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-rw-r--r--qapi/block-core.json9
1 files changed, 6 insertions, 3 deletions
diff --git a/qapi/block-core.json b/qapi/block-core.json
index d32ec95666..0e29abf099 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -1148,7 +1148,12 @@
# @device: The job identifier. Originally the device name but other
# values are allowed since QEMU 2.7
#
-# @len: the maximum progress value
+# @len: Estimated @offset value at the completion of the job. This value can
+# arbitrarily change while the job is running, in both directions.
+#
+# @offset: Progress made until now. The unit is arbitrary and the value can
+# only meaningfully be used for the ratio of @offset to @len. The
+# value is monotonically increasing.
#
# @busy: false if the job is known to be in a quiescent state, with
# no pending I/O. Since 1.3.
@@ -1156,8 +1161,6 @@
# @paused: whether the job is paused or, if @busy is true, will
# pause itself as soon as possible. Since 1.3.
#
-# @offset: the current progress value
-#
# @speed: the rate limit, bytes per second
#
# @io-status: the status of the job (since 1.3)