netdev - [PATCH net-next 1/3] net: Add sysfs file for port number

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Message-Id: <1393345072-31584-2-git-send-email-amirv@mellanox.com>
Date:	Tue, 25 Feb 2014 18:17:50 +0200
From:	Amir Vadai <amirv@...lanox.com>
To:	"David S. Miller" <davem@...emloft.net>
Cc:	Or Gerlitz <ogerlitz@...lanox.com>,
	Yevgeny Petrilin <yevgenyp@...lanox.com>,
	Amir Vadai <amirv@...lanox.com>, netdev@...r.kernel.org
Subject: [PATCH net-next 1/3] net: Add sysfs file for port number

Add a sysfs file to enable user space to query the device
port number used by a netdevice instance. This is needed for
devices that have multiple ports on the same PCI function.

Signed-off-by: Amir Vadai <amirv@...lanox.com>
---
 include/linux/netdevice.h | 4 ++++
 net/core/net-sysfs.c      | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 5e47565..5e84483 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1279,6 +1279,10 @@ struct net_device {
 						 * that share the same link
 						 * layer address
 						 */
+	unsigned short          dev_port;	/* Used to differentiate
+						 * devices that share the same
+						 * function
+						 */
 	spinlock_t		addr_list_lock;
 	struct netdev_hw_addr_list	uc;	/* Unicast mac addresses */
 	struct netdev_hw_addr_list	mc;	/* Multicast mac addresses */
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index 73aa594..daed9a6 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -104,6 +104,7 @@ static ssize_t netdev_store(struct device *dev, struct device_attribute *attr,
 }
 
 NETDEVICE_SHOW_RO(dev_id, fmt_hex);
+NETDEVICE_SHOW_RO(dev_port, fmt_dec);
 NETDEVICE_SHOW_RO(addr_assign_type, fmt_dec);
 NETDEVICE_SHOW_RO(addr_len, fmt_dec);
 NETDEVICE_SHOW_RO(iflink, fmt_dec);
@@ -373,6 +374,7 @@ static struct attribute *net_class_attrs[] = {
 	&dev_attr_netdev_group.attr,
 	&dev_attr_type.attr,
 	&dev_attr_dev_id.attr,
+	&dev_attr_dev_port.attr,
 	&dev_attr_iflink.attr,
 	&dev_attr_ifindex.attr,
 	&dev_attr_addr_assign_type.attr,
-- 
1.8.3.4

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