[PATCH proxmox{,-backup} v2 0/2] fix #7329: network: unkwown iface option error

[Shan Shaji <s.shaji@proxmox.com>]

Using `inet6 auto` resulted in an error message in the web GUI. To fix
the issue, I added the `Auto` config method variant to the `NetworkConfigMethod` enum.
This fixed the error in the web GUI, but when editing the interface through the UI,
the `inet6 (auto)` family was still being removed.

For example, if I updated only the comment for the interface, the `auto` method was dropped.

This happened because, when editing the interface without providing
`cidr6` or `gateway6` values, the config method was being replaced
with `Manual` regardless of the current `inet6` method from the existing config.

Later, when writing the config to interfaces.new file if the config method was
`Manual` and there were no values present inside the `inet6` block, then the
entire stanza was removed.

To fix this, the `inet6` config method is now set to `Manual` only if the
interface method6 prop does not already have a value.

changes since v1: Thanks @chris
- added `fixes` trailer.
- fixed typo s/Inorder/In order
- api: fixed inet6 stanza getting dropped. 

#### Testing
- added a new bridge interface from the web UI.
- manually added inet6 (auto) address family to /etc/network/interfaces file for the
  bridge interface. 
- now from web ui, added a comment for the same interface. 
- verified if the block is getting removed. The comment was added and the block
  not getting removed. 
- Now updated the vmbr0 IPv4/CIDR value.
- verified if the method changed from manual to static.
- updated the vmbr0 IPv6/CIDR value.
- verified if the method changed from auto to static. 

proxmox:

Shan Shaji (1):
  fix #7329: proxmox-network-api: add missing `Auto` network config
    method

 proxmox-network-api/src/api_types.rs     |  2 ++
 proxmox-network-api/src/config/mod.rs    |  1 +
 proxmox-network-api/src/config/parser.rs | 43 ++++++++++++++++++++++++
 3 files changed, 46 insertions(+)


proxmox-backup:

Shan Shaji (1):
  fix #7329: api: avoid overwriting existing IPv6 config method

 src/api2/node/network.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)


Summary over all repositories:
  4 files changed, 47 insertions(+), 1 deletions(-)

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