From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/net/bridge/br_stp_if.c | 23 ++++++++++++++++-------
1 files changed, 16 insertions(+), 7 deletions(-)
diff --git a/kernel/net/bridge/br_stp_if.c b/kernel/net/bridge/br_stp_if.c
index 808e2b9..3326dfc 100644
--- a/kernel/net/bridge/br_stp_if.c
+++ b/kernel/net/bridge/br_stp_if.c
@@ -1,14 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Spanning tree protocol; interface code
* Linux ethernet bridge
*
* Authors:
* Lennert Buytenhek <buytenh@gnu.org>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
*/
#include <linux/kernel.h>
@@ -117,7 +113,8 @@
del_timer(&p->forward_delay_timer);
del_timer(&p->hold_timer);
- br_fdb_delete_by_port(br, p, 0, 0);
+ if (!rcu_access_pointer(p->backup_port))
+ br_fdb_delete_by_port(br, p, 0, 0);
br_multicast_disable_port(p);
br_configuration_update(br);
@@ -199,9 +196,19 @@
br->stp_enabled = BR_NO_STP;
}
-void br_stp_set_enabled(struct net_bridge *br, unsigned long val)
+int br_stp_set_enabled(struct net_bridge *br, unsigned long val,
+ struct netlink_ext_ack *extack)
{
ASSERT_RTNL();
+
+ if (!net_eq(dev_net(br->dev), &init_net))
+ NL_SET_ERR_MSG_MOD(extack, "STP does not work in non-root netns");
+
+ if (br_mrp_enabled(br)) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "STP can't be enabled if MRP is already enabled");
+ return -EINVAL;
+ }
if (val) {
if (br->stp_enabled == BR_NO_STP)
@@ -210,6 +217,8 @@
if (br->stp_enabled != BR_NO_STP)
br_stp_stop(br);
}
+
+ return 0;
}
/* called under bridge lock */
--
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