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net: bridge: switchdev: differentiate new VLANs from changed ones

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br_switchdev_port_vlan_add() currently emits a SWITCHDEV_PORT_OBJ_ADD
event with a SWITCHDEV_OBJ_ID_PORT_VLAN for 2 distinct cases:

- a struct net_bridge_vlan got created
- an existing struct net_bridge_vlan was modified

This makes it impossible for switchdev drivers to properly balance
PORT_OBJ_ADD with PORT_OBJ_DEL events, so if we want to allow that to
happen, we must provide a way for drivers to distinguish between a
VLAN with changed flags and a new one.

Annotate struct switchdev_obj_port_vlan with a "bool changed" that
distinguishes the 2 cases above.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vladimir Oltean 2022-02-15 19:02:12 +02:00 • committed by David S. Miller
parent 27c5f74c7b
commit 8d23a54f5b
4 changed files with 17 additions and 9 deletions
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7
include/net/switchdev.h
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@ -81,6 +81,13 @@ struct switchdev_obj_port_vlan {
struct switchdev_obj obj;
u16 flags;
u16 vid;
/* If set, the notifier signifies a change of one of the following
* flags for a VLAN that already exists:
* - BRIDGE_VLAN_INFO_PVID
* - BRIDGE_VLAN_INFO_UNTAGGED
* Entries with BRIDGE_VLAN_INFO_BRENTRY unset are not notified at all.
*/
bool changed;
};
#define SWITCHDEV_OBJ_PORT_VLAN(OBJ) \