[Bridge] [PATCHv3 net-next 4/6] bridge: a netlink notification should be sent when those attributes are changed by br_sysfs_br

[Nikolay Aleksandrov]

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_br. and we also need to remove some
> rtnl_trylock in old functions so that we can call it in a common one.
> 
> For group_addr_store, we cannot make it use store_bridge_parm, because
> it's not a string-to-long convert, we will add notification on it
> individually.
> 
> Signed-off-by: Xin Long <lucien.xin at gmail.com>
> ---
>  net/bridge/br_sysfs_br.c | 21 +++++++++------------
>  net/bridge/br_vlan.c     | 30 +++++-------------------------
>  2 files changed, 14 insertions(+), 37 deletions(-)
> 

Signed-off-by: Nikolay Aleksandrov <nikolay at cumulusnetworks.com>