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Andrei Pelinescu-Onciul 5fdd4baef6 sctp: on T3_RTX retransmit all the in-flight chunks 
When retransmitting due to T3 timeout, retransmit all the
in-flight chunks for the corresponding  transport/path, including
chunks sent less then 1 rto ago.
This is the correct behaviour according to rfc4960 section 6.3.3
E3 and
"Note: Any DATA chunks that were sent to the address for which the
 T3-rtx timer expired but did not fit in one MTU (rule E3 above)
 should be marked for retransmission and sent as soon as cwnd
 allows (normally, when a SACK arrives). ".

This fixes problems when more then one path is present and the T3
retransmission of the first chunk that timeouts stops the T3 timer
for the initial active path, leaving all the other in-flight
chunks waiting forever or until a new chunk is transmitted on the
same path and timeouts (and this will happen only if the cwnd
allows sending new chunks, but since cwnd was dropped to MTU by
the timeout => it will wait until the first heartbeat).

Example: 10 packets in flight, sent at 0.1 s intervals on the
primary path. The primary path is down and the first packet
timeouts. The first packet is retransmitted on another path, the
T3 timer for the primary path is stopped and cwnd is set to MTU.
All the other 9 in-flight packets will not be retransmitted
(unless more new packets are sent on the primary path which depend
on cwnd allowing it, and even in this case the 9 packets will be
retransmitted only after a new packet timeouts which even in the
best case would be more then RTO).

This commit reverts d0ce92910b and
also removes the now unused transport->last_rto, introduced in
 b6157d8e03.

p.s  The problem is not only when multiple paths are there.  It
can happen in a single homed environment.  If the application
stops sending data, it possible to have a hung association.

Signed-off-by: Andrei Pelinescu-Onciul <andrei@iptel.org>
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-29 00:14:02 -08:00
..
9p 9p: fix readdir corner cases 2009-11-02 08:43:45 -06:00
bluetooth Bluetooth: Handle L2CAP case when the remote receiver is busy 2009-08-26 00:12:20 -07:00
irda net: mark read-only arrays as const 2009-08-05 10:42:58 -07:00
iucv af_iucv: Return -EAGAIN if iucv msg limit is exceeded 2009-06-19 00:10:40 -07:00
netfilter netfilter: nf_nat: fix NAT issue in 2.6.30.4+ 2009-11-06 00:43:42 -08:00
netns netns: embed ip6_dst_ops directly 2009-09-01 17:40:31 -07:00
phonet Phonet: sockets list through proc_fs 2009-07-23 17:58:19 -07:00
sctp sctp: on T3_RTX retransmit all the in-flight chunks 2009-11-29 00:14:02 -08:00
tc_act pkt_action: add new action skbedit 2008-09-12 16:30:20 -07:00
tipc tipc: Remove unneeded parameter to tipc_createport_raw() 2008-07-14 22:42:19 -07:00
act_api.h net: restore gnet_stats_basic to previous definition 2009-08-17 21:33:49 -07:00
addrconf.h bonding: remap muticast addresses without using dev_close() and dev_open() 2009-09-15 02:37:40 -07:00
af_ieee802154.h af_ieee802154: add support for WANT_ACK socket option 2009-08-12 21:54:50 -07:00
af_rxrpc.h
af_unix.h net: Fix soft lockups/OOM issues w/ unix garbage collector 2008-11-26 15:32:27 -08:00
ah.h
arp.h net: make neigh_ops constant 2009-09-01 17:40:57 -07:00
atmclip.h clip: convert to internal network_device_stats 2009-01-21 14:01:59 -08:00
ax25.h
ax88796.h ax88796: Add method to take MAC from platform data 2009-03-24 23:32:03 -07:00
cfg80211.h cfg80211: fix dangling scan request checking 2009-08-20 11:36:05 -04:00
checksum.h include/net net/ - csum_partial - remove unnecessary casts 2008-11-19 15:44:53 -08:00
cipso_ipv4.h netlabel: Label incoming TCP connections correctly in SELinux 2009-03-28 15:01:36 +11:00
compat.h net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
datalink.h
dcbnl.h dcbnl: Add support for setapp/getapp to netdev dcbnl_rtnl_ops 2009-09-01 01:24:30 -07:00
dn_dev.h
dn_fib.h decnet: remove private wrappers of endian helpers 2008-11-27 00:12:47 -08:00
dn_neigh.h
dn_nsp.h
dn_route.h
dn.h decnet: compile fix for removal of byteorder wrapper 2008-11-27 23:04:13 -08:00
dsa.h dsa: add switch chip cascading support 2009-03-21 19:06:54 -07:00
dsfield.h
dst_ops.h netns: embed ip6_dst_ops directly 2009-09-01 17:40:31 -07:00
dst.h netns: embed ip6_dst_ops directly 2009-09-01 17:40:31 -07:00
esp.h
ethoc.h net: Add support for the OpenCores 10/100 Mbps Ethernet MAC. 2009-03-27 00:16:21 -07:00
fib_rules.h net: Remove unused parameter from fill method in fib_rules_ops. 2009-05-20 17:26:23 -07:00
flow.h netns xfrm: lookup in netns 2008-11-25 17:35:18 -08:00
garp.h vlan: Add GVRP support 2008-07-05 21:26:57 -07:00
gen_stats.h net: restore gnet_stats_basic to previous definition 2009-08-17 21:33:49 -07:00
genetlink.h genetlink: make netns aware 2009-07-12 14:03:27 -07:00
icmp.h mib: put icmpmsg statistics on struct net 2008-07-18 04:04:22 -07:00
ieee80211_radiotap.h wireless: radiotap updates 2009-03-27 20:12:52 -04:00
ieee802154_netdev.h ieee802154: add support for channel pages from IEEE 802.15.4-2006 2009-08-19 23:08:22 +04:00
ieee802154.h ieee802154: move headers out of extra directory 2009-07-23 17:08:51 +04:00
if_inet6.h ipv6: reorder struct inet6_ifaddr to remove padding on 64 bit builds 2009-03-21 13:29:05 -07:00
inet6_connection_sock.h
inet6_hashtables.h net: skb->dst accessors 2009-06-03 02:51:04 -07:00
inet_common.h
inet_connection_sock.h net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
inet_ecn.h net: replace __constant_{endian} uses in net headers 2009-02-14 22:58:35 -08:00
inet_frag.h inet fragments: fix sparse warning: context imbalance 2009-02-26 23:13:35 -08:00
inet_hashtables.h net: skb->dst accessors 2009-06-03 02:51:04 -07:00
inet_sock.h Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/vegard/kmemcheck 2009-06-16 13:09:51 -07:00
inet_timewait_sock.h net: Fix struct inet_timewait_sock bitfield annotation 2009-10-20 01:13:26 -07:00
inetpeer.h
ip6_checksum.h
ip6_fib.h xfrm: select sane defaults for xfrm[4|6] gc_thresh 2009-07-30 18:52:15 -07:00
ip6_route.h net: skb->dst accessors 2009-06-03 02:51:04 -07:00
ip6_tunnel.h
ip_fib.h net: Fix RPF to work with policy routing 2009-10-29 22:49:12 -07:00
ip_vs.h net: mark read-only arrays as const 2009-08-05 10:42:58 -07:00
ip.h net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
ipcomp.h ipsec: ipcomp - Merge IPComp implementations 2008-07-25 02:54:40 -07:00
ipconfig.h
ipip.h Revert "sit: stateless autoconf for isatap" 2009-09-26 20:28:07 -07:00
ipv6.h net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
ipx.h net: replace __constant_{endian} uses in net headers 2009-02-14 22:58:35 -08:00
iw_handler.h libipw: switch from ieee80211_* to libipw_* naming policy 2009-08-28 14:40:28 -04:00
lapb.h
lib80211.h wireless: missing include in lib80211.h 2008-11-21 11:42:55 -05:00
llc_c_ac.h
llc_c_ev.h
llc_c_st.h
llc_conn.h
llc_if.h
llc_pdu.h
llc_s_ac.h
llc_s_ev.h
llc_s_st.h
llc_sap.h
llc.h
mac80211.h mac80211: document ieee80211_rx() context requirement 2009-10-12 15:55:53 -04:00
mip6.h
ndisc.h sysctl: remove "struct file *" argument of ->proc_handler 2009-09-24 07:21:04 -07:00
neighbour.h net: make neigh_ops constant 2009-09-01 17:40:57 -07:00
net_namespace.h net: explain netns notifiers a little better 2009-07-20 08:03:00 -07:00
netdma.h net_dma: convert to dma_find_channel 2009-01-06 11:38:15 -07:00
netevent.h
netlabel.h netlabel: Cleanup the Smack/NetLabel code to fix incoming TCP connections 2009-03-28 15:01:37 +11:00
netlink.h netlink: constify nlmsghdr arguments 2009-08-25 16:07:40 +02:00
netrom.h netrom: convert to internal net_device_stats 2009-01-21 14:02:01 -08:00
nexthop.h
nl802154.h ieee802154: add support for channel pages from IEEE 802.15.4-2006 2009-08-19 23:08:22 +04:00
p8022.h
pkt_cls.h ematch: simpler tcf_em_unregister() 2008-11-16 23:01:49 -08:00
pkt_sched.h pkt_sched: Revert tasklet_hrtimer changes. 2009-09-01 17:59:25 -07:00
protocol.h net: constify struct inet6_protocol 2009-09-14 17:03:05 -07:00
psnap.h snap: use const for descriptor 2009-03-21 19:06:50 -07:00
raw.h
rawv6.h ipv6: Use correct data types for ICMPv6 type and code 2009-06-23 04:31:07 -07:00
red.h
regulatory.h cfg80211: clean up includes 2009-04-22 16:57:17 -04:00
request_sock.h net: Fix memory leak in the proto_register function 2008-11-21 16:45:22 -08:00
rose.h NET: ROSE: Don't use static buffer. 2009-07-26 19:11:14 -07:00
route.h net: skb->rtable accessor 2009-06-03 02:51:02 -07:00
rtnetlink.h Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-next-2.6 2009-09-10 18:17:09 -07:00
sch_generic.h pkt_sched: Fix tx queue selection in tc_modify_qdisc 2009-09-15 02:53:07 -07:00
scm.h cleanup: remove unused member in scm_cookie. 2009-07-05 19:16:10 -07:00
slhc_vj.h
snmp.h snmp: add missing counters for RFC 4293 2009-04-27 02:45:02 -07:00
sock.h net: Fix struct sock bitfield annotation 2009-10-11 23:03:52 -07:00
stp.h net: Add STP demux layer 2008-07-05 21:25:39 -07:00
tcp_states.h
tcp.h net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
timewait_sock.h net: Fix memory leak in the proto_register function 2008-11-21 16:45:22 -08:00
transp_v6.h inet: inet_connection_sock_af_ops const 2009-09-02 01:03:49 -07:00
udp.h net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
udplite.h udp: introduce struct udp_table and multiple spinlocks 2008-10-29 01:41:45 -07:00
wext.h wext: add back wireless/ dir in sysfs for cfg80211 interfaces 2009-09-28 16:55:07 -04:00
wimax.h rfkill: rewrite 2009-06-03 14:06:13 -04:00
wpan-phy.h ieee802154: add a sysfs representation of WPAN master devices 2009-08-19 23:08:20 +04:00
x25.h x25: Fix sleep from timer on socket destroy. 2009-06-16 05:40:30 -07:00
x25device.h
xfrm.h xfrm: select sane defaults for xfrm[4|6] gc_thresh 2009-07-30 18:52:15 -07:00