Alexei Starovoitov 91bc4822c3 tc: bpf: add checksum helpers ... Commit 608cd71a9c ("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>		2015-04-06 16:42:35 -04:00
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Makefile	tc: bpf: add checksum helpers	2015-04-06 16:42:35 -04:00
bpf_helpers.h	tc: bpf: add checksum helpers	2015-04-06 16:42:35 -04:00
bpf_load.c	samples: bpf: elf_bpf file loader	2014-12-05 21:47:33 -08:00
bpf_load.h	samples: bpf: elf_bpf file loader	2014-12-05 21:47:33 -08:00
libbpf.c	samples: bpf: example of stateful socket filtering	2014-12-05 21:47:32 -08:00
libbpf.h	ebpf: export BPF_PSEUDO_MAP_FD to uapi	2015-03-01 14:05:19 -05:00
sock_example.c	samples: bpf: example of stateful socket filtering	2014-12-05 21:47:32 -08:00
sockex1_kern.c	samples: bpf: add skb->field examples and tests	2015-03-15 22:02:28 -04:00
sockex1_user.c	samples: bpf: add skb->field examples and tests	2015-03-15 22:02:28 -04:00
sockex2_kern.c	samples: bpf: add skb->field examples and tests	2015-03-15 22:02:28 -04:00
sockex2_user.c	samples: bpf: add skb->field examples and tests	2015-03-15 22:02:28 -04:00
tcbpf1_kern.c	tc: bpf: add checksum helpers	2015-04-06 16:42:35 -04:00
test_maps.c	samples: bpf: relax test_maps check	2015-01-26 17:20:40 -08:00
test_verifier.c	bpf: allow BPF programs access 'protocol' and 'vlan_tci' fields	2015-03-17 15:06:31 -04:00