[PATCH net-next 09/13] mptcp: setsockopt: add SO_MARK support

[Mat Martineau]

From: Florian Westphal <f...@strlen.de>

Value is synced to all subflows.

Acked-by: Paolo Abeni <pab...@redhat.com>
Signed-off-by: Florian Westphal <f...@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martin...@linux.intel.com>
---
 net/mptcp/sockopt.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/net/mptcp/sockopt.c b/net/mptcp/sockopt.c
index ee5d58747ce7..1ad6092811e5 100644
--- a/net/mptcp/sockopt.c
+++ b/net/mptcp/sockopt.c
@@ -95,6 +95,12 @@ static void mptcp_sol_socket_sync_intval(struct mptcp_sock 
*msk, int optname, in
                        ssk->sk_userlocks |= SOCK_RCVBUF_LOCK;
                        WRITE_ONCE(ssk->sk_rcvbuf, sk->sk_rcvbuf);
                        break;
+               case SO_MARK:
+                       if (READ_ONCE(ssk->sk_mark) != sk->sk_mark) {
+                               ssk->sk_mark = sk->sk_mark;
+                               sk_dst_reset(ssk);
+                       }
+                       break;
                }
 
                subflow->setsockopt_seq = msk->setsockopt_seq;
@@ -132,6 +138,7 @@ static int mptcp_setsockopt_sol_socket_int(struct 
mptcp_sock *msk, int optname,
        case SO_KEEPALIVE:
                mptcp_sol_socket_sync_intval(msk, optname, val);
                return 0;
+       case SO_MARK:
        case SO_PRIORITY:
        case SO_SNDBUF:
        case SO_SNDBUFFORCE:
@@ -222,6 +229,7 @@ static int mptcp_setsockopt_sol_socket(struct mptcp_sock 
*msk, int optname,
        case SO_SNDBUFFORCE:
        case SO_RCVBUF:
        case SO_RCVBUFFORCE:
+       case SO_MARK:
                return mptcp_setsockopt_sol_socket_int(msk, optname, optval, 
optlen);
        case SO_LINGER:
                return mptcp_setsockopt_sol_socket_linger(msk, optval, optlen);
-- 
2.31.1