Support for ATS-Only Locking mode

[einhirn]

To migrate VMs off of VMWare over to Proxmox, I'm trying to use vmfs6-fuse to mount a VMFS6 filesystem from a shared iSCSI LUN that's still active and used by ESXi hosts. This doesn't seem to work because the VMFS6 file system in question is using ATS-only locking, no SCSI-Reservations.

Can vmfs6-tools somehow be used in a purely read-only way? Or can it support ATS-only locking mechanism?

(Actually, accessing it from Linux created a problem where ESXi couldn't access the Datastore any more - good thing I used a test datastore first. Had to pull the plug by unmapping it on the storage system for ESXi to recover... 😱)

[einhirn]

Would probably need rewrite of 'vmfs_heartbeat.h/c' to use "Atomic Test and Set" and the needed workarounds like Retries or checking for miscompares - see here, this was the most concrete Info I found about this:
https://forum.huawei.com/enterprise/intl/en/thread/Some-introduction-about-ATS-which-belonged-to-VAAI-Block-Primitives/667222657298481152?blogId=667222657298481152