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net: Create and use new helper xfrm_dst_child().

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Only IPSEC routes have a non-NULL dst->child pointer.  And IPSEC
routes are identified by a non-NULL dst->xfrm pointer.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Miller
2017-11-28 15:40:22 -05:00
committed by David S. Miller
parent 071fb37ec4
commit b92cf4aab8
8 changed files with 26 additions and 15 deletions
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2
net/ipv4/xfrm4_mode_tunnel.c
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@@ -62,7 +62,7 @@ static int xfrm4_mode_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
top_iph->frag_off = (flags & XFRM_STATE_NOPMTUDISC) ?
0 : (XFRM_MODE_SKB_CB(skb)->frag_off & htons(IP_DF));
top_iph->ttl = ip4_dst_hoplimit(dst->child);
top_iph->ttl = ip4_dst_hoplimit(xfrm_dst_child(dst));
top_iph->saddr = x->props.saddr.a4;
top_iph->daddr = x->id.daddr.a4;