svn commit: r280404 - head/sys/netinet

[Michael Tuexen]

Author: tuexen
Date: Mon Mar 23 23:34:21 2015
New Revision: 280404
URL: https://svnweb.freebsd.org/changeset/base/280404

Log:
  When an ICMP message is received and the MTU shrinks, only
  mark outstanding chunks for retransmissions.
  
  MFC after: 3 days

Modified:
  head/sys/netinet/sctp_usrreq.c

Modified: head/sys/netinet/sctp_usrreq.c
==============================================================================
--- head/sys/netinet/sctp_usrreq.c	Mon Mar 23 23:06:32 2015	(r280403)
+++ head/sys/netinet/sctp_usrreq.c	Mon Mar 23 23:34:21 2015	(r280404)
@@ -125,21 +125,19 @@ sctp_pathmtu_adjustment(struct sctp_tcb 
 			if (chk->sent < SCTP_DATAGRAM_RESEND) {
 				sctp_flight_size_decrease(chk);
 				sctp_total_flight_decrease(stcb, chk);
-			}
-			if (chk->sent != SCTP_DATAGRAM_RESEND) {
+				chk->sent = SCTP_DATAGRAM_RESEND;
 				sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
+				chk->rec.data.doing_fast_retransmit = 0;
+				if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
+					sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_PMTU,
+					    chk->whoTo->flight_size,
+					    chk->book_size,
+					    (uintptr_t) chk->whoTo,
+					    chk->rec.data.TSN_seq);
+				}
+				/* Clear any time so NO RTT is being done */
+				chk->do_rtt = 0;
 			}
-			chk->sent = SCTP_DATAGRAM_RESEND;
-			chk->rec.data.doing_fast_retransmit = 0;
-			if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
-				sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_PMTU,
-				    chk->whoTo->flight_size,
-				    chk->book_size,
-				    (uintptr_t) chk->whoTo,
-				    chk->rec.data.TSN_seq);
-			}
-			/* Clear any time so NO RTT is being done */
-			chk->do_rtt = 0;
 		}
 	}
 }