skb_share_check (9) Linux Manual Page
skb_share_check – check if buffer is shared and if so clone it
Synopsis
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.