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80210b69e0
freebsd-skq/sys/netinet6
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ae a312c1bedf Fix deadlock in IPv6 PCB code. 
When several threads are trying to send datagram to the same destination,
but fragmentation is disabled and datagram size exceeds link MTU,
ip6_output() calls pfctlinput2(PRC_MSGSIZE). It does notify all
sockets wanted to know MTU to this destination. And since all threads
hold PCB lock while sending, taking the lock for each PCB in the
in6_pcbnotify() leads to deadlock.

RFC 3542 p.11.3 suggests notify all application wanted to receive
IPV6_PATHMTU ancillary data for each ICMPv6 packet too big message.
But it doesn't require this, when we don't receive ICMPv6 message.

Change ip6_notify_pmtu() function to be able use it directly from
ip6_output() to notify only one socket, and to notify all sockets
when ICMPv6 packet too big message received.

PR:		197059
Differential Revision:	https://reviews.freebsd.org/D1949
Reviewed by:	no objection from #network
Obtained from:	Yandex LLC
MFC after:	1 week
Sponsored by:	Yandex LLC
2015-03-04 11:20:01 +00:00
..
dest6.c The r48589 promised to remove implicit inclusion of if_var.h soon. Prepare 2013-10-26 17:58:36 +00:00
frag6.c Move ip6_deletefraghdr() to frag6.c. 2015-02-16 05:58:32 +00:00
icmp6.c Remove unneded check. No need to do m_pullup to the size that we prepended. 2014-12-02 05:41:03 +00:00
icmp6.h
in6_cksum.c Fix the checksum computation for UDPLite/IPv6. This requires the 2014-10-02 10:32:24 +00:00
in6_gif.c Extern declarations in C files loses compile-time checking that 2014-12-25 21:32:37 +00:00
in6_ifattach.c Consistently use if_link. 2014-11-10 15:56:30 +00:00
in6_ifattach.h Use FF02:0:0:0:0:2:FF00::/104 prefix for IPv6 Node Information Group 2013-05-04 19:16:26 +00:00
in6_mcast.c Use new struct mbufq instead of struct ifqueue to manage packet queues in 2015-02-19 01:21:23 +00:00
in6_pcb.c Fix deadlock in IPv6 PCB code. 2015-03-04 11:20:01 +00:00
in6_pcb.h Make in6_pcblookup_hash_locked and in6_pcbladdr static. 2014-09-10 13:17:35 +00:00
in6_pcbgroup.c Refactor / restructure the RSS code into generic, IPv4 and IPv6 specific 2015-01-18 18:06:40 +00:00
in6_proto.c Renove faith(4) and faithd(8) from base. It looks like industry 2014-11-09 21:33:01 +00:00
in6_rmx.c Kill custom in_matroute() radix mathing function removing one rte mutex lock. 2014-11-11 02:52:40 +00:00
in6_rss.c Refactor / restructure the RSS code into generic, IPv4 and IPv6 specific 2015-01-18 18:06:40 +00:00
in6_rss.h Refactor / restructure the RSS code into generic, IPv4 and IPv6 specific 2015-01-18 18:06:40 +00:00
in6_src.c For now handle only multicast addresses, we still use routes to 2014-11-10 10:59:08 +00:00
in6_var.h Now that all users of _WANT_IFADDR are fixed, remove this crutch and 2015-02-19 23:16:10 +00:00
in6.c This fixes a bug in the way that the LLE timers for nd6 2015-02-09 19:28:11 +00:00
in6.h Kill custom in_matroute() radix mathing function removing one rte mutex lock. 2014-11-11 02:52:40 +00:00
ip6_ecn.h
ip6_forward.c Use ipsec6_in_reject() to simplify ip6_ipsec_fwd() and ip6_ipsec_input(). 2014-12-11 19:09:57 +00:00
ip6_gre.c Extern declarations in C files loses compile-time checking that 2014-12-25 21:32:37 +00:00
ip6_id.c Provide includes that are needed in these files, and before were read 2013-10-26 18:18:50 +00:00
ip6_input.c Fix deadlock in IPv6 PCB code. 2015-03-04 11:20:01 +00:00
ip6_ipsec.c Use ipsec6_in_reject() to simplify ip6_ipsec_fwd() and ip6_ipsec_input(). 2014-12-11 19:09:57 +00:00
ip6_ipsec.h Remove flag/flags argument from the following functions: 2014-12-11 18:35:34 +00:00
ip6_mroute.c When deciding whether to call m_pullup() even though there is adequate 2014-10-12 15:49:52 +00:00
ip6_mroute.h revert part of r260485 which changes how part of the header gets 2014-01-09 22:41:18 +00:00
ip6_output.c Fix deadlock in IPv6 PCB code. 2015-03-04 11:20:01 +00:00
ip6_var.h Fix deadlock in IPv6 PCB code. 2015-03-04 11:20:01 +00:00
ip6.h
ip6protosw.h Merge 'struct ip6protosw' and 'struct protosw' into one. Now we have 2014-08-08 01:57:15 +00:00
mld6_var.h - Rename 'struct mld_ifinfo' into 'struct mld_ifsoftc', since it really 2015-02-19 22:37:01 +00:00
mld6.c - Rename 'struct mld_ifinfo' into 'struct mld_ifsoftc', since it really 2015-02-19 22:37:01 +00:00
mld6.h
nd6_nbr.c Create nd6_ns_output_fib() function with extra argument fibnum. Use it 2015-03-03 10:50:03 +00:00
nd6_rtr.c Use in6_localip() instead of hand-rolled cycle. 2014-01-18 20:54:55 +00:00
nd6.c Implement Enhanced DAD algorithm for IPv6 described in 2015-03-02 17:30:26 +00:00
nd6.h Implement Enhanced DAD algorithm for IPv6 described in 2015-03-02 17:30:26 +00:00
pim6_var.h Remove more constants related to static sysctl nodes. The MAXID constants 2014-02-25 18:44:33 +00:00
pim6.h
raw_ip6.c Do not count security policy violation twice. 2014-12-11 19:20:13 +00:00
raw_ip6.h Migrate structs ip6stat, icmp6stat and rip6stat to PCPU counters. 2013-07-09 09:54:54 +00:00
route6.c The r48589 promised to remove implicit inclusion of if_var.h soon. Prepare 2013-10-26 17:58:36 +00:00
scope6_var.h Add sa6_checkzone_ifp() function. It checks correctness of struct 2014-11-10 16:12:51 +00:00
scope6.c Add sa6_checkzone_ifp() function. It checks correctness of struct 2014-11-10 16:12:51 +00:00
sctp6_usrreq.c Minimize the usage of SCTP_BUF_IS_EXTENDED. 2015-01-10 20:49:57 +00:00
sctp6_var.h
send.c Free mbuf in case of error. 2013-12-17 10:53:17 +00:00
send.h
tcp6_var.h
udp6_usrreq.c Refactor / restructure the RSS code into generic, IPv4 and IPv6 specific 2015-01-18 18:06:40 +00:00
udp6_var.h Add support for UDP-Lite protocol (RFC 3828) to IPv4 and IPv6 stacks. 2014-04-07 01:53:03 +00:00