13b49e2e9SPablo Neira Ayuso #ifndef _NF_FLOW_TABLE_H 23b49e2e9SPablo Neira Ayuso #define _NF_FLOW_TABLE_H 33b49e2e9SPablo Neira Ayuso 4ac2a6666SPablo Neira Ayuso #include <linux/in.h> 5ac2a6666SPablo Neira Ayuso #include <linux/in6.h> 6ac2a6666SPablo Neira Ayuso #include <linux/netdevice.h> 70eb71a9dSNeilBrown #include <linux/rhashtable-types.h> 8ac2a6666SPablo Neira Ayuso #include <linux/rcupdate.h> 9a1b2f04eSJeremy Sowden #include <linux/netfilter.h> 10af81f9e7SFelix Fietkau #include <linux/netfilter/nf_conntrack_tuple_common.h> 118bb69f3bSPablo Neira Ayuso #include <net/flow_offload.h> 12ac2a6666SPablo Neira Ayuso #include <net/dst.h> 133b49e2e9SPablo Neira Ayuso 143b49e2e9SPablo Neira Ayuso struct nf_flowtable; 15c29f74e0SPablo Neira Ayuso struct nf_flow_rule; 16c29f74e0SPablo Neira Ayuso struct flow_offload; 17c29f74e0SPablo Neira Ayuso enum flow_offload_tuple_dir; 183b49e2e9SPablo Neira Ayuso 193b49e2e9SPablo Neira Ayuso struct nf_flowtable_type { 203b49e2e9SPablo Neira Ayuso struct list_head list; 213b49e2e9SPablo Neira Ayuso int family; 22a268de77SFelix Fietkau int (*init)(struct nf_flowtable *ft); 238bb69f3bSPablo Neira Ayuso int (*setup)(struct nf_flowtable *ft, 248bb69f3bSPablo Neira Ayuso struct net_device *dev, 258bb69f3bSPablo Neira Ayuso enum flow_block_command cmd); 26c29f74e0SPablo Neira Ayuso int (*action)(struct net *net, 27c29f74e0SPablo Neira Ayuso const struct flow_offload *flow, 28c29f74e0SPablo Neira Ayuso enum flow_offload_tuple_dir dir, 29c29f74e0SPablo Neira Ayuso struct nf_flow_rule *flow_rule); 30b408c5b0SPablo Neira Ayuso void (*free)(struct nf_flowtable *ft); 313b49e2e9SPablo Neira Ayuso nf_hookfn *hook; 323b49e2e9SPablo Neira Ayuso struct module *owner; 333b49e2e9SPablo Neira Ayuso }; 343b49e2e9SPablo Neira Ayuso 358bb69f3bSPablo Neira Ayuso enum nf_flowtable_flags { 368bb69f3bSPablo Neira Ayuso NF_FLOWTABLE_HW_OFFLOAD = 0x1, 378bb69f3bSPablo Neira Ayuso }; 388bb69f3bSPablo Neira Ayuso 393b49e2e9SPablo Neira Ayuso struct nf_flowtable { 4084453a90SFelix Fietkau struct list_head list; 413b49e2e9SPablo Neira Ayuso struct rhashtable rhashtable; 4271a8a63bSPablo Neira Ayuso int priority; 433b49e2e9SPablo Neira Ayuso const struct nf_flowtable_type *type; 443b49e2e9SPablo Neira Ayuso struct delayed_work gc_work; 458bb69f3bSPablo Neira Ayuso unsigned int flags; 468bb69f3bSPablo Neira Ayuso struct flow_block flow_block; 478bb69f3bSPablo Neira Ayuso possible_net_t net; 483b49e2e9SPablo Neira Ayuso }; 493b49e2e9SPablo Neira Ayuso 50ac2a6666SPablo Neira Ayuso enum flow_offload_tuple_dir { 51af81f9e7SFelix Fietkau FLOW_OFFLOAD_DIR_ORIGINAL = IP_CT_DIR_ORIGINAL, 52af81f9e7SFelix Fietkau FLOW_OFFLOAD_DIR_REPLY = IP_CT_DIR_REPLY, 53af81f9e7SFelix Fietkau FLOW_OFFLOAD_DIR_MAX = IP_CT_DIR_MAX 54ac2a6666SPablo Neira Ayuso }; 55ac2a6666SPablo Neira Ayuso 56ac2a6666SPablo Neira Ayuso struct flow_offload_tuple { 57ac2a6666SPablo Neira Ayuso union { 58ac2a6666SPablo Neira Ayuso struct in_addr src_v4; 59ac2a6666SPablo Neira Ayuso struct in6_addr src_v6; 60ac2a6666SPablo Neira Ayuso }; 61ac2a6666SPablo Neira Ayuso union { 62ac2a6666SPablo Neira Ayuso struct in_addr dst_v4; 63ac2a6666SPablo Neira Ayuso struct in6_addr dst_v6; 64ac2a6666SPablo Neira Ayuso }; 65ac2a6666SPablo Neira Ayuso struct { 66ac2a6666SPablo Neira Ayuso __be16 src_port; 67ac2a6666SPablo Neira Ayuso __be16 dst_port; 68ac2a6666SPablo Neira Ayuso }; 69ac2a6666SPablo Neira Ayuso 70ac2a6666SPablo Neira Ayuso int iifidx; 71ac2a6666SPablo Neira Ayuso 72ac2a6666SPablo Neira Ayuso u8 l3proto; 73ac2a6666SPablo Neira Ayuso u8 l4proto; 74ac2a6666SPablo Neira Ayuso u8 dir; 75ac2a6666SPablo Neira Ayuso 764f3780c0SFelix Fietkau u16 mtu; 774f3780c0SFelix Fietkau 78ac2a6666SPablo Neira Ayuso struct dst_entry *dst_cache; 79ac2a6666SPablo Neira Ayuso }; 80ac2a6666SPablo Neira Ayuso 81ac2a6666SPablo Neira Ayuso struct flow_offload_tuple_rhash { 82ac2a6666SPablo Neira Ayuso struct rhash_head node; 83ac2a6666SPablo Neira Ayuso struct flow_offload_tuple tuple; 84ac2a6666SPablo Neira Ayuso }; 85ac2a6666SPablo Neira Ayuso 86ac2a6666SPablo Neira Ayuso #define FLOW_OFFLOAD_SNAT 0x1 87ac2a6666SPablo Neira Ayuso #define FLOW_OFFLOAD_DNAT 0x2 88ac2a6666SPablo Neira Ayuso #define FLOW_OFFLOAD_DYING 0x4 8959c466ddSFelix Fietkau #define FLOW_OFFLOAD_TEARDOWN 0x8 90c29f74e0SPablo Neira Ayuso #define FLOW_OFFLOAD_HW 0x10 91c29f74e0SPablo Neira Ayuso #define FLOW_OFFLOAD_HW_DYING 0x20 92c29f74e0SPablo Neira Ayuso #define FLOW_OFFLOAD_HW_DEAD 0x40 93ac2a6666SPablo Neira Ayuso 94f1363e05SPablo Neira Ayuso enum flow_offload_type { 95f1363e05SPablo Neira Ayuso NF_FLOW_OFFLOAD_UNSPEC = 0, 96f1363e05SPablo Neira Ayuso NF_FLOW_OFFLOAD_ROUTE, 97f1363e05SPablo Neira Ayuso }; 98f1363e05SPablo Neira Ayuso 99ac2a6666SPablo Neira Ayuso struct flow_offload { 100ac2a6666SPablo Neira Ayuso struct flow_offload_tuple_rhash tuplehash[FLOW_OFFLOAD_DIR_MAX]; 101b32d2f34SPablo Neira Ayuso struct nf_conn *ct; 102f1363e05SPablo Neira Ayuso u16 flags; 103f1363e05SPablo Neira Ayuso u16 type; 104ac2a6666SPablo Neira Ayuso u32 timeout; 10562248df8SPablo Neira Ayuso struct rcu_head rcu_head; 106ac2a6666SPablo Neira Ayuso }; 107ac2a6666SPablo Neira Ayuso 108ac2a6666SPablo Neira Ayuso #define NF_FLOW_TIMEOUT (30 * HZ) 109ac2a6666SPablo Neira Ayuso 110ac2a6666SPablo Neira Ayuso struct nf_flow_route { 111ac2a6666SPablo Neira Ayuso struct { 112ac2a6666SPablo Neira Ayuso struct dst_entry *dst; 113ac2a6666SPablo Neira Ayuso } tuple[FLOW_OFFLOAD_DIR_MAX]; 114ac2a6666SPablo Neira Ayuso }; 115ac2a6666SPablo Neira Ayuso 116f1363e05SPablo Neira Ayuso struct flow_offload *flow_offload_alloc(struct nf_conn *ct); 117ac2a6666SPablo Neira Ayuso void flow_offload_free(struct flow_offload *flow); 118ac2a6666SPablo Neira Ayuso 119f1363e05SPablo Neira Ayuso int flow_offload_route_init(struct flow_offload *flow, 120f1363e05SPablo Neira Ayuso const struct nf_flow_route *route); 121f1363e05SPablo Neira Ayuso 122ac2a6666SPablo Neira Ayuso int flow_offload_add(struct nf_flowtable *flow_table, struct flow_offload *flow); 123ac2a6666SPablo Neira Ayuso struct flow_offload_tuple_rhash *flow_offload_lookup(struct nf_flowtable *flow_table, 124ac2a6666SPablo Neira Ayuso struct flow_offload_tuple *tuple); 1255f1be84aSTaehee Yoo void nf_flow_table_cleanup(struct net_device *dev); 126c0ea1bcbSPablo Neira Ayuso 127a268de77SFelix Fietkau int nf_flow_table_init(struct nf_flowtable *flow_table); 128b408c5b0SPablo Neira Ayuso void nf_flow_table_free(struct nf_flowtable *flow_table); 129ac2a6666SPablo Neira Ayuso 13059c466ddSFelix Fietkau void flow_offload_teardown(struct flow_offload *flow); 1316bdc3c68SFelix Fietkau static inline void flow_offload_dead(struct flow_offload *flow) 1326bdc3c68SFelix Fietkau { 1336bdc3c68SFelix Fietkau flow->flags |= FLOW_OFFLOAD_DYING; 1346bdc3c68SFelix Fietkau } 135ac2a6666SPablo Neira Ayuso 136ac2a6666SPablo Neira Ayuso int nf_flow_snat_port(const struct flow_offload *flow, 137ac2a6666SPablo Neira Ayuso struct sk_buff *skb, unsigned int thoff, 138ac2a6666SPablo Neira Ayuso u8 protocol, enum flow_offload_tuple_dir dir); 139ac2a6666SPablo Neira Ayuso int nf_flow_dnat_port(const struct flow_offload *flow, 140ac2a6666SPablo Neira Ayuso struct sk_buff *skb, unsigned int thoff, 141ac2a6666SPablo Neira Ayuso u8 protocol, enum flow_offload_tuple_dir dir); 142ac2a6666SPablo Neira Ayuso 143ac2a6666SPablo Neira Ayuso struct flow_ports { 144ac2a6666SPablo Neira Ayuso __be16 source, dest; 145ac2a6666SPablo Neira Ayuso }; 146ac2a6666SPablo Neira Ayuso 1477c23b629SPablo Neira Ayuso unsigned int nf_flow_offload_ip_hook(void *priv, struct sk_buff *skb, 1487c23b629SPablo Neira Ayuso const struct nf_hook_state *state); 1497c23b629SPablo Neira Ayuso unsigned int nf_flow_offload_ipv6_hook(void *priv, struct sk_buff *skb, 1507c23b629SPablo Neira Ayuso const struct nf_hook_state *state); 1517c23b629SPablo Neira Ayuso 152ac2a6666SPablo Neira Ayuso #define MODULE_ALIAS_NF_FLOWTABLE(family) \ 153ac2a6666SPablo Neira Ayuso MODULE_ALIAS("nf-flowtable-" __stringify(family)) 154ac2a6666SPablo Neira Ayuso 155c29f74e0SPablo Neira Ayuso void nf_flow_offload_add(struct nf_flowtable *flowtable, 156c29f74e0SPablo Neira Ayuso struct flow_offload *flow); 157c29f74e0SPablo Neira Ayuso void nf_flow_offload_del(struct nf_flowtable *flowtable, 158c29f74e0SPablo Neira Ayuso struct flow_offload *flow); 159c29f74e0SPablo Neira Ayuso void nf_flow_offload_stats(struct nf_flowtable *flowtable, 160c29f74e0SPablo Neira Ayuso struct flow_offload *flow); 161c29f74e0SPablo Neira Ayuso 162c29f74e0SPablo Neira Ayuso void nf_flow_table_offload_flush(struct nf_flowtable *flowtable); 163c29f74e0SPablo Neira Ayuso int nf_flow_table_offload_setup(struct nf_flowtable *flowtable, 1648bb69f3bSPablo Neira Ayuso struct net_device *dev, 165c29f74e0SPablo Neira Ayuso enum flow_block_command cmd); 166c29f74e0SPablo Neira Ayuso int nf_flow_rule_route(struct net *net, const struct flow_offload *flow, 167c29f74e0SPablo Neira Ayuso enum flow_offload_tuple_dir dir, 168c29f74e0SPablo Neira Ayuso struct nf_flow_rule *flow_rule); 169c29f74e0SPablo Neira Ayuso 170c29f74e0SPablo Neira Ayuso int nf_flow_table_offload_init(void); 171c29f74e0SPablo Neira Ayuso void nf_flow_table_offload_exit(void); 1728bb69f3bSPablo Neira Ayuso 1730286fbc6SJeremy Sowden #endif /* _NF_FLOW_TABLE_H */ 174