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 /* SPDX-License-Identifier: BSD-2-Clause */
 
 /*
  * Copyright (c) 2012 embedded brains GmbH & Co. KG
  *
  * 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.
  *
  * 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.
  */
 
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
 #include "tmacros.h"
 #include <fcntl.h>
 #include <rtems/dosfs.h>
 #include <rtems/sparse-disk.h>
 #include <rtems/blkdev.h>
 #include <bsp.h>
 
 const char rtems_test_name[] = "FSDOSFSWRITE 1";
 
 #define MAX_PATH_LENGTH 100 /* Maximum number of characters per path */
 #define SECTOR_SIZE 512 /* sector size (bytes) */
 #define FAT16_MAX_CLN 65525 /* maximum + 1 number of clusters for FAT16 */
 #define FAT16_DEFAULT_SECTORS_PER_CLUSTER 32 /* Default number of sectors per cluster for FAT16 */
 #define SECTORS_PER_CLUSTER 2
 
 static void format_and_mount( const char *dev_name, const char *mount_dir )
 {
   static const msdos_format_request_param_t rqdata = {
     .sectors_per_cluster = SECTORS_PER_CLUSTER,
     .quick_format        = true
   };
 
   int                                       rv;
 
 
   rv = msdos_format( dev_name, &rqdata );
   rtems_test_assert( rv == 0 );
 
   rv = mount( dev_name,
               mount_dir,
               RTEMS_FILESYSTEM_TYPE_DOSFS,
               RTEMS_FILESYSTEM_READ_WRITE,
               NULL );
   rtems_test_assert( rv == 0 );
 }
 
 static void do_fsync( const char *file )
 {
   int rv;
   int fd;
 
 
   fd = open( file, O_RDONLY );
   rtems_test_assert( fd >= 0 );
 
   rv = fsync( fd );
   rtems_test_assert( rv == 0 );
 
   rv = close( fd );
   rtems_test_assert( rv == 0 );
 }
 
 static void check_block_stats( const char *dev_name,
   const char                              *mount_dir,
   const rtems_blkdev_stats                *expected_stats )
 {
   int                fd;
   int                rv;
   rtems_blkdev_stats actual_stats;
 
 
   do_fsync( mount_dir );
 
   fd = open( dev_name, O_RDONLY );
   rtems_test_assert( fd >= 0 );
 
   rv = ioctl( fd, RTEMS_BLKIO_GETDEVSTATS, &actual_stats );
   rtems_test_assert( rv == 0 );
   rtems_test_assert( memcmp( &actual_stats, expected_stats,
                              sizeof( actual_stats ) ) == 0 );
 
   rv = close( fd );
   rtems_test_assert( rv == 0 );
 }
 
 static void reset_block_stats( const char *dev_name, const char *mount_dir )
 {
   int fd;
   int rv;
 
 
   do_fsync( mount_dir );
 
   fd = open( dev_name, O_RDONLY );
   rtems_test_assert( fd >= 0 );
 
   rv = ioctl( fd, RTEMS_BLKIO_PURGEDEV );
   rtems_test_assert( rv == 0 );
 
   rv = ioctl( fd, RTEMS_BLKIO_RESETDEVSTATS );
   rtems_test_assert( rv == 0 );
 
   rv = close( fd );
   rtems_test_assert( rv == 0 );
 }
 
 static int create_file( const char *file_name )
 {
   mode_t mode = S_IRWXU | S_IRWXG | S_IRWXO;
 
 
   return creat( file_name, mode );
 }
 
 static void test_normal_file_write(
   const char *dev_name,
   const char *mount_dir,
   const char *file_name )
 {
   static const rtems_blkdev_stats complete_existing_block_stats = {
     .read_hits            = 0,
     .read_misses          = 0,
     .read_ahead_transfers = 0,
     .read_ahead_peeks     = 0,
     .read_blocks          = 0,
     .read_errors          = 0,
     .write_transfers      = 1,
     .write_blocks         = 1,
     .write_errors         = 0
   };
   static const rtems_blkdev_stats complete_new_block_stats = {
     .read_hits            = 3,
     .read_misses          = 2,
     .read_ahead_transfers = 0,
     .read_ahead_peeks     = 0,
     .read_blocks          = 2,
     .read_errors          = 0,
     .write_transfers      = 1,
     .write_blocks         = 3,
     .write_errors         = 0
   };
   static const rtems_blkdev_stats partial_new_block_stats = {
     .read_hits            = 3,
     .read_misses          = 3,
     .read_ahead_transfers = 0,
     .read_ahead_peeks     = 0,
     .read_blocks          = 3,
     .read_errors          = 0,
     .write_transfers      = 1,
     .write_blocks         = 3,
     .write_errors         = 0
   };
 
   int                             rv;
   int                             fd;
   ssize_t                         num_bytes;
   uint8_t                         cluster_buf[SECTOR_SIZE
                                               * SECTORS_PER_CLUSTER];
   uint32_t                        cluster_size = sizeof( cluster_buf );
   off_t                           off;
 
 
   memset( cluster_buf, 0xFE, cluster_size );
 
   format_and_mount( dev_name, mount_dir );
 
   fd = create_file( file_name );
   rtems_test_assert( fd >= 0 );
 
   num_bytes = write( fd, cluster_buf, cluster_size );
   rtems_test_assert( (ssize_t) cluster_size == num_bytes );
 
   off = lseek( fd, 0, SEEK_SET );
   rtems_test_assert( off == 0 );
 
   reset_block_stats( dev_name, mount_dir );
 
   /* Write a complete cluster into an existing file space */
   num_bytes = write( fd, cluster_buf, cluster_size );
   rtems_test_assert( (ssize_t) cluster_size == num_bytes );
 
   check_block_stats( dev_name, mount_dir, &complete_existing_block_stats );
   reset_block_stats( dev_name, mount_dir );
 
   /* Write a complete cluster into a new file space */
   num_bytes = write( fd, cluster_buf, cluster_size );
   rtems_test_assert( (ssize_t) cluster_size == num_bytes );
 
   check_block_stats( dev_name, mount_dir, &complete_new_block_stats );
   reset_block_stats( dev_name, mount_dir );
 
   /* Write a new partial cluster into a new file space */
   num_bytes = write( fd, cluster_buf, 1 );
   rtems_test_assert( num_bytes == 1 );
 
   check_block_stats( dev_name, mount_dir, &partial_new_block_stats );
 
   rv = close( fd );
   rtems_test_assert( 0 == rv );
 
   rv = unmount( mount_dir );
   rtems_test_assert( 0 == rv );
 }
 
 static void test_fat12_root_directory_write( const char *dev_name,
   const char                                            *mount_dir,
   const char                                            *file_name )
 {
   static const rtems_blkdev_stats fat12_root_dir_stats = {
     .read_hits            = 11,
     .read_misses          = 2,
     .read_ahead_transfers = 0,
     .read_blocks          = 2,
     .read_errors          = 0,
     .write_transfers      = 1,
     .write_blocks         = 1,
     .write_errors         = 0
   };
 
   int                             fd;
   int                             rv;
 
 
   format_and_mount( dev_name, mount_dir );
 
   reset_block_stats( dev_name, mount_dir );
 
   fd = create_file( file_name );
   rtems_test_assert( fd >= 0 );
 
   rv = close( fd );
   rtems_test_assert( rv == 0 );
 
   check_block_stats( dev_name, mount_dir, &fat12_root_dir_stats );
 
   rv = unmount( mount_dir );
   rtems_test_assert( rv == 0 );
 }
 
 static void test( void )
 {
   static const char dev_name[]  = "/dev/sda";
   static const char mount_dir[] = "/mnt";
   static const char file_name[] = "/mnt/file.txt";
 
   rtems_status_code sc;
   int               rv;
 
   rv = mkdir( mount_dir, S_IRWXU | S_IRWXG | S_IRWXO );
   rtems_test_assert( 0 == rv );
 
   /* A 1.44 MB disk */
   sc = rtems_sparse_disk_create_and_register(
     dev_name,
     SECTOR_SIZE,
     64,
     2880,
     0
     );
   rtems_test_assert( RTEMS_SUCCESSFUL == sc );
 
   test_fat12_root_directory_write( dev_name, mount_dir, file_name );
 
   test_normal_file_write( dev_name, mount_dir, file_name );
 
   rv = unlink( dev_name );
   rtems_test_assert( rv == 0 );
 }
 
 static void Init( rtems_task_argument arg )
 {
   TEST_BEGIN();
 
   test();
 
   TEST_END();
   rtems_test_exit( 0 );
 }
 
 #define CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER
 #define CONFIGURE_APPLICATION_NEEDS_SIMPLE_CONSOLE_DRIVER
 #define CONFIGURE_APPLICATION_NEEDS_LIBBLOCK
 
 #define CONFIGURE_FILESYSTEM_DOSFS
 
 /* 1 device file for blkstats + 1 file for writing + 1 mount_dir + stdin + stdout + stderr + device file when mounted */
 #define CONFIGURE_MAXIMUM_FILE_DESCRIPTORS 8
 
 #define CONFIGURE_UNLIMITED_OBJECTS
 #define CONFIGURE_UNIFIED_WORK_AREAS
 
 #define CONFIGURE_INIT_TASK_STACK_SIZE ( 32 * 1024 )
 
 #define CONFIGURE_INITIAL_EXTENSIONS RTEMS_TEST_INITIAL_EXTENSION
 
 #define CONFIGURE_RTEMS_INIT_TASKS_TABLE
 
 #define CONFIGURE_INIT_TASK_ATTRIBUTES RTEMS_FLOATING_POINT
 
 #define CONFIGURE_BDBUF_BUFFER_MAX_SIZE ( 32 * 1024 )
 
 #define CONFIGURE_INIT
 
 #include <rtems/confdefs.h>

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