diff options
| author | Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> | 2007-12-02 00:48:06 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-01-28 14:55:46 -0800 |
| commit | 6859d49475d4f32abe640372117e4b687906e6b6 (patch) | |
| tree | 2133f2e26af6540f2a212c36f219873d34db2c1e /include | |
| parent | 7201883599ac8bff76300117155e299b1a54092f (diff) | |
[TCP]: Abstract tp->highest_sack accessing & point to next skb
Pointing to the next skb is necessary to avoid referencing
already SACKed skbs which will soon be on a separate list.
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
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/net/tcp.h | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h index 6e392babda4..5ec1cacca8a 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -1267,8 +1267,12 @@ static inline void tcp_add_write_queue_tail(struct sock *sk, struct sk_buff *skb __tcp_add_write_queue_tail(sk, skb); /* Queue it, remembering where we must start sending. */ - if (sk->sk_send_head == NULL) + if (sk->sk_send_head == NULL) { sk->sk_send_head = skb; + + if (tcp_sk(sk)->highest_sack == NULL) + tcp_sk(sk)->highest_sack = skb; + } } static inline void __tcp_add_write_queue_head(struct sock *sk, struct sk_buff *skb) @@ -1318,9 +1322,38 @@ static inline u32 tcp_highest_sack_seq(struct tcp_sock *tp) { if (!tp->sacked_out) return tp->snd_una; + + if (tp->highest_sack == NULL) + return tp->snd_nxt; + return TCP_SKB_CB(tp->highest_sack)->seq; } +static inline void tcp_advance_highest_sack(struct sock *sk, struct sk_buff *skb) +{ + tcp_sk(sk)->highest_sack = tcp_skb_is_last(sk, skb) ? NULL : + tcp_write_queue_next(sk, skb); +} + +static inline struct sk_buff *tcp_highest_sack(struct sock *sk) +{ + return tcp_sk(sk)->highest_sack; +} + +static inline void tcp_highest_sack_reset(struct sock *sk) +{ + tcp_sk(sk)->highest_sack = tcp_write_queue_head(sk); +} + +/* Called when old skb is about to be deleted (to be combined with new skb) */ +static inline void tcp_highest_sack_combine(struct sock *sk, + struct sk_buff *old, + struct sk_buff *new) +{ + if (tcp_sk(sk)->sacked_out && (old == tcp_sk(sk)->highest_sack)) + tcp_sk(sk)->highest_sack = new; +} + /* /proc */ enum tcp_seq_states { TCP_SEQ_STATE_LISTENING, |