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.