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Re: [PATCH 01/33] migration: push Error **errp into qemu_loadvm_state()
From: |
Daniel P . Berrangé |
Subject: |
Re: [PATCH 01/33] migration: push Error **errp into qemu_loadvm_state() |
Date: |
Fri, 5 Feb 2021 09:33:45 +0000 |
User-agent: |
Mutt/1.14.6 (2020-07-11) |
On Thu, Feb 04, 2021 at 10:57:20PM +0100, Philippe Mathieu-Daudé wrote:
> On 2/4/21 6:18 PM, Daniel P. Berrangé wrote:
> > This is an incremental step in converting vmstate loading code to report
> > via Error objects instead of printing directly to the console/monitor.
> >
> > Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
> > ---
> > migration/migration.c | 4 ++--
> > migration/savevm.c | 36 ++++++++++++++++++++----------------
> > migration/savevm.h | 2 +-
> > 3 files changed, 23 insertions(+), 19 deletions(-)
> ...
>
> > diff --git a/migration/savevm.c b/migration/savevm.c
> > index 6b320423c7..c8d93eee1e 100644
> > --- a/migration/savevm.c
> > +++ b/migration/savevm.c
> > @@ -2638,40 +2638,49 @@ out:
> > return ret;
> > }
> >
> > -int qemu_loadvm_state(QEMUFile *f)
> > +int qemu_loadvm_state(QEMUFile *f, Error **errp)
> > {
> > MigrationIncomingState *mis = migration_incoming_get_current();
> > - Error *local_err = NULL;
> > int ret;
> >
> > - if (qemu_savevm_state_blocked(&local_err)) {
> > - error_report_err(local_err);
> > - return -EINVAL;
> > + if (qemu_savevm_state_blocked(errp)) {
> > + return -1;
> > }
> >
> > ret = qemu_loadvm_state_header(f);
> > if (ret) {
> > - return ret;
> > + error_setg(errp, "Error %d while loading VM state", ret);
>
> Using error_setg_errno() instead (multiple occurences):
I don't think we want todo that in general, because the code is
already not reliable at actually returning an errno value, sometimes
returning just "-1". At the end of this series it will almost always
be returning "-1", not an errno. There are some places where an
errno is relevant though - specificially qemu_get_file_error calls.
> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
>
Regards,
Daniel
--
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- [PATCH 00/33] migration: capture error reports into Error object, Daniel P . Berrangé, 2021/02/04
- [PATCH 02/33] migration: push Error **errp into qemu_loadvm_state_header(), Daniel P . Berrangé, 2021/02/04
- [PATCH 04/33] migration: push Error **errp into qemu_load_device_state(), Daniel P . Berrangé, 2021/02/04
- [PATCH 07/33] migration: push Error **errp into qemu_loadvm_section_part_end(), Daniel P . Berrangé, 2021/02/04
- [PATCH 09/33] migration: push Error **errp into loadvm_handle_cmd_packaged(), Daniel P . Berrangé, 2021/02/04
- [PATCH 03/33] migration: push Error **errp into qemu_loadvm_state_setup(), Daniel P . Berrangé, 2021/02/04