datagram: Add offset argument to __skb_recv_datagram
This one is only considered for MSG_PEEK flag and the value pointed by
it specifies where to start peeking bytes from. If the offset happens to
point into the middle of the returned skb, the offset within this skb is
put back to this very argument.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 2b7317f..f3cf43d 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -2046,7 +2046,7 @@
for (iter = skb_shinfo(skb)->frag_list; iter; iter = iter->next)
extern struct sk_buff *__skb_recv_datagram(struct sock *sk, unsigned flags,
- int *peeked, int *err);
+ int *peeked, int *off, int *err);
extern struct sk_buff *skb_recv_datagram(struct sock *sk, unsigned flags,
int noblock, int *err);
extern unsigned int datagram_poll(struct file *file, struct socket *sock,