On Mon, Jun 12, 2023 at 03:52:17PM +0200, Sergei Shtepa wrote: > Hi all. > > I am happy to offer a improved version of the Block Devices Snapshots > Module. It allows to create non-persistent snapshots of any block devices. > The main purpose of such snapshots is to provide backups of block devices. > See more in Documentation/block/blksnap.rst. How does blksnap interact with blk-crypto? I.e., what happens if a bio with a ->bi_crypt_context set is submitted to a block device that has blksnap active? If you are unfamiliar with blk-crypto, please read Documentation/block/inline-encryption.rst It looks like blksnap hooks into the block layer directly, via the new "blkfilter" mechanism. I'm concerned that it might ignore ->bi_crypt_context and write data to the disk in plaintext, when it is supposed to be encrypted. - Eric
