mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 06:34:11 +08:00
ffa8ce54be
Currently, lwtunnel_fill_encap hardcodes the encap and encap type attributes as RTA_ENCAP and RTA_ENCAP_TYPE, respectively. The nexthop objects want to re-use this code but the encap attributes passed to userspace as NHA_ENCAP and NHA_ENCAP_TYPE. Since that is the only difference, change lwtunnel_fill_encap to take the attribute type as an input. Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
264 lines
6.4 KiB
C
264 lines
6.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __NET_LWTUNNEL_H
|
|
#define __NET_LWTUNNEL_H 1
|
|
|
|
#include <linux/lwtunnel.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/types.h>
|
|
#include <net/route.h>
|
|
|
|
#define LWTUNNEL_HASH_BITS 7
|
|
#define LWTUNNEL_HASH_SIZE (1 << LWTUNNEL_HASH_BITS)
|
|
|
|
/* lw tunnel state flags */
|
|
#define LWTUNNEL_STATE_OUTPUT_REDIRECT BIT(0)
|
|
#define LWTUNNEL_STATE_INPUT_REDIRECT BIT(1)
|
|
#define LWTUNNEL_STATE_XMIT_REDIRECT BIT(2)
|
|
|
|
enum {
|
|
LWTUNNEL_XMIT_DONE,
|
|
LWTUNNEL_XMIT_CONTINUE,
|
|
};
|
|
|
|
|
|
struct lwtunnel_state {
|
|
__u16 type;
|
|
__u16 flags;
|
|
__u16 headroom;
|
|
atomic_t refcnt;
|
|
int (*orig_output)(struct net *net, struct sock *sk, struct sk_buff *skb);
|
|
int (*orig_input)(struct sk_buff *);
|
|
struct rcu_head rcu;
|
|
__u8 data[0];
|
|
};
|
|
|
|
struct lwtunnel_encap_ops {
|
|
int (*build_state)(struct nlattr *encap,
|
|
unsigned int family, const void *cfg,
|
|
struct lwtunnel_state **ts,
|
|
struct netlink_ext_ack *extack);
|
|
void (*destroy_state)(struct lwtunnel_state *lws);
|
|
int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb);
|
|
int (*input)(struct sk_buff *skb);
|
|
int (*fill_encap)(struct sk_buff *skb,
|
|
struct lwtunnel_state *lwtstate);
|
|
int (*get_encap_size)(struct lwtunnel_state *lwtstate);
|
|
int (*cmp_encap)(struct lwtunnel_state *a, struct lwtunnel_state *b);
|
|
int (*xmit)(struct sk_buff *skb);
|
|
|
|
struct module *owner;
|
|
};
|
|
|
|
#ifdef CONFIG_LWTUNNEL
|
|
void lwtstate_free(struct lwtunnel_state *lws);
|
|
|
|
static inline struct lwtunnel_state *
|
|
lwtstate_get(struct lwtunnel_state *lws)
|
|
{
|
|
if (lws)
|
|
atomic_inc(&lws->refcnt);
|
|
|
|
return lws;
|
|
}
|
|
|
|
static inline void lwtstate_put(struct lwtunnel_state *lws)
|
|
{
|
|
if (!lws)
|
|
return;
|
|
|
|
if (atomic_dec_and_test(&lws->refcnt))
|
|
lwtstate_free(lws);
|
|
}
|
|
|
|
static inline bool lwtunnel_output_redirect(struct lwtunnel_state *lwtstate)
|
|
{
|
|
if (lwtstate && (lwtstate->flags & LWTUNNEL_STATE_OUTPUT_REDIRECT))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
static inline bool lwtunnel_input_redirect(struct lwtunnel_state *lwtstate)
|
|
{
|
|
if (lwtstate && (lwtstate->flags & LWTUNNEL_STATE_INPUT_REDIRECT))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
static inline bool lwtunnel_xmit_redirect(struct lwtunnel_state *lwtstate)
|
|
{
|
|
if (lwtstate && (lwtstate->flags & LWTUNNEL_STATE_XMIT_REDIRECT))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
static inline unsigned int lwtunnel_headroom(struct lwtunnel_state *lwtstate,
|
|
unsigned int mtu)
|
|
{
|
|
if ((lwtunnel_xmit_redirect(lwtstate) ||
|
|
lwtunnel_output_redirect(lwtstate)) && lwtstate->headroom < mtu)
|
|
return lwtstate->headroom;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int lwtunnel_encap_add_ops(const struct lwtunnel_encap_ops *op,
|
|
unsigned int num);
|
|
int lwtunnel_encap_del_ops(const struct lwtunnel_encap_ops *op,
|
|
unsigned int num);
|
|
int lwtunnel_valid_encap_type(u16 encap_type,
|
|
struct netlink_ext_ack *extack);
|
|
int lwtunnel_valid_encap_type_attr(struct nlattr *attr, int len,
|
|
struct netlink_ext_ack *extack);
|
|
int lwtunnel_build_state(u16 encap_type,
|
|
struct nlattr *encap,
|
|
unsigned int family, const void *cfg,
|
|
struct lwtunnel_state **lws,
|
|
struct netlink_ext_ack *extack);
|
|
int lwtunnel_fill_encap(struct sk_buff *skb, struct lwtunnel_state *lwtstate,
|
|
int encap_attr, int encap_type_attr);
|
|
int lwtunnel_get_encap_size(struct lwtunnel_state *lwtstate);
|
|
struct lwtunnel_state *lwtunnel_state_alloc(int hdr_len);
|
|
int lwtunnel_cmp_encap(struct lwtunnel_state *a, struct lwtunnel_state *b);
|
|
int lwtunnel_output(struct net *net, struct sock *sk, struct sk_buff *skb);
|
|
int lwtunnel_input(struct sk_buff *skb);
|
|
int lwtunnel_xmit(struct sk_buff *skb);
|
|
int bpf_lwt_push_ip_encap(struct sk_buff *skb, void *hdr, u32 len,
|
|
bool ingress);
|
|
|
|
static inline void lwtunnel_set_redirect(struct dst_entry *dst)
|
|
{
|
|
if (lwtunnel_output_redirect(dst->lwtstate)) {
|
|
dst->lwtstate->orig_output = dst->output;
|
|
dst->output = lwtunnel_output;
|
|
}
|
|
if (lwtunnel_input_redirect(dst->lwtstate)) {
|
|
dst->lwtstate->orig_input = dst->input;
|
|
dst->input = lwtunnel_input;
|
|
}
|
|
}
|
|
#else
|
|
|
|
static inline void lwtstate_free(struct lwtunnel_state *lws)
|
|
{
|
|
}
|
|
|
|
static inline struct lwtunnel_state *
|
|
lwtstate_get(struct lwtunnel_state *lws)
|
|
{
|
|
return lws;
|
|
}
|
|
|
|
static inline void lwtstate_put(struct lwtunnel_state *lws)
|
|
{
|
|
}
|
|
|
|
static inline bool lwtunnel_output_redirect(struct lwtunnel_state *lwtstate)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline bool lwtunnel_input_redirect(struct lwtunnel_state *lwtstate)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline bool lwtunnel_xmit_redirect(struct lwtunnel_state *lwtstate)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline void lwtunnel_set_redirect(struct dst_entry *dst)
|
|
{
|
|
}
|
|
|
|
static inline unsigned int lwtunnel_headroom(struct lwtunnel_state *lwtstate,
|
|
unsigned int mtu)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int lwtunnel_encap_add_ops(const struct lwtunnel_encap_ops *op,
|
|
unsigned int num)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
|
|
}
|
|
|
|
static inline int lwtunnel_encap_del_ops(const struct lwtunnel_encap_ops *op,
|
|
unsigned int num)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static inline int lwtunnel_valid_encap_type(u16 encap_type,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
NL_SET_ERR_MSG(extack, "CONFIG_LWTUNNEL is not enabled in this kernel");
|
|
return -EOPNOTSUPP;
|
|
}
|
|
static inline int lwtunnel_valid_encap_type_attr(struct nlattr *attr, int len,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
/* return 0 since we are not walking attr looking for
|
|
* RTA_ENCAP_TYPE attribute on nexthops.
|
|
*/
|
|
return 0;
|
|
}
|
|
|
|
static inline int lwtunnel_build_state(u16 encap_type,
|
|
struct nlattr *encap,
|
|
unsigned int family, const void *cfg,
|
|
struct lwtunnel_state **lws,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static inline int lwtunnel_fill_encap(struct sk_buff *skb,
|
|
struct lwtunnel_state *lwtstate,
|
|
int encap_attr, int encap_type_attr)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int lwtunnel_get_encap_size(struct lwtunnel_state *lwtstate)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline struct lwtunnel_state *lwtunnel_state_alloc(int hdr_len)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline int lwtunnel_cmp_encap(struct lwtunnel_state *a,
|
|
struct lwtunnel_state *b)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int lwtunnel_output(struct net *net, struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static inline int lwtunnel_input(struct sk_buff *skb)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static inline int lwtunnel_xmit(struct sk_buff *skb)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
#endif /* CONFIG_LWTUNNEL */
|
|
|
|
#define MODULE_ALIAS_RTNL_LWT(encap_type) MODULE_ALIAS("rtnl-lwt-" __stringify(encap_type))
|
|
|
|
#endif /* __NET_LWTUNNEL_H */
|