#
5e29dc36 |
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30-Dec-2022 |
Jozsef Kadlecsik <kadlec@netfilter.org> |
netfilter: ipset: Rework long task execution when adding/deleting entries When adding/deleting large number of elements in one step in ipset, it can take a reasonable amount of time and can result in soft lockup errors. The patch 5f7b51bf09ba ("netfilter: ipset: Limit the maximal range of consecutive elements to add/delete") tried to fix it by limiting the max elements to process at all. However it was not enough, it is still possible that we get hung tasks. Lowering the limit is not reasonable, so the approach in this patch is as follows: rely on the method used at resizing sets and save the state when we reach a smaller internal batch limit, unlock/lock and proceed from the saved state. Thus we can avoid long continuous tasks and at the same time removed the limit to add/delete large number of elements in one step. The nfnl mutex is held during the whole operation which prevents one to issue other ipset commands in parallel. Fixes: 5f7b51bf09ba ("netfilter: ipset: Limit the maximal range of consecutive elements to add/delete") Reported-by: syzbot+9204e7399656300bf271@syzkaller.appspotmail.com Signed-off-by: Jozsef Kadlecsik <kadlec@netfilter.org> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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#
e9374524 |
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22-Nov-2022 |
Vishwanath Pai <vpai@akamai.com> |
netfilter: ipset: Add support for new bitmask parameter Add a new parameter to complement the existing 'netmask' option. The main difference between netmask and bitmask is that bitmask takes any arbitrary ip address as input, it does not have to be a valid netmask. The name of the new parameter is 'bitmask'. This lets us mask out arbitrary bits in the ip address, for example: ipset create set1 hash:ip bitmask 255.128.255.0 ipset create set2 hash:ip,port family inet6 bitmask ffff::ff80 Signed-off-by: Vishwanath Pai <vpai@akamai.com> Signed-off-by: Joshua Hunt <johunt@akamai.com> Signed-off-by: Jozsef Kadlecsik <kadlec@netfilter.org> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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#
5f7b51bf |
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28-Jul-2021 |
Jozsef Kadlecsik <kadlec@netfilter.org> |
netfilter: ipset: Limit the maximal range of consecutive elements to add/delete The range size of consecutive elements were not limited. Thus one could define a huge range which may result soft lockup errors due to the long execution time. Now the range size is limited to 2^20 entries. Reported-by: Brad Spengler <spender@grsecurity.net> Signed-off-by: Jozsef Kadlecsik <kadlec@netfilter.org> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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#
3976ca10 |
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29-Oct-2020 |
Jozsef Kadlecsik <kadlec@netfilter.org> |
netfilter: ipset: Expose the initval hash parameter to userspace It makes possible to reproduce exactly the same set after a save/restore. Signed-off-by: Jozsef Kadlecsik <kadlec@netfilter.org> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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#
ccf0a4b7 |
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29-Oct-2020 |
Jozsef Kadlecsik <kadlec@netfilter.org> |
netfilter: ipset: Add bucketsize parameter to all hash types The parameter defines the upper limit in any hash bucket at adding new entries from userspace - if the limit would be exceeded, ipset doubles the hash size and rehashes. It means the set may consume more memory but gives faster evaluation at matching in the set. Signed-off-by: Jozsef Kadlecsik <kadlec@netfilter.org> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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#
12899756 |
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01-Nov-2019 |
Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> |
netfilter: ipset: Fix nla_policies to fully support NL_VALIDATE_STRICT Since v5.2 (commit "netlink: re-add parse/validate functions in strict mode") NL_VALIDATE_STRICT is enabled. Fix the ipset nla_policies which did not support strict mode and convert from deprecated parsings to verified ones. Signed-off-by: Jozsef Kadlecsik <kadlec@netfilter.org>
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#
8dea982a |
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03-Oct-2019 |
Jeremy Sowden <jeremy@azazel.net> |
netfilter: ipset: remove inline from static functions in .c files. The inline function-specifier should not be used for static functions defined in .c files since it bloats the kernel. Instead leave the compiler to decide which functions to inline. While a couple of the files affected (ip_set_*_gen.h) are technically headers, they contain templates for generating the common parts of particular set-types and so we treat them like .c files. Signed-off-by: Jeremy Sowden <jeremy@azazel.net> Acked-by: Jozsef Kadlecsik <kadlec@netfilter.org> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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#
d2912cb1 |
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04-Jun-2019 |
Thomas Gleixner <tglx@linutronix.de> |
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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#
fe03d474 |
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10-Jun-2019 |
Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> |
Update my email address It's better to use my kadlec@netfilter.org email address in the source code. I might not be able to use kadlec@blackhole.kfki.hu in the future. Signed-off-by: Jozsef Kadlecsik <kadlec@netfilter.org> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
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#
0b8d9073 |
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12-Jan-2018 |
Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> |
netfilter: ipset: Fix wraparound in hash:*net* types Fix wraparound bug which could lead to memory exhaustion when adding an x.x.x.x-255.255.255.255 range to any hash:*net* types. Fixes Netfilter's bugzilla id #1212, reported by Thomas Schwark. Fixes: 48596a8ddc46 ("netfilter: ipset: Fix adding an IPv4 range containing more than 2^31 addresses") Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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#
48596a8d |
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23-Sep-2017 |
Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> |
netfilter: ipset: Fix adding an IPv4 range containing more than 2^31 addresses Wrong comparison prevented the hash types to add a range with more than 2^31 addresses but reported as a success. Fixes Netfilter's bugzilla id #1005, reported by Oleg Serditov and Oliver Ford. Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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#
21956ab2 |
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26-Jun-2015 |
Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> |
netfilter: ipset: Make struct htype per ipset family Before this patch struct htype created at the first source of ip_set_hash_gen.h and it is common for both IPv4 and IPv6 set variants. Make struct htype per ipset family and use NLEN to make nets array fixed size to simplify struct htype allocation. Ported from a patch proposed by Sergey Popovich <popovich_sergei@mail.ua>. Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
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#
96be5f28 |
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21-Aug-2015 |
Elad Raz <eladr@mellanox.com> |
netfilter: ipset: Fixing unnamed union init In continue to proposed Vinson Lee's post [1], this patch fixes compilation issues founded at gcc 4.4.7. The initialization of .cidr field of unnamed unions causes compilation error in gcc 4.4.x. References Visible links [1] https://lkml.org/lkml/2015/7/5/74 Signed-off-by: Elad Raz <eladr@mellanox.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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#
ca0f6a5c |
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13-Jun-2015 |
Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> |
netfilter: ipset: Fix coding styles reported by checkpatch.pl Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
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#
18f84d41 |
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13-Jun-2015 |
Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> |
netfilter: ipset: Introduce RCU locking in hash:* types Three types of data need to be protected in the case of the hash types: a. The hash buckets: standard rcu pointer operations are used. b. The element blobs in the hash buckets are stored in an array and a bitmap is used for book-keeping to tell which elements in the array are used or free. c. Networks per cidr values and the cidr values themselves are stored in fix sized arrays and need no protection. The values are modified in such an order that in the worst case an element testing is repeated once with the same cidr value. The ipset hash approach uses arrays instead of lists and therefore is incompatible with rhashtable. Performance is tested by Jesper Dangaard Brouer: Simple drop in FORWARD ~~~~~~~~~~~~~~~~~~~~~~ Dropping via simple iptables net-mask match:: iptables -t raw -N simple || iptables -t raw -F simple iptables -t raw -I simple -s 198.18.0.0/15 -j DROP iptables -t raw -D PREROUTING -j simple iptables -t raw -I PREROUTING -j simple Drop performance in "raw": 11.3Mpps Generator: sending 12.2Mpps (tx:12264083 pps) Drop via original ipset in RAW table ~~~~~~~~~~~~~~~~~~~~~~~~~~~ Create a set with lots of elements:: sudo ./ipset destroy test echo "create test hash:ip hashsize 65536" > test.set for x in `seq 0 255`; do for y in `seq 0 255`; do echo "add test 198.18.$x.$y" >> test.set done done sudo ./ipset restore < test.set Dropping via ipset:: iptables -t raw -F iptables -t raw -N net198 || iptables -t raw -F net198 iptables -t raw -I net198 -m set --match-set test src -j DROP iptables -t raw -I PREROUTING -j net198 Drop performance in "raw" with ipset: 8Mpps Perf report numbers ipset drop in "raw":: + 24.65% ksoftirqd/1 [ip_set] [k] ip_set_test - 21.42% ksoftirqd/1 [kernel.kallsyms] [k] _raw_read_lock_bh - _raw_read_lock_bh + 99.88% ip_set_test - 19.42% ksoftirqd/1 [kernel.kallsyms] [k] _raw_read_unlock_bh - _raw_read_unlock_bh + 99.72% ip_set_test + 4.31% ksoftirqd/1 [ip_set_hash_ip] [k] hash_ip4_kadt + 2.27% ksoftirqd/1 [ixgbe] [k] ixgbe_fetch_rx_buffer + 2.18% ksoftirqd/1 [ip_tables] [k] ipt_do_table + 1.81% ksoftirqd/1 [ip_set_hash_ip] [k] hash_ip4_test + 1.61% ksoftirqd/1 [kernel.kallsyms] [k] __netif_receive_skb_core + 1.44% ksoftirqd/1 [kernel.kallsyms] [k] build_skb + 1.42% ksoftirqd/1 [kernel.kallsyms] [k] ip_rcv + 1.36% ksoftirqd/1 [kernel.kallsyms] [k] __local_bh_enable_ip + 1.16% ksoftirqd/1 [kernel.kallsyms] [k] dev_gro_receive + 1.09% ksoftirqd/1 [kernel.kallsyms] [k] __rcu_read_unlock + 0.96% ksoftirqd/1 [ixgbe] [k] ixgbe_clean_rx_irq + 0.95% ksoftirqd/1 [kernel.kallsyms] [k] __netdev_alloc_frag + 0.88% ksoftirqd/1 [kernel.kallsyms] [k] kmem_cache_alloc + 0.87% ksoftirqd/1 [xt_set] [k] set_match_v3 + 0.85% ksoftirqd/1 [kernel.kallsyms] [k] inet_gro_receive + 0.83% ksoftirqd/1 [kernel.kallsyms] [k] nf_iterate + 0.76% ksoftirqd/1 [kernel.kallsyms] [k] put_compound_page + 0.75% ksoftirqd/1 [kernel.kallsyms] [k] __rcu_read_lock Drop via ipset in RAW table with RCU-locking ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ With RCU locking, the RW-lock is gone. Drop performance in "raw" with ipset with RCU-locking: 11.3Mpps Performance-tested-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
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#
f690cbae |
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12-Jun-2015 |
Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> |
netfilter: ipset: Fix cidr handling for hash:*net* types Commit "Simplify cidr handling for hash:*net* types" broke the cidr handling for the hash:*net* types when the sets were used by the SET target: entries with invalid cidr values were added to the sets. Reported by Jonathan Johnson. Testsuite entry is added to verify the fix. Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
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#
aff22758 |
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12-Jun-2015 |
Sergey Popovich <popovich_sergei@mail.ua> |
netfilter: ipset: Check CIDR value only when attribute is given There is no reason to check CIDR value regardless attribute specifying CIDR is given. Initialize cidr array in element structure on element structure declaration to let more freedom to the compiler to optimize initialization right before element structure is used. Remove local variables cidr and cidr2 for netnet and netportnet hashes as we do not use packed cidr value for such set types and can store value directly in e.cidr[]. Signed-off-by: Sergey Popovich <popovich_sergei@mail.ua> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
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#
a212e08e |
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12-Jun-2015 |
Sergey Popovich <popovich_sergei@mail.ua> |
netfilter: ipset: Make sure we always return line number on batch Even if we return with generic IPSET_ERR_PROTOCOL it is good idea to return line number if we called in batch mode. Moreover we are not always exiting with IPSET_ERR_PROTOCOL. For example hash:ip,port,net may return IPSET_ERR_HASH_RANGE_UNSUPPORTED or IPSET_ERR_INVALID_CIDR. Signed-off-by: Sergey Popovich <popovich_sergei@mail.ua> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
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#
7dd37bc8 |
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12-Jun-2015 |
Sergey Popovich <popovich_sergei@mail.ua> |
netfilter: ipset: Check extensions attributes before getting extensions. Make all extensions attributes checks within ip_set_get_extensions() and reduce number of duplicated code. Signed-off-by: Sergey Popovich <popovich_sergei@mail.ua> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
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#
03726186 |
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02-May-2015 |
Sergey Popovich <popovich_sergei@mail.ua> |
netfilter: ipset: Check for comment netlink attribute length Ensure userspace supplies string not longer than IPSET_MAX_COMMENT_SIZE. Signed-off-by: Sergey Popovich <popovich_sergei@mail.ua> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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#
8e55d2e5 |
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02-May-2015 |
Sergey Popovich <popovich_sergei@mail.ua> |
netfilter: ipset: Return ipset error instead of bool Statement ret = func1() || func2() returns 0 when both func1() and func2() return 0, or 1 if func1() or func2() returns non-zero. However in our case func1() and func2() returns error code on failure, so it seems good to propagate such error codes, rather than returning 1 in case of failure. Signed-off-by: Sergey Popovich <popovich_sergei@mail.ua> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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#
43ef29c9 |
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02-May-2015 |
Sergey Popovich <popovich_sergei@mail.ua> |
netfilter: ipset: Preprocessor directices cleanup * Undefine mtype_data_reset_elem before defining. * Remove duplicated mtype_gc_init undefine, move mtype_gc_init define closer to mtype_gc define. * Use htype instead of HTYPE in IPSET_TOKEN(HTYPE, _create)(). * Remove PF definition from sets: no more used. Signed-off-by: Sergey Popovich <popovich_sergei@mail.ua> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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#
cac37639 |
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30-Nov-2014 |
Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> |
netfilter: ipset: Explicitly add padding elements to hash:net, net and hash:net, port, net The elements must be u32 sized for the used hash function. Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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#
af331419 |
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28-Aug-2014 |
Anton Danilov <littlesmilingcloud@gmail.com> |
netfilter: ipset: Add skbinfo extension kernel support for the hash set types. Add skbinfo extension kernel support for the hash set types. Inroduce the new revisions of all hash set types. Signed-off-by: Anton Danilov <littlesmilingcloud@gmail.com> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
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#
6e41ee68 |
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05-May-2014 |
Sergey Popovich <popovich_sergei@mail.ru> |
netfilter: ipset: netnet,netportnet: Fix value range support for IPv4 Ranges of values are broken with hash:net,net and hash:net,port,net. hash:net,net ============ # ipset create test-nn hash:net,net # ipset add test-nn 10.0.10.1-10.0.10.127,10.0.0.0/8 # ipset list test-nn Name: test-nn Type: hash:net,net Revision: 0 Header: family inet hashsize 1024 maxelem 65536 Size in memory: 16960 References: 0 Members: 10.0.10.1,10.0.0.0/8 # ipset test test-nn 10.0.10.65,10.0.0.1 10.0.10.65,10.0.0.1 is NOT in set test-nn. # ipset test test-nn 10.0.10.1,10.0.0.1 10.0.10.1,10.0.0.1 is in set test-nn. hash:net,port,net ================= # ipset create test-npn hash:net,port,net # ipset add test-npn 10.0.10.1-10.0.10.127,tcp:80,10.0.0.0/8 # ipset list test-npn Name: test-npn Type: hash:net,port,net Revision: 0 Header: family inet hashsize 1024 maxelem 65536 Size in memory: 17344 References: 0 Members: 10.0.10.8/29,tcp:80,10.0.0.0 10.0.10.16/28,tcp:80,10.0.0.0 10.0.10.2/31,tcp:80,10.0.0.0 10.0.10.64/26,tcp:80,10.0.0.0 10.0.10.32/27,tcp:80,10.0.0.0 10.0.10.4/30,tcp:80,10.0.0.0 10.0.10.1,tcp:80,10.0.0.0 # ipset list test-npn # ipset test test-npn 10.0.10.126,tcp:80,10.0.0.2 10.0.10.126,tcp:80,10.0.0.2 is NOT in set test-npn. # ipset test test-npn 10.0.10.126,tcp:80,10.0.0.0 10.0.10.126,tcp:80,10.0.0.0 is in set test-npn. # ipset create test-npn hash:net,port,net # ipset add test-npn 10.0.10.0/24,tcp:80-81,10.0.0.0/8 # ipset list test-npn Name: test-npn Type: hash:net,port,net Revision: 0 Header: family inet hashsize 1024 maxelem 65536 Size in memory: 17024 References: 0 Members: 10.0.10.0,tcp:80,10.0.0.0 10.0.10.0,tcp:81,10.0.0.0 # ipset test test-npn 10.0.10.126,tcp:80,10.0.0.0 10.0.10.126,tcp:80,10.0.0.0 is NOT in set test-npn. # ipset test test-npn 10.0.10.0,tcp:80,10.0.0.0 10.0.10.0,tcp:80,10.0.0.0 is in set test-npn. Correctly setup from..to variables where no IPSET_ATTR_IP_TO{,2} attribute is given, so in range processing loop we construct proper cidr value. Check whenever we have no ranges and can short cut in hash:net,net properly. Use unlikely() where appropriate, to comply with other modules. Signed-off-by: Sergey Popovich <popovich_sergei@mail.ru> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
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#
07cf8f5a |
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28-Feb-2014 |
Josh Hunt <johunt@akamai.com> |
netfilter: ipset: add forceadd kernel support for hash set types Adds a new property for hash set types, where if a set is created with the 'forceadd' option and the set becomes full the next addition to the set may succeed and evict a random entry from the set. To keep overhead low eviction is done very simply. It checks to see which bucket the new entry would be added. If the bucket's pos value is non-zero (meaning there's at least one entry in the bucket) it replaces the first entry in the bucket. If pos is zero, then it continues down the normal add process. This property is useful if you have a set for 'ban' lists where it may not matter if you release some entries from the set early. Signed-off-by: Josh Hunt <johunt@akamai.com> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
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#
9562cf28 |
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27-Dec-2013 |
Fengguang Wu <fengguang.wu@intel.com> |
netfilter: ipset: Add hash: fix coccinelle warnings net/netfilter/ipset/ip_set_hash_netnet.c:115:8-9: WARNING: return of 0/1 in function 'hash_netnet4_data_list' with return type bool /c/kernel-tests/src/cocci/net/netfilter/ipset/ip_set_hash_netnet.c:338:8-9: WARNING: return of 0/1 in function 'hash_netnet6_data_list' with return type bool Return statements in functions returning bool should use true/false instead of 1/0. Generated by: coccinelle/misc/boolreturn.cocci Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
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#
b49faea7 |
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14-Nov-2013 |
Dave Jones <davej@redhat.com> |
netfilter: ipset: fix incorret comparison in hash_netnet4_data_equal() Both sides of the comparison are the same, looks like a cut-and-paste error. Spotted by Coverity. Signed-off-by: Dave Jones <davej@fedoraproject.org> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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#
1a869205 |
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18-Oct-2013 |
Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> |
netfilter: ipset: The unnamed union initialization may lead to compilation error The unnamed union should be possible to be initialized directly, but unfortunately it's not so: /usr/src/ipset/kernel/net/netfilter/ipset/ip_set_hash_netnet.c: In function ?hash_netnet4_kadt?: /usr/src/ipset/kernel/net/netfilter/ipset/ip_set_hash_netnet.c:141: error: unknown field ?cidr? specified in initializer Reported-by: Husnu Demir <hdemir@metu.edu.tr> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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#
fda75c6d |
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22-Sep-2013 |
Oliver Smith <oliver@8.c.9.b.0.7.4.0.1.0.0.2.ip6.arpa> |
netfilter: ipset: Support comments in hash-type ipsets. This provides kernel support for creating ipsets with comment support. This does incur a penalty to flushing/destroying an ipset since all entries are walked in order to free the allocated strings, this penalty is of course less expensive than the operation of listing an ipset to userspace, so for general-purpose usage the overall impact is expected to be little to none. Signed-off-by: Oliver Smith <oliver@8.c.9.b.0.7.4.0.1.0.0.2.ip6.arpa> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
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#
ea53ac5b |
|
20-Sep-2013 |
Oliver Smith <oliver@8.c.9.b.0.7.4.0.1.0.0.2.ip6.arpa> |
netfilter: ipset: Add hash:net,net module to kernel. This adds a new set that provides the ability to configure pairs of subnets. A small amount of additional handling code has been added to the generic hash header file - this code is conditionally activated by a preprocessor definition. Signed-off-by: Oliver Smith <oliver@8.c.9.b.0.7.4.0.1.0.0.2.ip6.arpa> Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
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