ipv4: Namespaceify tcp_fin_timeout sysctl knob

Signed-off-by: Nikolay Borisov <kernel@kyup.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h
index 0802303..de5ff43 100644 (file)
--- a/include/net/netns/ipv4.h
+++ b/include/net/netns/ipv4.h
@@ -105,6 +105,7 @@ struct netns_ipv4 {
        int sysctl_tcp_retries1;
        int sysctl_tcp_retries2;
        int sysctl_tcp_orphan_retries;
+       int sysctl_tcp_fin_timeout;
 
        struct ping_group_range ping_group_range;
 

diff --git a/include/net/tcp.h b/include/net/tcp.h
index 71f840b..3f160c2 100644 (file)
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -239,7 +239,6 @@ extern struct inet_timewait_death_row tcp_death_row;
 extern int sysctl_tcp_timestamps;
 extern int sysctl_tcp_window_scaling;
 extern int sysctl_tcp_sack;
-extern int sysctl_tcp_fin_timeout;
 extern int sysctl_tcp_fastopen;
 extern int sysctl_tcp_retrans_collapse;
 extern int sysctl_tcp_stdurg;
@@ -1249,7 +1248,7 @@ static inline u32 keepalive_time_elapsed(const struct tcp_sock *tp)
 
 static inline int tcp_fin_time(const struct sock *sk)
 {
-       int fin_timeout = tcp_sk(sk)->linger2 ? : sysctl_tcp_fin_timeout;
+       int fin_timeout = tcp_sk(sk)->linger2 ? : sock_net(sk)->ipv4.sysctl_tcp_fin_timeout;
        const int rto = inet_csk(sk)->icsk_rto;
 
        if (fin_timeout < (rto << 2) - (rto >> 1))

diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index b7af633..8bd335a 100644 (file)
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -319,13 +319,6 @@ static struct ctl_table ipv4_table[] = {
                .mode           = 0644,
                .proc_handler   = proc_dointvec
        },
-       {
-               .procname       = "tcp_fin_timeout",
-               .data           = &sysctl_tcp_fin_timeout,
-               .maxlen         = sizeof(int),
-               .mode           = 0644,
-               .proc_handler   = proc_dointvec_jiffies,
-       },
        {
                .procname       = "tcp_fastopen",
                .data           = &sysctl_tcp_fastopen,
@@ -960,6 +953,13 @@ static struct ctl_table ipv4_net_table[] = {
                .mode           = 0644,
                .proc_handler   = proc_dointvec
        },
+       {
+               .procname       = "tcp_fin_timeout",
+               .data           = &init_net.ipv4.sysctl_tcp_fin_timeout,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = proc_dointvec_jiffies,
+       },
        { }
 };
 

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index f4db6b0..014f18e 100644 (file)
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -282,8 +282,6 @@
 #include <asm/unaligned.h>
 #include <net/busy_poll.h>
 
-int sysctl_tcp_fin_timeout __read_mostly = TCP_FIN_TIMEOUT;
-
 int sysctl_tcp_min_tso_segs __read_mostly = 2;
 
 int sysctl_tcp_autocorking __read_mostly = 1;
@@ -2330,6 +2328,7 @@ static int do_tcp_setsockopt(struct sock *sk, int level,
 {
        struct tcp_sock *tp = tcp_sk(sk);
        struct inet_connection_sock *icsk = inet_csk(sk);
+       struct net *net = sock_net(sk);
        int val;
        int err = 0;
 
@@ -2526,7 +2525,7 @@ static int do_tcp_setsockopt(struct sock *sk, int level,
        case TCP_LINGER2:
                if (val < 0)
                        tp->linger2 = -1;
-               else if (val > sysctl_tcp_fin_timeout / HZ)
+               else if (val > net->ipv4.sysctl_tcp_fin_timeout / HZ)
                        tp->linger2 = 0;
                else
                        tp->linger2 = val * HZ;
@@ -2771,7 +2770,7 @@ static int do_tcp_getsockopt(struct sock *sk, int level,
        case TCP_LINGER2:
                val = tp->linger2;
                if (val >= 0)
-                       val = (val ? : sysctl_tcp_fin_timeout) / HZ;
+                       val = (val ? : net->ipv4.sysctl_tcp_fin_timeout) / HZ;
                break;
        case TCP_DEFER_ACCEPT:
                val = retrans_to_secs(icsk->icsk_accept_queue.rskq_defer_accept,

diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 1240dd6..36c83c2 100644 (file)
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -2394,6 +2394,7 @@ static int __net_init tcp_sk_init(struct net *net)
        net->ipv4.sysctl_tcp_retries1 = TCP_RETR1;
        net->ipv4.sysctl_tcp_retries2 = TCP_RETR2;
        net->ipv4.sysctl_tcp_orphan_retries = 0;
+       net->ipv4.sysctl_tcp_fin_timeout = TCP_FIN_TIMEOUT;
 
        return 0;
 fail: