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89856f7e2d
freebsd-skq/sys/netinet
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Bjoern A. Zeeb 89856f7e2d Get closer to a VIMAGE network stack teardown from top to bottom rather 
than removing the network interfaces first. This change is rather larger
and convoluted as the ordering requirements cannot be separated.

Move the pfil(9) framework to SI_SUB_PROTO_PFIL, move Firewalls and
related modules to their own SI_SUB_PROTO_FIREWALL.
Move initialization of "physical" interfaces to SI_SUB_DRIVERS,
move virtual (cloned) interfaces to SI_SUB_PSEUDO.
Move Multicast to SI_SUB_PROTO_MC.

Re-work parts of multicast initialisation and teardown, not taking the
huge amount of memory into account if used as a module yet.

For interface teardown we try to do as many of them as we can on
SI_SUB_INIT_IF, but for some this makes no sense, e.g., when tunnelling
over a higher layer protocol such as IP. In that case the interface
has to go along (or before) the higher layer protocol is shutdown.

Kernel hhooks need to go last on teardown as they may be used at various
higher layers and we cannot remove them before we cleaned up the higher
layers.

For interface teardown there are multiple paths:
(a) a cloned interface is destroyed (inside a VIMAGE or in the base system),
(b) any interface is moved from a virtual network stack to a different
network stack ("vmove"), or (c) a virtual network stack is being shut down.
All code paths go through if_detach_internal() where we, depending on the
vmove flag or the vnet state, make a decision on how much to shut down;
in case we are destroying a VNET the individual protocol layers will
cleanup their own parts thus we cannot do so again for each interface as
we end up with, e.g., double-frees, destroying locks twice or acquiring
already destroyed locks.
When calling into protocol cleanups we equally have to tell them
whether they need to detach upper layer protocols ("ulp") or not
(e.g., in6_ifdetach()).

Provide or enahnce helper functions to do proper cleanup at a protocol
rather than at an interface level.

Approved by:		re (hrs)
Obtained from:		projects/vnet
Reviewed by:		gnn, jhb
Sponsored by:		The FreeBSD Foundation
MFC after:		2 weeks
Differential Revision:	https://reviews.freebsd.org/D6747
2016-06-21 13:48:49 +00:00
..
cc Add an option to use rfc6675 based pipe/inflight bytes calculation in htcp. 2016-05-09 19:19:03 +00:00
khelp
libalias sys/net*: minor spelling fixes. 2016-05-03 18:05:43 +00:00
tcp_stacks Cleanup unneded include "opt_ipfw.h". 2016-06-09 05:48:34 +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 Introduce a per-VNET flag to enable/disable netisr prcessing on that VNET. 2016-06-03 13:57:10 +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 Get closer to a VIMAGE network stack teardown from top to bottom rather 2016-06-21 13:48:49 +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_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 This change re-adds L2 caching for TCP and UDP, as originally added in D4306 2016-06-02 17:51:29 +00:00
in_pcb.h sys/net*: minor spelling fixes. 2016-05-03 18:05:43 +00:00
in_pcbgroup.c Unbreak the RSS/PCBGROUp build. 2016-03-31 00:53:23 +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
in_var.h Get closer to a VIMAGE network stack teardown from top to bottom rather 2016-06-21 13:48:49 +00:00
in.c Get closer to a VIMAGE network stack teardown from top to bottom rather 2016-06-21 13:48:49 +00:00
in.h
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 Make named objects set-aware. Now it is possible to create named 2016-05-17 07:47:23 +00:00
ip_gre.c
ip_icmp.c When sending in ICMP response to an SCTP packet, 2016-05-25 22:16:11 +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 Get closer to a VIMAGE network stack teardown from top to bottom rather 2016-06-21 13:48:49 +00:00
ip_input.c Get closer to a VIMAGE network stack teardown from top to bottom rather 2016-06-21 13:48:49 +00:00
ip_ipsec.c Set the proper direction to check for policies in this one case. 2015-10-29 21:26:32 +00:00
ip_ipsec.h
ip_mroute.c Get closer to a VIMAGE network stack teardown from top to bottom rather 2016-06-21 13:48:49 +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 Cleanup unneded include "opt_ipfw.h". 2016-06-09 05:48:34 +00:00
ip_reass.c
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 The pr_destroy field does not allow us to run the teardown code in a 2016-06-01 10:14:04 +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 Use __func__ instead of __FUNCTION__. 2015-10-19 11:17:54 +00:00
sctp_auth.h
sctp_bsd_addr.c netinet/sctp*: minor spelling fixes in comments. 2016-05-02 20:56:11 +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 netinet/sctp*: minor spelling fixes in comments. 2016-05-02 20:56:11 +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 Don't use anonymous unions. 2016-04-18 06:38:53 +00:00
sctp_indata.c Fix a locking bug which only shows up on Mac OS X. 2016-05-14 13:44:49 +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 Use a separate MID counter for ordered und unordered messages for each 2016-06-08 17:57:42 +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 Use a separate MID counter for ordered und unordered messages for each 2016-06-08 17:57:42 +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 net: Use M_HASHTYPE_OPAQUE_HASH if the mbuf flowid has hash properties 2016-06-07 04:51:50 +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 Add const to several constants. Thanks to Nicholas Nethercote for 2016-03-23 13:28:04 +00:00
sctp_structs.h Use a separate MID counter for ordered und unordered messages for each 2016-06-08 17:57:42 +00:00
sctp_syscalls.c netinet: for pointers replace 0 with NULL. 2016-04-15 15:46:41 +00:00
sctp_sysctl.c Retire net.inet.sctp.strict_sacks and net.inet.sctp.strict_data_order 2016-05-12 16:34:59 +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 Make struct sctp_paddrthlds compliant to RFC 7829. 2016-05-26 11:38:26 +00:00
sctp_usrreq.c The pr_destroy field does not allow us to run the teardown code in a 2016-06-01 10:14:04 +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 Use a separate MID counter for ordered und unordered messages for each 2016-06-08 17:57:42 +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
tcp_debug.h
tcp_fastopen.c Mfp: r296259 2016-04-09 10:58:08 +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
tcp_hostcache.c Clean up unused bandwidth entry in the TCP hostcache. 2015-12-11 06:22:58 +00:00
tcp_hostcache.h Clean up unused bandwidth entry in the TCP hostcache. 2015-12-11 06:22:58 +00:00
tcp_input.c Cleanup unneded include "opt_ipfw.h". 2016-06-09 05:48:34 +00:00
tcp_lro.c Use insertion sort instead of bubble sort in TCP LRO. 2016-06-03 08:35:07 +00:00
tcp_lro.h Use optimised complexity safe sorting routine instead of the kernel's 2016-05-26 11:10:31 +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 tcp: Don't prematurely drop receiving-only connections 2016-05-30 03:31:37 +00:00
tcp_pcap.c Garbage collect unused arguments of m_init(). 2016-02-10 18:54:18 +00:00
tcp_pcap.h There are times when it would be really nice to have a record of the last few 2015-10-14 00:35:37 +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
tcp_subr.c The pr_destroy field does not allow us to run the teardown code in a 2016-06-01 10:14:04 +00:00
tcp_syncache.c tcp/syncache: Add comment for syncache_respond 2016-05-10 04:59:04 +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 This small change adopts the excellent suggestion for using named 2016-05-17 09:53:22 +00:00
tcp_timer.h This cleans up the timers code in TCP to start using the new 2016-04-28 13:27:12 +00:00
tcp_timewait.c Redo r294869. The array of counters for TCP states doesn't belong to 2016-03-15 00:15:10 +00:00
tcp_usrreq.c tcp_usrreq: Free allocated buffer in relock case 2016-04-26 23:02:18 +00:00
tcp_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
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 Cleanup unneded include "opt_ipfw.h". 2016-06-09 05:48:34 +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