diff options
| author | Herbert Xu <herbert@gondor.apana.org.au> | 2007-04-09 11:59:39 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-04-25 22:28:43 -0700 |
| commit | 604763722c655c7e3f31ecf6f7b4dafcd26a7a15 (patch) | |
| tree | a5c07f0e22ac86e7ca7a8c80bd3f111116610edd /include | |
| parent | 628592ccdbbb5bb751217cf02e2e7abb500d7ffe (diff) | |
[NET]: Treat CHECKSUM_PARTIAL as CHECKSUM_UNNECESSARY
When a transmitted packet is looped back directly, CHECKSUM_PARTIAL
maps to the semantics of CHECKSUM_UNNECESSARY. Therefore we should
treat it as such in the stack.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/skbuff.h | 16 | ||||
| -rw-r--r-- | include/net/tcp.h | 2 | ||||
| -rw-r--r-- | include/net/udp.h | 2 |
3 files changed, 13 insertions, 7 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 910560e8556..c413afbe0b9 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -32,10 +32,11 @@ #define HAVE_ALLOC_SKB /* For the drivers to know */ #define HAVE_ALIGNABLE_SKB /* Ditto 8) */ +/* Don't change this without changing skb_csum_unnecessary! */ #define CHECKSUM_NONE 0 -#define CHECKSUM_PARTIAL 1 -#define CHECKSUM_UNNECESSARY 2 -#define CHECKSUM_COMPLETE 3 +#define CHECKSUM_UNNECESSARY 1 +#define CHECKSUM_COMPLETE 2 +#define CHECKSUM_PARTIAL 3 #define SKB_DATA_ALIGN(X) (((X) + (SMP_CACHE_BYTES - 1)) & \ ~(SMP_CACHE_BYTES - 1)) @@ -1572,6 +1573,11 @@ static inline void __net_timestamp(struct sk_buff *skb) extern __sum16 __skb_checksum_complete_head(struct sk_buff *skb, int len); extern __sum16 __skb_checksum_complete(struct sk_buff *skb); +static inline int skb_csum_unnecessary(const struct sk_buff *skb) +{ + return skb->ip_summed & CHECKSUM_UNNECESSARY; +} + /** * skb_checksum_complete - Calculate checksum of an entire packet * @skb: packet to process @@ -1590,8 +1596,8 @@ extern __sum16 __skb_checksum_complete(struct sk_buff *skb); */ static inline unsigned int skb_checksum_complete(struct sk_buff *skb) { - return skb->ip_summed != CHECKSUM_UNNECESSARY && - __skb_checksum_complete(skb); + return skb_csum_unnecessary(skb) ? + 0 : __skb_checksum_complete(skb); } #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) diff --git a/include/net/tcp.h b/include/net/tcp.h index af9273204cf..07f724e02f8 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -818,7 +818,7 @@ static inline __sum16 __tcp_checksum_complete(struct sk_buff *skb) static inline int tcp_checksum_complete(struct sk_buff *skb) { - return skb->ip_summed != CHECKSUM_UNNECESSARY && + return !skb_csum_unnecessary(skb) && __tcp_checksum_complete(skb); } diff --git a/include/net/udp.h b/include/net/udp.h index 4906ed7113e..98755ebaf16 100644 --- a/include/net/udp.h +++ b/include/net/udp.h @@ -77,7 +77,7 @@ static inline __sum16 __udp_lib_checksum_complete(struct sk_buff *skb) static inline int udp_lib_checksum_complete(struct sk_buff *skb) { - return skb->ip_summed != CHECKSUM_UNNECESSARY && + return !skb_csum_unnecessary(skb) && __udp_lib_checksum_complete(skb); } |