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opnsense-src/sys/netinet6
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Mark Johnston bcc7e68fcf nd6: Make the DAD callout MPSAFE 
Interface addresses with pending duplicate address detection (DAD) live
in a global queue.  In this case, a callout is associated with each
entry.  The callout transmits neighbour solicitations until the system
decides the address is no longer tentative, or until a duplicate address
is discovered.  At this point the entry is dequeued and freed.  DAD may
be manually stopped as well.

The callout currently runs (and potentially transmits packets) with
Giant held.  Reorganize DAD queue locking to interlock properly with the
callout:

- Configure the callout to acquire the DAD queue lock before running.
  The lock is dropped before transmitting any packets.  Stop protecting
  the callout with Giant.
- When looking up DAD queue entries for an incoming NS or NA, don't
  bother fiddling with the DAD queue entry reference count.
- Split nd6_dad_starttimer() so that the caller is responsible to
  transmitting a NS if it so desires.
- Remove the DAD entry from the queue before stopping the timer.  Use a
  temporary reference to make sure that the entry doesn't get freed by
  the callout while we're draining.

Reported by:	mav
Reviewed by:	bz, hrs
Sponsored by:	The FreeBSD Foundation

(cherry picked from commit 9a94097cd0)
2021-09-21 09:37:52 -04:00
..
dest6.c Fix m_pullup() problem after removing PULLDOWN_TESTs and KAME EXT_*macros. 2019-12-01 00:22:04 +00:00
frag6.c frag6: do less work in frag6_slowtimo if possible 2021-08-18 09:44:45 +00:00
icmp6.c lltable: Add support for "child" LLEs holding encap for IPv4oIPv6 entries. 2021-09-07 21:02:58 +00:00
icmp6.h
in6.c lltable: fix crash introduced in c541bd368f. 2021-09-07 21:02:58 +00:00
in6.h Expose nonstandard IPv6 kernel definitions to standalone builds. 2020-12-04 21:51:47 +00:00
in6_cksum.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
in6_fib.c MFC 91f2c69ec2: Fix unused-function waring when compiling with FIB_ALGO. 2021-02-04 22:33:53 +00:00
in6_fib.h Add modular fib lookup framework. 2020-12-25 11:33:17 +00:00
in6_fib_algo.c Fix dpdk/ldradix fib lookup algorithm preference calculation. 2021-03-10 21:50:19 +00:00
in6_gif.c net: Introduce IPV6_DSCP(), IPV6_ECN() and IPV6_TRAFFIC_CLASS() macros 2021-05-10 16:30:44 +02:00
in6_ifattach.c in6: Enter the net epoch in in6_tmpaddrtimer() 2021-08-16 09:01:39 -04:00
in6_ifattach.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
in6_jail.c Move most of the contents of opt_compat.h to opt_global.h. 2018-04-06 17:35:35 +00:00
in6_mcast.c Fix panic in IPv6 multicast code. 2021-08-13 10:31:11 +03:00
in6_pcb.c Add missing sockaddr length and family validation to various protocols 2021-05-17 13:43:07 -04:00
in6_pcb.h Filter TCP connections to SO_REUSEPORT_LB listen sockets by NUMA domain 2020-12-19 22:04:46 +00:00
in6_pcbgroup.c sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00
in6_proto.c Remove unused nhop_ref_any() function. 2020-09-20 21:32:52 +00:00
in6_rmx.c Introduce scalable route multipath. 2020-10-03 10:47:17 +00:00
in6_rss.c Implement flowid calculation for outbound connections to balance 2020-10-18 17:15:47 +00:00
in6_rss.h Implement flowid calculation for outbound connections to balance 2020-10-18 17:15:47 +00:00
in6_src.c Enforce net epoch in in6_selectsrc(). 2021-03-10 21:57:59 +00:00
in6_var.h Remove per-packet ifa refcounting from IPv6 fast path. 2021-03-10 21:45:55 +00:00
ip6.h
ip6_ecn.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
ip6_fastfwd.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
ip6_forward.c ipv6: quit dropping packets looping back on p2p interfaces 2020-08-31 01:45:48 +00:00
ip6_gre.c Introduce NET_EPOCH_CALL() macro and use it everywhere where we free 2020-01-15 06:05:20 +00:00
ip6_id.c ip6_randomflowlabel: Avoid blocking if random(4) is not available 2019-04-23 17:18:20 +00:00
ip6_input.c socket: Implement SO_RERROR 2021-08-10 18:54:00 -07:00
ip6_mroute.c ip6mrouter: Make the expiration callout MPSAFE 2021-09-21 09:37:32 -04:00
ip6_mroute.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
ip6_output.c net: Introduce IPV6_DSCP(), IPV6_ECN() and IPV6_TRAFFIC_CLASS() macros 2021-05-10 16:30:44 +02:00
ip6_var.h Convert route caching to nexthop caching. 2020-04-25 09:06:11 +00:00
ip6protosw.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
ip_fw_nat64.h Reapply r345274 with build fixes for 32-bit architectures. 2019-03-19 10:57:03 +00:00
ip_fw_nptv6.h net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
mld6.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
mld6.h sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00
mld6_var.h icmpv6: Fix mbuf change in mld 2019-11-18 21:59:47 +00:00
nd6.c lltable: Add support for "child" LLEs holding encap for IPv4oIPv6 entries. 2021-09-07 21:02:58 +00:00
nd6.h lltable: Add support for "child" LLEs holding encap for IPv4oIPv6 entries. 2021-09-07 21:02:58 +00:00
nd6_nbr.c nd6: Make the DAD callout MPSAFE 2021-09-21 09:37:52 -04:00
nd6_rtr.c lltable: fix crash introduced in c541bd368f. 2021-09-07 21:02:58 +00:00
pim6.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
pim6_var.h Rework IP encapsulation handling code. 2018-06-05 20:51:01 +00:00
raw_ip6.c socket: Implement SO_RERROR 2021-08-10 18:54:00 -07:00
raw_ip6.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
route6.c Fix m_pullup() problem after removing PULLDOWN_TESTs and KAME EXT_*macros. 2019-12-01 00:22:04 +00:00
scope6.c net: clean up empty lines in .c and .h files 2020-09-01 21:19:14 +00:00
scope6_var.h Make net.inet6.ip6.deembed_scopeid behaviour default & remove sysctl. 2020-08-15 11:37:44 +00:00
sctp6_usrreq.c sctp: Fix errno in case of association setup failures 2021-07-13 20:30:57 +02:00
sctp6_var.h Whitespace changes due to changes in ident. 2018-07-19 20:16:33 +00:00
send.c socket: Implement SO_RERROR 2021-08-10 18:54:00 -07:00
send.h sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00
tcp6_var.h mend 2021-06-07 11:01:28 +02:00
udp6_usrreq.c socket: Implement SO_RERROR 2021-08-10 18:54:00 -07:00
udp6_var.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00