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-rw-r--r--include/net/ip6_fib.h288
1 files changed, 288 insertions, 0 deletions
diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h
new file mode 100644
index 00000000..0ae759a6
--- /dev/null
+++ b/include/net/ip6_fib.h
@@ -0,0 +1,288 @@
+/*
+ * 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;
+
+ /*
+ * 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;
+}
+
+static inline void rt6_clean_expires(struct rt6_info *rt)
+{
+ if (!(rt->rt6i_flags & RTF_EXPIRES) && rt->dst.from)
+ dst_release(rt->dst.from);
+
+ rt->rt6i_flags &= ~RTF_EXPIRES;
+ rt->dst.from = NULL;
+}
+
+static inline void rt6_set_expires(struct rt6_info *rt, unsigned long expires)
+{
+ if (!(rt->rt6i_flags & RTF_EXPIRES) && rt->dst.from)
+ dst_release(rt->dst.from);
+
+ rt->rt6i_flags |= RTF_EXPIRES;
+ rt->dst.expires = expires;
+}
+
+static inline void rt6_update_expires(struct rt6_info *rt, int timeout)
+{
+ if (!(rt->rt6i_flags & RTF_EXPIRES)) {
+ if (rt->dst.from)
+ dst_release(rt->dst.from);
+ /* dst_set_expires relies on expires == 0
+ * if it has not been set previously.
+ */
+ rt->dst.expires = 0;
+ }
+
+ dst_set_expires(&rt->dst, timeout);
+ rt->rt6i_flags |= RTF_EXPIRES;
+}
+
+static inline void rt6_set_from(struct rt6_info *rt, struct rt6_info *from)
+{
+ struct dst_entry *new = (struct dst_entry *) from;
+
+ if (!(rt->rt6i_flags & RTF_EXPIRES) && rt->dst.from) {
+ if (new == rt->dst.from)
+ return;
+ dst_release(rt->dst.from);
+ }
+
+ rt->rt6i_flags &= ~RTF_EXPIRES;
+ rt->dst.from = new;
+ dst_hold(new);
+}
+
+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_ro(struct net *net,
+ int (*func)(struct rt6_info *, void *arg),
+ int prune, void *arg);
+
+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
generated by cgit (git 2.34.1) at 2024-12-20 08:42:56 +0000