From de90930a0c45760e7523138fac57ff07312bf51d Mon Sep 17 00:00:00 2001 From: Stefan Hajnoczi Date: Wed, 26 Jun 2013 14:11:58 +0200 Subject: block: add drive_backup HMP command Make "drive_backup" available on the HMP monitor: drive_backup [-n] [-f] device target [format] The -n flag requests QEMU to reuse the image found in new-image-file, instead of recreating it from scratch. The -f flag requests QEMU to copy the whole disk, so that the result does not need a backing file. Note that this flag *must* currently be passed since the other sync modes ('none' and 'top') have not been implemented yet. Requiring it ensures that "drive_backup" behaves like "drive_mirror". Signed-off-by: Stefan Hajnoczi Reviewed-by: Eric Blake Signed-off-by: Kevin Wolf --- hmp-commands.hx | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'hmp-commands.hx') diff --git a/hmp-commands.hx b/hmp-commands.hx index d1cdcfb71b..8c6b91a9c7 100644 --- a/hmp-commands.hx +++ b/hmp-commands.hx @@ -1056,6 +1056,26 @@ STEXI @findex drive_mirror Start mirroring a block device's writes to a new destination, using the specified target. +ETEXI + + { + .name = "drive_backup", + .args_type = "reuse:-n,full:-f,device:B,target:s,format:s?", + .params = "[-n] [-f] device target [format]", + .help = "initiates a point-in-time\n\t\t\t" + "copy for a device. The device's contents are\n\t\t\t" + "copied to the new image file, excluding data that\n\t\t\t" + "is written after the command is started.\n\t\t\t" + "The -n flag requests QEMU to reuse the image found\n\t\t\t" + "in new-image-file, instead of recreating it from scratch.\n\t\t\t" + "The -f flag requests QEMU to copy the whole disk,\n\t\t\t" + "so that the result does not need a backing file.\n\t\t\t", + .mhandler.cmd = hmp_drive_backup, + }, +STEXI +@item drive_backup +@findex drive_backup +Start a point-in-time copy of a block device to a specificed target. ETEXI { -- cgit v1.2.1