c163b5cae9
This patch introduces block migration called during live migration. Block are being copied to the destination in an async way. First the code will transfer the whole disk and then transfer all dirty blocks accumulted during the migration. Still need to improve transition from the iterative phase of migration to the end phase. For now transition will take place when all blocks transfered once, all the dirty blocks will be transfered during the end phase (guest is suspended). Changes from v4: - Global variabels moved to a global state structure allocated dynamically. - Minor coding style issues. - Poll block.c for tracking of dirty blocks instead of manage it here. Signed-off-by: Liran Schour <lirans@il.ibm.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
130 lines
3.1 KiB
C
130 lines
3.1 KiB
C
/*
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* QEMU live migration
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*
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* Copyright IBM, Corp. 2008
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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#ifndef QEMU_MIGRATION_H
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#define QEMU_MIGRATION_H
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#include "qdict.h"
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#include "qemu-common.h"
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#define MIG_STATE_ERROR -1
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#define MIG_STATE_COMPLETED 0
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#define MIG_STATE_CANCELLED 1
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#define MIG_STATE_ACTIVE 2
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typedef struct MigrationState MigrationState;
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struct MigrationState
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{
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/* FIXME: add more accessors to print migration info */
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void (*cancel)(MigrationState *s);
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int (*get_status)(MigrationState *s);
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void (*release)(MigrationState *s);
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int blk;
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int shared;
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};
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typedef struct FdMigrationState FdMigrationState;
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struct FdMigrationState
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{
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MigrationState mig_state;
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int64_t bandwidth_limit;
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QEMUFile *file;
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int fd;
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Monitor *mon_resume;
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int state;
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int (*get_error)(struct FdMigrationState*);
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int (*close)(struct FdMigrationState*);
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int (*write)(struct FdMigrationState*, const void *, size_t);
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void *opaque;
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};
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void qemu_start_incoming_migration(const char *uri);
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void do_migrate(Monitor *mon, const QDict *qdict, QObject **ret_data);
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void do_migrate_cancel(Monitor *mon, const QDict *qdict, QObject **ret_data);
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void do_migrate_set_speed(Monitor *mon, const QDict *qdict, QObject **ret_data);
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uint64_t migrate_max_downtime(void);
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void do_migrate_set_downtime(Monitor *mon, const QDict *qdict);
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void do_info_migrate(Monitor *mon);
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int exec_start_incoming_migration(const char *host_port);
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MigrationState *exec_start_outgoing_migration(const char *host_port,
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int64_t bandwidth_limit,
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int detach,
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int blk,
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int inc);
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int tcp_start_incoming_migration(const char *host_port);
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MigrationState *tcp_start_outgoing_migration(const char *host_port,
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int64_t bandwidth_limit,
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int detach,
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int blk,
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int inc);
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int unix_start_incoming_migration(const char *path);
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MigrationState *unix_start_outgoing_migration(const char *path,
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int64_t bandwidth_limit,
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int detach,
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int blk,
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int inc);
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int fd_start_incoming_migration(const char *path);
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MigrationState *fd_start_outgoing_migration(Monitor *mon,
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const char *fdname,
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int64_t bandwidth_limit,
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int detach,
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int blk,
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int inc);
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void migrate_fd_monitor_suspend(FdMigrationState *s);
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void migrate_fd_error(FdMigrationState *s);
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void migrate_fd_cleanup(FdMigrationState *s);
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void migrate_fd_put_notify(void *opaque);
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ssize_t migrate_fd_put_buffer(void *opaque, const void *data, size_t size);
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void migrate_fd_connect(FdMigrationState *s);
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void migrate_fd_put_ready(void *opaque);
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int migrate_fd_get_status(MigrationState *mig_state);
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void migrate_fd_cancel(MigrationState *mig_state);
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void migrate_fd_release(MigrationState *mig_state);
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void migrate_fd_wait_for_unfreeze(void *opaque);
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int migrate_fd_close(void *opaque);
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static inline FdMigrationState *migrate_to_fms(MigrationState *mig_state)
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{
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return container_of(mig_state, FdMigrationState, mig_state);
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}
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#endif
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