libvirt/src/vz/vz_sdk.h

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/*
* vz_sdk.h: core driver functions for managing
* Parallels Cloud Server hosts
*
* Copyright (C) 2014 Parallels, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
*/
#ifndef LIBVIRT_VZ_SDK_H
# define LIBVIRT_VZ_SDK_H
# include <Parallels.h>
# include "vz_utils.h"
int prlsdkInit(void);
void prlsdkDeinit(void);
int prlsdkConnect(vzDriverPtr driver);
void prlsdkDisconnect(vzDriverPtr driver);
int
prlsdkLoadDomains(vzDriverPtr driver);
virDomainObjPtr
prlsdkAddDomainByUUID(vzDriverPtr driver, const unsigned char *uuid);
virDomainObjPtr
prlsdkAddDomainByName(vzDriverPtr driver, const char *name);
int prlsdkUpdateDomain(vzDriverPtr driver, virDomainObjPtr dom);
int prlsdkStart(virDomainObjPtr dom);
int prlsdkKill(virDomainObjPtr dom);
int prlsdkStop(virDomainObjPtr dom);
int prlsdkPause(virDomainObjPtr dom);
int prlsdkResume(virDomainObjPtr dom);
int prlsdkSuspend(virDomainObjPtr dom);
int prlsdkRestart(virDomainObjPtr dom);
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int prlsdkReset(virDomainObjPtr dom);
int
prlsdkApplyConfig(vzDriverPtr driver,
virDomainObjPtr dom,
virDomainDefPtr new);
int prlsdkCreateVm(vzDriverPtr driver, virDomainDefPtr def);
int prlsdkCreateCt(virConnectPtr conn, virDomainDefPtr def);
int
prlsdkUnregisterDomain(vzDriverPtr driver, virDomainObjPtr dom, unsigned int flags);
int
prlsdkDomainManagedSaveRemove(virDomainObjPtr dom);
int
prlsdkAttachDevice(vzDriverPtr driver, virDomainObjPtr dom, virDomainDeviceDefPtr dev);
int
prlsdkDetachDevice(vzDriverPtr driver, virDomainObjPtr dom, virDomainDeviceDefPtr dev);
parallels: add block device statistics to driver Statistics provided through PCS SDK. As we have only async interface in SDK we need to be subscribed to statistics in order to get it. Trivial solution on every stat request to subscribe, wait event and then unsubscribe will lead to significant delays in case of a number of successive requests, as the event will be delivered on next PCS server notify cycle. On the other hand we don't want to keep unnesessary subscribtion. So we take an hibrid solution to subcsribe on first request and then keep a subscription while requests are active. We populate cache of statistics on subscribtion events and use this cache to serve libvirts requests. * Cache details. Cache is just handle to last arrived event, we call this cache as if this handle is valid it is used to serve synchronous statistics requests. We use number of successive events count to detect that user lost interest to statistics. We reset this count to 0 on every request. If more than PARALLELS_STATISTICS_DROP_COUNT successive events arrive we unsubscribe. Special value of -1 of this counter is used to differentiate between subscribed/unsubscribed state to protect from delayed events. Values of PARALLELS_STATISTICS_DROP_COUNT and PARALLELS_STATISTICS_TIMEOUT are just drop-ins, choosen without special consideration. * Thread safety issues Use parallelsDomObjFromDomainRef in parallelsDomainBlockStats as we could wait on domain lock down on stack in prlsdkGetStatsParam and if we won't keep reference we could get dangling pointer on return from wait. Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@parallels.com>
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int
prlsdkUpdateDevice(vzDriverPtr driver, virDomainObjPtr dom, virDomainDeviceDefPtr dev);
int
prlsdkGetBlockStats(PRL_HANDLE sdkstats, virDomainDiskDefPtr disk, virDomainBlockStatsPtr stats, bool isCt);
int
prlsdkGetNetStats(PRL_HANDLE sdkstas, PRL_HANDLE sdkdom, const char *path, virDomainInterfaceStatsPtr stats);
int
prlsdkGetVcpuStats(PRL_HANDLE sdkstas, int idx, unsigned long long *time);
int
prlsdkGetMemoryStats(PRL_HANDLE sdkstas, virDomainMemoryStatPtr stats, unsigned int nr_stats);
/* memsize is in MiB */
int prlsdkSetMemsize(virDomainObjPtr dom, unsigned int memsize);
int prlsdkSetCpuCount(virDomainObjPtr dom, unsigned int count);
int
prlsdkDomainSetUserPassword(virDomainObjPtr dom,
const char *user,
const char *password);
virDomainSnapshotObjListPtr prlsdkLoadSnapshots(virDomainObjPtr dom);
int prlsdkCreateSnapshot(virDomainObjPtr dom, const char *description);
int prlsdkDeleteSnapshot(virDomainObjPtr dom, const char *uuid, bool children);
int prlsdkSwitchToSnapshot(virDomainObjPtr dom, const char *uuid, bool paused);
int
prlsdkMigrate(virDomainObjPtr dom,
virURIPtr uri,
const char unsigned *session_uuid,
const char *dname,
unsigned int flags);
PRL_HANDLE
prlsdkSdkDomainLookupByName(vzDriverPtr driver, const char *name);
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int prlsdkCancelJob(virDomainObjPtr dom);
int prlsdkResizeImage(virDomainObjPtr dom, virDomainDiskDefPtr disk, unsigned long long newsize);
#endif /* LIBVIRT_VZ_SDK_H */