]> git.karo-electronics.de Git - linux-beck.git/commit
bpf: fix samples to add fake KBUILD_MODNAME
authorDaniel Borkmann <daniel@iogearbox.net>
Tue, 25 Oct 2016 22:37:53 +0000 (00:37 +0200)
committerDavid S. Miller <davem@davemloft.net>
Sat, 29 Oct 2016 18:46:12 +0000 (14:46 -0400)
commit96a8eb1eeed2c3485cdba198fab3a2faaec386d3
tree2ca8e31b6d4d038de726eba1ed43ca26c2fad4b8
parente4cabca54911a6be6f2e80e48fa497c7e19019a5
bpf: fix samples to add fake KBUILD_MODNAME

Some of the sample files are causing issues when they are loaded with tc
and cls_bpf, meaning tc bails out while trying to parse the resulting ELF
file as program/map/etc sections are not present, which can be easily
spotted with readelf(1).

Currently, BPF samples are including some of the kernel headers and mid
term we should change them to refrain from this, really. When dynamic
debugging is enabled, we bail out due to undeclared KBUILD_MODNAME, which
is easily overlooked in the build as clang spills this along with other
noisy warnings from various header includes, and llc still generates an
ELF file with mentioned characteristics. For just playing around with BPF
examples, this can be a bit of a hurdle to take.

Just add a fake KBUILD_MODNAME as a band-aid to fix the issue, same is
done in xdp*_kern samples already.

Fixes: 65d472fb007d ("samples/bpf: add 'pointer to packet' tests")
Fixes: 6afb1e28b859 ("samples/bpf: Add tunnel set/get tests.")
Fixes: a3f74617340b ("cgroup: bpf: Add an example to do cgroup checking in BPF")
Reported-by: Chandrasekar Kannan <ckannan@console.to>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
samples/bpf/parse_ldabs.c
samples/bpf/parse_simple.c
samples/bpf/parse_varlen.c
samples/bpf/tcbpf1_kern.c
samples/bpf/tcbpf2_kern.c
samples/bpf/test_cgrp2_tc_kern.c