posix/src/aio_fsync.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup POSIX_AIO
0007  *
0008  * @brief Syncing of all Outstanding Asynchronous I/O Operations.
0009  */
0010
0011 /*
0012  *  Copyright 2010, Alin Rus <alin.codejunkie@gmail.com>
0013  *  Copyright 2024, Alessandro Nardin <ale.daluch@gmail.com>
0014  *
0015  *  COPYRIGHT (c) 1989-2011, 2024.
0016  *  On-Line Applications Research Corporation (OAR).
0017  *
0018  * Redistribution and use in source and binary forms, with or without
0019  * modification, are permitted provided that the following conditions
0020  * are met:
0021  * 1. Redistributions of source code must retain the above copyright
0022  *    notice, this list of conditions and the following disclaimer.
0023  * 2. Redistributions in binary form must reproduce the above copyright
0024  *    notice, this list of conditions and the following disclaimer in the
0025  *    documentation and/or other materials provided with the distribution.
0026  *
0027  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0028  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0029  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0030  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0031  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0032  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0033  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0034  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0035  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0036  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0037  * POSSIBILITY OF SUCH DAMAGE.
0038  */
0039
0040 #ifdef HAVE_CONFIG_H
0041 #include "config.h"
0042 #endif
0043
0044 #include <aio.h>
0045 #include <errno.h>
0046 #include <stdlib.h>
0047 #include <rtems/posix/aio_misc.h>
0048 #include <rtems/seterr.h>
0049
0050 /*
0051  * Coverity 1616108 reported that there is dead code based on checking
0052  * both O_DSYNC and O_SYNC when they have the same value. Adding this
0053  * #error so if they ever are not equal, we will immediately know and
0054  * fix the code. It now assumes they are equal.
0055  */
0056 #if (O_DSYNC != O_SYNC)
0057   #error "Implementation assumes O_DSYNC == O_SYNC. Update if this changes."
0058 #endif
0059
0060 int aio_fsync(
0061   int            op,
0062   struct aiocb  *aiocbp
0063 )
0064 {
0065   rtems_aio_request *req;
0066   int mode;
0067
0068
0069   if ( 1 + atomic_load( &aio_request_queue.queued_requests ) > RTEMS_AIO_MAX ) {
0070     rtems_set_errno_and_return_minus_one( EAGAIN );
0071   }
0072
0073   if ( aiocbp == NULL )
0074     rtems_set_errno_and_return_minus_one( EINVAL );
0075
0076   /*
0077    * If O_SYNC != O_DSYNC, then this code needs to check for each individually.
0078    */
0079   if ( op != O_DSYNC )
0080     rtems_set_errno_and_return_minus_one( EINVAL );
0081
0082   if ( rtems_aio_check_sigevent( &aiocbp->aio_sigevent ) == 0 )
0083     rtems_set_errno_and_return_minus_one( EINVAL );
0084
0085   mode = fcntl( aiocbp->aio_fildes, F_GETFL );
0086   if (
0087     !(
0088       ((mode & O_ACCMODE) == O_WRONLY) ||
0089       ((mode & O_ACCMODE) == O_RDWR)
0090     )
0091   )
0092     rtems_set_errno_and_return_minus_one( EBADF );
0093
0094   req = (rtems_aio_request *) calloc( 1, sizeof( *req ) );
0095   if ( req == NULL )
0096     rtems_set_errno_and_return_minus_one( EAGAIN );
0097
0098   /*
0099    * If O_SYNC != O_DSYNC, then this code needs to check for each individually.
0100    */
0101   req->aiocbp = aiocbp;
0102   req->op_type = AIO_OP_SYNC;
0103   req->listcbp = NULL;
0104
0105   return rtems_aio_enqueue( req );
0106 }
0107