skb_share_check(9)
NAME
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.