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blockdev: convert internal NBD server to QIONetListener 

Instead of creating a QIOChannelSocket directly for the NBD
server socket, use a QIONetListener. This provides the ability
to listen on multiple sockets at the same time, so enables
full support for IPv4/IPv6 dual stack.

Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-Id: <20171218101643.20360-2-berrange@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Daniel P. Berrange 2017-12-18 10:16:42 +00:00 committed by Paolo Bonzini
parent d45f80ba82
commit 862172f45c
1 changed files with 16 additions and 34 deletions
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50
blockdev-nbd.c
View File

@ -18,10 +18,10 @@
#include "qmp-commands.h"
#include "block/nbd.h"
#include "io/channel-socket.h"
#include "io/net-listener.h"
typedef struct NBDServerData {
QIOChannelSocket *listen_ioc;
int watch;
QIONetListener *listener;
QCryptoTLSCreds *tlscreds;
} NBDServerData;
@ -32,27 +32,13 @@ static void nbd_blockdev_client_closed(NBDClient *client, bool ignored)
nbd_client_put(client);
}
static gboolean nbd_accept(QIOChannel *ioc, GIOCondition condition,
gpointer opaque)
static void nbd_accept(QIONetListener *listener, QIOChannelSocket *cioc,
gpointer opaque)
{
QIOChannelSocket *cioc;
if (!nbd_server) {
return FALSE;
}
cioc = qio_channel_socket_accept(QIO_CHANNEL_SOCKET(ioc),
NULL);
if (!cioc) {
return TRUE;
}
qio_channel_set_name(QIO_CHANNEL(cioc), "nbd-server");
nbd_client_new(NULL, cioc,
nbd_server->tlscreds, NULL,
nbd_blockdev_client_closed);
object_unref(OBJECT(cioc));
return TRUE;
}
@ -62,10 +48,8 @@ static void nbd_server_free(NBDServerData *server)
return;
}
if (server->watch != -1) {
g_source_remove(server->watch);
}
object_unref(OBJECT(server->listen_ioc));
qio_net_listener_disconnect(server->listener);
object_unref(OBJECT(server->listener));
if (server->tlscreds) {
object_unref(OBJECT(server->tlscreds));
}
@ -112,12 +96,12 @@ void nbd_server_start(SocketAddress *addr, const char *tls_creds,
}
nbd_server = g_new0(NBDServerData, 1);
nbd_server->watch = -1;
nbd_server->listen_ioc = qio_channel_socket_new();
qio_channel_set_name(QIO_CHANNEL(nbd_server->listen_ioc),
"nbd-listener");
if (qio_channel_socket_listen_sync(
nbd_server->listen_ioc, addr, errp) < 0) {
nbd_server->listener = qio_net_listener_new();
qio_net_listener_set_name(nbd_server->listener,
"nbd-listener");
if (qio_net_listener_open_sync(nbd_server->listener, addr, errp) < 0) {
goto error;
}
@ -134,12 +118,10 @@ void nbd_server_start(SocketAddress *addr, const char *tls_creds,
}
}
nbd_server->watch = qio_channel_add_watch(
QIO_CHANNEL(nbd_server->listen_ioc),
G_IO_IN,
nbd_accept,
NULL,
NULL);
qio_net_listener_set_client_func(nbd_server->listener,
nbd_accept,
NULL,
NULL);
return;