| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.0 002/220] net: add skb_checksum_complete_unset | Date | Sat, 2 May 2015 20:58:37 +0200 |
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4.0-stable review patch. If anyone has any objections, please let me know.
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From: Tom Herbert <tom@herbertland.com>
[ Upstream commit 4e18b9adf2f910ec4d30b811a74a5b626e6c6125 ]
This function changes ip_summed to CHECKSUM_NONE if CHECKSUM_COMPLETE is set. This is called to discard checksum-complete when packet is being modified and checksum is not pulled for headers in a layer.
Signed-off-by: Tom Herbert <tom@herbertland.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- include/linux/skbuff.h | 12 ++++++++++++ 1 file changed, 12 insertions(+)
--- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -3013,6 +3013,18 @@ static inline bool __skb_checksum_valida */ #define CHECKSUM_BREAK 76 +/* Unset checksum-complete + * + * Unset checksum complete can be done when packet is being modified + * (uncompressed for instance) and checksum-complete value is + * invalidated. + */ +static inline void skb_checksum_complete_unset(struct sk_buff *skb) +{ + if (skb->ip_summed == CHECKSUM_COMPLETE) + skb->ip_summed = CHECKSUM_NONE; +} + /* Validate (init) checksum based on checksum complete. * * Return values:
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