skb_unshare(9)
NAME
skb_unshare - make a copy of a shared buffer
SYNOPSIS
struct sk_buff * skb_unshare(struct sk_buff * skb, gfp_t pri);
ARGUMENTS
- skb
- buffer to check
- pri
- priority for memory allocation
DESCRIPTION
If the socket buffer is a clone then this function creates a new copy
of the data, drops a reference count on the old copy and returns the
new copy with the reference count at 1. If the buffer is not a clone
the original buffer is returned. When called with a spinlock held or
from interrupt state pri must be GFP_ATOMIC
NULL is returned on a memory allocation failure.