*
* Implementation of the Transmission Control Protocol(TCP).
*
- * Version: $Id: tcp_timer.c,v 1.88 2002/02/01 22:01:04 davem Exp $
- *
* Authors: Ross Biro
* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
* Mark Evans, <evansmp@uhura.aston.ac.uk>
sk->sk_error_report(sk);
tcp_done(sk);
- NET_INC_STATS_BH(LINUX_MIB_TCPABORTONTIMEOUT);
+ NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPABORTONTIMEOUT);
}
/* Do not allow orphaned sockets to eat all our resources.
if (do_reset)
tcp_send_active_reset(sk, GFP_ATOMIC);
tcp_done(sk);
- NET_INC_STATS_BH(LINUX_MIB_TCPABORTONMEMORY);
+ NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPABORTONMEMORY);
return 1;
}
return 0;
return retries;
}
+static void tcp_mtu_probing(struct inet_connection_sock *icsk, struct sock *sk)
+{
+ /* Black hole detection */
+ if (sysctl_tcp_mtu_probing) {
+ if (!icsk->icsk_mtup.enabled) {
+ icsk->icsk_mtup.enabled = 1;
+ tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
+ } else {
+ struct tcp_sock *tp = tcp_sk(sk);
+ int mss;
+
+ mss = tcp_mtu_to_mss(sk, icsk->icsk_mtup.search_low) >> 1;
+ mss = min(sysctl_tcp_base_mss, mss);
+ mss = max(mss, 68 - tp->tcp_header_len);
+ icsk->icsk_mtup.search_low = tcp_mss_to_mtu(sk, mss);
+ tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
+ }
+ }
+}
+
/* A write timeout has occurred. Process the after effects. */
static int tcp_write_timeout(struct sock *sk)
{
struct inet_connection_sock *icsk = inet_csk(sk);
- struct tcp_sock *tp = tcp_sk(sk);
int retry_until;
- int mss;
if ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) {
if (icsk->icsk_retransmits)
} else {
if (icsk->icsk_retransmits >= sysctl_tcp_retries1) {
/* Black hole detection */
- if (sysctl_tcp_mtu_probing) {
- if (!icsk->icsk_mtup.enabled) {
- icsk->icsk_mtup.enabled = 1;
- tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
- } else {
- mss = min(sysctl_tcp_base_mss,
- tcp_mtu_to_mss(sk, icsk->icsk_mtup.search_low)/2);
- mss = max(mss, 68 - tp->tcp_header_len);
- icsk->icsk_mtup.search_low = tcp_mss_to_mtu(sk, mss);
- tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
- }
- }
+ tcp_mtu_probing(icsk, sk);
dst_negative_advice(&sk->sk_dst_cache);
}
if (sock_owned_by_user(sk)) {
/* Try again later. */
icsk->icsk_ack.blocked = 1;
- NET_INC_STATS_BH(LINUX_MIB_DELAYEDACKLOCKED);
+ NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_DELAYEDACKLOCKED);
sk_reset_timer(sk, &icsk->icsk_delack_timer, jiffies + TCP_DELACK_MIN);
goto out_unlock;
}
- sk_stream_mem_reclaim(sk);
+ sk_mem_reclaim_partial(sk);
if (sk->sk_state == TCP_CLOSE || !(icsk->icsk_ack.pending & ICSK_ACK_TIMER))
goto out;
if (!skb_queue_empty(&tp->ucopy.prequeue)) {
struct sk_buff *skb;
- NET_INC_STATS_BH(LINUX_MIB_TCPSCHEDULERFAILED);
+ NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPSCHEDULERFAILED);
while ((skb = __skb_dequeue(&tp->ucopy.prequeue)) != NULL)
sk->sk_backlog_rcv(sk, skb);
icsk->icsk_ack.ato = TCP_ATO_MIN;
}
tcp_send_ack(sk);
- NET_INC_STATS_BH(LINUX_MIB_DELAYEDACKS);
+ NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_DELAYEDACKS);
}
TCP_CHECK_TIMER(sk);
out:
if (tcp_memory_pressure)
- sk_stream_mem_reclaim(sk);
+ sk_mem_reclaim(sk);
out_unlock:
bh_unlock_sock(sk);
sock_put(sk);
* we cannot allow such beasts to hang infinitely.
*/
#ifdef TCP_DEBUG
- if (1) {
- struct inet_sock *inet = inet_sk(sk);
- LIMIT_NETDEBUG(KERN_DEBUG "TCP: Treason uncloaked! Peer %u.%u.%u.%u:%u/%u shrinks window %u:%u. Repaired.\n",
+ struct inet_sock *inet = inet_sk(sk);
+ if (sk->sk_family == AF_INET) {
+ LIMIT_NETDEBUG(KERN_DEBUG "TCP: Treason uncloaked! Peer " NIPQUAD_FMT ":%u/%u shrinks window %u:%u. Repaired.\n",
NIPQUAD(inet->daddr), ntohs(inet->dport),
inet->num, tp->snd_una, tp->snd_nxt);
}
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ else if (sk->sk_family == AF_INET6) {
+ struct ipv6_pinfo *np = inet6_sk(sk);
+ LIMIT_NETDEBUG(KERN_DEBUG "TCP: Treason uncloaked! Peer " NIP6_FMT ":%u/%u shrinks window %u:%u. Repaired.\n",
+ NIP6(np->daddr), ntohs(inet->dport),
+ inet->num, tp->snd_una, tp->snd_nxt);
+ }
+#endif
#endif
if (tcp_time_stamp - tp->rcv_tstamp > TCP_RTO_MAX) {
tcp_write_err(sk);
goto out;
if (icsk->icsk_retransmits == 0) {
+ int mib_idx;
+
if (icsk->icsk_ca_state == TCP_CA_Disorder ||
icsk->icsk_ca_state == TCP_CA_Recovery) {
if (tcp_is_sack(tp)) {
if (icsk->icsk_ca_state == TCP_CA_Recovery)
- NET_INC_STATS_BH(LINUX_MIB_TCPSACKRECOVERYFAIL);
+ mib_idx = LINUX_MIB_TCPSACKRECOVERYFAIL;
else
- NET_INC_STATS_BH(LINUX_MIB_TCPSACKFAILURES);
+ mib_idx = LINUX_MIB_TCPSACKFAILURES;
} else {
if (icsk->icsk_ca_state == TCP_CA_Recovery)
- NET_INC_STATS_BH(LINUX_MIB_TCPRENORECOVERYFAIL);
+ mib_idx = LINUX_MIB_TCPRENORECOVERYFAIL;
else
- NET_INC_STATS_BH(LINUX_MIB_TCPRENOFAILURES);
+ mib_idx = LINUX_MIB_TCPRENOFAILURES;
}
} else if (icsk->icsk_ca_state == TCP_CA_Loss) {
- NET_INC_STATS_BH(LINUX_MIB_TCPLOSSFAILURES);
+ mib_idx = LINUX_MIB_TCPLOSSFAILURES;
} else {
- NET_INC_STATS_BH(LINUX_MIB_TCPTIMEOUTS);
+ mib_idx = LINUX_MIB_TCPTIMEOUTS;
}
+ NET_INC_STATS_BH(sock_net(sk), mib_idx);
}
if (tcp_use_frto(sk)) {
TCP_CHECK_TIMER(sk);
out:
- sk_stream_mem_reclaim(sk);
+ sk_mem_reclaim(sk);
out_unlock:
bh_unlock_sock(sk);
sock_put(sk);
}
TCP_CHECK_TIMER(sk);
- sk_stream_mem_reclaim(sk);
+ sk_mem_reclaim(sk);
resched:
inet_csk_reset_keepalive_timer (sk, elapsed);