my bad.
insmod works fine and i could see "fortune" proc entry in /proc/net directory.
system hangs when i do the command - cat fortune
On Wed, Aug 17, 2011 at 10:50 PM, ratheesh kannoth
<ratheesh.ksz@xxxxxxxxx> wrote:
> 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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