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authorPablo Neira Ayuso <pablo@netfilter.org>2019-11-12 00:29:56 +0100
committerDavid S. Miller <davem@davemloft.net>2019-11-12 19:42:26 -0800
commitc29f74e0df7a02b8303bcdce93a7c0132d62577a (patch)
tree7aa07ff32a7c48caaadc7814b95d93d72677bc25 /include
parent8bb69f3b2918788435cbd5834c66682642c09fba (diff)
netfilter: nf_flow_table: hardware offload support
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>
Diffstat (limited to 'include')
-rw-r--r--include/linux/netdevice.h1
-rw-r--r--include/net/netfilter/nf_flow_table.h33
2 files changed, 28 insertions, 6 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index f857f01234f7..9e6fb8524d91 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -848,6 +848,7 @@ enum tc_setup_type {
TC_SETUP_ROOT_QDISC,
TC_SETUP_QDISC_GRED,
TC_SETUP_QDISC_TAPRIO,
+ TC_SETUP_FT,
};
/* These structures hold the attributes of bpf state that are being passed
diff --git a/include/net/netfilter/nf_flow_table.h b/include/net/netfilter/nf_flow_table.h
index ece09d36c7a6..eea66de328d3 100644
--- a/include/net/netfilter/nf_flow_table.h
+++ b/include/net/netfilter/nf_flow_table.h
@@ -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 */