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11#include <linux/module.h>
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>
25#include <net/net_namespace.h>
26#include <net/atmclip.h>
27#include <asm/uaccess.h>
28#include <asm/atomic.h>
29#include <asm/param.h>
30#include "resources.h"
31#include "common.h"
32#include "signaling.h"
33
34static ssize_t proc_dev_atm_read(struct file *file,char __user *buf,size_t count,
35 loff_t *pos);
36
37static const 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 == SEQ_START_TOKEN) {
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 = SEQ_START_TOKEN;
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, const struct seq_operations *ops)
115{
116 struct vcc_state *state;
117
118 state = __seq_open_private(file, ops, sizeof(*state));
119 if (state == NULL)
120 return -ENOMEM;
121
122 state->family = family;
123 return 0;
124}
125
126static void *vcc_seq_start(struct seq_file *seq, loff_t *pos)
127 __acquires(vcc_sklist_lock)
128{
129 struct vcc_state *state = seq->private;
130 loff_t left = *pos;
131
132 read_lock(&vcc_sklist_lock);
133 state->sk = SEQ_START_TOKEN;
134 return left ? vcc_walk(state, left) : SEQ_START_TOKEN;
135}
136
137static void vcc_seq_stop(struct seq_file *seq, void *v)
138 __releases(vcc_sklist_lock)
139{
140 read_unlock(&vcc_sklist_lock);
141}
142
143static 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
152static void pvc_info(struct seq_file *seq, struct atm_vcc *vcc)
153{
154 static const char *const class_name[] =
155 {"off","UBR","CBR","VBR","ABR"};
156 static const char *const aal_name[] = {
157 "---", "1", "2", "3/4",
158 "???", "5", "???", "???",
159 "???", "???", "???", "???",
160 "???", "0", "???", "???"};
161
162 seq_printf(seq, "%3d %3d %5d %-3s %7d %-5s %7d %-6s",
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],vcc->qos.txtp.min_pcr,
167 class_name[vcc->qos.txtp.traffic_class]);
168 if (test_bit(ATM_VF_IS_CLIP, &vcc->flags)) {
169 struct clip_vcc *clip_vcc = CLIP_VCC(vcc);
170 struct net_device *dev;
171
172 dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : NULL;
173 seq_printf(seq, "CLIP, Itf:%s, Encap:",
174 dev ? dev->name : "none?");
175 seq_printf(seq, "%s", clip_vcc->encap ? "LLC/SNAP" : "None");
176 }
177 seq_putc(seq, '\n');
178}
179
180static const char *vcc_state(struct atm_vcc *vcc)
181{
182 static const char *const map[] = { ATM_VS2TXT_MAP };
183
184 return map[ATM_VF2VS(vcc->flags)];
185}
186
187static void vcc_info(struct seq_file *seq, struct atm_vcc *vcc)
188{
189 struct sock *sk = sk_atm(vcc);
190
191 seq_printf(seq, "%p ", vcc);
192 if (!vcc->dev)
193 seq_printf(seq, "Unassigned ");
194 else
195 seq_printf(seq, "%3d %3d %5d ", vcc->dev->number, vcc->vpi,
196 vcc->vci);
197 switch (sk->sk_family) {
198 case AF_ATMPVC:
199 seq_printf(seq, "PVC");
200 break;
201 case AF_ATMSVC:
202 seq_printf(seq, "SVC");
203 break;
204 default:
205 seq_printf(seq, "%3d", sk->sk_family);
206 }
207 seq_printf(seq, " %04lx %5d %7d/%7d %7d/%7d [%d]\n", vcc->flags, sk->sk_err,
208 sk_wmem_alloc_get(sk), sk->sk_sndbuf,
209 sk_rmem_alloc_get(sk), sk->sk_rcvbuf,
210 atomic_read(&sk->sk_refcnt));
211}
212
213static void svc_info(struct seq_file *seq, struct atm_vcc *vcc)
214{
215 if (!vcc->dev)
216 seq_printf(seq, sizeof(void *) == 4 ?
217 "N/A@%p%10s" : "N/A@%p%2s", vcc, "");
218 else
219 seq_printf(seq, "%3d %3d %5d ",
220 vcc->dev->number, vcc->vpi, vcc->vci);
221 seq_printf(seq, "%-10s ", vcc_state(vcc));
222 seq_printf(seq, "%s%s", vcc->remote.sas_addr.pub,
223 *vcc->remote.sas_addr.pub && *vcc->remote.sas_addr.prv ? "+" : "");
224 if (*vcc->remote.sas_addr.prv) {
225 int i;
226
227 for (i = 0; i < ATM_ESA_LEN; i++)
228 seq_printf(seq, "%02x", vcc->remote.sas_addr.prv[i]);
229 }
230 seq_putc(seq, '\n');
231}
232
233static int atm_dev_seq_show(struct seq_file *seq, void *v)
234{
235 static char atm_dev_banner[] =
236 "Itf Type ESI/\"MAC\"addr "
237 "AAL(TX,err,RX,err,drop) ... [refcnt]\n";
238
239 if (v == SEQ_START_TOKEN)
240 seq_puts(seq, atm_dev_banner);
241 else {
242 struct atm_dev *dev = list_entry(v, struct atm_dev, dev_list);
243
244 atm_dev_info(seq, dev);
245 }
246 return 0;
247}
248
249static const struct seq_operations atm_dev_seq_ops = {
250 .start = atm_dev_seq_start,
251 .next = atm_dev_seq_next,
252 .stop = atm_dev_seq_stop,
253 .show = atm_dev_seq_show,
254};
255
256static int atm_dev_seq_open(struct inode *inode, struct file *file)
257{
258 return seq_open(file, &atm_dev_seq_ops);
259}
260
261static const struct file_operations devices_seq_fops = {
262 .open = atm_dev_seq_open,
263 .read = seq_read,
264 .llseek = seq_lseek,
265 .release = seq_release,
266};
267
268static int pvc_seq_show(struct seq_file *seq, void *v)
269{
270 static char atm_pvc_banner[] =
271 "Itf VPI VCI AAL RX(PCR,Class) TX(PCR,Class)\n";
272
273 if (v == SEQ_START_TOKEN)
274 seq_puts(seq, atm_pvc_banner);
275 else {
276 struct vcc_state *state = seq->private;
277 struct atm_vcc *vcc = atm_sk(state->sk);
278
279 pvc_info(seq, vcc);
280 }
281 return 0;
282}
283
284static const struct seq_operations pvc_seq_ops = {
285 .start = vcc_seq_start,
286 .next = vcc_seq_next,
287 .stop = vcc_seq_stop,
288 .show = pvc_seq_show,
289};
290
291static int pvc_seq_open(struct inode *inode, struct file *file)
292{
293 return __vcc_seq_open(inode, file, PF_ATMPVC, &pvc_seq_ops);
294}
295
296static const struct file_operations pvc_seq_fops = {
297 .open = pvc_seq_open,
298 .read = seq_read,
299 .llseek = seq_lseek,
300 .release = seq_release_private,
301};
302
303static int vcc_seq_show(struct seq_file *seq, void *v)
304{
305 if (v == SEQ_START_TOKEN) {
306 seq_printf(seq, sizeof(void *) == 4 ? "%-8s%s" : "%-16s%s",
307 "Address ", "Itf VPI VCI Fam Flags Reply "
308 "Send buffer Recv buffer [refcnt]\n");
309 } else {
310 struct vcc_state *state = seq->private;
311 struct atm_vcc *vcc = atm_sk(state->sk);
312
313 vcc_info(seq, vcc);
314 }
315 return 0;
316}
317
318static const struct seq_operations vcc_seq_ops = {
319 .start = vcc_seq_start,
320 .next = vcc_seq_next,
321 .stop = vcc_seq_stop,
322 .show = vcc_seq_show,
323};
324
325static int vcc_seq_open(struct inode *inode, struct file *file)
326{
327 return __vcc_seq_open(inode, file, 0, &vcc_seq_ops);
328}
329
330static const struct file_operations vcc_seq_fops = {
331 .open = vcc_seq_open,
332 .read = seq_read,
333 .llseek = seq_lseek,
334 .release = seq_release_private,
335};
336
337static int svc_seq_show(struct seq_file *seq, void *v)
338{
339 static const char atm_svc_banner[] =
340 "Itf VPI VCI State Remote\n";
341
342 if (v == SEQ_START_TOKEN)
343 seq_puts(seq, atm_svc_banner);
344 else {
345 struct vcc_state *state = seq->private;
346 struct atm_vcc *vcc = atm_sk(state->sk);
347
348 svc_info(seq, vcc);
349 }
350 return 0;
351}
352
353static const struct seq_operations svc_seq_ops = {
354 .start = vcc_seq_start,
355 .next = vcc_seq_next,
356 .stop = vcc_seq_stop,
357 .show = svc_seq_show,
358};
359
360static int svc_seq_open(struct inode *inode, struct file *file)
361{
362 return __vcc_seq_open(inode, file, PF_ATMSVC, &svc_seq_ops);
363}
364
365static const struct file_operations svc_seq_fops = {
366 .open = svc_seq_open,
367 .read = seq_read,
368 .llseek = seq_lseek,
369 .release = seq_release_private,
370};
371
372static ssize_t proc_dev_atm_read(struct file *file, char __user *buf,
373 size_t count, loff_t *pos)
374{
375 struct atm_dev *dev;
376 unsigned long page;
377 int length;
378
379 if (count == 0) return 0;
380 page = get_zeroed_page(GFP_KERNEL);
381 if (!page) return -ENOMEM;
382 dev = PDE(file->f_path.dentry->d_inode)->data;
383 if (!dev->ops->proc_read)
384 length = -EINVAL;
385 else {
386 length = dev->ops->proc_read(dev,pos,(char *) page);
387 if (length > count) length = -EINVAL;
388 }
389 if (length >= 0) {
390 if (copy_to_user(buf,(char *) page,length)) length = -EFAULT;
391 (*pos)++;
392 }
393 free_page(page);
394 return length;
395}
396
397
398struct proc_dir_entry *atm_proc_root;
399EXPORT_SYMBOL(atm_proc_root);
400
401
402int atm_proc_dev_register(struct atm_dev *dev)
403{
404 int digits,num;
405 int error;
406
407
408 if (!dev->ops->proc_read)
409 return 0;
410
411 error = -ENOMEM;
412 digits = 0;
413 for (num = dev->number; num; num /= 10) digits++;
414 if (!digits) digits++;
415
416 dev->proc_name = kmalloc(strlen(dev->type) + digits + 2, GFP_KERNEL);
417 if (!dev->proc_name)
418 goto err_out;
419 sprintf(dev->proc_name,"%s:%d",dev->type, dev->number);
420
421 dev->proc_entry = proc_create_data(dev->proc_name, 0, atm_proc_root,
422 &proc_atm_dev_ops, dev);
423 if (!dev->proc_entry)
424 goto err_free_name;
425 return 0;
426err_free_name:
427 kfree(dev->proc_name);
428err_out:
429 return error;
430}
431
432
433void atm_proc_dev_deregister(struct atm_dev *dev)
434{
435 if (!dev->ops->proc_read)
436 return;
437
438 remove_proc_entry(dev->proc_name, atm_proc_root);
439 kfree(dev->proc_name);
440}
441
442static struct atm_proc_entry {
443 char *name;
444 const struct file_operations *proc_fops;
445 struct proc_dir_entry *dirent;
446} atm_proc_ents[] = {
447 { .name = "devices", .proc_fops = &devices_seq_fops },
448 { .name = "pvc", .proc_fops = &pvc_seq_fops },
449 { .name = "svc", .proc_fops = &svc_seq_fops },
450 { .name = "vc", .proc_fops = &vcc_seq_fops },
451 { .name = NULL, .proc_fops = NULL }
452};
453
454static void atm_proc_dirs_remove(void)
455{
456 static struct atm_proc_entry *e;
457
458 for (e = atm_proc_ents; e->name; e++) {
459 if (e->dirent)
460 remove_proc_entry(e->name, atm_proc_root);
461 }
462 proc_net_remove(&init_net, "atm");
463}
464
465int __init atm_proc_init(void)
466{
467 static struct atm_proc_entry *e;
468 int ret;
469
470 atm_proc_root = proc_net_mkdir(&init_net, "atm", init_net.proc_net);
471 if (!atm_proc_root)
472 goto err_out;
473 for (e = atm_proc_ents; e->name; e++) {
474 struct proc_dir_entry *dirent;
475
476 dirent = proc_create(e->name, S_IRUGO,
477 atm_proc_root, e->proc_fops);
478 if (!dirent)
479 goto err_out_remove;
480 e->dirent = dirent;
481 }
482 ret = 0;
483out:
484 return ret;
485
486err_out_remove:
487 atm_proc_dirs_remove();
488err_out:
489 ret = -ENOMEM;
490 goto out;
491}
492
493void atm_proc_exit(void)
494{
495 atm_proc_dirs_remove();
496}
497
