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linux-yocto/Documentation/ABI/stable/sysfs-bus-xen-backend
David Vrabel c267e6e0c8 xen: document backend sysfs files 
Add ABI documentation for the /sys/bus/xen-backend sysfs files,
including those specific to blkback devices.

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-11-11 15:37:29 -05:00

2.5 KiB
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What: /sys/bus/xen-backend/devices/*/devtype Date: Feb 2009 KernelVersion: 2.6.38 Contact: Konrad Rzeszutek Wilk konrad.wilk@oracle.com Description: The type of the device. e.g., one of: 'vbd' (block), 'vif' (network), or 'vfb' (framebuffer).

What: /sys/bus/xen-backend/devices/*/nodename Date: Feb 2009 KernelVersion: 2.6.38 Contact: Konrad Rzeszutek Wilk konrad.wilk@oracle.com Description: XenStore node (under /local/domain/NNN/) for this backend device.

What: /sys/bus/xen-backend/devices/vbd-*/physical_device Date: April 2011 KernelVersion: 3.0 Contact: Konrad Rzeszutek Wilk konrad.wilk@oracle.com Description: The major:minor number (in hexidecimal) of the physical device providing the storage for this backend block device.

What: /sys/bus/xen-backend/devices/vbd-*/mode Date: April 2011 KernelVersion: 3.0 Contact: Konrad Rzeszutek Wilk konrad.wilk@oracle.com Description: Whether the block device is read-only ('r') or read-write ('w').

What: /sys/bus/xen-backend/devices/vbd-*/statistics/f_req Date: April 2011 KernelVersion: 3.0 Contact: Konrad Rzeszutek Wilk konrad.wilk@oracle.com Description: Number of flush requests from the frontend.

What: /sys/bus/xen-backend/devices/vbd-*/statistics/oo_req Date: April 2011 KernelVersion: 3.0 Contact: Konrad Rzeszutek Wilk konrad.wilk@oracle.com Description: Number of requests delayed because the backend was too busy processing previous requests.

What: /sys/bus/xen-backend/devices/vbd-*/statistics/rd_req Date: April 2011 KernelVersion: 3.0 Contact: Konrad Rzeszutek Wilk konrad.wilk@oracle.com Description: Number of read requests from the frontend.

What: /sys/bus/xen-backend/devices/vbd-*/statistics/rd_sect Date: April 2011 KernelVersion: 3.0 Contact: Konrad Rzeszutek Wilk konrad.wilk@oracle.com Description: Number of sectors read by the frontend.

What: /sys/bus/xen-backend/devices/vbd-*/statistics/wr_req Date: April 2011 KernelVersion: 3.0 Contact: Konrad Rzeszutek Wilk konrad.wilk@oracle.com Description: Number of write requests from the frontend.

What: /sys/bus/xen-backend/devices/vbd-*/statistics/wr_sect Date: April 2011 KernelVersion: 3.0 Contact: Konrad Rzeszutek Wilk konrad.wilk@oracle.com Description: Number of sectors written by the frontend.