|author||Stefan Hajnoczi <email@example.com>||2013-06-26 14:11:58 +0200|
|committer||Kevin Wolf <firstname.lastname@example.org>||2013-07-15 09:49:00 +0200|
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 <email@example.com> Reviewed-by: Eric Blake <firstname.lastname@example.org> Signed-off-by: Kevin Wolf <email@example.com>
Diffstat (limited to 'hmp-commands.hx')
1 files changed, 20 insertions, 0 deletions
diff --git a/hmp-commands.hx b/hmp-commands.hx
index d1cdcfb71b..8c6b91a9c7 100644
@@ -1059,6 +1059,26 @@ using the specified target.
+ .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,
+Start a point-in-time copy of a block device to a specificed target.
.name = "drive_add",
.args_type = "pci_addr:s,opts:s",
.params = "[[<domain>:]<bus>:]<slot>\n"