[f36a7bfc] | 1 | /* |
---|
| 2 | * MSDOS file handlers 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 |
---|
[cf0539b1] | 9 | * http://www.rtems.com/license/LICENSE. |
---|
[f36a7bfc] | 10 | * |
---|
| 11 | * @(#) $Id$ |
---|
| 12 | */ |
---|
| 13 | #if HAVE_CONFIG_H |
---|
| 14 | #include "config.h" |
---|
| 15 | #endif |
---|
| 16 | |
---|
| 17 | #include <stdlib.h> |
---|
| 18 | #include <assert.h> |
---|
| 19 | #include <errno.h> |
---|
| 20 | |
---|
| 21 | #include <rtems.h> |
---|
| 22 | #include <rtems/libio.h> |
---|
| 23 | #include <rtems/libio_.h> |
---|
| 24 | |
---|
| 25 | #include "fat.h" |
---|
| 26 | #include "fat_fat_operations.h" |
---|
| 27 | #include "fat_file.h" |
---|
| 28 | |
---|
| 29 | #include "msdos.h" |
---|
| 30 | |
---|
| 31 | /* msdos_file_open -- |
---|
| 32 | * Open fat-file which correspondes to the file |
---|
| 33 | * |
---|
| 34 | * PARAMETERS: |
---|
| 35 | * iop - file control block |
---|
| 36 | * pathname - name |
---|
| 37 | * flag - flags |
---|
| 38 | * mode - mode |
---|
| 39 | * |
---|
| 40 | * RETURNS: |
---|
| 41 | * RC_OK, if file opened successfully, or -1 if error occured |
---|
| 42 | * and errno set appropriately |
---|
| 43 | */ |
---|
[a5305f6b] | 44 | int |
---|
[f91bbe64] | 45 | msdos_file_open(rtems_libio_t *iop, const char *pathname, uint32_t flag, |
---|
| 46 | uint32_t mode) |
---|
[f36a7bfc] | 47 | { |
---|
[a5305f6b] | 48 | int rc = RC_OK; |
---|
[f36a7bfc] | 49 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
[a5305f6b] | 50 | msdos_fs_info_t *fs_info = iop->pathinfo.mt_entry->fs_info; |
---|
[f36a7bfc] | 51 | fat_file_fd_t *fat_fd = iop->file_info; |
---|
| 52 | |
---|
| 53 | sc = rtems_semaphore_obtain(fs_info->vol_sema, RTEMS_WAIT, |
---|
| 54 | MSDOS_VOLUME_SEMAPHORE_TIMEOUT); |
---|
| 55 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 56 | set_errno_and_return_minus_one(EIO); |
---|
| 57 | |
---|
| 58 | rc = fat_file_reopen(fat_fd); |
---|
| 59 | if (rc != RC_OK) |
---|
| 60 | { |
---|
| 61 | rtems_semaphore_release(fs_info->vol_sema); |
---|
[a5305f6b] | 62 | return rc; |
---|
[f36a7bfc] | 63 | } |
---|
| 64 | |
---|
| 65 | if (iop->flags & LIBIO_FLAGS_APPEND) |
---|
| 66 | iop->offset = fat_fd->fat_file_size; |
---|
[a5305f6b] | 67 | |
---|
[f36a7bfc] | 68 | iop->size = fat_fd->fat_file_size; |
---|
[a5305f6b] | 69 | |
---|
[f36a7bfc] | 70 | rtems_semaphore_release(fs_info->vol_sema); |
---|
| 71 | return RC_OK; |
---|
| 72 | } |
---|
| 73 | |
---|
| 74 | /* msdos_file_close -- |
---|
[a5305f6b] | 75 | * Close fat-file which correspondes to the file. If fat-file descriptor |
---|
| 76 | * which correspondes to the file is not marked "removed", synchronize |
---|
[f36a7bfc] | 77 | * size, first cluster number, write time and date fields of the file. |
---|
| 78 | * |
---|
| 79 | * PARAMETERS: |
---|
| 80 | * iop - file control block |
---|
| 81 | * |
---|
| 82 | * RETURNS: |
---|
[a5305f6b] | 83 | * RC_OK, if file closed successfully, or -1 if error occured (errno set |
---|
[f36a7bfc] | 84 | * appropriately) |
---|
| 85 | */ |
---|
[a5305f6b] | 86 | int |
---|
[f36a7bfc] | 87 | msdos_file_close(rtems_libio_t *iop) |
---|
| 88 | { |
---|
[a5305f6b] | 89 | int rc = RC_OK; |
---|
[f36a7bfc] | 90 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
[a5305f6b] | 91 | msdos_fs_info_t *fs_info = iop->pathinfo.mt_entry->fs_info; |
---|
[f36a7bfc] | 92 | fat_file_fd_t *fat_fd = iop->file_info; |
---|
| 93 | |
---|
[a5305f6b] | 94 | sc = rtems_semaphore_obtain(fs_info->vol_sema, RTEMS_WAIT, |
---|
[f36a7bfc] | 95 | MSDOS_VOLUME_SEMAPHORE_TIMEOUT); |
---|
| 96 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 97 | set_errno_and_return_minus_one(EIO); |
---|
[a5305f6b] | 98 | |
---|
| 99 | /* |
---|
| 100 | * if fat-file descriptor is not marked as "removed", synchronize |
---|
[f36a7bfc] | 101 | * size, first cluster number, write time and date fields of the file |
---|
| 102 | */ |
---|
| 103 | if (!FAT_FILE_IS_REMOVED(fat_fd)) |
---|
[a5305f6b] | 104 | { |
---|
[f36a7bfc] | 105 | rc = msdos_set_first_cluster_num(iop->pathinfo.mt_entry, fat_fd); |
---|
| 106 | if (rc != RC_OK) |
---|
| 107 | { |
---|
| 108 | rtems_semaphore_release(fs_info->vol_sema); |
---|
| 109 | return rc; |
---|
| 110 | } |
---|
| 111 | |
---|
| 112 | rc = msdos_set_file_size(iop->pathinfo.mt_entry, fat_fd); |
---|
| 113 | if (rc != RC_OK) |
---|
[a5305f6b] | 114 | { |
---|
[f36a7bfc] | 115 | rtems_semaphore_release(fs_info->vol_sema); |
---|
| 116 | return rc; |
---|
[a5305f6b] | 117 | } |
---|
[f36a7bfc] | 118 | |
---|
| 119 | rc = msdos_set_dir_wrt_time_and_date(iop->pathinfo.mt_entry, fat_fd); |
---|
| 120 | if (rc != RC_OK) |
---|
| 121 | { |
---|
| 122 | rtems_semaphore_release(fs_info->vol_sema); |
---|
| 123 | return rc; |
---|
[a5305f6b] | 124 | } |
---|
[f36a7bfc] | 125 | } |
---|
[a5305f6b] | 126 | |
---|
[f36a7bfc] | 127 | rc = fat_file_close(iop->pathinfo.mt_entry, fat_fd); |
---|
| 128 | |
---|
| 129 | rtems_semaphore_release(fs_info->vol_sema); |
---|
| 130 | return rc; |
---|
| 131 | } |
---|
| 132 | |
---|
| 133 | /* msdos_file_read -- |
---|
| 134 | * This routine read from file pointed to by file control block into |
---|
| 135 | * the specified data buffer provided by user |
---|
| 136 | * |
---|
| 137 | * PARAMETERS: |
---|
| 138 | * iop - file control block |
---|
| 139 | * buffer - buffer provided by user |
---|
| 140 | * count - the number of bytes to read |
---|
| 141 | * |
---|
| 142 | * RETURNS: |
---|
[a5305f6b] | 143 | * the number of bytes read on success, or -1 if error occured (errno set |
---|
[f36a7bfc] | 144 | * appropriately) |
---|
| 145 | */ |
---|
[a5305f6b] | 146 | ssize_t |
---|
[7192476f] | 147 | msdos_file_read(rtems_libio_t *iop, void *buffer, size_t count) |
---|
[f36a7bfc] | 148 | { |
---|
[c788f380] | 149 | ssize_t ret = 0; |
---|
[f36a7bfc] | 150 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
[a5305f6b] | 151 | msdos_fs_info_t *fs_info = iop->pathinfo.mt_entry->fs_info; |
---|
[f36a7bfc] | 152 | fat_file_fd_t *fat_fd = iop->file_info; |
---|
| 153 | |
---|
| 154 | sc = rtems_semaphore_obtain(fs_info->vol_sema, RTEMS_WAIT, |
---|
| 155 | MSDOS_VOLUME_SEMAPHORE_TIMEOUT); |
---|
| 156 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 157 | set_errno_and_return_minus_one(EIO); |
---|
| 158 | |
---|
[a5305f6b] | 159 | ret = fat_file_read(iop->pathinfo.mt_entry, fat_fd, iop->offset, count, |
---|
[f36a7bfc] | 160 | buffer); |
---|
| 161 | |
---|
| 162 | rtems_semaphore_release(fs_info->vol_sema); |
---|
| 163 | return ret; |
---|
| 164 | } |
---|
| 165 | |
---|
| 166 | /* msdos_file_write -- |
---|
[a5305f6b] | 167 | * This routine writes the specified data buffer into the file pointed to |
---|
[f36a7bfc] | 168 | * by file control block. |
---|
| 169 | * |
---|
| 170 | * PARAMETERS: |
---|
| 171 | * iop - file control block |
---|
| 172 | * buffer - data to write |
---|
| 173 | * count - count of bytes to write |
---|
| 174 | * |
---|
| 175 | * RETURNS: |
---|
| 176 | * the number of bytes written on success, or -1 if error occured |
---|
| 177 | * and errno set appropriately |
---|
| 178 | */ |
---|
[a5305f6b] | 179 | ssize_t |
---|
[7192476f] | 180 | msdos_file_write(rtems_libio_t *iop,const void *buffer, size_t count) |
---|
[f36a7bfc] | 181 | { |
---|
[a5305f6b] | 182 | ssize_t ret = 0; |
---|
[f36a7bfc] | 183 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
[a5305f6b] | 184 | msdos_fs_info_t *fs_info = iop->pathinfo.mt_entry->fs_info; |
---|
[f36a7bfc] | 185 | fat_file_fd_t *fat_fd = iop->file_info; |
---|
| 186 | |
---|
| 187 | sc = rtems_semaphore_obtain(fs_info->vol_sema, RTEMS_WAIT, |
---|
| 188 | MSDOS_VOLUME_SEMAPHORE_TIMEOUT); |
---|
| 189 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 190 | set_errno_and_return_minus_one(EIO); |
---|
| 191 | |
---|
[a5305f6b] | 192 | ret = fat_file_write(iop->pathinfo.mt_entry, fat_fd, iop->offset, count, |
---|
[f36a7bfc] | 193 | buffer); |
---|
| 194 | if (ret < 0) |
---|
| 195 | { |
---|
[a5305f6b] | 196 | rtems_semaphore_release(fs_info->vol_sema); |
---|
[f36a7bfc] | 197 | return -1; |
---|
| 198 | } |
---|
| 199 | |
---|
[a5305f6b] | 200 | /* |
---|
| 201 | * update file size in both fat-file descriptor and file control block if |
---|
[f36a7bfc] | 202 | * file was extended |
---|
| 203 | */ |
---|
| 204 | if (iop->offset + ret > fat_fd->fat_file_size) |
---|
| 205 | fat_fd->fat_file_size = iop->offset + ret; |
---|
| 206 | |
---|
| 207 | iop->size = fat_fd->fat_file_size; |
---|
| 208 | |
---|
| 209 | rtems_semaphore_release(fs_info->vol_sema); |
---|
| 210 | return ret; |
---|
| 211 | } |
---|
| 212 | |
---|
| 213 | /* msdos_file_lseek -- |
---|
[a5305f6b] | 214 | * Process lseek call to the file: extend file if lseek is up to the end |
---|
[f36a7bfc] | 215 | * of the file. |
---|
| 216 | * |
---|
| 217 | * PARAMETERS: |
---|
| 218 | * iop - file control block |
---|
| 219 | * offset - new offset |
---|
| 220 | * whence - predefine directive |
---|
| 221 | * |
---|
| 222 | * RETURNS: |
---|
[a5305f6b] | 223 | * new offset on success, or -1 if error occured (errno set |
---|
[f36a7bfc] | 224 | * appropriately). |
---|
| 225 | */ |
---|
[a5305f6b] | 226 | int |
---|
[f36a7bfc] | 227 | msdos_file_lseek(rtems_libio_t *iop, off_t offset, int whence) |
---|
| 228 | { |
---|
| 229 | int rc = RC_OK; |
---|
| 230 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
[a5305f6b] | 231 | msdos_fs_info_t *fs_info = iop->pathinfo.mt_entry->fs_info; |
---|
[f36a7bfc] | 232 | fat_file_fd_t *fat_fd = iop->file_info; |
---|
[f91bbe64] | 233 | uint32_t real_size = 0; |
---|
[f36a7bfc] | 234 | |
---|
| 235 | sc = rtems_semaphore_obtain(fs_info->vol_sema, RTEMS_WAIT, |
---|
| 236 | MSDOS_VOLUME_SEMAPHORE_TIMEOUT); |
---|
| 237 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 238 | set_errno_and_return_minus_one(EIO); |
---|
| 239 | |
---|
[a5305f6b] | 240 | rc = fat_file_extend(iop->pathinfo.mt_entry, fat_fd, iop->offset, |
---|
[f36a7bfc] | 241 | &real_size); |
---|
| 242 | if (rc != RC_OK) |
---|
| 243 | { |
---|
| 244 | rtems_semaphore_release(fs_info->vol_sema); |
---|
| 245 | return rc; |
---|
| 246 | } |
---|
| 247 | |
---|
| 248 | if (real_size > fat_fd->fat_file_size) |
---|
| 249 | fat_fd->fat_file_size = iop->offset = real_size; |
---|
[a5305f6b] | 250 | |
---|
[f36a7bfc] | 251 | iop->size = fat_fd->fat_file_size; |
---|
| 252 | |
---|
| 253 | rtems_semaphore_release(fs_info->vol_sema); |
---|
| 254 | return iop->offset; |
---|
| 255 | } |
---|
| 256 | |
---|
| 257 | /* msdos_file_stat -- |
---|
| 258 | * |
---|
| 259 | * PARAMETERS: |
---|
| 260 | * loc - node description |
---|
| 261 | * buf - stat buffer provided by user |
---|
| 262 | * |
---|
| 263 | * RETURNS: |
---|
| 264 | * RC_OK on success, or -1 if error occured (errno set appropriately) |
---|
| 265 | */ |
---|
[a5305f6b] | 266 | int |
---|
[f36a7bfc] | 267 | msdos_file_stat( |
---|
| 268 | rtems_filesystem_location_info_t *loc, |
---|
| 269 | struct stat *buf |
---|
| 270 | ) |
---|
| 271 | { |
---|
| 272 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
[a5305f6b] | 273 | msdos_fs_info_t *fs_info = loc->mt_entry->fs_info; |
---|
[f36a7bfc] | 274 | fat_file_fd_t *fat_fd = loc->node_access; |
---|
| 275 | |
---|
| 276 | sc = rtems_semaphore_obtain(fs_info->vol_sema, RTEMS_WAIT, |
---|
| 277 | MSDOS_VOLUME_SEMAPHORE_TIMEOUT); |
---|
| 278 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 279 | set_errno_and_return_minus_one(EIO); |
---|
[a5305f6b] | 280 | |
---|
[f36a7bfc] | 281 | buf->st_dev = fs_info->fat.vol.dev; |
---|
| 282 | buf->st_ino = fat_fd->ino; |
---|
| 283 | buf->st_mode = S_IFREG; |
---|
| 284 | buf->st_rdev = 0ll; |
---|
| 285 | buf->st_size = fat_fd->fat_file_size; |
---|
| 286 | buf->st_blocks = fat_fd->fat_file_size >> FAT_SECTOR512_BITS; |
---|
| 287 | buf->st_blksize = fs_info->fat.vol.bps; |
---|
| 288 | buf->st_mtime = fat_fd->mtime; |
---|
| 289 | |
---|
| 290 | rtems_semaphore_release(fs_info->vol_sema); |
---|
| 291 | return RC_OK; |
---|
| 292 | } |
---|
| 293 | |
---|
| 294 | /* msdos_file_ftruncate -- |
---|
| 295 | * Truncate the file (if new length is greater then current do nothing). |
---|
| 296 | * |
---|
| 297 | * PARAMETERS: |
---|
| 298 | * iop - file control block |
---|
[a5305f6b] | 299 | * length - new length |
---|
[f36a7bfc] | 300 | * |
---|
| 301 | * RETURNS: |
---|
| 302 | * RC_OK on success, or -1 if error occured (errno set appropriately). |
---|
| 303 | */ |
---|
[a5305f6b] | 304 | int |
---|
[f36a7bfc] | 305 | msdos_file_ftruncate(rtems_libio_t *iop, off_t length) |
---|
| 306 | { |
---|
| 307 | int rc = RC_OK; |
---|
| 308 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
[a5305f6b] | 309 | msdos_fs_info_t *fs_info = iop->pathinfo.mt_entry->fs_info; |
---|
[f36a7bfc] | 310 | fat_file_fd_t *fat_fd = iop->file_info; |
---|
| 311 | |
---|
| 312 | if (length >= fat_fd->fat_file_size) |
---|
| 313 | return RC_OK; |
---|
| 314 | |
---|
| 315 | sc = rtems_semaphore_obtain(fs_info->vol_sema, RTEMS_WAIT, |
---|
| 316 | MSDOS_VOLUME_SEMAPHORE_TIMEOUT); |
---|
| 317 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 318 | set_errno_and_return_minus_one(EIO); |
---|
[a5305f6b] | 319 | |
---|
[f36a7bfc] | 320 | rc = fat_file_truncate(iop->pathinfo.mt_entry, fat_fd, length); |
---|
| 321 | if (rc != RC_OK) |
---|
| 322 | { |
---|
| 323 | rtems_semaphore_release(fs_info->vol_sema); |
---|
| 324 | return rc; |
---|
| 325 | } |
---|
| 326 | |
---|
[a5305f6b] | 327 | /* |
---|
| 328 | * fat_file_truncate do nothing if new length >= fat-file size, so update |
---|
[f36a7bfc] | 329 | * file size only if length < fat-file size |
---|
| 330 | */ |
---|
| 331 | if (length < fat_fd->fat_file_size) |
---|
| 332 | iop->size = fat_fd->fat_file_size = length; |
---|
[a5305f6b] | 333 | |
---|
[f36a7bfc] | 334 | rtems_semaphore_release(fs_info->vol_sema); |
---|
| 335 | return RC_OK; |
---|
| 336 | } |
---|
| 337 | |
---|
| 338 | /* msdos_file_sync -- |
---|
[a5305f6b] | 339 | * Synchronize file - synchronize file data and if file is not removed |
---|
[f36a7bfc] | 340 | * synchronize file metadata. |
---|
| 341 | * |
---|
| 342 | * PARAMETERS: |
---|
| 343 | * iop - file control block |
---|
| 344 | * |
---|
| 345 | * RETURNS: |
---|
| 346 | * RC_OK on success, or -1 if error occured (errno set appropriately) |
---|
| 347 | */ |
---|
| 348 | int |
---|
| 349 | msdos_file_sync(rtems_libio_t *iop) |
---|
| 350 | { |
---|
| 351 | int rc = RC_OK; |
---|
| 352 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
| 353 | fat_file_fd_t *fat_fd = iop->file_info; |
---|
| 354 | msdos_fs_info_t *fs_info = iop->pathinfo.mt_entry->fs_info; |
---|
[a5305f6b] | 355 | |
---|
[f36a7bfc] | 356 | sc = rtems_semaphore_obtain(fs_info->vol_sema, RTEMS_WAIT, |
---|
| 357 | MSDOS_VOLUME_SEMAPHORE_TIMEOUT); |
---|
| 358 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 359 | set_errno_and_return_minus_one(EIO); |
---|
[a5305f6b] | 360 | |
---|
[f36a7bfc] | 361 | /* synchronize file data */ |
---|
| 362 | rc = fat_file_datasync(iop->pathinfo.mt_entry, fat_fd); |
---|
| 363 | if (rc != RC_OK) |
---|
| 364 | { |
---|
| 365 | rtems_semaphore_release(fs_info->vol_sema); |
---|
| 366 | return rc; |
---|
| 367 | } |
---|
| 368 | |
---|
[a5305f6b] | 369 | /* |
---|
| 370 | * if fat-file descriptor is not marked "removed" - synchronize file |
---|
[f36a7bfc] | 371 | * metadata |
---|
| 372 | */ |
---|
| 373 | if (!FAT_FILE_IS_REMOVED(fat_fd)) |
---|
[a5305f6b] | 374 | { |
---|
[f36a7bfc] | 375 | rc = msdos_set_first_cluster_num(iop->pathinfo.mt_entry, fat_fd); |
---|
| 376 | if (rc != RC_OK) |
---|
| 377 | { |
---|
| 378 | rtems_semaphore_release(fs_info->vol_sema); |
---|
| 379 | return rc; |
---|
| 380 | } |
---|
| 381 | rc = msdos_set_file_size(iop->pathinfo.mt_entry, fat_fd); |
---|
| 382 | if (rc != RC_OK) |
---|
| 383 | { |
---|
| 384 | rtems_semaphore_release(fs_info->vol_sema); |
---|
| 385 | return rc; |
---|
[a5305f6b] | 386 | } |
---|
[f36a7bfc] | 387 | rc = msdos_set_dir_wrt_time_and_date(iop->pathinfo.mt_entry, fat_fd); |
---|
| 388 | if (rc != RC_OK) |
---|
| 389 | { |
---|
| 390 | rtems_semaphore_release(fs_info->vol_sema); |
---|
| 391 | return rc; |
---|
[a5305f6b] | 392 | } |
---|
[f36a7bfc] | 393 | } |
---|
[a5305f6b] | 394 | |
---|
[f36a7bfc] | 395 | rtems_semaphore_release(fs_info->vol_sema); |
---|
| 396 | return RC_OK; |
---|
| 397 | } |
---|
| 398 | |
---|
| 399 | /* msdos_file_datasync -- |
---|
| 400 | * Synchronize file - synchronize only file data (metadata is letf intact). |
---|
| 401 | * |
---|
| 402 | * PARAMETERS: |
---|
| 403 | * iop - file control block |
---|
| 404 | * |
---|
| 405 | * RETURNS: |
---|
| 406 | * RC_OK on success, or -1 if error occured (errno set appropriately) |
---|
| 407 | */ |
---|
| 408 | int |
---|
| 409 | msdos_file_datasync(rtems_libio_t *iop) |
---|
| 410 | { |
---|
| 411 | int rc = RC_OK; |
---|
| 412 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
| 413 | fat_file_fd_t *fat_fd = iop->file_info; |
---|
| 414 | msdos_fs_info_t *fs_info = iop->pathinfo.mt_entry->fs_info; |
---|
[a5305f6b] | 415 | |
---|
[f36a7bfc] | 416 | sc = rtems_semaphore_obtain(fs_info->vol_sema, RTEMS_WAIT, |
---|
| 417 | MSDOS_VOLUME_SEMAPHORE_TIMEOUT); |
---|
| 418 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 419 | set_errno_and_return_minus_one(EIO); |
---|
[a5305f6b] | 420 | |
---|
[f36a7bfc] | 421 | /* synchronize file data */ |
---|
| 422 | rc = fat_file_datasync(iop->pathinfo.mt_entry, fat_fd); |
---|
[a5305f6b] | 423 | |
---|
[f36a7bfc] | 424 | rtems_semaphore_release(fs_info->vol_sema); |
---|
| 425 | return RC_OK; |
---|
| 426 | } |
---|
| 427 | |
---|
| 428 | |
---|
| 429 | /* msdos_file_ioctl -- |
---|
| 430 | * |
---|
| 431 | * |
---|
| 432 | * PARAMETERS: |
---|
| 433 | * iop - file control block |
---|
| 434 | * ... |
---|
| 435 | * |
---|
| 436 | * RETURNS: |
---|
| 437 | * |
---|
| 438 | */ |
---|
[a5305f6b] | 439 | int |
---|
[f91bbe64] | 440 | msdos_file_ioctl(rtems_libio_t *iop,uint32_t command, void *buffer) |
---|
[f36a7bfc] | 441 | { |
---|
| 442 | int rc = RC_OK; |
---|
| 443 | |
---|
| 444 | return rc; |
---|
| 445 | } |
---|
| 446 | |
---|
| 447 | /* msdos_file_rmnod -- |
---|
[a5305f6b] | 448 | * Remove node associated with a file - set up first name character to |
---|
| 449 | * predefined value(and write it to the disk), and mark fat-file which |
---|
[f36a7bfc] | 450 | * correspondes to the file as "removed" |
---|
| 451 | * |
---|
| 452 | * PARAMETERS: |
---|
| 453 | * pathloc - node description |
---|
| 454 | * |
---|
| 455 | * RETURNS: |
---|
| 456 | * RC_OK on success, or -1 if error occured (errno set appropriately) |
---|
| 457 | */ |
---|
[e197621] | 458 | int |
---|
[f36a7bfc] | 459 | msdos_file_rmnod(rtems_filesystem_location_info_t *pathloc) |
---|
| 460 | { |
---|
[e197621] | 461 | int rc = RC_OK; |
---|
[f36a7bfc] | 462 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
| 463 | msdos_fs_info_t *fs_info = pathloc->mt_entry->fs_info; |
---|
| 464 | fat_file_fd_t *fat_fd = pathloc->node_access; |
---|
| 465 | |
---|
| 466 | sc = rtems_semaphore_obtain(fs_info->vol_sema, RTEMS_WAIT, |
---|
| 467 | MSDOS_VOLUME_SEMAPHORE_TIMEOUT); |
---|
| 468 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 469 | set_errno_and_return_minus_one(EIO); |
---|
| 470 | |
---|
| 471 | /* mark file removed */ |
---|
[a5305f6b] | 472 | rc = msdos_set_first_char4file_name(pathloc->mt_entry, fat_fd->info_cln, |
---|
| 473 | fat_fd->info_ofs, |
---|
[f36a7bfc] | 474 | MSDOS_THIS_DIR_ENTRY_EMPTY); |
---|
| 475 | if (rc != RC_OK) |
---|
| 476 | { |
---|
| 477 | rtems_semaphore_release(fs_info->vol_sema); |
---|
| 478 | return rc; |
---|
| 479 | } |
---|
| 480 | |
---|
[a5305f6b] | 481 | fat_file_mark_removed(pathloc->mt_entry, fat_fd); |
---|
[f36a7bfc] | 482 | |
---|
| 483 | rtems_semaphore_release(fs_info->vol_sema); |
---|
| 484 | return RC_OK; |
---|
| 485 | } |
---|