source: rtems/cpukit/libfs/src/dosfs/msdos_initsupp.c @ b17ff491

4.104.114.84.95
Last change on this file since b17ff491 was b17ff491, checked in by Joel Sherrill <joel.sherrill@…>, on May 6, 2005 at 2:57:43 PM

2005-05-06 Joel Sherrill <joel@…>

  • libblock/src/blkdev.c, libfs/src/dosfs/fat_file.c, libfs/src/dosfs/fat_file.h, libfs/src/dosfs/msdos.h, libfs/src/dosfs/msdos_create.c, libfs/src/dosfs/msdos_dir.c, libfs/src/dosfs/msdos_initsupp.c, libfs/src/dosfs/msdos_misc.c: Removed warnings.
  • Property mode set to 100644
File size: 4.1 KB
Line 
1/*
2 *  MSDOS Initialization support routine implementation
3 *
4 *  Copyright (C) 2001 OKTET Ltd., St.-Petersburg, Russia
5 *  Author: Eugeny S. Mints <Eugeny.Mints@oktet.ru>
6 *
7 *  The license and distribution terms for this file may be
8 *  found in the file LICENSE in this distribution or at
9 *  http://www.rtems.com/license/LICENSE.
10 *
11 *  @(#) $Id$
12 */
13
14#if HAVE_CONFIG_H
15#include "config.h"
16#endif
17
18#include <sys/types.h>
19#include <fcntl.h>
20#include <unistd.h>
21#include <stdlib.h>
22#include <stdio.h>
23
24#include <assert.h>
25#include <rtems.h>
26#include <rtems/libio_.h>
27
28#include "fat.h"
29#include "fat_fat_operations.h"
30#include "fat_file.h"
31
32#include "msdos.h"
33
34/* msdos_initialize_support --
35 *     MSDOS filesystem initialization
36 *
37 * PARAMETERS:
38 *     temp_mt_entry      - mount table entry
39 *     op_table           - filesystem operations table
40 *     file_handlers      - file operations table
41 *     directory_handlers - directory operations table
42 *
43 * RETURNS:
44 *     RC_OK and filled temp_mt_entry on success, or -1 if error occured
45 *     (errno set apropriately)
46 *
47 */
48int
49msdos_initialize_support(
50    rtems_filesystem_mount_table_entry_t *temp_mt_entry,
51    rtems_filesystem_operations_table    *op_table,
52    rtems_filesystem_file_handlers_r     *file_handlers,
53    rtems_filesystem_file_handlers_r     *directory_handlers
54    )
55{
56    int                rc = RC_OK;
57    rtems_status_code  sc = RTEMS_SUCCESSFUL;
58    msdos_fs_info_t   *fs_info = NULL;
59    fat_file_fd_t     *fat_fd = NULL;
60    uint32_t           cl_buf_size;
61
62    fs_info = (msdos_fs_info_t *)calloc(1, sizeof(msdos_fs_info_t));
63    if (!fs_info)
64        set_errno_and_return_minus_one(ENOMEM);
65
66    temp_mt_entry->fs_info = fs_info;
67
68    rc = fat_init_volume_info(temp_mt_entry);
69    if (rc != RC_OK)
70    {
71        free(fs_info);
72        return rc;
73    }
74
75    fs_info->file_handlers      = file_handlers;
76    fs_info->directory_handlers = directory_handlers;
77
78    /*
79     * open fat-file which correspondes to  root directory
80     * (so inode number 0x00000010 is always used for root directory)
81     */
82    rc = fat_file_open(temp_mt_entry, FAT_ROOTDIR_CLUSTER_NUM, 0, &fat_fd);
83    if (rc != RC_OK)
84    {
85        fat_shutdown_drive(temp_mt_entry);
86        free(fs_info);
87        return rc;
88    }
89
90    /* again: unfortunately "fat-file" is just almost fat file :( */
91    fat_fd->fat_file_type = FAT_DIRECTORY;
92    fat_fd->size_limit = MSDOS_MAX_DIR_LENGHT;
93    fat_fd->info_cln = FAT_ROOTDIR_CLUSTER_NUM;
94    fat_fd->info_ofs = 0;
95    fat_fd->cln = fs_info->fat.vol.rdir_cl;
96
97    fat_fd->map.file_cln = 0;
98    fat_fd->map.disk_cln = fat_fd->cln;
99
100    /* if we have FAT12/16 */
101    if ( fat_fd->cln == 0 )
102    {
103        fat_fd->fat_file_size = fs_info->fat.vol.rdir_size;
104        cl_buf_size = (fs_info->fat.vol.bpc > fs_info->fat.vol.rdir_size) ?
105                      fs_info->fat.vol.bpc                                :
106                      fs_info->fat.vol.rdir_size;
107    }
108    else
109    {
110        rc = fat_file_size(temp_mt_entry, fat_fd);
111        if ( rc != RC_OK )
112        {
113            fat_file_close(temp_mt_entry, fat_fd);
114            fat_shutdown_drive(temp_mt_entry);
115            free(fs_info);
116            return rc;
117        }
118        cl_buf_size = fs_info->fat.vol.bpc;
119    }
120
121    fs_info->cl_buf = (uint8_t *)calloc(cl_buf_size, sizeof(char));
122    if (fs_info->cl_buf == NULL)
123    {
124        fat_file_close(temp_mt_entry, fat_fd);
125        fat_shutdown_drive(temp_mt_entry);
126        free(fs_info);
127        set_errno_and_return_minus_one(ENOMEM);
128    }
129
130    sc = rtems_semaphore_create(3,
131                                1,
132                                RTEMS_BINARY_SEMAPHORE | RTEMS_FIFO,
133                                0,
134                                &fs_info->vol_sema);
135    if (sc != RTEMS_SUCCESSFUL)
136    {
137        fat_file_close(temp_mt_entry, fat_fd);
138        fat_shutdown_drive(temp_mt_entry);
139        free(fs_info->cl_buf);
140        free(fs_info);
141        set_errno_and_return_minus_one( EIO );
142    }
143
144    temp_mt_entry->mt_fs_root.node_access = fat_fd;
145    temp_mt_entry->mt_fs_root.handlers = directory_handlers;
146    temp_mt_entry->mt_fs_root.ops = op_table;
147
148    return rc;
149}
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