Date: Tue, 28 Dec 2010 03:27:20 +0000 (UTC) From: Lawrence Stewart <lstewart@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r216753 - head/sys/netinet Message-ID: <201012280327.oBS3RKCH045287@svn.freebsd.org>
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Author: lstewart Date: Tue Dec 28 03:27:20 2010 New Revision: 216753 URL: http://svn.freebsd.org/changeset/base/216753 Log: Add a new sack hint to track the most recent and highest sacked sequence number. This will be used by the incoming Enhanced RTT Khelp module. Sponsored by: FreeBSD Foundation Submitted by: David Hayes <dahayes at swin edu au> Reviewed by: bz and others (as part of a larger patch) MFC after: 3 months Modified: head/sys/netinet/tcp_sack.c head/sys/netinet/tcp_var.h Modified: head/sys/netinet/tcp_sack.c ============================================================================== --- head/sys/netinet/tcp_sack.c Tue Dec 28 02:45:24 2010 (r216752) +++ head/sys/netinet/tcp_sack.c Tue Dec 28 03:27:20 2010 (r216753) @@ -425,6 +425,7 @@ tcp_sack_doack(struct tcpcb *tp, struct * are received. */ sblkp = &sack_blocks[num_sack_blks - 1]; /* Last SACK block */ + tp->sackhint.last_sack_ack = sblkp->end; if (SEQ_LT(tp->snd_fack, sblkp->start)) { /* * The highest SACK block is beyond fack. Append new SACK Modified: head/sys/netinet/tcp_var.h ============================================================================== --- head/sys/netinet/tcp_var.h Tue Dec 28 02:45:24 2010 (r216752) +++ head/sys/netinet/tcp_var.h Tue Dec 28 03:27:20 2010 (r216753) @@ -70,6 +70,7 @@ struct sackhole { struct sackhint { struct sackhole *nexthole; int sack_bytes_rexmit; + tcp_seq last_sack_ack; /* Most recent/largest sacked ack */ int ispare; /* explicit pad for 64bit alignment */ uint64_t _pad[2]; /* 1 sacked_bytes, 1 TBD */
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