qemu: Add support for max-bandwidth migration parameter

We already support several ways of setting migration bandwidth and this
is not adding another one. With this patch we are able to read and write
this parameter using query-migrate-parameters and migrate-set-parameters
in one call with all other parameters.
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>

src/qemu/qemu_monitor.c

@@ -2607,13 +2607,14 @@ qemuMonitorSetMigrationParams(qemuMonitorPtr mon,
     VIR_DEBUG("compressLevel=%d:%d compressThreads=%d:%d "
               "decompressThreads=%d:%d cpuThrottleInitial=%d:%d "
               "cpuThrottleIncrement=%d:%d tlsCreds=%s tlsHostname=%s "
-              "downtimeLimit=%d:%llu",
+              "maxBandwidth=%d:%llu downtimeLimit=%d:%llu",
               params->compressLevel_set, params->compressLevel,
               params->compressThreads_set, params->compressThreads,
               params->decompressThreads_set, params->decompressThreads,
               params->cpuThrottleInitial_set, params->cpuThrottleInitial,
               params->cpuThrottleIncrement_set, params->cpuThrottleIncrement,
               NULLSTR(params->tlsCreds), NULLSTR(params->tlsHostname),
+              params->maxBandwidth_set, params->maxBandwidth,
               params->downtimeLimit_set, params->downtimeLimit);
 
     QEMU_CHECK_MONITOR_JSON(mon);

src/qemu/qemu_monitor.h

@@ -628,6 +628,9 @@ struct _qemuMonitorMigrationParams {
     char *tlsCreds;
     char *tlsHostname;
 
+    bool maxBandwidth_set;
+    unsigned long long maxBandwidth;
+
     bool downtimeLimit_set;
     unsigned long long downtimeLimit;
 };

src/qemu/qemu_monitor_json.c

@@ -2706,6 +2706,7 @@ qemuMonitorJSONGetMigrationParams(qemuMonitorPtr mon,
     PARSE_INT(cpuThrottleIncrement, "cpu-throttle-increment");
     PARSE_STR(tlsCreds, "tls-creds");
     PARSE_STR(tlsHostname, "tls-hostname");
+    PARSE_ULONG(maxBandwidth, "max-bandwidth");
     PARSE_ULONG(downtimeLimit, "downtime-limit");
 
 #undef PARSE_SET
@@ -2764,6 +2765,7 @@ qemuMonitorJSONSetMigrationParams(qemuMonitorPtr mon,
     APPEND_INT(cpuThrottleIncrement, "cpu-throttle-increment");
     APPEND_STR(tlsCreds, "tls-creds");
     APPEND_STR(tlsHostname, "tls-hostname");
+    APPEND_ULONG(maxBandwidth, "max-bandwidth");
     APPEND_ULONG(downtimeLimit, "downtime-limit");
 
 #undef APPEND

tests/qemumonitorjsontest.c

@@ -1804,6 +1804,7 @@ testQemuMonitorJSONqemuMonitorJSONGetMigrationParams(const void *data)
                                "        \"cpu-throttle-initial\": 20,"
                                "        \"tls-creds\": \"tls0\","
                                "        \"tls-hostname\": \"\","
+                               "        \"max-bandwidth\": 1234567890,"
                                "        \"downtime-limit\": 500"
                                "    }"
                                "}") < 0) {
@@ -1855,6 +1856,7 @@ testQemuMonitorJSONqemuMonitorJSONGetMigrationParams(const void *data)
     CHECK_INT(cpuThrottleIncrement, "cpu-throttle-increment", 10);
     CHECK_STR(tlsCreds, "tls-creds", "tls0");
     CHECK_STR(tlsHostname, "tls-hostname", "");
+    CHECK_ULONG(maxBandwidth, "max-bandwidth", 1234567890ULL);
     CHECK_ULONG(downtimeLimit, "downtime-limit", 500ULL);
 
 #undef CHECK_NUM