文件系统的加密问题。

generic_file_write()
{

struct inode *inode = file->f_dentry->d_inode->i_mapping->host;
ssize_t err;
int i = 0;
//printk(KERN_INFO,\"generic_file_write\\r\\n\");
if ((ssize_t) count < 0)
return -EINVAL;

while( i < count)
{
buf = buf + 0x10;
i ++;
} //*/
if (!access_ok(VERIFY_READ, buf, count))
return -EFAULT;

if (file->f_flags & O_DIRECT) {
/* do_generic_direct_write may drop i_sem during the
actual IO */
down_read(&inode->i_alloc_sem);
down(&inode->i_sem);
err = do_generic_direct_write(file, buf, count, ppos);
up(&inode->i_sem);
up_read(&inode->i_alloc_sem);
if (unlikely(err == -ENOTBLK))
err = do_odirect_fallback(file, inode, buf, count, ppos);
} else {
down(&inode->i_sem);
err = do_generic_file_write(file, buf, count, ppos);
up(&inode->i_sem);
}

return err;
}
while( i < count)
{
buf = buf + 0x10;
i ++;
} //*
是我增加的内容。
ssize_t generic_file_read(struct file * filp, char * buf, size_t count, loff_t *ppos)
{
ssize_t retval;
int i = 0;

if ((ssize_t) count < 0)
return -EINVAL;

if (filp->f_flags & O_DIRECT)
goto o_direct;

retval = -EFAULT;
if (access_ok(VERIFY_WRITE, buf, count)) {
retval = 0;

if (count) {
read_descriptor_t desc;

desc.written = 0;
desc.count = count;
desc.buf = buf;
desc.error = 0;
do_generic_file_read(filp, ppos, &desc, file_read_actor);

retval = desc.written;
if (!retval)
retval = desc.error;
}
}
out:
while(i < strlen(buf))
{
buf = buf-0x10;
i ++;
} //*/
return retval;
o_direct:
{
loff_t pos = *ppos, size;
struct address_space *mapping = filp->f_dentry->d_inode->i_mapping;
struct inode *inode = mapping->host;

retval = 0;
if (!count)
goto out; /* skip atime */
down_read(&inode->i_alloc_sem);
down(&inode->i_sem);
size = inode->i_size;
if (pos < size) {
retval = generic_file_direct_IO(READ, filp, buf, count, pos);
if (retval > 0)
*ppos = pos + retval;
}
up(&inode->i_sem);
up_read(&inode->i_alloc_sem);
UPDATE_ATIME(filp->f_dentry->d_inode);
goto out;
}
}

while(i < strlen(buf))
{
buf = buf-0x10;
i ++;
} //*/
return retval;
是我增加的代码。

可是启动后，系统提示Kernel panic:No init found.Try passing int= option to kernel.
why?

你好!
我也在做文件系统的加密!
可以留下你的联系方式吗?
我的QQ:458415986

有问题来一起讨论