netdev - Re: [PATCHv3 net-next 5/6] bridge: a netlink notification should be sent when those attributes are changed by br_sysfs

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Message-ID: <5708F964.1090407@cumulusnetworks.com>
Date:	Sat, 9 Apr 2016 14:45:24 +0200
From:	Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
To:	Xin Long <lucien.xin@...il.com>,
	network dev <netdev@...r.kernel.org>,
	bridge@...ts.linux-foundation.org
Cc:	davem@...emloft.net, Stephen Hemminger <stephen@...workplumber.org>
Subject: Re: [PATCHv3 net-next 5/6] bridge: a netlink notification should be
 sent when those attributes are changed by br_sysfs_if

On 04/08/2016 06:03 PM, Xin Long wrote:
> Now when we change the attributes of bridge or br_port by netlink,
> a relevant netlink notification will be sent, but if we change them
> by ioctl or sysfs, no notification will be sent.
> 
> We should ensure that whenever those attributes change internally or from
> sysfs/ioctl, that a netlink notification is sent out to listeners.
> 
> Also, NetworkManager will use this in the future to listen for out-of-band
> bridge master attribute updates and incorporate them into the runtime
> configuration.
> 
> This patch is used for br_sysfs_if, and we also move br_ifinfo_notify out
> of store_flag.
> 
> Signed-off-by: Xin Long <lucien.xin@...il.com>
> ---
>  net/bridge/br_sysfs_if.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 

Note: there's a slight behaviour change, before if the flags were the same
a notification wouldn't be sent, now it would. Anyway I don't see a problem
as this is true for other attributes which are set to the same value.

Reviewed-by: Nikolay Aleksandrov <nikolay@...ulusnetworks.com>