From d45224d604c5ba6ac5f9d6fddbe1d058c81dee80 Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Wed, 27 Feb 2019 11:44:31 -0800 Subject: [PATCH] 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 Reviewed-by: Ido Schimmel Signed-off-by: David S. Miller --- net/bridge/br_switchdev.c | 8 +++++- net/switchdev/switchdev.c | 55 ++++++++++++++++++--------------------- 2 files changed, 32 insertions(+), 31 deletions(-) diff --git a/net/bridge/br_switchdev.c b/net/bridge/br_switchdev.c index af57c4a2b78a..921310d3cbae 100644 --- a/net/bridge/br_switchdev.c +++ b/net/bridge/br_switchdev.c @@ -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; diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c index 3560c19aa7e2..d81cfcee9ad9 100644 --- a/net/switchdev/switchdev.c +++ b/net/switchdev/switchdev.c @@ -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);