Hi On Sun, May 21, 2023 at 4:27 PM Zhouyi Zhou <zhouzhouyi@xxxxxxxxx> wrote: > > Hi > > On Sat, May 20, 2023 at 7:37 AM Zhouyi Zhou <zhouzhouyi@xxxxxxxxx> wrote: > > > > Thank you for responding so quickly ;-) > > > > 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 > > OK > > [214398] STRUCT 'bpf_struct_ops_tcp_congestion_ops' size=256 vlen=3 > > 'refcnt' type_id=298 bits_offset=0 > > 'state' type_id=214224 bits_offset=32 > > 'data' type_id=213704 bits_offset=512 > > > > Please tell me if I could provide any further information. > > > > You are of great help > > > > Thank you very much > > Zhouyi > Thanks for your help > > Or, can you teach me how to prepare an environment that can run > "bpftool struct_ops register xxx.o" ;-) > (A few words of description of OS version (Ubuntu/CentOS/Suse for etc) > and example kernel .config is enough) I invoke following commands, and it works: cd tools/testing/selftests/bpf find . -name vmlinux.h|xargs rm make -j 20 put bpf_cubic.bpf.o to my virtual machine, and it works! I don't know why Thank you all! Best Regards Zhouyi > > I am an enthusiastic learner ;-) > > Thanks in advance > Zhouyi > > >
