netdev - [PATCH v1 net 4/4] Revert "bridge: Add extack warning when enabling STP in netns."

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Date: Fri, 14 Jul 2023 19:13:38 -0700
From: Kuniyuki Iwashima <kuniyu@...zon.com>
To: "David S. Miller" <davem@...emloft.net>, Eric Dumazet
	<edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni
	<pabeni@...hat.com>, Roopa Prabhu <roopa@...dia.com>, Nikolay Aleksandrov
	<razor@...ckwall.org>
CC: "Eric W. Biederman" <ebiederm@...ssion.com>, Harry Coin
	<hcoin@...etfountain.com>, Kuniyuki Iwashima <kuniyu@...zon.com>, "Kuniyuki
 Iwashima" <kuni1840@...il.com>, <netdev@...r.kernel.org>
Subject: [PATCH v1 net 4/4] Revert "bridge: Add extack warning when enabling STP in netns."

This reverts commit 56a16035bb6effb37177867cea94c13a8382f745.

Since the previous commit, STP works on bridge in netns.

  # unshare -n
  # ip link add br0 type bridge
  # ip link add veth0 type veth peer name veth1

  # ip link set veth0 master br0 up
  [   50.558135] br0: port 1(veth0) entered blocking state
  [   50.558366] br0: port 1(veth0) entered disabled state
  [   50.558798] veth0: entered allmulticast mode
  [   50.564401] veth0: entered promiscuous mode

  # ip link set veth1 master br0 up
  [   54.215487] br0: port 2(veth1) entered blocking state
  [   54.215657] br0: port 2(veth1) entered disabled state
  [   54.215848] veth1: entered allmulticast mode
  [   54.219577] veth1: entered promiscuous mode

  # ip link set br0 type bridge stp_state 1
  # ip link set br0 up
  [   61.960726] br0: port 2(veth1) entered blocking state
  [   61.961097] br0: port 2(veth1) entered listening state
  [   61.961495] br0: port 1(veth0) entered blocking state
  [   61.961653] br0: port 1(veth0) entered listening state
  [   63.998835] br0: port 2(veth1) entered blocking state
  [   77.437113] br0: port 1(veth0) entered learning state
  [   86.653501] br0: received packet on veth0 with own address as source address (addr:6e:0f:e7:6f:5f:5f, vlan:0)
  [   92.797095] br0: port 1(veth0) entered forwarding state
  [   92.797398] br0: topology change detected, propagating

Let's remove the warning.

Signed-off-by: Kuniyuki Iwashima <kuniyu@...zon.com>
---
 net/bridge/br_stp_if.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/net/bridge/br_stp_if.c b/net/bridge/br_stp_if.c
index b65962682771..75204d36d7f9 100644
--- a/net/bridge/br_stp_if.c
+++ b/net/bridge/br_stp_if.c
@@ -201,9 +201,6 @@ int br_stp_set_enabled(struct net_bridge *br, unsigned long val,
 {
 	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");
-- 
2.30.2