/* 
   Unix SMB/CIFS implementation.

   POSIX NTVFS backend - flush

   Copyright (C) Andrew Tridgell 2004

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "include/includes.h"
#include "vfs_posix.h"

/*
  flush a single open file
*/
static void pvfs_flush_file(struct pvfs_state *pvfs, struct pvfs_file *f)
{
	if (pvfs->flags & PVFS_FLAG_STRICT_SYNC) {
		fsync(f->fd);
	}
}

/*
  flush a fnum
*/
NTSTATUS pvfs_flush(struct ntvfs_module_context *ntvfs,
		    struct smbsrv_request *req, struct smb_flush *io)
{
	struct pvfs_state *pvfs = ntvfs->private_data;
	struct pvfs_file *f;

	if (io->in.fnum != 0xFFFF) {
		f = pvfs_find_fd(pvfs, req, io->in.fnum);
		if (!f) {
			return NT_STATUS_INVALID_HANDLE;
		}
		pvfs_flush_file(pvfs, f);
		return NT_STATUS_OK;
	}

	if (!(pvfs->flags & PVFS_FLAG_STRICT_SYNC)) {
		return NT_STATUS_OK;
	}

	/* they are asking to flush all open files */
	for (f=pvfs->open_files;f;f=f->next) {
		pvfs_flush_file(pvfs, f);
	}

	return NT_STATUS_OK;
}