ext2fs.h revision e5aace908e9d1161a594944d9360f9f0cdd18099
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 191 192/* 193 * Special flag in the ext2 inode i_flag field that means that this is 194 * a new inode. (So that ext2_write_inode() can clear extra fields.) 195 */ 196#define EXT2_NEW_INODE_FL 0x80000000 197 198/* 199 * Flags for mkjournal 200 * 201 * EXT2_MKJOURNAL_V1_SUPER Make a (deprecated) V1 journal superblock 202 */ 203#define EXT2_MKJOURNAL_V1_SUPER 0x0000001 204 205struct struct_ext2_filsys { 206 errcode_t magic; 207 io_channel io; 208 int flags; 209 char * device_name; 210 struct ext2_super_block * super; 211 unsigned int blocksize; 212 int fragsize; 213 dgrp_t group_desc_count; 214 unsigned long desc_blocks; 215 struct ext2_group_desc * group_desc; 216 int inode_blocks_per_group; 217 ext2fs_inode_bitmap inode_map; 218 ext2fs_block_bitmap block_map; 219 errcode_t (*get_blocks)(ext2_filsys fs, ext2_ino_t ino, blk_t *blocks); 220 errcode_t (*check_directory)(ext2_filsys fs, ext2_ino_t ino); 221 errcode_t (*write_bitmaps)(ext2_filsys fs); 222 errcode_t (*read_inode)(ext2_filsys fs, ext2_ino_t ino, 223 struct ext2_inode *inode); 224 errcode_t (*write_inode)(ext2_filsys fs, ext2_ino_t ino, 225 struct ext2_inode *inode); 226 ext2_badblocks_list badblocks; 227 ext2_dblist dblist; 228 __u32 stride; /* for mke2fs */ 229 struct ext2_super_block * orig_super; 230 struct ext2_image_hdr * image_header; 231 __u32 umask; 232 time_t now; 233 /* 234 * Reserved for future expansion 235 */ 236 __u32 reserved[7]; 237 238 /* 239 * Reserved for the use of the calling application. 240 */ 241 void * priv_data; 242 243 /* 244 * Inode cache 245 */ 246 struct ext2_inode_cache *icache; 247 io_channel image_io; 248}; 249 250#if EXT2_FLAT_INCLUDES 251#include "e2_bitops.h" 252#else 253#include <ext2fs/bitops.h> 254#endif 255 256/* 257 * Return flags for the block iterator functions 258 */ 259#define BLOCK_CHANGED 1 260#define BLOCK_ABORT 2 261#define BLOCK_ERROR 4 262 263/* 264 * Block interate flags 265 * 266 * BLOCK_FLAG_APPEND, or BLOCK_FLAG_HOLE, indicates that the interator 267 * function should be called on blocks where the block number is zero. 268 * This is used by ext2fs_expand_dir() to be able to add a new block 269 * to an inode. It can also be used for programs that want to be able 270 * to deal with files that contain "holes". 271 * 272 * BLOCK_FLAG_DEPTH_TRAVERSE indicates that the iterator function for 273 * the indirect, doubly indirect, etc. blocks should be called after 274 * all of the blocks containined in the indirect blocks are processed. 275 * This is useful if you are going to be deallocating blocks from an 276 * inode. 277 * 278 * BLOCK_FLAG_DATA_ONLY indicates that the iterator function should be 279 * called for data blocks only. 280 * 281 * BLOCK_FLAG_NO_LARGE is for internal use only. It informs 282 * ext2fs_block_iterate2 that large files won't be accepted. 283 */ 284#define BLOCK_FLAG_APPEND 1 285#define BLOCK_FLAG_HOLE 1 286#define BLOCK_FLAG_DEPTH_TRAVERSE 2 287#define BLOCK_FLAG_DATA_ONLY 4 288 289#define BLOCK_FLAG_NO_LARGE 0x1000 290 291/* 292 * Magic "block count" return values for the block iterator function. 293 */ 294#define BLOCK_COUNT_IND (-1) 295#define BLOCK_COUNT_DIND (-2) 296#define BLOCK_COUNT_TIND (-3) 297#define BLOCK_COUNT_TRANSLATOR (-4) 298 299#if 0 300/* 301 * Flags for ext2fs_move_blocks 302 */ 303#define EXT2_BMOVE_GET_DBLIST 0x0001 304#define EXT2_BMOVE_DEBUG 0x0002 305#endif 306 307/* 308 * Flags for directory block reading and writing functions 309 */ 310#define EXT2_DIRBLOCK_V2_STRUCT 0x0001 311 312/* 313 * Return flags for the directory iterator functions 314 */ 315#define DIRENT_CHANGED 1 316#define DIRENT_ABORT 2 317#define DIRENT_ERROR 3 318 319/* 320 * Directory iterator flags 321 */ 322 323#define DIRENT_FLAG_INCLUDE_EMPTY 1 324#define DIRENT_FLAG_INCLUDE_REMOVED 2 325 326#define DIRENT_DOT_FILE 1 327#define DIRENT_DOT_DOT_FILE 2 328#define DIRENT_OTHER_FILE 3 329#define DIRENT_DELETED_FILE 4 330 331/* 332 * Inode scan definitions 333 */ 334typedef struct ext2_struct_inode_scan *ext2_inode_scan; 335 336/* 337 * ext2fs_scan flags 338 */ 339#define EXT2_SF_CHK_BADBLOCKS 0x0001 340#define EXT2_SF_BAD_INODE_BLK 0x0002 341#define EXT2_SF_BAD_EXTRA_BYTES 0x0004 342#define EXT2_SF_SKIP_MISSING_ITABLE 0x0008 343#define EXT2_SF_DO_LAZY 0x0010 344 345/* 346 * ext2fs_check_if_mounted flags 347 */ 348#define EXT2_MF_MOUNTED 1 349#define EXT2_MF_ISROOT 2 350#define EXT2_MF_READONLY 4 351#define EXT2_MF_SWAP 8 352#define EXT2_MF_BUSY 16 353 354/* 355 * Ext2/linux mode flags. We define them here so that we don't need 356 * to depend on the OS's sys/stat.h, since we may be compiling on a 357 * non-Linux system. 358 */ 359#define LINUX_S_IFMT 00170000 360#define LINUX_S_IFSOCK 0140000 361#define LINUX_S_IFLNK 0120000 362#define LINUX_S_IFREG 0100000 363#define LINUX_S_IFBLK 0060000 364#define LINUX_S_IFDIR 0040000 365#define LINUX_S_IFCHR 0020000 366#define LINUX_S_IFIFO 0010000 367#define LINUX_S_ISUID 0004000 368#define LINUX_S_ISGID 0002000 369#define LINUX_S_ISVTX 0001000 370 371#define LINUX_S_IRWXU 00700 372#define LINUX_S_IRUSR 00400 373#define LINUX_S_IWUSR 00200 374#define LINUX_S_IXUSR 00100 375 376#define LINUX_S_IRWXG 00070 377#define LINUX_S_IRGRP 00040 378#define LINUX_S_IWGRP 00020 379#define LINUX_S_IXGRP 00010 380 381#define LINUX_S_IRWXO 00007 382#define LINUX_S_IROTH 00004 383#define LINUX_S_IWOTH 00002 384#define LINUX_S_IXOTH 00001 385 386#define LINUX_S_ISLNK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFLNK) 387#define LINUX_S_ISREG(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFREG) 388#define LINUX_S_ISDIR(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFDIR) 389#define LINUX_S_ISCHR(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFCHR) 390#define LINUX_S_ISBLK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFBLK) 391#define LINUX_S_ISFIFO(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFIFO) 392#define LINUX_S_ISSOCK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFSOCK) 393 394/* 395 * ext2 size of an inode 396 */ 397#define EXT2_I_SIZE(i) ((i)->i_size | ((__u64) (i)->i_size_high << 32)) 398 399/* 400 * ext2_icount_t abstraction 401 */ 402#define EXT2_ICOUNT_OPT_INCREMENT 0x01 403 404typedef struct ext2_icount *ext2_icount_t; 405 406/* 407 * Flags for ext2fs_bmap 408 */ 409#define BMAP_ALLOC 0x0001 410#define BMAP_SET 0x0002 411 412/* 413 * Flags for imager.c functions 414 */ 415#define IMAGER_FLAG_INODEMAP 1 416#define IMAGER_FLAG_SPARSEWRITE 2 417 418/* 419 * For checking structure magic numbers... 420 */ 421 422#define EXT2_CHECK_MAGIC(struct, code) \ 423 if ((struct)->magic != (code)) return (code) 424 425 426/* 427 * For ext2 compression support 428 */ 429#define EXT2FS_COMPRESSED_BLKADDR ((blk_t) 0xffffffff) 430#define HOLE_BLKADDR(_b) ((_b) == 0 || (_b) == EXT2FS_COMPRESSED_BLKADDR) 431 432/* 433 * Features supported by this version of the library 434 */ 435#define EXT2_LIB_FEATURE_COMPAT_SUPP (EXT2_FEATURE_COMPAT_DIR_PREALLOC|\ 436 EXT2_FEATURE_COMPAT_IMAGIC_INODES|\ 437 EXT3_FEATURE_COMPAT_HAS_JOURNAL|\ 438 EXT2_FEATURE_COMPAT_RESIZE_INODE|\ 439 EXT2_FEATURE_COMPAT_DIR_INDEX|\ 440 EXT2_FEATURE_COMPAT_LAZY_BG|\ 441 EXT2_FEATURE_COMPAT_EXT_ATTR) 442 443/* This #ifdef is temporary until compression is fully supported */ 444#ifdef ENABLE_COMPRESSION 445#ifndef I_KNOW_THAT_COMPRESSION_IS_EXPERIMENTAL 446/* If the below warning bugs you, then have 447 `CPPFLAGS=-DI_KNOW_THAT_COMPRESSION_IS_EXPERIMENTAL' in your 448 environment at configure time. */ 449 #warning "Compression support is experimental" 450#endif 451#define EXT2_LIB_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE|\ 452 EXT2_FEATURE_INCOMPAT_COMPRESSION|\ 453 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV|\ 454 EXT2_FEATURE_INCOMPAT_META_BG|\ 455 EXT3_FEATURE_INCOMPAT_RECOVER) 456#else 457#define EXT2_LIB_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE|\ 458 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV|\ 459 EXT2_FEATURE_INCOMPAT_META_BG|\ 460 EXT3_FEATURE_INCOMPAT_RECOVER) 461#endif 462#define EXT2_LIB_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER|\ 463 EXT2_FEATURE_RO_COMPAT_LARGE_FILE) 464 465/* 466 * These features are only allowed if EXT2_FLAG_SOFTSUPP_FEATURES is passed 467 * to ext2fs_openfs() 468 */ 469#define EXT2_LIB_SOFTSUPP_INCOMPAT (EXT3_FEATURE_INCOMPAT_EXTENTS) 470#define EXT2_LIB_SOFTSUPP_RO_COMPAT (EXT4_FEATURE_RO_COMPAT_HUGE_FILE|\ 471 EXT4_FEATURE_RO_COMPAT_GDT_CSUM|\ 472 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|\ 473 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE) 474 475/* 476 * function prototypes 477 */ 478 479/* alloc.c */ 480extern errcode_t ext2fs_new_inode(ext2_filsys fs, ext2_ino_t dir, int mode, 481 ext2fs_inode_bitmap map, ext2_ino_t *ret); 482extern errcode_t ext2fs_new_block(ext2_filsys fs, blk_t goal, 483 ext2fs_block_bitmap map, blk_t *ret); 484extern errcode_t ext2fs_get_free_blocks(ext2_filsys fs, blk_t start, 485 blk_t finish, int num, 486 ext2fs_block_bitmap map, 487 blk_t *ret); 488extern errcode_t ext2fs_alloc_block(ext2_filsys fs, blk_t goal, 489 char *block_buf, blk_t *ret); 490 491/* alloc_sb.c */ 492extern int ext2fs_reserve_super_and_bgd(ext2_filsys fs, 493 dgrp_t group, 494 ext2fs_block_bitmap bmap); 495 496/* alloc_stats.c */ 497void ext2fs_inode_alloc_stats(ext2_filsys fs, ext2_ino_t ino, int inuse); 498void ext2fs_inode_alloc_stats2(ext2_filsys fs, ext2_ino_t ino, 499 int inuse, int isdir); 500void ext2fs_block_alloc_stats(ext2_filsys fs, blk_t blk, int inuse); 501 502/* alloc_tables.c */ 503extern errcode_t ext2fs_allocate_tables(ext2_filsys fs); 504extern errcode_t ext2fs_allocate_group_table(ext2_filsys fs, dgrp_t group, 505 ext2fs_block_bitmap bmap); 506 507/* badblocks.c */ 508extern errcode_t ext2fs_u32_list_create(ext2_u32_list *ret, int size); 509extern errcode_t ext2fs_u32_list_add(ext2_u32_list bb, __u32 blk); 510extern int ext2fs_u32_list_find(ext2_u32_list bb, __u32 blk); 511extern int ext2fs_u32_list_test(ext2_u32_list bb, blk_t blk); 512extern errcode_t ext2fs_u32_list_iterate_begin(ext2_u32_list bb, 513 ext2_u32_iterate *ret); 514extern int ext2fs_u32_list_iterate(ext2_u32_iterate iter, blk_t *blk); 515extern void ext2fs_u32_list_iterate_end(ext2_u32_iterate iter); 516extern errcode_t ext2fs_u32_copy(ext2_u32_list src, ext2_u32_list *dest); 517extern int ext2fs_u32_list_equal(ext2_u32_list bb1, ext2_u32_list bb2); 518 519extern errcode_t ext2fs_badblocks_list_create(ext2_badblocks_list *ret, 520 int size); 521extern errcode_t ext2fs_badblocks_list_add(ext2_badblocks_list bb, 522 blk_t blk); 523extern int ext2fs_badblocks_list_test(ext2_badblocks_list bb, 524 blk_t blk); 525extern int ext2fs_u32_list_del(ext2_u32_list bb, __u32 blk); 526extern void ext2fs_badblocks_list_del(ext2_u32_list bb, __u32 blk); 527extern errcode_t 528 ext2fs_badblocks_list_iterate_begin(ext2_badblocks_list bb, 529 ext2_badblocks_iterate *ret); 530extern int ext2fs_badblocks_list_iterate(ext2_badblocks_iterate iter, 531 blk_t *blk); 532extern void ext2fs_badblocks_list_iterate_end(ext2_badblocks_iterate iter); 533extern errcode_t ext2fs_badblocks_copy(ext2_badblocks_list src, 534 ext2_badblocks_list *dest); 535extern int ext2fs_badblocks_equal(ext2_badblocks_list bb1, 536 ext2_badblocks_list bb2); 537extern int ext2fs_u32_list_count(ext2_u32_list bb); 538 539/* bb_compat */ 540extern errcode_t badblocks_list_create(badblocks_list *ret, int size); 541extern errcode_t badblocks_list_add(badblocks_list bb, blk_t blk); 542extern int badblocks_list_test(badblocks_list bb, blk_t blk); 543extern errcode_t badblocks_list_iterate_begin(badblocks_list bb, 544 badblocks_iterate *ret); 545extern int badblocks_list_iterate(badblocks_iterate iter, blk_t *blk); 546extern void badblocks_list_iterate_end(badblocks_iterate iter); 547extern void badblocks_list_free(badblocks_list bb); 548 549/* bb_inode.c */ 550extern errcode_t ext2fs_update_bb_inode(ext2_filsys fs, 551 ext2_badblocks_list bb_list); 552 553/* bitmaps.c */ 554extern errcode_t ext2fs_write_inode_bitmap(ext2_filsys fs); 555extern errcode_t ext2fs_write_block_bitmap (ext2_filsys fs); 556extern errcode_t ext2fs_read_inode_bitmap (ext2_filsys fs); 557extern errcode_t ext2fs_read_block_bitmap(ext2_filsys fs); 558extern errcode_t ext2fs_allocate_generic_bitmap(__u32 start, 559 __u32 end, 560 __u32 real_end, 561 const char *descr, 562 ext2fs_generic_bitmap *ret); 563extern errcode_t ext2fs_allocate_block_bitmap(ext2_filsys fs, 564 const char *descr, 565 ext2fs_block_bitmap *ret); 566extern errcode_t ext2fs_allocate_inode_bitmap(ext2_filsys fs, 567 const char *descr, 568 ext2fs_inode_bitmap *ret); 569extern errcode_t ext2fs_fudge_inode_bitmap_end(ext2fs_inode_bitmap bitmap, 570 ext2_ino_t end, ext2_ino_t *oend); 571extern errcode_t ext2fs_fudge_block_bitmap_end(ext2fs_block_bitmap bitmap, 572 blk_t end, blk_t *oend); 573extern void ext2fs_clear_inode_bitmap(ext2fs_inode_bitmap bitmap); 574extern void ext2fs_clear_block_bitmap(ext2fs_block_bitmap bitmap); 575extern errcode_t ext2fs_read_bitmaps(ext2_filsys fs); 576extern errcode_t ext2fs_write_bitmaps(ext2_filsys fs); 577 578/* block.c */ 579extern errcode_t ext2fs_block_iterate(ext2_filsys fs, 580 ext2_ino_t ino, 581 int flags, 582 char *block_buf, 583 int (*func)(ext2_filsys fs, 584 blk_t *blocknr, 585 int blockcnt, 586 void *priv_data), 587 void *priv_data); 588errcode_t ext2fs_block_iterate2(ext2_filsys fs, 589 ext2_ino_t ino, 590 int flags, 591 char *block_buf, 592 int (*func)(ext2_filsys fs, 593 blk_t *blocknr, 594 e2_blkcnt_t blockcnt, 595 blk_t ref_blk, 596 int ref_offset, 597 void *priv_data), 598 void *priv_data); 599 600/* bmap.c */ 601extern errcode_t ext2fs_bmap(ext2_filsys fs, ext2_ino_t ino, 602 struct ext2_inode *inode, 603 char *block_buf, int bmap_flags, 604 blk_t block, blk_t *phys_blk); 605 606 607#if 0 608/* bmove.c */ 609extern errcode_t ext2fs_move_blocks(ext2_filsys fs, 610 ext2fs_block_bitmap reserve, 611 ext2fs_block_bitmap alloc_map, 612 int flags); 613#endif 614 615/* check_desc.c */ 616extern errcode_t ext2fs_check_desc(ext2_filsys fs); 617 618/* closefs.c */ 619extern errcode_t ext2fs_close(ext2_filsys fs); 620extern errcode_t ext2fs_flush(ext2_filsys fs); 621extern int ext2fs_bg_has_super(ext2_filsys fs, int group_block); 622extern int ext2fs_super_and_bgd_loc(ext2_filsys fs, 623 dgrp_t group, 624 blk_t *ret_super_blk, 625 blk_t *ret_old_desc_blk, 626 blk_t *ret_new_desc_blk, 627 int *ret_meta_bg); 628extern void ext2fs_update_dynamic_rev(ext2_filsys fs); 629 630/* cmp_bitmaps.c */ 631extern errcode_t ext2fs_compare_block_bitmap(ext2fs_block_bitmap bm1, 632 ext2fs_block_bitmap bm2); 633extern errcode_t ext2fs_compare_inode_bitmap(ext2fs_inode_bitmap bm1, 634 ext2fs_inode_bitmap bm2); 635 636/* dblist.c */ 637 638extern errcode_t ext2fs_get_num_dirs(ext2_filsys fs, ext2_ino_t *ret_num_dirs); 639extern errcode_t ext2fs_init_dblist(ext2_filsys fs, ext2_dblist *ret_dblist); 640extern errcode_t ext2fs_add_dir_block(ext2_dblist dblist, ext2_ino_t ino, 641 blk_t blk, int blockcnt); 642extern void ext2fs_dblist_sort(ext2_dblist dblist, 643 EXT2_QSORT_TYPE (*sortfunc)(const void *, 644 const void *)); 645extern errcode_t ext2fs_dblist_iterate(ext2_dblist dblist, 646 int (*func)(ext2_filsys fs, struct ext2_db_entry *db_info, 647 void *priv_data), 648 void *priv_data); 649extern errcode_t ext2fs_set_dir_block(ext2_dblist dblist, ext2_ino_t ino, 650 blk_t blk, int blockcnt); 651extern errcode_t ext2fs_copy_dblist(ext2_dblist src, 652 ext2_dblist *dest); 653extern int ext2fs_dblist_count(ext2_dblist dblist); 654 655/* dblist_dir.c */ 656extern errcode_t 657 ext2fs_dblist_dir_iterate(ext2_dblist dblist, 658 int flags, 659 char *block_buf, 660 int (*func)(ext2_ino_t dir, 661 int entry, 662 struct ext2_dir_entry *dirent, 663 int offset, 664 int blocksize, 665 char *buf, 666 void *priv_data), 667 void *priv_data); 668 669/* dirblock.c */ 670extern errcode_t ext2fs_read_dir_block(ext2_filsys fs, blk_t block, 671 void *buf); 672extern errcode_t ext2fs_read_dir_block2(ext2_filsys fs, blk_t block, 673 void *buf, int flags); 674extern errcode_t ext2fs_write_dir_block(ext2_filsys fs, blk_t block, 675 void *buf); 676extern errcode_t ext2fs_write_dir_block2(ext2_filsys fs, blk_t block, 677 void *buf, int flags); 678 679/* dirhash.c */ 680extern errcode_t ext2fs_dirhash(int version, const char *name, int len, 681 const __u32 *seed, 682 ext2_dirhash_t *ret_hash, 683 ext2_dirhash_t *ret_minor_hash); 684 685 686/* dir_iterate.c */ 687extern errcode_t ext2fs_dir_iterate(ext2_filsys fs, 688 ext2_ino_t dir, 689 int flags, 690 char *block_buf, 691 int (*func)(struct ext2_dir_entry *dirent, 692 int offset, 693 int blocksize, 694 char *buf, 695 void *priv_data), 696 void *priv_data); 697extern errcode_t ext2fs_dir_iterate2(ext2_filsys fs, 698 ext2_ino_t dir, 699 int flags, 700 char *block_buf, 701 int (*func)(ext2_ino_t dir, 702 int entry, 703 struct ext2_dir_entry *dirent, 704 int offset, 705 int blocksize, 706 char *buf, 707 void *priv_data), 708 void *priv_data); 709 710/* dupfs.c */ 711extern errcode_t ext2fs_dup_handle(ext2_filsys src, ext2_filsys *dest); 712 713/* expanddir.c */ 714extern errcode_t ext2fs_expand_dir(ext2_filsys fs, ext2_ino_t dir); 715 716/* ext_attr.c */ 717extern errcode_t ext2fs_read_ext_attr(ext2_filsys fs, blk_t block, void *buf); 718extern errcode_t ext2fs_write_ext_attr(ext2_filsys fs, blk_t block, 719 void *buf); 720extern errcode_t ext2fs_adjust_ea_refcount(ext2_filsys fs, blk_t blk, 721 char *block_buf, 722 int adjust, __u32 *newcount); 723 724/* fileio.c */ 725extern errcode_t ext2fs_file_open2(ext2_filsys fs, ext2_ino_t ino, 726 struct ext2_inode *inode, 727 int flags, ext2_file_t *ret); 728extern errcode_t ext2fs_file_open(ext2_filsys fs, ext2_ino_t ino, 729 int flags, ext2_file_t *ret); 730extern ext2_filsys ext2fs_file_get_fs(ext2_file_t file); 731extern errcode_t ext2fs_file_close(ext2_file_t file); 732extern errcode_t ext2fs_file_flush(ext2_file_t file); 733extern errcode_t ext2fs_file_read(ext2_file_t file, void *buf, 734 unsigned int wanted, unsigned int *got); 735extern errcode_t ext2fs_file_write(ext2_file_t file, const void *buf, 736 unsigned int nbytes, unsigned int *written); 737extern errcode_t ext2fs_file_llseek(ext2_file_t file, __u64 offset, 738 int whence, __u64 *ret_pos); 739extern errcode_t ext2fs_file_lseek(ext2_file_t file, ext2_off_t offset, 740 int whence, ext2_off_t *ret_pos); 741errcode_t ext2fs_file_get_lsize(ext2_file_t file, __u64 *ret_size); 742extern ext2_off_t ext2fs_file_get_size(ext2_file_t file); 743extern errcode_t ext2fs_file_set_size(ext2_file_t file, ext2_off_t size); 744 745/* finddev.c */ 746extern char *ext2fs_find_block_device(dev_t device); 747 748/* flushb.c */ 749extern errcode_t ext2fs_sync_device(int fd, int flushb); 750 751/* freefs.c */ 752extern void ext2fs_free(ext2_filsys fs); 753extern void ext2fs_free_generic_bitmap(ext2fs_inode_bitmap bitmap); 754extern void ext2fs_free_block_bitmap(ext2fs_block_bitmap bitmap); 755extern void ext2fs_free_inode_bitmap(ext2fs_inode_bitmap bitmap); 756extern void ext2fs_free_dblist(ext2_dblist dblist); 757extern void ext2fs_badblocks_list_free(ext2_badblocks_list bb); 758extern void ext2fs_u32_list_free(ext2_u32_list bb); 759 760/* getsize.c */ 761extern errcode_t ext2fs_get_device_size(const char *file, int blocksize, 762 blk_t *retblocks); 763 764/* getsectsize.c */ 765errcode_t ext2fs_get_device_sectsize(const char *file, int *sectsize); 766 767/* imager.c */ 768extern errcode_t ext2fs_image_inode_write(ext2_filsys fs, int fd, int flags); 769extern errcode_t ext2fs_image_inode_read(ext2_filsys fs, int fd, int flags); 770extern errcode_t ext2fs_image_super_write(ext2_filsys fs, int fd, int flags); 771extern errcode_t ext2fs_image_super_read(ext2_filsys fs, int fd, int flags); 772extern errcode_t ext2fs_image_bitmap_write(ext2_filsys fs, int fd, int flags); 773extern errcode_t ext2fs_image_bitmap_read(ext2_filsys fs, int fd, int flags); 774 775/* ind_block.c */ 776errcode_t ext2fs_read_ind_block(ext2_filsys fs, blk_t blk, void *buf); 777errcode_t ext2fs_write_ind_block(ext2_filsys fs, blk_t blk, void *buf); 778 779/* initialize.c */ 780extern errcode_t ext2fs_initialize(const char *name, int flags, 781 struct ext2_super_block *param, 782 io_manager manager, ext2_filsys *ret_fs); 783 784/* icount.c */ 785extern void ext2fs_free_icount(ext2_icount_t icount); 786extern errcode_t ext2fs_create_icount_tdb(ext2_filsys fs, char *tdb_dir, 787 int flags, ext2_icount_t *ret); 788extern errcode_t ext2fs_create_icount2(ext2_filsys fs, int flags, 789 unsigned int size, 790 ext2_icount_t hint, ext2_icount_t *ret); 791extern errcode_t ext2fs_create_icount(ext2_filsys fs, int flags, 792 unsigned int size, 793 ext2_icount_t *ret); 794extern errcode_t ext2fs_icount_fetch(ext2_icount_t icount, ext2_ino_t ino, 795 __u16 *ret); 796extern errcode_t ext2fs_icount_increment(ext2_icount_t icount, ext2_ino_t ino, 797 __u16 *ret); 798extern errcode_t ext2fs_icount_decrement(ext2_icount_t icount, ext2_ino_t ino, 799 __u16 *ret); 800extern errcode_t ext2fs_icount_store(ext2_icount_t icount, ext2_ino_t ino, 801 __u16 count); 802extern ext2_ino_t ext2fs_get_icount_size(ext2_icount_t icount); 803errcode_t ext2fs_icount_validate(ext2_icount_t icount, FILE *); 804 805/* inode.c */ 806extern errcode_t ext2fs_flush_icache(ext2_filsys fs); 807extern errcode_t ext2fs_get_next_inode_full(ext2_inode_scan scan, 808 ext2_ino_t *ino, 809 struct ext2_inode *inode, 810 int bufsize); 811extern errcode_t ext2fs_open_inode_scan(ext2_filsys fs, int buffer_blocks, 812 ext2_inode_scan *ret_scan); 813extern void ext2fs_close_inode_scan(ext2_inode_scan scan); 814extern errcode_t ext2fs_get_next_inode(ext2_inode_scan scan, ext2_ino_t *ino, 815 struct ext2_inode *inode); 816extern errcode_t ext2fs_inode_scan_goto_blockgroup(ext2_inode_scan scan, 817 int group); 818extern void ext2fs_set_inode_callback 819 (ext2_inode_scan scan, 820 errcode_t (*done_group)(ext2_filsys fs, 821 ext2_inode_scan scan, 822 dgrp_t group, 823 void * priv_data), 824 void *done_group_data); 825extern int ext2fs_inode_scan_flags(ext2_inode_scan scan, int set_flags, 826 int clear_flags); 827extern errcode_t ext2fs_read_inode_full(ext2_filsys fs, ext2_ino_t ino, 828 struct ext2_inode * inode, 829 int bufsize); 830extern errcode_t ext2fs_read_inode (ext2_filsys fs, ext2_ino_t ino, 831 struct ext2_inode * inode); 832extern errcode_t ext2fs_write_inode_full(ext2_filsys fs, ext2_ino_t ino, 833 struct ext2_inode * inode, 834 int bufsize); 835extern errcode_t ext2fs_write_inode(ext2_filsys fs, ext2_ino_t ino, 836 struct ext2_inode * inode); 837extern errcode_t ext2fs_write_new_inode(ext2_filsys fs, ext2_ino_t ino, 838 struct ext2_inode * inode); 839extern errcode_t ext2fs_get_blocks(ext2_filsys fs, ext2_ino_t ino, blk_t *blocks); 840extern errcode_t ext2fs_check_directory(ext2_filsys fs, ext2_ino_t ino); 841 842/* inode_io.c */ 843extern io_manager inode_io_manager; 844extern errcode_t ext2fs_inode_io_intern(ext2_filsys fs, ext2_ino_t ino, 845 char **name); 846extern errcode_t ext2fs_inode_io_intern2(ext2_filsys fs, ext2_ino_t ino, 847 struct ext2_inode *inode, 848 char **name); 849 850/* ismounted.c */ 851extern errcode_t ext2fs_check_if_mounted(const char *file, int *mount_flags); 852extern errcode_t ext2fs_check_mount_point(const char *device, int *mount_flags, 853 char *mtpt, int mtlen); 854 855/* namei.c */ 856extern errcode_t ext2fs_lookup(ext2_filsys fs, ext2_ino_t dir, const char *name, 857 int namelen, char *buf, ext2_ino_t *inode); 858extern errcode_t ext2fs_namei(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd, 859 const char *name, ext2_ino_t *inode); 860errcode_t ext2fs_namei_follow(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd, 861 const char *name, ext2_ino_t *inode); 862extern errcode_t ext2fs_follow_link(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd, 863 ext2_ino_t inode, ext2_ino_t *res_inode); 864 865/* native.c */ 866int ext2fs_native_flag(void); 867 868/* newdir.c */ 869extern errcode_t ext2fs_new_dir_block(ext2_filsys fs, ext2_ino_t dir_ino, 870 ext2_ino_t parent_ino, char **block); 871 872/* mkdir.c */ 873extern errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum, 874 const char *name); 875 876/* mkjournal.c */ 877extern errcode_t ext2fs_create_journal_superblock(ext2_filsys fs, 878 __u32 size, int flags, 879 char **ret_jsb); 880extern errcode_t ext2fs_add_journal_device(ext2_filsys fs, 881 ext2_filsys journal_dev); 882extern errcode_t ext2fs_add_journal_inode(ext2_filsys fs, blk_t size, 883 int flags); 884extern int ext2fs_default_journal_size(__u64 blocks); 885 886/* openfs.c */ 887extern errcode_t ext2fs_open(const char *name, int flags, int superblock, 888 unsigned int block_size, io_manager manager, 889 ext2_filsys *ret_fs); 890extern errcode_t ext2fs_open2(const char *name, const char *io_options, 891 int flags, int superblock, 892 unsigned int block_size, io_manager manager, 893 ext2_filsys *ret_fs); 894extern blk_t ext2fs_descriptor_block_loc(ext2_filsys fs, blk_t group_block, 895 dgrp_t i); 896errcode_t ext2fs_get_data_io(ext2_filsys fs, io_channel *old_io); 897errcode_t ext2fs_set_data_io(ext2_filsys fs, io_channel new_io); 898errcode_t ext2fs_rewrite_to_io(ext2_filsys fs, io_channel new_io); 899 900/* get_pathname.c */ 901extern errcode_t ext2fs_get_pathname(ext2_filsys fs, ext2_ino_t dir, ext2_ino_t ino, 902 char **name); 903 904/* link.c */ 905errcode_t ext2fs_link(ext2_filsys fs, ext2_ino_t dir, const char *name, 906 ext2_ino_t ino, int flags); 907errcode_t ext2fs_unlink(ext2_filsys fs, ext2_ino_t dir, const char *name, 908 ext2_ino_t ino, int flags); 909 910/* read_bb.c */ 911extern errcode_t ext2fs_read_bb_inode(ext2_filsys fs, 912 ext2_badblocks_list *bb_list); 913 914/* read_bb_file.c */ 915extern errcode_t ext2fs_read_bb_FILE2(ext2_filsys fs, FILE *f, 916 ext2_badblocks_list *bb_list, 917 void *priv_data, 918 void (*invalid)(ext2_filsys fs, 919 blk_t blk, 920 char *badstr, 921 void *priv_data)); 922extern errcode_t ext2fs_read_bb_FILE(ext2_filsys fs, FILE *f, 923 ext2_badblocks_list *bb_list, 924 void (*invalid)(ext2_filsys fs, 925 blk_t blk)); 926 927/* res_gdt.c */ 928extern errcode_t ext2fs_create_resize_inode(ext2_filsys fs); 929 930/* rs_bitmap.c */ 931extern errcode_t ext2fs_resize_generic_bitmap(__u32 new_end, 932 __u32 new_real_end, 933 ext2fs_generic_bitmap bmap); 934extern errcode_t ext2fs_resize_inode_bitmap(__u32 new_end, __u32 new_real_end, 935 ext2fs_inode_bitmap bmap); 936extern errcode_t ext2fs_resize_block_bitmap(__u32 new_end, __u32 new_real_end, 937 ext2fs_block_bitmap bmap); 938extern errcode_t ext2fs_copy_bitmap(ext2fs_generic_bitmap src, 939 ext2fs_generic_bitmap *dest); 940 941/* swapfs.c */ 942extern void ext2fs_swap_ext_attr(char *to, char *from, int bufsize, 943 int has_header); 944extern void ext2fs_swap_super(struct ext2_super_block * super); 945extern void ext2fs_swap_group_desc(struct ext2_group_desc *gdp); 946extern void ext2fs_swap_inode_full(ext2_filsys fs, struct ext2_inode_large *t, 947 struct ext2_inode_large *f, int hostorder, 948 int bufsize); 949extern void ext2fs_swap_inode(ext2_filsys fs,struct ext2_inode *t, 950 struct ext2_inode *f, int hostorder); 951 952/* valid_blk.c */ 953extern int ext2fs_inode_has_valid_blocks(struct ext2_inode *inode); 954 955/* version.c */ 956extern int ext2fs_parse_version_string(const char *ver_string); 957extern int ext2fs_get_library_version(const char **ver_string, 958 const char **date_string); 959 960/* write_bb_file.c */ 961extern errcode_t ext2fs_write_bb_FILE(ext2_badblocks_list bb_list, 962 unsigned int flags, 963 FILE *f); 964 965 966/* inline functions */ 967extern errcode_t ext2fs_get_mem(unsigned long size, void *ptr); 968extern errcode_t ext2fs_get_array(unsigned long count, unsigned long size, void *ptr); 969extern errcode_t ext2fs_free_mem(void *ptr); 970extern errcode_t ext2fs_resize_mem(unsigned long old_size, 971 unsigned long size, void *ptr); 972extern void ext2fs_mark_super_dirty(ext2_filsys fs); 973extern void ext2fs_mark_changed(ext2_filsys fs); 974extern int ext2fs_test_changed(ext2_filsys fs); 975extern void ext2fs_mark_valid(ext2_filsys fs); 976extern void ext2fs_unmark_valid(ext2_filsys fs); 977extern int ext2fs_test_valid(ext2_filsys fs); 978extern void ext2fs_mark_ib_dirty(ext2_filsys fs); 979extern void ext2fs_mark_bb_dirty(ext2_filsys fs); 980extern int ext2fs_test_ib_dirty(ext2_filsys fs); 981extern int ext2fs_test_bb_dirty(ext2_filsys fs); 982extern int ext2fs_group_of_blk(ext2_filsys fs, blk_t blk); 983extern int ext2fs_group_of_ino(ext2_filsys fs, ext2_ino_t ino); 984extern blk_t ext2fs_group_first_block(ext2_filsys fs, dgrp_t group); 985extern blk_t ext2fs_group_last_block(ext2_filsys fs, dgrp_t group); 986extern blk_t ext2fs_inode_data_blocks(ext2_filsys fs, 987 struct ext2_inode *inode); 988extern unsigned int ext2fs_div_ceil(unsigned int a, unsigned int b); 989 990/* 991 * The actual inlined functions definitions themselves... 992 * 993 * If NO_INLINE_FUNCS is defined, then we won't try to do inline 994 * functions at all! 995 */ 996#if (defined(INCLUDE_INLINE_FUNCS) || !defined(NO_INLINE_FUNCS)) 997#ifdef INCLUDE_INLINE_FUNCS 998#define _INLINE_ extern 999#else 1000#ifdef __GNUC__ 1001#define _INLINE_ extern __inline__ 1002#else /* For Watcom C */ 1003#define _INLINE_ extern inline 1004#endif 1005#endif 1006 1007#ifndef EXT2_CUSTOM_MEMORY_ROUTINES 1008#include <string.h> 1009/* 1010 * Allocate memory 1011 */ 1012_INLINE_ errcode_t ext2fs_get_mem(unsigned long size, void *ptr) 1013{ 1014 void *pp; 1015 1016 pp = malloc(size); 1017 if (!pp) 1018 return EXT2_ET_NO_MEMORY; 1019 memcpy(ptr, &pp, sizeof (pp)); 1020 return 0; 1021} 1022 1023_INLINE_ errcode_t ext2fs_get_array(unsigned long count, unsigned long size, void *ptr) 1024{ 1025 if (count && (-1UL)/count<size) 1026 return EXT2_ET_NO_MEMORY; //maybe define EXT2_ET_OVERFLOW ? 1027 return ext2fs_get_mem(count*size, ptr); 1028} 1029 1030/* 1031 * Free memory 1032 */ 1033_INLINE_ errcode_t ext2fs_free_mem(void *ptr) 1034{ 1035 void *p; 1036 1037 memcpy(&p, ptr, sizeof(p)); 1038 free(p); 1039 p = 0; 1040 memcpy(ptr, &p, sizeof(p)); 1041 return 0; 1042} 1043 1044/* 1045 * Resize memory 1046 */ 1047_INLINE_ errcode_t ext2fs_resize_mem(unsigned long EXT2FS_ATTR((unused)) old_size, 1048 unsigned long size, void *ptr) 1049{ 1050 void *p; 1051 1052 /* Use "memcpy" for pointer assignments here to avoid problems 1053 * with C99 strict type aliasing rules. */ 1054 memcpy(&p, ptr, sizeof(p)); 1055 p = realloc(p, size); 1056 if (!p) 1057 return EXT2_ET_NO_MEMORY; 1058 memcpy(ptr, &p, sizeof(p)); 1059 return 0; 1060} 1061#endif /* Custom memory routines */ 1062 1063/* 1064 * Mark a filesystem superblock as dirty 1065 */ 1066_INLINE_ void ext2fs_mark_super_dirty(ext2_filsys fs) 1067{ 1068 fs->flags |= EXT2_FLAG_DIRTY | EXT2_FLAG_CHANGED; 1069} 1070 1071/* 1072 * Mark a filesystem as changed 1073 */ 1074_INLINE_ void ext2fs_mark_changed(ext2_filsys fs) 1075{ 1076 fs->flags |= EXT2_FLAG_CHANGED; 1077} 1078 1079/* 1080 * Check to see if a filesystem has changed 1081 */ 1082_INLINE_ int ext2fs_test_changed(ext2_filsys fs) 1083{ 1084 return (fs->flags & EXT2_FLAG_CHANGED); 1085} 1086 1087/* 1088 * Mark a filesystem as valid 1089 */ 1090_INLINE_ void ext2fs_mark_valid(ext2_filsys fs) 1091{ 1092 fs->flags |= EXT2_FLAG_VALID; 1093} 1094 1095/* 1096 * Mark a filesystem as NOT valid 1097 */ 1098_INLINE_ void ext2fs_unmark_valid(ext2_filsys fs) 1099{ 1100 fs->flags &= ~EXT2_FLAG_VALID; 1101} 1102 1103/* 1104 * Check to see if a filesystem is valid 1105 */ 1106_INLINE_ int ext2fs_test_valid(ext2_filsys fs) 1107{ 1108 return (fs->flags & EXT2_FLAG_VALID); 1109} 1110 1111/* 1112 * Mark the inode bitmap as dirty 1113 */ 1114_INLINE_ void ext2fs_mark_ib_dirty(ext2_filsys fs) 1115{ 1116 fs->flags |= EXT2_FLAG_IB_DIRTY | EXT2_FLAG_CHANGED; 1117} 1118 1119/* 1120 * Mark the block bitmap as dirty 1121 */ 1122_INLINE_ void ext2fs_mark_bb_dirty(ext2_filsys fs) 1123{ 1124 fs->flags |= EXT2_FLAG_BB_DIRTY | EXT2_FLAG_CHANGED; 1125} 1126 1127/* 1128 * Check to see if a filesystem's inode bitmap is dirty 1129 */ 1130_INLINE_ int ext2fs_test_ib_dirty(ext2_filsys fs) 1131{ 1132 return (fs->flags & EXT2_FLAG_IB_DIRTY); 1133} 1134 1135/* 1136 * Check to see if a filesystem's block bitmap is dirty 1137 */ 1138_INLINE_ int ext2fs_test_bb_dirty(ext2_filsys fs) 1139{ 1140 return (fs->flags & EXT2_FLAG_BB_DIRTY); 1141} 1142 1143/* 1144 * Return the group # of a block 1145 */ 1146_INLINE_ int ext2fs_group_of_blk(ext2_filsys fs, blk_t blk) 1147{ 1148 return (blk - fs->super->s_first_data_block) / 1149 fs->super->s_blocks_per_group; 1150} 1151 1152/* 1153 * Return the group # of an inode number 1154 */ 1155_INLINE_ int ext2fs_group_of_ino(ext2_filsys fs, ext2_ino_t ino) 1156{ 1157 return (ino - 1) / fs->super->s_inodes_per_group; 1158} 1159 1160/* 1161 * Return the first block (inclusive) in a group 1162 */ 1163_INLINE_ blk_t ext2fs_group_first_block(ext2_filsys fs, dgrp_t group) 1164{ 1165 return fs->super->s_first_data_block + 1166 (group * fs->super->s_blocks_per_group); 1167} 1168 1169/* 1170 * Return the last block (inclusive) in a group 1171 */ 1172_INLINE_ blk_t ext2fs_group_last_block(ext2_filsys fs, dgrp_t group) 1173{ 1174 return (group == fs->group_desc_count - 1 ? 1175 fs->super->s_blocks_count - 1 : 1176 ext2fs_group_first_block(fs, group) + 1177 (fs->super->s_blocks_per_group - 1)); 1178} 1179 1180_INLINE_ blk_t ext2fs_inode_data_blocks(ext2_filsys fs, 1181 struct ext2_inode *inode) 1182{ 1183 return inode->i_blocks - 1184 (inode->i_file_acl ? fs->blocksize >> 9 : 0); 1185} 1186 1187/* 1188 * This is an efficient, overflow safe way of calculating ceil((1.0 * a) / b) 1189 */ 1190_INLINE_ unsigned int ext2fs_div_ceil(unsigned int a, unsigned int b) 1191{ 1192 if (!a) 1193 return 0; 1194 return ((a - 1) / b) + 1; 1195} 1196#undef _INLINE_ 1197#endif 1198 1199#ifdef __cplusplus 1200} 1201#endif 1202 1203#endif /* _EXT2FS_EXT2FS_H */ 1204