From 3bb533800c698d5e8a8b01dbfc37e147260988f2 Mon Sep 17 00:00:00 2001 From: Jon Paul Maloy Date: Thu, 13 Feb 2014 17:29:12 -0500 Subject: [PATCH] tipc: change signature of tunnelling reception function After the earlier commits in this series related to the function tipc_link_tunnel_rcv(), we can now go further and simplify its signature. The function now consumes all DUPLICATE packets, and only returns such ORIGINAL packets that are ready for immediate delivery, i.e., no more link level protocol processing needs to be done by the caller. As a consequence, the the caller, tipc_rcv(), does not access the link pointer after call return, and it becomes unnecessary to pass a link pointer reference in the call. Instead, we now only pass it the tunnel link's owner node, which is sufficient to find the destination link for the tunnelled packet. Signed-off-by: Jon Maloy Reviewed-by: Ying Xue Signed-off-by: David S. Miller --- net/tipc/link.c | 14 ++++---------- 1 file changed, 4 insertions(+), 10 deletions(-) diff --git a/net/tipc/link.c b/net/tipc/link.c index 26a54f4f3c63..f9f90681a59d 100644 --- a/net/tipc/link.c +++ b/net/tipc/link.c @@ -78,7 +78,7 @@ static const char *link_unk_evt = "Unknown link event "; static void link_handle_out_of_seq_msg(struct tipc_link *l_ptr, struct sk_buff *buf); static void link_recv_proto_msg(struct tipc_link *l_ptr, struct sk_buff *buf); -static int tipc_link_tunnel_rcv(struct tipc_link **l_ptr, +static int tipc_link_tunnel_rcv(struct tipc_node *n_ptr, struct sk_buff **buf); static void link_set_supervision_props(struct tipc_link *l_ptr, u32 tolerance); static int link_send_sections_long(struct tipc_port *sender, @@ -1597,7 +1597,7 @@ deliver: tipc_node_unlock(n_ptr); continue; case CHANGEOVER_PROTOCOL: - if (!tipc_link_tunnel_rcv(&l_ptr, &buf)) + if (!tipc_link_tunnel_rcv(n_ptr, &buf)) break; msg = buf_msg(buf); seq_no = msg_seqno(msg); @@ -2174,7 +2174,7 @@ exit: * returned to the active link for delivery upwards. * Owner node is locked. */ -static int tipc_link_tunnel_rcv(struct tipc_link **l_ptr, +static int tipc_link_tunnel_rcv(struct tipc_node *n_ptr, struct sk_buff **buf) { struct sk_buff *tunnel_buf = *buf; @@ -2186,15 +2186,9 @@ static int tipc_link_tunnel_rcv(struct tipc_link **l_ptr, if (bearer_id >= MAX_BEARERS) goto exit; - dest_link = (*l_ptr)->owner->links[bearer_id]; + dest_link = n_ptr->links[bearer_id]; if (!dest_link) goto exit; - if (dest_link == *l_ptr) { - pr_err("Unexpected changeover message on link <%s>\n", - (*l_ptr)->name); - goto exit; - } - *l_ptr = dest_link; if (msg_typ == DUPLICATE_MSG) { tipc_link_dup_rcv(dest_link, tunnel_buf); -- 2.20.1