1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun #ifndef _NET_DN_FIB_H
3*4882a593Smuzhiyun #define _NET_DN_FIB_H
4*4882a593Smuzhiyun
5*4882a593Smuzhiyun #include <linux/netlink.h>
6*4882a593Smuzhiyun #include <linux/refcount.h>
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun extern const struct nla_policy rtm_dn_policy[];
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun struct dn_fib_res {
11*4882a593Smuzhiyun struct fib_rule *r;
12*4882a593Smuzhiyun struct dn_fib_info *fi;
13*4882a593Smuzhiyun unsigned char prefixlen;
14*4882a593Smuzhiyun unsigned char nh_sel;
15*4882a593Smuzhiyun unsigned char type;
16*4882a593Smuzhiyun unsigned char scope;
17*4882a593Smuzhiyun };
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun struct dn_fib_nh {
20*4882a593Smuzhiyun struct net_device *nh_dev;
21*4882a593Smuzhiyun unsigned int nh_flags;
22*4882a593Smuzhiyun unsigned char nh_scope;
23*4882a593Smuzhiyun int nh_weight;
24*4882a593Smuzhiyun int nh_power;
25*4882a593Smuzhiyun int nh_oif;
26*4882a593Smuzhiyun __le16 nh_gw;
27*4882a593Smuzhiyun };
28*4882a593Smuzhiyun
29*4882a593Smuzhiyun struct dn_fib_info {
30*4882a593Smuzhiyun struct dn_fib_info *fib_next;
31*4882a593Smuzhiyun struct dn_fib_info *fib_prev;
32*4882a593Smuzhiyun int fib_treeref;
33*4882a593Smuzhiyun refcount_t fib_clntref;
34*4882a593Smuzhiyun int fib_dead;
35*4882a593Smuzhiyun unsigned int fib_flags;
36*4882a593Smuzhiyun int fib_protocol;
37*4882a593Smuzhiyun __le16 fib_prefsrc;
38*4882a593Smuzhiyun __u32 fib_priority;
39*4882a593Smuzhiyun __u32 fib_metrics[RTAX_MAX];
40*4882a593Smuzhiyun int fib_nhs;
41*4882a593Smuzhiyun int fib_power;
42*4882a593Smuzhiyun struct dn_fib_nh fib_nh[0];
43*4882a593Smuzhiyun #define dn_fib_dev fib_nh[0].nh_dev
44*4882a593Smuzhiyun };
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun #define DN_FIB_RES_RESET(res) ((res).nh_sel = 0)
48*4882a593Smuzhiyun #define DN_FIB_RES_NH(res) ((res).fi->fib_nh[(res).nh_sel])
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun #define DN_FIB_RES_PREFSRC(res) ((res).fi->fib_prefsrc ? : __dn_fib_res_prefsrc(&res))
51*4882a593Smuzhiyun #define DN_FIB_RES_GW(res) (DN_FIB_RES_NH(res).nh_gw)
52*4882a593Smuzhiyun #define DN_FIB_RES_DEV(res) (DN_FIB_RES_NH(res).nh_dev)
53*4882a593Smuzhiyun #define DN_FIB_RES_OIF(res) (DN_FIB_RES_NH(res).nh_oif)
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun typedef struct {
56*4882a593Smuzhiyun __le16 datum;
57*4882a593Smuzhiyun } dn_fib_key_t;
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun typedef struct {
60*4882a593Smuzhiyun __le16 datum;
61*4882a593Smuzhiyun } dn_fib_hash_t;
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun typedef struct {
64*4882a593Smuzhiyun __u16 datum;
65*4882a593Smuzhiyun } dn_fib_idx_t;
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun struct dn_fib_node {
68*4882a593Smuzhiyun struct dn_fib_node *fn_next;
69*4882a593Smuzhiyun struct dn_fib_info *fn_info;
70*4882a593Smuzhiyun #define DN_FIB_INFO(f) ((f)->fn_info)
71*4882a593Smuzhiyun dn_fib_key_t fn_key;
72*4882a593Smuzhiyun u8 fn_type;
73*4882a593Smuzhiyun u8 fn_scope;
74*4882a593Smuzhiyun u8 fn_state;
75*4882a593Smuzhiyun };
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun
78*4882a593Smuzhiyun struct dn_fib_table {
79*4882a593Smuzhiyun struct hlist_node hlist;
80*4882a593Smuzhiyun u32 n;
81*4882a593Smuzhiyun
82*4882a593Smuzhiyun int (*insert)(struct dn_fib_table *t, struct rtmsg *r,
83*4882a593Smuzhiyun struct nlattr *attrs[], struct nlmsghdr *n,
84*4882a593Smuzhiyun struct netlink_skb_parms *req);
85*4882a593Smuzhiyun int (*delete)(struct dn_fib_table *t, struct rtmsg *r,
86*4882a593Smuzhiyun struct nlattr *attrs[], struct nlmsghdr *n,
87*4882a593Smuzhiyun struct netlink_skb_parms *req);
88*4882a593Smuzhiyun int (*lookup)(struct dn_fib_table *t, const struct flowidn *fld,
89*4882a593Smuzhiyun struct dn_fib_res *res);
90*4882a593Smuzhiyun int (*flush)(struct dn_fib_table *t);
91*4882a593Smuzhiyun int (*dump)(struct dn_fib_table *t, struct sk_buff *skb, struct netlink_callback *cb);
92*4882a593Smuzhiyun
93*4882a593Smuzhiyun unsigned char data[];
94*4882a593Smuzhiyun };
95*4882a593Smuzhiyun
96*4882a593Smuzhiyun #ifdef CONFIG_DECNET_ROUTER
97*4882a593Smuzhiyun /*
98*4882a593Smuzhiyun * dn_fib.c
99*4882a593Smuzhiyun */
100*4882a593Smuzhiyun void dn_fib_init(void);
101*4882a593Smuzhiyun void dn_fib_cleanup(void);
102*4882a593Smuzhiyun
103*4882a593Smuzhiyun int dn_fib_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
104*4882a593Smuzhiyun struct dn_fib_info *dn_fib_create_info(const struct rtmsg *r,
105*4882a593Smuzhiyun struct nlattr *attrs[],
106*4882a593Smuzhiyun const struct nlmsghdr *nlh, int *errp);
107*4882a593Smuzhiyun int dn_fib_semantic_match(int type, struct dn_fib_info *fi,
108*4882a593Smuzhiyun const struct flowidn *fld, struct dn_fib_res *res);
109*4882a593Smuzhiyun void dn_fib_release_info(struct dn_fib_info *fi);
110*4882a593Smuzhiyun void dn_fib_flush(void);
111*4882a593Smuzhiyun void dn_fib_select_multipath(const struct flowidn *fld, struct dn_fib_res *res);
112*4882a593Smuzhiyun
113*4882a593Smuzhiyun /*
114*4882a593Smuzhiyun * dn_tables.c
115*4882a593Smuzhiyun */
116*4882a593Smuzhiyun struct dn_fib_table *dn_fib_get_table(u32 n, int creat);
117*4882a593Smuzhiyun struct dn_fib_table *dn_fib_empty_table(void);
118*4882a593Smuzhiyun void dn_fib_table_init(void);
119*4882a593Smuzhiyun void dn_fib_table_cleanup(void);
120*4882a593Smuzhiyun
121*4882a593Smuzhiyun /*
122*4882a593Smuzhiyun * dn_rules.c
123*4882a593Smuzhiyun */
124*4882a593Smuzhiyun void dn_fib_rules_init(void);
125*4882a593Smuzhiyun void dn_fib_rules_cleanup(void);
126*4882a593Smuzhiyun unsigned int dnet_addr_type(__le16 addr);
127*4882a593Smuzhiyun int dn_fib_lookup(struct flowidn *fld, struct dn_fib_res *res);
128*4882a593Smuzhiyun
129*4882a593Smuzhiyun int dn_fib_dump(struct sk_buff *skb, struct netlink_callback *cb);
130*4882a593Smuzhiyun
131*4882a593Smuzhiyun void dn_fib_free_info(struct dn_fib_info *fi);
132*4882a593Smuzhiyun
dn_fib_info_put(struct dn_fib_info * fi)133*4882a593Smuzhiyun static inline void dn_fib_info_put(struct dn_fib_info *fi)
134*4882a593Smuzhiyun {
135*4882a593Smuzhiyun if (refcount_dec_and_test(&fi->fib_clntref))
136*4882a593Smuzhiyun dn_fib_free_info(fi);
137*4882a593Smuzhiyun }
138*4882a593Smuzhiyun
dn_fib_res_put(struct dn_fib_res * res)139*4882a593Smuzhiyun static inline void dn_fib_res_put(struct dn_fib_res *res)
140*4882a593Smuzhiyun {
141*4882a593Smuzhiyun if (res->fi)
142*4882a593Smuzhiyun dn_fib_info_put(res->fi);
143*4882a593Smuzhiyun if (res->r)
144*4882a593Smuzhiyun fib_rule_put(res->r);
145*4882a593Smuzhiyun }
146*4882a593Smuzhiyun
147*4882a593Smuzhiyun #else /* Endnode */
148*4882a593Smuzhiyun
149*4882a593Smuzhiyun #define dn_fib_init() do { } while(0)
150*4882a593Smuzhiyun #define dn_fib_cleanup() do { } while(0)
151*4882a593Smuzhiyun
152*4882a593Smuzhiyun #define dn_fib_lookup(fl, res) (-ESRCH)
153*4882a593Smuzhiyun #define dn_fib_info_put(fi) do { } while(0)
154*4882a593Smuzhiyun #define dn_fib_select_multipath(fl, res) do { } while(0)
155*4882a593Smuzhiyun #define dn_fib_rules_policy(saddr,res,flags) (0)
156*4882a593Smuzhiyun #define dn_fib_res_put(res) do { } while(0)
157*4882a593Smuzhiyun
158*4882a593Smuzhiyun #endif /* CONFIG_DECNET_ROUTER */
159*4882a593Smuzhiyun
dnet_make_mask(int n)160*4882a593Smuzhiyun static inline __le16 dnet_make_mask(int n)
161*4882a593Smuzhiyun {
162*4882a593Smuzhiyun if (n)
163*4882a593Smuzhiyun return cpu_to_le16(~((1 << (16 - n)) - 1));
164*4882a593Smuzhiyun return cpu_to_le16(0);
165*4882a593Smuzhiyun }
166*4882a593Smuzhiyun
167*4882a593Smuzhiyun #endif /* _NET_DN_FIB_H */
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