skb_share_check (9) - Linux Man Pages
skb_share_check: check if buffer is shared and if so clone it
skb_share_check - check if buffer is shared and if so clone it
struct sk_buff * skb_share_check(struct sk_buff
*skb, gfp_t pri);
- buffer to check
- priority for memory allocation
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.