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| author | WANG Cong <xiyou.wangcong@gmail.com> | 2016-06-30 10:15:22 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-07-01 16:19:34 -0400 |
| commit | 82a31b9231f02d9c1b7b290a46999d517b0d312a (patch) | |
| tree | 1da59e437a0c406de78f8d60e2d9a6f880033c6f /include/linux/skbuff.h | |
| parent | eb70db8756717b90c01ccc765fdefc4dd969fc74 (diff) | |
| download | lwn-82a31b9231f02d9c1b7b290a46999d517b0d312a.tar.gz lwn-82a31b9231f02d9c1b7b290a46999d517b0d312a.zip | |
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.h | 19 |
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 |