Commit d002298e authored by Chas Williams's avatar Chas Williams Committed by Hideaki Yoshifuji

[ATM]: seq_file for /proc/net/atm (devices) [1/8] (from romieu@fr.zoreil.com)

seq_file conversion for proc/atm/devices:
- code inspired from seq_file use in net/core/dev.c;
- atm_dev_lock taken/released in atm_dev_seq_{start/stop};
- add a helper CREATE_SEQ_ENTRY() similar to CREATE_ENTRY() (both are removed
  once conversion is done).
- atm_dev_seq_{start/stop/next} done in net/atm/resource.[ch] to ease
  future handling of atm_devs and locking structure (per Chas suggestion)
parent dfdd4d51
No related merge requests found
......@@ -24,6 +24,7 @@
#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>
......@@ -64,32 +65,30 @@ static struct file_operations proc_spec_atm_operations = {
.read = proc_spec_atm_read,
};
static void add_stats(char *buf,const char *aal,
static void add_stats(struct seq_file *seq, const char *aal,
const struct k_atm_aal_stats *stats)
{
sprintf(strchr(buf,0),"%s ( %d %d %d %d %d )",aal,
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(const struct atm_dev *dev,char *buf)
static void atm_dev_info(struct seq_file *seq, const struct atm_dev *dev)
{
int off,i;
int i;
off = sprintf(buf,"%3d %-8s",dev->number,dev->type);
seq_printf(seq, "%3d %-8s", dev->number, dev->type);
for (i = 0; i < ESI_LEN; i++)
off += sprintf(buf+off,"%02x",dev->esi[i]);
strcat(buf," ");
add_stats(buf,"0",&dev->stats.aal0);
strcat(buf," ");
add_stats(buf,"5",&dev->stats.aal5);
sprintf(strchr(buf,0), "\t[%d]", atomic_read(&dev->refcnt));
strcat(buf,"\n");
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');
}
#if defined(CONFIG_ATM_CLIP) || defined(CONFIG_ATM_CLIP_MODULE)
......@@ -303,29 +302,40 @@ lec_info(struct lec_arp_table *entry, char *buf)
#endif
static int atm_devices_info(loff_t pos,char *buf)
static int atm_dev_seq_show(struct seq_file *seq, void *v)
{
struct atm_dev *dev;
struct list_head *p;
int left;
static char atm_dev_banner[] =
"Itf Type ESI/\"MAC\"addr "
"AAL(TX,err,RX,err,drop) ... [refcnt]\n";
if (v == (void *)1)
seq_puts(seq, atm_dev_banner);
else {
struct atm_dev *dev = list_entry(v, struct atm_dev, dev_list);
if (!pos) {
return sprintf(buf,"Itf Type ESI/\"MAC\"addr "
"AAL(TX,err,RX,err,drop) ... [refcnt]\n");
}
left = pos-1;
spin_lock(&atm_dev_lock);
list_for_each(p, &atm_devs) {
dev = list_entry(p, struct atm_dev, dev_list);
if (left-- == 0) {
atm_dev_info(dev,buf);
spin_unlock(&atm_dev_lock);
return strlen(buf);
}
atm_dev_info(seq, dev);
}
spin_unlock(&atm_dev_lock);
return 0;
return 0;
}
static 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 struct file_operations devices_seq_fops = {
.open = atm_dev_seq_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
/*
* FIXME: it isn't safe to walk the VCC list without turning off interrupts.
......@@ -630,6 +640,14 @@ void atm_proc_dev_deregister(struct atm_dev *dev)
kfree(dev->proc_name);
}
#define CREATE_SEQ_ENTRY(name) \
do { \
name = create_proc_entry(#name, S_IRUGO, atm_proc_root); \
if (!name) \
goto cleanup; \
name->proc_fops = & name##_seq_fops; \
name->owner = THIS_MODULE; \
} while (0)
#define CREATE_ENTRY(name) \
name = create_proc_entry(#name,0,atm_proc_root); \
......@@ -663,7 +681,7 @@ int __init atm_proc_init(void)
atm_proc_root = proc_mkdir("net/atm",NULL);
if (!atm_proc_root)
return -ENOMEM;
CREATE_ENTRY(devices);
CREATE_SEQ_ENTRY(devices);
CREATE_ENTRY(pvc);
CREATE_ENTRY(svc);
CREATE_ENTRY(vc);
......
......@@ -395,6 +395,35 @@ int atm_dev_ioctl(unsigned int cmd, unsigned long arg)
return error;
}
static __inline__ void *dev_get_idx(loff_t left)
{
struct list_head *p;
list_for_each(p, &atm_devs) {
if (!--left)
break;
}
return (p != &atm_devs) ? p : NULL;
}
void *atm_dev_seq_start(struct seq_file *seq, loff_t *pos)
{
spin_lock(&atm_dev_lock);
return *pos ? dev_get_idx(*pos) : (void *) 1;
}
void atm_dev_seq_stop(struct seq_file *seq, void *v)
{
spin_unlock(&atm_dev_lock);
}
void *atm_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
++*pos;
v = (v == (void *)1) ? atm_devs.next : ((struct list_head *)v)->next;
return (v == &atm_devs) ? NULL : v;
}
EXPORT_SYMBOL(atm_dev_register);
EXPORT_SYMBOL(atm_dev_deregister);
......
......@@ -21,6 +21,11 @@ int atm_dev_ioctl(unsigned int cmd, unsigned long arg);
#include <linux/proc_fs.h>
void *atm_dev_seq_start(struct seq_file *seq, loff_t *pos);
void atm_dev_seq_stop(struct seq_file *seq, void *v);
void *atm_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
int atm_proc_dev_register(struct atm_dev *dev);
void atm_proc_dev_deregister(struct atm_dev *dev);
......
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