linux/include/net/dn_fib.h
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   1#ifndef _NET_DN_FIB_H
   2#define _NET_DN_FIB_H
   3
   4/* WARNING: The ordering of these elements must match ordering
   5 *          of RTA_* rtnetlink attribute numbers.
   6 */
   7struct dn_kern_rta {
   8        void            *rta_dst;
   9        void            *rta_src;
  10        int             *rta_iif;
  11        int             *rta_oif;
  12        void            *rta_gw;
  13        u32             *rta_priority;
  14        void            *rta_prefsrc;
  15        struct rtattr   *rta_mx;
  16        struct rtattr   *rta_mp;
  17        unsigned char   *rta_protoinfo;
  18        u32             *rta_flow;
  19        struct rta_cacheinfo *rta_ci;
  20        struct rta_session *rta_sess;
  21};
  22
  23struct dn_fib_res {
  24        struct fib_rule *r;
  25        struct dn_fib_info *fi;
  26        unsigned char prefixlen;
  27        unsigned char nh_sel;
  28        unsigned char type;
  29        unsigned char scope;
  30};
  31
  32struct dn_fib_nh {
  33        struct net_device       *nh_dev;
  34        unsigned int            nh_flags;
  35        unsigned char           nh_scope;
  36        int                     nh_weight;
  37        int                     nh_power;
  38        int                     nh_oif;
  39        __le16                  nh_gw;
  40};
  41
  42struct dn_fib_info {
  43        struct dn_fib_info      *fib_next;
  44        struct dn_fib_info      *fib_prev;
  45        int                     fib_treeref;
  46        atomic_t                fib_clntref;
  47        int                     fib_dead;
  48        unsigned int            fib_flags;
  49        int                     fib_protocol;
  50        __le16                  fib_prefsrc;
  51        __u32                   fib_priority;
  52        __u32                   fib_metrics[RTAX_MAX];
  53        int                     fib_nhs;
  54        int                     fib_power;
  55        struct dn_fib_nh        fib_nh[0];
  56#define dn_fib_dev              fib_nh[0].nh_dev
  57};
  58
  59
  60#define DN_FIB_RES_RESET(res)   ((res).nh_sel = 0)
  61#define DN_FIB_RES_NH(res)      ((res).fi->fib_nh[(res).nh_sel])
  62
  63#define DN_FIB_RES_PREFSRC(res) ((res).fi->fib_prefsrc ? : __dn_fib_res_prefsrc(&res))
  64#define DN_FIB_RES_GW(res)      (DN_FIB_RES_NH(res).nh_gw)
  65#define DN_FIB_RES_DEV(res)     (DN_FIB_RES_NH(res).nh_dev)
  66#define DN_FIB_RES_OIF(res)     (DN_FIB_RES_NH(res).nh_oif)
  67
  68typedef struct {
  69        __le16  datum;
  70} dn_fib_key_t;
  71
  72typedef struct {
  73        __le16  datum;
  74} dn_fib_hash_t;
  75
  76typedef struct {
  77        __u16   datum;
  78} dn_fib_idx_t;
  79
  80struct dn_fib_node {
  81        struct dn_fib_node *fn_next;
  82        struct dn_fib_info *fn_info;
  83#define DN_FIB_INFO(f) ((f)->fn_info)
  84        dn_fib_key_t    fn_key;
  85        u8              fn_type;
  86        u8              fn_scope;
  87        u8              fn_state;
  88};
  89
  90
  91struct dn_fib_table {
  92        struct hlist_node hlist;
  93        u32 n;
  94
  95        int (*insert)(struct dn_fib_table *t, struct rtmsg *r, 
  96                        struct dn_kern_rta *rta, struct nlmsghdr *n, 
  97                        struct netlink_skb_parms *req);
  98        int (*delete)(struct dn_fib_table *t, struct rtmsg *r,
  99                        struct dn_kern_rta *rta, struct nlmsghdr *n,
 100                        struct netlink_skb_parms *req);
 101        int (*lookup)(struct dn_fib_table *t, const struct flowidn *fld,
 102                        struct dn_fib_res *res);
 103        int (*flush)(struct dn_fib_table *t);
 104        int (*dump)(struct dn_fib_table *t, struct sk_buff *skb, struct netlink_callback *cb);
 105
 106        unsigned char data[0];
 107};
 108
 109#ifdef CONFIG_DECNET_ROUTER
 110/*
 111 * dn_fib.c
 112 */
 113extern void dn_fib_init(void);
 114extern void dn_fib_cleanup(void);
 115
 116extern int dn_fib_ioctl(struct socket *sock, unsigned int cmd, 
 117                        unsigned long arg);
 118extern struct dn_fib_info *dn_fib_create_info(const struct rtmsg *r, 
 119                                struct dn_kern_rta *rta, 
 120                                const struct nlmsghdr *nlh, int *errp);
 121extern int dn_fib_semantic_match(int type, struct dn_fib_info *fi, 
 122                        const struct flowidn *fld,
 123                        struct dn_fib_res *res);
 124extern void dn_fib_release_info(struct dn_fib_info *fi);
 125extern __le16 dn_fib_get_attr16(struct rtattr *attr, int attrlen, int type);
 126extern void dn_fib_flush(void);
 127extern void dn_fib_select_multipath(const struct flowidn *fld,
 128                                        struct dn_fib_res *res);
 129
 130/*
 131 * dn_tables.c
 132 */
 133extern struct dn_fib_table *dn_fib_get_table(u32 n, int creat);
 134extern struct dn_fib_table *dn_fib_empty_table(void);
 135extern void dn_fib_table_init(void);
 136extern void dn_fib_table_cleanup(void);
 137
 138/*
 139 * dn_rules.c
 140 */
 141extern void dn_fib_rules_init(void);
 142extern void dn_fib_rules_cleanup(void);
 143extern unsigned int dnet_addr_type(__le16 addr);
 144extern int dn_fib_lookup(struct flowidn *fld, struct dn_fib_res *res);
 145
 146extern int dn_fib_dump(struct sk_buff *skb, struct netlink_callback *cb);
 147
 148extern void dn_fib_free_info(struct dn_fib_info *fi);
 149
 150static inline void dn_fib_info_put(struct dn_fib_info *fi)
 151{
 152        if (atomic_dec_and_test(&fi->fib_clntref))
 153                dn_fib_free_info(fi);
 154}
 155
 156static inline void dn_fib_res_put(struct dn_fib_res *res)
 157{
 158        if (res->fi)
 159                dn_fib_info_put(res->fi);
 160        if (res->r)
 161                fib_rule_put(res->r);
 162}
 163
 164#else /* Endnode */
 165
 166#define dn_fib_init()  do { } while(0)
 167#define dn_fib_cleanup() do { } while(0)
 168
 169#define dn_fib_lookup(fl, res) (-ESRCH)
 170#define dn_fib_info_put(fi) do { } while(0)
 171#define dn_fib_select_multipath(fl, res) do { } while(0)
 172#define dn_fib_rules_policy(saddr,res,flags) (0)
 173#define dn_fib_res_put(res) do { } while(0)
 174
 175#endif /* CONFIG_DECNET_ROUTER */
 176
 177static inline __le16 dnet_make_mask(int n)
 178{
 179        if (n)
 180                return cpu_to_le16(~((1 << (16 - n)) - 1));
 181        return cpu_to_le16(0);
 182}
 183
 184#endif /* _NET_DN_FIB_H */
 185
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