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/* $Id: ifconfig_net.c,v 1.1 2002/02/28 17:31:25 marcelo Exp $
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* ifconfig_net - SGI's Persistent Network Device names.
*
* Copyright (C) 1992-1997, 2000-2002 Silicon Graphics, Inc. All rights reserved.
*/
#include <linux/types.h>
#include <linux/config.h>
#include <linux/slab.h>
#include <linux/ctype.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <asm/sn/sgi.h>
#include <linux/devfs_fs.h>
#include <linux/devfs_fs_kernel.h>
#include <asm/io.h>
#include <asm/sn/iograph.h>
#include <asm/sn/invent.h>
#include <asm/sn/hcl.h>
#include <asm/sn/labelcl.h>
#include <asm/sn/ifconfig_net.h>
#define SGI_IFCONFIG_NET "SGI-PERSISTENT NETWORK DEVICE NAME DRIVER"
#define SGI_IFCONFIG_NET_VERSION "1.0"
/*
* Some Global definitions.
*/
devfs_handle_t ifconfig_net_handle = NULL;
unsigned long ifconfig_net_debug = 0;
/*
* ifconfig_net_open - Opens the special device node "/devhw/.ifconfig_net".
*/
static int ifconfig_net_open(struct inode * inode, struct file * filp)
{
if (ifconfig_net_debug) {
printk("ifconfig_net_open called.\n");
}
return(0);
}
/*
* ifconfig_net_close - Closes the special device node "/devhw/.ifconfig_net".
*/
static int ifconfig_net_close(struct inode * inode, struct file * filp)
{
if (ifconfig_net_debug) {
printk("ifconfig_net_close called.\n");
}
return(0);
}
/*
* assign_ifname - Assign the next available interface name from the persistent list.
*/
void
assign_ifname(struct net_device *dev,
struct ifname_num *ifname_num)
{
/*
* Handle eth devices.
*/
if ( (memcmp(dev->name, "eth", 3) == 0) ) {
if (ifname_num->next_eth != -1) {
/*
* Assign it the next available eth interface number.
*/
memset(dev->name, 0, strlen(dev->name));
sprintf(dev->name, "eth%d", (int)ifname_num->next_eth);
ifname_num->next_eth++;
}
return;
}
/*
* Handle fddi devices.
*/
if ( (memcmp(dev->name, "fddi", 4) == 0) ) {
if (ifname_num->next_fddi != -1) {
/*
* Assign it the next available fddi interface number.
*/
memset(dev->name, 0, strlen(dev->name));
sprintf(dev->name, "fddi%d", (int)ifname_num->next_fddi);
ifname_num->next_fddi++;
}
return;
}
/*
* Handle hip devices.
*/
if ( (memcmp(dev->name, "hip", 3) == 0) ) {
if (ifname_num->next_hip != -1) {
/*
* Assign it the next available hip interface number.
*/
memset(dev->name, 0, strlen(dev->name));
sprintf(dev->name, "hip%d", (int)ifname_num->next_hip);
ifname_num->next_hip++;
}
return;
}
/*
* Handle tr devices.
*/
if ( (memcmp(dev->name, "tr", 2) == 0) ) {
if (ifname_num->next_tr != -1) {
/*
* Assign it the next available tr interface number.
*/
memset(dev->name, 0, strlen(dev->name));
sprintf(dev->name, "tr%d", (int)ifname_num->next_tr);
ifname_num->next_tr++;
}
return;
}
/*
* Handle fc devices.
*/
if ( (memcmp(dev->name, "fc", 2) == 0) ) {
if (ifname_num->next_fc != -1) {
/*
* Assign it the next available fc interface number.
*/
memset(dev->name, 0, strlen(dev->name));
sprintf(dev->name, "fc%d", (int)ifname_num->next_fc);
ifname_num->next_fc++;
}
return;
}
}
/*
* find_persistent_ifname: Returns the entry that was seen in previous boot.
*/
struct ifname_MAC *
find_persistent_ifname(struct net_device *dev,
struct ifname_MAC *ifname_MAC)
{
while (ifname_MAC->addr_len) {
if (memcmp(dev->dev_addr, ifname_MAC->dev_addr, dev->addr_len) == 0)
return(ifname_MAC);
ifname_MAC++;
}
return(NULL);
}
/*
* ifconfig_net_ioctl: ifconfig_net driver ioctl interface.
*/
static int ifconfig_net_ioctl(struct inode * inode, struct file * file,
unsigned int cmd, unsigned long arg)
{
extern struct net_device *__dev_get_by_name(const char *);
#ifdef CONFIG_NET
struct net_device *dev;
struct ifname_MAC *found;
char temp[64];
#endif
struct ifname_MAC *ifname_MAC;
struct ifname_MAC *new_devices, *temp_new_devices;
struct ifname_num *ifname_num;
unsigned long size;
if (ifconfig_net_debug) {
printk("HCL: hcl_ioctl called.\n");
}
/*
* Read in the header and see how big of a buffer we really need to
* allocate.
*/
ifname_num = (struct ifname_num *) kmalloc(sizeof(struct ifname_num),
GFP_KERNEL);
copy_from_user( ifname_num, (char *) arg, sizeof(struct ifname_num));
size = ifname_num->size;
kfree(ifname_num);
ifname_num = (struct ifname_num *) kmalloc(size, GFP_KERNEL);
ifname_MAC = (struct ifname_MAC *) ((char *)ifname_num + (sizeof(struct ifname_num)) );
copy_from_user( ifname_num, (char *) arg, size);
new_devices = kmalloc(size - sizeof(struct ifname_num), GFP_KERNEL);
temp_new_devices = new_devices;
memset(new_devices, 0, size - sizeof(struct ifname_num));
#ifdef CONFIG_NET
/*
* Go through the net device entries and make them persistent!
*/
for (dev = dev_base; dev != NULL; dev = dev->next) {
/*
* Skip NULL entries or "lo"
*/
if ( (dev->addr_len == 0) || ( !strncmp(dev->name, "lo", strlen(dev->name))) ){
continue;
}
/*
* See if we have a persistent interface name for this device.
*/
found = NULL;
found = find_persistent_ifname(dev, ifname_MAC);
if (found) {
strcpy(dev->name, found->name);
} else {
/* Never seen this before .. */
assign_ifname(dev, ifname_num);
/*
* Save the information for the next boot.
*/
sprintf(temp,"%s %02x:%02x:%02x:%02x:%02x:%02x\n", dev->name,
dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
strcpy(temp_new_devices->name, dev->name);
temp_new_devices->addr_len = dev->addr_len;
memcpy(temp_new_devices->dev_addr, dev->dev_addr, dev->addr_len);
temp_new_devices++;
}
}
#endif
/*
* Copy back to the User Buffer area any new devices encountered.
*/
copy_to_user((char *)arg + (sizeof(struct ifname_num)), new_devices,
size - sizeof(struct ifname_num));
return(0);
}
struct file_operations ifconfig_net_fops = {
ioctl:ifconfig_net_ioctl, /* ioctl */
open:ifconfig_net_open, /* open */
release:ifconfig_net_close /* release */
};
/*
* init_ifconfig_net() - Boot time initialization. Ensure that it is called
* after devfs has been initialized.
*
*/
#ifdef MODULE
int init_module (void)
#else
int __init init_ifconfig_net(void)
#endif
{
ifconfig_net_handle = NULL;
ifconfig_net_handle = hwgraph_register(hwgraph_root, ".ifconfig_net",
0, DEVFS_FL_AUTO_DEVNUM,
0, 0,
S_IFCHR | S_IRUSR | S_IWUSR | S_IRGRP, 0, 0,
&ifconfig_net_fops, NULL);
if (ifconfig_net_handle == NULL) {
panic("Unable to create SGI PERSISTENT NETWORK DEVICE Name Driver.\n");
}
return(0);
}
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