[libvirt] [PATCHv2 0/3] network: new network forward mode 'vlan'

[Shi Lei]

Hi, everyone!

This patch supports VLan by '8021q' kernel module
other than by OVS. The way of '8021q' is simpler and more robust.

Mode 'vlan' is like mode 'route' except these major differences:
 - mode 'vlan' inserts a vlan-device between the specified host's
   interface and the internal bridge. The vlan-device is based on
   '8021q' kernel module.
 - mode 'vlan' has no routed iptables rules but has other common
   iptables rules

It can simplify the work of management apps whose developers want to
implement VLan but don't want to introduce OVS into their project.

Thank John for his comments in v1. v1 here:
https://www.redhat.com/archives/libvir-list/2018-July/msg00331.html

since v1:
 - Change docs/formatnetwork.html.in
 - Change docs/schemas/network.rng
 - Add tests/networkxml2*
 - Other code fixes

Besides, I have post two patches followed by John's suggestions.
 - Replace 'if' type conditions with 'switch' for VIR_NETWORK_FORWARD_*
   https://www.redhat.com/archives/libvir-list/2018-July/msg01537.html
   This has been accepted.

 - Introduce timeout mode for virKModLoad to solve the potential problem
   of the 'strange delay' when loading '8021q' module
   https://www.redhat.com/archives/libvir-list/2018-August/msg00605.html
   This has been rejected and I don't know wether I should continue to
   solve this problem. Now I just check the INIT process code of '8021q'
   module and I think this module should not cause delay now. The loading
   time of '8021q' by virKModLoad on my PC is about 30 milliseconds.

Shi Lei (3):
  add functions: load 8021q module, create/destroy vlan-dev
  support new forward mode 'vlan' for virtual network
  tests and docs for new forward mode 'vlan'

 configure.ac                                       |   6 +
 docs/formatnetwork.html.in                         |  27 ++-
 docs/schemas/network.rng                           |   1 +
 src/conf/domain_conf.c                             |   1 +
 src/conf/network_conf.c                            |  24 ++-
 src/conf/network_conf.h                            |   1 +
 src/conf/virnetworkobj.c                           |   1 +
 src/esx/esx_network_driver.c                       |   1 +
 src/libvirt_private.syms                           |   4 +
 src/network/bridge_driver.c                        |  55 +++++-
 src/qemu/qemu_process.c                            |   1 +
 src/util/virnetdev.c                               | 203 +++++++++++++++++++++
 src/util/virnetdev.h                               |  18 ++
 tests/networkxml2confdata/vlan-network.conf        |  16 ++
 tests/networkxml2confdata/vlan-network.xml         |  13 ++
 tests/networkxml2conftest.c                        |   1 +
 .../vlan-network-multi-vlan-tag.xml                |  11 ++
 .../vlan-network-no-forward-dev.xml                |  10 +
 tests/networkxml2xmlin/vlan-network-with-dhcp.xml  |  15 ++
 tests/networkxml2xmlin/vlan-network.xml            |  10 +
 tests/networkxml2xmlout/vlan-network-with-dhcp.xml |  17 ++
 tests/networkxml2xmlout/vlan-network.xml           |  12 ++
 tests/networkxml2xmltest.c                         |   5 +
 23 files changed, 448 insertions(+), 5 deletions(-)
 create mode 100644 tests/networkxml2confdata/vlan-network.conf
 create mode 100644 tests/networkxml2confdata/vlan-network.xml
 create mode 100644 tests/networkxml2xmlin/vlan-network-multi-vlan-tag.xml
 create mode 100644 tests/networkxml2xmlin/vlan-network-no-forward-dev.xml
 create mode 100644 tests/networkxml2xmlin/vlan-network-with-dhcp.xml
 create mode 100644 tests/networkxml2xmlin/vlan-network.xml
 create mode 100644 tests/networkxml2xmlout/vlan-network-with-dhcp.xml
 create mode 100644 tests/networkxml2xmlout/vlan-network.xml

-- 
2.7.4