This is a backport of a 5.1rc patchset: https://patchwork.ozlabs.org/cover/1029418/
Which was backported into 4.19: https://patchwork.ozlabs.org/cover/1081619/
and into 4.14: https://patchwork.ozlabs.org/cover/1089651/
This 4.9 patchset is very close to the 4.14 patchset above (cherry-picks from 4.14 were almost clean).
Eric Dumazet (1): ipv6: frags: fix a lockdep false positive
Florian Westphal (1): ipv6: remove dependency of nf_defrag_ipv6 on ipv6 module
Peter Oskolkov (3): net: IP defrag: encapsulate rbtree defrag code into callable functions net: IP6 defrag: use rbtrees for IPv6 defrag net: IP6 defrag: use rbtrees in nf_conntrack_reasm.c
include/net/inet_frag.h | 16 +- include/net/ipv6.h | 29 -- include/net/ipv6_frag.h | 111 +++++++ net/ieee802154/6lowpan/reassembly.c | 2 +- net/ipv4/inet_fragment.c | 293 ++++++++++++++++++ net/ipv4/ip_fragment.c | 295 +++--------------- net/ipv6/netfilter/nf_conntrack_reasm.c | 273 +++++----------- net/ipv6/netfilter/nf_defrag_ipv6_hooks.c | 3 +- net/ipv6/reassembly.c | 361 ++++++---------------- net/openvswitch/conntrack.c | 1 + 10 files changed, 631 insertions(+), 753 deletions(-) create mode 100644 include/net/ipv6_frag.h