What: /sys/bus/fcoe/ Date: August 2012 KernelVersion: TBD Contact: Robert Love , devel@open-fcoe.org Description: The FCoE bus. Attributes in this directory are control interfaces. Attributes: ctlr_create: 'FCoE Controller' instance creation interface. Writing an to this file will allocate and populate sysfs with a fcoe_ctlr_device (ctlr_X). The user can then configure any per-port settings and finally write to the fcoe_ctlr_device's 'start' attribute to begin the kernel's discovery and login process. ctlr_destroy: 'FCoE Controller' instance removal interface. Writing a fcoe_ctlr_device's sysfs name to this file will log the fcoe_ctlr_device out of the fabric or otherwise connected FCoE devices. It will also free all kernel memory allocated for this fcoe_ctlr_device and any structures associated with it, this includes the scsi_host. What: /sys/bus/fcoe/devices/ctlr_X Date: March 2012 KernelVersion: TBD Contact: Robert Love , devel@open-fcoe.org Description: 'FCoE Controller' instances on the fcoe bus. The FCoE Controller now has a three stage creation process. 1) Write interface name to ctlr_create 2) Configure the FCoE Controller (ctlr_X) 3) Enable the FCoE Controller to begin discovery and login. The FCoE Controller is destroyed by writing its name, i.e. ctlr_X to the ctlr_delete file. Attributes: fcf_dev_loss_tmo: Device loss timeout period (see below). Changing this value will change the dev_loss_tmo for all FCFs discovered by this controller. mode: Display or change the FCoE Controller's mode. Possible modes are 'Fabric' and 'VN2VN'. If a FCoE Controller is started in 'Fabric' mode then FIP FCF discovery is initiated and ultimately a fabric login is attempted. If a FCoE Controller is started in 'VN2VN' mode then FIP VN2VN discovery and login is performed. A FCoE Controller only supports one mode at a time. enabled: Whether an FCoE controller is enabled or disabled. 0 if disabled, 1 if enabled. Writing either 0 or 1 to this file will enable or disable the FCoE controller. lesb/link_fail: Link Error Status Block (LESB) link failure count. lesb/vlink_fail: Link Error Status Block (LESB) virtual link failure count. lesb/miss_fka: Link Error Status Block (LESB) missed FCoE Initialization Protocol (FIP) Keep-Alives (FKA). lesb/symb_err: Link Error Status Block (LESB) symbolic error count. lesb/err_block: Link Error Status Block (LESB) block error count. lesb/fcs_error: Link Error Status Block (LESB) Fibre Channel Services error count. Notes: ctlr_X (global increment starting at 0) What: /sys/bus/fcoe/devices/fcf_X Date: March 2012 KernelVersion: TBD Contact: Robert Love , devel@open-fcoe.org Description: 'FCoE FCF' instances on the fcoe bus. A FCF is a Fibre Channel Forwarder, which is a FCoE switch that can accept FCoE (Ethernet) packets, unpack them, and forward the embedded Fibre Channel frames into a FC fabric. It can also take outbound FC frames and pack them in Ethernet packets to be sent to their destination on the Ethernet segment. Attributes: fabric_name: Identifies the fabric that the FCF services. switch_name: Identifies the FCF. priority: The switch's priority amongst other FCFs on the same fabric. selected: 1 indicates that the switch has been selected for use; 0 indicates that the switch will not be used. fc_map: The Fibre Channel MAP vfid: The Virtual Fabric ID mac: The FCF's MAC address fka_period: The FIP Keep-Alive period fabric_state: The internal kernel state - "Unknown" - Initialization value - "Disconnected" - No link to the FCF/fabric - "Connected" - Host is connected to the FCF - "Deleted" - FCF is being removed from the system dev_loss_tmo: The device loss timeout period for this FCF. Notes: A device loss infrastructure similar to the FC Transport's is present in fcoe_sysfs. It is nice to have so that a link flapping adapter doesn't continually advance the count used to identify the discovered FCF. FCFs will exist in a "Disconnected" state until either the timer expires and the FCF becomes "Deleted" or the FCF is rediscovered and becomes "Connected." Users: The first user of this interface will be the fcoeadm application, which is commonly packaged in the fcoe-utils package.