在 2022/1/6 下午12:18, Jason Wang 写道:

在 2021/12/11 下午6:44, Vladislav Yaroshchuk 写道:
macOS provides networking API for VMs called 'vmnet.framework':
https://developer.apple.com/documentation/vmnet

We can provide its support as the new QEMU network backends which
represent three different vmnet.framework interface usage modes:

   * `vmnet-shared`:
     allows the guest to communicate with other guests in shared mode and
     also with external network (Internet) via NAT. Has (macOS-provided)
     DHCP server; subnet mask and IP range can be configured;

   * `vmnet-host`:
     allows the guest to communicate with other guests in host mode.
     By default has enabled DHCP as `vmnet-shared`, but providing
     network unique id (uuid) can make `vmnet-host` interfaces isolated
     from each other and also disables DHCP.

   * `vmnet-bridged`:
     bridges the guest with a physical network interface.

This backends cannot work on macOS Catalina 10.15 cause we use
vmnet.framework API provided only with macOS 11 and newer. Seems
that it is not a problem, because QEMU guarantees to work on two most
recent versions of macOS which now are Big Sur (11) and Monterey (12).

Also, we have one inconvenient restriction: vmnet.framework interfaces
can create only privileged user:
`$ sudo qemu-system-x86_64 -nic vmnet-shared`

Attempt of `vmnet-*` netdev creation being unprivileged user fails with
vmnet's 'general failure'.

This happens because vmnet.framework requires `com.apple.vm.networking`
entitlement which is: "restricted to developers of virtualization software. To request this entitlement, contact your Apple representative." as Apple
documentation says:
https://developer.apple.com/documentation/bundleresources/entitlements/com_apple_vm_networking

One more note: we still have quite useful but not supported
'vmnet.framework' features as creating port forwarding rules, IPv6
NAT prefix specifying and so on.

Nevertheless, new backends work fine and tested within `qemu-system-x86-64`
on macOS Bir Sur 11.5.2 host with such nic models:
   * e1000-82545em
   * virtio-net-pci
   * vmxnet3

The guests were:
   * macOS 10.15.7
   * Ubuntu Bionic (server cloudimg)


This series partially reuses patches by Phillip Tennen:
https://patchew.org/QEMU/20210218134947.1860-1-phillip.en...@gmail.com/
So I included them signed-off line into one of the commit messages and
also here.


Applied.

Thanks


Reverted actually, though it can be built on macos but not Linux. I see thing like:

In file included from qapi/qapi-types-net.c:15:
qapi/qapi-types-net.h:411:9: error: unknown type name ‘NetdevVmnetHostOptions’
  411 |         NetdevVmnetHostOptions vmnet_host;
      |         ^~~~~~~~~~~~~~~~~~~~~~
qapi/qapi-types-net.h:412:9: error: unknown type name ‘NetdevVmnetSharedOptions’
  412 |         NetdevVmnetSharedOptions vmnet_shared;
      |         ^~~~~~~~~~~~~~~~~~~~~~~~
qapi/qapi-types-net.h:413:9: error: unknown type name ‘NetdevVmnetBridgedOptions’
  413 |         NetdevVmnetBridgedOptions vmnet_bridged;
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~

....

Thanks



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