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switchdev: Use switch ID in suggested udev rule
Since there can be multiple switch ASICs on the same system we should use the switch ID in order to differentiate between them and set the switch name (e.g. swX) accordingly. Also, replace the order of the "Switch ID" and "Port Netdev Naming" sections following the above change. Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -89,6 +89,18 @@ Typically, the management port is not participating in offloaded data plane and
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is loaded with a different driver, such as a NIC driver, on the management port
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device.
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Switch ID
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^^^^^^^^^
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The switchdev driver must implement the switchdev op switchdev_port_attr_get
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for SWITCHDEV_ATTR_ID_PORT_PARENT_ID for each port netdev, returning the same
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physical ID for each port of a switch. The ID must be unique between switches
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on the same system. The ID does not need to be unique between switches on
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different systems.
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The switch ID is used to locate ports on a switch and to know if aggregated
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ports belong to the same switch.
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Port Netdev Naming
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^^^^^^^^^^^^^^^^^^
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@ -104,25 +116,13 @@ external configuration. For example, if a physical 40G port is split logically
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into 4 10G ports, resulting in 4 port netdevs, the device can give a unique
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name for each port using port PHYS name. The udev rule would be:
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SUBSYSTEM=="net", ACTION=="add", DRIVER="<driver>", ATTR{phys_port_name}!="", \
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NAME="$attr{phys_port_name}"
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SUBSYSTEM=="net", ACTION=="add", ATTR{phys_switch_id}=="<phys_switch_id>", \
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ATTR{phys_port_name}!="", NAME="swX$attr{phys_port_name}"
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Suggested naming convention is "swXpYsZ", where X is the switch name or ID, Y
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is the port name or ID, and Z is the sub-port name or ID. For example, sw1p1s0
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would be sub-port 0 on port 1 on switch 1.
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Switch ID
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^^^^^^^^^
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The switchdev driver must implement the switchdev op switchdev_port_attr_get
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for SWITCHDEV_ATTR_ID_PORT_PARENT_ID for each port netdev, returning the same
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physical ID for each port of a switch. The ID must be unique between switches
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on the same system. The ID does not need to be unique between switches on
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different systems.
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The switch ID is used to locate ports on a switch and to know if aggregated
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ports belong to the same switch.
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Port Features
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^^^^^^^^^^^^^
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