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authorMichele Baldessari <michele@acksyn.org>2012-12-01 08:49:42 +0400
committerDavid S. Miller <davem@davemloft.net>2012-12-03 22:32:15 +0400
commit196d67593439b03088913227093e374235596e33 (patch)
treed8d1580673e3cf878d6db230bf86b71187bf3550 /net/sctp/transport.c
parent96070ae4d08eefe62ac534904ce21a01e1a5c9c4 (diff)
downloadlinux-196d67593439b03088913227093e374235596e33.tar.xz
sctp: Add support to per-association statistics via a new SCTP_GET_ASSOC_STATS call
The current SCTP stack is lacking a mechanism to have per association statistics. This is an implementation modeled after OpenSolaris' SCTP_GET_ASSOC_STATS. Userspace part will follow on lksctp if/when there is a general ACK on this. V4: - Move ipackets++ before q->immediate.func() for consistency reasons - Move sctp_max_rto() at the end of sctp_transport_update_rto() to avoid returning bogus RTO values - return asoc->rto_min when max_obs_rto value has not changed V3: - Increase ictrlchunks in sctp_assoc_bh_rcv() as well - Move ipackets++ to sctp_inq_push() - return 0 when no rto updates took place since the last call V2: - Implement partial retrieval of stat struct to cope for future expansion - Kill the rtxpackets counter as it cannot be precise anyway - Rename outseqtsns to outofseqtsns to make it clearer that these are out of sequence unexpected TSNs - Move asoc->ipackets++ under a lock to avoid potential miscounts - Fold asoc->opackets++ into the already existing asoc check - Kill unneeded (q->asoc) test when increasing rtxchunks - Do not count octrlchunks if sending failed (SCTP_XMIT_OK != 0) - Don't count SHUTDOWNs as SACKs - Move SCTP_GET_ASSOC_STATS to the private space API - Adjust the len check in sctp_getsockopt_assoc_stats() to allow for future struct growth - Move association statistics in their own struct - Update idupchunks when we send a SACK with dup TSNs - return min_rto in max_rto when RTO has not changed. Also return the transport when max_rto last changed. Signed-off: Michele Baldessari <michele@acksyn.org> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp/transport.c')
-rw-r--r--net/sctp/transport.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/sctp/transport.c b/net/sctp/transport.c
index 206cf5238fd3..310f11eb2206 100644
--- a/net/sctp/transport.c
+++ b/net/sctp/transport.c
@@ -363,6 +363,7 @@ void sctp_transport_update_rto(struct sctp_transport *tp, __u32 rtt)
if (tp->rto > tp->asoc->rto_max)
tp->rto = tp->asoc->rto_max;
+ sctp_max_rto(tp->asoc, tp);
tp->rtt = rtt;
/* Reset rto_pending so that a new RTT measurement is started when a
@@ -620,6 +621,7 @@ void sctp_transport_reset(struct sctp_transport *t)
t->burst_limited = 0;
t->ssthresh = asoc->peer.i.a_rwnd;
t->rto = asoc->rto_initial;
+ sctp_max_rto(asoc, t);
t->rtt = 0;
t->srtt = 0;
t->rttvar = 0;