Messages in this thread | | | Date | Wed, 18 Nov 2020 06:22:31 +0100 | From | Martin Schiller <> | Subject | Re: [PATCH net-next v3] net/tun: Call netdev notifiers |
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On 2020-11-18 01:32, Jakub Kicinski wrote: > On Mon, 16 Nov 2020 11:41:21 +0100 Martin Schiller wrote: >> Call netdev notifiers before and after changing the device type. >> >> Signed-off-by: Martin Schiller <ms@dev.tdt.de> >> --- >> >> Change from v2: >> use subject_prefix 'net-next' to fix 'fixes_present' issue >> >> 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 3d45d56172cb..2d9a00f41023 100644 >> --- a/drivers/net/tun.c >> +++ b/drivers/net/tun.c >> @@ -3071,9 +3071,13 @@ 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); > > This call may return an error (which has to be unpacked with > notifier_to_errno()).
OK, I'll fix that and send a v3 patch.
> >> 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;
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