[pkg-cryptsetup-devel] plain problems

[ael]

After today's testing upgrade to cryptsetup-bin version 2:2.7.2-2, my
plain encrypted usb stick can no longer be decrypted.

Decrypting on an older testing machine shows
aes-cbc-essiv:sha256
key size 256
sector size 512
and so on

just as man 8 cryptsetup-open suggests.

Using 
/sbin/cryptsetup open --type plain  <device>  e1 --cipher aes-cbc-essiv:sha256 --key-size 256
--hash sha256

appears to work, but it fails to mount. I did use
modprobe essiv

dmesg showed
VFS: Can't find ext4 filesystem
which is not surprising: it is f2fs. But even using -f f2fs on the mount
command did not help.

What am I missing?

Thanks in advance: getting to the encrypted info is rather urgent.

ael