diff mbox series

[net-next,v4] net/tun: Call netdev notifiers

Message ID 20201118054555.14248-1-ms@dev.tdt.de (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series [net-next,v4] net/tun: Call netdev notifiers | expand

Checks

Context Check Description
netdev/cover_letter success Link
netdev/fixes_present success Link
netdev/patch_count success Link
netdev/tree_selection success Clearly marked for net-next
netdev/subject_prefix success Link
netdev/source_inline success Was 0 now: 0
netdev/verify_signedoff success Link
netdev/module_param success Was 0 now: 0
netdev/build_32bit fail Errors and warnings before: 0 this patch: 5
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/verify_fixes success Link
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 20 lines checked
netdev/build_allmodconfig_warn fail Errors and warnings before: 0 this patch: 5
netdev/header_inline success Link
netdev/stable success Stable not CCed

Commit Message

Martin Schiller Nov. 18, 2020, 5:45 a.m. UTC
Call netdev notifiers before and after changing the device type.

Signed-off-by: Martin Schiller <ms@dev.tdt.de>
---
Changes to v3:
* Handle return value of call_netdevice_notifiers()

Changes to v2:
* Use subject_prefix 'net-next' to fix 'fixes_present' issue

Changes to v1:
* Fix 'subject_prefix' and 'checkpatch' warnings

---
 drivers/net/tun.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 3d45d56172cb..704306695b88 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -3071,10 +3071,19 @@  static long __tun_chr_ioctl(struct file *file, unsigned int cmd,
 				   "Linktype set failed because interface is up\n");
 			ret = -EBUSY;
 		} else {
+			ret = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE,
+						       tun->dev);
+			ret = notifier_to_errno(err);
+			if (ret) {
+				netif_info(tun, drv, tun->dev,
+					   "Refused to change device type\n");
+				break;
+			}
 			tun->dev->type = (int) arg;
 			netif_info(tun, drv, tun->dev, "linktype set to %d\n",
 				   tun->dev->type);
-			ret = 0;
+			call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE,
+						 tun->dev);
 		}
 		break;