patch-2.4.22 linux-2.4.22/arch/ia64/sn/io/drivers/ifconfig_net.c

• Lines: 299
• Date: 2003-08-25 04:44:39.000000000 -0700
• Orig file: linux-2.4.21/arch/ia64/sn/io/drivers/ifconfig_net.c
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.21/arch/ia64/sn/io/drivers/ifconfig_net.c linux-2.4.22/arch/ia64/sn/io/drivers/ifconfig_net.c
@@ -0,0 +1,298 @@
+/* $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, 2000-2003 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.
+ */
+static devfs_handle_t ifconfig_net_handle;
+static unsigned long ifconfig_net_debug;
+
+/*
+ * 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);
+
+}