libvirt/src/qemu/qemu_monitor.h

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/*
* qemu_monitor.h: interaction with QEMU monitor console
*
* Copyright (C) 2006-2013 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_MONITOR_H
# define QEMU_MONITOR_H
# include "internal.h"
# include "domain_conf.h"
# include "virbitmap.h"
# include "virhash.h"
2012-12-12 17:53:50 +00:00
# include "virjson.h"
# include "device_conf.h"
# include "cpu/cpu.h"
typedef struct _qemuMonitor qemuMonitor;
typedef qemuMonitor *qemuMonitorPtr;
typedef struct _qemuMonitorMessage qemuMonitorMessage;
typedef qemuMonitorMessage *qemuMonitorMessagePtr;
typedef int (*qemuMonitorPasswordHandler)(qemuMonitorPtr mon,
qemuMonitorMessagePtr msg,
const char *data,
size_t len,
void *opaque);
struct _qemuMonitorMessage {
int txFD;
char *txBuffer;
int txOffset;
int txLength;
/* Used by the text monitor reply / error */
char *rxBuffer;
int rxLength;
/* Used by the JSON monitor to hold reply / error */
void *rxObject;
/* True if rxBuffer / rxObject are ready, or a
* fatal error occurred on the monitor channel
*/
bool finished;
qemuMonitorPasswordHandler passwordHandler;
void *passwordOpaque;
};
typedef void (*qemuMonitorDestroyCallback)(qemuMonitorPtr mon,
virDomainObjPtr vm,
void *opaque);
typedef void (*qemuMonitorEofNotifyCallback)(qemuMonitorPtr mon,
virDomainObjPtr vm,
void *opaque);
typedef void (*qemuMonitorErrorNotifyCallback)(qemuMonitorPtr mon,
virDomainObjPtr vm,
void *opaque);
/* XXX we'd really like to avoid virConnectPtr here
* It is required so the callback can find the active
* secret driver. Need to change this to work like the
* security drivers do, to avoid this
*/
typedef int (*qemuMonitorDiskSecretLookupCallback)(qemuMonitorPtr mon,
virConnectPtr conn,
virDomainObjPtr vm,
const char *path,
char **secret,
size_t *secretLen,
void *opaque);
typedef int (*qemuMonitorDomainShutdownCallback)(qemuMonitorPtr mon,
virDomainObjPtr vm,
void *opaque);
typedef int (*qemuMonitorDomainResetCallback)(qemuMonitorPtr mon,
virDomainObjPtr vm,
void *opaque);
typedef int (*qemuMonitorDomainPowerdownCallback)(qemuMonitorPtr mon,
virDomainObjPtr vm,
void *opaque);
typedef int (*qemuMonitorDomainStopCallback)(qemuMonitorPtr mon,
virDomainObjPtr vm,
void *opaque);
typedef int (*qemuMonitorDomainResumeCallback)(qemuMonitorPtr mon,
virDomainObjPtr vm,
void *opaque);
typedef int (*qemuMonitorDomainRTCChangeCallback)(qemuMonitorPtr mon,
virDomainObjPtr vm,
long long offset,
void *opaque);
typedef int (*qemuMonitorDomainWatchdogCallback)(qemuMonitorPtr mon,
virDomainObjPtr vm,
int action,
void *opaque);
typedef int (*qemuMonitorDomainIOErrorCallback)(qemuMonitorPtr mon,
virDomainObjPtr vm,
const char *diskAlias,
int action,
const char *reason,
void *opaque);
typedef int (*qemuMonitorDomainGraphicsCallback)(qemuMonitorPtr mon,
virDomainObjPtr vm,
int phase,
int localFamily,
const char *localNode,
const char *localService,
int remoteFamily,
const char *remoteNode,
const char *remoteService,
const char *authScheme,
const char *x509dname,
const char *saslUsername,
void *opaque);
typedef int (*qemuMonitorDomainBlockJobCallback)(qemuMonitorPtr mon,
virDomainObjPtr vm,
const char *diskAlias,
int type,
int status,
void *opaque);
typedef int (*qemuMonitorDomainTrayChangeCallback)(qemuMonitorPtr mon,
virDomainObjPtr vm,
const char *devAlias,
int reason,
void *opaque);
typedef int (*qemuMonitorDomainPMWakeupCallback)(qemuMonitorPtr mon,
virDomainObjPtr vm,
void *opaque);
typedef int (*qemuMonitorDomainPMSuspendCallback)(qemuMonitorPtr mon,
virDomainObjPtr vm,
void *opaque);
typedef int (*qemuMonitorDomainBalloonChangeCallback)(qemuMonitorPtr mon,
virDomainObjPtr vm,
unsigned long long actual,
void *opaque);
typedef int (*qemuMonitorDomainPMSuspendDiskCallback)(qemuMonitorPtr mon,
virDomainObjPtr vm,
void *opaque);
typedef int (*qemuMonitorDomainGuestPanicCallback)(qemuMonitorPtr mon,
virDomainObjPtr vm,
void *opaque);
typedef int (*qemuMonitorDomainDeviceDeletedCallback)(qemuMonitorPtr mon,
virDomainObjPtr vm,
const char *devAlias,
void *opaque);
typedef struct _qemuMonitorCallbacks qemuMonitorCallbacks;
typedef qemuMonitorCallbacks *qemuMonitorCallbacksPtr;
struct _qemuMonitorCallbacks {
qemuMonitorDestroyCallback destroy;
qemuMonitorEofNotifyCallback eofNotify;
qemuMonitorErrorNotifyCallback errorNotify;
qemuMonitorDiskSecretLookupCallback diskSecretLookup;
qemuMonitorDomainShutdownCallback domainShutdown;
qemuMonitorDomainResetCallback domainReset;
qemuMonitorDomainPowerdownCallback domainPowerdown;
qemuMonitorDomainStopCallback domainStop;
qemuMonitorDomainResumeCallback domainResume;
qemuMonitorDomainRTCChangeCallback domainRTCChange;
qemuMonitorDomainWatchdogCallback domainWatchdog;
qemuMonitorDomainIOErrorCallback domainIOError;
qemuMonitorDomainGraphicsCallback domainGraphics;
qemuMonitorDomainBlockJobCallback domainBlockJob;
qemuMonitorDomainTrayChangeCallback domainTrayChange;
qemuMonitorDomainPMWakeupCallback domainPMWakeup;
qemuMonitorDomainPMSuspendCallback domainPMSuspend;
qemuMonitorDomainBalloonChangeCallback domainBalloonChange;
qemuMonitorDomainPMSuspendDiskCallback domainPMSuspendDisk;
qemuMonitorDomainGuestPanicCallback domainGuestPanic;
qemuMonitorDomainDeviceDeletedCallback domainDeviceDeleted;
};
char *qemuMonitorEscapeArg(const char *in);
char *qemuMonitorUnescapeArg(const char *in);
qemuMonitorPtr qemuMonitorOpen(virDomainObjPtr vm,
virDomainChrSourceDefPtr config,
bool json,
qemuMonitorCallbacksPtr cb,
void *opaque)
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(4);
qemuMonitorPtr qemuMonitorOpenFD(virDomainObjPtr vm,
int sockfd,
bool json,
qemuMonitorCallbacksPtr cb,
void *opaque)
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(4);
void qemuMonitorClose(qemuMonitorPtr mon);
int qemuMonitorSetCapabilities(qemuMonitorPtr mon);
int qemuMonitorSetLink(qemuMonitorPtr mon,
const char *name,
enum virDomainNetInterfaceLinkState state);
/* These APIs are for use by the internal Text/JSON monitor impl code only */
char *qemuMonitorNextCommandID(qemuMonitorPtr mon);
int qemuMonitorSend(qemuMonitorPtr mon,
qemuMonitorMessagePtr msg);
virJSONValuePtr qemuMonitorGetOptions(qemuMonitorPtr mon)
ATTRIBUTE_NONNULL(1);
void qemuMonitorSetOptions(qemuMonitorPtr mon, virJSONValuePtr options)
ATTRIBUTE_NONNULL(1);
int qemuMonitorHMPCommandWithFd(qemuMonitorPtr mon,
const char *cmd,
int scm_fd,
char **reply);
# define qemuMonitorHMPCommand(mon, cmd, reply) \
qemuMonitorHMPCommandWithFd(mon, cmd, -1, reply)
/* XXX same comment about virConnectPtr as above */
int qemuMonitorGetDiskSecret(qemuMonitorPtr mon,
virConnectPtr conn,
const char *path,
char **secret,
size_t *secretLen);
int qemuMonitorEmitShutdown(qemuMonitorPtr mon);
int qemuMonitorEmitReset(qemuMonitorPtr mon);
int qemuMonitorEmitPowerdown(qemuMonitorPtr mon);
int qemuMonitorEmitStop(qemuMonitorPtr mon);
int qemuMonitorEmitResume(qemuMonitorPtr mon);
int qemuMonitorEmitRTCChange(qemuMonitorPtr mon, long long offset);
int qemuMonitorEmitWatchdog(qemuMonitorPtr mon, int action);
Add support for an explicit IO error event This introduces a new event type VIR_DOMAIN_EVENT_ID_IO_ERROR This event includes the action that is about to be taken as a result of the watchdog triggering typedef enum { VIR_DOMAIN_EVENT_IO_ERROR_NONE = 0, VIR_DOMAIN_EVENT_IO_ERROR_PAUSE, VIR_DOMAIN_EVENT_IO_ERROR_REPORT, } virDomainEventIOErrorAction; In addition it has the source path of the disk that had the error and its unique device alias. It does not include the target device name (/dev/sda), since this would preclude triggering IO errors from other file backed devices (eg serial ports connected to a file) Thus there is a new callback definition for this event type typedef void (*virConnectDomainEventIOErrorCallback)(virConnectPtr conn, virDomainPtr dom, const char *srcPath, const char *devAlias, int action, void *opaque); This is currently wired up to the QEMU block IO error events * daemon/remote.c: Dispatch IO error events to client * examples/domain-events/events-c/event-test.c: Watch for IO error events * include/libvirt/libvirt.h.in: Define new IO error event ID and callback signature * src/conf/domain_event.c, src/conf/domain_event.h, src/libvirt_private.syms: Extend API to handle IO error events * src/qemu/qemu_driver.c: Connect to the QEMU monitor event for block IO errors and emit a libvirt IO error event * src/remote/remote_driver.c: Receive and dispatch IO error events to application * src/remote/remote_protocol.x: Wire protocol definition for IO error events * src/qemu/qemu_monitor.c, src/qemu/qemu_monitor.h, src/qemu/qemu_monitor_json.c: Watch for BLOCK_IO_ERROR event from QEMU monitor
2010-03-18 19:37:44 +00:00
int qemuMonitorEmitIOError(qemuMonitorPtr mon,
const char *diskAlias,
int action,
const char *reason);
Add domain events for graphics network clients This introduces a new event type VIR_DOMAIN_EVENT_ID_GRAPHICS The same event can be emitted in 3 scenarios typedef enum { VIR_DOMAIN_EVENT_GRAPHICS_CONNECT = 0, VIR_DOMAIN_EVENT_GRAPHICS_INITIALIZE, VIR_DOMAIN_EVENT_GRAPHICS_DISCONNECT, } virDomainEventGraphicsPhase; Connect/disconnect are triggered at socket accept/close. The initialize phase is immediately after the protocol setup and authentication has completed. ie when the client is authorized and about to start interacting with the graphical desktop This event comes with *a lot* of potential information - IP address, port & address family of client - IP address, port & address family of server - Authentication scheme (arbitrary string) - Authenticated subject identity. A subject may have multiple identities with some authentication schemes. For example, vencrypt+sasl results in a x509dname and saslUsername identities. This results in a very complicated callback :-( typedef enum { VIR_DOMAIN_EVENT_GRAPHICS_ADDRESS_IPV4, VIR_DOMAIN_EVENT_GRAPHICS_ADDRESS_IPV6, } virDomainEventGraphicsAddressType; struct _virDomainEventGraphicsAddress { int family; const char *node; const char *service; }; typedef struct _virDomainEventGraphicsAddress virDomainEventGraphicsAddress; typedef virDomainEventGraphicsAddress *virDomainEventGraphicsAddressPtr; struct _virDomainEventGraphicsSubject { int nidentity; struct { const char *type; const char *name; } *identities; }; typedef struct _virDomainEventGraphicsSubject virDomainEventGraphicsSubject; typedef virDomainEventGraphicsSubject *virDomainEventGraphicsSubjectPtr; typedef void (*virConnectDomainEventGraphicsCallback)(virConnectPtr conn, virDomainPtr dom, int phase, virDomainEventGraphicsAddressPtr local, virDomainEventGraphicsAddressPtr remote, const char *authScheme, virDomainEventGraphicsSubjectPtr subject, void *opaque); The wire protocol is similarly complex struct remote_domain_event_graphics_address { int family; remote_nonnull_string node; remote_nonnull_string service; }; const REMOTE_DOMAIN_EVENT_GRAPHICS_IDENTITY_MAX = 20; struct remote_domain_event_graphics_identity { remote_nonnull_string type; remote_nonnull_string name; }; struct remote_domain_event_graphics_msg { remote_nonnull_domain dom; int phase; remote_domain_event_graphics_address local; remote_domain_event_graphics_address remote; remote_nonnull_string authScheme; remote_domain_event_graphics_identity subject<REMOTE_DOMAIN_EVENT_GRAPHICS_IDENTITY_MAX>; }; This is currently implemented in QEMU for the VNC graphics protocol, but designed to be usable with SPICE graphics in the future too. * daemon/remote.c: Dispatch graphics events to client * examples/domain-events/events-c/event-test.c: Watch for graphics events * include/libvirt/libvirt.h.in: Define new graphics event ID and callback signature * src/conf/domain_event.c, src/conf/domain_event.h, src/libvirt_private.syms: Extend API to handle graphics events * src/qemu/qemu_driver.c: Connect to the QEMU monitor event for VNC events and emit a libvirt graphics event * src/remote/remote_driver.c: Receive and dispatch graphics events to application * src/remote/remote_protocol.x: Wire protocol definition for graphics events * src/qemu/qemu_monitor.c, src/qemu/qemu_monitor.h, src/qemu/qemu_monitor_json.c: Watch for VNC_CONNECTED, VNC_INITIALIZED & VNC_DISCONNETED events from QEMU monitor
2010-03-19 13:27:45 +00:00
int qemuMonitorEmitGraphics(qemuMonitorPtr mon,
int phase,
int localFamily,
const char *localNode,
const char *localService,
int remoteFamily,
const char *remoteNode,
const char *remoteService,
const char *authScheme,
const char *x509dname,
const char *saslUsername);
int qemuMonitorEmitTrayChange(qemuMonitorPtr mon,
const char *devAlias,
int reason);
int qemuMonitorEmitPMWakeup(qemuMonitorPtr mon);
int qemuMonitorEmitPMSuspend(qemuMonitorPtr mon);
int qemuMonitorEmitBlockJob(qemuMonitorPtr mon,
const char *diskAlias,
int type,
int status);
int qemuMonitorEmitBalloonChange(qemuMonitorPtr mon,
unsigned long long actual);
int qemuMonitorEmitPMSuspendDisk(qemuMonitorPtr mon);
int qemuMonitorEmitGuestPanic(qemuMonitorPtr mon);
int qemuMonitorEmitDeviceDeleted(qemuMonitorPtr mon,
const char *devAlias);
int qemuMonitorStartCPUs(qemuMonitorPtr mon,
virConnectPtr conn);
int qemuMonitorStopCPUs(qemuMonitorPtr mon);
typedef enum {
QEMU_MONITOR_VM_STATUS_DEBUG,
QEMU_MONITOR_VM_STATUS_INMIGRATE,
QEMU_MONITOR_VM_STATUS_INTERNAL_ERROR,
QEMU_MONITOR_VM_STATUS_IO_ERROR,
QEMU_MONITOR_VM_STATUS_PAUSED,
QEMU_MONITOR_VM_STATUS_POSTMIGRATE,
QEMU_MONITOR_VM_STATUS_PRELAUNCH,
QEMU_MONITOR_VM_STATUS_FINISH_MIGRATE,
QEMU_MONITOR_VM_STATUS_RESTORE_VM,
QEMU_MONITOR_VM_STATUS_RUNNING,
QEMU_MONITOR_VM_STATUS_SAVE_VM,
QEMU_MONITOR_VM_STATUS_SHUTDOWN,
QEMU_MONITOR_VM_STATUS_WATCHDOG,
QEMU_MONITOR_VM_STATUS_GUEST_PANICKED,
QEMU_MONITOR_VM_STATUS_LAST
} qemuMonitorVMStatus;
VIR_ENUM_DECL(qemuMonitorVMStatus)
int qemuMonitorVMStatusToPausedReason(const char *status);
int qemuMonitorGetStatus(qemuMonitorPtr mon,
bool *running,
virDomainPausedReason *reason);
int qemuMonitorSystemReset(qemuMonitorPtr mon);
int qemuMonitorSystemPowerdown(qemuMonitorPtr mon);
int qemuMonitorGetCPUInfo(qemuMonitorPtr mon,
int **pids);
int qemuMonitorGetVirtType(qemuMonitorPtr mon,
int *virtType);
int qemuMonitorGetBalloonInfo(qemuMonitorPtr mon,
xml: use better types for memory values Using 'unsigned long' for memory values is risky on 32-bit platforms, as a PAE guest can have more than 4GiB memory. Our API is (unfortunately) locked at 'unsigned long' and a scale of 1024, but the rest of our system should consistently use 64-bit values, especially since the previous patch centralized overflow checking. * src/conf/domain_conf.h (_virDomainDef): Always use 64-bit values for memory. Change hugepage_backed to a bool. * src/conf/domain_conf.c (virDomainDefParseXML) (virDomainDefCheckABIStability, virDomainDefFormatInternal): Fix clients. * src/vmx/vmx.c (virVMXFormatConfig): Likewise. * src/xenxs/xen_sxpr.c (xenParseSxpr, xenFormatSxpr): Likewise. * src/xenxs/xen_xm.c (xenXMConfigGetULongLong): New function. (xenXMConfigGetULong, xenXMConfigSetInt): Avoid truncation. (xenParseXM, xenFormatXM): Fix clients. * src/phyp/phyp_driver.c (phypBuildLpar): Likewise. * src/openvz/openvz_driver.c (openvzDomainSetMemoryInternal): Likewise. * src/vbox/vbox_tmpl.c (vboxDomainDefineXML): Likewise. * src/qemu/qemu_command.c (qemuBuildCommandLine): Likewise. * src/qemu/qemu_process.c (qemuProcessStart): Likewise. * src/qemu/qemu_monitor.h (qemuMonitorGetBalloonInfo): Likewise. * src/qemu/qemu_monitor_text.h (qemuMonitorTextGetBalloonInfo): Likewise. * src/qemu/qemu_monitor_text.c (qemuMonitorTextGetBalloonInfo): Likewise. * src/qemu/qemu_monitor_json.h (qemuMonitorJSONGetBalloonInfo): Likewise. * src/qemu/qemu_monitor_json.c (qemuMonitorJSONGetBalloonInfo): Likewise. * src/qemu/qemu_driver.c (qemudDomainGetInfo) (qemuDomainGetXMLDesc): Likewise. * src/uml/uml_conf.c (umlBuildCommandLine): Likewise.
2012-03-02 20:27:39 +00:00
unsigned long long *currmem);
int qemuMonitorGetMemoryStats(qemuMonitorPtr mon,
virDomainMemoryStatPtr stats,
unsigned int nr_stats);
int qemuMonitorSetMemoryStatsPeriod(qemuMonitorPtr mon,
int period);
2012-01-19 16:58:58 +00:00
int qemuMonitorBlockIOStatusToError(const char *status);
virHashTablePtr qemuMonitorGetBlockInfo(qemuMonitorPtr mon);
struct qemuDomainDiskInfo *
qemuMonitorBlockInfoLookup(virHashTablePtr blockInfo,
const char *devname);
int qemuMonitorGetBlockStatsInfo(qemuMonitorPtr mon,
const char *dev_name,
long long *rd_req,
long long *rd_bytes,
long long *rd_total_times,
long long *wr_req,
long long *wr_bytes,
long long *wr_total_times,
long long *flush_req,
long long *flush_total_times,
long long *errs);
int qemuMonitorGetBlockStatsParamsNumber(qemuMonitorPtr mon,
int *nparams);
int qemuMonitorGetBlockExtent(qemuMonitorPtr mon,
const char *dev_name,
unsigned long long *extent);
int qemuMonitorBlockResize(qemuMonitorPtr mon,
const char *devname,
unsigned long long size);
int qemuMonitorSetVNCPassword(qemuMonitorPtr mon,
const char *password);
int qemuMonitorSetPassword(qemuMonitorPtr mon,
int type,
const char *password,
const char *action_if_connected);
int qemuMonitorExpirePassword(qemuMonitorPtr mon,
int type,
const char *expire_time);
int qemuMonitorSetBalloon(qemuMonitorPtr mon,
unsigned long newmem);
int qemuMonitorSetCPU(qemuMonitorPtr mon, int cpu, bool online);
/* XXX should we pass the virDomainDiskDefPtr instead
* and hide devname details inside monitor. Reconsider
* this when doing the QMP implementation
*/
int qemuMonitorEjectMedia(qemuMonitorPtr mon,
const char *dev_name,
bool force);
int qemuMonitorChangeMedia(qemuMonitorPtr mon,
const char *dev_name,
const char *newmedia,
const char *format);
int qemuMonitorSaveVirtualMemory(qemuMonitorPtr mon,
unsigned long long offset,
size_t length,
const char *path);
int qemuMonitorSavePhysicalMemory(qemuMonitorPtr mon,
unsigned long long offset,
size_t length,
const char *path);
int qemuMonitorSetMigrationSpeed(qemuMonitorPtr mon,
unsigned long bandwidth);
int qemuMonitorSetMigrationDowntime(qemuMonitorPtr mon,
unsigned long long downtime);
int qemuMonitorGetMigrationCacheSize(qemuMonitorPtr mon,
unsigned long long *cacheSize);
int qemuMonitorSetMigrationCacheSize(qemuMonitorPtr mon,
unsigned long long cacheSize);
enum {
QEMU_MONITOR_MIGRATION_STATUS_INACTIVE,
QEMU_MONITOR_MIGRATION_STATUS_ACTIVE,
QEMU_MONITOR_MIGRATION_STATUS_COMPLETED,
QEMU_MONITOR_MIGRATION_STATUS_ERROR,
QEMU_MONITOR_MIGRATION_STATUS_CANCELLED,
QEMU_MONITOR_MIGRATION_STATUS_SETUP,
QEMU_MONITOR_MIGRATION_STATUS_LAST
};
VIR_ENUM_DECL(qemuMonitorMigrationStatus)
typedef struct _qemuMonitorMigrationStatus qemuMonitorMigrationStatus;
typedef qemuMonitorMigrationStatus *qemuMonitorMigrationStatusPtr;
struct _qemuMonitorMigrationStatus {
int status;
unsigned long long total_time;
/* total or expected depending on status */
bool downtime_set;
unsigned long long downtime;
unsigned long long ram_transferred;
unsigned long long ram_remaining;
unsigned long long ram_total;
bool ram_duplicate_set;
unsigned long long ram_duplicate;
unsigned long long ram_normal;
unsigned long long ram_normal_bytes;
unsigned long long disk_transferred;
unsigned long long disk_remaining;
unsigned long long disk_total;
bool xbzrle_set;
unsigned long long xbzrle_cache_size;
unsigned long long xbzrle_bytes;
unsigned long long xbzrle_pages;
unsigned long long xbzrle_cache_miss;
unsigned long long xbzrle_overflow;
};
int qemuMonitorGetMigrationStatus(qemuMonitorPtr mon,
qemuMonitorMigrationStatusPtr status);
int qemuMonitorGetSpiceMigrationStatus(qemuMonitorPtr mon,
bool *spice_migrated);
typedef enum {
QEMU_MONITOR_MIGRATION_CAPS_XBZRLE,
QEMU_MONITOR_MIGRATION_CAPS_LAST
} qemuMonitorMigrationCaps;
VIR_ENUM_DECL(qemuMonitorMigrationCaps);
int qemuMonitorGetMigrationCapability(qemuMonitorPtr mon,
qemuMonitorMigrationCaps capability);
int qemuMonitorSetMigrationCapability(qemuMonitorPtr mon,
qemuMonitorMigrationCaps capability);
typedef enum {
QEMU_MONITOR_MIGRATE_BACKGROUND = 1 << 0,
QEMU_MONITOR_MIGRATE_NON_SHARED_DISK = 1 << 1, /* migration with non-shared storage with full disk copy */
QEMU_MONITOR_MIGRATE_NON_SHARED_INC = 1 << 2, /* migration with non-shared storage with incremental copy */
QEMU_MONITOR_MIGRATION_FLAGS_LAST
} QEMU_MONITOR_MIGRATE;
int qemuMonitorMigrateToFd(qemuMonitorPtr mon,
unsigned int flags,
int fd);
int qemuMonitorMigrateToHost(qemuMonitorPtr mon,
unsigned int flags,
const char *hostname,
int port);
int qemuMonitorMigrateToCommand(qemuMonitorPtr mon,
unsigned int flags,
const char * const *argv);
/* In general, BS is the smallest fundamental block size we can use to
* access a block device; everything must be aligned to a multiple of
* this. Linux generally supports a BS as small as 512, but with
* newer disks with 4k sectors, performance is better if we guarantee
* alignment to the sector size. However, operating on BS-sized
* blocks is painfully slow, so we also have a transfer size that is
* larger but only aligned to the smaller block size.
*/
# define QEMU_MONITOR_MIGRATE_TO_FILE_BS (1024llu * 4)
# define QEMU_MONITOR_MIGRATE_TO_FILE_TRANSFER_SIZE (1024llu * 1024)
int qemuMonitorMigrateToFile(qemuMonitorPtr mon,
unsigned int flags,
const char * const *argv,
const char *target,
unsigned long long offset);
int qemuMonitorMigrateToUnix(qemuMonitorPtr mon,
unsigned int flags,
const char *unixfile);
int qemuMonitorMigrateCancel(qemuMonitorPtr mon);
int qemuMonitorDumpToFd(qemuMonitorPtr mon,
int fd);
int qemuMonitorGraphicsRelocate(qemuMonitorPtr mon,
int type,
const char *hostname,
int port,
int tlsPort,
const char *tlsSubject);
/* XXX disk driver type eg, qcow/etc.
* XXX cache mode
*/
int qemuMonitorAddUSBDisk(qemuMonitorPtr mon,
const char *path);
int qemuMonitorAddUSBDeviceExact(qemuMonitorPtr mon,
int bus,
int dev);
int qemuMonitorAddUSBDeviceMatch(qemuMonitorPtr mon,
int vendor,
int product);
int qemuMonitorAddPCIHostDevice(qemuMonitorPtr mon,
virDevicePCIAddress *hostAddr,
virDevicePCIAddress *guestAddr);
/* XXX disk driver type eg, qcow/etc.
* XXX cache mode
*/
int qemuMonitorAddPCIDisk(qemuMonitorPtr mon,
const char *path,
const char *bus,
virDevicePCIAddress *guestAddr);
/* XXX do we really want to hardcode 'nicstr' as the
* sendable item here
*/
int qemuMonitorAddPCINetwork(qemuMonitorPtr mon,
const char *nicstr,
virDevicePCIAddress *guestAddr);
int qemuMonitorRemovePCIDevice(qemuMonitorPtr mon,
virDevicePCIAddress *guestAddr);
int qemuMonitorSendFileHandle(qemuMonitorPtr mon,
const char *fdname,
int fd);
int qemuMonitorAddFd(qemuMonitorPtr mon, int fdset, int fd, const char *name);
/* These two functions preserve previous error and only set their own
* error if no error was set before.
*/
int qemuMonitorCloseFileHandle(qemuMonitorPtr mon,
const char *fdname);
int qemuMonitorRemoveFd(qemuMonitorPtr mon, int fdset, int fd);
/* XXX do we really want to hardcode 'netstr' as the
* sendable item here
*/
int qemuMonitorAddHostNetwork(qemuMonitorPtr mon,
const char *netstr,
int *tapfd, char **tapfdName, int tapfdSize,
int *vhostfd, char **vhostfdName, int vhostfdSize);
int qemuMonitorRemoveHostNetwork(qemuMonitorPtr mon,
int vlan,
const char *netname);
int qemuMonitorAddNetdev(qemuMonitorPtr mon,
const char *netdevstr,
int *tapfd, char **tapfdName, int tapfdSize,
int *vhostfd, char **vhostfdName, int vhostfdSize);
int qemuMonitorRemoveNetdev(qemuMonitorPtr mon,
const char *alias);
int qemuMonitorGetPtyPaths(qemuMonitorPtr mon,
virHashTablePtr paths);
int qemuMonitorAttachPCIDiskController(qemuMonitorPtr mon,
const char *bus,
virDevicePCIAddress *guestAddr);
int qemuMonitorAttachDrive(qemuMonitorPtr mon,
const char *drivestr,
virDevicePCIAddress *controllerAddr,
virDomainDeviceDriveAddress *driveAddr);
typedef struct _qemuMonitorPCIAddress qemuMonitorPCIAddress;
struct _qemuMonitorPCIAddress {
unsigned int vendor;
unsigned int product;
virDevicePCIAddress addr;
};
int qemuMonitorGetAllPCIAddresses(qemuMonitorPtr mon,
qemuMonitorPCIAddress **addrs);
int qemuMonitorAddDevice(qemuMonitorPtr mon,
const char *devicestr);
int qemuMonitorAddDeviceWithFd(qemuMonitorPtr mon,
const char *devicestr,
int fd,
const char *fdname);
int qemuMonitorDelDevice(qemuMonitorPtr mon,
const char *devalias);
int qemuMonitorAddDrive(qemuMonitorPtr mon,
const char *drivestr);
int qemuMonitorDriveDel(qemuMonitorPtr mon,
const char *drivestr);
int qemuMonitorSetDrivePassphrase(qemuMonitorPtr mon,
const char *alias,
const char *passphrase);
int qemuMonitorCreateSnapshot(qemuMonitorPtr mon, const char *name);
int qemuMonitorLoadSnapshot(qemuMonitorPtr mon, const char *name);
int qemuMonitorDeleteSnapshot(qemuMonitorPtr mon, const char *name);
int qemuMonitorDiskSnapshot(qemuMonitorPtr mon,
snapshot: add support for qemu transaction command QEmu 1.1 is adding a 'transaction' command to the JSON monitor. Each element of a transaction corresponds to a top-level command, with the additional guarantee that the transaction flushes all pending I/O, then guarantees that all actions will be successful as a group or that failure will roll back the state to what it was before the monitor command. The difference between a top-level command: { "execute": "blockdev-snapshot-sync", "arguments": { "device": "virtio0", ... } } and a transaction: { "execute": "transaction", "arguments": { "actions": [ { "type": "blockdev-snapshot-sync", "data": { "device": "virtio0", ... } } ] } } is just a couple of changed key names and nesting the shorter command inside a JSON array to the longer command. This patch just adds the framework; the next patch will actually use a transaction. * src/qemu/qemu_monitor_json.c (qemuMonitorJSONMakeCommand): Move guts... (qemuMonitorJSONMakeCommandRaw): ...into new helper. Add support for array element. (qemuMonitorJSONTransaction): New command. (qemuMonitorJSONDiskSnapshot): Support use in a transaction. * src/qemu/qemu_monitor_json.h (qemuMonitorJSONDiskSnapshot): Add argument. (qemuMonitorJSONTransaction): New declaration. * src/qemu/qemu_monitor.h (qemuMonitorTransaction): Likewise. (qemuMonitorDiskSnapshot): Add argument. * src/qemu/qemu_monitor.c (qemuMonitorTransaction): New wrapper. (qemuMonitorDiskSnapshot): Pass argument on. * src/qemu/qemu_driver.c (qemuDomainSnapshotCreateSingleDiskActive): Update caller.
2012-03-17 04:17:28 +00:00
virJSONValuePtr actions,
const char *device,
snapshot: improve qemu handling of reused snapshot targets The oVirt developers have stated that the real reasons they want to have qemu reuse existing volumes when creating a snapshot are: 1. the management framework is set up so that creation has to be done from a central node for proper resource tracking, and having libvirt and/or qemu create things violates the framework, and 2. qemu defaults to creating snapshots with an absolute path to the backing file, but oVirt wants to manage a backing chain that uses just relative names, to allow for easier migration of a chain across storage locations. When 0.9.10 added VIR_DOMAIN_SNAPSHOT_CREATE_REUSE_EXT (commit 4e9953a4), it only addressed point 1, but libvirt was still using O_TRUNC which violates point 2. Meanwhile, the new qemu 'transaction' monitor command includes a new optional mode argument that will force qemu to reuse the metadata of the file it just opened (with the burden on the caller to have valid metadata there in the first place). So, this tweaks the meaning of the flag to cover both points as intended for use by oVirt. It is not strictly backward-compatible to 0.9.10 behavior, but it can be argued that the O_TRUNC of 0.9.10 was a bug. Note that this flag is all-or-nothing, and only selects between 'existing' and the default 'absolute-paths'. A more flexible approach that would allow per-disk selections, as well as adding support for the 'no-backing-file' mode, would be possible by extending the <domainsnapshot> xml to have a per-disk mode, but until we have a management application expressing a need for that additional complexity, it is not worth doing. * src/libvirt.c (virDomainSnapshotCreateXML): Tweak documentation. * src/qemu/qemu_monitor.h (qemuMonitorDiskSnapshot): Add parameters. * src/qemu/qemu_monitor_json.h (qemuMonitorJSONDiskSnapshot): Likewise. * src/qemu/qemu_monitor.c (qemuMonitorDiskSnapshot): Pass them through. * src/qemu/qemu_monitor_json.c (qemuMonitorJSONDiskSnapshot): Use new monitor command arguments. * src/qemu/qemu_driver.c (qemuDomainSnapshotCreateDiskActive) (qemuDomainSnapshotCreateSingleDiskActive): Adjust callers. (qemuDomainSnapshotDiskPrepare): Allow qed, modify rules on reuse.
2012-03-20 21:03:45 +00:00
const char *file,
const char *format,
bool reuse);
snapshot: add support for qemu transaction command QEmu 1.1 is adding a 'transaction' command to the JSON monitor. Each element of a transaction corresponds to a top-level command, with the additional guarantee that the transaction flushes all pending I/O, then guarantees that all actions will be successful as a group or that failure will roll back the state to what it was before the monitor command. The difference between a top-level command: { "execute": "blockdev-snapshot-sync", "arguments": { "device": "virtio0", ... } } and a transaction: { "execute": "transaction", "arguments": { "actions": [ { "type": "blockdev-snapshot-sync", "data": { "device": "virtio0", ... } } ] } } is just a couple of changed key names and nesting the shorter command inside a JSON array to the longer command. This patch just adds the framework; the next patch will actually use a transaction. * src/qemu/qemu_monitor_json.c (qemuMonitorJSONMakeCommand): Move guts... (qemuMonitorJSONMakeCommandRaw): ...into new helper. Add support for array element. (qemuMonitorJSONTransaction): New command. (qemuMonitorJSONDiskSnapshot): Support use in a transaction. * src/qemu/qemu_monitor_json.h (qemuMonitorJSONDiskSnapshot): Add argument. (qemuMonitorJSONTransaction): New declaration. * src/qemu/qemu_monitor.h (qemuMonitorTransaction): Likewise. (qemuMonitorDiskSnapshot): Add argument. * src/qemu/qemu_monitor.c (qemuMonitorTransaction): New wrapper. (qemuMonitorDiskSnapshot): Pass argument on. * src/qemu/qemu_driver.c (qemuDomainSnapshotCreateSingleDiskActive): Update caller.
2012-03-17 04:17:28 +00:00
int qemuMonitorTransaction(qemuMonitorPtr mon, virJSONValuePtr actions)
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
blockjob: add qemu capabilities related to block jobs Upstream qemu 1.3 is adding two new monitor commands, 'drive-mirror' and 'block-job-complete'[1], which can drive live block copy and storage migration. [Additionally, RHEL 6.3 had backported an earlier version of most of the same functionality, but under the names '__com.redhat_drive-mirror' and '__com.redhat_drive-reopen' and with slightly different JSON arguments, and has been using patches similar to these upstream patches for several months now.] The libvirt API virDomainBlockRebase as already committed for 0.9.12 is flexible enough to expose the basics of block copy, but some additional features in the 'drive-mirror' qemu command, such as setting error policy, setting granularity, or using a persistent bitmap, may later require a new libvirt API virDomainBlockCopy. I will wait to add that API until we know more about what qemu 1.3 will finally provide. This patch caters only to the upstream qemu 1.3 interface, although I have proven that the changes for RHEL 6.3 can be isolated to just qemu_monitor_json.c, and the rest of this series will gracefully handle either interface once the JSON differences are papered over in a downstream patch. For consistency with other block job commands, libvirt must handle the bandwidth argument as MiB/sec from the user, even though qemu exposes the speed argument as bytes/sec; then again, qemu rounds up to cluster size internally, so using MiB hides the worst effects of that rounding if you pass small numbers. [1]https://lists.gnu.org/archive/html/qemu-devel/2012-10/msg04123.html * src/qemu/qemu_capabilities.h (QEMU_CAPS_DRIVE_MIRROR) (QEMU_CAPS_DRIVE_REOPEN): New bits. * src/qemu/qemu_capabilities.c (qemuCaps): Name them. * src/qemu/qemu_monitor_json.c (qemuMonitorJSONCheckCommands): Set them. (qemuMonitorJSONDriveMirror, qemuMonitorDrivePivot): New functions. * src/qemu/qemu_monitor_json.h (qemuMonitorJSONDriveMirror) (qemuMonitorDrivePivot): Declare them. * src/qemu/qemu_monitor.c (qemuMonitorDriveMirror) (qemuMonitorDrivePivot): New passthroughs. * src/qemu/qemu_monitor.h (qemuMonitorDriveMirror) (qemuMonitorDrivePivot): Declare them.
2012-09-28 23:29:53 +00:00
int qemuMonitorDriveMirror(qemuMonitorPtr mon,
const char *device,
const char *file,
const char *format,
unsigned long bandwidth,
unsigned int flags)
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(3);
int qemuMonitorDrivePivot(qemuMonitorPtr mon,
const char *device,
const char *file,
const char *format)
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(3);
int qemuMonitorBlockCommit(qemuMonitorPtr mon,
const char *device,
const char *top,
const char *base,
unsigned long bandwidth)
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(3);
int qemuMonitorArbitraryCommand(qemuMonitorPtr mon,
const char *cmd,
char **reply,
bool hmp);
int qemuMonitorInjectNMI(qemuMonitorPtr mon);
int qemuMonitorScreendump(qemuMonitorPtr mon,
const char *file);
int qemuMonitorSendKey(qemuMonitorPtr mon,
unsigned int holdtime,
unsigned int *keycodes,
unsigned int nkeycodes);
typedef enum {
blockjob: fix block-stream bandwidth race With RHEL 6.2, virDomainBlockPull(dom, dev, bandwidth, 0) has a race with non-zero bandwidth: there is a window between the block_stream and block_job_set_speed monitor commands where an unlimited amount of data was let through, defeating the point of a throttle. This race was first identified in commit a9d3495e, and libvirt was able to reduce the size of the window for that race. In the meantime, the qemu developers decided to fix things properly; per this message: https://lists.gnu.org/archive/html/qemu-devel/2012-04/msg03793.html the fix will be in qemu 1.1, and changes block-job-set-speed to use a different parameter name, as well as adding a new optional parameter to block-stream, which eliminates the race altogether. Since our documentation already mentioned that we can refuse a non-zero bandwidth for some hypervisors, I think the best solution is to do just that for RHEL 6.2 qemu, so that the race is obvious to the user (anyone using stock RHEL 6.2 binaries won't have this patch, and anyone building their own libvirt with this patch for RHEL can also rebuild qemu to get the modern semantics, so it is no real loss in behavior). Meanwhile the code must be fixed to honor actual qemu 1.1 naming. Rename the parameter to 'modern', since the naming difference now covers more than just 'async' block-job-cancel. And while at it, fix an unchecked integer overflow. * src/qemu/qemu_monitor.h (enum BLOCK_JOB_CMD): Drop unused value, rename enum to match conventions. * src/qemu/qemu_monitor.c (qemuMonitorBlockJob): Reflect enum rename. * src/qemu_qemu_monitor_json.h (qemuMonitorJSONBlockJob): Likewise. * src/qemu/qemu_monitor_json.c (qemuMonitorJSONBlockJob): Likewise, and support difference between RHEL 6.2 and qemu 1.1 block pull. * src/qemu/qemu_driver.c (qemuDomainBlockJobImpl): Reject bandwidth during pull with too-old qemu. * src/libvirt.c (virDomainBlockPull, virDomainBlockRebase): Document this.
2012-04-25 22:49:44 +00:00
BLOCK_JOB_ABORT,
BLOCK_JOB_INFO,
BLOCK_JOB_SPEED,
BLOCK_JOB_PULL,
} qemuMonitorBlockJobCmd;
int qemuMonitorBlockJob(qemuMonitorPtr mon,
const char *device,
const char *back,
unsigned long bandwidth,
virDomainBlockJobInfoPtr info,
blockjob: fix block-stream bandwidth race With RHEL 6.2, virDomainBlockPull(dom, dev, bandwidth, 0) has a race with non-zero bandwidth: there is a window between the block_stream and block_job_set_speed monitor commands where an unlimited amount of data was let through, defeating the point of a throttle. This race was first identified in commit a9d3495e, and libvirt was able to reduce the size of the window for that race. In the meantime, the qemu developers decided to fix things properly; per this message: https://lists.gnu.org/archive/html/qemu-devel/2012-04/msg03793.html the fix will be in qemu 1.1, and changes block-job-set-speed to use a different parameter name, as well as adding a new optional parameter to block-stream, which eliminates the race altogether. Since our documentation already mentioned that we can refuse a non-zero bandwidth for some hypervisors, I think the best solution is to do just that for RHEL 6.2 qemu, so that the race is obvious to the user (anyone using stock RHEL 6.2 binaries won't have this patch, and anyone building their own libvirt with this patch for RHEL can also rebuild qemu to get the modern semantics, so it is no real loss in behavior). Meanwhile the code must be fixed to honor actual qemu 1.1 naming. Rename the parameter to 'modern', since the naming difference now covers more than just 'async' block-job-cancel. And while at it, fix an unchecked integer overflow. * src/qemu/qemu_monitor.h (enum BLOCK_JOB_CMD): Drop unused value, rename enum to match conventions. * src/qemu/qemu_monitor.c (qemuMonitorBlockJob): Reflect enum rename. * src/qemu_qemu_monitor_json.h (qemuMonitorJSONBlockJob): Likewise. * src/qemu/qemu_monitor_json.c (qemuMonitorJSONBlockJob): Likewise, and support difference between RHEL 6.2 and qemu 1.1 block pull. * src/qemu/qemu_driver.c (qemuDomainBlockJobImpl): Reject bandwidth during pull with too-old qemu. * src/libvirt.c (virDomainBlockPull, virDomainBlockRebase): Document this.
2012-04-25 22:49:44 +00:00
qemuMonitorBlockJobCmd mode,
bool modern)
blockjob: add qemu capabilities related to block pull jobs RHEL 6.2 was released with an early version of block jobs, which only worked on the qed file format, where the commands were spelled with underscore (contrary to QMP style), and where 'block_job_cancel' was synchronous and did not trigger an event. The upcoming qemu 1.1 release has fixed these short-comings [1][2]: the commands now work on multiple file types, are spelled with dash, and 'block-job-cancel' is asynchronous and emits an event upon conclusion. [1]qemu commit 370521a1d6f5537ea7271c119f3fbb7b0fa57063 [2]https://lists.gnu.org/archive/html/qemu-devel/2012-04/msg01248.html This patch recognizes the new spellings, and fixes virDomainBlockRebase to give a graceful error when talking to a too-old qemu on a partial rebase attempt. Fixes for the new semantics will come later. This patch also removes a bogus ATTRIBUTE_NONNULL mistakenly added in commit 10ec36e2. * src/qemu/qemu_capabilities.h (QEMU_CAPS_BLOCKJOB_SYNC) (QEMU_CAPS_BLOCKJOB_ASYNC): New bits. * src/qemu/qemu_capabilities.c (qemuCaps): Name them. * src/qemu/qemu_monitor_json.c (qemuMonitorJSONCheckCommands): Set them. (qemuMonitorJSONBlockJob): Manage both command names. (qemuMonitorJSONDiskSnapshot): Minor formatting fix. * src/qemu/qemu_monitor.h (qemuMonitorBlockJob): Alter signature. * src/qemu/qemu_monitor_json.h (qemuMonitorJSONBlockJob): Likewise. * src/qemu/qemu_monitor.c (qemuMonitorBlockJob): Pass through capability bit. * src/qemu/qemu_driver.c (qemuDomainBlockJobImpl): Update callers.
2012-04-11 21:40:16 +00:00
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
int qemuMonitorOpenGraphics(qemuMonitorPtr mon,
const char *protocol,
int fd,
const char *fdname,
bool skipauth);
int qemuMonitorSetBlockIoThrottle(qemuMonitorPtr mon,
const char *device,
virDomainBlockIoTuneInfoPtr info);
int qemuMonitorGetBlockIoThrottle(qemuMonitorPtr mon,
const char *device,
virDomainBlockIoTuneInfoPtr reply);
int qemuMonitorSystemWakeup(qemuMonitorPtr mon);
int qemuMonitorGetVersion(qemuMonitorPtr mon,
int *major,
int *minor,
int *micro,
char **package)
ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(3) ATTRIBUTE_NONNULL(4);
typedef struct _qemuMonitorMachineInfo qemuMonitorMachineInfo;
typedef qemuMonitorMachineInfo *qemuMonitorMachineInfoPtr;
struct _qemuMonitorMachineInfo {
char *name;
bool isDefault;
char *alias;
unsigned int maxCpus;
};
int qemuMonitorGetMachines(qemuMonitorPtr mon,
qemuMonitorMachineInfoPtr **machines);
void qemuMonitorMachineInfoFree(qemuMonitorMachineInfoPtr machine);
int qemuMonitorGetCPUDefinitions(qemuMonitorPtr mon,
char ***cpus);
int qemuMonitorGetCommands(qemuMonitorPtr mon,
char ***commands);
int qemuMonitorGetEvents(qemuMonitorPtr mon,
char ***events);
int qemuMonitorGetCommandLineOptionParameters(qemuMonitorPtr mon,
const char *option,
char ***params);
int qemuMonitorGetKVMState(qemuMonitorPtr mon,
bool *enabled,
bool *present);
int qemuMonitorGetObjectTypes(qemuMonitorPtr mon,
char ***types);
int qemuMonitorGetObjectProps(qemuMonitorPtr mon,
const char *type,
char ***props);
char *qemuMonitorGetTargetArch(qemuMonitorPtr mon);
int qemuMonitorNBDServerStart(qemuMonitorPtr mon,
const char *host,
unsigned int port);
int qemuMonitorNBDServerAdd(qemuMonitorPtr mon,
const char *deviceID,
bool writable);
int qemuMonitorNBDServerStop(qemuMonitorPtr);
int qemuMonitorGetTPMModels(qemuMonitorPtr mon,
char ***tpmmodels);
int qemuMonitorGetTPMTypes(qemuMonitorPtr mon,
char ***tpmtypes);
int qemuMonitorAttachCharDev(qemuMonitorPtr mon,
const char *chrID,
virDomainChrSourceDefPtr chr);
int qemuMonitorDetachCharDev(qemuMonitorPtr mon,
const char *chrID);
int qemuMonitorGetDeviceAliases(qemuMonitorPtr mon,
char ***aliases);
int qemuMonitorSetDomainLog(qemuMonitorPtr mon, int logfd);
int qemuMonitorGetGuestCPU(qemuMonitorPtr mon,
virArch arch,
virCPUDataPtr *data);
/**
* When running two dd process and using <> redirection, we need a
* shell that will not truncate files. These two strings serve that
* purpose.
*/
# ifdef VIR_WRAPPER_SHELL
# define VIR_WRAPPER_SHELL_PREFIX VIR_WRAPPER_SHELL " -c '"
# define VIR_WRAPPER_SHELL_SUFFIX "'"
# else
# define VIR_WRAPPER_SHELL_PREFIX /* nothing */
# define VIR_WRAPPER_SHELL_SUFFIX /* nothing */
# endif
#endif /* QEMU_MONITOR_H */