Commit 061f6a50 authored by Florian Fainelli's avatar Florian Fainelli Committed by David S. Miller

net: dsa: Add ndo_vlan_rx_{add, kill}_vid implementation

In order to properly support VLAN filtering being enabled/disabled on a
bridge, while having other ports being non bridge port members, we need
to support the ndo_vlan_rx_{add,kill}_vid callbacks in order to make
sure the non-bridge ports can continue receiving VLAN tags, even when
the switch is globally configured to do ingress/egress VID checking.

Since we can call dsa_port_vlan_{add,del} with a bridge_dev pointer
NULL, we now need to check that in these two functions.

We specifically deal with two possibly problematic cases:

- creating a bridge VLAN entry while there is an existing VLAN device
  claiming that same VID

- creating a VLAN device while there is an existing bridge VLAN entry
  with that VID

Those are both resolved with returning -EBUSY back to user-space.
Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent cc1d5bda
......@@ -291,7 +291,10 @@ int dsa_port_vlan_add(struct dsa_port *dp,
.vlan = vlan,
};
if (br_vlan_enabled(dp->bridge_dev))
/* Can be called from dsa_slave_port_obj_add() or
* dsa_slave_vlan_rx_add_vid()
*/
if (!dp->bridge_dev || br_vlan_enabled(dp->bridge_dev))
return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_ADD, &info);
return 0;
......@@ -306,10 +309,13 @@ int dsa_port_vlan_del(struct dsa_port *dp,
.vlan = vlan,
};
if (netif_is_bridge_master(vlan->obj.orig_dev))
if (vlan->obj.orig_dev && netif_is_bridge_master(vlan->obj.orig_dev))
return -EOPNOTSUPP;
if (br_vlan_enabled(dp->bridge_dev))
/* Can be called from dsa_slave_port_obj_del() or
* dsa_slave_vlan_rx_kill_vid()
*/
if (!dp->bridge_dev || br_vlan_enabled(dp->bridge_dev))
return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_DEL, &info);
return 0;
......
......@@ -983,6 +983,72 @@ static int dsa_slave_get_ts_info(struct net_device *dev,
return ds->ops->get_ts_info(ds, p->dp->index, ts);
}
static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
u16 vid)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
struct switchdev_obj_port_vlan vlan = {
.vid_begin = vid,
.vid_end = vid,
/* This API only allows programming tagged, non-PVID VIDs */
.flags = 0,
};
struct bridge_vlan_info info;
int ret;
/* Check for a possible bridge VLAN entry now since there is no
* need to emulate the switchdev prepare + commit phase.
*/
if (dp->bridge_dev) {
/* br_vlan_get_info() returns -EINVAL or -ENOENT if the
* device, respectively the VID is not found, returning
* 0 means success, which is a failure for us here.
*/
ret = br_vlan_get_info(dp->bridge_dev, vid, &info);
if (ret == 0)
return -EBUSY;
}
ret = dsa_port_vlan_add(dp, &vlan, NULL);
if (ret == -EOPNOTSUPP)
ret = 0;
return ret;
}
static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
u16 vid)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
struct switchdev_obj_port_vlan vlan = {
.vid_begin = vid,
.vid_end = vid,
/* This API only allows programming tagged, non-PVID VIDs */
.flags = 0,
};
struct bridge_vlan_info info;
int ret;
/* Check for a possible bridge VLAN entry now since there is no
* need to emulate the switchdev prepare + commit phase.
*/
if (dp->bridge_dev) {
/* br_vlan_get_info() returns -EINVAL or -ENOENT if the
* device, respectively the VID is not found, returning
* 0 means success, which is a failure for us here.
*/
ret = br_vlan_get_info(dp->bridge_dev, vid, &info);
if (ret == 0)
return -EBUSY;
}
ret = dsa_port_vlan_del(dp, &vlan);
if (ret == -EOPNOTSUPP)
ret = 0;
return ret;
}
static const struct ethtool_ops dsa_slave_ethtool_ops = {
.get_drvinfo = dsa_slave_get_drvinfo,
.get_regs_len = dsa_slave_get_regs_len,
......@@ -1048,6 +1114,8 @@ static const struct net_device_ops dsa_slave_netdev_ops = {
.ndo_setup_tc = dsa_slave_setup_tc,
.ndo_get_stats64 = dsa_slave_get_stats64,
.ndo_get_port_parent_id = dsa_slave_get_port_parent_id,
.ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid,
.ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid,
};
static const struct switchdev_ops dsa_slave_switchdev_ops = {
......@@ -1307,7 +1375,8 @@ int dsa_slave_create(struct dsa_port *port)
if (slave_dev == NULL)
return -ENOMEM;
slave_dev->features = master->vlan_features | NETIF_F_HW_TC;
slave_dev->features = master->vlan_features | NETIF_F_HW_TC |
NETIF_F_HW_VLAN_CTAG_FILTER;
slave_dev->hw_features |= NETIF_F_HW_TC;
slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
eth_hw_addr_inherit(slave_dev, master);
......
......@@ -12,6 +12,7 @@
#include <linux/netdevice.h>
#include <linux/notifier.h>
#include <linux/if_vlan.h>
#include <net/switchdev.h>
#include "dsa_priv.h"
......@@ -168,6 +169,43 @@ static int dsa_switch_mdb_del(struct dsa_switch *ds,
return 0;
}
static int dsa_port_vlan_device_check(struct net_device *vlan_dev,
int vlan_dev_vid,
void *arg)
{
struct switchdev_obj_port_vlan *vlan = arg;
u16 vid;
for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
if (vid == vlan_dev_vid)
return -EBUSY;
}
return 0;
}
static int dsa_port_vlan_check(struct dsa_switch *ds, int port,
const struct switchdev_obj_port_vlan *vlan)
{
const struct dsa_port *dp = dsa_to_port(ds, port);
int err = 0;
/* Device is not bridged, let it proceed with the VLAN device
* creation.
*/
if (!dp->bridge_dev)
return err;
/* dsa_slave_vlan_rx_{add,kill}_vid() cannot use the prepare pharse and
* already checks whether there is an overlapping bridge VLAN entry
* with the same VID, so here we only need to check that if we are
* adding a bridge VLAN entry there is not an overlapping VLAN device
* claiming that VID.
*/
return vlan_for_each(dp->slave, dsa_port_vlan_device_check,
(void *)vlan);
}
static int
dsa_switch_vlan_prepare_bitmap(struct dsa_switch *ds,
const struct switchdev_obj_port_vlan *vlan,
......@@ -179,6 +217,10 @@ dsa_switch_vlan_prepare_bitmap(struct dsa_switch *ds,
return -EOPNOTSUPP;
for_each_set_bit(port, bitmap, ds->num_ports) {
err = dsa_port_vlan_check(ds, port, vlan);
if (err)
return err;
err = ds->ops->port_vlan_prepare(ds, port, vlan);
if (err)
return err;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment