LXR linux/include/net/dn

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