root_skb 1155 include/linux/skbuff.h struct sk_buff *root_skb; root_skb 3434 net/core/skbuff.c st->root_skb = st->cur_skb = skb; root_skb 3518 net/core/skbuff.c if (st->root_skb == st->cur_skb && skb_has_frag_list(st->root_skb)) { root_skb 3519 net/core/skbuff.c st->cur_skb = skb_shinfo(st->root_skb)->frag_list;