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 <[email protected]> --- include/uapi/linux/tipc.h | 1 + net/tipc/socket.c | 3 +++ 2 files changed, 4 insertions(+) diff --git a/include/uapi/linux/tipc.h b/include/uapi/linux/tipc.h index 6b2fd4d9655f..7df026ea6aff 100644 --- a/include/uapi/linux/tipc.h +++ b/include/uapi/linux/tipc.h @@ -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 diff --git a/net/tipc/socket.c b/net/tipc/socket.c index 8ac8ddf1e324..1385207a301f 100644 --- a/net/tipc/socket.c +++ b/net/tipc/socket.c @@ -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) -- 2.17.1 _______________________________________________ tipc-discussion mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/tipc-discussion
