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/****************************************************************************
* fs/vfs/fs_fsync.c
*
* Copyright (C) 2007-2009, 2013-2014 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <assert.h>
#include <nuttx/fs/fs.h>
#include <nuttx/sched.h>
#include "inode/inode.h"
#ifndef CONFIG_DISABLE_MOUNTPOINT
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Variables
****************************************************************************/
/****************************************************************************
* Public Variables
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* 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. Currently used
* only by aio_fsync();
*
****************************************************************************/
int file_fsync(FAR struct file *filep)
{
struct inode *inode;
int ret;
/* Was this file opened for write access? */
if ((filep->f_oflags & O_WROK) == 0)
{
ret = EBADF;
goto errout;
}
/* 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 || !INODE_IS_MOUNTPT(inode) ||
!inode->u.i_mops || !inode->u.i_mops->sync)
{
ret = EINVAL;
goto errout;
}
/* Yes, then tell the mountpoint to sync this file */
ret = inode->u.i_mops->sync(filep);
if (ret >= 0)
{
return OK;
}
ret = -ret;
errout:
set_errno(ret);
return ERROR;
}
/****************************************************************************
* Name: fsync
*
* Description:
* This func simply binds inode sync methods to the sync system call.
*
****************************************************************************/
int fsync(int fd)
{
FAR struct file *filep;
/* Get the file structure corresponding to the file descriptor. */
filep = fs_getfilep(fd);
if (!filep)
{
/* The errno value has already been set */
return ERROR;
}
/* Perform the fsync operation */
return file_fsync(filep);
}
#endif /* !CONFIG_DISABLE_MOUNTPOINT */
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