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Viewing changes to include/migration/migration.h

  • Committer: Phil Dennis-Jordan
  • Date: 2017-07-21 08:03:43 UTC
  • mfrom: (1.1.1)
  • Revision ID: phil@philjordan.eu-20170721080343-2yr2vdj7713czahv
New upstream release 2.9.0.

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include/migration/migration.h
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#include "qapi-types.h"
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#include "exec/cpu-common.h"
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#include "qemu/coroutine_int.h"
 
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#include "qom/object.h"
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#define QEMU_VM_FILE_MAGIC           0x5145564d
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#define QEMU_VM_FILE_VERSION_COMPAT  0x00000002
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#define QEMU_VM_COMMAND              0x08
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#define QEMU_VM_SECTION_FOOTER       0x7e
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/* for vl.c */
 
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extern int only_migratable;
 
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struct MigrationParams {
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    bool blk;
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    bool shared;
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     */
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    QemuEvent main_thread_load_event;
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    size_t         largest_page_size;
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    bool           have_fault_thread;
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    QemuThread     fault_thread;
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    QemuSemaphore  fault_thread_sem;
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    QEMUFile *to_src_file;
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    QemuMutex rp_mutex;    /* We send replies from multiple threads */
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    void     *postcopy_tmp_page;
 
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    void     *postcopy_tmp_zero_page;
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    QEMUBH *bh;
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    QemuThread colo_incoming_thread;
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    /* The coroutine we should enter (back) after failover */
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    Coroutine *migration_incoming_co;
 
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    QemuSemaphore colo_incoming_sem;
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    /* See savevm.c */
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    LoadStateEntry_Head loadvm_handlers;
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};
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MigrationIncomingState *migration_incoming_get_current(void);
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MigrationIncomingState *migration_incoming_state_new(QEMUFile *f);
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void migration_incoming_state_destroy(void);
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/*
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    /* Flag set once the migration thread is running (and needs joining) */
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    bool migration_thread_running;
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    /* Flag set once the migration thread called bdrv_inactivate_all */
 
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    bool block_inactive;
 
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    /* Queue of outstanding page requests from the destination */
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    QemuMutex src_page_req_mutex;
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    QSIMPLEQ_HEAD(src_page_requests, MigrationSrcPageRequest) src_page_requests;
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    /* The RAMBlock used in the last src_page_request */
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    RAMBlock *last_req_rb;
 
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    /* The semaphore is used to notify COLO thread that failover is finished */
 
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    QemuSemaphore colo_exit_sem;
 
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    /* The semaphore is used to notify COLO thread to do checkpoint */
 
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    QemuSemaphore colo_checkpoint_sem;
 
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    int64_t colo_checkpoint_time;
 
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    QEMUTimer *colo_delay_timer;
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    /* The last error that occurred */
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    Error *error;
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MigrationState *migrate_init(const MigrationParams *params);
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bool migration_is_blocked(Error **errp);
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bool migration_in_setup(MigrationState *);
 
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bool migration_is_idle(MigrationState *s);
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bool migration_has_finished(MigrationState *);
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bool migration_has_failed(MigrationState *);
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/* True if outgoing migration has entered postcopy phase */
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int ram_discard_range(MigrationIncomingState *mis, const char *block_name,
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                      uint64_t start, size_t length);
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int ram_postcopy_incoming_init(MigrationIncomingState *mis);
 
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void ram_postcopy_migrated_memory_release(MigrationState *ms);
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/**
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 * @migrate_add_blocker - prevent migration from proceeding
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 *
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 * @reason - an error to be returned whenever migration is attempted
 
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 *
 
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 * @errp - [out] The reason (if any) we cannot block migration right now.
 
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 *
 
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 * @returns - 0 on success, -EBUSY/-EACCES on failure, with errp set.
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 */
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void migrate_add_blocker(Error *reason);
 
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int migrate_add_blocker(Error *reason, Error **errp);
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/**
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 * @migrate_del_blocker - remove a blocking error from migration
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 */
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void migrate_del_blocker(Error *reason);
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int check_migratable(Object *obj, Error **err);
 
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bool migrate_release_ram(void);
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bool migrate_postcopy_ram(void);
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bool migrate_zero_blocks(void);
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void flush_page_queue(MigrationState *ms);
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int ram_save_queue_pages(MigrationState *ms, const char *rbname,
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                         ram_addr_t start, ram_addr_t len);
 
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uint64_t ram_pagesize_summary(void);
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PostcopyState postcopy_state_get(void);
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/* Set the state and return the old state */