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| author |   Jesper Dangaard Brouer <brouer@redhat.com> | 2019-08-08 18:17:47 +0200 |
|---|---|---|
| committer |   Daniel Borkmann <daniel@iogearbox.net> | 2019-08-09 18:05:03 +0200 |
| commit | abcce733adb71013997fcb84142a5454ef133616 (patch) | |
| tree | 28659aea47a6a2c3135b3f97a4ecb3dae929f2d1 /tools/perf/scripts/python/stackcollapse.py | |
| parent | samples/bpf: make xdp_fwd more practically usable via devmap lookup (diff) | |
| download | linux-dev-abcce733adb71013997fcb84142a5454ef133616.tar.xz linux-dev-abcce733adb71013997fcb84142a5454ef133616.zip | |
samples/bpf: xdp_fwd explain bpf_fib_lookup return codes
Make it clear that this XDP program depend on the network
stack to do the ARP resolution. This is connected with the
BPF_FIB_LKUP_RET_NO_NEIGH return code from bpf_fib_lookup().
Another common mistake (seen via XDP-tutorial) is that users
don't realize that sysctl net.ipv{4,6}.conf.all.forwarding
setting is honored by bpf_fib_lookup.
Reported-by: Anton Protopopov <a.s.protopopov@gmail.com>
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Acked-by: Yonghong Song <yhs@fb.com>
Reviewed-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions