fs/littlefs: Add to get the full path

Signed-off-by: zhouliang3 <zhouliang3@xiaomi.com>

fs/littlefs/lfs_vfs.c

@@ -29,6 +29,7 @@
 #include <string.h>
 
 #include <nuttx/fs/fs.h>
+#include <nuttx/fs/ioctl.h>
 #include <nuttx/kmalloc.h>
 #include <nuttx/mtd/mtd.h>
 #include <nuttx/mutex.h>
@@ -36,6 +37,7 @@
 #include <sys/stat.h>
 #include <sys/statfs.h>
 
+#include "inode/inode.h"
 #include "littlefs/lfs.h"
 #include "littlefs/lfs_util.h"
 
@@ -543,31 +545,69 @@ static off_t littlefs_seek(FAR struct file *filep, off_t offset, int whence)
 static int littlefs_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
 {
   FAR struct littlefs_mountpt_s *fs;
+  FAR struct littlefs_file_s *priv;
   FAR struct inode *inode;
   FAR struct inode *drv;
+  int ret;
 
   /* Recover our private data from the struct file instance */
 
+  priv  = filep->f_priv;
   inode = filep->f_inode;
   fs    = inode->i_private;
   drv   = fs->drv;
 
+  ret = nxmutex_lock(&fs->lock);
+  if (ret < 0)
+    {
+      return ret;
+    }
+
+  switch (cmd)
+    {
+      case FIOC_FILEPATH:
+        {
+          FAR char *path = (FAR char *)(uintptr_t)arg;
+          ret = inode_getpath(inode, path, PATH_MAX);
+          if (ret >= 0)
+            {
+              size_t len = strlen(path);
+              if (path[len - 1] != '/')
+                {
+                  path[len++] = '/';
+                }
+
+              ret = littlefs_convert_result(lfs_file_path(&fs->lfs,
+                                                          &priv->file,
+                                                          path + len,
+                                                          PATH_MAX - len));
+            }
+        }
+        break;
+
+      default:
+        {
           if (INODE_IS_MTD(drv))
             {
-      return MTD_IOCTL(drv->u.i_mtd, cmd, arg);
+              ret = MTD_IOCTL(drv->u.i_mtd, cmd, arg);
             }
           else
             {
               if (drv->u.i_bops->ioctl != NULL)
                 {
-          return drv->u.i_bops->ioctl(drv, cmd, arg);
+                  ret = drv->u.i_bops->ioctl(drv, cmd, arg);
                 }
               else
                 {
-          return -ENOTTY;
+                  ret = -ENOTTY;
                 }
             }
         }
+    }
+
+  nxmutex_unlock(&fs->lock);
+  return ret;
+}
 
 /****************************************************************************
  * Name: littlefs_sync