monitor: Collect "control" command handlers in qmp-cmds.control.c

Move all of the QMP commands handlers to implement the 'control' module
(qapi/control.json) that can be shared between the system emulator and
tools such as a storage daemon to a new file monitor/qmp-cmds-control.c.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20200129102239.31435-4-kwolf@redhat.com>
[Commit message tweaked]
Signed-off-by: Markus Armbruster <armbru@redhat.com>

monitor/Makefile.objs

@@ -1,3 +1,4 @@
 obj-y += misc.o
 common-obj-y += monitor.o qmp.o hmp.o
-common-obj-y += qmp-cmds.o hmp-cmds.o
+common-obj-y += qmp-cmds.o qmp-cmds-control.o
+common-obj-y += hmp-cmds.o

monitor/misc.c

@@ -72,7 +72,6 @@
 #include "qapi/qapi-commands-misc.h"
 #include "qapi/qapi-commands-qom.h"
 #include "qapi/qapi-commands-trace.h"
-#include "qapi/qapi-emit-events.h"
 #include "qapi/qapi-init-commands.h"
 #include "qapi/error.h"
 #include "qapi/qmp-event.h"
@@ -233,58 +232,6 @@ static void hmp_info_help(Monitor *mon, const QDict *qdict)
     help_cmd(mon, "info");
 }
 
-static void query_commands_cb(QmpCommand *cmd, void *opaque)
-{
-    CommandInfoList *info, **list = opaque;
-
-    if (!cmd->enabled) {
-        return;
-    }
-
-    info = g_malloc0(sizeof(*info));
-    info->value = g_malloc0(sizeof(*info->value));
-    info->value->name = g_strdup(cmd->name);
-    info->next = *list;
-    *list = info;
-}
-
-CommandInfoList *qmp_query_commands(Error **errp)
-{
-    CommandInfoList *list = NULL;
-    MonitorQMP *mon;
-
-    assert(monitor_is_qmp(cur_mon));
-    mon = container_of(cur_mon, MonitorQMP, common);
-
-    qmp_for_each_command(mon->commands, query_commands_cb, &list);
-
-    return list;
-}
-
-EventInfoList *qmp_query_events(Error **errp)
-{
-    /*
-     * TODO This deprecated command is the only user of
-     * QAPIEvent_str() and QAPIEvent_lookup[].  When the command goes,
-     * they should go, too.
-     */
-    EventInfoList *info, *ev_list = NULL;
-    QAPIEvent e;
-
-    for (e = 0 ; e < QAPI_EVENT__MAX ; e++) {
-        const char *event_name = QAPIEvent_str(e);
-        assert(event_name != NULL);
-        info = g_malloc0(sizeof(*info));
-        info->value = g_malloc0(sizeof(*info->value));
-        info->value->name = g_strdup(event_name);
-
-        info->next = ev_list;
-        ev_list = info;
-    }
-
-    return ev_list;
-}
-
 /*
  * Minor hack: generated marshalling suppressed for this command
  * ('gen': false in the schema) so we can parse the JSON string
@@ -323,63 +270,6 @@ static void monitor_init_qmp_commands(void)
                          qmp_marshal_qmp_capabilities, QCO_ALLOW_PRECONFIG);
 }
 
-/*
- * Accept QMP capabilities in @list for @mon.
- * On success, set mon->qmp.capab[], and return true.
- * On error, set @errp, and return false.
- */
-static bool qmp_caps_accept(MonitorQMP *mon, QMPCapabilityList *list,
-                            Error **errp)
-{
-    GString *unavailable = NULL;
-    bool capab[QMP_CAPABILITY__MAX];
-
-    memset(capab, 0, sizeof(capab));
-
-    for (; list; list = list->next) {
-        if (!mon->capab_offered[list->value]) {
-            if (!unavailable) {
-                unavailable = g_string_new(QMPCapability_str(list->value));
-            } else {
-                g_string_append_printf(unavailable, ", %s",
-                                      QMPCapability_str(list->value));
-            }
-        }
-        capab[list->value] = true;
-    }
-
-    if (unavailable) {
-        error_setg(errp, "Capability %s not available", unavailable->str);
-        g_string_free(unavailable, true);
-        return false;
-    }
-
-    memcpy(mon->capab, capab, sizeof(capab));
-    return true;
-}
-
-void qmp_qmp_capabilities(bool has_enable, QMPCapabilityList *enable,
-                          Error **errp)
-{
-    MonitorQMP *mon;
-
-    assert(monitor_is_qmp(cur_mon));
-    mon = container_of(cur_mon, MonitorQMP, common);
-
-    if (mon->commands == &qmp_commands) {
-        error_set(errp, ERROR_CLASS_COMMAND_NOT_FOUND,
-                  "Capabilities negotiation is already complete, command "
-                  "ignored");
-        return;
-    }
-
-    if (!qmp_caps_accept(mon, enable, errp)) {
-        return;
-    }
-
-    mon->commands = &qmp_commands;
-}
-
 /* Set the current CPU defined by the user. Callers must hold BQL. */
 int monitor_set_cpu(int cpu_index)
 {

monitor/qmp-cmds-control.c

@@ -0,0 +1,153 @@
+/*
+ * QMP commands related to the monitor (common to sysemu and tools)
+ *
+ * Copyright (c) 2003-2004 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "qemu/osdep.h"
+
+#include "monitor-internal.h"
+#include "qemu-version.h"
+#include "qapi/error.h"
+#include "qapi/qapi-commands-control.h"
+#include "qapi/qapi-emit-events.h"
+
+/*
+ * Accept QMP capabilities in @list for @mon.
+ * On success, set mon->qmp.capab[], and return true.
+ * On error, set @errp, and return false.
+ */
+static bool qmp_caps_accept(MonitorQMP *mon, QMPCapabilityList *list,
+                            Error **errp)
+{
+    GString *unavailable = NULL;
+    bool capab[QMP_CAPABILITY__MAX];
+
+    memset(capab, 0, sizeof(capab));
+
+    for (; list; list = list->next) {
+        if (!mon->capab_offered[list->value]) {
+            if (!unavailable) {
+                unavailable = g_string_new(QMPCapability_str(list->value));
+            } else {
+                g_string_append_printf(unavailable, ", %s",
+                                      QMPCapability_str(list->value));
+            }
+        }
+        capab[list->value] = true;
+    }
+
+    if (unavailable) {
+        error_setg(errp, "Capability %s not available", unavailable->str);
+        g_string_free(unavailable, true);
+        return false;
+    }
+
+    memcpy(mon->capab, capab, sizeof(capab));
+    return true;
+}
+
+void qmp_qmp_capabilities(bool has_enable, QMPCapabilityList *enable,
+                          Error **errp)
+{
+    MonitorQMP *mon;
+
+    assert(monitor_is_qmp(cur_mon));
+    mon = container_of(cur_mon, MonitorQMP, common);
+
+    if (mon->commands == &qmp_commands) {
+        error_set(errp, ERROR_CLASS_COMMAND_NOT_FOUND,
+                  "Capabilities negotiation is already complete, command "
+                  "ignored");
+        return;
+    }
+
+    if (!qmp_caps_accept(mon, enable, errp)) {
+        return;
+    }
+
+    mon->commands = &qmp_commands;
+}
+
+VersionInfo *qmp_query_version(Error **errp)
+{
+    VersionInfo *info = g_new0(VersionInfo, 1);
+
+    info->qemu = g_new0(VersionTriple, 1);
+    info->qemu->major = QEMU_VERSION_MAJOR;
+    info->qemu->minor = QEMU_VERSION_MINOR;
+    info->qemu->micro = QEMU_VERSION_MICRO;
+    info->package = g_strdup(QEMU_PKGVERSION);
+
+    return info;
+}
+
+static void query_commands_cb(QmpCommand *cmd, void *opaque)
+{
+    CommandInfoList *info, **list = opaque;
+
+    if (!cmd->enabled) {
+        return;
+    }
+
+    info = g_malloc0(sizeof(*info));
+    info->value = g_malloc0(sizeof(*info->value));
+    info->value->name = g_strdup(cmd->name);
+    info->next = *list;
+    *list = info;
+}
+
+CommandInfoList *qmp_query_commands(Error **errp)
+{
+    CommandInfoList *list = NULL;
+    MonitorQMP *mon;
+
+    assert(monitor_is_qmp(cur_mon));
+    mon = container_of(cur_mon, MonitorQMP, common);
+
+    qmp_for_each_command(mon->commands, query_commands_cb, &list);
+
+    return list;
+}
+
+EventInfoList *qmp_query_events(Error **errp)
+{
+    /*
+     * TODO This deprecated command is the only user of
+     * QAPIEvent_str() and QAPIEvent_lookup[].  When the command goes,
+     * they should go, too.
+     */
+    EventInfoList *info, *ev_list = NULL;
+    QAPIEvent e;
+
+    for (e = 0 ; e < QAPI_EVENT__MAX ; e++) {
+        const char *event_name = QAPIEvent_str(e);
+        assert(event_name != NULL);
+        info = g_malloc0(sizeof(*info));
+        info->value = g_malloc0(sizeof(*info->value));
+        info->value->name = g_strdup(event_name);
+
+        info->next = ev_list;
+        ev_list = info;
+    }
+
+    return ev_list;
+}

monitor/qmp-cmds.c

@@ -15,7 +15,6 @@
 
 #include "qemu/osdep.h"
 #include "qemu-common.h"
-#include "qemu-version.h"
 #include "qemu/cutils.h"
 #include "qemu/option.h"
 #include "monitor/monitor.h"
@@ -52,19 +51,6 @@ NameInfo *qmp_query_name(Error **errp)
     return info;
 }
 
-VersionInfo *qmp_query_version(Error **errp)
-{
-    VersionInfo *info = g_new0(VersionInfo, 1);
-
-    info->qemu = g_new0(VersionTriple, 1);
-    info->qemu->major = QEMU_VERSION_MAJOR;
-    info->qemu->minor = QEMU_VERSION_MINOR;
-    info->qemu->micro = QEMU_VERSION_MICRO;
-    info->package = g_strdup(QEMU_PKGVERSION);
-
-    return info;
-}
-
 KvmInfo *qmp_query_kvm(Error **errp)
 {
     KvmInfo *info = g_malloc0(sizeof(*info));