From 196d67593439b03088913227093e374235596e33 Mon Sep 17 00:00:00 2001 From: Michele Baldessari Date: Sat, 1 Dec 2012 04:49:42 +0000 Subject: 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 Acked-by: Vlad Yasevich Signed-off-by: David S. Miller --- net/sctp/endpointola.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'net/sctp/endpointola.c') diff --git a/net/sctp/endpointola.c b/net/sctp/endpointola.c index 1859e2bc83d1..32ab55b18281 100644 --- a/net/sctp/endpointola.c +++ b/net/sctp/endpointola.c @@ -480,8 +480,11 @@ normal: */ if (asoc && sctp_chunk_is_data(chunk)) asoc->peer.last_data_from = chunk->transport; - else + else { SCTP_INC_STATS(sock_net(ep->base.sk), SCTP_MIB_INCTRLCHUNKS); + if (asoc) + asoc->stats.ictrlchunks++; + } if (chunk->transport) chunk->transport->last_time_heard = jiffies; -- cgit v1.2.3