https://github.com/kubevirt/containerized-data-importer/issues/1520
Hi Eric, We had a question from the Kubevirt team related to the above issue. The question is roughly if it's possible to calculate the checksum of an image as an nbdkit filter and/or in the qemu block layer. Supplemental #1: could qemu-img convert calculate a checksum as it goes along? Supplemental #2: could we detect various sorts of common errors, such a webserver that is incorrectly configured and serves up an error page containing "<html>"; or something which is supposed to be a disk image but does not "look like" (in some ill-defined sense) a disk image, eg. it has no partition table. I'm not sure if qemu has any existing features covering the above (and I know for sure that nbdkit doesn't). One issue is that calculating a checksum involves a linear scan of the image, although we can at least skip holes. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com nbdkit - Flexible, fast NBD server with plugins https://gitlab.com/nbdkit/nbdkit _______________________________________________ Libguestfs mailing list Libguestfs@redhat.com https://listman.redhat.com/mailman/listinfo/libguestfs
