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authorChenbo Feng <fengc@google.com>2017-03-22 17:27:34 -0700
committerDavid S. Miller <davem@davemloft.net>2017-03-23 17:01:02 -0700
commit91b8270f2a4d1d9b268de90451cdca63a70052d6 (patch)
treecca836d388f189d98179ab3dc51d1afbffa0a6e9 /tools/include
parent16ae1f223601c44e5cb65c99257ffae003504704 (diff)
downloadlinux-91b8270f2a4d1d9b268de90451cdca63a70052d6.tar.bz2
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>
Diffstat (limited to 'tools/include')
-rw-r--r--tools/include/uapi/linux/bpf.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index ce6f029ac368..a3851859e5f3 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -506,7 +506,8 @@ union bpf_attr {
FN(get_numa_node_id), \
FN(skb_change_head), \
FN(xdp_adjust_head), \
- FN(probe_read_str),
+ FN(probe_read_str), \
+ FN(get_socket_cookie),
/* integer value in 'imm' field of BPF_CALL instruction selects which helper
* function eBPF program intends to call