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authorChenbo Feng <fengc@google.com>2017-03-23 03:27:34 +0300
committerDavid S. Miller <davem@davemloft.net>2017-03-24 03:01:02 +0300
commit91b8270f2a4d1d9b268de90451cdca63a70052d6 (patch)
treecca836d388f189d98179ab3dc51d1afbffa0a6e9 /net/core/sock_diag.c
parent16ae1f223601c44e5cb65c99257ffae003504704 (diff)
downloadlinux-91b8270f2a4d1d9b268de90451cdca63a70052d6.tar.xz
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 'net/core/sock_diag.c')
-rw-r--r--net/core/sock_diag.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/core/sock_diag.c b/net/core/sock_diag.c
index 8d11ee75a100..fb9d0e2fd148 100644
--- a/net/core/sock_diag.c
+++ b/net/core/sock_diag.c
@@ -19,7 +19,7 @@ static int (*inet_rcv_compat)(struct sk_buff *skb, struct nlmsghdr *nlh);
static DEFINE_MUTEX(sock_diag_table_mutex);
static struct workqueue_struct *broadcast_wq;
-static u64 sock_gen_cookie(struct sock *sk)
+u64 sock_gen_cookie(struct sock *sk)
{
while (1) {
u64 res = atomic64_read(&sk->sk_cookie);