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devlink: add explicitly locked flavor of the rate node APIs

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We'll need an explicitly locked rate node API for netdevsim
to switch eswitch mode setting to locked.

Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2022-03-18 12:23:41 -07:00 committed by David S. Miller
parent 7a1b0b1a55
commit 8879b32a3a
2 changed files with 65 additions and 25 deletions
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4
include/net/devlink.h
View File

@ -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);

86
net/core/devlink.c
View File

@ -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);