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* esp4: Add support for IPsec extended sequence numbersSteffen Klassert2011-03-141-18/+82
| | | | | | | | | | This patch adds IPsec extended sequence numbers support to esp4. We use the authencesn crypto algorithm to handle esp with separate encryption/authentication algorithms. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* xfrm: Use separate low and high order bits of the sequence numbers in ↵Steffen Klassert2011-03-141-2/+2
| | | | | | | | | | | | | xfrm_skb_cb To support IPsec extended sequence numbers, we split the output sequence numbers of xfrm_skb_cb in low and high order 32 bits and we add the high order 32 bits to the input sequence numbers. All users are updated accordingly. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* xfrm: Traffic Flow Confidentiality for IPv4 ESPMartin Willi2010-12-101-8/+24
| | | | | | | | | | Add TFC padding to all packets smaller than the boundary configured on the xfrm state. If the boundary is larger than the PMTU, limit padding to the PMTU. Signed-off-by: Martin Willi <martin@strongswan.org> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* xfrm: SA lookups signature with markJamal Hadi Salim2010-02-231-1/+1
| | | | | | | | pass mark to all SA lookups to prepare them for when we add code to have them search. Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
* xfrm: Use the user specified truncation length in ESP and AHMartin Willi2009-11-261-1/+1
| | | | | | | | Instead of using the hardcoded truncation for authentication algorithms, use the truncation length specified on xfrm_state. Signed-off-by: Martin Willi <martin@strongswan.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: constify struct net_protocolAlexey Dobriyan2009-09-151-1/+1
| | | | | | | Remove long removed "inet_protocol_base" declaration. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netns xfrm: AH/ESP in netns!Alexey Dobriyan2008-11-261-1/+3
| | | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* netns xfrm: state lookup in netnsAlexey Dobriyan2008-11-261-1/+1
| | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: clean up net/ipv4/ah4.c esp4.c fib_semantics.c inet_connection_sock.c ↵Jianjun Kong2008-11-031-2/+2
| | | | | | | inetpeer.c ip_output.c Signed-off-by: Jianjun Kong <jianjun@zeuux.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* ipsec: Interfamily IPSec BEETJoakim Koskela2008-08-061-1/+1
| | | | | | | | | | | Here's a revised version, based on Herbert's comments, of a fix for the ipv6-inner, ipv4-outer interfamily ipsec beet mode. It fixes the network header adjustment in interfamily, and doesn't reserve space for the pseudo header anymore when we have ipv6 as the inner family. Signed-off-by: Joakim Koskela <jookos@gmail.com> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* [ESP]: Ensure IV is in linear part of the skb to avoid BUG() due to OOB accessThomas Graf2008-03-281-1/+1
| | | | | | | | | | | | | ESP does not account for the IV size when calling pskb_may_pull() to ensure everything it accesses directly is within the linear part of a potential fragment. This results in a BUG() being triggered when the both the IPv4 and IPv6 ESP stack is fed with an skb where the first fragment ends between the end of the esp header and the end of the IV. This bug was found by Dirk Nehring <dnehring@gmx.net> . Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV4]: esp_output() misannotationsAl Viro2008-03-181-1/+1
| | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPSEC]: Fix bogus usage of u64 on input sequence numberHerbert Xu2008-02-131-2/+3
| | | | | | | | | Al Viro spotted a bogus use of u64 on the input sequence number which is big-endian. This patch fixes it by giving the input sequence number its own member in the xfrm_skb_cb structure. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* [XFRM]: constify 'struct xfrm_type'Eric Dumazet2008-02-011-1/+1
| | | | | Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPSEC]: Add support for combined mode algorithmsHerbert Xu2008-02-011-13/+58
| | | | | | | | | | | | | | | | This patch adds support for combined mode algorithms with GCM being the first algorithm supported. Combined mode algorithms can be added through the xfrm_user interface using the new algorithm payload type XFRMA_ALG_AEAD. Each algorithms is identified by its name and the ICV length. For the purposes of matching algorithms in xfrm_tmpl structures, combined mode algorithms occupy the same name space as encryption algorithms. This is in line with how they are negotiated using IKE. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPSEC]: Use crypto_aead and authenc in ESPHerbert Xu2008-02-011-195/+302
| | | | | | | | | This patch converts ESP to use the crypto_aead interface and in particular the authenc algorithm. This lays the foundations for future support of combined mode algorithms. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPSEC]: Move all calls to xfrm_audit_state_icvfail to xfrm_inputHerbert Xu2008-01-291-1/+0
| | | | | | | Let's nip the code duplication in the bud :) Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* [XFRM]: RFC4303 compliant auditingPaul Moore2008-01-291-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds a number of new IPsec audit events to meet the auditing requirements of RFC4303. This includes audit hooks for the following events: * Could not find a valid SA [sections 2.1, 3.4.2] . xfrm_audit_state_notfound() . xfrm_audit_state_notfound_simple() * Sequence number overflow [section 3.3.3] . xfrm_audit_state_replay_overflow() * Replayed packet [section 3.4.3] . xfrm_audit_state_replay() * Integrity check failure [sections 3.4.4.1, 3.4.4.2] . xfrm_audit_state_icvfail() While RFC4304 deals only with ESP most of the changes in this patch apply to IPsec in general, i.e. both AH and ESP. The one case, integrity check failure, where ESP specific code had to be modified the same was done to the AH code for the sake of consistency. Signed-off-by: Paul Moore <paul.moore@hp.com> Acked-by: James Morris <jmorris@namei.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPSEC]: Move state lock into x->type->inputHerbert Xu2008-01-281-9/+15
| | | | | | | | | | | | This patch releases the lock on the state before calling x->type->input. It also adds the lock to the spots where they're currently needed. Most of those places (all except mip6) are expected to disappear with async crypto. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPSEC]: Move integrity stat collection into xfrm_inputHerbert Xu2008-01-281-5/+8
| | | | | | | | | | | | | | | | Similar to the moving out of the replay processing on the output, this patch moves the integrity stat collectin from x->type->input into xfrm_input. This would eventually allow transforms such as AH/ESP to be lockless. The error value EBADMSG (currently unused in the crypto layer) is used to indicate a failed integrity check. In future this error can be directly returned by the crypto layer once we switch to aead algorithms. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPv4] ESP: Discard dummy packets introduced in rfc4303Thomas Graf2007-12-111-0/+5
| | | | | | | | | | RFC4303 introduces dummy packets with a nexthdr value of 59 to implement traffic confidentiality. Such packets need to be dropped silently and the payload may not be attempted to be parsed as it consists of random chunk. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: Fix incorrect sg_mark_end() calls.David S. Miller2007-10-311-5/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This fixes scatterlist corruptions added by commit 68e3f5dd4db62619fdbe520d36c9ebf62e672256 [CRYPTO] users: Fix up scatterlist conversion errors The issue is that the code calls sg_mark_end() which clobbers the sg_page() pointer of the final scatterlist entry. The first part fo the fix makes skb_to_sgvec() do __sg_mark_end(). After considering all skb_to_sgvec() call sites the most correct solution is to call __sg_mark_end() in skb_to_sgvec() since that is what all of the callers would end up doing anyways. I suspect this might have fixed some problems in virtio_net which is the sole non-crypto user of skb_to_sgvec(). Other similar sg_mark_end() cases were converted over to __sg_mark_end() as well. Arguably sg_mark_end() is a poorly named function because it doesn't just "mark", it clears out the page pointer as a side effect, which is what led to these bugs in the first place. The one remaining plain sg_mark_end() call is in scsi_alloc_sgtable() and arguably it could be converted to __sg_mark_end() if only so that we can delete this confusing interface from linux/scatterlist.h Signed-off-by: David S. Miller <davem@davemloft.net>
* [CRYPTO] users: Fix up scatterlist conversion errorsHerbert Xu2007-10-271-2/+5
| | | | | | | | | This patch fixes the errors made in the users of the crypto layer during the sg_init_table conversion. It also adds a few conversions that were missing altogether. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* [INET] ESP: Must #include <linux/scatterlist.h>Adrian Bunk2007-10-271-1/+1
| | | | | | | | | | | | | | | | | | | | | | This patch fixes the following compile errors in some configurations: <-- snip --> ... CC net/ipv4/esp4.o /home/bunk/linux/kernel-2.6/git/linux-2.6/net/ipv4/esp4.c: In function 'esp_output': /home/bunk/linux/kernel-2.6/git/linux-2.6/net/ipv4/esp4.c:113: error: implicit declaration of function 'sg_init_table' make[3]: *** [net/ipv4/esp4.o] Error 1 ... /home/bunk/linux/kernel-2.6/git/linux-2.6/net/ipv6/esp6.c: In function 'esp6_output': /home/bunk/linux/kernel-2.6/git/linux-2.6/net/ipv6/esp6.c:112: error: implicit declaration of function 'sg_init_table' make[3]: *** [net/ipv6/esp6.o] Error 1 <-- snip --> Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPSEC]: Add missing sg_init_table() calls to ESP.David S. Miller2007-10-261-0/+2
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPSEC]: Move IP protocol setting from transforms into xfrm4_input.cHerbert Xu2007-10-111-2/+1
| | | | | | | | | This patch makes the IPv4 x->type->input functions return the next protocol instead of setting it directly. This is identical to how we do things in IPv6 and will help us merge common code on the input path. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPSEC]: Move IP length/checksum setting out of transformsHerbert Xu2007-10-111-6/+1
| | | | | | | | | | | | This patch moves the setting of the IP length and checksum fields out of the transforms and into the xfrmX_output functions. This would help future efforts in merging the transforms themselves. It also adds an optimisation to ipcomp due to the fact that the transport offset is guaranteed to be zero. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPSEC]: Get rid of ipv6_{auth,esp,comp}_hdrHerbert Xu2007-10-111-5/+5
| | | | | | | | | | | | | This patch removes the duplicate ipv6_{auth,esp,comp}_hdr structures since they're identical to the IPv4 versions. Duplicating them would only create problems for ourselves later when we need to add things like extended sequence numbers. I've also added transport header type conversion headers for these types which are now used by the transforms. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPSEC]: Use IPv6 calling convention as the convention for x->mode->outputHerbert Xu2007-10-111-6/+5
| | | | | | | | | | | | | The IPv6 calling convention for x->mode->output is more general and could help an eventual protocol-generic x->type->output implementation. This patch adopts it for IPv4 as well and modifies the IPv4 type output functions accordingly. It also rewrites the IPv6 mac/transport header calculation to be based off the network header where practical. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPSEC]: Set skb->data to payload in x->mode->outputHerbert Xu2007-10-111-4/+2
| | | | | | | | | | | | | | | | This patch changes the calling convention so that on entry from x->mode->output and before entry into x->type->output skb->data will point to the payload instead of the IP header. This is essentially a redistribution of skb_push/skb_pull calls with the aim of minimising them on the common path of tunnel + ESP. It'll also let us use the same calling convention between IPv4 and IPv6 with the next patch. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPSEC] esp: Remove NAT-T checksum invalidation for BEETHerbert Xu2007-10-111-2/+1
| | | | | | | | | | | | I pointed this out back when this patch was first proposed but it looks like it got lost along the way. The checksum only needs to be ignored for NAT-T in transport mode where we lose the original inner addresses due to NAT. With BEET the inner addresses will be intact so the checksum remains valid. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPSEC]: Move state lock into x->type->outputHerbert Xu2007-10-111-2/+8
| | | | | | | | | | | This patch releases the lock on the state before calling x->type->output. It also adds the lock to the spots where they're currently needed. Most of those places (all except mip6) are expected to disappear with async crypto. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPSEC]: Store IPv6 nh pointer in mac_header on outputHerbert Xu2007-10-111-1/+1
| | | | | | | | | | | | | | | | | | | | Current the x->mode->output functions store the IPv6 nh pointer in the skb network header. This is inconvenient because the network header then has to be fixed up before the packet can leave the IPsec stack. The mac header field is unused on output so we can use that to store this instead. This patch does that and removes the network header fix-up in xfrm_output. It also uses ipv6_hdr where appropriate in the x->type->output functions. There is also a minor clean-up in esp4 to make it use the same code as esp6 to help any subsequent effort to merge the two. Lastly it kills two redundant skb_set_* statements in BEET that were simply copied over from transport mode. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPSEC]: Move output replay code into xfrm_outputHerbert Xu2007-10-111-2/+2
| | | | | | | | | | The replay counter is one of only two remaining things in the output code that requires a lock on the xfrm state (the other being the crypto). This patch moves it into the generic xfrm_output so we can remove the lock from the transforms themselves. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPSEC] esp: Remove keys from esp_data structureHerbert Xu2007-10-111-11/+5
| | | | | | | | | | | The keys are only used during initialisation so we don't need to carry them in esp_data. Since we don't have to allocate them again, there is no need to place a limit on the authentication key length anymore. This patch also kills the unused auth.icv member. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* [XFRM]: Add module alias for transformation type.Masahide NAKAMURA2007-07-111-0/+1
| | | | | | | | | | | | | | | It is clean-up for XFRM type modules and adds aliases with its protocol: ESP, AH, IPCOMP, IPIP and IPv6 for IPsec ROUTING and DSTOPTS for MIPv6 It is almost the same thing as XFRM mode alias, but it is added new defines XFRM_PROTO_XXX for preprocessing since some protocols are defined as enum. Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org> Acked-by: Ingo Oeser <netdev@axxeo.de> Signed-off-by: David S. Miller <davem@davemloft.net>
* [XFRM]: beet: fix worst case header_len calculationPatrick McHardy2007-04-261-1/+2
| | | | | | | | | | | | | esp_init_state doesn't account for the beet pseudo header in the header_len calculation, which may result in undersized skbs hitting xfrm4_beet_output, causing unnecessary reallocations in ip_finish_output2. The skbs should still always have enough room to avoid causing skb_under_panic in skb_push since we have at least 16 bytes available from LL_RESERVED_SPACE in xfrm_state_check_space. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [XFRM]: Optimize MTU calculationPatrick McHardy2007-04-261-12/+18
| | | | | | | | | | | Replace the probing based MTU estimation, which usually takes 2-3 iterations to find a fitting value and may underestimate the MTU, by an exact calculation. Also fix underestimation of the XFRM trailer_len, which causes unnecessary reallocations. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [XFRM]: esp: fix skb_tail_pointer conversion bugPatrick McHardy2007-04-261-1/+1
| | | | | | | | | | | | | | | Fix incorrect switch of "trailer" skb by "skb" during skb_tail_pointer conversion: - *(u8*)(trailer->tail - 1) = top_iph->protocol; + *(skb_tail_pointer(skb) - 1) = top_iph->protocol; - *(u8 *)(trailer->tail - 1) = *skb_network_header(skb); + *(skb_tail_pointer(skb) - 1) = *skb_network_header(skb); Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [SK_BUFF]: Convert skb->tail to sk_buff_data_tArnaldo Carvalho de Melo2007-04-261-3/+5
| | | | | | | | | | | | | | | So that it is also an offset from skb->head, reduces its size from 8 to 4 bytes on 64bit architectures, allowing us to combine the 4 bytes hole left by the layer headers conversion, reducing struct sk_buff size to 256 bytes, i.e. 4 64byte cachelines, and since the sk_buff slab cache is SLAB_HWCACHE_ALIGN... :-) Many calculations that previously required that skb->{transport,network, mac}_header be first converted to a pointer now can be done directly, being meaningful as offsets or pointers. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [SK_BUFF]: Introduce icmp_hdr(), remove skb->h.icmphArnaldo Carvalho de Melo2007-04-261-2/+2
| | | | | Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [SK_BUFF]: Introduce skb_set_transport_headerArnaldo Carvalho de Melo2007-04-261-1/+2
| | | | | | | | For the cases where the transport header is being set to a offset from skb->data. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [SK_BUFF]: Introduce skb_transport_offset()Arnaldo Carvalho de Melo2007-04-261-1/+1
| | | | | | | For the quite common 'skb->h.raw - skb->data' sequence. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [SK_BUFF]: Introduce ip_hdr(), remove skb->nh.iphArnaldo Carvalho de Melo2007-04-261-2/+2
| | | | | Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [SK_BUFF]: Introduce skb_network_header()Arnaldo Carvalho de Melo2007-04-261-3/+4
| | | | | | | | | For the places where we need a pointer to the network header, it is still legal to touch skb->nh.raw directly if just adding to, subtracting from or setting it to another layer header. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET] IPV4: Fix whitespace errors.YOSHIFUJI Hideaki2007-02-111-4/+4
| | | | | Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV4]: encapsulation annotationsAl Viro2006-12-031-2/+2
| | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
* [XFRM]: BEET modeDiego Beltrami2006-10-041-7/+19
| | | | | | | | | | | | | | | | | This patch introduces the BEET mode (Bound End-to-End Tunnel) with as specified by the ietf draft at the following link: http://www.ietf.org/internet-drafts/draft-nikander-esp-beet-mode-06.txt The patch provides only single family support (i.e. inner family = outer family). Signed-off-by: Diego Beltrami <diego.beltrami@gmail.com> Signed-off-by: Miika Komu <miika@iki.fi> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Abhinav Pathak <abhinav.pathak@hiit.fi> Signed-off-by: Jeff Ahrenholz <ahrenholz@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPSEC] esp: Defer output IV initialization to first use.David S. Miller2006-09-231-2/+7
| | | | | | | | | | | | | | First of all, if the xfrm_state only gets used for input packets this entropy is a complete waste. Secondly, it is often the case that a configuration loads many rules (perhaps even dynamically) and they don't all necessarily ever get used. This get_random_bytes() call was showing up in the profiles for xfrm_state inserts which is how I noticed this. Signed-off-by: David S. Miller <davem@davemloft.net>
* [XFRM]: Add XFRM_MODE_xxx for future use.Masahide NAKAMURA2006-09-231-3/+3
| | | | | | | | | | | | | Transformation mode is used as either IPsec transport or tunnel. It is required to add two more items, route optimization and inbound trigger for Mobile IPv6. Based on MIPL2 kernel patch. This patch was also written by: Ville Nuorvala <vnuorval@tcs.hut.fi> Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org> Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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