swh:1:snp:32555a3fd8878f019c2ebd6c964bc1edcaeff337
Tip revision: fd6988496e79a6a4bdb514a4655d2920209eb85d authored by Linus Torvalds on 29 December 2019, 23:29:16 UTC
Linux 5.5-rc4
Linux 5.5-rc4
Tip revision: fd69884
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/flow_offload.h>
#include <net/dst.h>
struct nf_flowtable;
struct nf_flow_rule;
struct flow_offload;
enum flow_offload_tuple_dir;
struct nf_flowtable_type {
struct list_head list;
int family;
int (*init)(struct nf_flowtable *ft);
int (*setup)(struct nf_flowtable *ft,
struct net_device *dev,
enum flow_block_command cmd);
int (*action)(struct net *net,
const struct flow_offload *flow,
enum flow_offload_tuple_dir dir,
struct nf_flow_rule *flow_rule);
void (*free)(struct nf_flowtable *ft);
nf_hookfn *hook;
struct module *owner;
};
enum nf_flowtable_flags {
NF_FLOWTABLE_HW_OFFLOAD = 0x1,
};
struct nf_flowtable {
struct list_head list;
struct rhashtable rhashtable;
int priority;
const struct nf_flowtable_type *type;
struct delayed_work gc_work;
unsigned int flags;
struct flow_block flow_block;
possible_net_t net;
};
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
#define FLOW_OFFLOAD_HW 0x10
#define FLOW_OFFLOAD_HW_DYING 0x20
#define FLOW_OFFLOAD_HW_DEAD 0x40
enum flow_offload_type {
NF_FLOW_OFFLOAD_UNSPEC = 0,
NF_FLOW_OFFLOAD_ROUTE,
};
struct flow_offload {
struct flow_offload_tuple_rhash tuplehash[FLOW_OFFLOAD_DIR_MAX];
struct nf_conn *ct;
u16 flags;
u16 type;
u32 timeout;
struct rcu_head rcu_head;
};
#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);
void flow_offload_free(struct flow_offload *flow);
int flow_offload_route_init(struct flow_offload *flow,
const struct nf_flow_route *route);
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))
void nf_flow_offload_add(struct nf_flowtable *flowtable,
struct flow_offload *flow);
void nf_flow_offload_del(struct nf_flowtable *flowtable,
struct flow_offload *flow);
void nf_flow_offload_stats(struct nf_flowtable *flowtable,
struct flow_offload *flow);
void nf_flow_table_offload_flush(struct nf_flowtable *flowtable);
int nf_flow_table_offload_setup(struct nf_flowtable *flowtable,
struct net_device *dev,
enum flow_block_command cmd);
int nf_flow_rule_route_ipv4(struct net *net, const struct flow_offload *flow,
enum flow_offload_tuple_dir dir,
struct nf_flow_rule *flow_rule);
int nf_flow_rule_route_ipv6(struct net *net, const struct flow_offload *flow,
enum flow_offload_tuple_dir dir,
struct nf_flow_rule *flow_rule);
int nf_flow_table_offload_init(void);
void nf_flow_table_offload_exit(void);
#endif /* _NF_FLOW_TABLE_H */