7 files changed, 12 insertions, 37 deletions

diff --git a/net/ipv4/ah4.c b/net/ipv4/ah4.c
index d69706405d58..60925fedbf16 100644
--- a/net/ipv4/ah4.c
+++ b/net/ipv4/ah4.c
@@ -115,8 +115,6 @@ static int ah_output(struct xfrm_state *x, struct sk_buff *skb)
                 memcpy(top_iph+1, iph+1, top_iph->ihl*4 - sizeof(struct iphdr));
         }
 
-        ip_send_check(top_iph);
-
         err = 0;
 
 error:
diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c
index 66eb4968b910..8377bedf3f66 100644
--- a/net/ipv4/esp4.c
+++ b/net/ipv4/esp4.c
@@ -16,7 +16,6 @@
 static int esp_output(struct xfrm_state *x, struct sk_buff *skb)
 {
         int err;
-        struct iphdr *top_iph;
         struct ip_esp_hdr *esph;
         struct crypto_blkcipher *tfm;
         struct blkcipher_desc desc;
@@ -59,9 +58,7 @@ static int esp_output(struct xfrm_state *x, struct sk_buff *skb)
         pskb_put(skb, trailer, clen - skb->len);
 
         skb_push(skb, -skb_network_offset(skb));
-        top_iph = ip_hdr(skb);
         esph = ip_esp_hdr(skb);
-        top_iph->tot_len = htons(skb->len + alen);
         *(skb_tail_pointer(trailer) - 1) = *skb_mac_header(skb);
         *skb_mac_header(skb) = IPPROTO_ESP;
 
@@ -76,7 +73,7 @@ static int esp_output(struct xfrm_state *x, struct sk_buff *skb)
                 uh = (struct udphdr *)esph;
                 uh->source = encap->encap_sport;
                 uh->dest = encap->encap_dport;
-                uh->len = htons(skb->len + alen - top_iph->ihl*4);
+                uh->len = htons(skb->len + alen - skb_transport_offset(skb));
                 uh->check = 0;
 
                 switch (encap->encap_type) {
@@ -136,8 +133,6 @@ static int esp_output(struct xfrm_state *x, struct sk_buff *skb)
 unlock:
         spin_unlock_bh(&x->lock);
 
-        ip_send_check(top_iph);
-
 error:
         return err;
 }
diff --git a/net/ipv4/ipcomp.c b/net/ipv4/ipcomp.c
index 78d6ddb02d1d..32b02deca2ec 100644
--- a/net/ipv4/ipcomp.c
+++ b/net/ipv4/ipcomp.c
@@ -98,10 +98,9 @@ out:
 static int ipcomp_compress(struct xfrm_state *x, struct sk_buff *skb)
 {
         struct ipcomp_data *ipcd = x->data;
-        const int ihlen = skb_transport_offset(skb);
-        const int plen = skb->len - ihlen;
+        const int plen = skb->len;
         int dlen = IPCOMP_SCRATCH_SIZE;
-        u8 *start = skb_transport_header(skb);
+        u8 *start = skb->data;
         const int cpu = get_cpu();
         u8 *scratch = *per_cpu_ptr(ipcomp_scratches, cpu);
         struct crypto_comp *tfm = *per_cpu_ptr(ipcd->tfms, cpu);
@@ -118,7 +117,7 @@ static int ipcomp_compress(struct xfrm_state *x, struct sk_buff *skb)
         memcpy(start + sizeof(struct ip_comp_hdr), scratch, dlen);
         put_cpu();
 
-        pskb_trim(skb, ihlen + dlen + sizeof(struct ip_comp_hdr));
+        pskb_trim(skb, dlen + sizeof(struct ip_comp_hdr));
         return 0;
 
 out:
@@ -131,13 +130,8 @@ static int ipcomp_output(struct xfrm_state *x, struct sk_buff *skb)
         int err;
         struct ip_comp_hdr *ipch;
         struct ipcomp_data *ipcd = x->data;
-        int hdr_len = 0;
-        struct iphdr *iph = ip_hdr(skb);
 
-        skb_push(skb, -skb_network_offset(skb));
-        iph->tot_len = htons(skb->len);
-        hdr_len = iph->ihl * 4;
-        if ((skb->len - hdr_len) < ipcd->threshold) {
+        if (skb->len < ipcd->threshold) {
                 /* Don't bother compressing */
                 goto out_ok;
         }
@@ -146,25 +140,19 @@ static int ipcomp_output(struct xfrm_state *x, struct sk_buff *skb)
                 goto out_ok;
 
         err = ipcomp_compress(x, skb);
-        iph = ip_hdr(skb);
 
         if (err) {
                 goto out_ok;
         }
 
         /* Install ipcomp header, convert into ipcomp datagram. */
-        iph->tot_len = htons(skb->len);
         ipch = ip_comp_hdr(skb);
         ipch->nexthdr = *skb_mac_header(skb);
         ipch->flags = 0;
         ipch->cpi = htons((u16 )ntohl(x->id.spi));
         *skb_mac_header(skb) = IPPROTO_COMP;
-        ip_send_check(iph);
-        return 0;
-
 out_ok:
-        if (x->props.mode == XFRM_MODE_TUNNEL)
-                ip_send_check(iph);
+        skb_push(skb, -skb_network_offset(skb));
         return 0;
 }
 
diff --git a/net/ipv4/xfrm4_mode_beet.c b/net/ipv4/xfrm4_mode_beet.c
index 7226c6486c01..73d2338bec55 100644
--- a/net/ipv4/xfrm4_mode_beet.c
+++ b/net/ipv4/xfrm4_mode_beet.c
@@ -20,9 +20,6 @@
 /* Add encapsulation header.
  *
  * The top IP header will be constructed per draft-nikander-esp-beet-mode-06.txt.
- * The following fields in it shall be filled in by x->type->output:
- *      tot_len
- *      check
  */
 static int xfrm4_beet_output(struct xfrm_state *x, struct sk_buff *skb)
 {
diff --git a/net/ipv4/xfrm4_mode_tunnel.c b/net/ipv4/xfrm4_mode_tunnel.c
index f1d41ea34785..1ae9d32276f0 100644
--- a/net/ipv4/xfrm4_mode_tunnel.c
+++ b/net/ipv4/xfrm4_mode_tunnel.c
@@ -31,10 +31,7 @@ static inline void ipip6_ecn_decapsulate(struct iphdr *iph, struct sk_buff *skb)
 
 /* Add encapsulation header.
  *
- * The top IP header will be constructed per RFC 2401.  The following fields
- * in it shall be filled in by x->type->output:
- *      tot_len
- *      check
+ * The top IP header will be constructed per RFC 2401.
  */
 static int xfrm4_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
 {
diff --git a/net/ipv4/xfrm4_output.c b/net/ipv4/xfrm4_output.c
index 04805c7d79c3..434ef302ba83 100644
--- a/net/ipv4/xfrm4_output.c
+++ b/net/ipv4/xfrm4_output.c
@@ -44,6 +44,7 @@ static inline int xfrm4_output_one(struct sk_buff *skb)
 {
         struct dst_entry *dst = skb->dst;
         struct xfrm_state *x = dst->xfrm;
+        struct iphdr *iph;
         int err;
 
         if (x->props.mode == XFRM_MODE_TUNNEL) {
@@ -56,6 +57,10 @@ static inline int xfrm4_output_one(struct sk_buff *skb)
         if (err)
                 goto error_nolock;
 
+        iph = ip_hdr(skb);
+        iph->tot_len = htons(skb->len);
+        ip_send_check(iph);
+
         IPCB(skb)->flags |= IPSKB_XFRM_TRANSFORMED;
         err = 0;
 
diff --git a/net/ipv4/xfrm4_tunnel.c b/net/ipv4/xfrm4_tunnel.c
index be572f918b5e..e1fafc1562d8 100644
--- a/net/ipv4/xfrm4_tunnel.c
+++ b/net/ipv4/xfrm4_tunnel.c
@@ -12,12 +12,7 @@
 
 static int ipip_output(struct xfrm_state *x, struct sk_buff *skb)
 {
-        struct iphdr *iph = ip_hdr(skb);
-
         skb_push(skb, -skb_network_offset(skb));
-        iph->tot_len = htons(skb->len);
-        ip_send_check(iph);
-
         return 0;
 }