size_t dn_ifaddr_nlmsg_size(void)
671{
672 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
673 + nla_total_size(IFNAMSIZ) /* IFA_LABEL */
674 + nla_total_size(2) /* IFA_ADDRESS */
Jiri Pirko9a32b862013-12-08 12:16:09 +0100675 + nla_total_size(2) /* IFA_LOCAL */
676 + nla_total_size(4); /* IFA_FLAGS */
Thomas Grafa6f01ca2006-11-24 17:14:07 -0800677}
678
Thomas Graf4a89c252006-11-24 17:14:51 -0800679static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa,
Eric W. Biederman15e47302012-09-07 20:12:54 +0000680 u32 portid, u32 seq, int event, unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681{
682 struct ifaddrmsg *ifm;
683 struct nlmsghdr *nlh;
Jiri Pirko9a32b862013-12-08 12:16:09 +0100684 u32 ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685
Eric W. Biederman15e47302012-09-07 20:12:54 +0000686 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*ifm), flags);
Thomas Graf4a89c252006-11-24 17:14:51 -0800687 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -0800688 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689
Thomas Graf4a89c252006-11-24 17:14:51 -0800690 ifm = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691 ifm->ifa_family = AF_DECnet;
692 ifm->ifa_prefixlen = 16;
Jiri Pirko9a32b862013-12-08 12:16:09 +0100693 ifm->ifa_flags = ifa_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694 ifm->ifa_scope = ifa->ifa_scope;
695 ifm->ifa_index = ifa->ifa_dev->dev->ifindex;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696
David S. Millerb21dddb2012-04-01 20:15:14 -0400697 if ((ifa->ifa_address &&
698 nla_put_le16(skb, IFA_ADDRESS, ifa->ifa_address)) ||
699 (ifa->ifa_local &&
700 nla_put_le16(skb, IFA_LOCAL, ifa->ifa_local)) ||
701 (ifa->ifa_label[0] &&
Jiri Pirko9a32b862013-12-08 12:16:09 +0100702 nla_put_string(skb, IFA_LABEL, ifa->ifa_label)) ||
703 nla_put_u32(skb, IFA_FLAGS, ifa_flags))
David S. Millerb21dddb2012-04-01 20:15:14 -0400704 goto nla_put_failure;
Johannes Berg053c0952015-01-16 22:09:00 +0100705 nlmsg_end(skb, nlh);
706 return 0;
Thomas Graf4a89c252006-11-24 17:14:51 -0800707
708nla_put_failure:
Patrick McHardy26932562007-01-31 23:16:40 -0800709 nlmsg_cancel(skb, nlh);
710 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711}
712
Thomas Grafb020b942006-11-24 17:14:31 -0800713static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714{
715 struct sk_buff *skb;
Thomas Grafdc738dd2006-08-15 00:33:35 -0700716 int err = -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717
Thomas Grafa6f01ca2006-11-24 17:14:07 -0800718 skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL);
Thomas Grafdc738dd2006-08-15 00:33:35 -0700719 if (skb == NULL)
720 goto errout;
721
Thomas Graf4a89c252006-11-24 17:14:51 -0800722 err = dn_nl_fill_ifaddr(skb, ifa, 0, 0, event, 0);
Patrick McHardy26932562007-01-31 23:16:40 -0800723 if (err < 0) {
724 /* -EMSGSIZE implies BUG in dn_ifaddr_nlmsg_size() */
725 WARN_ON(err == -EMSGSIZE);
726 kfree_skb(skb);
727 goto errout;
728 }
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -0800729 rtnl_notify(skb, &init_net, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL);
730 return;
Thomas Grafdc738dd2006-08-15 00:33:35 -0700731errout:
732 if (err < 0)
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800733 rtnl_set_sk_err(&init_net, RTNLGRP_DECnet_IFADDR, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734}
735
Thomas Graf4a89c252006-11-24 17:14:51 -0800736static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900738 struct net *net = sock_net(skb->sk);
Thomas Graf4a89c252006-11-24 17:14:51 -0800739 int idx, dn_idx = 0, skip_ndevs, skip_naddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 struct net_device *dev;
741 struct dn_dev *dn_db;
742 struct dn_ifaddr *ifa;
743
Octavian Purdila09ad9bc2009-11-25 15:14:13 -0800744 if (!net_eq(net, &init_net))
Denis V. Lunevb8542722007-12-01 00:21:31 +1100745 return 0;
746
Thomas Graf4a89c252006-11-24 17:14:51 -0800747 skip_ndevs = cb->args[0];
748 skip_naddr = cb->args[1];
749
Pavel Emelianov7562f872007-05-03 15:13:45 -0700750 idx = 0;
Eric Dumazete67f88d2011-04-27 22:56:07 +0000751 rcu_read_lock();
752 for_each_netdev_rcu(&init_net, dev) {
Thomas Graf4a89c252006-11-24 17:14:51 -0800753 if (idx < skip_ndevs)
Pavel Emelianov7562f872007-05-03 15:13:45 -0700754 goto cont;
Thomas Graf4a89c252006-11-24 17:14:51 -0800755 else if (idx > skip_ndevs) {
756 /* Only skip over addresses for first dev dumped
757 * in this iteration (idx == skip_ndevs) */
758 skip_naddr = 0;
759 }
760
Eric Dumazete67f88d2011-04-27 22:56:07 +0000761 if ((dn_db = rcu_dereference(dev->dn_ptr)) == NULL)
Pavel Emelianov7562f872007-05-03 15:13:45 -0700762 goto cont;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763
Eric Dumazete67f88d2011-04-27 22:56:07 +0000764 for (ifa = rcu_dereference(dn_db->ifa_list), dn_idx = 0; ifa;
765 ifa = rcu_dereference(ifa->ifa_next), dn_idx++) {
Thomas Graf4a89c252006-11-24 17:14:51 -0800766 if (dn_idx < skip_naddr)
Patrick McHardya2221f32007-09-11 10:45:15 +0200767 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768
Eric W. Biederman15e47302012-09-07 20:12:54 +0000769 if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).portid,
Thomas Graf4a89c252006-11-24 17:14:51 -0800770 cb->nlh->nlmsg_seq, RTM_NEWADDR,
771 NLM_F_MULTI) < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772 goto done;
773 }
Pavel Emelianov7562f872007-05-03 15:13:45 -0700774cont:
775 idx++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776 }
777done:
Eric Dumazete67f88d2011-04-27 22:56:07 +0000778 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 cb->args[0] = idx;
780 cb->args[1] = dn_idx;
781
782 return skb->len;
783}
784
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800785static int dn_dev_get_first(struct net_device *dev, __le16 *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786{
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000787 struct dn_dev *dn_db;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788 struct dn_ifaddr *ifa;
789 int rv = -ENODEV;
stephen hemminger41bdecf2009-11-11 07:39:27 +0000790
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000791 rcu_read_lock();
792 dn_db = rcu_dereference(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793 if (dn_db == NULL)
794 goto out;
stephen hemminger41bdecf2009-11-11 07:39:27 +0000795
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000796 ifa = rcu_dereference(dn_db->ifa_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797 if (ifa != NULL) {
798 *addr = ifa->ifa_local;
799 rv = 0;
800 }
801out:
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000802 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803 return rv;
804}
805
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900806/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807 * Find a default address to bind to.
808 *
809 * This is one of those areas where the initial VMS concepts don't really
810 * map onto the Linux concepts, and since we introduced multiple addresses
811 * per interface we have to cope with slightly odd ways of finding out what
812 * "our address" really is. Mostly it's not a problem; for this we just guess
813 * a sensible default. Eventually the routing code will take care of all the
814 * nasties for us I hope.
815 */
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800816int dn_dev_bind_default(__le16 *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817{
818 struct net_device *dev;
819 int rv;
820 dev = dn_dev_get_default();
821last_chance:
822 if (dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823 rv = dn_dev_get_first(dev, addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824 dev_put(dev);
Eric W. Biederman2774c7a2007-09-26 22:10:56 -0700825 if (rv == 0 || dev == init_net.loopback_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826 return rv;
827 }
Eric W. Biederman2774c7a2007-09-26 22:10:56 -0700828 dev = init_net.loopback_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829 dev_hold(dev);
830 goto last_chance;
831}
832
833static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa)
834{
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900835 struct endnode_hello_message *msg;
836 struct sk_buff *skb = NULL;
837 __le16 *pktlen;
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000838 struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900840 if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841 return;
842
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900843 skb->dev = dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900845 msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900847 msg->msgflg = 0x0D;
848 memcpy(msg->tiver, dn_eco_version, 3);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849 dn_dn2eth(msg->id, ifa->ifa_local);
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900850 msg->iinfo = DN_RT_INFO_ENDN;
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800851 msg->blksize = cpu_to_le16(mtu2blksize(dev));
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900852 msg->area = 0x00;
853 memset(msg->seed, 0, 8);
854 memcpy(msg->neighbor, dn_hiord, ETH_ALEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855
856 if (dn_db->router) {
857 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
858 dn_dn2eth(msg->neighbor, dn->addr);
859 }
860
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800861 msg->timer = cpu_to_le16((unsigned short)dn_db->parms.t3);
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900862 msg->mpd = 0x00;
863 msg->datalen = 0x02;
864 memset(msg->data, 0xAA, 2);
865
866 pktlen = (__le16 *)skb_push(skb,2);
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800867 *pktlen = cpu_to_le16(skb->len - 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868
Arnaldo Carvalho de Meloc1d2bbe2007-04-10 20:45:18 -0700869 skb_reset_network_header(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870
871 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id);
872}
873
874
875#define DRDELAY (5 * HZ)
876
877static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa)
878{
879 /* First check time since device went up */
Himangi Saraogib5c5c362014-08-20 23:13:07 +0530880 if (time_before(jiffies, dn_db->uptime + DRDELAY))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881 return 0;
882
883 /* If there is no router, then yes... */
884 if (!dn_db->router)
885 return 1;
886
887 /* otherwise only if we have a higher priority or.. */
888 if (dn->priority < dn_db->parms.priority)
889 return 1;
890
891 /* if we have equal priority and a higher node number */
892 if (dn->priority != dn_db->parms.priority)
893 return 0;
894
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800895 if (le16_to_cpu(dn->addr) < le16_to_cpu(ifa->ifa_local))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896 return 1;
897
898 return 0;
899}
900
901static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa)
902{
903 int n;
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000904 struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
906 struct sk_buff *skb;
907 size_t size;
908 unsigned char *ptr;
909 unsigned char *i1, *i2;
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800910 __le16 *pktlen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911 char *src;
912
913 if (mtu2blksize(dev) < (26 + 7))
914 return;
915
916 n = mtu2blksize(dev) - 26;
917 n /= 7;
918
919 if (n > 32)
920 n = 32;
921
922 size = 2 + 26 + 7 * n;
923
924 if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL)
925 return;
926
927 skb->dev = dev;
928 ptr = skb_put(skb, size);
929
930 *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH;
931 *ptr++ = 2; /* ECO */
932 *ptr++ = 0;
933 *ptr++ = 0;
934 dn_dn2eth(ptr, ifa->ifa_local);
935 src = ptr;
936 ptr += ETH_ALEN;
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900937 *ptr++ = dn_db->parms.forwarding == 1 ?
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938 DN_RT_INFO_L1RT : DN_RT_INFO_L2RT;
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800939 *((__le16 *)ptr) = cpu_to_le16(mtu2blksize(dev));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940 ptr += 2;
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900941 *ptr++ = dn_db->parms.priority; /* Priority */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942 *ptr++ = 0; /* Area: Reserved */
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800943 *((__le16 *)ptr) = cpu_to_le16((unsigned short)dn_db->parms.t3);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944 ptr += 2;
945 *ptr++ = 0; /* MPD: Reserved */
946 i1 = ptr++;
947 memset(ptr, 0, 7); /* Name: Reserved */
948 ptr += 7;
949 i2 = ptr++;
950
951 n = dn_neigh_elist(dev, ptr, n);
952
953 *i2 = 7 * n;
954 *i1 = 8 + *i2;
955
956 skb_trim(skb, (27 + *i2));
957
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800958 pktlen = (__le16 *)skb_push(skb, 2);
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800959 *pktlen = cpu_to_le16(skb->len - 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960
Arnaldo Carvalho de Meloc1d2bbe2007-04-10 20:45:18 -0700961 skb_reset_network_header(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962
963 if (dn_am_i_a_router(dn, dn_db, ifa)) {
964 struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC);
965 if (skb2) {
966 dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src);
967 }
968 }
969
970 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
971}
972
973static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa)
974{
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000975 struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976
977 if (dn_db->parms.forwarding == 0)
978 dn_send_endnode_hello(dev, ifa);
979 else
980 dn_send_router_hello(dev, ifa);
981}
982
983static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa)
984{
985 int tdlen = 16;
986 int size = dev->hard_header_len + 2 + 4 + tdlen;
987 struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC);
988 int i;
989 unsigned char *ptr;
990 char src[ETH_ALEN];
991
992 if (skb == NULL)
993 return ;
994
995 skb->dev = dev;
996 skb_push(skb, dev->hard_header_len);
997 ptr = skb_put(skb, 2 + 4 + tdlen);
998
999 *ptr++ = DN_RT_PKT_HELO;
Steven Whitehousec4ea94a2006-03-20 22:42:39 -08001000 *((__le16 *)ptr) = ifa->ifa_local;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001 ptr += 2;
1002 *ptr++ = tdlen;
1003
1004 for(i = 0; i < tdlen; i++)
1005 *ptr++ = 0252;
1006
1007 dn_dn2eth(src, ifa->ifa_local);
1008 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
1009}
1010
1011static int dn_eth_up(struct net_device *dev)
1012{
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001013 struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014
1015 if (dn_db->parms.forwarding == 0)
Jiri Pirko22bedad32010-04-01 21:22:57 +00001016 dev_mc_add(dev, dn_rt_all_end_mcast);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017 else
Jiri Pirko22bedad32010-04-01 21:22:57 +00001018 dev_mc_add(dev, dn_rt_all_rt_mcast);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019
Linus Torvalds1da177e2005-04-16 15:20:36 -07001020 dn_db->use_long = 1;
1021
1022 return 0;
1023}
1024
1025static void dn_eth_down(struct net_device *dev)
1026{
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001027 struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028
1029 if (dn_db->parms.forwarding == 0)
Jiri Pirko22bedad32010-04-01 21:22:57 +00001030 dev_mc_del(dev, dn_rt_all_end_mcast);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031 else
Jiri Pirko22bedad32010-04-01 21:22:57 +00001032 dev_mc_del(dev, dn_rt_all_rt_mcast);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033}
1034
1035static void dn_dev_set_timer(struct net_device *dev);
1036
1037static void dn_dev_timer_func(unsigned long arg)
1038{
1039 struct net_device *dev = (struct net_device *)arg;
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001040 struct dn_dev *dn_db;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001041 struct dn_ifaddr *ifa;
1042
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001043 rcu_read_lock();
1044 dn_db = rcu_dereference(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045 if (dn_db->t3 <= dn_db->parms.t2) {
1046 if (dn_db->parms.timer3) {
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001047 for (ifa = rcu_dereference(dn_db->ifa_list);
1048 ifa;
1049 ifa = rcu_dereference(ifa->ifa_next)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050 if (!(ifa->ifa_flags & IFA_F_SECONDARY))
1051 dn_db->parms.timer3(dev, ifa);
1052 }
1053 }
1054 dn_db->t3 = dn_db->parms.t3;
1055 } else {
1056 dn_db->t3 -= dn_db->parms.t2;
1057 }
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001058 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059 dn_dev_set_timer(dev);
1060}
1061
1062static void dn_dev_set_timer(struct net_device *dev)
1063{
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001064 struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065
1066 if (dn_db->parms.t2 > dn_db->parms.t3)
1067 dn_db->parms.t2 = dn_db->parms.t3;
1068
1069 dn_db->timer.data = (unsigned long)dev;
1070 dn_db->timer.function = dn_dev_timer_func;
1071 dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ);
1072
1073 add_timer(&dn_db->timer);
1074}
1075
Roel Kluin5eaa65b2008-12-10 15:18:31 -08001076static struct dn_dev *dn_dev_create(struct net_device *dev, int *err)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001077{
1078 int i;
1079 struct dn_dev_parms *p = dn_dev_list;
1080 struct dn_dev *dn_db;
1081
1082 for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) {
1083 if (p->type == dev->type)
1084 break;
1085 }
1086
1087 *err = -ENODEV;
1088 if (i == DN_DEV_LIST_SIZE)
1089 return NULL;
1090
1091 *err = -ENOBUFS;
Panagiotis Issaris0da974f2006-07-21 14:51:30 -07001092 if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093 return NULL;
1094
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095 memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms));
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001096
Eric Dumazetcf778b02012-01-12 04:41:32 +00001097 rcu_assign_pointer(dev->dn_ptr, dn_db);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098 dn_db->dev = dev;
1099 init_timer(&dn_db->timer);
1100
1101 dn_db->uptime = jiffies;
Eric W. Biederman95743de2007-01-25 15:51:51 -08001102
1103 dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table);
1104 if (!dn_db->neigh_parms) {
Stephen Hemmingera9b3cd72011-08-01 16:19:00 +00001105 RCU_INIT_POINTER(dev->dn_ptr, NULL);
Eric W. Biederman95743de2007-01-25 15:51:51 -08001106 kfree(dn_db);
1107 return NULL;
1108 }
1109
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110 if (dn_db->parms.up) {
1111 if (dn_db->parms.up(dev) < 0) {
Eric W. Biederman95743de2007-01-25 15:51:51 -08001112 neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113 dev->dn_ptr = NULL;
1114 kfree(dn_db);
1115 return NULL;
1116 }
1117 }
1118
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119 dn_dev_sysctl_register(dev, &dn_db->parms);
1120
1121 dn_dev_set_timer(dev);
1122
1123 *err = 0;
1124 return dn_db;
1125}
1126
1127
1128/*
1129 * This processes a device up event. We only start up
1130 * the loopback device & ethernet devices with correct
Uwe Kleine-Königb5950762010-11-01 15:38:34 -04001131 * MAC addresses automatically. Others must be started
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132 * specifically.
1133 *
1134 * FIXME: How should we configure the loopback address ? If we could dispense
1135 * with using decnet_address here and for autobind, it will be one less thing
1136 * for users to worry about setting up.
1137 */
1138
1139void dn_dev_up(struct net_device *dev)
1140{
1141 struct dn_ifaddr *ifa;
Steven Whitehousec4ea94a2006-03-20 22:42:39 -08001142 __le16 addr = decnet_address;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001143 int maybe_default = 0;
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001144 struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145
1146 if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK))
1147 return;
1148
1149 /*
1150 * Need to ensure that loopback device has a dn_db attached to it
1151 * to allow creation of neighbours against it, even though it might
1152 * not have a local address of its own. Might as well do the same for
1153 * all autoconfigured interfaces.
1154 */
1155 if (dn_db == NULL) {
1156 int err;
1157 dn_db = dn_dev_create(dev, &err);
1158 if (dn_db == NULL)
1159 return;
1160 }
1161
1162 if (dev->type == ARPHRD_ETHER) {
1163 if (memcmp(dev->dev_addr, dn_hiord, 4) != 0)
1164 return;
Steven Whitehousec4ea94a2006-03-20 22:42:39 -08001165 addr = dn_eth2dn(dev->dev_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166 maybe_default = 1;
1167 }
1168
1169 if (addr == 0)
1170 return;
1171
1172 if ((ifa = dn_dev_alloc_ifa()) == NULL)
1173 return;
1174
1175 ifa->ifa_local = ifa->ifa_address = addr;
1176 ifa->ifa_flags = 0;
1177 ifa->ifa_scope = RT_SCOPE_UNIVERSE;
1178 strcpy(ifa->ifa_label, dev->name);
1179
1180 dn_dev_set_ifa(dev, ifa);
1181
1182 /*
1183 * Automagically set the default device to the first automatically
1184 * configured ethernet card in the system.
1185 */
1186 if (maybe_default) {
1187 dev_hold(dev);
1188 if (dn_dev_set_default(dev, 0))
1189 dev_put(dev);
1190 }
1191}
1192
1193static void dn_dev_delete(struct net_device *dev)
1194{
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001195 struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196
1197 if (dn_db == NULL)
1198 return;
1199
1200 del_timer_sync(&dn_db->timer);
1201 dn_dev_sysctl_unregister(&dn_db->parms);
1202 dn_dev_check_default(dev);
1203 neigh_ifdown(&dn_neigh_table, dev);
1204
1205 if (dn_db->parms.down)
1206 dn_db->parms.down(dev);
1207
1208 dev->dn_ptr = NULL;
1209
1210 neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
1211 neigh_ifdown(&dn_neigh_table, dev);
1212
1213 if (dn_db->router)
1214 neigh_release(dn_db->router);
1215 if (dn_db->peer)
1216 neigh_release(dn_db->peer);
1217
1218 kfree(dn_db);
1219}
1220
1221void dn_dev_down(struct net_device *dev)
1222{
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001223 struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224 struct dn_ifaddr *ifa;
1225
1226 if (dn_db == NULL)
1227 return;
1228
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001229 while ((ifa = rtnl_dereference(dn_db->ifa_list)) != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230 dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0);
1231 dn_dev_free_ifa(ifa);
1232 }
1233
1234 dn_dev_delete(dev);
1235}
1236
1237void dn_dev_init_pkt(struct sk_buff *skb)
1238{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239}
1240
1241void dn_dev_veri_pkt(struct sk_buff *skb)
1242{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243}
1244
1245void dn_dev_hello(struct sk_buff *skb)
1246{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247}
1248
1249void dn_dev_devices_off(void)
1250{
1251 struct net_device *dev;
1252
1253 rtnl_lock();
Eric W. Biederman881d9662007-09-17 11:56:21 -07001254 for_each_netdev(&init_net, dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001255 dn_dev_down(dev);
1256 rtnl_unlock();
1257
1258}
1259
1260void dn_dev_devices_on(void)
1261{
1262 struct net_device *dev;
1263
1264 rtnl_lock();
Eric W. Biederman881d9662007-09-17 11:56:21 -07001265 for_each_netdev(&init_net, dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266 if (dev->flags & IFF_UP)
1267 dn_dev_up(dev);
1268 }
1269 rtnl_unlock();
1270}
1271
1272int register_dnaddr_notifier(struct notifier_block *nb)
1273{
Alan Sterne041c682006-03-27 01:16:30 -08001274 return blocking_notifier_chain_register(&dnaddr_chain, nb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275}
1276
1277int unregister_dnaddr_notifier(struct notifier_block *nb)
1278{
Alan Sterne041c682006-03-27 01:16:30 -08001279 return blocking_notifier_chain_unregister(&dnaddr_chain, nb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001280}
1281
1282#ifdef CONFIG_PROC_FS
Pavel Emelianov7562f872007-05-03 15:13:45 -07001283static inline int is_dn_dev(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001284{
Pavel Emelianov7562f872007-05-03 15:13:45 -07001285 return dev->dn_ptr != NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001286}
1287
1288static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos)
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001289 __acquires(RCU)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290{
Pavel Emelianov7562f872007-05-03 15:13:45 -07001291 int i;
1292 struct net_device *dev;
1293
stephen hemmingerfa918602009-11-10 07:54:53 +00001294 rcu_read_lock();
Pavel Emelianov7562f872007-05-03 15:13:45 -07001295
1296 if (*pos == 0)
1297 return SEQ_START_TOKEN;
1298
1299 i = 1;
stephen hemmingerfa918602009-11-10 07:54:53 +00001300 for_each_netdev_rcu(&init_net, dev) {
Pavel Emelianov7562f872007-05-03 15:13:45 -07001301 if (!is_dn_dev(dev))
1302 continue;
1303
1304 if (i++ == *pos)
1305 return dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306 }
Pavel Emelianov7562f872007-05-03 15:13:45 -07001307
1308 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309}
1310
1311static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1312{
Pavel Emelianov7562f872007-05-03 15:13:45 -07001313 struct net_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001314
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315 ++*pos;
Pavel Emelianov7562f872007-05-03 15:13:45 -07001316
Joe Perchesea110732011-06-13 16:21:26 +00001317 dev = v;
Pavel Emelianov7562f872007-05-03 15:13:45 -07001318 if (v == SEQ_START_TOKEN)
Eric W. Biederman881d9662007-09-17 11:56:21 -07001319 dev = net_device_entry(&init_net.dev_base_head);
Pavel Emelianov7562f872007-05-03 15:13:45 -07001320
stephen hemmingerfa918602009-11-10 07:54:53 +00001321 for_each_netdev_continue_rcu(&init_net, dev) {
Pavel Emelianov7562f872007-05-03 15:13:45 -07001322 if (!is_dn_dev(dev))
1323 continue;
1324
1325 return dev;
1326 }
1327
1328 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329}
1330
1331static void dn_dev_seq_stop(struct seq_file *seq, void *v)
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001332 __releases(RCU)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001333{
stephen hemmingerfa918602009-11-10 07:54:53 +00001334 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001335}
1336
1337static char *dn_type2asc(char type)
1338{
Joe Perches06f8fe12011-07-01 09:43:03 +00001339 switch (type) {
1340 case DN_DEV_BCAST:
1341 return "B";
1342 case DN_DEV_UCAST:
1343 return "U";
1344 case DN_DEV_MPOINT:
1345 return "M";
Linus Torvalds1da177e2005-04-16 15:20:36 -07001346 }
1347
1348 return "?";
1349}
1350
1351static int dn_dev_seq_show(struct seq_file *seq, void *v)
1352{
1353 if (v == SEQ_START_TOKEN)
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +09001354 seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001355 else {
1356 struct net_device *dev = v;
1357 char peer_buf[DN_ASCBUF_LEN];
1358 char router_buf[DN_ASCBUF_LEN];
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001359 struct dn_dev *dn_db = rcu_dereference(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +09001361 seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu"
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362 " %04hu %03d %02x %-10s %-7s %-7s\n",
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +09001363 dev->name ? dev->name : "???",
1364 dn_type2asc(dn_db->parms.mode),
1365 0, 0,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001366 dn_db->t3, dn_db->parms.t3,
1367 mtu2blksize(dev),
1368 dn_db->parms.priority,
1369 dn_db->parms.state, dn_db->parms.name,
Harvey Harrisonc4106aa2008-11-27 00:12:47 -08001370 dn_db->router ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->router->primary_key), router_buf) : "",
1371 dn_db->peer ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->peer->primary_key), peer_buf) : "");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001372 }
1373 return 0;
1374}
1375
Philippe De Muyter56b3d972007-07-10 23:07:31 -07001376static const struct seq_operations dn_dev_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377 .start = dn_dev_seq_start,
1378 .next = dn_dev_seq_next,
1379 .stop = dn_dev_seq_stop,
1380 .show = dn_dev_seq_show,
1381};
1382
1383static int dn_dev_seq_open(struct inode *inode, struct file *file)
1384{
1385 return seq_open(file, &dn_dev_seq_ops);
1386}
1387
Arjan van de Ven9a321442007-02-12 00:55:35 -08001388static const struct file_operations dn_dev_seq_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001389 .owner = THIS_MODULE,
1390 .open = dn_dev_seq_open,
1391 .read = seq_read,
1392 .llseek = seq_lseek,
1393 .release = seq_release,
1394};
1395
1396#endif /* CONFIG_PROC_FS */
1397
Alexey Dobriyan4e058062007-11-05 21:30:11 -08001398static int addr[2];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001399module_param_array(addr, int, NULL, 0444);
1400MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node");
1401
1402void __init dn_dev_init(void)
1403{
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +09001404 if (addr[0] > 63 || addr[0] < 0) {
1405 printk(KERN_ERR "DECnet: Area must be between 0 and 63");
1406 return;
1407 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001408
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +09001409 if (addr[1] > 1023 || addr[1] < 0) {
1410 printk(KERN_ERR "DECnet: Node must be between 0 and 1023");
1411 return;
1412 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413
Harvey Harrisonc4106aa2008-11-27 00:12:47 -08001414 decnet_address = cpu_to_le16((addr[0] << 10) | addr[1]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415
1416 dn_dev_devices_on();
1417
Greg Rosec7ac8672011-06-10 01:27:09 +00001418 rtnl_register(PF_DECnet, RTM_NEWADDR, dn_nl_newaddr, NULL, NULL);
1419 rtnl_register(PF_DECnet, RTM_DELADDR, dn_nl_deladdr, NULL, NULL);
1420 rtnl_register(PF_DECnet, RTM_GETADDR, NULL, dn_nl_dump_ifaddr, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001421
Gao fengd4beaa62013-02-18 01:34:54 +00001422 proc_create("decnet_dev", S_IRUGO, init_net.proc_net, &dn_dev_seq_fops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001423
1424#ifdef CONFIG_SYSCTL
1425 {
1426 int i;
1427 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1428 dn_dev_sysctl_register(NULL, &dn_dev_list[i]);
1429 }
1430#endif /* CONFIG_SYSCTL */
1431}
1432
1433void __exit dn_dev_cleanup(void)
1434{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001435#ifdef CONFIG_SYSCTL
1436 {
1437 int i;
1438 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1439 dn_dev_sysctl_unregister(&dn_dev_list[i]);
1440 }
1441#endif /* CONFIG_SYSCTL */
1442
Gao fengece31ff2013-02-18 01:34:56 +00001443 remove_proc_entry("decnet_dev", init_net.proc_net);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001444
1445 dn_dev_devices_off();
1446}