Skip to content

Commit

Permalink
net-sysfs: expose physical switch id for particular device
Browse files Browse the repository at this point in the history
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>
  • Loading branch information
Jiri Pirko authored and David S. Miller committed Dec 3, 2014
1 parent 82f2841 commit aecbe01
Show file tree
Hide file tree
Showing 2 changed files with 32 additions and 0 deletions.
8 changes: 8 additions & 0 deletions Documentation/ABI/testing/sysfs-class-net
Original file line number Diff line number Diff line change
Expand Up @@ -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.
24 changes: 24 additions & 0 deletions net/core/net-sysfs.c
Original file line number Diff line number Diff line change
Expand Up @@ -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>
Expand Down Expand Up @@ -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,
Expand All @@ -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);
Expand Down

0 comments on commit aecbe01

Please sign in to comment.