"-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
v7:
- add qtests
- update parameters table in net.json
- update socket_uri() and socket_parse()
v6:
- s/netdev option/-netdev option/ PATCH 4
- s/ / /
- update @NetdevStreamOptions and @NetdevDgramOptions comments
- update PATCH 4 description message
- add missing return in error case for unix stream socket
- split socket_uri() patch: move and rename, then change content
v5:
- remove RFC prefix
- put the change of net_client_parse() into its own patch (exit() in the
function)
- update comments regarding netdev_is_modern() and netdev_parse_modern()
- update error case in net_stream_server_init()
- update qemu-options.hx with unix type
- fix HMP "info network" with unix protocol/server side.
v4:
- net_client_parse() fails with exit() rather than with return.
- keep "{ 'name': 'vmnet-host', 'if': 'CONFIG_VMNET' }" on its
own line in qapi/net.json
- add a comment in qapi/net.json about parameters usage
- move netdev_is_modern() check to qemu_init()
- in netdev_is_modern(), check for JSON and use qemu_opts_do_parse()
to parse parameters and detect type value.
- add a blank line after copyright comment
v3:
- remove support of "-net" for dgram and stream. They are only
supported with "-netdev" option.
- use &error_fatal directly in net_client_inits()
- update qemu-options.hx
- move to QIO for stream socket
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 (13):
net: introduce convert_host_port()
net: remove the @errp argument of net_client_inits()
net: simplify net_client_parse() error management
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
qemu-sockets: move and rename SocketAddress_to_str()
qemu-sockets: update socket_uri() and socket_parse() to be consistent
net: stream: move to QIO
tests/qtest: netdev: test stream and dgram backends
Stefano Brivio (1):
net: stream: Don't ignore EINVAL on netdev socket connection
hmp-commands.hx | 2 +-
include/net/net.h | 6 +-
include/qemu/sockets.h | 4 +-
monitor/hmp-cmds.c | 23 +-
net/clients.h | 6 +
net/dgram.c | 707 ++++++++++++++++++++++++++++++++++++
net/hub.c | 2 +
net/meson.build | 2 +
net/net.c | 169 ++++++---
net/stream.c | 376 +++++++++++++++++++
qapi/net.json | 63 +++-
qemu-options.hx | 14 +
softmmu/vl.c | 16 +-
tests/qtest/meson.build | 1 +
tests/qtest/netdev-socket.c | 322 ++++++++++++++++
util/qemu-sockets.c | 25 ++
16 files changed, 1656 insertions(+), 82 deletions(-)
create mode 100644 net/dgram.c
create mode 100644 net/stream.c
create mode 100644 tests/qtest/netdev-socket.c
--
2.37.1