diff options
author | Stefan Hajnoczi <stefanha@redhat.com> | 2013-06-24 17:13:14 +0200 |
---|---|---|
committer | Kevin Wolf <kwolf@redhat.com> | 2013-06-28 09:20:26 +0200 |
commit | 99a9addf567e31244d934376060dd1d34f0f012c (patch) | |
tree | 1881b0286085f50de1699d20f7a440598bd0c9c6 /qmp-commands.hx | |
parent | ac3c5d831aa0ff796659300e186be1a35862dbd3 (diff) | |
download | qemu-99a9addf567e31244d934376060dd1d34f0f012c.zip qemu-99a9addf567e31244d934376060dd1d34f0f012c.tar.gz qemu-99a9addf567e31244d934376060dd1d34f0f012c.tar.bz2 |
block: add drive-backup QMP command
@drive-backup
Start a point-in-time copy of a block device to a new destination. The
status of ongoing drive-backup operations can be checked with
query-block-jobs where the BlockJobInfo.type field has the value 'backup'.
The operation can be stopped before it has completed using the
block-job-cancel command.
@device: the name of the device which should be copied.
@target: the target of the new image. If the file exists, or if it
is a device, the existing file/device will be used as the new
destination. If it does not exist, a new file will be created.
@format: #optional the format of the new destination, default is to
probe if @mode is 'existing', else the format of the source
@mode: #optional whether and how QEMU should create a new image, default is
'absolute-paths'.
@speed: #optional the maximum speed, in bytes per second
@on-source-error: #optional the action to take on an error on the source,
default 'report'. 'stop' and 'enospc' can only be used
if the block device supports io-status (see BlockInfo).
@on-target-error: #optional the action to take on an error on the target,
default 'report' (no limitations, since this applies to
a different block device than @device).
Note that @on-source-error and @on-target-error only affect background I/O.
If an error occurs during a guest write request, the device's rerror/werror
actions will be used.
Returns: nothing on success
If @device is not a valid block device, DeviceNotFound
Since 1.6
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'qmp-commands.hx')
-rw-r--r-- | qmp-commands.hx | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/qmp-commands.hx b/qmp-commands.hx index 8cea5e5..362f0e1 100644 --- a/qmp-commands.hx +++ b/qmp-commands.hx @@ -912,6 +912,52 @@ EQMP }, { + .name = "drive-backup", + .args_type = "device:B,target:s,speed:i?,mode:s?,format:s?," + "on-source-error:s?,on-target-error:s?", + .mhandler.cmd_new = qmp_marshal_input_drive_backup, + }, + +SQMP +drive-backup +------------ + +Start a point-in-time copy of a block device to a new destination. The +status of ongoing drive-backup operations can be checked with +query-block-jobs where the BlockJobInfo.type field has the value 'backup'. +The operation can be stopped before it has completed using the +block-job-cancel command. + +Arguments: + +- "device": the name of the device which should be copied. + (json-string) +- "target": the target of the new image. If the file exists, or if it is a + device, the existing file/device will be used as the new + destination. If it does not exist, a new file will be created. + (json-string) +- "format": the format of the new destination, default is to probe if 'mode' is + 'existing', else the format of the source + (json-string, optional) +- "mode": whether and how QEMU should create a new image + (NewImageMode, optional, default 'absolute-paths') +- "speed": the maximum speed, in bytes per second (json-int, optional) +- "on-source-error": the action to take on an error on the source, default + 'report'. 'stop' and 'enospc' can only be used + if the block device supports io-status. + (BlockdevOnError, optional) +- "on-target-error": the action to take on an error on the target, default + 'report' (no limitations, since this applies to + a different block device than device). + (BlockdevOnError, optional) + +Example: +-> { "execute": "drive-backup", "arguments": { "device": "drive0", + "target": "backup.img" } } +<- { "return": {} } +EQMP + + { .name = "block-job-set-speed", .args_type = "device:B,speed:o", .mhandler.cmd_new = qmp_marshal_input_block_job_set_speed, |