1#ifndef _NET_DN_FIB_H 2#define _NET_DN_FIB_H 3 4/* WARNING: The ordering of these elements must match ordering 5 * of RTA_* rtnetlink attribute numbers. 6 */ 7struct dn_kern_rta 8{ 9 void *rta_dst; 10 void *rta_src; 11 int *rta_iif; 12 int *rta_oif; 13 void *rta_gw; 14 u32 *rta_priority; 15 void *rta_prefsrc; 16 struct rtattr *rta_mx; 17 struct rtattr *rta_mp; 18 unsigned char *rta_protoinfo; 19 u32 *rta_flow; 20 struct rta_cacheinfo *rta_ci; 21 struct rta_session *rta_sess; 22}; 23 24struct dn_fib_res { 25 struct fib_rule *r; 26 struct dn_fib_info *fi; 27 unsigned char prefixlen; 28 unsigned char nh_sel; 29 unsigned char type; 30 unsigned char scope; 31}; 32 33struct dn_fib_nh { 34 struct net_device *nh_dev; 35 unsigned nh_flags; 36 unsigned char nh_scope; 37 int nh_weight; 38 int nh_power; 39 int nh_oif; 40 __le16 nh_gw; 41}; 42 43struct dn_fib_info { 44 struct dn_fib_info *fib_next; 45 struct dn_fib_info *fib_prev; 46 int fib_treeref; 47 atomic_t fib_clntref; 48 int fib_dead; 49 unsigned fib_flags; 50 int fib_protocol; 51 __le16 fib_prefsrc; 52 __u32 fib_priority; 53 __u32 fib_metrics[RTAX_MAX]; 54#define dn_fib_mtu fib_metrics[RTAX_MTU-1] 55#define dn_fib_window fib_metrics[RTAX_WINDOW-1] 56#define dn_fib_rtt fib_metrics[RTAX_RTT-1] 57#define dn_fib_advmss fib_metrics[RTAX_ADVMSS-1] 58 int fib_nhs; 59 int fib_power; 60 struct dn_fib_nh fib_nh[0]; 61#define dn_fib_dev fib_nh[0].nh_dev 62}; 63 64 65#define DN_FIB_RES_RESET(res) ((res).nh_sel = 0) 66#define DN_FIB_RES_NH(res) ((res).fi->fib_nh[(res).nh_sel]) 67 68#define DN_FIB_RES_PREFSRC(res) ((res).fi->fib_prefsrc ? : __dn_fib_res_prefsrc(&res)) 69#define DN_FIB_RES_GW(res) (DN_FIB_RES_NH(res).nh_gw) 70#define DN_FIB_RES_DEV(res) (DN_FIB_RES_NH(res).nh_dev) 71#define DN_FIB_RES_OIF(res) (DN_FIB_RES_NH(res).nh_oif) 72 73typedef struct { 74 __le16 datum; 75} dn_fib_key_t; 76 77typedef struct { 78 __le16 datum; 79} dn_fib_hash_t; 80 81typedef struct { 82 __u16 datum; 83} dn_fib_idx_t; 84 85struct dn_fib_node { 86 struct dn_fib_node *fn_next; 87 struct dn_fib_info *fn_info; 88#define DN_FIB_INFO(f) ((f)->fn_info) 89 dn_fib_key_t fn_key; 90 u8 fn_type; 91 u8 fn_scope; 92 u8 fn_state; 93}; 94 95 96struct dn_fib_table { 97 struct hlist_node hlist; 98 u32 n; 99 100 int (*insert)(struct dn_fib_table *t, struct rtmsg *r, 101 struct dn_kern_rta *rta, struct nlmsghdr *n, 102 struct netlink_skb_parms *req); 103 int (*delete)(struct dn_fib_table *t, struct rtmsg *r, 104 struct dn_kern_rta *rta, struct nlmsghdr *n, 105 struct netlink_skb_parms *req); 106 int (*lookup)(struct dn_fib_table *t, const struct flowi *fl, 107 struct dn_fib_res *res); 108 int (*flush)(struct dn_fib_table *t); 109 int (*dump)(struct dn_fib_table *t, struct sk_buff *skb, struct netlink_callback *cb); 110 111 unsigned char data[0]; 112}; 113 114#ifdef CONFIG_DECNET_ROUTER 115/* 116 * dn_fib.c 117 */ 118extern void dn_fib_init(void); 119extern void dn_fib_cleanup(void); 120 121extern int dn_fib_ioctl(struct socket *sock, unsigned int cmd, 122 unsigned long arg); 123extern struct dn_fib_info *dn_fib_create_info(const struct rtmsg *r, 124 struct dn_kern_rta *rta, 125 const struct nlmsghdr *nlh, int *errp); 126extern int dn_fib_semantic_match(int type, struct dn_fib_info *fi, 127 const struct flowi *fl, 128 struct dn_fib_res *res); 129extern void dn_fib_release_info(struct dn_fib_info *fi); 130extern __le16 dn_fib_get_attr16(struct rtattr *attr, int attrlen, int type); 131extern void dn_fib_flush(void); 132extern void dn_fib_select_multipath(const struct flowi *fl, 133 struct dn_fib_res *res); 134 135/* 136 * dn_tables.c 137 */ 138extern struct dn_fib_table *dn_fib_get_table(u32 n, int creat); 139extern struct dn_fib_table *dn_fib_empty_table(void); 140extern void dn_fib_table_init(void); 141extern void dn_fib_table_cleanup(void); 142 143/* 144 * dn_rules.c 145 */ 146extern void dn_fib_rules_init(void); 147extern void dn_fib_rules_cleanup(void); 148extern unsigned dnet_addr_type(__le16 addr); 149extern int dn_fib_lookup(struct flowi *fl, struct dn_fib_res *res); 150 151extern int dn_fib_dump(struct sk_buff *skb, struct netlink_callback *cb); 152 153extern void dn_fib_free_info(struct dn_fib_info *fi); 154 155static inline void dn_fib_info_put(struct dn_fib_info *fi) 156{ 157 if (atomic_dec_and_test(&fi->fib_clntref)) 158 dn_fib_free_info(fi); 159} 160 161static inline void dn_fib_res_put(struct dn_fib_res *res) 162{ 163 if (res->fi) 164 dn_fib_info_put(res->fi); 165 if (res->r) 166 fib_rule_put(res->r); 167} 168 169#else /* Endnode */ 170 171#define dn_fib_init() do { } while(0) 172#define dn_fib_cleanup() do { } while(0) 173 174#define dn_fib_lookup(fl, res) (-ESRCH) 175#define dn_fib_info_put(fi) do { } while(0) 176#define dn_fib_select_multipath(fl, res) do { } while(0) 177#define dn_fib_rules_policy(saddr,res,flags) (0) 178#define dn_fib_res_put(res) do { } while(0) 179 180#endif /* CONFIG_DECNET_ROUTER */ 181 182static inline __le16 dnet_make_mask(int n) 183{ 184 if (n) 185 return dn_htons(~((1<<(16-n))-1)); 186 return 0; 187} 188 189#endif /* _NET_DN_FIB_H */ 190