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authorKevin Wolf <kwolf@redhat.com>2018-05-16 13:04:34 +0200
committerKevin Wolf <kwolf@redhat.com>2018-05-23 14:30:49 +0200
commita81e0a825e3b89039a427bca037112f461b95fec (patch)
treef88eae8b8af2e37b4a9a3f9ee51fe54d6815879f
parentcd44d96be90e7767c6fb8f33b90939eb58814956 (diff)
blockjob: Improve BlockJobInfo.offset/len documentation
Clarify that len is just an estimation of the end value of offset, and that offset increases monotonically while len can change arbitrarily. While touching the documentation of offset, move it directly after len to match the order of the declaration below. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com>
-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)