tipc: Add socket options to get number of queued messages

This patch allows a TIPC application to determine the number of messages
currently waiting in a socket's receive queue (TIPC_SOCK_RECVQ_DEPTH) or
in all TIPC socket receive queues (TIPC_NODE_RECVQ_DEPTH).

Signed-off-by: Oscar Medina <oscar.medina@motorola.com>
Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 0 deletions

diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 1848693ebb82..e8254e809b79 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -1748,6 +1748,12 @@ static int getsockopt(struct socket *sock,
                 value = jiffies_to_msecs(sk->sk_rcvtimeo);
                 /* no need to set "res", since already 0 at this point */
                 break;
+         case TIPC_NODE_RECVQ_DEPTH:
+                value = (u32)atomic_read(&tipc_queue_size);
+                break;
+         case TIPC_SOCK_RECVQ_DEPTH:
+                value = skb_queue_len(&sk->sk_receive_queue);
+                break;
         default:
                 res = -EINVAL;
         }