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35fc92a9de
kernel-ark/net/ipv4
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Herbert Xu 35fc92a9de [NET]: Allow forwarding of ip_summed except CHECKSUM_COMPLETE 
Right now Xen has a horrible hack that lets it forward packets with
partial checksums.  One of the reasons that CHECKSUM_PARTIAL and
CHECKSUM_COMPLETE were added is so that we can get rid of this hack
(where it creates two extra bits in the skbuff to essentially mirror
ip_summed without being destroyed by the forwarding code).

I had forgotten that I've already gone through all the deivce drivers
last time around to make sure that they're looking at ip_summed ==
CHECKSUM_PARTIAL rather than ip_summed != 0 on transmit.  In any case,
I've now done that again so it should definitely be safe.

Unfortunately nobody has yet added any code to update CHECKSUM_COMPLETE
values on forward so we I'm setting that to CHECKSUM_NONE.  This should
be safe to remove for bridging but I'd like to check that code path
first.

So here is the patch that lets us get rid of the hack by preserving
ip_summed (mostly) on forwarded packets.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-04-25 22:28:16 -07:00
..
ipvs [SK_BUFF]: Convert skb->tail to sk_buff_data_t 2007-04-25 22:26:28 -07:00
netfilter [NETFILTER]: Use setup_timer 2007-04-25 22:27:43 -07:00
af_inet.c [INET]: Use jhash + random secret for ehash. 2007-04-25 22:28:06 -07:00
ah4.c [SK_BUFF]: unions of just one member don't get anything done, kill them 2007-04-25 22:26:20 -07:00
arp.c [SK_BUFF]: Introduce arp_hdr(), remove skb->nh.arph 2007-04-25 22:25:12 -07:00
cipso_ipv4.c [SK_BUFF]: Introduce ip_hdr(), remove skb->nh.iph 2007-04-25 22:25:10 -07:00
datagram.c [NET] IPV4: Fix whitespace errors. 2007-02-10 23:19:39 -08:00
devinet.c [IPv4]: Use rtnl registration interface 2007-04-25 22:27:08 -07:00
esp4.c [SK_BUFF]: Convert skb->tail to sk_buff_data_t 2007-04-25 22:26:28 -07:00
fib_frontend.c [IPv4]: Use rtnl registration interface 2007-04-25 22:27:08 -07:00
fib_hash.c [NET]: make seq_operations const 2007-04-25 22:25:03 -07:00
fib_lookup.h
fib_rules.c [NET] rules: Unified rules dumping 2007-04-25 22:27:17 -07:00
fib_semantics.c [IPv4] fib: Fix out of bound access of fib_props[] 2007-03-25 18:48:03 -07:00
fib_trie.c [IPV4]: fib_trie root node settings 2007-04-25 22:26:32 -07:00
icmp.c [SK_BUFF]: Convert skb->tail to sk_buff_data_t 2007-04-25 22:26:28 -07:00
igmp.c [SK_BUFF]: Convert skb->tail to sk_buff_data_t 2007-04-25 22:26:28 -07:00
inet_connection_sock.c [NET] IPV4: Fix whitespace errors. 2007-02-10 23:19:39 -08:00
inet_diag.c [NETLINK]: Directly return -EINTR from netlink_dump_start() 2007-04-25 22:27:33 -07:00
inet_hashtables.c [NET] IPV4: Fix whitespace errors. 2007-02-10 23:19:39 -08:00
inet_timewait_sock.c
inetpeer.c [IPV4]: Optimize inet_getpeer() 2007-04-25 22:23:49 -07:00
ip_forward.c [NET]: Allow forwarding of ip_summed except CHECKSUM_COMPLETE 2007-04-25 22:28:16 -07:00
ip_fragment.c [SK_BUFF]: Introduce ip_hdr(), remove skb->nh.iph 2007-04-25 22:25:10 -07:00
ip_gre.c [SK_BUFF]: unions of just one member don't get anything done, kill them 2007-04-25 22:26:20 -07:00
ip_input.c [SK_BUFF]: Introduce skb_reset_transport_header(skb) 2007-04-25 22:25:15 -07:00
ip_options.c [SK_BUFF]: Introduce ip_hdr(), remove skb->nh.iph 2007-04-25 22:25:10 -07:00
ip_output.c [SK_BUFF]: unions of just one member don't get anything done, kill them 2007-04-25 22:26:20 -07:00
ip_sockglue.c [SK_BUFF]: Convert skb->tail to sk_buff_data_t 2007-04-25 22:26:28 -07:00
ipcomp.c [SK_BUFF]: unions of just one member don't get anything done, kill them 2007-04-25 22:26:20 -07:00
ipconfig.c [SK_BUFF]: Introduce skb_transport_header(skb) 2007-04-25 22:25:31 -07:00
ipip.c [SK_BUFF]: unions of just one member don't get anything done, kill them 2007-04-25 22:26:20 -07:00
ipmr.c [NETLINK]: Use nlmsg_trim() where appropriate 2007-04-25 22:26:37 -07:00
Kconfig [TCP] YeAH-TCP: algorithm implementation 2007-04-25 22:23:18 -07:00
Makefile [TCP] YeAH-TCP: algorithm implementation 2007-04-25 22:23:18 -07:00
multipath_drr.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
multipath_random.c [IPV4]: Use random32() in net/ipv4/multipath 2007-02-26 11:43:00 -08:00
multipath_rr.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
multipath_wrandom.c [IPV4]: Use random32() in net/ipv4/multipath 2007-02-26 11:43:00 -08:00
multipath.c
netfilter.c [SK_BUFF]: Introduce ip_hdr(), remove skb->nh.iph 2007-04-25 22:25:10 -07:00
proc.c [PATCH] mark struct file_operations const 7 2007-02-12 09:48:46 -08:00
protocol.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
raw.c [SK_BUFF]: unions of just one member don't get anything done, kill them 2007-04-25 22:26:20 -07:00
route.c [IPV4] LVS: Allow to send ICMP unreachable responses when real-servers are removed 2007-04-25 22:28:15 -07:00
syncookies.c [SK_BUFF]: Introduce tcp_hdr(), remove skb->h.th 2007-04-25 22:25:26 -07:00
sysctl_net_ipv4.c [TCP]: Add two new spurious RTO responses to FRTO 2007-04-25 22:23:23 -07:00
tcp_bic.c
tcp_cong.c [TCP]: Add RFC3742 Limited Slow-Start, controlled by variable sysctl_tcp_max_ssthresh. 2007-04-25 22:23:19 -07:00
tcp_cubic.c [TCP]: cubic update for net-2.6.22 2007-04-25 22:28:09 -07:00
tcp_diag.c
tcp_highspeed.c [NET] IPV4: Fix whitespace errors. 2007-02-10 23:19:39 -08:00
tcp_htcp.c [TCP]: cleanup of htcp (resend) 2007-02-12 13:34:03 -08:00
tcp_hybla.c [TCP]: whitespace cleanup 2007-04-25 22:24:13 -07:00
tcp_input.c [SK_BUFF]: Introduce skb_transport_header(skb) 2007-04-25 22:25:31 -07:00
tcp_ipv4.c [SK_BUFF]: Introduce tcp_hdr(), remove skb->h.th 2007-04-25 22:25:26 -07:00
tcp_lp.c
tcp_minisocks.c [SK_BUFF]: Introduce tcp_hdr(), remove skb->h.th 2007-04-25 22:25:26 -07:00
tcp_output.c [SK_BUFF]: Convert skb->tail to sk_buff_data_t 2007-04-25 22:26:28 -07:00
tcp_probe.c [TCP] tcp_probe: improvements for net-2.6.22 2007-04-25 22:28:10 -07:00
tcp_scalable.c
tcp_timer.c [TCP]: Abstract out all write queue operations. 2007-04-25 22:24:02 -07:00
tcp_vegas.c [TCP] vegas: Use type safe netlink interface 2007-04-25 22:27:26 -07:00
tcp_veno.c
tcp_westwood.c [TCP] westwood: Use type safe netlink interface 2007-04-25 22:27:26 -07:00
tcp_yeah.c [TCP] TCP Yeah: cleanup 2007-04-25 22:23:48 -07:00
tcp_yeah.h [NET]: div64_64 consolidate (rev3) 2007-04-25 22:23:33 -07:00
tcp.c [SK_BUFF]: Convert skb->tail to sk_buff_data_t 2007-04-25 22:26:28 -07:00
tunnel4.c [IPSEC]: Changing API of xfrm4_tunnel_register. 2007-02-13 12:54:47 -08:00
udp_impl.h [NET] IPV4: Fix whitespace errors. 2007-02-10 23:19:39 -08:00
udp.c [SK_BUFF]: Introduce icmp_hdr(), remove skb->h.icmph 2007-04-25 22:25:23 -07:00
udplite.c [UDP]: Clean up UDP-Lite receive checksum 2007-04-25 22:23:51 -07:00
xfrm4_input.c [SK_BUFF]: Introduce ip_hdr(), remove skb->nh.iph 2007-04-25 22:25:10 -07:00
xfrm4_mode_beet.c [SK_BUFF]: unions of just one member don't get anything done, kill them 2007-04-25 22:26:20 -07:00
xfrm4_mode_transport.c [SK_BUFF]: unions of just one member don't get anything done, kill them 2007-04-25 22:26:20 -07:00
xfrm4_mode_tunnel.c [SK_BUFF]: unions of just one member don't get anything done, kill them 2007-04-25 22:26:20 -07:00
xfrm4_output.c [SK_BUFF]: Introduce ip_hdr(), remove skb->nh.iph 2007-04-25 22:25:10 -07:00
xfrm4_policy.c [SK_BUFF]: Introduce ip_hdr(), remove skb->nh.iph 2007-04-25 22:25:10 -07:00
xfrm4_state.c
xfrm4_tunnel.c [SK_BUFF]: Introduce ip_hdr(), remove skb->nh.iph 2007-04-25 22:25:10 -07:00