Revert "net: activity_stats: Stop using obsolete create_proc_read_entry api"

[firefly-linux-kernel-4.4.55.git] / net / core / skbuff.c

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index b2df375ec9c2173a8132b8efa1c3062f0510284b..8616d1147c938808da752734b6cecea260b149b9 100644 (file)
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -79,6 +79,8 @@
 
 struct kmem_cache *skbuff_head_cache __read_mostly;
 static struct kmem_cache *skbuff_fclone_cache __read_mostly;
+int sysctl_max_skb_frags __read_mostly = MAX_SKB_FRAGS;
+EXPORT_SYMBOL(sysctl_max_skb_frags);
 
 /**
  *     skb_panic - private function for out-of-line support
@@ -2945,6 +2947,24 @@ int skb_append_pagefrags(struct sk_buff *skb, struct page *page,
 }
 EXPORT_SYMBOL_GPL(skb_append_pagefrags);
 
+/**
+ *     skb_push_rcsum - push skb and update receive checksum
+ *     @skb: buffer to update
+ *     @len: length of data pulled
+ *
+ *     This function performs an skb_push on the packet and updates
+ *     the CHECKSUM_COMPLETE checksum.  It should be used on
+ *     receive path processing instead of skb_push unless you know
+ *     that the checksum difference is zero (e.g., a valid IP header)
+ *     or you are setting ip_summed to CHECKSUM_NONE.
+ */
+static unsigned char *skb_push_rcsum(struct sk_buff *skb, unsigned len)
+{
+       skb_push(skb, len);
+       skb_postpush_rcsum(skb, skb->data, len);
+       return skb->data;
+}
+
 /**
  *     skb_pull_rcsum - pull skb and update receive checksum
  *     @skb: buffer to update
@@ -4082,9 +4102,9 @@ struct sk_buff *skb_checksum_trimmed(struct sk_buff *skb,
        if (!pskb_may_pull(skb_chk, offset))
                goto err;
 
-       __skb_pull(skb_chk, offset);
+       skb_pull_rcsum(skb_chk, offset);
        ret = skb_chkf(skb_chk);
-       __skb_push(skb_chk, offset);
+       skb_push_rcsum(skb_chk, offset);
 
        if (ret)
                goto err;