1What: /sys/bus/xen-backend/devices/*/devtype 2Date: Feb 2009 3KernelVersion: 2.6.38 4Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> 5Description: 6 The type of the device. e.g., one of: 'vbd' (block), 7 'vif' (network), or 'vfb' (framebuffer). 8 9What: /sys/bus/xen-backend/devices/*/nodename 10Date: Feb 2009 11KernelVersion: 2.6.38 12Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> 13Description: 14 XenStore node (under /local/domain/NNN/) for this 15 backend device. 16 17What: /sys/bus/xen-backend/devices/vbd-*/physical_device 18Date: April 2011 19KernelVersion: 3.0 20Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> 21Description: 22 The major:minor number (in hexidecimal) of the 23 physical device providing the storage for this backend 24 block device. 25 26What: /sys/bus/xen-backend/devices/vbd-*/mode 27Date: April 2011 28KernelVersion: 3.0 29Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> 30Description: 31 Whether the block device is read-only ('r') or 32 read-write ('w'). 33 34What: /sys/bus/xen-backend/devices/vbd-*/statistics/f_req 35Date: April 2011 36KernelVersion: 3.0 37Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> 38Description: 39 Number of flush requests from the frontend. 40 41What: /sys/bus/xen-backend/devices/vbd-*/statistics/oo_req 42Date: April 2011 43KernelVersion: 3.0 44Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> 45Description: 46 Number of requests delayed because the backend was too 47 busy processing previous requests. 48 49What: /sys/bus/xen-backend/devices/vbd-*/statistics/rd_req 50Date: April 2011 51KernelVersion: 3.0 52Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> 53Description: 54 Number of read requests from the frontend. 55 56What: /sys/bus/xen-backend/devices/vbd-*/statistics/rd_sect 57Date: April 2011 58KernelVersion: 3.0 59Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> 60Description: 61 Number of sectors read by the frontend. 62 63What: /sys/bus/xen-backend/devices/vbd-*/statistics/wr_req 64Date: April 2011 65KernelVersion: 3.0 66Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> 67Description: 68 Number of write requests from the frontend. 69 70What: /sys/bus/xen-backend/devices/vbd-*/statistics/wr_sect 71Date: April 2011 72KernelVersion: 3.0 73Contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> 74Description: 75 Number of sectors written by the frontend. 76 77What: /sys/bus/xen-backend/devices/*/state 78Date: August 2018 79KernelVersion: 4.19 80Contact: Joe Jin <joe.jin@oracle.com> 81Description: 82 The state of the device. One of: 'Unknown', 83 'Initialising', 'Initialised', 'Connected', 'Closing', 84 'Closed', 'Reconfiguring', 'Reconfigured'. 85