This patch switches code to SPDX one-line license identifiers according to
https://spdx.dev/learn/handling-license-info/
and replacing long license text headers.
I used C++ format on the first line in style
// SPDX-License-Identifier: <id>
except exported libcryptsetup.h, when only C comments are used.
The only additional changes are:
- switch backend utf8.c from LGPL2+ to LGPL2.1+ (as in systemd)
- add some additional formatting lines.
The opal_range_check_attributes_fd function expected both
offset and length parameters of a LR to be passed in sectors (512B).
During format we passed it wrongly in OPAL blocks which caused
bogus check provided OPAL block size was not 512B.
Fixes: #871.
Activating LUKS2 device with OPAL support is multistep process.
1) read LR state
2) unlock LR
3) activate dm device
4) in case step 3) failed lock the device
if in step 1) the device was locked.
Otherwise, in case parallel activation happened on one device
the process that failed to map dm device (device already active)
could relock the LR afterwards and effectively break already active
device.
To avoid that we do steps 1) through 4) protected by exclusive
opal lock unique per data block device configured for use with
LUKS2 OPAL support.
