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DOC: Usage guide for Virtio-blk blkrescan feature

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This patch adds the steps required to use the newly
introduced blkrescan feature for Virtio-blk device.

Tracked-On: #3051
Signed-off-by: Vijay Dhanraj <vijay.dhanraj@intel.com>
This commit is contained in:
Vijay Dhanraj
2019-05-02 11:47:37 -07:00
committed by wenlingz
parent 71b56e0eed
commit b1f61669fc
2 changed files with 51 additions and 0 deletions
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22
tools/acrn-manager/README.rst
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@@ -32,6 +32,7 @@ You can see the available ``acrnctl`` commands by running:
suspend
resume
reset
blkrescan
Use acrnctl [cmd] help for details
Here are some usage examples:
@@ -93,6 +94,27 @@ Use the ``stop`` command to stop one or more running VM:
# acrnctl stop vm-yocto vm1-14:59:30 vm-android
RESCAN BLOCK DEVICE
===================
Use the ``blkrescan`` command to trigger a rescan of
virtio-blk device by guest VM, in order to revalidate and
update the backend file.
.. code-block:: none
# acrnctl blkrescan vmname slot,newfilepath
vmname: Name of VM with dummy backend file attached to virtio-blk device.
slot: Slot number of the virtio-blk device.
newfilepath: File path for the backend of virtio-blk device.
acrnctl blkrescan vm1 6,actual_file.img
.. note:: blkrescan is only supported when VM is launched with
empty backend file (using **nodisk**) for virtio-blk device.
Replacing a valid backend file is not supported and will
result in error.
.. _acrnd:
acrnd