ext2fs.h revision e5b38a5fafe4807b54d90a2e70bddf4b41b1695b
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 174 175/* 176 * Special flag in the ext2 inode i_flag field that means that this is 177 * a new inode. (So that ext2_write_inode() can clear extra fields.) 178 */ 179#define EXT2_NEW_INODE_FL 0x80000000 180 181/* 182 * Flags for mkjournal 183 * 184 * EXT2_MKJOURNAL_V1_SUPER Make a (deprecated) V1 journal superblock 185 */ 186#define EXT2_MKJOURNAL_V1_SUPER 0x0000001 187 188struct struct_ext2_filsys { 189 errcode_t magic; 190 io_channel io; 191 int flags; 192 char * device_name; 193 struct ext2_super_block * super; 194 int blocksize; 195 int fragsize; 196 dgrp_t group_desc_count; 197 unsigned long desc_blocks; 198 struct ext2_group_desc * group_desc; 199 int inode_blocks_per_group; 200 ext2fs_inode_bitmap inode_map; 201 ext2fs_block_bitmap block_map; 202 errcode_t (*get_blocks)(ext2_filsys fs, ino_t ino, blk_t *blocks); 203 errcode_t (*check_directory)(ext2_filsys fs, ino_t ino); 204 errcode_t (*write_bitmaps)(ext2_filsys fs); 205 errcode_t (*read_inode)(ext2_filsys fs, ino_t ino, 206 struct ext2_inode *inode); 207 errcode_t (*write_inode)(ext2_filsys fs, ino_t ino, 208 struct ext2_inode *inode); 209 badblocks_list badblocks; 210 ext2_dblist dblist; 211 __u32 stride; /* for mke2fs */ 212 struct ext2_super_block * orig_super; 213 /* 214 * Reserved for future expansion 215 */ 216 __u32 reserved[10]; 217 218 /* 219 * Reserved for the use of the calling application. 220 */ 221 void * priv_data; 222 223 /* 224 * Inode cache 225 */ 226 struct ext2_inode_cache *icache; 227}; 228 229#if EXT2_FLAT_INCLUDES 230#include "e2_bitops.h" 231#else 232#include "ext2fs/bitops.h" 233#endif 234 235/* 236 * Return flags for the block iterator functions 237 */ 238#define BLOCK_CHANGED 1 239#define BLOCK_ABORT 2 240#define BLOCK_ERROR 4 241 242/* 243 * Block interate flags 244 * 245 * BLOCK_FLAG_APPEND, or BLOCK_FLAG_HOLE, indicates that the interator 246 * function should be called on blocks where the block number is zero. 247 * This is used by ext2fs_expand_dir() to be able to add a new block 248 * to an inode. It can also be used for programs that want to be able 249 * to deal with files that contain "holes". 250 * 251 * BLOCK_FLAG_TRAVERSE indicates that the iterator function for the 252 * indirect, doubly indirect, etc. blocks should be called after all 253 * of the blocks containined in the indirect blocks are processed. 254 * This is useful if you are going to be deallocating blocks from an 255 * inode. 256 * 257 * BLOCK_FLAG_DATA_ONLY indicates that the iterator function should be 258 * called for data blocks only. 259 * 260 * BLOCK_FLAG_NO_LARGE is for internal use only. It informs 261 * ext2fs_block_iterate2 that large files won't be accepted. 262 */ 263#define BLOCK_FLAG_APPEND 1 264#define BLOCK_FLAG_HOLE 1 265#define BLOCK_FLAG_DEPTH_TRAVERSE 2 266#define BLOCK_FLAG_DATA_ONLY 4 267 268#define BLOCK_FLAG_NO_LARGE 0x1000 269 270/* 271 * Magic "block count" return values for the block iterator function. 272 */ 273#define BLOCK_COUNT_IND (-1) 274#define BLOCK_COUNT_DIND (-2) 275#define BLOCK_COUNT_TIND (-3) 276#define BLOCK_COUNT_TRANSLATOR (-4) 277 278#if 0 279/* 280 * Flags for ext2fs_move_blocks 281 */ 282#define EXT2_BMOVE_GET_DBLIST 0x0001 283#define EXT2_BMOVE_DEBUG 0x0002 284#endif 285 286/* 287 * Return flags for the directory iterator functions 288 */ 289#define DIRENT_CHANGED 1 290#define DIRENT_ABORT 2 291#define DIRENT_ERROR 3 292 293/* 294 * Directory iterator flags 295 */ 296 297#define DIRENT_FLAG_INCLUDE_EMPTY 1 298 299 300#define DIRENT_DOT_FILE 1 301#define DIRENT_DOT_DOT_FILE 2 302#define DIRENT_OTHER_FILE 3 303 304/* 305 * Inode scan definitions 306 */ 307typedef struct ext2_struct_inode_scan *ext2_inode_scan; 308 309/* 310 * ext2fs_scan flags 311 */ 312#define EXT2_SF_CHK_BADBLOCKS 0x0001 313#define EXT2_SF_BAD_INODE_BLK 0x0002 314#define EXT2_SF_BAD_EXTRA_BYTES 0x0004 315#define EXT2_SF_SKIP_MISSING_ITABLE 0x0008 316 317/* 318 * ext2fs_check_if_mounted flags 319 */ 320#define EXT2_MF_MOUNTED 1 321#define EXT2_MF_ISROOT 2 322#define EXT2_MF_READONLY 4 323 324/* 325 * Ext2/linux mode flags. We define them here so that we don't need 326 * to depend on the OS's sys/stat.h, since we may be compiling on a 327 * non-Linux system. 328 */ 329#define LINUX_S_IFMT 00170000 330#define LINUX_S_IFSOCK 0140000 331#define LINUX_S_IFLNK 0120000 332#define LINUX_S_IFREG 0100000 333#define LINUX_S_IFBLK 0060000 334#define LINUX_S_IFDIR 0040000 335#define LINUX_S_IFCHR 0020000 336#define LINUX_S_IFIFO 0010000 337#define LINUX_S_ISUID 0004000 338#define LINUX_S_ISGID 0002000 339#define LINUX_S_ISVTX 0001000 340 341#define LINUX_S_IRWXU 00700 342#define LINUX_S_IRUSR 00400 343#define LINUX_S_IWUSR 00200 344#define LINUX_S_IXUSR 00100 345 346#define LINUX_S_IRWXG 00070 347#define LINUX_S_IRGRP 00040 348#define LINUX_S_IWGRP 00020 349#define LINUX_S_IXGRP 00010 350 351#define LINUX_S_IRWXO 00007 352#define LINUX_S_IROTH 00004 353#define LINUX_S_IWOTH 00002 354#define LINUX_S_IXOTH 00001 355 356#define LINUX_S_ISLNK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFLNK) 357#define LINUX_S_ISREG(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFREG) 358#define LINUX_S_ISDIR(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFDIR) 359#define LINUX_S_ISCHR(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFCHR) 360#define LINUX_S_ISBLK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFBLK) 361#define LINUX_S_ISFIFO(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFIFO) 362#define LINUX_S_ISSOCK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFSOCK) 363 364/* 365 * ext2_icount_t abstraction 366 */ 367#define EXT2_ICOUNT_OPT_INCREMENT 0x01 368 369typedef struct ext2_icount *ext2_icount_t; 370 371/* 372 * Flags for ext2fs_bmap 373 */ 374#define BMAP_ALLOC 1 375 376/* 377 * Flags for imager.c functions 378 */ 379#define IMAGER_FLAG_INODEMAP 1 380#define IMAGER_FLAG_SPARSEWRITE 2 381 382/* 383 * For checking structure magic numbers... 384 */ 385 386#define EXT2_CHECK_MAGIC(struct, code) \ 387 if ((struct)->magic != (code)) return (code) 388 389 390/* 391 * For ext2 compression support 392 */ 393#define EXT2FS_COMPRESSED_BLKADDR ((blk_t) 0xffffffff) 394#define HOLE_BLKADDR(_b) ((_b) == 0 || (_b) == EXT2FS_COMPRESSED_BLKADDR) 395 396/* 397 * Features supprted by this version of the library 398 */ 399#define EXT2_LIB_FEATURE_COMPAT_SUPP (EXT2_FEATURE_COMPAT_DIR_PREALLOC|\ 400 EXT2_FEATURE_COMPAT_IMAGIC_INODES|\ 401 EXT3_FEATURE_COMPAT_HAS_JOURNAL) 402 403/* This #ifdef is temporary until compression is fully supported */ 404#ifdef ENABLE_COMPRESSION 405#ifndef I_KNOW_THAT_COMPRESSION_IS_EXPERIMENTAL 406/* If the below warning bugs you, then have 407 `CPPFLAGS=-DI_KNOW_THAT_COMPRESSION_IS_EXPERIMENTAL' in your 408 environment at configure time. */ 409#warning "Compression support is experimental" 410#endif 411#define EXT2_LIB_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE|\ 412 EXT2_FEATURE_INCOMPAT_COMPRESSION|\ 413 EXT3_FEATURE_INCOMPAT_RECOVER) 414#else 415#define EXT2_LIB_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE|\ 416 EXT3_FEATURE_INCOMPAT_RECOVER) 417#endif 418#define EXT2_LIB_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER|\ 419 EXT2_FEATURE_RO_COMPAT_LARGE_FILE) 420/* 421 * function prototypes 422 */ 423 424/* alloc.c */ 425extern errcode_t ext2fs_new_inode(ext2_filsys fs, ino_t dir, int mode, 426 ext2fs_inode_bitmap map, ino_t *ret); 427extern errcode_t ext2fs_new_block(ext2_filsys fs, blk_t goal, 428 ext2fs_block_bitmap map, blk_t *ret); 429extern errcode_t ext2fs_get_free_blocks(ext2_filsys fs, blk_t start, 430 blk_t finish, int num, 431 ext2fs_block_bitmap map, 432 blk_t *ret); 433extern errcode_t ext2fs_alloc_block(ext2_filsys fs, blk_t goal, 434 char *block_buf, blk_t *ret); 435 436/* alloc_tables.c */ 437extern errcode_t ext2fs_allocate_tables(ext2_filsys fs); 438extern errcode_t ext2fs_allocate_group_table(ext2_filsys fs, dgrp_t group, 439 ext2fs_block_bitmap bmap); 440 441/* badblocks.c */ 442extern errcode_t ext2fs_badblocks_list_create(ext2_badblocks_list *ret, 443 int size); 444extern errcode_t ext2fs_badblocks_list_add(ext2_badblocks_list bb, 445 blk_t blk); 446extern int ext2fs_badblocks_list_test(ext2_badblocks_list bb, 447 blk_t blk); 448extern errcode_t 449 ext2fs_badblocks_list_iterate_begin(ext2_badblocks_list bb, 450 ext2_badblocks_iterate *ret); 451extern int ext2fs_badblocks_list_iterate(ext2_badblocks_iterate iter, 452 blk_t *blk); 453extern void ext2fs_badblocks_list_iterate_end(ext2_badblocks_iterate iter); 454extern errcode_t ext2fs_badblocks_copy(ext2_badblocks_list src, 455 ext2_badblocks_list *dest); 456extern int ext2fs_badblocks_equal(ext2_badblocks_list bb1, 457 ext2_badblocks_list bb2); 458 459/* bb_compat */ 460extern errcode_t badblocks_list_create(badblocks_list *ret, int size); 461extern errcode_t badblocks_list_add(badblocks_list bb, blk_t blk); 462extern int badblocks_list_test(badblocks_list bb, blk_t blk); 463extern errcode_t badblocks_list_iterate_begin(badblocks_list bb, 464 badblocks_iterate *ret); 465extern int badblocks_list_iterate(badblocks_iterate iter, blk_t *blk); 466extern void badblocks_list_iterate_end(badblocks_iterate iter); 467extern void badblocks_list_free(badblocks_list bb); 468 469/* bb_inode.c */ 470extern errcode_t ext2fs_update_bb_inode(ext2_filsys fs, 471 ext2_badblocks_list bb_list); 472 473/* bitmaps.c */ 474extern errcode_t ext2fs_write_inode_bitmap(ext2_filsys fs); 475extern errcode_t ext2fs_write_block_bitmap (ext2_filsys fs); 476extern errcode_t ext2fs_read_inode_bitmap (ext2_filsys fs); 477extern errcode_t ext2fs_read_block_bitmap(ext2_filsys fs); 478extern errcode_t ext2fs_allocate_generic_bitmap(__u32 start, 479 __u32 end, 480 __u32 real_end, 481 const char *descr, 482 ext2fs_generic_bitmap *ret); 483extern errcode_t ext2fs_allocate_block_bitmap(ext2_filsys fs, 484 const char *descr, 485 ext2fs_block_bitmap *ret); 486extern errcode_t ext2fs_allocate_inode_bitmap(ext2_filsys fs, 487 const char *descr, 488 ext2fs_inode_bitmap *ret); 489extern errcode_t ext2fs_fudge_inode_bitmap_end(ext2fs_inode_bitmap bitmap, 490 ino_t end, ino_t *oend); 491extern errcode_t ext2fs_fudge_block_bitmap_end(ext2fs_block_bitmap bitmap, 492 blk_t end, blk_t *oend); 493extern void ext2fs_clear_inode_bitmap(ext2fs_inode_bitmap bitmap); 494extern void ext2fs_clear_block_bitmap(ext2fs_block_bitmap bitmap); 495extern errcode_t ext2fs_read_bitmaps(ext2_filsys fs); 496extern errcode_t ext2fs_write_bitmaps(ext2_filsys fs); 497 498/* block.c */ 499extern errcode_t ext2fs_block_iterate(ext2_filsys fs, 500 ino_t ino, 501 int flags, 502 char *block_buf, 503 int (*func)(ext2_filsys fs, 504 blk_t *blocknr, 505 int blockcnt, 506 void *priv_data), 507 void *priv_data); 508errcode_t ext2fs_block_iterate2(ext2_filsys fs, 509 ino_t ino, 510 int flags, 511 char *block_buf, 512 int (*func)(ext2_filsys fs, 513 blk_t *blocknr, 514 e2_blkcnt_t blockcnt, 515 blk_t ref_blk, 516 int ref_offset, 517 void *priv_data), 518 void *priv_data); 519 520/* bmap.c */ 521extern errcode_t ext2fs_bmap(ext2_filsys fs, ino_t ino, 522 struct ext2_inode *inode, 523 char *block_buf, int bmap_flags, 524 blk_t block, blk_t *phys_blk); 525 526 527#if 0 528/* bmove.c */ 529extern errcode_t ext2fs_move_blocks(ext2_filsys fs, 530 ext2fs_block_bitmap reserve, 531 ext2fs_block_bitmap alloc_map, 532 int flags); 533#endif 534 535/* check_desc.c */ 536extern errcode_t ext2fs_check_desc(ext2_filsys fs); 537 538/* closefs.c */ 539extern errcode_t ext2fs_close(ext2_filsys fs); 540extern errcode_t ext2fs_flush(ext2_filsys fs); 541extern int ext2fs_bg_has_super(ext2_filsys fs, int group_block); 542extern void ext2fs_update_dynamic_rev(ext2_filsys fs); 543 544/* cmp_bitmaps.c */ 545extern errcode_t ext2fs_compare_block_bitmap(ext2fs_block_bitmap bm1, 546 ext2fs_block_bitmap bm2); 547extern errcode_t ext2fs_compare_inode_bitmap(ext2fs_inode_bitmap bm1, 548 ext2fs_inode_bitmap bm2); 549 550/* dblist.c */ 551 552extern errcode_t ext2fs_get_num_dirs(ext2_filsys fs, ino_t *ret_num_dirs); 553extern errcode_t ext2fs_init_dblist(ext2_filsys fs, ext2_dblist *ret_dblist); 554extern errcode_t ext2fs_add_dir_block(ext2_dblist dblist, ino_t ino, 555 blk_t blk, int blockcnt); 556extern errcode_t ext2fs_dblist_iterate(ext2_dblist dblist, 557 int (*func)(ext2_filsys fs, struct ext2_db_entry *db_info, 558 void *priv_data), 559 void *priv_data); 560extern errcode_t ext2fs_set_dir_block(ext2_dblist dblist, ino_t ino, 561 blk_t blk, int blockcnt); 562extern errcode_t ext2fs_copy_dblist(ext2_dblist src, 563 ext2_dblist *dest); 564extern int ext2fs_dblist_count(ext2_dblist dblist); 565 566/* dblist_dir.c */ 567extern errcode_t 568 ext2fs_dblist_dir_iterate(ext2_dblist dblist, 569 int flags, 570 char *block_buf, 571 int (*func)(ino_t dir, 572 int entry, 573 struct ext2_dir_entry *dirent, 574 int offset, 575 int blocksize, 576 char *buf, 577 void *priv_data), 578 void *priv_data); 579 580/* dirblock.c */ 581extern errcode_t ext2fs_read_dir_block(ext2_filsys fs, blk_t block, 582 void *buf); 583extern errcode_t ext2fs_write_dir_block(ext2_filsys fs, blk_t block, 584 void *buf); 585 586/* dir_iterate.c */ 587extern errcode_t ext2fs_dir_iterate(ext2_filsys fs, 588 ino_t dir, 589 int flags, 590 char *block_buf, 591 int (*func)(struct ext2_dir_entry *dirent, 592 int offset, 593 int blocksize, 594 char *buf, 595 void *priv_data), 596 void *priv_data); 597 598/* dupfs.c */ 599extern errcode_t ext2fs_dup_handle(ext2_filsys src, ext2_filsys *dest); 600 601/* expanddir.c */ 602extern errcode_t ext2fs_expand_dir(ext2_filsys fs, ino_t dir); 603 604/* fileio.c */ 605extern errcode_t ext2fs_file_open(ext2_filsys fs, ino_t ino, 606 int flags, ext2_file_t *ret); 607extern ext2_filsys ext2fs_file_get_fs(ext2_file_t file); 608extern errcode_t ext2fs_file_close(ext2_file_t file); 609extern errcode_t ext2fs_file_read(ext2_file_t file, void *buf, 610 unsigned int wanted, unsigned int *got); 611extern errcode_t ext2fs_file_write(ext2_file_t file, void *buf, 612 unsigned int nbytes, unsigned int *written); 613extern errcode_t ext2fs_file_lseek(ext2_file_t file, ext2_off_t offset, 614 int whence, ext2_off_t *ret_pos); 615extern ext2_off_t ext2fs_file_get_size(ext2_file_t file); 616extern errcode_t ext2fs_file_set_size(ext2_file_t file, ext2_off_t size); 617 618/* finddev.c */ 619extern char *ext2fs_find_block_device(dev_t device); 620 621/* freefs.c */ 622extern void ext2fs_free(ext2_filsys fs); 623extern void ext2fs_free_generic_bitmap(ext2fs_inode_bitmap bitmap); 624extern void ext2fs_free_block_bitmap(ext2fs_block_bitmap bitmap); 625extern void ext2fs_free_inode_bitmap(ext2fs_inode_bitmap bitmap); 626extern void ext2fs_free_dblist(ext2_dblist dblist); 627extern void ext2fs_badblocks_list_free(badblocks_list bb); 628 629/* getsize.c */ 630extern errcode_t ext2fs_get_device_size(const char *file, int blocksize, 631 blk_t *retblocks); 632 633/* imager.c */ 634extern errcode_t ext2fs_image_inode_write(ext2_filsys fs, int fd, int flags); 635extern errcode_t ext2fs_image_inode_read(ext2_filsys fs, int fd, int flags); 636extern errcode_t ext2fs_image_super_write(ext2_filsys fs, int fd, int flags); 637extern errcode_t ext2fs_image_super_read(ext2_filsys fs, int fd, int flags); 638extern errcode_t ext2fs_image_bitmap_write(ext2_filsys fs, int fd, int flags); 639extern errcode_t ext2fs_image_bitmap_read(ext2_filsys fs, int fd, int flags); 640 641/* initialize.c */ 642extern errcode_t ext2fs_initialize(const char *name, int flags, 643 struct ext2_super_block *param, 644 io_manager manager, ext2_filsys *ret_fs); 645 646/* inode.c */ 647extern errcode_t ext2fs_flush_icache(ext2_filsys fs); 648extern errcode_t ext2fs_open_inode_scan(ext2_filsys fs, int buffer_blocks, 649 ext2_inode_scan *ret_scan); 650extern void ext2fs_close_inode_scan(ext2_inode_scan scan); 651extern errcode_t ext2fs_get_next_inode(ext2_inode_scan scan, ino_t *ino, 652 struct ext2_inode *inode); 653extern errcode_t ext2fs_inode_scan_goto_blockgroup(ext2_inode_scan scan, 654 int group); 655extern void ext2fs_set_inode_callback 656 (ext2_inode_scan scan, 657 errcode_t (*done_group)(ext2_filsys fs, 658 ext2_inode_scan scan, 659 dgrp_t group, 660 void * priv_data), 661 void *done_group_data); 662extern int ext2fs_inode_scan_flags(ext2_inode_scan scan, int set_flags, 663 int clear_flags); 664extern errcode_t ext2fs_read_inode (ext2_filsys fs, ino_t ino, 665 struct ext2_inode * inode); 666extern errcode_t ext2fs_write_inode(ext2_filsys fs, ino_t ino, 667 struct ext2_inode * inode); 668extern errcode_t ext2fs_get_blocks(ext2_filsys fs, ino_t ino, blk_t *blocks); 669extern errcode_t ext2fs_check_directory(ext2_filsys fs, ino_t ino); 670 671/* icount.c */ 672extern void ext2fs_free_icount(ext2_icount_t icount); 673extern errcode_t ext2fs_create_icount2(ext2_filsys fs, int flags, int size, 674 ext2_icount_t hint, ext2_icount_t *ret); 675extern errcode_t ext2fs_create_icount(ext2_filsys fs, int flags, int size, 676 ext2_icount_t *ret); 677extern errcode_t ext2fs_icount_fetch(ext2_icount_t icount, ino_t ino, 678 __u16 *ret); 679extern errcode_t ext2fs_icount_increment(ext2_icount_t icount, ino_t ino, 680 __u16 *ret); 681extern errcode_t ext2fs_icount_decrement(ext2_icount_t icount, ino_t ino, 682 __u16 *ret); 683extern errcode_t ext2fs_icount_store(ext2_icount_t icount, ino_t ino, 684 __u16 count); 685extern ino_t ext2fs_get_icount_size(ext2_icount_t icount); 686errcode_t ext2fs_icount_validate(ext2_icount_t icount, FILE *); 687 688/* ismounted.c */ 689extern errcode_t ext2fs_check_if_mounted(const char *file, int *mount_flags); 690 691/* namei.c */ 692extern errcode_t ext2fs_lookup(ext2_filsys fs, ino_t dir, const char *name, 693 int namelen, char *buf, ino_t *inode); 694extern errcode_t ext2fs_namei(ext2_filsys fs, ino_t root, ino_t cwd, 695 const char *name, ino_t *inode); 696errcode_t ext2fs_namei_follow(ext2_filsys fs, ino_t root, ino_t cwd, 697 const char *name, ino_t *inode); 698extern errcode_t ext2fs_follow_link(ext2_filsys fs, ino_t root, ino_t cwd, 699 ino_t inode, ino_t *res_inode); 700 701/* native.c */ 702int ext2fs_native_flag(void); 703 704/* newdir.c */ 705extern errcode_t ext2fs_new_dir_block(ext2_filsys fs, ino_t dir_ino, 706 ino_t parent_ino, char **block); 707 708/* mkdir.c */ 709extern errcode_t ext2fs_mkdir(ext2_filsys fs, ino_t parent, ino_t inum, 710 const char *name); 711 712/* mkjournal.c */ 713extern errcode_t ext2fs_add_journal_device(ext2_filsys fs, char *device, 714 blk_t size, int flags); 715extern errcode_t ext2fs_add_journal_fs(ext2_filsys fs, blk_t size, 716 int flags); 717 718/* openfs.c */ 719extern errcode_t ext2fs_open(const char *name, int flags, int superblock, 720 int block_size, io_manager manager, 721 ext2_filsys *ret_fs); 722 723/* get_pathname.c */ 724extern errcode_t ext2fs_get_pathname(ext2_filsys fs, ino_t dir, ino_t ino, 725 char **name); 726 727/* link.c */ 728errcode_t ext2fs_link(ext2_filsys fs, ino_t dir, const char *name, 729 ino_t ino, int flags); 730errcode_t ext2fs_unlink(ext2_filsys fs, ino_t dir, const char *name, 731 ino_t ino, int flags); 732 733/* read_bb.c */ 734extern errcode_t ext2fs_read_bb_inode(ext2_filsys fs, 735 ext2_badblocks_list *bb_list); 736 737/* read_bb_file.c */ 738extern errcode_t ext2fs_read_bb_FILE2(ext2_filsys fs, FILE *f, 739 ext2_badblocks_list *bb_list, 740 void *private, 741 void (*invalid)(ext2_filsys fs, 742 blk_t blk, 743 char *badstr, 744 void *private)); 745extern errcode_t ext2fs_read_bb_FILE(ext2_filsys fs, FILE *f, 746 ext2_badblocks_list *bb_list, 747 void (*invalid)(ext2_filsys fs, 748 blk_t blk)); 749 750/* rs_bitmap.c */ 751extern errcode_t ext2fs_resize_generic_bitmap(__u32 new_end, 752 __u32 new_real_end, 753 ext2fs_generic_bitmap bmap); 754extern errcode_t ext2fs_resize_inode_bitmap(__u32 new_end, __u32 new_real_end, 755 ext2fs_inode_bitmap bmap); 756extern errcode_t ext2fs_resize_block_bitmap(__u32 new_end, __u32 new_real_end, 757 ext2fs_block_bitmap bmap); 758extern errcode_t ext2fs_copy_bitmap(ext2fs_generic_bitmap src, 759 ext2fs_generic_bitmap *dest); 760 761/* swapfs.c */ 762extern void ext2fs_swap_super(struct ext2_super_block * super); 763extern void ext2fs_swap_group_desc(struct ext2_group_desc *gdp); 764extern void ext2fs_swap_inode(ext2_filsys fs,struct ext2_inode *t, 765 struct ext2_inode *f, int hostorder); 766 767/* valid_blk.c */ 768extern int ext2fs_inode_has_valid_blocks(struct ext2_inode *inode); 769 770/* version.c */ 771extern int ext2fs_parse_version_string(const char *ver_string); 772extern int ext2fs_get_library_version(const char **ver_string, 773 const char **date_string); 774 775/* inline functions */ 776extern errcode_t ext2fs_get_mem(unsigned long size, void **ptr); 777extern errcode_t ext2fs_free_mem(void **ptr); 778extern errcode_t ext2fs_resize_mem(unsigned long old_size, 779 unsigned long size, void **ptr); 780extern void ext2fs_mark_super_dirty(ext2_filsys fs); 781extern void ext2fs_mark_changed(ext2_filsys fs); 782extern int ext2fs_test_changed(ext2_filsys fs); 783extern void ext2fs_mark_valid(ext2_filsys fs); 784extern void ext2fs_unmark_valid(ext2_filsys fs); 785extern int ext2fs_test_valid(ext2_filsys fs); 786extern void ext2fs_mark_ib_dirty(ext2_filsys fs); 787extern void ext2fs_mark_bb_dirty(ext2_filsys fs); 788extern int ext2fs_test_ib_dirty(ext2_filsys fs); 789extern int ext2fs_test_bb_dirty(ext2_filsys fs); 790extern int ext2fs_group_of_blk(ext2_filsys fs, blk_t blk); 791extern int ext2fs_group_of_ino(ext2_filsys fs, ino_t ino); 792 793/* 794 * The actual inlined functions definitions themselves... 795 * 796 * If NO_INLINE_FUNCS is defined, then we won't try to do inline 797 * functions at all! 798 */ 799#if (defined(INCLUDE_INLINE_FUNCS) || !defined(NO_INLINE_FUNCS)) 800#ifdef INCLUDE_INLINE_FUNCS 801#define _INLINE_ extern 802#else 803#ifdef __GNUC__ 804#define _INLINE_ extern __inline__ 805#else /* For Watcom C */ 806#define _INLINE_ extern inline 807#endif 808#endif 809 810#ifndef EXT2_CUSTOM_MEMORY_ROUTINES 811/* 812 * Allocate memory 813 */ 814_INLINE_ errcode_t ext2fs_get_mem(unsigned long size, void **ptr) 815{ 816 *ptr = malloc(size); 817 if (!*ptr) 818 return EXT2_ET_NO_MEMORY; 819 return 0; 820} 821 822/* 823 * Free memory 824 */ 825_INLINE_ errcode_t ext2fs_free_mem(void **ptr) 826{ 827 free(*ptr); 828 *ptr = 0; 829 return 0; 830} 831 832/* 833 * Resize memory 834 */ 835_INLINE_ errcode_t ext2fs_resize_mem(unsigned long old_size, 836 unsigned long size, void **ptr) 837{ 838 void *p; 839 840 p = realloc(*ptr, size); 841 if (!p) 842 return EXT2_ET_NO_MEMORY; 843 *ptr = p; 844 return 0; 845} 846#endif /* Custom memory routines */ 847 848/* 849 * Mark a filesystem superblock as dirty 850 */ 851_INLINE_ void ext2fs_mark_super_dirty(ext2_filsys fs) 852{ 853 fs->flags |= EXT2_FLAG_DIRTY | EXT2_FLAG_CHANGED; 854} 855 856/* 857 * Mark a filesystem as changed 858 */ 859_INLINE_ void ext2fs_mark_changed(ext2_filsys fs) 860{ 861 fs->flags |= EXT2_FLAG_CHANGED; 862} 863 864/* 865 * Check to see if a filesystem has changed 866 */ 867_INLINE_ int ext2fs_test_changed(ext2_filsys fs) 868{ 869 return (fs->flags & EXT2_FLAG_CHANGED); 870} 871 872/* 873 * Mark a filesystem as valid 874 */ 875_INLINE_ void ext2fs_mark_valid(ext2_filsys fs) 876{ 877 fs->flags |= EXT2_FLAG_VALID; 878} 879 880/* 881 * Mark a filesystem as NOT valid 882 */ 883_INLINE_ void ext2fs_unmark_valid(ext2_filsys fs) 884{ 885 fs->flags &= ~EXT2_FLAG_VALID; 886} 887 888/* 889 * Check to see if a filesystem is valid 890 */ 891_INLINE_ int ext2fs_test_valid(ext2_filsys fs) 892{ 893 return (fs->flags & EXT2_FLAG_VALID); 894} 895 896/* 897 * Mark the inode bitmap as dirty 898 */ 899_INLINE_ void ext2fs_mark_ib_dirty(ext2_filsys fs) 900{ 901 fs->flags |= EXT2_FLAG_IB_DIRTY | EXT2_FLAG_CHANGED; 902} 903 904/* 905 * Mark the block bitmap as dirty 906 */ 907_INLINE_ void ext2fs_mark_bb_dirty(ext2_filsys fs) 908{ 909 fs->flags |= EXT2_FLAG_BB_DIRTY | EXT2_FLAG_CHANGED; 910} 911 912/* 913 * Check to see if a filesystem's inode bitmap is dirty 914 */ 915_INLINE_ int ext2fs_test_ib_dirty(ext2_filsys fs) 916{ 917 return (fs->flags & EXT2_FLAG_IB_DIRTY); 918} 919 920/* 921 * Check to see if a filesystem's block bitmap is dirty 922 */ 923_INLINE_ int ext2fs_test_bb_dirty(ext2_filsys fs) 924{ 925 return (fs->flags & EXT2_FLAG_BB_DIRTY); 926} 927 928/* 929 * Return the group # of a block 930 */ 931_INLINE_ int ext2fs_group_of_blk(ext2_filsys fs, blk_t blk) 932{ 933 return (blk - fs->super->s_first_data_block) / 934 fs->super->s_blocks_per_group; 935} 936 937/* 938 * Return the group # of an inode number 939 */ 940_INLINE_ int ext2fs_group_of_ino(ext2_filsys fs, ino_t ino) 941{ 942 return (ino - 1) / fs->super->s_inodes_per_group; 943} 944#undef _INLINE_ 945#endif 946 947#ifdef __cplusplus 948} 949#endif 950 951#endif /* _EXT2FS_EXT2FS_H */ 952