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authorAlexei Starovoitov <ast@plumgrid.com>2015-04-02 03:12:13 +0300
committerDavid S. Miller <davem@davemloft.net>2015-04-06 23:42:35 +0300
commit91bc4822c3d61b9bb7ef66d3b77948a4f9177954 (patch)
treeca92a811b501957c1e876290d305aaf81c8d9aff /samples/bpf/Makefile
parent5888b93b750609680735d6b8b737703083ef40ff (diff)
downloadlinux-91bc4822c3d61b9bb7ef66d3b77948a4f9177954.tar.xz
tc: bpf: add checksum helpers
Commit 608cd71a9c7c ("tc: bpf: generalize pedit action") has added the possibility to mangle packet data to BPF programs in the tc pipeline. This patch adds two helpers bpf_l3_csum_replace() and bpf_l4_csum_replace() for fixing up the protocol checksums after the packet mangling. It also adds 'flags' argument to bpf_skb_store_bytes() helper to avoid unnecessary checksum recomputations when BPF programs adjusting l3/l4 checksums and documents all three helpers in uapi header. Moreover, a sample program is added to show how BPF programs can make use of the mangle and csum helpers. Signed-off-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'samples/bpf/Makefile')
-rw-r--r--samples/bpf/Makefile1
1 files changed, 1 insertions, 0 deletions
diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index b5b3600dcdf5..d24f51bca465 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -17,6 +17,7 @@ sockex2-objs := bpf_load.o libbpf.o sockex2_user.o
always := $(hostprogs-y)
always += sockex1_kern.o
always += sockex2_kern.o
+always += tcbpf1_kern.o
HOSTCFLAGS += -I$(objtree)/usr/include