netdev - RE: [PATCH net-next] net: print a notification on device rename

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Date:	Sun, 20 Jul 2014 12:37:52 +0000
From:	Yuval Mintz <Yuval.Mintz@...gic.com>
To:	Veaceslav Falico <vfalico@...il.com>,
	netdev <netdev@...r.kernel.org>
CC:	David Miller <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Vlad Yasevich <vyasevic@...hat.com>,
	stephen hemminger <stephen@...workplumber.org>,
	Jerry Chu <hkchu@...gle.com>,
	Ben Hutchings <bhutchings@...arflare.com>,
	David Laight <David.Laight@...LAB.COM>
Subject: RE: [PATCH net-next] net: print a notification on device rename

> Currently it's done silently (from the kernel part), and thus it might be hard to
> track the renames from logs.
>
> Add a simple netdev_info() to notify the rename, but only in case the previous
> name was valid.

Hi,

Why you're at it, perhaps we could also consider adding an optional ndo callback
in the drivers to notify them of the device name change?
[e.g., multi-module dependencies where one would wish to inform the others
of the name change]

Cheers,
Yuval

>
> CC: "David S. Miller" <davem@...emloft.net>
> CC: Eric Dumazet <edumazet@...gle.com>
> CC: Vlad Yasevich <vyasevic@...hat.com>
> CC: stephen hemminger <stephen@...workplumber.org>
> CC: Jerry Chu <hkchu@...gle.com>
> CC: Ben Hutchings <bhutchings@...arflare.com>
> CC: David Laight <David.Laight@...LAB.COM>
> Signed-off-by: Veaceslav Falico <vfalico@...il.com>
> ---
>  net/core/dev.c | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/net/core/dev.c b/net/core/dev.c index 239722a..d14ebf0 100644
> --- a/net/core/dev.c
> +++ b/net/core/dev.c
> @@ -1113,6 +1113,9 @@ int dev_change_name(struct net_device *dev, const
> char *newname)
>               return err;
>       }
>
> +     if (oldname[0] && !strchr(oldname, '%'))
> +             netdev_info(dev, "renamed from %s\n", oldname);
> +
>       old_assign_type = dev->name_assign_type;
>       dev->name_assign_type = NET_NAME_RENAMED;
>

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