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authorArnaldo Carvalho de Melo <acme@mandriva.com>2005-12-13 23:26:10 -0800
committerDavid S. Miller <davem@sunset.davemloft.net>2006-01-03 13:10:58 -0800
commitd83d8461f902c672bc1bd8fbc6a94e19f092da97 (patch)
tree0534c553ab92baa2eb9dbb5bba64f2c4540b1e89 /net/ipv4/tcp_output.c
parent22712813620fa8e682dbfb253a60ca0131da1e07 (diff)
downloadlwn-d83d8461f902c672bc1bd8fbc6a94e19f092da97.tar.gz
lwn-d83d8461f902c672bc1bd8fbc6a94e19f092da97.zip
[IP_SOCKGLUE]: Remove most of the tcp specific calls
As DCCP needs to be called in the same spots. Now we have a member in inet_sock (is_icsk), set at sock creation time from struct inet_protosw->flags (if INET_PROTOSW_ICSK is set, like for TCP and DCCP) to see if a struct sock instance is a inet_connection_sock for places like the ones in ip_sockglue.c (v4 and v6) where we previously were looking if sk_type was SOCK_STREAM, that is insufficient because we now use the same code for DCCP, that has sk_type SOCK_DCCP. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_output.c')
-rw-r--r--net/ipv4/tcp_output.c18
1 files changed, 10 insertions, 8 deletions
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index af1946c52c37..3a0a914de917 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -621,7 +621,7 @@ int tcp_trim_head(struct sock *sk, struct sk_buff *skb, u32 len)
It is minimum of user_mss and mss received with SYN.
It also does not include TCP options.
- tp->pmtu_cookie is last pmtu, seen by this function.
+ inet_csk(sk)->icsk_pmtu_cookie is last pmtu, seen by this function.
tp->mss_cache is current effective sending mss, including
all tcp options except for SACKs. It is evaluated,
@@ -631,17 +631,18 @@ int tcp_trim_head(struct sock *sk, struct sk_buff *skb, u32 len)
NOTE1. rfc1122 clearly states that advertised MSS
DOES NOT include either tcp or ip options.
- NOTE2. tp->pmtu_cookie and tp->mss_cache are READ ONLY outside
- this function. --ANK (980731)
+ NOTE2. inet_csk(sk)->icsk_pmtu_cookie and tp->mss_cache
+ are READ ONLY outside this function. --ANK (980731)
*/
unsigned int tcp_sync_mss(struct sock *sk, u32 pmtu)
{
struct tcp_sock *tp = tcp_sk(sk);
+ struct inet_connection_sock *icsk = inet_csk(sk);
/* Calculate base mss without TCP options:
It is MMS_S - sizeof(tcphdr) of rfc1122
*/
- int mss_now = (pmtu - inet_csk(sk)->icsk_af_ops->net_header_len -
+ int mss_now = (pmtu - icsk->icsk_af_ops->net_header_len -
sizeof(struct tcphdr));
/* Clamp it (mss_clamp does not include tcp options) */
@@ -649,7 +650,7 @@ unsigned int tcp_sync_mss(struct sock *sk, u32 pmtu)
mss_now = tp->rx_opt.mss_clamp;
/* Now subtract optional transport overhead */
- mss_now -= tp->ext_header_len;
+ mss_now -= icsk->icsk_ext_hdr_len;
/* Then reserve room for full set of TCP options and 8 bytes of data */
if (mss_now < 48)
@@ -663,7 +664,7 @@ unsigned int tcp_sync_mss(struct sock *sk, u32 pmtu)
mss_now = max((tp->max_window>>1), 68U - tp->tcp_header_len);
/* And store cached results */
- tp->pmtu_cookie = pmtu;
+ icsk->icsk_pmtu_cookie = pmtu;
tp->mss_cache = mss_now;
return mss_now;
@@ -693,7 +694,7 @@ unsigned int tcp_current_mss(struct sock *sk, int large_allowed)
if (dst) {
u32 mtu = dst_mtu(dst);
- if (mtu != tp->pmtu_cookie)
+ if (mtu != inet_csk(sk)->icsk_pmtu_cookie)
mss_now = tcp_sync_mss(sk, mtu);
}
@@ -706,7 +707,8 @@ unsigned int tcp_current_mss(struct sock *sk, int large_allowed)
if (doing_tso) {
xmit_size_goal = (65535 -
inet_csk(sk)->icsk_af_ops->net_header_len -
- tp->ext_header_len - tp->tcp_header_len);
+ inet_csk(sk)->icsk_ext_hdr_len -
+ tp->tcp_header_len);
if (tp->max_window &&
(xmit_size_goal > (tp->max_window >> 1)))