ifconfig_net.c
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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:%02xn", 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);
- }