migration: split migration hooks out of QEMUFileOps
The QEMUFileOps struct contains the I/O subsystem callbacks and the migration stage hooks. Split the hooks out into a separate QEMUFileHooks struct to make it easier to refactor the I/O side of QEMUFile without affecting the hooks. Reviewed-by: NDr. David Alan Gilbert <dgilbert@redhat.com> Signed-off-by: NDaniel P. Berrange <berrange@redhat.com> Reviewed-by: NJuan Quintela <quintela@redhat.com> Message-Id: <1461751518-12128-6-git-send-email-berrange@redhat.com> Signed-off-by: NAmit Shah <amit.shah@redhat.com>
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