1What: /sys/bus/fcoe/ 2Date: August 2012 3KernelVersion: TBD 4Contact: Robert Love <robert.w.love@intel.com>, devel@open-fcoe.org 5Description: The FCoE bus. Attributes in this directory are control interfaces. 6 7Attributes: 8 9 ctlr_create: 10 'FCoE Controller' instance creation interface. Writing an 11 <ifname> to this file will allocate and populate sysfs with a 12 fcoe_ctlr_device (ctlr_X). The user can then configure any 13 per-port settings and finally write to the fcoe_ctlr_device's 14 'start' attribute to begin the kernel's discovery and login 15 process. 16 17 ctlr_destroy: 18 'FCoE Controller' instance removal interface. Writing a 19 fcoe_ctlr_device's sysfs name to this file will log the 20 fcoe_ctlr_device out of the fabric or otherwise connected 21 FCoE devices. It will also free all kernel memory allocated 22 for this fcoe_ctlr_device and any structures associated 23 with it, this includes the scsi_host. 24 25What: /sys/bus/fcoe/devices/ctlr_X 26Date: March 2012 27KernelVersion: TBD 28Contact: Robert Love <robert.w.love@intel.com>, devel@open-fcoe.org 29Description: 'FCoE Controller' instances on the fcoe bus. 30 The FCoE Controller now has a three stage creation process. 31 1) Write interface name to ctlr_create 2) Configure the FCoE 32 Controller (ctlr_X) 3) Enable the FCoE Controller to begin 33 discovery and login. The FCoE Controller is destroyed by 34 writing its name, i.e. ctlr_X to the ctlr_delete file. 35 36Attributes: 37 38 fcf_dev_loss_tmo: 39 Device loss timeout period (see below). Changing 40 this value will change the dev_loss_tmo for all 41 FCFs discovered by this controller. 42 43 mode: 44 Display or change the FCoE Controller's mode. Possible 45 modes are 'Fabric' and 'VN2VN'. If a FCoE Controller 46 is started in 'Fabric' mode then FIP FCF discovery is 47 initiated and ultimately a fabric login is attempted. 48 If a FCoE Controller is started in 'VN2VN' mode then 49 FIP VN2VN discovery and login is performed. A FCoE 50 Controller only supports one mode at a time. 51 52 enabled: 53 Whether an FCoE controller is enabled or disabled. 54 0 if disabled, 1 if enabled. Writing either 0 or 1 55 to this file will enable or disable the FCoE controller. 56 57 lesb/link_fail: 58 Link Error Status Block (LESB) link failure count. 59 60 lesb/vlink_fail: 61 Link Error Status Block (LESB) virtual link 62 failure count. 63 64 lesb/miss_fka: 65 Link Error Status Block (LESB) missed FCoE 66 Initialization Protocol (FIP) Keep-Alives (FKA). 67 68 lesb/symb_err: 69 Link Error Status Block (LESB) symbolic error count. 70 71 lesb/err_block: 72 Link Error Status Block (LESB) block error count. 73 74 lesb/fcs_error: 75 Link Error Status Block (LESB) Fibre Channel 76 Services error count. 77 78Notes: ctlr_X (global increment starting at 0) 79 80What: /sys/bus/fcoe/devices/fcf_X 81Date: March 2012 82KernelVersion: TBD 83Contact: Robert Love <robert.w.love@intel.com>, devel@open-fcoe.org 84Description: 'FCoE FCF' instances on the fcoe bus. A FCF is a Fibre Channel 85 Forwarder, which is a FCoE switch that can accept FCoE 86 (Ethernet) packets, unpack them, and forward the embedded 87 Fibre Channel frames into a FC fabric. It can also take 88 outbound FC frames and pack them in Ethernet packets to 89 be sent to their destination on the Ethernet segment. 90 91Attributes: 92 93 fabric_name: 94 Identifies the fabric that the FCF services. 95 96 switch_name: 97 Identifies the FCF. 98 99 priority: 100 The switch's priority amongst other FCFs on the same 101 fabric. 102 103 selected: 104 1 indicates that the switch has been selected for use; 105 0 indicates that the switch will not be used. 106 107 fc_map: 108 The Fibre Channel MAP 109 110 vfid: 111 The Virtual Fabric ID 112 113 mac: 114 The FCF's MAC address 115 116 fka_period: 117 The FIP Keep-Alive period 118 119 fabric_state: The internal kernel state 120 121 - "Unknown" - Initialization value 122 - "Disconnected" - No link to the FCF/fabric 123 - "Connected" - Host is connected to the FCF 124 - "Deleted" - FCF is being removed from the system 125 126 dev_loss_tmo: The device loss timeout period for this FCF. 127 128Notes: A device loss infrastructure similar to the FC Transport's 129 is present in fcoe_sysfs. It is nice to have so that a 130 link flapping adapter doesn't continually advance the count 131 used to identify the discovered FCF. FCFs will exist in a 132 "Disconnected" state until either the timer expires and the 133 FCF becomes "Deleted" or the FCF is rediscovered and becomes 134 "Connected." 135 136 137Users: The first user of this interface will be the fcoeadm application, 138 which is commonly packaged in the fcoe-utils package. 139