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14c0b97d TG |
1 | #ifndef __NET_FIB_RULES_H |
2 | #define __NET_FIB_RULES_H | |
3 | ||
4 | #include <linux/types.h> | |
5a0e3ad6 | 5 | #include <linux/slab.h> |
14c0b97d TG |
6 | #include <linux/netdevice.h> |
7 | #include <linux/fib_rules.h> | |
8 | #include <net/flow.h> | |
9d9e6a58 | 9 | #include <net/rtnetlink.h> |
14c0b97d | 10 | |
fd2c3ef7 | 11 | struct fib_rule { |
14c0b97d | 12 | struct list_head list; |
491deb24 | 13 | int iifindex; |
1b038a5e | 14 | int oifindex; |
b8964ed9 TG |
15 | u32 mark; |
16 | u32 mark_mask; | |
14c0b97d TG |
17 | u32 flags; |
18 | u32 table; | |
19 | u8 action; | |
fba3679d | 20 | /* 3 bytes hole, try to use */ |
0947c9fe | 21 | u32 target; |
7a2b03c5 | 22 | struct fib_rule __rcu *ctarget; |
fba3679d ED |
23 | struct net *fr_net; |
24 | ||
25 | atomic_t refcnt; | |
26 | u32 pref; | |
27 | int suppress_ifgroup; | |
28 | int suppress_prefixlen; | |
491deb24 | 29 | char iifname[IFNAMSIZ]; |
1b038a5e | 30 | char oifname[IFNAMSIZ]; |
14c0b97d TG |
31 | struct rcu_head rcu; |
32 | }; | |
33 | ||
fd2c3ef7 | 34 | struct fib_lookup_arg { |
14c0b97d TG |
35 | void *lookup_ptr; |
36 | void *result; | |
37 | struct fib_rule *rule; | |
ebc0ffae ED |
38 | int flags; |
39 | #define FIB_LOOKUP_NOREF 1 | |
14c0b97d TG |
40 | }; |
41 | ||
fd2c3ef7 | 42 | struct fib_rules_ops { |
14c0b97d TG |
43 | int family; |
44 | struct list_head list; | |
45 | int rule_size; | |
e1701c68 | 46 | int addr_size; |
0947c9fe TG |
47 | int unresolved_rules; |
48 | int nr_goto_rules; | |
14c0b97d TG |
49 | |
50 | int (*action)(struct fib_rule *, | |
51 | struct flowi *, int, | |
52 | struct fib_lookup_arg *); | |
7764a45a ST |
53 | bool (*suppress)(struct fib_rule *, |
54 | struct fib_lookup_arg *); | |
14c0b97d TG |
55 | int (*match)(struct fib_rule *, |
56 | struct flowi *, int); | |
57 | int (*configure)(struct fib_rule *, | |
58 | struct sk_buff *, | |
14c0b97d TG |
59 | struct fib_rule_hdr *, |
60 | struct nlattr **); | |
0ddcf43d | 61 | int (*delete)(struct fib_rule *); |
14c0b97d TG |
62 | int (*compare)(struct fib_rule *, |
63 | struct fib_rule_hdr *, | |
64 | struct nlattr **); | |
65 | int (*fill)(struct fib_rule *, struct sk_buff *, | |
14c0b97d | 66 | struct fib_rule_hdr *); |
868d13ac | 67 | u32 (*default_pref)(struct fib_rules_ops *ops); |
339bf98f | 68 | size_t (*nlmsg_payload)(struct fib_rule *); |
14c0b97d | 69 | |
73417f61 TG |
70 | /* Called after modifications to the rules set, must flush |
71 | * the route cache if one exists. */ | |
ae299fc0 | 72 | void (*flush_cache)(struct fib_rules_ops *ops); |
73417f61 | 73 | |
14c0b97d | 74 | int nlgroup; |
ef7c79ed | 75 | const struct nla_policy *policy; |
76c72d4f | 76 | struct list_head rules_list; |
14c0b97d | 77 | struct module *owner; |
03592383 | 78 | struct net *fro_net; |
e9c5158a | 79 | struct rcu_head rcu; |
14c0b97d TG |
80 | }; |
81 | ||
1f6c9557 | 82 | #define FRA_GENERIC_POLICY \ |
491deb24 | 83 | [FRA_IIFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \ |
1b038a5e | 84 | [FRA_OIFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \ |
1f6c9557 TG |
85 | [FRA_PRIORITY] = { .type = NLA_U32 }, \ |
86 | [FRA_FWMARK] = { .type = NLA_U32 }, \ | |
87 | [FRA_FWMASK] = { .type = NLA_U32 }, \ | |
0947c9fe | 88 | [FRA_TABLE] = { .type = NLA_U32 }, \ |
73f5698e | 89 | [FRA_SUPPRESS_PREFIXLEN] = { .type = NLA_U32 }, \ |
6ef94cfa | 90 | [FRA_SUPPRESS_IFGROUP] = { .type = NLA_U32 }, \ |
0947c9fe | 91 | [FRA_GOTO] = { .type = NLA_U32 } |
1f6c9557 | 92 | |
14c0b97d TG |
93 | static inline void fib_rule_get(struct fib_rule *rule) |
94 | { | |
95 | atomic_inc(&rule->refcnt); | |
96 | } | |
97 | ||
14c0b97d TG |
98 | static inline void fib_rule_put(struct fib_rule *rule) |
99 | { | |
100 | if (atomic_dec_and_test(&rule->refcnt)) | |
efd7ef1c | 101 | kfree_rcu(rule, rcu); |
14c0b97d TG |
102 | } |
103 | ||
9e762a4a PM |
104 | static inline u32 frh_get_table(struct fib_rule_hdr *frh, struct nlattr **nla) |
105 | { | |
106 | if (nla[FRA_TABLE]) | |
107 | return nla_get_u32(nla[FRA_TABLE]); | |
108 | return frh->table; | |
109 | } | |
110 | ||
8de6879f JP |
111 | struct fib_rules_ops *fib_rules_register(const struct fib_rules_ops *, |
112 | struct net *); | |
113 | void fib_rules_unregister(struct fib_rules_ops *); | |
14c0b97d | 114 | |
8de6879f JP |
115 | int fib_rules_lookup(struct fib_rules_ops *, struct flowi *, int flags, |
116 | struct fib_lookup_arg *); | |
117 | int fib_default_rule_add(struct fib_rules_ops *, u32 pref, u32 table, | |
118 | u32 flags); | |
119 | u32 fib_default_rule_pref(struct fib_rules_ops *ops); | |
14c0b97d | 120 | #endif |