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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 /include/linux/sock_diag.h
parentMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net (diff)
downloadlinux-dev-91b8270f2a4d1d9b268de90451cdca63a70052d6.tar.xz
linux-dev-91b8270f2a4d1d9b268de90451cdca63a70052d6.zip
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 'include/linux/sock_diag.h')
-rw-r--r--include/linux/sock_diag.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/sock_diag.h b/include/linux/sock_diag.h
index a0596ca0e80a..a2f8109bb215 100644
--- a/include/linux/sock_diag.h
+++ b/include/linux/sock_diag.h
@@ -24,6 +24,7 @@ void sock_diag_unregister(const struct sock_diag_handler *h);
void sock_diag_register_inet_compat(int (*fn)(struct sk_buff *skb, struct nlmsghdr *nlh));
void sock_diag_unregister_inet_compat(int (*fn)(struct sk_buff *skb, struct nlmsghdr *nlh));
+u64 sock_gen_cookie(struct sock *sk);
int sock_diag_check_cookie(struct sock *sk, const __u32 *cookie);
void sock_diag_save_cookie(struct sock *sk, __u32 *cookie);