qemu-ga: separate out common commands from posix-specific ones

Many of the current RPC implementations are very much POSIX-specific
and require complete re-writes for Windows. There are however a small
set of core guest agent commands that are common to both, and other
commands such as guest-file-* which *may* be portable. So we introduce
commands.c for the latter, and will rename guest-agent-commands.c to
commands-posix.c in a future commit. Windows implementations will go in
commands-win32.c, eventually.

Makefile.objs

@@ -424,7 +424,7 @@ common-obj-y += qmp.o hmp.o
 ######################################################################
 # guest agent
 
-qga-nested-y = guest-agent-commands.o guest-agent-command-state.o
+qga-nested-y = commands.o guest-agent-commands.o guest-agent-command-state.o
 qga-nested-y += channel-posix.o
 qga-obj-y = $(addprefix qga/, $(qga-nested-y))
 qga-obj-y += qemu-ga.o qemu-sockets.o module.o qemu-option.o

qga/commands.c

@@ -0,0 +1,73 @@
+/*
+ * QEMU Guest Agent common/cross-platform command implementations
+ *
+ * Copyright IBM Corp. 2012
+ *
+ * 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 <glib.h>
+#include "qga/guest-agent-core.h"
+#include "qga-qmp-commands.h"
+#include "qerror.h"
+
+/* Note: in some situations, like with the fsfreeze, logging may be
+ * temporarilly disabled. if it is necessary that a command be able
+ * to log for accounting purposes, check ga_logging_enabled() beforehand,
+ * and use the QERR_QGA_LOGGING_DISABLED to generate an error
+ */
+void slog(const gchar *fmt, ...)
+{
+    va_list ap;
+
+    va_start(ap, fmt);
+    g_logv("syslog", G_LOG_LEVEL_INFO, fmt, ap);
+    va_end(ap);
+}
+
+int64_t qmp_guest_sync(int64_t id, Error **errp)
+{
+    return id;
+}
+
+void qmp_guest_ping(Error **err)
+{
+    slog("guest-ping called");
+}
+
+struct GuestAgentInfo *qmp_guest_info(Error **err)
+{
+    GuestAgentInfo *info = g_malloc0(sizeof(GuestAgentInfo));
+    GuestAgentCommandInfo *cmd_info;
+    GuestAgentCommandInfoList *cmd_info_list;
+    char **cmd_list_head, **cmd_list;
+
+    info->version = g_strdup(QGA_VERSION);
+
+    cmd_list_head = cmd_list = qmp_get_command_list();
+    if (*cmd_list_head == NULL) {
+        goto out;
+    }
+
+    while (*cmd_list) {
+        cmd_info = g_malloc0(sizeof(GuestAgentCommandInfo));
+        cmd_info->name = strdup(*cmd_list);
+        cmd_info->enabled = qmp_command_is_enabled(cmd_info->name);
+
+        cmd_info_list = g_malloc0(sizeof(GuestAgentCommandInfoList));
+        cmd_info_list->value = cmd_info;
+        cmd_info_list->next = info->supported_commands;
+        info->supported_commands = cmd_info_list;
+
+        g_free(*cmd_list);
+        cmd_list++;
+    }
+
+out:
+    g_free(cmd_list_head);
+    return info;
+}

qga/guest-agent-commands.c

@@ -1,5 +1,5 @@
 /*
- * QEMU Guest Agent commands
+ * QEMU Guest Agent POSIX-specific command implementations
  *
  * Copyright IBM Corp. 2011
  *
@@ -30,63 +30,6 @@
 
 static GAState *ga_state;
 
-/* Note: in some situations, like with the fsfreeze, logging may be
- * temporarilly disabled. if it is necessary that a command be able
- * to log for accounting purposes, check ga_logging_enabled() beforehand,
- * and use the QERR_QGA_LOGGING_DISABLED to generate an error
- */
-static void slog(const char *fmt, ...)
-{
-    va_list ap;
-
-    va_start(ap, fmt);
-    g_logv("syslog", G_LOG_LEVEL_INFO, fmt, ap);
-    va_end(ap);
-}
-
-int64_t qmp_guest_sync(int64_t id, Error **errp)
-{
-    return id;
-}
-
-void qmp_guest_ping(Error **err)
-{
-    slog("guest-ping called");
-}
-
-struct GuestAgentInfo *qmp_guest_info(Error **err)
-{
-    GuestAgentInfo *info = g_malloc0(sizeof(GuestAgentInfo));
-    GuestAgentCommandInfo *cmd_info;
-    GuestAgentCommandInfoList *cmd_info_list;
-    char **cmd_list_head, **cmd_list;
-
-    info->version = g_strdup(QGA_VERSION);
-
-    cmd_list_head = cmd_list = qmp_get_command_list();
-    if (*cmd_list_head == NULL) {
-        goto out;
-    }
-
-    while (*cmd_list) {
-        cmd_info = g_malloc0(sizeof(GuestAgentCommandInfo));
-        cmd_info->name = strdup(*cmd_list);
-        cmd_info->enabled = qmp_command_is_enabled(cmd_info->name);
-
-        cmd_info_list = g_malloc0(sizeof(GuestAgentCommandInfoList));
-        cmd_info_list->value = cmd_info;
-        cmd_info_list->next = info->supported_commands;
-        info->supported_commands = cmd_info_list;
-
-        g_free(*cmd_list);
-        cmd_list++;
-    }
-
-out:
-    g_free(cmd_list_head);
-    return info;
-}
-
 void qmp_guest_shutdown(bool has_mode, const char *mode, Error **err)
 {
     int ret;

qga/guest-agent-core.h

@@ -29,3 +29,4 @@ GACommandState *ga_command_state_new(void);
 bool ga_logging_enabled(GAState *s);
 void ga_disable_logging(GAState *s);
 void ga_enable_logging(GAState *s);
+void slog(const gchar *fmt, ...);