X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=net%2Fxfrm%2Fxfrm_output.c;h=3f964db908a71466e77949568d6ea672c63f281c;hb=ffd8211fb18e1052b2d9eded629cc3c0b872d06a;hp=569d377932c4b5457b2512f712ac140d00b05704;hpb=989b0b930218661b504bbb056b309e2c7bcdfb86;p=linux-2.6

diff --git a/net/xfrm/xfrm_output.c b/net/xfrm/xfrm_output.c
index 569d377932..3f964db908 100644
--- a/net/xfrm/xfrm_output.c
+++ b/net/xfrm/xfrm_output.c
@@ -25,11 +25,11 @@ static int xfrm_state_check_space(struct xfrm_state *x, struct sk_buff *skb)
 	struct dst_entry *dst = skb->dst;
 	int nhead = dst->header_len + LL_RESERVED_SPACE(dst->dev)
 		- skb_headroom(skb);
+	int ntail = dst->dev->needed_tailroom - skb_tailroom(skb);
 
-	if (nhead > 0)
-		return pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
+	if (nhead > 0 || ntail > 0)
+		return pskb_expand_head(skb, nhead, ntail, GFP_ATOMIC);
 
-	/* Check tail too... */
 	return 0;
 }
 
@@ -124,7 +124,7 @@ int xfrm_output_resume(struct sk_buff *skb, int err)
 		if (!x)
 			return dst_output(skb);
 
-		err = nf_hook(x->inner_mode->afinfo->family,
+		err = nf_hook(skb->dst->ops->family,
 			      NF_INET_POST_ROUTING, skb,
 			      NULL, skb->dst->dev, xfrm_output2);
 		if (unlikely(err != 1))
@@ -150,7 +150,7 @@ static int xfrm_output_gso(struct sk_buff *skb)
 
 	segs = skb_gso_segment(skb, 0);
 	kfree_skb(skb);
-	if (unlikely(IS_ERR(segs)))
+	if (IS_ERR(segs))
 		return PTR_ERR(segs);
 
 	do {
@@ -193,4 +193,20 @@ int xfrm_output(struct sk_buff *skb)
 
 	return xfrm_output2(skb);
 }
+
+int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb)
+{
+	struct xfrm_mode *inner_mode;
+	if (x->sel.family == AF_UNSPEC)
+		inner_mode = xfrm_ip2inner_mode(x,
+				xfrm_af2proto(skb->dst->ops->family));
+	else
+		inner_mode = x->inner_mode;
+
+	if (inner_mode == NULL)
+		return -EAFNOSUPPORT;
+	return inner_mode->afinfo->extract_output(x, skb);
+}
+
 EXPORT_SYMBOL_GPL(xfrm_output);
+EXPORT_SYMBOL_GPL(xfrm_inner_extract_output);