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2010-10-21tproxy: add lookup type checks for UDP in nf_tproxy_get_sock_v4()Balazs Scheidler1-48/+0
Also, inline this function as the lookup_type is always a literal and inlining removes branches performed at runtime. Signed-off-by: Balazs Scheidler <bazsi@balabit.hu> Signed-off-by: KOVACS Krisztian <hidden@balabit.hu> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-10-21tproxy: kick out TIME_WAIT sockets in case a new connection comes in with the same tupleBalazs Scheidler3-14/+85
Without tproxy redirections an incoming SYN kicks out conflicting TIME_WAIT sockets, in order to handle clients that reuse ports within the TIME_WAIT period. The same mechanism didn't work in case TProxy is involved in finding the proper socket, as the time_wait processing code looked up the listening socket assuming that the listener addr/port matches those of the established connection. This is not the case with TProxy as the listener addr/port is possibly changed with the tproxy rule. Signed-off-by: Balazs Scheidler <bazsi@balabit.hu> Signed-off-by: KOVACS Krisztian <hidden@balabit.hu> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-10-19Fixed race condition at ip_vs.ko module init.Eduardo Blanco1-9/+10
Lists were initialized after the module was registered. Multiple ipvsadm processes at module load triggered a race condition that resulted in a null pointer dereference in do_ip_vs_get_ctl(). As a result, __ip_vs_mutex was left locked preventing all further ipvsadm commands. Signed-off-by: Eduardo J. Blanco <ejblanco@google.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2010-10-19ipvs: IPv6 tunnel modeHans Schillstrom1-79/+92
IPv6 encapsulation uses a bad source address for the tunnel. i.e. VIP will be used as local-addr and encap. dst addr. Decapsulation will not accept this. Example LVS (eth1 2003::2:0:1/96, VIP 2003::2:0:100) (eth0 2003::1:0:1/96) RS (ethX 2003::1:0:5/96) tcpdump 2003::2:0:100 > 2003::1:0:5: IP6 (hlim 63, next-header TCP (6) payload length: 40) 2003::3:0:10.50991 > 2003::2:0:100.http: Flags [S], cksum 0x7312 (correct), seq 3006460279, win 5760, options [mss 1440,sackOK,TS val 1904932 ecr 0,nop,wscale 3], length 0 In Linux IPv6 impl. you can't have a tunnel with an any cast address receiving packets (I have not tried to interpret RFC 2473) To have receive capabilities the tunnel must have: - Local address set as multicast addr or an unicast addr - Remote address set as an unicast addr. - Loop back addres or Link local address are not allowed. This causes us to setup a tunnel in the Real Server with the LVS as the remote address, here you can't use the VIP address since it's used inside the tunnel. Solution Use outgoing interface IPv6 address (match against the destination). i.e. use ip6_route_output() to look up the route cache and then use ipv6_dev_get_saddr(...) to set the source address of the encapsulated packet. Additionally, cache the results in new destination fields: dst_cookie and dst_saddr and properly check the returned dst from ip6_route_output. We now add xfrm_lookup call only for the tunneling method where the source address is a local one. Signed-off-by:Hans Schillstrom <hans.schillstrom@ericsson.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-10-19netfilter: ctnetlink: add expectation deletion eventsPablo Neira Ayuso2-11/+25
This patch allows to listen to events that inform about expectations destroyed. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-10-18netfilter: fix kconfig unmet dependency warningRandy Dunlap2-4/+4
Fix netfilter kconfig unmet dependencies warning & spell out "compatible" while there. warning: (IP_NF_TARGET_TTL && NET && INET && NETFILTER && IP_NF_IPTABLES && NETFILTER_ADVANCED || IP6_NF_TARGET_HL && NET && INET && IPV6 && NETFILTER && IP6_NF_IPTABLES && NETFILTER_ADVANCED) selects NETFILTER_XT_TARGET_HL which has unmet direct dependencies ((IP_NF_MANGLE || IP6_NF_MANGLE) && NETFILTER_ADVANCED) Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-10-13IPVS: ip_vs_dbg_callid() is only needed for debuggingSimon Horman1-0/+2
ip_vs_dbg_callid() and IP_VS_DEBUG_CALLID() are only needed it CONFIG_IP_VS_DEBUG is defined. This resolves the following build warning when CONFIG_IP_VS_DEBUG is not defined. net/netfilter/ipvs/ip_vs_pe_sip.c:11: warning: 'ip_vs_dbg_callid' defined but not used Reported-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Simon Horman <horms@verge.net.au> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-10-13netfilter: xtables: resolve indirect macros 3/3Jan Engelhardt5-27/+27
2010-10-13netfilter: xtables: resolve indirect macros 2/3Jan Engelhardt4-79/+79
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
2010-10-13netfilter: xtables: resolve indirect macros 1/3Jan Engelhardt3-17/+17
Many of the used macros are just there for userspace compatibility. Substitute the in-kernel code to directly use the terminal macro and stuff the defines into #ifndef __KERNEL__ sections. Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
2010-10-04netfilter: unregister nf hooks, matches and targets in the reverse orderChangli Gao2-12/+6
Since we register nf hooks, matches and targets in order, we'd better unregister them in the reverse order. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-10-04netfilter: remove duplicated includeNicolas Kaiser1-1/+0
Remove duplicated include. Signed-off-by: Nicolas Kaiser <nikai@nikai.net> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-10-04netfilter: ipt_LOG: add bufferisation to call printk() onceEric Dumazet2-150/+152
ipt_LOG & ip6t_LOG use lot of calls to printk() and use a lock in a hope several cpus wont mix their output in syslog. printk() being very expensive [1], its better to call it once, on a prebuilt and complete line. Also, with mixed IPv4 and IPv6 trafic, separate IPv4/IPv6 locks dont avoid garbage. I used an allocation of a 1024 bytes structure, sort of seq_printf() but with a fixed size limit. Use a static buffer if dynamic allocation failed. Emit a once time alert if buffer size happens to be too short. [1]: printk() has various features like printk_delay()... Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-10-04netfilter: nf_nat: make find/put staticStephen Hemminger1-4/+2
The functions nf_nat_proto_find_get and nf_nat_proto_put are only used internally in nf_nat_core. This might break some out of tree NAT module. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-10-04IPVS: sip persistence engineSimon Horman3-0/+177
Add the SIP callid as a key for persistence. This allows multiple connections from the same IP address to be differentiated on the basis of the callid. When used in conjunction with the persistence mask, it allows connections from different IP addresses to be aggregated on the basis of the callid. It is envisaged that a persistence mask of 0.0.0.0 will be a useful setting. That is, ignore the source IP address when checking for persistence. It is envisaged that this option will be used in conjunction with one-packet scheduling. This only works with UDP and cannot be made to work with TCP within the current framework. Signed-off-by: Simon Horman <horms@verge.net.au> Acked-by: Julian Anastasov <ja@ssi.bg>
2010-10-04IPVS: Fallback if persistence engine failsSimon Horman2-9/+7
Fall back to normal persistence handling if the persistence engine fails to recognise a packet. This way, at least the packet will go somewhere. It is envisaged that iptables could be used to block packets such if this is not desired although nf_conntrack_sip would likely need to be enhanced first. Signed-off-by: Simon Horman <horms@verge.net.au> Acked-by: Julian Anastasov <ja@ssi.bg>
2010-10-04IPVS: Allow configuration of persistence enginesSimon Horman1-3/+54
Allow the persistence engine of a virtual service to be set, edited and unset. This feature only works with the netlink user-space interface. Signed-off-by: Simon Horman <horms@verge.net.au> Acked-by: Julian Anastasov <ja@ssi.bg>
2010-10-04IPVS: management of persistence engine modulesSimon Horman2-1/+148
This is based heavily on the scheduler management code Signed-off-by: Simon Horman <horms@verge.net.au> Acked-by: Julian Anastasov <ja@ssi.bg>
2010-10-04IPVS: Add persistence engine data to /proc/net/ip_vs_connSimon Horman1-5/+20
This shouldn't break compatibility with userspace as the new data is at the end of the line. I have confirmed that this doesn't break ipvsadm, the main (only?) user-space user of this data. Signed-off-by: Simon Horman <horms@verge.net.au> Acked-by: Julian Anastasov <ja@ssi.bg>
2010-10-04IPVS: Add struct ip_vs_peSimon Horman3-20/+100
Signed-off-by: Simon Horman <horms@verge.net.au> Acked-by: Julian Anastasov <ja@ssi.bg>
2010-10-04IPVS: ip_vs_{un,}bind_scheduler NULL argumentsSimon Horman2-22/+4
In general NULL arguments aren't passed by the few callers that exist, so don't test for them. The exception is to make passing NULL to ip_vs_unbind_scheduler() a noop. Signed-off-by: Simon Horman <horms@verge.net.au> Acked-by: Julian Anastasov <ja@ssi.bg>
2010-10-04IPVS: Allow null argument to ip_vs_scheduler_put()Simon Horman2-10/+5
This simplifies caller logic sightly. Signed-off-by: Simon Horman <horms@verge.net.au> Acked-by: Julian Anastasov <ja@ssi.bg>
2010-10-04IPVS: Add struct ip_vs_conn_paramSimon Horman6-189/+181
Signed-off-by: Simon Horman <horms@verge.net.au> Acked-by: Julian Anastasov <ja@ssi.bg>
2010-10-04IPVS: compact ip_vs_sched_persist()Simon Horman1-105/+51
Compact ip_vs_sched_persist() by setting up parameters and calling functions once. Signed-off-by: Simon Horman <horms@verge.net.au> Acked-by: Julian Anastasov <ja@ssi.bg>
2010-10-04netfilter: nf_conntrack_sip: Add callid parserSimon Horman1-0/+39
Signed-off-by: Simon Horman <horms@verge.net.au> Acked-by: Julian Anastasov <ja@ssi.bg>
2010-10-04netfilter: nf_conntrack_sip: Allow ct_sip_get_header() to be called with a null ct argumentSimon Horman1-0/+3
Signed-off-by: Simon Horman <horms@verge.net.au> Acked-by: Julian Anastasov <ja@ssi.bg>
2010-09-28netfilter: ctnetlink: add support for user-space expectation helpersPablo Neira Ayuso2-31/+77
This patch adds the basic infrastructure to support user-space expectation helpers via ctnetlink and the netfilter queuing infrastructure NFQUEUE. Basically, this patch: * adds NF_CT_EXPECT_USERSPACE flag to identify user-space created expectations. I have also added a sanity check in __nf_ct_expect_check() to avoid that kernel-space helpers may create an expectation if the master conntrack has no helper assigned. * adds some branches to check if the master conntrack helper exists, otherwise we skip the code that refers to kernel-space helper such as the local expectation list and the expectation policy. * allows to set the timeout for user-space expectations with no helper assigned. * a list of expectations created from user-space that depends on ctnetlink (if this module is removed, they are deleted). * includes USERSPACE in the /proc output for expectations that have been created by a user-space helper. This patch also modifies ctnetlink to skip including the helper name in the Netlink messages if no kernel-space helper is set (since no user-space expectation has not kernel-space kernel assigned). You can access an example user-space FTP conntrack helper at: http://people.netfilter.org/pablo/userspace-conntrack-helpers/nf-ftp-helper-userspace-POC.tar.bz Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-09-22netfilter: ctnetlink: allow to specify the expectation flagsPablo Neira Ayuso1-1/+7
With this patch, you can specify the expectation flags for user-space created expectations. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-09-22netfilter: ctnetlink: missing validation of CTA_EXPECT_ZONE attributePablo Neira Ayuso1-0/+1
This patch adds the missing validation of the CTA_EXPECT_ZONE attribute in the ctnetlink code. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-09-22netfilter: nf_nat: better error handling of nf_ct_expect_related() in helpersPablo Neira Ayuso5-14/+93
This patch improves the situation in which the expectation table is full for conntrack NAT helpers. Basically, we give up if we don't find a place in the table instead of looping over nf_ct_expect_related() with a different port (we should only do this if it returns -EBUSY, for -EMFILE or -ESHUTDOWN I think that it's better to skip this). Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-09-21ipvs: changes related to service usecntJulian Anastasov2-154/+102
Change the usage of svc usecnt during command execution: - we check if svc is registered but we do not need to hold usecnt reference while under __ip_vs_mutex, only the packet handling needs it during scheduling - change __ip_vs_service_get to __ip_vs_service_find and __ip_vs_svc_fwm_get to __ip_vs_svc_fwm_find because now caller will increase svc->usecnt - put common code that calls update_service in __ip_vs_update_dest - put common code in ip_vs_unlink_service() and use it to unregister the service - add comment that svc should not be accessed after ip_vs_del_service anymore - all IP_VS_WAIT_WHILE calls are now unified: usecnt > 0 - Properly log the app ports As result, some problems are fixed: - possible use-after-free of svc in ip_vs_genl_set_cmd after ip_vs_del_service because our usecnt reference does not guarantee that svc is not freed on refcnt==0, eg. when no dests are moved to trash - possible usecnt leak in do_ip_vs_set_ctl after ip_vs_del_service when the service is not freed now, for example, when some destionations are moved into trash and svc->refcnt remains above 0. It is harmless because svc is not in hash anymore. Signed-off-by: Julian Anastasov <ja@ssi.bg> Acked-by: Simon Horman <horms@verge.net.au> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-09-21netfilter: save the hash of the tuple in the original direction for latter useChangli Gao1-34/+78
Since we don't change the tuple in the original direction, we can save it in ct->tuplehash[IP_CT_DIR_REPLY].hnode.pprev for __nf_conntrack_confirm() use. __hash_conntrack() is split into two steps: hash_conntrack_raw() is used to get the raw hash, and __hash_bucket() is used to get the bucket id. In SYN-flood case, early_drop() doesn't need to recompute the hash again. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-09-21ipvs: make rerouting optional with snat_rerouteJulian Anastasov2-8/+37
Add new sysctl flag "snat_reroute". Recent kernels use ip_route_me_harder() to route LVS-NAT responses properly by VIP when there are multiple paths to client. But setups that do not have alternative default routes can skip this routing lookup by using snat_reroute=0. Signed-off-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-09-21ipvs: netfilter connection tracking changesJulian Anastasov8-195/+430
Add more code to IPVS to work with Netfilter connection tracking and fix some problems. - Allow IPVS to be compiled without connection tracking as in 2.6.35 and before. This can avoid keeping conntracks for all IPVS connections because this costs memory. ip_vs_ftp still depends on connection tracking and NAT as implemented for 2.6.36. - Add sysctl var "conntrack" to enable connection tracking for all IPVS connections. For loaded IPVS directors it needs tuning of nf_conntrack_max limit. - Add IP_VS_CONN_F_NFCT connection flag to request the connection to use connection tracking. This allows user space to provide this flag, for example, in dest->conn_flags. This can be useful to request connection tracking per real server instead of forcing it for all connections with the "conntrack" sysctl. This flag is set currently only by ip_vs_ftp and of course by "conntrack" sysctl. - Add ip_vs_nfct.c file to hold all connection tracking code, by this way main code should not depend of netfilter conntrack support. - Return back the ip_vs_post_routing handler as in 2.6.35 and use skb->ipvs_property=1 to allow IPVS to work without connection tracking Connection tracking: - most of the code is already in 2.6.36-rc - alter conntrack reply tuple for LVS-NAT connections when first packet from client is forwarded and conntrack state is NEW or RELATED. Additionally, alter reply for RELATED connections from real server, again for packet in original direction. - add IP_VS_XMIT_TUNNEL to confirm conntrack (without altering reply) for LVS-TUN early because we want to call nf_reset. It is needed because we add IPIP header and the original conntrack should be preserved, not destroyed. The transmitted IPIP packets can reuse same conntrack, so we do not set skb->ipvs_property. - try to destroy conntrack when the IPVS connection is destroyed. It is not fatal if conntrack disappears before that, it depends on the used timers. Fix problems from long time: - add skb->ip_summed = CHECKSUM_NONE for the LVS-TUN transmitters Signed-off-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-09-17ipvs: extend connection flags to 32 bitsJulian Anastasov3-13/+19
- the sync protocol supports 16 bits only, so bits 0..15 should be used only for flags that should go to backup server, bits 16 and above should be allocated for flags not sent to backup. - use IP_VS_CONN_F_DEST_MASK as mask of connection flags in destination that can be changed by user space - allow IP_VS_CONN_F_ONE_PACKET to be set in destination Signed-off-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-09-16netfilter: nf_conntrack: fix the hash random initializing raceChangli Gao1-6/+13
nf_conntrack_alloc() isn't called with nf_conntrack_lock locked, so hash random initializing code maybe executed more than once on different CPUs. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-09-16netfilter: nf_nat: no IP_NAT_RANGE_MAP_IPS flags when alloc_null_binding()Changli Gao1-9/+8
When alloc_null_binding(), no IP_NAT_RNAGE_MAP_IPS in flags means no IP address translation is needed. It isn't necessary to specify the address explicitly. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-09-16netfilter: nf_nat_core: don't check if the tuple is used if there is no other choiceChangli Gao1-5/+11
Eliminate nf_nat_used_tuple() to save some CPU cycles when there is no other choice. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-09-16netfilter: use NFPROTO_IPV4 instead of AF_INETChangli Gao1-1/+1
The field family of xt_target should be NFPROTO_IPV4, though NFPROTO_IPV4 and AF_INET are the same. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-09-15netfilter: nf_nat: add nf_nat_csum()Changli Gao1-45/+31
Add a static function nf_nat_csum() to replace the duplicate code in nf_nat_mangle_udp_packet() and __nf_nat_mangle_tcp_packet(). Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-09-13flow: better memory managementEric Dumazet1-36/+42
Allocate hash tables for every online cpus, not every possible ones. NUMA aware allocations. Dont use a full page on arches where PAGE_SIZE > 1024*sizeof(void *) misc: __percpu , __read_mostly, __cpuinit annotations flow_compare_t is just an "unsigned long" Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-10pkt_sched: remov unnecessary bh_disablestephen hemminger1-2/+2
Now that est_tree_lock is acquired with BH protection, the other call is unnecessary. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-10fib: cleanupsEric Dumazet1-32/+23
Use rcu_dereference_rtnl() helper Change hard coded constants in fib_flag_trans() 7 -> RTN_UNREACHABLE 8 -> RTN_PROHIBIT Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-09Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6David S. Miller42-258/+342
Conflicts: net/mac80211/main.c
2010-09-09tipc: Optimize handling excess content on incoming messagesPaul Gortmaker2-10/+4
Remove code that trimmed excess trailing info from incoming messages arriving over an Ethernet interface. TIPC now ignores the extra info while the message is being processed by the node, and only trims it off if the message is retransmitted to another node. (This latter step is done to ensure the extra info doesn't cause the sk_buff to exceed the outgoing interface's MTU limit.) The outgoing buffer is guaranteed to be linear. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-09tunnels: missing rcu_assign_pointer()Eric Dumazet2-2/+2
xfrm4_tunnel_register() & xfrm6_tunnel_register() should use rcu_assign_pointer() to make sure previous writes (to handler->next) are committed to memory before chain insertion. deregister functions dont need a particular barrier. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-09net/core: add lock context change annotations in net/core/sock.cNamhyung Kim1-0/+4
__lock_sock() and __release_sock() releases and regrabs lock but were missing proper annotations. Add it. This removes following warning from sparse. (Currently __lock_sock() does not emit any warning about it but I think it is better to add also.) net/core/sock.c:1580:17: warning: context imbalance in '__release_sock' - unexpected unlock Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-09net/core: remove address space warnings on verify_iovec()Namhyung Kim1-2/+4
move_addr_to_kernel() and copy_from_user() requires their argument as __user pointer but were missing proper markups. Add it. This removes following warnings from sparse. net/core/iovec.c:44:52: warning: incorrect type in argument 1 (different address spaces) net/core/iovec.c:44:52: expected void [noderef] <asn:1>*uaddr net/core/iovec.c:44:52: got void *msg_name net/core/iovec.c:55:34: warning: incorrect type in argument 2 (different address spaces) net/core/iovec.c:55:34: expected void const [noderef] <asn:1>*from net/core/iovec.c:55:34: got struct iovec *msg_iov Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-09sctp: fix test for end of loopJoe Perches1-23/+23
Add a list_has_sctp_addr function to simplify loop Based on a patches by Dan Carpenter and David Miller Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-09Merge branch 'for-davem' of git://oss.oracle.com/git/agrover/linux-2.6David S. Miller40-1572/+2548
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