netdev - Re: [PATCH V6 net-next 2/2] bonding: Prevent duplicate userspace notification

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Date:   Sat, 27 May 2017 15:41:57 -0600
From:   David Ahern <dsahern@...il.com>
To:     Vladislav Yasevich <vyasevich@...il.com>, netdev@...r.kernel.org
Cc:     roopa@...ulusnetworks.com, jiri@...nulli.us, vfalico@...il.com,
        andy@...yhouse.net, Vladislav Yasevich <vyasevic@...hat.com>,
        David Ahern <dsa@...ulusnetworks.com>
Subject: Re: [PATCH V6 net-next 2/2] bonding: Prevent duplicate userspace
 notification

On 5/27/17 8:14 AM, Vladislav Yasevich wrote:
> Whenever a user changes bonding options, a NETDEV_CHANGEINFODATA
> notificatin is generated which results in a rtnelink message to
> be sent.  While runnig 'ip monitor', we can actually see 2 messages,
> one a result of the event, and the other a result of state change
> that is generated bo netdev_state_change().  However, this is not
> always the case. If bonding changes were done via sysfs or ifenslave
> (old ioctl interface), then only 1 message is seen.
> 
> This patch removes duplicate messages in the case of using netlink
> to configure bonding.  It introduceds a separte function that
> triggers a netdev event and uses that function in the syfs and ioctl
> cases.
> 
> This was discovered while auditing all the different envents and
> continues the effort of cleaning up duplicated netlink messages.
> 
> CC: David Ahern <dsa@...ulusnetworks.com>
> CC: Jiri Pirko <jiri@...nulli.us>
> Signed-off-by: Vladislav Yasevich <vyasevic@...hat.com>
> ---
>  drivers/net/bonding/bond_main.c    |  3 ++-
>  drivers/net/bonding/bond_options.c | 27 +++++++++++++++++++++++++--
>  include/net/bond_options.h         |  2 ++
>  3 files changed, 29 insertions(+), 3 deletions(-)
> 

Acked-by: David Ahern <dsahern@...il.com>