Ondrej Kozina 0ca1e680db opal: add exclusive lock to avoid race. ...

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.

2023-12-13 20:59:14 +00:00

..

hw_opal.c

opal: add exclusive lock to avoid race.

2023-12-13 20:59:14 +00:00

hw_opal.h

opal: add exclusive lock to avoid race.

2023-12-13 20:59:14 +00:00