[PATCH net-next v5 02/15] net-timestamp: prepare for bpf prog use

[Jason Xing <kerneljasonxing@gmail.com>]

Later, I would introduce three points to report some information
to user space based on this.

Signed-off-by: Jason Xing <kerneljasonxing@gmail.com>
---
 include/net/sock.h |  7 +++++++
 net/core/sock.c    | 14 ++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/include/net/sock.h b/include/net/sock.h
index f5447b4b78fd..dd874e8337c0 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -2930,6 +2930,13 @@ int sock_set_timestamping(struct sock *sk, int optname,
 			  struct so_timestamping timestamping);
 
 void sock_enable_timestamps(struct sock *sk);
+#if defined(CONFIG_CGROUP_BPF) && defined(CONFIG_BPF_SYSCALL)
+void bpf_skops_tx_timestamping(struct sock *sk, struct sk_buff *skb, int op);
+#else
+static inline void bpf_skops_tx_timestamping(struct sock *sk, struct sk_buff *skb, int op)
+{
+}
+#endif
 void sock_no_linger(struct sock *sk);
 void sock_set_keepalive(struct sock *sk);
 void sock_set_priority(struct sock *sk, u32 priority);
diff --git a/net/core/sock.c b/net/core/sock.c
index eae2ae70a2e0..e06bcafb1b2d 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -948,6 +948,20 @@ int sock_set_timestamping(struct sock *sk, int optname,
 	return 0;
 }
 
+#if defined(CONFIG_CGROUP_BPF) && defined(CONFIG_BPF_SYSCALL)
+void bpf_skops_tx_timestamping(struct sock *sk, struct sk_buff *skb, int op)
+{
+	struct bpf_sock_ops_kern sock_ops;
+
+	memset(&sock_ops, 0, offsetof(struct bpf_sock_ops_kern, temp));
+	sock_ops.op = op;
+	if (sk_is_tcp(sk) && sk_fullsock(sk))
+		sock_ops.is_fullsock = 1;
+	sock_ops.sk = sk;
+	__cgroup_bpf_run_filter_sock_ops(sk, &sock_ops, CGROUP_SOCK_OPS);
+}
+#endif
+
 void sock_set_keepalive(struct sock *sk)
 {
 	lock_sock(sk);
-- 
2.43.5