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net: bridge: mst: Notify switchdev drivers of MST state changes

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Generate a switchdev notification whenever an MST state changes. This
notification is keyed by the VLANs MSTI rather than the VID, since
multiple VLANs may share the same MST instance.

Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Tobias Waldekranz 2022-03-16 16:08:48 +01:00 committed by Jakub Kicinski
parent 6284c723d9
commit 7ae9147f43
2 changed files with 25 additions and 0 deletions
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7
include/net/switchdev.h
View File

@ -19,6 +19,7 @@
enum switchdev_attr_id {
SWITCHDEV_ATTR_ID_UNDEFINED,
SWITCHDEV_ATTR_ID_PORT_STP_STATE,
SWITCHDEV_ATTR_ID_PORT_MST_STATE,
SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS,
SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS,
SWITCHDEV_ATTR_ID_PORT_MROUTER,
@ -32,6 +33,11 @@ enum switchdev_attr_id {
SWITCHDEV_ATTR_ID_VLAN_MSTI,
};
struct switchdev_mst_state {
u16 msti;
u8 state;
};
struct switchdev_brport_flags {
unsigned long val;
unsigned long mask;
@ -50,6 +56,7 @@ struct switchdev_attr {
void (*complete)(struct net_device *dev, int err, void *priv);
union {
u8 stp_state; /* PORT_STP_STATE */
struct switchdev_mst_state mst_state; /* PORT_MST_STATE */
struct switchdev_brport_flags brport_flags; /* PORT_BRIDGE_FLAGS */
bool mrouter; /* PORT_MROUTER */
clock_t ageing_time; /* BRIDGE_AGEING_TIME */

18
net/bridge/br_mst.c
View File

@ -30,13 +30,31 @@ static void br_mst_vlan_set_state(struct net_bridge_port *p, struct net_bridge_v
int br_mst_set_state(struct net_bridge_port *p, u16 msti, u8 state,
struct netlink_ext_ack *extack)
{
struct switchdev_attr attr = {
.id = SWITCHDEV_ATTR_ID_PORT_MST_STATE,
.orig_dev = p->dev,
.u.mst_state = {
.msti = msti,
.state = state,
},
};
struct net_bridge_vlan_group *vg;
struct net_bridge_vlan *v;
int err;
vg = nbp_vlan_group(p);
if (!vg)
return 0;
/* MSTI 0 (CST) state changes are notified via the regular
* SWITCHDEV_ATTR_ID_PORT_STP_STATE.
*/
if (msti) {
err = switchdev_port_attr_set(p->dev, &attr, extack);
if (err && err != -EOPNOTSUPP)
return err;
}
list_for_each_entry(v, &vg->vlan_list, vlist) {
if (v->brvlan->msti != msti)
continue;