tipc: introduce new socket option TIPC_SOCK_RECVQ_USED (42e5425a) · Commits · 戴 / test

When using TIPC_SOCK_RECVQ_DEPTH for getsockopt(), it returns the number of buffers in receive socket buffer which is not so helpful for user space applications. This commit introduces the new option TIPC_SOCK_RECVQ_USED which returns the current allocated bytes of the receive socket buffer. This helps user space applications dimension its buffer usage to avoid buffer overload issue. Signed-off-by:

Tung Nguyen <tung.q.nguyen@dektech.com.au> Acked-by:

Jon Maloy <jon.maloy@ericsson.com> Signed-off-by:

David S. Miller <davem@davemloft.net>

include/uapi/linux/tipc.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -190,6 +190,7 @@ struct sockaddr_tipc {
		#define TIPC_MCAST_REPLICAST 134 /* Default: TIPC selects. No arg */
		#define TIPC_GROUP_JOIN 135 /* Takes struct tipc_group_req* */
		#define TIPC_GROUP_LEAVE 136 /* No argument */
		#define TIPC_SOCK_RECVQ_USED 137 /* Default: none (read only) */

		/*
		* Flag values

net/tipc/socket.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -3070,6 +3070,9 @@ static int tipc_getsockopt(struct socket *sock, int lvl, int opt,
		case TIPC_SOCK_RECVQ_DEPTH:
		value = skb_queue_len(&sk->sk_receive_queue);
		break;
		case TIPC_SOCK_RECVQ_USED:
		value = sk_rmem_alloc_get(sk);
		break;
		case TIPC_GROUP_JOIN:
		seq.type = 0;
		if (tsk->group)

Admin message