netdev - [PATCH net-next v2] bonding: Added -ENODEV interpret for slaves option

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Date:   Sun, 14 Mar 2021 22:56:29 +0800
From:   Jianlin Lv <Jianlin.Lv@....com>
To:     j.vosburgh@...il.com, vfalico@...il.com, andy@...yhouse.net,
        davem@...emloft.net, kuba@...nel.org
Cc:     Jianlin.Lv@....com, iecedge@...il.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH net-next v2] bonding: Added -ENODEV interpret for slaves option

When the incorrect interface name is stored in the slaves/active_slave
option of the bonding sysfs, the kernel does not record the log that
interface does not exist.

This patch adds a log for -ENODEV error, which will facilitate users to
figure out such issue.

Signed-off-by: Jianlin Lv <Jianlin.Lv@....com>
---
v2: Update changlog.
---
 drivers/net/bonding/bond_options.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/net/bonding/bond_options.c b/drivers/net/bonding/bond_options.c
index 77d7c38bd435..c9d3604ae129 100644
--- a/drivers/net/bonding/bond_options.c
+++ b/drivers/net/bonding/bond_options.c
@@ -640,6 +640,15 @@ static void bond_opt_error_interpret(struct bonding *bond,
 		netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
 			   opt->name);
 		break;
+	case -ENODEV:
+		if (val && val->string) {
+			p = strchr(val->string, '\n');
+			if (p)
+				*p = '\0';
+			netdev_err(bond->dev, "option %s: interface %s does not exist!\n",
+				   opt->name, val->string);
+		}
+		break;
 	default:
 		break;
 	}
-- 
2.25.1