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59080d84c0
When we allow multiple instances of the driver for the same user account, using a separate root directory, we need to ensure mutual exclusion. Use a pidfile to guarantee this. In privileged libvirtd this ends up locking /var/run/libvirt/libxl/driver.pid In unprivileged libvirtd this ends up locking /run/user/$UID/libvirt/libxl/run/driver.pid NB, the latter can vary depending on $XDG_RUNTIME_DIR Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
232 lines
6.2 KiB
C
232 lines
6.2 KiB
C
/*
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* libxl_conf.h: libxl configuration management
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*
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* Copyright (C) 2011-2014 SUSE LINUX Products GmbH, Nuernberg, Germany.
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* Copyright (C) 2011 Univention GmbH.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <libxl.h>
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#include "internal.h"
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#include "libvirt_internal.h"
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#include "virdomainobjlist.h"
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#include "domain_event.h"
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#include "capabilities.h"
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#include "configmake.h"
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#include "virportallocator.h"
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#include "virobject.h"
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#include "virchrdev.h"
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#include "virhostdev.h"
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#include "locking/lock_manager.h"
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#include "virfirmware.h"
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#include "libxl_capabilities.h"
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#include "libxl_logger.h"
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#define LIBXL_DRIVER_NAME "xenlight"
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#define LIBXL_VNC_PORT_MIN 5900
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#define LIBXL_VNC_PORT_MAX 65535
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#define LIBXL_MIGRATION_PORT_MIN 49152
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#define LIBXL_MIGRATION_PORT_MAX 49216
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#define LIBXL_CONFIG_BASE_DIR SYSCONFDIR "/libvirt"
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#define LIBXL_CONFIG_DIR SYSCONFDIR "/libvirt/libxl"
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#define LIBXL_AUTOSTART_DIR LIBXL_CONFIG_DIR "/autostart"
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#define LIBXL_STATE_DIR LOCALSTATEDIR "/run/libvirt/libxl"
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#define LIBXL_LOG_DIR LOCALSTATEDIR "/log/libvirt/libxl"
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#define LIBXL_LIB_DIR LOCALSTATEDIR "/lib/libvirt/libxl"
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#define LIBXL_SAVE_DIR LIBXL_LIB_DIR "/save"
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#define LIBXL_DUMP_DIR LIBXL_LIB_DIR "/dump"
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#define LIBXL_CHANNEL_DIR LIBXL_LIB_DIR "/channel/target"
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#define LIBXL_BOOTLOADER_PATH "pygrub"
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typedef struct _libxlDriverPrivate libxlDriverPrivate;
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typedef libxlDriverPrivate *libxlDriverPrivatePtr;
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typedef struct _libxlDriverConfig libxlDriverConfig;
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typedef libxlDriverConfig *libxlDriverConfigPtr;
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struct _libxlDriverConfig {
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virObject parent;
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const libxl_version_info *verInfo;
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unsigned int version;
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/* log stream for driver-wide libxl ctx */
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libxlLoggerPtr logger;
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/* libxl ctx for driver wide ops; getVersion, getNodeInfo, ... */
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libxl_ctx *ctx;
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/* Controls automatic ballooning of domain0. If true, attempt to get
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* memory for new domains from domain0. */
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bool autoballoon;
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char *lockManagerName;
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int keepAliveInterval;
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unsigned int keepAliveCount;
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bool nested_hvm;
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/* Once created, caps are immutable */
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virCapsPtr caps;
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char *configBaseDir;
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char *configDir;
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char *autostartDir;
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char *logDir;
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char *stateDir;
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char *libDir;
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char *saveDir;
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char *autoDumpDir;
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char *channelDir;
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virFirmwarePtr *firmwares;
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size_t nfirmwares;
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};
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struct _libxlDriverPrivate {
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virMutex lock;
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virHostdevManagerPtr hostdevMgr;
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/* Require lock to get reference on 'config',
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* then lockless thereafter */
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libxlDriverConfigPtr config;
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/* pid file FD, ensures two copies of the driver can't use the same root */
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int lockFD;
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/* Atomic inc/dec only */
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unsigned int nactive;
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/* Immutable pointers. Caller must provide locking */
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virStateInhibitCallback inhibitCallback;
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void *inhibitOpaque;
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/* Immutable pointer, self-locking APIs */
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virDomainObjListPtr domains;
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/* Immutable pointer, immutable object */
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virDomainXMLOptionPtr xmlopt;
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/* Immutable pointer, self-locking APIs */
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virObjectEventStatePtr domainEventState;
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/* Immutable pointer, immutable object */
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virPortAllocatorRangePtr reservedGraphicsPorts;
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/* Immutable pointer, immutable object */
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virPortAllocatorRangePtr migrationPorts;
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/* Immutable pointer, lockless APIs*/
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virSysinfoDefPtr hostsysinfo;
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/* Immutable pointer. lockless access */
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virLockManagerPluginPtr lockManager;
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};
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#define LIBXL_SAVE_MAGIC "libvirt-xml\n \0 \r"
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#ifdef LIBXL_HAVE_SRM_V2
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# define LIBXL_SAVE_VERSION 2
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#else
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# define LIBXL_SAVE_VERSION 1
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#endif
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typedef struct _libxlSavefileHeader libxlSavefileHeader;
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typedef libxlSavefileHeader *libxlSavefileHeaderPtr;
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struct _libxlSavefileHeader {
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char magic[sizeof(LIBXL_SAVE_MAGIC)-1];
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uint32_t version;
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uint32_t xmlLen;
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/* 24 bytes used, pad up to 64 bytes */
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uint32_t unused[10];
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};
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libxlDriverConfigPtr
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libxlDriverConfigNew(void);
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libxlDriverConfigPtr
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libxlDriverConfigGet(libxlDriverPrivatePtr driver);
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int
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libxlDriverNodeGetInfo(libxlDriverPrivatePtr driver,
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virNodeInfoPtr info);
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int libxlDriverConfigLoadFile(libxlDriverConfigPtr cfg,
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const char *filename);
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int
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libxlDriverGetDom0MaxmemConf(libxlDriverConfigPtr cfg,
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unsigned long long *maxmem);
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int
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libxlMakeDisk(virDomainDiskDefPtr l_dev, libxl_device_disk *x_dev);
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void
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libxlUpdateDiskDef(virDomainDiskDefPtr l_dev, libxl_device_disk *x_dev);
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int
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libxlMakeNic(virDomainDefPtr def,
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virDomainNetDefPtr l_nic,
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libxl_device_nic *x_nic,
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bool attach);
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int
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libxlMakeVfb(virPortAllocatorRangePtr graphicsports,
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virDomainGraphicsDefPtr l_vfb, libxl_device_vfb *x_vfb);
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int
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libxlMakePCI(virDomainHostdevDefPtr hostdev, libxl_device_pci *pcidev);
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#ifdef LIBXL_HAVE_PVUSB
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int
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libxlMakeUSBController(virDomainControllerDefPtr controller,
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libxl_device_usbctrl *usbctrl);
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int
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libxlMakeUSB(virDomainHostdevDefPtr hostdev, libxl_device_usbdev *usbdev);
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#endif
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virDomainXMLOptionPtr
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libxlCreateXMLConf(void);
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#ifdef LIBXL_HAVE_DEVICE_CHANNEL
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# define LIBXL_ATTR_UNUSED
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#else
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# define LIBXL_ATTR_UNUSED ATTRIBUTE_UNUSED
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#endif
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int
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libxlBuildDomainConfig(virPortAllocatorRangePtr graphicsports,
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virDomainDefPtr def,
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libxlDriverConfigPtr cfg,
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libxl_domain_config *d_config);
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static inline void
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libxlDriverLock(libxlDriverPrivatePtr driver)
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{
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virMutexLock(&driver->lock);
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}
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static inline void
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libxlDriverUnlock(libxlDriverPrivatePtr driver)
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{
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virMutexUnlock(&driver->lock);
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}
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