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xfrm: Add a xfrm type offload.

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We add a struct  xfrm_type_offload so that we have the offloaded
codepath separated to the non offloaded codepath. With this the
non offloade and the offloaded codepath can coexist.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Steffen Klassert
2017-04-14 10:05:44 +02:00
parent c7ef8f0c02
commit 9d389d7f84
2 changed files with 95 additions and 6 deletions
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28
include/net/xfrm.h
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@@ -222,6 +222,8 @@ struct xfrm_state {
struct xfrm_mode *inner_mode_iaf;
struct xfrm_mode *outer_mode;
const struct xfrm_type_offload *type_offload;
/* Security context */
struct xfrm_sec_ctx *security;
@@ -314,12 +316,14 @@ void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
int __xfrm_state_delete(struct xfrm_state *x);
struct xfrm_state_afinfo {
unsigned int family;
unsigned int proto;
__be16 eth_proto;
struct module *owner;
const struct xfrm_type *type_map[IPPROTO_MAX];
struct xfrm_mode *mode_map[XFRM_MODE_MAX];
unsigned int family;
unsigned int proto;
__be16 eth_proto;
struct module *owner;
const struct xfrm_type *type_map[IPPROTO_MAX];
const struct xfrm_type_offload *type_offload_map[IPPROTO_MAX];
struct xfrm_mode *mode_map[XFRM_MODE_MAX];
int (*init_flags)(struct xfrm_state *x);
void (*init_tempsel)(struct xfrm_selector *sel,
const struct flowi *fl);
@@ -380,6 +384,18 @@ struct xfrm_type {
int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
struct xfrm_type_offload {
char *description;
struct module *owner;
u8 proto;
void (*encap)(struct xfrm_state *, struct sk_buff *pskb);
int (*input_tail)(struct xfrm_state *x, struct sk_buff *skb);
int (*xmit)(struct xfrm_state *, struct sk_buff *pskb, netdev_features_t features);
};
int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned short family);
int xfrm_unregister_type_offload(const struct xfrm_type_offload *type, unsigned short family);
struct xfrm_mode {
/*
* Remove encapsulation header.