Re: [PATCH v3 13/13] monitor/hmp: Prefer to use hmp_handle_error for error reporting in block hmp commands

[Maxim Levitsky <mlevitsk@redhat.com>]

On Mon, 2020-01-27 at 12:36 +0200, Maxim Levitsky wrote:
> This way they all will be prefixed with 'Error:' which some parsers
> (e.g libvirt) need
> 
> Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1719169
> 
> Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>

And I probably will keep that patch since it is not invasive and
still does a nice refactoring.
Thoughts?

Best regards,
	Maxim Levitsky

> ---
>  block/monitor/block-hmp-cmds.c | 35 ++++++++++++++++++++--------------
>  1 file changed, 21 insertions(+), 14 deletions(-)
> 
> diff --git a/block/monitor/block-hmp-cmds.c b/block/monitor/block-hmp-cmds.c
> index 7bbe4e3814..5b060d380d 100644
> --- a/block/monitor/block-hmp-cmds.c
> +++ b/block/monitor/block-hmp-cmds.c
> @@ -84,7 +84,6 @@ void hmp_drive_add(Monitor *mon, const QDict *qdict)
>      mc = MACHINE_GET_CLASS(current_machine);
>      dinfo = drive_new(opts, mc->block_default_type, &err);
>      if (err) {
> -        error_report_err(err);
>          qemu_opts_del(opts);
>          goto err;
>      }
> @@ -98,7 +97,7 @@ void hmp_drive_add(Monitor *mon, const QDict *qdict)
>          monitor_printf(mon, "OK\n");
>          break;
>      default:
> -        monitor_printf(mon, "Can't hot-add drive to type %d\n", dinfo->type);
> +        error_setg(&err, "Can't hot-add drive to type %d", dinfo->type);
>          goto err;
>      }
>      return;
> @@ -109,6 +108,7 @@ err:
>          monitor_remove_blk(blk);
>          blk_unref(blk);
>      }
> +    hmp_handle_error(mon, err);
>  }
>  
>  void hmp_drive_del(Monitor *mon, const QDict *qdict)
> @@ -130,14 +130,14 @@ void hmp_drive_del(Monitor *mon, const QDict *qdict)
>  
>      blk = blk_by_name(id);
>      if (!blk) {
> -        error_report("Device '%s' not found", id);
> -        return;
> +        error_setg(&local_err, "Device '%s' not found", id);
> +        goto err;
>      }
>  
>      if (!blk_legacy_dinfo(blk)) {
> -        error_report("Deleting device added with blockdev-add"
> -                     " is not supported");
> -        return;
> +        error_setg(&local_err,
> +                   "Deleting device added with blockdev-add is not supported");
> +        goto err;
>      }
>  
>      aio_context = blk_get_aio_context(blk);
> @@ -146,9 +146,8 @@ void hmp_drive_del(Monitor *mon, const QDict *qdict)
>      bs = blk_bs(blk);
>      if (bs) {
>          if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, &local_err)) {
> -            error_report_err(local_err);
>              aio_context_release(aio_context);
> -            return;
> +            goto err;
>          }
>  
>          blk_remove_bs(blk);
> @@ -169,12 +168,15 @@ void hmp_drive_del(Monitor *mon, const QDict *qdict)
>      }
>  
>      aio_context_release(aio_context);
> +err:
> +    hmp_handle_error(mon, local_err);
>  }
>  
>  void hmp_commit(Monitor *mon, const QDict *qdict)
>  {
>      const char *device = qdict_get_str(qdict, "device");
>      BlockBackend *blk;
> +    Error *local_err = NULL;
>      int ret;
>  
>      if (!strcmp(device, "all")) {
> @@ -185,12 +187,12 @@ void hmp_commit(Monitor *mon, const QDict *qdict)
>  
>          blk = blk_by_name(device);
>          if (!blk) {
> -            error_report("Device '%s' not found", device);
> -            return;
> +            error_setg(&local_err, "Device '%s' not found", device);
> +            goto err;
>          }
>          if (!blk_is_available(blk)) {
> -            error_report("Device '%s' has no medium", device);
> -            return;
> +            error_setg(&local_err, "Device '%s' has no medium", device);
> +            goto err;
>          }
>  
>          bs = blk_bs(blk);
> @@ -202,8 +204,13 @@ void hmp_commit(Monitor *mon, const QDict *qdict)
>          aio_context_release(aio_context);
>      }
>      if (ret < 0) {
> -        error_report("'commit' error for '%s': %s", device, strerror(-ret));
> +        error_setg(&local_err,
> +                   "'commit' error for '%s': %s", device, strerror(-ret));
> +        goto err;
>      }
> +    return;
> +err:
> +    hmp_handle_error(mon, local_err);
>  }
>  
>  void hmp_drive_mirror(Monitor *mon, const QDict *qdict)