[INET]: Move bind_hash from tcp_sk to inet_sk

This should really be in a inet_connection_sock, but I'm leaving it
for a later optimization, when some more fields common to INET
transport protocols now in tcp_sk or inet_sk will be chunked out into
inet_connection_sock, for now its better to concentrate on getting the
changes in the core merged to leave the DCCP tree with only DCCP
specific code.

Next changesets will take advantage of this move to generalise things
like tcp_bind_hash, tcp_put_port, tcp_inherit_port, making the later
receive a inet_hashinfo parameter, and even __tcp_tw_hashdance, etc in
the future, when tcp_tw_bucket gets transformed into the struct
timewait_sock hierarchy.

tcp_destroy_sock also is eligible as soon as tcp_orphan_count gets
moved to sk_prot.

A cascade of incremental changes will ultimately make the tcp_lookup
functions be fully generic.

Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 3 insertions, 2 deletions

diff --git a/include/linux/ip.h b/include/linux/ip.h
index 33e8a19a1a0f..2c54bbd3da76 100644
--- a/include/linux/ip.h
+++ b/include/linux/ip.h
@@ -128,6 +128,7 @@ static inline struct inet_request_sock *inet_rsk(const struct request_sock *sk)
         return (struct inet_request_sock *)sk;
 }
 
+struct inet_bind_bucket;
 struct ipv6_pinfo;
 
 struct inet_sock {
@@ -157,6 +158,7 @@ struct inet_sock {
         int                     mc_index;       /* Multicast device index */
         __u32                   mc_addr;
         struct ip_mc_socklist   *mc_list;       /* Group array */
+        struct inet_bind_bucket *bind_hash;
         /*
          * Following members are used to retain the infomation to build
          * an ip header on each ip fragmentation while the socket is corked.
diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index ec580a560e8c..e70ab19652db 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -258,7 +258,6 @@ struct tcp_sock {
         __u32   snd_sml;        /* Last byte of the most recently transmitted small packet */
         __u32   rcv_tstamp;     /* timestamp of last received ACK (for keepalives) */
         __u32   lsndtime;       /* timestamp of last sent data packet (for restart window) */
-        struct inet_bind_bucket *bind_hash;
         /* Delayed ACK control data */
         struct {
                 __u8    pending;        /* ACK is pending */
diff --git a/include/net/tcp.h b/include/net/tcp.h
index ff5d30ac2b06..6c6c879e7e87 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1266,7 +1266,7 @@ static __inline__ void tcp_set_state(struct sock *sk, int state)
                         TCP_INC_STATS(TCP_MIB_ESTABRESETS);
 
                 sk->sk_prot->unhash(sk);
-                if (tcp_sk(sk)->bind_hash &&
+                if (inet_sk(sk)->bind_hash &&
                     !(sk->sk_userlocks & SOCK_BINDPORT_LOCK))
                         tcp_put_port(sk);
                 /* fall through */