virtio-net devices can be created from externally provided network FDs. So far, live-migration doesn't work. This should be implemented. The management software must provide new FDs on the new host for each network device.

Steps

Mandatory Functionality

• 1. vmm/api: document and streamline process of externally passed FDs for virtio-net devices #7281
• 2. devices: gracefully close preserved FDs on hot device remove #7371 [WIP] devices: remove preserved fds on device hot detach #7278
• 3. [WIP] vmm: migration: virtio-net devices with external FDs #7379 [WIP] add support for live-migration of virtio-net devices & network FDs #7150

Quality of Life Improvements

• 1. net_util: misc improvements #7279
• 2. [WIP] misc debugabillity and traceability improvements #7280
  • needs a restart
• 3. [WIP] vmm: simplify and streamline preserved FD handling #7382
  • needs a restart

Companion of #7054 but here I have write rights and can tick boxes for each step.