qemu_domain.h

/*
 * qemu_domain.h: QEMU domain private state
 *
 * 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_DOMAIN_H__
# define __QEMU_DOMAIN_H__

# include "virthread.h"
# include "vircgroup.h"
# include "domain_addr.h"
# include "domain_conf.h"
# include "snapshot_conf.h"
# include "qemu_monitor.h"
# include "qemu_agent.h"
# include "qemu_conf.h"
# include "qemu_capabilities.h"
# include "virchrdev.h"
# include "virobject.h"

# define QEMU_DOMAIN_FORMAT_LIVE_FLAGS      \
    (VIR_DOMAIN_XML_SECURE |                \
     VIR_DOMAIN_XML_UPDATE_CPU)

# if ULONG_MAX == 4294967295
/* Qemu has a 64-bit limit, but we are limited by our historical choice of
 * representing bandwidth in a long instead of a 64-bit int.  */
#  define QEMU_DOMAIN_MIG_BANDWIDTH_MAX ULONG_MAX
# else
#  define QEMU_DOMAIN_MIG_BANDWIDTH_MAX (INT64_MAX / (1024 * 1024))
# endif

# define JOB_MASK(job)                  (1 << (job - 1))
# define QEMU_JOB_DEFAULT_MASK          \
    (JOB_MASK(QEMU_JOB_QUERY) |         \
     JOB_MASK(QEMU_JOB_DESTROY) |       \
     JOB_MASK(QEMU_JOB_ABORT))

/* Jobs which have to be tracked in domain state XML. */
# define QEMU_DOMAIN_TRACK_JOBS         \
    (JOB_MASK(QEMU_JOB_DESTROY) |       \
     JOB_MASK(QEMU_JOB_ASYNC))

/* Only 1 job is allowed at any time
 * A job includes *all* monitor commands, even those just querying
 * information, not merely actions */
typedef enum {
    QEMU_JOB_NONE = 0,  /* Always set to 0 for easy if (jobActive) conditions */
    QEMU_JOB_QUERY,         /* Doesn't change any state */
    QEMU_JOB_DESTROY,       /* Destroys the domain (cannot be masked out) */
    QEMU_JOB_SUSPEND,       /* Suspends (stops vCPUs) the domain */
    QEMU_JOB_MODIFY,        /* May change state */
    QEMU_JOB_ABORT,         /* Abort current async job */
    QEMU_JOB_MIGRATION_OP,  /* Operation influencing outgoing migration */

    /* The following two items must always be the last items before JOB_LAST */
    QEMU_JOB_ASYNC,         /* Asynchronous job */
    QEMU_JOB_ASYNC_NESTED,  /* Normal job within an async job */

    QEMU_JOB_LAST
} qemuDomainJob;
VIR_ENUM_DECL(qemuDomainJob)

/* Async job consists of a series of jobs that may change state. Independent
 * jobs that do not change state (and possibly others if explicitly allowed by
 * current async job) are allowed to be run even if async job is active.
 */
typedef enum {
    QEMU_ASYNC_JOB_NONE = 0,
    QEMU_ASYNC_JOB_MIGRATION_OUT,
    QEMU_ASYNC_JOB_MIGRATION_IN,
    QEMU_ASYNC_JOB_SAVE,
    QEMU_ASYNC_JOB_DUMP,
    QEMU_ASYNC_JOB_SNAPSHOT,
    QEMU_ASYNC_JOB_START,

    QEMU_ASYNC_JOB_LAST
} qemuDomainAsyncJob;
VIR_ENUM_DECL(qemuDomainAsyncJob)

typedef struct _qemuDomainJobInfo qemuDomainJobInfo;
typedef qemuDomainJobInfo *qemuDomainJobInfoPtr;
struct _qemuDomainJobInfo {
    virDomainJobType type;
    unsigned long long started; /* When the async job started */
    unsigned long long stopped; /* When the domain's CPUs were stopped */
    unsigned long long sent; /* When the source sent status info to the
                                destination (only for migrations). */
    unsigned long long received; /* When the destination host received status
                                    info from the source (migrations only). */
    /* Computed values */
    unsigned long long timeElapsed;
    unsigned long long timeRemaining;
    long long timeDelta; /* delta = received - sent, i.e., the difference
                            between the source and the destination time plus
                            the time between the end of Perform phase on the
                            source and the beginning of Finish phase on the
                            destination. */
    bool timeDeltaSet;
    /* Raw values from QEMU */
    qemuMonitorMigrationStats stats;
};

struct qemuDomainJobObj {
    virCond cond;                       /* Use to coordinate jobs */
    qemuDomainJob active;               /* Currently running job */
    unsigned long long owner;           /* Thread id which set current job */
    const char *ownerAPI;               /* The API which owns the job */
    unsigned long long started;         /* When the current job started */

    virCond asyncCond;                  /* Use to coordinate with async jobs */
    qemuDomainAsyncJob asyncJob;        /* Currently active async job */
    unsigned long long asyncOwner;      /* Thread which set current async job */
    const char *asyncOwnerAPI;          /* The API which owns the async job */
    unsigned long long asyncStarted;    /* When the current async job started */
    int phase;                          /* Job phase (mainly for migrations) */
    unsigned long long mask;            /* Jobs allowed during async job */
    bool dump_memory_only;              /* use dump-guest-memory to do dump */
    qemuDomainJobInfoPtr current;       /* async job progress data */
    qemuDomainJobInfoPtr completed;     /* statistics data of a recently completed job */
    bool abortJob;                      /* abort of the job requested */
    bool spiceMigrated;                 /* spice migration completed */
};

typedef void (*qemuDomainCleanupCallback)(virQEMUDriverPtr driver,
                                          virDomainObjPtr vm);

typedef struct _qemuDomainObjPrivate qemuDomainObjPrivate;
typedef qemuDomainObjPrivate *qemuDomainObjPrivatePtr;
struct _qemuDomainObjPrivate {
    struct qemuDomainJobObj job;

    qemuMonitorPtr mon;
    virDomainChrSourceDefPtr monConfig;
    bool monJSON;
    bool monError;
    unsigned long long monStart;

    qemuAgentPtr agent;
    bool agentError;
    unsigned long long agentStart;

    bool gotShutdown;
    bool beingDestroyed;
    char *pidfile;

    int nvcpupids;
    int *vcpupids;

    virDomainPCIAddressSetPtr pciaddrs;
    virDomainCCWAddressSetPtr ccwaddrs;
    virDomainVirtioSerialAddrSetPtr vioserialaddrs;
    int persistentAddrs;

    virQEMUCapsPtr qemuCaps;
    char *lockState;

    bool fakeReboot;

    int jobs_queued;

    unsigned long migMaxBandwidth;
    char *origname;
    int nbdPort; /* Port used for migration with NBD */
    unsigned short migrationPort;
    int preMigrationState;

    virChrdevsPtr devs;

    qemuDomainCleanupCallback *cleanupCallbacks;
    size_t ncleanupCallbacks;
    size_t ncleanupCallbacks_max;

    virCgroupPtr cgroup;

    virCond unplugFinished; /* signals that unpluggingDevice was unplugged */
    const char *unpluggingDevice; /* alias of the device that is being unplugged */
    char **qemuDevices; /* NULL-terminated list of devices aliases known to QEMU */

    bool hookRun;  /* true if there was a hook run over this domain */

    /* Bitmaps below hold data from the auto NUMA feature */
    virBitmapPtr autoNodeset;
    virBitmapPtr autoCpuset;

    bool signalIOError; /* true if the domain condition should be signalled on
                           I/O error */
    char *machineName;
    char *libDir;            /* base path for per-domain files */
    char *channelTargetDir;  /* base path for per-domain channel targets */
};

# define QEMU_DOMAIN_DISK_PRIVATE(disk)	\
    ((qemuDomainDiskPrivatePtr) (disk)->privateData)

typedef struct _qemuDomainDiskPrivate qemuDomainDiskPrivate;
typedef qemuDomainDiskPrivate *qemuDomainDiskPrivatePtr;
struct _qemuDomainDiskPrivate {
    virObject parent;

    /* ideally we want a smarter way to interlock block jobs on single qemu disk
     * in the future, but for now we just disallow any concurrent job on a
     * single disk */
    bool blockjob;

    /* for some synchronous block jobs, we need to notify the owner */
    int blockJobType;   /* type of the block job from the event */
    int blockJobStatus; /* status of the finished block job */
    bool blockJobSync; /* the block job needs synchronized termination */

    bool migrating; /* the disk is being migrated */
};

typedef enum {
    QEMU_PROCESS_EVENT_WATCHDOG = 0,
    QEMU_PROCESS_EVENT_GUESTPANIC,
    QEMU_PROCESS_EVENT_DEVICE_DELETED,
    QEMU_PROCESS_EVENT_NIC_RX_FILTER_CHANGED,
    QEMU_PROCESS_EVENT_SERIAL_CHANGED,
    QEMU_PROCESS_EVENT_BLOCK_JOB,
    QEMU_PROCESS_EVENT_MONITOR_EOF,

    QEMU_PROCESS_EVENT_LAST
} qemuProcessEventType;

struct qemuProcessEvent {
    virDomainObjPtr vm;
    qemuProcessEventType eventType;
    int action;
    int status;
    void *data;
};

typedef struct _qemuDomainLogContext qemuDomainLogContext;
typedef qemuDomainLogContext *qemuDomainLogContextPtr;

const char *qemuDomainAsyncJobPhaseToString(qemuDomainAsyncJob job,
                                            int phase);
int qemuDomainAsyncJobPhaseFromString(qemuDomainAsyncJob job,
                                      const char *phase);

void qemuDomainEventFlush(int timer, void *opaque);

void qemuDomainEventQueue(virQEMUDriverPtr driver,
                          virObjectEventPtr event);

int qemuDomainObjBeginJob(virQEMUDriverPtr driver,
                          virDomainObjPtr obj,
                          qemuDomainJob job)
    ATTRIBUTE_RETURN_CHECK;
int qemuDomainObjBeginAsyncJob(virQEMUDriverPtr driver,
                               virDomainObjPtr obj,
                               qemuDomainAsyncJob asyncJob)
    ATTRIBUTE_RETURN_CHECK;
int qemuDomainObjBeginNestedJob(virQEMUDriverPtr driver,
                                virDomainObjPtr obj,
                                qemuDomainAsyncJob asyncJob)
    ATTRIBUTE_RETURN_CHECK;

void qemuDomainObjEndJob(virQEMUDriverPtr driver,
                         virDomainObjPtr obj);
void qemuDomainObjEndAsyncJob(virQEMUDriverPtr driver,
                              virDomainObjPtr obj);
void qemuDomainObjAbortAsyncJob(virDomainObjPtr obj);
void qemuDomainObjSetJobPhase(virQEMUDriverPtr driver,
                              virDomainObjPtr obj,
                              int phase);
void qemuDomainObjSetAsyncJobMask(virDomainObjPtr obj,
                                  unsigned long long allowedJobs);
void qemuDomainObjRestoreJob(virDomainObjPtr obj,
                             struct qemuDomainJobObj *job);
void qemuDomainObjDiscardAsyncJob(virQEMUDriverPtr driver,
                                  virDomainObjPtr obj);
void qemuDomainObjReleaseAsyncJob(virDomainObjPtr obj);

qemuMonitorPtr qemuDomainGetMonitor(virDomainObjPtr vm)
    ATTRIBUTE_NONNULL(1);
void qemuDomainObjEnterMonitor(virQEMUDriverPtr driver,
                               virDomainObjPtr obj)
    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
int qemuDomainObjExitMonitor(virQEMUDriverPtr driver,
                             virDomainObjPtr obj)
    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2)
    ATTRIBUTE_RETURN_CHECK;
int qemuDomainObjEnterMonitorAsync(virQEMUDriverPtr driver,
                                   virDomainObjPtr obj,
                                   qemuDomainAsyncJob asyncJob)
    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;


qemuAgentPtr qemuDomainGetAgent(virDomainObjPtr vm);
void qemuDomainObjEnterAgent(virDomainObjPtr obj)
    ATTRIBUTE_NONNULL(1);
void qemuDomainObjExitAgent(virDomainObjPtr obj)
    ATTRIBUTE_NONNULL(1);


void qemuDomainObjEnterRemote(virDomainObjPtr obj)
    ATTRIBUTE_NONNULL(1);
void qemuDomainObjExitRemote(virDomainObjPtr obj)
    ATTRIBUTE_NONNULL(1);

virDomainDefPtr qemuDomainDefCopy(virQEMUDriverPtr driver,
                                  virDomainDefPtr src,
                                  unsigned int flags);

int qemuDomainDefFormatBuf(virQEMUDriverPtr driver,
                           virDomainDefPtr vm,
                           unsigned int flags,
                           virBuffer *buf);

char *qemuDomainDefFormatXML(virQEMUDriverPtr driver,
                             virDomainDefPtr vm,
                             unsigned int flags);

char *qemuDomainFormatXML(virQEMUDriverPtr driver,
                          virDomainObjPtr vm,
                          unsigned int flags);

char *qemuDomainDefFormatLive(virQEMUDriverPtr driver,
                              virDomainDefPtr def,
                              bool inactive,
                              bool compatible);

void qemuDomainObjTaint(virQEMUDriverPtr driver,
                        virDomainObjPtr obj,
                        virDomainTaintFlags taint,
                        qemuDomainLogContextPtr logCtxt);

void qemuDomainObjCheckTaint(virQEMUDriverPtr driver,
                             virDomainObjPtr obj,
                             qemuDomainLogContextPtr logCtxt);
void qemuDomainObjCheckDiskTaint(virQEMUDriverPtr driver,
                                 virDomainObjPtr obj,
                                 virDomainDiskDefPtr disk,
                                 qemuDomainLogContextPtr logCtxt);
void qemuDomainObjCheckHostdevTaint(virQEMUDriverPtr driver,
                                    virDomainObjPtr obj,
                                    virDomainHostdevDefPtr disk,
                                    qemuDomainLogContextPtr logCtxt);
void qemuDomainObjCheckNetTaint(virQEMUDriverPtr driver,
                                virDomainObjPtr obj,
                                virDomainNetDefPtr net,
                                qemuDomainLogContextPtr logCtxt);

typedef enum {
    QEMU_DOMAIN_LOG_CONTEXT_MODE_START,
    QEMU_DOMAIN_LOG_CONTEXT_MODE_ATTACH,
    QEMU_DOMAIN_LOG_CONTEXT_MODE_STOP,
} qemuDomainLogContextMode;

qemuDomainLogContextPtr qemuDomainLogContextNew(virQEMUDriverPtr driver,
                                                virDomainObjPtr vm,
                                                qemuDomainLogContextMode mode);
int qemuDomainLogContextWrite(qemuDomainLogContextPtr ctxt,
                              const char *fmt, ...) ATTRIBUTE_FMT_PRINTF(2, 3);
ssize_t qemuDomainLogContextRead(qemuDomainLogContextPtr ctxt,
                                 char **msg);
int qemuDomainLogContextGetWriteFD(qemuDomainLogContextPtr ctxt);
void qemuDomainLogContextMarkPosition(qemuDomainLogContextPtr ctxt);
void qemuDomainLogContextRef(qemuDomainLogContextPtr ctxt);
void qemuDomainLogContextFree(qemuDomainLogContextPtr ctxt);

const char *qemuFindQemuImgBinary(virQEMUDriverPtr driver);

int qemuDomainSnapshotWriteMetadata(virDomainObjPtr vm,
                                    virDomainSnapshotObjPtr snapshot,
                                    virCapsPtr caps,
                                    char *snapshotDir);

int qemuDomainSnapshotForEachQcow2(virQEMUDriverPtr driver,
                                   virDomainObjPtr vm,
                                   virDomainSnapshotObjPtr snap,
                                   const char *op,
                                   bool try_all);

int qemuDomainSnapshotDiscard(virQEMUDriverPtr driver,
                              virDomainObjPtr vm,
                              virDomainSnapshotObjPtr snap,
                              bool update_current,
                              bool metadata_only);

typedef struct _virQEMUSnapRemove virQEMUSnapRemove;
typedef virQEMUSnapRemove *virQEMUSnapRemovePtr;
struct _virQEMUSnapRemove {
    virQEMUDriverPtr driver;
    virDomainObjPtr vm;
    int err;
    bool metadata_only;
    bool current;
};

int qemuDomainSnapshotDiscardAll(void *payload,
                                 const void *name,
                                 void *data);

int qemuDomainSnapshotDiscardAllMetadata(virQEMUDriverPtr driver,
                                         virDomainObjPtr vm);

void qemuDomainRemoveInactive(virQEMUDriverPtr driver,
                              virDomainObjPtr vm);

void qemuDomainSetFakeReboot(virQEMUDriverPtr driver,
                             virDomainObjPtr vm,
                             bool value);

bool qemuDomainJobAllowed(qemuDomainObjPrivatePtr priv,
                          qemuDomainJob job);

int qemuDomainCheckDiskPresence(virQEMUDriverPtr driver,
                                virDomainObjPtr vm,
                                bool start_with_state);

int qemuDomainDetermineDiskChain(virQEMUDriverPtr driver,
                                 virDomainObjPtr vm,
                                 virDomainDiskDefPtr disk,
                                 bool force_probe,
                                 bool report_broken);

bool qemuDomainDiskSourceDiffers(virConnectPtr conn,
                                 virDomainDiskDefPtr disk,
                                 virDomainDiskDefPtr origDisk);

bool qemuDomainDiskChangeSupported(virDomainDiskDefPtr disk,
                                   virDomainDiskDefPtr orig_disk);

int qemuDomainStorageFileInit(virQEMUDriverPtr driver,
                              virDomainObjPtr vm,
                              virStorageSourcePtr src);
char *qemuDomainStorageAlias(const char *device, int depth);

int qemuDomainCleanupAdd(virDomainObjPtr vm,
                         qemuDomainCleanupCallback cb);
void qemuDomainCleanupRemove(virDomainObjPtr vm,
                             qemuDomainCleanupCallback cb);
void qemuDomainCleanupRun(virQEMUDriverPtr driver,
                          virDomainObjPtr vm);

extern virDomainXMLPrivateDataCallbacks virQEMUDriverPrivateDataCallbacks;
extern virDomainXMLNamespace virQEMUDriverDomainXMLNamespace;
extern virDomainDefParserConfig virQEMUDriverDomainDefParserConfig;

int qemuDomainUpdateDeviceList(virQEMUDriverPtr driver,
                               virDomainObjPtr vm, int asyncJob);

int qemuDomainUpdateMemoryDeviceInfo(virQEMUDriverPtr driver,
                                     virDomainObjPtr vm,
                                     int asyncJob);

bool qemuDomainDefCheckABIStability(virQEMUDriverPtr driver,
                                    virDomainDefPtr src,
                                    virDomainDefPtr dst);

bool qemuDomainAgentAvailable(virDomainObjPtr vm,
                              bool reportError);

int qemuDomainJobInfoUpdateTime(qemuDomainJobInfoPtr jobInfo)
    ATTRIBUTE_NONNULL(1);
int qemuDomainJobInfoUpdateDowntime(qemuDomainJobInfoPtr jobInfo)
    ATTRIBUTE_NONNULL(1);
int qemuDomainJobInfoToInfo(qemuDomainJobInfoPtr jobInfo,
                            virDomainJobInfoPtr info)
    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
int qemuDomainJobInfoToParams(qemuDomainJobInfoPtr jobInfo,
                              int *type,
                              virTypedParameterPtr *params,
                              int *nparams)
    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2)
    ATTRIBUTE_NONNULL(3) ATTRIBUTE_NONNULL(4);

int qemuDomainSupportsBlockJobs(virDomainObjPtr vm, bool *modern)
    ATTRIBUTE_NONNULL(1);
bool qemuDomainDiskBlockJobIsActive(virDomainDiskDefPtr disk);
bool qemuDomainHasBlockjob(virDomainObjPtr vm, bool copy_only)
    ATTRIBUTE_NONNULL(1);

int qemuDomainAlignMemorySizes(virDomainDefPtr def);
void qemuDomainMemoryDeviceAlignSize(virDomainDefPtr def,
                                     virDomainMemoryDefPtr mem);

virDomainChrDefPtr qemuFindAgentConfig(virDomainDefPtr def);

bool qemuDomainMachineIsQ35(const virDomainDef *def);
bool qemuDomainMachineIsI440FX(const virDomainDef *def);
bool qemuDomainMachineNeedsFDC(const virDomainDef *def);
bool qemuDomainMachineIsS390CCW(const virDomainDef *def);
bool qemuDomainMachineHasBuiltinIDE(const virDomainDef *def);

int qemuDomainUpdateCurrentMemorySize(virQEMUDriverPtr driver,
                                      virDomainObjPtr vm);

unsigned long long qemuDomainGetMemLockLimitBytes(virDomainDefPtr def);
bool qemuDomainRequiresMemLock(virDomainDefPtr def);
int qemuDomainAdjustMaxMemLock(virDomainObjPtr vm);

int qemuDomainDefValidateMemoryHotplug(const virDomainDef *def,
                                       virQEMUCapsPtr qemuCaps,
                                       const virDomainMemoryDef *mem);

bool qemuDomainHasVcpuPids(virDomainObjPtr vm);
pid_t qemuDomainGetVcpuPid(virDomainObjPtr vm, unsigned int vcpu);
int qemuDomainDetectVcpuPids(virQEMUDriverPtr driver, virDomainObjPtr vm,
                             int asyncJob);

bool qemuDomainSupportsNicdev(virDomainDefPtr def,
                              virQEMUCapsPtr qemuCaps,
                              virDomainNetDefPtr net);

bool qemuDomainSupportsNetdev(virDomainDefPtr def,
                              virQEMUCapsPtr qemuCaps,
                              virDomainNetDefPtr net);

int qemuDomainNetVLAN(virDomainNetDefPtr def);

int qemuDomainSetPrivatePaths(char **domainLibDir,
                              char **domainChannelTargetDir,
                              const char *confLibDir,
                              const char *confChannelDir,
                              const char *domainName,
                              int domainId);
#endif /* __QEMU_DOMAIN_H__ */