forked from Minki/linux
f83ef8c0b5
This patch adds GSO support for IPv6 and TCPv6. This is based on a patch by Ananda Raju <Ananda.Raju@neterion.com>. His original description is: This patch enables TSO over IPv6. Currently Linux network stacks restricts TSO over IPv6 by clearing of the NETIF_F_TSO bit from "dev->features". This patch will remove this restriction. This patch will introduce a new flag NETIF_F_TSO6 which will be used to check whether device supports TSO over IPv6. If device support TSO over IPv6 then we don't clear of NETIF_F_TSO and which will make the TCP layer to create TSO packets. Any device supporting TSO over IPv6 will set NETIF_F_TSO6 flag in "dev->features" along with NETIF_F_TSO. In case when user disables TSO using ethtool, NETIF_F_TSO will get cleared from "dev->features". So even if we have NETIF_F_TSO6 we don't get TSO packets created by TCP layer. SKB_GSO_TCPV4 renamed to SKB_GSO_TCP to make it generic GSO packet. SKB_GSO_UDPV4 renamed to SKB_GSO_UDP as UFO is not a IPv4 feature. UFO is supported over IPv6 also The following table shows there is significant improvement in throughput with normal frames and CPU usage for both normal and jumbo. -------------------------------------------------- | | 1500 | 9600 | | ------------------|-------------------| | | thru CPU | thru CPU | -------------------------------------------------- | TSO OFF | 2.00 5.5% id | 5.66 20.0% id | -------------------------------------------------- | TSO ON | 2.63 78.0 id | 5.67 39.0% id | -------------------------------------------------- Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
164 lines
4.3 KiB
C
164 lines
4.3 KiB
C
#ifndef _NET_IP6_ROUTE_H
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#define _NET_IP6_ROUTE_H
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#define IP6_RT_PRIO_FW 16
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#define IP6_RT_PRIO_USER 1024
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#define IP6_RT_PRIO_ADDRCONF 256
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#define IP6_RT_PRIO_KERN 512
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#define IP6_RT_FLOW_MASK 0x00ff
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struct route_info {
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__u8 type;
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__u8 length;
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__u8 prefix_len;
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#if defined(__BIG_ENDIAN_BITFIELD)
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__u8 reserved_h:3,
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route_pref:2,
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reserved_l:3;
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#elif defined(__LITTLE_ENDIAN_BITFIELD)
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__u8 reserved_l:3,
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route_pref:2,
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reserved_h:3;
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#endif
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__u32 lifetime;
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__u8 prefix[0]; /* 0,8 or 16 */
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};
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#ifdef __KERNEL__
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#include <net/flow.h>
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#include <net/ip6_fib.h>
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#include <net/sock.h>
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#include <linux/ip.h>
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#include <linux/ipv6.h>
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struct pol_chain {
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int type;
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int priority;
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struct fib6_node *rules;
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struct pol_chain *next;
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};
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extern struct rt6_info ip6_null_entry;
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extern int ip6_rt_gc_interval;
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extern void ip6_route_input(struct sk_buff *skb);
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extern struct dst_entry * ip6_route_output(struct sock *sk,
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struct flowi *fl);
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extern int ip6_route_me_harder(struct sk_buff *skb);
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extern void ip6_route_init(void);
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extern void ip6_route_cleanup(void);
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extern int ipv6_route_ioctl(unsigned int cmd, void __user *arg);
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extern int ip6_route_add(struct in6_rtmsg *rtmsg,
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struct nlmsghdr *,
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void *rtattr,
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struct netlink_skb_parms *req);
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extern int ip6_ins_rt(struct rt6_info *,
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struct nlmsghdr *,
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void *rtattr,
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struct netlink_skb_parms *req);
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extern int ip6_del_rt(struct rt6_info *,
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struct nlmsghdr *,
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void *rtattr,
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struct netlink_skb_parms *req);
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extern int ip6_rt_addr_add(struct in6_addr *addr,
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struct net_device *dev,
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int anycast);
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extern int ip6_rt_addr_del(struct in6_addr *addr,
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struct net_device *dev);
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extern void rt6_sndmsg(int type, struct in6_addr *dst,
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struct in6_addr *src,
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struct in6_addr *gw,
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struct net_device *dev,
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int dstlen, int srclen,
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int metric, __u32 flags);
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extern struct rt6_info *rt6_lookup(struct in6_addr *daddr,
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struct in6_addr *saddr,
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int oif, int flags);
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extern struct dst_entry *ndisc_dst_alloc(struct net_device *dev,
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struct neighbour *neigh,
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struct in6_addr *addr,
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int (*output)(struct sk_buff *));
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extern int ndisc_dst_gc(int *more);
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extern void fib6_force_start_gc(void);
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extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
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const struct in6_addr *addr,
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int anycast);
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/*
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* support functions for ND
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*
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*/
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extern struct rt6_info * rt6_get_dflt_router(struct in6_addr *addr,
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struct net_device *dev);
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extern struct rt6_info * rt6_add_dflt_router(struct in6_addr *gwaddr,
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struct net_device *dev,
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unsigned int pref);
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extern void rt6_purge_dflt_routers(void);
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extern int rt6_route_rcv(struct net_device *dev,
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u8 *opt, int len,
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struct in6_addr *gwaddr);
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extern void rt6_redirect(struct in6_addr *dest,
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struct in6_addr *saddr,
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struct neighbour *neigh,
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u8 *lladdr,
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int on_link);
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extern void rt6_pmtu_discovery(struct in6_addr *daddr,
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struct in6_addr *saddr,
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struct net_device *dev,
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u32 pmtu);
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struct nlmsghdr;
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struct netlink_callback;
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extern int inet6_dump_fib(struct sk_buff *skb, struct netlink_callback *cb);
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extern int inet6_rtm_newroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
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extern int inet6_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
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extern int inet6_rtm_getroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
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extern void rt6_ifdown(struct net_device *dev);
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extern void rt6_mtu_change(struct net_device *dev, unsigned mtu);
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extern rwlock_t rt6_lock;
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/*
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* Store a destination cache entry in a socket
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*/
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static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
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struct in6_addr *daddr)
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{
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struct ipv6_pinfo *np = inet6_sk(sk);
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struct rt6_info *rt = (struct rt6_info *) dst;
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write_lock(&sk->sk_dst_lock);
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sk_setup_caps(sk, dst);
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np->daddr_cache = daddr;
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np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
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write_unlock(&sk->sk_dst_lock);
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}
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static inline int ipv6_unicast_destination(struct sk_buff *skb)
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{
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struct rt6_info *rt = (struct rt6_info *) skb->dst;
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return rt->rt6i_flags & RTF_LOCAL;
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}
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#endif
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#endif
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