[PATCH v2 1/3] net: add support for phys_port_name

[PATCH v2 1/3] net: add support for phys_port_name

[David Ahern]

Similar to port id allow netdevices to specify port names and export
the name via sysfs. Drivers can implement the netdevice operation to
assist udev in having sane default names for the devices using the
rule:

$ cat /etc/udev/rules.d/80-net-setup-link.rules
SUBSYSTEM=="net", ACTION=="add", ATTR{phys_port_name}!="",
NAME="$attr{phys_port_name}"

Use of phys_name versus phys_id was suggested-by Jiri Pirko.

v2:
- replaced netdev_phys_item_name with buffer and length per Jiri's comment

Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: Scott Feldman <sfeldma@gmail.com>
---
 include/linux/netdevice.h    |  4 ++++
 include/uapi/linux/if_link.h |  1 +
 net/core/dev.c               | 18 ++++++++++++++++++
 net/core/net-sysfs.c         | 23 +++++++++++++++++++++++
 net/core/rtnetlink.c         | 21 +++++++++++++++++++++
 5 files changed, 67 insertions(+)

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index dd1d069758be..d4df818d6606 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1159,6 +1159,8 @@ struct net_device_ops {
 						      bool new_carrier);
 	int			(*ndo_get_phys_port_id)(struct net_device *dev,
 							struct netdev_phys_item_id *ppid);
+	int			(*ndo_get_phys_port_name)(struct net_device *dev,
+							  char *buf, int len);
 	void			(*ndo_add_vxlan_port)(struct  net_device *dev,
 						      sa_family_t sa_family,
 						      __be16 port);
@@ -2939,6 +2941,8 @@ int dev_set_mac_address(struct net_device *, struct sockaddr *);
 int dev_change_carrier(struct net_device *, bool new_carrier);
 int dev_get_phys_port_id(struct net_device *dev,
 			 struct netdev_phys_item_id *ppid);
+int dev_get_phys_port_name(struct net_device *dev,
+			   char *buf, int len);
 struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev);
 struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
 				    struct netdev_queue *txq, int *ret);
diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
index 756436e1ce89..7158fd00a109 100644
--- a/include/uapi/linux/if_link.h
+++ b/include/uapi/linux/if_link.h
@@ -147,6 +147,7 @@ enum {
 	IFLA_CARRIER_CHANGES,
 	IFLA_PHYS_SWITCH_ID,
 	IFLA_LINK_NETNSID,
+	IFLA_PHYS_PORT_NAME,
 	__IFLA_MAX
 };
 
diff --git a/net/core/dev.c b/net/core/dev.c
index 39fe369b46ad..ae2a1ecf33be 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5912,6 +5912,24 @@ int dev_get_phys_port_id(struct net_device *dev,
 EXPORT_SYMBOL(dev_get_phys_port_id);
 
 /**
+ *	dev_get_phys_port_name - Get device physical port name
+ *	@dev: device
+ *	@name: port name
+ *
+ *	Get device physical port name
+ */
+int dev_get_phys_port_name(struct net_device *dev,
+			   char *buf, int len)
+{
+	const struct net_device_ops *ops = dev->netdev_ops;
+
+	if (!ops->ndo_get_phys_port_name)
+		return -EOPNOTSUPP;
+	return ops->ndo_get_phys_port_name(dev, buf, len);
+}
+EXPORT_SYMBOL(dev_get_phys_port_name);
+
+/**
  *	dev_new_index	-	allocate an ifindex
  *	@net: the applicable net namespace
  *
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index cf30620a88e1..b2a673870c4b 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -418,6 +418,28 @@ static ssize_t phys_port_id_show(struct device *dev,
 }
 static DEVICE_ATTR_RO(phys_port_id);
 
+static ssize_t phys_port_name_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)) {
+		char name[IFNAMSIZ];
+
+		ret = dev_get_phys_port_name(netdev, name, sizeof(name));
+		if (!ret)
+			ret = sprintf(buf, "%s\n", name);
+	}
+	rtnl_unlock();
+
+	return ret;
+}
+static DEVICE_ATTR_RO(phys_port_name);
+
 static ssize_t phys_switch_id_show(struct device *dev,
 				   struct device_attribute *attr, char *buf)
 {
@@ -465,6 +487,7 @@ 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_port_name.attr,
 	&dev_attr_phys_switch_id.attr,
 	NULL,
 };
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 25b4b5d23485..7227b5695394 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -982,6 +982,24 @@ static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
 	return 0;
 }
 
+static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
+{
+	char buf[IFNAMSIZ];
+	int err;
+
+	err = dev_get_phys_port_name(dev, buf, sizeof(buf));
+	if (err) {
+		if (err == -EOPNOTSUPP)
+			return 0;
+		return err;
+	}
+
+	if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(buf), buf))
+		return -EMSGSIZE;
+
+	return 0;
+}
+
 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
 {
 	int err;
@@ -1072,6 +1090,9 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
 	if (rtnl_phys_port_id_fill(skb, dev))
 		goto nla_put_failure;
 
+	if (rtnl_phys_port_name_fill(skb, dev))
+		goto nla_put_failure;
+
 	if (rtnl_phys_switch_id_fill(skb, dev))
 		goto nla_put_failure;
 
-- 
2.2.1

[PATCH v2 2/3] rocker: add support for phys_port_name

[David Ahern]

Implement the phys_port_name operation. Port names are pulled from the
rocker hardware model in qemu and default to the qemu name + port id.
e.g.,

sw1p1: flags=4098<BROADCAST,MULTICAST>  mtu 1500
        ether 52:54:00:12:35:01  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

where 'sw1' comes from the qemu command line -device rocker,name=sw1, and
'p1' is port 1.

Patch is adapted from Scott's phys_port_id patch.

v2:
- updated per changes in prior patch requested by Jiri

Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Scott Feldman <sfeldma@gmail.com>
Cc: Jiri Pirko <jiri@resnulli.us>
---
 drivers/net/ethernet/rocker/rocker.c | 64 ++++++++++++++++++++++++++++++++++++
 drivers/net/ethernet/rocker/rocker.h |  1 +
 2 files changed, 65 insertions(+)

diff --git a/drivers/net/ethernet/rocker/rocker.c b/drivers/net/ethernet/rocker/rocker.c
index 2511ae22ccd8..e201e7ef9bcf 100644
--- a/drivers/net/ethernet/rocker/rocker.c
+++ b/drivers/net/ethernet/rocker/rocker.c
@@ -30,6 +30,7 @@
 #include <linux/if_vlan.h>
 #include <linux/if_bridge.h>
 #include <linux/bitops.h>
+#include <linux/ctype.h>
 #include <net/switchdev.h>
 #include <net/rtnetlink.h>
 #include <net/ip_fib.h>
@@ -1630,6 +1631,53 @@ rocker_cmd_get_port_settings_macaddr_proc(struct rocker *rocker,
 	return 0;
 }
 
+struct port_name {
+	char *buf;
+	int len;
+};
+
+static int
+rocker_cmd_get_port_settings_phys_name_proc(struct rocker *rocker,
+					    struct rocker_port *rocker_port,
+					    struct rocker_desc_info *desc_info,
+					    void *priv)
+{
+	struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
+	struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
+	struct port_name *name = priv;
+	struct rocker_tlv *attr;
+	int i, j = 0, len;
+	char *str;
+
+	rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
+	if (!attrs[ROCKER_TLV_CMD_INFO])
+		return -EIO;
+
+	rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
+				attrs[ROCKER_TLV_CMD_INFO]);
+	attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_PHYS_NAME];
+	if (!attr)
+		return -EIO;
+
+	len = min_t(int, rocker_tlv_len(attr), name->len);
+	str = rocker_tlv_data(attr);
+
+	/* make sure name only contains alphanumeric characters */
+	for (i = 0; i < len; ++i) {
+		if (isalnum(str[i])) {
+			name->buf[j] = str[i];
+			j++;
+		}
+	}
+
+	if (j == 0)
+		return -EIO;
+
+	name->buf[j] = '\0';
+
+	return 0;
+}
+
 static int
 rocker_cmd_set_port_settings_ethtool_prep(struct rocker *rocker,
 					  struct rocker_port *rocker_port,
@@ -4138,6 +4186,21 @@ static int rocker_port_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 				       rocker_port->brport_flags, mask);
 }
 
+static int rocker_port_get_phys_port_name(struct net_device *dev,
+					  char *buf, int len)
+{
+	struct rocker_port *rocker_port = netdev_priv(dev);
+	struct port_name name = { .buf = buf, .len = len };
+	int err;
+
+	err = rocker_cmd_exec(rocker_port->rocker, rocker_port,
+			      rocker_cmd_get_port_settings_prep, NULL,
+			      rocker_cmd_get_port_settings_phys_name_proc,
+			      &name, false);
+
+	return err ? -EOPNOTSUPP : 0;
+}
+
 static const struct net_device_ops rocker_port_netdev_ops = {
 	.ndo_open			= rocker_port_open,
 	.ndo_stop			= rocker_port_stop,
@@ -4150,6 +4213,7 @@ static const struct net_device_ops rocker_port_netdev_ops = {
 	.ndo_fdb_dump			= rocker_port_fdb_dump,
 	.ndo_bridge_setlink		= rocker_port_bridge_setlink,
 	.ndo_bridge_getlink		= rocker_port_bridge_getlink,
+	.ndo_get_phys_port_name		= rocker_port_get_phys_port_name,
 };
 
 /********************
diff --git a/drivers/net/ethernet/rocker/rocker.h b/drivers/net/ethernet/rocker/rocker.h
index 51e430d25138..a4e9591d7457 100644
--- a/drivers/net/ethernet/rocker/rocker.h
+++ b/drivers/net/ethernet/rocker/rocker.h
@@ -158,6 +158,7 @@ enum {
 	ROCKER_TLV_CMD_PORT_SETTINGS_MACADDR,		/* binary */
 	ROCKER_TLV_CMD_PORT_SETTINGS_MODE,		/* u8 */
 	ROCKER_TLV_CMD_PORT_SETTINGS_LEARNING,		/* u8 */
+	ROCKER_TLV_CMD_PORT_SETTINGS_PHYS_NAME,		/* binary */
 
 	__ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
 	ROCKER_TLV_CMD_PORT_SETTINGS_MAX =
-- 
2.2.1

Re: [PATCH v2 2/3] rocker: add support for phys_port_name

[Philip Prindeville]

Inline

On 03/16/2015 09:27 PM, David Ahern wrote:
> Implement the phys_port_name operation. Port names are pulled from the
> rocker hardware model in qemu and default to the qemu name + port id.
> e.g.,
>
> sw1p1: flags=4098<BROADCAST,MULTICAST>  mtu 1500
>         ether 52:54:00:12:35:01  txqueuelen 1000  (Ethernet)
>         RX packets 0  bytes 0 (0.0 B)
>         RX errors 0  dropped 0  overruns 0  frame 0
>         TX packets 0  bytes 0 (0.0 B)
>         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
>
> where 'sw1' comes from the qemu command line -device rocker,name=sw1, and
> 'p1' is port 1.
>
> Patch is adapted from Scott's phys_port_id patch.
>
> v2:
> - updated per changes in prior patch requested by Jiri
>
> Signed-off-by: David Ahern <dsahern@gmail.com>
> Cc: Scott Feldman <sfeldma@gmail.com>
> Cc: Jiri Pirko <jiri@resnulli.us>
> ---
>  drivers/net/ethernet/rocker/rocker.c | 64 ++++++++++++++++++++++++++++++++++++
>  drivers/net/ethernet/rocker/rocker.h |  1 +
>  2 files changed, 65 insertions(+)
>
> diff --git a/drivers/net/ethernet/rocker/rocker.c b/drivers/net/ethernet/rocker/rocker.c
> index 2511ae22ccd8..e201e7ef9bcf 100644
> --- a/drivers/net/ethernet/rocker/rocker.c
> +++ b/drivers/net/ethernet/rocker/rocker.c
> @@ -30,6 +30,7 @@
>  #include <linux/if_vlan.h>
>  #include <linux/if_bridge.h>
>  #include <linux/bitops.h>
> +#include <linux/ctype.h>
>  #include <net/switchdev.h>
>  #include <net/rtnetlink.h>
>  #include <net/ip_fib.h>
> @@ -1630,6 +1631,53 @@ rocker_cmd_get_port_settings_macaddr_proc(struct rocker *rocker,
>  	return 0;
>  }
>  
> +struct port_name {
> +	char *buf;
> +	int len;

I'd use "unsigned" for the len, since it's never going to be negative.

> +};
> +
> +static int
> +rocker_cmd_get_port_settings_phys_name_proc(struct rocker *rocker,
> +					    struct rocker_port *rocker_port,
> +					    struct rocker_desc_info *desc_info,
> +					    void *priv)
> +{
> +	struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
> +	struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
> +	struct port_name *name = priv;
> +	struct rocker_tlv *attr;
> +	int i, j = 0, len;

I'd make 'i' and 'j' unsigned.


> +	char *str;
> +
> +	rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
> +	if (!attrs[ROCKER_TLV_CMD_INFO])
> +		return -EIO;
> +
> +	rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
> +				attrs[ROCKER_TLV_CMD_INFO]);
> +	attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_PHYS_NAME];
> +	if (!attr)
> +		return -EIO;
> +
> +	len = min_t(int, rocker_tlv_len(attr), name->len);
> +	str = rocker_tlv_data(attr);
> +
> +	/* make sure name only contains alphanumeric characters */
> +	for (i = 0; i < len; ++i) {

Rather than hiding the initialization of 'j' above, I'd do:

i = j = 0;

instead.

> +		if (isalnum(str[i])) {
> +			name->buf[j] = str[i];
> +			j++;
> +		}
> +	}
> +
> +	if (j == 0)
> +		return -EIO;
> +
> +	name->buf[j] = '\0';
> +
> +	return 0;
> +}
> +
>  static int
>  rocker_cmd_set_port_settings_ethtool_prep(struct rocker *rocker,
>  					  struct rocker_port *rocker_port,
> @@ -4138,6 +4186,21 @@ static int rocker_port_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
>  				       rocker_port->brport_flags, mask);
>  }
>  
> +static int rocker_port_get_phys_port_name(struct net_device *dev,
> +					  char *buf, int len)

I'd use unsigned for 'len'.

> +{
> +	struct rocker_port *rocker_port = netdev_priv(dev);
> +	struct port_name name = { .buf = buf, .len = len };
> +	int err;
> +
> +	err = rocker_cmd_exec(rocker_port->rocker, rocker_port,
> +			      rocker_cmd_get_port_settings_prep, NULL,
> +			      rocker_cmd_get_port_settings_phys_name_proc,
> +			      &name, false);
> +
> +	return err ? -EOPNOTSUPP : 0;
> +}
> +
>  static const struct net_device_ops rocker_port_netdev_ops = {
>  	.ndo_open			= rocker_port_open,
>  	.ndo_stop			= rocker_port_stop,
> @@ -4150,6 +4213,7 @@ static const struct net_device_ops rocker_port_netdev_ops = {
>  	.ndo_fdb_dump			= rocker_port_fdb_dump,
>  	.ndo_bridge_setlink		= rocker_port_bridge_setlink,
>  	.ndo_bridge_getlink		= rocker_port_bridge_getlink,
> +	.ndo_get_phys_port_name		= rocker_port_get_phys_port_name,
>  };
>  
>  /********************
> diff --git a/drivers/net/ethernet/rocker/rocker.h b/drivers/net/ethernet/rocker/rocker.h
> index 51e430d25138..a4e9591d7457 100644
> --- a/drivers/net/ethernet/rocker/rocker.h
> +++ b/drivers/net/ethernet/rocker/rocker.h
> @@ -158,6 +158,7 @@ enum {
>  	ROCKER_TLV_CMD_PORT_SETTINGS_MACADDR,		/* binary */
>  	ROCKER_TLV_CMD_PORT_SETTINGS_MODE,		/* u8 */
>  	ROCKER_TLV_CMD_PORT_SETTINGS_LEARNING,		/* u8 */
> +	ROCKER_TLV_CMD_PORT_SETTINGS_PHYS_NAME,		/* binary */
>  
>  	__ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
>  	ROCKER_TLV_CMD_PORT_SETTINGS_MAX =

Re: [PATCH v2 2/3] rocker: add support for phys_port_name

[Jiri Pirko]

Tue, Mar 17, 2015 at 05:27:25AM CET, philipp@redfish-solutions.com wrote:
>Inline
>
>On 03/16/2015 09:27 PM, David Ahern wrote:
>> Implement the phys_port_name operation. Port names are pulled from the
>> rocker hardware model in qemu and default to the qemu name + port id.
>> e.g.,
>>
>> sw1p1: flags=4098<BROADCAST,MULTICAST>  mtu 1500
>>         ether 52:54:00:12:35:01  txqueuelen 1000  (Ethernet)
>>         RX packets 0  bytes 0 (0.0 B)
>>         RX errors 0  dropped 0  overruns 0  frame 0
>>         TX packets 0  bytes 0 (0.0 B)
>>         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
>>
>> where 'sw1' comes from the qemu command line -device rocker,name=sw1, and
>> 'p1' is port 1.
>>
>> Patch is adapted from Scott's phys_port_id patch.
>>
>> v2:
>> - updated per changes in prior patch requested by Jiri
>>
>> Signed-off-by: David Ahern <dsahern@gmail.com>
>> Cc: Scott Feldman <sfeldma@gmail.com>
>> Cc: Jiri Pirko <jiri@resnulli.us>
>> ---
>>  drivers/net/ethernet/rocker/rocker.c | 64 ++++++++++++++++++++++++++++++++++++
>>  drivers/net/ethernet/rocker/rocker.h |  1 +
>>  2 files changed, 65 insertions(+)
>>
>> diff --git a/drivers/net/ethernet/rocker/rocker.c b/drivers/net/ethernet/rocker/rocker.c
>> index 2511ae22ccd8..e201e7ef9bcf 100644
>> --- a/drivers/net/ethernet/rocker/rocker.c
>> +++ b/drivers/net/ethernet/rocker/rocker.c
>> @@ -30,6 +30,7 @@
>>  #include <linux/if_vlan.h>
>>  #include <linux/if_bridge.h>
>>  #include <linux/bitops.h>
>> +#include <linux/ctype.h>
>>  #include <net/switchdev.h>
>>  #include <net/rtnetlink.h>
>>  #include <net/ip_fib.h>
>> @@ -1630,6 +1631,53 @@ rocker_cmd_get_port_settings_macaddr_proc(struct rocker *rocker,
>>  	return 0;
>>  }
>>  
>> +struct port_name {
>> +	char *buf;
>> +	int len;
>
>I'd use "unsigned" for the len, since it's never going to be negative.

It think the best is just to use "size_t" for len


>
>> +};
>> +
>> +static int
>> +rocker_cmd_get_port_settings_phys_name_proc(struct rocker *rocker,
>> +					    struct rocker_port *rocker_port,
>> +					    struct rocker_desc_info *desc_info,
>> +					    void *priv)
>> +{
>> +	struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
>> +	struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
>> +	struct port_name *name = priv;
>> +	struct rocker_tlv *attr;
>> +	int i, j = 0, len;
>
>I'd make 'i' and 'j' unsigned.
>
>
>> +	char *str;
>> +
>> +	rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
>> +	if (!attrs[ROCKER_TLV_CMD_INFO])
>> +		return -EIO;
>> +
>> +	rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
>> +				attrs[ROCKER_TLV_CMD_INFO]);
>> +	attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_PHYS_NAME];
>> +	if (!attr)
>> +		return -EIO;
>> +
>> +	len = min_t(int, rocker_tlv_len(attr), name->len);
>> +	str = rocker_tlv_data(attr);
>> +
>> +	/* make sure name only contains alphanumeric characters */
>> +	for (i = 0; i < len; ++i) {
>
>Rather than hiding the initialization of 'j' above, I'd do:
>
>i = j = 0;
>
>instead.
>
>> +		if (isalnum(str[i])) {
>> +			name->buf[j] = str[i];
>> +			j++;
>> +		}
>> +	}
>> +
>> +	if (j == 0)
>> +		return -EIO;
>> +
>> +	name->buf[j] = '\0';
>> +
>> +	return 0;
>> +}
>> +
>>  static int
>>  rocker_cmd_set_port_settings_ethtool_prep(struct rocker *rocker,
>>  					  struct rocker_port *rocker_port,
>> @@ -4138,6 +4186,21 @@ static int rocker_port_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
>>  				       rocker_port->brport_flags, mask);
>>  }
>>  
>> +static int rocker_port_get_phys_port_name(struct net_device *dev,
>> +					  char *buf, int len)
>
>I'd use unsigned for 'len'.
>
>> +{
>> +	struct rocker_port *rocker_port = netdev_priv(dev);
>> +	struct port_name name = { .buf = buf, .len = len };
>> +	int err;
>> +
>> +	err = rocker_cmd_exec(rocker_port->rocker, rocker_port,
>> +			      rocker_cmd_get_port_settings_prep, NULL,
>> +			      rocker_cmd_get_port_settings_phys_name_proc,
>> +			      &name, false);
>> +
>> +	return err ? -EOPNOTSUPP : 0;
>> +}
>> +
>>  static const struct net_device_ops rocker_port_netdev_ops = {
>>  	.ndo_open			= rocker_port_open,
>>  	.ndo_stop			= rocker_port_stop,
>> @@ -4150,6 +4213,7 @@ static const struct net_device_ops rocker_port_netdev_ops = {
>>  	.ndo_fdb_dump			= rocker_port_fdb_dump,
>>  	.ndo_bridge_setlink		= rocker_port_bridge_setlink,
>>  	.ndo_bridge_getlink		= rocker_port_bridge_getlink,
>> +	.ndo_get_phys_port_name		= rocker_port_get_phys_port_name,
>>  };
>>  
>>  /********************
>> diff --git a/drivers/net/ethernet/rocker/rocker.h b/drivers/net/ethernet/rocker/rocker.h
>> index 51e430d25138..a4e9591d7457 100644
>> --- a/drivers/net/ethernet/rocker/rocker.h
>> +++ b/drivers/net/ethernet/rocker/rocker.h
>> @@ -158,6 +158,7 @@ enum {
>>  	ROCKER_TLV_CMD_PORT_SETTINGS_MACADDR,		/* binary */
>>  	ROCKER_TLV_CMD_PORT_SETTINGS_MODE,		/* u8 */
>>  	ROCKER_TLV_CMD_PORT_SETTINGS_LEARNING,		/* u8 */
>> +	ROCKER_TLV_CMD_PORT_SETTINGS_PHYS_NAME,		/* binary */
>>  
>>  	__ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
>>  	ROCKER_TLV_CMD_PORT_SETTINGS_MAX =
>

Re: [PATCH v2 2/3] rocker: add support for phys_port_name

[Philip Prindeville]

Inline

On 03/17/2015 01:08 AM, Jiri Pirko wrote:
> Tue, Mar 17, 2015 at 05:27:25AM CET, philipp@redfish-solutions.com wrote:
>> Inline
>>
>> On 03/16/2015 09:27 PM, David Ahern wrote:
>>> Implement the phys_port_name operation. Port names are pulled from the
>>> rocker hardware model in qemu and default to the qemu name + port id.
>>> e.g.,
>>>
>>> sw1p1: flags=4098<BROADCAST,MULTICAST>  mtu 1500
>>>         ether 52:54:00:12:35:01  txqueuelen 1000  (Ethernet)
>>>         RX packets 0  bytes 0 (0.0 B)
>>>         RX errors 0  dropped 0  overruns 0  frame 0
>>>         TX packets 0  bytes 0 (0.0 B)
>>>         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
>>>
>>> where 'sw1' comes from the qemu command line -device rocker,name=sw1, and
>>> 'p1' is port 1.
>>>
>>> Patch is adapted from Scott's phys_port_id patch.
>>>
>>> v2:
>>> - updated per changes in prior patch requested by Jiri
>>>
>>> Signed-off-by: David Ahern <dsahern@gmail.com>
>>> Cc: Scott Feldman <sfeldma@gmail.com>
>>> Cc: Jiri Pirko <jiri@resnulli.us>
>>> ---
>>>  drivers/net/ethernet/rocker/rocker.c | 64 ++++++++++++++++++++++++++++++++++++
>>>  drivers/net/ethernet/rocker/rocker.h |  1 +
>>>  2 files changed, 65 insertions(+)
>>>
>>> diff --git a/drivers/net/ethernet/rocker/rocker.c b/drivers/net/ethernet/rocker/rocker.c
>>> index 2511ae22ccd8..e201e7ef9bcf 100644
>>> --- a/drivers/net/ethernet/rocker/rocker.c
>>> +++ b/drivers/net/ethernet/rocker/rocker.c
>>> @@ -30,6 +30,7 @@
>>>  #include <linux/if_vlan.h>
>>>  #include <linux/if_bridge.h>
>>>  #include <linux/bitops.h>
>>> +#include <linux/ctype.h>
>>>  #include <net/switchdev.h>
>>>  #include <net/rtnetlink.h>
>>>  #include <net/ip_fib.h>
>>> @@ -1630,6 +1631,53 @@ rocker_cmd_get_port_settings_macaddr_proc(struct rocker *rocker,
>>>  	return 0;
>>>  }
>>>  
>>> +struct port_name {
>>> +	char *buf;
>>> +	int len;
>> I'd use "unsigned" for the len, since it's never going to be negative.
> It think the best is just to use "size_t" for len

Works for me.

-Philip

>>> +};
>>> +
>>> +static int
>>> +rocker_cmd_get_port_settings_phys_name_proc(struct rocker *rocker,
>>> +					    struct rocker_port *rocker_port,
>>> +					    struct rocker_desc_info *desc_info,
>>> +					    void *priv)
>>> +{
>>> +	struct rocker_tlv *info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_MAX + 1];
>>> +	struct rocker_tlv *attrs[ROCKER_TLV_CMD_MAX + 1];
>>> +	struct port_name *name = priv;
>>> +	struct rocker_tlv *attr;
>>> +	int i, j = 0, len;
>> I'd make 'i' and 'j' unsigned.
>>
>>
>>> +	char *str;
>>> +
>>> +	rocker_tlv_parse_desc(attrs, ROCKER_TLV_CMD_MAX, desc_info);
>>> +	if (!attrs[ROCKER_TLV_CMD_INFO])
>>> +		return -EIO;
>>> +
>>> +	rocker_tlv_parse_nested(info_attrs, ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
>>> +				attrs[ROCKER_TLV_CMD_INFO]);
>>> +	attr = info_attrs[ROCKER_TLV_CMD_PORT_SETTINGS_PHYS_NAME];
>>> +	if (!attr)
>>> +		return -EIO;
>>> +
>>> +	len = min_t(int, rocker_tlv_len(attr), name->len);
>>> +	str = rocker_tlv_data(attr);
>>> +
>>> +	/* make sure name only contains alphanumeric characters */
>>> +	for (i = 0; i < len; ++i) {
>> Rather than hiding the initialization of 'j' above, I'd do:
>>
>> i = j = 0;
>>
>> instead.
>>
>>> +		if (isalnum(str[i])) {
>>> +			name->buf[j] = str[i];
>>> +			j++;
>>> +		}
>>> +	}
>>> +
>>> +	if (j == 0)
>>> +		return -EIO;
>>> +
>>> +	name->buf[j] = '\0';
>>> +
>>> +	return 0;
>>> +}
>>> +
>>>  static int
>>>  rocker_cmd_set_port_settings_ethtool_prep(struct rocker *rocker,
>>>  					  struct rocker_port *rocker_port,
>>> @@ -4138,6 +4186,21 @@ static int rocker_port_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
>>>  				       rocker_port->brport_flags, mask);
>>>  }
>>>  
>>> +static int rocker_port_get_phys_port_name(struct net_device *dev,
>>> +					  char *buf, int len)
>> I'd use unsigned for 'len'.
>>
>>> +{
>>> +	struct rocker_port *rocker_port = netdev_priv(dev);
>>> +	struct port_name name = { .buf = buf, .len = len };
>>> +	int err;
>>> +
>>> +	err = rocker_cmd_exec(rocker_port->rocker, rocker_port,
>>> +			      rocker_cmd_get_port_settings_prep, NULL,
>>> +			      rocker_cmd_get_port_settings_phys_name_proc,
>>> +			      &name, false);
>>> +
>>> +	return err ? -EOPNOTSUPP : 0;
>>> +}
>>> +
>>>  static const struct net_device_ops rocker_port_netdev_ops = {
>>>  	.ndo_open			= rocker_port_open,
>>>  	.ndo_stop			= rocker_port_stop,
>>> @@ -4150,6 +4213,7 @@ static const struct net_device_ops rocker_port_netdev_ops = {
>>>  	.ndo_fdb_dump			= rocker_port_fdb_dump,
>>>  	.ndo_bridge_setlink		= rocker_port_bridge_setlink,
>>>  	.ndo_bridge_getlink		= rocker_port_bridge_getlink,
>>> +	.ndo_get_phys_port_name		= rocker_port_get_phys_port_name,
>>>  };
>>>  
>>>  /********************
>>> diff --git a/drivers/net/ethernet/rocker/rocker.h b/drivers/net/ethernet/rocker/rocker.h
>>> index 51e430d25138..a4e9591d7457 100644
>>> --- a/drivers/net/ethernet/rocker/rocker.h
>>> +++ b/drivers/net/ethernet/rocker/rocker.h
>>> @@ -158,6 +158,7 @@ enum {
>>>  	ROCKER_TLV_CMD_PORT_SETTINGS_MACADDR,		/* binary */
>>>  	ROCKER_TLV_CMD_PORT_SETTINGS_MODE,		/* u8 */
>>>  	ROCKER_TLV_CMD_PORT_SETTINGS_LEARNING,		/* u8 */
>>> +	ROCKER_TLV_CMD_PORT_SETTINGS_PHYS_NAME,		/* binary */
>>>  
>>>  	__ROCKER_TLV_CMD_PORT_SETTINGS_MAX,
>>>  	ROCKER_TLV_CMD_PORT_SETTINGS_MAX =
> --
> To unsubscribe from this list: send the line "unsubscribe netdev" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: [PATCH v2 2/3] rocker: add support for phys_port_name

[Scott Feldman]

On Mon, Mar 16, 2015 at 8:27 PM, David Ahern <dsahern@gmail.com> wrote:
> Implement the phys_port_name operation. Port names are pulled from the
> rocker hardware model in qemu and default to the qemu name + port id.
> e.g.,
>
> sw1p1: flags=4098<BROADCAST,MULTICAST>  mtu 1500
>         ether 52:54:00:12:35:01  txqueuelen 1000  (Ethernet)
>         RX packets 0  bytes 0 (0.0 B)
>         RX errors 0  dropped 0  overruns 0  frame 0
>         TX packets 0  bytes 0 (0.0 B)
>         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
>
> where 'sw1' comes from the qemu command line -device rocker,name=sw1, and
> 'p1' is port 1.
>
> Patch is adapted from Scott's phys_port_id patch.
>
> v2:
> - updated per changes in prior patch requested by Jiri
>
> Signed-off-by: David Ahern <dsahern@gmail.com>
> Cc: Scott Feldman <sfeldma@gmail.com>
> Cc: Jiri Pirko <jiri@resnulli.us>

Acked-by: Scott Feldman <sfeldma@gmail.com>

[PATCH 3/3] iproute2: Add support for phys_port_name

[David Ahern]

Display phys_port_name attribute if returned:

./ip link show sw1p1
4: sw1p1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop port name sw1p1 state DOWN mode DEFAULT group default qlen 1000
    link/ether 52:54:00:12:35:01 brd ff:ff:ff:ff:ff:ff

Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: Scott Feldman <sfeldma@gmail.com>

---
 include/linux/if_link.h | 1 +
 ip/ipaddress.c          | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/include/linux/if_link.h b/include/linux/if_link.h
index 3450c3fbdc65..c5ee8c91b1c6 100644
--- a/include/linux/if_link.h
+++ b/include/linux/if_link.h
@@ -147,6 +147,7 @@ enum {
 	IFLA_CARRIER_CHANGES,
 	IFLA_PHYS_SWITCH_ID,
 	IFLA_LINK_NETNSID,
+	IFLA_PHYS_PORT_NAME,
 	__IFLA_MAX
 };
 
diff --git a/ip/ipaddress.c b/ip/ipaddress.c
index 99a6ab5977e3..9e65015b7a48 100644
--- a/ip/ipaddress.c
+++ b/ip/ipaddress.c
@@ -645,6 +645,9 @@ int print_linkinfo(const struct sockaddr_nl *who,
 				      b1, sizeof(b1)));
 	}
 
+	if (tb[IFLA_PHYS_PORT_NAME])
+		fprintf(fp, "port name %s ", rta_getattr_str(tb[IFLA_PHYS_PORT_NAME]));
+
 	if (tb[IFLA_OPERSTATE])
 		print_operstate(fp, rta_getattr_u8(tb[IFLA_OPERSTATE]));
 
-- 
2.2.1

Re: [PATCH 3/3] iproute2: Add support for phys_port_name

[Jiri Pirko]

Tue, Mar 17, 2015 at 04:27:17AM CET, dsahern@gmail.com wrote:
>Display phys_port_name attribute if returned:
>
>./ip link show sw1p1
>4: sw1p1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop port name sw1p1 state DOWN mode DEFAULT group default qlen 1000
>    link/ether 52:54:00:12:35:01 brd ff:ff:ff:ff:ff:ff
>
>Signed-off-by: David Ahern <dsahern@gmail.com>
>Cc: Jiri Pirko <jiri@resnulli.us>
>Cc: Scott Feldman <sfeldma@gmail.com>

Acked-by: Jiri Pirko <jiri@resnulli.us>


>
>---
> include/linux/if_link.h | 1 +
> ip/ipaddress.c          | 3 +++
> 2 files changed, 4 insertions(+)
>
>diff --git a/include/linux/if_link.h b/include/linux/if_link.h
>index 3450c3fbdc65..c5ee8c91b1c6 100644
>--- a/include/linux/if_link.h
>+++ b/include/linux/if_link.h
>@@ -147,6 +147,7 @@ enum {
> 	IFLA_CARRIER_CHANGES,
> 	IFLA_PHYS_SWITCH_ID,
> 	IFLA_LINK_NETNSID,
>+	IFLA_PHYS_PORT_NAME,
> 	__IFLA_MAX
> };
> 
>diff --git a/ip/ipaddress.c b/ip/ipaddress.c
>index 99a6ab5977e3..9e65015b7a48 100644
>--- a/ip/ipaddress.c
>+++ b/ip/ipaddress.c
>@@ -645,6 +645,9 @@ int print_linkinfo(const struct sockaddr_nl *who,
> 				      b1, sizeof(b1)));
> 	}
> 
>+	if (tb[IFLA_PHYS_PORT_NAME])
>+		fprintf(fp, "port name %s ", rta_getattr_str(tb[IFLA_PHYS_PORT_NAME]));
>+
> 	if (tb[IFLA_OPERSTATE])
> 		print_operstate(fp, rta_getattr_u8(tb[IFLA_OPERSTATE]));
> 
>-- 
>2.2.1
>

Re: [PATCH v2 1/3] net: add support for phys_port_name

[Scott Feldman]

On Mon, Mar 16, 2015 at 8:27 PM, David Ahern <dsahern@gmail.com> wrote:
> Similar to port id allow netdevices to specify port names and export
> the name via sysfs. Drivers can implement the netdevice operation to
> assist udev in having sane default names for the devices using the
> rule:
>
> $ cat /etc/udev/rules.d/80-net-setup-link.rules
> SUBSYSTEM=="net", ACTION=="add", ATTR{phys_port_name}!="",
> NAME="$attr{phys_port_name}"
>
> Use of phys_name versus phys_id was suggested-by Jiri Pirko.
>
> v2:
> - replaced netdev_phys_item_name with buffer and length per Jiri's comment
>
> Signed-off-by: David Ahern <dsahern@gmail.com>
> Cc: Jiri Pirko <jiri@resnulli.us>
> Cc: Scott Feldman <sfeldma@gmail.com>


Acked-by: Scott Feldman <sfeldma@gmail.com>

Re: [PATCH v2 1/3] net: add support for phys_port_name

[Jiri Pirko]

Tue, Mar 17, 2015 at 04:27:15AM CET, dsahern@gmail.com wrote:
>Similar to port id allow netdevices to specify port names and export
>the name via sysfs. Drivers can implement the netdevice operation to
>assist udev in having sane default names for the devices using the
>rule:
>
>$ cat /etc/udev/rules.d/80-net-setup-link.rules
>SUBSYSTEM=="net", ACTION=="add", ATTR{phys_port_name}!="",
>NAME="$attr{phys_port_name}"
>
>Use of phys_name versus phys_id was suggested-by Jiri Pirko.
>
>v2:
>- replaced netdev_phys_item_name with buffer and length per Jiri's comment
>
>Signed-off-by: David Ahern <dsahern@gmail.com>
>Cc: Jiri Pirko <jiri@resnulli.us>
>Cc: Scott Feldman <sfeldma@gmail.com>
>---
> include/linux/netdevice.h    |  4 ++++
> include/uapi/linux/if_link.h |  1 +
> net/core/dev.c               | 18 ++++++++++++++++++
> net/core/net-sysfs.c         | 23 +++++++++++++++++++++++
> net/core/rtnetlink.c         | 21 +++++++++++++++++++++
> 5 files changed, 67 insertions(+)
>
>diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
>index dd1d069758be..d4df818d6606 100644
>--- a/include/linux/netdevice.h
>+++ b/include/linux/netdevice.h
>@@ -1159,6 +1159,8 @@ struct net_device_ops {
> 						      bool new_carrier);
> 	int			(*ndo_get_phys_port_id)(struct net_device *dev,
> 							struct netdev_phys_item_id *ppid);
>+	int			(*ndo_get_phys_port_name)(struct net_device *dev,
>+							  char *buf, int len);

							please change
							this to "char
							*name" and
							"size_t len"

With that changes, feel free to add my
Acked-by: Jiri Pirko <jiri@resnulli.us>

Thanks David for taking care of this.


> 	void			(*ndo_add_vxlan_port)(struct  net_device *dev,
> 						      sa_family_t sa_family,
> 						      __be16 port);
>@@ -2939,6 +2941,8 @@ int dev_set_mac_address(struct net_device *, struct sockaddr *);
> int dev_change_carrier(struct net_device *, bool new_carrier);
> int dev_get_phys_port_id(struct net_device *dev,
> 			 struct netdev_phys_item_id *ppid);
>+int dev_get_phys_port_name(struct net_device *dev,
>+			   char *buf, int len);
> struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev);
> struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
> 				    struct netdev_queue *txq, int *ret);
>diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
>index 756436e1ce89..7158fd00a109 100644
>--- a/include/uapi/linux/if_link.h
>+++ b/include/uapi/linux/if_link.h
>@@ -147,6 +147,7 @@ enum {
> 	IFLA_CARRIER_CHANGES,
> 	IFLA_PHYS_SWITCH_ID,
> 	IFLA_LINK_NETNSID,
>+	IFLA_PHYS_PORT_NAME,
> 	__IFLA_MAX
> };
> 
>diff --git a/net/core/dev.c b/net/core/dev.c
>index 39fe369b46ad..ae2a1ecf33be 100644
>--- a/net/core/dev.c
>+++ b/net/core/dev.c
>@@ -5912,6 +5912,24 @@ int dev_get_phys_port_id(struct net_device *dev,
> EXPORT_SYMBOL(dev_get_phys_port_id);
> 
> /**
>+ *	dev_get_phys_port_name - Get device physical port name
>+ *	@dev: device
>+ *	@name: port name
>+ *
>+ *	Get device physical port name
>+ */
>+int dev_get_phys_port_name(struct net_device *dev,
>+			   char *buf, int len)
>+{
>+	const struct net_device_ops *ops = dev->netdev_ops;
>+
>+	if (!ops->ndo_get_phys_port_name)
>+		return -EOPNOTSUPP;
>+	return ops->ndo_get_phys_port_name(dev, buf, len);
>+}
>+EXPORT_SYMBOL(dev_get_phys_port_name);
>+
>+/**
>  *	dev_new_index	-	allocate an ifindex
>  *	@net: the applicable net namespace
>  *
>diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
>index cf30620a88e1..b2a673870c4b 100644
>--- a/net/core/net-sysfs.c
>+++ b/net/core/net-sysfs.c
>@@ -418,6 +418,28 @@ static ssize_t phys_port_id_show(struct device *dev,
> }
> static DEVICE_ATTR_RO(phys_port_id);
> 
>+static ssize_t phys_port_name_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)) {
>+		char name[IFNAMSIZ];
>+
>+		ret = dev_get_phys_port_name(netdev, name, sizeof(name));
>+		if (!ret)
>+			ret = sprintf(buf, "%s\n", name);
>+	}
>+	rtnl_unlock();
>+
>+	return ret;
>+}
>+static DEVICE_ATTR_RO(phys_port_name);
>+
> static ssize_t phys_switch_id_show(struct device *dev,
> 				   struct device_attribute *attr, char *buf)
> {
>@@ -465,6 +487,7 @@ 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_port_name.attr,
> 	&dev_attr_phys_switch_id.attr,
> 	NULL,
> };
>diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
>index 25b4b5d23485..7227b5695394 100644
>--- a/net/core/rtnetlink.c
>+++ b/net/core/rtnetlink.c
>@@ -982,6 +982,24 @@ static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
> 	return 0;
> }
> 
>+static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
>+{
>+	char buf[IFNAMSIZ];
>+	int err;
>+
>+	err = dev_get_phys_port_name(dev, buf, sizeof(buf));
>+	if (err) {
>+		if (err == -EOPNOTSUPP)
>+			return 0;
>+		return err;
>+	}
>+
>+	if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(buf), buf))
>+		return -EMSGSIZE;
>+
>+	return 0;
>+}
>+
> static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
> {
> 	int err;
>@@ -1072,6 +1090,9 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
> 	if (rtnl_phys_port_id_fill(skb, dev))
> 		goto nla_put_failure;
> 
>+	if (rtnl_phys_port_name_fill(skb, dev))
>+		goto nla_put_failure;
>+
> 	if (rtnl_phys_switch_id_fill(skb, dev))
> 		goto nla_put_failure;
> 
>-- 
>2.2.1
>

[PATCH v4 1/3] net: add support for phys_port_name

[David Ahern]

Similar to port id allow netdevices to specify port names and export
the name via sysfs. Drivers can implement the netdevice operation to
assist udev in having sane default names for the devices using the
rule:

$ cat /etc/udev/rules.d/80-net-setup-link.rules
SUBSYSTEM=="net", ACTION=="add", ATTR{phys_port_name}!="",
NAME="$attr{phys_port_name}"

Use of phys_name versus phys_id was suggested-by Jiri Pirko.

Signed-off-by: David Ahern <dsahern@gmail.com>
Acked-by: Jiri Pirko <jiri@resnulli.us>
Acked-by: Scott Feldman <sfeldma@gmail.com>
---
v4:
- updated documentation per Florian's request

v3:
- changed length from int to size_t, variable name from buf to name per
  Jiri's comment

v2:
- replaced netdev_phys_item_name with buffer and length per Jiri's comment

 Documentation/ABI/testing/sysfs-class-net |  8 ++++++++
 include/linux/netdevice.h                 |  4 ++++
 include/uapi/linux/if_link.h              |  1 +
 net/core/dev.c                            | 18 ++++++++++++++++++
 net/core/net-sysfs.c                      | 23 +++++++++++++++++++++++
 net/core/rtnetlink.c                      | 21 +++++++++++++++++++++
 6 files changed, 75 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-class-net b/Documentation/ABI/testing/sysfs-class-net
index beb8ec4dabbc..5ecfd72ba684 100644
--- a/Documentation/ABI/testing/sysfs-class-net
+++ b/Documentation/ABI/testing/sysfs-class-net
@@ -188,6 +188,14 @@ Contact:	netdev@vger.kernel.org
 		Indicates the interface unique physical port identifier within
 		the NIC, as a string.
 
+What:		/sys/class/net/<iface>/phys_port_name
+Date:		March 2015
+KernelVersion:	4.0
+Contact:	netdev@vger.kernel.org
+Description:
+		Indicates the interface physical port name within the NIC,
+		as a string.
+
 What:		/sys/class/net/<iface>/speed
 Date:		October 2009
 KernelVersion:	2.6.33
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index dd1d069758be..52b519b408e6 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1159,6 +1159,8 @@ struct net_device_ops {
 						      bool new_carrier);
 	int			(*ndo_get_phys_port_id)(struct net_device *dev,
 							struct netdev_phys_item_id *ppid);
+	int			(*ndo_get_phys_port_name)(struct net_device *dev,
+							  char *name, size_t len);
 	void			(*ndo_add_vxlan_port)(struct  net_device *dev,
 						      sa_family_t sa_family,
 						      __be16 port);
@@ -2939,6 +2941,8 @@ int dev_set_mac_address(struct net_device *, struct sockaddr *);
 int dev_change_carrier(struct net_device *, bool new_carrier);
 int dev_get_phys_port_id(struct net_device *dev,
 			 struct netdev_phys_item_id *ppid);
+int dev_get_phys_port_name(struct net_device *dev,
+			   char *name, size_t len);
 struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev);
 struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
 				    struct netdev_queue *txq, int *ret);
diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
index 756436e1ce89..7158fd00a109 100644
--- a/include/uapi/linux/if_link.h
+++ b/include/uapi/linux/if_link.h
@@ -147,6 +147,7 @@ enum {
 	IFLA_CARRIER_CHANGES,
 	IFLA_PHYS_SWITCH_ID,
 	IFLA_LINK_NETNSID,
+	IFLA_PHYS_PORT_NAME,
 	__IFLA_MAX
 };
 
diff --git a/net/core/dev.c b/net/core/dev.c
index 39fe369b46ad..a1f24151db5b 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5912,6 +5912,24 @@ int dev_get_phys_port_id(struct net_device *dev,
 EXPORT_SYMBOL(dev_get_phys_port_id);
 
 /**
+ *	dev_get_phys_port_name - Get device physical port name
+ *	@dev: device
+ *	@name: port name
+ *
+ *	Get device physical port name
+ */
+int dev_get_phys_port_name(struct net_device *dev,
+			   char *name, size_t len)
+{
+	const struct net_device_ops *ops = dev->netdev_ops;
+
+	if (!ops->ndo_get_phys_port_name)
+		return -EOPNOTSUPP;
+	return ops->ndo_get_phys_port_name(dev, name, len);
+}
+EXPORT_SYMBOL(dev_get_phys_port_name);
+
+/**
  *	dev_new_index	-	allocate an ifindex
  *	@net: the applicable net namespace
  *
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index cf30620a88e1..b2a673870c4b 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -418,6 +418,28 @@ static ssize_t phys_port_id_show(struct device *dev,
 }
 static DEVICE_ATTR_RO(phys_port_id);
 
+static ssize_t phys_port_name_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)) {
+		char name[IFNAMSIZ];
+
+		ret = dev_get_phys_port_name(netdev, name, sizeof(name));
+		if (!ret)
+			ret = sprintf(buf, "%s\n", name);
+	}
+	rtnl_unlock();
+
+	return ret;
+}
+static DEVICE_ATTR_RO(phys_port_name);
+
 static ssize_t phys_switch_id_show(struct device *dev,
 				   struct device_attribute *attr, char *buf)
 {
@@ -465,6 +487,7 @@ 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_port_name.attr,
 	&dev_attr_phys_switch_id.attr,
 	NULL,
 };
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 25b4b5d23485..6abe634c666c 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -982,6 +982,24 @@ static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
 	return 0;
 }
 
+static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
+{
+	char name[IFNAMSIZ];
+	int err;
+
+	err = dev_get_phys_port_name(dev, name, sizeof(name));
+	if (err) {
+		if (err == -EOPNOTSUPP)
+			return 0;
+		return err;
+	}
+
+	if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name))
+		return -EMSGSIZE;
+
+	return 0;
+}
+
 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
 {
 	int err;
@@ -1072,6 +1090,9 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
 	if (rtnl_phys_port_id_fill(skb, dev))
 		goto nla_put_failure;
 
+	if (rtnl_phys_port_name_fill(skb, dev))
+		goto nla_put_failure;
+
 	if (rtnl_phys_switch_id_fill(skb, dev))
 		goto nla_put_failure;
 
-- 
2.2.1

[PATCH 3/3] iproute2: Add support for phys_port_name

[David Ahern]

Display phys_port_name attribute if returned:

./ip link show sw1p1
4: sw1p1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop port name sw1p1 state DOWN mode DEFAULT group default qlen 1000
    link/ether 52:54:00:12:35:01 brd ff:ff:ff:ff:ff:ff

Signed-off-by: David Ahern <dsahern@gmail.com>
Acked-by: Jiri Pirko <jiri@resnulli.us>
Cc: Scott Feldman <sfeldma@gmail.com>

---
 include/linux/if_link.h | 1 +
 ip/ipaddress.c          | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/include/linux/if_link.h b/include/linux/if_link.h
index 3450c3fbdc65..c5ee8c91b1c6 100644
--- a/include/linux/if_link.h
+++ b/include/linux/if_link.h
@@ -147,6 +147,7 @@ enum {
 	IFLA_CARRIER_CHANGES,
 	IFLA_PHYS_SWITCH_ID,
 	IFLA_LINK_NETNSID,
+	IFLA_PHYS_PORT_NAME,
 	__IFLA_MAX
 };
 
diff --git a/ip/ipaddress.c b/ip/ipaddress.c
index 99a6ab5977e3..9e65015b7a48 100644
--- a/ip/ipaddress.c
+++ b/ip/ipaddress.c
@@ -645,6 +645,9 @@ int print_linkinfo(const struct sockaddr_nl *who,
 				      b1, sizeof(b1)));
 	}
 
+	if (tb[IFLA_PHYS_PORT_NAME])
+		fprintf(fp, "port name %s ", rta_getattr_str(tb[IFLA_PHYS_PORT_NAME]));
+
 	if (tb[IFLA_OPERSTATE])
 		print_operstate(fp, rta_getattr_u8(tb[IFLA_OPERSTATE]));
 
-- 
2.2.1

[PATCH v3 1/3] net: add support for phys_port_name

[David Ahern]

Similar to port id allow netdevices to specify port names and export
the name via sysfs. Drivers can implement the netdevice operation to
assist udev in having sane default names for the devices using the
rule:

$ cat /etc/udev/rules.d/80-net-setup-link.rules
SUBSYSTEM=="net", ACTION=="add", ATTR{phys_port_name}!="",
NAME="$attr{phys_port_name}"

Use of phys_name versus phys_id was suggested-by Jiri Pirko.

v3:
- changed length from int to size_t, variable name from buf to name per
  Jiri's comment

v2:
- replaced netdev_phys_item_name with buffer and length per Jiri's comment

Signed-off-by: David Ahern <dsahern@gmail.com>
Acked-by: Jiri Pirko <jiri@resnulli.us>
Acked-by: Scott Feldman <sfeldma@gmail.com>
---
 include/linux/netdevice.h    |  4 ++++
 include/uapi/linux/if_link.h |  1 +
 net/core/dev.c               | 18 ++++++++++++++++++
 net/core/net-sysfs.c         | 23 +++++++++++++++++++++++
 net/core/rtnetlink.c         | 21 +++++++++++++++++++++
 5 files changed, 67 insertions(+)

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index dd1d069758be..52b519b408e6 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1159,6 +1159,8 @@ struct net_device_ops {
 						      bool new_carrier);
 	int			(*ndo_get_phys_port_id)(struct net_device *dev,
 							struct netdev_phys_item_id *ppid);
+	int			(*ndo_get_phys_port_name)(struct net_device *dev,
+							  char *name, size_t len);
 	void			(*ndo_add_vxlan_port)(struct  net_device *dev,
 						      sa_family_t sa_family,
 						      __be16 port);
@@ -2939,6 +2941,8 @@ int dev_set_mac_address(struct net_device *, struct sockaddr *);
 int dev_change_carrier(struct net_device *, bool new_carrier);
 int dev_get_phys_port_id(struct net_device *dev,
 			 struct netdev_phys_item_id *ppid);
+int dev_get_phys_port_name(struct net_device *dev,
+			   char *name, size_t len);
 struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev);
 struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
 				    struct netdev_queue *txq, int *ret);
diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
index 756436e1ce89..7158fd00a109 100644
--- a/include/uapi/linux/if_link.h
+++ b/include/uapi/linux/if_link.h
@@ -147,6 +147,7 @@ enum {
 	IFLA_CARRIER_CHANGES,
 	IFLA_PHYS_SWITCH_ID,
 	IFLA_LINK_NETNSID,
+	IFLA_PHYS_PORT_NAME,
 	__IFLA_MAX
 };
 
diff --git a/net/core/dev.c b/net/core/dev.c
index 39fe369b46ad..a1f24151db5b 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5912,6 +5912,24 @@ int dev_get_phys_port_id(struct net_device *dev,
 EXPORT_SYMBOL(dev_get_phys_port_id);
 
 /**
+ *	dev_get_phys_port_name - Get device physical port name
+ *	@dev: device
+ *	@name: port name
+ *
+ *	Get device physical port name
+ */
+int dev_get_phys_port_name(struct net_device *dev,
+			   char *name, size_t len)
+{
+	const struct net_device_ops *ops = dev->netdev_ops;
+
+	if (!ops->ndo_get_phys_port_name)
+		return -EOPNOTSUPP;
+	return ops->ndo_get_phys_port_name(dev, name, len);
+}
+EXPORT_SYMBOL(dev_get_phys_port_name);
+
+/**
  *	dev_new_index	-	allocate an ifindex
  *	@net: the applicable net namespace
  *
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index cf30620a88e1..b2a673870c4b 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -418,6 +418,28 @@ static ssize_t phys_port_id_show(struct device *dev,
 }
 static DEVICE_ATTR_RO(phys_port_id);
 
+static ssize_t phys_port_name_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)) {
+		char name[IFNAMSIZ];
+
+		ret = dev_get_phys_port_name(netdev, name, sizeof(name));
+		if (!ret)
+			ret = sprintf(buf, "%s\n", name);
+	}
+	rtnl_unlock();
+
+	return ret;
+}
+static DEVICE_ATTR_RO(phys_port_name);
+
 static ssize_t phys_switch_id_show(struct device *dev,
 				   struct device_attribute *attr, char *buf)
 {
@@ -465,6 +487,7 @@ 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_port_name.attr,
 	&dev_attr_phys_switch_id.attr,
 	NULL,
 };
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 25b4b5d23485..6abe634c666c 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -982,6 +982,24 @@ static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
 	return 0;
 }
 
+static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
+{
+	char name[IFNAMSIZ];
+	int err;
+
+	err = dev_get_phys_port_name(dev, name, sizeof(name));
+	if (err) {
+		if (err == -EOPNOTSUPP)
+			return 0;
+		return err;
+	}
+
+	if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name))
+		return -EMSGSIZE;
+
+	return 0;
+}
+
 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
 {
 	int err;
@@ -1072,6 +1090,9 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
 	if (rtnl_phys_port_id_fill(skb, dev))
 		goto nla_put_failure;
 
+	if (rtnl_phys_port_name_fill(skb, dev))
+		goto nla_put_failure;
+
 	if (rtnl_phys_switch_id_fill(skb, dev))
 		goto nla_put_failure;
 
-- 
2.2.1

[PATCH 3/3] iproute2: Add support for phys_port_name

[David Ahern]

Display phys_port_name attribute if returned:

./ip link show sw1p1
4: sw1p1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop port name sw1p1 state DOWN mode DEFAULT group default qlen 1000
    link/ether 52:54:00:12:35:01 brd ff:ff:ff:ff:ff:ff

Signed-off-by: David Ahern <dsahern@gmail.com>
Acked-by: Jiri Pirko <jiri@resnulli.us>
Cc: Scott Feldman <sfeldma@gmail.com>

---
 include/linux/if_link.h | 1 +
 ip/ipaddress.c          | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/include/linux/if_link.h b/include/linux/if_link.h
index 3450c3fbdc65..c5ee8c91b1c6 100644
--- a/include/linux/if_link.h
+++ b/include/linux/if_link.h
@@ -147,6 +147,7 @@ enum {
 	IFLA_CARRIER_CHANGES,
 	IFLA_PHYS_SWITCH_ID,
 	IFLA_LINK_NETNSID,
+	IFLA_PHYS_PORT_NAME,
 	__IFLA_MAX
 };
 
diff --git a/ip/ipaddress.c b/ip/ipaddress.c
index 99a6ab5977e3..9e65015b7a48 100644
--- a/ip/ipaddress.c
+++ b/ip/ipaddress.c
@@ -645,6 +645,9 @@ int print_linkinfo(const struct sockaddr_nl *who,
 				      b1, sizeof(b1)));
 	}
 
+	if (tb[IFLA_PHYS_PORT_NAME])
+		fprintf(fp, "port name %s ", rta_getattr_str(tb[IFLA_PHYS_PORT_NAME]));
+
 	if (tb[IFLA_OPERSTATE])
 		print_operstate(fp, rta_getattr_u8(tb[IFLA_OPERSTATE]));
 
-- 
2.2.1

[PATCH 1/3] net: add support for phys_port_name

[David Ahern]

Similar to port id allow netdevices to specify port names and export
the name via sysfs. Drivers can implement the netdevice operation to
assist udev in having sane default names for the devices using the
rule:

$ cat /etc/udev/rules.d/80-net-setup-link.rules
SUBSYSTEM=="net", ACTION=="add", ATTR{phys_port_name}!="",
NAME="$attr{phys_port_name}"

Use of phys_name versus phys_id was suggested-by Jiri Pirko.

Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: Scott Feldman <sfeldma@gmail.com>
---
 include/linux/netdevice.h    | 13 +++++++++++++
 include/uapi/linux/if_link.h |  1 +
 net/core/dev.c               | 18 ++++++++++++++++++
 net/core/net-sysfs.c         | 23 +++++++++++++++++++++++
 net/core/rtnetlink.c         | 21 +++++++++++++++++++++
 5 files changed, 76 insertions(+)

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index dd1d069758be..47a773b9bee0 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -765,6 +765,15 @@ struct netdev_phys_item_id {
 	unsigned char id_len;
 };
 
+#define MAX_PHYS_ITEM_NAME_LEN 32
+
+/* This structure holds a unique name to identify some
+ * physical item (port for example) used by a netdevice.
+ */
+struct netdev_phys_item_name {
+	char str[MAX_PHYS_ITEM_NAME_LEN];
+};
+
 typedef u16 (*select_queue_fallback_t)(struct net_device *dev,
 				       struct sk_buff *skb);
 
@@ -1159,6 +1168,8 @@ struct net_device_ops {
 						      bool new_carrier);
 	int			(*ndo_get_phys_port_id)(struct net_device *dev,
 							struct netdev_phys_item_id *ppid);
+	int			(*ndo_get_phys_port_name)(struct net_device *dev,
+							  struct netdev_phys_item_name *name);
 	void			(*ndo_add_vxlan_port)(struct  net_device *dev,
 						      sa_family_t sa_family,
 						      __be16 port);
@@ -2939,6 +2950,8 @@ int dev_set_mac_address(struct net_device *, struct sockaddr *);
 int dev_change_carrier(struct net_device *, bool new_carrier);
 int dev_get_phys_port_id(struct net_device *dev,
 			 struct netdev_phys_item_id *ppid);
+int dev_get_phys_port_name(struct net_device *dev,
+			   struct netdev_phys_item_name *name);
 struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev);
 struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
 				    struct netdev_queue *txq, int *ret);
diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
index 756436e1ce89..7158fd00a109 100644
--- a/include/uapi/linux/if_link.h
+++ b/include/uapi/linux/if_link.h
@@ -147,6 +147,7 @@ enum {
 	IFLA_CARRIER_CHANGES,
 	IFLA_PHYS_SWITCH_ID,
 	IFLA_LINK_NETNSID,
+	IFLA_PHYS_PORT_NAME,
 	__IFLA_MAX
 };
 
diff --git a/net/core/dev.c b/net/core/dev.c
index 39fe369b46ad..38b04093e4c9 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5912,6 +5912,24 @@ int dev_get_phys_port_id(struct net_device *dev,
 EXPORT_SYMBOL(dev_get_phys_port_id);
 
 /**
+ *	dev_get_phys_port_name - Get device physical port name
+ *	@dev: device
+ *	@name: port name
+ *
+ *	Get device physical port name
+ */
+int dev_get_phys_port_name(struct net_device *dev,
+			   struct netdev_phys_item_name *name)
+{
+	const struct net_device_ops *ops = dev->netdev_ops;
+
+	if (!ops->ndo_get_phys_port_name)
+		return -EOPNOTSUPP;
+	return ops->ndo_get_phys_port_name(dev, name);
+}
+EXPORT_SYMBOL(dev_get_phys_port_name);
+
+/**
  *	dev_new_index	-	allocate an ifindex
  *	@net: the applicable net namespace
  *
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index cf30620a88e1..beecfd499341 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -418,6 +418,28 @@ static ssize_t phys_port_id_show(struct device *dev,
 }
 static DEVICE_ATTR_RO(phys_port_id);
 
+static ssize_t phys_port_name_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_name name;
+
+		ret = dev_get_phys_port_name(netdev, &name);
+		if (!ret)
+			ret = sprintf(buf, "%s\n", name.str);
+	}
+	rtnl_unlock();
+
+	return ret;
+}
+static DEVICE_ATTR_RO(phys_port_name);
+
 static ssize_t phys_switch_id_show(struct device *dev,
 				   struct device_attribute *attr, char *buf)
 {
@@ -465,6 +487,7 @@ 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_port_name.attr,
 	&dev_attr_phys_switch_id.attr,
 	NULL,
 };
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 25b4b5d23485..6f4d17e13db7 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -982,6 +982,24 @@ static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
 	return 0;
 }
 
+static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
+{
+	struct netdev_phys_item_name name;
+	int err;
+
+	err = dev_get_phys_port_name(dev, &name);
+	if (err) {
+		if (err == -EOPNOTSUPP)
+			return 0;
+		return err;
+	}
+
+	if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name.str), name.str))
+		return -EMSGSIZE;
+
+	return 0;
+}
+
 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
 {
 	int err;
@@ -1072,6 +1090,9 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
 	if (rtnl_phys_port_id_fill(skb, dev))
 		goto nla_put_failure;
 
+	if (rtnl_phys_port_name_fill(skb, dev))
+		goto nla_put_failure;
+
 	if (rtnl_phys_switch_id_fill(skb, dev))
 		goto nla_put_failure;
 
-- 
2.2.1

[PATCH 3/3] iproute2: Add support for phys_port_name

[David Ahern]

Display phys_port_name attribute if returned:

./ip link show sw1p1
4: sw1p1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop port name sw1p1 state DOWN mode DEFAULT group default qlen 1000
    link/ether 52:54:00:12:35:01 brd ff:ff:ff:ff:ff:ff

Signed-off-by: David Ahern <dsahern@gmail.com>
---
 include/linux/if_link.h | 1 +
 ip/ipaddress.c          | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/include/linux/if_link.h b/include/linux/if_link.h
index 3450c3fbdc65..c5ee8c91b1c6 100644
--- a/include/linux/if_link.h
+++ b/include/linux/if_link.h
@@ -147,6 +147,7 @@ enum {
 	IFLA_CARRIER_CHANGES,
 	IFLA_PHYS_SWITCH_ID,
 	IFLA_LINK_NETNSID,
+	IFLA_PHYS_PORT_NAME,
 	__IFLA_MAX
 };
 
diff --git a/ip/ipaddress.c b/ip/ipaddress.c
index 99a6ab5977e3..9e65015b7a48 100644
--- a/ip/ipaddress.c
+++ b/ip/ipaddress.c
@@ -645,6 +645,9 @@ int print_linkinfo(const struct sockaddr_nl *who,
 				      b1, sizeof(b1)));
 	}
 
+	if (tb[IFLA_PHYS_PORT_NAME])
+		fprintf(fp, "port name %s ", rta_getattr_str(tb[IFLA_PHYS_PORT_NAME]));
+
 	if (tb[IFLA_OPERSTATE])
 		print_operstate(fp, rta_getattr_u8(tb[IFLA_OPERSTATE]));
 
-- 
2.2.1

Re: [PATCH 3/3] iproute2: Add support for phys_port_name

[Stephen Hemminger]

On Mon, 16 Mar 2015 09:46:58 -0600
David Ahern <dsahern@gmail.com> wrote:

> Display phys_port_name attribute if returned:
> 
> ./ip link show sw1p1
> 4: sw1p1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop port name sw1p1 state DOWN mode DEFAULT group default qlen 1000
>     link/ether 52:54:00:12:35:01 brd ff:ff:ff:ff:ff:ff
> 
> Signed-off-by: David Ahern <dsahern@gmail.com>
> ---
>  include/linux/if_link.h | 1 +
>  ip/ipaddress.c          | 3 +++
>  2 files changed, 4 insertions(+)
> 
> diff --git a/include/linux/if_link.h b/include/linux/if_link.h
> index 3450c3fbdc65..c5ee8c91b1c6 100644
> --- a/include/linux/if_link.h
> +++ b/include/linux/if_link.h
> @@ -147,6 +147,7 @@ enum {
>  	IFLA_CARRIER_CHANGES,
>  	IFLA_PHYS_SWITCH_ID,
>  	IFLA_LINK_NETNSID,
> +	IFLA_PHYS_PORT_NAME,
>  	__IFLA_MAX
>  };
>  
> diff --git a/ip/ipaddress.c b/ip/ipaddress.c
> index 99a6ab5977e3..9e65015b7a48 100644
> --- a/ip/ipaddress.c
> +++ b/ip/ipaddress.c
> @@ -645,6 +645,9 @@ int print_linkinfo(const struct sockaddr_nl *who,
>  				      b1, sizeof(b1)));
>  	}
>  
> +	if (tb[IFLA_PHYS_PORT_NAME])
> +		fprintf(fp, "port name %s ", rta_getattr_str(tb[IFLA_PHYS_PORT_NAME]));
> +
>  	if (tb[IFLA_OPERSTATE])
>  		print_operstate(fp, rta_getattr_u8(tb[IFLA_OPERSTATE]));
>  

In general, this is a good idea, but there are several of issues.
1. There are programs that parse ip route output, therefore all new
   fields need to go at the end.
2. The two word format 'port name' does not match other parts
3. Extra stuff usually goes int 'details' section
4. There are VPN scripts etc that expect all ip commands to
   be invertable. I.e the output of ip link should also be easily
   convertable to input.

Re: [PATCH 3/3] iproute2: Add support for phys_port_name

[David Ahern]

On 3/24/15 4:50 PM, Stephen Hemminger wrote:
>> diff --git a/ip/ipaddress.c b/ip/ipaddress.c
>> index 99a6ab5977e3..9e65015b7a48 100644
>> --- a/ip/ipaddress.c
>> +++ b/ip/ipaddress.c
>> @@ -645,6 +645,9 @@ int print_linkinfo(const struct sockaddr_nl *who,
>>   				      b1, sizeof(b1)));
>>   	}
>>
>> +	if (tb[IFLA_PHYS_PORT_NAME])
>> +		fprintf(fp, "port name %s ", rta_getattr_str(tb[IFLA_PHYS_PORT_NAME]));
>> +
>>   	if (tb[IFLA_OPERSTATE])
>>   		print_operstate(fp, rta_getattr_u8(tb[IFLA_OPERSTATE]));
>>
>
> In general, this is a good idea, but there are several of issues.
> 1. There are programs that parse ip route output, therefore all new
>     fields need to go at the end.
> 2. The two word format 'port name' does not match other parts
> 3. Extra stuff usually goes int 'details' section
> 4. There are VPN scripts etc that expect all ip commands to
>     be invertable. I.e the output of ip link should also be easily
>     convertable to input.

The location of PORT_NAME is right after PORT_ID. I take it from this 
list you want it elsewhere. At the end?

And rather than 'port name' how about 'port-name'? no precedence for 
CamelCase and both 'port' and 'name' are too generic. 'pname' is not 
intuitive. Suggestions?

David