tcp: Namespace-ify sysctl_tcp_stdurg

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 b28c172..ffa2cf3 100644 (file)
--- a/include/net/netns/ipv4.h
+++ b/include/net/netns/ipv4.h
@@ -133,6 +133,7 @@ struct netns_ipv4 {
        int sysctl_tcp_thin_linear_timeouts;
        int sysctl_tcp_slow_start_after_idle;
        int sysctl_tcp_retrans_collapse;
+       int sysctl_tcp_stdurg;
        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 33cc863..cf3fac7 100644 (file)
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -243,7 +243,6 @@ void tcp_time_wait(struct sock *sk, int state, int timeo);
 
 
 /* sysctl variables for tcp */
-extern int sysctl_tcp_stdurg;
 extern int sysctl_tcp_rfc1337;
 extern int sysctl_tcp_abort_on_overflow;
 extern int sysctl_tcp_max_orphans;

diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index 533b92a..a34bb75 100644 (file)
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -400,13 +400,6 @@ static struct ctl_table ipv4_table[] = {
                .mode           = 0644,
                .proc_handler   = proc_dointvec
        },
-       {
-               .procname       = "tcp_stdurg",
-               .data           = &sysctl_tcp_stdurg,
-               .maxlen         = sizeof(int),
-               .mode           = 0644,
-               .proc_handler   = proc_dointvec
-       },
        {
                .procname       = "tcp_rfc1337",
                .data           = &sysctl_tcp_rfc1337,
@@ -1145,6 +1138,13 @@ static struct ctl_table ipv4_net_table[] = {
                .mode           = 0644,
                .proc_handler   = proc_dointvec
        },
+       {
+               .procname       = "tcp_stdurg",
+               .data           = &init_net.ipv4.sysctl_tcp_stdurg,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = proc_dointvec
+       },
        { }
 };
 

diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 5b2272d..14b0696 100644 (file)
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -89,7 +89,6 @@ EXPORT_SYMBOL(sysctl_tcp_adv_win_scale);
 /* rfc5961 challenge ack rate limiting */
 int sysctl_tcp_challenge_ack_limit = 1000;
 
-int sysctl_tcp_stdurg __read_mostly;
 int sysctl_tcp_rfc1337 __read_mostly;
 int sysctl_tcp_max_orphans __read_mostly = NR_FILE;
 int sysctl_tcp_frto __read_mostly = 2;
@@ -5123,7 +5122,7 @@ static void tcp_check_urg(struct sock *sk, const struct tcphdr *th)
        struct tcp_sock *tp = tcp_sk(sk);
        u32 ptr = ntohs(th->urg_ptr);
 
-       if (ptr && !sysctl_tcp_stdurg)
+       if (ptr && !sock_net(sk)->ipv4.sysctl_tcp_stdurg)
                ptr--;
        ptr += ntohl(th->seq);