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authorWANG Cong <xiyou.wangcong@gmail.com>2016-06-30 10:15:22 -0700
committerDavid S. Miller <davem@davemloft.net>2016-07-01 16:19:34 -0400
commit82a31b9231f02d9c1b7b290a46999d517b0d312a (patch)
tree1da59e437a0c406de78f8d60e2d9a6f880033c6f /include/linux/skbuff.h
parenteb70db8756717b90c01ccc765fdefc4dd969fc74 (diff)
net_sched: fix mirrored packets checksum
Similar to commit 9b368814b336 ("net: fix bridge multicast packet checksum validation") we need to fixup the checksum for CHECKSUM_COMPLETE when pushing skb on RX path. Otherwise we get similar splats. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Tom Herbert <tom@herbertland.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/skbuff.h')
-rw-r--r--include/linux/skbuff.h19
1 files changed, 19 insertions, 0 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 24859d40acde..f39b37180c41 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -2871,6 +2871,25 @@ static inline void skb_postpush_rcsum(struct sk_buff *skb,
}
/**
+ * 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 inline unsigned char *skb_push_rcsum(struct sk_buff *skb,
+ unsigned int len)
+{
+ skb_push(skb, len);
+ skb_postpush_rcsum(skb, skb->data, len);
+ return skb->data;
+}
+
+/**
* pskb_trim_rcsum - trim received skb and update checksum
* @skb: buffer to trim
* @len: new length