On Tue, Aug 11, 2020 at 12:13:47PM +0200, Pavel Hrdina wrote: > BPF syscall BPF_MAP_GET_NEXT_KEY returns -1 if something fails but it > will also return -1 if trying to get next key using the last key in the > map with errno set to ENOENT. > > If there are VMs running and libvirtd is restarted and user tries to > call some cgroup devices operation on a VM we need to get the count of > entries in BPF map and it fails which will result in error when trying > to attach/detech devices. > > Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1833321 > > Signed-off-by: Pavel Hrdina <phrdina@xxxxxxxxxx> > --- Reviewed-by: Erik Skultety <eskultet@xxxxxxxxxx>
