Date: Mon, 13 Oct 2014 21:06:21 +0000 (UTC) From: Sean Bruno <sbruno@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r273063 - head/sys/netinet Message-ID: <201410132106.s9DL6LKK069353@svn.freebsd.org>
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Author: sbruno Date: Mon Oct 13 21:06:21 2014 New Revision: 273063 URL: https://svnweb.freebsd.org/changeset/base/273063 Log: Handle small file case with regards to plpmtud blackhole detection. Submitted by: Mikhail <mp@lenta.ru> MFC after: 2 weeks Relnotes: yes Modified: head/sys/netinet/tcp_timer.c Modified: head/sys/netinet/tcp_timer.c ============================================================================== --- head/sys/netinet/tcp_timer.c Mon Oct 13 21:05:29 2014 (r273062) +++ head/sys/netinet/tcp_timer.c Mon Oct 13 21:06:21 2014 (r273063) @@ -693,7 +693,15 @@ tcp_timer_rexmt(void * xtp) TCPT_RANGESET(tp->t_rxtcur, rexmt, tp->t_rttmin, TCPTV_REXMTMAX); - if (V_tcp_pmtud_blackhole_detect && (tp->t_state == TCPS_ESTABLISHED)) { + /* + * We enter the path for PLMTUD if connection is established or, if + * connection is FIN_WAIT_1 status, reason for the last is that if + * amount of data we send is very small, we could send it in couple of + * packets and process straight to FIN. In that case we won't catch + * ESTABLISHED state. + */ + if (V_tcp_pmtud_blackhole_detect && (((tp->t_state == TCPS_ESTABLISHED)) + || (tp->t_state == TCPS_FIN_WAIT_1))) { int optlen; #ifdef INET6 int isipv6;
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