Acked-by: Jarno Rajahalme <[email protected]> > On Mar 2, 2017, at 7:29 PM, Joe Stringer <[email protected]> wrote: > > From: Lance Richardson <[email protected]> > > Upstream commit: > commit 75f01a4c9cc291ff5cb28ca1216adb163b7a20ee > Author: Lance Richardson <[email protected]> > Date: Thu Jan 12 19:33:18 2017 -0500 > > openvswitch: maintain correct checksum state in conntrack actions > > When executing conntrack actions on skbuffs with checksum mode > CHECKSUM_COMPLETE, the checksum must be updated to account for > header pushes and pulls. Otherwise we get "hw csum failure" > logs similar to this (ICMP packet received on geneve tunnel > via ixgbe NIC): > > [ 405.740065] genev_sys_6081: hw csum failure > [ 405.740106] CPU: 3 PID: 0 Comm: swapper/3 Tainted: G I > 4.10.0-rc3+ #1 > [ 405.740108] Call Trace: > [ 405.740110] <IRQ> > [ 405.740113] dump_stack+0x63/0x87 > [ 405.740116] netdev_rx_csum_fault+0x3a/0x40 > [ 405.740118] __skb_checksum_complete+0xcf/0xe0 > [ 405.740120] nf_ip_checksum+0xc8/0xf0 > [ 405.740124] icmp_error+0x1de/0x351 [nf_conntrack_ipv4] > [ 405.740132] nf_conntrack_in+0xe1/0x550 [nf_conntrack] > [ 405.740137] ? find_bucket.isra.2+0x62/0x70 [openvswitch] > [ 405.740143] __ovs_ct_lookup+0x95/0x980 [openvswitch] > [ 405.740145] ? netif_rx_internal+0x44/0x110 > [ 405.740149] ovs_ct_execute+0x147/0x4b0 [openvswitch] > [ 405.740153] do_execute_actions+0x22e/0xa70 [openvswitch] > [ 405.740157] ovs_execute_actions+0x40/0x120 [openvswitch] > [ 405.740161] ovs_dp_process_packet+0x84/0x120 [openvswitch] > [ 405.740166] ovs_vport_receive+0x73/0xd0 [openvswitch] > [ 405.740168] ? udp_rcv+0x1a/0x20 > [ 405.740170] ? ip_local_deliver_finish+0x93/0x1e0 > [ 405.740172] ? ip_local_deliver+0x6f/0xe0 > [ 405.740174] ? ip_rcv_finish+0x3a0/0x3a0 > [ 405.740176] ? ip_rcv_finish+0xdb/0x3a0 > [ 405.740177] ? ip_rcv+0x2a7/0x400 > [ 405.740180] ? __netif_receive_skb_core+0x970/0xa00 > [ 405.740185] netdev_frame_hook+0xd3/0x160 [openvswitch] > [ 405.740187] __netif_receive_skb_core+0x1dc/0xa00 > [ 405.740194] ? ixgbe_clean_rx_irq+0x46d/0xa20 [ixgbe] > [ 405.740197] __netif_receive_skb+0x18/0x60 > [ 405.740199] netif_receive_skb_internal+0x40/0xb0 > [ 405.740201] napi_gro_receive+0xcd/0x120 > [ 405.740204] gro_cell_poll+0x57/0x80 [geneve] > [ 405.740206] net_rx_action+0x260/0x3c0 > [ 405.740209] __do_softirq+0xc9/0x28c > [ 405.740211] irq_exit+0xd9/0xf0 > [ 405.740213] do_IRQ+0x51/0xd0 > [ 405.740215] common_interrupt+0x93/0x93 > > Fixes: 7f8a436eaa2c ("openvswitch: Add conntrack action") > Signed-off-by: Lance Richardson <[email protected]> > Acked-by: Pravin B Shelar <[email protected]> > Signed-off-by: David S. Miller <[email protected]> > > Upstream: 75f01a4c9cc2 ("openvswitch: maintain correct checksum state in > conntrack actions") > Signed-off-by: Joe Stringer <[email protected]> > --- > datapath/conntrack.c | 6 ++++-- > 1 file changed, 4 insertions(+), 2 deletions(-) > > diff --git a/datapath/conntrack.c b/datapath/conntrack.c > index e4e76b836805..36db32abbf63 100644 > --- a/datapath/conntrack.c > +++ b/datapath/conntrack.c > @@ -555,7 +555,7 @@ static int ovs_ct_nat_execute(struct sk_buff *skb, struct > nf_conn *ct, > int hooknum, nh_off, err = NF_ACCEPT; > > nh_off = skb_network_offset(skb); > - skb_pull(skb, nh_off); > + skb_pull_rcsum(skb, nh_off); > > /* See HOOK2MANIP(). */ > if (maniptype == NF_NAT_MANIP_SRC) > @@ -620,6 +620,7 @@ static int ovs_ct_nat_execute(struct sk_buff *skb, struct > nf_conn *ct, > err = nf_nat_packet(ct, ctinfo, hooknum, skb); > push: > skb_push(skb, nh_off); > + skb_postpush_rcsum(skb, skb->data, nh_off); > > return err; > } > @@ -927,7 +928,7 @@ int ovs_ct_execute(struct net *net, struct sk_buff *skb, > > /* The conntrack module expects to be working at L3. */ > nh_ofs = skb_network_offset(skb); > - skb_pull(skb, nh_ofs); > + skb_pull_rcsum(skb, nh_ofs); > > if (key->ip.frag != OVS_FRAG_TYPE_NONE) { > err = handle_fragments(net, key, info->zone.id, skb); > @@ -941,6 +942,7 @@ int ovs_ct_execute(struct net *net, struct sk_buff *skb, > err = ovs_ct_lookup(net, key, info, skb); > > skb_push(skb, nh_ofs); > + skb_postpush_rcsum(skb, skb->data, nh_ofs); > if (err) > kfree_skb(skb); > return err; > -- > 2.11.1 >
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