| /* |
| * 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 |
| |
| #ifdef __KERNEL__ |
| |
| #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 |
| #endif |