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 */
  98void dn_fib_init(void);
  99void dn_fib_cleanup(void);
 100
 101int dn_fib_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
 102struct dn_fib_info *dn_fib_create_info(const struct rtmsg *r,
 103                                       struct nlattr *attrs[],
 104                                       const struct nlmsghdr *nlh, int *errp);
 105int dn_fib_semantic_match(int type, struct dn_fib_info *fi,
 106                          const struct flowidn *fld, struct dn_fib_res *res);
 107void dn_fib_release_info(struct dn_fib_info *fi);
 108void dn_fib_flush(void);
 109void dn_fib_select_multipath(const struct flowidn *fld, struct dn_fib_res *res);
 110
 111/*
 112 * dn_tables.c
 113 */
 114struct dn_fib_table *dn_fib_get_table(u32 n, int creat);
 115struct dn_fib_table *dn_fib_empty_table(void);
 116void dn_fib_table_init(void);
 117void dn_fib_table_cleanup(void);
 118
 119/*
 120 * dn_rules.c
 121 */
 122void dn_fib_rules_init(void);
 123void dn_fib_rules_cleanup(void);
 124unsigned int dnet_addr_type(__le16 addr);
 125int dn_fib_lookup(struct flowidn *fld, struct dn_fib_res *res);
 126
 127int dn_fib_dump(struct sk_buff *skb, struct netlink_callback *cb);
 128
 129void dn_fib_free_info(struct dn_fib_info *fi);
 130
 131static inline void dn_fib_info_put(struct dn_fib_info *fi)
 132{
 133        if (atomic_dec_and_test(&fi->fib_clntref))
 134                dn_fib_free_info(fi);
 135}
 136
 137static inline void dn_fib_res_put(struct dn_fib_res *res)
 138{
 139        if (res->fi)
 140                dn_fib_info_put(res->fi);
 141        if (res->r)
 142                fib_rule_put(res->r);
 143}
 144
 145#else /* Endnode */
 146
 147#define dn_fib_init()  do { } while(0)
 148#define dn_fib_cleanup() do { } while(0)
 149
 150#define dn_fib_lookup(fl, res) (-ESRCH)
 151#define dn_fib_info_put(fi) do { } while(0)
 152#define dn_fib_select_multipath(fl, res) do { } while(0)
 153#define dn_fib_rules_policy(saddr,res,flags) (0)
 154#define dn_fib_res_put(res) do { } while(0)
 155
 156#endif /* CONFIG_DECNET_ROUTER */
 157
 158static inline __le16 dnet_make_mask(int n)
 159{
 160        if (n)
 161                return cpu_to_le16(~((1 << (16 - n)) - 1));
 162        return cpu_to_le16(0);
 163}
 164
 165#endif /* _NET_DN_FIB_H */
 166