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net: xfrm: use skb_list_walk_safe helper for gso segments

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This is converts xfrm segment iteration to use the new function, keeping
the flow of the existing code as intact as possible. One case is very
straight-forward, whereas the other case has some more subtle code that
likes to peak at ->next and relink skbs. By keeping the variables the
same as before, we can upgrade this code with minimal surgery required.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jason A. Donenfeld
2020-01-13 18:42:28 -05:00
committed by David S. Miller
parent 1a186c14ce
commit c3b18e0d92
2 changed files with 7 additions and 17 deletions
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9
net/xfrm/xfrm_output.c
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@@ -533,7 +533,7 @@ static int xfrm_output2(struct net *net, struct sock *sk, struct sk_buff *skb)
static int xfrm_output_gso(struct net *net, struct sock *sk, struct sk_buff *skb)
{
struct sk_buff *segs;
struct sk_buff *segs, *nskb;
BUILD_BUG_ON(sizeof(*IPCB(skb)) > SKB_SGO_CB_OFFSET);
BUILD_BUG_ON(sizeof(*IP6CB(skb)) > SKB_SGO_CB_OFFSET);
@@ -544,8 +544,7 @@ static int xfrm_output_gso(struct net *net, struct sock *sk, struct sk_buff *skb
if (segs == NULL)
return -EINVAL;
do {
struct sk_buff *nskb = segs->next;
skb_list_walk_safe(segs, segs, nskb) {
int err;
skb_mark_not_on_list(segs);
@@ -555,9 +554,7 @@ static int xfrm_output_gso(struct net *net, struct sock *sk, struct sk_buff *skb
kfree_skb_list(nskb);
return err;
}
segs = nskb;
} while (segs);
}
return 0;
}