6:35 a.m.
Introduce virDomainMigrateGetCompressionCache and
virDomainMigrateSetCompressionCache APIs.
---
include/libvirt/libvirt.h.in | 7 +++
python/generator.py | 1 +
src/driver.h | 11 +++++
src/libvirt.c | 100 +++++++++++++++++++++++++++++++++++++++++++
src/libvirt_public.syms | 2 +
5 files changed, 121 insertions(+)
diff --git a/include/libvirt/libvirt.h.in b/include/libvirt/libvirt.h.in
index 9d1c6ea..7e89e2e 100644
--- a/include/libvirt/libvirt.h.in
+++ b/include/libvirt/libvirt.h.in
@@ -1215,6 +1215,13 @@ int virDomainMigrateSetMaxDowntime (virDomainPtr domain,
unsigned long long downtime,
unsigned int flags);
+int virDomainMigrateGetCompressionCache(virDomainPtr domain,
+ unsigned long long *cacheSize,
+ unsigned int flags);
+int virDomainMigrateSetCompressionCache(virDomainPtr domain,
+ unsigned long long cacheSize,
+ unsigned int flags);
+
int virDomainMigrateSetMaxSpeed(virDomainPtr domain,
unsigned long bandwidth,
unsigned int flags);
diff --git a/python/generator.py b/python/generator.py
index 92a7f58..e4c9579 100755
--- a/python/generator.py
+++ b/python/generator.py
@@ -444,6 +444,7 @@ skip_impl = (
'virNodeGetCPUStats',
'virNodeGetMemoryStats',
'virDomainGetBlockJobInfo',
+ 'virDomainMigrateGetCompressionCache',
'virDomainMigrateGetMaxSpeed',
'virDomainBlockStatsFlags',
'virDomainSetBlockIoTune',
diff --git a/src/driver.h b/src/driver.h
index 71b71f6..f60bf93 100644
--- a/src/driver.h
+++ b/src/driver.h
@@ -605,6 +605,15 @@ typedef int
unsigned long long downtime,
unsigned int flags);
typedef int
+ (*virDrvDomainMigrateGetCompressionCache)(virDomainPtr domain,
+ unsigned long long *cacheSize,
+ unsigned int flags);
+typedef int
+ (*virDrvDomainMigrateSetCompressionCache)(virDomainPtr domain,
+ unsigned long long cacheSize,
+ unsigned int flags);
+
+typedef int
(*virDrvDomainMigrateSetMaxSpeed)(virDomainPtr domain,
unsigned long bandwidth,
unsigned int flags);
@@ -1069,6 +1078,8 @@ struct _virDriver {
virDrvDomainGetJobStats domainGetJobStats;
virDrvDomainAbortJob domainAbortJob;
virDrvDomainMigrateSetMaxDowntime domainMigrateSetMaxDowntime;
+ virDrvDomainMigrateGetCompressionCache domainMigrateGetCompressionCache;
+ virDrvDomainMigrateSetCompressionCache domainMigrateSetCompressionCache;
virDrvDomainMigrateGetMaxSpeed domainMigrateGetMaxSpeed;
virDrvDomainMigrateSetMaxSpeed domainMigrateSetMaxSpeed;
virDrvDomainEventRegisterAny domainEventRegisterAny;
diff --git a/src/libvirt.c b/src/libvirt.c
index 3611839..d1dca40 100644
--- a/src/libvirt.c
+++ b/src/libvirt.c
@@ -17550,6 +17550,106 @@ error:
}
/**
+ * virDomainMigrateGetCompressionCache:
+ * @domain: a domain object
+ * @cacheSize: return value of current size of the cache (in bytes)
+ * @flags: extra flags; not used yet, so callers should always pass 0
+ *
+ * Gets current size of the cache (in bytes) used for compressing repeatedly
+ * transferred memory pages during live migration.
+ *
+ * Returns 0 in case of success, -1 otherwise.
+ */
+int
+virDomainMigrateGetCompressionCache(virDomainPtr domain,
+ unsigned long long *cacheSize,
+ unsigned int flags)
+{
+ virConnectPtr conn;
+
+ VIR_DOMAIN_DEBUG(domain, "cacheSize=%p, flags=%x", cacheSize, flags);
+
+ virResetLastError();
+
+ if (!VIR_IS_CONNECTED_DOMAIN(domain)) {
+ virLibDomainError(VIR_ERR_INVALID_DOMAIN, __FUNCTION__);
+ virDispatchError(NULL);
+ return -1;
+ }
+
+ conn = domain->conn;
+
+ virCheckNonNullArgGoto(cacheSize, error);
+
+ if (conn->flags & VIR_CONNECT_RO) {
+ virLibDomainError(VIR_ERR_OPERATION_DENIED, __FUNCTION__);
+ goto error;
+ }
+
+ if (conn->driver->domainMigrateGetCompressionCache) {
+ if (conn->driver->domainMigrateGetCompressionCache(domain, cacheSize,
+ flags) < 0)
+ goto error;
+ return 0;
+ }
+
+ virLibConnError(VIR_ERR_NO_SUPPORT, __FUNCTION__);
+error:
+ virDispatchError(conn);
+ return -1;
+}
+
+/**
+ * virDomainMigrateSetCompressionCache:
+ * @domain: a domain object
+ * @cacheSize: size of the cache (in bytes) used for compression
+ * @flags: extra flags; not used yet, so callers should always pass 0
+ *
+ * Sets size of the cache (in bytes) used for compressing repeatedly
+ * transferred memory pages during live migration. It's supposed to be called
+ * while the domain is being live-migrated as a reaction to migration progress
+ * and increasing number of compression cache misses obtained from
+ * virDomainGetJobStats.
+ *
+ * Returns 0 in case of success, -1 otherwise.
+ */
+int
+virDomainMigrateSetCompressionCache(virDomainPtr domain,
+ unsigned long long cacheSize,
+ unsigned int flags)
+{
+ virConnectPtr conn;
+
+ VIR_DOMAIN_DEBUG(domain, "cacheSize=%llu, flags=%x", cacheSize, flags);
+
+ virResetLastError();
+
+ if (!VIR_IS_CONNECTED_DOMAIN(domain)) {
+ virLibDomainError(VIR_ERR_INVALID_DOMAIN, __FUNCTION__);
+ virDispatchError(NULL);
+ return -1;
+ }
+
+ conn = domain->conn;
+ if (conn->flags & VIR_CONNECT_RO) {
+ virLibDomainError(VIR_ERR_OPERATION_DENIED, __FUNCTION__);
+ goto error;
+ }
+
+ if (conn->driver->domainMigrateSetCompressionCache) {
+ if (conn->driver->domainMigrateSetCompressionCache(domain, cacheSize,
+ flags) < 0)
+ goto error;
+ return 0;
+ }
+
+ virLibConnError(VIR_ERR_NO_SUPPORT, __FUNCTION__);
+error:
+ virDispatchError(conn);
+ return -1;
+}
+
+/**
* virDomainMigrateSetMaxSpeed:
* @domain: a domain object
* @bandwidth: migration bandwidth limit in Mbps
diff --git a/src/libvirt_public.syms b/src/libvirt_public.syms
index 361408f..ab993ed 100644
--- a/src/libvirt_public.syms
+++ b/src/libvirt_public.syms
@@ -606,6 +606,8 @@ LIBVIRT_1.0.2 {
LIBVIRT_1.0.3 {
global:
virDomainGetJobStats;
+ virDomainMigrateGetCompressionCache;
+ virDomainMigrateSetCompressionCache;
virNodeDeviceLookupSCSIHostByWWN;
} LIBVIRT_1.0.2;
--
1.8.1.2