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[DCCP]: Use kmemdup
[linux-2.6-block.git] / net / decnet / dn_dev.c
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1da177e4
LT		 1/*
2 * DECnet An implementation of the DECnet protocol suite for the LINUX
3 * operating system. DECnet is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * DECnet Device Layer
7 *
8 * Authors: Steve Whitehouse <SteveW@ACM.org>
9 * Eduardo Marcelo Serrat <emserrat@geocities.com>
10 *
11 * Changes:
12 * Steve Whitehouse : Devices now see incoming frames so they
13 * can mark on who it came from.
14 * Steve Whitehouse : Fixed bug in creating neighbours. Each neighbour
15 * can now have a device specific setup func.
16 * Steve Whitehouse : Added /proc/sys/net/decnet/conf/<dev>/
17 * Steve Whitehouse : Fixed bug which sometimes killed timer
18 * Steve Whitehouse : Multiple ifaddr support
19 * Steve Whitehouse : SIOCGIFCONF is now a compile time option
20 * Steve Whitehouse : /proc/sys/net/decnet/conf/<sys>/forwarding
21 * Steve Whitehouse : Removed timer1 - it's a user space issue now
22 * Patrick Caulfield : Fixed router hello message format
23 * Steve Whitehouse : Got rid of constant sizes for blksize for
24 * devices. All mtu based now.
25 */
26
4fc268d2 27#include <linux/capability.h>
1da177e4
LT		 28#include <linux/module.h>
29#include <linux/moduleparam.h>
30#include <linux/init.h>
31#include <linux/net.h>
32#include <linux/netdevice.h>
33#include <linux/proc_fs.h>
34#include <linux/seq_file.h>
35#include <linux/timer.h>
36#include <linux/string.h>
1823730f 37#include <linux/if_addr.h>
1da177e4
LT		 38#include <linux/if_arp.h>
39#include <linux/if_ether.h>
40#include <linux/skbuff.h>
41#include <linux/rtnetlink.h>
42#include <linux/sysctl.h>
43#include <linux/notifier.h>
44#include <asm/uaccess.h>
45#include <asm/system.h>
46#include <net/neighbour.h>
47#include <net/dst.h>
48#include <net/flow.h>
a8731cbf 49#include <net/fib_rules.h>
1da177e4
LT		 50#include <net/dn.h>
51#include <net/dn_dev.h>
52#include <net/dn_route.h>
53#include <net/dn_neigh.h>
54#include <net/dn_fib.h>
55
56#define DN_IFREQ_SIZE (sizeof(struct ifreq) - sizeof(struct sockaddr) + sizeof(struct sockaddr_dn))
57
58static char dn_rt_all_end_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x04,0x00,0x00};
59static char dn_rt_all_rt_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x03,0x00,0x00};
60static char dn_hiord[ETH_ALEN] = {0xAA,0x00,0x04,0x00,0x00,0x00};
61static unsigned char dn_eco_version[3] = {0x02,0x00,0x00};
62
63extern struct neigh_table dn_neigh_table;
64
65/*
66 * decnet_address is kept in network order.
67 */
c4ea94ab 68__le16 decnet_address = 0;
1da177e4
LT		 69
70static DEFINE_RWLOCK(dndev_lock);
71static struct net_device *decnet_default_device;
e041c683 72static BLOCKING_NOTIFIER_HEAD(dnaddr_chain);
1da177e4
LT		 73
74static struct dn_dev *dn_dev_create(struct net_device *dev, int *err);
75static void dn_dev_delete(struct net_device *dev);
76static void rtmsg_ifa(int event, struct dn_ifaddr *ifa);
77
78static int dn_eth_up(struct net_device *);
79static void dn_eth_down(struct net_device *);
80static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa);
81static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa);
82
83static struct dn_dev_parms dn_dev_list[] = {
84{
85 .type = ARPHRD_ETHER, /* Ethernet */
86 .mode = DN_DEV_BCAST,
87 .state = DN_DEV_S_RU,
88 .t2 = 1,
89 .t3 = 10,
90 .name = "ethernet",
91 .ctl_name = NET_DECNET_CONF_ETHER,
92 .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",
103 .ctl_name = NET_DECNET_CONF_GRE,
104 .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",
114 .ctl_name = NET_DECNET_CONF_X25,
115 .timer3 = dn_send_ptp_hello,
116},
117#endif
118#if 0
119{
120 .type = ARPHRD_PPP, /* DECnet over PPP */
121 .mode = DN_DEV_BCAST,
122 .state = DN_DEV_S_RU,
123 .t2 = 1,
124 .t3 = 10,
125 .name = "ppp",
126 .ctl_name = NET_DECNET_CONF_PPP,
127 .timer3 = dn_send_brd_hello,
128},
129#endif
130{
131 .type = ARPHRD_DDCMP, /* DECnet over DDCMP */
132 .mode = DN_DEV_UCAST,
133 .state = DN_DEV_S_DS,
134 .t2 = 1,
135 .t3 = 120,
136 .name = "ddcmp",
137 .ctl_name = NET_DECNET_CONF_DDCMP,
138 .timer3 = dn_send_ptp_hello,
139},
140{
141 .type = ARPHRD_LOOPBACK, /* Loopback interface - always last */
142 .mode = DN_DEV_BCAST,
143 .state = DN_DEV_S_RU,
144 .t2 = 1,
145 .t3 = 10,
146 .name = "loopback",
147 .ctl_name = NET_DECNET_CONF_LOOPBACK,
148 .timer3 = dn_send_brd_hello,
149}
150};
151
152#define DN_DEV_LIST_SIZE (sizeof(dn_dev_list)/sizeof(struct dn_dev_parms))
153
154#define DN_DEV_PARMS_OFFSET(x) ((int) ((char *) &((struct dn_dev_parms *)0)->x))
155
156#ifdef CONFIG_SYSCTL
157
158static int min_t2[] = { 1 };
159static int max_t2[] = { 60 }; /* No max specified, but this seems sensible */
160static int min_t3[] = { 1 };
161static int max_t3[] = { 8191 }; /* Must fit in 16 bits when multiplied by BCT3MULT or T3MULT */
162
163static int min_priority[1];
164static int max_priority[] = { 127 }; /* From DECnet spec */
165
166static int dn_forwarding_proc(ctl_table *, int, struct file *,
167 void __user *, size_t *, loff_t *);
168static int dn_forwarding_sysctl(ctl_table *table, int __user *name, int nlen,
169 void __user *oldval, size_t __user *oldlenp,
170 void __user *newval, size_t newlen,
171 void **context);
172
173static struct dn_dev_sysctl_table {
174 struct ctl_table_header *sysctl_header;
175 ctl_table dn_dev_vars[5];
176 ctl_table dn_dev_dev[2];
177 ctl_table dn_dev_conf_dir[2];
178 ctl_table dn_dev_proto_dir[2];
179 ctl_table dn_dev_root_dir[2];
180} dn_dev_sysctl = {
181 NULL,
182 {
183 {
184 .ctl_name = NET_DECNET_CONF_DEV_FORWARDING,
185 .procname = "forwarding",
186 .data = (void *)DN_DEV_PARMS_OFFSET(forwarding),
187 .maxlen = sizeof(int),
188 .mode = 0644,
189 .proc_handler = dn_forwarding_proc,
190 .strategy = dn_forwarding_sysctl,
191 },
192 {
193 .ctl_name = NET_DECNET_CONF_DEV_PRIORITY,
194 .procname = "priority",
195 .data = (void *)DN_DEV_PARMS_OFFSET(priority),
196 .maxlen = sizeof(int),
197 .mode = 0644,
198 .proc_handler = proc_dointvec_minmax,
199 .strategy = sysctl_intvec,
200 .extra1 = &min_priority,
201 .extra2 = &max_priority
202 },
203 {
204 .ctl_name = NET_DECNET_CONF_DEV_T2,
205 .procname = "t2",
206 .data = (void *)DN_DEV_PARMS_OFFSET(t2),
207 .maxlen = sizeof(int),
208 .mode = 0644,
209 .proc_handler = proc_dointvec_minmax,
210 .strategy = sysctl_intvec,
211 .extra1 = &min_t2,
212 .extra2 = &max_t2
213 },
214 {
215 .ctl_name = NET_DECNET_CONF_DEV_T3,
216 .procname = "t3",
217 .data = (void *)DN_DEV_PARMS_OFFSET(t3),
218 .maxlen = sizeof(int),
219 .mode = 0644,
220 .proc_handler = proc_dointvec_minmax,
221 .strategy = sysctl_intvec,
222 .extra1 = &min_t3,
223 .extra2 = &max_t3
224 },
225 {0}
226 },
227 {{
228 .ctl_name = 0,
229 .procname = "",
230 .mode = 0555,
231 .child = dn_dev_sysctl.dn_dev_vars
232 }, {0}},
233 {{
234 .ctl_name = NET_DECNET_CONF,
235 .procname = "conf",
236 .mode = 0555,
237 .child = dn_dev_sysctl.dn_dev_dev
238 }, {0}},
239 {{
240 .ctl_name = NET_DECNET,
241 .procname = "decnet",
242 .mode = 0555,
243 .child = dn_dev_sysctl.dn_dev_conf_dir
244 }, {0}},
245 {{
246 .ctl_name = CTL_NET,
247 .procname = "net",
248 .mode = 0555,
249 .child = dn_dev_sysctl.dn_dev_proto_dir
250 }, {0}}
251};
252
253static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
254{
255 struct dn_dev_sysctl_table *t;
256 int i;
257
258 t = kmalloc(sizeof(*t), GFP_KERNEL);
259 if (t == NULL)
260 return;
261
262 memcpy(t, &dn_dev_sysctl, sizeof(*t));
263
264 for(i = 0; i < ARRAY_SIZE(t->dn_dev_vars) - 1; i++) {
265 long offset = (long)t->dn_dev_vars[i].data;
266 t->dn_dev_vars[i].data = ((char *)parms) + offset;
267 t->dn_dev_vars[i].de = NULL;
268 }
269
270 if (dev) {
271 t->dn_dev_dev[0].procname = dev->name;
272 t->dn_dev_dev[0].ctl_name = dev->ifindex;
273 } else {
274 t->dn_dev_dev[0].procname = parms->name;
275 t->dn_dev_dev[0].ctl_name = parms->ctl_name;
276 }
277
278 t->dn_dev_dev[0].child = t->dn_dev_vars;
279 t->dn_dev_dev[0].de = NULL;
280 t->dn_dev_conf_dir[0].child = t->dn_dev_dev;
281 t->dn_dev_conf_dir[0].de = NULL;
282 t->dn_dev_proto_dir[0].child = t->dn_dev_conf_dir;
283 t->dn_dev_proto_dir[0].de = NULL;
284 t->dn_dev_root_dir[0].child = t->dn_dev_proto_dir;
285 t->dn_dev_root_dir[0].de = NULL;
286 t->dn_dev_vars[0].extra1 = (void *)dev;
287
288 t->sysctl_header = register_sysctl_table(t->dn_dev_root_dir, 0);
289 if (t->sysctl_header == NULL)
290 kfree(t);
291 else
292 parms->sysctl = t;
293}
294
295static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
296{
297 if (parms->sysctl) {
298 struct dn_dev_sysctl_table *t = parms->sysctl;
299 parms->sysctl = NULL;
300 unregister_sysctl_table(t->sysctl_header);
301 kfree(t);
302 }
303}
304
305static int dn_forwarding_proc(ctl_table *table, int write,
306 struct file *filep,
307 void __user *buffer,
308 size_t *lenp, loff_t *ppos)
309{
310#ifdef CONFIG_DECNET_ROUTER
311 struct net_device *dev = table->extra1;
312 struct dn_dev *dn_db;
313 int err;
314 int tmp, old;
315
316 if (table->extra1 == NULL)
317 return -EINVAL;
318
319 dn_db = dev->dn_ptr;
320 old = dn_db->parms.forwarding;
321
322 err = proc_dointvec(table, write, filep, buffer, lenp, ppos);
323
324 if ((err >= 0) && write) {
325 if (dn_db->parms.forwarding < 0)
326 dn_db->parms.forwarding = 0;
327 if (dn_db->parms.forwarding > 2)
328 dn_db->parms.forwarding = 2;
329 /*
330 * What an ugly hack this is... its works, just. It
331 * would be nice if sysctl/proc were just that little
332 * bit more flexible so I don't have to write a special
333 * routine, or suffer hacks like this - SJW
334 */
335 tmp = dn_db->parms.forwarding;
336 dn_db->parms.forwarding = old;
337 if (dn_db->parms.down)
338 dn_db->parms.down(dev);
339 dn_db->parms.forwarding = tmp;
340 if (dn_db->parms.up)
341 dn_db->parms.up(dev);
342 }
343
344 return err;
345#else
346 return -EINVAL;
347#endif
348}
349
350static int dn_forwarding_sysctl(ctl_table *table, int __user *name, int nlen,
351 void __user *oldval, size_t __user *oldlenp,
352 void __user *newval, size_t newlen,
353 void **context)
354{
355#ifdef CONFIG_DECNET_ROUTER
356 struct net_device *dev = table->extra1;
357 struct dn_dev *dn_db;
358 int value;
359
360 if (table->extra1 == NULL)
361 return -EINVAL;
362
363 dn_db = dev->dn_ptr;
364
365 if (newval && newlen) {
366 if (newlen != sizeof(int))
367 return -EINVAL;
368
369 if (get_user(value, (int __user *)newval))
370 return -EFAULT;
371 if (value < 0)
372 return -EINVAL;
373 if (value > 2)
374 return -EINVAL;
375
376 if (dn_db->parms.down)
377 dn_db->parms.down(dev);
378 dn_db->parms.forwarding = value;
379 if (dn_db->parms.up)
380 dn_db->parms.up(dev);
381 }
382
383 return 0;
384#else
385 return -EINVAL;
386#endif
387}
388
389#else /* CONFIG_SYSCTL */
390static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
391{
392}
393static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
394{
395}
396
397#endif /* CONFIG_SYSCTL */
398
399static inline __u16 mtu2blksize(struct net_device *dev)
400{
401 u32 blksize = dev->mtu;
402 if (blksize > 0xffff)
403 blksize = 0xffff;
404
405 if (dev->type == ARPHRD_ETHER ||
406 dev->type == ARPHRD_PPP ||
407 dev->type == ARPHRD_IPGRE ||
408 dev->type == ARPHRD_LOOPBACK)
409 blksize -= 2;
410
411 return (__u16)blksize;
412}
413
414static struct dn_ifaddr *dn_dev_alloc_ifa(void)
415{
416 struct dn_ifaddr *ifa;
417
0da974f4 418 ifa = kzalloc(sizeof(*ifa), GFP_KERNEL);
1da177e4
LT		 419
420 return ifa;
421}
422
423static __inline__ void dn_dev_free_ifa(struct dn_ifaddr *ifa)
424{
425 kfree(ifa);
426}
427
428static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr **ifap, int destroy)
429{
430 struct dn_ifaddr *ifa1 = *ifap;
431 unsigned char mac_addr[6];
432 struct net_device *dev = dn_db->dev;
433
434 ASSERT_RTNL();
435
436 *ifap = ifa1->ifa_next;
437
438 if (dn_db->dev->type == ARPHRD_ETHER) {
c4ea94ab 439 if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) {
1da177e4
LT		 440 dn_dn2eth(mac_addr, ifa1->ifa_local);
441 dev_mc_delete(dev, mac_addr, ETH_ALEN, 0);
442 }
443 }
444
445 rtmsg_ifa(RTM_DELADDR, ifa1);
e041c683 446 blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1);
1da177e4
LT		 447 if (destroy) {
448 dn_dev_free_ifa(ifa1);
449
450 if (dn_db->ifa_list == NULL)
451 dn_dev_delete(dn_db->dev);
452 }
453}
454
455static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa)
456{
457 struct net_device *dev = dn_db->dev;
458 struct dn_ifaddr *ifa1;
459 unsigned char mac_addr[6];
460
461 ASSERT_RTNL();
462
463 /* Check for duplicates */
464 for(ifa1 = dn_db->ifa_list; ifa1; ifa1 = ifa1->ifa_next) {
465 if (ifa1->ifa_local == ifa->ifa_local)
466 return -EEXIST;
467 }
468
469 if (dev->type == ARPHRD_ETHER) {
c4ea94ab 470 if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) {
1da177e4
LT		 471 dn_dn2eth(mac_addr, ifa->ifa_local);
472 dev_mc_add(dev, mac_addr, ETH_ALEN, 0);
473 dev_mc_upload(dev);
474 }
475 }
476
477 ifa->ifa_next = dn_db->ifa_list;
478 dn_db->ifa_list = ifa;
479
480 rtmsg_ifa(RTM_NEWADDR, ifa);
e041c683 481 blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa);
1da177e4
LT		 482
483 return 0;
484}
485
486static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa)
487{
488 struct dn_dev *dn_db = dev->dn_ptr;
489 int rv;
490
491 if (dn_db == NULL) {
492 int err;
493 dn_db = dn_dev_create(dev, &err);
494 if (dn_db == NULL)
495 return err;
496 }
497
498 ifa->ifa_dev = dn_db;
499
500 if (dev->flags & IFF_LOOPBACK)
501 ifa->ifa_scope = RT_SCOPE_HOST;
502
503 rv = dn_dev_insert_ifa(dn_db, ifa);
504 if (rv)
505 dn_dev_free_ifa(ifa);
506 return rv;
507}
508
509
510int dn_dev_ioctl(unsigned int cmd, void __user *arg)
511{
512 char buffer[DN_IFREQ_SIZE];
513 struct ifreq *ifr = (struct ifreq *)buffer;
514 struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr;
515 struct dn_dev *dn_db;
516 struct net_device *dev;
517 struct dn_ifaddr *ifa = NULL, **ifap = NULL;
518 int ret = 0;
519
520 if (copy_from_user(ifr, arg, DN_IFREQ_SIZE))
521 return -EFAULT;
522 ifr->ifr_name[IFNAMSIZ-1] = 0;
523
524#ifdef CONFIG_KMOD
525 dev_load(ifr->ifr_name);
526#endif
527
528 switch(cmd) {
529 case SIOCGIFADDR:
530 break;
531 case SIOCSIFADDR:
532 if (!capable(CAP_NET_ADMIN))
533 return -EACCES;
534 if (sdn->sdn_family != AF_DECnet)
535 return -EINVAL;
536 break;
537 default:
538 return -EINVAL;
539 }
540
541 rtnl_lock();
542
543 if ((dev = __dev_get_by_name(ifr->ifr_name)) == NULL) {
544 ret = -ENODEV;
545 goto done;
546 }
547
548 if ((dn_db = dev->dn_ptr) != NULL) {
549 for (ifap = &dn_db->ifa_list; (ifa=*ifap) != NULL; ifap = &ifa->ifa_next)
550 if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0)
551 break;
552 }
553
554 if (ifa == NULL && cmd != SIOCSIFADDR) {
555 ret = -EADDRNOTAVAIL;
556 goto done;
557 }
558
559 switch(cmd) {
560 case SIOCGIFADDR:
c4ea94ab 561 *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local;
1da177e4
LT		 562 goto rarok;
563
564 case SIOCSIFADDR:
565 if (!ifa) {
566 if ((ifa = dn_dev_alloc_ifa()) == NULL) {
567 ret = -ENOBUFS;
568 break;
569 }
570 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
571 } else {
572 if (ifa->ifa_local == dn_saddr2dn(sdn))
573 break;
574 dn_dev_del_ifa(dn_db, ifap, 0);
575 }
576
577 ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn);
578
579 ret = dn_dev_set_ifa(dev, ifa);
580 }
581done:
582 rtnl_unlock();
583
584 return ret;
585rarok:
586 if (copy_to_user(arg, ifr, DN_IFREQ_SIZE))
587 ret = -EFAULT;
588 goto done;
589}
590
591struct net_device *dn_dev_get_default(void)
592{
593 struct net_device *dev;
594 read_lock(&dndev_lock);
595 dev = decnet_default_device;
596 if (dev) {
597 if (dev->dn_ptr)
598 dev_hold(dev);
599 else
600 dev = NULL;
601 }
602 read_unlock(&dndev_lock);
603 return dev;
604}
605
606int dn_dev_set_default(struct net_device *dev, int force)
607{
608 struct net_device *old = NULL;
609 int rv = -EBUSY;
610 if (!dev->dn_ptr)
611 return -ENODEV;
612 write_lock(&dndev_lock);
613 if (force || decnet_default_device == NULL) {
614 old = decnet_default_device;
615 decnet_default_device = dev;
616 rv = 0;
617 }
618 write_unlock(&dndev_lock);
619 if (old)
6a57b2ee 620 dev_put(old);
1da177e4
LT		 621 return rv;
622}
623
624static void dn_dev_check_default(struct net_device *dev)
625{
626 write_lock(&dndev_lock);
627 if (dev == decnet_default_device) {
628 decnet_default_device = NULL;
629 } else {
630 dev = NULL;
631 }
632 write_unlock(&dndev_lock);
633 if (dev)
634 dev_put(dev);
635}
636
637static struct dn_dev *dn_dev_by_index(int ifindex)
638{
639 struct net_device *dev;
640 struct dn_dev *dn_dev = NULL;
641 dev = dev_get_by_index(ifindex);
642 if (dev) {
643 dn_dev = dev->dn_ptr;
644 dev_put(dev);
645 }
646
647 return dn_dev;
648}
649
650static int dn_dev_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
651{
652 struct rtattr **rta = arg;
653 struct dn_dev *dn_db;
654 struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
655 struct dn_ifaddr *ifa, **ifap;
656
657 if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL)
658 return -EADDRNOTAVAIL;
659
660 for(ifap = &dn_db->ifa_list; (ifa=*ifap) != NULL; ifap = &ifa->ifa_next) {
661 void *tmp = rta[IFA_LOCAL-1];
662 if ((tmp && memcmp(RTA_DATA(tmp), &ifa->ifa_local, 2)) ||
663 (rta[IFA_LABEL-1] && rtattr_strcmp(rta[IFA_LABEL-1], ifa->ifa_label)))
664 continue;
665
666 dn_dev_del_ifa(dn_db, ifap, 1);
667 return 0;
668 }
669
670 return -EADDRNOTAVAIL;
671}
672
673static int dn_dev_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
674{
675 struct rtattr **rta = arg;
676 struct net_device *dev;
677 struct dn_dev *dn_db;
678 struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
679 struct dn_ifaddr *ifa;
680 int rv;
681
682 if (rta[IFA_LOCAL-1] == NULL)
683 return -EINVAL;
684
685 if ((dev = __dev_get_by_index(ifm->ifa_index)) == NULL)
686 return -ENODEV;
687
688 if ((dn_db = dev->dn_ptr) == NULL) {
689 int err;
690 dn_db = dn_dev_create(dev, &err);
691 if (!dn_db)
692 return err;
693 }
694
695 if ((ifa = dn_dev_alloc_ifa()) == NULL)
696 return -ENOBUFS;
697
698 if (!rta[IFA_ADDRESS - 1])
699 rta[IFA_ADDRESS - 1] = rta[IFA_LOCAL - 1];
700 memcpy(&ifa->ifa_local, RTA_DATA(rta[IFA_LOCAL-1]), 2);
701 memcpy(&ifa->ifa_address, RTA_DATA(rta[IFA_ADDRESS-1]), 2);
702 ifa->ifa_flags = ifm->ifa_flags;
703 ifa->ifa_scope = ifm->ifa_scope;
704 ifa->ifa_dev = dn_db;
705 if (rta[IFA_LABEL-1])
706 rtattr_strlcpy(ifa->ifa_label, rta[IFA_LABEL-1], IFNAMSIZ);
707 else
708 memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
709
710 rv = dn_dev_insert_ifa(dn_db, ifa);
711 if (rv)
712 dn_dev_free_ifa(ifa);
713 return rv;
714}
715
716static int dn_dev_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa,
b6544c0b 717 u32 pid, u32 seq, int event, unsigned int flags)
1da177e4
LT		 718{
719 struct ifaddrmsg *ifm;
720 struct nlmsghdr *nlh;
721 unsigned char *b = skb->tail;
722
b6544c0b 723 nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags);
1da177e4
LT		 724 ifm = NLMSG_DATA(nlh);
725
726 ifm->ifa_family = AF_DECnet;
727 ifm->ifa_prefixlen = 16;
728 ifm->ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT;
729 ifm->ifa_scope = ifa->ifa_scope;
730 ifm->ifa_index = ifa->ifa_dev->dev->ifindex;
731 if (ifa->ifa_address)
732 RTA_PUT(skb, IFA_ADDRESS, 2, &ifa->ifa_address);
733 if (ifa->ifa_local)
734 RTA_PUT(skb, IFA_LOCAL, 2, &ifa->ifa_local);
735 if (ifa->ifa_label[0])
736 RTA_PUT(skb, IFA_LABEL, IFNAMSIZ, &ifa->ifa_label);
737 nlh->nlmsg_len = skb->tail - b;
738 return skb->len;
739
740nlmsg_failure:
741rtattr_failure:
742 skb_trim(skb, b - skb->data);
743 return -1;
744}
745
746static void rtmsg_ifa(int event, struct dn_ifaddr *ifa)
747{
748 struct sk_buff *skb;
dc738dd8
TG		 749 int payload = sizeof(struct ifaddrmsg) + 128;
750 int err = -ENOBUFS;
1da177e4 751
dc738dd8
TG		 752 skb = alloc_skb(nlmsg_total_size(payload), GFP_KERNEL);
753 if (skb == NULL)
754 goto errout;
755
756 err = dn_dev_fill_ifaddr(skb, ifa, 0, 0, event, 0);
757 if (err < 0) {
1da177e4 758 kfree_skb(skb);
dc738dd8 759 goto errout;
1da177e4 760 }
dc738dd8
TG		 761
762 err = rtnl_notify(skb, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL);
763errout:
764 if (err < 0)
765 rtnl_set_sk_err(RTNLGRP_DECnet_IFADDR, err);
1da177e4
LT		 766}
767
768static int dn_dev_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
769{
770 int idx, dn_idx;
771 int s_idx, s_dn_idx;
772 struct net_device *dev;
773 struct dn_dev *dn_db;
774 struct dn_ifaddr *ifa;
775
776 s_idx = cb->args[0];
777 s_dn_idx = dn_idx = cb->args[1];
778 read_lock(&dev_base_lock);
779 for(dev = dev_base, idx = 0; dev; dev = dev->next, idx++) {
780 if (idx < s_idx)
781 continue;
782 if (idx > s_idx)
783 s_dn_idx = 0;
784 if ((dn_db = dev->dn_ptr) == NULL)
785 continue;
786
787 for(ifa = dn_db->ifa_list, dn_idx = 0; ifa; ifa = ifa->ifa_next, dn_idx++) {
788 if (dn_idx < s_dn_idx)
789 continue;
790
791 if (dn_dev_fill_ifaddr(skb, ifa,
792 NETLINK_CB(cb->skb).pid,
793 cb->nlh->nlmsg_seq,
b6544c0b
JHS		 794 RTM_NEWADDR,
795 NLM_F_MULTI) <= 0)
1da177e4
LT		 796 goto done;
797 }
798 }
799done:
800 read_unlock(&dev_base_lock);
801 cb->args[0] = idx;
802 cb->args[1] = dn_idx;
803
804 return skb->len;
805}
806
c4ea94ab 807static int dn_dev_get_first(struct net_device *dev, __le16 *addr)
1da177e4
LT		 808{
809 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
810 struct dn_ifaddr *ifa;
811 int rv = -ENODEV;
812 if (dn_db == NULL)
813 goto out;
814 ifa = dn_db->ifa_list;
815 if (ifa != NULL) {
816 *addr = ifa->ifa_local;
817 rv = 0;
818 }
819out:
820 return rv;
821}
822
823/*
824 * Find a default address to bind to.
825 *
826 * This is one of those areas where the initial VMS concepts don't really
827 * map onto the Linux concepts, and since we introduced multiple addresses
828 * per interface we have to cope with slightly odd ways of finding out what
829 * "our address" really is. Mostly it's not a problem; for this we just guess
830 * a sensible default. Eventually the routing code will take care of all the
831 * nasties for us I hope.
832 */
c4ea94ab 833int dn_dev_bind_default(__le16 *addr)
1da177e4
LT		 834{
835 struct net_device *dev;
836 int rv;
837 dev = dn_dev_get_default();
838last_chance:
839 if (dev) {
840 read_lock(&dev_base_lock);
841 rv = dn_dev_get_first(dev, addr);
842 read_unlock(&dev_base_lock);
843 dev_put(dev);
844 if (rv == 0 || dev == &loopback_dev)
845 return rv;
846 }
847 dev = &loopback_dev;
848 dev_hold(dev);
849 goto last_chance;
850}
851
852static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa)
853{
854 struct endnode_hello_message *msg;
855 struct sk_buff *skb = NULL;
c4ea94ab 856 __le16 *pktlen;
1da177e4
LT		 857 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
858
859 if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL)
860 return;
861
862 skb->dev = dev;
863
864 msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg));
865
866 msg->msgflg = 0x0D;
867 memcpy(msg->tiver, dn_eco_version, 3);
868 dn_dn2eth(msg->id, ifa->ifa_local);
869 msg->iinfo = DN_RT_INFO_ENDN;
870 msg->blksize = dn_htons(mtu2blksize(dev));
871 msg->area = 0x00;
872 memset(msg->seed, 0, 8);
873 memcpy(msg->neighbor, dn_hiord, ETH_ALEN);
874
875 if (dn_db->router) {
876 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
877 dn_dn2eth(msg->neighbor, dn->addr);
878 }
879
880 msg->timer = dn_htons((unsigned short)dn_db->parms.t3);
881 msg->mpd = 0x00;
882 msg->datalen = 0x02;
883 memset(msg->data, 0xAA, 2);
884
c4ea94ab 885 pktlen = (__le16 *)skb_push(skb,2);
1da177e4
LT		 886 *pktlen = dn_htons(skb->len - 2);
887
888 skb->nh.raw = skb->data;
889
890 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id);
891}
892
893
894#define DRDELAY (5 * HZ)
895
896static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa)
897{
898 /* First check time since device went up */
899 if ((jiffies - dn_db->uptime) < DRDELAY)
900 return 0;
901
902 /* If there is no router, then yes... */
903 if (!dn_db->router)
904 return 1;
905
906 /* otherwise only if we have a higher priority or.. */
907 if (dn->priority < dn_db->parms.priority)
908 return 1;
909
910 /* if we have equal priority and a higher node number */
911 if (dn->priority != dn_db->parms.priority)
912 return 0;
913
914 if (dn_ntohs(dn->addr) < dn_ntohs(ifa->ifa_local))
915 return 1;
916
917 return 0;
918}
919
920static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa)
921{
922 int n;
923 struct dn_dev *dn_db = dev->dn_ptr;
924 struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
925 struct sk_buff *skb;
926 size_t size;
927 unsigned char *ptr;
928 unsigned char *i1, *i2;
c4ea94ab 929 __le16 *pktlen;
1da177e4
LT		 930 char *src;
931
932 if (mtu2blksize(dev) < (26 + 7))
933 return;
934
935 n = mtu2blksize(dev) - 26;
936 n /= 7;
937
938 if (n > 32)
939 n = 32;
940
941 size = 2 + 26 + 7 * n;
942
943 if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL)
944 return;
945
946 skb->dev = dev;
947 ptr = skb_put(skb, size);
948
949 *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH;
950 *ptr++ = 2; /* ECO */
951 *ptr++ = 0;
952 *ptr++ = 0;
953 dn_dn2eth(ptr, ifa->ifa_local);
954 src = ptr;
955 ptr += ETH_ALEN;
956 *ptr++ = dn_db->parms.forwarding == 1 ?
957 DN_RT_INFO_L1RT : DN_RT_INFO_L2RT;
c4ea94ab 958 *((__le16 *)ptr) = dn_htons(mtu2blksize(dev));
1da177e4
LT		 959 ptr += 2;
960 *ptr++ = dn_db->parms.priority; /* Priority */
961 *ptr++ = 0; /* Area: Reserved */
c4ea94ab 962 *((__le16 *)ptr) = dn_htons((unsigned short)dn_db->parms.t3);
1da177e4
LT		 963 ptr += 2;
964 *ptr++ = 0; /* MPD: Reserved */
965 i1 = ptr++;
966 memset(ptr, 0, 7); /* Name: Reserved */
967 ptr += 7;
968 i2 = ptr++;
969
970 n = dn_neigh_elist(dev, ptr, n);
971
972 *i2 = 7 * n;
973 *i1 = 8 + *i2;
974
975 skb_trim(skb, (27 + *i2));
976
c4ea94ab 977 pktlen = (__le16 *)skb_push(skb, 2);
1da177e4
LT		 978 *pktlen = dn_htons(skb->len - 2);
979
980 skb->nh.raw = skb->data;
981
982 if (dn_am_i_a_router(dn, dn_db, ifa)) {
983 struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC);
984 if (skb2) {
985 dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src);
986 }
987 }
988
989 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
990}
991
992static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa)
993{
994 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
995
996 if (dn_db->parms.forwarding == 0)
997 dn_send_endnode_hello(dev, ifa);
998 else
999 dn_send_router_hello(dev, ifa);
1000}
1001
1002static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa)
1003{
1004 int tdlen = 16;
1005 int size = dev->hard_header_len + 2 + 4 + tdlen;
1006 struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC);
1007 int i;
1008 unsigned char *ptr;
1009 char src[ETH_ALEN];
1010
1011 if (skb == NULL)
1012 return ;
1013
1014 skb->dev = dev;
1015 skb_push(skb, dev->hard_header_len);
1016 ptr = skb_put(skb, 2 + 4 + tdlen);
1017
1018 *ptr++ = DN_RT_PKT_HELO;
c4ea94ab 1019 *((__le16 *)ptr) = ifa->ifa_local;
1da177e4
LT		 1020 ptr += 2;
1021 *ptr++ = tdlen;
1022
1023 for(i = 0; i < tdlen; i++)
1024 *ptr++ = 0252;
1025
1026 dn_dn2eth(src, ifa->ifa_local);
1027 dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
1028}
1029
1030static int dn_eth_up(struct net_device *dev)
1031{
1032 struct dn_dev *dn_db = dev->dn_ptr;
1033
1034 if (dn_db->parms.forwarding == 0)
1035 dev_mc_add(dev, dn_rt_all_end_mcast, ETH_ALEN, 0);
1036 else
1037 dev_mc_add(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0);
1038
1039 dev_mc_upload(dev);
1040
1041 dn_db->use_long = 1;
1042
1043 return 0;
1044}
1045
1046static void dn_eth_down(struct net_device *dev)
1047{
1048 struct dn_dev *dn_db = dev->dn_ptr;
1049
1050 if (dn_db->parms.forwarding == 0)
1051 dev_mc_delete(dev, dn_rt_all_end_mcast, ETH_ALEN, 0);
1052 else
1053 dev_mc_delete(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0);
1054}
1055
1056static void dn_dev_set_timer(struct net_device *dev);
1057
1058static void dn_dev_timer_func(unsigned long arg)
1059{
1060 struct net_device *dev = (struct net_device *)arg;
1061 struct dn_dev *dn_db = dev->dn_ptr;
1062 struct dn_ifaddr *ifa;
1063
1064 if (dn_db->t3 <= dn_db->parms.t2) {
1065 if (dn_db->parms.timer3) {
1066 for(ifa = dn_db->ifa_list; ifa; ifa = ifa->ifa_next) {
1067 if (!(ifa->ifa_flags & IFA_F_SECONDARY))
1068 dn_db->parms.timer3(dev, ifa);
1069 }
1070 }
1071 dn_db->t3 = dn_db->parms.t3;
1072 } else {
1073 dn_db->t3 -= dn_db->parms.t2;
1074 }
1075
1076 dn_dev_set_timer(dev);
1077}
1078
1079static void dn_dev_set_timer(struct net_device *dev)
1080{
1081 struct dn_dev *dn_db = dev->dn_ptr;
1082
1083 if (dn_db->parms.t2 > dn_db->parms.t3)
1084 dn_db->parms.t2 = dn_db->parms.t3;
1085
1086 dn_db->timer.data = (unsigned long)dev;
1087 dn_db->timer.function = dn_dev_timer_func;
1088 dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ);
1089
1090 add_timer(&dn_db->timer);
1091}
1092
1093struct dn_dev *dn_dev_create(struct net_device *dev, int *err)
1094{
1095 int i;
1096 struct dn_dev_parms *p = dn_dev_list;
1097 struct dn_dev *dn_db;
1098
1099 for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) {
1100 if (p->type == dev->type)
1101 break;
1102 }
1103
1104 *err = -ENODEV;
1105 if (i == DN_DEV_LIST_SIZE)
1106 return NULL;
1107
1108 *err = -ENOBUFS;
0da974f4 1109 if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL)
1da177e4
LT		 1110 return NULL;
1111
1da177e4
LT		 1112 memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms));
1113 smp_wmb();
1114 dev->dn_ptr = dn_db;
1115 dn_db->dev = dev;
1116 init_timer(&dn_db->timer);
1117
1118 dn_db->uptime = jiffies;
1119 if (dn_db->parms.up) {
1120 if (dn_db->parms.up(dev) < 0) {
1121 dev->dn_ptr = NULL;
1122 kfree(dn_db);
1123 return NULL;
1124 }
1125 }
1126
1127 dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table);
1128
1129 dn_dev_sysctl_register(dev, &dn_db->parms);
1130
1131 dn_dev_set_timer(dev);
1132
1133 *err = 0;
1134 return dn_db;
1135}
1136
1137
1138/*
1139 * This processes a device up event. We only start up
1140 * the loopback device & ethernet devices with correct
1141 * MAC addreses automatically. Others must be started
1142 * specifically.
1143 *
1144 * FIXME: How should we configure the loopback address ? If we could dispense
1145 * with using decnet_address here and for autobind, it will be one less thing
1146 * for users to worry about setting up.
1147 */
1148
1149void dn_dev_up(struct net_device *dev)
1150{
1151 struct dn_ifaddr *ifa;
c4ea94ab 1152 __le16 addr = decnet_address;
1da177e4
LT		 1153 int maybe_default = 0;
1154 struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
1155
1156 if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK))
1157 return;
1158
1159 /*
1160 * Need to ensure that loopback device has a dn_db attached to it
1161 * to allow creation of neighbours against it, even though it might
1162 * not have a local address of its own. Might as well do the same for
1163 * all autoconfigured interfaces.
1164 */
1165 if (dn_db == NULL) {
1166 int err;
1167 dn_db = dn_dev_create(dev, &err);
1168 if (dn_db == NULL)
1169 return;
1170 }
1171
1172 if (dev->type == ARPHRD_ETHER) {
1173 if (memcmp(dev->dev_addr, dn_hiord, 4) != 0)
1174 return;
c4ea94ab 1175 addr = dn_eth2dn(dev->dev_addr);
1da177e4
LT		 1176 maybe_default = 1;
1177 }
1178
1179 if (addr == 0)
1180 return;
1181
1182 if ((ifa = dn_dev_alloc_ifa()) == NULL)
1183 return;
1184
1185 ifa->ifa_local = ifa->ifa_address = addr;
1186 ifa->ifa_flags = 0;
1187 ifa->ifa_scope = RT_SCOPE_UNIVERSE;
1188 strcpy(ifa->ifa_label, dev->name);
1189
1190 dn_dev_set_ifa(dev, ifa);
1191
1192 /*
1193 * Automagically set the default device to the first automatically
1194 * configured ethernet card in the system.
1195 */
1196 if (maybe_default) {
1197 dev_hold(dev);
1198 if (dn_dev_set_default(dev, 0))
1199 dev_put(dev);
1200 }
1201}
1202
1203static void dn_dev_delete(struct net_device *dev)
1204{
1205 struct dn_dev *dn_db = dev->dn_ptr;
1206
1207 if (dn_db == NULL)
1208 return;
1209
1210 del_timer_sync(&dn_db->timer);
1211 dn_dev_sysctl_unregister(&dn_db->parms);
1212 dn_dev_check_default(dev);
1213 neigh_ifdown(&dn_neigh_table, dev);
1214
1215 if (dn_db->parms.down)
1216 dn_db->parms.down(dev);
1217
1218 dev->dn_ptr = NULL;
1219
1220 neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
1221 neigh_ifdown(&dn_neigh_table, dev);
1222
1223 if (dn_db->router)
1224 neigh_release(dn_db->router);
1225 if (dn_db->peer)
1226 neigh_release(dn_db->peer);
1227
1228 kfree(dn_db);
1229}
1230
1231void dn_dev_down(struct net_device *dev)
1232{
1233 struct dn_dev *dn_db = dev->dn_ptr;
1234 struct dn_ifaddr *ifa;
1235
1236 if (dn_db == NULL)
1237 return;
1238
1239 while((ifa = dn_db->ifa_list) != NULL) {
1240 dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0);
1241 dn_dev_free_ifa(ifa);
1242 }
1243
1244 dn_dev_delete(dev);
1245}
1246
1247void dn_dev_init_pkt(struct sk_buff *skb)
1248{
1249 return;
1250}
1251
1252void dn_dev_veri_pkt(struct sk_buff *skb)
1253{
1254 return;
1255}
1256
1257void dn_dev_hello(struct sk_buff *skb)
1258{
1259 return;
1260}
1261
1262void dn_dev_devices_off(void)
1263{
1264 struct net_device *dev;
1265
1266 rtnl_lock();
1267 for(dev = dev_base; dev; dev = dev->next)
1268 dn_dev_down(dev);
1269 rtnl_unlock();
1270
1271}
1272
1273void dn_dev_devices_on(void)
1274{
1275 struct net_device *dev;
1276
1277 rtnl_lock();
1278 for(dev = dev_base; dev; dev = dev->next) {
1279 if (dev->flags & IFF_UP)
1280 dn_dev_up(dev);
1281 }
1282 rtnl_unlock();
1283}
1284
1285int register_dnaddr_notifier(struct notifier_block *nb)
1286{
e041c683 1287 return blocking_notifier_chain_register(&dnaddr_chain, nb);
1da177e4
LT		 1288}
1289
1290int unregister_dnaddr_notifier(struct notifier_block *nb)
1291{
e041c683 1292 return blocking_notifier_chain_unregister(&dnaddr_chain, nb);
1da177e4
LT		 1293}
1294
1295#ifdef CONFIG_PROC_FS
1296static inline struct net_device *dn_dev_get_next(struct seq_file *seq, struct net_device *dev)
1297{
1298 do {
1299 dev = dev->next;
1300 } while(dev && !dev->dn_ptr);
1301
1302 return dev;
1303}
1304
1305static struct net_device *dn_dev_get_idx(struct seq_file *seq, loff_t pos)
1306{
1307 struct net_device *dev;
1308
1309 dev = dev_base;
1310 if (dev && !dev->dn_ptr)
1311 dev = dn_dev_get_next(seq, dev);
1312 if (pos) {
1313 while(dev && (dev = dn_dev_get_next(seq, dev)))
1314 --pos;
1315 }
1316 return dev;
1317}
1318
1319static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos)
1320{
1321 if (*pos) {
1322 struct net_device *dev;
1323 read_lock(&dev_base_lock);
1324 dev = dn_dev_get_idx(seq, *pos - 1);
1325 if (dev == NULL)
1326 read_unlock(&dev_base_lock);
1327 return dev;
1328 }
1329 return SEQ_START_TOKEN;
1330}
1331
1332static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1333{
1334 struct net_device *dev = v;
1335 loff_t one = 1;
1336
1337 if (v == SEQ_START_TOKEN) {
1338 dev = dn_dev_seq_start(seq, &one);
1339 } else {
1340 dev = dn_dev_get_next(seq, dev);
1341 if (dev == NULL)
1342 read_unlock(&dev_base_lock);
1343 }
1344 ++*pos;
1345 return dev;
1346}
1347
1348static void dn_dev_seq_stop(struct seq_file *seq, void *v)
1349{
1350 if (v && v != SEQ_START_TOKEN)
1351 read_unlock(&dev_base_lock);
1352}
1353
1354static char *dn_type2asc(char type)
1355{
1356 switch(type) {
1357 case DN_DEV_BCAST:
1358 return "B";
1359 case DN_DEV_UCAST:
1360 return "U";
1361 case DN_DEV_MPOINT:
1362 return "M";
1363 }
1364
1365 return "?";
1366}
1367
1368static int dn_dev_seq_show(struct seq_file *seq, void *v)
1369{
1370 if (v == SEQ_START_TOKEN)
1371 seq_puts(seq, "Name Flags T1 Timer1 T3 Timer3 BlkSize Pri State DevType Router Peer\n");
1372 else {
1373 struct net_device *dev = v;
1374 char peer_buf[DN_ASCBUF_LEN];
1375 char router_buf[DN_ASCBUF_LEN];
1376 struct dn_dev *dn_db = dev->dn_ptr;
1377
1378 seq_printf(seq, "%-8s %1s %04u %04u %04lu %04lu"
1379 " %04hu %03d %02x %-10s %-7s %-7s\n",
1380 dev->name ? dev->name : "???",
1381 dn_type2asc(dn_db->parms.mode),
1382 0, 0,
1383 dn_db->t3, dn_db->parms.t3,
1384 mtu2blksize(dev),
1385 dn_db->parms.priority,
1386 dn_db->parms.state, dn_db->parms.name,
c4ea94ab
SW		 1387 dn_db->router ? dn_addr2asc(dn_ntohs(*(__le16 *)dn_db->router->primary_key), router_buf) : "",
1388 dn_db->peer ? dn_addr2asc(dn_ntohs(*(__le16 *)dn_db->peer->primary_key), peer_buf) : "");
1da177e4
LT		 1389 }
1390 return 0;
1391}
1392
1393static struct seq_operations dn_dev_seq_ops = {
1394 .start = dn_dev_seq_start,
1395 .next = dn_dev_seq_next,
1396 .stop = dn_dev_seq_stop,
1397 .show = dn_dev_seq_show,
1398};
1399
1400static int dn_dev_seq_open(struct inode *inode, struct file *file)
1401{
1402 return seq_open(file, &dn_dev_seq_ops);
1403}
1404
1405static struct file_operations dn_dev_seq_fops = {
1406 .owner = THIS_MODULE,
1407 .open = dn_dev_seq_open,
1408 .read = seq_read,
1409 .llseek = seq_lseek,
1410 .release = seq_release,
1411};
1412
1413#endif /* CONFIG_PROC_FS */
1414
db46edc6 1415static struct rtnetlink_link dnet_rtnetlink_table[RTM_NR_MSGTYPES] =
1da177e4 1416{
db46edc6
TG		 1417 [RTM_NEWADDR - RTM_BASE] = { .doit = dn_dev_rtm_newaddr, },
1418 [RTM_DELADDR - RTM_BASE] = { .doit = dn_dev_rtm_deladdr, },
1419 [RTM_GETADDR - RTM_BASE] = { .dumpit = dn_dev_dump_ifaddr, },
1da177e4 1420#ifdef CONFIG_DECNET_ROUTER
db46edc6
TG		 1421 [RTM_NEWROUTE - RTM_BASE] = { .doit = dn_fib_rtm_newroute, },
1422 [RTM_DELROUTE - RTM_BASE] = { .doit = dn_fib_rtm_delroute, },
1423 [RTM_GETROUTE - RTM_BASE] = { .doit = dn_cache_getroute,
1424 .dumpit = dn_fib_dump, },
db46edc6 1425 [RTM_GETRULE - RTM_BASE] = { .dumpit = dn_fib_dump_rules, },
1da177e4 1426#else
db46edc6 1427 [RTM_GETROUTE - RTM_BASE] = { .doit = dn_cache_getroute,
25ae3f59 1428 .dumpit = dn_cache_dump, },
1da177e4
LT		 1429#endif
1430
1431};
1432
1433static int __initdata addr[2];
1434module_param_array(addr, int, NULL, 0444);
1435MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node");
1436
1437void __init dn_dev_init(void)
1438{
1439 if (addr[0] > 63 || addr[0] < 0) {
1440 printk(KERN_ERR "DECnet: Area must be between 0 and 63");
1441 return;
1442 }
1443
1444 if (addr[1] > 1023 || addr[1] < 0) {
1445 printk(KERN_ERR "DECnet: Node must be between 0 and 1023");
1446 return;
1447 }
1448
1449 decnet_address = dn_htons((addr[0] << 10) | addr[1]);
1450
1451 dn_dev_devices_on();
1452
1453 rtnetlink_links[PF_DECnet] = dnet_rtnetlink_table;
1454
1455 proc_net_fops_create("decnet_dev", S_IRUGO, &dn_dev_seq_fops);
1456
1457#ifdef CONFIG_SYSCTL
1458 {
1459 int i;
1460 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1461 dn_dev_sysctl_register(NULL, &dn_dev_list[i]);
1462 }
1463#endif /* CONFIG_SYSCTL */
1464}
1465
1466void __exit dn_dev_cleanup(void)
1467{
1468 rtnetlink_links[PF_DECnet] = NULL;
1469
1470#ifdef CONFIG_SYSCTL
1471 {
1472 int i;
1473 for(i = 0; i < DN_DEV_LIST_SIZE; i++)
1474 dn_dev_sysctl_unregister(&dn_dev_list[i]);
1475 }
1476#endif /* CONFIG_SYSCTL */
1477
1478 proc_net_remove("decnet_dev");
1479
1480 dn_dev_devices_off();
1481}
Linux 6.x block layer and io_uring tree(s)