497c615aba
The current users of ip6_dst_lookup can be divided into two classes: 1) The caller holds no locks and is in user-context (UDP). 2) The caller does not want to lookup the dst cache at all. The second class covers everyone except UDP because most people do the cache lookup directly before calling ip6_dst_lookup. This patch adds ip6_sk_dst_lookup for the first class. Similarly ip6_dst_store users can be divded into those that need to take the socket dst lock and those that don't. This patch adds __ip6_dst_store for those (everyone except UDP/datagram) that don't need an extra lock. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
170 lines
4.4 KiB
C
170 lines
4.4 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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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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}
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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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write_lock(&sk->sk_dst_lock);
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__ip6_dst_store(sk, dst, daddr);
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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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