[rtems commit] dosfs: Remove fat_file_datasync()
Sebastian Huber
sebh at rtems.org
Fri May 11 11:57:21 UTC 2012
Module: rtems
Branch: master
Commit: 86ef0df976faf1b060347a07744814458aa42619
Changeset: http://git.rtems.org/rtems/commit/?id=86ef0df976faf1b060347a07744814458aa42619
Author: Sebastian Huber <sebastian.huber at embedded-brains.de>
Date: Wed May 9 14:33:51 2012 +0200
dosfs: Remove fat_file_datasync()
The fat_file_datasync() read every cluster of the file into the cache
and then synchronized it step-by-step. For unmodified buffers this is a
non-operation. For modified buffers this will wake-up the swapout task
which performs then a single buffer write operation. This is usually
quite inefficient. Firstly we do single buffer writes, secondly we
may perform a lot of unnecessary read operations (for huge files this is
really bad), and thirdly this leads likely to cache evictions.
The synchronization procedure is replaced by a simple
rtems_bdbuf_sync_dev(). This has the side-effect that also buffers not
related to the file are synchronized, but since the modified list is
normally short this should be acceptable.
---
cpukit/libfs/src/dosfs/fat_file.c | 59 -------
cpukit/libfs/src/dosfs/fat_file.h | 5 -
cpukit/libfs/src/dosfs/msdos.h | 4 +
cpukit/libfs/src/dosfs/msdos_dir.c | 31 ----
cpukit/libfs/src/dosfs/msdos_file.c | 116 ++++---------
cpukit/libfs/src/dosfs/msdos_handlers_dir.c | 4 +-
cpukit/libfs/src/dosfs/msdos_handlers_file.c | 2 +-
cpukit/libfs/src/dosfs/msdos_misc.c | 31 ++++
testsuites/fstests/Makefile.am | 1 +
testsuites/fstests/configure.ac | 1 +
testsuites/fstests/fsdosfssync01/Makefile.am | 19 +++
testsuites/fstests/fsdosfssync01/fsdosfssync01.doc | 11 ++
testsuites/fstests/fsdosfssync01/fsdosfssync01.scn | 2 +
testsuites/fstests/fsdosfssync01/init.c | 171 ++++++++++++++++++++
14 files changed, 278 insertions(+), 179 deletions(-)
diff --git a/cpukit/libfs/src/dosfs/fat_file.c b/cpukit/libfs/src/dosfs/fat_file.c
index a10347c..73ea076 100644
--- a/cpukit/libfs/src/dosfs/fat_file.c
+++ b/cpukit/libfs/src/dosfs/fat_file.c
@@ -774,65 +774,6 @@ fat_file_mark_removed(
fat_fd->flags |= FAT_FILE_REMOVED;
}
-/* fat_file_datasync --
- * Synchronize fat-file - flush all buffered data to the media.
- *
- * PARAMETERS:
- * mt_entry - mount table entry
- * fat_fd - fat-file descriptor
- *
- * RETURNS:
- * RC_OK on success, or -1 if error occured and errno set appropriately
- */
-int
-fat_file_datasync(
- rtems_filesystem_mount_table_entry_t *mt_entry,
- fat_file_fd_t *fat_fd
- )
-{
- int rc = RC_OK;
- rtems_status_code sc = RTEMS_SUCCESSFUL;
- fat_fs_info_t *fs_info = mt_entry->fs_info;
- uint32_t cur_cln = fat_fd->cln;
- rtems_bdbuf_buffer *block = NULL;
- uint32_t sec = 0;
- uint32_t i = 0;
-
- if (fat_fd->fat_file_size == 0)
- return RC_OK;
-
- /*
- * we can use only one bdbuf :( and we also know that cache is useless
- * for sync operation, so don't use it
- */
- rc = fat_buf_release(fs_info);
- if (rc != RC_OK)
- return rc;
-
- /* for each cluster of the file ... */
- while ((cur_cln & fs_info->vol.mask) < fs_info->vol.eoc_val)
- {
- sec = fat_cluster_num_to_sector_num(mt_entry, cur_cln);
- /* for each sector in cluster ... */
- for ( i = 0; i < fs_info->vol.spc; i++ )
- {
- /* ... sync it */
- sc = rtems_bdbuf_read(fs_info->vol.dd, (sec + i), &block);
- if (sc != RTEMS_SUCCESSFUL)
- rtems_set_errno_and_return_minus_one( EIO );
-
- sc = rtems_bdbuf_sync(block);
- if ( sc != RTEMS_SUCCESSFUL )
- rtems_set_errno_and_return_minus_one( EIO );
- }
-
- rc = fat_get_fat_cluster(mt_entry, cur_cln, &cur_cln);
- if ( rc != RC_OK )
- return rc;
- }
- return rc;
-}
-
/* fat_file_size --
* Calculate fat-file size - fat-file is nothing that clusters chain, so
* go through all clusters in the chain and count it. Only
diff --git a/cpukit/libfs/src/dosfs/fat_file.h b/cpukit/libfs/src/dosfs/fat_file.h
index 30614c8..3a338a5 100644
--- a/cpukit/libfs/src/dosfs/fat_file.h
+++ b/cpukit/libfs/src/dosfs/fat_file.h
@@ -168,11 +168,6 @@ fat_file_truncate(rtems_filesystem_mount_table_entry_t *mt_entry,
uint32_t new_length);
int
-fat_file_datasync(rtems_filesystem_mount_table_entry_t *mt_entry,
- fat_file_fd_t *fat_fd);
-
-
-int
fat_file_ioctl(rtems_filesystem_mount_table_entry_t *mt_entry,
fat_file_fd_t *fat_fd,
int cmd,
diff --git a/cpukit/libfs/src/dosfs/msdos.h b/cpukit/libfs/src/dosfs/msdos.h
index 0696b8f..409c418 100644
--- a/cpukit/libfs/src/dosfs/msdos.h
+++ b/cpukit/libfs/src/dosfs/msdos.h
@@ -399,6 +399,10 @@ int msdos_get_dotdot_dir_info_cluster_num_and_offset(
char *dir_entry
);
+int msdos_sync_unprotected(msdos_fs_info_t *fs_info);
+
+int msdos_sync(rtems_libio_t *iop);
+
#ifdef __cplusplus
}
#endif
diff --git a/cpukit/libfs/src/dosfs/msdos_dir.c b/cpukit/libfs/src/dosfs/msdos_dir.c
index 38ea667..8bd807d 100644
--- a/cpukit/libfs/src/dosfs/msdos_dir.c
+++ b/cpukit/libfs/src/dosfs/msdos_dir.c
@@ -457,34 +457,3 @@ msdos_dir_stat(
* RETURNS:
*
*/
-
-/* msdos_dir_sync --
- * The following routine does a syncronization on a MSDOS directory node.
- * DIR_WrtTime, DIR_WrtDate and DIR_fileSize fields of 32 Bytes Directory
- * Entry Structure should not be updated for directories, so only call
- * to corresponding fat-file routine.
- *
- * PARAMETERS:
- * iop - file control block
- *
- * RETURNS:
- * RC_OK on success, or -1 if error occured (errno set apropriately).
- */
-int
-msdos_dir_sync(rtems_libio_t *iop)
-{
- int rc = RC_OK;
- rtems_status_code sc = RTEMS_SUCCESSFUL;
- fat_file_fd_t *fat_fd = iop->pathinfo.node_access;
- msdos_fs_info_t *fs_info = iop->pathinfo.mt_entry->fs_info;
-
- sc = rtems_semaphore_obtain(fs_info->vol_sema, RTEMS_WAIT,
- MSDOS_VOLUME_SEMAPHORE_TIMEOUT);
- if (sc != RTEMS_SUCCESSFUL)
- rtems_set_errno_and_return_minus_one(EIO);
-
- rc = fat_file_datasync(iop->pathinfo.mt_entry, fat_fd);
-
- rtems_semaphore_release(fs_info->vol_sema);
- return rc;
-}
diff --git a/cpukit/libfs/src/dosfs/msdos_file.c b/cpukit/libfs/src/dosfs/msdos_file.c
index f68e44f..176ec8e 100644
--- a/cpukit/libfs/src/dosfs/msdos_file.c
+++ b/cpukit/libfs/src/dosfs/msdos_file.c
@@ -27,30 +27,11 @@
#include "msdos.h"
-/* msdos_file_close --
- * Close fat-file which correspondes to the file. If fat-file descriptor
- * which correspondes to the file is not marked "removed", synchronize
- * size, first cluster number, write time and date fields of the file.
- *
- * PARAMETERS:
- * iop - file control block
- *
- * RETURNS:
- * RC_OK, if file closed successfully, or -1 if error occured (errno set
- * appropriately)
- */
-int
-msdos_file_close(rtems_libio_t *iop)
+static int
+msdos_file_update(rtems_libio_t *iop)
{
- int rc = RC_OK;
- rtems_status_code sc = RTEMS_SUCCESSFUL;
- msdos_fs_info_t *fs_info = iop->pathinfo.mt_entry->fs_info;
- fat_file_fd_t *fat_fd = iop->pathinfo.node_access;
-
- sc = rtems_semaphore_obtain(fs_info->vol_sema, RTEMS_WAIT,
- MSDOS_VOLUME_SEMAPHORE_TIMEOUT);
- if (sc != RTEMS_SUCCESSFUL)
- rtems_set_errno_and_return_minus_one(EIO);
+ int rc = RC_OK;
+ fat_file_fd_t *fat_fd = iop->pathinfo.node_access;
/*
* if fat-file descriptor is not marked as "removed", synchronize
@@ -61,25 +42,51 @@ msdos_file_close(rtems_libio_t *iop)
rc = msdos_set_first_cluster_num(iop->pathinfo.mt_entry, fat_fd);
if (rc != RC_OK)
{
- rtems_semaphore_release(fs_info->vol_sema);
return rc;
}
rc = msdos_set_file_size(iop->pathinfo.mt_entry, fat_fd);
if (rc != RC_OK)
{
- rtems_semaphore_release(fs_info->vol_sema);
return rc;
}
rc = msdos_set_dir_wrt_time_and_date(iop->pathinfo.mt_entry, fat_fd);
if (rc != RC_OK)
{
- rtems_semaphore_release(fs_info->vol_sema);
return rc;
}
}
+ return rc;
+}
+
+/* msdos_file_close --
+ * Close fat-file which correspondes to the file. If fat-file descriptor
+ * which correspondes to the file is not marked "removed", synchronize
+ * size, first cluster number, write time and date fields of the file.
+ *
+ * PARAMETERS:
+ * iop - file control block
+ *
+ * RETURNS:
+ * RC_OK, if file closed successfully, or -1 if error occured (errno set
+ * appropriately)
+ */
+int
+msdos_file_close(rtems_libio_t *iop)
+{
+ int rc = RC_OK;
+ rtems_status_code sc = RTEMS_SUCCESSFUL;
+ msdos_fs_info_t *fs_info = iop->pathinfo.mt_entry->fs_info;
+
+ sc = rtems_semaphore_obtain(fs_info->vol_sema, RTEMS_WAIT,
+ MSDOS_VOLUME_SEMAPHORE_TIMEOUT);
+ if (sc != RTEMS_SUCCESSFUL)
+ rtems_set_errno_and_return_minus_one(EIO);
+
+ rc = msdos_file_update(iop);
+
rtems_semaphore_release(fs_info->vol_sema);
return rc;
}
@@ -276,67 +283,14 @@ msdos_file_sync(rtems_libio_t *iop)
if (sc != RTEMS_SUCCESSFUL)
rtems_set_errno_and_return_minus_one(EIO);
- /* synchronize file data */
- rc = fat_file_datasync(iop->pathinfo.mt_entry, fat_fd);
+ rc = msdos_file_update(iop);
if (rc != RC_OK)
{
rtems_semaphore_release(fs_info->vol_sema);
return rc;
}
- /*
- * if fat-file descriptor is not marked "removed" - synchronize file
- * metadata
- */
- if (!FAT_FILE_IS_REMOVED(fat_fd))
- {
- rc = msdos_set_first_cluster_num(iop->pathinfo.mt_entry, fat_fd);
- if (rc != RC_OK)
- {
- rtems_semaphore_release(fs_info->vol_sema);
- return rc;
- }
- rc = msdos_set_file_size(iop->pathinfo.mt_entry, fat_fd);
- if (rc != RC_OK)
- {
- rtems_semaphore_release(fs_info->vol_sema);
- return rc;
- }
- rc = msdos_set_dir_wrt_time_and_date(iop->pathinfo.mt_entry, fat_fd);
- if (rc != RC_OK)
- {
- rtems_semaphore_release(fs_info->vol_sema);
- return rc;
- }
- }
-
- rtems_semaphore_release(fs_info->vol_sema);
- return RC_OK;
-}
-
-/* msdos_file_datasync --
- * Synchronize file - synchronize only file data (metadata is letf intact).
- *
- * PARAMETERS:
- * iop - file control block
- *
- * RETURNS:
- * RC_OK on success, or -1 if error occured (errno set appropriately)
- */
-int
-msdos_file_datasync(rtems_libio_t *iop)
-{
- rtems_status_code sc = RTEMS_SUCCESSFUL;
- fat_file_fd_t *fat_fd = iop->pathinfo.node_access;
- msdos_fs_info_t *fs_info = iop->pathinfo.mt_entry->fs_info;
-
- sc = rtems_semaphore_obtain(fs_info->vol_sema, RTEMS_WAIT,
- MSDOS_VOLUME_SEMAPHORE_TIMEOUT);
- if (sc != RTEMS_SUCCESSFUL)
- rtems_set_errno_and_return_minus_one(EIO);
-
- /* synchronize file data */
- fat_file_datasync(iop->pathinfo.mt_entry, fat_fd);
+ rc = msdos_sync_unprotected(fs_info);
rtems_semaphore_release(fs_info->vol_sema);
return RC_OK;
diff --git a/cpukit/libfs/src/dosfs/msdos_handlers_dir.c b/cpukit/libfs/src/dosfs/msdos_handlers_dir.c
index 8c7dcdc..7da9c1e 100644
--- a/cpukit/libfs/src/dosfs/msdos_handlers_dir.c
+++ b/cpukit/libfs/src/dosfs/msdos_handlers_dir.c
@@ -27,7 +27,7 @@ const rtems_filesystem_file_handlers_r msdos_dir_handlers = {
rtems_filesystem_default_lseek_directory,
msdos_dir_stat,
rtems_filesystem_default_ftruncate_directory,
- msdos_dir_sync,
- msdos_dir_sync,
+ msdos_sync,
+ msdos_sync,
rtems_filesystem_default_fcntl
};
diff --git a/cpukit/libfs/src/dosfs/msdos_handlers_file.c b/cpukit/libfs/src/dosfs/msdos_handlers_file.c
index 12cdaa0..e4494f8 100644
--- a/cpukit/libfs/src/dosfs/msdos_handlers_file.c
+++ b/cpukit/libfs/src/dosfs/msdos_handlers_file.c
@@ -28,6 +28,6 @@ const rtems_filesystem_file_handlers_r msdos_file_handlers = {
msdos_file_stat,
msdos_file_ftruncate,
msdos_file_sync,
- msdos_file_datasync,
+ msdos_sync,
rtems_filesystem_default_fcntl
};
diff --git a/cpukit/libfs/src/dosfs/msdos_misc.c b/cpukit/libfs/src/dosfs/msdos_misc.c
index d11bd83..511ac44 100644
--- a/cpukit/libfs/src/dosfs/msdos_misc.c
+++ b/cpukit/libfs/src/dosfs/msdos_misc.c
@@ -1646,3 +1646,34 @@ int msdos_find_node_by_cluster_num_in_fat_file(
}
return MSDOS_NAME_NOT_FOUND_ERR;
}
+
+int
+msdos_sync_unprotected(msdos_fs_info_t *fs_info)
+{
+ int rc = fat_buf_release(&fs_info->fat);
+ rtems_status_code sc = rtems_bdbuf_syncdev(fs_info->fat.vol.dd);
+ if (sc != RTEMS_SUCCESSFUL) {
+ errno = EIO;
+ rc = -1;
+ }
+
+ return rc;
+}
+
+int
+msdos_sync(rtems_libio_t *iop)
+{
+ int rc = RC_OK;
+ rtems_status_code sc = RTEMS_SUCCESSFUL;
+ msdos_fs_info_t *fs_info = iop->pathinfo.mt_entry->fs_info;
+
+ sc = rtems_semaphore_obtain(fs_info->vol_sema, RTEMS_WAIT,
+ MSDOS_VOLUME_SEMAPHORE_TIMEOUT);
+ if (sc != RTEMS_SUCCESSFUL)
+ rtems_set_errno_and_return_minus_one(EIO);
+
+ rc = msdos_sync_unprotected(fs_info);
+
+ rtems_semaphore_release(fs_info->vol_sema);
+ return rc;
+}
diff --git a/testsuites/fstests/Makefile.am b/testsuites/fstests/Makefile.am
index f765a89..4383276 100644
--- a/testsuites/fstests/Makefile.am
+++ b/testsuites/fstests/Makefile.am
@@ -5,6 +5,7 @@
ACLOCAL_AMFLAGS = -I ../aclocal
SUBDIRS =
+SUBDIRS += fsdosfssync01
SUBDIRS += imfs_fserror
SUBDIRS += imfs_fslink
SUBDIRS += imfs_fspatheval
diff --git a/testsuites/fstests/configure.ac b/testsuites/fstests/configure.ac
index 833a85c..ccf9ee0 100644
--- a/testsuites/fstests/configure.ac
+++ b/testsuites/fstests/configure.ac
@@ -79,6 +79,7 @@ AC_CHECK_SIZEOF([blkcnt_t])
# Explicitly list all Makefiles here
AC_CONFIG_FILES([Makefile
+fsdosfssync01/Makefile
imfs_fserror/Makefile
imfs_fslink/Makefile
imfs_fspatheval/Makefile
diff --git a/testsuites/fstests/fsdosfssync01/Makefile.am b/testsuites/fstests/fsdosfssync01/Makefile.am
new file mode 100644
index 0000000..eb557f1
--- /dev/null
+++ b/testsuites/fstests/fsdosfssync01/Makefile.am
@@ -0,0 +1,19 @@
+rtems_tests_PROGRAMS = fsdosfssync01
+fsdosfssync01_SOURCES = init.c
+
+dist_rtems_tests_DATA = fsdosfssync01.scn fsdosfssync01.doc
+
+include $(RTEMS_ROOT)/make/custom/@RTEMS_BSP at .cfg
+include $(top_srcdir)/../automake/compile.am
+include $(top_srcdir)/../automake/leaf.am
+
+AM_CPPFLAGS += -I$(top_srcdir)/../support/include
+
+LINK_OBJS = $(fsdosfssync01_OBJECTS)
+LINK_LIBS = $(fsdosfssync01_LDLIBS)
+
+fsdosfssync01$(EXEEXT): $(fsdosfssync01_OBJECTS) $(fsdosfssync01_DEPENDENCIES)
+ @rm -f fsdosfssync01$(EXEEXT)
+ $(make-exe)
+
+include $(top_srcdir)/../automake/local.am
diff --git a/testsuites/fstests/fsdosfssync01/fsdosfssync01.doc b/testsuites/fstests/fsdosfssync01/fsdosfssync01.doc
new file mode 100644
index 0000000..98b558a
--- /dev/null
+++ b/testsuites/fstests/fsdosfssync01/fsdosfssync01.doc
@@ -0,0 +1,11 @@
+This file describes the directives and concepts tested by this test set.
+
+test set name: fsdosfssync01
+
+directives:
+
+ TBD
+
+concepts:
+
+ TBD
diff --git a/testsuites/fstests/fsdosfssync01/fsdosfssync01.scn b/testsuites/fstests/fsdosfssync01/fsdosfssync01.scn
new file mode 100644
index 0000000..c181dbf
--- /dev/null
+++ b/testsuites/fstests/fsdosfssync01/fsdosfssync01.scn
@@ -0,0 +1,2 @@
+*** TEST FSDOSFSSYNC 1 ***
+*** END OF TEST FSDOSFSSYNC 1 ***
diff --git a/testsuites/fstests/fsdosfssync01/init.c b/testsuites/fstests/fsdosfssync01/init.c
new file mode 100644
index 0000000..72481b2
--- /dev/null
+++ b/testsuites/fstests/fsdosfssync01/init.c
@@ -0,0 +1,171 @@
+/*
+ * Copyright (c) 2012 embedded brains GmbH. All rights reserved.
+ *
+ * embedded brains GmbH
+ * Obere Lagerstr. 30
+ * 82178 Puchheim
+ * Germany
+ * <rtems at embedded-brains.de>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.com/license/LICENSE.
+ */
+
+#ifdef HAVE_CONFIG_H
+ #include "config.h"
+#endif
+
+#include "tmacros.h"
+
+#include <sys/stat.h>
+#include <errno.h>
+#include <string.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+#include <rtems/libio.h>
+#include <rtems/blkdev.h>
+#include <rtems/dosfs.h>
+#include <rtems/ramdisk.h>
+
+static void create_file(const char *file)
+{
+ int fd;
+ int rv;
+
+ fd = creat(file, S_IRWXU | S_IRWXG | S_IRWXO);
+ rtems_test_assert(fd >= 0);
+
+ rv = fsync(fd);
+ rtems_test_assert(rv == 0);
+
+ rv = close(fd);
+ rtems_test_assert(rv == 0);
+}
+
+static void write_to_file(const char *file, bool sync)
+{
+ int fd;
+ char buf [1];
+ ssize_t n;
+ off_t pos;
+ int rv;
+
+ fd = open(file, O_RDWR);
+ rtems_test_assert(fd >= 0);
+
+ n = write(fd, buf, sizeof(buf));
+ rtems_test_assert(n == (ssize_t) sizeof(buf));
+
+ pos = lseek(fd, 0, SEEK_END);
+ rtems_test_assert(pos == sizeof(buf));
+
+ if (sync) {
+ rv = fsync(fd);
+ rtems_test_assert(rv == 0);
+ }
+
+ rv = close(fd);
+ rtems_test_assert(rv == 0);
+}
+
+static void check_file_size(const char *file, off_t size)
+{
+ int fd;
+ off_t pos;
+ int rv;
+
+ fd = open(file, O_RDWR);
+ rtems_test_assert(fd >= 0);
+
+ pos = lseek(fd, 0, SEEK_END);
+ rtems_test_assert(pos == size);
+
+ rv = close(fd);
+ rtems_test_assert(rv == 0);
+}
+
+static void test(const char *rda, const char *mnt, const char *file)
+{
+ rtems_status_code sc;
+ int disk_fd;
+ int rv;
+
+ sc = rtems_disk_io_initialize();
+ rtems_test_assert(sc == RTEMS_SUCCESSFUL);
+
+ disk_fd = open(rda, O_RDWR);
+ rtems_test_assert(disk_fd >= 0);
+
+ rv = msdos_format(rda, NULL);
+ rtems_test_assert(rv == 0);
+
+ rv = mount_and_make_target_path(
+ rda,
+ mnt,
+ RTEMS_FILESYSTEM_TYPE_DOSFS,
+ RTEMS_FILESYSTEM_READ_WRITE,
+ NULL
+ );
+ rtems_test_assert(rv == 0);
+
+ create_file(file);
+ rv = rtems_disk_fd_purge(disk_fd);
+ rtems_test_assert(rv == 0);
+
+ write_to_file(file, false);
+ rv = rtems_disk_fd_purge(disk_fd);
+ rtems_test_assert(rv == 0);
+ check_file_size(file, 0);
+
+ write_to_file(file, true);
+ rv = rtems_disk_fd_purge(disk_fd);
+ rtems_test_assert(rv == 0);
+ check_file_size(file, 1);
+
+ rv = unmount(mnt);
+ rtems_test_assert(rv == 0);
+
+ rv = close(disk_fd);
+ rtems_test_assert(rv == 0);
+}
+
+static void Init(rtems_task_argument arg)
+{
+ puts("\n\n*** TEST FSDOSFSSYNC 1 ***");
+
+ test("/dev/rda", "/mnt", "/mnt/file");
+
+ puts("*** END OF TEST FSDOSFSSYNC 1 ***");
+
+ rtems_test_exit(0);
+}
+
+rtems_ramdisk_config rtems_ramdisk_configuration [] = {
+ { .block_size = 512, .block_num = 1024 }
+};
+
+size_t rtems_ramdisk_configuration_size = 1;
+
+#define CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER
+#define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER
+#define CONFIGURE_APPLICATION_EXTRA_DRIVERS RAMDISK_DRIVER_TABLE_ENTRY
+#define CONFIGURE_APPLICATION_NEEDS_LIBBLOCK
+
+#define CONFIGURE_LIBIO_MAXIMUM_FILE_DESCRIPTORS 6
+
+#define CONFIGURE_USE_IMFS_AS_BASE_FILESYSTEM
+
+#define CONFIGURE_FILESYSTEM_DOSFS
+
+#define CONFIGURE_MAXIMUM_TASKS 2
+
+#define CONFIGURE_EXTRA_TASK_STACKS (8 * 1024)
+
+#define CONFIGURE_RTEMS_INIT_TASKS_TABLE
+
+#define CONFIGURE_INIT
+
+#include <rtems/confdefs.h>
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