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| author |   Alexei Starovoitov <ast@plumgrid.com> | 2015-04-01 17:12:13 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2015-04-06 16:42:35 -0400 |
| commit | 91bc4822c3d61b9bb7ef66d3b77948a4f9177954 (patch) | |
| tree | ca92a811b501957c1e876290d305aaf81c8d9aff /fs/drop_caches.c | |
| parent | Merge branch 'nf-hook-compress' (diff) | |
| download | linux-dev-91bc4822c3d61b9bb7ef66d3b77948a4f9177954.tar.xz linux-dev-91bc4822c3d61b9bb7ef66d3b77948a4f9177954.zip | |
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 'fs/drop_caches.c')
0 files changed, 0 insertions, 0 deletions