[PATCH net-next 2/5] inet: constify 'struct net' parameter of various lookup helpers

[Eric Dumazet <edumazet@google.com>]

Following helpers do not touch their struct net argument:

- bpf_sk_lookup_run_v4()
- inet_lookup_reuseport()
- inet_lhash2_lookup()
- inet_lookup_run_sk_lookup()
- __inet_lookup_listener()
- __inet_lookup_established()

Signed-off-by: Eric Dumazet <edumazet@google.com>
---
 include/linux/filter.h        |  2 +-
 include/net/inet_hashtables.h |  8 ++++----
 net/ipv4/inet_hashtables.c    | 10 +++++-----
 3 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/include/linux/filter.h b/include/linux/filter.h
index b6672ff61407fc8dd56e4555e30f1a3c9dc238dc..4acd1da4dac623a0af53c3df888d42326189efcf 100644
--- a/include/linux/filter.h
+++ b/include/linux/filter.h
@@ -1616,7 +1616,7 @@ extern struct static_key_false bpf_sk_lookup_enabled;
 		_all_pass || _selected_sk ? SK_PASS : SK_DROP;		\
 	 })
 
-static inline bool bpf_sk_lookup_run_v4(struct net *net, int protocol,
+static inline bool bpf_sk_lookup_run_v4(const struct net *net, int protocol,
 					const __be32 saddr, const __be16 sport,
 					const __be32 daddr, const u16 dport,
 					const int ifindex, struct sock **psk)
diff --git a/include/net/inet_hashtables.h b/include/net/inet_hashtables.h
index 1cc8b7ca20a10c1b0c8a6b9a029e5f8b4a1e846d..5eea47f135a421ce8275d4cd83c5771b3f448e5c 100644
--- a/include/net/inet_hashtables.h
+++ b/include/net/inet_hashtables.h
@@ -304,7 +304,7 @@ int __inet_hash(struct sock *sk, struct sock *osk);
 int inet_hash(struct sock *sk);
 void inet_unhash(struct sock *sk);
 
-struct sock *__inet_lookup_listener(struct net *net,
+struct sock *__inet_lookup_listener(const struct net *net,
 				    struct inet_hashinfo *hashinfo,
 				    struct sk_buff *skb, int doff,
 				    const __be32 saddr, const __be16 sport,
@@ -368,7 +368,7 @@ static inline bool inet_match(const struct net *net, const struct sock *sk,
 /* Sockets in TCP_CLOSE state are _always_ taken out of the hash, so we need
  * not check it for lookups anymore, thanks Alexey. -DaveM
  */
-struct sock *__inet_lookup_established(struct net *net,
+struct sock *__inet_lookup_established(const struct net *net,
 				       struct inet_hashinfo *hashinfo,
 				       const __be32 saddr, const __be16 sport,
 				       const __be32 daddr, const u16 hnum,
@@ -382,13 +382,13 @@ inet_ehashfn_t inet_ehashfn;
 
 INDIRECT_CALLABLE_DECLARE(inet_ehashfn_t udp_ehashfn);
 
-struct sock *inet_lookup_reuseport(struct net *net, struct sock *sk,
+struct sock *inet_lookup_reuseport(const struct net *net, struct sock *sk,
 				   struct sk_buff *skb, int doff,
 				   __be32 saddr, __be16 sport,
 				   __be32 daddr, unsigned short hnum,
 				   inet_ehashfn_t *ehashfn);
 
-struct sock *inet_lookup_run_sk_lookup(struct net *net,
+struct sock *inet_lookup_run_sk_lookup(const struct net *net,
 				       int protocol,
 				       struct sk_buff *skb, int doff,
 				       __be32 saddr, __be16 sport,
diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c
index 3d913dbd028404b1a1bf4dc3f988133e4a1d52ec..9bfcfd016e18275fb50fea8d77adc8a64fb12494 100644
--- a/net/ipv4/inet_hashtables.c
+++ b/net/ipv4/inet_hashtables.c
@@ -348,7 +348,7 @@ static inline int compute_score(struct sock *sk, const struct net *net,
  * Return: NULL if sk doesn't have SO_REUSEPORT set, otherwise a pointer to
  *         the selected sock or an error.
  */
-struct sock *inet_lookup_reuseport(struct net *net, struct sock *sk,
+struct sock *inet_lookup_reuseport(const struct net *net, struct sock *sk,
 				   struct sk_buff *skb, int doff,
 				   __be32 saddr, __be16 sport,
 				   __be32 daddr, unsigned short hnum,
@@ -374,7 +374,7 @@ EXPORT_SYMBOL_GPL(inet_lookup_reuseport);
  */
 
 /* called with rcu_read_lock() : No refcount taken on the socket */
-static struct sock *inet_lhash2_lookup(struct net *net,
+static struct sock *inet_lhash2_lookup(const struct net *net,
 				struct inet_listen_hashbucket *ilb2,
 				struct sk_buff *skb, int doff,
 				const __be32 saddr, __be16 sport,
@@ -401,7 +401,7 @@ static struct sock *inet_lhash2_lookup(struct net *net,
 	return result;
 }
 
-struct sock *inet_lookup_run_sk_lookup(struct net *net,
+struct sock *inet_lookup_run_sk_lookup(const struct net *net,
 				       int protocol,
 				       struct sk_buff *skb, int doff,
 				       __be32 saddr, __be16 sport,
@@ -423,7 +423,7 @@ struct sock *inet_lookup_run_sk_lookup(struct net *net,
 	return sk;
 }
 
-struct sock *__inet_lookup_listener(struct net *net,
+struct sock *__inet_lookup_listener(const struct net *net,
 				    struct inet_hashinfo *hashinfo,
 				    struct sk_buff *skb, int doff,
 				    const __be32 saddr, __be16 sport,
@@ -488,7 +488,7 @@ void sock_edemux(struct sk_buff *skb)
 }
 EXPORT_SYMBOL(sock_edemux);
 
-struct sock *__inet_lookup_established(struct net *net,
+struct sock *__inet_lookup_established(const struct net *net,
 				  struct inet_hashinfo *hashinfo,
 				  const __be32 saddr, const __be16 sport,
 				  const __be32 daddr, const u16 hnum,
-- 
2.46.0.rc2.264.g509ed76dc8-goog