From 8465a5fcd1ceba8f2b55121d47b73f4025401490 Mon Sep 17 00:00:00 2001 From: Neil Horman Date: Thu, 17 Apr 2014 15:26:51 -0400 Subject: sctp: add support for busy polling to sctp protocol The busy polling socket option adds support for sockets to busy wait on data arriving on the napi queue from which they have most recently received a frame. Currently only tcp and udp support this feature, but theres no reason sctp can't do so as well. Add it in so appliations can take advantage of it Signed-off-by: Neil Horman CC: Vlad Yasevich CC: "David S. Miller" CC: Daniel Borkmann CC: netdev@vger.kernel.org Acked-by: Vlad Yasevich Acked-by: Daniel Borkmann Signed-off-by: David S. Miller --- net/sctp/socket.c | 5 +++++ net/sctp/ulpqueue.c | 4 ++++ 2 files changed, 9 insertions(+) (limited to 'net/sctp') diff --git a/net/sctp/socket.c b/net/sctp/socket.c index fee06b99a4da..e37b2cbbf177 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -71,6 +71,7 @@ #include #include #include +#include #include /* for sa_family_t */ #include @@ -6557,6 +6558,10 @@ static struct sk_buff *sctp_skb_recv_datagram(struct sock *sk, int flags, if (sk->sk_shutdown & RCV_SHUTDOWN) break; + if (sk_can_busy_loop(sk) && + sk_busy_loop(sk, noblock)) + continue; + /* User doesn't want to wait. */ error = -EAGAIN; if (!timeo) diff --git a/net/sctp/ulpqueue.c b/net/sctp/ulpqueue.c index 7144eb6a1b95..d49dc2ed30ad 100644 --- a/net/sctp/ulpqueue.c +++ b/net/sctp/ulpqueue.c @@ -38,6 +38,7 @@ #include #include #include +#include #include #include #include @@ -204,6 +205,9 @@ int sctp_ulpq_tail_event(struct sctp_ulpq *ulpq, struct sctp_ulpevent *event) if (sock_flag(sk, SOCK_DEAD) || (sk->sk_shutdown & RCV_SHUTDOWN)) goto out_free; + if (!sctp_ulpevent_is_notification(event)) + sk_mark_napi_id(sk, skb); + /* Check if the user wishes to receive this event. */ if (!sctp_ulpevent_is_enabled(event, &sctp_sk(sk)->subscribe)) goto out_free; -- cgit v1.2.1