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authorChristoph Hellwig <hch@lst.de>2011-01-24 13:32:33 +0100
committerKevin Wolf <kwolf@redhat.com>2011-01-31 10:03:00 +0100
commit6d4a2b3a47959f02e7f307f50396e70e8464f95e (patch)
tree6be8245970b9b4b505bfc2b9cc5cb260dfd85834 /block.h
parent2be22ca5a8dd96c68ef0e90fd916aa6555ae915b (diff)
block: add block_resize monitor command
Add a monitor command that allows resizing of block devices while qemu is running. It uses the existing bdrv_truncate method already used by qemu-img to do it's work. Compared to qemu-img the size parsing is very simplicistic, but I think having a properly numering object is more useful for non-humand monitor users than having the units and relative resize parsing. For SCSI devices the new size can be updated in Linux guests by doing the following shell command: echo > /sys/class/scsi_device/0:0:0:0/device/rescan For ATA devices I don't know of a way to update the block device size in Linux system, and for virtio-blk the next two patches will provide an automatic update of the size when this command is issued on the host. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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