static ssize_t slm_read( struct file *file, char *buf, size_t count,
loff_t *ppos )
{
struct inode *node = file->f_dentry->d_inode;
loff_t pos = *ppos;
unsigned long page;
int length;
int end;
if (count < 0)
return( -EINVAL );
if (!(page = __get_free_page( GFP_KERNEL )))
return( -ENOMEM );
length = slm_getstats( (char *)page, MINOR(node->i_rdev) );
if (length < 0) {
count = length;
goto out;
}
if (pos < 0 || pos >= length) {
count = 0;
goto out;
}
if (count > length - pos)
count = length - pos;
end = count + pos;
if (copy_to_user(buf, (char *)page + pos, count)) {
count = -EFAULT;
goto out;
}
*ppos = end;
out: free_page( page );
return( count );
}
static ssize_t slm_read( struct file *file, char *buf, size_t count,
loff_t *ppos )
{
struct inode *node = file->f_dentry->d_inode;
unsigned long page;
int length;
int end;
if (count < 0)
return( -EINVAL );
if (!(page = __get_free_page( GFP_KERNEL )))
return( -ENOMEM );
length = slm_getstats( (char *)page, MINOR(node->i_rdev) );
if (length < 0) {
free_page( page );
return( length );
}
if (file->f_pos >= length) {
free_page( page );
return( 0 );
}
if (count + file->f_pos > length)
count = length - file->f_pos;
end = count + file->f_pos;
copy_to_user( buf, (char *)page + file->f_pos, count );
free_page( page );
file->f_pos = end;
return( count );
}
