1 files changed, 25 insertions, 0 deletions

diff --git a/include/net/sock.h b/include/net/sock.h
index 91c1c8baf020..9c0553b9e451 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -357,6 +357,7 @@ struct sock {
         struct page             *sk_sndmsg_page;
         struct sk_buff          *sk_send_head;
         __u32                   sk_sndmsg_off;
+        __s32                   sk_peek_off;
         int                     sk_write_pending;
 #ifdef CONFIG_SECURITY
         void                    *sk_security;
@@ -373,6 +374,30 @@ struct sock {
         void                    (*sk_destruct)(struct sock *sk);
 };
 
+static inline int sk_peek_offset(struct sock *sk, int flags)
+{
+        if ((flags & MSG_PEEK) && (sk->sk_peek_off >= 0))
+                return sk->sk_peek_off;
+        else
+                return 0;
+}
+
+static inline void sk_peek_offset_bwd(struct sock *sk, int val)
+{
+        if (sk->sk_peek_off >= 0) {
+                if (sk->sk_peek_off >= val)
+                        sk->sk_peek_off -= val;
+                else
+                        sk->sk_peek_off = 0;
+        }
+}
+
+static inline void sk_peek_offset_fwd(struct sock *sk, int val)
+{
+        if (sk->sk_peek_off >= 0)
+                sk->sk_peek_off += val;
+}
+
 /*
  * Hashed lists helper routines
  */