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authorEric Dumazet <edumazet@google.com>2015-10-02 21:43:32 +0300
committerDavid S. Miller <davem@davemloft.net>2015-10-03 14:32:41 +0300
commit079096f103faca2dd87342cca6f23d4b34da8871 (patch)
treefa3fb0fdc064f1611c464384e70a7a402179808f /include/net
parent2feda34192a379f8b35a7c6c5826b2f23e884f32 (diff)
downloadlinux-079096f103faca2dd87342cca6f23d4b34da8871.tar.xz
tcp/dccp: install syn_recv requests into ehash table
In this patch, we insert request sockets into TCP/DCCP regular ehash table (where ESTABLISHED and TIMEWAIT sockets are) instead of using the per listener hash table. ACK packets find SYN_RECV pseudo sockets without having to find and lock the listener. In nominal conditions, this halves pressure on listener lock. Note that this will allow for SO_REUSEPORT refinements, so that we can select a listener using cpu/numa affinities instead of the prior 'consistent hash', since only SYN packets will apply this selection logic. We will shrink listen_sock in the following patch to ease code review. Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Ying Cai <ycai@google.com> Cc: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
-rw-r--r--include/net/inet_connection_sock.h4
-rw-r--r--include/net/inet_hashtables.h1
-rw-r--r--include/net/request_sock.h4
-rw-r--r--include/net/tcp.h3
4 files changed, 1 insertions, 11 deletions
diff --git a/include/net/inet_connection_sock.h b/include/net/inet_connection_sock.h
index b2e2e30befa9..730aa034cd3d 100644
--- a/include/net/inet_connection_sock.h
+++ b/include/net/inet_connection_sock.h
@@ -258,10 +258,6 @@ inet_csk_rto_backoff(const struct inet_connection_sock *icsk,
struct sock *inet_csk_accept(struct sock *sk, int flags, int *err);
-struct request_sock *inet_csk_search_req(struct sock *sk,
- const __be16 rport,
- const __be32 raddr,
- const __be32 laddr);
int inet_csk_bind_conflict(const struct sock *sk,
const struct inet_bind_bucket *tb, bool relax);
int inet_csk_get_port(struct sock *sk, unsigned short snum);
diff --git a/include/net/inet_hashtables.h b/include/net/inet_hashtables.h
index 3fb778d7c875..6683ada25fef 100644
--- a/include/net/inet_hashtables.h
+++ b/include/net/inet_hashtables.h
@@ -205,6 +205,7 @@ void inet_put_port(struct sock *sk);
void inet_hashinfo_init(struct inet_hashinfo *h);
+int inet_ehash_insert(struct sock *sk, struct sock *osk);
void __inet_hash_nolisten(struct sock *sk, struct sock *osk);
void __inet_hash(struct sock *sk, struct sock *osk);
void inet_hash(struct sock *sk);
diff --git a/include/net/request_sock.h b/include/net/request_sock.h
index 97c1ba61ed2d..e1850923c4f5 100644
--- a/include/net/request_sock.h
+++ b/include/net/request_sock.h
@@ -266,8 +266,4 @@ static inline int reqsk_queue_is_full(const struct request_sock_queue *queue)
return reqsk_queue_len(queue) >> queue->listen_opt->max_qlen_log;
}
-void reqsk_queue_hash_req(struct request_sock_queue *queue,
- u32 hash, struct request_sock *req,
- unsigned long timeout);
-
#endif /* _REQUEST_SOCK_H */
diff --git a/include/net/tcp.h b/include/net/tcp.h
index a26341d2ad67..225e9561af35 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1618,7 +1618,6 @@ static inline bool tcp_stream_is_thin(struct tcp_sock *tp)
/* /proc */
enum tcp_seq_states {
TCP_SEQ_STATE_LISTENING,
- TCP_SEQ_STATE_OPENREQ,
TCP_SEQ_STATE_ESTABLISHED,
};
@@ -1717,8 +1716,6 @@ struct tcp_request_sock_ops {
int (*send_synack)(const struct sock *sk, struct dst_entry *dst,
struct flowi *fl, struct request_sock *req,
u16 queue_mapping, struct tcp_fastopen_cookie *foc);
- void (*queue_hash_add)(struct sock *sk, struct request_sock *req,
- const unsigned long timeout);
};
#ifdef CONFIG_SYN_COOKIES