diff options
Diffstat (limited to 'block/snapshot.c')
| -rw-r--r-- | block/snapshot.c | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/block/snapshot.c b/block/snapshot.c index 220173deae..0b129bee8f 100644 --- a/block/snapshot.c +++ b/block/snapshot.c @@ -678,7 +678,9 @@ int bdrv_all_create_snapshot(QEMUSnapshotInfo *sn, return 0; } -BlockDriverState *bdrv_all_find_vmstate_bs(bool has_devices, strList *devices, + +BlockDriverState *bdrv_all_find_vmstate_bs(const char *vmstate_bs, + bool has_devices, strList *devices, Error **errp) { g_autoptr(GList) bdrvs = NULL; @@ -699,13 +701,31 @@ BlockDriverState *bdrv_all_find_vmstate_bs(bool has_devices, strList *devices, bdrv_can_snapshot(bs); aio_context_release(ctx); - if (found) { + if (vmstate_bs) { + if (g_str_equal(vmstate_bs, + bdrv_get_node_name(bs))) { + if (found) { + return bs; + } else { + error_setg(errp, + "vmstate block device '%s' does not support snapshots", + vmstate_bs); + return NULL; + } + } + } else if (found) { return bs; } iterbdrvs = iterbdrvs->next; } - error_setg(errp, "No block device supports snapshots"); + if (vmstate_bs) { + error_setg(errp, + "vmstate block device '%s' does not exist", vmstate_bs); + } else { + error_setg(errp, + "no block device can store vmstate for snapshot"); + } return NULL; } |