block: acquire AioContext in qmp_query_blockstats()
Make query-blockstats safe for dataplane by acquiring the BlockDriverState's AioContext. This ensures that the dataplane IOThread and the main loop's monitor code do not race. Note the assumption that acquiring the drive's BDS AioContext also protects ->file and ->backing_hd. This assumption is made by other aio_context_acquire() callers too. Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com> Signed-off-by: NFam Zheng <famz@redhat.com> Tested-by: NPaolo Bonzini <pbonzini@redhat.com> Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Showing
想要评论请 注册 或 登录