lvmlockd would read/write past the end of the lvmlock LV to determine the size, which triggered warnings in sanlock, so use the LV size to stop before going past the end. Also use the LV size to determine when it's been extended by another machine and the local lvmlock device needs to be refreshed.

https://gitlab.com/lvmteam/lvm2/-/commit/e9413fb2111d221f187cb65b9e9d4abc0c7ef744