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 <linux/slab.h>
26 #include <net/net_namespace.h>
27 #include <net/atmclip.h>
28 #include <linux/uaccess.h>
29 #include <linux/param.h> /* for HZ */
30 #include <linux/atomic.h>
31 #include "resources.h"
32 #include "common.h" /* atm_proc_init prototype */
33 #include "signaling.h" /* to get sigd - ugly too */
35 static ssize_t proc_dev_atm_read(struct file *file, char __user *buf,
36 size_t count, loff_t *pos);
38 static const struct file_operations proc_atm_dev_ops = {
40 .read = proc_dev_atm_read,
41 .llseek = noop_llseek,
44 static void add_stats(struct seq_file *seq, const char *aal,
45 const struct k_atm_aal_stats *stats)
47 seq_printf(seq, "%s ( %d %d %d %d %d )", aal,
48 atomic_read(&stats->tx), atomic_read(&stats->tx_err),
49 atomic_read(&stats->rx), atomic_read(&stats->rx_err),
50 atomic_read(&stats->rx_drop));
53 static void atm_dev_info(struct seq_file *seq, const struct atm_dev *dev)
57 seq_printf(seq, "%3d %-8s", dev->number, dev->type);
58 for (i = 0; i < ESI_LEN; i++)
59 seq_printf(seq, "%02x", dev->esi[i]);
61 add_stats(seq, "0", &dev->stats.aal0);
63 add_stats(seq, "5", &dev->stats.aal5);
64 seq_printf(seq, "\t[%d]", atomic_read(&dev->refcnt));
74 static inline int compare_family(struct sock *sk, int family)
76 return !family || (sk->sk_family == family);
79 static int __vcc_walk(struct sock **sock, int family, int *bucket, loff_t l)
81 struct sock *sk = *sock;
83 if (sk == SEQ_START_TOKEN) {
84 for (*bucket = 0; *bucket < VCC_HTABLE_SIZE; ++*bucket) {
85 struct hlist_head *head = &vcc_hash[*bucket];
87 sk = hlist_empty(head) ? NULL : __sk_head(head);
94 for (; sk; sk = sk_next(sk)) {
95 l -= compare_family(sk, family);
99 if (!sk && ++*bucket < VCC_HTABLE_SIZE) {
100 sk = sk_head(&vcc_hash[*bucket]);
103 sk = SEQ_START_TOKEN;
109 static inline void *vcc_walk(struct vcc_state *state, loff_t l)
111 return __vcc_walk(&state->sk, state->family, &state->bucket, l) ?
115 static int __vcc_seq_open(struct inode *inode, struct file *file,
116 int family, const struct seq_operations *ops)
118 struct vcc_state *state;
120 state = __seq_open_private(file, ops, sizeof(*state));
124 state->family = family;
128 static void *vcc_seq_start(struct seq_file *seq, loff_t *pos)
129 __acquires(vcc_sklist_lock)
131 struct vcc_state *state = seq->private;
134 read_lock(&vcc_sklist_lock);
135 state->sk = SEQ_START_TOKEN;
136 return left ? vcc_walk(state, left) : SEQ_START_TOKEN;
139 static void vcc_seq_stop(struct seq_file *seq, void *v)
140 __releases(vcc_sklist_lock)
142 read_unlock(&vcc_sklist_lock);
145 static void *vcc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
147 struct vcc_state *state = seq->private;
149 v = vcc_walk(state, 1);
150 *pos += !!PTR_ERR(v);
154 static void pvc_info(struct seq_file *seq, struct atm_vcc *vcc)
156 static const char *const class_name[] = {
157 "off", "UBR", "CBR", "VBR", "ABR"};
158 static const char *const aal_name[] = {
159 "---", "1", "2", "3/4", /* 0- 3 */
160 "???", "5", "???", "???", /* 4- 7 */
161 "???", "???", "???", "???", /* 8-11 */
162 "???", "0", "???", "???"}; /* 12-15 */
164 seq_printf(seq, "%3d %3d %5d %-3s %7d %-5s %7d %-6s",
165 vcc->dev->number, vcc->vpi, vcc->vci,
166 vcc->qos.aal >= ARRAY_SIZE(aal_name) ? "err" :
167 aal_name[vcc->qos.aal], vcc->qos.rxtp.min_pcr,
168 class_name[vcc->qos.rxtp.traffic_class],
169 vcc->qos.txtp.min_pcr,
170 class_name[vcc->qos.txtp.traffic_class]);
171 if (test_bit(ATM_VF_IS_CLIP, &vcc->flags)) {
172 struct clip_vcc *clip_vcc = CLIP_VCC(vcc);
173 struct net_device *dev;
175 dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : NULL;
176 seq_printf(seq, "CLIP, Itf:%s, Encap:",
177 dev ? dev->name : "none?");
178 seq_printf(seq, "%s", clip_vcc->encap ? "LLC/SNAP" : "None");
183 static const char *vcc_state(struct atm_vcc *vcc)
185 static const char *const map[] = { ATM_VS2TXT_MAP };
187 return map[ATM_VF2VS(vcc->flags)];
190 static void vcc_info(struct seq_file *seq, struct atm_vcc *vcc)
192 struct sock *sk = sk_atm(vcc);
194 seq_printf(seq, "%pK ", vcc);
196 seq_printf(seq, "Unassigned ");
198 seq_printf(seq, "%3d %3d %5d ", vcc->dev->number, vcc->vpi,
200 switch (sk->sk_family) {
202 seq_printf(seq, "PVC");
205 seq_printf(seq, "SVC");
208 seq_printf(seq, "%3d", sk->sk_family);
210 seq_printf(seq, " %04lx %5d %7d/%7d %7d/%7d [%d]\n",
211 vcc->flags, sk->sk_err,
212 sk_wmem_alloc_get(sk), sk->sk_sndbuf,
213 sk_rmem_alloc_get(sk), sk->sk_rcvbuf,
214 atomic_read(&sk->sk_refcnt));
217 static void svc_info(struct seq_file *seq, struct atm_vcc *vcc)
220 seq_printf(seq, sizeof(void *) == 4 ?
221 "N/A@%pK%10s" : "N/A@%pK%2s", vcc, "");
223 seq_printf(seq, "%3d %3d %5d ",
224 vcc->dev->number, vcc->vpi, vcc->vci);
225 seq_printf(seq, "%-10s ", vcc_state(vcc));
226 seq_printf(seq, "%s%s", vcc->remote.sas_addr.pub,
227 *vcc->remote.sas_addr.pub && *vcc->remote.sas_addr.prv ? "+" : "");
228 if (*vcc->remote.sas_addr.prv) {
231 for (i = 0; i < ATM_ESA_LEN; i++)
232 seq_printf(seq, "%02x", vcc->remote.sas_addr.prv[i]);
237 static int atm_dev_seq_show(struct seq_file *seq, void *v)
239 static char atm_dev_banner[] =
240 "Itf Type ESI/\"MAC\"addr "
241 "AAL(TX,err,RX,err,drop) ... [refcnt]\n";
244 seq_puts(seq, atm_dev_banner);
246 struct atm_dev *dev = list_entry(v, struct atm_dev, dev_list);
248 atm_dev_info(seq, dev);
253 static const struct seq_operations atm_dev_seq_ops = {
254 .start = atm_dev_seq_start,
255 .next = atm_dev_seq_next,
256 .stop = atm_dev_seq_stop,
257 .show = atm_dev_seq_show,
260 static int atm_dev_seq_open(struct inode *inode, struct file *file)
262 return seq_open(file, &atm_dev_seq_ops);
265 static const struct file_operations devices_seq_fops = {
266 .open = atm_dev_seq_open,
269 .release = seq_release,
272 static int pvc_seq_show(struct seq_file *seq, void *v)
274 static char atm_pvc_banner[] =
275 "Itf VPI VCI AAL RX(PCR,Class) TX(PCR,Class)\n";
277 if (v == SEQ_START_TOKEN)
278 seq_puts(seq, atm_pvc_banner);
280 struct vcc_state *state = seq->private;
281 struct atm_vcc *vcc = atm_sk(state->sk);
288 static const struct seq_operations pvc_seq_ops = {
289 .start = vcc_seq_start,
290 .next = vcc_seq_next,
291 .stop = vcc_seq_stop,
292 .show = pvc_seq_show,
295 static int pvc_seq_open(struct inode *inode, struct file *file)
297 return __vcc_seq_open(inode, file, PF_ATMPVC, &pvc_seq_ops);
300 static const struct file_operations pvc_seq_fops = {
301 .open = pvc_seq_open,
304 .release = seq_release_private,
307 static int vcc_seq_show(struct seq_file *seq, void *v)
309 if (v == SEQ_START_TOKEN) {
310 seq_printf(seq, sizeof(void *) == 4 ? "%-8s%s" : "%-16s%s",
311 "Address ", "Itf VPI VCI Fam Flags Reply "
312 "Send buffer Recv buffer [refcnt]\n");
314 struct vcc_state *state = seq->private;
315 struct atm_vcc *vcc = atm_sk(state->sk);
322 static const struct seq_operations vcc_seq_ops = {
323 .start = vcc_seq_start,
324 .next = vcc_seq_next,
325 .stop = vcc_seq_stop,
326 .show = vcc_seq_show,
329 static int vcc_seq_open(struct inode *inode, struct file *file)
331 return __vcc_seq_open(inode, file, 0, &vcc_seq_ops);
334 static const struct file_operations vcc_seq_fops = {
335 .open = vcc_seq_open,
338 .release = seq_release_private,
341 static int svc_seq_show(struct seq_file *seq, void *v)
343 static const char atm_svc_banner[] =
344 "Itf VPI VCI State Remote\n";
346 if (v == SEQ_START_TOKEN)
347 seq_puts(seq, atm_svc_banner);
349 struct vcc_state *state = seq->private;
350 struct atm_vcc *vcc = atm_sk(state->sk);
357 static const struct seq_operations svc_seq_ops = {
358 .start = vcc_seq_start,
359 .next = vcc_seq_next,
360 .stop = vcc_seq_stop,
361 .show = svc_seq_show,
364 static int svc_seq_open(struct inode *inode, struct file *file)
366 return __vcc_seq_open(inode, file, PF_ATMSVC, &svc_seq_ops);
369 static const struct file_operations svc_seq_fops = {
370 .open = svc_seq_open,
373 .release = seq_release_private,
376 static ssize_t proc_dev_atm_read(struct file *file, char __user *buf,
377 size_t count, loff_t *pos)
385 page = get_zeroed_page(GFP_KERNEL);
388 dev = PDE(file->f_path.dentry->d_inode)->data;
389 if (!dev->ops->proc_read)
392 length = dev->ops->proc_read(dev, pos, (char *)page);
397 if (copy_to_user(buf, (char *)page, length))
405 struct proc_dir_entry *atm_proc_root;
406 EXPORT_SYMBOL(atm_proc_root);
409 int atm_proc_dev_register(struct atm_dev *dev)
414 if (!dev->ops->proc_read)
418 dev->proc_name = kasprintf(GFP_KERNEL, "%s:%d", dev->type, dev->number);
422 dev->proc_entry = proc_create_data(dev->proc_name, 0, atm_proc_root,
423 &proc_atm_dev_ops, dev);
424 if (!dev->proc_entry)
429 kfree(dev->proc_name);
434 void atm_proc_dev_deregister(struct atm_dev *dev)
436 if (!dev->ops->proc_read)
439 remove_proc_entry(dev->proc_name, atm_proc_root);
440 kfree(dev->proc_name);
443 static struct atm_proc_entry {
445 const struct file_operations *proc_fops;
446 struct proc_dir_entry *dirent;
447 } atm_proc_ents[] = {
448 { .name = "devices", .proc_fops = &devices_seq_fops },
449 { .name = "pvc", .proc_fops = &pvc_seq_fops },
450 { .name = "svc", .proc_fops = &svc_seq_fops },
451 { .name = "vc", .proc_fops = &vcc_seq_fops },
452 { .name = NULL, .proc_fops = NULL }
455 static void atm_proc_dirs_remove(void)
457 static struct atm_proc_entry *e;
459 for (e = atm_proc_ents; e->name; e++) {
461 remove_proc_entry(e->name, atm_proc_root);
463 proc_net_remove(&init_net, "atm");
466 int __init atm_proc_init(void)
468 static struct atm_proc_entry *e;
471 atm_proc_root = proc_net_mkdir(&init_net, "atm", init_net.proc_net);
474 for (e = atm_proc_ents; e->name; e++) {
475 struct proc_dir_entry *dirent;
477 dirent = proc_create(e->name, S_IRUGO,
478 atm_proc_root, e->proc_fops);
488 atm_proc_dirs_remove();
494 void atm_proc_exit(void)
496 atm_proc_dirs_remove();