6:55 p.m.
Add new API in order to set the balloon memory driver statistics collection
period in order to allow dynamic period adjustment for the virsh dommemstats to
display balloon stats data
---
include/libvirt/libvirt.h.in | 3 +++
src/driver.h | 6 +++++
src/libvirt.c | 64 ++++++++++++++++++++++++++++++++++++++++++++
src/libvirt_public.syms | 5 ++++
4 files changed, 78 insertions(+)
diff --git a/include/libvirt/libvirt.h.in b/include/libvirt/libvirt.h.in
index b87255a..32c36f1 100644
--- a/include/libvirt/libvirt.h.in
+++ b/include/libvirt/libvirt.h.in
@@ -1909,6 +1909,9 @@ int virDomainSetMemory (virDomainPtr
domain,
int virDomainSetMemoryFlags (virDomainPtr domain,
unsigned long memory,
unsigned int flags);
+int virDomainSetMemoryStatsPeriod (virDomainPtr domain,
+ int period,
+ unsigned int flags);
int virDomainGetMaxVcpus (virDomainPtr domain);
int virDomainGetSecurityLabel (virDomainPtr domain,
virSecurityLabelPtr seclabel);
diff --git a/src/driver.h b/src/driver.h
index 31851cb..da03021 100644
--- a/src/driver.h
+++ b/src/driver.h
@@ -207,6 +207,11 @@ typedef int
unsigned int flags);
typedef int
+(*virDrvDomainSetMemoryStatsPeriod)(virDomainPtr domain,
+ int period,
+ unsigned int flags);
+
+typedef int
(*virDrvDomainSetMemoryParameters)(virDomainPtr domain,
virTypedParameterPtr params,
int nparams,
@@ -1158,6 +1163,7 @@ struct _virDriver {
virDrvDomainSetMaxMemory domainSetMaxMemory;
virDrvDomainSetMemory domainSetMemory;
virDrvDomainSetMemoryFlags domainSetMemoryFlags;
+ virDrvDomainSetMemoryStatsPeriod domainSetMemoryStatsPeriod;
virDrvDomainSetMemoryParameters domainSetMemoryParameters;
virDrvDomainGetMemoryParameters domainGetMemoryParameters;
virDrvDomainSetNumaParameters domainSetNumaParameters;
diff --git a/src/libvirt.c b/src/libvirt.c
index 4dc91d7..0cdac0d 100644
--- a/src/libvirt.c
+++ b/src/libvirt.c
@@ -3781,6 +3781,70 @@ error:
return -1;
}
+/**
+ * virDomainSetMemoryStatsPeriod:
+ * @domain: a domain object or NULL
+ * @period: the period in seconds for stats collection
+ * @flags: bitwise-OR of virDomainMemoryModFlags
+ *
+ * Dynamically change the domain memory balloon driver statistics collection
+ * period. Use 0 to disable and a positive value to enable.
+ *
+ * @flags may include VIR_DOMAIN_AFFECT_LIVE or VIR_DOMAIN_AFFECT_CONFIG.
+ * Both flags may be set. If VIR_DOMAIN_AFFECT_LIVE is set, the change affects
+ * a running domain and will fail if domain is not active.
+ * If VIR_DOMAIN_AFFECT_CONFIG is set, the change affects persistent state,
+ * and will fail for transient domains. If neither flag is specified
+ * (that is, @flags is VIR_DOMAIN_AFFECT_CURRENT), then an inactive domain
+ * modifies persistent setup, while an active domain is hypervisor-dependent
+ * on whether just live or both live and persistent state is changed.
+ *
+ * Not all hypervisors can support all flag combinations.
+ *
+ * Returns 0 in case of success, -1 in case of failure.
+ */
+
+int
+virDomainSetMemoryStatsPeriod(virDomainPtr domain, int period,
+ unsigned int flags)
+{
+ virConnectPtr conn;
+
+ VIR_DOMAIN_DEBUG(domain, "peroid=%d, flags=%x", period, flags);
+
+ virResetLastError();
+
+ if (!VIR_IS_CONNECTED_DOMAIN(domain)) {
+ virLibDomainError(VIR_ERR_INVALID_DOMAIN, __FUNCTION__);
+ virDispatchError(NULL);
+ return -1;
+ }
+
+ if (domain->conn->flags & VIR_CONNECT_RO) {
+ virLibDomainError(VIR_ERR_OPERATION_DENIED, __FUNCTION__);
+ goto error;
+ }
+
+ /* This must be positive to set the balloon collection period */
+ virCheckNonNegativeArgGoto(period, error);
+
+ conn = domain->conn;
+
+ if (conn->driver->domainSetMemoryStatsPeriod) {
+ int ret;
+ ret = conn->driver->domainSetMemoryStatsPeriod(domain, period, flags);
+ if (ret < 0)
+ goto error;
+ return ret;
+ }
+
+ virLibConnError(VIR_ERR_NO_SUPPORT, __FUNCTION__);
+
+error:
+ virDispatchError(domain->conn);
+ return -1;
+}
+
/* Helper function called to validate incoming client array on any
* interface that sets typed parameters in the hypervisor. */
static int
diff --git a/src/libvirt_public.syms b/src/libvirt_public.syms
index 7c6edf6..4be5104 100644
--- a/src/libvirt_public.syms
+++ b/src/libvirt_public.syms
@@ -627,4 +627,9 @@ LIBVIRT_1.1.0 {
virDomainMigrateToURI3;
} LIBVIRT_1.0.6;
+LIBVIRT_1.1.1 {
+ global:
+ virDomainSetMemoryStatsPeriod;
+} LIBVIRT_1.1.0;
+
# .... define new API here using predicted next version number ....
--
1.8.1.4