[NETNS]: Tcp-v4 sockets per-net lookup.

Add a net argument to inet_lookup and propagate it further
into lookup calls. Plus tune the __inet_check_established.

The dccp and inet_diag, which use that lookup functions
pass the init_net into them.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 27 insertions, 21 deletions

diff --git a/include/net/inet_hashtables.h b/include/net/inet_hashtables.h
index 55532b9bb59a..c23c4ed30724 100644
--- a/include/net/inet_hashtables.h
+++ b/include/net/inet_hashtables.h
@@ -302,15 +302,17 @@ out:
                 wake_up(&hashinfo->lhash_wait);
 }
 
-extern struct sock *__inet_lookup_listener(struct inet_hashinfo *hashinfo,
+extern struct sock *__inet_lookup_listener(struct net *net,
+                                           struct inet_hashinfo *hashinfo,
                                            const __be32 daddr,
                                            const unsigned short hnum,
                                            const int dif);
 
-static inline struct sock *inet_lookup_listener(struct inet_hashinfo *hashinfo,
-                                                __be32 daddr, __be16 dport, int dif)
+static inline struct sock *inet_lookup_listener(struct net *net,
+                struct inet_hashinfo *hashinfo,
+                __be32 daddr, __be16 dport, int dif)
 {
-        return __inet_lookup_listener(hashinfo, daddr, ntohs(dport), dif);
+        return __inet_lookup_listener(net, hashinfo, daddr, ntohs(dport), dif);
 }
 
 /* Socket demux engine toys. */
@@ -344,26 +346,26 @@ typedef __u64 __bitwise __addrpair;
                                    (((__force __u64)(__be32)(__daddr)) << 32) | \
                                    ((__force __u64)(__be32)(__saddr)));
 #endif /* __BIG_ENDIAN */
-#define INET_MATCH(__sk, __hash, __cookie, __saddr, __daddr, __ports, __dif)\
-        (((__sk)->sk_hash == (__hash))                          &&      \
+#define INET_MATCH(__sk, __net, __hash, __cookie, __saddr, __daddr, __ports, __dif)\
+        (((__sk)->sk_hash == (__hash)) && ((__sk)->sk_net == (__net))   &&      \
          ((*((__addrpair *)&(inet_sk(__sk)->daddr))) == (__cookie))     &&      \
          ((*((__portpair *)&(inet_sk(__sk)->dport))) == (__ports))      &&      \
          (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
-#define INET_TW_MATCH(__sk, __hash, __cookie, __saddr, __daddr, __ports, __dif)\
-        (((__sk)->sk_hash == (__hash))                          &&      \
+#define INET_TW_MATCH(__sk, __net, __hash, __cookie, __saddr, __daddr, __ports, __dif)\
+        (((__sk)->sk_hash == (__hash)) && ((__sk)->sk_net == (__net))   &&      \
          ((*((__addrpair *)&(inet_twsk(__sk)->tw_daddr))) == (__cookie)) &&     \
          ((*((__portpair *)&(inet_twsk(__sk)->tw_dport))) == (__ports)) &&      \
          (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
 #else /* 32-bit arch */
 #define INET_ADDR_COOKIE(__name, __saddr, __daddr)
-#define INET_MATCH(__sk, __hash, __cookie, __saddr, __daddr, __ports, __dif)    \
-        (((__sk)->sk_hash == (__hash))                          &&      \
+#define INET_MATCH(__sk, __net, __hash, __cookie, __saddr, __daddr, __ports, __dif)     \
+        (((__sk)->sk_hash == (__hash)) && ((__sk)->sk_net == (__net))   &&      \
          (inet_sk(__sk)->daddr          == (__saddr))           &&      \
          (inet_sk(__sk)->rcv_saddr      == (__daddr))           &&      \
          ((*((__portpair *)&(inet_sk(__sk)->dport))) == (__ports))      &&      \
          (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
-#define INET_TW_MATCH(__sk, __hash,__cookie, __saddr, __daddr, __ports, __dif)  \
-        (((__sk)->sk_hash == (__hash))                          &&      \
+#define INET_TW_MATCH(__sk, __net, __hash,__cookie, __saddr, __daddr, __ports, __dif)   \
+        (((__sk)->sk_hash == (__hash)) && ((__sk)->sk_net == (__net))   &&      \
          (inet_twsk(__sk)->tw_daddr     == (__saddr))           &&      \
          (inet_twsk(__sk)->tw_rcv_saddr == (__daddr))           &&      \
          ((*((__portpair *)&(inet_twsk(__sk)->tw_dport))) == (__ports)) &&      \
@@ -376,32 +378,36 @@ typedef __u64 __bitwise __addrpair;
  *
  * Local BH must be disabled here.
  */
-extern struct sock * __inet_lookup_established(struct inet_hashinfo *hashinfo,
+extern struct sock * __inet_lookup_established(struct net *net,
+                struct inet_hashinfo *hashinfo,
                 const __be32 saddr, const __be16 sport,
                 const __be32 daddr, const u16 hnum, const int dif);
 
 static inline struct sock *
-        inet_lookup_established(struct inet_hashinfo *hashinfo,
+        inet_lookup_established(struct net *net, struct inet_hashinfo *hashinfo,
                                 const __be32 saddr, const __be16 sport,
                                 const __be32 daddr, const __be16 dport,
                                 const int dif)
 {
-        return __inet_lookup_established(hashinfo, saddr, sport, daddr,
+        return __inet_lookup_established(net, hashinfo, saddr, sport, daddr,
                                          ntohs(dport), dif);
 }
 
-static inline struct sock *__inet_lookup(struct inet_hashinfo *hashinfo,
+static inline struct sock *__inet_lookup(struct net *net,
+                                         struct inet_hashinfo *hashinfo,
                                          const __be32 saddr, const __be16 sport,
                                          const __be32 daddr, const __be16 dport,
                                          const int dif)
 {
         u16 hnum = ntohs(dport);
-        struct sock *sk = __inet_lookup_established(hashinfo, saddr, sport, daddr,
-                                                    hnum, dif);
-        return sk ? : __inet_lookup_listener(hashinfo, daddr, hnum, dif);
+        struct sock *sk = __inet_lookup_established(net, hashinfo,
+                                saddr, sport, daddr, hnum, dif);
+
+        return sk ? : __inet_lookup_listener(net, hashinfo, daddr, hnum, dif);
 }
 
-static inline struct sock *inet_lookup(struct inet_hashinfo *hashinfo,
+static inline struct sock *inet_lookup(struct net *net,
+                                       struct inet_hashinfo *hashinfo,
                                        const __be32 saddr, const __be16 sport,
                                        const __be32 daddr, const __be16 dport,
                                        const int dif)
@@ -409,7 +415,7 @@ static inline struct sock *inet_lookup(struct inet_hashinfo *hashinfo,
         struct sock *sk;
 
         local_bh_disable();
-        sk = __inet_lookup(hashinfo, saddr, sport, daddr, dport, dif);
+        sk = __inet_lookup(net, hashinfo, saddr, sport, daddr, dport, dif);
         local_bh_enable();
 
         return sk;