Add code to call the appropriate monitor command and code to lookup the
given disk backing chain member.
---
src/qemu/qemu_driver.c | 70 ++++++++++++++++++++++++++++++++++++++++++++
src/qemu/qemu_monitor.c | 13 ++++++++
src/qemu/qemu_monitor.h | 5 ++++
src/qemu/qemu_monitor_json.c | 31 ++++++++++++++++++++
src/qemu/qemu_monitor_json.h | 6 ++++
5 files changed, 125 insertions(+)
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 06bd442ee..d8e3ddf57 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -20291,6 +20291,75 @@ qemuDomainSetVcpu(virDomainPtr dom,
}
+static int
+qemuDomainSetBlockThreshold(virDomainPtr dom,
+ const char *dev,
+ unsigned long long threshold,
+ unsigned int flags)
+{
+ virQEMUDriverPtr driver = dom->conn->privateData;
+ qemuDomainObjPrivatePtr priv;
+ virDomainObjPtr vm = NULL;
+ virStorageSourcePtr src;
+ char *nodename = NULL;
+ int rc;
+ int ret = -1;
+
+ virCheckFlags(0, -1);
+
+ if (!(vm = qemuDomObjFromDomain(dom)))
+ goto cleanup;
+
+ priv = vm->privateData;
+
+ if (virDomainSetBlockThresholdEnsureACL(dom->conn, vm->def) < 0)
+ goto cleanup;
+
+ if (!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_BLOCK_WRITE_THRESHOLD)) {
+ virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
+ _("this qemu does not support setting device
threshold"));
+ goto cleanup;
+ }
+
+ if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
+ goto cleanup;
+
+ if (!virDomainObjIsActive(vm)) {
+ virReportError(VIR_ERR_OPERATION_INVALID, "%s",
+ _("domain is not running"));
+ goto endjob;
+ }
+
+ if (!(src = qemuDomainGetStorageSourceByDevstr(dev, vm->def)))
+ goto endjob;
+
+ if (!src->nodebacking) {
+ virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
+ _("threshold currently can't be set for block device
'%s'"),
+ dev);
+ goto endjob;
+ }
+
+ if (VIR_STRDUP(nodename, src->nodebacking) < 0)
+ goto endjob;
+
+ qemuDomainObjEnterMonitor(driver, vm);
+ rc = qemuMonitorSetBlockThreshold(priv->mon, nodename, threshold);
+ if (qemuDomainObjExitMonitor(driver, vm) < 0 || rc < 0)
+ goto endjob;
+
+ ret = 0;
+
+ endjob:
+ qemuDomainObjEndJob(driver, vm);
+
+ cleanup:
+ VIR_FREE(nodename);
+ virDomainObjEndAPI(&vm);
+ return ret;
+}
+
+
static virHypervisorDriver qemuHypervisorDriver = {
.name = QEMU_DRIVER_NAME,
.connectOpen = qemuConnectOpen, /* 0.2.0 */
@@ -20505,6 +20574,7 @@ static virHypervisorDriver qemuHypervisorDriver = {
.domainGetGuestVcpus = qemuDomainGetGuestVcpus, /* 2.0.0 */
.domainSetGuestVcpus = qemuDomainSetGuestVcpus, /* 2.0.0 */
.domainSetVcpu = qemuDomainSetVcpu, /* 3.1.0 */
+ .domainSetBlockThreshold = qemuDomainSetBlockThreshold /* 3.2.0 */
};
diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
index f43d79b98..e2af0ca02 100644
--- a/src/qemu/qemu_monitor.c
+++ b/src/qemu/qemu_monitor.c
@@ -4171,3 +4171,16 @@ qemuMonitorQueryQMPSchema(qemuMonitorPtr mon)
return qemuMonitorJSONQueryQMPSchema(mon);
}
+
+
+int
+qemuMonitorSetBlockThreshold(qemuMonitorPtr mon,
+ const char *nodename,
+ unsigned long long threshold)
+{
+ VIR_DEBUG("mon=%p, node='%s', threshold=%llu", mon, nodename, threshold);
+
+ QEMU_CHECK_MONITOR_JSON(mon);
+
+ return qemuMonitorJSONSetBlockThreshold(mon, nodename, threshold);
+}
diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h
index 66dcd2468..61d89a9cf 100644
--- a/src/qemu/qemu_monitor.h
+++ b/src/qemu/qemu_monitor.h
@@ -1072,4 +1072,9 @@ int qemuMonitorGetRTCTime(qemuMonitorPtr mon,
virHashTablePtr qemuMonitorQueryQMPSchema(qemuMonitorPtr mon);
+int qemuMonitorSetBlockThreshold(qemuMonitorPtr mon,
+ const char *nodename,
+ unsigned long long threshold);
+
+
#endif /* QEMU_MONITOR_H */
diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index fc33e8635..6fb2af48a 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -7487,3 +7487,34 @@ qemuMonitorJSONQueryQMPSchema(qemuMonitorPtr mon)
return ret;
}
+
+
+int
+qemuMonitorJSONSetBlockThreshold(qemuMonitorPtr mon,
+ const char *nodename,
+ unsigned long long threshold)
+{
+ virJSONValuePtr cmd;
+ virJSONValuePtr reply = NULL;
+ int ret = -1;
+
+ if (!(cmd = qemuMonitorJSONMakeCommand("block-set-write-threshold",
+ "s:node-name", nodename,
+ "U:write-threshold", threshold,
+ NULL)))
+ return -1;
+
+ if (qemuMonitorJSONCommand(mon, cmd, &reply) < 0)
+ goto cleanup;
+
+ if (qemuMonitorJSONCheckError(cmd, reply) < 0)
+ goto cleanup;
+
+ ret = 0;
+
+ cleanup:
+ virJSONValueFree(cmd);
+ virJSONValueFree(reply);
+
+ return ret;
+}
diff --git a/src/qemu/qemu_monitor_json.h b/src/qemu/qemu_monitor_json.h
index 59d9f098c..e0dd696d9 100644
--- a/src/qemu/qemu_monitor_json.h
+++ b/src/qemu/qemu_monitor_json.h
@@ -511,4 +511,10 @@ int qemuMonitorJSONGetHotpluggableCPUs(qemuMonitorPtr mon,
virHashTablePtr qemuMonitorJSONQueryQMPSchema(qemuMonitorPtr mon)
ATTRIBUTE_NONNULL(1);
+
+int qemuMonitorJSONSetBlockThreshold(qemuMonitorPtr mon,
+ const char *nodename,
+ unsigned long long threshold)
+ ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
+
#endif /* QEMU_MONITOR_JSON_H */
--
2.12.0
--
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