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authorFam Zheng <famz@redhat.com>2014-12-18 18:37:05 +0800
committerStefan Hajnoczi <stefanha@redhat.com>2015-01-13 11:47:56 +0000
commitc29c1dd312f39ec18a3c6177c6da09a75e095d70 (patch)
tree8be81941bacdac122ab360b1f6c9486add1e8ef9 /qmp-commands.hx
parentb7b9d39a7a5bd3a7fe5968b7780c9868c3210a4d (diff)
qmp: Add command 'blockdev-backup'
Similar to drive-backup, but this command uses a device id as target instead of creating/opening an image file. Also add blocker on target bs, since the target is also a named device now. Add check and report error for bs == target which became possible but is an illegal case with introduction of blockdev-backup. Signed-off-by: Fam Zheng <famz@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Message-id: 1418899027-8445-3-git-send-email-famz@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'qmp-commands.hx')
-rw-r--r--qmp-commands.hx42
1 files changed, 42 insertions, 0 deletions
diff --git a/qmp-commands.hx b/qmp-commands.hx
index 6945d30198..8957201f73 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -1094,6 +1094,48 @@ Example:
"sync": "full",
"target": "backup.img" } }
<- { "return": {} }
+
+EQMP
+
+ {
+ .name = "blockdev-backup",
+ .args_type = "sync:s,device:B,target:B,speed:i?,"
+ "on-source-error:s?,on-target-error:s?",
+ .mhandler.cmd_new = qmp_marshal_input_blockdev_backup,
+ },
+
+SQMP
+blockdev-backup
+---------------
+
+The device version of drive-backup: this command takes an existing named device
+as backup target.
+
+Arguments:
+
+- "device": the name of the device which should be copied.
+ (json-string)
+- "target": the name of the backup target device. (json-string)
+- "sync": what parts of the disk image should be copied to the destination;
+ possibilities include "full" for all the disk, "top" for only the
+ sectors allocated in the topmost image, or "none" to only replicate
+ new I/O (MirrorSyncMode).
+- "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": "blockdev-backup", "arguments": { "device": "src-id",
+ "sync": "full",
+ "target": "tgt-id" } }
+<- { "return": {} }
+
EQMP
{