/*****************************************************************************
* wanproc.c WAN Router Module. /proc filesystem interface.
*
* This module is completely hardware-independent and provides
* access to the router using Linux /proc filesystem.
*
* Author: Gideon Hack
*
* Copyright: (c) 1995-1999 Sangoma Technologies Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
* ============================================================================
* Jun 02, 1999 Gideon Hack Updates for Linux 2.2.X kernels.
* Jun 29, 1997 Alan Cox Merged with 1.0.3 vendor code
* Jan 29, 1997 Gene Kozin v1.0.1. Implemented /proc read routines
* Jan 30, 1997 Alan Cox Hacked around for 2.1
* Dec 13, 1996 Gene Kozin Initial version (based on Sangoma's WANPIPE)
*****************************************************************************/
#include <linux/init.h> /* __initfunc et al. */
#include <linux/stddef.h> /* offsetof(), etc. */
#include <linux/errno.h> /* return codes */
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/wanrouter.h> /* WAN router API definitions */
#include <linux/seq_file.h>
#include <linux/mutex.h>
#include <net/net_namespace.h>
#include <asm/io.h>
#define PROC_STATS_FORMAT "%30s: %12lu\n"
/****** Defines and Macros **************************************************/
#define PROT_DECODE(prot) ((prot == WANCONFIG_FR) ? " FR" :\
(prot == WANCONFIG_X25) ? " X25" : \
(prot == WANCONFIG_PPP) ? " PPP" : \
(prot == WANCONFIG_CHDLC) ? " CHDLC": \
(prot == WANCONFIG_MPPP) ? " MPPP" : \
" Unknown" )
/****** Function Prototypes *************************************************/
#ifdef CONFIG_PROC_FS
/* Miscellaneous */
/*
* Structures for interfacing with the /proc filesystem.
* Router creates its own directory /proc/net/router with the following
* entries:
* config device configuration
* status global device statistics
* <device> entry for each WAN device
*/
/*
* Generic /proc/net/router/<file> file and inode operations
*/
/*
* /proc/net/router
*/
static DEFINE_MUTEX(config_mutex);
static struct proc_dir_entry *proc_router;
/* Strings */
/*
* Interface functions
*/
/****** Proc filesystem entry points ****************************************/
/*
* Iterator
*/
static void *r_start(struct seq_file *m, loff_t *pos)
{
struct wan_device *wandev;
loff_t l = *pos;
mutex_lock(&config_mutex);
if (!l--)
return SEQ_START_TOKEN;
for (wandev = wanrouter_router_devlist; l-- && wandev;
wandev = wandev->next)
;
return wandev;
}
static void *r_next(struct seq_file *m, void *v, loff_t *pos)
{
struct wan_device *wandev = v;
(*pos)++;
return (v == SEQ_START_TOKEN) ? wanrouter_router_devlist : wandev->next;
}
static void r_stop(struct seq_file *m, void *v)
{
mutex_unlock(&config_mutex);
}
static int config_show(struct seq_file *m, void *v)
{
struct wan_device *p = v;
if (v == SEQ_START_TOKEN) {
seq_puts(m, "Device name | port |IRQ|DMA| mem.addr |"
"mem.size|option1|option2|option3|option4\n");
return 0;
}
if (!p->state)
return 0;
seq_printf(m, "%-15s|0x%-4X|%3u|%3u| 0x%-8lX |0x%-6X|%7u|%7u|%7u|%7u\n",
p->name, p->ioport, p->irq, p->dma, p->maddr, p->msize,
p->hw_opt[0], p->hw_opt[1], p->hw_opt[2], p->hw_opt[3]);
return 0;
}
static int status_show(struct seq_file *m, void *v)
{
struct wan_device *p = v;
if (v == SEQ_START_TOKEN) {
seq_puts(m, "Device name |protocol|station|interface|"
"clocking|baud rate| MTU |ndev|link state\n");
return 0;
}
if (!p->state)
return 0;
seq_printf(m, "%-15s|%-8s| %-7s| %-9s|%-8s|%9u|%5u|%3u |",
p->name,
PROT_DECODE(p->config_id),
p->config_id == WANCONFIG_FR ?
(p->station ? "Node" : "CPE") :
(p->config_id == WANCONFIG_X25 ?
(p->station ? "DCE" : "DTE") :
("N/A")),
p->interface ? "V.35" : "RS-232",
p->clocking ? "internal" : "external",
p->bps,
p->mtu,
p->ndev);
switch (p->state) {
case WAN_UNCONFIGURED:
seq_printf(m, "%-12s\n", "unconfigured");
break;
case WAN_DISCONNECTED:
seq_printf(m, "%-12s\n", "disconnected");
break;
case WAN_CONNECTING:
seq_printf(m, "%-12s\n", "connecting");
break;
case WAN_CONNECTED:
seq_printf(m, "%-12s\n", "connected");
break;
default:
seq_printf(m, "%-12s\n", "invalid");
break;
}
return 0;
}
static const struct seq_operations config_op = {
.start = r_start,
.next = r_next,
.stop = r_stop,
.show = config_show,
};
static const struct seq_operations status_op = {
.start = r_start,
.next = r_next,
.stop = r_stop,
.show = status_show,
};
static int config_open(struct inode *inode, struct file *file)
{
return seq_open(file, &config_op);
}
static int status_open(struct inode *inode, struct file *file)
{
return seq_open(file, &status_op);
}
static const struct file_operations config_fops = {
.owner = THIS_MODULE,
.open = config_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
static const struct file_operations status_fops = {
.owner = THIS_MODULE,
.open = status_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
static int wandev_show(struct seq_file *m, void *v)
{
struct wan_device *wandev = m->private;
if (wandev->magic != ROUTER_MAGIC)
return 0;
if (!wandev->state) {
seq_puts(m, "device is not configured!\n");
return 0;
}
/* Update device statistics */
if (wandev->update) {
int err = wandev->update(wandev);
if (err == -EAGAIN) {
seq_puts(m, "Device is busy!\n");
return 0;
}
if (err) {
seq_puts(m, "Device is not configured!\n");
return 0;
}
}
seq_printf(m, PROC_STATS_FORMAT,
"total packets received", wandev->stats.rx_packets);
seq_printf(m, PROC_STATS_FORMAT,
"total packets transmitted", wandev->stats.tx_packets);
seq_printf(m, PROC_STATS_FORMAT,
"total bytes received", wandev->stats.rx_bytes);
seq_printf(m, PROC_STATS_FORMAT,
"total bytes transmitted", wandev->stats.tx_bytes);
seq_printf(m, PROC_STATS_FORMAT,
"bad packets received", wandev->stats.rx_errors);
seq_printf(m, PROC_STATS_FORMAT,
"packet transmit problems", wandev->stats.tx_errors);
seq_printf(m, PROC_STATS_FORMAT,
"received frames dropped", wandev->stats.rx_dropped);
seq_printf(m, PROC_STATS_FORMAT,
"transmit frames dropped", wandev->stats.tx_dropped);
seq_printf(m, PROC_STATS_FORMAT,
"multicast packets received", wandev->stats.multicast);
seq_printf(m, PROC_STATS_FORMAT,
"transmit collisions", wandev->stats.collisions);
seq_printf(m, PROC_STATS_FORMAT,
"receive length errors", wandev->stats.rx_length_errors);
seq_printf(m, PROC_STATS_FORMAT,
"receiver overrun errors", wandev->stats.rx_over_errors);
seq_printf(m, PROC_STATS_FORMAT,
"CRC errors", wandev->stats.rx_crc_errors);
seq_printf(m, PROC_STATS_FORMAT,
"frame format errors (aborts)", wandev->stats.rx_frame_errors);
seq_printf(m, PROC_STATS_FORMAT,
"receiver fifo overrun", wandev->stats.rx_fifo_errors);
seq_printf(m, PROC_STATS_FORMAT,
"receiver missed packet", wandev->stats.rx_missed_errors);
seq_printf(m, PROC_STATS_FORMAT,
"aborted frames transmitted", wandev->stats.tx_aborted_errors);
return 0;
}
static int wandev_open(struct inode *inode, struct file *file)
{
return single_open(file, wandev_show, PDE(inode)->data);
}
static const struct file_operations wandev_fops = {
.owner = THIS_MODULE,
.open = wandev_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.unlocked_ioctl = wanrouter_ioctl,
};
/*
* Initialize router proc interface.
*/
int __init wanrouter_proc_init(void)
{
struct proc_dir_entry *p;
proc_router = proc_mkdir(ROUTER_NAME, init_net.proc_net);
if (!proc_router)
goto fail;
p = proc_create("config", S_IRUGO, proc_router, &config_fops);
if (!p)
goto fail_config;
p = proc_create("status", S_IRUGO, proc_router, &status_fops);
if (!p)
goto fail_stat;
return 0;
fail_stat:
remove_proc_entry("config", proc_router);
fail_config:
remove_proc_entry(ROUTER_NAME, init_net.proc_net);
fail:
return -ENOMEM;
}
/*
* Clean up router proc interface.
*/
void wanrouter_proc_cleanup(void)
{
remove_proc_entry("config", proc_router);
remove_proc_entry("status", proc_router);
remove_proc_entry(ROUTER_NAME, init_net.proc_net);
}
/*
* Add directory entry for WAN device.
*/
int wanrouter_proc_add(struct wan_device* wandev)
{
if (wandev->magic != ROUTER_MAGIC)
return -EINVAL;
wandev->dent = proc_create(wandev->name, S_IRUGO,
proc_router, &wandev_fops);
if (!wandev->dent)
return -ENOMEM;
wandev->dent->data = wandev;
return 0;
}
/*
* Delete directory entry for WAN device.
*/
int wanrouter_proc_delete(struct wan_device* wandev)
{
if (wandev->magic != ROUTER_MAGIC)
return -EINVAL;
remove_proc_entry(wandev->name, proc_router);
return 0;
}
#else
/*
* No /proc - output stubs
*/
int __init wanrouter_proc_init(void)
{
return 0;
}
void wanrouter_proc_cleanup(void)
{
}
int wanrouter_proc_add(struct wan_device *wandev)
{
return 0;
}
int wanrouter_proc_delete(struct wan_device *wandev)
{
return 0;
}
#endif
/*
* End
*/