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opnsense-src/sys/netinet
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Gleb Smirnoff 2e27230ff9 tcp_hpts: rewrite inpcb synchronization 
Just trust the pcb database, that if we did in_pcbref(), no way
an inpcb can go away.  And if we never put a dropped inpcb on
our queue, and tcp_discardcb() always removes an inpcb to be
dropped from the queue, then any inpcb on the queue is valid.

Now, to solve LOR between inpcb lock and HPTS queue lock do the
following trick.  When we are about to process a certain time
slot, take the full queue of the head list into on stack list,
drop the HPTS lock and work on our queue.  This of course opens
a race when an inpcb is being removed from the on stack queue,
which was already mentioned in comments.  To address this race
introduce generation count into queues.  If we want to remove
an inpcb with generation count mismatch, we can't do that, we
can only mark it with desired new time slot or -1 for remove.

Reviewed by:		rrs
Differential revision:	https://reviews.freebsd.org/D33026
2021-12-02 10:48:49 -08:00
..
cc tcp: unloading a module that is set to default should error. 2021-12-02 06:12:16 -05:00
khelp
libalias Fix fragmented UDP packets handling since rev.360967. 2021-10-15 16:48:12 -07:00
netdump netdump: send key before dump, in case dump fails 2021-08-11 10:54:56 -05:00
tcp_stacks tcp_hpts: rename input queue to drop queue and trim dead code 2021-12-02 10:48:48 -08:00
accf_data.c Define a module version for accept filter modules. 2020-05-19 18:35:08 +00:00
accf_dns.c Define a module version for accept filter modules. 2020-05-19 18:35:08 +00:00
accf_http.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
dccp.h Add header definition for RFC4340, Datagram Congestion Control Protocol 2020-06-17 13:27:13 +00:00
icmp6.h icmp6: Count packets dropped due to an invalid hop limit 2020-10-19 17:07:19 +00:00
icmp_var.h net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
if_ether.c Use network epoch to protect local IPv4 addresses hash. 2021-10-22 14:40:53 -07:00
if_ether.h
igmp.c Remove in_ifaddr_lock acquisiton to access in_ifaddrhead. 2021-10-13 10:04:46 -07:00
igmp.h
igmp_var.h igmp: convert igmpstat to use PCPU counters 2020-11-08 18:49:23 +00:00
in.c kernel: partially revert e9efb1125a15, default inet mask 2021-11-14 14:12:25 -06:00
in.h Add in_localip_fib(), in6_localip_fib(). 2021-11-12 08:59:42 -08:00
in_cksum.c netinet: Implement in_cksum_skip() using m_apply() 2021-11-24 13:31:16 -05:00
in_debug.c Use network epoch to protect local IPv4 addresses hash. 2021-10-22 14:40:53 -07:00
in_fib.c Fix some common typos in comments 2021-08-08 10:16:06 +02:00
in_fib.h Refactor fib4/fib6 functions. 2020-11-29 13:41:49 +00:00
in_fib_algo.c Fix IPv4 fib bsearch4() lookup array construction. 2021-01-17 20:32:26 +00:00
in_fib_dxr.c [fib_algo][dxr] Retire counters which are no longer used 2021-10-09 13:47:10 +02:00
in_gif.c Use network epoch to protect local IPv4 addresses hash. 2021-10-22 14:40:53 -07:00
in_jail.c
in_kdtrace.c Separate out SCTP related dtrace code. 2019-10-14 20:32:11 +00:00
in_kdtrace.h Separate out SCTP related dtrace code. 2019-10-14 20:32:11 +00:00
in_mcast.c Use network epoch to protect local IPv4 addresses hash. 2021-10-22 14:40:53 -07:00
in_pcb.c tcp_hpts: rename input queue to drop queue and trim dead code 2021-12-02 10:48:48 -08:00
in_pcb.h tcp_hpts: rewrite inpcb synchronization 2021-12-02 10:48:49 -08:00
in_pcb_var.h SMR protection for inpcbs 2021-12-02 10:48:48 -08:00
in_prot.c
in_proto.c capsicum: Limit socket operations in capability mode 2021-04-07 14:32:56 -04:00
in_rmx.c Refactor rib iterator functions. 2020-11-22 20:21:10 +00:00
in_rss.c Remove "options PCBGROUP" 2021-12-02 10:48:48 -08:00
in_rss.h Implement flowid calculation for outbound connections to balance 2020-10-18 17:15:47 +00:00
in_systm.h
in_var.h Use network epoch to protect local IPv4 addresses hash. 2021-10-22 14:40:53 -07:00
ip.h
ip6.h net: Introduce IPV6_DSCP(), IPV6_ECN() and IPV6_TRAFFIC_CLASS() macros 2021-03-04 20:56:48 +01:00
ip_carp.c carp: deal with negative net.inet.carp.demotion 2021-11-01 17:08:23 +01:00
ip_carp.h carp: replace caddr_t with char * 2019-12-06 16:35:48 +00:00
ip_divert.c SMR protection for inpcbs 2021-12-02 10:48:48 -08:00
ip_divert.h
ip_dummynet.h ipfw: use unsigned int for dummynet bandwidth 2021-08-19 10:48:53 +02:00
ip_ecn.c
ip_ecn.h
ip_encap.c Widen NET_EPOCH coverage. 2019-10-07 22:40:05 +00:00
ip_encap.h
ip_fastfwd.c routing: Allow using IPv6 next-hops for IPv4 routes (RFC 5549). 2021-08-22 22:56:08 +00:00
ip_fw.h Allow setting alias port ranges in libalias and ipfw. This will allow a system 2021-02-02 13:24:17 -08:00
ip_gre.c SMR protection for inpcbs 2021-12-02 10:48:48 -08:00
ip_icmp.c Use network epoch to protect local IPv4 addresses hash. 2021-10-22 14:40:53 -07:00
ip_icmp.h
ip_id.c Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many) 2020-02-26 14:26:36 +00:00
ip_input.c Add net.inet.ip.source_address_validation 2021-11-12 09:00:33 -08:00
ip_mroute.c mroute: add missing WUNLOCK 2021-10-28 07:12:23 +02:00
ip_mroute.h ip_mroute: rework ip_mroute 2021-05-31 05:48:15 +02:00
ip_options.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
ip_options.h
ip_output.c netinet: Remove unneeded mb_unmapped_to_ext() calls 2021-11-24 13:31:16 -05:00
ip_reass.c ip_reass: do less work in ipreass_slowtimo if possible 2021-08-14 18:50:12 +02:00
ip_var.h An earlier commit effectively turned out the fast forwading path 2020-11-12 21:58:47 +00:00
pim.h
pim_var.h
raw_ip.c SMR protection for inpcbs 2021-12-02 10:48:48 -08:00
sctp.h Improve the handling of cookie life times. 2020-10-16 10:44:48 +00:00
sctp_asconf.c sctp: cleanup, no functional change intended 2021-09-15 10:18:11 +02:00
sctp_asconf.h net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
sctp_auth.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
sctp_auth.h net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
sctp_bsd_addr.c Don't pass RFPROC to kproc_create(), it is redundant. 2021-03-12 09:48:10 -08:00
sctp_bsd_addr.h net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
sctp_cc_functions.c sctp: remove some set, but unused variables 2021-08-09 15:58:46 +02:00
sctp_constants.h sctp: Fix errno in case of association setup failures 2021-07-09 23:19:25 +02:00
sctp_crc32.c sctp: Use m_apply() to calcuate a checksum for an mbuf chain 2021-11-16 13:36:30 -05:00
sctp_crc32.h Add the SCTP_SUPPORT kernel option. 2020-06-18 19:32:34 +00:00
sctp_header.h Whitespace changes. 2020-09-24 12:26:06 +00:00
sctp_indata.c sctp: Fix errno in case of association setup failures 2021-07-09 23:19:25 +02:00
sctp_indata.h net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
sctp_input.c sctp: improve consistency, no functional change intended 2021-11-26 12:53:43 +01:00
sctp_input.h net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
sctp_kdtrace.c Separate out SCTP related dtrace code. 2019-10-14 20:32:11 +00:00
sctp_kdtrace.h Separate out SCTP related dtrace code. 2019-10-14 20:32:11 +00:00
sctp_lock_bsd.h sctp: Simplify stream scheduler usage 2021-09-21 17:13:57 +02:00
sctp_module.c Provide support for building SCTP as a loadable module. 2020-07-10 14:56:05 +00:00
sctp_os.h net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
sctp_os_bsd.h net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
sctp_output.c sctp: improve consistency, no functional change intended 2021-11-26 12:53:43 +01:00
sctp_output.h Whitespace changes. 2020-09-24 12:26:06 +00:00
sctp_pcb.c sctp: improve consistency, no functional change intended 2021-11-26 12:53:43 +01:00
sctp_pcb.h sctp: Tighten up locking around sctp_aloc_assoc() 2021-09-11 10:15:21 -04:00
sctp_peeloff.c sctp: Remove an unused sctp_inpcb field 2021-09-07 11:19:29 -04:00
sctp_peeloff.h
sctp_ss_functions.c sctp: improve KASSERT messages 2021-10-08 11:33:56 +02:00
sctp_structs.h sctp: Cleanup stream schedulers. 2021-09-23 14:16:56 +02:00
sctp_syscalls.c Convert remaining cap_rights_init users to cap_rights_init_one 2021-01-12 13:16:10 +00:00
sctp_sysctl.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
sctp_sysctl.h Improve the handling of cookie life times. 2020-10-16 10:44:48 +00:00
sctp_timer.c sctp: avoid locking an already locked mutex 2021-09-28 05:17:03 +02:00
sctp_timer.h net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
sctp_uio.h net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
sctp_usrreq.c sctp: improve handling of assoc ids in socket options 2021-12-01 14:54:55 +01:00
sctp_var.h net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
sctputil.c sctp: improve consistency, no functional change intended 2021-11-26 12:53:43 +01:00
sctputil.h sctp: Fix errno in case of association setup failures 2021-07-09 23:19:25 +02:00
siftr.c SIFTR: Fix compilation with -DSIFTR_IPV6 2021-11-04 00:32:17 +00:00
tcp.h tcp: socket option to get stack alias name 2021-10-27 08:21:59 -07:00
tcp_accounting.h This brings into sync FreeBSD with the netflix versions of rack and bbr. 2021-05-06 11:22:26 -04:00
tcp_debug.c
tcp_debug.h inet: remove tcp_debug from netinet/tcp_debug.h 2021-11-01 23:10:30 +00:00
tcp_fastopen.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
tcp_fastopen.h
tcp_fsm.h tcp: Remove unused v6 state definitions 2021-08-27 08:31:32 -04:00
tcp_hostcache.c tcp(4): Fix a typo in a sysctl description 2021-11-30 07:17:30 +01:00
tcp_hpts.c tcp_hpts: rewrite inpcb synchronization 2021-12-02 10:48:49 -08:00
tcp_hpts.h tcp_hpts: rewrite inpcb synchronization 2021-12-02 10:48:49 -08:00
tcp_input.c SMR protection for inpcbs 2021-12-02 10:48:48 -08:00
tcp_log_buf.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
tcp_log_buf.h tcp: Add hystart-plus to cc_newreno and rack. 2021-10-22 07:10:28 -04:00
tcp_lro.c tcp_hpts: rename input queue to drop queue and trim dead code 2021-12-02 10:48:48 -08:00
tcp_lro.h Update the TCP LRO code to handle both encrypted and un-encrypted traffic. 2021-08-06 11:28:44 +02:00
tcp_offload.c Path MTU discovery hooks for offloaded TCP connections. 2021-04-21 13:00:16 -07:00
tcp_offload.h Path MTU discovery hooks for offloaded TCP connections. 2021-04-21 13:00:16 -07:00
tcp_output.c tcp: Preparation for allowing hardware TLS to be able to kick a tcp connection that is retransmitting too much out of hardware and back to software. 2021-06-25 09:30:54 -04:00
tcp_pcap.c Step 4.2: start divorce of M_EXT and M_EXTPG 2020-05-03 00:37:16 +00:00
tcp_pcap.h
tcp_ratelimit.c Add a switch structure for send tags. 2021-09-14 11:43:41 -07:00
tcp_ratelimit.h This takes Warners suggested approach to making it so that 2021-05-07 17:32:32 -04:00
tcp_reass.c tcp: A better fix for the previously attempted fix of the ack-war issue with tcp. 2021-06-04 05:26:43 -04:00
tcp_sack.c tcp: Make dsack stats available in netstat and also make sure its aware of TLP's. 2021-10-01 10:36:27 -04:00
tcp_seq.h
tcp_stats.c Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many) 2020-02-26 14:26:36 +00:00
tcp_subr.c tcp_hpts: rewrite inpcb synchronization 2021-12-02 10:48:49 -08:00
tcp_syncache.c inpcb: reduce some aliased functions after removal of PCBGROUP. 2021-12-02 10:48:48 -08:00
tcp_syncache.h tcp: add support for TCP over UDP 2021-04-18 16:16:42 +02:00
tcp_timer.c Add tcp_freecb() - single place to free tcpcb. 2021-11-18 20:27:45 -08:00
tcp_timer.h Add tcp_freecb() - single place to free tcpcb. 2021-11-18 20:27:45 -08:00
tcp_timewait.c tcp_hpts: rewrite inpcb synchronization 2021-12-02 10:48:49 -08:00
tcp_usrreq.c tcp_usr_detach: revert debugging piece from f5cf1e5f5a. 2021-11-13 08:33:32 -08:00
tcp_var.h SMR protection for inpcbs 2021-12-02 10:48:48 -08:00
tcpip.h
toecore.c routing: Allow using IPv6 next-hops for IPv4 routes (RFC 5549). 2021-08-22 22:56:08 +00:00
toecore.h Path MTU discovery hooks for offloaded TCP connections. 2021-04-21 13:00:16 -07:00
udp.h White space cleanup -- remove trailing tab's or spaces 2020-02-12 13:31:36 +00:00
udp_usrreq.c SMR protection for inpcbs 2021-12-02 10:48:48 -08:00
udp_var.h SMR protection for inpcbs 2021-12-02 10:48:48 -08:00
udplite.h White space cleanup -- remove trailing tab's or spaces 2020-02-12 13:31:36 +00:00