From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- include/net/fib_rules.h | 120 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 120 insertions(+) create mode 100644 include/net/fib_rules.h (limited to 'include/net/fib_rules.h') diff --git a/include/net/fib_rules.h b/include/net/fib_rules.h new file mode 100644 index 000000000..6d67383a5 --- /dev/null +++ b/include/net/fib_rules.h @@ -0,0 +1,120 @@ +#ifndef __NET_FIB_RULES_H +#define __NET_FIB_RULES_H + +#include +#include +#include +#include +#include +#include + +struct fib_rule { + struct list_head list; + int iifindex; + int oifindex; + u32 mark; + u32 mark_mask; + u32 flags; + u32 table; + u8 action; + /* 3 bytes hole, try to use */ + u32 target; + struct fib_rule __rcu *ctarget; + struct net *fr_net; + + atomic_t refcnt; + u32 pref; + int suppress_ifgroup; + int suppress_prefixlen; + char iifname[IFNAMSIZ]; + char oifname[IFNAMSIZ]; + struct rcu_head rcu; +}; + +struct fib_lookup_arg { + void *lookup_ptr; + void *result; + struct fib_rule *rule; + int flags; +#define FIB_LOOKUP_NOREF 1 +}; + +struct fib_rules_ops { + int family; + struct list_head list; + int rule_size; + int addr_size; + int unresolved_rules; + int nr_goto_rules; + + int (*action)(struct fib_rule *, + struct flowi *, int, + struct fib_lookup_arg *); + bool (*suppress)(struct fib_rule *, + struct fib_lookup_arg *); + int (*match)(struct fib_rule *, + struct flowi *, int); + int (*configure)(struct fib_rule *, + struct sk_buff *, + struct fib_rule_hdr *, + struct nlattr **); + int (*delete)(struct fib_rule *); + int (*compare)(struct fib_rule *, + struct fib_rule_hdr *, + struct nlattr **); + int (*fill)(struct fib_rule *, struct sk_buff *, + struct fib_rule_hdr *); + u32 (*default_pref)(struct fib_rules_ops *ops); + size_t (*nlmsg_payload)(struct fib_rule *); + + /* Called after modifications to the rules set, must flush + * the route cache if one exists. */ + void (*flush_cache)(struct fib_rules_ops *ops); + + int nlgroup; + const struct nla_policy *policy; + struct list_head rules_list; + struct module *owner; + struct net *fro_net; + struct rcu_head rcu; +}; + +#define FRA_GENERIC_POLICY \ + [FRA_IIFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \ + [FRA_OIFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \ + [FRA_PRIORITY] = { .type = NLA_U32 }, \ + [FRA_FWMARK] = { .type = NLA_U32 }, \ + [FRA_FWMASK] = { .type = NLA_U32 }, \ + [FRA_TABLE] = { .type = NLA_U32 }, \ + [FRA_SUPPRESS_PREFIXLEN] = { .type = NLA_U32 }, \ + [FRA_SUPPRESS_IFGROUP] = { .type = NLA_U32 }, \ + [FRA_GOTO] = { .type = NLA_U32 } + +static inline void fib_rule_get(struct fib_rule *rule) +{ + atomic_inc(&rule->refcnt); +} + +static inline void fib_rule_put(struct fib_rule *rule) +{ + if (atomic_dec_and_test(&rule->refcnt)) + kfree_rcu(rule, rcu); +} + +static inline u32 frh_get_table(struct fib_rule_hdr *frh, struct nlattr **nla) +{ + if (nla[FRA_TABLE]) + return nla_get_u32(nla[FRA_TABLE]); + return frh->table; +} + +struct fib_rules_ops *fib_rules_register(const struct fib_rules_ops *, + struct net *); +void fib_rules_unregister(struct fib_rules_ops *); + +int fib_rules_lookup(struct fib_rules_ops *, struct flowi *, int flags, + struct fib_lookup_arg *); +int fib_default_rule_add(struct fib_rules_ops *, u32 pref, u32 table, + u32 flags); +u32 fib_default_rule_pref(struct fib_rules_ops *ops); +#endif -- cgit v1.2.3-54-g00ecf