Dump: add hmp command "info dump"

It will calculate percentage of finished work from completed and
total.

Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <1455772616-8668-11-git-send-email-peterx@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

hmp-commands-info.hx

@@ -784,6 +784,20 @@ STEXI
 @item info skeys @var{address}
 @findex skeys
 Display the value of a storage key (s390 only)
+ETEXI
+
+    {
+        .name       = "dump",
+        .args_type  = "",
+        .params     = "",
+        .help       = "Display the latest dump status",
+        .mhandler.cmd = hmp_info_dump,
+    },
+
+STEXI
+@item info dump
+@findex dump
+Display the latest dump status.
 ETEXI
 
 STEXI

hmp.c

@@ -2351,3 +2351,20 @@ void hmp_rocker_of_dpa_groups(Monitor *mon, const QDict *qdict)
 
     qapi_free_RockerOfDpaGroupList(list);
 }
+
+void hmp_info_dump(Monitor *mon, const QDict *qdict)
+{
+    DumpQueryResult *result = qmp_query_dump(NULL);
+
+    assert(result && result->status < DUMP_STATUS__MAX);
+    monitor_printf(mon, "Status: %s\n", DumpStatus_lookup[result->status]);
+
+    if (result->status == DUMP_STATUS_ACTIVE) {
+        float percent = 0;
+        assert(result->total != 0);
+        percent = 100.0 * result->completed / result->total;
+        monitor_printf(mon, "Finished: %.2f %%\n", percent);
+    }
+
+    qapi_free_DumpQueryResult(result);
+}

hmp.h

@@ -131,5 +131,6 @@ void hmp_rocker(Monitor *mon, const QDict *qdict);
 void hmp_rocker_ports(Monitor *mon, const QDict *qdict);
 void hmp_rocker_of_dpa_flows(Monitor *mon, const QDict *qdict);
 void hmp_rocker_of_dpa_groups(Monitor *mon, const QDict *qdict);
+void hmp_info_dump(Monitor *mon, const QDict *qdict);
 
 #endif