ext2fs.h revision 43ec8734f2ecd0a345e831f45fd3dfb077426811
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 __cplusplus 16extern "C" { 17#endif 18 19/* 20 * Non-GNU C compilers won't necessarily understand inline 21 */ 22#if (!defined(__GNUC__) && !defined(__WATCOMC__)) 23#define NO_INLINE_FUNCS 24#endif 25 26/* 27 * Where the master copy of the superblock is located, and how big 28 * superblocks are supposed to be. We define SUPERBLOCK_SIZE because 29 * the size of the superblock structure is not necessarily trustworthy 30 * (some versions have the padding set up so that the superblock is 31 * 1032 bytes long). 32 */ 33#define SUPERBLOCK_OFFSET 1024 34#define SUPERBLOCK_SIZE 1024 35 36/* 37 * The last ext2fs revision level that this version of the library is 38 * able to support. 39 */ 40#define EXT2_LIB_CURRENT_REV EXT2_DYNAMIC_REV 41 42#ifdef HAVE_SYS_TYPES_H 43#include <sys/types.h> 44#endif 45 46#include <stdlib.h> 47 48#if EXT2_FLAT_INCLUDES 49#include "e2_types.h" 50#else 51#include <asm/types.h> 52#if !defined(__GNUC__) || defined(__STRICT_ANSI__) /* asm/types.h already defines __s64 and __u64 otherwise */ 53#if SIZEOF_LONG == 8 54typedef __signed__ long __s64; 55typedef unsigned long __u64; 56#elif SIZEOF_LONG_LONG == 8 || \ 57 defined(__GNUC__) && (((~0UL) == 0xffffffff) || defined(__i386__)) 58typedef __signed__ long long __s64; 59typedef unsigned long long __u64; 60#endif /* SIZEOF_LONG == 8 */ 61#endif 62#endif /* EXT2_FLAT_INCLUDES */ 63 64typedef __u32 blk_t; 65typedef __u32 dgrp_t; 66typedef __u32 ext2_off_t; 67typedef __s64 e2_blkcnt_t; 68 69#if EXT2_FLAT_INCLUDES 70#include "com_err.h" 71#include "ext2_io.h" 72#include "ext2_err.h" 73#else 74#include "et/com_err.h" 75#include "ext2fs/ext2_io.h" 76#include "ext2fs/ext2_err.h" 77#endif 78 79/* 80 * Portability help for Microsoft Visual C++ 81 */ 82#ifdef _MSC_VER 83#define EXT2_QSORT_TYPE int __cdecl 84#else 85#define EXT2_QSORT_TYPE int 86#endif 87 88typedef struct struct_ext2_filsys *ext2_filsys; 89 90struct ext2fs_struct_generic_bitmap { 91 errcode_t magic; 92 ext2_filsys fs; 93 __u32 start, end; 94 __u32 real_end; 95 char * description; 96 char * bitmap; 97 errcode_t base_error_code; 98 __u32 reserved[7]; 99}; 100 101#define EXT2FS_MARK_ERROR 0 102#define EXT2FS_UNMARK_ERROR 1 103#define EXT2FS_TEST_ERROR 2 104 105typedef struct ext2fs_struct_generic_bitmap *ext2fs_generic_bitmap; 106typedef struct ext2fs_struct_generic_bitmap *ext2fs_inode_bitmap; 107typedef struct ext2fs_struct_generic_bitmap *ext2fs_block_bitmap; 108 109#ifdef EXT2_DYNAMIC_REV 110#define EXT2_FIRST_INODE(s) EXT2_FIRST_INO(s) 111#else 112#define EXT2_FIRST_INODE(s) EXT2_FIRST_INO 113#define EXT2_INODE_SIZE(s) sizeof(struct ext2_inode) 114#endif 115 116/* 117 * badblocks list definitions 118 */ 119 120typedef struct ext2_struct_badblocks_list *ext2_badblocks_list; 121typedef struct ext2_struct_badblocks_iterate *ext2_badblocks_iterate; 122 123/* old */ 124typedef struct ext2_struct_badblocks_list *badblocks_list; 125typedef struct ext2_struct_badblocks_iterate *badblocks_iterate; 126 127#define BADBLOCKS_FLAG_DIRTY 1 128 129/* 130 * ext2_dblist structure and abstractions (see dblist.c) 131 */ 132struct ext2_db_entry { 133 ino_t ino; 134 blk_t blk; 135 int blockcnt; 136}; 137 138typedef struct ext2_struct_dblist *ext2_dblist; 139 140#define DBLIST_ABORT 1 141 142/* 143 * ext2_fileio definitions 144 */ 145 146#define EXT2_FILE_WRITE 0x0001 147#define EXT2_FILE_CREATE 0x0002 148 149#define EXT2_FILE_MASK 0x00FF 150 151#define EXT2_FILE_BUF_DIRTY 0x4000 152#define EXT2_FILE_BUF_VALID 0x2000 153 154typedef struct ext2_file *ext2_file_t; 155 156#define EXT2_SEEK_SET 0 157#define EXT2_SEEK_CUR 1 158#define EXT2_SEEK_END 2 159 160/* 161 * Flags for the ext2_filsys structure 162 */ 163#define EXT2_FLAG_RW 0x01 164#define EXT2_FLAG_CHANGED 0x02 165#define EXT2_FLAG_DIRTY 0x04 166#define EXT2_FLAG_VALID 0x08 167#define EXT2_FLAG_IB_DIRTY 0x10 168#define EXT2_FLAG_BB_DIRTY 0x20 169#define EXT2_FLAG_SWAP_BYTES 0x40 170#define EXT2_FLAG_SWAP_BYTES_READ 0x80 171#define EXT2_FLAG_SWAP_BYTES_WRITE 0x100 172#define EXT2_FLAG_MASTER_SB_ONLY 0x200 173#define EXT2_FLAG_FORCE 0x400 174#define EXT2_FLAG_SUPER_ONLY 0x800 175 176/* 177 * Special flag in the ext2 inode i_flag field that means that this is 178 * a new inode. (So that ext2_write_inode() can clear extra fields.) 179 */ 180#define EXT2_NEW_INODE_FL 0x80000000 181 182/* 183 * Flags for mkjournal 184 * 185 * EXT2_MKJOURNAL_V1_SUPER Make a (deprecated) V1 journal superblock 186 */ 187#define EXT2_MKJOURNAL_V1_SUPER 0x0000001 188 189struct struct_ext2_filsys { 190 errcode_t magic; 191 io_channel io; 192 int flags; 193 char * device_name; 194 struct ext2_super_block * super; 195 int blocksize; 196 int fragsize; 197 dgrp_t group_desc_count; 198 unsigned long desc_blocks; 199 struct ext2_group_desc * group_desc; 200 int inode_blocks_per_group; 201 ext2fs_inode_bitmap inode_map; 202 ext2fs_block_bitmap block_map; 203 errcode_t (*get_blocks)(ext2_filsys fs, ino_t ino, blk_t *blocks); 204 errcode_t (*check_directory)(ext2_filsys fs, ino_t ino); 205 errcode_t (*write_bitmaps)(ext2_filsys fs); 206 errcode_t (*read_inode)(ext2_filsys fs, ino_t ino, 207 struct ext2_inode *inode); 208 errcode_t (*write_inode)(ext2_filsys fs, ino_t ino, 209 struct ext2_inode *inode); 210 badblocks_list badblocks; 211 ext2_dblist dblist; 212 __u32 stride; /* for mke2fs */ 213 struct ext2_super_block * orig_super; 214 /* 215 * Reserved for future expansion 216 */ 217 __u32 reserved[10]; 218 219 /* 220 * Reserved for the use of the calling application. 221 */ 222 void * priv_data; 223 224 /* 225 * Inode cache 226 */ 227 struct ext2_inode_cache *icache; 228}; 229 230#if EXT2_FLAT_INCLUDES 231#include "e2_bitops.h" 232#else 233#include "ext2fs/bitops.h" 234#endif 235 236/* 237 * Return flags for the block iterator functions 238 */ 239#define BLOCK_CHANGED 1 240#define BLOCK_ABORT 2 241#define BLOCK_ERROR 4 242 243/* 244 * Block interate flags 245 * 246 * BLOCK_FLAG_APPEND, or BLOCK_FLAG_HOLE, indicates that the interator 247 * function should be called on blocks where the block number is zero. 248 * This is used by ext2fs_expand_dir() to be able to add a new block 249 * to an inode. It can also be used for programs that want to be able 250 * to deal with files that contain "holes". 251 * 252 * BLOCK_FLAG_TRAVERSE indicates that the iterator function for the 253 * indirect, doubly indirect, etc. blocks should be called after all 254 * of the blocks containined in the indirect blocks are processed. 255 * This is useful if you are going to be deallocating blocks from an 256 * inode. 257 * 258 * BLOCK_FLAG_DATA_ONLY indicates that the iterator function should be 259 * called for data blocks only. 260 * 261 * BLOCK_FLAG_NO_LARGE is for internal use only. It informs 262 * ext2fs_block_iterate2 that large files won't be accepted. 263 */ 264#define BLOCK_FLAG_APPEND 1 265#define BLOCK_FLAG_HOLE 1 266#define BLOCK_FLAG_DEPTH_TRAVERSE 2 267#define BLOCK_FLAG_DATA_ONLY 4 268 269#define BLOCK_FLAG_NO_LARGE 0x1000 270 271/* 272 * Magic "block count" return values for the block iterator function. 273 */ 274#define BLOCK_COUNT_IND (-1) 275#define BLOCK_COUNT_DIND (-2) 276#define BLOCK_COUNT_TIND (-3) 277#define BLOCK_COUNT_TRANSLATOR (-4) 278 279#if 0 280/* 281 * Flags for ext2fs_move_blocks 282 */ 283#define EXT2_BMOVE_GET_DBLIST 0x0001 284#define EXT2_BMOVE_DEBUG 0x0002 285#endif 286 287/* 288 * Return flags for the directory iterator functions 289 */ 290#define DIRENT_CHANGED 1 291#define DIRENT_ABORT 2 292#define DIRENT_ERROR 3 293 294/* 295 * Directory iterator flags 296 */ 297 298#define DIRENT_FLAG_INCLUDE_EMPTY 1 299 300 301#define DIRENT_DOT_FILE 1 302#define DIRENT_DOT_DOT_FILE 2 303#define DIRENT_OTHER_FILE 3 304 305/* 306 * Inode scan definitions 307 */ 308typedef struct ext2_struct_inode_scan *ext2_inode_scan; 309 310/* 311 * ext2fs_scan flags 312 */ 313#define EXT2_SF_CHK_BADBLOCKS 0x0001 314#define EXT2_SF_BAD_INODE_BLK 0x0002 315#define EXT2_SF_BAD_EXTRA_BYTES 0x0004 316#define EXT2_SF_SKIP_MISSING_ITABLE 0x0008 317 318/* 319 * ext2fs_check_if_mounted flags 320 */ 321#define EXT2_MF_MOUNTED 1 322#define EXT2_MF_ISROOT 2 323#define EXT2_MF_READONLY 4 324 325/* 326 * Ext2/linux mode flags. We define them here so that we don't need 327 * to depend on the OS's sys/stat.h, since we may be compiling on a 328 * non-Linux system. 329 */ 330#define LINUX_S_IFMT 00170000 331#define LINUX_S_IFSOCK 0140000 332#define LINUX_S_IFLNK 0120000 333#define LINUX_S_IFREG 0100000 334#define LINUX_S_IFBLK 0060000 335#define LINUX_S_IFDIR 0040000 336#define LINUX_S_IFCHR 0020000 337#define LINUX_S_IFIFO 0010000 338#define LINUX_S_ISUID 0004000 339#define LINUX_S_ISGID 0002000 340#define LINUX_S_ISVTX 0001000 341 342#define LINUX_S_IRWXU 00700 343#define LINUX_S_IRUSR 00400 344#define LINUX_S_IWUSR 00200 345#define LINUX_S_IXUSR 00100 346 347#define LINUX_S_IRWXG 00070 348#define LINUX_S_IRGRP 00040 349#define LINUX_S_IWGRP 00020 350#define LINUX_S_IXGRP 00010 351 352#define LINUX_S_IRWXO 00007 353#define LINUX_S_IROTH 00004 354#define LINUX_S_IWOTH 00002 355#define LINUX_S_IXOTH 00001 356 357#define LINUX_S_ISLNK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFLNK) 358#define LINUX_S_ISREG(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFREG) 359#define LINUX_S_ISDIR(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFDIR) 360#define LINUX_S_ISCHR(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFCHR) 361#define LINUX_S_ISBLK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFBLK) 362#define LINUX_S_ISFIFO(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFIFO) 363#define LINUX_S_ISSOCK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFSOCK) 364 365/* 366 * ext2_icount_t abstraction 367 */ 368#define EXT2_ICOUNT_OPT_INCREMENT 0x01 369 370typedef struct ext2_icount *ext2_icount_t; 371 372/* 373 * Flags for ext2fs_bmap 374 */ 375#define BMAP_ALLOC 1 376 377/* 378 * Flags for imager.c functions 379 */ 380#define IMAGER_FLAG_INODEMAP 1 381#define IMAGER_FLAG_SPARSEWRITE 2 382 383/* 384 * For checking structure magic numbers... 385 */ 386 387#define EXT2_CHECK_MAGIC(struct, code) \ 388 if ((struct)->magic != (code)) return (code) 389 390 391/* 392 * For ext2 compression support 393 */ 394#define EXT2FS_COMPRESSED_BLKADDR ((blk_t) 0xffffffff) 395#define HOLE_BLKADDR(_b) ((_b) == 0 || (_b) == EXT2FS_COMPRESSED_BLKADDR) 396 397/* 398 * Features supprted by this version of the library 399 */ 400#define EXT2_LIB_FEATURE_COMPAT_SUPP (EXT2_FEATURE_COMPAT_DIR_PREALLOC|\ 401 EXT2_FEATURE_COMPAT_IMAGIC_INODES|\ 402 EXT3_FEATURE_COMPAT_HAS_JOURNAL) 403 404/* This #ifdef is temporary until compression is fully supported */ 405#ifdef ENABLE_COMPRESSION 406#ifndef I_KNOW_THAT_COMPRESSION_IS_EXPERIMENTAL 407/* If the below warning bugs you, then have 408 `CPPFLAGS=-DI_KNOW_THAT_COMPRESSION_IS_EXPERIMENTAL' in your 409 environment at configure time. */ 410#warning "Compression support is experimental" 411#endif 412#define EXT2_LIB_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE|\ 413 EXT2_FEATURE_INCOMPAT_COMPRESSION|\ 414 EXT3_FEATURE_INCOMPAT_RECOVER) 415#else 416#define EXT2_LIB_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE|\ 417 EXT3_FEATURE_INCOMPAT_RECOVER) 418#endif 419#define EXT2_LIB_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER|\ 420 EXT2_FEATURE_RO_COMPAT_LARGE_FILE) 421/* 422 * function prototypes 423 */ 424 425/* alloc.c */ 426extern errcode_t ext2fs_new_inode(ext2_filsys fs, ino_t dir, int mode, 427 ext2fs_inode_bitmap map, ino_t *ret); 428extern errcode_t ext2fs_new_block(ext2_filsys fs, blk_t goal, 429 ext2fs_block_bitmap map, blk_t *ret); 430extern errcode_t ext2fs_get_free_blocks(ext2_filsys fs, blk_t start, 431 blk_t finish, int num, 432 ext2fs_block_bitmap map, 433 blk_t *ret); 434extern errcode_t ext2fs_alloc_block(ext2_filsys fs, blk_t goal, 435 char *block_buf, blk_t *ret); 436 437/* alloc_tables.c */ 438extern errcode_t ext2fs_allocate_tables(ext2_filsys fs); 439extern errcode_t ext2fs_allocate_group_table(ext2_filsys fs, dgrp_t group, 440 ext2fs_block_bitmap bmap); 441 442/* badblocks.c */ 443extern errcode_t ext2fs_badblocks_list_create(ext2_badblocks_list *ret, 444 int size); 445extern errcode_t ext2fs_badblocks_list_add(ext2_badblocks_list bb, 446 blk_t blk); 447extern int ext2fs_badblocks_list_test(ext2_badblocks_list bb, 448 blk_t blk); 449extern errcode_t 450 ext2fs_badblocks_list_iterate_begin(ext2_badblocks_list bb, 451 ext2_badblocks_iterate *ret); 452extern int ext2fs_badblocks_list_iterate(ext2_badblocks_iterate iter, 453 blk_t *blk); 454extern void ext2fs_badblocks_list_iterate_end(ext2_badblocks_iterate iter); 455extern errcode_t ext2fs_badblocks_copy(ext2_badblocks_list src, 456 ext2_badblocks_list *dest); 457extern int ext2fs_badblocks_equal(ext2_badblocks_list bb1, 458 ext2_badblocks_list bb2); 459 460/* bb_compat */ 461extern errcode_t badblocks_list_create(badblocks_list *ret, int size); 462extern errcode_t badblocks_list_add(badblocks_list bb, blk_t blk); 463extern int badblocks_list_test(badblocks_list bb, blk_t blk); 464extern errcode_t badblocks_list_iterate_begin(badblocks_list bb, 465 badblocks_iterate *ret); 466extern int badblocks_list_iterate(badblocks_iterate iter, blk_t *blk); 467extern void badblocks_list_iterate_end(badblocks_iterate iter); 468extern void badblocks_list_free(badblocks_list bb); 469 470/* bb_inode.c */ 471extern errcode_t ext2fs_update_bb_inode(ext2_filsys fs, 472 ext2_badblocks_list bb_list); 473 474/* bitmaps.c */ 475extern errcode_t ext2fs_write_inode_bitmap(ext2_filsys fs); 476extern errcode_t ext2fs_write_block_bitmap (ext2_filsys fs); 477extern errcode_t ext2fs_read_inode_bitmap (ext2_filsys fs); 478extern errcode_t ext2fs_read_block_bitmap(ext2_filsys fs); 479extern errcode_t ext2fs_allocate_generic_bitmap(__u32 start, 480 __u32 end, 481 __u32 real_end, 482 const char *descr, 483 ext2fs_generic_bitmap *ret); 484extern errcode_t ext2fs_allocate_block_bitmap(ext2_filsys fs, 485 const char *descr, 486 ext2fs_block_bitmap *ret); 487extern errcode_t ext2fs_allocate_inode_bitmap(ext2_filsys fs, 488 const char *descr, 489 ext2fs_inode_bitmap *ret); 490extern errcode_t ext2fs_fudge_inode_bitmap_end(ext2fs_inode_bitmap bitmap, 491 ino_t end, ino_t *oend); 492extern errcode_t ext2fs_fudge_block_bitmap_end(ext2fs_block_bitmap bitmap, 493 blk_t end, blk_t *oend); 494extern void ext2fs_clear_inode_bitmap(ext2fs_inode_bitmap bitmap); 495extern void ext2fs_clear_block_bitmap(ext2fs_block_bitmap bitmap); 496extern errcode_t ext2fs_read_bitmaps(ext2_filsys fs); 497extern errcode_t ext2fs_write_bitmaps(ext2_filsys fs); 498 499/* block.c */ 500extern errcode_t ext2fs_block_iterate(ext2_filsys fs, 501 ino_t ino, 502 int flags, 503 char *block_buf, 504 int (*func)(ext2_filsys fs, 505 blk_t *blocknr, 506 int blockcnt, 507 void *priv_data), 508 void *priv_data); 509errcode_t ext2fs_block_iterate2(ext2_filsys fs, 510 ino_t ino, 511 int flags, 512 char *block_buf, 513 int (*func)(ext2_filsys fs, 514 blk_t *blocknr, 515 e2_blkcnt_t blockcnt, 516 blk_t ref_blk, 517 int ref_offset, 518 void *priv_data), 519 void *priv_data); 520 521/* bmap.c */ 522extern errcode_t ext2fs_bmap(ext2_filsys fs, ino_t ino, 523 struct ext2_inode *inode, 524 char *block_buf, int bmap_flags, 525 blk_t block, blk_t *phys_blk); 526 527 528#if 0 529/* bmove.c */ 530extern errcode_t ext2fs_move_blocks(ext2_filsys fs, 531 ext2fs_block_bitmap reserve, 532 ext2fs_block_bitmap alloc_map, 533 int flags); 534#endif 535 536/* check_desc.c */ 537extern errcode_t ext2fs_check_desc(ext2_filsys fs); 538 539/* closefs.c */ 540extern errcode_t ext2fs_close(ext2_filsys fs); 541extern errcode_t ext2fs_flush(ext2_filsys fs); 542extern int ext2fs_bg_has_super(ext2_filsys fs, int group_block); 543extern void ext2fs_update_dynamic_rev(ext2_filsys fs); 544 545/* cmp_bitmaps.c */ 546extern errcode_t ext2fs_compare_block_bitmap(ext2fs_block_bitmap bm1, 547 ext2fs_block_bitmap bm2); 548extern errcode_t ext2fs_compare_inode_bitmap(ext2fs_inode_bitmap bm1, 549 ext2fs_inode_bitmap bm2); 550 551/* dblist.c */ 552 553extern errcode_t ext2fs_get_num_dirs(ext2_filsys fs, ino_t *ret_num_dirs); 554extern errcode_t ext2fs_init_dblist(ext2_filsys fs, ext2_dblist *ret_dblist); 555extern errcode_t ext2fs_add_dir_block(ext2_dblist dblist, ino_t ino, 556 blk_t blk, int blockcnt); 557extern errcode_t ext2fs_dblist_iterate(ext2_dblist dblist, 558 int (*func)(ext2_filsys fs, struct ext2_db_entry *db_info, 559 void *priv_data), 560 void *priv_data); 561extern errcode_t ext2fs_set_dir_block(ext2_dblist dblist, ino_t ino, 562 blk_t blk, int blockcnt); 563extern errcode_t ext2fs_copy_dblist(ext2_dblist src, 564 ext2_dblist *dest); 565extern int ext2fs_dblist_count(ext2_dblist dblist); 566 567/* dblist_dir.c */ 568extern errcode_t 569 ext2fs_dblist_dir_iterate(ext2_dblist dblist, 570 int flags, 571 char *block_buf, 572 int (*func)(ino_t dir, 573 int entry, 574 struct ext2_dir_entry *dirent, 575 int offset, 576 int blocksize, 577 char *buf, 578 void *priv_data), 579 void *priv_data); 580 581/* dirblock.c */ 582extern errcode_t ext2fs_read_dir_block(ext2_filsys fs, blk_t block, 583 void *buf); 584extern errcode_t ext2fs_write_dir_block(ext2_filsys fs, blk_t block, 585 void *buf); 586 587/* dir_iterate.c */ 588extern errcode_t ext2fs_dir_iterate(ext2_filsys fs, 589 ino_t dir, 590 int flags, 591 char *block_buf, 592 int (*func)(struct ext2_dir_entry *dirent, 593 int offset, 594 int blocksize, 595 char *buf, 596 void *priv_data), 597 void *priv_data); 598 599/* dupfs.c */ 600extern errcode_t ext2fs_dup_handle(ext2_filsys src, ext2_filsys *dest); 601 602/* expanddir.c */ 603extern errcode_t ext2fs_expand_dir(ext2_filsys fs, ino_t dir); 604 605/* fileio.c */ 606extern errcode_t ext2fs_file_open(ext2_filsys fs, ino_t ino, 607 int flags, ext2_file_t *ret); 608extern ext2_filsys ext2fs_file_get_fs(ext2_file_t file); 609extern errcode_t ext2fs_file_close(ext2_file_t file); 610extern errcode_t ext2fs_file_read(ext2_file_t file, void *buf, 611 unsigned int wanted, unsigned int *got); 612extern errcode_t ext2fs_file_write(ext2_file_t file, void *buf, 613 unsigned int nbytes, unsigned int *written); 614extern errcode_t ext2fs_file_lseek(ext2_file_t file, ext2_off_t offset, 615 int whence, ext2_off_t *ret_pos); 616extern ext2_off_t ext2fs_file_get_size(ext2_file_t file); 617extern errcode_t ext2fs_file_set_size(ext2_file_t file, ext2_off_t size); 618 619/* finddev.c */ 620extern char *ext2fs_find_block_device(dev_t device); 621 622/* freefs.c */ 623extern void ext2fs_free(ext2_filsys fs); 624extern void ext2fs_free_generic_bitmap(ext2fs_inode_bitmap bitmap); 625extern void ext2fs_free_block_bitmap(ext2fs_block_bitmap bitmap); 626extern void ext2fs_free_inode_bitmap(ext2fs_inode_bitmap bitmap); 627extern void ext2fs_free_dblist(ext2_dblist dblist); 628extern void ext2fs_badblocks_list_free(badblocks_list bb); 629 630/* getsize.c */ 631extern errcode_t ext2fs_get_device_size(const char *file, int blocksize, 632 blk_t *retblocks); 633 634/* imager.c */ 635extern errcode_t ext2fs_image_inode_write(ext2_filsys fs, int fd, int flags); 636extern errcode_t ext2fs_image_inode_read(ext2_filsys fs, int fd, int flags); 637extern errcode_t ext2fs_image_super_write(ext2_filsys fs, int fd, int flags); 638extern errcode_t ext2fs_image_super_read(ext2_filsys fs, int fd, int flags); 639extern errcode_t ext2fs_image_bitmap_write(ext2_filsys fs, int fd, int flags); 640extern errcode_t ext2fs_image_bitmap_read(ext2_filsys fs, int fd, int flags); 641 642/* initialize.c */ 643extern errcode_t ext2fs_initialize(const char *name, int flags, 644 struct ext2_super_block *param, 645 io_manager manager, ext2_filsys *ret_fs); 646 647/* inode.c */ 648extern errcode_t ext2fs_flush_icache(ext2_filsys fs); 649extern errcode_t ext2fs_open_inode_scan(ext2_filsys fs, int buffer_blocks, 650 ext2_inode_scan *ret_scan); 651extern void ext2fs_close_inode_scan(ext2_inode_scan scan); 652extern errcode_t ext2fs_get_next_inode(ext2_inode_scan scan, ino_t *ino, 653 struct ext2_inode *inode); 654extern errcode_t ext2fs_inode_scan_goto_blockgroup(ext2_inode_scan scan, 655 int group); 656extern void ext2fs_set_inode_callback 657 (ext2_inode_scan scan, 658 errcode_t (*done_group)(ext2_filsys fs, 659 ext2_inode_scan scan, 660 dgrp_t group, 661 void * priv_data), 662 void *done_group_data); 663extern int ext2fs_inode_scan_flags(ext2_inode_scan scan, int set_flags, 664 int clear_flags); 665extern errcode_t ext2fs_read_inode (ext2_filsys fs, ino_t ino, 666 struct ext2_inode * inode); 667extern errcode_t ext2fs_write_inode(ext2_filsys fs, ino_t ino, 668 struct ext2_inode * inode); 669extern errcode_t ext2fs_get_blocks(ext2_filsys fs, ino_t ino, blk_t *blocks); 670extern errcode_t ext2fs_check_directory(ext2_filsys fs, ino_t ino); 671 672/* icount.c */ 673extern void ext2fs_free_icount(ext2_icount_t icount); 674extern errcode_t ext2fs_create_icount2(ext2_filsys fs, int flags, int size, 675 ext2_icount_t hint, ext2_icount_t *ret); 676extern errcode_t ext2fs_create_icount(ext2_filsys fs, int flags, int size, 677 ext2_icount_t *ret); 678extern errcode_t ext2fs_icount_fetch(ext2_icount_t icount, ino_t ino, 679 __u16 *ret); 680extern errcode_t ext2fs_icount_increment(ext2_icount_t icount, ino_t ino, 681 __u16 *ret); 682extern errcode_t ext2fs_icount_decrement(ext2_icount_t icount, ino_t ino, 683 __u16 *ret); 684extern errcode_t ext2fs_icount_store(ext2_icount_t icount, ino_t ino, 685 __u16 count); 686extern ino_t ext2fs_get_icount_size(ext2_icount_t icount); 687errcode_t ext2fs_icount_validate(ext2_icount_t icount, FILE *); 688 689/* ismounted.c */ 690extern errcode_t ext2fs_check_if_mounted(const char *file, int *mount_flags); 691extern errcode_t ext2fs_check_mount_point(const char *device, int *mount_flags, 692 char *mtpt, int mtlen); 693 694/* namei.c */ 695extern errcode_t ext2fs_lookup(ext2_filsys fs, ino_t dir, const char *name, 696 int namelen, char *buf, ino_t *inode); 697extern errcode_t ext2fs_namei(ext2_filsys fs, ino_t root, ino_t cwd, 698 const char *name, ino_t *inode); 699errcode_t ext2fs_namei_follow(ext2_filsys fs, ino_t root, ino_t cwd, 700 const char *name, ino_t *inode); 701extern errcode_t ext2fs_follow_link(ext2_filsys fs, ino_t root, ino_t cwd, 702 ino_t inode, ino_t *res_inode); 703 704/* native.c */ 705int ext2fs_native_flag(void); 706 707/* newdir.c */ 708extern errcode_t ext2fs_new_dir_block(ext2_filsys fs, ino_t dir_ino, 709 ino_t parent_ino, char **block); 710 711/* mkdir.c */ 712extern errcode_t ext2fs_mkdir(ext2_filsys fs, ino_t parent, ino_t inum, 713 const char *name); 714 715/* mkjournal.c */ 716extern errcode_t ext2fs_add_journal_device(ext2_filsys fs, char *device, 717 blk_t size, int flags); 718extern errcode_t ext2fs_add_journal_inode(ext2_filsys fs, blk_t size, 719 int flags); 720 721/* openfs.c */ 722extern errcode_t ext2fs_open(const char *name, int flags, int superblock, 723 int block_size, io_manager manager, 724 ext2_filsys *ret_fs); 725 726/* get_pathname.c */ 727extern errcode_t ext2fs_get_pathname(ext2_filsys fs, ino_t dir, ino_t ino, 728 char **name); 729 730/* link.c */ 731errcode_t ext2fs_link(ext2_filsys fs, ino_t dir, const char *name, 732 ino_t ino, int flags); 733errcode_t ext2fs_unlink(ext2_filsys fs, ino_t dir, const char *name, 734 ino_t ino, int flags); 735 736/* read_bb.c */ 737extern errcode_t ext2fs_read_bb_inode(ext2_filsys fs, 738 ext2_badblocks_list *bb_list); 739 740/* read_bb_file.c */ 741extern errcode_t ext2fs_read_bb_FILE2(ext2_filsys fs, FILE *f, 742 ext2_badblocks_list *bb_list, 743 void *private, 744 void (*invalid)(ext2_filsys fs, 745 blk_t blk, 746 char *badstr, 747 void *private)); 748extern errcode_t ext2fs_read_bb_FILE(ext2_filsys fs, FILE *f, 749 ext2_badblocks_list *bb_list, 750 void (*invalid)(ext2_filsys fs, 751 blk_t blk)); 752 753/* rs_bitmap.c */ 754extern errcode_t ext2fs_resize_generic_bitmap(__u32 new_end, 755 __u32 new_real_end, 756 ext2fs_generic_bitmap bmap); 757extern errcode_t ext2fs_resize_inode_bitmap(__u32 new_end, __u32 new_real_end, 758 ext2fs_inode_bitmap bmap); 759extern errcode_t ext2fs_resize_block_bitmap(__u32 new_end, __u32 new_real_end, 760 ext2fs_block_bitmap bmap); 761extern errcode_t ext2fs_copy_bitmap(ext2fs_generic_bitmap src, 762 ext2fs_generic_bitmap *dest); 763 764/* swapfs.c */ 765extern void ext2fs_swap_super(struct ext2_super_block * super); 766extern void ext2fs_swap_group_desc(struct ext2_group_desc *gdp); 767extern void ext2fs_swap_inode(ext2_filsys fs,struct ext2_inode *t, 768 struct ext2_inode *f, int hostorder); 769 770/* valid_blk.c */ 771extern int ext2fs_inode_has_valid_blocks(struct ext2_inode *inode); 772 773/* version.c */ 774extern int ext2fs_parse_version_string(const char *ver_string); 775extern int ext2fs_get_library_version(const char **ver_string, 776 const char **date_string); 777 778/* inline functions */ 779extern errcode_t ext2fs_get_mem(unsigned long size, void **ptr); 780extern errcode_t ext2fs_free_mem(void **ptr); 781extern errcode_t ext2fs_resize_mem(unsigned long old_size, 782 unsigned long size, void **ptr); 783extern void ext2fs_mark_super_dirty(ext2_filsys fs); 784extern void ext2fs_mark_changed(ext2_filsys fs); 785extern int ext2fs_test_changed(ext2_filsys fs); 786extern void ext2fs_mark_valid(ext2_filsys fs); 787extern void ext2fs_unmark_valid(ext2_filsys fs); 788extern int ext2fs_test_valid(ext2_filsys fs); 789extern void ext2fs_mark_ib_dirty(ext2_filsys fs); 790extern void ext2fs_mark_bb_dirty(ext2_filsys fs); 791extern int ext2fs_test_ib_dirty(ext2_filsys fs); 792extern int ext2fs_test_bb_dirty(ext2_filsys fs); 793extern int ext2fs_group_of_blk(ext2_filsys fs, blk_t blk); 794extern int ext2fs_group_of_ino(ext2_filsys fs, ino_t ino); 795 796/* 797 * The actual inlined functions definitions themselves... 798 * 799 * If NO_INLINE_FUNCS is defined, then we won't try to do inline 800 * functions at all! 801 */ 802#if (defined(INCLUDE_INLINE_FUNCS) || !defined(NO_INLINE_FUNCS)) 803#ifdef INCLUDE_INLINE_FUNCS 804#define _INLINE_ extern 805#else 806#ifdef __GNUC__ 807#define _INLINE_ extern __inline__ 808#else /* For Watcom C */ 809#define _INLINE_ extern inline 810#endif 811#endif 812 813#ifndef EXT2_CUSTOM_MEMORY_ROUTINES 814/* 815 * Allocate memory 816 */ 817_INLINE_ errcode_t ext2fs_get_mem(unsigned long size, void **ptr) 818{ 819 *ptr = malloc(size); 820 if (!*ptr) 821 return EXT2_ET_NO_MEMORY; 822 return 0; 823} 824 825/* 826 * Free memory 827 */ 828_INLINE_ errcode_t ext2fs_free_mem(void **ptr) 829{ 830 free(*ptr); 831 *ptr = 0; 832 return 0; 833} 834 835/* 836 * Resize memory 837 */ 838_INLINE_ errcode_t ext2fs_resize_mem(unsigned long old_size, 839 unsigned long size, void **ptr) 840{ 841 void *p; 842 843 p = realloc(*ptr, size); 844 if (!p) 845 return EXT2_ET_NO_MEMORY; 846 *ptr = p; 847 return 0; 848} 849#endif /* Custom memory routines */ 850 851/* 852 * Mark a filesystem superblock as dirty 853 */ 854_INLINE_ void ext2fs_mark_super_dirty(ext2_filsys fs) 855{ 856 fs->flags |= EXT2_FLAG_DIRTY | EXT2_FLAG_CHANGED; 857} 858 859/* 860 * Mark a filesystem as changed 861 */ 862_INLINE_ void ext2fs_mark_changed(ext2_filsys fs) 863{ 864 fs->flags |= EXT2_FLAG_CHANGED; 865} 866 867/* 868 * Check to see if a filesystem has changed 869 */ 870_INLINE_ int ext2fs_test_changed(ext2_filsys fs) 871{ 872 return (fs->flags & EXT2_FLAG_CHANGED); 873} 874 875/* 876 * Mark a filesystem as valid 877 */ 878_INLINE_ void ext2fs_mark_valid(ext2_filsys fs) 879{ 880 fs->flags |= EXT2_FLAG_VALID; 881} 882 883/* 884 * Mark a filesystem as NOT valid 885 */ 886_INLINE_ void ext2fs_unmark_valid(ext2_filsys fs) 887{ 888 fs->flags &= ~EXT2_FLAG_VALID; 889} 890 891/* 892 * Check to see if a filesystem is valid 893 */ 894_INLINE_ int ext2fs_test_valid(ext2_filsys fs) 895{ 896 return (fs->flags & EXT2_FLAG_VALID); 897} 898 899/* 900 * Mark the inode bitmap as dirty 901 */ 902_INLINE_ void ext2fs_mark_ib_dirty(ext2_filsys fs) 903{ 904 fs->flags |= EXT2_FLAG_IB_DIRTY | EXT2_FLAG_CHANGED; 905} 906 907/* 908 * Mark the block bitmap as dirty 909 */ 910_INLINE_ void ext2fs_mark_bb_dirty(ext2_filsys fs) 911{ 912 fs->flags |= EXT2_FLAG_BB_DIRTY | EXT2_FLAG_CHANGED; 913} 914 915/* 916 * Check to see if a filesystem's inode bitmap is dirty 917 */ 918_INLINE_ int ext2fs_test_ib_dirty(ext2_filsys fs) 919{ 920 return (fs->flags & EXT2_FLAG_IB_DIRTY); 921} 922 923/* 924 * Check to see if a filesystem's block bitmap is dirty 925 */ 926_INLINE_ int ext2fs_test_bb_dirty(ext2_filsys fs) 927{ 928 return (fs->flags & EXT2_FLAG_BB_DIRTY); 929} 930 931/* 932 * Return the group # of a block 933 */ 934_INLINE_ int ext2fs_group_of_blk(ext2_filsys fs, blk_t blk) 935{ 936 return (blk - fs->super->s_first_data_block) / 937 fs->super->s_blocks_per_group; 938} 939 940/* 941 * Return the group # of an inode number 942 */ 943_INLINE_ int ext2fs_group_of_ino(ext2_filsys fs, ino_t ino) 944{ 945 return (ino - 1) / fs->super->s_inodes_per_group; 946} 947#undef _INLINE_ 948#endif 949 950#ifdef __cplusplus 951} 952#endif 953 954#endif /* _EXT2FS_EXT2FS_H */ 955