[PATCH net-next] bareudp: Add extack support to bareudp_configure()

[PATCH net-next] bareudp: Add extack support to bareudp_configure()

[Guillaume Nault]

Add missing extacks for common configuration errors.

Signed-off-by: Guillaume Nault <gnault@redhat.com>
---
 drivers/net/bareudp.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/net/bareudp.c b/drivers/net/bareudp.c
index f80330361399..ba587e5fc24f 100644
--- a/drivers/net/bareudp.c
+++ b/drivers/net/bareudp.c
@@ -609,7 +609,8 @@ static struct bareudp_dev *bareudp_find_dev(struct bareudp_net *bn,
 }
 
 static int bareudp_configure(struct net *net, struct net_device *dev,
-			     struct bareudp_conf *conf)
+			     struct bareudp_conf *conf,
+			     struct netlink_ext_ack *extack)
 {
 	struct bareudp_net *bn = net_generic(net, bareudp_net_id);
 	struct bareudp_dev *t, *bareudp = netdev_priv(dev);
@@ -618,13 +619,17 @@ static int bareudp_configure(struct net *net, struct net_device *dev,
 	bareudp->net = net;
 	bareudp->dev = dev;
 	t = bareudp_find_dev(bn, conf);
-	if (t)
+	if (t) {
+		NL_SET_ERR_MSG(extack, "Another bareudp device using the same port already exists");
 		return -EBUSY;
+	}
 
 	if (conf->multi_proto_mode &&
 	    (conf->ethertype != htons(ETH_P_MPLS_UC) &&
-	     conf->ethertype != htons(ETH_P_IP)))
+	     conf->ethertype != htons(ETH_P_IP))) {
+		NL_SET_ERR_MSG(extack, "Cannot set multiproto mode for this ethertype (only IPv4 and unicast MPLS are supported)");
 		return -EINVAL;
+	}
 
 	bareudp->port = conf->port;
 	bareudp->ethertype = conf->ethertype;
@@ -671,7 +676,7 @@ static int bareudp_newlink(struct net *net, struct net_device *dev,
 	if (err)
 		return err;
 
-	err = bareudp_configure(net, dev, &conf);
+	err = bareudp_configure(net, dev, &conf, extack);
 	if (err)
 		return err;
 
-- 
2.21.3

Re: [PATCH net-next] bareudp: Add extack support to bareudp_configure()

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net-next.git (master)
by David S. Miller <davem@davemloft.net>:

On Mon, 13 Dec 2021 19:17:17 +0100 you wrote:
> Add missing extacks for common configuration errors.
> 
> Signed-off-by: Guillaume Nault <gnault@redhat.com>
> ---
>  drivers/net/bareudp.c | 13 +++++++++----
>  1 file changed, 9 insertions(+), 4 deletions(-)

Here is the summary with links:
  - [net-next] bareudp: Add extack support to bareudp_configure()
    https://git.kernel.org/netdev/net-next/c/b4bffa4ceab1

You are awesome, thank you!
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