I try to get register values of a NIC , using below module. But wen i
try to insmod the module, system hangs. I dont have any clue
what is happening, Could you please help me a little.
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/proc_fs.h>
#include <linux/string.h>
#include <linux/vmalloc.h>
#include <asm/uaccess.h>
#include <net/net_namespace.h>
#include <linux/if_ether.h>
#include <linux/netfilter/xt_time.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/netfilter.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Fortune Cookie Kernel Module");
MODULE_AUTHOR("M. Tim Jones");
static struct proc_dir_entry *proc_entry;
static struct proc_dir_entry *proc_dir_entry;
int fortune_read(char *buffer, char **start, off_t off,
int count, int *eof, void *data)
{
struct net_device *dev ;
struct ethtool_regs reg;
if (off > 0) {
printk(KERN_INFO "we have finished to read ");
return 0;
}
dev=(struct net_device *)dev_get_by_name(&init_net, "eth0");
#if 1
if(dev->ethtool_ops->get_regs) {
dev->ethtool_ops->get_regs(dev, ®, (void *)buffer);
}
#endif
return count;
}
int fortune_write(struct file *file, const char __user *buffer,
unsigned long count, void *data)
{
return count;
}
int init_fortune_module( void )
{
struct file *filp = filp_open("/proc/net", O_RDONLY, 0);
proc_dir_entry = PDE(filp->f_dentry->d_inode);
proc_entry = create_proc_entry( "fortune", 0644, proc_dir_entry );
if (proc_entry == NULL) {
printk(KERN_INFO "fortune: Couldn't create proc entry\n");
} else {
proc_entry->read_proc = fortune_read;
proc_entry->write_proc = fortune_write;
printk(KERN_INFO "fortune: Module loaded.\n");
}
return 0;
}
void cleanup_fortune_module( void )
{
remove_proc_entry("fortune", proc_dir_entry);
printk(KERN_INFO "fortune: Module unloaded.\n");
}
module_init( init_fortune_module );
module_exit( cleanup_fortune_module );
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