blob: 4041054e528252442b672830f710604d9a91b4c8 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* net/atm/proc.c - ATM /proc interface
2 *
3 * Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA
4 *
5 * seq_file api usage by romieu@fr.zoreil.com
6 *
7 * Evaluating the efficiency of the whole thing if left as an exercise to
8 * the reader.
9 */
10
11#include <linux/config.h>
12#include <linux/module.h> /* for EXPORT_SYMBOL */
13#include <linux/string.h>
14#include <linux/types.h>
15#include <linux/mm.h>
16#include <linux/fs.h>
17#include <linux/stat.h>
18#include <linux/proc_fs.h>
19#include <linux/seq_file.h>
20#include <linux/errno.h>
21#include <linux/atm.h>
22#include <linux/atmdev.h>
23#include <linux/netdevice.h>
24#include <linux/atmclip.h>
25#include <linux/init.h> /* for __init */
26#include <net/atmclip.h>
27#include <asm/uaccess.h>
28#include <asm/atomic.h>
29#include <asm/param.h> /* for HZ */
30#include "resources.h"
31#include "common.h" /* atm_proc_init prototype */
32#include "signaling.h" /* to get sigd - ugly too */
33
34static ssize_t proc_dev_atm_read(struct file *file,char __user *buf,size_t count,
35 loff_t *pos);
36
37static struct file_operations proc_atm_dev_ops = {
38 .owner = THIS_MODULE,
39 .read = proc_dev_atm_read,
40};
41
42static void add_stats(struct seq_file *seq, const char *aal,
43 const struct k_atm_aal_stats *stats)
44{
45 seq_printf(seq, "%s ( %d %d %d %d %d )", aal,
46 atomic_read(&stats->tx),atomic_read(&stats->tx_err),
47 atomic_read(&stats->rx),atomic_read(&stats->rx_err),
48 atomic_read(&stats->rx_drop));
49}
50
51static void atm_dev_info(struct seq_file *seq, const struct atm_dev *dev)
52{
53 int i;
54
55 seq_printf(seq, "%3d %-8s", dev->number, dev->type);
56 for (i = 0; i < ESI_LEN; i++)
57 seq_printf(seq, "%02x", dev->esi[i]);
58 seq_puts(seq, " ");
59 add_stats(seq, "0", &dev->stats.aal0);
60 seq_puts(seq, " ");
61 add_stats(seq, "5", &dev->stats.aal5);
62 seq_printf(seq, "\t[%d]", atomic_read(&dev->refcnt));
63 seq_putc(seq, '\n');
64}
65
66struct vcc_state {
67 int bucket;
68 struct sock *sk;
69 int family;
70};
71
72static inline int compare_family(struct sock *sk, int family)
73{
74 return !family || (sk->sk_family == family);
75}
76
77static int __vcc_walk(struct sock **sock, int family, int *bucket, loff_t l)
78{
79 struct sock *sk = *sock;
80
81 if (sk == (void *)1) {
82 for (*bucket = 0; *bucket < VCC_HTABLE_SIZE; ++*bucket) {
83 struct hlist_head *head = &vcc_hash[*bucket];
84
85 sk = hlist_empty(head) ? NULL : __sk_head(head);
86 if (sk)
87 break;
88 }
89 l--;
90 }
91try_again:
92 for (; sk; sk = sk_next(sk)) {
93 l -= compare_family(sk, family);
94 if (l < 0)
95 goto out;
96 }
97 if (!sk && ++*bucket < VCC_HTABLE_SIZE) {
98 sk = sk_head(&vcc_hash[*bucket]);
99 goto try_again;
100 }
101 sk = (void *)1;
102out:
103 *sock = sk;
104 return (l < 0);
105}
106
107static inline void *vcc_walk(struct vcc_state *state, loff_t l)
108{
109 return __vcc_walk(&state->sk, state->family, &state->bucket, l) ?
110 state : NULL;
111}
112
113static int __vcc_seq_open(struct inode *inode, struct file *file,
114 int family, struct seq_operations *ops)
115{
116 struct vcc_state *state;
117 struct seq_file *seq;
118 int rc = -ENOMEM;
119
120 state = kmalloc(sizeof(*state), GFP_KERNEL);
121 if (!state)
122 goto out;
123
124 rc = seq_open(file, ops);
125 if (rc)
126 goto out_kfree;
127
128 state->family = family;
129
130 seq = file->private_data;
131 seq->private = state;
132out:
133 return rc;
134out_kfree:
135 kfree(state);
136 goto out;
137}
138
139static int vcc_seq_release(struct inode *inode, struct file *file)
140{
141 return seq_release_private(inode, file);
142}
143
144static void *vcc_seq_start(struct seq_file *seq, loff_t *pos)
145{
146 struct vcc_state *state = seq->private;
147 loff_t left = *pos;
148
149 read_lock(&vcc_sklist_lock);
150 state->sk = (void *)1;
151 return left ? vcc_walk(state, left) : (void *)1;
152}
153
154static void vcc_seq_stop(struct seq_file *seq, void *v)
155{
156 read_unlock(&vcc_sklist_lock);
157}
158
159static void *vcc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
160{
161 struct vcc_state *state = seq->private;
162
163 v = vcc_walk(state, 1);
164 *pos += !!PTR_ERR(v);
165 return v;
166}
167
168static void pvc_info(struct seq_file *seq, struct atm_vcc *vcc)
169{
170 static const char *class_name[] = { "off","UBR","CBR","VBR","ABR" };
171 static const char *aal_name[] = {
172 "---", "1", "2", "3/4", /* 0- 3 */
173 "???", "5", "???", "???", /* 4- 7 */
174 "???", "???", "???", "???", /* 8-11 */
175 "???", "0", "???", "???"}; /* 12-15 */
176
177 seq_printf(seq, "%3d %3d %5d %-3s %7d %-5s %7d %-6s",
178 vcc->dev->number,vcc->vpi,vcc->vci,
179 vcc->qos.aal >= sizeof(aal_name)/sizeof(aal_name[0]) ? "err" :
180 aal_name[vcc->qos.aal],vcc->qos.rxtp.min_pcr,
181 class_name[vcc->qos.rxtp.traffic_class],vcc->qos.txtp.min_pcr,
182 class_name[vcc->qos.txtp.traffic_class]);
183 if (test_bit(ATM_VF_IS_CLIP, &vcc->flags)) {
184 struct clip_vcc *clip_vcc = CLIP_VCC(vcc);
185 struct net_device *dev;
186
187 dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : NULL;
188 seq_printf(seq, "CLIP, Itf:%s, Encap:",
189 dev ? dev->name : "none?");
190 seq_printf(seq, "%s", clip_vcc->encap ? "LLC/SNAP" : "None");
191 }
192 seq_putc(seq, '\n');
193}
194
195static const char *vcc_state(struct atm_vcc *vcc)
196{
197 static const char *map[] = { ATM_VS2TXT_MAP };
198
199 return map[ATM_VF2VS(vcc->flags)];
200}
201
202static void vcc_info(struct seq_file *seq, struct atm_vcc *vcc)
203{
204 struct sock *sk = sk_atm(vcc);
205
206 seq_printf(seq, "%p ", vcc);
207 if (!vcc->dev)
208 seq_printf(seq, "Unassigned ");
209 else
210 seq_printf(seq, "%3d %3d %5d ", vcc->dev->number, vcc->vpi,
211 vcc->vci);
212 switch (sk->sk_family) {
213 case AF_ATMPVC:
214 seq_printf(seq, "PVC");
215 break;
216 case AF_ATMSVC:
217 seq_printf(seq, "SVC");
218 break;
219 default:
220 seq_printf(seq, "%3d", sk->sk_family);
221 }
222 seq_printf(seq, " %04lx %5d %7d/%7d %7d/%7d [%d]\n", vcc->flags, sk->sk_err,
223 atomic_read(&sk->sk_wmem_alloc), sk->sk_sndbuf,
224 atomic_read(&sk->sk_rmem_alloc), sk->sk_rcvbuf,
225 atomic_read(&sk->sk_refcnt));
226}
227
228static void svc_info(struct seq_file *seq, struct atm_vcc *vcc)
229{
230 if (!vcc->dev)
231 seq_printf(seq, sizeof(void *) == 4 ?
232 "N/A@%p%10s" : "N/A@%p%2s", vcc, "");
233 else
234 seq_printf(seq, "%3d %3d %5d ",
235 vcc->dev->number, vcc->vpi, vcc->vci);
236 seq_printf(seq, "%-10s ", vcc_state(vcc));
237 seq_printf(seq, "%s%s", vcc->remote.sas_addr.pub,
238 *vcc->remote.sas_addr.pub && *vcc->remote.sas_addr.prv ? "+" : "");
239 if (*vcc->remote.sas_addr.prv) {
240 int i;
241
242 for (i = 0; i < ATM_ESA_LEN; i++)
243 seq_printf(seq, "%02x", vcc->remote.sas_addr.prv[i]);
244 }
245 seq_putc(seq, '\n');
246}
247
248static int atm_dev_seq_show(struct seq_file *seq, void *v)
249{
250 static char atm_dev_banner[] =
251 "Itf Type ESI/\"MAC\"addr "
252 "AAL(TX,err,RX,err,drop) ... [refcnt]\n";
253
254 if (v == (void *)1)
255 seq_puts(seq, atm_dev_banner);
256 else {
257 struct atm_dev *dev = list_entry(v, struct atm_dev, dev_list);
258
259 atm_dev_info(seq, dev);
260 }
261 return 0;
262}
263
264static struct seq_operations atm_dev_seq_ops = {
265 .start = atm_dev_seq_start,
266 .next = atm_dev_seq_next,
267 .stop = atm_dev_seq_stop,
268 .show = atm_dev_seq_show,
269};
270
271static int atm_dev_seq_open(struct inode *inode, struct file *file)
272{
273 return seq_open(file, &atm_dev_seq_ops);
274}
275
276static struct file_operations devices_seq_fops = {
277 .open = atm_dev_seq_open,
278 .read = seq_read,
279 .llseek = seq_lseek,
280 .release = seq_release,
281};
282
283static int pvc_seq_show(struct seq_file *seq, void *v)
284{
285 static char atm_pvc_banner[] =
286 "Itf VPI VCI AAL RX(PCR,Class) TX(PCR,Class)\n";
287
288 if (v == (void *)1)
289 seq_puts(seq, atm_pvc_banner);
290 else {
291 struct vcc_state *state = seq->private;
292 struct atm_vcc *vcc = atm_sk(state->sk);
293
294 pvc_info(seq, vcc);
295 }
296 return 0;
297}
298
299static struct seq_operations pvc_seq_ops = {
300 .start = vcc_seq_start,
301 .next = vcc_seq_next,
302 .stop = vcc_seq_stop,
303 .show = pvc_seq_show,
304};
305
306static int pvc_seq_open(struct inode *inode, struct file *file)
307{
308 return __vcc_seq_open(inode, file, PF_ATMPVC, &pvc_seq_ops);
309}
310
311static struct file_operations pvc_seq_fops = {
312 .open = pvc_seq_open,
313 .read = seq_read,
314 .llseek = seq_lseek,
315 .release = vcc_seq_release,
316};
317
318static int vcc_seq_show(struct seq_file *seq, void *v)
319{
320 if (v == (void *)1) {
321 seq_printf(seq, sizeof(void *) == 4 ? "%-8s%s" : "%-16s%s",
322 "Address ", "Itf VPI VCI Fam Flags Reply "
323 "Send buffer Recv buffer [refcnt]\n");
324 } else {
325 struct vcc_state *state = seq->private;
326 struct atm_vcc *vcc = atm_sk(state->sk);
327
328 vcc_info(seq, vcc);
329 }
330 return 0;
331}
332
333static struct seq_operations vcc_seq_ops = {
334 .start = vcc_seq_start,
335 .next = vcc_seq_next,
336 .stop = vcc_seq_stop,
337 .show = vcc_seq_show,
338};
339
340static int vcc_seq_open(struct inode *inode, struct file *file)
341{
342 return __vcc_seq_open(inode, file, 0, &vcc_seq_ops);
343}
344
345static struct file_operations vcc_seq_fops = {
346 .open = vcc_seq_open,
347 .read = seq_read,
348 .llseek = seq_lseek,
349 .release = vcc_seq_release,
350};
351
352static int svc_seq_show(struct seq_file *seq, void *v)
353{
354 static char atm_svc_banner[] =
355 "Itf VPI VCI State Remote\n";
356
357 if (v == (void *)1)
358 seq_puts(seq, atm_svc_banner);
359 else {
360 struct vcc_state *state = seq->private;
361 struct atm_vcc *vcc = atm_sk(state->sk);
362
363 svc_info(seq, vcc);
364 }
365 return 0;
366}
367
368static struct seq_operations svc_seq_ops = {
369 .start = vcc_seq_start,
370 .next = vcc_seq_next,
371 .stop = vcc_seq_stop,
372 .show = svc_seq_show,
373};
374
375static int svc_seq_open(struct inode *inode, struct file *file)
376{
377 return __vcc_seq_open(inode, file, PF_ATMSVC, &svc_seq_ops);
378}
379
380static struct file_operations svc_seq_fops = {
381 .open = svc_seq_open,
382 .read = seq_read,
383 .llseek = seq_lseek,
384 .release = vcc_seq_release,
385};
386
387static ssize_t proc_dev_atm_read(struct file *file, char __user *buf,
388 size_t count, loff_t *pos)
389{
390 struct atm_dev *dev;
391 unsigned long page;
392 int length;
393
394 if (count == 0) return 0;
395 page = get_zeroed_page(GFP_KERNEL);
396 if (!page) return -ENOMEM;
397 dev = PDE(file->f_dentry->d_inode)->data;
398 if (!dev->ops->proc_read)
399 length = -EINVAL;
400 else {
401 length = dev->ops->proc_read(dev,pos,(char *) page);
402 if (length > count) length = -EINVAL;
403 }
404 if (length >= 0) {
405 if (copy_to_user(buf,(char *) page,length)) length = -EFAULT;
406 (*pos)++;
407 }
408 free_page(page);
409 return length;
410}
411
412
413struct proc_dir_entry *atm_proc_root;
414EXPORT_SYMBOL(atm_proc_root);
415
416
417int atm_proc_dev_register(struct atm_dev *dev)
418{
419 int digits,num;
420 int error;
421
422 /* No proc info */
423 if (!dev->ops->proc_read)
424 return 0;
425
426 error = -ENOMEM;
427 digits = 0;
428 for (num = dev->number; num; num /= 10) digits++;
429 if (!digits) digits++;
430
431 dev->proc_name = kmalloc(strlen(dev->type) + digits + 2, GFP_KERNEL);
432 if (!dev->proc_name)
433 goto err_out;
434 sprintf(dev->proc_name,"%s:%d",dev->type, dev->number);
435
436 dev->proc_entry = create_proc_entry(dev->proc_name, 0, atm_proc_root);
437 if (!dev->proc_entry)
438 goto err_free_name;
439 dev->proc_entry->data = dev;
440 dev->proc_entry->proc_fops = &proc_atm_dev_ops;
441 dev->proc_entry->owner = THIS_MODULE;
442 return 0;
443err_free_name:
444 kfree(dev->proc_name);
445err_out:
446 return error;
447}
448
449
450void atm_proc_dev_deregister(struct atm_dev *dev)
451{
452 if (!dev->ops->proc_read)
453 return;
454
455 remove_proc_entry(dev->proc_name, atm_proc_root);
456 kfree(dev->proc_name);
457}
458
459static struct atm_proc_entry {
460 char *name;
461 struct file_operations *proc_fops;
462 struct proc_dir_entry *dirent;
463} atm_proc_ents[] = {
464 { .name = "devices", .proc_fops = &devices_seq_fops },
465 { .name = "pvc", .proc_fops = &pvc_seq_fops },
466 { .name = "svc", .proc_fops = &svc_seq_fops },
467 { .name = "vc", .proc_fops = &vcc_seq_fops },
468 { .name = NULL, .proc_fops = NULL }
469};
470
471static void atm_proc_dirs_remove(void)
472{
473 static struct atm_proc_entry *e;
474
475 for (e = atm_proc_ents; e->name; e++) {
476 if (e->dirent)
477 remove_proc_entry(e->name, atm_proc_root);
478 }
479 remove_proc_entry("net/atm", NULL);
480}
481
482int __init atm_proc_init(void)
483{
484 static struct atm_proc_entry *e;
485 int ret;
486
487 atm_proc_root = proc_mkdir("net/atm",NULL);
488 if (!atm_proc_root)
489 goto err_out;
490 for (e = atm_proc_ents; e->name; e++) {
491 struct proc_dir_entry *dirent;
492
493 dirent = create_proc_entry(e->name, S_IRUGO, atm_proc_root);
494 if (!dirent)
495 goto err_out_remove;
496 dirent->proc_fops = e->proc_fops;
497 dirent->owner = THIS_MODULE;
498 e->dirent = dirent;
499 }
500 ret = 0;
501out:
502 return ret;
503
504err_out_remove:
505 atm_proc_dirs_remove();
506err_out:
507 ret = -ENOMEM;
508 goto out;
509}
510
511void __exit atm_proc_exit(void)
512{
513 atm_proc_dirs_remove();
514}