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skb_share_check
Langue: en
Version: June 2009 (debian - 07/07/09)
Section: 9 (Appels noyau Linux)
NAME
skb_share_check - check if buffer is shared and if so clone itSYNOPSIS
- struct sk_buff * skb_share_check(struct sk_buff * skb, gfp_t pri);
ARGUMENTS
skb
- buffer to check
pri
- priority for memory allocation
DESCRIPTION
If the buffer is shared the buffer is cloned and the old copy drops a reference. A new clone with a single reference is returned. If the buffer is not shared the original buffer is returned. When being called from interrupt status or with spinlocks held pri must be GFP_ATOMIC.
NULL is returned on a memory allocation failure.
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