src/rfs/rtems-rfs-buffer-bdbuf.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup rtems_rfs
0007  *
0008  * @brief RTEMS File Systems Buffer Routines
0009  *
0010  * RTEMS File Systems Buffer Routines for the RTEMS libblock BD buffer cache.
0011  *
0012  */
0013
0014 /*
0015  *  COPYRIGHT (c) 2010 Chris Johns <chrisj@rtems.org>
0016  *
0017  * Redistribution and use in source and binary forms, with or without
0018  * modification, are permitted provided that the following conditions
0019  * are met:
0020  * 1. Redistributions of source code must retain the above copyright
0021  *    notice, this list of conditions and the following disclaimer.
0022  * 2. Redistributions in binary form must reproduce the above copyright
0023  *    notice, this list of conditions and the following disclaimer in the
0024  *    documentation and/or other materials provided with the distribution.
0025  *
0026  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0027  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0028  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0029  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0030  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0031  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0032  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0033  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0034  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0035  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0036  * POSSIBILITY OF SUCH DAMAGE.
0037  */
0038
0039 #ifdef HAVE_CONFIG_H
0040 #include "config.h"
0041 #endif
0042
0043 #include <inttypes.h>
0044 #include <errno.h>
0045
0046 #include <rtems/rfs/rtems-rfs-buffer.h>
0047 #include <rtems/rfs/rtems-rfs-file-system.h>
0048
0049 #if RTEMS_RFS_USE_LIBBLOCK
0050
0051 /**
0052  * Show errors.
0053  */
0054 #define RTEMS_RFS_BUFFER_ERRORS 0
0055
0056 int
0057 rtems_rfs_buffer_bdbuf_request (rtems_rfs_file_system*   fs,
0058                                 rtems_rfs_buffer_block   block,
0059                                 bool                     read,
0060                                 rtems_rfs_buffer**       buffer)
0061 {
0062   rtems_status_code sc;
0063   int               rc = 0;
0064
0065   if (read)
0066     sc = rtems_bdbuf_read (rtems_rfs_fs_device (fs), block, buffer);
0067   else
0068     sc = rtems_bdbuf_get (rtems_rfs_fs_device (fs), block, buffer);
0069
0070   if (sc != RTEMS_SUCCESSFUL)
0071   {
0072 #if RTEMS_RFS_BUFFER_ERRORS
0073     printf ("rtems-rfs: buffer-bdbuf-request: block=%lu: bdbuf-%s: %d: %s\n",
0074             block, read ? "read" : "get", sc, rtems_status_text (sc));
0075 #endif
0076     rc = EIO;
0077   }
0078
0079   return rc;
0080 }
0081
0082 int
0083 rtems_rfs_buffer_bdbuf_release (rtems_rfs_buffer* buffer,
0084                                 bool              modified)
0085 {
0086   rtems_status_code sc;
0087   int               rc = 0;
0088
0089   if (rtems_rfs_trace (RTEMS_RFS_TRACE_BUFFER_RELEASE))
0090     printf ("rtems-rfs: bdbuf-release: block=%" PRIuPTR " bdbuf=%" PRIu32 " %s\n",
0091             ((intptr_t) buffer->user),
0092             buffer->block, modified ? "(modified)" : "");
0093
0094   if (modified)
0095     sc = rtems_bdbuf_release_modified (buffer);
0096   else
0097     sc = rtems_bdbuf_release (buffer);
0098
0099   if (sc != RTEMS_SUCCESSFUL)
0100   {
0101 #if RTEMS_RFS_BUFFER_ERRORS
0102     printf ("rtems-rfs: buffer-release: bdbuf-%s: %s(%d)\n",
0103             modified ? "modified" : "not-modified",
0104             rtems_status_text (sc), sc);
0105 #endif
0106     rc = EIO;
0107   }
0108
0109   return rc;
0110 }
0111
0112 #endif