Re: The issue about adding multipath device's targets into qemu-pr-helper's namespace

On 7/20/20 4:36 PM, Lin Ma wrote: > On 2020-07-17 07:05, Michal Prívozník wrote: >> errno=9 is EBADF so maybe this is a dm issue after all? > Emm...So far I lean towards to an issue in libvirt code, rather than > in dm. You might be right after all. Turns out that the mass FD closing we do before spawning QEMU closed /dev/mapper/control opened by earlier runs of virDevMapperGetTargets() and thus the pre-exec hook which called the function again was passing closed FD into ioctl(). I've posted patches: https://www.redhat.com/archives/libvir-list/2020-July/msg01500.html The first patch should be enough to fix the issue. Can you check please? It fixed the issue in my limited testing.