net/netlink: Add getsockopt support for NETLINK_LISTEN_ALL_NSID

Currently getsockopt does not support NETLINK_LISTEN_ALL_NSID,
and we are unable to get the value of NETLINK_LISTEN_ALL_NSID
socket option through getsockopt.

This patch adds getsockopt support for NETLINK_LISTEN_ALL_NSID.

Signed-off-by: Juntong Deng <juntong.deng@outlook.com>
Link: https://lore.kernel.org/r/AM6PR03MB58482322B7B335308DA56FE599272@AM6PR03MB5848.eurprd03.prod.outlook.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index da846212fb9b2816f1966d3ab59ce43f07b88c52..7554803218a25cd7a54aab503ca50deafb43c258 100644 (file)
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -1773,6 +1773,9 @@ static int netlink_getsockopt(struct socket *sock, int level, int optname,
                netlink_unlock_table();
                return err;
        }
+       case NETLINK_LISTEN_ALL_NSID:
+               flag = NETLINK_F_LISTEN_ALL_NSID;
+               break;
        case NETLINK_CAP_ACK:
                flag = NETLINK_F_CAP_ACK;
                break;