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qapi: Convert simple union SocketAddressLegacy to flat one

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Simple unions predate flat unions.  Having both complicates the QAPI
schema language and the QAPI generator.  We haven't been using simple
unions in new code for a long time, because they are less flexible and
somewhat awkward on the wire.

To prepare for their removal, convert simple union SocketAddressLegacy
to an equivalent flat one, with existing enum SocketAddressType
replacing implicit enum type SocketAddressLegacyKind.  Adds some
boilerplate to the schema, which is a bit ugly, but a lot easier to
maintain than the simple union feature.

Cc: "Daniel P. Berrangé" <berrange@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20210917143134.412106-9-armbru@redhat.com>
This commit is contained in:
Markus Armbruster 2021-09-17 16:31:19 +02:00
parent 3218c0e91c
commit 935a867c87
5 changed files with 51 additions and 19 deletions
Download patch file Download diff file Expand all files Collapse all files

8
util/qemu-sockets.c
View file

@ -1455,22 +1455,22 @@ SocketAddress *socket_address_flatten(SocketAddressLegacy *addr_legacy)
addr = g_new(SocketAddress, 1);
switch (addr_legacy->type) {
case SOCKET_ADDRESS_LEGACY_KIND_INET:
case SOCKET_ADDRESS_TYPE_INET:
addr->type = SOCKET_ADDRESS_TYPE_INET;
QAPI_CLONE_MEMBERS(InetSocketAddress, &addr->u.inet,
addr_legacy->u.inet.data);
break;
case SOCKET_ADDRESS_LEGACY_KIND_UNIX:
case SOCKET_ADDRESS_TYPE_UNIX:
addr->type = SOCKET_ADDRESS_TYPE_UNIX;
QAPI_CLONE_MEMBERS(UnixSocketAddress, &addr->u.q_unix,
addr_legacy->u.q_unix.data);
break;
case SOCKET_ADDRESS_LEGACY_KIND_VSOCK:
case SOCKET_ADDRESS_TYPE_VSOCK:
addr->type = SOCKET_ADDRESS_TYPE_VSOCK;
QAPI_CLONE_MEMBERS(VsockSocketAddress, &addr->u.vsock,
addr_legacy->u.vsock.data);
break;
case SOCKET_ADDRESS_LEGACY_KIND_FD:
case SOCKET_ADDRESS_TYPE_FD:
addr->type = SOCKET_ADDRESS_TYPE_FD;
QAPI_CLONE_MEMBERS(String, &addr->u.fd, addr_legacy->u.fd.data);
break;