include/net/dn_fib.h

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