netdev - [PATCH net-next 2/2] net: bridge: add warning comments to avoid extending sysfs

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Date:   Fri, 29 Jan 2021 13:51:42 +0200
From:   Nikolay Aleksandrov <razor@...ckwall.org>
To:     netdev@...r.kernel.org
Cc:     roopa@...dia.com, bridge@...ts.linux-foundation.org,
        kuba@...nel.org, davem@...emloft.net,
        Nikolay Aleksandrov <nikolay@...dia.com>
Subject: [PATCH net-next 2/2] net: bridge: add warning comments to avoid extending sysfs

From: Nikolay Aleksandrov <nikolay@...dia.com>

We're moving to netlink-only options, so add comments in the bridge's
sysfs files to warn against adding any new sysfs entries.

Signed-off-by: Nikolay Aleksandrov <nikolay@...dia.com>
---
 net/bridge/br_sysfs_br.c | 4 ++++
 net/bridge/br_sysfs_if.c | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/net/bridge/br_sysfs_br.c b/net/bridge/br_sysfs_br.c
index 7db06e3f642a..71f0f671c4ef 100644
--- a/net/bridge/br_sysfs_br.c
+++ b/net/bridge/br_sysfs_br.c
@@ -19,6 +19,10 @@
 
 #include "br_private.h"
 
+/* IMPORTANT: new bridge options must be added with netlink support only
+ *            please do not add new sysfs entries
+ */
+
 #define to_bridge(cd)	((struct net_bridge *)netdev_priv(to_net_dev(cd)))
 
 /*
diff --git a/net/bridge/br_sysfs_if.c b/net/bridge/br_sysfs_if.c
index 7a59cdddd3ce..96ff63cde1be 100644
--- a/net/bridge/br_sysfs_if.c
+++ b/net/bridge/br_sysfs_if.c
@@ -17,6 +17,10 @@
 
 #include "br_private.h"
 
+/* IMPORTANT: new bridge port options must be added with netlink support only
+ *            please do not add new sysfs entries
+ */
+
 struct brport_attribute {
 	struct attribute	attr;
 	ssize_t (*show)(struct net_bridge_port *, char *);
-- 
2.29.2