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Brito" To: "xdp-newbies@vger.kernel.org" Subject: xdp_iphash_to_cpu_cmdline: Error loading BTF: Invalid argument(22) Message-ID: <20210622172216.79c6b3f2@babalu> Organization: InterNexo Ltda. X-Mailer: Claws Mail 3.16.0 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: xdp-newbies@vger.kernel.org Hi Runing "# ./xdp_iphash_to_cpu --dev eth1 --all-cpus --wan" returns 2 loading errors: ----------------------8<---------------------------------- libbpf: Error loading BTF: Invalid argument(22) libbpf: magic: 0xeb9f version: 1 flags: 0x0 hdr_len: 24 type_off: 0 type_len: 492 str_off: 492 str_len: 1724 btf_total_size: 2240 [1] PTR (anon) type_id=2 [2] STRUCT xdp_md size=20 vlen=5 data type_id=3 bits_offset=0 data_end type_id=3 bits_offset=32 data_meta type_id=3 bits_offset=64 ingress_ifindex type_id=3 bits_offset=96 rx_queue_index type_id=3 bits_offset=128 [3] TYPEDEF __u32 type_id=4 [4] INT unsigned int size=4 bits_offset=0 nr_bits=32 encoding=(none) [5] FUNC_PROTO (anon) return=6 args=(1 ctx) [6] INT int size=4 bits_offset=0 nr_bits=32 encoding=SIGNED [7] FUNC xdp_program type_id=5 vlen != 0 libbpf: Error loading ELF section .BTF: -22. Ignored and continue. TC workaround for mapname: map_ifindex_type map_fd:5 Added CPU:0 queue_size:192 Added CPU:1 queue_size:192 Added CPU:2 queue_size:192 Added CPU:3 queue_size:192 Added CPU:4 queue_size:192 Added CPU:5 queue_size:192 Added CPU:6 queue_size:192 Added CPU:7 queue_size:192 Added CPU:8 queue_size:192 Added CPU:9 queue_size:192 Added CPU:10 queue_size:192 Added CPU:11 queue_size:192 Added CPU:12 queue_size:192 Added CPU:13 queue_size:192 Added CPU:14 queue_size:192 Added CPU:15 queue_size:192 Documentation: XDP: Lookup IPv4 and redirect to CPU hash This program loads the XDP eBPF program into the kernel. Use the cmdline tool for add/removing dest IPs to the hash - Attached to device:eth1 (ifindex:4) prog_id:73 ----------------------------------8<------------------------------- Since the XDP program was correctly listed by "bpftool net", I continued an added just ONE ip # ./xdp_iphash_to_cpu_cmdline --add --ip 1.2.3.4 --classid 1:1234 --cpu 1 key: 0x4030201 WARN: Looks like map_txq_config --base-setup is missing WARN: Fixing, doing map_txq_config --base-setup iphash_modify() IP:1.2.3.4 key:0x4030201 TC-handle:0x11234 listed the map # ./xdp_iphash_to_cpu_cmdline --list { "1.2.3.4" : { "cpu" : 1, "tc_maj" : "1" , "tc_min" : "1234" }} And right after I tried to remove the program from XDP: # ./xdp_iphash_to_cpu --dev eth1 --remove Removing XDP program on ifindex:4 device:eth1 ERR: Clear ifindex type failed INFO: not cleanup pinned map file:/sys/fs/bpf/tc/globals/map_ip_hash (use 'rm') All seems to be rigth despite the errors. Are all these errors and warnings serious problems? Should I worry? Hints?? Regards Ethy