From e575235fc6026bb75e166ff68f84118c62d73f94 Mon Sep 17 00:00:00 2001 From: Daniel Borkmann Date: Wed, 11 Jun 2014 18:19:30 +0200 Subject: net: sctp: migrate most recently used transport to ktime Be more precise in transport path selection and use ktime helpers instead of jiffies to compare and pick the better primary and secondary recently used transports. This also avoids any side-effects during a possible roll-over, and could lead to better path decision-making. Signed-off-by: Daniel Borkmann Signed-off-by: David S. Miller --- net/sctp/associola.c | 8 +++++--- net/sctp/endpointola.c | 2 +- net/sctp/transport.c | 2 +- 3 files changed, 7 insertions(+), 5 deletions(-) (limited to 'net') diff --git a/net/sctp/associola.c b/net/sctp/associola.c index 9f1cc6f1535d..620c99e19e77 100644 --- a/net/sctp/associola.c +++ b/net/sctp/associola.c @@ -1036,7 +1036,7 @@ static void sctp_assoc_bh_rcv(struct work_struct *work) } if (chunk->transport) - chunk->transport->last_time_heard = jiffies; + chunk->transport->last_time_heard = ktime_get(); /* Run through the state machine. */ error = sctp_do_sm(net, SCTP_EVENT_T_CHUNK, subtype, @@ -1283,11 +1283,13 @@ static void sctp_select_active_and_retran_path(struct sctp_association *asoc) trans->state == SCTP_PF) continue; if (trans_pri == NULL || - trans->last_time_heard > trans_pri->last_time_heard) { + ktime_after(trans->last_time_heard, + trans_pri->last_time_heard)) { trans_sec = trans_pri; trans_pri = trans; } else if (trans_sec == NULL || - trans->last_time_heard > trans_sec->last_time_heard) { + ktime_after(trans->last_time_heard, + trans_sec->last_time_heard)) { trans_sec = trans; } } diff --git a/net/sctp/endpointola.c b/net/sctp/endpointola.c index 3d9f429858dc..9da76ba4d10f 100644 --- a/net/sctp/endpointola.c +++ b/net/sctp/endpointola.c @@ -481,7 +481,7 @@ normal: } if (chunk->transport) - chunk->transport->last_time_heard = jiffies; + chunk->transport->last_time_heard = ktime_get(); error = sctp_do_sm(net, SCTP_EVENT_T_CHUNK, subtype, state, ep, asoc, chunk, GFP_ATOMIC); diff --git a/net/sctp/transport.c b/net/sctp/transport.c index 1d348d15b33d..7dd672fa651f 100644 --- a/net/sctp/transport.c +++ b/net/sctp/transport.c @@ -72,7 +72,7 @@ static struct sctp_transport *sctp_transport_init(struct net *net, */ peer->rto = msecs_to_jiffies(net->sctp.rto_initial); - peer->last_time_heard = jiffies; + peer->last_time_heard = ktime_get(); peer->last_time_ecne_reduced = jiffies; peer->param_flags = SPP_HB_DISABLE | -- cgit v1.2.1