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WSL2-Linux-Kernel
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tunnels: harmonize cleanup done on skb on rx path 

The goal of this patch is to harmonize cleanup done on a skbuff on rx path.
Before this patch, behaviors were different depending of the tunnel type.

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nicolas Dichtel 2013-09-02 15:34:58 +02:00 коммит произвёл David S. Miller
Родитель 963a88b31d
Коммит ea23192e8e
7 изменённых файлов: 13 добавлений и 26 удалений
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12
include/net/dst.h
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@ -311,11 +311,13 @@ static inline void skb_dst_force(struct sk_buff *skb)
* __skb_tunnel_rx - prepare skb for rx reinsert
* @skb: buffer
* @dev: tunnel device
* @net: netns for packet i/o
*
* After decapsulation, packet is going to re-enter (netif_rx()) our stack,
* so make some cleanups. (no accounting done)
*/
static inline void __skb_tunnel_rx(struct sk_buff *skb, struct net_device *dev)
static inline void __skb_tunnel_rx(struct sk_buff *skb, struct net_device *dev,
struct net *net)
{
skb->dev = dev;
@ -327,8 +329,7 @@ static inline void __skb_tunnel_rx(struct sk_buff *skb, struct net_device *dev)
if (!skb->l4_rxhash)
skb->rxhash = 0;
skb_set_queue_mapping(skb, 0);
skb_dst_drop(skb);
nf_reset(skb);
skb_scrub_packet(skb, !net_eq(net, dev_net(dev)));
}
/**
@ -340,12 +341,13 @@ static inline void __skb_tunnel_rx(struct sk_buff *skb, struct net_device *dev)
* so make some cleanups, and perform accounting.
* Note: this accounting is not SMP safe.
*/
static inline void skb_tunnel_rx(struct sk_buff *skb, struct net_device *dev)
static inline void skb_tunnel_rx(struct sk_buff *skb, struct net_device *dev,
struct net *net)
{
/* TODO : stats should be SMP safe */
dev->stats.rx_packets++;
dev->stats.rx_bytes += skb->len;
__skb_tunnel_rx(skb, dev);
__skb_tunnel_rx(skb, dev, net);
}
/* Children define the path of the packet through the

3
net/ipv4/ip_tunnel.c
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@ -461,8 +461,7 @@ int ip_tunnel_rcv(struct ip_tunnel *tunnel, struct sk_buff *skb,
skb->dev = tunnel->dev;
}
if (!net_eq(tunnel->net, dev_net(tunnel->dev)))
skb_scrub_packet(skb, true);
skb_scrub_packet(skb, !net_eq(tunnel->net, dev_net(tunnel->dev)));
gro_cells_receive(&tunnel->gro_cells, skb);
return 0;

3
net/ipv4/ipmr.c
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@ -2067,9 +2067,8 @@ static int __pim_rcv(struct mr_table *mrt, struct sk_buff *skb,
skb_reset_network_header(skb);
skb->protocol = htons(ETH_P_IP);
skb->ip_summed = CHECKSUM_NONE;
skb->pkt_type = PACKET_HOST;
skb_tunnel_rx(skb, reg_dev);
skb_tunnel_rx(skb, reg_dev, dev_net(reg_dev));
netif_rx(skb);

5
net/ipv6/ip6_gre.c
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@ -509,8 +509,6 @@ static int ip6gre_rcv(struct sk_buff *skb)
goto drop;
}
secpath_reset(skb);
skb->protocol = gre_proto;
/* WCCP version 1 and 2 protocol decoding.
* - Change protocol to IP
@ -525,7 +523,6 @@ static int ip6gre_rcv(struct sk_buff *skb)
skb->mac_header = skb->network_header;
__pskb_pull(skb, offset);
skb_postpull_rcsum(skb, skb_transport_header(skb), offset);
skb->pkt_type = PACKET_HOST;
if (((flags&GRE_CSUM) && csum) ||
(!(flags&GRE_CSUM) && tunnel->parms.i_flags&GRE_CSUM)) {
@ -557,7 +554,7 @@ static int ip6gre_rcv(struct sk_buff *skb)
skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
}
__skb_tunnel_rx(skb, tunnel->dev);
__skb_tunnel_rx(skb, tunnel->dev, tunnel->net);
skb_reset_network_header(skb);

7
net/ipv6/ip6_tunnel.c
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@ -802,14 +802,12 @@ static int ip6_tnl_rcv(struct sk_buff *skb, __u16 protocol,
rcu_read_unlock();
goto discard;
}
secpath_reset(skb);
skb->mac_header = skb->network_header;
skb_reset_network_header(skb);
skb->protocol = htons(protocol);
skb->pkt_type = PACKET_HOST;
memset(skb->cb, 0, sizeof(struct inet6_skb_parm));
__skb_tunnel_rx(skb, t->dev);
__skb_tunnel_rx(skb, t->dev, t->net);
err = dscp_ecn_decapsulate(t, ipv6h, skb);
if (unlikely(err)) {
@ -829,9 +827,6 @@ static int ip6_tnl_rcv(struct sk_buff *skb, __u16 protocol,
tstats->rx_packets++;
tstats->rx_bytes += skb->len;
if (!net_eq(t->net, dev_net(t->dev)))
skb_scrub_packet(skb, true);
netif_rx(skb);
rcu_read_unlock();

3
net/ipv6/ip6mr.c
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@ -672,9 +672,8 @@ static int pim6_rcv(struct sk_buff *skb)
skb_reset_network_header(skb);
skb->protocol = htons(ETH_P_IPV6);
skb->ip_summed = CHECKSUM_NONE;
skb->pkt_type = PACKET_HOST;
skb_tunnel_rx(skb, reg_dev);
skb_tunnel_rx(skb, reg_dev, dev_net(reg_dev));
netif_rx(skb);

6
net/ipv6/sit.c
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@ -581,12 +581,10 @@ static int ipip6_rcv(struct sk_buff *skb)
tunnel->parms.iph.protocol != 0)
goto out;
secpath_reset(skb);
skb->mac_header = skb->network_header;
skb_reset_network_header(skb);
IPCB(skb)->flags = 0;
skb->protocol = htons(ETH_P_IPV6);
skb->pkt_type = PACKET_HOST;
if (tunnel->dev->priv_flags & IFF_ISATAP) {
if (!isatap_chksrc(skb, iph, tunnel)) {
@ -603,7 +601,7 @@ static int ipip6_rcv(struct sk_buff *skb)
}
}
__skb_tunnel_rx(skb, tunnel->dev);
__skb_tunnel_rx(skb, tunnel->dev, tunnel->net);
err = IP_ECN_decapsulate(iph, skb);
if (unlikely(err)) {
@ -621,8 +619,6 @@ static int ipip6_rcv(struct sk_buff *skb)
tstats->rx_packets++;
tstats->rx_bytes += skb->len;
if (!net_eq(tunnel->net, dev_net(tunnel->dev)))
skb_scrub_packet(skb, true);
netif_rx(skb);
return 0;