[TWSK]: Introduce struct timewait_sock_ops
So that we can share several timewait sockets related functions and
make the timewait mini sockets infrastructure closer to the request
mini sockets one.
Next changesets will take advantage of this, moving more code out of
TCP and DCCP v4 and v6 to common infrastructure.
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h
index 7d39085..a0d0489 100644
--- a/include/linux/ipv6.h
+++ b/include/linux/ipv6.h
@@ -360,7 +360,8 @@
static inline u16 inet6_tw_offset(const struct proto *prot)
{
- return prot->twsk_obj_size - sizeof(struct inet6_timewait_sock);
+ return prot->twsk_prot->twsk_obj_size -
+ sizeof(struct inet6_timewait_sock);
}
static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk)
diff --git a/include/net/inet_timewait_sock.h b/include/net/inet_timewait_sock.h
index ca240f8..e396a65 100644
--- a/include/net/inet_timewait_sock.h
+++ b/include/net/inet_timewait_sock.h
@@ -26,6 +26,7 @@
#include <net/sock.h>
#include <net/tcp_states.h>
+#include <net/timewait_sock.h>
#include <asm/atomic.h>
@@ -200,7 +201,7 @@
printk(KERN_DEBUG "%s timewait_sock %p released\n",
tw->tw_prot->name, tw);
#endif
- kmem_cache_free(tw->tw_prot->twsk_slab, tw);
+ kmem_cache_free(tw->tw_prot->twsk_prot->twsk_slab, tw);
module_put(owner);
}
}
diff --git a/include/net/sock.h b/include/net/sock.h
index 0fbae85..91d2895 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -493,6 +493,7 @@
extern int sk_wait_data(struct sock *sk, long *timeo);
struct request_sock_ops;
+struct timewait_sock_ops;
/* Networking protocol blocks we attach to sockets.
* socket layer -> transport layer interface
@@ -557,11 +558,10 @@
kmem_cache_t *slab;
unsigned int obj_size;
- kmem_cache_t *twsk_slab;
- unsigned int twsk_obj_size;
atomic_t *orphan_count;
struct request_sock_ops *rsk_prot;
+ struct timewait_sock_ops *twsk_prot;
struct module *owner;
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 83b117a..176221c 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -287,6 +287,9 @@
extern void tcp_rcv_space_adjust(struct sock *sk);
+extern int tcp_twsk_unique(struct sock *sk,
+ struct sock *sktw, void *twp);
+
static inline void tcp_dec_quickack_mode(struct sock *sk,
const unsigned int pkts)
{
diff --git a/include/net/timewait_sock.h b/include/net/timewait_sock.h
new file mode 100644
index 0000000..2544281
--- /dev/null
+++ b/include/net/timewait_sock.h
@@ -0,0 +1,31 @@
+/*
+ * NET Generic infrastructure for Network protocols.
+ *
+ * Authors: Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#ifndef _TIMEWAIT_SOCK_H
+#define _TIMEWAIT_SOCK_H
+
+#include <linux/slab.h>
+#include <net/sock.h>
+
+struct timewait_sock_ops {
+ kmem_cache_t *twsk_slab;
+ unsigned int twsk_obj_size;
+ int (*twsk_unique)(struct sock *sk,
+ struct sock *sktw, void *twp);
+};
+
+static inline int twsk_unique(struct sock *sk, struct sock *sktw, void *twp)
+{
+ if (sk->sk_prot->twsk_prot->twsk_unique != NULL)
+ return sk->sk_prot->twsk_prot->twsk_unique(sk, sktw, twp);
+ return 0;
+}
+
+#endif /* _TIMEWAIT_SOCK_H */