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DEFINITIONS
This source file includes following definitions.
- add_stats
- atm_dev_info
- compare_family
- __vcc_walk
- vcc_walk
- __vcc_seq_open
- vcc_seq_start
- vcc_seq_stop
- vcc_seq_next
- pvc_info
- vcc_state
- vcc_info
- svc_info
- atm_dev_seq_show
- atm_dev_seq_open
- pvc_seq_show
- pvc_seq_open
- vcc_seq_show
- vcc_seq_open
- svc_seq_show
- svc_seq_open
- proc_dev_atm_read
- atm_proc_dev_register
- atm_proc_dev_deregister
- atm_proc_dirs_remove
- atm_proc_init
- atm_proc_exit
/* net/atm/proc.c - ATM /proc interface
*
* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA
*
* seq_file api usage by romieu@fr.zoreil.com
*
* Evaluating the efficiency of the whole thing if left as an exercise to
* the reader.
*/
#include <linux/module.h> /* for EXPORT_SYMBOL */
#include <linux/string.h>
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/fs.h>
#include <linux/stat.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/errno.h>
#include <linux/atm.h>
#include <linux/atmdev.h>
#include <linux/netdevice.h>
#include <linux/atmclip.h>
#include <linux/init.h> /* for __init */
#include <net/net_namespace.h>
#include <net/atmclip.h>
#include <asm/uaccess.h>
#include <asm/atomic.h>
#include <asm/param.h> /* for HZ */
#include "resources.h"
#include "common.h" /* atm_proc_init prototype */
#include "signaling.h" /* to get sigd - ugly too */
static ssize_t proc_dev_atm_read(struct file *file,char __user *buf,size_t count,
loff_t *pos);
static const struct file_operations proc_atm_dev_ops = {
.owner = THIS_MODULE,
.read = proc_dev_atm_read,
};
static void add_stats(struct seq_file *seq, const char *aal,
const struct k_atm_aal_stats *stats)
{
seq_printf(seq, "%s ( %d %d %d %d %d )", aal,
atomic_read(&stats->tx),atomic_read(&stats->tx_err),
atomic_read(&stats->rx),atomic_read(&stats->rx_err),
atomic_read(&stats->rx_drop));
}
static void atm_dev_info(struct seq_file *seq, const struct atm_dev *dev)
{
int i;
seq_printf(seq, "%3d %-8s", dev->number, dev->type);
for (i = 0; i < ESI_LEN; i++)
seq_printf(seq, "%02x", dev->esi[i]);
seq_puts(seq, " ");
add_stats(seq, "0", &dev->stats.aal0);
seq_puts(seq, " ");
add_stats(seq, "5", &dev->stats.aal5);
seq_printf(seq, "\t[%d]", atomic_read(&dev->refcnt));
seq_putc(seq, '\n');
}
struct vcc_state {
int bucket;
struct sock *sk;
int family;
};
static inline int compare_family(struct sock *sk, int family)
{
return !family || (sk->sk_family == family);
}
static int __vcc_walk(struct sock **sock, int family, int *bucket, loff_t l)
{
struct sock *sk = *sock;
if (sk == SEQ_START_TOKEN) {
for (*bucket = 0; *bucket < VCC_HTABLE_SIZE; ++*bucket) {
struct hlist_head *head = &vcc_hash[*bucket];
sk = hlist_empty(head) ? NULL : __sk_head(head);
if (sk)
break;
}
l--;
}
try_again:
for (; sk; sk = sk_next(sk)) {
l -= compare_family(sk, family);
if (l < 0)
goto out;
}
if (!sk && ++*bucket < VCC_HTABLE_SIZE) {
sk = sk_head(&vcc_hash[*bucket]);
goto try_again;
}
sk = SEQ_START_TOKEN;
out:
*sock = sk;
return (l < 0);
}
static inline void *vcc_walk(struct vcc_state *state, loff_t l)
{
return __vcc_walk(&state->sk, state->family, &state->bucket, l) ?
state : NULL;
}
static int __vcc_seq_open(struct inode *inode, struct file *file,
int family, const struct seq_operations *ops)
{
struct vcc_state *state;
state = __seq_open_private(file, ops, sizeof(*state));
if (state == NULL)
return -ENOMEM;
state->family = family;
return 0;
}
static void *vcc_seq_start(struct seq_file *seq, loff_t *pos)
__acquires(vcc_sklist_lock)
{
struct vcc_state *state = seq->private;
loff_t left = *pos;
read_lock(&vcc_sklist_lock);
state->sk = SEQ_START_TOKEN;
return left ? vcc_walk(state, left) : SEQ_START_TOKEN;
}
static void vcc_seq_stop(struct seq_file *seq, void *v)
__releases(vcc_sklist_lock)
{
read_unlock(&vcc_sklist_lock);
}
static void *vcc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
struct vcc_state *state = seq->private;
v = vcc_walk(state, 1);
*pos += !!PTR_ERR(v);
return v;
}
static void pvc_info(struct seq_file *seq, struct atm_vcc *vcc)
{
static const char *class_name[] = { "off","UBR","CBR","VBR","ABR" };
static const char *aal_name[] = {
"---", "1", "2", "3/4", /* 0- 3 */
"???", "5", "???", "???", /* 4- 7 */
"???", "???", "???", "???", /* 8-11 */
"???", "0", "???", "???"}; /* 12-15 */
seq_printf(seq, "%3d %3d %5d %-3s %7d %-5s %7d %-6s",
vcc->dev->number,vcc->vpi,vcc->vci,
vcc->qos.aal >= ARRAY_SIZE(aal_name) ? "err" :
aal_name[vcc->qos.aal],vcc->qos.rxtp.min_pcr,
class_name[vcc->qos.rxtp.traffic_class],vcc->qos.txtp.min_pcr,
class_name[vcc->qos.txtp.traffic_class]);
if (test_bit(ATM_VF_IS_CLIP, &vcc->flags)) {
struct clip_vcc *clip_vcc = CLIP_VCC(vcc);
struct net_device *dev;
dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : NULL;
seq_printf(seq, "CLIP, Itf:%s, Encap:",
dev ? dev->name : "none?");
seq_printf(seq, "%s", clip_vcc->encap ? "LLC/SNAP" : "None");
}
seq_putc(seq, '\n');
}
static const char *vcc_state(struct atm_vcc *vcc)
{
static const char *map[] = { ATM_VS2TXT_MAP };
return map[ATM_VF2VS(vcc->flags)];
}
static void vcc_info(struct seq_file *seq, struct atm_vcc *vcc)
{
struct sock *sk = sk_atm(vcc);
seq_printf(seq, "%p ", vcc);
if (!vcc->dev)
seq_printf(seq, "Unassigned ");
else
seq_printf(seq, "%3d %3d %5d ", vcc->dev->number, vcc->vpi,
vcc->vci);
switch (sk->sk_family) {
case AF_ATMPVC:
seq_printf(seq, "PVC");
break;
case AF_ATMSVC:
seq_printf(seq, "SVC");
break;
default:
seq_printf(seq, "%3d", sk->sk_family);
}
seq_printf(seq, " %04lx %5d %7d/%7d %7d/%7d [%d]\n", vcc->flags, sk->sk_err,
atomic_read(&sk->sk_wmem_alloc), sk->sk_sndbuf,
atomic_read(&sk->sk_rmem_alloc), sk->sk_rcvbuf,
atomic_read(&sk->sk_refcnt));
}
static void svc_info(struct seq_file *seq, struct atm_vcc *vcc)
{
if (!vcc->dev)
seq_printf(seq, sizeof(void *) == 4 ?
"N/A@%p%10s" : "N/A@%p%2s", vcc, "");
else
seq_printf(seq, "%3d %3d %5d ",
vcc->dev->number, vcc->vpi, vcc->vci);
seq_printf(seq, "%-10s ", vcc_state(vcc));
seq_printf(seq, "%s%s", vcc->remote.sas_addr.pub,
*vcc->remote.sas_addr.pub && *vcc->remote.sas_addr.prv ? "+" : "");
if (*vcc->remote.sas_addr.prv) {
int i;
for (i = 0; i < ATM_ESA_LEN; i++)
seq_printf(seq, "%02x", vcc->remote.sas_addr.prv[i]);
}
seq_putc(seq, '\n');
}
static int atm_dev_seq_show(struct seq_file *seq, void *v)
{
static char atm_dev_banner[] =
"Itf Type ESI/\"MAC\"addr "
"AAL(TX,err,RX,err,drop) ... [refcnt]\n";
if (v == SEQ_START_TOKEN)
seq_puts(seq, atm_dev_banner);
else {
struct atm_dev *dev = list_entry(v, struct atm_dev, dev_list);
atm_dev_info(seq, dev);
}
return 0;
}
static const struct seq_operations atm_dev_seq_ops = {
.start = atm_dev_seq_start,
.next = atm_dev_seq_next,
.stop = atm_dev_seq_stop,
.show = atm_dev_seq_show,
};
static int atm_dev_seq_open(struct inode *inode, struct file *file)
{
return seq_open(file, &atm_dev_seq_ops);
}
static const struct file_operations devices_seq_fops = {
.open = atm_dev_seq_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
static int pvc_seq_show(struct seq_file *seq, void *v)
{
static char atm_pvc_banner[] =
"Itf VPI VCI AAL RX(PCR,Class) TX(PCR,Class)\n";
if (v == SEQ_START_TOKEN)
seq_puts(seq, atm_pvc_banner);
else {
struct vcc_state *state = seq->private;
struct atm_vcc *vcc = atm_sk(state->sk);
pvc_info(seq, vcc);
}
return 0;
}
static const struct seq_operations pvc_seq_ops = {
.start = vcc_seq_start,
.next = vcc_seq_next,
.stop = vcc_seq_stop,
.show = pvc_seq_show,
};
static int pvc_seq_open(struct inode *inode, struct file *file)
{
return __vcc_seq_open(inode, file, PF_ATMPVC, &pvc_seq_ops);
}
static const struct file_operations pvc_seq_fops = {
.open = pvc_seq_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release_private,
};
static int vcc_seq_show(struct seq_file *seq, void *v)
{
if (v == SEQ_START_TOKEN) {
seq_printf(seq, sizeof(void *) == 4 ? "%-8s%s" : "%-16s%s",
"Address ", "Itf VPI VCI Fam Flags Reply "
"Send buffer Recv buffer [refcnt]\n");
} else {
struct vcc_state *state = seq->private;
struct atm_vcc *vcc = atm_sk(state->sk);
vcc_info(seq, vcc);
}
return 0;
}
static const struct seq_operations vcc_seq_ops = {
.start = vcc_seq_start,
.next = vcc_seq_next,
.stop = vcc_seq_stop,
.show = vcc_seq_show,
};
static int vcc_seq_open(struct inode *inode, struct file *file)
{
return __vcc_seq_open(inode, file, 0, &vcc_seq_ops);
}
static const struct file_operations vcc_seq_fops = {
.open = vcc_seq_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release_private,
};
static int svc_seq_show(struct seq_file *seq, void *v)
{
static char atm_svc_banner[] =
"Itf VPI VCI State Remote\n";
if (v == SEQ_START_TOKEN)
seq_puts(seq, atm_svc_banner);
else {
struct vcc_state *state = seq->private;
struct atm_vcc *vcc = atm_sk(state->sk);
svc_info(seq, vcc);
}
return 0;
}
static const struct seq_operations svc_seq_ops = {
.start = vcc_seq_start,
.next = vcc_seq_next,
.stop = vcc_seq_stop,
.show = svc_seq_show,
};
static int svc_seq_open(struct inode *inode, struct file *file)
{
return __vcc_seq_open(inode, file, PF_ATMSVC, &svc_seq_ops);
}
static const struct file_operations svc_seq_fops = {
.open = svc_seq_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release_private,
};
static ssize_t proc_dev_atm_read(struct file *file, char __user *buf,
size_t count, loff_t *pos)
{
struct atm_dev *dev;
unsigned long page;
int length;
if (count == 0) return 0;
page = get_zeroed_page(GFP_KERNEL);
if (!page) return -ENOMEM;
dev = PDE(file->f_path.dentry->d_inode)->data;
if (!dev->ops->proc_read)
length = -EINVAL;
else {
length = dev->ops->proc_read(dev,pos,(char *) page);
if (length > count) length = -EINVAL;
}
if (length >= 0) {
if (copy_to_user(buf,(char *) page,length)) length = -EFAULT;
(*pos)++;
}
free_page(page);
return length;
}
struct proc_dir_entry *atm_proc_root;
EXPORT_SYMBOL(atm_proc_root);
int atm_proc_dev_register(struct atm_dev *dev)
{
int digits,num;
int error;
/* No proc info */
if (!dev->ops->proc_read)
return 0;
error = -ENOMEM;
digits = 0;
for (num = dev->number; num; num /= 10) digits++;
if (!digits) digits++;
dev->proc_name = kmalloc(strlen(dev->type) + digits + 2, GFP_KERNEL);
if (!dev->proc_name)
goto err_out;
sprintf(dev->proc_name,"%s:%d",dev->type, dev->number);
dev->proc_entry = proc_create_data(dev->proc_name, 0, atm_proc_root,
&proc_atm_dev_ops, dev);
if (!dev->proc_entry)
goto err_free_name;
return 0;
err_free_name:
kfree(dev->proc_name);
err_out:
return error;
}
void atm_proc_dev_deregister(struct atm_dev *dev)
{
if (!dev->ops->proc_read)
return;
remove_proc_entry(dev->proc_name, atm_proc_root);
kfree(dev->proc_name);
}
static struct atm_proc_entry {
char *name;
const struct file_operations *proc_fops;
struct proc_dir_entry *dirent;
} atm_proc_ents[] = {
{ .name = "devices", .proc_fops = &devices_seq_fops },
{ .name = "pvc", .proc_fops = &pvc_seq_fops },
{ .name = "svc", .proc_fops = &svc_seq_fops },
{ .name = "vc", .proc_fops = &vcc_seq_fops },
{ .name = NULL, .proc_fops = NULL }
};
static void atm_proc_dirs_remove(void)
{
static struct atm_proc_entry *e;
for (e = atm_proc_ents; e->name; e++) {
if (e->dirent)
remove_proc_entry(e->name, atm_proc_root);
}
proc_net_remove(&init_net, "atm");
}
int __init atm_proc_init(void)
{
static struct atm_proc_entry *e;
int ret;
atm_proc_root = proc_net_mkdir(&init_net, "atm", init_net.proc_net);
if (!atm_proc_root)
goto err_out;
for (e = atm_proc_ents; e->name; e++) {
struct proc_dir_entry *dirent;
dirent = proc_create(e->name, S_IRUGO,
atm_proc_root, e->proc_fops);
if (!dirent)
goto err_out_remove;
dirent->owner = THIS_MODULE;
e->dirent = dirent;
}
ret = 0;
out:
return ret;
err_out_remove:
atm_proc_dirs_remove();
err_out:
ret = -ENOMEM;
goto out;
}
void atm_proc_exit(void)
{
atm_proc_dirs_remove();
}