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Introduce virDomainMigrate*CompressionCache APIs

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Introduce virDomainMigrateGetCompressionCache and
virDomainMigrateSetCompressionCache APIs.
This commit is contained in:
Jiri Denemark 2013-02-18 17:31:08 +01:00
parent 8def32916d
commit 34f44e911f
5 changed files with 116 additions and 0 deletions
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7
include/libvirt/libvirt.h.in
View File

@ -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);

1
python/generator.py
View File

@ -444,6 +444,7 @@ skip_impl = (
'virNodeGetCPUStats',
'virNodeGetMemoryStats',
'virDomainGetBlockJobInfo',
'virDomainMigrateGetCompressionCache',
'virDomainMigrateGetMaxSpeed',
'virDomainBlockStatsFlags',
'virDomainSetBlockIoTune',

11
src/driver.h
View File

@ -604,6 +604,15 @@ typedef int
(*virDrvDomainMigrateSetMaxDowntime)(virDomainPtr domain,
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,
@ -1069,6 +1078,8 @@ struct _virDriver {
virDrvDomainGetJobStats domainGetJobStats;
virDrvDomainAbortJob domainAbortJob;
virDrvDomainMigrateSetMaxDowntime domainMigrateSetMaxDowntime;
virDrvDomainMigrateGetCompressionCache domainMigrateGetCompressionCache;
virDrvDomainMigrateSetCompressionCache domainMigrateSetCompressionCache;
virDrvDomainMigrateGetMaxSpeed domainMigrateGetMaxSpeed;
virDrvDomainMigrateSetMaxSpeed domainMigrateSetMaxSpeed;
virDrvDomainEventRegisterAny domainEventRegisterAny;

95
src/libvirt.c
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@ -17551,6 +17551,101 @@ error:
return -1;
}
/**
* 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->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

2
src/libvirt_public.syms
View File

@ -606,6 +606,8 @@ LIBVIRT_1.0.2 {
LIBVIRT_1.0.3 {
global:
virDomainGetJobStats;
virDomainMigrateGetCompressionCache;
virDomainMigrateSetCompressionCache;
virNodeDeviceLookupSCSIHostByWWN;
} LIBVIRT_1.0.2;