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Date: Sun, 12 Apr 2015 23:17:00 -0700
From: sfeldma@...il.com
To: netdev@...r.kernel.org
Cc: jiri@...nulli.us, roopa@...ulusnetworks.com, linux@...ck-us.net,
f.fainelli@...il.com, sridhar.samudrala@...el.com,
ronen.arad@...el.com, andrew@...n.ch
Subject: [PATCH net-next v4 06/24] switchdev: introduce swdev add/del obj ops
From: Scott Feldman <sfeldma@...il.com>
Like swdev attr get/set, add new swdev obj add/del. swdev objs will be
things like VLANs or FIB entries, so add/del fits better for objects than
get/set used for attributes.
Use same two-phase prepare-commit transaction model as in attr set.
Signed-off-by: Scott Feldman <sfeldma@...il.com>
---
include/net/switchdev.h | 32 +++++++++++++
net/switchdev/switchdev.c | 113 +++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 145 insertions(+)
diff --git a/include/net/switchdev.h b/include/net/switchdev.h
index 512945d..f5f7733 100644
--- a/include/net/switchdev.h
+++ b/include/net/switchdev.h
@@ -43,6 +43,16 @@ struct swdev_attr {
struct fib_info;
+enum swdev_obj_id {
+ SWDEV_OBJ_UNDEFINED,
+};
+
+struct swdev_obj {
+ enum swdev_obj_id id;
+ enum swdev_trans trans;
+ u32 flags;
+};
+
/**
* struct switchdev_ops - switchdev operations
*
@@ -50,6 +60,10 @@ struct fib_info;
*
* @swdev_port_attr_set: Set a port attribute (see swdev_attr).
*
+ * @swdev_port_obj_add: Add an object to port (see swdev_obj).
+ *
+ * @swdev_port_obj_del: Delete an object from port (see swdev_obj).
+ *
* @swdev_fib_ipv4_add: Called to add/modify IPv4 route to switch device.
*
* @swdev_fib_ipv4_del: Called to delete IPv4 route from switch device.
@@ -59,6 +73,10 @@ struct swdev_ops {
struct swdev_attr *attr);
int (*swdev_port_attr_set)(struct net_device *dev,
struct swdev_attr *attr);
+ int (*swdev_port_obj_add)(struct net_device *dev,
+ struct swdev_obj *obj);
+ int (*swdev_port_obj_del)(struct net_device *dev,
+ struct swdev_obj *obj);
int (*swdev_fib_ipv4_add)(struct net_device *dev, __be32 dst,
int dst_len, struct fib_info *fi,
u8 tos, u8 type, u32 nlflags,
@@ -93,6 +111,8 @@ netdev_switch_notifier_info_to_dev(const struct netdev_switch_notifier_info *inf
int swdev_port_attr_get(struct net_device *dev, struct swdev_attr *attr);
int swdev_port_attr_set(struct net_device *dev, struct swdev_attr *attr);
+int swdev_port_obj_add(struct net_device *dev, struct swdev_obj *obj);
+int swdev_port_obj_del(struct net_device *dev, struct swdev_obj *obj);
int register_netdev_switch_notifier(struct notifier_block *nb);
int unregister_netdev_switch_notifier(struct notifier_block *nb);
int call_netdev_switch_notifiers(unsigned long val, struct net_device *dev,
@@ -125,6 +145,18 @@ static inline int swdev_port_attr_set(struct net_device *dev,
return -EOPNOTSUPP;
}
+static inline int swdev_port_obj_add(struct net_device *dev,
+ enum swdev_obj *obj)
+{
+ return -EOPNOTSUPP;
+}
+
+static inline int swdev_port_obj_del(struct net_device *dev,
+ enum swdev_obj *obj)
+{
+ return -EOPNOTSUPP;
+}
+
static inline int register_netdev_switch_notifier(struct notifier_block *nb)
{
return 0;
diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c
index 6f81cbf..05fded9 100644
--- a/net/switchdev/switchdev.c
+++ b/net/switchdev/switchdev.c
@@ -194,6 +194,119 @@ int swdev_port_attr_set(struct net_device *dev, struct swdev_attr *attr)
}
EXPORT_SYMBOL_GPL(swdev_port_attr_set);
+int __swdev_port_obj_add(struct net_device *dev, struct swdev_obj *obj)
+{
+ const struct swdev_ops *ops = dev->swdev_ops;
+ struct net_device *lower_dev;
+ struct list_head *iter;
+ int err = -EOPNOTSUPP;
+
+ if (ops && ops->swdev_port_obj_add)
+ return ops->swdev_port_obj_add(dev, obj);
+
+ if (obj->flags & SWDEV_F_NO_RECURSE)
+ return err;
+
+ /* Switch device port(s) may be stacked under
+ * bond/team/vlan dev, so recurse down to add object on
+ * each port.
+ */
+
+ netdev_for_each_lower_dev(dev, lower_dev, iter) {
+ err = __swdev_port_obj_add(lower_dev, obj);
+ if (err)
+ break;
+ }
+
+ return err;
+}
+
+/**
+ * swdev_port_obj_add - Add port object
+ *
+ * @dev: port device
+ * @obj: object to add
+ *
+ * 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.
+ */
+int swdev_port_obj_add(struct net_device *dev, struct swdev_obj *obj)
+{
+ int err;
+
+ ASSERT_RTNL();
+
+ /* Phase I: prepare for obj add. Driver/device should fail
+ * here if there are going to be issues in the commit phase,
+ * such as lack of resources or support. The driver/device
+ * should reserve resources needed for the commit phase here,
+ * but should not commit the obj.
+ */
+
+ obj->trans = SWDEV_TRANS_PREPARE;
+ err = __swdev_port_obj_add(dev, obj);
+ if (err) {
+ /* Prepare phase failed: abort the transaction. Any
+ * resources reserved in the prepare phase are
+ * released.
+ */
+
+ obj->trans = SWDEV_TRANS_ABORT;
+ __swdev_port_obj_add(dev, obj);
+
+ return err;
+ }
+
+ /* Phase II: commit obj add. This cannot fail as a fault
+ * of driver/device. If it does, it's a bug in the driver/device
+ * because the driver said everythings was OK in phase I.
+ */
+
+ obj->trans = SWDEV_TRANS_COMMIT;
+ err = __swdev_port_obj_add(dev, obj);
+ WARN(err, "%s: Commit of object (id=%d) failed.\n", dev->name, obj->id);
+
+ return err;
+}
+EXPORT_SYMBOL_GPL(swdev_port_obj_add);
+
+/**
+ * swdev_port_obj_del - Delete port object
+ *
+ * @dev: port device
+ * @obj: object to delete
+ */
+int swdev_port_obj_del(struct net_device *dev, struct swdev_obj *obj)
+{
+ const struct swdev_ops *ops = dev->swdev_ops;
+ struct net_device *lower_dev;
+ struct list_head *iter;
+ int err = -EOPNOTSUPP;
+
+ if (ops && ops->swdev_port_obj_del)
+ return ops->swdev_port_obj_del(dev, obj);
+
+ if (obj->flags & SWDEV_F_NO_RECURSE)
+ return err;
+
+ /* Switch device port(s) may be stacked under
+ * bond/team/vlan dev, so recurse down to delete object on
+ * each port.
+ */
+
+ netdev_for_each_lower_dev(dev, lower_dev, iter) {
+ err = swdev_port_obj_del(lower_dev, obj);
+ if (err)
+ break;
+ }
+
+ return err;
+}
+EXPORT_SYMBOL_GPL(swdev_port_obj_del);
+
static DEFINE_MUTEX(netdev_switch_mutex);
static RAW_NOTIFIER_HEAD(netdev_switch_notif_chain);
--
1.7.10.4
--
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