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net: dsa: Setup dsa_netdev_ops

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Now that we have all the infrastructure in place for calling into the
dsa_ptr->netdev_ops function pointers, install them when we configure
the DSA CPU/management interface and tear them down. The flow is
unchanged from before, but now we preserve equality of tests when
network device drivers do tests like dev->netdev_ops == &foo_ops which
was not the case before since we were allocating an entirely new
structure.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2020-07-19 20:49:54 -07:00 committed by David S. Miller
parent 3369afba1e
commit 9c0c7014f3
2 changed files with 13 additions and 40 deletions
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1
include/net/dsa.h
View File

@ -230,7 +230,6 @@ struct dsa_port {
* Original copy of the master netdev net_device_ops
*/
const struct dsa_netdevice_ops *netdev_ops;
const struct net_device_ops *orig_ndo_ops;
bool setup;
};

52
net/dsa/master.c
View File

@ -220,12 +220,17 @@ static int dsa_master_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
break;
}
if (cpu_dp->orig_ndo_ops && cpu_dp->orig_ndo_ops->ndo_do_ioctl)
err = cpu_dp->orig_ndo_ops->ndo_do_ioctl(dev, ifr, cmd);
if (dev->netdev_ops->ndo_do_ioctl)
err = dev->netdev_ops->ndo_do_ioctl(dev, ifr, cmd);
return err;
}
static const struct dsa_netdevice_ops dsa_netdev_ops = {
.ndo_do_ioctl = dsa_master_ioctl,
.ndo_get_phys_port_name = dsa_master_get_phys_port_name,
};
static int dsa_master_ethtool_setup(struct net_device *dev)
{
struct dsa_port *cpu_dp = dev->dsa_ptr;
@ -260,38 +265,10 @@ static void dsa_master_ethtool_teardown(struct net_device *dev)
cpu_dp->orig_ethtool_ops = NULL;
}
static int dsa_master_ndo_setup(struct net_device *dev)
static void dsa_netdev_ops_set(struct net_device *dev,
const struct dsa_netdevice_ops *ops)
{
struct dsa_port *cpu_dp = dev->dsa_ptr;
struct dsa_switch *ds = cpu_dp->ds;
struct net_device_ops *ops;
if (dev->netdev_ops->ndo_get_phys_port_name)
return 0;
ops = devm_kzalloc(ds->dev, sizeof(*ops), GFP_KERNEL);
if (!ops)
return -ENOMEM;
cpu_dp->orig_ndo_ops = dev->netdev_ops;
if (cpu_dp->orig_ndo_ops)
memcpy(ops, cpu_dp->orig_ndo_ops, sizeof(*ops));
ops->ndo_get_phys_port_name = dsa_master_get_phys_port_name;
ops->ndo_do_ioctl = dsa_master_ioctl;
dev->netdev_ops = ops;
return 0;
}
static void dsa_master_ndo_teardown(struct net_device *dev)
{
struct dsa_port *cpu_dp = dev->dsa_ptr;
if (cpu_dp->orig_ndo_ops)
dev->netdev_ops = cpu_dp->orig_ndo_ops;
cpu_dp->orig_ndo_ops = NULL;
dev->dsa_ptr->netdev_ops = ops;
}
static ssize_t tagging_show(struct device *d, struct device_attribute *attr,
@ -353,9 +330,7 @@ int dsa_master_setup(struct net_device *dev, struct dsa_port *cpu_dp)
if (ret)
return ret;
ret = dsa_master_ndo_setup(dev);
if (ret)
goto out_err_ethtool_teardown;
dsa_netdev_ops_set(dev, &dsa_netdev_ops);
ret = sysfs_create_group(&dev->dev.kobj, &dsa_group);
if (ret)
@ -364,8 +339,7 @@ int dsa_master_setup(struct net_device *dev, struct dsa_port *cpu_dp)
return ret;
out_err_ndo_teardown:
dsa_master_ndo_teardown(dev);
out_err_ethtool_teardown:
dsa_netdev_ops_set(dev, NULL);
dsa_master_ethtool_teardown(dev);
return ret;
}
@ -373,7 +347,7 @@ out_err_ethtool_teardown:
void dsa_master_teardown(struct net_device *dev)
{
sysfs_remove_group(&dev->dev.kobj, &dsa_group);
dsa_master_ndo_teardown(dev);
dsa_netdev_ops_set(dev, NULL);
dsa_master_ethtool_teardown(dev);
dsa_master_reset_mtu(dev);