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[TCP]: Seperate DSACK from SACK fast path

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Move DSACK code outside the SACK fast-path checking code. If the DSACK
determined that the information was too old we stayed with a partial cache
copied. Most likely this matters very little since the next packet will not be
DSACK and we will find it in the cache. but it's still not good form and there
is little reason to couple the two checks.

Since the SACK receive cache doesn't need the data to be in host order we also
remove the ntohl in the checking loop.

Signed-off-by: Baruch Even <baruch@ev-en.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Baruch Even 2007-02-04 23:36:42 -08:00 • committed by David S. Miller
parent fda03fbb56
commit 6f74651ae6
2 changed files with 32 additions and 36 deletions
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2
include/linux/tcp.h
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@ -316,7 +316,7 @@ struct tcp_sock {
struct tcp_sack_block duplicate_sack[1]; /* D-SACK block */
struct tcp_sack_block selective_acks[4]; /* The SACKS themselves*/
struct tcp_sack_block recv_sack_cache[4];
struct tcp_sack_block_wire recv_sack_cache[4];
/* from STCP, retrans queue hinting */
struct sk_buff* lost_skb_hint;