2024-06-07 12:17 UTC+0100 ~ Kenta Tada <tadakentaso@xxxxxxxxx> > When CONFIG_NETKIT=y, > bpftool-cgroup shows error even if the cgroup's path is correct: > > $ bpftool cgroup tree /sys/fs/cgroup > CgroupPath > ID AttachType AttachFlags Name > Error: can't query bpf programs attached to /sys/fs/cgroup: No such device or address > > From strace and kernel tracing, I found netkit returned ENXIO and this command failed. > I think this AttachType(BPF_NETKIT_PRIMARY) is not relevant to cgroup. > > bpftool-cgroup should query just only cgroup-related attach types. > > v2->v3: > - removed an unnecessary check > > v1->v2: > - used an array of cgroup attach types > > Signed-off-by: Kenta Tada <tadakentaso@xxxxxxxxx> Reviewed-by: Quentin Monnet <qmo@xxxxxxxxxx> Thanks!
