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Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6

Browse Source 
Conflicts:
	net/ipv4/Kconfig
	net/ipv4/tcp_timer.c
This commit is contained in:
David S. Miller
2010-10-04 11:56:38 -07:00
parent c7d4426a98 51e97a12be
commit 21a180cda0
21 changed files with 124 additions and 59 deletions
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25
net/ipv4/tcp_timer.c
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@ -135,13 +135,16 @@ static void tcp_mtu_probing(struct inet_connection_sock *icsk, struct sock *sk)
/* This function calculates a "timeout" which is equivalent to the timeout of a
* TCP connection after "boundary" unsuccessful, exponentially backed-off
* retransmissions with an initial RTO of TCP_RTO_MIN.
* retransmissions with an initial RTO of TCP_RTO_MIN or TCP_TIMEOUT_INIT if
* syn_set flag is set.
*/
static bool retransmits_timed_out(struct sock *sk,
unsigned int boundary,
unsigned int timeout)
unsigned int timeout,
bool syn_set)
{
unsigned int linear_backoff_thresh, start_ts;
unsigned int rto_base = syn_set ? TCP_TIMEOUT_INIT : TCP_RTO_MIN;
if (!inet_csk(sk)->icsk_retransmits)
return false;
@ -152,12 +155,12 @@ static bool retransmits_timed_out(struct sock *sk,
start_ts = tcp_sk(sk)->retrans_stamp;
if (likely(timeout == 0)) {
linear_backoff_thresh = ilog2(TCP_RTO_MAX/TCP_RTO_MIN);
linear_backoff_thresh = ilog2(TCP_RTO_MAX/rto_base);
if (boundary <= linear_backoff_thresh)
timeout = ((2 << boundary) - 1) * TCP_RTO_MIN;
timeout = ((2 << boundary) - 1) * rto_base;
else
timeout = ((2 << linear_backoff_thresh) - 1) * TCP_RTO_MIN +
timeout = ((2 << linear_backoff_thresh) - 1) * rto_base +
(boundary - linear_backoff_thresh) * TCP_RTO_MAX;
}
return (tcp_time_stamp - start_ts) >= timeout;
@ -168,14 +171,15 @@ static int tcp_write_timeout(struct sock *sk)
{
struct inet_connection_sock *icsk = inet_csk(sk);
int retry_until;
bool do_reset;
bool do_reset, syn_set = 0;
if ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) {
if (icsk->icsk_retransmits)
dst_negative_advice(sk);
retry_until = icsk->icsk_syn_retries ? : sysctl_tcp_syn_retries;
syn_set = 1;
} else {
if (retransmits_timed_out(sk, sysctl_tcp_retries1, 0)) {
if (retransmits_timed_out(sk, sysctl_tcp_retries1, 0, 0)) {
/* Black hole detection */
tcp_mtu_probing(icsk, sk);
@ -188,7 +192,7 @@ static int tcp_write_timeout(struct sock *sk)
retry_until = tcp_orphan_retries(sk, alive);
do_reset = alive ||
!retransmits_timed_out(sk, retry_until, 0);
!retransmits_timed_out(sk, retry_until, 0, 0);
if (tcp_out_of_resources(sk, do_reset))
return 1;
@ -196,8 +200,7 @@ static int tcp_write_timeout(struct sock *sk)
}
if (retransmits_timed_out(sk, retry_until,
(1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV) ? 0 :
icsk->icsk_user_timeout)) {
syn_set ? 0 : icsk->icsk_user_timeout, syn_set)) {
/* Has it gone just too far? */
tcp_write_err(sk);
return 1;
@ -439,7 +442,7 @@ out_reset_timer:
icsk->icsk_rto = min(icsk->icsk_rto << 1, TCP_RTO_MAX);
}
inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS, icsk->icsk_rto, TCP_RTO_MAX);
if (retransmits_timed_out(sk, sysctl_tcp_retries1 + 1, 0))
if (retransmits_timed_out(sk, sysctl_tcp_retries1 + 1, 0, 0))
__sk_dst_reset(sk);
out:;