Re: [libvirt] [PATCH v4 08/13] Implement keepalive protocol in remote driver

--- Notes: ACKed Version 4: - no changes Version 3: - remoteStartKeepAlive renamed as remoteSetKeepAlive - clients that implement event loop are required to run it, thus keepalive is enabled if event loop implementation is found without the need to call remoteAllowKeepAlive (which was dropped) - keepalive support is advertised to a server implicitly by asking for keepalive support between authentication and virConnectOpen Version 2: - no changes src/remote/remote_driver.c | 52 +++++++++++++++++++++++++++ src/rpc/virnetclient.c | 83 +++++++++++++++++++++++++++++++++++++++++-- src/rpc/virnetclient.h | 5 +++ 3 files changed, 136 insertions(+), 4 deletions(-)

@@ -663,6 +665,26 @@ doRemoteOpen (virConnectPtr conn, if (remoteAuthenticate(conn, priv, auth, authtype) == -1) goto failed; + if (virNetClientKeepAliveIsSupported(priv->client)) { + remote_supports_feature_args args = + { VIR_DRV_FEATURE_PROGRAM_KEEPALIVE }; + remote_supports_feature_ret ret = { 0 }; + int rc; + + rc = call(conn, priv, 0, REMOTE_PROC_SUPPORTS_FEATURE, + (xdrproc_t)xdr_remote_supports_feature_args, (char *) &args, + (xdrproc_t)xdr_remote_supports_feature_ret, (char *) &ret); + if (rc == -1) + goto failed; + + if (ret.supported) { + priv->serverKeepAlive = true; + } else { + VIR_WARN("Disabling keepalive protocol since it is not supported" + " by the server");