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net: switchdev: Replace port attr set SDO with a notification 

Drop switchdev_ops.switchdev_port_attr_set. Drop the uses of this field
from all clients, which were migrated to use switchdev notification in
the previous patches.

Add a new function switchdev_port_attr_notify() that sends the switchdev
notifications SWITCHDEV_PORT_ATTR_SET and calls the blocking (process)
notifier chain.

We have one odd case within net/bridge/br_switchdev.c with the
SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS attribute identifier that
requires executing from atomic context, we deal with that one
specifically.

Drop __switchdev_port_attr_set() and update switchdev_port_attr_set()
likewise.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2019-02-27 11:44:31 -08:00 committed by David S. Miller
parent 570b68c8dd
commit d45224d604
2 changed files with 32 additions and 31 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
net/bridge/br_switchdev.c
View File

@ -67,12 +67,18 @@ int br_switchdev_set_port_flag(struct net_bridge_port *p,
.id = SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS,
.u.brport_flags = mask,
};
struct switchdev_notifier_port_attr_info info = {
.attr = &attr,
};
int err;
if (mask & ~BR_PORT_FLAGS_HW_OFFLOAD)
return 0;
err = switchdev_port_attr_set(p->dev, &attr);
/* We run from atomic context here */
err = call_switchdev_notifiers(SWITCHDEV_PORT_ATTR_SET, p->dev,
&info.info, NULL);
err = notifier_to_errno(err);
if (err == -EOPNOTSUPP)
return 0;

55
net/switchdev/switchdev.c
View File

@ -174,39 +174,32 @@ static int switchdev_deferred_enqueue(struct net_device *dev,
return 0;
}
static int __switchdev_port_attr_set(struct net_device *dev,
const struct switchdev_attr *attr,
struct switchdev_trans *trans)
static int switchdev_port_attr_notify(enum switchdev_notifier_type nt,
struct net_device *dev,
const struct switchdev_attr *attr,
struct switchdev_trans *trans)
{
const struct switchdev_ops *ops = dev->switchdev_ops;
struct net_device *lower_dev;
struct list_head *iter;
int err = -EOPNOTSUPP;
int err;
int rc;
if (ops && ops->switchdev_port_attr_set) {
err = ops->switchdev_port_attr_set(dev, attr, trans);
goto done;
struct switchdev_notifier_port_attr_info attr_info = {
.attr = attr,
.trans = trans,
.handled = false,
};
rc = call_switchdev_blocking_notifiers(nt, dev,
&attr_info.info, NULL);
err = notifier_to_errno(rc);
if (err) {
WARN_ON(!attr_info.handled);
return err;
}
if (attr->flags & SWITCHDEV_F_NO_RECURSE)
goto done;
if (!attr_info.handled)
return -EOPNOTSUPP;
/* Switch device port(s) may be stacked under
* bond/team/vlan dev, so recurse down to set attr on
* each port.
*/
netdev_for_each_lower_dev(dev, lower_dev, iter) {
err = __switchdev_port_attr_set(lower_dev, attr, trans);
if (err)
break;
}
done:
if (err == -EOPNOTSUPP && attr->flags & SWITCHDEV_F_SKIP_EOPNOTSUPP)
err = 0;
return err;
return 0;
}
static int switchdev_port_attr_set_now(struct net_device *dev,
@ -225,7 +218,8 @@ static int switchdev_port_attr_set_now(struct net_device *dev,
*/
trans.ph_prepare = true;
err = __switchdev_port_attr_set(dev, attr, &trans);
err = switchdev_port_attr_notify(SWITCHDEV_PORT_ATTR_SET, dev, attr,
&trans);
if (err) {
/* Prepare phase failed: abort the transaction. Any
* resources reserved in the prepare phase are
@ -244,7 +238,8 @@ static int switchdev_port_attr_set_now(struct net_device *dev,
*/
trans.ph_prepare = false;
err = __switchdev_port_attr_set(dev, attr, &trans);
err = switchdev_port_attr_notify(SWITCHDEV_PORT_ATTR_SET, dev, attr,
&trans);
WARN(err, "%s: Commit of attribute (id=%d) failed.\n",
dev->name, attr->id);
switchdev_trans_items_warn_destroy(dev, &trans);