sctp: add support for RPS and RFS

This patch adds what's missing to properly support RPS and RFS on SCTP, as some of it is already implemented in common calls. Having support for RPS and RFS allows better scaling specially because not all NICs support hashing SCTP headers. Save the hash right when we dequeue a skb from inqueue so we do it only once per skb instead of per chunk. New sockets will then inherit the hash through sctp_copy_sock(). Signed-off-by: Marcelo Ricardo Leitner <[email protected]> Signed-off-by: David S. Miller <[email protected]>
TechNexion · Apr 15, 2016 · 486bdee · 486bdee
1 parent d21fd63
commit 486bdee
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diff --git a/net/sctp/inqueue.c b/net/sctp/inqueue.c
@@ -163,6 +163,9 @@ struct sctp_chunk *sctp_inq_pop(struct sctp_inq *queue)
 		chunk->singleton = 1;
 		ch = (sctp_chunkhdr_t *) chunk->skb->data;
 		chunk->data_accepted = 0;
+
+		if (chunk->asoc)
+			sock_rps_save_rxhash(chunk->asoc->base.sk, chunk->skb);
 	}
 
 	chunk->chunk_hdr = ch;

diff --git a/net/sctp/socket.c b/net/sctp/socket.c
@@ -6430,6 +6430,8 @@ unsigned int sctp_poll(struct file *file, struct socket *sock, poll_table *wait)
 
 	poll_wait(file, sk_sleep(sk), wait);
 
+	sock_rps_record_flow(sk);
+
 	/* A TCP-style listening socket becomes readable when the accept queue
 	 * is not empty.
 	 */
@@ -7186,6 +7188,7 @@ void sctp_copy_sock(struct sock *newsk, struct sock *sk,
 	newsk->sk_lingertime = sk->sk_lingertime;
 	newsk->sk_rcvtimeo = sk->sk_rcvtimeo;
 	newsk->sk_sndtimeo = sk->sk_sndtimeo;
+	newsk->sk_rxhash = sk->sk_rxhash;
 
 	newinet = inet_sk(newsk);