Hi,
I'm new in linux file system and I'm trying to modify the ext2 fs to
encrypt/decrypt files on the fly without using cryptoloop.
I think I can intercept write/read file operations to encrypt/decrypt
inner/outer buffer.
Maybe another solution is to encrypt/decrypt page just before/after the
page is written to/read from the block device:
Sync_page:
{
If (page will be written)
Encrypt_page
Send_blockdev_request
Decrypt_page to get decrypted page in cache
Else (page will be read)
Send_blockdev_request
Decrypt_page
}
In this case I'm wondering if I can just intercept the sync_page
operation to do such a work. As the request block operations are
buffered in a queue what could happen when a read and a write request
are performed in same time (I don't known if it could occur)?
What do you thing about that ? Could you help me please ?
Thanks,
David
-
Linux-crypto: cryptography in and on the Linux system
Archive: http://mail.nl.linux.org/linux-crypto/
