__pskb_copy_fclone (9) - create copy of an sk_buff with private head.
__skb_queue_head_init (9) - initialize non-spinlock portions of sk_buff_head
kfree_skb (9)        - free an sk_buff
pskb_expand_head (9) - reallocate header of sk_buff
skb_clone (9)        - duplicate an sk_buff
skb_copy (9)         - create private copy of an sk_buff
skb_copy_expand (9)  - copy and expand sk_buff
skb_peek (9)         - peek at the head of an sk_buff_head
skb_peek_tail (9)    - peek at the tail of an sk_buff_head
skb_tx_error (9)     - report an sk_buff xmit error
struct_sk_buff (9)   - socket buffer