diff options
| -rw-r--r-- | include/net/switchdev.h | 1 | ||||
| -rw-r--r-- | net/bridge/br_stp.c | 3 | ||||
| -rw-r--r-- | net/switchdev/switchdev.c | 108 |
3 files changed, 46 insertions, 66 deletions
diff --git a/include/net/switchdev.h b/include/net/switchdev.h index d1c7f901ea61..f7de6f8e9a4c 100644 --- a/include/net/switchdev.h +++ b/include/net/switchdev.h @@ -17,6 +17,7 @@ #define SWITCHDEV_F_NO_RECURSE BIT(0) #define SWITCHDEV_F_SKIP_EOPNOTSUPP BIT(1) +#define SWITCHDEV_F_DEFER BIT(2) struct switchdev_trans_item { struct list_head list; diff --git a/net/bridge/br_stp.c b/net/bridge/br_stp.c index db6d243defb2..80c34d70218c 100644 --- a/net/bridge/br_stp.c +++ b/net/bridge/br_stp.c @@ -41,13 +41,14 @@ void br_set_state(struct net_bridge_port *p, unsigned int state) { struct switchdev_attr attr = { .id = SWITCHDEV_ATTR_ID_PORT_STP_STATE, + .flags = SWITCHDEV_F_DEFER, .u.stp_state = state, }; int err; p->state = state; err = switchdev_port_attr_set(p->dev, &attr); - if (err && err != -EOPNOTSUPP) + if (err) br_warn(p->br, "error setting offload STP state on port %u(%s)\n", (unsigned int) p->port_no, p->dev->name); } diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c index 23b4e5b347dc..007b8f40df06 100644 --- a/net/switchdev/switchdev.c +++ b/net/switchdev/switchdev.c @@ -250,75 +250,12 @@ done: return err; } -struct switchdev_attr_set_work { - struct work_struct work; - struct net_device *dev; - struct switchdev_attr attr; -}; - -static void switchdev_port_attr_set_work(struct work_struct *work) -{ - struct switchdev_attr_set_work *asw = - container_of(work, struct switchdev_attr_set_work, work); - int err; - - rtnl_lock(); - err = switchdev_port_attr_set(asw->dev, &asw->attr); - if (err && err != -EOPNOTSUPP) - netdev_err(asw->dev, "failed (err=%d) to set attribute (id=%d)\n", - err, asw->attr.id); - rtnl_unlock(); - - dev_put(asw->dev); - kfree(work); -} - -static int switchdev_port_attr_set_defer(struct net_device *dev, - const struct switchdev_attr *attr) -{ - struct switchdev_attr_set_work *asw; - - asw = kmalloc(sizeof(*asw), GFP_ATOMIC); - if (!asw) - return -ENOMEM; - - INIT_WORK(&asw->work, switchdev_port_attr_set_work); - - dev_hold(dev); - asw->dev = dev; - memcpy(&asw->attr, attr, sizeof(asw->attr)); - - schedule_work(&asw->work); - - return 0; -} - -/** - * switchdev_port_attr_set - Set port attribute - * - * @dev: port device - * @attr: attribute to set - * - * Use a 2-phase prepare-commit transaction model to ensure - * system is not left in a partially updated state due to - * failure from driver/device. - */ -int switchdev_port_attr_set(struct net_device *dev, - const struct switchdev_attr *attr) +static int switchdev_port_attr_set_now(struct net_device *dev, + const struct switchdev_attr *attr) { struct switchdev_trans trans; int err; - if (!rtnl_is_locked()) { - /* Running prepare-commit transaction across stacked - * devices requires nothing moves, so if rtnl_lock is - * not held, schedule a worker thread to hold rtnl_lock - * while setting attr. - */ - - return switchdev_port_attr_set_defer(dev, attr); - } - switchdev_trans_init(&trans); /* Phase I: prepare for attr set. Driver/device should fail @@ -355,6 +292,47 @@ int switchdev_port_attr_set(struct net_device *dev, return err; } + +static void switchdev_port_attr_set_deferred(struct net_device *dev, + const void *data) +{ + const struct switchdev_attr *attr = data; + int err; + + err = switchdev_port_attr_set_now(dev, attr); + if (err && err != -EOPNOTSUPP) + netdev_err(dev, "failed (err=%d) to set attribute (id=%d)\n", + err, attr->id); +} + +static int switchdev_port_attr_set_defer(struct net_device *dev, + const struct switchdev_attr *attr) +{ + return switchdev_deferred_enqueue(dev, attr, sizeof(*attr), + switchdev_port_attr_set_deferred); +} + +/** + * switchdev_port_attr_set - Set port attribute + * + * @dev: port device + * @attr: attribute to set + * + * Use a 2-phase prepare-commit transaction model to ensure + * system is not left in a partially updated state due to + * failure from driver/device. + * + * rtnl_lock must be held and must not be in atomic section, + * in case SWITCHDEV_F_DEFER flag is not set. + */ +int switchdev_port_attr_set(struct net_device *dev, + const struct switchdev_attr *attr) +{ + if (attr->flags & SWITCHDEV_F_DEFER) + return switchdev_port_attr_set_defer(dev, attr); + ASSERT_RTNL(); + return switchdev_port_attr_set_now(dev, attr); +} EXPORT_SYMBOL_GPL(switchdev_port_attr_set); static int __switchdev_port_obj_add(struct net_device *dev, |