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 == SEQ_START_TOKEN) {
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]);
101 sk = SEQ_START_TOKEN;
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;
118 state = __seq_open_private(file, ops, sizeof(*state));
122 state->family = family;
126 static void *vcc_seq_start(struct seq_file *seq, loff_t *pos)
127 __acquires(vcc_sklist_lock)
129 struct vcc_state *state = seq->private;
132 read_lock(&vcc_sklist_lock);
133 state->sk = SEQ_START_TOKEN;
134 return left ? vcc_walk(state, left) : SEQ_START_TOKEN;
137 static void vcc_seq_stop(struct seq_file *seq, void *v)
138 __releases(vcc_sklist_lock)
140 read_unlock(&vcc_sklist_lock);
143 static void *vcc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
145 struct vcc_state *state = seq->private;
147 v = vcc_walk(state, 1);
148 *pos += !!PTR_ERR(v);
152 static void pvc_info(struct seq_file *seq, struct atm_vcc *vcc)
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 */
161 seq_printf(seq, "%3d %3d %5d %-3s %7d %-5s %7d %-6s",
162 vcc->dev->number,vcc->vpi,vcc->vci,
163 vcc->qos.aal >= ARRAY_SIZE(aal_name) ? "err" :
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;
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");
179 static const char *vcc_state(struct atm_vcc *vcc)
181 static const char *map[] = { ATM_VS2TXT_MAP };
183 return map[ATM_VF2VS(vcc->flags)];
186 static void vcc_info(struct seq_file *seq, struct atm_vcc *vcc)
188 struct sock *sk = sk_atm(vcc);
190 seq_printf(seq, "%p ", vcc);
192 seq_printf(seq, "Unassigned ");
194 seq_printf(seq, "%3d %3d %5d ", vcc->dev->number, vcc->vpi,
196 switch (sk->sk_family) {
198 seq_printf(seq, "PVC");
201 seq_printf(seq, "SVC");
204 seq_printf(seq, "%3d", sk->sk_family);
206 seq_printf(seq, " %04lx %5d %7d/%7d %7d/%7d [%d]\n", vcc->flags, sk->sk_err,
207 sk_wmem_alloc_get(sk), sk->sk_sndbuf,
208 sk_rmem_alloc_get(sk), sk->sk_rcvbuf,
209 atomic_read(&sk->sk_refcnt));
212 static void svc_info(struct seq_file *seq, struct atm_vcc *vcc)
215 seq_printf(seq, sizeof(void *) == 4 ?
216 "N/A@%p%10s" : "N/A@%p%2s", vcc, "");
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) {
226 for (i = 0; i < ATM_ESA_LEN; i++)
227 seq_printf(seq, "%02x", vcc->remote.sas_addr.prv[i]);
232 static int atm_dev_seq_show(struct seq_file *seq, void *v)
234 static char atm_dev_banner[] =
235 "Itf Type ESI/\"MAC\"addr "
236 "AAL(TX,err,RX,err,drop) ... [refcnt]\n";
238 if (v == SEQ_START_TOKEN)
239 seq_puts(seq, atm_dev_banner);
241 struct atm_dev *dev = list_entry(v, struct atm_dev, dev_list);
243 atm_dev_info(seq, dev);
248 static const struct seq_operations atm_dev_seq_ops = {
249 .start = atm_dev_seq_start,
250 .next = atm_dev_seq_next,
251 .stop = atm_dev_seq_stop,
252 .show = atm_dev_seq_show,
255 static int atm_dev_seq_open(struct inode *inode, struct file *file)
257 return seq_open(file, &atm_dev_seq_ops);
260 static const struct file_operations devices_seq_fops = {
261 .open = atm_dev_seq_open,
264 .release = seq_release,
267 static int pvc_seq_show(struct seq_file *seq, void *v)
269 static char atm_pvc_banner[] =
270 "Itf VPI VCI AAL RX(PCR,Class) TX(PCR,Class)\n";
272 if (v == SEQ_START_TOKEN)
273 seq_puts(seq, atm_pvc_banner);
275 struct vcc_state *state = seq->private;
276 struct atm_vcc *vcc = atm_sk(state->sk);
283 static const struct seq_operations pvc_seq_ops = {
284 .start = vcc_seq_start,
285 .next = vcc_seq_next,
286 .stop = vcc_seq_stop,
287 .show = pvc_seq_show,
290 static int pvc_seq_open(struct inode *inode, struct file *file)
292 return __vcc_seq_open(inode, file, PF_ATMPVC, &pvc_seq_ops);
295 static const struct file_operations pvc_seq_fops = {
296 .open = pvc_seq_open,
299 .release = seq_release_private,
302 static int vcc_seq_show(struct seq_file *seq, void *v)
304 if (v == SEQ_START_TOKEN) {
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");
309 struct vcc_state *state = seq->private;
310 struct atm_vcc *vcc = atm_sk(state->sk);
317 static const struct seq_operations vcc_seq_ops = {
318 .start = vcc_seq_start,
319 .next = vcc_seq_next,
320 .stop = vcc_seq_stop,
321 .show = vcc_seq_show,
324 static int vcc_seq_open(struct inode *inode, struct file *file)
326 return __vcc_seq_open(inode, file, 0, &vcc_seq_ops);
329 static const struct file_operations vcc_seq_fops = {
330 .open = vcc_seq_open,
333 .release = seq_release_private,
336 static int svc_seq_show(struct seq_file *seq, void *v)
338 static char atm_svc_banner[] =
339 "Itf VPI VCI State Remote\n";
341 if (v == SEQ_START_TOKEN)
342 seq_puts(seq, atm_svc_banner);
344 struct vcc_state *state = seq->private;
345 struct atm_vcc *vcc = atm_sk(state->sk);
352 static const struct seq_operations svc_seq_ops = {
353 .start = vcc_seq_start,
354 .next = vcc_seq_next,
355 .stop = vcc_seq_stop,
356 .show = svc_seq_show,
359 static int svc_seq_open(struct inode *inode, struct file *file)
361 return __vcc_seq_open(inode, file, PF_ATMSVC, &svc_seq_ops);
364 static const struct file_operations svc_seq_fops = {
365 .open = svc_seq_open,
368 .release = seq_release_private,
371 static ssize_t proc_dev_atm_read(struct file *file, char __user *buf,
372 size_t count, loff_t *pos)
378 if (count == 0) return 0;
379 page = get_zeroed_page(GFP_KERNEL);
380 if (!page) return -ENOMEM;
381 dev = PDE(file->f_path.dentry->d_inode)->data;
382 if (!dev->ops->proc_read)
385 length = dev->ops->proc_read(dev,pos,(char *) page);
386 if (length > count) length = -EINVAL;
389 if (copy_to_user(buf,(char *) page,length)) length = -EFAULT;
397 struct proc_dir_entry *atm_proc_root;
398 EXPORT_SYMBOL(atm_proc_root);
401 int atm_proc_dev_register(struct atm_dev *dev)
407 if (!dev->ops->proc_read)
412 for (num = dev->number; num; num /= 10) digits++;
413 if (!digits) digits++;
415 dev->proc_name = kmalloc(strlen(dev->type) + digits + 2, GFP_KERNEL);
418 sprintf(dev->proc_name,"%s:%d",dev->type, dev->number);
420 dev->proc_entry = proc_create_data(dev->proc_name, 0, atm_proc_root,
421 &proc_atm_dev_ops, dev);
422 if (!dev->proc_entry)
426 kfree(dev->proc_name);
432 void atm_proc_dev_deregister(struct atm_dev *dev)
434 if (!dev->ops->proc_read)
437 remove_proc_entry(dev->proc_name, atm_proc_root);
438 kfree(dev->proc_name);
441 static struct atm_proc_entry {
443 const struct file_operations *proc_fops;
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 }
453 static void atm_proc_dirs_remove(void)
455 static struct atm_proc_entry *e;
457 for (e = atm_proc_ents; e->name; e++) {
459 remove_proc_entry(e->name, atm_proc_root);
461 proc_net_remove(&init_net, "atm");
464 int __init atm_proc_init(void)
466 static struct atm_proc_entry *e;
469 atm_proc_root = proc_net_mkdir(&init_net, "atm", init_net.proc_net);
472 for (e = atm_proc_ents; e->name; e++) {
473 struct proc_dir_entry *dirent;
475 dirent = proc_create(e->name, S_IRUGO,
476 atm_proc_root, e->proc_fops);
486 atm_proc_dirs_remove();
492 void atm_proc_exit(void)
494 atm_proc_dirs_remove();