feat(storage/vfs): Make lwip specific API private

components/lwip/port/esp32xx/vfs_lwip.c

@@ -13,6 +13,7 @@
 #include <sys/select.h>
 #include "esp_attr.h"
 #include "esp_vfs.h"
+#include "esp_private/socket.h"
 #include "sdkconfig.h"
 #include "lwip/sockets.h"
 #include "lwip/sys.h"

components/vfs/include/esp_private/socket.h

@@ -0,0 +1,34 @@
+/*
+ * SPDX-FileCopyrightText: 2025 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#pragma once
+
+#include "esp_vfs.h"
+#include "esp_err.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * Special case function for registering a VFS that uses a method other than
+ * open() to open new file descriptors from the interval <min_fd; max_fd).
+ *
+ * This is a special-purpose function intended for registering LWIP sockets to VFS.
+ *
+ * @param vfs Pointer to esp_vfs_fs_ops_t. Meaning is the same as for esp_vfs_register_fs().
+ * @param ctx Pointer to context structure. Meaning is the same as for esp_vfs_register_fs().
+ * @param min_fd The smallest file descriptor this VFS will use.
+ * @param max_fd Upper boundary for file descriptors this VFS will use (the biggest file descriptor plus one).
+ *
+ * @return  ESP_OK if successful,
+ *          ESP_ERR_NO_MEM if too many VFSes are registered,
+ *          ESP_ERR_INVALID_ARG if the file descriptor boundaries are incorrect.
+ */
+esp_err_t esp_vfs_register_fd_range(const esp_vfs_fs_ops_t *vfs, int flags, void *ctx, int min_fd, int max_fd);
+
+#ifdef __cplusplus
+}
+#endif

components/vfs/include/esp_vfs.h

@@ -275,23 +275,6 @@ typedef struct
  */
 esp_err_t esp_vfs_register(const char* base_path, const esp_vfs_t* vfs, void* ctx);
 
-/**
- * Special case function for registering a VFS that uses a method other than
- * open() to open new file descriptors from the interval <min_fd; max_fd).
- *
- * This is a special-purpose function intended for registering LWIP sockets to VFS.
- *
- * @param vfs Pointer to esp_vfs_t. Meaning is the same as for esp_vfs_register().
- * @param ctx Pointer to context structure. Meaning is the same as for esp_vfs_register().
- * @param min_fd The smallest file descriptor this VFS will use.
- * @param max_fd Upper boundary for file descriptors this VFS will use (the biggest file descriptor plus one).
- *
- * @return  ESP_OK if successful, ESP_ERR_NO_MEM if too many VFSes are
- *          registered, ESP_ERR_INVALID_ARG if the file descriptor boundaries
- *          are incorrect.
- */
-esp_err_t esp_vfs_register_fd_range(const esp_vfs_fs_ops_t *vfs, int flags, void *ctx, int min_fd, int max_fd);
-
 /**
  * Special case function for registering a VFS that uses a method other than
  * open() to open new file descriptors. In comparison with

components/vfs/test_apps/main/test_vfs_fd.c

@@ -15,6 +15,7 @@
 #include "freertos/task.h"
 #include "freertos/semphr.h"
 #include "esp_vfs.h"
+#include "esp_private/socket.h"
 #include "unity.h"
 #include "esp_log.h"
 #include "test_utils.h"

components/vfs/vfs.c

@@ -19,7 +19,7 @@
 #include "freertos/semphr.h"
 #include "esp_vfs.h"
 #include "esp_vfs_private.h"
-#include "include/esp_vfs.h"
+#include "esp_private/socket.h"
 #include "sdkconfig.h"
 
 // Warn about using deprecated option

components/vfs/vfs_calls.c

@@ -19,6 +19,7 @@
 #include "freertos/semphr.h"
 #include "esp_log.h"
 #include "esp_vfs.h"
+#include "esp_private/socket.h"
 #include "esp_vfs_private.h"
 #include "esp_vfs_utils.h"
 #include "sdkconfig.h"