libvirt/src/qemu/qemu_command.h

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/*
* qemu_command.h: QEMU command generation
*
* Copyright (C) 2006-2016 Red Hat, Inc.
* Copyright (C) 2006 Daniel P. Berrange
*
* 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/>.
*
* Author: Daniel P. Berrange <berrange@redhat.com>
*/
#ifndef __QEMU_COMMAND_H__
# define __QEMU_COMMAND_H__
# include "domain_addr.h"
# include "domain_conf.h"
# include "vircommand.h"
# include "capabilities.h"
# include "qemu_conf.h"
# include "qemu_domain.h"
# include "qemu_domain_address.h"
# include "qemu_capabilities.h"
# include "logging/log_manager.h"
/* Config type for XML import/export conversions */
# define QEMU_CONFIG_FORMAT_ARGV "qemu-argv"
# define QEMU_DRIVE_HOST_PREFIX "drive-"
# define QEMU_FSDEV_HOST_PREFIX "fsdev-"
# define QEMU_BLOCK_IOTUNE_MAX 1000000000000000LL
VIR_ENUM_DECL(qemuVideo)
char *qemuBuildObjectCommandlineFromJSON(const char *type,
const char *alias,
virJSONValuePtr props);
virCommandPtr qemuBuildCommandLine(virQEMUDriverPtr driver,
virLogManagerPtr logManager,
virDomainDefPtr def,
virDomainChrSourceDefPtr monitor_chr,
bool monitor_json,
virQEMUCapsPtr qemuCaps,
const char *migrateURI,
virDomainSnapshotObjPtr snapshot,
virNetDevVPortProfileOp vmop,
bool standalone,
bool enableFips,
virBitmapPtr nodeset,
size_t *nnicindexes,
int **nicindexes,
const char *domainLibDir,
const char *domainChannelTargetDir)
ATTRIBUTE_NONNULL(15) ATTRIBUTE_NONNULL(16);
/* Generate '-device' string for chardev device */
int
qemuBuildChrDeviceStr(char **deviceStr,
const virDomainDef *vmdef,
virDomainChrDefPtr chr,
virQEMUCapsPtr qemuCaps);
/* With vlan == -1, use netdev syntax, else old hostnet */
char *qemuBuildHostNetStr(virDomainNetDefPtr net,
virQEMUDriverPtr driver,
char type_sep,
int vlan,
char **tapfd,
size_t tapfdSize,
char **vhostfd,
size_t vhostfdSize);
/* Legacy, pre device support */
char *qemuBuildNicStr(virDomainNetDefPtr net,
const char *prefix,
int vlan);
/* Current, best practice */
char *qemuBuildNicDevStr(virDomainDefPtr def,
virDomainNetDefPtr net,
int vlan,
unsigned int bootindex,
size_t vhostfdSize,
virQEMUCapsPtr qemuCaps);
char *qemuDeviceDriveHostAlias(virDomainDiskDefPtr disk);
/* Both legacy & current support */
char *qemuBuildDriveStr(virDomainDiskDefPtr disk,
bool bootable,
virQEMUCapsPtr qemuCaps);
/* Current, best practice */
char *qemuBuildDriveDevStr(const virDomainDef *def,
virDomainDiskDefPtr disk,
unsigned int bootindex,
virQEMUCapsPtr qemuCaps);
/* Current, best practice */
char *qemuBuildControllerDevStr(const virDomainDef *domainDef,
virDomainControllerDefPtr def,
virQEMUCapsPtr qemuCaps,
int *nusbcontroller);
int qemuBuildMemoryBackendStr(unsigned long long size,
unsigned long long pagesize,
int guestNode,
virBitmapPtr userNodeset,
virBitmapPtr autoNodeset,
virDomainDefPtr def,
virQEMUCapsPtr qemuCaps,
virQEMUDriverConfigPtr cfg,
const char **backendType,
virJSONValuePtr *backendProps,
bool force);
char *qemuBuildMemoryDeviceStr(virDomainMemoryDefPtr mem);
/* Current, best practice */
char *qemuBuildPCIHostdevDevStr(const virDomainDef *def,
virDomainHostdevDefPtr dev,
unsigned int bootIndex,
const char *configfd,
virQEMUCapsPtr qemuCaps);
char *qemuBuildRNGDevStr(const virDomainDef *def,
virDomainRNGDefPtr dev,
virQEMUCapsPtr qemuCaps);
int qemuBuildRNGBackendProps(virDomainRNGDefPtr rng,
virQEMUCapsPtr qemuCaps,
const char **type,
virJSONValuePtr *props);
char *qemuBuildShmemDevStr(virDomainDefPtr def,
virDomainShmemDefPtr shmem,
virQEMUCapsPtr qemuCaps);
char *qemuBuildShmemBackendStr(virLogManagerPtr logManager,
virCommandPtr cmd,
virDomainDefPtr def,
virDomainShmemDefPtr shmem,
virQEMUCapsPtr qemuCaps);
int qemuOpenPCIConfig(virDomainHostdevDefPtr dev);
/* Current, best practice */
char *qemuBuildUSBHostdevDevStr(const virDomainDef *def,
virDomainHostdevDefPtr dev,
virQEMUCapsPtr qemuCaps);
char *qemuBuildSCSIHostdevDrvStr(virDomainHostdevDefPtr dev,
virQEMUCapsPtr qemuCaps);
char *qemuBuildSCSIHostdevDevStr(const virDomainDef *def,
virDomainHostdevDefPtr dev,
virQEMUCapsPtr qemuCaps);
char *qemuBuildRedirdevDevStr(const virDomainDef *def,
virDomainRedirdevDefPtr dev,
virQEMUCapsPtr qemuCaps);
qemu: allocate network connections sooner during domain startup VFIO device assignment requires a cgroup ACL to be setup for access to the /dev/vfio/nn "group" device for any devices that will be assigned to a guest. In the case of a host device that is allocated from a pool, it was being allocated during qemuBuildCommandLine(), which is called by qemuProcessStart() *after* the all-encompassing qemuSetupCgroup() was called, meaning that the standard Cgroup ACL setup wasn't creating ACLs for these devices allocated from pools. One possible solution was to manually add a single ACL down inside qemuBuildCommandLine() when networkAllocateActualDevice() is called, but that has two problems: 1) the function that adds the cgroup ACL requires a virDomainObjPtr, which isn't available in qemuBuildCommandLine(), and 2) we really shouldn't be doing network device setup inside qemuBuildCommandLine() anyway. Instead, I've created a new function called qemuNetworkPrepareDevices() which is called just before qemuPrepareHostDevices() during qemuProcessStart() (explanation of ordering in the comments), i.e. well before the call to qemuSetupCgroup(). To minimize code churn in a patch that will be backported to 1.0.5-maint, qemuNetworkPrepareDevices only does networkAllocateActualDevice() and the bare amount of setup required for type='hostdev network devices, but it eventually should do *all* device setup for guest network devices. Note that some of the code that was previously needed in qemuBuildCommandLine() is no longer required when networkAllocateActualDevice() is called earlier: * qemuAssignDeviceHostdevAlias() is already done further down in qemuProcessStart(). * qemuPrepareHostdevPCIDevices() is called by qemuPrepareHostDevices() which is called after qemuNetworkPrepareDevices() in qemuProcessStart(). As hinted above, this new function should be moved into a separate qemu_network.c (or similarly named) file along with qemuPhysIfaceConnect(), qemuNetworkIfaceConnect(), and qemuOpenVhostNet(), and expanded to call those functions as well, then the nnets loop in qemuBuildCommandLine() should be reduced to only build the commandline string (which itself can be in a separate qemuInterfaceBuilldCommandLine() function as suggested by Michal). However, this will require storing away an array of tapfd and vhostfd that are needed for the commandline, so I would rather do that in a separate patch and leave this patch at the minimum to fix the bug.
2013-05-06 19:43:56 +00:00
int qemuNetworkPrepareDevices(virDomainDefPtr def);
int qemuGetDriveSourceString(virStorageSourcePtr src,
qemuDomainSecretInfoPtr secinfo,
char **source);
int qemuCheckDiskConfig(virDomainDiskDefPtr disk);
bool
qemuCheckFips(void);
bool qemuCheckCCWS390AddressSupport(const virDomainDef *def,
virDomainDeviceInfo info,
virQEMUCapsPtr qemuCaps,
const char *devicename);
#endif /* __QEMU_COMMAND_H__*/