sctp: add sysctl net.sctp.l3mdev_accept

This patch is to add sysctl net.sctp.l3mdev_accept to allow
users to change the pernet global l3mdev_accept.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/Documentation/networking/ip-sysctl.rst b/Documentation/networking/ip-sysctl.rst
index 727b25c..7fbd060 100644 (file)
--- a/Documentation/networking/ip-sysctl.rst
+++ b/Documentation/networking/ip-sysctl.rst
@@ -3127,6 +3127,15 @@ ecn_enable - BOOLEAN
 
         Default: 1
 
+l3mdev_accept - BOOLEAN
+       Enabling this option allows a "global" bound socket to work
+       across L3 master domains (e.g., VRFs) with packets capable of
+       being received regardless of the L3 domain in which they
+       originated. Only valid when the kernel was compiled with
+       CONFIG_NET_L3_MASTER_DEV.
+
+       Default: 1 (enabled)
+
 
 ``/proc/sys/net/core/*``
 ========================

diff --git a/net/sctp/sysctl.c b/net/sctp/sysctl.c
index b46a416..7f40ed1 100644 (file)
--- a/net/sctp/sysctl.c
+++ b/net/sctp/sysctl.c
@@ -347,6 +347,17 @@ static struct ctl_table sctp_net_table[] = {
                .extra1         = &max_autoclose_min,
                .extra2         = &max_autoclose_max,
        },
+#ifdef CONFIG_NET_L3_MASTER_DEV
+       {
+               .procname       = "l3mdev_accept",
+               .data           = &init_net.sctp.l3mdev_accept,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = proc_dointvec_minmax,
+               .extra1         = SYSCTL_ZERO,
+               .extra2         = SYSCTL_ONE,
+       },
+#endif
        {
                .procname       = "pf_enable",
                .data           = &init_net.sctp.pf_enable,