Basic skeleton code for RPC server. This is shared by both the
guest-side RPC server as well as the host-side one (the advertised RPCs
for each by guest/host-specific arrays).
Signed-off-by: Michael Roth <mdr...@linux.vnet.ibm.com>
---
virtagent-daemon.c | 194 ++++++++++++++++++++++++++++++++++++++++++++++++++++
virtagent-daemon.h | 22 ++++++
2 files changed, 216 insertions(+), 0 deletions(-)
create mode 100644 virtagent-daemon.c
create mode 100644 virtagent-daemon.h
diff --git a/virtagent-daemon.c b/virtagent-daemon.c
new file mode 100644
index 0000000..0505a81
--- /dev/null
+++ b/virtagent-daemon.c
@@ -0,0 +1,194 @@
+/*
+ * virt-agent - host/guest RPC daemon functions
+ *
+ * Copyright IBM Corp. 2010
+ *
+ * Authors:
+ * Adam Litke <agli...@linux.vnet.ibm.com>
+ * Michael Roth <mdr...@linux.vnet.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+#include "qemu_socket.h"
+#include "virtagent-daemon.h"
+#include "virtagent-common.h"
+
+static int va_accept(int listen_fd) {
+ struct sockaddr_in saddr;
+ struct sockaddr *addr;
+ socklen_t len;
+ int fd;
+
+ while (1) {
+ len = sizeof(saddr);
+ addr = (struct sockaddr *)&saddr;
+ fd = qemu_accept(listen_fd, addr, &len);
+ if (fd < 0 && errno != EINTR) {
+ LOG("accept() failed");
+ break;
+ } else if (fd >= 0) {
+ TRACE("accepted connection");
+ break;
+ }
+ }
+ return fd;
+}
+
+typedef struct RPCFunction {
+ xmlrpc_value *(*func)(xmlrpc_env *env, xmlrpc_value *param, void *unused);
+ const char *func_name;
+} RPCFunction;
+
+static RPCFunction guest_functions[] = {
+ { NULL, NULL }
+};
+static RPCFunction host_functions[] = {
+ { NULL, NULL }
+};
+
+static void va_register_functions(xmlrpc_env *env, xmlrpc_registry *registry,
+ RPCFunction *list)
+{
+ int i;
+ for (i = 0; list[i].func != NULL; ++i) {
+ TRACE("adding func: %s", list[i].func_name);
+ xmlrpc_registry_add_method(env, registry, NULL, list[i].func_name,
+ list[i].func, NULL);
+ }
+}
+
+typedef struct VARPCServerState {
+ VPDriver *vp;
+ int listen_fd;
+ xmlrpc_env env;
+ xmlrpc_registry *registry;
+} VARPCServerState;
+
+/* only one virtagent server instance can exist at a time */
+static VARPCServerState *server_state = NULL;
+
+static void va_accept_handler(void *opaque);
+
+static void va_rpc_send_cb(void *opaque)
+{
+ VARPCData *rpc_data = opaque;
+ VARPCServerState *s = server_state;
+
+ TRACE("called");
+ if (rpc_data->status != VA_RPC_STATUS_OK) {
+ LOG("error sending RPC response");
+ } else {
+ TRACE("RPC completed");
+ }
+
+ TRACE("waiting for RPC request...");
+ vp_set_fd_handler(s->listen_fd, va_accept_handler, NULL, s);
+}
+
+static void va_rpc_read_cb(void *opaque)
+{
+ VARPCData *rpc_data = opaque;
+ VARPCServerState *s = server_state;
+
+ TRACE("called");
+ if (rpc_data->status != VA_RPC_STATUS_OK) {
+ LOG("error reading RPC request");
+ goto out_bad;
+ }
+
+ rpc_data->send_resp_xml =
+ xmlrpc_registry_process_call(&s->env, s->registry, NULL,
+ rpc_data->req_xml, rpc_data->req_xml_len);
+ if (rpc_data->send_resp_xml == NULL) {
+ LOG("error handling RPC request");
+ goto out_bad;
+ }
+
+ rpc_data->cb = va_rpc_send_cb;
+ return;
+
+out_bad:
+ TRACE("waiting for RPC request...");
+ vp_set_fd_handler(s->listen_fd, va_accept_handler, NULL, s);
+}
+
+static void va_accept_handler(void *opaque)
+{
+ VARPCData *rpc_data;
+ int ret, fd;
+
+ TRACE("called");
+ fd = va_accept(server_state->listen_fd);
+ if (fd < 0) {
+ TRACE("connection error: %s", strerror(errno));
+ return;
+ }
+ ret = fcntl(fd, F_GETFL);
+ ret = fcntl(fd, F_SETFL, ret | O_NONBLOCK);
+
+ TRACE("RPC client connected, reading RPC request...");
+ rpc_data = qemu_mallocz(sizeof(VARPCData));
+ rpc_data->cb = va_rpc_read_cb;
+ ret = va_rpc_read_request(rpc_data, fd);
+ if (ret != 0) {
+ LOG("error setting up read handler");
+ qemu_free(rpc_data);
+ return;
+ }
+ vp_set_fd_handler(server_state->listen_fd, NULL, NULL, NULL);
+}
+
+int va_server_init(VPDriver *vp_drv, bool is_host)
+{
+ RPCFunction *func_list = is_host ? host_functions : guest_functions;
+ QemuOpts *opts;
+ int ret, fd;
+ const char *path, *service_id;
+
+ if (server_state) {
+ LOG("virtagent server already initialized");
+ return -1;
+ }
+ server_state = qemu_mallocz(sizeof(VARPCServerState));
+ service_id = is_host ? HOST_AGENT_SERVICE_ID : GUEST_AGENT_SERVICE_ID;
+ /* TODO: host agent path needs to be made unique amongst multiple
+ * qemu instances
+ */
+ path = is_host ? HOST_AGENT_PATH : GUEST_AGENT_PATH;
+
+ /* setup listening socket for server */
+ opts = qemu_opts_create(qemu_find_opts("net"), "va_server_opts", 0);
+ qemu_opt_set(opts, "path", path);
+ fd = unix_listen_opts(opts);
+ qemu_opts_del(opts);
+ if (fd < 0) {
+ LOG("error setting up listening socket");
+ goto out_bad;
+ }
+
+ /* tell virtproxy to forward incoming virtagent connections to the socket
*/
+ ret = vp_set_iforward(vp_drv, service_id, path, NULL, false);
+ if (ret < 0) {
+ LOG("error setting up virtproxy iforward");
+ goto out_bad;
+ }
+
+ server_state->vp = vp_drv;
+ server_state->listen_fd = fd;
+ xmlrpc_env_init(&server_state->env);
+ server_state->registry = xmlrpc_registry_new(&server_state->env);
+ va_register_functions(&server_state->env, server_state->registry,
func_list);
+
+ TRACE("waiting for RPC request...");
+ vp_set_fd_handler(server_state->listen_fd, va_accept_handler, NULL,
+ server_state);
+
+ return 0;
+
+out_bad:
+ qemu_free(server_state);
+ server_state = NULL;
+ return -1;
+}
diff --git a/virtagent-daemon.h b/virtagent-daemon.h
new file mode 100644
index 0000000..6c3436a
--- /dev/null
+++ b/virtagent-daemon.h
@@ -0,0 +1,22 @@
+/*
+ * virt-agent - host/guest RPC daemon functions
+ *
+ * Copyright IBM Corp. 2010
+ *
+ * Authors:
+ * Michael Roth <mdr...@linux.vnet.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+#include "virtproxy.h"
+
+#define GUEST_AGENT_SERVICE_ID "virtagent"
+#define GUEST_AGENT_PATH "/tmp/virtagent-guest.sock"
+#define HOST_AGENT_SERVICE_ID "virtagent-host"
+#define HOST_AGENT_PATH "/tmp/virtagent-host.sock"
+#define VA_GETFILE_MAX 1 << 30
+#define VA_FILEBUF_LEN 16384
+
+int va_server_init(VPDriver *vp_drv, bool is_host);
--
1.7.0.4
