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2008-10-08netfilter: split netfilter IPv4 defragmentation into a separate moduleKOVACS Krisztian4-53/+107
Netfilter connection tracking requires all IPv4 packets to be defragmented. Both the socket match and the TPROXY target depend on this functionality, so this patch separates the Netfilter IPv4 defrag hooks into a separate module. Signed-off-by: KOVACS Krisztian <hidden@sch.bme.hu> Signed-off-by: Patrick McHardy <kaber@trash.net>
2008-10-08netfilter: netns nat: PPTP NAT in netnsAlexey Dobriyan1-1/+2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2008-10-08netfilter: netns nf_conntrack: fixup DNAT in netnsAlexey Dobriyan1-3/+3
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2008-10-08netfilter: netns nat: per-netns bysource hashAlexey Dobriyan1-27/+45
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2008-10-08netfilter: netns nat: per-netns NAT tableAlexey Dobriyan1-11/+29
Same story as with iptable_filter, iptables_raw tables. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2008-10-08netfilter: netns nat: fix ipt_MASQUERADE in netnsAlexey Dobriyan1-4/+2
First, allow entry in notifier hook. Second, start conntrack cleanup in netns to which netdevice belongs. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2008-10-08netfilter: netns nf_conntrack: per-netns ↵Alexey Dobriyan2-4/+4
net.netfilter.nf_conntrack_log_invalid sysctl Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2008-10-08netfilter: netns nf_conntrack: per-netns net.netfilter.nf_conntrack_checksum ↵Alexey Dobriyan2-2/+2
sysctl Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2008-10-08netfilter: netns nf_conntrack: per-netns /proc/net/stat/nf_conntrack, ↵Alexey Dobriyan1-5/+9
/proc/net/stat/ip_conntrack Show correct conntrack count, while I'm at it. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2008-10-08netfilter: netns nf_conntrack: per-netns statisticsAlexey Dobriyan1-2/+2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2008-10-08netfilter: netns nf_conntrack: pass conntrack to nf_conntrack_event_cache() ↵Alexey Dobriyan2-2/+2
not skb This is cleaner, we already know conntrack to which event is relevant. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2008-10-08netfilter: netns nf_conntrack: per-netns /proc/net/ip_conntrack, ↵Alexey Dobriyan1-19/+38
/proc/net/stat/ip_conntrack, /proc/net/ip_conntrack_expect Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2008-10-08netfilter: netns nf_conntrack: pass netns pointer to L4 protocol's ->error hookAlexey Dobriyan1-4/+4
Again, it's deducible from skb, but we're going to use it for nf_conntrack_checksum and statistics, so just pass it from upper layer. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2008-10-08netfilter: netns nf_conntrack: pass netns pointer to nf_conntrack_in()Alexey Dobriyan1-2/+2
It's deducible from skb->dev or skb->dst->dev, but we know netns at the moment of call, so pass it down and use for finding and creating conntracks. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2008-10-08netfilter: netns nf_conntrack: per-netns expectationsAlexey Dobriyan2-3/+5
Make per-netns a) expectation hash and b) expectations count. Expectations always belongs to netns to which it's master conntrack belong. This is natural and doesn't bloat expectation. Proc files and leaf users are stubbed to init_net, this is temporary. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2008-10-08netfilter: netns: fix {ip,6}_route_me_harder() in netnsAlexey Dobriyan1-3/+4
Take netns from skb->dst->dev. It should be safe because, they are called from LOCAL_OUT hook where dst is valid (though, I'm not exactly sure about IPVS and queueing packets to userspace). [Patrick: its safe everywhere since they already expect skb->dst to be set] Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2008-10-08netfilter: netns nf_conntrack: per-netns conntrack hashAlexey Dobriyan5-6/+7
* make per-netns conntrack hash Other solution is to add ->ct_net pointer to tuplehashes and still has one hash, I tried that it's ugly and requires more code deep down in protocol modules et al. * propagate netns pointer to where needed, e. g. to conntrack iterators. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2008-10-08netfilter: netns nf_conntrack: per-netns conntrack countAlexey Dobriyan2-2/+2
Sysctls and proc files are stubbed to init_net's one. This is temporary. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2008-10-08netfilter: netns: remove nf_*_net() wrappersAlexey Dobriyan4-13/+13
Now that dev_net() exists, the usefullness of them is even less. Also they're a big problem in resolving circular header dependencies necessary for NOTRACK-in-netns patch. See below. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2008-10-08netfilter: x_tables: use NFPROTO_* in extensionsJan Engelhardt16-51/+53
Signed-off-by: Jan Engelhardt <jengelh@medozas.de> Signed-off-by: Patrick McHardy <kaber@trash.net>
2008-10-08netfilter: rename ipt_recent to xt_recentJan Engelhardt3-515/+0
Like with other modules (such as ipt_state), ipt_recent.h is changed to forward definitions to (IOW include) xt_recent.h, and xt_recent.c is changed to use the new constant names. Signed-off-by: Jan Engelhardt <jengelh@medozas.de> Signed-off-by: Patrick McHardy <kaber@trash.net>
2008-10-08netfilter: Use unsigned types for hooknum and pf varsJan Engelhardt3-4/+4
and (try to) consistently use u_int8_t for the L3 family. Signed-off-by: Jan Engelhardt <jengelh@medozas.de> Signed-off-by: Patrick McHardy <kaber@trash.net>
2008-10-08netns: make udpv6 mib per/namespaceDenis V. Lunev1-3/+0
Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-08tcp: cleanup messy initializerIlpo Järvinen1-2/+2
I'm quite sure that if I give this function in its old format for you to inspect, you start to wonder what is the type of demanded or if it's a global variable. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-08tcp: kill pointless urg_modeIlpo Järvinen4-14/+20
It all started from me noticing that this urgent check in tcp_clean_rtx_queue is unnecessarily inside the loop. Then I took a longer look to it and found out that the users of urg_mode can trivially do without, well almost, there was one gotcha. Bonus: those funny people who use urg with >= 2^31 write_seq - snd_una could now rejoice too (that's the only purpose for the between being there, otherwise a simple compare would have done the thing). Not that I assume that the rest of the tcp code happily lives with such mind-boggling numbers :-). Alas, it turned out to be impossible to set wmem to such numbers anyway, yes I really tried a big sendfile after setting some wmem but nothing happened :-). ...Tcp_wmem is int and so is sk_sndbuf... So I hacked a bit variable to long and found out that it seems to work... :-) Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-08net: wrap sk->sk_backlog_rcv()Peter Zijlstra2-2/+2
Wrap calling sk->sk_backlog_rcv() in a function. This will allow extending the generic sk_backlog_rcv behaviour. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07inet: Don't lookup the socket if there's a socket attached to the skbKOVACS Krisztian1-3/+7
Use the socket cached in the skb if it's present. Signed-off-by: KOVACS Krisztian <hidden@sch.bme.hu> Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07inet: Add udplib_lookup_skb() helpersKOVACS Krisztian1-2/+12
To be able to use the cached socket reference in the skb during input processing we add a new set of lookup functions that receive the skb on their argument list. Signed-off-by: KOVACS Krisztian <hidden@sch.bme.hu> Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07inet_hashtables: Add inet_lookup_skb helpersArnaldo Carvalho de Melo1-2/+1
To be able to use the cached socket reference in the skb during input processing we add a new set of lookup functions that receive the skb on their argument list. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: KOVACS Krisztian <hidden@sch.bme.hu> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-06tcp: Respect SO_RCVLOWAT in tcp_poll().David S. Miller1-4/+8
Based upon a report by Vito Caputo. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-01udp: Export UDP socket lookup functionKOVACS Krisztian1-0/+7
The iptables tproxy code has to be able to do UDP socket hash lookups, so we have to provide an exported lookup function for this purpose. Signed-off-by: KOVACS Krisztian <hidden@sch.bme.hu> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-01tcp: Port redirection support for TCPKOVACS Krisztian3-1/+4
Current TCP code relies on the local port of the listening socket being the same as the destination address of the incoming connection. Port redirection used by many transparent proxying techniques obviously breaks this, so we have to store the original destination port address. This patch extends struct inet_request_sock and stores the incoming destination port value there. It also modifies the handshake code to use that value as the source port when sending reply packets. Signed-off-by: KOVACS Krisztian <hidden@sch.bme.hu> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-01ipv4: Make Netfilter's ip_route_me_harder() non-local address compatibleKOVACS Krisztian4-1/+9
Netfilter's ip_route_me_harder() tries to re-route packets either generated or re-routed by Netfilter. This patch changes ip_route_me_harder() to handle packets from non-locally-bound sockets with IP_TRANSPARENT set as local and to set the appropriate flowi flags when re-doing the routing lookup. Signed-off-by: KOVACS Krisztian <hidden@sch.bme.hu> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-01tcp: Handle TCP SYN+ACK/ACK/RST transparencyKOVACS Krisztian1-3/+9
The TCP stack sends out SYN+ACK/ACK/RST reply packets in response to incoming packets. The non-local source address check on output bites us again, as replies for transparently redirected traffic won't have a chance to leave the node. This patch selectively sets the FLOWI_FLAG_ANYSRC flag when doing the route lookup for those replies. Transparent replies are enabled if the listening socket has the transparent socket flag set. Signed-off-by: KOVACS Krisztian <hidden@sch.bme.hu> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-01ipv4: Make inet_sock.h independent of route.hKOVACS Krisztian1-0/+1
inet_iif() in inet_sock.h requires route.h. Since users of inet_iif() usually require other route.h functionality anyway this patch moves inet_iif() to route.h. Signed-off-by: KOVACS Krisztian <hidden@sch.bme.hu> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-01ipv4: Allow binding to non-local addresses if IP_TRANSPARENT is setTóth László Attila1-1/+1
Setting IP_TRANSPARENT is not really useful without allowing non-local binds for the socket. To make user-space code simpler we allow these binds even if IP_TRANSPARENT is set but IP_FREEBIND is not. Signed-off-by: Tóth László Attila <panther@balabit.hu> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-01ipv4: Implement IP_TRANSPARENT socket optionKOVACS Krisztian2-1/+15
This patch introduces the IP_TRANSPARENT socket option: enabling that will make the IPv4 routing omit the non-local source address check on output. Setting IP_TRANSPARENT requires NET_ADMIN capability. Signed-off-by: KOVACS Krisztian <hidden@sch.bme.hu> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-01ipv4: Loosen source address check on IPv4 outputJulian Anastasov1-7/+13
ip_route_output() contains a check to make sure that no flows with non-local source IP addresses are routed. This obviously makes using such addresses impossible. This patch introduces a flowi flag which makes omitting this check possible. The new flag provides a way of handling transparent and non-transparent connections differently. Signed-off-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: KOVACS Krisztian <hidden@sch.bme.hu> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-01Merge branch 'master' of ↵David S. Miller2-30/+34
master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/wireless/ath9k/core.c drivers/net/wireless/ath9k/main.c net/core/dev.c
2008-10-01tcp: Fix NULL dereference in tcp_4_send_ack()Vitaliy Gusev1-1/+1
Fix NULL dereference in tcp_4_send_ack(). As skb->dev is reset to NULL in tcp_v4_rcv() thus OOPS occurs: BUG: unable to handle kernel NULL pointer dereference at 00000000000004d0 IP: [<ffffffff80498503>] tcp_v4_send_ack+0x203/0x250 Stack: ffff810005dbb000 ffff810015c8acc0 e77b2c6e5f861600 a01610802e90cb6d 0a08010100000000 88afffff88afffff 0000000080762be8 0000000115c872e8 0004122000000000 0000000000000001 ffffffff80762b88 0000000000000020 Call Trace: <IRQ> [<ffffffff80499c33>] tcp_v4_reqsk_send_ack+0x20/0x22 [<ffffffff8049bce5>] tcp_check_req+0x108/0x14c [<ffffffff8047aaf7>] ? rt_intern_hash+0x322/0x33c [<ffffffff80499846>] tcp_v4_do_rcv+0x399/0x4ec [<ffffffff8045ce4b>] ? skb_checksum+0x4f/0x272 [<ffffffff80485b74>] ? __inet_lookup_listener+0x14a/0x15c [<ffffffff8049babc>] tcp_v4_rcv+0x6a1/0x701 [<ffffffff8047e739>] ip_local_deliver_finish+0x157/0x24a [<ffffffff8047ec9a>] ip_local_deliver+0x72/0x7c [<ffffffff8047e5bd>] ip_rcv_finish+0x38d/0x3b2 [<ffffffff803d3548>] ? scsi_io_completion+0x19d/0x39e [<ffffffff8047ebe5>] ip_rcv+0x2a2/0x2e5 [<ffffffff80462faa>] netif_receive_skb+0x293/0x303 [<ffffffff80465a9b>] process_backlog+0x80/0xd0 [<ffffffff802630b4>] ? __rcu_process_callbacks+0x125/0x1b4 [<ffffffff8046560e>] net_rx_action+0xb9/0x17f [<ffffffff80234cc5>] __do_softirq+0xa3/0x164 [<ffffffff8020c52c>] call_softirq+0x1c/0x28 <EOI> [<ffffffff8020de1c>] do_softirq+0x34/0x72 [<ffffffff80234b8e>] local_bh_enable_ip+0x3f/0x50 [<ffffffff804d43ca>] _spin_unlock_bh+0x12/0x14 [<ffffffff804599cd>] release_sock+0xb8/0xc1 [<ffffffff804a6f9a>] inet_stream_connect+0x146/0x25c [<ffffffff80243078>] ? autoremove_wake_function+0x0/0x38 [<ffffffff8045751f>] sys_connect+0x68/0x8e [<ffffffff80291818>] ? fd_install+0x5f/0x68 [<ffffffff80457784>] ? sock_map_fd+0x55/0x62 [<ffffffff8020b39b>] system_call_after_swapgs+0x7b/0x80 Code: 41 10 11 d0 83 d0 00 4d 85 ed 89 45 c0 c7 45 c4 08 00 00 00 74 07 41 8b 45 04 89 45 c8 48 8b 43 20 8b 4d b8 48 8d 55 b0 48 89 de <48> 8b 80 d0 04 00 00 48 8b b8 60 01 00 00 e8 20 ae fe ff 65 48 RIP [<ffffffff80498503>] tcp_v4_send_ack+0x203/0x250 RSP <ffffffff80762b78> CR2: 00000000000004d0 Signed-off-by: Vitaliy Gusev <vgusev@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-23tcp: Fix queue traversal in tcp_use_frto().David S. Miller1-0/+2
We must check tcp_skb_is_last() before doing a tcp_write_queue_next(). Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-23tcp: Fix order of tests in tcp_retransmit_skb()David S. Miller1-1/+1
tcp_write_queue_next() must only be made if we know that tcp_skb_is_last() evaluates to false. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-22net: Remove __skb_insert() calls outside of skbuff internals.David S. Miller1-2/+2
This minor cleanup simplifies later changes which will convert struct sk_buff and friends over to using struct list_head. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-21tcp: advertise MSS requested by userTom Quetchenbach2-3/+14
I'm trying to use the TCP_MAXSEG option to setsockopt() to set the MSS for both sides of a bidirectional connection. man tcp says: "If this option is set before connection establishment, it also changes the MSS value announced to the other end in the initial packet." However, the kernel only uses the MTU/route cache to set the advertised MSS. That means if I set the MSS to, say, 500 before calling connect(), I will send at most 500-byte packets, but I will still receive 1500-byte packets in reply. This is a bug, either in the kernel or the documentation. This patch (applies to latest net-2.6) reduces the advertised value to that requested by the user as long as setsockopt() is called before connect() or accept(). This seems like the behavior that one would expect as well as that which is documented. I've tried to make sure that things that depend on the advertised MSS are set correctly. Signed-off-by: Tom Quetchenbach <virtualphtn@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-21net: Use hton[sl]() instead of __constant_hton[sl]() where applicableArnaldo Carvalho de Melo1-2/+2
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-21tcp: back retransmit_high when it over-estimatedIlpo Järvinen1-2/+10
If lost skb is sacked, we might have nothing to retransmit as high as the retransmit_high is pointing to, so place it lower to avoid unnecessary walking. This is mainly for the case where high L'ed skbs gets sacked. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-21tcp: don't clear lost_skb_hint when not necessaryIlpo Järvinen1-1/+13
Most importantly avoid doing it with cumulative ACK. However, since we have lost_cnt_hint in the picture as well needing adjustments, it's not as trivial as dealing with retransmit_skb_hint (and cannot be done in the all place we could trivially leave retransmit_skb_hint untouched). With the previous patch, this should mostly remove O(n^2) behavior while cumulative ACKs start flowing once rexmit after a lossy round-trip made it through. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-21tcp: don't clear retransmit_skb_hint when not necessaryIlpo Järvinen2-4/+8
Most importantly avoid doing it with cumulative ACK. Not clearing means that we no longer need n^2 processing in resolution of each fast recovery. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-21tcp: remove retransmit_skb_hint clearing from failureIlpo Järvinen1-3/+1
This doesn't much sense here afaict, probably never has. Since fragmenting and collapsing deal the hints by themselves, there should be very little reason for the rexmit loop to do that. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-21tcp: reorganize retransmit code loopsIlpo Järvinen1-46/+33
Both loops are quite similar, so they can be combined with little effort. As a result, forward_skb_hint becomes obsolete as well. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
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