block: Create the commit block job before reopening any image
If the base or overlay images need to be reopened in read-write mode but the block_job_create() call fails then no one will put those images back in read-only mode. We can solve this problem easily by calling block_job_create() first. Signed-off-by: NAlberto Garcia <berto@igalia.com> Message-id: aa495045770a6f1a7cc5d408397a17c75097fdd8.1464346103.git.berto@igalia.com Reviewed-by: NMax Reitz <mreitz@redhat.com> Signed-off-by: NMax Reitz <mreitz@redhat.com>
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