Re: KVM Call minutes for 2012-09-25

[Markus Armbruster <armbru@redhat.com>]

Juan Quintela <quintela@redhat.com> writes:

> Hi
>
> This are this week minutes:
>
> - URI parsing library for glusterfs: libxml2 vs. in-tree "fork" of the
> same code. (Paolo)
>  * code hasn't changed in 2 years, it is really stable
>  * anthony wants to copy the code
>
> - there are several commands that do blocking IO
>   dump-guest-memory/screen-dump
>   convert to asynchronous commands after we move all to QAPI
>   only two commands missingto port to QAPI, and one is posted on list
>   non-blocking IO to a file is a challenge
>   (we have code on the block layer for it)
>
> - how to give errors from OpenFile to the caller
>   putting errno as int: bad idea
>   putting as strerrno string: also a bad idea, no warantees

Use the identifiers instead of their non-portable numeric encodings or
strerror() descriptions: "EPERM", "EINVAL", ...

>   Using an extended error code
>   Put it as a string that can be parsed?
>   Paolo suggest to create a new error class
>   We don't warantee that errors would be "parseable".

We don't want programs to parse the human-readable error string.