Date: Tue, 16 Sep 2014 13:48:46 +0000 (UTC) From: Michael Tuexen <tuexen@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r271672 - head/sys/netinet Message-ID: <201409161348.s8GDmkvQ077081@svn.freebsd.org>
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Author: tuexen Date: Tue Sep 16 13:48:46 2014 New Revision: 271672 URL: http://svnweb.freebsd.org/changeset/base/271672 Log: Small cleanup which addresses a warning regaring the truncation of a 64-bit entity to a 32-bit entity. This issue was reported by Peter Kasting from Google. MFC after: 3 days Modified: head/sys/netinet/sctp_cc_functions.c Modified: head/sys/netinet/sctp_cc_functions.c ============================================================================== --- head/sys/netinet/sctp_cc_functions.c Tue Sep 16 11:07:25 2014 (r271671) +++ head/sys/netinet/sctp_cc_functions.c Tue Sep 16 13:48:46 2014 (r271672) @@ -1130,12 +1130,9 @@ sctp_cwnd_update_after_packet_dropped(st uint32_t * bottle_bw, uint32_t * on_queue) { uint32_t bw_avail; - int rtt; unsigned int incr; int old_cwnd = net->cwnd; - /* need real RTT in msd for this calc */ - rtt = net->rtt / 1000; /* get bottle neck bw */ *bottle_bw = ntohl(cp->bottle_bw); /* and whats on queue */ @@ -1144,10 +1141,11 @@ sctp_cwnd_update_after_packet_dropped(st * adjust the on-queue if our flight is more it could be that the * router has not yet gotten data "in-flight" to it */ - if (*on_queue < net->flight_size) + if (*on_queue < net->flight_size) { *on_queue = net->flight_size; - /* calculate the available space */ - bw_avail = (*bottle_bw * rtt) / 1000; + } + /* rtt is measured in micro seconds, bottle_bw in bytes per second */ + bw_avail = (uint32_t) (((uint64_t) (*bottle_bw) * net->rtt) / (uint64_t) 1000000); if (bw_avail > *bottle_bw) { /* * Cap the growth to no more than the bottle neck. This can @@ -1167,7 +1165,6 @@ sctp_cwnd_update_after_packet_dropped(st int seg_inflight, seg_onqueue, my_portion; net->partial_bytes_acked = 0; - /* how much are we over queue size? */ incr = *on_queue - bw_avail; if (stcb->asoc.seen_a_sack_this_pkt) {
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