tipc: move message validation function to msg.c

The function link_buf_validate() is in reality re-entrant and context
independent, and will in later commits be called from several locations.
Therefore, we move it to msg.c, make it outline and rename the it to
tipc_msg_validate().

We also redesign the function to make proper use of pskb_may_pull()

Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 2 deletions

diff --git a/net/tipc/msg.h b/net/tipc/msg.h
index 7cece647394c..62306b8d2410 100644
--- a/net/tipc/msg.h
+++ b/net/tipc/msg.h
@@ -1,7 +1,7 @@
 /*
  * net/tipc/msg.h: Include file for TIPC message header routines
  *
- * Copyright (c) 2000-2007, 2014, Ericsson AB
+ * Copyright (c) 2000-2007, 2014-2015 Ericsson AB
  * Copyright (c) 2005-2008, 2010-2011, Wind River Systems
  * All rights reserved.
  *
@@ -92,7 +92,7 @@ struct plist;
 struct tipc_skb_cb {
         void *handle;
         struct sk_buff *tail;
-        bool deferred;
+        bool validated;
         bool wakeup_pending;
         bool bundling;
         u16 chain_sz;
@@ -758,6 +758,7 @@ static inline u32 msg_tot_origport(struct tipc_msg *m)
 }
 
 struct sk_buff *tipc_buf_acquire(u32 size);
+bool tipc_msg_validate(struct sk_buff *skb);
 bool tipc_msg_reverse(u32 own_addr, struct sk_buff *buf, u32 *dnode,
                       int err);
 void tipc_msg_init(u32 own_addr, struct tipc_msg *m, u32 user, u32 type,