virtualisation.sharedDirectories.<name>.securityModel

The security model to use for this share:

• passthrough: files are stored using the same credentials as they are created on the guest (this requires QEMU to run as root)
• mapped-xattr: some of the file attributes like uid, gid, mode bits and link target are stored as file attributes
• mapped-file: the attributes are stored in the hidden .virtfs_metadata directory. Directories exported by this security model cannot interact with other unix tools
• none: same as "passthrough" except the sever won't report failures if it fails to set file attributes like ownership.