Christian Brauner
4ddfd04a48
PR #41776 introduced the io.systemd.StorageProvider Varlink interface and two backends ('block' exposes host block devices, 'fs' exposes regular files / dirs / subvolumes under /var/lib/storage), plus the storagectl(1) CLI to enumerate them. The only consumer so far was mount.storage. This series wires up the first of the three integrations called out in TODO.md: systemd-vmspawn --bind-volume=PROVIDER:VOLUME[:CONFIG][:K=V,...] Boot-time attach. Drives added this way are immutable at runtime. io.systemd.MachineInstance.AddStorage / .RemoveStorage Two new generic methods on the per-machine control socket. vmspawn implements them (this series); systemd-nspawn will reuse the same methods later. machinectl bind-volume MACHINE PROVIDER:VOLUME[:CONFIG][:K=V,...] machinectl unbind-volume MACHINE PROVIDER:VOLUME Runtime hotplug front-end: machinectl Acquire()s the fd locally and pushes it across to the target machine's MachineInstance socket. Volumes are identified by a user-visible name "<provider>:<volume>" (e.g. "block:/dev/sda"). The 3rd 'config' field is opaque to the shared layer and interpreted per backend — vmspawn maps it to a DiskType from disk_type_table[] (virtio-blk default, virtio-scsi, nvme, scsi-cd; same vocabulary as --extra-drive); future nspawn will read it as a mount path.
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