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skb: Add documentation for skb_clone_sk

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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 <alexander.h.duyck@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexander Duyck 2014-09-10 18:05:26 -04:00 committed by David S. Miller
parent 72b126a45e
commit cab41c47d9
1 changed files with 13 additions and 0 deletions
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13
net/core/skbuff.c
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@ -3511,6 +3511,19 @@ struct sk_buff *sock_dequeue_err_skb(struct sock *sk)
} }
EXPORT_SYMBOL(sock_dequeue_err_skb); 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 sk_buff *skb_clone_sk(struct sk_buff *skb)
{ {
struct sock *sk = skb->sk; struct sock *sk = skb->sk;