On 2020-07-22 09:44, Michal Privoznik wrote:
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.
Oh, Turned out to be lack of dm_lib_release().
Confirmed, It did fix the issue.
Thanks a lot,
Lin
