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This lets different subsystems register an Error that is thrown whenever migration is attempted. This works nicely because it gracefully supports things like hotplug. Right now, if multiple errors are registered, only one of them is reported. I expect that for 1.1, we'll extend query-migrate to return all of the reasons why migration is disabled at any given point in time. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
108 lines
2.8 KiB
C
108 lines
2.8 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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#include "notify.h"
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#include "error.h"
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typedef struct MigrationState MigrationState;
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struct MigrationState
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{
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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;
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int state;
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int (*get_error)(MigrationState *s);
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int (*close)(MigrationState *s);
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int (*write)(MigrationState *s, const void *buff, size_t size);
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void *opaque;
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int blk;
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int shared;
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};
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void process_incoming_migration(QEMUFile *f);
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int qemu_start_incoming_migration(const char *uri);
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int do_migrate(Monitor *mon, const QDict *qdict, QObject **ret_data);
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int do_migrate_cancel(Monitor *mon, const QDict *qdict, QObject **ret_data);
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int 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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int do_migrate_set_downtime(Monitor *mon, const QDict *qdict,
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QObject **ret_data);
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void do_info_migrate_print(Monitor *mon, const QObject *data);
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void do_info_migrate(Monitor *mon, QObject **ret_data);
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int exec_start_incoming_migration(const char *host_port);
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int exec_start_outgoing_migration(MigrationState *s, const char *host_port);
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int tcp_start_incoming_migration(const char *host_port);
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int tcp_start_outgoing_migration(MigrationState *s, const char *host_port);
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int unix_start_incoming_migration(const char *path);
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int unix_start_outgoing_migration(MigrationState *s, const char *path);
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int fd_start_incoming_migration(const char *path);
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int fd_start_outgoing_migration(MigrationState *s, const char *fdname);
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void migrate_fd_error(MigrationState *s);
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void migrate_fd_connect(MigrationState *s);
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void add_migration_state_change_notifier(Notifier *notify);
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void remove_migration_state_change_notifier(Notifier *notify);
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bool migration_is_active(MigrationState *);
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bool migration_has_finished(MigrationState *);
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bool migration_has_failed(MigrationState *);
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uint64_t ram_bytes_remaining(void);
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uint64_t ram_bytes_transferred(void);
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uint64_t ram_bytes_total(void);
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int ram_save_live(Monitor *mon, QEMUFile *f, int stage, void *opaque);
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int ram_load(QEMUFile *f, void *opaque, int version_id);
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extern int incoming_expected;
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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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void migrate_add_blocker(Error *reason);
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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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* @reason - the error blocking migration
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*/
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void migrate_del_blocker(Error *reason);
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#endif
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