Re: [PATCH v3 1/7] migration: improve error reporting of block driver state name

["Dr. David Alan Gilbert" <dgilbert@redhat.com>]

* Daniel P. Berrangé (berrange@redhat.com) wrote:
> With blockdev, a BlockDriverState may not have a device name,
> so using a node name is required as an alternative.
> 
> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

Queuing this one by itself since it's useful anyway.

Dave

> ---
>  migration/savevm.c         | 12 ++++++------
>  tests/qemu-iotests/267.out |  4 ++--
>  2 files changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/migration/savevm.c b/migration/savevm.c
> index a843d202b5..304d98ff78 100644
> --- a/migration/savevm.c
> +++ b/migration/savevm.c
> @@ -2682,7 +2682,7 @@ int save_snapshot(const char *name, Error **errp)
>  
>      if (!bdrv_all_can_snapshot(&bs)) {
>          error_setg(errp, "Device '%s' is writable but does not support "
> -                   "snapshots", bdrv_get_device_name(bs));
> +                   "snapshots", bdrv_get_device_or_node_name(bs));
>          return ret;
>      }
>  
> @@ -2691,7 +2691,7 @@ int save_snapshot(const char *name, Error **errp)
>          ret = bdrv_all_delete_snapshot(name, &bs1, errp);
>          if (ret < 0) {
>              error_prepend(errp, "Error while deleting snapshot on device "
> -                          "'%s': ", bdrv_get_device_name(bs1));
> +                          "'%s': ", bdrv_get_device_or_node_name(bs1));
>              return ret;
>          }
>      }
> @@ -2766,7 +2766,7 @@ int save_snapshot(const char *name, Error **errp)
>      ret = bdrv_all_create_snapshot(sn, bs, vm_state_size, &bs);
>      if (ret < 0) {
>          error_setg(errp, "Error while creating snapshot on '%s'",
> -                   bdrv_get_device_name(bs));
> +                   bdrv_get_device_or_node_name(bs));
>          goto the_end;
>      }
>  
> @@ -2884,14 +2884,14 @@ int load_snapshot(const char *name, Error **errp)
>      if (!bdrv_all_can_snapshot(&bs)) {
>          error_setg(errp,
>                     "Device '%s' is writable but does not support snapshots",
> -                   bdrv_get_device_name(bs));
> +                   bdrv_get_device_or_node_name(bs));
>          return -ENOTSUP;
>      }
>      ret = bdrv_all_find_snapshot(name, &bs);
>      if (ret < 0) {
>          error_setg(errp,
>                     "Device '%s' does not have the requested snapshot '%s'",
> -                   bdrv_get_device_name(bs), name);
> +                   bdrv_get_device_or_node_name(bs), name);
>          return ret;
>      }
>  
> @@ -2920,7 +2920,7 @@ int load_snapshot(const char *name, Error **errp)
>      ret = bdrv_all_goto_snapshot(name, &bs, errp);
>      if (ret < 0) {
>          error_prepend(errp, "Could not load snapshot '%s' on '%s': ",
> -                      name, bdrv_get_device_name(bs));
> +                      name, bdrv_get_device_or_node_name(bs));
>          goto err_drain;
>      }
>  
> diff --git a/tests/qemu-iotests/267.out b/tests/qemu-iotests/267.out
> index d6d80c099f..215902b3ad 100644
> --- a/tests/qemu-iotests/267.out
> +++ b/tests/qemu-iotests/267.out
> @@ -81,11 +81,11 @@ Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
>  Testing: -blockdev driver=file,filename=TEST_DIR/t.IMGFMT,node-name=file
>  QEMU X.Y.Z monitor - type 'help' for more information
>  (qemu) savevm snap0
> -Error: Device '' is writable but does not support snapshots
> +Error: Device 'file' is writable but does not support snapshots
>  (qemu) info snapshots
>  No available block device supports snapshots
>  (qemu) loadvm snap0
> -Error: Device '' is writable but does not support snapshots
> +Error: Device 'file' is writable but does not support snapshots
>  (qemu) quit
>  
>  Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
> -- 
> 2.26.2
> 
-- 
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK