Documentation/ABI/stable/sysfs-bus-xen-backend

Source file repositories/reference/linux-study-clean/Documentation/ABI/stable/sysfs-bus-xen-backend

File Facts

System
Linux kernel
Corpus path
Documentation/ABI/stable/sysfs-bus-xen-backend
Extension
[no extension]
Size
2857 bytes
Lines
85
Domain
Support Tooling And Documentation
Bucket
Documentation
Inferred role
Support Tooling And Documentation: Documentation
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

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 hexadecimal) 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

Annotation

Implementation Notes