[mirror_ubuntu-jammy-kernel.git] / include / net / netfilter / nf_flow_table.h

#ifndef _NF_FLOW_TABLE_H
#define _NF_FLOW_TABLE_H

#include <linux/in.h>
#include <linux/in6.h>
#include <linux/netdevice.h>
#include <linux/rhashtable-types.h>
#include <linux/rcupdate.h>
#include <linux/netfilter.h>
#include <linux/netfilter/nf_conntrack_tuple_common.h>
#include <net/dst.h>

struct nf_flowtable;

struct nf_flowtable_type {
	struct list_head		list;
	int				family;
	int				(*init)(struct nf_flowtable *ft);
	void				(*free)(struct nf_flowtable *ft);
	nf_hookfn			*hook;
	struct module			*owner;
};

struct nf_flowtable {
	struct list_head		list;
	struct rhashtable		rhashtable;
	int				priority;
	const struct nf_flowtable_type	*type;
	struct delayed_work		gc_work;
};

enum flow_offload_tuple_dir {
	FLOW_OFFLOAD_DIR_ORIGINAL = IP_CT_DIR_ORIGINAL,
	FLOW_OFFLOAD_DIR_REPLY = IP_CT_DIR_REPLY,
	FLOW_OFFLOAD_DIR_MAX = IP_CT_DIR_MAX
};

struct flow_offload_tuple {
	union {
		struct in_addr		src_v4;
		struct in6_addr		src_v6;
	};
	union {
		struct in_addr		dst_v4;
		struct in6_addr		dst_v6;
	};
	struct {
		__be16			src_port;
		__be16			dst_port;
	};

	int				iifidx;

	u8				l3proto;
	u8				l4proto;
	u8				dir;

	u16				mtu;

	struct dst_entry		*dst_cache;
};

struct flow_offload_tuple_rhash {
	struct rhash_head		node;
	struct flow_offload_tuple	tuple;
};

#define FLOW_OFFLOAD_SNAT	0x1
#define FLOW_OFFLOAD_DNAT	0x2
#define FLOW_OFFLOAD_DYING	0x4
#define FLOW_OFFLOAD_TEARDOWN	0x8

struct flow_offload {
	struct flow_offload_tuple_rhash		tuplehash[FLOW_OFFLOAD_DIR_MAX];
	u32					flags;
	union {
		/* Your private driver data here. */
		u32		timeout;
	};
};

#define NF_FLOW_TIMEOUT (30 * HZ)

struct nf_flow_route {
	struct {
		struct dst_entry	*dst;
	} tuple[FLOW_OFFLOAD_DIR_MAX];
};

struct flow_offload *flow_offload_alloc(struct nf_conn *ct,
					struct nf_flow_route *route);
void flow_offload_free(struct flow_offload *flow);

int flow_offload_add(struct nf_flowtable *flow_table, struct flow_offload *flow);
struct flow_offload_tuple_rhash *flow_offload_lookup(struct nf_flowtable *flow_table,
						     struct flow_offload_tuple *tuple);
void nf_flow_table_cleanup(struct net_device *dev);

int nf_flow_table_init(struct nf_flowtable *flow_table);
void nf_flow_table_free(struct nf_flowtable *flow_table);

void flow_offload_teardown(struct flow_offload *flow);
static inline void flow_offload_dead(struct flow_offload *flow)
{
	flow->flags |= FLOW_OFFLOAD_DYING;
}

int nf_flow_snat_port(const struct flow_offload *flow,
		      struct sk_buff *skb, unsigned int thoff,
		      u8 protocol, enum flow_offload_tuple_dir dir);
int nf_flow_dnat_port(const struct flow_offload *flow,
		      struct sk_buff *skb, unsigned int thoff,
		      u8 protocol, enum flow_offload_tuple_dir dir);

struct flow_ports {
	__be16 source, dest;
};

unsigned int nf_flow_offload_ip_hook(void *priv, struct sk_buff *skb,
				     const struct nf_hook_state *state);
unsigned int nf_flow_offload_ipv6_hook(void *priv, struct sk_buff *skb,
				       const struct nf_hook_state *state);

#define MODULE_ALIAS_NF_FLOWTABLE(family)	\
	MODULE_ALIAS("nf-flowtable-" __stringify(family))

#endif /* _NF_FLOW_TABLE_H */
Commit	Line	Data
3b49e2e9 PNA	1	#ifndef _NF_FLOW_TABLE_H
	2	#define _NF_FLOW_TABLE_H
	3
ac2a6666 PNA	4	#include <linux/in.h>
	5	#include <linux/in6.h>
	6	#include <linux/netdevice.h>
0eb71a9d	7	#include <linux/rhashtable-types.h>
ac2a6666	8	#include <linux/rcupdate.h>
a1b2f04e	9	#include <linux/netfilter.h>
af81f9e7	10	#include <linux/netfilter/nf_conntrack_tuple_common.h>
ac2a6666	11	#include <net/dst.h>
3b49e2e9 PNA	12
	13	struct nf_flowtable;
	14
	15	struct nf_flowtable_type {
	16	struct list_head list;
	17	int family;
a268de77	18	int (init)(struct nf_flowtable ft);
b408c5b0	19	void (free)(struct nf_flowtable ft);
3b49e2e9 PNA	20	nf_hookfn *hook;
	21	struct module *owner;
	22	};
	23
	24	struct nf_flowtable {
84453a90	25	struct list_head list;
3b49e2e9	26	struct rhashtable rhashtable;
71a8a63b	27	int priority;
3b49e2e9 PNA	28	const struct nf_flowtable_type *type;
	29	struct delayed_work gc_work;
	30	};
	31
ac2a6666	32	enum flow_offload_tuple_dir {
af81f9e7 FF	33	FLOW_OFFLOAD_DIR_ORIGINAL = IP_CT_DIR_ORIGINAL,
	34	FLOW_OFFLOAD_DIR_REPLY = IP_CT_DIR_REPLY,
	35	FLOW_OFFLOAD_DIR_MAX = IP_CT_DIR_MAX
ac2a6666	36	};
ac2a6666 PNA	37
	38	struct flow_offload_tuple {
	39	union {
	40	struct in_addr src_v4;
	41	struct in6_addr src_v6;
	42	};
	43	union {
	44	struct in_addr dst_v4;
	45	struct in6_addr dst_v6;
	46	};
	47	struct {
	48	__be16 src_port;
	49	__be16 dst_port;
	50	};
	51
	52	int iifidx;
	53
	54	u8 l3proto;
	55	u8 l4proto;
	56	u8 dir;
	57
4f3780c0 FF	58	u16 mtu;
4f3780c0 FF	59
ac2a6666 PNA	60	struct dst_entry *dst_cache;
	61	};
	62
	63	struct flow_offload_tuple_rhash {
	64	struct rhash_head node;
	65	struct flow_offload_tuple tuple;
	66	};
	67
	68	#define FLOW_OFFLOAD_SNAT 0x1
	69	#define FLOW_OFFLOAD_DNAT 0x2
	70	#define FLOW_OFFLOAD_DYING 0x4
59c466dd	71	#define FLOW_OFFLOAD_TEARDOWN 0x8
ac2a6666 PNA	72
	73	struct flow_offload {
	74	struct flow_offload_tuple_rhash tuplehash[FLOW_OFFLOAD_DIR_MAX];
	75	u32 flags;
	76	union {
	77	/* Your private driver data here. */
	78	u32 timeout;
	79	};
	80	};
	81
	82	#define NF_FLOW_TIMEOUT (30 * HZ)
	83
	84	struct nf_flow_route {
	85	struct {
	86	struct dst_entry *dst;
ac2a6666 PNA	87	} tuple[FLOW_OFFLOAD_DIR_MAX];
	88	};
	89
	90	struct flow_offload flow_offload_alloc(struct nf_conn ct,
	91	struct nf_flow_route *route);
	92	void flow_offload_free(struct flow_offload *flow);
	93
	94	int flow_offload_add(struct nf_flowtable flow_table, struct flow_offload flow);
ac2a6666 PNA	95	struct flow_offload_tuple_rhash flow_offload_lookup(struct nf_flowtable flow_table,
ac2a6666 PNA	96	struct flow_offload_tuple *tuple);
5f1be84a	97	void nf_flow_table_cleanup(struct net_device *dev);
c0ea1bcb	98
a268de77	99	int nf_flow_table_init(struct nf_flowtable *flow_table);
b408c5b0	100	void nf_flow_table_free(struct nf_flowtable *flow_table);
ac2a6666	101
59c466dd	102	void flow_offload_teardown(struct flow_offload *flow);
6bdc3c68 FF	103	static inline void flow_offload_dead(struct flow_offload *flow)
	104	{
	105	flow->flags \|= FLOW_OFFLOAD_DYING;
	106	}
ac2a6666 PNA	107
	108	int nf_flow_snat_port(const struct flow_offload *flow,
	109	struct sk_buff *skb, unsigned int thoff,
	110	u8 protocol, enum flow_offload_tuple_dir dir);
	111	int nf_flow_dnat_port(const struct flow_offload *flow,
	112	struct sk_buff *skb, unsigned int thoff,
	113	u8 protocol, enum flow_offload_tuple_dir dir);
	114
	115	struct flow_ports {
	116	__be16 source, dest;
	117	};
	118
7c23b629 PNA	119	unsigned int nf_flow_offload_ip_hook(void priv, struct sk_buff skb,
	120	const struct nf_hook_state *state);
	121	unsigned int nf_flow_offload_ipv6_hook(void priv, struct sk_buff skb,
	122	const struct nf_hook_state *state);
	123
ac2a6666 PNA	124	#define MODULE_ALIAS_NF_FLOWTABLE(family) \
	125	MODULE_ALIAS("nf-flowtable-" __stringify(family))
	126
0286fbc6	127	#endif /* _NF_FLOW_TABLE_H */