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net: dsa: install VLANs into the master's RX filter too

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Most DSA switch tags shift the EtherType to the right, causing the
master to not parse the VLAN as VLAN.
However, not all switches do that (example: tail tags, tag_8021q etc),
and if the DSA master has "rx-vlan-filter: on" in ethtool -k, then we
have a problem.

Therefore, we could populate the VLAN table of the master, just in case
(for some switches it will not make a difference), so that network I/O
can work even with a VLAN filtering master.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vladimir Oltean 2020-09-21 03:10:29 +03:00 committed by David S. Miller
parent adb256eb17
commit 2209158c90
1 changed files with 32 additions and 4 deletions
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36
net/dsa/slave.c
View file

@ -329,9 +329,10 @@ static int dsa_slave_vlan_add(struct net_device *dev,
const struct switchdev_obj *obj,
struct switchdev_trans *trans)
{
struct net_device *master = dsa_slave_to_master(dev);
struct dsa_port *dp = dsa_slave_to_port(dev);
struct switchdev_obj_port_vlan vlan;
int err;
int vid, err;
if (obj->orig_dev != dev)
return -EOPNOTSUPP;
@ -366,6 +367,12 @@ static int dsa_slave_vlan_add(struct net_device *dev,
if (err)
return err;
for (vid = vlan.vid_begin; vid <= vlan.vid_end; vid++) {
err = vlan_vid_add(master, htons(ETH_P_8021Q), vid);
if (err)
return err;
}
return 0;
}
@ -409,7 +416,10 @@ static int dsa_slave_port_obj_add(struct net_device *dev,
static int dsa_slave_vlan_del(struct net_device *dev,
const struct switchdev_obj *obj)
{
struct net_device *master = dsa_slave_to_master(dev);
struct dsa_port *dp = dsa_slave_to_port(dev);
struct switchdev_obj_port_vlan *vlan;
int vid, err;
if (obj->orig_dev != dev)
return -EOPNOTSUPP;
@ -417,10 +427,19 @@ static int dsa_slave_vlan_del(struct net_device *dev,
if (dsa_port_skip_vlan_configuration(dp))
return 0;
vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
/* Do not deprogram the CPU port as it may be shared with other user
* ports which can be members of this VLAN as well.
*/
return dsa_port_vlan_del(dp, SWITCHDEV_OBJ_PORT_VLAN(obj));
err = dsa_port_vlan_del(dp, vlan);
if (err)
return err;
for (vid = vlan->vid_begin; vid <= vlan->vid_end; vid++)
vlan_vid_del(master, htons(ETH_P_8021Q), vid);
return 0;
}
static int dsa_slave_port_obj_del(struct net_device *dev,
@ -1265,6 +1284,7 @@ static int dsa_slave_get_ts_info(struct net_device *dev,
static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
u16 vid)
{
struct net_device *master = dsa_slave_to_master(dev);
struct dsa_port *dp = dsa_slave_to_port(dev);
struct switchdev_obj_port_vlan vlan = {
.obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
@ -1298,12 +1318,13 @@ static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
if (ret)
return ret;
return 0;
return vlan_vid_add(master, proto, vid);
}
static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
u16 vid)
{
struct net_device *master = dsa_slave_to_master(dev);
struct dsa_port *dp = dsa_slave_to_port(dev);
struct switchdev_obj_port_vlan vlan = {
.vid_begin = vid,
@ -1311,11 +1332,18 @@ static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
/* This API only allows programming tagged, non-PVID VIDs */
.flags = 0,
};
int err;
/* Do not deprogram the CPU port as it may be shared with other user
* ports which can be members of this VLAN as well.
*/
return dsa_port_vlan_del(dp, &vlan);
err = dsa_port_vlan_del(dp, &vlan);
if (err)
return err;
vlan_vid_del(master, proto, vid);
return 0;
}
struct dsa_hw_port {