mirror of
https://github.com/torvalds/linux.git
synced 2025-11-04 10:40:15 +02:00
490ab08127
GRE-GSO generates ip fragments with id 0,2,3,4... for every GSO packet, which is not correct. Following patch fixes it by setting ip-header id unique id of fragments are allowed. As Eric Dumazet suggested it is optimized by using inner ip-header whenever inner packet is ipv4. Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Signed-off-by: David S. Miller <davem@davemloft.net>
91 lines
2.2 KiB
C
91 lines
2.2 KiB
C
#ifndef __NET_IPIP_H
|
|
#define __NET_IPIP_H 1
|
|
|
|
#include <linux/if_tunnel.h>
|
|
#include <net/gro_cells.h>
|
|
#include <net/ip.h>
|
|
|
|
/* Keep error state on tunnel for 30 sec */
|
|
#define IPTUNNEL_ERR_TIMEO (30*HZ)
|
|
|
|
/* 6rd prefix/relay information */
|
|
struct ip_tunnel_6rd_parm {
|
|
struct in6_addr prefix;
|
|
__be32 relay_prefix;
|
|
u16 prefixlen;
|
|
u16 relay_prefixlen;
|
|
};
|
|
|
|
struct ip_tunnel {
|
|
struct ip_tunnel __rcu *next;
|
|
struct net_device *dev;
|
|
|
|
int err_count; /* Number of arrived ICMP errors */
|
|
unsigned long err_time; /* Time when the last ICMP error arrived */
|
|
|
|
/* These four fields used only by GRE */
|
|
__u32 i_seqno; /* The last seen seqno */
|
|
__u32 o_seqno; /* The last output seqno */
|
|
int hlen; /* Precalculated GRE header length */
|
|
int mlink;
|
|
|
|
struct ip_tunnel_parm parms;
|
|
|
|
/* for SIT */
|
|
#ifdef CONFIG_IPV6_SIT_6RD
|
|
struct ip_tunnel_6rd_parm ip6rd;
|
|
#endif
|
|
struct ip_tunnel_prl_entry __rcu *prl; /* potential router list */
|
|
unsigned int prl_count; /* # of entries in PRL */
|
|
|
|
struct gro_cells gro_cells;
|
|
};
|
|
|
|
struct ip_tunnel_prl_entry {
|
|
struct ip_tunnel_prl_entry __rcu *next;
|
|
__be32 addr;
|
|
u16 flags;
|
|
struct rcu_head rcu_head;
|
|
};
|
|
|
|
static inline void iptunnel_xmit(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
int err;
|
|
struct iphdr *iph = ip_hdr(skb);
|
|
int pkt_len = skb->len - skb_transport_offset(skb);
|
|
struct pcpu_tstats *tstats = this_cpu_ptr(dev->tstats);
|
|
|
|
nf_reset(skb);
|
|
skb->ip_summed = CHECKSUM_NONE;
|
|
ip_select_ident(iph, skb_dst(skb), NULL);
|
|
|
|
err = ip_local_out(skb);
|
|
if (likely(net_xmit_eval(err) == 0)) {
|
|
u64_stats_update_begin(&tstats->syncp);
|
|
tstats->tx_bytes += pkt_len;
|
|
tstats->tx_packets++;
|
|
u64_stats_update_end(&tstats->syncp);
|
|
} else {
|
|
dev->stats.tx_errors++;
|
|
dev->stats.tx_aborted_errors++;
|
|
}
|
|
}
|
|
|
|
static inline void tunnel_ip_select_ident(struct sk_buff *skb,
|
|
const struct iphdr *old_iph,
|
|
struct dst_entry *dst)
|
|
{
|
|
struct iphdr *iph = ip_hdr(skb);
|
|
|
|
if (iph->frag_off & htons(IP_DF))
|
|
iph->id = 0;
|
|
else {
|
|
/* Use inner packet iph-id if possible. */
|
|
if (skb->protocol == htons(ETH_P_IP) && old_iph->id)
|
|
iph->id = old_iph->id;
|
|
else
|
|
__ip_select_ident(iph, dst,
|
|
(skb_shinfo(skb)->gso_segs ?: 1) - 1);
|
|
}
|
|
}
|
|
#endif
|