skb_try_make_writable
if (skb_try_make_writable(skb, thoff + ctx->hdrsize))
if (skb_try_make_writable(skb, thoff + ctx->hdrsize))
if (skb_try_make_writable(skb, sizeof(*iph))) {
if (skb_try_make_writable(skb, sizeof(*ip6h))) {
skb_try_make_writable(skb, hl + ntkoff))
if (skb_try_make_writable(skb, sizeof(*iph) + ntkoff))
if (likely(!skb_try_make_writable(skb, wlen))) {
if (likely(!skb_try_make_writable(skb, wlen))) {
if (skb_try_make_writable(skb, sizeof(*iph) + noff))
skb_try_make_writable(skb, ihl + sizeof(*tcph) + noff))
skb_try_make_writable(skb, ihl + sizeof(*udph) + noff))
if (skb_try_make_writable(skb, ihl + sizeof(*icmph) +
skb_try_make_writable(skb, wlen))
skb_try_make_writable(skb, wlen))
skb_try_make_writable(skb, wlen))
skb_try_make_writable(skb, wlen))