1 files changed, 15 insertions, 4 deletions

diff --git a/net/smc/smc_sysctl.c b/net/smc/smc_sysctl.c
index a5946d1b9d60..2fab6456f765 100644
--- a/net/smc/smc_sysctl.c
+++ b/net/smc/smc_sysctl.c
@@ -90,11 +90,20 @@ static struct ctl_table smc_table[] = {
 		.extra1		= &conns_per_lgr_min,
 		.extra2		= &conns_per_lgr_max,
 	},
-	{  }
+	{
+		.procname	= "limit_smc_hs",
+		.data		= &init_net.smc.limit_smc_hs,
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec_minmax,
+		.extra1		= SYSCTL_ZERO,
+		.extra2		= SYSCTL_ONE,
+	},
 };
 
 int __net_init smc_sysctl_net_init(struct net *net)
 {
+	size_t table_size = ARRAY_SIZE(smc_table);
 	struct ctl_table *table;
 
 	table = smc_table;
@@ -105,12 +114,12 @@ int __net_init smc_sysctl_net_init(struct net *net)
 		if (!table)
 			goto err_alloc;
 
-		for (i = 0; i < ARRAY_SIZE(smc_table) - 1; i++)
+		for (i = 0; i < table_size; i++)
 			table[i].data += (void *)net - (void *)&init_net;
 	}
 
 	net->smc.smc_hdr = register_net_sysctl_sz(net, "net/smc", table,
-						  ARRAY_SIZE(smc_table));
+						  table_size);
 	if (!net->smc.smc_hdr)
 		goto err_reg;
 
@@ -121,6 +130,8 @@ int __net_init smc_sysctl_net_init(struct net *net)
 	WRITE_ONCE(net->smc.sysctl_rmem, net_smc_rmem_init);
 	net->smc.sysctl_max_links_per_lgr = SMC_LINKS_PER_LGR_MAX_PREFER;
 	net->smc.sysctl_max_conns_per_lgr = SMC_CONN_PER_LGR_PREFER;
+	/* disable handshake limitation by default */
+	net->smc.limit_smc_hs = 0;
 
 	return 0;
 
@@ -133,7 +144,7 @@ err_alloc:
 
 void __net_exit smc_sysctl_net_exit(struct net *net)
 {
-	struct ctl_table *table;
+	const struct ctl_table *table;
 
 	table = net->smc.smc_hdr->ctl_table_arg;
 	unregister_net_sysctl_table(net->smc.smc_hdr);