tcp: Namespace-ify sysctl_tcp_recovery

Signed-off-by: Eric Dumazet <edumazet@google.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 a7f39e3..d6ed718 100644 (file)
--- a/include/net/netns/ipv4.h
+++ b/include/net/netns/ipv4.h
@@ -129,6 +129,7 @@ struct netns_ipv4 {
        int sysctl_tcp_window_scaling;
        int sysctl_tcp_timestamps;
        int sysctl_tcp_early_retrans;
+       int sysctl_tcp_recovery;
        struct inet_timewait_death_row tcp_death_row;
        int sysctl_max_syn_backlog;
        int sysctl_tcp_fastopen;

diff --git a/include/net/tcp.h b/include/net/tcp.h
index a12b71d..c7f5153 100644 (file)
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -265,7 +265,7 @@ extern int sysctl_tcp_workaround_signed_windows;
 extern int sysctl_tcp_slow_start_after_idle;
 extern int sysctl_tcp_thin_linear_timeouts;
 extern int sysctl_tcp_thin_dupack;
-extern int sysctl_tcp_recovery;
+
 #define TCP_RACK_LOSS_DETECTION  0x1 /* Use RACK to detect losses */
 
 extern int sysctl_tcp_limit_output_bytes;

diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index f0f650f..78019ad 100644 (file)
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -450,13 +450,6 @@ static struct ctl_table ipv4_table[] = {
                .proc_handler   = proc_dointvec
        },
        {
-               .procname       = "tcp_recovery",
-               .data           = &sysctl_tcp_recovery,
-               .maxlen         = sizeof(int),
-               .mode           = 0644,
-               .proc_handler   = proc_dointvec,
-       },
-       {
                .procname       = "tcp_max_reordering",
                .data           = &sysctl_tcp_max_reordering,
                .maxlen         = sizeof(int),
@@ -1145,6 +1138,13 @@ static struct ctl_table ipv4_net_table[] = {
                .extra1         = &zero,
                .extra2         = &four,
        },
+       {
+               .procname       = "tcp_recovery",
+               .data           = &init_net.ipv4.sysctl_tcp_recovery,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = proc_dointvec,
+       },
        { }
 };
 

diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 7656b1e..5b2272d 100644 (file)
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -2788,7 +2788,7 @@ static void tcp_rack_identify_loss(struct sock *sk, int *ack_flag)
        struct tcp_sock *tp = tcp_sk(sk);
 
        /* Use RACK to detect loss */
-       if (sysctl_tcp_recovery & TCP_RACK_LOSS_DETECTION) {
+       if (sock_net(sk)->ipv4.sysctl_tcp_recovery & TCP_RACK_LOSS_DETECTION) {
                u32 prior_retrans = tp->retrans_out;
 
                tcp_rack_mark_lost(sk);

diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 7ab313f..517ff19 100644 (file)
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -2485,6 +2485,7 @@ static int __net_init tcp_sk_init(struct net *net)
        net->ipv4.sysctl_tcp_window_scaling = 1;
        net->ipv4.sysctl_tcp_timestamps = 1;
        net->ipv4.sysctl_tcp_early_retrans = 3;
+       net->ipv4.sysctl_tcp_recovery = TCP_RACK_LOSS_DETECTION;
 
        net->ipv4.sysctl_tcp_fastopen = TFO_CLIENT_ENABLE;
        spin_lock_init(&net->ipv4.tcp_fastopen_ctx_lock);

diff --git a/net/ipv4/tcp_recovery.c b/net/ipv4/tcp_recovery.c
index cda6074..d3603a9 100644 (file)
--- a/net/ipv4/tcp_recovery.c
+++ b/net/ipv4/tcp_recovery.c
@@ -1,8 +1,6 @@
 #include <linux/tcp.h>
 #include <net/tcp.h>
 
-int sysctl_tcp_recovery __read_mostly = TCP_RACK_LOSS_DETECTION;
-
 static void tcp_rack_mark_skb_lost(struct sock *sk, struct sk_buff *skb)
 {
        struct tcp_sock *tp = tcp_sk(sk);