[PATCH V1 07/32] savevm: QMP command for cprinfo

[Steve Sistare <steven.sistare@oracle.com>]

Provide the cprinfo QMP command.  This returns a string with a space-
separated list of modes supported by cprsave, and can be used by clients
as a feature test to check if the running QEMU instance supports cprsave.

Syntax:
  {'command':'cprinfo', 'returns':'str'}

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
---
 monitor/qmp-cmds.c  | 5 +++++
 qapi/migration.json | 9 +++++++++
 qapi/pragma.json    | 1 +
 3 files changed, 15 insertions(+)

diff --git a/monitor/qmp-cmds.c b/monitor/qmp-cmds.c
index 81e6feb..8c400e6 100644
--- a/monitor/qmp-cmds.c
+++ b/monitor/qmp-cmds.c
@@ -162,6 +162,11 @@ void qmp_cont(Error **errp)
     }
 }
 
+char *qmp_cprinfo(Error **errp)
+{
+    return g_strdup("reboot");
+}
+
 void qmp_cprsave(const char *file, const char *mode, Error **errp)
 {
     save_cpr_snapshot(file, mode, errp);
diff --git a/qapi/migration.json b/qapi/migration.json
index ce4d32b..8190b16 100644
--- a/qapi/migration.json
+++ b/qapi/migration.json
@@ -1623,6 +1623,15 @@
   'data': { 'device-id': 'str' } }
 
 ##
+# @cprinfo:
+#
+# Return a space-delimited list of modes supported by the cprsave command
+#
+# Since 5.0
+##
+{ 'command': 'cprinfo', 'returns': 'str' }
+
+##
 # @cprsave:
 #
 # Create a checkpoint of the virtual machine device state in @file.
diff --git a/qapi/pragma.json b/qapi/pragma.json
index cffae27..43bdb39 100644
--- a/qapi/pragma.json
+++ b/qapi/pragma.json
@@ -5,6 +5,7 @@
 { 'pragma': {
     # Commands allowed to return a non-dictionary:
     'returns-whitelist': [
+        'cprinfo',
         'human-monitor-command',
         'qom-get',
         'query-migrate-cache-size',
-- 
1.8.3.1