[INET]: Move common fields from frag_queues in one place.

Introduce the struct inet_frag_queue in include/net/inet_frag.h
file and place there all the common fields from three structs:

 * struct ipq in ipv4/ip_fragment.c
 * struct nf_ct_frag6_queue in nf_conntrack_reasm.c
 * struct frag_queue in ipv6/reassembly.c

After this, replace these fields on appropriate structures with
this structure instance and fix the users to use correct names
i.e. hunks like

-    atomic_dec(&fq->refcnt);
+    atomic_dec(&fq->q.refcnt);

(these occupy most of the patch)

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

1 files changed, 21 insertions, 0 deletions

diff --git a/include/net/inet_frag.h b/include/net/inet_frag.h
new file mode 100644
index 000000000000..74e9cb9b6943
--- /dev/null
+++ b/include/net/inet_frag.h
@@ -0,0 +1,21 @@
+#ifndef __NET_FRAG_H__
+#define __NET_FRAG_H__
+
+struct inet_frag_queue {
+        struct hlist_node       list;
+        struct list_head        lru_list;   /* lru list member */
+        spinlock_t              lock;
+        atomic_t                refcnt;
+        struct timer_list       timer;      /* when will this queue expire? */
+        struct sk_buff          *fragments; /* list of received fragments */
+        ktime_t                 stamp;
+        int                     len;        /* total length of orig datagram */
+        int                     meat;
+        __u8                    last_in;    /* first/last segment arrived? */
+
+#define COMPLETE                4
+#define FIRST_IN                2
+#define LAST_IN                 1
+};
+
+#endif