diff options
Diffstat (limited to 'include/net/ip6_fib.h')
| -rw-r--r-- | include/net/ip6_fib.h | 240 |
1 files changed, 240 insertions, 0 deletions
diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h new file mode 100644 index 00000000..477ef75f --- /dev/null +++ b/include/net/ip6_fib.h @@ -0,0 +1,240 @@ +/* + * 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 |