include/net/dn_fib.h

   1 #ifndef _NET_DN_FIB_H
   2 #define _NET_DN_FIB_H
   3
   4 #include <linux/netlink.h>
   5
   6 extern const struct nla_policy rtm_dn_policy[];
   7
   8 struct 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
  17 struct 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
  27 struct 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
  53 typedef struct {
  54         __le16  datum;
  55 } dn_fib_key_t;
  56
  57 typedef struct {
  58         __le16  datum;
  59 } dn_fib_hash_t;
  60
  61 typedef struct {
  62         __u16   datum;
  63 } dn_fib_idx_t;
  64
  65 struct 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
  76 struct 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  */
  98 extern void dn_fib_init(void);
  99 extern void dn_fib_cleanup(void);
 100
 101 extern int dn_fib_ioctl(struct socket *sock, unsigned int cmd,
 102                         unsigned long arg);
 103 extern struct dn_fib_info *dn_fib_create_info(const struct rtmsg *r,
 104                                 struct nlattr *attrs[],
 105                                 const struct nlmsghdr *nlh, int *errp);
 106 extern int dn_fib_semantic_match(int type, struct dn_fib_info *fi,
 107                         const struct flowidn *fld,
 108                         struct dn_fib_res *res);
 109 extern void dn_fib_release_info(struct dn_fib_info *fi);
 110 extern void dn_fib_flush(void);
 111 extern void dn_fib_select_multipath(const struct flowidn *fld,
 112                                         struct dn_fib_res *res);
 113
 114 /*
 115  * dn_tables.c
 116  */
 117 extern struct dn_fib_table *dn_fib_get_table(u32 n, int creat);
 118 extern struct dn_fib_table *dn_fib_empty_table(void);
 119 extern void dn_fib_table_init(void);
 120 extern void dn_fib_table_cleanup(void);
 121
 122 /*
 123  * dn_rules.c
 124  */
 125 extern void dn_fib_rules_init(void);
 126 extern void dn_fib_rules_cleanup(void);
 127 extern unsigned int dnet_addr_type(__le16 addr);
 128 extern int dn_fib_lookup(struct flowidn *fld, struct dn_fib_res *res);
 129
 130 extern int dn_fib_dump(struct sk_buff *skb, struct netlink_callback *cb);
 131
 132 extern void dn_fib_free_info(struct dn_fib_info *fi);
 133
 134 static 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
 140 static 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
 161 static 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 */