1 /* net/atm/proc.c - ATM /proc interface
3 * Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA
5 * seq_file api usage by romieu@fr.zoreil.com
7 * Evaluating the efficiency of the whole thing if left as an exercise to
11 #include <linux/module.h> /* for EXPORT_SYMBOL */
12 #include <linux/string.h>
13 #include <linux/types.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/net_namespace.h>
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 */
34 static ssize_t proc_dev_atm_read(struct file *file,char __user *buf,size_t count,
37 static const struct file_operations proc_atm_dev_ops = {
39 .read = proc_dev_atm_read,
42 static void add_stats(struct seq_file *seq, const char *aal,
43 const struct k_atm_aal_stats *stats)
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));
51 static void atm_dev_info(struct seq_file *seq, const struct atm_dev *dev)
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]);
59 add_stats(seq, "0", &dev->stats.aal0);
61 add_stats(seq, "5", &dev->stats.aal5);
62 seq_printf(seq, "\t[%d]", atomic_read(&dev->refcnt));
72 static inline int compare_family(struct sock *sk, int family)
74 return !family || (sk->sk_family == family);
77 static int __vcc_walk(struct sock **sock, int family, int *bucket, loff_t l)
79 struct sock *sk = *sock;
81 if (sk == (void *)1) {
82 for (*bucket = 0; *bucket < VCC_HTABLE_SIZE; ++*bucket) {
83 struct hlist_head *head = &vcc_hash[*bucket];
85 sk = hlist_empty(head) ? NULL : __sk_head(head);
92 for (; sk; sk = sk_next(sk)) {
93 l -= compare_family(sk, family);
97 if (!sk && ++*bucket < VCC_HTABLE_SIZE) {
98 sk = sk_head(&vcc_hash[*bucket]);
107 static inline void *vcc_walk(struct vcc_state *state, loff_t l)
109 return __vcc_walk(&state->sk, state->family, &state->bucket, l) ?
113 static int __vcc_seq_open(struct inode *inode, struct file *file,
114 int family, const struct seq_operations *ops)
116 struct vcc_state *state;
117 struct seq_file *seq;
120 state = kmalloc(sizeof(*state), GFP_KERNEL);
124 rc = seq_open(file, ops);
128 state->family = family;
130 seq = file->private_data;
131 seq->private = state;
139 static int vcc_seq_release(struct inode *inode, struct file *file)
141 return seq_release_private(inode, file);
144 static void *vcc_seq_start(struct seq_file *seq, loff_t *pos)
145 __acquires(vcc_sklist_lock)
147 struct vcc_state *state = seq->private;
150 read_lock(&vcc_sklist_lock);
151 state->sk = (void *)1;
152 return left ? vcc_walk(state, left) : (void *)1;
155 static void vcc_seq_stop(struct seq_file *seq, void *v)
156 __releases(vcc_sklist_lock)
158 read_unlock(&vcc_sklist_lock);
161 static void *vcc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
163 struct vcc_state *state = seq->private;
165 v = vcc_walk(state, 1);
166 *pos += !!PTR_ERR(v);
170 static void pvc_info(struct seq_file *seq, struct atm_vcc *vcc)
172 static const char *class_name[] = { "off","UBR","CBR","VBR","ABR" };
173 static const char *aal_name[] = {
174 "---", "1", "2", "3/4", /* 0- 3 */
175 "???", "5", "???", "???", /* 4- 7 */
176 "???", "???", "???", "???", /* 8-11 */
177 "???", "0", "???", "???"}; /* 12-15 */
179 seq_printf(seq, "%3d %3d %5d %-3s %7d %-5s %7d %-6s",
180 vcc->dev->number,vcc->vpi,vcc->vci,
181 vcc->qos.aal >= ARRAY_SIZE(aal_name) ? "err" :
182 aal_name[vcc->qos.aal],vcc->qos.rxtp.min_pcr,
183 class_name[vcc->qos.rxtp.traffic_class],vcc->qos.txtp.min_pcr,
184 class_name[vcc->qos.txtp.traffic_class]);
185 if (test_bit(ATM_VF_IS_CLIP, &vcc->flags)) {
186 struct clip_vcc *clip_vcc = CLIP_VCC(vcc);
187 struct net_device *dev;
189 dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : NULL;
190 seq_printf(seq, "CLIP, Itf:%s, Encap:",
191 dev ? dev->name : "none?");
192 seq_printf(seq, "%s", clip_vcc->encap ? "LLC/SNAP" : "None");
197 static const char *vcc_state(struct atm_vcc *vcc)
199 static const char *map[] = { ATM_VS2TXT_MAP };
201 return map[ATM_VF2VS(vcc->flags)];
204 static void vcc_info(struct seq_file *seq, struct atm_vcc *vcc)
206 struct sock *sk = sk_atm(vcc);
208 seq_printf(seq, "%p ", vcc);
210 seq_printf(seq, "Unassigned ");
212 seq_printf(seq, "%3d %3d %5d ", vcc->dev->number, vcc->vpi,
214 switch (sk->sk_family) {
216 seq_printf(seq, "PVC");
219 seq_printf(seq, "SVC");
222 seq_printf(seq, "%3d", sk->sk_family);
224 seq_printf(seq, " %04lx %5d %7d/%7d %7d/%7d [%d]\n", vcc->flags, sk->sk_err,
225 atomic_read(&sk->sk_wmem_alloc), sk->sk_sndbuf,
226 atomic_read(&sk->sk_rmem_alloc), sk->sk_rcvbuf,
227 atomic_read(&sk->sk_refcnt));
230 static void svc_info(struct seq_file *seq, struct atm_vcc *vcc)
233 seq_printf(seq, sizeof(void *) == 4 ?
234 "N/A@%p%10s" : "N/A@%p%2s", vcc, "");
236 seq_printf(seq, "%3d %3d %5d ",
237 vcc->dev->number, vcc->vpi, vcc->vci);
238 seq_printf(seq, "%-10s ", vcc_state(vcc));
239 seq_printf(seq, "%s%s", vcc->remote.sas_addr.pub,
240 *vcc->remote.sas_addr.pub && *vcc->remote.sas_addr.prv ? "+" : "");
241 if (*vcc->remote.sas_addr.prv) {
244 for (i = 0; i < ATM_ESA_LEN; i++)
245 seq_printf(seq, "%02x", vcc->remote.sas_addr.prv[i]);
250 static int atm_dev_seq_show(struct seq_file *seq, void *v)
252 static char atm_dev_banner[] =
253 "Itf Type ESI/\"MAC\"addr "
254 "AAL(TX,err,RX,err,drop) ... [refcnt]\n";
257 seq_puts(seq, atm_dev_banner);
259 struct atm_dev *dev = list_entry(v, struct atm_dev, dev_list);
261 atm_dev_info(seq, dev);
266 static const struct seq_operations atm_dev_seq_ops = {
267 .start = atm_dev_seq_start,
268 .next = atm_dev_seq_next,
269 .stop = atm_dev_seq_stop,
270 .show = atm_dev_seq_show,
273 static int atm_dev_seq_open(struct inode *inode, struct file *file)
275 return seq_open(file, &atm_dev_seq_ops);
278 static const struct file_operations devices_seq_fops = {
279 .open = atm_dev_seq_open,
282 .release = seq_release,
285 static int pvc_seq_show(struct seq_file *seq, void *v)
287 static char atm_pvc_banner[] =
288 "Itf VPI VCI AAL RX(PCR,Class) TX(PCR,Class)\n";
291 seq_puts(seq, atm_pvc_banner);
293 struct vcc_state *state = seq->private;
294 struct atm_vcc *vcc = atm_sk(state->sk);
301 static const struct seq_operations pvc_seq_ops = {
302 .start = vcc_seq_start,
303 .next = vcc_seq_next,
304 .stop = vcc_seq_stop,
305 .show = pvc_seq_show,
308 static int pvc_seq_open(struct inode *inode, struct file *file)
310 return __vcc_seq_open(inode, file, PF_ATMPVC, &pvc_seq_ops);
313 static const struct file_operations pvc_seq_fops = {
314 .open = pvc_seq_open,
317 .release = vcc_seq_release,
320 static int vcc_seq_show(struct seq_file *seq, void *v)
322 if (v == (void *)1) {
323 seq_printf(seq, sizeof(void *) == 4 ? "%-8s%s" : "%-16s%s",
324 "Address ", "Itf VPI VCI Fam Flags Reply "
325 "Send buffer Recv buffer [refcnt]\n");
327 struct vcc_state *state = seq->private;
328 struct atm_vcc *vcc = atm_sk(state->sk);
335 static const struct seq_operations vcc_seq_ops = {
336 .start = vcc_seq_start,
337 .next = vcc_seq_next,
338 .stop = vcc_seq_stop,
339 .show = vcc_seq_show,
342 static int vcc_seq_open(struct inode *inode, struct file *file)
344 return __vcc_seq_open(inode, file, 0, &vcc_seq_ops);
347 static const struct file_operations vcc_seq_fops = {
348 .open = vcc_seq_open,
351 .release = vcc_seq_release,
354 static int svc_seq_show(struct seq_file *seq, void *v)
356 static char atm_svc_banner[] =
357 "Itf VPI VCI State Remote\n";
360 seq_puts(seq, atm_svc_banner);
362 struct vcc_state *state = seq->private;
363 struct atm_vcc *vcc = atm_sk(state->sk);
370 static const struct seq_operations svc_seq_ops = {
371 .start = vcc_seq_start,
372 .next = vcc_seq_next,
373 .stop = vcc_seq_stop,
374 .show = svc_seq_show,
377 static int svc_seq_open(struct inode *inode, struct file *file)
379 return __vcc_seq_open(inode, file, PF_ATMSVC, &svc_seq_ops);
382 static const struct file_operations svc_seq_fops = {
383 .open = svc_seq_open,
386 .release = vcc_seq_release,
389 static ssize_t proc_dev_atm_read(struct file *file, char __user *buf,
390 size_t count, loff_t *pos)
396 if (count == 0) return 0;
397 page = get_zeroed_page(GFP_KERNEL);
398 if (!page) return -ENOMEM;
399 dev = PDE(file->f_path.dentry->d_inode)->data;
400 if (!dev->ops->proc_read)
403 length = dev->ops->proc_read(dev,pos,(char *) page);
404 if (length > count) length = -EINVAL;
407 if (copy_to_user(buf,(char *) page,length)) length = -EFAULT;
415 struct proc_dir_entry *atm_proc_root;
416 EXPORT_SYMBOL(atm_proc_root);
419 int atm_proc_dev_register(struct atm_dev *dev)
425 if (!dev->ops->proc_read)
430 for (num = dev->number; num; num /= 10) digits++;
431 if (!digits) digits++;
433 dev->proc_name = kmalloc(strlen(dev->type) + digits + 2, GFP_KERNEL);
436 sprintf(dev->proc_name,"%s:%d",dev->type, dev->number);
438 dev->proc_entry = create_proc_entry(dev->proc_name, 0, atm_proc_root);
439 if (!dev->proc_entry)
441 dev->proc_entry->data = dev;
442 dev->proc_entry->proc_fops = &proc_atm_dev_ops;
443 dev->proc_entry->owner = THIS_MODULE;
446 kfree(dev->proc_name);
452 void atm_proc_dev_deregister(struct atm_dev *dev)
454 if (!dev->ops->proc_read)
457 remove_proc_entry(dev->proc_name, atm_proc_root);
458 kfree(dev->proc_name);
461 static struct atm_proc_entry {
463 const struct file_operations *proc_fops;
464 struct proc_dir_entry *dirent;
465 } atm_proc_ents[] = {
466 { .name = "devices", .proc_fops = &devices_seq_fops },
467 { .name = "pvc", .proc_fops = &pvc_seq_fops },
468 { .name = "svc", .proc_fops = &svc_seq_fops },
469 { .name = "vc", .proc_fops = &vcc_seq_fops },
470 { .name = NULL, .proc_fops = NULL }
473 static void atm_proc_dirs_remove(void)
475 static struct atm_proc_entry *e;
477 for (e = atm_proc_ents; e->name; e++) {
479 remove_proc_entry(e->name, atm_proc_root);
481 proc_net_remove(&init_net, "atm");
484 int __init atm_proc_init(void)
486 static struct atm_proc_entry *e;
489 atm_proc_root = proc_net_mkdir(&init_net, "atm", init_net.proc_net);
492 for (e = atm_proc_ents; e->name; e++) {
493 struct proc_dir_entry *dirent;
495 dirent = create_proc_entry(e->name, S_IRUGO, atm_proc_root);
498 dirent->proc_fops = e->proc_fops;
499 dirent->owner = THIS_MODULE;
507 atm_proc_dirs_remove();
513 void atm_proc_exit(void)
515 atm_proc_dirs_remove();