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| author |   Herbert Xu <herbert@gondor.apana.org.au> | 2006-03-20 22:43:56 -0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2006-03-20 22:43:56 -0800 |
| commit | cbb042f9e1292434e3cacb90e67d8d381aeac5a9 (patch) | |
| tree | cc42f42232e56b68111cfebdc175197d8607bdd7 /include | |
| parent | [DECnet]: Use RCU locking in dn_rules.c (diff) | |
| download | linux-dev-cbb042f9e1292434e3cacb90e67d8d381aeac5a9.tar.xz linux-dev-cbb042f9e1292434e3cacb90e67d8d381aeac5a9.zip | |
[NET]: Replace skb_pull/skb_postpull_rcsum with skb_pull_rcsum
We're now starting to have quite a number of places that do skb_pull
followed immediately by an skb_postpull_rcsum. We can merge these two
operations into one function with skb_pull_rcsum. This makes sense
since most pull operations on receive skb's need to update the
checksum.
I've decided to make this out-of-line since it is fairly big and the
fast path where hardware checksums are enabled need to call
csum_partial anyway.
Since this is a brand new function we get to add an extra check on the
len argument. As it is most callers of skb_pull ignore its return
value which essentially means that there is no check on the len
argument.
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 | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 75c963103b9f..613b9513f8b9 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -1159,12 +1159,14 @@ static inline int skb_linearize(struct sk_buff *skb, gfp_t gfp) */ static inline void skb_postpull_rcsum(struct sk_buff *skb, - const void *start, int len) + const void *start, unsigned int len) { if (skb->ip_summed == CHECKSUM_HW) skb->csum = csum_sub(skb->csum, csum_partial(start, len, 0)); } +unsigned char *skb_pull_rcsum(struct sk_buff *skb, unsigned int len); + /** * pskb_trim_rcsum - trim received skb and update checksum * @skb: buffer to trim |