[PATCH net-next v1 2/2] tipc: allow rdm/dgram socketpairs

[Parthasarathy Bhuvaragan]

From: Erik Hugne <erik.hu...@gmail.com>

for socketpairs using connectionless transport, we cache
the respective node local TIPC portid to use in subsequent
calls to send() in the socket's private data.

Signed-off-by: Erik Hugne <erik.hu...@gmail.com>
Signed-off-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvara...@ericsson.com>
---
 net/tipc/socket.c | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 1198dddf72e8..15f6ce7bf868 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -2515,9 +2515,21 @@ static int tipc_socketpair(struct socket *sock1, struct 
socket *sock2)
 {
        struct tipc_sock *tsk2 = tipc_sk(sock2->sk);
        struct tipc_sock *tsk1 = tipc_sk(sock1->sk);
-
-       tipc_sk_finish_conn(tsk1, tsk2->portid, 0);
-       tipc_sk_finish_conn(tsk2, tsk1->portid, 0);
+       u32 onode = tipc_own_addr(sock_net(sock1->sk));
+
+       tsk1->peer.family = AF_TIPC;
+       tsk1->peer.addrtype = TIPC_ADDR_ID;
+       tsk1->peer.scope = TIPC_NODE_SCOPE;
+       tsk1->peer.addr.id.ref = tsk2->portid;
+       tsk1->peer.addr.id.node = onode;
+       tsk2->peer.family = AF_TIPC;
+       tsk2->peer.addrtype = TIPC_ADDR_ID;
+       tsk2->peer.scope = TIPC_NODE_SCOPE;
+       tsk2->peer.addr.id.ref = tsk1->portid;
+       tsk2->peer.addr.id.node = onode;
+
+       tipc_sk_finish_conn(tsk1, tsk2->portid, onode);
+       tipc_sk_finish_conn(tsk2, tsk1->portid, onode);
        return 0;
 }
 
@@ -2529,7 +2541,7 @@ static const struct proto_ops msg_ops = {
        .release        = tipc_release,
        .bind           = tipc_bind,
        .connect        = tipc_connect,
-       .socketpair     = sock_no_socketpair,
+       .socketpair     = tipc_socketpair,
        .accept         = sock_no_accept,
        .getname        = tipc_getname,
        .poll           = tipc_poll,
-- 
2.1.4