[PATCH v2 net-next 0/3] Small ocelot VLAN improvements

[PATCH v2 net-next 0/3] Small ocelot VLAN improvements

[Vladimir Oltean]

This small series propagates some VLAN restrictions via netlink extack
and creates some helper functions instead of open-coding VLAN table
manipulations from multiple places.

This is split from the larger "DSA FDB isolation" series, hence the v2
tag:
https://patchwork.kernel.org/project/netdevbpf/cover/20210818120150.892647-1-vladimir.oltean@nxp.com/

Vladimir Oltean (3):
  net: mscc: ocelot: transmit the "native VLAN" error via extack
  net: mscc: ocelot: transmit the VLAN filtering restrictions via extack
  net: mscc: ocelot: use helpers for port VLAN membership

 drivers/net/dsa/ocelot/felix.c         | 10 ++--
 drivers/net/ethernet/mscc/ocelot.c     | 73 ++++++++++++++++----------
 drivers/net/ethernet/mscc/ocelot_net.c | 38 ++++++++------
 include/soc/mscc/ocelot.h              |  5 +-
 4 files changed, 76 insertions(+), 50 deletions(-)

-- 
2.25.1

[PATCH v2 net-next 1/3] net: mscc: ocelot: transmit the "native VLAN" error via extack

[Vladimir Oltean]

We need to reject some more configurations in future patches, convert
the existing one to netlink extack.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
 drivers/net/dsa/ocelot/felix.c         |  8 ++++---
 drivers/net/ethernet/mscc/ocelot.c     |  7 +++---
 drivers/net/ethernet/mscc/ocelot_net.c | 30 ++++++++++++++------------
 include/soc/mscc/ocelot.h              |  2 +-
 4 files changed, 25 insertions(+), 22 deletions(-)

diff --git a/drivers/net/dsa/ocelot/felix.c b/drivers/net/dsa/ocelot/felix.c
index e764d8646d0b..0b3f7345d13d 100644
--- a/drivers/net/dsa/ocelot/felix.c
+++ b/drivers/net/dsa/ocelot/felix.c
@@ -740,7 +740,8 @@ static int felix_lag_change(struct dsa_switch *ds, int port)
 }
 
 static int felix_vlan_prepare(struct dsa_switch *ds, int port,
-			      const struct switchdev_obj_port_vlan *vlan)
+			      const struct switchdev_obj_port_vlan *vlan,
+			      struct netlink_ext_ack *extack)
 {
 	struct ocelot *ocelot = ds->priv;
 	u16 flags = vlan->flags;
@@ -758,7 +759,8 @@ static int felix_vlan_prepare(struct dsa_switch *ds, int port,
 
 	return ocelot_vlan_prepare(ocelot, port, vlan->vid,
 				   flags & BRIDGE_VLAN_INFO_PVID,
-				   flags & BRIDGE_VLAN_INFO_UNTAGGED);
+				   flags & BRIDGE_VLAN_INFO_UNTAGGED,
+				   extack);
 }
 
 static int felix_vlan_filtering(struct dsa_switch *ds, int port, bool enabled,
@@ -777,7 +779,7 @@ static int felix_vlan_add(struct dsa_switch *ds, int port,
 	u16 flags = vlan->flags;
 	int err;
 
-	err = felix_vlan_prepare(ds, port, vlan);
+	err = felix_vlan_prepare(ds, port, vlan, extack);
 	if (err)
 		return err;
 
diff --git a/drivers/net/ethernet/mscc/ocelot.c b/drivers/net/ethernet/mscc/ocelot.c
index 8ec194178aa2..ccb8a9863890 100644
--- a/drivers/net/ethernet/mscc/ocelot.c
+++ b/drivers/net/ethernet/mscc/ocelot.c
@@ -259,16 +259,15 @@ int ocelot_port_vlan_filtering(struct ocelot *ocelot, int port,
 EXPORT_SYMBOL(ocelot_port_vlan_filtering);
 
 int ocelot_vlan_prepare(struct ocelot *ocelot, int port, u16 vid, bool pvid,
-			bool untagged)
+			bool untagged, struct netlink_ext_ack *extack)
 {
 	struct ocelot_port *ocelot_port = ocelot->ports[port];
 
 	/* Deny changing the native VLAN, but always permit deleting it */
 	if (untagged && ocelot_port->native_vlan.vid != vid &&
 	    ocelot_port->native_vlan.valid) {
-		dev_err(ocelot->dev,
-			"Port already has a native VLAN: %d\n",
-			ocelot_port->native_vlan.vid);
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Port already has a native VLAN");
 		return -EBUSY;
 	}
 
diff --git a/drivers/net/ethernet/mscc/ocelot_net.c b/drivers/net/ethernet/mscc/ocelot_net.c
index 04ca55ff0fd0..133634852ecf 100644
--- a/drivers/net/ethernet/mscc/ocelot_net.c
+++ b/drivers/net/ethernet/mscc/ocelot_net.c
@@ -385,17 +385,6 @@ static int ocelot_setup_tc(struct net_device *dev, enum tc_setup_type type,
 	return 0;
 }
 
-static int ocelot_vlan_vid_prepare(struct net_device *dev, u16 vid, bool pvid,
-				   bool untagged)
-{
-	struct ocelot_port_private *priv = netdev_priv(dev);
-	struct ocelot_port *ocelot_port = &priv->port;
-	struct ocelot *ocelot = ocelot_port->ocelot;
-	int port = priv->chip_port;
-
-	return ocelot_vlan_prepare(ocelot, port, vid, pvid, untagged);
-}
-
 static int ocelot_vlan_vid_add(struct net_device *dev, u16 vid, bool pvid,
 			       bool untagged)
 {
@@ -943,14 +932,26 @@ static int ocelot_port_attr_set(struct net_device *dev, const void *ctx,
 	return err;
 }
 
+static int ocelot_vlan_vid_prepare(struct net_device *dev, u16 vid, bool pvid,
+				   bool untagged, struct netlink_ext_ack *extack)
+{
+	struct ocelot_port_private *priv = netdev_priv(dev);
+	struct ocelot_port *ocelot_port = &priv->port;
+	struct ocelot *ocelot = ocelot_port->ocelot;
+	int port = priv->chip_port;
+
+	return ocelot_vlan_prepare(ocelot, port, vid, pvid, untagged, extack);
+}
+
 static int ocelot_port_obj_add_vlan(struct net_device *dev,
-				    const struct switchdev_obj_port_vlan *vlan)
+				    const struct switchdev_obj_port_vlan *vlan,
+				    struct netlink_ext_ack *extack)
 {
 	bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
 	bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID;
 	int ret;
 
-	ret = ocelot_vlan_vid_prepare(dev, vlan->vid, pvid, untagged);
+	ret = ocelot_vlan_vid_prepare(dev, vlan->vid, pvid, untagged, extack);
 	if (ret)
 		return ret;
 
@@ -1038,7 +1039,8 @@ static int ocelot_port_obj_add(struct net_device *dev, const void *ctx,
 	switch (obj->id) {
 	case SWITCHDEV_OBJ_ID_PORT_VLAN:
 		ret = ocelot_port_obj_add_vlan(dev,
-					       SWITCHDEV_OBJ_PORT_VLAN(obj));
+					       SWITCHDEV_OBJ_PORT_VLAN(obj),
+					       extack);
 		break;
 	case SWITCHDEV_OBJ_ID_PORT_MDB:
 		ret = ocelot_port_obj_add_mdb(dev, SWITCHDEV_OBJ_PORT_MDB(obj));
diff --git a/include/soc/mscc/ocelot.h b/include/soc/mscc/ocelot.h
index fb5681f7e61b..ac072303dadf 100644
--- a/include/soc/mscc/ocelot.h
+++ b/include/soc/mscc/ocelot.h
@@ -825,7 +825,7 @@ int ocelot_fdb_add(struct ocelot *ocelot, int port,
 int ocelot_fdb_del(struct ocelot *ocelot, int port,
 		   const unsigned char *addr, u16 vid);
 int ocelot_vlan_prepare(struct ocelot *ocelot, int port, u16 vid, bool pvid,
-			bool untagged);
+			bool untagged, struct netlink_ext_ack *extack);
 int ocelot_vlan_add(struct ocelot *ocelot, int port, u16 vid, bool pvid,
 		    bool untagged);
 int ocelot_vlan_del(struct ocelot *ocelot, int port, u16 vid);
-- 
2.25.1

[PATCH v2 net-next 2/3] net: mscc: ocelot: transmit the VLAN filtering restrictions via extack

[Vladimir Oltean]

We need to transmit more restrictions in future patches, convert this
one to netlink extack.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
 drivers/net/dsa/ocelot/felix.c         | 2 +-
 drivers/net/ethernet/mscc/ocelot.c     | 6 +++---
 drivers/net/ethernet/mscc/ocelot_net.c | 8 +++++---
 include/soc/mscc/ocelot.h              | 3 ++-
 4 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/drivers/net/dsa/ocelot/felix.c b/drivers/net/dsa/ocelot/felix.c
index 0b3f7345d13d..fdfb7954b203 100644
--- a/drivers/net/dsa/ocelot/felix.c
+++ b/drivers/net/dsa/ocelot/felix.c
@@ -768,7 +768,7 @@ static int felix_vlan_filtering(struct dsa_switch *ds, int port, bool enabled,
 {
 	struct ocelot *ocelot = ds->priv;
 
-	return ocelot_port_vlan_filtering(ocelot, port, enabled);
+	return ocelot_port_vlan_filtering(ocelot, port, enabled, extack);
 }
 
 static int felix_vlan_add(struct dsa_switch *ds, int port,
diff --git a/drivers/net/ethernet/mscc/ocelot.c b/drivers/net/ethernet/mscc/ocelot.c
index ccb8a9863890..e848e0379b5a 100644
--- a/drivers/net/ethernet/mscc/ocelot.c
+++ b/drivers/net/ethernet/mscc/ocelot.c
@@ -223,7 +223,7 @@ static void ocelot_port_set_pvid(struct ocelot *ocelot, int port,
 }
 
 int ocelot_port_vlan_filtering(struct ocelot *ocelot, int port,
-			       bool vlan_aware)
+			       bool vlan_aware, struct netlink_ext_ack *extack)
 {
 	struct ocelot_vcap_block *block = &ocelot->block[VCAP_IS1];
 	struct ocelot_port *ocelot_port = ocelot->ports[port];
@@ -233,8 +233,8 @@ int ocelot_port_vlan_filtering(struct ocelot *ocelot, int port,
 	list_for_each_entry(filter, &block->rules, list) {
 		if (filter->ingress_port_mask & BIT(port) &&
 		    filter->action.vid_replace_ena) {
-			dev_err(ocelot->dev,
-				"Cannot change VLAN state with vlan modify rules active\n");
+			NL_SET_ERR_MSG_MOD(extack,
+					   "Cannot change VLAN state with vlan modify rules active");
 			return -EBUSY;
 		}
 	}
diff --git a/drivers/net/ethernet/mscc/ocelot_net.c b/drivers/net/ethernet/mscc/ocelot_net.c
index 133634852ecf..d255ab2c2848 100644
--- a/drivers/net/ethernet/mscc/ocelot_net.c
+++ b/drivers/net/ethernet/mscc/ocelot_net.c
@@ -912,7 +912,8 @@ static int ocelot_port_attr_set(struct net_device *dev, const void *ctx,
 		ocelot_port_attr_ageing_set(ocelot, port, attr->u.ageing_time);
 		break;
 	case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
-		ocelot_port_vlan_filtering(ocelot, port, attr->u.vlan_filtering);
+		ocelot_port_vlan_filtering(ocelot, port, attr->u.vlan_filtering,
+					   extack);
 		break;
 	case SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED:
 		ocelot_port_attr_mc_set(ocelot, port, !attr->u.mc_disabled);
@@ -1132,14 +1133,15 @@ static int ocelot_switchdev_sync(struct ocelot *ocelot, int port,
 	ocelot_port_attr_ageing_set(ocelot, port, ageing_time);
 
 	return ocelot_port_vlan_filtering(ocelot, port,
-					  br_vlan_enabled(bridge_dev));
+					  br_vlan_enabled(bridge_dev),
+					  extack);
 }
 
 static int ocelot_switchdev_unsync(struct ocelot *ocelot, int port)
 {
 	int err;
 
-	err = ocelot_port_vlan_filtering(ocelot, port, false);
+	err = ocelot_port_vlan_filtering(ocelot, port, false, NULL);
 	if (err)
 		return err;
 
diff --git a/include/soc/mscc/ocelot.h b/include/soc/mscc/ocelot.h
index ac072303dadf..06706a9fd5b1 100644
--- a/include/soc/mscc/ocelot.h
+++ b/include/soc/mscc/ocelot.h
@@ -807,7 +807,8 @@ int ocelot_get_sset_count(struct ocelot *ocelot, int port, int sset);
 int ocelot_get_ts_info(struct ocelot *ocelot, int port,
 		       struct ethtool_ts_info *info);
 void ocelot_set_ageing_time(struct ocelot *ocelot, unsigned int msecs);
-int ocelot_port_vlan_filtering(struct ocelot *ocelot, int port, bool enabled);
+int ocelot_port_vlan_filtering(struct ocelot *ocelot, int port, bool enabled,
+			       struct netlink_ext_ack *extack);
 void ocelot_bridge_stp_state_set(struct ocelot *ocelot, int port, u8 state);
 void ocelot_apply_bridge_fwd_mask(struct ocelot *ocelot);
 int ocelot_port_pre_bridge_flags(struct ocelot *ocelot, int port,
-- 
2.25.1

[PATCH v2 net-next 3/3] net: mscc: ocelot: use helpers for port VLAN membership

[Vladimir Oltean]

This is a mostly cosmetic patch that creates some helpers for accessing
the VLAN table. These helpers are also a bit more careful in that they
do not modify the ocelot->vlan_mask unless the hardware operation
succeeded.

Not all callers check the return value (the init code doesn't), but anyway.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
 drivers/net/ethernet/mscc/ocelot.c | 60 ++++++++++++++++++++----------
 1 file changed, 40 insertions(+), 20 deletions(-)

diff --git a/drivers/net/ethernet/mscc/ocelot.c b/drivers/net/ethernet/mscc/ocelot.c
index e848e0379b5a..c581b955efb3 100644
--- a/drivers/net/ethernet/mscc/ocelot.c
+++ b/drivers/net/ethernet/mscc/ocelot.c
@@ -222,6 +222,33 @@ static void ocelot_port_set_pvid(struct ocelot *ocelot, int port,
 		       ANA_PORT_DROP_CFG, port);
 }
 
+static int ocelot_vlan_member_set(struct ocelot *ocelot, u32 vlan_mask, u16 vid)
+{
+	int err;
+
+	err = ocelot_vlant_set_mask(ocelot, vid, vlan_mask);
+	if (err)
+		return err;
+
+	ocelot->vlan_mask[vid] = vlan_mask;
+
+	return 0;
+}
+
+static int ocelot_vlan_member_add(struct ocelot *ocelot, int port, u16 vid)
+{
+	return ocelot_vlan_member_set(ocelot,
+				      ocelot->vlan_mask[vid] | BIT(port),
+				      vid);
+}
+
+static int ocelot_vlan_member_del(struct ocelot *ocelot, int port, u16 vid)
+{
+	return ocelot_vlan_member_set(ocelot,
+				      ocelot->vlan_mask[vid] & ~BIT(port),
+				      vid);
+}
+
 int ocelot_port_vlan_filtering(struct ocelot *ocelot, int port,
 			       bool vlan_aware, struct netlink_ext_ack *extack)
 {
@@ -278,13 +305,11 @@ EXPORT_SYMBOL(ocelot_vlan_prepare);
 int ocelot_vlan_add(struct ocelot *ocelot, int port, u16 vid, bool pvid,
 		    bool untagged)
 {
-	int ret;
+	int err;
 
-	/* Make the port a member of the VLAN */
-	ocelot->vlan_mask[vid] |= BIT(port);
-	ret = ocelot_vlant_set_mask(ocelot, vid, ocelot->vlan_mask[vid]);
-	if (ret)
-		return ret;
+	err = ocelot_vlan_member_add(ocelot, port, vid);
+	if (err)
+		return err;
 
 	/* Default ingress vlan classification */
 	if (pvid) {
@@ -311,13 +336,11 @@ EXPORT_SYMBOL(ocelot_vlan_add);
 int ocelot_vlan_del(struct ocelot *ocelot, int port, u16 vid)
 {
 	struct ocelot_port *ocelot_port = ocelot->ports[port];
-	int ret;
+	int err;
 
-	/* Stop the port from being a member of the vlan */
-	ocelot->vlan_mask[vid] &= ~BIT(port);
-	ret = ocelot_vlant_set_mask(ocelot, vid, ocelot->vlan_mask[vid]);
-	if (ret)
-		return ret;
+	err = ocelot_vlan_member_del(ocelot, port, vid);
+	if (err)
+		return err;
 
 	/* Ingress */
 	if (ocelot_port->pvid_vlan.vid == vid) {
@@ -339,6 +362,7 @@ EXPORT_SYMBOL(ocelot_vlan_del);
 
 static void ocelot_vlan_init(struct ocelot *ocelot)
 {
+	unsigned long all_ports = GENMASK(ocelot->num_phys_ports - 1, 0);
 	u16 port, vid;
 
 	/* Clear VLAN table, by default all ports are members of all VLANs */
@@ -347,23 +371,19 @@ static void ocelot_vlan_init(struct ocelot *ocelot)
 	ocelot_vlant_wait_for_completion(ocelot);
 
 	/* Configure the port VLAN memberships */
-	for (vid = 1; vid < VLAN_N_VID; vid++) {
-		ocelot->vlan_mask[vid] = 0;
-		ocelot_vlant_set_mask(ocelot, vid, ocelot->vlan_mask[vid]);
-	}
+	for (vid = 1; vid < VLAN_N_VID; vid++)
+		ocelot_vlan_member_set(ocelot, 0, vid);
 
 	/* Because VLAN filtering is enabled, we need VID 0 to get untagged
 	 * traffic.  It is added automatically if 8021q module is loaded, but
 	 * we can't rely on it since module may be not loaded.
 	 */
-	ocelot->vlan_mask[0] = GENMASK(ocelot->num_phys_ports - 1, 0);
-	ocelot_vlant_set_mask(ocelot, 0, ocelot->vlan_mask[0]);
+	ocelot_vlan_member_set(ocelot, all_ports, 0);
 
 	/* Set vlan ingress filter mask to all ports but the CPU port by
 	 * default.
 	 */
-	ocelot_write(ocelot, GENMASK(ocelot->num_phys_ports - 1, 0),
-		     ANA_VLANMASK);
+	ocelot_write(ocelot, all_ports, ANA_VLANMASK);
 
 	for (port = 0; port < ocelot->num_phys_ports; port++) {
 		ocelot_write_gix(ocelot, 0, REW_PORT_VLAN_CFG, port);
-- 
2.25.1

Re: [PATCH v2 net-next 0/3] Small ocelot VLAN improvements

[patchwork-bot+netdevbpf]

Hello:

This series was applied to netdev/net-next.git (refs/heads/master):

On Thu, 19 Aug 2021 20:40:05 +0300 you wrote:
> This small series propagates some VLAN restrictions via netlink extack
> and creates some helper functions instead of open-coding VLAN table
> manipulations from multiple places.
> 
> This is split from the larger "DSA FDB isolation" series, hence the v2
> tag:
> https://patchwork.kernel.org/project/netdevbpf/cover/20210818120150.892647-1-vladimir.oltean@nxp.com/
> 
> [...]

Here is the summary with links:
  - [v2,net-next,1/3] net: mscc: ocelot: transmit the "native VLAN" error via extack
    https://git.kernel.org/netdev/net-next/c/01af940e9be6
  - [v2,net-next,2/3] net: mscc: ocelot: transmit the VLAN filtering restrictions via extack
    https://git.kernel.org/netdev/net-next/c/3b95d1b29386
  - [v2,net-next,3/3] net: mscc: ocelot: use helpers for port VLAN membership
    https://git.kernel.org/netdev/net-next/c/bbf6a2d92361

You are awesome, thank you!
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