Re: [RFC PATCH v2 0/8] qapi: net: add unix socket type support to netdev backend

[Stefano Brivio <sbrivio@redhat.com>]

On Thu, 12 May 2022 10:09:24 +0200
Laurent Vivier <lvivier@redhat.com> wrote:

> "-netdev socket" only supports inet sockets.
> 
> It's not a complex task to add support for unix sockets, but
> the socket netdev parameters are not defined to manage well unix
> socket parameters.
> 
> As discussed in:
> 
>   "socket.c added support for unix domain socket datagram transport"
>   https://lore.kernel.org/qemu-devel/1C0E1BC5-904F-46B0-8044-68E43E67BE60@gmail.com/
> 
> This series adds support of unix socket type using SocketAddress QAPI structure.
> 
> Two new netdev backends, "stream" and "dgram" are added, that are barely a copy of "socket"
> backend but they use the SocketAddress QAPI to provide socket parameters.
> And then they also implement unix sockets (TCP and UDP).
> 
> Some examples of CLI syntax:
> 
>   for TCP:
> 
>   -netdev stream,id=socket0,addr.type=inet,addr.host=localhost,addr.port=1234
>   -netdev stream,id=socket0,server=off,addr.type=inet,addr.host=localhost,addr.port=1234
> 
>   -netdev dgram,id=socket0,\
>           local.type=inet,local.host=localhost,local.port=1234,\
>           remote.type=inet,remote.host=localhost,remote.port=1235
> 
>   for UNIX:
> 
>   -netdev stream,id=socket0,addr.type=unix,addr.path=/tmp/qemu0
>   -netdev stream,id=socket0,server=off,addr.type=unix,addr.path=/tmp/qemu0
> 
>   -netdev dgram,id=socket0,\
>           local.type=unix,local.path=/tmp/qemu0,\
>           remote.type=unix,remote.path=/tmp/qemu1
> 
>   for FD:
> 
>   -netdev stream,id=socket0,addr.type=fd,addr.str=4
>   -netdev stream,id=socket0,server=off,addr.type=fd,addr.str=5
> 
>   -netdev dgram,id=socket0,local.type=fd,addr.str=4
> 
> v2:
>   - use "stream" and "dgram" rather than "socket-ng,mode=stream"
>     and ""socket-ng,mode=dgram"
>   - extract code to bypass qemu_opts_parse_noisily() to
>     a new patch
>   - do not ignore EINVAL (Stefano)
>   - fix "-net" option
> 
> CC: Ralph Schmieder <ralph.schmieder@gmail.com>
> CC: Stefano Brivio <sbrivio@redhat.com>
> CC: Daniel P. Berrangé <berrange@redhat.com>
> CC: Markus Armbruster <armbru@redhat.com>
> 
> Laurent Vivier (7):
>   net: introduce convert_host_port()
>   qapi: net: introduce a way to bypass qemu_opts_parse_noisily()
>   qapi: net: add stream and dgram netdevs
>   net: stream: add unix socket
>   net: dgram: make dgram_dst generic
>   net: dgram: move mcast specific code from net_socket_fd_init_dgram()
>   net: dgram: add unix socket
> 
> Stefano Brivio (1):
>   net: stream: Don't ignore EINVAL on netdev socket connection

Except for 4/8:
Reviewed-by: Stefano Brivio <sbrivio@redhat.com>

Except for 6/8 to 8/8:
Tested-by: Stefano Brivio <sbrivio@redhat.com>

-- 
Stefano