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-rw-r--r--net/core/skbuff.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 345b51837ca8..ff49e352deea 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -1839,6 +1839,20 @@ done:
}
EXPORT_SYMBOL(___pskb_trim);
+/* Note : use pskb_trim_rcsum() instead of calling this directly
+ */
+int pskb_trim_rcsum_slow(struct sk_buff *skb, unsigned int len)
+{
+ if (skb->ip_summed == CHECKSUM_COMPLETE) {
+ int delta = skb->len - len;
+
+ skb->csum = csum_sub(skb->csum,
+ skb_checksum(skb, len, delta, 0));
+ }
+ return __pskb_trim(skb, len);
+}
+EXPORT_SYMBOL(pskb_trim_rcsum_slow);
+
/**
* __pskb_pull_tail - advance tail of skb header
* @skb: buffer to reallocate