1 files changed, 43 insertions, 11 deletions

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index f8abf68e398..3a2513f0d0c 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -482,22 +482,22 @@ EXPORT_SYMBOL(consume_skb);
  *	reference count dropping and cleans up the skbuff as if it
  *	just came from __alloc_skb().
  */
-int skb_recycle_check(struct sk_buff *skb, int skb_size)
+bool skb_recycle_check(struct sk_buff *skb, int skb_size)
 {
 	struct skb_shared_info *shinfo;
 
 	if (irqs_disabled())
-		return 0;
+		return false;
 
 	if (skb_is_nonlinear(skb) || skb->fclone != SKB_FCLONE_UNAVAILABLE)
-		return 0;
+		return false;
 
 	skb_size = SKB_DATA_ALIGN(skb_size + NET_SKB_PAD);
 	if (skb_end_pointer(skb) - skb->head < skb_size)
-		return 0;
+		return false;
 
 	if (skb_shared(skb) || skb_cloned(skb))
-		return 0;
+		return false;
 
 	skb_release_head_state(skb);
 
@@ -509,7 +509,7 @@ int skb_recycle_check(struct sk_buff *skb, int skb_size)
 	skb->data = skb->head + NET_SKB_PAD;
 	skb_reset_tail_pointer(skb);
 
-	return 1;
+	return true;
 }
 EXPORT_SYMBOL(skb_recycle_check);
 
@@ -532,6 +532,7 @@ static void __copy_skb_header(struct sk_buff *new, const struct sk_buff *old)
 	new->ip_summed		= old->ip_summed;
 	skb_copy_queue_mapping(new, old);
 	new->priority		= old->priority;
+	new->deliver_no_wcard	= old->deliver_no_wcard;
 #if defined(CONFIG_IP_VS) || defined(CONFIG_IP_VS_MODULE)
 	new->ipvs_property	= old->ipvs_property;
 #endif
@@ -569,7 +570,6 @@ static struct sk_buff *__skb_clone(struct sk_buff *n, struct sk_buff *skb)
 	C(len);
 	C(data_len);
 	C(mac_len);
-	C(rxhash);
 	n->hdr_len = skb->nohdr ? skb_headroom(skb) : skb->hdr_len;
 	n->cloned = 1;
 	n->nohdr = 0;
@@ -817,7 +817,7 @@ int pskb_expand_head(struct sk_buff *skb, int nhead, int ntail,
 	memcpy(data + nhead, skb->head, skb->tail - skb->head);
 #endif
 	memcpy(data + size, skb_end_pointer(skb),
-	       sizeof(struct skb_shared_info));
+	       offsetof(struct skb_shared_info, frags[skb_shinfo(skb)->nr_frags]));
 
 	for (i = 0; i < skb_shinfo(skb)->nr_frags; i++)
 		get_page(skb_shinfo(skb)->frags[i].page);
@@ -843,7 +843,9 @@ int pskb_expand_head(struct sk_buff *skb, int nhead, int ntail,
 	skb->network_header   += off;
 	if (skb_mac_header_was_set(skb))
 		skb->mac_header += off;
-	skb->csum_start       += nhead;
+	/* Only adjust this if it actually is csum_start rather than csum */
+	if (skb->ip_summed == CHECKSUM_PARTIAL)
+		skb->csum_start += nhead;
 	skb->cloned   = 0;
 	skb->hdr_len  = 0;
 	skb->nohdr    = 0;
@@ -930,7 +932,8 @@ struct sk_buff *skb_copy_expand(const struct sk_buff *skb,
 	copy_skb_header(n, skb);
 
 	off                  = newheadroom - oldheadroom;
-	n->csum_start       += off;
+	if (n->ip_summed == CHECKSUM_PARTIAL)
+		n->csum_start += off;
 #ifdef NET_SKBUFF_DATA_USES_OFFSET
 	n->transport_header += off;
 	n->network_header   += off;
@@ -2483,7 +2486,6 @@ unsigned char *skb_pull_rcsum(struct sk_buff *skb, unsigned int len)
 	skb_postpull_rcsum(skb, skb->data, len);
 	return skb->data += len;
 }
-
 EXPORT_SYMBOL_GPL(skb_pull_rcsum);
 
 /**
@@ -2965,6 +2967,34 @@ int skb_cow_data(struct sk_buff *skb, int tailbits, struct sk_buff **trailer)
 }
 EXPORT_SYMBOL_GPL(skb_cow_data);
 
+static void sock_rmem_free(struct sk_buff *skb)
+{
+	struct sock *sk = skb->sk;
+
+	atomic_sub(skb->truesize, &sk->sk_rmem_alloc);
+}
+
+/*
+ * Note: We dont mem charge error packets (no sk_forward_alloc changes)
+ */
+int sock_queue_err_skb(struct sock *sk, struct sk_buff *skb)
+{
+	if (atomic_read(&sk->sk_rmem_alloc) + skb->truesize >=
+	    (unsigned)sk->sk_rcvbuf)
+		return -ENOMEM;
+
+	skb_orphan(skb);
+	skb->sk = sk;
+	skb->destructor = sock_rmem_free;
+	atomic_add(skb->truesize, &sk->sk_rmem_alloc);
+
+	skb_queue_tail(&sk->sk_error_queue, skb);
+	if (!sock_flag(sk, SOCK_DEAD))
+		sk->sk_data_ready(sk, skb->len);
+	return 0;
+}
+EXPORT_SYMBOL(sock_queue_err_skb);
+
 void skb_tstamp_tx(struct sk_buff *orig_skb,
 		struct skb_shared_hwtstamps *hwtstamps)
 {
@@ -2996,7 +3026,9 @@ void skb_tstamp_tx(struct sk_buff *orig_skb,
 	memset(serr, 0, sizeof(*serr));
 	serr->ee.ee_errno = ENOMSG;
 	serr->ee.ee_origin = SO_EE_ORIGIN_TIMESTAMPING;
+
 	err = sock_queue_err_skb(sk, skb);
+
 	if (err)
 		kfree_skb(skb);
 }