ext2fs.h revision abf23439d51a3ddbca475b931abebd381ff7ceea
1/* 2 * ext2fs.h --- ext2fs 3 * 4 * Copyright (C) 1993, 1994, 1995, 1996 Theodore Ts'o. 5 * 6 * %Begin-Header% 7 * This file may be redistributed under the terms of the GNU Public 8 * License. 9 * %End-Header% 10 */ 11 12#ifndef _EXT2FS_EXT2FS_H 13#define _EXT2FS_EXT2FS_H 14 15#ifdef __GNUC__ 16#define EXT2FS_ATTR(x) __attribute__(x) 17#else 18#define EXT2FS_ATTR(x) 19#endif 20 21#ifdef __cplusplus 22extern "C" { 23#endif 24 25/* 26 * Non-GNU C compilers won't necessarily understand inline 27 */ 28#if (!defined(__GNUC__) && !defined(__WATCOMC__)) 29#define NO_INLINE_FUNCS 30#endif 31 32/* 33 * Build in support for byte-swapping filesystems if we the feature 34 * has been configured or if we're being built on a CPU architecture 35 * with a non-native byte order. 36 */ 37#if defined(ENABLE_SWAPFS) || defined(WORDS_BIGENDIAN) 38#define EXT2FS_ENABLE_SWAPFS 39#endif 40 41/* 42 * Where the master copy of the superblock is located, and how big 43 * superblocks are supposed to be. We define SUPERBLOCK_SIZE because 44 * the size of the superblock structure is not necessarily trustworthy 45 * (some versions have the padding set up so that the superblock is 46 * 1032 bytes long). 47 */ 48#define SUPERBLOCK_OFFSET 1024 49#define SUPERBLOCK_SIZE 1024 50 51/* 52 * The last ext2fs revision level that this version of the library is 53 * able to support. 54 */ 55#define EXT2_LIB_CURRENT_REV EXT2_DYNAMIC_REV 56 57#ifdef HAVE_SYS_TYPES_H 58#include <sys/types.h> 59#endif 60 61#include <stdio.h> 62#include <stdlib.h> 63#include <string.h> 64 65#if EXT2_FLAT_INCLUDES 66#include "e2_types.h" 67#include "ext2_fs.h" 68#else 69#include <ext2fs/ext2_types.h> 70#include <ext2fs/ext2_fs.h> 71#endif /* EXT2_FLAT_INCLUDES */ 72 73typedef __u32 ext2_ino_t; 74typedef __u32 blk_t; 75typedef __u32 dgrp_t; 76typedef __u32 ext2_off_t; 77typedef __s64 e2_blkcnt_t; 78typedef __u32 ext2_dirhash_t; 79 80#if EXT2_FLAT_INCLUDES 81#include "com_err.h" 82#include "ext2_io.h" 83#include "ext2_err.h" 84#else 85#include <et/com_err.h> 86#include <ext2fs/ext2_io.h> 87#include <ext2fs/ext2_err.h> 88#endif 89 90/* 91 * Portability help for Microsoft Visual C++ 92 */ 93#ifdef _MSC_VER 94#define EXT2_QSORT_TYPE int __cdecl 95#else 96#define EXT2_QSORT_TYPE int 97#endif 98 99typedef struct struct_ext2_filsys *ext2_filsys; 100 101struct ext2fs_struct_generic_bitmap { 102 errcode_t magic; 103 ext2_filsys fs; 104 __u32 start, end; 105 __u32 real_end; 106 char * description; 107 char * bitmap; 108 errcode_t base_error_code; 109 __u32 reserved[7]; 110}; 111 112#define EXT2FS_MARK_ERROR 0 113#define EXT2FS_UNMARK_ERROR 1 114#define EXT2FS_TEST_ERROR 2 115 116typedef struct ext2fs_struct_generic_bitmap *ext2fs_generic_bitmap; 117typedef struct ext2fs_struct_generic_bitmap *ext2fs_inode_bitmap; 118typedef struct ext2fs_struct_generic_bitmap *ext2fs_block_bitmap; 119 120#define EXT2_FIRST_INODE(s) EXT2_FIRST_INO(s) 121 122 123/* 124 * Badblocks list definitions 125 */ 126 127typedef struct ext2_struct_u32_list *ext2_badblocks_list; 128typedef struct ext2_struct_u32_iterate *ext2_badblocks_iterate; 129 130typedef struct ext2_struct_u32_list *ext2_u32_list; 131typedef struct ext2_struct_u32_iterate *ext2_u32_iterate; 132 133/* old */ 134typedef struct ext2_struct_u32_list *badblocks_list; 135typedef struct ext2_struct_u32_iterate *badblocks_iterate; 136 137#define BADBLOCKS_FLAG_DIRTY 1 138 139/* 140 * ext2_dblist structure and abstractions (see dblist.c) 141 */ 142struct ext2_db_entry { 143 ext2_ino_t ino; 144 blk_t blk; 145 int blockcnt; 146}; 147 148typedef struct ext2_struct_dblist *ext2_dblist; 149 150#define DBLIST_ABORT 1 151 152/* 153 * ext2_fileio definitions 154 */ 155 156#define EXT2_FILE_WRITE 0x0001 157#define EXT2_FILE_CREATE 0x0002 158 159#define EXT2_FILE_MASK 0x00FF 160 161#define EXT2_FILE_BUF_DIRTY 0x4000 162#define EXT2_FILE_BUF_VALID 0x2000 163 164typedef struct ext2_file *ext2_file_t; 165 166#define EXT2_SEEK_SET 0 167#define EXT2_SEEK_CUR 1 168#define EXT2_SEEK_END 2 169 170/* 171 * Flags for the ext2_filsys structure and for ext2fs_open() 172 */ 173#define EXT2_FLAG_RW 0x01 174#define EXT2_FLAG_CHANGED 0x02 175#define EXT2_FLAG_DIRTY 0x04 176#define EXT2_FLAG_VALID 0x08 177#define EXT2_FLAG_IB_DIRTY 0x10 178#define EXT2_FLAG_BB_DIRTY 0x20 179#define EXT2_FLAG_SWAP_BYTES 0x40 180#define EXT2_FLAG_SWAP_BYTES_READ 0x80 181#define EXT2_FLAG_SWAP_BYTES_WRITE 0x100 182#define EXT2_FLAG_MASTER_SB_ONLY 0x200 183#define EXT2_FLAG_FORCE 0x400 184#define EXT2_FLAG_SUPER_ONLY 0x800 185#define EXT2_FLAG_JOURNAL_DEV_OK 0x1000 186#define EXT2_FLAG_IMAGE_FILE 0x2000 187#define EXT2_FLAG_EXCLUSIVE 0x4000 188 189/* 190 * Special flag in the ext2 inode i_flag field that means that this is 191 * a new inode. (So that ext2_write_inode() can clear extra fields.) 192 */ 193#define EXT2_NEW_INODE_FL 0x80000000 194 195/* 196 * Flags for mkjournal 197 * 198 * EXT2_MKJOURNAL_V1_SUPER Make a (deprecated) V1 journal superblock 199 */ 200#define EXT2_MKJOURNAL_V1_SUPER 0x0000001 201 202struct struct_ext2_filsys { 203 errcode_t magic; 204 io_channel io; 205 int flags; 206 char * device_name; 207 struct ext2_super_block * super; 208 unsigned int blocksize; 209 int fragsize; 210 dgrp_t group_desc_count; 211 unsigned long desc_blocks; 212 struct ext2_group_desc * group_desc; 213 int inode_blocks_per_group; 214 ext2fs_inode_bitmap inode_map; 215 ext2fs_block_bitmap block_map; 216 errcode_t (*get_blocks)(ext2_filsys fs, ext2_ino_t ino, blk_t *blocks); 217 errcode_t (*check_directory)(ext2_filsys fs, ext2_ino_t ino); 218 errcode_t (*write_bitmaps)(ext2_filsys fs); 219 errcode_t (*read_inode)(ext2_filsys fs, ext2_ino_t ino, 220 struct ext2_inode *inode); 221 errcode_t (*write_inode)(ext2_filsys fs, ext2_ino_t ino, 222 struct ext2_inode *inode); 223 ext2_badblocks_list badblocks; 224 ext2_dblist dblist; 225 __u32 stride; /* for mke2fs */ 226 struct ext2_super_block * orig_super; 227 struct ext2_image_hdr * image_header; 228 __u32 umask; 229 time_t now; 230 /* 231 * Reserved for future expansion 232 */ 233 __u32 reserved[7]; 234 235 /* 236 * Reserved for the use of the calling application. 237 */ 238 void * priv_data; 239 240 /* 241 * Inode cache 242 */ 243 struct ext2_inode_cache *icache; 244 io_channel image_io; 245}; 246 247#if EXT2_FLAT_INCLUDES 248#include "e2_bitops.h" 249#else 250#include <ext2fs/bitops.h> 251#endif 252 253/* 254 * Return flags for the block iterator functions 255 */ 256#define BLOCK_CHANGED 1 257#define BLOCK_ABORT 2 258#define BLOCK_ERROR 4 259 260/* 261 * Block interate flags 262 * 263 * BLOCK_FLAG_APPEND, or BLOCK_FLAG_HOLE, indicates that the interator 264 * function should be called on blocks where the block number is zero. 265 * This is used by ext2fs_expand_dir() to be able to add a new block 266 * to an inode. It can also be used for programs that want to be able 267 * to deal with files that contain "holes". 268 * 269 * BLOCK_FLAG_DEPTH_TRAVERSE indicates that the iterator function for 270 * the indirect, doubly indirect, etc. blocks should be called after 271 * all of the blocks containined in the indirect blocks are processed. 272 * This is useful if you are going to be deallocating blocks from an 273 * inode. 274 * 275 * BLOCK_FLAG_DATA_ONLY indicates that the iterator function should be 276 * called for data blocks only. 277 * 278 * BLOCK_FLAG_NO_LARGE is for internal use only. It informs 279 * ext2fs_block_iterate2 that large files won't be accepted. 280 */ 281#define BLOCK_FLAG_APPEND 1 282#define BLOCK_FLAG_HOLE 1 283#define BLOCK_FLAG_DEPTH_TRAVERSE 2 284#define BLOCK_FLAG_DATA_ONLY 4 285 286#define BLOCK_FLAG_NO_LARGE 0x1000 287 288/* 289 * Magic "block count" return values for the block iterator function. 290 */ 291#define BLOCK_COUNT_IND (-1) 292#define BLOCK_COUNT_DIND (-2) 293#define BLOCK_COUNT_TIND (-3) 294#define BLOCK_COUNT_TRANSLATOR (-4) 295 296#if 0 297/* 298 * Flags for ext2fs_move_blocks 299 */ 300#define EXT2_BMOVE_GET_DBLIST 0x0001 301#define EXT2_BMOVE_DEBUG 0x0002 302#endif 303 304/* 305 * Flags for directory block reading and writing functions 306 */ 307#define EXT2_DIRBLOCK_V2_STRUCT 0x0001 308 309/* 310 * Return flags for the directory iterator functions 311 */ 312#define DIRENT_CHANGED 1 313#define DIRENT_ABORT 2 314#define DIRENT_ERROR 3 315 316/* 317 * Directory iterator flags 318 */ 319 320#define DIRENT_FLAG_INCLUDE_EMPTY 1 321#define DIRENT_FLAG_INCLUDE_REMOVED 2 322 323#define DIRENT_DOT_FILE 1 324#define DIRENT_DOT_DOT_FILE 2 325#define DIRENT_OTHER_FILE 3 326#define DIRENT_DELETED_FILE 4 327 328/* 329 * Inode scan definitions 330 */ 331typedef struct ext2_struct_inode_scan *ext2_inode_scan; 332 333/* 334 * ext2fs_scan flags 335 */ 336#define EXT2_SF_CHK_BADBLOCKS 0x0001 337#define EXT2_SF_BAD_INODE_BLK 0x0002 338#define EXT2_SF_BAD_EXTRA_BYTES 0x0004 339#define EXT2_SF_SKIP_MISSING_ITABLE 0x0008 340#define EXT2_SF_DO_LAZY 0x0010 341 342/* 343 * ext2fs_check_if_mounted flags 344 */ 345#define EXT2_MF_MOUNTED 1 346#define EXT2_MF_ISROOT 2 347#define EXT2_MF_READONLY 4 348#define EXT2_MF_SWAP 8 349#define EXT2_MF_BUSY 16 350 351/* 352 * Ext2/linux mode flags. We define them here so that we don't need 353 * to depend on the OS's sys/stat.h, since we may be compiling on a 354 * non-Linux system. 355 */ 356#define LINUX_S_IFMT 00170000 357#define LINUX_S_IFSOCK 0140000 358#define LINUX_S_IFLNK 0120000 359#define LINUX_S_IFREG 0100000 360#define LINUX_S_IFBLK 0060000 361#define LINUX_S_IFDIR 0040000 362#define LINUX_S_IFCHR 0020000 363#define LINUX_S_IFIFO 0010000 364#define LINUX_S_ISUID 0004000 365#define LINUX_S_ISGID 0002000 366#define LINUX_S_ISVTX 0001000 367 368#define LINUX_S_IRWXU 00700 369#define LINUX_S_IRUSR 00400 370#define LINUX_S_IWUSR 00200 371#define LINUX_S_IXUSR 00100 372 373#define LINUX_S_IRWXG 00070 374#define LINUX_S_IRGRP 00040 375#define LINUX_S_IWGRP 00020 376#define LINUX_S_IXGRP 00010 377 378#define LINUX_S_IRWXO 00007 379#define LINUX_S_IROTH 00004 380#define LINUX_S_IWOTH 00002 381#define LINUX_S_IXOTH 00001 382 383#define LINUX_S_ISLNK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFLNK) 384#define LINUX_S_ISREG(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFREG) 385#define LINUX_S_ISDIR(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFDIR) 386#define LINUX_S_ISCHR(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFCHR) 387#define LINUX_S_ISBLK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFBLK) 388#define LINUX_S_ISFIFO(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFIFO) 389#define LINUX_S_ISSOCK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFSOCK) 390 391/* 392 * ext2 size of an inode 393 */ 394#define EXT2_I_SIZE(i) ((i)->i_size | ((__u64) (i)->i_size_high << 32)) 395 396/* 397 * ext2_icount_t abstraction 398 */ 399#define EXT2_ICOUNT_OPT_INCREMENT 0x01 400 401typedef struct ext2_icount *ext2_icount_t; 402 403/* 404 * Flags for ext2fs_bmap 405 */ 406#define BMAP_ALLOC 0x0001 407#define BMAP_SET 0x0002 408 409/* 410 * Flags for imager.c functions 411 */ 412#define IMAGER_FLAG_INODEMAP 1 413#define IMAGER_FLAG_SPARSEWRITE 2 414 415/* 416 * For checking structure magic numbers... 417 */ 418 419#define EXT2_CHECK_MAGIC(struct, code) \ 420 if ((struct)->magic != (code)) return (code) 421 422 423/* 424 * For ext2 compression support 425 */ 426#define EXT2FS_COMPRESSED_BLKADDR ((blk_t) 0xffffffff) 427#define HOLE_BLKADDR(_b) ((_b) == 0 || (_b) == EXT2FS_COMPRESSED_BLKADDR) 428 429/* 430 * Features supported by this version of the library 431 */ 432#define EXT2_LIB_FEATURE_COMPAT_SUPP (EXT2_FEATURE_COMPAT_DIR_PREALLOC|\ 433 EXT2_FEATURE_COMPAT_IMAGIC_INODES|\ 434 EXT3_FEATURE_COMPAT_HAS_JOURNAL|\ 435 EXT2_FEATURE_COMPAT_RESIZE_INODE|\ 436 EXT2_FEATURE_COMPAT_DIR_INDEX|\ 437 EXT2_FEATURE_COMPAT_LAZY_BG|\ 438 EXT2_FEATURE_COMPAT_EXT_ATTR) 439 440/* This #ifdef is temporary until compression is fully supported */ 441#ifdef ENABLE_COMPRESSION 442#ifndef I_KNOW_THAT_COMPRESSION_IS_EXPERIMENTAL 443/* If the below warning bugs you, then have 444 `CPPFLAGS=-DI_KNOW_THAT_COMPRESSION_IS_EXPERIMENTAL' in your 445 environment at configure time. */ 446 #warning "Compression support is experimental" 447#endif 448#define EXT2_LIB_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE|\ 449 EXT2_FEATURE_INCOMPAT_COMPRESSION|\ 450 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV|\ 451 EXT2_FEATURE_INCOMPAT_META_BG|\ 452 EXT3_FEATURE_INCOMPAT_RECOVER) 453#else 454#define EXT2_LIB_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE|\ 455 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV|\ 456 EXT2_FEATURE_INCOMPAT_META_BG|\ 457 EXT3_FEATURE_INCOMPAT_RECOVER) 458#endif 459#define EXT2_LIB_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER|\ 460 EXT2_FEATURE_RO_COMPAT_LARGE_FILE) 461/* 462 * function prototypes 463 */ 464 465/* alloc.c */ 466extern errcode_t ext2fs_new_inode(ext2_filsys fs, ext2_ino_t dir, int mode, 467 ext2fs_inode_bitmap map, ext2_ino_t *ret); 468extern errcode_t ext2fs_new_block(ext2_filsys fs, blk_t goal, 469 ext2fs_block_bitmap map, blk_t *ret); 470extern errcode_t ext2fs_get_free_blocks(ext2_filsys fs, blk_t start, 471 blk_t finish, int num, 472 ext2fs_block_bitmap map, 473 blk_t *ret); 474extern errcode_t ext2fs_alloc_block(ext2_filsys fs, blk_t goal, 475 char *block_buf, blk_t *ret); 476 477/* alloc_sb.c */ 478extern int ext2fs_reserve_super_and_bgd(ext2_filsys fs, 479 dgrp_t group, 480 ext2fs_block_bitmap bmap); 481 482/* alloc_stats.c */ 483void ext2fs_inode_alloc_stats(ext2_filsys fs, ext2_ino_t ino, int inuse); 484void ext2fs_inode_alloc_stats2(ext2_filsys fs, ext2_ino_t ino, 485 int inuse, int isdir); 486void ext2fs_block_alloc_stats(ext2_filsys fs, blk_t blk, int inuse); 487 488/* alloc_tables.c */ 489extern errcode_t ext2fs_allocate_tables(ext2_filsys fs); 490extern errcode_t ext2fs_allocate_group_table(ext2_filsys fs, dgrp_t group, 491 ext2fs_block_bitmap bmap); 492 493/* badblocks.c */ 494extern errcode_t ext2fs_u32_list_create(ext2_u32_list *ret, int size); 495extern errcode_t ext2fs_u32_list_add(ext2_u32_list bb, __u32 blk); 496extern int ext2fs_u32_list_find(ext2_u32_list bb, __u32 blk); 497extern int ext2fs_u32_list_test(ext2_u32_list bb, blk_t blk); 498extern errcode_t ext2fs_u32_list_iterate_begin(ext2_u32_list bb, 499 ext2_u32_iterate *ret); 500extern int ext2fs_u32_list_iterate(ext2_u32_iterate iter, blk_t *blk); 501extern void ext2fs_u32_list_iterate_end(ext2_u32_iterate iter); 502extern errcode_t ext2fs_u32_copy(ext2_u32_list src, ext2_u32_list *dest); 503extern int ext2fs_u32_list_equal(ext2_u32_list bb1, ext2_u32_list bb2); 504 505extern errcode_t ext2fs_badblocks_list_create(ext2_badblocks_list *ret, 506 int size); 507extern errcode_t ext2fs_badblocks_list_add(ext2_badblocks_list bb, 508 blk_t blk); 509extern int ext2fs_badblocks_list_test(ext2_badblocks_list bb, 510 blk_t blk); 511extern int ext2fs_u32_list_del(ext2_u32_list bb, __u32 blk); 512extern void ext2fs_badblocks_list_del(ext2_u32_list bb, __u32 blk); 513extern errcode_t 514 ext2fs_badblocks_list_iterate_begin(ext2_badblocks_list bb, 515 ext2_badblocks_iterate *ret); 516extern int ext2fs_badblocks_list_iterate(ext2_badblocks_iterate iter, 517 blk_t *blk); 518extern void ext2fs_badblocks_list_iterate_end(ext2_badblocks_iterate iter); 519extern errcode_t ext2fs_badblocks_copy(ext2_badblocks_list src, 520 ext2_badblocks_list *dest); 521extern int ext2fs_badblocks_equal(ext2_badblocks_list bb1, 522 ext2_badblocks_list bb2); 523extern int ext2fs_u32_list_count(ext2_u32_list bb); 524 525/* bb_compat */ 526extern errcode_t badblocks_list_create(badblocks_list *ret, int size); 527extern errcode_t badblocks_list_add(badblocks_list bb, blk_t blk); 528extern int badblocks_list_test(badblocks_list bb, blk_t blk); 529extern errcode_t badblocks_list_iterate_begin(badblocks_list bb, 530 badblocks_iterate *ret); 531extern int badblocks_list_iterate(badblocks_iterate iter, blk_t *blk); 532extern void badblocks_list_iterate_end(badblocks_iterate iter); 533extern void badblocks_list_free(badblocks_list bb); 534 535/* bb_inode.c */ 536extern errcode_t ext2fs_update_bb_inode(ext2_filsys fs, 537 ext2_badblocks_list bb_list); 538 539/* bitmaps.c */ 540extern errcode_t ext2fs_write_inode_bitmap(ext2_filsys fs); 541extern errcode_t ext2fs_write_block_bitmap (ext2_filsys fs); 542extern errcode_t ext2fs_read_inode_bitmap (ext2_filsys fs); 543extern errcode_t ext2fs_read_block_bitmap(ext2_filsys fs); 544extern errcode_t ext2fs_allocate_generic_bitmap(__u32 start, 545 __u32 end, 546 __u32 real_end, 547 const char *descr, 548 ext2fs_generic_bitmap *ret); 549extern errcode_t ext2fs_allocate_block_bitmap(ext2_filsys fs, 550 const char *descr, 551 ext2fs_block_bitmap *ret); 552extern errcode_t ext2fs_allocate_inode_bitmap(ext2_filsys fs, 553 const char *descr, 554 ext2fs_inode_bitmap *ret); 555extern errcode_t ext2fs_fudge_inode_bitmap_end(ext2fs_inode_bitmap bitmap, 556 ext2_ino_t end, ext2_ino_t *oend); 557extern errcode_t ext2fs_fudge_block_bitmap_end(ext2fs_block_bitmap bitmap, 558 blk_t end, blk_t *oend); 559extern void ext2fs_clear_inode_bitmap(ext2fs_inode_bitmap bitmap); 560extern void ext2fs_clear_block_bitmap(ext2fs_block_bitmap bitmap); 561extern errcode_t ext2fs_read_bitmaps(ext2_filsys fs); 562extern errcode_t ext2fs_write_bitmaps(ext2_filsys fs); 563 564/* block.c */ 565extern errcode_t ext2fs_block_iterate(ext2_filsys fs, 566 ext2_ino_t ino, 567 int flags, 568 char *block_buf, 569 int (*func)(ext2_filsys fs, 570 blk_t *blocknr, 571 int blockcnt, 572 void *priv_data), 573 void *priv_data); 574errcode_t ext2fs_block_iterate2(ext2_filsys fs, 575 ext2_ino_t ino, 576 int flags, 577 char *block_buf, 578 int (*func)(ext2_filsys fs, 579 blk_t *blocknr, 580 e2_blkcnt_t blockcnt, 581 blk_t ref_blk, 582 int ref_offset, 583 void *priv_data), 584 void *priv_data); 585 586/* bmap.c */ 587extern errcode_t ext2fs_bmap(ext2_filsys fs, ext2_ino_t ino, 588 struct ext2_inode *inode, 589 char *block_buf, int bmap_flags, 590 blk_t block, blk_t *phys_blk); 591 592 593#if 0 594/* bmove.c */ 595extern errcode_t ext2fs_move_blocks(ext2_filsys fs, 596 ext2fs_block_bitmap reserve, 597 ext2fs_block_bitmap alloc_map, 598 int flags); 599#endif 600 601/* check_desc.c */ 602extern errcode_t ext2fs_check_desc(ext2_filsys fs); 603 604/* closefs.c */ 605extern errcode_t ext2fs_close(ext2_filsys fs); 606extern errcode_t ext2fs_flush(ext2_filsys fs); 607extern int ext2fs_bg_has_super(ext2_filsys fs, int group_block); 608extern int ext2fs_super_and_bgd_loc(ext2_filsys fs, 609 dgrp_t group, 610 blk_t *ret_super_blk, 611 blk_t *ret_old_desc_blk, 612 blk_t *ret_new_desc_blk, 613 int *ret_meta_bg); 614extern void ext2fs_update_dynamic_rev(ext2_filsys fs); 615 616/* cmp_bitmaps.c */ 617extern errcode_t ext2fs_compare_block_bitmap(ext2fs_block_bitmap bm1, 618 ext2fs_block_bitmap bm2); 619extern errcode_t ext2fs_compare_inode_bitmap(ext2fs_inode_bitmap bm1, 620 ext2fs_inode_bitmap bm2); 621 622/* dblist.c */ 623 624extern errcode_t ext2fs_get_num_dirs(ext2_filsys fs, ext2_ino_t *ret_num_dirs); 625extern errcode_t ext2fs_init_dblist(ext2_filsys fs, ext2_dblist *ret_dblist); 626extern errcode_t ext2fs_add_dir_block(ext2_dblist dblist, ext2_ino_t ino, 627 blk_t blk, int blockcnt); 628extern void ext2fs_dblist_sort(ext2_dblist dblist, 629 EXT2_QSORT_TYPE (*sortfunc)(const void *, 630 const void *)); 631extern errcode_t ext2fs_dblist_iterate(ext2_dblist dblist, 632 int (*func)(ext2_filsys fs, struct ext2_db_entry *db_info, 633 void *priv_data), 634 void *priv_data); 635extern errcode_t ext2fs_set_dir_block(ext2_dblist dblist, ext2_ino_t ino, 636 blk_t blk, int blockcnt); 637extern errcode_t ext2fs_copy_dblist(ext2_dblist src, 638 ext2_dblist *dest); 639extern int ext2fs_dblist_count(ext2_dblist dblist); 640 641/* dblist_dir.c */ 642extern errcode_t 643 ext2fs_dblist_dir_iterate(ext2_dblist dblist, 644 int flags, 645 char *block_buf, 646 int (*func)(ext2_ino_t dir, 647 int entry, 648 struct ext2_dir_entry *dirent, 649 int offset, 650 int blocksize, 651 char *buf, 652 void *priv_data), 653 void *priv_data); 654 655/* dirblock.c */ 656extern errcode_t ext2fs_read_dir_block(ext2_filsys fs, blk_t block, 657 void *buf); 658extern errcode_t ext2fs_read_dir_block2(ext2_filsys fs, blk_t block, 659 void *buf, int flags); 660extern errcode_t ext2fs_write_dir_block(ext2_filsys fs, blk_t block, 661 void *buf); 662extern errcode_t ext2fs_write_dir_block2(ext2_filsys fs, blk_t block, 663 void *buf, int flags); 664 665/* dirhash.c */ 666extern errcode_t ext2fs_dirhash(int version, const char *name, int len, 667 const __u32 *seed, 668 ext2_dirhash_t *ret_hash, 669 ext2_dirhash_t *ret_minor_hash); 670 671 672/* dir_iterate.c */ 673extern errcode_t ext2fs_dir_iterate(ext2_filsys fs, 674 ext2_ino_t dir, 675 int flags, 676 char *block_buf, 677 int (*func)(struct ext2_dir_entry *dirent, 678 int offset, 679 int blocksize, 680 char *buf, 681 void *priv_data), 682 void *priv_data); 683extern errcode_t ext2fs_dir_iterate2(ext2_filsys fs, 684 ext2_ino_t dir, 685 int flags, 686 char *block_buf, 687 int (*func)(ext2_ino_t dir, 688 int entry, 689 struct ext2_dir_entry *dirent, 690 int offset, 691 int blocksize, 692 char *buf, 693 void *priv_data), 694 void *priv_data); 695 696/* dupfs.c */ 697extern errcode_t ext2fs_dup_handle(ext2_filsys src, ext2_filsys *dest); 698 699/* expanddir.c */ 700extern errcode_t ext2fs_expand_dir(ext2_filsys fs, ext2_ino_t dir); 701 702/* ext_attr.c */ 703extern errcode_t ext2fs_read_ext_attr(ext2_filsys fs, blk_t block, void *buf); 704extern errcode_t ext2fs_write_ext_attr(ext2_filsys fs, blk_t block, 705 void *buf); 706extern errcode_t ext2fs_adjust_ea_refcount(ext2_filsys fs, blk_t blk, 707 char *block_buf, 708 int adjust, __u32 *newcount); 709 710/* fileio.c */ 711extern errcode_t ext2fs_file_open2(ext2_filsys fs, ext2_ino_t ino, 712 struct ext2_inode *inode, 713 int flags, ext2_file_t *ret); 714extern errcode_t ext2fs_file_open(ext2_filsys fs, ext2_ino_t ino, 715 int flags, ext2_file_t *ret); 716extern ext2_filsys ext2fs_file_get_fs(ext2_file_t file); 717extern errcode_t ext2fs_file_close(ext2_file_t file); 718extern errcode_t ext2fs_file_flush(ext2_file_t file); 719extern errcode_t ext2fs_file_read(ext2_file_t file, void *buf, 720 unsigned int wanted, unsigned int *got); 721extern errcode_t ext2fs_file_write(ext2_file_t file, const void *buf, 722 unsigned int nbytes, unsigned int *written); 723extern errcode_t ext2fs_file_llseek(ext2_file_t file, __u64 offset, 724 int whence, __u64 *ret_pos); 725extern errcode_t ext2fs_file_lseek(ext2_file_t file, ext2_off_t offset, 726 int whence, ext2_off_t *ret_pos); 727errcode_t ext2fs_file_get_lsize(ext2_file_t file, __u64 *ret_size); 728extern ext2_off_t ext2fs_file_get_size(ext2_file_t file); 729extern errcode_t ext2fs_file_set_size(ext2_file_t file, ext2_off_t size); 730 731/* finddev.c */ 732extern char *ext2fs_find_block_device(dev_t device); 733 734/* flushb.c */ 735extern errcode_t ext2fs_sync_device(int fd, int flushb); 736 737/* freefs.c */ 738extern void ext2fs_free(ext2_filsys fs); 739extern void ext2fs_free_generic_bitmap(ext2fs_inode_bitmap bitmap); 740extern void ext2fs_free_block_bitmap(ext2fs_block_bitmap bitmap); 741extern void ext2fs_free_inode_bitmap(ext2fs_inode_bitmap bitmap); 742extern void ext2fs_free_dblist(ext2_dblist dblist); 743extern void ext2fs_badblocks_list_free(ext2_badblocks_list bb); 744extern void ext2fs_u32_list_free(ext2_u32_list bb); 745 746/* getsize.c */ 747extern errcode_t ext2fs_get_device_size(const char *file, int blocksize, 748 blk_t *retblocks); 749 750/* getsectsize.c */ 751errcode_t ext2fs_get_device_sectsize(const char *file, int *sectsize); 752 753/* imager.c */ 754extern errcode_t ext2fs_image_inode_write(ext2_filsys fs, int fd, int flags); 755extern errcode_t ext2fs_image_inode_read(ext2_filsys fs, int fd, int flags); 756extern errcode_t ext2fs_image_super_write(ext2_filsys fs, int fd, int flags); 757extern errcode_t ext2fs_image_super_read(ext2_filsys fs, int fd, int flags); 758extern errcode_t ext2fs_image_bitmap_write(ext2_filsys fs, int fd, int flags); 759extern errcode_t ext2fs_image_bitmap_read(ext2_filsys fs, int fd, int flags); 760 761/* ind_block.c */ 762errcode_t ext2fs_read_ind_block(ext2_filsys fs, blk_t blk, void *buf); 763errcode_t ext2fs_write_ind_block(ext2_filsys fs, blk_t blk, void *buf); 764 765/* initialize.c */ 766extern errcode_t ext2fs_initialize(const char *name, int flags, 767 struct ext2_super_block *param, 768 io_manager manager, ext2_filsys *ret_fs); 769 770/* icount.c */ 771extern void ext2fs_free_icount(ext2_icount_t icount); 772extern errcode_t ext2fs_create_icount2(ext2_filsys fs, int flags, 773 unsigned int size, 774 ext2_icount_t hint, ext2_icount_t *ret); 775extern errcode_t ext2fs_create_icount(ext2_filsys fs, int flags, 776 unsigned int size, 777 ext2_icount_t *ret); 778extern errcode_t ext2fs_icount_fetch(ext2_icount_t icount, ext2_ino_t ino, 779 __u16 *ret); 780extern errcode_t ext2fs_icount_increment(ext2_icount_t icount, ext2_ino_t ino, 781 __u16 *ret); 782extern errcode_t ext2fs_icount_decrement(ext2_icount_t icount, ext2_ino_t ino, 783 __u16 *ret); 784extern errcode_t ext2fs_icount_store(ext2_icount_t icount, ext2_ino_t ino, 785 __u16 count); 786extern ext2_ino_t ext2fs_get_icount_size(ext2_icount_t icount); 787errcode_t ext2fs_icount_validate(ext2_icount_t icount, FILE *); 788 789/* inode.c */ 790extern errcode_t ext2fs_flush_icache(ext2_filsys fs); 791extern errcode_t ext2fs_get_next_inode_full(ext2_inode_scan scan, 792 ext2_ino_t *ino, 793 struct ext2_inode *inode, 794 int bufsize); 795extern errcode_t ext2fs_open_inode_scan(ext2_filsys fs, int buffer_blocks, 796 ext2_inode_scan *ret_scan); 797extern void ext2fs_close_inode_scan(ext2_inode_scan scan); 798extern errcode_t ext2fs_get_next_inode(ext2_inode_scan scan, ext2_ino_t *ino, 799 struct ext2_inode *inode); 800extern errcode_t ext2fs_inode_scan_goto_blockgroup(ext2_inode_scan scan, 801 int group); 802extern void ext2fs_set_inode_callback 803 (ext2_inode_scan scan, 804 errcode_t (*done_group)(ext2_filsys fs, 805 ext2_inode_scan scan, 806 dgrp_t group, 807 void * priv_data), 808 void *done_group_data); 809extern int ext2fs_inode_scan_flags(ext2_inode_scan scan, int set_flags, 810 int clear_flags); 811extern errcode_t ext2fs_read_inode_full(ext2_filsys fs, ext2_ino_t ino, 812 struct ext2_inode * inode, 813 int bufsize); 814extern errcode_t ext2fs_read_inode (ext2_filsys fs, ext2_ino_t ino, 815 struct ext2_inode * inode); 816extern errcode_t ext2fs_write_inode_full(ext2_filsys fs, ext2_ino_t ino, 817 struct ext2_inode * inode, 818 int bufsize); 819extern errcode_t ext2fs_write_inode(ext2_filsys fs, ext2_ino_t ino, 820 struct ext2_inode * inode); 821extern errcode_t ext2fs_write_new_inode(ext2_filsys fs, ext2_ino_t ino, 822 struct ext2_inode * inode); 823extern errcode_t ext2fs_get_blocks(ext2_filsys fs, ext2_ino_t ino, blk_t *blocks); 824extern errcode_t ext2fs_check_directory(ext2_filsys fs, ext2_ino_t ino); 825 826/* inode_io.c */ 827extern io_manager inode_io_manager; 828extern errcode_t ext2fs_inode_io_intern(ext2_filsys fs, ext2_ino_t ino, 829 char **name); 830extern errcode_t ext2fs_inode_io_intern2(ext2_filsys fs, ext2_ino_t ino, 831 struct ext2_inode *inode, 832 char **name); 833 834/* ismounted.c */ 835extern errcode_t ext2fs_check_if_mounted(const char *file, int *mount_flags); 836extern errcode_t ext2fs_check_mount_point(const char *device, int *mount_flags, 837 char *mtpt, int mtlen); 838 839/* namei.c */ 840extern errcode_t ext2fs_lookup(ext2_filsys fs, ext2_ino_t dir, const char *name, 841 int namelen, char *buf, ext2_ino_t *inode); 842extern errcode_t ext2fs_namei(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd, 843 const char *name, ext2_ino_t *inode); 844errcode_t ext2fs_namei_follow(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd, 845 const char *name, ext2_ino_t *inode); 846extern errcode_t ext2fs_follow_link(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd, 847 ext2_ino_t inode, ext2_ino_t *res_inode); 848 849/* native.c */ 850int ext2fs_native_flag(void); 851 852/* newdir.c */ 853extern errcode_t ext2fs_new_dir_block(ext2_filsys fs, ext2_ino_t dir_ino, 854 ext2_ino_t parent_ino, char **block); 855 856/* mkdir.c */ 857extern errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum, 858 const char *name); 859 860/* mkjournal.c */ 861extern errcode_t ext2fs_create_journal_superblock(ext2_filsys fs, 862 __u32 size, int flags, 863 char **ret_jsb); 864extern errcode_t ext2fs_add_journal_device(ext2_filsys fs, 865 ext2_filsys journal_dev); 866extern errcode_t ext2fs_add_journal_inode(ext2_filsys fs, blk_t size, 867 int flags); 868 869/* openfs.c */ 870extern errcode_t ext2fs_open(const char *name, int flags, int superblock, 871 unsigned int block_size, io_manager manager, 872 ext2_filsys *ret_fs); 873extern errcode_t ext2fs_open2(const char *name, const char *io_options, 874 int flags, int superblock, 875 unsigned int block_size, io_manager manager, 876 ext2_filsys *ret_fs); 877extern blk_t ext2fs_descriptor_block_loc(ext2_filsys fs, blk_t group_block, 878 dgrp_t i); 879errcode_t ext2fs_get_data_io(ext2_filsys fs, io_channel *old_io); 880errcode_t ext2fs_set_data_io(ext2_filsys fs, io_channel new_io); 881errcode_t ext2fs_rewrite_to_io(ext2_filsys fs, io_channel new_io); 882 883/* get_pathname.c */ 884extern errcode_t ext2fs_get_pathname(ext2_filsys fs, ext2_ino_t dir, ext2_ino_t ino, 885 char **name); 886 887/* link.c */ 888errcode_t ext2fs_link(ext2_filsys fs, ext2_ino_t dir, const char *name, 889 ext2_ino_t ino, int flags); 890errcode_t ext2fs_unlink(ext2_filsys fs, ext2_ino_t dir, const char *name, 891 ext2_ino_t ino, int flags); 892 893/* read_bb.c */ 894extern errcode_t ext2fs_read_bb_inode(ext2_filsys fs, 895 ext2_badblocks_list *bb_list); 896 897/* read_bb_file.c */ 898extern errcode_t ext2fs_read_bb_FILE2(ext2_filsys fs, FILE *f, 899 ext2_badblocks_list *bb_list, 900 void *priv_data, 901 void (*invalid)(ext2_filsys fs, 902 blk_t blk, 903 char *badstr, 904 void *priv_data)); 905extern errcode_t ext2fs_read_bb_FILE(ext2_filsys fs, FILE *f, 906 ext2_badblocks_list *bb_list, 907 void (*invalid)(ext2_filsys fs, 908 blk_t blk)); 909 910/* res_gdt.c */ 911extern errcode_t ext2fs_create_resize_inode(ext2_filsys fs); 912 913/* rs_bitmap.c */ 914extern errcode_t ext2fs_resize_generic_bitmap(__u32 new_end, 915 __u32 new_real_end, 916 ext2fs_generic_bitmap bmap); 917extern errcode_t ext2fs_resize_inode_bitmap(__u32 new_end, __u32 new_real_end, 918 ext2fs_inode_bitmap bmap); 919extern errcode_t ext2fs_resize_block_bitmap(__u32 new_end, __u32 new_real_end, 920 ext2fs_block_bitmap bmap); 921extern errcode_t ext2fs_copy_bitmap(ext2fs_generic_bitmap src, 922 ext2fs_generic_bitmap *dest); 923 924/* swapfs.c */ 925extern void ext2fs_swap_ext_attr(char *to, char *from, int bufsize, 926 int has_header); 927extern void ext2fs_swap_super(struct ext2_super_block * super); 928extern void ext2fs_swap_group_desc(struct ext2_group_desc *gdp); 929extern void ext2fs_swap_inode_full(ext2_filsys fs, struct ext2_inode_large *t, 930 struct ext2_inode_large *f, int hostorder, 931 int bufsize); 932extern void ext2fs_swap_inode(ext2_filsys fs,struct ext2_inode *t, 933 struct ext2_inode *f, int hostorder); 934 935/* valid_blk.c */ 936extern int ext2fs_inode_has_valid_blocks(struct ext2_inode *inode); 937 938/* version.c */ 939extern int ext2fs_parse_version_string(const char *ver_string); 940extern int ext2fs_get_library_version(const char **ver_string, 941 const char **date_string); 942 943/* write_bb_file.c */ 944extern errcode_t ext2fs_write_bb_FILE(ext2_badblocks_list bb_list, 945 unsigned int flags, 946 FILE *f); 947 948 949/* inline functions */ 950extern errcode_t ext2fs_get_mem(unsigned long size, void *ptr); 951extern errcode_t ext2fs_free_mem(void *ptr); 952extern errcode_t ext2fs_resize_mem(unsigned long old_size, 953 unsigned long size, void *ptr); 954extern void ext2fs_mark_super_dirty(ext2_filsys fs); 955extern void ext2fs_mark_changed(ext2_filsys fs); 956extern int ext2fs_test_changed(ext2_filsys fs); 957extern void ext2fs_mark_valid(ext2_filsys fs); 958extern void ext2fs_unmark_valid(ext2_filsys fs); 959extern int ext2fs_test_valid(ext2_filsys fs); 960extern void ext2fs_mark_ib_dirty(ext2_filsys fs); 961extern void ext2fs_mark_bb_dirty(ext2_filsys fs); 962extern int ext2fs_test_ib_dirty(ext2_filsys fs); 963extern int ext2fs_test_bb_dirty(ext2_filsys fs); 964extern int ext2fs_group_of_blk(ext2_filsys fs, blk_t blk); 965extern int ext2fs_group_of_ino(ext2_filsys fs, ext2_ino_t ino); 966extern blk_t ext2fs_group_first_block(ext2_filsys fs, dgrp_t group); 967extern blk_t ext2fs_group_last_block(ext2_filsys fs, dgrp_t group); 968extern blk_t ext2fs_inode_data_blocks(ext2_filsys fs, 969 struct ext2_inode *inode); 970extern unsigned int ext2fs_div_ceil(unsigned int a, unsigned int b); 971 972/* 973 * The actual inlined functions definitions themselves... 974 * 975 * If NO_INLINE_FUNCS is defined, then we won't try to do inline 976 * functions at all! 977 */ 978#if (defined(INCLUDE_INLINE_FUNCS) || !defined(NO_INLINE_FUNCS)) 979#ifdef INCLUDE_INLINE_FUNCS 980#define _INLINE_ extern 981#else 982#ifdef __GNUC__ 983#define _INLINE_ extern __inline__ 984#else /* For Watcom C */ 985#define _INLINE_ extern inline 986#endif 987#endif 988 989#ifndef EXT2_CUSTOM_MEMORY_ROUTINES 990#include <string.h> 991/* 992 * Allocate memory 993 */ 994_INLINE_ errcode_t ext2fs_get_mem(unsigned long size, void *ptr) 995{ 996 void **pp = (void **)ptr; 997 998 *pp = malloc(size); 999 if (!*pp) 1000 return EXT2_ET_NO_MEMORY; 1001 return 0; 1002} 1003 1004/* 1005 * Free memory 1006 */ 1007_INLINE_ errcode_t ext2fs_free_mem(void *ptr) 1008{ 1009 void **pp = (void **)ptr; 1010 1011 free(*pp); 1012 *pp = 0; 1013 return 0; 1014} 1015 1016/* 1017 * Resize memory 1018 */ 1019_INLINE_ errcode_t ext2fs_resize_mem(unsigned long EXT2FS_ATTR((unused)) old_size, 1020 unsigned long size, void *ptr) 1021{ 1022 void *p; 1023 1024 /* Use "memcpy" for pointer assignments here to avoid problems 1025 * with C99 strict type aliasing rules. */ 1026 memcpy(&p, ptr, sizeof (p)); 1027 p = realloc(p, size); 1028 if (!p) 1029 return EXT2_ET_NO_MEMORY; 1030 memcpy(ptr, &p, sizeof (p)); 1031 return 0; 1032} 1033#endif /* Custom memory routines */ 1034 1035/* 1036 * Mark a filesystem superblock as dirty 1037 */ 1038_INLINE_ void ext2fs_mark_super_dirty(ext2_filsys fs) 1039{ 1040 fs->flags |= EXT2_FLAG_DIRTY | EXT2_FLAG_CHANGED; 1041} 1042 1043/* 1044 * Mark a filesystem as changed 1045 */ 1046_INLINE_ void ext2fs_mark_changed(ext2_filsys fs) 1047{ 1048 fs->flags |= EXT2_FLAG_CHANGED; 1049} 1050 1051/* 1052 * Check to see if a filesystem has changed 1053 */ 1054_INLINE_ int ext2fs_test_changed(ext2_filsys fs) 1055{ 1056 return (fs->flags & EXT2_FLAG_CHANGED); 1057} 1058 1059/* 1060 * Mark a filesystem as valid 1061 */ 1062_INLINE_ void ext2fs_mark_valid(ext2_filsys fs) 1063{ 1064 fs->flags |= EXT2_FLAG_VALID; 1065} 1066 1067/* 1068 * Mark a filesystem as NOT valid 1069 */ 1070_INLINE_ void ext2fs_unmark_valid(ext2_filsys fs) 1071{ 1072 fs->flags &= ~EXT2_FLAG_VALID; 1073} 1074 1075/* 1076 * Check to see if a filesystem is valid 1077 */ 1078_INLINE_ int ext2fs_test_valid(ext2_filsys fs) 1079{ 1080 return (fs->flags & EXT2_FLAG_VALID); 1081} 1082 1083/* 1084 * Mark the inode bitmap as dirty 1085 */ 1086_INLINE_ void ext2fs_mark_ib_dirty(ext2_filsys fs) 1087{ 1088 fs->flags |= EXT2_FLAG_IB_DIRTY | EXT2_FLAG_CHANGED; 1089} 1090 1091/* 1092 * Mark the block bitmap as dirty 1093 */ 1094_INLINE_ void ext2fs_mark_bb_dirty(ext2_filsys fs) 1095{ 1096 fs->flags |= EXT2_FLAG_BB_DIRTY | EXT2_FLAG_CHANGED; 1097} 1098 1099/* 1100 * Check to see if a filesystem's inode bitmap is dirty 1101 */ 1102_INLINE_ int ext2fs_test_ib_dirty(ext2_filsys fs) 1103{ 1104 return (fs->flags & EXT2_FLAG_IB_DIRTY); 1105} 1106 1107/* 1108 * Check to see if a filesystem's block bitmap is dirty 1109 */ 1110_INLINE_ int ext2fs_test_bb_dirty(ext2_filsys fs) 1111{ 1112 return (fs->flags & EXT2_FLAG_BB_DIRTY); 1113} 1114 1115/* 1116 * Return the group # of a block 1117 */ 1118_INLINE_ int ext2fs_group_of_blk(ext2_filsys fs, blk_t blk) 1119{ 1120 return (blk - fs->super->s_first_data_block) / 1121 fs->super->s_blocks_per_group; 1122} 1123 1124/* 1125 * Return the group # of an inode number 1126 */ 1127_INLINE_ int ext2fs_group_of_ino(ext2_filsys fs, ext2_ino_t ino) 1128{ 1129 return (ino - 1) / fs->super->s_inodes_per_group; 1130} 1131 1132/* 1133 * Return the first block (inclusive) in a group 1134 */ 1135_INLINE_ blk_t ext2fs_group_first_block(ext2_filsys fs, dgrp_t group) 1136{ 1137 return fs->super->s_first_data_block + 1138 (group * fs->super->s_blocks_per_group); 1139} 1140 1141/* 1142 * Return the last block (inclusive) in a group 1143 */ 1144_INLINE_ blk_t ext2fs_group_last_block(ext2_filsys fs, dgrp_t group) 1145{ 1146 return (group == fs->group_desc_count - 1 ? 1147 fs->super->s_blocks_count - 1 : 1148 ext2fs_group_first_block(fs, group) + 1149 (fs->super->s_blocks_per_group - 1)); 1150} 1151 1152_INLINE_ blk_t ext2fs_inode_data_blocks(ext2_filsys fs, 1153 struct ext2_inode *inode) 1154{ 1155 return inode->i_blocks - 1156 (inode->i_file_acl ? fs->blocksize >> 9 : 0); 1157} 1158 1159/* 1160 * This is an efficient, overflow safe way of calculating ceil((1.0 * a) / b) 1161 */ 1162_INLINE_ unsigned int ext2fs_div_ceil(unsigned int a, unsigned int b) 1163{ 1164 if (!a) 1165 return 0; 1166 return ((a - 1) / b) + 1; 1167} 1168#undef _INLINE_ 1169#endif 1170 1171#ifdef __cplusplus 1172} 1173#endif 1174 1175#endif /* _EXT2FS_EXT2FS_H */ 1176