block: move trace probes into bdrv_co_preadv|pwritev
There are trace probes in bdrv_co_readv|writev, however, the block drivers are being gradually moved over to using the bdrv_co_preadv|pwritev functions instead. As a result some block drivers miss the current probes. Move the probes into bdrv_co_preadv|pwritev instead, so that they are triggered by more (all?) I/O code paths. Signed-off-by: NDaniel P. Berrange <berrange@redhat.com> Message-id: 20170804105036.11879-1-berrange@redhat.com Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
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