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add qemu-img convert -n option (skip target volume creation)

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Add a -n option to skip volume creation on qemu-img convert.
This is useful for targets such as rbd / ceph, where the
target volume may already exist; we cannot always rely on
qemu-img convert to create the image, as dependent on the
output format, there may be parameters which are not possible
to specify through the qemu-img convert command line.

Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
Signed-off-by: Alex Bligh <alex@alex.org.uk>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Alexandre Derumier 2013-09-02 19:07:24 +01:00 • committed by Stefan Hajnoczi
parent b3f3a30f38
commit b2e10493c7
6 changed files with 162 additions and 18 deletions
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10
tests/qemu-iotests/063.out Normal file
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QA output created by 063
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=4194304
== Testing conversion with -n fails with no target file ==
== Testing conversion with -n succeeds with a target file ==
== Testing conversion to raw is the same after conversion with -n ==
== Testing conversion back to original format ==
No errors were found on the image.
== Testing conversion to a smaller file fails ==
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=2097152
*** done