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net: Move ipv4 set_lwt_redirect helper to lwtunnel

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IPv4 uses set_lwt_redirect to set the lwtunnel redirect functions as
needed. Move it to lwtunnel.h as lwtunnel_set_redirect and change
IPv6 to also use it.

Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Ahern
2018-02-13 20:32:04 -08:00
committed by David S. Miller
parent 64da58528b
commit 9942895b5e
3 changed files with 18 additions and 23 deletions
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15
include/net/lwtunnel.h
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@@ -127,6 +127,17 @@ 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);
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)
@@ -158,6 +169,10 @@ 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)
{