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Date: Mon, 14 Mar 2022 10:52:28 +0100
From: Tobias Waldekranz <tobias@...dekranz.com>
To: davem@...emloft.net, kuba@...nel.org
Cc: Andrew Lunn <andrew@...n.ch>,
Vivien Didelot <vivien.didelot@...il.com>,
Florian Fainelli <f.fainelli@...il.com>,
Vladimir Oltean <olteanv@...il.com>,
Jiri Pirko <jiri@...nulli.us>,
Ivan Vecera <ivecera@...hat.com>,
Roopa Prabhu <roopa@...dia.com>,
Nikolay Aleksandrov <razor@...ckwall.org>,
Russell King <linux@...linux.org.uk>,
Ido Schimmel <idosch@...dia.com>,
Petr Machata <petrm@...dia.com>,
Cooper Lees <me@...perlees.com>,
Matt Johnston <matt@...econstruct.com.au>,
linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
bridge@...ts.linux-foundation.org
Subject: [PATCH v3 net-next 11/14] net: dsa: Handle MST state changes
Add the usual trampoline functionality from the generic DSA layer down
to the drivers for MST state changes.
When a state changes to disabled/blocking/listening, make sure to fast
age any dynamic entries in the affected VLANs (those controlled by the
MSTI in question).
Signed-off-by: Tobias Waldekranz <tobias@...dekranz.com>
---
include/net/dsa.h | 3 +++
net/dsa/dsa_priv.h | 2 ++
net/dsa/port.c | 67 +++++++++++++++++++++++++++++++++++++++++++---
net/dsa/slave.c | 6 +++++
4 files changed, 74 insertions(+), 4 deletions(-)
diff --git a/include/net/dsa.h b/include/net/dsa.h
index 1ddaa2cc5842..a171e7cdb3fe 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -945,7 +945,10 @@ struct dsa_switch_ops {
struct dsa_bridge bridge);
void (*port_stp_state_set)(struct dsa_switch *ds, int port,
u8 state);
+ int (*port_mst_state_set)(struct dsa_switch *ds, int port,
+ const struct switchdev_mst_state *state);
void (*port_fast_age)(struct dsa_switch *ds, int port);
+ void (*port_vlan_fast_age)(struct dsa_switch *ds, int port, u16 vid);
int (*port_pre_bridge_flags)(struct dsa_switch *ds, int port,
struct switchdev_brport_flags flags,
struct netlink_ext_ack *extack);
diff --git a/net/dsa/dsa_priv.h b/net/dsa/dsa_priv.h
index d90b4cf0c9d2..2ae8996cf7c8 100644
--- a/net/dsa/dsa_priv.h
+++ b/net/dsa/dsa_priv.h
@@ -215,6 +215,8 @@ static inline struct net_device *dsa_master_find_slave(struct net_device *dev,
void dsa_port_set_tag_protocol(struct dsa_port *cpu_dp,
const struct dsa_device_ops *tag_ops);
int dsa_port_set_state(struct dsa_port *dp, u8 state, bool do_fast_age);
+int dsa_port_set_mst_state(struct dsa_port *dp,
+ const struct switchdev_mst_state *state);
int dsa_port_enable_rt(struct dsa_port *dp, struct phy_device *phy);
int dsa_port_enable(struct dsa_port *dp, struct phy_device *phy);
void dsa_port_disable_rt(struct dsa_port *dp);
diff --git a/net/dsa/port.c b/net/dsa/port.c
index f6a822d854cc..223681e03321 100644
--- a/net/dsa/port.c
+++ b/net/dsa/port.c
@@ -30,12 +30,11 @@ static int dsa_port_notify(const struct dsa_port *dp, unsigned long e, void *v)
return dsa_tree_notify(dp->ds->dst, e, v);
}
-static void dsa_port_notify_bridge_fdb_flush(const struct dsa_port *dp)
+static void dsa_port_notify_bridge_fdb_flush(const struct dsa_port *dp, u16 vid)
{
struct net_device *brport_dev = dsa_port_to_bridge_port(dp);
struct switchdev_notifier_fdb_info info = {
- /* flush all VLANs */
- .vid = 0,
+ .vid = vid,
};
/* When the port becomes standalone it has already left the bridge.
@@ -57,7 +56,39 @@ static void dsa_port_fast_age(const struct dsa_port *dp)
ds->ops->port_fast_age(ds, dp->index);
- dsa_port_notify_bridge_fdb_flush(dp);
+ dsa_port_notify_bridge_fdb_flush(dp, 0);
+}
+
+static void dsa_port_vlan_fast_age(const struct dsa_port *dp, u16 vid)
+{
+ struct dsa_switch *ds = dp->ds;
+
+ if (!ds->ops->port_vlan_fast_age)
+ return;
+
+ ds->ops->port_vlan_fast_age(ds, dp->index, vid);
+
+ dsa_port_notify_bridge_fdb_flush(dp, vid);
+}
+
+static void dsa_port_msti_fast_age(const struct dsa_port *dp, u16 msti)
+{
+ unsigned long *vids;
+ int vid;
+
+ vids = bitmap_zalloc(VLAN_N_VID, 0);
+ if (!vids)
+ return;
+
+ if (br_mst_get_info(dsa_port_bridge_dev_get(dp), msti, vids))
+ goto out_free;
+
+ for_each_set_bit(vid, vids, VLAN_N_VID) {
+ dsa_port_vlan_fast_age(dp, vid);
+ }
+
+out_free:
+ kfree(vids);
}
static bool dsa_port_can_configure_learning(struct dsa_port *dp)
@@ -118,6 +149,32 @@ static void dsa_port_set_state_now(struct dsa_port *dp, u8 state,
pr_err("DSA: failed to set STP state %u (%d)\n", state, err);
}
+int dsa_port_set_mst_state(struct dsa_port *dp,
+ const struct switchdev_mst_state *state)
+{
+ struct dsa_switch *ds = dp->ds;
+ int err;
+
+ if (!ds->ops->port_mst_state_set)
+ return -EOPNOTSUPP;
+
+ err = ds->ops->port_mst_state_set(ds, dp->index, state);
+ if (err)
+ return err;
+
+ if (dp->learning) {
+ switch (state->state) {
+ case BR_STATE_DISABLED:
+ case BR_STATE_BLOCKING:
+ case BR_STATE_LISTENING:
+ dsa_port_msti_fast_age(dp, state->msti);
+ break;
+ }
+ }
+
+ return 0;
+}
+
int dsa_port_enable_rt(struct dsa_port *dp, struct phy_device *phy)
{
struct dsa_switch *ds = dp->ds;
@@ -748,6 +805,8 @@ int dsa_port_mst_enable(struct dsa_port *dp, bool on,
return 0;
if (!(ds->ops->vlan_msti_set &&
+ ds->ops->port_mst_state_set &&
+ ds->ops->port_vlan_fast_age &&
dsa_port_can_configure_learning(dp))) {
NL_SET_ERR_MSG_MOD(extack, "Hardware does not support MST");
return -EINVAL;
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index cd2c57de9592..106b177ad1eb 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -450,6 +450,12 @@ static int dsa_slave_port_attr_set(struct net_device *dev, const void *ctx,
ret = dsa_port_set_state(dp, attr->u.stp_state, true);
break;
+ case SWITCHDEV_ATTR_ID_PORT_MST_STATE:
+ if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
+ return -EOPNOTSUPP;
+
+ ret = dsa_port_set_mst_state(dp, &attr->u.mst_state);
+ break;
case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev))
return -EOPNOTSUPP;
--
2.25.1
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