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132/****************************************************************************
* fs/vfs/fs_fsync.c
*
* SPDX-License-Identifier: Apache-2.0
*
* 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 <nuttx/config.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <assert.h>
#include <nuttx/sched.h>
#include <nuttx/cancelpt.h>
#include <nuttx/fs/fs.h>
#include <nuttx/fs/ioctl.h>
#include "inode/inode.h"
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: file_fsync
*
* Description:
* Equivalent to the standard fsync() function except that is accepts a
* struct file instance instead of a file descriptor and it does not set
* the errno variable.
*
****************************************************************************/
int file_fsync(FAR struct file *filep)
{
FAR struct inode *inode;
int ret;
/* Is this inode a registered mountpoint? Does it support the
* sync operations may be relevant to device drivers but only
* the mountpoint operations vtable contains a sync method.
*/
inode = filep->f_inode;
if (inode != NULL)
{
#ifndef CONFIG_DISABLE_MOUNTPOINT
if (INODE_IS_MOUNTPT(inode))
{
if (inode->u.i_mops && inode->u.i_mops->sync)
{
/* Yes, then tell the mountpoint to sync this file */
return inode->u.i_mops->sync(filep);
}
}
else
#endif
if (inode->u.i_ops && inode->u.i_ops->ioctl)
{
ret = inode->u.i_ops->ioctl(filep, BIOC_FLUSH, 0);
return ret >= 0 ? 0 : ret;
}
}
return -EINVAL;
}
/****************************************************************************
* Name: fsync
*
* Description:
* This func simply binds inode sync methods to the sync system call.
*
****************************************************************************/
int fsync(int fd)
{
FAR struct file *filep;
int ret;
/* fsync() is a cancellation point */
enter_cancellation_point();
/* Get the file structure corresponding to the file descriptor. */
ret = file_get(fd, &filep);
if (ret < 0)
{
goto errout;
}
/* Perform the fsync operation */
ret = file_fsync(filep);
file_put(filep);
if (ret < 0)
{
goto errout;
}
leave_cancellation_point();
return ret;
errout:
leave_cancellation_point();
set_errno(-ret);
return ERROR;
}