Hi On Sat, May 20, 2023 at 3:01 AM Martin KaFai Lau <martin.lau@xxxxxxxxx> wrote: > > On 5/19/23 5:07 AM, Zhouyi Zhou wrote: > > Dear developers: > > I compiled bpftool and bpf tests in mainline (2d1bcbc6cd70), > > but when I invoke: > > bpftool struct_ops register bpf_cubic.bpf.o > > > > the command line fail with: > > libbpf: struct_ops init_kern: struct tcp_congestion_ops data is not > > found in struct bpf_struct_ops_tcp_congestion_ops > > At the machine trying to register the bpf_cubic, please dump the vmlinux btf and > search for bpf_struct_ops_tcp_congestion_ops and paste it here: > > For example: > #> bpftool btf dump file /sys/kernel/btf/vmlinux > > ... > > [74578] STRUCT 'bpf_struct_ops_tcp_congestion_ops' size=256 vlen=3 > 'refcnt' type_id=145 bits_offset=0 > 'state' type_id=74569 bits_offset=32 > 'data' type_id=6241 bits_offset=512 > Exciting news: when I construct the kernel package, I found lots of following warnings: WARN: multiple IDs found for 'task_struct': 241, 21719 - using 241 WARN: multiple IDs found for 'vm_area_struct': 360, 21750 - using 360 WARN: multiple IDs found for 'file': 805, 21789 - using 805 WARN: multiple IDs found for 'cgroup': 666, 21819 - using 666 WARN: multiple IDs found for 'inode': 928, 21936 - using 928 WARN: multiple IDs found for 'path': 960, 21965 - using 960 These warnings lead me to: Link: https://lore.kernel.org/lkml/ZBovCrMXJk7NPISp@xxxxxxxxxxx/T/ So, I upgraded my pahole from [1], and construct the kernel package again, now I can successfully invoke bpftool struct_ops register bpf_cubic.bpf.o [1] https://github.com/acmel/dwarves.git Sorry for the previous noise and Thanks again Best Regards Zhouyi
