Jay Vosburgh 2c26d34bbc net/core: Handle csum for CHECKSUM_COMPLETE VXLAN forwarding ... When using VXLAN tunnels and a sky2 device, I have experienced checksum failures of the following type: [ 4297.761899] eth0: hw csum failure [...] [ 4297.765223] Call Trace: [ 4297.765224] <IRQ> [<ffffffff8172f026>] dump_stack+0x46/0x58 [ 4297.765235] [<ffffffff8162ba52>] netdev_rx_csum_fault+0x42/0x50 [ 4297.765238] [<ffffffff8161c1a0>] ? skb_push+0x40/0x40 [ 4297.765240] [<ffffffff8162325c>] __skb_checksum_complete+0xbc/0xd0 [ 4297.765243] [<ffffffff8168c602>] tcp_v4_rcv+0x2e2/0x950 [ 4297.765246] [<ffffffff81666ca0>] ? ip_rcv_finish+0x360/0x360 These are reliably reproduced in a network topology of: container:eth0 == host(OVS VXLAN on VLAN) == bond0 == eth0 (sky2) -> switch When VXLAN encapsulated traffic is received from a similarly configured peer, the above warning is generated in the receive processing of the encapsulated packet. Note that the warning is associated with the container eth0. The skbs from sky2 have ip_summed set to CHECKSUM_COMPLETE, and because the packet is an encapsulated Ethernet frame, the checksum generated by the hardware includes the inner protocol and Ethernet headers. The receive code is careful to update the skb->csum, except in __dev_forward_skb, as called by dev_forward_skb. __dev_forward_skb calls eth_type_trans, which in turn calls skb_pull_inline(skb, ETH_HLEN) to skip over the Ethernet header, but does not update skb->csum when doing so. This patch resolves the problem by adding a call to skb_postpull_rcsum to update the skb->csum after the call to eth_type_trans. Signed-off-by: Jay Vosburgh <jay.vosburgh@canonical.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2014-12-26 16:16:51 -05:00
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datagram.c	skb_copy_datagram_iovec() can die	2014-12-09 16:29:11 -05:00
dev.c	net/core: Handle csum for CHECKSUM_COMPLETE VXLAN forwarding	2014-12-26 16:16:51 -05:00
dev_addr_lists.c	net: fix spelling for synchronized	2014-11-18 15:26:32 -05:00
dev_ioctl.c	dev_ioctl: use sizeof(x) instead of sizeof x	2014-11-18 15:27:32 -05:00
drop_monitor.c	net: Replace get_cpu_var through this_cpu_ptr	2014-08-26 13:45:47 -04:00
dst.c	dst: no need to take reference on DST_NOCACHE dsts	2014-12-09 16:08:17 -05:00
ethtool.c	ethtool: Support for configurable RSS hash function	2014-12-08 21:07:10 -05:00
fib_rules.c	net: fix 'ip rule' iif/oif device rename	2014-02-09 19:02:52 -08:00
filter.c	net: sock: fix access via invalid file descriptor	2014-12-10 23:34:27 -05:00
flow.c	CPU hotplug notifiers registration fixes for 3.15-rc1	2014-04-07 14:55:46 -07:00
flow_dissector.c	flow-dissector: Fix alignment issue in __skb_flow_get_ports	2014-10-10 15:33:47 -04:00
gen_estimator.c	net: sched: make bstats per cpu and estimator RCU safe	2014-09-30 01:02:26 -04:00
gen_stats.c	net_sched: fix unused variables in __gnet_stats_copy_basic_cpu()	2014-10-07 00:10:49 -04:00
iovec.c	fold verify_iovec() into copy_msghdr_from_user()	2014-11-19 16:23:49 -05:00
link_watch.c	net/core: include linux/types.h instead of asm/types.h	2014-11-18 15:26:32 -05:00
Makefile	dmaengine-3.17	2014-10-07 20:39:25 -04:00
neighbour.c	neigh: remove dynamic neigh table registration support	2014-11-11 15:23:54 -05:00
net-procfs.c
net-sysfs.c	net-sysfs: expose physical switch id for particular device	2014-12-02 20:01:22 -08:00
net-sysfs.h	net: netdev_kobject_init: annotate with __init	2014-01-05 20:27:54 -05:00
net-traces.c
net_namespace.c	bury struct proc_ns in fs/proc	2014-12-04 14:34:54 -05:00
netclassid_cgroup.c	cgroup: rename cgroup_subsys->base_cftypes to ->legacy_cftypes	2014-07-15 11:05:09 -04:00
netevent.c
netpoll.c	vlan: introduce *vlan_hwaccel_push_inside helpers	2014-11-21 14:20:17 -05:00
netprio_cgroup.c	cgroup: rename cgroup_subsys->base_cftypes to ->legacy_cftypes	2014-07-15 11:05:09 -04:00
pktgen.c	net: pktgen: Deletion of an unnecessary check before the function call "proc_remove"	2014-11-19 15:20:15 -05:00
ptp_classifier.c	net: filter: split 'struct sk_filter' into socket and bpf parts	2014-08-02 15:03:58 -07:00
request_sock.c	inet: reduce TLB pressure for listeners	2014-06-25 16:37:24 -07:00
rtnetlink.c	net: Disallow providing non zero VLAN ID for NIC drivers FDB add flow	2014-12-16 15:41:19 -05:00
scm.c	net: introduce helper macro for_each_cmsghdr	2014-12-10 22:41:55 -05:00
secure_seq.c	net: use ktime_get_ns() and ktime_get_real_ns() helpers	2014-08-22 19:57:23 -07:00
skbuff.c	net: Reset secmark when scrubbing packet	2014-12-24 00:21:43 -05:00
sock.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2014-12-13 13:33:26 -08:00
sock_diag.c	net: filter: split 'struct sk_filter' into socket and bpf parts	2014-08-02 15:03:58 -07:00
stream.c	net: replace macros net_random and net_srandom with direct calls to prandom	2014-01-14 15:15:25 -08:00
sysctl_net_core.c	net: provide a per host RSS key generic infrastructure	2014-11-16 15:59:11 -05:00
timestamping.c	net-timestamp: Make the clone operation stand-alone from phy timestamping	2014-09-05 17:43:45 -07:00
tso.c	net: tso: fix unaligned access to crafted TCP header in helper API	2014-10-22 12:52:55 -04:00
utils.c	net: Convert LIMIT_NETDEBUG to net_dbg_ratelimited	2014-11-11 14:10:31 -05:00