[INET]: Collect common frag sysctl variables together

Some sysctl variables are used to tune the frag queues
management and it will be useful to work with them in
a common way in the future, so move them into one
structure, moreover they are the same for all the frag
management codes.

I don't place them in the existing inet_frags object,
introduced in the previous patch for two reasons:

 1. to keep them in the __read_mostly section;
 2. not to export the whole inet_frags objects outside.

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

1 files changed, 8 insertions, 0 deletions

diff --git a/include/net/inet_frag.h b/include/net/inet_frag.h
index d51f23873da9..ada03ba3b341 100644
--- a/include/net/inet_frag.h
+++ b/include/net/inet_frag.h
@@ -20,6 +20,13 @@ struct inet_frag_queue {
 
 #define INETFRAGS_HASHSZ                64
 
+struct inet_frags_ctl {
+        int high_thresh;
+        int low_thresh;
+        int timeout;
+        int secret_interval;
+};
+
 struct inet_frags {
         struct list_head        lru_list;
         struct hlist_head       hash[INETFRAGS_HASHSZ];
@@ -28,6 +35,7 @@ struct inet_frags {
         int                     nqueues;
         atomic_t                mem;
         struct timer_list       secret_timer;
+        struct inet_frags_ctl   *ctl;
 };
 
 void inet_frags_init(struct inet_frags *);