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/config.h>
12 #include <linux/module.h> /* for EXPORT_SYMBOL */
13 #include <linux/string.h>
14 #include <linux/types.h>
17 #include <linux/stat.h>
18 #include <linux/proc_fs.h>
19 #include <linux/seq_file.h>
20 #include <linux/errno.h>
21 #include <linux/atm.h>
22 #include <linux/atmdev.h>
23 #include <linux/netdevice.h>
24 #include <linux/atmclip.h>
25 #include <linux/init.h> /* for __init */
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 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, 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)
146 struct vcc_state *state = seq->private;
149 read_lock(&vcc_sklist_lock);
150 state->sk = (void *)1;
151 return left ? vcc_walk(state, left) : (void *)1;
154 static void vcc_seq_stop(struct seq_file *seq, void *v)
156 read_unlock(&vcc_sklist_lock);
159 static void *vcc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
161 struct vcc_state *state = seq->private;
163 v = vcc_walk(state, 1);
164 *pos += !!PTR_ERR(v);
168 static void pvc_info(struct seq_file *seq, struct atm_vcc *vcc)
170 static const char *class_name[] = { "off","UBR","CBR","VBR","ABR" };
171 static const char *aal_name[] = {
172 "---", "1", "2", "3/4", /* 0- 3 */
173 "???", "5", "???", "???", /* 4- 7 */
174 "???", "???", "???", "???", /* 8-11 */
175 "???", "0", "???", "???"}; /* 12-15 */
177 seq_printf(seq, "%3d %3d %5d %-3s %7d %-5s %7d %-6s",
178 vcc->dev->number,vcc->vpi,vcc->vci,
179 vcc->qos.aal >= sizeof(aal_name)/sizeof(aal_name[0]) ? "err" :
180 aal_name[vcc->qos.aal],vcc->qos.rxtp.min_pcr,
181 class_name[vcc->qos.rxtp.traffic_class],vcc->qos.txtp.min_pcr,
182 class_name[vcc->qos.txtp.traffic_class]);
183 if (test_bit(ATM_VF_IS_CLIP, &vcc->flags)) {
184 struct clip_vcc *clip_vcc = CLIP_VCC(vcc);
185 struct net_device *dev;
187 dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : NULL;
188 seq_printf(seq, "CLIP, Itf:%s, Encap:",
189 dev ? dev->name : "none?");
190 seq_printf(seq, "%s", clip_vcc->encap ? "LLC/SNAP" : "None");
195 static const char *vcc_state(struct atm_vcc *vcc)
197 static const char *map[] = { ATM_VS2TXT_MAP };
199 return map[ATM_VF2VS(vcc->flags)];
202 static void vcc_info(struct seq_file *seq, struct atm_vcc *vcc)
204 struct sock *sk = sk_atm(vcc);
206 seq_printf(seq, "%p ", vcc);
208 seq_printf(seq, "Unassigned ");
210 seq_printf(seq, "%3d %3d %5d ", vcc->dev->number, vcc->vpi,
212 switch (sk->sk_family) {
214 seq_printf(seq, "PVC");
217 seq_printf(seq, "SVC");
220 seq_printf(seq, "%3d", sk->sk_family);
222 seq_printf(seq, " %04lx %5d %7d/%7d %7d/%7d [%d]\n", vcc->flags, sk->sk_err,
223 atomic_read(&sk->sk_wmem_alloc), sk->sk_sndbuf,
224 atomic_read(&sk->sk_rmem_alloc), sk->sk_rcvbuf,
225 atomic_read(&sk->sk_refcnt));
228 static void svc_info(struct seq_file *seq, struct atm_vcc *vcc)
231 seq_printf(seq, sizeof(void *) == 4 ?
232 "N/A@%p%10s" : "N/A@%p%2s", vcc, "");
234 seq_printf(seq, "%3d %3d %5d ",
235 vcc->dev->number, vcc->vpi, vcc->vci);
236 seq_printf(seq, "%-10s ", vcc_state(vcc));
237 seq_printf(seq, "%s%s", vcc->remote.sas_addr.pub,
238 *vcc->remote.sas_addr.pub && *vcc->remote.sas_addr.prv ? "+" : "");
239 if (*vcc->remote.sas_addr.prv) {
242 for (i = 0; i < ATM_ESA_LEN; i++)
243 seq_printf(seq, "%02x", vcc->remote.sas_addr.prv[i]);
248 static int atm_dev_seq_show(struct seq_file *seq, void *v)
250 static char atm_dev_banner[] =
251 "Itf Type ESI/\"MAC\"addr "
252 "AAL(TX,err,RX,err,drop) ... [refcnt]\n";
255 seq_puts(seq, atm_dev_banner);
257 struct atm_dev *dev = list_entry(v, struct atm_dev, dev_list);
259 atm_dev_info(seq, dev);
264 static struct seq_operations atm_dev_seq_ops = {
265 .start = atm_dev_seq_start,
266 .next = atm_dev_seq_next,
267 .stop = atm_dev_seq_stop,
268 .show = atm_dev_seq_show,
271 static int atm_dev_seq_open(struct inode *inode, struct file *file)
273 return seq_open(file, &atm_dev_seq_ops);
276 static struct file_operations devices_seq_fops = {
277 .open = atm_dev_seq_open,
280 .release = seq_release,
283 static int pvc_seq_show(struct seq_file *seq, void *v)
285 static char atm_pvc_banner[] =
286 "Itf VPI VCI AAL RX(PCR,Class) TX(PCR,Class)\n";
289 seq_puts(seq, atm_pvc_banner);
291 struct vcc_state *state = seq->private;
292 struct atm_vcc *vcc = atm_sk(state->sk);
299 static struct seq_operations pvc_seq_ops = {
300 .start = vcc_seq_start,
301 .next = vcc_seq_next,
302 .stop = vcc_seq_stop,
303 .show = pvc_seq_show,
306 static int pvc_seq_open(struct inode *inode, struct file *file)
308 return __vcc_seq_open(inode, file, PF_ATMPVC, &pvc_seq_ops);
311 static struct file_operations pvc_seq_fops = {
312 .open = pvc_seq_open,
315 .release = vcc_seq_release,
318 static int vcc_seq_show(struct seq_file *seq, void *v)
320 if (v == (void *)1) {
321 seq_printf(seq, sizeof(void *) == 4 ? "%-8s%s" : "%-16s%s",
322 "Address ", "Itf VPI VCI Fam Flags Reply "
323 "Send buffer Recv buffer [refcnt]\n");
325 struct vcc_state *state = seq->private;
326 struct atm_vcc *vcc = atm_sk(state->sk);
333 static struct seq_operations vcc_seq_ops = {
334 .start = vcc_seq_start,
335 .next = vcc_seq_next,
336 .stop = vcc_seq_stop,
337 .show = vcc_seq_show,
340 static int vcc_seq_open(struct inode *inode, struct file *file)
342 return __vcc_seq_open(inode, file, 0, &vcc_seq_ops);
345 static struct file_operations vcc_seq_fops = {
346 .open = vcc_seq_open,
349 .release = vcc_seq_release,
352 static int svc_seq_show(struct seq_file *seq, void *v)
354 static char atm_svc_banner[] =
355 "Itf VPI VCI State Remote\n";
358 seq_puts(seq, atm_svc_banner);
360 struct vcc_state *state = seq->private;
361 struct atm_vcc *vcc = atm_sk(state->sk);
368 static struct seq_operations svc_seq_ops = {
369 .start = vcc_seq_start,
370 .next = vcc_seq_next,
371 .stop = vcc_seq_stop,
372 .show = svc_seq_show,
375 static int svc_seq_open(struct inode *inode, struct file *file)
377 return __vcc_seq_open(inode, file, PF_ATMSVC, &svc_seq_ops);
380 static struct file_operations svc_seq_fops = {
381 .open = svc_seq_open,
384 .release = vcc_seq_release,
387 static ssize_t proc_dev_atm_read(struct file *file, char __user *buf,
388 size_t count, loff_t *pos)
394 if (count == 0) return 0;
395 page = get_zeroed_page(GFP_KERNEL);
396 if (!page) return -ENOMEM;
397 dev = PDE(file->f_dentry->d_inode)->data;
398 if (!dev->ops->proc_read)
401 length = dev->ops->proc_read(dev,pos,(char *) page);
402 if (length > count) length = -EINVAL;
405 if (copy_to_user(buf,(char *) page,length)) length = -EFAULT;
413 struct proc_dir_entry *atm_proc_root;
414 EXPORT_SYMBOL(atm_proc_root);
417 int atm_proc_dev_register(struct atm_dev *dev)
423 if (!dev->ops->proc_read)
428 for (num = dev->number; num; num /= 10) digits++;
429 if (!digits) digits++;
431 dev->proc_name = kmalloc(strlen(dev->type) + digits + 2, GFP_KERNEL);
434 sprintf(dev->proc_name,"%s:%d",dev->type, dev->number);
436 dev->proc_entry = create_proc_entry(dev->proc_name, 0, atm_proc_root);
437 if (!dev->proc_entry)
439 dev->proc_entry->data = dev;
440 dev->proc_entry->proc_fops = &proc_atm_dev_ops;
441 dev->proc_entry->owner = THIS_MODULE;
444 kfree(dev->proc_name);
450 void atm_proc_dev_deregister(struct atm_dev *dev)
452 if (!dev->ops->proc_read)
455 remove_proc_entry(dev->proc_name, atm_proc_root);
456 kfree(dev->proc_name);
459 static struct atm_proc_entry {
461 struct file_operations *proc_fops;
462 struct proc_dir_entry *dirent;
463 } atm_proc_ents[] = {
464 { .name = "devices", .proc_fops = &devices_seq_fops },
465 { .name = "pvc", .proc_fops = &pvc_seq_fops },
466 { .name = "svc", .proc_fops = &svc_seq_fops },
467 { .name = "vc", .proc_fops = &vcc_seq_fops },
468 { .name = NULL, .proc_fops = NULL }
471 static void atm_proc_dirs_remove(void)
473 static struct atm_proc_entry *e;
475 for (e = atm_proc_ents; e->name; e++) {
477 remove_proc_entry(e->name, atm_proc_root);
479 remove_proc_entry("net/atm", NULL);
482 int __init atm_proc_init(void)
484 static struct atm_proc_entry *e;
487 atm_proc_root = proc_mkdir("net/atm",NULL);
490 for (e = atm_proc_ents; e->name; e++) {
491 struct proc_dir_entry *dirent;
493 dirent = create_proc_entry(e->name, S_IRUGO, atm_proc_root);
496 dirent->proc_fops = e->proc_fops;
497 dirent->owner = THIS_MODULE;
505 atm_proc_dirs_remove();
511 void __exit atm_proc_exit(void)
513 atm_proc_dirs_remove();