On Thu, 21 Sep 2017 12:05:25 +0200 Vincent Bernat <vincent@xxxxxxxxx> wrote: > Currently, there is a difference in netlink events received when an > interface is modified through bridge ioctl() or through netlink. This > patch generates additional events when an interface is added to or > removed from a bridge via ioctl(). > > When adding then removing an interface from a bridge with netlink, we > get: > > 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue master bridge0 state UNKNOWN group default > link/ether 9e:da:60:ee:cf:c8 brd ff:ff:ff:ff:ff:ff > 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 master bridge0 state UNKNOWN > link/ether 9e:da:60:ee:cf:c8 > 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 master bridge0 state UNKNOWN > link/ether 9e:da:60:ee:cf:c8 > 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 master bridge0 state UNKNOWN > link/ether 9e:da:60:ee:cf:c8 > 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 master bridge0 state UNKNOWN > link/ether 9e:da:60:ee:cf:c8 > 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue master bridge0 state UNKNOWN group default > link/ether 9e:da:60:ee:cf:c8 brd ff:ff:ff:ff:ff:ff > > 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue master bridge0 state UNKNOWN group default > link/ether 9e:da:60:ee:cf:c8 brd ff:ff:ff:ff:ff:ff > 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 master bridge0 state UNKNOWN > link/ether 9e:da:60:ee:cf:c8 > Deleted 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 master bridge0 state UNKNOWN > link/ether 9e:da:60:ee:cf:c8 > 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default > link/ether 9e:da:60:ee:cf:c8 brd ff:ff:ff:ff:ff:ff > > When using ioctl(): > > 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue master bridge0 state UNKNOWN group default > link/ether 9e:da:60:ee:cf:c8 brd ff:ff:ff:ff:ff:ff > 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 master bridge0 state UNKNOWN > link/ether 9e:da:60:ee:cf:c8 > 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 master bridge0 state UNKNOWN > link/ether 9e:da:60:ee:cf:c8 > 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 master bridge0 state UNKNOWN > link/ether 9e:da:60:ee:cf:c8 > 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue master bridge0 state UNKNOWN group default > link/ether 9e:da:60:ee:cf:c8 brd ff:ff:ff:ff:ff:ff > > 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue master bridge0 state UNKNOWN group default > link/ether 9e:da:60:ee:cf:c8 brd ff:ff:ff:ff:ff:ff > 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 master bridge0 state UNKNOWN > link/ether 9e:da:60:ee:cf:c8 > Deleted 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 master bridge0 state UNKNOWN > link/ether 9e:da:60:ee:cf:c8 > 5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default > link/ether 9e:da:60:ee:cf:c8 brd ff:ff:ff:ff:ff:ff > > Without this patch, the last netlink notification is not sent. > > Signed-off-by: Vincent Bernat <vincent@xxxxxxxxx> This makes sense, you should probably add a Fixes: tag to help maintainers of long term stable kernels. Reviewed-by: Stephen Hemminger <stephen@xxxxxxxxxxxxxxxxxx>
