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| author | David S. Miller <davem@davemloft.net> | 2012-07-09 16:19:30 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-07-10 20:33:49 -0700 |
| commit | ab92bb2f679d66c7e12a6b1c0cdd76fe308f6546 (patch) | |
| tree | 39ba3d67d7691f65a2d67ec782edd83271a2a654 /net | |
| parent | 4aabd8ef8c43677cfee3e1e36c5a79edddb41942 (diff) | |
| download | linux-stable-ab92bb2f679d66c7e12a6b1c0cdd76fe308f6546.tar.gz linux-stable-ab92bb2f679d66c7e12a6b1c0cdd76fe308f6546.tar.bz2 linux-stable-ab92bb2f679d66c7e12a6b1c0cdd76fe308f6546.zip | |
tcp: Abstract back handling peer aliveness test into helper function.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/tcp_ipv4.c | 2 | ||||
| -rw-r--r-- | net/ipv4/tcp_metrics.c | 10 | ||||
| -rw-r--r-- | net/ipv6/tcp_ipv6.c | 2 |
3 files changed, 12 insertions, 2 deletions
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 64568fa21d05..e9312a8f33a1 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -1405,7 +1405,7 @@ int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb) (sysctl_max_syn_backlog - inet_csk_reqsk_queue_len(sk) < (sysctl_max_syn_backlog >> 2)) && (!peer || !peer->tcp_ts_stamp) && - (!dst || !dst_metric(dst, RTAX_RTT))) { + !tcp_peer_is_proven(req, dst)) { /* Without syncookies last quarter of * backlog is filled with destinations, * proven to be alive. diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c index 2793ecf928d3..9afe703c85cc 100644 --- a/net/ipv4/tcp_metrics.c +++ b/net/ipv4/tcp_metrics.c @@ -1,7 +1,9 @@ +#include <linux/module.h> #include <linux/cache.h> #include <linux/tcp.h> #include <net/inet_connection_sock.h> +#include <net/request_sock.h> #include <net/sock.h> #include <net/dst.h> #include <net/tcp.h> @@ -190,3 +192,11 @@ reset: tp->snd_cwnd = tcp_init_cwnd(tp, dst); tp->snd_cwnd_stamp = tcp_time_stamp; } + +bool tcp_peer_is_proven(struct request_sock *req, struct dst_entry *dst) +{ + if (!dst) + return false; + return dst_metric(dst, RTAX_RTT) ? true : false; +} +EXPORT_SYMBOL_GPL(tcp_peer_is_proven); diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index 6cc67ed6c2e6..75d179555c28 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -1177,7 +1177,7 @@ static int tcp_v6_conn_request(struct sock *sk, struct sk_buff *skb) (sysctl_max_syn_backlog - inet_csk_reqsk_queue_len(sk) < (sysctl_max_syn_backlog >> 2)) && (!peer || !peer->tcp_ts_stamp) && - (!dst || !dst_metric(dst, RTAX_RTT))) { + !tcp_peer_is_proven(req, dst)) { /* Without syncookies last quarter of * backlog is filled with destinations, * proven to be alive. |