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Commit | Line | Data |
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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 | 26 | #include <net/atmclip.h> |
07367adb JP |
27 | #include <linux/uaccess.h> |
28 | #include <linux/param.h> /* for HZ */ | |
1da177e4 | 29 | #include <asm/atomic.h> |
1da177e4 LT |
30 | #include "resources.h" |
31 | #include "common.h" /* atm_proc_init prototype */ | |
32 | #include "signaling.h" /* to get sigd - ugly too */ | |
33 | ||
07367adb JP |
34 | static ssize_t proc_dev_atm_read(struct file *file, char __user *buf, |
35 | size_t count, loff_t *pos); | |
1da177e4 | 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, | |
07367adb JP |
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)); | |
1da177e4 LT |
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 | { | |
07367adb JP |
154 | static const char *const class_name[] = { |
155 | "off", "UBR", "CBR", "VBR", "ABR"}; | |
36cbd3dc | 156 | static const char *const aal_name[] = { |
1da177e4 LT |
157 | "---", "1", "2", "3/4", /* 0- 3 */ |
158 | "???", "5", "???", "???", /* 4- 7 */ | |
159 | "???", "???", "???", "???", /* 8-11 */ | |
160 | "???", "0", "???", "???"}; /* 12-15 */ | |
161 | ||
162 | seq_printf(seq, "%3d %3d %5d %-3s %7d %-5s %7d %-6s", | |
07367adb JP |
163 | vcc->dev->number, vcc->vpi, vcc->vci, |
164 | vcc->qos.aal >= ARRAY_SIZE(aal_name) ? "err" : | |
165 | aal_name[vcc->qos.aal], vcc->qos.rxtp.min_pcr, | |
166 | class_name[vcc->qos.rxtp.traffic_class], | |
167 | vcc->qos.txtp.min_pcr, | |
168 | class_name[vcc->qos.txtp.traffic_class]); | |
1da177e4 LT |
169 | if (test_bit(ATM_VF_IS_CLIP, &vcc->flags)) { |
170 | struct clip_vcc *clip_vcc = CLIP_VCC(vcc); | |
171 | struct net_device *dev; | |
172 | ||
173 | dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : NULL; | |
174 | seq_printf(seq, "CLIP, Itf:%s, Encap:", | |
175 | dev ? dev->name : "none?"); | |
176 | seq_printf(seq, "%s", clip_vcc->encap ? "LLC/SNAP" : "None"); | |
177 | } | |
178 | seq_putc(seq, '\n'); | |
179 | } | |
180 | ||
181 | static const char *vcc_state(struct atm_vcc *vcc) | |
182 | { | |
36cbd3dc | 183 | static const char *const map[] = { ATM_VS2TXT_MAP }; |
1da177e4 LT |
184 | |
185 | return map[ATM_VF2VS(vcc->flags)]; | |
186 | } | |
187 | ||
188 | static void vcc_info(struct seq_file *seq, struct atm_vcc *vcc) | |
189 | { | |
190 | struct sock *sk = sk_atm(vcc); | |
191 | ||
192 | seq_printf(seq, "%p ", vcc); | |
193 | if (!vcc->dev) | |
194 | seq_printf(seq, "Unassigned "); | |
f7d57453 | 195 | else |
1da177e4 LT |
196 | seq_printf(seq, "%3d %3d %5d ", vcc->dev->number, vcc->vpi, |
197 | vcc->vci); | |
198 | switch (sk->sk_family) { | |
07367adb JP |
199 | case AF_ATMPVC: |
200 | seq_printf(seq, "PVC"); | |
201 | break; | |
202 | case AF_ATMSVC: | |
203 | seq_printf(seq, "SVC"); | |
204 | break; | |
205 | default: | |
206 | seq_printf(seq, "%3d", sk->sk_family); | |
1da177e4 | 207 | } |
07367adb JP |
208 | seq_printf(seq, " %04lx %5d %7d/%7d %7d/%7d [%d]\n", |
209 | vcc->flags, sk->sk_err, | |
210 | sk_wmem_alloc_get(sk), sk->sk_sndbuf, | |
211 | sk_rmem_alloc_get(sk), sk->sk_rcvbuf, | |
212 | atomic_read(&sk->sk_refcnt)); | |
1da177e4 LT |
213 | } |
214 | ||
215 | static void svc_info(struct seq_file *seq, struct atm_vcc *vcc) | |
216 | { | |
217 | if (!vcc->dev) | |
218 | seq_printf(seq, sizeof(void *) == 4 ? | |
219 | "N/A@%p%10s" : "N/A@%p%2s", vcc, ""); | |
220 | else | |
221 | seq_printf(seq, "%3d %3d %5d ", | |
222 | vcc->dev->number, vcc->vpi, vcc->vci); | |
223 | seq_printf(seq, "%-10s ", vcc_state(vcc)); | |
224 | seq_printf(seq, "%s%s", vcc->remote.sas_addr.pub, | |
225 | *vcc->remote.sas_addr.pub && *vcc->remote.sas_addr.prv ? "+" : ""); | |
226 | if (*vcc->remote.sas_addr.prv) { | |
227 | int i; | |
228 | ||
229 | for (i = 0; i < ATM_ESA_LEN; i++) | |
230 | seq_printf(seq, "%02x", vcc->remote.sas_addr.prv[i]); | |
231 | } | |
232 | seq_putc(seq, '\n'); | |
233 | } | |
234 | ||
235 | static int atm_dev_seq_show(struct seq_file *seq, void *v) | |
236 | { | |
237 | static char atm_dev_banner[] = | |
238 | "Itf Type ESI/\"MAC\"addr " | |
239 | "AAL(TX,err,RX,err,drop) ... [refcnt]\n"; | |
f7d57453 | 240 | |
2e1e9848 | 241 | if (v == SEQ_START_TOKEN) |
1da177e4 LT |
242 | seq_puts(seq, atm_dev_banner); |
243 | else { | |
244 | struct atm_dev *dev = list_entry(v, struct atm_dev, dev_list); | |
245 | ||
246 | atm_dev_info(seq, dev); | |
247 | } | |
f7d57453 | 248 | return 0; |
1da177e4 | 249 | } |
f7d57453 | 250 | |
56b3d975 | 251 | static const struct seq_operations atm_dev_seq_ops = { |
1da177e4 LT |
252 | .start = atm_dev_seq_start, |
253 | .next = atm_dev_seq_next, | |
254 | .stop = atm_dev_seq_stop, | |
255 | .show = atm_dev_seq_show, | |
256 | }; | |
f7d57453 | 257 | |
1da177e4 LT |
258 | static int atm_dev_seq_open(struct inode *inode, struct file *file) |
259 | { | |
260 | return seq_open(file, &atm_dev_seq_ops); | |
261 | } | |
f7d57453 | 262 | |
9a32144e | 263 | static const struct file_operations devices_seq_fops = { |
1da177e4 LT |
264 | .open = atm_dev_seq_open, |
265 | .read = seq_read, | |
266 | .llseek = seq_lseek, | |
267 | .release = seq_release, | |
268 | }; | |
269 | ||
270 | static int pvc_seq_show(struct seq_file *seq, void *v) | |
271 | { | |
f7d57453 | 272 | static char atm_pvc_banner[] = |
1da177e4 LT |
273 | "Itf VPI VCI AAL RX(PCR,Class) TX(PCR,Class)\n"; |
274 | ||
2e1e9848 | 275 | if (v == SEQ_START_TOKEN) |
1da177e4 LT |
276 | seq_puts(seq, atm_pvc_banner); |
277 | else { | |
278 | struct vcc_state *state = seq->private; | |
279 | struct atm_vcc *vcc = atm_sk(state->sk); | |
280 | ||
281 | pvc_info(seq, vcc); | |
282 | } | |
283 | return 0; | |
284 | } | |
285 | ||
56b3d975 | 286 | static const struct seq_operations pvc_seq_ops = { |
1da177e4 LT |
287 | .start = vcc_seq_start, |
288 | .next = vcc_seq_next, | |
289 | .stop = vcc_seq_stop, | |
290 | .show = pvc_seq_show, | |
291 | }; | |
292 | ||
293 | static int pvc_seq_open(struct inode *inode, struct file *file) | |
294 | { | |
295 | return __vcc_seq_open(inode, file, PF_ATMPVC, &pvc_seq_ops); | |
296 | } | |
297 | ||
9a32144e | 298 | static const struct file_operations pvc_seq_fops = { |
1da177e4 LT |
299 | .open = pvc_seq_open, |
300 | .read = seq_read, | |
301 | .llseek = seq_lseek, | |
9a8c09e7 | 302 | .release = seq_release_private, |
1da177e4 LT |
303 | }; |
304 | ||
305 | static int vcc_seq_show(struct seq_file *seq, void *v) | |
306 | { | |
2e1e9848 | 307 | if (v == SEQ_START_TOKEN) { |
f7d57453 YH |
308 | seq_printf(seq, sizeof(void *) == 4 ? "%-8s%s" : "%-16s%s", |
309 | "Address ", "Itf VPI VCI Fam Flags Reply " | |
310 | "Send buffer Recv buffer [refcnt]\n"); | |
311 | } else { | |
312 | struct vcc_state *state = seq->private; | |
313 | struct atm_vcc *vcc = atm_sk(state->sk); | |
314 | ||
315 | vcc_info(seq, vcc); | |
316 | } | |
317 | return 0; | |
1da177e4 | 318 | } |
f7d57453 | 319 | |
56b3d975 | 320 | static const struct seq_operations vcc_seq_ops = { |
f7d57453 YH |
321 | .start = vcc_seq_start, |
322 | .next = vcc_seq_next, | |
323 | .stop = vcc_seq_stop, | |
324 | .show = vcc_seq_show, | |
1da177e4 | 325 | }; |
f7d57453 | 326 | |
1da177e4 LT |
327 | static int vcc_seq_open(struct inode *inode, struct file *file) |
328 | { | |
f7d57453 | 329 | return __vcc_seq_open(inode, file, 0, &vcc_seq_ops); |
1da177e4 | 330 | } |
f7d57453 | 331 | |
9a32144e | 332 | static const struct file_operations vcc_seq_fops = { |
1da177e4 LT |
333 | .open = vcc_seq_open, |
334 | .read = seq_read, | |
335 | .llseek = seq_lseek, | |
9a8c09e7 | 336 | .release = seq_release_private, |
1da177e4 LT |
337 | }; |
338 | ||
339 | static int svc_seq_show(struct seq_file *seq, void *v) | |
340 | { | |
36cbd3dc | 341 | static const char atm_svc_banner[] = |
1da177e4 LT |
342 | "Itf VPI VCI State Remote\n"; |
343 | ||
2e1e9848 | 344 | if (v == SEQ_START_TOKEN) |
1da177e4 LT |
345 | seq_puts(seq, atm_svc_banner); |
346 | else { | |
347 | struct vcc_state *state = seq->private; | |
348 | struct atm_vcc *vcc = atm_sk(state->sk); | |
349 | ||
350 | svc_info(seq, vcc); | |
351 | } | |
352 | return 0; | |
353 | } | |
354 | ||
56b3d975 | 355 | static const struct seq_operations svc_seq_ops = { |
1da177e4 LT |
356 | .start = vcc_seq_start, |
357 | .next = vcc_seq_next, | |
358 | .stop = vcc_seq_stop, | |
359 | .show = svc_seq_show, | |
360 | }; | |
361 | ||
362 | static int svc_seq_open(struct inode *inode, struct file *file) | |
363 | { | |
364 | return __vcc_seq_open(inode, file, PF_ATMSVC, &svc_seq_ops); | |
365 | } | |
366 | ||
9a32144e | 367 | static const struct file_operations svc_seq_fops = { |
1da177e4 LT |
368 | .open = svc_seq_open, |
369 | .read = seq_read, | |
370 | .llseek = seq_lseek, | |
9a8c09e7 | 371 | .release = seq_release_private, |
1da177e4 LT |
372 | }; |
373 | ||
374 | static ssize_t proc_dev_atm_read(struct file *file, char __user *buf, | |
375 | size_t count, loff_t *pos) | |
376 | { | |
377 | struct atm_dev *dev; | |
378 | unsigned long page; | |
379 | int length; | |
380 | ||
07367adb JP |
381 | if (count == 0) |
382 | return 0; | |
1da177e4 | 383 | page = get_zeroed_page(GFP_KERNEL); |
07367adb JP |
384 | if (!page) |
385 | return -ENOMEM; | |
76a0f174 | 386 | dev = PDE(file->f_path.dentry->d_inode)->data; |
1da177e4 LT |
387 | if (!dev->ops->proc_read) |
388 | length = -EINVAL; | |
389 | else { | |
07367adb JP |
390 | length = dev->ops->proc_read(dev, pos, (char *)page); |
391 | if (length > count) | |
392 | length = -EINVAL; | |
1da177e4 LT |
393 | } |
394 | if (length >= 0) { | |
07367adb JP |
395 | if (copy_to_user(buf, (char *)page, length)) |
396 | length = -EFAULT; | |
1da177e4 LT |
397 | (*pos)++; |
398 | } | |
399 | free_page(page); | |
400 | return length; | |
401 | } | |
402 | ||
1da177e4 LT |
403 | struct proc_dir_entry *atm_proc_root; |
404 | EXPORT_SYMBOL(atm_proc_root); | |
405 | ||
406 | ||
407 | int atm_proc_dev_register(struct atm_dev *dev) | |
408 | { | |
07367adb | 409 | int digits, num; |
1da177e4 LT |
410 | int error; |
411 | ||
412 | /* No proc info */ | |
413 | if (!dev->ops->proc_read) | |
414 | return 0; | |
415 | ||
416 | error = -ENOMEM; | |
417 | digits = 0; | |
07367adb JP |
418 | for (num = dev->number; num; num /= 10) |
419 | digits++; | |
420 | if (!digits) | |
421 | digits++; | |
1da177e4 LT |
422 | |
423 | dev->proc_name = kmalloc(strlen(dev->type) + digits + 2, GFP_KERNEL); | |
424 | if (!dev->proc_name) | |
425 | goto err_out; | |
07367adb | 426 | sprintf(dev->proc_name, "%s:%d", dev->type, dev->number); |
1da177e4 | 427 | |
0c89652a DL |
428 | dev->proc_entry = proc_create_data(dev->proc_name, 0, atm_proc_root, |
429 | &proc_atm_dev_ops, dev); | |
1da177e4 LT |
430 | if (!dev->proc_entry) |
431 | goto err_free_name; | |
1da177e4 | 432 | return 0; |
07367adb | 433 | |
1da177e4 LT |
434 | err_free_name: |
435 | kfree(dev->proc_name); | |
436 | err_out: | |
437 | return error; | |
438 | } | |
439 | ||
1da177e4 LT |
440 | void atm_proc_dev_deregister(struct atm_dev *dev) |
441 | { | |
442 | if (!dev->ops->proc_read) | |
443 | return; | |
444 | ||
445 | remove_proc_entry(dev->proc_name, atm_proc_root); | |
446 | kfree(dev->proc_name); | |
447 | } | |
448 | ||
449 | static struct atm_proc_entry { | |
450 | char *name; | |
9a32144e | 451 | const struct file_operations *proc_fops; |
1da177e4 LT |
452 | struct proc_dir_entry *dirent; |
453 | } atm_proc_ents[] = { | |
454 | { .name = "devices", .proc_fops = &devices_seq_fops }, | |
455 | { .name = "pvc", .proc_fops = &pvc_seq_fops }, | |
456 | { .name = "svc", .proc_fops = &svc_seq_fops }, | |
457 | { .name = "vc", .proc_fops = &vcc_seq_fops }, | |
458 | { .name = NULL, .proc_fops = NULL } | |
459 | }; | |
460 | ||
461 | static void atm_proc_dirs_remove(void) | |
462 | { | |
463 | static struct atm_proc_entry *e; | |
464 | ||
465 | for (e = atm_proc_ents; e->name; e++) { | |
f7d57453 | 466 | if (e->dirent) |
1da177e4 LT |
467 | remove_proc_entry(e->name, atm_proc_root); |
468 | } | |
e5d69b9f | 469 | proc_net_remove(&init_net, "atm"); |
1da177e4 LT |
470 | } |
471 | ||
472 | int __init atm_proc_init(void) | |
473 | { | |
474 | static struct atm_proc_entry *e; | |
475 | int ret; | |
476 | ||
e5d69b9f | 477 | atm_proc_root = proc_net_mkdir(&init_net, "atm", init_net.proc_net); |
1da177e4 LT |
478 | if (!atm_proc_root) |
479 | goto err_out; | |
480 | for (e = atm_proc_ents; e->name; e++) { | |
481 | struct proc_dir_entry *dirent; | |
482 | ||
16e297b3 WC |
483 | dirent = proc_create(e->name, S_IRUGO, |
484 | atm_proc_root, e->proc_fops); | |
1da177e4 LT |
485 | if (!dirent) |
486 | goto err_out_remove; | |
1da177e4 LT |
487 | e->dirent = dirent; |
488 | } | |
489 | ret = 0; | |
490 | out: | |
491 | return ret; | |
492 | ||
493 | err_out_remove: | |
494 | atm_proc_dirs_remove(); | |
495 | err_out: | |
496 | ret = -ENOMEM; | |
497 | goto out; | |
498 | } | |
499 | ||
b9c6e3e9 | 500 | void atm_proc_exit(void) |
1da177e4 LT |
501 | { |
502 | atm_proc_dirs_remove(); | |
503 | } |