/****************************************************************************
 * fs/driver/fs_closeblockdriver.c
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.  The
 * ASF licenses this file to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the
 * License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations
 * under the License.
 *
 ****************************************************************************/

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include "fs/driver.h"
#include "vfs_config.h"
#include "errno.h"
#include "vnode.h"
#include "disk.h"

/****************************************************************************
 * Public Functions
 ****************************************************************************/

/****************************************************************************
 * Name: close_blockdriver
 *
 * Description:
 *   Call the close method and release the vnode
 *
 * Input Parameters:
 *   vnode - reference to the vnode of a block driver opened by open_blockdriver
 *
 * Returned Value:
 *   Returns zero on success or a negated errno on failure:
 *
 *   EINVAL  - vnode is NULL
 *   ENOTBLK - The vnode is not a block driver
 *
 ****************************************************************************/

int close_blockdriver(struct Vnode *vnode_ptr)
{
  int ret = 0; /* Assume success */
  los_part *part = NULL;
  los_disk *disk = NULL;
  struct block_operations *bop = NULL;

  /* Sanity checks */

  if (vnode_ptr == NULL || vnode_ptr->data == NULL)
    {
      ret = -EINVAL;
      goto errout;
    }

  bop = (struct block_operations*)(((struct drv_data*)vnode_ptr->data)->ops);

  if (bop == NULL) {
      PRINT_ERR("vnode ops is null, not a valid block driver\n");
      ret = -EINVAL;
      goto errout;
  }

  /* Verify that the vnode is a block driver. */

  if (vnode_ptr->type != VNODE_TYPE_BLK)
    {
      PRINT_ERR("vnode is not a block driver\n");
      ret = -ENOTBLK;
      goto errout;
    }


  part = los_part_find(vnode_ptr);
  if (part != NULL)
    {
      disk = get_disk(part->disk_id);
      if (disk == NULL)
        {
          ret = -EINVAL;
          goto errout;
        }

      if (pthread_mutex_lock(&disk->disk_mutex) != ENOERR)
        {
          PRINT_ERR("%s %d, mutex lock fail!\n", __FUNCTION__, __LINE__);
          return -EAGAIN;
        }

      if (disk->disk_status == STAT_INUSED)
        {
          /* Close the block driver.  Not that no mutually exclusive access
          * to the driver is enforced here.  That must be done in the driver
          * if needed.
          */

          if (bop->close != NULL)
            {
              ret = bop->close(vnode_ptr);
            }
        }

      if (pthread_mutex_unlock(&disk->disk_mutex) != ENOERR)
        {
          PRINT_ERR("%s %d, mutex unlock fail!\n", __FUNCTION__, __LINE__);
        }

    }
  else
    {
      if (bop->close != NULL)
        {
          ret = bop->close(vnode_ptr);
        }
    }

errout:
  return ret;
}