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Linux/include/net/dn_fib.h

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  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 */
166 

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