Add a helper function to get socket cookie in eBPF
authorChenbo Feng <fengc@google.com>
Thu, 23 Mar 2017 00:27:34 +0000 (17:27 -0700)
committerDavid S. Miller <davem@davemloft.net>
Fri, 24 Mar 2017 00:01:02 +0000 (17:01 -0700)
commit91b8270f2a4d1d9b268de90451cdca63a70052d6
treecca836d388f189d98179ab3dc51d1afbffa0a6e9
parent16ae1f223601c44e5cb65c99257ffae003504704
Add a helper function to get socket cookie in eBPF

Retrieve the socket cookie generated by sock_gen_cookie() from a sk_buff
with a known socket. Generates a new cookie if one was not yet set.If
the socket pointer inside sk_buff is NULL, 0 is returned. The helper
function coud be useful in monitoring per socket networking traffic
statistics and provide a unique socket identifier per namespace.

Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Chenbo Feng <fengc@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/linux/sock_diag.h
include/uapi/linux/bpf.h
net/core/filter.c
net/core/sock_diag.c
tools/include/uapi/linux/bpf.h