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Description of problem: V2V fails to convert VM with >=4 virtio devices. #virsh dumpxml kvm-rhel6.1-i386-4vdXX ... <devices> <emulator>/usr/libexec/qemu-kvm</emulator> <disk type='file' device='disk'> <source file='/mnt/sdb/image/kvm-rhel6.1-i386-4vdXX'/> <target dev='vda' bus='virtio'/> </disk> <disk type='file' device='disk'> <source file='/mnt/sdb/image/kvm-rhel6.1-i386-4vdXX-disk2.img'/> <target dev='vdb' bus='virtio'/> </disk> <disk type='file' device='disk'> <source file='/mnt/sdb/image/kvm-rhel6.1-i386-4vdXX-disk4.img'/> <target dev='vdc' bus='virtio'/> </disk> <disk type='file' device='disk'> <source file='/mnt/sdb/image/kvm-rhel6.1-i386-4vdXX-disk3.img'/> <target dev='vdd' bus='virtio'/> </disk> ... Version-Release number of selected component (if applicable): virt-v2v-0.7.1-4.el6.x86_64 libguestfs-1.7.17-15.el6.x86_64 libvirt-0.8.7-6.el6.x86_64 qemu-kvm-0.12.1.2-2.135.el6.x86_64 How reproducible: always Steps to Reproduce: 1. Convert the VM with 4 virtio devices # LIBGUESTFS_DEBUG=1 virt-v2v -ic qemu+ssh://10.66.72.122/system -o rhev -op 10.66.90.115:/vol/v2vrwu1/rwu_export kvm-rhel6.1-i386-4vdXX kvm-rhel6.1-i386-4vdXX: 100% [=========================================================================]D 0h02m12s kvm-rhel6.1-i386-4vdXX-disk2.img: 100% [===============================================================]D 0h01m07s kvm-rhel6.1-i386-4vdXX-disk4.img: 100% [===============================================================]D 0h01m08s kvm-rhel6.1-i386-4vdXX-disk3.img: 100% [===============================================================]D 0h01m07s new guestfs handle 0x2dc94b0 [00000ms] febootstrap-supermin-helper --verbose -u 36 -g 36 -f checksum '/usr/lib64/guestfs/supermin.d' x86_64 supermin helper [00000ms] whitelist = (not specified), host_cpu = x86_64, kernel = (null), initrd = (null), appliance = (null) supermin helper [00000ms] inputs[0] = /usr/lib64/guestfs/supermin.d checking modpath /lib/modules/2.6.32-71.el6.x86_64 is a directory picked vmlinuz-2.6.32-71.el6.x86_64 because modpath /lib/modules/2.6.32-71.el6.x86_64 exists supermin helper [00000ms] finished creating kernel supermin helper [00000ms] visiting /usr/lib64/guestfs/supermin.d supermin helper [00000ms] visiting /usr/lib64/guestfs/supermin.d/base.img supermin helper [00000ms] visiting /usr/lib64/guestfs/supermin.d/daemon.img supermin helper [00000ms] visiting /usr/lib64/guestfs/supermin.d/hostfiles supermin helper [00011ms] visiting /usr/lib64/guestfs/supermin.d/ntfs.hostfiles supermin helper [00011ms] visiting /usr/lib64/guestfs/supermin.d/ntfs.img supermin helper [00075ms] finished creating appliance [00080ms] begin testing qemu features [00098ms] finished testing qemu features [00100ms] /usr/libexec/qemu-kvm \ -drive file=/tmp/mjUop0LTIi/ee84623f-0ded-4144-adf2-69bed2e69732/v2v.0fCZ8L97/14f5b67a-8180-48a0-91e9-6185cacf6a1f/ccbc949d-71b9-4d3d-84cc-5b8ff098e3c4,cache=off,if=ide \ -drive file=/tmp/mjUop0LTIi/ee84623f-0ded-4144-adf2-69bed2e69732/v2v.0fCZ8L97/f582e314-13fb-40eb-b25d-f412b97b0f03/fda0020b-8df1-4810-9486-23bf9aea5926,cache=off,if=ide \ -drive file=/tmp/mjUop0LTIi/ee84623f-0ded-4144-adf2-69bed2e69732/v2v.0fCZ8L97/c21ca91d-27ab-4b80-aaff-b369765ae8f2/37988862-0842-43e6-a90e-3f3a52565888,cache=off,if=ide \ -drive file=/tmp/mjUop0LTIi/ee84623f-0ded-4144-adf2-69bed2e69732/v2v.0fCZ8L97/d66950cf-b83a-4d1b-9f1e-484994b8dc7d/47de6f46-1276-4c84-9e55-d4b55b0b8f53,cache=off,if=ide \ -drive file=/var/lib/virt-v2v/transfer.iso,snapshot=on,if=ide \ -nodefconfig \ -enable-kvm \ -nodefaults \ -nographic \ -m 500 \ -no-reboot \ -device virtio-serial \ -serial stdio \ -chardev socket,path=/tmp/libguestfsGpprEU/sock,id=channel0 \ -device virtserialport,chardev=channel0,name=org.libguestfs.channel.0 \ -netdev user,id=usernet,net=169.254.0.0/16 \ -device virtio-net-pci,netdev=usernet \ -kernel /tmp/.guestfs-36/kernel.19020 \ -initrd /tmp/.guestfs-36/initrd.19020 \ -append 'panic=1 console=ttyS0 udevtimeout=300 noapic acpi=off printk.time=1 cgroup_disable=memory selinux=0 guestfs_verbose=1 TERM=xterm ' \ -drive file=/tmp/.guestfs-36/root.19020,snapshot=on,if=virtio,cache=unsafe accept_from_daemon: 0x2dc94b0 g->state = 1 recv_from_daemon: 0x2dc94b0 g->state = 1, size_rtn = 0x7fff0a6f297c, buf_rtn = 0x7fff0a6f2940 qemu: too many IDE bus child_cleanup: 0x2dc94b0: child process died unexpected end of file when reading from daemon at /usr/share/perl5/vendor_perl/Sys/VirtV2V/GuestfsHandle.pm line 86. closing guestfs handle 0x2dc94b0 (state 0) Actual results: Fail to convert VM with >=4 virtio devices Expected results: Convert successfully. Additional info: I guess the reason is there is no conditional statement to get the interface instead of a fix "ide" in GuestfsHandle.pm: #cat /usr/share/perl5/vendor_perl/Sys/VirtV2V/GuestfsHandle.pm ... sub new { my $class = shift; my ($storage, $transfer, $isrhev) = @_; my $self = {}; # Open a guest handle my $g; my $open = sub { my $interface = "ide"; $g = open_guest($storage, rw => 1, interface => $interface); # Add the transfer iso if there is one $g->add_drive_ro_with_if($transfer, $interface) if (defined($transfer)); # Enable networking in the guest $g->set_network(1); $g->launch(); };