ext2fs.h revision 52b1dd5e496c199e9cbcc238f26fd2264a07a2cf
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#include "ext3_extents.h" 69#else 70#include <ext2fs/ext2_types.h> 71#include <ext2fs/ext2_fs.h> 72#include <ext2fs/ext3_extents.h> 73#endif /* EXT2_FLAT_INCLUDES */ 74 75typedef __u32 ext2_ino_t; 76typedef __u32 blk_t; 77typedef __u32 dgrp_t; 78typedef __u32 ext2_off_t; 79typedef __s64 e2_blkcnt_t; 80typedef __u32 ext2_dirhash_t; 81 82#if EXT2_FLAT_INCLUDES 83#include "com_err.h" 84#include "ext2_io.h" 85#include "ext2_err.h" 86#else 87#include <et/com_err.h> 88#include <ext2fs/ext2_io.h> 89#include <ext2fs/ext2_err.h> 90#endif 91 92/* 93 * Portability help for Microsoft Visual C++ 94 */ 95#ifdef _MSC_VER 96#define EXT2_QSORT_TYPE int __cdecl 97#else 98#define EXT2_QSORT_TYPE int 99#endif 100 101typedef struct struct_ext2_filsys *ext2_filsys; 102 103struct ext2fs_struct_generic_bitmap { 104 errcode_t magic; 105 ext2_filsys fs; 106 __u32 start, end; 107 __u32 real_end; 108 char * description; 109 char * bitmap; 110 errcode_t base_error_code; 111 __u32 reserved[7]; 112}; 113 114#define EXT2FS_MARK_ERROR 0 115#define EXT2FS_UNMARK_ERROR 1 116#define EXT2FS_TEST_ERROR 2 117 118typedef struct ext2fs_struct_generic_bitmap *ext2fs_generic_bitmap; 119typedef struct ext2fs_struct_generic_bitmap *ext2fs_inode_bitmap; 120typedef struct ext2fs_struct_generic_bitmap *ext2fs_block_bitmap; 121 122#define EXT2_FIRST_INODE(s) EXT2_FIRST_INO(s) 123 124 125/* 126 * Badblocks list definitions 127 */ 128 129typedef struct ext2_struct_u32_list *ext2_badblocks_list; 130typedef struct ext2_struct_u32_iterate *ext2_badblocks_iterate; 131 132typedef struct ext2_struct_u32_list *ext2_u32_list; 133typedef struct ext2_struct_u32_iterate *ext2_u32_iterate; 134 135/* old */ 136typedef struct ext2_struct_u32_list *badblocks_list; 137typedef struct ext2_struct_u32_iterate *badblocks_iterate; 138 139#define BADBLOCKS_FLAG_DIRTY 1 140 141/* 142 * ext2_dblist structure and abstractions (see dblist.c) 143 */ 144struct ext2_db_entry { 145 ext2_ino_t ino; 146 blk_t blk; 147 int blockcnt; 148}; 149 150typedef struct ext2_struct_dblist *ext2_dblist; 151 152#define DBLIST_ABORT 1 153 154/* 155 * ext2_fileio definitions 156 */ 157 158#define EXT2_FILE_WRITE 0x0001 159#define EXT2_FILE_CREATE 0x0002 160 161#define EXT2_FILE_MASK 0x00FF 162 163#define EXT2_FILE_BUF_DIRTY 0x4000 164#define EXT2_FILE_BUF_VALID 0x2000 165 166typedef struct ext2_file *ext2_file_t; 167 168#define EXT2_SEEK_SET 0 169#define EXT2_SEEK_CUR 1 170#define EXT2_SEEK_END 2 171 172/* 173 * Flags for the ext2_filsys structure and for ext2fs_open() 174 */ 175#define EXT2_FLAG_RW 0x01 176#define EXT2_FLAG_CHANGED 0x02 177#define EXT2_FLAG_DIRTY 0x04 178#define EXT2_FLAG_VALID 0x08 179#define EXT2_FLAG_IB_DIRTY 0x10 180#define EXT2_FLAG_BB_DIRTY 0x20 181#define EXT2_FLAG_SWAP_BYTES 0x40 182#define EXT2_FLAG_SWAP_BYTES_READ 0x80 183#define EXT2_FLAG_SWAP_BYTES_WRITE 0x100 184#define EXT2_FLAG_MASTER_SB_ONLY 0x200 185#define EXT2_FLAG_FORCE 0x400 186#define EXT2_FLAG_SUPER_ONLY 0x800 187#define EXT2_FLAG_JOURNAL_DEV_OK 0x1000 188#define EXT2_FLAG_IMAGE_FILE 0x2000 189#define EXT2_FLAG_EXCLUSIVE 0x4000 190#define EXT2_FLAG_SOFTSUPP_FEATURES 0x8000 191#define EXT2_FLAG_NOFREE_ON_ERROR 0x10000 192 193/* 194 * Special flag in the ext2 inode i_flag field that means that this is 195 * a new inode. (So that ext2_write_inode() can clear extra fields.) 196 */ 197#define EXT2_NEW_INODE_FL 0x80000000 198 199/* 200 * Flags for mkjournal 201 * 202 * EXT2_MKJOURNAL_V1_SUPER Make a (deprecated) V1 journal superblock 203 */ 204#define EXT2_MKJOURNAL_V1_SUPER 0x0000001 205 206struct struct_ext2_filsys { 207 errcode_t magic; 208 io_channel io; 209 int flags; 210 char * device_name; 211 struct ext2_super_block * super; 212 unsigned int blocksize; 213 int fragsize; 214 dgrp_t group_desc_count; 215 unsigned long desc_blocks; 216 struct ext2_group_desc * group_desc; 217 int inode_blocks_per_group; 218 ext2fs_inode_bitmap inode_map; 219 ext2fs_block_bitmap block_map; 220 errcode_t (*get_blocks)(ext2_filsys fs, ext2_ino_t ino, blk_t *blocks); 221 errcode_t (*check_directory)(ext2_filsys fs, ext2_ino_t ino); 222 errcode_t (*write_bitmaps)(ext2_filsys fs); 223 errcode_t (*read_inode)(ext2_filsys fs, ext2_ino_t ino, 224 struct ext2_inode *inode); 225 errcode_t (*write_inode)(ext2_filsys fs, ext2_ino_t ino, 226 struct ext2_inode *inode); 227 ext2_badblocks_list badblocks; 228 ext2_dblist dblist; 229 __u32 stride; /* for mke2fs */ 230 struct ext2_super_block * orig_super; 231 struct ext2_image_hdr * image_header; 232 __u32 umask; 233 time_t now; 234 /* 235 * Reserved for future expansion 236 */ 237 __u32 reserved[7]; 238 239 /* 240 * Reserved for the use of the calling application. 241 */ 242 void * priv_data; 243 244 /* 245 * Inode cache 246 */ 247 struct ext2_inode_cache *icache; 248 io_channel image_io; 249}; 250 251#if EXT2_FLAT_INCLUDES 252#include "e2_bitops.h" 253#else 254#include <ext2fs/bitops.h> 255#endif 256 257/* 258 * Return flags for the block iterator functions 259 */ 260#define BLOCK_CHANGED 1 261#define BLOCK_ABORT 2 262#define BLOCK_ERROR 4 263 264/* 265 * Block interate flags 266 * 267 * BLOCK_FLAG_APPEND, or BLOCK_FLAG_HOLE, indicates that the interator 268 * function should be called on blocks where the block number is zero. 269 * This is used by ext2fs_expand_dir() to be able to add a new block 270 * to an inode. It can also be used for programs that want to be able 271 * to deal with files that contain "holes". 272 * 273 * BLOCK_FLAG_DEPTH_TRAVERSE indicates that the iterator function for 274 * the indirect, doubly indirect, etc. blocks should be called after 275 * all of the blocks containined in the indirect blocks are processed. 276 * This is useful if you are going to be deallocating blocks from an 277 * inode. 278 * 279 * BLOCK_FLAG_DATA_ONLY indicates that the iterator function should be 280 * called for data blocks only. 281 * 282 * BLOCK_FLAG_NO_LARGE is for internal use only. It informs 283 * ext2fs_block_iterate2 that large files won't be accepted. 284 */ 285#define BLOCK_FLAG_APPEND 1 286#define BLOCK_FLAG_HOLE 1 287#define BLOCK_FLAG_DEPTH_TRAVERSE 2 288#define BLOCK_FLAG_DATA_ONLY 4 289 290#define BLOCK_FLAG_NO_LARGE 0x1000 291 292/* 293 * Magic "block count" return values for the block iterator function. 294 */ 295#define BLOCK_COUNT_IND (-1) 296#define BLOCK_COUNT_DIND (-2) 297#define BLOCK_COUNT_TIND (-3) 298#define BLOCK_COUNT_TRANSLATOR (-4) 299 300#if 0 301/* 302 * Flags for ext2fs_move_blocks 303 */ 304#define EXT2_BMOVE_GET_DBLIST 0x0001 305#define EXT2_BMOVE_DEBUG 0x0002 306#endif 307 308/* 309 * Flags for directory block reading and writing functions 310 */ 311#define EXT2_DIRBLOCK_V2_STRUCT 0x0001 312 313/* 314 * Return flags for the directory iterator functions 315 */ 316#define DIRENT_CHANGED 1 317#define DIRENT_ABORT 2 318#define DIRENT_ERROR 3 319 320/* 321 * Directory iterator flags 322 */ 323 324#define DIRENT_FLAG_INCLUDE_EMPTY 1 325#define DIRENT_FLAG_INCLUDE_REMOVED 2 326 327#define DIRENT_DOT_FILE 1 328#define DIRENT_DOT_DOT_FILE 2 329#define DIRENT_OTHER_FILE 3 330#define DIRENT_DELETED_FILE 4 331 332/* 333 * Inode scan definitions 334 */ 335typedef struct ext2_struct_inode_scan *ext2_inode_scan; 336 337/* 338 * ext2fs_scan flags 339 */ 340#define EXT2_SF_CHK_BADBLOCKS 0x0001 341#define EXT2_SF_BAD_INODE_BLK 0x0002 342#define EXT2_SF_BAD_EXTRA_BYTES 0x0004 343#define EXT2_SF_SKIP_MISSING_ITABLE 0x0008 344#define EXT2_SF_DO_LAZY 0x0010 345 346/* 347 * ext2fs_check_if_mounted flags 348 */ 349#define EXT2_MF_MOUNTED 1 350#define EXT2_MF_ISROOT 2 351#define EXT2_MF_READONLY 4 352#define EXT2_MF_SWAP 8 353#define EXT2_MF_BUSY 16 354 355/* 356 * Ext2/linux mode flags. We define them here so that we don't need 357 * to depend on the OS's sys/stat.h, since we may be compiling on a 358 * non-Linux system. 359 */ 360#define LINUX_S_IFMT 00170000 361#define LINUX_S_IFSOCK 0140000 362#define LINUX_S_IFLNK 0120000 363#define LINUX_S_IFREG 0100000 364#define LINUX_S_IFBLK 0060000 365#define LINUX_S_IFDIR 0040000 366#define LINUX_S_IFCHR 0020000 367#define LINUX_S_IFIFO 0010000 368#define LINUX_S_ISUID 0004000 369#define LINUX_S_ISGID 0002000 370#define LINUX_S_ISVTX 0001000 371 372#define LINUX_S_IRWXU 00700 373#define LINUX_S_IRUSR 00400 374#define LINUX_S_IWUSR 00200 375#define LINUX_S_IXUSR 00100 376 377#define LINUX_S_IRWXG 00070 378#define LINUX_S_IRGRP 00040 379#define LINUX_S_IWGRP 00020 380#define LINUX_S_IXGRP 00010 381 382#define LINUX_S_IRWXO 00007 383#define LINUX_S_IROTH 00004 384#define LINUX_S_IWOTH 00002 385#define LINUX_S_IXOTH 00001 386 387#define LINUX_S_ISLNK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFLNK) 388#define LINUX_S_ISREG(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFREG) 389#define LINUX_S_ISDIR(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFDIR) 390#define LINUX_S_ISCHR(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFCHR) 391#define LINUX_S_ISBLK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFBLK) 392#define LINUX_S_ISFIFO(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFIFO) 393#define LINUX_S_ISSOCK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFSOCK) 394 395/* 396 * ext2 size of an inode 397 */ 398#define EXT2_I_SIZE(i) ((i)->i_size | ((__u64) (i)->i_size_high << 32)) 399 400/* 401 * ext2_icount_t abstraction 402 */ 403#define EXT2_ICOUNT_OPT_INCREMENT 0x01 404 405typedef struct ext2_icount *ext2_icount_t; 406 407/* 408 * Flags for ext2fs_bmap 409 */ 410#define BMAP_ALLOC 0x0001 411#define BMAP_SET 0x0002 412 413/* 414 * Flags for imager.c functions 415 */ 416#define IMAGER_FLAG_INODEMAP 1 417#define IMAGER_FLAG_SPARSEWRITE 2 418 419/* 420 * For checking structure magic numbers... 421 */ 422 423#define EXT2_CHECK_MAGIC(struct, code) \ 424 if ((struct)->magic != (code)) return (code) 425 426 427/* 428 * For ext2 compression support 429 */ 430#define EXT2FS_COMPRESSED_BLKADDR ((blk_t) 0xffffffff) 431#define HOLE_BLKADDR(_b) ((_b) == 0 || (_b) == EXT2FS_COMPRESSED_BLKADDR) 432 433/* 434 * Features supported by this version of the library 435 */ 436#define EXT2_LIB_FEATURE_COMPAT_SUPP (EXT2_FEATURE_COMPAT_DIR_PREALLOC|\ 437 EXT2_FEATURE_COMPAT_IMAGIC_INODES|\ 438 EXT3_FEATURE_COMPAT_HAS_JOURNAL|\ 439 EXT2_FEATURE_COMPAT_RESIZE_INODE|\ 440 EXT2_FEATURE_COMPAT_DIR_INDEX|\ 441 EXT2_FEATURE_COMPAT_LAZY_BG|\ 442 EXT2_FEATURE_COMPAT_EXT_ATTR) 443 444/* This #ifdef is temporary until compression is fully supported */ 445#ifdef ENABLE_COMPRESSION 446#ifndef I_KNOW_THAT_COMPRESSION_IS_EXPERIMENTAL 447/* If the below warning bugs you, then have 448 `CPPFLAGS=-DI_KNOW_THAT_COMPRESSION_IS_EXPERIMENTAL' in your 449 environment at configure time. */ 450 #warning "Compression support is experimental" 451#endif 452#define EXT2_LIB_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE|\ 453 EXT2_FEATURE_INCOMPAT_COMPRESSION|\ 454 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV|\ 455 EXT2_FEATURE_INCOMPAT_META_BG|\ 456 EXT3_FEATURE_INCOMPAT_RECOVER) 457#else 458#define EXT2_LIB_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE|\ 459 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV|\ 460 EXT2_FEATURE_INCOMPAT_META_BG|\ 461 EXT3_FEATURE_INCOMPAT_RECOVER) 462#endif 463#define EXT2_LIB_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER|\ 464 EXT2_FEATURE_RO_COMPAT_LARGE_FILE) 465 466/* 467 * These features are only allowed if EXT2_FLAG_SOFTSUPP_FEATURES is passed 468 * to ext2fs_openfs() 469 */ 470#define EXT2_LIB_SOFTSUPP_INCOMPAT (EXT3_FEATURE_INCOMPAT_EXTENTS) 471#define EXT2_LIB_SOFTSUPP_RO_COMPAT (EXT4_FEATURE_RO_COMPAT_HUGE_FILE|\ 472 EXT4_FEATURE_RO_COMPAT_GDT_CSUM|\ 473 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|\ 474 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE) 475 476/* 477 * function prototypes 478 */ 479 480/* alloc.c */ 481extern errcode_t ext2fs_new_inode(ext2_filsys fs, ext2_ino_t dir, int mode, 482 ext2fs_inode_bitmap map, ext2_ino_t *ret); 483extern errcode_t ext2fs_new_block(ext2_filsys fs, blk_t goal, 484 ext2fs_block_bitmap map, blk_t *ret); 485extern errcode_t ext2fs_get_free_blocks(ext2_filsys fs, blk_t start, 486 blk_t finish, int num, 487 ext2fs_block_bitmap map, 488 blk_t *ret); 489extern errcode_t ext2fs_alloc_block(ext2_filsys fs, blk_t goal, 490 char *block_buf, blk_t *ret); 491 492/* alloc_sb.c */ 493extern int ext2fs_reserve_super_and_bgd(ext2_filsys fs, 494 dgrp_t group, 495 ext2fs_block_bitmap bmap); 496 497/* alloc_stats.c */ 498void ext2fs_inode_alloc_stats(ext2_filsys fs, ext2_ino_t ino, int inuse); 499void ext2fs_inode_alloc_stats2(ext2_filsys fs, ext2_ino_t ino, 500 int inuse, int isdir); 501void ext2fs_block_alloc_stats(ext2_filsys fs, blk_t blk, int inuse); 502 503/* alloc_tables.c */ 504extern errcode_t ext2fs_allocate_tables(ext2_filsys fs); 505extern errcode_t ext2fs_allocate_group_table(ext2_filsys fs, dgrp_t group, 506 ext2fs_block_bitmap bmap); 507 508/* badblocks.c */ 509extern errcode_t ext2fs_u32_list_create(ext2_u32_list *ret, int size); 510extern errcode_t ext2fs_u32_list_add(ext2_u32_list bb, __u32 blk); 511extern int ext2fs_u32_list_find(ext2_u32_list bb, __u32 blk); 512extern int ext2fs_u32_list_test(ext2_u32_list bb, blk_t blk); 513extern errcode_t ext2fs_u32_list_iterate_begin(ext2_u32_list bb, 514 ext2_u32_iterate *ret); 515extern int ext2fs_u32_list_iterate(ext2_u32_iterate iter, blk_t *blk); 516extern void ext2fs_u32_list_iterate_end(ext2_u32_iterate iter); 517extern errcode_t ext2fs_u32_copy(ext2_u32_list src, ext2_u32_list *dest); 518extern int ext2fs_u32_list_equal(ext2_u32_list bb1, ext2_u32_list bb2); 519 520extern errcode_t ext2fs_badblocks_list_create(ext2_badblocks_list *ret, 521 int size); 522extern errcode_t ext2fs_badblocks_list_add(ext2_badblocks_list bb, 523 blk_t blk); 524extern int ext2fs_badblocks_list_test(ext2_badblocks_list bb, 525 blk_t blk); 526extern int ext2fs_u32_list_del(ext2_u32_list bb, __u32 blk); 527extern void ext2fs_badblocks_list_del(ext2_u32_list bb, __u32 blk); 528extern errcode_t 529 ext2fs_badblocks_list_iterate_begin(ext2_badblocks_list bb, 530 ext2_badblocks_iterate *ret); 531extern int ext2fs_badblocks_list_iterate(ext2_badblocks_iterate iter, 532 blk_t *blk); 533extern void ext2fs_badblocks_list_iterate_end(ext2_badblocks_iterate iter); 534extern errcode_t ext2fs_badblocks_copy(ext2_badblocks_list src, 535 ext2_badblocks_list *dest); 536extern int ext2fs_badblocks_equal(ext2_badblocks_list bb1, 537 ext2_badblocks_list bb2); 538extern int ext2fs_u32_list_count(ext2_u32_list bb); 539 540/* bb_compat */ 541extern errcode_t badblocks_list_create(badblocks_list *ret, int size); 542extern errcode_t badblocks_list_add(badblocks_list bb, blk_t blk); 543extern int badblocks_list_test(badblocks_list bb, blk_t blk); 544extern errcode_t badblocks_list_iterate_begin(badblocks_list bb, 545 badblocks_iterate *ret); 546extern int badblocks_list_iterate(badblocks_iterate iter, blk_t *blk); 547extern void badblocks_list_iterate_end(badblocks_iterate iter); 548extern void badblocks_list_free(badblocks_list bb); 549 550/* bb_inode.c */ 551extern errcode_t ext2fs_update_bb_inode(ext2_filsys fs, 552 ext2_badblocks_list bb_list); 553 554/* bitmaps.c */ 555extern errcode_t ext2fs_write_inode_bitmap(ext2_filsys fs); 556extern errcode_t ext2fs_write_block_bitmap (ext2_filsys fs); 557extern errcode_t ext2fs_read_inode_bitmap (ext2_filsys fs); 558extern errcode_t ext2fs_read_block_bitmap(ext2_filsys fs); 559extern errcode_t ext2fs_allocate_generic_bitmap(__u32 start, 560 __u32 end, 561 __u32 real_end, 562 const char *descr, 563 ext2fs_generic_bitmap *ret); 564extern errcode_t ext2fs_allocate_block_bitmap(ext2_filsys fs, 565 const char *descr, 566 ext2fs_block_bitmap *ret); 567extern errcode_t ext2fs_allocate_inode_bitmap(ext2_filsys fs, 568 const char *descr, 569 ext2fs_inode_bitmap *ret); 570extern errcode_t ext2fs_fudge_inode_bitmap_end(ext2fs_inode_bitmap bitmap, 571 ext2_ino_t end, ext2_ino_t *oend); 572extern errcode_t ext2fs_fudge_block_bitmap_end(ext2fs_block_bitmap bitmap, 573 blk_t end, blk_t *oend); 574extern void ext2fs_clear_inode_bitmap(ext2fs_inode_bitmap bitmap); 575extern void ext2fs_clear_block_bitmap(ext2fs_block_bitmap bitmap); 576extern errcode_t ext2fs_read_bitmaps(ext2_filsys fs); 577extern errcode_t ext2fs_write_bitmaps(ext2_filsys fs); 578 579/* block.c */ 580extern errcode_t ext2fs_block_iterate(ext2_filsys fs, 581 ext2_ino_t ino, 582 int flags, 583 char *block_buf, 584 int (*func)(ext2_filsys fs, 585 blk_t *blocknr, 586 int blockcnt, 587 void *priv_data), 588 void *priv_data); 589errcode_t ext2fs_block_iterate2(ext2_filsys fs, 590 ext2_ino_t ino, 591 int flags, 592 char *block_buf, 593 int (*func)(ext2_filsys fs, 594 blk_t *blocknr, 595 e2_blkcnt_t blockcnt, 596 blk_t ref_blk, 597 int ref_offset, 598 void *priv_data), 599 void *priv_data); 600 601/* bmap.c */ 602extern errcode_t ext2fs_bmap(ext2_filsys fs, ext2_ino_t ino, 603 struct ext2_inode *inode, 604 char *block_buf, int bmap_flags, 605 blk_t block, blk_t *phys_blk); 606 607 608#if 0 609/* bmove.c */ 610extern errcode_t ext2fs_move_blocks(ext2_filsys fs, 611 ext2fs_block_bitmap reserve, 612 ext2fs_block_bitmap alloc_map, 613 int flags); 614#endif 615 616/* check_desc.c */ 617extern errcode_t ext2fs_check_desc(ext2_filsys fs); 618 619/* closefs.c */ 620extern errcode_t ext2fs_close(ext2_filsys fs); 621extern errcode_t ext2fs_flush(ext2_filsys fs); 622extern int ext2fs_bg_has_super(ext2_filsys fs, int group_block); 623extern int ext2fs_super_and_bgd_loc(ext2_filsys fs, 624 dgrp_t group, 625 blk_t *ret_super_blk, 626 blk_t *ret_old_desc_blk, 627 blk_t *ret_new_desc_blk, 628 int *ret_meta_bg); 629extern void ext2fs_update_dynamic_rev(ext2_filsys fs); 630 631/* cmp_bitmaps.c */ 632extern errcode_t ext2fs_compare_block_bitmap(ext2fs_block_bitmap bm1, 633 ext2fs_block_bitmap bm2); 634extern errcode_t ext2fs_compare_inode_bitmap(ext2fs_inode_bitmap bm1, 635 ext2fs_inode_bitmap bm2); 636 637/* dblist.c */ 638 639extern errcode_t ext2fs_get_num_dirs(ext2_filsys fs, ext2_ino_t *ret_num_dirs); 640extern errcode_t ext2fs_init_dblist(ext2_filsys fs, ext2_dblist *ret_dblist); 641extern errcode_t ext2fs_add_dir_block(ext2_dblist dblist, ext2_ino_t ino, 642 blk_t blk, int blockcnt); 643extern void ext2fs_dblist_sort(ext2_dblist dblist, 644 EXT2_QSORT_TYPE (*sortfunc)(const void *, 645 const void *)); 646extern errcode_t ext2fs_dblist_iterate(ext2_dblist dblist, 647 int (*func)(ext2_filsys fs, struct ext2_db_entry *db_info, 648 void *priv_data), 649 void *priv_data); 650extern errcode_t ext2fs_set_dir_block(ext2_dblist dblist, ext2_ino_t ino, 651 blk_t blk, int blockcnt); 652extern errcode_t ext2fs_copy_dblist(ext2_dblist src, 653 ext2_dblist *dest); 654extern int ext2fs_dblist_count(ext2_dblist dblist); 655extern errcode_t ext2fs_dblist_get_last(ext2_dblist dblist, 656 struct ext2_db_entry **entry); 657extern errcode_t ext2fs_dblist_drop_last(ext2_dblist dblist); 658 659/* dblist_dir.c */ 660extern errcode_t 661 ext2fs_dblist_dir_iterate(ext2_dblist dblist, 662 int flags, 663 char *block_buf, 664 int (*func)(ext2_ino_t dir, 665 int entry, 666 struct ext2_dir_entry *dirent, 667 int offset, 668 int blocksize, 669 char *buf, 670 void *priv_data), 671 void *priv_data); 672 673/* dirblock.c */ 674extern errcode_t ext2fs_read_dir_block(ext2_filsys fs, blk_t block, 675 void *buf); 676extern errcode_t ext2fs_read_dir_block2(ext2_filsys fs, blk_t block, 677 void *buf, int flags); 678extern errcode_t ext2fs_write_dir_block(ext2_filsys fs, blk_t block, 679 void *buf); 680extern errcode_t ext2fs_write_dir_block2(ext2_filsys fs, blk_t block, 681 void *buf, int flags); 682 683/* dirhash.c */ 684extern errcode_t ext2fs_dirhash(int version, const char *name, int len, 685 const __u32 *seed, 686 ext2_dirhash_t *ret_hash, 687 ext2_dirhash_t *ret_minor_hash); 688 689 690/* dir_iterate.c */ 691extern errcode_t ext2fs_dir_iterate(ext2_filsys fs, 692 ext2_ino_t dir, 693 int flags, 694 char *block_buf, 695 int (*func)(struct ext2_dir_entry *dirent, 696 int offset, 697 int blocksize, 698 char *buf, 699 void *priv_data), 700 void *priv_data); 701extern errcode_t ext2fs_dir_iterate2(ext2_filsys fs, 702 ext2_ino_t dir, 703 int flags, 704 char *block_buf, 705 int (*func)(ext2_ino_t dir, 706 int entry, 707 struct ext2_dir_entry *dirent, 708 int offset, 709 int blocksize, 710 char *buf, 711 void *priv_data), 712 void *priv_data); 713 714/* dupfs.c */ 715extern errcode_t ext2fs_dup_handle(ext2_filsys src, ext2_filsys *dest); 716 717/* expanddir.c */ 718extern errcode_t ext2fs_expand_dir(ext2_filsys fs, ext2_ino_t dir); 719 720/* ext_attr.c */ 721extern errcode_t ext2fs_read_ext_attr(ext2_filsys fs, blk_t block, void *buf); 722extern errcode_t ext2fs_write_ext_attr(ext2_filsys fs, blk_t block, 723 void *buf); 724extern errcode_t ext2fs_adjust_ea_refcount(ext2_filsys fs, blk_t blk, 725 char *block_buf, 726 int adjust, __u32 *newcount); 727 728/* fileio.c */ 729extern errcode_t ext2fs_file_open2(ext2_filsys fs, ext2_ino_t ino, 730 struct ext2_inode *inode, 731 int flags, ext2_file_t *ret); 732extern errcode_t ext2fs_file_open(ext2_filsys fs, ext2_ino_t ino, 733 int flags, ext2_file_t *ret); 734extern ext2_filsys ext2fs_file_get_fs(ext2_file_t file); 735extern errcode_t ext2fs_file_close(ext2_file_t file); 736extern errcode_t ext2fs_file_flush(ext2_file_t file); 737extern errcode_t ext2fs_file_read(ext2_file_t file, void *buf, 738 unsigned int wanted, unsigned int *got); 739extern errcode_t ext2fs_file_write(ext2_file_t file, const void *buf, 740 unsigned int nbytes, unsigned int *written); 741extern errcode_t ext2fs_file_llseek(ext2_file_t file, __u64 offset, 742 int whence, __u64 *ret_pos); 743extern errcode_t ext2fs_file_lseek(ext2_file_t file, ext2_off_t offset, 744 int whence, ext2_off_t *ret_pos); 745errcode_t ext2fs_file_get_lsize(ext2_file_t file, __u64 *ret_size); 746extern ext2_off_t ext2fs_file_get_size(ext2_file_t file); 747extern errcode_t ext2fs_file_set_size(ext2_file_t file, ext2_off_t size); 748 749/* finddev.c */ 750extern char *ext2fs_find_block_device(dev_t device); 751 752/* flushb.c */ 753extern errcode_t ext2fs_sync_device(int fd, int flushb); 754 755/* freefs.c */ 756extern void ext2fs_free(ext2_filsys fs); 757extern void ext2fs_free_generic_bitmap(ext2fs_inode_bitmap bitmap); 758extern void ext2fs_free_block_bitmap(ext2fs_block_bitmap bitmap); 759extern void ext2fs_free_inode_bitmap(ext2fs_inode_bitmap bitmap); 760extern void ext2fs_free_dblist(ext2_dblist dblist); 761extern void ext2fs_badblocks_list_free(ext2_badblocks_list bb); 762extern void ext2fs_u32_list_free(ext2_u32_list bb); 763 764/* getsize.c */ 765extern errcode_t ext2fs_get_device_size(const char *file, int blocksize, 766 blk_t *retblocks); 767 768/* getsectsize.c */ 769errcode_t ext2fs_get_device_sectsize(const char *file, int *sectsize); 770 771/* imager.c */ 772extern errcode_t ext2fs_image_inode_write(ext2_filsys fs, int fd, int flags); 773extern errcode_t ext2fs_image_inode_read(ext2_filsys fs, int fd, int flags); 774extern errcode_t ext2fs_image_super_write(ext2_filsys fs, int fd, int flags); 775extern errcode_t ext2fs_image_super_read(ext2_filsys fs, int fd, int flags); 776extern errcode_t ext2fs_image_bitmap_write(ext2_filsys fs, int fd, int flags); 777extern errcode_t ext2fs_image_bitmap_read(ext2_filsys fs, int fd, int flags); 778 779/* ind_block.c */ 780errcode_t ext2fs_read_ind_block(ext2_filsys fs, blk_t blk, void *buf); 781errcode_t ext2fs_write_ind_block(ext2_filsys fs, blk_t blk, void *buf); 782 783/* initialize.c */ 784extern errcode_t ext2fs_initialize(const char *name, int flags, 785 struct ext2_super_block *param, 786 io_manager manager, ext2_filsys *ret_fs); 787 788/* icount.c */ 789extern void ext2fs_free_icount(ext2_icount_t icount); 790extern errcode_t ext2fs_create_icount_tdb(ext2_filsys fs, char *tdb_dir, 791 int flags, ext2_icount_t *ret); 792extern errcode_t ext2fs_create_icount2(ext2_filsys fs, int flags, 793 unsigned int size, 794 ext2_icount_t hint, ext2_icount_t *ret); 795extern errcode_t ext2fs_create_icount(ext2_filsys fs, int flags, 796 unsigned int size, 797 ext2_icount_t *ret); 798extern errcode_t ext2fs_icount_fetch(ext2_icount_t icount, ext2_ino_t ino, 799 __u16 *ret); 800extern errcode_t ext2fs_icount_increment(ext2_icount_t icount, ext2_ino_t ino, 801 __u16 *ret); 802extern errcode_t ext2fs_icount_decrement(ext2_icount_t icount, ext2_ino_t ino, 803 __u16 *ret); 804extern errcode_t ext2fs_icount_store(ext2_icount_t icount, ext2_ino_t ino, 805 __u16 count); 806extern ext2_ino_t ext2fs_get_icount_size(ext2_icount_t icount); 807errcode_t ext2fs_icount_validate(ext2_icount_t icount, FILE *); 808 809/* inode.c */ 810extern errcode_t ext2fs_flush_icache(ext2_filsys fs); 811extern errcode_t ext2fs_get_next_inode_full(ext2_inode_scan scan, 812 ext2_ino_t *ino, 813 struct ext2_inode *inode, 814 int bufsize); 815extern errcode_t ext2fs_open_inode_scan(ext2_filsys fs, int buffer_blocks, 816 ext2_inode_scan *ret_scan); 817extern void ext2fs_close_inode_scan(ext2_inode_scan scan); 818extern errcode_t ext2fs_get_next_inode(ext2_inode_scan scan, ext2_ino_t *ino, 819 struct ext2_inode *inode); 820extern errcode_t ext2fs_inode_scan_goto_blockgroup(ext2_inode_scan scan, 821 int group); 822extern void ext2fs_set_inode_callback 823 (ext2_inode_scan scan, 824 errcode_t (*done_group)(ext2_filsys fs, 825 ext2_inode_scan scan, 826 dgrp_t group, 827 void * priv_data), 828 void *done_group_data); 829extern int ext2fs_inode_scan_flags(ext2_inode_scan scan, int set_flags, 830 int clear_flags); 831extern errcode_t ext2fs_read_inode_full(ext2_filsys fs, ext2_ino_t ino, 832 struct ext2_inode * inode, 833 int bufsize); 834extern errcode_t ext2fs_read_inode (ext2_filsys fs, ext2_ino_t ino, 835 struct ext2_inode * inode); 836extern errcode_t ext2fs_write_inode_full(ext2_filsys fs, ext2_ino_t ino, 837 struct ext2_inode * inode, 838 int bufsize); 839extern errcode_t ext2fs_write_inode(ext2_filsys fs, ext2_ino_t ino, 840 struct ext2_inode * inode); 841extern errcode_t ext2fs_write_new_inode(ext2_filsys fs, ext2_ino_t ino, 842 struct ext2_inode * inode); 843extern errcode_t ext2fs_get_blocks(ext2_filsys fs, ext2_ino_t ino, blk_t *blocks); 844extern errcode_t ext2fs_check_directory(ext2_filsys fs, ext2_ino_t ino); 845 846/* inode_io.c */ 847extern io_manager inode_io_manager; 848extern errcode_t ext2fs_inode_io_intern(ext2_filsys fs, ext2_ino_t ino, 849 char **name); 850extern errcode_t ext2fs_inode_io_intern2(ext2_filsys fs, ext2_ino_t ino, 851 struct ext2_inode *inode, 852 char **name); 853 854/* ismounted.c */ 855extern errcode_t ext2fs_check_if_mounted(const char *file, int *mount_flags); 856extern errcode_t ext2fs_check_mount_point(const char *device, int *mount_flags, 857 char *mtpt, int mtlen); 858 859/* namei.c */ 860extern errcode_t ext2fs_lookup(ext2_filsys fs, ext2_ino_t dir, const char *name, 861 int namelen, char *buf, ext2_ino_t *inode); 862extern errcode_t ext2fs_namei(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd, 863 const char *name, ext2_ino_t *inode); 864errcode_t ext2fs_namei_follow(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd, 865 const char *name, ext2_ino_t *inode); 866extern errcode_t ext2fs_follow_link(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd, 867 ext2_ino_t inode, ext2_ino_t *res_inode); 868 869/* native.c */ 870int ext2fs_native_flag(void); 871 872/* newdir.c */ 873extern errcode_t ext2fs_new_dir_block(ext2_filsys fs, ext2_ino_t dir_ino, 874 ext2_ino_t parent_ino, char **block); 875 876/* mkdir.c */ 877extern errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum, 878 const char *name); 879 880/* mkjournal.c */ 881extern errcode_t ext2fs_create_journal_superblock(ext2_filsys fs, 882 __u32 size, int flags, 883 char **ret_jsb); 884extern errcode_t ext2fs_add_journal_device(ext2_filsys fs, 885 ext2_filsys journal_dev); 886extern errcode_t ext2fs_add_journal_inode(ext2_filsys fs, blk_t size, 887 int flags); 888extern int ext2fs_default_journal_size(__u64 blocks); 889 890/* openfs.c */ 891extern errcode_t ext2fs_open(const char *name, int flags, int superblock, 892 unsigned int block_size, io_manager manager, 893 ext2_filsys *ret_fs); 894extern errcode_t ext2fs_open2(const char *name, const char *io_options, 895 int flags, int superblock, 896 unsigned int block_size, io_manager manager, 897 ext2_filsys *ret_fs); 898extern blk_t ext2fs_descriptor_block_loc(ext2_filsys fs, blk_t group_block, 899 dgrp_t i); 900errcode_t ext2fs_get_data_io(ext2_filsys fs, io_channel *old_io); 901errcode_t ext2fs_set_data_io(ext2_filsys fs, io_channel new_io); 902errcode_t ext2fs_rewrite_to_io(ext2_filsys fs, io_channel new_io); 903 904/* get_pathname.c */ 905extern errcode_t ext2fs_get_pathname(ext2_filsys fs, ext2_ino_t dir, ext2_ino_t ino, 906 char **name); 907 908/* link.c */ 909errcode_t ext2fs_link(ext2_filsys fs, ext2_ino_t dir, const char *name, 910 ext2_ino_t ino, int flags); 911errcode_t ext2fs_unlink(ext2_filsys fs, ext2_ino_t dir, const char *name, 912 ext2_ino_t ino, int flags); 913 914/* read_bb.c */ 915extern errcode_t ext2fs_read_bb_inode(ext2_filsys fs, 916 ext2_badblocks_list *bb_list); 917 918/* read_bb_file.c */ 919extern errcode_t ext2fs_read_bb_FILE2(ext2_filsys fs, FILE *f, 920 ext2_badblocks_list *bb_list, 921 void *priv_data, 922 void (*invalid)(ext2_filsys fs, 923 blk_t blk, 924 char *badstr, 925 void *priv_data)); 926extern errcode_t ext2fs_read_bb_FILE(ext2_filsys fs, FILE *f, 927 ext2_badblocks_list *bb_list, 928 void (*invalid)(ext2_filsys fs, 929 blk_t blk)); 930 931/* res_gdt.c */ 932extern errcode_t ext2fs_create_resize_inode(ext2_filsys fs); 933 934/* rs_bitmap.c */ 935extern errcode_t ext2fs_resize_generic_bitmap(__u32 new_end, 936 __u32 new_real_end, 937 ext2fs_generic_bitmap bmap); 938extern errcode_t ext2fs_resize_inode_bitmap(__u32 new_end, __u32 new_real_end, 939 ext2fs_inode_bitmap bmap); 940extern errcode_t ext2fs_resize_block_bitmap(__u32 new_end, __u32 new_real_end, 941 ext2fs_block_bitmap bmap); 942extern errcode_t ext2fs_copy_bitmap(ext2fs_generic_bitmap src, 943 ext2fs_generic_bitmap *dest); 944 945/* swapfs.c */ 946extern void ext2fs_swap_ext_attr(char *to, char *from, int bufsize, 947 int has_header); 948extern void ext2fs_swap_super(struct ext2_super_block * super); 949extern void ext2fs_swap_group_desc(struct ext2_group_desc *gdp); 950extern void ext2fs_swap_inode_full(ext2_filsys fs, struct ext2_inode_large *t, 951 struct ext2_inode_large *f, int hostorder, 952 int bufsize); 953extern void ext2fs_swap_inode(ext2_filsys fs,struct ext2_inode *t, 954 struct ext2_inode *f, int hostorder); 955 956/* valid_blk.c */ 957extern int ext2fs_inode_has_valid_blocks(struct ext2_inode *inode); 958 959/* version.c */ 960extern int ext2fs_parse_version_string(const char *ver_string); 961extern int ext2fs_get_library_version(const char **ver_string, 962 const char **date_string); 963 964/* write_bb_file.c */ 965extern errcode_t ext2fs_write_bb_FILE(ext2_badblocks_list bb_list, 966 unsigned int flags, 967 FILE *f); 968 969 970/* inline functions */ 971extern errcode_t ext2fs_get_mem(unsigned long size, void *ptr); 972extern errcode_t ext2fs_get_array(unsigned long count, unsigned long size, void *ptr); 973extern errcode_t ext2fs_free_mem(void *ptr); 974extern errcode_t ext2fs_resize_mem(unsigned long old_size, 975 unsigned long size, void *ptr); 976extern void ext2fs_mark_super_dirty(ext2_filsys fs); 977extern void ext2fs_mark_changed(ext2_filsys fs); 978extern int ext2fs_test_changed(ext2_filsys fs); 979extern void ext2fs_mark_valid(ext2_filsys fs); 980extern void ext2fs_unmark_valid(ext2_filsys fs); 981extern int ext2fs_test_valid(ext2_filsys fs); 982extern void ext2fs_mark_ib_dirty(ext2_filsys fs); 983extern void ext2fs_mark_bb_dirty(ext2_filsys fs); 984extern int ext2fs_test_ib_dirty(ext2_filsys fs); 985extern int ext2fs_test_bb_dirty(ext2_filsys fs); 986extern int ext2fs_group_of_blk(ext2_filsys fs, blk_t blk); 987extern int ext2fs_group_of_ino(ext2_filsys fs, ext2_ino_t ino); 988extern blk_t ext2fs_group_first_block(ext2_filsys fs, dgrp_t group); 989extern blk_t ext2fs_group_last_block(ext2_filsys fs, dgrp_t group); 990extern blk_t ext2fs_inode_data_blocks(ext2_filsys fs, 991 struct ext2_inode *inode); 992extern unsigned int ext2fs_div_ceil(unsigned int a, unsigned int b); 993 994/* 995 * The actual inlined functions definitions themselves... 996 * 997 * If NO_INLINE_FUNCS is defined, then we won't try to do inline 998 * functions at all! 999 */ 1000#if (defined(INCLUDE_INLINE_FUNCS) || !defined(NO_INLINE_FUNCS)) 1001#ifdef INCLUDE_INLINE_FUNCS 1002#define _INLINE_ extern 1003#else 1004#ifdef __GNUC__ 1005#define _INLINE_ extern __inline__ 1006#else /* For Watcom C */ 1007#define _INLINE_ extern inline 1008#endif 1009#endif 1010 1011#ifndef EXT2_CUSTOM_MEMORY_ROUTINES 1012#include <string.h> 1013/* 1014 * Allocate memory 1015 */ 1016_INLINE_ errcode_t ext2fs_get_mem(unsigned long size, void *ptr) 1017{ 1018 void *pp; 1019 1020 pp = malloc(size); 1021 if (!pp) 1022 return EXT2_ET_NO_MEMORY; 1023 memcpy(ptr, &pp, sizeof (pp)); 1024 return 0; 1025} 1026 1027_INLINE_ errcode_t ext2fs_get_array(unsigned long count, unsigned long size, void *ptr) 1028{ 1029 if (count && (-1UL)/count<size) 1030 return EXT2_ET_NO_MEMORY; //maybe define EXT2_ET_OVERFLOW ? 1031 return ext2fs_get_mem(count*size, ptr); 1032} 1033 1034/* 1035 * Free memory 1036 */ 1037_INLINE_ errcode_t ext2fs_free_mem(void *ptr) 1038{ 1039 void *p; 1040 1041 memcpy(&p, ptr, sizeof(p)); 1042 free(p); 1043 p = 0; 1044 memcpy(ptr, &p, sizeof(p)); 1045 return 0; 1046} 1047 1048/* 1049 * Resize memory 1050 */ 1051_INLINE_ errcode_t ext2fs_resize_mem(unsigned long EXT2FS_ATTR((unused)) old_size, 1052 unsigned long size, void *ptr) 1053{ 1054 void *p; 1055 1056 /* Use "memcpy" for pointer assignments here to avoid problems 1057 * with C99 strict type aliasing rules. */ 1058 memcpy(&p, ptr, sizeof(p)); 1059 p = realloc(p, size); 1060 if (!p) 1061 return EXT2_ET_NO_MEMORY; 1062 memcpy(ptr, &p, sizeof(p)); 1063 return 0; 1064} 1065#endif /* Custom memory routines */ 1066 1067/* 1068 * Mark a filesystem superblock as dirty 1069 */ 1070_INLINE_ void ext2fs_mark_super_dirty(ext2_filsys fs) 1071{ 1072 fs->flags |= EXT2_FLAG_DIRTY | EXT2_FLAG_CHANGED; 1073} 1074 1075/* 1076 * Mark a filesystem as changed 1077 */ 1078_INLINE_ void ext2fs_mark_changed(ext2_filsys fs) 1079{ 1080 fs->flags |= EXT2_FLAG_CHANGED; 1081} 1082 1083/* 1084 * Check to see if a filesystem has changed 1085 */ 1086_INLINE_ int ext2fs_test_changed(ext2_filsys fs) 1087{ 1088 return (fs->flags & EXT2_FLAG_CHANGED); 1089} 1090 1091/* 1092 * Mark a filesystem as valid 1093 */ 1094_INLINE_ void ext2fs_mark_valid(ext2_filsys fs) 1095{ 1096 fs->flags |= EXT2_FLAG_VALID; 1097} 1098 1099/* 1100 * Mark a filesystem as NOT valid 1101 */ 1102_INLINE_ void ext2fs_unmark_valid(ext2_filsys fs) 1103{ 1104 fs->flags &= ~EXT2_FLAG_VALID; 1105} 1106 1107/* 1108 * Check to see if a filesystem is valid 1109 */ 1110_INLINE_ int ext2fs_test_valid(ext2_filsys fs) 1111{ 1112 return (fs->flags & EXT2_FLAG_VALID); 1113} 1114 1115/* 1116 * Mark the inode bitmap as dirty 1117 */ 1118_INLINE_ void ext2fs_mark_ib_dirty(ext2_filsys fs) 1119{ 1120 fs->flags |= EXT2_FLAG_IB_DIRTY | EXT2_FLAG_CHANGED; 1121} 1122 1123/* 1124 * Mark the block bitmap as dirty 1125 */ 1126_INLINE_ void ext2fs_mark_bb_dirty(ext2_filsys fs) 1127{ 1128 fs->flags |= EXT2_FLAG_BB_DIRTY | EXT2_FLAG_CHANGED; 1129} 1130 1131/* 1132 * Check to see if a filesystem's inode bitmap is dirty 1133 */ 1134_INLINE_ int ext2fs_test_ib_dirty(ext2_filsys fs) 1135{ 1136 return (fs->flags & EXT2_FLAG_IB_DIRTY); 1137} 1138 1139/* 1140 * Check to see if a filesystem's block bitmap is dirty 1141 */ 1142_INLINE_ int ext2fs_test_bb_dirty(ext2_filsys fs) 1143{ 1144 return (fs->flags & EXT2_FLAG_BB_DIRTY); 1145} 1146 1147/* 1148 * Return the group # of a block 1149 */ 1150_INLINE_ int ext2fs_group_of_blk(ext2_filsys fs, blk_t blk) 1151{ 1152 return (blk - fs->super->s_first_data_block) / 1153 fs->super->s_blocks_per_group; 1154} 1155 1156/* 1157 * Return the group # of an inode number 1158 */ 1159_INLINE_ int ext2fs_group_of_ino(ext2_filsys fs, ext2_ino_t ino) 1160{ 1161 return (ino - 1) / fs->super->s_inodes_per_group; 1162} 1163 1164/* 1165 * Return the first block (inclusive) in a group 1166 */ 1167_INLINE_ blk_t ext2fs_group_first_block(ext2_filsys fs, dgrp_t group) 1168{ 1169 return fs->super->s_first_data_block + 1170 (group * fs->super->s_blocks_per_group); 1171} 1172 1173/* 1174 * Return the last block (inclusive) in a group 1175 */ 1176_INLINE_ blk_t ext2fs_group_last_block(ext2_filsys fs, dgrp_t group) 1177{ 1178 return (group == fs->group_desc_count - 1 ? 1179 fs->super->s_blocks_count - 1 : 1180 ext2fs_group_first_block(fs, group) + 1181 (fs->super->s_blocks_per_group - 1)); 1182} 1183 1184_INLINE_ blk_t ext2fs_inode_data_blocks(ext2_filsys fs, 1185 struct ext2_inode *inode) 1186{ 1187 return inode->i_blocks - 1188 (inode->i_file_acl ? fs->blocksize >> 9 : 0); 1189} 1190 1191/* 1192 * This is an efficient, overflow safe way of calculating ceil((1.0 * a) / b) 1193 */ 1194_INLINE_ unsigned int ext2fs_div_ceil(unsigned int a, unsigned int b) 1195{ 1196 if (!a) 1197 return 0; 1198 return ((a - 1) / b) + 1; 1199} 1200#undef _INLINE_ 1201#endif 1202 1203#ifdef __cplusplus 1204} 1205#endif 1206 1207#endif /* _EXT2FS_EXT2FS_H */ 1208