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net: export inet_lookup_reuseport and inet6_lookup_reuseport

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[ Upstream commit ce796e60b3b196b61fcc565df195443cbb846ef0 ]

Rename the existing reuseport helpers for IPv4 and IPv6 so that they
can be invoked in the follow up commit. Export them so that building
DCCP and IPv6 as a module works.

No change in functionality.

Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: Lorenz Bauer <lmb@isovalent.com>
Link: https://lore.kernel.org/r/20230720-so-reuseport-v6-3-7021b683cdae@isovalent.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Stable-dep-of: 50aee97d1511 ("udp: Avoid call to compute_score on multiple sites")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Lorenz Bauer 2023-07-20 17:30:07 +02:00 • committed by Ksawlii
parent ef76ce3891
commit 59aa82b7e8
4 changed files with 30 additions and 16 deletions
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7
include/net/inet6_hashtables.h
View file

@ -48,6 +48,13 @@ struct sock *__inet6_lookup_established(struct net *net,
const u16 hnum, const int dif,
const int sdif);
struct sock *inet6_lookup_reuseport(struct net *net, struct sock *sk,
struct sk_buff *skb, int doff,
const struct in6_addr *saddr,
__be16 sport,
const struct in6_addr *daddr,
unsigned short hnum);
struct sock *inet6_lookup_listener(struct net *net,
struct inet_hashinfo *hashinfo,
struct sk_buff *skb, int doff,

5
include/net/inet_hashtables.h
View file

@ -313,6 +313,11 @@ struct sock *__inet_lookup_established(struct net *net,
const __be32 daddr, const u16 hnum,
const int dif, const int sdif);
struct sock *inet_lookup_reuseport(struct net *net, struct sock *sk,
struct sk_buff *skb, int doff,
__be32 saddr, __be16 sport,
__be32 daddr, unsigned short hnum);
static inline struct sock *
inet_lookup_established(struct net *net, struct inet_hashinfo *hashinfo,
const __be32 saddr, const __be16 sport,

7
net/ipv4/inet_hashtables.c
View file

@ -252,7 +252,7 @@ static inline int compute_score(struct sock *sk, struct net *net,
return score;
}
static inline struct sock *lookup_reuseport(struct net *net, struct sock *sk,
struct sock *inet_lookup_reuseport(struct net *net, struct sock *sk,
struct sk_buff *skb, int doff,
__be32 saddr, __be16 sport,
__be32 daddr, unsigned short hnum)
@ -266,6 +266,7 @@ static inline struct sock *lookup_reuseport(struct net *net, struct sock *sk,
}
return reuse_sk;
}
EXPORT_SYMBOL_GPL(inet_lookup_reuseport);
/*
* Here are some nice properties to exploit here. The BSD API
@ -290,7 +291,7 @@ static struct sock *inet_lhash2_lookup(struct net *net,
sk = (struct sock *)icsk;
score = compute_score(sk, net, hnum, daddr, dif, sdif);
if (score > hiscore) {
result = lookup_reuseport(net, sk, skb, doff,
result = inet_lookup_reuseport(net, sk, skb, doff,
saddr, sport, daddr, hnum);
if (result)
return result;
@ -320,7 +321,7 @@ static inline struct sock *inet_lookup_run_bpf(struct net *net,
if (no_reuseport || IS_ERR_OR_NULL(sk))
return sk;
reuse_sk = lookup_reuseport(net, sk, skb, doff, saddr, sport, daddr, hnum);
reuse_sk = inet_lookup_reuseport(net, sk, skb, doff, saddr, sport, daddr, hnum);
if (reuse_sk)
sk = reuse_sk;
return sk;

7
net/ipv6/inet6_hashtables.c
View file

@ -113,7 +113,7 @@ static inline int compute_score(struct sock *sk, struct net *net,
return score;
}
static inline struct sock *lookup_reuseport(struct net *net, struct sock *sk,
struct sock *inet6_lookup_reuseport(struct net *net, struct sock *sk,
struct sk_buff *skb, int doff,
const struct in6_addr *saddr,
__be16 sport,
@ -129,6 +129,7 @@ static inline struct sock *lookup_reuseport(struct net *net, struct sock *sk,
}
return reuse_sk;
}
EXPORT_SYMBOL_GPL(inet6_lookup_reuseport);
/* called with rcu_read_lock() */
static struct sock *inet6_lhash2_lookup(struct net *net,
@ -146,7 +147,7 @@ static struct sock *inet6_lhash2_lookup(struct net *net,
sk = (struct sock *)icsk;
score = compute_score(sk, net, hnum, daddr, dif, sdif);
if (score > hiscore) {
result = lookup_reuseport(net, sk, skb, doff,
result = inet6_lookup_reuseport(net, sk, skb, doff,
saddr, sport, daddr, hnum);
if (result)
return result;
@ -178,7 +179,7 @@ static inline struct sock *inet6_lookup_run_bpf(struct net *net,
if (no_reuseport || IS_ERR_OR_NULL(sk))
return sk;
reuse_sk = lookup_reuseport(net, sk, skb, doff, saddr, sport, daddr, hnum);
reuse_sk = inet6_lookup_reuseport(net, sk, skb, doff, saddr, sport, daddr, hnum);
if (reuse_sk)
sk = reuse_sk;
return sk;