Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* 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 | ||
1da177e4 LT |
11 | #include <linux/module.h> /* for EXPORT_SYMBOL */ |
12 | #include <linux/string.h> | |
13 | #include <linux/types.h> | |
14 | #include <linux/mm.h> | |
15 | #include <linux/fs.h> | |
16 | #include <linux/stat.h> | |
17 | #include <linux/proc_fs.h> | |
18 | #include <linux/seq_file.h> | |
19 | #include <linux/errno.h> | |
20 | #include <linux/atm.h> | |
21 | #include <linux/atmdev.h> | |
22 | #include <linux/netdevice.h> | |
23 | #include <linux/atmclip.h> | |
24 | #include <linux/init.h> /* for __init */ | |
25 | #include <net/atmclip.h> | |
26 | #include <asm/uaccess.h> | |
27 | #include <asm/atomic.h> | |
28 | #include <asm/param.h> /* for HZ */ | |
29 | #include "resources.h" | |
30 | #include "common.h" /* atm_proc_init prototype */ | |
31 | #include "signaling.h" /* to get sigd - ugly too */ | |
32 | ||
33 | static ssize_t proc_dev_atm_read(struct file *file,char __user *buf,size_t count, | |
34 | loff_t *pos); | |
35 | ||
9a32144e | 36 | static const struct file_operations proc_atm_dev_ops = { |
1da177e4 LT |
37 | .owner = THIS_MODULE, |
38 | .read = proc_dev_atm_read, | |
39 | }; | |
40 | ||
41 | static void add_stats(struct seq_file *seq, const char *aal, | |
42 | const struct k_atm_aal_stats *stats) | |
43 | { | |
44 | seq_printf(seq, "%s ( %d %d %d %d %d )", aal, | |
45 | atomic_read(&stats->tx),atomic_read(&stats->tx_err), | |
46 | atomic_read(&stats->rx),atomic_read(&stats->rx_err), | |
47 | atomic_read(&stats->rx_drop)); | |
48 | } | |
49 | ||
50 | static void atm_dev_info(struct seq_file *seq, const struct atm_dev *dev) | |
51 | { | |
52 | int i; | |
53 | ||
54 | seq_printf(seq, "%3d %-8s", dev->number, dev->type); | |
55 | for (i = 0; i < ESI_LEN; i++) | |
56 | seq_printf(seq, "%02x", dev->esi[i]); | |
57 | seq_puts(seq, " "); | |
58 | add_stats(seq, "0", &dev->stats.aal0); | |
59 | seq_puts(seq, " "); | |
60 | add_stats(seq, "5", &dev->stats.aal5); | |
61 | seq_printf(seq, "\t[%d]", atomic_read(&dev->refcnt)); | |
62 | seq_putc(seq, '\n'); | |
63 | } | |
64 | ||
65 | struct vcc_state { | |
66 | int bucket; | |
67 | struct sock *sk; | |
68 | int family; | |
69 | }; | |
70 | ||
71 | static inline int compare_family(struct sock *sk, int family) | |
72 | { | |
73 | return !family || (sk->sk_family == family); | |
74 | } | |
75 | ||
76 | static int __vcc_walk(struct sock **sock, int family, int *bucket, loff_t l) | |
77 | { | |
78 | struct sock *sk = *sock; | |
79 | ||
80 | if (sk == (void *)1) { | |
81 | for (*bucket = 0; *bucket < VCC_HTABLE_SIZE; ++*bucket) { | |
82 | struct hlist_head *head = &vcc_hash[*bucket]; | |
83 | ||
84 | sk = hlist_empty(head) ? NULL : __sk_head(head); | |
85 | if (sk) | |
86 | break; | |
87 | } | |
88 | l--; | |
f7d57453 | 89 | } |
1da177e4 LT |
90 | try_again: |
91 | for (; sk; sk = sk_next(sk)) { | |
92 | l -= compare_family(sk, family); | |
93 | if (l < 0) | |
94 | goto out; | |
95 | } | |
96 | if (!sk && ++*bucket < VCC_HTABLE_SIZE) { | |
97 | sk = sk_head(&vcc_hash[*bucket]); | |
98 | goto try_again; | |
99 | } | |
100 | sk = (void *)1; | |
101 | out: | |
102 | *sock = sk; | |
103 | return (l < 0); | |
104 | } | |
105 | ||
106 | static inline void *vcc_walk(struct vcc_state *state, loff_t l) | |
107 | { | |
108 | return __vcc_walk(&state->sk, state->family, &state->bucket, l) ? | |
109 | state : NULL; | |
110 | } | |
111 | ||
112 | static int __vcc_seq_open(struct inode *inode, struct file *file, | |
113 | int family, struct seq_operations *ops) | |
114 | { | |
115 | struct vcc_state *state; | |
116 | struct seq_file *seq; | |
117 | int rc = -ENOMEM; | |
118 | ||
119 | state = kmalloc(sizeof(*state), GFP_KERNEL); | |
120 | if (!state) | |
121 | goto out; | |
122 | ||
123 | rc = seq_open(file, ops); | |
124 | if (rc) | |
125 | goto out_kfree; | |
126 | ||
127 | state->family = family; | |
128 | ||
129 | seq = file->private_data; | |
130 | seq->private = state; | |
131 | out: | |
132 | return rc; | |
133 | out_kfree: | |
134 | kfree(state); | |
135 | goto out; | |
136 | } | |
137 | ||
138 | static int vcc_seq_release(struct inode *inode, struct file *file) | |
139 | { | |
140 | return seq_release_private(inode, file); | |
141 | } | |
142 | ||
143 | static void *vcc_seq_start(struct seq_file *seq, loff_t *pos) | |
144 | { | |
145 | struct vcc_state *state = seq->private; | |
146 | loff_t left = *pos; | |
147 | ||
148 | read_lock(&vcc_sklist_lock); | |
149 | state->sk = (void *)1; | |
150 | return left ? vcc_walk(state, left) : (void *)1; | |
151 | } | |
152 | ||
153 | static void vcc_seq_stop(struct seq_file *seq, void *v) | |
154 | { | |
155 | read_unlock(&vcc_sklist_lock); | |
156 | } | |
157 | ||
158 | static void *vcc_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
159 | { | |
160 | struct vcc_state *state = seq->private; | |
161 | ||
162 | v = vcc_walk(state, 1); | |
163 | *pos += !!PTR_ERR(v); | |
164 | return v; | |
165 | } | |
166 | ||
167 | static void pvc_info(struct seq_file *seq, struct atm_vcc *vcc) | |
168 | { | |
169 | static const char *class_name[] = { "off","UBR","CBR","VBR","ABR" }; | |
170 | static const char *aal_name[] = { | |
171 | "---", "1", "2", "3/4", /* 0- 3 */ | |
172 | "???", "5", "???", "???", /* 4- 7 */ | |
173 | "???", "???", "???", "???", /* 8-11 */ | |
174 | "???", "0", "???", "???"}; /* 12-15 */ | |
175 | ||
176 | seq_printf(seq, "%3d %3d %5d %-3s %7d %-5s %7d %-6s", | |
177 | vcc->dev->number,vcc->vpi,vcc->vci, | |
178 | vcc->qos.aal >= sizeof(aal_name)/sizeof(aal_name[0]) ? "err" : | |
179 | aal_name[vcc->qos.aal],vcc->qos.rxtp.min_pcr, | |
180 | class_name[vcc->qos.rxtp.traffic_class],vcc->qos.txtp.min_pcr, | |
181 | class_name[vcc->qos.txtp.traffic_class]); | |
182 | if (test_bit(ATM_VF_IS_CLIP, &vcc->flags)) { | |
183 | struct clip_vcc *clip_vcc = CLIP_VCC(vcc); | |
184 | struct net_device *dev; | |
185 | ||
186 | dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : NULL; | |
187 | seq_printf(seq, "CLIP, Itf:%s, Encap:", | |
188 | dev ? dev->name : "none?"); | |
189 | seq_printf(seq, "%s", clip_vcc->encap ? "LLC/SNAP" : "None"); | |
190 | } | |
191 | seq_putc(seq, '\n'); | |
192 | } | |
193 | ||
194 | static const char *vcc_state(struct atm_vcc *vcc) | |
195 | { | |
196 | static const char *map[] = { ATM_VS2TXT_MAP }; | |
197 | ||
198 | return map[ATM_VF2VS(vcc->flags)]; | |
199 | } | |
200 | ||
201 | static void vcc_info(struct seq_file *seq, struct atm_vcc *vcc) | |
202 | { | |
203 | struct sock *sk = sk_atm(vcc); | |
204 | ||
205 | seq_printf(seq, "%p ", vcc); | |
206 | if (!vcc->dev) | |
207 | seq_printf(seq, "Unassigned "); | |
f7d57453 | 208 | else |
1da177e4 LT |
209 | seq_printf(seq, "%3d %3d %5d ", vcc->dev->number, vcc->vpi, |
210 | vcc->vci); | |
211 | switch (sk->sk_family) { | |
212 | case AF_ATMPVC: | |
213 | seq_printf(seq, "PVC"); | |
214 | break; | |
215 | case AF_ATMSVC: | |
216 | seq_printf(seq, "SVC"); | |
217 | break; | |
218 | default: | |
219 | seq_printf(seq, "%3d", sk->sk_family); | |
220 | } | |
221 | seq_printf(seq, " %04lx %5d %7d/%7d %7d/%7d [%d]\n", vcc->flags, sk->sk_err, | |
222 | atomic_read(&sk->sk_wmem_alloc), sk->sk_sndbuf, | |
223 | atomic_read(&sk->sk_rmem_alloc), sk->sk_rcvbuf, | |
224 | atomic_read(&sk->sk_refcnt)); | |
225 | } | |
226 | ||
227 | static void svc_info(struct seq_file *seq, struct atm_vcc *vcc) | |
228 | { | |
229 | if (!vcc->dev) | |
230 | seq_printf(seq, sizeof(void *) == 4 ? | |
231 | "N/A@%p%10s" : "N/A@%p%2s", vcc, ""); | |
232 | else | |
233 | seq_printf(seq, "%3d %3d %5d ", | |
234 | vcc->dev->number, vcc->vpi, vcc->vci); | |
235 | seq_printf(seq, "%-10s ", vcc_state(vcc)); | |
236 | seq_printf(seq, "%s%s", vcc->remote.sas_addr.pub, | |
237 | *vcc->remote.sas_addr.pub && *vcc->remote.sas_addr.prv ? "+" : ""); | |
238 | if (*vcc->remote.sas_addr.prv) { | |
239 | int i; | |
240 | ||
241 | for (i = 0; i < ATM_ESA_LEN; i++) | |
242 | seq_printf(seq, "%02x", vcc->remote.sas_addr.prv[i]); | |
243 | } | |
244 | seq_putc(seq, '\n'); | |
245 | } | |
246 | ||
247 | static int atm_dev_seq_show(struct seq_file *seq, void *v) | |
248 | { | |
249 | static char atm_dev_banner[] = | |
250 | "Itf Type ESI/\"MAC\"addr " | |
251 | "AAL(TX,err,RX,err,drop) ... [refcnt]\n"; | |
f7d57453 | 252 | |
1da177e4 LT |
253 | if (v == (void *)1) |
254 | seq_puts(seq, atm_dev_banner); | |
255 | else { | |
256 | struct atm_dev *dev = list_entry(v, struct atm_dev, dev_list); | |
257 | ||
258 | atm_dev_info(seq, dev); | |
259 | } | |
f7d57453 | 260 | return 0; |
1da177e4 | 261 | } |
f7d57453 | 262 | |
1da177e4 LT |
263 | static struct seq_operations atm_dev_seq_ops = { |
264 | .start = atm_dev_seq_start, | |
265 | .next = atm_dev_seq_next, | |
266 | .stop = atm_dev_seq_stop, | |
267 | .show = atm_dev_seq_show, | |
268 | }; | |
f7d57453 | 269 | |
1da177e4 LT |
270 | static int atm_dev_seq_open(struct inode *inode, struct file *file) |
271 | { | |
272 | return seq_open(file, &atm_dev_seq_ops); | |
273 | } | |
f7d57453 | 274 | |
9a32144e | 275 | static const struct file_operations devices_seq_fops = { |
1da177e4 LT |
276 | .open = atm_dev_seq_open, |
277 | .read = seq_read, | |
278 | .llseek = seq_lseek, | |
279 | .release = seq_release, | |
280 | }; | |
281 | ||
282 | static int pvc_seq_show(struct seq_file *seq, void *v) | |
283 | { | |
f7d57453 | 284 | static char atm_pvc_banner[] = |
1da177e4 LT |
285 | "Itf VPI VCI AAL RX(PCR,Class) TX(PCR,Class)\n"; |
286 | ||
287 | if (v == (void *)1) | |
288 | seq_puts(seq, atm_pvc_banner); | |
289 | else { | |
290 | struct vcc_state *state = seq->private; | |
291 | struct atm_vcc *vcc = atm_sk(state->sk); | |
292 | ||
293 | pvc_info(seq, vcc); | |
294 | } | |
295 | return 0; | |
296 | } | |
297 | ||
298 | static struct seq_operations pvc_seq_ops = { | |
299 | .start = vcc_seq_start, | |
300 | .next = vcc_seq_next, | |
301 | .stop = vcc_seq_stop, | |
302 | .show = pvc_seq_show, | |
303 | }; | |
304 | ||
305 | static int pvc_seq_open(struct inode *inode, struct file *file) | |
306 | { | |
307 | return __vcc_seq_open(inode, file, PF_ATMPVC, &pvc_seq_ops); | |
308 | } | |
309 | ||
9a32144e | 310 | static const struct file_operations pvc_seq_fops = { |
1da177e4 LT |
311 | .open = pvc_seq_open, |
312 | .read = seq_read, | |
313 | .llseek = seq_lseek, | |
314 | .release = vcc_seq_release, | |
315 | }; | |
316 | ||
317 | static int vcc_seq_show(struct seq_file *seq, void *v) | |
318 | { | |
f7d57453 YH |
319 | if (v == (void *)1) { |
320 | seq_printf(seq, sizeof(void *) == 4 ? "%-8s%s" : "%-16s%s", | |
321 | "Address ", "Itf VPI VCI Fam Flags Reply " | |
322 | "Send buffer Recv buffer [refcnt]\n"); | |
323 | } else { | |
324 | struct vcc_state *state = seq->private; | |
325 | struct atm_vcc *vcc = atm_sk(state->sk); | |
326 | ||
327 | vcc_info(seq, vcc); | |
328 | } | |
329 | return 0; | |
1da177e4 | 330 | } |
f7d57453 | 331 | |
1da177e4 | 332 | static struct seq_operations vcc_seq_ops = { |
f7d57453 YH |
333 | .start = vcc_seq_start, |
334 | .next = vcc_seq_next, | |
335 | .stop = vcc_seq_stop, | |
336 | .show = vcc_seq_show, | |
1da177e4 | 337 | }; |
f7d57453 | 338 | |
1da177e4 LT |
339 | static int vcc_seq_open(struct inode *inode, struct file *file) |
340 | { | |
f7d57453 | 341 | return __vcc_seq_open(inode, file, 0, &vcc_seq_ops); |
1da177e4 | 342 | } |
f7d57453 | 343 | |
9a32144e | 344 | static const struct file_operations vcc_seq_fops = { |
1da177e4 LT |
345 | .open = vcc_seq_open, |
346 | .read = seq_read, | |
347 | .llseek = seq_lseek, | |
348 | .release = vcc_seq_release, | |
349 | }; | |
350 | ||
351 | static int svc_seq_show(struct seq_file *seq, void *v) | |
352 | { | |
f7d57453 | 353 | static char atm_svc_banner[] = |
1da177e4 LT |
354 | "Itf VPI VCI State Remote\n"; |
355 | ||
356 | if (v == (void *)1) | |
357 | seq_puts(seq, atm_svc_banner); | |
358 | else { | |
359 | struct vcc_state *state = seq->private; | |
360 | struct atm_vcc *vcc = atm_sk(state->sk); | |
361 | ||
362 | svc_info(seq, vcc); | |
363 | } | |
364 | return 0; | |
365 | } | |
366 | ||
367 | static struct seq_operations svc_seq_ops = { | |
368 | .start = vcc_seq_start, | |
369 | .next = vcc_seq_next, | |
370 | .stop = vcc_seq_stop, | |
371 | .show = svc_seq_show, | |
372 | }; | |
373 | ||
374 | static int svc_seq_open(struct inode *inode, struct file *file) | |
375 | { | |
376 | return __vcc_seq_open(inode, file, PF_ATMSVC, &svc_seq_ops); | |
377 | } | |
378 | ||
9a32144e | 379 | static const struct file_operations svc_seq_fops = { |
1da177e4 LT |
380 | .open = svc_seq_open, |
381 | .read = seq_read, | |
382 | .llseek = seq_lseek, | |
383 | .release = vcc_seq_release, | |
384 | }; | |
385 | ||
386 | static ssize_t proc_dev_atm_read(struct file *file, char __user *buf, | |
387 | size_t count, loff_t *pos) | |
388 | { | |
389 | struct atm_dev *dev; | |
390 | unsigned long page; | |
391 | int length; | |
392 | ||
393 | if (count == 0) return 0; | |
394 | page = get_zeroed_page(GFP_KERNEL); | |
395 | if (!page) return -ENOMEM; | |
76a0f174 | 396 | dev = PDE(file->f_path.dentry->d_inode)->data; |
1da177e4 LT |
397 | if (!dev->ops->proc_read) |
398 | length = -EINVAL; | |
399 | else { | |
400 | length = dev->ops->proc_read(dev,pos,(char *) page); | |
401 | if (length > count) length = -EINVAL; | |
402 | } | |
403 | if (length >= 0) { | |
404 | if (copy_to_user(buf,(char *) page,length)) length = -EFAULT; | |
405 | (*pos)++; | |
406 | } | |
407 | free_page(page); | |
408 | return length; | |
409 | } | |
410 | ||
411 | ||
412 | struct proc_dir_entry *atm_proc_root; | |
413 | EXPORT_SYMBOL(atm_proc_root); | |
414 | ||
415 | ||
416 | int atm_proc_dev_register(struct atm_dev *dev) | |
417 | { | |
418 | int digits,num; | |
419 | int error; | |
420 | ||
421 | /* No proc info */ | |
422 | if (!dev->ops->proc_read) | |
423 | return 0; | |
424 | ||
425 | error = -ENOMEM; | |
426 | digits = 0; | |
427 | for (num = dev->number; num; num /= 10) digits++; | |
428 | if (!digits) digits++; | |
429 | ||
430 | dev->proc_name = kmalloc(strlen(dev->type) + digits + 2, GFP_KERNEL); | |
431 | if (!dev->proc_name) | |
432 | goto err_out; | |
433 | sprintf(dev->proc_name,"%s:%d",dev->type, dev->number); | |
434 | ||
435 | dev->proc_entry = create_proc_entry(dev->proc_name, 0, atm_proc_root); | |
436 | if (!dev->proc_entry) | |
437 | goto err_free_name; | |
438 | dev->proc_entry->data = dev; | |
439 | dev->proc_entry->proc_fops = &proc_atm_dev_ops; | |
440 | dev->proc_entry->owner = THIS_MODULE; | |
441 | return 0; | |
442 | err_free_name: | |
443 | kfree(dev->proc_name); | |
444 | err_out: | |
445 | return error; | |
446 | } | |
447 | ||
448 | ||
449 | void atm_proc_dev_deregister(struct atm_dev *dev) | |
450 | { | |
451 | if (!dev->ops->proc_read) | |
452 | return; | |
453 | ||
454 | remove_proc_entry(dev->proc_name, atm_proc_root); | |
455 | kfree(dev->proc_name); | |
456 | } | |
457 | ||
458 | static struct atm_proc_entry { | |
459 | char *name; | |
9a32144e | 460 | const struct file_operations *proc_fops; |
1da177e4 LT |
461 | struct proc_dir_entry *dirent; |
462 | } atm_proc_ents[] = { | |
463 | { .name = "devices", .proc_fops = &devices_seq_fops }, | |
464 | { .name = "pvc", .proc_fops = &pvc_seq_fops }, | |
465 | { .name = "svc", .proc_fops = &svc_seq_fops }, | |
466 | { .name = "vc", .proc_fops = &vcc_seq_fops }, | |
467 | { .name = NULL, .proc_fops = NULL } | |
468 | }; | |
469 | ||
470 | static void atm_proc_dirs_remove(void) | |
471 | { | |
472 | static struct atm_proc_entry *e; | |
473 | ||
474 | for (e = atm_proc_ents; e->name; e++) { | |
f7d57453 | 475 | if (e->dirent) |
1da177e4 LT |
476 | remove_proc_entry(e->name, atm_proc_root); |
477 | } | |
478 | remove_proc_entry("net/atm", NULL); | |
479 | } | |
480 | ||
481 | int __init atm_proc_init(void) | |
482 | { | |
483 | static struct atm_proc_entry *e; | |
484 | int ret; | |
485 | ||
486 | atm_proc_root = proc_mkdir("net/atm",NULL); | |
487 | if (!atm_proc_root) | |
488 | goto err_out; | |
489 | for (e = atm_proc_ents; e->name; e++) { | |
490 | struct proc_dir_entry *dirent; | |
491 | ||
492 | dirent = create_proc_entry(e->name, S_IRUGO, atm_proc_root); | |
493 | if (!dirent) | |
494 | goto err_out_remove; | |
495 | dirent->proc_fops = e->proc_fops; | |
496 | dirent->owner = THIS_MODULE; | |
497 | e->dirent = dirent; | |
498 | } | |
499 | ret = 0; | |
500 | out: | |
501 | return ret; | |
502 | ||
503 | err_out_remove: | |
504 | atm_proc_dirs_remove(); | |
505 | err_out: | |
506 | ret = -ENOMEM; | |
507 | goto out; | |
508 | } | |
509 | ||
b9c6e3e9 | 510 | void atm_proc_exit(void) |
1da177e4 LT |
511 | { |
512 | atm_proc_dirs_remove(); | |
513 | } |