inet: refactor inet[6]_lookup functions to take skb
This is a preliminary step to allow fast socket lookup of SO_REUSEPORT
groups. Doing so with a BPF filter will require access to the
skb in question. This change plumbs the skb (and offset to payload
data) through the call stack to the listening socket lookup
implementations where it will be used in a following patch.
Signed-off-by: Craig Gallek <kraig@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/inet_hashtables.h b/include/net/inet_hashtables.h
index 554440e..8240339 100644
--- a/include/net/inet_hashtables.h
+++ b/include/net/inet_hashtables.h
@@ -213,6 +213,7 @@
struct sock *__inet_lookup_listener(struct net *net,
struct inet_hashinfo *hashinfo,
+ struct sk_buff *skb, int doff,
const __be32 saddr, const __be16 sport,
const __be32 daddr,
const unsigned short hnum,
@@ -220,10 +221,11 @@
static inline struct sock *inet_lookup_listener(struct net *net,
struct inet_hashinfo *hashinfo,
+ struct sk_buff *skb, int doff,
__be32 saddr, __be16 sport,
__be32 daddr, __be16 dport, int dif)
{
- return __inet_lookup_listener(net, hashinfo, saddr, sport,
+ return __inet_lookup_listener(net, hashinfo, skb, doff, saddr, sport,
daddr, ntohs(dport), dif);
}
@@ -299,6 +301,7 @@
static inline struct sock *__inet_lookup(struct net *net,
struct inet_hashinfo *hashinfo,
+ struct sk_buff *skb, int doff,
const __be32 saddr, const __be16 sport,
const __be32 daddr, const __be16 dport,
const int dif)
@@ -307,12 +310,13 @@
struct sock *sk = __inet_lookup_established(net, hashinfo,
saddr, sport, daddr, hnum, dif);
- return sk ? : __inet_lookup_listener(net, hashinfo, saddr, sport,
- daddr, hnum, dif);
+ return sk ? : __inet_lookup_listener(net, hashinfo, skb, doff, saddr,
+ sport, daddr, hnum, dif);
}
static inline struct sock *inet_lookup(struct net *net,
struct inet_hashinfo *hashinfo,
+ struct sk_buff *skb, int doff,
const __be32 saddr, const __be16 sport,
const __be32 daddr, const __be16 dport,
const int dif)
@@ -320,7 +324,8 @@
struct sock *sk;
local_bh_disable();
- sk = __inet_lookup(net, hashinfo, saddr, sport, daddr, dport, dif);
+ sk = __inet_lookup(net, hashinfo, skb, doff, saddr, sport, daddr,
+ dport, dif);
local_bh_enable();
return sk;
@@ -328,6 +333,7 @@
static inline struct sock *__inet_lookup_skb(struct inet_hashinfo *hashinfo,
struct sk_buff *skb,
+ int doff,
const __be16 sport,
const __be16 dport)
{
@@ -337,8 +343,8 @@
if (sk)
return sk;
else
- return __inet_lookup(dev_net(skb_dst(skb)->dev), hashinfo,
- iph->saddr, sport,
+ return __inet_lookup(dev_net(skb_dst(skb)->dev), hashinfo, skb,
+ doff, iph->saddr, sport,
iph->daddr, dport, inet_iif(skb));
}