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net: devlink: introduce devlink_compat_phys_port_name_get()

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Introduce devlink_compat_phys_port_name_get() helper that
gets the physical port name for specified netdevice
according to devlink port attributes.
Call this helper from dev_get_phys_port_name()
in case ndo_get_phys_port_name is not defined.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko 2019-03-28 13:56:37 +01:00 committed by David S. Miller
parent 5dc37bb9b0
commit af3836df9a
3 changed files with 43 additions and 5 deletions
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9
include/net/devlink.h
View File

@ -739,6 +739,8 @@ devlink_health_reporter_state_update(struct devlink_health_reporter *reporter,
void devlink_compat_running_version(struct net_device *dev,
char *buf, size_t len);
int devlink_compat_flash_update(struct net_device *dev, const char *file_name);
int devlink_compat_phys_port_name_get(struct net_device *dev,
char *name, size_t len);
#else
@ -753,6 +755,13 @@ devlink_compat_flash_update(struct net_device *dev, const char *file_name)
return -EOPNOTSUPP;
}
static inline int
devlink_compat_phys_port_name_get(struct net_device *dev,
char *name, size_t len)
{
return -EOPNOTSUPP;
}
#endif
#endif /* _NET_DEVLINK_H_ */

11
net/core/dev.c
View File

@ -146,6 +146,7 @@
#include <net/udp_tunnel.h>
#include <linux/net_namespace.h>
#include <linux/indirect_call_wrapper.h>
#include <net/devlink.h>
#include "net-sysfs.h"
@ -7877,10 +7878,14 @@ int dev_get_phys_port_name(struct net_device *dev,
char *name, size_t len)
{
const struct net_device_ops *ops = dev->netdev_ops;
int err;
if (!ops->ndo_get_phys_port_name)
return -EOPNOTSUPP;
return ops->ndo_get_phys_port_name(dev, name, len);
if (ops->ndo_get_phys_port_name) {
err = ops->ndo_get_phys_port_name(dev, name, len);
if (err != -EOPNOTSUPP)
return err;
}
return devlink_compat_phys_port_name_get(dev, name, len);
}
EXPORT_SYMBOL(dev_get_phys_port_name);

28
net/core/devlink.c
View File

@ -5414,8 +5414,8 @@ void devlink_port_attrs_set(struct devlink_port *devlink_port,
}
EXPORT_SYMBOL_GPL(devlink_port_attrs_set);
int devlink_port_get_phys_port_name(struct devlink_port *devlink_port,
char *name, size_t len)
static int __devlink_port_phys_port_name_get(struct devlink_port *devlink_port,
char *name, size_t len)
{
struct devlink_port_attrs *attrs = &devlink_port->attrs;
int n = 0;
@ -5445,6 +5445,12 @@ int devlink_port_get_phys_port_name(struct devlink_port *devlink_port,
return 0;
}
int devlink_port_get_phys_port_name(struct devlink_port *devlink_port,
char *name, size_t len)
{
return __devlink_port_phys_port_name_get(devlink_port, name, len);
}
EXPORT_SYMBOL_GPL(devlink_port_get_phys_port_name);
int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
@ -6459,6 +6465,24 @@ out:
return ret;
}
int devlink_compat_phys_port_name_get(struct net_device *dev,
char *name, size_t len)
{
struct devlink_port *devlink_port;
/* RTNL mutex is held here which ensures that devlink_port
* instance cannot disappear in the middle. No need to take
* any devlink lock as only permanent values are accessed.
*/
ASSERT_RTNL();
devlink_port = netdev_to_devlink_port(dev);
if (!devlink_port)
return -EOPNOTSUPP;
return __devlink_port_phys_port_name_get(devlink_port, name, len);
}
static int __init devlink_init(void)
{
return genl_register_family(&devlink_nl_family);