leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

netfilter: nf_flow_table: hardware offload support

Browse Source 
This patch adds the dataplane hardware offload to the flowtable
infrastructure. Three new flags represent the hardware state of this
flow:

* FLOW_OFFLOAD_HW: This flow entry resides in the hardware.
* FLOW_OFFLOAD_HW_DYING: This flow entry has been scheduled to be remove
  from hardware. This might be triggered by either packet path (via TCP
  RST/FIN packet) or via aging.
* FLOW_OFFLOAD_HW_DEAD: This flow entry has been already removed from
  the hardware, the software garbage collector can remove it from the
  software flowtable.

This patch supports for:

* IPv4 only.
* Aging via FLOW_CLS_STATS, no packet and byte counter synchronization
  at this stage.

This patch also adds the action callback that specifies how to convert
the flow entry into the flow_rule object that is passed to the driver.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pablo Neira Ayuso
2019-11-12 00:29:56 +01:00
committed by David S. Miller
parent 8bb69f3b29
commit c29f74e0df
8 changed files with 822 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
include/net/netfilter/nf_flow_table.h
View File

@@ -12,6 +12,9 @@
#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;
@@ -20,6 +23,10 @@ struct nf_flowtable_type {
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;
@@ -80,6 +87,9 @@ struct flow_offload_tuple_rhash {
#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,
@@ -142,11 +152,22 @@ unsigned int nf_flow_offload_ipv6_hook(void *priv, struct sk_buff *skb,
#define MODULE_ALIAS_NF_FLOWTABLE(family) \
MODULE_ALIAS("nf-flowtable-" __stringify(family))
static inline int nf_flow_table_offload_setup(struct nf_flowtable *flowtable,
struct net_device *dev,
enum flow_block_command cmd)
{
return 0;
}
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(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 */