blob: c00e3077988c07005a9633f859c1b76a54018ca8 [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>
Eric W. Biederman457c4cb2007-09-12 12:01:34 +020045#include <net/net_namespace.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#include <net/neighbour.h>
47#include <net/dst.h>
48#include <net/flow.h>
Steven Whitehousea8731cb2006-08-09 15:56:46 -070049#include <net/fib_rules.h>
Thomas Grafa6f01ca2006-11-24 17:14:07 -080050#include <net/netlink.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070051#include <net/dn.h>
52#include <net/dn_dev.h>
53#include <net/dn_route.h>
54#include <net/dn_neigh.h>
55#include <net/dn_fib.h>
56
57#define DN_IFREQ_SIZE (sizeof(struct ifreq) - sizeof(struct sockaddr) + sizeof(struct sockaddr_dn))
58
59static char dn_rt_all_end_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x04,0x00,0x00};
60static char dn_rt_all_rt_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x03,0x00,0x00};
61static char dn_hiord[ETH_ALEN] = {0xAA,0x00,0x04,0x00,0x00,0x00};
62static unsigned char dn_eco_version[3] = {0x02,0x00,0x00};
63
64extern struct neigh_table dn_neigh_table;
65
66/*
67 * decnet_address is kept in network order.
68 */
Steven Whitehousec4ea94a2006-03-20 22:42:39 -080069__le16 decnet_address = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
stephen hemmingere5c140a2009-11-11 07:40:36 +000071static DEFINE_SPINLOCK(dndev_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -070072static struct net_device *decnet_default_device;
Alan Sterne041c682006-03-27 01:16:30 -080073static BLOCKING_NOTIFIER_HEAD(dnaddr_chain);
Linus Torvalds1da177e2005-04-16 15:20:36 -070074
75static struct dn_dev *dn_dev_create(struct net_device *dev, int *err);
76static void dn_dev_delete(struct net_device *dev);
Thomas Grafb020b942006-11-24 17:14:31 -080077static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa);
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
79static int dn_eth_up(struct net_device *);
80static void dn_eth_down(struct net_device *);
81static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa);
82static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa);
83
84static struct dn_dev_parms dn_dev_list[] = {
85{
86 .type = ARPHRD_ETHER, /* Ethernet */
87 .mode = DN_DEV_BCAST,
88 .state = DN_DEV_S_RU,
89 .t2 = 1,
90 .t3 = 10,
91 .name = "ethernet",
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 .up = dn_eth_up,
93 .down = dn_eth_down,
94 .timer3 = dn_send_brd_hello,
95},
96{
97 .type = ARPHRD_IPGRE, /* DECnet tunneled over GRE in IP */
98 .mode = DN_DEV_BCAST,
99 .state = DN_DEV_S_RU,
100 .t2 = 1,
101 .t3 = 10,
102 .name = "ipgre",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 .timer3 = dn_send_brd_hello,
104},
105#if 0
106{
107 .type = ARPHRD_X25, /* Bog standard X.25 */
108 .mode = DN_DEV_UCAST,
109 .state = DN_DEV_S_DS,
110 .t2 = 1,
111 .t3 = 120,
112 .name = "x25",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113 .timer3 = dn_send_ptp_hello,
114},
115#endif
116#if 0
117{
118 .type = ARPHRD_PPP, /* DECnet over PPP */
119 .mode = DN_DEV_BCAST,
120 .state = DN_DEV_S_RU,
121 .t2 = 1,
122 .t3 = 10,
123 .name = "ppp",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 .timer3 = dn_send_brd_hello,
125},
126#endif
127{
128 .type = ARPHRD_DDCMP, /* DECnet over DDCMP */
129 .mode = DN_DEV_UCAST,
130 .state = DN_DEV_S_DS,
131 .t2 = 1,
132 .t3 = 120,
133 .name = "ddcmp",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 .timer3 = dn_send_ptp_hello,
135},
136{
137 .type = ARPHRD_LOOPBACK, /* Loopback interface - always last */
138 .mode = DN_DEV_BCAST,
139 .state = DN_DEV_S_RU,
140 .t2 = 1,
141 .t3 = 10,
142 .name = "loopback",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 .timer3 = dn_send_brd_hello,
144}
145};
146
Denis Cheng8b14a532007-09-16 16:41:29 -0700147#define DN_DEV_LIST_SIZE ARRAY_SIZE(dn_dev_list)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148
David S. Miller8fa0b312008-10-15 15:59:50 -0700149#define DN_DEV_PARMS_OFFSET(x) offsetof(struct dn_dev_parms, x)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150
151#ifdef CONFIG_SYSCTL
152
153static int min_t2[] = { 1 };
154static int max_t2[] = { 60 }; /* No max specified, but this seems sensible */
155static int min_t3[] = { 1 };
156static int max_t3[] = { 8191 }; /* Must fit in 16 bits when multiplied by BCT3MULT or T3MULT */
157
158static int min_priority[1];
159static int max_priority[] = { 127 }; /* From DECnet spec */
160
Alexey Dobriyan8d65af72009-09-23 15:57:19 -0700161static int dn_forwarding_proc(ctl_table *, int,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 void __user *, size_t *, loff_t *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163static struct dn_dev_sysctl_table {
164 struct ctl_table_header *sysctl_header;
165 ctl_table dn_dev_vars[5];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166} dn_dev_sysctl = {
167 NULL,
168 {
169 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 .procname = "forwarding",
171 .data = (void *)DN_DEV_PARMS_OFFSET(forwarding),
172 .maxlen = sizeof(int),
173 .mode = 0644,
174 .proc_handler = dn_forwarding_proc,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 },
176 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 .procname = "priority",
178 .data = (void *)DN_DEV_PARMS_OFFSET(priority),
179 .maxlen = sizeof(int),
180 .mode = 0644,
181 .proc_handler = proc_dointvec_minmax,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 .extra1 = &min_priority,
183 .extra2 = &max_priority
184 },
185 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 .procname = "t2",
187 .data = (void *)DN_DEV_PARMS_OFFSET(t2),
188 .maxlen = sizeof(int),
189 .mode = 0644,
190 .proc_handler = proc_dointvec_minmax,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 .extra1 = &min_t2,
192 .extra2 = &max_t2
193 },
194 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 .procname = "t3",
196 .data = (void *)DN_DEV_PARMS_OFFSET(t3),
197 .maxlen = sizeof(int),
198 .mode = 0644,
199 .proc_handler = proc_dointvec_minmax,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 .extra1 = &min_t3,
201 .extra2 = &max_t3
202 },
203 {0}
204 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205};
206
207static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
208{
209 struct dn_dev_sysctl_table *t;
210 int i;
211
Pavel Emelyanov3151a9a2008-01-09 00:31:49 -0800212#define DN_CTL_PATH_DEV 3
213
214 struct ctl_path dn_ctl_path[] = {
Eric W. Biedermanf8572d82009-11-05 13:32:03 -0800215 { .procname = "net", },
216 { .procname = "decnet", },
217 { .procname = "conf", },
Pavel Emelyanov3151a9a2008-01-09 00:31:49 -0800218 { /* to be set */ },
219 { },
220 };
221
Arnaldo Carvalho de Meloc66b7212006-11-17 12:29:21 -0200222 t = kmemdup(&dn_dev_sysctl, sizeof(*t), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 if (t == NULL)
224 return;
225
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 for(i = 0; i < ARRAY_SIZE(t->dn_dev_vars) - 1; i++) {
227 long offset = (long)t->dn_dev_vars[i].data;
228 t->dn_dev_vars[i].data = ((char *)parms) + offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 }
230
231 if (dev) {
Pavel Emelyanov3151a9a2008-01-09 00:31:49 -0800232 dn_ctl_path[DN_CTL_PATH_DEV].procname = dev->name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 } else {
Pavel Emelyanov3151a9a2008-01-09 00:31:49 -0800234 dn_ctl_path[DN_CTL_PATH_DEV].procname = parms->name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 }
236
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 t->dn_dev_vars[0].extra1 = (void *)dev;
238
Pavel Emelyanov3151a9a2008-01-09 00:31:49 -0800239 t->sysctl_header = register_sysctl_paths(dn_ctl_path, t->dn_dev_vars);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 if (t->sysctl_header == NULL)
241 kfree(t);
242 else
243 parms->sysctl = t;
244}
245
246static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
247{
248 if (parms->sysctl) {
249 struct dn_dev_sysctl_table *t = parms->sysctl;
250 parms->sysctl = NULL;
251 unregister_sysctl_table(t->sysctl_header);
252 kfree(t);
253 }
254}
255
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900256static int dn_forwarding_proc(ctl_table *table, int write,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 void __user *buffer,
258 size_t *lenp, loff_t *ppos)
259{
260#ifdef CONFIG_DECNET_ROUTER
261 struct net_device *dev = table->extra1;
262 struct dn_dev *dn_db;
263 int err;
264 int tmp, old;
265
266 if (table->extra1 == NULL)
267 return -EINVAL;
268
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000269 dn_db = rcu_dereference_raw(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 old = dn_db->parms.forwarding;
271
Alexey Dobriyan8d65af72009-09-23 15:57:19 -0700272 err = proc_dointvec(table, write, buffer, lenp, ppos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273
274 if ((err >= 0) && write) {
275 if (dn_db->parms.forwarding < 0)
276 dn_db->parms.forwarding = 0;
277 if (dn_db->parms.forwarding > 2)
278 dn_db->parms.forwarding = 2;
279 /*
280 * What an ugly hack this is... its works, just. It
281 * would be nice if sysctl/proc were just that little
282 * bit more flexible so I don't have to write a special
283 * routine, or suffer hacks like this - SJW
284 */
285 tmp = dn_db->parms.forwarding;
286 dn_db->parms.forwarding = old;
287 if (dn_db->parms.down)
288 dn_db->parms.down(dev);
289 dn_db->parms.forwarding = tmp;
290 if (dn_db->parms.up)
291 dn_db->parms.up(dev);
292 }
293
294 return err;
295#else
296 return -EINVAL;
297#endif
298}
299
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300#else /* CONFIG_SYSCTL */
301static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
302{
303}
304static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
305{
306}
307
308#endif /* CONFIG_SYSCTL */
309
310static inline __u16 mtu2blksize(struct net_device *dev)
311{
312 u32 blksize = dev->mtu;
313 if (blksize > 0xffff)
314 blksize = 0xffff;
315
316 if (dev->type == ARPHRD_ETHER ||
317 dev->type == ARPHRD_PPP ||
318 dev->type == ARPHRD_IPGRE ||
319 dev->type == ARPHRD_LOOPBACK)
320 blksize -= 2;
321
322 return (__u16)blksize;
323}
324
325static struct dn_ifaddr *dn_dev_alloc_ifa(void)
326{
327 struct dn_ifaddr *ifa;
328
Panagiotis Issaris0da974f2006-07-21 14:51:30 -0700329 ifa = kzalloc(sizeof(*ifa), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330
331 return ifa;
332}
333
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000334static void dn_dev_free_ifa(struct dn_ifaddr *ifa)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335{
Lai Jiangshan1e547752011-03-15 18:10:12 +0800336 kfree_rcu(ifa, rcu);
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000337}
338
339static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr __rcu **ifap, int destroy)
340{
341 struct dn_ifaddr *ifa1 = rtnl_dereference(*ifap);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 unsigned char mac_addr[6];
343 struct net_device *dev = dn_db->dev;
344
345 ASSERT_RTNL();
346
347 *ifap = ifa1->ifa_next;
348
349 if (dn_db->dev->type == ARPHRD_ETHER) {
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800350 if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 dn_dn2eth(mac_addr, ifa1->ifa_local);
Jiri Pirko22bedad32010-04-01 21:22:57 +0000352 dev_mc_del(dev, mac_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 }
354 }
355
Thomas Grafb020b942006-11-24 17:14:31 -0800356 dn_ifaddr_notify(RTM_DELADDR, ifa1);
Alan Sterne041c682006-03-27 01:16:30 -0800357 blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 if (destroy) {
359 dn_dev_free_ifa(ifa1);
360
361 if (dn_db->ifa_list == NULL)
362 dn_dev_delete(dn_db->dev);
363 }
364}
365
366static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa)
367{
368 struct net_device *dev = dn_db->dev;
369 struct dn_ifaddr *ifa1;
370 unsigned char mac_addr[6];
371
372 ASSERT_RTNL();
373
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900374 /* Check for duplicates */
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000375 for (ifa1 = rtnl_dereference(dn_db->ifa_list);
376 ifa1 != NULL;
377 ifa1 = rtnl_dereference(ifa1->ifa_next)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 if (ifa1->ifa_local == ifa->ifa_local)
379 return -EEXIST;
380 }
381
382 if (dev->type == ARPHRD_ETHER) {
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800383 if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 dn_dn2eth(mac_addr, ifa->ifa_local);
Jiri Pirko22bedad32010-04-01 21:22:57 +0000385 dev_mc_add(dev, mac_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 }
387 }
388
389 ifa->ifa_next = dn_db->ifa_list;
Eric Dumazetcf778b02012-01-12 04:41:32 +0000390 rcu_assign_pointer(dn_db->ifa_list, ifa);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391
Thomas Grafb020b942006-11-24 17:14:31 -0800392 dn_ifaddr_notify(RTM_NEWADDR, ifa);
Alan Sterne041c682006-03-27 01:16:30 -0800393 blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394
395 return 0;
396}
397
398static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa)
399{
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000400 struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 int rv;
402
403 if (dn_db == NULL) {
404 int err;
405 dn_db = dn_dev_create(dev, &err);
406 if (dn_db == NULL)
407 return err;
408 }
409
410 ifa->ifa_dev = dn_db;
411
412 if (dev->flags & IFF_LOOPBACK)
413 ifa->ifa_scope = RT_SCOPE_HOST;
414
415 rv = dn_dev_insert_ifa(dn_db, ifa);
416 if (rv)
417 dn_dev_free_ifa(ifa);
418 return rv;
419}
420
421
422int dn_dev_ioctl(unsigned int cmd, void __user *arg)
423{
424 char buffer[DN_IFREQ_SIZE];
425 struct ifreq *ifr = (struct ifreq *)buffer;
426 struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr;
427 struct dn_dev *dn_db;
428 struct net_device *dev;
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000429 struct dn_ifaddr *ifa = NULL;
430 struct dn_ifaddr __rcu **ifap = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 int ret = 0;
432
433 if (copy_from_user(ifr, arg, DN_IFREQ_SIZE))
434 return -EFAULT;
435 ifr->ifr_name[IFNAMSIZ-1] = 0;
436
Eric W. Biederman881d9662007-09-17 11:56:21 -0700437 dev_load(&init_net, ifr->ifr_name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438
Joe Perches06f8fe12011-07-01 09:43:03 +0000439 switch (cmd) {
440 case SIOCGIFADDR:
441 break;
442 case SIOCSIFADDR:
443 if (!capable(CAP_NET_ADMIN))
444 return -EACCES;
445 if (sdn->sdn_family != AF_DECnet)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 return -EINVAL;
Joe Perches06f8fe12011-07-01 09:43:03 +0000447 break;
448 default:
449 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450 }
451
452 rtnl_lock();
453
Eric W. Biederman881d9662007-09-17 11:56:21 -0700454 if ((dev = __dev_get_by_name(&init_net, ifr->ifr_name)) == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 ret = -ENODEV;
456 goto done;
457 }
458
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000459 if ((dn_db = rtnl_dereference(dev->dn_ptr)) != NULL) {
460 for (ifap = &dn_db->ifa_list;
461 (ifa = rtnl_dereference(*ifap)) != NULL;
462 ifap = &ifa->ifa_next)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463 if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0)
464 break;
465 }
466
467 if (ifa == NULL && cmd != SIOCSIFADDR) {
468 ret = -EADDRNOTAVAIL;
469 goto done;
470 }
471
Joe Perches06f8fe12011-07-01 09:43:03 +0000472 switch (cmd) {
473 case SIOCGIFADDR:
474 *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local;
475 goto rarok;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476
Joe Perches06f8fe12011-07-01 09:43:03 +0000477 case SIOCSIFADDR:
478 if (!ifa) {
479 if ((ifa = dn_dev_alloc_ifa()) == NULL) {
480 ret = -ENOBUFS;
481 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 }
Joe Perches06f8fe12011-07-01 09:43:03 +0000483 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
484 } else {
485 if (ifa->ifa_local == dn_saddr2dn(sdn))
486 break;
487 dn_dev_del_ifa(dn_db, ifap, 0);
488 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489
Joe Perches06f8fe12011-07-01 09:43:03 +0000490 ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491
Joe Perches06f8fe12011-07-01 09:43:03 +0000492 ret = dn_dev_set_ifa(dev, ifa);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 }
494done:
495 rtnl_unlock();
496
497 return ret;
498rarok:
499 if (copy_to_user(arg, ifr, DN_IFREQ_SIZE))
500 ret = -EFAULT;
501 goto done;
502}
503
504struct net_device *dn_dev_get_default(void)
505{
506 struct net_device *dev;
stephen hemmingere5c140a2009-11-11 07:40:36 +0000507
508 spin_lock(&dndev_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 dev = decnet_default_device;
510 if (dev) {
511 if (dev->dn_ptr)
512 dev_hold(dev);
513 else
514 dev = NULL;
515 }
stephen hemmingere5c140a2009-11-11 07:40:36 +0000516 spin_unlock(&dndev_lock);
517
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 return dev;
519}
520
521int dn_dev_set_default(struct net_device *dev, int force)
522{
523 struct net_device *old = NULL;
524 int rv = -EBUSY;
525 if (!dev->dn_ptr)
526 return -ENODEV;
stephen hemmingere5c140a2009-11-11 07:40:36 +0000527
528 spin_lock(&dndev_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 if (force || decnet_default_device == NULL) {
530 old = decnet_default_device;
531 decnet_default_device = dev;
532 rv = 0;
533 }
stephen hemmingere5c140a2009-11-11 07:40:36 +0000534 spin_unlock(&dndev_lock);
535
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536 if (old)
Patrick Caulfield6a57b2e2006-03-29 13:57:31 -0800537 dev_put(old);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 return rv;
539}
540
541static void dn_dev_check_default(struct net_device *dev)
542{
stephen hemmingere5c140a2009-11-11 07:40:36 +0000543 spin_lock(&dndev_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544 if (dev == decnet_default_device) {
545 decnet_default_device = NULL;
546 } else {
547 dev = NULL;
548 }
stephen hemmingere5c140a2009-11-11 07:40:36 +0000549 spin_unlock(&dndev_lock);
550
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551 if (dev)
552 dev_put(dev);
553}
554
Eric Dumazetb4d745d2009-11-04 10:59:38 -0800555/*
556 * Called with RTNL
557 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558static struct dn_dev *dn_dev_by_index(int ifindex)
559{
560 struct net_device *dev;
561 struct dn_dev *dn_dev = NULL;
Eric Dumazetb4d745d2009-11-04 10:59:38 -0800562
563 dev = __dev_get_by_index(&init_net, ifindex);
564 if (dev)
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000565 dn_dev = rtnl_dereference(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566
567 return dn_dev;
568}
569
Patrick McHardyef7c79e2007-06-05 12:38:30 -0700570static const struct nla_policy dn_ifa_policy[IFA_MAX+1] = {
Thomas Graf4a89c252006-11-24 17:14:51 -0800571 [IFA_ADDRESS] = { .type = NLA_U16 },
572 [IFA_LOCAL] = { .type = NLA_U16 },
573 [IFA_LABEL] = { .type = NLA_STRING,
574 .len = IFNAMSIZ - 1 },
575};
576
577static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900579 struct net *net = sock_net(skb->sk);
Thomas Graf4a89c252006-11-24 17:14:51 -0800580 struct nlattr *tb[IFA_MAX+1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 struct dn_dev *dn_db;
Thomas Graf4a89c252006-11-24 17:14:51 -0800582 struct ifaddrmsg *ifm;
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000583 struct dn_ifaddr *ifa;
584 struct dn_ifaddr __rcu **ifap;
Denis V. Lunevb8542722007-12-01 00:21:31 +1100585 int err = -EINVAL;
586
Octavian Purdila09ad9bc2009-11-25 15:14:13 -0800587 if (!net_eq(net, &init_net))
Denis V. Lunevb8542722007-12-01 00:21:31 +1100588 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589
Thomas Graf4a89c252006-11-24 17:14:51 -0800590 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
591 if (err < 0)
592 goto errout;
593
Pavel Emelyanov3ccd8622007-11-30 23:43:31 +1100594 err = -ENODEV;
Thomas Graf4a89c252006-11-24 17:14:51 -0800595 ifm = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL)
Thomas Graf4a89c252006-11-24 17:14:51 -0800597 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598
Pavel Emelyanov3ccd8622007-11-30 23:43:31 +1100599 err = -EADDRNOTAVAIL;
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000600 for (ifap = &dn_db->ifa_list;
601 (ifa = rtnl_dereference(*ifap)) != NULL;
602 ifap = &ifa->ifa_next) {
Thomas Graf4a89c252006-11-24 17:14:51 -0800603 if (tb[IFA_LOCAL] &&
604 nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2))
605 continue;
606
607 if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 continue;
609
610 dn_dev_del_ifa(dn_db, ifap, 1);
611 return 0;
612 }
613
Thomas Graf4a89c252006-11-24 17:14:51 -0800614errout:
615 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616}
617
Thomas Graf4a89c252006-11-24 17:14:51 -0800618static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900620 struct net *net = sock_net(skb->sk);
Thomas Graf4a89c252006-11-24 17:14:51 -0800621 struct nlattr *tb[IFA_MAX+1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 struct net_device *dev;
623 struct dn_dev *dn_db;
Thomas Graf4a89c252006-11-24 17:14:51 -0800624 struct ifaddrmsg *ifm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 struct dn_ifaddr *ifa;
Thomas Graf4a89c252006-11-24 17:14:51 -0800626 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627
Octavian Purdila09ad9bc2009-11-25 15:14:13 -0800628 if (!net_eq(net, &init_net))
Denis V. Lunevb8542722007-12-01 00:21:31 +1100629 return -EINVAL;
630
Thomas Graf4a89c252006-11-24 17:14:51 -0800631 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
632 if (err < 0)
633 return err;
634
635 if (tb[IFA_LOCAL] == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636 return -EINVAL;
637
Thomas Graf4a89c252006-11-24 17:14:51 -0800638 ifm = nlmsg_data(nlh);
Eric W. Biederman881d9662007-09-17 11:56:21 -0700639 if ((dev = __dev_get_by_index(&init_net, ifm->ifa_index)) == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640 return -ENODEV;
641
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000642 if ((dn_db = rtnl_dereference(dev->dn_ptr)) == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643 dn_db = dn_dev_create(dev, &err);
644 if (!dn_db)
645 return err;
646 }
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900647
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648 if ((ifa = dn_dev_alloc_ifa()) == NULL)
649 return -ENOBUFS;
650
Thomas Graf4a89c252006-11-24 17:14:51 -0800651 if (tb[IFA_ADDRESS] == NULL)
652 tb[IFA_ADDRESS] = tb[IFA_LOCAL];
653
654 ifa->ifa_local = nla_get_le16(tb[IFA_LOCAL]);
655 ifa->ifa_address = nla_get_le16(tb[IFA_ADDRESS]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 ifa->ifa_flags = ifm->ifa_flags;
657 ifa->ifa_scope = ifm->ifa_scope;
658 ifa->ifa_dev = dn_db;
Thomas Graf4a89c252006-11-24 17:14:51 -0800659
660 if (tb[IFA_LABEL])
661 nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 else
663 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
664
Thomas Graf4a89c252006-11-24 17:14:51 -0800665 err = dn_dev_insert_ifa(dn_db, ifa);
666 if (err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667 dn_dev_free_ifa(ifa);
Thomas Graf4a89c252006-11-24 17:14:51 -0800668
669 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670}
671
Thomas Grafa6f01ca2006-11-24 17:14:07 -0800672static inline size_t dn_ifaddr_nlmsg_size(void)
673{
674 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
675 + nla_total_size(IFNAMSIZ) /* IFA_LABEL */
676 + nla_total_size(2) /* IFA_ADDRESS */
677 + nla_total_size(2); /* IFA_LOCAL */
678}
679
Thomas Graf4a89c252006-11-24 17:14:51 -0800680static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa,
681 u32 pid, u32 seq, int event, unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682{
683 struct ifaddrmsg *ifm;
684 struct nlmsghdr *nlh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685
Thomas Graf4a89c252006-11-24 17:14:51 -0800686 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*ifm), flags);
687 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;
693 ifm->ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT;
694 ifm->ifa_scope = ifa->ifa_scope;
695 ifm->ifa_index = ifa->ifa_dev->dev->ifindex;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696
Thomas Graf4a89c252006-11-24 17:14:51 -0800697 if (ifa->ifa_address)
698 NLA_PUT_LE16(skb, IFA_ADDRESS, ifa->ifa_address);
699 if (ifa->ifa_local)
700 NLA_PUT_LE16(skb, IFA_LOCAL, ifa->ifa_local);
701 if (ifa->ifa_label[0])
702 NLA_PUT_STRING(skb, IFA_LABEL, ifa->ifa_label);
703
704 return nlmsg_end(skb, nlh);
705
706nla_put_failure:
Patrick McHardy26932562007-01-31 23:16:40 -0800707 nlmsg_cancel(skb, nlh);
708 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709}
710
Thomas Grafb020b942006-11-24 17:14:31 -0800711static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712{
713 struct sk_buff *skb;
Thomas Grafdc738dd2006-08-15 00:33:35 -0700714 int err = -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715
Thomas Grafa6f01ca2006-11-24 17:14:07 -0800716 skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL);
Thomas Grafdc738dd2006-08-15 00:33:35 -0700717 if (skb == NULL)
718 goto errout;
719
Thomas Graf4a89c252006-11-24 17:14:51 -0800720 err = dn_nl_fill_ifaddr(skb, ifa, 0, 0, event, 0);
Patrick McHardy26932562007-01-31 23:16:40 -0800721 if (err < 0) {
722 /* -EMSGSIZE implies BUG in dn_ifaddr_nlmsg_size() */
723 WARN_ON(err == -EMSGSIZE);
724 kfree_skb(skb);
725 goto errout;
726 }
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -0800727 rtnl_notify(skb, &init_net, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL);
728 return;
Thomas Grafdc738dd2006-08-15 00:33:35 -0700729errout:
730 if (err < 0)
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800731 rtnl_set_sk_err(&init_net, RTNLGRP_DECnet_IFADDR, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732}
733
Thomas Graf4a89c252006-11-24 17:14:51 -0800734static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900736 struct net *net = sock_net(skb->sk);
Thomas Graf4a89c252006-11-24 17:14:51 -0800737 int idx, dn_idx = 0, skip_ndevs, skip_naddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738 struct net_device *dev;
739 struct dn_dev *dn_db;
740 struct dn_ifaddr *ifa;
741
Octavian Purdila09ad9bc2009-11-25 15:14:13 -0800742 if (!net_eq(net, &init_net))
Denis V. Lunevb8542722007-12-01 00:21:31 +1100743 return 0;
744
Thomas Graf4a89c252006-11-24 17:14:51 -0800745 skip_ndevs = cb->args[0];
746 skip_naddr = cb->args[1];
747
Pavel Emelianov7562f872007-05-03 15:13:45 -0700748 idx = 0;
Eric Dumazete67f88d2011-04-27 22:56:07 +0000749 rcu_read_lock();
750 for_each_netdev_rcu(&init_net, dev) {
Thomas Graf4a89c252006-11-24 17:14:51 -0800751 if (idx < skip_ndevs)
Pavel Emelianov7562f872007-05-03 15:13:45 -0700752 goto cont;
Thomas Graf4a89c252006-11-24 17:14:51 -0800753 else if (idx > skip_ndevs) {
754 /* Only skip over addresses for first dev dumped
755 * in this iteration (idx == skip_ndevs) */
756 skip_naddr = 0;
757 }
758
Eric Dumazete67f88d2011-04-27 22:56:07 +0000759 if ((dn_db = rcu_dereference(dev->dn_ptr)) == NULL)
Pavel Emelianov7562f872007-05-03 15:13:45 -0700760 goto cont;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761
Eric Dumazete67f88d2011-04-27 22:56:07 +0000762 for (ifa = rcu_dereference(dn_db->ifa_list), dn_idx = 0; ifa;
763 ifa = rcu_dereference(ifa->ifa_next), dn_idx++) {
Thomas Graf4a89c252006-11-24 17:14:51 -0800764 if (dn_idx < skip_naddr)
Patrick McHardya2221f32007-09-11 10:45:15 +0200765 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766
Thomas Graf4a89c252006-11-24 17:14:51 -0800767 if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid,
768 cb->nlh->nlmsg_seq, RTM_NEWADDR,
769 NLM_F_MULTI) < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770 goto done;
771 }
Pavel Emelianov7562f872007-05-03 15:13:45 -0700772cont:
773 idx++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774 }
775done:
Eric Dumazete67f88d2011-04-27 22:56:07 +0000776 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777 cb->args[0] = idx;
778 cb->args[1] = dn_idx;
779
780 return skb->len;
781}
782
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800783static int dn_dev_get_first(struct net_device *dev, __le16 *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784{
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000785 struct dn_dev *dn_db;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786 struct dn_ifaddr *ifa;
787 int rv = -ENODEV;
stephen hemminger41bdecf2009-11-11 07:39:27 +0000788
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000789 rcu_read_lock();
790 dn_db = rcu_dereference(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791 if (dn_db == NULL)
792 goto out;
stephen hemminger41bdecf2009-11-11 07:39:27 +0000793
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000794 ifa = rcu_dereference(dn_db->ifa_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795 if (ifa != NULL) {
796 *addr = ifa->ifa_local;
797 rv = 0;
798 }
799out:
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000800 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801 return rv;
802}
803
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900804/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805 * Find a default address to bind to.
806 *
807 * This is one of those areas where the initial VMS concepts don't really
808 * map onto the Linux concepts, and since we introduced multiple addresses
809 * per interface we have to cope with slightly odd ways of finding out what
810 * "our address" really is. Mostly it's not a problem; for this we just guess
811 * a sensible default. Eventually the routing code will take care of all the
812 * nasties for us I hope.
813 */
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800814int dn_dev_bind_default(__le16 *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815{
816 struct net_device *dev;
817 int rv;
818 dev = dn_dev_get_default();
819last_chance:
820 if (dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821 rv = dn_dev_get_first(dev, addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822 dev_put(dev);
Eric W. Biederman2774c7a2007-09-26 22:10:56 -0700823 if (rv == 0 || dev == init_net.loopback_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824 return rv;
825 }
Eric W. Biederman2774c7a2007-09-26 22:10:56 -0700826 dev = init_net.loopback_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827 dev_hold(dev);
828 goto last_chance;
829}
830
831static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa)
832{
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900833 struct endnode_hello_message *msg;
834 struct sk_buff *skb = NULL;
835 __le16 *pktlen;
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000836 struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900838 if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839 return;
840
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900841 skb->dev = dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900843 msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900845 msg->msgflg = 0x0D;
846 memcpy(msg->tiver, dn_eco_version, 3);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847 dn_dn2eth(msg->id, ifa->ifa_local);
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900848 msg->iinfo = DN_RT_INFO_ENDN;
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800849 msg->blksize = cpu_to_le16(mtu2blksize(dev));
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900850 msg->area = 0x00;
851 memset(msg->seed, 0, 8);
852 memcpy(msg->neighbor, dn_hiord, ETH_ALEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853
854 if (dn_db->router) {
855 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
856 dn_dn2eth(msg->neighbor, dn->addr);
857 }
858
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800859 msg->timer = cpu_to_le16((unsigned short)dn_db->parms.t3);
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900860 msg->mpd = 0x00;
861 msg->datalen = 0x02;
862 memset(msg->data, 0xAA, 2);
863
864 pktlen = (__le16 *)skb_push(skb,2);
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800865 *pktlen = cpu_to_le16(skb->len - 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866
Arnaldo Carvalho de Meloc1d2bbe2007-04-10 20:45:18 -0700867 skb_reset_network_header(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868
869 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id);
870}
871
872
873#define DRDELAY (5 * HZ)
874
875static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa)
876{
877 /* First check time since device went up */
878 if ((jiffies - dn_db->uptime) < DRDELAY)
879 return 0;
880
881 /* If there is no router, then yes... */
882 if (!dn_db->router)
883 return 1;
884
885 /* otherwise only if we have a higher priority or.. */
886 if (dn->priority < dn_db->parms.priority)
887 return 1;
888
889 /* if we have equal priority and a higher node number */
890 if (dn->priority != dn_db->parms.priority)
891 return 0;
892
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800893 if (le16_to_cpu(dn->addr) < le16_to_cpu(ifa->ifa_local))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894 return 1;
895
896 return 0;
897}
898
899static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa)
900{
901 int n;
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000902 struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
904 struct sk_buff *skb;
905 size_t size;
906 unsigned char *ptr;
907 unsigned char *i1, *i2;
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800908 __le16 *pktlen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909 char *src;
910
911 if (mtu2blksize(dev) < (26 + 7))
912 return;
913
914 n = mtu2blksize(dev) - 26;
915 n /= 7;
916
917 if (n > 32)
918 n = 32;
919
920 size = 2 + 26 + 7 * n;
921
922 if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL)
923 return;
924
925 skb->dev = dev;
926 ptr = skb_put(skb, size);
927
928 *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH;
929 *ptr++ = 2; /* ECO */
930 *ptr++ = 0;
931 *ptr++ = 0;
932 dn_dn2eth(ptr, ifa->ifa_local);
933 src = ptr;
934 ptr += ETH_ALEN;
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900935 *ptr++ = dn_db->parms.forwarding == 1 ?
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936 DN_RT_INFO_L1RT : DN_RT_INFO_L2RT;
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800937 *((__le16 *)ptr) = cpu_to_le16(mtu2blksize(dev));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938 ptr += 2;
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +0900939 *ptr++ = dn_db->parms.priority; /* Priority */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940 *ptr++ = 0; /* Area: Reserved */
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800941 *((__le16 *)ptr) = cpu_to_le16((unsigned short)dn_db->parms.t3);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942 ptr += 2;
943 *ptr++ = 0; /* MPD: Reserved */
944 i1 = ptr++;
945 memset(ptr, 0, 7); /* Name: Reserved */
946 ptr += 7;
947 i2 = ptr++;
948
949 n = dn_neigh_elist(dev, ptr, n);
950
951 *i2 = 7 * n;
952 *i1 = 8 + *i2;
953
954 skb_trim(skb, (27 + *i2));
955
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800956 pktlen = (__le16 *)skb_push(skb, 2);
Harvey Harrisonc4106aa2008-11-27 00:12:47 -0800957 *pktlen = cpu_to_le16(skb->len - 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958
Arnaldo Carvalho de Meloc1d2bbe2007-04-10 20:45:18 -0700959 skb_reset_network_header(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960
961 if (dn_am_i_a_router(dn, dn_db, ifa)) {
962 struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC);
963 if (skb2) {
964 dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src);
965 }
966 }
967
968 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
969}
970
971static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa)
972{
Eric Dumazetfc766e4c2010-10-29 03:09:24 +0000973 struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974
975 if (dn_db->parms.forwarding == 0)
976 dn_send_endnode_hello(dev, ifa);
977 else
978 dn_send_router_hello(dev, ifa);
979}
980
981static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa)
982{
983 int tdlen = 16;
984 int size = dev->hard_header_len + 2 + 4 + tdlen;
985 struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC);
986 int i;
987 unsigned char *ptr;
988 char src[ETH_ALEN];
989
990 if (skb == NULL)
991 return ;
992
993 skb->dev = dev;
994 skb_push(skb, dev->hard_header_len);
995 ptr = skb_put(skb, 2 + 4 + tdlen);
996
997 *ptr++ = DN_RT_PKT_HELO;
Steven Whitehousec4ea94a2006-03-20 22:42:39 -0800998 *((__le16 *)ptr) = ifa->ifa_local;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999 ptr += 2;
1000 *ptr++ = tdlen;
1001
1002 for(i = 0; i < tdlen; i++)
1003 *ptr++ = 0252;
1004
1005 dn_dn2eth(src, ifa->ifa_local);
1006 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
1007}
1008
1009static int dn_eth_up(struct net_device *dev)
1010{
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001011 struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012
1013 if (dn_db->parms.forwarding == 0)
Jiri Pirko22bedad32010-04-01 21:22:57 +00001014 dev_mc_add(dev, dn_rt_all_end_mcast);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001015 else
Jiri Pirko22bedad32010-04-01 21:22:57 +00001016 dev_mc_add(dev, dn_rt_all_rt_mcast);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017
Linus Torvalds1da177e2005-04-16 15:20:36 -07001018 dn_db->use_long = 1;
1019
1020 return 0;
1021}
1022
1023static void dn_eth_down(struct net_device *dev)
1024{
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001025 struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026
1027 if (dn_db->parms.forwarding == 0)
Jiri Pirko22bedad32010-04-01 21:22:57 +00001028 dev_mc_del(dev, dn_rt_all_end_mcast);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029 else
Jiri Pirko22bedad32010-04-01 21:22:57 +00001030 dev_mc_del(dev, dn_rt_all_rt_mcast);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031}
1032
1033static void dn_dev_set_timer(struct net_device *dev);
1034
1035static void dn_dev_timer_func(unsigned long arg)
1036{
1037 struct net_device *dev = (struct net_device *)arg;
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001038 struct dn_dev *dn_db;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039 struct dn_ifaddr *ifa;
1040
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001041 rcu_read_lock();
1042 dn_db = rcu_dereference(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043 if (dn_db->t3 <= dn_db->parms.t2) {
1044 if (dn_db->parms.timer3) {
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001045 for (ifa = rcu_dereference(dn_db->ifa_list);
1046 ifa;
1047 ifa = rcu_dereference(ifa->ifa_next)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048 if (!(ifa->ifa_flags & IFA_F_SECONDARY))
1049 dn_db->parms.timer3(dev, ifa);
1050 }
1051 }
1052 dn_db->t3 = dn_db->parms.t3;
1053 } else {
1054 dn_db->t3 -= dn_db->parms.t2;
1055 }
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001056 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057 dn_dev_set_timer(dev);
1058}
1059
1060static void dn_dev_set_timer(struct net_device *dev)
1061{
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001062 struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063
1064 if (dn_db->parms.t2 > dn_db->parms.t3)
1065 dn_db->parms.t2 = dn_db->parms.t3;
1066
1067 dn_db->timer.data = (unsigned long)dev;
1068 dn_db->timer.function = dn_dev_timer_func;
1069 dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ);
1070
1071 add_timer(&dn_db->timer);
1072}
1073
Roel Kluin5eaa65b2008-12-10 15:18:31 -08001074static struct dn_dev *dn_dev_create(struct net_device *dev, int *err)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075{
1076 int i;
1077 struct dn_dev_parms *p = dn_dev_list;
1078 struct dn_dev *dn_db;
1079
1080 for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) {
1081 if (p->type == dev->type)
1082 break;
1083 }
1084
1085 *err = -ENODEV;
1086 if (i == DN_DEV_LIST_SIZE)
1087 return NULL;
1088
1089 *err = -ENOBUFS;
Panagiotis Issaris0da974f2006-07-21 14:51:30 -07001090 if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091 return NULL;
1092
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093 memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms));
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001094
Eric Dumazetcf778b02012-01-12 04:41:32 +00001095 rcu_assign_pointer(dev->dn_ptr, dn_db);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096 dn_db->dev = dev;
1097 init_timer(&dn_db->timer);
1098
1099 dn_db->uptime = jiffies;
Eric W. Biederman95743de2007-01-25 15:51:51 -08001100
1101 dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table);
1102 if (!dn_db->neigh_parms) {
Stephen Hemmingera9b3cd72011-08-01 16:19:00 +00001103 RCU_INIT_POINTER(dev->dn_ptr, NULL);
Eric W. Biederman95743de2007-01-25 15:51:51 -08001104 kfree(dn_db);
1105 return NULL;
1106 }
1107
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108 if (dn_db->parms.up) {
1109 if (dn_db->parms.up(dev) < 0) {
Eric W. Biederman95743de2007-01-25 15:51:51 -08001110 neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111 dev->dn_ptr = NULL;
1112 kfree(dn_db);
1113 return NULL;
1114 }
1115 }
1116
Linus Torvalds1da177e2005-04-16 15:20:36 -07001117 dn_dev_sysctl_register(dev, &dn_db->parms);
1118
1119 dn_dev_set_timer(dev);
1120
1121 *err = 0;
1122 return dn_db;
1123}
1124
1125
1126/*
1127 * This processes a device up event. We only start up
1128 * the loopback device & ethernet devices with correct
Uwe Kleine-Königb5950762010-11-01 15:38:34 -04001129 * MAC addresses automatically. Others must be started
Linus Torvalds1da177e2005-04-16 15:20:36 -07001130 * specifically.
1131 *
1132 * FIXME: How should we configure the loopback address ? If we could dispense
1133 * with using decnet_address here and for autobind, it will be one less thing
1134 * for users to worry about setting up.
1135 */
1136
1137void dn_dev_up(struct net_device *dev)
1138{
1139 struct dn_ifaddr *ifa;
Steven Whitehousec4ea94a2006-03-20 22:42:39 -08001140 __le16 addr = decnet_address;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001141 int maybe_default = 0;
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001142 struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001143
1144 if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK))
1145 return;
1146
1147 /*
1148 * Need to ensure that loopback device has a dn_db attached to it
1149 * to allow creation of neighbours against it, even though it might
1150 * not have a local address of its own. Might as well do the same for
1151 * all autoconfigured interfaces.
1152 */
1153 if (dn_db == NULL) {
1154 int err;
1155 dn_db = dn_dev_create(dev, &err);
1156 if (dn_db == NULL)
1157 return;
1158 }
1159
1160 if (dev->type == ARPHRD_ETHER) {
1161 if (memcmp(dev->dev_addr, dn_hiord, 4) != 0)
1162 return;
Steven Whitehousec4ea94a2006-03-20 22:42:39 -08001163 addr = dn_eth2dn(dev->dev_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001164 maybe_default = 1;
1165 }
1166
1167 if (addr == 0)
1168 return;
1169
1170 if ((ifa = dn_dev_alloc_ifa()) == NULL)
1171 return;
1172
1173 ifa->ifa_local = ifa->ifa_address = addr;
1174 ifa->ifa_flags = 0;
1175 ifa->ifa_scope = RT_SCOPE_UNIVERSE;
1176 strcpy(ifa->ifa_label, dev->name);
1177
1178 dn_dev_set_ifa(dev, ifa);
1179
1180 /*
1181 * Automagically set the default device to the first automatically
1182 * configured ethernet card in the system.
1183 */
1184 if (maybe_default) {
1185 dev_hold(dev);
1186 if (dn_dev_set_default(dev, 0))
1187 dev_put(dev);
1188 }
1189}
1190
1191static void dn_dev_delete(struct net_device *dev)
1192{
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001193 struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194
1195 if (dn_db == NULL)
1196 return;
1197
1198 del_timer_sync(&dn_db->timer);
1199 dn_dev_sysctl_unregister(&dn_db->parms);
1200 dn_dev_check_default(dev);
1201 neigh_ifdown(&dn_neigh_table, dev);
1202
1203 if (dn_db->parms.down)
1204 dn_db->parms.down(dev);
1205
1206 dev->dn_ptr = NULL;
1207
1208 neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
1209 neigh_ifdown(&dn_neigh_table, dev);
1210
1211 if (dn_db->router)
1212 neigh_release(dn_db->router);
1213 if (dn_db->peer)
1214 neigh_release(dn_db->peer);
1215
1216 kfree(dn_db);
1217}
1218
1219void dn_dev_down(struct net_device *dev)
1220{
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001221 struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222 struct dn_ifaddr *ifa;
1223
1224 if (dn_db == NULL)
1225 return;
1226
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001227 while ((ifa = rtnl_dereference(dn_db->ifa_list)) != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001228 dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0);
1229 dn_dev_free_ifa(ifa);
1230 }
1231
1232 dn_dev_delete(dev);
1233}
1234
1235void dn_dev_init_pkt(struct sk_buff *skb)
1236{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001237}
1238
1239void dn_dev_veri_pkt(struct sk_buff *skb)
1240{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241}
1242
1243void dn_dev_hello(struct sk_buff *skb)
1244{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245}
1246
1247void dn_dev_devices_off(void)
1248{
1249 struct net_device *dev;
1250
1251 rtnl_lock();
Eric W. Biederman881d9662007-09-17 11:56:21 -07001252 for_each_netdev(&init_net, dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253 dn_dev_down(dev);
1254 rtnl_unlock();
1255
1256}
1257
1258void dn_dev_devices_on(void)
1259{
1260 struct net_device *dev;
1261
1262 rtnl_lock();
Eric W. Biederman881d9662007-09-17 11:56:21 -07001263 for_each_netdev(&init_net, dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264 if (dev->flags & IFF_UP)
1265 dn_dev_up(dev);
1266 }
1267 rtnl_unlock();
1268}
1269
1270int register_dnaddr_notifier(struct notifier_block *nb)
1271{
Alan Sterne041c682006-03-27 01:16:30 -08001272 return blocking_notifier_chain_register(&dnaddr_chain, nb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001273}
1274
1275int unregister_dnaddr_notifier(struct notifier_block *nb)
1276{
Alan Sterne041c682006-03-27 01:16:30 -08001277 return blocking_notifier_chain_unregister(&dnaddr_chain, nb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278}
1279
1280#ifdef CONFIG_PROC_FS
Pavel Emelianov7562f872007-05-03 15:13:45 -07001281static inline int is_dn_dev(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282{
Pavel Emelianov7562f872007-05-03 15:13:45 -07001283 return dev->dn_ptr != NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001284}
1285
1286static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos)
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001287 __acquires(RCU)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288{
Pavel Emelianov7562f872007-05-03 15:13:45 -07001289 int i;
1290 struct net_device *dev;
1291
stephen hemmingerfa918602009-11-10 07:54:53 +00001292 rcu_read_lock();
Pavel Emelianov7562f872007-05-03 15:13:45 -07001293
1294 if (*pos == 0)
1295 return SEQ_START_TOKEN;
1296
1297 i = 1;
stephen hemmingerfa918602009-11-10 07:54:53 +00001298 for_each_netdev_rcu(&init_net, dev) {
Pavel Emelianov7562f872007-05-03 15:13:45 -07001299 if (!is_dn_dev(dev))
1300 continue;
1301
1302 if (i++ == *pos)
1303 return dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001304 }
Pavel Emelianov7562f872007-05-03 15:13:45 -07001305
1306 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001307}
1308
1309static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1310{
Pavel Emelianov7562f872007-05-03 15:13:45 -07001311 struct net_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001312
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313 ++*pos;
Pavel Emelianov7562f872007-05-03 15:13:45 -07001314
Joe Perchesea110732011-06-13 16:21:26 +00001315 dev = v;
Pavel Emelianov7562f872007-05-03 15:13:45 -07001316 if (v == SEQ_START_TOKEN)
Eric W. Biederman881d9662007-09-17 11:56:21 -07001317 dev = net_device_entry(&init_net.dev_base_head);
Pavel Emelianov7562f872007-05-03 15:13:45 -07001318
stephen hemmingerfa918602009-11-10 07:54:53 +00001319 for_each_netdev_continue_rcu(&init_net, dev) {
Pavel Emelianov7562f872007-05-03 15:13:45 -07001320 if (!is_dn_dev(dev))
1321 continue;
1322
1323 return dev;
1324 }
1325
1326 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327}
1328
1329static void dn_dev_seq_stop(struct seq_file *seq, void *v)
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001330 __releases(RCU)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001331{
stephen hemmingerfa918602009-11-10 07:54:53 +00001332 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001333}
1334
1335static char *dn_type2asc(char type)
1336{
Joe Perches06f8fe12011-07-01 09:43:03 +00001337 switch (type) {
1338 case DN_DEV_BCAST:
1339 return "B";
1340 case DN_DEV_UCAST:
1341 return "U";
1342 case DN_DEV_MPOINT:
1343 return "M";
Linus Torvalds1da177e2005-04-16 15:20:36 -07001344 }
1345
1346 return "?";
1347}
1348
1349static int dn_dev_seq_show(struct seq_file *seq, void *v)
1350{
1351 if (v == SEQ_START_TOKEN)
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +09001352 seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001353 else {
1354 struct net_device *dev = v;
1355 char peer_buf[DN_ASCBUF_LEN];
1356 char router_buf[DN_ASCBUF_LEN];
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001357 struct dn_dev *dn_db = rcu_dereference(dev->dn_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +09001359 seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu"
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360 " %04hu %03d %02x %-10s %-7s %-7s\n",
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +09001361 dev->name ? dev->name : "???",
1362 dn_type2asc(dn_db->parms.mode),
1363 0, 0,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001364 dn_db->t3, dn_db->parms.t3,
1365 mtu2blksize(dev),
1366 dn_db->parms.priority,
1367 dn_db->parms.state, dn_db->parms.name,
Harvey Harrisonc4106aa2008-11-27 00:12:47 -08001368 dn_db->router ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->router->primary_key), router_buf) : "",
1369 dn_db->peer ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->peer->primary_key), peer_buf) : "");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370 }
1371 return 0;
1372}
1373
Philippe De Muyter56b3d972007-07-10 23:07:31 -07001374static const struct seq_operations dn_dev_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001375 .start = dn_dev_seq_start,
1376 .next = dn_dev_seq_next,
1377 .stop = dn_dev_seq_stop,
1378 .show = dn_dev_seq_show,
1379};
1380
1381static int dn_dev_seq_open(struct inode *inode, struct file *file)
1382{
1383 return seq_open(file, &dn_dev_seq_ops);
1384}
1385
Arjan van de Ven9a321442007-02-12 00:55:35 -08001386static const struct file_operations dn_dev_seq_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001387 .owner = THIS_MODULE,
1388 .open = dn_dev_seq_open,
1389 .read = seq_read,
1390 .llseek = seq_lseek,
1391 .release = seq_release,
1392};
1393
1394#endif /* CONFIG_PROC_FS */
1395
Alexey Dobriyan4e058062007-11-05 21:30:11 -08001396static int addr[2];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001397module_param_array(addr, int, NULL, 0444);
1398MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node");
1399
1400void __init dn_dev_init(void)
1401{
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +09001402 if (addr[0] > 63 || addr[0] < 0) {
1403 printk(KERN_ERR "DECnet: Area must be between 0 and 63");
1404 return;
1405 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001406
YOSHIFUJI Hideaki429eb0f2007-02-09 23:24:40 +09001407 if (addr[1] > 1023 || addr[1] < 0) {
1408 printk(KERN_ERR "DECnet: Node must be between 0 and 1023");
1409 return;
1410 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001411
Harvey Harrisonc4106aa2008-11-27 00:12:47 -08001412 decnet_address = cpu_to_le16((addr[0] << 10) | addr[1]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413
1414 dn_dev_devices_on();
1415
Greg Rosec7ac8672011-06-10 01:27:09 +00001416 rtnl_register(PF_DECnet, RTM_NEWADDR, dn_nl_newaddr, NULL, NULL);
1417 rtnl_register(PF_DECnet, RTM_DELADDR, dn_nl_deladdr, NULL, NULL);
1418 rtnl_register(PF_DECnet, RTM_GETADDR, NULL, dn_nl_dump_ifaddr, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001419
Eric W. Biederman457c4cb2007-09-12 12:01:34 +02001420 proc_net_fops_create(&init_net, "decnet_dev", S_IRUGO, &dn_dev_seq_fops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001421
1422#ifdef CONFIG_SYSCTL
1423 {
1424 int i;
1425 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1426 dn_dev_sysctl_register(NULL, &dn_dev_list[i]);
1427 }
1428#endif /* CONFIG_SYSCTL */
1429}
1430
1431void __exit dn_dev_cleanup(void)
1432{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001433#ifdef CONFIG_SYSCTL
1434 {
1435 int i;
1436 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1437 dn_dev_sysctl_unregister(&dn_dev_list[i]);
1438 }
1439#endif /* CONFIG_SYSCTL */
1440
Eric W. Biederman457c4cb2007-09-12 12:01:34 +02001441 proc_net_remove(&init_net, "decnet_dev");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001442
1443 dn_dev_devices_off();
1444}