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freebsd-dev/sys/netinet
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Hiren Panchasara 4e7f755377 FreeBSD tcp stack used to inform respective congestion control module about the 
loss event but not use or obay the recommendations i.e. values set by it in some
cases.

Here is an attempt to solve that confusion by following relevant RFCs/drafts.
Stack only sets congestion window/slow start threshold values when there is no
CC module availalbe to take that action. All CC modules are inspected and
updated when needed to take appropriate action on loss.

tcp_stacks/fastpath module has been updated to adapt these changes.

Note: Probably, the most significant change would be to not bring congestion
window down to 1MSS on a loss signaled by 3-duplicate acks and letting
respective CC decide that value.

In collaboration with:	Matt Macy <mmacy at nextbsd dot org>
Discussed on:		transport@ mailing list
Reviewed by:		jtl
MFC after:		1 month
Sponsored by:		Limelight Networks
Differential Revision:	https://reviews.freebsd.org/D8225
2016-10-25 05:45:47 +00:00
..
cc FreeBSD tcp stack used to inform respective congestion control module about the 2016-10-25 05:45:47 +00:00
khelp Remove "long" variables from the TCP stack (not including the modular 2016-10-06 16:28:34 +00:00
libalias sys/net*: minor spelling fixes. 2016-05-03 18:05:43 +00:00
tcp_stacks FreeBSD tcp stack used to inform respective congestion control module about the 2016-10-25 05:45:47 +00:00
accf_data.c
accf_dns.c
accf_http.c
icmp6.h Add missing constants from RFCs 4443 and 6550 2016-06-06 00:35:45 +00:00
icmp_var.h
if_atm.c
if_atm.h
if_ether.c Add GARP retransmit capability 2016-10-02 01:42:45 +00:00
if_ether.h This change re-adds L2 caching for TCP and UDP, as originally added in D4306 2016-06-02 17:51:29 +00:00
igmp_var.h
igmp.c With clang 3.9.0, compiling sys/netinet/igmp.c results in the following 2016-09-04 17:23:10 +00:00
igmp.h
in_cksum.c
in_debug.c
in_fib.c MFP r287070,r287073: split radix implementation and route table structure. 2016-01-25 06:33:15 +00:00
in_fib.h Merge helper fib* functions used for basic lookups. 2015-12-08 10:50:03 +00:00
in_gif.c Merge helper fib* functions used for basic lookups. 2015-12-08 10:50:03 +00:00
in_jail.c Move IPv4-specific jail functions to new file netinet/in_jail.c 2016-08-09 02:16:21 +00:00
in_kdtrace.c Fix style issues around existing SDT probes. 2015-12-16 23:39:27 +00:00
in_kdtrace.h Fix style issues around existing SDT probes. 2015-12-16 23:39:27 +00:00
in_mcast.c sys/net*: minor spelling fixes. 2016-05-03 18:05:43 +00:00
in_pcb.c - Revert r300854, r303657 which tried to fix regression from r297225. 2016-10-13 20:15:47 +00:00
in_pcb.h Add spares to struct ifnet and socket for packet pacing and/or general 2016-06-23 21:07:15 +00:00
in_pcbgroup.c Unbreak the RSS/PCBGROUp build. 2016-03-31 00:53:23 +00:00
in_prot.c Remove BSD and USL copyright and update license block in in_prot.c, as the 2016-07-28 18:39:30 +00:00
in_proto.c The pr_destroy field does not allow us to run the teardown code in a 2016-06-01 10:14:04 +00:00
in_rmx.c Code duplication but rib_head is special. Not found an easy way to go 2016-02-03 21:56:51 +00:00
in_rss.c Rename rss_soft_m2cpuid() -> rss_soft_m2cpuid_v4() in preparation for 2015-08-29 06:58:30 +00:00
in_rss.h Rename rss_soft_m2cpuid() -> rss_soft_m2cpuid_v4() in preparation for 2015-08-29 06:58:30 +00:00
in_systm.h Prepare for network stack as a module 2016-07-27 20:34:09 +00:00
in_var.h Add GARP retransmit capability 2016-10-02 01:42:45 +00:00
in.c Add GARP retransmit capability 2016-10-02 01:42:45 +00:00
in.h Don't iterate over the ifnet addr list in ip_output() 2016-08-18 22:59:00 +00:00
ip6.h
ip_carp.c Revert r292275 & r292379 2015-12-17 14:41:30 +00:00
ip_carp.h
ip_divert.c The pr_destroy field does not allow us to run the teardown code in a 2016-06-01 10:14:04 +00:00
ip_divert.h
ip_dummynet.h Import Dummynet AQM version 0.2.1 (CoDel, FQ-CoDel, PIE and FQ-PIE). 2016-05-26 21:40:13 +00:00
ip_ecn.c
ip_ecn.h Remove unneded #include "opt_inet.h". 2015-07-31 09:02:28 +00:00
ip_encap.c Remove sys/eventhandler.h from net/route.h 2016-01-09 09:34:39 +00:00
ip_encap.h
ip_fastfwd.c Cleanup unneded include "opt_ipfw.h". 2016-06-09 05:48:34 +00:00
ip_fw.h Add stats reset command implementation to NPTv6 module 2016-08-13 16:45:14 +00:00
ip_gre.c o Use new function ip_fillid() in all places throughout the kernel, 2015-04-01 22:26:39 +00:00
ip_icmp.c Make ICMPv6 hard error handling for TCP consistent with the ICMPv4 2016-10-21 10:32:57 +00:00
ip_icmp.h Add support for handling ICMP and ICMP6 messages sent in response 2016-04-29 20:22:01 +00:00
ip_id.c Replace a number of conflations of mp_ncpus and mp_maxid with either 2016-07-06 14:09:49 +00:00
ip_input.c Remove the 4.3BSD compatible macro m_copy(), use m_copym() instead. 2016-09-15 07:41:48 +00:00
ip_ipsec.c Remove the kernel optoion for IPSEC_FILTERTUNNEL, which was deprecated 2016-08-21 18:55:30 +00:00
ip_ipsec.h
ip_mroute.c Remove the 4.3BSD compatible macro m_copy(), use m_copym() instead. 2016-09-15 07:41:48 +00:00
ip_mroute.h
ip_options.c sys/net*: minor spelling fixes. 2016-05-03 18:05:43 +00:00
ip_options.h
ip_output.c Fix ip_output() on point-to-point links 2016-10-24 22:11:33 +00:00
ip_reass.c Fix RSS build - netisr input / NETISR_IP_DIRECT is used here. 2015-04-15 00:57:21 +00:00
ip_var.h The pr_destroy field does not allow us to run the teardown code in a 2016-06-01 10:14:04 +00:00
ip.h sys/net*: minor spelling fixes. 2016-05-03 18:05:43 +00:00
pim_var.h
pim.h
raw_ip.c Remove the 4.3BSD compatible macro m_copy(), use m_copym() instead. 2016-09-15 07:41:48 +00:00
sctp_asconf.c Add the UDP encaps port as a parameter to sctp_add_remote_addr(). 2016-04-30 14:25:00 +00:00
sctp_asconf.h
sctp_auth.c Address a potential memory leak found a the clang static code analyzer 2016-07-16 07:48:01 +00:00
sctp_auth.h
sctp_bsd_addr.c No functional changes, mostly getting the whitespace changes resulting 2016-10-22 17:21:21 +00:00
sctp_bsd_addr.h
sctp_cc_functions.c netinet/sctp*: minor spelling fixes in comments. 2016-05-02 20:56:11 +00:00
sctp_constants.h Fix the PR-SCTP behaviour. 2016-07-17 13:14:51 +00:00
sctp_crc32.c
sctp_crc32.h
sctp_dtrace_declare.h
sctp_dtrace_define.h This is work done by Michael Tuexen and myself at the IETF. This 2016-04-07 09:10:34 +00:00
sctp_header.h Fix the PR-SCTP behaviour. 2016-07-17 13:14:51 +00:00
sctp_indata.c Fix the handling of unordered fragmented user messages using DATA chunks. 2016-09-21 08:28:18 +00:00
sctp_indata.h A couple of minor changes that I missed that Michael had done, most noted 2016-04-07 09:34:41 +00:00
sctp_input.c Fix a bug, where no SACK is sent when receiving a FORWARD-TSN or 2016-08-26 07:49:23 +00:00
sctp_input.h Add FIB support for SCTP. 2015-06-17 15:20:14 +00:00
sctp_lock_bsd.h netinet/sctp*: minor spelling fixes in comments. 2016-05-02 20:56:11 +00:00
sctp_os_bsd.h A couple of minor changes that I missed that Michael had done, most noted 2016-04-07 09:34:41 +00:00
sctp_os.h
sctp_output.c No functional changes, mostly getting the whitespace changes resulting 2016-10-22 17:21:21 +00:00
sctp_output.h Don't allow a remote encapsulation port change during the 2016-01-30 12:58:38 +00:00
sctp_pcb.c Mark the socket as un-writable when it is 1-to-1 and the SCTP association 2016-10-13 13:53:01 +00:00
sctp_pcb.h netinet/sctp*: minor spelling fixes in comments. 2016-05-02 20:56:11 +00:00
sctp_peeloff.c
sctp_peeloff.h
sctp_ss_functions.c Mark an unused parameter as such. 2016-08-06 12:51:07 +00:00
sctp_structs.h Fix various bugs in relation to the I-DATA chunk support 2016-08-06 12:33:15 +00:00
sctp_syscalls.c capsicum: propagate rights on accept(2) 2016-09-22 09:58:46 +00:00
sctp_sysctl.c netstat and sockstat expect the IPv6 link local addresses to 2016-07-19 09:48:08 +00:00
sctp_sysctl.h Retire net.inet.sctp.strict_sacks and net.inet.sctp.strict_data_order 2016-05-12 16:34:59 +00:00
sctp_timer.c Cleanup a comment. 2016-05-09 16:35:05 +00:00
sctp_timer.h Code cleanup which will silence a warning in PVS / D5245. 2016-02-17 18:04:22 +00:00
sctp_uio.h Add a constant required by RFC 7496. 2016-07-17 13:33:35 +00:00
sctp_usrreq.c Remove duplicate code, which is not protected by the appropriate locks. 2016-08-22 00:40:45 +00:00
sctp_var.h The pr_destroy field does not allow us to run the teardown code in a 2016-06-01 10:14:04 +00:00
sctp.h This is work done by Michael Tuexen and myself at the IETF. This 2016-04-07 09:10:34 +00:00
sctputil.c When aborting an association, send the ABORT before notifying the upper 2016-08-24 06:22:53 +00:00
sctputil.h Remove a function, which is not used anymore. 2016-04-23 09:15:58 +00:00
siftr.c Use SI_SUB_LAST instead of SI_SUB_SMP as the "catch-all" subsystem. 2016-03-11 23:18:06 +00:00
tcp_debug.c Remove "long" variables from the TCP stack (not including the modular 2016-10-06 16:28:34 +00:00
tcp_debug.h
tcp_fastopen.c Fix kernel build with TCP_RFC7413 option 2016-08-11 23:52:24 +00:00
tcp_fastopen.h Implementation of server-side TCP Fast Open (TFO) [RFC7413]. 2015-12-24 19:09:48 +00:00
tcp_fsm.h Update TCPS_HAVERCVDFIN() macro to correctly include all states a connection 2016-08-26 17:48:54 +00:00
tcp_hostcache.c Remove "long" variables from the TCP stack (not including the modular 2016-10-06 16:28:34 +00:00
tcp_hostcache.h Remove "long" variables from the TCP stack (not including the modular 2016-10-06 16:28:34 +00:00
tcp_input.c FreeBSD tcp stack used to inform respective congestion control module about the 2016-10-25 05:45:47 +00:00
tcp_lro.c Pass the number of segments coalesced by LRO up the stack by repurposing the 2016-08-25 13:33:32 +00:00
tcp_lro.h tcp/lro: Implement hash table for LRO entries. 2016-08-02 06:36:47 +00:00
tcp_offload.c Augment struct tcpstat with tcps_states[], which is used for book-keeping 2016-01-27 00:45:46 +00:00
tcp_offload.h
tcp_output.c The TFO server-side code contains some changes that are not conditioned on 2016-10-12 19:06:50 +00:00
tcp_pcap.c The TCPPCAP debugging feature caches recently-used mbufs for use in 2016-07-06 16:17:13 +00:00
tcp_pcap.h The TCPPCAP debugging feature caches recently-used mbufs for use in 2016-07-06 16:17:13 +00:00
tcp_reass.c Remove sys/eventhandler.h from net/route.h 2016-01-09 09:34:39 +00:00
tcp_sack.c sys/net*: minor spelling fixes. 2016-05-03 18:05:43 +00:00
tcp_seq.h Remove "long" variables from the TCP stack (not including the modular 2016-10-06 16:28:34 +00:00
tcp_subr.c Make ICMPv6 hard error handling for TCP consistent with the ICMPv4 2016-10-21 10:32:57 +00:00
tcp_syncache.c Fix cases where the TFO pending counter would leak references, and eventually, memory. 2016-10-15 01:41:28 +00:00
tcp_syncache.h Grab a snap amount of TCP connections in syncache from tcpstat. 2016-01-27 00:48:05 +00:00
tcp_timer.c The code currently resets the keepalive timer each time a packet is 2016-10-14 14:57:43 +00:00
tcp_timer.h This cleans up the timer code in TCP and also makes it so we do not 2016-08-16 12:40:56 +00:00
tcp_timewait.c Fix a double-free when an inp transitions to INP_TIMEWAIT state 2016-10-18 07:16:49 +00:00
tcp_usrreq.c Fix a double-free when an inp transitions to INP_TIMEWAIT state 2016-10-18 07:16:49 +00:00
tcp_var.h The TFO server-side code contains some changes that are not conditioned on 2016-10-12 19:06:50 +00:00
tcp.h Provide new socket option TCP_CCALGOOPT, which stands for TCP congestion 2016-01-22 02:07:48 +00:00
tcpip.h
toecore.c This change re-adds L2 caching for TCP and UDP, as originally added in D4306 2016-06-02 17:51:29 +00:00
toecore.h
udp_usrreq.c r297225 broke udp_output() for the case where the "addr" argument 2016-10-01 19:39:09 +00:00
udp_var.h The pr_destroy field does not allow us to run the teardown code in a 2016-06-01 10:14:04 +00:00
udp.h
udplite.h