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| author | lstewart <lstewart@FreeBSD.org> | 2010-12-28 03:27:20 +0000 |
|---|---|---|
| committer | lstewart <lstewart@FreeBSD.org> | 2010-12-28 03:27:20 +0000 |
| commit | 04373a011b12b5180ebb8a0de8062748f92f8c9c (patch) | |
| tree | 6d62c0d3f39dba74044c3db50a95d31a5f5eb953 /sys | |
| parent | 425155a6c9325e7a77cf2aa9c5a4eb57b003b722 (diff) | |
| download | FreeBSD-src-04373a011b12b5180ebb8a0de8062748f92f8c9c.zip FreeBSD-src-04373a011b12b5180ebb8a0de8062748f92f8c9c.tar.gz | |
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
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/netinet/tcp_sack.c | 1 | ||||
| -rw-r--r-- | sys/netinet/tcp_var.h | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/sys/netinet/tcp_sack.c b/sys/netinet/tcp_sack.c index 47d44ec..4134034 100644 --- a/sys/netinet/tcp_sack.c +++ b/sys/netinet/tcp_sack.c @@ -425,6 +425,7 @@ tcp_sack_doack(struct tcpcb *tp, struct tcpopt *to, tcp_seq th_ack) * 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 diff --git a/sys/netinet/tcp_var.h b/sys/netinet/tcp_var.h index a37d306..3305b1a 100644 --- a/sys/netinet/tcp_var.h +++ b/sys/netinet/tcp_var.h @@ -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 */ |
