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79bdc6e5d3
freebsd-dev/sys/netinet
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Robert Watson 79bdc6e5d3 Continue to refine inpcb reference counting and locking, in preparation for 
reworking of inpcbinfo locking:

(1) Convert inpcb reference counting from manually manipulated integers to
    the refcount(9) KPI.  This allows the refcount to be managed atomically
    with an inpcb read lock rather than write lock, or even with no inpcb
    lock at all.  As a result, in_pcbref() also no longer requires an inpcb
    lock, so can be performed solely using the lock used to look up an
    inpcb.

(2) Shift more inpcb freeing activity from the in_pcbrele() context (via
    in_pcbfree_internal) to the explicit in_pcbfree() context.  This means
    that the inpcb refcount is increasingly used only to maintain memory
    stability, not actually defer the clean up of inpcb protocol parts.
    This is desirable as many of those protocol parts required the pcbinfo
    lock, which we'd like not to acquire in in_pcbrele() contexts.  Document
    this in comments better.

(3) Introduce new read-locked and write-locked in_pcbrele() variations,
    in_pcbrele_rlocked() and in_pcbrele_wlocked(), which allow the inpcb to
    be properly unlocked as needed.  in_pcbrele() is a wrapper around the
    latter, and should probably go away at some point.  This makes it
    easier to use this weak reference model when holding only a read lock,
    as will happen in the future.

This may well be safe to MFC, but some more KBI analysis is required.

Reviewed by:    bz
MFC after:      3 weeks
Sponsored by:   Juniper Networks, Inc.
2011-05-23 19:32:02 +00:00
..
cc Staticize malloc types. 2011-04-13 11:28:46 +00:00
ipfw Convert delay parameter back to ms when reporting to user. 2011-05-06 07:13:34 +00:00
khelp Use the full and proper company name for Swinburne University of Technology 2011-04-12 08:13:18 +00:00
libalias LibAliasInit() should allocate memory with M_WAITOK flag. Modify it 2011-04-18 20:07:08 +00:00
accf_data.c
accf_dns.c
accf_http.c
cc.h Use the full and proper company name for Swinburne University of Technology 2011-04-12 08:13:18 +00:00
icmp6.h
icmp_var.h
if_atm.c Bring back (most of) NATM to avoid further bitrot after r186119. 2010-12-15 22:58:45 +00:00
if_atm.h
if_ether.c - Merge changes to the base system to support OFED. These include 2011-03-21 09:40:01 +00:00
if_ether.h
igmp_var.h
igmp.c After some off-list discussion, revert a number of changes to the 2010-11-22 19:32:54 +00:00
igmp.h
in_cksum.c
in_debug.c Add initial inet DDB support for show in_ifaddr and show sin commands which 2010-10-24 22:02:36 +00:00
in_gif.c
in_gif.h
in_mcast.c
in_pcb.c Continue to refine inpcb reference counting and locking, in preparation for 2011-05-23 19:32:02 +00:00
in_pcb.h Continue to refine inpcb reference counting and locking, in preparation for 2011-05-23 19:32:02 +00:00
in_proto.c Be less strict on includes than in r220746. We need in.h for both 2011-04-25 16:36:16 +00:00
in_rmx.c After some off-list discussion, revert a number of changes to the 2010-11-22 19:32:54 +00:00
in_systm.h
in_var.h The statically configured (permanent) ARP entries are removed when an 2011-05-20 19:12:20 +00:00
in.c The statically configured (permanent) ARP entries are removed when an 2011-05-20 19:12:20 +00:00
in.h Make the RPC specific __rpc_inet_ntop() and __rpc_inet_pton() general 2010-09-24 15:01:45 +00:00
ip6.h Fix more continuous/contiguous typos (cf. r215955) 2010-11-27 21:51:39 +00:00
ip_carp.c Make various (pseudo) interfaces compile without INET in the kernel 2011-04-27 19:30:44 +00:00
ip_carp.h Unbreak LINT by moving all carp hooks to net/if.c / netinet/ip_carp.h, with 2010-08-11 20:18:19 +00:00
ip_divert.c Specify a CTLTYPE_FOO so that a future sysctl(8) change does not need 2011-01-18 21:14:13 +00:00
ip_divert.h
ip_dummynet.h
ip_ecn.c
ip_ecn.h
ip_encap.c
ip_encap.h
ip_fastfwd.c Use correct field to track statistics counting error as bad header length. 2010-12-05 01:09:48 +00:00
ip_fw.h - Rewrite functions that copyin/out NAT configuration, so that they 2011-04-19 15:06:33 +00:00
ip_gre.c
ip_gre.h
ip_icmp.c MfP4 CH=192029: 2011-04-27 19:36:35 +00:00
ip_icmp.h
ip_id.c
ip_input.c MfP4 CH=192004: 2011-04-27 19:32:27 +00:00
ip_ipsec.c After some off-list discussion, revert a number of changes to the 2010-11-22 19:32:54 +00:00
ip_ipsec.h
ip_mroute.c After some off-list discussion, revert a number of changes to the 2010-11-22 19:32:54 +00:00
ip_mroute.h
ip_options.c Use ifa_ifwithaddr_check() rather than ifa_ifwithaddr() as we are not 2010-10-14 12:32:49 +00:00
ip_options.h
ip_output.c The mbuf_frag_size always was and is file local and not queried from base 2011-04-14 09:47:09 +00:00
ip_var.h MFp4 CH=191470: 2011-04-20 08:00:29 +00:00
ip.h
pim_var.h
pim.h
raw_ip.c The statically configured (permanent) ARP entries are removed when an 2011-05-20 19:12:20 +00:00
sctp_asconf.c Remove code with any effect. 2011-05-03 20:34:02 +00:00
sctp_asconf.h 1) Typo correction in comments and one spacing change. 2011-02-05 12:12:51 +00:00
sctp_auth.c Fix a locking issue showing up on Mac OS X when subscribing to 2011-05-08 09:11:59 +00:00
sctp_auth.h Fix a locking issue showing up on Mac OS X when subscribing to 2011-05-08 09:11:59 +00:00
sctp_bsd_addr.c Improve compilation of SCTP code without INET support. 2011-04-30 11:18:16 +00:00
sctp_bsd_addr.h 1) Typo correction in comments and one spacing change. 2011-02-05 12:12:51 +00:00
sctp_cc_functions.c Implement Resource Pooling V2 and an MPTCP like congestion 2011-05-04 21:27:05 +00:00
sctp_constants.h Tunes and fixes the new DC-CC to seem to hit the 2011-03-08 11:58:25 +00:00
sctp_crc32.c 1) Typo correction in comments and one spacing change. 2011-02-05 12:12:51 +00:00
sctp_crc32.h 1) Typo correction in comments and one spacing change. 2011-02-05 12:12:51 +00:00
sctp_dtrace_declare.h Tunes and fixes the new DC-CC to seem to hit the 2011-03-08 11:58:25 +00:00
sctp_dtrace_define.h Tunes and fixes the new DC-CC to seem to hit the 2011-03-08 11:58:25 +00:00
sctp_header.h 1) Typo correction in comments and one spacing change. 2011-02-05 12:12:51 +00:00
sctp_indata.c Fix a locking issue showing up on Mac OS X when subscribing to 2011-05-08 09:11:59 +00:00
sctp_indata.h 1) Typo correction in comments and one spacing change. 2011-02-05 12:12:51 +00:00
sctp_input.c Fix a locking issue showing up on Mac OS X when subscribing to 2011-05-08 09:11:59 +00:00
sctp_input.h Fix a locking issue showing up on Mac OS X when subscribing to 2011-05-08 09:11:59 +00:00
sctp_lock_bsd.h 1) Typo correction in comments and one spacing change. 2011-02-05 12:12:51 +00:00
sctp_os_bsd.h Remove some leftover debug code. 2011-04-30 11:22:30 +00:00
sctp_os.h 1) Typo correction in comments and one spacing change. 2011-02-05 12:12:51 +00:00
sctp_output.c Unbreak INET-less build. 2011-05-18 19:49:39 +00:00
sctp_output.h Fix the source address selection for boundall sockets 2011-05-14 18:22:14 +00:00
sctp_pcb.c Fix a locking issue showing up on Mac OS X when subscribing to 2011-05-08 09:11:59 +00:00
sctp_pcb.h 1) Typo correction in comments and one spacing change. 2011-02-05 12:12:51 +00:00
sctp_peeloff.c Mfp4 CH=177274,177280,177284-177285,177297,177324-177325 2011-02-16 21:29:13 +00:00
sctp_peeloff.h 1) Typo correction in comments and one spacing change. 2011-02-05 12:12:51 +00:00
sctp_ss_functions.c Fix several bugs related to stream scheduling. 2011-02-13 13:53:28 +00:00
sctp_structs.h Tunes and fixes the new DC-CC to seem to hit the 2011-03-08 11:58:25 +00:00
sctp_sysctl.c Improve compilation of SCTP code without INET support. 2011-04-30 11:18:16 +00:00
sctp_sysctl.h Implement Resource Pooling V2 and an MPTCP like congestion 2011-05-04 21:27:05 +00:00
sctp_timer.c Fix a locking issue showing up on Mac OS X when subscribing to 2011-05-08 09:11:59 +00:00
sctp_timer.h 1) Typo correction in comments and one spacing change. 2011-02-05 12:12:51 +00:00
sctp_uio.h Improvements to CC modules: 2011-02-26 15:23:46 +00:00
sctp_usrreq.c Copy out the mtu when calling getsockopt() with SCTP_GET_PEER_ADDR_INFO. 2011-05-17 15:57:31 +00:00
sctp_var.h Fix a locking issue showing up on Mac OS X when subscribing to 2011-05-08 09:11:59 +00:00
sctp.h Implement Resource Pooling V2 and an MPTCP like congestion 2011-05-04 21:27:05 +00:00
sctputil.c Fix a locking issue showing up on Mac OS X when subscribing to 2011-05-08 09:11:59 +00:00
sctputil.h Some more cleanups related to an kernel without INET. 2011-05-02 15:53:00 +00:00
siftr.c Staticize malloc types. 2011-04-13 11:28:46 +00:00
tcp_debug.c
tcp_debug.h
tcp_fsm.h
tcp_hostcache.c sysctl(9) cleanup checkpoint: amd64 GENERIC builds cleanly. 2011-01-12 19:53:50 +00:00
tcp_hostcache.h
tcp_input.c Oops, fix order of sequence numbers in KASSERT()'s to catch negative 2011-05-14 14:41:40 +00:00
tcp_lro.c Port of the LRO fix from mxge driver to the generic 2011-04-07 21:20:26 +00:00
tcp_lro.h Trim extra spaces before tabs. 2011-01-07 21:40:34 +00:00
tcp_offload.c
tcp_offload.h Fix typos - remove duplicate "the". 2011-02-21 09:01:34 +00:00
tcp_output.c Handle a rare edge case with nearly full TCP receive buffers. If a TCP 2011-05-02 21:05:52 +00:00
tcp_reass.c Specify a CTLTYPE_FOO so that a future sysctl(8) change does not need 2011-01-18 21:14:13 +00:00
tcp_sack.c Covers values if (BYTES_THIS_ACK(tp, th) / tp->t_maxseg) value is from 2011-03-28 19:03:56 +00:00
tcp_seq.h
tcp_subr.c Refactor TCP ISN increment logic. Instead of firing callout at 100Hz to 2011-05-09 07:37:47 +00:00
tcp_syncache.c Make the TCP code compile without INET. Sort #includes and add #ifdef INETs. 2011-04-30 11:21:29 +00:00
tcp_syncache.h Trim extra spaces before tabs. 2011-01-07 21:40:34 +00:00
tcp_timer.c TCP reuses t_rxtshift to determine the backoff timer used for both the 2011-04-29 15:40:12 +00:00
tcp_timer.h Remove the TCP inflight bandwidth limiter as announced in r211315 2010-09-16 21:06:45 +00:00
tcp_timewait.c Oops, fix order of sequence numbers in KASSERT()'s to catch negative 2011-05-14 14:41:40 +00:00
tcp_usrreq.c Make the TCP code compile without INET. Sort #includes and add #ifdef INETs. 2011-04-30 11:21:29 +00:00
tcp_var.h TCP reuses t_rxtshift to determine the backoff timer used for both the 2011-04-29 15:40:12 +00:00
tcp.h Add new, per connection, statistics for TCP, including: 2010-11-17 18:55:12 +00:00
tcpip.h
toedev.h
udp_usrreq.c Make the UDP code compile without INET. Expose udp_usrreq.c to IPv6 only 2011-04-30 11:17:00 +00:00
udp_var.h Trim extra spaces before tabs. 2011-01-07 21:40:34 +00:00
udp.h Trim extra spaces before tabs. 2011-01-07 21:40:34 +00:00