Issuing a drive-backup from qmp_drive_backup takes a slightly
different path than when it's issued from a transaction. In the code,
this is manifested as some redundancy between do_drive_backup() and
drive_backup_prepare().
This change unifies both paths, merging do_drive_backup() and
drive_backup_prepare(), and changing qmp_drive_backup() to create a
transaction instead of calling do_backup_common() direcly.
As a side-effect, now qmp_drive_backup() is executed inside a drained
section, as it happens when creating a drive-backup transaction. This
change is visible from the user's perspective, as the job gets paused
and immediately resumed before starting the actual work.
Also fix tests 141, 185 and 219 to cope with the extra
JOB_STATUS_CHANGE lines.
Signed-off-by: Sergio Lopez <slp@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
In 219, we wait for the job to make progress before we emit its status.
This makes the output reliable. We do not wait for any more progress if
the job's current-progress already matches its total-progress.
Unfortunately, there is a bug: Right after the job has been started,
it's possible that total-progress is still 0. In that case, we may skip
the first progress-making step and keep ending up 64 kB short.
To fix that bug, we can simply wait for total-progress to reach 4 MB
(the image size) after starting the job.
Reported-by: Karen Mezick <kmezick@redhat.com>
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1686651
Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190516161114.27596-1-mreitz@redhat.com
Reviewed-by: John Snow <jsnow@redhat.com>
[mreitz: Adjusted commit message as per John's proposal]
Signed-off-by: Max Reitz <mreitz@redhat.com>
219 has two issues that may lead to sporadic failure, both of which are
the result of issuing query-jobs too early after a job has been
modified. This can then lead to different results based on whether the
modification has taken effect already or not.
First, query-jobs is issued right after the job has been created.
Besides its current progress possibly being in any random state (which
has already been taken care of), its total progress too is basically
arbitrary, because the job may not yet have been able to determine it.
This patch addresses this by just filtering the total progress, like
what has been done for the current progress already. However, for more
clarity, the filtering is changed to replace the values by a string
'FILTERED' instead of deleting them.
Secondly, query-jobs is issued right after a job has been resumed. The
job may or may not yet have had the time to actually perform any I/O,
and thus its current progress may or may not have advanced. To make
sure it has indeed advanced (which is what the reference output already
assumes), keep querying it until it has.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 20180606190628.8170-1-mreitz@redhat.com
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>