Hi Luiz, Markus and everyone.
I am working on a qemu enhancement to display io-status in each
query-block command, not just those for devices which have werror and/or
rerror set to stop on error.
I'd like to verify the reasons behind the query-block command not
reporting io-status if errors were reported to the guest or ignored. A
clue may come from the original code review email[1] for when this code
was implemented:
"In case of multiple errors being triggered in sequence only the first
one is stored. The I/O status is always reset to BDRV_IOS_OK when the
'cont' command is issued."
From this I infer:
- io-status is shown when qemu is stopped onerror so errors can be seen
in cases where a guest does not handle them.
- io-status is not shown when errors are already being handled by a guest
- io-status is not shown when errors are ignored
Is this correct? Are there other subtleties/reasons as well?
Thanks,
Jack
[1] http://lists.nongnu.org/archive/html/qemu-devel/2011-09/msg02940.html
