linux-kernel - [PATCH net v2] net/tun: Call netdev notifiers

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Message-ID: <20201116092751.6905-1-ms@dev.tdt.de>
Date:   Mon, 16 Nov 2020 10:27:51 +0100
From:   Martin Schiller <ms@....tdt.de>
To:     davem@...emloft.net, kuba@...nel.org
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Martin Schiller <ms@....tdt.de>
Subject: [PATCH net v2] net/tun: Call netdev notifiers

Call netdev notifiers before and after changing the device type.

Signed-off-by: Martin Schiller <ms@....tdt.de>
---

Change from v1:
fix 'subject_prefix' and 'checkpatch' warnings

---
 drivers/net/tun.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index be69d272052f..f3b337d45ad0 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -3124,9 +3124,13 @@ static long __tun_chr_ioctl(struct file *file, unsigned int cmd,
 				   "Linktype set failed because interface is up\n");
 			ret = -EBUSY;
 		} else {
+			call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE,
+						 tun->dev);
 			tun->dev->type = (int) arg;
 			netif_info(tun, drv, tun->dev, "linktype set to %d\n",
 				   tun->dev->type);
+			call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE,
+						 tun->dev);
 			ret = 0;
 		}
 		break;
-- 
2.20.1