[Qemu-devel] [RFC][PATCH v6 07/23] virtagent: base server definitions

[Michael Roth <mdroth@linux.vnet.ibm.com>]

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
 virtagent-server.c |  111 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 virtagent-server.h |   34 ++++++++++++++++
 2 files changed, 145 insertions(+), 0 deletions(-)
 create mode 100644 virtagent-server.c
 create mode 100644 virtagent-server.h

diff --git a/virtagent-server.c b/virtagent-server.c
new file mode 100644
index 0000000..c38a9e0
--- /dev/null
+++ b/virtagent-server.c
@@ -0,0 +1,111 @@
+/*
+ * virtagent - host/guest RPC server functions
+ *
+ * Copyright IBM Corp. 2010
+ *
+ * Authors:
+ *  Adam Litke        <aglitke@linux.vnet.ibm.com>
+ *  Michael Roth      <mdroth@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 <syslog.h>
+#include "qemu_socket.h"
+#include "virtagent-common.h"
+
+static bool va_enable_syslog = false; /* enable syslog'ing of RPCs */
+
+#define SLOG(msg, ...) do { \
+    char msg_buf[1024]; \
+    if (!va_enable_syslog) { \
+        break; \
+    } \
+    snprintf(msg_buf, 1024, msg, ## __VA_ARGS__); \
+    syslog(LOG_INFO, "virtagent, %s", msg_buf); \
+} while(0)
+
+static VAServerData *va_server_data;
+
+static bool va_server_is_enabled(void)
+{
+    return va_server_data && va_server_data->enabled;
+}
+
+int va_do_server_rpc(const char *content, size_t content_len, const char *tag)
+{
+    xmlrpc_mem_block *resp_xml;
+    int ret;
+
+    TRACE("called");
+
+    if (!va_server_is_enabled()) {
+        ret = -EBUSY;
+        goto out;
+    }
+    resp_xml = xmlrpc_registry_process_call(&va_server_data->env,
+                                            va_server_data->registry,
+                                            NULL, content, content_len);
+    if (resp_xml == NULL) {
+        LOG("error processing RPC request");
+        ret = -EINVAL;
+        goto out;
+    }
+
+    ret = va_server_job_add(resp_xml, tag);
+    if (ret != 0) {
+        LOG("error adding server job: %s", strerror(ret));
+    }
+
+out:
+    return ret;
+}
+
+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);
+    }
+}
+
+int va_server_init(VAServerData *server_data, bool is_host)
+{
+    RPCFunction *func_list = is_host ? host_functions : guest_functions;
+
+    va_enable_syslog = !is_host; /* enable logging for guest agent */
+    xmlrpc_env_init(&server_data->env);
+    server_data->registry = xmlrpc_registry_new(&server_data->env);
+    va_register_functions(&server_data->env, server_data->registry, func_list);
+    server_data->enabled = true;
+    server_data->is_host = true;
+    va_server_data = server_data;
+
+    return 0;
+}
+
+int va_server_close(void)
+{
+    if (va_server_data != NULL) {
+        xmlrpc_registry_free(va_server_data->registry);
+        xmlrpc_env_clean(&va_server_data->env);
+        va_server_data = NULL;
+    }
+    return 0;
+}
diff --git a/virtagent-server.h b/virtagent-server.h
new file mode 100644
index 0000000..9f68921
--- /dev/null
+++ b/virtagent-server.h
@@ -0,0 +1,34 @@
+/*
+ * virt-agent - host/guest RPC daemon functions
+ *
+ * Copyright IBM Corp. 2010
+ *
+ * Authors:
+ *  Michael Roth      <mdroth@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 <xmlrpc-c/base.h>
+#include <xmlrpc-c/server.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
+#define VA_DMESG_LEN 16384
+
+typedef struct VAServerData {
+    xmlrpc_env env;
+    xmlrpc_registry *registry;
+    bool enabled;
+    bool is_host;
+} VAServerData;
+
+int va_server_init(VAServerData *server_data, bool is_host);
+int va_server_close(void);
+int va_do_server_rpc(const char *content, size_t content_len, const char tag[64]);
-- 
1.7.0.4