8:05 a.m.
This patch implements the VIR_DOMAIN_STATS_BALLOON
group of statistics.
Signed-off-by: Francesco Romani <fromani(a)redhat.com>
---
include/libvirt/libvirt.h.in | 1 +
src/libvirt.c | 6 ++++
src/qemu/qemu_driver.c | 70 ++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 77 insertions(+)
diff --git a/include/libvirt/libvirt.h.in b/include/libvirt/libvirt.h.in
index e6ed803..1e4e428 100644
--- a/include/libvirt/libvirt.h.in
+++ b/include/libvirt/libvirt.h.in
@@ -2512,6 +2512,7 @@ struct _virDomainStatsRecord {
typedef enum {
VIR_DOMAIN_STATS_STATE = (1 << 0), /* return domain state */
VIR_DOMAIN_STATS_CPU_TOTAL = (1 << 1), /* return domain CPU info */
+ VIR_DOMAIN_STATS_BALLOON = (1 << 2), /* return domain balloon info */
} virDomainStatsTypes;
typedef enum {
diff --git a/src/libvirt.c b/src/libvirt.c
index 4d504ff..f21eb39 100644
--- a/src/libvirt.c
+++ b/src/libvirt.c
@@ -21562,6 +21562,12 @@ virConnectGetDomainCapabilities(virConnectPtr conn,
* "cpu.user" - user cpu time spent as unsigned long long.
* "cpu.system" - system cpu time spent as unsigned long long.
*
+ * VIR_DOMAIN_STATS_BALLOON: Return memory balloon device information.
+ * The typed parameter keys are in this format:
+ * "balloon.current" - the memory in kiB currently used
+ * as unsigned long long.
+ * "balloon.maximum" - the maximum memory in kiB allowed
+ * as unsigned long long.
*
* Using 0 for @stats returns all stats groups supported by the given
* hypervisor.
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index cfc5941..4f8ccac 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -2520,6 +2520,47 @@ static int qemuDomainSendKey(virDomainPtr domain,
return ret;
}
+
+/*
+ * FIXME: this code is a stripped down version of what is done into
+ * qemuDomainGetInfo. Due to the different handling of jobs, it is not
+ * trivial to extract a common helper function.
+ */
+static void
+qemuDomainGetBalloonMemory(virQEMUDriverPtr driver, virDomainObjPtr vm,
+ unsigned long *memory)
+{
+ qemuDomainObjPrivatePtr priv = vm->privateData;
+
+ if (vm->def->memballoon &&
+ vm->def->memballoon->model == VIR_DOMAIN_MEMBALLOON_MODEL_NONE) {
+ *memory = vm->def->mem.max_balloon;
+ } else if (virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_BALLOON_EVENT)) {
+ *memory = vm->def->mem.cur_balloon;
+ } else {
+ int err;
+ unsigned long long balloon;
+
+ qemuDomainObjEnterMonitor(driver, vm);
+ err = qemuMonitorGetBalloonInfo(priv->mon, &balloon);
+ qemuDomainObjExitMonitor(driver, vm);
+
+ if (err < 0) {
+ /* We couldn't get current memory allocation but that's not
+ * a show stopper; we wouldn't get it if there was a job
+ * active either
+ */
+ *memory = vm->def->mem.cur_balloon;
+ } else if (err == 0) {
+ /* Balloon not supported, so maxmem is always the allocation */
+ *memory = vm->def->mem.max_balloon;
+ } else {
+ *memory = balloon;
+ }
+ }
+}
+
+
static int qemuDomainGetInfo(virDomainPtr dom,
virDomainInfoPtr info)
{
@@ -17387,6 +17428,34 @@ qemuDomainGetStatsCpu(virConnectPtr conn ATTRIBUTE_UNUSED,
return 0;
}
+static int
+qemuDomainGetStatsBalloon(virConnectPtr conn,
+ virDomainObjPtr dom,
+ virDomainStatsRecordPtr record,
+ int *maxparams,
+ unsigned int privflags ATTRIBUTE_UNUSED)
+{
+ virQEMUDriverPtr driver = conn->privateData;
+ unsigned long cur_balloon = 0;
+
+ qemuDomainGetBalloonMemory(driver, dom, &cur_balloon);
+
+ if (virTypedParamsAddULLong(&record->params,
+ &record->nparams,
+ maxparams,
+ "balloon.current",
+ cur_balloon) < 0)
+ return -1;
+
+ if (virTypedParamsAddULLong(&record->params,
+ &record->nparams,
+ maxparams,
+ "balloon.maximum",
+ dom->def->mem.max_balloon) < 0)
+ return -1;
+
+ return 0;
+}
typedef int
(*qemuDomainGetStatsFunc)(virConnectPtr conn,
@@ -17404,6 +17473,7 @@ struct qemuDomainGetStatsWorker {
static struct qemuDomainGetStatsWorker qemuDomainGetStatsWorkers[] = {
{ qemuDomainGetStatsState, VIR_DOMAIN_STATS_STATE, false },
{ qemuDomainGetStatsCpu, VIR_DOMAIN_STATS_CPU_TOTAL, false },
+ { qemuDomainGetStatsBalloon, VIR_DOMAIN_STATS_BALLOON, true },
{ NULL, 0, false }
};
--
1.9.3