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/
usr/
src/
linux-headers-3.0.0-14/
include/
net/
- drwxr-xr-x
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Viewing file:  ip6_fib.h (5.23 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
/*
* Linux INET6 implementation
*
* Authors:
* Pedro Roque <roque@di.fc.ul.pt>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#ifndef _IP6_FIB_H
#define _IP6_FIB_H
#include <linux/ipv6_route.h>
#include <linux/rtnetlink.h>
#include <linux/spinlock.h>
#include <net/dst.h>
#include <net/flow.h>
#include <net/netlink.h>
#include <net/inetpeer.h>
#ifdef CONFIG_IPV6_MULTIPLE_TABLES
#define FIB6_TABLE_HASHSZ 256
#else
#define FIB6_TABLE_HASHSZ 1
#endif
struct rt6_info;
struct fib6_config {
u32 fc_table;
u32 fc_metric;
int fc_dst_len;
int fc_src_len;
int fc_ifindex;
u32 fc_flags;
u32 fc_protocol;
struct in6_addr fc_dst;
struct in6_addr fc_src;
struct in6_addr fc_prefsrc;
struct in6_addr fc_gateway;
unsigned long fc_expires;
struct nlattr *fc_mx;
int fc_mx_len;
struct nl_info fc_nlinfo;
};
struct fib6_node {
struct fib6_node *parent;
struct fib6_node *left;
struct fib6_node *right;
#ifdef CONFIG_IPV6_SUBTREES
struct fib6_node *subtree;
#endif
struct rt6_info *leaf;
__u16 fn_bit; /* bit key */
__u16 fn_flags;
__u32 fn_sernum;
struct rt6_info *rr_ptr;
};
#ifndef CONFIG_IPV6_SUBTREES
#define FIB6_SUBTREE(fn) NULL
#else
#define FIB6_SUBTREE(fn) ((fn)->subtree)
#endif
/*
* routing information
*
*/
struct rt6key {
struct in6_addr addr;
int plen;
};
struct fib6_table;
struct rt6_info {
struct dst_entry dst;
#define rt6i_dev dst.dev
#define rt6i_nexthop dst.neighbour
#define rt6i_expires dst.expires
/*
* Tail elements of dst_entry (__refcnt etc.)
* and these elements (rarely used in hot path) are in
* the same cache line.
*/
struct fib6_table *rt6i_table;
struct fib6_node *rt6i_node;
struct in6_addr rt6i_gateway;
atomic_t rt6i_ref;
/* These are in a separate cache line. */
struct rt6key rt6i_dst ____cacheline_aligned_in_smp;
u32 rt6i_flags;
struct rt6key rt6i_src;
struct rt6key rt6i_prefsrc;
u32 rt6i_metric;
u32 rt6i_peer_genid;
struct inet6_dev *rt6i_idev;
struct inet_peer *rt6i_peer;
#ifdef CONFIG_XFRM
u32 rt6i_flow_cache_genid;
#endif
/* more non-fragment space at head required */
unsigned short rt6i_nfheader_len;
u8 rt6i_protocol;
};
static inline struct inet6_dev *ip6_dst_idev(struct dst_entry *dst)
{
return ((struct rt6_info *)dst)->rt6i_idev;
}
struct fib6_walker_t {
struct list_head lh;
struct fib6_node *root, *node;
struct rt6_info *leaf;
unsigned char state;
unsigned char prune;
unsigned int skip;
unsigned int count;
int (*func)(struct fib6_walker_t *);
void *args;
};
struct rt6_statistics {
__u32 fib_nodes;
__u32 fib_route_nodes;
__u32 fib_rt_alloc; /* permanent routes */
__u32 fib_rt_entries; /* rt entries in table */
__u32 fib_rt_cache; /* cache routes */
__u32 fib_discarded_routes;
};
#define RTN_TL_ROOT 0x0001
#define RTN_ROOT 0x0002 /* tree root node */
#define RTN_RTINFO 0x0004 /* node with valid routing info */
/*
* priority levels (or metrics)
*
*/
struct fib6_table {
struct hlist_node tb6_hlist;
u32 tb6_id;
rwlock_t tb6_lock;
struct fib6_node tb6_root;
};
#define RT6_TABLE_UNSPEC RT_TABLE_UNSPEC
#define RT6_TABLE_MAIN RT_TABLE_MAIN
#define RT6_TABLE_DFLT RT6_TABLE_MAIN
#define RT6_TABLE_INFO RT6_TABLE_MAIN
#define RT6_TABLE_PREFIX RT6_TABLE_MAIN
#ifdef CONFIG_IPV6_MULTIPLE_TABLES
#define FIB6_TABLE_MIN 1
#define FIB6_TABLE_MAX RT_TABLE_MAX
#define RT6_TABLE_LOCAL RT_TABLE_LOCAL
#else
#define FIB6_TABLE_MIN RT_TABLE_MAIN
#define FIB6_TABLE_MAX FIB6_TABLE_MIN
#define RT6_TABLE_LOCAL RT6_TABLE_MAIN
#endif
typedef struct rt6_info *(*pol_lookup_t)(struct net *,
struct fib6_table *,
struct flowi6 *, int);
/*
* exported functions
*/
extern struct fib6_table *fib6_get_table(struct net *net, u32 id);
extern struct fib6_table *fib6_new_table(struct net *net, u32 id);
extern struct dst_entry *fib6_rule_lookup(struct net *net,
struct flowi6 *fl6, int flags,
pol_lookup_t lookup);
extern struct fib6_node *fib6_lookup(struct fib6_node *root,
const struct in6_addr *daddr,
const struct in6_addr *saddr);
struct fib6_node *fib6_locate(struct fib6_node *root,
const struct in6_addr *daddr, int dst_len,
const struct in6_addr *saddr, int src_len);
extern void fib6_clean_all(struct net *net,
int (*func)(struct rt6_info *, void *arg),
int prune, void *arg);
extern int fib6_add(struct fib6_node *root,
struct rt6_info *rt,
struct nl_info *info);
extern int fib6_del(struct rt6_info *rt,
struct nl_info *info);
extern void inet6_rt_notify(int event, struct rt6_info *rt,
struct nl_info *info);
extern void fib6_run_gc(unsigned long expires,
struct net *net);
extern void fib6_gc_cleanup(void);
extern int fib6_init(void);
#ifdef CONFIG_IPV6_MULTIPLE_TABLES
extern int fib6_rules_init(void);
extern void fib6_rules_cleanup(void);
#else
static inline int fib6_rules_init(void)
{
return 0;
}
static inline void fib6_rules_cleanup(void)
{
return ;
}
#endif
#endif
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