From cab41c47d92851de71c74b1a7bdbf0fadf6ae4ba Mon Sep 17 00:00:00 2001 From: Alexander Duyck Date: Wed, 10 Sep 2014 18:05:26 -0400 Subject: [PATCH] skb: Add documentation for skb_clone_sk This change adds some documentation to the call skb_clone_sk. This is meant to help clarify the purpose of the function for other developers. Signed-off-by: Alexander Duyck Signed-off-by: David S. Miller --- net/core/skbuff.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/net/core/skbuff.c b/net/core/skbuff.c index a18dfb02d944..c9da77a95e2d 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -3511,6 +3511,19 @@ struct sk_buff *sock_dequeue_err_skb(struct sock *sk) } EXPORT_SYMBOL(sock_dequeue_err_skb); +/** + * skb_clone_sk - create clone of skb, and take reference to socket + * @skb: the skb to clone + * + * This function creates a clone of a buffer that holds a reference on + * sk_refcnt. Buffers created via this function are meant to be + * returned using sock_queue_err_skb, or free via kfree_skb. + * + * When passing buffers allocated with this function to sock_queue_err_skb + * it is necessary to wrap the call with sock_hold/sock_put in order to + * prevent the socket from being released prior to being enqueued on + * the sk_error_queue. + */ struct sk_buff *skb_clone_sk(struct sk_buff *skb) { struct sock *sk = skb->sk; -- 2.20.1