Add native VOL checks to deprecated functions (#3647)

* Add native VOL checks to deprecated functions

* Remove unneeded native VOL checks

* Move native checks to top level calls

2 files changed, 145 insertions, 58 deletions

diff --git a/src/H5Odeprec.c b/src/H5Odeprec.c
index 6e8b34e..3de5818 100644
--- a/src/H5Odeprec.c
+++ b/src/H5Odeprec.c
@@ -116,9 +116,10 @@ static herr_t
 H5O__iterate1_adapter(hid_t obj_id, const char *name, const H5O_info2_t *oinfo2, void *op_data)
 {
     H5O_visit1_adapter_t *shim_data = (H5O_visit1_adapter_t *)op_data;
-    H5O_info1_t           oinfo;                    /* Deprecated object info struct */
-    unsigned              dm_fields;                /* Fields for data model query */
-    unsigned              nat_fields;               /* Fields for native query */
+    H5O_info1_t           oinfo;      /* Deprecated object info struct */
+    unsigned              dm_fields;  /* Fields for data model query */
+    unsigned              nat_fields; /* Fields for native query */
+    H5VL_object_t        *vol_obj;
     herr_t                ret_value = H5_ITER_CONT; /* Return value */
 
     FUNC_ENTER_PACKAGE
@@ -158,7 +159,6 @@ H5O__iterate1_adapter(hid_t obj_id, const char *name, const H5O_info2_t *oinfo2,
     /* Check for retrieving native information */
     nat_fields = shim_data->fields & (H5O_INFO_HDR | H5O_INFO_META_SIZE);
     if (nat_fields) {
-        H5VL_object_t                     *vol_obj;      /* Object of obj_id */
         H5VL_optional_args_t               vol_cb_args;  /* Arguments to VOL callback */
         H5VL_native_object_optional_args_t obj_opt_args; /* Arguments for optional operation */
         H5VL_loc_params_t                  loc_params;   /* Location parameters for VOL callback */
@@ -401,7 +401,8 @@ H5Oget_info1(hid_t loc_id, H5O_info1_t *oinfo /*out*/)
 {
     H5VL_object_t    *vol_obj = NULL; /* Object of loc_id */
     H5VL_loc_params_t loc_params;
-    herr_t            ret_value = SUCCEED; /* Return value */
+    bool              is_native_vol_obj = false;
+    herr_t            ret_value         = SUCCEED; /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE2("e", "ix", loc_id, oinfo);
@@ -418,6 +419,15 @@ H5Oget_info1(hid_t loc_id, H5O_info1_t *oinfo /*out*/)
     if (NULL == (vol_obj = H5VL_vol_object(loc_id)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid location identifier");
 
+    /* Check if using native VOL connector */
+    if (H5VL_object_is_native(vol_obj, &is_native_vol_obj) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't determine if VOL object is native connector object");
+
+    /* Must use native VOL connector for this operation */
+    if (!is_native_vol_obj)
+        HGOTO_ERROR(H5E_OHDR, H5E_VOL, FAIL,
+                    "Deprecated H5Oget_info1 is only meant to be used with the native VOL connector");
+
     /* Retrieve the object's information */
     if (H5O__get_info_old(vol_obj, &loc_params, oinfo, H5O_INFO_ALL) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't get deprecated info for object");
@@ -441,7 +451,8 @@ H5Oget_info_by_name1(hid_t loc_id, const char *name, H5O_info1_t *oinfo /*out*/,
 {
     H5VL_object_t    *vol_obj = NULL; /* object of loc_id */
     H5VL_loc_params_t loc_params;
-    herr_t            ret_value = SUCCEED; /* Return value */
+    bool              is_native_vol_obj = false;
+    herr_t            ret_value         = SUCCEED; /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE4("e", "i*sxi", loc_id, name, oinfo, lapl_id);
@@ -468,6 +479,15 @@ H5Oget_info_by_name1(hid_t loc_id, const char *name, H5O_info1_t *oinfo /*out*/,
     if (NULL == (vol_obj = H5VL_vol_object(loc_id)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid location identifier");
 
+    /* Check if using native VOL connector */
+    if (H5VL_object_is_native(vol_obj, &is_native_vol_obj) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't determine if VOL object is native connector object");
+
+    /* Must use native VOL connector for this operation */
+    if (!is_native_vol_obj)
+        HGOTO_ERROR(H5E_OHDR, H5E_VOL, FAIL,
+                    "Deprecated H5Oget_info_by_name1 is only meant to be used with the native VOL connector");
+
     /* Retrieve the object's information */
     if (H5O__get_info_old(vol_obj, &loc_params, oinfo, H5O_INFO_ALL) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't get deprecated info for object");
@@ -493,7 +513,8 @@ H5Oget_info_by_idx1(hid_t loc_id, const char *group_name, H5_index_t idx_type, H
 {
     H5VL_object_t    *vol_obj = NULL; /* object of loc_id */
     H5VL_loc_params_t loc_params;
-    herr_t            ret_value = SUCCEED; /* Return value */
+    bool              is_native_vol_obj = false;
+    herr_t            ret_value         = SUCCEED; /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE7("e", "i*sIiIohxi", loc_id, group_name, idx_type, order, n, oinfo, lapl_id);
@@ -524,6 +545,15 @@ H5Oget_info_by_idx1(hid_t loc_id, const char *group_name, H5_index_t idx_type, H
     if (NULL == (vol_obj = H5VL_vol_object(loc_id)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid location identifier");
 
+    /* Check if using native VOL connector */
+    if (H5VL_object_is_native(vol_obj, &is_native_vol_obj) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't determine if VOL object is native connector object");
+
+    /* Must use native VOL connector for this operation */
+    if (!is_native_vol_obj)
+        HGOTO_ERROR(H5E_OHDR, H5E_VOL, FAIL,
+                    "Deprecated H5Oget_info_by_idx1 is only meant to be used with the native VOL connector");
+
     /* Retrieve the object's information */
     if (H5O__get_info_old(vol_obj, &loc_params, oinfo, H5O_INFO_ALL) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't get deprecated info for object");
@@ -574,7 +604,7 @@ H5Oget_info2(hid_t loc_id, H5O_info1_t *oinfo /*out*/, unsigned fields)
                     "can't determine if VOL object is native connector object");
     if (!is_native_vol_obj)
         HGOTO_ERROR(H5E_OHDR, H5E_BADVALUE, H5I_INVALID_HID,
-                    "H5Oget_info2 is only meant to be used with the native VOL connector");
+                    "Deprecated H5Oget_info2 is only meant to be used with the native VOL connector");
 
     /* Retrieve deprecated info struct */
     if (H5O__get_info_old(vol_obj, &loc_params, oinfo, fields) < 0)
@@ -637,7 +667,7 @@ H5Oget_info_by_name2(hid_t loc_id, const char *name, H5O_info1_t *oinfo /*out*/,
                     "can't determine if VOL object is native connector object");
     if (!is_native_vol_obj)
         HGOTO_ERROR(H5E_OHDR, H5E_BADVALUE, H5I_INVALID_HID,
-                    "H5Oget_info_by_name2 is only meant to be used with the native VOL connector");
+                    "Deprecated H5Oget_info_by_name2 is only meant to be used with the native VOL connector");
 
     /* Retrieve deprecated info struct */
     if (H5O__get_info_old(vol_obj, &loc_params, oinfo, fields) < 0)
@@ -706,7 +736,7 @@ H5Oget_info_by_idx2(hid_t loc_id, const char *group_name, H5_index_t idx_type, H
                     "can't determine if VOL object is native connector object");
     if (!is_native_vol_obj)
         HGOTO_ERROR(H5E_OHDR, H5E_BADVALUE, H5I_INVALID_HID,
-                    "H5Oget_info_by_idx2 is only meant to be used with the native VOL connector");
+                    "Deprecated H5Oget_info_by_idx2 is only meant to be used with the native VOL connector");
 
     /* Retrieve deprecated info struct */
     if (H5O__get_info_old(vol_obj, &loc_params, oinfo, fields) < 0)
@@ -753,6 +783,7 @@ H5Ovisit1(hid_t obj_id, H5_index_t idx_type, H5_iter_order_t order, H5O_iterate1
     H5VL_loc_params_t           loc_params;     /* Location parameters for object access */
     H5O_visit1_adapter_t        shim_data;      /* Adapter for passing app callback & user data */
     herr_t                      ret_value;      /* Return value */
+    bool                        is_native_vol_obj = false;
 
     FUNC_ENTER_API(FAIL)
     H5TRACE5("e", "iIiIoOi*x", obj_id, idx_type, order, op, op_data);
@@ -769,6 +800,15 @@ H5Ovisit1(hid_t obj_id, H5_index_t idx_type, H5_iter_order_t order, H5O_iterate1
     if (NULL == (vol_obj = H5VL_vol_object(obj_id)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid location identifier");
 
+    /* Check if using native VOL connector */
+    if (H5VL_object_is_native(vol_obj, &is_native_vol_obj) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't determine if VOL object is native connector object");
+
+    /* Must use native VOL connector for this operation */
+    if (!is_native_vol_obj)
+        HGOTO_ERROR(H5E_OHDR, H5E_VOL, FAIL,
+                    "Deprecated H5Ovisit1 is only meant to be used with the native VOL connector");
+
     /* Set location parameters */
     loc_params.type     = H5VL_OBJECT_BY_SELF;
     loc_params.obj_type = H5I_get_type(obj_id);
@@ -833,6 +873,7 @@ H5Ovisit_by_name1(hid_t loc_id, const char *obj_name, H5_index_t idx_type, H5_it
     H5VL_loc_params_t           loc_params;     /* Location parameters for object access */
     H5O_visit1_adapter_t        shim_data;      /* Adapter for passing app callback & user data */
     herr_t                      ret_value;      /* Return value */
+    bool                        is_native_vol_obj = false;
 
     FUNC_ENTER_API(FAIL)
     H5TRACE7("e", "i*sIiIoOi*xi", loc_id, obj_name, idx_type, order, op, op_data, lapl_id);
@@ -857,6 +898,15 @@ H5Ovisit_by_name1(hid_t loc_id, const char *obj_name, H5_index_t idx_type, H5_it
     if (NULL == (vol_obj = H5VL_vol_object(loc_id)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid location identifier");
 
+    /* Check if using native VOL connector */
+    if (H5VL_object_is_native(vol_obj, &is_native_vol_obj) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't determine if VOL object is native connector object");
+
+    /* Must use native VOL connector for this operation */
+    if (!is_native_vol_obj)
+        HGOTO_ERROR(H5E_OHDR, H5E_VOL, FAIL,
+                    "Deprecated H5Ovisit_by_name1 is only meant to be used with the native VOL connector");
+
     /* Set location parameters */
     loc_params.type                         = H5VL_OBJECT_BY_NAME;
     loc_params.loc_data.loc_by_name.name    = obj_name;
@@ -949,9 +999,10 @@ H5Ovisit2(hid_t obj_id, H5_index_t idx_type, H5_iter_order_t order, H5O_iterate1
     if (H5VL_object_is_native(vol_obj, &is_native_vol_obj) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, H5I_INVALID_HID,
                     "can't determine if VOL object is native connector object");
+
     if (!is_native_vol_obj)
         HGOTO_ERROR(H5E_OHDR, H5E_BADVALUE, H5I_INVALID_HID,
-                    "H5Ovisit2 is only meant to be used with the native VOL connector");
+                    "Deprecated H5Ovisit2 is only meant to be used with the native VOL connector");
 
     /* Set location parameters */
     loc_params.type     = H5VL_OBJECT_BY_SELF;
@@ -1053,7 +1104,7 @@ H5Ovisit_by_name2(hid_t loc_id, const char *obj_name, H5_index_t idx_type, H5_it
                     "can't determine if VOL object is native connector object");
     if (!is_native_vol_obj)
         HGOTO_ERROR(H5E_OHDR, H5E_BADVALUE, H5I_INVALID_HID,
-                    "H5Ovisit_by_name2 is only meant to be used with the native VOL connector");
+                    "Deprecated H5Ovisit_by_name2 is only meant to be used with the native VOL connector");
 
     /* Set location parameters */
     loc_params.type                         = H5VL_OBJECT_BY_NAME;
diff --git a/src/H5Rdeprec.c b/src/H5Rdeprec.c
index 773d8b0..1d12eba 100644
--- a/src/H5Rdeprec.c
+++ b/src/H5Rdeprec.c
@@ -101,14 +101,14 @@ H5R__decode_token_compat(H5VL_object_t *vol_obj, H5I_type_t type, H5R_type_t ref
 
 #ifndef NDEBUG
     {
-        bool is_native = false; /* Whether the src file is using the native VOL connector */
+        bool is_native_vol_obj = false; /* Whether the src file is using the native VOL connector */
 
         /* Check if using native VOL connector */
-        if (H5VL_object_is_native(vol_obj, &is_native) < 0)
+        if (H5VL_object_is_native(vol_obj, &is_native_vol_obj) < 0)
             HGOTO_ERROR(H5E_REFERENCE, H5E_CANTGET, FAIL, "can't query if file uses native VOL connector");
 
         /* Must use native VOL connector for this operation */
-        assert(is_native);
+        assert(is_native_vol_obj);
     }
 #endif /* NDEBUG */
 
@@ -251,7 +251,8 @@ H5Rget_obj_type1(hid_t id, H5R_type_t ref_type, const void *ref)
     H5O_token_t            obj_token = {0};                        /* Object token */
     const unsigned char   *buf       = (const unsigned char *)ref; /* Reference buffer */
     H5O_type_t             obj_type  = H5O_TYPE_UNKNOWN;           /* Type of the referenced object */
-    H5G_obj_t              ret_value;                              /* Return value */
+    bool                   is_native_vol_obj; /* Whether the native VOL connector is in use */
+    H5G_obj_t              ret_value;         /* Return value */
 
     FUNC_ENTER_API(H5G_UNKNOWN)
     H5TRACE3("Go", "iRt*x", id, ref_type, ref);
@@ -266,6 +267,16 @@ H5Rget_obj_type1(hid_t id, H5R_type_t ref_type, const void *ref)
     if (NULL == (vol_obj = H5VL_vol_object(id)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5G_UNKNOWN, "invalid location identifier");
 
+    /* Check if using native VOL connector */
+    if (H5VL_object_is_native(vol_obj, &is_native_vol_obj) < 0)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTGET, FAIL,
+                    "can't determine if VOL object is native connector object");
+
+    /* Must use native VOL connector for this operation */
+    if (!is_native_vol_obj)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_VOL, FAIL,
+                    "H5Rget_obj_type1 is only meant to be used with the native VOL connector");
+
     /* Get object type */
     if ((vol_obj_type = H5I_get_type(id)) < 0)
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5G_UNKNOWN, "invalid location identifier");
@@ -315,7 +326,8 @@ H5Rdereference1(hid_t obj_id, H5R_type_t ref_type, const void *ref)
     H5I_type_t           opened_type;                             /* Opened object type */
     void                *opened_obj = NULL;                       /* Opened object */
     const unsigned char *buf        = (const unsigned char *)ref; /* Reference buffer */
-    hid_t                ret_value  = H5I_INVALID_HID;            /* Return value */
+    bool                 is_native_vol_obj;           /* Whether the native VOL connector is in use */
+    hid_t                ret_value = H5I_INVALID_HID; /* Return value */
 
     FUNC_ENTER_API(H5I_INVALID_HID)
     H5TRACE3("i", "iRt*x", obj_id, ref_type, ref);
@@ -330,6 +342,16 @@ H5Rdereference1(hid_t obj_id, H5R_type_t ref_type, const void *ref)
     if (NULL == (vol_obj = H5VL_vol_object(obj_id)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "invalid location identifier");
 
+    /* Check if using native VOL connector */
+    if (H5VL_object_is_native(vol_obj, &is_native_vol_obj) < 0)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTGET, FAIL,
+                    "can't determine if VOL object is native connector object");
+
+    /* Must use native VOL connector for this operation */
+    if (!is_native_vol_obj)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_VOL, FAIL,
+                    "H5Rdereference1 is only meant to be used with the native VOL connector");
+
     /* Get object type */
     if ((vol_obj_type = H5I_get_type(obj_id)) < 0)
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "invalid location identifier");
@@ -382,8 +404,9 @@ H5Rcreate(void *ref, hid_t loc_id, const char *name, H5R_type_t ref_type, hid_t
     H5VL_file_get_args_t        file_get_vol_cb_args;           /* Arguments to VOL callback */
     hid_t                       file_id      = H5I_INVALID_HID; /* File ID for region reference */
     void                       *vol_obj_file = NULL;
-    unsigned char              *buf          = (unsigned char *)ref; /* Return reference pointer */
-    herr_t                      ret_value    = SUCCEED;              /* Return value */
+    bool           is_native_vol_obj = false; /* Whether the src file is using the native VOL connector */
+    unsigned char *buf               = (unsigned char *)ref; /* Return reference pointer */
+    herr_t         ret_value         = SUCCEED;              /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE5("e", "*xi*sRti", ref, loc_id, name, ref_type, space_id);
@@ -404,18 +427,13 @@ H5Rcreate(void *ref, hid_t loc_id, const char *name, H5R_type_t ref_type, hid_t
     if (NULL == (vol_obj = H5VL_vol_object(loc_id)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid location identifier");
 
-#ifndef NDEBUG
-    {
-        bool is_native = false; /* Whether the src file is using the native VOL connector */
+    /* Check if using native VOL connector */
+    if (H5VL_object_is_native(vol_obj, &is_native_vol_obj) < 0)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTGET, FAIL, "can't query if file uses native VOL connector");
 
-        /* Check if using native VOL connector */
-        if (H5VL_object_is_native(vol_obj, &is_native) < 0)
-            HGOTO_ERROR(H5E_REFERENCE, H5E_CANTGET, FAIL, "can't query if file uses native VOL connector");
-
-        /* Must use native VOL connector for this operation */
-        assert(is_native);
-    }
-#endif /* NDEBUG */
+    /* Must use native VOL connector for this operation */
+    if (!is_native_vol_obj)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_VOL, FAIL, "must use native VOL connector to create reference");
 
     /* Get object type */
     if ((vol_obj_type = H5I_get_type(loc_id)) < 0)
@@ -500,13 +518,14 @@ done:
 herr_t
 H5Rget_obj_type2(hid_t id, H5R_type_t ref_type, const void *ref, H5O_type_t *obj_type /*out*/)
 {
-    H5VL_object_t         *vol_obj      = NULL;                    /* Object of loc_id */
-    H5I_type_t             vol_obj_type = H5I_BADID;               /* Object type of loc_id */
-    H5VL_object_get_args_t vol_cb_args;                            /* Arguments to VOL callback */
-    H5VL_loc_params_t      loc_params;                             /* Location parameters */
-    H5O_token_t            obj_token = {0};                        /* Object token */
-    const unsigned char   *buf       = (const unsigned char *)ref; /* Reference pointer */
-    herr_t                 ret_value = SUCCEED;                    /* Return value */
+    H5VL_object_t         *vol_obj      = NULL;                            /* Object of loc_id */
+    H5I_type_t             vol_obj_type = H5I_BADID;                       /* Object type of loc_id */
+    H5VL_object_get_args_t vol_cb_args;                                    /* Arguments to VOL callback */
+    H5VL_loc_params_t      loc_params;                                     /* Location parameters */
+    H5O_token_t            obj_token         = {0};                        /* Object token */
+    const unsigned char   *buf               = (const unsigned char *)ref; /* Reference pointer */
+    bool                   is_native_vol_obj = false;   /* Whether the native VOL connector is in use */
+    herr_t                 ret_value         = SUCCEED; /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE4("e", "iRt*xx", id, ref_type, ref, obj_type);
@@ -521,6 +540,16 @@ H5Rget_obj_type2(hid_t id, H5R_type_t ref_type, const void *ref, H5O_type_t *obj
     if (NULL == (vol_obj = H5VL_vol_object(id)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid location identifier");
 
+    /* Check if using native VOL connector */
+    if (H5VL_object_is_native(vol_obj, &is_native_vol_obj) < 0)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTGET, FAIL,
+                    "can't determine if VOL object is native connector object");
+
+    /* Must use native VOL connector for this operation */
+    if (!is_native_vol_obj)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_VOL, FAIL,
+                    "H5Rget_obj_type2 is only meant to be used with the native VOL connector");
+
     /* Get object type */
     if ((vol_obj_type = H5I_get_type(id)) < 0)
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid location identifier");
@@ -560,14 +589,15 @@ done:
 hid_t
 H5Rdereference2(hid_t obj_id, hid_t oapl_id, H5R_type_t ref_type, const void *ref)
 {
-    H5VL_object_t       *vol_obj      = NULL;                     /* Object of loc_id */
-    H5I_type_t           vol_obj_type = H5I_BADID;                /* Object type of loc_id */
-    H5VL_loc_params_t    loc_params;                              /* Location parameters */
-    H5O_token_t          obj_token = {0};                         /* Object token */
-    H5I_type_t           opened_type;                             /* Opened object type */
-    void                *opened_obj = NULL;                       /* Opened object */
-    const unsigned char *buf        = (const unsigned char *)ref; /* Reference pointer */
-    hid_t                ret_value  = H5I_INVALID_HID;            /* Return value */
+    H5VL_object_t       *vol_obj      = NULL;                            /* Object of loc_id */
+    H5I_type_t           vol_obj_type = H5I_BADID;                       /* Object type of loc_id */
+    H5VL_loc_params_t    loc_params;                                     /* Location parameters */
+    H5O_token_t          obj_token = {0};                                /* Object token */
+    H5I_type_t           opened_type;                                    /* Opened object type */
+    void                *opened_obj        = NULL;                       /* Opened object */
+    const unsigned char *buf               = (const unsigned char *)ref; /* Reference pointer */
+    bool                 is_native_vol_obj = false;           /* Whether the native VOL connector is in use */
+    hid_t                ret_value         = H5I_INVALID_HID; /* Return value */
 
     FUNC_ENTER_API(H5I_INVALID_HID)
     H5TRACE4("i", "iiRt*x", obj_id, oapl_id, ref_type, ref);
@@ -588,6 +618,16 @@ H5Rdereference2(hid_t obj_id, hid_t oapl_id, H5R_type_t ref_type, const void *re
     if (NULL == (vol_obj = H5VL_vol_object(obj_id)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "invalid file identifier");
 
+    /* Check if using native VOL connector */
+    if (H5VL_object_is_native(vol_obj, &is_native_vol_obj) < 0)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTGET, FAIL,
+                    "can't determine if VOL object is native connector object");
+
+    /* Must use native VOL connector for this operation */
+    if (!is_native_vol_obj)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_VOL, FAIL,
+                    "H5Rdereference2 is only meant to be used with the native VOL connector");
+
     /* Get object type */
     if ((vol_obj_type = H5I_get_type(obj_id)) < 0)
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "invalid location identifier");
@@ -639,7 +679,8 @@ H5Rget_region(hid_t id, H5R_type_t ref_type, const void *ref)
     H5S_t                *space    = NULL;                       /* Dataspace object */
     hid_t                 file_id  = H5I_INVALID_HID;            /* File ID for region reference */
     const unsigned char  *buf      = (const unsigned char *)ref; /* Reference pointer */
-    hid_t                 ret_value;                             /* Return value */
+    bool  is_native_vol_obj        = false; /* Whether the src file is using the native VOL connector */
+    hid_t ret_value;                        /* Return value */
 
     FUNC_ENTER_API(H5I_INVALID_HID)
     H5TRACE3("i", "iRt*x", id, ref_type, ref);
@@ -654,19 +695,14 @@ H5Rget_region(hid_t id, H5R_type_t ref_type, const void *ref)
     if (NULL == (vol_obj = H5VL_vol_object(id)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "invalid file identifier");
 
-#ifndef NDEBUG
-    {
-        bool is_native = false; /* Whether the src file is using the native VOL connector */
-
-        /* Check if using native VOL connector */
-        if (H5VL_object_is_native(vol_obj, &is_native) < 0)
-            HGOTO_ERROR(H5E_REFERENCE, H5E_CANTGET, H5I_INVALID_HID,
-                        "can't query if file uses native VOL connector");
+    /* Check if using native VOL connector */
+    if (H5VL_object_is_native(vol_obj, &is_native_vol_obj) < 0)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTGET, H5I_INVALID_HID,
+                    "can't query if file uses native VOL connector");
 
-        /* Must use native VOL connector for this operation */
-        assert(is_native);
-    }
-#endif /* NDEBUG */
+    if (!is_native_vol_obj)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_VOL, FAIL,
+                    "H5Rget_region is only meant to be used with the native VOL connector");
 
     /* Get object type */
     if ((vol_obj_type = H5I_get_type(id)) < 0)