Merge branch 'contrib/github_pr_10987' into 'master'

Allow to config the maximum number of VFS entries. (GitHub PR)

Closes IDFGH-9641

See merge request espressif/esp-idf!23171

components/vfs/Kconfig

@@ -71,6 +71,14 @@ menu "Virtual file system"
         help
             Disabling this option can save memory when the support for termios.h is not required.
 
+    config VFS_MAX_COUNT
+        int "Maximum Number of Virtual Filesystems"
+        default 8
+        range 1 20
+        depends on VFS_SUPPORT_IO
+        help
+            Define maximum number of virtual filesystems that can be registered.
+
 
     menu "Host File System I/O (Semihosting)"
         depends on VFS_SUPPORT_IO

components/vfs/vfs.c

@@ -33,7 +33,16 @@
 
 static const char *TAG = "vfs";
 
-#define VFS_MAX_COUNT   8   /* max number of VFS entries (registered filesystems) */
+/* Max number of VFS entries (registered filesystems) */
+#ifdef CONFIG_VFS_MAX_COUNT
+#define VFS_MAX_COUNT  CONFIG_VFS_MAX_COUNT
+#else
+/* If IO support is disabled, keep this defined to 1 to avoid compiler warnings in this file.
+ * The s_vfs array and the functions defined here will be removed by the linker, anyway.
+ */
+#define VFS_MAX_COUNT 1
+#endif
+
 #define LEN_PATH_PREFIX_IGNORED SIZE_MAX /* special length value for VFS which is never recognised by open() */
 #define FD_TABLE_ENTRY_UNUSED   (fd_table_t) { .permanent = false, .has_pending_close = false, .has_pending_select = false, .vfs_index = -1, .local_fd = -1 }