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devlink: create a special NDO for getting the devlink instance 

Instead of iterating over all devlink ports add a NDO which
will return the devlink instance from the driver.

v2: add the netdev_to_devlink() helper (Michal)
v3: check that devlink has ops (Florian)
v4: hold devlink_mutex (Jiri)

Suggested-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2019-02-25 19:34:03 -08:00 committed by David S. Miller
parent f4b6bcc700
commit b473b0d235
3 changed files with 33 additions and 39 deletions
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7
include/linux/netdevice.h
View File

@ -941,6 +941,8 @@ struct dev_ifalias {
char ifalias[];
};
struct devlink;
/*
* This structure defines the management hooks for network devices.
* The following hooks can be defined; unless noted otherwise, they are
@ -1249,6 +1251,10 @@ struct dev_ifalias {
* that got dropped are freed/returned via xdp_return_frame().
* Returns negative number, means general error invoking ndo, meaning
* no frames were xmit'ed and core-caller will free all frames.
* struct devlink *(*ndo_get_devlink)(struct net_device *dev);
* Get devlink instance associated with a given netdev.
* Called with a reference on the netdevice and devlink locks only,
* rtnl_lock is not held.
*/
struct net_device_ops {
int (*ndo_init)(struct net_device *dev);
@ -1447,6 +1453,7 @@ struct net_device_ops {
u32 flags);
int (*ndo_xsk_async_xmit)(struct net_device *dev,
u32 queue_id);
struct devlink * (*ndo_get_devlink)(struct net_device *dev);
};
/**

9
include/net/devlink.h
View File

@ -538,6 +538,15 @@ static inline struct devlink *priv_to_devlink(void *priv)
return container_of(priv, struct devlink, priv);
}
static inline struct devlink *netdev_to_devlink(struct net_device *dev)
{
#if IS_ENABLED(CONFIG_NET_DEVLINK)
if (dev->netdev_ops->ndo_get_devlink)
return dev->netdev_ops->ndo_get_devlink(dev);
#endif
return NULL;
}
struct ib_device;
#if IS_ENABLED(CONFIG_NET_DEVLINK)

56
net/core/devlink.c
View File

@ -6397,9 +6397,6 @@ static void __devlink_compat_running_version(struct devlink *devlink,
struct sk_buff *msg;
int rem, err;
if (!devlink->ops->info_get)
return;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
@ -6431,55 +6428,36 @@ static void __devlink_compat_running_version(struct devlink *devlink,
void devlink_compat_running_version(struct net_device *dev,
char *buf, size_t len)
{
struct devlink_port *devlink_port;
struct devlink *devlink;
mutex_lock(&devlink_mutex);
list_for_each_entry(devlink, &devlink_list, list) {
mutex_lock(&devlink->lock);
list_for_each_entry(devlink_port, &devlink->port_list, list) {
if (devlink_port->type == DEVLINK_PORT_TYPE_ETH &&
devlink_port->type_dev == dev) {
__devlink_compat_running_version(devlink,
buf, len);
mutex_unlock(&devlink->lock);
goto out;
}
}
mutex_unlock(&devlink->lock);
}
out:
devlink = netdev_to_devlink(dev);
if (!devlink || !devlink->ops || !devlink->ops->info_get)
goto unlock_list;
mutex_lock(&devlink->lock);
__devlink_compat_running_version(devlink, buf, len);
mutex_unlock(&devlink->lock);
unlock_list:
mutex_unlock(&devlink_mutex);
}
int devlink_compat_flash_update(struct net_device *dev, const char *file_name)
{
struct devlink_port *devlink_port;
struct devlink *devlink;
int ret = -EOPNOTSUPP;
mutex_lock(&devlink_mutex);
list_for_each_entry(devlink, &devlink_list, list) {
mutex_lock(&devlink->lock);
list_for_each_entry(devlink_port, &devlink->port_list, list) {
int ret = -EOPNOTSUPP;
devlink = netdev_to_devlink(dev);
if (!devlink || !devlink->ops || !devlink->ops->flash_update)
goto unlock_list;
if (devlink_port->type != DEVLINK_PORT_TYPE_ETH ||
devlink_port->type_dev != dev)
continue;
mutex_unlock(&devlink_mutex);
if (devlink->ops->flash_update)
ret = devlink->ops->flash_update(devlink,
file_name,
NULL, NULL);
mutex_unlock(&devlink->lock);
return ret;
}
mutex_unlock(&devlink->lock);
}
mutex_lock(&devlink->lock);
ret = devlink->ops->flash_update(devlink, file_name, NULL, NULL);
mutex_unlock(&devlink->lock);
unlock_list:
mutex_unlock(&devlink_mutex);
return -EOPNOTSUPP;
return ret;
}
static int __init devlink_init(void)