Comment 3 for bug 1295239

Reviewed: https://review.openstack.org/85031
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=cf18199571b7965a8fe77db3d910b0e798f12946
Submitter: Jenkins
Branch: master

commit cf18199571b7965a8fe77db3d910b0e798f12946
Author: Vipin Balachandran <email address hidden>
Date: Thu Apr 3 11:42:55 2014 +0530

    vmware: Force chunked transfer for upload-to-image

    The upload-to-image operation downloads (using stream-optimized HTTP NFC
    transfer) the virtual disk corresponding to the volume to a pipe from
    where the glance image client reads the data for upload. Due to a recent
    change in the glance image client, success in seeking the input file
    object results in forgoing the chunked transfer in favor of regular
    transfer. The glance image client expects an IOError if the input file
    object is a pipe. Currently the pipe seek() is a NOP and this results in
    upload-to-image failure. This changes fixes such failures by throwing
    an IOError indicating an illegal seek.

    Change-Id: I2e69fc4103559d49d2cee16ea04787a252dbf879
    Closes-Bug: #1295239