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| author |   Herbert Xu <herbert@gondor.apana.org.au> | 2011-03-01 02:36:47 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2011-03-01 12:35:03 -0800 |
| commit | 1c32c5ad6fac8cee1a77449f5abf211e911ff830 (patch) | |
| tree | 6a7384abb34068adb298beb1967b11201d52ed48 /include | |
| parent | inet: Remove explicit write references to sk/inet in ip_append_data (diff) | |
| download | linux-dev-1c32c5ad6fac8cee1a77449f5abf211e911ff830.tar.xz linux-dev-1c32c5ad6fac8cee1a77449f5abf211e911ff830.zip | |
inet: Add ip_make_skb and ip_finish_skb
This patch adds the helper ip_make_skb which is like ip_append_data
and ip_push_pending_frames all rolled into one, except that it does
not send the skb produced. The sending part is carried out by
ip_send_skb, which the transport protocol can call after it has
tweaked the skb.
It is meant to be called in cases where corking is not used should
have a one-to-one correspondence to sendmsg.
This patch also adds the helper ip_finish_skb which is meant to
be replace ip_push_pending_frames when corking is required.
Previously the protocol stack would peek at the socket write
queue and add its header to the first packet. With ip_finish_skb,
the protocol stack can directly operate on the final skb instead,
just like the non-corking case with ip_make_skb.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/ip.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/net/ip.h b/include/net/ip.h index 67fac78a186b..a4f631108c54 100644 --- a/include/net/ip.h +++ b/include/net/ip.h @@ -116,8 +116,24 @@ extern int ip_append_data(struct sock *sk, extern int ip_generic_getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb); extern ssize_t ip_append_page(struct sock *sk, struct page *page, int offset, size_t size, int flags); +extern struct sk_buff *__ip_make_skb(struct sock *sk, + struct sk_buff_head *queue, + struct inet_cork *cork); +extern int ip_send_skb(struct sk_buff *skb); extern int ip_push_pending_frames(struct sock *sk); extern void ip_flush_pending_frames(struct sock *sk); +extern struct sk_buff *ip_make_skb(struct sock *sk, + int getfrag(void *from, char *to, int offset, int len, + int odd, struct sk_buff *skb), + void *from, int length, int transhdrlen, + struct ipcm_cookie *ipc, + struct rtable **rtp, + unsigned int flags); + +static inline struct sk_buff *ip_finish_skb(struct sock *sk) +{ + return __ip_make_skb(sk, &sk->sk_write_queue, &inet_sk(sk)->cork); +} /* datagram.c */ extern int ip4_datagram_connect(struct sock *sk, |