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 <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sctp/associola.c b/net/sctp/associola.c
index 9f1cc6f..620c99e 100644
--- a/net/sctp/associola.c
+++ b/net/sctp/associola.c
@@ -1036,7 +1036,7 @@
}
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 @@
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;
}
}