[RFC 2/6] vfs: Add checks for filesystem timestamp limits

Allow read only mounts for filesystems that do not have maximum timestamps beyond the y2038 expiry timestamp. Also, allow a sysctl override to all such filesystems to be mounted with write permissions. Alternatively, a mount option can be created to allow or disallow range check based clamps and

[RFC 2/6] vfs: Add checks for filesystem timestamp limits

Allow read only mounts for filesystems that do not have maximum timestamps beyond the y2038 expiry timestamp. Also, allow a sysctl override to all such filesystems to be mounted with write permissions. Alternatively, a mount option can be created to allow or disallow range check based clamps and