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 void dn_fib_init(void);
  99 void dn_fib_cleanup(void);
 100
 101 int dn_fib_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
 102 struct dn_fib_info *dn_fib_create_info(const struct rtmsg *r,
 103                                        struct nlattr *attrs[],
 104                                        const struct nlmsghdr *nlh, int *errp);
 105 int dn_fib_semantic_match(int type, struct dn_fib_info *fi,
 106                           const struct flowidn *fld, struct dn_fib_res *res);
 107 void dn_fib_release_info(struct dn_fib_info *fi);
 108 void dn_fib_flush(void);
 109 void dn_fib_select_multipath(const struct flowidn *fld, struct dn_fib_res *res);
 110
 111 /*
 112  * dn_tables.c
 113  */
 114 struct dn_fib_table *dn_fib_get_table(u32 n, int creat);
 115 struct dn_fib_table *dn_fib_empty_table(void);
 116 void dn_fib_table_init(void);
 117 void dn_fib_table_cleanup(void);
 118
 119 /*
 120  * dn_rules.c
 121  */
 122 void dn_fib_rules_init(void);
 123 void dn_fib_rules_cleanup(void);
 124 unsigned int dnet_addr_type(__le16 addr);
 125 int dn_fib_lookup(struct flowidn *fld, struct dn_fib_res *res);
 126
 127 int dn_fib_dump(struct sk_buff *skb, struct netlink_callback *cb);
 128
 129 void dn_fib_free_info(struct dn_fib_info *fi);
 130
 131 static 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
 137 static 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
 158 static 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 */