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qapi: Convert migrate

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The migrate command is one of those commands where HMP and QMP completely
mix up together. This made the conversion to the QAPI (which separates the
command into QMP and HMP parts) a bit difficult.

The first important change to be noticed is that this commit completes the
removal of the Monitor object from migration code, started by the previous
commit.

Another important and tricky change is about supporting the non-detached
mode. That is, if the user doesn't pass '-d' the migrate command will lock
the monitor and will only release it when migration is finished.

To support this in the new HMP command (hmp_migrate()), it is necessary
to create a timer which runs every second and checks if the migration is
still active. If it is, the timer callback will re-schedule itself to run
one second in the future. If the migration has already finished, the
monitor lock is released and the user can use it normally.

All these changes should be transparent to the user.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This commit is contained in:
Luiz Capitulino 2011-12-05 14:48:01 -02:00
parent 539de1246d
commit e1c37d0e94
10 changed files with 123 additions and 71 deletions
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3
migration.h
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@ -26,7 +26,6 @@ struct MigrationState
int64_t bandwidth_limit;
QEMUFile *file;
int fd;
Monitor *mon;
int state;
int (*get_error)(MigrationState *s);
int (*close)(MigrationState *s);
@ -40,8 +39,6 @@ void process_incoming_migration(QEMUFile *f);
int qemu_start_incoming_migration(const char *uri);
int do_migrate(Monitor *mon, const QDict *qdict, QObject **ret_data);
uint64_t migrate_max_downtime(void);
void do_info_migrate_print(Monitor *mon, const QObject *data);