librbd: snap_get_limit compatibility check

Signed-off-by: Mykola Golub <mgolub@mirantis.com>

diff --git a/src/librbd/internal.cc b/src/librbd/internal.cc
index 13dc586c4dc6ba67ac259adc5126f3424c71be38..21188895c2770964debe0a017f5e2e3fdfc6837d 100644 (file)
--- a/src/librbd/internal.cc
+++ b/src/librbd/internal.cc
@@ -1774,8 +1774,13 @@ int mirror_image_disable_internal(ImageCtx *ictx, bool force,
 
   int snap_get_limit(ImageCtx *ictx, uint64_t *limit)
   {
-    return cls_client::snapshot_get_limit(&ictx->md_ctx, ictx->header_oid,
-                                         limit);
+    int r = cls_client::snapshot_get_limit(&ictx->md_ctx, ictx->header_oid,
+                                           limit);
+    if (r == -EOPNOTSUPP) {
+      *limit = UINT64_MAX;
+      r = 0;
+    }
+    return r;
   }
 
   int snap_set_limit(ImageCtx *ictx, uint64_t limit)