On 10/08/2022 17:42, Sevinj Aghayeva wrote: > > > On Wed, Aug 10, 2022 at 4:54 AM Nikolay Aleksandrov <razor@xxxxxxxxxxxxx <mailto:razor@xxxxxxxxxxxxx>> wrote: > > On 10/08/2022 06:11, Sevinj Aghayeva wrote: > > When bridge binding is enabled for a vlan interface, it is expected > > that the link state of the vlan interface will track the subset of the > > ports that are also members of the corresponding vlan, rather than > > that of all ports. > > > > Currently, this feature works as expected when a vlan interface is > > created with bridge binding enabled: > > > > ip link add link br name vlan10 type vlan id 10 protocol 802.1q \ > > bridge_binding on > > > > However, the feature does not work when a vlan interface is created > > with bridge binding disabled, and then enabled later: > > > > ip link add link br name vlan10 type vlan id 10 protocol 802.1q \ > > bridge_binding off > > ip link set vlan10 type vlan bridge_binding on > > > > After these two commands, the link state of the vlan interface > > continues to track that of all ports, which is inconsistent and > > confusing to users. This series fixes this bug and introduces two > > tests for the valid behavior. > > > > Sevinj Aghayeva (3): > > net: core: export call_netdevice_notifiers_info > > net: 8021q: fix bridge binding behavior for vlan interfaces > > selftests: net: tests for bridge binding behavior > > > > include/linux/netdevice.h | 2 + > > net/8021q/vlan.h | 2 +- > > net/8021q/vlan_dev.c | 25 ++- > > net/core/dev.c | 7 +- > > tools/testing/selftests/net/Makefile | 1 + > > .../selftests/net/bridge_vlan_binding_test.sh | 143 ++++++++++++++++++ > > 6 files changed, 172 insertions(+), 8 deletions(-) > > create mode 100755 tools/testing/selftests/net/bridge_vlan_binding_test.sh > > > > Hi, > NETDEV_CHANGE event is already propagated when the vlan changes flags, > > > I'm not sure if NETDEV_CHANGE is actually propagated when the vlan changes flags. The two functions in the bridge module that handle NETDEV_CHANGE are br_vlan_port_event and br_vlan_bridge_event. I've installed probes for both, and when I'm changing flags using "sudo ip link set vlan10 type vlan bridge_binding on", I don't see any of those functions getting called, although I do see vlan_dev_change_flags getting called. I think there may be a bug in core/dev.c:__dev_notify_flags. are both vlan and bridge interfaces up? what exactly are you probing for? I can see the NETDEV_CHANGE event go through when changing the loose binding.
