diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/netdevice.h | 25 | ||||
| -rw-r--r-- | include/net/checksum.h | 5 |
2 files changed, 28 insertions, 2 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index d115256ed5a2..3aa02457fe4f 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -2321,8 +2321,19 @@ do { \ compute_pseudo(skb, proto)); \ } while (0) +struct gro_remcsum { + int offset; + __wsum delta; +}; + +static inline void skb_gro_remcsum_init(struct gro_remcsum *grc) +{ + grc->delta = 0; +} + static inline void skb_gro_remcsum_process(struct sk_buff *skb, void *ptr, - int start, int offset) + int start, int offset, + struct gro_remcsum *grc) { __wsum delta; @@ -2331,10 +2342,20 @@ static inline void skb_gro_remcsum_process(struct sk_buff *skb, void *ptr, delta = remcsum_adjust(ptr, NAPI_GRO_CB(skb)->csum, start, offset); /* Adjust skb->csum since we changed the packet */ - skb->csum = csum_add(skb->csum, delta); NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta); + + grc->offset = (ptr + offset) - (void *)skb->head; + grc->delta = delta; } +static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb, + struct gro_remcsum *grc) +{ + if (!grc->delta) + return; + + remcsum_unadjust((__sum16 *)(skb->head + grc->offset), grc->delta); +} static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, unsigned short type, diff --git a/include/net/checksum.h b/include/net/checksum.h index e339a9513e29..0a55ac715077 100644 --- a/include/net/checksum.h +++ b/include/net/checksum.h @@ -167,4 +167,9 @@ static inline __wsum remcsum_adjust(void *ptr, __wsum csum, return delta; } +static inline void remcsum_unadjust(__sum16 *psum, __wsum delta) +{ + *psum = csum_fold(csum_sub(delta, *psum)); +} + #endif |