ext2fs.h revision 31dbecd482405e0d3a67eb58e1a1c8cb9f2ad83e
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 ext2_ino_t; 65typedef __u32 blk_t; 66typedef __u32 dgrp_t; 67typedef __u32 ext2_off_t; 68typedef __s64 e2_blkcnt_t; 69 70#if EXT2_FLAT_INCLUDES 71#include "com_err.h" 72#include "ext2_io.h" 73#include "ext2_err.h" 74#else 75#include "et/com_err.h" 76#include "ext2fs/ext2_io.h" 77#include "ext2fs/ext2_err.h" 78#endif 79 80/* 81 * Portability help for Microsoft Visual C++ 82 */ 83#ifdef _MSC_VER 84#define EXT2_QSORT_TYPE int __cdecl 85#else 86#define EXT2_QSORT_TYPE int 87#endif 88 89typedef struct struct_ext2_filsys *ext2_filsys; 90 91struct ext2fs_struct_generic_bitmap { 92 errcode_t magic; 93 ext2_filsys fs; 94 __u32 start, end; 95 __u32 real_end; 96 char * description; 97 char * bitmap; 98 errcode_t base_error_code; 99 __u32 reserved[7]; 100}; 101 102#define EXT2FS_MARK_ERROR 0 103#define EXT2FS_UNMARK_ERROR 1 104#define EXT2FS_TEST_ERROR 2 105 106typedef struct ext2fs_struct_generic_bitmap *ext2fs_generic_bitmap; 107typedef struct ext2fs_struct_generic_bitmap *ext2fs_inode_bitmap; 108typedef struct ext2fs_struct_generic_bitmap *ext2fs_block_bitmap; 109 110#ifdef EXT2_DYNAMIC_REV 111#define EXT2_FIRST_INODE(s) EXT2_FIRST_INO(s) 112#else 113#define EXT2_FIRST_INODE(s) EXT2_FIRST_INO 114#define EXT2_INODE_SIZE(s) sizeof(struct ext2_inode) 115#endif 116 117/* 118 * badblocks list definitions 119 */ 120 121typedef struct ext2_struct_badblocks_list *ext2_badblocks_list; 122typedef struct ext2_struct_badblocks_iterate *ext2_badblocks_iterate; 123 124/* old */ 125typedef struct ext2_struct_badblocks_list *badblocks_list; 126typedef struct ext2_struct_badblocks_iterate *badblocks_iterate; 127 128#define BADBLOCKS_FLAG_DIRTY 1 129 130/* 131 * ext2_dblist structure and abstractions (see dblist.c) 132 */ 133struct ext2_db_entry { 134 ext2_ino_t ino; 135 blk_t blk; 136 int blockcnt; 137}; 138 139typedef struct ext2_struct_dblist *ext2_dblist; 140 141#define DBLIST_ABORT 1 142 143/* 144 * ext2_fileio definitions 145 */ 146 147#define EXT2_FILE_WRITE 0x0001 148#define EXT2_FILE_CREATE 0x0002 149 150#define EXT2_FILE_MASK 0x00FF 151 152#define EXT2_FILE_BUF_DIRTY 0x4000 153#define EXT2_FILE_BUF_VALID 0x2000 154 155typedef struct ext2_file *ext2_file_t; 156 157#define EXT2_SEEK_SET 0 158#define EXT2_SEEK_CUR 1 159#define EXT2_SEEK_END 2 160 161/* 162 * Flags for the ext2_filsys structure 163 */ 164#define EXT2_FLAG_RW 0x01 165#define EXT2_FLAG_CHANGED 0x02 166#define EXT2_FLAG_DIRTY 0x04 167#define EXT2_FLAG_VALID 0x08 168#define EXT2_FLAG_IB_DIRTY 0x10 169#define EXT2_FLAG_BB_DIRTY 0x20 170#define EXT2_FLAG_SWAP_BYTES 0x40 171#define EXT2_FLAG_SWAP_BYTES_READ 0x80 172#define EXT2_FLAG_SWAP_BYTES_WRITE 0x100 173#define EXT2_FLAG_MASTER_SB_ONLY 0x200 174#define EXT2_FLAG_FORCE 0x400 175#define EXT2_FLAG_SUPER_ONLY 0x800 176 177/* 178 * Special flag in the ext2 inode i_flag field that means that this is 179 * a new inode. (So that ext2_write_inode() can clear extra fields.) 180 */ 181#define EXT2_NEW_INODE_FL 0x80000000 182 183/* 184 * Flags for mkjournal 185 * 186 * EXT2_MKJOURNAL_V1_SUPER Make a (deprecated) V1 journal superblock 187 */ 188#define EXT2_MKJOURNAL_V1_SUPER 0x0000001 189 190struct struct_ext2_filsys { 191 errcode_t magic; 192 io_channel io; 193 int flags; 194 char * device_name; 195 struct ext2_super_block * super; 196 int blocksize; 197 int fragsize; 198 dgrp_t group_desc_count; 199 unsigned long desc_blocks; 200 struct ext2_group_desc * group_desc; 201 int inode_blocks_per_group; 202 ext2fs_inode_bitmap inode_map; 203 ext2fs_block_bitmap block_map; 204 errcode_t (*get_blocks)(ext2_filsys fs, ext2_ino_t ino, blk_t *blocks); 205 errcode_t (*check_directory)(ext2_filsys fs, ext2_ino_t ino); 206 errcode_t (*write_bitmaps)(ext2_filsys fs); 207 errcode_t (*read_inode)(ext2_filsys fs, ext2_ino_t ino, 208 struct ext2_inode *inode); 209 errcode_t (*write_inode)(ext2_filsys fs, ext2_ino_t ino, 210 struct ext2_inode *inode); 211 badblocks_list badblocks; 212 ext2_dblist dblist; 213 __u32 stride; /* for mke2fs */ 214 struct ext2_super_block * orig_super; 215 /* 216 * Reserved for future expansion 217 */ 218 __u32 reserved[10]; 219 220 /* 221 * Reserved for the use of the calling application. 222 */ 223 void * priv_data; 224 225 /* 226 * Inode cache 227 */ 228 struct ext2_inode_cache *icache; 229}; 230 231#if EXT2_FLAT_INCLUDES 232#include "e2_bitops.h" 233#else 234#include "ext2fs/bitops.h" 235#endif 236 237/* 238 * Return flags for the block iterator functions 239 */ 240#define BLOCK_CHANGED 1 241#define BLOCK_ABORT 2 242#define BLOCK_ERROR 4 243 244/* 245 * Block interate flags 246 * 247 * BLOCK_FLAG_APPEND, or BLOCK_FLAG_HOLE, indicates that the interator 248 * function should be called on blocks where the block number is zero. 249 * This is used by ext2fs_expand_dir() to be able to add a new block 250 * to an inode. It can also be used for programs that want to be able 251 * to deal with files that contain "holes". 252 * 253 * BLOCK_FLAG_TRAVERSE indicates that the iterator function for the 254 * indirect, doubly indirect, etc. blocks should be called after all 255 * of the blocks containined in the indirect blocks are processed. 256 * This is useful if you are going to be deallocating blocks from an 257 * inode. 258 * 259 * BLOCK_FLAG_DATA_ONLY indicates that the iterator function should be 260 * called for data blocks only. 261 * 262 * BLOCK_FLAG_NO_LARGE is for internal use only. It informs 263 * ext2fs_block_iterate2 that large files won't be accepted. 264 */ 265#define BLOCK_FLAG_APPEND 1 266#define BLOCK_FLAG_HOLE 1 267#define BLOCK_FLAG_DEPTH_TRAVERSE 2 268#define BLOCK_FLAG_DATA_ONLY 4 269 270#define BLOCK_FLAG_NO_LARGE 0x1000 271 272/* 273 * Magic "block count" return values for the block iterator function. 274 */ 275#define BLOCK_COUNT_IND (-1) 276#define BLOCK_COUNT_DIND (-2) 277#define BLOCK_COUNT_TIND (-3) 278#define BLOCK_COUNT_TRANSLATOR (-4) 279 280#if 0 281/* 282 * Flags for ext2fs_move_blocks 283 */ 284#define EXT2_BMOVE_GET_DBLIST 0x0001 285#define EXT2_BMOVE_DEBUG 0x0002 286#endif 287 288/* 289 * Return flags for the directory iterator functions 290 */ 291#define DIRENT_CHANGED 1 292#define DIRENT_ABORT 2 293#define DIRENT_ERROR 3 294 295/* 296 * Directory iterator flags 297 */ 298 299#define DIRENT_FLAG_INCLUDE_EMPTY 1 300 301 302#define DIRENT_DOT_FILE 1 303#define DIRENT_DOT_DOT_FILE 2 304#define DIRENT_OTHER_FILE 3 305 306/* 307 * Inode scan definitions 308 */ 309typedef struct ext2_struct_inode_scan *ext2_inode_scan; 310 311/* 312 * ext2fs_scan flags 313 */ 314#define EXT2_SF_CHK_BADBLOCKS 0x0001 315#define EXT2_SF_BAD_INODE_BLK 0x0002 316#define EXT2_SF_BAD_EXTRA_BYTES 0x0004 317#define EXT2_SF_SKIP_MISSING_ITABLE 0x0008 318 319/* 320 * ext2fs_check_if_mounted flags 321 */ 322#define EXT2_MF_MOUNTED 1 323#define EXT2_MF_ISROOT 2 324#define EXT2_MF_READONLY 4 325 326/* 327 * Ext2/linux mode flags. We define them here so that we don't need 328 * to depend on the OS's sys/stat.h, since we may be compiling on a 329 * non-Linux system. 330 */ 331#define LINUX_S_IFMT 00170000 332#define LINUX_S_IFSOCK 0140000 333#define LINUX_S_IFLNK 0120000 334#define LINUX_S_IFREG 0100000 335#define LINUX_S_IFBLK 0060000 336#define LINUX_S_IFDIR 0040000 337#define LINUX_S_IFCHR 0020000 338#define LINUX_S_IFIFO 0010000 339#define LINUX_S_ISUID 0004000 340#define LINUX_S_ISGID 0002000 341#define LINUX_S_ISVTX 0001000 342 343#define LINUX_S_IRWXU 00700 344#define LINUX_S_IRUSR 00400 345#define LINUX_S_IWUSR 00200 346#define LINUX_S_IXUSR 00100 347 348#define LINUX_S_IRWXG 00070 349#define LINUX_S_IRGRP 00040 350#define LINUX_S_IWGRP 00020 351#define LINUX_S_IXGRP 00010 352 353#define LINUX_S_IRWXO 00007 354#define LINUX_S_IROTH 00004 355#define LINUX_S_IWOTH 00002 356#define LINUX_S_IXOTH 00001 357 358#define LINUX_S_ISLNK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFLNK) 359#define LINUX_S_ISREG(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFREG) 360#define LINUX_S_ISDIR(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFDIR) 361#define LINUX_S_ISCHR(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFCHR) 362#define LINUX_S_ISBLK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFBLK) 363#define LINUX_S_ISFIFO(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFIFO) 364#define LINUX_S_ISSOCK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFSOCK) 365 366/* 367 * ext2_icount_t abstraction 368 */ 369#define EXT2_ICOUNT_OPT_INCREMENT 0x01 370 371typedef struct ext2_icount *ext2_icount_t; 372 373/* 374 * Flags for ext2fs_bmap 375 */ 376#define BMAP_ALLOC 1 377 378/* 379 * Flags for imager.c functions 380 */ 381#define IMAGER_FLAG_INODEMAP 1 382#define IMAGER_FLAG_SPARSEWRITE 2 383 384/* 385 * For checking structure magic numbers... 386 */ 387 388#define EXT2_CHECK_MAGIC(struct, code) \ 389 if ((struct)->magic != (code)) return (code) 390 391 392/* 393 * For ext2 compression support 394 */ 395#define EXT2FS_COMPRESSED_BLKADDR ((blk_t) 0xffffffff) 396#define HOLE_BLKADDR(_b) ((_b) == 0 || (_b) == EXT2FS_COMPRESSED_BLKADDR) 397 398/* 399 * Features supprted by this version of the library 400 */ 401#define EXT2_LIB_FEATURE_COMPAT_SUPP (EXT2_FEATURE_COMPAT_DIR_PREALLOC|\ 402 EXT2_FEATURE_COMPAT_IMAGIC_INODES|\ 403 EXT3_FEATURE_COMPAT_HAS_JOURNAL) 404 405/* This #ifdef is temporary until compression is fully supported */ 406#ifdef ENABLE_COMPRESSION 407#ifndef I_KNOW_THAT_COMPRESSION_IS_EXPERIMENTAL 408/* If the below warning bugs you, then have 409 `CPPFLAGS=-DI_KNOW_THAT_COMPRESSION_IS_EXPERIMENTAL' in your 410 environment at configure time. */ 411 #warning "Compression support is experimental" 412#endif 413#define EXT2_LIB_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE|\ 414 EXT2_FEATURE_INCOMPAT_COMPRESSION|\ 415 EXT3_FEATURE_INCOMPAT_RECOVER) 416#else 417#define EXT2_LIB_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE|\ 418 EXT3_FEATURE_INCOMPAT_RECOVER) 419#endif 420#define EXT2_LIB_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER|\ 421 EXT2_FEATURE_RO_COMPAT_LARGE_FILE) 422/* 423 * function prototypes 424 */ 425 426/* alloc.c */ 427extern errcode_t ext2fs_new_inode(ext2_filsys fs, ext2_ino_t dir, int mode, 428 ext2fs_inode_bitmap map, ext2_ino_t *ret); 429extern errcode_t ext2fs_new_block(ext2_filsys fs, blk_t goal, 430 ext2fs_block_bitmap map, blk_t *ret); 431extern errcode_t ext2fs_get_free_blocks(ext2_filsys fs, blk_t start, 432 blk_t finish, int num, 433 ext2fs_block_bitmap map, 434 blk_t *ret); 435extern errcode_t ext2fs_alloc_block(ext2_filsys fs, blk_t goal, 436 char *block_buf, blk_t *ret); 437 438/* alloc_tables.c */ 439extern errcode_t ext2fs_allocate_tables(ext2_filsys fs); 440extern errcode_t ext2fs_allocate_group_table(ext2_filsys fs, dgrp_t group, 441 ext2fs_block_bitmap bmap); 442 443/* badblocks.c */ 444extern errcode_t ext2fs_badblocks_list_create(ext2_badblocks_list *ret, 445 int size); 446extern errcode_t ext2fs_badblocks_list_add(ext2_badblocks_list bb, 447 blk_t blk); 448extern int ext2fs_badblocks_list_test(ext2_badblocks_list bb, 449 blk_t blk); 450extern errcode_t 451 ext2fs_badblocks_list_iterate_begin(ext2_badblocks_list bb, 452 ext2_badblocks_iterate *ret); 453extern int ext2fs_badblocks_list_iterate(ext2_badblocks_iterate iter, 454 blk_t *blk); 455extern void ext2fs_badblocks_list_iterate_end(ext2_badblocks_iterate iter); 456extern errcode_t ext2fs_badblocks_copy(ext2_badblocks_list src, 457 ext2_badblocks_list *dest); 458extern int ext2fs_badblocks_equal(ext2_badblocks_list bb1, 459 ext2_badblocks_list bb2); 460 461/* bb_compat */ 462extern errcode_t badblocks_list_create(badblocks_list *ret, int size); 463extern errcode_t badblocks_list_add(badblocks_list bb, blk_t blk); 464extern int badblocks_list_test(badblocks_list bb, blk_t blk); 465extern errcode_t badblocks_list_iterate_begin(badblocks_list bb, 466 badblocks_iterate *ret); 467extern int badblocks_list_iterate(badblocks_iterate iter, blk_t *blk); 468extern void badblocks_list_iterate_end(badblocks_iterate iter); 469extern void badblocks_list_free(badblocks_list bb); 470 471/* bb_inode.c */ 472extern errcode_t ext2fs_update_bb_inode(ext2_filsys fs, 473 ext2_badblocks_list bb_list); 474 475/* bitmaps.c */ 476extern errcode_t ext2fs_write_inode_bitmap(ext2_filsys fs); 477extern errcode_t ext2fs_write_block_bitmap (ext2_filsys fs); 478extern errcode_t ext2fs_read_inode_bitmap (ext2_filsys fs); 479extern errcode_t ext2fs_read_block_bitmap(ext2_filsys fs); 480extern errcode_t ext2fs_allocate_generic_bitmap(__u32 start, 481 __u32 end, 482 __u32 real_end, 483 const char *descr, 484 ext2fs_generic_bitmap *ret); 485extern errcode_t ext2fs_allocate_block_bitmap(ext2_filsys fs, 486 const char *descr, 487 ext2fs_block_bitmap *ret); 488extern errcode_t ext2fs_allocate_inode_bitmap(ext2_filsys fs, 489 const char *descr, 490 ext2fs_inode_bitmap *ret); 491extern errcode_t ext2fs_fudge_inode_bitmap_end(ext2fs_inode_bitmap bitmap, 492 ext2_ino_t end, ext2_ino_t *oend); 493extern errcode_t ext2fs_fudge_block_bitmap_end(ext2fs_block_bitmap bitmap, 494 blk_t end, blk_t *oend); 495extern void ext2fs_clear_inode_bitmap(ext2fs_inode_bitmap bitmap); 496extern void ext2fs_clear_block_bitmap(ext2fs_block_bitmap bitmap); 497extern errcode_t ext2fs_read_bitmaps(ext2_filsys fs); 498extern errcode_t ext2fs_write_bitmaps(ext2_filsys fs); 499 500/* block.c */ 501extern errcode_t ext2fs_block_iterate(ext2_filsys fs, 502 ext2_ino_t ino, 503 int flags, 504 char *block_buf, 505 int (*func)(ext2_filsys fs, 506 blk_t *blocknr, 507 int blockcnt, 508 void *priv_data), 509 void *priv_data); 510errcode_t ext2fs_block_iterate2(ext2_filsys fs, 511 ext2_ino_t ino, 512 int flags, 513 char *block_buf, 514 int (*func)(ext2_filsys fs, 515 blk_t *blocknr, 516 e2_blkcnt_t blockcnt, 517 blk_t ref_blk, 518 int ref_offset, 519 void *priv_data), 520 void *priv_data); 521 522/* bmap.c */ 523extern errcode_t ext2fs_bmap(ext2_filsys fs, ext2_ino_t ino, 524 struct ext2_inode *inode, 525 char *block_buf, int bmap_flags, 526 blk_t block, blk_t *phys_blk); 527 528 529#if 0 530/* bmove.c */ 531extern errcode_t ext2fs_move_blocks(ext2_filsys fs, 532 ext2fs_block_bitmap reserve, 533 ext2fs_block_bitmap alloc_map, 534 int flags); 535#endif 536 537/* check_desc.c */ 538extern errcode_t ext2fs_check_desc(ext2_filsys fs); 539 540/* closefs.c */ 541extern errcode_t ext2fs_close(ext2_filsys fs); 542extern errcode_t ext2fs_flush(ext2_filsys fs); 543extern int ext2fs_bg_has_super(ext2_filsys fs, int group_block); 544extern void ext2fs_update_dynamic_rev(ext2_filsys fs); 545 546/* cmp_bitmaps.c */ 547extern errcode_t ext2fs_compare_block_bitmap(ext2fs_block_bitmap bm1, 548 ext2fs_block_bitmap bm2); 549extern errcode_t ext2fs_compare_inode_bitmap(ext2fs_inode_bitmap bm1, 550 ext2fs_inode_bitmap bm2); 551 552/* dblist.c */ 553 554extern errcode_t ext2fs_get_num_dirs(ext2_filsys fs, ext2_ino_t *ret_num_dirs); 555extern errcode_t ext2fs_init_dblist(ext2_filsys fs, ext2_dblist *ret_dblist); 556extern errcode_t ext2fs_add_dir_block(ext2_dblist dblist, ext2_ino_t ino, 557 blk_t blk, int blockcnt); 558extern errcode_t ext2fs_dblist_iterate(ext2_dblist dblist, 559 int (*func)(ext2_filsys fs, struct ext2_db_entry *db_info, 560 void *priv_data), 561 void *priv_data); 562extern errcode_t ext2fs_set_dir_block(ext2_dblist dblist, ext2_ino_t ino, 563 blk_t blk, int blockcnt); 564extern errcode_t ext2fs_copy_dblist(ext2_dblist src, 565 ext2_dblist *dest); 566extern int ext2fs_dblist_count(ext2_dblist dblist); 567 568/* dblist_dir.c */ 569extern errcode_t 570 ext2fs_dblist_dir_iterate(ext2_dblist dblist, 571 int flags, 572 char *block_buf, 573 int (*func)(ext2_ino_t dir, 574 int entry, 575 struct ext2_dir_entry *dirent, 576 int offset, 577 int blocksize, 578 char *buf, 579 void *priv_data), 580 void *priv_data); 581 582/* dirblock.c */ 583extern errcode_t ext2fs_read_dir_block(ext2_filsys fs, blk_t block, 584 void *buf); 585extern errcode_t ext2fs_write_dir_block(ext2_filsys fs, blk_t block, 586 void *buf); 587 588/* dir_iterate.c */ 589extern errcode_t ext2fs_dir_iterate(ext2_filsys fs, 590 ext2_ino_t dir, 591 int flags, 592 char *block_buf, 593 int (*func)(struct ext2_dir_entry *dirent, 594 int offset, 595 int blocksize, 596 char *buf, 597 void *priv_data), 598 void *priv_data); 599 600/* dupfs.c */ 601extern errcode_t ext2fs_dup_handle(ext2_filsys src, ext2_filsys *dest); 602 603/* expanddir.c */ 604extern errcode_t ext2fs_expand_dir(ext2_filsys fs, ext2_ino_t dir); 605 606/* fileio.c */ 607extern errcode_t ext2fs_file_open(ext2_filsys fs, ext2_ino_t ino, 608 int flags, ext2_file_t *ret); 609extern ext2_filsys ext2fs_file_get_fs(ext2_file_t file); 610extern errcode_t ext2fs_file_close(ext2_file_t file); 611extern errcode_t ext2fs_file_read(ext2_file_t file, void *buf, 612 unsigned int wanted, unsigned int *got); 613extern errcode_t ext2fs_file_write(ext2_file_t file, void *buf, 614 unsigned int nbytes, unsigned int *written); 615extern errcode_t ext2fs_file_lseek(ext2_file_t file, ext2_off_t offset, 616 int whence, ext2_off_t *ret_pos); 617extern ext2_off_t ext2fs_file_get_size(ext2_file_t file); 618extern errcode_t ext2fs_file_set_size(ext2_file_t file, ext2_off_t size); 619 620/* finddev.c */ 621extern char *ext2fs_find_block_device(dev_t device); 622 623/* freefs.c */ 624extern void ext2fs_free(ext2_filsys fs); 625extern void ext2fs_free_generic_bitmap(ext2fs_inode_bitmap bitmap); 626extern void ext2fs_free_block_bitmap(ext2fs_block_bitmap bitmap); 627extern void ext2fs_free_inode_bitmap(ext2fs_inode_bitmap bitmap); 628extern void ext2fs_free_dblist(ext2_dblist dblist); 629extern void ext2fs_badblocks_list_free(badblocks_list bb); 630 631/* getsize.c */ 632extern errcode_t ext2fs_get_device_size(const char *file, int blocksize, 633 blk_t *retblocks); 634 635/* imager.c */ 636extern errcode_t ext2fs_image_inode_write(ext2_filsys fs, int fd, int flags); 637extern errcode_t ext2fs_image_inode_read(ext2_filsys fs, int fd, int flags); 638extern errcode_t ext2fs_image_super_write(ext2_filsys fs, int fd, int flags); 639extern errcode_t ext2fs_image_super_read(ext2_filsys fs, int fd, int flags); 640extern errcode_t ext2fs_image_bitmap_write(ext2_filsys fs, int fd, int flags); 641extern errcode_t ext2fs_image_bitmap_read(ext2_filsys fs, int fd, int flags); 642 643/* initialize.c */ 644extern errcode_t ext2fs_initialize(const char *name, int flags, 645 struct ext2_super_block *param, 646 io_manager manager, ext2_filsys *ret_fs); 647 648/* inode.c */ 649extern errcode_t ext2fs_flush_icache(ext2_filsys fs); 650extern errcode_t ext2fs_open_inode_scan(ext2_filsys fs, int buffer_blocks, 651 ext2_inode_scan *ret_scan); 652extern void ext2fs_close_inode_scan(ext2_inode_scan scan); 653extern errcode_t ext2fs_get_next_inode(ext2_inode_scan scan, ext2_ino_t *ino, 654 struct ext2_inode *inode); 655extern errcode_t ext2fs_inode_scan_goto_blockgroup(ext2_inode_scan scan, 656 int group); 657extern void ext2fs_set_inode_callback 658 (ext2_inode_scan scan, 659 errcode_t (*done_group)(ext2_filsys fs, 660 ext2_inode_scan scan, 661 dgrp_t group, 662 void * priv_data), 663 void *done_group_data); 664extern int ext2fs_inode_scan_flags(ext2_inode_scan scan, int set_flags, 665 int clear_flags); 666extern errcode_t ext2fs_read_inode (ext2_filsys fs, ext2_ino_t ino, 667 struct ext2_inode * inode); 668extern errcode_t ext2fs_write_inode(ext2_filsys fs, ext2_ino_t ino, 669 struct ext2_inode * inode); 670extern errcode_t ext2fs_get_blocks(ext2_filsys fs, ext2_ino_t ino, blk_t *blocks); 671extern errcode_t ext2fs_check_directory(ext2_filsys fs, ext2_ino_t ino); 672 673/* icount.c */ 674extern void ext2fs_free_icount(ext2_icount_t icount); 675extern errcode_t ext2fs_create_icount2(ext2_filsys fs, int flags, int size, 676 ext2_icount_t hint, ext2_icount_t *ret); 677extern errcode_t ext2fs_create_icount(ext2_filsys fs, int flags, int size, 678 ext2_icount_t *ret); 679extern errcode_t ext2fs_icount_fetch(ext2_icount_t icount, ext2_ino_t ino, 680 __u16 *ret); 681extern errcode_t ext2fs_icount_increment(ext2_icount_t icount, ext2_ino_t ino, 682 __u16 *ret); 683extern errcode_t ext2fs_icount_decrement(ext2_icount_t icount, ext2_ino_t ino, 684 __u16 *ret); 685extern errcode_t ext2fs_icount_store(ext2_icount_t icount, ext2_ino_t ino, 686 __u16 count); 687extern ext2_ino_t ext2fs_get_icount_size(ext2_icount_t icount); 688errcode_t ext2fs_icount_validate(ext2_icount_t icount, FILE *); 689 690/* ismounted.c */ 691extern errcode_t ext2fs_check_if_mounted(const char *file, int *mount_flags); 692extern errcode_t ext2fs_check_mount_point(const char *device, int *mount_flags, 693 char *mtpt, int mtlen); 694 695/* namei.c */ 696extern errcode_t ext2fs_lookup(ext2_filsys fs, ext2_ino_t dir, const char *name, 697 int namelen, char *buf, ext2_ino_t *inode); 698extern errcode_t ext2fs_namei(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd, 699 const char *name, ext2_ino_t *inode); 700errcode_t ext2fs_namei_follow(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd, 701 const char *name, ext2_ino_t *inode); 702extern errcode_t ext2fs_follow_link(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd, 703 ext2_ino_t inode, ext2_ino_t *res_inode); 704 705/* native.c */ 706int ext2fs_native_flag(void); 707 708/* newdir.c */ 709extern errcode_t ext2fs_new_dir_block(ext2_filsys fs, ext2_ino_t dir_ino, 710 ext2_ino_t parent_ino, char **block); 711 712/* mkdir.c */ 713extern errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum, 714 const char *name); 715 716/* mkjournal.c */ 717extern errcode_t ext2fs_add_journal_device(ext2_filsys fs, char *device, 718 blk_t size, int flags); 719extern errcode_t ext2fs_add_journal_inode(ext2_filsys fs, blk_t size, 720 int flags); 721 722/* openfs.c */ 723extern errcode_t ext2fs_open(const char *name, int flags, int superblock, 724 int block_size, io_manager manager, 725 ext2_filsys *ret_fs); 726 727/* get_pathname.c */ 728extern errcode_t ext2fs_get_pathname(ext2_filsys fs, ext2_ino_t dir, ext2_ino_t ino, 729 char **name); 730 731/* link.c */ 732errcode_t ext2fs_link(ext2_filsys fs, ext2_ino_t dir, const char *name, 733 ext2_ino_t ino, int flags); 734errcode_t ext2fs_unlink(ext2_filsys fs, ext2_ino_t dir, const char *name, 735 ext2_ino_t ino, int flags); 736 737/* read_bb.c */ 738extern errcode_t ext2fs_read_bb_inode(ext2_filsys fs, 739 ext2_badblocks_list *bb_list); 740 741/* read_bb_file.c */ 742extern errcode_t ext2fs_read_bb_FILE2(ext2_filsys fs, FILE *f, 743 ext2_badblocks_list *bb_list, 744 void *private, 745 void (*invalid)(ext2_filsys fs, 746 blk_t blk, 747 char *badstr, 748 void *private)); 749extern errcode_t ext2fs_read_bb_FILE(ext2_filsys fs, FILE *f, 750 ext2_badblocks_list *bb_list, 751 void (*invalid)(ext2_filsys fs, 752 blk_t blk)); 753 754/* rs_bitmap.c */ 755extern errcode_t ext2fs_resize_generic_bitmap(__u32 new_end, 756 __u32 new_real_end, 757 ext2fs_generic_bitmap bmap); 758extern errcode_t ext2fs_resize_inode_bitmap(__u32 new_end, __u32 new_real_end, 759 ext2fs_inode_bitmap bmap); 760extern errcode_t ext2fs_resize_block_bitmap(__u32 new_end, __u32 new_real_end, 761 ext2fs_block_bitmap bmap); 762extern errcode_t ext2fs_copy_bitmap(ext2fs_generic_bitmap src, 763 ext2fs_generic_bitmap *dest); 764 765/* swapfs.c */ 766extern void ext2fs_swap_super(struct ext2_super_block * super); 767extern void ext2fs_swap_group_desc(struct ext2_group_desc *gdp); 768extern void ext2fs_swap_inode(ext2_filsys fs,struct ext2_inode *t, 769 struct ext2_inode *f, int hostorder); 770 771/* valid_blk.c */ 772extern int ext2fs_inode_has_valid_blocks(struct ext2_inode *inode); 773 774/* version.c */ 775extern int ext2fs_parse_version_string(const char *ver_string); 776extern int ext2fs_get_library_version(const char **ver_string, 777 const char **date_string); 778 779/* write_bb_file.c */ 780extern errcode_t ext2fs_write_bb_FILE(ext2_badblocks_list bb_list, 781 unsigned int flags, 782 FILE *f); 783 784 785/* inline functions */ 786extern errcode_t ext2fs_get_mem(unsigned long size, void **ptr); 787extern errcode_t ext2fs_free_mem(void **ptr); 788extern errcode_t ext2fs_resize_mem(unsigned long old_size, 789 unsigned long size, void **ptr); 790extern void ext2fs_mark_super_dirty(ext2_filsys fs); 791extern void ext2fs_mark_changed(ext2_filsys fs); 792extern int ext2fs_test_changed(ext2_filsys fs); 793extern void ext2fs_mark_valid(ext2_filsys fs); 794extern void ext2fs_unmark_valid(ext2_filsys fs); 795extern int ext2fs_test_valid(ext2_filsys fs); 796extern void ext2fs_mark_ib_dirty(ext2_filsys fs); 797extern void ext2fs_mark_bb_dirty(ext2_filsys fs); 798extern int ext2fs_test_ib_dirty(ext2_filsys fs); 799extern int ext2fs_test_bb_dirty(ext2_filsys fs); 800extern int ext2fs_group_of_blk(ext2_filsys fs, blk_t blk); 801extern int ext2fs_group_of_ino(ext2_filsys fs, ext2_ino_t ino); 802 803/* 804 * The actual inlined functions definitions themselves... 805 * 806 * If NO_INLINE_FUNCS is defined, then we won't try to do inline 807 * functions at all! 808 */ 809#if (defined(INCLUDE_INLINE_FUNCS) || !defined(NO_INLINE_FUNCS)) 810#ifdef INCLUDE_INLINE_FUNCS 811#define _INLINE_ extern 812#else 813#ifdef __GNUC__ 814#define _INLINE_ extern __inline__ 815#else /* For Watcom C */ 816#define _INLINE_ extern inline 817#endif 818#endif 819 820#ifndef EXT2_CUSTOM_MEMORY_ROUTINES 821/* 822 * Allocate memory 823 */ 824_INLINE_ errcode_t ext2fs_get_mem(unsigned long size, void **ptr) 825{ 826 *ptr = malloc(size); 827 if (!*ptr) 828 return EXT2_ET_NO_MEMORY; 829 return 0; 830} 831 832/* 833 * Free memory 834 */ 835_INLINE_ errcode_t ext2fs_free_mem(void **ptr) 836{ 837 free(*ptr); 838 *ptr = 0; 839 return 0; 840} 841 842/* 843 * Resize memory 844 */ 845_INLINE_ errcode_t ext2fs_resize_mem(unsigned long old_size, 846 unsigned long size, void **ptr) 847{ 848 void *p; 849 850 p = realloc(*ptr, size); 851 if (!p) 852 return EXT2_ET_NO_MEMORY; 853 *ptr = p; 854 return 0; 855} 856#endif /* Custom memory routines */ 857 858/* 859 * Mark a filesystem superblock as dirty 860 */ 861_INLINE_ void ext2fs_mark_super_dirty(ext2_filsys fs) 862{ 863 fs->flags |= EXT2_FLAG_DIRTY | EXT2_FLAG_CHANGED; 864} 865 866/* 867 * Mark a filesystem as changed 868 */ 869_INLINE_ void ext2fs_mark_changed(ext2_filsys fs) 870{ 871 fs->flags |= EXT2_FLAG_CHANGED; 872} 873 874/* 875 * Check to see if a filesystem has changed 876 */ 877_INLINE_ int ext2fs_test_changed(ext2_filsys fs) 878{ 879 return (fs->flags & EXT2_FLAG_CHANGED); 880} 881 882/* 883 * Mark a filesystem as valid 884 */ 885_INLINE_ void ext2fs_mark_valid(ext2_filsys fs) 886{ 887 fs->flags |= EXT2_FLAG_VALID; 888} 889 890/* 891 * Mark a filesystem as NOT valid 892 */ 893_INLINE_ void ext2fs_unmark_valid(ext2_filsys fs) 894{ 895 fs->flags &= ~EXT2_FLAG_VALID; 896} 897 898/* 899 * Check to see if a filesystem is valid 900 */ 901_INLINE_ int ext2fs_test_valid(ext2_filsys fs) 902{ 903 return (fs->flags & EXT2_FLAG_VALID); 904} 905 906/* 907 * Mark the inode bitmap as dirty 908 */ 909_INLINE_ void ext2fs_mark_ib_dirty(ext2_filsys fs) 910{ 911 fs->flags |= EXT2_FLAG_IB_DIRTY | EXT2_FLAG_CHANGED; 912} 913 914/* 915 * Mark the block bitmap as dirty 916 */ 917_INLINE_ void ext2fs_mark_bb_dirty(ext2_filsys fs) 918{ 919 fs->flags |= EXT2_FLAG_BB_DIRTY | EXT2_FLAG_CHANGED; 920} 921 922/* 923 * Check to see if a filesystem's inode bitmap is dirty 924 */ 925_INLINE_ int ext2fs_test_ib_dirty(ext2_filsys fs) 926{ 927 return (fs->flags & EXT2_FLAG_IB_DIRTY); 928} 929 930/* 931 * Check to see if a filesystem's block bitmap is dirty 932 */ 933_INLINE_ int ext2fs_test_bb_dirty(ext2_filsys fs) 934{ 935 return (fs->flags & EXT2_FLAG_BB_DIRTY); 936} 937 938/* 939 * Return the group # of a block 940 */ 941_INLINE_ int ext2fs_group_of_blk(ext2_filsys fs, blk_t blk) 942{ 943 return (blk - fs->super->s_first_data_block) / 944 fs->super->s_blocks_per_group; 945} 946 947/* 948 * Return the group # of an inode number 949 */ 950_INLINE_ int ext2fs_group_of_ino(ext2_filsys fs, ext2_ino_t ino) 951{ 952 return (ino - 1) / fs->super->s_inodes_per_group; 953} 954#undef _INLINE_ 955#endif 956 957#ifdef __cplusplus 958} 959#endif 960 961#endif /* _EXT2FS_EXT2FS_H */ 962