Original messages could evoke reencryption is currently
in progress. That was inaccurate because code only
detected flag marking such device is in transition state
from metadata pov. We should not imply anything about
running processes. That's detected via reencryption locks.
- make error messages propagated to users more comprehensible
- drop some error messages completely
- replace many error messages with debug logs only
Fixes#458.
LUKS2 and other device types allow stacking of dm devices
underneath public top level device.
The new type identifies clearly those private devices in respective
device stack so that they can be easily removed while removing
top level public device.
Switch LUKS2 reencryption device stack to use SUBDEV type immmediately
for hotzone and overlay devices. Other devices will follow in later
releases.
It's useful to reencrypt only initial device part only.
For example with golden image reencryption it may be useful
to reencrypt only first X bytes of device because we know
the rest of device is empty.
The JSON structures should not be printed by default to debug log.
This flag introduces new debug level that prints JSON structures
and keeps default debug output separate.
This patch makes available LUKS2 per-keyslot encryption settings to user.
In LUKS2, keyslot can use different encryption that data.
We can use new crypt_keyslot_get_encryption and crypt_keyslot_set_encryption
API calls to set/get this encryption.
For cryptsetup new --keyslot-cipher and --keyslot-key-size options are added.
The default keyslot encryption algorithm (if cannot be derived from data encryption)
is now available as configure options (default is aes-xts-plain64 with 512-bits key).
NOTE: default was increased from 256-bits.
Support for multi-segment devices is requirement for online
reencryption to work. Introducing modififed dm backend that
splits data structures describing active device and individual
dm target (or segment).
The new flag is supposed to refresh (reload) active dm-crypt
mapping with new set of activation flags. CRYPT_ACTIVATE_READONLY
can not be switched for already active device.
The flag is silently ignored for tcrypt, verity and integrity
devices. LUKS2 with authenticated encryption support is added in
later commit.
Also print these area sizes in dump command.
NOTE: since now, the metadata area size in dump command contains
mandatory 4k binary section (to be aligned with API definition).
