Den fre 10 aug. 2018 kl 15:23 skrev Konrad Djimeli <kdjim...@igalia.com>: > > On 2018-08-10 11:58, Konrad Djimeli wrote: > > On 2018-08-10 03:51, Jakub Kicinski wrote: > >> On Thu, 09 Aug 2018 18:18:08 +0200, kdjimeli wrote: > >>> Hello, > >>> > >>> I have been trying to test a sample AF_XDP program, but I have been > >>> experiencing some issues. > >>> After building the sample code > >>> https://github.com/torvalds/linux/tree/master/samples/bpf, > >>> when running the xdpsock binary, I get the errors > >>> "libbpf: failed to create map (name: 'xsks_map'): Invalid argument" > >>> "libbpf: failed to load object './xdpsock_kern.o" > >>> > >>> I tried to figure out the cause of the error but all I know is that it > >>> occurs at line 910 with the function > >>> call "bpf_prog_load_xattr(&prog_load_attr, &obj, &prog_fd)". > >>> > >>> Please I would like to inquire what could be a possible for this error. > >> > >> which kernel version are you running? > > > > My kernel version is 4.18.0-rc8+. I cloned it from > > https://github.com/torvalds/linux before building a running. > > > > My commit head(git show-ref --head) is at > > 1236568ee3cbb0d3ac62d0074a29b97ecf34cbbc HEAD > > 1236568ee3cbb0d3ac62d0074a29b97ecf34cbbc refs/heads/master > > 1236568ee3cbb0d3ac62d0074a29b97ecf34cbbc refs/remotes/origin/HEAD > > 1236568ee3cbb0d3ac62d0074a29b97ecf34cbbc refs/remotes/origin/master > > ... > > > > > > I also applied the patch https://patchwork.ozlabs.org/patch/949884/ > > (samples: bpf: convert xdpsock_user.c to libbpf ), as the error was > > initially in the form show below: > > "failed to create a map: 22 Invalid argument" > > "ERROR: load_bpf_file" > > > > Thanks > > Konrad > > Also other sample applications that make use of other bpf maps, such as > BPF_MAP_TYPE_CPUMAP in xdp_redirect_cpu work fine. But the application > with BPF_MAP_TYPE_XSKMAP fails producing the error mentioned above. > > Thanks > Konrad
Thanks for taking AF_XDP for a spin! Before I start digging into details; Do you have CONFIG_XDP_SOCKETS=y in your config? :-) Björn
