143 lines
4.2 KiB
C
143 lines
4.2 KiB
C
/****************************************************************************
|
|
* fs/vfs/fs_fsync.c
|
|
*
|
|
* Copyright (C) 2007-2009, 2013-2014, 2016-2017 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/sched.h>
|
|
#include <nuttx/cancelpt.h>
|
|
#include <nuttx/fs/fs.h>
|
|
|
|
#include "inode/inode.h"
|
|
|
|
#ifndef CONFIG_DISABLE_MOUNTPOINT
|
|
|
|
/****************************************************************************
|
|
* 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)
|
|
{
|
|
struct inode *inode;
|
|
|
|
/* Was this file opened for write access? */
|
|
|
|
if ((filep->f_oflags & O_WROK) == 0)
|
|
{
|
|
return -EBADF;
|
|
}
|
|
|
|
/* 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)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Yes, then tell the mountpoint to sync this file */
|
|
|
|
return inode->u.i_mops->sync(filep);
|
|
}
|
|
|
|
/****************************************************************************
|
|
* 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 = fs_getfilep(fd, &filep);
|
|
if (ret < 0)
|
|
{
|
|
goto errout;
|
|
}
|
|
|
|
DEBUGASSERT(filep != NULL);
|
|
|
|
/* Perform the fsync operation */
|
|
|
|
ret = file_fsync(filep);
|
|
if (ret < 0)
|
|
{
|
|
goto errout;
|
|
}
|
|
|
|
leave_cancellation_point();
|
|
return ret;
|
|
|
|
errout:
|
|
leave_cancellation_point();
|
|
set_errno(-ret);
|
|
return ERROR;
|
|
}
|
|
|
|
#endif /* !CONFIG_DISABLE_MOUNTPOINT */
|