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net: ipv4: Move ip_options_fragment() out of loop

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The ip_options_fragment() only called when iter->offset is equal to zero,
so move it out of loop, and inline 'Copy the flags to each fragment.'
As also, remove the unused parameter in ip_frag_ipcb().

Signed-off-by: Yajun Deng <yajun.deng@linux.dev>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yajun Deng 2021-08-23 11:17:59 +08:00 committed by David S. Miller
parent 1bb39cb65b
commit faf482ca19
1 changed files with 4 additions and 15 deletions
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19
net/ipv4/ip_output.c
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@ -606,18 +606,6 @@ void ip_fraglist_init(struct sk_buff *skb, struct iphdr *iph,
}
EXPORT_SYMBOL(ip_fraglist_init);
static void ip_fraglist_ipcb_prepare(struct sk_buff *skb,
struct ip_fraglist_iter *iter)
{
struct sk_buff *to = iter->frag;
/* Copy the flags to each fragment. */
IPCB(to)->flags = IPCB(skb)->flags;
if (iter->offset == 0)
ip_options_fragment(to);
}
void ip_fraglist_prepare(struct sk_buff *skb, struct ip_fraglist_iter *iter)
{
unsigned int hlen = iter->hlen;
@ -663,7 +651,7 @@ void ip_frag_init(struct sk_buff *skb, unsigned int hlen,
EXPORT_SYMBOL(ip_frag_init);
static void ip_frag_ipcb(struct sk_buff *from, struct sk_buff *to,
bool first_frag, struct ip_frag_state *state)
bool first_frag)
{
/* Copy the flags to each fragment. */
IPCB(to)->flags = IPCB(from)->flags;
@ -837,12 +825,13 @@ int ip_do_fragment(struct net *net, struct sock *sk, struct sk_buff *skb,
/* Everything is OK. Generate! */
ip_fraglist_init(skb, iph, hlen, &iter);
ip_options_fragment(iter.frag);
for (;;) {
/* Prepare header of the next frame,
* before previous one went down. */
if (iter.frag) {
ip_fraglist_ipcb_prepare(skb, &iter);
IPCB(iter.frag)->flags = IPCB(skb)->flags;
ip_fraglist_prepare(skb, &iter);
}
@ -897,7 +886,7 @@ slow_path:
err = PTR_ERR(skb2);
goto fail;
}
ip_frag_ipcb(skb, skb2, first_frag, &state);
ip_frag_ipcb(skb, skb2, first_frag);
/*
* Put this fragment into the sending queue.