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Date: Fri, 18 Mar 2022 12:23:41 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, jiri@...nulli.us, leonro@...dia.com,
saeedm@...dia.com, idosch@...sch.org, michael.chan@...adcom.com,
simon.horman@...igine.com, Jakub Kicinski <kuba@...nel.org>,
Jiri Pirko <jiri@...dia.com>
Subject: [PATCH net-next v2 2/5] devlink: add explicitly locked flavor of the rate node APIs
We'll need an explicitly locked rate node API for netdevsim
to switch eswitch mode setting to locked.
Reviewed-by: Jiri Pirko <jiri@...dia.com>
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
---
include/net/devlink.h | 4 ++
net/core/devlink.c | 86 ++++++++++++++++++++++++++++++-------------
2 files changed, 65 insertions(+), 25 deletions(-)
diff --git a/include/net/devlink.h b/include/net/devlink.h
index fd89a17adea1..a30180c0988a 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -1490,6 +1490,10 @@ int devl_port_register(struct devlink *devlink,
unsigned int port_index);
void devl_port_unregister(struct devlink_port *devlink_port);
+int devl_rate_leaf_create(struct devlink_port *port, void *priv);
+void devl_rate_leaf_destroy(struct devlink_port *devlink_port);
+void devl_rate_nodes_destroy(struct devlink *devlink);
+
struct ib_device;
struct net *devlink_net(const struct devlink *devlink);
diff --git a/net/core/devlink.c b/net/core/devlink.c
index f2a277053ec6..5aac5370c136 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -2868,7 +2868,7 @@ static int devlink_rate_nodes_check(struct devlink *devlink, u16 mode,
{
struct devlink_rate *devlink_rate;
- /* Take the lock to sync with devlink_rate_nodes_destroy() */
+ /* Take the lock to sync with destroy */
mutex_lock(&devlink->lock);
list_for_each_entry(devlink_rate, &devlink->rate_list, list)
if (devlink_rate_is_node(devlink_rate)) {
@@ -9548,30 +9548,26 @@ void devlink_port_attrs_pci_sf_set(struct devlink_port *devlink_port, u32 contro
EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_sf_set);
/**
- * devlink_rate_leaf_create - create devlink rate leaf
- *
+ * devl_rate_leaf_create - create devlink rate leaf
* @devlink_port: devlink port object to create rate object on
* @priv: driver private data
*
* Create devlink rate object of type leaf on provided @devlink_port.
- * Throws call trace if @devlink_port already has a devlink rate object.
- *
- * Context: Takes and release devlink->lock <mutex>.
- *
- * Return: -ENOMEM if failed to allocate rate object, 0 otherwise.
*/
-int
-devlink_rate_leaf_create(struct devlink_port *devlink_port, void *priv)
+int devl_rate_leaf_create(struct devlink_port *devlink_port, void *priv)
{
struct devlink *devlink = devlink_port->devlink;
struct devlink_rate *devlink_rate;
+ devl_assert_locked(devlink_port->devlink);
+
+ if (WARN_ON(devlink_port->devlink_rate))
+ return -EBUSY;
+
devlink_rate = kzalloc(sizeof(*devlink_rate), GFP_KERNEL);
if (!devlink_rate)
return -ENOMEM;
- mutex_lock(&devlink->lock);
- WARN_ON(devlink_port->devlink_rate);
devlink_rate->type = DEVLINK_RATE_TYPE_LEAF;
devlink_rate->devlink = devlink;
devlink_rate->devlink_port = devlink_port;
@@ -9579,12 +9575,42 @@ devlink_rate_leaf_create(struct devlink_port *devlink_port, void *priv)
list_add_tail(&devlink_rate->list, &devlink->rate_list);
devlink_port->devlink_rate = devlink_rate;
devlink_rate_notify(devlink_rate, DEVLINK_CMD_RATE_NEW);
- mutex_unlock(&devlink->lock);
return 0;
}
+EXPORT_SYMBOL_GPL(devl_rate_leaf_create);
+
+int
+devlink_rate_leaf_create(struct devlink_port *devlink_port, void *priv)
+{
+ struct devlink *devlink = devlink_port->devlink;
+ int ret;
+
+ mutex_lock(&devlink->lock);
+ ret = devl_rate_leaf_create(devlink_port, priv);
+ mutex_unlock(&devlink->lock);
+
+ return ret;
+}
EXPORT_SYMBOL_GPL(devlink_rate_leaf_create);
+void devl_rate_leaf_destroy(struct devlink_port *devlink_port)
+{
+ struct devlink_rate *devlink_rate = devlink_port->devlink_rate;
+
+ devl_assert_locked(devlink_port->devlink);
+ if (!devlink_rate)
+ return;
+
+ devlink_rate_notify(devlink_rate, DEVLINK_CMD_RATE_DEL);
+ if (devlink_rate->parent)
+ refcount_dec(&devlink_rate->parent->refcnt);
+ list_del(&devlink_rate->list);
+ devlink_port->devlink_rate = NULL;
+ kfree(devlink_rate);
+}
+EXPORT_SYMBOL_GPL(devl_rate_leaf_destroy);
+
/**
* devlink_rate_leaf_destroy - destroy devlink rate leaf
*
@@ -9601,32 +9627,25 @@ void devlink_rate_leaf_destroy(struct devlink_port *devlink_port)
return;
mutex_lock(&devlink->lock);
- devlink_rate_notify(devlink_rate, DEVLINK_CMD_RATE_DEL);
- if (devlink_rate->parent)
- refcount_dec(&devlink_rate->parent->refcnt);
- list_del(&devlink_rate->list);
- devlink_port->devlink_rate = NULL;
+ devl_rate_leaf_destroy(devlink_port);
mutex_unlock(&devlink->lock);
- kfree(devlink_rate);
}
EXPORT_SYMBOL_GPL(devlink_rate_leaf_destroy);
/**
- * devlink_rate_nodes_destroy - destroy all devlink rate nodes on device
- *
+ * devl_rate_nodes_destroy - destroy all devlink rate nodes on device
* @devlink: devlink instance
*
* Unset parent for all rate objects and destroy all rate nodes
* on specified device.
- *
- * Context: Takes and release devlink->lock <mutex>.
*/
-void devlink_rate_nodes_destroy(struct devlink *devlink)
+void devl_rate_nodes_destroy(struct devlink *devlink)
{
static struct devlink_rate *devlink_rate, *tmp;
const struct devlink_ops *ops = devlink->ops;
- mutex_lock(&devlink->lock);
+ devl_assert_locked(devlink);
+
list_for_each_entry(devlink_rate, &devlink->rate_list, list) {
if (!devlink_rate->parent)
continue;
@@ -9647,6 +9666,23 @@ void devlink_rate_nodes_destroy(struct devlink *devlink)
kfree(devlink_rate);
}
}
+}
+EXPORT_SYMBOL_GPL(devl_rate_nodes_destroy);
+
+/**
+ * devlink_rate_nodes_destroy - destroy all devlink rate nodes on device
+ *
+ * @devlink: devlink instance
+ *
+ * Unset parent for all rate objects and destroy all rate nodes
+ * on specified device.
+ *
+ * Context: Takes and release devlink->lock <mutex>.
+ */
+void devlink_rate_nodes_destroy(struct devlink *devlink)
+{
+ mutex_lock(&devlink->lock);
+ devl_rate_nodes_destroy(devlink);
mutex_unlock(&devlink->lock);
}
EXPORT_SYMBOL_GPL(devlink_rate_nodes_destroy);
--
2.34.1
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