[PATCH 1/6] migration: improve error reporting of block driver state name

["Daniel P. Berrangé" <berrange@redhat.com>]

With blockdev, a BlockDriverState may not have an device name,
so using a node name is required as an alternative.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
---
 migration/savevm.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/migration/savevm.c b/migration/savevm.c
index b979ea6e7f..72dbad95ed 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -2648,7 +2648,7 @@ 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;
     }
 
@@ -2657,7 +2657,7 @@ 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;
         }
     }
@@ -2728,7 +2728,7 @@ 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;
     }
 
@@ -2846,14 +2846,14 @@ 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;
     }
 
@@ -2882,7 +2882,7 @@ 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;
     }
 
-- 
2.26.2