diff options
| author | Jiri Pirko <jiri@resnulli.us> | 2014-11-28 14:34:19 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-12-02 20:01:22 -0800 |
| commit | aecbe01e7410ad2de022796472f531ae6941f15e (patch) | |
| tree | daa2d66fbd4bbfb58b2ab8892708c8634537d209 | |
| parent | 82f2841291cfaf4d225aa1766424280254d3e3b2 (diff) | |
net-sysfs: expose physical switch id for particular device
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Reviewed-by: Thomas Graf <tgraf@suug.ch>
Acked-by: John Fastabend <john.r.fastabend@intel.com>
Acked-by: Andy Gospodarek <gospo@cumulusnetworks.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | Documentation/ABI/testing/sysfs-class-net | 8 | ||||
| -rw-r--r-- | net/core/net-sysfs.c | 24 |
2 files changed, 32 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-net b/Documentation/ABI/testing/sysfs-class-net index e1b2e785bba8..beb8ec4dabbc 100644 --- a/Documentation/ABI/testing/sysfs-class-net +++ b/Documentation/ABI/testing/sysfs-class-net @@ -216,3 +216,11 @@ Contact: netdev@vger.kernel.org Description: Indicates the interface protocol type as a decimal value. See include/uapi/linux/if_arp.h for all possible values. + +What: /sys/class/net/<iface>/phys_switch_id +Date: November 2014 +KernelVersion: 3.19 +Contact: netdev@vger.kernel.org +Description: + Indicates the unique physical switch identifier of a switch this + port belongs to, as a string. diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c index 26c46f4726c5..999341244434 100644 --- a/net/core/net-sysfs.c +++ b/net/core/net-sysfs.c @@ -12,6 +12,7 @@ #include <linux/capability.h> #include <linux/kernel.h> #include <linux/netdevice.h> +#include <net/switchdev.h> #include <linux/if_arp.h> #include <linux/slab.h> #include <linux/nsproxy.h> @@ -416,6 +417,28 @@ static ssize_t phys_port_id_show(struct device *dev, } static DEVICE_ATTR_RO(phys_port_id); +static ssize_t phys_switch_id_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct net_device *netdev = to_net_dev(dev); + ssize_t ret = -EINVAL; + + if (!rtnl_trylock()) + return restart_syscall(); + + if (dev_isalive(netdev)) { + struct netdev_phys_item_id ppid; + + ret = netdev_switch_parent_id_get(netdev, &ppid); + if (!ret) + ret = sprintf(buf, "%*phN\n", ppid.id_len, ppid.id); + } + rtnl_unlock(); + + return ret; +} +static DEVICE_ATTR_RO(phys_switch_id); + static struct attribute *net_class_attrs[] = { &dev_attr_netdev_group.attr, &dev_attr_type.attr, @@ -441,6 +464,7 @@ static struct attribute *net_class_attrs[] = { &dev_attr_tx_queue_len.attr, &dev_attr_gro_flush_timeout.attr, &dev_attr_phys_port_id.attr, + &dev_attr_phys_switch_id.attr, NULL, }; ATTRIBUTE_GROUPS(net_class); |