Hi all! Is it possible to get a crypted btrfs in a file? Currently I'm doing this to get a crypted ISO filesystem in a file: # genisoimage -R -J -iso-level 4 -o iso.img <dir_to_put_in_the_image> # fallocate iso-crypted.img -l $(stat --printf="%s" iso.img) # cryptsetup -d <key_to_crypt_iso> create test iso-crypted.img # dd if=iso.img of=/dev/mapper/test bs=512 # sync # cryptsetup remove test Is it possible to do something similar in btrfs? Is there something similar to 'genisoimage' in btrfs ? Or, at least, given a directory, is it possible to know the outcome size of the filesystem to create an empty file with fallocate and create a btrfs in a loop device like: # fallocate btrfs-crypted.img -l <btrfs_size_for_dir_to_put_in_the_image> # losetup /dev/loop0 btrfs-crypted.img # mkfs.btrfs /dev/loop0 then we can mount the loop0, copy the files, unmount and then crypt the btrfs-crypted.img like the ISO one. Thanks! Jorge
