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-rw-r--r--qmp-commands.hx10
1 files changed, 9 insertions, 1 deletions
diff --git a/qmp-commands.hx b/qmp-commands.hx
index f0f7d2b395..f58a8411ea 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -1004,7 +1004,8 @@ EQMP
{
.name = "drive-mirror",
.args_type = "sync:s,device:B,target:s,speed:i?,mode:s?,format:s?,"
- "on-source-error:s?,on-target-error:s?",
+ "on-source-error:s?,on-target-error:s?,"
+ "granularity:i?,buf-size:i?",
.mhandler.cmd_new = qmp_marshal_input_drive_mirror,
},
@@ -1028,6 +1029,9 @@ Arguments:
file/device (NewImageMode, optional, default 'absolute-paths')
- "speed": maximum speed of the streaming job, in bytes per second
(json-int)
+- "granularity": granularity of the dirty bitmap, in bytes (json-int, optional)
+- "buf_size": maximum amount of data in flight from source to target, in bytes
+ (json-int, default 10M)
- "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
@@ -1037,6 +1041,10 @@ Arguments:
- "on-target-error": the action to take on an error on the target
(BlockdevOnError, default 'report')
+The default value of the granularity is the image cluster size clamped
+between 4096 and 65536, if the image format defines one. If the format
+does not define a cluster size, the default value of the granularity
+is 65536.
Example: