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[PATCH] tcp: Cache inetpeer in timewait socket, and only when necessary.

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Since it's guarenteed that we will access the inetpeer if we're trying
to do timewait recycling and TCP options were enabled on the
connection, just cache the peer in the timewait socket.

In the future, inetpeer lookups will be context dependent (per routing
realm), and this helps facilitate that as well.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2012-06-09 14:56:12 -07:00
parent 4670fd819e
commit 2397849baa
6 changed files with 22 additions and 40 deletions
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3
include/linux/tcp.h
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@ -506,8 +506,9 @@ struct tcp_timewait_sock {
u32 tw_rcv_wnd;
u32 tw_ts_recent;
long tw_ts_recent_stamp;
struct inet_peer *tw_peer;
#ifdef CONFIG_TCP_MD5SIG
struct tcp_md5sig_key *tw_md5_key;
struct tcp_md5sig_key *tw_md5_key;
#endif
/* Few sockets in timewait have cookies; in that case, then this
* object holds a reference to them (tw_cookie_values->kref).