#include <asm/uaccess.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/smp_lock.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/usb.h>
#include <linux/version.h>
#include <linux/vmalloc.h>
#include <linux/fs.h>
#include <linux/proc_fs.h>
MODULE_AUTHOR("Markus Rechberger");
MODULE_DESCRIPTION("testmodule");
MODULE_LICENSE("GPL");
static int rev_fill_super(struct super_block *sb, void *options, int silent){
printk(KERN_INFO"trying to mount this thing!\n");
printk(KERN_INFO"%s\n",sb->s_id);
printk(KERN_INFO"mounting options: %s\n",(char*)options);
return(-EINVAL);
}
struct super_block *revfs_get_sb (struct file_system_type *fs_type, int flags, const char *dev_name, void *data){
return get_sb_bdev(fs_type,flags,dev_name,data,rev_fill_super);
}
static struct file_system_type revfs_fs_type={
.owner = THIS_MODULE,
.name = "revfs",
.get_sb = revfs_get_sb,
.kill_sb = kill_block_super,
// .fs_flags = FS_REQUIRES_DEV,
};
static int foo_open(struct inode *inode, struct file *filp);
static ssize_t foo_read(struct file *filp, char *buf, size_t count, loff_t *f_pos);
static int foo_release(struct inode *inode, struct file *file);
static ssize_t foo_write(struct file *file, const char *buffer, size_t count, loff_t *ppos);
static struct proc_dir_entry *revfs_root = NULL;
const char *revfs_procfs_root = "revfs";
const char *revfs_procfs_mounts = "mounts";
static int aufgabe_major;
static struct file_operations foo_fops = {
owner: THIS_MODULE,
open: foo_open,
read: foo_read,
write: foo_write,
release: foo_release,
};
static int foo_open(struct inode *inode, struct file *filp){
printk("<1>hOhoooo .. someone want's me!!\n");
return(0);
}
static ssize_t foo_write(struct file *file, const char *buffer, size_t count, loff_t *ppos)
{
printk("<1>YYYEEP : someone told me :%s\n",buffer);
return(count);
}
static ssize_t foo_read(struct file *filp, char *buf, size_t count, loff_t *f_pos)
{
char name[100];
printk("<1>someone's reading here! %d bytes\n",count);
strcpy(name,"Markus Rechberger!");
copy_to_user(buf,name,strlen(name)+1);
return(strlen(name)+1);
}
static int foo_release(struct inode *inode, struct file *file)
{
return(0);
}
static int proc_revfs_read_mounts (char *buffer, char **start, off_t offset, int size, int *eof, void *data){
printk(KERN_INFO"procfs_read_mounts huhu\n");
return(0);
}
int init_module2(void){
printk("<1>Hello world\n");
revfs_root = proc_mkdir(revfs_procfs_root,NULL);
if(revfs_root!=NULL){
struct proc_dir_entry *entry;
revfs_root->owner = THIS_MODULE;
entry = create_proc_entry(revfs_procfs_mounts,S_IFREG|S_IRUGO,revfs_root);
if(entry!=NULL){
entry->read_proc = proc_revfs_read_mounts;
entry->owner = THIS_MODULE;
} else {
remove_proc_entry(revfs_procfs_root,NULL);
}
}
aufgabe_major=register_chrdev(0,"foo",&foo_fops);
register_filesystem (&revfs_fs_type);
printk("<1>registered: %d\n",aufgabe_major);
return 0;
}
void xcleanup_module(void){
remove_proc_entry (revfs_procfs_mounts, revfs_root);
remove_proc_entry (revfs_procfs_root, NULL);
if(unregister_chrdev(aufgabe_major,"foo")){
printk("error unregistering foo");
}
unregister_filesystem (&revfs_fs_type);
printk("<1>bybye!\n");
}
module_init(init_module2);
module_exit(xcleanup_module); |