0001 What: /sys/bus/xen-backend/devices/*/devtype
0002 Date: Feb 2009
0003 KernelVersion: 2.6.38
0004 Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
0005 Description:
0006 The type of the device. e.g., one of: 'vbd' (block),
0007 'vif' (network), or 'vfb' (framebuffer).
0008
0009 What: /sys/bus/xen-backend/devices/*/nodename
0010 Date: Feb 2009
0011 KernelVersion: 2.6.38
0012 Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
0013 Description:
0014 XenStore node (under /local/domain/NNN/) for this
0015 backend device.
0016
0017 What: /sys/bus/xen-backend/devices/vbd-*/physical_device
0018 Date: April 2011
0019 KernelVersion: 3.0
0020 Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
0021 Description:
0022 The major:minor number (in hexadecimal) of the
0023 physical device providing the storage for this backend
0024 block device.
0025
0026 What: /sys/bus/xen-backend/devices/vbd-*/mode
0027 Date: April 2011
0028 KernelVersion: 3.0
0029 Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
0030 Description:
0031 Whether the block device is read-only ('r') or
0032 read-write ('w').
0033
0034 What: /sys/bus/xen-backend/devices/vbd-*/statistics/f_req
0035 Date: April 2011
0036 KernelVersion: 3.0
0037 Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
0038 Description:
0039 Number of flush requests from the frontend.
0040
0041 What: /sys/bus/xen-backend/devices/vbd-*/statistics/oo_req
0042 Date: April 2011
0043 KernelVersion: 3.0
0044 Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
0045 Description:
0046 Number of requests delayed because the backend was too
0047 busy processing previous requests.
0048
0049 What: /sys/bus/xen-backend/devices/vbd-*/statistics/rd_req
0050 Date: April 2011
0051 KernelVersion: 3.0
0052 Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
0053 Description:
0054 Number of read requests from the frontend.
0055
0056 What: /sys/bus/xen-backend/devices/vbd-*/statistics/rd_sect
0057 Date: April 2011
0058 KernelVersion: 3.0
0059 Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
0060 Description:
0061 Number of sectors read by the frontend.
0062
0063 What: /sys/bus/xen-backend/devices/vbd-*/statistics/wr_req
0064 Date: April 2011
0065 KernelVersion: 3.0
0066 Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
0067 Description:
0068 Number of write requests from the frontend.
0069
0070 What: /sys/bus/xen-backend/devices/vbd-*/statistics/wr_sect
0071 Date: April 2011
0072 KernelVersion: 3.0
0073 Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
0074 Description:
0075 Number of sectors written by the frontend.
0076
0077 What: /sys/bus/xen-backend/devices/*/state
0078 Date: August 2018
0079 KernelVersion: 4.19
0080 Contact: Joe Jin <joe.jin@oracle.com>
0081 Description:
0082 The state of the device. One of: 'Unknown',
0083 'Initialising', 'Initialised', 'Connected', 'Closing',
0084 'Closed', 'Reconfiguring', 'Reconfigured'.
