1 /* 2 * (C) Copyright 2015 Google, Inc 3 * Written by Simon Glass <sjg@chromium.org> 4 * 5 * (C) 2017 Theobroma Systems Design und Consulting GmbH 6 * 7 * SPDX-License-Identifier: GPL-2.0+ 8 * 9 * Helper functions for Rockchip images 10 */ 11 12 #include "imagetool.h" 13 #include <image.h> 14 #include <u-boot/sha256.h> 15 #include <rc4.h> 16 #include "mkimage.h" 17 #include "rkcommon.h" 18 19 enum { 20 RK_MAGIC = 0x0ff0aa55, 21 RK_MAGIC_V2 = 0x534E4B52, 22 }; 23 24 enum { 25 RK_HEADER_V1 = 1, 26 RK_HEADER_V2 = 2, 27 }; 28 29 enum hash_type { 30 HASH_NONE = 0, 31 HASH_SHA256 = 1, 32 HASH_SHA512 = 2, 33 }; 34 35 /** 36 * struct image_entry 37 * 38 * @size_and_off: [31:16]image size;[15:0]image offset 39 * @address: default as 0xFFFFFFFF 40 * @flag: no use 41 * @counter: no use 42 * @hash: hash of image 43 * 44 */ 45 struct image_entry { 46 uint32_t size_and_off; 47 uint32_t address; 48 uint32_t flag; 49 uint32_t counter; 50 uint8_t reserved[8]; 51 uint8_t hash[64]; 52 }; 53 54 /** 55 * struct header0_info_v2 - from rk35 on boot rom using the new header block 56 * 57 * This is stored at SD card block 64 (where each block is 512 bytes) 58 * 59 * @magic: Magic (must be RK_MAGIC_V2) 60 * @size_and_nimage: [31:16]number of images;[15:0] 61 * offset to hash field of header(unit as 4Byte) 62 * @boot_flag: [3:0]hash type(0:none,1:sha256,2:sha512) 63 * @signature: hash or signature for header info 64 * 65 */ 66 struct header0_info_v2 { 67 uint32_t magic; 68 uint8_t reserved[4]; 69 uint32_t size_and_nimage; 70 uint32_t boot_flag; 71 uint8_t reserved1[104]; 72 struct image_entry images[4]; 73 uint8_t reserved2[1064]; 74 uint8_t hash[512]; 75 }; 76 77 /** 78 * struct header0_info - header block for boot ROM 79 * 80 * This is stored at SD card block 64 (where each block is 512 bytes, or at 81 * the start of SPI flash. It is encoded with RC4. 82 * 83 * @magic: Magic (must be RK_MAGIC) 84 * @disable_rc4: 0 to use rc4 for boot image, 1 to use plain binary 85 * @init_offset: Offset in blocks of the SPL code from this header 86 * block. E.g. 4 means 2KB after the start of this header. 87 * Other fields are not used by U-Boot 88 */ 89 struct header0_info { 90 uint32_t magic; 91 uint8_t reserved[4]; 92 uint32_t disable_rc4; 93 uint16_t init_offset; 94 uint8_t reserved1[492]; 95 uint16_t init_size; 96 uint16_t init_boot_size; 97 uint8_t reserved2[2]; 98 }; 99 100 /** 101 * struct header1 info 102 */ 103 struct header1_info { 104 uint32_t magic; 105 }; 106 107 /** 108 * struct spl_info - spl info for each chip 109 * 110 * @imagename: Image name(passed by "mkimage -n") 111 * @spl_hdr: Boot ROM requires a 4-bytes spl header 112 * @spl_size: Spl size(include extra 4-bytes spl header) 113 * @spl_rc4: RC4 encode the SPL binary (same key as header) 114 * @header_ver: header block version 115 */ 116 struct spl_info { 117 const char *imagename; 118 const char *spl_hdr; 119 const uint32_t spl_size; 120 const bool spl_rc4; 121 const uint32_t header_ver; 122 }; 123 124 static struct spl_info spl_infos[] = { 125 { "rk3036", "RK30", 0x1000, false, RK_HEADER_V1 }, 126 { "rk3066", "RK30", 0x8000, true, RK_HEADER_V1 }, 127 { "rk3128", "RK31", 0x2000 - 0x800, false, RK_HEADER_V1 }, 128 { "px3se", "RK31", 0x2000 - 0x800, false, RK_HEADER_V1 }, 129 { "rk3188", "RK31", 0x8000 - 0x800, true, RK_HEADER_V1 }, 130 { "rk322x", "RK32", 0x8000 - 0x1000, false, RK_HEADER_V1 }, 131 { "rk3288", "RK32", 0x8000, false, RK_HEADER_V1 }, 132 { "rk3308", "RK33", 0x40000 - 0x1000, false, RK_HEADER_V1 }, 133 { "rk3328", "RK32", 0x8000 - 0x800, false, RK_HEADER_V1 }, 134 { "rk3368", "RK33", 0x8000 - 0x1000, false, RK_HEADER_V1 }, 135 { "rk3399", "RK33", 0x30000 - 0x2000, false, RK_HEADER_V1 }, 136 { "rk3326", "RK33", 0x4000 - 0x1000, false, RK_HEADER_V1 }, 137 { "px30", "RK33", 0x4000 - 0x1000, false, RK_HEADER_V1 }, 138 { "rv1108", "RK11", 0x1800, false, RK_HEADER_V1 }, 139 { "rv1126", "110B", 0x10000 - 0x1000, false, RK_HEADER_V1 }, 140 { "rk1808", "RK18", 0x200000 - 0x2000, false, RK_HEADER_V1 }, 141 { "rk3528", "RK35", 0x10000 - 0x1000, false, RK_HEADER_V2 }, 142 { "rk3568", "RK35", 0x10000 - 0x1000, false, RK_HEADER_V2 }, 143 { "rk3588", "RK35", 0x100000 - 0x1000, false, RK_HEADER_V2 }, 144 }; 145 146 /** 147 * struct spl_params - spl params parsed in check_params() 148 * 149 * @init_file: Init data file path 150 * @init_size: Aligned size of init data in bytes 151 * @boot_file: Boot data file path 152 * @boot_size: Aligned size of boot data in bytes 153 */ 154 155 struct spl_params { 156 char *init_file; 157 uint32_t init_size; 158 char *boot_file; 159 uint32_t boot_size; 160 }; 161 162 static struct spl_params spl_params = { 0 }; 163 164 static unsigned char rc4_key[16] = { 165 124, 78, 3, 4, 85, 5, 9, 7, 166 45, 44, 123, 56, 23, 13, 23, 17 167 }; 168 169 static struct spl_info *rkcommon_get_spl_info(char *imagename) 170 { 171 int i; 172 173 if (!imagename) 174 return NULL; 175 176 for (i = 0; i < ARRAY_SIZE(spl_infos); i++) 177 if (!strncmp(imagename, spl_infos[i].imagename, 6)) 178 return spl_infos + i; 179 180 return NULL; 181 } 182 183 static int rkcommon_get_aligned_size(struct image_tool_params *params, 184 const char *fname) 185 { 186 int size; 187 188 size = imagetool_get_filesize(params, fname); 189 if (size < 0) 190 return -1; 191 192 /* 193 * Pad to a 2KB alignment, as required for init/boot size by the ROM 194 * (see https://lists.denx.de/pipermail/u-boot/2017-May/293268.html) 195 */ 196 return ROUND(size, RK_SIZE_ALIGN); 197 } 198 199 int rkcommon_check_params(struct image_tool_params *params) 200 { 201 int i; 202 203 /* 204 * If this is a operation (list or extract), the don't require 205 * imagename to be set. 206 */ 207 if (params->lflag || params->iflag) 208 return EXIT_SUCCESS; 209 210 if (!rkcommon_get_spl_info(params->imagename)) 211 goto err_spl_info; 212 213 spl_params.init_file = params->datafile; 214 215 spl_params.boot_file = strchr(spl_params.init_file, ':'); 216 if (spl_params.boot_file) { 217 *spl_params.boot_file = '\0'; 218 spl_params.boot_file += 1; 219 } 220 221 spl_params.init_size = 222 rkcommon_get_aligned_size(params, spl_params.init_file); 223 if (spl_params.init_size < 0) 224 return EXIT_FAILURE; 225 226 /* Boot file is optional, and only for back-to-bootrom functionality. */ 227 if (spl_params.boot_file) { 228 spl_params.boot_size = 229 rkcommon_get_aligned_size(params, spl_params.boot_file); 230 if (spl_params.boot_size < 0) 231 return EXIT_FAILURE; 232 } 233 234 if (spl_params.init_size > rkcommon_get_spl_size(params)) { 235 fprintf(stderr, 236 "Error: SPL image is too large (size %#x than %#x)\n", 237 spl_params.init_size, rkcommon_get_spl_size(params)); 238 return EXIT_FAILURE; 239 } 240 241 return EXIT_SUCCESS; 242 243 err_spl_info: 244 fprintf(stderr, "ERROR: imagename (%s) is not supported!\n", 245 params->imagename ? params->imagename : "NULL"); 246 247 fprintf(stderr, "Available imagename:"); 248 for (i = 0; i < ARRAY_SIZE(spl_infos); i++) 249 fprintf(stderr, "\t%s", spl_infos[i].imagename); 250 fprintf(stderr, "\n"); 251 252 return EXIT_FAILURE; 253 } 254 255 const char *rkcommon_get_spl_hdr(struct image_tool_params *params) 256 { 257 struct spl_info *info = rkcommon_get_spl_info(params->imagename); 258 259 /* 260 * info would not be NULL, because of we checked params before. 261 */ 262 return info->spl_hdr; 263 } 264 265 int rkcommon_get_spl_size(struct image_tool_params *params) 266 { 267 struct spl_info *info = rkcommon_get_spl_info(params->imagename); 268 269 /* 270 * info would not be NULL, because of we checked params before. 271 */ 272 return info->spl_size; 273 } 274 275 bool rkcommon_need_rc4_spl(struct image_tool_params *params) 276 { 277 struct spl_info *info = rkcommon_get_spl_info(params->imagename); 278 279 /* 280 * info would not be NULL, because of we checked params before. 281 */ 282 return info->spl_rc4; 283 } 284 285 bool rkcommon_is_header_v2(struct image_tool_params *params) 286 { 287 struct spl_info *info = rkcommon_get_spl_info(params->imagename); 288 289 /* 290 * info would not be NULL, because of we checked params before. 291 */ 292 return (info->header_ver == RK_HEADER_V2); 293 } 294 295 static void do_sha256_hash(uint8_t *buf, uint32_t size, uint8_t *out) 296 { 297 sha256_context ctx; 298 299 sha256_starts(&ctx); 300 sha256_update(&ctx, buf, size); 301 sha256_finish(&ctx, out); 302 } 303 304 static void rkcommon_set_header0(void *buf, struct image_tool_params *params) 305 { 306 struct header0_info *hdr = buf; 307 308 memset(buf, '\0', RK_INIT_OFFSET * RK_BLK_SIZE); 309 hdr->magic = RK_MAGIC; 310 hdr->disable_rc4 = !rkcommon_need_rc4_spl(params); 311 hdr->init_offset = RK_INIT_OFFSET; 312 hdr->init_size = spl_params.init_size / RK_BLK_SIZE; 313 314 /* 315 * init_boot_size needs to be set, as it is read by the BootROM 316 * to determine the size of the next-stage bootloader (e.g. U-Boot 317 * proper), when used with the back-to-bootrom functionality. 318 * 319 * see https://lists.denx.de/pipermail/u-boot/2017-May/293267.html 320 * for a more detailed explanation by Andy Yan 321 */ 322 if (spl_params.boot_file) 323 hdr->init_boot_size = 324 hdr->init_size + spl_params.boot_size / RK_BLK_SIZE; 325 else 326 hdr->init_boot_size = 327 hdr->init_size + RK_MAX_BOOT_SIZE / RK_BLK_SIZE; 328 329 rc4_encode(buf, RK_BLK_SIZE, rc4_key); 330 } 331 332 static void rkcommon_set_header0_v2(void *buf, struct image_tool_params *params) 333 { 334 struct header0_info_v2 *hdr = buf; 335 uint32_t sector_offset, image_sector_count; 336 uint32_t image_size_array[2]; 337 uint8_t *image_ptr = NULL; 338 int i; 339 340 printf("Image Type: Rockchip %s boot image\n", rkcommon_get_spl_hdr(params)); 341 memset(buf, '\0', RK_INIT_OFFSET * RK_BLK_SIZE); 342 hdr->magic = cpu_to_le32(RK_MAGIC_V2); 343 hdr->size_and_nimage = cpu_to_le32((2 << 16) + 384); 344 hdr->boot_flag = cpu_to_le32(HASH_SHA256); 345 sector_offset = 4; 346 image_size_array[0] = spl_params.init_size; 347 image_size_array[1] = spl_params.boot_size; 348 349 for (i = 0; i < 2; i++) { 350 image_sector_count = image_size_array[i] / RK_BLK_SIZE; 351 hdr->images[i].size_and_off = cpu_to_le32((image_sector_count << 16) + sector_offset); 352 hdr->images[i].address = 0xFFFFFFFF; 353 hdr->images[i].counter = cpu_to_le32(i + 1); 354 image_ptr = buf + sector_offset * RK_BLK_SIZE; 355 do_sha256_hash(image_ptr, image_size_array[i], hdr->images[i].hash); 356 sector_offset = sector_offset + image_sector_count; 357 } 358 359 do_sha256_hash(buf, (void *)hdr->hash - buf, hdr->hash); 360 } 361 362 void rkcommon_set_header(void *buf, struct stat *sbuf, int ifd, 363 struct image_tool_params *params) 364 { 365 struct header1_info *hdr = buf + RK_SPL_HDR_START; 366 367 if (rkcommon_is_header_v2(params)) { 368 rkcommon_set_header0_v2(buf, params); 369 } else { 370 rkcommon_set_header0(buf, params); 371 372 /* Set up the SPL name (i.e. copy spl_hdr over) */ 373 if (memcmp(&hdr->magic, "RSAK", 4)) 374 memcpy(&hdr->magic, rkcommon_get_spl_hdr(params), RK_SPL_HDR_SIZE); 375 376 if (rkcommon_need_rc4_spl(params)) 377 rkcommon_rc4_encode_spl(buf, RK_SPL_HDR_START, 378 spl_params.init_size); 379 380 if (spl_params.boot_file) { 381 if (rkcommon_need_rc4_spl(params)) 382 rkcommon_rc4_encode_spl(buf + RK_SPL_HDR_START, 383 spl_params.init_size, 384 spl_params.boot_size); 385 } 386 } 387 } 388 389 static inline unsigned int rkcommon_offset_to_spi(unsigned int offset) 390 { 391 /* 392 * While SD/MMC images use a flat addressing, SPI images are padded 393 * to use the first 2K of every 4K sector only. 394 */ 395 return ((offset & ~0x7ff) << 1) + (offset & 0x7ff); 396 } 397 398 static int rkcommon_parse_header(const void *buf, struct header0_info *header0, 399 struct spl_info **spl_info) 400 { 401 unsigned int hdr1_offset; 402 struct header1_info *hdr1_sdmmc, *hdr1_spi; 403 int i; 404 405 if (spl_info) 406 *spl_info = NULL; 407 408 /* 409 * The first header (hdr0) is always RC4 encoded, so try to decrypt 410 * with the well-known key. 411 */ 412 memcpy((void *)header0, buf, sizeof(struct header0_info)); 413 rc4_encode((void *)header0, sizeof(struct header0_info), rc4_key); 414 415 if (header0->magic != RK_MAGIC) 416 return -EPROTO; 417 418 /* We don't support RC4 encoded image payloads here, yet... */ 419 if (header0->disable_rc4 == 0) 420 return -ENOSYS; 421 422 hdr1_offset = header0->init_offset * RK_BLK_SIZE; 423 hdr1_sdmmc = (struct header1_info *)(buf + hdr1_offset); 424 hdr1_spi = (struct header1_info *)(buf + 425 rkcommon_offset_to_spi(hdr1_offset)); 426 427 for (i = 0; i < ARRAY_SIZE(spl_infos); i++) { 428 if (!memcmp(&hdr1_sdmmc->magic, spl_infos[i].spl_hdr, 4)) { 429 if (spl_info) 430 *spl_info = &spl_infos[i]; 431 return IH_TYPE_RKSD; 432 } else if (!memcmp(&hdr1_spi->magic, spl_infos[i].spl_hdr, 4)) { 433 if (spl_info) 434 *spl_info = &spl_infos[i]; 435 return IH_TYPE_RKSPI; 436 } 437 } 438 439 return -1; 440 } 441 442 static int rkcommon_parse_header_v2(const void *buf, struct header0_info_v2 *header) 443 { 444 memcpy((void *)header, buf, sizeof(struct header0_info_v2)); 445 446 if (le32_to_cpu(header->magic) != RK_MAGIC_V2) 447 return -EPROTO; 448 449 return 0; 450 } 451 452 int rkcommon_verify_header(unsigned char *buf, int size, 453 struct image_tool_params *params) 454 { 455 struct header0_info header0; 456 struct spl_info *img_spl_info, *spl_info; 457 int ret; 458 459 /* spl_hdr is abandon on header_v2 */ 460 if ((*(uint32_t *)buf) == RK_MAGIC_V2) 461 return 0; 462 463 ret = rkcommon_parse_header(buf, &header0, &img_spl_info); 464 465 /* If this is the (unimplemented) RC4 case, then rewrite the result */ 466 if (ret == -ENOSYS) 467 return 0; 468 469 if (ret < 0) 470 return ret; 471 472 /* 473 * If no 'imagename' is specified via the commandline (e.g. if this is 474 * 'dumpimage -l' w/o any further constraints), we accept any spl_info. 475 */ 476 if (params->imagename == NULL) 477 return 0; 478 479 /* Match the 'imagename' against the 'spl_hdr' found */ 480 spl_info = rkcommon_get_spl_info(params->imagename); 481 if (spl_info && img_spl_info) 482 return strcmp(spl_info->spl_hdr, img_spl_info->spl_hdr); 483 484 return -ENOENT; 485 } 486 487 void rkcommon_print_header(const void *buf) 488 { 489 struct header0_info header0; 490 struct header0_info_v2 header0_v2; 491 struct spl_info *spl_info; 492 uint8_t image_type; 493 int ret, boot_size, init_size; 494 495 if ((*(uint32_t *)buf) == RK_MAGIC_V2) { 496 ret = rkcommon_parse_header_v2(buf, &header0_v2); 497 498 if (ret < 0) { 499 fprintf(stderr, "Error: image verification failed\n"); 500 return; 501 } 502 503 init_size = header0_v2.images[0].size_and_off >> 16; 504 init_size = init_size * RK_BLK_SIZE; 505 boot_size = header0_v2.images[1].size_and_off >> 16; 506 boot_size = boot_size * RK_BLK_SIZE; 507 } else { 508 ret = rkcommon_parse_header(buf, &header0, &spl_info); 509 510 /* If this is the (unimplemented) RC4 case, then fail silently */ 511 if (ret == -ENOSYS) 512 return; 513 514 if (ret < 0) { 515 fprintf(stderr, "Error: image verification failed\n"); 516 return; 517 } 518 519 image_type = ret; 520 init_size = header0.init_size * RK_BLK_SIZE; 521 boot_size = header0.init_boot_size * RK_BLK_SIZE - init_size; 522 printf("Image Type: Rockchip %s (%s) boot image\n", 523 spl_info->spl_hdr, 524 (image_type == IH_TYPE_RKSD) ? "SD/MMC" : "SPI"); 525 } 526 527 printf("Init Data Size: %d bytes\n", init_size); 528 529 if (boot_size != RK_MAX_BOOT_SIZE) 530 printf("Boot Data Size: %d bytes\n", boot_size); 531 } 532 533 void rkcommon_rc4_encode_spl(void *buf, unsigned int offset, unsigned int size) 534 { 535 unsigned int remaining = size; 536 537 while (remaining > 0) { 538 int step = (remaining > RK_BLK_SIZE) ? RK_BLK_SIZE : remaining; 539 540 rc4_encode(buf + offset, step, rc4_key); 541 offset += RK_BLK_SIZE; 542 remaining -= step; 543 } 544 } 545 546 int rkcommon_vrec_header(struct image_tool_params *params, 547 struct image_type_params *tparams) 548 { 549 /* 550 * The SPL image looks as follows: 551 * 552 * 0x0 header0 (see rkcommon.c) 553 * 0x800 spl_name ('RK30', ..., 'RK33') 554 * (start of the payload for AArch64 payloads: we expect the 555 * first 4 bytes to be available for overwriting with our 556 * spl_name) 557 * 0x804 first instruction to be executed 558 * (start of the image/payload for 32bit payloads) 559 * 560 * For AArch64 (ARMv8) payloads, natural alignment (8-bytes) is 561 * required for its sections (so the image we receive needs to 562 * have the first 4 bytes reserved for the spl_name). Reserving 563 * these 4 bytes is done using the BOOT0_HOOK infrastructure. 564 * 565 * The header is always at 0x800 (as we now use a payload 566 * prepadded using the boot0 hook for all targets): the first 567 * 4 bytes of these images can safely be overwritten using the 568 * boot magic. 569 */ 570 tparams->header_size = RK_SPL_HDR_START; 571 572 /* Allocate, clear and install the header */ 573 tparams->hdr = malloc(tparams->header_size); 574 if (!tparams->hdr) { 575 fprintf(stderr, "%s: Can't alloc header: %s\n", 576 params->cmdname, strerror(errno)); 577 exit(EXIT_FAILURE); 578 } 579 memset(tparams->hdr, 0, tparams->header_size); 580 581 /* 582 * We need to store the original file-size (i.e. before padding), as 583 * imagetool does not set this during its adjustment of file_size. 584 */ 585 params->orig_file_size = tparams->header_size + 586 spl_params.init_size + spl_params.boot_size; 587 588 params->file_size = ROUND(params->orig_file_size, RK_SIZE_ALIGN); 589 590 /* Ignoring pad len, since we are using our own copy_image() */ 591 return 0; 592 } 593 594 static int pad_file(struct image_tool_params *params, int ifd, int pad) 595 { 596 uint8_t zeros[4096]; 597 598 memset(zeros, 0, sizeof(zeros)); 599 600 while (pad > 0) { 601 int todo = sizeof(zeros); 602 603 if (todo > pad) 604 todo = pad; 605 if (write(ifd, (char *)&zeros, todo) != todo) { 606 fprintf(stderr, "%s: Write error on %s: %s\n", 607 params->cmdname, params->imagefile, 608 strerror(errno)); 609 return -1; 610 } 611 pad -= todo; 612 } 613 614 return 0; 615 } 616 617 static int copy_file(struct image_tool_params *params, int ifd, 618 const char *file, int padded_size) 619 { 620 int dfd; 621 struct stat sbuf; 622 unsigned char *ptr; 623 int size; 624 625 if (params->vflag) 626 fprintf(stderr, "Adding Image %s\n", file); 627 628 dfd = open(file, O_RDONLY | O_BINARY); 629 if (dfd < 0) { 630 fprintf(stderr, "%s: Can't open %s: %s\n", 631 params->cmdname, file, strerror(errno)); 632 return -1; 633 } 634 635 if (fstat(dfd, &sbuf) < 0) { 636 fprintf(stderr, "%s: Can't stat %s: %s\n", 637 params->cmdname, file, strerror(errno)); 638 goto err_close; 639 } 640 641 if (params->vflag) 642 fprintf(stderr, "Size %u(pad to %u)\n", 643 (int)sbuf.st_size, padded_size); 644 645 ptr = mmap(0, sbuf.st_size, PROT_READ, MAP_SHARED, dfd, 0); 646 if (ptr == MAP_FAILED) { 647 fprintf(stderr, "%s: Can't read %s: %s\n", 648 params->cmdname, file, strerror(errno)); 649 goto err_munmap; 650 } 651 652 size = sbuf.st_size; 653 if (write(ifd, ptr, size) != size) { 654 fprintf(stderr, "%s: Write error on %s: %s\n", 655 params->cmdname, params->imagefile, strerror(errno)); 656 goto err_munmap; 657 } 658 659 munmap((void *)ptr, sbuf.st_size); 660 close(dfd); 661 return pad_file(params, ifd, padded_size - size); 662 663 err_munmap: 664 munmap((void *)ptr, sbuf.st_size); 665 err_close: 666 close(dfd); 667 return -1; 668 } 669 670 int rockchip_copy_image(int ifd, struct image_tool_params *params) 671 { 672 int ret; 673 674 ret = copy_file(params, ifd, spl_params.init_file, 675 spl_params.init_size); 676 if (ret) 677 return ret; 678 679 if (spl_params.boot_file) { 680 ret = copy_file(params, ifd, spl_params.boot_file, 681 spl_params.boot_size); 682 if (ret) 683 return ret; 684 } 685 686 return pad_file(params, ifd, 687 params->file_size - params->orig_file_size); 688 } 689