From af3836df9a59e7339d60c9c46729a7d9094d0582 Mon Sep 17 00:00:00 2001 From: Jiri Pirko Date: Thu, 28 Mar 2019 13:56:37 +0100 Subject: [PATCH] net: devlink: introduce devlink_compat_phys_port_name_get() 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 Reviewed-by: Jakub Kicinski Signed-off-by: David S. Miller --- include/net/devlink.h | 9 +++++++++ net/core/dev.c | 11 ++++++++--- net/core/devlink.c | 28 ++++++++++++++++++++++++++-- 3 files changed, 43 insertions(+), 5 deletions(-) diff --git a/include/net/devlink.h b/include/net/devlink.h index 81b5ed04a341..85e577d6ec3b 100644 --- a/include/net/devlink.h +++ b/include/net/devlink.h @@ -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_ */ diff --git a/net/core/dev.c b/net/core/dev.c index 9ca2d3abfd1a..9823b7713f79 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -146,6 +146,7 @@ #include #include #include +#include #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); diff --git a/net/core/devlink.c b/net/core/devlink.c index 37d01c39071e..8bb2c3e3f202 100644 --- a/net/core/devlink.c +++ b/net/core/devlink.c @@ -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); -- 2.20.1