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 */ | |
457c4cbc | 25 | #include <net/net_namespace.h> |
1da177e4 LT |
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 | ||
34 | static ssize_t proc_dev_atm_read(struct file *file,char __user *buf,size_t count, | |
35 | loff_t *pos); | |
36 | ||
9a32144e | 37 | static const struct file_operations proc_atm_dev_ops = { |
1da177e4 LT |
38 | .owner = THIS_MODULE, |
39 | .read = proc_dev_atm_read, | |
40 | }; | |
41 | ||
42 | static 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 | ||
51 | static 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 | ||
66 | struct vcc_state { | |
67 | int bucket; | |
68 | struct sock *sk; | |
69 | int family; | |
70 | }; | |
71 | ||
72 | static inline int compare_family(struct sock *sk, int family) | |
73 | { | |
74 | return !family || (sk->sk_family == family); | |
75 | } | |
76 | ||
77 | static int __vcc_walk(struct sock **sock, int family, int *bucket, loff_t l) | |
78 | { | |
79 | struct sock *sk = *sock; | |
80 | ||
2e1e9848 | 81 | if (sk == SEQ_START_TOKEN) { |
1da177e4 LT |
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--; | |
f7d57453 | 90 | } |
1da177e4 LT |
91 | try_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 | } | |
2e1e9848 | 101 | sk = SEQ_START_TOKEN; |
1da177e4 LT |
102 | out: |
103 | *sock = sk; | |
104 | return (l < 0); | |
105 | } | |
106 | ||
107 | static 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 | ||
113 | static int __vcc_seq_open(struct inode *inode, struct file *file, | |
ececfdee | 114 | int family, const struct seq_operations *ops) |
1da177e4 LT |
115 | { |
116 | struct vcc_state *state; | |
1da177e4 | 117 | |
9a8c09e7 PE |
118 | state = __seq_open_private(file, ops, sizeof(*state)); |
119 | if (state == NULL) | |
120 | return -ENOMEM; | |
1da177e4 LT |
121 | |
122 | state->family = family; | |
9a8c09e7 | 123 | return 0; |
1da177e4 LT |
124 | } |
125 | ||
126 | static void *vcc_seq_start(struct seq_file *seq, loff_t *pos) | |
5c17d5f1 | 127 | __acquires(vcc_sklist_lock) |
1da177e4 LT |
128 | { |
129 | struct vcc_state *state = seq->private; | |
130 | loff_t left = *pos; | |
131 | ||
132 | read_lock(&vcc_sklist_lock); | |
2e1e9848 JP |
133 | state->sk = SEQ_START_TOKEN; |
134 | return left ? vcc_walk(state, left) : SEQ_START_TOKEN; | |
1da177e4 LT |
135 | } |
136 | ||
137 | static void vcc_seq_stop(struct seq_file *seq, void *v) | |
5c17d5f1 | 138 | __releases(vcc_sklist_lock) |
1da177e4 LT |
139 | { |
140 | read_unlock(&vcc_sklist_lock); | |
141 | } | |
142 | ||
143 | static void *vcc_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
144 | { | |
145 | struct vcc_state *state = seq->private; | |
146 | ||
147 | v = vcc_walk(state, 1); | |
148 | *pos += !!PTR_ERR(v); | |
149 | return v; | |
150 | } | |
151 | ||
152 | static void pvc_info(struct seq_file *seq, struct atm_vcc *vcc) | |
153 | { | |
154 | static const char *class_name[] = { "off","UBR","CBR","VBR","ABR" }; | |
155 | static const char *aal_name[] = { | |
156 | "---", "1", "2", "3/4", /* 0- 3 */ | |
157 | "???", "5", "???", "???", /* 4- 7 */ | |
158 | "???", "???", "???", "???", /* 8-11 */ | |
159 | "???", "0", "???", "???"}; /* 12-15 */ | |
160 | ||
161 | seq_printf(seq, "%3d %3d %5d %-3s %7d %-5s %7d %-6s", | |
162 | vcc->dev->number,vcc->vpi,vcc->vci, | |
8b14a536 | 163 | vcc->qos.aal >= ARRAY_SIZE(aal_name) ? "err" : |
1da177e4 LT |
164 | aal_name[vcc->qos.aal],vcc->qos.rxtp.min_pcr, |
165 | class_name[vcc->qos.rxtp.traffic_class],vcc->qos.txtp.min_pcr, | |
166 | class_name[vcc->qos.txtp.traffic_class]); | |
167 | if (test_bit(ATM_VF_IS_CLIP, &vcc->flags)) { | |
168 | struct clip_vcc *clip_vcc = CLIP_VCC(vcc); | |
169 | struct net_device *dev; | |
170 | ||
171 | dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : NULL; | |
172 | seq_printf(seq, "CLIP, Itf:%s, Encap:", | |
173 | dev ? dev->name : "none?"); | |
174 | seq_printf(seq, "%s", clip_vcc->encap ? "LLC/SNAP" : "None"); | |
175 | } | |
176 | seq_putc(seq, '\n'); | |
177 | } | |
178 | ||
179 | static const char *vcc_state(struct atm_vcc *vcc) | |
180 | { | |
181 | static const char *map[] = { ATM_VS2TXT_MAP }; | |
182 | ||
183 | return map[ATM_VF2VS(vcc->flags)]; | |
184 | } | |
185 | ||
186 | static void vcc_info(struct seq_file *seq, struct atm_vcc *vcc) | |
187 | { | |
188 | struct sock *sk = sk_atm(vcc); | |
189 | ||
190 | seq_printf(seq, "%p ", vcc); | |
191 | if (!vcc->dev) | |
192 | seq_printf(seq, "Unassigned "); | |
f7d57453 | 193 | else |
1da177e4 LT |
194 | seq_printf(seq, "%3d %3d %5d ", vcc->dev->number, vcc->vpi, |
195 | vcc->vci); | |
196 | switch (sk->sk_family) { | |
197 | case AF_ATMPVC: | |
198 | seq_printf(seq, "PVC"); | |
199 | break; | |
200 | case AF_ATMSVC: | |
201 | seq_printf(seq, "SVC"); | |
202 | break; | |
203 | default: | |
204 | seq_printf(seq, "%3d", sk->sk_family); | |
205 | } | |
206 | seq_printf(seq, " %04lx %5d %7d/%7d %7d/%7d [%d]\n", vcc->flags, sk->sk_err, | |
207 | atomic_read(&sk->sk_wmem_alloc), sk->sk_sndbuf, | |
208 | atomic_read(&sk->sk_rmem_alloc), sk->sk_rcvbuf, | |
209 | atomic_read(&sk->sk_refcnt)); | |
210 | } | |
211 | ||
212 | static void svc_info(struct seq_file *seq, struct atm_vcc *vcc) | |
213 | { | |
214 | if (!vcc->dev) | |
215 | seq_printf(seq, sizeof(void *) == 4 ? | |
216 | "N/A@%p%10s" : "N/A@%p%2s", vcc, ""); | |
217 | else | |
218 | seq_printf(seq, "%3d %3d %5d ", | |
219 | vcc->dev->number, vcc->vpi, vcc->vci); | |
220 | seq_printf(seq, "%-10s ", vcc_state(vcc)); | |
221 | seq_printf(seq, "%s%s", vcc->remote.sas_addr.pub, | |
222 | *vcc->remote.sas_addr.pub && *vcc->remote.sas_addr.prv ? "+" : ""); | |
223 | if (*vcc->remote.sas_addr.prv) { | |
224 | int i; | |
225 | ||
226 | for (i = 0; i < ATM_ESA_LEN; i++) | |
227 | seq_printf(seq, "%02x", vcc->remote.sas_addr.prv[i]); | |
228 | } | |
229 | seq_putc(seq, '\n'); | |
230 | } | |
231 | ||
232 | static int atm_dev_seq_show(struct seq_file *seq, void *v) | |
233 | { | |
234 | static char atm_dev_banner[] = | |
235 | "Itf Type ESI/\"MAC\"addr " | |
236 | "AAL(TX,err,RX,err,drop) ... [refcnt]\n"; | |
f7d57453 | 237 | |
2e1e9848 | 238 | if (v == SEQ_START_TOKEN) |
1da177e4 LT |
239 | seq_puts(seq, atm_dev_banner); |
240 | else { | |
241 | struct atm_dev *dev = list_entry(v, struct atm_dev, dev_list); | |
242 | ||
243 | atm_dev_info(seq, dev); | |
244 | } | |
f7d57453 | 245 | return 0; |
1da177e4 | 246 | } |
f7d57453 | 247 | |
56b3d975 | 248 | static const struct seq_operations atm_dev_seq_ops = { |
1da177e4 LT |
249 | .start = atm_dev_seq_start, |
250 | .next = atm_dev_seq_next, | |
251 | .stop = atm_dev_seq_stop, | |
252 | .show = atm_dev_seq_show, | |
253 | }; | |
f7d57453 | 254 | |
1da177e4 LT |
255 | static int atm_dev_seq_open(struct inode *inode, struct file *file) |
256 | { | |
257 | return seq_open(file, &atm_dev_seq_ops); | |
258 | } | |
f7d57453 | 259 | |
9a32144e | 260 | static const struct file_operations devices_seq_fops = { |
1da177e4 LT |
261 | .open = atm_dev_seq_open, |
262 | .read = seq_read, | |
263 | .llseek = seq_lseek, | |
264 | .release = seq_release, | |
265 | }; | |
266 | ||
267 | static int pvc_seq_show(struct seq_file *seq, void *v) | |
268 | { | |
f7d57453 | 269 | static char atm_pvc_banner[] = |
1da177e4 LT |
270 | "Itf VPI VCI AAL RX(PCR,Class) TX(PCR,Class)\n"; |
271 | ||
2e1e9848 | 272 | if (v == SEQ_START_TOKEN) |
1da177e4 LT |
273 | seq_puts(seq, atm_pvc_banner); |
274 | else { | |
275 | struct vcc_state *state = seq->private; | |
276 | struct atm_vcc *vcc = atm_sk(state->sk); | |
277 | ||
278 | pvc_info(seq, vcc); | |
279 | } | |
280 | return 0; | |
281 | } | |
282 | ||
56b3d975 | 283 | static const struct seq_operations pvc_seq_ops = { |
1da177e4 LT |
284 | .start = vcc_seq_start, |
285 | .next = vcc_seq_next, | |
286 | .stop = vcc_seq_stop, | |
287 | .show = pvc_seq_show, | |
288 | }; | |
289 | ||
290 | static int pvc_seq_open(struct inode *inode, struct file *file) | |
291 | { | |
292 | return __vcc_seq_open(inode, file, PF_ATMPVC, &pvc_seq_ops); | |
293 | } | |
294 | ||
9a32144e | 295 | static const struct file_operations pvc_seq_fops = { |
1da177e4 LT |
296 | .open = pvc_seq_open, |
297 | .read = seq_read, | |
298 | .llseek = seq_lseek, | |
9a8c09e7 | 299 | .release = seq_release_private, |
1da177e4 LT |
300 | }; |
301 | ||
302 | static int vcc_seq_show(struct seq_file *seq, void *v) | |
303 | { | |
2e1e9848 | 304 | if (v == SEQ_START_TOKEN) { |
f7d57453 YH |
305 | seq_printf(seq, sizeof(void *) == 4 ? "%-8s%s" : "%-16s%s", |
306 | "Address ", "Itf VPI VCI Fam Flags Reply " | |
307 | "Send buffer Recv buffer [refcnt]\n"); | |
308 | } else { | |
309 | struct vcc_state *state = seq->private; | |
310 | struct atm_vcc *vcc = atm_sk(state->sk); | |
311 | ||
312 | vcc_info(seq, vcc); | |
313 | } | |
314 | return 0; | |
1da177e4 | 315 | } |
f7d57453 | 316 | |
56b3d975 | 317 | static const struct seq_operations vcc_seq_ops = { |
f7d57453 YH |
318 | .start = vcc_seq_start, |
319 | .next = vcc_seq_next, | |
320 | .stop = vcc_seq_stop, | |
321 | .show = vcc_seq_show, | |
1da177e4 | 322 | }; |
f7d57453 | 323 | |
1da177e4 LT |
324 | static int vcc_seq_open(struct inode *inode, struct file *file) |
325 | { | |
f7d57453 | 326 | return __vcc_seq_open(inode, file, 0, &vcc_seq_ops); |
1da177e4 | 327 | } |
f7d57453 | 328 | |
9a32144e | 329 | static const struct file_operations vcc_seq_fops = { |
1da177e4 LT |
330 | .open = vcc_seq_open, |
331 | .read = seq_read, | |
332 | .llseek = seq_lseek, | |
9a8c09e7 | 333 | .release = seq_release_private, |
1da177e4 LT |
334 | }; |
335 | ||
336 | static int svc_seq_show(struct seq_file *seq, void *v) | |
337 | { | |
f7d57453 | 338 | static char atm_svc_banner[] = |
1da177e4 LT |
339 | "Itf VPI VCI State Remote\n"; |
340 | ||
2e1e9848 | 341 | if (v == SEQ_START_TOKEN) |
1da177e4 LT |
342 | seq_puts(seq, atm_svc_banner); |
343 | else { | |
344 | struct vcc_state *state = seq->private; | |
345 | struct atm_vcc *vcc = atm_sk(state->sk); | |
346 | ||
347 | svc_info(seq, vcc); | |
348 | } | |
349 | return 0; | |
350 | } | |
351 | ||
56b3d975 | 352 | static const struct seq_operations svc_seq_ops = { |
1da177e4 LT |
353 | .start = vcc_seq_start, |
354 | .next = vcc_seq_next, | |
355 | .stop = vcc_seq_stop, | |
356 | .show = svc_seq_show, | |
357 | }; | |
358 | ||
359 | static int svc_seq_open(struct inode *inode, struct file *file) | |
360 | { | |
361 | return __vcc_seq_open(inode, file, PF_ATMSVC, &svc_seq_ops); | |
362 | } | |
363 | ||
9a32144e | 364 | static const struct file_operations svc_seq_fops = { |
1da177e4 LT |
365 | .open = svc_seq_open, |
366 | .read = seq_read, | |
367 | .llseek = seq_lseek, | |
9a8c09e7 | 368 | .release = seq_release_private, |
1da177e4 LT |
369 | }; |
370 | ||
371 | static ssize_t proc_dev_atm_read(struct file *file, char __user *buf, | |
372 | size_t count, loff_t *pos) | |
373 | { | |
374 | struct atm_dev *dev; | |
375 | unsigned long page; | |
376 | int length; | |
377 | ||
378 | if (count == 0) return 0; | |
379 | page = get_zeroed_page(GFP_KERNEL); | |
380 | if (!page) return -ENOMEM; | |
76a0f174 | 381 | dev = PDE(file->f_path.dentry->d_inode)->data; |
1da177e4 LT |
382 | if (!dev->ops->proc_read) |
383 | length = -EINVAL; | |
384 | else { | |
385 | length = dev->ops->proc_read(dev,pos,(char *) page); | |
386 | if (length > count) length = -EINVAL; | |
387 | } | |
388 | if (length >= 0) { | |
389 | if (copy_to_user(buf,(char *) page,length)) length = -EFAULT; | |
390 | (*pos)++; | |
391 | } | |
392 | free_page(page); | |
393 | return length; | |
394 | } | |
395 | ||
396 | ||
397 | struct proc_dir_entry *atm_proc_root; | |
398 | EXPORT_SYMBOL(atm_proc_root); | |
399 | ||
400 | ||
401 | int atm_proc_dev_register(struct atm_dev *dev) | |
402 | { | |
403 | int digits,num; | |
404 | int error; | |
405 | ||
406 | /* No proc info */ | |
407 | if (!dev->ops->proc_read) | |
408 | return 0; | |
409 | ||
410 | error = -ENOMEM; | |
411 | digits = 0; | |
412 | for (num = dev->number; num; num /= 10) digits++; | |
413 | if (!digits) digits++; | |
414 | ||
415 | dev->proc_name = kmalloc(strlen(dev->type) + digits + 2, GFP_KERNEL); | |
416 | if (!dev->proc_name) | |
417 | goto err_out; | |
418 | sprintf(dev->proc_name,"%s:%d",dev->type, dev->number); | |
419 | ||
0c89652a DL |
420 | dev->proc_entry = proc_create_data(dev->proc_name, 0, atm_proc_root, |
421 | &proc_atm_dev_ops, dev); | |
1da177e4 LT |
422 | if (!dev->proc_entry) |
423 | goto err_free_name; | |
1da177e4 LT |
424 | return 0; |
425 | err_free_name: | |
426 | kfree(dev->proc_name); | |
427 | err_out: | |
428 | return error; | |
429 | } | |
430 | ||
431 | ||
432 | void atm_proc_dev_deregister(struct atm_dev *dev) | |
433 | { | |
434 | if (!dev->ops->proc_read) | |
435 | return; | |
436 | ||
437 | remove_proc_entry(dev->proc_name, atm_proc_root); | |
438 | kfree(dev->proc_name); | |
439 | } | |
440 | ||
441 | static struct atm_proc_entry { | |
442 | char *name; | |
9a32144e | 443 | const struct file_operations *proc_fops; |
1da177e4 LT |
444 | struct proc_dir_entry *dirent; |
445 | } atm_proc_ents[] = { | |
446 | { .name = "devices", .proc_fops = &devices_seq_fops }, | |
447 | { .name = "pvc", .proc_fops = &pvc_seq_fops }, | |
448 | { .name = "svc", .proc_fops = &svc_seq_fops }, | |
449 | { .name = "vc", .proc_fops = &vcc_seq_fops }, | |
450 | { .name = NULL, .proc_fops = NULL } | |
451 | }; | |
452 | ||
453 | static void atm_proc_dirs_remove(void) | |
454 | { | |
455 | static struct atm_proc_entry *e; | |
456 | ||
457 | for (e = atm_proc_ents; e->name; e++) { | |
f7d57453 | 458 | if (e->dirent) |
1da177e4 LT |
459 | remove_proc_entry(e->name, atm_proc_root); |
460 | } | |
e5d69b9f | 461 | proc_net_remove(&init_net, "atm"); |
1da177e4 LT |
462 | } |
463 | ||
464 | int __init atm_proc_init(void) | |
465 | { | |
466 | static struct atm_proc_entry *e; | |
467 | int ret; | |
468 | ||
e5d69b9f | 469 | atm_proc_root = proc_net_mkdir(&init_net, "atm", init_net.proc_net); |
1da177e4 LT |
470 | if (!atm_proc_root) |
471 | goto err_out; | |
472 | for (e = atm_proc_ents; e->name; e++) { | |
473 | struct proc_dir_entry *dirent; | |
474 | ||
16e297b3 WC |
475 | dirent = proc_create(e->name, S_IRUGO, |
476 | atm_proc_root, e->proc_fops); | |
1da177e4 LT |
477 | if (!dirent) |
478 | goto err_out_remove; | |
1da177e4 LT |
479 | e->dirent = dirent; |
480 | } | |
481 | ret = 0; | |
482 | out: | |
483 | return ret; | |
484 | ||
485 | err_out_remove: | |
486 | atm_proc_dirs_remove(); | |
487 | err_out: | |
488 | ret = -ENOMEM; | |
489 | goto out; | |
490 | } | |
491 | ||
b9c6e3e9 | 492 | void atm_proc_exit(void) |
1da177e4 LT |
493 | { |
494 | atm_proc_dirs_remove(); | |
495 | } |