SUNRPC: Make krb5 report unsupported encryption types
[linux-2.6/verdex.git] / net / atm / resources.c
blobc8c459fcb0386a0e597f8b2d811a08b3055a0ef8
1 /* net/atm/resources.c - Statically allocated resources */
3 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
5 /* Fixes
6 * Arnaldo Carvalho de Melo <acme@conectiva.com.br>
7 * 2002/01 - don't free the whole struct sock on sk->destruct time,
8 * use the default destruct function initialized by sock_init_data */
11 #include <linux/config.h>
12 #include <linux/ctype.h>
13 #include <linux/string.h>
14 #include <linux/atmdev.h>
15 #include <linux/sonet.h>
16 #include <linux/kernel.h> /* for barrier */
17 #include <linux/module.h>
18 #include <linux/bitops.h>
19 #include <linux/delay.h>
20 #include <net/sock.h> /* for struct sock */
22 #include "common.h"
23 #include "resources.h"
24 #include "addr.h"
27 LIST_HEAD(atm_devs);
28 DECLARE_MUTEX(atm_dev_mutex);
30 static struct atm_dev *__alloc_atm_dev(const char *type)
32 struct atm_dev *dev;
34 dev = kmalloc(sizeof(*dev), GFP_KERNEL);
35 if (!dev)
36 return NULL;
37 memset(dev, 0, sizeof(*dev));
38 dev->type = type;
39 dev->signal = ATM_PHY_SIG_UNKNOWN;
40 dev->link_rate = ATM_OC3_PCR;
41 spin_lock_init(&dev->lock);
42 INIT_LIST_HEAD(&dev->local);
43 INIT_LIST_HEAD(&dev->lecs);
45 return dev;
48 static struct atm_dev *__atm_dev_lookup(int number)
50 struct atm_dev *dev;
51 struct list_head *p;
53 list_for_each(p, &atm_devs) {
54 dev = list_entry(p, struct atm_dev, dev_list);
55 if (dev->number == number) {
56 atm_dev_hold(dev);
57 return dev;
60 return NULL;
63 struct atm_dev *atm_dev_lookup(int number)
65 struct atm_dev *dev;
67 down(&atm_dev_mutex);
68 dev = __atm_dev_lookup(number);
69 up(&atm_dev_mutex);
70 return dev;
74 struct atm_dev *atm_dev_register(const char *type, const struct atmdev_ops *ops,
75 int number, unsigned long *flags)
77 struct atm_dev *dev, *inuse;
79 dev = __alloc_atm_dev(type);
80 if (!dev) {
81 printk(KERN_ERR "atm_dev_register: no space for dev %s\n",
82 type);
83 return NULL;
85 down(&atm_dev_mutex);
86 if (number != -1) {
87 if ((inuse = __atm_dev_lookup(number))) {
88 atm_dev_put(inuse);
89 up(&atm_dev_mutex);
90 kfree(dev);
91 return NULL;
93 dev->number = number;
94 } else {
95 dev->number = 0;
96 while ((inuse = __atm_dev_lookup(dev->number))) {
97 atm_dev_put(inuse);
98 dev->number++;
102 dev->ops = ops;
103 if (flags)
104 dev->flags = *flags;
105 else
106 memset(&dev->flags, 0, sizeof(dev->flags));
107 memset(&dev->stats, 0, sizeof(dev->stats));
108 atomic_set(&dev->refcnt, 1);
110 if (atm_proc_dev_register(dev) < 0) {
111 printk(KERN_ERR "atm_dev_register: "
112 "atm_proc_dev_register failed for dev %s\n",
113 type);
114 up(&atm_dev_mutex);
115 kfree(dev);
116 return NULL;
118 list_add_tail(&dev->dev_list, &atm_devs);
119 up(&atm_dev_mutex);
121 return dev;
125 void atm_dev_deregister(struct atm_dev *dev)
127 BUG_ON(test_bit(ATM_DF_REMOVED, &dev->flags));
128 set_bit(ATM_DF_REMOVED, &dev->flags);
131 * if we remove current device from atm_devs list, new device
132 * with same number can appear, such we need deregister proc,
133 * release async all vccs and remove them from vccs list too
135 down(&atm_dev_mutex);
136 list_del(&dev->dev_list);
137 up(&atm_dev_mutex);
139 atm_dev_release_vccs(dev);
140 atm_proc_dev_deregister(dev);
142 atm_dev_put(dev);
146 static void copy_aal_stats(struct k_atm_aal_stats *from,
147 struct atm_aal_stats *to)
149 #define __HANDLE_ITEM(i) to->i = atomic_read(&from->i)
150 __AAL_STAT_ITEMS
151 #undef __HANDLE_ITEM
155 static void subtract_aal_stats(struct k_atm_aal_stats *from,
156 struct atm_aal_stats *to)
158 #define __HANDLE_ITEM(i) atomic_sub(to->i, &from->i)
159 __AAL_STAT_ITEMS
160 #undef __HANDLE_ITEM
164 static int fetch_stats(struct atm_dev *dev, struct atm_dev_stats __user *arg, int zero)
166 struct atm_dev_stats tmp;
167 int error = 0;
169 copy_aal_stats(&dev->stats.aal0, &tmp.aal0);
170 copy_aal_stats(&dev->stats.aal34, &tmp.aal34);
171 copy_aal_stats(&dev->stats.aal5, &tmp.aal5);
172 if (arg)
173 error = copy_to_user(arg, &tmp, sizeof(tmp));
174 if (zero && !error) {
175 subtract_aal_stats(&dev->stats.aal0, &tmp.aal0);
176 subtract_aal_stats(&dev->stats.aal34, &tmp.aal34);
177 subtract_aal_stats(&dev->stats.aal5, &tmp.aal5);
179 return error ? -EFAULT : 0;
183 int atm_dev_ioctl(unsigned int cmd, void __user *arg)
185 void __user *buf;
186 int error, len, number, size = 0;
187 struct atm_dev *dev;
188 struct list_head *p;
189 int *tmp_buf, *tmp_p;
190 struct atm_iobuf __user *iobuf = arg;
191 struct atmif_sioc __user *sioc = arg;
192 switch (cmd) {
193 case ATM_GETNAMES:
194 if (get_user(buf, &iobuf->buffer))
195 return -EFAULT;
196 if (get_user(len, &iobuf->length))
197 return -EFAULT;
198 down(&atm_dev_mutex);
199 list_for_each(p, &atm_devs)
200 size += sizeof(int);
201 if (size > len) {
202 up(&atm_dev_mutex);
203 return -E2BIG;
205 tmp_buf = kmalloc(size, GFP_ATOMIC);
206 if (!tmp_buf) {
207 up(&atm_dev_mutex);
208 return -ENOMEM;
210 tmp_p = tmp_buf;
211 list_for_each(p, &atm_devs) {
212 dev = list_entry(p, struct atm_dev, dev_list);
213 *tmp_p++ = dev->number;
215 up(&atm_dev_mutex);
216 error = ((copy_to_user(buf, tmp_buf, size)) ||
217 put_user(size, &iobuf->length))
218 ? -EFAULT : 0;
219 kfree(tmp_buf);
220 return error;
221 default:
222 break;
225 if (get_user(buf, &sioc->arg))
226 return -EFAULT;
227 if (get_user(len, &sioc->length))
228 return -EFAULT;
229 if (get_user(number, &sioc->number))
230 return -EFAULT;
232 if (!(dev = try_then_request_module(atm_dev_lookup(number),
233 "atm-device-%d", number)))
234 return -ENODEV;
236 switch (cmd) {
237 case ATM_GETTYPE:
238 size = strlen(dev->type) + 1;
239 if (copy_to_user(buf, dev->type, size)) {
240 error = -EFAULT;
241 goto done;
243 break;
244 case ATM_GETESI:
245 size = ESI_LEN;
246 if (copy_to_user(buf, dev->esi, size)) {
247 error = -EFAULT;
248 goto done;
250 break;
251 case ATM_SETESI:
253 int i;
255 for (i = 0; i < ESI_LEN; i++)
256 if (dev->esi[i]) {
257 error = -EEXIST;
258 goto done;
261 /* fall through */
262 case ATM_SETESIF:
264 unsigned char esi[ESI_LEN];
266 if (!capable(CAP_NET_ADMIN)) {
267 error = -EPERM;
268 goto done;
270 if (copy_from_user(esi, buf, ESI_LEN)) {
271 error = -EFAULT;
272 goto done;
274 memcpy(dev->esi, esi, ESI_LEN);
275 error = ESI_LEN;
276 goto done;
278 case ATM_GETSTATZ:
279 if (!capable(CAP_NET_ADMIN)) {
280 error = -EPERM;
281 goto done;
283 /* fall through */
284 case ATM_GETSTAT:
285 size = sizeof(struct atm_dev_stats);
286 error = fetch_stats(dev, buf, cmd == ATM_GETSTATZ);
287 if (error)
288 goto done;
289 break;
290 case ATM_GETCIRANGE:
291 size = sizeof(struct atm_cirange);
292 if (copy_to_user(buf, &dev->ci_range, size)) {
293 error = -EFAULT;
294 goto done;
296 break;
297 case ATM_GETLINKRATE:
298 size = sizeof(int);
299 if (copy_to_user(buf, &dev->link_rate, size)) {
300 error = -EFAULT;
301 goto done;
303 break;
304 case ATM_RSTADDR:
305 if (!capable(CAP_NET_ADMIN)) {
306 error = -EPERM;
307 goto done;
309 atm_reset_addr(dev, ATM_ADDR_LOCAL);
310 break;
311 case ATM_ADDADDR:
312 case ATM_DELADDR:
313 case ATM_ADDLECSADDR:
314 case ATM_DELLECSADDR:
315 if (!capable(CAP_NET_ADMIN)) {
316 error = -EPERM;
317 goto done;
320 struct sockaddr_atmsvc addr;
322 if (copy_from_user(&addr, buf, sizeof(addr))) {
323 error = -EFAULT;
324 goto done;
326 if (cmd == ATM_ADDADDR || cmd == ATM_ADDLECSADDR)
327 error = atm_add_addr(dev, &addr,
328 (cmd == ATM_ADDADDR ?
329 ATM_ADDR_LOCAL : ATM_ADDR_LECS));
330 else
331 error = atm_del_addr(dev, &addr,
332 (cmd == ATM_DELADDR ?
333 ATM_ADDR_LOCAL : ATM_ADDR_LECS));
334 goto done;
336 case ATM_GETADDR:
337 case ATM_GETLECSADDR:
338 error = atm_get_addr(dev, buf, len,
339 (cmd == ATM_GETADDR ?
340 ATM_ADDR_LOCAL : ATM_ADDR_LECS));
341 if (error < 0)
342 goto done;
343 size = error;
344 /* may return 0, but later on size == 0 means "don't
345 write the length" */
346 error = put_user(size, &sioc->length)
347 ? -EFAULT : 0;
348 goto done;
349 case ATM_SETLOOP:
350 if (__ATM_LM_XTRMT((int) (unsigned long) buf) &&
351 __ATM_LM_XTLOC((int) (unsigned long) buf) >
352 __ATM_LM_XTRMT((int) (unsigned long) buf)) {
353 error = -EINVAL;
354 goto done;
356 /* fall through */
357 case ATM_SETCIRANGE:
358 case SONET_GETSTATZ:
359 case SONET_SETDIAG:
360 case SONET_CLRDIAG:
361 case SONET_SETFRAMING:
362 if (!capable(CAP_NET_ADMIN)) {
363 error = -EPERM;
364 goto done;
366 /* fall through */
367 default:
368 if (!dev->ops->ioctl) {
369 error = -EINVAL;
370 goto done;
372 size = dev->ops->ioctl(dev, cmd, buf);
373 if (size < 0) {
374 error = (size == -ENOIOCTLCMD ? -EINVAL : size);
375 goto done;
379 if (size)
380 error = put_user(size, &sioc->length)
381 ? -EFAULT : 0;
382 else
383 error = 0;
384 done:
385 atm_dev_put(dev);
386 return error;
389 static __inline__ void *dev_get_idx(loff_t left)
391 struct list_head *p;
393 list_for_each(p, &atm_devs) {
394 if (!--left)
395 break;
397 return (p != &atm_devs) ? p : NULL;
400 void *atm_dev_seq_start(struct seq_file *seq, loff_t *pos)
402 down(&atm_dev_mutex);
403 return *pos ? dev_get_idx(*pos) : (void *) 1;
406 void atm_dev_seq_stop(struct seq_file *seq, void *v)
408 up(&atm_dev_mutex);
411 void *atm_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
413 ++*pos;
414 v = (v == (void *)1) ? atm_devs.next : ((struct list_head *)v)->next;
415 return (v == &atm_devs) ? NULL : v;
419 EXPORT_SYMBOL(atm_dev_register);
420 EXPORT_SYMBOL(atm_dev_deregister);
421 EXPORT_SYMBOL(atm_dev_lookup);