Re: [PATCH v4 1/5] migration: Refactor error handling in source return path

[Fabiano Rosas <farosas@suse.de>]

Peter Xu <peterx@redhat.com> writes:

> rp_state.error was a boolean used to show error happened in return path
> thread.  That's not only duplicating error reporting (migrate_set_error),
> but also not good enough in that we only do error_report() and set it to
> true, we never can keep a history of the exact error and show it in
> query-migrate.
>
> To make this better, a few things done:
>
>   - Use error_setg() rather than error_report() across the whole lifecycle
>     of return path thread, keeping the error in an Error*.
>
>   - With above, no need to have mark_source_rp_bad(), remove it, alongside
>     with rp_state.error itself.
>
>   - Use migrate_set_error() to apply that captured error to the global
>     migration object when error occured in this thread.
>
>   - Do the same when detected qemufile error in source return path
>
> We need to re-export qemu_file_get_error_obj() to do the last one.
>
> Signed-off-by: Peter Xu <peterx@redhat.com>

Reviewed-by: Fabiano Rosas <farosas@suse.de>