12:08 p.m.
Add virDomainIOThreadsSet to allow setting the number of IOThreads for
a domain.
The API supports updating both the --live domain and the --config data.
Signed-off-by: John Ferlan <jferlan(a)redhat.com>
---
include/libvirt/libvirt-domain.h | 3 ++
src/driver-hypervisor.h | 6 ++++
src/libvirt-domain.c | 60 ++++++++++++++++++++++++++++++++++++++++
src/libvirt_public.syms | 1 +
4 files changed, 70 insertions(+)
diff --git a/include/libvirt/libvirt-domain.h b/include/libvirt/libvirt-domain.h
index 5d1d868..d7ce6f8 100644
--- a/include/libvirt/libvirt-domain.h
+++ b/include/libvirt/libvirt-domain.h
@@ -1615,6 +1615,9 @@ int virDomainPinIOThread(virDomainPtr domain,
unsigned char *cpumap,
int maplen,
unsigned int flags);
+int virDomainSetIOThreads(virDomainPtr domain,
+ unsigned int niothreads,
+ unsigned int flags);
/**
* VIR_USE_CPU:
diff --git a/src/driver-hypervisor.h b/src/driver-hypervisor.h
index 3f9bf02..2e4104b 100644
--- a/src/driver-hypervisor.h
+++ b/src/driver-hypervisor.h
@@ -393,6 +393,11 @@ typedef int
unsigned int flags);
typedef int
+(*virDrvDomainSetIOThreads)(virDomainPtr domain,
+ unsigned int iothreads,
+ unsigned int flags);
+
+typedef int
(*virDrvDomainGetSecurityLabel)(virDomainPtr domain,
virSecurityLabelPtr seclabel);
@@ -1273,6 +1278,7 @@ struct _virHypervisorDriver {
virDrvDomainGetMaxVcpus domainGetMaxVcpus;
virDrvDomainGetIOThreadsInfo domainGetIOThreadsInfo;
virDrvDomainPinIOThread domainPinIOThread;
+ virDrvDomainSetIOThreads domainSetIOThreads;
virDrvDomainGetSecurityLabel domainGetSecurityLabel;
virDrvDomainGetSecurityLabelList domainGetSecurityLabelList;
virDrvNodeGetSecurityModel nodeGetSecurityModel;
diff --git a/src/libvirt-domain.c b/src/libvirt-domain.c
index 0bd9274..7176301 100644
--- a/src/libvirt-domain.c
+++ b/src/libvirt-domain.c
@@ -8042,6 +8042,66 @@ virDomainPinIOThread(virDomainPtr domain,
/**
+ * virDomainSetIOThreads:
+ * @domain: pointer to domain object
+ * @niothreads: the new number of IOThreads for this domain
+ * @flags: bitwise-OR of virDomainModificationImpact
+ *
+ * Dynamically change the number of IOThreads used by the domain.
+ * Note that this call faiy fail if the underlying virtualization hypervisor
+ * does not support it or if growing the number is arbitrarily limited.
+ * This function may require privileged access to the hypervisor.
+ *
+ * @flags may include VIR_DOMAIN_AFFECT_LIVE to affect a running
+ * domain (which may fail if domain is not active), or
+ * VIR_DOMAIN_AFFECT_CONFIG to affect the next boot via the XML
+ * description of the domain. Both flags may be set.
+ * 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
+virDomainSetIOThreads(virDomainPtr domain,
+ unsigned int niothreads,
+ unsigned int flags)
+{
+ virConnectPtr conn;
+
+ VIR_DOMAIN_DEBUG(domain, "niothreads=%u, flags=%x", niothreads, flags);
+
+ virResetLastError();
+
+ virCheckDomainReturn(domain, -1);
+ virCheckReadOnlyGoto(domain->conn->flags, error);
+
+ if ((unsigned short) niothreads != niothreads) {
+ virReportError(VIR_ERR_OVERFLOW, _("input too large: %u"),
niothreads);
+ goto error;
+ }
+ conn = domain->conn;
+
+ if (conn->driver->domainSetIOThreads) {
+ int ret;
+ ret = conn->driver->domainSetIOThreads(domain, niothreads, flags);
+ if (ret < 0)
+ goto error;
+ return ret;
+ }
+
+ virReportUnsupportedError();
+
+ error:
+ virDispatchError(domain->conn);
+ return -1;
+}
+
+
+/**
* virDomainGetSecurityLabel:
* @domain: a domain object
* @seclabel: pointer to a virSecurityLabel structure
diff --git a/src/libvirt_public.syms b/src/libvirt_public.syms
index e4cf7ed..fdcbd6f 100644
--- a/src/libvirt_public.syms
+++ b/src/libvirt_public.syms
@@ -702,6 +702,7 @@ LIBVIRT_1.2.14 {
virDomainPinIOThread;
virDomainInterfaceAddresses;
virDomainInterfaceFree;
+ virDomainSetIOThreads;
} LIBVIRT_1.2.12;
# .... define new API here using predicted next version number ....
--
2.1.0