1 /* 2 * initialize.c --- initialize a filesystem handle given superblock 3 * parameters. Used by mke2fs when initializing a filesystem. 4 * 5 * Copyright (C) 1994, 1995, 1996 Theodore Ts'o. 6 * 7 * %Begin-Header% 8 * This file may be redistributed under the terms of the GNU Library 9 * General Public License, version 2. 10 * %End-Header% 11 */ 12 13 #include "config.h" 14 #include <stdio.h> 15 #include <string.h> 16 #if HAVE_UNISTD_H 17 #include <unistd.h> 18 #endif 19 #include <fcntl.h> 20 #include <time.h> 21 #if HAVE_SYS_STAT_H 22 #include <sys/stat.h> 23 #endif 24 #if HAVE_SYS_TYPES_H 25 #include <sys/types.h> 26 #endif 27 28 #include "ext2_fs.h" 29 #include "ext2fs.h" 30 31 #ifndef O_BINARY 32 #define O_BINARY 0 33 #endif 34 35 #if defined(__linux__) && defined(EXT2_OS_LINUX) 36 #define CREATOR_OS EXT2_OS_LINUX 37 #else 38 #if defined(__GNU__) && defined(EXT2_OS_HURD) 39 #define CREATOR_OS EXT2_OS_HURD 40 #else 41 #if defined(__FreeBSD__) && defined(EXT2_OS_FREEBSD) 42 #define CREATOR_OS EXT2_OS_FREEBSD 43 #else 44 #if defined(LITES) && defined(EXT2_OS_LITES) 45 #define CREATOR_OS EXT2_OS_LITES 46 #else 47 #define CREATOR_OS EXT2_OS_LINUX /* by default */ 48 #endif /* defined(LITES) && defined(EXT2_OS_LITES) */ 49 #endif /* defined(__FreeBSD__) && defined(EXT2_OS_FREEBSD) */ 50 #endif /* defined(__GNU__) && defined(EXT2_OS_HURD) */ 51 #endif /* defined(__linux__) && defined(EXT2_OS_LINUX) */ 52 53 /* 54 * Calculate the number of GDT blocks to reserve for online filesystem growth. 55 * The absolute maximum number of GDT blocks we can reserve is determined by 56 * the number of block pointers that can fit into a single block. 57 */ 58 static unsigned int calc_reserved_gdt_blocks(ext2_filsys fs) 59 { 60 struct ext2_super_block *sb = fs->super; 61 unsigned long bpg = sb->s_blocks_per_group; 62 unsigned int gdpb = EXT2_DESC_PER_BLOCK(sb); 63 unsigned long max_blocks = 0xffffffff; 64 unsigned long rsv_groups; 65 unsigned int rsv_gdb; 66 67 /* We set it at 1024x the current filesystem size, or 68 * the upper block count limit (2^32), whichever is lower. 69 */ 70 if (ext2fs_blocks_count(sb) < max_blocks / 1024) 71 max_blocks = ext2fs_blocks_count(sb) * 1024; 72 /* 73 * ext2fs_div64_ceil() is unnecessary because max_blocks is 74 * max _GDT_ blocks, which is limited to 32 bits. 75 */ 76 rsv_groups = ext2fs_div_ceil(max_blocks - sb->s_first_data_block, bpg); 77 rsv_gdb = ext2fs_div_ceil(rsv_groups, gdpb) - fs->desc_blocks; 78 if (rsv_gdb > EXT2_ADDR_PER_BLOCK(sb)) 79 rsv_gdb = EXT2_ADDR_PER_BLOCK(sb); 80 #ifdef RES_GDT_DEBUG 81 printf("max_blocks %lu, rsv_groups = %lu, rsv_gdb = %u\n", 82 max_blocks, rsv_groups, rsv_gdb); 83 #endif 84 85 return rsv_gdb; 86 } 87 88 errcode_t ext2fs_initialize(const char *name, int flags, 89 struct ext2_super_block *param, 90 io_manager manager, ext2_filsys *ret_fs) 91 { 92 ext2_filsys fs; 93 errcode_t retval; 94 struct ext2_super_block *super; 95 unsigned int rem; 96 unsigned int overhead = 0; 97 unsigned int ipg; 98 dgrp_t i; 99 blk64_t free_blocks; 100 blk_t numblocks; 101 int rsv_gdt; 102 int csum_flag; 103 int bigalloc_flag; 104 int io_flags; 105 int has_bg; 106 unsigned reserved_inos; 107 char *buf = 0; 108 char c; 109 double reserved_ratio; 110 char *time_env; 111 112 if (!param || !ext2fs_blocks_count(param)) 113 return EXT2_ET_INVALID_ARGUMENT; 114 115 retval = ext2fs_get_mem(sizeof(struct struct_ext2_filsys), &fs); 116 if (retval) 117 return retval; 118 119 memset(fs, 0, sizeof(struct struct_ext2_filsys)); 120 fs->magic = EXT2_ET_MAGIC_EXT2FS_FILSYS; 121 fs->flags = flags | EXT2_FLAG_RW; 122 fs->umask = 022; 123 fs->default_bitmap_type = EXT2FS_BMAP64_RBTREE; 124 #ifdef WORDS_BIGENDIAN 125 fs->flags |= EXT2_FLAG_SWAP_BYTES; 126 #endif 127 128 time_env = getenv("E2FSPROGS_FAKE_TIME"); 129 if (time_env) 130 fs->now = strtoul(time_env, NULL, 0); 131 132 io_flags = IO_FLAG_RW; 133 if (flags & EXT2_FLAG_EXCLUSIVE) 134 io_flags |= IO_FLAG_EXCLUSIVE; 135 if (flags & EXT2_FLAG_DIRECT_IO) 136 io_flags |= IO_FLAG_DIRECT_IO; 137 io_flags |= O_BINARY; 138 retval = manager->open(name, io_flags, &fs->io); 139 if (retval) 140 goto cleanup; 141 fs->image_io = fs->io; 142 fs->io->app_data = fs; 143 retval = ext2fs_get_mem(strlen(name)+1, &fs->device_name); 144 if (retval) 145 goto cleanup; 146 147 strcpy(fs->device_name, name); 148 retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &super); 149 if (retval) 150 goto cleanup; 151 fs->super = super; 152 153 memset(super, 0, SUPERBLOCK_SIZE); 154 155 #define set_field(field, default) (super->field = param->field ? \ 156 param->field : (default)) 157 #define assign_field(field) (super->field = param->field) 158 159 super->s_magic = EXT2_SUPER_MAGIC; 160 super->s_state = EXT2_VALID_FS; 161 162 bigalloc_flag = ext2fs_has_feature_bigalloc(param); 163 164 assign_field(s_log_block_size); 165 166 if (bigalloc_flag) { 167 set_field(s_log_cluster_size, super->s_log_block_size+4); 168 if (super->s_log_block_size > super->s_log_cluster_size) { 169 retval = EXT2_ET_INVALID_ARGUMENT; 170 goto cleanup; 171 } 172 } else 173 super->s_log_cluster_size = super->s_log_block_size; 174 175 set_field(s_first_data_block, super->s_log_cluster_size ? 0 : 1); 176 set_field(s_max_mnt_count, 0); 177 set_field(s_errors, EXT2_ERRORS_DEFAULT); 178 set_field(s_feature_compat, 0); 179 set_field(s_feature_incompat, 0); 180 set_field(s_feature_ro_compat, 0); 181 set_field(s_default_mount_opts, 0); 182 set_field(s_first_meta_bg, 0); 183 set_field(s_raid_stride, 0); /* default stride size: 0 */ 184 set_field(s_raid_stripe_width, 0); /* default stripe width: 0 */ 185 set_field(s_log_groups_per_flex, 0); 186 set_field(s_flags, 0); 187 assign_field(s_backup_bgs[0]); 188 assign_field(s_backup_bgs[1]); 189 190 assign_field(s_encoding); 191 assign_field(s_encoding_flags); 192 193 if (ext2fs_has_feature_casefold(param)) 194 fs->encoding = ext2fs_load_nls_table(param->s_encoding); 195 196 if (super->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP) { 197 retval = EXT2_ET_UNSUPP_FEATURE; 198 goto cleanup; 199 } 200 if (super->s_feature_ro_compat & ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP) { 201 retval = EXT2_ET_RO_UNSUPP_FEATURE; 202 goto cleanup; 203 } 204 205 set_field(s_rev_level, EXT2_GOOD_OLD_REV); 206 if (super->s_rev_level >= EXT2_DYNAMIC_REV) { 207 set_field(s_first_ino, EXT2_GOOD_OLD_FIRST_INO); 208 set_field(s_inode_size, EXT2_GOOD_OLD_INODE_SIZE); 209 if (super->s_inode_size >= sizeof(struct ext2_inode_large)) { 210 int extra_isize = sizeof(struct ext2_inode_large) - 211 EXT2_GOOD_OLD_INODE_SIZE; 212 set_field(s_min_extra_isize, extra_isize); 213 set_field(s_want_extra_isize, extra_isize); 214 } 215 } else { 216 super->s_first_ino = EXT2_GOOD_OLD_FIRST_INO; 217 super->s_inode_size = EXT2_GOOD_OLD_INODE_SIZE; 218 } 219 220 set_field(s_checkinterval, 0); 221 super->s_mkfs_time = super->s_lastcheck = fs->now ? fs->now : time(NULL); 222 223 super->s_creator_os = CREATOR_OS; 224 225 fs->fragsize = fs->blocksize = EXT2_BLOCK_SIZE(super); 226 fs->cluster_ratio_bits = super->s_log_cluster_size - 227 super->s_log_block_size; 228 229 if (bigalloc_flag) { 230 unsigned long long bpg; 231 232 if (param->s_blocks_per_group && 233 param->s_clusters_per_group && 234 ((param->s_clusters_per_group * EXT2FS_CLUSTER_RATIO(fs)) != 235 param->s_blocks_per_group)) { 236 retval = EXT2_ET_INVALID_ARGUMENT; 237 goto cleanup; 238 } 239 if (param->s_clusters_per_group) 240 assign_field(s_clusters_per_group); 241 else if (param->s_blocks_per_group) 242 super->s_clusters_per_group = 243 param->s_blocks_per_group / 244 EXT2FS_CLUSTER_RATIO(fs); 245 else if (super->s_log_cluster_size + 15 < 32) 246 super->s_clusters_per_group = fs->blocksize * 8; 247 else 248 super->s_clusters_per_group = (fs->blocksize - 1) * 8; 249 if (super->s_clusters_per_group > EXT2_MAX_CLUSTERS_PER_GROUP(super)) 250 super->s_clusters_per_group = EXT2_MAX_CLUSTERS_PER_GROUP(super); 251 bpg = EXT2FS_C2B(fs, 252 (unsigned long long) super->s_clusters_per_group); 253 if (bpg >= (((unsigned long long) 1) << 32)) { 254 retval = EXT2_ET_INVALID_ARGUMENT; 255 goto cleanup; 256 } 257 super->s_blocks_per_group = bpg; 258 } else { 259 set_field(s_blocks_per_group, fs->blocksize * 8); 260 if (super->s_blocks_per_group > EXT2_MAX_BLOCKS_PER_GROUP(super)) 261 super->s_blocks_per_group = EXT2_MAX_BLOCKS_PER_GROUP(super); 262 super->s_clusters_per_group = super->s_blocks_per_group; 263 } 264 265 ext2fs_blocks_count_set(super, ext2fs_blocks_count(param) & 266 ~((blk64_t) EXT2FS_CLUSTER_MASK(fs))); 267 ext2fs_r_blocks_count_set(super, ext2fs_r_blocks_count(param)); 268 if (ext2fs_r_blocks_count(super) >= ext2fs_blocks_count(param)) { 269 retval = EXT2_ET_INVALID_ARGUMENT; 270 goto cleanup; 271 } 272 273 set_field(s_mmp_update_interval, 0); 274 275 /* 276 * If we're creating an external journal device, we don't need 277 * to bother with the rest. 278 */ 279 if (ext2fs_has_feature_journal_dev(super)) { 280 fs->group_desc_count = 0; 281 ext2fs_mark_super_dirty(fs); 282 *ret_fs = fs; 283 return 0; 284 } 285 286 retry: 287 fs->group_desc_count = (dgrp_t) ext2fs_div64_ceil( 288 ext2fs_blocks_count(super) - super->s_first_data_block, 289 EXT2_BLOCKS_PER_GROUP(super)); 290 if (fs->group_desc_count == 0) { 291 retval = EXT2_ET_TOOSMALL; 292 goto cleanup; 293 } 294 295 set_field(s_desc_size, 296 ext2fs_has_feature_64bit(super) ? 297 EXT2_MIN_DESC_SIZE_64BIT : 0); 298 299 fs->desc_blocks = ext2fs_div_ceil(fs->group_desc_count, 300 EXT2_DESC_PER_BLOCK(super)); 301 302 i = fs->blocksize >= 4096 ? 1 : 4096 / fs->blocksize; 303 304 if (ext2fs_has_feature_64bit(super) && 305 (ext2fs_blocks_count(super) / i) >= (1ULL << 32)) 306 set_field(s_inodes_count, ~0U); 307 else 308 set_field(s_inodes_count, ext2fs_blocks_count(super) / i); 309 310 /* 311 * Make sure we have at least EXT2_FIRST_INO + 1 inodes, so 312 * that we have enough inodes for the filesystem(!) 313 */ 314 if (super->s_inodes_count < EXT2_FIRST_INODE(super)+1) 315 super->s_inodes_count = EXT2_FIRST_INODE(super)+1; 316 317 /* 318 * There should be at least as many inodes as the user 319 * requested. Figure out how many inodes per group that 320 * should be. But make sure that we don't allocate more than 321 * one bitmap's worth of inodes each group. 322 */ 323 ipg = ext2fs_div_ceil(super->s_inodes_count, fs->group_desc_count); 324 if (ipg > fs->blocksize * 8) { 325 if (!bigalloc_flag && super->s_blocks_per_group >= 256) { 326 /* Try again with slightly different parameters */ 327 super->s_blocks_per_group -= 8; 328 ext2fs_blocks_count_set(super, 329 ext2fs_blocks_count(param)); 330 super->s_clusters_per_group = super->s_blocks_per_group; 331 goto retry; 332 } else { 333 retval = EXT2_ET_TOO_MANY_INODES; 334 goto cleanup; 335 } 336 } 337 338 if (ipg > (unsigned) EXT2_MAX_INODES_PER_GROUP(super)) 339 ipg = EXT2_MAX_INODES_PER_GROUP(super); 340 341 ipg_retry: 342 super->s_inodes_per_group = ipg; 343 344 /* 345 * Make sure the number of inodes per group completely fills 346 * the inode table blocks in the descriptor. If not, add some 347 * additional inodes/group. Waste not, want not... 348 */ 349 fs->inode_blocks_per_group = (((super->s_inodes_per_group * 350 EXT2_INODE_SIZE(super)) + 351 EXT2_BLOCK_SIZE(super) - 1) / 352 EXT2_BLOCK_SIZE(super)); 353 super->s_inodes_per_group = ((fs->inode_blocks_per_group * 354 EXT2_BLOCK_SIZE(super)) / 355 EXT2_INODE_SIZE(super)); 356 /* 357 * Finally, make sure the number of inodes per group is a 358 * multiple of 8. This is needed to simplify the bitmap 359 * splicing code. 360 */ 361 if (super->s_inodes_per_group < 8) 362 super->s_inodes_per_group = 8; 363 super->s_inodes_per_group &= ~7; 364 fs->inode_blocks_per_group = (((super->s_inodes_per_group * 365 EXT2_INODE_SIZE(super)) + 366 EXT2_BLOCK_SIZE(super) - 1) / 367 EXT2_BLOCK_SIZE(super)); 368 369 /* 370 * adjust inode count to reflect the adjusted inodes_per_group 371 */ 372 if ((__u64)super->s_inodes_per_group * fs->group_desc_count > ~0U) { 373 ipg--; 374 goto ipg_retry; 375 } 376 super->s_inodes_count = super->s_inodes_per_group * 377 fs->group_desc_count; 378 super->s_free_inodes_count = super->s_inodes_count; 379 380 /* 381 * check the number of reserved group descriptor table blocks 382 */ 383 if (ext2fs_has_feature_resize_inode(super)) 384 rsv_gdt = calc_reserved_gdt_blocks(fs); 385 else 386 rsv_gdt = 0; 387 set_field(s_reserved_gdt_blocks, rsv_gdt); 388 if (super->s_reserved_gdt_blocks > EXT2_ADDR_PER_BLOCK(super)) { 389 retval = EXT2_ET_RES_GDT_BLOCKS; 390 goto cleanup; 391 } 392 /* Enable meta_bg if we'd lose more than 3/4 of a BG to GDT blocks. */ 393 if (super->s_reserved_gdt_blocks + fs->desc_blocks > 394 super->s_blocks_per_group * 3 / 4) { 395 ext2fs_set_feature_meta_bg(fs->super); 396 ext2fs_clear_feature_resize_inode(fs->super); 397 set_field(s_reserved_gdt_blocks, 0); 398 } 399 400 /* 401 * Calculate the maximum number of bookkeeping blocks per 402 * group. It includes the superblock, the block group 403 * descriptors, the block bitmap, the inode bitmap, the inode 404 * table, and the reserved gdt blocks. 405 */ 406 overhead = (int) (3 + fs->inode_blocks_per_group + 407 super->s_reserved_gdt_blocks); 408 409 if (ext2fs_has_feature_meta_bg(fs->super)) 410 overhead++; 411 else 412 overhead += fs->desc_blocks; 413 414 /* This can only happen if the user requested too many inodes */ 415 if (overhead > super->s_blocks_per_group) { 416 retval = EXT2_ET_TOO_MANY_INODES; 417 goto cleanup; 418 } 419 420 /* 421 * See if the last group is big enough to support the 422 * necessary data structures. If not, we need to get rid of 423 * it. We need to recalculate the overhead for the last block 424 * group, since it might or might not have a superblock 425 * backup. 426 */ 427 overhead = (int) (2 + fs->inode_blocks_per_group); 428 has_bg = 0; 429 if (ext2fs_has_feature_sparse_super2(super)) { 430 /* 431 * We have to do this manually since 432 * super->s_backup_bgs hasn't been set up yet. 433 */ 434 if (fs->group_desc_count == 2) 435 has_bg = param->s_backup_bgs[0] != 0; 436 else 437 has_bg = param->s_backup_bgs[1] != 0; 438 } else 439 has_bg = ext2fs_bg_has_super(fs, fs->group_desc_count - 1); 440 if (has_bg) 441 overhead += 1 + fs->desc_blocks + super->s_reserved_gdt_blocks; 442 rem = ((ext2fs_blocks_count(super) - super->s_first_data_block) % 443 super->s_blocks_per_group); 444 if ((fs->group_desc_count == 1) && rem && (rem < overhead)) { 445 retval = EXT2_ET_TOOSMALL; 446 goto cleanup; 447 } 448 if (rem && (rem < overhead+50)) { 449 ext2fs_blocks_count_set(super, ext2fs_blocks_count(super) - 450 rem); 451 /* 452 * If blocks count is changed, we need to recalculate 453 * reserved blocks count not to exceed 50%. 454 */ 455 reserved_ratio = 100.0 * ext2fs_r_blocks_count(param) / 456 ext2fs_blocks_count(param); 457 ext2fs_r_blocks_count_set(super, reserved_ratio * 458 ext2fs_blocks_count(super) / 100.0); 459 460 goto retry; 461 } 462 463 /* 464 * At this point we know how big the filesystem will be. So 465 * we can do any and all allocations that depend on the block 466 * count. 467 */ 468 469 /* Set up the locations of the backup superblocks */ 470 if (ext2fs_has_feature_sparse_super2(super)) { 471 if (super->s_backup_bgs[0] >= fs->group_desc_count) 472 super->s_backup_bgs[0] = fs->group_desc_count - 1; 473 if (super->s_backup_bgs[1] >= fs->group_desc_count) 474 super->s_backup_bgs[1] = fs->group_desc_count - 1; 475 if (super->s_backup_bgs[0] == super->s_backup_bgs[1]) 476 super->s_backup_bgs[1] = 0; 477 if (super->s_backup_bgs[0] > super->s_backup_bgs[1]) { 478 __u32 t = super->s_backup_bgs[0]; 479 super->s_backup_bgs[0] = super->s_backup_bgs[1]; 480 super->s_backup_bgs[1] = t; 481 } 482 } 483 484 retval = ext2fs_get_mem(strlen(fs->device_name) + 80, &buf); 485 if (retval) 486 goto cleanup; 487 488 strcpy(buf, "block bitmap for "); 489 strcat(buf, fs->device_name); 490 retval = ext2fs_allocate_subcluster_bitmap(fs, buf, &fs->block_map); 491 if (retval) 492 goto cleanup; 493 494 strcpy(buf, "inode bitmap for "); 495 strcat(buf, fs->device_name); 496 retval = ext2fs_allocate_inode_bitmap(fs, buf, &fs->inode_map); 497 if (retval) 498 goto cleanup; 499 500 ext2fs_free_mem(&buf); 501 502 retval = ext2fs_get_array(fs->desc_blocks, fs->blocksize, 503 &fs->group_desc); 504 if (retval) 505 goto cleanup; 506 507 memset(fs->group_desc, 0, (size_t) fs->desc_blocks * fs->blocksize); 508 509 /* 510 * Reserve the superblock and group descriptors for each 511 * group, and fill in the correct group statistics for group. 512 * Note that although the block bitmap, inode bitmap, and 513 * inode table have not been allocated (and in fact won't be 514 * by this routine), they are accounted for nevertheless. 515 * 516 * If FLEX_BG meta-data grouping is used, only account for the 517 * superblock and group descriptors (the inode tables and 518 * bitmaps will be accounted for when allocated). 519 */ 520 free_blocks = 0; 521 csum_flag = ext2fs_has_group_desc_csum(fs); 522 reserved_inos = super->s_first_ino; 523 for (i = 0; i < fs->group_desc_count; i++) { 524 /* 525 * Don't set the BLOCK_UNINIT group for the last group 526 * because the block bitmap needs to be padded. 527 */ 528 if (csum_flag) { 529 if (i != fs->group_desc_count - 1) 530 ext2fs_bg_flags_set(fs, i, 531 EXT2_BG_BLOCK_UNINIT); 532 ext2fs_bg_flags_set(fs, i, EXT2_BG_INODE_UNINIT); 533 numblocks = super->s_inodes_per_group; 534 if (reserved_inos) { 535 if (numblocks > reserved_inos) { 536 numblocks -= reserved_inos; 537 reserved_inos = 0; 538 } else { 539 reserved_inos -= numblocks; 540 numblocks = 0; 541 } 542 } 543 ext2fs_bg_itable_unused_set(fs, i, numblocks); 544 } 545 numblocks = ext2fs_reserve_super_and_bgd(fs, i, fs->block_map); 546 if (fs->super->s_log_groups_per_flex) 547 numblocks += 2 + fs->inode_blocks_per_group; 548 549 free_blocks += numblocks; 550 ext2fs_bg_free_blocks_count_set(fs, i, numblocks); 551 ext2fs_bg_free_inodes_count_set(fs, i, fs->super->s_inodes_per_group); 552 ext2fs_bg_used_dirs_count_set(fs, i, 0); 553 ext2fs_group_desc_csum_set(fs, i); 554 } 555 free_blocks &= ~EXT2FS_CLUSTER_MASK(fs); 556 ext2fs_free_blocks_count_set(super, free_blocks); 557 558 c = (char) 255; 559 if (((int) c) == -1) { 560 super->s_flags |= EXT2_FLAGS_SIGNED_HASH; 561 } else { 562 super->s_flags |= EXT2_FLAGS_UNSIGNED_HASH; 563 } 564 565 ext2fs_mark_super_dirty(fs); 566 ext2fs_mark_bb_dirty(fs); 567 ext2fs_mark_ib_dirty(fs); 568 569 io_channel_set_blksize(fs->io, fs->blocksize); 570 571 *ret_fs = fs; 572 return 0; 573 cleanup: 574 free(buf); 575 ext2fs_free(fs); 576 return retval; 577 } 578 579 errcode_t ext2fs_calculate_summary_stats(ext2_filsys fs, int super_only) 580 { 581 blk64_t blk; 582 ext2_ino_t ino; 583 unsigned int group = 0; 584 unsigned int count = 0; 585 int total_free = 0; 586 int group_free = 0; 587 int last_allocated = 0; 588 int uninit; 589 590 /* 591 * First calculate the block statistics 592 */ 593 uninit = 1; 594 for (blk = fs->super->s_first_data_block; 595 blk < ext2fs_blocks_count(fs->super); blk++) { 596 if (!ext2fs_fast_test_block_bitmap2(fs->block_map, blk)) { 597 group_free++; 598 total_free++; 599 } else { 600 uninit = 0; 601 } 602 count++; 603 if ((count == fs->super->s_blocks_per_group) || 604 (blk == ext2fs_blocks_count(fs->super)-1)) { 605 ext2fs_bg_free_blocks_count_set(fs, group, 606 group_free); 607 if (!super_only) { 608 if (uninit && blk != 609 ext2fs_blocks_count(fs->super) - 1) 610 ext2fs_bg_flags_set(fs, group, 611 EXT2_BG_BLOCK_UNINIT); 612 else 613 ext2fs_bg_flags_clear(fs, group, 614 EXT2_BG_BLOCK_UNINIT); 615 } 616 count = 0; 617 group_free = 0; 618 uninit = 1; 619 group++; 620 } 621 } 622 total_free = EXT2FS_C2B(fs, total_free); 623 ext2fs_free_blocks_count_set(fs->super, total_free); 624 625 /* 626 * Next, calculate the inode statistics 627 */ 628 group_free = 0; 629 total_free = 0; 630 last_allocated = 0; 631 count = 0; 632 group = 0; 633 634 /* Protect loop from wrap-around if s_inodes_count maxed */ 635 for (ino = 1; ino <= fs->super->s_inodes_count && ino > 0; ino++) { 636 if (!ext2fs_test_inode_bitmap2(fs->inode_map, ino)) { 637 group_free++; 638 total_free++; 639 } else { 640 last_allocated = ino; 641 } 642 count++; 643 if ((count == fs->super->s_inodes_per_group) || 644 (ino == fs->super->s_inodes_count)) { 645 if (!super_only) { 646 if (last_allocated) { 647 ext2fs_bg_flags_clear(fs, group, 648 EXT2_BG_INODE_UNINIT); 649 ext2fs_bg_itable_unused_set(fs, group, 650 fs->super->s_inodes_per_group - 651 (last_allocated % 652 fs->super->s_inodes_per_group)); 653 } else { 654 ext2fs_bg_flags_set(fs, group, 655 EXT2_BG_INODE_UNINIT); 656 ext2fs_bg_itable_unused_set(fs, group, 657 0); 658 } 659 ext2fs_bg_free_inodes_count_set(fs, group, 660 group_free); 661 } 662 group++; 663 count = 0; 664 group_free = 0; 665 last_allocated = 0; 666 } 667 } 668 fs->super->s_free_inodes_count = total_free; 669 ext2fs_mark_super_dirty(fs); 670 return 0; 671 }