diff --git a/src/context.h b/src/context.h
index 722f946fe2..ae2f8e9571 100644
--- a/src/context.h
+++ b/src/context.h
@@ -449,13 +449,15 @@ LIBYANG_API_DECL void ly_ctx_set_module_imp_clb(struct ly_ctx *ctx, ly_module_im
  * @brief Callback for getting arbitrary run-time data required by an extension instance.
  *
  * @param[in] ext Compiled extension instance.
+ * @param[in] parent Data parent node instance of a schema node with @p ext instance. In special cases
+ * (when not working with data) it be NULL!
  * @param[in] user_data User-supplied callback data.
  * @param[out] ext_data Provided extension instance data.
  * @param[out] ext_data_free Whether the extension instance should free @p ext_data or not.
  * @return LY_ERR value.
  */
-typedef LY_ERR (*ly_ext_data_clb)(const struct lysc_ext_instance *ext, void *user_data, void **ext_data,
-        ly_bool *ext_data_free);
+typedef LY_ERR (*ly_ext_data_clb)(const struct lysc_ext_instance *ext, const struct lyd_node *parent, void *user_data,
+        void **ext_data, ly_bool *ext_data_free);
 
 /**
  * @brief Set callback providing run-time extension instance data. The expected data depend on the extension.
diff --git a/src/plugins_exts.c b/src/plugins_exts.c
index 2168c94566..a45fc5567f 100644
--- a/src/plugins_exts.c
+++ b/src/plugins_exts.c
@@ -675,7 +675,8 @@ lyplg_ext_parsed_get_storage(const struct lysc_ext_instance *ext, int stmt, uint
 }
 
 LIBYANG_API_DEF LY_ERR
-lyplg_ext_get_data(const struct ly_ctx *ctx, const struct lysc_ext_instance *ext, void **ext_data, ly_bool *ext_data_free)
+lyplg_ext_get_data(const struct ly_ctx *ctx, const struct lysc_ext_instance *ext, const struct lyd_node *parent,
+        void **ext_data, ly_bool *ext_data_free)
 {
     LY_ERR rc;
 
@@ -684,7 +685,7 @@ lyplg_ext_get_data(const struct ly_ctx *ctx, const struct lysc_ext_instance *ext
         return LY_EINVAL;
     }
 
-    if ((rc = ctx->ext_clb(ext, ctx->ext_clb_data, ext_data, ext_data_free))) {
+    if ((rc = ctx->ext_clb(ext, parent, ctx->ext_clb_data, ext_data, ext_data_free))) {
         lyplg_ext_compile_log(NULL, ext, LY_LLERR, rc, "Callback for getting ext data failed.");
     }
     return rc;
diff --git a/src/plugins_exts.h b/src/plugins_exts.h
index cbfc9d38d8..21db6e8e52 100644
--- a/src/plugins_exts.h
+++ b/src/plugins_exts.h
@@ -1012,13 +1012,14 @@ LIBYANG_API_DECL LY_ERR lyplg_ext_parsed_get_storage(const struct lysc_ext_insta
  *
  * @param[in] ctx Context with the callback.
  * @param[in] ext Compiled extension instance.
+ * @param[in] parent Data parent node instance of a schema node with @p ext instance.
  * @param[out] ext_data Provided extension instance data.
  * @param[out] ext_data_free Whether the extension instance should free @p ext_data or not.
  * @return LY_SUCCESS on success.
  * @return LY_ERR on error.
  */
-LIBYANG_API_DECL LY_ERR lyplg_ext_get_data(const struct ly_ctx *ctx, const struct lysc_ext_instance *ext, void **ext_data,
-        ly_bool *ext_data_free);
+LIBYANG_API_DECL LY_ERR lyplg_ext_get_data(const struct ly_ctx *ctx, const struct lysc_ext_instance *ext,
+        const struct lyd_node *parent, void **ext_data, ly_bool *ext_data_free);
 
 /**
  * @brief Insert extension instance data into a parent.
@@ -1034,20 +1035,24 @@ LIBYANG_API_DECL LY_ERR lyplg_ext_insert(struct lyd_node *parent, struct lyd_nod
  * @brief Expand parent-reference xpath expressions
  *
  * @param[in] ext Context allocated for extension.
+ * @param[in] parent Data parent node instance of a schema node with @p ext instance.
  * @param[out] refs Set of schema node matching parent-reference XPaths.
  * @return LY_ERR value.
  */
-LIBYANG_API_DECL LY_ERR lyplg_ext_schema_mount_get_parent_ref(const struct lysc_ext_instance *ext, struct ly_set **refs);
+LIBYANG_API_DECL LY_ERR lyplg_ext_schema_mount_get_parent_ref(const struct lysc_ext_instance *ext,
+        const struct lyd_node *parent, struct ly_set **refs);
 
 /**
  * @brief Allocate a new context for a particular instance of the yangmnt:mount-point extension.
  * Caller is responsible for **freeing** the created context.
  *
  * @param[in] ext Compiled extension instance.
+ * @param[in] parent Data parent node instance of a schema node with @p ext instance.
  * @param[out] ctx Context with modules loaded from the list found in the extension data.
  * @return LY_ERR value.
  */
-LIBYANG_API_DECL LY_ERR lyplg_ext_schema_mount_create_context(const struct lysc_ext_instance *ext, struct ly_ctx **ctx);
+LIBYANG_API_DECL LY_ERR lyplg_ext_schema_mount_create_context(const struct lysc_ext_instance *ext,
+        const struct lyd_node *parent, struct ly_ctx **ctx);
 
 /** @} pluginsExtensions */
 
diff --git a/src/plugins_exts/schema_mount.c b/src/plugins_exts/schema_mount.c
index e812053ef4..eb71ee4ee9 100644
--- a/src/plugins_exts/schema_mount.c
+++ b/src/plugins_exts/schema_mount.c
@@ -1,9 +1,10 @@
 /**
  * @file schema_mount.c
  * @author Tadeas Vintrlik <xvintr04@stud.fit.vutbr.cz>
+ * @author Michal Vasko <mvasko@cesnet.cz>
  * @brief libyang extension plugin - Schema Mount (RFC 8528)
  *
- * Copyright (c) 2021 CESNET, z.s.p.o.
+ * Copyright (c) 2021 - 2024 CESNET, z.s.p.o.
  *
  * This source code is licensed under BSD 3-Clause License (the "License").
  * You may not use this file except in compliance with the License.
@@ -628,11 +629,12 @@ schema_mount_get_ctx_inline(struct lysc_ext_instance *ext, const struct lyd_node
  * @brief Get schema (context) for a mount point.
  *
  * @param[in] ext Compiled extension instance.
+ * @param[in] parent Data parent node instance of a schema node with @p ext instance.
  * @param[out] ext_ctx Schema to use for parsing the data.
  * @return LY_ERR value.
  */
 static LY_ERR
-schema_mount_get_ctx(struct lysc_ext_instance *ext, const struct ly_ctx **ext_ctx)
+schema_mount_get_ctx(struct lysc_ext_instance *ext, const struct lyd_node *parent, const struct ly_ctx **ext_ctx)
 {
     LY_ERR ret = LY_SUCCESS, r;
     struct lyd_node *iter, *ext_data = NULL;
@@ -641,7 +643,7 @@ schema_mount_get_ctx(struct lysc_ext_instance *ext, const struct ly_ctx **ext_ct
     *ext_ctx = NULL;
 
     /* get operational data with ietf-yang-library and ietf-yang-schema-mount data */
-    if ((r = lyplg_ext_get_data(ext->module->ctx, ext, (void **)&ext_data, &ext_data_free))) {
+    if ((r = lyplg_ext_get_data(ext->module->ctx, ext, parent, (void **)&ext_data, &ext_data_free))) {
         ret = r;
         goto cleanup;
     }
@@ -693,7 +695,7 @@ schema_mount_snode(struct lysc_ext_instance *ext, const struct lyd_node *parent,
     const struct ly_ctx *ext_ctx = NULL;
 
     /* get context based on ietf-yang-library data */
-    if ((r = schema_mount_get_ctx(ext, &ext_ctx))) {
+    if ((r = schema_mount_get_ctx(ext, parent, &ext_ctx))) {
         return r;
     }
 
@@ -840,8 +842,9 @@ schema_mount_dup_parent_ref(const struct lysc_ext_instance *ext, const struct ly
     return ret;
 }
 
-LY_ERR
-lyplg_ext_schema_mount_get_parent_ref(const struct lysc_ext_instance *ext, struct ly_set **refs)
+LIBYANG_API_DEF LY_ERR
+lyplg_ext_schema_mount_get_parent_ref(const struct lysc_ext_instance *ext, const struct lyd_node *parent,
+        struct ly_set **refs)
 {
     LY_ERR rc;
     struct ly_set *pref_set = NULL;
@@ -851,7 +854,7 @@ lyplg_ext_schema_mount_get_parent_ref(const struct lysc_ext_instance *ext, struc
     ly_bool ext_data_free;
 
     /* get operational data with ietf-yang-library and ietf-yang-schema-mount data */
-    if ((rc = lyplg_ext_get_data(ext->module->ctx, ext, (void **)&ext_data, &ext_data_free))) {
+    if ((rc = lyplg_ext_get_data(ext->module->ctx, ext, parent, (void **)&ext_data, &ext_data_free))) {
         return rc;
     }
 
@@ -916,7 +919,7 @@ schema_mount_validate(struct lysc_ext_instance *ext, struct lyd_node *sibling, c
     }
 
     /* get operational data with ietf-yang-library and ietf-yang-schema-mount data */
-    if ((ret = lyplg_ext_get_data(ext->module->ctx, ext, (void **)&ext_data, &ext_data_free))) {
+    if ((ret = lyplg_ext_get_data(ext->module->ctx, ext, lyd_parent(sibling), (void **)&ext_data, &ext_data_free))) {
         goto cleanup;
     }
 
@@ -1062,7 +1065,8 @@ schema_mount_cfree(const struct ly_ctx *ctx, struct lysc_ext_instance *ext)
 }
 
 LIBYANG_API_DEF LY_ERR
-lyplg_ext_schema_mount_create_context(const struct lysc_ext_instance *ext, struct ly_ctx **ctx)
+lyplg_ext_schema_mount_create_context(const struct lysc_ext_instance *ext, const struct lyd_node *parent,
+        struct ly_ctx **ctx)
 {
     struct lyd_node *ext_data = NULL;
     ly_bool ext_data_free = 0, config;
@@ -1077,7 +1081,7 @@ lyplg_ext_schema_mount_create_context(const struct lysc_ext_instance *ext, struc
     }
 
     /* get operational data with ietf-yang-library and ietf-yang-schema-mount data */
-    if ((rc = lyplg_ext_get_data(ext->module->ctx, ext, (void **)&ext_data, &ext_data_free))) {
+    if ((rc = lyplg_ext_get_data(ext->module->ctx, ext, parent, (void **)&ext_data, &ext_data_free))) {
         return rc;
     }
 
@@ -1206,12 +1210,12 @@ schema_mount_sprinter_ctree(struct lysc_ext_instance *ext, const struct lyspr_tr
         return LY_SUCCESS;
     }
 
-    if (lyplg_ext_schema_mount_create_context(ext, &ext_ctx)) {
+    if (lyplg_ext_schema_mount_create_context(ext, NULL, &ext_ctx)) {
         /* Void mount point */
         return LY_SUCCESS;
     }
 
-    rc = lyplg_ext_schema_mount_get_parent_ref(ext, &refs);
+    rc = lyplg_ext_schema_mount_get_parent_ref(ext, NULL, &refs);
     LY_CHECK_GOTO(rc, cleanup);
 
     /* build new list of modules to print. This list will omit internal
diff --git a/src/tree_schema.c b/src/tree_schema.c
index 3877da11ea..ce713204a2 100644
--- a/src/tree_schema.c
+++ b/src/tree_schema.c
@@ -258,7 +258,7 @@ lys_getnext_(const struct lysc_node *last, const struct lysc_node *parent, const
                 LY_ARRAY_FOR(parent->exts, u) {
                     if (!strcmp(parent->exts[u].def->name, "mount-point") &&
                             !strcmp(parent->exts[u].def->module->name, "ietf-yang-schema-mount")) {
-                        lyplg_ext_schema_mount_create_context(&parent->exts[u], &sm_ctx);
+                        lyplg_ext_schema_mount_create_context(&parent->exts[u], NULL, &sm_ctx);
                         if (sm_ctx) {
                             /* some usable context created */
                             break;
diff --git a/tests/utests/extensions/test_schema_mount.c b/tests/utests/extensions/test_schema_mount.c
index f27e16821d..f324372be7 100644
--- a/tests/utests/extensions/test_schema_mount.c
+++ b/tests/utests/extensions/test_schema_mount.c
@@ -162,7 +162,8 @@ test_schema(void **state)
 }
 
 static LY_ERR
-test_ext_data_clb(const struct lysc_ext_instance *ext, void *user_data, void **ext_data, ly_bool *ext_data_free)
+test_ext_data_clb(const struct lysc_ext_instance *ext, const struct lyd_node *UNUSED(parent), void *user_data,
+        void **ext_data, ly_bool *ext_data_free)
 {
     void **state = glob_state;
     struct lyd_node *data = NULL;
diff --git a/tests/utests/schema/test_printer_tree.c b/tests/utests/schema/test_printer_tree.c
index 5438c6114b..591ed20816 100644
--- a/tests/utests/schema/test_printer_tree.c
+++ b/tests/utests/schema/test_printer_tree.c
@@ -1920,7 +1920,8 @@ yang_data(void **state)
 }
 
 static LY_ERR
-getter(const struct lysc_ext_instance *ext, void *user_data, void **ext_data, ly_bool *ext_data_free)
+getter(const struct lysc_ext_instance *ext, const struct lyd_node *UNUSED(parent), void *user_data, void **ext_data,
+        ly_bool *ext_data_free)
 {
     struct ly_ctx *ctx;
     struct lyd_node *data = NULL;
diff --git a/tools/lint/common.c b/tools/lint/common.c
index d86c54f1bb..a69ce83794 100644
--- a/tools/lint/common.c
+++ b/tools/lint/common.c
@@ -262,7 +262,8 @@ find_schema_path(const struct ly_ctx *ctx, const char *schema_path)
 }
 
 LY_ERR
-ext_data_clb(const struct lysc_ext_instance *ext, void *user_data, void **ext_data, ly_bool *ext_data_free)
+ext_data_clb(const struct lysc_ext_instance *ext, const struct lyd_node *UNUSED(parent), void *user_data,
+        void **ext_data, ly_bool *ext_data_free)
 {
     struct ly_ctx *ctx;
     struct lyd_node *data = NULL;
diff --git a/tools/lint/common.h b/tools/lint/common.h
index 7c50e7280e..8f3e8a1bf1 100644
--- a/tools/lint/common.h
+++ b/tools/lint/common.h
@@ -138,12 +138,14 @@ const struct lysc_node *find_schema_path(const struct ly_ctx *ctx, const char *s
  * @brief General callback providing run-time extension instance data.
  *
  * @param[in] ext Compiled extension instance.
+ * @param[in] parent Data aprent, unused.
  * @param[in] user_data User-supplied callback data.
  * @param[out] ext_data Provided extension instance data.
  * @param[out] ext_data_free Whether the extension instance should free @p ext_data or not.
  * @return LY_ERR value.
  */
-LY_ERR ext_data_clb(const struct lysc_ext_instance *ext, void *user_data, void **ext_data, ly_bool *ext_data_free);
+LY_ERR ext_data_clb(const struct lysc_ext_instance *ext, const struct lyd_node *parent, void *user_data,
+        void **ext_data, ly_bool *ext_data_free);
 
 /**
  * @brief Concatenation of paths into one string.